diff --git a/MAINTAINERS b/MAINTAINERS
index 3ed62dcd144e580665451e7e128d531030edd9ba..a62da6d0f94395056ab7dd0ab9bcbf7372c3fe39 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20183,14 +20183,6 @@ F: drivers/cdrom/cdrom.c
F: include/linux/cdrom.h
F: include/uapi/linux/cdrom.h
-UNISYS S-PAR DRIVERS
-M: David Kershner <david.kershner@unisys.com>
-L: sparmaintainer@unisys.com (Unisys internal)
-S: Supported
-F: drivers/staging/unisys/
-F: drivers/visorbus/
-F: include/linux/visorbus.h
-
UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER
R: Alim Akhtar <alim.akhtar@samsung.com>
R: Avri Altman <avri.altman@wdc.com>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 8d6cd5d087222bc5755350269e4145651d65d4b5..0cbbe2c58648d9ff709652ba012b785a45711bac 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -225,8 +225,6 @@ source "drivers/mux/Kconfig"
source "drivers/opp/Kconfig"
-source "drivers/visorbus/Kconfig"
-
source "drivers/siox/Kconfig"
source "drivers/slimbus/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 020780b6b4d221c4dd18cd0af9ec21b4590715ad..e40942c0b44585614c15b5fd37e1a9b5364cd2d8 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -181,7 +181,6 @@ obj-$(CONFIG_FPGA) += fpga/
obj-$(CONFIG_FSI) += fsi/
obj-$(CONFIG_TEE) += tee/
obj-$(CONFIG_MULTIPLEXER) += mux/
-obj-$(CONFIG_UNISYS_VISORBUS) += visorbus/
obj-$(CONFIG_SIOX) += siox/
obj-$(CONFIG_GNSS) += gnss/
obj-$(CONFIG_INTERCONNECT) += interconnect/
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index fc274737053dc36f5fc5889012a46db9081c72ea..a4d9f39dde9044100a382dddad8024e10ba256ce 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -64,8 +64,6 @@ source "drivers/staging/gdm724x/Kconfig"
source "drivers/staging/fwserial/Kconfig"
-source "drivers/staging/unisys/Kconfig"
-
source "drivers/staging/clocking-wizard/Kconfig"
source "drivers/staging/fbtft/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 65e317922e3f1b65e11c8931d8fd82955a51ba10..a17a2aeacebaa968884dca57464457fac12ce217 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -22,7 +22,6 @@ obj-$(CONFIG_MFD_NVEC) += nvec/
obj-$(CONFIG_STAGING_BOARD) += board/
obj-$(CONFIG_LTE_GDM724X) += gdm724x/
obj-$(CONFIG_FIREWIRE_SERIAL) += fwserial/
-obj-$(CONFIG_UNISYSSPAR) += unisys/
obj-$(CONFIG_COMMON_CLK_XLNX_CLKWZRD) += clocking-wizard/
obj-$(CONFIG_FB_TFT) += fbtft/
obj-$(CONFIG_MOST) += most/
diff --git a/drivers/staging/unisys/Documentation/ABI/sysfs-platform-visorchipset b/drivers/staging/unisys/Documentation/ABI/sysfs-platform-visorchipset
deleted file mode 100644
index c2359de17eaf3ce462b4dec947bc05aa2ecba827..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/Documentation/ABI/sysfs-platform-visorchipset
+++ /dev/null
@@ -1,89 +0,0 @@
-This file describes sysfs entries beneath /devices/platform/visorchipset.
-
-What: install/error
-Date: 7/18/2014
-KernelVersion: TBD
-Contact: sparmaintainer@unisys.com
-Description: used to send the ID of a string that should be displayed on
- s-Par's automatic installation progress screen when an error
- is encountered during installation. This field has no effect
- if not in installation mode.
-Users: sparmaintainer@unisys.com
-
-What: install/remainingsteps
-Date: 7/18/2014
-KernelVersion: TBD
-Contact: sparmaintainer@unisys.com
-Description: used to set the value of the progress bar on the s-Par automatic
- installation progress screen. This field has no effect if not in
- installation mode.
-Users: sparmaintainer@unisys.com
-
-What: install/textid
-Date: 7/18/2014
-KernelVersion: TBD
-Contact: sparmaintainer@unisys.com
-Description: used to send the ID of a string that should be displayed on
- s-Par's automatic installation progress screen. Setting this
- field when not in installation mode (boottotool was set on
- the previous guest boot) has no effect.
-Users: sparmaintainer@unisys.com
-
-What: install/boottotool
-Date: 7/18/2014
-KernelVersion: TBD
-Contact: sparmaintainer@unisys.com
-Description: The boottotool flag controls s-Par behavior on the next boot of
- this guest. Setting the flag will cause the guest to boot from
- the utility and installation image, which will use the value in
- the toolaction field to determine what operation is being
- requested.
-Users: sparmaintainer@unisys.com
-
-What: install/toolaction
-Date: 7/18/2014
-KernelVersion: TBD
-Contact: sparmaintainer@unisys.com
-Description: This field is used to tell s-Par which type of recovery tool
- action to perform on the next guest boot-up. The meaning of the
- value is dependent on the type of installation software used to
- commission the guest.
-Users: sparmaintainer@unisys.com
-
-What: parahotplug/deviceenabled
-Date: 7/18/2014
-KernelVersion: TBD
-Contact: sparmaintainer@unisys.com
-Description: This entry is used by a Unisys support script installed on the
- guest, and triggered by a udev event. The support script is
- responsible for enabling and disabling SR-IOV devices when the
- PF device is being recovered in another guest.
-
- Some SR-IOV devices have problems when the PF is reset without
- first disabling all VFs attached to that PF. s-Par handles this
- situation by sending a message to guests using these VFs, and
- the script will disable the device. When the PF is recovered,
- another message is sent to the guests to re-enable the VFs.
-
- The parahotplug/deviceenabled interface is used to acknowledge
- the recovery message.
-Users: sparmaintainer@unisys.com
-
-What: parahotplug/devicedisabled
-Date: 7/18/2014
-KernelVersion: TBD
-Contact: sparmaintainer@unisys.com
-Description: This entry is used by a Unisys support script installed on the
- guest, and triggered by a udev event. The support script is
- responsible for enabling and disabling SR-IOV devices when the
- PF device is being recovered in another guest.
-
- Some SR-IOV devices have problems when the PF is reset without
- first disabling all VFs attached to that PF. s-Par handles this
- situation by sending a message to guests using these VFs, and
- the script will disable the device. When the PF is recovered,
- another message is sent to the guests to re-enable the VFs.
-
- The parahotplug/devicedisaabled interface is used to acknowledge
- the initial recovery message.
-Users: sparmaintainer@unisys.com
diff --git a/drivers/staging/unisys/Documentation/overview.txt b/drivers/staging/unisys/Documentation/overview.txt
deleted file mode 100644
index cf29f884cbe04f5c703aa44ec7dd5d02e480e7c6..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/Documentation/overview.txt
+++ /dev/null
@@ -1,337 +0,0 @@
-1. Overview
------------
-
-This document describes the driver set for Unisys Secure Partitioning
-(s-Par(R)).
-
-s-Par is firmware that provides hardware partitioning capabilities for
-splitting large-scale Intel x86 servers into multiple isolated
-partitions. s-Par provides a set of para-virtualized device drivers to
-allow guest partitions on the same server to share devices that would
-normally be unsharable, specifically:
-
-* visornic - network interface
-* visorhba - scsi disk adapter
-* visorinput - keyboard and mouse
-
-These drivers conform to the standard Linux bus/device model described
-within Documentation/driver-api/driver-model/, and utilize a driver named
-visorbus to present the virtual busses involved. Drivers in the 'visor*'
-driver set are commonly referred to as "guest drivers" or "client drivers".
-All drivers except visorbus expose a device of a specific usable class to the
-Linux guest environment (e.g., block, network, or input), and are collectively
-referred to as "function drivers".
-
-The back-end for each device is owned and managed by a small,
-single-purpose service partition in the s-Par firmware, which communicates
-with each guest partition sharing that device through an area of shared memory
-called a "channel". In s-Par nomenclature, the back-end is often referred to
-as the "service partition", "IO partition" (for virtual network and scsi disk
-devices), or "console partition" (for virtual keyboard and mouse devices).
-
-Each virtual device requires exactly 1 dedicated channel, which the guest
-driver and back-end use to communicate. The hypervisor need not intervene
-(other than normal interrupt handling) in the interactions that occur across
-this channel.
-
-NOT covered in this document:
-
-* s-Par also supports sharing physical PCI adapters via SR-IOV, but
- because this requires no specific support in the guest partitions, it will
- not be discussed in this document. Shared SR-IOV devices should be used
- wherever possible for highest performance.
-
-* Because the s-Par back-end provides a standard EFI framebuffer to each
- guest, the already-existing efifb Linux driver is used to provide guest
- video access. Thus, the only s-Par-unique support that is necessary to
- provide a guest graphics console are for keyboard and mouse (via visorinput).
-
-
-2. Driver Descriptions
-----------------------
-
-2.1. visorbus
--------------
-
-2.1.1. Overview
----------------
-
-The visorbus driver handles the virtual busses on which all of the virtual
-devices reside. It provides a registration function named
-visorbus_register_visor_driver() that is called by each of the function
-drivers at initialization time, which the function driver uses to tell
-visorbus about the device classes (via specifying a list of device type
-GUIDs) it wants to handle. For use by function drivers, visorbus provides
-implementation for struct visor_driver and struct visor_device, as well
-as utility functions for communicating with the back-end.
-
-visorbus is associated with ACPI id "PNP0A07" in modules.alias, so if built
-as a module it will typically be loaded automatically via standard udev or
-systemd (God help us) configurations.
-
-visorbus can similarly force auto-loading of function drivers for virtual
-devices it discovers, as it includes a MODALIAS environment variable of this
-form in the hotplug uevent environment when each virtual device is
-discovered:
-
- visorbus:<device type GUID>
-
-visorbus notifies each function driver when a device of its registered class
-arrives and departs, by calling the function driver's probe() and remove()
-methods.
-
-The actual struct device objects that correspond to each virtual bus and
-each virtual device are created and owned by visorbus. These device objects
-are created in response to messages from the s-Par back-end received on a
-special control channel called the "controlvm channel" (each guest partition
-has access to exactly 1 controlvm channel), and have a lifetime that is
-independent of the function drivers that control them.
-
-2.1.2. "struct visor device" Function Driver Interfaces
--------------------------------------------------------
-
-The interface between visorbus and its function drivers is defined in
-visorbus.h, and described below.
-
-When a visor function driver loads, it calls visorbus_register_visor_driver()
-to register itself with visorbus. The significant information passed in this
-exchange is as follows:
-
-* the GUID(s) of the channel type(s) that are handled by this driver, as
- well as a "friendly name" identifying each (this will be published under
- /sys/devices/visorbus<x>/dev<y>)
-
-* the addresses of callback functions to be called whenever a virtual
- device/channel with the appropriate channel-type GUID(s) appears or
- disappears
-
-* the address of a "channel_interrupt" function, which will be automatically
- called at specific intervals to enable the driver to poll the device
- channel for activity
-
-The following functions implemented within each function driver will be
-called automatically by the visorbus driver at appropriate times:
-
-* The probe() function notifies about the creation of each new virtual
- device/channel instance.
-
-* The remove() function notifies about the destruction of a virtual
- device/channel instance.
-
-* The channel_interrupt() function is called at frequent intervals to
- give the function driver an opportunity to poll the virtual device channel
- for requests. Information is passed to this function to enable the
- function driver to use the visorchannel_signalinsert() and
- visorchannel_signalremove() functions to respond to and initiate activity
- over the channel. (Note that since it is the visorbus driver that
- determines when this is called, it is very easy to switch to
- interrupt-driven mechanisms when available for particular virtual device
- types.)
-
-* The pause() function is called should it ever be necessary to direct the
- function driver to temporarily stop accessing the device channel. An
- example of when this is needed is when the service partition implementing
- the back-end of the virtual device needs to be recovered. After a
- successful return of pause(), the function driver must not access the
- device channel until a subsequent resume() occurs.
-
-* The resume() function is the "book-end" to pause(), and is described above.
-
-2.1.3. sysfs Advertised Information
------------------------------------
-
-Because visorbus is a standard Linux bus driver in the model described in
-Documentation/driver-api/driver-model/, the hierarchy of s-Par virtual devices is
-published in the sysfs tree beneath /bus/visorbus/, e.g.,
-/sys/bus/visorbus/devices/ might look like:
-
- vbus1:dev1 -> ../../../devices/visorbus1/vbus1:dev1
- vbus1:dev2 -> ../../../devices/visorbus1/vbus1:dev2
- vbus1:dev3 -> ../../../devices/visorbus1/vbus1:dev3
- vbus2:dev0 -> ../../../devices/visorbus2/vbus2:dev0
- vbus2:dev1 -> ../../../devices/visorbus2/vbus2:dev1
- vbus2:dev2 -> ../../../devices/visorbus2/vbus2:dev2
- visorbus1 -> ../../../devices/visorbus1
- visorbus2 -> ../../../devices/visorbus2
-
-visor_device notes:
-
-* Each visorbus<n> entry denotes the existence of a struct visor_device
- denoting virtual bus #<n>. A unique s-Par channel exists for each such
- virtual bus.
-
-* Virtual bus numbers uniquely identify s-Par back-end service partitions.
- In this example, bus 1 corresponds to the s-Par console partition
- (controls keyboard, video, and mouse), whereas bus 2 corresponds to the
- s-Par IO partition (controls network and disk).
-
-* Each vbus<x>:dev<y> entry denotes the existence of a struct visor_device
- denoting virtual device #<y> outboard of virtual bus #<x>. A unique s-Par
- channel exists for each such virtual device.
-
-* If a function driver has loaded and claimed a particular device, the
- bus/visorbus/devices/vbus<x>:dev<y>/driver symlink will indicate that
- function driver.
-
-Every active visorbus device will have a sysfs subtree under:
-
- /sys/devices/visorbus<x>/vbus<x>:dev<y>/
-
-The following files exist under /sys/devices/visorbus<x>/vbus<x>:dev<y>:
-
- subsystem link to sysfs tree that describes the
- visorbus bus type; e.g.:
- ../../../bus/visorbus
-
- driver link to sysfs tree that describes the
- function driver controlling this device;
- e.g.:
- ../../../bus/visorbus/drivers/visorhba
- Note that this "driver" link will not exist
- if the appropriate function driver has not
- been loaded yet.
-
- channel properties of the device channel (all in
- ascii text format)
-
- clientpartition handle identifying the guest (client) side
- of this channel, e.g. 0x10000000.
-
- nbytes total size of this channel in bytes
-
- physaddr the guest physical address for the base of
- the channel
-
- typeguid a GUID identifying the channel type, in
- xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx notation
-
- typename a "friendly name" for this channel type, e.g.,
- "keyboard". Note that this name is provided by
- a particular function driver, so "typename"
- will return an empty string until AFTER the
- appropriate function driver controlling this
- channel type is loaded
-
- zoneguid a GUID identifying the channel zone, in
- xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx notation
-
-
-2.2. visorhba
--------------
-
-The visorhba driver registers with visorbus as the function driver to
-handle virtual scsi disk devices, specified using the
-VISOR_VHBA_CHANNEL_GUID type in the visorbus_register_visor_driver()
-call. visorhba uses scsi_add_host() to expose a Linux block device
-(e.g., /sys/block/) in the guest environment for each s-Par virtual device.
-
-visorhba provides access to a shared SCSI host bus adapter and one or more
-disk devices, by proxying SCSI commands between the guest and the service
-partition that owns the shared SCSI adapter, using a channel between the
-guest and the service partition. The disks that appear on the shared bus
-are defined by the s-Par configuration and enforced by the service partition,
-while the guest driver handles sending commands and handling responses. Each
-disk is shared as a whole to a guest. Sharing the bus adapter in this way
-provides resiliency; should the device encounter an error, only the service
-partition is rebooted, and the device is reinitialized. This allows
-guests to continue running and to recover from the error.
-
-When compiled as a module, visorhba can be autoloaded by visorbus in
-standard udev/systemd environments, as it includes the modules.alias
-definition:
-
- "visorbus:"+VISOR_VHBA_CHANNEL_GUID_STR
-
-i.e.:
-
- alias visorbus:414815ed-c58c-11da-95a9-00e08161165f visorhba
-
-
-2.3. visornic
--------------
-
-The visornic driver registers with visorbus as the function driver to
-handle virtual network devices, specified using the
-VISOR_VNIC_CHANNEL_GUID type in the visorbus_register_visor_driver()
-call. visornic uses register_netdev() to expose a Linux device of class net
-(e.g., /sys/class/net/) in the guest environment for each s-Par virtual
-device.
-
-visornic provides a paravirtualized network interface to a
-guest by proxying buffer information between the guest and the service
-partition that owns the shared network interface, using a channel
-between the guest and the service partition. The connectivity of this
-interface with the shared interface and possibly other guest
-partitions is defined by the s-Par configuration and enforced by the
-service partition; the guest driver handles communication and link
-status.
-
-When compiled as a module, visornic can be autoloaded by visorbus in
-standard udev/systemd environments, as it includes the modules.alias
-definition:
-
- "visorbus:"+VISOR_VNIC_CHANNEL_GUID_STR
-
-i.e.:
-
- alias visorbus:8cd5994d-c58e-11da-95a9-00e08161165f visornic
-
-
-2.4. visorinput
----------------
-
-The visorinput driver registers with visorbus as the function driver to
-handle human input devices, specified using the
-VISOR_KEYBOARD_CHANNEL_GUID and VISOR_MOUSE_CHANNEL_GUID
-types in the visorbus_register_visor_driver() call. visorinput uses
-input_register_device() to expose devices of class input
-(e.g., /sys/class/input/) for virtual keyboard and virtual mouse devices.
-A s-Par virtual keyboard device maps 1-to-1 with a Linux input device
-named "visor Keyboard", while a s-Par virtual mouse device has 2 Linux input
-devices created for it: 1 named "visor Wheel", and 1 named "visor Mouse".
-
-By registering as input class devices, modern versions of X will
-automatically find and properly use s-Par virtual keyboard and mouse devices.
-As the s-Par back-end reports keyboard and mouse activity via events on the
-virtual device channel, the visorinput driver delivers the activity to the
-Linux environment by calling input_report_key() and input_report_abs().
-
-You can interact with the guest console using the usyscon Partition Desktop
-(a.k.a., "pd") application, provided as part of s-Par. After installing the
-usyscon Partition Desktop into a Linux environment via the
-usyscon_partitiondesktop-*.rpm, or into a Windows environment via
-PartitionDesktop.msi, you will be able to launch a console for your guest
-Linux environment by clicking the console icon in the s-Par web UI.
-
-When compiled as a module, visorinput can be autoloaded by visorbus in
-standard udev/systemd environments, as it includes the modules.alias
-definition:
-
- "visorbus:"+VISOR_MOUSE_CHANNEL_GUID_STR
- "visorbus:"+VISOR_KEYBOARD_CHANNEL_GUID_STR
-
-i.e.:
-
- alias visorbus:c73416d0-b0b8-44af-b304-9d2ae99f1b3d visorinput
- alias visorbus:addf07d4-94a9-46e2-81c3-61abcdbdbd87 visorinput
-
-
-3. Minimum Required Driver Set
-------------------------------
-
-visorbus is required for every Linux guest running under s-Par.
-
-visorhba is typically required for a Linux guest running under s-Par, as it
-is required if your guest boot disk is a virtual device provided by the s-Par
-back-end, which is the default configuration. However, for advanced
-configurations where the Linux guest boots via an SR-IOV-provided HBA or
-SAN disk for example, visorhba is not technically required.
-
-visornic is typically required for a Linux guest running under s-Par, as it
-is required if your guest network interface is a virtual device provided by
-the s-Par back-end, which is the default configuration. However, for
-configurations where the Linux guest is provided with an SR-IOV NIC
-for example, visornic is not technically required.
-
-visorinput is only required for a Linux guest running under s-Par if you
-require graphics-mode access to your guest console.
diff --git a/drivers/staging/unisys/Kconfig b/drivers/staging/unisys/Kconfig
deleted file mode 100644
index 43fe1ce538e1f21d4f56e5d15e696f56bebd92e9..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/Kconfig
+++ /dev/null
@@ -1,16 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Unisys SPAR driver configuration
-#
-menuconfig UNISYSSPAR
- bool "Unisys SPAR driver support"
- help
- Support for the Unisys SPAR drivers
-
-if UNISYSSPAR
-
-source "drivers/staging/unisys/visornic/Kconfig"
-source "drivers/staging/unisys/visorinput/Kconfig"
-source "drivers/staging/unisys/visorhba/Kconfig"
-
-endif # UNISYSSPAR
diff --git a/drivers/staging/unisys/MAINTAINERS b/drivers/staging/unisys/MAINTAINERS
deleted file mode 100644
index aaddc619c329b7e4e6bace508278b97ae396c6df..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/MAINTAINERS
+++ /dev/null
@@ -1,5 +0,0 @@
-Unisys s-Par drivers
-M: David Kershner <sparmaintainer@unisys.com>
-S: Maintained
-F: drivers/staging/unisys/Documentation/overview.txt
-F: drivers/staging/unisys/
diff --git a/drivers/staging/unisys/Makefile b/drivers/staging/unisys/Makefile
deleted file mode 100644
index c0f76cc196a693e41023a863394f033da7fc3495..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for Unisys SPAR drivers
-#
-obj-$(CONFIG_UNISYS_VISORNIC) += visornic/
-obj-$(CONFIG_UNISYS_VISORINPUT) += visorinput/
-obj-$(CONFIG_UNISYS_VISORHBA) += visorhba/
diff --git a/drivers/staging/unisys/TODO b/drivers/staging/unisys/TODO
deleted file mode 100644
index d863f266bf76f433a755053069024b5b86eb831d..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/TODO
+++ /dev/null
@@ -1,16 +0,0 @@
-TODO:
- - enhance visornic to use channel_interrupt() hook instead of a
- kernel thread
- - enhance visorhba to use channel_interrupt() hook instead of a
- kernel thread
- - teach visorbus to handle virtual interrupts triggered by s-Par
- back-end, and call function driver's channel_interrupt() function
- when they occur
- - enhance debugfs interfaces (e.g., per device, etc.)
- - upgrade/remove deprecated workqueue operations
- - move individual drivers into proper driver subsystems
-
-Patches to:
- Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- Ken Cox <jkc@redhat.com>
- Unisys s-Par maintainer mailing list <sparmaintainer@unisys.com>
diff --git a/drivers/staging/unisys/include/iochannel.h b/drivers/staging/unisys/include/iochannel.h
deleted file mode 100644
index 9ef812c0bc4207f0ffd95c4e4d8f72d63e1e8e8b..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/include/iochannel.h
+++ /dev/null
@@ -1,571 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright (C) 2010 - 2016 UNISYS CORPORATION
- * All rights reserved.
- */
-
-#ifndef __IOCHANNEL_H__
-#define __IOCHANNEL_H__
-
-/*
- * Everything needed for IOPart-GuestPart communication is define in
- * this file. Note: Everything is OS-independent because this file is
- * used by Windows, Linux and possible EFI drivers.
- *
- * Communication flow between the IOPart and GuestPart uses the channel headers
- * channel state. The following states are currently being used:
- * UNINIT(All Zeroes), CHANNEL_ATTACHING, CHANNEL_ATTACHED, CHANNEL_OPENED
- *
- * Additional states will be used later. No locking is needed to switch between
- * states due to the following rules:
- *
- * 1. IOPart is only the only partition allowed to change from UNIT
- * 2. IOPart is only the only partition allowed to change from
- * CHANNEL_ATTACHING
- * 3. GuestPart is only the only partition allowed to change from
- * CHANNEL_ATTACHED
- *
- * The state changes are the following: IOPart sees the channel is in UNINIT,
- * UNINIT -> CHANNEL_ATTACHING (performed only by IOPart)
- * CHANNEL_ATTACHING -> CHANNEL_ATTACHED (performed only by IOPart)
- * CHANNEL_ATTACHED -> CHANNEL_OPENED (performed only by GuestPart)
- */
-
-#include <linux/uuid.h>
-#include <linux/skbuff.h>
-#include <linux/visorbus.h>
-
-/*
- * Must increment these whenever you insert or delete fields within this channel
- * struct. Also increment whenever you change the meaning of fields within this
- * channel struct so as to break pre-existing software. Note that you can
- * usually add fields to the END of the channel struct without needing to
- * increment this.
- */
-#define VISOR_VHBA_CHANNEL_VERSIONID 2
-#define VISOR_VNIC_CHANNEL_VERSIONID 2
-
-/*
- * Everything necessary to handle SCSI & NIC traffic between Guest Partition and
- * IO Partition is defined below.
- */
-
-/*
- * Define the two queues per data channel between iopart and ioguestparts.
- * IOCHAN_TO_IOPART -- used by guest to 'insert' signals to iopart.
- * IOCHAN_FROM_IOPART -- used by guest to 'remove' signals from IO part.
- */
-#define IOCHAN_TO_IOPART 0
-#define IOCHAN_FROM_IOPART 1
-
-/* Size of cdb - i.e., SCSI cmnd */
-#define MAX_CMND_SIZE 16
-
-/* Unisys-specific DMA direction values */
-enum uis_dma_data_direction {
- UIS_DMA_BIDIRECTIONAL = 0,
- UIS_DMA_TO_DEVICE = 1,
- UIS_DMA_FROM_DEVICE = 2,
- UIS_DMA_NONE = 3
-};
-
-#define MAX_SENSE_SIZE 64
-#define MAX_PHYS_INFO 64
-
-/*
- * enum net_types - Various types of network packets that can be sent in cmdrsp.
- * @NET_RCV_POST: Submit buffer to hold receiving incoming packet.
- * @NET_RCV: visornic -> uisnic. Incoming packet received.
- * @NET_XMIT: uisnic -> visornic. For outgoing packet.
- * @NET_XMIT_DONE: visornic -> uisnic. Outgoing packet xmitted.
- * @NET_RCV_ENBDIS: uisnic -> visornic. Enable/Disable packet reception.
- * @NET_RCV_ENBDIS_ACK: visornic -> uisnic. Acknowledge enable/disable packet.
- * @NET_RCV_PROMISC: uisnic -> visornic. Enable/Disable promiscuous mode.
- * @NET_CONNECT_STATUS: visornic -> uisnic. Indicate the loss or restoration of
- * a network connection.
- * @NET_MACADDR: uisnic -> visornic. Indicates the client has requested
- * to update it's MAC address.
- * @NET_MACADDR_ACK: MAC address acknowledge.
- */
-enum net_types {
- NET_RCV_POST = 0,
- NET_RCV,
- NET_XMIT,
- NET_XMIT_DONE,
- NET_RCV_ENBDIS,
- NET_RCV_ENBDIS_ACK,
- /* Reception */
- NET_RCV_PROMISC,
- NET_CONNECT_STATUS,
- NET_MACADDR,
- NET_MACADDR_ACK,
-};
-
-/* Minimum eth data size */
-#define ETH_MIN_DATA_SIZE 46
-#define ETH_MIN_PACKET_SIZE (ETH_HLEN + ETH_MIN_DATA_SIZE)
-
-/* Maximum data size */
-#define VISOR_ETH_MAX_MTU 16384
-
-#ifndef MAX_MACADDR_LEN
-/* Number of bytes in MAC address */
-#define MAX_MACADDR_LEN 6
-#endif
-
-/* Various types of scsi task mgmt commands. */
-enum task_mgmt_types {
- TASK_MGMT_ABORT_TASK = 1,
- TASK_MGMT_BUS_RESET,
- TASK_MGMT_LUN_RESET,
- TASK_MGMT_TARGET_RESET,
-};
-
-/* Various types of vdisk mgmt commands. */
-enum vdisk_mgmt_types {
- VDISK_MGMT_ACQUIRE = 1,
- VDISK_MGMT_RELEASE,
-};
-
-struct phys_info {
- u64 pi_pfn;
- u16 pi_off;
- u16 pi_len;
-} __packed;
-
-#define MIN_NUMSIGNALS 64
-
-/* Structs with pragma pack. */
-
-struct guest_phys_info {
- u64 address;
- u64 length;
-} __packed;
-
-/*
- * struct uisscsi_dest
- * @channel: Bus number.
- * @id: Target number.
- * @lun: Logical unit number.
- */
-struct uisscsi_dest {
- u32 channel;
- u32 id;
- u32 lun;
-} __packed;
-
-struct vhba_wwnn {
- u32 wwnn1;
- u32 wwnn2;
-} __packed;
-
-/*
- * struct vhba_config_max
- * @max_channel: Maximum channel for devices attached to this bus.
- * @max_id: Maximum SCSI ID for devices attached to bus.
- * @max_lun: Maximum SCSI LUN for devices attached to bus.
- * @cmd_per_lun: Maximum number of outstanding commands per LUN.
- * @max_io_size: Maximum io size for devices attached to this bus. Max io size
- * is often determined by the resource of the hba.
- * e.g Max scatter gather list length * page size / sector size.
- *
- * WARNING: Values stored in this structure must contain maximum counts (not
- * maximum values).
- *
- * 20 bytes
- */
-struct vhba_config_max {
- u32 max_channel;
- u32 max_id;
- u32 max_lun;
- u32 cmd_per_lun;
- u32 max_io_size;
-} __packed;
-
-/*
- * struct uiscmdrsp_scsi
- *
- * @handle: The handle to the cmd that was received. Send it back as
- * is in the rsp packet.
- * @cmnd: The cdb for the command.
- * @bufflen: Length of data to be transferred out or in.
- * @guest_phys_entries: Number of entries in scatter-gather list.
- * @struct gpi_list: Physical address information for each fragment.
- * @data_dir: Direction of the data, if any.
- * @struct vdest: Identifies the virtual hba, id, channel, lun to which
- * cmd was sent.
- * @linuxstat: Original Linux status used by Linux vdisk.
- * @scsistat: The scsi status.
- * @addlstat: Non-scsi status.
- * @sensebuf: Sense info in case cmd failed. sensebuf holds the
- * sense_data struct. See sense_data struct for more
- * details.
- * @*vdisk: Pointer to the vdisk to clean up when IO completes.
- * @no_disk_result: Used to return no disk inquiry result when
- * no_disk_result is set to 1
- * scsi.scsistat is SAM_STAT_GOOD
- * scsi.addlstat is 0
- * scsi.linuxstat is SAM_STAT_GOOD
- * That is, there is NO error.
- */
-struct uiscmdrsp_scsi {
- u64 handle;
- u8 cmnd[MAX_CMND_SIZE];
- u32 bufflen;
- u16 guest_phys_entries;
- struct guest_phys_info gpi_list[MAX_PHYS_INFO];
- u32 data_dir;
- struct uisscsi_dest vdest;
- /* Needed to queue the rsp back to cmd originator. */
- int linuxstat;
- u8 scsistat;
- u8 addlstat;
-#define ADDL_SEL_TIMEOUT 4
- /* The following fields are need to determine the result of command. */
- u8 sensebuf[MAX_SENSE_SIZE];
- void *vdisk;
- int no_disk_result;
-} __packed;
-
-/*
- * Defines to support sending correct inquiry result when no disk is
- * configured.
- *
- * From SCSI SPC2 -
- *
- * If the target is not capable of supporting a device on this logical unit, the
- * device server shall set this field to 7Fh (PERIPHERAL QUALIFIER set to 011b
- * and PERIPHERAL DEVICE TYPE set to 1Fh).
- *
- * The device server is capable of supporting the specified peripheral device
- * type on this logical unit. However, the physical device is not currently
- * connected to this logical unit.
- */
-
-/*
- * Peripheral qualifier of 0x3
- * Peripheral type of 0x1f
- * Specifies no device but target present
- */
-#define DEV_NOT_CAPABLE 0x7f
-/*
- * Peripheral qualifier of 0x1
- * Peripheral type of 0 - disk
- * Specifies device capable, but not present
- */
-#define DEV_DISK_CAPABLE_NOT_PRESENT 0x20
-/* HiSup = 1; shows support for report luns must be returned for lun 0. */
-#define DEV_HISUPPORT 0x10
-
-/*
- * Peripheral qualifier of 0x3
- * Peripheral type of 0x1f
- * Specifies no device but target present
- */
-#define DEV_NOT_CAPABLE 0x7f
-/*
- * Peripheral qualifier of 0x1
- * Peripheral type of 0 - disk
- * Specifies device capable, but not present
- */
-#define DEV_DISK_CAPABLE_NOT_PRESENT 0x20
-/* HiSup = 1; shows support for report luns must be returned for lun 0. */
-#define DEV_HISUPPORT 0x10
-
-/*
- * NOTE: Linux code assumes inquiry contains 36 bytes. Without checking length
- * in buf[4] some Linux code accesses bytes beyond 5 to retrieve vendor, product
- * and revision. Yikes! So let us always send back 36 bytes, the minimum for
- * inquiry result.
- */
-#define NO_DISK_INQUIRY_RESULT_LEN 36
-/* 5 bytes minimum for inquiry result */
-#define MIN_INQUIRY_RESULT_LEN 5
-
-/* SCSI device version for no disk inquiry result */
-/* indicates SCSI SPC2 (SPC3 is 5) */
-#define SCSI_SPC2_VER 4
-
-/* Struct and Defines to support sense information. */
-
-/*
- * The following struct is returned in sensebuf field in uiscmdrsp_scsi. It is
- * initialized in exactly the manner that is recommended in Windows (hence the
- * odd values).
- * When set, these fields will have the following values:
- * ErrorCode = 0x70 indicates current error
- * Valid = 1 indicates sense info is valid
- * SenseKey contains sense key as defined by SCSI specs.
- * AdditionalSenseCode contains sense key as defined by SCSI specs.
- * AdditionalSenseCodeQualifier contains qualifier to sense code as defined by
- * scsi docs.
- * AdditionalSenseLength contains will be sizeof(sense_data)-8=10.
- */
-struct sense_data {
- u8 errorcode:7;
- u8 valid:1;
- u8 segment_number;
- u8 sense_key:4;
- u8 reserved:1;
- u8 incorrect_length:1;
- u8 end_of_media:1;
- u8 file_mark:1;
- u8 information[4];
- u8 additional_sense_length;
- u8 command_specific_information[4];
- u8 additional_sense_code;
- u8 additional_sense_code_qualifier;
- u8 fru_code;
- u8 sense_key_specific[3];
-} __packed;
-
-/*
- * struct net_pkt_xmt
- * @len: Full length of data in the packet.
- * @num_frags: Number of fragments in frags containing data.
- * @struct phys_info frags: Physical page information.
- * @ethhdr: The ethernet header.
- * @struct lincsum: These are needed for csum at uisnic end.
- * @valid: 1 = struct is valid - else ignore.
- * @hrawoffv: 1 = hwrafoff is valid.
- * @nhrawoffv: 1 = nhwrafoff is valid.
- * @protocol: Specifies packet protocol.
- * @csum: Value used to set skb->csum at IOPart.
- * @hrawoff: Value used to set skb->h.raw at IOPart. hrawoff points to
- * the start of the TRANSPORT LAYER HEADER.
- * @nhrawoff: Value used to set skb->nh.raw at IOPart. nhrawoff points to
- * the start of the NETWORK LAYER HEADER.
- *
- * NOTE:
- * The full packet is described in frags but the ethernet header is separately
- * kept in ethhdr so that uisnic doesn't have "MAP" the guest memory to get to
- * the header. uisnic needs ethhdr to determine how to route the packet.
- */
-struct net_pkt_xmt {
- int len;
- int num_frags;
- struct phys_info frags[MAX_PHYS_INFO];
- char ethhdr[ETH_HLEN];
- struct {
- u8 valid;
- u8 hrawoffv;
- u8 nhrawoffv;
- __be16 protocol;
- __wsum csum;
- u32 hrawoff;
- u32 nhrawoff;
- } lincsum;
-} __packed;
-
-struct net_pkt_xmtdone {
- /* Result of NET_XMIT */
- u32 xmt_done_result;
-} __packed;
-
-/*
- * RCVPOST_BUF_SIZE must be at most page_size(4096) - cache_line_size (64) The
- * reason is because dev_skb_alloc which is used to generate RCV_POST skbs in
- * visornic requires that there is "overhead" in the buffer, and pads 16 bytes.
- * Use 1 full cache line size for "overhead" so that transfers are optimized.
- * IOVM requires that a buffer be represented by 1 phys_info structure
- * which can only cover page_size.
- */
-#define RCVPOST_BUF_SIZE 4032
-#define MAX_NET_RCV_CHAIN \
- ((VISOR_ETH_MAX_MTU + ETH_HLEN + RCVPOST_BUF_SIZE - 1) \
- / RCVPOST_BUF_SIZE)
-
-/* rcv buf size must be large enough to include ethernet data len + ethernet
- * header len - we are choosing 2K because it is guaranteed to be describable.
- */
-struct net_pkt_rcvpost {
- /* Physical page information for the single fragment 2K rcv buf */
- struct phys_info frag;
- /*
- * Ensures that receive posts are returned to the adapter which we sent
- * them from originally.
- */
- u64 unique_num;
-
-} __packed;
-
-/*
- * struct net_pkt_rcv
- * @rcv_done_len: Length of the received data.
- * @numrcvbufs: Contains the incoming data. Guest side MUST chain these
- * together.
- * @*rcvbuf: List of chained rcvbufa. Each entry is a receive buffer
- * provided by NET_RCV_POST. NOTE: First rcvbuf in the
- * chain will also be provided in net.buf.
- * @unique_num:
- * @rcvs_dropped_delta:
- *
- * The number of rcvbuf that can be chained is based on max mtu and size of each
- * rcvbuf.
- */
-struct net_pkt_rcv {
- u32 rcv_done_len;
- u8 numrcvbufs;
- void *rcvbuf[MAX_NET_RCV_CHAIN];
- u64 unique_num;
- u32 rcvs_dropped_delta;
-} __packed;
-
-struct net_pkt_enbdis {
- void *context;
- /* 1 = enable, 0 = disable */
- u16 enable;
-} __packed;
-
-struct net_pkt_macaddr {
- void *context;
- /* 6 bytes */
- u8 macaddr[MAX_MACADDR_LEN];
-} __packed;
-
-/*
- * struct uiscmdrsp_net - cmd rsp packet used for VNIC network traffic.
- * @enum type:
- * @*buf:
- * @union:
- * @struct xmt: Used for NET_XMIT.
- * @struct xmtdone: Used for NET_XMIT_DONE.
- * @struct rcvpost: Used for NET_RCV_POST.
- * @struct rcv: Used for NET_RCV.
- * @struct enbdis: Used for NET_RCV_ENBDIS, NET_RCV_ENBDIS_ACK,
- * NET_RCV_PROMSIC, and NET_CONNECT_STATUS.
- * @struct macaddr:
- */
-struct uiscmdrsp_net {
- enum net_types type;
- void *buf;
- union {
- struct net_pkt_xmt xmt;
- struct net_pkt_xmtdone xmtdone;
- struct net_pkt_rcvpost rcvpost;
- struct net_pkt_rcv rcv;
- struct net_pkt_enbdis enbdis;
- struct net_pkt_macaddr macaddr;
- };
-} __packed;
-
-/*
- * struct uiscmdrsp_scsitaskmgmt
- * @enum tasktype: The type of task.
- * @struct vdest: The vdisk for which this task mgmt is generated.
- * @handle: This is a handle that the guest has saved off for its
- * own use. The handle value is preserved by iopart and
- * returned as in task mgmt rsp.
- * @notify_handle: For Linux guests, this is a pointer to wait_queue_head
- * that a thread is waiting on to see if the taskmgmt
- * command has completed. When the rsp is received by
- * guest, the thread receiving the response uses this to
- * notify the thread waiting for taskmgmt command
- * completion. It's value is preserved by iopart and
- * returned as in the task mgmt rsp.
- * @notifyresult_handle: This is a handle to the location in the guest where
- * the result of the taskmgmt command (result field) is
- * saved to when the response is handled. It's value is
- * preserved by iopart and returned as is in the task mgmt
- * rsp.
- * @result: Result of taskmgmt command - set by IOPart.
- */
-struct uiscmdrsp_scsitaskmgmt {
- enum task_mgmt_types tasktype;
- struct uisscsi_dest vdest;
- u64 handle;
- u64 notify_handle;
- u64 notifyresult_handle;
- char result;
-
-#define TASK_MGMT_FAILED 0
-} __packed;
-
-/*
- * struct uiscmdrsp_disknotify - Used by uissd to send disk add/remove
- * notifications to Guest.
- * @add: 0-remove, 1-add.
- * @*v_hba: Channel info to route msg.
- * @channel: SCSI Path of Disk to added or removed.
- * @id: SCSI Path of Disk to added or removed.
- * @lun: SCSI Path of Disk to added or removed.
- *
- * Note that the vHba pointer is not used by the Client/Guest side.
- */
-struct uiscmdrsp_disknotify {
- u8 add;
- void *v_hba;
- u32 channel, id, lun;
-} __packed;
-
-/* Keeping cmd and rsp info in one structure for now cmd rsp packet for SCSI */
-struct uiscmdrsp {
- char cmdtype;
- /* Describes what type of information is in the struct */
-#define CMD_SCSI_TYPE 1
-#define CMD_NET_TYPE 2
-#define CMD_SCSITASKMGMT_TYPE 3
-#define CMD_NOTIFYGUEST_TYPE 4
- union {
- struct uiscmdrsp_scsi scsi;
- struct uiscmdrsp_net net;
- struct uiscmdrsp_scsitaskmgmt scsitaskmgmt;
- struct uiscmdrsp_disknotify disknotify;
- };
- /* Send the response when the cmd is done (scsi and scsittaskmgmt). */
- void *private_data;
- /* General Purpose Queue Link */
- struct uiscmdrsp *next;
- /* Pointer to the nextactive commands */
- struct uiscmdrsp *activeQ_next;
- /* Pointer to the prevactive commands */
- struct uiscmdrsp *activeQ_prev;
-} __packed;
-
-/* total = 28 bytes */
-struct iochannel_vhba {
- /* 8 bytes */
- struct vhba_wwnn wwnn;
- /* 20 bytes */
- struct vhba_config_max max;
-} __packed;
-
-struct iochannel_vnic {
- /* 6 bytes */
- u8 macaddr[6];
- /* 4 bytes */
- u32 num_rcv_bufs;
- /* 4 bytes */
- u32 mtu;
- /* 16 bytes */
- guid_t zone_guid;
-} __packed;
-
-/*
- * This is just the header of the IO channel. It is assumed that directly after
- * this header there is a large region of memory which contains the command and
- * response queues as specified in cmd_q and rsp_q SIGNAL_QUEUE_HEADERS.
- */
-struct visor_io_channel {
- struct channel_header channel_header;
- struct signal_queue_header cmd_q;
- struct signal_queue_header rsp_q;
- union {
- struct iochannel_vhba vhba;
- struct iochannel_vnic vnic;
- } __packed;
-
-#define MAX_CLIENTSTRING_LEN 1024
- /* client_string is NULL termimated so holds max-1 bytes */
- u8 client_string[MAX_CLIENTSTRING_LEN];
-} __packed;
-
-/* INLINE functions for initializing and accessing I/O data channels. */
-#define SIZEOF_CMDRSP (64 * DIV_ROUND_UP(sizeof(struct uiscmdrsp), 64))
-
-/* Use 4K page sizes when passing page info between Guest and IOPartition. */
-#define PI_PAGE_SIZE 0x1000
-#define PI_PAGE_MASK 0x0FFF
-
-/* __IOCHANNEL_H__ */
-#endif
diff --git a/drivers/staging/unisys/visorhba/Kconfig b/drivers/staging/unisys/visorhba/Kconfig
deleted file mode 100644
index ed59ac11c3228da86c36c8345c51165bb119710d..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visorhba/Kconfig
+++ /dev/null
@@ -1,15 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Unisys visorhba configuration
-#
-
-config UNISYS_VISORHBA
- tristate "Unisys visorhba driver"
- depends on UNISYSSPAR && UNISYS_VISORBUS && SCSI
- help
- The Unisys visorhba driver provides support for s-Par HBA
- devices exposed on the s-Par visorbus. When a message is sent
- to visorbus to create a HBA device, the probe function of
- visorhba is called to create the scsi device.
- If you say Y here, you will enable the Unisys visorhba driver.
-
diff --git a/drivers/staging/unisys/visorhba/Makefile b/drivers/staging/unisys/visorhba/Makefile
deleted file mode 100644
index b613a7dcdae979dc69e1c1ca75b92eb772960ba9..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visorhba/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for Unisys channel
-#
-
-obj-$(CONFIG_UNISYS_VISORHBA) += visorhba.o
-
-visorhba-y := visorhba_main.o
-
-ccflags-y += -I $(srctree)/$(src)/../include
diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c b/drivers/staging/unisys/visorhba/visorhba_main.c
deleted file mode 100644
index 48aa18f8b984ce04374b125ca2a7f5401a358f17..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visorhba/visorhba_main.c
+++ /dev/null
@@ -1,1142 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (c) 2012 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-#include <linux/debugfs.h>
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/seq_file.h>
-#include <linux/visorbus.h>
-#include <linux/xarray.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-
-#include "iochannel.h"
-
-/* The Send and Receive Buffers of the IO Queue may both be full */
-
-#define IOS_ERROR_THRESHOLD 1000
-#define MAX_PENDING_REQUESTS (MIN_NUMSIGNALS * 2)
-#define VISORHBA_ERROR_COUNT 30
-
-static struct dentry *visorhba_debugfs_dir;
-
-/* GUIDS for HBA channel type supported by this driver */
-static struct visor_channeltype_descriptor visorhba_channel_types[] = {
- /* Note that the only channel type we expect to be reported by the
- * bus driver is the VISOR_VHBA channel.
- */
- { VISOR_VHBA_CHANNEL_GUID, "sparvhba", sizeof(struct channel_header),
- VISOR_VHBA_CHANNEL_VERSIONID },
- {}
-};
-
-MODULE_DEVICE_TABLE(visorbus, visorhba_channel_types);
-MODULE_ALIAS("visorbus:" VISOR_VHBA_CHANNEL_GUID_STR);
-
-struct visordisk_info {
- struct scsi_device *sdev;
- u32 valid;
- atomic_t ios_threshold;
- atomic_t error_count;
- struct visordisk_info *next;
-};
-
-struct scsipending {
- struct uiscmdrsp cmdrsp;
- /* The Data being tracked */
- void *sent;
- /* Type of pointer that is being stored */
- char cmdtype;
-};
-
-/* Each scsi_host has a host_data area that contains this struct. */
-struct visorhba_devdata {
- struct Scsi_Host *scsihost;
- struct visor_device *dev;
- struct list_head dev_info_list;
- /* Tracks the requests that have been forwarded to
- * the IOVM and haven't returned yet
- */
- struct scsipending pending[MAX_PENDING_REQUESTS];
- /* Start search for next pending free slot here */
- unsigned int nextinsert;
- /* lock to protect data in devdata */
- spinlock_t privlock;
- bool serverdown;
- bool serverchangingstate;
- unsigned long long acquire_failed_cnt;
- unsigned long long interrupts_rcvd;
- unsigned long long interrupts_notme;
- unsigned long long interrupts_disabled;
- u64 __iomem *flags_addr;
- struct visordisk_info head;
- unsigned int max_buff_len;
- int devnum;
- struct uiscmdrsp *cmdrsp;
- /*
- * allows us to pass int handles back-and-forth between us and
- * iovm, instead of raw pointers
- */
- struct xarray xa;
- struct dentry *debugfs_dir;
- struct dentry *debugfs_info;
-};
-
-struct visorhba_devices_open {
- struct visorhba_devdata *devdata;
-};
-
-/*
- * add_scsipending_entry - Save off io command that is pending in
- * Service Partition
- * @devdata: Pointer to devdata
- * @cmdtype: Specifies the type of command pending
- * @new: The command to be saved
- *
- * Saves off the io command that is being handled by the Service
- * Partition so that it can be handled when it completes. If new is
- * NULL it is assumed the entry refers only to the cmdrsp.
- *
- * Return: Insert_location where entry was added on success,
- * -EBUSY if it can't
- */
-static int add_scsipending_entry(struct visorhba_devdata *devdata,
- char cmdtype, void *new)
-{
- unsigned long flags;
- struct scsipending *entry;
- int insert_location;
-
- spin_lock_irqsave(&devdata->privlock, flags);
- insert_location = devdata->nextinsert;
- while (devdata->pending[insert_location].sent) {
- insert_location = (insert_location + 1) % MAX_PENDING_REQUESTS;
- if (insert_location == (int)devdata->nextinsert) {
- spin_unlock_irqrestore(&devdata->privlock, flags);
- return -EBUSY;
- }
- }
-
- entry = &devdata->pending[insert_location];
- memset(&entry->cmdrsp, 0, sizeof(entry->cmdrsp));
- entry->cmdtype = cmdtype;
- if (new)
- entry->sent = new;
- /* wants to send cmdrsp */
- else
- entry->sent = &entry->cmdrsp;
- devdata->nextinsert = (insert_location + 1) % MAX_PENDING_REQUESTS;
- spin_unlock_irqrestore(&devdata->privlock, flags);
-
- return insert_location;
-}
-
-/*
- * del_scsipending_ent - Removes an entry from the pending array
- * @devdata: Device holding the pending array
- * @del: Entry to remove
- *
- * Removes the entry pointed at by del and returns it.
- *
- * Return: The scsipending entry pointed to on success, NULL on failure
- */
-static void *del_scsipending_ent(struct visorhba_devdata *devdata, int del)
-{
- unsigned long flags;
- void *sent;
-
- if (del >= MAX_PENDING_REQUESTS)
- return NULL;
-
- spin_lock_irqsave(&devdata->privlock, flags);
- sent = devdata->pending[del].sent;
- devdata->pending[del].cmdtype = 0;
- devdata->pending[del].sent = NULL;
- spin_unlock_irqrestore(&devdata->privlock, flags);
-
- return sent;
-}
-
-/*
- * get_scsipending_cmdrsp - Return the cmdrsp stored in a pending entry
- * @ddata: Device holding the pending array
- * @ent: Entry that stores the cmdrsp
- *
- * Each scsipending entry has a cmdrsp in it. The cmdrsp is only valid
- * if the "sent" field is not NULL.
- *
- * Return: A pointer to the cmdrsp, NULL on failure
- */
-static struct uiscmdrsp *get_scsipending_cmdrsp(struct visorhba_devdata *ddata,
- int ent)
-{
- if (ddata->pending[ent].sent)
- return &ddata->pending[ent].cmdrsp;
-
- return NULL;
-}
-
-/*
- * setup_scsitaskmgmt_handles - Stash the necessary handles so that the
- * completion processing logic for a taskmgmt
- * cmd will be able to find who to wake up
- * and where to stash the result
- * @xa: The data object maintaining the pointer<-->int mappings
- * @cmdrsp: Response from the IOVM
- * @event: The event handle to associate with an id
- * @result: The location to place the result of the event handle into
- */
-static int setup_scsitaskmgmt_handles(struct xarray *xa, struct uiscmdrsp *cmdrsp,
- wait_queue_head_t *event, int *result)
-{
- int ret;
- u32 id;
-
- /* specify the event that has to be triggered when this cmd is complete */
- ret = xa_alloc_irq(xa, &id, event, xa_limit_32b, GFP_KERNEL);
- if (ret)
- return ret;
- cmdrsp->scsitaskmgmt.notify_handle = id;
- ret = xa_alloc_irq(xa, &id, result, xa_limit_32b, GFP_KERNEL);
- if (ret) {
- xa_erase_irq(xa, cmdrsp->scsitaskmgmt.notify_handle);
- return ret;
- }
- cmdrsp->scsitaskmgmt.notifyresult_handle = id;
-
- return 0;
-}
-
-/*
- * cleanup_scsitaskmgmt_handles - Forget handles created by
- * setup_scsitaskmgmt_handles()
- * @xa: The data object maintaining the pointer<-->int mappings
- * @cmdrsp: Response from the IOVM
- */
-static void cleanup_scsitaskmgmt_handles(struct xarray *xa,
- struct uiscmdrsp *cmdrsp)
-{
- xa_erase_irq(xa, cmdrsp->scsitaskmgmt.notify_handle);
- xa_erase_irq(xa, cmdrsp->scsitaskmgmt.notifyresult_handle);
-}
-
-/*
- * forward_taskmgmt_command - Send taskmegmt command to the Service
- * Partition
- * @tasktype: Type of taskmgmt command
- * @scsidev: Scsidev that issued command
- *
- * Create a cmdrsp packet and send it to the Service Partition
- * that will service this request.
- *
- * Return: Int representing whether command was queued successfully or not
- */
-static int forward_taskmgmt_command(enum task_mgmt_types tasktype,
- struct scsi_device *scsidev)
-{
- struct uiscmdrsp *cmdrsp;
- struct visorhba_devdata *devdata =
- (struct visorhba_devdata *)scsidev->host->hostdata;
- int notifyresult = 0xffff;
- wait_queue_head_t notifyevent;
- int scsicmd_id;
- int ret;
-
- if (devdata->serverdown || devdata->serverchangingstate)
- return FAILED;
-
- scsicmd_id = add_scsipending_entry(devdata, CMD_SCSITASKMGMT_TYPE,
- NULL);
- if (scsicmd_id < 0)
- return FAILED;
-
- cmdrsp = get_scsipending_cmdrsp(devdata, scsicmd_id);
-
- init_waitqueue_head(¬ifyevent);
-
- /* issue TASK_MGMT_ABORT_TASK */
- cmdrsp->cmdtype = CMD_SCSITASKMGMT_TYPE;
-
- ret = setup_scsitaskmgmt_handles(&devdata->xa, cmdrsp,
- ¬ifyevent, ¬ifyresult);
- if (ret) {
- dev_dbg(&scsidev->sdev_gendev,
- "visorhba: setup_scsitaskmgmt_handles returned %d\n", ret);
- return FAILED;
- }
-
- /* save destination */
- cmdrsp->scsitaskmgmt.tasktype = tasktype;
- cmdrsp->scsitaskmgmt.vdest.channel = scsidev->channel;
- cmdrsp->scsitaskmgmt.vdest.id = scsidev->id;
- cmdrsp->scsitaskmgmt.vdest.lun = scsidev->lun;
- cmdrsp->scsitaskmgmt.handle = scsicmd_id;
-
- dev_dbg(&scsidev->sdev_gendev,
- "visorhba: initiating type=%d taskmgmt command\n", tasktype);
- if (visorchannel_signalinsert(devdata->dev->visorchannel,
- IOCHAN_TO_IOPART,
- cmdrsp))
- goto err_del_scsipending_ent;
-
- /* It can take the Service Partition up to 35 seconds to complete
- * an IO in some cases, so wait 45 seconds and error out
- */
- if (!wait_event_timeout(notifyevent, notifyresult != 0xffff,
- msecs_to_jiffies(45000)))
- goto err_del_scsipending_ent;
-
- dev_dbg(&scsidev->sdev_gendev,
- "visorhba: taskmgmt type=%d success; result=0x%x\n",
- tasktype, notifyresult);
- cleanup_scsitaskmgmt_handles(&devdata->xa, cmdrsp);
- return SUCCESS;
-
-err_del_scsipending_ent:
- dev_dbg(&scsidev->sdev_gendev,
- "visorhba: taskmgmt type=%d not executed\n", tasktype);
- del_scsipending_ent(devdata, scsicmd_id);
- cleanup_scsitaskmgmt_handles(&devdata->xa, cmdrsp);
- return FAILED;
-}
-
-/*
- * visorhba_abort_handler - Send TASK_MGMT_ABORT_TASK
- * @scsicmd: The scsicmd that needs aborted
- *
- * Return: SUCCESS if inserted, FAILED otherwise
- */
-static int visorhba_abort_handler(struct scsi_cmnd *scsicmd)
-{
- /* issue TASK_MGMT_ABORT_TASK */
- struct scsi_device *scsidev;
- struct visordisk_info *vdisk;
- int rtn;
-
- scsidev = scsicmd->device;
- vdisk = scsidev->hostdata;
- if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT)
- atomic_inc(&vdisk->error_count);
- else
- atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD);
- rtn = forward_taskmgmt_command(TASK_MGMT_ABORT_TASK, scsidev);
- if (rtn == SUCCESS) {
- scsicmd->result = DID_ABORT << 16;
- scsi_done(scsicmd);
- }
- return rtn;
-}
-
-/*
- * visorhba_device_reset_handler - Send TASK_MGMT_LUN_RESET
- * @scsicmd: The scsicmd that needs aborted
- *
- * Return: SUCCESS if inserted, FAILED otherwise
- */
-static int visorhba_device_reset_handler(struct scsi_cmnd *scsicmd)
-{
- /* issue TASK_MGMT_LUN_RESET */
- struct scsi_device *scsidev;
- struct visordisk_info *vdisk;
- int rtn;
-
- scsidev = scsicmd->device;
- vdisk = scsidev->hostdata;
- if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT)
- atomic_inc(&vdisk->error_count);
- else
- atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD);
- rtn = forward_taskmgmt_command(TASK_MGMT_LUN_RESET, scsidev);
- if (rtn == SUCCESS) {
- scsicmd->result = DID_RESET << 16;
- scsi_done(scsicmd);
- }
- return rtn;
-}
-
-/*
- * visorhba_bus_reset_handler - Send TASK_MGMT_TARGET_RESET for each
- * target on the bus
- * @scsicmd: The scsicmd that needs aborted
- *
- * Return: SUCCESS if inserted, FAILED otherwise
- */
-static int visorhba_bus_reset_handler(struct scsi_cmnd *scsicmd)
-{
- struct scsi_device *scsidev;
- struct visordisk_info *vdisk;
- int rtn;
-
- scsidev = scsicmd->device;
- shost_for_each_device(scsidev, scsidev->host) {
- vdisk = scsidev->hostdata;
- if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT)
- atomic_inc(&vdisk->error_count);
- else
- atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD);
- }
- rtn = forward_taskmgmt_command(TASK_MGMT_BUS_RESET, scsidev);
- if (rtn == SUCCESS) {
- scsicmd->result = DID_RESET << 16;
- scsi_done(scsicmd);
- }
- return rtn;
-}
-
-/*
- * visorhba_host_reset_handler - Not supported
- * @scsicmd: The scsicmd that needs to be aborted
- *
- * Return: Not supported, return SUCCESS
- */
-static int visorhba_host_reset_handler(struct scsi_cmnd *scsicmd)
-{
- /* issue TASK_MGMT_TARGET_RESET for each target on each bus for host */
- return SUCCESS;
-}
-
-/*
- * visorhba_get_info - Get information about SCSI device
- * @shp: Scsi host that is requesting information
- *
- * Return: String with visorhba information
- */
-static const char *visorhba_get_info(struct Scsi_Host *shp)
-{
- /* Return version string */
- return "visorhba";
-}
-
-/*
- * dma_data_dir_linux_to_spar - convert dma_data_direction value to
- * Unisys-specific equivalent
- * @d: dma direction value to convert
- *
- * Returns the Unisys-specific dma direction value corresponding to @d
- */
-static u32 dma_data_dir_linux_to_spar(enum dma_data_direction d)
-{
- switch (d) {
- case DMA_BIDIRECTIONAL:
- return UIS_DMA_BIDIRECTIONAL;
- case DMA_TO_DEVICE:
- return UIS_DMA_TO_DEVICE;
- case DMA_FROM_DEVICE:
- return UIS_DMA_FROM_DEVICE;
- case DMA_NONE:
- return UIS_DMA_NONE;
- default:
- return UIS_DMA_NONE;
- }
-}
-
-/*
- * visorhba_queue_command_lck - Queues command to the Service Partition
- * @scsicmd: Command to be queued
- * @vsiorhba_cmnd_done: Done command to call when scsicmd is returned
- *
- * Queues to scsicmd to the ServicePartition after converting it to a
- * uiscmdrsp structure.
- *
- * Return: 0 if successfully queued to the Service Partition, otherwise
- * error code
- */
-static int visorhba_queue_command_lck(struct scsi_cmnd *scsicmd)
-{
- void (*visorhba_cmnd_done)(struct scsi_cmnd *) = scsi_done;
- struct uiscmdrsp *cmdrsp;
- struct scsi_device *scsidev = scsicmd->device;
- int insert_location;
- unsigned char *cdb = scsicmd->cmnd;
- struct Scsi_Host *scsihost = scsidev->host;
- unsigned int i;
- struct visorhba_devdata *devdata =
- (struct visorhba_devdata *)scsihost->hostdata;
- struct scatterlist *sg = NULL;
- struct scatterlist *sglist = NULL;
-
- if (devdata->serverdown || devdata->serverchangingstate)
- return SCSI_MLQUEUE_DEVICE_BUSY;
-
- insert_location = add_scsipending_entry(devdata, CMD_SCSI_TYPE,
- (void *)scsicmd);
- if (insert_location < 0)
- return SCSI_MLQUEUE_DEVICE_BUSY;
-
- cmdrsp = get_scsipending_cmdrsp(devdata, insert_location);
- cmdrsp->cmdtype = CMD_SCSI_TYPE;
- /* save the pending insertion location. Deletion from pending
- * will return the scsicmd pointer for completion
- */
- cmdrsp->scsi.handle = insert_location;
-
- WARN_ON_ONCE(visorhba_cmnd_done != scsi_done);
- /* save destination */
- cmdrsp->scsi.vdest.channel = scsidev->channel;
- cmdrsp->scsi.vdest.id = scsidev->id;
- cmdrsp->scsi.vdest.lun = scsidev->lun;
- /* save datadir */
- cmdrsp->scsi.data_dir =
- dma_data_dir_linux_to_spar(scsicmd->sc_data_direction);
- memcpy(cmdrsp->scsi.cmnd, cdb, MAX_CMND_SIZE);
- cmdrsp->scsi.bufflen = scsi_bufflen(scsicmd);
-
- /* keep track of the max buffer length so far. */
- if (cmdrsp->scsi.bufflen > devdata->max_buff_len)
- devdata->max_buff_len = cmdrsp->scsi.bufflen;
-
- if (scsi_sg_count(scsicmd) > MAX_PHYS_INFO)
- goto err_del_scsipending_ent;
-
- /* convert buffer to phys information */
- /* buffer is scatterlist - copy it out */
- sglist = scsi_sglist(scsicmd);
-
- for_each_sg(sglist, sg, scsi_sg_count(scsicmd), i) {
- cmdrsp->scsi.gpi_list[i].address = sg_phys(sg);
- cmdrsp->scsi.gpi_list[i].length = sg->length;
- }
- cmdrsp->scsi.guest_phys_entries = scsi_sg_count(scsicmd);
-
- if (visorchannel_signalinsert(devdata->dev->visorchannel,
- IOCHAN_TO_IOPART,
- cmdrsp))
- /* queue must be full and we aren't going to wait */
- goto err_del_scsipending_ent;
-
- return 0;
-
-err_del_scsipending_ent:
- del_scsipending_ent(devdata, insert_location);
- return SCSI_MLQUEUE_DEVICE_BUSY;
-}
-
-#ifdef DEF_SCSI_QCMD
-static DEF_SCSI_QCMD(visorhba_queue_command)
-#else
-#define visorhba_queue_command visorhba_queue_command_lck
-#endif
-
-/*
- * visorhba_slave_alloc - Called when new disk is discovered
- * @scsidev: New disk
- *
- * Create a new visordisk_info structure and add it to our
- * list of vdisks.
- *
- * Return: 0 on success, -ENOMEM on failure.
- */
-static int visorhba_slave_alloc(struct scsi_device *scsidev)
-{
- /* this is called by the midlayer before scan for new devices --
- * LLD can alloc any struct & do init if needed.
- */
- struct visordisk_info *vdisk;
- struct visorhba_devdata *devdata;
- struct Scsi_Host *scsihost = (struct Scsi_Host *)scsidev->host;
-
- /* already allocated return success */
- if (scsidev->hostdata)
- return 0;
-
- /* even though we errored, treat as success */
- devdata = (struct visorhba_devdata *)scsihost->hostdata;
- if (!devdata)
- return 0;
-
- vdisk = kzalloc(sizeof(*vdisk), GFP_ATOMIC);
- if (!vdisk)
- return -ENOMEM;
-
- vdisk->sdev = scsidev;
- scsidev->hostdata = vdisk;
- return 0;
-}
-
-/*
- * visorhba_slave_destroy - Disk is going away, clean up resources.
- * @scsidev: Scsi device to destroy
- */
-static void visorhba_slave_destroy(struct scsi_device *scsidev)
-{
- /* midlevel calls this after device has been quiesced and
- * before it is to be deleted.
- */
- struct visordisk_info *vdisk;
-
- vdisk = scsidev->hostdata;
- scsidev->hostdata = NULL;
- kfree(vdisk);
-}
-
-static struct scsi_host_template visorhba_driver_template = {
- .name = "Unisys Visor HBA",
- .info = visorhba_get_info,
- .queuecommand = visorhba_queue_command,
- .eh_abort_handler = visorhba_abort_handler,
- .eh_device_reset_handler = visorhba_device_reset_handler,
- .eh_bus_reset_handler = visorhba_bus_reset_handler,
- .eh_host_reset_handler = visorhba_host_reset_handler,
-#define visorhba_MAX_CMNDS 128
- .can_queue = visorhba_MAX_CMNDS,
- .sg_tablesize = 64,
- .this_id = -1,
- .slave_alloc = visorhba_slave_alloc,
- .slave_destroy = visorhba_slave_destroy,
-};
-
-/*
- * info_debugfs_show - Debugfs interface to dump visorhba states
- * @seq: The sequence file to write information to
- * @v: Unused, but needed for use with seq file single_open invocation
- *
- * Presents a file in the debugfs tree named: /visorhba/vbus<x>:dev<y>/info.
- *
- * Return: SUCCESS
- */
-static int info_debugfs_show(struct seq_file *seq, void *v)
-{
- struct visorhba_devdata *devdata = seq->private;
-
- seq_printf(seq, "max_buff_len = %u\n", devdata->max_buff_len);
- seq_printf(seq, "interrupts_rcvd = %llu\n", devdata->interrupts_rcvd);
- seq_printf(seq, "interrupts_disabled = %llu\n",
- devdata->interrupts_disabled);
- seq_printf(seq, "interrupts_notme = %llu\n",
- devdata->interrupts_notme);
- seq_printf(seq, "flags_addr = %p\n", devdata->flags_addr);
- if (devdata->flags_addr) {
- u64 phys_flags_addr =
- virt_to_phys((__force void *)devdata->flags_addr);
- seq_printf(seq, "phys_flags_addr = 0x%016llx\n",
- phys_flags_addr);
- seq_printf(seq, "FeatureFlags = %llu\n",
- (u64)readq(devdata->flags_addr));
- }
- seq_printf(seq, "acquire_failed_cnt = %llu\n",
- devdata->acquire_failed_cnt);
-
- return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(info_debugfs);
-
-/*
- * complete_taskmgmt_command - Complete task management
- * @idrtable: The data object maintaining the pointer<-->int mappings
- * @cmdrsp: Response from the IOVM
- * @result: The result of the task management command
- *
- * Service Partition returned the result of the task management
- * command. Wake up anyone waiting for it.
- */
-static void complete_taskmgmt_command(struct xarray *xa,
- struct uiscmdrsp *cmdrsp, int result)
-{
- wait_queue_head_t *wq =
- xa_load(xa, cmdrsp->scsitaskmgmt.notify_handle);
- int *scsi_result_ptr =
- xa_load(xa, cmdrsp->scsitaskmgmt.notifyresult_handle);
- if (unlikely(!(wq && scsi_result_ptr))) {
- pr_err("visorhba: no completion context; cmd will time out\n");
- return;
- }
-
- /* copy the result of the taskmgmt and
- * wake up the error handler that is waiting for this
- */
- pr_debug("visorhba: notifying initiator with result=0x%x\n", result);
- *scsi_result_ptr = result;
- wake_up_all(wq);
-}
-
-/*
- * visorhba_serverdown_complete - Called when we are done cleaning up
- * from serverdown
- * @devdata: Visorhba instance on which to complete serverdown
- *
- * Called when we are done cleanning up from serverdown, stop processing
- * queue, fail pending IOs.
- */
-static void visorhba_serverdown_complete(struct visorhba_devdata *devdata)
-{
- int i;
- struct scsipending *pendingdel = NULL;
- struct scsi_cmnd *scsicmd = NULL;
- struct uiscmdrsp *cmdrsp;
- unsigned long flags;
-
- /* Stop using the IOVM response queue (queue should be drained
- * by the end)
- */
- visorbus_disable_channel_interrupts(devdata->dev);
-
- /* Fail commands that weren't completed */
- spin_lock_irqsave(&devdata->privlock, flags);
- for (i = 0; i < MAX_PENDING_REQUESTS; i++) {
- pendingdel = &devdata->pending[i];
- switch (pendingdel->cmdtype) {
- case CMD_SCSI_TYPE:
- scsicmd = pendingdel->sent;
- scsicmd->result = DID_RESET << 16;
- scsi_done(scsicmd);
- break;
- case CMD_SCSITASKMGMT_TYPE:
- cmdrsp = pendingdel->sent;
- complete_taskmgmt_command(&devdata->xa, cmdrsp,
- TASK_MGMT_FAILED);
- break;
- default:
- break;
- }
- pendingdel->cmdtype = 0;
- pendingdel->sent = NULL;
- }
- spin_unlock_irqrestore(&devdata->privlock, flags);
-
- devdata->serverdown = true;
- devdata->serverchangingstate = false;
-}
-
-/*
- * visorhba_serverdown - Got notified that the IOVM is down
- * @devdata: Visorhba that is being serviced by downed IOVM
- *
- * Something happened to the IOVM, return immediately and
- * schedule cleanup work.
- *
- * Return: 0 on success, -EINVAL on failure
- */
-static int visorhba_serverdown(struct visorhba_devdata *devdata)
-{
- if (!devdata->serverdown && !devdata->serverchangingstate) {
- devdata->serverchangingstate = true;
- visorhba_serverdown_complete(devdata);
- } else if (devdata->serverchangingstate) {
- return -EINVAL;
- }
- return 0;
-}
-
-/*
- * do_scsi_linuxstat - Scsi command returned linuxstat
- * @cmdrsp: Response from IOVM
- * @scsicmd: Command issued
- *
- * Don't log errors for disk-not-present inquiries.
- */
-static void do_scsi_linuxstat(struct uiscmdrsp *cmdrsp,
- struct scsi_cmnd *scsicmd)
-{
- struct visordisk_info *vdisk;
- struct scsi_device *scsidev;
-
- scsidev = scsicmd->device;
- memcpy(scsicmd->sense_buffer, cmdrsp->scsi.sensebuf, MAX_SENSE_SIZE);
-
- /* Do not log errors for disk-not-present inquiries */
- if (cmdrsp->scsi.cmnd[0] == INQUIRY &&
- (host_byte(cmdrsp->scsi.linuxstat) == DID_NO_CONNECT) &&
- cmdrsp->scsi.addlstat == ADDL_SEL_TIMEOUT)
- return;
- /* Okay see what our error_count is here.... */
- vdisk = scsidev->hostdata;
- if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) {
- atomic_inc(&vdisk->error_count);
- atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD);
- }
-}
-
-static int set_no_disk_inquiry_result(unsigned char *buf, size_t len,
- bool is_lun0)
-{
- if (len < NO_DISK_INQUIRY_RESULT_LEN)
- return -EINVAL;
- memset(buf, 0, NO_DISK_INQUIRY_RESULT_LEN);
- buf[2] = SCSI_SPC2_VER;
- if (is_lun0) {
- buf[0] = DEV_DISK_CAPABLE_NOT_PRESENT;
- buf[3] = DEV_HISUPPORT;
- } else {
- buf[0] = DEV_NOT_CAPABLE;
- }
- buf[4] = NO_DISK_INQUIRY_RESULT_LEN - 5;
- strncpy(buf + 8, "DELLPSEUDO DEVICE .", NO_DISK_INQUIRY_RESULT_LEN - 8);
- return 0;
-}
-
-/*
- * do_scsi_nolinuxstat - Scsi command didn't have linuxstat
- * @cmdrsp: Response from IOVM
- * @scsicmd: Command issued
- *
- * Handle response when no linuxstat was returned.
- */
-static void do_scsi_nolinuxstat(struct uiscmdrsp *cmdrsp,
- struct scsi_cmnd *scsicmd)
-{
- struct scsi_device *scsidev;
- unsigned char *buf;
- struct scatterlist *sg;
- unsigned int i;
- char *this_page;
- char *this_page_orig;
- int bufind = 0;
- struct visordisk_info *vdisk;
-
- scsidev = scsicmd->device;
- if (cmdrsp->scsi.cmnd[0] == INQUIRY &&
- cmdrsp->scsi.bufflen >= MIN_INQUIRY_RESULT_LEN) {
- if (cmdrsp->scsi.no_disk_result == 0)
- return;
-
- buf = kzalloc(36, GFP_KERNEL);
- if (!buf)
- return;
-
- /* Linux scsi code wants a device at Lun 0
- * to issue report luns, but we don't want
- * a disk there so we'll present a processor
- * there.
- */
- set_no_disk_inquiry_result(buf, (size_t)cmdrsp->scsi.bufflen,
- scsidev->lun == 0);
-
- if (scsi_sg_count(scsicmd) == 0) {
- memcpy(scsi_sglist(scsicmd), buf,
- cmdrsp->scsi.bufflen);
- kfree(buf);
- return;
- }
-
- scsi_for_each_sg(scsicmd, sg, scsi_sg_count(scsicmd), i) {
- this_page_orig = kmap_atomic(sg_page(sg));
- this_page = (void *)((unsigned long)this_page_orig |
- sg->offset);
- memcpy(this_page, buf + bufind, sg->length);
- kunmap_atomic(this_page_orig);
- }
- kfree(buf);
- } else {
- vdisk = scsidev->hostdata;
- if (atomic_read(&vdisk->ios_threshold) > 0) {
- atomic_dec(&vdisk->ios_threshold);
- if (atomic_read(&vdisk->ios_threshold) == 0)
- atomic_set(&vdisk->error_count, 0);
- }
- }
-}
-
-/*
- * complete_scsi_command - Complete a scsi command
- * @uiscmdrsp: Response from Service Partition
- * @scsicmd: The scsi command
- *
- * Response was returned by the Service Partition. Finish it and send
- * completion to the scsi midlayer.
- */
-static void complete_scsi_command(struct uiscmdrsp *cmdrsp,
- struct scsi_cmnd *scsicmd)
-{
- /* take what we need out of cmdrsp and complete the scsicmd */
- scsicmd->result = cmdrsp->scsi.linuxstat;
- if (cmdrsp->scsi.linuxstat)
- do_scsi_linuxstat(cmdrsp, scsicmd);
- else
- do_scsi_nolinuxstat(cmdrsp, scsicmd);
-
- scsi_done(scsicmd);
-}
-
-/*
- * drain_queue - Pull responses out of iochannel
- * @cmdrsp: Response from the IOSP
- * @devdata: Device that owns this iochannel
- *
- * Pulls responses out of the iochannel and process the responses.
- */
-static void drain_queue(struct uiscmdrsp *cmdrsp,
- struct visorhba_devdata *devdata)
-{
- struct scsi_cmnd *scsicmd;
-
- while (1) {
- /* queue empty */
- if (visorchannel_signalremove(devdata->dev->visorchannel,
- IOCHAN_FROM_IOPART,
- cmdrsp))
- break;
- if (cmdrsp->cmdtype == CMD_SCSI_TYPE) {
- /* scsicmd location is returned by the
- * deletion
- */
- scsicmd = del_scsipending_ent(devdata,
- cmdrsp->scsi.handle);
- if (!scsicmd)
- break;
- /* complete the orig cmd */
- complete_scsi_command(cmdrsp, scsicmd);
- } else if (cmdrsp->cmdtype == CMD_SCSITASKMGMT_TYPE) {
- if (!del_scsipending_ent(devdata,
- cmdrsp->scsitaskmgmt.handle))
- break;
- complete_taskmgmt_command(&devdata->xa, cmdrsp,
- cmdrsp->scsitaskmgmt.result);
- } else if (cmdrsp->cmdtype == CMD_NOTIFYGUEST_TYPE)
- dev_err_once(&devdata->dev->device,
- "ignoring unsupported NOTIFYGUEST\n");
- /* cmdrsp is now available for re-use */
- }
-}
-
-/*
- * This is used only when this driver is active as an hba driver in the
- * client guest partition. It is called periodically so we can obtain
- * and process the command respond from the IO Service Partition periodically.
- */
-static void visorhba_channel_interrupt(struct visor_device *dev)
-{
- struct visorhba_devdata *devdata = dev_get_drvdata(&dev->device);
-
- if (!devdata)
- return;
-
- drain_queue(devdata->cmdrsp, devdata);
-}
-
-/*
- * visorhba_pause - Function to handle visorbus pause messages
- * @dev: Device that is pausing
- * @complete_func: Function to call when finished
- *
- * Something has happened to the IO Service Partition that is
- * handling this device. Quiet this device and reset commands
- * so that the Service Partition can be corrected.
- *
- * Return: SUCCESS
- */
-static int visorhba_pause(struct visor_device *dev,
- visorbus_state_complete_func complete_func)
-{
- struct visorhba_devdata *devdata = dev_get_drvdata(&dev->device);
-
- visorhba_serverdown(devdata);
- complete_func(dev, 0);
- return 0;
-}
-
-/*
- * visorhba_resume - Function called when the IO Service Partition is back
- * @dev: Device that is pausing
- * @complete_func: Function to call when finished
- *
- * Yay! The IO Service Partition is back, the channel has been wiped
- * so lets re-establish connection and start processing responses.
- *
- * Return: 0 on success, -EINVAL on failure
- */
-static int visorhba_resume(struct visor_device *dev,
- visorbus_state_complete_func complete_func)
-{
- struct visorhba_devdata *devdata;
-
- devdata = dev_get_drvdata(&dev->device);
- if (!devdata)
- return -EINVAL;
-
- if (devdata->serverdown && !devdata->serverchangingstate)
- devdata->serverchangingstate = true;
-
- visorbus_enable_channel_interrupts(dev);
- devdata->serverdown = false;
- devdata->serverchangingstate = false;
-
- return 0;
-}
-
-/*
- * visorhba_probe - Device has been discovered; do acquire
- * @dev: visor_device that was discovered
- *
- * A new HBA was discovered; do the initial connections of it.
- *
- * Return: 0 on success, otherwise error code
- */
-static int visorhba_probe(struct visor_device *dev)
-{
- struct Scsi_Host *scsihost;
- struct vhba_config_max max;
- struct visorhba_devdata *devdata = NULL;
- int err, channel_offset;
- u64 features;
-
- scsihost = scsi_host_alloc(&visorhba_driver_template,
- sizeof(*devdata));
- if (!scsihost)
- return -ENODEV;
-
- channel_offset = offsetof(struct visor_io_channel, vhba.max);
- err = visorbus_read_channel(dev, channel_offset, &max,
- sizeof(struct vhba_config_max));
- if (err < 0)
- goto err_scsi_host_put;
-
- scsihost->max_id = (unsigned int)max.max_id;
- scsihost->max_lun = (unsigned int)max.max_lun;
- scsihost->cmd_per_lun = (unsigned int)max.cmd_per_lun;
- scsihost->max_sectors =
- (unsigned short)(max.max_io_size >> 9);
- scsihost->sg_tablesize =
- (unsigned short)(max.max_io_size / PAGE_SIZE);
- if (scsihost->sg_tablesize > MAX_PHYS_INFO)
- scsihost->sg_tablesize = MAX_PHYS_INFO;
- err = scsi_add_host(scsihost, &dev->device);
- if (err < 0)
- goto err_scsi_host_put;
-
- devdata = (struct visorhba_devdata *)scsihost->hostdata;
- devdata->dev = dev;
- dev_set_drvdata(&dev->device, devdata);
-
- devdata->debugfs_dir = debugfs_create_dir(dev_name(&dev->device),
- visorhba_debugfs_dir);
- if (!devdata->debugfs_dir) {
- err = -ENOMEM;
- goto err_scsi_remove_host;
- }
- devdata->debugfs_info =
- debugfs_create_file("info", 0440,
- devdata->debugfs_dir, devdata,
- &info_debugfs_fops);
- if (!devdata->debugfs_info) {
- err = -ENOMEM;
- goto err_debugfs_dir;
- }
-
- spin_lock_init(&devdata->privlock);
- devdata->serverdown = false;
- devdata->serverchangingstate = false;
- devdata->scsihost = scsihost;
-
- channel_offset = offsetof(struct visor_io_channel,
- channel_header.features);
- err = visorbus_read_channel(dev, channel_offset, &features, 8);
- if (err)
- goto err_debugfs_info;
- features |= VISOR_CHANNEL_IS_POLLING;
- err = visorbus_write_channel(dev, channel_offset, &features, 8);
- if (err)
- goto err_debugfs_info;
-
- xa_init(&devdata->xa);
-
- devdata->cmdrsp = kmalloc(sizeof(*devdata->cmdrsp), GFP_ATOMIC);
- visorbus_enable_channel_interrupts(dev);
-
- scsi_scan_host(scsihost);
-
- return 0;
-
-err_debugfs_info:
- debugfs_remove(devdata->debugfs_info);
-
-err_debugfs_dir:
- debugfs_remove_recursive(devdata->debugfs_dir);
-
-err_scsi_remove_host:
- scsi_remove_host(scsihost);
-
-err_scsi_host_put:
- scsi_host_put(scsihost);
- return err;
-}
-
-/*
- * visorhba_remove - Remove a visorhba device
- * @dev: Device to remove
- *
- * Removes the visorhba device.
- */
-static void visorhba_remove(struct visor_device *dev)
-{
- struct visorhba_devdata *devdata = dev_get_drvdata(&dev->device);
- struct Scsi_Host *scsihost = NULL;
-
- if (!devdata)
- return;
-
- scsihost = devdata->scsihost;
- kfree(devdata->cmdrsp);
- visorbus_disable_channel_interrupts(dev);
- scsi_remove_host(scsihost);
- scsi_host_put(scsihost);
-
- dev_set_drvdata(&dev->device, NULL);
- debugfs_remove(devdata->debugfs_info);
- debugfs_remove_recursive(devdata->debugfs_dir);
-}
-
-/* This is used to tell the visorbus driver which types of visor devices
- * we support, and what functions to call when a visor device that we support
- * is attached or removed.
- */
-static struct visor_driver visorhba_driver = {
- .name = "visorhba",
- .owner = THIS_MODULE,
- .channel_types = visorhba_channel_types,
- .probe = visorhba_probe,
- .remove = visorhba_remove,
- .pause = visorhba_pause,
- .resume = visorhba_resume,
- .channel_interrupt = visorhba_channel_interrupt,
-};
-
-/*
- * visorhba_init - Driver init routine
- *
- * Initialize the visorhba driver and register it with visorbus
- * to handle s-Par virtual host bus adapter.
- *
- * Return: 0 on success, error code otherwise
- */
-static int visorhba_init(void)
-{
- int rc;
-
- visorhba_debugfs_dir = debugfs_create_dir("visorhba", NULL);
- if (!visorhba_debugfs_dir)
- return -ENOMEM;
-
- rc = visorbus_register_visor_driver(&visorhba_driver);
- if (rc)
- goto cleanup_debugfs;
-
- return 0;
-
-cleanup_debugfs:
- debugfs_remove_recursive(visorhba_debugfs_dir);
-
- return rc;
-}
-
-/*
- * visorhba_exit - Driver exit routine
- *
- * Unregister driver from the bus and free up memory.
- */
-static void visorhba_exit(void)
-{
- visorbus_unregister_visor_driver(&visorhba_driver);
- debugfs_remove_recursive(visorhba_debugfs_dir);
-}
-
-module_init(visorhba_init);
-module_exit(visorhba_exit);
-
-MODULE_AUTHOR("Unisys");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("s-Par HBA driver for virtual SCSI host busses");
diff --git a/drivers/staging/unisys/visorinput/Kconfig b/drivers/staging/unisys/visorinput/Kconfig
deleted file mode 100644
index 5f036393aee97481c6c6cec81dfd68ad3014fbea..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visorinput/Kconfig
+++ /dev/null
@@ -1,16 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Unisys visorinput configuration
-#
-
-config UNISYS_VISORINPUT
- tristate "Unisys visorinput driver"
- depends on UNISYSSPAR && UNISYS_VISORBUS && INPUT
- help
- The Unisys s-Par visorinput driver provides a virtualized system
- console (keyboard and mouse) that is accessible through the
- s-Par firmware's user interface. s-Par provides video using the EFI
- GOP protocol, so If this driver is not present, the Linux guest should
- still boot with visible output in the partition desktop, but keyboard
- and mouse interaction will not be available.
-
diff --git a/drivers/staging/unisys/visorinput/Makefile b/drivers/staging/unisys/visorinput/Makefile
deleted file mode 100644
index 68ced7c8a65fd8e269a6d8612435087707969a3a..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visorinput/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for Unisys visorinput
-#
-
-obj-$(CONFIG_UNISYS_VISORINPUT) += visorinput.o
-
diff --git a/drivers/staging/unisys/visorinput/visorinput.c b/drivers/staging/unisys/visorinput/visorinput.c
deleted file mode 100644
index dffa71ac3cc5ecf0267c7411e340537f767d3225..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visorinput/visorinput.c
+++ /dev/null
@@ -1,788 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2011 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-/*
- * This driver lives in a generic guest Linux partition, and registers to
- * receive keyboard and mouse channels from the visorbus driver. It reads
- * inputs from such channels, and delivers it to the Linux OS in the
- * standard way the Linux expects for input drivers.
- */
-
-#include <linux/fb.h>
-#include <linux/input.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/uuid.h>
-#include <linux/visorbus.h>
-
-/* These defines identify mouse and keyboard activity which is specified by the
- * firmware to the host using the cmsimpleinput protocol. @ingroup coretypes
- */
-/* only motion; arg1=x, arg2=y */
-#define INPUTACTION_XY_MOTION 1
-
-/* arg1: 1=left,2=center,3=right */
-#define INPUTACTION_MOUSE_BUTTON_DOWN 2
-#define INPUTACTION_MOUSE_BUTTON_UP 3
-#define INPUTACTION_MOUSE_BUTTON_CLICK 4
-#define INPUTACTION_MOUSE_BUTTON_DCLICK 5
-
-/* arg1: wheel rotation away from/toward user */
-#define INPUTACTION_WHEEL_ROTATE_AWAY 6
-#define INPUTACTION_WHEEL_ROTATE_TOWARD 7
-
-/* arg1: scancode, as follows: If arg1 <= 0xff, it's a 1-byte scancode and arg1
- * is that scancode. If arg1 > 0xff, it's a 2-byte scanecode, with the 1st
- * byte in the low 8 bits, and the 2nd byte in the high 8 bits.
- * E.g., the right ALT key would appear as x'38e0'.
- */
-#define INPUTACTION_KEY_DOWN 64
-#define INPUTACTION_KEY_UP 65
-#define INPUTACTION_KEY_DOWN_UP 67
-
-/* arg1: scancode (in same format as inputaction_keyDown); MUST refer to one of
- * the locking keys, like capslock, numlock, or scrolllock.
- * arg2: 1 iff locking key should be in the LOCKED position (e.g., light is ON)
- */
-#define INPUTACTION_SET_LOCKING_KEY_STATE 66
-
-/* Keyboard channel {c73416d0-b0b8-44af-b304-9d2ae99f1b3d} */
-#define VISOR_KEYBOARD_CHANNEL_GUID \
- GUID_INIT(0xc73416d0, 0xb0b8, 0x44af, \
- 0xb3, 0x4, 0x9d, 0x2a, 0xe9, 0x9f, 0x1b, 0x3d)
-#define VISOR_KEYBOARD_CHANNEL_GUID_STR "c73416d0-b0b8-44af-b304-9d2ae99f1b3d"
-
-/* Mouse channel {addf07d4-94a9-46e2-81c3-61abcdbdbd87} */
-#define VISOR_MOUSE_CHANNEL_GUID \
- GUID_INIT(0xaddf07d4, 0x94a9, 0x46e2, \
- 0x81, 0xc3, 0x61, 0xab, 0xcd, 0xbd, 0xbd, 0x87)
-#define VISOR_MOUSE_CHANNEL_GUID_STR "addf07d4-94a9-46e2-81c3-61abcdbdbd87"
-
-#define PIXELS_ACROSS_DEFAULT 1024
-#define PIXELS_DOWN_DEFAULT 768
-#define KEYCODE_TABLE_BYTES 256
-
-struct visor_inputactivity {
- u16 action;
- u16 arg1;
- u16 arg2;
- u16 arg3;
-} __packed;
-
-struct visor_inputreport {
- u64 seq_no;
- struct visor_inputactivity activity;
-} __packed;
-
-/* header of keyboard/mouse channels */
-struct visor_input_channel_data {
- u32 n_input_reports;
- union {
- struct {
- u16 x_res;
- u16 y_res;
- } mouse;
- struct {
- u32 flags;
- } keyboard;
- };
-} __packed;
-
-enum visorinput_dev_type {
- visorinput_keyboard,
- visorinput_mouse,
-};
-
-/*
- * This is the private data that we store for each device. A pointer to this
- * struct is maintained via dev_get_drvdata() / dev_set_drvdata() for each
- * struct device.
- */
-struct visorinput_devdata {
- struct visor_device *dev;
- /* lock for dev */
- struct mutex lock_visor_dev;
- struct input_dev *visorinput_dev;
- bool paused;
- bool interrupts_enabled;
- /* size of following array */
- unsigned int keycode_table_bytes;
- /* for keyboard devices: visorkbd_keycode[] + visorkbd_ext_keycode[] */
- unsigned char keycode_table[];
-};
-
-static const guid_t visor_keyboard_channel_guid = VISOR_KEYBOARD_CHANNEL_GUID;
-static const guid_t visor_mouse_channel_guid = VISOR_MOUSE_CHANNEL_GUID;
-
-/*
- * Borrowed from drivers/input/keyboard/atakbd.c
- * This maps 1-byte scancodes to keycodes.
- */
-static const unsigned char visorkbd_keycode[KEYCODE_TABLE_BYTES] = {
- /* American layout */
- [0] = KEY_GRAVE,
- [1] = KEY_ESC,
- [2] = KEY_1,
- [3] = KEY_2,
- [4] = KEY_3,
- [5] = KEY_4,
- [6] = KEY_5,
- [7] = KEY_6,
- [8] = KEY_7,
- [9] = KEY_8,
- [10] = KEY_9,
- [11] = KEY_0,
- [12] = KEY_MINUS,
- [13] = KEY_EQUAL,
- [14] = KEY_BACKSPACE,
- [15] = KEY_TAB,
- [16] = KEY_Q,
- [17] = KEY_W,
- [18] = KEY_E,
- [19] = KEY_R,
- [20] = KEY_T,
- [21] = KEY_Y,
- [22] = KEY_U,
- [23] = KEY_I,
- [24] = KEY_O,
- [25] = KEY_P,
- [26] = KEY_LEFTBRACE,
- [27] = KEY_RIGHTBRACE,
- [28] = KEY_ENTER,
- [29] = KEY_LEFTCTRL,
- [30] = KEY_A,
- [31] = KEY_S,
- [32] = KEY_D,
- [33] = KEY_F,
- [34] = KEY_G,
- [35] = KEY_H,
- [36] = KEY_J,
- [37] = KEY_K,
- [38] = KEY_L,
- [39] = KEY_SEMICOLON,
- [40] = KEY_APOSTROPHE,
- [41] = KEY_GRAVE,
- [42] = KEY_LEFTSHIFT,
- [43] = KEY_BACKSLASH,
- [44] = KEY_Z,
- [45] = KEY_X,
- [46] = KEY_C,
- [47] = KEY_V,
- [48] = KEY_B,
- [49] = KEY_N,
- [50] = KEY_M,
- [51] = KEY_COMMA,
- [52] = KEY_DOT,
- [53] = KEY_SLASH,
- [54] = KEY_RIGHTSHIFT,
- [55] = KEY_KPASTERISK,
- [56] = KEY_LEFTALT,
- [57] = KEY_SPACE,
- [58] = KEY_CAPSLOCK,
- [59] = KEY_F1,
- [60] = KEY_F2,
- [61] = KEY_F3,
- [62] = KEY_F4,
- [63] = KEY_F5,
- [64] = KEY_F6,
- [65] = KEY_F7,
- [66] = KEY_F8,
- [67] = KEY_F9,
- [68] = KEY_F10,
- [69] = KEY_NUMLOCK,
- [70] = KEY_SCROLLLOCK,
- [71] = KEY_KP7,
- [72] = KEY_KP8,
- [73] = KEY_KP9,
- [74] = KEY_KPMINUS,
- [75] = KEY_KP4,
- [76] = KEY_KP5,
- [77] = KEY_KP6,
- [78] = KEY_KPPLUS,
- [79] = KEY_KP1,
- [80] = KEY_KP2,
- [81] = KEY_KP3,
- [82] = KEY_KP0,
- [83] = KEY_KPDOT,
- /* enables UK backslash+pipe key and FR lessthan+greaterthan key */
- [86] = KEY_102ND,
- [87] = KEY_F11,
- [88] = KEY_F12,
- [90] = KEY_KPLEFTPAREN,
- [91] = KEY_KPRIGHTPAREN,
- [92] = KEY_KPASTERISK,
- [93] = KEY_KPASTERISK,
- [94] = KEY_KPPLUS,
- [95] = KEY_HELP,
- [96] = KEY_KPENTER,
- [97] = KEY_RIGHTCTRL,
- [98] = KEY_KPSLASH,
- [99] = KEY_KPLEFTPAREN,
- [100] = KEY_KPRIGHTPAREN,
- [101] = KEY_KPSLASH,
- [102] = KEY_HOME,
- [103] = KEY_UP,
- [104] = KEY_PAGEUP,
- [105] = KEY_LEFT,
- [106] = KEY_RIGHT,
- [107] = KEY_END,
- [108] = KEY_DOWN,
- [109] = KEY_PAGEDOWN,
- [110] = KEY_INSERT,
- [111] = KEY_DELETE,
- [112] = KEY_MACRO,
- [113] = KEY_MUTE
-};
-
-/*
- * This maps the <xx> in extended scancodes of the form "0xE0 <xx>" into
- * keycodes.
- */
-static const unsigned char visorkbd_ext_keycode[KEYCODE_TABLE_BYTES] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
- 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
- 0, 0, 0, 0, KEY_KPENTER, KEY_RIGHTCTRL, 0, 0, /* 0x18 */
- 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
- KEY_RIGHTALT, 0, 0, 0, 0, 0, 0, 0, /* 0x28 */
- 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 */
- KEY_RIGHTALT /* AltGr */, 0, 0, 0, 0, 0, 0, 0, /* 0x38 */
- 0, 0, 0, 0, 0, 0, 0, KEY_HOME, /* 0x40 */
- KEY_UP, KEY_PAGEUP, 0, KEY_LEFT, 0, KEY_RIGHT, 0, KEY_END, /* 0x48 */
- KEY_DOWN, KEY_PAGEDOWN, KEY_INSERT, KEY_DELETE, 0, 0, 0, 0, /* 0x50 */
- 0, 0, 0, 0, 0, 0, 0, 0, /* 0x58 */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
-};
-
-static int visorinput_open(struct input_dev *visorinput_dev)
-{
- struct visorinput_devdata *devdata = input_get_drvdata(visorinput_dev);
-
- if (!devdata) {
- dev_err(&visorinput_dev->dev,
- "%s input_get_drvdata(%p) returned NULL\n",
- __func__, visorinput_dev);
- return -EINVAL;
- }
- dev_dbg(&visorinput_dev->dev, "%s opened\n", __func__);
-
- /*
- * If we're not paused, really enable interrupts. Regardless of whether
- * we are paused, set a flag indicating interrupts should be enabled so
- * when we resume, interrupts will really be enabled.
- */
- mutex_lock(&devdata->lock_visor_dev);
- devdata->interrupts_enabled = true;
- if (devdata->paused)
- goto out_unlock;
- visorbus_enable_channel_interrupts(devdata->dev);
-
-out_unlock:
- mutex_unlock(&devdata->lock_visor_dev);
- return 0;
-}
-
-static void visorinput_close(struct input_dev *visorinput_dev)
-{
- struct visorinput_devdata *devdata = input_get_drvdata(visorinput_dev);
-
- if (!devdata) {
- dev_err(&visorinput_dev->dev,
- "%s input_get_drvdata(%p) returned NULL\n",
- __func__, visorinput_dev);
- return;
- }
- dev_dbg(&visorinput_dev->dev, "%s closed\n", __func__);
-
- /*
- * If we're not paused, really disable interrupts. Regardless of
- * whether we are paused, set a flag indicating interrupts should be
- * disabled so when we resume we will not re-enable them.
- */
- mutex_lock(&devdata->lock_visor_dev);
- devdata->interrupts_enabled = false;
- if (devdata->paused)
- goto out_unlock;
- visorbus_disable_channel_interrupts(devdata->dev);
-
-out_unlock:
- mutex_unlock(&devdata->lock_visor_dev);
-}
-
-/*
- * setup_client_keyboard() initializes and returns a Linux input node that we
- * can use to deliver keyboard inputs to Linux. We of course do this when we
- * see keyboard inputs coming in on a keyboard channel.
- */
-static struct input_dev *setup_client_keyboard(void *devdata,
- unsigned char *keycode_table)
-
-{
- int i;
- struct input_dev *visorinput_dev = input_allocate_device();
-
- if (!visorinput_dev)
- return NULL;
-
- visorinput_dev->name = "visor Keyboard";
- visorinput_dev->phys = "visorkbd:input0";
- visorinput_dev->id.bustype = BUS_VIRTUAL;
- visorinput_dev->id.vendor = 0x0001;
- visorinput_dev->id.product = 0x0001;
- visorinput_dev->id.version = 0x0100;
-
- visorinput_dev->evbit[0] = BIT_MASK(EV_KEY) |
- BIT_MASK(EV_REP) |
- BIT_MASK(EV_LED);
- visorinput_dev->ledbit[0] = BIT_MASK(LED_CAPSL) |
- BIT_MASK(LED_SCROLLL) |
- BIT_MASK(LED_NUML);
- visorinput_dev->keycode = keycode_table;
- /* sizeof(unsigned char) */
- visorinput_dev->keycodesize = 1;
- visorinput_dev->keycodemax = KEYCODE_TABLE_BYTES;
-
- for (i = 1; i < visorinput_dev->keycodemax; i++)
- set_bit(keycode_table[i], visorinput_dev->keybit);
- for (i = 1; i < visorinput_dev->keycodemax; i++)
- set_bit(keycode_table[i + KEYCODE_TABLE_BYTES],
- visorinput_dev->keybit);
-
- visorinput_dev->open = visorinput_open;
- visorinput_dev->close = visorinput_close;
- /* pre input_register! */
- input_set_drvdata(visorinput_dev, devdata);
-
- return visorinput_dev;
-}
-
-static struct input_dev *setup_client_mouse(void *devdata, unsigned int xres,
- unsigned int yres)
-{
- struct input_dev *visorinput_dev = input_allocate_device();
-
- if (!visorinput_dev)
- return NULL;
-
- visorinput_dev->name = "visor Mouse";
- visorinput_dev->phys = "visormou:input0";
- visorinput_dev->id.bustype = BUS_VIRTUAL;
- visorinput_dev->id.vendor = 0x0001;
- visorinput_dev->id.product = 0x0002;
- visorinput_dev->id.version = 0x0100;
-
- visorinput_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
- set_bit(BTN_LEFT, visorinput_dev->keybit);
- set_bit(BTN_RIGHT, visorinput_dev->keybit);
- set_bit(BTN_MIDDLE, visorinput_dev->keybit);
-
- if (xres == 0)
- xres = PIXELS_ACROSS_DEFAULT;
- if (yres == 0)
- yres = PIXELS_DOWN_DEFAULT;
- input_set_abs_params(visorinput_dev, ABS_X, 0, xres, 0, 0);
- input_set_abs_params(visorinput_dev, ABS_Y, 0, yres, 0, 0);
-
- visorinput_dev->open = visorinput_open;
- visorinput_dev->close = visorinput_close;
- /* pre input_register! */
- input_set_drvdata(visorinput_dev, devdata);
- input_set_capability(visorinput_dev, EV_REL, REL_WHEEL);
-
- return visorinput_dev;
-}
-
-static struct visorinput_devdata *devdata_create(struct visor_device *dev,
- enum visorinput_dev_type dtype)
-{
- struct visorinput_devdata *devdata = NULL;
- unsigned int extra_bytes = 0;
- unsigned int size, xres, yres, err;
- struct visor_input_channel_data data;
-
- if (dtype == visorinput_keyboard)
- /* allocate room for devdata->keycode_table, filled in below */
- extra_bytes = KEYCODE_TABLE_BYTES * 2;
- devdata = kzalloc(struct_size(devdata, keycode_table, extra_bytes),
- GFP_KERNEL);
- if (!devdata)
- return NULL;
- mutex_init(&devdata->lock_visor_dev);
- mutex_lock(&devdata->lock_visor_dev);
- devdata->dev = dev;
-
- /*
- * visorinput_open() can be called as soon as input_register_device()
- * happens, and that will enable channel interrupts. Setting paused
- * prevents us from getting into visorinput_channel_interrupt() prior
- * to the device structure being totally initialized.
- */
- devdata->paused = true;
-
- /*
- * This is an input device in a client guest partition, so we need to
- * create whatever input nodes are necessary to deliver our inputs to
- * the guest OS.
- */
- switch (dtype) {
- case visorinput_keyboard:
- devdata->keycode_table_bytes = extra_bytes;
- memcpy(devdata->keycode_table, visorkbd_keycode,
- KEYCODE_TABLE_BYTES);
- memcpy(devdata->keycode_table + KEYCODE_TABLE_BYTES,
- visorkbd_ext_keycode, KEYCODE_TABLE_BYTES);
- devdata->visorinput_dev = setup_client_keyboard
- (devdata, devdata->keycode_table);
- if (!devdata->visorinput_dev)
- goto cleanups_register;
- break;
- case visorinput_mouse:
- size = sizeof(struct visor_input_channel_data);
- err = visorbus_read_channel(dev, sizeof(struct channel_header),
- &data, size);
- if (err)
- goto cleanups_register;
- xres = data.mouse.x_res;
- yres = data.mouse.y_res;
- devdata->visorinput_dev = setup_client_mouse(devdata, xres,
- yres);
- if (!devdata->visorinput_dev)
- goto cleanups_register;
- break;
- default:
- /* No other input devices supported */
- break;
- }
-
- dev_set_drvdata(&dev->device, devdata);
- mutex_unlock(&devdata->lock_visor_dev);
-
- /*
- * Device struct is completely set up now, with the exception of
- * visorinput_dev being registered. We need to unlock before we
- * register the device, because this can cause an on-stack call of
- * visorinput_open(), which would deadlock if we had the lock.
- */
- if (input_register_device(devdata->visorinput_dev)) {
- input_free_device(devdata->visorinput_dev);
- goto err_kfree_devdata;
- }
-
- mutex_lock(&devdata->lock_visor_dev);
- /*
- * Establish calls to visorinput_channel_interrupt() if that is the
- * desired state that we've kept track of in interrupts_enabled while
- * the device was being created.
- */
- devdata->paused = false;
- if (devdata->interrupts_enabled)
- visorbus_enable_channel_interrupts(dev);
- mutex_unlock(&devdata->lock_visor_dev);
-
- return devdata;
-
-cleanups_register:
- mutex_unlock(&devdata->lock_visor_dev);
-err_kfree_devdata:
- kfree(devdata);
- return NULL;
-}
-
-static int visorinput_probe(struct visor_device *dev)
-{
- const guid_t *guid;
- enum visorinput_dev_type dtype;
-
- guid = visorchannel_get_guid(dev->visorchannel);
- if (guid_equal(guid, &visor_mouse_channel_guid))
- dtype = visorinput_mouse;
- else if (guid_equal(guid, &visor_keyboard_channel_guid))
- dtype = visorinput_keyboard;
- else
- return -ENODEV;
- visorbus_disable_channel_interrupts(dev);
- if (!devdata_create(dev, dtype))
- return -ENOMEM;
- return 0;
-}
-
-static void unregister_client_input(struct input_dev *visorinput_dev)
-{
- if (visorinput_dev)
- input_unregister_device(visorinput_dev);
-}
-
-static void visorinput_remove(struct visor_device *dev)
-{
- struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device);
-
- if (!devdata)
- return;
-
- mutex_lock(&devdata->lock_visor_dev);
- visorbus_disable_channel_interrupts(dev);
-
- /*
- * due to above, at this time no thread of execution will be in
- * visorinput_channel_interrupt()
- */
-
- dev_set_drvdata(&dev->device, NULL);
- mutex_unlock(&devdata->lock_visor_dev);
-
- unregister_client_input(devdata->visorinput_dev);
- kfree(devdata);
-}
-
-/*
- * Make it so the current locking state of the locking key indicated by
- * <keycode> is as indicated by <desired_state> (1=locked, 0=unlocked).
- */
-static void handle_locking_key(struct input_dev *visorinput_dev, int keycode,
- int desired_state)
-{
- int led;
-
- switch (keycode) {
- case KEY_CAPSLOCK:
- led = LED_CAPSL;
- break;
- case KEY_SCROLLLOCK:
- led = LED_SCROLLL;
- break;
- case KEY_NUMLOCK:
- led = LED_NUML;
- break;
- default:
- return;
- }
- if (test_bit(led, visorinput_dev->led) != desired_state) {
- input_report_key(visorinput_dev, keycode, 1);
- input_sync(visorinput_dev);
- input_report_key(visorinput_dev, keycode, 0);
- input_sync(visorinput_dev);
- __change_bit(led, visorinput_dev->led);
- }
-}
-
-/*
- * <scancode> is either a 1-byte scancode, or an extended 16-bit scancode with
- * 0xE0 in the low byte and the extended scancode value in the next higher byte.
- */
-static int scancode_to_keycode(int scancode)
-{
- if (scancode > 0xff)
- return visorkbd_ext_keycode[(scancode >> 8) & 0xff];
-
- return visorkbd_keycode[scancode];
-}
-
-static int calc_button(int x)
-{
- switch (x) {
- case 1:
- return BTN_LEFT;
- case 2:
- return BTN_MIDDLE;
- case 3:
- return BTN_RIGHT;
- default:
- return -EINVAL;
- }
-}
-
-/*
- * This is used only when this driver is active as an input driver in the
- * client guest partition. It is called periodically so we can obtain inputs
- * from the channel, and deliver them to the guest OS.
- */
-static void visorinput_channel_interrupt(struct visor_device *dev)
-{
- struct visor_inputreport r;
- int scancode, keycode;
- struct input_dev *visorinput_dev;
- int xmotion, ymotion, button;
- int i;
- struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device);
-
- if (!devdata)
- return;
-
- visorinput_dev = devdata->visorinput_dev;
-
- while (!visorchannel_signalremove(dev->visorchannel, 0, &r)) {
- scancode = r.activity.arg1;
- keycode = scancode_to_keycode(scancode);
- switch (r.activity.action) {
- case INPUTACTION_KEY_DOWN:
- input_report_key(visorinput_dev, keycode, 1);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_KEY_UP:
- input_report_key(visorinput_dev, keycode, 0);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_KEY_DOWN_UP:
- input_report_key(visorinput_dev, keycode, 1);
- input_sync(visorinput_dev);
- input_report_key(visorinput_dev, keycode, 0);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_SET_LOCKING_KEY_STATE:
- handle_locking_key(visorinput_dev, keycode,
- r.activity.arg2);
- break;
- case INPUTACTION_XY_MOTION:
- xmotion = r.activity.arg1;
- ymotion = r.activity.arg2;
- input_report_abs(visorinput_dev, ABS_X, xmotion);
- input_report_abs(visorinput_dev, ABS_Y, ymotion);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_MOUSE_BUTTON_DOWN:
- button = calc_button(r.activity.arg1);
- if (button < 0)
- break;
- input_report_key(visorinput_dev, button, 1);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_MOUSE_BUTTON_UP:
- button = calc_button(r.activity.arg1);
- if (button < 0)
- break;
- input_report_key(visorinput_dev, button, 0);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_MOUSE_BUTTON_CLICK:
- button = calc_button(r.activity.arg1);
- if (button < 0)
- break;
- input_report_key(visorinput_dev, button, 1);
- input_sync(visorinput_dev);
- input_report_key(visorinput_dev, button, 0);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_MOUSE_BUTTON_DCLICK:
- button = calc_button(r.activity.arg1);
- if (button < 0)
- break;
- for (i = 0; i < 2; i++) {
- input_report_key(visorinput_dev, button, 1);
- input_sync(visorinput_dev);
- input_report_key(visorinput_dev, button, 0);
- input_sync(visorinput_dev);
- }
- break;
- case INPUTACTION_WHEEL_ROTATE_AWAY:
- input_report_rel(visorinput_dev, REL_WHEEL, 1);
- input_sync(visorinput_dev);
- break;
- case INPUTACTION_WHEEL_ROTATE_TOWARD:
- input_report_rel(visorinput_dev, REL_WHEEL, -1);
- input_sync(visorinput_dev);
- break;
- default:
- /* Unsupported input action */
- break;
- }
- }
-}
-
-static int visorinput_pause(struct visor_device *dev,
- visorbus_state_complete_func complete_func)
-{
- int rc;
- struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device);
-
- if (!devdata) {
- rc = -ENODEV;
- goto out;
- }
-
- mutex_lock(&devdata->lock_visor_dev);
- if (devdata->paused) {
- rc = -EBUSY;
- goto out_locked;
- }
- if (devdata->interrupts_enabled)
- visorbus_disable_channel_interrupts(dev);
-
- /*
- * due to above, at this time no thread of execution will be in
- * visorinput_channel_interrupt()
- */
- devdata->paused = true;
- complete_func(dev, 0);
- rc = 0;
-out_locked:
- mutex_unlock(&devdata->lock_visor_dev);
-out:
- return rc;
-}
-
-static int visorinput_resume(struct visor_device *dev,
- visorbus_state_complete_func complete_func)
-{
- int rc;
- struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device);
-
- if (!devdata) {
- rc = -ENODEV;
- goto out;
- }
- mutex_lock(&devdata->lock_visor_dev);
- if (!devdata->paused) {
- rc = -EBUSY;
- goto out_locked;
- }
- devdata->paused = false;
- complete_func(dev, 0);
-
- /*
- * Re-establish calls to visorinput_channel_interrupt() if that is the
- * desired state that we've kept track of in interrupts_enabled while
- * the device was paused.
- */
- if (devdata->interrupts_enabled)
- visorbus_enable_channel_interrupts(dev);
-
- rc = 0;
-out_locked:
- mutex_unlock(&devdata->lock_visor_dev);
-out:
- return rc;
-}
-
-/* GUIDS for all channel types supported by this driver. */
-static struct visor_channeltype_descriptor visorinput_channel_types[] = {
- { VISOR_KEYBOARD_CHANNEL_GUID, "keyboard",
- sizeof(struct channel_header), 0 },
- { VISOR_MOUSE_CHANNEL_GUID, "mouse", sizeof(struct channel_header), 0 },
- {}
-};
-
-static struct visor_driver visorinput_driver = {
- .name = "visorinput",
- .owner = THIS_MODULE,
- .channel_types = visorinput_channel_types,
- .probe = visorinput_probe,
- .remove = visorinput_remove,
- .channel_interrupt = visorinput_channel_interrupt,
- .pause = visorinput_pause,
- .resume = visorinput_resume,
-};
-
-module_driver(visorinput_driver, visorbus_register_visor_driver,
- visorbus_unregister_visor_driver);
-
-MODULE_DEVICE_TABLE(visorbus, visorinput_channel_types);
-
-MODULE_AUTHOR("Unisys");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("s-Par human input driver for virtual keyboard/mouse");
-
-MODULE_ALIAS("visorbus:" VISOR_MOUSE_CHANNEL_GUID_STR);
-MODULE_ALIAS("visorbus:" VISOR_KEYBOARD_CHANNEL_GUID_STR);
diff --git a/drivers/staging/unisys/visornic/Kconfig b/drivers/staging/unisys/visornic/Kconfig
deleted file mode 100644
index 3f8f5570821bfd2e1a3e328ed6db99d428556ede..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visornic/Kconfig
+++ /dev/null
@@ -1,16 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Unisys visornic configuration
-#
-
-config UNISYS_VISORNIC
- tristate "Unisys visornic driver"
- depends on UNISYSSPAR && UNISYS_VISORBUS && NET
- help
- The Unisys Visornic driver provides support for s-Par network
- devices exposed on the s-Par visorbus. When a message is sent
- to visorbus to create a network device, the probe function of
- visornic is called to create the netdev device. Networking on
- s-Par switches will not work if this driver is not selected.
- If you say Y here, you will enable the Unisys visornic driver.
-
diff --git a/drivers/staging/unisys/visornic/Makefile b/drivers/staging/unisys/visornic/Makefile
deleted file mode 100644
index f2984880c3401d2c88ce9d5f7335c463b65086f2..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visornic/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for Unisys channel
-#
-
-obj-$(CONFIG_UNISYS_VISORNIC) += visornic.o
-
-visornic-y := visornic_main.o
-
-ccflags-y += -I $(srctree)/$(src)/../include
diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c
deleted file mode 100644
index bb7ec492503e1cd22a9445a5625ce82cffe6cd48..0000000000000000000000000000000000000000
--- a/drivers/staging/unisys/visornic/visornic_main.c
+++ /dev/null
@@ -1,2131 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright (c) 2012 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-/* This driver lives in a spar partition, and registers to ethernet io
- * channels from the visorbus driver. It creates netdev devices and
- * forwards transmit to the IO channel and accepts rcvs from the IO
- * Partition via the IO channel.
- */
-
-#include <linux/debugfs.h>
-#include <linux/etherdevice.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/kthread.h>
-#include <linux/skbuff.h>
-#include <linux/rtnetlink.h>
-#include <linux/visorbus.h>
-
-#include "iochannel.h"
-
-#define VISORNIC_INFINITE_RSP_WAIT 0
-
-/* MAX_BUF = 64 lines x 32 MAXVNIC x 80 characters
- * = 163840 bytes
- */
-#define MAX_BUF 163840
-#define NAPI_WEIGHT 64
-
-/* GUIDS for director channel type supported by this driver. */
-/* {8cd5994d-c58e-11da-95a9-00e08161165f} */
-#define VISOR_VNIC_CHANNEL_GUID \
- GUID_INIT(0x8cd5994d, 0xc58e, 0x11da, \
- 0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
-#define VISOR_VNIC_CHANNEL_GUID_STR \
- "8cd5994d-c58e-11da-95a9-00e08161165f"
-
-static struct visor_channeltype_descriptor visornic_channel_types[] = {
- /* Note that the only channel type we expect to be reported by the
- * bus driver is the VISOR_VNIC channel.
- */
- { VISOR_VNIC_CHANNEL_GUID, "ultravnic", sizeof(struct channel_header),
- VISOR_VNIC_CHANNEL_VERSIONID },
- {}
-};
-MODULE_DEVICE_TABLE(visorbus, visornic_channel_types);
-/* FIXME XXX: This next line of code must be fixed and removed before
- * acceptance into the 'normal' part of the kernel. It is only here as a place
- * holder to get module autoloading functionality working for visorbus. Code
- * must be added to scripts/mode/file2alias.c, etc., to get this working
- * properly.
- */
-MODULE_ALIAS("visorbus:" VISOR_VNIC_CHANNEL_GUID_STR);
-
-struct chanstat {
- unsigned long got_rcv;
- unsigned long got_enbdisack;
- unsigned long got_xmit_done;
- unsigned long xmit_fail;
- unsigned long sent_enbdis;
- unsigned long sent_promisc;
- unsigned long sent_post;
- unsigned long sent_post_failed;
- unsigned long sent_xmit;
- unsigned long reject_count;
- unsigned long extra_rcvbufs_sent;
-};
-
-/* struct visornic_devdata
- * @enabled: 0 disabled 1 enabled to receive.
- * @enab_dis_acked: NET_RCV_ENABLE/DISABLE acked by IOPART.
- * @struct *dev:
- * @struct *netdev:
- * @struct net_stats:
- * @interrupt_rcvd:
- * @rsp_queue:
- * @struct **rcvbuf:
- * @incarnation_id: incarnation_id lets IOPART know about
- * re-birth.
- * @old_flags: flags as they were prior to
- * set_multicast_list.
- * @usage: count of users.
- * @num_rcv_bufs: number of rcv buffers the vnic will post.
- * @num_rcv_bufs_could_not_alloc:
- * @num_rcvbuf_in_iovm:
- * @alloc_failed_in_if_needed_cnt:
- * @alloc_failed_in_repost_rtn_cnt:
- * @max_outstanding_net_xmits: absolute max number of outstanding xmits
- * - should never hit this.
- * @upper_threshold_net_xmits: high water mark for calling
- * netif_stop_queue().
- * @lower_threshold_net_xmits: high water mark for calling
- * netif_wake_queue().
- * @struct xmitbufhead: xmitbufhead - head of the xmit buffer list
- * sent to the IOPART end.
- * @server_down_complete_func:
- * @struct timeout_reset:
- * @struct *cmdrsp_rcv: cmdrsp_rcv is used for posting/unposting rcv
- * buffers.
- * @struct *xmit_cmdrsp: xmit_cmdrsp - issues NET_XMIT - only one
- * active xmit at a time.
- * @server_down: IOPART is down.
- * @server_change_state: Processing SERVER_CHANGESTATE msg.
- * @going_away: device is being torn down.
- * @interrupts_rcvd:
- * @interrupts_notme:
- * @interrupts_disabled:
- * @busy_cnt:
- * @priv_lock: spinlock to access devdata structures.
- * @flow_control_upper_hits:
- * @flow_control_lower_hits:
- * @n_rcv0: # rcvs of 0 buffers.
- * @n_rcv1: # rcvs of 1 buffers.
- * @n_rcv2: # rcvs of 2 buffers.
- * @n_rcvx: # rcvs of >2 buffers.
- * @found_repost_rcvbuf_cnt: # repost_rcvbuf_cnt.
- * @repost_found_skb_cnt: # of found the skb.
- * @n_repost_deficit: # of lost rcv buffers.
- * @bad_rcv_buf: # of unknown rcv skb not freed.
- * @n_rcv_packets_not_accepted: # bogs rcv packets.
- * @queuefullmsg_logged:
- * @struct chstat:
- * @struct napi:
- * @struct cmdrsp:
- */
-struct visornic_devdata {
- unsigned short enabled;
- unsigned short enab_dis_acked;
-
- struct visor_device *dev;
- struct net_device *netdev;
- struct net_device_stats net_stats;
- atomic_t interrupt_rcvd;
- wait_queue_head_t rsp_queue;
- struct sk_buff **rcvbuf;
- u64 incarnation_id;
- unsigned short old_flags;
- atomic_t usage;
-
- int num_rcv_bufs;
- int num_rcv_bufs_could_not_alloc;
- atomic_t num_rcvbuf_in_iovm;
- unsigned long alloc_failed_in_if_needed_cnt;
- unsigned long alloc_failed_in_repost_rtn_cnt;
-
- unsigned long max_outstanding_net_xmits;
- unsigned long upper_threshold_net_xmits;
- unsigned long lower_threshold_net_xmits;
- struct sk_buff_head xmitbufhead;
-
- visorbus_state_complete_func server_down_complete_func;
- struct work_struct timeout_reset;
- struct uiscmdrsp *cmdrsp_rcv;
- struct uiscmdrsp *xmit_cmdrsp;
- bool server_down;
- bool server_change_state;
- bool going_away;
- u64 interrupts_rcvd;
- u64 interrupts_notme;
- u64 interrupts_disabled;
- u64 busy_cnt;
- /* spinlock to access devdata structures. */
- spinlock_t priv_lock;
-
- /* flow control counter */
- u64 flow_control_upper_hits;
- u64 flow_control_lower_hits;
-
- /* debug counters */
- unsigned long n_rcv0;
- unsigned long n_rcv1;
- unsigned long n_rcv2;
- unsigned long n_rcvx;
- unsigned long found_repost_rcvbuf_cnt;
- unsigned long repost_found_skb_cnt;
- unsigned long n_repost_deficit;
- unsigned long bad_rcv_buf;
- unsigned long n_rcv_packets_not_accepted;
-
- int queuefullmsg_logged;
- struct chanstat chstat;
- struct napi_struct napi;
- struct uiscmdrsp cmdrsp[SIZEOF_CMDRSP];
-};
-
-/* Returns next non-zero index on success or 0 on failure (i.e. out of room). */
-static u16 add_physinfo_entries(u64 inp_pfn, u16 inp_off, u16 inp_len,
- u16 index, u16 max_pi_arr_entries,
- struct phys_info pi_arr[])
-{
- u16 i, len, firstlen;
-
- firstlen = PI_PAGE_SIZE - inp_off;
- if (inp_len <= firstlen) {
- /* The input entry spans only one page - add as is. */
- if (index >= max_pi_arr_entries)
- return 0;
- pi_arr[index].pi_pfn = inp_pfn;
- pi_arr[index].pi_off = (u16)inp_off;
- pi_arr[index].pi_len = (u16)inp_len;
- return index + 1;
- }
-
- /* This entry spans multiple pages. */
- for (len = inp_len, i = 0; len;
- len -= pi_arr[index + i].pi_len, i++) {
- if (index + i >= max_pi_arr_entries)
- return 0;
- pi_arr[index + i].pi_pfn = inp_pfn + i;
- if (i == 0) {
- pi_arr[index].pi_off = inp_off;
- pi_arr[index].pi_len = firstlen;
- } else {
- pi_arr[index + i].pi_off = 0;
- pi_arr[index + i].pi_len = min_t(u16, len,
- PI_PAGE_SIZE);
- }
- }
- return index + i;
-}
-
-/* visor_copy_fragsinfo_from_skb - copy fragment list in the SKB to a phys_info
- * array that the IOPART understands
- * @skb: Skbuff that we are pulling the frags from.
- * @firstfraglen: Length of first fragment in skb.
- * @frags_max: Max len of frags array.
- * @frags: Frags array filled in on output.
- *
- * Return: Positive integer indicating number of entries filled in frags on
- * success, negative integer on error.
- */
-static int visor_copy_fragsinfo_from_skb(struct sk_buff *skb,
- unsigned int firstfraglen,
- unsigned int frags_max,
- struct phys_info frags[])
-{
- unsigned int count = 0, frag, size, offset = 0, numfrags;
- unsigned int total_count;
-
- numfrags = skb_shinfo(skb)->nr_frags;
-
- /* Compute the number of fragments this skb has, and if its more than
- * frag array can hold, linearize the skb
- */
- total_count = numfrags + (firstfraglen / PI_PAGE_SIZE);
- if (firstfraglen % PI_PAGE_SIZE)
- total_count++;
-
- if (total_count > frags_max) {
- if (skb_linearize(skb))
- return -EINVAL;
- numfrags = skb_shinfo(skb)->nr_frags;
- firstfraglen = 0;
- }
-
- while (firstfraglen) {
- if (count == frags_max)
- return -EINVAL;
-
- frags[count].pi_pfn =
- page_to_pfn(virt_to_page(skb->data + offset));
- frags[count].pi_off =
- (unsigned long)(skb->data + offset) & PI_PAGE_MASK;
- size = min_t(unsigned int, firstfraglen,
- PI_PAGE_SIZE - frags[count].pi_off);
-
- /* can take smallest of firstfraglen (what's left) OR
- * bytes left in the page
- */
- frags[count].pi_len = size;
- firstfraglen -= size;
- offset += size;
- count++;
- }
- if (numfrags) {
- if ((count + numfrags) > frags_max)
- return -EINVAL;
-
- for (frag = 0; frag < numfrags; frag++) {
- count = add_physinfo_entries(page_to_pfn(
- skb_frag_page(&skb_shinfo(skb)->frags[frag])),
- skb_frag_off(&skb_shinfo(skb)->frags[frag]),
- skb_frag_size(&skb_shinfo(skb)->frags[frag]),
- count, frags_max, frags);
- /* add_physinfo_entries only returns
- * zero if the frags array is out of room
- * That should never happen because we
- * fail above, if count+numfrags > frags_max.
- */
- if (!count)
- return -EINVAL;
- }
- }
- if (skb_shinfo(skb)->frag_list) {
- struct sk_buff *skbinlist;
- int c;
-
- for (skbinlist = skb_shinfo(skb)->frag_list; skbinlist;
- skbinlist = skbinlist->next) {
- c = visor_copy_fragsinfo_from_skb(skbinlist,
- skbinlist->len -
- skbinlist->data_len,
- frags_max - count,
- &frags[count]);
- if (c < 0)
- return c;
- count += c;
- }
- }
- return count;
-}
-
-static ssize_t enable_ints_write(struct file *file,
- const char __user *buffer,
- size_t count, loff_t *ppos)
-{
- /* Don't want to break ABI here by having a debugfs
- * file that no longer exists or is writable, so
- * lets just make this a vestigual function
- */
- return count;
-}
-
-static const struct file_operations debugfs_enable_ints_fops = {
- .write = enable_ints_write,
-};
-
-/* visornic_serverdown_complete - pause device following IOPART going down
- * @devdata: Device managed by IOPART.
- *
- * The IO partition has gone down, and we need to do some cleanup for when it
- * comes back. Treat the IO partition as the link being down.
- */
-static void visornic_serverdown_complete(struct visornic_devdata *devdata)
-{
- struct net_device *netdev = devdata->netdev;
-
- /* Stop polling for interrupts */
- visorbus_disable_channel_interrupts(devdata->dev);
-
- rtnl_lock();
- dev_close(netdev);
- rtnl_unlock();
-
- atomic_set(&devdata->num_rcvbuf_in_iovm, 0);
- devdata->chstat.sent_xmit = 0;
- devdata->chstat.got_xmit_done = 0;
-
- if (devdata->server_down_complete_func)
- (*devdata->server_down_complete_func)(devdata->dev, 0);
-
- devdata->server_down = true;
- devdata->server_change_state = false;
- devdata->server_down_complete_func = NULL;
-}
-
-/* visornic_serverdown - Command has notified us that IOPART is down
- * @devdata: Device managed by IOPART.
- * @complete_func: Function to call when finished.
- *
- * Schedule the work needed to handle the server down request. Make sure we
- * haven't already handled the server change state event.
- *
- * Return: 0 if we scheduled the work, negative integer on error.
- */
-static int visornic_serverdown(struct visornic_devdata *devdata,
- visorbus_state_complete_func complete_func)
-{
- unsigned long flags;
- int err;
-
- spin_lock_irqsave(&devdata->priv_lock, flags);
- if (devdata->server_change_state) {
- dev_dbg(&devdata->dev->device, "%s changing state\n",
- __func__);
- err = -EINVAL;
- goto err_unlock;
- }
- if (devdata->server_down) {
- dev_dbg(&devdata->dev->device, "%s already down\n",
- __func__);
- err = -EINVAL;
- goto err_unlock;
- }
- if (devdata->going_away) {
- dev_dbg(&devdata->dev->device,
- "%s aborting because device removal pending\n",
- __func__);
- err = -ENODEV;
- goto err_unlock;
- }
- devdata->server_change_state = true;
- devdata->server_down_complete_func = complete_func;
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- visornic_serverdown_complete(devdata);
- return 0;
-
-err_unlock:
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- return err;
-}
-
-/* alloc_rcv_buf - alloc rcv buffer to be given to the IO Partition
- * @netdev: Network adapter the rcv bufs are attached too.
- *
- * Create an sk_buff (rcv_buf) that will be passed to the IO Partition
- * so that it can write rcv data into our memory space.
- *
- * Return: Pointer to sk_buff.
- */
-static struct sk_buff *alloc_rcv_buf(struct net_device *netdev)
-{
- struct sk_buff *skb;
-
- /* NOTE: the first fragment in each rcv buffer is pointed to by
- * rcvskb->data. For now all rcv buffers will be RCVPOST_BUF_SIZE
- * in length, so the first frag is large enough to hold 1514.
- */
- skb = alloc_skb(RCVPOST_BUF_SIZE, GFP_ATOMIC);
- if (!skb)
- return NULL;
- skb->dev = netdev;
- /* current value of mtu doesn't come into play here; large
- * packets will just end up using multiple rcv buffers all of
- * same size.
- */
- skb->len = RCVPOST_BUF_SIZE;
- /* alloc_skb already zeroes it out for clarification. */
- skb->data_len = 0;
- return skb;
-}
-
-/* post_skb - post a skb to the IO Partition
- * @cmdrsp: Cmdrsp packet to be send to the IO Partition.
- * @devdata: visornic_devdata to post the skb to.
- * @skb: Skb to give to the IO partition.
- *
- * Return: 0 on success, negative integer on error.
- */
-static int post_skb(struct uiscmdrsp *cmdrsp, struct visornic_devdata *devdata,
- struct sk_buff *skb)
-{
- int err;
-
- cmdrsp->net.buf = skb;
- cmdrsp->net.rcvpost.frag.pi_pfn = page_to_pfn(virt_to_page(skb->data));
- cmdrsp->net.rcvpost.frag.pi_off =
- (unsigned long)skb->data & PI_PAGE_MASK;
- cmdrsp->net.rcvpost.frag.pi_len = skb->len;
- cmdrsp->net.rcvpost.unique_num = devdata->incarnation_id;
-
- if ((cmdrsp->net.rcvpost.frag.pi_off + skb->len) > PI_PAGE_SIZE)
- return -EINVAL;
-
- cmdrsp->net.type = NET_RCV_POST;
- cmdrsp->cmdtype = CMD_NET_TYPE;
- err = visorchannel_signalinsert(devdata->dev->visorchannel,
- IOCHAN_TO_IOPART,
- cmdrsp);
- if (err) {
- devdata->chstat.sent_post_failed++;
- return err;
- }
-
- atomic_inc(&devdata->num_rcvbuf_in_iovm);
- devdata->chstat.sent_post++;
- return 0;
-}
-
-/* send_enbdis - Send NET_RCV_ENBDIS to IO Partition
- * @netdev: Netdevice we are enabling/disabling, used as context return value.
- * @state: Enable = 1/disable = 0.
- * @devdata: Visornic device we are enabling/disabling.
- *
- * Send the enable/disable message to the IO Partition.
- *
- * Return: 0 on success, negative integer on error.
- */
-static int send_enbdis(struct net_device *netdev, int state,
- struct visornic_devdata *devdata)
-{
- int err;
-
- devdata->cmdrsp_rcv->net.enbdis.enable = state;
- devdata->cmdrsp_rcv->net.enbdis.context = netdev;
- devdata->cmdrsp_rcv->net.type = NET_RCV_ENBDIS;
- devdata->cmdrsp_rcv->cmdtype = CMD_NET_TYPE;
- err = visorchannel_signalinsert(devdata->dev->visorchannel,
- IOCHAN_TO_IOPART,
- devdata->cmdrsp_rcv);
- if (err)
- return err;
- devdata->chstat.sent_enbdis++;
- return 0;
-}
-
-/* visornic_disable_with_timeout - disable network adapter
- * @netdev: netdevice to disable.
- * @timeout: Timeout to wait for disable.
- *
- * Disable the network adapter and inform the IO Partition that we are disabled.
- * Reclaim memory from rcv bufs.
- *
- * Return: 0 on success, negative integer on failure of IO Partition responding.
- */
-static int visornic_disable_with_timeout(struct net_device *netdev,
- const int timeout)
-{
- struct visornic_devdata *devdata = netdev_priv(netdev);
- int i;
- unsigned long flags;
- int wait = 0;
- int err;
-
- /* send a msg telling the other end we are stopping incoming pkts */
- spin_lock_irqsave(&devdata->priv_lock, flags);
- devdata->enabled = 0;
- /* must wait for ack */
- devdata->enab_dis_acked = 0;
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- /* send disable and wait for ack -- don't hold lock when sending
- * disable because if the queue is full, insert might sleep.
- * If an error occurs, don't wait for the timeout.
- */
- err = send_enbdis(netdev, 0, devdata);
- if (err)
- return err;
-
- /* wait for ack to arrive before we try to free rcv buffers
- * NOTE: the other end automatically unposts the rcv buffers
- * when it gets a disable.
- */
- spin_lock_irqsave(&devdata->priv_lock, flags);
- while ((timeout == VISORNIC_INFINITE_RSP_WAIT) ||
- (wait < timeout)) {
- if (devdata->enab_dis_acked)
- break;
- if (devdata->server_down || devdata->server_change_state) {
- dev_dbg(&netdev->dev, "%s server went away\n",
- __func__);
- break;
- }
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- wait += schedule_timeout(msecs_to_jiffies(10));
- spin_lock_irqsave(&devdata->priv_lock, flags);
- }
-
- /* Wait for usage to go to 1 (no other users) before freeing
- * rcv buffers
- */
- if (atomic_read(&devdata->usage) > 1) {
- while (1) {
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- schedule_timeout(msecs_to_jiffies(10));
- spin_lock_irqsave(&devdata->priv_lock, flags);
- if (atomic_read(&devdata->usage))
- break;
- }
- }
- /* we've set enabled to 0, so we can give up the lock. */
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- /* stop the transmit queue so nothing more can be transmitted */
- netif_stop_queue(netdev);
-
- napi_disable(&devdata->napi);
-
- skb_queue_purge(&devdata->xmitbufhead);
-
- /* Free rcv buffers - other end has automatically unposed them on
- * disable
- */
- for (i = 0; i < devdata->num_rcv_bufs; i++) {
- if (devdata->rcvbuf[i]) {
- kfree_skb(devdata->rcvbuf[i]);
- devdata->rcvbuf[i] = NULL;
- }
- }
-
- return 0;
-}
-
-/* init_rcv_bufs - initialize receive buffs and send them to the IO Partition
- * @netdev: struct netdevice.
- * @devdata: visornic_devdata.
- *
- * Allocate rcv buffers and post them to the IO Partition.
- *
- * Return: 0 on success, negative integer on failure.
- */
-static int init_rcv_bufs(struct net_device *netdev,
- struct visornic_devdata *devdata)
-{
- int i, j, count, err;
-
- /* allocate fixed number of receive buffers to post to uisnic
- * post receive buffers after we've allocated a required amount
- */
- for (i = 0; i < devdata->num_rcv_bufs; i++) {
- devdata->rcvbuf[i] = alloc_rcv_buf(netdev);
- /* if we failed to allocate one let us stop */
- if (!devdata->rcvbuf[i])
- break;
- }
- /* couldn't even allocate one -- bail out */
- if (i == 0)
- return -ENOMEM;
- count = i;
-
- /* Ensure we can alloc 2/3rd of the requested number of buffers.
- * 2/3 is an arbitrary choice; used also in ndis init.c
- */
- if (count < ((2 * devdata->num_rcv_bufs) / 3)) {
- /* free receive buffers we did alloc and then bail out */
- for (i = 0; i < count; i++) {
- kfree_skb(devdata->rcvbuf[i]);
- devdata->rcvbuf[i] = NULL;
- }
- return -ENOMEM;
- }
-
- /* post receive buffers to receive incoming input - without holding
- * lock - we've not enabled nor started the queue so there shouldn't
- * be any rcv or xmit activity
- */
- for (i = 0; i < count; i++) {
- err = post_skb(devdata->cmdrsp_rcv, devdata,
- devdata->rcvbuf[i]);
- if (!err)
- continue;
-
- /* Error handling -
- * If we posted at least one skb, we should return success,
- * but need to free the resources that we have not successfully
- * posted.
- */
- for (j = i; j < count; j++) {
- kfree_skb(devdata->rcvbuf[j]);
- devdata->rcvbuf[j] = NULL;
- }
- if (i == 0)
- return err;
- break;
- }
-
- return 0;
-}
-
-/* visornic_enable_with_timeout - send enable to IO Partition
- * @netdev: struct net_device.
- * @timeout: Time to wait for the ACK from the enable.
- *
- * Sends enable to IOVM and inits, and posts receive buffers to IOVM. Timeout is
- * defined in msecs (timeout of 0 specifies infinite wait).
- *
- * Return: 0 on success, negative integer on failure.
- */
-static int visornic_enable_with_timeout(struct net_device *netdev,
- const int timeout)
-{
- int err = 0;
- struct visornic_devdata *devdata = netdev_priv(netdev);
- unsigned long flags;
- int wait = 0;
-
- napi_enable(&devdata->napi);
-
- /* NOTE: the other end automatically unposts the rcv buffers when it
- * gets a disable.
- */
- err = init_rcv_bufs(netdev, devdata);
- if (err < 0) {
- dev_err(&netdev->dev,
- "%s failed to init rcv bufs\n", __func__);
- return err;
- }
-
- spin_lock_irqsave(&devdata->priv_lock, flags);
- devdata->enabled = 1;
- devdata->enab_dis_acked = 0;
-
- /* now we're ready, let's send an ENB to uisnic but until we get
- * an ACK back from uisnic, we'll drop the packets
- */
- devdata->n_rcv_packets_not_accepted = 0;
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- /* send enable and wait for ack -- don't hold lock when sending enable
- * because if the queue is full, insert might sleep. If an error
- * occurs error out.
- */
- err = send_enbdis(netdev, 1, devdata);
- if (err)
- return err;
-
- spin_lock_irqsave(&devdata->priv_lock, flags);
- while ((timeout == VISORNIC_INFINITE_RSP_WAIT) ||
- (wait < timeout)) {
- if (devdata->enab_dis_acked)
- break;
- if (devdata->server_down || devdata->server_change_state) {
- dev_dbg(&netdev->dev, "%s server went away\n",
- __func__);
- break;
- }
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- wait += schedule_timeout(msecs_to_jiffies(10));
- spin_lock_irqsave(&devdata->priv_lock, flags);
- }
-
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- if (!devdata->enab_dis_acked) {
- dev_err(&netdev->dev, "%s missing ACK\n", __func__);
- return -EIO;
- }
-
- netif_start_queue(netdev);
- return 0;
-}
-
-/* visornic_timeout_reset - handle xmit timeout resets
- * @work: Work item that scheduled the work.
- *
- * Transmit timeouts are typically handled by resetting the device for our
- * virtual NIC; we will send a disable and enable to the IOVM. If it doesn't
- * respond, we will trigger a serverdown.
- */
-static void visornic_timeout_reset(struct work_struct *work)
-{
- struct visornic_devdata *devdata;
- struct net_device *netdev;
- int response = 0;
-
- devdata = container_of(work, struct visornic_devdata, timeout_reset);
- netdev = devdata->netdev;
-
- rtnl_lock();
- if (!netif_running(netdev)) {
- rtnl_unlock();
- return;
- }
-
- response = visornic_disable_with_timeout(netdev,
- VISORNIC_INFINITE_RSP_WAIT);
- if (response)
- goto call_serverdown;
-
- response = visornic_enable_with_timeout(netdev,
- VISORNIC_INFINITE_RSP_WAIT);
- if (response)
- goto call_serverdown;
-
- rtnl_unlock();
-
- return;
-
-call_serverdown:
- visornic_serverdown(devdata, NULL);
- rtnl_unlock();
-}
-
-/* visornic_open - enable the visornic device and mark the queue started
- * @netdev: netdevice to start.
- *
- * Enable the device and start the transmit queue.
- *
- * Return: 0 on success.
- */
-static int visornic_open(struct net_device *netdev)
-{
- visornic_enable_with_timeout(netdev, VISORNIC_INFINITE_RSP_WAIT);
- return 0;
-}
-
-/* visornic_close - disables the visornic device and stops the queues
- * @netdev: netdevice to stop.
- *
- * Disable the device and stop the transmit queue.
- *
- * Return 0 on success.
- */
-static int visornic_close(struct net_device *netdev)
-{
- visornic_disable_with_timeout(netdev, VISORNIC_INFINITE_RSP_WAIT);
- return 0;
-}
-
-/* devdata_xmits_outstanding - compute outstanding xmits
- * @devdata: visornic_devdata for device
- *
- * Return: Long integer representing the number of outstanding xmits.
- */
-static unsigned long devdata_xmits_outstanding(struct visornic_devdata *devdata)
-{
- if (devdata->chstat.sent_xmit >= devdata->chstat.got_xmit_done)
- return devdata->chstat.sent_xmit -
- devdata->chstat.got_xmit_done;
- return (ULONG_MAX - devdata->chstat.got_xmit_done
- + devdata->chstat.sent_xmit + 1);
-}
-
-/* vnic_hit_high_watermark
- * @devdata: Indicates visornic device we are checking.
- * @high_watermark: Max num of unacked xmits we will tolerate before we will
- * start throttling.
- *
- * Return: True iff the number of unacked xmits sent to the IO Partition is >=
- * high_watermark. False otherwise.
- */
-static bool vnic_hit_high_watermark(struct visornic_devdata *devdata,
- ulong high_watermark)
-{
- return (devdata_xmits_outstanding(devdata) >= high_watermark);
-}
-
-/* vnic_hit_low_watermark
- * @devdata: Indicates visornic device we are checking.
- * @low_watermark: We will wait until the num of unacked xmits drops to this
- * value or lower before we start transmitting again.
- *
- * Return: True iff the number of unacked xmits sent to the IO Partition is <=
- * low_watermark.
- */
-static bool vnic_hit_low_watermark(struct visornic_devdata *devdata,
- ulong low_watermark)
-{
- return (devdata_xmits_outstanding(devdata) <= low_watermark);
-}
-
-/* visornic_xmit - send a packet to the IO Partition
- * @skb: Packet to be sent.
- * @netdev: Net device the packet is being sent from.
- *
- * Convert the skb to a cmdrsp so the IO Partition can understand it, and send
- * the XMIT command to the IO Partition for processing. This function is
- * protected from concurrent calls by a spinlock xmit_lock in the net_device
- * struct. As soon as the function returns, it can be called again.
- *
- * Return: NETDEV_TX_OK.
- */
-static netdev_tx_t visornic_xmit(struct sk_buff *skb, struct net_device *netdev)
-{
- struct visornic_devdata *devdata;
- int len, firstfraglen, padlen;
- struct uiscmdrsp *cmdrsp = NULL;
- unsigned long flags;
- int err;
-
- devdata = netdev_priv(netdev);
- spin_lock_irqsave(&devdata->priv_lock, flags);
-
- if (netif_queue_stopped(netdev) || devdata->server_down ||
- devdata->server_change_state) {
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- devdata->busy_cnt++;
- dev_dbg(&netdev->dev,
- "%s busy - queue stopped\n", __func__);
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- /* sk_buff struct is used to host network data throughout all the
- * linux network subsystems
- */
- len = skb->len;
-
- /* skb->len is the FULL length of data (including fragmentary portion)
- * skb->data_len is the length of the fragment portion in frags
- * skb->len - skb->data_len is size of the 1st fragment in skb->data
- * calculate the length of the first fragment that skb->data is
- * pointing to
- */
- firstfraglen = skb->len - skb->data_len;
- if (firstfraglen < ETH_HLEN) {
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- devdata->busy_cnt++;
- dev_err(&netdev->dev,
- "%s busy - first frag too small (%d)\n",
- __func__, firstfraglen);
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- if (len < ETH_MIN_PACKET_SIZE &&
- ((skb_end_pointer(skb) - skb->data) >= ETH_MIN_PACKET_SIZE)) {
- /* pad the packet out to minimum size */
- padlen = ETH_MIN_PACKET_SIZE - len;
- skb_put_zero(skb, padlen);
- len += padlen;
- firstfraglen += padlen;
- }
-
- cmdrsp = devdata->xmit_cmdrsp;
- /* clear cmdrsp */
- memset(cmdrsp, 0, SIZEOF_CMDRSP);
- cmdrsp->net.type = NET_XMIT;
- cmdrsp->cmdtype = CMD_NET_TYPE;
-
- /* save the pointer to skb -- we'll need it for completion */
- cmdrsp->net.buf = skb;
-
- if (vnic_hit_high_watermark(devdata,
- devdata->max_outstanding_net_xmits)) {
- /* extra NET_XMITs queued over to IOVM - need to wait */
- devdata->chstat.reject_count++;
- if (!devdata->queuefullmsg_logged &&
- ((devdata->chstat.reject_count & 0x3ff) == 1))
- devdata->queuefullmsg_logged = 1;
- netif_stop_queue(netdev);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- devdata->busy_cnt++;
- dev_dbg(&netdev->dev,
- "%s busy - waiting for iovm to catch up\n",
- __func__);
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- if (devdata->queuefullmsg_logged)
- devdata->queuefullmsg_logged = 0;
-
- if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
- cmdrsp->net.xmt.lincsum.valid = 1;
- cmdrsp->net.xmt.lincsum.protocol = skb->protocol;
- if (skb_transport_header(skb) > skb->data) {
- cmdrsp->net.xmt.lincsum.hrawoff =
- skb_transport_header(skb) - skb->data;
- cmdrsp->net.xmt.lincsum.hrawoff = 1;
- }
- if (skb_network_header(skb) > skb->data) {
- cmdrsp->net.xmt.lincsum.nhrawoff =
- skb_network_header(skb) - skb->data;
- cmdrsp->net.xmt.lincsum.nhrawoffv = 1;
- }
- cmdrsp->net.xmt.lincsum.csum = skb->csum;
- } else {
- cmdrsp->net.xmt.lincsum.valid = 0;
- }
-
- /* save off the length of the entire data packet */
- cmdrsp->net.xmt.len = len;
-
- /* copy ethernet header from first frag into ocmdrsp
- * - everything else will be pass in frags & DMA'ed
- */
- memcpy(cmdrsp->net.xmt.ethhdr, skb->data, ETH_HLEN);
-
- /* copy frags info - from skb->data we need to only provide access
- * beyond eth header
- */
- cmdrsp->net.xmt.num_frags =
- visor_copy_fragsinfo_from_skb(skb, firstfraglen,
- MAX_PHYS_INFO,
- cmdrsp->net.xmt.frags);
- if (cmdrsp->net.xmt.num_frags < 0) {
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- devdata->busy_cnt++;
- dev_err(&netdev->dev,
- "%s busy - copy frags failed\n", __func__);
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- err = visorchannel_signalinsert(devdata->dev->visorchannel,
- IOCHAN_TO_IOPART, cmdrsp);
- if (err) {
- netif_stop_queue(netdev);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- devdata->busy_cnt++;
- dev_dbg(&netdev->dev,
- "%s busy - signalinsert failed\n", __func__);
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- /* Track the skbs that have been sent to the IOVM for XMIT */
- skb_queue_head(&devdata->xmitbufhead, skb);
-
- /* update xmt stats */
- devdata->net_stats.tx_packets++;
- devdata->net_stats.tx_bytes += skb->len;
- devdata->chstat.sent_xmit++;
-
- /* check if we have hit the high watermark for netif_stop_queue() */
- if (vnic_hit_high_watermark(devdata,
- devdata->upper_threshold_net_xmits)) {
- /* extra NET_XMITs queued over to IOVM - need to wait */
- /* stop queue - call netif_wake_queue() after lower threshold */
- netif_stop_queue(netdev);
- dev_dbg(&netdev->dev,
- "%s busy - invoking iovm flow control\n",
- __func__);
- devdata->flow_control_upper_hits++;
- }
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- /* skb will be freed when we get back NET_XMIT_DONE */
- return NETDEV_TX_OK;
-}
-
-/* visornic_get_stats - returns net_stats of the visornic device
- * @netdev: netdevice.
- *
- * Return: Pointer to the net_device_stats struct for the device.
- */
-static struct net_device_stats *visornic_get_stats(struct net_device *netdev)
-{
- struct visornic_devdata *devdata = netdev_priv(netdev);
-
- return &devdata->net_stats;
-}
-
-/* visornic_change_mtu - changes mtu of device
- * @netdev: netdevice.
- * @new_mtu: Value of new mtu.
- *
- * The device's MTU cannot be changed by system; it must be changed via a
- * CONTROLVM message. All vnics and pnics in a switch have to have the same MTU
- * for everything to work. Currently not supported.
- *
- * Return: -EINVAL.
- */
-static int visornic_change_mtu(struct net_device *netdev, int new_mtu)
-{
- return -EINVAL;
-}
-
-/* visornic_set_multi - set visornic device flags
- * @netdev: netdevice.
- *
- * The only flag we currently support is IFF_PROMISC.
- */
-static void visornic_set_multi(struct net_device *netdev)
-{
- struct uiscmdrsp *cmdrsp;
- struct visornic_devdata *devdata = netdev_priv(netdev);
- int err = 0;
-
- if (devdata->old_flags == netdev->flags)
- return;
-
- if ((netdev->flags & IFF_PROMISC) ==
- (devdata->old_flags & IFF_PROMISC))
- goto out_save_flags;
-
- cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC);
- if (!cmdrsp)
- return;
- cmdrsp->cmdtype = CMD_NET_TYPE;
- cmdrsp->net.type = NET_RCV_PROMISC;
- cmdrsp->net.enbdis.context = netdev;
- cmdrsp->net.enbdis.enable =
- netdev->flags & IFF_PROMISC;
- err = visorchannel_signalinsert(devdata->dev->visorchannel,
- IOCHAN_TO_IOPART,
- cmdrsp);
- kfree(cmdrsp);
- if (err)
- return;
-
-out_save_flags:
- devdata->old_flags = netdev->flags;
-}
-
-/* visornic_xmit_timeout - request to timeout the xmit
- * @netdev: netdevice.
- *
- * Queue the work and return. Make sure we have not already been informed that
- * the IO Partition is gone; if so, we will have already timed-out the xmits.
- */
-static void visornic_xmit_timeout(struct net_device *netdev, unsigned int txqueue)
-{
- struct visornic_devdata *devdata = netdev_priv(netdev);
- unsigned long flags;
-
- spin_lock_irqsave(&devdata->priv_lock, flags);
- if (devdata->going_away) {
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- dev_dbg(&devdata->dev->device,
- "%s aborting because device removal pending\n",
- __func__);
- return;
- }
-
- /* Ensure that a ServerDown message hasn't been received */
- if (!devdata->enabled ||
- (devdata->server_down && !devdata->server_change_state)) {
- dev_dbg(&netdev->dev, "%s no processing\n",
- __func__);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- return;
- }
- schedule_work(&devdata->timeout_reset);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-}
-
-/* repost_return - repost rcv bufs that have come back
- * @cmdrsp: IO channel command struct to post.
- * @devdata: Visornic devdata for the device.
- * @skb: Socket buffer.
- * @netdev: netdevice.
- *
- * Repost rcv buffers that have been returned to us when we are finished
- * with them.
- *
- * Return: 0 for success, negative integer on error.
- */
-static int repost_return(struct uiscmdrsp *cmdrsp,
- struct visornic_devdata *devdata,
- struct sk_buff *skb, struct net_device *netdev)
-{
- struct net_pkt_rcv copy;
- int i = 0, cc, numreposted;
- int found_skb = 0;
- int status = 0;
-
- copy = cmdrsp->net.rcv;
- switch (copy.numrcvbufs) {
- case 0:
- devdata->n_rcv0++;
- break;
- case 1:
- devdata->n_rcv1++;
- break;
- case 2:
- devdata->n_rcv2++;
- break;
- default:
- devdata->n_rcvx++;
- break;
- }
- for (cc = 0, numreposted = 0; cc < copy.numrcvbufs; cc++) {
- for (i = 0; i < devdata->num_rcv_bufs; i++) {
- if (devdata->rcvbuf[i] != copy.rcvbuf[cc])
- continue;
-
- if ((skb) && devdata->rcvbuf[i] == skb) {
- devdata->found_repost_rcvbuf_cnt++;
- found_skb = 1;
- devdata->repost_found_skb_cnt++;
- }
- devdata->rcvbuf[i] = alloc_rcv_buf(netdev);
- if (!devdata->rcvbuf[i]) {
- devdata->num_rcv_bufs_could_not_alloc++;
- devdata->alloc_failed_in_repost_rtn_cnt++;
- status = -ENOMEM;
- break;
- }
- status = post_skb(cmdrsp, devdata, devdata->rcvbuf[i]);
- if (status) {
- kfree_skb(devdata->rcvbuf[i]);
- devdata->rcvbuf[i] = NULL;
- break;
- }
- numreposted++;
- break;
- }
- }
- if (numreposted != copy.numrcvbufs) {
- devdata->n_repost_deficit++;
- status = -EINVAL;
- }
- if (skb) {
- if (found_skb) {
- kfree_skb(skb);
- } else {
- status = -EINVAL;
- devdata->bad_rcv_buf++;
- }
- }
- return status;
-}
-
-/* visornic_rx - handle receive packets coming back from IO Partition
- * @cmdrsp: Receive packet returned from IO Partition.
- *
- * Got a receive packet back from the IO Partition; handle it and send it up
- * the stack.
-
- * Return: 1 iff an skb was received, otherwise 0.
- */
-static int visornic_rx(struct uiscmdrsp *cmdrsp)
-{
- struct visornic_devdata *devdata;
- struct sk_buff *skb, *prev, *curr;
- struct net_device *netdev;
- int cc, currsize, off;
- struct ethhdr *eth;
- unsigned long flags;
-
- /* post new rcv buf to the other end using the cmdrsp we have at hand
- * post it without holding lock - but we'll use the signal lock to
- * synchronize the queue insert the cmdrsp that contains the net.rcv
- * is the one we are using to repost, so copy the info we need from it.
- */
- skb = cmdrsp->net.buf;
- netdev = skb->dev;
-
- devdata = netdev_priv(netdev);
-
- spin_lock_irqsave(&devdata->priv_lock, flags);
- atomic_dec(&devdata->num_rcvbuf_in_iovm);
-
- /* set length to how much was ACTUALLY received -
- * NOTE: rcv_done_len includes actual length of data rcvd
- * including ethhdr
- */
- skb->len = cmdrsp->net.rcv.rcv_done_len;
-
- /* update rcv stats - call it with priv_lock held */
- devdata->net_stats.rx_packets++;
- devdata->net_stats.rx_bytes += skb->len;
-
- /* test enabled while holding lock */
- if (!(devdata->enabled && devdata->enab_dis_acked)) {
- /* don't process it unless we're in enable mode and until
- * we've gotten an ACK saying the other end got our RCV enable
- */
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- repost_return(cmdrsp, devdata, skb, netdev);
- return 0;
- }
-
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- /* when skb was allocated, skb->dev, skb->data, skb->len and
- * skb->data_len were setup. AND, data has already put into the
- * skb (both first frag and in frags pages)
- * NOTE: firstfragslen is the amount of data in skb->data and that
- * which is not in nr_frags or frag_list. This is now simply
- * RCVPOST_BUF_SIZE. bump tail to show how much data is in
- * firstfrag & set data_len to show rest see if we have to chain
- * frag_list.
- */
- /* do PRECAUTIONARY check */
- if (skb->len > RCVPOST_BUF_SIZE) {
- if (cmdrsp->net.rcv.numrcvbufs < 2) {
- if (repost_return(cmdrsp, devdata, skb, netdev) < 0)
- dev_err(&devdata->netdev->dev,
- "repost_return failed");
- return 0;
- }
- /* length rcvd is greater than firstfrag in this skb rcv buf */
- /* amount in skb->data */
- skb->tail += RCVPOST_BUF_SIZE;
- /* amount that will be in frag_list */
- skb->data_len = skb->len - RCVPOST_BUF_SIZE;
- } else {
- /* data fits in this skb - no chaining - do
- * PRECAUTIONARY check
- */
- /* should be 1 */
- if (cmdrsp->net.rcv.numrcvbufs != 1) {
- if (repost_return(cmdrsp, devdata, skb, netdev) < 0)
- dev_err(&devdata->netdev->dev,
- "repost_return failed");
- return 0;
- }
- skb->tail += skb->len;
- /* nothing rcvd in frag_list */
- skb->data_len = 0;
- }
- off = skb_tail_pointer(skb) - skb->data;
-
- /* amount we bumped tail by in the head skb
- * it is used to calculate the size of each chained skb below
- * it is also used to index into bufline to continue the copy
- * (for chansocktwopc)
- * if necessary chain the rcv skbs together.
- * NOTE: index 0 has the same as cmdrsp->net.rcv.skb; we need to
- * chain the rest to that one.
- * - do PRECAUTIONARY check
- */
- if (cmdrsp->net.rcv.rcvbuf[0] != skb) {
- if (repost_return(cmdrsp, devdata, skb, netdev) < 0)
- dev_err(&devdata->netdev->dev, "repost_return failed");
- return 0;
- }
-
- if (cmdrsp->net.rcv.numrcvbufs > 1) {
- /* chain the various rcv buffers into the skb's frag_list. */
- /* Note: off was initialized above */
- for (cc = 1, prev = NULL;
- cc < cmdrsp->net.rcv.numrcvbufs; cc++) {
- curr = (struct sk_buff *)cmdrsp->net.rcv.rcvbuf[cc];
- curr->next = NULL;
- /* start of list- set head */
- if (!prev)
- skb_shinfo(skb)->frag_list = curr;
- else
- prev->next = curr;
- prev = curr;
-
- /* should we set skb->len and skb->data_len for each
- * buffer being chained??? can't hurt!
- */
- currsize = min(skb->len - off,
- (unsigned int)RCVPOST_BUF_SIZE);
- curr->len = currsize;
- curr->tail += currsize;
- curr->data_len = 0;
- off += currsize;
- }
- /* assert skb->len == off */
- if (skb->len != off) {
- netdev_err(devdata->netdev,
- "something wrong; skb->len:%d != off:%d\n",
- skb->len, off);
- }
- }
-
- /* set up packet's protocol type using ethernet header - this
- * sets up skb->pkt_type & it also PULLS out the eth header
- */
- skb->protocol = eth_type_trans(skb, netdev);
- eth = eth_hdr(skb);
- skb->csum = 0;
- skb->ip_summed = CHECKSUM_NONE;
-
- do {
- /* accept all packets */
- if (netdev->flags & IFF_PROMISC)
- break;
- if (skb->pkt_type == PACKET_BROADCAST) {
- /* accept all broadcast packets */
- if (netdev->flags & IFF_BROADCAST)
- break;
- } else if (skb->pkt_type == PACKET_MULTICAST) {
- if ((netdev->flags & IFF_MULTICAST) &&
- (netdev_mc_count(netdev))) {
- struct netdev_hw_addr *ha;
- int found_mc = 0;
-
- /* only accept multicast packets that we can
- * find in our multicast address list
- */
- netdev_for_each_mc_addr(ha, netdev) {
- if (ether_addr_equal(eth->h_dest,
- ha->addr)) {
- found_mc = 1;
- break;
- }
- }
- /* accept pkt, dest matches a multicast addr */
- if (found_mc)
- break;
- }
- /* accept packet, h_dest must match vnic mac address */
- } else if (skb->pkt_type == PACKET_HOST) {
- break;
- } else if (skb->pkt_type == PACKET_OTHERHOST) {
- /* something is not right */
- dev_err(&devdata->netdev->dev,
- "**** FAILED to deliver rcv packet to OS; name:%s Dest:%pM VNIC:%pM\n",
- netdev->name, eth->h_dest, netdev->dev_addr);
- }
- /* drop packet - don't forward it up to OS */
- devdata->n_rcv_packets_not_accepted++;
- repost_return(cmdrsp, devdata, skb, netdev);
- return 0;
- } while (0);
-
- netif_receive_skb(skb);
- /* netif_rx returns various values, but "in practice most drivers
- * ignore the return value
- */
-
- skb = NULL;
- /* whether the packet got dropped or handled, the skb is freed by
- * kernel code, so we shouldn't free it. but we should repost a
- * new rcv buffer.
- */
- repost_return(cmdrsp, devdata, skb, netdev);
- return 1;
-}
-
-/* devdata_initialize - initialize devdata structure
- * @devdata: visornic_devdata structure to initialize.
- * @dev: visorbus_device it belongs to.
- *
- * Setup initial values for the visornic, based on channel and default values.
- *
- * Return: A pointer to the devdata structure.
- */
-static struct visornic_devdata *devdata_initialize(
- struct visornic_devdata *devdata,
- struct visor_device *dev)
-{
- devdata->dev = dev;
- devdata->incarnation_id = get_jiffies_64();
- return devdata;
-}
-
-/* devdata_release - free up references in devdata
- * @devdata: Struct to clean up.
- */
-static void devdata_release(struct visornic_devdata *devdata)
-{
- kfree(devdata->rcvbuf);
- kfree(devdata->cmdrsp_rcv);
- kfree(devdata->xmit_cmdrsp);
-}
-
-static const struct net_device_ops visornic_dev_ops = {
- .ndo_open = visornic_open,
- .ndo_stop = visornic_close,
- .ndo_start_xmit = visornic_xmit,
- .ndo_get_stats = visornic_get_stats,
- .ndo_change_mtu = visornic_change_mtu,
- .ndo_tx_timeout = visornic_xmit_timeout,
- .ndo_set_rx_mode = visornic_set_multi,
-};
-
-/* DebugFS code */
-static ssize_t info_debugfs_read(struct file *file, char __user *buf,
- size_t len, loff_t *offset)
-{
- ssize_t bytes_read = 0;
- int str_pos = 0;
- struct visornic_devdata *devdata;
- struct net_device *dev;
- char *vbuf;
-
- if (len > MAX_BUF)
- len = MAX_BUF;
- vbuf = kzalloc(len, GFP_KERNEL);
- if (!vbuf)
- return -ENOMEM;
-
- /* for each vnic channel dump out channel specific data */
- rcu_read_lock();
- for_each_netdev_rcu(current->nsproxy->net_ns, dev) {
- /* Only consider netdevs that are visornic, and are open */
- if (dev->netdev_ops != &visornic_dev_ops ||
- (!netif_queue_stopped(dev)))
- continue;
-
- devdata = netdev_priv(dev);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- "netdev = %s (0x%p), MAC Addr %pM\n",
- dev->name,
- dev,
- dev->dev_addr);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- "VisorNic Dev Info = 0x%p\n", devdata);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " num_rcv_bufs = %d\n",
- devdata->num_rcv_bufs);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " max_outstanding_next_xmits = %lu\n",
- devdata->max_outstanding_net_xmits);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " upper_threshold_net_xmits = %lu\n",
- devdata->upper_threshold_net_xmits);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " lower_threshold_net_xmits = %lu\n",
- devdata->lower_threshold_net_xmits);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " queuefullmsg_logged = %d\n",
- devdata->queuefullmsg_logged);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.got_rcv = %lu\n",
- devdata->chstat.got_rcv);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.got_enbdisack = %lu\n",
- devdata->chstat.got_enbdisack);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.got_xmit_done = %lu\n",
- devdata->chstat.got_xmit_done);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.xmit_fail = %lu\n",
- devdata->chstat.xmit_fail);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.sent_enbdis = %lu\n",
- devdata->chstat.sent_enbdis);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.sent_promisc = %lu\n",
- devdata->chstat.sent_promisc);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.sent_post = %lu\n",
- devdata->chstat.sent_post);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.sent_post_failed = %lu\n",
- devdata->chstat.sent_post_failed);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.sent_xmit = %lu\n",
- devdata->chstat.sent_xmit);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.reject_count = %lu\n",
- devdata->chstat.reject_count);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " chstat.extra_rcvbufs_sent = %lu\n",
- devdata->chstat.extra_rcvbufs_sent);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " n_rcv0 = %lu\n", devdata->n_rcv0);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " n_rcv1 = %lu\n", devdata->n_rcv1);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " n_rcv2 = %lu\n", devdata->n_rcv2);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " n_rcvx = %lu\n", devdata->n_rcvx);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " num_rcvbuf_in_iovm = %d\n",
- atomic_read(&devdata->num_rcvbuf_in_iovm));
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " alloc_failed_in_if_needed_cnt = %lu\n",
- devdata->alloc_failed_in_if_needed_cnt);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " alloc_failed_in_repost_rtn_cnt = %lu\n",
- devdata->alloc_failed_in_repost_rtn_cnt);
- /* str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- * " inner_loop_limit_reached_cnt = %lu\n",
- * devdata->inner_loop_limit_reached_cnt);
- */
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " found_repost_rcvbuf_cnt = %lu\n",
- devdata->found_repost_rcvbuf_cnt);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " repost_found_skb_cnt = %lu\n",
- devdata->repost_found_skb_cnt);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " n_repost_deficit = %lu\n",
- devdata->n_repost_deficit);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " bad_rcv_buf = %lu\n",
- devdata->bad_rcv_buf);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " n_rcv_packets_not_accepted = %lu\n",
- devdata->n_rcv_packets_not_accepted);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " interrupts_rcvd = %llu\n",
- devdata->interrupts_rcvd);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " interrupts_notme = %llu\n",
- devdata->interrupts_notme);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " interrupts_disabled = %llu\n",
- devdata->interrupts_disabled);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " busy_cnt = %llu\n",
- devdata->busy_cnt);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " flow_control_upper_hits = %llu\n",
- devdata->flow_control_upper_hits);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " flow_control_lower_hits = %llu\n",
- devdata->flow_control_lower_hits);
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " netif_queue = %s\n",
- netif_queue_stopped(devdata->netdev) ?
- "stopped" : "running");
- str_pos += scnprintf(vbuf + str_pos, len - str_pos,
- " xmits_outstanding = %lu\n",
- devdata_xmits_outstanding(devdata));
- }
- rcu_read_unlock();
- bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos);
- kfree(vbuf);
- return bytes_read;
-}
-
-static struct dentry *visornic_debugfs_dir;
-static const struct file_operations debugfs_info_fops = {
- .read = info_debugfs_read,
-};
-
-/* send_rcv_posts_if_needed - send receive buffers to the IO Partition.
- * @devdata: Visornic device.
- */
-static void send_rcv_posts_if_needed(struct visornic_devdata *devdata)
-{
- int i;
- struct net_device *netdev;
- struct uiscmdrsp *cmdrsp = devdata->cmdrsp_rcv;
- int cur_num_rcv_bufs_to_alloc, rcv_bufs_allocated;
- int err;
-
- /* don't do this until vnic is marked ready */
- if (!(devdata->enabled && devdata->enab_dis_acked))
- return;
-
- netdev = devdata->netdev;
- rcv_bufs_allocated = 0;
- /* this code is trying to prevent getting stuck here forever,
- * but still retry it if you can't allocate them all this time.
- */
- cur_num_rcv_bufs_to_alloc = devdata->num_rcv_bufs_could_not_alloc;
- while (cur_num_rcv_bufs_to_alloc > 0) {
- cur_num_rcv_bufs_to_alloc--;
- for (i = 0; i < devdata->num_rcv_bufs; i++) {
- if (devdata->rcvbuf[i])
- continue;
- devdata->rcvbuf[i] = alloc_rcv_buf(netdev);
- if (!devdata->rcvbuf[i]) {
- devdata->alloc_failed_in_if_needed_cnt++;
- break;
- }
- rcv_bufs_allocated++;
- err = post_skb(cmdrsp, devdata, devdata->rcvbuf[i]);
- if (err) {
- kfree_skb(devdata->rcvbuf[i]);
- devdata->rcvbuf[i] = NULL;
- break;
- }
- devdata->chstat.extra_rcvbufs_sent++;
- }
- }
- devdata->num_rcv_bufs_could_not_alloc -= rcv_bufs_allocated;
-}
-
-/* drain_resp_queue - drains and ignores all messages from the resp queue
- * @cmdrsp: IO channel command response message.
- * @devdata: Visornic device to drain.
- */
-static void drain_resp_queue(struct uiscmdrsp *cmdrsp,
- struct visornic_devdata *devdata)
-{
- while (!visorchannel_signalremove(devdata->dev->visorchannel,
- IOCHAN_FROM_IOPART,
- cmdrsp))
- ;
-}
-
-/* service_resp_queue - drain the response queue
- * @cmdrsp: IO channel command response message.
- * @devdata: Visornic device to drain.
- * @rx_work_done:
- * @budget:
- *
- * Drain the response queue of any responses from the IO Partition. Process the
- * responses as we get them.
- */
-static void service_resp_queue(struct uiscmdrsp *cmdrsp,
- struct visornic_devdata *devdata,
- int *rx_work_done, int budget)
-{
- unsigned long flags;
- struct net_device *netdev;
-
- while (*rx_work_done < budget) {
- /* TODO: CLIENT ACQUIRE -- Don't really need this at the
- * moment
- */
- /* queue empty */
- if (visorchannel_signalremove(devdata->dev->visorchannel,
- IOCHAN_FROM_IOPART,
- cmdrsp))
- break;
-
- switch (cmdrsp->net.type) {
- case NET_RCV:
- devdata->chstat.got_rcv++;
- /* process incoming packet */
- *rx_work_done += visornic_rx(cmdrsp);
- break;
- case NET_XMIT_DONE:
- spin_lock_irqsave(&devdata->priv_lock, flags);
- devdata->chstat.got_xmit_done++;
- if (cmdrsp->net.xmtdone.xmt_done_result)
- devdata->chstat.xmit_fail++;
- /* only call queue wake if we stopped it */
- netdev = ((struct sk_buff *)cmdrsp->net.buf)->dev;
- /* ASSERT netdev == vnicinfo->netdev; */
- if (netdev == devdata->netdev &&
- netif_queue_stopped(netdev)) {
- /* check if we have crossed the lower watermark
- * for netif_wake_queue()
- */
- if (vnic_hit_low_watermark
- (devdata,
- devdata->lower_threshold_net_xmits)) {
- /* enough NET_XMITs completed
- * so can restart netif queue
- */
- netif_wake_queue(netdev);
- devdata->flow_control_lower_hits++;
- }
- }
- skb_unlink(cmdrsp->net.buf, &devdata->xmitbufhead);
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- kfree_skb(cmdrsp->net.buf);
- break;
- case NET_RCV_ENBDIS_ACK:
- devdata->chstat.got_enbdisack++;
- netdev = (struct net_device *)
- cmdrsp->net.enbdis.context;
- spin_lock_irqsave(&devdata->priv_lock, flags);
- devdata->enab_dis_acked = 1;
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- if (devdata->server_down &&
- devdata->server_change_state) {
- /* Inform Linux that the link is up */
- devdata->server_down = false;
- devdata->server_change_state = false;
- netif_wake_queue(netdev);
- netif_carrier_on(netdev);
- }
- break;
- case NET_CONNECT_STATUS:
- netdev = devdata->netdev;
- if (cmdrsp->net.enbdis.enable == 1) {
- spin_lock_irqsave(&devdata->priv_lock, flags);
- devdata->enabled = cmdrsp->net.enbdis.enable;
- spin_unlock_irqrestore(&devdata->priv_lock,
- flags);
- netif_wake_queue(netdev);
- netif_carrier_on(netdev);
- } else {
- netif_stop_queue(netdev);
- netif_carrier_off(netdev);
- spin_lock_irqsave(&devdata->priv_lock, flags);
- devdata->enabled = cmdrsp->net.enbdis.enable;
- spin_unlock_irqrestore(&devdata->priv_lock,
- flags);
- }
- break;
- default:
- break;
- }
- /* cmdrsp is now available for reuse */
- }
-}
-
-static int visornic_poll(struct napi_struct *napi, int budget)
-{
- struct visornic_devdata *devdata = container_of(napi,
- struct visornic_devdata,
- napi);
- int rx_count = 0;
-
- send_rcv_posts_if_needed(devdata);
- service_resp_queue(devdata->cmdrsp, devdata, &rx_count, budget);
-
- /* If there aren't any more packets to receive stop the poll */
- if (rx_count < budget)
- napi_complete_done(napi, rx_count);
-
- return rx_count;
-}
-
-/* visornic_channel_interrupt - checks the status of the response queue
- *
- * Main function of the vnic_incoming thread. Periodically check the response
- * queue and drain it if needed.
- */
-static void visornic_channel_interrupt(struct visor_device *dev)
-{
- struct visornic_devdata *devdata = dev_get_drvdata(&dev->device);
-
- if (!devdata)
- return;
-
- if (!visorchannel_signalempty(devdata->dev->visorchannel,
- IOCHAN_FROM_IOPART))
- napi_schedule(&devdata->napi);
-
- atomic_set(&devdata->interrupt_rcvd, 0);
-}
-
-/* visornic_probe - probe function for visornic devices
- * @dev: The visor device discovered.
- *
- * Called when visorbus discovers a visornic device on its bus. It creates a new
- * visornic ethernet adapter.
- *
- * Return: 0 on success, or negative integer on error.
- */
-static int visornic_probe(struct visor_device *dev)
-{
- struct visornic_devdata *devdata = NULL;
- struct net_device *netdev = NULL;
- int err;
- int channel_offset = 0;
- u8 addr[ETH_ALEN];
- u64 features;
-
- netdev = alloc_etherdev(sizeof(struct visornic_devdata));
- if (!netdev) {
- dev_err(&dev->device,
- "%s alloc_etherdev failed\n", __func__);
- return -ENOMEM;
- }
-
- netdev->netdev_ops = &visornic_dev_ops;
- netdev->watchdog_timeo = 5 * HZ;
- SET_NETDEV_DEV(netdev, &dev->device);
-
- /* Get MAC address from channel and read it into the device. */
- netdev->addr_len = ETH_ALEN;
- channel_offset = offsetof(struct visor_io_channel, vnic.macaddr);
- err = visorbus_read_channel(dev, channel_offset, addr, ETH_ALEN);
- if (err < 0) {
- dev_err(&dev->device,
- "%s failed to get mac addr from chan (%d)\n",
- __func__, err);
- goto cleanup_netdev;
- }
- eth_hw_addr_set(netdev, addr);
-
- devdata = devdata_initialize(netdev_priv(netdev), dev);
- if (!devdata) {
- dev_err(&dev->device,
- "%s devdata_initialize failed\n", __func__);
- err = -ENOMEM;
- goto cleanup_netdev;
- }
- /* don't trust messages laying around in the channel */
- drain_resp_queue(devdata->cmdrsp, devdata);
-
- devdata->netdev = netdev;
- dev_set_drvdata(&dev->device, devdata);
- init_waitqueue_head(&devdata->rsp_queue);
- spin_lock_init(&devdata->priv_lock);
- /* not yet */
- devdata->enabled = 0;
- atomic_set(&devdata->usage, 1);
-
- /* Setup rcv bufs */
- channel_offset = offsetof(struct visor_io_channel, vnic.num_rcv_bufs);
- err = visorbus_read_channel(dev, channel_offset,
- &devdata->num_rcv_bufs, 4);
- if (err) {
- dev_err(&dev->device,
- "%s failed to get #rcv bufs from chan (%d)\n",
- __func__, err);
- goto cleanup_netdev;
- }
-
- devdata->rcvbuf = kcalloc(devdata->num_rcv_bufs,
- sizeof(struct sk_buff *), GFP_KERNEL);
- if (!devdata->rcvbuf) {
- err = -ENOMEM;
- goto cleanup_netdev;
- }
-
- /* set the net_xmit outstanding threshold
- * always leave two slots open but you should have 3 at a minimum
- * note that max_outstanding_net_xmits must be > 0
- */
- devdata->max_outstanding_net_xmits =
- max_t(unsigned long, 3, ((devdata->num_rcv_bufs / 3) - 2));
- devdata->upper_threshold_net_xmits =
- max_t(unsigned long,
- 2, (devdata->max_outstanding_net_xmits - 1));
- devdata->lower_threshold_net_xmits =
- max_t(unsigned long,
- 1, (devdata->max_outstanding_net_xmits / 2));
-
- skb_queue_head_init(&devdata->xmitbufhead);
-
- /* create a cmdrsp we can use to post and unpost rcv buffers */
- devdata->cmdrsp_rcv = kmalloc(SIZEOF_CMDRSP, GFP_KERNEL);
- if (!devdata->cmdrsp_rcv) {
- err = -ENOMEM;
- goto cleanup_rcvbuf;
- }
- devdata->xmit_cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_KERNEL);
- if (!devdata->xmit_cmdrsp) {
- err = -ENOMEM;
- goto cleanup_cmdrsp_rcv;
- }
- INIT_WORK(&devdata->timeout_reset, visornic_timeout_reset);
- devdata->server_down = false;
- devdata->server_change_state = false;
-
- /*set the default mtu */
- channel_offset = offsetof(struct visor_io_channel, vnic.mtu);
- err = visorbus_read_channel(dev, channel_offset, &netdev->mtu, 4);
- if (err) {
- dev_err(&dev->device,
- "%s failed to get mtu from chan (%d)\n",
- __func__, err);
- goto cleanup_xmit_cmdrsp;
- }
-
- /* TODO: Setup Interrupt information */
- /* Let's start our threads to get responses */
- netif_napi_add(netdev, &devdata->napi, visornic_poll, NAPI_WEIGHT);
-
- channel_offset = offsetof(struct visor_io_channel,
- channel_header.features);
- err = visorbus_read_channel(dev, channel_offset, &features, 8);
- if (err) {
- dev_err(&dev->device,
- "%s failed to get features from chan (%d)\n",
- __func__, err);
- goto cleanup_napi_add;
- }
-
- features |= VISOR_CHANNEL_IS_POLLING;
- features |= VISOR_DRIVER_ENHANCED_RCVBUF_CHECKING;
- err = visorbus_write_channel(dev, channel_offset, &features, 8);
- if (err) {
- dev_err(&dev->device,
- "%s failed to set features in chan (%d)\n",
- __func__, err);
- goto cleanup_napi_add;
- }
-
- /* Note: Interrupts have to be enable before the while
- * loop below because the napi routine is responsible for
- * setting enab_dis_acked
- */
- visorbus_enable_channel_interrupts(dev);
-
- err = register_netdev(netdev);
- if (err) {
- dev_err(&dev->device,
- "%s register_netdev failed (%d)\n", __func__, err);
- goto cleanup_napi_add;
- }
-
- dev_info(&dev->device, "%s success netdev=%s\n",
- __func__, netdev->name);
- return 0;
-
-cleanup_napi_add:
- visorbus_disable_channel_interrupts(dev);
- netif_napi_del(&devdata->napi);
-
-cleanup_xmit_cmdrsp:
- kfree(devdata->xmit_cmdrsp);
-
-cleanup_cmdrsp_rcv:
- kfree(devdata->cmdrsp_rcv);
-
-cleanup_rcvbuf:
- kfree(devdata->rcvbuf);
-
-cleanup_netdev:
- free_netdev(netdev);
- return err;
-}
-
-/* host_side_disappeared - IO Partition is gone
- * @devdata: Device object.
- *
- * IO partition servicing this device is gone; do cleanup.
- */
-static void host_side_disappeared(struct visornic_devdata *devdata)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&devdata->priv_lock, flags);
- /* indicate device destroyed */
- devdata->dev = NULL;
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-}
-
-/* visornic_remove - called when visornic dev goes away
- * @dev: Visornic device that is being removed.
- *
- * Called when DEVICE_DESTROY gets called to remove device.
- */
-static void visornic_remove(struct visor_device *dev)
-{
- struct visornic_devdata *devdata = dev_get_drvdata(&dev->device);
- struct net_device *netdev;
- unsigned long flags;
-
- if (!devdata) {
- dev_err(&dev->device, "%s no devdata\n", __func__);
- return;
- }
- spin_lock_irqsave(&devdata->priv_lock, flags);
- if (devdata->going_away) {
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- dev_err(&dev->device, "%s already being removed\n", __func__);
- return;
- }
- devdata->going_away = true;
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- netdev = devdata->netdev;
- if (!netdev) {
- dev_err(&dev->device, "%s not net device\n", __func__);
- return;
- }
-
- /* going_away prevents new items being added to the workqueues */
- cancel_work_sync(&devdata->timeout_reset);
-
- /* this will call visornic_close() */
- unregister_netdev(netdev);
-
- visorbus_disable_channel_interrupts(devdata->dev);
- netif_napi_del(&devdata->napi);
-
- dev_set_drvdata(&dev->device, NULL);
- host_side_disappeared(devdata);
- devdata_release(devdata);
- free_netdev(netdev);
-}
-
-/* visornic_pause - called when IO Part disappears
- * @dev: Visornic device that is being serviced.
- * @complete_func: Call when finished.
- *
- * Called when the IO Partition has gone down. Need to free up resources and
- * wait for IO partition to come back. Mark link as down and don't attempt any
- * DMA. When we have freed memory, call the complete_func so that Command knows
- * we are done. If we don't call complete_func, the IO Partition will never
- * come back.
- *
- * Return: 0 on success.
- */
-static int visornic_pause(struct visor_device *dev,
- visorbus_state_complete_func complete_func)
-{
- struct visornic_devdata *devdata = dev_get_drvdata(&dev->device);
-
- visornic_serverdown(devdata, complete_func);
- return 0;
-}
-
-/* visornic_resume - called when IO Partition has recovered
- * @dev: Visornic device that is being serviced.
- * @compelte_func: Call when finished.
- *
- * Called when the IO partition has recovered. Re-establish connection to the IO
- * Partition and set the link up. Okay to do DMA again.
- *
- * Returns 0 for success, negative integer on error.
- */
-static int visornic_resume(struct visor_device *dev,
- visorbus_state_complete_func complete_func)
-{
- struct visornic_devdata *devdata;
- struct net_device *netdev;
- unsigned long flags;
-
- devdata = dev_get_drvdata(&dev->device);
- if (!devdata) {
- dev_err(&dev->device, "%s no devdata\n", __func__);
- return -EINVAL;
- }
-
- netdev = devdata->netdev;
-
- spin_lock_irqsave(&devdata->priv_lock, flags);
- if (devdata->server_change_state) {
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- dev_err(&dev->device, "%s server already changing state\n",
- __func__);
- return -EINVAL;
- }
- if (!devdata->server_down) {
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
- dev_err(&dev->device, "%s server not down\n", __func__);
- complete_func(dev, 0);
- return 0;
- }
- devdata->server_change_state = true;
- spin_unlock_irqrestore(&devdata->priv_lock, flags);
-
- /* Must transition channel to ATTACHED state BEFORE
- * we can start using the device again.
- * TODO: State transitions
- */
- visorbus_enable_channel_interrupts(dev);
-
- rtnl_lock();
- dev_open(netdev, NULL);
- rtnl_unlock();
-
- complete_func(dev, 0);
- return 0;
-}
-
-/* This is used to tell the visorbus driver which types of visor devices
- * we support, and what functions to call when a visor device that we support
- * is attached or removed.
- */
-static struct visor_driver visornic_driver = {
- .name = "visornic",
- .owner = THIS_MODULE,
- .channel_types = visornic_channel_types,
- .probe = visornic_probe,
- .remove = visornic_remove,
- .pause = visornic_pause,
- .resume = visornic_resume,
- .channel_interrupt = visornic_channel_interrupt,
-};
-
-/* visornic_init - init function
- *
- * Init function for the visornic driver. Do initial driver setup and wait
- * for devices.
- *
- * Return: 0 on success, negative integer on error.
- */
-static int visornic_init(void)
-{
- int err;
-
- visornic_debugfs_dir = debugfs_create_dir("visornic", NULL);
-
- debugfs_create_file("info", 0400, visornic_debugfs_dir, NULL,
- &debugfs_info_fops);
- debugfs_create_file("enable_ints", 0200, visornic_debugfs_dir, NULL,
- &debugfs_enable_ints_fops);
-
- err = visorbus_register_visor_driver(&visornic_driver);
- if (err)
- debugfs_remove_recursive(visornic_debugfs_dir);
-
- return err;
-}
-
-/* visornic_cleanup - driver exit routine
- *
- * Unregister driver from the bus and free up memory.
- */
-static void visornic_cleanup(void)
-{
- visorbus_unregister_visor_driver(&visornic_driver);
- debugfs_remove_recursive(visornic_debugfs_dir);
-}
-
-module_init(visornic_init);
-module_exit(visornic_cleanup);
-
-MODULE_AUTHOR("Unisys");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("s-Par NIC driver for virtual network devices");
diff --git a/drivers/visorbus/Kconfig b/drivers/visorbus/Kconfig
deleted file mode 100644
index fa947a79b5cd00ef6f74f1f589c2808e6d0ffc49..0000000000000000000000000000000000000000
--- a/drivers/visorbus/Kconfig
+++ /dev/null
@@ -1,15 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Unisys visorbus configuration
-#
-
-config UNISYS_VISORBUS
- tristate "Unisys visorbus driver"
- depends on X86_64 && ACPI
- help
- The visorbus driver is a virtualized bus for the Unisys s-Par firmware.
- Virtualized devices allow Linux guests on a system to share disks and
- network cards that do not have SR-IOV support, and to be accessed using
- the partition desktop application. The visorbus driver is required to
- discover devices on an s-Par guest, and must be present for any other
- s-Par guest driver to function correctly.
diff --git a/drivers/visorbus/Makefile b/drivers/visorbus/Makefile
deleted file mode 100644
index e8df59d1301f187ce7e7760c835527d5c52888fa..0000000000000000000000000000000000000000
--- a/drivers/visorbus/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for Unisys visorbus
-#
-
-obj-$(CONFIG_UNISYS_VISORBUS) += visorbus.o
-
-visorbus-y := visorbus_main.o
-visorbus-y += visorchannel.o
-visorbus-y += visorchipset.o
diff --git a/drivers/visorbus/controlvmchannel.h b/drivers/visorbus/controlvmchannel.h
deleted file mode 100644
index c8721355442789a0a4d25a5cdc58973783d2a79d..0000000000000000000000000000000000000000
--- a/drivers/visorbus/controlvmchannel.h
+++ /dev/null
@@ -1,650 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2010 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-#ifndef __CONTROLVMCHANNEL_H__
-#define __CONTROLVMCHANNEL_H__
-
-#include <linux/uuid.h>
-#include <linux/visorbus.h>
-
-/* {2B3C2D10-7EF5-4ad8-B966-3448B7386B3D} */
-#define VISOR_CONTROLVM_CHANNEL_GUID \
- GUID_INIT(0x2b3c2d10, 0x7ef5, 0x4ad8, \
- 0xb9, 0x66, 0x34, 0x48, 0xb7, 0x38, 0x6b, 0x3d)
-
-#define CONTROLVM_MESSAGE_MAX 64
-
-/*
- * Must increment this whenever you insert or delete fields within this channel
- * struct. Also increment whenever you change the meaning of fields within this
- * channel struct so as to break pre-existing software. Note that you can
- * usually add fields to the END of the channel struct withOUT needing to
- * increment this.
- */
-#define VISOR_CONTROLVM_CHANNEL_VERSIONID 1
-
-/* Defines for various channel queues */
-#define CONTROLVM_QUEUE_REQUEST 0
-#define CONTROLVM_QUEUE_RESPONSE 1
-#define CONTROLVM_QUEUE_EVENT 2
-#define CONTROLVM_QUEUE_ACK 3
-
-/* Max num of messages stored during IOVM creation to be reused after crash */
-#define CONTROLVM_CRASHMSG_MAX 2
-
-/*
- * struct visor_segment_state
- * @enabled: May enter other states.
- * @active: Assigned to active partition.
- * @alive: Configure message sent to service/server.
- * @revoked: Similar to partition state ShuttingDown.
- * @allocated: Memory (device/port number) has been selected by Command.
- * @known: Has been introduced to the service/guest partition.
- * @ready: Service/Guest partition has responded to introduction.
- * @operating: Resource is configured and operating.
- * @reserved: Natural alignment.
- *
- * Note: Don't use high bit unless we need to switch to ushort which is
- * non-compliant.
- */
-struct visor_segment_state {
- u16 enabled:1;
- u16 active:1;
- u16 alive:1;
- u16 revoked:1;
- u16 allocated:1;
- u16 known:1;
- u16 ready:1;
- u16 operating:1;
- u16 reserved:8;
-} __packed;
-
-static const struct visor_segment_state segment_state_running = {
- 1, 1, 1, 0, 1, 1, 1, 1
-};
-
-static const struct visor_segment_state segment_state_paused = {
- 1, 1, 1, 0, 1, 1, 1, 0
-};
-
-static const struct visor_segment_state segment_state_standby = {
- 1, 1, 0, 0, 1, 1, 1, 0
-};
-
-/*
- * enum controlvm_id
- * @CONTROLVM_INVALID:
- * @CONTROLVM_BUS_CREATE: CP --> SP, GP.
- * @CONTROLVM_BUS_DESTROY: CP --> SP, GP.
- * @CONTROLVM_BUS_CONFIGURE: CP --> SP.
- * @CONTROLVM_BUS_CHANGESTATE: CP --> SP, GP.
- * @CONTROLVM_BUS_CHANGESTATE_EVENT: SP, GP --> CP.
- * @CONTROLVM_DEVICE_CREATE: CP --> SP, GP.
- * @CONTROLVM_DEVICE_DESTROY: CP --> SP, GP.
- * @CONTROLVM_DEVICE_CONFIGURE: CP --> SP.
- * @CONTROLVM_DEVICE_CHANGESTATE: CP --> SP, GP.
- * @CONTROLVM_DEVICE_CHANGESTATE_EVENT: SP, GP --> CP.
- * @CONTROLVM_DEVICE_RECONFIGURE: CP --> Boot.
- * @CONTROLVM_CHIPSET_INIT: CP --> SP, GP.
- * @CONTROLVM_CHIPSET_STOP: CP --> SP, GP.
- * @CONTROLVM_CHIPSET_READY: CP --> SP.
- * @CONTROLVM_CHIPSET_SELFTEST: CP --> SP.
- *
- * Ids for commands that may appear in either queue of a ControlVm channel.
- *
- * Commands that are initiated by the command partition (CP), by an IO or
- * console service partition (SP), or by a guest partition (GP) are:
- * - issued on the RequestQueue queue (q #0) in the ControlVm channel
- * - responded to on the ResponseQueue queue (q #1) in the ControlVm channel
- *
- * Events that are initiated by an IO or console service partition (SP) or
- * by a guest partition (GP) are:
- * - issued on the EventQueue queue (q #2) in the ControlVm channel
- * - responded to on the EventAckQueue queue (q #3) in the ControlVm channel
- */
-enum controlvm_id {
- CONTROLVM_INVALID = 0,
- /*
- * SWITCH commands required Parameter: SwitchNumber.
- * BUS commands required Parameter: BusNumber
- */
- CONTROLVM_BUS_CREATE = 0x101,
- CONTROLVM_BUS_DESTROY = 0x102,
- CONTROLVM_BUS_CONFIGURE = 0x104,
- CONTROLVM_BUS_CHANGESTATE = 0x105,
- CONTROLVM_BUS_CHANGESTATE_EVENT = 0x106,
- /* DEVICE commands required Parameter: BusNumber, DeviceNumber */
- CONTROLVM_DEVICE_CREATE = 0x201,
- CONTROLVM_DEVICE_DESTROY = 0x202,
- CONTROLVM_DEVICE_CONFIGURE = 0x203,
- CONTROLVM_DEVICE_CHANGESTATE = 0x204,
- CONTROLVM_DEVICE_CHANGESTATE_EVENT = 0x205,
- CONTROLVM_DEVICE_RECONFIGURE = 0x206,
- /* CHIPSET commands */
- CONTROLVM_CHIPSET_INIT = 0x301,
- CONTROLVM_CHIPSET_STOP = 0x302,
- CONTROLVM_CHIPSET_READY = 0x304,
- CONTROLVM_CHIPSET_SELFTEST = 0x305,
-};
-
-/*
- * struct irq_info
- * @reserved1: Natural alignment purposes
- * @recv_irq_handle: Specifies interrupt handle. It is used to retrieve the
- * corresponding interrupt pin from Monitor; and the interrupt
- * pin is used to connect to the corresponding interrupt.
- * Used by IOPart-GP only.
- * @recv_irq_vector: Specifies interrupt vector. It, interrupt pin, and shared
- * are used to connect to the corresponding interrupt.
- * Used by IOPart-GP only.
- * @recv_irq_shared: Specifies if the recvInterrupt is shared. It, interrupt
- * pin and vector are used to connect to 0 = not shared;
- * 1 = shared the corresponding interrupt.
- * Used by IOPart-GP only.
- * @reserved: Natural alignment purposes
- */
-struct irq_info {
- u64 reserved1;
- u64 recv_irq_handle;
- u32 recv_irq_vector;
- u8 recv_irq_shared;
- u8 reserved[3];
-} __packed;
-
-/*
- * struct efi_visor_indication
- * @boot_to_fw_ui: Stop in UEFI UI
- * @clear_nvram: Clear NVRAM
- * @clear_cmos: Clear CMOS
- * @boot_to_tool: Run install tool
- * @reserved: Natural alignment
- */
-struct efi_visor_indication {
- u64 boot_to_fw_ui:1;
- u64 clear_nvram:1;
- u64 clear_cmos:1;
- u64 boot_to_tool:1;
- /* Remaining bits are available */
- u64 reserved:60;
-} __packed;
-
-enum visor_chipset_feature {
- VISOR_CHIPSET_FEATURE_REPLY = 0x00000001,
- VISOR_CHIPSET_FEATURE_PARA_HOTPLUG = 0x00000002,
-};
-
-/*
- * struct controlvm_message_header
- * @id: See CONTROLVM_ID.
- * @message_size: Includes size of this struct + size of message.
- * @segment_index: Index of segment containing Vm message/information.
- * @completion_status: Error status code or result of message completion.
- * @struct flags:
- * @failed: =1 in a response to signify failure.
- * @response_expected: =1 in all messages that expect a response.
- * @server: =1 in all bus & device-related messages where the
- * message receiver is to act as the bus or device
- * server.
- * @test_message: =1 for testing use only (Control and Command
- * ignore this).
- * @partial_completion: =1 if there are forthcoming responses/acks
- * associated with this message.
- * @preserve: =1 this is to let us know to preserve channel
- * contents.
- * @writer_in_diag: =1 the DiagWriter is active in the Diagnostic
- * Partition.
- * @reserve: Natural alignment.
- * @reserved: Natural alignment.
- * @message_handle: Identifies the particular message instance.
- * @payload_vm_offset: Offset of payload area from start of this instance.
- * @payload_max_bytes: Maximum bytes allocated in payload area of ControlVm
- * segment.
- * @payload_bytes: Actual number of bytes of payload area to copy between
- * IO/Command. If non-zero, there is a payload to copy.
- *
- * This is the common structure that is at the beginning of every
- * ControlVm message (both commands and responses) in any ControlVm
- * queue. Commands are easily distinguished from responses by
- * looking at the flags.response field.
- */
-struct controlvm_message_header {
- u32 id;
- /*
- * For requests, indicates the message type. For responses, indicates
- * the type of message we are responding to.
- */
- u32 message_size;
- u32 segment_index;
- u32 completion_status;
- struct {
- u32 failed:1;
- u32 response_expected:1;
- u32 server:1;
- u32 test_message:1;
- u32 partial_completion:1;
- u32 preserve:1;
- u32 writer_in_diag:1;
- u32 reserve:25;
- } __packed flags;
- u32 reserved;
- u64 message_handle;
- u64 payload_vm_offset;
- u32 payload_max_bytes;
- u32 payload_bytes;
-} __packed;
-
-/*
- * struct controlvm_packet_device_create - For CONTROLVM_DEVICE_CREATE
- * @bus_no: Bus # (0..n-1) from the msg receiver's end.
- * @dev_no: Bus-relative (0..n-1) device number.
- * @channel_addr: Guest physical address of the channel, which can be
- * dereferenced by the receiver of this ControlVm command.
- * @channel_bytes: Specifies size of the channel in bytes.
- * @data_type_uuid: Specifies format of data in channel.
- * @dev_inst_uuid: Instance guid for the device.
- * @irq_info intr: Specifies interrupt information.
- */
-struct controlvm_packet_device_create {
- u32 bus_no;
- u32 dev_no;
- u64 channel_addr;
- u64 channel_bytes;
- guid_t data_type_guid;
- guid_t dev_inst_guid;
- struct irq_info intr;
-} __packed;
-
-/*
- * struct controlvm_packet_device_configure - For CONTROLVM_DEVICE_CONFIGURE
- * @bus_no: Bus number (0..n-1) from the msg receiver's perspective.
- * @dev_no: Bus-relative (0..n-1) device number.
- */
-struct controlvm_packet_device_configure {
- u32 bus_no;
- u32 dev_no;
-} __packed;
-
-/* Total 128 bytes */
-struct controlvm_message_device_create {
- struct controlvm_message_header header;
- struct controlvm_packet_device_create packet;
-} __packed;
-
-/* Total 56 bytes */
-struct controlvm_message_device_configure {
- struct controlvm_message_header header;
- struct controlvm_packet_device_configure packet;
-} __packed;
-
-/*
- * struct controlvm_message_packet - This is the format for a message in any
- * ControlVm queue.
- * @struct create_bus: For CONTROLVM_BUS_CREATE.
- * @bus_no: Bus # (0..n-1) from the msg receiver's perspective.
- * @dev_count: Indicates the max number of devices on this bus.
- * @channel_addr: Guest physical address of the channel, which can be
- * dereferenced by the receiver of this ControlVM
- * command.
- * @channel_bytes: Size of the channel.
- * @bus_data_type_uuid: Indicates format of data in bus channel.
- * @bus_inst_uuid: Instance uuid for the bus.
- *
- * @struct destroy_bus: For CONTROLVM_BUS_DESTROY.
- * @bus_no: Bus # (0..n-1) from the msg receiver's perspective.
- * @reserved: Natural alignment purposes.
- *
- * @struct configure_bus: For CONTROLVM_BUS_CONFIGURE.
- * @bus_no: Bus # (0..n-1) from the receiver's perspective.
- * @reserved1: For alignment purposes.
- * @guest_handle: This is used to convert guest physical address to
- * physical address.
- * @recv_bus_irq_handle: Specifies interrupt info. It is used by SP to
- * register to receive interrupts from the CP. This
- * interrupt is used for bus level notifications.
- * The corresponding sendBusInterruptHandle is kept
- * in CP.
- *
- * @struct create_device: For CONTROLVM_DEVICE_CREATE.
- *
- * @struct destroy_device: For CONTROLVM_DEVICE_DESTROY.
- * @bus_no: Bus # (0..n-1) from the msg receiver's perspective.
- * @dev_no: Bus-relative (0..n-1) device number.
- *
- * @struct configure_device: For CONTROLVM_DEVICE_CONFIGURE.
- *
- * @struct reconfigure_device: For CONTROLVM_DEVICE_RECONFIGURE.
- * @bus_no: Bus # (0..n-1) from the msg receiver's perspective.
- * @dev_no: Bus-relative (0..n-1) device number.
- *
- * @struct bus_change_state: For CONTROLVM_BUS_CHANGESTATE.
- * @bus_no:
- * @struct state:
- * @reserved: Natural alignment purposes.
- *
- * @struct device_change_state: For CONTROLVM_DEVICE_CHANGESTATE.
- * @bus_no:
- * @dev_no:
- * @struct state:
- * @struct flags:
- * @phys_device: =1 if message is for a physical device.
- * @reserved: Natural alignment.
- * @reserved1: Natural alignment.
- * @reserved: Natural alignment purposes.
- *
- * @struct device_change_state_event: For CONTROLVM_DEVICE_CHANGESTATE_EVENT.
- * @bus_no:
- * @dev_no:
- * @struct state:
- * @reserved: Natural alignment purposes.
- *
- * @struct init_chipset: For CONTROLVM_CHIPSET_INIT.
- * @bus_count: Indicates the max number of busses.
- * @switch_count: Indicates the max number of switches.
- * @enum features:
- * @platform_number:
- *
- * @struct chipset_selftest: For CONTROLVM_CHIPSET_SELFTEST.
- * @options: Reserved.
- * @test: Bit 0 set to run embedded selftest.
- *
- * @addr: A physical address of something, that can be dereferenced by the
- * receiver of this ControlVm command.
- *
- * @handle: A handle of something (depends on command id).
- */
-struct controlvm_message_packet {
- union {
- struct {
- u32 bus_no;
- u32 dev_count;
- u64 channel_addr;
- u64 channel_bytes;
- guid_t bus_data_type_guid;
- guid_t bus_inst_guid;
- } __packed create_bus;
- struct {
- u32 bus_no;
- u32 reserved;
- } __packed destroy_bus;
- struct {
- u32 bus_no;
- u32 reserved1;
- u64 guest_handle;
- u64 recv_bus_irq_handle;
- } __packed configure_bus;
- struct controlvm_packet_device_create create_device;
- struct {
- u32 bus_no;
- u32 dev_no;
- } __packed destroy_device;
- struct controlvm_packet_device_configure configure_device;
- struct {
- u32 bus_no;
- u32 dev_no;
- } __packed reconfigure_device;
- struct {
- u32 bus_no;
- struct visor_segment_state state;
- u8 reserved[2];
- } __packed bus_change_state;
- struct {
- u32 bus_no;
- u32 dev_no;
- struct visor_segment_state state;
- struct {
- u32 phys_device:1;
- u32 reserved:31;
- u32 reserved1;
- } __packed flags;
- u8 reserved[2];
- } __packed device_change_state;
- struct {
- u32 bus_no;
- u32 dev_no;
- struct visor_segment_state state;
- u8 reserved[6];
- } __packed device_change_state_event;
- struct {
- u32 bus_count;
- u32 switch_count;
- enum visor_chipset_feature features;
- u32 platform_number;
- } __packed init_chipset;
- struct {
- u32 options;
- u32 test;
- } __packed chipset_selftest;
- u64 addr;
- u64 handle;
- };
-} __packed;
-
-/* All messages in any ControlVm queue have this layout. */
-struct controlvm_message {
- struct controlvm_message_header hdr;
- struct controlvm_message_packet cmd;
-} __packed;
-
-/*
- * struct visor_controlvm_channel
- * @struct header:
- * @gp_controlvm: Guest phys addr of this channel.
- * @gp_partition_tables: Guest phys addr of partition tables.
- * @gp_diag_guest: Guest phys addr of diagnostic channel.
- * @gp_boot_romdisk: Guest phys addr of (read* only) Boot
- * ROM disk.
- * @gp_boot_ramdisk: Guest phys addr of writable Boot RAM
- * disk.
- * @gp_acpi_table: Guest phys addr of acpi table.
- * @gp_control_channel: Guest phys addr of control channel.
- * @gp_diag_romdisk: Guest phys addr of diagnostic ROM disk.
- * @gp_nvram: Guest phys addr of NVRAM channel.
- * @request_payload_offset: Offset to request payload area.
- * @event_payload_offset: Offset to event payload area.
- * @request_payload_bytes: Bytes available in request payload area.
- * @event_payload_bytes: Bytes available in event payload area.
- * @control_channel_bytes:
- * @nvram_channel_bytes: Bytes in PartitionNvram segment.
- * @message_bytes: sizeof(CONTROLVM_MESSAGE).
- * @message_count: CONTROLVM_MESSAGE_MAX.
- * @gp_smbios_table: Guest phys addr of SMBIOS tables.
- * @gp_physical_smbios_table: Guest phys addr of SMBIOS table.
- * @gp_reserved: VISOR_MAX_GUESTS_PER_SERVICE.
- * @virtual_guest_firmware_image_base: Guest physical address of EFI firmware
- * image base.
- * @virtual_guest_firmware_entry_point: Guest physical address of EFI firmware
- * entry point.
- * @virtual_guest_firmware_image_size: Guest EFI firmware image size.
- * @virtual_guest_firmware_boot_base: GPA = 1MB where EFI firmware image is
- * copied to.
- * @virtual_guest_image_base:
- * @virtual_guest_image_size:
- * @prototype_control_channel_offset:
- * @virtual_guest_partition_handle:
- * @restore_action: Restore Action field to restore the
- * guest partition.
- * @dump_action: For Windows guests it shows if the
- * visordisk is in dump mode.
- * @nvram_fail_count:
- * @saved_crash_message_count: = CONTROLVM_CRASHMSG_MAX.
- * @saved_crash_message_offset: Offset to request payload area needed
- * for crash dump.
- * @installation_error: Type of error encountered during
- * installation.
- * @installation_text_id: Id of string to display.
- * @installation_remaining_steps: Number of remaining installation steps
- * (for progress bars).
- * @tool_action: VISOR_TOOL_ACTIONS Installation Action
- * field.
- * @reserved: Alignment.
- * @struct efi_visor_ind:
- * @sp_reserved:
- * @reserved2: Force signals to begin on 128-byte
- * cache line.
- * @struct request_queue: Guest partition uses this queue to send
- * requests to Control.
- * @struct response_queue: Control uses this queue to respond to
- * service or guest partition request.
- * @struct event_queue: Control uses this queue to send events
- * to guest partition.
- * @struct event_ack_queue: Service or guest partition uses this
- * queue to ack Control events.
- * @struct request_msg: Request fixed-size message pool -
- * does not include payload.
- * @struct response_msg: Response fixed-size message pool -
- * does not include payload.
- * @struct event_msg: Event fixed-size message pool -
- * does not include payload.
- * @struct event_ack_msg: Ack fixed-size message pool -
- * does not include payload.
- * @struct saved_crash_msg: Message stored during IOVM creation to
- * be reused after crash.
- */
-struct visor_controlvm_channel {
- struct channel_header header;
- u64 gp_controlvm;
- u64 gp_partition_tables;
- u64 gp_diag_guest;
- u64 gp_boot_romdisk;
- u64 gp_boot_ramdisk;
- u64 gp_acpi_table;
- u64 gp_control_channel;
- u64 gp_diag_romdisk;
- u64 gp_nvram;
- u64 request_payload_offset;
- u64 event_payload_offset;
- u32 request_payload_bytes;
- u32 event_payload_bytes;
- u32 control_channel_bytes;
- u32 nvram_channel_bytes;
- u32 message_bytes;
- u32 message_count;
- u64 gp_smbios_table;
- u64 gp_physical_smbios_table;
- char gp_reserved[2688];
- u64 virtual_guest_firmware_image_base;
- u64 virtual_guest_firmware_entry_point;
- u64 virtual_guest_firmware_image_size;
- u64 virtual_guest_firmware_boot_base;
- u64 virtual_guest_image_base;
- u64 virtual_guest_image_size;
- u64 prototype_control_channel_offset;
- u64 virtual_guest_partition_handle;
- u16 restore_action;
- u16 dump_action;
- u16 nvram_fail_count;
- u16 saved_crash_message_count;
- u32 saved_crash_message_offset;
- u32 installation_error;
- u32 installation_text_id;
- u16 installation_remaining_steps;
- u8 tool_action;
- u8 reserved;
- struct efi_visor_indication efi_visor_ind;
- u32 sp_reserved;
- u8 reserved2[28];
- struct signal_queue_header request_queue;
- struct signal_queue_header response_queue;
- struct signal_queue_header event_queue;
- struct signal_queue_header event_ack_queue;
- struct controlvm_message request_msg[CONTROLVM_MESSAGE_MAX];
- struct controlvm_message response_msg[CONTROLVM_MESSAGE_MAX];
- struct controlvm_message event_msg[CONTROLVM_MESSAGE_MAX];
- struct controlvm_message event_ack_msg[CONTROLVM_MESSAGE_MAX];
- struct controlvm_message saved_crash_msg[CONTROLVM_CRASHMSG_MAX];
-} __packed;
-
-/*
- * struct visor_controlvm_parameters_header
- *
- * The following header will be located at the beginning of PayloadVmOffset for
- * various ControlVm commands. The receiver of a ControlVm command with a
- * PayloadVmOffset will dereference this address and then use connection_offset,
- * initiator_offset, and target_offset to get the location of UTF-8 formatted
- * strings that can be parsed to obtain command-specific information. The value
- * of total_length should equal PayloadBytes. The format of the strings at
- * PayloadVmOffset will take different forms depending on the message.
- */
-struct visor_controlvm_parameters_header {
- u32 total_length;
- u32 header_length;
- u32 connection_offset;
- u32 connection_length;
- u32 initiator_offset;
- u32 initiator_length;
- u32 target_offset;
- u32 target_length;
- u32 client_offset;
- u32 client_length;
- u32 name_offset;
- u32 name_length;
- guid_t id;
- u32 revision;
- /* Natural alignment */
- u32 reserved;
-} __packed;
-
-/* General Errors------------------------------------------------------[0-99] */
-#define CONTROLVM_RESP_SUCCESS 0
-#define CONTROLVM_RESP_ALREADY_DONE 1
-#define CONTROLVM_RESP_IOREMAP_FAILED 2
-#define CONTROLVM_RESP_KMALLOC_FAILED 3
-#define CONTROLVM_RESP_ID_UNKNOWN 4
-#define CONTROLVM_RESP_ID_INVALID_FOR_CLIENT 5
-/* CONTROLVM_INIT_CHIPSET-------------------------------------------[100-199] */
-#define CONTROLVM_RESP_CLIENT_SWITCHCOUNT_NONZERO 100
-#define CONTROLVM_RESP_EXPECTED_CHIPSET_INIT 101
-/* Maximum Limit----------------------------------------------------[200-299] */
-/* BUS_CREATE */
-#define CONTROLVM_RESP_ERROR_MAX_BUSES 201
-/* DEVICE_CREATE */
-#define CONTROLVM_RESP_ERROR_MAX_DEVICES 202
-/* Payload and Parameter Related------------------------------------[400-499] */
-/* SWITCH_ATTACHEXTPORT, DEVICE_CONFIGURE */
-#define CONTROLVM_RESP_PAYLOAD_INVALID 400
-/* Multiple */
-#define CONTROLVM_RESP_INITIATOR_PARAMETER_INVALID 401
-/* DEVICE_CONFIGURE */
-#define CONTROLVM_RESP_TARGET_PARAMETER_INVALID 402
-/* DEVICE_CONFIGURE */
-#define CONTROLVM_RESP_CLIENT_PARAMETER_INVALID 403
-/* Specified[Packet Structure] Value--------------------------------[500-599] */
-/* SWITCH_ATTACHINTPORT */
-/* BUS_CONFIGURE, DEVICE_CREATE, DEVICE_CONFIG, DEVICE_DESTROY */
-#define CONTROLVM_RESP_BUS_INVALID 500
-/* SWITCH_ATTACHINTPORT*/
-/* DEVICE_CREATE, DEVICE_CONFIGURE, DEVICE_DESTROY */
-#define CONTROLVM_RESP_DEVICE_INVALID 501
-/* DEVICE_CREATE, DEVICE_CONFIGURE */
-#define CONTROLVM_RESP_CHANNEL_INVALID 502
-/* Partition Driver Callback Interface------------------------------[600-699] */
-/* BUS_CREATE, BUS_DESTROY, DEVICE_CREATE, DEVICE_DESTROY */
-#define CONTROLVM_RESP_VIRTPCI_DRIVER_FAILURE 604
-/* Unable to invoke VIRTPCI callback. VIRTPCI Callback returned error. */
-/* BUS_CREATE, BUS_DESTROY, DEVICE_CREATE, DEVICE_DESTROY */
-#define CONTROLVM_RESP_VIRTPCI_DRIVER_CALLBACK_ERROR 605
-/* Generic device callback returned error. */
-/* SWITCH_ATTACHEXTPORT, SWITCH_DETACHEXTPORT, DEVICE_CONFIGURE */
-#define CONTROLVM_RESP_GENERIC_DRIVER_CALLBACK_ERROR 606
-/* Bus Related------------------------------------------------------[700-799] */
-/* BUS_DESTROY */
-#define CONTROLVM_RESP_ERROR_BUS_DEVICE_ATTACHED 700
-/* Channel Related--------------------------------------------------[800-899] */
-/* GET_CHANNELINFO, DEVICE_DESTROY */
-#define CONTROLVM_RESP_CHANNEL_TYPE_UNKNOWN 800
-/* DEVICE_CREATE */
-#define CONTROLVM_RESP_CHANNEL_SIZE_TOO_SMALL 801
-/* Chipset Shutdown Related---------------------------------------[1000-1099] */
-#define CONTROLVM_RESP_CHIPSET_SHUTDOWN_FAILED 1000
-#define CONTROLVM_RESP_CHIPSET_SHUTDOWN_ALREADY_ACTIVE 1001
-/* Chipset Stop Related-------------------------------------------[1100-1199] */
-#define CONTROLVM_RESP_CHIPSET_STOP_FAILED_BUS 1100
-#define CONTROLVM_RESP_CHIPSET_STOP_FAILED_SWITCH 1101
-/* Device Related-------------------------------------------------[1400-1499] */
-#define CONTROLVM_RESP_DEVICE_UDEV_TIMEOUT 1400
-
-/* __CONTROLVMCHANNEL_H__ */
-#endif
diff --git a/drivers/visorbus/vbuschannel.h b/drivers/visorbus/vbuschannel.h
deleted file mode 100644
index 98711fb6d66e3a818762a4f213ee17ee52c5dc76..0000000000000000000000000000000000000000
--- a/drivers/visorbus/vbuschannel.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2010 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-#ifndef __VBUSCHANNEL_H__
-#define __VBUSCHANNEL_H__
-
-/*
- * The vbus channel is the channel area provided via the BUS_CREATE controlvm
- * message for each virtual bus. This channel area is provided to both server
- * and client ends of the bus. The channel header area is initialized by
- * the server, and the remaining information is filled in by the client.
- * We currently use this for the client to provide various information about
- * the client devices and client drivers for the server end to see.
- */
-
-#include <linux/uuid.h>
-#include <linux/visorbus.h>
-
-/* {193b331b-c58f-11da-95a9-00e08161165f} */
-#define VISOR_VBUS_CHANNEL_GUID \
- GUID_INIT(0x193b331b, 0xc58f, 0x11da, \
- 0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
-
-/*
- * Must increment this whenever you insert or delete fields within this channel
- * struct. Also increment whenever you change the meaning of fields within this
- * channel struct so as to break pre-existing software. Note that you can
- * usually add fields to the END of the channel struct withOUT needing to
- * increment this.
- */
-#define VISOR_VBUS_CHANNEL_VERSIONID 1
-
-/*
- * struct visor_vbus_deviceinfo
- * @devtype: Short string identifying the device type.
- * @drvname: Driver .sys file name.
- * @infostrs: Kernel vversion.
- * @reserved: Pad size to 256 bytes.
- *
- * An array of this struct is present in the channel area for each vbus. It is
- * filled in by the client side to provide info about the device and driver from
- * the client's perspective.
- */
-struct visor_vbus_deviceinfo {
- u8 devtype[16];
- u8 drvname[16];
- u8 infostrs[96];
- u8 reserved[128];
-} __packed;
-
-/*
- * struct visor_vbus_headerinfo
- * @struct_bytes: Size of this struct in bytes.
- * @device_info_struct_bytes: Size of VISOR_VBUS_DEVICEINFO.
- * @dev_info_count: Num of items in DevInfo member. This is the
- * allocated size.
- * @chp_info_offset: Byte offset from beginning of this struct to the
- * ChpInfo struct.
- * @bus_info_offset: Byte offset from beginning of this struct to the
- * BusInfo struct.
- * @dev_info_offset: Byte offset from beginning of this struct to the
- * DevInfo array.
- * @reserved: Natural alignment.
- */
-struct visor_vbus_headerinfo {
- u32 struct_bytes;
- u32 device_info_struct_bytes;
- u32 dev_info_count;
- u32 chp_info_offset;
- u32 bus_info_offset;
- u32 dev_info_offset;
- u8 reserved[104];
-} __packed;
-
-/*
- * struct visor_vbus_channel
- * @channel_header: Initialized by server.
- * @hdr_info: Initialized by server.
- * @chp_info: Describes client chipset device and driver.
- * @bus_info: Describes client bus device and driver.
- * @dev_info: Describes client device and driver for each device on the
- * bus.
- */
-struct visor_vbus_channel {
- struct channel_header channel_header;
- struct visor_vbus_headerinfo hdr_info;
- struct visor_vbus_deviceinfo chp_info;
- struct visor_vbus_deviceinfo bus_info;
- struct visor_vbus_deviceinfo dev_info[];
-} __packed;
-
-#endif
diff --git a/drivers/visorbus/visorbus_main.c b/drivers/visorbus/visorbus_main.c
deleted file mode 100644
index 152fd29f04f295509b3317f899e0fc7675e4e527..0000000000000000000000000000000000000000
--- a/drivers/visorbus/visorbus_main.c
+++ /dev/null
@@ -1,1234 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright � 2010 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-#include <linux/ctype.h>
-#include <linux/debugfs.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/visorbus.h>
-#include <linux/uuid.h>
-
-#include "visorbus_private.h"
-
-static const guid_t visor_vbus_channel_guid = VISOR_VBUS_CHANNEL_GUID;
-
-/* Display string that is guaranteed to be no longer the 99 characters */
-#define LINESIZE 99
-#define POLLJIFFIES_NORMALCHANNEL 10
-
-/* stores whether bus_registration was successful */
-static bool initialized;
-static struct dentry *visorbus_debugfs_dir;
-
-/*
- * DEVICE type attributes
- *
- * The modalias file will contain the guid of the device.
- */
-static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct visor_device *vdev;
- const guid_t *guid;
-
- vdev = to_visor_device(dev);
- guid = visorchannel_get_guid(vdev->visorchannel);
- return sprintf(buf, "visorbus:%pUl\n", guid);
-}
-static DEVICE_ATTR_RO(modalias);
-
-static struct attribute *visorbus_dev_attrs[] = {
- &dev_attr_modalias.attr,
- NULL,
-};
-
-ATTRIBUTE_GROUPS(visorbus_dev);
-
-/* filled in with info about parent chipset driver when we register with it */
-static struct visor_vbus_deviceinfo chipset_driverinfo;
-/* filled in with info about this driver, wrt it servicing client busses */
-static struct visor_vbus_deviceinfo clientbus_driverinfo;
-
-/* list of visor_device structs, linked via .list_all */
-static LIST_HEAD(list_all_bus_instances);
-/* list of visor_device structs, linked via .list_all */
-static LIST_HEAD(list_all_device_instances);
-
-/*
- * Generic function useful for validating any type of channel when it is
- * received by the client that will be accessing the channel.
- * Note that <logCtx> is only needed for callers in the EFI environment, and
- * is used to pass the EFI_DIAG_CAPTURE_PROTOCOL needed to log messages.
- */
-int visor_check_channel(struct channel_header *ch, struct device *dev,
- const guid_t *expected_guid, char *chname,
- u64 expected_min_bytes, u32 expected_version,
- u64 expected_signature)
-{
- if (!guid_is_null(expected_guid)) {
- /* caller wants us to verify type GUID */
- if (!guid_equal(&ch->chtype, expected_guid)) {
- dev_err(dev, "Channel mismatch on channel=%s(%pUL) field=type expected=%pUL actual=%pUL\n",
- chname, expected_guid, expected_guid,
- &ch->chtype);
- return 0;
- }
- }
- /* verify channel size */
- if (expected_min_bytes > 0) {
- if (ch->size < expected_min_bytes) {
- dev_err(dev, "Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8Lx actual=0x%-8.8Lx\n",
- chname, expected_guid,
- (unsigned long long)expected_min_bytes,
- ch->size);
- return 0;
- }
- }
- /* verify channel version */
- if (expected_version > 0) {
- if (ch->version_id != expected_version) {
- dev_err(dev, "Channel mismatch on channel=%s(%pUL) field=version expected=0x%-8.8lx actual=0x%-8.8x\n",
- chname, expected_guid,
- (unsigned long)expected_version,
- ch->version_id);
- return 0;
- }
- }
- /* verify channel signature */
- if (expected_signature > 0) {
- if (ch->signature != expected_signature) {
- dev_err(dev, "Channel mismatch on channel=%s(%pUL) field=signature expected=0x%-8.8Lx actual=0x%-8.8Lx\n",
- chname, expected_guid, expected_signature,
- ch->signature);
- return 0;
- }
- }
- return 1;
-}
-
-static int visorbus_uevent(struct device *xdev, struct kobj_uevent_env *env)
-{
- struct visor_device *dev;
- const guid_t *guid;
-
- dev = to_visor_device(xdev);
- guid = visorchannel_get_guid(dev->visorchannel);
- return add_uevent_var(env, "MODALIAS=visorbus:%pUl", guid);
-}
-
-/*
- * visorbus_match() - called automatically upon adding a visor_device
- * (device_add), or adding a visor_driver
- * (visorbus_register_visor_driver)
- * @xdev: struct device for the device being matched
- * @xdrv: struct device_driver for driver to match device against
- *
- * Return: 1 iff the provided driver can control the specified device
- */
-static int visorbus_match(struct device *xdev, struct device_driver *xdrv)
-{
- const guid_t *channel_type;
- int i;
- struct visor_device *dev;
- struct visor_driver *drv;
- struct visorchannel *chan;
-
- dev = to_visor_device(xdev);
- channel_type = visorchannel_get_guid(dev->visorchannel);
- drv = to_visor_driver(xdrv);
- chan = dev->visorchannel;
- if (!drv->channel_types)
- return 0;
- for (i = 0; !guid_is_null(&drv->channel_types[i].guid); i++)
- if (guid_equal(&drv->channel_types[i].guid, channel_type) &&
- visor_check_channel(visorchannel_get_header(chan),
- xdev,
- &drv->channel_types[i].guid,
- (char *)drv->channel_types[i].name,
- drv->channel_types[i].min_bytes,
- drv->channel_types[i].version,
- VISOR_CHANNEL_SIGNATURE))
- return i + 1;
- return 0;
-}
-
-/*
- * This describes the TYPE of bus.
- * (Don't confuse this with an INSTANCE of the bus.)
- */
-static struct bus_type visorbus_type = {
- .name = "visorbus",
- .match = visorbus_match,
- .uevent = visorbus_uevent,
- .dev_groups = visorbus_dev_groups,
-};
-
-struct visor_busdev {
- u32 bus_no;
- u32 dev_no;
-};
-
-static int match_visorbus_dev_by_id(struct device *dev, const void *data)
-{
- struct visor_device *vdev = to_visor_device(dev);
- const struct visor_busdev *id = data;
-
- if (vdev->chipset_bus_no == id->bus_no &&
- vdev->chipset_dev_no == id->dev_no)
- return 1;
- return 0;
-}
-
-struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no,
- struct visor_device *from)
-{
- struct device *dev;
- struct device *dev_start = NULL;
- struct visor_busdev id = {
- .bus_no = bus_no,
- .dev_no = dev_no
- };
-
- if (from)
- dev_start = &from->device;
- dev = bus_find_device(&visorbus_type, dev_start, (void *)&id,
- match_visorbus_dev_by_id);
- if (!dev)
- return NULL;
- return to_visor_device(dev);
-}
-
-/*
- * visorbus_release_busdevice() - called when device_unregister() is called for
- * the bus device instance, after all other tasks
- * involved with destroying the dev are complete
- * @xdev: struct device for the bus being released
- */
-static void visorbus_release_busdevice(struct device *xdev)
-{
- struct visor_device *dev = dev_get_drvdata(xdev);
-
- debugfs_remove(dev->debugfs_bus_info);
- debugfs_remove_recursive(dev->debugfs_dir);
- visorchannel_destroy(dev->visorchannel);
- kfree(dev);
-}
-
-/*
- * visorbus_release_device() - called when device_unregister() is called for
- * each child device instance
- * @xdev: struct device for the visor device being released
- */
-static void visorbus_release_device(struct device *xdev)
-{
- struct visor_device *dev = to_visor_device(xdev);
-
- visorchannel_destroy(dev->visorchannel);
- kfree(dev);
-}
-
-/*
- * BUS specific channel attributes to appear under
- * /sys/bus/visorbus<x>/dev<y>/channel
- */
-
-static ssize_t physaddr_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
-
- return sprintf(buf, "0x%llx\n",
- visorchannel_get_physaddr(vdev->visorchannel));
-}
-static DEVICE_ATTR_RO(physaddr);
-
-static ssize_t nbytes_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
-
- return sprintf(buf, "0x%lx\n",
- visorchannel_get_nbytes(vdev->visorchannel));
-}
-static DEVICE_ATTR_RO(nbytes);
-
-static ssize_t clientpartition_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
-
- return sprintf(buf, "0x%llx\n",
- visorchannel_get_clientpartition(vdev->visorchannel));
-}
-static DEVICE_ATTR_RO(clientpartition);
-
-static ssize_t typeguid_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
- char typeid[LINESIZE];
-
- return sprintf(buf, "%s\n",
- visorchannel_id(vdev->visorchannel, typeid));
-}
-static DEVICE_ATTR_RO(typeguid);
-
-static ssize_t zoneguid_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
- char zoneid[LINESIZE];
-
- return sprintf(buf, "%s\n",
- visorchannel_zoneid(vdev->visorchannel, zoneid));
-}
-static DEVICE_ATTR_RO(zoneguid);
-
-static ssize_t typename_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- int i = 0;
- struct bus_type *xbus = dev->bus;
- struct device_driver *xdrv = dev->driver;
- struct visor_driver *drv = NULL;
-
- if (!xdrv)
- return 0;
- i = xbus->match(dev, xdrv);
- if (!i)
- return 0;
- drv = to_visor_driver(xdrv);
- return sprintf(buf, "%s\n", drv->channel_types[i - 1].name);
-}
-static DEVICE_ATTR_RO(typename);
-
-static struct attribute *channel_attrs[] = {
- &dev_attr_physaddr.attr,
- &dev_attr_nbytes.attr,
- &dev_attr_clientpartition.attr,
- &dev_attr_typeguid.attr,
- &dev_attr_zoneguid.attr,
- &dev_attr_typename.attr,
- NULL
-};
-
-ATTRIBUTE_GROUPS(channel);
-
-/*
- * BUS instance attributes
- *
- * define & implement display of bus attributes under
- * /sys/bus/visorbus/devices/visorbus<n>.
- */
-static ssize_t partition_handle_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
- u64 handle = visorchannel_get_clientpartition(vdev->visorchannel);
-
- return sprintf(buf, "0x%llx\n", handle);
-}
-static DEVICE_ATTR_RO(partition_handle);
-
-static ssize_t partition_guid_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
-
- return sprintf(buf, "{%pUb}\n", &vdev->partition_guid);
-}
-static DEVICE_ATTR_RO(partition_guid);
-
-static ssize_t partition_name_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
-
- return sprintf(buf, "%s\n", vdev->name);
-}
-static DEVICE_ATTR_RO(partition_name);
-
-static ssize_t channel_addr_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
- u64 addr = visorchannel_get_physaddr(vdev->visorchannel);
-
- return sprintf(buf, "0x%llx\n", addr);
-}
-static DEVICE_ATTR_RO(channel_addr);
-
-static ssize_t channel_bytes_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
- u64 nbytes = visorchannel_get_nbytes(vdev->visorchannel);
-
- return sprintf(buf, "0x%llx\n", nbytes);
-}
-static DEVICE_ATTR_RO(channel_bytes);
-
-static ssize_t channel_id_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct visor_device *vdev = to_visor_device(dev);
- int len = 0;
-
- visorchannel_id(vdev->visorchannel, buf);
- len = strlen(buf);
- buf[len++] = '\n';
- return len;
-}
-static DEVICE_ATTR_RO(channel_id);
-
-static struct attribute *visorbus_attrs[] = {
- &dev_attr_partition_handle.attr,
- &dev_attr_partition_guid.attr,
- &dev_attr_partition_name.attr,
- &dev_attr_channel_addr.attr,
- &dev_attr_channel_bytes.attr,
- &dev_attr_channel_id.attr,
- NULL
-};
-
-ATTRIBUTE_GROUPS(visorbus);
-
-/*
- * BUS debugfs entries
- *
- * define & implement display of debugfs attributes under
- * /sys/kernel/debug/visorbus/visorbus<n>.
- */
-
-/*
- * vbuschannel_print_devinfo() - format a struct visor_vbus_deviceinfo
- * and write it to a seq_file
- * @devinfo: the struct visor_vbus_deviceinfo to format
- * @seq: seq_file to write to
- * @devix: the device index to be included in the output data, or -1 if no
- * device index is to be included
- *
- * Reads @devInfo, and writes it in human-readable notation to @seq.
- */
-static void vbuschannel_print_devinfo(struct visor_vbus_deviceinfo *devinfo,
- struct seq_file *seq, int devix)
-{
- /* uninitialized vbus device entry */
- if (!isprint(devinfo->devtype[0]))
- return;
- if (devix >= 0)
- seq_printf(seq, "[%d]", devix);
- else
- /* vbus device entry is for bus or chipset */
- seq_puts(seq, " ");
- /*
- * Note: because the s-Par back-end is free to scribble in this area,
- * we never assume '\0'-termination.
- */
- seq_printf(seq, "%-*.*s ", (int)sizeof(devinfo->devtype),
- (int)sizeof(devinfo->devtype), devinfo->devtype);
- seq_printf(seq, "%-*.*s ", (int)sizeof(devinfo->drvname),
- (int)sizeof(devinfo->drvname), devinfo->drvname);
- seq_printf(seq, "%.*s\n", (int)sizeof(devinfo->infostrs),
- devinfo->infostrs);
-}
-
-static int bus_info_debugfs_show(struct seq_file *seq, void *v)
-{
- int i = 0;
- unsigned long off;
- struct visor_vbus_deviceinfo dev_info;
- struct visor_device *vdev = seq->private;
- struct visorchannel *channel = vdev->visorchannel;
-
- if (!channel)
- return 0;
-
- seq_printf(seq,
- "Client device/driver info for %s partition (vbus #%u):\n",
- ((vdev->name) ? (char *)(vdev->name) : ""),
- vdev->chipset_bus_no);
- if (visorchannel_read(channel,
- offsetof(struct visor_vbus_channel, chp_info),
- &dev_info, sizeof(dev_info)) >= 0)
- vbuschannel_print_devinfo(&dev_info, seq, -1);
- if (visorchannel_read(channel,
- offsetof(struct visor_vbus_channel, bus_info),
- &dev_info, sizeof(dev_info)) >= 0)
- vbuschannel_print_devinfo(&dev_info, seq, -1);
-
- off = offsetof(struct visor_vbus_channel, dev_info);
- while (off + sizeof(dev_info) <= visorchannel_get_nbytes(channel)) {
- if (visorchannel_read(channel, off, &dev_info,
- sizeof(dev_info)) >= 0)
- vbuschannel_print_devinfo(&dev_info, seq, i);
- off += sizeof(dev_info);
- i++;
- }
- return 0;
-}
-
-static int bus_info_debugfs_open(struct inode *inode, struct file *file)
-{
- return single_open(file, bus_info_debugfs_show, inode->i_private);
-}
-
-static const struct file_operations bus_info_debugfs_fops = {
- .owner = THIS_MODULE,
- .open = bus_info_debugfs_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static void dev_periodic_work(struct timer_list *t)
-{
- struct visor_device *dev = from_timer(dev, t, timer);
- struct visor_driver *drv = to_visor_driver(dev->device.driver);
-
- drv->channel_interrupt(dev);
- mod_timer(&dev->timer, jiffies + POLLJIFFIES_NORMALCHANNEL);
-}
-
-static int dev_start_periodic_work(struct visor_device *dev)
-{
- if (dev->being_removed || dev->timer_active)
- return -EINVAL;
-
- /* now up by at least 2 */
- get_device(&dev->device);
- dev->timer.expires = jiffies + POLLJIFFIES_NORMALCHANNEL;
- add_timer(&dev->timer);
- dev->timer_active = true;
- return 0;
-}
-
-static void dev_stop_periodic_work(struct visor_device *dev)
-{
- if (!dev->timer_active)
- return;
-
- del_timer_sync(&dev->timer);
- dev->timer_active = false;
- put_device(&dev->device);
-}
-
-/*
- * visordriver_remove_device() - handle visor device going away
- * @xdev: struct device for the visor device being removed
- *
- * This is called when device_unregister() is called for each child device
- * instance, to notify the appropriate visorbus function driver that the device
- * is going away, and to decrease the reference count of the device.
- *
- * Return: 0 iff successful
- */
-static int visordriver_remove_device(struct device *xdev)
-{
- struct visor_device *dev = to_visor_device(xdev);
- struct visor_driver *drv = to_visor_driver(xdev->driver);
-
- mutex_lock(&dev->visordriver_callback_lock);
- dev->being_removed = true;
- drv->remove(dev);
- mutex_unlock(&dev->visordriver_callback_lock);
- dev_stop_periodic_work(dev);
- put_device(&dev->device);
- return 0;
-}
-
-/*
- * visorbus_unregister_visor_driver() - unregisters the provided driver
- * @drv: the driver to unregister
- *
- * A visor function driver calls this function to unregister the driver,
- * i.e., within its module_exit function.
- */
-void visorbus_unregister_visor_driver(struct visor_driver *drv)
-{
- driver_unregister(&drv->driver);
-}
-EXPORT_SYMBOL_GPL(visorbus_unregister_visor_driver);
-
-/*
- * visorbus_read_channel() - reads from the designated channel into
- * the provided buffer
- * @dev: the device whose channel is read from
- * @offset: the offset into the channel at which reading starts
- * @dest: the destination buffer that is written into from the channel
- * @nbytes: the number of bytes to read from the channel
- *
- * If receiving a message, use the visorchannel_signalremove() function instead.
- *
- * Return: integer indicating success (zero) or failure (non-zero)
- */
-int visorbus_read_channel(struct visor_device *dev, unsigned long offset,
- void *dest, unsigned long nbytes)
-{
- return visorchannel_read(dev->visorchannel, offset, dest, nbytes);
-}
-EXPORT_SYMBOL_GPL(visorbus_read_channel);
-
-/*
- * visorbus_write_channel() - writes the provided buffer into the designated
- * channel
- * @dev: the device whose channel is written to
- * @offset: the offset into the channel at which writing starts
- * @src: the source buffer that is written into the channel
- * @nbytes: the number of bytes to write into the channel
- *
- * If sending a message, use the visorchannel_signalinsert() function instead.
- *
- * Return: integer indicating success (zero) or failure (non-zero)
- */
-int visorbus_write_channel(struct visor_device *dev, unsigned long offset,
- void *src, unsigned long nbytes)
-{
- return visorchannel_write(dev->visorchannel, offset, src, nbytes);
-}
-EXPORT_SYMBOL_GPL(visorbus_write_channel);
-
-/*
- * visorbus_enable_channel_interrupts() - enables interrupts on the
- * designated device
- * @dev: the device on which to enable interrupts
- *
- * Currently we don't yet have a real interrupt, so for now we just call the
- * interrupt function periodically via a timer.
- */
-int visorbus_enable_channel_interrupts(struct visor_device *dev)
-{
- struct visor_driver *drv = to_visor_driver(dev->device.driver);
-
- if (!drv->channel_interrupt) {
- dev_err(&dev->device, "%s no interrupt function!\n", __func__);
- return -ENOENT;
- }
-
- return dev_start_periodic_work(dev);
-}
-EXPORT_SYMBOL_GPL(visorbus_enable_channel_interrupts);
-
-/*
- * visorbus_disable_channel_interrupts() - disables interrupts on the
- * designated device
- * @dev: the device on which to disable interrupts
- */
-void visorbus_disable_channel_interrupts(struct visor_device *dev)
-{
- dev_stop_periodic_work(dev);
-}
-EXPORT_SYMBOL_GPL(visorbus_disable_channel_interrupts);
-
-/*
- * create_visor_device() - create visor device as a result of receiving the
- * controlvm device_create message for a new device
- * @dev: a freshly-zeroed struct visor_device, containing only filled-in values
- * for chipset_bus_no and chipset_dev_no, that will be initialized
- *
- * This is how everything starts from the device end.
- * This function is called when a channel first appears via a ControlVM
- * message. In response, this function allocates a visor_device to correspond
- * to the new channel, and attempts to connect it the appropriate * driver. If
- * the appropriate driver is found, the visor_driver.probe() function for that
- * driver will be called, and will be passed the new * visor_device that we
- * just created.
- *
- * It's ok if the appropriate driver is not yet loaded, because in that case
- * the new device struct will just stick around in the bus' list of devices.
- * When the appropriate driver calls visorbus_register_visor_driver(), the
- * visor_driver.probe() for the new driver will be called with the new device.
- *
- * Return: 0 if successful, otherwise the negative value returned by
- * device_add() indicating the reason for failure
- */
-int create_visor_device(struct visor_device *dev)
-{
- int err;
- u32 chipset_bus_no = dev->chipset_bus_no;
- u32 chipset_dev_no = dev->chipset_dev_no;
-
- mutex_init(&dev->visordriver_callback_lock);
- dev->device.bus = &visorbus_type;
- dev->device.groups = channel_groups;
- device_initialize(&dev->device);
- dev->device.release = visorbus_release_device;
- /* keep a reference just for us (now 2) */
- get_device(&dev->device);
- timer_setup(&dev->timer, dev_periodic_work, 0);
- /*
- * bus_id must be a unique name with respect to this bus TYPE (NOT bus
- * instance). That's why we need to include the bus number within the
- * name.
- */
- err = dev_set_name(&dev->device, "vbus%u:dev%u",
- chipset_bus_no, chipset_dev_no);
- if (err)
- goto err_put;
- /*
- * device_add does this:
- * bus_add_device(dev)
- * ->device_attach(dev)
- * ->for each driver drv registered on the bus that dev is on
- * if (dev.drv) ** device already has a driver **
- * ** not sure we could ever get here... **
- * else
- * if (bus.match(dev,drv)) [visorbus_match]
- * dev.drv = drv
- * if (!drv.probe(dev)) [visordriver_probe_device]
- * dev.drv = NULL
- *
- * Note that device_add does NOT fail if no driver failed to claim the
- * device. The device will be linked onto bus_type.klist_devices
- * regardless (use bus_for_each_dev).
- */
- err = device_add(&dev->device);
- if (err < 0)
- goto err_put;
- list_add_tail(&dev->list_all, &list_all_device_instances);
- dev->state.created = 1;
- visorbus_response(dev, err, CONTROLVM_DEVICE_CREATE);
- /* success: reference kept via unmatched get_device() */
- return 0;
-
-err_put:
- put_device(&dev->device);
- dev_err(&dev->device, "Creating visor device failed. %d\n", err);
- return err;
-}
-
-void remove_visor_device(struct visor_device *dev)
-{
- list_del(&dev->list_all);
- put_device(&dev->device);
- if (dev->pending_msg_hdr)
- visorbus_response(dev, 0, CONTROLVM_DEVICE_DESTROY);
- device_unregister(&dev->device);
-}
-
-static int get_vbus_header_info(struct visorchannel *chan,
- struct device *dev,
- struct visor_vbus_headerinfo *hdr_info)
-{
- int err;
-
- if (!visor_check_channel(visorchannel_get_header(chan),
- dev,
- &visor_vbus_channel_guid,
- "vbus",
- sizeof(struct visor_vbus_channel),
- VISOR_VBUS_CHANNEL_VERSIONID,
- VISOR_CHANNEL_SIGNATURE))
- return -EINVAL;
-
- err = visorchannel_read(chan, sizeof(struct channel_header), hdr_info,
- sizeof(*hdr_info));
- if (err < 0)
- return err;
- if (hdr_info->struct_bytes < sizeof(struct visor_vbus_headerinfo))
- return -EINVAL;
- if (hdr_info->device_info_struct_bytes <
- sizeof(struct visor_vbus_deviceinfo))
- return -EINVAL;
- return 0;
-}
-
-/*
- * write_vbus_chp_info() - write the contents of <info> to the struct
- * visor_vbus_channel.chp_info
- * @chan: indentifies the s-Par channel that will be updated
- * @hdr_info: used to find appropriate channel offset to write data
- * @info: contains the information to write
- *
- * Writes chipset info into the channel memory to be used for diagnostic
- * purposes.
- *
- * Returns no value since this is debug information and not needed for
- * device functionality.
- */
-static void write_vbus_chp_info(struct visorchannel *chan,
- struct visor_vbus_headerinfo *hdr_info,
- struct visor_vbus_deviceinfo *info)
-{
- int off;
-
- if (hdr_info->chp_info_offset == 0)
- return;
-
- off = sizeof(struct channel_header) + hdr_info->chp_info_offset;
- visorchannel_write(chan, off, info, sizeof(*info));
-}
-
-/*
- * write_vbus_bus_info() - write the contents of <info> to the struct
- * visor_vbus_channel.bus_info
- * @chan: indentifies the s-Par channel that will be updated
- * @hdr_info: used to find appropriate channel offset to write data
- * @info: contains the information to write
- *
- * Writes bus info into the channel memory to be used for diagnostic
- * purposes.
- *
- * Returns no value since this is debug information and not needed for
- * device functionality.
- */
-static void write_vbus_bus_info(struct visorchannel *chan,
- struct visor_vbus_headerinfo *hdr_info,
- struct visor_vbus_deviceinfo *info)
-{
- int off;
-
- if (hdr_info->bus_info_offset == 0)
- return;
-
- off = sizeof(struct channel_header) + hdr_info->bus_info_offset;
- visorchannel_write(chan, off, info, sizeof(*info));
-}
-
-/*
- * write_vbus_dev_info() - write the contents of <info> to the struct
- * visor_vbus_channel.dev_info[<devix>]
- * @chan: indentifies the s-Par channel that will be updated
- * @hdr_info: used to find appropriate channel offset to write data
- * @info: contains the information to write
- * @devix: the relative device number (0..n-1) of the device on the bus
- *
- * Writes device info into the channel memory to be used for diagnostic
- * purposes.
- *
- * Returns no value since this is debug information and not needed for
- * device functionality.
- */
-static void write_vbus_dev_info(struct visorchannel *chan,
- struct visor_vbus_headerinfo *hdr_info,
- struct visor_vbus_deviceinfo *info,
- unsigned int devix)
-{
- int off;
-
- if (hdr_info->dev_info_offset == 0)
- return;
- off = (sizeof(struct channel_header) + hdr_info->dev_info_offset) +
- (hdr_info->device_info_struct_bytes * devix);
- visorchannel_write(chan, off, info, sizeof(*info));
-}
-
-static void bus_device_info_init(
- struct visor_vbus_deviceinfo *bus_device_info_ptr,
- const char *dev_type, const char *drv_name)
-{
- memset(bus_device_info_ptr, 0, sizeof(struct visor_vbus_deviceinfo));
- snprintf(bus_device_info_ptr->devtype,
- sizeof(bus_device_info_ptr->devtype),
- "%s", (dev_type) ? dev_type : "unknownType");
- snprintf(bus_device_info_ptr->drvname,
- sizeof(bus_device_info_ptr->drvname),
- "%s", (drv_name) ? drv_name : "unknownDriver");
- snprintf(bus_device_info_ptr->infostrs,
- sizeof(bus_device_info_ptr->infostrs), "kernel ver. %s",
- utsname()->release);
-}
-
-/*
- * publish_vbus_dev_info() - for a child device just created on a client bus,
- * fill in information about the driver that is
- * controlling this device into the appropriate slot
- * within the vbus channel of the bus instance
- * @visordev: struct visor_device for the desired device
- */
-static void publish_vbus_dev_info(struct visor_device *visordev)
-{
- int i;
- struct visor_device *bdev;
- struct visor_driver *visordrv;
- u32 bus_no = visordev->chipset_bus_no;
- u32 dev_no = visordev->chipset_dev_no;
- struct visor_vbus_deviceinfo dev_info;
- const char *chan_type_name = NULL;
- struct visor_vbus_headerinfo *hdr_info;
-
- if (!visordev->device.driver)
- return;
- bdev = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL);
- if (!bdev)
- return;
- hdr_info = (struct visor_vbus_headerinfo *)bdev->vbus_hdr_info;
- if (!hdr_info)
- return;
- visordrv = to_visor_driver(visordev->device.driver);
-
- /*
- * Within the list of device types (by GUID) that the driver
- * says it supports, find out which one of those types matches
- * the type of this device, so that we can include the device
- * type name
- */
- for (i = 0; visordrv->channel_types[i].name; i++) {
- if (guid_equal(&visordrv->channel_types[i].guid,
- &visordev->channel_type_guid)) {
- chan_type_name = visordrv->channel_types[i].name;
- break;
- }
- }
- bus_device_info_init(&dev_info, chan_type_name, visordrv->name);
- write_vbus_dev_info(bdev->visorchannel, hdr_info, &dev_info, dev_no);
- write_vbus_chp_info(bdev->visorchannel, hdr_info, &chipset_driverinfo);
- write_vbus_bus_info(bdev->visorchannel, hdr_info,
- &clientbus_driverinfo);
-}
-
-/*
- * visordriver_probe_device() - handle new visor device coming online
- * @xdev: struct device for the visor device being probed
- *
- * This is called automatically upon adding a visor_device (device_add), or
- * adding a visor_driver (visorbus_register_visor_driver), but only after
- * visorbus_match() has returned 1 to indicate a successful match between
- * driver and device.
- *
- * If successful, a reference to the device will be held onto via get_device().
- *
- * Return: 0 if successful, meaning the function driver's probe() function
- * was successful with this device, otherwise a negative errno
- * value indicating failure reason
- */
-static int visordriver_probe_device(struct device *xdev)
-{
- int err;
- struct visor_driver *drv = to_visor_driver(xdev->driver);
- struct visor_device *dev = to_visor_device(xdev);
-
- mutex_lock(&dev->visordriver_callback_lock);
- dev->being_removed = false;
- err = drv->probe(dev);
- if (err) {
- mutex_unlock(&dev->visordriver_callback_lock);
- return err;
- }
- /* success: reference kept via unmatched get_device() */
- get_device(&dev->device);
- publish_vbus_dev_info(dev);
- mutex_unlock(&dev->visordriver_callback_lock);
- return 0;
-}
-
-/*
- * visorbus_register_visor_driver() - registers the provided visor driver for
- * handling one or more visor device
- * types (channel_types)
- * @drv: the driver to register
- *
- * A visor function driver calls this function to register the driver. The
- * caller MUST fill in the following fields within the #drv structure:
- * name, version, owner, channel_types, probe, remove
- *
- * Here's how the whole Linux bus / driver / device model works.
- *
- * At system start-up, the visorbus kernel module is loaded, which registers
- * visorbus_type as a bus type, using bus_register().
- *
- * All kernel modules that support particular device types on a
- * visorbus bus are loaded. Each of these kernel modules calls
- * visorbus_register_visor_driver() in their init functions, passing a
- * visor_driver struct. visorbus_register_visor_driver() in turn calls
- * register_driver(&visor_driver.driver). This .driver member is
- * initialized with generic methods (like probe), whose sole responsibility
- * is to act as a broker for the real methods, which are within the
- * visor_driver struct. (This is the way the subclass behavior is
- * implemented, since visor_driver is essentially a subclass of the
- * generic driver.) Whenever a driver_register() happens, core bus code in
- * the kernel does (see device_attach() in drivers/base/dd.c):
- *
- * for each dev associated with the bus (the bus that driver is on) that
- * does not yet have a driver
- * if bus.match(dev,newdriver) == yes_matched ** .match specified
- * ** during bus_register().
- * newdriver.probe(dev) ** for visor drivers, this will call
- * ** the generic driver.probe implemented in visorbus.c,
- * ** which in turn calls the probe specified within the
- * ** struct visor_driver (which was specified by the
- * ** actual device driver as part of
- * ** visorbus_register_visor_driver()).
- *
- * The above dance also happens when a new device appears.
- * So the question is, how are devices created within the system?
- * Basically, just call device_add(dev). See pci_bus_add_devices().
- * pci_scan_device() shows an example of how to build a device struct. It
- * returns the newly-created struct to pci_scan_single_device(), who adds it
- * to the list of devices at PCIBUS.devices. That list of devices is what
- * is traversed by pci_bus_add_devices().
- *
- * Return: integer indicating success (zero) or failure (non-zero)
- */
-int visorbus_register_visor_driver(struct visor_driver *drv)
-{
- /* can't register on a nonexistent bus */
- if (!initialized)
- return -ENODEV;
- if (!drv->probe)
- return -EINVAL;
- if (!drv->remove)
- return -EINVAL;
- if (!drv->pause)
- return -EINVAL;
- if (!drv->resume)
- return -EINVAL;
-
- drv->driver.name = drv->name;
- drv->driver.bus = &visorbus_type;
- drv->driver.probe = visordriver_probe_device;
- drv->driver.remove = visordriver_remove_device;
- drv->driver.owner = drv->owner;
- /*
- * driver_register does this:
- * bus_add_driver(drv)
- * ->if (drv.bus) ** (bus_type) **
- * driver_attach(drv)
- * for each dev with bus type of drv.bus
- * if (!dev.drv) ** no driver assigned yet **
- * if (bus.match(dev,drv)) [visorbus_match]
- * dev.drv = drv
- * if (!drv.probe(dev)) [visordriver_probe_device]
- * dev.drv = NULL
- */
- return driver_register(&drv->driver);
-}
-EXPORT_SYMBOL_GPL(visorbus_register_visor_driver);
-
-/*
- * visorbus_create_instance() - create a device instance for the visorbus itself
- * @dev: struct visor_device indicating the bus instance
- *
- * Return: 0 for success, otherwise negative errno value indicating reason for
- * failure
- */
-int visorbus_create_instance(struct visor_device *dev)
-{
- int id = dev->chipset_bus_no;
- int err;
- struct visor_vbus_headerinfo *hdr_info;
-
- hdr_info = kzalloc(sizeof(*hdr_info), GFP_KERNEL);
- if (!hdr_info)
- return -ENOMEM;
- dev_set_name(&dev->device, "visorbus%d", id);
- dev->device.bus = &visorbus_type;
- dev->device.groups = visorbus_groups;
- dev->device.release = visorbus_release_busdevice;
- dev->debugfs_dir = debugfs_create_dir(dev_name(&dev->device),
- visorbus_debugfs_dir);
- dev->debugfs_bus_info = debugfs_create_file("client_bus_info", 0440,
- dev->debugfs_dir, dev,
- &bus_info_debugfs_fops);
- dev_set_drvdata(&dev->device, dev);
- err = get_vbus_header_info(dev->visorchannel, &dev->device, hdr_info);
- if (err < 0)
- goto err_debugfs_dir;
- err = device_register(&dev->device);
- if (err < 0)
- goto err_debugfs_dir;
- list_add_tail(&dev->list_all, &list_all_bus_instances);
- dev->state.created = 1;
- dev->vbus_hdr_info = (void *)hdr_info;
- write_vbus_chp_info(dev->visorchannel, hdr_info, &chipset_driverinfo);
- write_vbus_bus_info(dev->visorchannel, hdr_info, &clientbus_driverinfo);
- visorbus_response(dev, err, CONTROLVM_BUS_CREATE);
- return 0;
-
-err_debugfs_dir:
- debugfs_remove_recursive(dev->debugfs_dir);
- kfree(hdr_info);
- dev_err(&dev->device, "%s failed: %d\n", __func__, err);
- return err;
-}
-
-/*
- * visorbus_remove_instance() - remove a device instance for the visorbus itself
- * @dev: struct visor_device indentifying the bus to remove
- */
-void visorbus_remove_instance(struct visor_device *dev)
-{
- /*
- * Note that this will result in the release method for
- * dev->dev being called, which will call
- * visorbus_release_busdevice(). This has something to do with
- * the put_device() done in device_unregister(), but I have never
- * successfully been able to trace thru the code to see where/how
- * release() gets called. But I know it does.
- */
- kfree(dev->vbus_hdr_info);
- list_del(&dev->list_all);
- if (dev->pending_msg_hdr)
- visorbus_response(dev, 0, CONTROLVM_BUS_DESTROY);
- device_unregister(&dev->device);
-}
-
-/*
- * remove_all_visor_devices() - remove all child visorbus device instances
- */
-static void remove_all_visor_devices(void)
-{
- struct list_head *listentry, *listtmp;
-
- list_for_each_safe(listentry, listtmp, &list_all_device_instances) {
- struct visor_device *dev;
-
- dev = list_entry(listentry, struct visor_device, list_all);
- remove_visor_device(dev);
- }
-}
-
-/*
- * pause_state_change_complete() - the callback function to be called by a
- * visorbus function driver when a
- * pending "pause device" operation has
- * completed
- * @dev: struct visor_device identifying the paused device
- * @status: 0 iff the pause state change completed successfully, otherwise
- * a negative errno value indicating the reason for failure
- */
-static void pause_state_change_complete(struct visor_device *dev, int status)
-{
- if (!dev->pausing)
- return;
-
- dev->pausing = false;
- visorbus_device_changestate_response(dev, status,
- segment_state_standby);
-}
-
-/*
- * resume_state_change_complete() - the callback function to be called by a
- * visorbus function driver when a
- * pending "resume device" operation has
- * completed
- * @dev: struct visor_device identifying the resumed device
- * @status: 0 iff the resume state change completed successfully, otherwise
- * a negative errno value indicating the reason for failure
- */
-static void resume_state_change_complete(struct visor_device *dev, int status)
-{
- if (!dev->resuming)
- return;
-
- dev->resuming = false;
- /*
- * Notify the chipset driver that the resume is complete,
- * which will presumably want to send some sort of response to
- * the initiator.
- */
- visorbus_device_changestate_response(dev, status,
- segment_state_running);
-}
-
-/*
- * visorchipset_initiate_device_pause_resume() - start a pause or resume
- * operation for a visor device
- * @dev: struct visor_device identifying the device being paused or resumed
- * @is_pause: true to indicate pause operation, false to indicate resume
- *
- * Tell the subordinate function driver for a specific device to pause
- * or resume that device. Success/failure result is returned asynchronously
- * via a callback function; see pause_state_change_complete() and
- * resume_state_change_complete().
- */
-static int visorchipset_initiate_device_pause_resume(struct visor_device *dev,
- bool is_pause)
-{
- int err;
- struct visor_driver *drv;
-
- /* If no driver associated with the device nothing to pause/resume */
- if (!dev->device.driver)
- return 0;
- if (dev->pausing || dev->resuming)
- return -EBUSY;
-
- drv = to_visor_driver(dev->device.driver);
- if (is_pause) {
- dev->pausing = true;
- err = drv->pause(dev, pause_state_change_complete);
- } else {
- /*
- * The vbus_dev_info structure in the channel was been cleared,
- * make sure it is valid.
- */
- publish_vbus_dev_info(dev);
- dev->resuming = true;
- err = drv->resume(dev, resume_state_change_complete);
- }
- return err;
-}
-
-/*
- * visorchipset_device_pause() - start a pause operation for a visor device
- * @dev_info: struct visor_device identifying the device being paused
- *
- * Tell the subordinate function driver for a specific device to pause
- * that device. Success/failure result is returned asynchronously
- * via a callback function; see pause_state_change_complete().
- */
-int visorchipset_device_pause(struct visor_device *dev_info)
-{
- int err;
-
- err = visorchipset_initiate_device_pause_resume(dev_info, true);
- if (err < 0) {
- dev_info->pausing = false;
- return err;
- }
- return 0;
-}
-
-/*
- * visorchipset_device_resume() - start a resume operation for a visor device
- * @dev_info: struct visor_device identifying the device being resumed
- *
- * Tell the subordinate function driver for a specific device to resume
- * that device. Success/failure result is returned asynchronously
- * via a callback function; see resume_state_change_complete().
- */
-int visorchipset_device_resume(struct visor_device *dev_info)
-{
- int err;
-
- err = visorchipset_initiate_device_pause_resume(dev_info, false);
- if (err < 0) {
- dev_info->resuming = false;
- return err;
- }
- return 0;
-}
-
-int visorbus_init(void)
-{
- int err;
-
- visorbus_debugfs_dir = debugfs_create_dir("visorbus", NULL);
- bus_device_info_init(&clientbus_driverinfo, "clientbus", "visorbus");
- err = bus_register(&visorbus_type);
- if (err < 0)
- return err;
- initialized = true;
- bus_device_info_init(&chipset_driverinfo, "chipset", "visorchipset");
- return 0;
-}
-
-void visorbus_exit(void)
-{
- struct list_head *listentry, *listtmp;
-
- remove_all_visor_devices();
- list_for_each_safe(listentry, listtmp, &list_all_bus_instances) {
- struct visor_device *dev;
-
- dev = list_entry(listentry, struct visor_device, list_all);
- visorbus_remove_instance(dev);
- }
- bus_unregister(&visorbus_type);
- initialized = false;
- debugfs_remove_recursive(visorbus_debugfs_dir);
-}
diff --git a/drivers/visorbus/visorbus_private.h b/drivers/visorbus/visorbus_private.h
deleted file mode 100644
index 6956de6058278a6eba69a7cf885e0e26479b1e20..0000000000000000000000000000000000000000
--- a/drivers/visorbus/visorbus_private.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2010 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-#ifndef __VISORBUS_PRIVATE_H__
-#define __VISORBUS_PRIVATE_H__
-
-#include <linux/uuid.h>
-#include <linux/utsname.h>
-#include <linux/visorbus.h>
-
-#include "controlvmchannel.h"
-#include "vbuschannel.h"
-
-struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no,
- struct visor_device *from);
-int visorbus_create_instance(struct visor_device *dev);
-void visorbus_remove_instance(struct visor_device *bus_info);
-int create_visor_device(struct visor_device *dev_info);
-void remove_visor_device(struct visor_device *dev_info);
-int visorchipset_device_pause(struct visor_device *dev_info);
-int visorchipset_device_resume(struct visor_device *dev_info);
-void visorbus_response(struct visor_device *p, int response, int controlvm_id);
-void visorbus_device_changestate_response(struct visor_device *p, int response,
- struct visor_segment_state state);
-int visorbus_init(void);
-void visorbus_exit(void);
-
-/* visorchannel access functions */
-struct visorchannel *visorchannel_create(u64 physaddr, gfp_t gfp,
- const guid_t *guid, bool needs_lock);
-void visorchannel_destroy(struct visorchannel *channel);
-int visorchannel_read(struct visorchannel *channel, ulong offset,
- void *dest, ulong nbytes);
-int visorchannel_write(struct visorchannel *channel, ulong offset,
- void *dest, ulong nbytes);
-u64 visorchannel_get_physaddr(struct visorchannel *channel);
-ulong visorchannel_get_nbytes(struct visorchannel *channel);
-char *visorchannel_id(struct visorchannel *channel, char *s);
-char *visorchannel_zoneid(struct visorchannel *channel, char *s);
-u64 visorchannel_get_clientpartition(struct visorchannel *channel);
-int visorchannel_set_clientpartition(struct visorchannel *channel,
- u64 partition_handle);
-char *visorchannel_guid_id(const guid_t *guid, char *s);
-void *visorchannel_get_header(struct visorchannel *channel);
-#endif
diff --git a/drivers/visorbus/visorchannel.c b/drivers/visorbus/visorchannel.c
deleted file mode 100644
index bd890e0f456b9de3b3ed4d016cbe00fcbf6fd5e2..0000000000000000000000000000000000000000
--- a/drivers/visorbus/visorchannel.c
+++ /dev/null
@@ -1,434 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2010 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-/*
- * This provides s-Par channel communication primitives, which are
- * independent of the mechanism used to access the channel data.
- */
-
-#include <linux/uuid.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/visorbus.h>
-
-#include "visorbus_private.h"
-#include "controlvmchannel.h"
-
-#define VISOR_DRV_NAME "visorchannel"
-
-#define VISOR_CONSOLEVIDEO_CHANNEL_GUID \
- GUID_INIT(0x3cd6e705, 0xd6a2, 0x4aa5, \
- 0xad, 0x5c, 0x7b, 0x8, 0x88, 0x9d, 0xff, 0xe2)
-
-static const guid_t visor_video_guid = VISOR_CONSOLEVIDEO_CHANNEL_GUID;
-
-struct visorchannel {
- u64 physaddr;
- ulong nbytes;
- void *mapped;
- bool requested;
- struct channel_header chan_hdr;
- guid_t guid;
- /*
- * channel creator knows if more than one thread will be inserting or
- * removing
- */
- bool needs_lock;
- /* protect head writes in chan_hdr */
- spinlock_t insert_lock;
- /* protect tail writes in chan_hdr */
- spinlock_t remove_lock;
- guid_t type;
- guid_t inst;
-};
-
-void visorchannel_destroy(struct visorchannel *channel)
-{
- if (!channel)
- return;
-
- if (channel->mapped) {
- memunmap(channel->mapped);
- if (channel->requested)
- release_mem_region(channel->physaddr, channel->nbytes);
- }
- kfree(channel);
-}
-
-u64 visorchannel_get_physaddr(struct visorchannel *channel)
-{
- return channel->physaddr;
-}
-
-ulong visorchannel_get_nbytes(struct visorchannel *channel)
-{
- return channel->nbytes;
-}
-
-char *visorchannel_guid_id(const guid_t *guid, char *s)
-{
- sprintf(s, "%pUL", guid);
- return s;
-}
-
-char *visorchannel_id(struct visorchannel *channel, char *s)
-{
- return visorchannel_guid_id(&channel->guid, s);
-}
-
-char *visorchannel_zoneid(struct visorchannel *channel, char *s)
-{
- return visorchannel_guid_id(&channel->chan_hdr.zone_guid, s);
-}
-
-u64 visorchannel_get_clientpartition(struct visorchannel *channel)
-{
- return channel->chan_hdr.partition_handle;
-}
-
-int visorchannel_set_clientpartition(struct visorchannel *channel,
- u64 partition_handle)
-{
- channel->chan_hdr.partition_handle = partition_handle;
- return 0;
-}
-
-/**
- * visorchannel_get_guid() - queries the GUID of the designated channel
- * @channel: the channel to query
- *
- * Return: the GUID of the provided channel
- */
-const guid_t *visorchannel_get_guid(struct visorchannel *channel)
-{
- return &channel->guid;
-}
-EXPORT_SYMBOL_GPL(visorchannel_get_guid);
-
-int visorchannel_read(struct visorchannel *channel, ulong offset, void *dest,
- ulong nbytes)
-{
- if (offset + nbytes > channel->nbytes)
- return -EIO;
-
- memcpy(dest, channel->mapped + offset, nbytes);
- return 0;
-}
-
-int visorchannel_write(struct visorchannel *channel, ulong offset, void *dest,
- ulong nbytes)
-{
- size_t chdr_size = sizeof(struct channel_header);
- size_t copy_size;
-
- if (offset + nbytes > channel->nbytes)
- return -EIO;
-
- if (offset < chdr_size) {
- copy_size = min(chdr_size - offset, nbytes);
- memcpy(((char *)(&channel->chan_hdr)) + offset,
- dest, copy_size);
- }
- memcpy(channel->mapped + offset, dest, nbytes);
- return 0;
-}
-
-void *visorchannel_get_header(struct visorchannel *channel)
-{
- return &channel->chan_hdr;
-}
-
-/*
- * Return offset of a specific SIGNAL_QUEUE_HEADER from the beginning of a
- * channel header
- */
-static int sig_queue_offset(struct channel_header *chan_hdr, int q)
-{
- return ((chan_hdr)->ch_space_offset +
- ((q) * sizeof(struct signal_queue_header)));
-}
-
-/*
- * Return offset of a specific queue entry (data) from the beginning of a
- * channel header
- */
-static int sig_data_offset(struct channel_header *chan_hdr, int q,
- struct signal_queue_header *sig_hdr, int slot)
-{
- return (sig_queue_offset(chan_hdr, q) + sig_hdr->sig_base_offset +
- (slot * sig_hdr->signal_size));
-}
-
-/*
- * Write the contents of a specific field within a SIGNAL_QUEUE_HEADER back into
- * host memory
- */
-#define SIG_WRITE_FIELD(channel, queue, sig_hdr, FIELD) \
- visorchannel_write(channel, \
- sig_queue_offset(&channel->chan_hdr, queue) + \
- offsetof(struct signal_queue_header, FIELD), \
- &((sig_hdr)->FIELD), \
- sizeof((sig_hdr)->FIELD))
-
-static int sig_read_header(struct visorchannel *channel, u32 queue,
- struct signal_queue_header *sig_hdr)
-{
- if (channel->chan_hdr.ch_space_offset < sizeof(struct channel_header))
- return -EINVAL;
-
- /* Read the appropriate SIGNAL_QUEUE_HEADER into local memory. */
- return visorchannel_read(channel,
- sig_queue_offset(&channel->chan_hdr, queue),
- sig_hdr, sizeof(struct signal_queue_header));
-}
-
-static int sig_read_data(struct visorchannel *channel, u32 queue,
- struct signal_queue_header *sig_hdr, u32 slot,
- void *data)
-{
- int signal_data_offset = sig_data_offset(&channel->chan_hdr, queue,
- sig_hdr, slot);
-
- return visorchannel_read(channel, signal_data_offset,
- data, sig_hdr->signal_size);
-}
-
-static int sig_write_data(struct visorchannel *channel, u32 queue,
- struct signal_queue_header *sig_hdr, u32 slot,
- void *data)
-{
- int signal_data_offset = sig_data_offset(&channel->chan_hdr, queue,
- sig_hdr, slot);
-
- return visorchannel_write(channel, signal_data_offset,
- data, sig_hdr->signal_size);
-}
-
-static int signalremove_inner(struct visorchannel *channel, u32 queue,
- void *msg)
-{
- struct signal_queue_header sig_hdr;
- int error;
-
- error = sig_read_header(channel, queue, &sig_hdr);
- if (error)
- return error;
- /* No signals to remove; have caller try again. */
- if (sig_hdr.head == sig_hdr.tail)
- return -EAGAIN;
- sig_hdr.tail = (sig_hdr.tail + 1) % sig_hdr.max_slots;
- error = sig_read_data(channel, queue, &sig_hdr, sig_hdr.tail, msg);
- if (error)
- return error;
- sig_hdr.num_received++;
- /*
- * For each data field in SIGNAL_QUEUE_HEADER that was modified, update
- * host memory. Required for channel sync.
- */
- mb();
- error = SIG_WRITE_FIELD(channel, queue, &sig_hdr, tail);
- if (error)
- return error;
- error = SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_received);
- if (error)
- return error;
- return 0;
-}
-
-/**
- * visorchannel_signalremove() - removes a message from the designated
- * channel/queue
- * @channel: the channel the message will be removed from
- * @queue: the queue the message will be removed from
- * @msg: the message to remove
- *
- * Return: integer error code indicating the status of the removal
- */
-int visorchannel_signalremove(struct visorchannel *channel, u32 queue,
- void *msg)
-{
- int rc;
- unsigned long flags;
-
- if (channel->needs_lock) {
- spin_lock_irqsave(&channel->remove_lock, flags);
- rc = signalremove_inner(channel, queue, msg);
- spin_unlock_irqrestore(&channel->remove_lock, flags);
- } else {
- rc = signalremove_inner(channel, queue, msg);
- }
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(visorchannel_signalremove);
-
-static bool queue_empty(struct visorchannel *channel, u32 queue)
-{
- struct signal_queue_header sig_hdr;
-
- if (sig_read_header(channel, queue, &sig_hdr))
- return true;
- return (sig_hdr.head == sig_hdr.tail);
-}
-
-/**
- * visorchannel_signalempty() - checks if the designated channel/queue contains
- * any messages
- * @channel: the channel to query
- * @queue: the queue in the channel to query
- *
- * Return: boolean indicating whether any messages in the designated
- * channel/queue are present
- */
-bool visorchannel_signalempty(struct visorchannel *channel, u32 queue)
-{
- bool rc;
- unsigned long flags;
-
- if (!channel->needs_lock)
- return queue_empty(channel, queue);
- spin_lock_irqsave(&channel->remove_lock, flags);
- rc = queue_empty(channel, queue);
- spin_unlock_irqrestore(&channel->remove_lock, flags);
- return rc;
-}
-EXPORT_SYMBOL_GPL(visorchannel_signalempty);
-
-static int signalinsert_inner(struct visorchannel *channel, u32 queue,
- void *msg)
-{
- struct signal_queue_header sig_hdr;
- int err;
-
- err = sig_read_header(channel, queue, &sig_hdr);
- if (err)
- return err;
- sig_hdr.head = (sig_hdr.head + 1) % sig_hdr.max_slots;
- if (sig_hdr.head == sig_hdr.tail) {
- sig_hdr.num_overflows++;
- err = SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_overflows);
- if (err)
- return err;
- return -EIO;
- }
- err = sig_write_data(channel, queue, &sig_hdr, sig_hdr.head, msg);
- if (err)
- return err;
- sig_hdr.num_sent++;
- /*
- * For each data field in SIGNAL_QUEUE_HEADER that was modified, update
- * host memory. Required for channel sync.
- */
- mb();
- err = SIG_WRITE_FIELD(channel, queue, &sig_hdr, head);
- if (err)
- return err;
- err = SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_sent);
- if (err)
- return err;
- return 0;
-}
-
-/*
- * visorchannel_create() - creates the struct visorchannel abstraction for a
- * data area in memory, but does NOT modify this data
- * area
- * @physaddr: physical address of start of channel
- * @gfp: gfp_t to use when allocating memory for the data struct
- * @guid: GUID that identifies channel type;
- * @needs_lock: must specify true if you have multiple threads of execution
- * that will be calling visorchannel methods of this
- * visorchannel at the same time
- *
- * Return: pointer to visorchannel that was created if successful,
- * otherwise NULL
- */
-struct visorchannel *visorchannel_create(u64 physaddr, gfp_t gfp,
- const guid_t *guid, bool needs_lock)
-{
- struct visorchannel *channel;
- int err;
- size_t size = sizeof(struct channel_header);
-
- if (physaddr == 0)
- return NULL;
-
- channel = kzalloc(sizeof(*channel), gfp);
- if (!channel)
- return NULL;
- channel->needs_lock = needs_lock;
- spin_lock_init(&channel->insert_lock);
- spin_lock_init(&channel->remove_lock);
- /*
- * Video driver constains the efi framebuffer so it will get a conflict
- * resource when requesting its full mem region. Since we are only
- * using the efi framebuffer for video we can ignore this. Remember that
- * we haven't requested it so we don't try to release later on.
- */
- channel->requested = request_mem_region(physaddr, size, VISOR_DRV_NAME);
- if (!channel->requested && !guid_equal(guid, &visor_video_guid))
- /* we only care about errors if this is not the video channel */
- goto err_destroy_channel;
- channel->mapped = memremap(physaddr, size, MEMREMAP_WB);
- if (!channel->mapped) {
- release_mem_region(physaddr, size);
- goto err_destroy_channel;
- }
- channel->physaddr = physaddr;
- channel->nbytes = size;
- err = visorchannel_read(channel, 0, &channel->chan_hdr, size);
- if (err)
- goto err_destroy_channel;
- size = (ulong)channel->chan_hdr.size;
- memunmap(channel->mapped);
- if (channel->requested)
- release_mem_region(channel->physaddr, channel->nbytes);
- channel->mapped = NULL;
- channel->requested = request_mem_region(channel->physaddr, size,
- VISOR_DRV_NAME);
- if (!channel->requested && !guid_equal(guid, &visor_video_guid))
- /* we only care about errors if this is not the video channel */
- goto err_destroy_channel;
- channel->mapped = memremap(channel->physaddr, size, MEMREMAP_WB);
- if (!channel->mapped) {
- release_mem_region(channel->physaddr, size);
- goto err_destroy_channel;
- }
- channel->nbytes = size;
- guid_copy(&channel->guid, guid);
- return channel;
-
-err_destroy_channel:
- visorchannel_destroy(channel);
- return NULL;
-}
-
-/**
- * visorchannel_signalinsert() - inserts a message into the designated
- * channel/queue
- * @channel: the channel the message will be added to
- * @queue: the queue the message will be added to
- * @msg: the message to insert
- *
- * Return: integer error code indicating the status of the insertion
- */
-int visorchannel_signalinsert(struct visorchannel *channel, u32 queue,
- void *msg)
-{
- int rc;
- unsigned long flags;
-
- if (channel->needs_lock) {
- spin_lock_irqsave(&channel->insert_lock, flags);
- rc = signalinsert_inner(channel, queue, msg);
- spin_unlock_irqrestore(&channel->insert_lock, flags);
- } else {
- rc = signalinsert_inner(channel, queue, msg);
- }
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(visorchannel_signalinsert);
diff --git a/drivers/visorbus/visorchipset.c b/drivers/visorbus/visorchipset.c
deleted file mode 100644
index 5668cad86e3743bb065236d28989e4c2971fb17f..0000000000000000000000000000000000000000
--- a/drivers/visorbus/visorchipset.c
+++ /dev/null
@@ -1,1691 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2010 - 2015 UNISYS CORPORATION
- * All rights reserved.
- */
-
-#include <linux/acpi.h>
-#include <linux/crash_dump.h>
-#include <linux/visorbus.h>
-
-#include "visorbus_private.h"
-
-/* {72120008-4AAB-11DC-8530-444553544200} */
-#define VISOR_SIOVM_GUID GUID_INIT(0x72120008, 0x4AAB, 0x11DC, 0x85, 0x30, \
- 0x44, 0x45, 0x53, 0x54, 0x42, 0x00)
-
-static const guid_t visor_vhba_channel_guid = VISOR_VHBA_CHANNEL_GUID;
-static const guid_t visor_siovm_guid = VISOR_SIOVM_GUID;
-static const guid_t visor_controlvm_channel_guid = VISOR_CONTROLVM_CHANNEL_GUID;
-
-#define POLLJIFFIES_CONTROLVM_FAST 1
-#define POLLJIFFIES_CONTROLVM_SLOW 100
-
-#define MAX_CONTROLVM_PAYLOAD_BYTES (1024 * 128)
-
-#define UNISYS_VISOR_LEAF_ID 0x40000000
-
-/* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */
-#define UNISYS_VISOR_ID_EBX 0x73696e55
-#define UNISYS_VISOR_ID_ECX 0x70537379
-#define UNISYS_VISOR_ID_EDX 0x34367261
-
-/*
- * When the controlvm channel is idle for at least MIN_IDLE_SECONDS, we switch
- * to slow polling mode. As soon as we get a controlvm message, we switch back
- * to fast polling mode.
- */
-#define MIN_IDLE_SECONDS 10
-
-struct parser_context {
- unsigned long allocbytes;
- unsigned long param_bytes;
- u8 *curr;
- unsigned long bytes_remaining;
- bool byte_stream;
- struct visor_controlvm_parameters_header data;
-};
-
-/* VMCALL_CONTROLVM_ADDR: Used by all guests, not just IO. */
-#define VMCALL_CONTROLVM_ADDR 0x0501
-
-enum vmcall_result {
- VMCALL_RESULT_SUCCESS = 0,
- VMCALL_RESULT_INVALID_PARAM = 1,
- VMCALL_RESULT_DATA_UNAVAILABLE = 2,
- VMCALL_RESULT_FAILURE_UNAVAILABLE = 3,
- VMCALL_RESULT_DEVICE_ERROR = 4,
- VMCALL_RESULT_DEVICE_NOT_READY = 5
-};
-
-/*
- * struct vmcall_io_controlvm_addr_params - Structure for IO VMCALLS. Has
- * parameters to VMCALL_CONTROLVM_ADDR
- * interface.
- * @address: The Guest-relative physical address of the ControlVm channel.
- * This VMCall fills this in with the appropriate address.
- * Contents provided by this VMCALL (OUT).
- * @channel_bytes: The size of the ControlVm channel in bytes This VMCall fills
- * this in with the appropriate address. Contents provided by
- * this VMCALL (OUT).
- * @unused: Unused Bytes in the 64-Bit Aligned Struct.
- */
-struct vmcall_io_controlvm_addr_params {
- u64 address;
- u32 channel_bytes;
- u8 unused[4];
-} __packed;
-
-struct visorchipset_device {
- struct acpi_device *acpi_device;
- unsigned long poll_jiffies;
- /* when we got our last controlvm message */
- unsigned long most_recent_message_jiffies;
- struct delayed_work periodic_controlvm_work;
- struct visorchannel *controlvm_channel;
- unsigned long controlvm_payload_bytes_buffered;
- /*
- * The following variables are used to handle the scenario where we are
- * unable to offload the payload from a controlvm message due to memory
- * requirements. In this scenario, we simply stash the controlvm
- * message, then attempt to process it again the next time
- * controlvm_periodic_work() runs.
- */
- struct controlvm_message controlvm_pending_msg;
- bool controlvm_pending_msg_valid;
- struct vmcall_io_controlvm_addr_params controlvm_params;
-};
-
-static struct visorchipset_device *chipset_dev;
-
-struct parahotplug_request {
- struct list_head list;
- int id;
- unsigned long expiration;
- struct controlvm_message msg;
-};
-
-/* prototypes for attributes */
-static ssize_t toolaction_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- u8 tool_action = 0;
- int err;
-
- err = visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- tool_action),
- &tool_action, sizeof(u8));
- if (err)
- return err;
- return sprintf(buf, "%u\n", tool_action);
-}
-
-static ssize_t toolaction_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- u8 tool_action;
- int err;
-
- if (kstrtou8(buf, 10, &tool_action))
- return -EINVAL;
- err = visorchannel_write(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- tool_action),
- &tool_action, sizeof(u8));
- if (err)
- return err;
- return count;
-}
-static DEVICE_ATTR_RW(toolaction);
-
-static ssize_t boottotool_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct efi_visor_indication efi_visor_indication;
- int err;
-
- err = visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- efi_visor_ind),
- &efi_visor_indication,
- sizeof(struct efi_visor_indication));
- if (err)
- return err;
- return sprintf(buf, "%u\n", efi_visor_indication.boot_to_tool);
-}
-
-static ssize_t boottotool_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- int val, err;
- struct efi_visor_indication efi_visor_indication;
-
- if (kstrtoint(buf, 10, &val))
- return -EINVAL;
- efi_visor_indication.boot_to_tool = val;
- err = visorchannel_write(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- efi_visor_ind),
- &(efi_visor_indication),
- sizeof(struct efi_visor_indication));
- if (err)
- return err;
- return count;
-}
-static DEVICE_ATTR_RW(boottotool);
-
-static ssize_t error_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- u32 error = 0;
- int err;
-
- err = visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- installation_error),
- &error, sizeof(u32));
- if (err)
- return err;
- return sprintf(buf, "%u\n", error);
-}
-
-static ssize_t error_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- u32 error;
- int err;
-
- if (kstrtou32(buf, 10, &error))
- return -EINVAL;
- err = visorchannel_write(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- installation_error),
- &error, sizeof(u32));
- if (err)
- return err;
- return count;
-}
-static DEVICE_ATTR_RW(error);
-
-static ssize_t textid_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- u32 text_id = 0;
- int err;
-
- err = visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- installation_text_id),
- &text_id, sizeof(u32));
- if (err)
- return err;
- return sprintf(buf, "%u\n", text_id);
-}
-
-static ssize_t textid_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- u32 text_id;
- int err;
-
- if (kstrtou32(buf, 10, &text_id))
- return -EINVAL;
- err = visorchannel_write(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- installation_text_id),
- &text_id, sizeof(u32));
- if (err)
- return err;
- return count;
-}
-static DEVICE_ATTR_RW(textid);
-
-static ssize_t remaining_steps_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- u16 remaining_steps = 0;
- int err;
-
- err = visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- installation_remaining_steps),
- &remaining_steps, sizeof(u16));
- if (err)
- return err;
- return sprintf(buf, "%hu\n", remaining_steps);
-}
-
-static ssize_t remaining_steps_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- u16 remaining_steps;
- int err;
-
- if (kstrtou16(buf, 10, &remaining_steps))
- return -EINVAL;
- err = visorchannel_write(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- installation_remaining_steps),
- &remaining_steps, sizeof(u16));
- if (err)
- return err;
- return count;
-}
-static DEVICE_ATTR_RW(remaining_steps);
-
-static void controlvm_init_response(struct controlvm_message *msg,
- struct controlvm_message_header *msg_hdr,
- int response)
-{
- memset(msg, 0, sizeof(struct controlvm_message));
- memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header));
- msg->hdr.payload_bytes = 0;
- msg->hdr.payload_vm_offset = 0;
- msg->hdr.payload_max_bytes = 0;
- if (response < 0) {
- msg->hdr.flags.failed = 1;
- msg->hdr.completion_status = (u32)(-response);
- }
-}
-
-static int controlvm_respond_chipset_init(
- struct controlvm_message_header *msg_hdr,
- int response,
- enum visor_chipset_feature features)
-{
- struct controlvm_message outmsg;
-
- controlvm_init_response(&outmsg, msg_hdr, response);
- outmsg.cmd.init_chipset.features = features;
- return visorchannel_signalinsert(chipset_dev->controlvm_channel,
- CONTROLVM_QUEUE_REQUEST, &outmsg);
-}
-
-static int chipset_init(struct controlvm_message *inmsg)
-{
- static int chipset_inited;
- enum visor_chipset_feature features = 0;
- int rc = CONTROLVM_RESP_SUCCESS;
- int res = 0;
-
- if (chipset_inited) {
- rc = -CONTROLVM_RESP_ALREADY_DONE;
- res = -EIO;
- goto out_respond;
- }
- chipset_inited = 1;
- /*
- * Set features to indicate we support parahotplug (if Command also
- * supports it). Set the "reply" bit so Command knows this is a
- * features-aware driver.
- */
- features = inmsg->cmd.init_chipset.features &
- VISOR_CHIPSET_FEATURE_PARA_HOTPLUG;
- features |= VISOR_CHIPSET_FEATURE_REPLY;
-
-out_respond:
- if (inmsg->hdr.flags.response_expected)
- res = controlvm_respond_chipset_init(&inmsg->hdr, rc, features);
-
- return res;
-}
-
-static int controlvm_respond(struct controlvm_message_header *msg_hdr,
- int response, struct visor_segment_state *state)
-{
- struct controlvm_message outmsg;
-
- controlvm_init_response(&outmsg, msg_hdr, response);
- if (outmsg.hdr.flags.test_message == 1)
- return -EINVAL;
- if (state) {
- outmsg.cmd.device_change_state.state = *state;
- outmsg.cmd.device_change_state.flags.phys_device = 1;
- }
- return visorchannel_signalinsert(chipset_dev->controlvm_channel,
- CONTROLVM_QUEUE_REQUEST, &outmsg);
-}
-
-enum crash_obj_type {
- CRASH_DEV,
- CRASH_BUS,
-};
-
-static int save_crash_message(struct controlvm_message *msg,
- enum crash_obj_type cr_type)
-{
- u32 local_crash_msg_offset;
- u16 local_crash_msg_count;
- int err;
-
- err = visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- saved_crash_message_count),
- &local_crash_msg_count, sizeof(u16));
- if (err) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to read message count\n");
- return err;
- }
- if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) {
- dev_err(&chipset_dev->acpi_device->dev,
- "invalid number of messages\n");
- return -EIO;
- }
- err = visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- saved_crash_message_offset),
- &local_crash_msg_offset, sizeof(u32));
- if (err) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to read offset\n");
- return err;
- }
- switch (cr_type) {
- case CRASH_DEV:
- local_crash_msg_offset += sizeof(struct controlvm_message);
- err = visorchannel_write(chipset_dev->controlvm_channel,
- local_crash_msg_offset, msg,
- sizeof(struct controlvm_message));
- if (err) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to write dev msg\n");
- return err;
- }
- break;
- case CRASH_BUS:
- err = visorchannel_write(chipset_dev->controlvm_channel,
- local_crash_msg_offset, msg,
- sizeof(struct controlvm_message));
- if (err) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to write bus msg\n");
- return err;
- }
- break;
- default:
- dev_err(&chipset_dev->acpi_device->dev,
- "Invalid crash_obj_type\n");
- break;
- }
- return 0;
-}
-
-static int controlvm_responder(enum controlvm_id cmd_id,
- struct controlvm_message_header *pending_msg_hdr,
- int response)
-{
- if (pending_msg_hdr->id != (u32)cmd_id)
- return -EINVAL;
-
- return controlvm_respond(pending_msg_hdr, response, NULL);
-}
-
-static int device_changestate_responder(enum controlvm_id cmd_id,
- struct visor_device *p, int response,
- struct visor_segment_state state)
-{
- struct controlvm_message outmsg;
-
- if (p->pending_msg_hdr->id != cmd_id)
- return -EINVAL;
-
- controlvm_init_response(&outmsg, p->pending_msg_hdr, response);
- outmsg.cmd.device_change_state.bus_no = p->chipset_bus_no;
- outmsg.cmd.device_change_state.dev_no = p->chipset_dev_no;
- outmsg.cmd.device_change_state.state = state;
- return visorchannel_signalinsert(chipset_dev->controlvm_channel,
- CONTROLVM_QUEUE_REQUEST, &outmsg);
-}
-
-static int visorbus_create(struct controlvm_message *inmsg)
-{
- struct controlvm_message_packet *cmd = &inmsg->cmd;
- struct controlvm_message_header *pmsg_hdr;
- u32 bus_no = cmd->create_bus.bus_no;
- struct visor_device *bus_info;
- struct visorchannel *visorchannel;
- int err;
-
- bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL);
- if (bus_info && bus_info->state.created == 1) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed %s: already exists\n", __func__);
- err = -EEXIST;
- goto err_respond;
- }
- bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL);
- if (!bus_info) {
- err = -ENOMEM;
- goto err_respond;
- }
- INIT_LIST_HEAD(&bus_info->list_all);
- bus_info->chipset_bus_no = bus_no;
- bus_info->chipset_dev_no = BUS_ROOT_DEVICE;
- if (guid_equal(&cmd->create_bus.bus_inst_guid, &visor_siovm_guid)) {
- err = save_crash_message(inmsg, CRASH_BUS);
- if (err)
- goto err_free_bus_info;
- }
- if (inmsg->hdr.flags.response_expected == 1) {
- pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
- if (!pmsg_hdr) {
- err = -ENOMEM;
- goto err_free_bus_info;
- }
- memcpy(pmsg_hdr, &inmsg->hdr,
- sizeof(struct controlvm_message_header));
- bus_info->pending_msg_hdr = pmsg_hdr;
- }
- visorchannel = visorchannel_create(cmd->create_bus.channel_addr,
- GFP_KERNEL,
- &cmd->create_bus.bus_data_type_guid,
- false);
- if (!visorchannel) {
- err = -ENOMEM;
- goto err_free_pending_msg;
- }
- bus_info->visorchannel = visorchannel;
- /* Response will be handled by visorbus_create_instance on success */
- err = visorbus_create_instance(bus_info);
- if (err)
- goto err_destroy_channel;
- return 0;
-
-err_destroy_channel:
- visorchannel_destroy(visorchannel);
-
-err_free_pending_msg:
- kfree(bus_info->pending_msg_hdr);
-
-err_free_bus_info:
- kfree(bus_info);
-
-err_respond:
- if (inmsg->hdr.flags.response_expected == 1)
- controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err);
- return err;
-}
-
-static int visorbus_destroy(struct controlvm_message *inmsg)
-{
- struct controlvm_message_header *pmsg_hdr;
- u32 bus_no = inmsg->cmd.destroy_bus.bus_no;
- struct visor_device *bus_info;
- int err;
-
- bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL);
- if (!bus_info) {
- err = -ENODEV;
- goto err_respond;
- }
- if (bus_info->state.created == 0) {
- err = -ENOENT;
- goto err_respond;
- }
- if (bus_info->pending_msg_hdr) {
- /* only non-NULL if dev is still waiting on a response */
- err = -EEXIST;
- goto err_respond;
- }
- if (inmsg->hdr.flags.response_expected == 1) {
- pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
- if (!pmsg_hdr) {
- err = -ENOMEM;
- goto err_respond;
- }
- memcpy(pmsg_hdr, &inmsg->hdr,
- sizeof(struct controlvm_message_header));
- bus_info->pending_msg_hdr = pmsg_hdr;
- }
- /* Response will be handled by visorbus_remove_instance */
- visorbus_remove_instance(bus_info);
- return 0;
-
-err_respond:
- if (inmsg->hdr.flags.response_expected == 1)
- controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err);
- return err;
-}
-
-static const guid_t *parser_id_get(struct parser_context *ctx)
-{
- return &ctx->data.id;
-}
-
-static void *parser_string_get(u8 *pscan, int nscan)
-{
- int value_length;
- void *value;
-
- if (nscan == 0)
- return NULL;
-
- value_length = strnlen(pscan, nscan);
- value = kzalloc(value_length + 1, GFP_KERNEL);
- if (!value)
- return NULL;
- if (value_length > 0)
- memcpy(value, pscan, value_length);
- return value;
-}
-
-static void *parser_name_get(struct parser_context *ctx)
-{
- struct visor_controlvm_parameters_header *phdr;
-
- phdr = &ctx->data;
- if ((unsigned long)phdr->name_offset +
- (unsigned long)phdr->name_length > ctx->param_bytes)
- return NULL;
- ctx->curr = (char *)&phdr + phdr->name_offset;
- ctx->bytes_remaining = phdr->name_length;
- return parser_string_get(ctx->curr, phdr->name_length);
-}
-
-static int visorbus_configure(struct controlvm_message *inmsg,
- struct parser_context *parser_ctx)
-{
- struct controlvm_message_packet *cmd = &inmsg->cmd;
- u32 bus_no;
- struct visor_device *bus_info;
- int err = 0;
-
- bus_no = cmd->configure_bus.bus_no;
- bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL);
- if (!bus_info) {
- err = -EINVAL;
- goto err_respond;
- }
- if (bus_info->state.created == 0) {
- err = -EINVAL;
- goto err_respond;
- }
- if (bus_info->pending_msg_hdr) {
- err = -EIO;
- goto err_respond;
- }
- err = visorchannel_set_clientpartition(bus_info->visorchannel,
- cmd->configure_bus.guest_handle);
- if (err)
- goto err_respond;
- if (parser_ctx) {
- const guid_t *partition_guid = parser_id_get(parser_ctx);
-
- guid_copy(&bus_info->partition_guid, partition_guid);
- bus_info->name = parser_name_get(parser_ctx);
- }
- if (inmsg->hdr.flags.response_expected == 1)
- controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err);
- return 0;
-
-err_respond:
- dev_err(&chipset_dev->acpi_device->dev,
- "%s exited with err: %d\n", __func__, err);
- if (inmsg->hdr.flags.response_expected == 1)
- controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err);
- return err;
-}
-
-static int visorbus_device_create(struct controlvm_message *inmsg)
-{
- struct controlvm_message_packet *cmd = &inmsg->cmd;
- struct controlvm_message_header *pmsg_hdr;
- u32 bus_no = cmd->create_device.bus_no;
- u32 dev_no = cmd->create_device.dev_no;
- struct visor_device *dev_info;
- struct visor_device *bus_info;
- struct visorchannel *visorchannel;
- int err;
-
- bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL);
- if (!bus_info) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to get bus by id: %d\n", bus_no);
- err = -ENODEV;
- goto err_respond;
- }
- if (bus_info->state.created == 0) {
- dev_err(&chipset_dev->acpi_device->dev,
- "bus not created, id: %d\n", bus_no);
- err = -EINVAL;
- goto err_respond;
- }
- dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL);
- if (dev_info && dev_info->state.created == 1) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to get bus by id: %d/%d\n", bus_no, dev_no);
- err = -EEXIST;
- goto err_respond;
- }
-
- dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
- if (!dev_info) {
- err = -ENOMEM;
- goto err_respond;
- }
- dev_info->chipset_bus_no = bus_no;
- dev_info->chipset_dev_no = dev_no;
- guid_copy(&dev_info->inst, &cmd->create_device.dev_inst_guid);
- dev_info->device.parent = &bus_info->device;
- visorchannel = visorchannel_create(cmd->create_device.channel_addr,
- GFP_KERNEL,
- &cmd->create_device.data_type_guid,
- true);
- if (!visorchannel) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to create visorchannel: %d/%d\n",
- bus_no, dev_no);
- err = -ENOMEM;
- goto err_free_dev_info;
- }
- dev_info->visorchannel = visorchannel;
- guid_copy(&dev_info->channel_type_guid,
- &cmd->create_device.data_type_guid);
- if (guid_equal(&cmd->create_device.data_type_guid,
- &visor_vhba_channel_guid)) {
- err = save_crash_message(inmsg, CRASH_DEV);
- if (err)
- goto err_destroy_visorchannel;
- }
- if (inmsg->hdr.flags.response_expected == 1) {
- pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
- if (!pmsg_hdr) {
- err = -ENOMEM;
- goto err_destroy_visorchannel;
- }
- memcpy(pmsg_hdr, &inmsg->hdr,
- sizeof(struct controlvm_message_header));
- dev_info->pending_msg_hdr = pmsg_hdr;
- }
- /* create_visor_device will send response */
- err = create_visor_device(dev_info);
- if (err)
- goto err_destroy_visorchannel;
-
- return 0;
-
-err_destroy_visorchannel:
- visorchannel_destroy(visorchannel);
-
-err_free_dev_info:
- kfree(dev_info);
-
-err_respond:
- if (inmsg->hdr.flags.response_expected == 1)
- controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err);
- return err;
-}
-
-static int visorbus_device_changestate(struct controlvm_message *inmsg)
-{
- struct controlvm_message_packet *cmd = &inmsg->cmd;
- struct controlvm_message_header *pmsg_hdr;
- u32 bus_no = cmd->device_change_state.bus_no;
- u32 dev_no = cmd->device_change_state.dev_no;
- struct visor_segment_state state = cmd->device_change_state.state;
- struct visor_device *dev_info;
- int err = 0;
-
- dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL);
- if (!dev_info) {
- err = -ENODEV;
- goto err_respond;
- }
- if (dev_info->state.created == 0) {
- err = -EINVAL;
- goto err_respond;
- }
- if (dev_info->pending_msg_hdr) {
- /* only non-NULL if dev is still waiting on a response */
- err = -EIO;
- goto err_respond;
- }
-
- if (inmsg->hdr.flags.response_expected == 1) {
- pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
- if (!pmsg_hdr) {
- err = -ENOMEM;
- goto err_respond;
- }
- memcpy(pmsg_hdr, &inmsg->hdr,
- sizeof(struct controlvm_message_header));
- dev_info->pending_msg_hdr = pmsg_hdr;
- }
- if (state.alive == segment_state_running.alive &&
- state.operating == segment_state_running.operating)
- /* Response will be sent from visorchipset_device_resume */
- err = visorchipset_device_resume(dev_info);
- /* ServerNotReady / ServerLost / SegmentStateStandby */
- else if (state.alive == segment_state_standby.alive &&
- state.operating == segment_state_standby.operating)
- /*
- * technically this is standby case where server is lost.
- * Response will be sent from visorchipset_device_pause.
- */
- err = visorchipset_device_pause(dev_info);
- if (err)
- goto err_respond;
- return 0;
-
-err_respond:
- dev_err(&chipset_dev->acpi_device->dev, "failed: %d\n", err);
- if (inmsg->hdr.flags.response_expected == 1)
- controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err);
- return err;
-}
-
-static int visorbus_device_destroy(struct controlvm_message *inmsg)
-{
- struct controlvm_message_packet *cmd = &inmsg->cmd;
- struct controlvm_message_header *pmsg_hdr;
- u32 bus_no = cmd->destroy_device.bus_no;
- u32 dev_no = cmd->destroy_device.dev_no;
- struct visor_device *dev_info;
- int err;
-
- dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL);
- if (!dev_info) {
- err = -ENODEV;
- goto err_respond;
- }
- if (dev_info->state.created == 0) {
- err = -EINVAL;
- goto err_respond;
- }
- if (dev_info->pending_msg_hdr) {
- /* only non-NULL if dev is still waiting on a response */
- err = -EIO;
- goto err_respond;
- }
- if (inmsg->hdr.flags.response_expected == 1) {
- pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
- if (!pmsg_hdr) {
- err = -ENOMEM;
- goto err_respond;
- }
-
- memcpy(pmsg_hdr, &inmsg->hdr,
- sizeof(struct controlvm_message_header));
- dev_info->pending_msg_hdr = pmsg_hdr;
- }
- kfree(dev_info->name);
- remove_visor_device(dev_info);
- return 0;
-
-err_respond:
- if (inmsg->hdr.flags.response_expected == 1)
- controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err);
- return err;
-}
-
-/*
- * The general parahotplug flow works as follows. The visorchipset receives
- * a DEVICE_CHANGESTATE message from Command specifying a physical device
- * to enable or disable. The CONTROLVM message handler calls
- * parahotplug_process_message, which then adds the message to a global list
- * and kicks off a udev event which causes a user level script to enable or
- * disable the specified device. The udev script then writes to
- * /sys/devices/platform/visorchipset/parahotplug, which causes the
- * parahotplug store functions to get called, at which point the
- * appropriate CONTROLVM message is retrieved from the list and responded to.
- */
-
-#define PARAHOTPLUG_TIMEOUT_MS 2000
-
-/*
- * parahotplug_next_id() - generate unique int to match an outstanding
- * CONTROLVM message with a udev script /sys
- * response
- *
- * Return: a unique integer value
- */
-static int parahotplug_next_id(void)
-{
- static atomic_t id = ATOMIC_INIT(0);
-
- return atomic_inc_return(&id);
-}
-
-/*
- * parahotplug_next_expiration() - returns the time (in jiffies) when a
- * CONTROLVM message on the list should expire
- * -- PARAHOTPLUG_TIMEOUT_MS in the future
- *
- * Return: expected expiration time (in jiffies)
- */
-static unsigned long parahotplug_next_expiration(void)
-{
- return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS);
-}
-
-/*
- * parahotplug_request_create() - create a parahotplug_request, which is
- * basically a wrapper for a CONTROLVM_MESSAGE
- * that we can stick on a list
- * @msg: the message to insert in the request
- *
- * Return: the request containing the provided message
- */
-static struct parahotplug_request *parahotplug_request_create(
- struct controlvm_message *msg)
-{
- struct parahotplug_request *req;
-
- req = kmalloc(sizeof(*req), GFP_KERNEL);
- if (!req)
- return NULL;
- req->id = parahotplug_next_id();
- req->expiration = parahotplug_next_expiration();
- req->msg = *msg;
- return req;
-}
-
-/*
- * parahotplug_request_destroy() - free a parahotplug_request
- * @req: the request to deallocate
- */
-static void parahotplug_request_destroy(struct parahotplug_request *req)
-{
- kfree(req);
-}
-
-static LIST_HEAD(parahotplug_request_list);
-/* lock for above */
-static DEFINE_SPINLOCK(parahotplug_request_list_lock);
-
-/*
- * parahotplug_request_complete() - mark request as complete
- * @id: the id of the request
- * @active: indicates whether the request is assigned to active partition
- *
- * Called from the /sys handler, which means the user script has
- * finished the enable/disable. Find the matching identifier, and
- * respond to the CONTROLVM message with success.
- *
- * Return: 0 on success or -EINVAL on failure
- */
-static int parahotplug_request_complete(int id, u16 active)
-{
- struct list_head *pos;
- struct list_head *tmp;
- struct parahotplug_request *req;
-
- spin_lock(¶hotplug_request_list_lock);
- /* Look for a request matching "id". */
- list_for_each_safe(pos, tmp, ¶hotplug_request_list) {
- req = list_entry(pos, struct parahotplug_request, list);
- if (req->id == id) {
- /*
- * Found a match. Remove it from the list and
- * respond.
- */
- list_del(pos);
- spin_unlock(¶hotplug_request_list_lock);
- req->msg.cmd.device_change_state.state.active = active;
- if (req->msg.hdr.flags.response_expected)
- controlvm_respond(
- &req->msg.hdr, CONTROLVM_RESP_SUCCESS,
- &req->msg.cmd.device_change_state.state);
- parahotplug_request_destroy(req);
- return 0;
- }
- }
- spin_unlock(¶hotplug_request_list_lock);
- return -EINVAL;
-}
-
-/*
- * devicedisabled_store() - disables the hotplug device
- * @dev: sysfs interface variable not utilized in this function
- * @attr: sysfs interface variable not utilized in this function
- * @buf: buffer containing the device id
- * @count: the size of the buffer
- *
- * The parahotplug/devicedisabled interface gets called by our support script
- * when an SR-IOV device has been shut down. The ID is passed to the script
- * and then passed back when the device has been removed.
- *
- * Return: the size of the buffer for success or negative for error
- */
-static ssize_t devicedisabled_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- unsigned int id;
- int err;
-
- if (kstrtouint(buf, 10, &id))
- return -EINVAL;
- err = parahotplug_request_complete(id, 0);
- if (err < 0)
- return err;
- return count;
-}
-static DEVICE_ATTR_WO(devicedisabled);
-
-/*
- * deviceenabled_store() - enables the hotplug device
- * @dev: sysfs interface variable not utilized in this function
- * @attr: sysfs interface variable not utilized in this function
- * @buf: buffer containing the device id
- * @count: the size of the buffer
- *
- * The parahotplug/deviceenabled interface gets called by our support script
- * when an SR-IOV device has been recovered. The ID is passed to the script
- * and then passed back when the device has been brought back up.
- *
- * Return: the size of the buffer for success or negative for error
- */
-static ssize_t deviceenabled_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- unsigned int id;
-
- if (kstrtouint(buf, 10, &id))
- return -EINVAL;
- parahotplug_request_complete(id, 1);
- return count;
-}
-static DEVICE_ATTR_WO(deviceenabled);
-
-static struct attribute *visorchipset_install_attrs[] = {
- &dev_attr_toolaction.attr,
- &dev_attr_boottotool.attr,
- &dev_attr_error.attr,
- &dev_attr_textid.attr,
- &dev_attr_remaining_steps.attr,
- NULL
-};
-
-static const struct attribute_group visorchipset_install_group = {
- .name = "install",
- .attrs = visorchipset_install_attrs
-};
-
-static struct attribute *visorchipset_parahotplug_attrs[] = {
- &dev_attr_devicedisabled.attr,
- &dev_attr_deviceenabled.attr,
- NULL
-};
-
-static const struct attribute_group visorchipset_parahotplug_group = {
- .name = "parahotplug",
- .attrs = visorchipset_parahotplug_attrs
-};
-
-static const struct attribute_group *visorchipset_dev_groups[] = {
- &visorchipset_install_group,
- &visorchipset_parahotplug_group,
- NULL
-};
-
-/*
- * parahotplug_request_kickoff() - initiate parahotplug request
- * @req: the request to initiate
- *
- * Cause uevent to run the user level script to do the disable/enable specified
- * in the parahotplug_request.
- */
-static int parahotplug_request_kickoff(struct parahotplug_request *req)
-{
- struct controlvm_message_packet *cmd = &req->msg.cmd;
- char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40],
- env_func[40];
- char *envp[] = { env_cmd, env_id, env_state, env_bus, env_dev,
- env_func, NULL
- };
-
- sprintf(env_cmd, "VISOR_PARAHOTPLUG=1");
- sprintf(env_id, "VISOR_PARAHOTPLUG_ID=%d", req->id);
- sprintf(env_state, "VISOR_PARAHOTPLUG_STATE=%d",
- cmd->device_change_state.state.active);
- sprintf(env_bus, "VISOR_PARAHOTPLUG_BUS=%d",
- cmd->device_change_state.bus_no);
- sprintf(env_dev, "VISOR_PARAHOTPLUG_DEVICE=%d",
- cmd->device_change_state.dev_no >> 3);
- sprintf(env_func, "VISOR_PARAHOTPLUG_FUNCTION=%d",
- cmd->device_change_state.dev_no & 0x7);
- return kobject_uevent_env(&chipset_dev->acpi_device->dev.kobj,
- KOBJ_CHANGE, envp);
-}
-
-/*
- * parahotplug_process_message() - enables or disables a PCI device by kicking
- * off a udev script
- * @inmsg: the message indicating whether to enable or disable
- */
-static int parahotplug_process_message(struct controlvm_message *inmsg)
-{
- struct parahotplug_request *req;
- int err;
-
- req = parahotplug_request_create(inmsg);
- if (!req)
- return -ENOMEM;
- /*
- * For enable messages, just respond with success right away, we don't
- * need to wait to see if the enable was successful.
- */
- if (inmsg->cmd.device_change_state.state.active) {
- err = parahotplug_request_kickoff(req);
- if (err)
- goto err_respond;
- controlvm_respond(&inmsg->hdr, CONTROLVM_RESP_SUCCESS,
- &inmsg->cmd.device_change_state.state);
- parahotplug_request_destroy(req);
- return 0;
- }
- /*
- * For disable messages, add the request to the request list before
- * kicking off the udev script. It won't get responded to until the
- * script has indicated it's done.
- */
- spin_lock(¶hotplug_request_list_lock);
- list_add_tail(&req->list, ¶hotplug_request_list);
- spin_unlock(¶hotplug_request_list_lock);
- err = parahotplug_request_kickoff(req);
- if (err)
- goto err_respond;
- return 0;
-
-err_respond:
- controlvm_respond(&inmsg->hdr, err,
- &inmsg->cmd.device_change_state.state);
- return err;
-}
-
-/*
- * chipset_ready_uevent() - sends chipset_ready action
- *
- * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset.
- *
- * Return: 0 on success, negative on failure
- */
-static int chipset_ready_uevent(struct controlvm_message_header *msg_hdr)
-{
- int res;
-
- res = kobject_uevent(&chipset_dev->acpi_device->dev.kobj, KOBJ_ONLINE);
- if (msg_hdr->flags.response_expected)
- controlvm_respond(msg_hdr, res, NULL);
- return res;
-}
-
-/*
- * chipset_selftest_uevent() - sends chipset_selftest action
- *
- * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset.
- *
- * Return: 0 on success, negative on failure
- */
-static int chipset_selftest_uevent(struct controlvm_message_header *msg_hdr)
-{
- char env_selftest[20];
- char *envp[] = { env_selftest, NULL };
- int res;
-
- sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1);
- res = kobject_uevent_env(&chipset_dev->acpi_device->dev.kobj,
- KOBJ_CHANGE, envp);
- if (msg_hdr->flags.response_expected)
- controlvm_respond(msg_hdr, res, NULL);
- return res;
-}
-
-/*
- * chipset_notready_uevent() - sends chipset_notready action
- *
- * Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset.
- *
- * Return: 0 on success, negative on failure
- */
-static int chipset_notready_uevent(struct controlvm_message_header *msg_hdr)
-{
- int res = kobject_uevent(&chipset_dev->acpi_device->dev.kobj,
- KOBJ_OFFLINE);
-
- if (msg_hdr->flags.response_expected)
- controlvm_respond(msg_hdr, res, NULL);
- return res;
-}
-
-static int unisys_vmcall(unsigned long tuple, unsigned long param)
-{
- int result = 0;
- unsigned int cpuid_eax, cpuid_ebx, cpuid_ecx, cpuid_edx;
- unsigned long reg_ebx;
- unsigned long reg_ecx;
-
- reg_ebx = param & 0xFFFFFFFF;
- reg_ecx = param >> 32;
- cpuid(0x00000001, &cpuid_eax, &cpuid_ebx, &cpuid_ecx, &cpuid_edx);
- if (!(cpuid_ecx & 0x80000000))
- return -EPERM;
- __asm__ __volatile__(".byte 0x00f, 0x001, 0x0c1" : "=a"(result) :
- "a"(tuple), "b"(reg_ebx), "c"(reg_ecx));
- if (result)
- goto error;
- return 0;
-
-/* Need to convert from VMCALL error codes to Linux */
-error:
- switch (result) {
- case VMCALL_RESULT_INVALID_PARAM:
- return -EINVAL;
- case VMCALL_RESULT_DATA_UNAVAILABLE:
- return -ENODEV;
- default:
- return -EFAULT;
- }
-}
-
-static int controlvm_channel_create(struct visorchipset_device *dev)
-{
- struct visorchannel *chan;
- u64 addr;
- int err;
-
- err = unisys_vmcall(VMCALL_CONTROLVM_ADDR,
- virt_to_phys(&dev->controlvm_params));
- if (err)
- return err;
- addr = dev->controlvm_params.address;
- chan = visorchannel_create(addr, GFP_KERNEL,
- &visor_controlvm_channel_guid, true);
- if (!chan)
- return -ENOMEM;
- dev->controlvm_channel = chan;
- return 0;
-}
-
-static void setup_crash_devices_work_queue(struct work_struct *work)
-{
- struct controlvm_message local_crash_bus_msg;
- struct controlvm_message local_crash_dev_msg;
- struct controlvm_message msg = {
- .hdr.id = CONTROLVM_CHIPSET_INIT,
- .cmd.init_chipset = {
- .bus_count = 23,
- .switch_count = 0,
- },
- };
- u32 local_crash_msg_offset;
- u16 local_crash_msg_count;
-
- /* send init chipset msg */
- chipset_init(&msg);
- /* get saved message count */
- if (visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- saved_crash_message_count),
- &local_crash_msg_count, sizeof(u16)) < 0) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to read channel\n");
- return;
- }
- if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) {
- dev_err(&chipset_dev->acpi_device->dev, "invalid count\n");
- return;
- }
- /* get saved crash message offset */
- if (visorchannel_read(chipset_dev->controlvm_channel,
- offsetof(struct visor_controlvm_channel,
- saved_crash_message_offset),
- &local_crash_msg_offset, sizeof(u32)) < 0) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to read channel\n");
- return;
- }
- /* read create device message for storage bus offset */
- if (visorchannel_read(chipset_dev->controlvm_channel,
- local_crash_msg_offset,
- &local_crash_bus_msg,
- sizeof(struct controlvm_message)) < 0) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to read channel\n");
- return;
- }
- /* read create device message for storage device */
- if (visorchannel_read(chipset_dev->controlvm_channel,
- local_crash_msg_offset +
- sizeof(struct controlvm_message),
- &local_crash_dev_msg,
- sizeof(struct controlvm_message)) < 0) {
- dev_err(&chipset_dev->acpi_device->dev,
- "failed to read channel\n");
- return;
- }
- /* reuse IOVM create bus message */
- if (!local_crash_bus_msg.cmd.create_bus.channel_addr) {
- dev_err(&chipset_dev->acpi_device->dev,
- "no valid create_bus message\n");
- return;
- }
- visorbus_create(&local_crash_bus_msg);
- /* reuse create device message for storage device */
- if (!local_crash_dev_msg.cmd.create_device.channel_addr) {
- dev_err(&chipset_dev->acpi_device->dev,
- "no valid create_device message\n");
- return;
- }
- visorbus_device_create(&local_crash_dev_msg);
-}
-
-void visorbus_response(struct visor_device *bus_info, int response,
- int controlvm_id)
-{
- if (!bus_info->pending_msg_hdr)
- return;
-
- controlvm_responder(controlvm_id, bus_info->pending_msg_hdr, response);
- kfree(bus_info->pending_msg_hdr);
- bus_info->pending_msg_hdr = NULL;
-}
-
-void visorbus_device_changestate_response(struct visor_device *dev_info,
- int response,
- struct visor_segment_state state)
-{
- if (!dev_info->pending_msg_hdr)
- return;
-
- device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, dev_info,
- response, state);
- kfree(dev_info->pending_msg_hdr);
- dev_info->pending_msg_hdr = NULL;
-}
-
-static void parser_done(struct parser_context *ctx)
-{
- chipset_dev->controlvm_payload_bytes_buffered -= ctx->param_bytes;
- kfree(ctx);
-}
-
-static struct parser_context *parser_init_stream(u64 addr, u32 bytes,
- bool *retry)
-{
- unsigned long allocbytes;
- struct parser_context *ctx;
- void *mapping;
-
- *retry = false;
- /* alloc an extra byte to ensure payload is \0 terminated */
- allocbytes = (unsigned long)bytes + 1 + (sizeof(struct parser_context) -
- sizeof(struct visor_controlvm_parameters_header));
- if ((chipset_dev->controlvm_payload_bytes_buffered + bytes) >
- MAX_CONTROLVM_PAYLOAD_BYTES) {
- *retry = true;
- return NULL;
- }
- ctx = kzalloc(allocbytes, GFP_KERNEL);
- if (!ctx) {
- *retry = true;
- return NULL;
- }
- ctx->allocbytes = allocbytes;
- ctx->param_bytes = bytes;
- mapping = memremap(addr, bytes, MEMREMAP_WB);
- if (!mapping)
- goto err_finish_ctx;
- memcpy(&ctx->data, mapping, bytes);
- memunmap(mapping);
- ctx->byte_stream = true;
- chipset_dev->controlvm_payload_bytes_buffered += ctx->param_bytes;
- return ctx;
-
-err_finish_ctx:
- kfree(ctx);
- return NULL;
-}
-
-/*
- * handle_command() - process a controlvm message
- * @inmsg: the message to process
- * @channel_addr: address of the controlvm channel
- *
- * Return:
- * 0 - Successfully processed the message
- * -EAGAIN - ControlVM message was not processed and should be retried
- * reading the next controlvm message; a scenario where this can
- * occur is when we need to throttle the allocation of memory in
- * which to copy out controlvm payload data.
- * < 0 - error: ControlVM message was processed but an error occurred.
- */
-static int handle_command(struct controlvm_message inmsg, u64 channel_addr)
-{
- struct controlvm_message_packet *cmd = &inmsg.cmd;
- u64 parm_addr;
- u32 parm_bytes;
- struct parser_context *parser_ctx = NULL;
- struct controlvm_message ackmsg;
- int err = 0;
-
- /* create parsing context if necessary */
- parm_addr = channel_addr + inmsg.hdr.payload_vm_offset;
- parm_bytes = inmsg.hdr.payload_bytes;
- /*
- * Parameter and channel addresses within test messages actually lie
- * within our OS-controlled memory. We need to know that, because it
- * makes a difference in how we compute the virtual address.
- */
- if (parm_bytes) {
- bool retry;
-
- parser_ctx = parser_init_stream(parm_addr, parm_bytes, &retry);
- if (!parser_ctx && retry)
- return -EAGAIN;
- }
- controlvm_init_response(&ackmsg, &inmsg.hdr, CONTROLVM_RESP_SUCCESS);
- err = visorchannel_signalinsert(chipset_dev->controlvm_channel,
- CONTROLVM_QUEUE_ACK, &ackmsg);
- if (err)
- return err;
- switch (inmsg.hdr.id) {
- case CONTROLVM_CHIPSET_INIT:
- err = chipset_init(&inmsg);
- break;
- case CONTROLVM_BUS_CREATE:
- err = visorbus_create(&inmsg);
- break;
- case CONTROLVM_BUS_DESTROY:
- err = visorbus_destroy(&inmsg);
- break;
- case CONTROLVM_BUS_CONFIGURE:
- err = visorbus_configure(&inmsg, parser_ctx);
- break;
- case CONTROLVM_DEVICE_CREATE:
- err = visorbus_device_create(&inmsg);
- break;
- case CONTROLVM_DEVICE_CHANGESTATE:
- if (cmd->device_change_state.flags.phys_device) {
- err = parahotplug_process_message(&inmsg);
- } else {
- /*
- * save the hdr and cmd structures for later use when
- * sending back the response to Command
- */
- err = visorbus_device_changestate(&inmsg);
- break;
- }
- break;
- case CONTROLVM_DEVICE_DESTROY:
- err = visorbus_device_destroy(&inmsg);
- break;
- case CONTROLVM_DEVICE_CONFIGURE:
- /* no op just send a respond that we passed */
- if (inmsg.hdr.flags.response_expected)
- controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS,
- NULL);
- break;
- case CONTROLVM_CHIPSET_READY:
- err = chipset_ready_uevent(&inmsg.hdr);
- break;
- case CONTROLVM_CHIPSET_SELFTEST:
- err = chipset_selftest_uevent(&inmsg.hdr);
- break;
- case CONTROLVM_CHIPSET_STOP:
- err = chipset_notready_uevent(&inmsg.hdr);
- break;
- default:
- err = -ENOMSG;
- if (inmsg.hdr.flags.response_expected)
- controlvm_respond(&inmsg.hdr,
- -CONTROLVM_RESP_ID_UNKNOWN, NULL);
- break;
- }
- if (parser_ctx) {
- parser_done(parser_ctx);
- parser_ctx = NULL;
- }
- return err;
-}
-
-/*
- * read_controlvm_event() - retreives the next message from the
- * CONTROLVM_QUEUE_EVENT queue in the controlvm
- * channel
- * @msg: pointer to the retrieved message
- *
- * Return: 0 if valid message was retrieved or -error
- */
-static int read_controlvm_event(struct controlvm_message *msg)
-{
- int err = visorchannel_signalremove(chipset_dev->controlvm_channel,
- CONTROLVM_QUEUE_EVENT, msg);
-
- if (err)
- return err;
- /* got a message */
- if (msg->hdr.flags.test_message == 1)
- return -EINVAL;
- return 0;
-}
-
-/*
- * parahotplug_process_list() - remove any request from the list that's been on
- * there too long and respond with an error
- */
-static void parahotplug_process_list(void)
-{
- struct list_head *pos;
- struct list_head *tmp;
-
- spin_lock(¶hotplug_request_list_lock);
- list_for_each_safe(pos, tmp, ¶hotplug_request_list) {
- struct parahotplug_request *req =
- list_entry(pos, struct parahotplug_request, list);
-
- if (!time_after_eq(jiffies, req->expiration))
- continue;
- list_del(pos);
- if (req->msg.hdr.flags.response_expected)
- controlvm_respond(
- &req->msg.hdr,
- CONTROLVM_RESP_DEVICE_UDEV_TIMEOUT,
- &req->msg.cmd.device_change_state.state);
- parahotplug_request_destroy(req);
- }
- spin_unlock(¶hotplug_request_list_lock);
-}
-
-static void controlvm_periodic_work(struct work_struct *work)
-{
- struct controlvm_message inmsg;
- int count = 0;
- int err;
-
- /* Drain the RESPONSE queue make it empty */
- do {
- err = visorchannel_signalremove(chipset_dev->controlvm_channel,
- CONTROLVM_QUEUE_RESPONSE,
- &inmsg);
- } while ((!err) && (++count < CONTROLVM_MESSAGE_MAX));
- if (err != -EAGAIN)
- goto schedule_out;
- if (chipset_dev->controlvm_pending_msg_valid) {
- /*
- * we throttled processing of a prior msg, so try to process
- * it again rather than reading a new one
- */
- inmsg = chipset_dev->controlvm_pending_msg;
- chipset_dev->controlvm_pending_msg_valid = false;
- err = 0;
- } else {
- err = read_controlvm_event(&inmsg);
- }
- while (!err) {
- chipset_dev->most_recent_message_jiffies = jiffies;
- err = handle_command(inmsg,
- visorchannel_get_physaddr
- (chipset_dev->controlvm_channel));
- if (err == -EAGAIN) {
- chipset_dev->controlvm_pending_msg = inmsg;
- chipset_dev->controlvm_pending_msg_valid = true;
- break;
- }
-
- err = read_controlvm_event(&inmsg);
- }
- /* parahotplug_worker */
- parahotplug_process_list();
-
-/*
- * The controlvm messages are sent in a bulk. If we start receiving messages, we
- * want the polling to be fast. If we do not receive any message for
- * MIN_IDLE_SECONDS, we can slow down the polling.
- */
-schedule_out:
- if (time_after(jiffies, chipset_dev->most_recent_message_jiffies +
- (HZ * MIN_IDLE_SECONDS))) {
- /*
- * it's been longer than MIN_IDLE_SECONDS since we processed
- * our last controlvm message; slow down the polling
- */
- if (chipset_dev->poll_jiffies != POLLJIFFIES_CONTROLVM_SLOW)
- chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVM_SLOW;
- } else {
- if (chipset_dev->poll_jiffies != POLLJIFFIES_CONTROLVM_FAST)
- chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVM_FAST;
- }
- schedule_delayed_work(&chipset_dev->periodic_controlvm_work,
- chipset_dev->poll_jiffies);
-}
-
-static int visorchipset_init(struct acpi_device *acpi_device)
-{
- int err = -ENOMEM;
- struct visorchannel *controlvm_channel;
-
- chipset_dev = kzalloc(sizeof(*chipset_dev), GFP_KERNEL);
- if (!chipset_dev)
- goto error;
- err = controlvm_channel_create(chipset_dev);
- if (err)
- goto error_free_chipset_dev;
- acpi_device->driver_data = chipset_dev;
- chipset_dev->acpi_device = acpi_device;
- chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVM_FAST;
- err = sysfs_create_groups(&chipset_dev->acpi_device->dev.kobj,
- visorchipset_dev_groups);
- if (err < 0)
- goto error_destroy_channel;
- controlvm_channel = chipset_dev->controlvm_channel;
- if (!visor_check_channel(visorchannel_get_header(controlvm_channel),
- &chipset_dev->acpi_device->dev,
- &visor_controlvm_channel_guid,
- "controlvm",
- sizeof(struct visor_controlvm_channel),
- VISOR_CONTROLVM_CHANNEL_VERSIONID,
- VISOR_CHANNEL_SIGNATURE)) {
- err = -ENODEV;
- goto error_delete_groups;
- }
- /* if booting in a crash kernel */
- if (is_kdump_kernel())
- INIT_DELAYED_WORK(&chipset_dev->periodic_controlvm_work,
- setup_crash_devices_work_queue);
- else
- INIT_DELAYED_WORK(&chipset_dev->periodic_controlvm_work,
- controlvm_periodic_work);
- chipset_dev->most_recent_message_jiffies = jiffies;
- chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVM_FAST;
- schedule_delayed_work(&chipset_dev->periodic_controlvm_work,
- chipset_dev->poll_jiffies);
- err = visorbus_init();
- if (err < 0)
- goto error_cancel_work;
- return 0;
-
-error_cancel_work:
- cancel_delayed_work_sync(&chipset_dev->periodic_controlvm_work);
-
-error_delete_groups:
- sysfs_remove_groups(&chipset_dev->acpi_device->dev.kobj,
- visorchipset_dev_groups);
-
-error_destroy_channel:
- visorchannel_destroy(chipset_dev->controlvm_channel);
-
-error_free_chipset_dev:
- kfree(chipset_dev);
-
-error:
- dev_err(&acpi_device->dev, "failed with error %d\n", err);
- return err;
-}
-
-static int visorchipset_exit(struct acpi_device *acpi_device)
-{
- visorbus_exit();
- cancel_delayed_work_sync(&chipset_dev->periodic_controlvm_work);
- sysfs_remove_groups(&chipset_dev->acpi_device->dev.kobj,
- visorchipset_dev_groups);
- visorchannel_destroy(chipset_dev->controlvm_channel);
- kfree(chipset_dev);
- return 0;
-}
-
-static const struct acpi_device_id unisys_device_ids[] = {
- {"PNP0A07", 0},
- {"", 0},
-};
-
-static struct acpi_driver unisys_acpi_driver = {
- .name = "unisys_acpi",
- .class = "unisys_acpi_class",
- .owner = THIS_MODULE,
- .ids = unisys_device_ids,
- .ops = {
- .add = visorchipset_init,
- .remove = visorchipset_exit,
- },
-};
-
-MODULE_DEVICE_TABLE(acpi, unisys_device_ids);
-
-static __init int visorutil_spar_detect(void)
-{
- unsigned int eax, ebx, ecx, edx;
-
- if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) {
- /* check the ID */
- cpuid(UNISYS_VISOR_LEAF_ID, &eax, &ebx, &ecx, &edx);
- return (ebx == UNISYS_VISOR_ID_EBX) &&
- (ecx == UNISYS_VISOR_ID_ECX) &&
- (edx == UNISYS_VISOR_ID_EDX);
- }
- return 0;
-}
-
-static int __init init_unisys(void)
-{
- int result;
-
- if (!visorutil_spar_detect())
- return -ENODEV;
- result = acpi_bus_register_driver(&unisys_acpi_driver);
- if (result)
- return -ENODEV;
- pr_info("Unisys Visorchipset Driver Loaded.\n");
- return 0;
-};
-
-static void __exit exit_unisys(void)
-{
- acpi_bus_unregister_driver(&unisys_acpi_driver);
-}
-
-module_init(init_unisys);
-module_exit(exit_unisys);
-
-MODULE_AUTHOR("Unisys");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("s-Par visorbus driver for virtual device buses");