This commit adds the support for two related features:

 - Support for TX interrupts, with one interrupt for each CPU

 - Support for different RX queue distribution modes
   MVPP2_QDIST_SINGLE_MODE where a single interrupt, shared by all
   CPUs, receives the RX events, and MVPP2_QDIST_MULTI_MODE, where the
   per-CPU interrupts used for TX events are also used for RX events.

Since additional interrupts are needed, an update to the Device Tree
binding is needed. However, backward compatibility is preserved with
the old Device Tree binding, by gracefully degrading to the original
behavior, with only one RX interrupt, and TX completion being handled
by an hrtimer.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation to the introduction of TX interrupts and improved RX
queue distribution, this commit introduces the concept of "queue
vector". A queue vector represents a number of RX and/or TX queues,
and an associated NAPI instance and interrupt.

This commit currently only creates a single queue_vector, so there are
no changes in behavior, but it paves the way for additional
queue_vector in the next commits.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The PPv2.2 IP has a concept of "software thread", with all registers
of the PPv2.2 mapped 8 times, for concurrent accesses by 8 "software
threads". In addition, interrupts on RX queues are associated to such
"software thread".

For most cases, we map a "software thread" to the more conventional
concept of CPU, but we will soon have one exception: we will have a
model where we have one TX interrupt per CPU (each using one software
thread), and all RX events mapped to another software thread
(associated to another interrupt).

In preparation for this change, it makes sense to change the naming
from MVPP2_MAX_CPUS to MVPP2_MAX_THREADS, and plan for 8 software
threads instead of 4 currently.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently, the global variables rxq_number and txq_number hold the
number of per-port TXQs and RXQs. Until now, such numbers were
constant regardless of the driver configuration. As we are going to
introduce different modes for TX and RX queues, these numbers will
depend on the configuration (PPv2.1 vs. PPv2.2, exact queue
distribution logic).

Therefore, as a preparation, we move the number of RXQs and TXQs in
the 'struct mvpp2_port' structure, next to the RXQs and TXQs
descriptor arrays.

For now, they remain initialized to the same default values as
rxq_number/txq_number used to be initialized, but this will change in
future commits.

The only non-mechanical change in this patch is that the check to
verify hardware constraints on the number of RXQs and TXQs is moved
from mvpp2_probe() to mvpp2_port_probe(), since it's now in
mvpp2_port_probe() that we initialize the per-port count of RXQ and
TXQ.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The RX queue group allocation is anyway re-done later in
mvpp2_port_init(), so resetting it in mvpp2_init() is not very useful,
and will be annoying as we are going to rework the RX queue group
allocation logic.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The MVPP21_ISR_RXQ_GROUP_REG register is not indexed by rxq, but by
port, so we fix the parameter name accordingly. There are no
functional changes.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This operation is required for handling ioctl commands like SIOCGMIIREG,
when debugging MDIO registers from userspace.

This commit adds support for this operation.
Signed-off-by: Romain Perier <romain.perier@collabora.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Salil Mehta says:

====================
Hisilicon Network Subsystem 3 Ethernet Driver

This patch-set contains the support of the HNS3 (Hisilicon Network Subsystem 3)
Ethernet driver for hip08 family of SoCs and future upcoming SoCs.

Hisilicon's new hip08 SoCs have integrated ethernet based on PCI Express and
hence there was a need of new driver over the previous HNS driver which is
already part of the Linux mainline. This new driver is NOT backward
compatible with HNS.

This current driver is meant to control the Physical Function and there would
soon be a support of a separate driver for Virtual Function once this base PF
driver has been accepted. Also, this driver is the ongoing development work and
HNS3 Ethernet driver would be incrementally enhanced with more new features.

High Level Architecture:

        [ Ethtool ]
	   ^  |
           |  |
     [Ethernet Client]  [ODP/UIO Client] . . . [ RoCE Client ]
                         |                            |
                   [ HNAE Device ]                    |
                         |                            |
    ---------------------------------------------     |
                         |                            |
     [ HNAE3 Framework (Register/unregister) ]        |
                         |                            |
    ---------------------------------------------     |
                         |                            |
                   [ HCLGE Layer]                     |
         ________________|_________________           |
        |                |                 |          |
    [ MDIO ]    [ Scheduler/Shaper ]  [ Debugfs* ]    |
        |                |                 |          |
        |________________|_________________|          |
                         |                            |
             [ IMP command Interface ]                |
    ---------------------------------------------     |
              HIP08  H A R D W A R E                  *

Current patch-set broadly adds the support of the following PF functionality:
 1. Basic Rx and Tx functionality
 2. TSO support
 3. Ethtool support
 4. * Debugfs support -> this patch for now has been taken off.
 5. HNAE framework and hardware compatability layer
 6. Scheduler and Shaper support in transmit function
 7. MDIO support

Change Log:
V5->V6: Addressed below comments:
        * Andrew Lunn: Comments on MDIO and ethtool link mode
        * Leon Romanvosky: Some comments on HNAE layer tidy-up
        * Internal comments on redundant code removal, fixing error types etc.
V4->V5: Addressed below concerns:
        * Florian Fanelli: Miscellaneous comments on ethtool & enet layer
        * Stephen Hemminger: comment of Netdev stats in ethool layer
        * Leon Romanvosky: Comments on Driver Version String, naming & Kconfig
        * Rochard Cochran: Redundant function prototype
V3->V4: Addressed below comments:
        * Andrew Lunn: Various comments on MDIO, ethtool, ENET driver etc,
        * Stephen Hemminger: change access and updation to 64 but statistics
        * Bo You: some spelling mistakes and checkpatch.pl errors.
V2->V3: Addressed comments
        * Yuval Mintz: Removal of redundant userprio-to-tc code
        * Stephen Hemminger: Ethtool & interuupt enable
        * Andrew Lunn: On C45/C22 PHy support, HNAE, ethtool
        * Florian Fainelli: C45/C22 and phy_connect/attach
        * Intel kbuild errors
V1->V2: Addressed some comments by kbuild, Yuval MIntz, Andrew Lunn &
        Florian Fainelli in the following patches:
        * Add support of HNS3 Ethernet Driver for hip08 SoC
        * Add MDIO support to HNS3 Ethernet driver for hip08 SoC
        * Add support of debugfs interface to HNS3 driver
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch updates the MAINTAINERS file with HNS3 Ethernet driver
maintainers names and other details. This also introduces the new
Makefiles required to build the HNS3 Ethernet driver and updates
the existing Kconfig file in the hisilicon folder.
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds the support of the Ethtool interface to
the HNS3 Ethernet driver. Various commands to read the
statistics, configure the offloading, loopback selftest etc.
are supported.
Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds the support of MDIO bus interface for HNS3 driver.
Code provides various interfaces to start and stop the PHY layer
and to read and write the MDIO bus or PHY.
Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

THis patch adds the support of the Scheduling and Shaping
functionalities during the transmit leg. This also adds the
support of Pause at MAC level. (Pause at per-priority level
shall be added later along with the DCB feature).

Hardware as such consists of two types of cofiguration of 6 level
schedulers. Algorithms varies according to the level and type
of scheduler being used. Current patch is used to initialize
the mapping, algorithms(like SP, DWRR etc) and shaper(CIR, PIR etc)
being used.
Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds the support of Hisilicon Network Subsystem Accceleration
Engine and common operations to access it. This layer provides access to the
hardware configuration, hardware statistics. This layer is also
responsible for triggering the initialization of the PHY layer through
the below MDIO layer.
Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds the support of IMP (Integrated Management Processor)
command interface to the HNS3 driver.

Each PF/VF has support of CQP(Command Queue Pair) ring interface.
Each CQP consis of send queue CSQ and receive queue CRQ.
There are various commands a PF/VF may support, like for Flow Table
manipulation, Device management, Packet buffer allocation, Forwarding,
VLANs config, Tunneling/Overlays etc.

This patch contains code to initialize the command queue, manage the
command queue descriptors and Rx/Tx protocol with the command processor
in the form of various commands/results and acknowledgements.
Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds the support of the HNAE3 (Hisilicon Network
Acceleration Engine 3) framework support to the HNS3 driver.

Framework facilitates clients like ENET(HNS3 Ethernet Driver), RoCE
and user-space Ethernet drivers (like ODP etc.) to register with HNAE3
devices and their associated operations.
Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds the support of Hisilicon Network Subsystem 3
Ethernet driver to hip08 family of SoCs.

This driver includes basic Rx/Tx functionality. It also includes
the client registration code with the HNAE3(Hisilicon Network
Acceleration Engine 3) framework.

This work provides the initial support to the hip08 SoC and
would incrementally add features or enhancements.
Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Xin Long says:

====================
sctp: remove typedefs from structures part 4

As we know, typedef is suggested not to use in kernel, even checkpatch.pl
also gives warnings about it. Now sctp is using it for many structures.

All this kind of typedef's using should be removed. This patchset is the
part 4 to remove it for another 14 basic structures from linux/sctp.h.
After this patchset, all typedefs are cleaned in linux/sctp.h.

Just as the part 1-3, No any code's logic would be changed in these patches,
only cleaning up.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_auth_chunk_t, and
replace with struct sctp_auth_chunk in the places where it's
using this typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_authhdr_t, and
replace with struct sctp_authhdr in the places where it's
using this typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_addip_chunk_t, and
replace with struct sctp_addip_chunk in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_addiphdr_t, and
replace with struct sctp_addiphdr in the places where it's
using this typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_addip_param_t, and
replace with struct sctp_addip_param in the places where it's
using this typedef.

It is to use sizeof(variable) instead of sizeof(type), and
also fix some indent problems.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove this typedef including the struct, there is even no places
using it.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_cwrhdr_t, and
replace with struct sctp_cwrhdr in the places where it's
using this typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_ecne_chunk_t, and
replace with struct sctp_ecne_chunk in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_ecnehdr_t, and
replace with struct sctp_ecnehdr in the places where it's
using this typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_error_t, and replace
with enum sctp_error in the places where it's using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_operr_chunk_t, and
replace with struct sctp_operr_chunk in the places where it's
using this typedef.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_errhdr_t, and replace
with struct sctp_errhdr in the places where it's using this
typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to fix the name of struct sctp_shutdown_chunk_t
, replace with struct sctp_initack_chunk in the places where
it's using it.

It is also to fix some indent problem.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is to remove the typedef sctp_shutdownhdr_t, and
replace with struct sctp_shutdownhdr in the places where it's
using this typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

John Allen says:

====================
ibmvnic: Improve ethtool functionality

This patch series improves ibmvnic ethtool functionality by adding support
for ethtool -l and -g options, correcting existing statistics reporting,
and augmenting the existing statistics with counters for each tx and rx
queue.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement .get_channels (ethtool -l) functionality
Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement .get_ringparam (ethtool -g) functionality
Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The vnic server reports the statistics buffer in big endian format and must
be converted to cpu endian in order to be displayed correctly on little
endian lpars.
Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add counters to report number of packets, bytes, and dropped packets for
each transmit queue and number of packets, bytes, and interrupts for each
receive queue. Modify ethtool callbacks to report the new statistics.
Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 45f119bf ("tcp: remove header prediction") introduced a
minor bug: the sk_state_change() and sk_wake_async() notifications for
a completed active connection happen twice: once in this new spot
inside tcp_finish_connect() and once in the existing code in
tcp_rcv_synsent_state_process() immediately after it calls
tcp_finish_connect(). This commit remoes the duplicate POLL_OUT
notifications.

Fixes: 45f119bf ("tcp: remove header prediction")
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

It's been a while now since ds->dst is not an array anymore, but a
simple pointer to a dsa_switch_tree.

Fortunately, SF2 does not support multi-chip and thus ds->index is
always 0.

This patch substitutes 'ds->dst[ds->index].' with 'ds->dst->'.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add const to bin_attribute structure as it is only passed to the
functions sysfs_{remove/create}_bin_file. The corresponding
arguments are of type const, so declare the structure to be const.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

RDS over IB does not use multipath RDS, so the array
of additional rds_conn_path structures is always superfluous
in this case. Reduce the memory footprint of the rds module
by making this a dynamic allocation predicated on whether
the transport is mp_capable.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Tested-by: Efrain Galaviz <efrain.galaviz@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>