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Commit 8be7dfc6 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
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Merge tag 'coresight-next-v6.1' of... 

Merge tag 'coresight-next-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux into char-misc-next

Suzuki writes:
  "coresight: Changes for v6.1

   Coresight trace subsystem updates for v6.1 includes:
     - Support for HiSilicon PTT trace
     - Coresight cleanup of sysfs accessor functions, reduced
       code size.
     - Expose coresight timestamp source for ETMv4+
     - DT binding updates to include missing properties
     - Minor documentation, Kconfig text fixes.

   Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>"

* tag 'coresight-next-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux:
  hwtracing: hisi_ptt: Fix up for "iommu/dma: Make header private"
  MAINTAINERS: Add maintainer for HiSilicon PTT driver
  docs: trace: Add HiSilicon PTT device driver documentation
  hwtracing: hisi_ptt: Add tune function support for HiSilicon PCIe Tune and Trace device
  hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device
  iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity
  coresight: cti-sysfs: Mark coresight_cti_reg_store() as __maybe_unused
  coresight: Make new csdev_access offsets unsigned
  coresight: cti-sysfs: Re-use same functions for similar sysfs register accessors
  coresight: Re-use same function for similar sysfs register accessors
  coresight: Simplify sysfs accessors by using csdev_access abstraction
  coresight: Remove unused function parameter
  coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface
  coresight: etm4x: Expose default timestamp source in sysfs
  dt-bindings: arm: coresight-tmc: Add 'iommu' property
  dt-bindings: arm: coresight: Add 'power-domains' property
  coresight: docs: Fix a broken reference
  coresight: trbe: fix Kconfig "its" grammar
parents 4ba028e4 5fc1531d
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Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x
View file @ 8be7dfc6
......@@ -516,3 +516,11 @@ Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (Read) Returns the number of special conditional P1 right-hand keys
that the trace unit can use (0x194). The value is taken
directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/ts_source
Date: October 2022
KernelVersion: 6.1
Contact: Mathieu Poirier <mathieu.poirier@linaro.org> or Suzuki K Poulose <suzuki.poulose@arm.com>
Description: (Read) When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for
trace session. Otherwise -1 indicates an unknown time source. Check
trcidr0.tssize to see if a global timestamp is available.
Documentation/ABI/testing/sysfs-devices-hisi_ptt 0 → 100644
View file @ 8be7dfc6
What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune
Date: October 2022
KernelVersion: 6.1
Contact: Yicong Yang <yangyicong@hisilicon.com>
Description: This directory contains files for tuning the PCIe link
parameters(events). Each file is named after the event
of the PCIe link.
See Documentation/trace/hisi-ptt.rst for more information.
What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_cpl
Date: October 2022
KernelVersion: 6.1
Contact: Yicong Yang <yangyicong@hisilicon.com>
Description: (RW) Controls the weight of Tx completion TLPs, which influence
the proportion of outbound completion TLPs on the PCIe link.
The available tune data is [0, 1, 2]. Writing a negative value
will return an error, and out of range values will be converted
to 2. The value indicates a probable level of the event.
What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_np
Date: October 2022
KernelVersion: 6.1
Contact: Yicong Yang <yangyicong@hisilicon.com>
Description: (RW) Controls the weight of Tx non-posted TLPs, which influence
the proportion of outbound non-posted TLPs on the PCIe link.
The available tune data is [0, 1, 2]. Writing a negative value
will return an error, and out of range values will be converted
to 2. The value indicates a probable level of the event.
What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_p
Date: October 2022
KernelVersion: 6.1
Contact: Yicong Yang <yangyicong@hisilicon.com>
Description: (RW) Controls the weight of Tx posted TLPs, which influence the
proportion of outbound posted TLPs on the PCIe link.
The available tune data is [0, 1, 2]. Writing a negative value
will return an error, and out of range values will be converted
to 2. The value indicates a probable level of the event.
What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/rx_alloc_buf_level
Date: October 2022
KernelVersion: 6.1
Contact: Yicong Yang <yangyicong@hisilicon.com>
Description: (RW) Control the allocated buffer watermark for inbound packets.
The packets will be stored in the buffer first and then transmitted
either when the watermark reached or when timed out.
The available tune data is [0, 1, 2]. Writing a negative value
will return an error, and out of range values will be converted
to 2. The value indicates a probable level of the event.
What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/tx_alloc_buf_level
Date: October 2022
KernelVersion: 6.1
Contact: Yicong Yang <yangyicong@hisilicon.com>
Description: (RW) Control the allocated buffer watermark of outbound packets.
The packets will be stored in the buffer first and then transmitted
either when the watermark reached or when timed out.
The available tune data is [0, 1, 2]. Writing a negative value
will return an error, and out of range values will be converted
to 2. The value indicates a probable level of the event.
Documentation/devicetree/bindings/arm/arm,coresight-catu.yaml
View file @ 8be7dfc6
......@@ -61,6 +61,9 @@ properties:
maxItems: 1
description: Address translation error interrupt
power-domains:
maxItems: 1
in-ports:
$ref: /schemas/graph.yaml#/properties/ports
additionalProperties: false
......
Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml
View file @ 8be7dfc6
......@@ -98,6 +98,9 @@ properties:
base cti node if compatible string arm,coresight-cti-v8-arch is used,
or may appear in a trig-conns child node when appropriate.
power-domains:
maxItems: 1
arm,cti-ctm-id:
$ref: /schemas/types.yaml#/definitions/uint32
description:
......
Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
View file @ 8be7dfc6
......@@ -54,6 +54,9 @@ properties:
- const: apb_pclk
- const: atclk
power-domains:
maxItems: 1
in-ports:
$ref: /schemas/graph.yaml#/properties/ports
......
Documentation/devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml
View file @ 8be7dfc6
......@@ -54,6 +54,9 @@ properties:
- const: apb_pclk
- const: atclk
power-domains:
maxItems: 1
qcom,replicator-loses-context:
type: boolean
description:
......
Documentation/devicetree/bindings/arm/arm,coresight-etb10.yaml
View file @ 8be7dfc6
......@@ -54,6 +54,9 @@ properties:
- const: apb_pclk
- const: atclk
power-domains:
maxItems: 1
in-ports:
$ref: /schemas/graph.yaml#/properties/ports
additionalProperties: false
......
Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml
View file @ 8be7dfc6
......@@ -73,6 +73,9 @@ properties:
- const: apb_pclk
- const: atclk
power-domains:
maxItems: 1
arm,coresight-loses-context-with-cpu:
type: boolean
description:
......
Documentation/devicetree/bindings/arm/arm,coresight-static-funnel.yaml
View file @ 8be7dfc6
......@@ -27,6 +27,9 @@ properties:
compatible:
const: arm,coresight-static-funnel
power-domains:
maxItems: 1
in-ports:
$ref: /schemas/graph.yaml#/properties/ports
......
Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml
View file @ 8be7dfc6
......@@ -27,6 +27,9 @@ properties:
compatible:
const: arm,coresight-static-replicator
power-domains:
maxItems: 1
in-ports:
$ref: /schemas/graph.yaml#/properties/ports
additionalProperties: false
......
Documentation/devicetree/bindings/arm/arm,coresight-stm.yaml
View file @ 8be7dfc6
......@@ -61,6 +61,9 @@ properties:
- const: apb_pclk
- const: atclk
power-domains:
maxItems: 1
out-ports:
$ref: /schemas/graph.yaml#/properties/ports
additionalProperties: false
......
Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
View file @ 8be7dfc6
......@@ -55,6 +55,12 @@ properties:
- const: apb_pclk
- const: atclk
iommus:
maxItems: 1
power-domains:
maxItems: 1
arm,buffer-size:
$ref: /schemas/types.yaml#/definitions/uint32
deprecated: true
......
Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml
View file @ 8be7dfc6
......@@ -54,6 +54,9 @@ properties:
- const: apb_pclk
- const: atclk
power-domains:
maxItems: 1
in-ports:
$ref: /schemas/graph.yaml#/properties/ports
additionalProperties: false
......
Documentation/devicetree/bindings/arm/arm,embedded-trace-extension.yaml
View file @ 8be7dfc6
......@@ -33,6 +33,9 @@ properties:
Handle to the cpu this ETE is bound to.
$ref: /schemas/types.yaml#/definitions/phandle
power-domains:
maxItems: 1
out-ports:
description: |
Output connections from the ETE to legacy CoreSight trace bus.
......
Documentation/trace/coresight/coresight-cpu-debug.rst
View file @ 8be7dfc6
......@@ -117,7 +117,8 @@ divide into below cases:
Device Tree Bindings
--------------------
See Documentation/devicetree/bindings/arm/coresight-cpu-debug.txt for details.
See Documentation/devicetree/bindings/arm/arm,coresight-cpu-debug.yaml for
details.
How to use the module
......
Documentation/trace/coresight/coresight-etm4x-reference.rst
View file @ 8be7dfc6
......@@ -71,6 +71,20 @@ the ‘TRC’ prefix.
----
:File: ``ts_source`` (ro)
:Trace Registers: None.
:Notes:
When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for trace session. Otherwise -1
indicates an unknown time source. Check trcidr0.tssize to see if a global timestamp is
available.
:Example:
``$> cat ts_source``
``$> 1``
----
:File: ``addr_idx`` (rw)
:Trace Registers: None.
:Notes:
......
Documentation/trace/hisi-ptt.rst 0 → 100644
View file @ 8be7dfc6
.. SPDX-License-Identifier: GPL-2.0
======================================
HiSilicon PCIe Tune and Trace device
======================================
Introduction
============
HiSilicon PCIe tune and trace device (PTT) is a PCIe Root Complex
integrated Endpoint (RCiEP) device, providing the capability
to dynamically monitor and tune the PCIe link's events (tune),
and trace the TLP headers (trace). The two functions are independent,
but is recommended to use them together to analyze and enhance the
PCIe link's performance.
On Kunpeng 930 SoC, the PCIe Root Complex is composed of several
PCIe cores. Each PCIe core includes several Root Ports and a PTT
RCiEP, like below. The PTT device is capable of tuning and
tracing the links of the PCIe core.
::
+--------------Core 0-------+
| | [ PTT ] |
| | [Root Port]---[Endpoint]
| | [Root Port]---[Endpoint]
| | [Root Port]---[Endpoint]
Root Complex |------Core 1-------+
| | [ PTT ] |
| | [Root Port]---[ Switch ]---[Endpoint]
| | [Root Port]---[Endpoint] `-[Endpoint]
| | [Root Port]---[Endpoint]
+---------------------------+
The PTT device driver registers one PMU device for each PTT device.
The name of each PTT device is composed of 'hisi_ptt' prefix with
the id of the SICL and the Core where it locates. The Kunpeng 930
SoC encapsulates multiple CPU dies (SCCL, Super CPU Cluster) and
IO dies (SICL, Super I/O Cluster), where there's one PCIe Root
Complex for each SICL.
::
/sys/devices/hisi_ptt<sicl_id>_<core_id>
Tune
====
PTT tune is designed for monitoring and adjusting PCIe link parameters (events).
Currently we support events in 2 classes. The scope of the events
covers the PCIe core to which the PTT device belongs.
Each event is presented as a file under $(PTT PMU dir)/tune, and
a simple open/read/write/close cycle will be used to tune the event.
::
$ cd /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune
$ ls
qos_tx_cpl qos_tx_np qos_tx_p
tx_path_rx_req_alloc_buf_level
tx_path_tx_req_alloc_buf_level
$ cat qos_tx_dp
1
$ echo 2 > qos_tx_dp
$ cat qos_tx_dp
2
Current value (numerical value) of the event can be simply read
from the file, and the desired value written to the file to tune.
1. Tx Path QoS Control
------------------------
The following files are provided to tune the QoS of the tx path of
the PCIe core.
- qos_tx_cpl: weight of Tx completion TLPs
- qos_tx_np: weight of Tx non-posted TLPs
- qos_tx_p: weight of Tx posted TLPs
The weight influences the proportion of certain packets on the PCIe link.
For example, for the storage scenario, increase the proportion
of the completion packets on the link to enhance the performance as
more completions are consumed.
The available tune data of these events is [0, 1, 2].
Writing a negative value will return an error, and out of range
values will be converted to 2. Note that the event value just
indicates a probable level, but is not precise.
2. Tx Path Buffer Control
-------------------------
Following files are provided to tune the buffer of tx path of the PCIe core.
- rx_alloc_buf_level: watermark of Rx requested
- tx_alloc_buf_level: watermark of Tx requested
These events influence the watermark of the buffer allocated for each
type. Rx means the inbound while Tx means outbound. The packets will
be stored in the buffer first and then transmitted either when the
watermark reached or when timed out. For a busy direction, you should
increase the related buffer watermark to avoid frequently posting and
thus enhance the performance. In most cases just keep the default value.
The available tune data of above events is [0, 1, 2].
Writing a negative value will return an error, and out of range
values will be converted to 2. Note that the event value just
indicates a probable level, but is not precise.
Trace
=====
PTT trace is designed for dumping the TLP headers to the memory, which
can be used to analyze the transactions and usage condition of the PCIe
Link. You can choose to filter the traced headers by either Requester ID,
or those downstream of a set of Root Ports on the same core of the PTT
device. It's also supported to trace the headers of certain type and of
certain direction.
You can use the perf command `perf record` to set the parameters, start
trace and get the data. It's also supported to decode the trace
data with `perf report`. The control parameters for trace is inputted
as event code for each events, which will be further illustrated later.
An example usage is like
::
$ perf record -e hisi_ptt0_2/filter=0x80001,type=1,direction=1,
format=1/ -- sleep 5
This will trace the TLP headers downstream root port 0000:00:10.1 (event
code for event 'filter' is 0x80001) with type of posted TLP requests,
direction of inbound and traced data format of 8DW.
1. Filter
---------
The TLP headers to trace can be filtered by the Root Ports or the Requester ID
of the Endpoint, which are located on the same core of the PTT device. You can
set the filter by specifying the `filter` parameter which is required to start
the trace. The parameter value is 20 bit. Bit 19 indicates the filter type.
1 for Root Port filter and 0 for Requester filter. Bit[15:0] indicates the
filter value. The value for a Root Port is a mask of the core port id which is
calculated from its PCI Slot ID as (slotid & 7) * 2. The value for a Requester
is the Requester ID (Device ID of the PCIe function). Bit[18:16] is currently
reserved for extension.
For example, if the desired filter is Endpoint function 0000:01:00.1 the filter
value will be 0x00101. If the desired filter is Root Port 0000:00:10.0 then
then filter value is calculated as 0x80001.
Note that multiple Root Ports can be specified at one time, but only one
Endpoint function can be specified in one trace. Specifying both Root Port
and function at the same time is not supported. Driver maintains a list of
available filters and will check the invalid inputs.
Currently the available filters are detected in driver's probe. If the supported
devices are removed/added after probe, you may need to reload the driver to update
the filters.
2. Type
-------
You can trace the TLP headers of certain types by specifying the `type`
parameter, which is required to start the trace. The parameter value is
8 bit. Current supported types and related values are shown below:
- 8'b00000001: posted requests (P)
- 8'b00000010: non-posted requests (NP)
- 8'b00000100: completions (CPL)
You can specify multiple types when tracing inbound TLP headers, but can only
specify one when tracing outbound TLP headers.
3. Direction
------------
You can trace the TLP headers from certain direction, which is relative
to the Root Port or the PCIe core, by specifying the `direction` parameter.
This is optional and the default parameter is inbound. The parameter value
is 4 bit. When the desired format is 4DW, directions and related values
supported are shown below:
- 4'b0000: inbound TLPs (P, NP, CPL)
- 4'b0001: outbound TLPs (P, NP, CPL)
- 4'b0010: outbound TLPs (P, NP, CPL) and inbound TLPs (P, NP, CPL B)
- 4'b0011: outbound TLPs (P, NP, CPL) and inbound TLPs (CPL A)
When the desired format is 8DW, directions and related values supported are
shown below:
- 4'b0000: reserved
- 4'b0001: outbound TLPs (P, NP, CPL)
- 4'b0010: inbound TLPs (P, NP, CPL B)
- 4'b0011: inbound TLPs (CPL A)
Inbound completions are classified into two types:
- completion A (CPL A): completion of CHI/DMA/Native non-posted requests, except for CPL B
- completion B (CPL B): completion of DMA remote2local and P2P non-posted requests
4. Format
--------------
You can change the format of the traced TLP headers by specifying the
`format` parameter. The default format is 4DW. The parameter value is 4 bit.
Current supported formats and related values are shown below:
- 4'b0000: 4DW length per TLP header
- 4'b0001: 8DW length per TLP header
The traced TLP header format is different from the PCIe standard.
When using the 8DW data format, the entire TLP header is logged
(Header DW0-3 shown below). For example, the TLP header for Memory
Reads with 64-bit addresses is shown in PCIe r5.0, Figure 2-17;
the header for Configuration Requests is shown in Figure 2.20, etc.
In addition, 8DW trace buffer entries contain a timestamp and
possibly a prefix for a PASID TLP prefix (see Figure 6-20, PCIe r5.0).
Otherwise this field will be all 0.
The bit[31:11] of DW0 is always 0x1fffff, which can be
used to distinguish the data format. 8DW format is like
::
bits [ 31:11 ][ 10:0 ]
|---------------------------------------|-------------------|
DW0 [ 0x1fffff ][ Reserved (0x7ff) ]
DW1 [ Prefix ]
DW2 [ Header DW0 ]
DW3 [ Header DW1 ]
DW4 [ Header DW2 ]
DW5 [ Header DW3 ]
DW6 [ Reserved (0x0) ]
DW7 [ Time ]
When using the 4DW data format, DW0 of the trace buffer entry
contains selected fields of DW0 of the TLP, together with a
timestamp. DW1-DW3 of the trace buffer entry contain DW1-DW3
directly from the TLP header.
4DW format is like
::
bits [31:30] [ 29:25 ][24][23][22][21][ 20:11 ][ 10:0 ]
|-----|---------|---|---|---|---|-------------|-------------|
DW0 [ Fmt ][ Type ][T9][T8][TH][SO][ Length ][ Time ]
DW1 [ Header DW1 ]
DW2 [ Header DW2 ]
DW3 [ Header DW3 ]
5. Memory Management
--------------------
The traced TLP headers will be written to the memory allocated
by the driver. The hardware accepts 4 DMA address with same size,
and writes the buffer sequentially like below. If DMA addr 3 is
finished and the trace is still on, it will return to addr 0.
::
+->[DMA addr 0]->[DMA addr 1]->[DMA addr 2]->[DMA addr 3]-+
+---------------------------------------------------------+
Driver will allocate each DMA buffer of 4MiB. The finished buffer
will be copied to the perf AUX buffer allocated by the perf core.
Once the AUX buffer is full while the trace is still on, driver
will commit the AUX buffer first and then apply for a new one with
the same size. The size of AUX buffer is default to 16MiB. User can
adjust the size by specifying the `-m` parameter of the perf command.
6. Decoding
-----------
You can decode the traced data with `perf report -D` command (currently
only support to dump the raw trace data). The traced data will be decoded
according to the format described previously (take 8DW as an example):
::
[...perf headers and other information]
. ... HISI PTT data: size 4194304 bytes
. 00000000: 00 00 00 00 Prefix
. 00000004: 01 00 00 60 Header DW0
. 00000008: 0f 1e 00 01 Header DW1
. 0000000c: 04 00 00 00 Header DW2
. 00000010: 40 00 81 02 Header DW3
. 00000014: 33 c0 04 00 Time
. 00000020: 00 00 00 00 Prefix
. 00000024: 01 00 00 60 Header DW0
. 00000028: 0f 1e 00 01 Header DW1
. 0000002c: 04 00 00 00 Header DW2
. 00000030: 40 00 81 02 Header DW3
. 00000034: 02 00 00 00 Time
. 00000040: 00 00 00 00 Prefix
. 00000044: 01 00 00 60 Header DW0
. 00000048: 0f 1e 00 01 Header DW1
. 0000004c: 04 00 00 00 Header DW2
. 00000050: 40 00 81 02 Header DW3
[...]
Documentation/trace/index.rst
View file @ 8be7dfc6
......@@ -33,3 +33,4 @@ Linux Tracing Technologies
coresight/index
user_events
rv/index
hisi-ptt
MAINTAINERS
View file @ 8be7dfc6
......@@ -9180,6 +9180,14 @@ S: Supported
F: Documentation/admin-guide/perf/hns3-pmu.rst
F: drivers/perf/hisilicon/hns3_pmu.c
HISILICON PTT DRIVER
M: Yicong Yang <yangyicong@hisilicon.com>
L: linux-kernel@vger.kernel.org
S: Maintained
F: Documentation/ABI/testing/sysfs-devices-hisi_ptt
F: Documentation/trace/hisi-ptt.rst
F: drivers/hwtracing/ptt/
HISILICON QM DRIVER
M: Weili Qian <qianweili@huawei.com>
M: Zhou Wang <wangzhou1@hisilicon.com>
......
arch/arm64/include/asm/sysreg.h
View file @ 8be7dfc6
......@@ -1021,6 +1021,7 @@
#define SYS_MPIDR_SAFE_VAL (BIT(31))
#define TRFCR_ELx_TS_SHIFT 5
#define TRFCR_ELx_TS_MASK ((0x3UL) << TRFCR_ELx_TS_SHIFT)
#define TRFCR_ELx_TS_VIRTUAL ((0x1UL) << TRFCR_ELx_TS_SHIFT)
#define TRFCR_ELx_TS_GUEST_PHYSICAL ((0x2UL) << TRFCR_ELx_TS_SHIFT)
#define TRFCR_ELx_TS_PHYSICAL ((0x3UL) << TRFCR_ELx_TS_SHIFT)
......
drivers/Makefile
View file @ 8be7dfc6
......@@ -175,6 +175,7 @@ obj-$(CONFIG_USB4) += thunderbolt/
obj-$(CONFIG_CORESIGHT) += hwtracing/coresight/
obj-y += hwtracing/intel_th/
obj-$(CONFIG_STM) += hwtracing/stm/
obj-$(CONFIG_HISI_PTT) += hwtracing/ptt/
obj-y += android/
obj-$(CONFIG_NVMEM) += nvmem/
obj-$(CONFIG_FPGA) += fpga/
......
drivers/hwtracing/Kconfig
View file @ 8be7dfc6
......@@ -5,4 +5,6 @@ source "drivers/hwtracing/stm/Kconfig"
source "drivers/hwtracing/intel_th/Kconfig"
source "drivers/hwtracing/ptt/Kconfig"
endmenu
drivers/hwtracing/coresight/Kconfig
View file @ 8be7dfc6
......@@ -193,10 +193,10 @@ config CORESIGHT_TRBE
depends on ARM64 && CORESIGHT_SOURCE_ETM4X
help
This driver provides support for percpu Trace Buffer Extension (TRBE).
TRBE always needs to be used along with it's corresponding percpu ETE
TRBE always needs to be used along with its corresponding percpu ETE
component. ETE generates trace data which is then captured with TRBE.
Unlike traditional sink devices, TRBE is a CPU feature accessible via
system registers. But it's explicit dependency with trace unit (ETE)
system registers. But its explicit dependency with trace unit (ETE)
requires it to be plugged in as a coresight sink device.
To compile this driver as a module, choose M here: the module will be
......
drivers/hwtracing/coresight/coresight-catu.c
View file @ 8be7dfc6
......@@ -365,26 +365,15 @@ static const struct etr_buf_operations etr_catu_buf_ops = {
.get_data = catu_get_data_etr_buf,
};
coresight_simple_reg32(struct catu_drvdata, devid, CORESIGHT_DEVID);
coresight_simple_reg32(struct catu_drvdata, control, CATU_CONTROL);
coresight_simple_reg32(struct catu_drvdata, status, CATU_STATUS);
coresight_simple_reg32(struct catu_drvdata, mode, CATU_MODE);
coresight_simple_reg32(struct catu_drvdata, axictrl, CATU_AXICTRL);
coresight_simple_reg32(struct catu_drvdata, irqen, CATU_IRQEN);
coresight_simple_reg64(struct catu_drvdata, sladdr,
CATU_SLADDRLO, CATU_SLADDRHI);
coresight_simple_reg64(struct catu_drvdata, inaddr,
CATU_INADDRLO, CATU_INADDRHI);
static struct attribute *catu_mgmt_attrs[] = {
&dev_attr_devid.attr,
&dev_attr_control.attr,
&dev_attr_status.attr,
&dev_attr_mode.attr,
&dev_attr_axictrl.attr,
&dev_attr_irqen.attr,
&dev_attr_sladdr.attr,
&dev_attr_inaddr.attr,
coresight_simple_reg32(devid, CORESIGHT_DEVID),
coresight_simple_reg32(control, CATU_CONTROL),
coresight_simple_reg32(status, CATU_STATUS),
coresight_simple_reg32(mode, CATU_MODE),
coresight_simple_reg32(axictrl, CATU_AXICTRL),
coresight_simple_reg32(irqen, CATU_IRQEN),
coresight_simple_reg64(sladdr, CATU_SLADDRLO, CATU_SLADDRHI),
coresight_simple_reg64(inaddr, CATU_INADDRLO, CATU_INADDRHI),
NULL,
};
......
drivers/hwtracing/coresight/coresight-catu.h
View file @ 8be7dfc6
......@@ -70,24 +70,24 @@ struct catu_drvdata {
static inline u32 \
catu_read_##name(struct catu_drvdata *drvdata) \
{ \
return coresight_read_reg_pair(drvdata->base, offset, -1); \
return csdev_access_relaxed_read32(&drvdata->csdev->access, offset); \
} \
static inline void \
catu_write_##name(struct catu_drvdata *drvdata, u32 val) \
{ \
coresight_write_reg_pair(drvdata->base, val, offset, -1); \
csdev_access_relaxed_write32(&drvdata->csdev->access, val, offset); \
}
#define CATU_REG_PAIR(name, lo_off, hi_off) \
static inline u64 \
catu_read_##name(struct catu_drvdata *drvdata) \
{ \
return coresight_read_reg_pair(drvdata->base, lo_off, hi_off); \
return csdev_access_relaxed_read_pair(&drvdata->csdev->access, lo_off, hi_off); \
} \
static inline void \
catu_write_##name(struct catu_drvdata *drvdata, u64 val) \
{ \
coresight_write_reg_pair(drvdata->base, val, lo_off, hi_off); \
csdev_access_relaxed_write_pair(&drvdata->csdev->access, val, lo_off, hi_off); \
}
CATU_REG32(control, CATU_CONTROL);
......
drivers/hwtracing/coresight/coresight-core.c
View file @ 8be7dfc6
......@@ -60,6 +60,34 @@ EXPORT_SYMBOL_GPL(coresight_barrier_pkt);
static const struct cti_assoc_op *cti_assoc_ops;
ssize_t coresight_simple_show_pair(struct device *_dev,
struct device_attribute *attr, char *buf)
{
struct coresight_device *csdev = container_of(_dev, struct coresight_device, dev);
struct cs_pair_attribute *cs_attr = container_of(attr, struct cs_pair_attribute, attr);
u64 val;
pm_runtime_get_sync(_dev->parent);
val = csdev_access_relaxed_read_pair(&csdev->access, cs_attr->lo_off, cs_attr->hi_off);
pm_runtime_put_sync(_dev->parent);
return sysfs_emit(buf, "0x%llx\n", val);
}
EXPORT_SYMBOL_GPL(coresight_simple_show_pair);
ssize_t coresight_simple_show32(struct device *_dev,
struct device_attribute *attr, char *buf)
{
struct coresight_device *csdev = container_of(_dev, struct coresight_device, dev);
struct cs_off_attribute *cs_attr = container_of(attr, struct cs_off_attribute, attr);
u64 val;
pm_runtime_get_sync(_dev->parent);
val = csdev_access_relaxed_read32(&csdev->access, cs_attr->off);
pm_runtime_put_sync(_dev->parent);
return sysfs_emit(buf, "0x%llx\n", val);
}
EXPORT_SYMBOL_GPL(coresight_simple_show32);
void coresight_set_cti_ops(const struct cti_assoc_op *cti_op)
{
cti_assoc_ops = cti_op;
......
drivers/hwtracing/coresight/coresight-cti-sysfs.c
View file @ 8be7dfc6
......@@ -163,48 +163,82 @@ static struct attribute *coresight_cti_attrs[] = {
/* register based attributes */
/* macro to access RO registers with power check only (no enable check). */
#define coresight_cti_reg(name, offset) \
static ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \
u32 val = 0; \
pm_runtime_get_sync(dev->parent); \
spin_lock(&drvdata->spinlock); \
if (drvdata->config.hw_powered) \
val = readl_relaxed(drvdata->base + offset); \
spin_unlock(&drvdata->spinlock); \
pm_runtime_put_sync(dev->parent); \
return sprintf(buf, "0x%x\n", val); \
} \
static DEVICE_ATTR_RO(name)
/* Read registers with power check only (no enable check). */
static ssize_t coresight_cti_reg_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
struct cs_off_attribute *cti_attr = container_of(attr, struct cs_off_attribute, attr);
u32 val = 0;
/* coresight management registers */
coresight_cti_reg(devaff0, CTIDEVAFF0);
coresight_cti_reg(devaff1, CTIDEVAFF1);
coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS);
coresight_cti_reg(devarch, CORESIGHT_DEVARCH);
coresight_cti_reg(devid, CORESIGHT_DEVID);
coresight_cti_reg(devtype, CORESIGHT_DEVTYPE);
coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0);
coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1);
coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2);
coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3);
coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4);
pm_runtime_get_sync(dev->parent);
spin_lock(&drvdata->spinlock);
if (drvdata->config.hw_powered)
val = readl_relaxed(drvdata->base + cti_attr->off);
spin_unlock(&drvdata->spinlock);
pm_runtime_put_sync(dev->parent);
return sysfs_emit(buf, "0x%x\n", val);
}
/* Write registers with power check only (no enable check). */
static __maybe_unused ssize_t coresight_cti_reg_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
struct cs_off_attribute *cti_attr = container_of(attr, struct cs_off_attribute, attr);
unsigned long val = 0;
if (kstrtoul(buf, 0, &val))
return -EINVAL;
pm_runtime_get_sync(dev->parent);
spin_lock(&drvdata->spinlock);
if (drvdata->config.hw_powered)
cti_write_single_reg(drvdata, cti_attr->off, val);
spin_unlock(&drvdata->spinlock);
pm_runtime_put_sync(dev->parent);
return size;
}
#define coresight_cti_reg(name, offset) \
(&((struct cs_off_attribute[]) { \
{ \
__ATTR(name, 0444, coresight_cti_reg_show, NULL), \
offset \
} \
})[0].attr.attr)
#define coresight_cti_reg_rw(name, offset) \
(&((struct cs_off_attribute[]) { \
{ \
__ATTR(name, 0644, coresight_cti_reg_show, \
coresight_cti_reg_store), \
offset \
} \
})[0].attr.attr)
#define coresight_cti_reg_wo(name, offset) \
(&((struct cs_off_attribute[]) { \
{ \
__ATTR(name, 0200, NULL, coresight_cti_reg_store), \
offset \
} \
})[0].attr.attr)
/* coresight management registers */
static struct attribute *coresight_cti_mgmt_attrs[] = {
&dev_attr_devaff0.attr,
&dev_attr_devaff1.attr,
&dev_attr_authstatus.attr,
&dev_attr_devarch.attr,
&dev_attr_devid.attr,
&dev_attr_devtype.attr,
&dev_attr_pidr0.attr,
&dev_attr_pidr1.attr,
&dev_attr_pidr2.attr,
&dev_attr_pidr3.attr,
&dev_attr_pidr4.attr,
coresight_cti_reg(devaff0, CTIDEVAFF0),
coresight_cti_reg(devaff1, CTIDEVAFF1),
coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS),
coresight_cti_reg(devarch, CORESIGHT_DEVARCH),
coresight_cti_reg(devid, CORESIGHT_DEVID),
coresight_cti_reg(devtype, CORESIGHT_DEVTYPE),
coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0),
coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1),
coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2),
coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3),
coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4),
NULL,
};
......@@ -454,86 +488,11 @@ static ssize_t apppulse_store(struct device *dev,
}
static DEVICE_ATTR_WO(apppulse);
coresight_cti_reg(triginstatus, CTITRIGINSTATUS);
coresight_cti_reg(trigoutstatus, CTITRIGOUTSTATUS);
coresight_cti_reg(chinstatus, CTICHINSTATUS);
coresight_cti_reg(choutstatus, CTICHOUTSTATUS);
/*
* Define CONFIG_CORESIGHT_CTI_INTEGRATION_REGS to enable the access to the
* integration control registers. Normally only used to investigate connection
* data.
*/
#ifdef CONFIG_CORESIGHT_CTI_INTEGRATION_REGS
/* macro to access RW registers with power check only (no enable check). */
#define coresight_cti_reg_rw(name, offset) \
static ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \
u32 val = 0; \
pm_runtime_get_sync(dev->parent); \
spin_lock(&drvdata->spinlock); \
if (drvdata->config.hw_powered) \
val = readl_relaxed(drvdata->base + offset); \
spin_unlock(&drvdata->spinlock); \
pm_runtime_put_sync(dev->parent); \
return sprintf(buf, "0x%x\n", val); \
} \
\
static ssize_t name##_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t size) \
{ \
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \
unsigned long val = 0; \
if (kstrtoul(buf, 0, &val)) \
return -EINVAL; \
\
pm_runtime_get_sync(dev->parent); \
spin_lock(&drvdata->spinlock); \
if (drvdata->config.hw_powered) \
cti_write_single_reg(drvdata, offset, val); \
spin_unlock(&drvdata->spinlock); \
pm_runtime_put_sync(dev->parent); \
return size; \
} \
static DEVICE_ATTR_RW(name)
/* macro to access WO registers with power check only (no enable check). */
#define coresight_cti_reg_wo(name, offset) \
static ssize_t name##_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t size) \
{ \
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \
unsigned long val = 0; \
if (kstrtoul(buf, 0, &val)) \
return -EINVAL; \
\
pm_runtime_get_sync(dev->parent); \
spin_lock(&drvdata->spinlock); \
if (drvdata->config.hw_powered) \
cti_write_single_reg(drvdata, offset, val); \
spin_unlock(&drvdata->spinlock); \
pm_runtime_put_sync(dev->parent); \
return size; \
} \
static DEVICE_ATTR_WO(name)
coresight_cti_reg_rw(itchout, ITCHOUT);
coresight_cti_reg_rw(ittrigout, ITTRIGOUT);
coresight_cti_reg_rw(itctrl, CORESIGHT_ITCTRL);
coresight_cti_reg_wo(itchinack, ITCHINACK);
coresight_cti_reg_wo(ittriginack, ITTRIGINACK);
coresight_cti_reg(ittrigin, ITTRIGIN);
coresight_cti_reg(itchin, ITCHIN);
coresight_cti_reg(itchoutack, ITCHOUTACK);
coresight_cti_reg(ittrigoutack, ITTRIGOUTACK);
#endif /* CORESIGHT_CTI_INTEGRATION_REGS */
static struct attribute *coresight_cti_regs_attrs[] = {
&dev_attr_inout_sel.attr,
&dev_attr_inen.attr,
......@@ -544,20 +503,20 @@ static struct attribute *coresight_cti_regs_attrs[] = {
&dev_attr_appset.attr,
&dev_attr_appclear.attr,
&dev_attr_apppulse.attr,
&dev_attr_triginstatus.attr,
&dev_attr_trigoutstatus.attr,
&dev_attr_chinstatus.attr,
&dev_attr_choutstatus.attr,
coresight_cti_reg(triginstatus, CTITRIGINSTATUS),
coresight_cti_reg(trigoutstatus, CTITRIGOUTSTATUS),
coresight_cti_reg(chinstatus, CTICHINSTATUS),
coresight_cti_reg(choutstatus, CTICHOUTSTATUS),
#ifdef CONFIG_CORESIGHT_CTI_INTEGRATION_REGS
&dev_attr_itctrl.attr,
&dev_attr_ittrigin.attr,
&dev_attr_itchin.attr,
&dev_attr_ittrigout.attr,
&dev_attr_itchout.attr,
&dev_attr_itchoutack.attr,
&dev_attr_ittrigoutack.attr,
&dev_attr_ittriginack.attr,
&dev_attr_itchinack.attr,
coresight_cti_reg_rw(itctrl, CORESIGHT_ITCTRL),
coresight_cti_reg(ittrigin, ITTRIGIN),
coresight_cti_reg(itchin, ITCHIN),
coresight_cti_reg_rw(ittrigout, ITTRIGOUT),
coresight_cti_reg_rw(itchout, ITCHOUT),
coresight_cti_reg(itchoutack, ITCHOUTACK),
coresight_cti_reg(ittrigoutack, ITTRIGOUTACK),
coresight_cti_reg_wo(ittriginack, ITTRIGINACK),
coresight_cti_reg_wo(itchinack, ITCHINACK),
#endif
NULL,
};
......
drivers/hwtracing/coresight/coresight-etb10.c
View file @ 8be7dfc6
......@@ -655,27 +655,15 @@ static const struct file_operations etb_fops = {
.llseek = no_llseek,
};
#define coresight_etb10_reg(name, offset) \
coresight_simple_reg32(struct etb_drvdata, name, offset)
coresight_etb10_reg(rdp, ETB_RAM_DEPTH_REG);
coresight_etb10_reg(sts, ETB_STATUS_REG);
coresight_etb10_reg(rrp, ETB_RAM_READ_POINTER);
coresight_etb10_reg(rwp, ETB_RAM_WRITE_POINTER);
coresight_etb10_reg(trg, ETB_TRG);
coresight_etb10_reg(ctl, ETB_CTL_REG);
coresight_etb10_reg(ffsr, ETB_FFSR);
coresight_etb10_reg(ffcr, ETB_FFCR);
static struct attribute *coresight_etb_mgmt_attrs[] = {
&dev_attr_rdp.attr,
&dev_attr_sts.attr,
&dev_attr_rrp.attr,
&dev_attr_rwp.attr,
&dev_attr_trg.attr,
&dev_attr_ctl.attr,
&dev_attr_ffsr.attr,
&dev_attr_ffcr.attr,
coresight_simple_reg32(rdp, ETB_RAM_DEPTH_REG),
coresight_simple_reg32(sts, ETB_STATUS_REG),
coresight_simple_reg32(rrp, ETB_RAM_READ_POINTER),
coresight_simple_reg32(rwp, ETB_RAM_WRITE_POINTER),
coresight_simple_reg32(trg, ETB_TRG),
coresight_simple_reg32(ctl, ETB_CTL_REG),
coresight_simple_reg32(ffsr, ETB_FFSR),
coresight_simple_reg32(ffcr, ETB_FFCR),
NULL,
};
......
drivers/hwtracing/coresight/coresight-etm3x-sysfs.c
View file @ 8be7dfc6
......@@ -1252,31 +1252,17 @@ static struct attribute *coresight_etm_attrs[] = {
NULL,
};
#define coresight_etm3x_reg(name, offset) \
coresight_simple_reg32(struct etm_drvdata, name, offset)
coresight_etm3x_reg(etmccr, ETMCCR);
coresight_etm3x_reg(etmccer, ETMCCER);
coresight_etm3x_reg(etmscr, ETMSCR);
coresight_etm3x_reg(etmidr, ETMIDR);
coresight_etm3x_reg(etmcr, ETMCR);
coresight_etm3x_reg(etmtraceidr, ETMTRACEIDR);
coresight_etm3x_reg(etmteevr, ETMTEEVR);
coresight_etm3x_reg(etmtssvr, ETMTSSCR);
coresight_etm3x_reg(etmtecr1, ETMTECR1);
coresight_etm3x_reg(etmtecr2, ETMTECR2);
static struct attribute *coresight_etm_mgmt_attrs[] = {
&dev_attr_etmccr.attr,
&dev_attr_etmccer.attr,
&dev_attr_etmscr.attr,
&dev_attr_etmidr.attr,
&dev_attr_etmcr.attr,
&dev_attr_etmtraceidr.attr,
&dev_attr_etmteevr.attr,
&dev_attr_etmtssvr.attr,
&dev_attr_etmtecr1.attr,
&dev_attr_etmtecr2.attr,
coresight_simple_reg32(etmccr, ETMCCR),
coresight_simple_reg32(etmccer, ETMCCER),
coresight_simple_reg32(etmscr, ETMSCR),
coresight_simple_reg32(etmidr, ETMIDR),
coresight_simple_reg32(etmcr, ETMCR),
coresight_simple_reg32(etmtraceidr, ETMTRACEIDR),
coresight_simple_reg32(etmteevr, ETMTEEVR),
coresight_simple_reg32(etmtssvr, ETMTSSCR),
coresight_simple_reg32(etmtecr1, ETMTECR1),
coresight_simple_reg32(etmtecr2, ETMTECR2),
NULL,
};
......
drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
View file @ 8be7dfc6
......@@ -2306,6 +2306,34 @@ static ssize_t cpu_show(struct device *dev,
}
static DEVICE_ATTR_RO(cpu);
static ssize_t ts_source_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int val;
struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
if (!drvdata->trfcr) {
val = -1;
goto out;
}
switch (drvdata->trfcr & TRFCR_ELx_TS_MASK) {
case TRFCR_ELx_TS_VIRTUAL:
case TRFCR_ELx_TS_GUEST_PHYSICAL:
case TRFCR_ELx_TS_PHYSICAL:
val = FIELD_GET(TRFCR_ELx_TS_MASK, drvdata->trfcr);
break;
default:
val = -1;
break;
}
out:
return sysfs_emit(buf, "%d\n", val);
}
static DEVICE_ATTR_RO(ts_source);
static struct attribute *coresight_etmv4_attrs[] = {
&dev_attr_nr_pe_cmp.attr,
&dev_attr_nr_addr_cmp.attr,
......@@ -2360,6 +2388,7 @@ static struct attribute *coresight_etmv4_attrs[] = {
&dev_attr_vmid_val.attr,
&dev_attr_vmid_masks.attr,
&dev_attr_cpu.attr,
&dev_attr_ts_source.attr,
NULL,
};
......
drivers/hwtracing/coresight/coresight-priv.h
View file @ 8be7dfc6
......@@ -39,32 +39,37 @@
#define ETM_MODE_EXCL_KERN BIT(30)
#define ETM_MODE_EXCL_USER BIT(31)
struct cs_pair_attribute {
struct device_attribute attr;
u32 lo_off;
u32 hi_off;
};
struct cs_off_attribute {
struct device_attribute attr;
u32 off;
};
typedef u32 (*coresight_read_fn)(const struct device *, u32 offset);
#define __coresight_simple_func(type, func, name, lo_off, hi_off) \
static ssize_t name##_show(struct device *_dev, \
struct device_attribute *attr, char *buf) \
{ \
type *drvdata = dev_get_drvdata(_dev->parent); \
coresight_read_fn fn = func; \
u64 val; \
pm_runtime_get_sync(_dev->parent); \
if (fn) \
val = (u64)fn(_dev->parent, lo_off); \
else \
val = coresight_read_reg_pair(drvdata->base, \
lo_off, hi_off); \
pm_runtime_put_sync(_dev->parent); \
return scnprintf(buf, PAGE_SIZE, "0x%llx\n", val); \
} \
static DEVICE_ATTR_RO(name)
#define coresight_simple_func(type, func, name, offset) \
__coresight_simple_func(type, func, name, offset, -1)
#define coresight_simple_reg32(type, name, offset) \
__coresight_simple_func(type, NULL, name, offset, -1)
#define coresight_simple_reg64(type, name, lo_off, hi_off) \
__coresight_simple_func(type, NULL, name, lo_off, hi_off)
extern ssize_t coresight_simple_show32(struct device *_dev,
struct device_attribute *attr, char *buf);
extern ssize_t coresight_simple_show_pair(struct device *_dev,
struct device_attribute *attr, char *buf);
#define coresight_simple_reg32(name, offset) \
(&((struct cs_off_attribute[]) { \
{ \
__ATTR(name, 0444, coresight_simple_show32, NULL), \
offset \
} \
})[0].attr.attr)
#define coresight_simple_reg64(name, lo_off, hi_off) \
(&((struct cs_pair_attribute[]) { \
{ \
__ATTR(name, 0444, coresight_simple_show_pair, NULL), \
lo_off, hi_off \
} \
})[0].attr.attr)
extern const u32 coresight_barrier_pkt[4];
#define CORESIGHT_BARRIER_PKT_SIZE (sizeof(coresight_barrier_pkt))
......@@ -127,25 +132,6 @@ static inline void CS_UNLOCK(void __iomem *addr)
} while (0);
}
static inline u64
coresight_read_reg_pair(void __iomem *addr, s32 lo_offset, s32 hi_offset)
{
u64 val;
val = readl_relaxed(addr + lo_offset);
val |= (hi_offset < 0) ? 0 :
(u64)readl_relaxed(addr + hi_offset) << 32;
return val;
}
static inline void coresight_write_reg_pair(void __iomem *addr, u64 val,
s32 lo_offset, s32 hi_offset)
{
writel_relaxed((u32)val, addr + lo_offset);
if (hi_offset >= 0)
writel_relaxed((u32)(val >> 32), addr + hi_offset);
}
void coresight_disable_path(struct list_head *path);
int coresight_enable_path(struct list_head *path, u32 mode, void *sink_data);
struct coresight_device *coresight_get_sink(struct list_head *path);
......
drivers/hwtracing/coresight/coresight-replicator.c
View file @ 8be7dfc6
......@@ -196,15 +196,9 @@ static const struct coresight_ops replicator_cs_ops = {
.link_ops = &replicator_link_ops,
};
#define coresight_replicator_reg(name, offset) \
coresight_simple_reg32(struct replicator_drvdata, name, offset)
coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0);
coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1);
static struct attribute *replicator_mgmt_attrs[] = {
&dev_attr_idfilter0.attr,
&dev_attr_idfilter1.attr,
coresight_simple_reg32(idfilter0, REPLICATOR_IDFILTER0),
coresight_simple_reg32(idfilter1, REPLICATOR_IDFILTER1),
NULL,
};
......
drivers/hwtracing/coresight/coresight-stm.c
View file @ 8be7dfc6
......@@ -634,22 +634,6 @@ static ssize_t traceid_store(struct device *dev,
}
static DEVICE_ATTR_RW(traceid);
#define coresight_stm_reg(name, offset) \
coresight_simple_reg32(struct stm_drvdata, name, offset)
coresight_stm_reg(tcsr, STMTCSR);
coresight_stm_reg(tsfreqr, STMTSFREQR);
coresight_stm_reg(syncr, STMSYNCR);
coresight_stm_reg(sper, STMSPER);
coresight_stm_reg(spter, STMSPTER);
coresight_stm_reg(privmaskr, STMPRIVMASKR);
coresight_stm_reg(spscr, STMSPSCR);
coresight_stm_reg(spmscr, STMSPMSCR);
coresight_stm_reg(spfeat1r, STMSPFEAT1R);
coresight_stm_reg(spfeat2r, STMSPFEAT2R);
coresight_stm_reg(spfeat3r, STMSPFEAT3R);
coresight_stm_reg(devid, CORESIGHT_DEVID);
static struct attribute *coresight_stm_attrs[] = {
&dev_attr_hwevent_enable.attr,
&dev_attr_hwevent_select.attr,
......@@ -660,18 +644,18 @@ static struct attribute *coresight_stm_attrs[] = {
};
static struct attribute *coresight_stm_mgmt_attrs[] = {
&dev_attr_tcsr.attr,
&dev_attr_tsfreqr.attr,
&dev_attr_syncr.attr,
&dev_attr_sper.attr,
&dev_attr_spter.attr,
&dev_attr_privmaskr.attr,
&dev_attr_spscr.attr,
&dev_attr_spmscr.attr,
&dev_attr_spfeat1r.attr,
&dev_attr_spfeat2r.attr,
&dev_attr_spfeat3r.attr,
&dev_attr_devid.attr,
coresight_simple_reg32(tcsr, STMTCSR),
coresight_simple_reg32(tsfreqr, STMTSFREQR),
coresight_simple_reg32(syncr, STMSYNCR),
coresight_simple_reg32(sper, STMSPER),
coresight_simple_reg32(spter, STMSPTER),
coresight_simple_reg32(privmaskr, STMPRIVMASKR),
coresight_simple_reg32(spscr, STMSPSCR),
coresight_simple_reg32(spmscr, STMSPMSCR),
coresight_simple_reg32(spfeat1r, STMSPFEAT1R),
coresight_simple_reg32(spfeat2r, STMSPFEAT2R),
coresight_simple_reg32(spfeat3r, STMSPFEAT3R),
coresight_simple_reg32(devid, CORESIGHT_DEVID),
NULL,
};
......
drivers/hwtracing/coresight/coresight-tmc-core.c
View file @ 8be7dfc6
......@@ -251,41 +251,21 @@ static enum tmc_mem_intf_width tmc_get_memwidth(u32 devid)
return memwidth;
}
#define coresight_tmc_reg(name, offset) \
coresight_simple_reg32(struct tmc_drvdata, name, offset)
#define coresight_tmc_reg64(name, lo_off, hi_off) \
coresight_simple_reg64(struct tmc_drvdata, name, lo_off, hi_off)
coresight_tmc_reg(rsz, TMC_RSZ);
coresight_tmc_reg(sts, TMC_STS);
coresight_tmc_reg(trg, TMC_TRG);
coresight_tmc_reg(ctl, TMC_CTL);
coresight_tmc_reg(ffsr, TMC_FFSR);
coresight_tmc_reg(ffcr, TMC_FFCR);
coresight_tmc_reg(mode, TMC_MODE);
coresight_tmc_reg(pscr, TMC_PSCR);
coresight_tmc_reg(axictl, TMC_AXICTL);
coresight_tmc_reg(authstatus, TMC_AUTHSTATUS);
coresight_tmc_reg(devid, CORESIGHT_DEVID);
coresight_tmc_reg64(rrp, TMC_RRP, TMC_RRPHI);
coresight_tmc_reg64(rwp, TMC_RWP, TMC_RWPHI);
coresight_tmc_reg64(dba, TMC_DBALO, TMC_DBAHI);
static struct attribute *coresight_tmc_mgmt_attrs[] = {
&dev_attr_rsz.attr,
&dev_attr_sts.attr,
&dev_attr_rrp.attr,
&dev_attr_rwp.attr,
&dev_attr_trg.attr,
&dev_attr_ctl.attr,
&dev_attr_ffsr.attr,
&dev_attr_ffcr.attr,
&dev_attr_mode.attr,
&dev_attr_pscr.attr,
&dev_attr_devid.attr,
&dev_attr_dba.attr,
&dev_attr_axictl.attr,
&dev_attr_authstatus.attr,
coresight_simple_reg32(rsz, TMC_RSZ),
coresight_simple_reg32(sts, TMC_STS),
coresight_simple_reg64(rrp, TMC_RRP, TMC_RRPHI),
coresight_simple_reg64(rwp, TMC_RWP, TMC_RWPHI),
coresight_simple_reg32(trg, TMC_TRG),
coresight_simple_reg32(ctl, TMC_CTL),
coresight_simple_reg32(ffsr, TMC_FFSR),
coresight_simple_reg32(ffcr, TMC_FFCR),
coresight_simple_reg32(mode, TMC_MODE),
coresight_simple_reg32(pscr, TMC_PSCR),
coresight_simple_reg32(devid, CORESIGHT_DEVID),
coresight_simple_reg64(dba, TMC_DBALO, TMC_DBAHI),
coresight_simple_reg32(axictl, TMC_AXICTL),
coresight_simple_reg32(authstatus, TMC_AUTHSTATUS),
NULL,
};
......
drivers/hwtracing/coresight/coresight-tmc.h
View file @ 8be7dfc6
......@@ -282,12 +282,12 @@ ssize_t tmc_etr_get_sysfs_trace(struct tmc_drvdata *drvdata,
static inline u64 \
tmc_read_##name(struct tmc_drvdata *drvdata) \
{ \
return coresight_read_reg_pair(drvdata->base, lo_off, hi_off); \
return csdev_access_relaxed_read_pair(&drvdata->csdev->access, lo_off, hi_off); \
} \
static inline void \
tmc_write_##name(struct tmc_drvdata *drvdata, u64 val) \
{ \
coresight_write_reg_pair(drvdata->base, val, lo_off, hi_off); \
csdev_access_relaxed_write_pair(&drvdata->csdev->access, val, lo_off, hi_off); \
}
TMC_REG_PAIR(rrp, TMC_RRP, TMC_RRPHI)
......
drivers/hwtracing/ptt/Kconfig 0 → 100644
View file @ 8be7dfc6
# SPDX-License-Identifier: GPL-2.0-only
config HISI_PTT
tristate "HiSilicon PCIe Tune and Trace Device"
depends on ARM64 || (COMPILE_TEST && 64BIT)
depends on PCI && HAS_DMA && HAS_IOMEM && PERF_EVENTS
help
HiSilicon PCIe Tune and Trace device exists as a PCIe RCiEP
device, and it provides support for PCIe traffic tuning and
tracing TLP headers to the memory.
This driver can also be built as a module. If so, the module
will be called hisi_ptt.
drivers/hwtracing/ptt/Makefile 0 → 100644
View file @ 8be7dfc6
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_HISI_PTT) += hisi_ptt.o
drivers/hwtracing/ptt/hisi_ptt.c 0 → 100644
View file @ 8be7dfc6
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for HiSilicon PCIe tune and trace device
*
* Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
* Author: Yicong Yang <yangyicong@hisilicon.com>
*/
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/cpuhotplug.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/sysfs.h>
#include <linux/vmalloc.h>
#include "hisi_ptt.h"
/* Dynamic CPU hotplug state used by PTT */
static enum cpuhp_state hisi_ptt_pmu_online;
static bool hisi_ptt_wait_tuning_finish(struct hisi_ptt *hisi_ptt)
{
u32 val;
return !readl_poll_timeout(hisi_ptt->iobase + HISI_PTT_TUNING_INT_STAT,
val, !(val & HISI_PTT_TUNING_INT_STAT_MASK),
HISI_PTT_WAIT_POLL_INTERVAL_US,
HISI_PTT_WAIT_TUNE_TIMEOUT_US);
}
static ssize_t hisi_ptt_tune_attr_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(dev_get_drvdata(dev));
struct dev_ext_attribute *ext_attr;
struct hisi_ptt_tune_desc *desc;
u32 reg;
u16 val;
ext_attr = container_of(attr, struct dev_ext_attribute, attr);
desc = ext_attr->var;
mutex_lock(&hisi_ptt->tune_lock);
reg = readl(hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
reg &= ~(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB);
reg |= FIELD_PREP(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB,
desc->event_code);
writel(reg, hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
/* Write all 1 to indicates it's the read process */
writel(~0U, hisi_ptt->iobase + HISI_PTT_TUNING_DATA);
if (!hisi_ptt_wait_tuning_finish(hisi_ptt)) {
mutex_unlock(&hisi_ptt->tune_lock);
return -ETIMEDOUT;
}
reg = readl(hisi_ptt->iobase + HISI_PTT_TUNING_DATA);
reg &= HISI_PTT_TUNING_DATA_VAL_MASK;
val = FIELD_GET(HISI_PTT_TUNING_DATA_VAL_MASK, reg);
mutex_unlock(&hisi_ptt->tune_lock);
return sysfs_emit(buf, "%u\n", val);
}
static ssize_t hisi_ptt_tune_attr_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(dev_get_drvdata(dev));
struct dev_ext_attribute *ext_attr;
struct hisi_ptt_tune_desc *desc;
u32 reg;
u16 val;
ext_attr = container_of(attr, struct dev_ext_attribute, attr);
desc = ext_attr->var;
if (kstrtou16(buf, 10, &val))
return -EINVAL;
mutex_lock(&hisi_ptt->tune_lock);
reg = readl(hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
reg &= ~(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB);
reg |= FIELD_PREP(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB,
desc->event_code);
writel(reg, hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
writel(FIELD_PREP(HISI_PTT_TUNING_DATA_VAL_MASK, val),
hisi_ptt->iobase + HISI_PTT_TUNING_DATA);
if (!hisi_ptt_wait_tuning_finish(hisi_ptt)) {
mutex_unlock(&hisi_ptt->tune_lock);
return -ETIMEDOUT;
}
mutex_unlock(&hisi_ptt->tune_lock);
return count;
}
#define HISI_PTT_TUNE_ATTR(_name, _val, _show, _store) \
static struct hisi_ptt_tune_desc _name##_desc = { \
.name = #_name, \
.event_code = (_val), \
}; \
static struct dev_ext_attribute hisi_ptt_##_name##_attr = { \
.attr = __ATTR(_name, 0600, _show, _store), \
.var = &_name##_desc, \
}
#define HISI_PTT_TUNE_ATTR_COMMON(_name, _val) \
HISI_PTT_TUNE_ATTR(_name, _val, \
hisi_ptt_tune_attr_show, \
hisi_ptt_tune_attr_store)
/*
* The value of the tuning event are composed of two parts: main event code
* in BIT[0,15] and subevent code in BIT[16,23]. For example, qox_tx_cpl is
* a subevent of 'Tx path QoS control' which for tuning the weight of Tx
* completion TLPs. See hisi_ptt.rst documentation for more information.
*/
#define HISI_PTT_TUNE_QOS_TX_CPL (0x4 | (3 << 16))
#define HISI_PTT_TUNE_QOS_TX_NP (0x4 | (4 << 16))
#define HISI_PTT_TUNE_QOS_TX_P (0x4 | (5 << 16))
#define HISI_PTT_TUNE_RX_ALLOC_BUF_LEVEL (0x5 | (6 << 16))
#define HISI_PTT_TUNE_TX_ALLOC_BUF_LEVEL (0x5 | (7 << 16))
HISI_PTT_TUNE_ATTR_COMMON(qos_tx_cpl, HISI_PTT_TUNE_QOS_TX_CPL);
HISI_PTT_TUNE_ATTR_COMMON(qos_tx_np, HISI_PTT_TUNE_QOS_TX_NP);
HISI_PTT_TUNE_ATTR_COMMON(qos_tx_p, HISI_PTT_TUNE_QOS_TX_P);
HISI_PTT_TUNE_ATTR_COMMON(rx_alloc_buf_level, HISI_PTT_TUNE_RX_ALLOC_BUF_LEVEL);
HISI_PTT_TUNE_ATTR_COMMON(tx_alloc_buf_level, HISI_PTT_TUNE_TX_ALLOC_BUF_LEVEL);
static struct attribute *hisi_ptt_tune_attrs[] = {
&hisi_ptt_qos_tx_cpl_attr.attr.attr,
&hisi_ptt_qos_tx_np_attr.attr.attr,
&hisi_ptt_qos_tx_p_attr.attr.attr,
&hisi_ptt_rx_alloc_buf_level_attr.attr.attr,
&hisi_ptt_tx_alloc_buf_level_attr.attr.attr,
NULL,
};
static struct attribute_group hisi_ptt_tune_group = {
.name = "tune",
.attrs = hisi_ptt_tune_attrs,
};
static u16 hisi_ptt_get_filter_val(u16 devid, bool is_port)
{
if (is_port)
return BIT(HISI_PCIE_CORE_PORT_ID(devid & 0xff));
return devid;
}
static bool hisi_ptt_wait_trace_hw_idle(struct hisi_ptt *hisi_ptt)
{
u32 val;
return !readl_poll_timeout_atomic(hisi_ptt->iobase + HISI_PTT_TRACE_STS,
val, val & HISI_PTT_TRACE_IDLE,
HISI_PTT_WAIT_POLL_INTERVAL_US,
HISI_PTT_WAIT_TRACE_TIMEOUT_US);
}
static void hisi_ptt_wait_dma_reset_done(struct hisi_ptt *hisi_ptt)
{
u32 val;
readl_poll_timeout_atomic(hisi_ptt->iobase + HISI_PTT_TRACE_WR_STS,
val, !val, HISI_PTT_RESET_POLL_INTERVAL_US,
HISI_PTT_RESET_TIMEOUT_US);
}
static void hisi_ptt_trace_end(struct hisi_ptt *hisi_ptt)
{
writel(0, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL);
hisi_ptt->trace_ctrl.started = false;
}
static int hisi_ptt_trace_start(struct hisi_ptt *hisi_ptt)
{
struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl;
u32 val;
int i;
/* Check device idle before start trace */
if (!hisi_ptt_wait_trace_hw_idle(hisi_ptt)) {
pci_err(hisi_ptt->pdev, "Failed to start trace, the device is still busy\n");
return -EBUSY;
}
ctrl->started = true;
/* Reset the DMA before start tracing */
val = readl(hisi_ptt->iobase + HISI_PTT_TRACE_CTRL);
val |= HISI_PTT_TRACE_CTRL_RST;
writel(val, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL);
hisi_ptt_wait_dma_reset_done(hisi_ptt);
val = readl(hisi_ptt->iobase + HISI_PTT_TRACE_CTRL);
val &= ~HISI_PTT_TRACE_CTRL_RST;
writel(val, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL);
/* Reset the index of current buffer */
hisi_ptt->trace_ctrl.buf_index = 0;
/* Zero the trace buffers */
for (i = 0; i < HISI_PTT_TRACE_BUF_CNT; i++)
memset(ctrl->trace_buf[i].addr, 0, HISI_PTT_TRACE_BUF_SIZE);
/* Clear the interrupt status */
writel(HISI_PTT_TRACE_INT_STAT_MASK, hisi_ptt->iobase + HISI_PTT_TRACE_INT_STAT);
writel(0, hisi_ptt->iobase + HISI_PTT_TRACE_INT_MASK);
/* Set the trace control register */
val = FIELD_PREP(HISI_PTT_TRACE_CTRL_TYPE_SEL, ctrl->type);
val |= FIELD_PREP(HISI_PTT_TRACE_CTRL_RXTX_SEL, ctrl->direction);
val |= FIELD_PREP(HISI_PTT_TRACE_CTRL_DATA_FORMAT, ctrl->format);
val |= FIELD_PREP(HISI_PTT_TRACE_CTRL_TARGET_SEL, hisi_ptt->trace_ctrl.filter);
if (!hisi_ptt->trace_ctrl.is_port)
val |= HISI_PTT_TRACE_CTRL_FILTER_MODE;
/* Start the Trace */
val |= HISI_PTT_TRACE_CTRL_EN;
writel(val, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL);
return 0;
}
static int hisi_ptt_update_aux(struct hisi_ptt *hisi_ptt, int index, bool stop)
{
struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl;
struct perf_output_handle *handle = &ctrl->handle;
struct perf_event *event = handle->event;
struct hisi_ptt_pmu_buf *buf;
size_t size;
void *addr;
buf = perf_get_aux(handle);
if (!buf || !handle->size)
return -EINVAL;
addr = ctrl->trace_buf[ctrl->buf_index].addr;
/*
* If we're going to stop, read the size of already traced data from
* HISI_PTT_TRACE_WR_STS. Otherwise we're coming from the interrupt,
* the data size is always HISI_PTT_TRACE_BUF_SIZE.
*/
if (stop) {
u32 reg;
reg = readl(hisi_ptt->iobase + HISI_PTT_TRACE_WR_STS);
size = FIELD_GET(HISI_PTT_TRACE_WR_STS_WRITE, reg);
} else {
size = HISI_PTT_TRACE_BUF_SIZE;
}
memcpy(buf->base + buf->pos, addr, size);
buf->pos += size;
/*
* Just commit the traced data if we're going to stop. Otherwise if the
* resident AUX buffer cannot contain the data of next trace buffer,
* apply a new one.
*/
if (stop) {
perf_aux_output_end(handle, buf->pos);
} else if (buf->length - buf->pos < HISI_PTT_TRACE_BUF_SIZE) {
perf_aux_output_end(handle, buf->pos);
buf = perf_aux_output_begin(handle, event);
if (!buf)
return -EINVAL;
buf->pos = handle->head % buf->length;
if (buf->length - buf->pos < HISI_PTT_TRACE_BUF_SIZE) {
perf_aux_output_end(handle, 0);
return -EINVAL;
}
}
return 0;
}
static irqreturn_t hisi_ptt_isr(int irq, void *context)
{
struct hisi_ptt *hisi_ptt = context;
u32 status, buf_idx;
status = readl(hisi_ptt->iobase + HISI_PTT_TRACE_INT_STAT);
if (!(status & HISI_PTT_TRACE_INT_STAT_MASK))
return IRQ_NONE;
buf_idx = ffs(status) - 1;
/* Clear the interrupt status of buffer @buf_idx */
writel(status, hisi_ptt->iobase + HISI_PTT_TRACE_INT_STAT);
/*
* Update the AUX buffer and cache the current buffer index,
* as we need to know this and save the data when the trace
* is ended out of the interrupt handler. End the trace
* if the updating fails.
*/
if (hisi_ptt_update_aux(hisi_ptt, buf_idx, false))
hisi_ptt_trace_end(hisi_ptt);
else
hisi_ptt->trace_ctrl.buf_index = (buf_idx + 1) % HISI_PTT_TRACE_BUF_CNT;
return IRQ_HANDLED;
}
static void hisi_ptt_irq_free_vectors(void *pdev)
{
pci_free_irq_vectors(pdev);
}
static int hisi_ptt_register_irq(struct hisi_ptt *hisi_ptt)
{
struct pci_dev *pdev = hisi_ptt->pdev;
int ret;
ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
if (ret < 0) {
pci_err(pdev, "failed to allocate irq vector, ret = %d\n", ret);
return ret;
}
ret = devm_add_action_or_reset(&pdev->dev, hisi_ptt_irq_free_vectors, pdev);
if (ret < 0)
return ret;
ret = devm_request_threaded_irq(&pdev->dev,
pci_irq_vector(pdev, HISI_PTT_TRACE_DMA_IRQ),
NULL, hisi_ptt_isr, 0,
DRV_NAME, hisi_ptt);
if (ret) {
pci_err(pdev, "failed to request irq %d, ret = %d\n",
pci_irq_vector(pdev, HISI_PTT_TRACE_DMA_IRQ), ret);
return ret;
}
return 0;
}
static int hisi_ptt_init_filters(struct pci_dev *pdev, void *data)
{
struct hisi_ptt_filter_desc *filter;
struct hisi_ptt *hisi_ptt = data;
/*
* We won't fail the probe if filter allocation failed here. The filters
* should be partial initialized and users would know which filter fails
* through the log. Other functions of PTT device are still available.
*/
filter = kzalloc(sizeof(*filter), GFP_KERNEL);
if (!filter) {
pci_err(hisi_ptt->pdev, "failed to add filter %s\n", pci_name(pdev));
return -ENOMEM;
}
filter->devid = PCI_DEVID(pdev->bus->number, pdev->devfn);
if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT) {
filter->is_port = true;
list_add_tail(&filter->list, &hisi_ptt->port_filters);
/* Update the available port mask */
hisi_ptt->port_mask |= hisi_ptt_get_filter_val(filter->devid, true);
} else {
list_add_tail(&filter->list, &hisi_ptt->req_filters);
}
return 0;
}
static void hisi_ptt_release_filters(void *data)
{
struct hisi_ptt_filter_desc *filter, *tmp;
struct hisi_ptt *hisi_ptt = data;
list_for_each_entry_safe(filter, tmp, &hisi_ptt->req_filters, list) {
list_del(&filter->list);
kfree(filter);
}
list_for_each_entry_safe(filter, tmp, &hisi_ptt->port_filters, list) {
list_del(&filter->list);
kfree(filter);
}
}
static int hisi_ptt_config_trace_buf(struct hisi_ptt *hisi_ptt)
{
struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl;
struct device *dev = &hisi_ptt->pdev->dev;
int i;
ctrl->trace_buf = devm_kcalloc(dev, HISI_PTT_TRACE_BUF_CNT,
sizeof(*ctrl->trace_buf), GFP_KERNEL);
if (!ctrl->trace_buf)
return -ENOMEM;
for (i = 0; i < HISI_PTT_TRACE_BUF_CNT; ++i) {
ctrl->trace_buf[i].addr = dmam_alloc_coherent(dev, HISI_PTT_TRACE_BUF_SIZE,
&ctrl->trace_buf[i].dma,
GFP_KERNEL);
if (!ctrl->trace_buf[i].addr)
return -ENOMEM;
}
/* Configure the trace DMA buffer */
for (i = 0; i < HISI_PTT_TRACE_BUF_CNT; i++) {
writel(lower_32_bits(ctrl->trace_buf[i].dma),
hisi_ptt->iobase + HISI_PTT_TRACE_ADDR_BASE_LO_0 +
i * HISI_PTT_TRACE_ADDR_STRIDE);
writel(upper_32_bits(ctrl->trace_buf[i].dma),
hisi_ptt->iobase + HISI_PTT_TRACE_ADDR_BASE_HI_0 +
i * HISI_PTT_TRACE_ADDR_STRIDE);
}
writel(HISI_PTT_TRACE_BUF_SIZE, hisi_ptt->iobase + HISI_PTT_TRACE_ADDR_SIZE);
return 0;
}
static int hisi_ptt_init_ctrls(struct hisi_ptt *hisi_ptt)
{
struct pci_dev *pdev = hisi_ptt->pdev;
struct pci_bus *bus;
int ret;
u32 reg;
INIT_LIST_HEAD(&hisi_ptt->port_filters);
INIT_LIST_HEAD(&hisi_ptt->req_filters);
ret = hisi_ptt_config_trace_buf(hisi_ptt);
if (ret)
return ret;
/*
* The device range register provides the information about the root
* ports which the RCiEP can control and trace. The RCiEP and the root
* ports which it supports are on the same PCIe core, with same domain
* number but maybe different bus number. The device range register
* will tell us which root ports we can support, Bit[31:16] indicates
* the upper BDF numbers of the root port, while Bit[15:0] indicates
* the lower.
*/
reg = readl(hisi_ptt->iobase + HISI_PTT_DEVICE_RANGE);
hisi_ptt->upper_bdf = FIELD_GET(HISI_PTT_DEVICE_RANGE_UPPER, reg);
hisi_ptt->lower_bdf = FIELD_GET(HISI_PTT_DEVICE_RANGE_LOWER, reg);
bus = pci_find_bus(pci_domain_nr(pdev->bus), PCI_BUS_NUM(hisi_ptt->upper_bdf));
if (bus)
pci_walk_bus(bus, hisi_ptt_init_filters, hisi_ptt);
ret = devm_add_action_or_reset(&pdev->dev, hisi_ptt_release_filters, hisi_ptt);
if (ret)
return ret;
hisi_ptt->trace_ctrl.on_cpu = -1;
return 0;
}
static ssize_t cpumask_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(dev_get_drvdata(dev));
const cpumask_t *cpumask = cpumask_of_node(dev_to_node(&hisi_ptt->pdev->dev));
return cpumap_print_to_pagebuf(true, buf, cpumask);
}
static DEVICE_ATTR_RO(cpumask);
static struct attribute *hisi_ptt_cpumask_attrs[] = {
&dev_attr_cpumask.attr,
NULL
};
static const struct attribute_group hisi_ptt_cpumask_attr_group = {
.attrs = hisi_ptt_cpumask_attrs,
};
/*
* Bit 19 indicates the filter type, 1 for Root Port filter and 0 for Requester
* filter. Bit[15:0] indicates the filter value, for Root Port filter it's
* a bit mask of desired ports and for Requester filter it's the Requester ID
* of the desired PCIe function. Bit[18:16] is reserved for extension.
*
* See hisi_ptt.rst documentation for detailed information.
*/
PMU_FORMAT_ATTR(filter, "config:0-19");
PMU_FORMAT_ATTR(direction, "config:20-23");
PMU_FORMAT_ATTR(type, "config:24-31");
PMU_FORMAT_ATTR(format, "config:32-35");
static struct attribute *hisi_ptt_pmu_format_attrs[] = {
&format_attr_filter.attr,
&format_attr_direction.attr,
&format_attr_type.attr,
&format_attr_format.attr,
NULL
};
static struct attribute_group hisi_ptt_pmu_format_group = {
.name = "format",
.attrs = hisi_ptt_pmu_format_attrs,
};
static const struct attribute_group *hisi_ptt_pmu_groups[] = {
&hisi_ptt_cpumask_attr_group,
&hisi_ptt_pmu_format_group,
&hisi_ptt_tune_group,
NULL
};
static int hisi_ptt_trace_valid_direction(u32 val)
{
/*
* The direction values have different effects according to the data
* format (specified in the parentheses). TLP set A/B means different
* set of TLP types. See hisi_ptt.rst documentation for more details.
*/
static const u32 hisi_ptt_trace_available_direction[] = {
0, /* inbound(4DW) or reserved(8DW) */
1, /* outbound(4DW) */
2, /* {in, out}bound(4DW) or inbound(8DW), TLP set A */
3, /* {in, out}bound(4DW) or inbound(8DW), TLP set B */
};
int i;
for (i = 0; i < ARRAY_SIZE(hisi_ptt_trace_available_direction); i++) {
if (val == hisi_ptt_trace_available_direction[i])
return 0;
}
return -EINVAL;
}
static int hisi_ptt_trace_valid_type(u32 val)
{
/* Different types can be set simultaneously */
static const u32 hisi_ptt_trace_available_type[] = {
1, /* posted_request */
2, /* non-posted_request */
4, /* completion */
};
int i;
if (!val)
return -EINVAL;
/*
* Walk the available list and clear the valid bits of
* the config. If there is any resident bit after the
* walk then the config is invalid.
*/
for (i = 0; i < ARRAY_SIZE(hisi_ptt_trace_available_type); i++)
val &= ~hisi_ptt_trace_available_type[i];
if (val)
return -EINVAL;
return 0;
}
static int hisi_ptt_trace_valid_format(u32 val)
{
static const u32 hisi_ptt_trace_availble_format[] = {
0, /* 4DW */
1, /* 8DW */
};
int i;
for (i = 0; i < ARRAY_SIZE(hisi_ptt_trace_availble_format); i++) {
if (val == hisi_ptt_trace_availble_format[i])
return 0;
}
return -EINVAL;
}
static int hisi_ptt_trace_valid_filter(struct hisi_ptt *hisi_ptt, u64 config)
{
unsigned long val, port_mask = hisi_ptt->port_mask;
struct hisi_ptt_filter_desc *filter;
hisi_ptt->trace_ctrl.is_port = FIELD_GET(HISI_PTT_PMU_FILTER_IS_PORT, config);
val = FIELD_GET(HISI_PTT_PMU_FILTER_VAL_MASK, config);
/*
* Port filters are defined as bit mask. For port filters, check
* the bits in the @val are within the range of hisi_ptt->port_mask
* and whether it's empty or not, otherwise user has specified
* some unsupported root ports.
*
* For Requester ID filters, walk the available filter list to see
* whether we have one matched.
*/
if (!hisi_ptt->trace_ctrl.is_port) {
list_for_each_entry(filter, &hisi_ptt->req_filters, list) {
if (val == hisi_ptt_get_filter_val(filter->devid, filter->is_port))
return 0;
}
} else if (bitmap_subset(&val, &port_mask, BITS_PER_LONG)) {
return 0;
}
return -EINVAL;
}
static void hisi_ptt_pmu_init_configs(struct hisi_ptt *hisi_ptt, struct perf_event *event)
{
struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl;
u32 val;
val = FIELD_GET(HISI_PTT_PMU_FILTER_VAL_MASK, event->attr.config);
hisi_ptt->trace_ctrl.filter = val;
val = FIELD_GET(HISI_PTT_PMU_DIRECTION_MASK, event->attr.config);
ctrl->direction = val;
val = FIELD_GET(HISI_PTT_PMU_TYPE_MASK, event->attr.config);
ctrl->type = val;
val = FIELD_GET(HISI_PTT_PMU_FORMAT_MASK, event->attr.config);
ctrl->format = val;
}
static int hisi_ptt_pmu_event_init(struct perf_event *event)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu);
int ret;
u32 val;
if (event->cpu < 0) {
dev_dbg(event->pmu->dev, "Per-task mode not supported\n");
return -EOPNOTSUPP;
}
if (event->attr.type != hisi_ptt->hisi_ptt_pmu.type)
return -ENOENT;
ret = hisi_ptt_trace_valid_filter(hisi_ptt, event->attr.config);
if (ret < 0)
return ret;
val = FIELD_GET(HISI_PTT_PMU_DIRECTION_MASK, event->attr.config);
ret = hisi_ptt_trace_valid_direction(val);
if (ret < 0)
return ret;
val = FIELD_GET(HISI_PTT_PMU_TYPE_MASK, event->attr.config);
ret = hisi_ptt_trace_valid_type(val);
if (ret < 0)
return ret;
val = FIELD_GET(HISI_PTT_PMU_FORMAT_MASK, event->attr.config);
return hisi_ptt_trace_valid_format(val);
}
static void *hisi_ptt_pmu_setup_aux(struct perf_event *event, void **pages,
int nr_pages, bool overwrite)
{
struct hisi_ptt_pmu_buf *buf;
struct page **pagelist;
int i;
if (overwrite) {
dev_warn(event->pmu->dev, "Overwrite mode is not supported\n");
return NULL;
}
/* If the pages size less than buffers, we cannot start trace */
if (nr_pages < HISI_PTT_TRACE_TOTAL_BUF_SIZE / PAGE_SIZE)
return NULL;
buf = kzalloc(sizeof(*buf), GFP_KERNEL);
if (!buf)
return NULL;
pagelist = kcalloc(nr_pages, sizeof(*pagelist), GFP_KERNEL);
if (!pagelist)
goto err;
for (i = 0; i < nr_pages; i++)
pagelist[i] = virt_to_page(pages[i]);
buf->base = vmap(pagelist, nr_pages, VM_MAP, PAGE_KERNEL);
if (!buf->base) {
kfree(pagelist);
goto err;
}
buf->nr_pages = nr_pages;
buf->length = nr_pages * PAGE_SIZE;
buf->pos = 0;
kfree(pagelist);
return buf;
err:
kfree(buf);
return NULL;
}
static void hisi_ptt_pmu_free_aux(void *aux)
{
struct hisi_ptt_pmu_buf *buf = aux;
vunmap(buf->base);
kfree(buf);
}
static void hisi_ptt_pmu_start(struct perf_event *event, int flags)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu);
struct perf_output_handle *handle = &hisi_ptt->trace_ctrl.handle;
struct hw_perf_event *hwc = &event->hw;
struct device *dev = event->pmu->dev;
struct hisi_ptt_pmu_buf *buf;
int cpu = event->cpu;
int ret;
hwc->state = 0;
/* Serialize the perf process if user specified several CPUs */
spin_lock(&hisi_ptt->pmu_lock);
if (hisi_ptt->trace_ctrl.started) {
dev_dbg(dev, "trace has already started\n");
goto stop;
}
/*
* Handle the interrupt on the same cpu which starts the trace to avoid
* context mismatch. Otherwise we'll trigger the WARN from the perf
* core in event_function_local(). If CPU passed is offline we'll fail
* here, just log it since we can do nothing here.
*/
ret = irq_set_affinity(pci_irq_vector(hisi_ptt->pdev, HISI_PTT_TRACE_DMA_IRQ),
cpumask_of(cpu));
if (ret)
dev_warn(dev, "failed to set the affinity of trace interrupt\n");
hisi_ptt->trace_ctrl.on_cpu = cpu;
buf = perf_aux_output_begin(handle, event);
if (!buf) {
dev_dbg(dev, "aux output begin failed\n");
goto stop;
}
buf->pos = handle->head % buf->length;
hisi_ptt_pmu_init_configs(hisi_ptt, event);
ret = hisi_ptt_trace_start(hisi_ptt);
if (ret) {
dev_dbg(dev, "trace start failed, ret = %d\n", ret);
perf_aux_output_end(handle, 0);
goto stop;
}
spin_unlock(&hisi_ptt->pmu_lock);
return;
stop:
event->hw.state |= PERF_HES_STOPPED;
spin_unlock(&hisi_ptt->pmu_lock);
}
static void hisi_ptt_pmu_stop(struct perf_event *event, int flags)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu);
struct hw_perf_event *hwc = &event->hw;
if (hwc->state & PERF_HES_STOPPED)
return;
spin_lock(&hisi_ptt->pmu_lock);
if (hisi_ptt->trace_ctrl.started) {
hisi_ptt_trace_end(hisi_ptt);
if (!hisi_ptt_wait_trace_hw_idle(hisi_ptt))
dev_warn(event->pmu->dev, "Device is still busy\n");
hisi_ptt_update_aux(hisi_ptt, hisi_ptt->trace_ctrl.buf_index, true);
}
spin_unlock(&hisi_ptt->pmu_lock);
hwc->state |= PERF_HES_STOPPED;
perf_event_update_userpage(event);
hwc->state |= PERF_HES_UPTODATE;
}
static int hisi_ptt_pmu_add(struct perf_event *event, int flags)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu);
struct hw_perf_event *hwc = &event->hw;
int cpu = event->cpu;
/* Only allow the cpus on the device's node to add the event */
if (!cpumask_test_cpu(cpu, cpumask_of_node(dev_to_node(&hisi_ptt->pdev->dev))))
return 0;
hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
if (flags & PERF_EF_START) {
hisi_ptt_pmu_start(event, PERF_EF_RELOAD);
if (hwc->state & PERF_HES_STOPPED)
return -EINVAL;
}
return 0;
}
static void hisi_ptt_pmu_del(struct perf_event *event, int flags)
{
hisi_ptt_pmu_stop(event, PERF_EF_UPDATE);
}
static void hisi_ptt_remove_cpuhp_instance(void *hotplug_node)
{
cpuhp_state_remove_instance_nocalls(hisi_ptt_pmu_online, hotplug_node);
}
static void hisi_ptt_unregister_pmu(void *pmu)
{
perf_pmu_unregister(pmu);
}
static int hisi_ptt_register_pmu(struct hisi_ptt *hisi_ptt)
{
u16 core_id, sicl_id;
char *pmu_name;
u32 reg;
int ret;
ret = cpuhp_state_add_instance_nocalls(hisi_ptt_pmu_online,
&hisi_ptt->hotplug_node);
if (ret)
return ret;
ret = devm_add_action_or_reset(&hisi_ptt->pdev->dev,
hisi_ptt_remove_cpuhp_instance,
&hisi_ptt->hotplug_node);
if (ret)
return ret;
mutex_init(&hisi_ptt->tune_lock);
spin_lock_init(&hisi_ptt->pmu_lock);
hisi_ptt->hisi_ptt_pmu = (struct pmu) {
.module = THIS_MODULE,
.capabilities = PERF_PMU_CAP_EXCLUSIVE | PERF_PMU_CAP_ITRACE,
.task_ctx_nr = perf_sw_context,
.attr_groups = hisi_ptt_pmu_groups,
.event_init = hisi_ptt_pmu_event_init,
.setup_aux = hisi_ptt_pmu_setup_aux,
.free_aux = hisi_ptt_pmu_free_aux,
.start = hisi_ptt_pmu_start,
.stop = hisi_ptt_pmu_stop,
.add = hisi_ptt_pmu_add,
.del = hisi_ptt_pmu_del,
};
reg = readl(hisi_ptt->iobase + HISI_PTT_LOCATION);
core_id = FIELD_GET(HISI_PTT_CORE_ID, reg);
sicl_id = FIELD_GET(HISI_PTT_SICL_ID, reg);
pmu_name = devm_kasprintf(&hisi_ptt->pdev->dev, GFP_KERNEL, "hisi_ptt%u_%u",
sicl_id, core_id);
if (!pmu_name)
return -ENOMEM;
ret = perf_pmu_register(&hisi_ptt->hisi_ptt_pmu, pmu_name, -1);
if (ret)
return ret;
return devm_add_action_or_reset(&hisi_ptt->pdev->dev,
hisi_ptt_unregister_pmu,
&hisi_ptt->hisi_ptt_pmu);
}
/*
* The DMA of PTT trace can only use direct mappings due to some
* hardware restriction. Check whether there is no IOMMU or the
* policy of the IOMMU domain is passthrough, otherwise the trace
* cannot work.
*
* The PTT device is supposed to behind an ARM SMMUv3, which
* should have passthrough the device by a quirk.
*/
static int hisi_ptt_check_iommu_mapping(struct pci_dev *pdev)
{
struct iommu_domain *iommu_domain;
iommu_domain = iommu_get_domain_for_dev(&pdev->dev);
if (!iommu_domain || iommu_domain->type == IOMMU_DOMAIN_IDENTITY)
return 0;
return -EOPNOTSUPP;
}
static int hisi_ptt_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct hisi_ptt *hisi_ptt;
int ret;
ret = hisi_ptt_check_iommu_mapping(pdev);
if (ret) {
pci_err(pdev, "requires direct DMA mappings\n");
return ret;
}
hisi_ptt = devm_kzalloc(&pdev->dev, sizeof(*hisi_ptt), GFP_KERNEL);
if (!hisi_ptt)
return -ENOMEM;
hisi_ptt->pdev = pdev;
pci_set_drvdata(pdev, hisi_ptt);
ret = pcim_enable_device(pdev);
if (ret) {
pci_err(pdev, "failed to enable device, ret = %d\n", ret);
return ret;
}
ret = pcim_iomap_regions(pdev, BIT(2), DRV_NAME);
if (ret) {
pci_err(pdev, "failed to remap io memory, ret = %d\n", ret);
return ret;
}
hisi_ptt->iobase = pcim_iomap_table(pdev)[2];
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
if (ret) {
pci_err(pdev, "failed to set 64 bit dma mask, ret = %d\n", ret);
return ret;
}
pci_set_master(pdev);
ret = hisi_ptt_register_irq(hisi_ptt);
if (ret)
return ret;
ret = hisi_ptt_init_ctrls(hisi_ptt);
if (ret) {
pci_err(pdev, "failed to init controls, ret = %d\n", ret);
return ret;
}
ret = hisi_ptt_register_pmu(hisi_ptt);
if (ret) {
pci_err(pdev, "failed to register PMU device, ret = %d", ret);
return ret;
}
return 0;
}
static const struct pci_device_id hisi_ptt_id_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, 0xa12e) },
{ }
};
MODULE_DEVICE_TABLE(pci, hisi_ptt_id_tbl);
static struct pci_driver hisi_ptt_driver = {
.name = DRV_NAME,
.id_table = hisi_ptt_id_tbl,
.probe = hisi_ptt_probe,
};
static int hisi_ptt_cpu_teardown(unsigned int cpu, struct hlist_node *node)
{
struct hisi_ptt *hisi_ptt;
struct device *dev;
int target, src;
hisi_ptt = hlist_entry_safe(node, struct hisi_ptt, hotplug_node);
src = hisi_ptt->trace_ctrl.on_cpu;
dev = hisi_ptt->hisi_ptt_pmu.dev;
if (!hisi_ptt->trace_ctrl.started || src != cpu)
return 0;
target = cpumask_any_but(cpumask_of_node(dev_to_node(&hisi_ptt->pdev->dev)), cpu);
if (target >= nr_cpu_ids) {
dev_err(dev, "no available cpu for perf context migration\n");
return 0;
}
perf_pmu_migrate_context(&hisi_ptt->hisi_ptt_pmu, src, target);
/*
* Also make sure the interrupt bind to the migrated CPU as well. Warn
* the user on failure here.
*/
if (irq_set_affinity(pci_irq_vector(hisi_ptt->pdev, HISI_PTT_TRACE_DMA_IRQ),
cpumask_of(target)))
dev_warn(dev, "failed to set the affinity of trace interrupt\n");
hisi_ptt->trace_ctrl.on_cpu = target;
return 0;
}
static int __init hisi_ptt_init(void)
{
int ret;
ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, DRV_NAME, NULL,
hisi_ptt_cpu_teardown);
if (ret < 0)
return ret;
hisi_ptt_pmu_online = ret;
ret = pci_register_driver(&hisi_ptt_driver);
if (ret)
cpuhp_remove_multi_state(hisi_ptt_pmu_online);
return ret;
}
module_init(hisi_ptt_init);
static void __exit hisi_ptt_exit(void)
{
pci_unregister_driver(&hisi_ptt_driver);
cpuhp_remove_multi_state(hisi_ptt_pmu_online);
}
module_exit(hisi_ptt_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yicong Yang <yangyicong@hisilicon.com>");
MODULE_DESCRIPTION("Driver for HiSilicon PCIe tune and trace device");
drivers/hwtracing/ptt/hisi_ptt.h 0 → 100644
View file @ 8be7dfc6
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Driver for HiSilicon PCIe tune and trace device
*
* Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
* Author: Yicong Yang <yangyicong@hisilicon.com>
*/
#ifndef _HISI_PTT_H
#define _HISI_PTT_H
#include <linux/bits.h>
#include <linux/cpumask.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/perf_event.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#define DRV_NAME "hisi_ptt"
/*
* The definition of the device registers and register fields.
*/
#define HISI_PTT_TUNING_CTRL 0x0000
#define HISI_PTT_TUNING_CTRL_CODE GENMASK(15, 0)
#define HISI_PTT_TUNING_CTRL_SUB GENMASK(23, 16)
#define HISI_PTT_TUNING_DATA 0x0004
#define HISI_PTT_TUNING_DATA_VAL_MASK GENMASK(15, 0)
#define HISI_PTT_TRACE_ADDR_SIZE 0x0800
#define HISI_PTT_TRACE_ADDR_BASE_LO_0 0x0810
#define HISI_PTT_TRACE_ADDR_BASE_HI_0 0x0814
#define HISI_PTT_TRACE_ADDR_STRIDE 0x8
#define HISI_PTT_TRACE_CTRL 0x0850
#define HISI_PTT_TRACE_CTRL_EN BIT(0)
#define HISI_PTT_TRACE_CTRL_RST BIT(1)
#define HISI_PTT_TRACE_CTRL_RXTX_SEL GENMASK(3, 2)
#define HISI_PTT_TRACE_CTRL_TYPE_SEL GENMASK(7, 4)
#define HISI_PTT_TRACE_CTRL_DATA_FORMAT BIT(14)
#define HISI_PTT_TRACE_CTRL_FILTER_MODE BIT(15)
#define HISI_PTT_TRACE_CTRL_TARGET_SEL GENMASK(31, 16)
#define HISI_PTT_TRACE_INT_STAT 0x0890
#define HISI_PTT_TRACE_INT_STAT_MASK GENMASK(3, 0)
#define HISI_PTT_TRACE_INT_MASK 0x0894
#define HISI_PTT_TUNING_INT_STAT 0x0898
#define HISI_PTT_TUNING_INT_STAT_MASK BIT(0)
#define HISI_PTT_TRACE_WR_STS 0x08a0
#define HISI_PTT_TRACE_WR_STS_WRITE GENMASK(27, 0)
#define HISI_PTT_TRACE_WR_STS_BUFFER GENMASK(29, 28)
#define HISI_PTT_TRACE_STS 0x08b0
#define HISI_PTT_TRACE_IDLE BIT(0)
#define HISI_PTT_DEVICE_RANGE 0x0fe0
#define HISI_PTT_DEVICE_RANGE_UPPER GENMASK(31, 16)
#define HISI_PTT_DEVICE_RANGE_LOWER GENMASK(15, 0)
#define HISI_PTT_LOCATION 0x0fe8
#define HISI_PTT_CORE_ID GENMASK(15, 0)
#define HISI_PTT_SICL_ID GENMASK(31, 16)
/* Parameters of PTT trace DMA part. */
#define HISI_PTT_TRACE_DMA_IRQ 0
#define HISI_PTT_TRACE_BUF_CNT 4
#define HISI_PTT_TRACE_BUF_SIZE SZ_4M
#define HISI_PTT_TRACE_TOTAL_BUF_SIZE (HISI_PTT_TRACE_BUF_SIZE * \
HISI_PTT_TRACE_BUF_CNT)
/* Wait time for hardware DMA to reset */
#define HISI_PTT_RESET_TIMEOUT_US 10UL
#define HISI_PTT_RESET_POLL_INTERVAL_US 1UL
/* Poll timeout and interval for waiting hardware work to finish */
#define HISI_PTT_WAIT_TUNE_TIMEOUT_US 1000000UL
#define HISI_PTT_WAIT_TRACE_TIMEOUT_US 100UL
#define HISI_PTT_WAIT_POLL_INTERVAL_US 10UL
#define HISI_PCIE_CORE_PORT_ID(devfn) ((PCI_SLOT(devfn) & 0x7) << 1)
/* Definition of the PMU configs */
#define HISI_PTT_PMU_FILTER_IS_PORT BIT(19)
#define HISI_PTT_PMU_FILTER_VAL_MASK GENMASK(15, 0)
#define HISI_PTT_PMU_DIRECTION_MASK GENMASK(23, 20)
#define HISI_PTT_PMU_TYPE_MASK GENMASK(31, 24)
#define HISI_PTT_PMU_FORMAT_MASK GENMASK(35, 32)
/**
* struct hisi_ptt_tune_desc - Describe tune event for PTT tune
* @hisi_ptt: PTT device this tune event belongs to
* @name: name of this event
* @event_code: code of the event
*/
struct hisi_ptt_tune_desc {
struct hisi_ptt *hisi_ptt;
const char *name;
u32 event_code;
};
/**
* struct hisi_ptt_dma_buffer - Describe a single trace buffer of PTT trace.
* The detail of the data format is described
* in the documentation of PTT device.
* @dma: DMA address of this buffer visible to the device
* @addr: virtual address of this buffer visible to the cpu
*/
struct hisi_ptt_dma_buffer {
dma_addr_t dma;
void *addr;
};
/**
* struct hisi_ptt_trace_ctrl - Control and status of PTT trace
* @trace_buf: array of the trace buffers for holding the trace data.
* the length will be HISI_PTT_TRACE_BUF_CNT.
* @handle: perf output handle of current trace session
* @buf_index: the index of current using trace buffer
* @on_cpu: current tracing cpu
* @started: current trace status, true for started
* @is_port: whether we're tracing root port or not
* @direction: direction of the TLP headers to trace
* @filter: filter value for tracing the TLP headers
* @format: format of the TLP headers to trace
* @type: type of the TLP headers to trace
*/
struct hisi_ptt_trace_ctrl {
struct hisi_ptt_dma_buffer *trace_buf;
struct perf_output_handle handle;
u32 buf_index;
int on_cpu;
bool started;
bool is_port;
u32 direction:2;
u32 filter:16;
u32 format:1;
u32 type:4;
};
/**
* struct hisi_ptt_filter_desc - Descriptor of the PTT trace filter
* @list: entry of this descriptor in the filter list
* @is_port: the PCI device of the filter is a Root Port or not
* @devid: the PCI device's devid of the filter
*/
struct hisi_ptt_filter_desc {
struct list_head list;
bool is_port;
u16 devid;
};
/**
* struct hisi_ptt_pmu_buf - Descriptor of the AUX buffer of PTT trace
* @length: size of the AUX buffer
* @nr_pages: number of pages of the AUX buffer
* @base: start address of AUX buffer
* @pos: position in the AUX buffer to commit traced data
*/
struct hisi_ptt_pmu_buf {
size_t length;
int nr_pages;
void *base;
long pos;
};
/**
* struct hisi_ptt - Per PTT device data
* @trace_ctrl: the control information of PTT trace
* @hotplug_node: node for register cpu hotplug event
* @hisi_ptt_pmu: the pum device of trace
* @iobase: base IO address of the device
* @pdev: pci_dev of this PTT device
* @tune_lock: lock to serialize the tune process
* @pmu_lock: lock to serialize the perf process
* @upper_bdf: the upper BDF range of the PCI devices managed by this PTT device
* @lower_bdf: the lower BDF range of the PCI devices managed by this PTT device
* @port_filters: the filter list of root ports
* @req_filters: the filter list of requester ID
* @port_mask: port mask of the managed root ports
*/
struct hisi_ptt {
struct hisi_ptt_trace_ctrl trace_ctrl;
struct hlist_node hotplug_node;
struct pmu hisi_ptt_pmu;
void __iomem *iobase;
struct pci_dev *pdev;
struct mutex tune_lock;
spinlock_t pmu_lock;
u32 upper_bdf;
u32 lower_bdf;
/*
* The trace TLP headers can either be filtered by certain
* root port, or by the requester ID. Organize the filters
* by @port_filters and @req_filters here. The mask of all
* the valid ports is also cached for doing sanity check
* of user input.
*/
struct list_head port_filters;
struct list_head req_filters;
u16 port_mask;
};
#define to_hisi_ptt(pmu) container_of(pmu, struct hisi_ptt, hisi_ptt_pmu)
#endif /* _HISI_PTT_H */
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
View file @ 8be7dfc6
......@@ -2817,6 +2817,26 @@ static int arm_smmu_dev_disable_feature(struct device *dev,
}
}
/*
* HiSilicon PCIe tune and trace device can be used to trace TLP headers on the
* PCIe link and save the data to memory by DMA. The hardware is restricted to
* use identity mapping only.
*/
#define IS_HISI_PTT_DEVICE(pdev) ((pdev)->vendor == PCI_VENDOR_ID_HUAWEI && \
(pdev)->device == 0xa12e)
static int arm_smmu_def_domain_type(struct device *dev)
{
if (dev_is_pci(dev)) {
struct pci_dev *pdev = to_pci_dev(dev);
if (IS_HISI_PTT_DEVICE(pdev))
return IOMMU_DOMAIN_IDENTITY;
}
return 0;
}
static struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
.domain_alloc = arm_smmu_domain_alloc,
......@@ -2831,6 +2851,7 @@ static struct iommu_ops arm_smmu_ops = {
.sva_unbind = arm_smmu_sva_unbind,
.sva_get_pasid = arm_smmu_sva_get_pasid,
.page_response = arm_smmu_page_response,
.def_domain_type = arm_smmu_def_domain_type,
.pgsize_bitmap = -1UL, /* Restricted during device attach */
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
......
include/linux/coresight.h
View file @ 8be7dfc6
......@@ -372,6 +372,29 @@ static inline u32 csdev_access_relaxed_read32(struct csdev_access *csa,
return csa->read(offset, true, false);
}
static inline u64 csdev_access_relaxed_read_pair(struct csdev_access *csa,
u32 lo_offset, u32 hi_offset)
{
if (likely(csa->io_mem)) {
return readl_relaxed(csa->base + lo_offset) |
((u64)readl_relaxed(csa->base + hi_offset) << 32);
}
return csa->read(lo_offset, true, false) | (csa->read(hi_offset, true, false) << 32);
}
static inline void csdev_access_relaxed_write_pair(struct csdev_access *csa, u64 val,
u32 lo_offset, u32 hi_offset)
{
if (likely(csa->io_mem)) {
writel_relaxed((u32)val, csa->base + lo_offset);
writel_relaxed((u32)(val >> 32), csa->base + hi_offset);
} else {
csa->write((u32)val, lo_offset, true, false);
csa->write((u32)(val >> 32), hi_offset, true, false);
}
}
static inline u32 csdev_access_read32(struct csdev_access *csa, u32 offset)
{
if (likely(csa->io_mem))
......
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