greybus-dev

greybus-dev@lists.linaro.org

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593 discussions

[PATCH] staging: greybus: fix a possible data-inconsistency due to data race in get_serial_info()

by Tuo Li

The variables gb_tty->port.close_delay and gb_tty->port.closing_wait are ofter accessed together while holding the lock gb_tty->port.mutex. Here is an example in set_serial_info(): mutex_lock(&gb_tty->port.mutex); ... gb_tty->port.close_delay = close_delay; gb_tty->port.closing_wait = closing_wait; ... mutex_unlock(&gb_tty->port.mutex); However, they are accessed without holding the lock gb_tty->port.mutex when are accessed in get_serial_info(): ss->close_delay = jiffies_to_msecs(gb_tty->port.close_delay) / 10; ss->closing_wait = gb_tty->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? ASYNC_CLOSING_WAIT_NONE : jiffies_to_msecs(gb_tty->port.closing_wait) / 10; In my opinion, this may be a harmful race, because ss->close_delay can be inconsistent with ss->closing_wait if gb_tty->port.close_delay and gb_tty->port.closing_wait are updated by another thread after the assignment to ss->close_delay. Besides, the select operator may return wrong value if gb_tty->port.closing_wait is updated right after the condition is calculated. To fix this possible data-inconsistency caused by data race, a lock and unlock pair is added when accessing different fields of gb_tty->port. Reported-by: BassCheck <bass(a)buaa.edu.cn> Signed-off-by: Tuo Li <islituo(a)gmail.com> --- drivers/staging/greybus/uart.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 20a34599859f..b8875517ea6a 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -596,12 +596,14 @@ static int get_serial_info(struct tty_struct *tty, { struct gb_tty *gb_tty = tty->driver_data; + mutex_lock(&gb_tty->port.mutex); ss->line = gb_tty->minor; ss->close_delay = jiffies_to_msecs(gb_tty->port.close_delay) / 10; ss->closing_wait = gb_tty->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? ASYNC_CLOSING_WAIT_NONE : jiffies_to_msecs(gb_tty->port.closing_wait) / 10; + mutex_unlock(&gb_tty->port.mutex); return 0; } -- 2.34.1

2 years, 2 months

[PATCH 02/22] greybus: Use alloc_ordered_workqueue() to create ordered workqueues

by Tejun Heo

BACKGROUND ========== When multiple work items are queued to a workqueue, their execution order doesn't match the queueing order. They may get executed in any order and simultaneously. When fully serialized execution - one by one in the queueing order - is needed, an ordered workqueue should be used which can be created with alloc_ordered_workqueue(). However, alloc_ordered_workqueue() was a later addition. Before it, an ordered workqueue could be obtained by creating an UNBOUND workqueue with @max_active==1. This originally was an implementation side-effect which was broken by 4c16bd327c74 ("workqueue: restore WQ_UNBOUND/max_active==1 to be ordered"). Because there were users that depended on the ordered execution, 5c0338c68706 ("workqueue: restore WQ_UNBOUND/max_active==1 to be ordered") made workqueue allocation path to implicitly promote UNBOUND workqueues w/ @max_active==1 to ordered workqueues. While this has worked okay, overloading the UNBOUND allocation interface this way creates other issues. It's difficult to tell whether a given workqueue actually needs to be ordered and users that legitimately want a min concurrency level wq unexpectedly gets an ordered one instead. With planned UNBOUND workqueue updates to improve execution locality and more prevalence of chiplet designs which can benefit from such improvements, this isn't a state we wanna be in forever. This patch series audits all callsites that create an UNBOUND workqueue w/ @max_active==1 and converts them to alloc_ordered_workqueue() as necessary. WHAT TO LOOK FOR ================ The conversions are from alloc_workqueue(WQ_UNBOUND | flags, 1, args..) to alloc_ordered_workqueue(flags, args...) which don't cause any functional changes. If you know that fully ordered execution is not ncessary, please let me know. I'll drop the conversion and instead add a comment noting the fact to reduce confusion while conversion is in progress. If you aren't fully sure, it's completely fine to let the conversion through. The behavior will stay exactly the same and we can always reconsider later. As there are follow-up workqueue core changes, I'd really appreciate if the patch can be routed through the workqueue tree w/ your acks. Thanks. Signed-off-by: Tejun Heo <tj(a)kernel.org> Cc: Johan Hovold <johan(a)kernel.org> Cc: Alex Elder <elder(a)kernel.org> Cc: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Cc: greybus-dev(a)lists.linaro.org --- drivers/greybus/connection.c | 4 ++-- drivers/greybus/svc.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/greybus/connection.c b/drivers/greybus/connection.c index e3799a53a193..9c88861986c8 100644 --- a/drivers/greybus/connection.c +++ b/drivers/greybus/connection.c @@ -187,8 +187,8 @@ _gb_connection_create(struct gb_host_device *hd, int hd_cport_id, spin_lock_init(&connection->lock); INIT_LIST_HEAD(&connection->operations); - connection->wq = alloc_workqueue("%s:%d", WQ_UNBOUND, 1, - dev_name(&hd->dev), hd_cport_id); + connection->wq = alloc_ordered_workqueue("%s:%d", 0, dev_name(&hd->dev), + hd_cport_id); if (!connection->wq) { ret = -ENOMEM; goto err_free_connection; diff --git a/drivers/greybus/svc.c b/drivers/greybus/svc.c index 16cced80867a..0d7e749174a4 100644 --- a/drivers/greybus/svc.c +++ b/drivers/greybus/svc.c @@ -1318,7 +1318,7 @@ struct gb_svc *gb_svc_create(struct gb_host_device *hd) if (!svc) return NULL; - svc->wq = alloc_workqueue("%s:svc", WQ_UNBOUND, 1, dev_name(&hd->dev)); + svc->wq = alloc_ordered_workqueue("%s:svc", 0, dev_name(&hd->dev)); if (!svc->wq) { kfree(svc); return NULL; -- 2.40.0

2 years, 4 months

[PATCH] drivers: staging: greybus: fix GPF issue in gb_camera_capture

by Dongliang Mu

In gb_camera_capture(), it does not check the value of settings before dereferencing it. And gb_camera_debugfs_capture calls gb_camera_capture with the 6th parameter settings as NULL. Fix this by checking the value of setting at the starting of gb_camera_capture. Fixes: 3265edaf0d70 ("greybus: Add driver for the camera class protocol") Signed-off-by: Dongliang Mu <dzm91(a)hust.edu.cn> --- drivers/staging/greybus/camera.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/camera.c b/drivers/staging/greybus/camera.c index cdbb42cd413b..5a4b26e7f645 100644 --- a/drivers/staging/greybus/camera.c +++ b/drivers/staging/greybus/camera.c @@ -659,7 +659,7 @@ static int gb_camera_capture(struct gb_camera *gcam, u32 request_id, size_t req_size; int ret; - if (settings_size > GB_CAMERA_MAX_SETTINGS_SIZE) + if (settings_size > GB_CAMERA_MAX_SETTINGS_SIZE || !settings) return -EINVAL; req_size = sizeof(*req) + settings_size; -- 2.39.2

2 years, 4 months

[PATCH 0/2] improve arche_platform_wd_irq() function

by Khadija Kamran

Improve arche_platform_wd_irq() function to minimize indentation and fix checkpatch issues. Khadija Kamran (2): staging: greybus: add a single exit path to arche_platform_wd_irq() staging: greybus: refactor arche_platform_wd_irq() drivers/staging/greybus/arche-platform.c | 84 ++++++++++++------------ 1 file changed, 43 insertions(+), 41 deletions(-) -- 2.34.1

2 years, 4 months

Multiple undefined configuration options are dependent in Kconfig under the v6.3-rc4 drivers directory

by 孙滢

It has been discovered that the following configuration options are undefined in the current latest version, v6.3-rc4, yet they are being relied upon by other configuration options in multiple Kconfig files: MIPS_BAIKAL_T1 is undefined, used as a 'depends on' condition in multiple files such as drivers/ata/Kconfig, drivers/hwmon/Kconfig, drivers/bus/Kconfig, and drivers/memory/Kconfig. MFD_MAX597X is undefined, used as a 'depends on' condition in Kconfig file drivers/regulator/Kconfig. MFD_SM5703 is undefined, used as a 'depends on' condition in Kconfig file drivers/regulator/Kconfig. ARCH_THUNDERBAY is undefined, used as a 'depends on' condition in Kconfig files drivers/pinctrl/Kconfig and drivers/phy/intel/Kconfig. ARCH_BCM4908 is undefined, used as a 'depends on' condition in Kconfig file drivers/leds/blink/Kconfig. MFD_TN48M_CPLD is undefined, used as a 'depends on' condition in Kconfig files drivers/gpio/Kconfig and drivers/reset/Kconfig. USB_HSIC_USB3613 is undefined, used as a 'depends on' condition in drivers/staging/greybus/Kconfig and drivers/staging/greybus/arche-platform.c. If these 7 configuration options are deprecated, it is recommended to remove the dependencies on them in the Kconfig files. If they are still useful, it is recommended to define them. Best regards, Ying Sun Pengpeng Hou Yanjie Ren

2 years, 5 months

[PATCH] staging: greybus: drop loopback test files

by Greg Kroah-Hartman

The greybus loopback test tool does not belong burried down in a driver-specific directory. If it is needed, it should be somewhere else, like in the testing directory. But as the loopback driver is probably never going to be merged out of the staging directory, let's just delete the test alltogether for now. If it's needed in the future, it can be brought back with a revert. Also, having an Android.mk file in the kernel source tree breaks some Android build systems when trying to build from a read-only source tree, the report of which prompted this being a good reason to remove it as well. Cc: Johan Hovold <johan(a)kernel.org> Cc: Alex Elder <elder(a)kernel.org> Cc: Jack Schofield <schofija(a)oregonstate.edu> Cc: Vaibhav Nagare <vnagare(a)redhat.com> Cc: greybus-dev(a)lists.linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/staging/greybus/tools/.gitignore | 2 - drivers/staging/greybus/tools/Android.mk | 10 - drivers/staging/greybus/tools/Makefile | 33 - drivers/staging/greybus/tools/README.loopback | 198 ---- drivers/staging/greybus/tools/lbtest | 169 --- drivers/staging/greybus/tools/loopback_test.c | 979 ------------------ 6 files changed, 1391 deletions(-) delete mode 100644 drivers/staging/greybus/tools/.gitignore delete mode 100644 drivers/staging/greybus/tools/Android.mk delete mode 100644 drivers/staging/greybus/tools/Makefile delete mode 100644 drivers/staging/greybus/tools/README.loopback delete mode 100755 drivers/staging/greybus/tools/lbtest delete mode 100644 drivers/staging/greybus/tools/loopback_test.c diff --git a/drivers/staging/greybus/tools/.gitignore b/drivers/staging/greybus/tools/.gitignore deleted file mode 100644 index 1fd364aba774..000000000000 --- a/drivers/staging/greybus/tools/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only -loopback_test diff --git a/drivers/staging/greybus/tools/Android.mk b/drivers/staging/greybus/tools/Android.mk deleted file mode 100644 index fdadbf611757..000000000000 --- a/drivers/staging/greybus/tools/Android.mk +++ /dev/null @@ -1,10 +0,0 @@ -LOCAL_PATH:= $(call my-dir) - -include $(CLEAR_VARS) - -LOCAL_SRC_FILES:= loopback_test.c -LOCAL_MODULE_TAGS := optional -LOCAL_MODULE := gb_loopback_test - -include $(BUILD_EXECUTABLE) - diff --git a/drivers/staging/greybus/tools/Makefile b/drivers/staging/greybus/tools/Makefile deleted file mode 100644 index a3bbd73171f2..000000000000 --- a/drivers/staging/greybus/tools/Makefile +++ /dev/null @@ -1,33 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -ifeq ($(strip $(V)), 1) - Q = -else - Q = @ -endif - -CFLAGS += -std=gnu99 -Wall -Wextra -g \ - -D_GNU_SOURCE \ - -Wno-unused-parameter \ - -Wmaybe-uninitialized \ - -Wredundant-decls \ - -Wcast-align \ - -Wsign-compare \ - -Wno-missing-field-initializers \ - -Wno-shift-negative-value - -CC := $(CROSS_COMPILE)gcc - -TOOLS = loopback_test - -all: $(TOOLS) - -%.o: %.c ../greybus_protocols.h - @echo ' TARGET_CC $@' - $(Q)$(CC) $(CFLAGS) -c $< -o $@ - -loopback_%: loopback_%.o - @echo ' TARGET_LD $@' - $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $^ -o $@ - -clean:: - rm -f *.o $(TOOLS) diff --git a/drivers/staging/greybus/tools/README.loopback b/drivers/staging/greybus/tools/README.loopback deleted file mode 100644 index 070a510cbe7c..000000000000 --- a/drivers/staging/greybus/tools/README.loopback +++ /dev/null @@ -1,198 +0,0 @@ - - - 1 - LOOPBACK DRIVER - -The driver implements the main logic of the loopback test and provides -sysfs files to configure the test and retrieve the results. -A user could run a test without the need of the test application given -that he understands the sysfs interface of the loopback driver. - -The loopback kernel driver needs to be loaded and at least one module -with the loopback feature enabled must be present for the sysfs files to be -created and for the loopback test application to be able to run. - -To load the module: -# modprobe gb-loopback - - -When the module is probed, New files are available on the sysfs -directory of the detected loopback device. -(typically under "/sys/bus/graybus/devices"). - -Here is a short summary of the sysfs interface files that should be visible: - -* Loopback Configuration Files: - async - Use asynchronous operations. - iteration_max - Number of tests iterations to perform. - size - payload size of the transfer. - timeout - The number of microseconds to give an individual - asynchronous request before timing out. - us_wait - Time to wait between 2 messages - type - By writing the test type to this file, the test starts. - Valid tests are: - 0 stop the test - 2 - ping - 3 - transfer - 4 - sink - -* Loopback feedback files: - error - number of errors that have occurred. - iteration_count - Number of iterations performed. - requests_completed - Number of requests successfully completed. - requests_timedout - Number of requests that have timed out. - timeout_max - Max allowed timeout - timeout_min - Min allowed timeout. - -* Loopback result files: - apbridge_unipro_latency_avg - apbridge_unipro_latency_max - apbridge_unipro_latency_min - gpbridge_firmware_latency_avg - gpbridge_firmware_latency_max - gpbridge_firmware_latency_min - requests_per_second_avg - requests_per_second_max - requests_per_second_min - latency_avg - latency_max - latency_min - throughput_avg - throughput_max - throughput_min - - - - 2 - LOOPBACK TEST APPLICATION - -The loopback test application manages and formats the results provided by -the loopback kernel module. The purpose of this application -is to: - - Start and manage multiple loopback device tests concurrently. - - Calculate the aggregate results for multiple devices. - - Gather and format test results (csv or human readable). - -The best way to get up to date usage information for the application is -usually to pass the "-h" parameter. -Here is the summary of the available options: - - Mandatory arguments - -t must be one of the test names - sink, transfer or ping - -i iteration count - the number of iterations to run the test over - Optional arguments - -S sysfs location - location for greybus 'endo' entries default /sys/bus/greybus/devices/ - -D debugfs location - location for loopback debugfs entries default /sys/kernel/debug/gb_loopback/ - -s size of data packet to send during test - defaults to zero - -m mask - a bit mask of connections to include example: -m 8 = 4th connection -m 9 = 1st and 4th connection etc - default is zero which means broadcast to all connections - -v verbose output - -d debug output - -r raw data output - when specified the full list of latency values are included in the output CSV - -p porcelain - when specified printout is in a user-friendly non-CSV format. This option suppresses writing to CSV file - -a aggregate - show aggregation of all enabled devies - -l list found loopback devices and exit. - -x Async - Enable async transfers. - -o Timeout - Timeout in microseconds for async operations. - - - - 3 - REAL WORLD EXAMPLE USAGES - - 3.1 - Using the driver sysfs files to run a test on a single device: - -* Run a 1000 transfers of a 100 byte packet. Each transfer is started only -after the previous one finished successfully: - echo 0 > /sys/bus/greybus/devices/1-2.17/type - echo 0 > /sys/bus/greybus/devices/1-2.17/async - echo 2000 > /sys/bus/greybus/devices/1-2.17/us_wait - echo 100 > /sys/bus/greybus/devices/1-2.17/size - echo 1000 > /sys/bus/greybus/devices/1-2.17/iteration_max - echo 0 > /sys/bus/greybus/devices/1-2.17/mask - echo 200000 > /sys/bus/greybus/devices/1-2.17/timeout - echo 3 > /sys/bus/greybus/devices/1-2.17/type - -* Run a 1000 transfers of a 100 byte packet. Transfers are started without -waiting for the previous one to finish: - echo 0 > /sys/bus/greybus/devices/1-2.17/type - echo 3 > /sys/bus/greybus/devices/1-2.17/async - echo 0 > /sys/bus/greybus/devices/1-2.17/us_wait - echo 100 > /sys/bus/greybus/devices/1-2.17/size - echo 1000 > /sys/bus/greybus/devices/1-2.17/iteration_max - echo 0 > /sys/bus/greybus/devices/1-2.17/mask - echo 200000 > /sys/bus/greybus/devices/1-2.17/timeout - echo 3 > /sys/bus/greybus/devices/1-2.17/type - -* Read the results from sysfs: - cat /sys/bus/greybus/devices/1-2.17/requests_per_second_min - cat /sys/bus/greybus/devices/1-2.17/requests_per_second_max - cat /sys/bus/greybus/devices/1-2.17/requests_per_second_avg - - cat /sys/bus/greybus/devices/1-2.17/latency_min - cat /sys/bus/greybus/devices/1-2.17/latency_max - cat /sys/bus/greybus/devices/1-2.17/latency_avg - - cat /sys/bus/greybus/devices/1-2.17/apbridge_unipro_latency_min - cat /sys/bus/greybus/devices/1-2.17/apbridge_unipro_latency_max - cat /sys/bus/greybus/devices/1-2.17/apbridge_unipro_latency_avg - - cat /sys/bus/greybus/devices/1-2.17/gpbridge_firmware_latency_min - cat /sys/bus/greybus/devices/1-2.17/gpbridge_firmware_latency_max - cat /sys/bus/greybus/devices/1-2.17/gpbridge_firmware_latency_avg - - cat /sys/bus/greybus/devices/1-2.17/error - cat /sys/bus/greybus/devices/1-2.17/requests_completed - cat /sys/bus/greybus/devices/1-2.17/requests_timedout - - -3.2 - using the test application: - -* Run a transfer test 10 iterations of size 100 bytes on all available devices - #/loopback_test -t transfer -i 10 -s 100 - 1970-1-1 0:10:7,transfer,1-4.17,100,10,0,443,509,471.700012,66,1963,2256,2124.600098,293,102776,118088,109318.898438,15312,1620,1998,1894.099976,378,56,57,56.799999,1 - 1970-1-1 0:10:7,transfer,1-5.17,100,10,0,399,542,463.399994,143,1845,2505,2175.800049,660,92568,125744,107393.296875,33176,1469,2305,1806.500000,836,56,57,56.799999,1 - - -* Show the aggregate results of both devices. ("-a") - #/loopback_test -t transfer -i 10 -s 100 -a - 1970-1-1 0:10:35,transfer,1-4.17,100,10,0,448,580,494.100006,132,1722,2230,2039.400024,508,103936,134560,114515.703125,30624,1513,1980,1806.900024,467,56,57,57.299999,1 - 1970-1-1 0:10:35,transfer,1-5.17,100,10,0,383,558,478.600006,175,1791,2606,2115.199951,815,88856,129456,110919.703125,40600,1457,2246,1773.599976,789,56,57,57.099998,1 - 1970-1-1 0:10:35,transfer,aggregate,100,10,0,383,580,486.000000,197,1722,2606,2077.000000,884,88856,134560,112717.000000,45704,1457,2246,1789.000000,789,56,57,57.000000,1 - -* Example usage of the mask option to select which devices will - run the test (1st, 2nd, or both devices): - # /loopback_test -t transfer -i 10 -s 100 -m 1 - 1970-1-1 0:11:56,transfer,1-4.17,100,10,0,514,558,544.900024,44,1791,1943,1836.599976,152,119248,129456,126301.296875,10208,1600,1001609,101613.601562,1000009,56,57,56.900002,1 - # /loopback_test -t transfer -i 10 -s 100 -m 2 - 1970-1-1 0:12:0,transfer,1-5.17,100,10,0,468,554,539.000000,86,1804,2134,1859.500000,330,108576,128528,124932.500000,19952,1606,1626,1619.300049,20,56,57,57.400002,1 - # /loopback_test -t transfer -i 10 -s 100 -m 3 - 1970-1-1 0:12:3,transfer,1-4.17,100,10,0,432,510,469.399994,78,1959,2313,2135.800049,354,100224,118320,108785.296875,18096,1610,2024,1893.500000,414,56,57,57.200001,1 - 1970-1-1 0:12:3,transfer,1-5.17,100,10,0,404,542,468.799988,138,1843,2472,2152.500000,629,93728,125744,108646.101562,32016,1504,2247,1853.099976,743,56,57,57.099998,1 - -* Show output in human readable format ("-p") - # /loopback_test -t transfer -i 10 -s 100 -m 3 -p - - 1970-1-1 0:12:37 - test: transfer - path: 1-4.17 - size: 100 - iterations: 10 - errors: 0 - async: Disabled - requests per-sec: min=390, max=547, average=469.299988, jitter=157 - ap-throughput B/s: min=90480 max=126904 average=108762.101562 jitter=36424 - ap-latency usec: min=1826 max=2560 average=2146.000000 jitter=734 - apbridge-latency usec: min=1620 max=1982 average=1882.099976 jitter=362 - gpbridge-latency usec: min=56 max=57 average=57.099998 jitter=1 - - - 1970-1-1 0:12:37 - test: transfer - path: 1-5.17 - size: 100 - iterations: 10 - errors: 0 - async: Disabled - requests per-sec: min=397, max=538, average=461.700012, jitter=141 - ap-throughput B/s: min=92104 max=124816 average=106998.898438 jitter=32712 - ap-latency usec: min=1856 max=2514 average=2185.699951 jitter=658 - apbridge-latency usec: min=1460 max=2296 average=1828.599976 jitter=836 - gpbridge-latency usec: min=56 max=57 average=57.099998 jitter=1 diff --git a/drivers/staging/greybus/tools/lbtest b/drivers/staging/greybus/tools/lbtest deleted file mode 100755 index 47c481239e98..000000000000 --- a/drivers/staging/greybus/tools/lbtest +++ /dev/null @@ -1,169 +0,0 @@ -#!/usr/bin/env python -# SPDX-License-Identifier: BSD-3-Clause - -# Copyright (c) 2015 Google, Inc. -# Copyright (c) 2015 Linaro, Ltd. -# All rights reserved. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# 1. Redistributions of source code must retain the above copyright notice, -# this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright notice, -# this list of conditions and the following disclaimer in the documentation -# and/or other materials provided with the distribution. -# 3. Neither the name of the copyright holder nor the names of its -# contributors may be used to endorse or promote products derived from this -# software without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, -# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR -# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; -# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, -# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR -# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF -# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -from __future__ import print_function -import csv -import datetime -import sys -import time - -dict = {'ping': '2', 'transfer': '3', 'sink': '4'} -verbose = 1 - -def abort(): - sys.exit(1) - -def usage(): - print('Usage: looptest TEST SIZE ITERATIONS PATH\n\n' - ' Run TEST for a number of ITERATIONS with operation data SIZE bytes\n' - ' TEST may be \'ping\' \'transfer\' or \'sink\'\n' - ' SIZE indicates the size of transfer <= greybus max payload bytes\n' - ' ITERATIONS indicates the number of times to execute TEST at SIZE bytes\n' - ' Note if ITERATIONS is set to zero then this utility will\n' - ' initiate an infinite (non terminating) test and exit\n' - ' without logging any metrics data\n' - ' PATH indicates the sysfs path for the loopback greybus entries e.g.\n' - ' /sys/bus/greybus/devices/endo0:1:1:1:1/\n' - 'Examples:\n' - ' looptest transfer 128 10000\n' - ' looptest ping 0 128\n' - ' looptest sink 2030 32768\n' - .format(sys.argv[0]), file=sys.stderr) - - abort() - -def read_sysfs_int(path): - try: - f = open(path, "r"); - val = f.read(); - f.close() - return int(val) - except IOError as e: - print("I/O error({0}): {1}".format(e.errno, e.strerror)) - print("Invalid path %s" % path) - -def write_sysfs_val(path, val): - try: - f = open(path, "r+") - f.write(val) - f.close() - except IOError as e: - print("I/O error({0}): {1}".format(e.errno, e.strerror)) - print("Invalid path %s" % path) - -def log_csv(test_name, size, iteration_max, sys_pfx): - # file name will test_name_size_iteration_max.csv - # every time the same test with the same parameters is run we will then - # append to the same CSV with datestamp - representing each test dataset - fname = test_name + '_' + size + '_' + str(iteration_max) + '.csv' - - try: - # gather data set - date = str(datetime.datetime.now()) - error = read_sysfs_int(sys_pfx + 'error') - request_min = read_sysfs_int(sys_pfx + 'requests_per_second_min') - request_max = read_sysfs_int(sys_pfx + 'requests_per_second_max') - request_avg = read_sysfs_int(sys_pfx + 'requests_per_second_avg') - latency_min = read_sysfs_int(sys_pfx + 'latency_min') - latency_max = read_sysfs_int(sys_pfx + 'latency_max') - latency_avg = read_sysfs_int(sys_pfx + 'latency_avg') - throughput_min = read_sysfs_int(sys_pfx + 'throughput_min') - throughput_max = read_sysfs_int(sys_pfx + 'throughput_max') - throughput_avg = read_sysfs_int(sys_pfx + 'throughput_avg') - - # derive jitter - request_jitter = request_max - request_min - latency_jitter = latency_max - latency_min - throughput_jitter = throughput_max - throughput_min - - # append data set to file - with open(fname, 'a') as csvf: - row = csv.writer(csvf, delimiter=",", quotechar="'", - quoting=csv.QUOTE_MINIMAL) - row.writerow([date, test_name, size, iteration_max, error, - request_min, request_max, request_avg, request_jitter, - latency_min, latency_max, latency_avg, latency_jitter, - throughput_min, throughput_max, throughput_avg, throughput_jitter]) - except IOError as e: - print("I/O error({0}): {1}".format(e.errno, e.strerror)) - -def loopback_run(test_name, size, iteration_max, sys_pfx): - test_id = dict[test_name] - try: - # Terminate any currently running test - write_sysfs_val(sys_pfx + 'type', '0') - # Set parameter for no wait between messages - write_sysfs_val(sys_pfx + 'ms_wait', '0') - # Set operation size - write_sysfs_val(sys_pfx + 'size', size) - # Set iterations - write_sysfs_val(sys_pfx + 'iteration_max', str(iteration_max)) - # Initiate by setting loopback operation type - write_sysfs_val(sys_pfx + 'type', test_id) - time.sleep(1) - - if iteration_max == 0: - print ("Infinite test initiated CSV won't be logged\n") - return - - previous = 0 - err = 0 - while True: - # get current count bail out if it hasn't changed - iteration_count = read_sysfs_int(sys_pfx + 'iteration_count') - if previous == iteration_count: - err = 1 - break - elif iteration_count == iteration_max: - break - previous = iteration_count - if verbose: - print('%02d%% complete %d of %d ' % - (100 * iteration_count / iteration_max, - iteration_count, iteration_max)) - time.sleep(1) - if err: - print ('\nError executing test\n') - else: - log_csv(test_name, size, iteration_max, sys_pfx) - except ValueError as ve: - print("Error: %s " % format(e.strerror), file=sys.stderr) - abort() - -def main(): - if len(sys.argv) < 5: - usage() - - if sys.argv[1] in dict.keys(): - loopback_run(sys.argv[1], sys.argv[2], int(sys.argv[3]), sys.argv[4]) - else: - usage() -if __name__ == '__main__': - main() diff --git a/drivers/staging/greybus/tools/loopback_test.c b/drivers/staging/greybus/tools/loopback_test.c deleted file mode 100644 index d7ad51ff60c5..000000000000 --- a/drivers/staging/greybus/tools/loopback_test.c +++ /dev/null @@ -1,979 +0,0 @@ -// SPDX-License-Identifier: BSD-3-Clause -/* - * Loopback test application - * - * Copyright 2015 Google Inc. - * Copyright 2015 Linaro Ltd. - */ -#include <errno.h> -#include <fcntl.h> -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <stdint.h> -#include <poll.h> -#include <sys/types.h> -#include <time.h> -#include <unistd.h> -#include <dirent.h> -#include <signal.h> - -#define MAX_NUM_DEVICES 10 -#define MAX_SYSFS_PREFIX 0x80 -#define MAX_SYSFS_PATH 0x200 -#define CSV_MAX_LINE 0x1000 -#define SYSFS_MAX_INT 0x20 -#define MAX_STR_LEN 255 -#define DEFAULT_ASYNC_TIMEOUT 200000 - -struct dict { - char *name; - int type; -}; - -static struct dict dict[] = { - {"ping", 2}, - {"transfer", 3}, - {"sink", 4}, - {NULL,} /* list termination */ -}; - -struct loopback_results { - float latency_avg; - uint32_t latency_max; - uint32_t latency_min; - uint32_t latency_jitter; - - float request_avg; - uint32_t request_max; - uint32_t request_min; - uint32_t request_jitter; - - float throughput_avg; - uint32_t throughput_max; - uint32_t throughput_min; - uint32_t throughput_jitter; - - float apbridge_unipro_latency_avg; - uint32_t apbridge_unipro_latency_max; - uint32_t apbridge_unipro_latency_min; - uint32_t apbridge_unipro_latency_jitter; - - float gbphy_firmware_latency_avg; - uint32_t gbphy_firmware_latency_max; - uint32_t gbphy_firmware_latency_min; - uint32_t gbphy_firmware_latency_jitter; - - uint32_t error; -}; - -struct loopback_device { - char name[MAX_STR_LEN]; - char sysfs_entry[MAX_SYSFS_PATH]; - char debugfs_entry[MAX_SYSFS_PATH]; - struct loopback_results results; -}; - -struct loopback_test { - int verbose; - int debug; - int raw_data_dump; - int porcelain; - int mask; - int size; - int iteration_max; - int aggregate_output; - int test_id; - int device_count; - int list_devices; - int use_async; - int async_timeout; - int async_outstanding_operations; - int us_wait; - int file_output; - int stop_all; - int poll_count; - char test_name[MAX_STR_LEN]; - char sysfs_prefix[MAX_SYSFS_PREFIX]; - char debugfs_prefix[MAX_SYSFS_PREFIX]; - struct timespec poll_timeout; - struct loopback_device devices[MAX_NUM_DEVICES]; - struct loopback_results aggregate_results; - struct pollfd fds[MAX_NUM_DEVICES]; -}; - -struct loopback_test t; - -/* Helper macros to calculate the aggregate results for all devices */ -static inline int device_enabled(struct loopback_test *t, int dev_idx); - -#define GET_MAX(field) \ -static int get_##field##_aggregate(struct loopback_test *t) \ -{ \ - uint32_t max = 0; \ - int i; \ - for (i = 0; i < t->device_count; i++) { \ - if (!device_enabled(t, i)) \ - continue; \ - if (t->devices[i].results.field > max) \ - max = t->devices[i].results.field; \ - } \ - return max; \ -} \ - -#define GET_MIN(field) \ -static int get_##field##_aggregate(struct loopback_test *t) \ -{ \ - uint32_t min = ~0; \ - int i; \ - for (i = 0; i < t->device_count; i++) { \ - if (!device_enabled(t, i)) \ - continue; \ - if (t->devices[i].results.field < min) \ - min = t->devices[i].results.field; \ - } \ - return min; \ -} \ - -#define GET_AVG(field) \ -static int get_##field##_aggregate(struct loopback_test *t) \ -{ \ - uint32_t val = 0; \ - uint32_t count = 0; \ - int i; \ - for (i = 0; i < t->device_count; i++) { \ - if (!device_enabled(t, i)) \ - continue; \ - count++; \ - val += t->devices[i].results.field; \ - } \ - if (count) \ - val /= count; \ - return val; \ -} \ - -GET_MAX(throughput_max); -GET_MAX(request_max); -GET_MAX(latency_max); -GET_MAX(apbridge_unipro_latency_max); -GET_MAX(gbphy_firmware_latency_max); -GET_MIN(throughput_min); -GET_MIN(request_min); -GET_MIN(latency_min); -GET_MIN(apbridge_unipro_latency_min); -GET_MIN(gbphy_firmware_latency_min); -GET_AVG(throughput_avg); -GET_AVG(request_avg); -GET_AVG(latency_avg); -GET_AVG(apbridge_unipro_latency_avg); -GET_AVG(gbphy_firmware_latency_avg); - -void abort(void) -{ - _exit(1); -} - -void usage(void) -{ - fprintf(stderr, "Usage: loopback_test TEST [SIZE] ITERATIONS [SYSPATH] [DBGPATH]\n\n" - " Run TEST for a number of ITERATIONS with operation data SIZE bytes\n" - " TEST may be \'ping\' \'transfer\' or \'sink\'\n" - " SIZE indicates the size of transfer <= greybus max payload bytes\n" - " ITERATIONS indicates the number of times to execute TEST at SIZE bytes\n" - " Note if ITERATIONS is set to zero then this utility will\n" - " initiate an infinite (non terminating) test and exit\n" - " without logging any metrics data\n" - " SYSPATH indicates the sysfs path for the loopback greybus entries e.g.\n" - " /sys/bus/greybus/devices\n" - " DBGPATH indicates the debugfs path for the loopback greybus entries e.g.\n" - " /sys/kernel/debug/gb_loopback/\n" - " Mandatory arguments\n" - " -t must be one of the test names - sink, transfer or ping\n" - " -i iteration count - the number of iterations to run the test over\n" - " Optional arguments\n" - " -S sysfs location - location for greybus 'endo' entries default /sys/bus/greybus/devices/\n" - " -D debugfs location - location for loopback debugfs entries default /sys/kernel/debug/gb_loopback/\n" - " -s size of data packet to send during test - defaults to zero\n" - " -m mask - a bit mask of connections to include example: -m 8 = 4th connection -m 9 = 1st and 4th connection etc\n" - " default is zero which means broadcast to all connections\n" - " -v verbose output\n" - " -d debug output\n" - " -r raw data output - when specified the full list of latency values are included in the output CSV\n" - " -p porcelain - when specified printout is in a user-friendly non-CSV format. This option suppresses writing to CSV file\n" - " -a aggregate - show aggregation of all enabled devices\n" - " -l list found loopback devices and exit\n" - " -x Async - Enable async transfers\n" - " -o Async Timeout - Timeout in uSec for async operations\n" - " -O Poll loop time out in seconds(max time a test is expected to last, default: 30sec)\n" - " -c Max number of outstanding operations for async operations\n" - " -w Wait in uSec between operations\n" - " -z Enable output to a CSV file (incompatible with -p)\n" - " -f When starting new loopback test, stop currently running tests on all devices\n" - "Examples:\n" - " Send 10000 transfers with a packet size of 128 bytes to all active connections\n" - " loopback_test -t transfer -s 128 -i 10000 -S /sys/bus/greybus/devices/ -D /sys/kernel/debug/gb_loopback/\n" - " loopback_test -t transfer -s 128 -i 10000 -m 0\n" - " Send 10000 transfers with a packet size of 128 bytes to connection 1 and 4\n" - " loopback_test -t transfer -s 128 -i 10000 -m 9\n" - " loopback_test -t ping -s 0 128 -i -S /sys/bus/greybus/devices/ -D /sys/kernel/debug/gb_loopback/\n" - " loopback_test -t sink -s 2030 -i 32768 -S /sys/bus/greybus/devices/ -D /sys/kernel/debug/gb_loopback/\n"); - abort(); -} - -static inline int device_enabled(struct loopback_test *t, int dev_idx) -{ - if (!t->mask || (t->mask & (1 << dev_idx))) - return 1; - - return 0; -} - -static void show_loopback_devices(struct loopback_test *t) -{ - int i; - - if (t->device_count == 0) { - printf("No loopback devices.\n"); - return; - } - - for (i = 0; i < t->device_count; i++) - printf("device[%d] = %s\n", i, t->devices[i].name); -} - -int open_sysfs(const char *sys_pfx, const char *node, int flags) -{ - int fd; - char path[MAX_SYSFS_PATH]; - - snprintf(path, sizeof(path), "%s%s", sys_pfx, node); - fd = open(path, flags); - if (fd < 0) { - fprintf(stderr, "unable to open %s\n", path); - abort(); - } - return fd; -} - -int read_sysfs_int_fd(int fd, const char *sys_pfx, const char *node) -{ - char buf[SYSFS_MAX_INT]; - - if (read(fd, buf, sizeof(buf)) < 0) { - fprintf(stderr, "unable to read from %s%s %s\n", sys_pfx, node, - strerror(errno)); - close(fd); - abort(); - } - return atoi(buf); -} - -float read_sysfs_float_fd(int fd, const char *sys_pfx, const char *node) -{ - char buf[SYSFS_MAX_INT]; - - if (read(fd, buf, sizeof(buf)) < 0) { - fprintf(stderr, "unable to read from %s%s %s\n", sys_pfx, node, - strerror(errno)); - close(fd); - abort(); - } - return atof(buf); -} - -int read_sysfs_int(const char *sys_pfx, const char *node) -{ - int fd, val; - - fd = open_sysfs(sys_pfx, node, O_RDONLY); - val = read_sysfs_int_fd(fd, sys_pfx, node); - close(fd); - return val; -} - -float read_sysfs_float(const char *sys_pfx, const char *node) -{ - int fd; - float val; - - fd = open_sysfs(sys_pfx, node, O_RDONLY); - val = read_sysfs_float_fd(fd, sys_pfx, node); - close(fd); - return val; -} - -void write_sysfs_val(const char *sys_pfx, const char *node, int val) -{ - int fd, len; - char buf[SYSFS_MAX_INT]; - - fd = open_sysfs(sys_pfx, node, O_RDWR); - len = snprintf(buf, sizeof(buf), "%d", val); - if (write(fd, buf, len) < 0) { - fprintf(stderr, "unable to write to %s%s %s\n", sys_pfx, node, - strerror(errno)); - close(fd); - abort(); - } - close(fd); -} - -static int get_results(struct loopback_test *t) -{ - struct loopback_device *d; - struct loopback_results *r; - int i; - - for (i = 0; i < t->device_count; i++) { - if (!device_enabled(t, i)) - continue; - - d = &t->devices[i]; - r = &d->results; - - r->error = read_sysfs_int(d->sysfs_entry, "error"); - r->request_min = read_sysfs_int(d->sysfs_entry, "requests_per_second_min"); - r->request_max = read_sysfs_int(d->sysfs_entry, "requests_per_second_max"); - r->request_avg = read_sysfs_float(d->sysfs_entry, "requests_per_second_avg"); - - r->latency_min = read_sysfs_int(d->sysfs_entry, "latency_min"); - r->latency_max = read_sysfs_int(d->sysfs_entry, "latency_max"); - r->latency_avg = read_sysfs_float(d->sysfs_entry, "latency_avg"); - - r->throughput_min = read_sysfs_int(d->sysfs_entry, "throughput_min"); - r->throughput_max = read_sysfs_int(d->sysfs_entry, "throughput_max"); - r->throughput_avg = read_sysfs_float(d->sysfs_entry, "throughput_avg"); - - r->apbridge_unipro_latency_min = - read_sysfs_int(d->sysfs_entry, "apbridge_unipro_latency_min"); - r->apbridge_unipro_latency_max = - read_sysfs_int(d->sysfs_entry, "apbridge_unipro_latency_max"); - r->apbridge_unipro_latency_avg = - read_sysfs_float(d->sysfs_entry, "apbridge_unipro_latency_avg"); - - r->gbphy_firmware_latency_min = - read_sysfs_int(d->sysfs_entry, "gbphy_firmware_latency_min"); - r->gbphy_firmware_latency_max = - read_sysfs_int(d->sysfs_entry, "gbphy_firmware_latency_max"); - r->gbphy_firmware_latency_avg = - read_sysfs_float(d->sysfs_entry, "gbphy_firmware_latency_avg"); - - r->request_jitter = r->request_max - r->request_min; - r->latency_jitter = r->latency_max - r->latency_min; - r->throughput_jitter = r->throughput_max - r->throughput_min; - r->apbridge_unipro_latency_jitter = - r->apbridge_unipro_latency_max - r->apbridge_unipro_latency_min; - r->gbphy_firmware_latency_jitter = - r->gbphy_firmware_latency_max - r->gbphy_firmware_latency_min; - } - - /*calculate the aggregate results of all enabled devices */ - if (t->aggregate_output) { - r = &t->aggregate_results; - - r->request_min = get_request_min_aggregate(t); - r->request_max = get_request_max_aggregate(t); - r->request_avg = get_request_avg_aggregate(t); - - r->latency_min = get_latency_min_aggregate(t); - r->latency_max = get_latency_max_aggregate(t); - r->latency_avg = get_latency_avg_aggregate(t); - - r->throughput_min = get_throughput_min_aggregate(t); - r->throughput_max = get_throughput_max_aggregate(t); - r->throughput_avg = get_throughput_avg_aggregate(t); - - r->apbridge_unipro_latency_min = - get_apbridge_unipro_latency_min_aggregate(t); - r->apbridge_unipro_latency_max = - get_apbridge_unipro_latency_max_aggregate(t); - r->apbridge_unipro_latency_avg = - get_apbridge_unipro_latency_avg_aggregate(t); - - r->gbphy_firmware_latency_min = - get_gbphy_firmware_latency_min_aggregate(t); - r->gbphy_firmware_latency_max = - get_gbphy_firmware_latency_max_aggregate(t); - r->gbphy_firmware_latency_avg = - get_gbphy_firmware_latency_avg_aggregate(t); - - r->request_jitter = r->request_max - r->request_min; - r->latency_jitter = r->latency_max - r->latency_min; - r->throughput_jitter = r->throughput_max - r->throughput_min; - r->apbridge_unipro_latency_jitter = - r->apbridge_unipro_latency_max - r->apbridge_unipro_latency_min; - r->gbphy_firmware_latency_jitter = - r->gbphy_firmware_latency_max - r->gbphy_firmware_latency_min; - } - - return 0; -} - -int format_output(struct loopback_test *t, - struct loopback_results *r, - const char *dev_name, - char *buf, int buf_len, - struct tm *tm) -{ - int len = 0; - - memset(buf, 0x00, buf_len); - len = snprintf(buf, buf_len, "%u-%u-%u %u:%u:%u", - tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, - tm->tm_hour, tm->tm_min, tm->tm_sec); - - if (t->porcelain) { - len += snprintf(&buf[len], buf_len - len, - "\n test:\t\t\t%s\n path:\t\t\t%s\n size:\t\t\t%u\n iterations:\t\t%u\n errors:\t\t%u\n async:\t\t\t%s\n", - t->test_name, - dev_name, - t->size, - t->iteration_max, - r->error, - t->use_async ? "Enabled" : "Disabled"); - - len += snprintf(&buf[len], buf_len - len, - " requests per-sec:\tmin=%u, max=%u, average=%f, jitter=%u\n", - r->request_min, - r->request_max, - r->request_avg, - r->request_jitter); - - len += snprintf(&buf[len], buf_len - len, - " ap-throughput B/s:\tmin=%u max=%u average=%f jitter=%u\n", - r->throughput_min, - r->throughput_max, - r->throughput_avg, - r->throughput_jitter); - len += snprintf(&buf[len], buf_len - len, - " ap-latency usec:\tmin=%u max=%u average=%f jitter=%u\n", - r->latency_min, - r->latency_max, - r->latency_avg, - r->latency_jitter); - len += snprintf(&buf[len], buf_len - len, - " apbridge-latency usec:\tmin=%u max=%u average=%f jitter=%u\n", - r->apbridge_unipro_latency_min, - r->apbridge_unipro_latency_max, - r->apbridge_unipro_latency_avg, - r->apbridge_unipro_latency_jitter); - - len += snprintf(&buf[len], buf_len - len, - " gbphy-latency usec:\tmin=%u max=%u average=%f jitter=%u\n", - r->gbphy_firmware_latency_min, - r->gbphy_firmware_latency_max, - r->gbphy_firmware_latency_avg, - r->gbphy_firmware_latency_jitter); - - } else { - len += snprintf(&buf[len], buf_len - len, ",%s,%s,%u,%u,%u", - t->test_name, dev_name, t->size, t->iteration_max, - r->error); - - len += snprintf(&buf[len], buf_len - len, ",%u,%u,%f,%u", - r->request_min, - r->request_max, - r->request_avg, - r->request_jitter); - - len += snprintf(&buf[len], buf_len - len, ",%u,%u,%f,%u", - r->latency_min, - r->latency_max, - r->latency_avg, - r->latency_jitter); - - len += snprintf(&buf[len], buf_len - len, ",%u,%u,%f,%u", - r->throughput_min, - r->throughput_max, - r->throughput_avg, - r->throughput_jitter); - - len += snprintf(&buf[len], buf_len - len, ",%u,%u,%f,%u", - r->apbridge_unipro_latency_min, - r->apbridge_unipro_latency_max, - r->apbridge_unipro_latency_avg, - r->apbridge_unipro_latency_jitter); - - len += snprintf(&buf[len], buf_len - len, ",%u,%u,%f,%u", - r->gbphy_firmware_latency_min, - r->gbphy_firmware_latency_max, - r->gbphy_firmware_latency_avg, - r->gbphy_firmware_latency_jitter); - } - - printf("\n%s\n", buf); - - return len; -} - -static int log_results(struct loopback_test *t) -{ - int fd, i, len, ret; - struct tm tm; - time_t local_time; - char file_name[MAX_SYSFS_PATH]; - char data[CSV_MAX_LINE]; - - local_time = time(NULL); - tm = *localtime(&local_time); - - /* - * file name will test_name_size_iteration_max.csv - * every time the same test with the same parameters is run we will then - * append to the same CSV with datestamp - representing each test - * dataset. - */ - if (t->file_output && !t->porcelain) { - snprintf(file_name, sizeof(file_name), "%s_%d_%d.csv", - t->test_name, t->size, t->iteration_max); - - fd = open(file_name, O_WRONLY | O_CREAT | O_APPEND, 0644); - if (fd < 0) { - fprintf(stderr, "unable to open %s for appending\n", file_name); - abort(); - } - } - for (i = 0; i < t->device_count; i++) { - if (!device_enabled(t, i)) - continue; - - len = format_output(t, &t->devices[i].results, - t->devices[i].name, - data, sizeof(data), &tm); - if (t->file_output && !t->porcelain) { - ret = write(fd, data, len); - if (ret == -1) - fprintf(stderr, "unable to write %d bytes to csv.\n", len); - } - } - - if (t->aggregate_output) { - len = format_output(t, &t->aggregate_results, "aggregate", - data, sizeof(data), &tm); - if (t->file_output && !t->porcelain) { - ret = write(fd, data, len); - if (ret == -1) - fprintf(stderr, "unable to write %d bytes to csv.\n", len); - } - } - - if (t->file_output && !t->porcelain) - close(fd); - - return 0; -} - -int is_loopback_device(const char *path, const char *node) -{ - char file[MAX_SYSFS_PATH]; - - snprintf(file, MAX_SYSFS_PATH, "%s%s/iteration_count", path, node); - if (access(file, F_OK) == 0) - return 1; - return 0; -} - -int find_loopback_devices(struct loopback_test *t) -{ - struct dirent **namelist; - int i, n, ret; - unsigned int dev_id; - struct loopback_device *d; - - n = scandir(t->sysfs_prefix, &namelist, NULL, alphasort); - if (n < 0) { - perror("scandir"); - ret = -ENODEV; - goto baddir; - } - - /* Don't include '.' and '..' */ - if (n <= 2) { - ret = -ENOMEM; - goto done; - } - - for (i = 0; i < n; i++) { - ret = sscanf(namelist[i]->d_name, "gb_loopback%u", &dev_id); - if (ret != 1) - continue; - - if (!is_loopback_device(t->sysfs_prefix, namelist[i]->d_name)) - continue; - - if (t->device_count == MAX_NUM_DEVICES) { - fprintf(stderr, "max number of devices reached!\n"); - break; - } - - d = &t->devices[t->device_count++]; - snprintf(d->name, MAX_STR_LEN, "gb_loopback%u", dev_id); - - snprintf(d->sysfs_entry, MAX_SYSFS_PATH, "%s%s/", - t->sysfs_prefix, d->name); - - snprintf(d->debugfs_entry, MAX_SYSFS_PATH, "%sraw_latency_%s", - t->debugfs_prefix, d->name); - - if (t->debug) - printf("add %s %s\n", d->sysfs_entry, d->debugfs_entry); - } - - ret = 0; -done: - for (i = 0; i < n; i++) - free(namelist[i]); - free(namelist); -baddir: - return ret; -} - -static int open_poll_files(struct loopback_test *t) -{ - struct loopback_device *dev; - char buf[MAX_SYSFS_PATH + MAX_STR_LEN]; - char dummy; - int fds_idx = 0; - int i; - - for (i = 0; i < t->device_count; i++) { - dev = &t->devices[i]; - - if (!device_enabled(t, i)) - continue; - - snprintf(buf, sizeof(buf), "%s%s", dev->sysfs_entry, "iteration_count"); - t->fds[fds_idx].fd = open(buf, O_RDONLY); - if (t->fds[fds_idx].fd < 0) { - fprintf(stderr, "Error opening poll file!\n"); - goto err; - } - read(t->fds[fds_idx].fd, &dummy, 1); - t->fds[fds_idx].events = POLLERR | POLLPRI; - t->fds[fds_idx].revents = 0; - fds_idx++; - } - - t->poll_count = fds_idx; - - return 0; - -err: - for (i = 0; i < fds_idx; i++) - close(t->fds[i].fd); - - return -1; -} - -static int close_poll_files(struct loopback_test *t) -{ - int i; - - for (i = 0; i < t->poll_count; i++) - close(t->fds[i].fd); - - return 0; -} -static int is_complete(struct loopback_test *t) -{ - int iteration_count; - int i; - - for (i = 0; i < t->device_count; i++) { - if (!device_enabled(t, i)) - continue; - - iteration_count = read_sysfs_int(t->devices[i].sysfs_entry, - "iteration_count"); - - /* at least one device did not finish yet */ - if (iteration_count != t->iteration_max) - return 0; - } - - return 1; -} - -static void stop_tests(struct loopback_test *t) -{ - int i; - - for (i = 0; i < t->device_count; i++) { - if (!device_enabled(t, i)) - continue; - write_sysfs_val(t->devices[i].sysfs_entry, "type", 0); - } -} - -static void handler(int sig) { /* do nothing */ } - -static int wait_for_complete(struct loopback_test *t) -{ - int number_of_events = 0; - char dummy; - int ret; - int i; - struct timespec *ts = NULL; - struct sigaction sa; - sigset_t mask_old, mask; - - sigemptyset(&mask); - sigemptyset(&mask_old); - sigaddset(&mask, SIGINT); - sigprocmask(SIG_BLOCK, &mask, &mask_old); - - sa.sa_handler = handler; - sa.sa_flags = 0; - sigemptyset(&sa.sa_mask); - if (sigaction(SIGINT, &sa, NULL) == -1) { - fprintf(stderr, "sigaction error\n"); - return -1; - } - - if (t->poll_timeout.tv_sec != 0) - ts = &t->poll_timeout; - - while (1) { - ret = ppoll(t->fds, t->poll_count, ts, &mask_old); - if (ret <= 0) { - stop_tests(t); - fprintf(stderr, "Poll exit with errno %d\n", errno); - return -1; - } - - for (i = 0; i < t->poll_count; i++) { - if (t->fds[i].revents & POLLPRI) { - /* Dummy read to clear the event */ - read(t->fds[i].fd, &dummy, 1); - number_of_events++; - } - } - - if (number_of_events == t->poll_count) - break; - } - - if (!is_complete(t)) { - fprintf(stderr, "Iteration count did not finish!\n"); - return -1; - } - - return 0; -} - -static void prepare_devices(struct loopback_test *t) -{ - int i; - - /* - * Cancel any running tests on enabled devices. If - * stop_all option is given, stop test on all devices. - */ - for (i = 0; i < t->device_count; i++) - if (t->stop_all || device_enabled(t, i)) - write_sysfs_val(t->devices[i].sysfs_entry, "type", 0); - - for (i = 0; i < t->device_count; i++) { - if (!device_enabled(t, i)) - continue; - - write_sysfs_val(t->devices[i].sysfs_entry, "us_wait", - t->us_wait); - - /* Set operation size */ - write_sysfs_val(t->devices[i].sysfs_entry, "size", t->size); - - /* Set iterations */ - write_sysfs_val(t->devices[i].sysfs_entry, "iteration_max", - t->iteration_max); - - if (t->use_async) { - write_sysfs_val(t->devices[i].sysfs_entry, "async", 1); - write_sysfs_val(t->devices[i].sysfs_entry, - "timeout", t->async_timeout); - write_sysfs_val(t->devices[i].sysfs_entry, - "outstanding_operations_max", - t->async_outstanding_operations); - } else { - write_sysfs_val(t->devices[i].sysfs_entry, "async", 0); - } - } -} - -static int start(struct loopback_test *t) -{ - int i; - - /* the test starts by writing test_id to the type file. */ - for (i = 0; i < t->device_count; i++) { - if (!device_enabled(t, i)) - continue; - - write_sysfs_val(t->devices[i].sysfs_entry, "type", t->test_id); - } - - return 0; -} - -void loopback_run(struct loopback_test *t) -{ - int i; - int ret; - - for (i = 0; dict[i].name != NULL; i++) { - if (strstr(dict[i].name, t->test_name)) - t->test_id = dict[i].type; - } - if (!t->test_id) { - fprintf(stderr, "invalid test %s\n", t->test_name); - usage(); - return; - } - - prepare_devices(t); - - ret = open_poll_files(t); - if (ret) - goto err; - - start(t); - - ret = wait_for_complete(t); - close_poll_files(t); - if (ret) - goto err; - - get_results(t); - - log_results(t); - - return; - -err: - printf("Error running test\n"); -} - -static int sanity_check(struct loopback_test *t) -{ - int i; - - if (t->device_count == 0) { - fprintf(stderr, "No loopback devices found\n"); - return -1; - } - - for (i = 0; i < MAX_NUM_DEVICES; i++) { - if (!device_enabled(t, i)) - continue; - - if (t->mask && !strcmp(t->devices[i].name, "")) { - fprintf(stderr, "Bad device mask %x\n", (1 << i)); - return -1; - } - } - - return 0; -} - -int main(int argc, char *argv[]) -{ - int o, ret; - char *sysfs_prefix = "/sys/class/gb_loopback/"; - char *debugfs_prefix = "/sys/kernel/debug/gb_loopback/"; - - memset(&t, 0, sizeof(t)); - - while ((o = getopt(argc, argv, - "t:s:i:S:D:m:v::d::r::p::a::l::x::o:O:c:w:z::f::")) != -1) { - switch (o) { - case 't': - snprintf(t.test_name, MAX_STR_LEN, "%s", optarg); - break; - case 's': - t.size = atoi(optarg); - break; - case 'i': - t.iteration_max = atoi(optarg); - break; - case 'S': - snprintf(t.sysfs_prefix, MAX_SYSFS_PREFIX, "%s", optarg); - break; - case 'D': - snprintf(t.debugfs_prefix, MAX_SYSFS_PREFIX, "%s", optarg); - break; - case 'm': - t.mask = atol(optarg); - break; - case 'v': - t.verbose = 1; - break; - case 'd': - t.debug = 1; - break; - case 'r': - t.raw_data_dump = 1; - break; - case 'p': - t.porcelain = 1; - break; - case 'a': - t.aggregate_output = 1; - break; - case 'l': - t.list_devices = 1; - break; - case 'x': - t.use_async = 1; - break; - case 'o': - t.async_timeout = atoi(optarg); - break; - case 'O': - t.poll_timeout.tv_sec = atoi(optarg); - break; - case 'c': - t.async_outstanding_operations = atoi(optarg); - break; - case 'w': - t.us_wait = atoi(optarg); - break; - case 'z': - t.file_output = 1; - break; - case 'f': - t.stop_all = 1; - break; - default: - usage(); - return -EINVAL; - } - } - - if (!strcmp(t.sysfs_prefix, "")) - snprintf(t.sysfs_prefix, MAX_SYSFS_PREFIX, "%s", sysfs_prefix); - - if (!strcmp(t.debugfs_prefix, "")) - snprintf(t.debugfs_prefix, MAX_SYSFS_PREFIX, "%s", debugfs_prefix); - - ret = find_loopback_devices(&t); - if (ret) - return ret; - ret = sanity_check(&t); - if (ret) - return ret; - - if (t.list_devices) { - show_loopback_devices(&t); - return 0; - } - - if (t.test_name[0] == '\0' || t.iteration_max == 0) - usage(); - - if (t.async_timeout == 0) - t.async_timeout = DEFAULT_ASYNC_TIMEOUT; - - loopback_run(&t); - - return 0; -} -- 2.40.0

2 years, 5 months

[PATCH 00/24] staging: Convert to platform remove callback returning void

by Uwe Kleine-König

Hello, this series adapts the platform drivers below drivers/staging to use the .remove_new() callback. Compared to the traditional .remove() callback .remove_new() returns no value. This is a good thing because the driver core doesn't (and cannot) cope for errors during remove. The only effect of a non-zero return value in .remove() is that the driver core emits a warning. The device is removed anyhow and an early return from .remove() usually yields a resource leak. By changing the remove callback to return void driver authors cannot reasonably assume any more that there is some kind of cleanup later. All drivers in staging already return zero in their remove callback, so they can be trivially converted. The changes to the individual drivers are all orthogonal. If I need to resend some patches because of some review feedback, I'd like to only send the patches that actually needed changes, so please pick up the remaining patches that don't need changing to reduce the amount of mail. Best regards Uwe Uwe Kleine-König (24): staging: axis-fifo: Convert to platform remove callback returning void staging: emxx_udc: Convert to platform remove callback returning void staging: fieldbus: arcx-anybus: Convert to platform remove callback returning void staging: greybus: arche-apb-ctrl: Convert to platform remove callback returning void staging: greybus: arche: Convert to platform remove callback returning void staging: media: atmel-sama5d2-isc: Convert to platform remove callback returning void staging: media: atmel-sama7g5-isc: Convert to platform remove callback returning void staging: media: imx-media-csi: Convert to platform remove callback returning void staging: media: imx-media-dev: Convert to platform remove callback returning void staging: media: imx6-mipi-csi2: Convert to platform remove callback returning void staging: media: imx8mq-mipi-csi2: Convert to platform remove callback returning void staging: media: meson: vdec: Convert to platform remove callback returning void staging: media: omap4iss: Convert to platform remove callback returning void staging: media: rkvdec: Convert to platform remove callback returning void staging: media: sunxi: cedrus: Convert to platform remove callback returning void staging: media: sun6i-isp: Convert to platform remove callback returning void staging: most: dim2: Convert to platform remove callback returning void staging: nvec: Convert to platform remove callback returning void staging: nvec: nvec_kbd: Convert to platform remove callback returning void staging: nvec_power: Convert to platform remove callback returning void staging: nvec_ps2: Convert to platform remove callback returning void staging: octeon: ethernet: Convert to platform remove callback returning void staging: vc04_services: bcm2835-camera: Convert to platform remove callback returning void staging: vc04_services: vchiq_arm: Convert to platform remove callback returning void drivers/staging/axis-fifo/axis-fifo.c | 6 ++---- drivers/staging/emxx_udc/emxx_udc.c | 6 ++---- drivers/staging/fieldbus/anybuss/arcx-anybus.c | 5 ++--- drivers/staging/greybus/arche-apb-ctrl.c | 6 ++---- drivers/staging/greybus/arche-platform.c | 6 ++---- drivers/staging/media/deprecated/atmel/atmel-sama5d2-isc.c | 6 ++---- drivers/staging/media/deprecated/atmel/atmel-sama7g5-isc.c | 6 ++---- drivers/staging/media/imx/imx-media-csi.c | 6 ++---- drivers/staging/media/imx/imx-media-dev.c | 6 ++---- drivers/staging/media/imx/imx6-mipi-csi2.c | 6 ++---- drivers/staging/media/imx/imx8mq-mipi-csi2.c | 6 ++---- drivers/staging/media/meson/vdec/vdec.c | 6 ++---- drivers/staging/media/omap4iss/iss.c | 6 ++---- drivers/staging/media/rkvdec/rkvdec.c | 5 ++--- drivers/staging/media/sunxi/cedrus/cedrus.c | 6 ++---- drivers/staging/media/sunxi/sun6i-isp/sun6i_isp.c | 6 ++---- drivers/staging/most/dim2/dim2.c | 6 ++---- drivers/staging/nvec/nvec.c | 6 ++---- drivers/staging/nvec/nvec_kbd.c | 6 ++---- drivers/staging/nvec/nvec_power.c | 6 ++---- drivers/staging/nvec/nvec_ps2.c | 6 ++---- drivers/staging/octeon/ethernet.c | 5 ++--- .../staging/vc04_services/bcm2835-camera/bcm2835-camera.c | 6 ++---- .../staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 6 ++---- 24 files changed, 48 insertions(+), 93 deletions(-) base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6 -- 2.39.2

2 years, 5 months

[PATCH] staging: greybus: loopback: fix up checkpath macro do while error.

by Angel Alberto Carretero

Wrap macro in a do-while statement. Signed-off-by: Angel Alberto Carretero <angelalbertoc.r(a)gmail.com> --- drivers/staging/greybus/loopback.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c index d7b39f3bb652..371809770ed0 100644 --- a/drivers/staging/greybus/loopback.c +++ b/drivers/staging/greybus/loopback.c @@ -162,9 +162,11 @@ static ssize_t name##_avg_show(struct device *dev, \ static DEVICE_ATTR_RO(name##_avg) #define gb_loopback_stats_attrs(field) \ - gb_loopback_ro_stats_attr(field, min, u); \ - gb_loopback_ro_stats_attr(field, max, u); \ - gb_loopback_ro_avg_attr(field) + do { \ + gb_loopback_ro_stats_attr(field, min, u); \ + gb_loopback_ro_stats_attr(field, max, u); \ + gb_loopback_ro_avg_attr(field); \ + } while (0) #define gb_loopback_attr(field, type) \ static ssize_t field##_show(struct device *dev, \ -- 2.40.0

2 years, 5 months

Re: [PATCH] staging: greybus: refactor arche_platform_wd_irq() function

by Alison Schofield

On Tue, Mar 28, 2023 at 10:33:23AM +0300, Dan Carpenter wrote: > On Tue, Mar 28, 2023 at 01:18:53AM +0500, Khadija Kamran wrote: > > Refactor function by adding goto statement. This reduces the > > indentation and fixes the issue reported by checkpatch.pl script. > > > > "CHECK: line length of 101 exceeds 100 columns" > > > > Signed-off-by: Khadija Kamran <kamrankhadijadj(a)gmail.com> > > --- > > drivers/staging/greybus/arche-platform.c | 11 ++++++----- > > 1 file changed, 6 insertions(+), 5 deletions(-) > > > > diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c > > index fcbd5f71eff2..c7d3b6f7368f 100644 > > --- a/drivers/staging/greybus/arche-platform.c > > +++ b/drivers/staging/greybus/arche-platform.c > > @@ -178,11 +178,7 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) > > */ > > if (arche_pdata->wake_detect_state != > > WD_STATE_COLDBOOT_START) { > > - arche_platform_set_wake_detect_state(arche_pdata, > > - WD_STATE_COLDBOOT_TRIG); > > - spin_unlock_irqrestore(&arche_pdata->wake_lock, > > - flags); > > - return IRQ_WAKE_THREAD; > > + goto out; > > I don't like this goto. > > It suggests that calling arche_platform_set_wake_detect_state(arche_pdata, WD_STATE_COLDBOOT_TRIG); > is a part of a shared exit path when that is not true so it is sort of > lying to the reader and making things harder to understand. > > Unlocking is shared. goto unlock is fine. But that doesn't help with > the very long lines. (I am not saying that goto unlock is a worthwhile > patch to send but I would definitely have found it tolerable). > > regards, > dan carpenter Khadija, While you are reworking this, just wanted to note that, once 'out:' becomes the single exit path for the function, it won't be a lie any more. So you will have addressed Dan's concern. Alison > > > } > > } > > } > > @@ -205,6 +201,11 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) > > spin_unlock_irqrestore(&arche_pdata->wake_lock, flags); > > > > return IRQ_HANDLED; > > + > > +out: > > + arche_platform_set_wake_detect_state(arche_pdata, WD_STATE_COLDBOOT_TRIG); > > + spin_unlock_irqrestore(&arche_pdata->wake_lock, flags); > > + return IRQ_WAKE_THREAD; > > } > > > > /* > > -- > > 2.34.1 > > >

2 years, 5 months

Re: [PATCH] staging: greybus: refactor arche_platform_wd_irq() function

by Alison Schofield

On Tue, Mar 28, 2023 at 01:18:53AM +0500, Khadija Kamran wrote: > Refactor function by adding goto statement. This reduces the > indentation and fixes the issue reported by checkpatch.pl script. It seems our emails may have crossed on this issue. See: https://lore.kernel.org/outreachy/ZBrFqtyY%2FHydnBdT@kroah.com/T/#m5ac406a1… Alison > > "CHECK: line length of 101 exceeds 100 columns" > > Signed-off-by: Khadija Kamran <kamrankhadijadj(a)gmail.com> > --- > drivers/staging/greybus/arche-platform.c | 11 ++++++----- > 1 file changed, 6 insertions(+), 5 deletions(-) > > diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c > index fcbd5f71eff2..c7d3b6f7368f 100644 > --- a/drivers/staging/greybus/arche-platform.c > +++ b/drivers/staging/greybus/arche-platform.c > @@ -178,11 +178,7 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) > */ > if (arche_pdata->wake_detect_state != > WD_STATE_COLDBOOT_START) { > - arche_platform_set_wake_detect_state(arche_pdata, > - WD_STATE_COLDBOOT_TRIG); > - spin_unlock_irqrestore(&arche_pdata->wake_lock, > - flags); > - return IRQ_WAKE_THREAD; > + goto out; > } > } > } > @@ -205,6 +201,11 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) > spin_unlock_irqrestore(&arche_pdata->wake_lock, flags); > > return IRQ_HANDLED; > + > +out: > + arche_platform_set_wake_detect_state(arche_pdata, WD_STATE_COLDBOOT_TRIG); > + spin_unlock_irqrestore(&arche_pdata->wake_lock, flags); > + return IRQ_WAKE_THREAD; > } > > /* > -- > 2.34.1 > >

2 years, 5 months

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