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path: root/drivers/spi/spi-loopback-test.c
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2021-05-10spi: spi-loopback-test: Fix 'tx_buf' might be 'rx_buf'Jay Fang1-1/+1
In function 'spi_test_run_iter': Value 'tx_buf' might be 'rx_buf'. Signed-off-by: Jay Fang <f.fangjian@huawei.com> Link: https://lore.kernel.org/r/1620629903-15493-5-git-send-email-f.fangjian@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-04-09treewide: Change list_sort to use const pointersSami Tolvanen1-1/+2
list_sort() internally casts the comparison function passed to it to a different type with constant struct list_head pointers, and uses this pointer to call the functions, which trips indirect call Control-Flow Integrity (CFI) checking. Instead of removing the consts, this change defines the list_cmp_func_t type and changes the comparison function types of all list_sort() callers to use const pointers, thus avoiding type mismatches. Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210408182843.1754385-10-samitolvanen@google.com
2020-09-02spi: spi-loopback-test: Fix out-of-bounds readVincent Whitchurch1-1/+1
The "tx/rx-transfer - crossing PAGE_SIZE" test always fails when len=131071 and rx_offset >= 5: spi-loopback-test spi0.0: Running test tx/rx-transfer - crossing PAGE_SIZE ... with iteration values: len = 131071, tx_off = 0, rx_off = 3 with iteration values: len = 131071, tx_off = 0, rx_off = 4 with iteration values: len = 131071, tx_off = 0, rx_off = 5 loopback strangeness - rx changed outside of allowed range at: ...a4321000 spi_msg@ffffffd5a4157690 frame_length: 131071 actual_length: 131071 spi_transfer@ffffffd5a41576f8 len: 131071 tx_buf: ffffffd5a4340ffc Note that rx_offset > 3 can only occur if the SPI controller driver sets ->dma_alignment to a higher value than 4, so most SPI controller drivers are not affect. The allocated Rx buffer is of size SPI_TEST_MAX_SIZE_PLUS, which is 132 KiB (assuming 4 KiB pages). This test uses an initial offset into the rx_buf of PAGE_SIZE - 4, and a len of 131071, so the range expected to be written in this transfer ends at (4096 - 4) + 5 + 131071 == 132 KiB, which is also the end of the allocated buffer. But the code which verifies the content of the buffer reads a byte beyond the allocated buffer and spuriously fails because this out-of-bounds read doesn't return the expected value. Fix this by using ITERATE_LEN instead of ITERATE_MAX_LEN to avoid testing sizes which cause out-of-bounds reads. Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> Link: https://lore.kernel.org/r/20200902132341.7079-1-vincent.whitchurch@axis.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-07-17spi: spi-loopback-test: Fix formatting issues in function header blocksLee Jones1-8/+8
Kerneldoc function parameter descriptions must be in '@.*: ' format. Fixes the following W=1 kernel build warning(s): drivers/spi/spi-loopback-test.c:897: warning: Function parameter or member 'spi' not described in 'spi_test_execute_msg' drivers/spi/spi-loopback-test.c:897: warning: Function parameter or member 'test' not described in 'spi_test_execute_msg' drivers/spi/spi-loopback-test.c:897: warning: Function parameter or member 'tx' not described in 'spi_test_execute_msg' drivers/spi/spi-loopback-test.c:897: warning: Function parameter or member 'rx' not described in 'spi_test_execute_msg' drivers/spi/spi-loopback-test.c:970: warning: Function parameter or member 'spi' not described in 'spi_test_run_test' drivers/spi/spi-loopback-test.c:970: warning: Function parameter or member 'test' not described in 'spi_test_run_test' drivers/spi/spi-loopback-test.c:970: warning: Function parameter or member 'tx' not described in 'spi_test_run_test' drivers/spi/spi-loopback-test.c:970: warning: Function parameter or member 'rx' not described in 'spi_test_run_test' Signed-off-by: Lee Jones <lee.jones@linaro.org> Cc: Mark Brown <broonie@kernel.org> Cc: Martin Sperl <kernel@martin.sperl.org> Cc: linux-spi@vger.kernel.org Link: https://lore.kernel.org/r/20200717135424.2442271-2-lee.jones@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-10-15spi: spi-loopback-test: use new `delay` fieldAlexandru Ardelean1-3/+9
This change replaces the use of the `delay_usecs` field with the new `delay` field. The code/test still uses micro-seconds, but they are now configured and used via the `struct spi_delay` format of the `delay` field. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Link: https://lore.kernel.org/r/20190926105147.7839-13-alexandru.ardelean@analog.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157Thomas Gleixner1-10/+1
Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-07-26spi: loopback-test: implement testing with no CSOleksij Rempel1-3/+9
To run spi-loopback-tests on HW without modifications, we need to disable Chip Select. This should avoid surprising side effects for SPI devices by testing patterns. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-07-18spi: loopback-test: make several module parameters staticColin Ian King1-7/+7
Several module parameters are local to the source, so make them static. Cleans up several sparse warnings such as: "symbol 'loop_req' was not declared. Should it be static?" Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-07-17spi: loopback-test: provide loop_req option.Oleksij Rempel1-0/+16
Provide a module parameter to request internal loop by the SPI master controller. This should make loop testing easier without extra HW modification. For test automation a logic analyzer is recommended for host controller-independent verification. An example test rig configuration and procedure: i.MX6S RIoRBoard Logic Analyzer ----------------------------------------- (J13 4) GND ------------- GND (J13 6) CSPI3-CLK ------> PIN 3 (J13 8) CSPI3-MOSI <----- PIN 2 ^ - internal loop configured by SPI_LOOP | or can be user external jamper. (J13 10) CSPI3-MISO -----> PIN 1 grab some data and decode it: sigrok-cli -d fx2lafw --time 160000 --config samplerate=10m \ --channels 0-2 -o dump.sr sigrok-cli -i dump.sr -P spi:mosi=1:clk=2 > result_for_regression_tests Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-28spi: loopback-test: Fix kfree() NULL pointer error.Arvind Yadav1-6/+6
Here, rx/tx allocation can fail. So avoid kvfree call with NULL pointer. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-28spi: loopback-test: fix spelling mistake: "reruning" -> "rerunning"Colin Ian King1-1/+1
trivial fix to spelling mistake in dev_info error message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-04-26Merge remote-tracking branches 'spi/topic/spidev', 'spi/topic/spidev-test', ↵Mark Brown1-41/+78
'spi/topic/sunxi', 'spi/topic/tegra' and 'spi/topic/test' into spi-next
2017-03-30spi: loopback-test: fix spelling mistake: "minimam" -> "minimum"Colin Ian King1-1/+1
trivial fix to spelling mistake in dev_err error message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-20spi: loopback-test: fix potential integer overflow on multipleColin Ian King1-1/+2
A multiplication of 8U * xfer-len with the type of a 32 bit unsigned int is evaluated using 32 bit arithmetic and then used in a context that expects an expression of type unsigned long long (64 bits). Avoid any potential overflow by casting BITS_PER_BYTE to unsigned long long. Detected by CoverityScan, CID#1419691 ("Unintentional integer overflow") Fixes: ea9936f324356 ("spi: loopback-test: add elapsed time check") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-18spi: loopback-test: add test spi_message with delay after transfersAkinobu Mita1-0/+19
This adds a new test to check whether the spi_transfer.delay_usecs setting has properly taken effect. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-18spi: loopback-test: add elapsed time checkAkinobu Mita1-0/+38
This adds checks whether the elapsed time is longer than the minimam estimated time. The estimated time is calculated with the total transfer length per clock rate and optional spi_transfer.delay_usecs. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-18spi: loopback-test: add ability to test zero-length transferAkinobu Mita1-38/+17
The spi-loopback-test module currently cannot test the spi_message including a zero-length transfer. Because the zero-length transfer is treated as a special value in several meanings. 1. The number of spi_transfer to execute in one test case is described by spi_test.transfer_count. It is normally computed by counting number of transfers with len > 0 in spi_test.transfers array. This change stops the detection for the number of spi_transfer. Each spi_test.transfer_count needs to be filled by hand now. 2. The spi_test.iterate_len is a list of transfer length to iterate on. This list is terminated by zero, so zero-length transfer cannot be included. This changes the terminal value from 0 to -1. 3. The length for the spi_transfer masked by spi_test.iterate_transfer_mask is iterated. Before starting the iteration, the default value which is statically initialized is applied. In order to specify the default value, zero-length is reserved. Currently, the default values are always '1'. So this removes this trick and add '1' to iterate_len list. By applying all these changes, the spi-loopback-test can execute spi messages with zero-length transfer. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-18spi: loopback-test: don't skip comparing the first byte of rx_bufAkinobu Mita1-1/+1
When the loopback parameter is set, rx_buf are compared with tx_buf after the spi_message is executed. But the first byte of buffer is not checked. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-18spi: loopback-test: correct mismatched test description and configurationAkinobu Mita1-2/+2
The test "two tx-transfers - alter first" actually alters the second not the first transfer. Similarly the test "two tx-transfers - alter second" actually alters the first not the second transfer. The mismatches for the two symmetrical tests cancel each other's mistakes. But it's better to fix the mismatches to avoid confusion. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-17spi: loopback-test: fix compile error on x86Frode Isaksen1-0/+1
Fix compile error caused by missing vmalloc() definition on x86 (and maybe other platforms) by including vmalloc.h. Signed-off-by: Frode Isaksen <fisaksen@baylibre.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-03-15spi: loopback-test: add option to use vmalloc'ed buffersFrode Isaksen1-7/+27
Using vmalloc'ed buffers will use one SG entry for each page, that may provoke DMA errors for large transfers. Also vmalloc'ed buffers may cause errors on CPU's with VIVT cache. Add this option to catch these errors when testing. Note that to catch VIVT cache errors, checking the rx range has to be disabled, so this option has been added as well. Signed-off-by: Frode Isaksen <fisaksen@baylibre.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-09-01spi: loopback-test: mark rx_ranges_cmp() staticBaoyou Xie1-1/+1
We get 1 warning when building kernel with W=1: drivers/spi/spi-loopback-test.c:408:5: warning: no previous prototype for 'rx_ranges_cmp' [-Wmissing-prototypes] In fact, this function is only used in the file in which it is declared and don't need a declaration, but can be made static. So this patch marks it 'static'. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-28spi: loopback-test: fix spelling mistake: "missmatch" -> "mismatch"Colin Ian King1-1/+1
trivial fix to spelling mistake in dev_err message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-15spi: fix counting in spi-loopback-test codeArnd Bergmann1-0/+1
These variables are always used uninitialized: drivers/spi/spi-loopback-test.c: In function 'spi_test_run_iter': drivers/spi/spi-loopback-test.c:768:17: warning: 'rx_count' may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/spi/spi-loopback-test.c:762:17: warning: 'tx_count' may be used uninitialized in this function [-Wmaybe-uninitialized] Adding an explicit initialization seems to be the only workable solution here, to make the code behave correctly and build without warning. Fixes: 84e0c4e5e2c4 ("spi: add loopback test driver to allow for spi_master regression tests") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-08spi: loopback: fix typo in MODULE_PARM_DESCDan Carpenter1-1/+1
There should be an 's' on "dump_message" so it matches the module_param. Fixes: 84e0c4e5e2c4 ('spi: add loopback test driver to allow for spi_master regression tests') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-05spi: loopback-test: spi_check_rx_ranges can get always doneMartin Sperl1-5/+14
The spi_check_rx_ranges can always get executed independent of if we have a real loopback situation. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-05spi: loopback-test: rename method spi_test_fill_tx to spi_test_fill_patternMartin Sperl1-3/+4
Rename method spi_test_fill_tx to spi_test_fill_pattern to better describe what it does. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-01-05spi: loopback-test: write rx pattern also when running without tx_bufMartin Sperl1-4/+4
Currently the rx_buf does not get set with the SPI_TEST_PATTERN_UNWRITTEN when tx_buf == NULL in the transfer. Reorder code so that it gets done also under this specific condition. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-13spi: loopback: match configuration of test to descriptionMartin Sperl1-1/+1
The test "two tx+rx transfers - alter second" actually modifies the first not the second transfer, which - in conjunction with testing the read data - results also in overwriting data read earlier. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-13spi: loopback: fix printk format issues with size_tMartin Sperl1-3/+3
Fixes the reported printk format issues reported by kbuild-test-robot. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-13spi: add loopback test driver to allow for spi_master regression testsMartin Sperl1-0/+995
This driver is submitting lots of distinct spi-messages messages with all kinds of alignments and length pattern. Also distinct kinds of transfer pattern tests are implemented (rx, tx, rx/tx, tx+tx, tx+rx,...) Right now on a raspberry pi 752 distinct spi_messages are executed in 13 different scenarios. Configuration of additional test-pattern is easy, so that when new bugs in drivers get detected the relevant transfer pattern can also get added to the test framework, so that such situations are detected in other drivers as well. The idea behind this driver is to make it possible to also detect regressions in spi_master implementations when changes occur. Potentially these tests could get executed automatically in a test-server-farm. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>