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path: root/drivers/mailbox/mailbox-test.c
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2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner1-5/+1
Based on 1 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-06mailbox: mailbox-test: fix null pointer if no mmioFabien Dessenne1-6/+8
Fix null pointer issue if resource_size is called with no ioresource. Signed-off-by: Ludovic Barre <ludovic.barre@st.com> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2019-03-06mailbox: mailbox-test: fix debugfs in multi-instancesFabien Dessenne1-6/+6
Create one debug entry directory per instance to support the multi instantiation. Signed-off-by: Ludovic Barre <ludovic.barre@st.com> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2018-02-11vfs: do bulk POLL* -> EPOLL* replacementLinus Torvalds1-1/+1
This is the mindless scripted replacement of kernel use of POLL* variables as described by Al, done by this script: for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'` for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done done with de-mangling cleanups yet to come. NOTE! On almost all architectures, the EPOLL* constants have the same values as the POLL* constants do. But they keyword here is "almost". For various bad reasons they aren't the same, and epoll() doesn't actually work quite correctly in some cases due to this on Sparc et al. The next patch from Al will sort out the final differences, and we should be all done. Scripted-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-28the rest of drivers/*: annotate ->poll() instancesAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-11-14mailbox: mailbox-test: don't rely on rx_buffer content to signal data readySudeep Holla1-5/+6
Currently we rely on the first byte of the Rx buffer to check if there's any data available to be read. If the first byte of the received buffer is zero (i.e. null character), then we fail to signal that data is available even when it's available. Instead introduce a boolean variable to track the data availability and update it in the channel receive callback as ready and clear it when the data is read. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-03-02sched/headers: Prepare to move signal wakeup & sigpending methods from ↵Ingo Molnar1-0/+1
<linux/sched.h> into <linux/sched/signal.h> Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-19mailbox: mailbox-test: allow reserved areas in SRAMSudeep Holla1-2/+10
When CONFIG_SRAM is enable and the SRAM region is found, the entire SRAM region resource is requested and marked as occupied by SRAM driver even if certain parts of regions is marked reserved. It's quite possible that a small region of the SRAM is reserved for all the mailbox communication and hence it may fail to request the region as it's already marked busy region. This patch tries to just do a ioremap of this mailbox memory region if it finds it busy. Cc: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: mailbox-test: add support for fasync/pollSudeep Holla1-8/+71
Currently the read operation on the message debug file returns error if there's no data ready to be read. It expects the userspace to retry if it fails. Since the mailbox response could be asynchronous, it would be good to add support to block the read until the data is available. We can also implement poll file operations so that the userspace can wait to become ready to perform any I/O. This patch implements the poll and fasync file operation callback for the test mailbox device. Cc: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-12-19mailbox: mailbox-test: Fix module autoloadJavier Martinez Canillas1-0/+1
If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/mailbox/mailbox-test.ko | grep alias $ After this patch: $ modinfo drivers/mailbox/mailbox-test.ko | grep alias alias: of:N*T*Cmailbox-testC* alias: of:N*T*Cmailbox-test Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-06-12mailbox: mailbox-test: set tdev->signal to NULL after freeingSudeep Holla1-0/+1
tdev->signal is not set NULL after it's freed. This will cause random exceptions when the stale pointer is accessed after tdev->signal is freed. Also, since tdev->signal allocation is skipped the next time it's written, this leads to continuous fault finally leading to the total death of the system. Fixes: d1c2f87c9a8f ("mailbox: mailbox-test: Prevent memory leak") Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-04-12mailbox: mailbox-test: Prevent memory leakLee Jones1-3/+6
If we set the Signal twice or more, without using it as part of a message, memory will be re-allocated and the pointer over-written. Prevent this potential leak by only allocating memory when there isn't any already. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-04-12mailbox: mailbox-test: Use more consistent format for calling copy_from_user()Lee Jones1-4/+3
While we're at it, ensure copy-to location is NULL'ed in the error path. Suggested-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-03-04mailbox: mailbox-test: add support for separate tx/rx buffer with single channelSudeep Holla1-10/+21
This patch adds support for different MMIO region for Tx and Rx paths. If only one region is specified, it's assumed to be shared between Rx and Tx, thereby retaining backward compatibility. Also in order to support single channel dealing with both Tx and Rx with dedicated MMIO regions, Tx channel itself is assigned to Rx if MMIO regions are different and Rx is not specified. Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-03-04mailbox: mailbox-test: use print_hex_dump_bytes to allow dynamic printkSudeep Holla1-10/+8
Reduce the logging from info to debug. Also use print_hex_dump_bytes instead as it has support for dynamic printk providing options to conditionally enable/disable these logs. Cc: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-03-04mailbox: mailbox-test: fix the compatible stringSudeep Holla1-1/+1
Underscores are usually forbidden in the compatible strings. So lets remove it before the first users of this is seen. Acked-by: Rob Herring <robh@kernel.org> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2016-03-04mailbox: mailbox-test: rename driver as generic test driverSudeep Holla1-1/+1
This mailbox-test driver was designed to be generic, so let's remove ST tag on it and make it generic. Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2015-11-04mailbox: mailbox-test: avoid reading iomem twiceJassi Brar1-3/+2
Don't pass mmio region as source to print_hex_dump() and then again to memcpy_fromio(). Do it once and give print_hex_dump() the buffer we just read the data in. Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2015-10-27mailbox: Off by one in mbox_test_message_read()Dan Carpenter1-1/+1
We need to leave space for the NUL char. Fixes: 8ea4484d0c2b ('mailbox: Add generic mechanism for testing Mailbox Controllers') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
2015-10-23mailbox: mailbox-test: Correctly repair Sparse warningsLee Jones1-5/+6
Kbuild test robot reported some Sparse warnings to the tune of: sparse: incorrect type in argument 6 (different address spaces) expected void const *buf got void [noderef] <asn:2>*mmio This was due to passing variables tagged with the Sparse cookie '__iomem' through into memcpy() and print_hex_dump() without adequate protection or casting. These issues were fixed in a previous patch suppressing the warnings, but the issue is indeed still present. This patch fixes the warnings in the correct way, i.e. by using the purposely authored memcpy_{from,to}io() derivatives in the memcpy() case and casting the memory address to (void *) and forcing Sparse to ignore to ignore it in the print_hex_dump() case [NB: This is also what the memcpy() derivatives do]. Reported-by: Peter Griffin <peter.griffin@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2015-10-17mailbox: Fix a couple of trivial static checker issuesLee Jones1-5/+5
This patch deals with a few spelling, white space and type warnings reported by Intel's Kbuild Test Robot. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2015-10-17mailbox: Add generic mechanism for testing Mailbox ControllersLee Jones1-0/+361
This particular Client implementation uses shared memory in order to pass messages between Mailbox users; however, it can be easily hacked to support any type of Controller. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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