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path: root/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
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2023-06-14wifi: iwlwifi: dbg-tlv: clear FW debug memory on initJohannes Berg
When we restart the firmware, we shouldn't keep old debug data around. Since the "allocate" function might not reallocate the memory blocks (they're only freed when we unbind from the device), clear the memory to have a clean slate for debug data. This is a bit more complex since we normally don't enter into the allocation function, but duplicating the logic didn't seem enticing either, so rework the allocation a bit to always go into the individual block allocation, but there clear if it's already allocated, rather than allocating again. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230613155501.30b82881cfbf.I39520aff8ac95ee64d39dc5913525a1efd7995fa@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-14wifi: iwlwifi: dbg-tlv: fix DRAM data initJohannes Berg
Given the existing code in iwl_dbg_tlv_update_drams(), the following can happen and cause firmware asserts, and even the device to become unusable: * We set the magic so the firmware will use the data; * we try to fill multiple allocation IDs, with at least one successful, but - crucially - one failing and thus not touching the data; * we don't clear the data since there was one success. This doesn't seem like much of a problem just yet, however, what happens now is that the allocation ID(s) that failed are not initialized. There are two additional things to know: * we never free these allocations across FW restart or interface down/up etc., in fact we never free them until the driver is unbound from the device (e.g. unloaded) * the firmware uses the DRAM info structure for real debug data when it has used it completely Given that, and the fact that we never initialize the data on restart, we can be unlucky and end up with an allocation that looks for the most part valid (valid ID, valid number of buffers, etc.) but has bad sizes - causing the firmware to throw an assert we can never recover from. Fixing the code to have the entire buffers cleared (which we should do so old debug data isn't sticking around) is a bit more complex, so as a first step make the actual code that fills the information more robust by clearing the structure first, and filling the magic values only if it actually succeeded for one, rather than doing it the other way around. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230613155501.87cf5528f4bc.I26ac907a4162297808b33467fc7f5d8177474a34@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-06wifi: iwlwifi: do not log undefined DRAM buffers unnecessarilyBenjamin Berg
DRAM buffers that are not defined in the TLVs (or are unused in the preset) would cause a log message. To avoid confusion, skip processing buffers with an invalid (i.e. uninitialized) DRAM path. This further reduces the noise of the message in cases where it is unlikely to be helpful. Also update a related debug log string to better describe what is happening. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230531194629.ecae60cf2d7f.Ib44a94d4aeb55dbb2e52edea8b69a09bc0f722c3@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-04-17wifi: iwlwifi: move debug buffer allocation failure to info verbosityGolan Ben Ami
This is noising the kernel log and customers asked to hush it down. We can live with this message in "info" verbosity. Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230416154301.0a7f557aa2a0.If9db474b63242b1bfaed659aa174b678ae8dc196@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-04-14wifi: iwlwifi: yoyo: Fix possible division by zeroDaniel Gabay
Don't allow buffer allocation TLV with zero req_size since it leads later to division by zero in iwl_dbg_tlv_alloc_fragments(). Also, NPK/SRAM locations are allowed to have zero buffer req_size, don't discard them. Fixes: a9248de42464 ("iwlwifi: dbg_ini: add TLV allocation new API support") Signed-off-by: Daniel Gabay <daniel.gabay@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230413213309.5d6688ed74d8.I5c2f3a882b50698b708d54f4524dc5bdf11e3d32@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-07wifi: iwlwifi: Update logs for yoyo reset sw changesMukesh Sisodiya
Update the log category for the reset-fw changes. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230305124407.852a6b5f95fa.Ie67bd28da65c7e42424cacb37495930475de2dad@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-07wifi: iwlwifi: reduce verbosity of some logging eventsGolan Ben Ami
These are cases in which we'd like to warn that something unexpected happened but they may not be errors. Reduce verbosity. Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230305124407.5eea0f58a74f.Ifb6b35903a5a452a757bfe50b6a7e58b3fd2ef23@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-12-25treewide: Convert del_timer*() to timer_shutdown*()Steven Rostedt (Google)
Due to several bugs caused by timers being re-armed after they are shutdown and just before they are freed, a new state of timers was added called "shutdown". After a timer is set to this state, then it can no longer be re-armed. The following script was run to find all the trivial locations where del_timer() or del_timer_sync() is called in the same function that the object holding the timer is freed. It also ignores any locations where the timer->function is modified between the del_timer*() and the free(), as that is not considered a "trivial" case. This was created by using a coccinelle script and the following commands: $ cat timer.cocci @@ expression ptr, slab; identifier timer, rfield; @@ ( - del_timer(&ptr->timer); + timer_shutdown(&ptr->timer); | - del_timer_sync(&ptr->timer); + timer_shutdown_sync(&ptr->timer); ) ... when strict when != ptr->timer ( kfree_rcu(ptr, rfield); | kmem_cache_free(slab, ptr); | kfree(ptr); ) $ spatch timer.cocci . > /tmp/t.patch $ patch -p1 < /tmp/t.patch Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/ Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ] Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ] Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-11-10wifi: iwlwifi: dbg: use bit of DRAM alloc ID to store failed allocsRotem Saado
The failed_alloc variable is used as a bitmask in the loop where we check DRAM allocations. But erroneously, we were clearing the DRAM alloc IDs we removed as an integer. Fix that by clearing them as bits instead. Signed-off-by: Rotem Saado <rotem.saado@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20221102165239.688dec28b1d9.I470b8d29c28d16f25f4192773f075940de7ed33c@changeid
2022-11-10wifi: iwlwifi: dbg: add support for DBGC4 on BZ family and aboveRotem Saado
Update the for loop that iterates over all the DBGCs to include DBGC4. DBGC4 is only supported staring from the BZ family of devices, so check the family before accepting it. Signed-off-by: Rotem Saado <rotem.saado@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20221102165239.0b6050b41060.Id662c716c2e3c2c850740d1f71e2801e02aeddaf@changeid
2022-04-23iwlwifi: iwl-dbg: Use del_timer_sync() before freeingGuenter Roeck
In Chrome OS, a large number of crashes is observed due to corrupted timer lists. Steven Rostedt pointed out that this usually happens when a timer is freed while still active, and that the problem is often triggered by code calling del_timer() instead of del_timer_sync() just before freeing. Steven also identified the iwlwifi driver as one of the possible culprits since it does exactly that. Reported-by: Steven Rostedt <rostedt@goodmis.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Johannes Berg <johannes.berg@intel.com> Cc: Gregory Greenman <gregory.greenman@intel.com> Fixes: 60e8abd9d3e91 ("iwlwifi: dbg_ini: add periodic trigger new API support") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Gregory Greenman <gregory.greenman@intel.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> # Linux v5.17.3-rc1 and Debian LLVM-14 Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20220411154210.1870008-1-linux@roeck-us.net
2022-02-18iwlwifi: dbg_ini: Split memcpy() to avoid multi-field writeKees Cook
To avoid a run-time false positive in the stricter FORTIFY_SOURCE memcpy() checks, split the memcpy() into the struct and the data. Additionally switch the data member to a flexible array to follow modern language conventions. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210727205855.411487-64-keescook@chromium.org Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: yoyo: support dump policy for the dump sizeMukesh Sisodiya
Support dump size limitation based on the TLV by firmware. This is needed for limited memory systems so only the most important dumps are sent by driver. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220210181930.d7e1ff264766.If2327fd890a453cdc9069d26220394d0b4e79743@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: yoyo: Avoid using dram data if allocation failedMukesh Sisodiya
The config set TLV setting depend on dram allocation and if allocation failed the data used in config set tlv should not set this. Adding the check if dram fragment is available or not. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Fixes: 1a5daead217c ("iwlwifi: yoyo: support for ROM usniffer") Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220204122220.44835d181528.I3e78ba29c13bbeada017fcb2a620f3552c1dfa30@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: avoid variable shadowingJohannes Berg
Change a few places to not shadow variables. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220130115024.d53f2a7a9614.I7441559451d54b39dc0daeb4c31e5dce19d4d83e@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: dbg-tlv: clean up iwl_dbg_tlv_update_drams()Johannes Berg
This function puts a fairly large structure unnecessarily on the stack, and also has a few other very strange things, clean it up a bit. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220130115024.9f2c282a3104.If6b868c96c0d089579ca72fd270387de81359d5b@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: yoyo: add IMR DRAM dump supportMukesh Sisodiya
Support debug collection of the platform IMR memory region, where data is copied by FW during d3 state Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220129105618.715f04ecc635.Ib89a6caa06c1324c1c0dd3f9f4cf7407f2857155@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: yoyo: fix DBGC allocation flowRotem Saado
number of DBGCs and number of fragments per DBGC is hw family dependency and not capability. Signed-off-by: Rotem Saado <rotem.saado@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220129105618.209c6fe4364a.I5b21769d297d6fcfafc58ddf1db87d88349fe06f@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: fix various more -Wcast-qual warningsJohannes Berg
When enabling W=3 that gets us -Wcast-qual, fix those warnings in the code and propagate constness properly, or cast it away via (uintptr_t) where really needed. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220128153014.4ac2f19c121e.Ied9469d93f8199206242bfba96e4e8d1949e3a08@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2022-02-18iwlwifi: propagate (const) type qualifierBjoern A. Zeeb
Most of this change is a continuation of commit 403ea939ea6a ("iwlwifi: dbg: Mark ucode tlv data as const") propagating the (const) type qualifier for ucode based tlv data to avoid having the impression that it is writeable. The other part of the change preserves the (const) type qualifier over casts and function calls where it was previously lost. Both changes are needed to avoid compile time errors on system with more strict error settings, in this case found with clang on FreeBSD. Sponsored by: The FreeBSD Foundation Signed-off-by: Bjoern A. Zeeb <bz@FreeBSD.ORG> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> [fix double word in commit message] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220128153014.3230c41312fc.I0032c597984834258d5a79b97052ed83dbe53b80@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-12-21iwlwifi: yoyo: support TLV-based firmware resetMukesh Sisodiya
Support resetting the firmware via TLV-based debugging. When applied, this will cause the driver to reset the firmware when the debugging is triggered. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211219121514.d59b29653a1e.I7b3be4a1ad1a9d5d0e86259740e89ac113c9348b@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-12-21iwlwifi: fix debug TLV parsingJohannes Berg
Debug TLV parsing was missing size checks, so if a valid but too short TLV was encountered, it would attempt to read it. If the firmware file was arranged to be a multiple of pages long with this happening just before the end, it could crash reading out-of-bounds of a vmalloc area. Fix this by adding the relevant size check. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211210110539.84848da8067f.Ifb4f80c95d283ec62e495a7928069af711b5fee2@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-12-07iwlwifi: dbg: disable ini debug in 8000 family and belowMukesh Sisodiya
Yoyo based debug is not applicable for 8000 and below old devices. The check added in code has 9000 and below familiy which is corrected. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211204174546.b6176a5bc198.Ib8e4b1e60e0b6c1538cc4f384dcf681b3db097ce@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-12-07iwlwifi: fw: add support for splitting region type bitsMordechay Goodstein
In next region tlv (3) region type is going to be split into bit mask without affecting the ops for handling region type, so we just mask the type independent of the version due to all versions having the same bits usage. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211204130722.083e4b47055e.If7483d854e3d07f81236d314b8155cd5996f306c@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-10-28iwlwifi: yoyo: support for ROM usnifferMukesh Sisodiya
Add handling of config set TLV for ROM usniffer support. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211024181719.507212be427a.I36acb6ca84095963614be70dc944ba0d98ee770c@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-10-22iwlwifi: dbg: treat non active regions as unsupported regionsRotem Saado
If a region is not active, it means that it was not defined as a region TLV in the FW image. We should treat them as unsupported in that case. This saves operational driver memory and run time when collecting debug data by skipping unsupported regions. Signed-off-by: Rotem Saado <rotem.saado@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211017165728.8025bd29d86a.I3ecb4e273bf714e426d82217e0590264cb763419@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-10-22iwlwifi: dbg: treat dbgc allocation failure when tlv is missingRotem Saado
in case allocation tlv is missing for specific dbgc id, treat it as allocation failure. with this behavior we removing later the unsupported regions relating to the failed dbgc allocation. this saves operational driver memory and run time at collecting debug data. Signed-off-by: Rotem Saado <rotem.saado@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211017165728.4cd241abf1de.I8f6cf00a7266675dfebdc01a73c1ac6e001855b9@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-10-22iwlwifi: yoyo: fw debug config from context info and presetMukesh Sisodiya
Add new TLV for debug config set to read preset based on TLV is set in context info. This is needed to set the preset based on ucode in early trigger point. Add DRAM frag allocation info in first fragment of DBGC1 with all details. New capability from FW for DBGC frag debug support is added and BUFFER_ALLOCATION_CMD is disabled in capability is supported. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211017123741.cacf0babc521.If3704b5fda09b344e3e438252360898a3f2e90fa@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-08-26iwlwifi: allow debug init in RF-killJohannes Berg
We can send this even if initializing in RF-kill, thus suppressing a bunch of error messages about it. In fact, we _want_ to, since we might still want to debug the firmware even if in RF-kill. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20210819183728.bcdb076609e2.I2d177c00772510b5338d8aa45af7558138b08448@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-08-26iwlwifi: yoyo: cleanup internal buffer allocation in D3Mukesh Sisodiya
With recent changes in the firmware SRAM debug during D3 is enabled by default and need not be enabled by driver. cleaning the code to align the same. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20210802215208.8535203d0ef7.Ib1695ce5de921b0472d0b1052e729e071573b863@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-08-26iwlwifi: iwl-dbg-tlv: add info about loading external dbg binMordechay Goodstein
This helps understand why and what debug capabilities are running. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20210802170640.98980f8bd17f.Ifcedf415a545a87cb341a4142085b5723d8cac4d@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-08-26iwlwifi: prepare for synchronous error dumpsJohannes Berg
In some cases it may be necessary to synchronously create a firmware error report, add the necessary infrastructure for this. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20210802170640.481b6642f0fc.I7c9c958408a285e3d19aceed2a5a3341cfc08382@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-06-22iwlwifi: yoyo: support region TLV version 2Mukesh Sisodiya
Region TLV version 2 now includes more data, but it is not relevant for the driver. In order to support this new version, just mask the new part out. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20210612142637.60dd4c60ab49.I44fe02af389d3ab089363bf9bde0d99a4c1ff383@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-04-14iwlwifi: dbg: disable ini debug in 9000 family and belowMukesh Sisodiya
Yoyo based debug is not applicable to old devices. As init debug is enabled by default in the driver, it needs to be disabled to work the old debug mechanism in old devices. Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com> Fixes: b0d8d2c27007 ("iwlwifi: yoyo: enable yoyo by default") Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20210411132130.805401a1b8ec.I30db38184a418cfc1c5ca1a305cc14a52501d415@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-02-10iwlwifi: dbg: remove unsupported regionsMordechay Goodstein
In case user requested to register an unsupported regions, remove it from active list and trigger list, this saves operational driver memory and run time at collecting debug data. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20210210142629.a0cc944040e8.I3ae37547452b39f8040428c21ed47bdc67ae8f71@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-02-10iwlwifi: dbg: Mark ucode tlv data as constTakashi Iwai
The ucode TLV data may be read-only and should be treated as const pointers, but currently a few code forcibly cast to the writable pointer unnecessarily. This gave developers a wrong impression as if it can be modified, resulting in crashing regressions already a couple of times. This patch adds the const prefix to those cast pointers, so that such attempt can be caught more easily in future. Signed-off-by: Takashi Iwai <tiwai@suse.de> Acked-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/20210112132449.22243-3-tiwai@suse.de Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2021-01-14iwlwifi: dbg: Don't touch the tlv dataTakashi Iwai
The commit ba8f6f4ae254 ("iwlwifi: dbg: add dumping special device memory") added a termination of name string just to be sure, and this seems causing a regression, a GPF triggered at firmware loading. Basically we shouldn't modify the firmware data that may be provided as read-only. This patch drops the code that caused the regression and keep the tlv data as is. Fixes: ba8f6f4ae254 ("iwlwifi: dbg: add dumping special device memory") BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1180344 BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=210733 Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai <tiwai@suse.de> Acked-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20210112132449.22243-2-tiwai@suse.de
2020-12-10iwlwifi: use SPDX tagsJohannes Berg
Use SPDX tags instead of the long copyright notices. Also cleanup some duplicate copyright notices and combine the years where possible. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20201210000603.481bcb512a6f.I8146abe5a637079e7336209f23cb26af98b12b31@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2020-12-10iwlwifi: dbg-tlv: fix old length in is_trig_data_contained()Johannes Berg
There's a bug in the lengths - the 'old length' needs to be calculated using the 'old' pointer, of course, likely a copy/paste mistake. Fix this. Reported-by: Daniel Gabay <daniel.gabay@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Fixes: cf29c5b66b9f ("iwlwifi: dbg_ini: implement time point handling") Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20201209231352.c0105ddffa74.I1ddb243053ff763c91b663748b6a593ecc3b5634@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2020-10-01iwlwifi: yoyo: add support for internal buffer allocation in D3Mordechay Goodstein
With yoyo a user can configure the internal buffer allocation in SMEM to hold more log space, which is used for debugging D3 state. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200930191738.29b61ff6c78e.I235614bb2c255ee8ac49c2835796ac95a25215bf@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2020-10-01iwlwifi: dbg: add debug host notification (DHN) time pointMordechay Goodstein
This enables to listen only to DHN time point without monitoring every rx packet from FW. Also fix a typo NOTIFOCATION->NOTIFICATION in enum declaration. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200930191738.435fa657a937.I1a36badd4ceecefcdfb47eaacf26c08a4bbd1b08@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2020-10-01iwlwifi: dbg: run init_cfg function once per driver loadMordechay Goodstein
Every time we call init_cfg driver appends the enabled triggers to the active triggers while this should be done only once per driver load. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Fixes: 14124b25780d ("iwlwifi: dbg_ini: implement monitor allocation flow") Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200930161256.79bd622e604a.Ie0f79d2ea90ca5cdf363f56194ead81b0a2c6202@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2020-10-01iwlwifi: dbg: remove no filter conditionMordechay Goodstein
Currently if group-id and command-id values are zero we trigger and collect every RX frame, this is not the right behavior and zero value should be handled like any other filter. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Fixes: 3ed34fbf9d3b ("iwlwifi: dbg_ini: support FW response/notification region type") Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200930161256.6a0aae2c0507.I7bd72968279d586af420472707d53106b35efc08@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2020-10-01iwlwifi: dbg: add dumping special device memoryMordechay Goodstein
With the new region we can handle in user space understanding the struct type and version and driver doesn't need to be involved at all. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200926002540.88c431fad7da.I282944cbad5aa367735a9f9a5c47cfbd107a5fc0@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2020-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers.gitKalle Valo
mt76 driver had major conflicts within mt7615 directory. To make it easier for every merge wireless-drivers to wireless-drivers-next and solve those conflicts.
2020-08-02iwlwifi: yoyo: don't print failure if debug firmware is missingWolfram Sang
Missing this firmware is not fatal, my wifi card still works. Even more, I couldn't find any documentation what it is or where to get it. So, I don't think the users should be notified if it is missing. If you browse the net, you see the message is present is in quite some logs. Better remove it. Signed-off-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20200625165210.14904-1-wsa@kernel.org
2020-06-23iwlwifi: fix crash in iwl_dbg_tlv_alloc_triggerJiri Slaby
The tlv passed to iwl_dbg_tlv_alloc_trigger comes from a loaded firmware file. The memory can be marked as read-only as firmware could be shared. In anyway, writing to this memory is not expected. So, iwl_dbg_tlv_alloc_trigger can crash now: BUG: unable to handle page fault for address: ffffae2c01bfa794 PF: supervisor write access in kernel mode PF: error_code(0x0003) - permissions violation PGD 107d51067 P4D 107d51067 PUD 107d52067 PMD 659ad2067 PTE 8000000662298161 CPU: 2 PID: 161 Comm: kworker/2:1 Not tainted 5.7.0-3.gad96a07-default #1 openSUSE Tumbleweed (unreleased) RIP: 0010:iwl_dbg_tlv_alloc_trigger+0x25/0x60 [iwlwifi] Code: eb f2 0f 1f 00 66 66 66 66 90 83 7e 04 33 48 89 f8 44 8b 46 10 48 89 f7 76 40 41 8d 50 ff 83 fa 19 77 23 8b 56 20 85 d2 75 07 <c7> 46 20 ff ff ff ff 4b 8d 14 40 48 c1 e2 04 48 8d b4 10 00 05 00 RSP: 0018:ffffae2c00417ce8 EFLAGS: 00010246 RAX: ffff8f0522334018 RBX: ffff8f0522334018 RCX: ffffffffc0fc26c0 RDX: 0000000000000000 RSI: ffffae2c01bfa774 RDI: ffffae2c01bfa774 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000001 R10: 0000000000000034 R11: ffffae2c01bfa77c R12: ffff8f0522334230 R13: 0000000001000009 R14: ffff8f0523fdbc00 R15: ffff8f051f395800 FS: 0000000000000000(0000) GS:ffff8f0527c80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffae2c01bfa794 CR3: 0000000389eba000 CR4: 00000000000006e0 Call Trace: iwl_dbg_tlv_alloc+0x79/0x120 [iwlwifi] iwl_parse_tlv_firmware.isra.0+0x57d/0x1550 [iwlwifi] iwl_req_fw_callback+0x3f8/0x6a0 [iwlwifi] request_firmware_work_func+0x47/0x90 process_one_work+0x1e3/0x3b0 worker_thread+0x46/0x340 kthread+0x115/0x140 ret_from_fork+0x1f/0x40 As can be seen, write bit is not set in the PTE. Read of trig->occurrences succeeds in iwl_dbg_tlv_alloc_trigger, but trig->occurrences = cpu_to_le32(-1); fails there, obviously. This is likely because we (at SUSE) use compressed firmware and that is marked as RO after decompression (see fw_map_paged_buf). Fix it by creating a temporary buffer in case we need to change the memory. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Reported-by: Dieter Nützel <Dieter@nuetzel-hh.de> Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de> Cc: Johannes Berg <johannes.berg@intel.com> Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Cc: Luca Coelho <luciano.coelho@intel.com> Cc: Intel Linux Wireless <linuxwifi@intel.com> Cc: Kalle Valo <kvalo@codeaurora.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20200612073800.27742-1-jslaby@suse.cz
2020-05-08iwlwifi: yoyo: don't access TLV before verifying lenMordechay Goodstein
If we access the TLV memory with shorter len than the struct we access garbage data that was not given by the user. On the way rewrite the checker in a cleaner way. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Fixes: a9248de42464 ("iwlwifi: dbg_ini: add TLV allocation new API support") Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200424182644.54418c829390.I15d6b462a0e69a280b6c6cfbcb6bcb05bb5f79ee@changeid
2020-04-24iwlwifi: debug: set NPK buffer in context infoGil Adam
When buffer destination for ini debug is configured to NPK (TB22DTF) set the appropriate bit in the context info struct. Signed-off-by: Gil Adam <gil.adam@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200418110539.3c9f0fa6033f.Id1d6c191f85efe0d6cf35434bfb186ffd46ff64c@changeid
2020-03-27iwlwifi: yoyo: add PCI config space region typeLuca Coelho
Add a new region type that allows us to dump the PCI config space. This is mostly the same as dumping a memory region, but reading from the device's config space instead. In order to make this generic and independent of the trans type, we make a function called iwl_dump_ini_config_iter() that calls a new op in the transport to read its config space. Change-Id: I15151bddf589f13b0e0a45c28b96bbcd73bcfdeb Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-30 21:58:03 +0000