Commit graph

1,169,205 commits

Author SHA1 Message Date
Wenjing Liu
a10a22b0ca drm/amd/display: update pixel rate div in enable stream
[why]
Pixel rate div depends on the type of encoder
that we are enabling stream with. If we swap between
HPO and DIO encoder at the time we call enable stream
for the new encoder, we must reprogram pixel rate div
based on the new encoder type.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:57:57 -05:00
Wenjing Liu
7462475e3a drm/amd/display: move dccg programming from link hwss hpo dp to hwss
[why] dccg clock programming shouldn't be part of link hwss programming
sequence. The scope of link hwss is limited to encoder and phy
programming.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:57:57 -05:00
Dmytro Laktyushkin
324de40a56 drm/amd/display: fix dc_get_edp_link_panel_inst to only consider links with panels
This function is meant to be used on multi-edp systems and only makes sense
if only links with connected panels are considered.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:57:57 -05:00
Nicholas Kazlauskas
2d90a1c054 drm/amd/display: Defer DIG FIFO disable after VID stream enable
[Why]
On some monitors we see a brief flash of corruption during the
monitor disable sequence caused by FIFO being disabled in the middle
of an active DP stream.

[How]
Wait until DP vid stream is disabled before turning off the FIFO.

The FIFO reset on DP unblank should take care of clearing any FIFO
error, if any.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Syed Hassan <Syed.Hassan@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:57:57 -05:00
Swapnil Patel
a1cbe6916f drm/amd/display: patch cases with unknown plane state to prevent warning
[Why]
DCN301 resource function is missing function pointer to
handle cases with unknown plane state.
This causes assertion when global state is validated while
using swizzle parameter as “DC_UNKNOWN”

[How]
Add function pointer to handle and patch cases when plane
state is unknown.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Swapnil Patel <Swapnil.Patel@amd.com>
Reviewed-by: Sung joon Kim <Sungjoon.Kim@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:57:57 -05:00
Alvin Lee
a5b50a0cbf drm/amd/display: Turn on phantom OTG before disabling phantom pipe
[Description]
- Proper phantom pipe disable sequence was missing in
  commit_planes_for_stream
- If disabling phantom pipe, turn on phantom OTG first, and turn
  off the phantom OTG after the plane is disabled
- Also update sequence for enabling / disabling phantom streams
  (apply_ctx_to_hw). When enabling phantom pipes, enable before
  doing front end programming for phantom pipes. If disabling
  phantom pipes, disable after front end programming (i.e. after
  phantom plane disable)
- TODO: Still need to properly handle transition case when a phantom
  pipe is transitioned directly into a real pipe (need to fully disable
  the phantom pipe first)

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:57:44 -05:00
Alan Liu
cbd8f20b48 drm/amd/display: Improvements in secure display
[Why]
- Need error message when failing to allocating secure_display_ctx.
- Need to check if secure display context in psp is initialized or not
before using it.

[How]
- Add error message when memory allocation fail.
- Add check before accessing psp secure display context.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alan Liu <HaoPing.Liu@amd.com>
Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:51:12 -05:00
Samson Tam
878a3c004c drm/amd/display: Uninitialized variables causing 4k60 UCLK to stay at DPM1 and not DPM0
[Why]
SwathSizePerSurfaceY[] and SwathSizePerSurfaceC[] values are uninitialized
 because we are using += instead of = operator.

[How]
Assign values in loop with = operator.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Samson Tam <samson.tam@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:50:48 -05:00
hersen wu
e8fd3eeb5e drm/amd/display: phase3 mst hdcp for multiple displays
[Why]
multiple display hdcp are enabled within event_property_validate,
event_property_update by looping all displays on mst hub. when
one of display on mst hub in unplugged or disabled, hdcp are
disabled for all displays on mst hub within hdcp_reset_display
by looping all displays of mst link. for displays still active,
their encryption status are off. kernel driver will not run hdcp
authentication again. therefore, hdcp are not enabled automatically.

[How]
within is_content_protection_different, check drm_crtc_state changes
of all displays on mst hub, if need, triger hdcp_update_display to
re-run hdcp authentication.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:50:39 -05:00
Christian König
0b04ea391c drm/amdgpu: allow zero as vram limit
This allows testing the driver without any VRAM.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:50:22 -05:00
Christian König
da2f992091 drm/amdgpu: cleanup visible vram size handling
Centralize the limit handling and validation in one place instead
of spreading that around in different hw generations.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:50:14 -05:00
Christian König
7ccfd79fdd drm/amdgpu: rename vram_scratch into mem_scratch
Rename vram_scratch into mem_scratch and allow allocating it into GTT as
well.

The only problem with that is that we won't have a default page for the
system aperture any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:50:03 -05:00
Christian König
58ab2c08d7 drm/amdgpu: use VRAM|GTT for a bunch of kernel allocations
Technically all of those can use GTT as well, no need to force things
into VRAM.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:49:54 -05:00
Saleemkhan Jamadar
9c705b96d2 drm/amdgpu: enable VCN DPG for GC IP v11.0.4
Enable VCN Dynamic Power Gating control for GC IP v11.0.4.

Signed-off-by: Saleemkhan Jamadar <saleemkhan.jamadar@amd.com>
Reviewed-by: Veerabadhran Gopalakrishnan <veerabadhran.gopalakrishnan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:49:43 -05:00
Likun Gao
360cd08196 drm/amdgpu: adjust the sequence to check soft reset
1.Drop soft reset check when do should recover gpu check.
  (As it will skip gpu reset operation if some ip is hang but
   not support soft reset)
2.Check soft reset status before do soft reset when pre asic reset.
  a. If check soft reset return true, it means: some ip is hang and
     it also support soft reset, will try soft reset first.
  b. If check soft reset return false, it means:
       I.  All the ip are not hang, will skip gpu reset.
       II. Some ip is hang but not support soft reset, will skip soft
           reset and retry with full reset later.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:49:26 -05:00
Mukul Joshi
1f9d1ff1c3 drm/amdkfd: Fix kernel warning during topology setup
This patch fixes the following kernel warning seen during
driver load by correctly initializing the p2plink attr before
creating the sysfs file:

[  +0.002865] ------------[ cut here ]------------
[  +0.002327] kobject: '(null)' (0000000056260cfb): is not initialized, yet kobject_put() is being called.
[  +0.004780] WARNING: CPU: 32 PID: 1006 at lib/kobject.c:718 kobject_put+0xaa/0x1c0
[  +0.001361] Call Trace:
[  +0.001234]  <TASK>
[  +0.001067]  kfd_remove_sysfs_node_entry+0x24a/0x2d0 [amdgpu]
[  +0.003147]  kfd_topology_update_sysfs+0x3d/0x750 [amdgpu]
[  +0.002890]  kfd_topology_add_device+0xbd7/0xc70 [amdgpu]
[  +0.002844]  ? lock_release+0x13c/0x2e0
[  +0.001936]  ? smu_cmn_send_smc_msg_with_param+0x1e8/0x2d0 [amdgpu]
[  +0.003313]  ? amdgpu_dpm_get_mclk+0x54/0x60 [amdgpu]
[  +0.002703]  kgd2kfd_device_init.cold+0x39f/0x4ed [amdgpu]
[  +0.002930]  amdgpu_amdkfd_device_init+0x13d/0x1f0 [amdgpu]
[  +0.002944]  amdgpu_device_init.cold+0x1464/0x17b4 [amdgpu]
[  +0.002970]  ? pci_bus_read_config_word+0x43/0x80
[  +0.002380]  amdgpu_driver_load_kms+0x15/0x100 [amdgpu]
[  +0.002744]  amdgpu_pci_probe+0x147/0x370 [amdgpu]
[  +0.002522]  local_pci_probe+0x40/0x80
[  +0.001896]  work_for_cpu_fn+0x10/0x20
[  +0.001892]  process_one_work+0x26e/0x5a0
[  +0.002029]  worker_thread+0x1fd/0x3e0
[  +0.001890]  ? process_one_work+0x5a0/0x5a0
[  +0.002115]  kthread+0xea/0x110
[  +0.001618]  ? kthread_complete_and_exit+0x20/0x20
[  +0.002422]  ret_from_fork+0x1f/0x30
[  +0.001808]  </TASK>
[  +0.001103] irq event stamp: 59837
[  +0.001718] hardirqs last  enabled at (59849): [<ffffffffb30fab12>] __up_console_sem+0x52/0x60
[  +0.004414] hardirqs last disabled at (59860): [<ffffffffb30faaf7>] __up_console_sem+0x37/0x60
[  +0.004414] softirqs last  enabled at (59654): [<ffffffffb307d9c7>] irq_exit_rcu+0xd7/0x130
[  +0.004205] softirqs last disabled at (59649): [<ffffffffb307d9c7>] irq_exit_rcu+0xd7/0x130
[  +0.004203] ---[ end trace 0000000000000000 ]---

Fixes: 0f28cca87e ("drm/amdkfd: Extend KFD device topology to surface peer-to-peer links")
Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2023-01-03 16:48:52 -05:00
Zev Weiss
2fbb848b65 hwmon: (nct6775) Fix incorrect parenthesization in nct6775_write_fan_div()
Commit 4ef2774511 ("hwmon: (nct6775) Convert register access to
regmap API") fumbled the shifting & masking of the fan_div values such
that odd-numbered fan divisors would always be set to zero.  Fix it so
that we actually OR in the bits we meant to.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Fixes: 4ef2774511 ("hwmon: (nct6775) Convert register access to regmap API")
Cc: stable@kernel.org # v5.19+
Link: https://lore.kernel.org/r/20230102212857.5670-1-zev@bewilderbeest.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-01-03 13:26:45 -08:00
Armin Wolf
ca8fd8c16a hwmon: (ftsteutates) Fix scaling of measurements
A user complained that the ftsteutates driver was displaying
bogus values since its introduction. This happens because the
sensor measurements need to be scaled in order to produce
meaningful results:
- the fan speed needs to be multiplied by 60 since its in RPS
- the temperature is in degrees celsius and needs an offset of 64
- the voltage is in 1/256 of 3.3V

The offical datasheet says the voltage needs to be divided by 256,
but this is likely an off-by-one-error, since even the BIOS
devides by 255 (otherwise 3.3V could not be measured).

The voltage channels additionally need a board-specific multiplier,
however this can be done by the driver since its board-specific.

The reason the missing scaling of measurements is the way Fujitsu
used this driver when it was still out-of-tree. Back then, all
scaling was done in userspace by libsensors, even the generic one.

Tested on a Fujitsu DS3401-B1.

Fixes: 08426eda58 ("hwmon: Add driver for FTS BMC chip "Teutates"")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20221224041855.83981-2-W_Armin@gmx.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-01-03 13:26:45 -08:00
Daniel Vetter
c8de526215 The drm-misc-next-fixes leftovers. It addresses a bug in drm/scheduler
ending up causing a lockup, and reduces the stack usage of some drm/mm
 kunit tests.
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Merge tag 'drm-misc-next-fixes-2023-01-03' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Maxime writes:

"The drm-misc-next-fixes leftovers. It addresses a bug in drm/scheduler
ending up causing a lockup, and reduces the stack usage of some drm/mm
kunit tests."

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20230103144926.bmjjni3xnuis2jmq@houat
2023-01-03 21:02:57 +01:00
Maíra Canal
a53be8dae8 drm/v3d: replace open-coded implementation of drm_gem_object_lookup
As v3d_submit_tfu_ioctl() performs the same steps as
drm_gem_object_lookup(), replace the open-code implementation in v3d
with its DRM core equivalent.

Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221227200010.191351-1-mcanal@igalia.com
2023-01-03 18:16:01 -01:00
Miquel Raynal
57588c7117 mac802154: Handle passive scanning
Implement the core hooks in order to provide the softMAC layer support
for passive scans. Scans are requested by the user and can be aborted.

Changing channels manually is prohibited during scans.

The implementation uses a workqueue triggered at a certain interval
depending on the symbol duration for the current channel and the
duration order provided. More advanced drivers with internal scheduling
capabilities might require additional care but there is none mainline
yet.

Received beacons during a passive scan are processed in a work queue and
their result forwarded to the upper layer.

Active scanning is not supported yet.

Co-developed-by: David Girault <david.girault@qorvo.com>
Signed-off-by: David Girault <david.girault@qorvo.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-7-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2023-01-03 19:48:43 +01:00
Thomas Richter
d8d85ce86d perf lock contention: Fix core dump related to not finding the "__sched_text_end" symbol on s/390
The test case perf lock contention dumps core on s390. Run the following
commands:

  # ./perf lock record -- ./perf bench sched messaging
  # Running 'sched/messaging' benchmark:
  # 20 sender and receiver processes per group
  # 10 groups == 400 processes run

      Total time: 2.799 [sec]
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.073 MB perf.data (100 samples) ]
  #
  # ./perf lock contention
  Segmentation fault (core dumped)
  #

The function call stack is lengthy, here are the top 5 functions:

  # gdb ./perf core.24048
  GNU gdb (GDB) Fedora Linux 12.1-6.fc37
  Core was generated by `./perf lock contention'.
  Program terminated with signal SIGSEGV, Segmentation fault.
  #0  0x00000000011dd25c in machine__is_lock_function (machine=0x3029e28, addr=1789230) at util/machine.c:3356
         3356 machine->sched.text_end = kmap->unmap_ip(kmap, sym->start);

 (gdb) where
  #0  0x00000000011dd25c in machine__is_lock_function (machine=0x3029e28, addr=1789230) at util/machine.c:3356
  #1  0x000000000109f244 in callchain_id (evsel=0x30313e0, sample=0x3ffea4f77d0) at builtin-lock.c:957
  #2  0x000000000109e094 in get_key_by_aggr_mode (key=0x3ffea4f7290, addr=27758136, evsel=0x30313e0, sample=0x3ffea4f77d0) at builtin-lock.c:586
  #3  0x000000000109f4d0 in report_lock_contention_begin_event (evsel=0x30313e0, sample=0x3ffea4f77d0) at builtin-lock.c:1004
  #4  0x00000000010a00ae in evsel__process_contention_begin (evsel=0x30313e0, sample=0x3ffea4f77d0) at builtin-lock.c:1254
  #5  0x00000000010a0e14 in process_sample_event (tool=0x3ffea4f8480, event=0x3ff85601ef8, sample=0x3ffea4f77d0, evsel=0x30313e0, machine=0x3029e28) at builtin-lock.c:1464
  .....

The issue is in function machine__is_lock_function() in file
./util/machine.c lines 3355:

   /* should not fail from here */
   sym = machine__find_kernel_symbol_by_name(machine, "__sched_text_end", &kmap);
   machine->sched.text_end = kmap->unmap_ip(kmap, sym->start)

On s390 the symbol __sched_text_end is *NOT* in the symbol list and the
resulting pointer sym is set to NULL. The sym->start is then a NULL pointer
access and generates the core dump.

The reason why __sched_text_end is not in the symbol list on s390 is
simple:

When the symbol list is created at perf start up with function calls

  dso__load
  +--> dso__load_vmlinux_path
       +--> dso__load_vmlinux
            +--> dso__load_sym
	         +--> dso__load_sym_internal (reads kernel symbols)
		 +--> symbols__fixup_end
		 +--> symbols__fixup_duplicate

The issue is in function symbols__fixup_duplicate(). It deletes all
symbols with have the same address. On s390:

  # nm -g  ~/linux/vmlinux| fgrep c68390
  0000000000c68390 T __cpuidle_text_start
  0000000000c68390 T __sched_text_end
  #

two symbols have identical addresses and __sched_text_end is considered
duplicate (in ascending sort order) and removed from the symbol list.
Therefore it is missing and an invalid pointer reference occurs.  The
code checks for symbol __sched_text_start and when it exists assumes
symbol __sched_text_end is also in the symbol table. However this is not
the case on s390.

Same situation exists for symbol __lock_text_start:

0000000000c68770 T __cpuidle_text_end
0000000000c68770 T __lock_text_start

This symbol is also removed from the symbol table but used in function
machine__is_lock_function().

To fix this and keep duplicate symbols in the symbol table, set
symbol_conf.allow_aliases to true. This prevents the removal of
duplicate symbols in function symbols__fixup_duplicate().

Output After:

 # ./perf lock contention
 contended total wait  max wait  avg wait    type   caller

        48   124.39 ms 123.99 ms   2.59 ms rwsem:W unlink_anon_vmas+0x24a
        47    83.68 ms  83.26 ms   1.78 ms rwsem:W free_pgtables+0x132
         5    41.22 us  10.55 us   8.24 us rwsem:W free_pgtables+0x140
         4    40.12 us  20.55 us  10.03 us rwsem:W copy_process+0x1ac8
 #

Fixes: 0d2997f750 ("perf lock: Look up callchain for the contended locks")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: https://lore.kernel.org/r/20221230102627.2410847-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-01-03 15:48:23 -03:00
Miquel Raynal
dd18096256 mac802154: Add MLME Tx locked helpers
These have the exact same behavior as before, except they expect the
rtnl to be already taken (and will complain otherwise). This allows
performing MLME transmissions from different contexts.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-6-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2023-01-03 19:45:44 +01:00
Miquel Raynal
5755cd4d94 mac802154: Prepare forcing specific symbol duration
The scan logic will bypass the whole ->set_channel() logic from the top
by calling the driver hook to just switch between channels when
required.

We can no longer rely on the "current" page/channel settings to set the
right symbol duration. Let's add these as new parameters to allow
providing the page/channel couple that we want.

There is no functional change.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-5-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2023-01-03 19:41:16 +01:00
Miquel Raynal
d2aaf2a017 ieee802154: Introduce a helper to validate a channel
This helper for now only checks if the page member and channel member
are valid (in the specification range) and supported (by checking the
device capabilities). Soon two new parameters will be introduced and
having this helper will let us only modify its content rather than
modifying the logic everywhere else in the subsystem.

There is not functional change.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-4-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2023-01-03 19:36:53 +01:00
Ian Rogers
f89fb55714 perf build: Don't propagate subdir to submakes for install_headers
subdir is added to the OUTPUT which fails as part of building
install_headers when passed from "make -C tools perf_install".

Committer testing:

The original reporter (see the Link: below) had trouble with this:

$ make -C tools perf_install

That ended up with errors like this:

  /var/home/acme/git/perf-urgent/tools/scripts/Makefile.include:17: *** output directory "/var/home/acme/git/perf-urgent/tools/perf/libperf/perf/" does not exist.  Stop.

With this patch applied we now get it installed at:

  INSTALL /var/home/acme/git/perf-urgent/tools/perf/libperf/include/perf/bpf_perf.h

As expected:

  $ ls -la /var/home/acme/git/perf-urgent/tools/perf/libperf/include/perf/bpf_perf.h
  -rw-r--r--. 1 acme acme 1146 Jan  3 15:42 /var/home/acme/git/perf-urgent/tools/perf/libperf/include/perf/bpf_perf.h

And if we clean tools with:

  $ make -C tools clean

it gets cleaned up:

  $ ls -la /var/home/acme/git/perf-urgent/tools/perf/libperf/include/perf/bpf_perf.h
  ls: cannot access '/var/home/acme/git/perf-urgent/tools/perf/libperf/include/perf/bpf_perf.h': No such file or directory
  $

Fixes: 746bd29e34 ("perf build: Use tools/lib headers from install path")
Reported-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/fa4b3115-d555-3d7f-54d1-018002e99350@secunet.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-01-03 15:35:01 -03:00
Miquel Raynal
44def58f58 ieee802154: Define a beacon frame header
This definition will be used when adding support for scanning and defines
the content of a beacon frame header as in the 802.15.4 specification.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-3-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2023-01-03 19:34:30 +01:00
Miquel Raynal
ed3557c947 ieee802154: Add support for user scanning requests
The ieee802154 layer should be able to scan a set of channels in order
to look for beacons advertizing PANs. Supporting this involves adding
two user commands: triggering scans and aborting scans. The user should
also be notified when a new beacon is received and also upon scan
termination.

A scan request structure is created to list the requirements and to be
accessed asynchronously when changing channels or receiving beacons.

Mac layers may now implement the ->trigger_scan() and ->abort_scan()
hooks.

Co-developed-by: David Girault <david.girault@qorvo.com>
Signed-off-by: David Girault <david.girault@qorvo.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-2-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2023-01-03 19:31:03 +01:00
Li zeming
e195605ed2 xfs: xfs_qm: remove unnecessary ‘0’ values from error
error is assigned first, so it does not need to initialize the
assignment.

Signed-off-by: Li zeming <zeming@nfschina.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
2023-01-03 10:23:07 -08:00
Wu Guanghao
4da112513c xfs: Fix deadlock on xfs_inodegc_worker
We are doing a test about deleting a large number of files
when memory is low. A deadlock problem was found.

[ 1240.279183] -> #1 (fs_reclaim){+.+.}-{0:0}:
[ 1240.280450]        lock_acquire+0x197/0x460
[ 1240.281548]        fs_reclaim_acquire.part.0+0x20/0x30
[ 1240.282625]        kmem_cache_alloc+0x2b/0x940
[ 1240.283816]        xfs_trans_alloc+0x8a/0x8b0
[ 1240.284757]        xfs_inactive_ifree+0xe4/0x4e0
[ 1240.285935]        xfs_inactive+0x4e9/0x8a0
[ 1240.286836]        xfs_inodegc_worker+0x160/0x5e0
[ 1240.287969]        process_one_work+0xa19/0x16b0
[ 1240.289030]        worker_thread+0x9e/0x1050
[ 1240.290131]        kthread+0x34f/0x460
[ 1240.290999]        ret_from_fork+0x22/0x30
[ 1240.291905]
[ 1240.291905] -> #0 ((work_completion)(&gc->work)){+.+.}-{0:0}:
[ 1240.293569]        check_prev_add+0x160/0x2490
[ 1240.294473]        __lock_acquire+0x2c4d/0x5160
[ 1240.295544]        lock_acquire+0x197/0x460
[ 1240.296403]        __flush_work+0x6bc/0xa20
[ 1240.297522]        xfs_inode_mark_reclaimable+0x6f0/0xdc0
[ 1240.298649]        destroy_inode+0xc6/0x1b0
[ 1240.299677]        dispose_list+0xe1/0x1d0
[ 1240.300567]        prune_icache_sb+0xec/0x150
[ 1240.301794]        super_cache_scan+0x2c9/0x480
[ 1240.302776]        do_shrink_slab+0x3f0/0xaa0
[ 1240.303671]        shrink_slab+0x170/0x660
[ 1240.304601]        shrink_node+0x7f7/0x1df0
[ 1240.305515]        balance_pgdat+0x766/0xf50
[ 1240.306657]        kswapd+0x5bd/0xd20
[ 1240.307551]        kthread+0x34f/0x460
[ 1240.308346]        ret_from_fork+0x22/0x30
[ 1240.309247]
[ 1240.309247] other info that might help us debug this:
[ 1240.309247]
[ 1240.310944]  Possible unsafe locking scenario:
[ 1240.310944]
[ 1240.312379]        CPU0                    CPU1
[ 1240.313363]        ----                    ----
[ 1240.314433]   lock(fs_reclaim);
[ 1240.315107]                                lock((work_completion)(&gc->work));
[ 1240.316828]                                lock(fs_reclaim);
[ 1240.318088]   lock((work_completion)(&gc->work));
[ 1240.319203]
[ 1240.319203]  *** DEADLOCK ***
...
[ 2438.431081] Workqueue: xfs-inodegc/sda xfs_inodegc_worker
[ 2438.432089] Call Trace:
[ 2438.432562]  __schedule+0xa94/0x1d20
[ 2438.435787]  schedule+0xbf/0x270
[ 2438.436397]  schedule_timeout+0x6f8/0x8b0
[ 2438.445126]  wait_for_completion+0x163/0x260
[ 2438.448610]  __flush_work+0x4c4/0xa40
[ 2438.455011]  xfs_inode_mark_reclaimable+0x6ef/0xda0
[ 2438.456695]  destroy_inode+0xc6/0x1b0
[ 2438.457375]  dispose_list+0xe1/0x1d0
[ 2438.458834]  prune_icache_sb+0xe8/0x150
[ 2438.461181]  super_cache_scan+0x2b3/0x470
[ 2438.461950]  do_shrink_slab+0x3cf/0xa50
[ 2438.462687]  shrink_slab+0x17d/0x660
[ 2438.466392]  shrink_node+0x87e/0x1d40
[ 2438.467894]  do_try_to_free_pages+0x364/0x1300
[ 2438.471188]  try_to_free_pages+0x26c/0x5b0
[ 2438.473567]  __alloc_pages_slowpath.constprop.136+0x7aa/0x2100
[ 2438.482577]  __alloc_pages+0x5db/0x710
[ 2438.485231]  alloc_pages+0x100/0x200
[ 2438.485923]  allocate_slab+0x2c0/0x380
[ 2438.486623]  ___slab_alloc+0x41f/0x690
[ 2438.490254]  __slab_alloc+0x54/0x70
[ 2438.491692]  kmem_cache_alloc+0x23e/0x270
[ 2438.492437]  xfs_trans_alloc+0x88/0x880
[ 2438.493168]  xfs_inactive_ifree+0xe2/0x4e0
[ 2438.496419]  xfs_inactive+0x4eb/0x8b0
[ 2438.497123]  xfs_inodegc_worker+0x16b/0x5e0
[ 2438.497918]  process_one_work+0xbf7/0x1a20
[ 2438.500316]  worker_thread+0x8c/0x1060
[ 2438.504938]  ret_from_fork+0x22/0x30

When the memory is insufficient, xfs_inonodegc_worker will trigger memory
reclamation when memory is allocated, then flush_work() may be called to
wait for the work to complete. This causes a deadlock.

So use memalloc_nofs_save() to avoid triggering memory reclamation in
xfs_inodegc_worker.

Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
2023-01-03 10:23:07 -08:00
Hironori Shiina
817644fa45 xfs: get root inode correctly at bulkstat
The root inode number should be set to `breq->startino` for getting stat
information of the root when XFS_BULK_IREQ_SPECIAL_ROOT is used.
Otherwise, the inode search is started from 1
(XFS_BULK_IREQ_SPECIAL_ROOT) and the inode with the lowest number in a
filesystem is returned.

Fixes: bf3cb39447 ("xfs: allow single bulkstat of special inodes")
Signed-off-by: Hironori Shiina <shiina.hironori@fujitsu.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
2023-01-03 10:23:07 -08:00
Darrick J. Wong
c0f399ff51 xfs: fix off-by-one error in xfs_btree_space_to_height
Lately I've been stress-testing extreme-sized rmap btrees by using the
(new) xfs_db bmap_inflate command to clone bmbt mappings billions of
times and then using xfs_repair to build new rmap and refcount btrees.
This of course is /much/ faster than actually FICLONEing a file billions
of times.

Unfortunately, xfs_repair fails in xfs_btree_bload_compute_geometry with
EOVERFLOW, which indicates that xfs_mount.m_rmap_maxlevels is not
sufficiently large for the test scenario.  For a 1TB filesystem (~67
million AG blocks, 4 AGs) the btheight command reports:

$ xfs_db -c 'btheight -n 4400801200 -w min rmapbt' /dev/sda
rmapbt: worst case per 4096-byte block: 84 records (leaf) / 45 keyptrs (node)
level 0: 4400801200 records, 52390491 blocks
level 1: 52390491 records, 1164234 blocks
level 2: 1164234 records, 25872 blocks
level 3: 25872 records, 575 blocks
level 4: 575 records, 13 blocks
level 5: 13 records, 1 block
6 levels, 53581186 blocks total

The AG is sufficiently large to build this rmap btree.  Unfortunately,
m_rmap_maxlevels is 5.  Augmenting the loop in the space->height
function to report height, node blocks, and blocks remaining produces
this:

ht 1 node_blocks 45 blockleft 67108863
ht 2 node_blocks 2025 blockleft 67108818
ht 3 node_blocks 91125 blockleft 67106793
ht 4 node_blocks 4100625 blockleft 67015668
final height: 5

The goal of this function is to compute the maximum height btree that
can be stored in the given number of ondisk fsblocks.  Starting with the
top level of the tree, each iteration through the loop adds the fanout
factor of the next level down until we run out of blocks.  IOWs, maximum
height is achieved by using the smallest fanout factor that can apply
to that level.

However, the loop setup is not correct.  Top level btree blocks are
allowed to contain fewer than minrecs items, so the computation is
incorrect because the first time through the loop it should be using a
fanout factor of 2.  With this corrected, the above becomes:

ht 1 node_blocks 2 blockleft 67108863
ht 2 node_blocks 90 blockleft 67108861
ht 3 node_blocks 4050 blockleft 67108771
ht 4 node_blocks 182250 blockleft 67104721
ht 5 node_blocks 8201250 blockleft 66922471
final height: 6

Fixes: 9ec691205e ("xfs: compute the maximum height of the rmap btree when reflink enabled")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
2023-01-03 10:23:07 -08:00
Chris Wilson
c07311b550 perf/x86/rapl: Treat Tigerlake like Icelake
Since Tigerlake seems to have inherited its cstates and other RAPL power
caps from Icelake, assume it also follows Icelake for its RAPL events.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20221228113454.1199118-1-rodrigo.vivi@intel.com
2023-01-03 18:55:35 +01:00
Anuradha Weeraman
65c24d7b0f x86/lib: Fix compiler and kernel-doc warnings
Fix the following W=1 warnings:

arch/x86/lib/cmdline.c:

  - Include <asm/cmdline.h> to fix missing-prototypes warnings.

  - Update comment for __cmdline_find_option_bool to fix a kernel-doc warning.

Signed-off-by: Anuradha Weeraman <anuradha@debian.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230103114725.108431-1-anuradha@debian.org
2023-01-03 18:46:21 +01:00
Jason A. Donenfeld
72bb8f8cc0 x86/insn: Avoid namespace clash by separating instruction decoder MMIO type from MMIO trace type
Both <linux/mmiotrace.h> and <asm/insn-eval.h> define various MMIO_ enum constants,
whose namespace overlaps.

Rename the <asm/insn-eval.h> ones to have a INSN_ prefix, so that the headers can be
used from the same source file.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230101162910.710293-2-Jason@zx2c4.com
2023-01-03 18:46:06 +01:00
Muhammad Husaini Zulkifli
1d1b4c63ba igc: Remove reset adapter task for i226 during disable tsn config
I225 have limitation when programming the BaseTime register which required
a power cycle of the controller. This limitation already lifted in I226.
This patch removes the restriction so that when user configure/remove any
TSN mode, it would not go into power cycle reset adapter.

How to test:

Schedule any gate control list configuration or delete it.

Example:

1)

BASE_TIME=$(date +%s%N)
tc qdisc replace dev $interface_name parent root handle 100 taprio \
    num_tc 4 \
    map 3 1 0 2 3 3 3 3 3 3 3 3 3 3 3 3 \
    queues 1@0 1@1 1@2 1@3 \
    base-time $BASE_TIME \
    sched-entry S 0F 1000000 \
    flags 0x2

2) tc qdisc del dev $intername_name root

Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2023-01-03 09:36:25 -08:00
Tan Tee Min
5ac1231ac1 igc: enable Qbv configuration for 2nd GCL
Make reset task only executes for i225 and Qbv disabling to allow
i226 configure for 2nd GCL without resetting the adapter.

In i226, Tx won't hang if there is a GCL is already running, so in
this case we don't need to set FutScdDis bit.

Signed-off-by: Tan Tee Min <tee.min.tan@linux.intel.com>
Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2023-01-03 09:36:17 -08:00
Muhammad Husaini Zulkifli
b8897dc54e igc: remove I226 Qbv BaseTime restriction
Remove the Qbv BaseTime restriction for I226 so that the BaseTime can be
scheduled to the future time. A new register bit of Tx Qav Control
(Bit-7: FutScdDis) was introduced to allow I226 scheduling future time as
Qbv BaseTime and not having the Tx hang timeout issue.

Besides, according to datasheet section 7.5.2.9.3.3, FutScdDis bit has to
be configured first before the cycle time and base time.

Indeed the FutScdDis bit is only active on re-configuration, thus we have
to set the BASET_L to zero and then only set it to the desired value.

Please also note that the Qbv configuration flow is moved around based on
the Qbv programming guideline that is documented in the latest datasheet.

Co-developed-by: Tan Tee Min <tee.min.tan@linux.intel.com>
Signed-off-by: Tan Tee Min <tee.min.tan@linux.intel.com>
Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2023-01-03 09:35:37 -08:00
Tvrtko Ursulin
723dad977a drm: Replace DRM_DEBUG with drm_dbg_core in file and ioctl handling
Replace the deprecated macro with the per-device one.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20221223112302.320097-1-tvrtko.ursulin@linux.intel.com
2023-01-03 18:20:57 +01:00
Brent Lu
03178b4f7e
ASoC: Intel: sof_ssp_amp: remove unused variable
The variable becomes useless since we moved the snd_soc_jack
structure from a static array to sof_hdmi_pcm structure.

Signed-off-by: Brent Lu <brent.lu@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230103073704.722027-1-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-01-03 17:01:22 +00:00
Jaegeuk Kim
df9d44b645 f2fs: let's avoid panic if extent_tree is not created
This patch avoids the below panic.

pc : __lookup_extent_tree+0xd8/0x760
lr : f2fs_do_write_data_page+0x104/0x87c
sp : ffffffc010cbb3c0
x29: ffffffc010cbb3e0 x28: 0000000000000000
x27: ffffff8803e7f020 x26: ffffff8803e7ed40
x25: ffffff8803e7f020 x24: ffffffc010cbb460
x23: ffffffc010cbb480 x22: 0000000000000000
x21: 0000000000000000 x20: ffffffff22e90900
x19: 0000000000000000 x18: ffffffc010c5d080
x17: 0000000000000000 x16: 0000000000000020
x15: ffffffdb1acdbb88 x14: ffffff888759e2b0
x13: 0000000000000000 x12: ffffff802da49000
x11: 000000000a001200 x10: ffffff8803e7ed40
x9 : ffffff8023195800 x8 : ffffff802da49078
x7 : 0000000000000001 x6 : 0000000000000000
x5 : 0000000000000006 x4 : ffffffc010cbba28
x3 : 0000000000000000 x2 : ffffffc010cbb480
x1 : 0000000000000000 x0 : ffffff8803e7ed40
Call trace:
 __lookup_extent_tree+0xd8/0x760
 f2fs_do_write_data_page+0x104/0x87c
 f2fs_write_single_data_page+0x420/0xb60
 f2fs_write_cache_pages+0x418/0xb1c
 __f2fs_write_data_pages+0x428/0x58c
 f2fs_write_data_pages+0x30/0x40
 do_writepages+0x88/0x190
 __writeback_single_inode+0x48/0x448
 writeback_sb_inodes+0x468/0x9e8
 __writeback_inodes_wb+0xb8/0x2a4
 wb_writeback+0x33c/0x740
 wb_do_writeback+0x2b4/0x400
 wb_workfn+0xe4/0x34c
 process_one_work+0x24c/0x5bc
 worker_thread+0x3e8/0xa50
 kthread+0x150/0x1b4

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2023-01-03 08:59:06 -08:00
Jaegeuk Kim
22a341b430 f2fs: should use a temp extent_info for lookup
Otherwise, __lookup_extent_tree() will override the given extent_info which will
be used by caller.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2023-01-03 08:59:06 -08:00
Jaegeuk Kim
ed2724765e f2fs: don't mix to use union values in extent_info
Let's explicitly use the defined values in block_age case only.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2023-01-03 08:59:06 -08:00
Jaegeuk Kim
fe59109ae5 f2fs: initialize extent_cache parameter
This can avoid confusing tracepoint values.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2023-01-03 08:59:05 -08:00
Chao Yu
b3d83066cb f2fs: fix to avoid NULL pointer dereference in f2fs_issue_flush()
With below two cases, it will cause NULL pointer dereference when
accessing SM_I(sbi)->fcc_info in f2fs_issue_flush().

a) If kthread_run() fails in f2fs_create_flush_cmd_control(), it will
release SM_I(sbi)->fcc_info,

- mount -o noflush_merge /dev/vda /mnt/f2fs
- mount -o remount,flush_merge /dev/vda /mnt/f2fs  -- kthread_run() fails
- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=1 conv=fsync

b) we will never allocate memory for SM_I(sbi)->fcc_info w/ below
testcase,

- mount -o ro /dev/vda /mnt/f2fs
- mount -o rw,remount /dev/vda /mnt/f2fs
- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=1 conv=fsync

In order to fix this issue, let change as below:
- fix error path handling in f2fs_create_flush_cmd_control().
- allocate SM_I(sbi)->fcc_info even if readonly is on.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2023-01-03 08:58:47 -08:00
Mikulas Patocka
55d235361f x86/asm: Fix an assembler warning with current binutils
Fix a warning: "found `movsd'; assuming `movsl' was meant"

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org
2023-01-03 17:55:11 +01:00
Cristian Marussi
e325285de2 firmware: arm_scmi: Fix virtio channels cleanup on shutdown
When unloading the SCMI core stack module, configured to use the virtio
SCMI transport, LOCKDEP reports the splat down below about unsafe locks
dependencies.

In order to avoid this possible unsafe locking scenario call upfront
virtio_break_device() before getting hold of vioch->lock.

=====================================================
 WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
 6.1.0-00067-g6b934395ba07-dirty #4 Not tainted
 -----------------------------------------------------
 rmmod/307 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
 ffff000080c510e0 (&dev->vqs_list_lock){+.+.}-{3:3}, at: virtio_break_device+0x28/0x68

 and this task is already holding:
 ffff00008288ada0 (&channels[i].lock){-.-.}-{3:3}, at: virtio_chan_free+0x60/0x168 [scmi_module]

 which would create a new lock dependency:
  (&channels[i].lock){-.-.}-{3:3} -> (&dev->vqs_list_lock){+.+.}-{3:3}

 but this new dependency connects a HARDIRQ-irq-safe lock:
  (&channels[i].lock){-.-.}-{3:3}

 ... which became HARDIRQ-irq-safe at:
   lock_acquire+0x128/0x398
   _raw_spin_lock_irqsave+0x78/0x140
   scmi_vio_complete_cb+0xb4/0x3b8 [scmi_module]
   vring_interrupt+0x84/0x120
   vm_interrupt+0x94/0xe8
   __handle_irq_event_percpu+0xb4/0x3d8
   handle_irq_event_percpu+0x20/0x68
   handle_irq_event+0x50/0xb0
   handle_fasteoi_irq+0xac/0x138
   generic_handle_domain_irq+0x34/0x50
   gic_handle_irq+0xa0/0xd8
   call_on_irq_stack+0x2c/0x54
   do_interrupt_handler+0x8c/0x90
   el1_interrupt+0x40/0x78
   el1h_64_irq_handler+0x18/0x28
   el1h_64_irq+0x64/0x68
   _raw_write_unlock_irq+0x48/0x80
   ep_start_scan+0xf0/0x128
   do_epoll_wait+0x390/0x858
   do_compat_epoll_pwait.part.34+0x1c/0xb8
   __arm64_sys_epoll_pwait+0x80/0xd0
   invoke_syscall+0x4c/0x110
   el0_svc_common.constprop.3+0x98/0x120
   do_el0_svc+0x34/0xd0
   el0_svc+0x40/0x98
   el0t_64_sync_handler+0x98/0xc0
   el0t_64_sync+0x170/0x174

 to a HARDIRQ-irq-unsafe lock:
  (&dev->vqs_list_lock){+.+.}-{3:3}

 ... which became HARDIRQ-irq-unsafe at:
 ...
   lock_acquire+0x128/0x398
   _raw_spin_lock+0x58/0x70
   __vring_new_virtqueue+0x130/0x1c0
   vring_create_virtqueue+0xc4/0x2b8
   vm_find_vqs+0x20c/0x430
   init_vq+0x308/0x390
   virtblk_probe+0x114/0x9b0
   virtio_dev_probe+0x1a4/0x248
   really_probe+0xc8/0x3a8
   __driver_probe_device+0x84/0x190
   driver_probe_device+0x44/0x110
   __driver_attach+0x104/0x1e8
   bus_for_each_dev+0x7c/0xd0
   driver_attach+0x2c/0x38
   bus_add_driver+0x1e4/0x258
   driver_register+0x6c/0x128
   register_virtio_driver+0x2c/0x48
   virtio_blk_init+0x70/0xac
   do_one_initcall+0x84/0x420
   kernel_init_freeable+0x2d0/0x340
   kernel_init+0x2c/0x138
   ret_from_fork+0x10/0x20

 other info that might help us debug this:

  Possible interrupt unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   lock(&dev->vqs_list_lock);
                                local_irq_disable();
                                lock(&channels[i].lock);
                                lock(&dev->vqs_list_lock);
   <Interrupt>
     lock(&channels[i].lock);

  *** DEADLOCK ***
================

Fixes: 42e90eb53b ("firmware: arm_scmi: Add a virtio channel refcount")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-6-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2023-01-03 16:50:44 +00:00
Cristian Marussi
9bae076cd4 firmware: arm_scmi: Harden shared memory access in fetch_notification
A misbheaving SCMI platform firmware could reply with out-of-spec
notifications, shorter than the mimimum size comprising a header.

Fixes: d5141f37c4 ("firmware: arm_scmi: Add notifications support in transport layer")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-4-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2023-01-03 16:50:30 +00:00
Cristian Marussi
ad78b81a10 firmware: arm_scmi: Harden shared memory access in fetch_response
A misbheaving SCMI platform firmware could reply with out-of-spec messages,
shorter than the mimimum size comprising a header and a status field.

Harden shmem_fetch_response to properly truncate such a bad messages.

Fixes: 5c8a47a5a9 ("firmware: arm_scmi: Make scmi core independent of the transport type")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2023-01-03 16:50:30 +00:00
Cristian Marussi
f6ca5059dc firmware: arm_scmi: Clear stale xfer->hdr.status
Stale error status reported from a previous message transaction must be
cleared before starting a new transaction to avoid being confusingly
reported in the following SCMI message dump traces.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-2-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2023-01-03 16:50:29 +00:00