kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c, branch v5.13.5

drm/amdgpu: Reset RAS error count and status regs

2021-04-21T01:45:10+00:00

Reset the RAS error count and error status registers after reading to prevent over reporting error counts on Aldebaran. Signed-off-by: Mukul Joshi Reviewed-By: John Clements Signed-off-by: Alex Deucher

drm/amdgpu: fix a error injection failed issue

2021-04-21T01:36:01+00:00

because "sscanf(str, "retire_page")" always return 0, if application use the raw data for error injection, it always wrongly falls into "op == 3". Change to use strstr instead. Signed-off-by: Dennis Li Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Add double-sscanf but invert

2021-04-15T20:32:44+00:00

Add back the double-sscanf so that both decimal and hexadecimal values could be read in, but this time invert the scan so that hexadecimal format with a leading 0x is tried first, and if that fails, then try decimal format. Also use a logical-AND instead of nesting double if-conditional. See commit "drm/amdgpu: Fix a bug for input with double sscanf" Cc: Alexander Deucher Cc: Hawking Zhang Signed-off-by: Luben Tuikov Reviewed-by: John Clements Signed-off-by: Alex Deucher

drm/amdgpu: Fix kernel-doc for the RAS sysfs interface

2021-04-15T20:32:44+00:00

Imporve the kernel-doc for the RAS sysfs interface. Fix the grammar, fix the context. Cc: Alexander Deucher Cc: Hawking Zhang Signed-off-by: Luben Tuikov Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Add bad_page_cnt_threshold to debugfs

2021-04-15T20:32:44+00:00

Add bad_page_cnt_threshold to debugfs, an optional file system used for debugging, for reporting purposes only--it usually matches the size of EEPROM but may be different depending on the "bad_page_threshold" kernel module option. The "bad_page_cnt_threshold" is a dynamically computed value. It depends on three things: the VRAM size; the size of the EEPROM (or the size allocated to the RAS table therein); and the "bad_page_threshold" module parameter. It is a dynamically computed value, when the amdgpu module is run, on which further parameters and logic depend, and as such it is helpful to see the dynamically computed value in debugfs. Cc: Alexander Deucher Cc: Hawking Zhang Signed-off-by: Luben Tuikov Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Fix a bug in checking the result of reserve page

2021-04-15T20:32:44+00:00

Fix if (ret) --> if (!ret), a bug, for "retire_page", which caused the kernel to recall the method with *pos == end of file, and that bounced back with error. On the first run, we advanced *pos, but returned 0 back to fs layer, also a bug. Fix the logic of the check of the result of amdgpu_reserve_page_direct()--it is 0 on success, and non-zero on error, not the other way around. This patch fixes this bug. Cc: Alexander Deucher Cc: John Clements Cc: Hawking Zhang Signed-off-by: Luben Tuikov Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Fix a bug for input with double sscanf

2021-04-15T20:32:44+00:00

Remove double-sscanf to scan for %llu and 0x%llx, as that is not going to work! The %llu will consume the "0" in "0x" of your input, and the hex value you think you're entering will always be 0. That is, a valid hex value can never be consumed. On the other hand, just entering a hex number without leading 0x will either be scanned as a string and not match, for instance FAB123, or the leading decimal portion is scanned as the %llu, for instance 123FAB will be scanned as 123, which is not correct. Thus remove the first %llu scan and leave only the %llx scan, removing the leading 0x since %llx can scan either. Addresses are usually always hex values, so this suffices. Cc: Alexander Deucher Cc: Xinhui Pan Cc: Hawking Zhang Signed-off-by: Luben Tuikov Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: page retire over debugfs mechanism

2021-04-09T20:58:28+00:00

added support in RAS debugfs to add bad page for isolated page retirement testing Reviewed-by: Hawking Zhang Signed-off-by: John Clements Signed-off-by: Alex Deucher

drm/amdgpu: RAS harvest on driver load

2021-04-09T20:54:51+00:00

In event of RAS UE + warm reset, error counters shall be harvested and cleared on driver load Reviewed-by: Hawking Zhang Signed-off-by: John Clements Signed-off-by: Alex Deucher

drm/amdgpu: split gfx callbacks into ras and non-ras ones

2021-04-09T20:51:22+00:00

gfx ras is only available in cerntain ip generations. Signed-off-by: Hawking Zhang Reviewed-by: Dennis Li Reviewed-by: John Clements Signed-off-by: Alex Deucher