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| author | Lijo Lazar <lijo.lazar@amd.com> | 2026-03-27 10:43:00 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-04-03 20:51:54 +0300 |
| commit | f2275ea90be581f599e7c88a9dbfc5dd4383087d (patch) | |
| tree | c7a1b3aac6e1f86711e7dd462fee18be7541474f | |
| parent | 1d0a26cf37c1b2e9928d2b61af6f282232b5daea (diff) | |
| download | linux-f2275ea90be581f599e7c88a9dbfc5dd4383087d.tar.xz | |
drm/amd/pm: Add smu vram copy function
Add a wrapper function for copying data/to from vram. This additionally
checks for any RAS fatal error. Copy cannot be trusted if any RAS fatal
error happened as VRAM becomes inaccessible.
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c | 12 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h | 3 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c index 7bd8c435466a..006ef585a377 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c @@ -1104,6 +1104,18 @@ int smu_cmn_update_table(struct smu_context *smu, return 0; } +int smu_cmn_vram_cpy(struct smu_context *smu, void *dst, const void *src, + size_t len) +{ + memcpy(dst, src, len); + + /* Don't trust the copy operation if RAS fatal error happened. */ + if (amdgpu_ras_get_fed_status(smu->adev)) + return -EHWPOISON; + + return 0; +} + int smu_cmn_write_watermarks_table(struct smu_context *smu) { void *watermarks_table = smu->smu_table.watermarks_table; diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h index b76e86df5da7..d129907535bd 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h +++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h @@ -174,6 +174,9 @@ int smu_cmn_update_table(struct smu_context *smu, void *table_data, bool drv2smu); +int smu_cmn_vram_cpy(struct smu_context *smu, void *dst, + const void *src, size_t len); + int smu_cmn_write_watermarks_table(struct smu_context *smu); int smu_cmn_write_pptable(struct smu_context *smu); |