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| author | Asad Kamal <asad.kamal@amd.com> | 2026-06-23 00:00:00 +0000 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-07-01 11:25:48 -0400 |
| commit | c42871ba4833855fb3ac1cdc586b3c5345d09e5d (patch) | |
| tree | 9a7859b9eb2f2abb1ab039d0a2f100b79c2e9cd0 | |
| parent | 5d3cc8e388464f485d0944b87b8f9426e637d082 (diff) | |
| download | linux-stable-c42871ba4833855fb3ac1cdc586b3c5345d09e5d.tar.gz linux-stable-c42871ba4833855fb3ac1cdc586b3c5345d09e5d.zip | |
drm/amdgpu/pm: add pp_entries_max() helper
Add a static inline that returns the maximum safe record count for a
PowerPlay sub-table, bounded by the lesser of soft_pp_table_size and
adev->bios_size. Uses adev->bios directly to avoid a dependency on
struct atom_context. Subsequent patches use it to clamp ucNumEntries.
Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h index ca71efaa1656..7ebc1344023f 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h +++ b/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h @@ -829,4 +829,21 @@ int smu8_init_function_pointers(struct pp_hwmgr *hwmgr); int vega12_hwmgr_init(struct pp_hwmgr *hwmgr); int vega20_hwmgr_init(struct pp_hwmgr *hwmgr); +static inline uint32_t pp_entries_max(const struct pp_hwmgr *hwmgr, + const void *sub_table, + size_t hdr_size, size_t rec_size) +{ + struct amdgpu_device *adev = (struct amdgpu_device *)hwmgr->adev; + const char *bios_end = (const char *)adev->bios + adev->bios_size; + const char *pp_end = (const char *)hwmgr->soft_pp_table + + hwmgr->soft_pp_table_size; + const char *entries = (const char *)sub_table + hdr_size; + + if (pp_end > bios_end) + return 0; + if (!rec_size || entries >= pp_end) + return 0; + return (uint32_t)((pp_end - entries) / rec_size); +} + #endif /* _HWMGR_H_ */ |