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| author | Evan Quan <evan.quan@amd.com> | 2020-07-24 18:39:33 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-08-06 15:44:06 -0400 |
| commit | e4c9200df51033e2394c165fdafb183dbd6100ab (patch) | |
| tree | ff87b9fc997d54b4b29be08b84ae094ba59b5903 /drivers/gpu/drm/amd/powerplay/smu_v11_0.c | |
| parent | 25c933b1c4fcfaa65ed735e9782fdb2622f7b7e8 (diff) | |
| download | linux-e4c9200df51033e2394c165fdafb183dbd6100ab.tar.bz2 | |
drm/amd/powerplay: implement SMU V11 common APIs for retrieving link speed/width
This will be shared around all SMU V11 asics.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/powerplay/smu_v11_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/powerplay/smu_v11_0.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c index 7d7de854a826..ff90e20eed5c 100644 --- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c +++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c @@ -67,6 +67,19 @@ MODULE_FIRMWARE("amdgpu/navy_flounder_smc.bin"); #define SMU11_MODE1_RESET_WAIT_TIME_IN_MS 500 //500ms +#define LINK_WIDTH_MAX 6 +#define LINK_SPEED_MAX 3 + +#define smnPCIE_LC_LINK_WIDTH_CNTL 0x11140288 +#define PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD_MASK 0x00000070L +#define PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD__SHIFT 0x4 +#define smnPCIE_LC_SPEED_CNTL 0x11140290 +#define PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE_MASK 0xC000 +#define PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE__SHIFT 0xE + +static int link_width[] = {0, 1, 2, 4, 8, 12, 16}; +static int link_speed[] = {25, 50, 80, 160}; + int smu_v11_0_init_microcode(struct smu_context *smu) { struct amdgpu_device *adev = smu->adev; @@ -1918,3 +1931,43 @@ int smu_v11_0_get_dpm_level_range(struct smu_context *smu, return ret; } + +int smu_v11_0_get_current_pcie_link_width_level(struct smu_context *smu) +{ + struct amdgpu_device *adev = smu->adev; + + return (RREG32_PCIE(smnPCIE_LC_LINK_WIDTH_CNTL) & + PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD_MASK) + >> PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD__SHIFT; +} + +int smu_v11_0_get_current_pcie_link_width(struct smu_context *smu) +{ + uint32_t width_level; + + width_level = smu_v11_0_get_current_pcie_link_width_level(smu); + if (width_level > LINK_WIDTH_MAX) + width_level = 0; + + return link_width[width_level]; +} + +int smu_v11_0_get_current_pcie_link_speed_level(struct smu_context *smu) +{ + struct amdgpu_device *adev = smu->adev; + + return (RREG32_PCIE(smnPCIE_LC_SPEED_CNTL) & + PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE_MASK) + >> PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE__SHIFT; +} + +int smu_v11_0_get_current_pcie_link_speed(struct smu_context *smu) +{ + uint32_t speed_level; + + speed_level = smu_v11_0_get_current_pcie_link_speed_level(smu); + if (speed_level > LINK_SPEED_MAX) + speed_level = 0; + + return link_speed[speed_level]; +} |