diff options
| author | Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> | 2025-02-04 17:57:47 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-02-12 21:05:49 -0500 |
| commit | 3394b1f76d3f8adf695ceed350a5dae49003eb37 (patch) | |
| tree | 29ef9c4c68f2f6f8834dcc907367bf67ff04b306 /drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c | |
| parent | 53b2e0c24afa4c24a2bf42bc850fe1565d978805 (diff) | |
drm/amdgpu: Set snoop bit for SDMA for MI series
SDMA writes has to probe invalidate RW lines. Set snoop bit in mmhub for
this to happen.
v2: Missed a few mmhub_v9_4. Added now.
v3: Calculate hub offset once since it doesn't change inside the loop
Modified function names based on review comments.
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c index 9689e2b5d4e5..2adee2b94c37 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c @@ -172,6 +172,30 @@ static void mmhub_v1_7_init_tlb_regs(struct amdgpu_device *adev) WREG32_SOC15(MMHUB, 0, regMC_VM_MX_L1_TLB_CNTL, tmp); } +/* Set snoop bit for SDMA so that SDMA writes probe-invalidates RW lines */ +static void mmhub_v1_7_init_snoop_override_regs(struct amdgpu_device *adev) +{ + uint32_t tmp; + int i; + uint32_t distance = regDAGB1_WRCLI_GPU_SNOOP_OVERRIDE - + regDAGB0_WRCLI_GPU_SNOOP_OVERRIDE; + + for (i = 0; i < 5; i++) { /* DAGB instances */ + tmp = RREG32_SOC15_OFFSET(MMHUB, 0, + regDAGB0_WRCLI_GPU_SNOOP_OVERRIDE, i * distance); + tmp |= (1 << 15); /* SDMA client is BIT15 */ + WREG32_SOC15_OFFSET(MMHUB, 0, + regDAGB0_WRCLI_GPU_SNOOP_OVERRIDE, i * distance, tmp); + + tmp = RREG32_SOC15_OFFSET(MMHUB, 0, + regDAGB0_WRCLI_GPU_SNOOP_OVERRIDE_VALUE, i * distance); + tmp |= (1 << 15); + WREG32_SOC15_OFFSET(MMHUB, 0, + regDAGB0_WRCLI_GPU_SNOOP_OVERRIDE_VALUE, i * distance, tmp); + } + +} + static void mmhub_v1_7_init_cache_regs(struct amdgpu_device *adev) { uint32_t tmp; @@ -337,6 +361,7 @@ static int mmhub_v1_7_gart_enable(struct amdgpu_device *adev) mmhub_v1_7_init_system_aperture_regs(adev); mmhub_v1_7_init_tlb_regs(adev); mmhub_v1_7_init_cache_regs(adev); + mmhub_v1_7_init_snoop_override_regs(adev); mmhub_v1_7_enable_system_domain(adev); mmhub_v1_7_disable_identity_aperture(adev); |