diff options
| author |   Alex Sierra <alex.sierra@amd.com> | 2019-12-19 23:40:19 -0600 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2020-01-16 13:34:27 -0500 |
| commit | ea930000a6dcd161346c957545f7e67b3f77ec06 (patch) | |
| tree | ea8fab2ff16ba75dee40a4fb49ed5b9942a5dec6 /drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | |
| parent | drm/amdgpu: replace kcq enable/disable functions on gfx_v9 (diff) | |
| download | linux-dev-ea930000a6dcd161346c957545f7e67b3f77ec06.tar.xz linux-dev-ea930000a6dcd161346c957545f7e67b3f77ec06.zip | |
drm/amdgpu: export function to flush TLB via pasid
This can be used directly from amdgpu and amdkfd to invalidate
TLB through pasid.
It supports gmc v7, v8, v9 and v10.
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c index f08e5330642d..19d5b133e1d7 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c @@ -418,6 +418,38 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev) return 0; } +/** + * gmc_v7_0_flush_gpu_tlb_pasid - tlb flush via pasid + * + * @adev: amdgpu_device pointer + * @pasid: pasid to be flush + * + * Flush the TLB for the requested pasid. + */ +static int gmc_v7_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev, + uint16_t pasid, uint32_t flush_type, + bool all_hub) +{ + int vmid; + unsigned int tmp; + + if (adev->in_gpu_reset) + return -EIO; + + for (vmid = 1; vmid < 16; vmid++) { + + tmp = RREG32(mmATC_VMID0_PASID_MAPPING + vmid); + if ((tmp & ATC_VMID0_PASID_MAPPING__VALID_MASK) && + (tmp & ATC_VMID0_PASID_MAPPING__PASID_MASK) == pasid) { + WREG32(mmVM_INVALIDATE_REQUEST, 1 << vmid); + RREG32(mmVM_INVALIDATE_RESPONSE); + break; + } + } + + return 0; +} + /* * GART * VMID 0 is the physical GPU addresses as used by the kernel. @@ -1333,6 +1365,7 @@ static const struct amd_ip_funcs gmc_v7_0_ip_funcs = { static const struct amdgpu_gmc_funcs gmc_v7_0_gmc_funcs = { .flush_gpu_tlb = gmc_v7_0_flush_gpu_tlb, + .flush_gpu_tlb_pasid = gmc_v7_0_flush_gpu_tlb_pasid, .emit_flush_gpu_tlb = gmc_v7_0_emit_flush_gpu_tlb, .emit_pasid_mapping = gmc_v7_0_emit_pasid_mapping, .set_prt = gmc_v7_0_set_prt, |