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| author | Srinivasan Shanmugam <srinivasan.shanmugam@amd.com> | 2025-08-28 16:48:49 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-09-15 23:52:24 +0300 |
| commit | 2a7a794eb82c37014ea95f7f58ebeff73ef72858 (patch) | |
| tree | 2f3e9cdc4379b311ffad5cbb5181d9018a6f3779 /drivers/gpu/drm/amd/amdgpu/amdgpu.h | |
| parent | 9e46b8bb0539d7bc9a9e7b3072fa4f6082490392 (diff) | |
| download | linux-2a7a794eb82c37014ea95f7f58ebeff73ef72858.tar.xz | |
drm/amdgpu/ttm: Allocate/Free 4K MMIO_REMAP Singleton
Add mmio_remap bookkeeping to amdgpu_device and introduce
amdgpu_ttm_mmio_remap_bo_init()/fini() to manage a kernel-owned,
one-page (4K) BO in AMDGPU_GEM_DOMAIN_MMIO_REMAP.
Bookkeeping:
- adev->rmmio_remap.bo : kernel-owned singleton BO
The BO is allocated during TTM init when a remap bus address is available
(adev->rmmio_remap.bus_addr) and PAGE_SIZE <= AMDGPU_GPU_PAGE_SIZE (4K),
and freed during TTM fini.
v2:
- Check mmio_remap bus address (adev->rmmio_remap.bus_addr) instead of
rmmio_base. (Alex)
- Skip quietly if PAGE_SIZE > AMDGPU_GPU_PAGE_SIZE or no bus address
(no warn). (Alex)
- Use `amdgpu_bo_create()` (not *_kernel) - Only with this The object
is stored in adev->mmio_remap.bo and will later be exposed to
userspace via a GEM handle. (Christian)
v3:
- Remove obvious comment before amdgpu_ttm_mmio_remap_bo_fini() call.
(Alex)
v4:
- Squash bookkeeping into this patch (Christian)
Suggested-by: Christian König <christian.koenig@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 0e6a09651bbc..c56839528843 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -752,6 +752,7 @@ typedef void (*amdgpu_block_wreg_t)(struct amdgpu_device*, uint32_t, uint32_t, u struct amdgpu_mmio_remap { u32 reg_offset; resource_size_t bus_addr; + struct amdgpu_bo *bo; }; /* Define the HW IP blocks will be used in driver , add more if necessary */ |