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drm/amdgpu: accommodate DOMAIN/PL_DOORBELL

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This patch adds changes:
- to accommodate the new GEM domain for DOORBELLs
- to accommodate the new TTM PL for DOORBELLs

in order to manage doorbell pages as GEM object.

V2: Addressed reviwe comments from Christian
    - drop the doorbell changes for pinning/unpinning
    - drop the doorbell changes for dma-buf map
    - drop the doorbell changes for sgt
    - no need to handle TTM_PL_FLAG_CONTIGUOUS for doorbell
    - add caching type for doorbell

V3: - Removed unrelated empty line (Christian)
    - Add PL_DOORBELL in mem_type_to_domain() as well (Alex)

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Reviewed-by: Christian Koenig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
This commit is contained in:
Alex Deucher
2023-07-14 15:11:26 +02:00
parent 05c899eacc
commit dc3499c71d
5 changed files with 30 additions and 2 deletions
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16
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@@ -127,6 +127,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
case AMDGPU_PL_GDS:
case AMDGPU_PL_GWS:
case AMDGPU_PL_OA:
case AMDGPU_PL_DOORBELL:
placement->num_placement = 0;
placement->num_busy_placement = 0;
return;
@@ -496,9 +497,11 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
if (old_mem->mem_type == AMDGPU_PL_GDS ||
old_mem->mem_type == AMDGPU_PL_GWS ||
old_mem->mem_type == AMDGPU_PL_OA ||
old_mem->mem_type == AMDGPU_PL_DOORBELL ||
new_mem->mem_type == AMDGPU_PL_GDS ||
new_mem->mem_type == AMDGPU_PL_GWS ||
new_mem->mem_type == AMDGPU_PL_OA) {
new_mem->mem_type == AMDGPU_PL_OA ||
new_mem->mem_type == AMDGPU_PL_DOORBELL) {
/* Nothing to save here */
ttm_bo_move_null(bo, new_mem);
goto out;
@@ -582,6 +585,12 @@ static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev,
mem->bus.offset += adev->gmc.aper_base;
mem->bus.is_iomem = true;
break;
case AMDGPU_PL_DOORBELL:
mem->bus.offset = mem->start << PAGE_SHIFT;
mem->bus.offset += adev->doorbell.base;
mem->bus.is_iomem = true;
mem->bus.caching = ttm_uncached;
break;
default:
return -EINVAL;
}
@@ -596,6 +605,10 @@ static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
amdgpu_res_first(bo->resource, (u64)page_offset << PAGE_SHIFT, 0,
&cursor);
if (bo->resource->mem_type == AMDGPU_PL_DOORBELL)
return ((uint64_t)(adev->doorbell.base + cursor.start)) >> PAGE_SHIFT;
return (adev->gmc.aper_base + cursor.start) >> PAGE_SHIFT;
}
@@ -1305,6 +1318,7 @@ uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem)
flags |= AMDGPU_PTE_VALID;
if (mem && (mem->mem_type == TTM_PL_TT ||
mem->mem_type == AMDGPU_PL_DOORBELL ||
mem->mem_type == AMDGPU_PL_PREEMPT)) {
flags |= AMDGPU_PTE_SYSTEM;