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drm/amdgpu: reserve at least 4MB of VRAM for page tables v2

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This hopefully helps reduce the contention for page tables.

v2: adjust maximum reported VRAM size as well

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2019-08-30 14:38:37 +02:00
committed by Alex Deucher
parent 629be20395
commit 9d1b3c7805
3 changed files with 22 additions and 8 deletions
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18
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
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@@ -619,9 +619,12 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
struct drm_amdgpu_info_vram_gtt vram_gtt;
vram_gtt.vram_size = adev->gmc.real_vram_size -
atomic64_read(&adev->vram_pin_size);
vram_gtt.vram_cpu_accessible_size = adev->gmc.visible_vram_size -
atomic64_read(&adev->visible_pin_size);
atomic64_read(&adev->vram_pin_size) -
AMDGPU_VM_RESERVED_VRAM;
vram_gtt.vram_cpu_accessible_size =
min(adev->gmc.visible_vram_size -
atomic64_read(&adev->visible_pin_size),
vram_gtt.vram_size);
vram_gtt.gtt_size = adev->mman.bdev.man[TTM_PL_TT].size;
vram_gtt.gtt_size *= PAGE_SIZE;
vram_gtt.gtt_size -= atomic64_read(&adev->gart_pin_size);
@@ -634,15 +637,18 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
memset(&mem, 0, sizeof(mem));
mem.vram.total_heap_size = adev->gmc.real_vram_size;
mem.vram.usable_heap_size = adev->gmc.real_vram_size -
atomic64_read(&adev->vram_pin_size);
atomic64_read(&adev->vram_pin_size) -
AMDGPU_VM_RESERVED_VRAM;
mem.vram.heap_usage =
amdgpu_vram_mgr_usage(&adev->mman.bdev.man[TTM_PL_VRAM]);
mem.vram.max_allocation = mem.vram.usable_heap_size * 3 / 4;
mem.cpu_accessible_vram.total_heap_size =
adev->gmc.visible_vram_size;
mem.cpu_accessible_vram.usable_heap_size = adev->gmc.visible_vram_size -
atomic64_read(&adev->visible_pin_size);
mem.cpu_accessible_vram.usable_heap_size =
min(adev->gmc.visible_vram_size -
atomic64_read(&adev->visible_pin_size),
mem.vram.usable_heap_size);
mem.cpu_accessible_vram.heap_usage =
amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]);
mem.cpu_accessible_vram.max_allocation =