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drm/amdgpu: Fix VRAM BO swap issue 

DRM buddy manager allocates the contiguous memory requests in
a single block or multiple blocks. So for the ttm move operation
(incase of low vram memory) we should consider all the blocks to
compute the total memory size which compared with the struct
ttm_resource num_pages in order to verify that the blocks are
contiguous for the eviction process.

v2: Added a Fixes tag
v3: Rewrite the code to save a bit of calculations and
    variables (Christian)

Fixes: c9cad937c0 ("drm/amdgpu: add drm buddy support to amdgpu")
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Arunpravin Paneer Selvam 2022-10-04 07:33:39 -07:00 committed by Alex Deucher
parent 7e4ab9fb2b
commit 312b4dc11d
1 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
View File

@ -424,8 +424,9 @@ error:
static bool amdgpu_mem_visible(struct amdgpu_device *adev,
struct ttm_resource *mem)
{
uint64_t mem_size = (u64)mem->num_pages << PAGE_SHIFT;
u64 mem_size = (u64)mem->num_pages << PAGE_SHIFT;
struct amdgpu_res_cursor cursor;
u64 end;
if (mem->mem_type == TTM_PL_SYSTEM ||
mem->mem_type == TTM_PL_TT)
@ -434,12 +435,18 @@ static bool amdgpu_mem_visible(struct amdgpu_device *adev,
return false;
amdgpu_res_first(mem, 0, mem_size, &cursor);
end = cursor.start + cursor.size;
while (cursor.remaining) {
amdgpu_res_next(&cursor, cursor.size);
/* ttm_resource_ioremap only supports contiguous memory */
if (cursor.size != mem_size)
return false;
/* ttm_resource_ioremap only supports contiguous memory */
if (end != cursor.start)
return false;
return cursor.start + cursor.size <= adev->gmc.visible_vram_size;
end = cursor.start + cursor.size;
}
return end <= adev->gmc.visible_vram_size;
}
/*