From: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx>
commit 312b4dc11d4f74bfe03ea25ffe04c1f2fdd13cb9 upstream.
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: c9cad937c0c5 ("drm/amdgpu: add drm buddy support to amdgpu")
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: "Limonciello, Mario" <Mario.Limonciello@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -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 am
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;
+
+ end = cursor.start + cursor.size;
+ }
- return cursor.start + cursor.size <= adev->gmc.visible_vram_size;
+ return end <= adev->gmc.visible_vram_size;
}
/*
