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drm/amdgpu: add support for extended stolen vga memory

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This will allow us to split the allocation for systems
where we have to keep the stolen memory around to avoid
S3 issues.  This way we don't waste as much memory and
still avoid any screen artifacts during the bios to
driver transition.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2020-07-28 18:05:11 -04:00
parent 5db62dc8d4
commit 0635019412
2 changed files with 13 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
+2
View File
@@ -215,6 +215,8 @@ struct amdgpu_gmc {
bool prt_warning;
uint64_t stolen_vga_size;
struct amdgpu_bo *stolen_vga_memory;
uint64_t stolen_extended_size;
struct amdgpu_bo *stolen_extended_memory;
bool keep_stolen_vga_memory;
uint32_t sdpif_register;
/* apertures */
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+11 -2
View File
@@ -1915,7 +1915,7 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
uint64_t gtt_size;
int r;
u64 vis_vram_limit;
void *stolen_vga_buf;
void *stolen_vga_buf, *stolen_extended_buf;
mutex_init(&adev->mman.gtt_window_lock);
@@ -1985,6 +1985,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
&stolen_vga_buf);
if (r)
return r;
r = amdgpu_bo_create_kernel_at(adev, adev->gmc.stolen_vga_size,
adev->gmc.stolen_extended_size,
AMDGPU_GEM_DOMAIN_VRAM,
&adev->gmc.stolen_extended_memory,
&stolen_extended_buf);
if (r)
return r;
DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
(unsigned) (adev->gmc.real_vram_size / (1024 * 1024)));
@@ -2041,11 +2048,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
*/
void amdgpu_ttm_late_init(struct amdgpu_device *adev)
{
void *stolen_vga_buf;
void *stolen_vga_buf, *stolen_extended_buf;
/* return the VGA stolen memory (if any) back to VRAM */
if (!adev->gmc.keep_stolen_vga_memory)
amdgpu_bo_free_kernel(&adev->gmc.stolen_vga_memory, NULL, &stolen_vga_buf);
amdgpu_bo_free_kernel(&adev->gmc.stolen_extended_memory, NULL,
&stolen_extended_buf);
}
/**