mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-29 04:09:39 +00:00
drm/amdgpu: reserve at least 4MB of VRAM for page tables v2
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:
parent
629be20395
commit
9d1b3c7805
3 changed files with 22 additions and 8 deletions
|
@ -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 =
|
||||
|
|
|
@ -99,6 +99,9 @@ struct amdgpu_bo_list_entry;
|
|||
#define AMDGPU_VM_FAULT_STOP_FIRST 1
|
||||
#define AMDGPU_VM_FAULT_STOP_ALWAYS 2
|
||||
|
||||
/* Reserve 4MB VRAM for page tables */
|
||||
#define AMDGPU_VM_RESERVED_VRAM (4ULL << 20)
|
||||
|
||||
/* max number of VMHUB */
|
||||
#define AMDGPU_MAX_VMHUBS 3
|
||||
#define AMDGPU_GFXHUB_0 0
|
||||
|
|
|
@ -23,6 +23,7 @@
|
|||
*/
|
||||
|
||||
#include "amdgpu.h"
|
||||
#include "amdgpu_vm.h"
|
||||
|
||||
struct amdgpu_vram_mgr {
|
||||
struct drm_mm mm;
|
||||
|
@ -275,7 +276,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
|
|||
struct drm_mm_node *nodes;
|
||||
enum drm_mm_insert_mode mode;
|
||||
unsigned long lpfn, num_nodes, pages_per_node, pages_left;
|
||||
uint64_t vis_usage = 0, mem_bytes;
|
||||
uint64_t vis_usage = 0, mem_bytes, max_bytes;
|
||||
unsigned i;
|
||||
int r;
|
||||
|
||||
|
@ -283,9 +284,13 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
|
|||
if (!lpfn)
|
||||
lpfn = man->size;
|
||||
|
||||
max_bytes = adev->gmc.mc_vram_size;
|
||||
if (tbo->type != ttm_bo_type_kernel)
|
||||
max_bytes -= AMDGPU_VM_RESERVED_VRAM;
|
||||
|
||||
/* bail out quickly if there's likely not enough VRAM for this BO */
|
||||
mem_bytes = (u64)mem->num_pages << PAGE_SHIFT;
|
||||
if (atomic64_add_return(mem_bytes, &mgr->usage) > adev->gmc.mc_vram_size) {
|
||||
if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) {
|
||||
atomic64_sub(mem_bytes, &mgr->usage);
|
||||
mem->mm_node = NULL;
|
||||
return 0;
|
||||
|
|
Loading…
Reference in a new issue