UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/amdgpu: try allocating VRAM as power of two 

Try to allocate VRAM in power of two sizes and only fallback to vram
split sizes if that fails.

Signed-off-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:
Christian König 2018-09-07 14:27:05 +02:00 committed by Alex Deucher
parent d8de8260a4
commit 433ca05494
1 changed files with 40 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
View File

@ -124,6 +124,28 @@ u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
return usage;
}
/**
* amdgpu_vram_mgr_virt_start - update virtual start address
*
* @mem: ttm_mem_reg to update
* @node: just allocated node
*
* Calculate a virtual BO start address to easily check if everything is CPU
* accessible.
*/
static void amdgpu_vram_mgr_virt_start(struct ttm_mem_reg *mem,
struct drm_mm_node *node)
{
unsigned long start;
start = node->start + node->size;
if (start > mem->num_pages)
start -= mem->num_pages;
else
start = 0;
mem->start = max(mem->start, start);
}
/**
* amdgpu_vram_mgr_new - allocate new ranges
*
@ -176,10 +198,25 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
pages_left = mem->num_pages;
spin_lock(&mgr->lock);
for (i = 0; i < num_nodes; ++i) {
for (i = 0; pages_left >= pages_per_node; ++i) {
unsigned long pages = rounddown_pow_of_two(pages_left);
r = drm_mm_insert_node_in_range(mm, &nodes[i], pages,
pages_per_node, 0,
place->fpfn, lpfn,
mode);
if (unlikely(r))
break;
usage += nodes[i].size << PAGE_SHIFT;
vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
pages_left -= pages;
}
for (; pages_left; ++i) {
unsigned long pages = min(pages_left, pages_per_node);
uint32_t alignment = mem->page_alignment;
unsigned long start;
if (pages == pages_per_node)
alignment = pages_per_node;
@ -193,16 +230,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
usage += nodes[i].size << PAGE_SHIFT;
vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
/* Calculate a virtual BO start address to easily check if
* everything is CPU accessible.
*/
start = nodes[i].start + nodes[i].size;
if (start > mem->num_pages)
start -= mem->num_pages;
else
start = 0;
mem->start = max(mem->start, start);
amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
pages_left -= pages;
}
spin_unlock(&mgr->lock);