提交 bf60efd3 编写于 作者: C Christian König 提交者: Alex Deucher

drm/amdgpu: use only one reservation object for each VM v2

Reduces the locking and fencing overhead.

v2: add comment why we need the duplicates list in the GEM op.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: NJammy Zhou <Jammy.Zhou@amd.com>
上级 a5b75058
......@@ -455,11 +455,12 @@ static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
struct ttm_validate_buffer tv, *entry;
struct amdgpu_bo_list_entry *vm_bos;
struct ww_acquire_ctx ticket;
struct list_head list;
struct list_head list, duplicates;
unsigned domain;
int r;
INIT_LIST_HEAD(&list);
INIT_LIST_HEAD(&duplicates);
tv.bo = &bo_va->bo->tbo;
tv.shared = true;
......@@ -469,7 +470,8 @@ static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
if (!vm_bos)
return;
r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
/* Provide duplicates to avoid -EALREADY */
r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
if (r)
goto error_free;
......
......@@ -685,31 +685,6 @@ static int amdgpu_vm_update_ptes(struct amdgpu_device *adev,
return 0;
}
/**
* amdgpu_vm_fence_pts - fence page tables after an update
*
* @vm: requested vm
* @start: start of GPU address range
* @end: end of GPU address range
* @fence: fence to use
*
* Fence the page tables in the range @start - @end (cayman+).
*
* Global and local mutex must be locked!
*/
static void amdgpu_vm_fence_pts(struct amdgpu_vm *vm,
uint64_t start, uint64_t end,
struct fence *fence)
{
unsigned i;
start >>= amdgpu_vm_block_size;
end >>= amdgpu_vm_block_size;
for (i = start; i <= end; ++i)
amdgpu_bo_fence(vm->page_tables[i].bo, fence, true);
}
/**
* amdgpu_vm_bo_update_mapping - update a mapping in the vm page table
*
......@@ -813,8 +788,7 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
if (r)
goto error_free;
amdgpu_vm_fence_pts(vm, mapping->it.start,
mapping->it.last + 1, f);
amdgpu_bo_fence(vm->page_directory, f, true);
if (fence) {
fence_put(*fence);
*fence = fence_get(f);
......@@ -1089,6 +1063,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
/* walk over the address space and allocate the page tables */
for (pt_idx = saddr; pt_idx <= eaddr; ++pt_idx) {
struct reservation_object *resv = vm->page_directory->tbo.resv;
struct amdgpu_bo *pt;
if (vm->page_tables[pt_idx].bo)
......@@ -1097,11 +1072,13 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
/* drop mutex to allocate and clear page table */
mutex_unlock(&vm->mutex);
ww_mutex_lock(&resv->lock, NULL);
r = amdgpu_bo_create(adev, AMDGPU_VM_PTE_COUNT * 8,
AMDGPU_GPU_PAGE_SIZE, true,
AMDGPU_GEM_DOMAIN_VRAM,
AMDGPU_GEM_CREATE_NO_CPU_ACCESS,
NULL, NULL, &pt);
NULL, resv, &pt);
ww_mutex_unlock(&resv->lock);
if (r)
goto error_free;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册