iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/amdkfd: make sure VM is ready for updating operations

Browse Source 
When page table BOs were evicted but not validated before
updating page tables, VM is still in evicting state,
amdgpu_vm_update_range returns -EBUSY and
restore_process_worker runs into a dead loop.

v2: Split the BO validation and page table update into two
separate loops in amdgpu_amdkfd_restore_process_bos. (Felix)
  1.Validate BOs
  2.Validate VM (and DMABuf attachments)
  3.Update page tables for the BOs validated above

Fixes: 50661eb1a2c8 ("drm/amdgpu: Auto-validate DMABuf imports in compute VMs")
Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Acked-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:
Lang Yu 2024-04-07 12:36:00 +08:00 committed by Alex Deucher
parent e53a1713de
commit 81bf14519a
1 changed files with 20 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
View File

@ -2901,13 +2901,12 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence __rcu *
amdgpu_sync_create(&sync_obj);
/* Validate BOs and map them to GPUVM (update VM page tables). */
/* Validate BOs managed by KFD */
list_for_each_entry(mem, &process_info->kfd_bo_list,
validate_list) {
struct amdgpu_bo *bo = mem->bo;
uint32_t domain = mem->domain;
struct kfd_mem_attachment *attachment;
struct dma_resv_iter cursor;
struct dma_fence *fence;
@ -2932,6 +2931,25 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence __rcu *
goto validate_map_fail;
}
}
}
if (failed_size)
pr_debug("0x%lx/0x%lx in system\n", failed_size, total_size);
/* Validate PDs, PTs and evicted DMABuf imports last. Otherwise BO
* validations above would invalidate DMABuf imports again.
*/
ret = process_validate_vms(process_info, &exec.ticket);
if (ret) {
pr_debug("Validating VMs failed, ret: %d\n", ret);
goto validate_map_fail;
}
/* Update mappings managed by KFD. */
list_for_each_entry(mem, &process_info->kfd_bo_list,
validate_list) {
struct kfd_mem_attachment *attachment;
list_for_each_entry(attachment, &mem->attachments, list) {
if (!attachment->is_mapped)
continue;
@ -2948,18 +2966,6 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence __rcu *
}
}
if (failed_size)
pr_debug("0x%lx/0x%lx in system\n", failed_size, total_size);
/* Validate PDs, PTs and evicted DMABuf imports last. Otherwise BO
* validations above would invalidate DMABuf imports again.
*/
ret = process_validate_vms(process_info, &exec.ticket);
if (ret) {
pr_debug("Validating VMs failed, ret: %d\n", ret);
goto validate_map_fail;
}
/* Update mappings not managed by KFD */
list_for_each_entry(peer_vm, &process_info->vm_list_head,
vm_list_node) {