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drm/amdgpu: have bos for PDs/PTS cpu accessible when kfd uses cpu to update vm

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When kfd uses cpu to update vm iterates all current PDs/PTs bos, adds
AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED flag and kmap them to kernel virtual
address space before kfd updates the vm that was created by gfx.

Signed-off-by: Xiaogang Chen <Xiaogang.Chen@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Xiaogang Chen
2023-06-30 11:38:35 -05:00
committed by Alex Deucher
parent 9041b53a59
commit eb58ad143d
4 changed files with 35 additions and 7 deletions
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28
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
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@@ -1075,3 +1075,31 @@ int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params,
return 0;
}
/**
* amdgpu_vm_pt_map_tables - have bo of root PD cpu accessible
* @adev: amdgpu device structure
* @vm: amdgpu vm structure
*
* make root page directory and everything below it cpu accessible.
*/
int amdgpu_vm_pt_map_tables(struct amdgpu_device *adev, struct amdgpu_vm *vm)
{
struct amdgpu_vm_pt_cursor cursor;
struct amdgpu_vm_bo_base *entry;
for_each_amdgpu_vm_pt_dfs_safe(adev, vm, NULL, cursor, entry) {
struct amdgpu_bo_vm *bo;
int r;
if (entry->bo) {
bo = to_amdgpu_bo_vm(entry->bo);
r = vm->update_funcs->map_table(bo);
if (r)
return r;
}
}
return 0;
}