Am 18.01.21 um 22:01 schrieb Andrey Grodzovsky:
On device removal reroute all CPU mappings to dummy page per drm_file instance or imported GEM object.
v4: Update for modified ttm_bo_vm_dummy_page
Signed-off-by: Andrey Grodzovsky andrey.grodzovsky@amd.com
Reviewed-by: Christian König christian.koenig@amd.com
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 9fd2157..550dc5e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -49,6 +49,7 @@
#include <drm/drm_debugfs.h> #include <drm/amdgpu_drm.h> +#include <drm/drm_drv.h>
#include "amdgpu.h" #include "amdgpu_object.h" @@ -1982,18 +1983,28 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable) static vm_fault_t amdgpu_ttm_fault(struct vm_fault *vmf) { struct ttm_buffer_object *bo = vmf->vma->vm_private_data;
struct drm_device *ddev = bo->base.dev; vm_fault_t ret;
int idx;
ret = ttm_bo_vm_reserve(bo, vmf); if (ret) return ret;
- ret = amdgpu_bo_fault_reserve_notify(bo);
- if (ret)
goto unlock;
- if (drm_dev_enter(ddev, &idx)) {
ret = amdgpu_bo_fault_reserve_notify(bo);if (ret) {drm_dev_exit(idx);goto unlock;}
- ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot,
TTM_BO_VM_NUM_PREFAULT, 1);
ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot,TTM_BO_VM_NUM_PREFAULT, 1);drm_dev_exit(idx);- } else {
ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot);- } if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) return ret;