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| author | Andrey Grodzovsky <andrey.grodzovsky@amd.com> | 2021-05-12 17:26:33 +0300 |
|---|---|---|
| committer | Andrey Grodzovsky <andrey.grodzovsky@amd.com> | 2021-05-20 06:45:49 +0300 |
| commit | 267d51d77fdae8708b94e1a24b8e5d961297edb7 (patch) | |
| tree | 3b3cceaf6fc5c2ecc336d9419dc725a27908a70d /include/drm | |
| parent | e52e4a3132a604c9f04a934bd6c2980f5293dc0a (diff) | |
| download | linux-267d51d77fdae8708b94e1a24b8e5d961297edb7.tar.xz | |
drm/ttm: Remap all page faults to per process dummy page.
On device removal reroute all CPU mappings to dummy page.
v3:
Remove loop to find DRM file and instead access it
by vma->vm_file->private_data. Move dummy page installation
into a separate function.
v4:
Map the entire BOs VA space into on demand allocated dummy page
on the first fault for that BO.
v5: Remove duplicate return.
v6: Polish ttm_bo_vm_dummy_page, remove superfluous code.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210512142648.666476-2-andrey.grodzovsky@amd.com
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/ttm/ttm_bo_api.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index 639521880c29..254ede97f8e3 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -620,4 +620,6 @@ int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr, void *buf, int len, int write); bool ttm_bo_delayed_delete(struct ttm_device *bdev, bool remove_all); +vm_fault_t ttm_bo_vm_dummy_page(struct vm_fault *vmf, pgprot_t prot); + #endif |