diff options
| author | Donald Robson <donald.robson@imgtec.com> | 2023-11-22 19:34:23 +0300 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2023-11-23 11:01:45 +0300 |
| commit | a191f73d85484f804284674c14f2d9f572c18adb (patch) | |
| tree | 85ff47373fee7bd03c0b5e36f9fc38281563494b /include/drm | |
| parent | 66b73e9a402d822723b3af5263eb12d735628eac (diff) | |
| download | linux-a191f73d85484f804284674c14f2d9f572c18adb.tar.xz | |
drm/gpuvm: Helper to get range of unmap from a remap op.
Determining the start and range of the unmap stage of a remap op is a
common piece of code currently implemented by multiple drivers. Add a
helper for this.
Changes since v7:
- Renamed helper to drm_gpuva_op_remap_to_unmap_range()
- Improved documentation
Changes since v6:
- Remove use of __always_inline
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Signed-off-by: Sarah Walker <sarah.walker@imgtec.com>
Reviewed-by: Danilo Krummrich <dakr@redhat.com>
Link: https://lore.kernel.org/r/8a0a5b5eeec459d3c60fcdaa5a638ad14a18a59e.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_gpuvm.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/drm/drm_gpuvm.h b/include/drm/drm_gpuvm.h index 8ca10461d8ac..f94fec9a8517 100644 --- a/include/drm/drm_gpuvm.h +++ b/include/drm/drm_gpuvm.h @@ -1213,4 +1213,32 @@ void drm_gpuva_remap(struct drm_gpuva *prev, void drm_gpuva_unmap(struct drm_gpuva_op_unmap *op); +/** + * drm_gpuva_op_remap_to_unmap_range() - Helper to get the start and range of + * the unmap stage of a remap op. + * @op: Remap op. + * @start_addr: Output pointer for the start of the required unmap. + * @range: Output pointer for the length of the required unmap. + * + * The given start address and range will be set such that they represent the + * range of the address space that was previously covered by the mapping being + * re-mapped, but is now empty. + */ +static inline void +drm_gpuva_op_remap_to_unmap_range(const struct drm_gpuva_op_remap *op, + u64 *start_addr, u64 *range) +{ + const u64 va_start = op->prev ? + op->prev->va.addr + op->prev->va.range : + op->unmap->va->va.addr; + const u64 va_end = op->next ? + op->next->va.addr : + op->unmap->va->va.addr + op->unmap->va->va.range; + + if (start_addr) + *start_addr = va_start; + if (range) + *range = va_end - va_start; +} + #endif /* __DRM_GPUVM_H__ */ |