diff options
| author | Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> | 2026-10-01 09:06:05 +0530 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2026-10-01 08:46:22 -0400 |
| commit | 927a6ab619d3f65c2c6fc7fc3f5a67e751629824 (patch) | |
| tree | 4b193889e31261ff238fd2e3f15de9c50d4db636 /include/drm | |
| parent | 2069eeb76a16cea613e309242bd17bd967cce95d (diff) | |
drm/gpusvm: Add devmem callback to get_pages
Add an optional drm_gpusvm_ctx.devmem_fn, invoked for each device-memory
allocation backing the range's faulted pages. It runs under the notifier
lock and independently of the DMA map, so it also fires with no_dma_map.
Adjacent pages of one allocation are coalesced, so the callback must be
idempotent.
v2
Reset last to NULL for non-devmem pages(Sashiko/Matt)
v3
Run drm_gpusvm_pages_valid_unlocked() on the map_dma path even when
devmem_fn is set, so an invalidated range's stale inline mapping is
reset.
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20261001033602.3166274-8-himal.prasad.ghimiray@intel.com
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_gpusvm.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/drm/drm_gpusvm.h b/include/drm/drm_gpusvm.h index 9e35584812fd..4d31c6bba745 100644 --- a/include/drm/drm_gpusvm.h +++ b/include/drm/drm_gpusvm.h @@ -274,6 +274,11 @@ struct drm_gpusvm { * pages as valid; the caller revalidates the snapshot itself, see * drm_gpusvm_get_pages(). @devmem_only is rejected and no page * type check is performed, so @allow_mixed has no effect. + * @devmem_fn: Optional callback invoked under the notifier lock, once per + * contiguous run of pages backed by the same &drm_pagemap_devmem. + * Must not sleep and must be idempotent, as a non-contiguous + * allocation is reported more than once. Fires even with + * @no_dma_map. May be NULL. * * Context that is DRM GPUSVM is operating in (i.e. user arguments). */ @@ -281,6 +286,7 @@ struct drm_gpusvm_ctx { void *device_private_page_owner; unsigned long check_pages_threshold; unsigned long timeslice_ms; + void (*devmem_fn)(struct drm_pagemap_devmem *devmem); unsigned int in_notifier :1; unsigned int read_only :1; unsigned int devmem_possible :1; |