diff options
| author | Matthew Auld <matthew.auld@intel.com> | 2023-03-31 11:46:26 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2023-12-21 19:37:54 +0300 |
| commit | 6a024f1bfdfe3b535786780f67c38429df17e857 (patch) | |
| tree | ffe6f5ef62db5ffa705090bc47fb85998c9379c8 /drivers/gpu/drm/xe/xe_bo.h | |
| parent | 2a6d871bd97722e899780a8e429b0fb5f11dadc6 (diff) | |
| download | linux-6a024f1bfdfe3b535786780f67c38429df17e857.tar.xz | |
drm/xe/bo: support tiered vram allocation for small-bar
Add the new flag XE_BO_NEEDS_CPU_ACCESS, to force allocating in the
mappable part of vram. If no flag is specified we do a topdown
allocation, to limit the chances of stealing the precious mappable part,
if we don't need it. If this is a full-bar system, then this all gets
nooped.
For kernel users, it looks like xe_bo_create_pin_map() is the central
place which users should call if they want CPU access to the object, so
add the flag there.
We still need to plumb this through for userspace allocations. Also it
looks like page-tables are using pin_map(), which is less than ideal. If
we can already use the GPU to do page-table management, then maybe we
should just force that for small-bar.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/xe/xe_bo.h')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_bo.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_bo.h b/drivers/gpu/drm/xe/xe_bo.h index 12a291925fa9..e231b2829bef 100644 --- a/drivers/gpu/drm/xe/xe_bo.h +++ b/drivers/gpu/drm/xe/xe_bo.h @@ -41,6 +41,7 @@ #define XE_BO_SCANOUT_BIT BIT(10) #define XE_BO_FIXED_PLACEMENT_BIT BIT(11) #define XE_BO_PAGETABLE BIT(12) +#define XE_BO_NEEDS_CPU_ACCESS BIT(13) /* this one is trigger internally only */ #define XE_BO_INTERNAL_TEST BIT(30) #define XE_BO_INTERNAL_64K BIT(31) |