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drm/xe/bo: further limit where CCS pages are needed

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No need to allocate extra pages for this if we know flat-ccs AUX state
is not even possible, like for normal system memory objects.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Matthew Auld 2023-05-25 12:45:42 +01:00 committed by Rodrigo Vivi
parent 3690a01ba9
commit 38453f826d
1 changed files with 7 additions and 3 deletions
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10
drivers/gpu/drm/xe/xe_bo.c
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@ -285,6 +285,7 @@ static struct ttm_tt *xe_ttm_tt_create(struct ttm_buffer_object *ttm_bo,
struct xe_bo *bo = ttm_to_xe_bo(ttm_bo);
struct xe_device *xe = xe_bo_device(bo);
struct xe_ttm_tt *tt;
unsigned long extra_pages;
int err;
tt = kzalloc(sizeof(*tt), GFP_KERNEL);
@ -293,12 +294,15 @@ static struct ttm_tt *xe_ttm_tt_create(struct ttm_buffer_object *ttm_bo,
tt->dev = xe->drm.dev;
extra_pages = 0;
if (xe_bo_needs_ccs_pages(bo))
extra_pages = DIV_ROUND_UP(xe_device_ccs_bytes(xe, bo->size),
PAGE_SIZE);
/* TODO: Select caching mode */
err = ttm_tt_init(&tt->ttm, &bo->ttm, page_flags,
bo->flags & XE_BO_SCANOUT_BIT ? ttm_write_combined : ttm_cached,
DIV_ROUND_UP(xe_device_ccs_bytes(xe_bo_device(bo),
bo->ttm.base.size),
PAGE_SIZE));
extra_pages);
if (err) {
kfree(tt);
return NULL;