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drm/i915: Add a new "remapped" gtt_view

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To overcome display engine stride limits we'll want to remap the
pages in the GTT. To that end we need a new gtt_view type which
is just like the "rotated" type except not rotated.

v2: Use intel_remapped_plane_info base type
    s/unused/unused_mbz/ (Chris)
    Separate BUILD_BUG_ON()s (Chris)
    Use I915_GTT_PAGE_SIZE (Chris)
v3: Use i915_gem_object_get_dma_address() (Chris)
    Trim the sg (Tvrtko)
v4: Actually trim this time. Limit the max length
    to one row of pages to keep things simple

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190509122159.24376-2-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
This commit is contained in:
Ville Syrjälä
2019-05-09 15:21:52 +03:00
parent 4cc79cbb01
commit 1a74fc0b3f
10 changed files with 163 additions and 10 deletions
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3
drivers/gpu/drm/i915/i915_vma.h
View File

@@ -277,8 +277,11 @@ i915_vma_compare(struct i915_vma *vma,
*/
BUILD_BUG_ON(I915_GGTT_VIEW_NORMAL >= I915_GGTT_VIEW_PARTIAL);
BUILD_BUG_ON(I915_GGTT_VIEW_PARTIAL >= I915_GGTT_VIEW_ROTATED);
BUILD_BUG_ON(I915_GGTT_VIEW_ROTATED >= I915_GGTT_VIEW_REMAPPED);
BUILD_BUG_ON(offsetof(typeof(*view), rotated) !=
offsetof(typeof(*view), partial));
BUILD_BUG_ON(offsetof(typeof(*view), rotated) !=
offsetof(typeof(*view), remapped));
return memcmp(&vma->ggtt_view.partial, &view->partial, view->type);
}