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drm/i915/ttm: limit where we apply TTM_PL_FLAG_CONTIGUOUS

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We only need this when allocating device local-memory, where this
influences the drm_buddy. Currently there is some funny behaviour where
an "in limbo" system memory object is lacking the relevant placement
flags etc. before we first allocate the ttm_tt, leading to ttm
performing a move when not needed, since the current placement is seen
as not compatible.

Suggested-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Fixes: 2ed38cec56 ("drm/i915: opportunistically apply ALLOC_CONTIGIOUS")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Nirmoy Das <nirmoy.das@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Acked-by: Nirmoy Das <nirmoy.das@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220324172143.377104-1-matthew.auld@intel.com
This commit is contained in:
Matthew Auld 2022-03-24 17:21:42 +00:00
parent d8b932014c
commit 66ddc69373
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/gem/i915_gem_ttm.c
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@ -133,6 +133,9 @@ i915_ttm_place_from_region(const struct intel_memory_region *mr,
memset(place, 0, sizeof(*place));
place->mem_type = intel_region_to_ttm_type(mr);
if (mr->type == INTEL_MEMORY_SYSTEM)
return;
if (flags & I915_BO_ALLOC_CONTIGUOUS)
place->flags |= TTM_PL_FLAG_CONTIGUOUS;
if (offset != I915_BO_INVALID_OFFSET) {