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anv: flag BO for write combine when CPU visible and potentially in lmem

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This should fix a performance regression with the internal kernel
branch which does not support the upstream I915_MMAP_OFFSET_FIXED.

With I915_MMAP_OFFSET_FIXED we defer the mapping flags to the kernel
since it knows better where buffers are going to end up (lmem or smem).

The internal kernel doesn´t have that and there we should use write
combined for anything that can be in lmem.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18841>
This commit is contained in:
Lionel Landwerlin 2022-09-23 22:21:10 +03:00 • committed by Marge Bot
parent c8f563b633
commit 582bf4d9f7
1 changed files with 7 additions and 0 deletions
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7
src/intel/vulkan/anv_device.c
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@ -3923,6 +3923,13 @@ VkResult anv_AllocateMemory(
if (!(mem_type->propertyFlags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT))
alloc_flags |= ANV_BO_ALLOC_NO_LOCAL_MEM;
/* If the allocated buffer might end up in local memory and it's host
* visible, make CPU writes are combined, it should be faster.
*/
if (!(alloc_flags & ANV_BO_ALLOC_NO_LOCAL_MEM) &&
(mem_type->propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT))
alloc_flags |= ANV_BO_ALLOC_WRITE_COMBINE;
if (vk_flags & VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT)
alloc_flags |= ANV_BO_ALLOC_CLIENT_VISIBLE_ADDRESS;