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dzn: Make sure sampler heaps don't contain more than 2048 samplers

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The spec says "The maximum number of samplers in a shader visible
descriptor heap is 2048.". Let's make sure we follow this rule
in dozen.

Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15884>
This commit is contained in:
Boris Brezillon 2022-04-11 05:20:04 -07:00 • committed by Marge Bot
parent 3becb2729a
commit 31ea1fcd14
1 changed files with 8 additions and 0 deletions
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8
src/microsoft/vulkan/dzn_descriptor_set.cpp
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@ -1446,6 +1446,14 @@ dzn_descriptor_heap_pool_alloc_slots(dzn_descriptor_heap_pool *pool,
64 * 1024 : 4 * 1024;
uint32_t alloc_step = ALIGN_POT(desc_count * pool->desc_sz, granularity);
uint32_t heap_desc_count = MAX2(alloc_step / pool->desc_sz, 16);
/* Maximum of 2048 samplers per heap when shader_visible is true. */
if (pool->shader_visible &&
pool->type == D3D12_DESCRIPTOR_HEAP_TYPE_SAMPLER) {
assert(desc_count <= 2048);
heap_desc_count = MIN2(heap_desc_count, 2048);
}
dzn_descriptor_heap_pool_entry *new_heap = NULL;
list_for_each_entry_safe(dzn_descriptor_heap_pool_entry, entry, &pool->free_heaps, link) {