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anv/device: Only allocate whole pages in AllocateMemory

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The kernel is going to give us whole pages anyway, so allocating part of a
page doesn't help.  And this ensures that we can always work with whole
pages.
This commit is contained in:
Jason Ekstrand 2016-01-02 07:52:22 -08:00
parent f076d5330d
commit 6b0b57225c
2 changed files with 11 additions and 2 deletions
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7
src/vulkan/anv_device.c
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@ -1020,7 +1020,10 @@ VkResult anv_AllocateMemory(
if (mem == NULL)
return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
result = anv_bo_init_new(&mem->bo, device, pAllocateInfo->allocationSize);
/* The kernel is going to give us whole pages anyway */
uint64_t alloc_size = align_u64(pAllocateInfo->allocationSize, 4096);
result = anv_bo_init_new(&mem->bo, device, alloc_size);
if (result != VK_SUCCESS)
goto fail;
@ -1088,7 +1091,7 @@ VkResult anv_MapMemory(
uint64_t map_size = (offset + size) - map_offset;
/* Let's map whole pages */
map_size = (map_size + 4095) & ~4095ull;
map_size = align_u64(map_size, 4096);
mem->map = anv_gem_mmap(device, mem->bo.gem_handle,
map_offset, map_size, gem_flags);

6
src/vulkan/anv_private.h
View file

@ -86,6 +86,12 @@ align_u32(uint32_t v, uint32_t a)
return (v + a - 1) & ~(a - 1);
}
static inline uint64_t
align_u64(uint64_t v, uint64_t a)
{
return (v + a - 1) & ~(a - 1);
}
static inline int32_t
align_i32(int32_t v, int32_t a)
{