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anv/device: Increase the UBO alignment requirement to 32

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Push constants work in terms of 32-byte chunks so if we want to be able
to push UBOs, every thing needs to be 32-byte aligned.  Currently, we
only require 16-byte which is too small.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Jason Ekstrand
2017-12-01 16:07:23 -08:00
parent 2f9eb045f3
commit 8d34077182
1 changed files with 10 additions and 2 deletions
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12
src/intel/vulkan/anv_device.c
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@@ -849,7 +849,8 @@ void anv_GetPhysicalDeviceProperties(
.viewportSubPixelBits = 13, /* We take a float? */
.minMemoryMapAlignment = 4096, /* A page */
.minTexelBufferOffsetAlignment = 1,
.minUniformBufferOffsetAlignment = 16,
/* We need 16 for UBO block reads to work and 32 for push UBOs */
.minUniformBufferOffsetAlignment = 32,
.minStorageBufferOffsetAlignment = 4,
.minTexelOffset = -8,
.maxTexelOffset = 7,
@@ -1915,8 +1916,15 @@ void anv_GetBufferMemoryRequirements(
memory_types |= (1u << i);
}
/* Base alignment requirement of a cache line */
uint32_t alignment = 16;
/* We need an alignment of 32 for pushing UBOs */
if (buffer->usage & VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT)
alignment = MAX2(alignment, 32);
pMemoryRequirements->size = buffer->size;
pMemoryRequirements->alignment = 16;
pMemoryRequirements->alignment = alignment;
pMemoryRequirements->memoryTypeBits = memory_types;
}