nvk: Add a buffer alignment helper

This consolodates buffer alignment calculations into one place,
including physical device queries, buffer creation, and buffer memory
requirements queries.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>

src/nouveau/vulkan/nvk_buffer.c

@@ -4,6 +4,26 @@
 #include "nvk_device_memory.h"
 #include "nvk_physical_device.h"
 
+uint32_t
+nvk_get_buffer_alignment(UNUSED const struct nvk_physical_device *pdev,
+                         VkBufferUsageFlags usage_flags,
+                         UNUSED VkBufferCreateFlags create_flags)
+{
+   uint32_t alignment = 16;
+
+   if (usage_flags & VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT)
+      alignment = MAX2(alignment, NVK_MIN_UBO_ALIGNMENT);
+
+   if (usage_flags & VK_BUFFER_USAGE_STORAGE_BUFFER_BIT)
+      alignment = MAX2(alignment, NVK_MIN_SSBO_ALIGNMENT);
+
+   if (usage_flags & (VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT |
+                      VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT))
+      alignment = MAX2(alignment, NVK_MIN_UBO_ALIGNMENT);
+
+   return alignment;
+}
+
 VKAPI_ATTR VkResult VKAPI_CALL
 nvk_CreateBuffer(VkDevice device,
                  const VkBufferCreateInfo *pCreateInfo,
@@ -45,9 +65,14 @@ nvk_GetDeviceBufferMemoryRequirements(
 {
    VK_FROM_HANDLE(nvk_device, dev, device);
 
+   const uint32_t alignment =
+      nvk_get_buffer_alignment(nvk_device_physical(dev),
+                               pInfo->pCreateInfo->usage,
+                               pInfo->pCreateInfo->flags);
+
    pMemoryRequirements->memoryRequirements = (VkMemoryRequirements) {
-      .size = pInfo->pCreateInfo->size,
-      .alignment = 64, /* TODO */
+      .size = ALIGN_POT(pInfo->pCreateInfo->size, alignment),
+      .alignment = alignment,
       .memoryTypeBits = BITFIELD_MASK(dev->pdev->mem_type_cnt),
    };
 

src/nouveau/vulkan/nvk_buffer.h

@@ -8,6 +8,12 @@
 #include "vulkan/runtime/vk_buffer.h"
 
 struct nvk_device_memory;
+struct nvk_physical_device;
+
+uint32_t ATTRIBUTE_PURE
+nvk_get_buffer_alignment(const struct nvk_physical_device *pdev,
+                         VkBufferUsageFlags usage_flags,
+                         VkBufferCreateFlags create_flags);
 
 struct nvk_buffer {
    struct vk_buffer vk;

src/nouveau/vulkan/nvk_physical_device.c

@@ -1,6 +1,7 @@
 #include "nvk_physical_device.h"
 
 #include "nvk_bo_sync.h"
+#include "nvk_buffer.h"
 #include "nvk_entrypoints.h"
 #include "nvk_format.h"
 #include "nvk_image.h"
@@ -110,9 +111,14 @@ nvk_GetPhysicalDeviceProperties2(VkPhysicalDevice physicalDevice,
          .lineWidthGranularity = 0.0625,
          .nonCoherentAtomSize = 64,
          .minMemoryMapAlignment = 64,
-         .minUniformBufferOffsetAlignment = NVK_MIN_UBO_ALIGNMENT,
-         .minTexelBufferOffsetAlignment = NVK_MIN_UBO_ALIGNMENT,
-         .minStorageBufferOffsetAlignment = NVK_MIN_SSBO_ALIGNMENT,
+         .minUniformBufferOffsetAlignment =
+            nvk_get_buffer_alignment(pdev, VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, 0),
+         .minTexelBufferOffsetAlignment =
+            nvk_get_buffer_alignment(pdev, VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT |
+                                           VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT,
+                                     0),
+         .minStorageBufferOffsetAlignment =
+            nvk_get_buffer_alignment(pdev, VK_BUFFER_USAGE_STORAGE_BUFFER_BIT, 0),
          .maxVertexInputAttributeOffset = 2047,
          .maxVertexInputAttributes = 32,
          .maxVertexInputBindingStride = 2048,