turnip: Add support for uniform texel buffers.

Pretty straightforward: Port texture descriptor code from freedreno, fill
in alignment limits from closed vk, and tu_cmd_buffer.c was already
uploading the texture descriptor.

This doesn't implement storage texel buffers (required in the compute
pipeline) yet, since those will need an IBO descriptor for the store path.
Still, making the load path be connected to the texture descriptor won't
hurt.

Part of #2237

Fixes dEQP-VK.binding_model.shader_access.primary_cmd_buf.uniform_texel_buffer.*

Reviewed-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3522>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3522>

src/freedreno/vulkan/tu_descriptor_set.c

@@ -85,12 +85,12 @@ descriptor_size(enum VkDescriptorType type)
       return 0;
    case VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER:
    case VK_DESCRIPTOR_TYPE_STORAGE_BUFFER:
-   case VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER:
-   case VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER:
       /* 64bit pointer */
       return 8;
    case VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE:
    case VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT:
+   case VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER:
+   case VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER:
       return A6XX_TEX_CONST_DWORDS * 4;
    case VK_DESCRIPTOR_TYPE_STORAGE_IMAGE:
       /* We may need the IBO or the TEX representation, or both. */
@@ -696,9 +696,16 @@ static void write_texel_buffer_descriptor(struct tu_device *device,
                                           struct tu_cmd_buffer *cmd_buffer,
                                           unsigned *dst,
                                           struct tu_bo **buffer_list,
-                                          const VkBufferView _buffer_view)
+                                          const VkBufferView buffer_view)
 {
-   tu_finishme("texel buffer descriptor");
+   TU_FROM_HANDLE(tu_buffer_view, view, buffer_view);
+
+   memcpy(dst, view->descriptor, sizeof(view->descriptor));
+
+   if (cmd_buffer)
+      tu_bo_list_add(&cmd_buffer->bo_list, view->buffer->bo, MSM_SUBMIT_BO_READ);
+   else
+      *buffer_list = view->buffer->bo;
 }
 
 static void write_buffer_descriptor(struct tu_device *device,

src/freedreno/vulkan/tu_device.c

@@ -786,7 +786,7 @@ tu_GetPhysicalDeviceProperties(VkPhysicalDevice physicalDevice,
       .viewportBoundsRange = { INT16_MIN, INT16_MAX },
       .viewportSubPixelBits = 8,
       .minMemoryMapAlignment = 4096, /* A page */
-      .minTexelBufferOffsetAlignment = 1,
+      .minTexelBufferOffsetAlignment = 64,
       .minUniformBufferOffsetAlignment = 4,
       .minStorageBufferOffsetAlignment = 4,
       .minTexelOffset = -32,

src/freedreno/vulkan/tu_image.c

@@ -29,6 +29,7 @@
 
 #include "util/debug.h"
 #include "util/u_atomic.h"
+#include "util/format/u_format.h"
 #include "vk_format.h"
 #include "vk_util.h"
 #include "drm-uapi/drm_fourcc.h"
@@ -484,10 +485,45 @@ tu_buffer_view_init(struct tu_buffer_view *view,
 {
    TU_FROM_HANDLE(tu_buffer, buffer, pCreateInfo->buffer);
 
-   view->range = pCreateInfo->range == VK_WHOLE_SIZE
-                    ? buffer->size - pCreateInfo->offset
-                    : pCreateInfo->range;
-   view->vk_format = pCreateInfo->format;
+   view->buffer = buffer;
+
+   enum VkFormat vfmt = pCreateInfo->format;
+   enum pipe_format pfmt = vk_format_to_pipe_format(vfmt);
+   const struct tu_native_format *fmt = tu6_get_native_format(vfmt);
+
+   uint32_t range;
+   if (pCreateInfo->range == VK_WHOLE_SIZE)
+      range = buffer->size - pCreateInfo->offset;
+   else
+      range = pCreateInfo->range;
+   uint32_t elements = range / util_format_get_blocksize(pfmt);
+
+   static const VkComponentMapping components = {
+      .r = VK_COMPONENT_SWIZZLE_R,
+      .g = VK_COMPONENT_SWIZZLE_G,
+      .b = VK_COMPONENT_SWIZZLE_B,
+      .a = VK_COMPONENT_SWIZZLE_A,
+   };
+
+   uint64_t iova = tu_buffer_iova(buffer) + pCreateInfo->offset;
+
+   memset(&view->descriptor, 0, sizeof(view->descriptor));
+
+   view->descriptor[0] =
+      A6XX_TEX_CONST_0_TILE_MODE(TILE6_LINEAR) |
+      A6XX_TEX_CONST_0_SWAP(fmt->swap) |
+      A6XX_TEX_CONST_0_FMT(fmt->tex) |
+      A6XX_TEX_CONST_0_MIPLVLS(0) |
+      tu6_texswiz(&components, vfmt, VK_IMAGE_ASPECT_COLOR_BIT);
+      COND(vk_format_is_srgb(vfmt), A6XX_TEX_CONST_0_SRGB);
+   view->descriptor[1] =
+      A6XX_TEX_CONST_1_WIDTH(elements & MASK(15)) |
+      A6XX_TEX_CONST_1_HEIGHT(elements >> 15);
+   view->descriptor[2] =
+      A6XX_TEX_CONST_2_UNK4 |
+      A6XX_TEX_CONST_2_UNK31;
+   view->descriptor[4] = iova;
+   view->descriptor[5] = iova >> 32;
 }
 
 VkResult

src/freedreno/vulkan/tu_private.h

@@ -1413,9 +1413,9 @@ tu_image_view_init(struct tu_image_view *view,
 
 struct tu_buffer_view
 {
-   VkFormat vk_format;
-   uint64_t range; /**< VkBufferViewCreateInfo::range */
-   uint32_t state[4];
+   uint32_t descriptor[A6XX_TEX_CONST_DWORDS];
+
+   struct tu_buffer *buffer;
 };
 void
 tu_buffer_view_init(struct tu_buffer_view *view,