mesa/src/broadcom/vulkan/v3dv_image.c

/*
 * Copyright © 2019 Raspberry Pi Ltd
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include "v3dv_private.h"

#include "drm-uapi/drm_fourcc.h"
#include "util/format/u_format.h"
#include "util/u_math.h"
#include "vk_util.h"
#include "vulkan/wsi/wsi_common.h"

/**
 * Computes the HW's UIFblock padding for a given height/cpp.
 *
 * The goal of the padding is to keep pages of the same color (bank number) at
 * least half a page away from each other vertically when crossing between
 * columns of UIF blocks.
 */
static uint32_t
v3d_get_ub_pad(uint32_t cpp, uint32_t height)
{
   uint32_t utile_h = v3d_utile_height(cpp);
   uint32_t uif_block_h = utile_h * 2;
   uint32_t height_ub = height / uif_block_h;

   uint32_t height_offset_in_pc = height_ub % PAGE_CACHE_UB_ROWS;

   /* For the perfectly-aligned-for-UIF-XOR case, don't add any pad. */
   if (height_offset_in_pc == 0)
      return 0;

   /* Try padding up to where we're offset by at least half a page. */
   if (height_offset_in_pc < PAGE_UB_ROWS_TIMES_1_5) {
      /* If we fit entirely in the page cache, don't pad. */
      if (height_ub < PAGE_CACHE_UB_ROWS)
         return 0;
      else
         return PAGE_UB_ROWS_TIMES_1_5 - height_offset_in_pc;
   }

   /* If we're close to being aligned to page cache size, then round up
    * and rely on XOR.
    */
   if (height_offset_in_pc > PAGE_CACHE_MINUS_1_5_UB_ROWS)
      return PAGE_CACHE_UB_ROWS - height_offset_in_pc;

   /* Otherwise, we're far enough away (top and bottom) to not need any
    * padding.
    */
   return 0;
}

static void
v3d_setup_slices(struct v3dv_image *image)
{
   assert(image->cpp > 0);

   uint32_t width = image->vk.extent.width;
   uint32_t height = image->vk.extent.height;
   uint32_t depth = image->vk.extent.depth;

   /* Note that power-of-two padding is based on level 1.  These are not
    * equivalent to just util_next_power_of_two(dimension), because at a
    * level 0 dimension of 9, the level 1 power-of-two padded value is 4,
    * not 8.
    */
   uint32_t pot_width = 2 * util_next_power_of_two(u_minify(width, 1));
   uint32_t pot_height = 2 * util_next_power_of_two(u_minify(height, 1));
   uint32_t pot_depth = 2 * util_next_power_of_two(u_minify(depth, 1));

   uint32_t utile_w = v3d_utile_width(image->cpp);
   uint32_t utile_h = v3d_utile_height(image->cpp);
   uint32_t uif_block_w = utile_w * 2;
   uint32_t uif_block_h = utile_h * 2;

   uint32_t block_width = vk_format_get_blockwidth(image->vk.format);
   uint32_t block_height = vk_format_get_blockheight(image->vk.format);

   assert(image->vk.samples == VK_SAMPLE_COUNT_1_BIT ||
          image->vk.samples == VK_SAMPLE_COUNT_4_BIT);
   bool msaa = image->vk.samples != VK_SAMPLE_COUNT_1_BIT;

   bool uif_top = msaa;

   assert(image->vk.array_layers > 0);
   assert(depth > 0);
   assert(image->vk.mip_levels >= 1);

   uint32_t offset = 0;
   for (int32_t i = image->vk.mip_levels - 1; i >= 0; i--) {
      struct v3d_resource_slice *slice = &image->slices[i];

      uint32_t level_width, level_height, level_depth;
      if (i < 2) {
         level_width = u_minify(width, i);
         level_height = u_minify(height, i);
      } else {
         level_width = u_minify(pot_width, i);
         level_height = u_minify(pot_height, i);
      }

      if (i < 1)
         level_depth = u_minify(depth, i);
      else
         level_depth = u_minify(pot_depth, i);

      if (msaa) {
         level_width *= 2;
         level_height *= 2;
      }

      level_width = DIV_ROUND_UP(level_width, block_width);
      level_height = DIV_ROUND_UP(level_height, block_height);

      if (!image->tiled) {
         slice->tiling = V3D_TILING_RASTER;
         if (image->vk.image_type == VK_IMAGE_TYPE_1D)
            level_width = align(level_width, 64 / image->cpp);
      } else {
         if ((i != 0 || !uif_top) &&
             (level_width <= utile_w || level_height <= utile_h)) {
            slice->tiling = V3D_TILING_LINEARTILE;
            level_width = align(level_width, utile_w);
            level_height = align(level_height, utile_h);
         } else if ((i != 0 || !uif_top) && level_width <= uif_block_w) {
            slice->tiling = V3D_TILING_UBLINEAR_1_COLUMN;
            level_width = align(level_width, uif_block_w);
            level_height = align(level_height, uif_block_h);
         } else if ((i != 0 || !uif_top) && level_width <= 2 * uif_block_w) {
            slice->tiling = V3D_TILING_UBLINEAR_2_COLUMN;
            level_width = align(level_width, 2 * uif_block_w);
            level_height = align(level_height, uif_block_h);
         } else {
            /* We align the width to a 4-block column of UIF blocks, but we
             * only align height to UIF blocks.
             */
            level_width = align(level_width, 4 * uif_block_w);
            level_height = align(level_height, uif_block_h);

            slice->ub_pad = v3d_get_ub_pad(image->cpp, level_height);
            level_height += slice->ub_pad * uif_block_h;

            /* If the padding set us to to be aligned to the page cache size,
             * then the HW will use the XOR bit on odd columns to get us
             * perfectly misaligned.
             */
            if ((level_height / uif_block_h) %
                (V3D_PAGE_CACHE_SIZE / V3D_UIFBLOCK_ROW_SIZE) == 0) {
               slice->tiling = V3D_TILING_UIF_XOR;
            } else {
               slice->tiling = V3D_TILING_UIF_NO_XOR;
            }
         }
      }

      slice->offset = offset;
      slice->stride = level_width * image->cpp;
      slice->padded_height = level_height;
      if (slice->tiling == V3D_TILING_UIF_NO_XOR ||
          slice->tiling == V3D_TILING_UIF_XOR) {
         slice->padded_height_of_output_image_in_uif_blocks =
            slice->padded_height / (2 * v3d_utile_height(image->cpp));
      }

      slice->size = level_height * slice->stride;
      uint32_t slice_total_size = slice->size * level_depth;

      /* The HW aligns level 1's base to a page if any of level 1 or
       * below could be UIF XOR.  The lower levels then inherit the
       * alignment for as long as necesary, thanks to being power of
       * two aligned.
       */
      if (i == 1 &&
          level_width > 4 * uif_block_w &&
          level_height > PAGE_CACHE_MINUS_1_5_UB_ROWS * uif_block_h) {
         slice_total_size = align(slice_total_size, V3D_UIFCFG_PAGE_SIZE);
      }

      offset += slice_total_size;
   }

   image->size = offset;

   /* UIF/UBLINEAR levels need to be aligned to UIF-blocks, and LT only
    * needs to be aligned to utile boundaries.  Since tiles are laid out
    * from small to big in memory, we need to align the later UIF slices
    * to UIF blocks, if they were preceded by non-UIF-block-aligned LT
    * slices.
    *
    * We additionally align to 4k, which improves UIF XOR performance.
    */
   image->alignment = image->tiled ? 4096 : image->cpp;
   uint32_t align_offset =
      align(image->slices[0].offset, image->alignment) - image->slices[0].offset;
   if (align_offset) {
      image->size += align_offset;
      for (int i = 0; i < image->vk.mip_levels; i++)
         image->slices[i].offset += align_offset;
   }

   /* Arrays and cube textures have a stride which is the distance from
    * one full mipmap tree to the next (64b aligned).  For 3D textures,
    * we need to program the stride between slices of miplevel 0.
    */
   if (image->vk.image_type != VK_IMAGE_TYPE_3D) {
      image->cube_map_stride =
         align(image->slices[0].offset + image->slices[0].size, 64);
      image->size += image->cube_map_stride * (image->vk.array_layers - 1);
   } else {
      image->cube_map_stride = image->slices[0].size;
   }
}

uint32_t
v3dv_layer_offset(const struct v3dv_image *image, uint32_t level, uint32_t layer)
{
   const struct v3d_resource_slice *slice = &image->slices[level];

   if (image->vk.image_type == VK_IMAGE_TYPE_3D)
      return image->mem_offset + slice->offset + layer * slice->size;
   else
      return image->mem_offset + slice->offset + layer * image->cube_map_stride;
}

static VkResult
create_image(struct v3dv_device *device,
             const VkImageCreateInfo *pCreateInfo,
             const VkAllocationCallbacks *pAllocator,
             VkImage *pImage)
{
   struct v3dv_image *image = NULL;

   image = vk_image_create(&device->vk, pCreateInfo, pAllocator, sizeof(*image));
   if (image == NULL)
      return vk_error(device, VK_ERROR_OUT_OF_HOST_MEMORY);

   /* When using the simulator the WSI common code will see that our
    * driver wsi device doesn't match the display device and because of that
    * it will not attempt to present directly from the swapchain images,
    * instead it will use the prime blit path (use_buffer_blit flag in
    * struct wsi_swapchain), where it copies the contents of the swapchain
    * images to a linear buffer with appropriate row stride for presentation.
    * As a result, on that path, swapchain images do not have any special
    * requirements and are not created with the pNext structs below.
    */
   VkImageTiling tiling = pCreateInfo->tiling;
   uint64_t modifier = DRM_FORMAT_MOD_INVALID;
   if (tiling == VK_IMAGE_TILING_DRM_FORMAT_MODIFIER_EXT) {
      const VkImageDrmFormatModifierListCreateInfoEXT *mod_info =
         vk_find_struct_const(pCreateInfo->pNext,
                              IMAGE_DRM_FORMAT_MODIFIER_LIST_CREATE_INFO_EXT);
      const VkImageDrmFormatModifierExplicitCreateInfoEXT *explicit_mod_info =
         vk_find_struct_const(pCreateInfo->pNext,
                              IMAGE_DRM_FORMAT_MODIFIER_EXPLICIT_CREATE_INFO_EXT);
      assert(mod_info || explicit_mod_info);

      if (mod_info) {
         for (uint32_t i = 0; i < mod_info->drmFormatModifierCount; i++) {
            switch (mod_info->pDrmFormatModifiers[i]) {
            case DRM_FORMAT_MOD_LINEAR:
               if (modifier == DRM_FORMAT_MOD_INVALID)
                  modifier = DRM_FORMAT_MOD_LINEAR;
               break;
            case DRM_FORMAT_MOD_BROADCOM_UIF:
               modifier = DRM_FORMAT_MOD_BROADCOM_UIF;
               break;
            }
         }
      } else {
         modifier = explicit_mod_info->drmFormatModifier;
      }
      assert(modifier == DRM_FORMAT_MOD_LINEAR ||
             modifier == DRM_FORMAT_MOD_BROADCOM_UIF);
   } else if (pCreateInfo->imageType == VK_IMAGE_TYPE_1D ||
              image->vk.wsi_legacy_scanout) {
      tiling = VK_IMAGE_TILING_LINEAR;
   }

#ifdef ANDROID
   const VkNativeBufferANDROID *native_buffer =
      vk_find_struct_const(pCreateInfo->pNext, NATIVE_BUFFER_ANDROID);

   int native_buf_fd = -1;
   int native_buf_stride = 0;
   int native_buf_size = 0;

   if (native_buffer != NULL) {
      VkResult result = v3dv_gralloc_info(device, native_buffer, &native_buf_fd,
                                          &native_buf_stride, &native_buf_size, &modifier);
      if (result != VK_SUCCESS) {
         vk_image_destroy(&device->vk, pAllocator, &image->vk);
         return result;
      }

      if (modifier != DRM_FORMAT_MOD_BROADCOM_UIF)
         tiling = VK_IMAGE_TILING_LINEAR;
   }
#endif

   const struct v3dv_format *format =
      v3dv_X(device, get_format)(pCreateInfo->format);
   v3dv_assert(format != NULL && format->supported);

   assert(pCreateInfo->samples == VK_SAMPLE_COUNT_1_BIT ||
          pCreateInfo->samples == VK_SAMPLE_COUNT_4_BIT);

   image->format = format;
   image->cpp = vk_format_get_blocksize(image->vk.format);
   image->tiled = tiling == VK_IMAGE_TILING_OPTIMAL ||
                  (tiling == VK_IMAGE_TILING_DRM_FORMAT_MODIFIER_EXT &&
                   modifier != DRM_FORMAT_MOD_LINEAR);

   image->vk.tiling = tiling;
   image->vk.drm_format_mod = modifier;

   /* Our meta paths can create image views with compatible formats for any
    * image, so always set this flag to keep the common Vulkan image code
    * happy.
    */
   image->vk.create_flags |= VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT;

   v3d_setup_slices(image);

#ifdef ANDROID
   if (native_buffer != NULL) {
      image->slices[0].stride = native_buf_stride;
      image->slices[0].size = image->size = native_buf_size;

      VkResult result = v3dv_import_native_buffer_fd(v3dv_device_to_handle(device),
                                                     native_buf_fd, pAllocator,
                                                     v3dv_image_to_handle(image));
      if (result != VK_SUCCESS) {
         vk_object_free(&device->vk, pAllocator, image);
         return result;
      }
   }
#endif

   *pImage = v3dv_image_to_handle(image);

   return VK_SUCCESS;
}

static VkResult
create_image_from_swapchain(struct v3dv_device *device,
                            const VkImageCreateInfo *pCreateInfo,
                            const VkImageSwapchainCreateInfoKHR *swapchain_info,
                            const VkAllocationCallbacks *pAllocator,
                            VkImage *pImage)
{
   struct v3dv_image *swapchain_image =
      v3dv_wsi_get_image_from_swapchain(swapchain_info->swapchain, 0);
   assert(swapchain_image);

   VkImageCreateInfo local_create_info = *pCreateInfo;
   local_create_info.pNext = NULL;

   /* Added by wsi code. */
   local_create_info.usage |= VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;

   /* The spec requires TILING_OPTIMAL as input, but the swapchain image may
    * privately use a different tiling.  See spec anchor
    * #swapchain-wsi-image-create-info .
    */
   assert(local_create_info.tiling == VK_IMAGE_TILING_OPTIMAL);
   local_create_info.tiling = swapchain_image->vk.tiling;

   VkImageDrmFormatModifierListCreateInfoEXT local_modifier_info = {
      .sType = VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_LIST_CREATE_INFO_EXT,
      .drmFormatModifierCount = 1,
      .pDrmFormatModifiers = &swapchain_image->vk.drm_format_mod,
   };

   if (swapchain_image->vk.drm_format_mod != DRM_FORMAT_MOD_INVALID)
      __vk_append_struct(&local_create_info, &local_modifier_info);

   assert(swapchain_image->vk.image_type == local_create_info.imageType);
   assert(swapchain_image->vk.format == local_create_info.format);
   assert(swapchain_image->vk.extent.width == local_create_info.extent.width);
   assert(swapchain_image->vk.extent.height == local_create_info.extent.height);
   assert(swapchain_image->vk.extent.depth == local_create_info.extent.depth);
   assert(swapchain_image->vk.array_layers == local_create_info.arrayLayers);
   assert(swapchain_image->vk.samples == local_create_info.samples);
   assert(swapchain_image->vk.tiling == local_create_info.tiling);
   assert((swapchain_image->vk.usage & local_create_info.usage) ==
          local_create_info.usage);

   return create_image(device, &local_create_info, pAllocator, pImage);
}

VKAPI_ATTR VkResult VKAPI_CALL
v3dv_CreateImage(VkDevice _device,
                 const VkImageCreateInfo *pCreateInfo,
                 const VkAllocationCallbacks *pAllocator,
                 VkImage *pImage)
{
   V3DV_FROM_HANDLE(v3dv_device, device, _device);

   const VkImageSwapchainCreateInfoKHR *swapchain_info =
      vk_find_struct_const(pCreateInfo->pNext, IMAGE_SWAPCHAIN_CREATE_INFO_KHR);
   if (swapchain_info && swapchain_info->swapchain != VK_NULL_HANDLE)
      return create_image_from_swapchain(device, pCreateInfo, swapchain_info,
                                         pAllocator, pImage);

   return create_image(device, pCreateInfo, pAllocator, pImage);
}

VKAPI_ATTR void VKAPI_CALL
v3dv_GetImageSubresourceLayout(VkDevice device,
                               VkImage _image,
                               const VkImageSubresource *subresource,
                               VkSubresourceLayout *layout)
{
   V3DV_FROM_HANDLE(v3dv_image, image, _image);

   const struct v3d_resource_slice *slice =
      &image->slices[subresource->mipLevel];
   layout->offset =
      v3dv_layer_offset(image, subresource->mipLevel, subresource->arrayLayer) -
      image->mem_offset;
   layout->rowPitch = slice->stride;
   layout->depthPitch = image->cube_map_stride;
   layout->arrayPitch = image->cube_map_stride;

   if (image->vk.image_type != VK_IMAGE_TYPE_3D) {
      layout->size = slice->size;
   } else {
      /* For 3D images, the size of the slice represents the size of a 2D slice
       * in the 3D image, so we have to multiply by the depth extent of the
       * miplevel. For levels other than the first, we just compute the size
       * as the distance between consecutive levels (notice that mip levels are
       * arranged in memory from last to first).
       */
      if (subresource->mipLevel == 0) {
         layout->size = slice->size * image->vk.extent.depth;
      } else {
            const struct v3d_resource_slice *prev_slice =
               &image->slices[subresource->mipLevel - 1];
            layout->size = prev_slice->offset - slice->offset;
      }
   }
}

VKAPI_ATTR void VKAPI_CALL
v3dv_DestroyImage(VkDevice _device,
                  VkImage _image,
                  const VkAllocationCallbacks* pAllocator)
{
   V3DV_FROM_HANDLE(v3dv_device, device, _device);
   V3DV_FROM_HANDLE(v3dv_image, image, _image);

   if (image == NULL)
      return;

#ifdef ANDROID
   if (image->is_native_buffer_memory)
      v3dv_FreeMemory(_device,  v3dv_device_memory_to_handle(image->mem), pAllocator);
#endif

   vk_image_destroy(&device->vk, pAllocator, &image->vk);
}

VkImageViewType
v3dv_image_type_to_view_type(VkImageType type)
{
   switch (type) {
   case VK_IMAGE_TYPE_1D: return VK_IMAGE_VIEW_TYPE_1D;
   case VK_IMAGE_TYPE_2D: return VK_IMAGE_VIEW_TYPE_2D;
   case VK_IMAGE_TYPE_3D: return VK_IMAGE_VIEW_TYPE_3D;
   default:
      unreachable("Invalid image type");
   }
}

static VkResult
create_image_view(struct v3dv_device *device,
                  bool driver_internal,
                  const VkImageViewCreateInfo *pCreateInfo,
                  const VkAllocationCallbacks *pAllocator,
                  VkImageView *pView)
{
   V3DV_FROM_HANDLE(v3dv_image, image, pCreateInfo->image);
   struct v3dv_image_view *iview;

   iview = vk_image_view_create(&device->vk, driver_internal, pCreateInfo,
                                pAllocator, sizeof(*iview));
   if (iview == NULL)
      return vk_error(device, VK_ERROR_OUT_OF_HOST_MEMORY);

   const VkImageSubresourceRange *range = &pCreateInfo->subresourceRange;

   iview->offset = v3dv_layer_offset(image, iview->vk.base_mip_level,
                                     iview->vk.base_array_layer);

   /* If we have D24S8 format but the view only selects the stencil aspect
    * we want to re-interpret the format as RGBA8_UINT, then map our stencil
    * data reads to the R component and ignore the GBA channels that contain
    * the depth aspect data.
    */
   VkFormat format;
   uint8_t image_view_swizzle[4];
   if (pCreateInfo->format == VK_FORMAT_D24_UNORM_S8_UINT &&
       range->aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT) {
      format = VK_FORMAT_R8G8B8A8_UINT;
      image_view_swizzle[0] = PIPE_SWIZZLE_X;
      image_view_swizzle[1] = PIPE_SWIZZLE_0;
      image_view_swizzle[2] = PIPE_SWIZZLE_0;
      image_view_swizzle[3] = PIPE_SWIZZLE_1;
   } else {
      format = pCreateInfo->format;

      /* FIXME: we are doing this vk to pipe swizzle mapping just to call
       * util_format_compose_swizzles. Would be good to check if it would be
       * better to reimplement the latter using vk component
       */
      vk_component_mapping_to_pipe_swizzle(iview->vk.swizzle,
                                           image_view_swizzle);
   }

   iview->vk.view_format = format;
   iview->format = v3dv_X(device, get_format)(format);
   assert(iview->format && iview->format->supported);

   if (vk_format_is_depth_or_stencil(iview->vk.view_format)) {
      iview->internal_type =
         v3dv_X(device, get_internal_depth_type)(iview->vk.view_format);
   } else {
      v3dv_X(device, get_internal_type_bpp_for_output_format)
         (iview->format->rt_type, &iview->internal_type, &iview->internal_bpp);
   }

   const uint8_t *format_swizzle = v3dv_get_format_swizzle(device, format);
   util_format_compose_swizzles(format_swizzle, image_view_swizzle,
                                iview->swizzle);

   iview->swap_rb = v3dv_format_swizzle_needs_rb_swap(iview->swizzle);
   iview->channel_reverse = v3dv_format_swizzle_needs_reverse(iview->swizzle);

   v3dv_X(device, pack_texture_shader_state)(device, iview);

   *pView = v3dv_image_view_to_handle(iview);

   return VK_SUCCESS;
}

VkResult
v3dv_create_image_view(struct v3dv_device *device,
                       const VkImageViewCreateInfo *pCreateInfo,
                       VkImageView *pView)
{
   return create_image_view(device, true, pCreateInfo, NULL, pView);
}

VKAPI_ATTR VkResult VKAPI_CALL
v3dv_CreateImageView(VkDevice _device,
                     const VkImageViewCreateInfo *pCreateInfo,
                     const VkAllocationCallbacks *pAllocator,
                     VkImageView *pView)
{
   V3DV_FROM_HANDLE(v3dv_device, device, _device);

   return create_image_view(device, false, pCreateInfo, pAllocator, pView);
}

VKAPI_ATTR void VKAPI_CALL
v3dv_DestroyImageView(VkDevice _device,
                      VkImageView imageView,
                      const VkAllocationCallbacks* pAllocator)
{
   V3DV_FROM_HANDLE(v3dv_device, device, _device);
   V3DV_FROM_HANDLE(v3dv_image_view, image_view, imageView);

   if (image_view == NULL)
      return;

   vk_image_view_destroy(&device->vk, pAllocator, &image_view->vk);
}

VKAPI_ATTR VkResult VKAPI_CALL
v3dv_CreateBufferView(VkDevice _device,
                      const VkBufferViewCreateInfo *pCreateInfo,
                      const VkAllocationCallbacks *pAllocator,
                      VkBufferView *pView)
{
   V3DV_FROM_HANDLE(v3dv_device, device, _device);

   struct v3dv_buffer *buffer =
      v3dv_buffer_from_handle(pCreateInfo->buffer);

   struct v3dv_buffer_view *view =
      vk_object_zalloc(&device->vk, pAllocator, sizeof(*view),
                       VK_OBJECT_TYPE_BUFFER_VIEW);
   if (!view)
      return vk_error(device, VK_ERROR_OUT_OF_HOST_MEMORY);

   uint32_t range;
   if (pCreateInfo->range == VK_WHOLE_SIZE)
      range = buffer->size - pCreateInfo->offset;
   else
      range = pCreateInfo->range;

   enum pipe_format pipe_format = vk_format_to_pipe_format(pCreateInfo->format);
   uint32_t num_elements = range / util_format_get_blocksize(pipe_format);

   view->buffer = buffer;
   view->offset = pCreateInfo->offset;
   view->size = view->offset + range;
   view->num_elements = num_elements;
   view->vk_format = pCreateInfo->format;
   view->format = v3dv_X(device, get_format)(view->vk_format);

   v3dv_X(device, get_internal_type_bpp_for_output_format)
      (view->format->rt_type, &view->internal_type, &view->internal_bpp);

   if (buffer->usage & VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT ||
       buffer->usage & VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT)
      v3dv_X(device, pack_texture_shader_state_from_buffer_view)(device, view);

   *pView = v3dv_buffer_view_to_handle(view);

   return VK_SUCCESS;
}

VKAPI_ATTR void VKAPI_CALL
v3dv_DestroyBufferView(VkDevice _device,
                       VkBufferView bufferView,
                       const VkAllocationCallbacks *pAllocator)
{
   V3DV_FROM_HANDLE(v3dv_device, device, _device);
   V3DV_FROM_HANDLE(v3dv_buffer_view, buffer_view, bufferView);

   if (buffer_view == NULL)
      return;

   vk_object_free(&device->vk, pAllocator, buffer_view);
}