path: root/src/vulkan/anv_cmd_buffer.c

/*
 * Copyright © 2015 Intel Corporation
 *
 * 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 <assert.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>

#include "anv_private.h"

/** \file anv_cmd_buffer.c
 *
 * This file contains all of the stuff for emitting commands into a command
 * buffer.  This includes implementations of most of the vkCmd*
 * entrypoints.  This file is concerned entirely with state emission and
 * not with the command buffer data structure itself.  As far as this file
 * is concerned, most of anv_cmd_buffer is magic.
 */

static void
anv_cmd_state_init(struct anv_cmd_state *state)
{
   state->rs_state = NULL;
   state->vp_state = NULL;
   state->cb_state = NULL;
   state->ds_state = NULL;
   memset(&state->state_vf, 0, sizeof(state->state_vf));
   memset(&state->descriptors, 0, sizeof(state->descriptors));
   memset(&state->push_constants, 0, sizeof(state->push_constants));

   state->dirty = 0;
   state->vb_dirty = 0;
   state->descriptors_dirty = 0;
   state->push_constants_dirty = 0;
   state->pipeline = NULL;
   state->vp_state = NULL;
   state->rs_state = NULL;
   state->ds_state = NULL;

   state->gen7.index_buffer = NULL;
}

static VkResult
anv_cmd_buffer_ensure_push_constants_size(struct anv_cmd_buffer *cmd_buffer,
                                          VkShaderStage stage, uint32_t size)
{
   struct anv_push_constants **ptr = &cmd_buffer->state.push_constants[stage];

   if (*ptr == NULL) {
      *ptr = anv_device_alloc(cmd_buffer->device, size, 8,
                              VK_SYSTEM_ALLOC_TYPE_INTERNAL);
      if (*ptr == NULL)
         return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
      (*ptr)->size = size;
   } else if ((*ptr)->size < size) {
      void *new_data = anv_device_alloc(cmd_buffer->device, size, 8,
                                        VK_SYSTEM_ALLOC_TYPE_INTERNAL);
      if (new_data == NULL)
         return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);

      memcpy(new_data, *ptr, (*ptr)->size);
      anv_device_free(cmd_buffer->device, *ptr);

      *ptr = new_data;
      (*ptr)->size = size;
   }

   return VK_SUCCESS;
}

#define anv_cmd_buffer_ensure_push_constant_field(cmd_buffer, stage, field) \
   anv_cmd_buffer_ensure_push_constants_size(cmd_buffer, stage, \
      (offsetof(struct anv_push_constants, field) + \
       sizeof(cmd_buffer->state.push_constants[0]->field)))

VkResult anv_CreateCommandBuffer(
    VkDevice                                    _device,
    const VkCmdBufferCreateInfo*                pCreateInfo,
    VkCmdBuffer*                                pCmdBuffer)
{
   ANV_FROM_HANDLE(anv_device, device, _device);
   ANV_FROM_HANDLE(anv_cmd_pool, pool, pCreateInfo->cmdPool);
   struct anv_cmd_buffer *cmd_buffer;
   VkResult result;

   cmd_buffer = anv_device_alloc(device, sizeof(*cmd_buffer), 8,
                                 VK_SYSTEM_ALLOC_TYPE_API_OBJECT);
   if (cmd_buffer == NULL)
      return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);

   cmd_buffer->_loader_data.loaderMagic = ICD_LOADER_MAGIC;
   cmd_buffer->device = device;

   result = anv_cmd_buffer_init_batch_bo_chain(cmd_buffer);
   if (result != VK_SUCCESS)
      goto fail;

   anv_state_stream_init(&cmd_buffer->surface_state_stream,
                         &device->surface_state_block_pool);
   anv_state_stream_init(&cmd_buffer->dynamic_state_stream,
                         &device->dynamic_state_block_pool);

   cmd_buffer->level = pCreateInfo->level;
   cmd_buffer->opt_flags = 0;

   anv_cmd_state_init(&cmd_buffer->state);

   if (pool) {
      list_addtail(&cmd_buffer->pool_link, &pool->cmd_buffers);
   } else {
      /* Init the pool_link so we can safefly call list_del when we destroy
       * the command buffer
       */
      list_inithead(&cmd_buffer->pool_link);
   }

   *pCmdBuffer = anv_cmd_buffer_to_handle(cmd_buffer);

   return VK_SUCCESS;

 fail: anv_device_free(device, cmd_buffer);

   return result;
}

VkResult anv_DestroyCommandBuffer(
    VkDevice                                    _device,
    VkCmdBuffer                                 _cmd_buffer)
{
   ANV_FROM_HANDLE(anv_device, device, _device);
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, _cmd_buffer);

   list_del(&cmd_buffer->pool_link);

   anv_cmd_buffer_fini_batch_bo_chain(cmd_buffer);

   anv_state_stream_finish(&cmd_buffer->surface_state_stream);
   anv_state_stream_finish(&cmd_buffer->dynamic_state_stream);
   anv_device_free(device, cmd_buffer);

   return VK_SUCCESS;
}

VkResult anv_ResetCommandBuffer(
    VkCmdBuffer                                 cmdBuffer,
    VkCmdBufferResetFlags                       flags)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);

   anv_cmd_buffer_reset_batch_bo_chain(cmd_buffer);

   anv_cmd_state_init(&cmd_buffer->state);

   return VK_SUCCESS;
}

void
anv_cmd_buffer_emit_state_base_address(struct anv_cmd_buffer *cmd_buffer)
{
   switch (cmd_buffer->device->info.gen) {
   case 7:
      return gen7_cmd_buffer_emit_state_base_address(cmd_buffer);
   case 8:
      return gen8_cmd_buffer_emit_state_base_address(cmd_buffer);
   default:
      unreachable("unsupported gen\n");
   }
}

VkResult anv_BeginCommandBuffer(
    VkCmdBuffer                                 cmdBuffer,
    const VkCmdBufferBeginInfo*                 pBeginInfo)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);

   cmd_buffer->opt_flags = pBeginInfo->flags;

   if (cmd_buffer->level == VK_CMD_BUFFER_LEVEL_SECONDARY) {
      cmd_buffer->state.framebuffer =
         anv_framebuffer_from_handle(pBeginInfo->framebuffer);
      cmd_buffer->state.pass =
         anv_render_pass_from_handle(pBeginInfo->renderPass);

      /* FIXME: We shouldn't be starting on the first subpass */
      anv_cmd_buffer_begin_subpass(cmd_buffer,
                                   &cmd_buffer->state.pass->subpasses[0]);
   }

   anv_cmd_buffer_emit_state_base_address(cmd_buffer);
   cmd_buffer->state.current_pipeline = UINT32_MAX;

   return VK_SUCCESS;
}

VkResult anv_EndCommandBuffer(
    VkCmdBuffer                                 cmdBuffer)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   struct anv_device *device = cmd_buffer->device;

   anv_cmd_buffer_end_batch_buffer(cmd_buffer);

   if (cmd_buffer->level == VK_CMD_BUFFER_LEVEL_PRIMARY) {
      /* The algorithm used to compute the validate list is not threadsafe as
       * it uses the bo->index field.  We have to lock the device around it.
       * Fortunately, the chances for contention here are probably very low.
       */
      pthread_mutex_lock(&device->mutex);
      anv_cmd_buffer_prepare_execbuf(cmd_buffer);
      pthread_mutex_unlock(&device->mutex);
   }

   return VK_SUCCESS;
}

void anv_CmdBindPipeline(
    VkCmdBuffer                                 cmdBuffer,
    VkPipelineBindPoint                         pipelineBindPoint,
    VkPipeline                                  _pipeline)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   ANV_FROM_HANDLE(anv_pipeline, pipeline, _pipeline);

   switch (pipelineBindPoint) {
   case VK_PIPELINE_BIND_POINT_COMPUTE:
      cmd_buffer->state.compute_pipeline = pipeline;
      cmd_buffer->state.compute_dirty |= ANV_CMD_BUFFER_PIPELINE_DIRTY;
      cmd_buffer->state.push_constants_dirty |= VK_SHADER_STAGE_COMPUTE_BIT;
      break;

   case VK_PIPELINE_BIND_POINT_GRAPHICS:
      cmd_buffer->state.pipeline = pipeline;
      cmd_buffer->state.vb_dirty |= pipeline->vb_used;
      cmd_buffer->state.dirty |= ANV_CMD_BUFFER_PIPELINE_DIRTY;
      cmd_buffer->state.push_constants_dirty |= pipeline->active_stages;
      break;

   default:
      assert(!"invalid bind point");
      break;
   }
}

void anv_CmdBindDynamicViewportState(
    VkCmdBuffer                                 cmdBuffer,
    VkDynamicViewportState                      dynamicViewportState)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   ANV_FROM_HANDLE(anv_dynamic_vp_state, vp_state, dynamicViewportState);

   cmd_buffer->state.vp_state = vp_state;
   cmd_buffer->state.dirty |= ANV_CMD_BUFFER_VP_DIRTY;
}

void anv_CmdBindDynamicRasterState(
    VkCmdBuffer                                 cmdBuffer,
    VkDynamicRasterState                        dynamicRasterState)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   ANV_FROM_HANDLE(anv_dynamic_rs_state, rs_state, dynamicRasterState);

   cmd_buffer->state.rs_state = rs_state;
   cmd_buffer->state.dirty |= ANV_CMD_BUFFER_RS_DIRTY;
}

void anv_CmdBindDynamicColorBlendState(
    VkCmdBuffer                                 cmdBuffer,
    VkDynamicColorBlendState                    dynamicColorBlendState)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   ANV_FROM_HANDLE(anv_dynamic_cb_state, cb_state, dynamicColorBlendState);

   cmd_buffer->state.cb_state = cb_state;
   cmd_buffer->state.dirty |= ANV_CMD_BUFFER_CB_DIRTY;
}

void anv_CmdBindDynamicDepthStencilState(
    VkCmdBuffer                                 cmdBuffer,
    VkDynamicDepthStencilState                  dynamicDepthStencilState)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   ANV_FROM_HANDLE(anv_dynamic_ds_state, ds_state, dynamicDepthStencilState);

   cmd_buffer->state.ds_state = ds_state;
   cmd_buffer->state.dirty |= ANV_CMD_BUFFER_DS_DIRTY;
}

void anv_CmdBindDescriptorSets(
    VkCmdBuffer                                 cmdBuffer,
    VkPipelineBindPoint                         pipelineBindPoint,
    VkPipelineLayout                            _layout,
    uint32_t                                    firstSet,
    uint32_t                                    setCount,
    const VkDescriptorSet*                      pDescriptorSets,
    uint32_t                                    dynamicOffsetCount,
    const uint32_t*                             pDynamicOffsets)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   ANV_FROM_HANDLE(anv_pipeline_layout, layout, _layout);
   struct anv_descriptor_set_layout *set_layout;

   assert(firstSet + setCount < MAX_SETS);

   uint32_t dynamic_slot = 0;
   for (uint32_t i = 0; i < setCount; i++) {
      ANV_FROM_HANDLE(anv_descriptor_set, set, pDescriptorSets[i]);
      set_layout = layout->set[firstSet + i].layout;

      if (cmd_buffer->state.descriptors[firstSet + i].set != set) {
         cmd_buffer->state.descriptors[firstSet + i].set = set;
         cmd_buffer->state.descriptors_dirty |= set_layout->shader_stages;
      }

      if (set_layout->num_dynamic_buffers > 0) {
         VkShaderStage s;
         for_each_bit(s, set_layout->shader_stages) {
            anv_cmd_buffer_ensure_push_constant_field(cmd_buffer, s,
                                                      dynamic_offsets);
            uint32_t *offsets =
               cmd_buffer->state.push_constants[s]->dynamic_offsets +
               layout->set[firstSet + i].dynamic_offset_start;

            memcpy(offsets, pDynamicOffsets + dynamic_slot,
                   set_layout->num_dynamic_buffers * sizeof(*pDynamicOffsets));

         }
         cmd_buffer->state.push_constants_dirty |= set_layout->shader_stages;

         dynamic_slot += set_layout->num_dynamic_buffers;
      }
   }
}

void anv_CmdBindVertexBuffers(
    VkCmdBuffer                                 cmdBuffer,
    uint32_t                                    startBinding,
    uint32_t                                    bindingCount,
    const VkBuffer*                             pBuffers,
    const VkDeviceSize*                         pOffsets)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   struct anv_vertex_binding *vb = cmd_buffer->state.vertex_bindings;

   /* We have to defer setting up vertex buffer since we need the buffer
    * stride from the pipeline. */

   assert(startBinding + bindingCount < MAX_VBS);
   for (uint32_t i = 0; i < bindingCount; i++) {
      vb[startBinding + i].buffer = anv_buffer_from_handle(pBuffers[i]);
      vb[startBinding + i].offset = pOffsets[i];
      cmd_buffer->state.vb_dirty |= 1 << (startBinding + i);
   }
}

static void
add_surface_state_reloc(struct anv_cmd_buffer *cmd_buffer,
                        struct anv_state state, struct anv_bo *bo, uint32_t offset)
{
   /* The address goes in SURFACE_STATE dword 1 for gens < 8 and dwords 8 and
    * 9 for gen8+.  We only write the first dword for gen8+ here and rely on
    * the initial state to set the high bits to 0. */

   const uint32_t dword = cmd_buffer->device->info.gen < 8 ? 1 : 8;

   anv_reloc_list_add(&cmd_buffer->surface_relocs, cmd_buffer->device,
                      state.offset + dword * 4, bo, offset);
}

VkResult
anv_cmd_buffer_emit_binding_table(struct anv_cmd_buffer *cmd_buffer,
                                  VkShaderStage stage, struct anv_state *bt_state)
{
   struct anv_framebuffer *fb = cmd_buffer->state.framebuffer;
   struct anv_subpass *subpass = cmd_buffer->state.subpass;
   struct anv_pipeline_layout *layout;
   uint32_t attachments, bias, state_offset;

   if (stage == VK_SHADER_STAGE_COMPUTE)
      layout = cmd_buffer->state.compute_pipeline->layout;
   else
      layout = cmd_buffer->state.pipeline->layout;

   if (stage == VK_SHADER_STAGE_FRAGMENT) {
      bias = MAX_RTS;
      attachments = subpass->color_count;
   } else {
      bias = 0;
      attachments = 0;
   }

   /* This is a little awkward: layout can be NULL but we still have to
    * allocate and set a binding table for the PS stage for render
    * targets. */
   uint32_t surface_count = layout ? layout->stage[stage].surface_count : 0;

   if (attachments + surface_count == 0)
      return VK_SUCCESS;

   *bt_state = anv_cmd_buffer_alloc_binding_table(cmd_buffer,
                                                  bias + surface_count,
                                                  &state_offset);
   uint32_t *bt_map = bt_state->map;

   if (bt_state->map == NULL)
      return VK_ERROR_OUT_OF_DEVICE_MEMORY;

   /* This is highly annoying.  The Vulkan spec puts the depth-stencil
    * attachments in with the color attachments.  Unfortunately, thanks to
    * other aspects of the API, we cana't really saparate them before this
    * point.  Therefore, we have to walk all of the attachments but only
    * put the color attachments into the binding table.
    */
   for (uint32_t a = 0; a < attachments; a++) {
      const struct anv_attachment_view *aview =
         fb->attachments[subpass->color_attachments[a]];

      assert(aview->attachment_type == ANV_ATTACHMENT_VIEW_TYPE_COLOR);

      const struct anv_color_attachment_view *cview =
         (const struct anv_color_attachment_view *) aview;

      const struct anv_surface_view *sview = &cview->surface_view;

      bt_map[a] = sview->surface_state.offset + state_offset;
      add_surface_state_reloc(cmd_buffer, sview->surface_state,
                              sview->bo, sview->offset);
   }

   if (layout == NULL)
      return VK_SUCCESS;

   for (uint32_t set = 0; set < layout->num_sets; set++) {
      struct anv_descriptor_set_binding *d = &cmd_buffer->state.descriptors[set];
      struct anv_descriptor_set_layout *set_layout = layout->set[set].layout;
      struct anv_descriptor_slot *surface_slots =
         set_layout->stage[stage].surface_start;

      uint32_t start = bias + layout->set[set].stage[stage].surface_start;

      for (uint32_t b = 0; b < set_layout->stage[stage].surface_count; b++) {
         struct anv_descriptor *desc =
            &d->set->descriptors[surface_slots[b].index];

         if (desc->type != ANV_DESCRIPTOR_TYPE_SURFACE_VIEW)
            continue;

         const struct anv_surface_view *sview = desc->surface_view;

         bt_map[start + b] = sview->surface_state.offset + state_offset;
         add_surface_state_reloc(cmd_buffer, sview->surface_state,
                                 sview->bo, sview->offset);
      }
   }

   return VK_SUCCESS;
}

VkResult
anv_cmd_buffer_emit_samplers(struct anv_cmd_buffer *cmd_buffer,
                             VkShaderStage stage, struct anv_state *state)
{
   struct anv_pipeline_layout *layout;
   uint32_t sampler_count;

   if (stage == VK_SHADER_STAGE_COMPUTE)
      layout = cmd_buffer->state.compute_pipeline->layout;
   else
      layout = cmd_buffer->state.pipeline->layout;

   sampler_count = layout ? layout->stage[stage].sampler_count : 0;
   if (sampler_count == 0)
      return VK_SUCCESS;

   uint32_t size = sampler_count * 16;
   *state = anv_cmd_buffer_alloc_dynamic_state(cmd_buffer, size, 32);

   if (state->map == NULL)
      return VK_ERROR_OUT_OF_DEVICE_MEMORY;

   for (uint32_t set = 0; set < layout->num_sets; set++) {
      struct anv_descriptor_set_binding *d = &cmd_buffer->state.descriptors[set];
      struct anv_descriptor_set_layout *set_layout = layout->set[set].layout;
      struct anv_descriptor_slot *sampler_slots =
         set_layout->stage[stage].sampler_start;

      uint32_t start = layout->set[set].stage[stage].sampler_start;

      for (uint32_t b = 0; b < set_layout->stage[stage].sampler_count; b++) {
         struct anv_descriptor *desc =
            &d->set->descriptors[sampler_slots[b].index];

         if (desc->type != ANV_DESCRIPTOR_TYPE_SAMPLER)
            continue;

         struct anv_sampler *sampler = desc->sampler;

         memcpy(state->map + (start + b) * 16,
                sampler->state, sizeof(sampler->state));
      }
   }

   return VK_SUCCESS;
}

static VkResult
flush_descriptor_set(struct anv_cmd_buffer *cmd_buffer, VkShaderStage stage)
{
   struct anv_state surfaces = { 0, }, samplers = { 0, };
   VkResult result;

   result = anv_cmd_buffer_emit_samplers(cmd_buffer, stage, &samplers);
   if (result != VK_SUCCESS)
      return result;
   result = anv_cmd_buffer_emit_binding_table(cmd_buffer, stage, &surfaces);
   if (result != VK_SUCCESS)
      return result;

   static const uint32_t sampler_state_opcodes[] = {
      [VK_SHADER_STAGE_VERTEX]                  = 43,
      [VK_SHADER_STAGE_TESS_CONTROL]            = 44, /* HS */
      [VK_SHADER_STAGE_TESS_EVALUATION]         = 45, /* DS */
      [VK_SHADER_STAGE_GEOMETRY]                = 46,
      [VK_SHADER_STAGE_FRAGMENT]                = 47,
      [VK_SHADER_STAGE_COMPUTE]                 = 0,
   };

   static const uint32_t binding_table_opcodes[] = {
      [VK_SHADER_STAGE_VERTEX]                  = 38,
      [VK_SHADER_STAGE_TESS_CONTROL]            = 39,
      [VK_SHADER_STAGE_TESS_EVALUATION]         = 40,
      [VK_SHADER_STAGE_GEOMETRY]                = 41,
      [VK_SHADER_STAGE_FRAGMENT]                = 42,
      [VK_SHADER_STAGE_COMPUTE]                 = 0,
   };

   if (samplers.alloc_size > 0) {
      anv_batch_emit(&cmd_buffer->batch,
                     GEN7_3DSTATE_SAMPLER_STATE_POINTERS_VS,
                     ._3DCommandSubOpcode  = sampler_state_opcodes[stage],
                     .PointertoVSSamplerState = samplers.offset);
   }

   if (surfaces.alloc_size > 0) {
      anv_batch_emit(&cmd_buffer->batch,
                     GEN7_3DSTATE_BINDING_TABLE_POINTERS_VS,
                     ._3DCommandSubOpcode  = binding_table_opcodes[stage],
                     .PointertoVSBindingTable = surfaces.offset);
   }

   return VK_SUCCESS;
}

void
anv_flush_descriptor_sets(struct anv_cmd_buffer *cmd_buffer)
{
   VkShaderStage s;
   VkShaderStageFlags dirty = cmd_buffer->state.descriptors_dirty &
                              cmd_buffer->state.pipeline->active_stages;

   VkResult result = VK_SUCCESS;
   for_each_bit(s, dirty) {
      result = flush_descriptor_set(cmd_buffer, s);
      if (result != VK_SUCCESS)
         break;
   }

   if (result != VK_SUCCESS) {
      assert(result == VK_ERROR_OUT_OF_DEVICE_MEMORY);

      result = anv_cmd_buffer_new_binding_table_block(cmd_buffer);
      assert(result == VK_SUCCESS);

      /* Re-emit state base addresses so we get the new surface state base
       * address before we start emitting binding tables etc.
       */
      anv_cmd_buffer_emit_state_base_address(cmd_buffer);

      /* Re-emit all active binding tables */
      for_each_bit(s, cmd_buffer->state.pipeline->active_stages) {
         result = flush_descriptor_set(cmd_buffer, s);

         /* It had better succeed this time */
         assert(result == VK_SUCCESS);
      }
   }

   cmd_buffer->state.descriptors_dirty &= ~cmd_buffer->state.pipeline->active_stages;
}

struct anv_state
anv_cmd_buffer_emit_dynamic(struct anv_cmd_buffer *cmd_buffer,
                             uint32_t *a, uint32_t dwords, uint32_t alignment)
{
   struct anv_state state;

   state = anv_cmd_buffer_alloc_dynamic_state(cmd_buffer,
                                              dwords * 4, alignment);
   memcpy(state.map, a, dwords * 4);

   VG(VALGRIND_CHECK_MEM_IS_DEFINED(state.map, dwords * 4));

   return state;
}

struct anv_state
anv_cmd_buffer_merge_dynamic(struct anv_cmd_buffer *cmd_buffer,
                             uint32_t *a, uint32_t *b,
                             uint32_t dwords, uint32_t alignment)
{
   struct anv_state state;
   uint32_t *p;

   state = anv_cmd_buffer_alloc_dynamic_state(cmd_buffer,
                                              dwords * 4, alignment);
   p = state.map;
   for (uint32_t i = 0; i < dwords; i++)
      p[i] = a[i] | b[i];

   VG(VALGRIND_CHECK_MEM_IS_DEFINED(p, dwords * 4));

   return state;
}

void
anv_cmd_buffer_begin_subpass(struct anv_cmd_buffer *cmd_buffer,
                             struct anv_subpass *subpass)
{
   switch (cmd_buffer->device->info.gen) {
   case 7:
      gen7_cmd_buffer_begin_subpass(cmd_buffer, subpass);
      break;
   case 8:
      gen8_cmd_buffer_begin_subpass(cmd_buffer, subpass);
      break;
   default:
      unreachable("unsupported gen\n");
   }
}

void anv_CmdSetEvent(
    VkCmdBuffer                                 cmdBuffer,
    VkEvent                                     event,
    VkPipelineStageFlags                        stageMask)
{
   stub();
}

void anv_CmdResetEvent(
    VkCmdBuffer                                 cmdBuffer,
    VkEvent                                     event,
    VkPipelineStageFlags                        stageMask)
{
   stub();
}

void anv_CmdWaitEvents(
    VkCmdBuffer                                 cmdBuffer,
    uint32_t                                    eventCount,
    const VkEvent*                              pEvents,
    VkPipelineStageFlags                        srcStageMask,
    VkPipelineStageFlags                        destStageMask,
    uint32_t                                    memBarrierCount,
    const void* const*                          ppMemBarriers)
{
   stub();
}

struct anv_state
anv_cmd_buffer_push_constants(struct anv_cmd_buffer *cmd_buffer,
                              VkShaderStage stage)
{
   struct anv_push_constants *data =
      cmd_buffer->state.push_constants[stage];
   struct brw_stage_prog_data *prog_data =
      cmd_buffer->state.pipeline->prog_data[stage];

   /* If we don't actually have any push constants, bail. */
   if (data == NULL || prog_data->nr_params == 0)
      return (struct anv_state) { .offset = 0 };

   struct anv_state state =
      anv_cmd_buffer_alloc_dynamic_state(cmd_buffer,
                                         prog_data->nr_params * sizeof(float),
                                         32 /* bottom 5 bits MBZ */);

   /* Walk through the param array and fill the buffer with data */
   uint32_t *u32_map = state.map;
   for (unsigned i = 0; i < prog_data->nr_params; i++) {
      uint32_t offset = (uintptr_t)prog_data->param[i];
      u32_map[i] = *(uint32_t *)((uint8_t *)data + offset);
   }

   return state;
}

void anv_CmdPushConstants(
    VkCmdBuffer                                 cmdBuffer,
    VkPipelineLayout                            layout,
    VkShaderStageFlags                          stageFlags,
    uint32_t                                    start,
    uint32_t                                    length,
    const void*                                 values)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, cmd_buffer, cmdBuffer);
   VkShaderStage stage;

   for_each_bit(stage, stageFlags) {
      anv_cmd_buffer_ensure_push_constant_field(cmd_buffer, stage, client_data);

      memcpy(cmd_buffer->state.push_constants[stage]->client_data + start,
             values, length);
   }

   cmd_buffer->state.push_constants_dirty |= stageFlags;
}

void anv_CmdExecuteCommands(
    VkCmdBuffer                                 cmdBuffer,
    uint32_t                                    cmdBuffersCount,
    const VkCmdBuffer*                          pCmdBuffers)
{
   ANV_FROM_HANDLE(anv_cmd_buffer, primary, cmdBuffer);

   assert(primary->level == VK_CMD_BUFFER_LEVEL_PRIMARY);

   anv_assert(primary->state.subpass == &primary->state.pass->subpasses[0]);

   for (uint32_t i = 0; i < cmdBuffersCount; i++) {
      ANV_FROM_HANDLE(anv_cmd_buffer, secondary, pCmdBuffers[i]);

      assert(secondary->level == VK_CMD_BUFFER_LEVEL_SECONDARY);

      anv_cmd_buffer_add_secondary(primary, secondary);
   }
}

VkResult anv_CreateCommandPool(
    VkDevice                                    _device,
    const VkCmdPoolCreateInfo*                  pCreateInfo,
    VkCmdPool*                                  pCmdPool)
{
   ANV_FROM_HANDLE(anv_device, device, _device);
   struct anv_cmd_pool *pool;

   pool = anv_device_alloc(device, sizeof(*pool), 8,
                           VK_SYSTEM_ALLOC_TYPE_API_OBJECT);
   if (pool == NULL)
      return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);

   list_inithead(&pool->cmd_buffers);

   *pCmdPool = anv_cmd_pool_to_handle(pool);

   return VK_SUCCESS;
}

VkResult anv_DestroyCommandPool(
    VkDevice                                    _device,
    VkCmdPool                                   cmdPool)
{
   ANV_FROM_HANDLE(anv_device, device, _device);
   ANV_FROM_HANDLE(anv_cmd_pool, pool, cmdPool);

   anv_ResetCommandPool(_device, cmdPool, 0);

   anv_device_free(device, pool);

   return VK_SUCCESS;
}

VkResult anv_ResetCommandPool(
    VkDevice                                    device,
    VkCmdPool                                   cmdPool,
    VkCmdPoolResetFlags                         flags)
{
   ANV_FROM_HANDLE(anv_cmd_pool, pool, cmdPool);

   list_for_each_entry_safe(struct anv_cmd_buffer, cmd_buffer,
                            &pool->cmd_buffers, pool_link) {
      anv_DestroyCommandBuffer(device, anv_cmd_buffer_to_handle(cmd_buffer));
   }

   return VK_SUCCESS;
}

/**
 * Return NULL if the current subpass has no depthstencil attachment.
 */
const struct anv_depth_stencil_view *
anv_cmd_buffer_get_depth_stencil_view(const struct anv_cmd_buffer *cmd_buffer)
{
   const struct anv_subpass *subpass = cmd_buffer->state.subpass;
   const struct anv_framebuffer *fb = cmd_buffer->state.framebuffer;

   if (subpass->depth_stencil_attachment == VK_ATTACHMENT_UNUSED)
      return NULL;

   const struct anv_attachment_view *aview =
      fb->attachments[subpass->depth_stencil_attachment];

   assert(aview->attachment_type == ANV_ATTACHMENT_VIEW_TYPE_DEPTH_STENCIL);

   return (const struct anv_depth_stencil_view *) aview;
}