anv: Use DRM sync objects for external semaphores when available

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/vulkan/anv_batch_chain.c

@@ -957,6 +957,11 @@ struct anv_execbuf {
 
    /* Allocated length of the 'objects' and 'bos' arrays */
    uint32_t                                  array_length;
+
+   uint32_t                                  fence_count;
+   uint32_t                                  fence_array_length;
+   struct drm_i915_gem_exec_fence *          fences;
+   struct anv_syncobj **                     syncobjs;
 };
 
 static void
@@ -971,6 +976,8 @@ anv_execbuf_finish(struct anv_execbuf *exec,
 {
    vk_free(alloc, exec->objects);
    vk_free(alloc, exec->bos);
+   vk_free(alloc, exec->fences);
+   vk_free(alloc, exec->syncobjs);
 }
 
 static VkResult
@@ -1061,6 +1068,35 @@ anv_execbuf_add_bo(struct anv_execbuf *exec,
    return VK_SUCCESS;
 }
 
+static VkResult
+anv_execbuf_add_syncobj(struct anv_execbuf *exec,
+                        uint32_t handle, uint32_t flags,
+                        const VkAllocationCallbacks *alloc)
+{
+   assert(flags != 0);
+
+   if (exec->fence_count >= exec->fence_array_length) {
+      uint32_t new_len = MAX2(exec->fence_array_length * 2, 64);
+
+      exec->fences = vk_realloc(alloc, exec->fences,
+                                new_len * sizeof(*exec->fences),
+                                8, VK_SYSTEM_ALLOCATION_SCOPE_COMMAND);
+      if (exec->fences == NULL)
+         return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
+
+      exec->fence_array_length = new_len;
+   }
+
+   exec->fences[exec->fence_count] = (struct drm_i915_gem_exec_fence) {
+      .handle = handle,
+      .flags = flags,
+   };
+
+   exec->fence_count++;
+
+   return VK_SUCCESS;
+}
+
 static void
 anv_cmd_buffer_process_relocs(struct anv_cmd_buffer *cmd_buffer,
                               struct anv_reloc_list *list)
@@ -1448,6 +1484,14 @@ anv_cmd_buffer_execbuf(struct anv_device *device,
          impl->fd = -1;
          break;
 
+      case ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ:
+         result = anv_execbuf_add_syncobj(&execbuf, impl->syncobj,
+                                          I915_EXEC_FENCE_WAIT,
+                                          &device->alloc);
+         if (result != VK_SUCCESS)
+            return result;
+         break;
+
       default:
          break;
       }
@@ -1484,6 +1528,14 @@ anv_cmd_buffer_execbuf(struct anv_device *device,
          need_out_fence = true;
          break;
 
+      case ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ:
+         result = anv_execbuf_add_syncobj(&execbuf, impl->syncobj,
+                                          I915_EXEC_FENCE_SIGNAL,
+                                          &device->alloc);
+         if (result != VK_SUCCESS)
+            return result;
+         break;
+
       default:
          break;
       }
@@ -1497,6 +1549,13 @@ anv_cmd_buffer_execbuf(struct anv_device *device,
       setup_empty_execbuf(&execbuf, device);
    }
 
+   if (execbuf.fence_count > 0) {
+      assert(device->instance->physicalDevice.has_syncobj);
+      execbuf.execbuf.flags |= I915_EXEC_FENCE_ARRAY;
+      execbuf.execbuf.num_cliprects = execbuf.fence_count;
+      execbuf.execbuf.cliprects_ptr = (uintptr_t) execbuf.fences;
+   }
+
    if (in_fence != -1) {
       execbuf.execbuf.flags |= I915_EXEC_FENCE_IN;
       execbuf.execbuf.rsvd2 |= (uint32_t)in_fence;

src/intel/vulkan/anv_device.c

@@ -338,6 +338,7 @@ anv_physical_device_init(struct anv_physical_device *device,
 
    device->has_exec_async = anv_gem_get_param(fd, I915_PARAM_HAS_EXEC_ASYNC);
    device->has_exec_fence = anv_gem_get_param(fd, I915_PARAM_HAS_EXEC_FENCE);
+   device->has_syncobj = anv_gem_get_param(fd, I915_PARAM_HAS_EXEC_FENCE_ARRAY);
 
    bool swizzled = anv_gem_get_bit6_swizzle(fd, I915_TILING_X);
 

src/intel/vulkan/anv_private.h

@@ -653,6 +653,7 @@ struct anv_physical_device {
     int                                         cmd_parser_version;
     bool                                        has_exec_async;
     bool                                        has_exec_fence;
+    bool                                        has_syncobj;
 
     uint32_t                                    eu_total;
     uint32_t                                    subslice_total;
@@ -1742,6 +1743,7 @@ enum anv_semaphore_type {
    ANV_SEMAPHORE_TYPE_DUMMY,
    ANV_SEMAPHORE_TYPE_BO,
    ANV_SEMAPHORE_TYPE_SYNC_FILE,
+   ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ,
 };
 
 struct anv_semaphore_impl {
@@ -1760,6 +1762,12 @@ struct anv_semaphore_impl {
        * created or because it has been used for a wait, fd will be -1.
        */
       int fd;
+
+      /* Sync object handle when type == AKV_SEMAPHORE_TYPE_DRM_SYNCOBJ.
+       * Unlike GEM BOs, DRM sync objects aren't deduplicated by the kernel on
+       * import so we don't need to bother with a userspace cache.
+       */
+      uint32_t syncobj;
    };
 };
 

src/intel/vulkan/anv_queue.c

@@ -558,19 +558,27 @@ VkResult anv_CreateSemaphore(
       semaphore->permanent.type = ANV_SEMAPHORE_TYPE_DUMMY;
    } else if (handleTypes & VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT_KHR) {
       assert(handleTypes == VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT_KHR);
+      if (device->instance->physicalDevice.has_syncobj) {
+         semaphore->permanent.type = ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ;
+         semaphore->permanent.syncobj = anv_gem_syncobj_create(device);
+         if (!semaphore->permanent.syncobj) {
+            vk_free2(&device->alloc, pAllocator, semaphore);
+            return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
+         }
+      } else {
+         semaphore->permanent.type = ANV_SEMAPHORE_TYPE_BO;
+         VkResult result = anv_bo_cache_alloc(device, &device->bo_cache,
+                                              4096, &semaphore->permanent.bo);
+         if (result != VK_SUCCESS) {
+            vk_free2(&device->alloc, pAllocator, semaphore);
+            return result;
+         }
 
-      semaphore->permanent.type = ANV_SEMAPHORE_TYPE_BO;
-      VkResult result = anv_bo_cache_alloc(device, &device->bo_cache,
-                                           4096, &semaphore->permanent.bo);
-      if (result != VK_SUCCESS) {
-         vk_free2(&device->alloc, pAllocator, semaphore);
-         return result;
+         /* If we're going to use this as a fence, we need to *not* have the
+          * EXEC_OBJECT_ASYNC bit set.
+          */
+         assert(!(semaphore->permanent.bo->flags & EXEC_OBJECT_ASYNC));
       }
-
-      /* If we're going to use this as a fence, we need to *not* have the
-       * EXEC_OBJECT_ASYNC bit set.
-       */
-      assert(!(semaphore->permanent.bo->flags & EXEC_OBJECT_ASYNC));
    } else if (handleTypes & VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT_KHR) {
       assert(handleTypes == VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT_KHR);
 
@@ -606,6 +614,10 @@ anv_semaphore_impl_cleanup(struct anv_device *device,
    case ANV_SEMAPHORE_TYPE_SYNC_FILE:
       close(impl->fd);
       return;
+
+   case ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ:
+      anv_gem_syncobj_destroy(device, impl->syncobj);
+      return;
    }
 
    unreachable("Invalid semaphore type");
@@ -691,21 +703,38 @@ VkResult anv_ImportSemaphoreFdKHR(
    };
 
    switch (pImportSemaphoreFdInfo->handleType) {
-   case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT_KHR: {
-      new_impl.type = ANV_SEMAPHORE_TYPE_BO;
-
-      VkResult result = anv_bo_cache_import(device, &device->bo_cache,
-                                            fd, 4096, &new_impl.bo);
-      if (result != VK_SUCCESS)
-         return result;
+   case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT_KHR:
+      if (device->instance->physicalDevice.has_syncobj) {
+         new_impl.type = ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ;
+
+         new_impl.syncobj = anv_gem_syncobj_fd_to_handle(device, fd);
+         if (!new_impl.syncobj)
+            return vk_error(VK_ERROR_INVALID_EXTERNAL_HANDLE_KHR);
+
+         /* From the Vulkan spec:
+          *
+          *    "Importing semaphore state from a file descriptor transfers
+          *    ownership of the file descriptor from the application to the
+          *    Vulkan implementation. The application must not perform any
+          *    operations on the file descriptor after a successful import."
+          *
+          * If the import fails, we leave the file descriptor open.
+          */
+         close(pImportSemaphoreFdInfo->fd);
+      } else {
+         new_impl.type = ANV_SEMAPHORE_TYPE_BO;
 
-      /* If we're going to use this as a fence, we need to *not* have the
-       * EXEC_OBJECT_ASYNC bit set.
-       */
-      assert(!(new_impl.bo->flags & EXEC_OBJECT_ASYNC));
+         VkResult result = anv_bo_cache_import(device, &device->bo_cache,
+                                               fd, 4096, &new_impl.bo);
+         if (result != VK_SUCCESS)
+            return result;
 
+         /* If we're going to use this as a fence, we need to *not* have the
+          * EXEC_OBJECT_ASYNC bit set.
+          */
+         assert(!(new_impl.bo->flags & EXEC_OBJECT_ASYNC));
+      }
       break;
-   }
 
    case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT_KHR:
       new_impl = (struct anv_semaphore_impl) {
@@ -740,6 +769,7 @@ VkResult anv_GetSemaphoreFdKHR(
    ANV_FROM_HANDLE(anv_device, device, _device);
    ANV_FROM_HANDLE(anv_semaphore, semaphore, pGetFdInfo->semaphore);
    VkResult result;
+   int fd;
 
    assert(pGetFdInfo->sType == VK_STRUCTURE_TYPE_SEMAPHORE_GET_FD_INFO_KHR);
 
@@ -782,6 +812,13 @@ VkResult anv_GetSemaphoreFdKHR(
       impl->fd = -1;
       return VK_SUCCESS;
 
+   case ANV_SEMAPHORE_TYPE_DRM_SYNCOBJ:
+      fd = anv_gem_syncobj_handle_to_fd(device, impl->syncobj);
+      if (fd < 0)
+         return vk_error(VK_ERROR_TOO_MANY_OBJECTS);
+      *pFd = fd;
+      break;
+
    default:
       return vk_error(VK_ERROR_INVALID_EXTERNAL_HANDLE_KHR);
    }