anv: add VK_EXT_display_control to anv driver [v5]

This extension provides fences and frame count information to direct
display contexts. It uses new kernel ioctls to provide 64-bits of
vblank sequence and nanosecond resolution.

v2:	Adopt Jason Ekstrand's coding conventions

	Declare variables at first use, eliminate extra whitespace between
	types and names. Wrap lines to 80 columns.

	Add extension to list in alphabetical order

	Suggested-by: Jason Ekstrand <[email protected]>

v3:	Adapt to WSI fence API change. It now returns VkResult and
	no longer has an option for relative timeouts.

v4:	wsi_register_display_event and wsi_register_device_event now
	use the default allocator when NULL is provided, so remove the
	computation of 'alloc' here.

v5:	use zalloc2 instead of alloc2 for the WSI fence.

	Suggested-by: Jason Ekstrand <[email protected]>

Signed-off-by: Keith Packard <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>

4 files changed, 108 insertions, 0 deletions

diff --git a/src/intel/vulkan/anv_extensions.py b/src/intel/vulkan/anv_extensions.py
index ecef1b254bf..0f99f58ecb1 100644
--- a/src/intel/vulkan/anv_extensions.py
+++ b/src/intel/vulkan/anv_extensions.py
@@ -113,6 +113,7 @@ EXTENSIONS = [
     Extension('VK_EXT_acquire_xlib_display',              1, 'VK_USE_PLATFORM_XLIB_XRANDR_EXT'),
     Extension('VK_EXT_debug_report',                      8, True),
     Extension('VK_EXT_direct_mode_display',               1, 'VK_USE_PLATFORM_DISPLAY_KHR'),
+    Extension('VK_EXT_display_control',                   1, 'VK_USE_PLATFORM_DISPLAY_KHR'),
     Extension('VK_EXT_display_surface_counter',           1, 'VK_USE_PLATFORM_DISPLAY_KHR'),
     Extension('VK_EXT_external_memory_dma_buf',           1, True),
     Extension('VK_EXT_global_priority',                   1,
diff --git a/src/intel/vulkan/anv_private.h b/src/intel/vulkan/anv_private.h
index edc5317bac4..510471da602 100644
--- a/src/intel/vulkan/anv_private.h
+++ b/src/intel/vulkan/anv_private.h
@@ -2134,6 +2134,7 @@ enum anv_fence_type {
    ANV_FENCE_TYPE_NONE = 0,
    ANV_FENCE_TYPE_BO,
    ANV_FENCE_TYPE_SYNCOBJ,
+   ANV_FENCE_TYPE_WSI,
 };
 
 enum anv_bo_fence_state {
@@ -2168,6 +2169,9 @@ struct anv_fence_impl {
 
       /** DRM syncobj handle for syncobj-based fences */
       uint32_t syncobj;
+
+      /** WSI fence */
+      struct wsi_fence *fence_wsi;
    };
 };
 
diff --git a/src/intel/vulkan/anv_queue.c b/src/intel/vulkan/anv_queue.c
index 6e275629e14..e0c0a42069f 100644
--- a/src/intel/vulkan/anv_queue.c
+++ b/src/intel/vulkan/anv_queue.c
@@ -324,6 +324,10 @@ anv_fence_impl_cleanup(struct anv_device *device,
       anv_gem_syncobj_destroy(device, impl->syncobj);
       break;
 
+   case ANV_FENCE_TYPE_WSI:
+      impl->fence_wsi->destroy(impl->fence_wsi);
+      break;
+
    default:
       unreachable("Invalid fence type");
    }
@@ -674,6 +678,17 @@ done:
 }
 
 static VkResult
+anv_wait_for_wsi_fence(struct anv_device *device,
+                       const VkFence _fence,
+                       uint64_t abs_timeout)
+{
+   ANV_FROM_HANDLE(anv_fence, fence, _fence);
+   struct anv_fence_impl *impl = &fence->permanent;
+
+   return impl->fence_wsi->wait(impl->fence_wsi, abs_timeout);
+}
+
+static VkResult
 anv_wait_for_fences(struct anv_device *device,
                     uint32_t fenceCount,
                     const VkFence *pFences,
@@ -695,6 +710,9 @@ anv_wait_for_fences(struct anv_device *device,
             result = anv_wait_for_syncobj_fences(device, 1, &pFences[i],
                                                  true, abs_timeout);
             break;
+         case ANV_FENCE_TYPE_WSI:
+            result = anv_wait_for_wsi_fence(device, pFences[i], abs_timeout);
+            break;
          case ANV_FENCE_TYPE_NONE:
             result = VK_SUCCESS;
             break;
diff --git a/src/intel/vulkan/anv_wsi_display.c b/src/intel/vulkan/anv_wsi_display.c
index ed679e85e13..94e16010463 100644
--- a/src/intel/vulkan/anv_wsi_display.c
+++ b/src/intel/vulkan/anv_wsi_display.c
@@ -174,3 +174,88 @@ anv_GetRandROutputDisplayEXT(VkPhysicalDevice  physical_device,
                                        display);
 }
 #endif /* VK_USE_PLATFORM_XLIB_XRANDR_EXT */
+
+/* VK_EXT_display_control */
+
+VkResult
+anv_DisplayPowerControlEXT(VkDevice                    _device,
+                            VkDisplayKHR                display,
+                            const VkDisplayPowerInfoEXT *display_power_info)
+{
+   ANV_FROM_HANDLE(anv_device, device, _device);
+
+   return wsi_display_power_control(
+      _device, &device->instance->physicalDevice.wsi_device,
+      display, display_power_info);
+}
+
+VkResult
+anv_RegisterDeviceEventEXT(VkDevice _device,
+                            const VkDeviceEventInfoEXT *device_event_info,
+                            const VkAllocationCallbacks *allocator,
+                            VkFence *_fence)
+{
+   ANV_FROM_HANDLE(anv_device, device, _device);
+   struct anv_fence *fence;
+   VkResult ret;
+
+   fence = vk_zalloc2(&device->instance->alloc, allocator, sizeof (*fence), 8,
+                      VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
+   if (!fence)
+      return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
+
+   fence->permanent.type = ANV_FENCE_TYPE_WSI;
+
+   ret = wsi_register_device_event(_device,
+                                   &device->instance->physicalDevice.wsi_device,
+                                   device_event_info,
+                                   allocator,
+                                   &fence->permanent.fence_wsi);
+   if (ret == VK_SUCCESS)
+      *_fence = anv_fence_to_handle(fence);
+   else
+      vk_free2(&device->instance->alloc, allocator, fence);
+   return ret;
+}
+
+VkResult
+anv_RegisterDisplayEventEXT(VkDevice _device,
+                             VkDisplayKHR display,
+                             const VkDisplayEventInfoEXT *display_event_info,
+                             const VkAllocationCallbacks *allocator,
+                             VkFence *_fence)
+{
+   ANV_FROM_HANDLE(anv_device, device, _device);
+   struct anv_fence *fence;
+   VkResult ret;
+
+   fence = vk_zalloc2(&device->alloc, allocator, sizeof (*fence), 8,
+                      VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
+   if (!fence)
+      return VK_ERROR_OUT_OF_HOST_MEMORY;
+
+   fence->permanent.type = ANV_FENCE_TYPE_WSI;
+
+   ret = wsi_register_display_event(
+      _device, &device->instance->physicalDevice.wsi_device,
+      display, display_event_info, allocator, &(fence->permanent.fence_wsi));
+
+   if (ret == VK_SUCCESS)
+      *_fence = anv_fence_to_handle(fence);
+   else
+      vk_free2(&device->alloc, allocator, fence);
+   return ret;
+}
+
+VkResult
+anv_GetSwapchainCounterEXT(VkDevice _device,
+                            VkSwapchainKHR swapchain,
+                            VkSurfaceCounterFlagBitsEXT flag_bits,
+                            uint64_t *value)
+{
+   ANV_FROM_HANDLE(anv_device, device, _device);
+
+   return wsi_get_swapchain_counter(
+      _device, &device->instance->physicalDevice.wsi_device,
+      swapchain, flag_bits, value);
+}