radv: add external memory support.

This adds support for exporting 2D images, to an
opaque fd.

This implements the:
VK_KHX_external_memory_capabilities
VK_KHX_external_memory
VK_KHX_external_memory_fd

extensions.

These are used by SteamVR, we should work with anv
to decide if we should ship these under an env
var or something.

v2 (Bas): - Don't expose the semaphore ext without implementing it.
          - Only export the capabilities ext as instance ext.
          - Implement radv_GetPhysicalDeviceExternalBufferPropertiesKHX.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Bas Nieuwenhuizen <basni@google.com>

3 files changed, 183 insertions, 14 deletions

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 9a44f657a3c..e661d220738 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -97,6 +97,10 @@ static const VkExtensionProperties instance_extensions[] = {
 		.extensionName = VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME,
 		.specVersion = 1,
 	},
+	{
+		.extensionName = VK_KHX_EXTERNAL_MEMORY_CAPABILITIES_EXTENSION_NAME,
+		.specVersion = 1,
+	},
 };
 
 static const VkExtensionProperties common_device_extensions[] = {
@@ -136,6 +140,14 @@ static const VkExtensionProperties common_device_extensions[] = {
 		.extensionName = VK_NV_DEDICATED_ALLOCATION_EXTENSION_NAME,
 		.specVersion = 1,
 	},
+	{
+		.extensionName = VK_KHX_EXTERNAL_MEMORY_EXTENSION_NAME,
+		.specVersion = 1,
+	},
+	{
+		.extensionName = VK_KHX_EXTERNAL_MEMORY_FD_EXTENSION_NAME,
+		.specVersion = 1,
+	},
 };
 
 static VkResult
@@ -279,7 +291,6 @@ radv_physical_device_finish(struct radv_physical_device *device)
 	close(device->local_fd);
 }
 
-
 static void *
 default_alloc_func(void *pUserData, size_t size, size_t align,
                    VkSystemAllocationScope allocationScope)
@@ -2035,7 +2046,7 @@ VkResult radv_AllocateMemory(
 	VkResult result;
 	enum radeon_bo_domain domain;
 	uint32_t flags = 0;
-	const VkDedicatedAllocationMemoryAllocateInfoNV *dedicate_info = NULL;
+
 	assert(pAllocateInfo->sType == VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO);
 
 	if (pAllocateInfo->allocationSize == 0) {
@@ -2044,15 +2055,10 @@ VkResult radv_AllocateMemory(
 		return VK_SUCCESS;
 	}
 
-	vk_foreach_struct(ext, pAllocateInfo->pNext) {
-		switch (ext->sType) {
-		case VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_MEMORY_ALLOCATE_INFO_NV:
-			dedicate_info = (const VkDedicatedAllocationMemoryAllocateInfoNV *)ext;
-			break;
-		default:
-			break;
-		}
-	}
+	const VkImportMemoryFdInfoKHX *import_info =
+		vk_find_struct_const(pAllocateInfo->pNext, IMPORT_MEMORY_FD_INFO_KHX);
+	const VkDedicatedAllocationMemoryAllocateInfoNV *dedicate_info =
+		vk_find_struct_const(pAllocateInfo->pNext, DEDICATED_ALLOCATION_MEMORY_ALLOCATE_INFO_NV);
 
 	mem = vk_alloc2(&device->alloc, pAllocator, sizeof(*mem), 8,
 			  VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
@@ -2067,6 +2073,17 @@ VkResult radv_AllocateMemory(
 		mem->buffer = NULL;
 	}
 
+	if (import_info) {
+		assert(import_info->handleType ==
+		       VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT_KHX);
+		mem->bo = device->ws->buffer_from_fd(device->ws, import_info->fd,
+						     NULL, NULL);
+		if (!mem->bo)
+			goto fail;
+		else
+			goto out_success;
+	}
+
 	uint64_t alloc_size = align_u64(pAllocateInfo->allocationSize, 4096);
 	if (pAllocateInfo->memoryTypeIndex == RADV_MEM_TYPE_GTT_WRITE_COMBINE ||
 	    pAllocateInfo->memoryTypeIndex == RADV_MEM_TYPE_GTT_CACHED)
@@ -2090,7 +2107,7 @@ VkResult radv_AllocateMemory(
 		goto fail;
 	}
 	mem->type_index = pAllocateInfo->memoryTypeIndex;
-
+out_success:
 	*pMem = radv_device_memory_to_handle(mem);
 
 	return VK_SUCCESS;
@@ -3120,7 +3137,6 @@ void radv_DestroySampler(
 	vk_free2(&device->alloc, pAllocator, sampler);
 }
 
-
 /* vk_icd.h does not declare this function, so we declare it here to
  * suppress Wmissing-prototypes.
  */
@@ -3164,3 +3180,34 @@ vk_icdNegotiateLoaderICDInterfaceVersion(uint32_t *pSupportedVersion)
 	*pSupportedVersion = MIN2(*pSupportedVersion, 3u);
 	return VK_SUCCESS;
 }
+
+VkResult radv_GetMemoryFdKHX(VkDevice _device,
+			     VkDeviceMemory _memory,
+			     VkExternalMemoryHandleTypeFlagsKHX handleType,
+			     int *pFD)
+{
+	RADV_FROM_HANDLE(radv_device, device, _device);
+	RADV_FROM_HANDLE(radv_device_memory, memory, _memory);
+
+	/* We support only one handle type. */
+	assert(handleType == VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT_KHX);
+
+	bool ret = radv_get_memory_fd(device, memory, pFD);
+	if (ret == false)
+		return VK_ERROR_OUT_OF_DEVICE_MEMORY;
+	return VK_SUCCESS;
+}
+
+VkResult radv_GetMemoryFdPropertiesKHX(VkDevice _device,
+				       VkExternalMemoryHandleTypeFlagBitsKHX handleType,
+				       int fd,
+				       VkMemoryFdPropertiesKHX *pMemoryFdProperties)
+{
+   /* The valid usage section for this function says:
+    *
+    *    "handleType must not be one of the handle types defined as opaque."
+    *
+    * Since we only handle opaque handles for now, there are no FD properties.
+    */
+   return VK_ERROR_INVALID_EXTERNAL_HANDLE_KHX;
+}
diff --git a/src/amd/vulkan/radv_entrypoints_gen.py b/src/amd/vulkan/radv_entrypoints_gen.py
index 3474c789ea8..fbf8daf0d27 100644
--- a/src/amd/vulkan/radv_entrypoints_gen.py
+++ b/src/amd/vulkan/radv_entrypoints_gen.py
@@ -42,6 +42,9 @@ supported_extensions = [
    'VK_KHR_wayland_surface',
    'VK_KHR_xcb_surface',
    'VK_KHR_xlib_surface',
+   'VK_KHX_external_memory_capabilities',
+   'VK_KHX_external_memory',
+   'VK_KHX_external_memory_fd',
 ]
 
 # We generate a static hash table for entry point lookup
diff --git a/src/amd/vulkan/radv_formats.c b/src/amd/vulkan/radv_formats.c
index 8da18189df0..6cff0a5384e 100644
--- a/src/amd/vulkan/radv_formats.c
+++ b/src/amd/vulkan/radv_formats.c
@@ -28,6 +28,7 @@
 #include "sid.h"
 #include "r600d_common.h"
 
+#include "util/vk_util.h"
 #include "util/u_half.h"
 #include "util/format_srgb.h"
 #include "util/format_r11g11b10f.h"
@@ -1140,14 +1141,107 @@ VkResult radv_GetPhysicalDeviceImageFormatProperties(
 						pImageFormatProperties);
 }
 
+static void
+get_external_image_format_properties(const VkPhysicalDeviceImageFormatInfo2KHR *pImageFormatInfo,
+				     VkExternalMemoryPropertiesKHX *external_properties)
+{
+	VkExternalMemoryFeatureFlagBitsKHX flags = 0;
+	VkExternalMemoryHandleTypeFlagsKHX export_flags = 0;
+	VkExternalMemoryHandleTypeFlagsKHX compat_flags = 0;
+	switch (pImageFormatInfo->type) {
+	case VK_IMAGE_TYPE_2D:
+		flags = VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT_KHX|VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT_KHX|VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT_KHX;
+		compat_flags = export_flags = VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT_KHX;
+		break;
+	default:
+		break;
+	}
+
+	*external_properties = (VkExternalMemoryPropertiesKHX) {
+		.externalMemoryFeatures = flags,
+		.exportFromImportedHandleTypes = export_flags,
+		.compatibleHandleTypes = compat_flags,
+	};
+}
+
 VkResult radv_GetPhysicalDeviceImageFormatProperties2KHR(
 	VkPhysicalDevice                            physicalDevice,
 	const VkPhysicalDeviceImageFormatInfo2KHR  *base_info,
 	VkImageFormatProperties2KHR                *base_props)
 {
 	RADV_FROM_HANDLE(radv_physical_device, physical_device, physicalDevice);
-	return radv_get_image_format_properties(physical_device, base_info,
+	const VkPhysicalDeviceExternalImageFormatInfoKHX *external_info = NULL;
+	VkExternalImageFormatPropertiesKHX *external_props = NULL;
+	VkResult result;
+
+	result = radv_get_image_format_properties(physical_device, base_info,
 						&base_props->imageFormatProperties);
+	if (result != VK_SUCCESS)
+		return result;
+
+	   /* Extract input structs */
+	vk_foreach_struct_const(s, base_info->pNext) {
+		switch (s->sType) {
+		case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_IMAGE_FORMAT_INFO_KHX:
+			external_info = (const void *) s;
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* Extract output structs */
+	vk_foreach_struct(s, base_props->pNext) {
+		switch (s->sType) {
+		case VK_STRUCTURE_TYPE_EXTERNAL_IMAGE_FORMAT_PROPERTIES_KHX:
+			external_props = (void *) s;
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* From the Vulkan 1.0.42 spec:
+	 *
+	 *    If handleType is 0, vkGetPhysicalDeviceImageFormatProperties2KHR will
+	 *    behave as if VkPhysicalDeviceExternalImageFormatInfoKHX was not
+	 *    present and VkExternalImageFormatPropertiesKHX will be ignored.
+	 */
+	if (external_info && external_info->handleType != 0) {
+		switch (external_info->handleType) {
+		case VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT_KHX:
+			get_external_image_format_properties(base_info, &external_props->externalMemoryProperties);
+			break;
+		default:
+			/* From the Vulkan 1.0.42 spec:
+			 *
+			 *    If handleType is not compatible with the [parameters] specified
+			 *    in VkPhysicalDeviceImageFormatInfo2KHR, then
+			 *    vkGetPhysicalDeviceImageFormatProperties2KHR returns
+			 *    VK_ERROR_FORMAT_NOT_SUPPORTED.
+			 */
+			result = vk_errorf(VK_ERROR_FORMAT_NOT_SUPPORTED,
+					   "unsupported VkExternalMemoryTypeFlagBitsKHX 0x%x",
+					   external_info->handleType);
+			goto fail;
+		}
+	}
+
+	return VK_SUCCESS;
+
+fail:
+	if (result == VK_ERROR_FORMAT_NOT_SUPPORTED) {
+		/* From the Vulkan 1.0.42 spec:
+		 *
+		 *    If the combination of parameters to
+		 *    vkGetPhysicalDeviceImageFormatProperties2KHR is not supported by
+		 *    the implementation for use in vkCreateImage, then all members of
+		 *    imageFormatProperties will be filled with zero.
+		 */
+		base_props->imageFormatProperties = (VkImageFormatProperties) {0};
+	}
+
+	return result;
 }
 
 void radv_GetPhysicalDeviceSparseImageFormatProperties(
@@ -1173,3 +1267,28 @@ void radv_GetPhysicalDeviceSparseImageFormatProperties2KHR(
 	/* Sparse images are not yet supported. */
 	*pPropertyCount = 0;
 }
+
+void radv_GetPhysicalDeviceExternalBufferPropertiesKHX(
+	VkPhysicalDevice                            physicalDevice,
+	const VkPhysicalDeviceExternalBufferInfoKHX *pExternalBufferInfo,
+	VkExternalBufferPropertiesKHX               *pExternalBufferProperties)
+{
+	VkExternalMemoryFeatureFlagBitsKHX flags = 0;
+	VkExternalMemoryHandleTypeFlagsKHX export_flags = 0;
+	VkExternalMemoryHandleTypeFlagsKHX compat_flags = 0;
+	switch(pExternalBufferInfo->handleType) {
+	case VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT_KHX:
+		flags = VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT_KHX |
+		        VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT_KHX |
+		        VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT_KHX;
+		compat_flags = export_flags = VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT_KHX;
+		break;
+	default:
+		break;
+	}
+	pExternalBufferProperties->externalMemoryProperties = (VkExternalMemoryPropertiesKHX) {
+		.externalMemoryFeatures = flags,
+		.exportFromImportedHandleTypes = export_flags,
+		.compatibleHandleTypes = compat_flags,
+	};
+}