1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_va.c b/drivers/gpu/drm/vmwgfx/vmwgfx_va.c
new file mode 100644
index 000000000..ebc1d83c3
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_va.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/**************************************************************************
+ *
+ * Copyright 2012-2016 VMware, Inc., Palo Alto, CA., USA
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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 "vmwgfx_drv.h"
+#include "vmwgfx_resource_priv.h"
+
+/**
+ * struct vmw_stream - Overlay stream simple resource.
+ * @sres: The simple resource we derive from.
+ * @stream_id: The overlay stream id.
+ */
+struct vmw_stream {
+	struct vmw_simple_resource sres;
+	u32 stream_id;
+};
+
+/**
+ * vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream.
+ * @res: Pointer to the struct vmw_resource.
+ *
+ * Returns: Returns a pointer to the struct vmw_stream.
+ */
+static struct vmw_stream *
+vmw_stream(struct vmw_resource *res)
+{
+	return container_of(res, struct vmw_stream, sres.res);
+}
+
+/***************************************************************************
+ * Simple resource callbacks for struct vmw_stream
+ **************************************************************************/
+static void vmw_stream_hw_destroy(struct vmw_resource *res)
+{
+	struct vmw_private *dev_priv = res->dev_priv;
+	struct vmw_stream *stream = vmw_stream(res);
+	int ret;
+
+	ret = vmw_overlay_unref(dev_priv, stream->stream_id);
+	WARN_ON_ONCE(ret != 0);
+}
+
+static int vmw_stream_init(struct vmw_resource *res, void *data)
+{
+	struct vmw_stream *stream = vmw_stream(res);
+
+	return vmw_overlay_claim(res->dev_priv, &stream->stream_id);
+}
+
+static void vmw_stream_set_arg_handle(void *data, u32 handle)
+{
+	struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
+
+	arg->stream_id = handle;
+}
+
+static const struct vmw_simple_resource_func va_stream_func = {
+	.res_func = {
+		.res_type = vmw_res_stream,
+		.needs_backup = false,
+		.may_evict = false,
+		.type_name = "overlay stream",
+		.backup_placement = NULL,
+		.create = NULL,
+		.destroy = NULL,
+		.bind = NULL,
+		.unbind = NULL
+	},
+	.ttm_res_type = VMW_RES_STREAM,
+	.size = sizeof(struct vmw_stream),
+	.init = vmw_stream_init,
+	.hw_destroy = vmw_stream_hw_destroy,
+	.set_arg_handle = vmw_stream_set_arg_handle,
+};
+
+/***************************************************************************
+ * End simple resource callbacks for struct vmw_stream
+ **************************************************************************/
+
+/**
+ * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to
+ * a struct vmw_stream.
+ * @dev: Pointer to the drm device.
+ * @data: The ioctl argument
+ * @file_priv: Pointer to a struct drm_file identifying the caller.
+ *
+ * Return:
+ *   0 if successful.
+ *   Negative error value on failure.
+ */
+int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
+
+	return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
+					 arg->stream_id, TTM_REF_USAGE);
+}
+
+/**
+ * vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay.
+ * @dev: Pointer to the drm device.
+ * @data: The ioctl argument
+ * @file_priv: Pointer to a struct drm_file identifying the caller.
+ *
+ * Return:
+ *   0 if successful.
+ *   Negative error value on failure.
+ */
+int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
+			   struct drm_file *file_priv)
+{
+	return vmw_simple_resource_create_ioctl(dev, data, file_priv,
+						&va_stream_func);
+}
+
+/**
+ * vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle.
+ * @dev_priv: Pointer to a struct vmw_private.
+ * @tfile: struct ttm_object_file identifying the caller.
+ * @inout_id: In: The user-space handle. Out: The stream id.
+ * @out: On output contains a refcounted pointer to the embedded
+ * struct vmw_resource.
+ *
+ * Return:
+ *   0 if successful.
+ *   Negative error value on failure.
+ */
+int vmw_user_stream_lookup(struct vmw_private *dev_priv,
+			   struct ttm_object_file *tfile,
+			   uint32_t *inout_id, struct vmw_resource **out)
+{
+	struct vmw_stream *stream;
+	struct vmw_resource *res =
+		vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func);
+
+	if (IS_ERR(res))
+		return PTR_ERR(res);
+
+	stream = vmw_stream(res);
+	*inout_id = stream->stream_id;
+	*out = res;
+
+	return 0;
+}