drm/etnaviv: move cmdbuf de-/allocation into own file

This will get more complex with the following changes, so move it
into its own place.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>

drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2017 Etnaviv Project
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ETNAVIV_CMDBUF_H__
+#define __ETNAVIV_CMDBUF_H__
+
+#include <drm/drm_mm.h>
+#include <linux/types.h>
+
+struct etnaviv_cmdbuf {
+	/* device this cmdbuf is allocated for */
+	struct etnaviv_gpu *gpu;
+	/* user context key, must be unique between all active users */
+	struct etnaviv_file_private *ctx;
+	/* cmdbuf properties */
+	void *vaddr;
+	dma_addr_t paddr;
+	u32 size;
+	u32 user_size;
+	/* vram node used if the cmdbuf is mapped through the MMUv2 */
+	struct drm_mm_node vram_node;
+	/* fence after which this buffer is to be disposed */
+	struct dma_fence *fence;
+	/* target exec state */
+	u32 exec_state;
+	/* per GPU in-flight list */
+	struct list_head node;
+	/* BOs attached to this command buffer */
+	unsigned int nr_bos;
+	struct etnaviv_vram_mapping *bo_map[0];
+};
+
+#endif /* __ETNAVIV_CMDBUF_H__ */