1 files changed, 159 insertions, 0 deletions
diff --git a/src/freedreno/drm/freedreno_ringbuffer.h b/src/freedreno/drm/freedreno_ringbuffer.h
new file mode 100644
index 00000000000..4292c8f65d6
--- /dev/null
+++ b/src/freedreno/drm/freedreno_ringbuffer.h
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2012-2018 Rob Clark <[email protected]>
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#ifndef FREEDRENO_RINGBUFFER_H_
+#define FREEDRENO_RINGBUFFER_H_
+
+#include "util/u_debug.h"
+
+#include "freedreno_drmif.h"
+
+struct fd_submit;
+struct fd_ringbuffer;
+
+enum fd_ringbuffer_flags {
+
+	/* Primary ringbuffer for a submit, ie. an IB1 level rb
+	 * which kernel must setup RB->IB1 CP_INDIRECT_BRANCH
+	 * packets.
+	 */
+	FD_RINGBUFFER_PRIMARY = 0x1,
+
+	/* Hint that the stateobj will be used for streaming state
+	 * that is used once or a few times and then discarded.
+	 *
+	 * For sub-allocation, non streaming stateobj's should be
+	 * sub-allocated from a page size buffer, so one long lived
+	 * state obj doesn't prevent other pages from being freed.
+	 * (Ie. it would be no worse than allocating a page sized
+	 * bo for each small non-streaming stateobj).
+	 *
+	 * But streaming stateobj's could be sub-allocated from a
+	 * larger buffer to reduce the alloc/del overhead.
+	 */
+	FD_RINGBUFFER_STREAMING = 0x2,
+
+	/* Indicates that "growable" cmdstream can be used,
+	 * consisting of multiple physical cmdstream buffers
+	 */
+	FD_RINGBUFFER_GROWABLE = 0x4,
+
+	/* Internal use only: */
+	_FD_RINGBUFFER_OBJECT = 0x8,
+};
+
+/* A submit object manages/tracks all the state buildup for a "submit"
+ * ioctl to the kernel.  Additionally, with the exception of long-lived
+ * non-STREAMING stateobj rb's, rb's are allocated from the submit.
+ */
+struct fd_submit * fd_submit_new(struct fd_pipe *pipe);
+
+/* NOTE: all ringbuffer's create from the submit should be unref'd
+ * before destroying the submit.
+ */
+void fd_submit_del(struct fd_submit *submit);
+
+/* Allocate a new rb from the submit. */
+struct fd_ringbuffer * fd_submit_new_ringbuffer(struct fd_submit *submit,
+		uint32_t size, enum fd_ringbuffer_flags flags);
+
+/* in_fence_fd: -1 for no in-fence, else fence fd
+ * out_fence_fd: NULL for no output-fence requested, else ptr to return out-fence
+ */
+int fd_submit_flush(struct fd_submit *submit,
+		int in_fence_fd, int *out_fence_fd,
+		uint32_t *out_fence);
+
+struct fd_ringbuffer_funcs;
+
+/* the ringbuffer object is not opaque so that OUT_RING() type stuff
+ * can be inlined.  Note that users should not make assumptions about
+ * the size of this struct.
+ */
+struct fd_ringbuffer {
+	uint32_t *cur, *end, *start;
+	const struct fd_ringbuffer_funcs *funcs;
+
+// size or end coudl probably go away
+	int size;
+	int32_t refcnt;
+	enum fd_ringbuffer_flags flags;
+};
+
+/* Allocate a new long-lived state object, not associated with
+ * a submit:
+ */
+struct fd_ringbuffer * fd_ringbuffer_new_object(struct fd_pipe *pipe,
+		uint32_t size);
+
+struct fd_ringbuffer *fd_ringbuffer_ref(struct fd_ringbuffer *ring);
+void fd_ringbuffer_del(struct fd_ringbuffer *ring);
+
+void fd_ringbuffer_grow(struct fd_ringbuffer *ring, uint32_t ndwords);
+
+static inline void fd_ringbuffer_emit(struct fd_ringbuffer *ring,
+		uint32_t data)
+{
+	(*ring->cur++) = data;
+}
+
+struct fd_reloc {
+	struct fd_bo *bo;
+#define FD_RELOC_READ             0x0001
+#define FD_RELOC_WRITE            0x0002
+	uint32_t flags;
+	uint32_t offset;
+	uint32_t or;
+	int32_t  shift;
+	uint32_t orhi;      /* used for a5xx+ */
+};
+
+/* NOTE: relocs are 2 dwords on a5xx+ */
+
+void fd_ringbuffer_reloc(struct fd_ringbuffer *ring, const struct fd_reloc *reloc);
+uint32_t fd_ringbuffer_cmd_count(struct fd_ringbuffer *ring);
+uint32_t fd_ringbuffer_emit_reloc_ring_full(struct fd_ringbuffer *ring,
+		struct fd_ringbuffer *target, uint32_t cmd_idx);
+
+static inline uint32_t
+offset_bytes(void *end, void *start)
+{
+	return ((char *)end) - ((char *)start);
+}
+
+static inline uint32_t
+fd_ringbuffer_size(struct fd_ringbuffer *ring)
+{
+	/* only really needed for stateobj ringbuffers, and won't really
+	 * do what you expect for growable rb's.. so lets just restrict
+	 * this to stateobj's for now:
+	 */
+	debug_assert(!(ring->flags & FD_RINGBUFFER_GROWABLE));
+	return offset_bytes(ring->cur, ring->start);
+}
+
+
+#endif /* FREEDRENO_RINGBUFFER_H_ */