1 files changed, 182 insertions, 0 deletions
diff --git a/freedreno/freedreno_ringbuffer.c b/freedreno/freedreno_ringbuffer.c
new file mode 100644
index 0000000..8f0093a
--- /dev/null
+++ b/freedreno/freedreno_ringbuffer.c
@@ -0,0 +1,182 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
+ *
+ * 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 <robclark@freedesktop.org>
+ */
+
+#include <assert.h>
+
+#include "freedreno_drmif.h"
+#include "freedreno_priv.h"
+#include "freedreno_ringbuffer.h"
+
+drm_public struct fd_ringbuffer *
+fd_ringbuffer_new_flags(struct fd_pipe *pipe, uint32_t size,
+		enum fd_ringbuffer_flags flags)
+{
+	struct fd_ringbuffer *ring;
+
+	/* we can't really support "growable" rb's in general for
+	 * stateobj's since we need a single gpu addr (ie. can't
+	 * do the trick of a chain of IB packets):
+	 */
+	if (flags & FD_RINGBUFFER_OBJECT)
+		assert(size);
+
+	ring = pipe->funcs->ringbuffer_new(pipe, size, flags);
+	if (!ring)
+		return NULL;
+
+	ring->flags = flags;
+	ring->pipe = pipe;
+	ring->start = ring->funcs->hostptr(ring);
+	ring->end = &(ring->start[ring->size/4]);
+
+	ring->cur = ring->last_start = ring->start;
+
+	return ring;
+}
+
+drm_public struct fd_ringbuffer *
+fd_ringbuffer_new(struct fd_pipe *pipe, uint32_t size)
+{
+	return fd_ringbuffer_new_flags(pipe, size, 0);
+}
+
+drm_public struct fd_ringbuffer *
+fd_ringbuffer_new_object(struct fd_pipe *pipe, uint32_t size)
+{
+	return fd_ringbuffer_new_flags(pipe, size, FD_RINGBUFFER_OBJECT);
+}
+
+drm_public void fd_ringbuffer_del(struct fd_ringbuffer *ring)
+{
+	if (!atomic_dec_and_test(&ring->refcnt))
+		return;
+
+	fd_ringbuffer_reset(ring);
+	ring->funcs->destroy(ring);
+}
+
+drm_public struct fd_ringbuffer *
+fd_ringbuffer_ref(struct fd_ringbuffer *ring)
+{
+	STATIC_ASSERT(sizeof(ring->refcnt) <= sizeof(ring->__pad));
+	atomic_inc(&ring->refcnt);
+	return ring;
+}
+
+/* ringbuffers which are IB targets should set the toplevel rb (ie.
+ * the IB source) as it's parent before emitting reloc's, to ensure
+ * the bookkeeping works out properly.
+ */
+drm_public void fd_ringbuffer_set_parent(struct fd_ringbuffer *ring,
+					 struct fd_ringbuffer *parent)
+{
+	/* state objects should not be parented! */
+	assert(!(ring->flags & FD_RINGBUFFER_OBJECT));
+	ring->parent = parent;
+}
+
+drm_public void fd_ringbuffer_reset(struct fd_ringbuffer *ring)
+{
+	uint32_t *start = ring->start;
+	if (ring->pipe->id == FD_PIPE_2D)
+		start = &ring->start[0x140];
+	ring->cur = ring->last_start = start;
+	if (ring->funcs->reset)
+		ring->funcs->reset(ring);
+}
+
+drm_public int fd_ringbuffer_flush(struct fd_ringbuffer *ring)
+{
+	return ring->funcs->flush(ring, ring->last_start, -1, NULL);
+}
+
+drm_public int fd_ringbuffer_flush2(struct fd_ringbuffer *ring, int in_fence_fd,
+		int *out_fence_fd)
+{
+	return ring->funcs->flush(ring, ring->last_start, in_fence_fd, out_fence_fd);
+}
+
+drm_public void fd_ringbuffer_grow(struct fd_ringbuffer *ring, uint32_t ndwords)
+{
+	assert(ring->funcs->grow);     /* unsupported on kgsl */
+
+	/* there is an upper bound on IB size, which appears to be 0x100000 */
+	if (ring->size < 0x100000)
+		ring->size *= 2;
+
+	ring->funcs->grow(ring, ring->size);
+
+	ring->start = ring->funcs->hostptr(ring);
+	ring->end = &(ring->start[ring->size/4]);
+
+	ring->cur = ring->last_start = ring->start;
+}
+
+drm_public uint32_t fd_ringbuffer_timestamp(struct fd_ringbuffer *ring)
+{
+	return ring->last_timestamp;
+}
+
+drm_public void fd_ringbuffer_reloc(struct fd_ringbuffer *ring,
+				    const struct fd_reloc *reloc)
+{
+	assert(ring->pipe->gpu_id < 500);
+	ring->funcs->emit_reloc(ring, reloc);
+}
+
+drm_public void fd_ringbuffer_reloc2(struct fd_ringbuffer *ring,
+				     const struct fd_reloc *reloc)
+{
+	ring->funcs->emit_reloc(ring, reloc);
+}
+
+drm_public uint32_t fd_ringbuffer_cmd_count(struct fd_ringbuffer *ring)
+{
+	if (!ring->funcs->cmd_count)
+		return 1;
+	return ring->funcs->cmd_count(ring);
+}
+
+drm_public uint32_t
+fd_ringbuffer_emit_reloc_ring_full(struct fd_ringbuffer *ring,
+		struct fd_ringbuffer *target, uint32_t cmd_idx)
+{
+	return ring->funcs->emit_reloc_ring(ring, target, cmd_idx);
+}
+
+drm_public 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:
+	 */
+	assert(ring->flags & FD_RINGBUFFER_OBJECT);
+	return offset_bytes(ring->cur, ring->start);
+}
+