/* -*- 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);

}