/*
 * 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>
 */

#ifndef FREEDRENO_DRAW_H_
#define FREEDRENO_DRAW_H_

#include "pipe/p_state.h"
#include "pipe/p_context.h"

#include "freedreno_context.h"
#include "freedreno_resource.h"
#include "freedreno_screen.h"
#include "freedreno_util.h"

struct fd_ringbuffer;

void fd_draw_init(struct pipe_context *pctx);

static inline void
fd_draw(struct fd_batch *batch, struct fd_ringbuffer *ring,
		enum pc_di_primtype primtype,
		enum pc_di_vis_cull_mode vismode,
		enum pc_di_src_sel src_sel, uint32_t count,
		uint8_t instances,
		enum pc_di_index_size idx_type,
		uint32_t idx_size, uint32_t idx_offset,
		struct pipe_resource *idx_buffer)
{
	/* for debug after a lock up, write a unique counter value
	 * to scratch7 for each draw, to make it easier to match up
	 * register dumps to cmdstream.  The combination of IB
	 * (scratch6) and DRAW is enough to "triangulate" the
	 * particular draw that caused lockup.
	 */
	emit_marker(ring, 7);

	if (is_a3xx_p0(batch->ctx->screen)) {
		/* dummy-draw workaround: */
		OUT_PKT3(ring, CP_DRAW_INDX, 3);
		OUT_RING(ring, 0x00000000);
		OUT_RING(ring, DRAW(1, DI_SRC_SEL_AUTO_INDEX,
							INDEX_SIZE_IGN, USE_VISIBILITY, 0));
		OUT_RING(ring, 0);             /* NumIndices */

		/* ugg, hard-code register offset to avoid pulling in the
		 * a3xx register headers into something #included from a2xx
		 */
		OUT_PKT0(ring, 0x2206, 1);     /* A3XX_HLSQ_CONST_VSPRESV_RANGE_REG */
		OUT_RING(ring, 0);
	}

	if (is_a20x(batch->ctx->screen)) {
		/* a20x has a different draw command for drawing with binning data
		 * note: if we do patching we will have to insert a NOP
		 *
		 * binning data is is 1 byte/vertex (8x8x4 bin position of vertex)
		 * base ptr set by the CP_SET_DRAW_INIT_FLAGS command
		 *
		 * TODO: investigate the faceness_cull_select parameter to see how
		 * it is used with hw binning to use "faceness" bits
		 */
		uint32_t size = 2;
		if (vismode)
			size += 2;
		if (idx_buffer)
			size += 2;

		OUT_PKT3(ring, vismode ? CP_DRAW_INDX_BIN : CP_DRAW_INDX, size);
		OUT_RING(ring, 0x00000000);
		OUT_RING(ring, DRAW_A20X(primtype, DI_FACE_CULL_NONE, src_sel,
								 idx_type, vismode, vismode, count));
		if (vismode == USE_VISIBILITY) {
			OUT_RING(ring, batch->num_vertices);
			OUT_RING(ring, count);
		}
	} else {
		OUT_PKT3(ring, CP_DRAW_INDX, idx_buffer ? 5 : 3);
		OUT_RING(ring, 0x00000000);        /* viz query info. */
		if (vismode == USE_VISIBILITY) {
			/* leave vis mode blank for now, it will be patched up when
			 * we know if we are binning or not
			 */
			OUT_RINGP(ring, DRAW(primtype, src_sel, idx_type, 0, instances),
					&batch->draw_patches);
		} else {
			OUT_RING(ring, DRAW(primtype, src_sel, idx_type, vismode, instances));
		}
		OUT_RING(ring, count);             /* NumIndices */
	}

	if (idx_buffer) {
		OUT_RELOC(ring, fd_resource(idx_buffer)->bo, idx_offset, 0, 0);
		OUT_RING (ring, idx_size);
	}

	emit_marker(ring, 7);

	fd_reset_wfi(batch);
}


static inline enum pc_di_index_size
size2indextype(unsigned index_size)
{
	switch (index_size) {
	case 1: return INDEX_SIZE_8_BIT;
	case 2: return INDEX_SIZE_16_BIT;
	case 4: return INDEX_SIZE_32_BIT;
	}
	DBG("unsupported index size: %d", index_size);
	assert(0);
	return INDEX_SIZE_IGN;
}

/* this is same for a2xx/a3xx, so split into helper: */
static inline void
fd_draw_emit(struct fd_batch *batch, struct fd_ringbuffer *ring,
		enum pc_di_primtype primtype,
		enum pc_di_vis_cull_mode vismode,
		const struct pipe_draw_info *info,
		unsigned index_offset)
{
	struct pipe_resource *idx_buffer = NULL;
	enum pc_di_index_size idx_type = INDEX_SIZE_IGN;
	enum pc_di_src_sel src_sel;
	uint32_t idx_size, idx_offset;

	if (info->index_size) {
		assert(!info->has_user_indices);

		idx_buffer = info->index.resource;
		idx_type = size2indextype(info->index_size);
		idx_size = info->index_size * info->count;
		idx_offset = index_offset + info->start * info->index_size;
		src_sel = DI_SRC_SEL_DMA;
	} else {
		idx_buffer = NULL;
		idx_type = INDEX_SIZE_IGN;
		idx_size = 0;
		idx_offset = 0;
		src_sel = DI_SRC_SEL_AUTO_INDEX;
	}

	fd_draw(batch, ring, primtype, vismode, src_sel,
			info->count, info->instance_count - 1,
			idx_type, idx_size, idx_offset, idx_buffer);
}

#endif /* FREEDRENO_DRAW_H_ */