/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

/*
 * Copyright (C) 2014 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 "pipe/p_state.h"
#include "util/u_string.h"
#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "util/u_format.h"

#include "freedreno_draw.h"
#include "freedreno_state.h"
#include "freedreno_resource.h"

#include "fd4_gmem.h"
#include "fd4_context.h"
#include "fd4_draw.h"
#include "fd4_emit.h"
#include "fd4_program.h"
#include "fd4_format.h"
#include "fd4_zsa.h"

static void
emit_mrt(struct fd_ringbuffer *ring, unsigned nr_bufs,
		struct pipe_surface **bufs, uint32_t *bases,
		uint32_t bin_w, bool decode_srgb)
{
	enum a4xx_tile_mode tile_mode;
	unsigned i;

	if (bin_w) {
		tile_mode = 2;
	} else {
		tile_mode = TILE4_LINEAR;
	}

	for (i = 0; i < A4XX_MAX_RENDER_TARGETS; i++) {
		enum a4xx_color_fmt format = 0;
		enum a3xx_color_swap swap = WZYX;
		bool srgb = false;
		struct fd_resource *rsc = NULL;
		struct fd_resource_slice *slice = NULL;
		uint32_t stride = 0;
		uint32_t base = 0;
		uint32_t offset = 0;

		if ((i < nr_bufs) && bufs[i]) {
			struct pipe_surface *psurf = bufs[i];
			enum pipe_format pformat = psurf->format;

			rsc = fd_resource(psurf->texture);

			/* In case we're drawing to Z32F_S8, the "color" actually goes to
			 * the stencil
			 */
			if (rsc->stencil) {
				rsc = rsc->stencil;
				pformat = rsc->base.b.format;
				bases++;
			}

			slice = fd_resource_slice(rsc, psurf->u.tex.level);
			format = fd4_pipe2color(pformat);
			swap = fd4_pipe2swap(pformat);

			if (decode_srgb)
				srgb = util_format_is_srgb(pformat);
			else
				pformat = util_format_linear(pformat);

			debug_assert(psurf->u.tex.first_layer == psurf->u.tex.last_layer);

			offset = fd_resource_offset(rsc, psurf->u.tex.level,
					psurf->u.tex.first_layer);

			if (bin_w) {
				stride = bin_w * rsc->cpp;

				if (bases) {
					base = bases[i];
				}
			} else {
				stride = slice->pitch * rsc->cpp;
			}
		} else if ((i < nr_bufs) && bases) {
			base = bases[i];
		}

		OUT_PKT0(ring, REG_A4XX_RB_MRT_BUF_INFO(i), 3);
		OUT_RING(ring, A4XX_RB_MRT_BUF_INFO_COLOR_FORMAT(format) |
				A4XX_RB_MRT_BUF_INFO_COLOR_TILE_MODE(tile_mode) |
				A4XX_RB_MRT_BUF_INFO_COLOR_BUF_PITCH(stride) |
				A4XX_RB_MRT_BUF_INFO_COLOR_SWAP(swap) |
				COND(srgb, A4XX_RB_MRT_BUF_INFO_COLOR_SRGB));
		if (bin_w || (i >= nr_bufs) || !bufs[i]) {
			OUT_RING(ring, base);
			OUT_RING(ring, A4XX_RB_MRT_CONTROL3_STRIDE(stride));
		} else {
			OUT_RELOCW(ring, rsc->bo, offset, 0, 0);
			/* RB_MRT[i].CONTROL3.STRIDE not emitted by c2d..
			 * not sure if we need to skip it for bypass or
			 * not.
			 */
			OUT_RING(ring, A4XX_RB_MRT_CONTROL3_STRIDE(0));
		}
	}
}

/* transfer from gmem to system memory (ie. normal RAM) */

static void
emit_gmem2mem_surf(struct fd_context *ctx, bool stencil,
		uint32_t base, struct pipe_surface *psurf)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct fd_resource *rsc = fd_resource(psurf->texture);
	enum pipe_format pformat = psurf->format;
	struct fd_resource_slice *slice;
	uint32_t offset;

	if (stencil) {
		debug_assert(rsc->stencil);
		rsc = rsc->stencil;
		pformat = rsc->base.b.format;
	}

	slice = &rsc->slices[psurf->u.tex.level];
	offset = fd_resource_offset(rsc, psurf->u.tex.level,
			psurf->u.tex.first_layer);

	debug_assert(psurf->u.tex.first_layer == psurf->u.tex.last_layer);

	OUT_PKT0(ring, REG_A4XX_RB_COPY_CONTROL, 4);
	OUT_RING(ring, A4XX_RB_COPY_CONTROL_MSAA_RESOLVE(MSAA_ONE) |
			A4XX_RB_COPY_CONTROL_MODE(RB_COPY_RESOLVE) |
			A4XX_RB_COPY_CONTROL_GMEM_BASE(base));
	OUT_RELOCW(ring, rsc->bo, offset, 0, 0);   /* RB_COPY_DEST_BASE */
	OUT_RING(ring, A4XX_RB_COPY_DEST_PITCH_PITCH(slice->pitch * rsc->cpp));
	OUT_RING(ring, A4XX_RB_COPY_DEST_INFO_TILE(TILE4_LINEAR) |
			A4XX_RB_COPY_DEST_INFO_FORMAT(fd4_pipe2color(pformat)) |
			A4XX_RB_COPY_DEST_INFO_COMPONENT_ENABLE(0xf) |
			A4XX_RB_COPY_DEST_INFO_ENDIAN(ENDIAN_NONE) |
			A4XX_RB_COPY_DEST_INFO_SWAP(fd4_pipe2swap(pformat)));

	fd4_draw(ctx, ring, DI_PT_RECTLIST, IGNORE_VISIBILITY,
			DI_SRC_SEL_AUTO_INDEX, 2, 1, INDEX_SIZE_IGN, 0, 0, NULL);
}

static void
fd4_emit_tile_gmem2mem(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd4_context *fd4_ctx = fd4_context(ctx);
	struct fd_gmem_stateobj *gmem = &ctx->gmem;
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	struct fd4_emit emit = {
			.vtx = &fd4_ctx->solid_vbuf_state,
			.prog = &ctx->solid_prog,
			.key = {
				.half_precision = true,
			},
	};

	OUT_PKT0(ring, REG_A4XX_RB_DEPTH_CONTROL, 1);
	OUT_RING(ring, A4XX_RB_DEPTH_CONTROL_ZFUNC(FUNC_NEVER));

	OUT_PKT0(ring, REG_A4XX_RB_STENCIL_CONTROL, 2);
	OUT_RING(ring, A4XX_RB_STENCIL_CONTROL_FUNC(FUNC_NEVER) |
			A4XX_RB_STENCIL_CONTROL_FAIL(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZPASS(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZFAIL(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_FUNC_BF(FUNC_NEVER) |
			A4XX_RB_STENCIL_CONTROL_FAIL_BF(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZPASS_BF(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZFAIL_BF(STENCIL_KEEP));
	OUT_RING(ring, 0x00000000); /* RB_STENCIL_CONTROL2 */

	OUT_PKT0(ring, REG_A4XX_RB_STENCILREFMASK, 2);
	OUT_RING(ring, 0xff000000 |
			A4XX_RB_STENCILREFMASK_STENCILREF(0) |
			A4XX_RB_STENCILREFMASK_STENCILMASK(0) |
			A4XX_RB_STENCILREFMASK_STENCILWRITEMASK(0xff));
	OUT_RING(ring, 0xff000000 |
			A4XX_RB_STENCILREFMASK_BF_STENCILREF(0) |
			A4XX_RB_STENCILREFMASK_BF_STENCILMASK(0) |
			A4XX_RB_STENCILREFMASK_BF_STENCILWRITEMASK(0xff));

	OUT_PKT0(ring, REG_A4XX_GRAS_SU_MODE_CONTROL, 1);
	OUT_RING(ring, A4XX_GRAS_SU_MODE_CONTROL_LINEHALFWIDTH(0));

	fd_wfi(ctx, ring);

	OUT_PKT0(ring, REG_A4XX_GRAS_CL_CLIP_CNTL, 1);
	OUT_RING(ring, 0x80000);      /* GRAS_CL_CLIP_CNTL */

	OUT_PKT0(ring, REG_A4XX_GRAS_CL_VPORT_XOFFSET_0, 6);
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_XOFFSET_0((float)pfb->width/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_XSCALE_0((float)pfb->width/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_YOFFSET_0((float)pfb->height/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_YSCALE_0(-(float)pfb->height/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_ZOFFSET_0(0.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_ZSCALE_0(1.0));

	OUT_PKT0(ring, REG_A4XX_RB_RENDER_CONTROL, 1);
	OUT_RING(ring, A4XX_RB_RENDER_CONTROL_DISABLE_COLOR_PIPE |
			0xa);       /* XXX */

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_CONTROL, 1);
	OUT_RING(ring, A4XX_GRAS_SC_CONTROL_RENDER_MODE(RB_RESOLVE_PASS) |
			A4XX_GRAS_SC_CONTROL_MSAA_DISABLE |
			A4XX_GRAS_SC_CONTROL_MSAA_SAMPLES(MSAA_ONE) |
			A4XX_GRAS_SC_CONTROL_RASTER_MODE(1));

	OUT_PKT0(ring, REG_A4XX_PC_PRIM_VTX_CNTL, 1);
	OUT_RING(ring, A4XX_PC_PRIM_VTX_CNTL_PROVOKING_VTX_LAST);

	OUT_PKT0(ring, REG_A4XX_GRAS_ALPHA_CONTROL, 1);
	OUT_RING(ring, 0x00000002);

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_WINDOW_SCISSOR_BR, 2);
	OUT_RING(ring, A4XX_GRAS_SC_WINDOW_SCISSOR_BR_X(pfb->width - 1) |
			A4XX_GRAS_SC_WINDOW_SCISSOR_BR_Y(pfb->height - 1));
	OUT_RING(ring, A4XX_GRAS_SC_WINDOW_SCISSOR_TL_X(0) |
			A4XX_GRAS_SC_WINDOW_SCISSOR_TL_Y(0));

	OUT_PKT0(ring, REG_A4XX_VFD_INDEX_OFFSET, 2);
	OUT_RING(ring, 0);            /* VFD_INDEX_OFFSET */
	OUT_RING(ring, 0);            /* ??? UNKNOWN_2209 */

	fd4_program_emit(ring, &emit, 0, NULL);
	fd4_emit_vertex_bufs(ring, &emit);

	if (ctx->resolve & (FD_BUFFER_DEPTH | FD_BUFFER_STENCIL)) {
		struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
		if (!rsc->stencil || (ctx->resolve & FD_BUFFER_DEPTH))
			emit_gmem2mem_surf(ctx, false, ctx->gmem.zsbuf_base[0], pfb->zsbuf);
		if (rsc->stencil && (ctx->resolve & FD_BUFFER_STENCIL))
			emit_gmem2mem_surf(ctx, true, ctx->gmem.zsbuf_base[1], pfb->zsbuf);
	}

	if (ctx->resolve & FD_BUFFER_COLOR) {
		unsigned i;
		for (i = 0; i < pfb->nr_cbufs; i++) {
			if (!pfb->cbufs[i])
				continue;
			if (!(ctx->resolve & (PIPE_CLEAR_COLOR0 << i)))
				continue;
			emit_gmem2mem_surf(ctx, false, gmem->cbuf_base[i], pfb->cbufs[i]);
		}
	}

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_CONTROL, 1);
	OUT_RING(ring, A4XX_GRAS_SC_CONTROL_RENDER_MODE(RB_RENDERING_PASS) |
			A4XX_GRAS_SC_CONTROL_MSAA_DISABLE |
			A4XX_GRAS_SC_CONTROL_MSAA_SAMPLES(MSAA_ONE) |
			A4XX_GRAS_SC_CONTROL_RASTER_MODE(0));
}

/* transfer from system memory to gmem */

static void
emit_mem2gmem_surf(struct fd_context *ctx, uint32_t *bases,
		struct pipe_surface **bufs, uint32_t nr_bufs, uint32_t bin_w)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_surface *zsbufs[2];

	emit_mrt(ring, nr_bufs, bufs, bases, bin_w, false);

	if (bufs[0] && (bufs[0]->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT)) {
		/* The gmem_restore_tex logic will put the first buffer's stencil
		 * as color. Supply it with the proper information to make that
		 * happen.
		 */
		zsbufs[0] = zsbufs[1] = bufs[0];
		bufs = zsbufs;
		nr_bufs = 2;
	}

	fd4_emit_gmem_restore_tex(ring, nr_bufs, bufs);

	fd4_draw(ctx, ring, DI_PT_RECTLIST, IGNORE_VISIBILITY,
			DI_SRC_SEL_AUTO_INDEX, 2, 1, INDEX_SIZE_IGN, 0, 0, NULL);
}

static void
fd4_emit_tile_mem2gmem(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd4_context *fd4_ctx = fd4_context(ctx);
	struct fd_gmem_stateobj *gmem = &ctx->gmem;
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	struct fd4_emit emit = {
			.vtx = &fd4_ctx->blit_vbuf_state,
			.sprite_coord_enable = 1,
			/* NOTE: They all use the same VP, this is for vtx bufs. */
			.prog = &ctx->blit_prog[0],
			.key = {
				.half_precision = fd_half_precision(pfb),
			},
			.no_decode_srgb = true,
	};
	unsigned char mrt_comp[A4XX_MAX_RENDER_TARGETS] = {0};
	float x0, y0, x1, y1;
	unsigned bin_w = tile->bin_w;
	unsigned bin_h = tile->bin_h;
	unsigned i;

	/* write texture coordinates to vertexbuf: */
	x0 = ((float)tile->xoff) / ((float)pfb->width);
	x1 = ((float)tile->xoff + bin_w) / ((float)pfb->width);
	y0 = ((float)tile->yoff) / ((float)pfb->height);
	y1 = ((float)tile->yoff + bin_h) / ((float)pfb->height);

	OUT_PKT3(ring, CP_MEM_WRITE, 5);
	OUT_RELOCW(ring, fd_resource(fd4_ctx->blit_texcoord_vbuf)->bo, 0, 0, 0);
	OUT_RING(ring, fui(x0));
	OUT_RING(ring, fui(y0));
	OUT_RING(ring, fui(x1));
	OUT_RING(ring, fui(y1));

	for (i = 0; i < A4XX_MAX_RENDER_TARGETS; i++) {
		mrt_comp[i] = ((i < pfb->nr_cbufs) && pfb->cbufs[i]) ? 0xf : 0;

		OUT_PKT0(ring, REG_A4XX_RB_MRT_CONTROL(i), 1);
		OUT_RING(ring, A4XX_RB_MRT_CONTROL_ROP_CODE(ROP_COPY) |
				A4XX_RB_MRT_CONTROL_COMPONENT_ENABLE(0xf));

		OUT_PKT0(ring, REG_A4XX_RB_MRT_BLEND_CONTROL(i), 1);
		OUT_RING(ring, A4XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(FACTOR_ONE) |
				A4XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(BLEND_DST_PLUS_SRC) |
				A4XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(FACTOR_ZERO) |
				A4XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(FACTOR_ONE) |
				A4XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(BLEND_DST_PLUS_SRC) |
				A4XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(FACTOR_ZERO));
	}

	OUT_PKT0(ring, REG_A4XX_RB_RENDER_COMPONENTS, 1);
	OUT_RING(ring, A4XX_RB_RENDER_COMPONENTS_RT0(mrt_comp[0]) |
			A4XX_RB_RENDER_COMPONENTS_RT1(mrt_comp[1]) |
			A4XX_RB_RENDER_COMPONENTS_RT2(mrt_comp[2]) |
			A4XX_RB_RENDER_COMPONENTS_RT3(mrt_comp[3]) |
			A4XX_RB_RENDER_COMPONENTS_RT4(mrt_comp[4]) |
			A4XX_RB_RENDER_COMPONENTS_RT5(mrt_comp[5]) |
			A4XX_RB_RENDER_COMPONENTS_RT6(mrt_comp[6]) |
			A4XX_RB_RENDER_COMPONENTS_RT7(mrt_comp[7]));

	OUT_PKT0(ring, REG_A4XX_RB_RENDER_CONTROL, 1);
	OUT_RING(ring, 0x8);          /* XXX RB_RENDER_CONTROL */

	OUT_PKT0(ring, REG_A4XX_RB_DEPTH_CONTROL, 1);
	OUT_RING(ring, A4XX_RB_DEPTH_CONTROL_ZFUNC(FUNC_LESS));

	OUT_PKT0(ring, REG_A4XX_GRAS_CL_CLIP_CNTL, 1);
	OUT_RING(ring, 0x280000);     /* XXX GRAS_CL_CLIP_CNTL */

	OUT_PKT0(ring, REG_A4XX_GRAS_SU_MODE_CONTROL, 1);
	OUT_RING(ring, A4XX_GRAS_SU_MODE_CONTROL_LINEHALFWIDTH(0) |
			A4XX_GRAS_SU_MODE_CONTROL_RENDERING_PASS);

	OUT_PKT0(ring, REG_A4XX_GRAS_CL_VPORT_XOFFSET_0, 6);
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_XOFFSET_0((float)bin_w/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_XSCALE_0((float)bin_w/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_YOFFSET_0((float)bin_h/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_YSCALE_0(-(float)bin_h/2.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_ZOFFSET_0(0.0));
	OUT_RING(ring, A4XX_GRAS_CL_VPORT_ZSCALE_0(1.0));

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_WINDOW_SCISSOR_BR, 2);
	OUT_RING(ring, A4XX_GRAS_SC_WINDOW_SCISSOR_BR_X(bin_w - 1) |
			A4XX_GRAS_SC_WINDOW_SCISSOR_BR_Y(bin_h - 1));
	OUT_RING(ring, A4XX_GRAS_SC_WINDOW_SCISSOR_TL_X(0) |
			A4XX_GRAS_SC_WINDOW_SCISSOR_TL_Y(0));

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_SCREEN_SCISSOR_TL, 2);
	OUT_RING(ring, A4XX_GRAS_SC_SCREEN_SCISSOR_TL_X(0) |
			A4XX_GRAS_SC_SCREEN_SCISSOR_TL_Y(0));
	OUT_RING(ring, A4XX_GRAS_SC_SCREEN_SCISSOR_BR_X(bin_w - 1) |
			A4XX_GRAS_SC_SCREEN_SCISSOR_BR_Y(bin_h - 1));

	OUT_PKT0(ring, REG_A4XX_RB_MODE_CONTROL, 1);
	OUT_RING(ring, A4XX_RB_MODE_CONTROL_WIDTH(gmem->bin_w) |
			A4XX_RB_MODE_CONTROL_HEIGHT(gmem->bin_h));

	OUT_PKT0(ring, REG_A4XX_RB_STENCIL_CONTROL, 2);
	OUT_RING(ring, A4XX_RB_STENCIL_CONTROL_FUNC(FUNC_ALWAYS) |
			A4XX_RB_STENCIL_CONTROL_FAIL(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZPASS(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZFAIL(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_FUNC_BF(FUNC_ALWAYS) |
			A4XX_RB_STENCIL_CONTROL_FAIL_BF(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZPASS_BF(STENCIL_KEEP) |
			A4XX_RB_STENCIL_CONTROL_ZFAIL_BF(STENCIL_KEEP));
	OUT_RING(ring, 0x00000000); /* RB_STENCIL_CONTROL2 */

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_CONTROL, 1);
	OUT_RING(ring, A4XX_GRAS_SC_CONTROL_RENDER_MODE(RB_RENDERING_PASS) |
			A4XX_GRAS_SC_CONTROL_MSAA_DISABLE |
			A4XX_GRAS_SC_CONTROL_MSAA_SAMPLES(MSAA_ONE) |
			A4XX_GRAS_SC_CONTROL_RASTER_MODE(1));

	OUT_PKT0(ring, REG_A4XX_PC_PRIM_VTX_CNTL, 1);
	OUT_RING(ring, A4XX_PC_PRIM_VTX_CNTL_PROVOKING_VTX_LAST |
			A4XX_PC_PRIM_VTX_CNTL_VAROUT(1));

	OUT_PKT0(ring, REG_A4XX_VFD_INDEX_OFFSET, 2);
	OUT_RING(ring, 0);            /* VFD_INDEX_OFFSET */
	OUT_RING(ring, 0);            /* ??? UNKNOWN_2209 */

	fd4_emit_vertex_bufs(ring, &emit);

	/* for gmem pitch/base calculations, we need to use the non-
	 * truncated tile sizes:
	 */
	bin_w = gmem->bin_w;
	bin_h = gmem->bin_h;

	if (fd_gmem_needs_restore(ctx, tile, FD_BUFFER_COLOR)) {
		emit.prog = &ctx->blit_prog[pfb->nr_cbufs - 1];
		emit.fp = NULL;      /* frag shader changed so clear cache */
		fd4_program_emit(ring, &emit, pfb->nr_cbufs, pfb->cbufs);
		emit_mem2gmem_surf(ctx, gmem->cbuf_base, pfb->cbufs, pfb->nr_cbufs, bin_w);
	}

	if (fd_gmem_needs_restore(ctx, tile, FD_BUFFER_DEPTH | FD_BUFFER_STENCIL)) {
		switch (pfb->zsbuf->format) {
		case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
		case PIPE_FORMAT_Z32_FLOAT:
			emit.prog = (pfb->zsbuf->format == PIPE_FORMAT_Z32_FLOAT) ?
					&ctx->blit_z : &ctx->blit_zs;
			emit.key.half_precision = false;

			OUT_PKT0(ring, REG_A4XX_RB_DEPTH_CONTROL, 1);
			OUT_RING(ring, A4XX_RB_DEPTH_CONTROL_Z_ENABLE |
					A4XX_RB_DEPTH_CONTROL_Z_WRITE_ENABLE |
					A4XX_RB_DEPTH_CONTROL_ZFUNC(FUNC_ALWAYS) |
					A4XX_RB_DEPTH_CONTROL_EARLY_Z_DISABLE);

			OUT_PKT0(ring, REG_A4XX_GRAS_ALPHA_CONTROL, 1);
			OUT_RING(ring, A4XX_GRAS_ALPHA_CONTROL_ALPHA_TEST_ENABLE);

			OUT_PKT0(ring, REG_A4XX_GRAS_CL_CLIP_CNTL, 1);
			OUT_RING(ring, 0x80000);   /* GRAS_CL_CLIP_CNTL */

			break;
		default:
			/* Non-float can use a regular color write. It's split over 8-bit
			 * components, so half precision is always sufficient.
			 */
			emit.prog = &ctx->blit_prog[0];
			emit.key.half_precision = true;
			break;
		}
		emit.fp = NULL;      /* frag shader changed so clear cache */
		fd4_program_emit(ring, &emit, 1, &pfb->zsbuf);
		emit_mem2gmem_surf(ctx, gmem->zsbuf_base, &pfb->zsbuf, 1, bin_w);
	}

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_CONTROL, 1);
	OUT_RING(ring, A4XX_GRAS_SC_CONTROL_RENDER_MODE(RB_RENDERING_PASS) |
			A4XX_GRAS_SC_CONTROL_MSAA_SAMPLES(MSAA_ONE) |
			A4XX_GRAS_SC_CONTROL_RASTER_MODE(0));

	OUT_PKT0(ring, REG_A4XX_RB_MODE_CONTROL, 1);
	OUT_RING(ring, A4XX_RB_MODE_CONTROL_WIDTH(gmem->bin_w) |
			A4XX_RB_MODE_CONTROL_HEIGHT(gmem->bin_h) |
			0x00010000);  /* XXX */
}

static void
patch_draws(struct fd_context *ctx, enum pc_di_vis_cull_mode vismode)
{
	unsigned i;
	for (i = 0; i < fd_patch_num_elements(&ctx->draw_patches); i++) {
		struct fd_cs_patch *patch = fd_patch_element(&ctx->draw_patches, i);
		*patch->cs = patch->val | DRAW4(0, 0, 0, vismode);
	}
	util_dynarray_resize(&ctx->draw_patches, 0);
}

static void
patch_rbrc(struct fd_context *ctx, uint32_t val)
{
	struct fd4_context *fd4_ctx = fd4_context(ctx);
	unsigned i;
	for (i = 0; i < fd_patch_num_elements(&fd4_ctx->rbrc_patches); i++) {
		struct fd_cs_patch *patch = fd_patch_element(&fd4_ctx->rbrc_patches, i);
		*patch->cs = patch->val | val;
	}
	util_dynarray_resize(&fd4_ctx->rbrc_patches, 0);
}

/* for rendering directly to system memory: */
static void
fd4_emit_sysmem_prep(struct fd_context *ctx)
{
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	struct fd_ringbuffer *ring = ctx->ring;

	fd4_emit_restore(ctx);

	OUT_PKT0(ring, REG_A4XX_RB_FRAME_BUFFER_DIMENSION, 1);
	OUT_RING(ring, A4XX_RB_FRAME_BUFFER_DIMENSION_WIDTH(pfb->width) |
			A4XX_RB_FRAME_BUFFER_DIMENSION_HEIGHT(pfb->height));

	emit_mrt(ring, pfb->nr_cbufs, pfb->cbufs, NULL, 0, true);

	/* setup scissor/offset for current tile: */
	OUT_PKT0(ring, REG_A4XX_RB_BIN_OFFSET, 1);
	OUT_RING(ring, A4XX_RB_BIN_OFFSET_X(0) |
			A4XX_RB_BIN_OFFSET_Y(0));

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_SCREEN_SCISSOR_TL, 2);
	OUT_RING(ring, A4XX_GRAS_SC_SCREEN_SCISSOR_TL_X(0) |
			A4XX_GRAS_SC_SCREEN_SCISSOR_TL_Y(0));
	OUT_RING(ring, A4XX_GRAS_SC_SCREEN_SCISSOR_BR_X(pfb->width - 1) |
			A4XX_GRAS_SC_SCREEN_SCISSOR_BR_Y(pfb->height - 1));

	OUT_PKT0(ring, REG_A4XX_RB_MODE_CONTROL, 1);
	OUT_RING(ring, A4XX_RB_MODE_CONTROL_WIDTH(0) |
			A4XX_RB_MODE_CONTROL_HEIGHT(0) |
			0x00c00000);  /* XXX */

	patch_draws(ctx, IGNORE_VISIBILITY);
	patch_rbrc(ctx, 0);  // XXX
}

static void
update_vsc_pipe(struct fd_context *ctx)
{
	struct fd4_context *fd4_ctx = fd4_context(ctx);
	struct fd_ringbuffer *ring = ctx->ring;
	int i;

	OUT_PKT0(ring, REG_A4XX_VSC_SIZE_ADDRESS, 1);
	OUT_RELOCW(ring, fd4_ctx->vsc_size_mem, 0, 0, 0); /* VSC_SIZE_ADDRESS */

	OUT_PKT0(ring, REG_A4XX_VSC_PIPE_CONFIG_REG(0), 8);
	for (i = 0; i < 8; i++) {
		struct fd_vsc_pipe *pipe = &ctx->pipe[i];
		OUT_RING(ring, A4XX_VSC_PIPE_CONFIG_REG_X(pipe->x) |
				A4XX_VSC_PIPE_CONFIG_REG_Y(pipe->y) |
				A4XX_VSC_PIPE_CONFIG_REG_W(pipe->w) |
				A4XX_VSC_PIPE_CONFIG_REG_H(pipe->h));
	}

	OUT_PKT0(ring, REG_A4XX_VSC_PIPE_DATA_ADDRESS_REG(0), 8);
	for (i = 0; i < 8; i++) {
		struct fd_vsc_pipe *pipe = &ctx->pipe[i];
		if (!pipe->bo) {
			pipe->bo = fd_bo_new(ctx->dev, 0x40000,
					DRM_FREEDRENO_GEM_TYPE_KMEM);
		}
		OUT_RELOCW(ring, pipe->bo, 0, 0, 0);       /* VSC_PIPE_DATA_ADDRESS[i] */
	}

	OUT_PKT0(ring, REG_A4XX_VSC_PIPE_DATA_LENGTH_REG(0), 8);
	for (i = 0; i < 8; i++) {
		struct fd_vsc_pipe *pipe = &ctx->pipe[i];
		OUT_RING(ring, fd_bo_size(pipe->bo) - 32); /* VSC_PIPE_DATA_LENGTH[i] */
	}
}

/* before first tile */
static void
fd4_emit_tile_init(struct fd_context *ctx)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct fd_gmem_stateobj *gmem = &ctx->gmem;
	uint32_t rb_render_control;

	fd4_emit_restore(ctx);

	OUT_PKT0(ring, REG_A4XX_VSC_BIN_SIZE, 1);
	OUT_RING(ring, A4XX_VSC_BIN_SIZE_WIDTH(gmem->bin_w) |
			A4XX_VSC_BIN_SIZE_HEIGHT(gmem->bin_h));

	OUT_PKT0(ring, REG_A4XX_RB_MODE_CONTROL, 1);
	OUT_RING(ring, A4XX_RB_MODE_CONTROL_WIDTH(gmem->bin_w) |
			A4XX_RB_MODE_CONTROL_HEIGHT(gmem->bin_h) |
			0x00010000);  /* XXX */

	update_vsc_pipe(ctx);
	patch_draws(ctx, IGNORE_VISIBILITY);

	rb_render_control = 0; // XXX or BINNING_PASS.. but maybe we can emit only from gmem
	patch_rbrc(ctx, rb_render_control);
}

/* before mem2gmem */
static void
fd4_emit_tile_prep(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	struct fd_gmem_stateobj *gmem = &ctx->gmem;

	if (pfb->zsbuf) {
		struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
		uint32_t cpp = rsc->cpp;

		OUT_PKT0(ring, REG_A4XX_RB_DEPTH_INFO, 3);
		OUT_RING(ring, A4XX_RB_DEPTH_INFO_DEPTH_BASE(gmem->zsbuf_base[0]) |
				A4XX_RB_DEPTH_INFO_DEPTH_FORMAT(fd4_pipe2depth(pfb->zsbuf->format)));
		OUT_RING(ring, A4XX_RB_DEPTH_PITCH(cpp * gmem->bin_w));
		OUT_RING(ring, A4XX_RB_DEPTH_PITCH2(cpp * gmem->bin_w));

		OUT_PKT0(ring, REG_A4XX_RB_STENCIL_INFO, 2);
		if (rsc->stencil) {
			OUT_RING(ring, A4XX_RB_STENCIL_INFO_SEPARATE_STENCIL |
					A4XX_RB_STENCIL_INFO_STENCIL_BASE(gmem->zsbuf_base[1]));
			OUT_RING(ring, A4XX_RB_STENCIL_PITCH(rsc->stencil->cpp * gmem->bin_w));
		} else {
			OUT_RING(ring, 0x00000000);
			OUT_RING(ring, 0x00000000);
		}
	} else {
		OUT_PKT0(ring, REG_A4XX_RB_DEPTH_INFO, 3);
		OUT_RING(ring, 0x00000000);
		OUT_RING(ring, 0x00000000);
		OUT_RING(ring, 0x00000000);

		OUT_PKT0(ring, REG_A4XX_RB_STENCIL_INFO, 2);
		OUT_RING(ring, 0);            /* RB_STENCIL_INFO */
		OUT_RING(ring, 0);            /* RB_STENCIL_PITCH */
	}

	OUT_PKT0(ring, REG_A4XX_GRAS_DEPTH_CONTROL, 1);
	if (pfb->zsbuf) {
		OUT_RING(ring, A4XX_GRAS_DEPTH_CONTROL_FORMAT(
				fd4_pipe2depth(pfb->zsbuf->format)));
	} else {
		OUT_RING(ring, A4XX_GRAS_DEPTH_CONTROL_FORMAT(DEPTH4_NONE));
	}

	if (ctx->needs_rb_fbd) {
		fd_wfi(ctx, ring);
		OUT_PKT0(ring, REG_A4XX_RB_FRAME_BUFFER_DIMENSION, 1);
		OUT_RING(ring, A4XX_RB_FRAME_BUFFER_DIMENSION_WIDTH(pfb->width) |
				A4XX_RB_FRAME_BUFFER_DIMENSION_HEIGHT(pfb->height));
		ctx->needs_rb_fbd = false;
	}
}

/* before IB to rendering cmds: */
static void
fd4_emit_tile_renderprep(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct fd_gmem_stateobj *gmem = &ctx->gmem;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;

	uint32_t x1 = tile->xoff;
	uint32_t y1 = tile->yoff;
	uint32_t x2 = tile->xoff + tile->bin_w - 1;
	uint32_t y2 = tile->yoff + tile->bin_h - 1;

	OUT_PKT3(ring, CP_SET_BIN, 3);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, CP_SET_BIN_1_X1(x1) | CP_SET_BIN_1_Y1(y1));
	OUT_RING(ring, CP_SET_BIN_2_X2(x2) | CP_SET_BIN_2_Y2(y2));

	emit_mrt(ring, pfb->nr_cbufs, pfb->cbufs, gmem->cbuf_base, gmem->bin_w, true);

	/* setup scissor/offset for current tile: */
	OUT_PKT0(ring, REG_A4XX_RB_BIN_OFFSET, 1);
	OUT_RING(ring, A4XX_RB_BIN_OFFSET_X(tile->xoff) |
			A4XX_RB_BIN_OFFSET_Y(tile->yoff));

	OUT_PKT0(ring, REG_A4XX_GRAS_SC_SCREEN_SCISSOR_TL, 2);
	OUT_RING(ring, A4XX_GRAS_SC_SCREEN_SCISSOR_TL_X(x1) |
			A4XX_GRAS_SC_SCREEN_SCISSOR_TL_Y(y1));
	OUT_RING(ring, A4XX_GRAS_SC_SCREEN_SCISSOR_BR_X(x2) |
			A4XX_GRAS_SC_SCREEN_SCISSOR_BR_Y(y2));
}

void
fd4_gmem_init(struct pipe_context *pctx)
{
	struct fd_context *ctx = fd_context(pctx);

	ctx->emit_sysmem_prep = fd4_emit_sysmem_prep;
	ctx->emit_tile_init = fd4_emit_tile_init;
	ctx->emit_tile_prep = fd4_emit_tile_prep;
	ctx->emit_tile_mem2gmem = fd4_emit_tile_mem2gmem;
	ctx->emit_tile_renderprep = fd4_emit_tile_renderprep;
	ctx->emit_tile_gmem2mem = fd4_emit_tile_gmem2mem;
}
