/* -*- 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 "pipe/p_state.h"
#include "util/u_string.h"
#include "util/u_memory.h"
#include "util/u_inlines.h"

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

#include "fd2_gmem.h"
#include "fd2_context.h"
#include "fd2_emit.h"
#include "fd2_program.h"
#include "fd2_util.h"
#include "fd2_zsa.h"

static uint32_t fmt2swap(enum pipe_format format)
{
	switch (format) {
	case PIPE_FORMAT_B8G8R8A8_UNORM:
	/* TODO probably some more.. */
		return 1;
	default:
		return 0;
	}
}

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

static void
emit_gmem2mem_surf(struct fd_context *ctx, uint32_t base,
		struct pipe_surface *psurf)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct fd_resource *rsc = fd_resource(psurf->texture);
	uint32_t swap = fmt2swap(psurf->format);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_INFO));
	OUT_RING(ring, A2XX_RB_COLOR_INFO_SWAP(swap) |
			A2XX_RB_COLOR_INFO_BASE(base) |
			A2XX_RB_COLOR_INFO_FORMAT(fd2_pipe2color(psurf->format)));

	OUT_PKT3(ring, CP_SET_CONSTANT, 5);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_COPY_CONTROL));
	OUT_RING(ring, 0x00000000);             /* RB_COPY_CONTROL */
	OUT_RELOCW(ring, rsc->bo, 0, 0, 0);     /* RB_COPY_DEST_BASE */
	OUT_RING(ring, rsc->slices[0].pitch >> 5); /* RB_COPY_DEST_PITCH */
	OUT_RING(ring,                          /* RB_COPY_DEST_INFO */
			A2XX_RB_COPY_DEST_INFO_FORMAT(fd2_pipe2color(psurf->format)) |
			A2XX_RB_COPY_DEST_INFO_LINEAR |
			A2XX_RB_COPY_DEST_INFO_SWAP(swap) |
			A2XX_RB_COPY_DEST_INFO_WRITE_RED |
			A2XX_RB_COPY_DEST_INFO_WRITE_GREEN |
			A2XX_RB_COPY_DEST_INFO_WRITE_BLUE |
			A2XX_RB_COPY_DEST_INFO_WRITE_ALPHA);

	OUT_WFI (ring);

	OUT_PKT3(ring, CP_SET_CONSTANT, 3);
	OUT_RING(ring, CP_REG(REG_A2XX_VGT_MAX_VTX_INDX));
	OUT_RING(ring, 3);                 /* VGT_MAX_VTX_INDX */
	OUT_RING(ring, 0);                 /* VGT_MIN_VTX_INDX */

	fd_draw(ctx, ring, DI_PT_RECTLIST, IGNORE_VISIBILITY,
			DI_SRC_SEL_AUTO_INDEX, 3, INDEX_SIZE_IGN, 0, 0, NULL);
}

static void
fd2_emit_tile_gmem2mem(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd2_context *fd2_ctx = fd2_context(ctx);
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;

	fd2_emit_vertex_bufs(ring, 0x9c, (struct fd2_vertex_buf[]) {
			{ .prsc = fd2_ctx->solid_vertexbuf, .size = 48 },
		}, 1);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_WINDOW_OFFSET));
	OUT_RING(ring, 0x00000000);          /* PA_SC_WINDOW_OFFSET */

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_VGT_INDX_OFFSET));
	OUT_RING(ring, 0);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_VGT_VERTEX_REUSE_BLOCK_CNTL));
	OUT_RING(ring, 0x0000028f);

	fd2_program_emit(ring, &ctx->solid_prog);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_AA_MASK));
	OUT_RING(ring, 0x0000ffff);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_DEPTHCONTROL));
	OUT_RING(ring, A2XX_RB_DEPTHCONTROL_EARLY_Z_ENABLE);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SU_SC_MODE_CNTL));
	OUT_RING(ring, A2XX_PA_SU_SC_MODE_CNTL_PROVOKING_VTX_LAST |  /* PA_SU_SC_MODE_CNTL */
			A2XX_PA_SU_SC_MODE_CNTL_FRONT_PTYPE(PC_DRAW_TRIANGLES) |
			A2XX_PA_SU_SC_MODE_CNTL_BACK_PTYPE(PC_DRAW_TRIANGLES));

	OUT_PKT3(ring, CP_SET_CONSTANT, 3);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_WINDOW_SCISSOR_TL));
	OUT_RING(ring, xy2d(0, 0));                       /* PA_SC_WINDOW_SCISSOR_TL */
	OUT_RING(ring, xy2d(pfb->width, pfb->height));    /* PA_SC_WINDOW_SCISSOR_BR */

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_VTE_CNTL));
	OUT_RING(ring, A2XX_PA_CL_VTE_CNTL_VTX_W0_FMT |
			A2XX_PA_CL_VTE_CNTL_VPORT_X_SCALE_ENA |
			A2XX_PA_CL_VTE_CNTL_VPORT_X_OFFSET_ENA |
			A2XX_PA_CL_VTE_CNTL_VPORT_Y_SCALE_ENA |
			A2XX_PA_CL_VTE_CNTL_VPORT_Y_OFFSET_ENA);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_CLIP_CNTL));
	OUT_RING(ring, 0x00000000);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_MODECONTROL));
	OUT_RING(ring, A2XX_RB_MODECONTROL_EDRAM_MODE(EDRAM_COPY));

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_COPY_DEST_OFFSET));
	OUT_RING(ring, A2XX_RB_COPY_DEST_OFFSET_X(tile->xoff) |
			A2XX_RB_COPY_DEST_OFFSET_Y(tile->yoff));

	if (ctx->resolve & (FD_BUFFER_DEPTH | FD_BUFFER_STENCIL))
		emit_gmem2mem_surf(ctx, tile->bin_w * tile->bin_h, pfb->zsbuf);

	if (ctx->resolve & FD_BUFFER_COLOR)
		emit_gmem2mem_surf(ctx, 0, pfb->cbufs[0]);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_MODECONTROL));
	OUT_RING(ring, A2XX_RB_MODECONTROL_EDRAM_MODE(COLOR_DEPTH));
}

/* transfer from system memory to gmem */

static void
emit_mem2gmem_surf(struct fd_context *ctx, uint32_t base,
		struct pipe_surface *psurf)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct fd_resource *rsc = fd_resource(psurf->texture);
	uint32_t swiz;

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_INFO));
	OUT_RING(ring, A2XX_RB_COLOR_INFO_SWAP(fmt2swap(psurf->format)) |
			A2XX_RB_COLOR_INFO_BASE(base) |
			A2XX_RB_COLOR_INFO_FORMAT(fd2_pipe2color(psurf->format)));

	swiz = fd2_tex_swiz(psurf->format, PIPE_SWIZZLE_RED, PIPE_SWIZZLE_GREEN,
			PIPE_SWIZZLE_BLUE, PIPE_SWIZZLE_ALPHA);

	/* emit fb as a texture: */
	OUT_PKT3(ring, CP_SET_CONSTANT, 7);
	OUT_RING(ring, 0x00010000);
	OUT_RING(ring, A2XX_SQ_TEX_0_CLAMP_X(SQ_TEX_WRAP) |
			A2XX_SQ_TEX_0_CLAMP_Y(SQ_TEX_WRAP) |
			A2XX_SQ_TEX_0_CLAMP_Z(SQ_TEX_WRAP) |
			A2XX_SQ_TEX_0_PITCH(rsc->slices[0].pitch));
	OUT_RELOC(ring, rsc->bo, 0,
			fd2_pipe2surface(psurf->format) | 0x800, 0);
	OUT_RING(ring, A2XX_SQ_TEX_2_WIDTH(psurf->width - 1) |
			A2XX_SQ_TEX_2_HEIGHT(psurf->height - 1));
	OUT_RING(ring, 0x01000000 | // XXX
			swiz |
			A2XX_SQ_TEX_3_XY_MAG_FILTER(SQ_TEX_FILTER_POINT) |
			A2XX_SQ_TEX_3_XY_MIN_FILTER(SQ_TEX_FILTER_POINT));
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000200);

	OUT_PKT3(ring, CP_SET_CONSTANT, 3);
	OUT_RING(ring, CP_REG(REG_A2XX_VGT_MAX_VTX_INDX));
	OUT_RING(ring, 3);                 /* VGT_MAX_VTX_INDX */
	OUT_RING(ring, 0);                 /* VGT_MIN_VTX_INDX */

	fd_draw(ctx, ring, DI_PT_RECTLIST, IGNORE_VISIBILITY,
			DI_SRC_SEL_AUTO_INDEX, 3, INDEX_SIZE_IGN, 0, 0, NULL);
}

static void
fd2_emit_tile_mem2gmem(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd2_context *fd2_ctx = fd2_context(ctx);
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	unsigned bin_w = tile->bin_w;
	unsigned bin_h = tile->bin_h;
	float x0, y0, x1, y1;

	fd2_emit_vertex_bufs(ring, 0x9c, (struct fd2_vertex_buf[]) {
			{ .prsc = fd2_ctx->solid_vertexbuf, .size = 48, .offset = 0x30 },
			{ .prsc = fd2_ctx->solid_vertexbuf, .size = 32, .offset = 0x60 },
		}, 2);

	/* 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, 9);
	OUT_RELOC(ring, fd_resource(fd2_ctx->solid_vertexbuf)->bo, 0x60, 0, 0);
	OUT_RING(ring, fui(x0));
	OUT_RING(ring, fui(y0));
	OUT_RING(ring, fui(x1));
	OUT_RING(ring, fui(y0));
	OUT_RING(ring, fui(x0));
	OUT_RING(ring, fui(y1));
	OUT_RING(ring, fui(x1));
	OUT_RING(ring, fui(y1));

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_VGT_INDX_OFFSET));
	OUT_RING(ring, 0);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_VGT_VERTEX_REUSE_BLOCK_CNTL));
	OUT_RING(ring, 0x0000003b);

	fd2_program_emit(ring, &ctx->blit_prog);

	OUT_PKT0(ring, REG_A2XX_TC_CNTL_STATUS, 1);
	OUT_RING(ring, A2XX_TC_CNTL_STATUS_L2_INVALIDATE);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_DEPTHCONTROL));
	OUT_RING(ring, A2XX_RB_DEPTHCONTROL_EARLY_Z_ENABLE);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SU_SC_MODE_CNTL));
	OUT_RING(ring, A2XX_PA_SU_SC_MODE_CNTL_PROVOKING_VTX_LAST |
			A2XX_PA_SU_SC_MODE_CNTL_FRONT_PTYPE(PC_DRAW_TRIANGLES) |
			A2XX_PA_SU_SC_MODE_CNTL_BACK_PTYPE(PC_DRAW_TRIANGLES));

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_AA_MASK));
	OUT_RING(ring, 0x0000ffff);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_COLORCONTROL));
	OUT_RING(ring, A2XX_RB_COLORCONTROL_ALPHA_FUNC(PIPE_FUNC_ALWAYS) |
			A2XX_RB_COLORCONTROL_BLEND_DISABLE |
			A2XX_RB_COLORCONTROL_ROP_CODE(12) |
			A2XX_RB_COLORCONTROL_DITHER_MODE(DITHER_DISABLE) |
			A2XX_RB_COLORCONTROL_DITHER_TYPE(DITHER_PIXEL));

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_BLEND_CONTROL));
	OUT_RING(ring, A2XX_RB_BLEND_CONTROL_COLOR_SRCBLEND(FACTOR_ONE) |
			A2XX_RB_BLEND_CONTROL_COLOR_COMB_FCN(BLEND_DST_PLUS_SRC) |
			A2XX_RB_BLEND_CONTROL_COLOR_DESTBLEND(FACTOR_ZERO) |
			A2XX_RB_BLEND_CONTROL_ALPHA_SRCBLEND(FACTOR_ONE) |
			A2XX_RB_BLEND_CONTROL_ALPHA_COMB_FCN(BLEND_DST_PLUS_SRC) |
			A2XX_RB_BLEND_CONTROL_ALPHA_DESTBLEND(FACTOR_ZERO));

	OUT_PKT3(ring, CP_SET_CONSTANT, 3);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_WINDOW_SCISSOR_TL));
	OUT_RING(ring, A2XX_PA_SC_WINDOW_OFFSET_DISABLE |
			xy2d(0,0));                     /* PA_SC_WINDOW_SCISSOR_TL */
	OUT_RING(ring, xy2d(bin_w, bin_h));     /* PA_SC_WINDOW_SCISSOR_BR */

	OUT_PKT3(ring, CP_SET_CONSTANT, 5);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_VPORT_XSCALE));
	OUT_RING(ring, fui((float)bin_w/2.0));  /* PA_CL_VPORT_XSCALE */
	OUT_RING(ring, fui((float)bin_w/2.0));  /* PA_CL_VPORT_XOFFSET */
	OUT_RING(ring, fui(-(float)bin_h/2.0)); /* PA_CL_VPORT_YSCALE */
	OUT_RING(ring, fui((float)bin_h/2.0));  /* PA_CL_VPORT_YOFFSET */

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_VTE_CNTL));
	OUT_RING(ring, A2XX_PA_CL_VTE_CNTL_VTX_XY_FMT |
			A2XX_PA_CL_VTE_CNTL_VTX_Z_FMT |       // XXX check this???
			A2XX_PA_CL_VTE_CNTL_VPORT_X_SCALE_ENA |
			A2XX_PA_CL_VTE_CNTL_VPORT_X_OFFSET_ENA |
			A2XX_PA_CL_VTE_CNTL_VPORT_Y_SCALE_ENA |
			A2XX_PA_CL_VTE_CNTL_VPORT_Y_OFFSET_ENA);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_CLIP_CNTL));
	OUT_RING(ring, 0x00000000);

	if (fd_gmem_needs_restore(ctx, tile, FD_BUFFER_DEPTH | FD_BUFFER_STENCIL))
		emit_mem2gmem_surf(ctx, bin_w * bin_h, pfb->zsbuf);

	if (fd_gmem_needs_restore(ctx, tile, FD_BUFFER_COLOR))
		emit_mem2gmem_surf(ctx, 0, pfb->cbufs[0]);

	/* TODO blob driver seems to toss in a CACHE_FLUSH after each DRAW_INDX.. */
}

/* before first tile */
static void
fd2_emit_tile_init(struct fd_context *ctx)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	struct fd_gmem_stateobj *gmem = &ctx->gmem;
	enum pipe_format format = pipe_surface_format(pfb->cbufs[0]);
	uint32_t reg;

	OUT_PKT3(ring, CP_SET_CONSTANT, 4);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_SURFACE_INFO));
	OUT_RING(ring, gmem->bin_w);                 /* RB_SURFACE_INFO */
	OUT_RING(ring, A2XX_RB_COLOR_INFO_SWAP(fmt2swap(format)) |
			A2XX_RB_COLOR_INFO_FORMAT(fd2_pipe2color(format)));
	reg = A2XX_RB_DEPTH_INFO_DEPTH_BASE(align(gmem->bin_w * gmem->bin_h, 4));
	if (pfb->zsbuf)
		reg |= A2XX_RB_DEPTH_INFO_DEPTH_FORMAT(fd_pipe2depth(pfb->zsbuf->format));
	OUT_RING(ring, reg);                         /* RB_DEPTH_INFO */
}

/* before mem2gmem */
static void
fd2_emit_tile_prep(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	enum pipe_format format = pipe_surface_format(pfb->cbufs[0]);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_INFO));
	OUT_RING(ring, A2XX_RB_COLOR_INFO_SWAP(1) | /* RB_COLOR_INFO */
			A2XX_RB_COLOR_INFO_FORMAT(fd2_pipe2color(format)));

	/* setup screen scissor for current tile (same for mem2gmem): */
	OUT_PKT3(ring, CP_SET_CONSTANT, 3);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_SCREEN_SCISSOR_TL));
	OUT_RING(ring, A2XX_PA_SC_SCREEN_SCISSOR_TL_X(0) |
			A2XX_PA_SC_SCREEN_SCISSOR_TL_Y(0));
	OUT_RING(ring, A2XX_PA_SC_SCREEN_SCISSOR_BR_X(tile->bin_w) |
			A2XX_PA_SC_SCREEN_SCISSOR_BR_Y(tile->bin_h));
}

/* before IB to rendering cmds: */
static void
fd2_emit_tile_renderprep(struct fd_context *ctx, struct fd_tile *tile)
{
	struct fd_ringbuffer *ring = ctx->ring;
	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
	enum pipe_format format = pipe_surface_format(pfb->cbufs[0]);

	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_INFO));
	OUT_RING(ring, A2XX_RB_COLOR_INFO_SWAP(fmt2swap(format)) |
			A2XX_RB_COLOR_INFO_FORMAT(fd2_pipe2color(format)));

	/* setup window scissor and offset for current tile (different
	 * from mem2gmem):
	 */
	OUT_PKT3(ring, CP_SET_CONSTANT, 2);
	OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_WINDOW_OFFSET));
	OUT_RING(ring, A2XX_PA_SC_WINDOW_OFFSET_X(-tile->xoff) |
			A2XX_PA_SC_WINDOW_OFFSET_Y(-tile->yoff));
}

void
fd2_gmem_init(struct pipe_context *pctx)
{
	struct fd_context *ctx = fd_context(pctx);

	ctx->emit_tile_init = fd2_emit_tile_init;
	ctx->emit_tile_prep = fd2_emit_tile_prep;
	ctx->emit_tile_mem2gmem = fd2_emit_tile_mem2gmem;
	ctx->emit_tile_renderprep = fd2_emit_tile_renderprep;
	ctx->emit_tile_gmem2mem = fd2_emit_tile_gmem2mem;
}