/*
 * Copyright (C) 2016 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/format/u_format.h"
#include "util/u_inlines.h"
#include "util/u_memory.h"
#include "util/u_string.h"

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

#include "fd5_context.h"
#include "fd5_draw.h"
#include "fd5_emit.h"
#include "fd5_format.h"
#include "fd5_gmem.h"
#include "fd5_program.h"
#include "fd5_zsa.h"

static void
emit_mrt(struct fd_ringbuffer *ring, unsigned nr_bufs,
         struct pipe_surface **bufs, const struct fd_gmem_stateobj *gmem)
{
   enum a5xx_tile_mode tile_mode;
   unsigned i;

   for (i = 0; i < A5XX_MAX_RENDER_TARGETS; i++) {
      enum a5xx_color_fmt format = 0;
      enum a3xx_color_swap swap = WZYX;
      bool srgb = false, sint = false, uint = false;
      struct fd_resource *rsc = NULL;
      struct fdl_slice *slice = NULL;
      uint32_t stride = 0;
      uint32_t size = 0;
      uint32_t base = 0;
      uint32_t offset = 0;

      if (gmem) {
         tile_mode = TILE5_2;
      } else {
         tile_mode = TILE5_LINEAR;
      }

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

         rsc = fd_resource(psurf->texture);

         slice = fd_resource_slice(rsc, psurf->u.tex.level);
         format = fd5_pipe2color(pformat);
         swap = fd5_pipe2swap(pformat);
         srgb = util_format_is_srgb(pformat);
         sint = util_format_is_pure_sint(pformat);
         uint = util_format_is_pure_uint(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 (gmem) {
            stride = gmem->bin_w * gmem->cbuf_cpp[i];
            size = stride * gmem->bin_h;
            base = gmem->cbuf_base[i];
         } else {
            stride = fd_resource_pitch(rsc, psurf->u.tex.level);
            size = slice->size0;

            tile_mode =
               fd_resource_tile_mode(psurf->texture, psurf->u.tex.level);
         }
      }

      OUT_PKT4(ring, REG_A5XX_RB_MRT_BUF_INFO(i), 5);
      OUT_RING(
         ring,
         A5XX_RB_MRT_BUF_INFO_COLOR_FORMAT(format) |
            A5XX_RB_MRT_BUF_INFO_COLOR_TILE_MODE(tile_mode) |
            A5XX_RB_MRT_BUF_INFO_COLOR_SWAP(swap) |
            COND(gmem,
                 0x800) | /* XXX 0x1000 for RECTLIST clear, 0x0 for BLIT.. */
            COND(srgb, A5XX_RB_MRT_BUF_INFO_COLOR_SRGB));
      OUT_RING(ring, A5XX_RB_MRT_PITCH(stride));
      OUT_RING(ring, A5XX_RB_MRT_ARRAY_PITCH(size));
      if (gmem || (i >= nr_bufs) || !bufs[i]) {
         OUT_RING(ring, base);       /* RB_MRT[i].BASE_LO */
         OUT_RING(ring, 0x00000000); /* RB_MRT[i].BASE_HI */
      } else {
         debug_assert((offset + size) <= fd_bo_size(rsc->bo));
         OUT_RELOC(ring, rsc->bo, offset, 0, 0); /* BASE_LO/HI */
      }

      OUT_PKT4(ring, REG_A5XX_SP_FS_MRT_REG(i), 1);
      OUT_RING(ring, A5XX_SP_FS_MRT_REG_COLOR_FORMAT(format) |
                        COND(sint, A5XX_SP_FS_MRT_REG_COLOR_SINT) |
                        COND(uint, A5XX_SP_FS_MRT_REG_COLOR_UINT) |
                        COND(srgb, A5XX_SP_FS_MRT_REG_COLOR_SRGB));

      /* when we support UBWC, these would be the system memory
       * addr/pitch/etc:
       */
      OUT_PKT4(ring, REG_A5XX_RB_MRT_FLAG_BUFFER(i), 4);
      OUT_RING(ring, 0x00000000); /* RB_MRT_FLAG_BUFFER[i].ADDR_LO */
      OUT_RING(ring, 0x00000000); /* RB_MRT_FLAG_BUFFER[i].ADDR_HI */
      OUT_RING(ring, A5XX_RB_MRT_FLAG_BUFFER_PITCH(0));
      OUT_RING(ring, A5XX_RB_MRT_FLAG_BUFFER_ARRAY_PITCH(0));
   }
}

static void
emit_zs(struct fd_ringbuffer *ring, struct pipe_surface *zsbuf,
        const struct fd_gmem_stateobj *gmem)
{
   if (zsbuf) {
      struct fd_resource *rsc = fd_resource(zsbuf->texture);
      enum a5xx_depth_format fmt = fd5_pipe2depth(zsbuf->format);
      uint32_t cpp = rsc->layout.cpp;
      uint32_t stride = 0;
      uint32_t size = 0;

      if (gmem) {
         stride = cpp * gmem->bin_w;
         size = stride * gmem->bin_h;
      } else {
         stride = fd_resource_pitch(rsc, 0);
         size = fd_resource_slice(rsc, 0)->size0;
      }

      OUT_PKT4(ring, REG_A5XX_RB_DEPTH_BUFFER_INFO, 5);
      OUT_RING(ring, A5XX_RB_DEPTH_BUFFER_INFO_DEPTH_FORMAT(fmt));
      if (gmem) {
         OUT_RING(ring, gmem->zsbuf_base[0]); /* RB_DEPTH_BUFFER_BASE_LO */
         OUT_RING(ring, 0x00000000);          /* RB_DEPTH_BUFFER_BASE_HI */
      } else {
         OUT_RELOC(ring, rsc->bo, 0, 0, 0); /* RB_DEPTH_BUFFER_BASE_LO/HI */
      }
      OUT_RING(ring, A5XX_RB_DEPTH_BUFFER_PITCH(stride));
      OUT_RING(ring, A5XX_RB_DEPTH_BUFFER_ARRAY_PITCH(size));

      OUT_PKT4(ring, REG_A5XX_GRAS_SU_DEPTH_BUFFER_INFO, 1);
      OUT_RING(ring, A5XX_GRAS_SU_DEPTH_BUFFER_INFO_DEPTH_FORMAT(fmt));

      OUT_PKT4(ring, REG_A5XX_RB_DEPTH_FLAG_BUFFER_BASE_LO, 3);
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_FLAG_BUFFER_BASE_LO */
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_FLAG_BUFFER_BASE_HI */
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_FLAG_BUFFER_PITCH */

      if (rsc->lrz) {
         OUT_PKT4(ring, REG_A5XX_GRAS_LRZ_BUFFER_BASE_LO, 3);
         OUT_RELOC(ring, rsc->lrz, 0x1000, 0, 0);
         OUT_RING(ring, A5XX_GRAS_LRZ_BUFFER_PITCH(rsc->lrz_pitch));

         OUT_PKT4(ring, REG_A5XX_GRAS_LRZ_FAST_CLEAR_BUFFER_BASE_LO, 2);
         OUT_RELOC(ring, rsc->lrz, 0, 0, 0);
      } else {
         OUT_PKT4(ring, REG_A5XX_GRAS_LRZ_BUFFER_BASE_LO, 3);
         OUT_RING(ring, 0x00000000);
         OUT_RING(ring, 0x00000000);
         OUT_RING(ring, 0x00000000); /* GRAS_LRZ_BUFFER_PITCH */

         OUT_PKT4(ring, REG_A5XX_GRAS_LRZ_FAST_CLEAR_BUFFER_BASE_LO, 2);
         OUT_RING(ring, 0x00000000);
         OUT_RING(ring, 0x00000000);
      }

      if (rsc->stencil) {
         if (gmem) {
            stride = 1 * gmem->bin_w;
            size = stride * gmem->bin_h;
         } else {
            stride = fd_resource_pitch(rsc->stencil, 0);
            size = fd_resource_slice(rsc->stencil, 0)->size0;
         }

         OUT_PKT4(ring, REG_A5XX_RB_STENCIL_INFO, 5);
         OUT_RING(ring, A5XX_RB_STENCIL_INFO_SEPARATE_STENCIL);
         if (gmem) {
            OUT_RING(ring, gmem->zsbuf_base[1]); /* RB_STENCIL_BASE_LO */
            OUT_RING(ring, 0x00000000);          /* RB_STENCIL_BASE_HI */
         } else {
            OUT_RELOC(ring, rsc->stencil->bo, 0, 0,
                      0); /* RB_STENCIL_BASE_LO/HI */
         }
         OUT_RING(ring, A5XX_RB_STENCIL_PITCH(stride));
         OUT_RING(ring, A5XX_RB_STENCIL_ARRAY_PITCH(size));
      } else {
         OUT_PKT4(ring, REG_A5XX_RB_STENCIL_INFO, 1);
         OUT_RING(ring, 0x00000000); /* RB_STENCIL_INFO */
      }
   } else {
      OUT_PKT4(ring, REG_A5XX_RB_DEPTH_BUFFER_INFO, 5);
      OUT_RING(ring, A5XX_RB_DEPTH_BUFFER_INFO_DEPTH_FORMAT(DEPTH5_NONE));
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_BUFFER_BASE_LO */
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_BUFFER_BASE_HI */
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_BUFFER_PITCH */
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_BUFFER_ARRAY_PITCH */

      OUT_PKT4(ring, REG_A5XX_GRAS_SU_DEPTH_BUFFER_INFO, 1);
      OUT_RING(ring, A5XX_GRAS_SU_DEPTH_BUFFER_INFO_DEPTH_FORMAT(DEPTH5_NONE));

      OUT_PKT4(ring, REG_A5XX_RB_DEPTH_FLAG_BUFFER_BASE_LO, 3);
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_FLAG_BUFFER_BASE_LO */
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_FLAG_BUFFER_BASE_HI */
      OUT_RING(ring, 0x00000000); /* RB_DEPTH_FLAG_BUFFER_PITCH */

      OUT_PKT4(ring, REG_A5XX_RB_STENCIL_INFO, 1);
      OUT_RING(ring, 0x00000000); /* RB_STENCIL_INFO */
   }
}

static bool
use_hw_binning(struct fd_batch *batch)
{
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;

   if ((gmem->maxpw * gmem->maxph) > 32)
      return false;

   if ((gmem->maxpw > 15) || (gmem->maxph > 15))
      return false;

   return fd_binning_enabled && ((gmem->nbins_x * gmem->nbins_y) > 2) &&
          (batch->num_draws > 0);
}

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

static void
update_vsc_pipe(struct fd_batch *batch) assert_dt
{
   struct fd_context *ctx = batch->ctx;
   struct fd5_context *fd5_ctx = fd5_context(ctx);
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;
   struct fd_ringbuffer *ring = batch->gmem;
   int i;

   OUT_PKT4(ring, REG_A5XX_VSC_BIN_SIZE, 3);
   OUT_RING(ring, A5XX_VSC_BIN_SIZE_WIDTH(gmem->bin_w) |
                     A5XX_VSC_BIN_SIZE_HEIGHT(gmem->bin_h));
   OUT_RELOC(ring, fd5_ctx->vsc_size_mem, 0, 0, 0); /* VSC_SIZE_ADDRESS_LO/HI */

   OUT_PKT4(ring, REG_A5XX_UNKNOWN_0BC5, 2);
   OUT_RING(ring, 0x00000000); /* UNKNOWN_0BC5 */
   OUT_RING(ring, 0x00000000); /* UNKNOWN_0BC6 */

   OUT_PKT4(ring, REG_A5XX_VSC_PIPE_CONFIG_REG(0), 16);
   for (i = 0; i < 16; i++) {
      const struct fd_vsc_pipe *pipe = &gmem->vsc_pipe[i];
      OUT_RING(ring, A5XX_VSC_PIPE_CONFIG_REG_X(pipe->x) |
                        A5XX_VSC_PIPE_CONFIG_REG_Y(pipe->y) |
                        A5XX_VSC_PIPE_CONFIG_REG_W(pipe->w) |
                        A5XX_VSC_PIPE_CONFIG_REG_H(pipe->h));
   }

   OUT_PKT4(ring, REG_A5XX_VSC_PIPE_DATA_ADDRESS_LO(0), 32);
   for (i = 0; i < 16; i++) {
      if (!ctx->vsc_pipe_bo[i]) {
         ctx->vsc_pipe_bo[i] = fd_bo_new(
            ctx->dev, 0x20000, DRM_FREEDRENO_GEM_TYPE_KMEM, "vsc_pipe[%u]", i);
      }
      OUT_RELOC(ring, ctx->vsc_pipe_bo[i], 0, 0,
                0); /* VSC_PIPE_DATA_ADDRESS[i].LO/HI */
   }

   OUT_PKT4(ring, REG_A5XX_VSC_PIPE_DATA_LENGTH_REG(0), 16);
   for (i = 0; i < 16; i++) {
      OUT_RING(ring, fd_bo_size(ctx->vsc_pipe_bo[i]) -
                        32); /* VSC_PIPE_DATA_LENGTH[i] */
   }
}

static void
emit_binning_pass(struct fd_batch *batch) assert_dt
{
   struct fd_ringbuffer *ring = batch->gmem;
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;

   uint32_t x1 = gmem->minx;
   uint32_t y1 = gmem->miny;
   uint32_t x2 = gmem->minx + gmem->width - 1;
   uint32_t y2 = gmem->miny + gmem->height - 1;

   fd5_set_render_mode(batch->ctx, ring, BINNING);

   OUT_PKT4(ring, REG_A5XX_RB_CNTL, 1);
   OUT_RING(ring,
            A5XX_RB_CNTL_WIDTH(gmem->bin_w) | A5XX_RB_CNTL_HEIGHT(gmem->bin_h));

   OUT_PKT4(ring, REG_A5XX_GRAS_SC_WINDOW_SCISSOR_TL, 2);
   OUT_RING(ring, A5XX_GRAS_SC_WINDOW_SCISSOR_TL_X(x1) |
                     A5XX_GRAS_SC_WINDOW_SCISSOR_TL_Y(y1));
   OUT_RING(ring, A5XX_GRAS_SC_WINDOW_SCISSOR_BR_X(x2) |
                     A5XX_GRAS_SC_WINDOW_SCISSOR_BR_Y(y2));

   OUT_PKT4(ring, REG_A5XX_RB_RESOLVE_CNTL_1, 2);
   OUT_RING(ring, A5XX_RB_RESOLVE_CNTL_1_X(x1) | A5XX_RB_RESOLVE_CNTL_1_Y(y1));
   OUT_RING(ring, A5XX_RB_RESOLVE_CNTL_2_X(x2) | A5XX_RB_RESOLVE_CNTL_2_Y(y2));

   update_vsc_pipe(batch);

   OUT_PKT4(ring, REG_A5XX_VPC_MODE_CNTL, 1);
   OUT_RING(ring, A5XX_VPC_MODE_CNTL_BINNING_PASS);

   fd5_event_write(batch, ring, UNK_2C, false);

   OUT_PKT4(ring, REG_A5XX_RB_WINDOW_OFFSET, 1);
   OUT_RING(ring, A5XX_RB_WINDOW_OFFSET_X(0) | A5XX_RB_WINDOW_OFFSET_Y(0));

   /* emit IB to binning drawcmds: */
   fd5_emit_ib(ring, batch->binning);

   fd_reset_wfi(batch);

   fd5_event_write(batch, ring, UNK_2D, false);

   fd5_event_write(batch, ring, CACHE_FLUSH_TS, true);

   // TODO CP_COND_WRITE's for all the vsc buffers (check for overflow??)

   fd_wfi(batch, ring);

   OUT_PKT4(ring, REG_A5XX_VPC_MODE_CNTL, 1);
   OUT_RING(ring, 0x0);
}

/* before first tile */
static void
fd5_emit_tile_init(struct fd_batch *batch) assert_dt
{
   struct fd_ringbuffer *ring = batch->gmem;
   struct pipe_framebuffer_state *pfb = &batch->framebuffer;

   fd5_emit_restore(batch, ring);

   if (batch->prologue)
      fd5_emit_ib(ring, batch->prologue);

   fd5_emit_lrz_flush(batch, ring);

   OUT_PKT4(ring, REG_A5XX_GRAS_CL_CNTL, 1);
   OUT_RING(ring, 0x00000080); /* GRAS_CL_CNTL */

   OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
   OUT_RING(ring, 0x0);

   OUT_PKT4(ring, REG_A5XX_PC_POWER_CNTL, 1);
   OUT_RING(ring, 0x00000003); /* PC_POWER_CNTL */

   OUT_PKT4(ring, REG_A5XX_VFD_POWER_CNTL, 1);
   OUT_RING(ring, 0x00000003); /* VFD_POWER_CNTL */

   /* 0x10000000 for BYPASS.. 0x7c13c080 for GMEM: */
   fd_wfi(batch, ring);
   OUT_PKT4(ring, REG_A5XX_RB_CCU_CNTL, 1);
   OUT_RING(ring, 0x7c13c080); /* RB_CCU_CNTL */

   emit_zs(ring, pfb->zsbuf, batch->gmem_state);
   emit_mrt(ring, pfb->nr_cbufs, pfb->cbufs, batch->gmem_state);

   /* Enable stream output for the first pass (likely the binning). */
   OUT_PKT4(ring, REG_A5XX_VPC_SO_OVERRIDE, 1);
   OUT_RING(ring, 0);

   if (use_hw_binning(batch)) {
      emit_binning_pass(batch);

      /* Disable stream output after binning, since each VS output should get
       * streamed out once.
       */
      OUT_PKT4(ring, REG_A5XX_VPC_SO_OVERRIDE, 1);
      OUT_RING(ring, A5XX_VPC_SO_OVERRIDE_SO_DISABLE);

      fd5_emit_lrz_flush(batch, ring);
      patch_draws(batch, USE_VISIBILITY);
   } else {
      patch_draws(batch, IGNORE_VISIBILITY);
   }

   fd5_set_render_mode(batch->ctx, ring, GMEM);

   /* XXX If we're in gmem mode but not doing HW binning, then after the first
    * tile we should disable stream output (fd6_gmem.c doesn't do that either).
    */
}

/* before mem2gmem */
static void
fd5_emit_tile_prep(struct fd_batch *batch, const struct fd_tile *tile) assert_dt
{
   struct fd_context *ctx = batch->ctx;
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;
   struct fd5_context *fd5_ctx = fd5_context(ctx);
   struct fd_ringbuffer *ring = batch->gmem;

   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_PKT4(ring, REG_A5XX_GRAS_SC_WINDOW_SCISSOR_TL, 2);
   OUT_RING(ring, A5XX_GRAS_SC_WINDOW_SCISSOR_TL_X(x1) |
                     A5XX_GRAS_SC_WINDOW_SCISSOR_TL_Y(y1));
   OUT_RING(ring, A5XX_GRAS_SC_WINDOW_SCISSOR_BR_X(x2) |
                     A5XX_GRAS_SC_WINDOW_SCISSOR_BR_Y(y2));

   OUT_PKT4(ring, REG_A5XX_RB_RESOLVE_CNTL_1, 2);
   OUT_RING(ring, A5XX_RB_RESOLVE_CNTL_1_X(x1) | A5XX_RB_RESOLVE_CNTL_1_Y(y1));
   OUT_RING(ring, A5XX_RB_RESOLVE_CNTL_2_X(x2) | A5XX_RB_RESOLVE_CNTL_2_Y(y2));

   if (use_hw_binning(batch)) {
      const struct fd_vsc_pipe *pipe = &gmem->vsc_pipe[tile->p];
      struct fd_bo *pipe_bo = ctx->vsc_pipe_bo[tile->p];

      OUT_PKT7(ring, CP_WAIT_FOR_ME, 0);

      OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
      OUT_RING(ring, 0x0);

      OUT_PKT7(ring, CP_SET_BIN_DATA5, 5);
      OUT_RING(ring, CP_SET_BIN_DATA5_0_VSC_SIZE(pipe->w * pipe->h) |
                        CP_SET_BIN_DATA5_0_VSC_N(tile->n));
      OUT_RELOC(ring, pipe_bo, 0, 0, 0);     /* VSC_PIPE[p].DATA_ADDRESS */
      OUT_RELOC(ring, fd5_ctx->vsc_size_mem, /* VSC_SIZE_ADDRESS + (p * 4) */
                (tile->p * 4), 0, 0);
   } else {
      OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
      OUT_RING(ring, 0x1);
   }

   OUT_PKT4(ring, REG_A5XX_RB_WINDOW_OFFSET, 1);
   OUT_RING(ring, A5XX_RB_WINDOW_OFFSET_X(x1) | A5XX_RB_WINDOW_OFFSET_Y(y1));
}

/*
 * transfer from system memory to gmem
 */

static void
emit_mem2gmem_surf(struct fd_batch *batch, uint32_t base,
                   struct pipe_surface *psurf, enum a5xx_blit_buf buf)
{
   struct fd_ringbuffer *ring = batch->gmem;
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;
   struct fd_resource *rsc = fd_resource(psurf->texture);
   uint32_t stride, size;

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

   if (buf == BLIT_S)
      rsc = rsc->stencil;

   if ((buf == BLIT_ZS) || (buf == BLIT_S)) {
      // XXX hack import via BLIT_MRT0 instead of BLIT_ZS, since I don't
      // know otherwise how to go from linear in sysmem to tiled in gmem.
      // possibly we want to flip this around gmem2mem and keep depth
      // tiled in sysmem (and fixup sampler state to assume tiled).. this
      // might be required for doing depth/stencil in bypass mode?
      struct fdl_slice *slice = fd_resource_slice(rsc, 0);
      enum a5xx_color_fmt format =
         fd5_pipe2color(fd_gmem_restore_format(rsc->b.b.format));

      OUT_PKT4(ring, REG_A5XX_RB_MRT_BUF_INFO(0), 5);
      OUT_RING(ring,
               A5XX_RB_MRT_BUF_INFO_COLOR_FORMAT(format) |
                  A5XX_RB_MRT_BUF_INFO_COLOR_TILE_MODE(rsc->layout.tile_mode) |
                  A5XX_RB_MRT_BUF_INFO_COLOR_SWAP(WZYX));
      OUT_RING(ring, A5XX_RB_MRT_PITCH(fd_resource_pitch(rsc, 0)));
      OUT_RING(ring, A5XX_RB_MRT_ARRAY_PITCH(slice->size0));
      OUT_RELOC(ring, rsc->bo, 0, 0, 0); /* BASE_LO/HI */

      buf = BLIT_MRT0;
   }

   stride = gmem->bin_w << fdl_cpp_shift(&rsc->layout);
   size = stride * gmem->bin_h;

   OUT_PKT4(ring, REG_A5XX_RB_BLIT_FLAG_DST_LO, 4);
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_LO */
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_HI */
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_PITCH */
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_ARRAY_PITCH */

   OUT_PKT4(ring, REG_A5XX_RB_RESOLVE_CNTL_3, 5);
   OUT_RING(ring, 0x00000000); /* RB_RESOLVE_CNTL_3 */
   OUT_RING(ring, base);       /* RB_BLIT_DST_LO */
   OUT_RING(ring, 0x00000000); /* RB_BLIT_DST_HI */
   OUT_RING(ring, A5XX_RB_BLIT_DST_PITCH(stride));
   OUT_RING(ring, A5XX_RB_BLIT_DST_ARRAY_PITCH(size));

   OUT_PKT4(ring, REG_A5XX_RB_BLIT_CNTL, 1);
   OUT_RING(ring, A5XX_RB_BLIT_CNTL_BUF(buf));

   fd5_emit_blit(batch, ring);
}

static void
fd5_emit_tile_mem2gmem(struct fd_batch *batch, const struct fd_tile *tile)
{
   struct fd_ringbuffer *ring = batch->gmem;
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;
   struct pipe_framebuffer_state *pfb = &batch->framebuffer;

   /*
    * setup mrt and zs with system memory base addresses:
    */

   emit_mrt(ring, pfb->nr_cbufs, pfb->cbufs, NULL);
   //	emit_zs(ring, pfb->zsbuf, NULL);

   OUT_PKT4(ring, REG_A5XX_RB_CNTL, 1);
   OUT_RING(ring, A5XX_RB_CNTL_WIDTH(gmem->bin_w) |
                     A5XX_RB_CNTL_HEIGHT(gmem->bin_h) | A5XX_RB_CNTL_BYPASS);

   if (fd_gmem_needs_restore(batch, tile, FD_BUFFER_COLOR)) {
      unsigned i;
      for (i = 0; i < pfb->nr_cbufs; i++) {
         if (!pfb->cbufs[i])
            continue;
         if (!(batch->restore & (PIPE_CLEAR_COLOR0 << i)))
            continue;
         emit_mem2gmem_surf(batch, gmem->cbuf_base[i], pfb->cbufs[i],
                            BLIT_MRT0 + i);
      }
   }

   if (fd_gmem_needs_restore(batch, tile,
                             FD_BUFFER_DEPTH | FD_BUFFER_STENCIL)) {
      struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);

      if (!rsc->stencil || fd_gmem_needs_restore(batch, tile, FD_BUFFER_DEPTH))
         emit_mem2gmem_surf(batch, gmem->zsbuf_base[0], pfb->zsbuf, BLIT_ZS);
      if (rsc->stencil && fd_gmem_needs_restore(batch, tile, FD_BUFFER_STENCIL))
         emit_mem2gmem_surf(batch, gmem->zsbuf_base[1], pfb->zsbuf, BLIT_S);
   }
}

/* before IB to rendering cmds: */
static void
fd5_emit_tile_renderprep(struct fd_batch *batch, const struct fd_tile *tile)
{
   struct fd_ringbuffer *ring = batch->gmem;
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;
   struct pipe_framebuffer_state *pfb = &batch->framebuffer;

   OUT_PKT4(ring, REG_A5XX_RB_CNTL, 1);
   OUT_RING(ring,
            A5XX_RB_CNTL_WIDTH(gmem->bin_w) | A5XX_RB_CNTL_HEIGHT(gmem->bin_h));

   emit_zs(ring, pfb->zsbuf, gmem);
   emit_mrt(ring, pfb->nr_cbufs, pfb->cbufs, gmem);

   enum a3xx_msaa_samples samples = fd_msaa_samples(pfb->samples);

   OUT_PKT4(ring, REG_A5XX_TPL1_TP_RAS_MSAA_CNTL, 2);
   OUT_RING(ring, A5XX_TPL1_TP_RAS_MSAA_CNTL_SAMPLES(samples));
   OUT_RING(ring, A5XX_TPL1_TP_DEST_MSAA_CNTL_SAMPLES(samples) |
                     COND(samples == MSAA_ONE,
                          A5XX_TPL1_TP_DEST_MSAA_CNTL_MSAA_DISABLE));

   OUT_PKT4(ring, REG_A5XX_RB_RAS_MSAA_CNTL, 2);
   OUT_RING(ring, A5XX_RB_RAS_MSAA_CNTL_SAMPLES(samples));
   OUT_RING(ring,
            A5XX_RB_DEST_MSAA_CNTL_SAMPLES(samples) |
               COND(samples == MSAA_ONE, A5XX_RB_DEST_MSAA_CNTL_MSAA_DISABLE));

   OUT_PKT4(ring, REG_A5XX_GRAS_SC_RAS_MSAA_CNTL, 2);
   OUT_RING(ring, A5XX_GRAS_SC_RAS_MSAA_CNTL_SAMPLES(samples));
   OUT_RING(ring, A5XX_GRAS_SC_DEST_MSAA_CNTL_SAMPLES(samples) |
                     COND(samples == MSAA_ONE,
                          A5XX_GRAS_SC_DEST_MSAA_CNTL_MSAA_DISABLE));
}

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

static void
emit_gmem2mem_surf(struct fd_batch *batch, uint32_t base,
                   struct pipe_surface *psurf, enum a5xx_blit_buf buf)
{
   struct fd_ringbuffer *ring = batch->gmem;
   struct fd_resource *rsc = fd_resource(psurf->texture);
   struct fdl_slice *slice;
   bool tiled;
   uint32_t offset, pitch;

   if (!rsc->valid)
      return;

   if (buf == BLIT_S)
      rsc = rsc->stencil;

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

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

   OUT_PKT4(ring, REG_A5XX_RB_BLIT_FLAG_DST_LO, 4);
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_LO */
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_HI */
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_PITCH */
   OUT_RING(ring, 0x00000000); /* RB_BLIT_FLAG_DST_ARRAY_PITCH */

   tiled = fd_resource_tile_mode(psurf->texture, psurf->u.tex.level);

   OUT_PKT4(ring, REG_A5XX_RB_RESOLVE_CNTL_3, 5);
   OUT_RING(ring, 0x00000004 | /* XXX RB_RESOLVE_CNTL_3 */
                     COND(tiled, A5XX_RB_RESOLVE_CNTL_3_TILED));
   OUT_RELOC(ring, rsc->bo, offset, 0, 0); /* RB_BLIT_DST_LO/HI */
   OUT_RING(ring, A5XX_RB_BLIT_DST_PITCH(pitch));
   OUT_RING(ring, A5XX_RB_BLIT_DST_ARRAY_PITCH(slice->size0));

   OUT_PKT4(ring, REG_A5XX_RB_BLIT_CNTL, 1);
   OUT_RING(ring, A5XX_RB_BLIT_CNTL_BUF(buf));

   //	bool msaa_resolve = pfb->samples > 1;
   bool msaa_resolve = false;
   OUT_PKT4(ring, REG_A5XX_RB_CLEAR_CNTL, 1);
   OUT_RING(ring, COND(msaa_resolve, A5XX_RB_CLEAR_CNTL_MSAA_RESOLVE));

   fd5_emit_blit(batch, ring);
}

static void
fd5_emit_tile_gmem2mem(struct fd_batch *batch, const struct fd_tile *tile)
{
   const struct fd_gmem_stateobj *gmem = batch->gmem_state;
   struct pipe_framebuffer_state *pfb = &batch->framebuffer;

   if (batch->resolve & (FD_BUFFER_DEPTH | FD_BUFFER_STENCIL)) {
      struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);

      if (!rsc->stencil || (batch->resolve & FD_BUFFER_DEPTH))
         emit_gmem2mem_surf(batch, gmem->zsbuf_base[0], pfb->zsbuf, BLIT_ZS);
      if (rsc->stencil && (batch->resolve & FD_BUFFER_STENCIL))
         emit_gmem2mem_surf(batch, gmem->zsbuf_base[1], pfb->zsbuf, BLIT_S);
   }

   if (batch->resolve & FD_BUFFER_COLOR) {
      unsigned i;
      for (i = 0; i < pfb->nr_cbufs; i++) {
         if (!pfb->cbufs[i])
            continue;
         if (!(batch->resolve & (PIPE_CLEAR_COLOR0 << i)))
            continue;
         emit_gmem2mem_surf(batch, gmem->cbuf_base[i], pfb->cbufs[i],
                            BLIT_MRT0 + i);
      }
   }
}

static void
fd5_emit_tile_fini(struct fd_batch *batch) assert_dt
{
   struct fd_ringbuffer *ring = batch->gmem;

   OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
   OUT_RING(ring, 0x0);

   fd5_emit_lrz_flush(batch, ring);

   fd5_cache_flush(batch, ring);
   fd5_set_render_mode(batch->ctx, ring, BYPASS);
}

static void
fd5_emit_sysmem_prep(struct fd_batch *batch) assert_dt
{
   struct fd_ringbuffer *ring = batch->gmem;

   fd5_emit_restore(batch, ring);

   fd5_emit_lrz_flush(batch, ring);

   if (batch->prologue)
      fd5_emit_ib(ring, batch->prologue);

   OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
   OUT_RING(ring, 0x0);

   fd5_event_write(batch, ring, PC_CCU_INVALIDATE_COLOR, false);

   OUT_PKT4(ring, REG_A5XX_PC_POWER_CNTL, 1);
   OUT_RING(ring, 0x00000003); /* PC_POWER_CNTL */

   OUT_PKT4(ring, REG_A5XX_VFD_POWER_CNTL, 1);
   OUT_RING(ring, 0x00000003); /* VFD_POWER_CNTL */

   /* 0x10000000 for BYPASS.. 0x7c13c080 for GMEM: */
   fd_wfi(batch, ring);
   OUT_PKT4(ring, REG_A5XX_RB_CCU_CNTL, 1);
   OUT_RING(ring, 0x10000000); /* RB_CCU_CNTL */

   OUT_PKT4(ring, REG_A5XX_RB_CNTL, 1);
   OUT_RING(ring, A5XX_RB_CNTL_WIDTH(0) | A5XX_RB_CNTL_HEIGHT(0) |
                     A5XX_RB_CNTL_BYPASS);

   /* remaining setup below here does not apply to blit/compute: */
   if (batch->nondraw)
      return;

   struct pipe_framebuffer_state *pfb = &batch->framebuffer;

   OUT_PKT4(ring, REG_A5XX_GRAS_SC_WINDOW_SCISSOR_TL, 2);
   OUT_RING(ring, A5XX_GRAS_SC_WINDOW_SCISSOR_TL_X(0) |
                     A5XX_GRAS_SC_WINDOW_SCISSOR_TL_Y(0));
   OUT_RING(ring, A5XX_GRAS_SC_WINDOW_SCISSOR_BR_X(pfb->width - 1) |
                     A5XX_GRAS_SC_WINDOW_SCISSOR_BR_Y(pfb->height - 1));

   OUT_PKT4(ring, REG_A5XX_RB_RESOLVE_CNTL_1, 2);
   OUT_RING(ring, A5XX_RB_RESOLVE_CNTL_1_X(0) | A5XX_RB_RESOLVE_CNTL_1_Y(0));
   OUT_RING(ring, A5XX_RB_RESOLVE_CNTL_2_X(pfb->width - 1) |
                     A5XX_RB_RESOLVE_CNTL_2_Y(pfb->height - 1));

   OUT_PKT4(ring, REG_A5XX_RB_WINDOW_OFFSET, 1);
   OUT_RING(ring, A5XX_RB_WINDOW_OFFSET_X(0) | A5XX_RB_WINDOW_OFFSET_Y(0));

   /* Enable stream output, since there's no binning pass to put it in. */
   OUT_PKT4(ring, REG_A5XX_VPC_SO_OVERRIDE, 1);
   OUT_RING(ring, 0);

   OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
   OUT_RING(ring, 0x1);

   patch_draws(batch, IGNORE_VISIBILITY);

   emit_zs(ring, pfb->zsbuf, NULL);
   emit_mrt(ring, pfb->nr_cbufs, pfb->cbufs, NULL);

   OUT_PKT4(ring, REG_A5XX_TPL1_TP_RAS_MSAA_CNTL, 2);
   OUT_RING(ring, A5XX_TPL1_TP_RAS_MSAA_CNTL_SAMPLES(MSAA_ONE));
   OUT_RING(ring, A5XX_TPL1_TP_DEST_MSAA_CNTL_SAMPLES(MSAA_ONE) |
                     A5XX_TPL1_TP_DEST_MSAA_CNTL_MSAA_DISABLE);

   OUT_PKT4(ring, REG_A5XX_RB_RAS_MSAA_CNTL, 2);
   OUT_RING(ring, A5XX_RB_RAS_MSAA_CNTL_SAMPLES(MSAA_ONE));
   OUT_RING(ring, A5XX_RB_DEST_MSAA_CNTL_SAMPLES(MSAA_ONE) |
                     A5XX_RB_DEST_MSAA_CNTL_MSAA_DISABLE);

   OUT_PKT4(ring, REG_A5XX_GRAS_SC_RAS_MSAA_CNTL, 2);
   OUT_RING(ring, A5XX_GRAS_SC_RAS_MSAA_CNTL_SAMPLES(MSAA_ONE));
   OUT_RING(ring, A5XX_GRAS_SC_DEST_MSAA_CNTL_SAMPLES(MSAA_ONE) |
                     A5XX_GRAS_SC_DEST_MSAA_CNTL_MSAA_DISABLE);
}

static void
fd5_emit_sysmem_fini(struct fd_batch *batch)
{
   struct fd_ringbuffer *ring = batch->gmem;

   OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
   OUT_RING(ring, 0x0);

   fd5_emit_lrz_flush(batch, ring);

   fd5_event_write(batch, ring, PC_CCU_FLUSH_COLOR_TS, true);
   fd5_event_write(batch, ring, PC_CCU_FLUSH_DEPTH_TS, true);
}

void
fd5_gmem_init(struct pipe_context *pctx) disable_thread_safety_analysis
{
   struct fd_context *ctx = fd_context(pctx);

   ctx->emit_tile_init = fd5_emit_tile_init;
   ctx->emit_tile_prep = fd5_emit_tile_prep;
   ctx->emit_tile_mem2gmem = fd5_emit_tile_mem2gmem;
   ctx->emit_tile_renderprep = fd5_emit_tile_renderprep;
   ctx->emit_tile_gmem2mem = fd5_emit_tile_gmem2mem;
   ctx->emit_tile_fini = fd5_emit_tile_fini;
   ctx->emit_sysmem_prep = fd5_emit_sysmem_prep;
   ctx->emit_sysmem_fini = fd5_emit_sysmem_fini;
}
