/*
 * Copyright © 2016 Rob Clark <robclark@freedesktop.org>
 * SPDX-License-Identifier: MIT
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */

#ifndef FD5_EMIT_H
#define FD5_EMIT_H

#include "pipe/p_context.h"

#include "fd5_context.h"
#include "fd5_format.h"
#include "fd5_program.h"
#include "fd5_screen.h"
#include "freedreno_batch.h"
#include "freedreno_context.h"
#include "ir3_gallium.h"

struct fd_ringbuffer;

/* grouped together emit-state for prog/vertex/state emit: */
struct fd5_emit {
   struct util_debug_callback *debug;
   const struct fd_vertex_state *vtx;
   const struct fd5_program_state *prog;
   const struct pipe_draw_info *info;
        unsigned drawid_offset;
   const struct pipe_draw_indirect_info *indirect;
	const struct pipe_draw_start_count_bias *draw;
   bool binning_pass;
   struct ir3_cache_key key;
   enum fd_dirty_3d_state dirty;

   uint32_t sprite_coord_enable; /* bitmask */
   bool sprite_coord_mode;
   bool rasterflat;

   /* in binning pass, we don't have real frag shader, so we
    * don't know if real draw disqualifies lrz write.  So just
    * figure that out up-front and stash it in the emit.
    */
   bool no_lrz_write;

   /* cached to avoid repeated lookups of same variants: */
   const struct ir3_shader_variant *vs, *fs;
   /* TODO: other shader stages.. */

   unsigned streamout_mask;
};

static inline enum a5xx_color_fmt
fd5_emit_format(struct pipe_surface *surf)
{
   if (!surf)
      return 0;
   return fd5_pipe2color(surf->format);
}

static inline const struct ir3_shader_variant *
fd5_emit_get_vp(struct fd5_emit *emit)
{
   if (!emit->vs) {
      /* We use nonbinning VS during binning when TFB is enabled because that
       * is what has all the outputs that might be involved in TFB.
       */
      if (emit->binning_pass &&
          !emit->prog->vs->stream_output.num_outputs)
         emit->vs = emit->prog->bs;
      else
         emit->vs = emit->prog->vs;
   }
   return emit->vs;
}

static inline const struct ir3_shader_variant *
fd5_emit_get_fp(struct fd5_emit *emit)
{
   if (!emit->fs) {
      if (emit->binning_pass) {
         /* use dummy stateobj to simplify binning vs non-binning: */
         static const struct ir3_shader_variant binning_fs = {};
         emit->fs = &binning_fs;
      } else {
         emit->fs = emit->prog->fs;
      }
   }
   return emit->fs;
}

static inline void
fd5_cache_flush(struct fd_batch *batch, struct fd_ringbuffer *ring) assert_dt
{
   fd_reset_wfi(batch);
   OUT_PKT4(ring, REG_A5XX_UCHE_CACHE_INVALIDATE_MIN, 5);
   OUT_RING(ring, 0x00000000); /* UCHE_CACHE_INVALIDATE_MIN_LO */
   OUT_RING(ring, 0x00000000); /* UCHE_CACHE_INVALIDATE_MIN_HI */
   OUT_RING(ring, 0x00000000); /* UCHE_CACHE_INVALIDATE_MAX_LO */
   OUT_RING(ring, 0x00000000); /* UCHE_CACHE_INVALIDATE_MAX_HI */
   OUT_RING(ring, 0x00000012); /* UCHE_CACHE_INVALIDATE */
   fd_wfi(batch, ring);
}

static inline void
fd5_set_render_mode(struct fd_context *ctx, struct fd_ringbuffer *ring,
                    enum render_mode_cmd mode)
{
   /* TODO add preemption support, gmem bypass, etc */
   emit_marker5(ring, 7);
   OUT_PKT7(ring, CP_SET_RENDER_MODE, 5);
   OUT_RING(ring, CP_SET_RENDER_MODE_0_MODE(mode));
   OUT_RING(ring, 0x00000000); /* ADDR_LO */
   OUT_RING(ring, 0x00000000); /* ADDR_HI */
   OUT_RING(ring, COND(mode == GMEM, CP_SET_RENDER_MODE_3_GMEM_ENABLE) |
                     COND(mode == BINNING, CP_SET_RENDER_MODE_3_VSC_ENABLE));
   OUT_RING(ring, 0x00000000);
   emit_marker5(ring, 7);
}

static inline void
fd5_event_write(struct fd_batch *batch, struct fd_ringbuffer *ring,
                enum vgt_event_type evt, bool timestamp)
{
   OUT_PKT7(ring, CP_EVENT_WRITE, timestamp ? 4 : 1);
   OUT_RING(ring, CP_EVENT_WRITE_0_EVENT(evt));
   if (timestamp) {
      OUT_RELOC(ring, fd5_context(batch->ctx)->blit_mem, 0, 0,
                0); /* ADDR_LO/HI */
      OUT_RING(ring, 0x00000000);
   }
}

static inline void
fd5_emit_blit(struct fd_batch *batch, struct fd_ringbuffer *ring)
{
   emit_marker5(ring, 7);
   fd5_event_write(batch, ring, CCU_RESOLVE, true);
   emit_marker5(ring, 7);
}

static inline void
fd5_emit_render_cntl(struct fd_context *ctx, bool blit, bool binning) assert_dt
{
   struct fd_ringbuffer *ring =
      binning ? ctx->batch->binning : ctx->batch->draw;

   /* TODO eventually this partially depends on the pfb state, ie.
    * which of the cbuf(s)/zsbuf has an UBWC flag buffer.. that part
    * we could probably cache and just regenerate if framebuffer
    * state is dirty (or something like that)..
    *
    * Other bits seem to depend on query state, like if samples-passed
    * query is active.
    */
   bool samples_passed = (ctx->occlusion_queries_active > 0);
   OUT_PKT4(ring, REG_A5XX_RB_RENDER_CNTL, 1);
   OUT_RING(ring, 0x00000000 | /* RB_RENDER_CNTL */
                     COND(binning, A5XX_RB_RENDER_CNTL_BINNING_PASS) |
                     COND(binning, A5XX_RB_RENDER_CNTL_DISABLE_COLOR_PIPE) |
                     COND(samples_passed, A5XX_RB_RENDER_CNTL_SAMPLES_PASSED) |
                     COND(!blit, 0x8));

   OUT_PKT4(ring, REG_A5XX_GRAS_SC_CNTL, 1);
   OUT_RING(ring, 0x00000008 | /* GRAS_SC_CNTL */
                     COND(binning, A5XX_GRAS_SC_CNTL_BINNING_PASS) |
                     COND(samples_passed, A5XX_GRAS_SC_CNTL_SAMPLES_PASSED));
}

static inline void
fd5_emit_lrz_flush(struct fd_batch *batch, struct fd_ringbuffer *ring)
{
   /* TODO I think the extra writes to GRAS_LRZ_CNTL are probably
    * a workaround and not needed on all a5xx.
    */
   OUT_PKT4(ring, REG_A5XX_GRAS_LRZ_CNTL, 1);
   OUT_RING(ring, A5XX_GRAS_LRZ_CNTL_ENABLE);

   fd5_event_write(batch, ring, LRZ_FLUSH_INVALIDATE, false);

   OUT_PKT4(ring, REG_A5XX_GRAS_LRZ_CNTL, 1);
   OUT_RING(ring, 0x0);
}

void fd5_emit_vertex_bufs(struct fd_ringbuffer *ring,
                          struct fd5_emit *emit) assert_dt;

void fd5_emit_state(struct fd_context *ctx, struct fd_ringbuffer *ring,
                    struct fd5_emit *emit) assert_dt;

void fd5_emit_cs_state(struct fd_context *ctx, struct fd_ringbuffer *ring,
                       struct ir3_shader_variant *cp) assert_dt;
void fd5_emit_cs_consts(const struct ir3_shader_variant *v,
                        struct fd_ringbuffer *ring, struct fd_context *ctx,
                        const struct pipe_grid_info *info) assert_dt;

void fd5_emit_restore(struct fd_batch *batch,
                      struct fd_ringbuffer *ring) assert_dt;

void fd5_emit_init_screen(struct pipe_screen *pscreen);
void fd5_emit_init(struct pipe_context *pctx);

static inline void
fd5_emit_ib(struct fd_ringbuffer *ring, struct fd_ringbuffer *target)
{
   /* for debug after a lock up, write a unique counter value
    * to scratch6 for each IB, to make it easier to match up
    * register dumps to cmdstream.  The combination of IB and
    * DRAW (scratch7) is enough to "triangulate" the particular
    * draw that caused lockup.
    */
   emit_marker5(ring, 6);
   __OUT_IB5(ring, target);
   emit_marker5(ring, 6);
}

#endif /* FD5_EMIT_H */
