src/gallium/drivers/freedreno/freedreno_draw.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "pipe/p_state.h"
  30 #include "util/u_string.h"
  31 #include "util/u_memory.h"
  32 #include "util/u_prim.h"
  33 #include "util/u_format.h"
  34
  35 #include "freedreno_draw.h"
  36 #include "freedreno_context.h"
  37 #include "freedreno_state.h"
  38 #include "freedreno_resource.h"
  39 #include "freedreno_query_hw.h"
  40 #include "freedreno_util.h"
  41
  42 static void
  43 resource_reading(struct fd_context *ctx, struct pipe_resource *prsc)
  44 {
  45         struct fd_resource *rsc;
  46
  47         if (!prsc)
  48                 return;
  49
  50         rsc = fd_resource(prsc);
  51         rsc->reading = true;
  52         list_delinit(&rsc->list);
  53         list_addtail(&rsc->list, &ctx->used_resources);
  54 }
  55
  56 static void
  57 fd_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
  58 {
  59         struct fd_context *ctx = fd_context(pctx);
  60         struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
  61         struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
  62         unsigned i, buffers = 0;
  63
  64         /* if we supported transform feedback, we'd have to disable this: */
  65         if (((scissor->maxx - scissor->minx) *
  66                         (scissor->maxy - scissor->miny)) == 0) {
  67                 return;
  68         }
  69
  70         /* emulate unsupported primitives: */
  71         if (!fd_supported_prim(ctx, info->mode)) {
  72                 util_primconvert_save_index_buffer(ctx->primconvert, &ctx->indexbuf);
  73                 util_primconvert_save_rasterizer_state(ctx->primconvert, ctx->rasterizer);
  74                 util_primconvert_draw_vbo(ctx->primconvert, info);
  75                 return;
  76         }
  77
  78         ctx->needs_flush = true;
  79
  80         /*
  81          * Figure out the buffers/features we need:
  82          */
  83
  84         if (fd_depth_enabled(ctx)) {
  85                 buffers |= FD_BUFFER_DEPTH;
  86                 fd_resource(pfb->zsbuf->texture)->dirty = true;
  87                 ctx->gmem_reason |= FD_GMEM_DEPTH_ENABLED;
  88         }
  89
  90         if (fd_stencil_enabled(ctx)) {
  91                 buffers |= FD_BUFFER_STENCIL;
  92                 fd_resource(pfb->zsbuf->texture)->dirty = true;
  93                 ctx->gmem_reason |= FD_GMEM_STENCIL_ENABLED;
  94         }
  95
  96         if (fd_logicop_enabled(ctx))
  97                 ctx->gmem_reason |= FD_GMEM_LOGICOP_ENABLED;
  98
  99         for (i = 0; i < pfb->nr_cbufs; i++) {
 100                 struct pipe_resource *surf;
 101
 102                 if (!pfb->cbufs[i])
 103                         continue;
 104
 105                 surf = pfb->cbufs[i]->texture;
 106
 107                 fd_resource(surf)->dirty = true;
 108                 buffers |= PIPE_CLEAR_COLOR0 << i;
 109
 110                 if (surf->nr_samples > 1)
 111                         ctx->gmem_reason |= FD_GMEM_MSAA_ENABLED;
 112
 113                 if (fd_blend_enabled(ctx, i))
 114                         ctx->gmem_reason |= FD_GMEM_BLEND_ENABLED;
 115         }
 116
 117         /* Skip over buffer 0, that is sent along with the command stream */
 118         for (i = 1; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
 119                 resource_reading(ctx, ctx->constbuf[PIPE_SHADER_VERTEX].cb[i].buffer);
 120                 resource_reading(ctx, ctx->constbuf[PIPE_SHADER_FRAGMENT].cb[i].buffer);
 121         }
 122
 123         /* Mark VBOs as being read */
 124         for (i = 0; i < ctx->vtx.vertexbuf.count; i++) {
 125                 assert(!ctx->vtx.vertexbuf.vb[i].user_buffer);
 126                 resource_reading(ctx, ctx->vtx.vertexbuf.vb[i].buffer);
 127         }
 128
 129         /* Mark index buffer as being read */
 130         resource_reading(ctx, ctx->indexbuf.buffer);
 131
 132         /* Mark textures as being read */
 133         for (i = 0; i < ctx->verttex.num_textures; i++)
 134                 if (ctx->verttex.textures[i])
 135                         resource_reading(ctx, ctx->verttex.textures[i]->texture);
 136         for (i = 0; i < ctx->fragtex.num_textures; i++)
 137                 if (ctx->fragtex.textures[i])
 138                         resource_reading(ctx, ctx->fragtex.textures[i]->texture);
 139
 140         ctx->num_draws++;
 141
 142         ctx->stats.draw_calls++;
 143         ctx->stats.prims_emitted +=
 144                 u_reduced_prims_for_vertices(info->mode, info->count);
 145
 146         /* any buffers that haven't been cleared yet, we need to restore: */
 147         ctx->restore |= buffers & (FD_BUFFER_ALL & ~ctx->cleared);
 148         /* and any buffers used, need to be resolved: */
 149         ctx->resolve |= buffers;
 150
 151         DBG("%x num_draws=%u (%s/%s)", buffers, ctx->num_draws,
 152                 util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 153                 util_format_short_name(pipe_surface_format(pfb->zsbuf)));
 154
 155         fd_hw_query_set_stage(ctx, ctx->ring, FD_STAGE_DRAW);
 156         ctx->draw_vbo(ctx, info);
 157
 158         /* if an app (or, well, piglit test) does many thousands of draws
 159          * without flush (or anything which implicitly flushes, like
 160          * changing render targets), we can exceed the ringbuffer size.
 161          * Since we don't currently have a sane way to wrapparound, and
 162          * we use the same buffer for both draw and tiling commands, for
 163          * now we need to do this hack and trigger flush if we are running
 164          * low on remaining space for cmds:
 165          */
 166         if (((ctx->ring->cur - ctx->ring->start) >
 167                                 (ctx->ring->size/4 - FD_TILING_COMMANDS_DWORDS)) ||
 168                         (fd_mesa_debug & FD_DBG_FLUSH))
 169                 fd_context_render(pctx);
 170 }
 171
 172 /* TODO figure out how to make better use of existing state mechanism
 173  * for clear (and possibly gmem->mem / mem->gmem) so we can (a) keep
 174  * track of what state really actually changes, and (b) reduce the code
 175  * in the a2xx/a3xx parts.
 176  */
 177
 178 static void
 179 fd_clear(struct pipe_context *pctx, unsigned buffers,
 180                 const union pipe_color_union *color, double depth, unsigned stencil)
 181 {
 182         struct fd_context *ctx = fd_context(pctx);
 183         struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
 184         struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
 185         unsigned cleared_buffers;
 186         int i;
 187
 188         /* for bookkeeping about which buffers have been cleared (and thus
 189          * can fully or partially skip mem2gmem) we need to ignore buffers
 190          * that have already had a draw, in case apps do silly things like
 191          * clear after draw (ie. if you only clear the color buffer, but
 192          * something like alpha-test causes side effects from the draw in
 193          * the depth buffer, etc)
 194          */
 195         cleared_buffers = buffers & (FD_BUFFER_ALL & ~ctx->restore);
 196
 197         /* do we have full-screen scissor? */
 198         if (!memcmp(scissor, &ctx->disabled_scissor, sizeof(*scissor))) {
 199                 ctx->cleared |= cleared_buffers;
 200         } else {
 201                 ctx->partial_cleared |= cleared_buffers;
 202                 if (cleared_buffers & PIPE_CLEAR_COLOR)
 203                         ctx->cleared_scissor.color = *scissor;
 204                 if (cleared_buffers & PIPE_CLEAR_DEPTH)
 205                         ctx->cleared_scissor.depth = *scissor;
 206                 if (cleared_buffers & PIPE_CLEAR_STENCIL)
 207                         ctx->cleared_scissor.stencil = *scissor;
 208         }
 209         ctx->resolve |= buffers;
 210         ctx->needs_flush = true;
 211
 212         if (buffers & PIPE_CLEAR_COLOR)
 213                 for (i = 0; i < pfb->nr_cbufs; i++)
 214                         if (buffers & (PIPE_CLEAR_COLOR0 << i))
 215                                 fd_resource(pfb->cbufs[i]->texture)->dirty = true;
 216
 217         if (buffers & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL)) {
 218                 fd_resource(pfb->zsbuf->texture)->dirty = true;
 219                 ctx->gmem_reason |= FD_GMEM_CLEARS_DEPTH_STENCIL;
 220         }
 221
 222         DBG("%x depth=%f, stencil=%u (%s/%s)", buffers, depth, stencil,
 223                 util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 224                 util_format_short_name(pipe_surface_format(pfb->zsbuf)));
 225
 226         fd_hw_query_set_stage(ctx, ctx->ring, FD_STAGE_CLEAR);
 227
 228         ctx->clear(ctx, buffers, color, depth, stencil);
 229
 230         ctx->dirty |= FD_DIRTY_ZSA |
 231                         FD_DIRTY_VIEWPORT |
 232                         FD_DIRTY_RASTERIZER |
 233                         FD_DIRTY_SAMPLE_MASK |
 234                         FD_DIRTY_PROG |
 235                         FD_DIRTY_CONSTBUF |
 236                         FD_DIRTY_BLEND;
 237
 238         if (fd_mesa_debug & FD_DBG_DCLEAR)
 239                 ctx->dirty = 0xffffffff;
 240 }
 241
 242 static void
 243 fd_clear_render_target(struct pipe_context *pctx, struct pipe_surface *ps,
 244                 const union pipe_color_union *color,
 245                 unsigned x, unsigned y, unsigned w, unsigned h)
 246 {
 247         DBG("TODO: x=%u, y=%u, w=%u, h=%u", x, y, w, h);
 248 }
 249
 250 static void
 251 fd_clear_depth_stencil(struct pipe_context *pctx, struct pipe_surface *ps,
 252                 unsigned buffers, double depth, unsigned stencil,
 253                 unsigned x, unsigned y, unsigned w, unsigned h)
 254 {
 255         DBG("TODO: buffers=%u, depth=%f, stencil=%u, x=%u, y=%u, w=%u, h=%u",
 256                         buffers, depth, stencil, x, y, w, h);
 257 }
 258
 259 void
 260 fd_draw_init(struct pipe_context *pctx)
 261 {
 262         list_inithead(&fd_context(pctx)->used_resources);
 263
 264         pctx->draw_vbo = fd_draw_vbo;
 265         pctx->clear = fd_clear;
 266         pctx->clear_render_target = fd_clear_render_target;
 267         pctx->clear_depth_stencil = fd_clear_depth_stencil;
 268 }