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                 struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
  92                 buffers |= FD_BUFFER_STENCIL;
  93                 if (rsc->stencil)
  94                         rsc->stencil->dirty = true;
  95                 else
  96                         rsc->dirty = true;
  97                 ctx->gmem_reason |= FD_GMEM_STENCIL_ENABLED;
  98         }
  99
 100         if (fd_logicop_enabled(ctx))
 101                 ctx->gmem_reason |= FD_GMEM_LOGICOP_ENABLED;
 102
 103         for (i = 0; i < pfb->nr_cbufs; i++) {
 104                 struct pipe_resource *surf;
 105
 106                 if (!pfb->cbufs[i])
 107                         continue;
 108
 109                 surf = pfb->cbufs[i]->texture;
 110
 111                 fd_resource(surf)->dirty = true;
 112                 buffers |= PIPE_CLEAR_COLOR0 << i;
 113
 114                 if (surf->nr_samples > 1)
 115                         ctx->gmem_reason |= FD_GMEM_MSAA_ENABLED;
 116
 117                 if (fd_blend_enabled(ctx, i))
 118                         ctx->gmem_reason |= FD_GMEM_BLEND_ENABLED;
 119         }
 120
 121         /* Skip over buffer 0, that is sent along with the command stream */
 122         for (i = 1; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
 123                 resource_reading(ctx, ctx->constbuf[PIPE_SHADER_VERTEX].cb[i].buffer);
 124                 resource_reading(ctx, ctx->constbuf[PIPE_SHADER_FRAGMENT].cb[i].buffer);
 125         }
 126
 127         /* Mark VBOs as being read */
 128         for (i = 0; i < ctx->vtx.vertexbuf.count; i++) {
 129                 assert(!ctx->vtx.vertexbuf.vb[i].user_buffer);
 130                 resource_reading(ctx, ctx->vtx.vertexbuf.vb[i].buffer);
 131         }
 132
 133         /* Mark index buffer as being read */
 134         resource_reading(ctx, ctx->indexbuf.buffer);
 135
 136         /* Mark textures as being read */
 137         for (i = 0; i < ctx->verttex.num_textures; i++)
 138                 if (ctx->verttex.textures[i])
 139                         resource_reading(ctx, ctx->verttex.textures[i]->texture);
 140         for (i = 0; i < ctx->fragtex.num_textures; i++)
 141                 if (ctx->fragtex.textures[i])
 142                         resource_reading(ctx, ctx->fragtex.textures[i]->texture);
 143
 144         ctx->num_draws++;
 145
 146         ctx->stats.draw_calls++;
 147         ctx->stats.prims_emitted +=
 148                 u_reduced_prims_for_vertices(info->mode, info->count);
 149
 150         /* any buffers that haven't been cleared yet, we need to restore: */
 151         ctx->restore |= buffers & (FD_BUFFER_ALL & ~ctx->cleared);
 152         /* and any buffers used, need to be resolved: */
 153         ctx->resolve |= buffers;
 154
 155         DBG("%x num_draws=%u (%s/%s)", buffers, ctx->num_draws,
 156                 util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 157                 util_format_short_name(pipe_surface_format(pfb->zsbuf)));
 158
 159         fd_hw_query_set_stage(ctx, ctx->ring, FD_STAGE_DRAW);
 160         ctx->draw_vbo(ctx, info);
 161
 162         /* if an app (or, well, piglit test) does many thousands of draws
 163          * without flush (or anything which implicitly flushes, like
 164          * changing render targets), we can exceed the ringbuffer size.
 165          * Since we don't currently have a sane way to wrapparound, and
 166          * we use the same buffer for both draw and tiling commands, for
 167          * now we need to do this hack and trigger flush if we are running
 168          * low on remaining space for cmds:
 169          */
 170         if (((ctx->ring->cur - ctx->ring->start) >
 171                                 (ctx->ring->size/4 - FD_TILING_COMMANDS_DWORDS)) ||
 172                         (fd_mesa_debug & FD_DBG_FLUSH))
 173                 fd_context_render(pctx);
 174 }
 175
 176 /* TODO figure out how to make better use of existing state mechanism
 177  * for clear (and possibly gmem->mem / mem->gmem) so we can (a) keep
 178  * track of what state really actually changes, and (b) reduce the code
 179  * in the a2xx/a3xx parts.
 180  */
 181
 182 static void
 183 fd_clear(struct pipe_context *pctx, unsigned buffers,
 184                 const union pipe_color_union *color, double depth, unsigned stencil)
 185 {
 186         struct fd_context *ctx = fd_context(pctx);
 187         struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
 188         struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
 189         unsigned cleared_buffers;
 190         int i;
 191
 192         /* for bookkeeping about which buffers have been cleared (and thus
 193          * can fully or partially skip mem2gmem) we need to ignore buffers
 194          * that have already had a draw, in case apps do silly things like
 195          * clear after draw (ie. if you only clear the color buffer, but
 196          * something like alpha-test causes side effects from the draw in
 197          * the depth buffer, etc)
 198          */
 199         cleared_buffers = buffers & (FD_BUFFER_ALL & ~ctx->restore);
 200
 201         /* do we have full-screen scissor? */
 202         if (!memcmp(scissor, &ctx->disabled_scissor, sizeof(*scissor))) {
 203                 ctx->cleared |= cleared_buffers;
 204         } else {
 205                 ctx->partial_cleared |= cleared_buffers;
 206                 if (cleared_buffers & PIPE_CLEAR_COLOR)
 207                         ctx->cleared_scissor.color = *scissor;
 208                 if (cleared_buffers & PIPE_CLEAR_DEPTH)
 209                         ctx->cleared_scissor.depth = *scissor;
 210                 if (cleared_buffers & PIPE_CLEAR_STENCIL)
 211                         ctx->cleared_scissor.stencil = *scissor;
 212         }
 213         ctx->resolve |= buffers;
 214         ctx->needs_flush = true;
 215
 216         if (buffers & PIPE_CLEAR_COLOR)
 217                 for (i = 0; i < pfb->nr_cbufs; i++)
 218                         if (buffers & (PIPE_CLEAR_COLOR0 << i))
 219                                 fd_resource(pfb->cbufs[i]->texture)->dirty = true;
 220
 221         if (buffers & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL)) {
 222                 struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
 223                 if (rsc->stencil && buffers & PIPE_CLEAR_STENCIL)
 224                         rsc->stencil->dirty = true;
 225                 if (!rsc->stencil || buffers & PIPE_CLEAR_DEPTH)
 226                         rsc->dirty = true;
 227
 228                 ctx->gmem_reason |= FD_GMEM_CLEARS_DEPTH_STENCIL;
 229         }
 230
 231         DBG("%x depth=%f, stencil=%u (%s/%s)", buffers, depth, stencil,
 232                 util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 233                 util_format_short_name(pipe_surface_format(pfb->zsbuf)));
 234
 235         fd_hw_query_set_stage(ctx, ctx->ring, FD_STAGE_CLEAR);
 236
 237         ctx->clear(ctx, buffers, color, depth, stencil);
 238
 239         ctx->dirty |= FD_DIRTY_ZSA |
 240                         FD_DIRTY_VIEWPORT |
 241                         FD_DIRTY_RASTERIZER |
 242                         FD_DIRTY_SAMPLE_MASK |
 243                         FD_DIRTY_PROG |
 244                         FD_DIRTY_CONSTBUF |
 245                         FD_DIRTY_BLEND;
 246
 247         if (fd_mesa_debug & FD_DBG_DCLEAR)
 248                 ctx->dirty = 0xffffffff;
 249 }
 250
 251 static void
 252 fd_clear_render_target(struct pipe_context *pctx, struct pipe_surface *ps,
 253                 const union pipe_color_union *color,
 254                 unsigned x, unsigned y, unsigned w, unsigned h)
 255 {
 256         DBG("TODO: x=%u, y=%u, w=%u, h=%u", x, y, w, h);
 257 }
 258
 259 static void
 260 fd_clear_depth_stencil(struct pipe_context *pctx, struct pipe_surface *ps,
 261                 unsigned buffers, double depth, unsigned stencil,
 262                 unsigned x, unsigned y, unsigned w, unsigned h)
 263 {
 264         DBG("TODO: buffers=%u, depth=%f, stencil=%u, x=%u, y=%u, w=%u, h=%u",
 265                         buffers, depth, stencil, x, y, w, h);
 266 }
 267
 268 void
 269 fd_draw_init(struct pipe_context *pctx)
 270 {
 271         list_inithead(&fd_context(pctx)->used_resources);
 272
 273         pctx->draw_vbo = fd_draw_vbo;
 274         pctx->clear = fd_clear;
 275         pctx->clear_render_target = fd_clear_render_target;
 276         pctx->clear_depth_stencil = fd_clear_depth_stencil;
 277 }