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_used(struct fd_context *ctx, struct pipe_resource *prsc, boolean reading)
  44 {
  45         struct fd_resource *rsc;
  46
  47         if (!prsc)
  48                 return;
  49
  50         rsc = fd_resource(prsc);
  51         if (reading)
  52                 rsc->reading = true;
  53         else
  54                 rsc->writing = true;
  55         list_delinit(&rsc->list);
  56         list_addtail(&rsc->list, &ctx->used_resources);
  57 }
  58
  59 static void
  60 fd_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
  61 {
  62         struct fd_context *ctx = fd_context(pctx);
  63         struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
  64         struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
  65         unsigned i, buffers = 0;
  66
  67         /* if we supported transform feedback, we'd have to disable this: */
  68         if (((scissor->maxx - scissor->minx) *
  69                         (scissor->maxy - scissor->miny)) == 0) {
  70                 return;
  71         }
  72
  73         /* emulate unsupported primitives: */
  74         if (!fd_supported_prim(ctx, info->mode)) {
  75                 util_primconvert_save_index_buffer(ctx->primconvert, &ctx->indexbuf);
  76                 util_primconvert_save_rasterizer_state(ctx->primconvert, ctx->rasterizer);
  77                 util_primconvert_draw_vbo(ctx->primconvert, info);
  78                 return;
  79         }
  80
  81         ctx->needs_flush = true;
  82
  83         /*
  84          * Figure out the buffers/features we need:
  85          */
  86
  87         if (fd_depth_enabled(ctx)) {
  88                 buffers |= FD_BUFFER_DEPTH;
  89                 fd_resource(pfb->zsbuf->texture)->dirty = true;
  90                 ctx->gmem_reason |= FD_GMEM_DEPTH_ENABLED;
  91         }
  92
  93         if (fd_stencil_enabled(ctx)) {
  94                 struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
  95                 buffers |= FD_BUFFER_STENCIL;
  96                 if (rsc->stencil)
  97                         rsc->stencil->dirty = true;
  98                 else
  99                         rsc->dirty = true;
 100                 ctx->gmem_reason |= FD_GMEM_STENCIL_ENABLED;
 101         }
 102
 103         if (fd_logicop_enabled(ctx))
 104                 ctx->gmem_reason |= FD_GMEM_LOGICOP_ENABLED;
 105
 106         for (i = 0; i < pfb->nr_cbufs; i++) {
 107                 struct pipe_resource *surf;
 108
 109                 if (!pfb->cbufs[i])
 110                         continue;
 111
 112                 surf = pfb->cbufs[i]->texture;
 113
 114                 fd_resource(surf)->dirty = true;
 115                 buffers |= PIPE_CLEAR_COLOR0 << i;
 116
 117                 if (surf->nr_samples > 1)
 118                         ctx->gmem_reason |= FD_GMEM_MSAA_ENABLED;
 119
 120                 if (fd_blend_enabled(ctx, i))
 121                         ctx->gmem_reason |= FD_GMEM_BLEND_ENABLED;
 122         }
 123
 124         /* Skip over buffer 0, that is sent along with the command stream */
 125         for (i = 1; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
 126                 resource_used(ctx, ctx->constbuf[PIPE_SHADER_VERTEX].cb[i].buffer, true);
 127                 resource_used(ctx, ctx->constbuf[PIPE_SHADER_FRAGMENT].cb[i].buffer, true);
 128         }
 129
 130         /* Mark VBOs as being read */
 131         for (i = 0; i < ctx->vtx.vertexbuf.count; i++) {
 132                 assert(!ctx->vtx.vertexbuf.vb[i].user_buffer);
 133                 resource_used(ctx, ctx->vtx.vertexbuf.vb[i].buffer, true);
 134         }
 135
 136         /* Mark index buffer as being read */
 137         resource_used(ctx, ctx->indexbuf.buffer, true);
 138
 139         /* Mark textures as being read */
 140         for (i = 0; i < ctx->verttex.num_textures; i++)
 141                 if (ctx->verttex.textures[i])
 142                         resource_used(ctx, ctx->verttex.textures[i]->texture, true);
 143         for (i = 0; i < ctx->fragtex.num_textures; i++)
 144                 if (ctx->fragtex.textures[i])
 145                         resource_used(ctx, ctx->fragtex.textures[i]->texture, true);
 146
 147         ctx->num_draws++;
 148
 149         ctx->stats.draw_calls++;
 150         ctx->stats.prims_emitted +=
 151                 u_reduced_prims_for_vertices(info->mode, info->count);
 152
 153         /* any buffers that haven't been cleared yet, we need to restore: */
 154         ctx->restore |= buffers & (FD_BUFFER_ALL & ~ctx->cleared);
 155         /* and any buffers used, need to be resolved: */
 156         ctx->resolve |= buffers;
 157
 158         DBG("%x num_draws=%u (%s/%s)", buffers, ctx->num_draws,
 159                 util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 160                 util_format_short_name(pipe_surface_format(pfb->zsbuf)));
 161
 162         fd_hw_query_set_stage(ctx, ctx->ring, FD_STAGE_DRAW);
 163         ctx->draw_vbo(ctx, info);
 164
 165         /* if an app (or, well, piglit test) does many thousands of draws
 166          * without flush (or anything which implicitly flushes, like
 167          * changing render targets), we can exceed the ringbuffer size.
 168          * Since we don't currently have a sane way to wrapparound, and
 169          * we use the same buffer for both draw and tiling commands, for
 170          * now we need to do this hack and trigger flush if we are running
 171          * low on remaining space for cmds:
 172          */
 173         if (((ctx->ring->cur - ctx->ring->start) >
 174                                 (ctx->ring->size/4 - FD_TILING_COMMANDS_DWORDS)) ||
 175                         (fd_mesa_debug & FD_DBG_FLUSH))
 176                 fd_context_render(pctx);
 177 }
 178
 179 /* TODO figure out how to make better use of existing state mechanism
 180  * for clear (and possibly gmem->mem / mem->gmem) so we can (a) keep
 181  * track of what state really actually changes, and (b) reduce the code
 182  * in the a2xx/a3xx parts.
 183  */
 184
 185 static void
 186 fd_clear(struct pipe_context *pctx, unsigned buffers,
 187                 const union pipe_color_union *color, double depth, unsigned stencil)
 188 {
 189         struct fd_context *ctx = fd_context(pctx);
 190         struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
 191         struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
 192         unsigned cleared_buffers;
 193         int i;
 194
 195         /* for bookkeeping about which buffers have been cleared (and thus
 196          * can fully or partially skip mem2gmem) we need to ignore buffers
 197          * that have already had a draw, in case apps do silly things like
 198          * clear after draw (ie. if you only clear the color buffer, but
 199          * something like alpha-test causes side effects from the draw in
 200          * the depth buffer, etc)
 201          */
 202         cleared_buffers = buffers & (FD_BUFFER_ALL & ~ctx->restore);
 203
 204         /* do we have full-screen scissor? */
 205         if (!memcmp(scissor, &ctx->disabled_scissor, sizeof(*scissor))) {
 206                 ctx->cleared |= cleared_buffers;
 207         } else {
 208                 ctx->partial_cleared |= cleared_buffers;
 209                 if (cleared_buffers & PIPE_CLEAR_COLOR)
 210                         ctx->cleared_scissor.color = *scissor;
 211                 if (cleared_buffers & PIPE_CLEAR_DEPTH)
 212                         ctx->cleared_scissor.depth = *scissor;
 213                 if (cleared_buffers & PIPE_CLEAR_STENCIL)
 214                         ctx->cleared_scissor.stencil = *scissor;
 215         }
 216         ctx->resolve |= buffers;
 217         ctx->needs_flush = true;
 218
 219         if (buffers & PIPE_CLEAR_COLOR)
 220                 for (i = 0; i < pfb->nr_cbufs; i++)
 221                         if (buffers & (PIPE_CLEAR_COLOR0 << i))
 222                                 fd_resource(pfb->cbufs[i]->texture)->dirty = true;
 223
 224         if (buffers & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL)) {
 225                 struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
 226                 if (rsc->stencil && buffers & PIPE_CLEAR_STENCIL)
 227                         rsc->stencil->dirty = true;
 228                 if (!rsc->stencil || buffers & PIPE_CLEAR_DEPTH)
 229                         rsc->dirty = true;
 230
 231                 ctx->gmem_reason |= FD_GMEM_CLEARS_DEPTH_STENCIL;
 232         }
 233
 234         DBG("%x depth=%f, stencil=%u (%s/%s)", buffers, depth, stencil,
 235                 util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 236                 util_format_short_name(pipe_surface_format(pfb->zsbuf)));
 237
 238         fd_hw_query_set_stage(ctx, ctx->ring, FD_STAGE_CLEAR);
 239
 240         ctx->clear(ctx, buffers, color, depth, stencil);
 241
 242         ctx->dirty |= FD_DIRTY_ZSA |
 243                         FD_DIRTY_VIEWPORT |
 244                         FD_DIRTY_RASTERIZER |
 245                         FD_DIRTY_SAMPLE_MASK |
 246                         FD_DIRTY_PROG |
 247                         FD_DIRTY_CONSTBUF |
 248                         FD_DIRTY_BLEND;
 249
 250         if (fd_mesa_debug & FD_DBG_DCLEAR)
 251                 ctx->dirty = 0xffffffff;
 252 }
 253
 254 static void
 255 fd_clear_render_target(struct pipe_context *pctx, struct pipe_surface *ps,
 256                 const union pipe_color_union *color,
 257                 unsigned x, unsigned y, unsigned w, unsigned h)
 258 {
 259         DBG("TODO: x=%u, y=%u, w=%u, h=%u", x, y, w, h);
 260 }
 261
 262 static void
 263 fd_clear_depth_stencil(struct pipe_context *pctx, struct pipe_surface *ps,
 264                 unsigned buffers, double depth, unsigned stencil,
 265                 unsigned x, unsigned y, unsigned w, unsigned h)
 266 {
 267         DBG("TODO: buffers=%u, depth=%f, stencil=%u, x=%u, y=%u, w=%u, h=%u",
 268                         buffers, depth, stencil, x, y, w, h);
 269 }
 270
 271 void
 272 fd_draw_init(struct pipe_context *pctx)
 273 {
 274         list_inithead(&fd_context(pctx)->used_resources);
 275
 276         pctx->draw_vbo = fd_draw_vbo;
 277         pctx->clear = fd_clear;
 278         pctx->clear_render_target = fd_clear_render_target;
 279         pctx->clear_depth_stencil = fd_clear_depth_stencil;
 280 }