src/gallium/drivers/freedreno/freedreno_context.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 "freedreno_context.h"
  30 #include "freedreno_vbo.h"
  31 #include "freedreno_blend.h"
  32 #include "freedreno_rasterizer.h"
  33 #include "freedreno_zsa.h"
  34 #include "freedreno_state.h"
  35 #include "freedreno_resource.h"
  36 #include "freedreno_clear.h"
  37 #include "freedreno_program.h"
  38 #include "freedreno_texture.h"
  39 #include "freedreno_gmem.h"
  40 #include "freedreno_util.h"
  41
  42 /* there are two cases where we currently need to wait for render complete:
  43  * 1) pctx->flush() .. since at the moment we have no way for DDX to sync
  44  *    the presentation blit with the 3d core
  45  * 2) wrap-around for ringbuffer.. possibly we can do something more
  46  *    Intelligent here.  Right now we need to ensure there is enough room
  47  *    at the end of the drawcmds in the cmdstream buffer for all the per-
  48  *    tile cmds.  We do this the lamest way possible, by making the ringbuffer
  49  *    big, and flushing and resetting back to the beginning if we get too
  50  *    close to the end.
  51  */
  52 static void
  53 fd_context_wait(struct pipe_context *pctx)
  54 {
  55         struct fd_context *ctx = fd_context(pctx);
  56         uint32_t ts = fd_ringbuffer_timestamp(ctx->ring);
  57
  58         DBG("wait: %u", ts);
  59
  60         fd_pipe_wait(ctx->screen->pipe, ts);
  61         fd_ringbuffer_reset(ctx->ring);
  62         fd_ringmarker_mark(ctx->draw_start);
  63 }
  64
  65 /* emit accumulated render cmds, needed for example if render target has
  66  * changed, or for flush()
  67  */
  68 void
  69 fd_context_render(struct pipe_context *pctx)
  70 {
  71         struct fd_context *ctx = fd_context(pctx);
  72         struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
  73
  74         DBG("needs_flush: %d", ctx->needs_flush);
  75
  76         if (!ctx->needs_flush)
  77                 return;
  78
  79         fd_gmem_render_tiles(pctx);
  80
  81         DBG("%p/%p/%p", ctx->ring->start, ctx->ring->cur, ctx->ring->end);
  82
  83         /* if size in dwords is more than half the buffer size, then wait and
  84          * wrap around:
  85          */
  86         if ((ctx->ring->cur - ctx->ring->start) > ctx->ring->size/8)
  87                 fd_context_wait(pctx);
  88
  89         ctx->needs_flush = false;
  90         ctx->cleared = ctx->restore = ctx->resolve = 0;
  91
  92         fd_resource(pfb->cbufs[0]->texture)->dirty = false;
  93         if (pfb->zsbuf)
  94                 fd_resource(pfb->zsbuf->texture)->dirty = false;
  95 }
  96
  97 static void
  98 fd_context_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
  99                 unsigned flags)
 100 {
 101         DBG("fence=%p", fence);
 102
 103 #if 0
 104         if (fence) {
 105                 fd_fence_ref(ctx->screen->fence.current,
 106                                 (struct fd_fence **)fence);
 107         }
 108 #endif
 109
 110         fd_context_render(pctx);
 111         fd_context_wait(pctx);
 112 }
 113
 114 static void
 115 fd_context_destroy(struct pipe_context *pctx)
 116 {
 117         struct fd_context *ctx = fd_context(pctx);
 118
 119         DBG("");
 120
 121         if (ctx->blitter)
 122                 util_blitter_destroy(ctx->blitter);
 123
 124         fd_ringmarker_del(ctx->draw_start);
 125         fd_ringmarker_del(ctx->draw_end);
 126         fd_ringbuffer_del(ctx->ring);
 127
 128         fd_prog_fini(pctx);
 129
 130         FREE(ctx);
 131 }
 132
 133 static struct pipe_resource *
 134 create_solid_vertexbuf(struct pipe_context *pctx)
 135 {
 136         static const float init_shader_const[] = {
 137                         /* for clear/gmem2mem: */
 138                         -1.000000, +1.000000, +1.000000, +1.100000,
 139                         +1.000000, +1.000000, -1.000000, -1.100000,
 140                         +1.000000, +1.100000, -1.100000, +1.000000,
 141                         /* for mem2gmem: (vertices) */
 142                         -1.000000, +1.000000, +1.000000, +1.000000,
 143                         +1.000000, +1.000000, -1.000000, -1.000000,
 144                         +1.000000, +1.000000, -1.000000, +1.000000,
 145                         /* for mem2gmem: (tex coords) */
 146                         +0.000000, +0.000000, +1.000000, +0.000000,
 147                         +0.000000, +1.000000, +1.000000, +1.000000,
 148         };
 149         struct pipe_resource *prsc = pipe_buffer_create(pctx->screen,
 150                         PIPE_BIND_CUSTOM, PIPE_USAGE_IMMUTABLE, sizeof(init_shader_const));
 151         pipe_buffer_write(pctx, prsc, 0,
 152                         sizeof(init_shader_const), init_shader_const);
 153         return prsc;
 154 }
 155
 156 struct pipe_context *
 157 fd_context_create(struct pipe_screen *pscreen, void *priv)
 158 {
 159         struct fd_screen *screen = fd_screen(pscreen);
 160         struct fd_context *ctx = CALLOC_STRUCT(fd_context);
 161         struct pipe_context *pctx;
 162
 163         if (!ctx)
 164                 return NULL;
 165
 166         DBG("");
 167
 168         ctx->screen = screen;
 169
 170         ctx->ring = fd_ringbuffer_new(screen->pipe, 0x100000);
 171         ctx->draw_start = fd_ringmarker_new(ctx->ring);
 172         ctx->draw_end = fd_ringmarker_new(ctx->ring);
 173
 174         pctx = &ctx->base;
 175         pctx->screen = pscreen;
 176         pctx->priv = priv;
 177         pctx->flush = fd_context_flush;
 178         pctx->destroy = fd_context_destroy;
 179
 180         util_slab_create(&ctx->transfer_pool, sizeof(struct pipe_transfer),
 181                         16, UTIL_SLAB_SINGLETHREADED);
 182
 183         fd_vbo_init(pctx);
 184         fd_blend_init(pctx);
 185         fd_rasterizer_init(pctx);
 186         fd_zsa_init(pctx);
 187         fd_state_init(pctx);
 188         fd_resource_context_init(pctx);
 189         fd_clear_init(pctx);
 190         fd_prog_init(pctx);
 191         fd_texture_init(pctx);
 192
 193         ctx->blitter = util_blitter_create(pctx);
 194         if (!ctx->blitter) {
 195                 fd_context_destroy(pctx);
 196                 return NULL;
 197         }
 198
 199         /* construct vertex state used for solid ops (clear, and gmem<->mem) */
 200         ctx->solid_vertexbuf = create_solid_vertexbuf(pctx);
 201
 202         fd_state_emit_setup(pctx);
 203
 204         return pctx;
 205 }