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_draw.h"
  31 #include "freedreno_resource.h"
  32 #include "freedreno_texture.h"
  33 #include "freedreno_state.h"
  34 #include "freedreno_gmem.h"
  35 #include "freedreno_util.h"
  36
  37 /* there are two cases where we currently need to wait for render complete:
  38  * 1) pctx->flush() .. since at the moment we have no way for DDX to sync
  39  *    the presentation blit with the 3d core
  40  * 2) wrap-around for ringbuffer.. possibly we can do something more
  41  *    Intelligent here.  Right now we need to ensure there is enough room
  42  *    at the end of the drawcmds in the cmdstream buffer for all the per-
  43  *    tile cmds.  We do this the lamest way possible, by making the ringbuffer
  44  *    big, and flushing and resetting back to the beginning if we get too
  45  *    close to the end.
  46  */
  47 static void
  48 fd_context_wait(struct pipe_context *pctx)
  49 {
  50         struct fd_context *ctx = fd_context(pctx);
  51         uint32_t ts = fd_ringbuffer_timestamp(ctx->ring);
  52
  53         DBG("wait: %u", ts);
  54
  55         fd_pipe_wait(ctx->screen->pipe, ts);
  56         fd_ringbuffer_reset(ctx->ring);
  57         fd_ringmarker_mark(ctx->draw_start);
  58 }
  59
  60 /* emit accumulated render cmds, needed for example if render target has
  61  * changed, or for flush()
  62  */
  63 void
  64 fd_context_render(struct pipe_context *pctx)
  65 {
  66         struct fd_context *ctx = fd_context(pctx);
  67         struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
  68
  69         DBG("needs_flush: %d", ctx->needs_flush);
  70
  71         if (!ctx->needs_flush)
  72                 return;
  73
  74         fd_gmem_render_tiles(pctx);
  75
  76         DBG("%p/%p/%p", ctx->ring->start, ctx->ring->cur, ctx->ring->end);
  77
  78         /* if size in dwords is more than half the buffer size, then wait and
  79          * wrap around:
  80          */
  81         if ((ctx->ring->cur - ctx->ring->start) > ctx->ring->size/8)
  82                 fd_context_wait(pctx);
  83
  84         ctx->needs_flush = false;
  85         ctx->cleared = ctx->restore = ctx->resolve = 0;
  86
  87         fd_resource(pfb->cbufs[0]->texture)->dirty = false;
  88         if (pfb->zsbuf)
  89                 fd_resource(pfb->zsbuf->texture)->dirty = false;
  90 }
  91
  92 static void
  93 fd_context_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
  94                 unsigned flags)
  95 {
  96         DBG("fence=%p", fence);
  97
  98 #if 0
  99         if (fence) {
 100                 fd_fence_ref(ctx->screen->fence.current,
 101                                 (struct fd_fence **)fence);
 102         }
 103 #endif
 104
 105         fd_context_render(pctx);
 106 }
 107
 108 void
 109 fd_context_destroy(struct pipe_context *pctx)
 110 {
 111         struct fd_context *ctx = fd_context(pctx);
 112
 113         DBG("");
 114
 115         if (ctx->blitter)
 116                 util_blitter_destroy(ctx->blitter);
 117
 118         fd_ringmarker_del(ctx->draw_start);
 119         fd_ringmarker_del(ctx->draw_end);
 120         fd_ringbuffer_del(ctx->ring);
 121
 122         FREE(ctx);
 123 }
 124
 125 struct pipe_context *
 126 fd_context_init(struct fd_context *ctx,
 127                 struct pipe_screen *pscreen, void *priv)
 128 {
 129         struct fd_screen *screen = fd_screen(pscreen);
 130         struct pipe_context *pctx;
 131
 132         ctx->screen = screen;
 133
 134         /* need some sane default in case state tracker doesn't
 135          * set some state:
 136          */
 137         ctx->sample_mask = 0xffff;
 138
 139         pctx = &ctx->base;
 140         pctx->screen = pscreen;
 141         pctx->priv = priv;
 142         pctx->flush = fd_context_flush;
 143
 144         ctx->ring = fd_ringbuffer_new(screen->pipe, 0x100000);
 145         if (!ctx->ring)
 146                 goto fail;
 147
 148         ctx->draw_start = fd_ringmarker_new(ctx->ring);
 149         ctx->draw_end = fd_ringmarker_new(ctx->ring);
 150
 151         util_slab_create(&ctx->transfer_pool, sizeof(struct pipe_transfer),
 152                         16, UTIL_SLAB_SINGLETHREADED);
 153
 154         fd_draw_init(pctx);
 155         fd_resource_context_init(pctx);
 156         fd_texture_init(pctx);
 157         fd_state_init(pctx);
 158
 159         ctx->blitter = util_blitter_create(pctx);
 160         if (!ctx->blitter)
 161                 goto fail;
 162
 163
 164         return pctx;
 165
 166 fail:
 167         pctx->destroy(pctx);
 168         return NULL;
 169 }