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         ctx->gmem_reason = 0;
  87         ctx->num_draws = 0;
  88
  89         fd_resource(pfb->cbufs[0]->texture)->dirty = false;
  90         if (pfb->zsbuf)
  91                 fd_resource(pfb->zsbuf->texture)->dirty = false;
  92 }
  93
  94 static void
  95 fd_context_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
  96                 unsigned flags)
  97 {
  98         DBG("fence=%p", fence);
  99
 100 #if 0
 101         if (fence) {
 102                 fd_fence_ref(ctx->screen->fence.current,
 103                                 (struct fd_fence **)fence);
 104         }
 105 #endif
 106
 107         fd_context_render(pctx);
 108 }
 109
 110 void
 111 fd_context_destroy(struct pipe_context *pctx)
 112 {
 113         struct fd_context *ctx = fd_context(pctx);
 114
 115         DBG("");
 116
 117         if (ctx->blitter)
 118                 util_blitter_destroy(ctx->blitter);
 119
 120         fd_ringmarker_del(ctx->draw_start);
 121         fd_ringmarker_del(ctx->draw_end);
 122         fd_ringbuffer_del(ctx->ring);
 123
 124         FREE(ctx);
 125 }
 126
 127 struct pipe_context *
 128 fd_context_init(struct fd_context *ctx,
 129                 struct pipe_screen *pscreen, void *priv)
 130 {
 131         struct fd_screen *screen = fd_screen(pscreen);
 132         struct pipe_context *pctx;
 133
 134         ctx->screen = screen;
 135
 136         /* need some sane default in case state tracker doesn't
 137          * set some state:
 138          */
 139         ctx->sample_mask = 0xffff;
 140
 141         pctx = &ctx->base;
 142         pctx->screen = pscreen;
 143         pctx->priv = priv;
 144         pctx->flush = fd_context_flush;
 145
 146         ctx->ring = fd_ringbuffer_new(screen->pipe, 0x100000);
 147         if (!ctx->ring)
 148                 goto fail;
 149
 150         ctx->draw_start = fd_ringmarker_new(ctx->ring);
 151         ctx->draw_end = fd_ringmarker_new(ctx->ring);
 152
 153         util_slab_create(&ctx->transfer_pool, sizeof(struct pipe_transfer),
 154                         16, UTIL_SLAB_SINGLETHREADED);
 155
 156         fd_draw_init(pctx);
 157         fd_resource_context_init(pctx);
 158         fd_texture_init(pctx);
 159         fd_state_init(pctx);
 160
 161         ctx->blitter = util_blitter_create(pctx);
 162         if (!ctx->blitter)
 163                 goto fail;
 164
 165
 166         return pctx;
 167
 168 fail:
 169         pctx->destroy(pctx);
 170         return NULL;
 171 }