src/gallium/drivers/r300/r300_flush.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #include "draw/draw_context.h"
  25 #include "draw/draw_private.h"
  26
  27 #include "util/u_simple_list.h"
  28
  29 #include "r300_context.h"
  30 #include "r300_cs.h"
  31 #include "r300_emit.h"
  32 #include "r300_flush.h"
  33
  34 static void r300_flush(struct pipe_context* pipe,
  35                        unsigned flags,
  36                        struct pipe_fence_handle** fence)
  37 {
  38     struct r300_context *r300 = r300_context(pipe);
  39     struct r300_query *query;
  40     struct r300_atom *atom;
  41     struct pipe_framebuffer_state *fb;
  42     unsigned i;
  43
  44     CS_LOCALS(r300);
  45     (void) cs_count;
  46     /* We probably need to flush Draw, but we may have been called from
  47      * within Draw. This feels kludgy, but it might be the best thing.
  48      *
  49      * Of course, the best thing is to kill Draw with fire. :3 */
  50     if (r300->draw && !r300->draw->flushing) {
  51         draw_flush(r300->draw);
  52     }
  53
  54     if (r300->dirty_hw) {
  55         r300_emit_query_end(r300);
  56
  57         FLUSH_CS;
  58         r300->dirty_hw = 0;
  59
  60         /* New kitchen sink, baby. */
  61         foreach(atom, &r300->atom_list) {
  62             if (atom->state || atom->allow_null_state) {
  63                 atom->dirty = TRUE;
  64             }
  65         }
  66
  67         /* Unmark HWTCL state for SWTCL. */
  68         if (!r300->screen->caps.has_tcl) {
  69             r300->vs_state.dirty = FALSE;
  70             r300->vs_constants.dirty = FALSE;
  71         }
  72     }
  73
  74     /* reset flushed query */
  75     foreach(query, &r300->query_list) {
  76         query->flushed = TRUE;
  77     }
  78
  79     /* XXX
  80      *
  81      * This is a preliminary implementation of glFinish. Note that st/mesa
  82      * uses a non-null fence when glFinish is called and then waits for
  83      * the fence. Instead of returning the actual fence, we do the sync
  84      * directly.
  85      *
  86      * The ideal implementation should use something like EmitIrqLocked and
  87      * WaitIrq, or better, real fences.
  88      *
  89      * This feature degrades performance to the level of r300c for games that
  90      * use glFinish a lot, even openarena does. Ideally we wouldn't need
  91      * glFinish at all if we had proper throttling in swapbuffers so that
  92      * the CPU wouldn't outrun the GPU by several frames, so this is basically
  93      * a temporary fix for the input lag. Once swap&sync works with DRI2,
  94      * I'll be happy to remove this code.
  95      *
  96      * - M. */
  97     if (fence && r300->fb_state.state) {
  98         fb = r300->fb_state.state;
  99
 100         for (i = 0; i < fb->nr_cbufs; i++) {
 101             if (fb->cbufs[i]->texture) {
 102                 r300->rws->buffer_wait(r300->rws,
 103                     r300_texture(fb->cbufs[i]->texture)->buffer);
 104             }
 105             if (fb->zsbuf) {
 106                 r300->rws->buffer_wait(r300->rws,
 107                     r300_texture(fb->zsbuf->texture)->buffer);
 108             }
 109         }
 110     }
 111 }
 112
 113 void r300_init_flush_functions(struct r300_context* r300)
 114 {
 115     r300->context.flush = r300_flush;
 116 }