src/gallium/drivers/i965simple/brw_state_pool.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32 /** @file brw_state_pool.c
  33  * Implements the state pool allocator.
  34  *
  35  * For the 965, we create two state pools for state cache entries.  Objects
  36  * will be allocated into the pools depending on which state base address
  37  * their pointer is relative to in other 965 state.
  38  *
  39  * The state pools are relatively simple: As objects are allocated, increment
  40  * the offset to allocate space.  When the pool is "full" (rather, close to
  41  * full), we reset the pool and reset the state cache entries that point into
  42  * the pool.
  43  */
  44
  45 #include "pipe/internal/p_winsys_screen.h"
  46 #include "util/u_math.h"
  47 #include "util/u_memory.h"
  48 #include "pipe/p_inlines.h"
  49 #include "brw_context.h"
  50 #include "brw_state.h"
  51
  52 boolean brw_pool_alloc( struct brw_mem_pool *pool,
  53                           unsigned size,
  54                           unsigned alignment,
  55                           unsigned *offset_return)
  56 {
  57    unsigned fixup = align(pool->offset, alignment) - pool->offset;
  58
  59    size = align(size, 4);
  60
  61    if (pool->offset + fixup + size >= pool->size) {
  62       debug_printf("%s failed\n", __FUNCTION__);
  63       assert(0);
  64       exit(0);
  65    }
  66
  67    pool->offset += fixup;
  68    *offset_return = pool->offset;
  69    pool->offset += size;
  70
  71    return TRUE;
  72 }
  73
  74 static
  75 void brw_invalidate_pool( struct brw_mem_pool *pool )
  76 {
  77    if (BRW_DEBUG & DEBUG_STATE)
  78       debug_printf("\n\n\n %s \n\n\n", __FUNCTION__);
  79
  80    pool->offset = 0;
  81
  82    brw_clear_all_caches(pool->brw);
  83 }
  84
  85
  86 static void brw_init_pool( struct brw_context *brw,
  87                            unsigned pool_id,
  88                            unsigned size )
  89 {
  90    struct brw_mem_pool *pool = &brw->pool[pool_id];
  91
  92    pool->size = size;
  93    pool->brw = brw;
  94
  95    pool->buffer = pipe_buffer_create(brw->pipe.screen,
  96                                      4096,
  97                                      0 /*  DRM_BO_FLAG_MEM_TT */,
  98                                      size);
  99 }
 100
 101 static void brw_destroy_pool( struct brw_context *brw,
 102                               unsigned pool_id )
 103 {
 104    struct brw_mem_pool *pool = &brw->pool[pool_id];
 105
 106    pipe_buffer_reference( pool->brw->pipe.screen,
 107                           &pool->buffer,
 108                           NULL );
 109 }
 110
 111
 112 void brw_pool_check_wrap( struct brw_context *brw,
 113                           struct brw_mem_pool *pool )
 114 {
 115    if (pool->offset > (pool->size * 3) / 4) {
 116       brw->state.dirty.brw |= BRW_NEW_SCENE;
 117    }
 118
 119 }
 120
 121 void brw_init_pools( struct brw_context *brw )
 122 {
 123    brw_init_pool(brw, BRW_GS_POOL, 0x80000);
 124    brw_init_pool(brw, BRW_SS_POOL, 0x80000);
 125 }
 126
 127 void brw_destroy_pools( struct brw_context *brw )
 128 {
 129    brw_destroy_pool(brw, BRW_GS_POOL);
 130    brw_destroy_pool(brw, BRW_SS_POOL);
 131 }
 132
 133
 134 void brw_invalidate_pools( struct brw_context *brw )
 135 {
 136    brw_invalidate_pool(&brw->pool[BRW_GS_POOL]);
 137    brw_invalidate_pool(&brw->pool[BRW_SS_POOL]);
 138 }