summaryrefslogtreecommitdiff
path: root/src/mesa/pipe/cell/ppu/cell_batch.c
blob: ab4553f16caefbda0f4a02fe69b8ec293ae47daa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/


#include "cell_context.h"
#include "cell_batch.h"
#include "cell_spu.h"


void
cell_batch_flush(struct cell_context *cell)
{
   uint batch = cell->cur_batch;
   const uint size = cell->batch_buffer_size[batch];
   uint spu, cmd_word;

   if (size == 0)
      return;

   assert(batch < CELL_NUM_BATCH_BUFFERS);

   /*
   printf("cell_batch_dispatch: buf %u at %p, size %u\n",
          batch, &cell->batch_buffer[batch][0], size);
   */
     
   /*
    * Build "BATCH" command and sent to all SPUs.
    */
   cmd_word = CELL_CMD_BATCH | (batch << 8) | (size << 16);

   for (spu = 0; spu < cell->num_spus; spu++) {
      assert(cell->buffer_status[spu][batch][0] == CELL_BUFFER_STATUS_USED);
      send_mbox_message(cell_global.spe_contexts[spu], cmd_word);
   }

   /* When the SPUs are done copying the buffer into their locals stores
    * they'll write a BUFFER_STATUS_FREE message into the buffer_status[]
    * array indicating that the PPU can re-use the buffer.
    */


   /* Find a buffer that's marked as free by all SPUs */
   while (1) {
      uint num_free = 0;

      batch = (batch + 1) % CELL_NUM_BATCH_BUFFERS;

      for (spu = 0; spu < cell->num_spus; spu++) {
         if (cell->buffer_status[spu][batch][0] == CELL_BUFFER_STATUS_FREE)
            num_free++;
      }

      if (num_free == cell->num_spus) {
         /* found a free buffer, now mark status as used */
         for (spu = 0; spu < cell->num_spus; spu++) {
            cell->buffer_status[spu][batch][0] = CELL_BUFFER_STATUS_USED;
         }
         break;
      }
   }

   cell->batch_buffer_size[batch] = 0;  /* empty */
   cell->cur_batch = batch;
}


/**
 * \param cmd  command to append
 * \param length  command size in bytes
 */
void
cell_batch_append(struct cell_context *cell, const void *cmd, uint length)
{
   uint size;

   assert(length % 4 == 0);
   assert(cell->cur_batch >= 0);

   size = cell->batch_buffer_size[cell->cur_batch];

   if (size + length > CELL_BATCH_BUFFER_SIZE) {
      cell_batch_flush(cell);
      size = 0;
   }

   assert(size + length <= CELL_BATCH_BUFFER_SIZE);

   memcpy(cell->batch_buffer[cell->cur_batch] + size, cmd, length);

   cell->batch_buffer_size[cell->cur_batch] = size + length;
}


void *
cell_batch_alloc(struct cell_context *cell, uint bytes)
{
   void *pos;
   uint size;

   assert(cell->cur_batch >= 0);

   size = cell->batch_buffer_size[cell->cur_batch];

   if (size + bytes > CELL_BATCH_BUFFER_SIZE) {
      cell_batch_flush(cell);
      size = 0;
   }

   assert(size + bytes <= CELL_BATCH_BUFFER_SIZE);

   pos = (void *) (cell->batch_buffer[cell->cur_batch] + size);

   cell->batch_buffer_size[cell->cur_batch] = size + bytes;

   return pos;
}