src/gallium/drivers/cell/ppu/cell_spu.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * 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, sub license, 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 portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include <pthread.h>
  30
  31 #include "cell_spu.h"
  32 #include "pipe/p_format.h"
  33 #include "pipe/p_state.h"
  34 #include "cell/common.h"
  35
  36
  37 /*
  38 helpful headers:
  39 /opt/ibm/cell-sdk/prototype/src/include/ppu/cbe_mfc.h
  40 */
  41
  42
  43 struct cell_global_info cell_global;
  44
  45
  46 /**
  47  * Write a 1-word message to the given SPE mailbox.
  48  */
  49 void
  50 send_mbox_message(spe_context_ptr_t ctx, unsigned int msg)
  51 {
  52    spe_in_mbox_write(ctx, &msg, 1, SPE_MBOX_ALL_BLOCKING);
  53 }
  54
  55
  56 /**
  57  * Wait for a 1-word message to arrive in given mailbox.
  58  */
  59 uint
  60 wait_mbox_message(spe_context_ptr_t ctx)
  61 {
  62    do {
  63       unsigned data;
  64       int count = spe_out_mbox_read(ctx, &data, 1);
  65
  66       if (count == 1) {
  67          return data;
  68       }
  69
  70       if (count < 0) {
  71          /* error */ ;
  72       }
  73    } while (1);
  74 }
  75
  76
  77 static void *cell_thread_function(void *arg)
  78 {
  79    struct cell_init_info *init = (struct cell_init_info *) arg;
  80    unsigned entry = SPE_DEFAULT_ENTRY;
  81
  82    ASSERT_ALIGN16(init);
  83
  84    if (spe_context_run(cell_global.spe_contexts[init->id], &entry, 0,
  85                        init, NULL, NULL) < 0) {
  86       fprintf(stderr, "spe_context_run() failed\n");
  87       exit(1);
  88    }
  89
  90    pthread_exit(NULL);
  91 }
  92
  93
  94 /**
  95  * Create the SPU threads
  96  */
  97 void
  98 cell_start_spus(struct cell_context *cell)
  99 {
 100    uint i, j;
 101
 102    assert(cell->num_spus <= MAX_SPUS);
 103
 104    ASSERT_ALIGN16(&cell_global.command[0]);
 105    ASSERT_ALIGN16(&cell_global.command[1]);
 106
 107    ASSERT_ALIGN16(&cell_global.inits[0]);
 108    ASSERT_ALIGN16(&cell_global.inits[1]);
 109
 110    for (i = 0; i < cell->num_spus; i++) {
 111       cell_global.inits[i].id = i;
 112       cell_global.inits[i].num_spus = cell->num_spus;
 113       cell_global.inits[i].cmd = &cell_global.command[i];
 114       for (j = 0; j < CELL_NUM_BUFFERS; j++) {
 115          cell_global.inits[i].buffers[j] = cell->buffer[j];
 116       }
 117       cell_global.inits[i].buffer_status = &cell->buffer_status[0][0][0];
 118
 119       cell_global.spe_contexts[i] = spe_context_create(0, NULL);
 120       if (!cell_global.spe_contexts[i]) {
 121          fprintf(stderr, "spe_context_create() failed\n");
 122          exit(1);
 123       }
 124
 125       if (spe_program_load(cell_global.spe_contexts[i], &g3d_spu)) {
 126          fprintf(stderr, "spe_program_load() failed\n");
 127          exit(1);
 128       }
 129
 130       pthread_create(&cell_global.spe_threads[i], NULL, &cell_thread_function,
 131                      &cell_global.inits[i]);
 132    }
 133 }
 134
 135
 136 /**
 137  * Tell all the SPUs to stop/exit.
 138  */
 139 void
 140 cell_spu_exit(struct cell_context *cell)
 141 {
 142    uint i;
 143
 144    for (i = 0; i < cell->num_spus; i++) {
 145       send_mbox_message(cell_global.spe_contexts[i], CELL_CMD_EXIT);
 146    }
 147
 148    /* wait for threads to exit */
 149    for (i = 0; i < cell->num_spus; i++) {
 150       void *value;
 151       pthread_join(cell_global.spe_threads[i], &value);
 152       cell_global.spe_threads[i] = 0;
 153       cell_global.spe_contexts[i] = 0;
 154    }
 155 }