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/**************************************************************************
*
* 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;
}
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