Cell: initial work for a hw-like batch buffer system

1 files changed, 85 insertions, 0 deletions

diff --git a/src/mesa/pipe/cell/ppu/cell_batch.c b/src/mesa/pipe/cell/ppu/cell_batch.c
new file mode 100644
index 0000000000..a71573cbf7
--- /dev/null
+++ b/src/mesa/pipe/cell/ppu/cell_batch.c
@@ -0,0 +1,85 @@
+/**************************************************************************
+ * 
+ * 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)
+{
+   const uint batch = cell->cur_batch;
+   const uint size = cell->batch_buffer_size[batch];
+   uint i, cmd_word;
+
+   if (size == 0)
+      return;
+
+   assert(batch < CELL_NUM_BATCH_BUFFERS);
+
+   printf("cell_batch_dispatch: buf %u, size %u\n", batch, size);
+          
+   cmd_word = CELL_CMD_BATCH | (batch << 8) | (size << 16);
+
+   for (i = 0; i < cell->num_spus; i++) {
+      send_mbox_message(cell_global.spe_contexts[i], cmd_word);
+   }
+
+   /* XXX wait on DMA xfer of prev buffer to complete */
+
+   cell->cur_batch = (batch + 1) % CELL_NUM_BATCH_BUFFERS;
+
+   cell->batch_buffer_size[cell->cur_batch] = 0;  /* empty */
+}
+
+
+/**
+ * \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(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;
+}