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-rw-r--r--src/gallium/drivers/cell/ppu/cell_batch.c315
1 files changed, 315 insertions, 0 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_batch.c b/src/gallium/drivers/cell/ppu/cell_batch.c
new file mode 100644
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+++ b/src/gallium/drivers/cell/ppu/cell_batch.c
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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_fence.h"
+#include "cell_spu.h"
+
+
+
+/**
+ * Search the buffer pool for an empty/free buffer and return its index.
+ * Buffers are used for storing vertex data, state and commands which
+ * will be sent to the SPUs.
+ * If no empty buffers are available, wait for one.
+ * \return buffer index in [0, CELL_NUM_BUFFERS-1]
+ */
+uint
+cell_get_empty_buffer(struct cell_context *cell)
+{
+ static uint prev_buffer = 0;
+ uint buf = (prev_buffer + 1) % CELL_NUM_BUFFERS;
+ uint tries = 0;
+
+ /* Find a buffer that's marked as free by all SPUs */
+ while (1) {
+ uint spu, num_free = 0;
+
+ for (spu = 0; spu < cell->num_spus; spu++) {
+ if (cell->buffer_status[spu][buf][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][buf][0] = CELL_BUFFER_STATUS_USED;
+ }
+ /*
+ printf("PPU: ALLOC BUFFER %u, %u tries\n", buf, tries);
+ */
+ prev_buffer = buf;
+
+ /* release tex buffer associated w/ prev use of this batch buf */
+ cell_free_fenced_buffers(cell, &cell->fenced_buffers[buf]);
+
+ return buf;
+ }
+ }
+ else {
+ break;
+ }
+ }
+
+ /* try next buf */
+ buf = (buf + 1) % CELL_NUM_BUFFERS;
+
+ tries++;
+ if (tries == 100) {
+ /*
+ printf("PPU WAITING for buffer...\n");
+ */
+ }
+ }
+}
+
+
+/**
+ * Append a fence command to the current batch buffer.
+ * Note that we're sure there's always room for this because of the
+ * adjusted size check in cell_batch_free_space().
+ */
+static void
+emit_fence(struct cell_context *cell)
+{
+ const uint batch = cell->cur_batch;
+ const uint size = cell->buffer_size[batch];
+ struct cell_command_fence *fence_cmd;
+ struct cell_fence *fence = &cell->fenced_buffers[batch].fence;
+ uint i;
+
+ /* set fence status to emitted, not yet signalled */
+ for (i = 0; i < cell->num_spus; i++) {
+ fence->status[i][0] = CELL_FENCE_EMITTED;
+ }
+
+ ASSERT(size + sizeof(struct cell_command_fence) <= CELL_BUFFER_SIZE);
+
+ fence_cmd = (struct cell_command_fence *) (cell->buffer[batch] + size);
+ fence_cmd->opcode = CELL_CMD_FENCE;
+ fence_cmd->fence = fence;
+
+ /* update batch buffer size */
+ cell->buffer_size[batch] = size + sizeof(struct cell_command_fence);
+ assert(sizeof(struct cell_command_fence) % 8 == 0);
+}
+
+
+/**
+ * Flush the current batch buffer to the SPUs.
+ * An empty buffer will be found and set as the new current batch buffer
+ * for subsequent commands/data.
+ */
+void
+cell_batch_flush(struct cell_context *cell)
+{
+ static boolean flushing = FALSE;
+ uint batch = cell->cur_batch;
+ uint size = cell->buffer_size[batch];
+ uint spu, cmd_word;
+
+ assert(!flushing);
+
+ if (size == 0)
+ return;
+
+ /* Before we use this batch buffer, make sure any fenced texture buffers
+ * are released.
+ */
+ if (cell->fenced_buffers[batch].head) {
+ emit_fence(cell);
+ size = cell->buffer_size[batch];
+ }
+
+ flushing = TRUE;
+
+ assert(batch < CELL_NUM_BUFFERS);
+
+ /*
+ printf("cell_batch_dispatch: buf %u at %p, size %u\n",
+ batch, &cell->buffer[batch][0], size);
+ */
+
+ /*
+ * Build "BATCH" command and send 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.
+ */
+
+ batch = cell_get_empty_buffer(cell);
+
+ cell->buffer_size[batch] = 0; /* empty */
+ cell->cur_batch = batch;
+
+ flushing = FALSE;
+}
+
+
+/**
+ * Return the number of bytes free in the current batch buffer.
+ */
+uint
+cell_batch_free_space(const struct cell_context *cell)
+{
+ uint free = CELL_BUFFER_SIZE - cell->buffer_size[cell->cur_batch];
+ free -= sizeof(struct cell_command_fence);
+ return free;
+}
+
+
+/**
+ * Append data to the current batch buffer.
+ * \param data address of block of bytes to append
+ * \param bytes size of block of bytes
+ */
+void
+cell_batch_append(struct cell_context *cell, const void *data, uint bytes)
+{
+ uint size;
+
+ ASSERT(bytes % 8 == 0);
+ ASSERT(bytes <= CELL_BUFFER_SIZE);
+ ASSERT(cell->cur_batch >= 0);
+
+#ifdef ASSERT
+ {
+ uint spu;
+ for (spu = 0; spu < cell->num_spus; spu++) {
+ ASSERT(cell->buffer_status[spu][cell->cur_batch][0]
+ == CELL_BUFFER_STATUS_USED);
+ }
+ }
+#endif
+
+ size = cell->buffer_size[cell->cur_batch];
+
+ if (bytes > cell_batch_free_space(cell)) {
+ cell_batch_flush(cell);
+ size = 0;
+ }
+
+ ASSERT(size + bytes <= CELL_BUFFER_SIZE);
+
+ memcpy(cell->buffer[cell->cur_batch] + size, data, bytes);
+
+ cell->buffer_size[cell->cur_batch] = size + bytes;
+}
+
+
+/**
+ * Allocate space in the current batch buffer for 'bytes' space.
+ * \return address in batch buffer to put data
+ */
+void *
+cell_batch_alloc(struct cell_context *cell, uint bytes)
+{
+ return cell_batch_alloc_aligned(cell, bytes, 1);
+}
+
+
+/**
+ * Same as \sa cell_batch_alloc, but return an address at a particular
+ * alignment.
+ */
+void *
+cell_batch_alloc_aligned(struct cell_context *cell, uint bytes,
+ uint alignment)
+{
+ void *pos;
+ uint size, padbytes;
+
+ ASSERT(bytes % 8 == 0);
+ ASSERT(bytes <= CELL_BUFFER_SIZE);
+ ASSERT(alignment > 0);
+ ASSERT(cell->cur_batch >= 0);
+
+#ifdef ASSERT
+ {
+ uint spu;
+ for (spu = 0; spu < cell->num_spus; spu++) {
+ ASSERT(cell->buffer_status[spu][cell->cur_batch][0]
+ == CELL_BUFFER_STATUS_USED);
+ }
+ }
+#endif
+
+ size = cell->buffer_size[cell->cur_batch];
+
+ padbytes = (alignment - (size % alignment)) % alignment;
+
+ if (padbytes + bytes > cell_batch_free_space(cell)) {
+ cell_batch_flush(cell);
+ size = 0;
+ }
+ else {
+ size += padbytes;
+ }
+
+ ASSERT(size % alignment == 0);
+ ASSERT(size + bytes <= CELL_BUFFER_SIZE);
+
+ pos = (void *) (cell->buffer[cell->cur_batch] + size);
+
+ cell->buffer_size[cell->cur_batch] = size + bytes;
+
+ return pos;
+}
+
+
+/**
+ * One-time init of batch buffers.
+ */
+void
+cell_init_batch_buffers(struct cell_context *cell)
+{
+ uint spu, buf;
+
+ /* init command, vertex/index buffer info */
+ for (buf = 0; buf < CELL_NUM_BUFFERS; buf++) {
+ cell->buffer_size[buf] = 0;
+
+ /* init batch buffer status values,
+ * mark 0th buffer as used, rest as free.
+ */
+ for (spu = 0; spu < cell->num_spus; spu++) {
+ if (buf == 0)
+ cell->buffer_status[spu][buf][0] = CELL_BUFFER_STATUS_USED;
+ else
+ cell->buffer_status[spu][buf][0] = CELL_BUFFER_STATUS_FREE;
+ }
+ }
+}