Mesa (gallium-0.2): cell: implement fencing for texture buffers
Brian Paul
brianp at kemper.freedesktop.org
Wed Oct 22 17:15:51 UTC 2008
Module: Mesa
Branch: gallium-0.2
Commit: 70dd4379d2cd54f229c3940312537912470218d3
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=70dd4379d2cd54f229c3940312537912470218d3
Author: Brian Paul <brian.paul at tungstengraphics.com>
Date: Wed Oct 22 10:34:13 2008 -0600
cell: implement fencing for texture buffers
If we delete a texture, we need to keep the underlying tiled data buffer
around until any rendering that references it has completed.
Keep a list of buffers referenced by a rendering batch. Unref/free them when
the associated batch's fence is executed/signalled.
---
src/gallium/drivers/cell/common.h | 25 ++++
src/gallium/drivers/cell/ppu/Makefile | 1 +
src/gallium/drivers/cell/ppu/cell_batch.c | 32 +++++
src/gallium/drivers/cell/ppu/cell_context.c | 6 +
src/gallium/drivers/cell/ppu/cell_context.h | 21 +++
src/gallium/drivers/cell/ppu/cell_fence.c | 158 ++++++++++++++++++++++++
src/gallium/drivers/cell/ppu/cell_fence.h | 57 +++++++++
src/gallium/drivers/cell/ppu/cell_state_emit.c | 2 +-
src/gallium/drivers/cell/ppu/cell_texture.c | 33 +++--
src/gallium/drivers/cell/ppu/cell_texture.h | 5 +-
src/gallium/drivers/cell/ppu/cell_vbuf.c | 6 +
src/gallium/drivers/cell/spu/spu_command.c | 38 +++++-
src/gallium/drivers/cell/spu/spu_main.h | 2 +-
13 files changed, 367 insertions(+), 19 deletions(-)
diff --git a/src/gallium/drivers/cell/common.h b/src/gallium/drivers/cell/common.h
index 9ca4e9d..23fb0b0 100644
--- a/src/gallium/drivers/cell/common.h
+++ b/src/gallium/drivers/cell/common.h
@@ -102,6 +102,8 @@
#define CELL_CMD_STATE_RASTERIZER 22
#define CELL_CMD_VS_EXECUTE 23
#define CELL_CMD_FLUSH_BUFFER_RANGE 24
+#define CELL_CMD_FENCE 25
+
/** Command/batch buffers */
#define CELL_NUM_BUFFERS 4
@@ -123,6 +125,29 @@
#define SPU_MAX_FRAGMENT_OPS_INSTS 64
+
+#define CELL_FENCE_IDLE 0
+#define CELL_FENCE_EMITTED 1
+#define CELL_FENCE_SIGNALLED 2
+
+struct cell_fence
+{
+ /** There's a 16-byte status qword per SPU */
+ volatile uint status[CELL_MAX_SPUS][4];
+};
+
+
+/**
+ * Fence command sent to SPUs. In response, the SPUs will write
+ * CELL_FENCE_STATUS_SIGNALLED back to the fence status word in main memory.
+ */
+struct cell_command_fence
+{
+ uint64_t opcode; /**< CELL_CMD_FENCE */
+ struct cell_fence *fence;
+};
+
+
/**
* Command to specify per-fragment operations state and generated code.
* Note that the dsa, blend, blend_color fields are really only needed
diff --git a/src/gallium/drivers/cell/ppu/Makefile b/src/gallium/drivers/cell/ppu/Makefile
index b28f4c5..9358a47 100644
--- a/src/gallium/drivers/cell/ppu/Makefile
+++ b/src/gallium/drivers/cell/ppu/Makefile
@@ -24,6 +24,7 @@ SOURCES = \
cell_clear.c \
cell_context.c \
cell_draw_arrays.c \
+ cell_fence.c \
cell_flush.c \
cell_gen_fragment.c \
cell_gen_fp.c \
diff --git a/src/gallium/drivers/cell/ppu/cell_batch.c b/src/gallium/drivers/cell/ppu/cell_batch.c
index 01254ae..448b723 100644
--- a/src/gallium/drivers/cell/ppu/cell_batch.c
+++ b/src/gallium/drivers/cell/ppu/cell_batch.c
@@ -28,6 +28,7 @@
#include "cell_context.h"
#include "cell_batch.h"
+#include "cell_fence.h"
#include "cell_spu.h"
@@ -63,6 +64,10 @@ cell_get_empty_buffer(struct cell_context *cell)
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;
}
}
@@ -85,6 +90,26 @@ cell_get_empty_buffer(struct cell_context *cell)
/**
+ * 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;
+
+ 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 = &cell->fenced_buffers[batch].fence;
+}
+
+
+/**
* 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.
@@ -102,6 +127,12 @@ cell_batch_flush(struct cell_context *cell)
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);
+
flushing = TRUE;
assert(batch < CELL_NUM_BUFFERS);
@@ -142,6 +173,7 @@ 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;
}
diff --git a/src/gallium/drivers/cell/ppu/cell_context.c b/src/gallium/drivers/cell/ppu/cell_context.c
index 7a2d93e..22d552d 100644
--- a/src/gallium/drivers/cell/ppu/cell_context.c
+++ b/src/gallium/drivers/cell/ppu/cell_context.c
@@ -47,6 +47,7 @@
#include "cell_clear.h"
#include "cell_context.h"
#include "cell_draw_arrays.h"
+#include "cell_fence.h"
#include "cell_flush.h"
#include "cell_state.h"
#include "cell_surface.h"
@@ -104,6 +105,7 @@ cell_create_context(struct pipe_screen *screen,
struct cell_winsys *cws)
{
struct cell_context *cell;
+ uint i;
/* some fields need to be 16-byte aligned, so align the whole object */
cell = (struct cell_context*) align_malloc(sizeof(struct cell_context), 16);
@@ -151,6 +153,10 @@ cell_create_context(struct pipe_screen *screen,
cell_debug_flags,
0 );
+ for (i = 0; i < CELL_NUM_BUFFERS; i++)
+ cell_fence_init(&cell->fenced_buffers[i].fence);
+
+
/*
* SPU stuff
*/
diff --git a/src/gallium/drivers/cell/ppu/cell_context.h b/src/gallium/drivers/cell/ppu/cell_context.h
index ad1f482..4491ae8 100644
--- a/src/gallium/drivers/cell/ppu/cell_context.h
+++ b/src/gallium/drivers/cell/ppu/cell_context.h
@@ -81,6 +81,19 @@ struct cell_fragment_ops_key
};
+struct cell_buffer_node;
+
+/**
+ * Fenced buffer list. List of buffers which can be unreferenced after
+ * the fence has been executed/signalled.
+ */
+struct cell_buffer_list
+{
+ struct cell_fence fence;
+ struct cell_buffer_node *head;
+};
+
+
/**
* Per-context state, subclass of pipe_context.
*/
@@ -154,6 +167,14 @@ struct cell_context
uint buffer_status[CELL_MAX_SPUS][CELL_NUM_BUFFERS][4] ALIGN16_ATTRIB;
+ /** Associated with each command/batch buffer is a list of pipe_buffers
+ * that are fenced. When the last command in a buffer is executed, the
+ * fence will be signalled, indicating that any pipe_buffers preceeding
+ * that fence can be unreferenced (and probably freed).
+ */
+ struct cell_buffer_list fenced_buffers[CELL_NUM_BUFFERS];
+
+
struct spe_function attrib_fetch;
unsigned attrib_fetch_offsets[PIPE_MAX_ATTRIBS];
diff --git a/src/gallium/drivers/cell/ppu/cell_fence.c b/src/gallium/drivers/cell/ppu/cell_fence.c
new file mode 100644
index 0000000..ffb3bea
--- /dev/null
+++ b/src/gallium/drivers/cell/ppu/cell_fence.c
@@ -0,0 +1,158 @@
+/**************************************************************************
+ *
+ * Copyright 2008 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 <unistd.h>
+#include "util/u_memory.h"
+#include "pipe/p_inlines.h"
+#include "cell_context.h"
+#include "cell_batch.h"
+#include "cell_fence.h"
+#include "cell_texture.h"
+
+
+void
+cell_fence_init(struct cell_fence *fence)
+{
+ uint i;
+ for (i = 0; i < CELL_MAX_SPUS; i++) {
+ fence->status[i][0] = CELL_FENCE_IDLE;
+ }
+}
+
+
+boolean
+cell_fence_signalled(const struct cell_context *cell,
+ const struct cell_fence *fence)
+{
+ uint i;
+ for (i = 0; i < cell->num_spus; i++) {
+ //ASSERT(fence->status[i][0] != CELL_FENCE_IDLE);
+ if (fence->status[i][0] == CELL_FENCE_EMITTED)
+ return FALSE;
+ }
+ return TRUE;
+}
+
+
+void
+cell_fence_finish(const struct cell_context *cell,
+ const struct cell_fence *fence)
+{
+ while (!cell_fence_signalled(cell, fence)) {
+ usleep(10);
+ }
+}
+
+
+
+
+struct cell_buffer_node
+{
+ struct pipe_buffer *buffer;
+ struct cell_buffer_node *next;
+};
+
+
+static void
+cell_add_buffer_to_list(struct cell_context *cell,
+ struct cell_buffer_list *list,
+ struct pipe_buffer *buffer)
+{
+ struct pipe_screen *ps = cell->pipe.screen;
+ struct cell_buffer_node *node = CALLOC_STRUCT(cell_buffer_node);
+ /* create new list node which references the buffer, insert at head */
+ if (node) {
+ pipe_buffer_reference(ps, &node->buffer, buffer);
+ node->next = list->head;
+ list->head = node;
+ }
+}
+
+
+/**
+ * Wait for completion of the given fence, then unreference any buffers
+ * on the list.
+ * This typically unrefs/frees texture buffers after any rendering which uses
+ * them has completed.
+ */
+void
+cell_free_fenced_buffers(struct cell_context *cell,
+ struct cell_buffer_list *list)
+{
+ if (list->head) {
+ struct pipe_screen *ps = cell->pipe.screen;
+ struct cell_buffer_node *node;
+
+ cell_fence_finish(cell, &list->fence);
+
+ /* traverse the list, unreferencing buffers, freeing nodes */
+ node = list->head;
+ while (node) {
+ struct cell_buffer_node *next = node->next;
+ assert(node->buffer);
+ pipe_buffer_unmap(ps, node->buffer);
+#if 0
+ printf("Unref buffer %p\n", node->buffer);
+ if (node->buffer->refcount == 1)
+ printf(" Delete!\n");
+#endif
+ pipe_buffer_reference(ps, &node->buffer, NULL);
+ FREE(node);
+ node = next;
+ }
+ list->head = NULL;
+ }
+}
+
+
+/**
+ * This should be called for each render command.
+ * Any texture buffers that are current bound will be added to a fenced
+ * list to be freed later when the fence is executed/signalled.
+ */
+void
+cell_add_fenced_textures(struct cell_context *cell)
+{
+ struct cell_buffer_list *list = &cell->fenced_buffers[cell->cur_batch];
+ uint i;
+
+ for (i = 0; i < cell->num_textures; i++) {
+ struct cell_texture *ct = cell->texture[i];
+ if (ct) {
+ uint level;
+ for (level = 0; level < CELL_MAX_TEXTURE_LEVELS; level++) {
+ if (ct->tiled_buffer[level]) {
+#if 0
+ printf("Adding texture %p buffer %p to list\n",
+ ct, ct->tiled_buffer[level]);
+#endif
+ cell_add_buffer_to_list(cell, list, ct->tiled_buffer[level]);
+ }
+ }
+ }
+ }
+}
diff --git a/src/gallium/drivers/cell/ppu/cell_fence.h b/src/gallium/drivers/cell/ppu/cell_fence.h
new file mode 100644
index 0000000..536b4ba
--- /dev/null
+++ b/src/gallium/drivers/cell/ppu/cell_fence.h
@@ -0,0 +1,57 @@
+/**************************************************************************
+ *
+ * Copyright 2008 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.
+ *
+ **************************************************************************/
+
+
+#ifndef CELL_FENCE_H
+#define CELL_FENCE_H
+
+
+extern void
+cell_fence_init(struct cell_fence *fence);
+
+
+extern boolean
+cell_fence_signalled(const struct cell_context *cell,
+ const struct cell_fence *fence);
+
+
+extern void
+cell_fence_finish(const struct cell_context *cell,
+ const struct cell_fence *fence);
+
+
+
+extern void
+cell_free_fenced_buffers(struct cell_context *cell,
+ struct cell_buffer_list *list);
+
+
+extern void
+cell_add_fenced_textures(struct cell_context *cell);
+
+
+#endif /* CELL_FENCE_H */
diff --git a/src/gallium/drivers/cell/ppu/cell_state_emit.c b/src/gallium/drivers/cell/ppu/cell_state_emit.c
index effcd2a..dd2d7f7 100644
--- a/src/gallium/drivers/cell/ppu/cell_state_emit.c
+++ b/src/gallium/drivers/cell/ppu/cell_state_emit.c
@@ -225,7 +225,7 @@ cell_emit_state(struct cell_context *cell)
if (cell->texture[i]) {
uint level;
for (level = 0; level < CELL_MAX_TEXTURE_LEVELS; level++) {
- texture->start[level] = cell->texture[i]->tiled_data[level];
+ texture->start[level] = cell->texture[i]->tiled_mapped[level];
texture->width[level] = cell->texture[i]->base.width[level];
texture->height[level] = cell->texture[i]->base.height[level];
texture->depth[level] = cell->texture[i]->base.depth[level];
diff --git a/src/gallium/drivers/cell/ppu/cell_texture.c b/src/gallium/drivers/cell/ppu/cell_texture.c
index 9c6741f..9ac2f3b 100644
--- a/src/gallium/drivers/cell/ppu/cell_texture.c
+++ b/src/gallium/drivers/cell/ppu/cell_texture.c
@@ -136,6 +136,9 @@ cell_texture_release(struct pipe_screen *screen,
__FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
*/
if (--(*pt)->refcount <= 0) {
+ /* Delete this texture now.
+ * But note that the underlying pipe_buffer may linger...
+ */
struct cell_texture *ct = cell_texture(*pt);
uint i;
@@ -146,14 +149,12 @@ cell_texture_release(struct pipe_screen *screen,
pipe_buffer_reference(screen, &ct->buffer, NULL);
for (i = 0; i < CELL_MAX_TEXTURE_LEVELS; i++) {
- if (ct->tiled_data[i]) {
- /* XXX need to use a fenced buffer for tiled data so that
- * it's properly freed after rendering has completed.
- * Disabling this free() allows glDrawPixels to work for now.
- */
-#if 0
- align_free(ct->tiled_data[i]);
-#endif
+ /* Unreference the tiled image buffer.
+ * It may not actually be deleted until a fence is hit.
+ */
+ if (ct->tiled_buffer[i]) {
+ ct->tiled_mapped[i] = NULL;
+ winsys_buffer_reference(screen->winsys, &ct->tiled_buffer[i], NULL);
}
}
@@ -234,12 +235,18 @@ cell_twiddle_texture(struct pipe_screen *screen,
int offset = bufWidth * bufHeight * 4 * surface->face;
uint *dst;
- if (!ct->tiled_data[level]) {
- ct->tiled_data[level] =
- align_malloc(bufWidth * bufHeight * 4 * numFaces, 16);
+ if (!ct->tiled_buffer[level]) {
+ /* allocate buffer for tiled data now */
+ struct pipe_winsys *ws = screen->winsys;
+ uint bytes = bufWidth * bufHeight * 4 * numFaces;
+ ct->tiled_buffer[level] = ws->buffer_create(ws, 16,
+ PIPE_BUFFER_USAGE_PIXEL,
+ bytes);
+ /* and map it */
+ ct->tiled_mapped[level] = ws->buffer_map(ws, ct->tiled_buffer[level],
+ PIPE_BUFFER_USAGE_GPU_READ);
}
-
- dst = (uint *) ((ubyte *) ct->tiled_data[level] + offset);
+ dst = (uint *) ((ubyte *) ct->tiled_mapped[level] + offset);
twiddle_image_uint(texWidth, texHeight, TILE_SIZE, dst,
surface->stride, src);
diff --git a/src/gallium/drivers/cell/ppu/cell_texture.h b/src/gallium/drivers/cell/ppu/cell_texture.h
index a075709..2f5fe0d 100644
--- a/src/gallium/drivers/cell/ppu/cell_texture.h
+++ b/src/gallium/drivers/cell/ppu/cell_texture.h
@@ -48,7 +48,10 @@ struct cell_texture
struct pipe_buffer *buffer;
unsigned long buffer_size;
- void *tiled_data[CELL_MAX_TEXTURE_LEVELS]; /* XXX this may be temporary */ /*ALIGN16*/
+ /** Texture data in tiled layout is held here */
+ struct pipe_buffer *tiled_buffer[CELL_MAX_TEXTURE_LEVELS];
+ /** Mapped, tiled texture data */
+ void *tiled_mapped[CELL_MAX_TEXTURE_LEVELS];
};
diff --git a/src/gallium/drivers/cell/ppu/cell_vbuf.c b/src/gallium/drivers/cell/ppu/cell_vbuf.c
index aa63435..65ba51b 100644
--- a/src/gallium/drivers/cell/ppu/cell_vbuf.c
+++ b/src/gallium/drivers/cell/ppu/cell_vbuf.c
@@ -38,6 +38,7 @@
#include "cell_batch.h"
#include "cell_context.h"
+#include "cell_fence.h"
#include "cell_flush.h"
#include "cell_spu.h"
#include "cell_vbuf.h"
@@ -108,6 +109,11 @@ cell_vbuf_release_vertices(struct vbuf_render *vbr, void *vertices,
__FUNCTION__, cvbr->vertex_buf, vertices_used);
*/
+ /* Make sure texture buffers aren't released until we're done rendering
+ * with them.
+ */
+ cell_add_fenced_textures(cell);
+
/* Tell SPUs they can release the vert buf */
if (cvbr->vertex_buf != ~0U) {
struct cell_command_release_verts *release
diff --git a/src/gallium/drivers/cell/spu/spu_command.c b/src/gallium/drivers/cell/spu/spu_command.c
index 9c853c0..a6ed29e 100644
--- a/src/gallium/drivers/cell/spu/spu_command.c
+++ b/src/gallium/drivers/cell/spu/spu_command.c
@@ -76,9 +76,10 @@ static void
release_buffer(uint buffer)
{
/* Evidently, using less than a 16-byte status doesn't work reliably */
- static const uint status[4] ALIGN16_ATTRIB
- = {CELL_BUFFER_STATUS_FREE, 0, 0, 0};
-
+ static const vector unsigned int status = {CELL_BUFFER_STATUS_FREE,
+ CELL_BUFFER_STATUS_FREE,
+ CELL_BUFFER_STATUS_FREE,
+ CELL_BUFFER_STATUS_FREE};
const uint index = 4 * (spu.init.id * CELL_NUM_BUFFERS + buffer);
uint *dst = spu.init.buffer_status + index;
@@ -93,6 +94,29 @@ release_buffer(uint buffer)
}
+/**
+ * Write CELL_FENCE_SIGNALLED back to the fence status qword in main memory.
+ * There's a qword of status per SPU.
+ */
+static void
+cmd_fence(struct cell_command_fence *fence_cmd)
+{
+ static const vector unsigned int status = {CELL_FENCE_SIGNALLED,
+ CELL_FENCE_SIGNALLED,
+ CELL_FENCE_SIGNALLED,
+ CELL_FENCE_SIGNALLED};
+ uint *dst = (uint *) fence_cmd->fence;
+ dst += 4 * spu.init.id; /* main store/memory address, not local store */
+
+ mfc_put((void *) &status, /* src in local memory */
+ (unsigned int) dst, /* dst in main memory */
+ sizeof(status), /* size */
+ TAG_FENCE, /* tag */
+ 0, /* tid */
+ 0 /* rid */);
+}
+
+
static void
cmd_clear_surface(const struct cell_command_clear_surface *clear)
{
@@ -637,6 +661,14 @@ cmd_batch(uint opcode)
cmd_finish();
pos += 1;
break;
+ case CELL_CMD_FENCE:
+ {
+ struct cell_command_fence *fence_cmd =
+ (struct cell_command_fence *) &buffer[pos];
+ cmd_fence(fence_cmd);
+ pos += sizeof(*fence_cmd) / 8;
+ }
+ break;
case CELL_CMD_RELEASE_VERTS:
{
struct cell_command_release_verts *release
diff --git a/src/gallium/drivers/cell/spu/spu_main.h b/src/gallium/drivers/cell/spu/spu_main.h
index 95ef4c9..668af10 100644
--- a/src/gallium/drivers/cell/spu/spu_main.h
+++ b/src/gallium/drivers/cell/spu/spu_main.h
@@ -210,7 +210,7 @@ extern struct spu_global spu;
#define TAG_DCACHE1 21
#define TAG_DCACHE2 22
#define TAG_DCACHE3 23
-
+#define TAG_FENCE 24
static INLINE void
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