diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_upload_mgr.c')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_upload_mgr.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_upload_mgr.c b/mesalib/src/gallium/auxiliary/util/u_upload_mgr.c new file mode 100644 index 000000000..e2e7829fb --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_upload_mgr.c @@ -0,0 +1,251 @@ +/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * 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 VMWARE 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.
+ *
+ **************************************************************************/
+
+/* Helper utility for uploading user buffers & other data, and
+ * coalescing small buffers into larger ones.
+ */
+
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
+#include "pipe/p_context.h"
+#include "util/u_memory.h"
+#include "util/u_math.h"
+
+#include "u_upload_mgr.h"
+
+
+struct u_upload_mgr {
+ struct pipe_context *pipe;
+
+ unsigned default_size; /* Minimum size of the upload buffer, in bytes. */
+ unsigned alignment; /* Alignment of each sub-allocation. */
+ unsigned bind; /* Bitmask of PIPE_BIND_* flags. */
+
+ struct pipe_resource *buffer; /* Upload buffer. */
+ struct pipe_transfer *transfer; /* Transfer object for the upload buffer. */
+ uint8_t *map; /* Pointer to the mapped upload buffer. */
+ unsigned size; /* Actual size of the upload buffer. */
+ unsigned offset; /* Aligned offset to the upload buffer, pointing
+ * at the first unused byte. */
+};
+
+
+struct u_upload_mgr *u_upload_create( struct pipe_context *pipe,
+ unsigned default_size,
+ unsigned alignment,
+ unsigned bind )
+{
+ struct u_upload_mgr *upload = CALLOC_STRUCT( u_upload_mgr );
+ if (!upload)
+ return NULL;
+
+ upload->pipe = pipe;
+ upload->default_size = default_size;
+ upload->alignment = alignment;
+ upload->bind = bind;
+ upload->buffer = NULL;
+
+ return upload;
+}
+
+/* Release old buffer.
+ *
+ * This must usually be called prior to firing the command stream
+ * which references the upload buffer, as many memory managers will
+ * cause subsequent maps of a fired buffer to wait.
+ *
+ * Can improve this with a change to pipe_buffer_write to use the
+ * DONT_WAIT bit, but for now, it's easiest just to grab a new buffer.
+ */
+void u_upload_flush( struct u_upload_mgr *upload )
+{
+ /* Unmap and unreference the upload buffer. */
+ if (upload->transfer) {
+ if (upload->offset) {
+ pipe_buffer_flush_mapped_range(upload->pipe, upload->transfer,
+ 0, upload->offset);
+ }
+ pipe_transfer_unmap(upload->pipe, upload->transfer);
+ pipe_transfer_destroy(upload->pipe, upload->transfer);
+ upload->transfer = NULL;
+ }
+ pipe_resource_reference( &upload->buffer, NULL );
+ upload->size = 0;
+}
+
+
+void u_upload_destroy( struct u_upload_mgr *upload )
+{
+ u_upload_flush( upload );
+ FREE( upload );
+}
+
+
+static enum pipe_error
+u_upload_alloc_buffer( struct u_upload_mgr *upload,
+ unsigned min_size )
+{
+ unsigned size;
+
+ /* Release the old buffer, if present:
+ */
+ u_upload_flush( upload );
+
+ /* Allocate a new one:
+ */
+ size = align(MAX2(upload->default_size, min_size), 4096);
+
+ upload->buffer = pipe_buffer_create( upload->pipe->screen,
+ upload->bind,
+ PIPE_USAGE_STREAM,
+ size );
+ if (upload->buffer == NULL)
+ goto fail;
+
+ /* Map the new buffer. */
+ upload->map = pipe_buffer_map_range(upload->pipe, upload->buffer,
+ 0, size,
+ PIPE_TRANSFER_WRITE |
+ PIPE_TRANSFER_FLUSH_EXPLICIT,
+ &upload->transfer);
+
+ upload->size = size;
+
+ upload->offset = 0;
+ return 0;
+
+fail:
+ if (upload->buffer)
+ pipe_resource_reference( &upload->buffer, NULL );
+
+ return PIPE_ERROR_OUT_OF_MEMORY;
+}
+
+enum pipe_error u_upload_alloc( struct u_upload_mgr *upload,
+ unsigned min_out_offset,
+ unsigned size,
+ unsigned *out_offset,
+ struct pipe_resource **outbuf,
+ boolean *flushed,
+ void **ptr )
+{
+ unsigned alloc_size = align( size, upload->alignment );
+ unsigned alloc_offset = align(min_out_offset, upload->alignment);
+ unsigned offset;
+
+ /* Make sure we have enough space in the upload buffer
+ * for the sub-allocation. */
+ if (MAX2(upload->offset, alloc_offset) + alloc_size > upload->size) {
+ enum pipe_error ret = u_upload_alloc_buffer(upload,
+ alloc_offset + alloc_size);
+ if (ret)
+ return ret;
+
+ *flushed = TRUE;
+ } else {
+ *flushed = FALSE;
+ }
+
+ offset = MAX2(upload->offset, alloc_offset);
+
+ assert(offset < upload->buffer->width0);
+ assert(offset + size <= upload->buffer->width0);
+ assert(size);
+
+ /* Emit the return values: */
+ *ptr = upload->map + offset;
+ pipe_resource_reference( outbuf, upload->buffer );
+ *out_offset = offset;
+
+ upload->offset = offset + alloc_size;
+ return PIPE_OK;
+}
+
+enum pipe_error u_upload_data( struct u_upload_mgr *upload,
+ unsigned min_out_offset,
+ unsigned size,
+ const void *data,
+ unsigned *out_offset,
+ struct pipe_resource **outbuf,
+ boolean *flushed )
+{
+ uint8_t *ptr;
+ enum pipe_error ret = u_upload_alloc(upload, min_out_offset, size,
+ out_offset, outbuf, flushed,
+ (void**)&ptr);
+ if (ret)
+ return ret;
+
+ memcpy(ptr, data, size);
+ return PIPE_OK;
+}
+
+
+/* As above, but upload the full contents of a buffer. Useful for
+ * uploading user buffers, avoids generating an explosion of GPU
+ * buffers if you have an app that does lots of small vertex buffer
+ * renders or DrawElements calls.
+ */
+enum pipe_error u_upload_buffer( struct u_upload_mgr *upload,
+ unsigned min_out_offset,
+ unsigned offset,
+ unsigned size,
+ struct pipe_resource *inbuf,
+ unsigned *out_offset,
+ struct pipe_resource **outbuf,
+ boolean *flushed )
+{
+ enum pipe_error ret = PIPE_OK;
+ struct pipe_transfer *transfer = NULL;
+ const char *map = NULL;
+
+ map = (const char *)pipe_buffer_map(upload->pipe,
+ inbuf,
+ PIPE_TRANSFER_READ,
+ &transfer);
+
+ if (map == NULL) {
+ ret = PIPE_ERROR_OUT_OF_MEMORY;
+ goto done;
+ }
+
+ if (0)
+ debug_printf("upload ptr %p ofs %d sz %d\n", map, offset, size);
+
+ ret = u_upload_data( upload,
+ min_out_offset,
+ size,
+ map + offset,
+ out_offset,
+ outbuf, flushed );
+
+done:
+ if (map)
+ pipe_buffer_unmap( upload->pipe, transfer );
+
+ return ret;
+}
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