--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * A variation of malloc buffers which get transferred to real graphics memory
+ * when there is an attempt to validate them.
+ *
+ * @author Jose Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+
+#include "pipe/p_debug.h"
+#include "util/u_memory.h"
+#include "pb_buffer.h"
+#include "pb_bufmgr.h"
+
+
+struct pb_ondemand_manager;
+
+
+struct pb_ondemand_buffer
+{
+ struct pb_buffer base;
+
+ struct pb_ondemand_manager *mgr;
+
+ /** Regular malloc'ed memory */
+ void *data;
+ unsigned mapcount;
+
+ /** Real buffer */
+ struct pb_buffer *buffer;
+ size_t size;
+ struct pb_desc desc;
+};
+
+
+struct pb_ondemand_manager
+{
+ struct pb_manager base;
+
+ struct pb_manager *provider;
+};
+
+
+extern const struct pb_vtbl pb_ondemand_buffer_vtbl;
+
+static INLINE struct pb_ondemand_buffer *
+pb_ondemand_buffer(struct pb_buffer *buf)
+{
+ assert(buf);
+ assert(buf->vtbl == &pb_ondemand_buffer_vtbl);
+ return (struct pb_ondemand_buffer *)buf;
+}
+
+static INLINE struct pb_ondemand_manager *
+pb_ondemand_manager(struct pb_manager *mgr)
+{
+ assert(mgr);
+ return (struct pb_ondemand_manager *)mgr;
+}
+
+
+static void
+pb_ondemand_buffer_destroy(struct pb_buffer *_buf)
+{
+ struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
+
+ pb_reference(&buf->buffer, NULL);
+
+ align_free(buf->data);
+
+ FREE(buf);
+}
+
+
+static void *
+pb_ondemand_buffer_map(struct pb_buffer *_buf,
+ unsigned flags)
+{
+ struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
+
+ if(buf->buffer) {
+ assert(!buf->data);
+ return pb_map(buf->buffer, flags);
+ }
+ else {
+ assert(buf->data);
+ ++buf->mapcount;
+ return buf->data;
+ }
+}
+
+
+static void
+pb_ondemand_buffer_unmap(struct pb_buffer *_buf)
+{
+ struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
+
+ if(buf->buffer) {
+ assert(!buf->data);
+ pb_unmap(buf->buffer);
+ }
+ else {
+ assert(buf->data);
+ assert(buf->mapcount);
+ if(buf->mapcount)
+ --buf->mapcount;
+ }
+}
+
+
+static enum pipe_error
+pb_ondemand_buffer_instantiate(struct pb_ondemand_buffer *buf)
+{
+ if(!buf->buffer) {
+ struct pb_manager *provider = buf->mgr->provider;
+ uint8_t *map;
+
+ assert(!buf->mapcount);
+
+ buf->buffer = provider->create_buffer(provider, buf->size, &buf->desc);
+ if(!buf->buffer)
+ return PIPE_ERROR_OUT_OF_MEMORY;
+
+ map = pb_map(buf->buffer, PIPE_BUFFER_USAGE_CPU_READ);
+ if(!map) {
+ pb_reference(&buf->buffer, NULL);
+ return PIPE_ERROR;
+ }
+
+ memcpy(map, buf->data, buf->size);
+
+ pb_unmap(buf->buffer);
+
+ if(!buf->mapcount) {
+ FREE(buf->data);
+ buf->data = NULL;
+ }
+ }
+
+ return PIPE_OK;
+}
+
+static enum pipe_error
+pb_ondemand_buffer_validate(struct pb_buffer *_buf,
+ struct pb_validate *vl,
+ unsigned flags)
+{
+ struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
+ enum pipe_error ret;
+
+ assert(!buf->mapcount);
+ if(buf->mapcount)
+ return PIPE_ERROR;
+
+ ret = pb_ondemand_buffer_instantiate(buf);
+ if(ret != PIPE_OK)
+ return ret;
+
+ return pb_validate(buf->buffer, vl, flags);
+}
+
+
+static void
+pb_ondemand_buffer_fence(struct pb_buffer *_buf,
+ struct pipe_fence_handle *fence)
+{
+ struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
+
+ assert(buf->buffer);
+ if(!buf->buffer)
+ return;
+
+ pb_fence(buf->buffer, fence);
+}
+
+
+static void
+pb_ondemand_buffer_get_base_buffer(struct pb_buffer *_buf,
+ struct pb_buffer **base_buf,
+ unsigned *offset)
+{
+ struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
+
+ if(pb_ondemand_buffer_instantiate(buf) != PIPE_OK) {
+ assert(0);
+ *base_buf = &buf->base;
+ *offset = 0;
+ return;
+ }
+
+ pb_get_base_buffer(buf->buffer, base_buf, offset);
+}
+
+
+const struct pb_vtbl
+pb_ondemand_buffer_vtbl = {
+ pb_ondemand_buffer_destroy,
+ pb_ondemand_buffer_map,
+ pb_ondemand_buffer_unmap,
+ pb_ondemand_buffer_validate,
+ pb_ondemand_buffer_fence,
+ pb_ondemand_buffer_get_base_buffer
+};
+
+
+static struct pb_buffer *
+pb_ondemand_manager_create_buffer(struct pb_manager *_mgr,
+ size_t size,
+ const struct pb_desc *desc)
+{
+ struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
+ struct pb_ondemand_buffer *buf;
+
+ buf = CALLOC_STRUCT(pb_ondemand_buffer);
+ if(!buf)
+ return NULL;
+
+ buf->base.base.refcount = 1;
+ buf->base.base.alignment = desc->alignment;
+ buf->base.base.usage = desc->usage;
+ buf->base.base.size = size;
+ buf->base.vtbl = &pb_ondemand_buffer_vtbl;
+
+ buf->mgr = mgr;
+
+ buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
+ if(!buf->data) {
+ FREE(buf);
+ return NULL;
+ }
+
+ buf->size = size;
+ buf->desc = *desc;
+
+ return &buf->base;
+}
+
+
+static void
+pb_ondemand_manager_flush(struct pb_manager *_mgr)
+{
+ struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
+
+ mgr->provider->flush(mgr->provider);
+}
+
+
+static void
+pb_ondemand_manager_destroy(struct pb_manager *_mgr)
+{
+ struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
+
+ FREE(mgr);
+}
+
+
+struct pb_manager *
+pb_ondemand_manager_create(struct pb_manager *provider)
+{
+ struct pb_ondemand_manager *mgr;
+
+ if(!provider)
+ return NULL;
+
+ mgr = CALLOC_STRUCT(pb_ondemand_manager);
+ if(!mgr)
+ return NULL;
+
+ mgr->base.destroy = pb_ondemand_manager_destroy;
+ mgr->base.create_buffer = pb_ondemand_manager_create_buffer;
+ mgr->base.flush = pb_ondemand_manager_flush;
+
+ mgr->provider = provider;
+
+ return &mgr->base;
+}
projects / mesa.git / commitdiff