From: José Fonseca Date: Mon, 24 Nov 2008 14:17:49 +0000 (+0900) Subject: pipebuffer: Ondemand buffer manager. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=444e98de31c5456008a4b3568373db02ddc5385f;p=mesa.git pipebuffer: Ondemand buffer manager. A variation of malloc buffers which get transferred to real graphics memory when there is an attempt to validate them. --- diff --git a/src/gallium/auxiliary/pipebuffer/Makefile b/src/gallium/auxiliary/pipebuffer/Makefile index f9b39d9ce0a..4bcf08f8a53 100644 --- a/src/gallium/auxiliary/pipebuffer/Makefile +++ b/src/gallium/auxiliary/pipebuffer/Makefile @@ -11,6 +11,7 @@ C_SOURCES = \ pb_bufmgr_debug.c \ pb_bufmgr_fenced.c \ pb_bufmgr_mm.c \ + pb_bufmgr_ondemand.c \ pb_bufmgr_pool.c \ pb_bufmgr_slab.c \ pb_validate.c \ diff --git a/src/gallium/auxiliary/pipebuffer/SConscript b/src/gallium/auxiliary/pipebuffer/SConscript index 56a40dda0d4..4acf7218083 100644 --- a/src/gallium/auxiliary/pipebuffer/SConscript +++ b/src/gallium/auxiliary/pipebuffer/SConscript @@ -10,6 +10,7 @@ pipebuffer = env.ConvenienceLibrary( 'pb_bufmgr_debug.c', 'pb_bufmgr_fenced.c', 'pb_bufmgr_mm.c', + 'pb_bufmgr_ondemand.c', 'pb_bufmgr_pool.c', 'pb_bufmgr_slab.c', 'pb_validate.c', diff --git a/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h b/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h index 8fe2704708f..0a8264a9243 100644 --- a/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h +++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h @@ -182,6 +182,20 @@ pb_alt_manager_create(struct pb_manager *provider1, struct pb_manager *provider2); +/** + * Ondemand buffer manager. + * + * Buffers are created in malloc'ed memory (fast and cached), and the constents + * is transfered to a buffer from the provider (typically in slow uncached + * memory) when there is an attempt to validate the buffer. + * + * Ideal for situations where one does not know before hand whether a given + * buffer will effectively be used by the hardware or not. + */ +struct pb_manager * +pb_ondemand_manager_create(struct pb_manager *provider); + + /** * Debug buffer manager to detect buffer under- and overflows. * diff --git a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_ondemand.c b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_ondemand.c new file mode 100644 index 00000000000..ba02a84e62d --- /dev/null +++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_ondemand.c @@ -0,0 +1,303 @@ +/************************************************************************** + * + * 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 + */ + + +#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; +}