| /************************************************************************** |
| * |
| * 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; |
| } |
| |
| void u_upload_unmap( struct u_upload_mgr *upload ) |
| { |
| if (upload->transfer) { |
| struct pipe_box *box = &upload->transfer->box; |
| if (upload->offset > box->x) { |
| |
| pipe_buffer_flush_mapped_range(upload->pipe, upload->transfer, |
| box->x, upload->offset - box->x); |
| } |
| pipe_transfer_unmap(upload->pipe, upload->transfer); |
| pipe_transfer_destroy(upload->pipe, upload->transfer); |
| upload->transfer = NULL; |
| upload->map = NULL; |
| } |
| } |
| |
| /* 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. */ |
| u_upload_unmap(upload); |
| 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) { |
| return PIPE_ERROR_OUT_OF_MEMORY; |
| } |
| |
| /* 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); |
| if (upload->map == NULL) { |
| upload->size = 0; |
| pipe_resource_reference(&upload->buffer, NULL); |
| return PIPE_ERROR_OUT_OF_MEMORY; |
| } |
| |
| upload->size = size; |
| |
| upload->offset = 0; |
| return PIPE_OK; |
| } |
| |
| enum pipe_error u_upload_alloc( struct u_upload_mgr *upload, |
| unsigned min_out_offset, |
| unsigned size, |
| unsigned *out_offset, |
| struct pipe_resource **outbuf, |
| void **ptr ) |
| { |
| unsigned alloc_size = align( size, upload->alignment ); |
| unsigned alloc_offset = align(min_out_offset, upload->alignment); |
| unsigned offset; |
| |
| /* Init these return values here in case we fail below to make |
| * sure the caller doesn't get garbage values. |
| */ |
| *out_offset = ~0; |
| pipe_resource_reference(outbuf, NULL); |
| *ptr = NULL; |
| |
| /* 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 != PIPE_OK) |
| return ret; |
| } |
| |
| offset = MAX2(upload->offset, alloc_offset); |
| |
| if (!upload->map) { |
| upload->map = pipe_buffer_map_range(upload->pipe, upload->buffer, |
| offset, upload->size - offset, |
| PIPE_TRANSFER_WRITE | |
| PIPE_TRANSFER_FLUSH_EXPLICIT | |
| PIPE_TRANSFER_UNSYNCHRONIZED, |
| &upload->transfer); |
| if (!upload->map) { |
| upload->transfer = NULL; |
| return PIPE_ERROR_OUT_OF_MEMORY; |
| } |
| |
| upload->map -= 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) |
| { |
| uint8_t *ptr; |
| enum pipe_error ret = u_upload_alloc(upload, min_out_offset, size, |
| out_offset, outbuf, |
| (void**)&ptr); |
| if (ret != PIPE_OK) |
| 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) |
| { |
| enum pipe_error ret = PIPE_OK; |
| struct pipe_transfer *transfer = NULL; |
| const char *map = NULL; |
| |
| map = (const char *)pipe_buffer_map_range(upload->pipe, |
| inbuf, |
| offset, size, |
| PIPE_TRANSFER_READ, |
| &transfer); |
| |
| if (map == NULL) { |
| return PIPE_ERROR_OUT_OF_MEMORY; |
| } |
| |
| 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, |
| out_offset, |
| outbuf); |
| |
| pipe_buffer_unmap( upload->pipe, transfer ); |
| |
| return ret; |
| } |
