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/************************************************************************** |
* |
* 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 ((int) 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); |
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->transfer = 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; |
} |