src/gallium/auxiliary/util/u_upload_mgr.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Helper utility for uploading user buffers & other data, and
  29  * coalescing small buffers into larger ones.
  30  */
  31
  32 #include "pipe/p_defines.h"
  33 #include "util/u_inlines.h"
  34 #include "pipe/p_context.h"
  35 #include "util/u_memory.h"
  36 #include "util/u_math.h"
  37
  38 #include "u_upload_mgr.h"
  39
  40
  41 struct u_upload_mgr {
  42    struct pipe_context *pipe;
  43
  44    unsigned default_size;  /* Minimum size of the upload buffer, in bytes. */
  45    unsigned bind;          /* Bitmask of PIPE_BIND_* flags. */
  46    enum pipe_resource_usage usage;
  47    unsigned map_flags;     /* Bitmask of PIPE_TRANSFER_* flags. */
  48    boolean map_persistent; /* If persistent mappings are supported. */
  49
  50    struct pipe_resource *buffer;   /* Upload buffer. */
  51    struct pipe_transfer *transfer; /* Transfer object for the upload buffer. */
  52    uint8_t *map;    /* Pointer to the mapped upload buffer. */
  53    unsigned offset; /* Aligned offset to the upload buffer, pointing
  54                      * at the first unused byte. */
  55 };
  56
  57
  58 struct u_upload_mgr *
  59 u_upload_create(struct pipe_context *pipe, unsigned default_size,
  60                 unsigned bind, enum pipe_resource_usage usage)
  61 {
  62    struct u_upload_mgr *upload = CALLOC_STRUCT( u_upload_mgr );
  63    if (!upload)
  64       return NULL;
  65
  66    upload->pipe = pipe;
  67    upload->default_size = default_size;
  68    upload->bind = bind;
  69    upload->usage = usage;
  70
  71    upload->map_persistent =
  72       pipe->screen->get_param(pipe->screen,
  73                               PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT);
  74
  75    if (upload->map_persistent) {
  76       upload->map_flags = PIPE_TRANSFER_WRITE |
  77                           PIPE_TRANSFER_PERSISTENT |
  78                           PIPE_TRANSFER_COHERENT;
  79    }
  80    else {
  81       upload->map_flags = PIPE_TRANSFER_WRITE |
  82                           PIPE_TRANSFER_UNSYNCHRONIZED |
  83                           PIPE_TRANSFER_FLUSH_EXPLICIT;
  84    }
  85
  86    return upload;
  87 }
  88
  89 struct u_upload_mgr *
  90 u_upload_create_default(struct pipe_context *pipe)
  91 {
  92    return u_upload_create(pipe, 1024 * 1024,
  93                           PIPE_BIND_VERTEX_BUFFER |
  94                           PIPE_BIND_INDEX_BUFFER |
  95                           PIPE_BIND_CONSTANT_BUFFER,
  96                           PIPE_USAGE_STREAM);
  97 }
  98
  99 static void upload_unmap_internal(struct u_upload_mgr *upload, boolean destroying)
 100 {
 101    if (!destroying && upload->map_persistent)
 102       return;
 103
 104    if (upload->transfer) {
 105       struct pipe_box *box = &upload->transfer->box;
 106
 107       if (!upload->map_persistent && (int) upload->offset > box->x) {
 108          pipe_buffer_flush_mapped_range(upload->pipe, upload->transfer,
 109                                         box->x, upload->offset - box->x);
 110       }
 111
 112       pipe_transfer_unmap(upload->pipe, upload->transfer);
 113       upload->transfer = NULL;
 114       upload->map = NULL;
 115    }
 116 }
 117
 118
 119 void u_upload_unmap( struct u_upload_mgr *upload )
 120 {
 121    upload_unmap_internal(upload, FALSE);
 122 }
 123
 124
 125 static void u_upload_release_buffer(struct u_upload_mgr *upload)
 126 {
 127    /* Unmap and unreference the upload buffer. */
 128    upload_unmap_internal(upload, TRUE);
 129    pipe_resource_reference( &upload->buffer, NULL );
 130 }
 131
 132
 133 void u_upload_destroy( struct u_upload_mgr *upload )
 134 {
 135    u_upload_release_buffer( upload );
 136    FREE( upload );
 137 }
 138
 139
 140 static void
 141 u_upload_alloc_buffer(struct u_upload_mgr *upload,
 142                       unsigned min_size)
 143 {
 144    struct pipe_screen *screen = upload->pipe->screen;
 145    struct pipe_resource buffer;
 146    unsigned size;
 147
 148    /* Release the old buffer, if present:
 149     */
 150    u_upload_release_buffer( upload );
 151
 152    /* Allocate a new one:
 153     */
 154    size = align(MAX2(upload->default_size, min_size), 4096);
 155
 156    memset(&buffer, 0, sizeof buffer);
 157    buffer.target = PIPE_BUFFER;
 158    buffer.format = PIPE_FORMAT_R8_UNORM; /* want TYPELESS or similar */
 159    buffer.bind = upload->bind;
 160    buffer.usage = upload->usage;
 161    buffer.width0 = size;
 162    buffer.height0 = 1;
 163    buffer.depth0 = 1;
 164    buffer.array_size = 1;
 165
 166    if (upload->map_persistent) {
 167       buffer.flags = PIPE_RESOURCE_FLAG_MAP_PERSISTENT |
 168                      PIPE_RESOURCE_FLAG_MAP_COHERENT;
 169    }
 170
 171    upload->buffer = screen->resource_create(screen, &buffer);
 172    if (upload->buffer == NULL)
 173       return;
 174
 175    /* Map the new buffer. */
 176    upload->map = pipe_buffer_map_range(upload->pipe, upload->buffer,
 177                                        0, size, upload->map_flags,
 178                                        &upload->transfer);
 179    if (upload->map == NULL) {
 180       upload->transfer = NULL;
 181       pipe_resource_reference(&upload->buffer, NULL);
 182       return;
 183    }
 184
 185    upload->offset = 0;
 186 }
 187
 188 void
 189 u_upload_alloc(struct u_upload_mgr *upload,
 190                unsigned min_out_offset,
 191                unsigned size,
 192                unsigned alignment,
 193                unsigned *out_offset,
 194                struct pipe_resource **outbuf,
 195                void **ptr)
 196 {
 197    unsigned buffer_size = upload->buffer ? upload->buffer->width0 : 0;
 198    unsigned offset;
 199
 200    min_out_offset = align(min_out_offset, alignment);
 201
 202    offset = align(upload->offset, alignment);
 203    offset = MAX2(offset, min_out_offset);
 204
 205    /* Make sure we have enough space in the upload buffer
 206     * for the sub-allocation.
 207     */
 208    if (unlikely(!upload->buffer || offset + size > buffer_size)) {
 209       u_upload_alloc_buffer(upload, min_out_offset + size);
 210
 211       if (unlikely(!upload->buffer)) {
 212          *out_offset = ~0;
 213          pipe_resource_reference(outbuf, NULL);
 214          *ptr = NULL;
 215          return;
 216       }
 217
 218       offset = min_out_offset;
 219       buffer_size = upload->buffer->width0;
 220    }
 221
 222    if (unlikely(!upload->map)) {
 223       upload->map = pipe_buffer_map_range(upload->pipe, upload->buffer,
 224                                           offset,
 225                                           buffer_size - offset,
 226                                           upload->map_flags,
 227                                           &upload->transfer);
 228       if (unlikely(!upload->map)) {
 229          upload->transfer = NULL;
 230          *out_offset = ~0;
 231          pipe_resource_reference(outbuf, NULL);
 232          *ptr = NULL;
 233          return;
 234       }
 235
 236       upload->map -= offset;
 237    }
 238
 239    assert(offset < buffer_size);
 240    assert(offset + size <= buffer_size);
 241    assert(size);
 242
 243    /* Emit the return values: */
 244    *ptr = upload->map + offset;
 245    pipe_resource_reference(outbuf, upload->buffer);
 246    *out_offset = offset;
 247
 248    upload->offset = offset + size;
 249 }
 250
 251 void u_upload_data(struct u_upload_mgr *upload,
 252                    unsigned min_out_offset,
 253                    unsigned size,
 254                    unsigned alignment,
 255                    const void *data,
 256                    unsigned *out_offset,
 257                    struct pipe_resource **outbuf)
 258 {
 259    uint8_t *ptr;
 260
 261    u_upload_alloc(upload, min_out_offset, size, alignment,
 262                   out_offset, outbuf,
 263                   (void**)&ptr);
 264    if (ptr)
 265       memcpy(ptr, data, size);
 266 }