src/gallium/drivers/r300/r300_screen_buffer.c

   1 /*
   2  * Copyright 2010 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors: Dave Airlie
  24  */
  25 #include <stdio.h>
  26
  27 #include "util/u_inlines.h"
  28 #include "util/u_format.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_upload_mgr.h"
  31 #include "util/u_math.h"
  32
  33 #include "r300_screen_buffer.h"
  34
  35 #include "r300_winsys.h"
  36
  37 static unsigned r300_buffer_is_referenced(struct pipe_context *context,
  38                                          struct pipe_resource *buf,
  39                                          unsigned face, unsigned level)
  40 {
  41     struct r300_context *r300 = r300_context(context);
  42     struct r300_buffer *rbuf = r300_buffer(buf);
  43
  44     if (r300_buffer_is_user_buffer(buf))
  45         return PIPE_UNREFERENCED;
  46
  47     if (r300->rws->is_buffer_referenced(r300->rws, rbuf->buf))
  48         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
  49
  50     return PIPE_UNREFERENCED;
  51 }
  52
  53 /* External helper, not required to implent u_resource_vtbl:
  54  */
  55 int r300_upload_index_buffer(struct r300_context *r300,
  56                              struct pipe_resource **index_buffer,
  57                              unsigned index_size,
  58                              unsigned start,
  59                              unsigned count)
  60 {
  61    struct pipe_resource *upload_buffer = NULL;
  62    unsigned index_offset = start * index_size;
  63    int ret = 0;
  64
  65     if (r300_buffer_is_user_buffer(*index_buffer)) {
  66         ret = u_upload_buffer(r300->upload_ib,
  67                               index_offset,
  68                               count * index_size,
  69                               *index_buffer,
  70                               &index_offset,
  71                               &upload_buffer);
  72         if (ret) {
  73             goto done;
  74         }
  75         *index_buffer = upload_buffer;
  76     }
  77  done:
  78     //    if (upload_buffer)
  79     //  pipe_resource_reference(&upload_buffer, NULL);
  80     return ret;
  81 }
  82
  83 /* External helper, not required to implent u_resource_vtbl:
  84  */
  85 int r300_upload_user_buffers(struct r300_context *r300)
  86 {
  87     enum pipe_error ret = PIPE_OK;
  88     int i, nr;
  89
  90     nr = r300->vertex_buffer_count;
  91
  92     for (i = 0; i < nr; i++) {
  93
  94         if (r300_buffer_is_user_buffer(r300->vertex_buffer[i].buffer)) {
  95             struct pipe_resource *upload_buffer = NULL;
  96             unsigned offset = 0; /*r300->vertex_buffer[i].buffer_offset * 4;*/
  97             unsigned size = r300->vertex_buffer[i].buffer->width0;
  98             unsigned upload_offset;
  99             ret = u_upload_buffer(r300->upload_vb,
 100                                   offset, size,
 101                                   r300->vertex_buffer[i].buffer,
 102                                   &upload_offset, &upload_buffer);
 103             if (ret)
 104                 return ret;
 105
 106             pipe_resource_reference(&r300->vertex_buffer[i].buffer, NULL);
 107             r300->vertex_buffer[i].buffer = upload_buffer;
 108             r300->vertex_buffer[i].buffer_offset = upload_offset;
 109         }
 110     }
 111     return ret;
 112 }
 113
 114 static struct r300_winsys_buffer *
 115 r300_winsys_buffer_create(struct r300_screen *r300screen,
 116                           unsigned alignment,
 117                           unsigned usage,
 118                           unsigned size)
 119 {
 120     struct r300_winsys_screen *rws = r300screen->rws;
 121     struct r300_winsys_buffer *buf;
 122
 123     buf = rws->buffer_create(rws, alignment, usage, size);
 124     return buf;
 125 }
 126
 127 static void r300_winsys_buffer_destroy(struct r300_screen *r300screen,
 128                                        struct r300_buffer *rbuf)
 129 {
 130     struct r300_winsys_screen *rws = r300screen->rws;
 131
 132     if (rbuf->buf) {
 133         rws->buffer_reference(rws, &rbuf->buf, NULL);
 134         rbuf->buf = NULL;
 135     }
 136 }
 137
 138
 139 static void r300_buffer_destroy(struct pipe_screen *screen,
 140                                 struct pipe_resource *buf)
 141 {
 142     struct r300_screen *r300screen = r300_screen(screen);
 143     struct r300_buffer *rbuf = r300_buffer(buf);
 144
 145     r300_winsys_buffer_destroy(r300screen, rbuf);
 146     FREE(rbuf);
 147 }
 148
 149 static void *
 150 r300_buffer_map_range(struct pipe_screen *screen,
 151                       struct pipe_resource *buf,
 152                       unsigned offset, unsigned length,
 153                       unsigned usage )
 154 {
 155     struct r300_screen *r300screen = r300_screen(screen);
 156     struct r300_winsys_screen *rws = r300screen->rws;
 157     struct r300_buffer *rbuf = r300_buffer(buf);
 158     void *map;
 159     int flush = 0;
 160     int i;
 161
 162     if (rbuf->user_buffer)
 163         return rbuf->user_buffer;
 164
 165     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER) {
 166         goto just_map;
 167     }
 168
 169     /* check if the mapping is to a range we already flushed */
 170     if (usage & PIPE_TRANSFER_DISCARD) {
 171         for (i = 0; i < rbuf->num_ranges; i++) {
 172
 173             if ((offset >= rbuf->ranges[i].start) &&
 174                 (offset < rbuf->ranges[i].end))
 175                 flush = 1;
 176
 177             if (flush) {
 178                 /* unreference this hw buffer and allocate a new one */
 179                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 180
 181                 rbuf->num_ranges = 0;
 182                 rbuf->map = NULL;
 183                 rbuf->buf = r300_winsys_buffer_create(r300screen,
 184                                                       16,
 185                                                       rbuf->b.b.bind, /* XXX */
 186                                                       rbuf->b.b.width0);
 187                 break;
 188             }
 189         }
 190     }
 191 just_map:
 192     map = rws->buffer_map(rws, rbuf->buf, usage);
 193
 194     return map;
 195 }
 196
 197 static void
 198 r300_buffer_flush_mapped_range( struct pipe_screen *screen,
 199                                 struct pipe_resource *buf,
 200                                 unsigned offset,
 201                                 unsigned length )
 202 {
 203     struct r300_buffer *rbuf = r300_buffer(buf);
 204     int i;
 205
 206     if (rbuf->user_buffer)
 207         return;
 208
 209     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER)
 210         return;
 211
 212     /* mark the range as used */
 213     for(i = 0; i < rbuf->num_ranges; ++i) {
 214         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+length)) {
 215             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 216             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 217             return;
 218         }
 219     }
 220
 221     rbuf->ranges[rbuf->num_ranges].start = offset;
 222     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 223     rbuf->num_ranges++;
 224 }
 225
 226
 227 static void
 228 r300_buffer_unmap(struct pipe_screen *screen,
 229                   struct pipe_resource *buf)
 230 {
 231     struct r300_screen *r300screen = r300_screen(screen);
 232     struct r300_winsys_screen *rws = r300screen->rws;
 233     struct r300_buffer *rbuf = r300_buffer(buf);
 234
 235     if (rbuf->buf) {
 236         rws->buffer_unmap(rws, rbuf->buf);
 237     }
 238 }
 239
 240
 241
 242
 243 /* As a first step, keep the original code intact, implement buffer
 244  * transfers in terms of the old map/unmap functions.
 245  *
 246  * Utility functions for transfer create/destroy are hooked in and
 247  * just record the arguments to those functions.
 248  */
 249 static void *
 250 r300_buffer_transfer_map( struct pipe_context *pipe,
 251                           struct pipe_transfer *transfer )
 252 {
 253    uint8_t *map = r300_buffer_map_range( pipe->screen,
 254                                          transfer->resource,
 255                                          transfer->box.x,
 256                                          transfer->box.width,
 257                                          transfer->usage );
 258    if (map == NULL)
 259       return NULL;
 260
 261    /* map_buffer() returned a pointer to the beginning of the buffer,
 262     * but transfers are expected to return a pointer to just the
 263     * region specified in the box.
 264     */
 265    return map + transfer->box.x;
 266 }
 267
 268
 269
 270 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 271                                                struct pipe_transfer *transfer,
 272                                                const struct pipe_box *box)
 273 {
 274    assert(box->x + box->width <= transfer->box.width);
 275
 276    r300_buffer_flush_mapped_range(pipe->screen,
 277                                   transfer->resource,
 278                                   transfer->box.x + box->x,
 279                                   box->width);
 280 }
 281
 282 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 283                             struct pipe_transfer *transfer )
 284 {
 285    r300_buffer_unmap(pipe->screen,
 286                      transfer->resource);
 287 }
 288
 289
 290
 291
 292 struct u_resource_vtbl r300_buffer_vtbl =
 293 {
 294    u_default_resource_get_handle,      /* get_handle */
 295    r300_buffer_destroy,              /* resource_destroy */
 296    r300_buffer_is_referenced,        /* is_buffer_referenced */
 297    u_default_get_transfer,           /* get_transfer */
 298    u_default_transfer_destroy,       /* transfer_destroy */
 299    r300_buffer_transfer_map,         /* transfer_map */
 300    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 301    r300_buffer_transfer_unmap,       /* transfer_unmap */
 302    u_default_transfer_inline_write   /* transfer_inline_write */
 303 };
 304
 305
 306
 307
 308 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 309                                          const struct pipe_resource *template)
 310 {
 311     struct r300_screen *r300screen = r300_screen(screen);
 312     struct r300_buffer *rbuf;
 313     unsigned alignment = 16;
 314
 315     rbuf = CALLOC_STRUCT(r300_buffer);
 316     if (!rbuf)
 317         goto error1;
 318
 319     rbuf->magic = R300_BUFFER_MAGIC;
 320
 321     rbuf->b.b = *template;
 322     rbuf->b.vtbl = &r300_buffer_vtbl;
 323     pipe_reference_init(&rbuf->b.b.reference, 1);
 324     rbuf->b.b.screen = screen;
 325
 326     if (rbuf->b.b.bind & R300_BIND_OQBO)
 327        alignment = 4096;
 328
 329     rbuf->buf = r300_winsys_buffer_create(r300screen,
 330                                           alignment,
 331                                           rbuf->b.b.bind,
 332                                           rbuf->b.b.width0);
 333
 334     if (!rbuf->buf)
 335         goto error2;
 336
 337     return &rbuf->b.b;
 338 error2:
 339     FREE(rbuf);
 340 error1:
 341     return NULL;
 342 }
 343
 344
 345 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 346                                               void *ptr,
 347                                               unsigned bytes,
 348                                               unsigned bind)
 349 {
 350     struct r300_buffer *rbuf;
 351
 352     rbuf = CALLOC_STRUCT(r300_buffer);
 353     if (!rbuf)
 354         goto no_rbuf;
 355
 356     rbuf->magic = R300_BUFFER_MAGIC;
 357
 358     pipe_reference_init(&rbuf->b.b.reference, 1);
 359     rbuf->b.vtbl = &r300_buffer_vtbl;
 360     rbuf->b.b.screen = screen;
 361     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 362     rbuf->b.b._usage = PIPE_USAGE_IMMUTABLE;
 363     rbuf->b.b.bind = bind;
 364     rbuf->b.b.width0 = bytes;
 365     rbuf->b.b.height0 = 1;
 366     rbuf->b.b.depth0 = 1;
 367
 368     rbuf->user_buffer = ptr;
 369     return &rbuf->b.b;
 370
 371 no_rbuf:
 372     return NULL;
 373 }
 374