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_transfer_map( struct pipe_context *pipe,
 151                           struct pipe_transfer *transfer )
 152 {
 153     struct r300_screen *r300screen = r300_screen(pipe->screen);
 154     struct r300_winsys_screen *rws = r300screen->rws;
 155     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 156     uint8_t *map;
 157     boolean flush = FALSE;
 158     unsigned i;
 159
 160     if (rbuf->user_buffer)
 161         return rbuf->user_buffer + transfer->box.x;
 162
 163     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER) {
 164         goto just_map;
 165     }
 166
 167     /* check if the mapping is to a range we already flushed */
 168     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 169         for (i = 0; i < rbuf->num_ranges; i++) {
 170             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 171                 (transfer->box.x < rbuf->ranges[i].end))
 172                 flush = TRUE;
 173
 174             if (flush) {
 175                 /* unreference this hw buffer and allocate a new one */
 176                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 177
 178                 rbuf->num_ranges = 0;
 179                 rbuf->map = NULL;
 180                 rbuf->buf = r300_winsys_buffer_create(r300screen,
 181                                                       16,
 182                                                       rbuf->b.b.bind, /* XXX */
 183                                                       rbuf->b.b.width0);
 184                 break;
 185             }
 186         }
 187     }
 188 just_map:
 189     map = rws->buffer_map(rws, rbuf->buf, transfer->usage);
 190
 191     if (map == NULL)
 192         return NULL;
 193
 194     /* map_buffer() returned a pointer to the beginning of the buffer,
 195      * but transfers are expected to return a pointer to just the
 196      * region specified in the box.
 197      */
 198     return map + transfer->box.x;
 199 }
 200
 201 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 202                                                struct pipe_transfer *transfer,
 203                                                const struct pipe_box *box)
 204 {
 205     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 206     unsigned i;
 207     unsigned offset = transfer->box.x + box->x;
 208     unsigned length = box->width;
 209
 210     assert(box->x + box->width <= transfer->box.width);
 211
 212     if (rbuf->user_buffer)
 213         return;
 214
 215     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER)
 216         return;
 217
 218     /* mark the range as used */
 219     for(i = 0; i < rbuf->num_ranges; ++i) {
 220         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 221             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 222             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 223             return;
 224         }
 225     }
 226
 227     rbuf->ranges[rbuf->num_ranges].start = offset;
 228     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 229     rbuf->num_ranges++;
 230 }
 231
 232 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 233                             struct pipe_transfer *transfer )
 234 {
 235     struct r300_screen *r300screen = r300_screen(pipe->screen);
 236     struct r300_winsys_screen *rws = r300screen->rws;
 237     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 238
 239     if (rbuf->buf) {
 240         rws->buffer_unmap(rws, rbuf->buf);
 241     }
 242 }
 243
 244 struct u_resource_vtbl r300_buffer_vtbl =
 245 {
 246    u_default_resource_get_handle,      /* get_handle */
 247    r300_buffer_destroy,              /* resource_destroy */
 248    r300_buffer_is_referenced,        /* is_buffer_referenced */
 249    u_default_get_transfer,           /* get_transfer */
 250    u_default_transfer_destroy,       /* transfer_destroy */
 251    r300_buffer_transfer_map,         /* transfer_map */
 252    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 253    r300_buffer_transfer_unmap,       /* transfer_unmap */
 254    u_default_transfer_inline_write   /* transfer_inline_write */
 255 };
 256
 257
 258
 259
 260 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 261                                          const struct pipe_resource *templ)
 262 {
 263     struct r300_screen *r300screen = r300_screen(screen);
 264     struct r300_buffer *rbuf;
 265     unsigned alignment = 16;
 266
 267     rbuf = CALLOC_STRUCT(r300_buffer);
 268     if (!rbuf)
 269         goto error1;
 270
 271     rbuf->magic = R300_BUFFER_MAGIC;
 272
 273     rbuf->b.b = *templ;
 274     rbuf->b.vtbl = &r300_buffer_vtbl;
 275     pipe_reference_init(&rbuf->b.b.reference, 1);
 276     rbuf->b.b.screen = screen;
 277
 278     if (rbuf->b.b.bind & R300_BIND_OQBO)
 279        alignment = 4096;
 280
 281     rbuf->buf = r300_winsys_buffer_create(r300screen,
 282                                           alignment,
 283                                           rbuf->b.b.bind,
 284                                           rbuf->b.b.width0);
 285
 286     if (!rbuf->buf)
 287         goto error2;
 288
 289     return &rbuf->b.b;
 290 error2:
 291     FREE(rbuf);
 292 error1:
 293     return NULL;
 294 }
 295
 296
 297 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 298                                               void *ptr,
 299                                               unsigned bytes,
 300                                               unsigned bind)
 301 {
 302     struct r300_buffer *rbuf;
 303
 304     rbuf = CALLOC_STRUCT(r300_buffer);
 305     if (!rbuf)
 306         goto no_rbuf;
 307
 308     rbuf->magic = R300_BUFFER_MAGIC;
 309
 310     pipe_reference_init(&rbuf->b.b.reference, 1);
 311     rbuf->b.vtbl = &r300_buffer_vtbl;
 312     rbuf->b.b.screen = screen;
 313     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 314     rbuf->b.b._usage = PIPE_USAGE_IMMUTABLE;
 315     rbuf->b.b.bind = bind;
 316     rbuf->b.b.width0 = bytes;
 317     rbuf->b.b.height0 = 1;
 318     rbuf->b.b.depth0 = 1;
 319
 320     rbuf->user_buffer = ptr;
 321     return &rbuf->b.b;
 322
 323 no_rbuf:
 324     return NULL;
 325 }
 326