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
  26 #include <stdio.h>
  27
  28 #include "util/u_inlines.h"
  29 #include "util/u_format.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_upload_mgr.h"
  32 #include "util/u_math.h"
  33
  34 #include "r300_screen_buffer.h"
  35 #include "r300_winsys.h"
  36
  37 unsigned r300_buffer_is_referenced(struct pipe_context *context,
  38                                    struct pipe_resource *buf,
  39                                    enum r300_reference_domain domain)
  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, domain))
  48         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
  49
  50     return PIPE_UNREFERENCED;
  51 }
  52
  53 static unsigned r300_buffer_is_referenced_by_cs(struct pipe_context *context,
  54                                                 struct pipe_resource *buf,
  55                                                 unsigned face, unsigned level)
  56 {
  57     return r300_buffer_is_referenced(context, buf, R300_REF_CS);
  58 }
  59
  60 /* External helper, not required to implent u_resource_vtbl:
  61  */
  62 int r300_upload_index_buffer(struct r300_context *r300,
  63                              struct pipe_resource **index_buffer,
  64                              unsigned index_size,
  65                              unsigned start,
  66                              unsigned count)
  67 {
  68    struct pipe_resource *upload_buffer = NULL;
  69    unsigned index_offset = start * index_size;
  70    int ret = 0;
  71
  72     if (r300_buffer_is_user_buffer(*index_buffer)) {
  73         ret = u_upload_buffer(r300->upload_ib,
  74                               index_offset,
  75                               count * index_size,
  76                               *index_buffer,
  77                               &index_offset,
  78                               &upload_buffer);
  79         if (ret) {
  80             goto done;
  81         }
  82         *index_buffer = upload_buffer;
  83     }
  84  done:
  85     //    if (upload_buffer)
  86     //  pipe_resource_reference(&upload_buffer, NULL);
  87     return ret;
  88 }
  89
  90 /* External helper, not required to implement u_resource_vtbl:
  91  */
  92 int r300_upload_user_buffers(struct r300_context *r300)
  93 {
  94     enum pipe_error ret = PIPE_OK;
  95     int i, nr;
  96
  97     nr = r300->vertex_buffer_count;
  98
  99     for (i = 0; i < nr; i++) {
 100         if (r300_buffer_is_user_buffer(r300->vertex_buffer[i].buffer)) {
 101             struct pipe_resource *upload_buffer = NULL;
 102             unsigned offset = 0; /*r300->vertex_buffer[i].buffer_offset * 4;*/
 103             unsigned size = r300->vertex_buffer[i].buffer->width0;
 104             unsigned upload_offset;
 105             ret = u_upload_buffer(r300->upload_vb,
 106                                   offset, size,
 107                                   r300->vertex_buffer[i].buffer,
 108                                   &upload_offset, &upload_buffer);
 109             if (ret)
 110                 return ret;
 111
 112             pipe_resource_reference(&r300->vertex_buffer[i].buffer, NULL);
 113             r300->vertex_buffer[i].buffer = upload_buffer;
 114             r300->vertex_buffer[i].buffer_offset = upload_offset;
 115         }
 116     }
 117     return ret;
 118 }
 119
 120 static struct r300_winsys_buffer *
 121 r300_winsys_buffer_create(struct r300_screen *r300screen,
 122                           unsigned alignment,
 123                           unsigned usage,
 124                           unsigned size)
 125 {
 126     struct r300_winsys_screen *rws = r300screen->rws;
 127     struct r300_winsys_buffer *buf;
 128
 129     buf = rws->buffer_create(rws, alignment, usage, size);
 130     return buf;
 131 }
 132
 133 static void r300_winsys_buffer_destroy(struct r300_screen *r300screen,
 134                                        struct r300_buffer *rbuf)
 135 {
 136     struct r300_winsys_screen *rws = r300screen->rws;
 137
 138     if (rbuf->buf) {
 139         rws->buffer_reference(rws, &rbuf->buf, NULL);
 140         rbuf->buf = NULL;
 141     }
 142 }
 143
 144 static void r300_buffer_destroy(struct pipe_screen *screen,
 145                                 struct pipe_resource *buf)
 146 {
 147     struct r300_screen *r300screen = r300_screen(screen);
 148     struct r300_buffer *rbuf = r300_buffer(buf);
 149
 150     r300_winsys_buffer_destroy(r300screen, rbuf);
 151     FREE(rbuf);
 152 }
 153
 154 static void *
 155 r300_buffer_transfer_map( struct pipe_context *pipe,
 156                           struct pipe_transfer *transfer )
 157 {
 158     struct r300_screen *r300screen = r300_screen(pipe->screen);
 159     struct r300_winsys_screen *rws = r300screen->rws;
 160     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 161     uint8_t *map;
 162     boolean flush = FALSE;
 163     unsigned i;
 164
 165     if (rbuf->user_buffer)
 166         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 167
 168     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER) {
 169         goto just_map;
 170     }
 171
 172     /* check if the mapping is to a range we already flushed */
 173     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 174         for (i = 0; i < rbuf->num_ranges; i++) {
 175             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 176                 (transfer->box.x < rbuf->ranges[i].end))
 177                 flush = TRUE;
 178
 179             if (flush) {
 180                 /* unreference this hw buffer and allocate a new one */
 181                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 182
 183                 rbuf->num_ranges = 0;
 184                 rbuf->buf = r300_winsys_buffer_create(r300screen,
 185                                                       16,
 186                                                       rbuf->b.b.bind, /* XXX */
 187                                                       rbuf->b.b.width0);
 188                 break;
 189             }
 190         }
 191     }
 192 just_map:
 193     map = rws->buffer_map(rws, rbuf->buf, transfer->usage);
 194
 195     if (map == NULL)
 196         return NULL;
 197
 198     /* map_buffer() returned a pointer to the beginning of the buffer,
 199      * but transfers are expected to return a pointer to just the
 200      * region specified in the box.
 201      */
 202     return map + transfer->box.x;
 203 }
 204
 205 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 206                                                struct pipe_transfer *transfer,
 207                                                const struct pipe_box *box)
 208 {
 209     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 210     unsigned i;
 211     unsigned offset = transfer->box.x + box->x;
 212     unsigned length = box->width;
 213
 214     assert(box->x + box->width <= transfer->box.width);
 215
 216     if (rbuf->user_buffer)
 217         return;
 218
 219     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER)
 220         return;
 221
 222     /* mark the range as used */
 223     for(i = 0; i < rbuf->num_ranges; ++i) {
 224         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 225             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 226             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 227             return;
 228         }
 229     }
 230
 231     rbuf->ranges[rbuf->num_ranges].start = offset;
 232     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 233     rbuf->num_ranges++;
 234 }
 235
 236 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 237                             struct pipe_transfer *transfer )
 238 {
 239     struct r300_screen *r300screen = r300_screen(pipe->screen);
 240     struct r300_winsys_screen *rws = r300screen->rws;
 241     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 242
 243     if (rbuf->buf) {
 244         rws->buffer_unmap(rws, rbuf->buf);
 245     }
 246 }
 247
 248 struct u_resource_vtbl r300_buffer_vtbl =
 249 {
 250    u_default_resource_get_handle,      /* get_handle */
 251    r300_buffer_destroy,              /* resource_destroy */
 252    r300_buffer_is_referenced_by_cs,  /* is_buffer_referenced */
 253    u_default_get_transfer,           /* get_transfer */
 254    u_default_transfer_destroy,       /* transfer_destroy */
 255    r300_buffer_transfer_map,         /* transfer_map */
 256    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 257    r300_buffer_transfer_unmap,       /* transfer_unmap */
 258    u_default_transfer_inline_write   /* transfer_inline_write */
 259 };
 260
 261 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 262                                          const struct pipe_resource *templ)
 263 {
 264     struct r300_screen *r300screen = r300_screen(screen);
 265     struct r300_buffer *rbuf;
 266     unsigned alignment = 16;
 267
 268     rbuf = CALLOC_STRUCT(r300_buffer);
 269     if (!rbuf)
 270         goto error1;
 271
 272     rbuf->magic = R300_BUFFER_MAGIC;
 273
 274     rbuf->b.b = *templ;
 275     rbuf->b.vtbl = &r300_buffer_vtbl;
 276     pipe_reference_init(&rbuf->b.b.reference, 1);
 277     rbuf->b.b.screen = screen;
 278
 279     if (rbuf->b.b.bind & R300_BIND_OQBO)
 280         alignment = 4096;
 281
 282     rbuf->buf = r300_winsys_buffer_create(r300screen,
 283                                           alignment,
 284                                           rbuf->b.b.bind,
 285                                           rbuf->b.b.width0);
 286
 287     if (!rbuf->buf)
 288         goto error2;
 289
 290     return &rbuf->b.b;
 291 error2:
 292     FREE(rbuf);
 293 error1:
 294     return NULL;
 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 }