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_memory.h"
  30 #include "util/u_upload_mgr.h"
  31 #include "util/u_math.h"
  32
  33 #include "r300_screen_buffer.h"
  34 #include "r300_winsys.h"
  35
  36 unsigned r300_buffer_is_referenced(struct pipe_context *context,
  37                                    struct pipe_resource *buf,
  38                                    enum r300_reference_domain domain)
  39 {
  40     struct r300_context *r300 = r300_context(context);
  41     struct r300_buffer *rbuf = r300_buffer(buf);
  42
  43     if (r300_buffer_is_user_buffer(buf))
  44         return PIPE_UNREFERENCED;
  45
  46     if (r300->rws->is_buffer_referenced(r300->rws, rbuf->buf, domain))
  47         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
  48
  49     return PIPE_UNREFERENCED;
  50 }
  51
  52 static unsigned r300_buffer_is_referenced_by_cs(struct pipe_context *context,
  53                                                 struct pipe_resource *buf,
  54                                                 unsigned face, unsigned level)
  55 {
  56     return r300_buffer_is_referenced(context, buf, R300_REF_CS);
  57 }
  58
  59 /* External helper, not required to implent u_resource_vtbl:
  60  */
  61 int r300_upload_index_buffer(struct r300_context *r300,
  62                              struct pipe_resource **index_buffer,
  63                              unsigned index_size,
  64                              unsigned start,
  65                              unsigned count)
  66 {
  67    struct pipe_resource *upload_buffer = NULL;
  68    unsigned index_offset = start * index_size;
  69    int ret = 0;
  70
  71     if (r300_buffer_is_user_buffer(*index_buffer)) {
  72         ret = u_upload_buffer(r300->upload_ib,
  73                               index_offset,
  74                               count * index_size,
  75                               *index_buffer,
  76                               &index_offset,
  77                               &upload_buffer);
  78         if (ret) {
  79             goto done;
  80         }
  81         *index_buffer = upload_buffer;
  82     }
  83  done:
  84     //    if (upload_buffer)
  85     //  pipe_resource_reference(&upload_buffer, NULL);
  86     return ret;
  87 }
  88
  89 /* External helper, not required to implement u_resource_vtbl:
  90  */
  91 int r300_upload_user_buffers(struct r300_context *r300)
  92 {
  93     enum pipe_error ret = PIPE_OK;
  94     int i, nr;
  95
  96     nr = r300->velems->count;
  97
  98     for (i = 0; i < nr; i++) {
  99         struct pipe_vertex_buffer *vb =
 100             &r300->vertex_buffer[r300->velems->velem[i].vertex_buffer_index];
 101
 102         if (r300_buffer_is_user_buffer(vb->buffer)) {
 103             struct pipe_resource *upload_buffer = NULL;
 104             unsigned offset = 0; /*vb->buffer_offset * 4;*/
 105             unsigned size = vb->buffer->width0;
 106             unsigned upload_offset;
 107             ret = u_upload_buffer(r300->upload_vb,
 108                                   offset, size,
 109                                   vb->buffer,
 110                                   &upload_offset, &upload_buffer);
 111             if (ret)
 112                 return ret;
 113
 114             pipe_resource_reference(&vb->buffer, NULL);
 115             vb->buffer = upload_buffer;
 116             vb->buffer_offset = upload_offset;
 117         }
 118     }
 119     return ret;
 120 }
 121
 122 static void r300_winsys_buffer_destroy(struct r300_screen *r300screen,
 123                                        struct r300_buffer *rbuf)
 124 {
 125     struct r300_winsys_screen *rws = r300screen->rws;
 126
 127     if (rbuf->buf) {
 128         rws->buffer_reference(rws, &rbuf->buf, NULL);
 129         rbuf->buf = NULL;
 130     }
 131 }
 132
 133 static void r300_buffer_destroy(struct pipe_screen *screen,
 134                                 struct pipe_resource *buf)
 135 {
 136     struct r300_screen *r300screen = r300_screen(screen);
 137     struct r300_buffer *rbuf = r300_buffer(buf);
 138
 139     r300_winsys_buffer_destroy(r300screen, rbuf);
 140     FREE(rbuf);
 141 }
 142
 143 static void *
 144 r300_buffer_transfer_map( struct pipe_context *pipe,
 145                           struct pipe_transfer *transfer )
 146 {
 147     struct r300_screen *r300screen = r300_screen(pipe->screen);
 148     struct r300_winsys_screen *rws = r300screen->rws;
 149     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 150     uint8_t *map;
 151     boolean flush = FALSE;
 152     unsigned i;
 153
 154     if (rbuf->user_buffer)
 155         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 156
 157     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER) {
 158         goto just_map;
 159     }
 160
 161     /* check if the mapping is to a range we already flushed */
 162     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 163         for (i = 0; i < rbuf->num_ranges; i++) {
 164             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 165                 (transfer->box.x < rbuf->ranges[i].end))
 166                 flush = TRUE;
 167
 168             if (flush) {
 169                 /* unreference this hw buffer and allocate a new one */
 170                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 171
 172                 rbuf->num_ranges = 0;
 173                 rbuf->buf = r300screen->rws->buffer_create(r300screen->rws, 16,
 174                                                       rbuf->b.b.bind,
 175                                                       rbuf->domain,
 176                                                       rbuf->b.b.width0);
 177                 break;
 178             }
 179         }
 180     }
 181 just_map:
 182     map = rws->buffer_map(rws, rbuf->buf, transfer->usage);
 183
 184     if (map == NULL)
 185         return NULL;
 186
 187     /* map_buffer() returned a pointer to the beginning of the buffer,
 188      * but transfers are expected to return a pointer to just the
 189      * region specified in the box.
 190      */
 191     return map + transfer->box.x;
 192 }
 193
 194 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 195                                                struct pipe_transfer *transfer,
 196                                                const struct pipe_box *box)
 197 {
 198     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 199     unsigned i;
 200     unsigned offset = transfer->box.x + box->x;
 201     unsigned length = box->width;
 202
 203     assert(box->x + box->width <= transfer->box.width);
 204
 205     if (rbuf->user_buffer)
 206         return;
 207
 208     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER)
 209         return;
 210
 211     /* mark the range as used */
 212     for(i = 0; i < rbuf->num_ranges; ++i) {
 213         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 214             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 215             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 216             return;
 217         }
 218     }
 219
 220     rbuf->ranges[rbuf->num_ranges].start = offset;
 221     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 222     rbuf->num_ranges++;
 223 }
 224
 225 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 226                             struct pipe_transfer *transfer )
 227 {
 228     struct r300_screen *r300screen = r300_screen(pipe->screen);
 229     struct r300_winsys_screen *rws = r300screen->rws;
 230     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 231
 232     if (rbuf->buf) {
 233         rws->buffer_unmap(rws, rbuf->buf);
 234     }
 235 }
 236
 237 struct u_resource_vtbl r300_buffer_vtbl =
 238 {
 239    u_default_resource_get_handle,      /* get_handle */
 240    r300_buffer_destroy,              /* resource_destroy */
 241    r300_buffer_is_referenced_by_cs,  /* is_buffer_referenced */
 242    u_default_get_transfer,           /* get_transfer */
 243    u_default_transfer_destroy,       /* transfer_destroy */
 244    r300_buffer_transfer_map,         /* transfer_map */
 245    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 246    r300_buffer_transfer_unmap,       /* transfer_unmap */
 247    u_default_transfer_inline_write   /* transfer_inline_write */
 248 };
 249
 250 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 251                                          const struct pipe_resource *templ)
 252 {
 253     struct r300_screen *r300screen = r300_screen(screen);
 254     struct r300_buffer *rbuf;
 255     unsigned alignment = 16;
 256
 257     rbuf = CALLOC_STRUCT(r300_buffer);
 258     if (!rbuf)
 259         goto error1;
 260
 261     rbuf->magic = R300_BUFFER_MAGIC;
 262
 263     rbuf->b.b = *templ;
 264     rbuf->b.vtbl = &r300_buffer_vtbl;
 265     pipe_reference_init(&rbuf->b.b.reference, 1);
 266     rbuf->b.b.screen = screen;
 267     rbuf->domain = R300_DOMAIN_GTT;
 268
 269     rbuf->buf = r300screen->rws->buffer_create(r300screen->rws,
 270                                           alignment,
 271                                           rbuf->b.b.bind,
 272                                           rbuf->domain,
 273                                           rbuf->b.b.width0);
 274
 275     if (!rbuf->buf)
 276         goto error2;
 277
 278     return &rbuf->b.b;
 279 error2:
 280     FREE(rbuf);
 281 error1:
 282     return NULL;
 283 }
 284
 285 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 286                                               void *ptr,
 287                                               unsigned bytes,
 288                                               unsigned bind)
 289 {
 290     struct r300_buffer *rbuf;
 291
 292     rbuf = CALLOC_STRUCT(r300_buffer);
 293     if (!rbuf)
 294         goto no_rbuf;
 295
 296     rbuf->magic = R300_BUFFER_MAGIC;
 297
 298     pipe_reference_init(&rbuf->b.b.reference, 1);
 299     rbuf->b.vtbl = &r300_buffer_vtbl;
 300     rbuf->b.b.screen = screen;
 301     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 302     rbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 303     rbuf->b.b.bind = bind;
 304     rbuf->b.b.width0 = bytes;
 305     rbuf->b.b.height0 = 1;
 306     rbuf->b.b.depth0 = 1;
 307     rbuf->domain = R300_DOMAIN_GTT;
 308
 309     rbuf->user_buffer = ptr;
 310     return &rbuf->b.b;
 311
 312 no_rbuf:
 313     return NULL;
 314 }