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->vertex_buffer_count;
  97
  98     for (i = 0; i < nr; i++) {
  99         if (r300_buffer_is_user_buffer(r300->vertex_buffer[i].buffer)) {
 100             struct pipe_resource *upload_buffer = NULL;
 101             unsigned offset = 0; /*r300->vertex_buffer[i].buffer_offset * 4;*/
 102             unsigned size = r300->vertex_buffer[i].buffer->width0;
 103             unsigned upload_offset;
 104             ret = u_upload_buffer(r300->upload_vb,
 105                                   offset, size,
 106                                   r300->vertex_buffer[i].buffer,
 107                                   &upload_offset, &upload_buffer);
 108             if (ret)
 109                 return ret;
 110
 111             pipe_resource_reference(&r300->vertex_buffer[i].buffer, NULL);
 112             r300->vertex_buffer[i].buffer = upload_buffer;
 113             r300->vertex_buffer[i].buffer_offset = upload_offset;
 114         }
 115     }
 116     return ret;
 117 }
 118
 119 static struct r300_winsys_buffer *
 120 r300_winsys_buffer_create(struct r300_screen *r300screen,
 121                           unsigned alignment,
 122                           unsigned usage,
 123                           unsigned size)
 124 {
 125     struct r300_winsys_screen *rws = r300screen->rws;
 126     struct r300_winsys_buffer *buf;
 127
 128     buf = rws->buffer_create(rws, alignment, usage, size);
 129     return buf;
 130 }
 131
 132 static void r300_winsys_buffer_destroy(struct r300_screen *r300screen,
 133                                        struct r300_buffer *rbuf)
 134 {
 135     struct r300_winsys_screen *rws = r300screen->rws;
 136
 137     if (rbuf->buf) {
 138         rws->buffer_reference(rws, &rbuf->buf, NULL);
 139         rbuf->buf = NULL;
 140     }
 141 }
 142
 143 static void r300_buffer_destroy(struct pipe_screen *screen,
 144                                 struct pipe_resource *buf)
 145 {
 146     struct r300_screen *r300screen = r300_screen(screen);
 147     struct r300_buffer *rbuf = r300_buffer(buf);
 148
 149     r300_winsys_buffer_destroy(r300screen, rbuf);
 150     FREE(rbuf);
 151 }
 152
 153 static void *
 154 r300_buffer_transfer_map( struct pipe_context *pipe,
 155                           struct pipe_transfer *transfer )
 156 {
 157     struct r300_screen *r300screen = r300_screen(pipe->screen);
 158     struct r300_winsys_screen *rws = r300screen->rws;
 159     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 160     uint8_t *map;
 161     boolean flush = FALSE;
 162     unsigned i;
 163
 164     if (rbuf->user_buffer)
 165         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 166
 167     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER) {
 168         goto just_map;
 169     }
 170
 171     /* check if the mapping is to a range we already flushed */
 172     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 173         for (i = 0; i < rbuf->num_ranges; i++) {
 174             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 175                 (transfer->box.x < rbuf->ranges[i].end))
 176                 flush = TRUE;
 177
 178             if (flush) {
 179                 /* unreference this hw buffer and allocate a new one */
 180                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 181
 182                 rbuf->num_ranges = 0;
 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, transfer->usage);
 193
 194     if (map == NULL)
 195         return NULL;
 196
 197     /* map_buffer() returned a pointer to the beginning of the buffer,
 198      * but transfers are expected to return a pointer to just the
 199      * region specified in the box.
 200      */
 201     return map + transfer->box.x;
 202 }
 203
 204 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 205                                                struct pipe_transfer *transfer,
 206                                                const struct pipe_box *box)
 207 {
 208     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 209     unsigned i;
 210     unsigned offset = transfer->box.x + box->x;
 211     unsigned length = box->width;
 212
 213     assert(box->x + box->width <= transfer->box.width);
 214
 215     if (rbuf->user_buffer)
 216         return;
 217
 218     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER)
 219         return;
 220
 221     /* mark the range as used */
 222     for(i = 0; i < rbuf->num_ranges; ++i) {
 223         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 224             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 225             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 226             return;
 227         }
 228     }
 229
 230     rbuf->ranges[rbuf->num_ranges].start = offset;
 231     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 232     rbuf->num_ranges++;
 233 }
 234
 235 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 236                             struct pipe_transfer *transfer )
 237 {
 238     struct r300_screen *r300screen = r300_screen(pipe->screen);
 239     struct r300_winsys_screen *rws = r300screen->rws;
 240     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 241
 242     if (rbuf->buf) {
 243         rws->buffer_unmap(rws, rbuf->buf);
 244     }
 245 }
 246
 247 struct u_resource_vtbl r300_buffer_vtbl =
 248 {
 249    u_default_resource_get_handle,      /* get_handle */
 250    r300_buffer_destroy,              /* resource_destroy */
 251    r300_buffer_is_referenced_by_cs,  /* is_buffer_referenced */
 252    u_default_get_transfer,           /* get_transfer */
 253    u_default_transfer_destroy,       /* transfer_destroy */
 254    r300_buffer_transfer_map,         /* transfer_map */
 255    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 256    r300_buffer_transfer_unmap,       /* transfer_unmap */
 257    u_default_transfer_inline_write   /* transfer_inline_write */
 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 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 297                                               void *ptr,
 298                                               unsigned bytes,
 299                                               unsigned bind)
 300 {
 301     struct r300_buffer *rbuf;
 302
 303     rbuf = CALLOC_STRUCT(r300_buffer);
 304     if (!rbuf)
 305         goto no_rbuf;
 306
 307     rbuf->magic = R300_BUFFER_MAGIC;
 308
 309     pipe_reference_init(&rbuf->b.b.reference, 1);
 310     rbuf->b.vtbl = &r300_buffer_vtbl;
 311     rbuf->b.b.screen = screen;
 312     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 313     rbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 314     rbuf->b.b.bind = bind;
 315     rbuf->b.b.width0 = bytes;
 316     rbuf->b.b.height0 = 1;
 317     rbuf->b.b.depth0 = 1;
 318
 319     rbuf->user_buffer = ptr;
 320     return &rbuf->b.b;
 321
 322 no_rbuf:
 323     return NULL;
 324 }