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 void r300_winsys_buffer_destroy(struct r300_screen *r300screen,
 120                                        struct r300_buffer *rbuf)
 121 {
 122     struct r300_winsys_screen *rws = r300screen->rws;
 123
 124     if (rbuf->buf) {
 125         rws->buffer_reference(rws, &rbuf->buf, NULL);
 126         rbuf->buf = NULL;
 127     }
 128 }
 129
 130 static void r300_buffer_destroy(struct pipe_screen *screen,
 131                                 struct pipe_resource *buf)
 132 {
 133     struct r300_screen *r300screen = r300_screen(screen);
 134     struct r300_buffer *rbuf = r300_buffer(buf);
 135
 136     r300_winsys_buffer_destroy(r300screen, rbuf);
 137     FREE(rbuf);
 138 }
 139
 140 static void *
 141 r300_buffer_transfer_map( struct pipe_context *pipe,
 142                           struct pipe_transfer *transfer )
 143 {
 144     struct r300_screen *r300screen = r300_screen(pipe->screen);
 145     struct r300_winsys_screen *rws = r300screen->rws;
 146     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 147     uint8_t *map;
 148     boolean flush = FALSE;
 149     unsigned i;
 150
 151     if (rbuf->user_buffer)
 152         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 153
 154     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER) {
 155         goto just_map;
 156     }
 157
 158     /* check if the mapping is to a range we already flushed */
 159     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 160         for (i = 0; i < rbuf->num_ranges; i++) {
 161             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 162                 (transfer->box.x < rbuf->ranges[i].end))
 163                 flush = TRUE;
 164
 165             if (flush) {
 166                 /* unreference this hw buffer and allocate a new one */
 167                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 168
 169                 rbuf->num_ranges = 0;
 170                 rbuf->buf = r300screen->rws->buffer_create(r300screen->rws, 16,
 171                                                       rbuf->b.b.bind,
 172                                                       rbuf->domain,
 173                                                       rbuf->b.b.width0);
 174                 break;
 175             }
 176         }
 177     }
 178 just_map:
 179     map = rws->buffer_map(rws, rbuf->buf, transfer->usage);
 180
 181     if (map == NULL)
 182         return NULL;
 183
 184     /* map_buffer() returned a pointer to the beginning of the buffer,
 185      * but transfers are expected to return a pointer to just the
 186      * region specified in the box.
 187      */
 188     return map + transfer->box.x;
 189 }
 190
 191 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 192                                                struct pipe_transfer *transfer,
 193                                                const struct pipe_box *box)
 194 {
 195     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 196     unsigned i;
 197     unsigned offset = transfer->box.x + box->x;
 198     unsigned length = box->width;
 199
 200     assert(box->x + box->width <= transfer->box.width);
 201
 202     if (rbuf->user_buffer)
 203         return;
 204
 205     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER)
 206         return;
 207
 208     /* mark the range as used */
 209     for(i = 0; i < rbuf->num_ranges; ++i) {
 210         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 211             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 212             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 213             return;
 214         }
 215     }
 216
 217     rbuf->ranges[rbuf->num_ranges].start = offset;
 218     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 219     rbuf->num_ranges++;
 220 }
 221
 222 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 223                             struct pipe_transfer *transfer )
 224 {
 225     struct r300_screen *r300screen = r300_screen(pipe->screen);
 226     struct r300_winsys_screen *rws = r300screen->rws;
 227     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 228
 229     if (rbuf->buf) {
 230         rws->buffer_unmap(rws, rbuf->buf);
 231     }
 232 }
 233
 234 struct u_resource_vtbl r300_buffer_vtbl =
 235 {
 236    u_default_resource_get_handle,      /* get_handle */
 237    r300_buffer_destroy,              /* resource_destroy */
 238    r300_buffer_is_referenced_by_cs,  /* is_buffer_referenced */
 239    u_default_get_transfer,           /* get_transfer */
 240    u_default_transfer_destroy,       /* transfer_destroy */
 241    r300_buffer_transfer_map,         /* transfer_map */
 242    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 243    r300_buffer_transfer_unmap,       /* transfer_unmap */
 244    u_default_transfer_inline_write   /* transfer_inline_write */
 245 };
 246
 247 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 248                                          const struct pipe_resource *templ)
 249 {
 250     struct r300_screen *r300screen = r300_screen(screen);
 251     struct r300_buffer *rbuf;
 252     unsigned alignment = 16;
 253
 254     rbuf = CALLOC_STRUCT(r300_buffer);
 255     if (!rbuf)
 256         goto error1;
 257
 258     rbuf->magic = R300_BUFFER_MAGIC;
 259
 260     rbuf->b.b = *templ;
 261     rbuf->b.vtbl = &r300_buffer_vtbl;
 262     pipe_reference_init(&rbuf->b.b.reference, 1);
 263     rbuf->b.b.screen = screen;
 264
 265     if (rbuf->b.b.bind & R300_BIND_OQBO)
 266         alignment = 4096;
 267
 268     rbuf->domain = R300_DOMAIN_GTT;
 269
 270     rbuf->buf = r300screen->rws->buffer_create(r300screen->rws,
 271                                           alignment,
 272                                           rbuf->b.b.bind,
 273                                           rbuf->domain,
 274                                           rbuf->b.b.width0);
 275
 276     if (!rbuf->buf)
 277         goto error2;
 278
 279     return &rbuf->b.b;
 280 error2:
 281     FREE(rbuf);
 282 error1:
 283     return NULL;
 284 }
 285
 286 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 287                                               void *ptr,
 288                                               unsigned bytes,
 289                                               unsigned bind)
 290 {
 291     struct r300_buffer *rbuf;
 292
 293     rbuf = CALLOC_STRUCT(r300_buffer);
 294     if (!rbuf)
 295         goto no_rbuf;
 296
 297     rbuf->magic = R300_BUFFER_MAGIC;
 298
 299     pipe_reference_init(&rbuf->b.b.reference, 1);
 300     rbuf->b.vtbl = &r300_buffer_vtbl;
 301     rbuf->b.b.screen = screen;
 302     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 303     rbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 304     rbuf->b.b.bind = bind;
 305     rbuf->b.b.width0 = bytes;
 306     rbuf->b.b.height0 = 1;
 307     rbuf->b.b.depth0 = 1;
 308     rbuf->domain = R300_DOMAIN_GTT;
 309
 310     rbuf->user_buffer = ptr;
 311     return &rbuf->b.b;
 312
 313 no_rbuf:
 314     return NULL;
 315 }