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 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 implement 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         if (r300_buffer_is_user_buffer(r300->vertex_buffer[i].buffer)) {
  94             struct pipe_resource *upload_buffer = NULL;
  95             unsigned offset = 0; /*r300->vertex_buffer[i].buffer_offset * 4;*/
  96             unsigned size = r300->vertex_buffer[i].buffer->width0;
  97             unsigned upload_offset;
  98             ret = u_upload_buffer(r300->upload_vb,
  99                                   offset, size,
 100                                   r300->vertex_buffer[i].buffer,
 101                                   &upload_offset, &upload_buffer);
 102             if (ret)
 103                 return ret;
 104
 105             pipe_resource_reference(&r300->vertex_buffer[i].buffer, NULL);
 106             r300->vertex_buffer[i].buffer = upload_buffer;
 107             r300->vertex_buffer[i].buffer_offset = upload_offset;
 108         }
 109     }
 110     return ret;
 111 }
 112
 113 static struct r300_winsys_buffer *
 114 r300_winsys_buffer_create(struct r300_screen *r300screen,
 115                           unsigned alignment,
 116                           unsigned usage,
 117                           unsigned size)
 118 {
 119     struct r300_winsys_screen *rws = r300screen->rws;
 120     struct r300_winsys_buffer *buf;
 121
 122     buf = rws->buffer_create(rws, alignment, usage, size);
 123     return buf;
 124 }
 125
 126 static void r300_winsys_buffer_destroy(struct r300_screen *r300screen,
 127                                        struct r300_buffer *rbuf)
 128 {
 129     struct r300_winsys_screen *rws = r300screen->rws;
 130
 131     if (rbuf->buf) {
 132         rws->buffer_reference(rws, &rbuf->buf, NULL);
 133         rbuf->buf = NULL;
 134     }
 135 }
 136
 137 static void r300_buffer_destroy(struct pipe_screen *screen,
 138                                 struct pipe_resource *buf)
 139 {
 140     struct r300_screen *r300screen = r300_screen(screen);
 141     struct r300_buffer *rbuf = r300_buffer(buf);
 142
 143     r300_winsys_buffer_destroy(r300screen, rbuf);
 144     FREE(rbuf);
 145 }
 146
 147 static void *
 148 r300_buffer_transfer_map( struct pipe_context *pipe,
 149                           struct pipe_transfer *transfer )
 150 {
 151     struct r300_screen *r300screen = r300_screen(pipe->screen);
 152     struct r300_winsys_screen *rws = r300screen->rws;
 153     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 154     uint8_t *map;
 155     boolean flush = FALSE;
 156     unsigned i;
 157
 158     if (rbuf->user_buffer)
 159         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 160
 161     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER) {
 162         goto just_map;
 163     }
 164
 165     /* check if the mapping is to a range we already flushed */
 166     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 167         for (i = 0; i < rbuf->num_ranges; i++) {
 168             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 169                 (transfer->box.x < rbuf->ranges[i].end))
 170                 flush = TRUE;
 171
 172             if (flush) {
 173                 /* unreference this hw buffer and allocate a new one */
 174                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 175
 176                 rbuf->num_ranges = 0;
 177                 rbuf->map = NULL;
 178                 rbuf->buf = r300_winsys_buffer_create(r300screen,
 179                                                       16,
 180                                                       rbuf->b.b.bind, /* XXX */
 181                                                       rbuf->b.b.width0);
 182                 break;
 183             }
 184         }
 185     }
 186 just_map:
 187     map = rws->buffer_map(rws, rbuf->buf, transfer->usage);
 188
 189     if (map == NULL)
 190         return NULL;
 191
 192     /* map_buffer() returned a pointer to the beginning of the buffer,
 193      * but transfers are expected to return a pointer to just the
 194      * region specified in the box.
 195      */
 196     return map + transfer->box.x;
 197 }
 198
 199 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 200                                                struct pipe_transfer *transfer,
 201                                                const struct pipe_box *box)
 202 {
 203     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 204     unsigned i;
 205     unsigned offset = transfer->box.x + box->x;
 206     unsigned length = box->width;
 207
 208     assert(box->x + box->width <= transfer->box.width);
 209
 210     if (rbuf->user_buffer)
 211         return;
 212
 213     if (rbuf->b.b.bind & PIPE_BIND_CONSTANT_BUFFER)
 214         return;
 215
 216     /* mark the range as used */
 217     for(i = 0; i < rbuf->num_ranges; ++i) {
 218         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 219             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 220             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 221             return;
 222         }
 223     }
 224
 225     rbuf->ranges[rbuf->num_ranges].start = offset;
 226     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 227     rbuf->num_ranges++;
 228 }
 229
 230 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 231                             struct pipe_transfer *transfer )
 232 {
 233     struct r300_screen *r300screen = r300_screen(pipe->screen);
 234     struct r300_winsys_screen *rws = r300screen->rws;
 235     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 236
 237     if (rbuf->buf) {
 238         rws->buffer_unmap(rws, rbuf->buf);
 239     }
 240 }
 241
 242 struct u_resource_vtbl r300_buffer_vtbl =
 243 {
 244    u_default_resource_get_handle,      /* get_handle */
 245    r300_buffer_destroy,              /* resource_destroy */
 246    r300_buffer_is_referenced,        /* is_buffer_referenced */
 247    u_default_get_transfer,           /* get_transfer */
 248    u_default_transfer_destroy,       /* transfer_destroy */
 249    r300_buffer_transfer_map,         /* transfer_map */
 250    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 251    r300_buffer_transfer_unmap,       /* transfer_unmap */
 252    u_default_transfer_inline_write   /* transfer_inline_write */
 253 };
 254
 255 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 256                                          const struct pipe_resource *templ)
 257 {
 258     struct r300_screen *r300screen = r300_screen(screen);
 259     struct r300_buffer *rbuf;
 260     unsigned alignment = 16;
 261
 262     rbuf = CALLOC_STRUCT(r300_buffer);
 263     if (!rbuf)
 264         goto error1;
 265
 266     rbuf->magic = R300_BUFFER_MAGIC;
 267
 268     rbuf->b.b = *templ;
 269     rbuf->b.vtbl = &r300_buffer_vtbl;
 270     pipe_reference_init(&rbuf->b.b.reference, 1);
 271     rbuf->b.b.screen = screen;
 272
 273     if (rbuf->b.b.bind & R300_BIND_OQBO)
 274         alignment = 4096;
 275
 276     rbuf->buf = r300_winsys_buffer_create(r300screen,
 277                                           alignment,
 278                                           rbuf->b.b.bind,
 279                                           rbuf->b.b.width0);
 280
 281     if (!rbuf->buf)
 282         goto error2;
 283
 284     return &rbuf->b.b;
 285 error2:
 286     FREE(rbuf);
 287 error1:
 288     return NULL;
 289 }
 290
 291 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 292                                               void *ptr,
 293                                               unsigned bytes,
 294                                               unsigned bind)
 295 {
 296     struct r300_buffer *rbuf;
 297
 298     rbuf = CALLOC_STRUCT(r300_buffer);
 299     if (!rbuf)
 300         goto no_rbuf;
 301
 302     rbuf->magic = R300_BUFFER_MAGIC;
 303
 304     pipe_reference_init(&rbuf->b.b.reference, 1);
 305     rbuf->b.vtbl = &r300_buffer_vtbl;
 306     rbuf->b.b.screen = screen;
 307     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 308     rbuf->b.b._usage = PIPE_USAGE_IMMUTABLE;
 309     rbuf->b.b.bind = bind;
 310     rbuf->b.b.width0 = bytes;
 311     rbuf->b.b.height0 = 1;
 312     rbuf->b.b.depth0 = 1;
 313
 314     rbuf->user_buffer = ptr;
 315     return &rbuf->b.b;
 316
 317 no_rbuf:
 318     return NULL;
 319 }