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->cs_is_buffer_referenced(r300->cs, rbuf->cs_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 level, int layer)
  55 {
  56     return r300_buffer_is_referenced(context, buf, R300_REF_CS);
  57 }
  58
  59 void r300_upload_index_buffer(struct r300_context *r300,
  60                               struct pipe_resource **index_buffer,
  61                               unsigned index_size, unsigned *start,
  62                               unsigned count)
  63 {
  64     unsigned index_offset;
  65     uint8_t *ptr = r300_buffer(*index_buffer)->user_buffer;
  66
  67     *index_buffer = NULL;
  68
  69     u_upload_data(r300->upload_ib,
  70                   count * index_size,
  71                   ptr + (*start * index_size),
  72                   &index_offset,
  73                   index_buffer);
  74
  75     *start = index_offset / index_size;
  76 }
  77
  78 void r300_upload_user_buffers(struct r300_context *r300)
  79 {
  80     int i, nr = r300->velems->count;
  81
  82     for (i = 0; i < nr; i++) {
  83         struct pipe_vertex_buffer *vb =
  84             &r300->vertex_buffer[r300->velems->velem[i].vertex_buffer_index];
  85
  86         if (r300_buffer_is_user_buffer(vb->buffer)) {
  87             u_upload_data(r300->upload_vb,
  88                           vb->buffer->width0,
  89                           r300_buffer(vb->buffer)->user_buffer,
  90                           &vb->buffer_offset, &vb->buffer);
  91
  92             r300->validate_buffers = TRUE;
  93         }
  94     }
  95 }
  96
  97 static void r300_buffer_destroy(struct pipe_screen *screen,
  98                                 struct pipe_resource *buf)
  99 {
 100     struct r300_screen *r300screen = r300_screen(screen);
 101     struct r300_buffer *rbuf = r300_buffer(buf);
 102     struct r300_winsys_screen *rws = r300screen->rws;
 103
 104     if (rbuf->constant_buffer)
 105         FREE(rbuf->constant_buffer);
 106
 107     if (rbuf->buf)
 108         rws->buffer_reference(rws, &rbuf->buf, NULL);
 109
 110     util_slab_free(&r300screen->pool_buffers, rbuf);
 111 }
 112
 113 static struct pipe_transfer*
 114 r300_buffer_get_transfer(struct pipe_context *context,
 115                          struct pipe_resource *resource,
 116                          unsigned level,
 117                          unsigned usage,
 118                          const struct pipe_box *box)
 119 {
 120    struct r300_context *r300 = r300_context(context);
 121    struct pipe_transfer *transfer =
 122          util_slab_alloc(&r300->pool_transfers);
 123
 124    transfer->resource = resource;
 125    transfer->level = level;
 126    transfer->usage = usage;
 127    transfer->box = *box;
 128    transfer->stride = 0;
 129    transfer->layer_stride = 0;
 130    transfer->data = NULL;
 131
 132    /* Note strides are zero, this is ok for buffers, but not for
 133     * textures 2d & higher at least.
 134     */
 135    return transfer;
 136 }
 137
 138 static void r300_buffer_transfer_destroy(struct pipe_context *pipe,
 139                                          struct pipe_transfer *transfer)
 140 {
 141    struct r300_context *r300 = r300_context(pipe);
 142    util_slab_free(&r300->pool_transfers, transfer);
 143 }
 144
 145 static void *
 146 r300_buffer_transfer_map( struct pipe_context *pipe,
 147                           struct pipe_transfer *transfer )
 148 {
 149     struct r300_context *r300 = r300_context(pipe);
 150     struct r300_screen *r300screen = r300_screen(pipe->screen);
 151     struct r300_winsys_screen *rws = r300screen->rws;
 152     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 153     uint8_t *map;
 154     boolean flush = FALSE;
 155     unsigned i;
 156
 157     if (rbuf->user_buffer)
 158         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 159     if (rbuf->constant_buffer)
 160         return (uint8_t *) rbuf->constant_buffer + transfer->box.x;
 161
 162     /* check if the mapping is to a range we already flushed */
 163     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 164         for (i = 0; i < rbuf->num_ranges; i++) {
 165             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 166                 (transfer->box.x < rbuf->ranges[i].end))
 167                 flush = TRUE;
 168
 169             if (flush) {
 170                 /* unreference this hw buffer and allocate a new one */
 171                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 172
 173                 rbuf->num_ranges = 0;
 174                 rbuf->buf =
 175                     r300screen->rws->buffer_create(r300screen->rws,
 176                                                    rbuf->b.b.width0, 16,
 177                                                    rbuf->b.b.bind,
 178                                                    rbuf->b.b.usage,
 179                                                    rbuf->domain);
 180                 rbuf->cs_buf =
 181                     r300screen->rws->buffer_get_cs_handle(r300screen->rws,
 182                                                           rbuf->buf);
 183                 break;
 184             }
 185         }
 186     }
 187
 188     map = rws->buffer_map(rws, rbuf->buf, r300->cs, transfer->usage);
 189
 190     if (map == NULL)
 191         return NULL;
 192
 193     /* map_buffer() returned a pointer to the beginning of the buffer,
 194      * but transfers are expected to return a pointer to just the
 195      * region specified in the box.
 196      */
 197     return map + transfer->box.x;
 198 }
 199
 200 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 201                                                struct pipe_transfer *transfer,
 202                                                const struct pipe_box *box)
 203 {
 204     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 205     unsigned i;
 206     unsigned offset = transfer->box.x + box->x;
 207     unsigned length = box->width;
 208
 209     assert(box->x + box->width <= transfer->box.width);
 210
 211     if (rbuf->user_buffer)
 212         return;
 213     if (rbuf->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 static void r300_buffer_transfer_inline_write(struct pipe_context *pipe,
 243                                               struct pipe_resource *resource,
 244                                               unsigned level,
 245                                               unsigned usage,
 246                                               const struct pipe_box *box,
 247                                               const void *data,
 248                                               unsigned stride,
 249                                               unsigned layer_stride)
 250 {
 251     struct r300_buffer *rbuf = r300_buffer(resource);
 252     struct pipe_transfer *transfer = NULL;
 253     uint8_t *map = NULL;
 254
 255     if (rbuf->constant_buffer) {
 256         memcpy(rbuf->constant_buffer + box->x, data, box->width);
 257         return;
 258     }
 259
 260     transfer = r300_buffer_get_transfer(pipe, resource, 0,
 261                         PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD, box);
 262     map = r300_buffer_transfer_map(pipe, transfer);
 263
 264     memcpy(map, data, box->width);
 265
 266     r300_buffer_transfer_unmap(pipe, transfer);
 267     r300_buffer_transfer_destroy(pipe, transfer);
 268 }
 269
 270 struct u_resource_vtbl r300_buffer_vtbl =
 271 {
 272    u_default_resource_get_handle,      /* get_handle */
 273    r300_buffer_destroy,                /* resource_destroy */
 274    r300_buffer_is_referenced_by_cs,    /* is_buffer_referenced */
 275    r300_buffer_get_transfer,           /* get_transfer */
 276    r300_buffer_transfer_destroy,       /* transfer_destroy */
 277    r300_buffer_transfer_map,           /* transfer_map */
 278    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 279    r300_buffer_transfer_unmap,         /* transfer_unmap */
 280    r300_buffer_transfer_inline_write   /* transfer_inline_write */
 281 };
 282
 283 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 284                                          const struct pipe_resource *templ)
 285 {
 286     struct r300_screen *r300screen = r300_screen(screen);
 287     struct r300_buffer *rbuf;
 288     unsigned alignment = 16;
 289
 290     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 291
 292     rbuf->magic = R300_BUFFER_MAGIC;
 293
 294     rbuf->b.b = *templ;
 295     rbuf->b.vtbl = &r300_buffer_vtbl;
 296     pipe_reference_init(&rbuf->b.b.reference, 1);
 297     rbuf->b.b.screen = screen;
 298     rbuf->domain = R300_DOMAIN_GTT;
 299     rbuf->num_ranges = 0;
 300     rbuf->buf = NULL;
 301     rbuf->constant_buffer = NULL;
 302     rbuf->user_buffer = NULL;
 303
 304     /* Alloc constant buffers in RAM. */
 305     if (templ->bind & PIPE_BIND_CONSTANT_BUFFER) {
 306         rbuf->constant_buffer = MALLOC(templ->width0);
 307         return &rbuf->b.b;
 308     }
 309
 310     rbuf->buf =
 311         r300screen->rws->buffer_create(r300screen->rws,
 312                                        rbuf->b.b.width0, alignment,
 313                                        rbuf->b.b.bind, rbuf->b.b.usage,
 314                                        rbuf->domain);
 315     rbuf->cs_buf =
 316         r300screen->rws->buffer_get_cs_handle(r300screen->rws, rbuf->buf);
 317
 318     if (!rbuf->buf) {
 319         util_slab_free(&r300screen->pool_buffers, rbuf);
 320         return NULL;
 321     }
 322
 323     return &rbuf->b.b;
 324 }
 325
 326 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 327                                               void *ptr,
 328                                               unsigned bytes,
 329                                               unsigned bind)
 330 {
 331     struct r300_screen *r300screen = r300_screen(screen);
 332     struct r300_buffer *rbuf;
 333
 334     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 335
 336     rbuf->magic = R300_BUFFER_MAGIC;
 337
 338     pipe_reference_init(&rbuf->b.b.reference, 1);
 339     rbuf->b.vtbl = &r300_buffer_vtbl;
 340     rbuf->b.b.screen = screen;
 341     rbuf->b.b.target = PIPE_BUFFER;
 342     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 343     rbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 344     rbuf->b.b.bind = bind;
 345     rbuf->b.b.width0 = bytes;
 346     rbuf->b.b.height0 = 1;
 347     rbuf->b.b.depth0 = 1;
 348     rbuf->b.b.array_size = 1;
 349     rbuf->b.b.flags = 0;
 350     rbuf->domain = R300_DOMAIN_GTT;
 351     rbuf->num_ranges = 0;
 352     rbuf->buf = NULL;
 353     rbuf->constant_buffer = NULL;
 354     rbuf->user_buffer = ptr;
 355     return &rbuf->b.b;
 356 }