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     boolean flushed;
  66     uint8_t *ptr = r300_buffer(*index_buffer)->user_buffer;
  67
  68     *index_buffer = NULL;
  69
  70     u_upload_data(r300->upload_ib,
  71                   0, count * index_size,
  72                   ptr + (*start * index_size),
  73                   &index_offset,
  74                   index_buffer, &flushed);
  75
  76     *start = index_offset / index_size;
  77 }
  78
  79 void r300_upload_user_buffers(struct r300_context *r300)
  80 {
  81     int i, nr = r300->velems->count;
  82     boolean flushed;
  83
  84     for (i = 0; i < nr; i++) {
  85         struct pipe_vertex_buffer *vb =
  86             &r300->vertex_buffer[r300->velems->velem[i].vertex_buffer_index];
  87
  88         if (r300_buffer_is_user_buffer(vb->buffer)) {
  89             u_upload_data(r300->upload_vb,
  90                           0, vb->buffer->width0,
  91                           r300_buffer(vb->buffer)->user_buffer,
  92                           &vb->buffer_offset, &vb->buffer, &flushed);
  93
  94             r300->validate_buffers = TRUE;
  95             r300->vertex_arrays_dirty = TRUE;
  96         }
  97     }
  98 }
  99
 100 static void r300_buffer_destroy(struct pipe_screen *screen,
 101                                 struct pipe_resource *buf)
 102 {
 103     struct r300_screen *r300screen = r300_screen(screen);
 104     struct r300_buffer *rbuf = r300_buffer(buf);
 105     struct r300_winsys_screen *rws = r300screen->rws;
 106
 107     if (rbuf->constant_buffer)
 108         FREE(rbuf->constant_buffer);
 109
 110     if (rbuf->buf)
 111         rws->buffer_reference(rws, &rbuf->buf, NULL);
 112
 113     util_slab_free(&r300screen->pool_buffers, rbuf);
 114 }
 115
 116 static struct pipe_transfer*
 117 r300_buffer_get_transfer(struct pipe_context *context,
 118                          struct pipe_resource *resource,
 119                          unsigned level,
 120                          unsigned usage,
 121                          const struct pipe_box *box)
 122 {
 123    struct r300_context *r300 = r300_context(context);
 124    struct pipe_transfer *transfer =
 125          util_slab_alloc(&r300->pool_transfers);
 126
 127    transfer->resource = resource;
 128    transfer->level = level;
 129    transfer->usage = usage;
 130    transfer->box = *box;
 131    transfer->stride = 0;
 132    transfer->layer_stride = 0;
 133    transfer->data = NULL;
 134
 135    /* Note strides are zero, this is ok for buffers, but not for
 136     * textures 2d & higher at least.
 137     */
 138    return transfer;
 139 }
 140
 141 static void r300_buffer_transfer_destroy(struct pipe_context *pipe,
 142                                          struct pipe_transfer *transfer)
 143 {
 144    struct r300_context *r300 = r300_context(pipe);
 145    util_slab_free(&r300->pool_transfers, transfer);
 146 }
 147
 148 static void *
 149 r300_buffer_transfer_map( struct pipe_context *pipe,
 150                           struct pipe_transfer *transfer )
 151 {
 152     struct r300_context *r300 = r300_context(pipe);
 153     struct r300_screen *r300screen = r300_screen(pipe->screen);
 154     struct r300_winsys_screen *rws = r300screen->rws;
 155     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 156     uint8_t *map;
 157     boolean flush = FALSE;
 158     unsigned i;
 159
 160     if (rbuf->user_buffer)
 161         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 162     if (rbuf->constant_buffer)
 163         return (uint8_t *) rbuf->constant_buffer + transfer->box.x;
 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->buf =
 178                     r300screen->rws->buffer_create(r300screen->rws,
 179                                                    rbuf->b.b.width0, 16,
 180                                                    rbuf->b.b.bind,
 181                                                    rbuf->b.b.usage,
 182                                                    rbuf->domain);
 183                 rbuf->cs_buf =
 184                     r300screen->rws->buffer_get_cs_handle(r300screen->rws,
 185                                                           rbuf->buf);
 186                 break;
 187             }
 188         }
 189     }
 190
 191     map = rws->buffer_map(rws, rbuf->buf, r300->cs, transfer->usage);
 192
 193     if (map == NULL)
 194         return NULL;
 195
 196     /* map_buffer() returned a pointer to the beginning of the buffer,
 197      * but transfers are expected to return a pointer to just the
 198      * region specified in the box.
 199      */
 200     return map + transfer->box.x;
 201 }
 202
 203 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 204                                                struct pipe_transfer *transfer,
 205                                                const struct pipe_box *box)
 206 {
 207     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 208     unsigned i;
 209     unsigned offset = transfer->box.x + box->x;
 210     unsigned length = box->width;
 211
 212     assert(box->x + box->width <= transfer->box.width);
 213
 214     if (rbuf->user_buffer)
 215         return;
 216     if (rbuf->constant_buffer)
 217         return;
 218
 219     /* mark the range as used */
 220     for(i = 0; i < rbuf->num_ranges; ++i) {
 221         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 222             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 223             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 224             return;
 225         }
 226     }
 227
 228     rbuf->ranges[rbuf->num_ranges].start = offset;
 229     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 230     rbuf->num_ranges++;
 231 }
 232
 233 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 234                             struct pipe_transfer *transfer )
 235 {
 236     struct r300_screen *r300screen = r300_screen(pipe->screen);
 237     struct r300_winsys_screen *rws = r300screen->rws;
 238     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 239
 240     if (rbuf->buf) {
 241         rws->buffer_unmap(rws, rbuf->buf);
 242     }
 243 }
 244
 245 static void r300_buffer_transfer_inline_write(struct pipe_context *pipe,
 246                                               struct pipe_resource *resource,
 247                                               unsigned level,
 248                                               unsigned usage,
 249                                               const struct pipe_box *box,
 250                                               const void *data,
 251                                               unsigned stride,
 252                                               unsigned layer_stride)
 253 {
 254     struct r300_context *r300 = r300_context(pipe);
 255     struct r300_winsys_screen *rws = r300->screen->rws;
 256     struct r300_buffer *rbuf = r300_buffer(resource);
 257     uint8_t *map = NULL;
 258
 259     if (rbuf->constant_buffer) {
 260         memcpy(rbuf->constant_buffer + box->x, data, box->width);
 261         return;
 262     }
 263     assert(rbuf->user_buffer == NULL);
 264
 265     map = rws->buffer_map(rws, rbuf->buf, r300->cs,
 266                           PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD | usage);
 267
 268     memcpy(map + box->x, data, box->width);
 269
 270     rws->buffer_unmap(rws, rbuf->buf);
 271 }
 272
 273 struct u_resource_vtbl r300_buffer_vtbl =
 274 {
 275    u_default_resource_get_handle,      /* get_handle */
 276    r300_buffer_destroy,                /* resource_destroy */
 277    r300_buffer_is_referenced_by_cs,    /* is_buffer_referenced */
 278    r300_buffer_get_transfer,           /* get_transfer */
 279    r300_buffer_transfer_destroy,       /* transfer_destroy */
 280    r300_buffer_transfer_map,           /* transfer_map */
 281    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 282    r300_buffer_transfer_unmap,         /* transfer_unmap */
 283    r300_buffer_transfer_inline_write   /* transfer_inline_write */
 284 };
 285
 286 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 287                                          const struct pipe_resource *templ)
 288 {
 289     struct r300_screen *r300screen = r300_screen(screen);
 290     struct r300_buffer *rbuf;
 291     unsigned alignment = 16;
 292
 293     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 294
 295     rbuf->magic = R300_BUFFER_MAGIC;
 296
 297     rbuf->b.b = *templ;
 298     rbuf->b.vtbl = &r300_buffer_vtbl;
 299     pipe_reference_init(&rbuf->b.b.reference, 1);
 300     rbuf->b.b.screen = screen;
 301     rbuf->domain = R300_DOMAIN_GTT;
 302     rbuf->num_ranges = 0;
 303     rbuf->buf = NULL;
 304     rbuf->constant_buffer = NULL;
 305     rbuf->user_buffer = NULL;
 306
 307     /* Alloc constant buffers in RAM. */
 308     if (templ->bind & PIPE_BIND_CONSTANT_BUFFER) {
 309         rbuf->constant_buffer = MALLOC(templ->width0);
 310         return &rbuf->b.b;
 311     }
 312
 313     rbuf->buf =
 314         r300screen->rws->buffer_create(r300screen->rws,
 315                                        rbuf->b.b.width0, alignment,
 316                                        rbuf->b.b.bind, rbuf->b.b.usage,
 317                                        rbuf->domain);
 318     rbuf->cs_buf =
 319         r300screen->rws->buffer_get_cs_handle(r300screen->rws, rbuf->buf);
 320
 321     if (!rbuf->buf) {
 322         util_slab_free(&r300screen->pool_buffers, rbuf);
 323         return NULL;
 324     }
 325
 326     return &rbuf->b.b;
 327 }
 328
 329 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 330                                               void *ptr,
 331                                               unsigned bytes,
 332                                               unsigned bind)
 333 {
 334     struct r300_screen *r300screen = r300_screen(screen);
 335     struct r300_buffer *rbuf;
 336
 337     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 338
 339     rbuf->magic = R300_BUFFER_MAGIC;
 340
 341     pipe_reference_init(&rbuf->b.b.reference, 1);
 342     rbuf->b.vtbl = &r300_buffer_vtbl;
 343     rbuf->b.b.screen = screen;
 344     rbuf->b.b.target = PIPE_BUFFER;
 345     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 346     rbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 347     rbuf->b.b.bind = bind;
 348     rbuf->b.b.width0 = bytes;
 349     rbuf->b.b.height0 = 1;
 350     rbuf->b.b.depth0 = 1;
 351     rbuf->b.b.array_size = 1;
 352     rbuf->b.b.flags = 0;
 353     rbuf->domain = R300_DOMAIN_GTT;
 354     rbuf->num_ranges = 0;
 355     rbuf->buf = NULL;
 356     rbuf->constant_buffer = NULL;
 357     rbuf->user_buffer = ptr;
 358     return &rbuf->b.b;
 359 }