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 /* 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                              unsigned *out_offset)
  67 {
  68    struct pipe_resource *upload_buffer = NULL;
  69    unsigned index_offset = start * index_size;
  70    int ret = 0;
  71
  72     if (r300_buffer_is_user_buffer(*index_buffer)) {
  73         ret = u_upload_buffer(r300->upload_ib,
  74                               index_offset,
  75                               count * index_size,
  76                               *index_buffer,
  77                               &index_offset,
  78                               &upload_buffer);
  79         if (ret) {
  80             goto done;
  81         }
  82         *index_buffer = upload_buffer;
  83         *out_offset = index_offset / index_size;
  84     } else
  85         *out_offset = start;
  86
  87  done:
  88     //    if (upload_buffer)
  89     //  pipe_resource_reference(&upload_buffer, NULL);
  90     return ret;
  91 }
  92
  93 /* External helper, not required to implement u_resource_vtbl:
  94  */
  95 int r300_upload_user_buffers(struct r300_context *r300)
  96 {
  97     enum pipe_error ret = PIPE_OK;
  98     int i, nr;
  99
 100     nr = r300->velems->count;
 101
 102     for (i = 0; i < nr; i++) {
 103         struct pipe_vertex_buffer *vb =
 104             &r300->vertex_buffer[r300->velems->velem[i].vertex_buffer_index];
 105
 106         if (r300_buffer_is_user_buffer(vb->buffer)) {
 107             struct pipe_resource *upload_buffer = NULL;
 108             unsigned offset = 0; /*vb->buffer_offset * 4;*/
 109             unsigned size = vb->buffer->width0;
 110             unsigned upload_offset;
 111             ret = u_upload_buffer(r300->upload_vb,
 112                                   offset, size,
 113                                   vb->buffer,
 114                                   &upload_offset, &upload_buffer);
 115             if (ret)
 116                 return ret;
 117
 118             pipe_resource_reference(&vb->buffer, NULL);
 119             vb->buffer = upload_buffer;
 120             vb->buffer_offset = upload_offset;
 121         }
 122     }
 123     return ret;
 124 }
 125
 126 static void r300_buffer_destroy(struct pipe_screen *screen,
 127                                 struct pipe_resource *buf)
 128 {
 129     struct r300_screen *r300screen = r300_screen(screen);
 130     struct r300_buffer *rbuf = r300_buffer(buf);
 131     struct r300_winsys_screen *rws = r300screen->rws;
 132
 133     if (rbuf->constant_buffer)
 134         FREE(rbuf->constant_buffer);
 135
 136     if (rbuf->buf)
 137         rws->buffer_reference(rws, &rbuf->buf, NULL);
 138
 139     util_slab_free(&r300screen->pool_buffers, rbuf);
 140 }
 141
 142 static struct pipe_transfer*
 143 r300_default_get_transfer(struct pipe_context *context,
 144                           struct pipe_resource *resource,
 145                           unsigned level,
 146                           unsigned usage,
 147                           const struct pipe_box *box)
 148 {
 149    struct r300_context *r300 = r300_context(context);
 150    struct pipe_transfer *transfer =
 151          util_slab_alloc(&r300->pool_transfers);
 152
 153    transfer->resource = resource;
 154    transfer->level = level;
 155    transfer->usage = usage;
 156    transfer->box = *box;
 157    transfer->stride = 0;
 158    transfer->layer_stride = 0;
 159    transfer->data = NULL;
 160
 161    /* Note strides are zero, this is ok for buffers, but not for
 162     * textures 2d & higher at least.
 163     */
 164    return transfer;
 165 }
 166
 167 static void r300_default_transfer_destroy(struct pipe_context *pipe,
 168                                           struct pipe_transfer *transfer)
 169 {
 170    struct r300_context *r300 = r300_context(pipe);
 171    util_slab_free(&r300->pool_transfers, transfer);
 172 }
 173
 174 static void *
 175 r300_buffer_transfer_map( struct pipe_context *pipe,
 176                           struct pipe_transfer *transfer )
 177 {
 178     struct r300_context *r300 = r300_context(pipe);
 179     struct r300_screen *r300screen = r300_screen(pipe->screen);
 180     struct r300_winsys_screen *rws = r300screen->rws;
 181     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 182     uint8_t *map;
 183     boolean flush = FALSE;
 184     unsigned i;
 185
 186     if (rbuf->user_buffer)
 187         return (uint8_t *) rbuf->user_buffer + transfer->box.x;
 188     if (rbuf->constant_buffer)
 189         return (uint8_t *) rbuf->constant_buffer + transfer->box.x;
 190
 191     /* check if the mapping is to a range we already flushed */
 192     if (transfer->usage & PIPE_TRANSFER_DISCARD) {
 193         for (i = 0; i < rbuf->num_ranges; i++) {
 194             if ((transfer->box.x >= rbuf->ranges[i].start) &&
 195                 (transfer->box.x < rbuf->ranges[i].end))
 196                 flush = TRUE;
 197
 198             if (flush) {
 199                 /* unreference this hw buffer and allocate a new one */
 200                 rws->buffer_reference(rws, &rbuf->buf, NULL);
 201
 202                 rbuf->num_ranges = 0;
 203                 rbuf->buf =
 204                     r300screen->rws->buffer_create(r300screen->rws,
 205                                                    rbuf->b.b.width0, 16,
 206                                                    rbuf->b.b.bind,
 207                                                    rbuf->b.b.usage,
 208                                                    rbuf->domain);
 209                 rbuf->cs_buf =
 210                     r300screen->rws->buffer_get_cs_handle(r300screen->rws,
 211                                                           rbuf->buf);
 212                 break;
 213             }
 214         }
 215     }
 216
 217     map = rws->buffer_map(rws, rbuf->buf, r300->cs, transfer->usage);
 218
 219     if (map == NULL)
 220         return NULL;
 221
 222     /* map_buffer() returned a pointer to the beginning of the buffer,
 223      * but transfers are expected to return a pointer to just the
 224      * region specified in the box.
 225      */
 226     return map + transfer->box.x;
 227 }
 228
 229 static void r300_buffer_transfer_flush_region( struct pipe_context *pipe,
 230                                                struct pipe_transfer *transfer,
 231                                                const struct pipe_box *box)
 232 {
 233     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 234     unsigned i;
 235     unsigned offset = transfer->box.x + box->x;
 236     unsigned length = box->width;
 237
 238     assert(box->x + box->width <= transfer->box.width);
 239
 240     if (rbuf->user_buffer)
 241         return;
 242     if (rbuf->constant_buffer)
 243         return;
 244
 245     /* mark the range as used */
 246     for(i = 0; i < rbuf->num_ranges; ++i) {
 247         if(offset <= rbuf->ranges[i].end && rbuf->ranges[i].start <= (offset+box->width)) {
 248             rbuf->ranges[i].start = MIN2(rbuf->ranges[i].start, offset);
 249             rbuf->ranges[i].end   = MAX2(rbuf->ranges[i].end, (offset+length));
 250             return;
 251         }
 252     }
 253
 254     rbuf->ranges[rbuf->num_ranges].start = offset;
 255     rbuf->ranges[rbuf->num_ranges].end = offset+length;
 256     rbuf->num_ranges++;
 257 }
 258
 259 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 260                             struct pipe_transfer *transfer )
 261 {
 262     struct r300_screen *r300screen = r300_screen(pipe->screen);
 263     struct r300_winsys_screen *rws = r300screen->rws;
 264     struct r300_buffer *rbuf = r300_buffer(transfer->resource);
 265
 266     if (rbuf->buf) {
 267         rws->buffer_unmap(rws, rbuf->buf);
 268     }
 269 }
 270
 271 struct u_resource_vtbl r300_buffer_vtbl =
 272 {
 273    u_default_resource_get_handle,      /* get_handle */
 274    r300_buffer_destroy,                /* resource_destroy */
 275    r300_buffer_is_referenced_by_cs,    /* is_buffer_referenced */
 276    r300_default_get_transfer,          /* get_transfer */
 277    r300_default_transfer_destroy,      /* transfer_destroy */
 278    r300_buffer_transfer_map,           /* transfer_map */
 279    r300_buffer_transfer_flush_region,  /* transfer_flush_region */
 280    r300_buffer_transfer_unmap,         /* transfer_unmap */
 281    u_default_transfer_inline_write     /* transfer_inline_write */
 282 };
 283
 284 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 285                                          const struct pipe_resource *templ)
 286 {
 287     struct r300_screen *r300screen = r300_screen(screen);
 288     struct r300_buffer *rbuf;
 289     unsigned alignment = 16;
 290
 291     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 292
 293     rbuf->magic = R300_BUFFER_MAGIC;
 294
 295     rbuf->b.b = *templ;
 296     rbuf->b.vtbl = &r300_buffer_vtbl;
 297     pipe_reference_init(&rbuf->b.b.reference, 1);
 298     rbuf->b.b.screen = screen;
 299     rbuf->domain = R300_DOMAIN_GTT;
 300     rbuf->num_ranges = 0;
 301     rbuf->buf = NULL;
 302     rbuf->constant_buffer = NULL;
 303     rbuf->user_buffer = NULL;
 304
 305     /* Alloc constant buffers in RAM. */
 306     if (templ->bind & PIPE_BIND_CONSTANT_BUFFER) {
 307         rbuf->constant_buffer = MALLOC(templ->width0);
 308         return &rbuf->b.b;
 309     }
 310
 311     rbuf->buf =
 312         r300screen->rws->buffer_create(r300screen->rws,
 313                                        rbuf->b.b.width0, alignment,
 314                                        rbuf->b.b.bind, rbuf->b.b.usage,
 315                                        rbuf->domain);
 316     rbuf->cs_buf =
 317         r300screen->rws->buffer_get_cs_handle(r300screen->rws, rbuf->buf);
 318
 319     if (!rbuf->buf) {
 320         util_slab_free(&r300screen->pool_buffers, rbuf);
 321         return NULL;
 322     }
 323
 324     return &rbuf->b.b;
 325 }
 326
 327 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 328                                               void *ptr,
 329                                               unsigned bytes,
 330                                               unsigned bind)
 331 {
 332     struct r300_screen *r300screen = r300_screen(screen);
 333     struct r300_buffer *rbuf;
 334
 335     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 336
 337     rbuf->magic = R300_BUFFER_MAGIC;
 338
 339     pipe_reference_init(&rbuf->b.b.reference, 1);
 340     rbuf->b.vtbl = &r300_buffer_vtbl;
 341     rbuf->b.b.screen = screen;
 342     rbuf->b.b.target = PIPE_BUFFER;
 343     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 344     rbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 345     rbuf->b.b.bind = bind;
 346     rbuf->b.b.width0 = bytes;
 347     rbuf->b.b.height0 = 1;
 348     rbuf->b.b.depth0 = 1;
 349     rbuf->b.b.array_size = 1;
 350     rbuf->b.b.flags = 0;
 351     rbuf->domain = R300_DOMAIN_GTT;
 352     rbuf->num_ranges = 0;
 353     rbuf->buf = NULL;
 354     rbuf->constant_buffer = NULL;
 355     rbuf->user_buffer = ptr;
 356     return &rbuf->b.b;
 357 }