src/gallium/drivers/svga/svga_resource_buffer.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "svga_cmd.h"
  27
  28 #include "pipe/p_state.h"
  29 #include "pipe/p_defines.h"
  30 #include "util/u_inlines.h"
  31 #include "os/os_thread.h"
  32 #include "util/u_math.h"
  33 #include "util/u_memory.h"
  34
  35 #include "svga_context.h"
  36 #include "svga_screen.h"
  37 #include "svga_resource_buffer.h"
  38 #include "svga_resource_buffer_upload.h"
  39 #include "svga_winsys.h"
  40 #include "svga_debug.h"
  41
  42
  43 /**
  44  * Vertex and index buffers need hardware backing.  Constant buffers
  45  * do not.  No other types of buffers currently supported.
  46  */
  47 static INLINE boolean
  48 svga_buffer_needs_hw_storage(unsigned usage)
  49 {
  50    return usage & (PIPE_BIND_VERTEX_BUFFER | PIPE_BIND_INDEX_BUFFER);
  51 }
  52
  53
  54 static unsigned int
  55 svga_buffer_is_referenced( struct pipe_context *pipe,
  56                              struct pipe_resource *buf,
  57                              unsigned face, unsigned level)
  58 {
  59    struct svga_screen *ss = svga_screen(pipe->screen);
  60    struct svga_buffer *sbuf = svga_buffer(buf);
  61
  62    /**
  63     * XXX: Check this.
  64     * The screen may cache buffer writes, but when we map, we map out
  65     * of those cached writes, so we don't need to set a
  66     * PIPE_REFERENCED_FOR_WRITE flag for cached buffers.
  67     */
  68
  69    if (!sbuf->handle || ss->sws->surface_is_flushed(ss->sws, sbuf->handle))
  70      return PIPE_UNREFERENCED;
  71
  72    /**
  73     * sws->surface_is_flushed() does not distinguish between read references
  74     * and write references. So assume a reference is both,
  75     * however, we make an exception for index- and vertex buffers, to avoid
  76     * a flush in st_bufferobj_get_subdata, during display list replay.
  77     */
  78
  79    if (sbuf->b.b.bind & (PIPE_BIND_VERTEX_BUFFER | PIPE_BIND_INDEX_BUFFER))
  80       return PIPE_REFERENCED_FOR_READ;
  81
  82    return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
  83 }
  84
  85
  86
  87
  88
  89
  90 static void *
  91 svga_buffer_map_range( struct pipe_screen *screen,
  92                        struct pipe_resource *buf,
  93                        unsigned offset,
  94                        unsigned length,
  95                        unsigned usage )
  96 {
  97    struct svga_screen *ss = svga_screen(screen);
  98    struct svga_winsys_screen *sws = ss->sws;
  99    struct svga_buffer *sbuf = svga_buffer( buf );
 100    void *map;
 101
 102    if (!sbuf->swbuf && !sbuf->hwbuf) {
 103       if (svga_buffer_create_hw_storage(ss, sbuf) != PIPE_OK) {
 104          /*
 105           * We can't create a hardware buffer big enough, so create a malloc
 106           * buffer instead.
 107           */
 108          debug_printf("%s: failed to allocate %u KB of DMA, splitting DMA transfers\n",
 109                       __FUNCTION__,
 110                       (sbuf->b.b.width0 + 1023)/1024);
 111
 112          sbuf->swbuf = align_malloc(sbuf->b.b.width0, 16);
 113       }
 114    }
 115
 116    if (sbuf->swbuf) {
 117       /* User/malloc buffer */
 118       map = sbuf->swbuf;
 119    }
 120    else if (sbuf->hwbuf) {
 121       map = sws->buffer_map(sws, sbuf->hwbuf, usage);
 122    }
 123    else {
 124       map = NULL;
 125    }
 126
 127    if(map) {
 128       ++sbuf->map.count;
 129
 130       if (usage & PIPE_TRANSFER_WRITE) {
 131          assert(sbuf->map.count <= 1);
 132          sbuf->map.writing = TRUE;
 133          if (usage & PIPE_TRANSFER_FLUSH_EXPLICIT)
 134             sbuf->map.flush_explicit = TRUE;
 135       }
 136    }
 137
 138    return map;
 139 }
 140
 141
 142
 143 static void
 144 svga_buffer_flush_mapped_range( struct pipe_screen *screen,
 145                                 struct pipe_resource *buf,
 146                                 unsigned offset, unsigned length)
 147 {
 148    struct svga_buffer *sbuf = svga_buffer( buf );
 149    struct svga_screen *ss = svga_screen(screen);
 150
 151    pipe_mutex_lock(ss->swc_mutex);
 152    assert(sbuf->map.writing);
 153    if(sbuf->map.writing) {
 154       assert(sbuf->map.flush_explicit);
 155       svga_buffer_add_range(sbuf, offset, offset + length);
 156    }
 157    pipe_mutex_unlock(ss->swc_mutex);
 158 }
 159
 160 static void
 161 svga_buffer_unmap( struct pipe_screen *screen,
 162                    struct pipe_resource *buf)
 163 {
 164    struct svga_screen *ss = svga_screen(screen);
 165    struct svga_winsys_screen *sws = ss->sws;
 166    struct svga_buffer *sbuf = svga_buffer( buf );
 167
 168    pipe_mutex_lock(ss->swc_mutex);
 169
 170    assert(sbuf->map.count);
 171    if(sbuf->map.count)
 172       --sbuf->map.count;
 173
 174    if(sbuf->hwbuf)
 175       sws->buffer_unmap(sws, sbuf->hwbuf);
 176
 177    if(sbuf->map.writing) {
 178       if(!sbuf->map.flush_explicit) {
 179          /* No mapped range was flushed -- flush the whole buffer */
 180          SVGA_DBG(DEBUG_DMA, "flushing the whole buffer\n");
 181
 182          svga_buffer_add_range(sbuf, 0, sbuf->b.b.width0);
 183       }
 184
 185       sbuf->map.writing = FALSE;
 186       sbuf->map.flush_explicit = FALSE;
 187    }
 188
 189    pipe_mutex_unlock(ss->swc_mutex);
 190 }
 191
 192
 193
 194 static void
 195 svga_buffer_destroy( struct pipe_screen *screen,
 196                      struct pipe_resource *buf )
 197 {
 198    struct svga_screen *ss = svga_screen(screen);
 199    struct svga_buffer *sbuf = svga_buffer( buf );
 200
 201    assert(!p_atomic_read(&buf->reference.count));
 202
 203    assert(!sbuf->dma.pending);
 204
 205    if(sbuf->handle)
 206       svga_buffer_destroy_host_surface(ss, sbuf);
 207
 208    if(sbuf->uploaded.buffer)
 209       pipe_resource_reference(&sbuf->uploaded.buffer, NULL);
 210
 211    if(sbuf->hwbuf)
 212       svga_buffer_destroy_hw_storage(ss, sbuf);
 213
 214    if(sbuf->swbuf && !sbuf->user)
 215       align_free(sbuf->swbuf);
 216
 217    FREE(sbuf);
 218 }
 219
 220
 221 /* Keep the original code more or less intact, implement transfers in
 222  * terms of the old functions.
 223  */
 224 static void *
 225 svga_buffer_transfer_map( struct pipe_context *pipe,
 226                           struct pipe_transfer *transfer )
 227 {
 228    uint8_t *map = svga_buffer_map_range( pipe->screen,
 229                                          transfer->resource,
 230                                          transfer->box.x,
 231                                          transfer->box.width,
 232                                          transfer->usage );
 233    if (map == NULL)
 234       return NULL;
 235
 236    /* map_buffer() returned a pointer to the beginning of the buffer,
 237     * but transfers are expected to return a pointer to just the
 238     * region specified in the box.
 239     */
 240    return map + transfer->box.x;
 241 }
 242
 243
 244
 245 static void svga_buffer_transfer_flush_region( struct pipe_context *pipe,
 246                                                struct pipe_transfer *transfer,
 247                                                const struct pipe_box *box)
 248 {
 249    assert(box->x + box->width <= transfer->box.width);
 250
 251    svga_buffer_flush_mapped_range(pipe->screen,
 252                                   transfer->resource,
 253                                   transfer->box.x + box->x,
 254                                   box->width);
 255 }
 256
 257 static void svga_buffer_transfer_unmap( struct pipe_context *pipe,
 258                             struct pipe_transfer *transfer )
 259 {
 260    svga_buffer_unmap(pipe->screen,
 261                      transfer->resource);
 262 }
 263
 264
 265
 266
 267
 268
 269
 270 struct u_resource_vtbl svga_buffer_vtbl =
 271 {
 272    u_default_resource_get_handle,      /* get_handle */
 273    svga_buffer_destroy,              /* resource_destroy */
 274    svga_buffer_is_referenced,        /* is_resource_referenced */
 275    u_default_get_transfer,           /* get_transfer */
 276    u_default_transfer_destroy,       /* transfer_destroy */
 277    svga_buffer_transfer_map,         /* transfer_map */
 278    svga_buffer_transfer_flush_region,  /* transfer_flush_region */
 279    svga_buffer_transfer_unmap,       /* transfer_unmap */
 280    u_default_transfer_inline_write   /* transfer_inline_write */
 281 };
 282
 283
 284
 285 struct pipe_resource *
 286 svga_buffer_create(struct pipe_screen *screen,
 287                    const struct pipe_resource *template)
 288 {
 289    struct svga_screen *ss = svga_screen(screen);
 290    struct svga_buffer *sbuf;
 291
 292    sbuf = CALLOC_STRUCT(svga_buffer);
 293    if(!sbuf)
 294       goto error1;
 295
 296    sbuf->b.b = *template;
 297    sbuf->b.vtbl = &svga_buffer_vtbl;
 298    pipe_reference_init(&sbuf->b.b.reference, 1);
 299    sbuf->b.b.screen = screen;
 300
 301    if(svga_buffer_needs_hw_storage(template->bind)) {
 302       if(svga_buffer_create_host_surface(ss, sbuf) != PIPE_OK)
 303          goto error2;
 304    }
 305    else {
 306       sbuf->swbuf = align_malloc(template->width0, 64);
 307       if(!sbuf->swbuf)
 308          goto error2;
 309    }
 310
 311    return &sbuf->b.b;
 312
 313 error2:
 314    FREE(sbuf);
 315 error1:
 316    return NULL;
 317 }
 318
 319 struct pipe_resource *
 320 svga_user_buffer_create(struct pipe_screen *screen,
 321                         void *ptr,
 322                         unsigned bytes,
 323                         unsigned bind)
 324 {
 325    struct svga_buffer *sbuf;
 326
 327    sbuf = CALLOC_STRUCT(svga_buffer);
 328    if(!sbuf)
 329       goto no_sbuf;
 330
 331    pipe_reference_init(&sbuf->b.b.reference, 1);
 332    sbuf->b.vtbl = &svga_buffer_vtbl;
 333    sbuf->b.b.screen = screen;
 334    sbuf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
 335    sbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 336    sbuf->b.b.bind = bind;
 337    sbuf->b.b.width0 = bytes;
 338    sbuf->b.b.height0 = 1;
 339    sbuf->b.b.depth0 = 1;
 340
 341    sbuf->swbuf = ptr;
 342    sbuf->user = TRUE;
 343
 344    return &sbuf->b.b;
 345
 346 no_sbuf:
 347    return NULL;
 348 }
 349
 350
 351