src/mesa/drivers/dri/intel/intel_regions.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Provide additional functionality on top of bufmgr buffers:
  29  *   - 2d semantics and blit operations
  30  *   - refcounting of buffers for multiple images in a buffer.
  31  *   - refcounting of buffer mappings.
  32  *   - some logic for moving the buffers to the best memory pools for
  33  *     given operations.
  34  *
  35  * Most of this is to make it easier to implement the fixed-layout
  36  * mipmap tree required by intel hardware in the face of GL's
  37  * programming interface where each image can be specifed in random
  38  * order and it isn't clear what layout the tree should have until the
  39  * last moment.
  40  */
  41
  42 #include <sys/ioctl.h>
  43 #include <errno.h>
  44
  45 #include "main/hash.h"
  46 #include "intel_context.h"
  47 #include "intel_regions.h"
  48 #include "intel_blit.h"
  49 #include "intel_buffer_objects.h"
  50 #include "intel_bufmgr.h"
  51 #include "intel_batchbuffer.h"
  52
  53 #define FILE_DEBUG_FLAG DEBUG_REGION
  54
  55 /* This should be set to the maximum backtrace size desired.
  56  * Set it to 0 to disable backtrace debugging.
  57  */
  58 #define DEBUG_BACKTRACE_SIZE 0
  59
  60 #if DEBUG_BACKTRACE_SIZE == 0
  61 /* Use the standard debug output */
  62 #define _DBG(...) DBG(__VA_ARGS__)
  63 #else
  64 /* Use backtracing debug output */
  65 #define _DBG(...) {debug_backtrace(); DBG(__VA_ARGS__);}
  66
  67 /* Backtracing debug support */
  68 #include <execinfo.h>
  69
  70 static void
  71 debug_backtrace(void)
  72 {
  73    void *trace[DEBUG_BACKTRACE_SIZE];
  74    char **strings = NULL;
  75    int traceSize;
  76    register int i;
  77
  78    traceSize = backtrace(trace, DEBUG_BACKTRACE_SIZE);
  79    strings = backtrace_symbols(trace, traceSize);
  80    if (strings == NULL) {
  81       DBG("no backtrace:");
  82       return;
  83    }
  84
  85    /* Spit out all the strings with a colon separator.  Ignore
  86     * the first, since we don't really care about the call
  87     * to debug_backtrace() itself.  Skip until the final "/" in
  88     * the trace to avoid really long lines.
  89     */
  90    for (i = 1; i < traceSize; i++) {
  91       char *p = strings[i], *slash = strings[i];
  92       while (*p) {
  93          if (*p++ == '/') {
  94             slash = p;
  95          }
  96       }
  97
  98       DBG("%s:", slash);
  99    }
 100
 101    /* Free up the memory, and we're done */
 102    free(strings);
 103 }
 104
 105 #endif
 106
 107
 108
 109 /* XXX: Thread safety?
 110  */
 111 GLubyte *
 112 intel_region_map(struct intel_context *intel, struct intel_region *region)
 113 {
 114    intel_flush(&intel->ctx);
 115
 116    _DBG("%s %p\n", __FUNCTION__, region);
 117    if (!region->map_refcount++) {
 118       if (region->tiling != I915_TILING_NONE)
 119          drm_intel_gem_bo_map_gtt(region->buffer);
 120       else
 121          drm_intel_bo_map(region->buffer, GL_TRUE);
 122       region->map = region->buffer->virtual;
 123    }
 124
 125    return region->map;
 126 }
 127
 128 void
 129 intel_region_unmap(struct intel_context *intel, struct intel_region *region)
 130 {
 131    _DBG("%s %p\n", __FUNCTION__, region);
 132    if (!--region->map_refcount) {
 133       if (region->tiling != I915_TILING_NONE)
 134          drm_intel_gem_bo_unmap_gtt(region->buffer);
 135       else
 136          drm_intel_bo_unmap(region->buffer);
 137       region->map = NULL;
 138    }
 139 }
 140
 141 static struct intel_region *
 142 intel_region_alloc_internal(struct intel_screen *screen,
 143                             GLuint cpp,
 144                             GLuint width, GLuint height, GLuint pitch,
 145                             uint32_t tiling, drm_intel_bo *buffer)
 146 {
 147    struct intel_region *region;
 148
 149    region = calloc(sizeof(*region), 1);
 150    if (region == NULL)
 151       return region;
 152
 153    region->cpp = cpp;
 154    region->width = width;
 155    region->height = height;
 156    region->pitch = pitch;
 157    region->refcount = 1;
 158    region->buffer = buffer;
 159    region->tiling = tiling;
 160    region->screen = screen;
 161
 162    _DBG("%s <-- %p\n", __FUNCTION__, region);
 163    return region;
 164 }
 165
 166 struct intel_region *
 167 intel_region_alloc(struct intel_screen *screen,
 168                    uint32_t tiling,
 169                    GLuint cpp, GLuint width, GLuint height,
 170                    GLboolean expect_accelerated_upload)
 171 {
 172    drm_intel_bo *buffer;
 173    unsigned long flags = 0;
 174    unsigned long aligned_pitch;
 175    struct intel_region *region;
 176
 177    if (expect_accelerated_upload)
 178       flags |= BO_ALLOC_FOR_RENDER;
 179
 180    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "region",
 181                                      width, height, cpp,
 182                                      &tiling, &aligned_pitch, flags);
 183    if (buffer == NULL)
 184       return NULL;
 185
 186    region = intel_region_alloc_internal(screen, cpp, width, height,
 187                                         aligned_pitch / cpp, tiling, buffer);
 188    if (region == NULL) {
 189       drm_intel_bo_unreference(buffer);
 190       return NULL;
 191    }
 192
 193    return region;
 194 }
 195
 196 GLboolean
 197 intel_region_flink(struct intel_region *region, uint32_t *name)
 198 {
 199    if (region->name == 0) {
 200       if (drm_intel_bo_flink(region->buffer, &region->name))
 201          return GL_FALSE;
 202
 203       _mesa_HashInsert(region->screen->named_regions,
 204                        region->name, region);
 205    }
 206
 207    *name = region->name;
 208
 209    return GL_TRUE;
 210 }
 211
 212 struct intel_region *
 213 intel_region_alloc_for_handle(struct intel_screen *screen,
 214                               GLuint cpp,
 215                               GLuint width, GLuint height, GLuint pitch,
 216                               GLuint handle, const char *name)
 217 {
 218    struct intel_region *region, *dummy;
 219    drm_intel_bo *buffer;
 220    int ret;
 221    uint32_t bit_6_swizzle, tiling;
 222
 223    region = _mesa_HashLookup(screen->named_regions, handle);
 224    if (region != NULL) {
 225       dummy = NULL;
 226       if (region->width != width || region->height != height ||
 227           region->cpp != cpp || region->pitch != pitch) {
 228          fprintf(stderr,
 229                  "Region for name %d already exists but is not compatible\n",
 230                  handle);
 231          return NULL;
 232       }
 233       intel_region_reference(&dummy, region);
 234       return dummy;
 235    }
 236
 237    buffer = intel_bo_gem_create_from_name(screen->bufmgr, name, handle);
 238    if (buffer == NULL)
 239       return NULL;
 240    ret = drm_intel_bo_get_tiling(buffer, &tiling, &bit_6_swizzle);
 241    if (ret != 0) {
 242       fprintf(stderr, "Couldn't get tiling of buffer %d (%s): %s\n",
 243               handle, name, strerror(-ret));
 244       drm_intel_bo_unreference(buffer);
 245       return NULL;
 246    }
 247
 248    region = intel_region_alloc_internal(screen, cpp,
 249                                         width, height, pitch, tiling, buffer);
 250    if (region == NULL) {
 251       drm_intel_bo_unreference(buffer);
 252       return NULL;
 253    }
 254
 255    region->name = handle;
 256    _mesa_HashInsert(screen->named_regions, handle, region);
 257
 258    return region;
 259 }
 260
 261 void
 262 intel_region_reference(struct intel_region **dst, struct intel_region *src)
 263 {
 264    _DBG("%s: %p(%d) -> %p(%d)\n", __FUNCTION__,
 265         *dst, *dst ? (*dst)->refcount : 0, src, src ? src->refcount : 0);
 266
 267    if (src != *dst) {
 268       if (*dst)
 269          intel_region_release(dst);
 270
 271       if (src)
 272          src->refcount++;
 273       *dst = src;
 274    }
 275 }
 276
 277 void
 278 intel_region_release(struct intel_region **region_handle)
 279 {
 280    struct intel_region *region = *region_handle;
 281
 282    if (region == NULL) {
 283       _DBG("%s NULL\n", __FUNCTION__);
 284       return;
 285    }
 286
 287    _DBG("%s %p %d\n", __FUNCTION__, region, region->refcount - 1);
 288
 289    ASSERT(region->refcount > 0);
 290    region->refcount--;
 291
 292    if (region->refcount == 0) {
 293       assert(region->map_refcount == 0);
 294
 295       drm_intel_bo_unreference(region->buffer);
 296
 297       if (region->name > 0)
 298          _mesa_HashRemove(region->screen->named_regions, region->name);
 299
 300       free(region);
 301    }
 302    *region_handle = NULL;
 303 }
 304
 305 /*
 306  * XXX Move this into core Mesa?
 307  */
 308 void
 309 _mesa_copy_rect(GLubyte * dst,
 310                 GLuint cpp,
 311                 GLuint dst_pitch,
 312                 GLuint dst_x,
 313                 GLuint dst_y,
 314                 GLuint width,
 315                 GLuint height,
 316                 const GLubyte * src,
 317                 GLuint src_pitch, GLuint src_x, GLuint src_y)
 318 {
 319    GLuint i;
 320
 321    dst_pitch *= cpp;
 322    src_pitch *= cpp;
 323    dst += dst_x * cpp;
 324    src += src_x * cpp;
 325    dst += dst_y * dst_pitch;
 326    src += src_y * src_pitch;
 327    width *= cpp;
 328
 329    if (width == dst_pitch && width == src_pitch)
 330       memcpy(dst, src, height * width);
 331    else {
 332       for (i = 0; i < height; i++) {
 333          memcpy(dst, src, width);
 334          dst += dst_pitch;
 335          src += src_pitch;
 336       }
 337    }
 338 }
 339
 340
 341 /* Upload data to a rectangular sub-region.  Lots of choices how to do this:
 342  *
 343  * - memcpy by span to current destination
 344  * - upload data as new buffer and blit
 345  *
 346  * Currently always memcpy.
 347  */
 348 void
 349 intel_region_data(struct intel_context *intel,
 350                   struct intel_region *dst,
 351                   GLuint dst_offset,
 352                   GLuint dstx, GLuint dsty,
 353                   const void *src, GLuint src_pitch,
 354                   GLuint srcx, GLuint srcy, GLuint width, GLuint height)
 355 {
 356    _DBG("%s\n", __FUNCTION__);
 357
 358    if (intel == NULL)
 359       return;
 360
 361    intel_prepare_render(intel);
 362
 363    _mesa_copy_rect(intel_region_map(intel, dst) + dst_offset,
 364                    dst->cpp,
 365                    dst->pitch,
 366                    dstx, dsty, width, height, src, src_pitch, srcx, srcy);
 367
 368    intel_region_unmap(intel, dst);
 369 }
 370
 371 /* Copy rectangular sub-regions. Need better logic about when to
 372  * push buffers into AGP - will currently do so whenever possible.
 373  */
 374 GLboolean
 375 intel_region_copy(struct intel_context *intel,
 376                   struct intel_region *dst,
 377                   GLuint dst_offset,
 378                   GLuint dstx, GLuint dsty,
 379                   struct intel_region *src,
 380                   GLuint src_offset,
 381                   GLuint srcx, GLuint srcy, GLuint width, GLuint height,
 382                   GLboolean flip,
 383                   GLenum logicop)
 384 {
 385    uint32_t src_pitch = src->pitch;
 386
 387    _DBG("%s\n", __FUNCTION__);
 388
 389    if (intel == NULL)
 390       return GL_FALSE;
 391
 392    assert(src->cpp == dst->cpp);
 393
 394    if (flip)
 395       src_pitch = -src_pitch;
 396
 397    return intelEmitCopyBlit(intel,
 398                             dst->cpp,
 399                             src_pitch, src->buffer, src_offset, src->tiling,
 400                             dst->pitch, dst->buffer, dst_offset, dst->tiling,
 401                             srcx, srcy, dstx, dsty, width, height,
 402                             logicop);
 403 }
 404
 405 drm_intel_bo *
 406 intel_region_buffer(struct intel_context *intel,
 407                     struct intel_region *region, GLuint flag)
 408 {
 409    return region->buffer;
 410 }