linux-core/drm_memory_debug.c

   1 /**
   2  * \file drm_memory_debug.c
   3  * Memory management wrappers for DRM.
   4  *
   5  * \author Rickard E. (Rik) Faith <faith@valinux.com>
   6  * \author Gareth Hughes <gareth@valinux.com>
   7  */
   8
   9 /*
  10  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  11  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  12  * All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice (including the next
  22  * paragraph) shall be included in all copies or substantial portions of the
  23  * Software.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  26  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  27  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  28  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  29  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  30  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  31  * OTHER DEALINGS IN THE SOFTWARE.
  32  */
  33
  34 #include <linux/config.h>
  35 #include "drmP.h"
  36
  37 #ifdef DEBUG_MEMORY
  38
  39 typedef struct drm_mem_stats {
  40         const char *name;
  41         int succeed_count;
  42         int free_count;
  43         int fail_count;
  44         unsigned long bytes_allocated;
  45         unsigned long bytes_freed;
  46 } drm_mem_stats_t;
  47
  48 static spinlock_t drm_mem_lock = SPIN_LOCK_UNLOCKED;
  49 static unsigned long drm_ram_available = 0;     /* In pages */
  50 static unsigned long drm_ram_used = 0;
  51 static drm_mem_stats_t drm_mem_stats[] = {
  52         [DRM_MEM_DMA] = {"dmabufs"},
  53         [DRM_MEM_SAREA] = {"sareas"},
  54         [DRM_MEM_DRIVER] = {"driver"},
  55         [DRM_MEM_MAGIC] = {"magic"},
  56         [DRM_MEM_IOCTLS] = {"ioctltab"},
  57         [DRM_MEM_MAPS] = {"maplist"},
  58         [DRM_MEM_VMAS] = {"vmalist"},
  59         [DRM_MEM_BUFS] = {"buflist"},
  60         [DRM_MEM_SEGS] = {"seglist"},
  61         [DRM_MEM_PAGES] = {"pagelist"},
  62         [DRM_MEM_FILES] = {"files"},
  63         [DRM_MEM_QUEUES] = {"queues"},
  64         [DRM_MEM_CMDS] = {"commands"},
  65         [DRM_MEM_MAPPINGS] = {"mappings"},
  66         [DRM_MEM_BUFLISTS] = {"buflists"},
  67         [DRM_MEM_AGPLISTS] = {"agplist"},
  68         [DRM_MEM_SGLISTS] = {"sglist"},
  69         [DRM_MEM_TOTALAGP] = {"totalagp"},
  70         [DRM_MEM_BOUNDAGP] = {"boundagp"},
  71         [DRM_MEM_CTXBITMAP] = {"ctxbitmap"},
  72         [DRM_MEM_CTXLIST] = {"ctxlist"},
  73         [DRM_MEM_STUB] = {"stub"},
  74         {NULL, 0,}              /* Last entry must be null */
  75 };
  76
  77 void drm_mem_init(void)
  78 {
  79         drm_mem_stats_t *mem;
  80         struct sysinfo si;
  81
  82         for (mem = drm_mem_stats; mem->name; ++mem) {
  83                 mem->succeed_count = 0;
  84                 mem->free_count = 0;
  85                 mem->fail_count = 0;
  86                 mem->bytes_allocated = 0;
  87                 mem->bytes_freed = 0;
  88         }
  89
  90         si_meminfo(&si);
  91         drm_ram_available = si.totalram;
  92         drm_ram_used = 0;
  93 }
  94
  95 /* drm_mem_info is called whenever a process reads /dev/drm/mem. */
  96
  97 static int drm__mem_info(char *buf, char **start, off_t offset,
  98                          int request, int *eof, void *data)
  99 {
 100         drm_mem_stats_t *pt;
 101         int len = 0;
 102
 103         if (offset > DRM_PROC_LIMIT) {
 104                 *eof = 1;
 105                 return 0;
 106         }
 107
 108         *eof = 0;
 109         *start = &buf[offset];
 110
 111         DRM_PROC_PRINT("                  total counts                  "
 112                        " |    outstanding  \n");
 113         DRM_PROC_PRINT("type       alloc freed fail     bytes      freed"
 114                        " | allocs      bytes\n\n");
 115         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 116                        "system", 0, 0, 0,
 117                        drm_ram_available << (PAGE_SHIFT - 10));
 118         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 119                        "locked", 0, 0, 0, drm_ram_used >> 10);
 120         DRM_PROC_PRINT("\n");
 121         for (pt = drm_mem_stats; pt->name; pt++) {
 122                 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
 123                                pt->name,
 124                                pt->succeed_count,
 125                                pt->free_count,
 126                                pt->fail_count,
 127                                pt->bytes_allocated,
 128                                pt->bytes_freed,
 129                                pt->succeed_count - pt->free_count,
 130                                (long)pt->bytes_allocated
 131                                - (long)pt->bytes_freed);
 132         }
 133
 134         if (len > request + offset)
 135                 return request;
 136         *eof = 1;
 137         return len - offset;
 138 }
 139
 140 int drm_mem_info(char *buf, char **start, off_t offset,
 141                  int len, int *eof, void *data)
 142 {
 143         int ret;
 144
 145         spin_lock(&drm_mem_lock);
 146         ret = drm__mem_info(buf, start, offset, len, eof, data);
 147         spin_unlock(&drm_mem_lock);
 148         return ret;
 149 }
 150
 151 void *drm_alloc(size_t size, int area)
 152 {
 153         void *pt;
 154
 155         if (!size) {
 156                 DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
 157                 return NULL;
 158         }
 159
 160         if (!(pt = kmalloc(size, GFP_KERNEL))) {
 161                 spin_lock(&drm_mem_lock);
 162                 ++drm_mem_stats[area].fail_count;
 163                 spin_unlock(&drm_mem_lock);
 164                 return NULL;
 165         }
 166         spin_lock(&drm_mem_lock);
 167         ++drm_mem_stats[area].succeed_count;
 168         drm_mem_stats[area].bytes_allocated += size;
 169         spin_unlock(&drm_mem_lock);
 170         return pt;
 171 }
 172 EXPORT_SYMBOL(drm_alloc);
 173
 174 void *drm_calloc(size_t nmemb, size_t size, int area)
 175 {
 176         void *addr;
 177
 178         addr = drm_alloc(nmemb * size, area);
 179         if (addr != NULL)
 180                 memset((void *)addr, 0, size * nmemb);
 181
 182         return addr;
 183 }
 184 EXPORT_SYMBOL(drm_calloc);
 185
 186 void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
 187 {
 188         void *pt;
 189
 190         if (!(pt = drm_alloc(size, area)))
 191                 return NULL;
 192         if (oldpt && oldsize) {
 193                 memcpy(pt, oldpt, oldsize);
 194                 drm_free(oldpt, oldsize, area);
 195         }
 196         return pt;
 197 }
 198 EXPORT_SYMBOL(drm_realloc);
 199
 200 void drm_free(void *pt, size_t size, int area)
 201 {
 202         int alloc_count;
 203         int free_count;
 204
 205         if (!pt)
 206                 DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
 207         else
 208                 kfree(pt);
 209         spin_lock(&drm_mem_lock);
 210         drm_mem_stats[area].bytes_freed += size;
 211         free_count = ++drm_mem_stats[area].free_count;
 212         alloc_count = drm_mem_stats[area].succeed_count;
 213         spin_unlock(&drm_mem_lock);
 214         if (free_count > alloc_count) {
 215                 DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
 216                               free_count, alloc_count);
 217         }
 218 }
 219 EXPORT_SYMBOL(drm_free);
 220
 221 unsigned long drm_alloc_pages(int order, int area)
 222 {
 223         unsigned long address;
 224         unsigned long bytes = PAGE_SIZE << order;
 225         unsigned long addr;
 226         unsigned int sz;
 227
 228         spin_lock(&drm_mem_lock);
 229         if ((drm_ram_used >> PAGE_SHIFT)
 230             > (DRM_RAM_PERCENT * drm_ram_available) / 100) {
 231                 spin_unlock(&drm_mem_lock);
 232                 return 0;
 233         }
 234         spin_unlock(&drm_mem_lock);
 235
 236         address = __get_free_pages(GFP_KERNEL, order);
 237         if (!address) {
 238                 spin_lock(&drm_mem_lock);
 239                 ++drm_mem_stats[area].fail_count;
 240                 spin_unlock(&drm_mem_lock);
 241                 return 0;
 242         }
 243         spin_lock(&drm_mem_lock);
 244         ++drm_mem_stats[area].succeed_count;
 245         drm_mem_stats[area].bytes_allocated += bytes;
 246         drm_ram_used += bytes;
 247         spin_unlock(&drm_mem_lock);
 248
 249         /* Zero outside the lock */
 250         memset((void *)address, 0, bytes);
 251
 252         /* Reserve */
 253         for (addr = address, sz = bytes;
 254              sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 255                 SetPageReserved(virt_to_page(addr));
 256         }
 257
 258         return address;
 259 }
 260
 261 void drm_free_pages(unsigned long address, int order, int area)
 262 {
 263         unsigned long bytes = PAGE_SIZE << order;
 264         int alloc_count;
 265         int free_count;
 266         unsigned long addr;
 267         unsigned int sz;
 268
 269         if (!address) {
 270                 DRM_MEM_ERROR(area, "Attempt to free address 0\n");
 271         } else {
 272                 /* Unreserve */
 273                 for (addr = address, sz = bytes;
 274                      sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 275                         ClearPageReserved(virt_to_page(addr));
 276                 }
 277                 free_pages(address, order);
 278         }
 279
 280         spin_lock(&drm_mem_lock);
 281         free_count = ++drm_mem_stats[area].free_count;
 282         alloc_count = drm_mem_stats[area].succeed_count;
 283         drm_mem_stats[area].bytes_freed += bytes;
 284         drm_ram_used -= bytes;
 285         spin_unlock(&drm_mem_lock);
 286         if (free_count > alloc_count) {
 287                 DRM_MEM_ERROR(area,
 288                               "Excess frees: %d frees, %d allocs\n",
 289                               free_count, alloc_count);
 290         }
 291 }
 292
 293 void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t * dev)
 294 {
 295         void *pt;
 296
 297         if (!size) {
 298                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 299                               "Mapping 0 bytes at 0x%08lx\n", offset);
 300                 return NULL;
 301         }
 302
 303         if (!(pt = drm_ioremap(offset, size, dev))) {
 304                 spin_lock(&drm_mem_lock);
 305                 ++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
 306                 spin_unlock(&drm_mem_lock);
 307                 return NULL;
 308         }
 309         spin_lock(&drm_mem_lock);
 310         ++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
 311         drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
 312         spin_unlock(&drm_mem_lock);
 313         return pt;
 314 }
 315 EXPORT_SYMBOL(drm_ioremap);
 316
 317 void *drm_ioremap_nocache(unsigned long offset, unsigned long size,
 318                           drm_device_t * dev)
 319 {
 320         void *pt;
 321
 322         if (!size) {
 323                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 324                               "Mapping 0 bytes at 0x%08lx\n", offset);
 325                 return NULL;
 326         }
 327
 328         if (!(pt = drm_ioremap_nocache(offset, size, dev))) {
 329                 spin_lock(&drm_mem_lock);
 330                 ++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
 331                 spin_unlock(&drm_mem_lock);
 332                 return NULL;
 333         }
 334         spin_lock(&drm_mem_lock);
 335         ++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
 336         drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
 337         spin_unlock(&drm_mem_lock);
 338         return pt;
 339 }
 340 EXPORT_SYMBOL(drm_ioremap_nocache);
 341
 342 void drm_ioremapfree(void *pt, unsigned long size, drm_device_t * dev)
 343 {
 344         int alloc_count;
 345         int free_count;
 346
 347         if (!pt)
 348                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 349                               "Attempt to free NULL pointer\n");
 350         else
 351                 drm_ioremapfree(pt, size, dev);
 352
 353         spin_lock(&drm_mem_lock);
 354         drm_mem_stats[DRM_MEM_MAPPINGS].bytes_freed += size;
 355         free_count = ++drm_mem_stats[DRM_MEM_MAPPINGS].free_count;
 356         alloc_count = drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
 357         spin_unlock(&drm_mem_lock);
 358         if (free_count > alloc_count) {
 359                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 360                               "Excess frees: %d frees, %d allocs\n",
 361                               free_count, alloc_count);
 362         }
 363 }
 364 EXPORT_SYMBOL(drm_ioremapfree);
 365
 366 #if __OS_HAS_AGP
 367
 368 DRM_AGP_MEM *drm_alloc_agp(int pages, u32 type)
 369 {
 370         DRM_AGP_MEM *handle;
 371
 372         if (!pages) {
 373                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
 374                 return NULL;
 375         }
 376
 377         if ((handle = drm_agp_allocate_memory(pages, type))) {
 378                 spin_lock(&drm_mem_lock);
 379                 ++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 380                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
 381                     += pages << PAGE_SHIFT;
 382                 spin_unlock(&drm_mem_lock);
 383                 return handle;
 384         }
 385         spin_lock(&drm_mem_lock);
 386         ++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
 387         spin_unlock(&drm_mem_lock);
 388         return NULL;
 389 }
 390
 391 int drm_free_agp(DRM_AGP_MEM * handle, int pages)
 392 {
 393         int alloc_count;
 394         int free_count;
 395         int retval = -EINVAL;
 396
 397         if (!handle) {
 398                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 399                               "Attempt to free NULL AGP handle\n");
 400                 return retval;
 401         }
 402
 403         if (drm_agp_free_memory(handle)) {
 404                 spin_lock(&drm_mem_lock);
 405                 free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
 406                 alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 407                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
 408                     += pages << PAGE_SHIFT;
 409                 spin_unlock(&drm_mem_lock);
 410                 if (free_count > alloc_count) {
 411                         DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 412                                       "Excess frees: %d frees, %d allocs\n",
 413                                       free_count, alloc_count);
 414                 }
 415                 return 0;
 416         }
 417         return retval;
 418 }
 419
 420 int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
 421 {
 422         int retcode = -EINVAL;
 423
 424         if (!handle) {
 425                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 426                               "Attempt to bind NULL AGP handle\n");
 427                 return retcode;
 428         }
 429
 430         if (!(retcode = drm_agp_bind_memory(handle, start))) {
 431                 spin_lock(&drm_mem_lock);
 432                 ++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 433                 drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
 434                     += handle->page_count << PAGE_SHIFT;
 435                 spin_unlock(&drm_mem_lock);
 436                 return retcode;
 437         }
 438         spin_lock(&drm_mem_lock);
 439         ++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
 440         spin_unlock(&drm_mem_lock);
 441         return retcode;
 442 }
 443
 444 int drm_unbind_agp(DRM_AGP_MEM * handle)
 445 {
 446         int alloc_count;
 447         int free_count;
 448         int retcode = -EINVAL;
 449
 450         if (!handle) {
 451                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 452                               "Attempt to unbind NULL AGP handle\n");
 453                 return retcode;
 454         }
 455
 456         if ((retcode = drm_agp_unbind_memory(handle)))
 457                 return retcode;
 458         spin_lock(&drm_mem_lock);
 459         free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
 460         alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 461         drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
 462             += handle->page_count << PAGE_SHIFT;
 463         spin_unlock(&drm_mem_lock);
 464         if (free_count > alloc_count) {
 465                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 466                               "Excess frees: %d frees, %d allocs\n",
 467                               free_count, alloc_count);
 468         }
 469         return retcode;
 470 }
 471
 472 #endif
 473 #endif