drivers/char/drm/drm_memory_debug.h

   1 /**
   2  * \file drm_memory_debug.h
   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 typedef struct drm_mem_stats {
  38         const char *name;
  39         int succeed_count;
  40         int free_count;
  41         int fail_count;
  42         unsigned long bytes_allocated;
  43         unsigned long bytes_freed;
  44 } drm_mem_stats_t;
  45
  46 static spinlock_t drm_mem_lock = SPIN_LOCK_UNLOCKED;
  47 static unsigned long drm_ram_available = 0;     /* In pages */
  48 static unsigned long drm_ram_used = 0;
  49 static drm_mem_stats_t drm_mem_stats[] =
  50 {
  51         [DRM_MEM_DMA] = {"dmabufs"},
  52         [DRM_MEM_SAREA] = {"sareas"},
  53         [DRM_MEM_DRIVER] = {"driver"},
  54         [DRM_MEM_MAGIC] = {"magic"},
  55         [DRM_MEM_IOCTLS] = {"ioctltab"},
  56         [DRM_MEM_MAPS] = {"maplist"},
  57         [DRM_MEM_VMAS] = {"vmalist"},
  58         [DRM_MEM_BUFS] = {"buflist"},
  59         [DRM_MEM_SEGS] = {"seglist"},
  60         [DRM_MEM_PAGES] = {"pagelist"},
  61         [DRM_MEM_FILES] = {"files"},
  62         [DRM_MEM_QUEUES] = {"queues"},
  63         [DRM_MEM_CMDS] = {"commands"},
  64         [DRM_MEM_MAPPINGS] = {"mappings"},
  65         [DRM_MEM_BUFLISTS] = {"buflists"},
  66         [DRM_MEM_AGPLISTS] = {"agplist"},
  67         [DRM_MEM_SGLISTS] = {"sglist"},
  68         [DRM_MEM_TOTALAGP] = {"totalagp"},
  69         [DRM_MEM_BOUNDAGP] = {"boundagp"},
  70         [DRM_MEM_CTXBITMAP] = {"ctxbitmap"},
  71         [DRM_MEM_CTXLIST] = {"ctxlist"},
  72         [DRM_MEM_STUB] = {"stub"},
  73         {NULL, 0,}              /* Last entry must be null */
  74 };
  75
  76 void drm_mem_init (void) {
  77         drm_mem_stats_t *mem;
  78         struct sysinfo si;
  79
  80         for (mem = drm_mem_stats; mem->name; ++mem) {
  81                 mem->succeed_count = 0;
  82                 mem->free_count = 0;
  83                 mem->fail_count = 0;
  84                 mem->bytes_allocated = 0;
  85                 mem->bytes_freed = 0;
  86         }
  87
  88         si_meminfo(&si);
  89         drm_ram_available = si.totalram;
  90         drm_ram_used = 0;
  91 }
  92
  93 /* drm_mem_info is called whenever a process reads /dev/drm/mem. */
  94
  95 static int drm__mem_info (char *buf, char **start, off_t offset,
  96                            int request, int *eof, void *data) {
  97         drm_mem_stats_t *pt;
  98         int len = 0;
  99
 100         if (offset > DRM_PROC_LIMIT) {
 101                 *eof = 1;
 102                 return 0;
 103         }
 104
 105         *eof = 0;
 106         *start = &buf[offset];
 107
 108         DRM_PROC_PRINT("                  total counts                  "
 109                        " |    outstanding  \n");
 110         DRM_PROC_PRINT("type       alloc freed fail     bytes      freed"
 111                        " | allocs      bytes\n\n");
 112         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 113                        "system", 0, 0, 0,
 114                        drm_ram_available << (PAGE_SHIFT - 10));
 115         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 116                        "locked", 0, 0, 0, drm_ram_used >> 10);
 117         DRM_PROC_PRINT("\n");
 118         for (pt = drm_mem_stats; pt->name; pt++) {
 119                 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
 120                                pt->name,
 121                                pt->succeed_count,
 122                                pt->free_count,
 123                                pt->fail_count,
 124                                pt->bytes_allocated,
 125                                pt->bytes_freed,
 126                                pt->succeed_count - pt->free_count,
 127                                (long)pt->bytes_allocated
 128                                - (long)pt->bytes_freed);
 129         }
 130
 131         if (len > request + offset)
 132                 return request;
 133         *eof = 1;
 134         return len - offset;
 135 }
 136
 137 int drm_mem_info (char *buf, char **start, off_t offset,
 138                    int len, int *eof, void *data) {
 139         int ret;
 140
 141         spin_lock(&drm_mem_lock);
 142         ret = drm__mem_info (buf, start, offset, len, eof, data);
 143         spin_unlock(&drm_mem_lock);
 144         return ret;
 145 }
 146
 147 void *drm_alloc (size_t size, int area) {
 148         void *pt;
 149
 150         if (!size) {
 151                 DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
 152                 return NULL;
 153         }
 154
 155         if (!(pt = kmalloc(size, GFP_KERNEL))) {
 156                 spin_lock(&drm_mem_lock);
 157                 ++drm_mem_stats[area].fail_count;
 158                 spin_unlock(&drm_mem_lock);
 159                 return NULL;
 160         }
 161         spin_lock(&drm_mem_lock);
 162         ++drm_mem_stats[area].succeed_count;
 163         drm_mem_stats[area].bytes_allocated += size;
 164         spin_unlock(&drm_mem_lock);
 165         return pt;
 166 }
 167
 168 void *drm_calloc (size_t nmemb, size_t size, int area) {
 169         void *addr;
 170
 171         addr = drm_alloc (nmemb * size, area);
 172         if (addr != NULL)
 173                 memset((void *)addr, 0, size * nmemb);
 174
 175         return addr;
 176 }
 177
 178 void *drm_realloc (void *oldpt, size_t oldsize, size_t size, int area) {
 179         void *pt;
 180
 181         if (!(pt = drm_alloc (size, area)))
 182                 return NULL;
 183         if (oldpt && oldsize) {
 184                 memcpy(pt, oldpt, oldsize);
 185                 drm_free (oldpt, oldsize, area);
 186         }
 187         return pt;
 188 }
 189
 190 void drm_free (void *pt, size_t size, int area) {
 191         int alloc_count;
 192         int free_count;
 193
 194         if (!pt)
 195                 DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
 196         else
 197                 kfree(pt);
 198         spin_lock(&drm_mem_lock);
 199         drm_mem_stats[area].bytes_freed += size;
 200         free_count = ++drm_mem_stats[area].free_count;
 201         alloc_count = drm_mem_stats[area].succeed_count;
 202         spin_unlock(&drm_mem_lock);
 203         if (free_count > alloc_count) {
 204                 DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
 205                               free_count, alloc_count);
 206         }
 207 }
 208
 209 unsigned long drm_alloc_pages (int order, int area) {
 210         unsigned long address;
 211         unsigned long bytes = PAGE_SIZE << order;
 212         unsigned long addr;
 213         unsigned int sz;
 214
 215         spin_lock(&drm_mem_lock);
 216         if ((drm_ram_used >> PAGE_SHIFT)
 217             > (DRM_RAM_PERCENT * drm_ram_available) / 100) {
 218                 spin_unlock(&drm_mem_lock);
 219                 return 0;
 220         }
 221         spin_unlock(&drm_mem_lock);
 222
 223         address = __get_free_pages(GFP_KERNEL|__GFP_COMP, order);
 224         if (!address) {
 225                 spin_lock(&drm_mem_lock);
 226                 ++drm_mem_stats[area].fail_count;
 227                 spin_unlock(&drm_mem_lock);
 228                 return 0;
 229         }
 230         spin_lock(&drm_mem_lock);
 231         ++drm_mem_stats[area].succeed_count;
 232         drm_mem_stats[area].bytes_allocated += bytes;
 233         drm_ram_used += bytes;
 234         spin_unlock(&drm_mem_lock);
 235
 236         /* Zero outside the lock */
 237         memset((void *)address, 0, bytes);
 238
 239         /* Reserve */
 240         for (addr = address, sz = bytes;
 241              sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 242                 SetPageReserved(virt_to_page(addr));
 243         }
 244
 245         return address;
 246 }
 247
 248 void drm_free_pages (unsigned long address, int order, int area) {
 249         unsigned long bytes = PAGE_SIZE << order;
 250         int alloc_count;
 251         int free_count;
 252         unsigned long addr;
 253         unsigned int sz;
 254
 255         if (!address) {
 256                 DRM_MEM_ERROR(area, "Attempt to free address 0\n");
 257         } else {
 258                 /* Unreserve */
 259                 for (addr = address, sz = bytes;
 260                      sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 261                         ClearPageReserved(virt_to_page(addr));
 262                 }
 263                 free_pages(address, order);
 264         }
 265
 266         spin_lock(&drm_mem_lock);
 267         free_count = ++drm_mem_stats[area].free_count;
 268         alloc_count = drm_mem_stats[area].succeed_count;
 269         drm_mem_stats[area].bytes_freed += bytes;
 270         drm_ram_used -= bytes;
 271         spin_unlock(&drm_mem_lock);
 272         if (free_count > alloc_count) {
 273                 DRM_MEM_ERROR(area,
 274                               "Excess frees: %d frees, %d allocs\n",
 275                               free_count, alloc_count);
 276         }
 277 }
 278
 279 void *drm_ioremap (unsigned long offset, unsigned long size,
 280                     drm_device_t * dev) {
 281         void *pt;
 282
 283         if (!size) {
 284                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 285                               "Mapping 0 bytes at 0x%08lx\n", offset);
 286                 return NULL;
 287         }
 288
 289         if (!(pt = drm_ioremap(offset, size, dev))) {
 290                 spin_lock(&drm_mem_lock);
 291                 ++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
 292                 spin_unlock(&drm_mem_lock);
 293                 return NULL;
 294         }
 295         spin_lock(&drm_mem_lock);
 296         ++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
 297         drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
 298         spin_unlock(&drm_mem_lock);
 299         return pt;
 300 }
 301
 302 void *drm_ioremap_nocache (unsigned long offset, unsigned long size,
 303                             drm_device_t * dev) {
 304         void *pt;
 305
 306         if (!size) {
 307                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 308                               "Mapping 0 bytes at 0x%08lx\n", offset);
 309                 return NULL;
 310         }
 311
 312         if (!(pt = drm_ioremap_nocache(offset, size, dev))) {
 313                 spin_lock(&drm_mem_lock);
 314                 ++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
 315                 spin_unlock(&drm_mem_lock);
 316                 return NULL;
 317         }
 318         spin_lock(&drm_mem_lock);
 319         ++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
 320         drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
 321         spin_unlock(&drm_mem_lock);
 322         return pt;
 323 }
 324
 325 void drm_ioremapfree (void *pt, unsigned long size, drm_device_t * dev) {
 326         int alloc_count;
 327         int free_count;
 328
 329         if (!pt)
 330                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 331                               "Attempt to free NULL pointer\n");
 332         else
 333                 drm_ioremapfree(pt, size, dev);
 334
 335         spin_lock(&drm_mem_lock);
 336         drm_mem_stats[DRM_MEM_MAPPINGS].bytes_freed += size;
 337         free_count = ++drm_mem_stats[DRM_MEM_MAPPINGS].free_count;
 338         alloc_count = drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
 339         spin_unlock(&drm_mem_lock);
 340         if (free_count > alloc_count) {
 341                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 342                               "Excess frees: %d frees, %d allocs\n",
 343                               free_count, alloc_count);
 344         }
 345 }
 346
 347 #if __OS_HAS_AGP
 348
 349 DRM_AGP_MEM *drm_alloc_agp (drm_device_t *dev, int pages, u32 type) {
 350         DRM_AGP_MEM *handle;
 351
 352         if (!pages) {
 353                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
 354                 return NULL;
 355         }
 356
 357         if ((handle = drm_agp_allocate_memory (pages, type))) {
 358                 spin_lock(&drm_mem_lock);
 359                 ++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 360                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
 361                     += pages << PAGE_SHIFT;
 362                 spin_unlock(&drm_mem_lock);
 363                 return handle;
 364         }
 365         spin_lock(&drm_mem_lock);
 366         ++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
 367         spin_unlock(&drm_mem_lock);
 368         return NULL;
 369 }
 370
 371 int drm_free_agp (DRM_AGP_MEM * handle, int pages) {
 372         int alloc_count;
 373         int free_count;
 374         int retval = -EINVAL;
 375
 376         if (!handle) {
 377                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 378                               "Attempt to free NULL AGP handle\n");
 379                 return retval;
 380         }
 381
 382         if (drm_agp_free_memory (handle)) {
 383                 spin_lock(&drm_mem_lock);
 384                 free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
 385                 alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 386                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
 387                     += pages << PAGE_SHIFT;
 388                 spin_unlock(&drm_mem_lock);
 389                 if (free_count > alloc_count) {
 390                         DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 391                                       "Excess frees: %d frees, %d allocs\n",
 392                                       free_count, alloc_count);
 393                 }
 394                 return 0;
 395         }
 396         return retval;
 397 }
 398
 399 int drm_bind_agp (DRM_AGP_MEM * handle, unsigned int start) {
 400         int retcode = -EINVAL;
 401
 402         if (!handle) {
 403                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 404                               "Attempt to bind NULL AGP handle\n");
 405                 return retcode;
 406         }
 407
 408         if (!(retcode = drm_agp_bind_memory (handle, start))) {
 409                 spin_lock(&drm_mem_lock);
 410                 ++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 411                 drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
 412                     += handle->page_count << PAGE_SHIFT;
 413                 spin_unlock(&drm_mem_lock);
 414                 return retcode;
 415         }
 416         spin_lock(&drm_mem_lock);
 417         ++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
 418         spin_unlock(&drm_mem_lock);
 419         return retcode;
 420 }
 421
 422 int drm_unbind_agp (DRM_AGP_MEM * handle) {
 423         int alloc_count;
 424         int free_count;
 425         int retcode = -EINVAL;
 426
 427         if (!handle) {
 428                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 429                               "Attempt to unbind NULL AGP handle\n");
 430                 return retcode;
 431         }
 432
 433         if ((retcode = drm_agp_unbind_memory (handle)))
 434                 return retcode;
 435         spin_lock(&drm_mem_lock);
 436         free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
 437         alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 438         drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
 439             += handle->page_count << PAGE_SHIFT;
 440         spin_unlock(&drm_mem_lock);
 441         if (free_count > alloc_count) {
 442                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 443                               "Excess frees: %d frees, %d allocs\n",
 444                               free_count, alloc_count);
 445         }
 446         return retcode;
 447 }
 448 #endif