drivers/char/drm/drm_memory_debug.h

   1 /**
   2  * \file drm_memory.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         [DRM_MEM_DMA]       = { "dmabufs"  },
  51         [DRM_MEM_SAREA]     = { "sareas"   },
  52         [DRM_MEM_DRIVER]    = { "driver"   },
  53         [DRM_MEM_MAGIC]     = { "magic"    },
  54         [DRM_MEM_IOCTLS]    = { "ioctltab" },
  55         [DRM_MEM_MAPS]      = { "maplist"  },
  56         [DRM_MEM_VMAS]      = { "vmalist"  },
  57         [DRM_MEM_BUFS]      = { "buflist"  },
  58         [DRM_MEM_SEGS]      = { "seglist"  },
  59         [DRM_MEM_PAGES]     = { "pagelist" },
  60         [DRM_MEM_FILES]     = { "files"    },
  61         [DRM_MEM_QUEUES]    = { "queues"   },
  62         [DRM_MEM_CMDS]      = { "commands" },
  63         [DRM_MEM_MAPPINGS]  = { "mappings" },
  64         [DRM_MEM_BUFLISTS]  = { "buflists" },
  65         [DRM_MEM_AGPLISTS]  = { "agplist"  },
  66         [DRM_MEM_SGLISTS]   = { "sglist"   },
  67         [DRM_MEM_TOTALAGP]  = { "totalagp" },
  68         [DRM_MEM_BOUNDAGP]  = { "boundagp" },
  69         [DRM_MEM_CTXBITMAP] = { "ctxbitmap"},
  70         [DRM_MEM_STUB]      = { "stub"     },
  71         { NULL, 0, }            /* Last entry must be null */
  72 };
  73
  74 void DRM(mem_init)(void)
  75 {
  76         drm_mem_stats_t *mem;
  77         struct sysinfo  si;
  78
  79         for (mem = DRM(mem_stats); mem->name; ++mem) {
  80                 mem->succeed_count   = 0;
  81                 mem->free_count      = 0;
  82                 mem->fail_count      = 0;
  83                 mem->bytes_allocated = 0;
  84                 mem->bytes_freed     = 0;
  85         }
  86
  87         si_meminfo(&si);
  88         DRM(ram_available) = si.totalram;
  89         DRM(ram_used)      = 0;
  90 }
  91
  92 /* drm_mem_info is called whenever a process reads /dev/drm/mem. */
  93
  94 static int DRM(_mem_info)(char *buf, char **start, off_t offset,
  95                           int request, int *eof, void *data)
  96 {
  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) return request;
 132         *eof = 1;
 133         return len - offset;
 134 }
 135
 136 int DRM(mem_info)(char *buf, char **start, off_t offset,
 137                   int len, int *eof, void *data)
 138 {
 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 {
 149         void *pt;
 150
 151         if (!size) {
 152                 DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
 153                 return NULL;
 154         }
 155
 156         if (!(pt = kmalloc(size, GFP_KERNEL))) {
 157                 spin_lock(&DRM(mem_lock));
 158                 ++DRM(mem_stats)[area].fail_count;
 159                 spin_unlock(&DRM(mem_lock));
 160                 return NULL;
 161         }
 162         spin_lock(&DRM(mem_lock));
 163         ++DRM(mem_stats)[area].succeed_count;
 164         DRM(mem_stats)[area].bytes_allocated += size;
 165         spin_unlock(&DRM(mem_lock));
 166         return pt;
 167 }
 168
 169 void *DRM(calloc)(size_t size, size_t nmemb, int area)
 170 {
 171         void *addr;
 172
 173         addr = DRM(alloc)(nmemb * size, area);
 174         if (addr != NULL)
 175                 memset((void *)addr, 0, size * nmemb);
 176
 177         return addr;
 178 }
 179
 180 void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area)
 181 {
 182         void *pt;
 183
 184         if (!(pt = DRM(alloc)(size, area))) return NULL;
 185         if (oldpt && oldsize) {
 186                 memcpy(pt, oldpt, oldsize);
 187                 DRM(free)(oldpt, oldsize, area);
 188         }
 189         return pt;
 190 }
 191
 192 void DRM(free)(void *pt, size_t size, int area)
 193 {
 194         int alloc_count;
 195         int free_count;
 196
 197         if (!pt) DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
 198         else     kfree(pt);
 199         spin_lock(&DRM(mem_lock));
 200         DRM(mem_stats)[area].bytes_freed += size;
 201         free_count  = ++DRM(mem_stats)[area].free_count;
 202         alloc_count =   DRM(mem_stats)[area].succeed_count;
 203         spin_unlock(&DRM(mem_lock));
 204         if (free_count > alloc_count) {
 205                 DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
 206                               free_count, alloc_count);
 207         }
 208 }
 209
 210 unsigned long DRM(alloc_pages)(int order, int area)
 211 {
 212         unsigned long address;
 213         unsigned long bytes       = PAGE_SIZE << order;
 214         unsigned long addr;
 215         unsigned int  sz;
 216
 217         spin_lock(&DRM(mem_lock));
 218         if ((DRM(ram_used) >> PAGE_SHIFT)
 219             > (DRM_RAM_PERCENT * DRM(ram_available)) / 100) {
 220                 spin_unlock(&DRM(mem_lock));
 221                 return 0;
 222         }
 223         spin_unlock(&DRM(mem_lock));
 224
 225         address = __get_free_pages(GFP_KERNEL, order);
 226         if (!address) {
 227                 spin_lock(&DRM(mem_lock));
 228                 ++DRM(mem_stats)[area].fail_count;
 229                 spin_unlock(&DRM(mem_lock));
 230                 return 0;
 231         }
 232         spin_lock(&DRM(mem_lock));
 233         ++DRM(mem_stats)[area].succeed_count;
 234         DRM(mem_stats)[area].bytes_allocated += bytes;
 235         DRM(ram_used)                        += bytes;
 236         spin_unlock(&DRM(mem_lock));
 237
 238
 239                                 /* Zero outside the lock */
 240         memset((void *)address, 0, bytes);
 241
 242                                 /* Reserve */
 243         for (addr = address, sz = bytes;
 244              sz > 0;
 245              addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 246                 SetPageReserved(virt_to_page(addr));
 247         }
 248
 249         return address;
 250 }
 251
 252 void DRM(free_pages)(unsigned long address, int order, int area)
 253 {
 254         unsigned long bytes = PAGE_SIZE << order;
 255         int               alloc_count;
 256         int               free_count;
 257         unsigned long addr;
 258         unsigned int  sz;
 259
 260         if (!address) {
 261                 DRM_MEM_ERROR(area, "Attempt to free address 0\n");
 262         } else {
 263                                 /* Unreserve */
 264                 for (addr = address, sz = bytes;
 265                      sz > 0;
 266                      addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 267                         ClearPageReserved(virt_to_page(addr));
 268                 }
 269                 free_pages(address, order);
 270         }
 271
 272         spin_lock(&DRM(mem_lock));
 273         free_count  = ++DRM(mem_stats)[area].free_count;
 274         alloc_count =   DRM(mem_stats)[area].succeed_count;
 275         DRM(mem_stats)[area].bytes_freed += bytes;
 276         DRM(ram_used)                    -= bytes;
 277         spin_unlock(&DRM(mem_lock));
 278         if (free_count > alloc_count) {
 279                 DRM_MEM_ERROR(area,
 280                               "Excess frees: %d frees, %d allocs\n",
 281                               free_count, alloc_count);
 282         }
 283 }
 284
 285 void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev)
 286 {
 287         void *pt;
 288
 289         if (!size) {
 290                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 291                               "Mapping 0 bytes at 0x%08lx\n", offset);
 292                 return NULL;
 293         }
 294
 295         if (!(pt = drm_ioremap(offset, size, dev))) {
 296                 spin_lock(&DRM(mem_lock));
 297                 ++DRM(mem_stats)[DRM_MEM_MAPPINGS].fail_count;
 298                 spin_unlock(&DRM(mem_lock));
 299                 return NULL;
 300         }
 301         spin_lock(&DRM(mem_lock));
 302         ++DRM(mem_stats)[DRM_MEM_MAPPINGS].succeed_count;
 303         DRM(mem_stats)[DRM_MEM_MAPPINGS].bytes_allocated += size;
 304         spin_unlock(&DRM(mem_lock));
 305         return pt;
 306 }
 307
 308 void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size, drm_device_t *dev)
 309 {
 310         void *pt;
 311
 312         if (!size) {
 313                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 314                               "Mapping 0 bytes at 0x%08lx\n", offset);
 315                 return NULL;
 316         }
 317
 318         if (!(pt = drm_ioremap_nocache(offset, size, dev))) {
 319                 spin_lock(&DRM(mem_lock));
 320                 ++DRM(mem_stats)[DRM_MEM_MAPPINGS].fail_count;
 321                 spin_unlock(&DRM(mem_lock));
 322                 return NULL;
 323         }
 324         spin_lock(&DRM(mem_lock));
 325         ++DRM(mem_stats)[DRM_MEM_MAPPINGS].succeed_count;
 326         DRM(mem_stats)[DRM_MEM_MAPPINGS].bytes_allocated += size;
 327         spin_unlock(&DRM(mem_lock));
 328         return pt;
 329 }
 330
 331 void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev)
 332 {
 333         int alloc_count;
 334         int free_count;
 335
 336         if (!pt)
 337                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 338                               "Attempt to free NULL pointer\n");
 339         else
 340                 drm_ioremapfree(pt, size, dev);
 341
 342         spin_lock(&DRM(mem_lock));
 343         DRM(mem_stats)[DRM_MEM_MAPPINGS].bytes_freed += size;
 344         free_count  = ++DRM(mem_stats)[DRM_MEM_MAPPINGS].free_count;
 345         alloc_count =   DRM(mem_stats)[DRM_MEM_MAPPINGS].succeed_count;
 346         spin_unlock(&DRM(mem_lock));
 347         if (free_count > alloc_count) {
 348                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 349                               "Excess frees: %d frees, %d allocs\n",
 350                               free_count, alloc_count);
 351         }
 352 }
 353
 354 #if __REALLY_HAVE_AGP
 355
 356 DRM_AGP_MEM *DRM(alloc_agp)(int pages, u32 type)
 357 {
 358         DRM_AGP_MEM *handle;
 359
 360         if (!pages) {
 361                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
 362                 return NULL;
 363         }
 364
 365         if ((handle = DRM(agp_allocate_memory)(pages, type))) {
 366                 spin_lock(&DRM(mem_lock));
 367                 ++DRM(mem_stats)[DRM_MEM_TOTALAGP].succeed_count;
 368                 DRM(mem_stats)[DRM_MEM_TOTALAGP].bytes_allocated
 369                         += pages << PAGE_SHIFT;
 370                 spin_unlock(&DRM(mem_lock));
 371                 return handle;
 372         }
 373         spin_lock(&DRM(mem_lock));
 374         ++DRM(mem_stats)[DRM_MEM_TOTALAGP].fail_count;
 375         spin_unlock(&DRM(mem_lock));
 376         return NULL;
 377 }
 378
 379 int DRM(free_agp)(DRM_AGP_MEM *handle, int pages)
 380 {
 381         int           alloc_count;
 382         int           free_count;
 383         int           retval = -EINVAL;
 384
 385         if (!handle) {
 386                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 387                               "Attempt to free NULL AGP handle\n");
 388                 return retval;
 389         }
 390
 391         if (DRM(agp_free_memory)(handle)) {
 392                 spin_lock(&DRM(mem_lock));
 393                 free_count  = ++DRM(mem_stats)[DRM_MEM_TOTALAGP].free_count;
 394                 alloc_count =   DRM(mem_stats)[DRM_MEM_TOTALAGP].succeed_count;
 395                 DRM(mem_stats)[DRM_MEM_TOTALAGP].bytes_freed
 396                         += pages << PAGE_SHIFT;
 397                 spin_unlock(&DRM(mem_lock));
 398                 if (free_count > alloc_count) {
 399                         DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 400                                       "Excess frees: %d frees, %d allocs\n",
 401                                       free_count, alloc_count);
 402                 }
 403                 return 0;
 404         }
 405         return retval;
 406 }
 407
 408 int DRM(bind_agp)(DRM_AGP_MEM *handle, unsigned int start)
 409 {
 410         int retcode = -EINVAL;
 411
 412         if (!handle) {
 413                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 414                               "Attempt to bind NULL AGP handle\n");
 415                 return retcode;
 416         }
 417
 418         if (!(retcode = DRM(agp_bind_memory)(handle, start))) {
 419                 spin_lock(&DRM(mem_lock));
 420                 ++DRM(mem_stats)[DRM_MEM_BOUNDAGP].succeed_count;
 421                 DRM(mem_stats)[DRM_MEM_BOUNDAGP].bytes_allocated
 422                         += handle->page_count << PAGE_SHIFT;
 423                 spin_unlock(&DRM(mem_lock));
 424                 return retcode;
 425         }
 426         spin_lock(&DRM(mem_lock));
 427         ++DRM(mem_stats)[DRM_MEM_BOUNDAGP].fail_count;
 428         spin_unlock(&DRM(mem_lock));
 429         return retcode;
 430 }
 431
 432 int DRM(unbind_agp)(DRM_AGP_MEM *handle)
 433 {
 434         int alloc_count;
 435         int free_count;
 436         int retcode = -EINVAL;
 437
 438         if (!handle) {
 439                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 440                               "Attempt to unbind NULL AGP handle\n");
 441                 return retcode;
 442         }
 443
 444         if ((retcode = DRM(agp_unbind_memory)(handle))) return retcode;
 445         spin_lock(&DRM(mem_lock));
 446         free_count  = ++DRM(mem_stats)[DRM_MEM_BOUNDAGP].free_count;
 447         alloc_count = DRM(mem_stats)[DRM_MEM_BOUNDAGP].succeed_count;
 448         DRM(mem_stats)[DRM_MEM_BOUNDAGP].bytes_freed
 449                 += handle->page_count << PAGE_SHIFT;
 450         spin_unlock(&DRM(mem_lock));
 451         if (free_count > alloc_count) {
 452                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 453                               "Excess frees: %d frees, %d allocs\n",
 454                               free_count, alloc_count);
 455         }
 456         return retcode;
 457 }
 458 #endif