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 "drmP.h"
  35
  36 #ifdef DEBUG_MEMORY
  37
  38 typedef struct drm_mem_stats {
  39         const char *name;
  40         int succeed_count;
  41         int free_count;
  42         int fail_count;
  43         unsigned long bytes_allocated;
  44         unsigned long bytes_freed;
  45 } drm_mem_stats_t;
  46
  47 static spinlock_t drm_mem_lock = SPIN_LOCK_UNLOCKED;
  48 static unsigned long drm_ram_available = 0;     /* In pages */
  49 static unsigned long drm_ram_used = 0;
  50 static drm_mem_stats_t drm_mem_stats[] = {
  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 {
  78         drm_mem_stats_t *mem;
  79         struct sysinfo si;
  80
  81         for (mem = drm_mem_stats; mem->name; ++mem) {
  82                 mem->succeed_count = 0;
  83                 mem->free_count = 0;
  84                 mem->fail_count = 0;
  85                 mem->bytes_allocated = 0;
  86                 mem->bytes_freed = 0;
  87         }
  88
  89         si_meminfo(&si);
  90         drm_ram_available = si.totalram;
  91         drm_ram_used = 0;
  92 }
  93
  94 /* drm_mem_info is called whenever a process reads /dev/drm/mem. */
  95
  96 static int drm__mem_info(char *buf, char **start, off_t offset,
  97                          int request, int *eof, void *data)
  98 {
  99         drm_mem_stats_t *pt;
 100         int len = 0;
 101
 102         if (offset > DRM_PROC_LIMIT) {
 103                 *eof = 1;
 104                 return 0;
 105         }
 106
 107         *eof = 0;
 108         *start = &buf[offset];
 109
 110         DRM_PROC_PRINT("                  total counts                  "
 111                        " |    outstanding  \n");
 112         DRM_PROC_PRINT("type       alloc freed fail     bytes      freed"
 113                        " | allocs      bytes\n\n");
 114         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 115                        "system", 0, 0, 0,
 116                        drm_ram_available << (PAGE_SHIFT - 10));
 117         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 118                        "locked", 0, 0, 0, drm_ram_used >> 10);
 119         DRM_PROC_PRINT("\n");
 120         for (pt = drm_mem_stats; pt->name; pt++) {
 121                 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
 122                                pt->name,
 123                                pt->succeed_count,
 124                                pt->free_count,
 125                                pt->fail_count,
 126                                pt->bytes_allocated,
 127                                pt->bytes_freed,
 128                                pt->succeed_count - pt->free_count,
 129                                (long)pt->bytes_allocated
 130                                - (long)pt->bytes_freed);
 131         }
 132
 133         if (len > request + offset)
 134                 return request;
 135         *eof = 1;
 136         return len - offset;
 137 }
 138
 139 int drm_mem_info(char *buf, char **start, off_t offset,
 140                  int len, int *eof, void *data)
 141 {
 142         int ret;
 143
 144         spin_lock(&drm_mem_lock);
 145         ret = drm__mem_info(buf, start, offset, len, eof, data);
 146         spin_unlock(&drm_mem_lock);
 147         return ret;
 148 }
 149
 150 void *drm_alloc(size_t size, int area)
 151 {
 152         void *pt;
 153
 154         if (!size) {
 155                 DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
 156                 return NULL;
 157         }
 158
 159         if (!(pt = kmalloc(size, GFP_KERNEL))) {
 160                 spin_lock(&drm_mem_lock);
 161                 ++drm_mem_stats[area].fail_count;
 162                 spin_unlock(&drm_mem_lock);
 163                 return NULL;
 164         }
 165         spin_lock(&drm_mem_lock);
 166         ++drm_mem_stats[area].succeed_count;
 167         drm_mem_stats[area].bytes_allocated += size;
 168         spin_unlock(&drm_mem_lock);
 169         return pt;
 170 }
 171 EXPORT_SYMBOL(drm_alloc);
 172
 173 void *drm_calloc(size_t nmemb, size_t size, int area)
 174 {
 175         void *addr;
 176
 177         addr = drm_alloc(nmemb * size, area);
 178         if (addr != NULL)
 179                 memset((void *)addr, 0, size * nmemb);
 180
 181         return addr;
 182 }
 183 EXPORT_SYMBOL(drm_calloc);
 184
 185 void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
 186 {
 187         void *pt;
 188
 189         if (!(pt = drm_alloc(size, area)))
 190                 return NULL;
 191         if (oldpt && oldsize) {
 192                 memcpy(pt, oldpt, oldsize);
 193                 drm_free(oldpt, oldsize, area);
 194         }
 195         return pt;
 196 }
 197 EXPORT_SYMBOL(drm_realloc);
 198
 199 void drm_free(void *pt, size_t size, int area)
 200 {
 201         int alloc_count;
 202         int free_count;
 203
 204         if (!pt)
 205                 DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
 206         else
 207                 kfree(pt);
 208         spin_lock(&drm_mem_lock);
 209         drm_mem_stats[area].bytes_freed += size;
 210         free_count = ++drm_mem_stats[area].free_count;
 211         alloc_count = drm_mem_stats[area].succeed_count;
 212         spin_unlock(&drm_mem_lock);
 213         if (free_count > alloc_count) {
 214                 DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
 215                               free_count, alloc_count);
 216         }
 217 }
 218 EXPORT_SYMBOL(drm_free);
 219
 220 unsigned long drm_alloc_pages(int order, int area)
 221 {
 222         unsigned long address;
 223         unsigned long bytes = PAGE_SIZE << order;
 224         unsigned long addr;
 225         unsigned int sz;
 226
 227         spin_lock(&drm_mem_lock);
 228         if ((drm_ram_used >> PAGE_SHIFT)
 229             > (DRM_RAM_PERCENT * drm_ram_available) / 100) {
 230                 spin_unlock(&drm_mem_lock);
 231                 return 0;
 232         }
 233         spin_unlock(&drm_mem_lock);
 234
 235         address = __get_free_pages(GFP_KERNEL, order);
 236         if (!address) {
 237                 spin_lock(&drm_mem_lock);
 238                 ++drm_mem_stats[area].fail_count;
 239                 spin_unlock(&drm_mem_lock);
 240                 return 0;
 241         }
 242         spin_lock(&drm_mem_lock);
 243         ++drm_mem_stats[area].succeed_count;
 244         drm_mem_stats[area].bytes_allocated += bytes;
 245         drm_ram_used += bytes;
 246         spin_unlock(&drm_mem_lock);
 247
 248         /* Zero outside the lock */
 249         memset((void *)address, 0, bytes);
 250
 251         /* Reserve */
 252         for (addr = address, sz = bytes;
 253              sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 254                 SetPageReserved(virt_to_page(addr));
 255         }
 256
 257         return address;
 258 }
 259
 260 void drm_free_pages(unsigned long address, int order, int area)
 261 {
 262         unsigned long bytes = PAGE_SIZE << order;
 263         int alloc_count;
 264         int free_count;
 265         unsigned long addr;
 266         unsigned int sz;
 267
 268         if (!address) {
 269                 DRM_MEM_ERROR(area, "Attempt to free address 0\n");
 270         } else {
 271                 /* Unreserve */
 272                 for (addr = address, sz = bytes;
 273                      sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 274                         ClearPageReserved(virt_to_page(addr));
 275                 }
 276                 free_pages(address, order);
 277         }
 278
 279         spin_lock(&drm_mem_lock);
 280         free_count = ++drm_mem_stats[area].free_count;
 281         alloc_count = drm_mem_stats[area].succeed_count;
 282         drm_mem_stats[area].bytes_freed += bytes;
 283         drm_ram_used -= bytes;
 284         spin_unlock(&drm_mem_lock);
 285         if (free_count > alloc_count) {
 286                 DRM_MEM_ERROR(area,
 287                               "Excess frees: %d frees, %d allocs\n",
 288                               free_count, alloc_count);
 289         }
 290 }
 291
 292 #if __OS_HAS_AGP
 293
 294 DRM_AGP_MEM *drm_alloc_agp(struct drm_device *dev, int pages, u32 type)
 295 {
 296         DRM_AGP_MEM *handle;
 297
 298         if (!pages) {
 299                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
 300                 return NULL;
 301         }
 302
 303 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
 304         if ((handle = drm_agp_allocate_memory(pages, type))) {
 305 #else
 306         if ((handle = drm_agp_allocate_memory(dev->agp->bridge, pages, type))) {
 307 #endif
 308                 spin_lock(&drm_mem_lock);
 309                 ++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 310                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
 311                     += pages << PAGE_SHIFT;
 312                 spin_unlock(&drm_mem_lock);
 313                 return handle;
 314         }
 315         spin_lock(&drm_mem_lock);
 316         ++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
 317         spin_unlock(&drm_mem_lock);
 318         return NULL;
 319 }
 320
 321 int drm_free_agp(DRM_AGP_MEM * handle, int pages)
 322 {
 323         int alloc_count;
 324         int free_count;
 325         int retval = -EINVAL;
 326
 327         if (!handle) {
 328                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 329                               "Attempt to free NULL AGP handle\n");
 330                 return retval;
 331         }
 332
 333         if (drm_agp_free_memory(handle)) {
 334                 spin_lock(&drm_mem_lock);
 335                 free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
 336                 alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 337                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
 338                     += pages << PAGE_SHIFT;
 339                 spin_unlock(&drm_mem_lock);
 340                 if (free_count > alloc_count) {
 341                         DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 342                                       "Excess frees: %d frees, %d allocs\n",
 343                                       free_count, alloc_count);
 344                 }
 345                 return 0;
 346         }
 347         return retval;
 348 }
 349
 350 int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
 351 {
 352         int retcode = -EINVAL;
 353
 354         if (!handle) {
 355                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 356                               "Attempt to bind NULL AGP handle\n");
 357                 return retcode;
 358         }
 359
 360         if (!(retcode = drm_agp_bind_memory(handle, start))) {
 361                 spin_lock(&drm_mem_lock);
 362                 ++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 363                 drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
 364                     += handle->page_count << PAGE_SHIFT;
 365                 spin_unlock(&drm_mem_lock);
 366                 return retcode;
 367         }
 368         spin_lock(&drm_mem_lock);
 369         ++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
 370         spin_unlock(&drm_mem_lock);
 371         return retcode;
 372 }
 373
 374 int drm_unbind_agp(DRM_AGP_MEM * handle)
 375 {
 376         int alloc_count;
 377         int free_count;
 378         int retcode = -EINVAL;
 379
 380         if (!handle) {
 381                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 382                               "Attempt to unbind NULL AGP handle\n");
 383                 return retcode;
 384         }
 385
 386         if ((retcode = drm_agp_unbind_memory(handle)))
 387                 return retcode;
 388         spin_lock(&drm_mem_lock);
 389         free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
 390         alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 391         drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
 392             += handle->page_count << PAGE_SHIFT;
 393         spin_unlock(&drm_mem_lock);
 394         if (free_count > alloc_count) {
 395                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 396                               "Excess frees: %d frees, %d allocs\n",
 397                               free_count, alloc_count);
 398         }
 399         return retcode;
 400 }
 401
 402 #endif
 403 #endif