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 "drmP.h"
  35
  36 typedef struct drm_mem_stats {
  37         const char *name;
  38         int succeed_count;
  39         int free_count;
  40         int fail_count;
  41         unsigned long bytes_allocated;
  42         unsigned long bytes_freed;
  43 } drm_mem_stats_t;
  44
  45 static DEFINE_SPINLOCK(drm_mem_lock);
  46 static unsigned long drm_ram_available = 0;     /* In pages */
  47 static unsigned long drm_ram_used = 0;
  48 static drm_mem_stats_t drm_mem_stats[] =
  49 {
  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_CTXLIST] = {"ctxlist"},
  71         [DRM_MEM_STUB] = {"stub"},
  72         {NULL, 0,}              /* Last entry must be null */
  73 };
  74
  75 void drm_mem_init (void) {
  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         drm_mem_stats_t *pt;
  97         int len = 0;
  98
  99         if (offset > DRM_PROC_LIMIT) {
 100                 *eof = 1;
 101                 return 0;
 102         }
 103
 104         *eof = 0;
 105         *start = &buf[offset];
 106
 107         DRM_PROC_PRINT("                  total counts                  "
 108                        " |    outstanding  \n");
 109         DRM_PROC_PRINT("type       alloc freed fail     bytes      freed"
 110                        " | allocs      bytes\n\n");
 111         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 112                        "system", 0, 0, 0,
 113                        drm_ram_available << (PAGE_SHIFT - 10));
 114         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 115                        "locked", 0, 0, 0, drm_ram_used >> 10);
 116         DRM_PROC_PRINT("\n");
 117         for (pt = drm_mem_stats; pt->name; pt++) {
 118                 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
 119                                pt->name,
 120                                pt->succeed_count,
 121                                pt->free_count,
 122                                pt->fail_count,
 123                                pt->bytes_allocated,
 124                                pt->bytes_freed,
 125                                pt->succeed_count - pt->free_count,
 126                                (long)pt->bytes_allocated
 127                                - (long)pt->bytes_freed);
 128         }
 129
 130         if (len > request + offset)
 131                 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         int ret;
 139
 140         spin_lock(&drm_mem_lock);
 141         ret = drm__mem_info (buf, start, offset, len, eof, data);
 142         spin_unlock(&drm_mem_lock);
 143         return ret;
 144 }
 145
 146 void *drm_alloc (size_t size, int area) {
 147         void *pt;
 148
 149         if (!size) {
 150                 DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
 151                 return NULL;
 152         }
 153
 154         if (!(pt = kmalloc(size, GFP_KERNEL))) {
 155                 spin_lock(&drm_mem_lock);
 156                 ++drm_mem_stats[area].fail_count;
 157                 spin_unlock(&drm_mem_lock);
 158                 return NULL;
 159         }
 160         spin_lock(&drm_mem_lock);
 161         ++drm_mem_stats[area].succeed_count;
 162         drm_mem_stats[area].bytes_allocated += size;
 163         spin_unlock(&drm_mem_lock);
 164         return pt;
 165 }
 166
 167 void *drm_calloc (size_t nmemb, size_t size, int area) {
 168         void *addr;
 169
 170         addr = drm_alloc (nmemb * size, area);
 171         if (addr != NULL)
 172                 memset((void *)addr, 0, size * nmemb);
 173
 174         return addr;
 175 }
 176
 177 void *drm_realloc (void *oldpt, size_t oldsize, size_t size, int area) {
 178         void *pt;
 179
 180         if (!(pt = drm_alloc (size, area)))
 181                 return NULL;
 182         if (oldpt && oldsize) {
 183                 memcpy(pt, oldpt, oldsize);
 184                 drm_free (oldpt, oldsize, area);
 185         }
 186         return pt;
 187 }
 188
 189 void drm_free (void *pt, size_t size, int area) {
 190         int alloc_count;
 191         int free_count;
 192
 193         if (!pt)
 194                 DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
 195         else
 196                 kfree(pt);
 197         spin_lock(&drm_mem_lock);
 198         drm_mem_stats[area].bytes_freed += size;
 199         free_count = ++drm_mem_stats[area].free_count;
 200         alloc_count = drm_mem_stats[area].succeed_count;
 201         spin_unlock(&drm_mem_lock);
 202         if (free_count > alloc_count) {
 203                 DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
 204                               free_count, alloc_count);
 205         }
 206 }
 207
 208 #if __OS_HAS_AGP
 209
 210 DRM_AGP_MEM *drm_alloc_agp (drm_device_t *dev, int pages, u32 type) {
 211         DRM_AGP_MEM *handle;
 212
 213         if (!pages) {
 214                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
 215                 return NULL;
 216         }
 217
 218         if ((handle = drm_agp_allocate_memory (pages, type))) {
 219                 spin_lock(&drm_mem_lock);
 220                 ++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 221                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
 222                     += pages << PAGE_SHIFT;
 223                 spin_unlock(&drm_mem_lock);
 224                 return handle;
 225         }
 226         spin_lock(&drm_mem_lock);
 227         ++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
 228         spin_unlock(&drm_mem_lock);
 229         return NULL;
 230 }
 231
 232 int drm_free_agp (DRM_AGP_MEM * handle, int pages) {
 233         int alloc_count;
 234         int free_count;
 235         int retval = -EINVAL;
 236
 237         if (!handle) {
 238                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 239                               "Attempt to free NULL AGP handle\n");
 240                 return retval;
 241         }
 242
 243         if (drm_agp_free_memory (handle)) {
 244                 spin_lock(&drm_mem_lock);
 245                 free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
 246                 alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
 247                 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
 248                     += pages << PAGE_SHIFT;
 249                 spin_unlock(&drm_mem_lock);
 250                 if (free_count > alloc_count) {
 251                         DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 252                                       "Excess frees: %d frees, %d allocs\n",
 253                                       free_count, alloc_count);
 254                 }
 255                 return 0;
 256         }
 257         return retval;
 258 }
 259
 260 int drm_bind_agp (DRM_AGP_MEM * handle, unsigned int start) {
 261         int retcode = -EINVAL;
 262
 263         if (!handle) {
 264                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 265                               "Attempt to bind NULL AGP handle\n");
 266                 return retcode;
 267         }
 268
 269         if (!(retcode = drm_agp_bind_memory (handle, start))) {
 270                 spin_lock(&drm_mem_lock);
 271                 ++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 272                 drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
 273                     += handle->page_count << PAGE_SHIFT;
 274                 spin_unlock(&drm_mem_lock);
 275                 return retcode;
 276         }
 277         spin_lock(&drm_mem_lock);
 278         ++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
 279         spin_unlock(&drm_mem_lock);
 280         return retcode;
 281 }
 282
 283 int drm_unbind_agp (DRM_AGP_MEM * handle) {
 284         int alloc_count;
 285         int free_count;
 286         int retcode = -EINVAL;
 287
 288         if (!handle) {
 289                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 290                               "Attempt to unbind NULL AGP handle\n");
 291                 return retcode;
 292         }
 293
 294         if ((retcode = drm_agp_unbind_memory (handle)))
 295                 return retcode;
 296         spin_lock(&drm_mem_lock);
 297         free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
 298         alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
 299         drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
 300             += handle->page_count << PAGE_SHIFT;
 301         spin_unlock(&drm_mem_lock);
 302         if (free_count > alloc_count) {
 303                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 304                               "Excess frees: %d frees, %d allocs\n",
 305                               free_count, alloc_count);
 306         }
 307         return retcode;
 308 }
 309 #endif