linux-core/drm_memory.h

   1 /* drm_memory.h -- Memory management wrappers for DRM -*- linux-c -*-
   2  * Created: Thu Feb  4 14:00:34 1999 by faith@valinux.com
   3  *
   4  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors:
  28  *    Rickard E. (Rik) Faith <faith@valinux.com>
  29  *    Gareth Hughes <gareth@valinux.com>
  30  */
  31
  32 #define __NO_VERSION__
  33 #include <linux/config.h>
  34 #include "drmP.h"
  35 #include <linux/wrapper.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 #if LINUX_VERSION_CODE < 0x020317
  89                                 /* Changed to page count in 2.3.23 */
  90         DRM(ram_available) = si.totalram >> PAGE_SHIFT;
  91 #else
  92         DRM(ram_available) = si.totalram;
  93 #endif
  94         DRM(ram_used)      = 0;
  95 }
  96
  97 /* drm_mem_info is called whenever a process reads /dev/drm/mem. */
  98
  99 static int DRM(_mem_info)(char *buf, char **start, off_t offset,
 100                           int request, int *eof, void *data)
 101 {
 102         drm_mem_stats_t *pt;
 103         int             len = 0;
 104
 105         if (offset > DRM_PROC_LIMIT) {
 106                 *eof = 1;
 107                 return 0;
 108         }
 109
 110         *eof   = 0;
 111         *start = &buf[offset];
 112
 113         DRM_PROC_PRINT("                  total counts                  "
 114                        " |    outstanding  \n");
 115         DRM_PROC_PRINT("type       alloc freed fail     bytes      freed"
 116                        " | allocs      bytes\n\n");
 117         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 118                        "system", 0, 0, 0,
 119                        DRM(ram_available) << (PAGE_SHIFT - 10));
 120         DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
 121                        "locked", 0, 0, 0, DRM(ram_used) >> 10);
 122         DRM_PROC_PRINT("\n");
 123         for (pt = DRM(mem_stats); pt->name; pt++) {
 124                 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
 125                                pt->name,
 126                                pt->succeed_count,
 127                                pt->free_count,
 128                                pt->fail_count,
 129                                pt->bytes_allocated,
 130                                pt->bytes_freed,
 131                                pt->succeed_count - pt->free_count,
 132                                (long)pt->bytes_allocated
 133                                - (long)pt->bytes_freed);
 134         }
 135
 136         if (len > request + offset) return request;
 137         *eof = 1;
 138         return len - offset;
 139 }
 140
 141 int DRM(mem_info)(char *buf, char **start, off_t offset,
 142                   int len, int *eof, void *data)
 143 {
 144         int ret;
 145
 146         spin_lock(&DRM(mem_lock));
 147         ret = DRM(_mem_info)(buf, start, offset, len, eof, data);
 148         spin_unlock(&DRM(mem_lock));
 149         return ret;
 150 }
 151
 152 void *DRM(alloc)(size_t size, int area)
 153 {
 154         void *pt;
 155
 156         if (!size) {
 157                 DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
 158                 return NULL;
 159         }
 160
 161         if (!(pt = kmalloc(size, GFP_KERNEL))) {
 162                 spin_lock(&DRM(mem_lock));
 163                 ++DRM(mem_stats)[area].fail_count;
 164                 spin_unlock(&DRM(mem_lock));
 165                 return NULL;
 166         }
 167         spin_lock(&DRM(mem_lock));
 168         ++DRM(mem_stats)[area].succeed_count;
 169         DRM(mem_stats)[area].bytes_allocated += size;
 170         spin_unlock(&DRM(mem_lock));
 171         return pt;
 172 }
 173
 174 void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area)
 175 {
 176         void *pt;
 177
 178         if (!(pt = DRM(alloc)(size, area))) return NULL;
 179         if (oldpt && oldsize) {
 180                 memcpy(pt, oldpt, oldsize);
 181                 DRM(free)(oldpt, oldsize, area);
 182         }
 183         return pt;
 184 }
 185
 186 char *DRM(strdup)(const char *s, int area)
 187 {
 188         char *pt;
 189         int      length = s ? strlen(s) : 0;
 190
 191         if (!(pt = DRM(alloc)(length+1, area))) return NULL;
 192         strcpy(pt, s);
 193         return pt;
 194 }
 195
 196 void DRM(strfree)(const char *s, int area)
 197 {
 198         unsigned int size;
 199
 200         if (!s) return;
 201
 202         size = 1 + (s ? strlen(s) : 0);
 203         DRM(free)((void *)s, size, area);
 204 }
 205
 206 void DRM(free)(void *pt, size_t size, int area)
 207 {
 208         int alloc_count;
 209         int free_count;
 210
 211         if (!pt) DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
 212         else     kfree(pt);
 213         spin_lock(&DRM(mem_lock));
 214         DRM(mem_stats)[area].bytes_freed += size;
 215         free_count  = ++DRM(mem_stats)[area].free_count;
 216         alloc_count =   DRM(mem_stats)[area].succeed_count;
 217         spin_unlock(&DRM(mem_lock));
 218         if (free_count > alloc_count) {
 219                 DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
 220                               free_count, alloc_count);
 221         }
 222 }
 223
 224 unsigned long DRM(alloc_pages)(int order, int area)
 225 {
 226         unsigned long address;
 227         unsigned long bytes       = PAGE_SIZE << order;
 228         unsigned long addr;
 229         unsigned int  sz;
 230
 231         spin_lock(&DRM(mem_lock));
 232         if ((DRM(ram_used) >> PAGE_SHIFT)
 233             > (DRM_RAM_PERCENT * DRM(ram_available)) / 100) {
 234                 spin_unlock(&DRM(mem_lock));
 235                 return 0;
 236         }
 237         spin_unlock(&DRM(mem_lock));
 238
 239         address = __get_free_pages(GFP_KERNEL, order);
 240         if (!address) {
 241                 spin_lock(&DRM(mem_lock));
 242                 ++DRM(mem_stats)[area].fail_count;
 243                 spin_unlock(&DRM(mem_lock));
 244                 return 0;
 245         }
 246         spin_lock(&DRM(mem_lock));
 247         ++DRM(mem_stats)[area].succeed_count;
 248         DRM(mem_stats)[area].bytes_allocated += bytes;
 249         DRM(ram_used)                        += bytes;
 250         spin_unlock(&DRM(mem_lock));
 251
 252
 253                                 /* Zero outside the lock */
 254         memset((void *)address, 0, bytes);
 255
 256                                 /* Reserve */
 257         for (addr = address, sz = bytes;
 258              sz > 0;
 259              addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 260 #if LINUX_VERSION_CODE >= 0x020400
 261                                 /* Argument type changed in 2.4.0-test6/pre8 */
 262                 mem_map_reserve(virt_to_page(addr));
 263 #else
 264                 mem_map_reserve(MAP_NR(addr));
 265 #endif
 266         }
 267
 268         return address;
 269 }
 270
 271 void DRM(free_pages)(unsigned long address, int order, int area)
 272 {
 273         unsigned long bytes = PAGE_SIZE << order;
 274         int               alloc_count;
 275         int               free_count;
 276         unsigned long addr;
 277         unsigned int  sz;
 278
 279         if (!address) {
 280                 DRM_MEM_ERROR(area, "Attempt to free address 0\n");
 281         } else {
 282                                 /* Unreserve */
 283                 for (addr = address, sz = bytes;
 284                      sz > 0;
 285                      addr += PAGE_SIZE, sz -= PAGE_SIZE) {
 286 #if LINUX_VERSION_CODE >= 0x020400
 287                                 /* Argument type changed in 2.4.0-test6/pre8 */
 288                         mem_map_unreserve(virt_to_page(addr));
 289 #else
 290                         mem_map_unreserve(MAP_NR(addr));
 291 #endif
 292                 }
 293                 free_pages(address, order);
 294         }
 295
 296         spin_lock(&DRM(mem_lock));
 297         free_count  = ++DRM(mem_stats)[area].free_count;
 298         alloc_count =   DRM(mem_stats)[area].succeed_count;
 299         DRM(mem_stats)[area].bytes_freed += bytes;
 300         DRM(ram_used)                    -= bytes;
 301         spin_unlock(&DRM(mem_lock));
 302         if (free_count > alloc_count) {
 303                 DRM_MEM_ERROR(area,
 304                               "Excess frees: %d frees, %d allocs\n",
 305                               free_count, alloc_count);
 306         }
 307 }
 308
 309 void *DRM(ioremap)(unsigned long offset, unsigned long size)
 310 {
 311         void *pt;
 312
 313         if (!size) {
 314                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 315                               "Mapping 0 bytes at 0x%08lx\n", offset);
 316                 return NULL;
 317         }
 318
 319         if (!(pt = ioremap(offset, size))) {
 320                 spin_lock(&DRM(mem_lock));
 321                 ++DRM(mem_stats)[DRM_MEM_MAPPINGS].fail_count;
 322                 spin_unlock(&DRM(mem_lock));
 323                 return NULL;
 324         }
 325         spin_lock(&DRM(mem_lock));
 326         ++DRM(mem_stats)[DRM_MEM_MAPPINGS].succeed_count;
 327         DRM(mem_stats)[DRM_MEM_MAPPINGS].bytes_allocated += size;
 328         spin_unlock(&DRM(mem_lock));
 329         return pt;
 330 }
 331
 332 void DRM(ioremapfree)(void *pt, unsigned long size)
 333 {
 334         int alloc_count;
 335         int free_count;
 336
 337         if (!pt)
 338                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 339                               "Attempt to free NULL pointer\n");
 340         else
 341                 iounmap(pt);
 342
 343         spin_lock(&DRM(mem_lock));
 344         DRM(mem_stats)[DRM_MEM_MAPPINGS].bytes_freed += size;
 345         free_count  = ++DRM(mem_stats)[DRM_MEM_MAPPINGS].free_count;
 346         alloc_count =   DRM(mem_stats)[DRM_MEM_MAPPINGS].succeed_count;
 347         spin_unlock(&DRM(mem_lock));
 348         if (free_count > alloc_count) {
 349                 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
 350                               "Excess frees: %d frees, %d allocs\n",
 351                               free_count, alloc_count);
 352         }
 353 }
 354
 355 #if __REALLY_HAVE_AGP
 356
 357 agp_memory *DRM(alloc_agp)(int pages, u32 type)
 358 {
 359         agp_memory *handle;
 360
 361         if (!pages) {
 362                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
 363                 return NULL;
 364         }
 365
 366         if ((handle = DRM(agp_allocate_memory)(pages, type))) {
 367                 spin_lock(&DRM(mem_lock));
 368                 ++DRM(mem_stats)[DRM_MEM_TOTALAGP].succeed_count;
 369                 DRM(mem_stats)[DRM_MEM_TOTALAGP].bytes_allocated
 370                         += pages << PAGE_SHIFT;
 371                 spin_unlock(&DRM(mem_lock));
 372                 return handle;
 373         }
 374         spin_lock(&DRM(mem_lock));
 375         ++DRM(mem_stats)[DRM_MEM_TOTALAGP].fail_count;
 376         spin_unlock(&DRM(mem_lock));
 377         return NULL;
 378 }
 379
 380 int DRM(free_agp)(agp_memory *handle, int pages)
 381 {
 382         int           alloc_count;
 383         int           free_count;
 384         int           retval = -EINVAL;
 385
 386         if (!handle) {
 387                 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 388                               "Attempt to free NULL AGP handle\n");
 389                 return retval;;
 390         }
 391
 392         if (DRM(agp_free_memory)(handle)) {
 393                 spin_lock(&DRM(mem_lock));
 394                 free_count  = ++DRM(mem_stats)[DRM_MEM_TOTALAGP].free_count;
 395                 alloc_count =   DRM(mem_stats)[DRM_MEM_TOTALAGP].succeed_count;
 396                 DRM(mem_stats)[DRM_MEM_TOTALAGP].bytes_freed
 397                         += pages << PAGE_SHIFT;
 398                 spin_unlock(&DRM(mem_lock));
 399                 if (free_count > alloc_count) {
 400                         DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
 401                                       "Excess frees: %d frees, %d allocs\n",
 402                                       free_count, alloc_count);
 403                 }
 404                 return 0;
 405         }
 406         return retval;
 407 }
 408
 409 int DRM(bind_agp)(agp_memory *handle, unsigned int start)
 410 {
 411         int retcode = -EINVAL;
 412
 413         if (!handle) {
 414                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 415                               "Attempt to bind NULL AGP handle\n");
 416                 return retcode;
 417         }
 418
 419         if (!(retcode = DRM(agp_bind_memory)(handle, start))) {
 420                 spin_lock(&DRM(mem_lock));
 421                 ++DRM(mem_stats)[DRM_MEM_BOUNDAGP].succeed_count;
 422                 DRM(mem_stats)[DRM_MEM_BOUNDAGP].bytes_allocated
 423                         += handle->page_count << PAGE_SHIFT;
 424                 spin_unlock(&DRM(mem_lock));
 425                 return retcode;
 426         }
 427         spin_lock(&DRM(mem_lock));
 428         ++DRM(mem_stats)[DRM_MEM_BOUNDAGP].fail_count;
 429         spin_unlock(&DRM(mem_lock));
 430         return retcode;
 431 }
 432
 433 int DRM(unbind_agp)(agp_memory *handle)
 434 {
 435         int alloc_count;
 436         int free_count;
 437         int retcode = -EINVAL;
 438
 439         if (!handle) {
 440                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 441                               "Attempt to unbind NULL AGP handle\n");
 442                 return retcode;
 443         }
 444
 445         if ((retcode = DRM(agp_unbind_memory)(handle))) return retcode;
 446         spin_lock(&DRM(mem_lock));
 447         free_count  = ++DRM(mem_stats)[DRM_MEM_BOUNDAGP].free_count;
 448         alloc_count = DRM(mem_stats)[DRM_MEM_BOUNDAGP].succeed_count;
 449         DRM(mem_stats)[DRM_MEM_BOUNDAGP].bytes_freed
 450                 += handle->page_count << PAGE_SHIFT;
 451         spin_unlock(&DRM(mem_lock));
 452         if (free_count > alloc_count) {
 453                 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 454                               "Excess frees: %d frees, %d allocs\n",
 455                               free_count, alloc_count);
 456         }
 457         return retcode;
 458 }
 459 #endif