drivers/char/drm/drmP.h

   1 /**
   2  * \file drmP.h
   3  * Private header for Direct Rendering Manager
   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 #ifndef _DRM_P_H_
  35 #define _DRM_P_H_
  36
  37 /* If you want the memory alloc debug functionality, change define below */
  38 /* #define DEBUG_MEMORY */
  39
  40 #ifdef __KERNEL__
  41 #ifdef __alpha__
  42 /* add include of current.h so that "current" is defined
  43  * before static inline funcs in wait.h. Doing this so we
  44  * can build the DRM (part of PI DRI). 4/21/2000 S + B */
  45 #include <asm/current.h>
  46 #endif                          /* __alpha__ */
  47 #include <linux/module.h>
  48 #include <linux/kernel.h>
  49 #include <linux/miscdevice.h>
  50 #include <linux/fs.h>
  51 #include <linux/proc_fs.h>
  52 #include <linux/init.h>
  53 #include <linux/file.h>
  54 #include <linux/pci.h>
  55 #include <linux/jiffies.h>
  56 #include <linux/smp_lock.h>     /* For (un)lock_kernel */
  57 #include <linux/mm.h>
  58 #include <linux/cdev.h>
  59 #include <linux/mutex.h>
  60 #if defined(__alpha__) || defined(__powerpc__)
  61 #include <asm/pgtable.h>        /* For pte_wrprotect */
  62 #endif
  63 #include <asm/io.h>
  64 #include <asm/mman.h>
  65 #include <asm/uaccess.h>
  66 #ifdef CONFIG_MTRR
  67 #include <asm/mtrr.h>
  68 #endif
  69 #if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
  70 #include <linux/types.h>
  71 #include <linux/agp_backend.h>
  72 #endif
  73 #include <linux/workqueue.h>
  74 #include <linux/poll.h>
  75 #include <asm/pgalloc.h>
  76 #include "drm.h"
  77
  78 #include <linux/idr.h>
  79
  80 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
  81 #define __OS_HAS_MTRR (defined(CONFIG_MTRR))
  82
  83 struct drm_file;
  84 struct drm_device;
  85
  86 #include "drm_os_linux.h"
  87 #include "drm_hashtab.h"
  88
  89 /***********************************************************************/
  90 /** \name DRM template customization defaults */
  91 /*@{*/
  92
  93 /* driver capabilities and requirements mask */
  94 #define DRIVER_USE_AGP     0x1
  95 #define DRIVER_REQUIRE_AGP 0x2
  96 #define DRIVER_USE_MTRR    0x4
  97 #define DRIVER_PCI_DMA     0x8
  98 #define DRIVER_SG          0x10
  99 #define DRIVER_HAVE_DMA    0x20
 100 #define DRIVER_HAVE_IRQ    0x40
 101 #define DRIVER_IRQ_SHARED  0x80
 102 #define DRIVER_IRQ_VBL     0x100
 103 #define DRIVER_DMA_QUEUE   0x200
 104 #define DRIVER_FB_DMA      0x400
 105 #define DRIVER_IRQ_VBL2    0x800
 106
 107 /***********************************************************************/
 108 /** \name Begin the DRM... */
 109 /*@{*/
 110
 111 #define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
 112                                      also include looping detection. */
 113
 114 #define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
 115 #define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
 116 #define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
 117 #define DRM_LOOPING_LIMIT     5000000
 118 #define DRM_TIME_SLICE        (HZ/20)  /**< Time slice for GLXContexts */
 119 #define DRM_LOCK_SLICE        1 /**< Time slice for lock, in jiffies */
 120
 121 #define DRM_FLAG_DEBUG    0x01
 122
 123 #define DRM_MEM_DMA        0
 124 #define DRM_MEM_SAREA      1
 125 #define DRM_MEM_DRIVER     2
 126 #define DRM_MEM_MAGIC      3
 127 #define DRM_MEM_IOCTLS     4
 128 #define DRM_MEM_MAPS       5
 129 #define DRM_MEM_VMAS       6
 130 #define DRM_MEM_BUFS       7
 131 #define DRM_MEM_SEGS       8
 132 #define DRM_MEM_PAGES      9
 133 #define DRM_MEM_FILES     10
 134 #define DRM_MEM_QUEUES    11
 135 #define DRM_MEM_CMDS      12
 136 #define DRM_MEM_MAPPINGS  13
 137 #define DRM_MEM_BUFLISTS  14
 138 #define DRM_MEM_AGPLISTS  15
 139 #define DRM_MEM_TOTALAGP  16
 140 #define DRM_MEM_BOUNDAGP  17
 141 #define DRM_MEM_CTXBITMAP 18
 142 #define DRM_MEM_STUB      19
 143 #define DRM_MEM_SGLISTS   20
 144 #define DRM_MEM_CTXLIST   21
 145 #define DRM_MEM_MM        22
 146 #define DRM_MEM_HASHTAB   23
 147
 148 #define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
 149 #define DRM_MAP_HASH_OFFSET 0x10000000
 150
 151 /*@}*/
 152
 153 /***********************************************************************/
 154 /** \name Macros to make printk easier */
 155 /*@{*/
 156
 157 /**
 158  * Error output.
 159  *
 160  * \param fmt printf() like format string.
 161  * \param arg arguments
 162  */
 163 #define DRM_ERROR(fmt, arg...) \
 164         printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __FUNCTION__ , ##arg)
 165
 166 /**
 167  * Memory error output.
 168  *
 169  * \param area memory area where the error occurred.
 170  * \param fmt printf() like format string.
 171  * \param arg arguments
 172  */
 173 #define DRM_MEM_ERROR(area, fmt, arg...) \
 174         printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __FUNCTION__, \
 175                drm_mem_stats[area].name , ##arg)
 176
 177 #define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)
 178
 179 /**
 180  * Debug output.
 181  *
 182  * \param fmt printf() like format string.
 183  * \param arg arguments
 184  */
 185 #if DRM_DEBUG_CODE
 186 #define DRM_DEBUG(fmt, arg...)                                          \
 187         do {                                                            \
 188                 if ( drm_debug )                        \
 189                         printk(KERN_DEBUG                               \
 190                                "[" DRM_NAME ":%s] " fmt ,       \
 191                                __FUNCTION__ , ##arg);                   \
 192         } while (0)
 193 #else
 194 #define DRM_DEBUG(fmt, arg...)           do { } while (0)
 195 #endif
 196
 197 #define DRM_PROC_LIMIT (PAGE_SIZE-80)
 198
 199 #define DRM_PROC_PRINT(fmt, arg...)                                     \
 200    len += sprintf(&buf[len], fmt , ##arg);                              \
 201    if (len > DRM_PROC_LIMIT) { *eof = 1; return len - offset; }
 202
 203 #define DRM_PROC_PRINT_RET(ret, fmt, arg...)                            \
 204    len += sprintf(&buf[len], fmt , ##arg);                              \
 205    if (len > DRM_PROC_LIMIT) { ret; *eof = 1; return len - offset; }
 206
 207 /*@}*/
 208
 209 /***********************************************************************/
 210 /** \name Internal types and structures */
 211 /*@{*/
 212
 213 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
 214
 215 #define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
 216 #define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
 217 #define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)
 218
 219 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 220 /**
 221  * Get the private SAREA mapping.
 222  *
 223  * \param _dev DRM device.
 224  * \param _ctx context number.
 225  * \param _map output mapping.
 226  */
 227 #define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {       \
 228         (_map) = (_dev)->context_sareas[_ctx];          \
 229 } while(0)
 230
 231 /**
 232  * Test that the hardware lock is held by the caller, returning otherwise.
 233  *
 234  * \param dev DRM device.
 235  * \param filp file pointer of the caller.
 236  */
 237 #define LOCK_TEST_WITH_RETURN( dev, file_priv )                         \
 238 do {                                                                    \
 239         if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) ||           \
 240              dev->lock.file_priv != file_priv ) {                       \
 241                 DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
 242                            __FUNCTION__, _DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ),\
 243                            dev->lock.file_priv, file_priv );            \
 244                 return -EINVAL;                                         \
 245         }                                                               \
 246 } while (0)
 247
 248 /**
 249  * Copy and IOCTL return string to user space
 250  */
 251 #define DRM_COPY( name, value )                                         \
 252         len = strlen( value );                                          \
 253         if ( len > name##_len ) len = name##_len;                       \
 254         name##_len = strlen( value );                                   \
 255         if ( len && name ) {                                            \
 256                 if ( copy_to_user( name, value, len ) )                 \
 257                         return -EFAULT;                                 \
 258         }
 259
 260 /**
 261  * Ioctl function type.
 262  *
 263  * \param inode device inode.
 264  * \param file_priv DRM file private pointer.
 265  * \param cmd command.
 266  * \param arg argument.
 267  */
 268 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
 269                         struct drm_file *file_priv);
 270
 271 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
 272                                unsigned long arg);
 273
 274 #define DRM_AUTH        0x1
 275 #define DRM_MASTER      0x2
 276 #define DRM_ROOT_ONLY   0x4
 277
 278 struct drm_ioctl_desc {
 279         unsigned int cmd;
 280         drm_ioctl_t *func;
 281         int flags;
 282 };
 283
 284 /**
 285  * Creates a driver or general drm_ioctl_desc array entry for the given
 286  * ioctl, for use by drm_ioctl().
 287  */
 288 #define DRM_IOCTL_DEF(ioctl, func, flags) \
 289         [DRM_IOCTL_NR(ioctl)] = {ioctl, func, flags}
 290
 291 struct drm_magic_entry {
 292         struct list_head head;
 293         struct drm_hash_item hash_item;
 294         struct drm_file *priv;
 295 };
 296
 297 struct drm_vma_entry {
 298         struct list_head head;
 299         struct vm_area_struct *vma;
 300         pid_t pid;
 301 };
 302
 303 /**
 304  * DMA buffer.
 305  */
 306 struct drm_buf {
 307         int idx;                       /**< Index into master buflist */
 308         int total;                     /**< Buffer size */
 309         int order;                     /**< log-base-2(total) */
 310         int used;                      /**< Amount of buffer in use (for DMA) */
 311         unsigned long offset;          /**< Byte offset (used internally) */
 312         void *address;                 /**< Address of buffer */
 313         unsigned long bus_address;     /**< Bus address of buffer */
 314         struct drm_buf *next;          /**< Kernel-only: used for free list */
 315         __volatile__ int waiting;      /**< On kernel DMA queue */
 316         __volatile__ int pending;      /**< On hardware DMA queue */
 317         wait_queue_head_t dma_wait;    /**< Processes waiting */
 318         struct drm_file *file_priv;    /**< Private of holding file descr */
 319         int context;                   /**< Kernel queue for this buffer */
 320         int while_locked;              /**< Dispatch this buffer while locked */
 321         enum {
 322                 DRM_LIST_NONE = 0,
 323                 DRM_LIST_FREE = 1,
 324                 DRM_LIST_WAIT = 2,
 325                 DRM_LIST_PEND = 3,
 326                 DRM_LIST_PRIO = 4,
 327                 DRM_LIST_RECLAIM = 5
 328         } list;                        /**< Which list we're on */
 329
 330         int dev_priv_size;               /**< Size of buffer private storage */
 331         void *dev_private;               /**< Per-buffer private storage */
 332 };
 333
 334 /** bufs is one longer than it has to be */
 335 struct drm_waitlist {
 336         int count;                      /**< Number of possible buffers */
 337         struct drm_buf **bufs;          /**< List of pointers to buffers */
 338         struct drm_buf **rp;                    /**< Read pointer */
 339         struct drm_buf **wp;                    /**< Write pointer */
 340         struct drm_buf **end;           /**< End pointer */
 341         spinlock_t read_lock;
 342         spinlock_t write_lock;
 343 };
 344
 345 struct drm_freelist {
 346         int initialized;               /**< Freelist in use */
 347         atomic_t count;                /**< Number of free buffers */
 348         struct drm_buf *next;          /**< End pointer */
 349
 350         wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
 351         int low_mark;                  /**< Low water mark */
 352         int high_mark;                 /**< High water mark */
 353         atomic_t wfh;                  /**< If waiting for high mark */
 354         spinlock_t lock;
 355 };
 356
 357 typedef struct drm_dma_handle {
 358         dma_addr_t busaddr;
 359         void *vaddr;
 360         size_t size;
 361 } drm_dma_handle_t;
 362
 363 /**
 364  * Buffer entry.  There is one of this for each buffer size order.
 365  */
 366 struct drm_buf_entry {
 367         int buf_size;                   /**< size */
 368         int buf_count;                  /**< number of buffers */
 369         struct drm_buf *buflist;                /**< buffer list */
 370         int seg_count;
 371         int page_order;
 372         struct drm_dma_handle **seglist;
 373
 374         struct drm_freelist freelist;
 375 };
 376
 377 /** File private data */
 378 struct drm_file {
 379         int authenticated;
 380         int master;
 381         int minor;
 382         pid_t pid;
 383         uid_t uid;
 384         drm_magic_t magic;
 385         unsigned long ioctl_count;
 386         struct list_head lhead;
 387         struct drm_head *head;
 388         int remove_auth_on_close;
 389         unsigned long lock_count;
 390         struct file *filp;
 391         void *driver_priv;
 392 };
 393
 394 /** Wait queue */
 395 struct drm_queue {
 396         atomic_t use_count;             /**< Outstanding uses (+1) */
 397         atomic_t finalization;          /**< Finalization in progress */
 398         atomic_t block_count;           /**< Count of processes waiting */
 399         atomic_t block_read;            /**< Queue blocked for reads */
 400         wait_queue_head_t read_queue;   /**< Processes waiting on block_read */
 401         atomic_t block_write;           /**< Queue blocked for writes */
 402         wait_queue_head_t write_queue;  /**< Processes waiting on block_write */
 403         atomic_t total_queued;          /**< Total queued statistic */
 404         atomic_t total_flushed;         /**< Total flushes statistic */
 405         atomic_t total_locks;           /**< Total locks statistics */
 406         enum drm_ctx_flags flags;       /**< Context preserving and 2D-only */
 407         struct drm_waitlist waitlist;   /**< Pending buffers */
 408         wait_queue_head_t flush_queue;  /**< Processes waiting until flush */
 409 };
 410
 411 /**
 412  * Lock data.
 413  */
 414 struct drm_lock_data {
 415         struct drm_hw_lock *hw_lock;    /**< Hardware lock */
 416         /** Private of lock holder's file (NULL=kernel) */
 417         struct drm_file *file_priv;
 418         wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
 419         unsigned long lock_time;        /**< Time of last lock in jiffies */
 420         spinlock_t spinlock;
 421         uint32_t kernel_waiters;
 422         uint32_t user_waiters;
 423         int idle_has_lock;
 424 };
 425
 426 /**
 427  * DMA data.
 428  */
 429 struct drm_device_dma {
 430
 431         struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   /**< buffers, grouped by their size order */
 432         int buf_count;                  /**< total number of buffers */
 433         struct drm_buf **buflist;               /**< Vector of pointers into drm_device_dma::bufs */
 434         int seg_count;
 435         int page_count;                 /**< number of pages */
 436         unsigned long *pagelist;        /**< page list */
 437         unsigned long byte_count;
 438         enum {
 439                 _DRM_DMA_USE_AGP = 0x01,
 440                 _DRM_DMA_USE_SG = 0x02,
 441                 _DRM_DMA_USE_FB = 0x04,
 442                 _DRM_DMA_USE_PCI_RO = 0x08
 443         } flags;
 444
 445 };
 446
 447 /**
 448  * AGP memory entry.  Stored as a doubly linked list.
 449  */
 450 struct drm_agp_mem {
 451         unsigned long handle;           /**< handle */
 452         DRM_AGP_MEM *memory;
 453         unsigned long bound;            /**< address */
 454         int pages;
 455         struct list_head head;
 456 };
 457
 458 /**
 459  * AGP data.
 460  *
 461  * \sa drm_agp_init() and drm_device::agp.
 462  */
 463 struct drm_agp_head {
 464         DRM_AGP_KERN agp_info;          /**< AGP device information */
 465         struct list_head memory;
 466         unsigned long mode;             /**< AGP mode */
 467         struct agp_bridge_data *bridge;
 468         int enabled;                    /**< whether the AGP bus as been enabled */
 469         int acquired;                   /**< whether the AGP device has been acquired */
 470         unsigned long base;
 471         int agp_mtrr;
 472         int cant_use_aperture;
 473         unsigned long page_mask;
 474 };
 475
 476 /**
 477  * Scatter-gather memory.
 478  */
 479 struct drm_sg_mem {
 480         unsigned long handle;
 481         void *virtual;
 482         int pages;
 483         struct page **pagelist;
 484         dma_addr_t *busaddr;
 485 };
 486
 487 struct drm_sigdata {
 488         int context;
 489         struct drm_hw_lock *lock;
 490 };
 491
 492
 493 /*
 494  * Generic memory manager structs
 495  */
 496
 497 struct drm_mm_node {
 498         struct list_head fl_entry;
 499         struct list_head ml_entry;
 500         int free;
 501         unsigned long start;
 502         unsigned long size;
 503         struct drm_mm *mm;
 504         void *private;
 505 };
 506
 507 struct drm_mm {
 508         struct list_head fl_entry;
 509         struct list_head ml_entry;
 510 };
 511
 512
 513 /**
 514  * Mappings list
 515  */
 516 struct drm_map_list {
 517         struct list_head head;          /**< list head */
 518         struct drm_hash_item hash;
 519         struct drm_map *map;                    /**< mapping */
 520         uint64_t user_token;
 521 };
 522
 523 typedef struct drm_map drm_local_map_t;
 524
 525 /**
 526  * Context handle list
 527  */
 528 struct drm_ctx_list {
 529         struct list_head head;          /**< list head */
 530         drm_context_t handle;           /**< context handle */
 531         struct drm_file *tag;           /**< associated fd private data */
 532 };
 533
 534 struct drm_vbl_sig {
 535         struct list_head head;
 536         unsigned int sequence;
 537         struct siginfo info;
 538         struct task_struct *task;
 539 };
 540
 541 /* location of GART table */
 542 #define DRM_ATI_GART_MAIN 1
 543 #define DRM_ATI_GART_FB   2
 544
 545 #define DRM_ATI_GART_PCI 1
 546 #define DRM_ATI_GART_PCIE 2
 547 #define DRM_ATI_GART_IGP 3
 548
 549 struct drm_ati_pcigart_info {
 550         int gart_table_location;
 551         int gart_reg_if;
 552         void *addr;
 553         dma_addr_t bus_addr;
 554         drm_local_map_t mapping;
 555         int table_size;
 556 };
 557
 558 /**
 559  * DRM driver structure. This structure represent the common code for
 560  * a family of cards. There will one drm_device for each card present
 561  * in this family
 562  */
 563 struct drm_driver {
 564         int (*load) (struct drm_device *, unsigned long flags);
 565         int (*firstopen) (struct drm_device *);
 566         int (*open) (struct drm_device *, struct drm_file *);
 567         void (*preclose) (struct drm_device *, struct drm_file *file_priv);
 568         void (*postclose) (struct drm_device *, struct drm_file *);
 569         void (*lastclose) (struct drm_device *);
 570         int (*unload) (struct drm_device *);
 571         int (*suspend) (struct drm_device *, pm_message_t state);
 572         int (*resume) (struct drm_device *);
 573         int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
 574         void (*dma_ready) (struct drm_device *);
 575         int (*dma_quiescent) (struct drm_device *);
 576         int (*context_ctor) (struct drm_device *dev, int context);
 577         int (*context_dtor) (struct drm_device *dev, int context);
 578         int (*kernel_context_switch) (struct drm_device *dev, int old,
 579                                       int new);
 580         void (*kernel_context_switch_unlock) (struct drm_device *dev);
 581         int (*vblank_wait) (struct drm_device *dev, unsigned int *sequence);
 582         int (*vblank_wait2) (struct drm_device *dev, unsigned int *sequence);
 583         int (*dri_library_name) (struct drm_device *dev, char *buf);
 584
 585         /**
 586          * Called by \c drm_device_is_agp.  Typically used to determine if a
 587          * card is really attached to AGP or not.
 588          *
 589          * \param dev  DRM device handle
 590          *
 591          * \returns
 592          * One of three values is returned depending on whether or not the
 593          * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
 594          * (return of 1), or may or may not be AGP (return of 2).
 595          */
 596         int (*device_is_agp) (struct drm_device *dev);
 597
 598         /* these have to be filled in */
 599
 600         irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
 601         void (*irq_preinstall) (struct drm_device *dev);
 602         void (*irq_postinstall) (struct drm_device *dev);
 603         void (*irq_uninstall) (struct drm_device *dev);
 604         void (*reclaim_buffers) (struct drm_device *dev,
 605                                  struct drm_file * file_priv);
 606         void (*reclaim_buffers_locked) (struct drm_device *dev,
 607                                         struct drm_file *file_priv);
 608         void (*reclaim_buffers_idlelocked) (struct drm_device *dev,
 609                                             struct drm_file *file_priv);
 610         unsigned long (*get_map_ofs) (struct drm_map * map);
 611         unsigned long (*get_reg_ofs) (struct drm_device *dev);
 612         void (*set_version) (struct drm_device *dev,
 613                              struct drm_set_version *sv);
 614
 615         int major;
 616         int minor;
 617         int patchlevel;
 618         char *name;
 619         char *desc;
 620         char *date;
 621
 622         u32 driver_features;
 623         int dev_priv_size;
 624         struct drm_ioctl_desc *ioctls;
 625         int num_ioctls;
 626         struct file_operations fops;
 627         struct pci_driver pci_driver;
 628 };
 629
 630 /**
 631  * DRM head structure. This structure represent a video head on a card
 632  * that may contain multiple heads. Embed one per head of these in the
 633  * private drm_device structure.
 634  */
 635 struct drm_head {
 636         int minor;                      /**< Minor device number */
 637         struct drm_device *dev;
 638         struct proc_dir_entry *dev_root;  /**< proc directory entry */
 639         dev_t device;                   /**< Device number for mknod */
 640         struct class_device *dev_class;
 641 };
 642
 643 /**
 644  * DRM device structure. This structure represent a complete card that
 645  * may contain multiple heads.
 646  */
 647 struct drm_device {
 648         struct device dev;              /**< Linux device */
 649         char *unique;                   /**< Unique identifier: e.g., busid */
 650         int unique_len;                 /**< Length of unique field */
 651         char *devname;                  /**< For /proc/interrupts */
 652         int if_version;                 /**< Highest interface version set */
 653
 654         int blocked;                    /**< Blocked due to VC switch? */
 655
 656         /** \name Locks */
 657         /*@{ */
 658         spinlock_t count_lock;          /**< For inuse, drm_device::open_count, drm_device::buf_use */
 659         struct mutex struct_mutex;      /**< For others */
 660         /*@} */
 661
 662         /** \name Usage Counters */
 663         /*@{ */
 664         int open_count;                 /**< Outstanding files open */
 665         atomic_t ioctl_count;           /**< Outstanding IOCTLs pending */
 666         atomic_t vma_count;             /**< Outstanding vma areas open */
 667         int buf_use;                    /**< Buffers in use -- cannot alloc */
 668         atomic_t buf_alloc;             /**< Buffer allocation in progress */
 669         /*@} */
 670
 671         /** \name Performance counters */
 672         /*@{ */
 673         unsigned long counters;
 674         enum drm_stat_type types[15];
 675         atomic_t counts[15];
 676         /*@} */
 677
 678         /** \name Authentication */
 679         /*@{ */
 680         struct list_head filelist;
 681         struct drm_open_hash magiclist; /**< magic hash table */
 682         struct list_head magicfree;
 683         /*@} */
 684
 685         /** \name Memory management */
 686         /*@{ */
 687         struct list_head maplist;       /**< Linked list of regions */
 688         int map_count;                  /**< Number of mappable regions */
 689         struct drm_open_hash map_hash;  /**< User token hash table for maps */
 690
 691         /** \name Context handle management */
 692         /*@{ */
 693         struct list_head ctxlist;       /**< Linked list of context handles */
 694         int ctx_count;                  /**< Number of context handles */
 695         struct mutex ctxlist_mutex;     /**< For ctxlist */
 696
 697         struct idr ctx_idr;
 698
 699         struct list_head vmalist;       /**< List of vmas (for debugging) */
 700         struct drm_lock_data lock;      /**< Information on hardware lock */
 701         /*@} */
 702
 703         /** \name DMA queues (contexts) */
 704         /*@{ */
 705         int queue_count;                /**< Number of active DMA queues */
 706         int queue_reserved;               /**< Number of reserved DMA queues */
 707         int queue_slots;                /**< Actual length of queuelist */
 708         struct drm_queue **queuelist;   /**< Vector of pointers to DMA queues */
 709         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
 710         /*@} */
 711
 712         /** \name Context support */
 713         /*@{ */
 714         int irq;                        /**< Interrupt used by board */
 715         int irq_enabled;                /**< True if irq handler is enabled */
 716         __volatile__ long context_flag; /**< Context swapping flag */
 717         __volatile__ long interrupt_flag; /**< Interruption handler flag */
 718         __volatile__ long dma_flag;     /**< DMA dispatch flag */
 719         struct timer_list timer;        /**< Timer for delaying ctx switch */
 720         wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
 721         int last_checked;               /**< Last context checked for DMA */
 722         int last_context;               /**< Last current context */
 723         unsigned long last_switch;      /**< jiffies at last context switch */
 724         /*@} */
 725
 726         struct work_struct work;
 727         /** \name VBLANK IRQ support */
 728         /*@{ */
 729
 730         wait_queue_head_t vbl_queue;    /**< VBLANK wait queue */
 731         atomic_t vbl_received;
 732         atomic_t vbl_received2;         /**< number of secondary VBLANK interrupts */
 733         spinlock_t vbl_lock;
 734         struct list_head vbl_sigs;              /**< signal list to send on VBLANK */
 735         struct list_head vbl_sigs2;     /**< signals to send on secondary VBLANK */
 736         unsigned int vbl_pending;
 737         spinlock_t tasklet_lock;        /**< For drm_locked_tasklet */
 738         void (*locked_tasklet_func)(struct drm_device *dev);
 739
 740         /*@} */
 741         cycles_t ctx_start;
 742         cycles_t lck_start;
 743
 744         struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */
 745         wait_queue_head_t buf_readers;  /**< Processes waiting to read */
 746         wait_queue_head_t buf_writers;  /**< Processes waiting to ctx switch */
 747
 748         struct drm_agp_head *agp;       /**< AGP data */
 749
 750         struct pci_dev *pdev;           /**< PCI device structure */
 751         int pci_vendor;                 /**< PCI vendor id */
 752         int pci_device;                 /**< PCI device id */
 753 #ifdef __alpha__
 754         struct pci_controller *hose;
 755 #endif
 756         struct drm_sg_mem *sg;  /**< Scatter gather memory */
 757         void *dev_private;              /**< device private data */
 758         struct drm_sigdata sigdata;        /**< For block_all_signals */
 759         sigset_t sigmask;
 760
 761         struct drm_driver *driver;
 762         drm_local_map_t *agp_buffer_map;
 763         unsigned int agp_buffer_token;
 764         struct drm_head primary;                /**< primary screen head */
 765
 766         /** \name Drawable information */
 767         /*@{ */
 768         spinlock_t drw_lock;
 769         struct idr drw_idr;
 770         /*@} */
 771 };
 772
 773 static __inline__ int drm_core_check_feature(struct drm_device *dev,
 774                                              int feature)
 775 {
 776         return ((dev->driver->driver_features & feature) ? 1 : 0);
 777 }
 778
 779 #ifdef __alpha__
 780 #define drm_get_pci_domain(dev) dev->hose->index
 781 #else
 782 #define drm_get_pci_domain(dev) 0
 783 #endif
 784
 785 #if __OS_HAS_AGP
 786 static inline int drm_core_has_AGP(struct drm_device *dev)
 787 {
 788         return drm_core_check_feature(dev, DRIVER_USE_AGP);
 789 }
 790 #else
 791 #define drm_core_has_AGP(dev) (0)
 792 #endif
 793
 794 #if __OS_HAS_MTRR
 795 static inline int drm_core_has_MTRR(struct drm_device *dev)
 796 {
 797         return drm_core_check_feature(dev, DRIVER_USE_MTRR);
 798 }
 799
 800 #define DRM_MTRR_WC             MTRR_TYPE_WRCOMB
 801
 802 static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
 803                                unsigned int flags)
 804 {
 805         return mtrr_add(offset, size, flags, 1);
 806 }
 807
 808 static inline int drm_mtrr_del(int handle, unsigned long offset,
 809                                unsigned long size, unsigned int flags)
 810 {
 811         return mtrr_del(handle, offset, size);
 812 }
 813
 814 #else
 815 #define drm_core_has_MTRR(dev) (0)
 816
 817 #define DRM_MTRR_WC             0
 818
 819 static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
 820                                unsigned int flags)
 821 {
 822         return 0;
 823 }
 824
 825 static inline int drm_mtrr_del(int handle, unsigned long offset,
 826                                unsigned long size, unsigned int flags)
 827 {
 828         return 0;
 829 }
 830 #endif
 831
 832 /******************************************************************/
 833 /** \name Internal function definitions */
 834 /*@{*/
 835
 836                                 /* Driver support (drm_drv.h) */
 837 extern int drm_init(struct drm_driver *driver);
 838 extern void drm_exit(struct drm_driver *driver);
 839 extern int drm_ioctl(struct inode *inode, struct file *filp,
 840                      unsigned int cmd, unsigned long arg);
 841 extern long drm_compat_ioctl(struct file *filp,
 842                              unsigned int cmd, unsigned long arg);
 843 extern int drm_lastclose(struct drm_device *dev);
 844
 845                                 /* Device support (drm_fops.h) */
 846 extern int drm_open(struct inode *inode, struct file *filp);
 847 extern int drm_stub_open(struct inode *inode, struct file *filp);
 848 extern int drm_fasync(int fd, struct file *filp, int on);
 849 extern int drm_release(struct inode *inode, struct file *filp);
 850
 851                                 /* Mapping support (drm_vm.h) */
 852 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
 853 extern unsigned long drm_core_get_map_ofs(struct drm_map * map);
 854 extern unsigned long drm_core_get_reg_ofs(struct drm_device *dev);
 855 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
 856
 857                                 /* Memory management support (drm_memory.h) */
 858 #include "drm_memory.h"
 859 extern void drm_mem_init(void);
 860 extern int drm_mem_info(char *buf, char **start, off_t offset,
 861                         int request, int *eof, void *data);
 862 extern void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area);
 863
 864 extern DRM_AGP_MEM *drm_alloc_agp(struct drm_device *dev, int pages, u32 type);
 865 extern int drm_free_agp(DRM_AGP_MEM * handle, int pages);
 866 extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
 867 extern int drm_unbind_agp(DRM_AGP_MEM * handle);
 868
 869                                 /* Misc. IOCTL support (drm_ioctl.h) */
 870 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
 871                             struct drm_file *file_priv);
 872 extern int drm_getunique(struct drm_device *dev, void *data,
 873                          struct drm_file *file_priv);
 874 extern int drm_setunique(struct drm_device *dev, void *data,
 875                          struct drm_file *file_priv);
 876 extern int drm_getmap(struct drm_device *dev, void *data,
 877                       struct drm_file *file_priv);
 878 extern int drm_getclient(struct drm_device *dev, void *data,
 879                          struct drm_file *file_priv);
 880 extern int drm_getstats(struct drm_device *dev, void *data,
 881                         struct drm_file *file_priv);
 882 extern int drm_setversion(struct drm_device *dev, void *data,
 883                           struct drm_file *file_priv);
 884 extern int drm_noop(struct drm_device *dev, void *data,
 885                     struct drm_file *file_priv);
 886
 887                                 /* Context IOCTL support (drm_context.h) */
 888 extern int drm_resctx(struct drm_device *dev, void *data,
 889                       struct drm_file *file_priv);
 890 extern int drm_addctx(struct drm_device *dev, void *data,
 891                       struct drm_file *file_priv);
 892 extern int drm_modctx(struct drm_device *dev, void *data,
 893                       struct drm_file *file_priv);
 894 extern int drm_getctx(struct drm_device *dev, void *data,
 895                       struct drm_file *file_priv);
 896 extern int drm_switchctx(struct drm_device *dev, void *data,
 897                          struct drm_file *file_priv);
 898 extern int drm_newctx(struct drm_device *dev, void *data,
 899                       struct drm_file *file_priv);
 900 extern int drm_rmctx(struct drm_device *dev, void *data,
 901                      struct drm_file *file_priv);
 902
 903 extern int drm_ctxbitmap_init(struct drm_device *dev);
 904 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
 905 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
 906
 907 extern int drm_setsareactx(struct drm_device *dev, void *data,
 908                            struct drm_file *file_priv);
 909 extern int drm_getsareactx(struct drm_device *dev, void *data,
 910                            struct drm_file *file_priv);
 911
 912                                 /* Drawable IOCTL support (drm_drawable.h) */
 913 extern int drm_adddraw(struct drm_device *dev, void *data,
 914                        struct drm_file *file_priv);
 915 extern int drm_rmdraw(struct drm_device *dev, void *data,
 916                       struct drm_file *file_priv);
 917 extern int drm_update_drawable_info(struct drm_device *dev, void *data,
 918                                     struct drm_file *file_priv);
 919 extern struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev,
 920                                                   drm_drawable_t id);
 921 extern void drm_drawable_free_all(struct drm_device *dev);
 922
 923                                 /* Authentication IOCTL support (drm_auth.h) */
 924 extern int drm_getmagic(struct drm_device *dev, void *data,
 925                         struct drm_file *file_priv);
 926 extern int drm_authmagic(struct drm_device *dev, void *data,
 927                          struct drm_file *file_priv);
 928
 929                                 /* Locking IOCTL support (drm_lock.h) */
 930 extern int drm_lock(struct drm_device *dev, void *data,
 931                     struct drm_file *file_priv);
 932 extern int drm_unlock(struct drm_device *dev, void *data,
 933                       struct drm_file *file_priv);
 934 extern int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context);
 935 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
 936 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
 937 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
 938
 939 /*
 940  * These are exported to drivers so that they can implement fencing using
 941  * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
 942  */
 943
 944 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
 945
 946                                 /* Buffer management support (drm_bufs.h) */
 947 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
 948 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
 949 extern int drm_addmap(struct drm_device *dev, unsigned int offset,
 950                       unsigned int size, enum drm_map_type type,
 951                       enum drm_map_flags flags, drm_local_map_t ** map_ptr);
 952 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
 953                             struct drm_file *file_priv);
 954 extern int drm_rmmap(struct drm_device *dev, drm_local_map_t *map);
 955 extern int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map);
 956 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
 957                            struct drm_file *file_priv);
 958 extern int drm_addbufs(struct drm_device *dev, void *data,
 959                        struct drm_file *file_priv);
 960 extern int drm_infobufs(struct drm_device *dev, void *data,
 961                         struct drm_file *file_priv);
 962 extern int drm_markbufs(struct drm_device *dev, void *data,
 963                         struct drm_file *file_priv);
 964 extern int drm_freebufs(struct drm_device *dev, void *data,
 965                         struct drm_file *file_priv);
 966 extern int drm_mapbufs(struct drm_device *dev, void *data,
 967                        struct drm_file *file_priv);
 968 extern int drm_order(unsigned long size);
 969 extern unsigned long drm_get_resource_start(struct drm_device *dev,
 970                                             unsigned int resource);
 971 extern unsigned long drm_get_resource_len(struct drm_device *dev,
 972                                           unsigned int resource);
 973
 974                                 /* DMA support (drm_dma.h) */
 975 extern int drm_dma_setup(struct drm_device *dev);
 976 extern void drm_dma_takedown(struct drm_device *dev);
 977 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
 978 extern void drm_core_reclaim_buffers(struct drm_device *dev,
 979                                      struct drm_file *filp);
 980
 981                                 /* IRQ support (drm_irq.h) */
 982 extern int drm_control(struct drm_device *dev, void *data,
 983                        struct drm_file *file_priv);
 984 extern irqreturn_t drm_irq_handler(DRM_IRQ_ARGS);
 985 extern int drm_irq_uninstall(struct drm_device *dev);
 986 extern void drm_driver_irq_preinstall(struct drm_device *dev);
 987 extern void drm_driver_irq_postinstall(struct drm_device *dev);
 988 extern void drm_driver_irq_uninstall(struct drm_device *dev);
 989
 990 extern int drm_wait_vblank(struct drm_device *dev, void *data,
 991                            struct drm_file *file_priv);
 992 extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
 993 extern void drm_vbl_send_signals(struct drm_device *dev);
 994 extern void drm_locked_tasklet(struct drm_device *dev, void(*func)(struct drm_device*));
 995
 996                                 /* AGP/GART support (drm_agpsupport.h) */
 997 extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
 998 extern int drm_agp_acquire(struct drm_device *dev);
 999 extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
1000                                  struct drm_file *file_priv);
1001 extern int drm_agp_release(struct drm_device *dev);
1002 extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
1003                                  struct drm_file *file_priv);
1004 extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1005 extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
1006                                 struct drm_file *file_priv);
1007 extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
1008 extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
1009                         struct drm_file *file_priv);
1010 extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1011 extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
1012                          struct drm_file *file_priv);
1013 extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1014 extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
1015                         struct drm_file *file_priv);
1016 extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1017 extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
1018                           struct drm_file *file_priv);
1019 extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1020 extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
1021                         struct drm_file *file_priv);
1022 extern DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size_t pages, u32 type);
1023 extern int drm_agp_free_memory(DRM_AGP_MEM * handle);
1024 extern int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start);
1025 extern int drm_agp_unbind_memory(DRM_AGP_MEM * handle);
1026
1027                                 /* Stub support (drm_stub.h) */
1028 extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
1029                        struct drm_driver *driver);
1030 extern int drm_put_dev(struct drm_device *dev);
1031 extern int drm_put_head(struct drm_head *head);
1032 extern unsigned int drm_debug;
1033 extern unsigned int drm_cards_limit;
1034 extern struct drm_head **drm_heads;
1035 extern struct class *drm_class;
1036 extern struct proc_dir_entry *drm_proc_root;
1037
1038 extern drm_local_map_t *drm_getsarea(struct drm_device *dev);
1039
1040                                 /* Proc support (drm_proc.h) */
1041 extern int drm_proc_init(struct drm_device *dev,
1042                          int minor,
1043                          struct proc_dir_entry *root,
1044                          struct proc_dir_entry **dev_root);
1045 extern int drm_proc_cleanup(int minor,
1046                             struct proc_dir_entry *root,
1047                             struct proc_dir_entry *dev_root);
1048
1049                                 /* Scatter Gather Support (drm_scatter.h) */
1050 extern void drm_sg_cleanup(struct drm_sg_mem * entry);
1051 extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1052                         struct drm_file *file_priv);
1053 extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
1054 extern int drm_sg_free(struct drm_device *dev, void *data,
1055                        struct drm_file *file_priv);
1056
1057                                /* ATI PCIGART support (ati_pcigart.h) */
1058 extern int drm_ati_pcigart_init(struct drm_device *dev,
1059                                 struct drm_ati_pcigart_info * gart_info);
1060 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1061                                    struct drm_ati_pcigart_info * gart_info);
1062
1063 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1064                                        size_t align, dma_addr_t maxaddr);
1065 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1066 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1067
1068                                /* sysfs support (drm_sysfs.c) */
1069 struct drm_sysfs_class;
1070 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1071 extern void drm_sysfs_destroy(void);
1072 extern int drm_sysfs_device_add(struct drm_device *dev, struct drm_head *head);
1073 extern void drm_sysfs_device_remove(struct drm_device *dev);
1074
1075 /*
1076  * Basic memory manager support (drm_mm.c)
1077  */
1078 extern struct drm_mm_node *drm_mm_get_block(struct drm_mm_node * parent,
1079                                        unsigned long size,
1080                                        unsigned alignment);
1081 extern void drm_mm_put_block(struct drm_mm_node * cur);
1082 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, unsigned long size,
1083                                          unsigned alignment, int best_match);
1084 extern int drm_mm_init(struct drm_mm *mm, unsigned long start, unsigned long size);
1085 extern void drm_mm_takedown(struct drm_mm *mm);
1086 extern int drm_mm_clean(struct drm_mm *mm);
1087 extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
1088 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, unsigned long size);
1089 extern int drm_mm_add_space_to_tail(struct drm_mm *mm, unsigned long size);
1090
1091 extern void drm_core_ioremap(struct drm_map *map, struct drm_device *dev);
1092 extern void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev);
1093
1094 static __inline__ struct drm_map *drm_core_findmap(struct drm_device *dev,
1095                                                    unsigned int token)
1096 {
1097         struct drm_map_list *_entry;
1098         list_for_each_entry(_entry, &dev->maplist, head)
1099             if (_entry->user_token == token)
1100                 return _entry->map;
1101         return NULL;
1102 }
1103
1104 static __inline__ int drm_device_is_agp(struct drm_device *dev)
1105 {
1106         if (dev->driver->device_is_agp != NULL) {
1107                 int err = (*dev->driver->device_is_agp) (dev);
1108
1109                 if (err != 2) {
1110                         return err;
1111                 }
1112         }
1113
1114         return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1115 }
1116
1117 static __inline__ int drm_device_is_pcie(struct drm_device *dev)
1118 {
1119         return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
1120 }
1121
1122 static __inline__ void drm_core_dropmap(struct drm_map *map)
1123 {
1124 }
1125
1126 #ifndef DEBUG_MEMORY
1127 /** Wrapper around kmalloc() */
1128 static __inline__ void *drm_alloc(size_t size, int area)
1129 {
1130         return kmalloc(size, GFP_KERNEL);
1131 }
1132
1133 /** Wrapper around kfree() */
1134 static __inline__ void drm_free(void *pt, size_t size, int area)
1135 {
1136         kfree(pt);
1137 }
1138
1139 /** Wrapper around kcalloc() */
1140 static __inline__ void *drm_calloc(size_t nmemb, size_t size, int area)
1141 {
1142         return kcalloc(nmemb, size, GFP_KERNEL);
1143 }
1144 #else
1145 extern void *drm_alloc(size_t size, int area);
1146 extern void drm_free(void *pt, size_t size, int area);
1147 extern void *drm_calloc(size_t nmemb, size_t size, int area);
1148 #endif
1149
1150 /*@}*/
1151
1152 #endif                          /* __KERNEL__ */
1153 #endif