include/drm/drmP.h

   1 /*
   2  * Internal Header for the Direct Rendering Manager
   3  *
   4  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * Copyright (c) 2009-2010, Code Aurora Forum.
   7  * All rights reserved.
   8  *
   9  * Author: Rickard E. (Rik) Faith <faith@valinux.com>
  10  * Author: Gareth Hughes <gareth@valinux.com>
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice (including the next
  20  * paragraph) shall be included in all copies or substantial portions of the
  21  * Software.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  24  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  26  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  27  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  28  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  29  * OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32 #ifndef _DRM_P_H_
  33 #define _DRM_P_H_
  34
  35 #include <linux/agp_backend.h>
  36 #include <linux/cdev.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/file.h>
  39 #include <linux/fs.h>
  40 #include <linux/highmem.h>
  41 #include <linux/idr.h>
  42 #include <linux/init.h>
  43 #include <linux/io.h>
  44 #include <linux/jiffies.h>
  45 #include <linux/kernel.h>
  46 #include <linux/kref.h>
  47 #include <linux/miscdevice.h>
  48 #include <linux/mm.h>
  49 #include <linux/mutex.h>
  50 #include <linux/pci.h>
  51 #include <linux/platform_device.h>
  52 #include <linux/poll.h>
  53 #include <linux/ratelimit.h>
  54 #include <linux/rbtree.h>
  55 #include <linux/sched.h>
  56 #include <linux/slab.h>
  57 #include <linux/types.h>
  58 #include <linux/vmalloc.h>
  59 #include <linux/workqueue.h>
  60 #include <linux/dma-fence.h>
  61
  62 #include <asm/mman.h>
  63 #include <asm/pgalloc.h>
  64 #include <linux/uaccess.h>
  65
  66 #include <uapi/drm/drm.h>
  67 #include <uapi/drm/drm_mode.h>
  68
  69 #include <drm/drm_agpsupport.h>
  70 #include <drm/drm_crtc.h>
  71 #include <drm/drm_fourcc.h>
  72 #include <drm/drm_global.h>
  73 #include <drm/drm_hashtab.h>
  74 #include <drm/drm_mem_util.h>
  75 #include <drm/drm_mm.h>
  76 #include <drm/drm_os_linux.h>
  77 #include <drm/drm_sarea.h>
  78 #include <drm/drm_vma_manager.h>
  79 #include <drm/drm_drv.h>
  80
  81 struct module;
  82
  83 struct drm_file;
  84 struct drm_device;
  85 struct drm_agp_head;
  86 struct drm_local_map;
  87 struct drm_device_dma;
  88 struct drm_dma_handle;
  89 struct drm_gem_object;
  90 struct drm_master;
  91 struct drm_vblank_crtc;
  92
  93 struct device_node;
  94 struct videomode;
  95 struct reservation_object;
  96 struct dma_buf_attachment;
  97
  98 /*
  99  * The following categories are defined:
 100  *
 101  * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
 102  *       This is the category used by the DRM_DEBUG() macro.
 103  *
 104  * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
 105  *         This is the category used by the DRM_DEBUG_DRIVER() macro.
 106  *
 107  * KMS: used in the modesetting code.
 108  *      This is the category used by the DRM_DEBUG_KMS() macro.
 109  *
 110  * PRIME: used in the prime code.
 111  *        This is the category used by the DRM_DEBUG_PRIME() macro.
 112  *
 113  * ATOMIC: used in the atomic code.
 114  *        This is the category used by the DRM_DEBUG_ATOMIC() macro.
 115  *
 116  * VBL: used for verbose debug message in the vblank code
 117  *        This is the category used by the DRM_DEBUG_VBL() macro.
 118  *
 119  * Enabling verbose debug messages is done through the drm.debug parameter,
 120  * each category being enabled by a bit.
 121  *
 122  * drm.debug=0x1 will enable CORE messages
 123  * drm.debug=0x2 will enable DRIVER messages
 124  * drm.debug=0x3 will enable CORE and DRIVER messages
 125  * ...
 126  * drm.debug=0x3f will enable all messages
 127  *
 128  * An interesting feature is that it's possible to enable verbose logging at
 129  * run-time by echoing the debug value in its sysfs node:
 130  *   # echo 0xf > /sys/module/drm/parameters/debug
 131  */
 132 #define DRM_UT_NONE             0x00
 133 #define DRM_UT_CORE             0x01
 134 #define DRM_UT_DRIVER           0x02
 135 #define DRM_UT_KMS              0x04
 136 #define DRM_UT_PRIME            0x08
 137 #define DRM_UT_ATOMIC           0x10
 138 #define DRM_UT_VBL              0x20
 139 #define DRM_UT_STATE            0x40
 140
 141 /***********************************************************************/
 142 /** \name DRM template customization defaults */
 143 /*@{*/
 144
 145 /***********************************************************************/
 146 /** \name Macros to make printk easier */
 147 /*@{*/
 148
 149 #define _DRM_PRINTK(once, level, fmt, ...)                              \
 150         do {                                                            \
 151                 printk##once(KERN_##level "[" DRM_NAME "] " fmt,        \
 152                              ##__VA_ARGS__);                            \
 153         } while (0)
 154
 155 #define DRM_INFO(fmt, ...)                                              \
 156         _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
 157 #define DRM_NOTE(fmt, ...)                                              \
 158         _DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
 159 #define DRM_WARN(fmt, ...)                                              \
 160         _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
 161
 162 #define DRM_INFO_ONCE(fmt, ...)                                         \
 163         _DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
 164 #define DRM_NOTE_ONCE(fmt, ...)                                         \
 165         _DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
 166 #define DRM_WARN_ONCE(fmt, ...)                                         \
 167         _DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
 168
 169 /**
 170  * Error output.
 171  *
 172  * \param fmt printf() like format string.
 173  * \param arg arguments
 174  */
 175 #define DRM_DEV_ERROR(dev, fmt, ...)                                    \
 176         drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
 177                        fmt, ##__VA_ARGS__)
 178 #define DRM_ERROR(fmt, ...)                                             \
 179         drm_printk(KERN_ERR, DRM_UT_NONE, fmt,  ##__VA_ARGS__)
 180
 181 /**
 182  * Rate limited error output.  Like DRM_ERROR() but won't flood the log.
 183  *
 184  * \param fmt printf() like format string.
 185  * \param arg arguments
 186  */
 187 #define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...)                        \
 188 ({                                                                      \
 189         static DEFINE_RATELIMIT_STATE(_rs,                              \
 190                                       DEFAULT_RATELIMIT_INTERVAL,       \
 191                                       DEFAULT_RATELIMIT_BURST);         \
 192                                                                         \
 193         if (__ratelimit(&_rs))                                          \
 194                 DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__);                 \
 195 })
 196 #define DRM_ERROR_RATELIMITED(fmt, ...)                                 \
 197         DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
 198
 199 #define DRM_DEV_INFO(dev, fmt, ...)                                     \
 200         drm_dev_printk(dev, KERN_INFO, DRM_UT_NONE, __func__, "", fmt,  \
 201                        ##__VA_ARGS__)
 202
 203 #define DRM_DEV_INFO_ONCE(dev, fmt, ...)                                \
 204 ({                                                                      \
 205         static bool __print_once __read_mostly;                         \
 206         if (!__print_once) {                                            \
 207                 __print_once = true;                                    \
 208                 DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__);                  \
 209         }                                                               \
 210 })
 211
 212 /**
 213  * Debug output.
 214  *
 215  * \param fmt printf() like format string.
 216  * \param arg arguments
 217  */
 218 #define DRM_DEV_DEBUG(dev, fmt, args...)                                \
 219         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, \
 220                        ##args)
 221 #define DRM_DEBUG(fmt, ...)                                             \
 222         drm_printk(KERN_DEBUG, DRM_UT_CORE, fmt, ##__VA_ARGS__)
 223
 224 #define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...)                         \
 225         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "",    \
 226                        fmt, ##args)
 227 #define DRM_DEBUG_DRIVER(fmt, ...)                                      \
 228         drm_printk(KERN_DEBUG, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
 229
 230 #define DRM_DEV_DEBUG_KMS(dev, fmt, args...)                            \
 231         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt,  \
 232                        ##args)
 233 #define DRM_DEBUG_KMS(fmt, ...)                                 \
 234         drm_printk(KERN_DEBUG, DRM_UT_KMS, fmt, ##__VA_ARGS__)
 235
 236 #define DRM_DEV_DEBUG_PRIME(dev, fmt, args...)                          \
 237         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "",     \
 238                        fmt, ##args)
 239 #define DRM_DEBUG_PRIME(fmt, ...)                                       \
 240         drm_printk(KERN_DEBUG, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
 241
 242 #define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...)                         \
 243         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "",    \
 244                        fmt, ##args)
 245 #define DRM_DEBUG_ATOMIC(fmt, ...)                                      \
 246         drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
 247
 248 #define DRM_DEV_DEBUG_VBL(dev, fmt, args...)                            \
 249         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt,  \
 250                        ##args)
 251 #define DRM_DEBUG_VBL(fmt, ...)                                 \
 252         drm_printk(KERN_DEBUG, DRM_UT_VBL, fmt, ##__VA_ARGS__)
 253
 254 #define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...)     \
 255 ({                                                                      \
 256         static DEFINE_RATELIMIT_STATE(_rs,                              \
 257                                       DEFAULT_RATELIMIT_INTERVAL,       \
 258                                       DEFAULT_RATELIMIT_BURST);         \
 259         if (__ratelimit(&_rs))                                          \
 260                 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ ## level,       \
 261                                __func__, "", fmt, ##args);              \
 262 })
 263
 264 /**
 265  * Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
 266  *
 267  * \param fmt printf() like format string.
 268  * \param arg arguments
 269  */
 270 #define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, args...)                    \
 271         DEV__DRM_DEFINE_DEBUG_RATELIMITED(dev, CORE, fmt, ##args)
 272 #define DRM_DEBUG_RATELIMITED(fmt, args...)                             \
 273         DRM_DEV_DEBUG_RATELIMITED(NULL, fmt, ##args)
 274 #define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, args...)             \
 275         _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRIVER, fmt, ##args)
 276 #define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...)                      \
 277         DRM_DEV_DEBUG_DRIVER_RATELIMITED(NULL, fmt, ##args)
 278 #define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, args...)                \
 279         _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, KMS, fmt, ##args)
 280 #define DRM_DEBUG_KMS_RATELIMITED(fmt, args...)                         \
 281         DRM_DEV_DEBUG_KMS_RATELIMITED(NULL, fmt, ##args)
 282 #define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, args...)              \
 283         _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, PRIME, fmt, ##args)
 284 #define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...)                       \
 285         DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##args)
 286
 287 /* Format strings and argument splitters to simplify printing
 288  * various "complex" objects
 289  */
 290 #define DRM_MODE_FMT    "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
 291 #define DRM_MODE_ARG(m) \
 292         (m)->base.id, (m)->name, (m)->vrefresh, (m)->clock, \
 293         (m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
 294         (m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
 295         (m)->type, (m)->flags
 296
 297 #define DRM_RECT_FMT    "%dx%d%+d%+d"
 298 #define DRM_RECT_ARG(r) drm_rect_width(r), drm_rect_height(r), (r)->x1, (r)->y1
 299
 300 /* for rect's in fixed-point format: */
 301 #define DRM_RECT_FP_FMT "%d.%06ux%d.%06u%+d.%06u%+d.%06u"
 302 #define DRM_RECT_FP_ARG(r) \
 303                 drm_rect_width(r) >> 16, ((drm_rect_width(r) & 0xffff) * 15625) >> 10, \
 304                 drm_rect_height(r) >> 16, ((drm_rect_height(r) & 0xffff) * 15625) >> 10, \
 305                 (r)->x1 >> 16, (((r)->x1 & 0xffff) * 15625) >> 10, \
 306                 (r)->y1 >> 16, (((r)->y1 & 0xffff) * 15625) >> 10
 307
 308 /*@}*/
 309
 310 /***********************************************************************/
 311 /** \name Internal types and structures */
 312 /*@{*/
 313
 314 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 315
 316 /**
 317  * Ioctl function type.
 318  *
 319  * \param inode device inode.
 320  * \param file_priv DRM file private pointer.
 321  * \param cmd command.
 322  * \param arg argument.
 323  */
 324 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
 325                         struct drm_file *file_priv);
 326
 327 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
 328                                unsigned long arg);
 329
 330 #define DRM_IOCTL_NR(n)                _IOC_NR(n)
 331 #define DRM_MAJOR       226
 332
 333 #define DRM_AUTH        0x1
 334 #define DRM_MASTER      0x2
 335 #define DRM_ROOT_ONLY   0x4
 336 #define DRM_CONTROL_ALLOW 0x8
 337 #define DRM_UNLOCKED    0x10
 338 #define DRM_RENDER_ALLOW 0x20
 339
 340 struct drm_ioctl_desc {
 341         unsigned int cmd;
 342         int flags;
 343         drm_ioctl_t *func;
 344         const char *name;
 345 };
 346
 347 /**
 348  * Creates a driver or general drm_ioctl_desc array entry for the given
 349  * ioctl, for use by drm_ioctl().
 350  */
 351
 352 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)                         \
 353         [DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = {        \
 354                 .cmd = DRM_IOCTL_##ioctl,                               \
 355                 .func = _func,                                          \
 356                 .flags = _flags,                                        \
 357                 .name = #ioctl                                          \
 358          }
 359
 360 /* Event queued up for userspace to read */
 361 struct drm_pending_event {
 362         struct completion *completion;
 363         void (*completion_release)(struct completion *completion);
 364         struct drm_event *event;
 365         struct dma_fence *fence;
 366         struct list_head link;
 367         struct list_head pending_link;
 368         struct drm_file *file_priv;
 369         pid_t pid; /* pid of requester, no guarantee it's valid by the time
 370                       we deliver the event, for tracing only */
 371 };
 372
 373 struct drm_prime_file_private {
 374         struct mutex lock;
 375         struct rb_root dmabufs;
 376         struct rb_root handles;
 377 };
 378
 379 /** File private data */
 380 struct drm_file {
 381         unsigned authenticated :1;
 382         /* true when the client has asked us to expose stereo 3D mode flags */
 383         unsigned stereo_allowed :1;
 384         /*
 385          * true if client understands CRTC primary planes and cursor planes
 386          * in the plane list
 387          */
 388         unsigned universal_planes:1;
 389         /* true if client understands atomic properties */
 390         unsigned atomic:1;
 391         /*
 392          * This client is the creator of @master.
 393          * Protected by struct drm_device::master_mutex.
 394          */
 395         unsigned is_master:1;
 396
 397         struct pid *pid;
 398         drm_magic_t magic;
 399         struct list_head lhead;
 400         struct drm_minor *minor;
 401         unsigned long lock_count;
 402
 403         /** Mapping of mm object handles to object pointers. */
 404         struct idr object_idr;
 405         /** Lock for synchronization of access to object_idr. */
 406         spinlock_t table_lock;
 407
 408         struct file *filp;
 409         void *driver_priv;
 410
 411         struct drm_master *master; /* master this node is currently associated with
 412                                       N.B. not always dev->master */
 413         /**
 414          * fbs - List of framebuffers associated with this file.
 415          *
 416          * Protected by fbs_lock. Note that the fbs list holds a reference on
 417          * the fb object to prevent it from untimely disappearing.
 418          */
 419         struct list_head fbs;
 420         struct mutex fbs_lock;
 421
 422         /** User-created blob properties; this retains a reference on the
 423          *  property. */
 424         struct list_head blobs;
 425
 426         wait_queue_head_t event_wait;
 427         struct list_head pending_event_list;
 428         struct list_head event_list;
 429         int event_space;
 430
 431         struct mutex event_read_lock;
 432
 433         struct drm_prime_file_private prime;
 434 };
 435
 436 /**
 437  * Lock data.
 438  */
 439 struct drm_lock_data {
 440         struct drm_hw_lock *hw_lock;    /**< Hardware lock */
 441         /** Private of lock holder's file (NULL=kernel) */
 442         struct drm_file *file_priv;
 443         wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
 444         unsigned long lock_time;        /**< Time of last lock in jiffies */
 445         spinlock_t spinlock;
 446         uint32_t kernel_waiters;
 447         uint32_t user_waiters;
 448         int idle_has_lock;
 449 };
 450
 451 /* Flags and return codes for get_vblank_timestamp() driver function. */
 452 #define DRM_CALLED_FROM_VBLIRQ 1
 453 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
 454 #define DRM_VBLANKTIME_IN_VBLANK         (1 << 1)
 455
 456 /* get_scanout_position() return flags */
 457 #define DRM_SCANOUTPOS_VALID        (1 << 0)
 458 #define DRM_SCANOUTPOS_IN_VBLANK    (1 << 1)
 459 #define DRM_SCANOUTPOS_ACCURATE     (1 << 2)
 460
 461 enum drm_minor_type {
 462         DRM_MINOR_PRIMARY,
 463         DRM_MINOR_CONTROL,
 464         DRM_MINOR_RENDER,
 465         DRM_MINOR_CNT,
 466 };
 467
 468 /**
 469  * Info file list entry. This structure represents a debugfs or proc file to
 470  * be created by the drm core
 471  */
 472 struct drm_info_list {
 473         const char *name; /** file name */
 474         int (*show)(struct seq_file*, void*); /** show callback */
 475         u32 driver_features; /**< Required driver features for this entry */
 476         void *data;
 477 };
 478
 479 /**
 480  * debugfs node structure. This structure represents a debugfs file.
 481  */
 482 struct drm_info_node {
 483         struct list_head list;
 484         struct drm_minor *minor;
 485         const struct drm_info_list *info_ent;
 486         struct dentry *dent;
 487 };
 488
 489 /**
 490  * DRM minor structure. This structure represents a drm minor number.
 491  */
 492 struct drm_minor {
 493         int index;                      /**< Minor device number */
 494         int type;                       /**< Control or render */
 495         struct device *kdev;            /**< Linux device */
 496         struct drm_device *dev;
 497
 498         struct dentry *debugfs_root;
 499
 500         struct list_head debugfs_list;
 501         struct mutex debugfs_lock; /* Protects debugfs_list. */
 502 };
 503
 504 /**
 505  * DRM device structure. This structure represent a complete card that
 506  * may contain multiple heads.
 507  */
 508 struct drm_device {
 509         struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
 510         int if_version;                 /**< Highest interface version set */
 511
 512         /** \name Lifetime Management */
 513         /*@{ */
 514         struct kref ref;                /**< Object ref-count */
 515         struct device *dev;             /**< Device structure of bus-device */
 516         struct drm_driver *driver;      /**< DRM driver managing the device */
 517         void *dev_private;              /**< DRM driver private data */
 518         struct drm_minor *control;              /**< Control node */
 519         struct drm_minor *primary;              /**< Primary node */
 520         struct drm_minor *render;               /**< Render node */
 521         bool registered;
 522
 523         /* currently active master for this device. Protected by master_mutex */
 524         struct drm_master *master;
 525
 526         atomic_t unplugged;                     /**< Flag whether dev is dead */
 527         struct inode *anon_inode;               /**< inode for private address-space */
 528         char *unique;                           /**< unique name of the device */
 529         /*@} */
 530
 531         /** \name Locks */
 532         /*@{ */
 533         struct mutex struct_mutex;      /**< For others */
 534         struct mutex master_mutex;      /**< For drm_minor::master and drm_file::is_master */
 535         /*@} */
 536
 537         /** \name Usage Counters */
 538         /*@{ */
 539         int open_count;                 /**< Outstanding files open, protected by drm_global_mutex. */
 540         spinlock_t buf_lock;            /**< For drm_device::buf_use and a few other things. */
 541         int buf_use;                    /**< Buffers in use -- cannot alloc */
 542         atomic_t buf_alloc;             /**< Buffer allocation in progress */
 543         /*@} */
 544
 545         struct mutex filelist_mutex;
 546         struct list_head filelist;
 547
 548         /** \name Memory management */
 549         /*@{ */
 550         struct list_head maplist;       /**< Linked list of regions */
 551         struct drm_open_hash map_hash;  /**< User token hash table for maps */
 552
 553         /** \name Context handle management */
 554         /*@{ */
 555         struct list_head ctxlist;       /**< Linked list of context handles */
 556         struct mutex ctxlist_mutex;     /**< For ctxlist */
 557
 558         struct idr ctx_idr;
 559
 560         struct list_head vmalist;       /**< List of vmas (for debugging) */
 561
 562         /*@} */
 563
 564         /** \name DMA support */
 565         /*@{ */
 566         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
 567         /*@} */
 568
 569         /** \name Context support */
 570         /*@{ */
 571
 572         __volatile__ long context_flag; /**< Context swapping flag */
 573         int last_context;               /**< Last current context */
 574         /*@} */
 575
 576         /** \name VBLANK IRQ support */
 577         /*@{ */
 578         bool irq_enabled;
 579         int irq;
 580
 581         /*
 582          * If true, vblank interrupt will be disabled immediately when the
 583          * refcount drops to zero, as opposed to via the vblank disable
 584          * timer.
 585          * This can be set to true it the hardware has a working vblank
 586          * counter and the driver uses drm_vblank_on() and drm_vblank_off()
 587          * appropriately.
 588          */
 589         bool vblank_disable_immediate;
 590
 591         /* array of size num_crtcs */
 592         struct drm_vblank_crtc *vblank;
 593
 594         spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
 595         spinlock_t vbl_lock;
 596
 597         u32 max_vblank_count;           /**< size of vblank counter register */
 598
 599         /**
 600          * List of events
 601          */
 602         struct list_head vblank_event_list;
 603         spinlock_t event_lock;
 604
 605         /*@} */
 606
 607         struct drm_agp_head *agp;       /**< AGP data */
 608
 609         struct pci_dev *pdev;           /**< PCI device structure */
 610 #ifdef __alpha__
 611         struct pci_controller *hose;
 612 #endif
 613
 614         struct platform_device *platformdev; /**< Platform device struture */
 615         struct virtio_device *virtdev;
 616
 617         struct drm_sg_mem *sg;  /**< Scatter gather memory */
 618         unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
 619
 620         struct {
 621                 int context;
 622                 struct drm_hw_lock *lock;
 623         } sigdata;
 624
 625         struct drm_local_map *agp_buffer_map;
 626         unsigned int agp_buffer_token;
 627
 628         struct drm_mode_config mode_config;     /**< Current mode config */
 629
 630         /** \name GEM information */
 631         /*@{ */
 632         struct mutex object_name_lock;
 633         struct idr object_name_idr;
 634         struct drm_vma_offset_manager *vma_offset_manager;
 635         /*@} */
 636         int switch_power_state;
 637 };
 638
 639 #include <drm/drm_irq.h>
 640
 641 #define DRM_SWITCH_POWER_ON 0
 642 #define DRM_SWITCH_POWER_OFF 1
 643 #define DRM_SWITCH_POWER_CHANGING 2
 644 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
 645
 646 static __inline__ int drm_core_check_feature(struct drm_device *dev,
 647                                              int feature)
 648 {
 649         return ((dev->driver->driver_features & feature) ? 1 : 0);
 650 }
 651
 652 static inline void drm_device_set_unplugged(struct drm_device *dev)
 653 {
 654         smp_wmb();
 655         atomic_set(&dev->unplugged, 1);
 656 }
 657
 658 static inline int drm_device_is_unplugged(struct drm_device *dev)
 659 {
 660         int ret = atomic_read(&dev->unplugged);
 661         smp_rmb();
 662         return ret;
 663 }
 664
 665 static inline bool drm_is_render_client(const struct drm_file *file_priv)
 666 {
 667         return file_priv->minor->type == DRM_MINOR_RENDER;
 668 }
 669
 670 static inline bool drm_is_control_client(const struct drm_file *file_priv)
 671 {
 672         return file_priv->minor->type == DRM_MINOR_CONTROL;
 673 }
 674
 675 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
 676 {
 677         return file_priv->minor->type == DRM_MINOR_PRIMARY;
 678 }
 679
 680 /******************************************************************/
 681 /** \name Internal function definitions */
 682 /*@{*/
 683
 684                                 /* Driver support (drm_drv.h) */
 685 extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
 686 extern long drm_ioctl(struct file *filp,
 687                       unsigned int cmd, unsigned long arg);
 688 #ifdef CONFIG_COMPAT
 689 extern long drm_compat_ioctl(struct file *filp,
 690                              unsigned int cmd, unsigned long arg);
 691 #else
 692 /* Let drm_compat_ioctl be assigned to .compat_ioctl unconditionally */
 693 #define drm_compat_ioctl NULL
 694 #endif
 695 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
 696
 697 /* File Operations (drm_fops.c) */
 698 int drm_open(struct inode *inode, struct file *filp);
 699 ssize_t drm_read(struct file *filp, char __user *buffer,
 700                  size_t count, loff_t *offset);
 701 int drm_release(struct inode *inode, struct file *filp);
 702 unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
 703 int drm_event_reserve_init_locked(struct drm_device *dev,
 704                                   struct drm_file *file_priv,
 705                                   struct drm_pending_event *p,
 706                                   struct drm_event *e);
 707 int drm_event_reserve_init(struct drm_device *dev,
 708                            struct drm_file *file_priv,
 709                            struct drm_pending_event *p,
 710                            struct drm_event *e);
 711 void drm_event_cancel_free(struct drm_device *dev,
 712                            struct drm_pending_event *p);
 713 void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
 714 void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
 715
 716 /* Misc. IOCTL support (drm_ioctl.c) */
 717 int drm_noop(struct drm_device *dev, void *data,
 718              struct drm_file *file_priv);
 719 int drm_invalid_op(struct drm_device *dev, void *data,
 720                    struct drm_file *file_priv);
 721
 722 /* Cache management (drm_cache.c) */
 723 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
 724 void drm_clflush_sg(struct sg_table *st);
 725 void drm_clflush_virt_range(void *addr, unsigned long length);
 726
 727 /*
 728  * These are exported to drivers so that they can implement fencing using
 729  * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
 730  */
 731
 732                                 /* Debugfs support */
 733 #if defined(CONFIG_DEBUG_FS)
 734 extern int drm_debugfs_create_files(const struct drm_info_list *files,
 735                                     int count, struct dentry *root,
 736                                     struct drm_minor *minor);
 737 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
 738                                     int count, struct drm_minor *minor);
 739 #else
 740 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
 741                                            int count, struct dentry *root,
 742                                            struct drm_minor *minor)
 743 {
 744         return 0;
 745 }
 746
 747 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
 748                                            int count, struct drm_minor *minor)
 749 {
 750         return 0;
 751 }
 752 #endif
 753
 754 struct dma_buf_export_info;
 755
 756 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
 757                                             struct drm_gem_object *obj,
 758                                             int flags);
 759 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
 760                 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
 761                 int *prime_fd);
 762 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
 763                 struct dma_buf *dma_buf);
 764 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
 765                 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
 766 struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
 767                                       struct dma_buf_export_info *exp_info);
 768 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
 769
 770 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
 771                                             dma_addr_t *addrs, int max_pages);
 772 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
 773 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
 774
 775
 776 extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
 777                                             size_t align);
 778 extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
 779
 780                                /* sysfs support (drm_sysfs.c) */
 781 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
 782
 783
 784 /*@}*/
 785
 786 /* PCI section */
 787 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
 788 {
 789         if (dev->driver->device_is_agp != NULL) {
 790                 int err = (*dev->driver->device_is_agp) (dev);
 791
 792                 if (err != 2) {
 793                         return err;
 794                 }
 795         }
 796
 797         return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
 798 }
 799 void drm_pci_agp_destroy(struct drm_device *dev);
 800
 801 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
 802 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
 803 #ifdef CONFIG_PCI
 804 extern int drm_get_pci_dev(struct pci_dev *pdev,
 805                            const struct pci_device_id *ent,
 806                            struct drm_driver *driver);
 807 extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
 808 #else
 809 static inline int drm_get_pci_dev(struct pci_dev *pdev,
 810                                   const struct pci_device_id *ent,
 811                                   struct drm_driver *driver)
 812 {
 813         return -ENOSYS;
 814 }
 815
 816 static inline int drm_pci_set_busid(struct drm_device *dev,
 817                                     struct drm_master *master)
 818 {
 819         return -ENOSYS;
 820 }
 821 #endif
 822
 823 #define DRM_PCIE_SPEED_25 1
 824 #define DRM_PCIE_SPEED_50 2
 825 #define DRM_PCIE_SPEED_80 4
 826
 827 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
 828 extern int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw);
 829
 830 /* platform section */
 831 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
 832
 833 /* returns true if currently okay to sleep */
 834 static __inline__ bool drm_can_sleep(void)
 835 {
 836         if (in_atomic() || in_dbg_master() || irqs_disabled())
 837                 return false;
 838         return true;
 839 }
 840
 841 /* helper for handling conditionals in various for_each macros */
 842 #define for_each_if(condition) if (!(condition)) {} else
 843
 844 #endif