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/sched.h>
  55 #include <linux/slab.h>
  56 #include <linux/types.h>
  57 #include <linux/vmalloc.h>
  58 #include <linux/workqueue.h>
  59 #include <linux/fence.h>
  60
  61 #include <asm/mman.h>
  62 #include <asm/pgalloc.h>
  63 #include <asm/uaccess.h>
  64
  65 #include <uapi/drm/drm.h>
  66 #include <uapi/drm/drm_mode.h>
  67
  68 #include <drm/drm_agpsupport.h>
  69 #include <drm/drm_crtc.h>
  70 #include <drm/drm_fourcc.h>
  71 #include <drm/drm_global.h>
  72 #include <drm/drm_hashtab.h>
  73 #include <drm/drm_mem_util.h>
  74 #include <drm/drm_mm.h>
  75 #include <drm/drm_os_linux.h>
  76 #include <drm/drm_sarea.h>
  77 #include <drm/drm_vma_manager.h>
  78
  79 struct module;
  80
  81 struct drm_file;
  82 struct drm_device;
  83 struct drm_agp_head;
  84 struct drm_local_map;
  85 struct drm_device_dma;
  86 struct drm_dma_handle;
  87 struct drm_gem_object;
  88 struct drm_master;
  89 struct drm_vblank_crtc;
  90
  91 struct device_node;
  92 struct videomode;
  93 struct reservation_object;
  94 struct dma_buf_attachment;
  95
  96 /*
  97  * The following categories are defined:
  98  *
  99  * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
 100  *       This is the category used by the DRM_DEBUG() macro.
 101  *
 102  * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
 103  *         This is the category used by the DRM_DEBUG_DRIVER() macro.
 104  *
 105  * KMS: used in the modesetting code.
 106  *      This is the category used by the DRM_DEBUG_KMS() macro.
 107  *
 108  * PRIME: used in the prime code.
 109  *        This is the category used by the DRM_DEBUG_PRIME() macro.
 110  *
 111  * ATOMIC: used in the atomic code.
 112  *        This is the category used by the DRM_DEBUG_ATOMIC() macro.
 113  *
 114  * VBL: used for verbose debug message in the vblank code
 115  *        This is the category used by the DRM_DEBUG_VBL() macro.
 116  *
 117  * Enabling verbose debug messages is done through the drm.debug parameter,
 118  * each category being enabled by a bit.
 119  *
 120  * drm.debug=0x1 will enable CORE messages
 121  * drm.debug=0x2 will enable DRIVER messages
 122  * drm.debug=0x3 will enable CORE and DRIVER messages
 123  * ...
 124  * drm.debug=0x3f will enable all messages
 125  *
 126  * An interesting feature is that it's possible to enable verbose logging at
 127  * run-time by echoing the debug value in its sysfs node:
 128  *   # echo 0xf > /sys/module/drm/parameters/debug
 129  */
 130 #define DRM_UT_CORE             0x01
 131 #define DRM_UT_DRIVER           0x02
 132 #define DRM_UT_KMS              0x04
 133 #define DRM_UT_PRIME            0x08
 134 #define DRM_UT_ATOMIC           0x10
 135 #define DRM_UT_VBL              0x20
 136
 137 extern __printf(2, 3)
 138 void drm_ut_debug_printk(const char *function_name,
 139                          const char *format, ...);
 140 extern __printf(1, 2)
 141 void drm_err(const char *format, ...);
 142
 143 /***********************************************************************/
 144 /** \name DRM template customization defaults */
 145 /*@{*/
 146
 147 /* driver capabilities and requirements mask */
 148 #define DRIVER_USE_AGP                  0x1
 149 #define DRIVER_PCI_DMA                  0x8
 150 #define DRIVER_SG                       0x10
 151 #define DRIVER_HAVE_DMA                 0x20
 152 #define DRIVER_HAVE_IRQ                 0x40
 153 #define DRIVER_IRQ_SHARED               0x80
 154 #define DRIVER_GEM                      0x1000
 155 #define DRIVER_MODESET                  0x2000
 156 #define DRIVER_PRIME                    0x4000
 157 #define DRIVER_RENDER                   0x8000
 158 #define DRIVER_ATOMIC                   0x10000
 159 #define DRIVER_KMS_LEGACY_CONTEXT       0x20000
 160
 161 /***********************************************************************/
 162 /** \name Macros to make printk easier */
 163 /*@{*/
 164
 165 /**
 166  * Error output.
 167  *
 168  * \param fmt printf() like format string.
 169  * \param arg arguments
 170  */
 171 #define DRM_ERROR(fmt, ...)                             \
 172         drm_err(fmt, ##__VA_ARGS__)
 173
 174 /**
 175  * Rate limited error output.  Like DRM_ERROR() but won't flood the log.
 176  *
 177  * \param fmt printf() like format string.
 178  * \param arg arguments
 179  */
 180 #define DRM_ERROR_RATELIMITED(fmt, ...)                         \
 181 ({                                                                      \
 182         static DEFINE_RATELIMIT_STATE(_rs,                              \
 183                                       DEFAULT_RATELIMIT_INTERVAL,       \
 184                                       DEFAULT_RATELIMIT_BURST);         \
 185                                                                         \
 186         if (__ratelimit(&_rs))                                          \
 187                 drm_err(fmt, ##__VA_ARGS__);                            \
 188 })
 189
 190 #define DRM_INFO(fmt, ...)                              \
 191         printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
 192
 193 #define DRM_INFO_ONCE(fmt, ...)                         \
 194         printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
 195
 196 /**
 197  * Debug output.
 198  *
 199  * \param fmt printf() like format string.
 200  * \param arg arguments
 201  */
 202 #define DRM_DEBUG(fmt, args...)                                         \
 203         do {                                                            \
 204                 if (unlikely(drm_debug & DRM_UT_CORE))                  \
 205                         drm_ut_debug_printk(__func__, fmt, ##args);     \
 206         } while (0)
 207
 208 #define DRM_DEBUG_DRIVER(fmt, args...)                                  \
 209         do {                                                            \
 210                 if (unlikely(drm_debug & DRM_UT_DRIVER))                \
 211                         drm_ut_debug_printk(__func__, fmt, ##args);     \
 212         } while (0)
 213 #define DRM_DEBUG_KMS(fmt, args...)                                     \
 214         do {                                                            \
 215                 if (unlikely(drm_debug & DRM_UT_KMS))                   \
 216                         drm_ut_debug_printk(__func__, fmt, ##args);     \
 217         } while (0)
 218 #define DRM_DEBUG_PRIME(fmt, args...)                                   \
 219         do {                                                            \
 220                 if (unlikely(drm_debug & DRM_UT_PRIME))                 \
 221                         drm_ut_debug_printk(__func__, fmt, ##args);     \
 222         } while (0)
 223 #define DRM_DEBUG_ATOMIC(fmt, args...)                                  \
 224         do {                                                            \
 225                 if (unlikely(drm_debug & DRM_UT_ATOMIC))                \
 226                         drm_ut_debug_printk(__func__, fmt, ##args);     \
 227         } while (0)
 228 #define DRM_DEBUG_VBL(fmt, args...)                                     \
 229         do {                                                            \
 230                 if (unlikely(drm_debug & DRM_UT_VBL))                   \
 231                         drm_ut_debug_printk(__func__, fmt, ##args);     \
 232         } while (0)
 233
 234 /*@}*/
 235
 236 /***********************************************************************/
 237 /** \name Internal types and structures */
 238 /*@{*/
 239
 240 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 241
 242 /**
 243  * Ioctl function type.
 244  *
 245  * \param inode device inode.
 246  * \param file_priv DRM file private pointer.
 247  * \param cmd command.
 248  * \param arg argument.
 249  */
 250 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
 251                         struct drm_file *file_priv);
 252
 253 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
 254                                unsigned long arg);
 255
 256 #define DRM_IOCTL_NR(n)                _IOC_NR(n)
 257 #define DRM_MAJOR       226
 258
 259 #define DRM_AUTH        0x1
 260 #define DRM_MASTER      0x2
 261 #define DRM_ROOT_ONLY   0x4
 262 #define DRM_CONTROL_ALLOW 0x8
 263 #define DRM_UNLOCKED    0x10
 264 #define DRM_RENDER_ALLOW 0x20
 265
 266 struct drm_ioctl_desc {
 267         unsigned int cmd;
 268         int flags;
 269         drm_ioctl_t *func;
 270         const char *name;
 271 };
 272
 273 /**
 274  * Creates a driver or general drm_ioctl_desc array entry for the given
 275  * ioctl, for use by drm_ioctl().
 276  */
 277
 278 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)                         \
 279         [DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = {        \
 280                 .cmd = DRM_IOCTL_##ioctl,                               \
 281                 .func = _func,                                          \
 282                 .flags = _flags,                                        \
 283                 .name = #ioctl                                          \
 284          }
 285
 286 /* Event queued up for userspace to read */
 287 struct drm_pending_event {
 288         struct completion *completion;
 289         struct drm_event *event;
 290         struct fence *fence;
 291         struct list_head link;
 292         struct list_head pending_link;
 293         struct drm_file *file_priv;
 294         pid_t pid; /* pid of requester, no guarantee it's valid by the time
 295                       we deliver the event, for tracing only */
 296 };
 297
 298 /* initial implementaton using a linked list - todo hashtab */
 299 struct drm_prime_file_private {
 300         struct list_head head;
 301         struct mutex lock;
 302 };
 303
 304 /** File private data */
 305 struct drm_file {
 306         unsigned authenticated :1;
 307         /* true when the client has asked us to expose stereo 3D mode flags */
 308         unsigned stereo_allowed :1;
 309         /*
 310          * true if client understands CRTC primary planes and cursor planes
 311          * in the plane list
 312          */
 313         unsigned universal_planes:1;
 314         /* true if client understands atomic properties */
 315         unsigned atomic:1;
 316         /*
 317          * This client is the creator of @master.
 318          * Protected by struct drm_device::master_mutex.
 319          */
 320         unsigned is_master:1;
 321
 322         struct pid *pid;
 323         kuid_t uid;
 324         drm_magic_t magic;
 325         struct list_head lhead;
 326         struct drm_minor *minor;
 327         unsigned long lock_count;
 328
 329         /** Mapping of mm object handles to object pointers. */
 330         struct idr object_idr;
 331         /** Lock for synchronization of access to object_idr. */
 332         spinlock_t table_lock;
 333
 334         struct file *filp;
 335         void *driver_priv;
 336
 337         struct drm_master *master; /* master this node is currently associated with
 338                                       N.B. not always dev->master */
 339         /**
 340          * fbs - List of framebuffers associated with this file.
 341          *
 342          * Protected by fbs_lock. Note that the fbs list holds a reference on
 343          * the fb object to prevent it from untimely disappearing.
 344          */
 345         struct list_head fbs;
 346         struct mutex fbs_lock;
 347
 348         /** User-created blob properties; this retains a reference on the
 349          *  property. */
 350         struct list_head blobs;
 351
 352         wait_queue_head_t event_wait;
 353         struct list_head pending_event_list;
 354         struct list_head event_list;
 355         int event_space;
 356
 357         struct mutex event_read_lock;
 358
 359         struct drm_prime_file_private prime;
 360 };
 361
 362 /**
 363  * Lock data.
 364  */
 365 struct drm_lock_data {
 366         struct drm_hw_lock *hw_lock;    /**< Hardware lock */
 367         /** Private of lock holder's file (NULL=kernel) */
 368         struct drm_file *file_priv;
 369         wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
 370         unsigned long lock_time;        /**< Time of last lock in jiffies */
 371         spinlock_t spinlock;
 372         uint32_t kernel_waiters;
 373         uint32_t user_waiters;
 374         int idle_has_lock;
 375 };
 376
 377 /* Flags and return codes for get_vblank_timestamp() driver function. */
 378 #define DRM_CALLED_FROM_VBLIRQ 1
 379 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
 380 #define DRM_VBLANKTIME_IN_VBLANK         (1 << 1)
 381
 382 /* get_scanout_position() return flags */
 383 #define DRM_SCANOUTPOS_VALID        (1 << 0)
 384 #define DRM_SCANOUTPOS_IN_VBLANK    (1 << 1)
 385 #define DRM_SCANOUTPOS_ACCURATE     (1 << 2)
 386
 387 /**
 388  * DRM driver structure. This structure represent the common code for
 389  * a family of cards. There will one drm_device for each card present
 390  * in this family
 391  */
 392 struct drm_driver {
 393         int (*load) (struct drm_device *, unsigned long flags);
 394         int (*firstopen) (struct drm_device *);
 395         int (*open) (struct drm_device *, struct drm_file *);
 396         void (*preclose) (struct drm_device *, struct drm_file *file_priv);
 397         void (*postclose) (struct drm_device *, struct drm_file *);
 398         void (*lastclose) (struct drm_device *);
 399         int (*unload) (struct drm_device *);
 400         int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
 401         int (*dma_quiescent) (struct drm_device *);
 402         int (*context_dtor) (struct drm_device *dev, int context);
 403         int (*set_busid)(struct drm_device *dev, struct drm_master *master);
 404
 405         /**
 406          * get_vblank_counter - get raw hardware vblank counter
 407          * @dev: DRM device
 408          * @pipe: counter to fetch
 409          *
 410          * Driver callback for fetching a raw hardware vblank counter for @crtc.
 411          * If a device doesn't have a hardware counter, the driver can simply
 412          * use drm_vblank_no_hw_counter() function. The DRM core will account for
 413          * missed vblank events while interrupts where disabled based on system
 414          * timestamps.
 415          *
 416          * Wraparound handling and loss of events due to modesetting is dealt
 417          * with in the DRM core code.
 418          *
 419          * RETURNS
 420          * Raw vblank counter value.
 421          */
 422         u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe);
 423
 424         /**
 425          * enable_vblank - enable vblank interrupt events
 426          * @dev: DRM device
 427          * @pipe: which irq to enable
 428          *
 429          * Enable vblank interrupts for @crtc.  If the device doesn't have
 430          * a hardware vblank counter, the driver should use the
 431          * drm_vblank_no_hw_counter() function that keeps a virtual counter.
 432          *
 433          * RETURNS
 434          * Zero on success, appropriate errno if the given @crtc's vblank
 435          * interrupt cannot be enabled.
 436          */
 437         int (*enable_vblank) (struct drm_device *dev, unsigned int pipe);
 438
 439         /**
 440          * disable_vblank - disable vblank interrupt events
 441          * @dev: DRM device
 442          * @pipe: which irq to enable
 443          *
 444          * Disable vblank interrupts for @crtc.  If the device doesn't have
 445          * a hardware vblank counter, the driver should use the
 446          * drm_vblank_no_hw_counter() function that keeps a virtual counter.
 447          */
 448         void (*disable_vblank) (struct drm_device *dev, unsigned int pipe);
 449
 450         /**
 451          * Called by \c drm_device_is_agp.  Typically used to determine if a
 452          * card is really attached to AGP or not.
 453          *
 454          * \param dev  DRM device handle
 455          *
 456          * \returns
 457          * One of three values is returned depending on whether or not the
 458          * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
 459          * (return of 1), or may or may not be AGP (return of 2).
 460          */
 461         int (*device_is_agp) (struct drm_device *dev);
 462
 463         /**
 464          * Called by vblank timestamping code.
 465          *
 466          * Return the current display scanout position from a crtc, and an
 467          * optional accurate ktime_get timestamp of when position was measured.
 468          *
 469          * \param dev  DRM device.
 470          * \param pipe Id of the crtc to query.
 471          * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
 472          * \param *vpos Target location for current vertical scanout position.
 473          * \param *hpos Target location for current horizontal scanout position.
 474          * \param *stime Target location for timestamp taken immediately before
 475          *               scanout position query. Can be NULL to skip timestamp.
 476          * \param *etime Target location for timestamp taken immediately after
 477          *               scanout position query. Can be NULL to skip timestamp.
 478          * \param mode Current display timings.
 479          *
 480          * Returns vpos as a positive number while in active scanout area.
 481          * Returns vpos as a negative number inside vblank, counting the number
 482          * of scanlines to go until end of vblank, e.g., -1 means "one scanline
 483          * until start of active scanout / end of vblank."
 484          *
 485          * \return Flags, or'ed together as follows:
 486          *
 487          * DRM_SCANOUTPOS_VALID = Query successful.
 488          * DRM_SCANOUTPOS_INVBL = Inside vblank.
 489          * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
 490          * this flag means that returned position may be offset by a constant
 491          * but unknown small number of scanlines wrt. real scanout position.
 492          *
 493          */
 494         int (*get_scanout_position) (struct drm_device *dev, unsigned int pipe,
 495                                      unsigned int flags, int *vpos, int *hpos,
 496                                      ktime_t *stime, ktime_t *etime,
 497                                      const struct drm_display_mode *mode);
 498
 499         /**
 500          * Called by \c drm_get_last_vbltimestamp. Should return a precise
 501          * timestamp when the most recent VBLANK interval ended or will end.
 502          *
 503          * Specifically, the timestamp in @vblank_time should correspond as
 504          * closely as possible to the time when the first video scanline of
 505          * the video frame after the end of VBLANK will start scanning out,
 506          * the time immediately after end of the VBLANK interval. If the
 507          * @crtc is currently inside VBLANK, this will be a time in the future.
 508          * If the @crtc is currently scanning out a frame, this will be the
 509          * past start time of the current scanout. This is meant to adhere
 510          * to the OpenML OML_sync_control extension specification.
 511          *
 512          * \param dev dev DRM device handle.
 513          * \param pipe crtc for which timestamp should be returned.
 514          * \param *max_error Maximum allowable timestamp error in nanoseconds.
 515          *                   Implementation should strive to provide timestamp
 516          *                   with an error of at most *max_error nanoseconds.
 517          *                   Returns true upper bound on error for timestamp.
 518          * \param *vblank_time Target location for returned vblank timestamp.
 519          * \param flags 0 = Defaults, no special treatment needed.
 520          * \param       DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
 521          *              irq handler. Some drivers need to apply some workarounds
 522          *              for gpu-specific vblank irq quirks if flag is set.
 523          *
 524          * \returns
 525          * Zero if timestamping isn't supported in current display mode or a
 526          * negative number on failure. A positive status code on success,
 527          * which describes how the vblank_time timestamp was computed.
 528          */
 529         int (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe,
 530                                      int *max_error,
 531                                      struct timeval *vblank_time,
 532                                      unsigned flags);
 533
 534         /* these have to be filled in */
 535
 536         irqreturn_t(*irq_handler) (int irq, void *arg);
 537         void (*irq_preinstall) (struct drm_device *dev);
 538         int (*irq_postinstall) (struct drm_device *dev);
 539         void (*irq_uninstall) (struct drm_device *dev);
 540
 541         /* Master routines */
 542         int (*master_create)(struct drm_device *dev, struct drm_master *master);
 543         void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
 544         /**
 545          * master_set is called whenever the minor master is set.
 546          * master_drop is called whenever the minor master is dropped.
 547          */
 548
 549         int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
 550                           bool from_open);
 551         void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
 552
 553         int (*debugfs_init)(struct drm_minor *minor);
 554         void (*debugfs_cleanup)(struct drm_minor *minor);
 555
 556         /**
 557          * @gem_free_object: deconstructor for drm_gem_objects
 558          *
 559          * This is deprecated and should not be used by new drivers. Use
 560          * @gem_free_object_unlocked instead.
 561          */
 562         void (*gem_free_object) (struct drm_gem_object *obj);
 563
 564         /**
 565          * @gem_free_object_unlocked: deconstructor for drm_gem_objects
 566          *
 567          * This is for drivers which are not encumbered with dev->struct_mutex
 568          * legacy locking schemes. Use this hook instead of @gem_free_object.
 569          */
 570         void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
 571
 572         int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
 573         void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
 574
 575         /**
 576          * Hook for allocating the GEM object struct, for use by core
 577          * helpers.
 578          */
 579         struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
 580                                                     size_t size);
 581
 582         /* prime: */
 583         /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
 584         int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
 585                                 uint32_t handle, uint32_t flags, int *prime_fd);
 586         /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
 587         int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
 588                                 int prime_fd, uint32_t *handle);
 589         /* export GEM -> dmabuf */
 590         struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
 591                                 struct drm_gem_object *obj, int flags);
 592         /* import dmabuf -> GEM */
 593         struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
 594                                 struct dma_buf *dma_buf);
 595         /* low-level interface used by drm_gem_prime_{import,export} */
 596         int (*gem_prime_pin)(struct drm_gem_object *obj);
 597         void (*gem_prime_unpin)(struct drm_gem_object *obj);
 598         struct reservation_object * (*gem_prime_res_obj)(
 599                                 struct drm_gem_object *obj);
 600         struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
 601         struct drm_gem_object *(*gem_prime_import_sg_table)(
 602                                 struct drm_device *dev,
 603                                 struct dma_buf_attachment *attach,
 604                                 struct sg_table *sgt);
 605         void *(*gem_prime_vmap)(struct drm_gem_object *obj);
 606         void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
 607         int (*gem_prime_mmap)(struct drm_gem_object *obj,
 608                                 struct vm_area_struct *vma);
 609
 610         /* vga arb irq handler */
 611         void (*vgaarb_irq)(struct drm_device *dev, bool state);
 612
 613         /* dumb alloc support */
 614         int (*dumb_create)(struct drm_file *file_priv,
 615                            struct drm_device *dev,
 616                            struct drm_mode_create_dumb *args);
 617         int (*dumb_map_offset)(struct drm_file *file_priv,
 618                                struct drm_device *dev, uint32_t handle,
 619                                uint64_t *offset);
 620         int (*dumb_destroy)(struct drm_file *file_priv,
 621                             struct drm_device *dev,
 622                             uint32_t handle);
 623
 624         /* Driver private ops for this object */
 625         const struct vm_operations_struct *gem_vm_ops;
 626
 627         int major;
 628         int minor;
 629         int patchlevel;
 630         char *name;
 631         char *desc;
 632         char *date;
 633
 634         u32 driver_features;
 635         int dev_priv_size;
 636         const struct drm_ioctl_desc *ioctls;
 637         int num_ioctls;
 638         const struct file_operations *fops;
 639
 640         /* List of devices hanging off this driver with stealth attach. */
 641         struct list_head legacy_dev_list;
 642 };
 643
 644 enum drm_minor_type {
 645         DRM_MINOR_LEGACY,
 646         DRM_MINOR_CONTROL,
 647         DRM_MINOR_RENDER,
 648         DRM_MINOR_CNT,
 649 };
 650
 651 /**
 652  * Info file list entry. This structure represents a debugfs or proc file to
 653  * be created by the drm core
 654  */
 655 struct drm_info_list {
 656         const char *name; /** file name */
 657         int (*show)(struct seq_file*, void*); /** show callback */
 658         u32 driver_features; /**< Required driver features for this entry */
 659         void *data;
 660 };
 661
 662 /**
 663  * debugfs node structure. This structure represents a debugfs file.
 664  */
 665 struct drm_info_node {
 666         struct list_head list;
 667         struct drm_minor *minor;
 668         const struct drm_info_list *info_ent;
 669         struct dentry *dent;
 670 };
 671
 672 /**
 673  * DRM minor structure. This structure represents a drm minor number.
 674  */
 675 struct drm_minor {
 676         int index;                      /**< Minor device number */
 677         int type;                       /**< Control or render */
 678         struct device *kdev;            /**< Linux device */
 679         struct drm_device *dev;
 680
 681         struct dentry *debugfs_root;
 682
 683         struct list_head debugfs_list;
 684         struct mutex debugfs_lock; /* Protects debugfs_list. */
 685 };
 686
 687 /**
 688  * DRM device structure. This structure represent a complete card that
 689  * may contain multiple heads.
 690  */
 691 struct drm_device {
 692         struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
 693         int if_version;                 /**< Highest interface version set */
 694
 695         /** \name Lifetime Management */
 696         /*@{ */
 697         struct kref ref;                /**< Object ref-count */
 698         struct device *dev;             /**< Device structure of bus-device */
 699         struct drm_driver *driver;      /**< DRM driver managing the device */
 700         void *dev_private;              /**< DRM driver private data */
 701         struct drm_minor *control;              /**< Control node */
 702         struct drm_minor *primary;              /**< Primary node */
 703         struct drm_minor *render;               /**< Render node */
 704
 705         /* currently active master for this device. Protected by master_mutex */
 706         struct drm_master *master;
 707
 708         atomic_t unplugged;                     /**< Flag whether dev is dead */
 709         struct inode *anon_inode;               /**< inode for private address-space */
 710         char *unique;                           /**< unique name of the device */
 711         /*@} */
 712
 713         /** \name Locks */
 714         /*@{ */
 715         struct mutex struct_mutex;      /**< For others */
 716         struct mutex master_mutex;      /**< For drm_minor::master and drm_file::is_master */
 717         /*@} */
 718
 719         /** \name Usage Counters */
 720         /*@{ */
 721         int open_count;                 /**< Outstanding files open, protected by drm_global_mutex. */
 722         spinlock_t buf_lock;            /**< For drm_device::buf_use and a few other things. */
 723         int buf_use;                    /**< Buffers in use -- cannot alloc */
 724         atomic_t buf_alloc;             /**< Buffer allocation in progress */
 725         /*@} */
 726
 727         struct mutex filelist_mutex;
 728         struct list_head filelist;
 729
 730         /** \name Memory management */
 731         /*@{ */
 732         struct list_head maplist;       /**< Linked list of regions */
 733         struct drm_open_hash map_hash;  /**< User token hash table for maps */
 734
 735         /** \name Context handle management */
 736         /*@{ */
 737         struct list_head ctxlist;       /**< Linked list of context handles */
 738         struct mutex ctxlist_mutex;     /**< For ctxlist */
 739
 740         struct idr ctx_idr;
 741
 742         struct list_head vmalist;       /**< List of vmas (for debugging) */
 743
 744         /*@} */
 745
 746         /** \name DMA support */
 747         /*@{ */
 748         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
 749         /*@} */
 750
 751         /** \name Context support */
 752         /*@{ */
 753
 754         __volatile__ long context_flag; /**< Context swapping flag */
 755         int last_context;               /**< Last current context */
 756         /*@} */
 757
 758         /** \name VBLANK IRQ support */
 759         /*@{ */
 760         bool irq_enabled;
 761         int irq;
 762
 763         /*
 764          * If true, vblank interrupt will be disabled immediately when the
 765          * refcount drops to zero, as opposed to via the vblank disable
 766          * timer.
 767          * This can be set to true it the hardware has a working vblank
 768          * counter and the driver uses drm_vblank_on() and drm_vblank_off()
 769          * appropriately.
 770          */
 771         bool vblank_disable_immediate;
 772
 773         /* array of size num_crtcs */
 774         struct drm_vblank_crtc *vblank;
 775
 776         spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
 777         spinlock_t vbl_lock;
 778
 779         u32 max_vblank_count;           /**< size of vblank counter register */
 780
 781         /**
 782          * List of events
 783          */
 784         struct list_head vblank_event_list;
 785         spinlock_t event_lock;
 786
 787         /*@} */
 788
 789         struct drm_agp_head *agp;       /**< AGP data */
 790
 791         struct pci_dev *pdev;           /**< PCI device structure */
 792 #ifdef __alpha__
 793         struct pci_controller *hose;
 794 #endif
 795
 796         struct platform_device *platformdev; /**< Platform device struture */
 797         struct virtio_device *virtdev;
 798
 799         struct drm_sg_mem *sg;  /**< Scatter gather memory */
 800         unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
 801
 802         struct {
 803                 int context;
 804                 struct drm_hw_lock *lock;
 805         } sigdata;
 806
 807         struct drm_local_map *agp_buffer_map;
 808         unsigned int agp_buffer_token;
 809
 810         struct drm_mode_config mode_config;     /**< Current mode config */
 811
 812         /** \name GEM information */
 813         /*@{ */
 814         struct mutex object_name_lock;
 815         struct idr object_name_idr;
 816         struct drm_vma_offset_manager *vma_offset_manager;
 817         /*@} */
 818         int switch_power_state;
 819 };
 820
 821 #include <drm/drm_irq.h>
 822
 823 #define DRM_SWITCH_POWER_ON 0
 824 #define DRM_SWITCH_POWER_OFF 1
 825 #define DRM_SWITCH_POWER_CHANGING 2
 826 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
 827
 828 static __inline__ int drm_core_check_feature(struct drm_device *dev,
 829                                              int feature)
 830 {
 831         return ((dev->driver->driver_features & feature) ? 1 : 0);
 832 }
 833
 834 static inline void drm_device_set_unplugged(struct drm_device *dev)
 835 {
 836         smp_wmb();
 837         atomic_set(&dev->unplugged, 1);
 838 }
 839
 840 static inline int drm_device_is_unplugged(struct drm_device *dev)
 841 {
 842         int ret = atomic_read(&dev->unplugged);
 843         smp_rmb();
 844         return ret;
 845 }
 846
 847 static inline bool drm_is_render_client(const struct drm_file *file_priv)
 848 {
 849         return file_priv->minor->type == DRM_MINOR_RENDER;
 850 }
 851
 852 static inline bool drm_is_control_client(const struct drm_file *file_priv)
 853 {
 854         return file_priv->minor->type == DRM_MINOR_CONTROL;
 855 }
 856
 857 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
 858 {
 859         return file_priv->minor->type == DRM_MINOR_LEGACY;
 860 }
 861
 862 /******************************************************************/
 863 /** \name Internal function definitions */
 864 /*@{*/
 865
 866                                 /* Driver support (drm_drv.h) */
 867 extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
 868 extern long drm_ioctl(struct file *filp,
 869                       unsigned int cmd, unsigned long arg);
 870 extern long drm_compat_ioctl(struct file *filp,
 871                              unsigned int cmd, unsigned long arg);
 872 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
 873
 874 /* File Operations (drm_fops.c) */
 875 int drm_open(struct inode *inode, struct file *filp);
 876 ssize_t drm_read(struct file *filp, char __user *buffer,
 877                  size_t count, loff_t *offset);
 878 int drm_release(struct inode *inode, struct file *filp);
 879 unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
 880 int drm_event_reserve_init_locked(struct drm_device *dev,
 881                                   struct drm_file *file_priv,
 882                                   struct drm_pending_event *p,
 883                                   struct drm_event *e);
 884 int drm_event_reserve_init(struct drm_device *dev,
 885                            struct drm_file *file_priv,
 886                            struct drm_pending_event *p,
 887                            struct drm_event *e);
 888 void drm_event_cancel_free(struct drm_device *dev,
 889                            struct drm_pending_event *p);
 890 void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
 891 void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
 892
 893 /* Misc. IOCTL support (drm_ioctl.c) */
 894 int drm_noop(struct drm_device *dev, void *data,
 895              struct drm_file *file_priv);
 896 int drm_invalid_op(struct drm_device *dev, void *data,
 897                    struct drm_file *file_priv);
 898
 899 /* Cache management (drm_cache.c) */
 900 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
 901 void drm_clflush_sg(struct sg_table *st);
 902 void drm_clflush_virt_range(void *addr, unsigned long length);
 903
 904 /*
 905  * These are exported to drivers so that they can implement fencing using
 906  * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
 907  */
 908
 909 /* Modesetting support */
 910 extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
 911 extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
 912
 913 /* drm_drv.c */
 914 void drm_put_dev(struct drm_device *dev);
 915 void drm_unplug_dev(struct drm_device *dev);
 916 extern unsigned int drm_debug;
 917
 918                                 /* Debugfs support */
 919 #if defined(CONFIG_DEBUG_FS)
 920 extern int drm_debugfs_create_files(const struct drm_info_list *files,
 921                                     int count, struct dentry *root,
 922                                     struct drm_minor *minor);
 923 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
 924                                     int count, struct drm_minor *minor);
 925 #else
 926 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
 927                                            int count, struct dentry *root,
 928                                            struct drm_minor *minor)
 929 {
 930         return 0;
 931 }
 932
 933 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
 934                                            int count, struct drm_minor *minor)
 935 {
 936         return 0;
 937 }
 938 #endif
 939
 940 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
 941                 struct drm_gem_object *obj, int flags);
 942 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
 943                 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
 944                 int *prime_fd);
 945 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
 946                 struct dma_buf *dma_buf);
 947 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
 948                 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
 949 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
 950
 951 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
 952                                             dma_addr_t *addrs, int max_pages);
 953 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
 954 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
 955
 956
 957 extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
 958                                             size_t align);
 959 extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
 960
 961                                /* sysfs support (drm_sysfs.c) */
 962 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
 963
 964
 965 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
 966                                  struct device *parent);
 967 int drm_dev_init(struct drm_device *dev,
 968                  struct drm_driver *driver,
 969                  struct device *parent);
 970 void drm_dev_ref(struct drm_device *dev);
 971 void drm_dev_unref(struct drm_device *dev);
 972 int drm_dev_register(struct drm_device *dev, unsigned long flags);
 973 void drm_dev_unregister(struct drm_device *dev);
 974
 975 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
 976 void drm_minor_release(struct drm_minor *minor);
 977
 978 /*@}*/
 979
 980 /* PCI section */
 981 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
 982 {
 983         if (dev->driver->device_is_agp != NULL) {
 984                 int err = (*dev->driver->device_is_agp) (dev);
 985
 986                 if (err != 2) {
 987                         return err;
 988                 }
 989         }
 990
 991         return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
 992 }
 993 void drm_pci_agp_destroy(struct drm_device *dev);
 994
 995 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
 996 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
 997 #ifdef CONFIG_PCI
 998 extern int drm_get_pci_dev(struct pci_dev *pdev,
 999                            const struct pci_device_id *ent,
1000                            struct drm_driver *driver);
1001 extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
1002 #else
1003 static inline int drm_get_pci_dev(struct pci_dev *pdev,
1004                                   const struct pci_device_id *ent,
1005                                   struct drm_driver *driver)
1006 {
1007         return -ENOSYS;
1008 }
1009
1010 static inline int drm_pci_set_busid(struct drm_device *dev,
1011                                     struct drm_master *master)
1012 {
1013         return -ENOSYS;
1014 }
1015 #endif
1016
1017 #define DRM_PCIE_SPEED_25 1
1018 #define DRM_PCIE_SPEED_50 2
1019 #define DRM_PCIE_SPEED_80 4
1020
1021 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1022 extern int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw);
1023
1024 /* platform section */
1025 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1026
1027 /* returns true if currently okay to sleep */
1028 static __inline__ bool drm_can_sleep(void)
1029 {
1030         if (in_atomic() || in_dbg_master() || irqs_disabled())
1031                 return false;
1032         return true;
1033 }
1034
1035 /* helper for handling conditionals in various for_each macros */
1036 #define for_each_if(condition) if (!(condition)) {} else
1037
1038 #endif