2 * Internal Header for the Direct Rendering Manager
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.
9 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
10 * Author: Gareth Hughes <gareth@valinux.com>
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:
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
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.
35 #include <linux/agp_backend.h>
36 #include <linux/cdev.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/file.h>
40 #include <linux/highmem.h>
41 #include <linux/idr.h>
42 #include <linux/init.h>
44 #include <linux/jiffies.h>
45 #include <linux/kernel.h>
46 #include <linux/kref.h>
47 #include <linux/miscdevice.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>
61 #include <asm/pgalloc.h>
62 #include <asm/uaccess.h>
64 #include <uapi/drm/drm.h>
65 #include <uapi/drm/drm_mode.h>
67 #include <drm/drm_agpsupport.h>
68 #include <drm/drm_crtc.h>
69 #include <drm/drm_global.h>
70 #include <drm/drm_hashtab.h>
71 #include <drm/drm_mem_util.h>
72 #include <drm/drm_mm.h>
73 #include <drm/drm_os_linux.h>
74 #include <drm/drm_sarea.h>
75 #include <drm/drm_vma_manager.h>
83 struct drm_device_dma
;
84 struct drm_dma_handle
;
85 struct drm_gem_object
;
89 struct reservation_object
;
90 struct dma_buf_attachment
;
93 * 4 debug categories are defined:
95 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
96 * This is the category used by the DRM_DEBUG() macro.
98 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
99 * This is the category used by the DRM_DEBUG_DRIVER() macro.
101 * KMS: used in the modesetting code.
102 * This is the category used by the DRM_DEBUG_KMS() macro.
104 * PRIME: used in the prime code.
105 * This is the category used by the DRM_DEBUG_PRIME() macro.
107 * ATOMIC: used in the atomic code.
108 * This is the category used by the DRM_DEBUG_ATOMIC() macro.
110 * Enabling verbose debug messages is done through the drm.debug parameter,
111 * each category being enabled by a bit.
113 * drm.debug=0x1 will enable CORE messages
114 * drm.debug=0x2 will enable DRIVER messages
115 * drm.debug=0x3 will enable CORE and DRIVER messages
117 * drm.debug=0xf will enable all messages
119 * An interesting feature is that it's possible to enable verbose logging at
120 * run-time by echoing the debug value in its sysfs node:
121 * # echo 0xf > /sys/module/drm/parameters/debug
123 #define DRM_UT_CORE 0x01
124 #define DRM_UT_DRIVER 0x02
125 #define DRM_UT_KMS 0x04
126 #define DRM_UT_PRIME 0x08
127 #define DRM_UT_ATOMIC 0x10
129 extern __printf(2, 3)
130 void drm_ut_debug_printk(const char *function_name
,
131 const char *format
, ...);
132 extern __printf(1, 2)
133 void drm_err(const char *format
, ...);
135 /***********************************************************************/
136 /** \name DRM template customization defaults */
139 /* driver capabilities and requirements mask */
140 #define DRIVER_USE_AGP 0x1
141 #define DRIVER_PCI_DMA 0x8
142 #define DRIVER_SG 0x10
143 #define DRIVER_HAVE_DMA 0x20
144 #define DRIVER_HAVE_IRQ 0x40
145 #define DRIVER_IRQ_SHARED 0x80
146 #define DRIVER_GEM 0x1000
147 #define DRIVER_MODESET 0x2000
148 #define DRIVER_PRIME 0x4000
149 #define DRIVER_RENDER 0x8000
150 #define DRIVER_ATOMIC 0x10000
152 /***********************************************************************/
153 /** \name Macros to make printk easier */
159 * \param fmt printf() like format string.
160 * \param arg arguments
162 #define DRM_ERROR(fmt, ...) \
163 drm_err(fmt, ##__VA_ARGS__)
166 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
168 * \param fmt printf() like format string.
169 * \param arg arguments
171 #define DRM_ERROR_RATELIMITED(fmt, ...) \
173 static DEFINE_RATELIMIT_STATE(_rs, \
174 DEFAULT_RATELIMIT_INTERVAL, \
175 DEFAULT_RATELIMIT_BURST); \
177 if (__ratelimit(&_rs)) \
178 drm_err(fmt, ##__VA_ARGS__); \
181 #define DRM_INFO(fmt, ...) \
182 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
184 #define DRM_INFO_ONCE(fmt, ...) \
185 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
190 * \param fmt printf() like format string.
191 * \param arg arguments
193 #define DRM_DEBUG(fmt, args...) \
195 if (unlikely(drm_debug & DRM_UT_CORE)) \
196 drm_ut_debug_printk(__func__, fmt, ##args); \
199 #define DRM_DEBUG_DRIVER(fmt, args...) \
201 if (unlikely(drm_debug & DRM_UT_DRIVER)) \
202 drm_ut_debug_printk(__func__, fmt, ##args); \
204 #define DRM_DEBUG_KMS(fmt, args...) \
206 if (unlikely(drm_debug & DRM_UT_KMS)) \
207 drm_ut_debug_printk(__func__, fmt, ##args); \
209 #define DRM_DEBUG_PRIME(fmt, args...) \
211 if (unlikely(drm_debug & DRM_UT_PRIME)) \
212 drm_ut_debug_printk(__func__, fmt, ##args); \
214 #define DRM_DEBUG_ATOMIC(fmt, args...) \
216 if (unlikely(drm_debug & DRM_UT_ATOMIC)) \
217 drm_ut_debug_printk(__func__, fmt, ##args); \
222 /***********************************************************************/
223 /** \name Internal types and structures */
226 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
229 * Ioctl function type.
231 * \param inode device inode.
232 * \param file_priv DRM file private pointer.
233 * \param cmd command.
234 * \param arg argument.
236 typedef int drm_ioctl_t(struct drm_device
*dev
, void *data
,
237 struct drm_file
*file_priv
);
239 typedef int drm_ioctl_compat_t(struct file
*filp
, unsigned int cmd
,
242 #define DRM_IOCTL_NR(n) _IOC_NR(n)
243 #define DRM_MAJOR 226
246 #define DRM_MASTER 0x2
247 #define DRM_ROOT_ONLY 0x4
248 #define DRM_CONTROL_ALLOW 0x8
249 #define DRM_UNLOCKED 0x10
250 #define DRM_RENDER_ALLOW 0x20
252 struct drm_ioctl_desc
{
260 * Creates a driver or general drm_ioctl_desc array entry for the given
261 * ioctl, for use by drm_ioctl().
264 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
265 [DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = { \
266 .cmd = DRM_IOCTL_##ioctl, \
272 /* Event queued up for userspace to read */
273 struct drm_pending_event
{
274 struct drm_event
*event
;
275 struct list_head link
;
276 struct drm_file
*file_priv
;
277 pid_t pid
; /* pid of requester, no guarantee it's valid by the time
278 we deliver the event, for tracing only */
279 void (*destroy
)(struct drm_pending_event
*event
);
282 /* initial implementaton using a linked list - todo hashtab */
283 struct drm_prime_file_private
{
284 struct list_head head
;
288 /** File private data */
290 unsigned authenticated
:1;
291 /* Whether we're master for a minor. Protected by master_mutex */
292 unsigned is_master
:1;
293 /* true when the client has asked us to expose stereo 3D mode flags */
294 unsigned stereo_allowed
:1;
296 * true if client understands CRTC primary planes and cursor planes
299 unsigned universal_planes
:1;
300 /* true if client understands atomic properties */
306 struct list_head lhead
;
307 struct drm_minor
*minor
;
308 unsigned long lock_count
;
310 /** Mapping of mm object handles to object pointers. */
311 struct idr object_idr
;
312 /** Lock for synchronization of access to object_idr. */
313 spinlock_t table_lock
;
318 struct drm_master
*master
; /* master this node is currently associated with
319 N.B. not always minor->master */
321 * fbs - List of framebuffers associated with this file.
323 * Protected by fbs_lock. Note that the fbs list holds a reference on
324 * the fb object to prevent it from untimely disappearing.
326 struct list_head fbs
;
327 struct mutex fbs_lock
;
329 wait_queue_head_t event_wait
;
330 struct list_head event_list
;
333 struct drm_prime_file_private prime
;
339 struct drm_lock_data
{
340 struct drm_hw_lock
*hw_lock
; /**< Hardware lock */
341 /** Private of lock holder's file (NULL=kernel) */
342 struct drm_file
*file_priv
;
343 wait_queue_head_t lock_queue
; /**< Queue of blocked processes */
344 unsigned long lock_time
; /**< Time of last lock in jiffies */
346 uint32_t kernel_waiters
;
347 uint32_t user_waiters
;
352 * struct drm_master - drm master structure
354 * @refcount: Refcount for this master object.
355 * @minor: Link back to minor char device we are master for. Immutable.
356 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
357 * @unique_len: Length of unique field. Protected by drm_global_mutex.
358 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
359 * @lock: DRI lock information.
360 * @driver_priv: Pointer to driver-private information.
363 struct kref refcount
;
364 struct drm_minor
*minor
;
367 struct drm_open_hash magiclist
;
368 struct drm_lock_data lock
;
372 /* Size of ringbuffer for vblank timestamps. Just double-buffer
373 * in initial implementation.
375 #define DRM_VBLANKTIME_RBSIZE 2
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)
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)
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
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 (*suspend
) (struct drm_device
*, pm_message_t state
);
401 int (*resume
) (struct drm_device
*);
402 int (*dma_ioctl
) (struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
);
403 int (*dma_quiescent
) (struct drm_device
*);
404 int (*context_dtor
) (struct drm_device
*dev
, int context
);
405 int (*set_busid
)(struct drm_device
*dev
, struct drm_master
*master
);
408 * get_vblank_counter - get raw hardware vblank counter
410 * @crtc: counter to fetch
412 * Driver callback for fetching a raw hardware vblank counter for @crtc.
413 * If a device doesn't have a hardware counter, the driver can simply
414 * return the value of drm_vblank_count. The DRM core will account for
415 * missed vblank events while interrupts where disabled based on system
418 * Wraparound handling and loss of events due to modesetting is dealt
419 * with in the DRM core code.
422 * Raw vblank counter value.
424 u32 (*get_vblank_counter
) (struct drm_device
*dev
, int crtc
);
427 * enable_vblank - enable vblank interrupt events
429 * @crtc: which irq to enable
431 * Enable vblank interrupts for @crtc. If the device doesn't have
432 * a hardware vblank counter, this routine should be a no-op, since
433 * interrupts will have to stay on to keep the count accurate.
436 * Zero on success, appropriate errno if the given @crtc's vblank
437 * interrupt cannot be enabled.
439 int (*enable_vblank
) (struct drm_device
*dev
, int crtc
);
442 * disable_vblank - disable vblank interrupt events
444 * @crtc: which irq to enable
446 * Disable vblank interrupts for @crtc. If the device doesn't have
447 * a hardware vblank counter, this routine should be a no-op, since
448 * interrupts will have to stay on to keep the count accurate.
450 void (*disable_vblank
) (struct drm_device
*dev
, int crtc
);
453 * Called by \c drm_device_is_agp. Typically used to determine if a
454 * card is really attached to AGP or not.
456 * \param dev DRM device handle
459 * One of three values is returned depending on whether or not the
460 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
461 * (return of 1), or may or may not be AGP (return of 2).
463 int (*device_is_agp
) (struct drm_device
*dev
);
466 * Called by vblank timestamping code.
468 * Return the current display scanout position from a crtc, and an
469 * optional accurate ktime_get timestamp of when position was measured.
471 * \param dev DRM device.
472 * \param crtc Id of the crtc to query.
473 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
474 * \param *vpos Target location for current vertical scanout position.
475 * \param *hpos Target location for current horizontal scanout position.
476 * \param *stime Target location for timestamp taken immediately before
477 * scanout position query. Can be NULL to skip timestamp.
478 * \param *etime Target location for timestamp taken immediately after
479 * scanout position query. Can be NULL to skip timestamp.
481 * Returns vpos as a positive number while in active scanout area.
482 * Returns vpos as a negative number inside vblank, counting the number
483 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
484 * until start of active scanout / end of vblank."
486 * \return Flags, or'ed together as follows:
488 * DRM_SCANOUTPOS_VALID = Query successful.
489 * DRM_SCANOUTPOS_INVBL = Inside vblank.
490 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
491 * this flag means that returned position may be offset by a constant
492 * but unknown small number of scanlines wrt. real scanout position.
495 int (*get_scanout_position
) (struct drm_device
*dev
, int crtc
,
497 int *vpos
, int *hpos
, ktime_t
*stime
,
501 * Called by \c drm_get_last_vbltimestamp. Should return a precise
502 * timestamp when the most recent VBLANK interval ended or will end.
504 * Specifically, the timestamp in @vblank_time should correspond as
505 * closely as possible to the time when the first video scanline of
506 * the video frame after the end of VBLANK will start scanning out,
507 * the time immediately after end of the VBLANK interval. If the
508 * @crtc is currently inside VBLANK, this will be a time in the future.
509 * If the @crtc is currently scanning out a frame, this will be the
510 * past start time of the current scanout. This is meant to adhere
511 * to the OpenML OML_sync_control extension specification.
513 * \param dev dev DRM device handle.
514 * \param crtc crtc for which timestamp should be returned.
515 * \param *max_error Maximum allowable timestamp error in nanoseconds.
516 * Implementation should strive to provide timestamp
517 * with an error of at most *max_error nanoseconds.
518 * Returns true upper bound on error for timestamp.
519 * \param *vblank_time Target location for returned vblank timestamp.
520 * \param flags 0 = Defaults, no special treatment needed.
521 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
522 * irq handler. Some drivers need to apply some workarounds
523 * for gpu-specific vblank irq quirks if flag is set.
526 * Zero if timestamping isn't supported in current display mode or a
527 * negative number on failure. A positive status code on success,
528 * which describes how the vblank_time timestamp was computed.
530 int (*get_vblank_timestamp
) (struct drm_device
*dev
, int crtc
,
532 struct timeval
*vblank_time
,
535 /* these have to be filled in */
537 irqreturn_t(*irq_handler
) (int irq
, void *arg
);
538 void (*irq_preinstall
) (struct drm_device
*dev
);
539 int (*irq_postinstall
) (struct drm_device
*dev
);
540 void (*irq_uninstall
) (struct drm_device
*dev
);
542 /* Master routines */
543 int (*master_create
)(struct drm_device
*dev
, struct drm_master
*master
);
544 void (*master_destroy
)(struct drm_device
*dev
, struct drm_master
*master
);
546 * master_set is called whenever the minor master is set.
547 * master_drop is called whenever the minor master is dropped.
550 int (*master_set
)(struct drm_device
*dev
, struct drm_file
*file_priv
,
552 void (*master_drop
)(struct drm_device
*dev
, struct drm_file
*file_priv
,
555 int (*debugfs_init
)(struct drm_minor
*minor
);
556 void (*debugfs_cleanup
)(struct drm_minor
*minor
);
559 * Driver-specific constructor for drm_gem_objects, to set up
560 * obj->driver_private.
562 * Returns 0 on success.
564 void (*gem_free_object
) (struct drm_gem_object
*obj
);
565 int (*gem_open_object
) (struct drm_gem_object
*, struct drm_file
*);
566 void (*gem_close_object
) (struct drm_gem_object
*, struct drm_file
*);
569 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
570 int (*prime_handle_to_fd
)(struct drm_device
*dev
, struct drm_file
*file_priv
,
571 uint32_t handle
, uint32_t flags
, int *prime_fd
);
572 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
573 int (*prime_fd_to_handle
)(struct drm_device
*dev
, struct drm_file
*file_priv
,
574 int prime_fd
, uint32_t *handle
);
575 /* export GEM -> dmabuf */
576 struct dma_buf
* (*gem_prime_export
)(struct drm_device
*dev
,
577 struct drm_gem_object
*obj
, int flags
);
578 /* import dmabuf -> GEM */
579 struct drm_gem_object
* (*gem_prime_import
)(struct drm_device
*dev
,
580 struct dma_buf
*dma_buf
);
581 /* low-level interface used by drm_gem_prime_{import,export} */
582 int (*gem_prime_pin
)(struct drm_gem_object
*obj
);
583 void (*gem_prime_unpin
)(struct drm_gem_object
*obj
);
584 struct reservation_object
* (*gem_prime_res_obj
)(
585 struct drm_gem_object
*obj
);
586 struct sg_table
*(*gem_prime_get_sg_table
)(struct drm_gem_object
*obj
);
587 struct drm_gem_object
*(*gem_prime_import_sg_table
)(
588 struct drm_device
*dev
,
589 struct dma_buf_attachment
*attach
,
590 struct sg_table
*sgt
);
591 void *(*gem_prime_vmap
)(struct drm_gem_object
*obj
);
592 void (*gem_prime_vunmap
)(struct drm_gem_object
*obj
, void *vaddr
);
593 int (*gem_prime_mmap
)(struct drm_gem_object
*obj
,
594 struct vm_area_struct
*vma
);
596 /* vga arb irq handler */
597 void (*vgaarb_irq
)(struct drm_device
*dev
, bool state
);
599 /* dumb alloc support */
600 int (*dumb_create
)(struct drm_file
*file_priv
,
601 struct drm_device
*dev
,
602 struct drm_mode_create_dumb
*args
);
603 int (*dumb_map_offset
)(struct drm_file
*file_priv
,
604 struct drm_device
*dev
, uint32_t handle
,
606 int (*dumb_destroy
)(struct drm_file
*file_priv
,
607 struct drm_device
*dev
,
610 /* Driver private ops for this object */
611 const struct vm_operations_struct
*gem_vm_ops
;
622 const struct drm_ioctl_desc
*ioctls
;
624 const struct file_operations
*fops
;
626 /* List of devices hanging off this driver with stealth attach. */
627 struct list_head legacy_dev_list
;
630 enum drm_minor_type
{
638 * Info file list entry. This structure represents a debugfs or proc file to
639 * be created by the drm core
641 struct drm_info_list
{
642 const char *name
; /** file name */
643 int (*show
)(struct seq_file
*, void*); /** show callback */
644 u32 driver_features
; /**< Required driver features for this entry */
649 * debugfs node structure. This structure represents a debugfs file.
651 struct drm_info_node
{
652 struct list_head list
;
653 struct drm_minor
*minor
;
654 const struct drm_info_list
*info_ent
;
659 * DRM minor structure. This structure represents a drm minor number.
662 int index
; /**< Minor device number */
663 int type
; /**< Control or render */
664 struct device
*kdev
; /**< Linux device */
665 struct drm_device
*dev
;
667 struct dentry
*debugfs_root
;
669 struct list_head debugfs_list
;
670 struct mutex debugfs_lock
; /* Protects debugfs_list. */
672 /* currently active master for this node. Protected by master_mutex */
673 struct drm_master
*master
;
674 struct drm_mode_group mode_group
;
678 struct drm_pending_vblank_event
{
679 struct drm_pending_event base
;
681 struct drm_event_vblank event
;
684 struct drm_vblank_crtc
{
685 struct drm_device
*dev
; /* pointer to the drm_device */
686 wait_queue_head_t queue
; /**< VBLANK wait queue */
687 struct timer_list disable_timer
; /* delayed disable timer */
689 /* vblank counter, protected by dev->vblank_time_lock for writes */
691 /* vblank timestamps, protected by dev->vblank_time_lock for writes */
692 struct timeval time
[DRM_VBLANKTIME_RBSIZE
];
694 atomic_t refcount
; /* number of users of vblank interruptsper crtc */
695 u32 last
; /* protected by dev->vbl_lock, used */
696 /* for wraparound handling */
697 u32 last_wait
; /* Last vblank seqno waited per CRTC */
698 unsigned int inmodeset
; /* Display driver is setting mode */
699 int crtc
; /* crtc index */
700 bool enabled
; /* so we don't call enable more than
705 * DRM device structure. This structure represent a complete card that
706 * may contain multiple heads.
709 struct list_head legacy_dev_list
;/**< list of devices per driver for stealth attach cleanup */
710 int if_version
; /**< Highest interface version set */
712 /** \name Lifetime Management */
714 struct kref ref
; /**< Object ref-count */
715 struct device
*dev
; /**< Device structure of bus-device */
716 struct drm_driver
*driver
; /**< DRM driver managing the device */
717 void *dev_private
; /**< DRM driver private data */
718 struct drm_minor
*control
; /**< Control node */
719 struct drm_minor
*primary
; /**< Primary node */
720 struct drm_minor
*render
; /**< Render node */
721 atomic_t unplugged
; /**< Flag whether dev is dead */
722 struct inode
*anon_inode
; /**< inode for private address-space */
723 char *unique
; /**< unique name of the device */
728 struct mutex struct_mutex
; /**< For others */
729 struct mutex master_mutex
; /**< For drm_minor::master and drm_file::is_master */
732 /** \name Usage Counters */
734 int open_count
; /**< Outstanding files open, protected by drm_global_mutex. */
735 spinlock_t buf_lock
; /**< For drm_device::buf_use and a few other things. */
736 int buf_use
; /**< Buffers in use -- cannot alloc */
737 atomic_t buf_alloc
; /**< Buffer allocation in progress */
740 struct list_head filelist
;
742 /** \name Memory management */
744 struct list_head maplist
; /**< Linked list of regions */
745 struct drm_open_hash map_hash
; /**< User token hash table for maps */
747 /** \name Context handle management */
749 struct list_head ctxlist
; /**< Linked list of context handles */
750 struct mutex ctxlist_mutex
; /**< For ctxlist */
754 struct list_head vmalist
; /**< List of vmas (for debugging) */
758 /** \name DMA support */
760 struct drm_device_dma
*dma
; /**< Optional pointer for DMA support */
763 /** \name Context support */
766 __volatile__
long context_flag
; /**< Context swapping flag */
767 int last_context
; /**< Last current context */
770 /** \name VBLANK IRQ support */
776 * At load time, disabling the vblank interrupt won't be allowed since
777 * old clients may not call the modeset ioctl and therefore misbehave.
778 * Once the modeset ioctl *has* been called though, we can safely
779 * disable them when unused.
781 bool vblank_disable_allowed
;
784 * If true, vblank interrupt will be disabled immediately when the
785 * refcount drops to zero, as opposed to via the vblank disable
787 * This can be set to true it the hardware has a working vblank
788 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
791 bool vblank_disable_immediate
;
793 /* array of size num_crtcs */
794 struct drm_vblank_crtc
*vblank
;
796 spinlock_t vblank_time_lock
; /**< Protects vblank count and time updates during vblank enable/disable */
799 u32 max_vblank_count
; /**< size of vblank counter register */
804 struct list_head vblank_event_list
;
805 spinlock_t event_lock
;
809 struct drm_agp_head
*agp
; /**< AGP data */
811 struct pci_dev
*pdev
; /**< PCI device structure */
813 struct pci_controller
*hose
;
816 struct platform_device
*platformdev
; /**< Platform device struture */
818 struct drm_sg_mem
*sg
; /**< Scatter gather memory */
819 unsigned int num_crtcs
; /**< Number of CRTCs on this device */
824 struct drm_hw_lock
*lock
;
827 struct drm_local_map
*agp_buffer_map
;
828 unsigned int agp_buffer_token
;
830 struct drm_mode_config mode_config
; /**< Current mode config */
832 /** \name GEM information */
834 struct mutex object_name_lock
;
835 struct idr object_name_idr
;
836 struct drm_vma_offset_manager
*vma_offset_manager
;
838 int switch_power_state
;
841 #define DRM_SWITCH_POWER_ON 0
842 #define DRM_SWITCH_POWER_OFF 1
843 #define DRM_SWITCH_POWER_CHANGING 2
844 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
846 static __inline__
int drm_core_check_feature(struct drm_device
*dev
,
849 return ((dev
->driver
->driver_features
& feature
) ? 1 : 0);
852 static inline void drm_device_set_unplugged(struct drm_device
*dev
)
855 atomic_set(&dev
->unplugged
, 1);
858 static inline int drm_device_is_unplugged(struct drm_device
*dev
)
860 int ret
= atomic_read(&dev
->unplugged
);
865 static inline bool drm_is_render_client(const struct drm_file
*file_priv
)
867 return file_priv
->minor
->type
== DRM_MINOR_RENDER
;
870 static inline bool drm_is_control_client(const struct drm_file
*file_priv
)
872 return file_priv
->minor
->type
== DRM_MINOR_CONTROL
;
875 static inline bool drm_is_primary_client(const struct drm_file
*file_priv
)
877 return file_priv
->minor
->type
== DRM_MINOR_LEGACY
;
880 /******************************************************************/
881 /** \name Internal function definitions */
884 /* Driver support (drm_drv.h) */
885 extern long drm_ioctl(struct file
*filp
,
886 unsigned int cmd
, unsigned long arg
);
887 extern long drm_compat_ioctl(struct file
*filp
,
888 unsigned int cmd
, unsigned long arg
);
889 extern bool drm_ioctl_flags(unsigned int nr
, unsigned int *flags
);
891 /* Device support (drm_fops.h) */
892 extern int drm_open(struct inode
*inode
, struct file
*filp
);
893 extern ssize_t
drm_read(struct file
*filp
, char __user
*buffer
,
894 size_t count
, loff_t
*offset
);
895 extern int drm_release(struct inode
*inode
, struct file
*filp
);
897 /* Mapping support (drm_vm.h) */
898 extern unsigned int drm_poll(struct file
*filp
, struct poll_table_struct
*wait
);
900 /* Misc. IOCTL support (drm_ioctl.c) */
901 int drm_noop(struct drm_device
*dev
, void *data
,
902 struct drm_file
*file_priv
);
904 /* Cache management (drm_cache.c) */
905 void drm_clflush_pages(struct page
*pages
[], unsigned long num_pages
);
906 void drm_clflush_sg(struct sg_table
*st
);
907 void drm_clflush_virt_range(void *addr
, unsigned long length
);
910 * These are exported to drivers so that they can implement fencing using
911 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
914 /* IRQ support (drm_irq.h) */
915 extern int drm_irq_install(struct drm_device
*dev
, int irq
);
916 extern int drm_irq_uninstall(struct drm_device
*dev
);
918 extern int drm_vblank_init(struct drm_device
*dev
, int num_crtcs
);
919 extern int drm_wait_vblank(struct drm_device
*dev
, void *data
,
920 struct drm_file
*filp
);
921 extern u32
drm_vblank_count(struct drm_device
*dev
, int crtc
);
922 extern u32
drm_crtc_vblank_count(struct drm_crtc
*crtc
);
923 extern u32
drm_vblank_count_and_time(struct drm_device
*dev
, int crtc
,
924 struct timeval
*vblanktime
);
925 extern void drm_send_vblank_event(struct drm_device
*dev
, int crtc
,
926 struct drm_pending_vblank_event
*e
);
927 extern void drm_crtc_send_vblank_event(struct drm_crtc
*crtc
,
928 struct drm_pending_vblank_event
*e
);
929 extern bool drm_handle_vblank(struct drm_device
*dev
, int crtc
);
930 extern bool drm_crtc_handle_vblank(struct drm_crtc
*crtc
);
931 extern int drm_vblank_get(struct drm_device
*dev
, int crtc
);
932 extern void drm_vblank_put(struct drm_device
*dev
, int crtc
);
933 extern int drm_crtc_vblank_get(struct drm_crtc
*crtc
);
934 extern void drm_crtc_vblank_put(struct drm_crtc
*crtc
);
935 extern void drm_wait_one_vblank(struct drm_device
*dev
, int crtc
);
936 extern void drm_crtc_wait_one_vblank(struct drm_crtc
*crtc
);
937 extern void drm_vblank_off(struct drm_device
*dev
, int crtc
);
938 extern void drm_vblank_on(struct drm_device
*dev
, int crtc
);
939 extern void drm_crtc_vblank_off(struct drm_crtc
*crtc
);
940 extern void drm_crtc_vblank_reset(struct drm_crtc
*crtc
);
941 extern void drm_crtc_vblank_on(struct drm_crtc
*crtc
);
942 extern void drm_vblank_cleanup(struct drm_device
*dev
);
944 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device
*dev
,
945 int crtc
, int *max_error
,
946 struct timeval
*vblank_time
,
948 const struct drm_crtc
*refcrtc
,
949 const struct drm_display_mode
*mode
);
950 extern void drm_calc_timestamping_constants(struct drm_crtc
*crtc
,
951 const struct drm_display_mode
*mode
);
954 * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
955 * @crtc: which CRTC's vblank waitqueue to retrieve
957 * This function returns a pointer to the vblank waitqueue for the CRTC.
958 * Drivers can use this to implement vblank waits using wait_event() & co.
960 static inline wait_queue_head_t
*drm_crtc_vblank_waitqueue(struct drm_crtc
*crtc
)
962 return &crtc
->dev
->vblank
[drm_crtc_index(crtc
)].queue
;
965 /* Modesetting support */
966 extern void drm_vblank_pre_modeset(struct drm_device
*dev
, int crtc
);
967 extern void drm_vblank_post_modeset(struct drm_device
*dev
, int crtc
);
969 /* Stub support (drm_stub.h) */
970 extern struct drm_master
*drm_master_get(struct drm_master
*master
);
971 extern void drm_master_put(struct drm_master
**master
);
973 extern void drm_put_dev(struct drm_device
*dev
);
974 extern void drm_unplug_dev(struct drm_device
*dev
);
975 extern unsigned int drm_debug
;
976 extern bool drm_atomic
;
978 /* Debugfs support */
979 #if defined(CONFIG_DEBUG_FS)
980 extern int drm_debugfs_create_files(const struct drm_info_list
*files
,
981 int count
, struct dentry
*root
,
982 struct drm_minor
*minor
);
983 extern int drm_debugfs_remove_files(const struct drm_info_list
*files
,
984 int count
, struct drm_minor
*minor
);
986 static inline int drm_debugfs_create_files(const struct drm_info_list
*files
,
987 int count
, struct dentry
*root
,
988 struct drm_minor
*minor
)
993 static inline int drm_debugfs_remove_files(const struct drm_info_list
*files
,
994 int count
, struct drm_minor
*minor
)
1000 extern struct dma_buf
*drm_gem_prime_export(struct drm_device
*dev
,
1001 struct drm_gem_object
*obj
, int flags
);
1002 extern int drm_gem_prime_handle_to_fd(struct drm_device
*dev
,
1003 struct drm_file
*file_priv
, uint32_t handle
, uint32_t flags
,
1005 extern struct drm_gem_object
*drm_gem_prime_import(struct drm_device
*dev
,
1006 struct dma_buf
*dma_buf
);
1007 extern int drm_gem_prime_fd_to_handle(struct drm_device
*dev
,
1008 struct drm_file
*file_priv
, int prime_fd
, uint32_t *handle
);
1009 extern void drm_gem_dmabuf_release(struct dma_buf
*dma_buf
);
1011 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table
*sgt
, struct page
**pages
,
1012 dma_addr_t
*addrs
, int max_pages
);
1013 extern struct sg_table
*drm_prime_pages_to_sg(struct page
**pages
, unsigned int nr_pages
);
1014 extern void drm_prime_gem_destroy(struct drm_gem_object
*obj
, struct sg_table
*sg
);
1017 extern struct drm_dma_handle
*drm_pci_alloc(struct drm_device
*dev
, size_t size
,
1019 extern void drm_pci_free(struct drm_device
*dev
, struct drm_dma_handle
* dmah
);
1021 /* sysfs support (drm_sysfs.c) */
1022 extern void drm_sysfs_hotplug_event(struct drm_device
*dev
);
1025 struct drm_device
*drm_dev_alloc(struct drm_driver
*driver
,
1026 struct device
*parent
);
1027 void drm_dev_ref(struct drm_device
*dev
);
1028 void drm_dev_unref(struct drm_device
*dev
);
1029 int drm_dev_register(struct drm_device
*dev
, unsigned long flags
);
1030 void drm_dev_unregister(struct drm_device
*dev
);
1031 int drm_dev_set_unique(struct drm_device
*dev
, const char *fmt
, ...);
1033 struct drm_minor
*drm_minor_acquire(unsigned int minor_id
);
1034 void drm_minor_release(struct drm_minor
*minor
);
1039 static __inline__
int drm_pci_device_is_agp(struct drm_device
*dev
)
1041 if (dev
->driver
->device_is_agp
!= NULL
) {
1042 int err
= (*dev
->driver
->device_is_agp
) (dev
);
1049 return pci_find_capability(dev
->pdev
, PCI_CAP_ID_AGP
);
1051 void drm_pci_agp_destroy(struct drm_device
*dev
);
1053 extern int drm_pci_init(struct drm_driver
*driver
, struct pci_driver
*pdriver
);
1054 extern void drm_pci_exit(struct drm_driver
*driver
, struct pci_driver
*pdriver
);
1056 extern int drm_get_pci_dev(struct pci_dev
*pdev
,
1057 const struct pci_device_id
*ent
,
1058 struct drm_driver
*driver
);
1059 extern int drm_pci_set_busid(struct drm_device
*dev
, struct drm_master
*master
);
1061 static inline int drm_get_pci_dev(struct pci_dev
*pdev
,
1062 const struct pci_device_id
*ent
,
1063 struct drm_driver
*driver
)
1068 static inline int drm_pci_set_busid(struct drm_device
*dev
,
1069 struct drm_master
*master
)
1075 #define DRM_PCIE_SPEED_25 1
1076 #define DRM_PCIE_SPEED_50 2
1077 #define DRM_PCIE_SPEED_80 4
1079 extern int drm_pcie_get_speed_cap_mask(struct drm_device
*dev
, u32
*speed_mask
);
1081 /* platform section */
1082 extern int drm_platform_init(struct drm_driver
*driver
, struct platform_device
*platform_device
);
1083 extern int drm_platform_set_busid(struct drm_device
*d
, struct drm_master
*m
);
1085 /* returns true if currently okay to sleep */
1086 static __inline__
bool drm_can_sleep(void)
1088 if (in_atomic() || in_dbg_master() || irqs_disabled())