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 #if defined(_KERNEL) || defined(__KERNEL__)
37 #include <sys/param.h>
38 #include <sys/queue.h>
39 #include <sys/malloc.h>
40 #include <sys/kernel.h>
42 #include <sys/module.h>
43 #include <sys/systm.h>
44 #include <sys/device.h>
45 #include <sys/sglist.h>
50 #include <sys/spinlock.h>
51 #include <sys/spinlock2.h>
52 #include <sys/fcntl.h>
54 #include <sys/filio.h>
55 #include <sys/sysctl.h>
57 #include <sys/signalvar.h>
59 #include <linux/highmem.h>
61 #include <sys/taskqueue.h>
65 #include <vm/vm_extern.h>
66 #include <vm/vm_kern.h>
67 #include <vm/vm_map.h>
68 #include <vm/vm_object.h>
69 #include <vm/vm_page2.h>
70 #include <vm/vm_pager.h>
71 #include <vm/vm_param.h>
72 #include <machine/param.h>
73 #include <machine/pmap.h>
75 #include <machine/specialreg.h>
77 #include <machine/sysarch.h>
78 #include <sys/endian.h>
81 #include <sys/memrange.h>
82 #include <sys/mutex.h>
84 #include <linux/agp_backend.h>
85 #include <linux/atomic.h>
86 #include <linux/bug.h>
87 #include <linux/dma-mapping.h>
88 #include <linux/capability.h>
89 #include <linux/err.h>
90 #include <linux/idr.h>
91 #include <linux/pci.h>
92 #include <linux/jiffies.h>
93 #include <linux/kernel.h>
95 #include <linux/kref.h>
96 #include <linux/list.h>
98 #include <linux/moduleparam.h>
99 #include <linux/mutex.h>
100 #include <linux/slab.h>
101 #include <linux/scatterlist.h>
102 #include <linux/timer.h>
104 #include <linux/seq_file.h>
105 #include <linux/types.h>
106 #include <linux/vmalloc.h>
107 #include <linux/wait.h>
108 #include <linux/workqueue.h>
110 #include <asm/uaccess.h>
112 #include <uapi_drm/drm.h>
113 #include <uapi_drm/drm_mode.h>
115 #include <drm/drm_agpsupport.h>
116 #include <drm/drm_crtc.h>
117 #include <drm/drm_global.h>
118 #include <drm/drm_hashtab.h>
119 #include <drm/drm_mem_util.h>
120 #include <drm/drm_mm.h>
121 #include <drm/drm_os_linux.h>
122 #include <uapi_drm/drm_sarea.h>
123 #include <drm/drm_vma_manager.h>
128 struct drm_local_map;
129 struct drm_device_dma;
130 struct drm_dma_handle;
131 struct drm_gem_object;
134 #ifdef CONFIG_VIDEOMODE_HELPERS
135 struct videomode; /* XXX empty struct in videomode.h ? */
137 struct reservation_object;
138 struct dma_buf_attachment;
141 * 4 debug categories are defined:
143 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
144 * This is the category used by the DRM_DEBUG() macro.
146 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
147 * This is the category used by the DRM_DEBUG_DRIVER() macro.
149 * KMS: used in the modesetting code.
150 * This is the category used by the DRM_DEBUG_KMS() macro.
152 * PRIME: used in the prime code.
153 * This is the category used by the DRM_DEBUG_PRIME() macro.
155 * ATOMIC: used in the atomic code.
156 * This is the category used by the DRM_DEBUG_ATOMIC() macro.
159 * PID: used as modifier to include PID number in messages.
160 * This is the category used by the all debug macros.
162 * FIOCTL: used in failed ioctl debugging.
163 * This is the category used by the DRM_DEBUG_FIOCTL() macro.
165 * IOCTL: used in ioctl debugging.
166 * This is the category used by the DRM_DEBUG_IOCTL() macro.
168 * VBLANK: used in vblank debugging.
169 * This is the category used by the DRM_DEBUG_VBLANK() macro.
171 * Enabling verbose debug messages is done through the drm.debug parameter,
172 * each category being enabled by a bit.
174 * drm.debug=0x1 will enable CORE messages
175 * drm.debug=0x2 will enable DRIVER messages
176 * drm.debug=0x3 will enable CORE and DRIVER messages
178 * drm.debug=0xf will enable all messages
180 * An interesting feature is that it's possible to enable verbose logging at
181 * run-time by using hw.drm.debug sysctl variable:
182 * # sysctl hw.drm.debug=0xfff
184 #define DRM_UT_CORE 0x01
185 #define DRM_UT_DRIVER 0x02
186 #define DRM_UT_KMS 0x04
187 #define DRM_UT_PRIME 0x08
188 #define DRM_UT_ATOMIC 0x10
189 #define DRM_UT_VBL 0x20
190 /* Extra DragonFly debug categories */
192 #define DRM_UT_RES7 0x40 /* reserved for future expansion */
193 #define DRM_UT_RES8 0x80 /* reserved for future expansion */
194 #define DRM_UT_PID 0x100
195 #define DRM_UT_FIOCTL 0x200
196 #define DRM_UT_IOCTL 0x400
197 #define DRM_UT_VBLANK 0x800
200 extern __printflike(2, 3)
201 void drm_ut_debug_printk(const char *function_name,
202 const char *format, ...);
203 extern __printflike(2, 3)
204 void drm_err(const char *func, const char *format, ...);
206 /***********************************************************************/
207 /** \name DRM template customization defaults */
210 /* driver capabilities and requirements mask */
211 #define DRIVER_USE_AGP 0x1
212 #define DRIVER_PCI_DMA 0x8
213 #define DRIVER_SG 0x10
214 #define DRIVER_HAVE_DMA 0x20
215 #define DRIVER_HAVE_IRQ 0x40
216 #define DRIVER_IRQ_SHARED 0x80
217 #define DRIVER_GEM 0x1000
218 #define DRIVER_MODESET 0x2000
219 #define DRIVER_PRIME 0x4000
220 #define DRIVER_RENDER 0x8000
221 #define DRIVER_ATOMIC 0x10000
222 #define DRIVER_KMS_LEGACY_CONTEXT 0x20000
224 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
226 /***********************************************************************/
227 /** \name Macros to make printk easier */
233 * \param fmt printf() like format string.
234 * \param arg arguments
236 #define DRM_ERROR(fmt, ...) \
237 drm_err(__func__, fmt, ##__VA_ARGS__)
240 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
242 * \param fmt printf() like format string.
243 * \param arg arguments
245 #define DRM_ERROR_RATELIMITED(fmt, ...) \
247 static struct krate krate_derr = { .freq = 1, .count = -16 }; \
249 krateprintf(&krate_derr, "error: [" DRM_NAME ":%s] *ERROR* " \
250 fmt, __func__, ##__VA_ARGS__); \
253 #define DRM_INFO(fmt, ...) \
254 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
256 #define DRM_INFO_ONCE(fmt, ...) \
257 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
262 * \param fmt printf() like format string.
263 * \param arg arguments
265 #define DRM_DEBUG(fmt, args...) \
267 if (unlikely(drm_debug & DRM_UT_CORE)) \
268 drm_ut_debug_printk(__func__, fmt, ##args); \
271 #define DRM_DEBUG_DRIVER(fmt, args...) \
273 if (unlikely(drm_debug & DRM_UT_DRIVER)) \
274 drm_ut_debug_printk(__func__, fmt, ##args); \
276 #define DRM_DEBUG_KMS(fmt, args...) \
278 if (unlikely(drm_debug & DRM_UT_KMS)) \
279 drm_ut_debug_printk(__func__, fmt, ##args); \
281 #define DRM_DEBUG_PRIME(fmt, args...) \
283 if (unlikely(drm_debug & DRM_UT_PRIME)) \
284 drm_ut_debug_printk(__func__, fmt, ##args); \
286 #define DRM_DEBUG_ATOMIC(fmt, args...) \
288 if (unlikely(drm_debug & DRM_UT_ATOMIC)) \
289 drm_ut_debug_printk(__func__, fmt, ##args); \
293 #define DRM_DEBUG_FIOCTL(fmt, args...) \
295 if (unlikely(drm_debug & DRM_UT_FIOCTL)) \
296 drm_ut_debug_printk(__func__, fmt, ##args); \
298 #define DRM_DEBUG_IOCTL(fmt, args...) \
300 if (unlikely(drm_debug & DRM_UT_IOCTL)) \
301 drm_ut_debug_printk(__func__, fmt, ##args); \
303 #define DRM_DEBUG_VBLANK(fmt, args...) \
305 if (unlikely(drm_debug & DRM_UT_VBLANK)) \
306 drm_ut_debug_printk(__func__, fmt, ##args); \
308 #define DRM_DEBUG_VBL(fmt, args...) \
310 if (unlikely(drm_debug & DRM_UT_VBL)) \
311 drm_ut_debug_printk(__func__, fmt, ##args); \
317 /***********************************************************************/
318 /** \name Internal types and structures */
321 SYSCTL_DECL(_hw_drm);
323 #define DRM_MAX(a,b) ((a)>(b)?(a):(b))
325 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
327 #define DRM_DEV_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
328 #define DRM_DEV_UID UID_ROOT
329 #define DRM_DEV_GID GID_WHEEL
331 #define DRM_CURPROC curthread
332 #define DRM_STRUCTPROC struct thread
333 #define DRM_LOCK(dev) lockmgr(&(dev)->struct_mutex, LK_EXCLUSIVE)
334 #define DRM_UNLOCK(dev) lockmgr(&(dev)->struct_mutex, LK_RELEASE)
335 #define DRM_LOCK_SLEEP(dev, chan, flags, msg, timeout) \
336 (lksleep((chan), &(dev)->struct_mutex, (flags), (msg), (timeout)))
337 #if defined(INVARIANTS)
338 #define DRM_LOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) != 0);
339 #define DRM_UNLOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) == 0);
341 #define DRM_LOCK_ASSERT(d)
342 #define DRM_UNLOCK_ASSERT(d)
345 #define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)
347 #define drm_get_device_from_kdev(_kdev) (_kdev->si_drv1)
349 #define DRM_MTRR_WC MDF_WRITECOMBINE
351 int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
352 vm_memattr_t memattr);
353 void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
354 vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);
357 int drm_mtrr_add(unsigned long offset, size_t size, int flags);
358 int drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags);
360 typedef struct drm_pci_id_list
369 * Ioctl function type.
371 * \param inode device inode.
372 * \param file_priv DRM file private pointer.
373 * \param cmd command.
374 * \param arg argument.
376 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
377 struct drm_file *file_priv);
379 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
382 #define DRM_IOCTL_NR(n) ((n) & 0xff)
385 #define DRM_MASTER 0x2
386 #define DRM_ROOT_ONLY 0x4
387 #define DRM_CONTROL_ALLOW 0x8
388 #define DRM_UNLOCKED 0x10
389 #define DRM_RENDER_ALLOW 0x20
391 struct drm_ioctl_desc {
395 unsigned int cmd_drv;
400 * Creates a driver or general drm_ioctl_desc array entry for the given
401 * ioctl, for use by drm_ioctl().
404 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
405 [DRM_IOCTL_NR(DRM_##ioctl)] = { \
406 .cmd = DRM_##ioctl, \
409 .cmd_drv = DRM_IOCTL_##ioctl, \
413 typedef struct drm_magic_entry {
414 struct list_head head;
415 struct drm_hash_item hash_item;
416 struct drm_file *priv;
417 struct drm_magic_entry *next;
420 /* Event queued up for userspace to read */
421 struct drm_pending_event {
422 struct drm_event *event;
423 struct list_head link;
424 struct list_head pending_link;
425 struct drm_file *file_priv;
426 pid_t pid; /* pid of requester, no guarantee it's valid by the time
427 we deliver the event, for tracing only */
428 void (*destroy)(struct drm_pending_event *event);
431 /* initial implementaton using a linked list - todo hashtab */
432 struct drm_prime_file_private {
433 struct list_head head;
437 /** File private data */
439 unsigned authenticated :1;
440 /* Whether we're master for a minor. Protected by master_mutex */
441 unsigned is_master :1;
443 /* true when the client has asked us to expose stereo 3D mode flags */
444 unsigned stereo_allowed :1;
446 * true if client understands CRTC primary planes and cursor planes
449 unsigned universal_planes:1;
450 /* true if client understands atomic properties */
456 struct list_head lhead;
457 unsigned long lock_count;
461 /** Mapping of mm object handles to object pointers. */
462 struct idr object_idr;
463 /** Lock for synchronization of access to object_idr. */
464 struct lock table_lock;
469 struct drm_master *masterp;
472 * fbs - List of framebuffers associated with this file.
474 * Protected by fbs_lock. Note that the fbs list holds a reference on
475 * the fb object to prevent it from untimely disappearing.
477 struct list_head fbs;
478 struct lock fbs_lock;
480 /** User-created blob properties; this retains a reference on the
482 struct list_head blobs;
484 wait_queue_head_t event_wait;
485 struct list_head pending_event_list;
486 struct list_head event_list;
489 struct lock event_read_lock;
491 struct drm_prime_file_private prime;
494 struct drm_device *dev;
496 unsigned long ioctl_count;
503 struct drm_lock_data {
504 struct drm_hw_lock *hw_lock; /**< Hardware lock */
505 /** Private of lock holder's file (NULL=kernel) */
506 struct drm_file *file_priv;
507 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
508 unsigned long lock_time; /**< Time of last lock in jiffies */
512 * GEM specific mm private for tracking GEM objects
515 struct drm_vma_offset_manager vma_manager;
516 struct drm_mm offset_manager; /**< Offset mgmt for buffer objects */
517 struct drm_open_hash offset_hash; /**< User token hash table for maps */
518 struct unrhdr *idxunr;
522 * struct drm_master - drm master structure
524 * @refcount: Refcount for this master object.
525 * @minor: Link back to minor char device we are master for. Immutable.
526 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
527 * @unique_len: Length of unique field. Protected by drm_global_mutex.
528 * @magic_map: Map of used authentication tokens. Protected by struct_mutex.
529 * @lock: DRI lock information.
530 * @driver_priv: Pointer to driver-private information.
533 struct kref refcount; /* refcount for this master */
534 struct list_head head; /**< each minor contains a list of masters */
535 struct drm_minor *minor; /**< link back to minor we are a master for */
536 char *unique; /**< Unique identifier: e.g., busid */
537 int unique_len; /**< Length of unique field */
538 int unique_size; /**< amount allocated */
539 int blocked; /**< Blocked due to VC switch? */
540 struct idr magic_map;
541 struct drm_lock_data lock;
545 /* Size of ringbuffer for vblank timestamps. Just double-buffer
546 * in initial implementation.
548 #define DRM_VBLANKTIME_RBSIZE 2
550 /* Flags and return codes for get_vblank_timestamp() driver function. */
551 #define DRM_CALLED_FROM_VBLIRQ 1
552 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
553 #define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
555 /* get_scanout_position() return flags */
556 #define DRM_SCANOUTPOS_VALID (1 << 0)
557 #define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
558 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
561 * DRM driver structure. This structure represent the common code for
562 * a family of cards. There will one drm_device for each card present
566 int (*load) (struct drm_device *, unsigned long flags);
567 int (*firstopen) (struct drm_device *);
568 int (*open) (struct drm_device *, struct drm_file *);
569 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
570 void (*postclose) (struct drm_device *, struct drm_file *);
571 void (*lastclose) (struct drm_device *);
572 int (*unload) (struct drm_device *);
573 int (*suspend) (struct drm_device *, pm_message_t state);
574 int (*resume) (struct drm_device *);
575 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
576 int (*dma_quiescent) (struct drm_device *);
577 int (*context_dtor) (struct drm_device *dev, int context);
578 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
581 * get_vblank_counter - get raw hardware vblank counter
583 * @pipe: counter to fetch
585 * Driver callback for fetching a raw hardware vblank counter for @crtc.
586 * If a device doesn't have a hardware counter, the driver can simply
587 * return the value of drm_vblank_count. The DRM core will account for
588 * missed vblank events while interrupts where disabled based on system
591 * Wraparound handling and loss of events due to modesetting is dealt
592 * with in the DRM core code.
595 * Raw vblank counter value.
597 u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe);
600 * enable_vblank - enable vblank interrupt events
602 * @pipe: which irq to enable
604 * Enable vblank interrupts for @crtc. If the device doesn't have
605 * a hardware vblank counter, this routine should be a no-op, since
606 * interrupts will have to stay on to keep the count accurate.
609 * Zero on success, appropriate errno if the given @crtc's vblank
610 * interrupt cannot be enabled.
612 int (*enable_vblank) (struct drm_device *dev, unsigned int pipe);
615 * disable_vblank - disable vblank interrupt events
617 * @pipe: which irq to enable
619 * Disable vblank interrupts for @crtc. If the device doesn't have
620 * a hardware vblank counter, this routine should be a no-op, since
621 * interrupts will have to stay on to keep the count accurate.
623 void (*disable_vblank) (struct drm_device *dev, unsigned int pipe);
626 * Called by \c drm_device_is_agp. Typically used to determine if a
627 * card is really attached to AGP or not.
629 * \param dev DRM device handle
632 * One of three values is returned depending on whether or not the
633 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
634 * (return of 1), or may or may not be AGP (return of 2).
636 int (*device_is_agp) (struct drm_device *dev);
639 * Called by vblank timestamping code.
641 * Return the current display scanout position from a crtc, and an
642 * optional accurate ktime_get timestamp of when position was measured.
644 * \param dev DRM device.
645 * \param pipe Id of the crtc to query.
646 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
647 * \param *vpos Target location for current vertical scanout position.
648 * \param *hpos Target location for current horizontal scanout position.
649 * \param *stime Target location for timestamp taken immediately before
650 * scanout position query. Can be NULL to skip timestamp.
651 * \param *etime Target location for timestamp taken immediately after
652 * scanout position query. Can be NULL to skip timestamp.
653 * \param mode Current display timings.
655 * Returns vpos as a positive number while in active scanout area.
656 * Returns vpos as a negative number inside vblank, counting the number
657 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
658 * until start of active scanout / end of vblank."
660 * \return Flags, or'ed together as follows:
662 * DRM_SCANOUTPOS_VALID = Query successful.
663 * DRM_SCANOUTPOS_INVBL = Inside vblank.
664 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
665 * this flag means that returned position may be offset by a constant
666 * but unknown small number of scanlines wrt. real scanout position.
669 int (*get_scanout_position) (struct drm_device *dev, unsigned int pipe,
670 unsigned int flags, int *vpos, int *hpos,
671 ktime_t *stime, ktime_t *etime,
672 const struct drm_display_mode *mode);
675 * Called by \c drm_get_last_vbltimestamp. Should return a precise
676 * timestamp when the most recent VBLANK interval ended or will end.
678 * Specifically, the timestamp in @vblank_time should correspond as
679 * closely as possible to the time when the first video scanline of
680 * the video frame after the end of VBLANK will start scanning out,
681 * the time immediately after end of the VBLANK interval. If the
682 * @crtc is currently inside VBLANK, this will be a time in the future.
683 * If the @crtc is currently scanning out a frame, this will be the
684 * past start time of the current scanout. This is meant to adhere
685 * to the OpenML OML_sync_control extension specification.
687 * \param dev dev DRM device handle.
688 * \param pipe crtc for which timestamp should be returned.
689 * \param *max_error Maximum allowable timestamp error in nanoseconds.
690 * Implementation should strive to provide timestamp
691 * with an error of at most *max_error nanoseconds.
692 * Returns true upper bound on error for timestamp.
693 * \param *vblank_time Target location for returned vblank timestamp.
694 * \param flags 0 = Defaults, no special treatment needed.
695 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
696 * irq handler. Some drivers need to apply some workarounds
697 * for gpu-specific vblank irq quirks if flag is set.
700 * Zero if timestamping isn't supported in current display mode or a
701 * negative number on failure. A positive status code on success,
702 * which describes how the vblank_time timestamp was computed.
704 int (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe,
706 struct timeval *vblank_time,
709 /* these have to be filled in */
711 irqreturn_t(*irq_handler) (int irq, void *arg);
712 void (*irq_preinstall) (struct drm_device *dev);
713 int (*irq_postinstall) (struct drm_device *dev);
714 void (*irq_uninstall) (struct drm_device *dev);
716 /* Master routines */
717 int (*master_create)(struct drm_device *dev, struct drm_master *master);
718 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
720 * master_set is called whenever the minor master is set.
721 * master_drop is called whenever the minor master is dropped.
724 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
726 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
729 int (*debugfs_init)(struct drm_minor *minor);
730 void (*debugfs_cleanup)(struct drm_minor *minor);
733 * @gem_free_object: deconstructor for drm_gem_objects
735 * This is deprecated and should not be used by new drivers. Use
736 * @gem_free_object_unlocked instead.
738 void (*gem_free_object) (struct drm_gem_object *obj);
741 * @gem_free_object_unlocked: deconstructor for drm_gem_objects
743 * This is for drivers which are not encumbered with dev->struct_mutex
744 * legacy locking schemes. Use this hook instead of @gem_free_object.
746 void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
748 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
749 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
752 * Hook for allocating the GEM object struct, for use by core
755 struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
759 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
760 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
761 uint32_t handle, uint32_t flags, int *prime_fd);
762 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
763 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
764 int prime_fd, uint32_t *handle);
765 /* export GEM -> dmabuf */
766 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
767 struct drm_gem_object *obj, int flags);
768 /* import dmabuf -> GEM */
769 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
770 struct dma_buf *dma_buf);
771 /* low-level interface used by drm_gem_prime_{import,export} */
772 int (*gem_prime_pin)(struct drm_gem_object *obj);
773 void (*gem_prime_unpin)(struct drm_gem_object *obj);
774 struct reservation_object * (*gem_prime_res_obj)(
775 struct drm_gem_object *obj);
776 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
777 struct drm_gem_object *(*gem_prime_import_sg_table)(
778 struct drm_device *dev,
779 struct dma_buf_attachment *attach,
780 struct sg_table *sgt);
781 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
782 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
783 int (*gem_prime_mmap)(struct drm_gem_object *obj,
784 struct vm_area_struct *vma);
786 /* vga arb irq handler */
787 void (*vgaarb_irq)(struct drm_device *dev, bool state);
789 /* dumb alloc support */
790 int (*dumb_create)(struct drm_file *file_priv,
791 struct drm_device *dev,
792 struct drm_mode_create_dumb *args);
793 int (*dumb_map_offset)(struct drm_file *file_priv,
794 struct drm_device *dev, uint32_t handle,
796 int (*dumb_destroy)(struct drm_file *file_priv,
797 struct drm_device *dev,
800 /* Driver private ops for this object */
801 struct cdev_pager_ops *gem_vm_ops;
812 const struct drm_ioctl_desc *ioctls;
814 const struct file_operations *fops;
816 /* List of devices hanging off this driver with stealth attach. */
817 struct list_head legacy_dev_list;
819 int (*sysctl_init) (struct drm_device *dev,
820 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
821 void (*sysctl_cleanup) (struct drm_device *dev);
822 #endif /* __DragonFly__ */
825 enum drm_minor_type {
833 * Info file list entry. This structure represents a debugfs or proc file to
834 * be created by the drm core
836 struct drm_info_list {
837 const char *name; /** file name */
838 int (*show)(struct seq_file*, void*); /** show callback */
839 u32 driver_features; /**< Required driver features for this entry */
844 * debugfs node structure. This structure represents a debugfs file.
846 struct drm_info_node {
847 struct list_head list;
848 struct drm_minor *minor;
849 const struct drm_info_list *info_ent;
854 * DRM minor structure. This structure represents a drm minor number.
857 int index; /**< Minor device number */
858 int type; /**< Control or render */
859 struct device *kdev; /**< Linux device */
860 struct drm_device *dev;
862 /* currently active master for this node. Protected by master_mutex */
863 struct drm_master *master;
866 struct drm_pending_vblank_event {
867 struct drm_pending_event base;
869 struct drm_event_vblank event;
872 struct drm_vblank_crtc {
873 struct drm_device *dev; /* pointer to the drm_device */
874 wait_queue_head_t queue; /**< VBLANK wait queue */
875 struct timer_list disable_timer; /* delayed disable timer */
877 /* vblank counter, protected by dev->vblank_time_lock for writes */
879 /* vblank timestamps, protected by dev->vblank_time_lock for writes */
880 struct timeval time[DRM_VBLANKTIME_RBSIZE];
882 atomic_t refcount; /* number of users of vblank interruptsper crtc */
883 u32 last; /* protected by dev->vbl_lock, used */
884 /* for wraparound handling */
885 u32 last_wait; /* Last vblank seqno waited per CRTC */
886 unsigned int inmodeset; /* Display driver is setting mode */
887 unsigned int pipe; /* crtc index */
888 int framedur_ns; /* frame/field duration in ns */
889 int linedur_ns; /* line duration in ns */
890 int pixeldur_ns; /* pixel duration in ns */
891 bool enabled; /* so we don't call enable more than
895 struct drm_sysctl_info {
896 struct sysctl_ctx_list ctx;
900 /* Length for the array of resource pointers for drm_get_resource_*. */
901 #define DRM_MAX_PCI_RESOURCE 6
904 * DRM device structure. This structure represent a complete card that
905 * may contain multiple heads.
908 drm_pci_id_list_t *id_entry; /* PCI ID, name, and chipset private */
910 char *unique; /* Unique identifier: e.g., busid */
911 int unique_len; /* Length of unique field */
912 struct cdev *devnode; /* Device number for mknod */
913 int if_version; /* Highest interface version set */
915 int flags; /* Flags to open(2) */
918 struct lwkt_serialize irq_lock; /* protects irq condition checks */
919 struct lock dev_lock; /* protects everything else */
923 struct lock struct_mutex; /**< For others */
924 struct lock master_mutex; /**< For drm_minor::master */
927 /** \name Usage Counters */
929 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
930 struct spinlock buf_lock; /**< For drm_device::buf_use and a few other things. */
931 int buf_use; /**< Buffers in use -- cannot alloc */
932 atomic_t buf_alloc; /**< Buffer allocation in progress */
936 /** \name Performance counters */
938 unsigned long counters;
939 enum drm_stat_type types[15];
944 struct idr magic_map;
946 struct lock filelist_mutex;
947 struct list_head filelist;
949 /** \name Memory management */
951 struct list_head maplist; /**< Linked list of regions */
952 int map_count; /**< Number of mappable regions */
953 struct drm_open_hash map_hash; /**< User token hash table for maps */
955 /** \name Context handle management */
957 struct list_head ctxlist; /**< Linked list of context handles */
958 struct lock ctxlist_mutex; /**< For ctxlist */
964 struct drm_lock_data lock; /* Information on hardware lock */
966 /** \name DMA support */
968 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
971 /* Storage of resource pointers for drm_get_resource_* */
972 struct resource *pcir[DRM_MAX_PCI_RESOURCE];
973 int pcirid[DRM_MAX_PCI_RESOURCE];
980 /** \name Context support */
983 __volatile__ long context_flag; /**< Context swapping flag */
984 __volatile__ long interrupt_flag; /**< Interruption handler flag */
985 __volatile__ long dma_flag; /**< DMA dispatch flag */
986 wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
987 int last_checked; /**< Last context checked for DMA */
988 int last_context; /**< Last current context */
989 unsigned long last_switch; /**< jiffies at last context switch */
992 /** \name VBLANK IRQ support */
994 int irq_enabled; /**< True if irq handler is enabled */
995 int irq; /* Interrupt used by board */
998 * If true, vblank interrupt will be disabled immediately when the
999 * refcount drops to zero, as opposed to via the vblank disable
1001 * This can be set to true it the hardware has a working vblank
1002 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
1005 bool vblank_disable_immediate;
1007 /* array of size num_crtcs */
1008 struct drm_vblank_crtc *vblank;
1010 struct lock vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1011 struct lock vbl_lock;
1012 struct timer_list vblank_disable_timer;
1014 u32 max_vblank_count; /**< size of vblank counter register */
1019 struct list_head vblank_event_list;
1020 struct lock event_lock;
1024 struct sigio *buf_sigio; /* Processes waiting for SIGIO */
1026 /* Sysctl support */
1027 struct drm_sysctl_info *sysctl;
1030 struct drm_sg_mem *sg; /**< Scatter gather memory */
1031 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1033 unsigned long *ctx_bitmap;
1042 struct drm_hw_lock *lock;
1045 struct drm_agp_head *agp; /**< AGP data */
1047 struct device *dev; /**< Device structure */
1048 struct pci_dev *pdev; /**< PCI device structure */
1050 struct drm_driver *driver;
1051 struct drm_local_map *agp_buffer_map;
1052 unsigned int agp_buffer_token;
1053 struct drm_minor *control; /**< Control node for card */
1054 struct drm_minor *primary; /**< render type primary screen head */
1056 struct drm_mode_config mode_config; /**< Current mode config */
1058 /** \name GEM information */
1060 struct lock object_name_lock;
1061 struct idr object_name_idr;
1065 void *sysctl_private;
1066 char busid_str[128];
1069 int switch_power_state;
1071 #ifdef __DragonFly__
1072 atomic_t unplugged; /* device has been unplugged or gone away */
1073 #endif /* __DragonFly__ */
1076 #define DRM_SWITCH_POWER_ON 0
1077 #define DRM_SWITCH_POWER_OFF 1
1078 #define DRM_SWITCH_POWER_CHANGING 2
1079 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1081 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1084 return ((dev->driver->driver_features & feature) ? 1 : 0);
1087 static inline void drm_device_set_unplugged(struct drm_device *dev)
1090 atomic_set(&dev->unplugged, 1);
1093 static inline int drm_device_is_unplugged(struct drm_device *dev)
1095 int ret = atomic_read(&dev->unplugged);
1100 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1102 return 0 /* file_priv->minor->type == DRM_MINOR_LEGACY */;
1106 * drm_is_master() - Check whether a DRM open-file is DRM-Master
1107 * @file: DRM open-file context
1109 * This checks whether a DRM open-file context is owner of the master context
1110 * attached to it. If a file owns a master context, it's called DRM-Master.
1111 * Per DRM device, only one such file can be DRM-Master at a time.
1113 * Returns: True if the file is DRM-Master, otherwise false.
1115 static inline bool drm_is_master(const struct drm_file *file)
1118 return file->master && file->master == file->minor->master;
1124 /******************************************************************/
1125 /** \name Internal function definitions */
1128 /* Driver support (drm_drv.h) */
1129 extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
1130 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist);
1131 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist);
1132 int drm_create_cdevs(device_t kdev);
1133 d_ioctl_t drm_ioctl;
1134 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
1136 /* Device support (drm_fops.h) */
1138 d_close_t drm_close;
1140 d_kqfilter_t drm_kqfilter;
1141 int drm_release(device_t kdev);
1144 d_mmap_single_t drm_mmap_single;
1146 void drm_cdevpriv_dtor(void *cd);
1148 int drm_add_busid_modesetting(struct drm_device *dev,
1149 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
1151 /* File operations helpers (drm_fops.c) */
1152 extern int drm_open_helper(struct cdev *kdev, int flags, int fmt,
1154 struct drm_device *dev,
1156 int drm_event_reserve_init_locked(struct drm_device *dev,
1157 struct drm_file *file_priv,
1158 struct drm_pending_event *p,
1159 struct drm_event *e);
1160 int drm_event_reserve_init(struct drm_device *dev,
1161 struct drm_file *file_priv,
1162 struct drm_pending_event *p,
1163 struct drm_event *e);
1164 void drm_event_cancel_free(struct drm_device *dev,
1165 struct drm_pending_event *p);
1166 void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
1167 void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
1169 /* Misc. IOCTL support (drm_ioctl.c) */
1170 int drm_noop(struct drm_device *dev, void *data,
1171 struct drm_file *file_priv);
1172 int drm_invalid_op(struct drm_device *dev, void *data,
1173 struct drm_file *file_priv);
1175 /* Cache management (drm_cache.c) */
1176 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1177 void drm_clflush_sg(struct sg_table *st);
1178 void drm_clflush_virt_range(void *addr, unsigned long length);
1181 * These are exported to drivers so that they can implement fencing using
1182 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1185 unsigned long drm_get_resource_start(struct drm_device *dev,
1186 unsigned int resource);
1187 unsigned long drm_get_resource_len(struct drm_device *dev,
1188 unsigned int resource);
1190 /* IRQ support (drm_irq.h) */
1191 extern int drm_irq_install(struct drm_device *dev, int irq);
1192 extern int drm_irq_uninstall(struct drm_device *dev);
1194 extern int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs);
1195 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1196 struct drm_file *filp);
1197 extern u32 drm_vblank_count(struct drm_device *dev, unsigned int pipe);
1198 extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
1199 extern u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
1200 struct timeval *vblanktime);
1201 extern u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc,
1202 struct timeval *vblanktime);
1203 extern void drm_send_vblank_event(struct drm_device *dev, unsigned int pipe,
1204 struct drm_pending_vblank_event *e);
1205 extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
1206 struct drm_pending_vblank_event *e);
1207 extern void drm_arm_vblank_event(struct drm_device *dev, unsigned int pipe,
1208 struct drm_pending_vblank_event *e);
1209 extern void drm_crtc_arm_vblank_event(struct drm_crtc *crtc,
1210 struct drm_pending_vblank_event *e);
1211 extern bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe);
1212 extern bool drm_crtc_handle_vblank(struct drm_crtc *crtc);
1213 extern int drm_vblank_get(struct drm_device *dev, unsigned int pipe);
1214 extern void drm_vblank_put(struct drm_device *dev, unsigned int pipe);
1215 extern int drm_crtc_vblank_get(struct drm_crtc *crtc);
1216 extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
1217 extern void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe);
1218 extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
1219 extern void drm_vblank_off(struct drm_device *dev, unsigned int pipe);
1220 extern void drm_vblank_on(struct drm_device *dev, unsigned int pipe);
1221 extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
1222 extern void drm_crtc_vblank_reset(struct drm_crtc *crtc);
1223 extern void drm_crtc_vblank_on(struct drm_crtc *crtc);
1224 extern void drm_vblank_cleanup(struct drm_device *dev);
1225 extern u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe);
1227 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1228 unsigned int pipe, int *max_error,
1229 struct timeval *vblank_time,
1231 const struct drm_display_mode *mode);
1232 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1233 const struct drm_display_mode *mode);
1236 * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
1237 * @crtc: which CRTC's vblank waitqueue to retrieve
1239 * This function returns a pointer to the vblank waitqueue for the CRTC.
1240 * Drivers can use this to implement vblank waits using wait_event() & co.
1242 static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
1244 return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
1247 /* Modesetting support */
1248 extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
1249 extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
1251 /* Stub support (drm_stub.h) */
1253 extern void drm_put_dev(struct drm_device *dev);
1254 extern void drm_unplug_dev(struct drm_device *dev);
1255 extern unsigned int drm_debug;
1256 extern bool drm_atomic;
1258 /* consistent PCI memory functions (drm_pci.c) */
1259 extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
1261 extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
1263 /* sysfs support (drm_sysfs.c) */
1264 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1266 /* sysctl support (drm_sysctl.h) */
1267 extern int drm_sysctl_init(struct drm_device *dev);
1268 extern int drm_sysctl_cleanup(struct drm_device *dev);
1270 /* XXX: These are here only because of drm_sysctl.c */
1271 extern int drm_vblank_offdelay;
1272 extern unsigned int drm_timestamp_precision;
1274 int drm_gem_mmap_single(struct drm_device *dev, vm_ooffset_t *offset,
1275 vm_size_t size, struct vm_object **obj_res, int nprot);
1277 struct ttm_bo_device;
1278 int ttm_bo_mmap_single(struct ttm_bo_device *bdev, vm_ooffset_t *offset,
1279 vm_size_t size, struct vm_object **obj_res, int nprot);
1280 struct ttm_buffer_object;
1281 void ttm_bo_release_mmap(struct ttm_buffer_object *bo);
1283 /* simplified version of kvasnprintf() for drm needs. */
1284 char *drm_vasprintf(int flags, const char *format, __va_list ap) __printflike(2, 0);
1285 char *drm_asprintf(int flags, const char *format, ...) __printflike(2, 3);
1287 /* XXX glue logic, should be done in drm_pci_init(), pending drm update */
1288 void drm_init_pdev(device_t dev, struct pci_dev **pdev);
1289 void drm_fini_pdev(struct pci_dev **pdev);
1290 void drm_print_pdev(struct pci_dev *pdev);
1292 /* Inline drm_free() helper for area kfree() */
1293 static __inline__ void
1294 drm_free(void *pt, struct malloc_type *area)
1296 /* kfree is special!!! */
1301 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1302 struct device *parent);
1303 void drm_dev_ref(struct drm_device *dev);
1304 void drm_dev_unref(struct drm_device *dev);
1305 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1306 void drm_dev_unregister(struct drm_device *dev);
1307 int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);
1311 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1313 if (dev->driver->device_is_agp != NULL) {
1314 int err = (*dev->driver->device_is_agp) (dev);
1321 return (pci_find_extcap(dev->pdev->dev.bsddev, PCIY_AGP, NULL) == 0);
1323 void drm_pci_agp_destroy(struct drm_device *dev);
1325 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1326 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1328 extern int drm_get_pci_dev(struct pci_dev *pdev,
1329 const struct pci_device_id *ent,
1330 struct drm_driver *driver);
1331 extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
1333 static inline int drm_get_pci_dev(struct pci_dev *pdev,
1334 const struct pci_device_id *ent,
1335 struct drm_driver *driver)
1340 static inline int drm_pci_set_busid(struct drm_device *dev,
1341 struct drm_master *master)
1347 #define DRM_PCIE_SPEED_25 1
1348 #define DRM_PCIE_SPEED_50 2
1349 #define DRM_PCIE_SPEED_80 4
1351 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1354 #define drm_can_sleep() (HZ & 1)
1356 #endif /* __KERNEL__ */
1358 /* helper for handling conditionals in various for_each macros */
1359 #define for_each_if(condition) if (!(condition)) {} else
1361 #endif /* _DRM_P_H_ */