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/queue.h>
58 #include <sys/signalvar.h>
60 #include <linux/highmem.h>
62 #include <sys/taskqueue.h>
66 #include <vm/vm_extern.h>
67 #include <vm/vm_kern.h>
68 #include <vm/vm_map.h>
69 #include <vm/vm_object.h>
70 #include <vm/vm_page2.h>
71 #include <vm/vm_pager.h>
72 #include <vm/vm_param.h>
73 #include <machine/param.h>
74 #include <machine/pmap.h>
76 #include <machine/specialreg.h>
78 #include <machine/sysarch.h>
79 #include <sys/endian.h>
82 #include <sys/memrange.h>
83 #include <sys/agpio.h>
84 #include <sys/mutex.h>
86 MALLOC_DECLARE(M_DRM);
88 #include <uapi_drm/drm.h>
89 #include <uapi_drm/drm_sarea.h>
91 #include <linux/atomic.h>
92 #include <linux/bug.h>
93 #include <linux/dma-mapping.h>
94 #include <linux/capability.h>
95 #include <linux/err.h>
96 #include <linux/idr.h>
97 #include <linux/pci.h>
98 #include <linux/jiffies.h>
99 #include <linux/kernel.h>
100 #include <linux/fs.h>
101 #include <linux/kref.h>
102 #include <linux/list.h>
103 #include <linux/mm.h>
104 #include <linux/moduleparam.h>
105 #include <linux/mutex.h>
106 #include <linux/slab.h>
107 #include <linux/scatterlist.h>
108 #include <linux/timer.h>
110 #include <linux/seq_file.h>
111 #include <linux/types.h>
112 #include <linux/vmalloc.h>
113 #include <linux/wait.h>
114 #include <linux/workqueue.h>
116 #include <asm/uaccess.h>
118 #include <drm/drm_global.h>
120 #include <drm/drm_vma_manager.h>
122 #include <drm/drm_os_linux.h>
123 #include <drm/drm_hashtab.h>
124 #include <drm/drm_mm.h>
129 struct drm_gem_object;
133 struct reservation_object;
134 struct dma_buf_attachment;
137 * 4 debug categories are defined:
139 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
140 * This is the category used by the DRM_DEBUG() macro.
142 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
143 * This is the category used by the DRM_DEBUG_DRIVER() macro.
145 * KMS: used in the modesetting code.
146 * This is the category used by the DRM_DEBUG_KMS() macro.
148 * PRIME: used in the prime code.
149 * This is the category used by the DRM_DEBUG_PRIME() macro.
151 * ATOMIC: used in the atomic code.
152 * This is the category used by the DRM_DEBUG_ATOMIC() macro.
154 * Enabling verbose debug messages is done through the drm.debug parameter,
155 * each category being enabled by a bit.
157 * drm.debug=0x1 will enable CORE messages
158 * drm.debug=0x2 will enable DRIVER messages
159 * drm.debug=0x3 will enable CORE and DRIVER messages
161 * drm.debug=0xf will enable all messages
163 * An interesting feature is that it's possible to enable verbose logging at
164 * run-time by echoing the debug value in its sysfs node:
165 * # echo 0xf > /sys/module/drm/parameters/debug
167 #define DRM_UT_CORE 0x01
168 #define DRM_UT_DRIVER 0x02
169 #define DRM_UT_KMS 0x04
170 #define DRM_UT_PRIME 0x08
171 #define DRM_UT_ATOMIC 0x10
173 void drm_ut_debug_printk(const char *function_name,
174 const char *format, ...);
176 void drm_err(const char *format, ...);
178 /***********************************************************************/
179 /** \name DRM template customization defaults */
182 /* driver capabilities and requirements mask */
183 #define DRIVER_USE_AGP 0x1
184 #define DRIVER_REQUIRE_AGP 0x2
185 #define DRIVER_PCI_DMA 0x8
186 #define DRIVER_SG 0x10
187 #define DRIVER_HAVE_DMA 0x20
188 #define DRIVER_HAVE_IRQ 0x40
189 #define DRIVER_IRQ_SHARED 0x80
190 #define DRIVER_DMA_QUEUE 0x200
191 #define DRIVER_GEM 0x1000
192 #define DRIVER_MODESET 0x2000
193 #define DRIVER_PRIME 0x4000
194 #define DRIVER_RENDER 0x8000
195 #define DRIVER_ATOMIC 0x10000
197 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
199 /***********************************************************************/
200 /** \name Macros to make printk easier */
206 * \param fmt printf() like format string.
207 * \param arg arguments
209 #define DRM_ERROR(fmt, ...) \
210 kprintf("error: [" DRM_NAME ":pid%d:%s] *ERROR* " fmt, \
211 DRM_CURRENTPID, __func__ , ##__VA_ARGS__)
214 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
216 * \param fmt printf() like format string.
217 * \param arg arguments
220 #define DRM_INFO(fmt, ...) kprintf("info: [" DRM_NAME "] " fmt , ##__VA_ARGS__)
222 #define DRM_INFO_ONCE(fmt, ...) \
223 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
228 * \param fmt printf() like format string.
229 * \param arg arguments
232 #define DRM_DEBUGBITS_DEBUG 0x1
233 #define DRM_DEBUGBITS_KMS 0x2
234 #define DRM_DEBUGBITS_FAILED_IOCTL 0x4
235 #define DRM_DEBUGBITS_VERBOSE 0x8
237 #define DRM_DEBUG(fmt, ...) do { \
238 if ((drm_debug & DRM_DEBUGBITS_DEBUG) != 0) \
239 kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
240 __func__ , ##__VA_ARGS__); \
243 #define DRM_DEBUG_VERBOSE(fmt, ...) do { \
244 if ((drm_debug & DRM_DEBUGBITS_VERBOSE) != 0) \
245 kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
246 __func__ , ##__VA_ARGS__); \
249 #define DRM_DEBUG_KMS(fmt, ...) do { \
250 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) \
251 kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
252 __func__ , ##__VA_ARGS__); \
255 #define DRM_DEBUG_DRIVER(fmt, ...) do { \
256 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) \
257 kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
258 __func__ , ##__VA_ARGS__); \
261 #define DRM_DEBUG_ATOMIC(fmt, args...) \
263 if (unlikely(drm_debug & DRM_UT_ATOMIC)) \
264 drm_ut_debug_printk(__func__, fmt, ##args); \
269 /***********************************************************************/
270 /** \name Internal types and structures */
273 #define DRM_GEM_MAPPING_MASK (3ULL << 62)
274 #define DRM_GEM_MAPPING_KEY (2ULL << 62) /* Non-canonical address form */
275 #define DRM_GEM_MAX_IDX 0x3fffff
276 #define DRM_GEM_MAPPING_IDX(o) (((o) >> 40) & DRM_GEM_MAX_IDX)
277 #define DRM_GEM_MAPPING_OFF(i) (((uint64_t)(i)) << 40)
278 #define DRM_GEM_MAPPING_MAPOFF(o) \
279 ((o) & ~(DRM_GEM_MAPPING_OFF(DRM_GEM_MAX_IDX) | DRM_GEM_MAPPING_KEY))
281 SYSCTL_DECL(_hw_drm);
283 #define DRM_MAX(a,b) ((a)>(b)?(a):(b))
285 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
287 #define __OS_HAS_AGP 1
289 #define DRM_DEV_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
290 #define DRM_DEV_UID UID_ROOT
291 #define DRM_DEV_GID GID_WHEEL
293 #define DRM_CURPROC curthread
294 #define DRM_STRUCTPROC struct thread
295 #define DRM_CURRENTPID (curproc != NULL ? curproc->p_pid : -1)
296 #define DRM_LOCK(dev) lockmgr(&(dev)->struct_mutex, LK_EXCLUSIVE)
297 #define DRM_UNLOCK(dev) lockmgr(&(dev)->struct_mutex, LK_RELEASE)
298 #define DRM_LOCK_SLEEP(dev, chan, flags, msg, timeout) \
299 (lksleep((chan), &(dev)->struct_mutex, (flags), (msg), (timeout)))
300 #if defined(INVARIANTS)
301 #define DRM_LOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) != 0);
302 #define DRM_UNLOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) == 0);
304 #define DRM_LOCK_ASSERT(d)
305 #define DRM_UNLOCK_ASSERT(d)
308 #define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)
310 typedef void irqreturn_t;
311 #define IRQ_HANDLED /* nothing */
312 #define IRQ_NONE /* nothing */
319 #define DRM_AGP_MEM struct agp_memory_info
321 #define drm_get_device_from_kdev(_kdev) (_kdev->si_drv1)
323 #define DRM_AGP_FIND_DEVICE() agp_find_device()
324 #define DRM_MTRR_WC MDF_WRITECOMBINE
326 #define LOCK_TEST_WITH_RETURN(dev, file_priv) \
328 if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) || \
329 dev->lock.file_priv != file_priv) { \
330 DRM_ERROR("%s called without lock held\n", \
336 /* Returns -errno to shared code */
337 #define DRM_WAIT_ON( ret, queue, timeout, condition ) \
338 for ( ret = 0 ; !ret && !(condition) ; ) { \
339 lwkt_serialize_enter(&dev->irq_lock); \
340 if (!(condition)) { \
341 tsleep_interlock(&(queue), PCATCH); \
342 lwkt_serialize_exit(&dev->irq_lock); \
343 ret = -tsleep(&(queue), PCATCH | PINTERLOCKED, \
344 "drmwtq", (timeout)); \
346 lwkt_serialize_exit(&dev->irq_lock); \
350 int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
351 vm_memattr_t memattr);
352 void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
353 vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);
356 #define dev_dbg(dev, fmt, ...) do { \
357 if ((drm_debug& DRM_DEBUGBITS_KMS) != 0) { \
358 device_printf((dev), "debug: " fmt, ## __VA_ARGS__); \
362 typedef struct drm_pci_id_list
371 * Ioctl function type.
373 * \param inode device inode.
374 * \param file_priv DRM file private pointer.
375 * \param cmd command.
376 * \param arg argument.
378 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
379 struct drm_file *file_priv);
381 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
384 #define DRM_IOCTL_NR(n) ((n) & 0xff)
387 #define DRM_MASTER 0x2
388 #define DRM_ROOT_ONLY 0x4
389 #define DRM_CONTROL_ALLOW 0x8
390 #define DRM_UNLOCKED 0x10
391 #define DRM_RENDER_ALLOW 0x20
393 struct drm_ioctl_desc {
397 unsigned int cmd_drv;
402 * Creates a driver or general drm_ioctl_desc array entry for the given
403 * ioctl, for use by drm_ioctl().
405 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
406 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl}
408 typedef struct drm_magic_entry {
409 struct list_head head;
410 struct drm_hash_item hash_item;
411 struct drm_file *priv;
412 struct drm_magic_entry *next;
415 typedef struct drm_magic_head {
416 struct drm_magic_entry *head;
417 struct drm_magic_entry *tail;
420 typedef struct drm_buf {
421 int idx; /**< Index into master buflist */
422 int total; /**< Buffer size */
423 int order; /**< log-base-2(total) */
424 int used; /**< Amount of buffer in use (for DMA) */
425 unsigned long offset; /**< Byte offset (used internally) */
426 void *address; /**< Address of buffer */
427 unsigned long bus_address; /**< Bus address of buffer */
428 struct drm_buf *next; /**< Kernel-only: used for free list */
429 __volatile__ int waiting; /**< On kernel DMA queue */
430 __volatile__ int pending; /**< On hardware DMA queue */
431 struct drm_file *file_priv; /**< Private of holding file descr */
432 int context; /**< Kernel queue for this buffer */
433 int while_locked; /**< Dispatch this buffer while locked */
441 } list; /**< Which list we're on */
443 int dev_priv_size; /**< Size of buffer private storage */
444 void *dev_private; /**< Per-buffer private storage */
447 /** bufs is one longer than it has to be */
448 struct drm_waitlist {
449 int count; /**< Number of possible buffers */
450 struct drm_buf **bufs; /**< List of pointers to buffers */
451 struct drm_buf **rp; /**< Read pointer */
452 struct drm_buf **wp; /**< Write pointer */
453 struct drm_buf **end; /**< End pointer */
454 struct spinlock *read_lock;
455 struct spinlock *write_lock;
458 typedef struct drm_dma_handle {
466 typedef struct drm_buf_entry {
472 struct drm_dma_handle **seglist;
474 int low_mark; /**< Low water mark */
475 int high_mark; /**< High water mark */
478 /* Event queued up for userspace to read */
479 struct drm_pending_event {
480 struct drm_event *event;
481 struct list_head link;
482 struct drm_file *file_priv;
483 pid_t pid; /* pid of requester, no guarantee it's valid by the time
484 we deliver the event, for tracing only */
485 void (*destroy)(struct drm_pending_event *event);
488 /* initial implementaton using a linked list - todo hashtab */
489 struct drm_prime_file_private {
490 struct list_head head;
493 #endif /* DUMBBELL_WIP */
496 /** File private data */
499 struct drm_device *dev;
502 /* true when the client has asked us to expose stereo 3D mode flags */
505 * true if client understands CRTC primary planes and cursor planes
508 unsigned universal_planes:1;
509 /* true if client understands atomic properties */
515 unsigned long ioctl_count;
516 struct list_head lhead;
519 /** Mapping of mm object handles to object pointers. */
520 struct idr object_idr;
521 /** Lock for synchronization of access to object_idr. */
522 struct lock table_lock;
527 struct drm_master *masterp;
530 * fbs - List of framebuffers associated with this file.
532 * Protected by fbs_lock. Note that the fbs list holds a reference on
533 * the fb object to prevent it from untimely disappearing.
535 struct list_head fbs;
536 struct lock fbs_lock;
538 /** User-created blob properties; this retains a reference on the
540 struct list_head blobs;
542 wait_queue_head_t event_wait;
543 struct list_head event_list;
546 struct drm_prime_file_private prime;
552 struct drm_lock_data {
553 struct drm_hw_lock *hw_lock; /**< Hardware lock */
554 /** Private of lock holder's file (NULL=kernel) */
555 struct drm_file *file_priv;
556 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
557 unsigned long lock_time; /**< Time of last lock in jiffies */
560 /* This structure, in the struct drm_device, is always initialized while the
562 * is open. dev->dma_lock protects the incrementing of dev->buf_use, which
563 * when set marks that no further bufs may be allocated until device teardown
564 * occurs (when the last open of the device has closed). The high/low
565 * watermarks of bufs are only touched by the X Server, and thus not
566 * concurrently accessed, so no locking is needed.
568 typedef struct drm_device_dma {
570 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
571 int buf_count; /**< total number of buffers */
572 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
574 int page_count; /**< number of pages */
575 unsigned long *pagelist; /**< page list */
576 unsigned long byte_count;
578 _DRM_DMA_USE_AGP = 0x01,
579 _DRM_DMA_USE_SG = 0x02,
580 _DRM_DMA_USE_FB = 0x04,
581 _DRM_DMA_USE_PCI_RO = 0x08
586 typedef struct drm_sg_mem {
593 * Kernel side of a mapping
595 struct drm_local_map {
596 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
597 unsigned long size; /**< Requested physical size (bytes) */
598 enum drm_map_type type; /**< Type of memory to map */
599 enum drm_map_flags flags; /**< Flags */
600 void *handle; /**< User-space: "Handle" to pass to mmap() */
601 /**< Kernel-space: kernel-virtual address */
602 int mtrr; /**< MTRR slot used */
605 typedef struct drm_local_map drm_local_map_t;
610 struct drm_map_list {
611 struct list_head head; /**< list head */
612 struct drm_hash_item hash;
613 struct drm_local_map *map; /**< mapping */
615 struct drm_master *master;
616 struct drm_mm_node *file_offset_node; /**< fake offset */
620 * GEM specific mm private for tracking GEM objects
623 struct drm_vma_offset_manager vma_manager;
624 struct drm_mm offset_manager; /**< Offset mgmt for buffer objects */
625 struct drm_open_hash offset_hash; /**< User token hash table for maps */
626 struct unrhdr *idxunr;
630 #include "drm_crtc.h"
633 * struct drm_master - drm master structure
635 * @refcount: Refcount for this master object.
636 * @minor: Link back to minor char device we are master for. Immutable.
637 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
638 * @unique_len: Length of unique field. Protected by drm_global_mutex.
639 * @unique_size: Amount allocated. Protected by drm_global_mutex.
640 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
641 * @magicfree: List of used authentication tokens. Protected by struct_mutex.
642 * @lock: DRI lock information.
643 * @driver_priv: Pointer to driver-private information.
647 struct kref refcount; /* refcount for this master */
649 struct list_head head; /**< each minor contains a list of masters */
650 struct drm_minor *minor; /**< link back to minor we are a master for */
652 char *unique; /**< Unique identifier: e.g., busid */
653 int unique_len; /**< Length of unique field */
654 int unique_size; /**< amount allocated */
656 int blocked; /**< Blocked due to VC switch? */
658 struct drm_open_hash magiclist;
659 struct list_head magicfree;
660 struct drm_lock_data lock;
664 /* Size of ringbuffer for vblank timestamps. Just double-buffer
665 * in initial implementation.
667 #define DRM_VBLANKTIME_RBSIZE 2
669 /* Flags and return codes for get_vblank_timestamp() driver function. */
670 #define DRM_CALLED_FROM_VBLIRQ 1
671 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
672 #define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
674 /* get_scanout_position() return flags */
675 #define DRM_SCANOUTPOS_VALID (1 << 0)
676 #define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
677 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
680 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : (1ULL<<(n)) - 1)
683 #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
686 * DRM driver structure. This structure represent the common code for
687 * a family of cards. There will one drm_device for each card present
691 int (*load)(struct drm_device *, unsigned long flags);
692 int (*use_msi)(struct drm_device *, unsigned long flags);
693 int (*firstopen)(struct drm_device *);
694 int (*open)(struct drm_device *, struct drm_file *);
695 void (*preclose)(struct drm_device *, struct drm_file *file_priv);
696 void (*postclose)(struct drm_device *, struct drm_file *);
697 void (*lastclose)(struct drm_device *);
698 int (*unload)(struct drm_device *);
699 void (*reclaim_buffers_locked)(struct drm_device *,
700 struct drm_file *file_priv);
701 int (*dma_ioctl)(struct drm_device *dev, void *data,
702 struct drm_file *file_priv);
703 void (*dma_ready)(struct drm_device *);
704 int (*dma_quiescent)(struct drm_device *);
705 int (*dma_flush_block_and_flush)(struct drm_device *, int context,
706 enum drm_lock_flags flags);
707 int (*dma_flush_unblock)(struct drm_device *, int context,
708 enum drm_lock_flags flags);
709 int (*context_ctor)(struct drm_device *dev, int context);
710 int (*context_dtor)(struct drm_device *dev, int context);
711 int (*kernel_context_switch)(struct drm_device *dev, int old,
713 int (*kernel_context_switch_unlock)(struct drm_device *dev);
714 void (*irq_preinstall)(struct drm_device *dev);
715 int (*irq_postinstall)(struct drm_device *dev);
716 void (*irq_uninstall)(struct drm_device *dev);
717 void (*irq_handler)(void *arg);
719 u32 (*get_vblank_counter)(struct drm_device *dev, int crtc);
720 int (*enable_vblank)(struct drm_device *dev, int crtc);
721 void (*disable_vblank)(struct drm_device *dev, int crtc);
724 * Called by vblank timestamping code.
726 * Return the current display scanout position from a crtc, and an
727 * optional accurate ktime_get timestamp of when position was measured.
729 * \param dev DRM device.
730 * \param crtc Id of the crtc to query.
731 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
732 * \param *vpos Target location for current vertical scanout position.
733 * \param *hpos Target location for current horizontal scanout position.
734 * \param *stime Target location for timestamp taken immediately before
735 * scanout position query. Can be NULL to skip timestamp.
736 * \param *etime Target location for timestamp taken immediately after
737 * scanout position query. Can be NULL to skip timestamp.
739 * Returns vpos as a positive number while in active scanout area.
740 * Returns vpos as a negative number inside vblank, counting the number
741 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
742 * until start of active scanout / end of vblank."
744 * \return Flags, or'ed together as follows:
746 * DRM_SCANOUTPOS_VALID = Query successful.
747 * DRM_SCANOUTPOS_INVBL = Inside vblank.
748 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
749 * this flag means that returned position may be offset by a constant
750 * but unknown small number of scanlines wrt. real scanout position.
753 int (*get_scanout_position) (struct drm_device *dev, int crtc,
755 int *vpos, int *hpos, ktime_t *stime,
758 int (*get_vblank_timestamp)(struct drm_device *dev, int crtc,
759 int *max_error, struct timeval *vblank_time,
762 void (*gem_free_object)(struct drm_gem_object *obj);
763 int (*gem_open_object)(struct drm_gem_object *, struct drm_file *);
764 void (*gem_close_object)(struct drm_gem_object *, struct drm_file *);
766 struct cdev_pager_ops *gem_pager_ops;
768 int (*dumb_create)(struct drm_file *file_priv,
769 struct drm_device *dev, struct drm_mode_create_dumb *args);
770 int (*dumb_map_offset)(struct drm_file *file_priv,
771 struct drm_device *dev, uint32_t handle, uint64_t *offset);
772 int (*dumb_destroy)(struct drm_file *file_priv,
773 struct drm_device *dev, uint32_t handle);
775 int (*sysctl_init)(struct drm_device *dev,
776 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
777 void (*sysctl_cleanup)(struct drm_device *dev);
779 drm_pci_id_list_t *id_entry; /* PCI ID, name, and chipset private */
782 * Called by \c drm_device_is_agp. Typically used to determine if a
783 * card is really attached to AGP or not.
785 * \param dev DRM device handle
788 * One of three values is returned depending on whether or not the
789 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
790 * (return of 1), or may or may not be AGP (return of 2).
792 int (*device_is_agp) (struct drm_device * dev);
797 const char *name; /* Simple driver name */
798 const char *desc; /* Longer driver name */
799 const char *date; /* Date of last major changes. */
803 const struct drm_ioctl_desc *ioctls;
808 * Info file list entry. This structure represents a debugfs or proc file to
809 * be created by the drm core
811 struct drm_info_list {
812 const char *name; /** file name */
813 int (*show)(struct seq_file*, void*); /** show callback */
814 u32 driver_features; /**< Required driver features for this entry */
819 * debugfs node structure. This structure represents a debugfs file.
821 struct drm_info_node {
822 struct list_head list;
823 struct drm_minor *minor;
824 const struct drm_info_list *info_ent;
829 * DRM minor structure. This structure represents a drm minor number.
832 int index; /**< Minor device number */
833 int type; /**< Control or render */
834 device_t kdev; /**< OS device */
835 struct drm_device *dev;
837 struct drm_master *master; /* currently active master for this node */
838 struct list_head master_list;
839 struct drm_mode_group mode_group;
842 struct drm_pending_vblank_event {
843 struct drm_pending_event base;
845 struct drm_event_vblank event;
848 struct drm_sysctl_info {
849 struct sysctl_ctx_list ctx;
853 /* Length for the array of resource pointers for drm_get_resource_*. */
854 #define DRM_MAX_PCI_RESOURCE 6
856 struct drm_vblank_crtc {
857 struct drm_device *dev; /* pointer to the drm_device */
858 wait_queue_head_t queue; /**< VBLANK wait queue */
859 struct timer_list disable_timer; /* delayed disable timer */
861 /* vblank counter, protected by dev->vblank_time_lock for writes */
863 /* vblank timestamps, protected by dev->vblank_time_lock for writes */
864 struct timeval time[DRM_VBLANKTIME_RBSIZE];
866 atomic_t refcount; /* number of users of vblank interruptsper crtc */
867 u32 last; /* protected by dev->vbl_lock, used */
868 /* for wraparound handling */
869 u32 last_wait; /* Last vblank seqno waited per CRTC */
870 unsigned int inmodeset; /* Display driver is setting mode */
871 int crtc; /* crtc index */
872 bool enabled; /* so we don't call enable more than
877 * DRM device structure. This structure represent a complete card that
878 * may contain multiple heads.
881 drm_pci_id_list_t *id_entry; /* PCI ID, name, and chipset private */
883 char *unique; /* Unique identifier: e.g., busid */
884 int unique_len; /* Length of unique field */
885 struct cdev *devnode; /* Device number for mknod */
886 int if_version; /* Highest interface version set */
888 int flags; /* Flags to open(2) */
891 struct spinlock dma_lock; /* protects dev->dma */
892 struct lwkt_serialize irq_lock; /* protects irq condition checks */
893 struct lock dev_lock; /* protects everything else */
897 struct lock struct_mutex; /**< For others */
898 struct lock master_mutex; /**< For drm_minor::master */
901 /** \name Usage Counters */
903 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
904 struct spinlock buf_lock; /**< For drm_device::buf_use and a few other things. */
905 int buf_use; /**< Buffers in use -- cannot alloc */
906 atomic_t buf_alloc; /**< Buffer allocation in progress */
910 /** \name Performance counters */
912 unsigned long counters;
913 enum drm_stat_type types[15];
918 struct drm_open_hash magiclist; /**< magic hash table */
919 struct list_head magicfree;
921 struct list_head filelist;
923 /** \name Memory management */
925 struct list_head maplist; /**< Linked list of regions */
926 int map_count; /**< Number of mappable regions */
927 struct drm_open_hash map_hash; /**< User token hash table for maps */
929 /** \name Context handle management */
931 struct list_head ctxlist; /**< Linked list of context handles */
932 int ctx_count; /**< Number of context handles */
933 struct lock ctxlist_mutex; /**< For ctxlist */
939 struct drm_lock_data lock; /* Information on hardware lock */
941 /* DMA queues (contexts) */
942 drm_device_dma_t *dma; /* Optional pointer for DMA support */
944 int irq; /* Interrupt used by board */
945 int irq_type; /* IRQ type (MSI enabled or not) */
946 int irqrid; /* Interrupt used by board */
947 struct resource *irqr; /* Resource for interrupt used by board */
948 void *irqh; /* Handle from bus_setup_intr */
950 /* Storage of resource pointers for drm_get_resource_* */
951 struct resource *pcir[DRM_MAX_PCI_RESOURCE];
952 int pcirid[DRM_MAX_PCI_RESOURCE];
959 /** \name Context support */
961 int irq_enabled; /**< True if irq handler is enabled */
962 __volatile__ long context_flag; /**< Context swapping flag */
963 __volatile__ long interrupt_flag; /**< Interruption handler flag */
964 __volatile__ long dma_flag; /**< DMA dispatch flag */
965 wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
966 int last_checked; /**< Last context checked for DMA */
967 int last_context; /**< Last current context */
968 unsigned long last_switch; /**< jiffies at last context switch */
971 /** \name VBLANK IRQ support */
975 * At load time, disabling the vblank interrupt won't be allowed since
976 * old clients may not call the modeset ioctl and therefore misbehave.
977 * Once the modeset ioctl *has* been called though, we can safely
978 * disable them when unused.
980 bool vblank_disable_allowed;
983 * If true, vblank interrupt will be disabled immediately when the
984 * refcount drops to zero, as opposed to via the vblank disable
986 * This can be set to true it the hardware has a working vblank
987 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
990 bool vblank_disable_immediate;
992 /* array of size num_crtcs */
993 struct drm_vblank_crtc *vblank;
995 struct lock vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
996 struct lock vbl_lock;
997 struct timer_list vblank_disable_timer;
999 u32 max_vblank_count; /**< size of vblank counter register */
1004 struct list_head vblank_event_list;
1005 struct lock event_lock;
1009 struct sigio *buf_sigio; /* Processes waiting for SIGIO */
1011 /* Sysctl support */
1012 struct drm_sysctl_info *sysctl;
1015 drm_sg_mem_t *sg; /* Scatter gather memory */
1016 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1018 unsigned long *ctx_bitmap;
1025 struct drm_agp_head *agp; /**< AGP data */
1027 struct device *dev; /**< Device structure */
1028 struct pci_dev *pdev; /**< PCI device structure */
1030 struct drm_driver *driver;
1031 struct drm_local_map *agp_buffer_map;
1032 unsigned int agp_buffer_token;
1033 struct drm_minor *control; /**< Control node for card */
1034 struct drm_minor *primary; /**< render type primary screen head */
1036 struct drm_mode_config mode_config; /**< Current mode config */
1038 /** \name GEM information */
1040 struct lock object_name_lock;
1041 struct idr object_name_idr;
1045 void *sysctl_private;
1046 char busid_str[128];
1049 int switch_power_state;
1051 atomic_t unplugged; /* device has been unplugged or gone away */
1054 #define DRM_SWITCH_POWER_ON 0
1055 #define DRM_SWITCH_POWER_OFF 1
1056 #define DRM_SWITCH_POWER_CHANGING 2
1057 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1059 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1062 return ((dev->driver->driver_features & feature) ? 1 : 0);
1065 static inline void drm_device_set_unplugged(struct drm_device *dev)
1068 atomic_set(&dev->unplugged, 1);
1071 static inline int drm_device_is_unplugged(struct drm_device *dev)
1073 int ret = atomic_read(&dev->unplugged);
1078 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1080 return 0 /* file_priv->minor->type == DRM_MINOR_LEGACY */;
1084 * drm_is_master() - Check whether a DRM open-file is DRM-Master
1085 * @file: DRM open-file context
1087 * This checks whether a DRM open-file context is owner of the master context
1088 * attached to it. If a file owns a master context, it's called DRM-Master.
1089 * Per DRM device, only one such file can be DRM-Master at a time.
1091 * Returns: True if the file is DRM-Master, otherwise false.
1093 static inline bool drm_is_master(const struct drm_file *file)
1096 return file->master && file->master == file->minor->master;
1102 /******************************************************************/
1103 /** \name Internal function definitions */
1107 static inline int drm_core_has_AGP(struct drm_device *dev)
1109 return drm_core_check_feature(dev, DRIVER_USE_AGP);
1112 #define drm_core_has_AGP(dev) (0)
1115 extern int drm_notyet_flag;
1116 extern unsigned int drm_rnodes;
1117 extern unsigned int drm_universal_planes;
1119 extern int drm_vblank_offdelay;
1120 extern unsigned int drm_timestamp_precision;
1122 /* Driver support (drm_drv.h) */
1123 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist);
1124 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist);
1125 int drm_create_cdevs(device_t kdev);
1126 d_ioctl_t drm_ioctl;
1127 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
1129 /* Device support (drm_fops.h) */
1131 d_close_t drm_close;
1133 d_kqfilter_t drm_kqfilter;
1134 int drm_release(device_t kdev);
1137 d_mmap_single_t drm_mmap_single;
1139 void drm_cdevpriv_dtor(void *cd);
1141 int drm_add_busid_modesetting(struct drm_device *dev,
1142 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
1144 /* File operations helpers (drm_fops.c) */
1145 extern int drm_open_helper(struct cdev *kdev, int flags, int fmt,
1147 struct drm_device *dev,
1149 extern struct drm_file *drm_find_file_by_proc(struct drm_device *dev,
1153 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1154 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1156 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1157 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1159 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1160 struct drm_file *file_priv);
1161 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1162 struct drm_file *file_priv);
1164 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, vm_page_t *pages,
1165 dma_addr_t *addrs, int max_pages);
1166 #endif /* DUMBBELL_WIP */
1167 extern struct sg_table *drm_prime_pages_to_sg(vm_page_t *pages, int nr_pages);
1168 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1171 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1172 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1173 int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
1174 int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
1175 void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1177 int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
1178 int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
1179 struct drm_gem_object **obj);
1180 #endif /* DUMBBELL_WIP */
1182 int drm_mtrr_add(unsigned long offset, size_t size, int flags);
1183 int drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags);
1185 /* Locking IOCTL support (drm_lock.c) */
1186 int drm_lock_take(struct drm_lock_data *lock_data,
1187 unsigned int context);
1188 int drm_lock_transfer(struct drm_lock_data *lock_data,
1189 unsigned int context);
1190 int drm_lock_free(struct drm_lock_data *lock_data,
1191 unsigned int context);
1194 * These are exported to drivers so that they can implement fencing using
1195 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1198 unsigned long drm_get_resource_start(struct drm_device *dev,
1199 unsigned int resource);
1200 unsigned long drm_get_resource_len(struct drm_device *dev,
1201 unsigned int resource);
1203 /* IRQ support (drm_irq.h) */
1204 extern int drm_irq_install(struct drm_device *dev, int irq);
1205 int drm_irq_uninstall(struct drm_device *dev);
1206 void drm_driver_irq_preinstall(struct drm_device *dev);
1207 void drm_driver_irq_postinstall(struct drm_device *dev);
1208 void drm_driver_irq_uninstall(struct drm_device *dev);
1210 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1211 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1212 struct drm_file *filp);
1213 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1214 extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
1215 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1216 struct timeval *vblanktime);
1217 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1218 struct drm_pending_vblank_event *e);
1219 extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
1220 struct drm_pending_vblank_event *e);
1221 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1222 extern bool drm_crtc_handle_vblank(struct drm_crtc *crtc);
1223 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1224 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1225 extern int drm_crtc_vblank_get(struct drm_crtc *crtc);
1226 extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
1227 extern void drm_wait_one_vblank(struct drm_device *dev, int crtc);
1228 extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
1229 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1230 extern void drm_vblank_on(struct drm_device *dev, int crtc);
1231 extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
1232 extern void drm_crtc_vblank_reset(struct drm_crtc *crtc);
1233 extern void drm_crtc_vblank_on(struct drm_crtc *crtc);
1234 extern void drm_vblank_cleanup(struct drm_device *dev);
1236 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1237 int crtc, int *max_error,
1238 struct timeval *vblank_time,
1240 const struct drm_crtc *refcrtc,
1241 const struct drm_display_mode *mode);
1242 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1243 const struct drm_display_mode *mode);
1246 * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
1247 * @crtc: which CRTC's vblank waitqueue to retrieve
1249 * This function returns a pointer to the vblank waitqueue for the CRTC.
1250 * Drivers can use this to implement vblank waits using wait_event() & co.
1252 static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
1254 return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
1257 /* Modesetting support */
1258 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1259 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1261 /* AGP/GART support (drm_agpsupport.h) */
1263 #include <drm/drm_agpsupport.h>
1265 /* sysctl support (drm_sysctl.h) */
1266 extern int drm_sysctl_init(struct drm_device *dev);
1267 extern int drm_sysctl_cleanup(struct drm_device *dev);
1269 /* Cache management (drm_memory.c) */
1270 void drm_clflush_pages(vm_page_t *pages, unsigned long num_pages);
1272 /* Locking IOCTL support (drm_drv.c) */
1273 int drm_lock(struct drm_device *dev, void *data,
1274 struct drm_file *file_priv);
1275 int drm_unlock(struct drm_device *dev, void *data,
1276 struct drm_file *file_priv);
1277 int drm_setversion(struct drm_device *dev, void *data,
1278 struct drm_file *file_priv);
1281 * These are exported to drivers so that they can implement fencing using
1282 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1285 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1287 /* Misc. IOCTL support (drm_ioctl.c) */
1288 int drm_noop(struct drm_device *dev, void *data,
1289 struct drm_file *file_priv);
1291 /* Cache management (drm_cache.c) */
1292 void drm_clflush_virt_range(void *addr, unsigned long length);
1294 /* DMA support (drm_dma.c) */
1295 int drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv);
1297 /* Stub support (drm_stub.h) */
1299 extern void drm_put_dev(struct drm_device *dev);
1300 extern void drm_unplug_dev(struct drm_device *dev);
1301 extern unsigned int drm_debug;
1302 extern bool drm_atomic;
1304 /* Scatter Gather Support (drm_scatter.c) */
1305 int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1306 struct drm_file *file_priv);
1307 int drm_sg_free(struct drm_device *dev, void *data,
1308 struct drm_file *file_priv);
1310 /* consistent PCI memory functions (drm_pci.c) */
1311 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1313 void drm_pci_free(struct drm_device *dev, drm_dma_handle_t *dmah);
1315 /* sysfs support (drm_sysfs.c) */
1316 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1318 int drm_gem_mmap_single(struct drm_device *dev, vm_ooffset_t *offset,
1319 vm_size_t size, struct vm_object **obj_res, int nprot);
1320 void drm_gem_pager_dtr(void *obj);
1322 struct ttm_bo_device;
1323 int ttm_bo_mmap_single(struct ttm_bo_device *bdev, vm_ooffset_t *offset,
1324 vm_size_t size, struct vm_object **obj_res, int nprot);
1325 struct ttm_buffer_object;
1326 void ttm_bo_release_mmap(struct ttm_buffer_object *bo);
1328 void drm_device_lock_mtx(struct drm_device *dev);
1329 void drm_device_unlock_mtx(struct drm_device *dev);
1330 int drm_device_sleep_mtx(struct drm_device *dev, void *chan, int flags,
1331 const char *msg, int timeout);
1332 void drm_device_assert_mtx_locked(struct drm_device *dev);
1333 void drm_device_assert_mtx_unlocked(struct drm_device *dev);
1335 void drm_device_lock_struct(struct drm_device *dev);
1336 void drm_device_unlock_struct(struct drm_device *dev);
1337 int drm_device_sleep_struct(struct drm_device *dev, void *chan, int flags,
1338 const char *msg, int timeout);
1339 void drm_device_assert_struct_locked(struct drm_device *dev);
1340 void drm_device_assert_struct_unlocked(struct drm_device *dev);
1342 void drm_compat_locking_init(struct drm_device *dev);
1343 void drm_sleep_locking_init(struct drm_device *dev);
1345 /* XXX glue logic, should be done in drm_pci_init(), pending drm update */
1346 void drm_init_pdev(struct device *dev, struct pci_dev **pdev);
1347 void drm_fini_pdev(struct pci_dev **pdev);
1349 /* Inline replacements for drm_alloc and friends */
1350 static __inline__ void *
1351 drm_alloc(size_t size, struct malloc_type *area)
1353 return kmalloc(size, area, M_WAITOK | M_NULLOK);
1356 static __inline__ void *
1357 drm_calloc(size_t nmemb, size_t size, struct malloc_type *area)
1359 return kmalloc(size * nmemb, area, M_WAITOK | M_NULLOK | M_ZERO);
1362 static __inline__ void
1363 drm_free(void *pt, struct malloc_type *area)
1365 /* kfree is special!!! */
1370 static __inline__ struct drm_local_map *
1371 drm_core_findmap(struct drm_device *dev, unsigned long offset)
1373 struct drm_map_list *_entry;
1375 list_for_each_entry(_entry, &dev->maplist, head) {
1376 if (offset == (unsigned long)_entry->map->handle)
1382 static __inline__ void drm_core_dropmap(struct drm_map *map)
1386 #include <drm/drm_mem_util.h>
1388 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1389 struct device *parent);
1390 void drm_dev_ref(struct drm_device *dev);
1391 void drm_dev_unref(struct drm_device *dev);
1392 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1393 void drm_dev_unregister(struct drm_device *dev);
1394 int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);
1396 /* FreeBSD compatibility macros */
1397 #define VM_OBJECT_WLOCK(object) VM_OBJECT_LOCK(object)
1398 #define VM_OBJECT_WUNLOCK(object) VM_OBJECT_UNLOCK(object)
1400 #define DRM_PCIE_SPEED_25 1
1401 #define DRM_PCIE_SPEED_50 2
1402 #define DRM_PCIE_SPEED_80 4
1404 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1407 #define drm_can_sleep() (HZ & 1)
1409 #endif /* __KERNEL__ */
1410 #endif /* _DRM_P_H_ */