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/mutex.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.
158 * Enabling verbose debug messages is done through the drm.debug parameter,
159 * each category being enabled by a bit.
161 * drm.debug=0x1 will enable CORE messages
162 * drm.debug=0x2 will enable DRIVER messages
163 * drm.debug=0x3 will enable CORE and DRIVER messages
165 * drm.debug=0xf will enable all messages
167 * An interesting feature is that it's possible to enable verbose logging at
168 * run-time by echoing the debug value in its sysfs node:
169 * # echo 0xf > /sys/module/drm/parameters/debug
171 #define DRM_UT_CORE 0x01
172 #define DRM_UT_DRIVER 0x02
173 #define DRM_UT_KMS 0x04
174 #define DRM_UT_PRIME 0x08
175 #define DRM_UT_ATOMIC 0x10
177 void drm_ut_debug_printk(const char *function_name,
178 const char *format, ...);
180 void drm_err(const char *format, ...);
182 /***********************************************************************/
183 /** \name DRM template customization defaults */
186 /* driver capabilities and requirements mask */
187 #define DRIVER_USE_AGP 0x1
188 #define DRIVER_REQUIRE_AGP 0x2
189 #define DRIVER_PCI_DMA 0x8
190 #define DRIVER_SG 0x10
191 #define DRIVER_HAVE_DMA 0x20
192 #define DRIVER_HAVE_IRQ 0x40
193 #define DRIVER_IRQ_SHARED 0x80
194 #define DRIVER_GEM 0x1000
195 #define DRIVER_MODESET 0x2000
196 #define DRIVER_PRIME 0x4000
197 #define DRIVER_RENDER 0x8000
198 #define DRIVER_ATOMIC 0x10000
199 #define DRIVER_KMS_LEGACY_CONTEXT 0x20000
201 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
203 /***********************************************************************/
204 /** \name Macros to make printk easier */
210 * \param fmt printf() like format string.
211 * \param arg arguments
213 #define DRM_ERROR(fmt, ...) \
214 kprintf("error: [" DRM_NAME ":pid%d:%s] *ERROR* " fmt, \
215 DRM_CURRENTPID, __func__ , ##__VA_ARGS__)
218 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
220 * \param fmt printf() like format string.
221 * \param arg arguments
224 #define DRM_INFO(fmt, ...) kprintf("info: [" DRM_NAME "] " fmt , ##__VA_ARGS__)
226 #define DRM_INFO_ONCE(fmt, ...) \
227 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
232 * \param fmt printf() like format string.
233 * \param arg arguments
236 #define DRM_DEBUGBITS_DEBUG 0x1
237 #define DRM_DEBUGBITS_KMS 0x2
238 #define DRM_DEBUGBITS_FAILED_IOCTL 0x4
239 #define DRM_DEBUGBITS_VERBOSE 0x8
241 #define DRM_DEBUG(fmt, ...) do { \
242 if ((drm_debug & DRM_DEBUGBITS_DEBUG) != 0) \
243 kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
244 __func__ , ##__VA_ARGS__); \
247 #define DRM_DEBUG_VERBOSE(fmt, ...) do { \
248 if ((drm_debug & DRM_DEBUGBITS_VERBOSE) != 0) \
249 kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
250 __func__ , ##__VA_ARGS__); \
253 #define DRM_DEBUG_KMS(fmt, ...) do { \
254 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) \
255 kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
256 __func__ , ##__VA_ARGS__); \
259 #define DRM_DEBUG_DRIVER(fmt, ...) do { \
260 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) \
261 kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
262 __func__ , ##__VA_ARGS__); \
265 #define DRM_DEBUG_ATOMIC(fmt, args...) \
267 if (unlikely(drm_debug & DRM_UT_ATOMIC)) \
268 drm_ut_debug_printk(__func__, fmt, ##args); \
273 /***********************************************************************/
274 /** \name Internal types and structures */
277 #define DRM_GEM_MAPPING_MASK (3ULL << 62)
278 #define DRM_GEM_MAPPING_KEY (2ULL << 62) /* Non-canonical address form */
279 #define DRM_GEM_MAX_IDX 0x3fffff
280 #define DRM_GEM_MAPPING_IDX(o) (((o) >> 40) & DRM_GEM_MAX_IDX)
281 #define DRM_GEM_MAPPING_OFF(i) (((uint64_t)(i)) << 40)
282 #define DRM_GEM_MAPPING_MAPOFF(o) \
283 ((o) & ~(DRM_GEM_MAPPING_OFF(DRM_GEM_MAX_IDX) | DRM_GEM_MAPPING_KEY))
285 SYSCTL_DECL(_hw_drm);
287 #define DRM_MAX(a,b) ((a)>(b)?(a):(b))
289 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
291 #define DRM_DEV_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
292 #define DRM_DEV_UID UID_ROOT
293 #define DRM_DEV_GID GID_WHEEL
295 #define DRM_CURPROC curthread
296 #define DRM_STRUCTPROC struct thread
297 #define DRM_LOCK(dev) lockmgr(&(dev)->struct_mutex, LK_EXCLUSIVE)
298 #define DRM_UNLOCK(dev) lockmgr(&(dev)->struct_mutex, LK_RELEASE)
299 #define DRM_LOCK_SLEEP(dev, chan, flags, msg, timeout) \
300 (lksleep((chan), &(dev)->struct_mutex, (flags), (msg), (timeout)))
301 #if defined(INVARIANTS)
302 #define DRM_LOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) != 0);
303 #define DRM_UNLOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) == 0);
305 #define DRM_LOCK_ASSERT(d)
306 #define DRM_UNLOCK_ASSERT(d)
309 #define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)
311 typedef void irqreturn_t;
312 #define IRQ_HANDLED /* nothing */
313 #define IRQ_NONE /* nothing */
315 #define drm_get_device_from_kdev(_kdev) (_kdev->si_drv1)
317 #define DRM_MTRR_WC MDF_WRITECOMBINE
319 int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
320 vm_memattr_t memattr);
321 void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
322 vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);
325 #define dev_dbg(dev, fmt, ...) do { \
326 if ((drm_debug& DRM_DEBUGBITS_KMS) != 0) { \
327 device_printf((dev), "debug: " fmt, ## __VA_ARGS__); \
331 typedef struct drm_pci_id_list
340 * Ioctl function type.
342 * \param inode device inode.
343 * \param file_priv DRM file private pointer.
344 * \param cmd command.
345 * \param arg argument.
347 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
348 struct drm_file *file_priv);
350 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
353 #define DRM_IOCTL_NR(n) ((n) & 0xff)
356 #define DRM_MASTER 0x2
357 #define DRM_ROOT_ONLY 0x4
358 #define DRM_CONTROL_ALLOW 0x8
359 #define DRM_UNLOCKED 0x10
360 #define DRM_RENDER_ALLOW 0x20
362 struct drm_ioctl_desc {
366 unsigned int cmd_drv;
371 * Creates a driver or general drm_ioctl_desc array entry for the given
372 * ioctl, for use by drm_ioctl().
374 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
375 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl}
377 typedef struct drm_magic_entry {
378 struct list_head head;
379 struct drm_hash_item hash_item;
380 struct drm_file *priv;
381 struct drm_magic_entry *next;
384 typedef struct drm_magic_head {
385 struct drm_magic_entry *head;
386 struct drm_magic_entry *tail;
389 /** bufs is one longer than it has to be */
390 struct drm_waitlist {
391 int count; /**< Number of possible buffers */
392 struct drm_buf **bufs; /**< List of pointers to buffers */
393 struct drm_buf **rp; /**< Read pointer */
394 struct drm_buf **wp; /**< Write pointer */
395 struct drm_buf **end; /**< End pointer */
396 struct spinlock *read_lock;
397 struct spinlock *write_lock;
400 /* Event queued up for userspace to read */
401 struct drm_pending_event {
402 struct drm_event *event;
403 struct list_head link;
404 struct drm_file *file_priv;
405 pid_t pid; /* pid of requester, no guarantee it's valid by the time
406 we deliver the event, for tracing only */
407 void (*destroy)(struct drm_pending_event *event);
410 /* initial implementaton using a linked list - todo hashtab */
411 struct drm_prime_file_private {
412 struct list_head head;
415 #endif /* DUMBBELL_WIP */
418 /** File private data */
421 struct drm_device *dev;
424 /* true when the client has asked us to expose stereo 3D mode flags */
427 * true if client understands CRTC primary planes and cursor planes
430 unsigned universal_planes:1;
431 /* true if client understands atomic properties */
437 unsigned long ioctl_count;
438 struct list_head lhead;
441 /** Mapping of mm object handles to object pointers. */
442 struct idr object_idr;
443 /** Lock for synchronization of access to object_idr. */
444 struct lock table_lock;
449 struct drm_master *masterp;
452 * fbs - List of framebuffers associated with this file.
454 * Protected by fbs_lock. Note that the fbs list holds a reference on
455 * the fb object to prevent it from untimely disappearing.
457 struct list_head fbs;
458 struct lock fbs_lock;
460 /** User-created blob properties; this retains a reference on the
462 struct list_head blobs;
464 wait_queue_head_t event_wait;
465 struct list_head event_list;
468 struct drm_prime_file_private prime;
474 struct drm_lock_data {
475 struct drm_hw_lock *hw_lock; /**< Hardware lock */
476 /** Private of lock holder's file (NULL=kernel) */
477 struct drm_file *file_priv;
478 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
479 unsigned long lock_time; /**< Time of last lock in jiffies */
483 * GEM specific mm private for tracking GEM objects
486 struct drm_vma_offset_manager vma_manager;
487 struct drm_mm offset_manager; /**< Offset mgmt for buffer objects */
488 struct drm_open_hash offset_hash; /**< User token hash table for maps */
489 struct unrhdr *idxunr;
493 * struct drm_master - drm master structure
495 * @refcount: Refcount for this master object.
496 * @minor: Link back to minor char device we are master for. Immutable.
497 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
498 * @unique_len: Length of unique field. Protected by drm_global_mutex.
499 * @unique_size: Amount allocated. Protected by drm_global_mutex.
500 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
501 * @magicfree: List of used authentication tokens. Protected by struct_mutex.
502 * @lock: DRI lock information.
503 * @driver_priv: Pointer to driver-private information.
506 struct kref refcount; /* refcount for this master */
507 struct list_head head; /**< each minor contains a list of masters */
508 struct drm_minor *minor; /**< link back to minor we are a master for */
509 char *unique; /**< Unique identifier: e.g., busid */
510 int unique_len; /**< Length of unique field */
511 int unique_size; /**< amount allocated */
512 int blocked; /**< Blocked due to VC switch? */
513 struct drm_open_hash magiclist;
514 struct list_head magicfree;
515 struct drm_lock_data lock;
519 /* Size of ringbuffer for vblank timestamps. Just double-buffer
520 * in initial implementation.
522 #define DRM_VBLANKTIME_RBSIZE 2
524 /* Flags and return codes for get_vblank_timestamp() driver function. */
525 #define DRM_CALLED_FROM_VBLIRQ 1
526 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
527 #define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
529 /* get_scanout_position() return flags */
530 #define DRM_SCANOUTPOS_VALID (1 << 0)
531 #define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
532 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
535 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : (1ULL<<(n)) - 1)
538 #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
541 * DRM driver structure. This structure represent the common code for
542 * a family of cards. There will one drm_device for each card present
546 int (*load) (struct drm_device *, unsigned long flags);
547 int (*use_msi) (struct drm_device *, unsigned long flags);
548 int (*firstopen) (struct drm_device *);
549 int (*open) (struct drm_device *, struct drm_file *);
550 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
551 void (*postclose) (struct drm_device *, struct drm_file *);
552 void (*lastclose) (struct drm_device *);
553 int (*unload) (struct drm_device *);
554 void (*reclaim_buffers_locked) (struct drm_device *,
555 struct drm_file *file_priv);
556 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
557 int (*dma_quiescent) (struct drm_device *);
558 int (*context_ctor) (struct drm_device *dev, int context);
559 int (*context_dtor) (struct drm_device *dev, int context);
562 * get_vblank_counter - get raw hardware vblank counter
564 * @crtc: counter to fetch
566 * Driver callback for fetching a raw hardware vblank counter for @crtc.
567 * If a device doesn't have a hardware counter, the driver can simply
568 * return the value of drm_vblank_count. The DRM core will account for
569 * missed vblank events while interrupts where disabled based on system
572 * Wraparound handling and loss of events due to modesetting is dealt
573 * with in the DRM core code.
576 * Raw vblank counter value.
578 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
581 * enable_vblank - enable vblank interrupt events
583 * @crtc: which irq to enable
585 * Enable vblank interrupts for @crtc. If the device doesn't have
586 * a hardware vblank counter, this routine should be a no-op, since
587 * interrupts will have to stay on to keep the count accurate.
590 * Zero on success, appropriate errno if the given @crtc's vblank
591 * interrupt cannot be enabled.
593 int (*enable_vblank) (struct drm_device *dev, int crtc);
596 * disable_vblank - disable vblank interrupt events
598 * @crtc: which irq to enable
600 * Disable vblank interrupts for @crtc. If the device doesn't have
601 * a hardware vblank counter, this routine should be a no-op, since
602 * interrupts will have to stay on to keep the count accurate.
604 void (*disable_vblank) (struct drm_device *dev, int crtc);
607 * Called by \c drm_device_is_agp. Typically used to determine if a
608 * card is really attached to AGP or not.
610 * \param dev DRM device handle
613 * One of three values is returned depending on whether or not the
614 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
615 * (return of 1), or may or may not be AGP (return of 2).
617 int (*device_is_agp) (struct drm_device *dev);
620 * Called by vblank timestamping code.
622 * Return the current display scanout position from a crtc, and an
623 * optional accurate ktime_get timestamp of when position was measured.
625 * \param dev DRM device.
626 * \param crtc Id of the crtc to query.
627 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
628 * \param *vpos Target location for current vertical scanout position.
629 * \param *hpos Target location for current horizontal scanout position.
630 * \param *stime Target location for timestamp taken immediately before
631 * scanout position query. Can be NULL to skip timestamp.
632 * \param *etime Target location for timestamp taken immediately after
633 * scanout position query. Can be NULL to skip timestamp.
635 * Returns vpos as a positive number while in active scanout area.
636 * Returns vpos as a negative number inside vblank, counting the number
637 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
638 * until start of active scanout / end of vblank."
640 * \return Flags, or'ed together as follows:
642 * DRM_SCANOUTPOS_VALID = Query successful.
643 * DRM_SCANOUTPOS_INVBL = Inside vblank.
644 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
645 * this flag means that returned position may be offset by a constant
646 * but unknown small number of scanlines wrt. real scanout position.
649 int (*get_scanout_position) (struct drm_device *dev, int crtc,
651 int *vpos, int *hpos, ktime_t *stime,
655 * Called by \c drm_get_last_vbltimestamp. Should return a precise
656 * timestamp when the most recent VBLANK interval ended or will end.
658 * Specifically, the timestamp in @vblank_time should correspond as
659 * closely as possible to the time when the first video scanline of
660 * the video frame after the end of VBLANK will start scanning out,
661 * the time immediately after end of the VBLANK interval. If the
662 * @crtc is currently inside VBLANK, this will be a time in the future.
663 * If the @crtc is currently scanning out a frame, this will be the
664 * past start time of the current scanout. This is meant to adhere
665 * to the OpenML OML_sync_control extension specification.
667 * \param dev dev DRM device handle.
668 * \param crtc crtc for which timestamp should be returned.
669 * \param *max_error Maximum allowable timestamp error in nanoseconds.
670 * Implementation should strive to provide timestamp
671 * with an error of at most *max_error nanoseconds.
672 * Returns true upper bound on error for timestamp.
673 * \param *vblank_time Target location for returned vblank timestamp.
674 * \param flags 0 = Defaults, no special treatment needed.
675 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
676 * irq handler. Some drivers need to apply some workarounds
677 * for gpu-specific vblank irq quirks if flag is set.
680 * Zero if timestamping isn't supported in current display mode or a
681 * negative number on failure. A positive status code on success,
682 * which describes how the vblank_time timestamp was computed.
684 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
686 struct timeval *vblank_time,
689 /* these have to be filled in */
691 void (*irq_handler) (void *arg);
692 void (*irq_preinstall) (struct drm_device *dev);
693 int (*irq_postinstall) (struct drm_device *dev);
694 void (*irq_uninstall) (struct drm_device *dev);
697 * Driver-specific constructor for drm_gem_objects, to set up
698 * obj->driver_private.
700 * Returns 0 on success.
702 void (*gem_free_object) (struct drm_gem_object *obj);
703 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
704 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
706 int (*sysctl_init) (struct drm_device *dev,
707 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
708 void (*sysctl_cleanup) (struct drm_device *dev);
710 drm_pci_id_list_t *id_entry; /* PCI ID, name, and chipset private */
712 /* dumb alloc support */
713 int (*dumb_create)(struct drm_file *file_priv,
714 struct drm_device *dev,
715 struct drm_mode_create_dumb *args);
716 int (*dumb_map_offset)(struct drm_file *file_priv,
717 struct drm_device *dev, uint32_t handle,
719 int (*dumb_destroy)(struct drm_file *file_priv,
720 struct drm_device *dev,
723 /* Driver private ops for this object */
724 struct cdev_pager_ops *gem_pager_ops;
729 const char *name; /* Simple driver name */
730 const char *desc; /* Longer driver name */
731 const char *date; /* Date of last major changes. */
735 const struct drm_ioctl_desc *ioctls;
740 * Info file list entry. This structure represents a debugfs or proc file to
741 * be created by the drm core
743 struct drm_info_list {
744 const char *name; /** file name */
745 int (*show)(struct seq_file*, void*); /** show callback */
746 u32 driver_features; /**< Required driver features for this entry */
751 * debugfs node structure. This structure represents a debugfs file.
753 struct drm_info_node {
754 struct list_head list;
755 struct drm_minor *minor;
756 const struct drm_info_list *info_ent;
761 * DRM minor structure. This structure represents a drm minor number.
764 int index; /**< Minor device number */
765 int type; /**< Control or render */
766 device_t kdev; /**< OS device */
767 struct drm_device *dev;
769 struct drm_master *master; /* currently active master for this node */
770 struct list_head master_list;
771 struct drm_mode_group mode_group;
774 struct drm_pending_vblank_event {
775 struct drm_pending_event base;
777 struct drm_event_vblank event;
780 struct drm_sysctl_info {
781 struct sysctl_ctx_list ctx;
785 /* Length for the array of resource pointers for drm_get_resource_*. */
786 #define DRM_MAX_PCI_RESOURCE 6
788 struct drm_vblank_crtc {
789 struct drm_device *dev; /* pointer to the drm_device */
790 wait_queue_head_t queue; /**< VBLANK wait queue */
791 struct timer_list disable_timer; /* delayed disable timer */
793 /* vblank counter, protected by dev->vblank_time_lock for writes */
795 /* vblank timestamps, protected by dev->vblank_time_lock for writes */
796 struct timeval time[DRM_VBLANKTIME_RBSIZE];
798 atomic_t refcount; /* number of users of vblank interruptsper crtc */
799 u32 last; /* protected by dev->vbl_lock, used */
800 /* for wraparound handling */
801 u32 last_wait; /* Last vblank seqno waited per CRTC */
802 unsigned int inmodeset; /* Display driver is setting mode */
803 unsigned int pipe; /* crtc index */
804 bool enabled; /* so we don't call enable more than
809 * DRM device structure. This structure represent a complete card that
810 * may contain multiple heads.
813 drm_pci_id_list_t *id_entry; /* PCI ID, name, and chipset private */
815 char *unique; /* Unique identifier: e.g., busid */
816 int unique_len; /* Length of unique field */
817 struct cdev *devnode; /* Device number for mknod */
818 int if_version; /* Highest interface version set */
820 int flags; /* Flags to open(2) */
823 struct spinlock dma_lock; /* protects dev->dma */
824 struct lwkt_serialize irq_lock; /* protects irq condition checks */
825 struct lock dev_lock; /* protects everything else */
829 struct lock struct_mutex; /**< For others */
830 struct lock master_mutex; /**< For drm_minor::master */
833 /** \name Usage Counters */
835 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
836 struct spinlock buf_lock; /**< For drm_device::buf_use and a few other things. */
837 int buf_use; /**< Buffers in use -- cannot alloc */
838 atomic_t buf_alloc; /**< Buffer allocation in progress */
842 /** \name Performance counters */
844 unsigned long counters;
845 enum drm_stat_type types[15];
850 struct drm_open_hash magiclist; /**< magic hash table */
851 struct list_head magicfree;
853 struct list_head filelist;
855 /** \name Memory management */
857 struct list_head maplist; /**< Linked list of regions */
858 int map_count; /**< Number of mappable regions */
859 struct drm_open_hash map_hash; /**< User token hash table for maps */
861 /** \name Context handle management */
863 struct list_head ctxlist; /**< Linked list of context handles */
864 int ctx_count; /**< Number of context handles */
865 struct lock ctxlist_mutex; /**< For ctxlist */
871 struct drm_lock_data lock; /* Information on hardware lock */
873 /** \name DMA support */
875 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
878 int irq_type; /* IRQ type (MSI enabled or not) */
879 int irqrid; /* Interrupt used by board */
880 struct resource *irqr; /* Resource for interrupt used by board */
881 void *irqh; /* Handle from bus_setup_intr */
883 /* Storage of resource pointers for drm_get_resource_* */
884 struct resource *pcir[DRM_MAX_PCI_RESOURCE];
885 int pcirid[DRM_MAX_PCI_RESOURCE];
892 /** \name Context support */
895 __volatile__ long context_flag; /**< Context swapping flag */
896 __volatile__ long interrupt_flag; /**< Interruption handler flag */
897 __volatile__ long dma_flag; /**< DMA dispatch flag */
898 wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
899 int last_checked; /**< Last context checked for DMA */
900 int last_context; /**< Last current context */
901 unsigned long last_switch; /**< jiffies at last context switch */
904 /** \name VBLANK IRQ support */
906 int irq_enabled; /**< True if irq handler is enabled */
907 int irq; /* Interrupt used by board */
910 * At load time, disabling the vblank interrupt won't be allowed since
911 * old clients may not call the modeset ioctl and therefore misbehave.
912 * Once the modeset ioctl *has* been called though, we can safely
913 * disable them when unused.
915 bool vblank_disable_allowed;
918 * If true, vblank interrupt will be disabled immediately when the
919 * refcount drops to zero, as opposed to via the vblank disable
921 * This can be set to true it the hardware has a working vblank
922 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
925 bool vblank_disable_immediate;
927 /* array of size num_crtcs */
928 struct drm_vblank_crtc *vblank;
930 struct lock vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
931 struct lock vbl_lock;
932 struct timer_list vblank_disable_timer;
934 u32 max_vblank_count; /**< size of vblank counter register */
939 struct list_head vblank_event_list;
940 struct lock event_lock;
944 struct sigio *buf_sigio; /* Processes waiting for SIGIO */
947 struct drm_sysctl_info *sysctl;
950 struct drm_sg_mem *sg; /**< Scatter gather memory */
951 unsigned int num_crtcs; /**< Number of CRTCs on this device */
953 unsigned long *ctx_bitmap;
960 struct drm_agp_head *agp; /**< AGP data */
962 struct device *dev; /**< Device structure */
963 struct pci_dev *pdev; /**< PCI device structure */
965 struct drm_driver *driver;
966 struct drm_local_map *agp_buffer_map;
967 unsigned int agp_buffer_token;
968 struct drm_minor *control; /**< Control node for card */
969 struct drm_minor *primary; /**< render type primary screen head */
971 struct drm_mode_config mode_config; /**< Current mode config */
973 /** \name GEM information */
975 struct lock object_name_lock;
976 struct idr object_name_idr;
980 void *sysctl_private;
984 int switch_power_state;
986 atomic_t unplugged; /* device has been unplugged or gone away */
989 #define DRM_SWITCH_POWER_ON 0
990 #define DRM_SWITCH_POWER_OFF 1
991 #define DRM_SWITCH_POWER_CHANGING 2
992 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
994 static __inline__ int drm_core_check_feature(struct drm_device *dev,
997 return ((dev->driver->driver_features & feature) ? 1 : 0);
1000 static inline void drm_device_set_unplugged(struct drm_device *dev)
1003 atomic_set(&dev->unplugged, 1);
1006 static inline int drm_device_is_unplugged(struct drm_device *dev)
1008 int ret = atomic_read(&dev->unplugged);
1013 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1015 return 0 /* file_priv->minor->type == DRM_MINOR_LEGACY */;
1019 * drm_is_master() - Check whether a DRM open-file is DRM-Master
1020 * @file: DRM open-file context
1022 * This checks whether a DRM open-file context is owner of the master context
1023 * attached to it. If a file owns a master context, it's called DRM-Master.
1024 * Per DRM device, only one such file can be DRM-Master at a time.
1026 * Returns: True if the file is DRM-Master, otherwise false.
1028 static inline bool drm_is_master(const struct drm_file *file)
1031 return file->master && file->master == file->minor->master;
1037 /******************************************************************/
1038 /** \name Internal function definitions */
1042 static inline int drm_core_has_AGP(struct drm_device *dev)
1044 return drm_core_check_feature(dev, DRIVER_USE_AGP);
1047 #define drm_core_has_AGP(dev) (0)
1050 extern unsigned int drm_rnodes;
1051 extern unsigned int drm_universal_planes;
1053 extern int drm_vblank_offdelay;
1054 extern unsigned int drm_timestamp_precision;
1056 /* Driver support (drm_drv.h) */
1057 extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
1058 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist);
1059 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist);
1060 int drm_create_cdevs(device_t kdev);
1061 d_ioctl_t drm_ioctl;
1062 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
1064 /* Device support (drm_fops.h) */
1066 d_close_t drm_close;
1068 d_kqfilter_t drm_kqfilter;
1069 int drm_release(device_t kdev);
1072 d_mmap_single_t drm_mmap_single;
1074 void drm_cdevpriv_dtor(void *cd);
1076 int drm_add_busid_modesetting(struct drm_device *dev,
1077 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
1079 /* File operations helpers (drm_fops.c) */
1080 extern int drm_open_helper(struct cdev *kdev, int flags, int fmt,
1082 struct drm_device *dev,
1084 extern struct drm_file *drm_find_file_by_proc(struct drm_device *dev,
1088 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1089 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1091 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1092 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1094 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1095 struct drm_file *file_priv);
1096 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1097 struct drm_file *file_priv);
1099 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, vm_page_t *pages,
1100 dma_addr_t *addrs, int max_pages);
1101 #endif /* DUMBBELL_WIP */
1102 extern struct sg_table *drm_prime_pages_to_sg(vm_page_t *pages, int nr_pages);
1103 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1106 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1107 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1108 int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
1109 int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
1110 void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1112 int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
1113 int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
1114 struct drm_gem_object **obj);
1115 #endif /* DUMBBELL_WIP */
1117 int drm_mtrr_add(unsigned long offset, size_t size, int flags);
1118 int drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags);
1121 * These are exported to drivers so that they can implement fencing using
1122 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1125 unsigned long drm_get_resource_start(struct drm_device *dev,
1126 unsigned int resource);
1127 unsigned long drm_get_resource_len(struct drm_device *dev,
1128 unsigned int resource);
1130 /* IRQ support (drm_irq.h) */
1131 extern int drm_irq_install(struct drm_device *dev, int irq);
1132 extern int drm_irq_uninstall(struct drm_device *dev);
1134 extern int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs);
1135 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1136 struct drm_file *filp);
1137 extern u32 drm_vblank_count(struct drm_device *dev, int pipe);
1138 extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
1139 extern u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
1140 struct timeval *vblanktime);
1141 extern void drm_send_vblank_event(struct drm_device *dev, unsigned int pipe,
1142 struct drm_pending_vblank_event *e);
1143 extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
1144 struct drm_pending_vblank_event *e);
1145 extern bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe);
1146 extern bool drm_crtc_handle_vblank(struct drm_crtc *crtc);
1147 extern int drm_vblank_get(struct drm_device *dev, unsigned int pipe);
1148 extern void drm_vblank_put(struct drm_device *dev, unsigned int pipe);
1149 extern int drm_crtc_vblank_get(struct drm_crtc *crtc);
1150 extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
1151 extern void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe);
1152 extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
1153 extern void drm_vblank_off(struct drm_device *dev, unsigned int pipe);
1154 extern void drm_vblank_on(struct drm_device *dev, unsigned int pipe);
1155 extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
1156 extern void drm_crtc_vblank_reset(struct drm_crtc *crtc);
1157 extern void drm_crtc_vblank_on(struct drm_crtc *crtc);
1158 extern void drm_vblank_cleanup(struct drm_device *dev);
1160 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1161 unsigned int pipe, int *max_error,
1162 struct timeval *vblank_time,
1164 const struct drm_crtc *refcrtc,
1165 const struct drm_display_mode *mode);
1166 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1167 const struct drm_display_mode *mode);
1170 * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
1171 * @crtc: which CRTC's vblank waitqueue to retrieve
1173 * This function returns a pointer to the vblank waitqueue for the CRTC.
1174 * Drivers can use this to implement vblank waits using wait_event() & co.
1176 static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
1178 return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
1181 /* Modesetting support */
1182 extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
1183 extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
1185 /* sysctl support (drm_sysctl.h) */
1186 extern int drm_sysctl_init(struct drm_device *dev);
1187 extern int drm_sysctl_cleanup(struct drm_device *dev);
1189 /* Locking IOCTL support (drm_drv.c) */
1190 int drm_lock(struct drm_device *dev, void *data,
1191 struct drm_file *file_priv);
1192 int drm_unlock(struct drm_device *dev, void *data,
1193 struct drm_file *file_priv);
1194 int drm_setversion(struct drm_device *dev, void *data,
1195 struct drm_file *file_priv);
1198 * These are exported to drivers so that they can implement fencing using
1199 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1202 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1204 /* Misc. IOCTL support (drm_ioctl.c) */
1205 int drm_noop(struct drm_device *dev, void *data,
1206 struct drm_file *file_priv);
1208 /* Cache management (drm_cache.c) */
1209 void drm_clflush_pages(struct vm_page *pages[], unsigned long num_pages);
1210 void drm_clflush_sg(struct sg_table *st);
1211 void drm_clflush_virt_range(void *addr, unsigned long length);
1213 /* DMA support (drm_dma.c) */
1214 int drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv);
1216 /* Stub support (drm_stub.h) */
1218 extern void drm_put_dev(struct drm_device *dev);
1219 extern void drm_unplug_dev(struct drm_device *dev);
1220 extern unsigned int drm_debug;
1221 extern bool drm_atomic;
1223 /* Scatter Gather Support (drm_scatter.c) */
1224 int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1225 struct drm_file *file_priv);
1226 int drm_sg_free(struct drm_device *dev, void *data,
1227 struct drm_file *file_priv);
1229 /* consistent PCI memory functions (drm_pci.c) */
1230 extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
1232 void drm_pci_free(struct drm_device *dev, struct drm_dma_handle *dmah);
1234 /* sysfs support (drm_sysfs.c) */
1235 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1237 int drm_gem_mmap_single(struct drm_device *dev, vm_ooffset_t *offset,
1238 vm_size_t size, struct vm_object **obj_res, int nprot);
1239 void drm_gem_pager_dtr(void *obj);
1241 struct ttm_bo_device;
1242 int ttm_bo_mmap_single(struct ttm_bo_device *bdev, vm_ooffset_t *offset,
1243 vm_size_t size, struct vm_object **obj_res, int nprot);
1244 struct ttm_buffer_object;
1245 void ttm_bo_release_mmap(struct ttm_buffer_object *bo);
1247 void drm_device_lock_mtx(struct drm_device *dev);
1248 void drm_device_unlock_mtx(struct drm_device *dev);
1249 int drm_device_sleep_mtx(struct drm_device *dev, void *chan, int flags,
1250 const char *msg, int timeout);
1251 void drm_device_assert_mtx_locked(struct drm_device *dev);
1252 void drm_device_assert_mtx_unlocked(struct drm_device *dev);
1254 void drm_device_lock_struct(struct drm_device *dev);
1255 void drm_device_unlock_struct(struct drm_device *dev);
1256 int drm_device_sleep_struct(struct drm_device *dev, void *chan, int flags,
1257 const char *msg, int timeout);
1258 void drm_device_assert_struct_locked(struct drm_device *dev);
1259 void drm_device_assert_struct_unlocked(struct drm_device *dev);
1261 void drm_compat_locking_init(struct drm_device *dev);
1262 void drm_sleep_locking_init(struct drm_device *dev);
1264 /* XXX glue logic, should be done in drm_pci_init(), pending drm update */
1265 void drm_init_pdev(struct device *dev, struct pci_dev **pdev);
1266 void drm_fini_pdev(struct pci_dev **pdev);
1268 /* Inline replacements for drm_alloc and friends */
1269 static __inline__ void *
1270 drm_alloc(size_t size, struct malloc_type *area)
1272 return kmalloc(size, area, M_WAITOK | M_NULLOK);
1275 static __inline__ void *
1276 drm_calloc(size_t nmemb, size_t size, struct malloc_type *area)
1278 return kmalloc(size * nmemb, area, M_WAITOK | M_NULLOK | M_ZERO);
1281 static __inline__ void
1282 drm_free(void *pt, struct malloc_type *area)
1284 /* kfree is special!!! */
1289 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1290 struct device *parent);
1291 void drm_dev_ref(struct drm_device *dev);
1292 void drm_dev_unref(struct drm_device *dev);
1293 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1294 void drm_dev_unregister(struct drm_device *dev);
1295 int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);
1297 /* FreeBSD compatibility macros */
1298 #define VM_OBJECT_WLOCK(object) VM_OBJECT_LOCK(object)
1299 #define VM_OBJECT_WUNLOCK(object) VM_OBJECT_UNLOCK(object)
1302 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1304 if (dev->driver->device_is_agp != NULL) {
1305 int err = (*dev->driver->device_is_agp) (dev);
1312 return (pci_find_extcap(dev->dev, PCIY_AGP, NULL) == 0);
1315 #define DRM_PCIE_SPEED_25 1
1316 #define DRM_PCIE_SPEED_50 2
1317 #define DRM_PCIE_SPEED_80 4
1319 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1322 #define drm_can_sleep() (HZ & 1)
1324 #endif /* __KERNEL__ */
1325 #endif /* _DRM_P_H_ */