2 * Internal Header for the Direct Rendering Manager
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
6 * Copyright (c) 2009-2010, Code Aurora Forum.
9 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
10 * Author: Gareth Hughes <gareth@valinux.com>
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
19 * The above copyright notice and this permission notice (including the next
20 * paragraph) shall be included in all copies or substantial portions of the
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
27 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
28 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
29 * OTHER DEALINGS IN THE SOFTWARE.
35 #include <linux/agp_backend.h>
36 #include <linux/cdev.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/file.h>
40 #include <linux/highmem.h>
41 #include <linux/idr.h>
42 #include <linux/init.h>
44 #include <linux/jiffies.h>
45 #include <linux/kernel.h>
46 #include <linux/kref.h>
47 #include <linux/miscdevice.h>
49 #include <linux/mutex.h>
50 #include <linux/pci.h>
51 #include <linux/platform_device.h>
52 #include <linux/poll.h>
53 #include <linux/ratelimit.h>
54 #include <linux/sched.h>
55 #include <linux/slab.h>
56 #include <linux/types.h>
57 #include <linux/vmalloc.h>
58 #include <linux/workqueue.h>
59 #include <linux/fence.h>
62 #include <asm/pgalloc.h>
63 #include <asm/uaccess.h>
65 #include <uapi/drm/drm.h>
66 #include <uapi/drm/drm_mode.h>
68 #include <drm/drm_agpsupport.h>
69 #include <drm/drm_crtc.h>
70 #include <drm/drm_fourcc.h>
71 #include <drm/drm_global.h>
72 #include <drm/drm_hashtab.h>
73 #include <drm/drm_mem_util.h>
74 #include <drm/drm_mm.h>
75 #include <drm/drm_os_linux.h>
76 #include <drm/drm_sarea.h>
77 #include <drm/drm_vma_manager.h>
85 struct drm_device_dma;
86 struct drm_dma_handle;
87 struct drm_gem_object;
89 struct drm_vblank_crtc;
93 struct reservation_object;
94 struct dma_buf_attachment;
97 * The following categories are defined:
99 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
100 * This is the category used by the DRM_DEBUG() macro.
102 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
103 * This is the category used by the DRM_DEBUG_DRIVER() macro.
105 * KMS: used in the modesetting code.
106 * This is the category used by the DRM_DEBUG_KMS() macro.
108 * PRIME: used in the prime code.
109 * This is the category used by the DRM_DEBUG_PRIME() macro.
111 * ATOMIC: used in the atomic code.
112 * This is the category used by the DRM_DEBUG_ATOMIC() macro.
114 * VBL: used for verbose debug message in the vblank code
115 * This is the category used by the DRM_DEBUG_VBL() macro.
117 * Enabling verbose debug messages is done through the drm.debug parameter,
118 * each category being enabled by a bit.
120 * drm.debug=0x1 will enable CORE messages
121 * drm.debug=0x2 will enable DRIVER messages
122 * drm.debug=0x3 will enable CORE and DRIVER messages
124 * drm.debug=0x3f will enable all messages
126 * An interesting feature is that it's possible to enable verbose logging at
127 * run-time by echoing the debug value in its sysfs node:
128 * # echo 0xf > /sys/module/drm/parameters/debug
130 #define DRM_UT_CORE 0x01
131 #define DRM_UT_DRIVER 0x02
132 #define DRM_UT_KMS 0x04
133 #define DRM_UT_PRIME 0x08
134 #define DRM_UT_ATOMIC 0x10
135 #define DRM_UT_VBL 0x20
137 extern __printf(2, 3)
138 void drm_ut_debug_printk(const char *function_name,
139 const char *format, ...);
140 extern __printf(1, 2)
141 void drm_err(const char *format, ...);
143 /***********************************************************************/
144 /** \name DRM template customization defaults */
147 /* driver capabilities and requirements mask */
148 #define DRIVER_USE_AGP 0x1
149 #define DRIVER_LEGACY 0x2
150 #define DRIVER_PCI_DMA 0x8
151 #define DRIVER_SG 0x10
152 #define DRIVER_HAVE_DMA 0x20
153 #define DRIVER_HAVE_IRQ 0x40
154 #define DRIVER_IRQ_SHARED 0x80
155 #define DRIVER_GEM 0x1000
156 #define DRIVER_MODESET 0x2000
157 #define DRIVER_PRIME 0x4000
158 #define DRIVER_RENDER 0x8000
159 #define DRIVER_ATOMIC 0x10000
160 #define DRIVER_KMS_LEGACY_CONTEXT 0x20000
162 /***********************************************************************/
163 /** \name Macros to make printk easier */
169 * \param fmt printf() like format string.
170 * \param arg arguments
172 #define DRM_ERROR(fmt, ...) \
173 drm_err(fmt, ##__VA_ARGS__)
176 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
178 * \param fmt printf() like format string.
179 * \param arg arguments
181 #define DRM_ERROR_RATELIMITED(fmt, ...) \
183 static DEFINE_RATELIMIT_STATE(_rs, \
184 DEFAULT_RATELIMIT_INTERVAL, \
185 DEFAULT_RATELIMIT_BURST); \
187 if (__ratelimit(&_rs)) \
188 drm_err(fmt, ##__VA_ARGS__); \
191 #define DRM_INFO(fmt, ...) \
192 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
194 #define DRM_INFO_ONCE(fmt, ...) \
195 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
200 * \param fmt printf() like format string.
201 * \param arg arguments
203 #define DRM_DEBUG(fmt, args...) \
205 if (unlikely(drm_debug & DRM_UT_CORE)) \
206 drm_ut_debug_printk(__func__, fmt, ##args); \
209 #define DRM_DEBUG_DRIVER(fmt, args...) \
211 if (unlikely(drm_debug & DRM_UT_DRIVER)) \
212 drm_ut_debug_printk(__func__, fmt, ##args); \
214 #define DRM_DEBUG_KMS(fmt, args...) \
216 if (unlikely(drm_debug & DRM_UT_KMS)) \
217 drm_ut_debug_printk(__func__, fmt, ##args); \
219 #define DRM_DEBUG_PRIME(fmt, args...) \
221 if (unlikely(drm_debug & DRM_UT_PRIME)) \
222 drm_ut_debug_printk(__func__, fmt, ##args); \
224 #define DRM_DEBUG_ATOMIC(fmt, args...) \
226 if (unlikely(drm_debug & DRM_UT_ATOMIC)) \
227 drm_ut_debug_printk(__func__, fmt, ##args); \
229 #define DRM_DEBUG_VBL(fmt, args...) \
231 if (unlikely(drm_debug & DRM_UT_VBL)) \
232 drm_ut_debug_printk(__func__, fmt, ##args); \
235 #define _DRM_DEFINE_DEBUG_RATELIMITED(level, fmt, args...) \
237 if (unlikely(drm_debug & DRM_UT_ ## level)) { \
238 static DEFINE_RATELIMIT_STATE( \
240 DEFAULT_RATELIMIT_INTERVAL, \
241 DEFAULT_RATELIMIT_BURST); \
243 if (__ratelimit(&_rs)) { \
244 drm_ut_debug_printk(__func__, fmt, \
251 * Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
253 * \param fmt printf() like format string.
254 * \param arg arguments
256 #define DRM_DEBUG_RATELIMITED(fmt, args...) \
257 _DRM_DEFINE_DEBUG_RATELIMITED(CORE, fmt, ##args)
258 #define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...) \
259 _DRM_DEFINE_DEBUG_RATELIMITED(DRIVER, fmt, ##args)
260 #define DRM_DEBUG_KMS_RATELIMITED(fmt, args...) \
261 _DRM_DEFINE_DEBUG_RATELIMITED(KMS, fmt, ##args)
262 #define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...) \
263 _DRM_DEFINE_DEBUG_RATELIMITED(PRIME, fmt, ##args)
267 /***********************************************************************/
268 /** \name Internal types and structures */
271 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
274 * Ioctl function type.
276 * \param inode device inode.
277 * \param file_priv DRM file private pointer.
278 * \param cmd command.
279 * \param arg argument.
281 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
282 struct drm_file *file_priv);
284 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
287 #define DRM_IOCTL_NR(n) _IOC_NR(n)
288 #define DRM_MAJOR 226
291 #define DRM_MASTER 0x2
292 #define DRM_ROOT_ONLY 0x4
293 #define DRM_CONTROL_ALLOW 0x8
294 #define DRM_UNLOCKED 0x10
295 #define DRM_RENDER_ALLOW 0x20
297 struct drm_ioctl_desc {
305 * Creates a driver or general drm_ioctl_desc array entry for the given
306 * ioctl, for use by drm_ioctl().
309 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
310 [DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = { \
311 .cmd = DRM_IOCTL_##ioctl, \
317 /* Event queued up for userspace to read */
318 struct drm_pending_event {
319 struct completion *completion;
320 struct drm_event *event;
322 struct list_head link;
323 struct list_head pending_link;
324 struct drm_file *file_priv;
325 pid_t pid; /* pid of requester, no guarantee it's valid by the time
326 we deliver the event, for tracing only */
329 /* initial implementaton using a linked list - todo hashtab */
330 struct drm_prime_file_private {
331 struct list_head head;
335 /** File private data */
337 unsigned authenticated :1;
338 /* true when the client has asked us to expose stereo 3D mode flags */
339 unsigned stereo_allowed :1;
341 * true if client understands CRTC primary planes and cursor planes
344 unsigned universal_planes:1;
345 /* true if client understands atomic properties */
348 * This client is the creator of @master.
349 * Protected by struct drm_device::master_mutex.
351 unsigned is_master:1;
356 struct list_head lhead;
357 struct drm_minor *minor;
358 unsigned long lock_count;
360 /** Mapping of mm object handles to object pointers. */
361 struct idr object_idr;
362 /** Lock for synchronization of access to object_idr. */
363 spinlock_t table_lock;
368 struct drm_master *master; /* master this node is currently associated with
369 N.B. not always dev->master */
371 * fbs - List of framebuffers associated with this file.
373 * Protected by fbs_lock. Note that the fbs list holds a reference on
374 * the fb object to prevent it from untimely disappearing.
376 struct list_head fbs;
377 struct mutex fbs_lock;
379 /** User-created blob properties; this retains a reference on the
381 struct list_head blobs;
383 wait_queue_head_t event_wait;
384 struct list_head pending_event_list;
385 struct list_head event_list;
388 struct mutex event_read_lock;
390 struct drm_prime_file_private prime;
396 struct drm_lock_data {
397 struct drm_hw_lock *hw_lock; /**< Hardware lock */
398 /** Private of lock holder's file (NULL=kernel) */
399 struct drm_file *file_priv;
400 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
401 unsigned long lock_time; /**< Time of last lock in jiffies */
403 uint32_t kernel_waiters;
404 uint32_t user_waiters;
408 /* Flags and return codes for get_vblank_timestamp() driver function. */
409 #define DRM_CALLED_FROM_VBLIRQ 1
410 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
411 #define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
413 /* get_scanout_position() return flags */
414 #define DRM_SCANOUTPOS_VALID (1 << 0)
415 #define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
416 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
419 * DRM driver structure. This structure represent the common code for
420 * a family of cards. There will one drm_device for each card present
424 int (*load) (struct drm_device *, unsigned long flags);
425 int (*firstopen) (struct drm_device *);
426 int (*open) (struct drm_device *, struct drm_file *);
427 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
428 void (*postclose) (struct drm_device *, struct drm_file *);
429 void (*lastclose) (struct drm_device *);
430 int (*unload) (struct drm_device *);
431 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
432 int (*dma_quiescent) (struct drm_device *);
433 int (*context_dtor) (struct drm_device *dev, int context);
434 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
437 * get_vblank_counter - get raw hardware vblank counter
439 * @pipe: counter to fetch
441 * Driver callback for fetching a raw hardware vblank counter for @crtc.
442 * If a device doesn't have a hardware counter, the driver can simply
443 * use drm_vblank_no_hw_counter() function. The DRM core will account for
444 * missed vblank events while interrupts where disabled based on system
447 * Wraparound handling and loss of events due to modesetting is dealt
448 * with in the DRM core code.
451 * Raw vblank counter value.
453 u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe);
456 * enable_vblank - enable vblank interrupt events
458 * @pipe: which irq to enable
460 * Enable vblank interrupts for @crtc. If the device doesn't have
461 * a hardware vblank counter, the driver should use the
462 * drm_vblank_no_hw_counter() function that keeps a virtual counter.
465 * Zero on success, appropriate errno if the given @crtc's vblank
466 * interrupt cannot be enabled.
468 int (*enable_vblank) (struct drm_device *dev, unsigned int pipe);
471 * disable_vblank - disable vblank interrupt events
473 * @pipe: which irq to enable
475 * Disable vblank interrupts for @crtc. If the device doesn't have
476 * a hardware vblank counter, the driver should use the
477 * drm_vblank_no_hw_counter() function that keeps a virtual counter.
479 void (*disable_vblank) (struct drm_device *dev, unsigned int pipe);
482 * Called by \c drm_device_is_agp. Typically used to determine if a
483 * card is really attached to AGP or not.
485 * \param dev DRM device handle
488 * One of three values is returned depending on whether or not the
489 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
490 * (return of 1), or may or may not be AGP (return of 2).
492 int (*device_is_agp) (struct drm_device *dev);
495 * Called by vblank timestamping code.
497 * Return the current display scanout position from a crtc, and an
498 * optional accurate ktime_get timestamp of when position was measured.
500 * \param dev DRM device.
501 * \param pipe Id of the crtc to query.
502 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
503 * \param *vpos Target location for current vertical scanout position.
504 * \param *hpos Target location for current horizontal scanout position.
505 * \param *stime Target location for timestamp taken immediately before
506 * scanout position query. Can be NULL to skip timestamp.
507 * \param *etime Target location for timestamp taken immediately after
508 * scanout position query. Can be NULL to skip timestamp.
509 * \param mode Current display timings.
511 * Returns vpos as a positive number while in active scanout area.
512 * Returns vpos as a negative number inside vblank, counting the number
513 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
514 * until start of active scanout / end of vblank."
516 * \return Flags, or'ed together as follows:
518 * DRM_SCANOUTPOS_VALID = Query successful.
519 * DRM_SCANOUTPOS_INVBL = Inside vblank.
520 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
521 * this flag means that returned position may be offset by a constant
522 * but unknown small number of scanlines wrt. real scanout position.
525 int (*get_scanout_position) (struct drm_device *dev, unsigned int pipe,
526 unsigned int flags, int *vpos, int *hpos,
527 ktime_t *stime, ktime_t *etime,
528 const struct drm_display_mode *mode);
531 * Called by \c drm_get_last_vbltimestamp. Should return a precise
532 * timestamp when the most recent VBLANK interval ended or will end.
534 * Specifically, the timestamp in @vblank_time should correspond as
535 * closely as possible to the time when the first video scanline of
536 * the video frame after the end of VBLANK will start scanning out,
537 * the time immediately after end of the VBLANK interval. If the
538 * @crtc is currently inside VBLANK, this will be a time in the future.
539 * If the @crtc is currently scanning out a frame, this will be the
540 * past start time of the current scanout. This is meant to adhere
541 * to the OpenML OML_sync_control extension specification.
543 * \param dev dev DRM device handle.
544 * \param pipe crtc for which timestamp should be returned.
545 * \param *max_error Maximum allowable timestamp error in nanoseconds.
546 * Implementation should strive to provide timestamp
547 * with an error of at most *max_error nanoseconds.
548 * Returns true upper bound on error for timestamp.
549 * \param *vblank_time Target location for returned vblank timestamp.
550 * \param flags 0 = Defaults, no special treatment needed.
551 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
552 * irq handler. Some drivers need to apply some workarounds
553 * for gpu-specific vblank irq quirks if flag is set.
556 * Zero if timestamping isn't supported in current display mode or a
557 * negative number on failure. A positive status code on success,
558 * which describes how the vblank_time timestamp was computed.
560 int (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe,
562 struct timeval *vblank_time,
565 /* these have to be filled in */
567 irqreturn_t(*irq_handler) (int irq, void *arg);
568 void (*irq_preinstall) (struct drm_device *dev);
569 int (*irq_postinstall) (struct drm_device *dev);
570 void (*irq_uninstall) (struct drm_device *dev);
572 /* Master routines */
573 int (*master_create)(struct drm_device *dev, struct drm_master *master);
574 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
576 * master_set is called whenever the minor master is set.
577 * master_drop is called whenever the minor master is dropped.
580 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
582 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
584 int (*debugfs_init)(struct drm_minor *minor);
585 void (*debugfs_cleanup)(struct drm_minor *minor);
588 * @gem_free_object: deconstructor for drm_gem_objects
590 * This is deprecated and should not be used by new drivers. Use
591 * @gem_free_object_unlocked instead.
593 void (*gem_free_object) (struct drm_gem_object *obj);
596 * @gem_free_object_unlocked: deconstructor for drm_gem_objects
598 * This is for drivers which are not encumbered with dev->struct_mutex
599 * legacy locking schemes. Use this hook instead of @gem_free_object.
601 void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
603 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
604 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
607 * Hook for allocating the GEM object struct, for use by core
610 struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
614 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
615 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
616 uint32_t handle, uint32_t flags, int *prime_fd);
617 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
618 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
619 int prime_fd, uint32_t *handle);
620 /* export GEM -> dmabuf */
621 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
622 struct drm_gem_object *obj, int flags);
623 /* import dmabuf -> GEM */
624 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
625 struct dma_buf *dma_buf);
626 /* low-level interface used by drm_gem_prime_{import,export} */
627 int (*gem_prime_pin)(struct drm_gem_object *obj);
628 void (*gem_prime_unpin)(struct drm_gem_object *obj);
629 struct reservation_object * (*gem_prime_res_obj)(
630 struct drm_gem_object *obj);
631 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
632 struct drm_gem_object *(*gem_prime_import_sg_table)(
633 struct drm_device *dev,
634 struct dma_buf_attachment *attach,
635 struct sg_table *sgt);
636 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
637 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
638 int (*gem_prime_mmap)(struct drm_gem_object *obj,
639 struct vm_area_struct *vma);
641 /* vga arb irq handler */
642 void (*vgaarb_irq)(struct drm_device *dev, bool state);
644 /* dumb alloc support */
645 int (*dumb_create)(struct drm_file *file_priv,
646 struct drm_device *dev,
647 struct drm_mode_create_dumb *args);
648 int (*dumb_map_offset)(struct drm_file *file_priv,
649 struct drm_device *dev, uint32_t handle,
651 int (*dumb_destroy)(struct drm_file *file_priv,
652 struct drm_device *dev,
655 /* Driver private ops for this object */
656 const struct vm_operations_struct *gem_vm_ops;
667 const struct drm_ioctl_desc *ioctls;
669 const struct file_operations *fops;
671 /* List of devices hanging off this driver with stealth attach. */
672 struct list_head legacy_dev_list;
675 enum drm_minor_type {
683 * Info file list entry. This structure represents a debugfs or proc file to
684 * be created by the drm core
686 struct drm_info_list {
687 const char *name; /** file name */
688 int (*show)(struct seq_file*, void*); /** show callback */
689 u32 driver_features; /**< Required driver features for this entry */
694 * debugfs node structure. This structure represents a debugfs file.
696 struct drm_info_node {
697 struct list_head list;
698 struct drm_minor *minor;
699 const struct drm_info_list *info_ent;
704 * DRM minor structure. This structure represents a drm minor number.
707 int index; /**< Minor device number */
708 int type; /**< Control or render */
709 struct device *kdev; /**< Linux device */
710 struct drm_device *dev;
712 struct dentry *debugfs_root;
714 struct list_head debugfs_list;
715 struct mutex debugfs_lock; /* Protects debugfs_list. */
719 * DRM device structure. This structure represent a complete card that
720 * may contain multiple heads.
723 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
724 int if_version; /**< Highest interface version set */
726 /** \name Lifetime Management */
728 struct kref ref; /**< Object ref-count */
729 struct device *dev; /**< Device structure of bus-device */
730 struct drm_driver *driver; /**< DRM driver managing the device */
731 void *dev_private; /**< DRM driver private data */
732 struct drm_minor *control; /**< Control node */
733 struct drm_minor *primary; /**< Primary node */
734 struct drm_minor *render; /**< Render node */
736 /* currently active master for this device. Protected by master_mutex */
737 struct drm_master *master;
739 atomic_t unplugged; /**< Flag whether dev is dead */
740 struct inode *anon_inode; /**< inode for private address-space */
741 char *unique; /**< unique name of the device */
746 struct mutex struct_mutex; /**< For others */
747 struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
750 /** \name Usage Counters */
752 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
753 spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
754 int buf_use; /**< Buffers in use -- cannot alloc */
755 atomic_t buf_alloc; /**< Buffer allocation in progress */
758 struct mutex filelist_mutex;
759 struct list_head filelist;
761 /** \name Memory management */
763 struct list_head maplist; /**< Linked list of regions */
764 struct drm_open_hash map_hash; /**< User token hash table for maps */
766 /** \name Context handle management */
768 struct list_head ctxlist; /**< Linked list of context handles */
769 struct mutex ctxlist_mutex; /**< For ctxlist */
773 struct list_head vmalist; /**< List of vmas (for debugging) */
777 /** \name DMA support */
779 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
782 /** \name Context support */
785 __volatile__ long context_flag; /**< Context swapping flag */
786 int last_context; /**< Last current context */
789 /** \name VBLANK IRQ support */
795 * If true, vblank interrupt will be disabled immediately when the
796 * refcount drops to zero, as opposed to via the vblank disable
798 * This can be set to true it the hardware has a working vblank
799 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
802 bool vblank_disable_immediate;
804 /* array of size num_crtcs */
805 struct drm_vblank_crtc *vblank;
807 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
810 u32 max_vblank_count; /**< size of vblank counter register */
815 struct list_head vblank_event_list;
816 spinlock_t event_lock;
820 struct drm_agp_head *agp; /**< AGP data */
822 struct pci_dev *pdev; /**< PCI device structure */
824 struct pci_controller *hose;
827 struct platform_device *platformdev; /**< Platform device struture */
828 struct virtio_device *virtdev;
830 struct drm_sg_mem *sg; /**< Scatter gather memory */
831 unsigned int num_crtcs; /**< Number of CRTCs on this device */
835 struct drm_hw_lock *lock;
838 struct drm_local_map *agp_buffer_map;
839 unsigned int agp_buffer_token;
841 struct drm_mode_config mode_config; /**< Current mode config */
843 /** \name GEM information */
845 struct mutex object_name_lock;
846 struct idr object_name_idr;
847 struct drm_vma_offset_manager *vma_offset_manager;
849 int switch_power_state;
852 #include <drm/drm_irq.h>
854 #define DRM_SWITCH_POWER_ON 0
855 #define DRM_SWITCH_POWER_OFF 1
856 #define DRM_SWITCH_POWER_CHANGING 2
857 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
859 static __inline__ int drm_core_check_feature(struct drm_device *dev,
862 return ((dev->driver->driver_features & feature) ? 1 : 0);
865 static inline void drm_device_set_unplugged(struct drm_device *dev)
868 atomic_set(&dev->unplugged, 1);
871 static inline int drm_device_is_unplugged(struct drm_device *dev)
873 int ret = atomic_read(&dev->unplugged);
878 static inline bool drm_is_render_client(const struct drm_file *file_priv)
880 return file_priv->minor->type == DRM_MINOR_RENDER;
883 static inline bool drm_is_control_client(const struct drm_file *file_priv)
885 return file_priv->minor->type == DRM_MINOR_CONTROL;
888 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
890 return file_priv->minor->type == DRM_MINOR_PRIMARY;
893 /******************************************************************/
894 /** \name Internal function definitions */
897 /* Driver support (drm_drv.h) */
898 extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
899 extern long drm_ioctl(struct file *filp,
900 unsigned int cmd, unsigned long arg);
901 extern long drm_compat_ioctl(struct file *filp,
902 unsigned int cmd, unsigned long arg);
903 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
905 /* File Operations (drm_fops.c) */
906 int drm_open(struct inode *inode, struct file *filp);
907 ssize_t drm_read(struct file *filp, char __user *buffer,
908 size_t count, loff_t *offset);
909 int drm_release(struct inode *inode, struct file *filp);
910 unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
911 int drm_event_reserve_init_locked(struct drm_device *dev,
912 struct drm_file *file_priv,
913 struct drm_pending_event *p,
914 struct drm_event *e);
915 int drm_event_reserve_init(struct drm_device *dev,
916 struct drm_file *file_priv,
917 struct drm_pending_event *p,
918 struct drm_event *e);
919 void drm_event_cancel_free(struct drm_device *dev,
920 struct drm_pending_event *p);
921 void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
922 void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
924 /* Misc. IOCTL support (drm_ioctl.c) */
925 int drm_noop(struct drm_device *dev, void *data,
926 struct drm_file *file_priv);
927 int drm_invalid_op(struct drm_device *dev, void *data,
928 struct drm_file *file_priv);
930 /* Cache management (drm_cache.c) */
931 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
932 void drm_clflush_sg(struct sg_table *st);
933 void drm_clflush_virt_range(void *addr, unsigned long length);
936 * These are exported to drivers so that they can implement fencing using
937 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
940 /* Modesetting support */
941 extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
942 extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
945 void drm_put_dev(struct drm_device *dev);
946 void drm_unplug_dev(struct drm_device *dev);
947 extern unsigned int drm_debug;
949 /* Debugfs support */
950 #if defined(CONFIG_DEBUG_FS)
951 extern int drm_debugfs_create_files(const struct drm_info_list *files,
952 int count, struct dentry *root,
953 struct drm_minor *minor);
954 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
955 int count, struct drm_minor *minor);
957 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
958 int count, struct dentry *root,
959 struct drm_minor *minor)
964 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
965 int count, struct drm_minor *minor)
971 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
972 struct drm_gem_object *obj, int flags);
973 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
974 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
976 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
977 struct dma_buf *dma_buf);
978 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
979 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
980 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
982 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
983 dma_addr_t *addrs, int max_pages);
984 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
985 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
988 extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
990 extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
992 /* sysfs support (drm_sysfs.c) */
993 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
996 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
997 struct device *parent);
998 int drm_dev_init(struct drm_device *dev,
999 struct drm_driver *driver,
1000 struct device *parent);
1001 void drm_dev_ref(struct drm_device *dev);
1002 void drm_dev_unref(struct drm_device *dev);
1003 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1004 void drm_dev_unregister(struct drm_device *dev);
1006 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
1007 void drm_minor_release(struct drm_minor *minor);
1012 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1014 if (dev->driver->device_is_agp != NULL) {
1015 int err = (*dev->driver->device_is_agp) (dev);
1022 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1024 void drm_pci_agp_destroy(struct drm_device *dev);
1026 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1027 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1029 extern int drm_get_pci_dev(struct pci_dev *pdev,
1030 const struct pci_device_id *ent,
1031 struct drm_driver *driver);
1032 extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
1034 static inline int drm_get_pci_dev(struct pci_dev *pdev,
1035 const struct pci_device_id *ent,
1036 struct drm_driver *driver)
1041 static inline int drm_pci_set_busid(struct drm_device *dev,
1042 struct drm_master *master)
1048 #define DRM_PCIE_SPEED_25 1
1049 #define DRM_PCIE_SPEED_50 2
1050 #define DRM_PCIE_SPEED_80 4
1052 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1053 extern int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw);
1055 /* platform section */
1056 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1058 /* returns true if currently okay to sleep */
1059 static __inline__ bool drm_can_sleep(void)
1061 if (in_atomic() || in_dbg_master() || irqs_disabled())
1066 /* helper for handling conditionals in various for_each macros */
1067 #define for_each_if(condition) if (!(condition)) {} else