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_NONE 0x00
131 #define DRM_UT_CORE 0x01
132 #define DRM_UT_DRIVER 0x02
133 #define DRM_UT_KMS 0x04
134 #define DRM_UT_PRIME 0x08
135 #define DRM_UT_ATOMIC 0x10
136 #define DRM_UT_VBL 0x20
138 extern __printf(6, 7)
139 void drm_dev_printk(const struct device *dev, const char *level,
140 unsigned int category, const char *function_name,
141 const char *prefix, const char *format, ...);
143 extern __printf(5, 6)
144 void drm_printk(const char *level, unsigned int category,
145 const char *function_name, const char *prefix,
146 const char *format, ...);
148 /***********************************************************************/
149 /** \name DRM template customization defaults */
152 /* driver capabilities and requirements mask */
153 #define DRIVER_USE_AGP 0x1
154 #define DRIVER_LEGACY 0x2
155 #define DRIVER_PCI_DMA 0x8
156 #define DRIVER_SG 0x10
157 #define DRIVER_HAVE_DMA 0x20
158 #define DRIVER_HAVE_IRQ 0x40
159 #define DRIVER_IRQ_SHARED 0x80
160 #define DRIVER_GEM 0x1000
161 #define DRIVER_MODESET 0x2000
162 #define DRIVER_PRIME 0x4000
163 #define DRIVER_RENDER 0x8000
164 #define DRIVER_ATOMIC 0x10000
165 #define DRIVER_KMS_LEGACY_CONTEXT 0x20000
167 /***********************************************************************/
168 /** \name Macros to make printk easier */
171 #define _DRM_PRINTK(once, level, fmt, ...) \
173 printk##once(KERN_##level "[" DRM_NAME "] " fmt, \
177 #define DRM_INFO(fmt, ...) \
178 _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
179 #define DRM_NOTE(fmt, ...) \
180 _DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
181 #define DRM_WARN(fmt, ...) \
182 _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
184 #define DRM_INFO_ONCE(fmt, ...) \
185 _DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
186 #define DRM_NOTE_ONCE(fmt, ...) \
187 _DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
188 #define DRM_WARN_ONCE(fmt, ...) \
189 _DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
194 * \param fmt printf() like format string.
195 * \param arg arguments
197 #define DRM_DEV_ERROR(dev, fmt, ...) \
198 drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
200 #define DRM_ERROR(fmt, ...) \
201 drm_printk(KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*", fmt, \
205 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
207 * \param fmt printf() like format string.
208 * \param arg arguments
210 #define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...) \
212 static DEFINE_RATELIMIT_STATE(_rs, \
213 DEFAULT_RATELIMIT_INTERVAL, \
214 DEFAULT_RATELIMIT_BURST); \
216 if (__ratelimit(&_rs)) \
217 DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__); \
219 #define DRM_ERROR_RATELIMITED(fmt, ...) \
220 DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
222 #define DRM_DEV_INFO(dev, fmt, ...) \
223 drm_dev_printk(dev, KERN_INFO, DRM_UT_NONE, __func__, "", fmt, \
226 #define DRM_DEV_INFO_ONCE(dev, fmt, ...) \
228 static bool __print_once __read_mostly; \
229 if (!__print_once) { \
230 __print_once = true; \
231 DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__); \
238 * \param fmt printf() like format string.
239 * \param arg arguments
241 #define DRM_DEV_DEBUG(dev, fmt, args...) \
242 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, \
244 #define DRM_DEBUG(fmt, args...) \
245 drm_printk(KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, ##args)
247 #define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...) \
248 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "", \
250 #define DRM_DEBUG_DRIVER(fmt, args...) \
251 drm_printk(KERN_DEBUG, DRM_UT_DRIVER, __func__, "", fmt, ##args)
253 #define DRM_DEV_DEBUG_KMS(dev, fmt, args...) \
254 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt, \
256 #define DRM_DEBUG_KMS(fmt, args...) \
257 drm_printk(KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt, ##args)
259 #define DRM_DEV_DEBUG_PRIME(dev, fmt, args...) \
260 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "", \
262 #define DRM_DEBUG_PRIME(fmt, args...) \
263 drm_printk(KERN_DEBUG, DRM_UT_PRIME, __func__, "", fmt, ##args)
265 #define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...) \
266 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "", \
268 #define DRM_DEBUG_ATOMIC(fmt, args...) \
269 drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, __func__, "", fmt, ##args)
271 #define DRM_DEV_DEBUG_VBL(dev, fmt, args...) \
272 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt, \
274 #define DRM_DEBUG_VBL(fmt, args...) \
275 drm_printk(KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt, ##args)
277 #define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...) \
279 static DEFINE_RATELIMIT_STATE(_rs, \
280 DEFAULT_RATELIMIT_INTERVAL, \
281 DEFAULT_RATELIMIT_BURST); \
282 if (__ratelimit(&_rs)) \
283 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ ## level, \
284 __func__, "", fmt, ##args); \
288 * Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
290 * \param fmt printf() like format string.
291 * \param arg arguments
293 #define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, args...) \
294 DEV__DRM_DEFINE_DEBUG_RATELIMITED(dev, CORE, fmt, ##args)
295 #define DRM_DEBUG_RATELIMITED(fmt, args...) \
296 DRM_DEV_DEBUG_RATELIMITED(NULL, fmt, ##args)
297 #define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, args...) \
298 _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRIVER, fmt, ##args)
299 #define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...) \
300 DRM_DEV_DEBUG_DRIVER_RATELIMITED(NULL, fmt, ##args)
301 #define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, args...) \
302 _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, KMS, fmt, ##args)
303 #define DRM_DEBUG_KMS_RATELIMITED(fmt, args...) \
304 DRM_DEV_DEBUG_KMS_RATELIMITED(NULL, fmt, ##args)
305 #define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, args...) \
306 _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, PRIME, fmt, ##args)
307 #define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...) \
308 DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##args)
312 /***********************************************************************/
313 /** \name Internal types and structures */
316 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
319 * Ioctl function type.
321 * \param inode device inode.
322 * \param file_priv DRM file private pointer.
323 * \param cmd command.
324 * \param arg argument.
326 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
327 struct drm_file *file_priv);
329 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
332 #define DRM_IOCTL_NR(n) _IOC_NR(n)
333 #define DRM_MAJOR 226
336 #define DRM_MASTER 0x2
337 #define DRM_ROOT_ONLY 0x4
338 #define DRM_CONTROL_ALLOW 0x8
339 #define DRM_UNLOCKED 0x10
340 #define DRM_RENDER_ALLOW 0x20
342 struct drm_ioctl_desc {
350 * Creates a driver or general drm_ioctl_desc array entry for the given
351 * ioctl, for use by drm_ioctl().
354 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
355 [DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = { \
356 .cmd = DRM_IOCTL_##ioctl, \
362 /* Event queued up for userspace to read */
363 struct drm_pending_event {
364 struct completion *completion;
365 struct drm_event *event;
367 struct list_head link;
368 struct list_head pending_link;
369 struct drm_file *file_priv;
370 pid_t pid; /* pid of requester, no guarantee it's valid by the time
371 we deliver the event, for tracing only */
374 /* initial implementaton using a linked list - todo hashtab */
375 struct drm_prime_file_private {
376 struct list_head head;
380 /** File private data */
382 unsigned authenticated :1;
383 /* true when the client has asked us to expose stereo 3D mode flags */
384 unsigned stereo_allowed :1;
386 * true if client understands CRTC primary planes and cursor planes
389 unsigned universal_planes:1;
390 /* true if client understands atomic properties */
393 * This client is the creator of @master.
394 * Protected by struct drm_device::master_mutex.
396 unsigned is_master:1;
401 struct list_head lhead;
402 struct drm_minor *minor;
403 unsigned long lock_count;
405 /** Mapping of mm object handles to object pointers. */
406 struct idr object_idr;
407 /** Lock for synchronization of access to object_idr. */
408 spinlock_t table_lock;
413 struct drm_master *master; /* master this node is currently associated with
414 N.B. not always dev->master */
416 * fbs - List of framebuffers associated with this file.
418 * Protected by fbs_lock. Note that the fbs list holds a reference on
419 * the fb object to prevent it from untimely disappearing.
421 struct list_head fbs;
422 struct mutex fbs_lock;
424 /** User-created blob properties; this retains a reference on the
426 struct list_head blobs;
428 wait_queue_head_t event_wait;
429 struct list_head pending_event_list;
430 struct list_head event_list;
433 struct mutex event_read_lock;
435 struct drm_prime_file_private prime;
441 struct drm_lock_data {
442 struct drm_hw_lock *hw_lock; /**< Hardware lock */
443 /** Private of lock holder's file (NULL=kernel) */
444 struct drm_file *file_priv;
445 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
446 unsigned long lock_time; /**< Time of last lock in jiffies */
448 uint32_t kernel_waiters;
449 uint32_t user_waiters;
453 /* Flags and return codes for get_vblank_timestamp() driver function. */
454 #define DRM_CALLED_FROM_VBLIRQ 1
455 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
456 #define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
458 /* get_scanout_position() return flags */
459 #define DRM_SCANOUTPOS_VALID (1 << 0)
460 #define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
461 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
464 * DRM driver structure. This structure represent the common code for
465 * a family of cards. There will one drm_device for each card present
469 int (*load) (struct drm_device *, unsigned long flags);
470 int (*firstopen) (struct drm_device *);
471 int (*open) (struct drm_device *, struct drm_file *);
472 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
473 void (*postclose) (struct drm_device *, struct drm_file *);
474 void (*lastclose) (struct drm_device *);
475 int (*unload) (struct drm_device *);
476 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
477 int (*dma_quiescent) (struct drm_device *);
478 int (*context_dtor) (struct drm_device *dev, int context);
479 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
482 * get_vblank_counter - get raw hardware vblank counter
484 * @pipe: counter to fetch
486 * Driver callback for fetching a raw hardware vblank counter for @crtc.
487 * If a device doesn't have a hardware counter, the driver can simply
488 * use drm_vblank_no_hw_counter() function. The DRM core will account for
489 * missed vblank events while interrupts where disabled based on system
492 * Wraparound handling and loss of events due to modesetting is dealt
493 * with in the DRM core code.
496 * Raw vblank counter value.
498 u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe);
501 * enable_vblank - enable vblank interrupt events
503 * @pipe: which irq to enable
505 * Enable vblank interrupts for @crtc. If the device doesn't have
506 * a hardware vblank counter, the driver should use the
507 * drm_vblank_no_hw_counter() function that keeps a virtual counter.
510 * Zero on success, appropriate errno if the given @crtc's vblank
511 * interrupt cannot be enabled.
513 int (*enable_vblank) (struct drm_device *dev, unsigned int pipe);
516 * disable_vblank - disable vblank interrupt events
518 * @pipe: which irq to enable
520 * Disable vblank interrupts for @crtc. If the device doesn't have
521 * a hardware vblank counter, the driver should use the
522 * drm_vblank_no_hw_counter() function that keeps a virtual counter.
524 void (*disable_vblank) (struct drm_device *dev, unsigned int pipe);
527 * Called by \c drm_device_is_agp. Typically used to determine if a
528 * card is really attached to AGP or not.
530 * \param dev DRM device handle
533 * One of three values is returned depending on whether or not the
534 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
535 * (return of 1), or may or may not be AGP (return of 2).
537 int (*device_is_agp) (struct drm_device *dev);
540 * Called by vblank timestamping code.
542 * Return the current display scanout position from a crtc, and an
543 * optional accurate ktime_get timestamp of when position was measured.
545 * \param dev DRM device.
546 * \param pipe Id of the crtc to query.
547 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
548 * \param *vpos Target location for current vertical scanout position.
549 * \param *hpos Target location for current horizontal scanout position.
550 * \param *stime Target location for timestamp taken immediately before
551 * scanout position query. Can be NULL to skip timestamp.
552 * \param *etime Target location for timestamp taken immediately after
553 * scanout position query. Can be NULL to skip timestamp.
554 * \param mode Current display timings.
556 * Returns vpos as a positive number while in active scanout area.
557 * Returns vpos as a negative number inside vblank, counting the number
558 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
559 * until start of active scanout / end of vblank."
561 * \return Flags, or'ed together as follows:
563 * DRM_SCANOUTPOS_VALID = Query successful.
564 * DRM_SCANOUTPOS_INVBL = Inside vblank.
565 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
566 * this flag means that returned position may be offset by a constant
567 * but unknown small number of scanlines wrt. real scanout position.
570 int (*get_scanout_position) (struct drm_device *dev, unsigned int pipe,
571 unsigned int flags, int *vpos, int *hpos,
572 ktime_t *stime, ktime_t *etime,
573 const struct drm_display_mode *mode);
576 * Called by \c drm_get_last_vbltimestamp. Should return a precise
577 * timestamp when the most recent VBLANK interval ended or will end.
579 * Specifically, the timestamp in @vblank_time should correspond as
580 * closely as possible to the time when the first video scanline of
581 * the video frame after the end of VBLANK will start scanning out,
582 * the time immediately after end of the VBLANK interval. If the
583 * @crtc is currently inside VBLANK, this will be a time in the future.
584 * If the @crtc is currently scanning out a frame, this will be the
585 * past start time of the current scanout. This is meant to adhere
586 * to the OpenML OML_sync_control extension specification.
588 * \param dev dev DRM device handle.
589 * \param pipe crtc for which timestamp should be returned.
590 * \param *max_error Maximum allowable timestamp error in nanoseconds.
591 * Implementation should strive to provide timestamp
592 * with an error of at most *max_error nanoseconds.
593 * Returns true upper bound on error for timestamp.
594 * \param *vblank_time Target location for returned vblank timestamp.
595 * \param flags 0 = Defaults, no special treatment needed.
596 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
597 * irq handler. Some drivers need to apply some workarounds
598 * for gpu-specific vblank irq quirks if flag is set.
601 * Zero if timestamping isn't supported in current display mode or a
602 * negative number on failure. A positive status code on success,
603 * which describes how the vblank_time timestamp was computed.
605 int (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe,
607 struct timeval *vblank_time,
610 /* these have to be filled in */
612 irqreturn_t(*irq_handler) (int irq, void *arg);
613 void (*irq_preinstall) (struct drm_device *dev);
614 int (*irq_postinstall) (struct drm_device *dev);
615 void (*irq_uninstall) (struct drm_device *dev);
617 /* Master routines */
618 int (*master_create)(struct drm_device *dev, struct drm_master *master);
619 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
621 * master_set is called whenever the minor master is set.
622 * master_drop is called whenever the minor master is dropped.
625 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
627 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
629 int (*debugfs_init)(struct drm_minor *minor);
630 void (*debugfs_cleanup)(struct drm_minor *minor);
633 * @gem_free_object: deconstructor for drm_gem_objects
635 * This is deprecated and should not be used by new drivers. Use
636 * @gem_free_object_unlocked instead.
638 void (*gem_free_object) (struct drm_gem_object *obj);
641 * @gem_free_object_unlocked: deconstructor for drm_gem_objects
643 * This is for drivers which are not encumbered with dev->struct_mutex
644 * legacy locking schemes. Use this hook instead of @gem_free_object.
646 void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
648 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
649 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
652 * Hook for allocating the GEM object struct, for use by core
655 struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
659 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
660 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
661 uint32_t handle, uint32_t flags, int *prime_fd);
662 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
663 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
664 int prime_fd, uint32_t *handle);
665 /* export GEM -> dmabuf */
666 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
667 struct drm_gem_object *obj, int flags);
668 /* import dmabuf -> GEM */
669 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
670 struct dma_buf *dma_buf);
671 /* low-level interface used by drm_gem_prime_{import,export} */
672 int (*gem_prime_pin)(struct drm_gem_object *obj);
673 void (*gem_prime_unpin)(struct drm_gem_object *obj);
674 struct reservation_object * (*gem_prime_res_obj)(
675 struct drm_gem_object *obj);
676 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
677 struct drm_gem_object *(*gem_prime_import_sg_table)(
678 struct drm_device *dev,
679 struct dma_buf_attachment *attach,
680 struct sg_table *sgt);
681 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
682 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
683 int (*gem_prime_mmap)(struct drm_gem_object *obj,
684 struct vm_area_struct *vma);
686 /* vga arb irq handler */
687 void (*vgaarb_irq)(struct drm_device *dev, bool state);
689 /* dumb alloc support */
690 int (*dumb_create)(struct drm_file *file_priv,
691 struct drm_device *dev,
692 struct drm_mode_create_dumb *args);
693 int (*dumb_map_offset)(struct drm_file *file_priv,
694 struct drm_device *dev, uint32_t handle,
696 int (*dumb_destroy)(struct drm_file *file_priv,
697 struct drm_device *dev,
700 /* Driver private ops for this object */
701 const struct vm_operations_struct *gem_vm_ops;
712 const struct drm_ioctl_desc *ioctls;
714 const struct file_operations *fops;
716 /* List of devices hanging off this driver with stealth attach. */
717 struct list_head legacy_dev_list;
720 enum drm_minor_type {
728 * Info file list entry. This structure represents a debugfs or proc file to
729 * be created by the drm core
731 struct drm_info_list {
732 const char *name; /** file name */
733 int (*show)(struct seq_file*, void*); /** show callback */
734 u32 driver_features; /**< Required driver features for this entry */
739 * debugfs node structure. This structure represents a debugfs file.
741 struct drm_info_node {
742 struct list_head list;
743 struct drm_minor *minor;
744 const struct drm_info_list *info_ent;
749 * DRM minor structure. This structure represents a drm minor number.
752 int index; /**< Minor device number */
753 int type; /**< Control or render */
754 struct device *kdev; /**< Linux device */
755 struct drm_device *dev;
757 struct dentry *debugfs_root;
759 struct list_head debugfs_list;
760 struct mutex debugfs_lock; /* Protects debugfs_list. */
764 * DRM device structure. This structure represent a complete card that
765 * may contain multiple heads.
768 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
769 int if_version; /**< Highest interface version set */
771 /** \name Lifetime Management */
773 struct kref ref; /**< Object ref-count */
774 struct device *dev; /**< Device structure of bus-device */
775 struct drm_driver *driver; /**< DRM driver managing the device */
776 void *dev_private; /**< DRM driver private data */
777 struct drm_minor *control; /**< Control node */
778 struct drm_minor *primary; /**< Primary node */
779 struct drm_minor *render; /**< Render node */
781 /* currently active master for this device. Protected by master_mutex */
782 struct drm_master *master;
784 atomic_t unplugged; /**< Flag whether dev is dead */
785 struct inode *anon_inode; /**< inode for private address-space */
786 char *unique; /**< unique name of the device */
791 struct mutex struct_mutex; /**< For others */
792 struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
795 /** \name Usage Counters */
797 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
798 spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
799 int buf_use; /**< Buffers in use -- cannot alloc */
800 atomic_t buf_alloc; /**< Buffer allocation in progress */
803 struct mutex filelist_mutex;
804 struct list_head filelist;
806 /** \name Memory management */
808 struct list_head maplist; /**< Linked list of regions */
809 struct drm_open_hash map_hash; /**< User token hash table for maps */
811 /** \name Context handle management */
813 struct list_head ctxlist; /**< Linked list of context handles */
814 struct mutex ctxlist_mutex; /**< For ctxlist */
818 struct list_head vmalist; /**< List of vmas (for debugging) */
822 /** \name DMA support */
824 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
827 /** \name Context support */
830 __volatile__ long context_flag; /**< Context swapping flag */
831 int last_context; /**< Last current context */
834 /** \name VBLANK IRQ support */
840 * If true, vblank interrupt will be disabled immediately when the
841 * refcount drops to zero, as opposed to via the vblank disable
843 * This can be set to true it the hardware has a working vblank
844 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
847 bool vblank_disable_immediate;
849 /* array of size num_crtcs */
850 struct drm_vblank_crtc *vblank;
852 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
855 u32 max_vblank_count; /**< size of vblank counter register */
860 struct list_head vblank_event_list;
861 spinlock_t event_lock;
865 struct drm_agp_head *agp; /**< AGP data */
867 struct pci_dev *pdev; /**< PCI device structure */
869 struct pci_controller *hose;
872 struct platform_device *platformdev; /**< Platform device struture */
873 struct virtio_device *virtdev;
875 struct drm_sg_mem *sg; /**< Scatter gather memory */
876 unsigned int num_crtcs; /**< Number of CRTCs on this device */
880 struct drm_hw_lock *lock;
883 struct drm_local_map *agp_buffer_map;
884 unsigned int agp_buffer_token;
886 struct drm_mode_config mode_config; /**< Current mode config */
888 /** \name GEM information */
890 struct mutex object_name_lock;
891 struct idr object_name_idr;
892 struct drm_vma_offset_manager *vma_offset_manager;
894 int switch_power_state;
897 #include <drm/drm_irq.h>
899 #define DRM_SWITCH_POWER_ON 0
900 #define DRM_SWITCH_POWER_OFF 1
901 #define DRM_SWITCH_POWER_CHANGING 2
902 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
904 static __inline__ int drm_core_check_feature(struct drm_device *dev,
907 return ((dev->driver->driver_features & feature) ? 1 : 0);
910 static inline void drm_device_set_unplugged(struct drm_device *dev)
913 atomic_set(&dev->unplugged, 1);
916 static inline int drm_device_is_unplugged(struct drm_device *dev)
918 int ret = atomic_read(&dev->unplugged);
923 static inline bool drm_is_render_client(const struct drm_file *file_priv)
925 return file_priv->minor->type == DRM_MINOR_RENDER;
928 static inline bool drm_is_control_client(const struct drm_file *file_priv)
930 return file_priv->minor->type == DRM_MINOR_CONTROL;
933 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
935 return file_priv->minor->type == DRM_MINOR_PRIMARY;
938 /******************************************************************/
939 /** \name Internal function definitions */
942 /* Driver support (drm_drv.h) */
943 extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
944 extern long drm_ioctl(struct file *filp,
945 unsigned int cmd, unsigned long arg);
946 extern long drm_compat_ioctl(struct file *filp,
947 unsigned int cmd, unsigned long arg);
948 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
950 /* File Operations (drm_fops.c) */
951 int drm_open(struct inode *inode, struct file *filp);
952 ssize_t drm_read(struct file *filp, char __user *buffer,
953 size_t count, loff_t *offset);
954 int drm_release(struct inode *inode, struct file *filp);
955 unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
956 int drm_event_reserve_init_locked(struct drm_device *dev,
957 struct drm_file *file_priv,
958 struct drm_pending_event *p,
959 struct drm_event *e);
960 int drm_event_reserve_init(struct drm_device *dev,
961 struct drm_file *file_priv,
962 struct drm_pending_event *p,
963 struct drm_event *e);
964 void drm_event_cancel_free(struct drm_device *dev,
965 struct drm_pending_event *p);
966 void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
967 void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
969 /* Misc. IOCTL support (drm_ioctl.c) */
970 int drm_noop(struct drm_device *dev, void *data,
971 struct drm_file *file_priv);
972 int drm_invalid_op(struct drm_device *dev, void *data,
973 struct drm_file *file_priv);
975 /* Cache management (drm_cache.c) */
976 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
977 void drm_clflush_sg(struct sg_table *st);
978 void drm_clflush_virt_range(void *addr, unsigned long length);
981 * These are exported to drivers so that they can implement fencing using
982 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
985 /* Modesetting support */
986 extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
987 extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
990 void drm_put_dev(struct drm_device *dev);
991 void drm_unplug_dev(struct drm_device *dev);
992 extern unsigned int drm_debug;
994 /* Debugfs support */
995 #if defined(CONFIG_DEBUG_FS)
996 extern int drm_debugfs_create_files(const struct drm_info_list *files,
997 int count, struct dentry *root,
998 struct drm_minor *minor);
999 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1000 int count, struct drm_minor *minor);
1002 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1003 int count, struct dentry *root,
1004 struct drm_minor *minor)
1009 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1010 int count, struct drm_minor *minor)
1016 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1017 struct drm_gem_object *obj, int flags);
1018 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1019 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1021 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1022 struct dma_buf *dma_buf);
1023 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1024 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1025 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1027 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1028 dma_addr_t *addrs, int max_pages);
1029 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
1030 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1033 extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
1035 extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
1037 /* sysfs support (drm_sysfs.c) */
1038 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1041 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1042 struct device *parent);
1043 int drm_dev_init(struct drm_device *dev,
1044 struct drm_driver *driver,
1045 struct device *parent);
1046 void drm_dev_ref(struct drm_device *dev);
1047 void drm_dev_unref(struct drm_device *dev);
1048 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1049 void drm_dev_unregister(struct drm_device *dev);
1051 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
1052 void drm_minor_release(struct drm_minor *minor);
1057 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1059 if (dev->driver->device_is_agp != NULL) {
1060 int err = (*dev->driver->device_is_agp) (dev);
1067 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1069 void drm_pci_agp_destroy(struct drm_device *dev);
1071 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1072 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1074 extern int drm_get_pci_dev(struct pci_dev *pdev,
1075 const struct pci_device_id *ent,
1076 struct drm_driver *driver);
1077 extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
1079 static inline int drm_get_pci_dev(struct pci_dev *pdev,
1080 const struct pci_device_id *ent,
1081 struct drm_driver *driver)
1086 static inline int drm_pci_set_busid(struct drm_device *dev,
1087 struct drm_master *master)
1093 #define DRM_PCIE_SPEED_25 1
1094 #define DRM_PCIE_SPEED_50 2
1095 #define DRM_PCIE_SPEED_80 4
1097 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1098 extern int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw);
1100 /* platform section */
1101 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1103 /* returns true if currently okay to sleep */
1104 static __inline__ bool drm_can_sleep(void)
1106 if (in_atomic() || in_dbg_master() || irqs_disabled())
1111 /* helper for handling conditionals in various for_each macros */
1112 #define for_each_if(condition) if (!(condition)) {} else