3 * Private header for Direct Rendering Manager
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * Copyright (c) 2009-2010, Code Aurora Forum.
13 * All rights reserved.
15 * Permission is hereby granted, free of charge, to any person obtaining a
16 * copy of this software and associated documentation files (the "Software"),
17 * to deal in the Software without restriction, including without limitation
18 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
19 * and/or sell copies of the Software, and to permit persons to whom the
20 * Software is furnished to do so, subject to the following conditions:
22 * The above copyright notice and this permission notice (including the next
23 * paragraph) shall be included in all copies or substantial portions of the
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
29 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
30 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
31 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
32 * OTHER DEALINGS IN THE SOFTWARE.
40 /* add include of current.h so that "current" is defined
41 * before static inline funcs in wait.h. Doing this so we
42 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
43 #include <asm/current.h>
44 #endif /* __alpha__ */
45 #include <linux/kernel.h>
46 #include <linux/kref.h>
47 #include <linux/miscdevice.h>
49 #include <linux/init.h>
50 #include <linux/file.h>
51 #include <linux/platform_device.h>
52 #include <linux/pci.h>
53 #include <linux/jiffies.h>
54 #include <linux/dma-mapping.h>
56 #include <linux/cdev.h>
57 #include <linux/mutex.h>
59 #include <linux/slab.h>
60 #include <linux/ratelimit.h>
61 #if defined(__alpha__) || defined(__powerpc__)
62 #include <asm/pgtable.h> /* For pte_wrprotect */
65 #include <asm/uaccess.h>
66 #include <linux/types.h>
67 #include <linux/agp_backend.h>
68 #include <linux/workqueue.h>
69 #include <linux/poll.h>
70 #include <asm/pgalloc.h>
72 #include <drm/drm_sarea.h>
73 #include <drm/drm_vma_manager.h>
75 #include <linux/idr.h>
77 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
87 #include <drm/drm_os_linux.h>
88 #include <drm/drm_hashtab.h>
89 #include <drm/drm_mm.h>
92 * 4 debug categories are defined:
94 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
95 * This is the category used by the DRM_DEBUG() macro.
97 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
98 * This is the category used by the DRM_DEBUG_DRIVER() macro.
100 * KMS: used in the modesetting code.
101 * This is the category used by the DRM_DEBUG_KMS() macro.
103 * PRIME: used in the prime code.
104 * This is the category used by the DRM_DEBUG_PRIME() macro.
106 * Enabling verbose debug messages is done through the drm.debug parameter,
107 * each category being enabled by a bit.
109 * drm.debug=0x1 will enable CORE messages
110 * drm.debug=0x2 will enable DRIVER messages
111 * drm.debug=0x3 will enable CORE and DRIVER messages
113 * drm.debug=0xf will enable all messages
115 * An interesting feature is that it's possible to enable verbose logging at
116 * run-time by echoing the debug value in its sysfs node:
117 * # echo 0xf > /sys/module/drm/parameters/debug
119 #define DRM_UT_CORE 0x01
120 #define DRM_UT_DRIVER 0x02
121 #define DRM_UT_KMS 0x04
122 #define DRM_UT_PRIME 0x08
124 extern __printf(2, 3)
125 void drm_ut_debug_printk(const char *function_name,
126 const char *format, ...);
127 extern __printf(2, 3)
128 int drm_err(const char *func, const char *format, ...);
130 /***********************************************************************/
131 /** \name DRM template customization defaults */
134 /* driver capabilities and requirements mask */
135 #define DRIVER_USE_AGP 0x1
136 #define DRIVER_PCI_DMA 0x8
137 #define DRIVER_SG 0x10
138 #define DRIVER_HAVE_DMA 0x20
139 #define DRIVER_HAVE_IRQ 0x40
140 #define DRIVER_IRQ_SHARED 0x80
141 #define DRIVER_GEM 0x1000
142 #define DRIVER_MODESET 0x2000
143 #define DRIVER_PRIME 0x4000
144 #define DRIVER_RENDER 0x8000
146 /***********************************************************************/
147 /** \name Begin the DRM... */
150 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
151 also include looping detection. */
153 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
154 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
155 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
157 #define DRM_MAP_HASH_OFFSET 0x10000000
161 /***********************************************************************/
162 /** \name Macros to make printk easier */
168 * \param fmt printf() like format string.
169 * \param arg arguments
171 #define DRM_ERROR(fmt, ...) \
172 drm_err(__func__, fmt, ##__VA_ARGS__)
175 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
177 * \param fmt printf() like format string.
178 * \param arg arguments
180 #define DRM_ERROR_RATELIMITED(fmt, ...) \
182 static DEFINE_RATELIMIT_STATE(_rs, \
183 DEFAULT_RATELIMIT_INTERVAL, \
184 DEFAULT_RATELIMIT_BURST); \
186 if (__ratelimit(&_rs)) \
187 drm_err(__func__, fmt, ##__VA_ARGS__); \
190 #define DRM_INFO(fmt, ...) \
191 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
193 #define DRM_INFO_ONCE(fmt, ...) \
194 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
199 * \param fmt printf() like format string.
200 * \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); \
225 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
226 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
227 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
228 #define DRM_DEBUG(fmt, arg...) do { } while (0)
233 /***********************************************************************/
234 /** \name Internal types and structures */
237 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
239 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
242 * Test that the hardware lock is held by the caller, returning otherwise.
244 * \param dev DRM device.
245 * \param filp file pointer of the caller.
247 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
249 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
250 _file_priv->master->lock.file_priv != _file_priv) { \
251 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
252 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
253 _file_priv->master->lock.file_priv, _file_priv); \
259 * Ioctl function type.
261 * \param inode device inode.
262 * \param file_priv DRM file private pointer.
263 * \param cmd command.
264 * \param arg argument.
266 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
267 struct drm_file *file_priv);
269 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
272 #define DRM_IOCTL_NR(n) _IOC_NR(n)
273 #define DRM_MAJOR 226
276 #define DRM_MASTER 0x2
277 #define DRM_ROOT_ONLY 0x4
278 #define DRM_CONTROL_ALLOW 0x8
279 #define DRM_UNLOCKED 0x10
280 #define DRM_RENDER_ALLOW 0x20
282 struct drm_ioctl_desc {
286 unsigned int cmd_drv;
291 * Creates a driver or general drm_ioctl_desc array entry for the given
292 * ioctl, for use by drm_ioctl().
295 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
296 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
298 struct drm_magic_entry {
299 struct list_head head;
300 struct drm_hash_item hash_item;
301 struct drm_file *priv;
304 struct drm_vma_entry {
305 struct list_head head;
306 struct vm_area_struct *vma;
314 int idx; /**< Index into master buflist */
315 int total; /**< Buffer size */
316 int order; /**< log-base-2(total) */
317 int used; /**< Amount of buffer in use (for DMA) */
318 unsigned long offset; /**< Byte offset (used internally) */
319 void *address; /**< Address of buffer */
320 unsigned long bus_address; /**< Bus address of buffer */
321 struct drm_buf *next; /**< Kernel-only: used for free list */
322 __volatile__ int waiting; /**< On kernel DMA queue */
323 __volatile__ int pending; /**< On hardware DMA queue */
324 struct drm_file *file_priv; /**< Private of holding file descr */
325 int context; /**< Kernel queue for this buffer */
326 int while_locked; /**< Dispatch this buffer while locked */
334 } list; /**< Which list we're on */
336 int dev_priv_size; /**< Size of buffer private storage */
337 void *dev_private; /**< Per-buffer private storage */
340 /** bufs is one longer than it has to be */
341 struct drm_waitlist {
342 int count; /**< Number of possible buffers */
343 struct drm_buf **bufs; /**< List of pointers to buffers */
344 struct drm_buf **rp; /**< Read pointer */
345 struct drm_buf **wp; /**< Write pointer */
346 struct drm_buf **end; /**< End pointer */
347 spinlock_t read_lock;
348 spinlock_t write_lock;
351 struct drm_freelist {
352 int initialized; /**< Freelist in use */
353 atomic_t count; /**< Number of free buffers */
354 struct drm_buf *next; /**< End pointer */
356 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
357 int low_mark; /**< Low water mark */
358 int high_mark; /**< High water mark */
359 atomic_t wfh; /**< If waiting for high mark */
363 typedef struct drm_dma_handle {
370 * Buffer entry. There is one of this for each buffer size order.
372 struct drm_buf_entry {
373 int buf_size; /**< size */
374 int buf_count; /**< number of buffers */
375 struct drm_buf *buflist; /**< buffer list */
378 struct drm_dma_handle **seglist;
380 struct drm_freelist freelist;
383 /* Event queued up for userspace to read */
384 struct drm_pending_event {
385 struct drm_event *event;
386 struct list_head link;
387 struct drm_file *file_priv;
388 pid_t pid; /* pid of requester, no guarantee it's valid by the time
389 we deliver the event, for tracing only */
390 void (*destroy)(struct drm_pending_event *event);
393 /* initial implementaton using a linked list - todo hashtab */
394 struct drm_prime_file_private {
395 struct list_head head;
399 /** File private data */
401 unsigned always_authenticated :1;
402 unsigned authenticated :1;
403 /* Whether we're master for a minor. Protected by master_mutex */
404 unsigned is_master :1;
405 /* true when the client has asked us to expose stereo 3D mode flags */
406 unsigned stereo_allowed :1;
408 * true if client understands CRTC primary planes and cursor planes
411 unsigned universal_planes:1;
416 struct list_head lhead;
417 struct drm_minor *minor;
418 unsigned long lock_count;
420 /** Mapping of mm object handles to object pointers. */
421 struct idr object_idr;
422 /** Lock for synchronization of access to object_idr. */
423 spinlock_t table_lock;
428 struct drm_master *master; /* master this node is currently associated with
429 N.B. not always minor->master */
431 * fbs - List of framebuffers associated with this file.
433 * Protected by fbs_lock. Note that the fbs list holds a reference on
434 * the fb object to prevent it from untimely disappearing.
436 struct list_head fbs;
437 struct mutex fbs_lock;
439 wait_queue_head_t event_wait;
440 struct list_head event_list;
443 struct drm_prime_file_private prime;
448 atomic_t use_count; /**< Outstanding uses (+1) */
449 atomic_t finalization; /**< Finalization in progress */
450 atomic_t block_count; /**< Count of processes waiting */
451 atomic_t block_read; /**< Queue blocked for reads */
452 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
453 atomic_t block_write; /**< Queue blocked for writes */
454 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
455 atomic_t total_queued; /**< Total queued statistic */
456 atomic_t total_flushed; /**< Total flushes statistic */
457 atomic_t total_locks; /**< Total locks statistics */
458 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
459 struct drm_waitlist waitlist; /**< Pending buffers */
460 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
466 struct drm_lock_data {
467 struct drm_hw_lock *hw_lock; /**< Hardware lock */
468 /** Private of lock holder's file (NULL=kernel) */
469 struct drm_file *file_priv;
470 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
471 unsigned long lock_time; /**< Time of last lock in jiffies */
473 uint32_t kernel_waiters;
474 uint32_t user_waiters;
481 struct drm_device_dma {
483 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
484 int buf_count; /**< total number of buffers */
485 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
487 int page_count; /**< number of pages */
488 unsigned long *pagelist; /**< page list */
489 unsigned long byte_count;
491 _DRM_DMA_USE_AGP = 0x01,
492 _DRM_DMA_USE_SG = 0x02,
493 _DRM_DMA_USE_FB = 0x04,
494 _DRM_DMA_USE_PCI_RO = 0x08
500 * AGP memory entry. Stored as a doubly linked list.
503 unsigned long handle; /**< handle */
504 struct agp_memory *memory;
505 unsigned long bound; /**< address */
507 struct list_head head;
513 * \sa drm_agp_init() and drm_device::agp.
515 struct drm_agp_head {
516 struct agp_kern_info agp_info; /**< AGP device information */
517 struct list_head memory;
518 unsigned long mode; /**< AGP mode */
519 struct agp_bridge_data *bridge;
520 int enabled; /**< whether the AGP bus as been enabled */
521 int acquired; /**< whether the AGP device has been acquired */
524 int cant_use_aperture;
525 unsigned long page_mask;
529 * Scatter-gather memory.
532 unsigned long handle;
535 struct page **pagelist;
541 struct drm_hw_lock *lock;
546 * Kernel side of a mapping
548 struct drm_local_map {
549 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
550 unsigned long size; /**< Requested physical size (bytes) */
551 enum drm_map_type type; /**< Type of memory to map */
552 enum drm_map_flags flags; /**< Flags */
553 void *handle; /**< User-space: "Handle" to pass to mmap() */
554 /**< Kernel-space: kernel-virtual address */
555 int mtrr; /**< MTRR slot used */
558 typedef struct drm_local_map drm_local_map_t;
563 struct drm_map_list {
564 struct list_head head; /**< list head */
565 struct drm_hash_item hash;
566 struct drm_local_map *map; /**< mapping */
568 struct drm_master *master;
572 * Context handle list
574 struct drm_ctx_list {
575 struct list_head head; /**< list head */
576 drm_context_t handle; /**< context handle */
577 struct drm_file *tag; /**< associated fd private data */
580 /* location of GART table */
581 #define DRM_ATI_GART_MAIN 1
582 #define DRM_ATI_GART_FB 2
584 #define DRM_ATI_GART_PCI 1
585 #define DRM_ATI_GART_PCIE 2
586 #define DRM_ATI_GART_IGP 3
588 struct drm_ati_pcigart_info {
589 int gart_table_location;
593 dma_addr_t table_mask;
594 struct drm_dma_handle *table_handle;
595 struct drm_local_map mapping;
600 * This structure defines the drm_mm memory object, which will be used by the
601 * DRM for its buffer objects.
603 struct drm_gem_object {
604 /** Reference count of this object */
605 struct kref refcount;
608 * handle_count - gem file_priv handle count of this object
610 * Each handle also holds a reference. Note that when the handle_count
611 * drops to 0 any global names (e.g. the id in the flink namespace) will
614 * Protected by dev->object_name_lock.
616 unsigned handle_count;
618 /** Related drm device */
619 struct drm_device *dev;
621 /** File representing the shmem storage */
624 /* Mapping info for this object */
625 struct drm_vma_offset_node vma_node;
628 * Size of the object, in bytes. Immutable over the object's
634 * Global name for this object, starts at 1. 0 means unnamed.
635 * Access is covered by the object_name_lock in the related drm_device
640 * Memory domains. These monitor which caches contain read/write data
641 * related to the object. When transitioning from one set of domains
642 * to another, the driver is called to ensure that caches are suitably
643 * flushed and invalidated
645 uint32_t read_domains;
646 uint32_t write_domain;
649 * While validating an exec operation, the
650 * new read/write domain values are computed here.
651 * They will be transferred to the above values
652 * at the point that any cache flushing occurs
654 uint32_t pending_read_domains;
655 uint32_t pending_write_domain;
658 * dma_buf - dma buf associated with this GEM object
660 * Pointer to the dma-buf associated with this gem object (either
661 * through importing or exporting). We break the resulting reference
662 * loop when the last gem handle for this object is released.
664 * Protected by obj->object_name_lock
666 struct dma_buf *dma_buf;
669 * import_attach - dma buf attachment backing this object
671 * Any foreign dma_buf imported as a gem object has this set to the
672 * attachment point for the device. This is invariant over the lifetime
675 * The driver's ->gem_free_object callback is responsible for cleaning
676 * up the dma_buf attachment and references acquired at import time.
678 * Note that the drm gem/prime core does not depend upon drivers setting
679 * this field any more. So for drivers where this doesn't make sense
680 * (e.g. virtual devices or a displaylink behind an usb bus) they can
681 * simply leave it as NULL.
683 struct dma_buf_attachment *import_attach;
686 #include <drm/drm_crtc.h>
689 * struct drm_master - drm master structure
691 * @refcount: Refcount for this master object.
692 * @minor: Link back to minor char device we are master for. Immutable.
693 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
694 * @unique_len: Length of unique field. Protected by drm_global_mutex.
695 * @unique_size: Amount allocated. Protected by drm_global_mutex.
696 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
697 * @magicfree: List of used authentication tokens. Protected by struct_mutex.
698 * @lock: DRI lock information.
699 * @driver_priv: Pointer to driver-private information.
702 struct kref refcount;
703 struct drm_minor *minor;
707 struct drm_open_hash magiclist;
708 struct list_head magicfree;
709 struct drm_lock_data lock;
713 /* Size of ringbuffer for vblank timestamps. Just double-buffer
714 * in initial implementation.
716 #define DRM_VBLANKTIME_RBSIZE 2
718 /* Flags and return codes for get_vblank_timestamp() driver function. */
719 #define DRM_CALLED_FROM_VBLIRQ 1
720 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
721 #define DRM_VBLANKTIME_INVBL (1 << 1)
723 /* get_scanout_position() return flags */
724 #define DRM_SCANOUTPOS_VALID (1 << 0)
725 #define DRM_SCANOUTPOS_INVBL (1 << 1)
726 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
729 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
733 * DRM driver structure. This structure represent the common code for
734 * a family of cards. There will one drm_device for each card present
738 int (*load) (struct drm_device *, unsigned long flags);
739 int (*firstopen) (struct drm_device *);
740 int (*open) (struct drm_device *, struct drm_file *);
741 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
742 void (*postclose) (struct drm_device *, struct drm_file *);
743 void (*lastclose) (struct drm_device *);
744 int (*unload) (struct drm_device *);
745 int (*suspend) (struct drm_device *, pm_message_t state);
746 int (*resume) (struct drm_device *);
747 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
748 int (*dma_quiescent) (struct drm_device *);
749 int (*context_dtor) (struct drm_device *dev, int context);
752 * get_vblank_counter - get raw hardware vblank counter
754 * @crtc: counter to fetch
756 * Driver callback for fetching a raw hardware vblank counter for @crtc.
757 * If a device doesn't have a hardware counter, the driver can simply
758 * return the value of drm_vblank_count. The DRM core will account for
759 * missed vblank events while interrupts where disabled based on system
762 * Wraparound handling and loss of events due to modesetting is dealt
763 * with in the DRM core code.
766 * Raw vblank counter value.
768 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
771 * enable_vblank - enable vblank interrupt events
773 * @crtc: which irq to enable
775 * Enable vblank interrupts for @crtc. If the device doesn't have
776 * a hardware vblank counter, this routine should be a no-op, since
777 * interrupts will have to stay on to keep the count accurate.
780 * Zero on success, appropriate errno if the given @crtc's vblank
781 * interrupt cannot be enabled.
783 int (*enable_vblank) (struct drm_device *dev, int crtc);
786 * disable_vblank - disable vblank interrupt events
788 * @crtc: which irq to enable
790 * Disable vblank interrupts for @crtc. If the device doesn't have
791 * a hardware vblank counter, this routine should be a no-op, since
792 * interrupts will have to stay on to keep the count accurate.
794 void (*disable_vblank) (struct drm_device *dev, int crtc);
797 * Called by \c drm_device_is_agp. Typically used to determine if a
798 * card is really attached to AGP or not.
800 * \param dev DRM device handle
803 * One of three values is returned depending on whether or not the
804 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
805 * (return of 1), or may or may not be AGP (return of 2).
807 int (*device_is_agp) (struct drm_device *dev);
810 * Called by vblank timestamping code.
812 * Return the current display scanout position from a crtc, and an
813 * optional accurate ktime_get timestamp of when position was measured.
815 * \param dev DRM device.
816 * \param crtc Id of the crtc to query.
817 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
818 * \param *vpos Target location for current vertical scanout position.
819 * \param *hpos Target location for current horizontal scanout position.
820 * \param *stime Target location for timestamp taken immediately before
821 * scanout position query. Can be NULL to skip timestamp.
822 * \param *etime Target location for timestamp taken immediately after
823 * scanout position query. Can be NULL to skip timestamp.
825 * Returns vpos as a positive number while in active scanout area.
826 * Returns vpos as a negative number inside vblank, counting the number
827 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
828 * until start of active scanout / end of vblank."
830 * \return Flags, or'ed together as follows:
832 * DRM_SCANOUTPOS_VALID = Query successful.
833 * DRM_SCANOUTPOS_INVBL = Inside vblank.
834 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
835 * this flag means that returned position may be offset by a constant
836 * but unknown small number of scanlines wrt. real scanout position.
839 int (*get_scanout_position) (struct drm_device *dev, int crtc,
841 int *vpos, int *hpos, ktime_t *stime,
845 * Called by \c drm_get_last_vbltimestamp. Should return a precise
846 * timestamp when the most recent VBLANK interval ended or will end.
848 * Specifically, the timestamp in @vblank_time should correspond as
849 * closely as possible to the time when the first video scanline of
850 * the video frame after the end of VBLANK will start scanning out,
851 * the time immediately after end of the VBLANK interval. If the
852 * @crtc is currently inside VBLANK, this will be a time in the future.
853 * If the @crtc is currently scanning out a frame, this will be the
854 * past start time of the current scanout. This is meant to adhere
855 * to the OpenML OML_sync_control extension specification.
857 * \param dev dev DRM device handle.
858 * \param crtc crtc for which timestamp should be returned.
859 * \param *max_error Maximum allowable timestamp error in nanoseconds.
860 * Implementation should strive to provide timestamp
861 * with an error of at most *max_error nanoseconds.
862 * Returns true upper bound on error for timestamp.
863 * \param *vblank_time Target location for returned vblank timestamp.
864 * \param flags 0 = Defaults, no special treatment needed.
865 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
866 * irq handler. Some drivers need to apply some workarounds
867 * for gpu-specific vblank irq quirks if flag is set.
870 * Zero if timestamping isn't supported in current display mode or a
871 * negative number on failure. A positive status code on success,
872 * which describes how the vblank_time timestamp was computed.
874 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
876 struct timeval *vblank_time,
879 /* these have to be filled in */
881 irqreturn_t(*irq_handler) (int irq, void *arg);
882 void (*irq_preinstall) (struct drm_device *dev);
883 int (*irq_postinstall) (struct drm_device *dev);
884 void (*irq_uninstall) (struct drm_device *dev);
886 /* Master routines */
887 int (*master_create)(struct drm_device *dev, struct drm_master *master);
888 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
890 * master_set is called whenever the minor master is set.
891 * master_drop is called whenever the minor master is dropped.
894 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
896 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
899 int (*debugfs_init)(struct drm_minor *minor);
900 void (*debugfs_cleanup)(struct drm_minor *minor);
903 * Driver-specific constructor for drm_gem_objects, to set up
904 * obj->driver_private.
906 * Returns 0 on success.
908 void (*gem_free_object) (struct drm_gem_object *obj);
909 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
910 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
913 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
914 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
915 uint32_t handle, uint32_t flags, int *prime_fd);
916 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
917 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
918 int prime_fd, uint32_t *handle);
919 /* export GEM -> dmabuf */
920 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
921 struct drm_gem_object *obj, int flags);
922 /* import dmabuf -> GEM */
923 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
924 struct dma_buf *dma_buf);
925 /* low-level interface used by drm_gem_prime_{import,export} */
926 int (*gem_prime_pin)(struct drm_gem_object *obj);
927 void (*gem_prime_unpin)(struct drm_gem_object *obj);
928 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
929 struct drm_gem_object *(*gem_prime_import_sg_table)(
930 struct drm_device *dev, size_t size,
931 struct sg_table *sgt);
932 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
933 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
934 int (*gem_prime_mmap)(struct drm_gem_object *obj,
935 struct vm_area_struct *vma);
937 /* vga arb irq handler */
938 void (*vgaarb_irq)(struct drm_device *dev, bool state);
940 /* dumb alloc support */
941 int (*dumb_create)(struct drm_file *file_priv,
942 struct drm_device *dev,
943 struct drm_mode_create_dumb *args);
944 int (*dumb_map_offset)(struct drm_file *file_priv,
945 struct drm_device *dev, uint32_t handle,
947 int (*dumb_destroy)(struct drm_file *file_priv,
948 struct drm_device *dev,
951 /* Driver private ops for this object */
952 const struct vm_operations_struct *gem_vm_ops;
963 const struct drm_ioctl_desc *ioctls;
965 const struct file_operations *fops;
968 /* List of devices hanging off this driver with stealth attach. */
969 struct list_head legacy_dev_list;
972 enum drm_minor_type {
980 * Info file list entry. This structure represents a debugfs or proc file to
981 * be created by the drm core
983 struct drm_info_list {
984 const char *name; /** file name */
985 int (*show)(struct seq_file*, void*); /** show callback */
986 u32 driver_features; /**< Required driver features for this entry */
991 * debugfs node structure. This structure represents a debugfs file.
993 struct drm_info_node {
994 struct list_head list;
995 struct drm_minor *minor;
996 const struct drm_info_list *info_ent;
1001 * DRM minor structure. This structure represents a drm minor number.
1004 int index; /**< Minor device number */
1005 int type; /**< Control or render */
1006 struct device *kdev; /**< Linux device */
1007 struct drm_device *dev;
1009 struct dentry *debugfs_root;
1011 struct list_head debugfs_list;
1012 struct mutex debugfs_lock; /* Protects debugfs_list. */
1014 /* currently active master for this node. Protected by master_mutex */
1015 struct drm_master *master;
1016 struct drm_mode_group mode_group;
1020 struct drm_pending_vblank_event {
1021 struct drm_pending_event base;
1023 struct drm_event_vblank event;
1026 struct drm_vblank_crtc {
1027 struct drm_device *dev; /* pointer to the drm_device */
1028 wait_queue_head_t queue; /**< VBLANK wait queue */
1029 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1030 struct timer_list disable_timer; /* delayed disable timer */
1031 atomic_t count; /**< number of VBLANK interrupts */
1032 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1033 u32 last; /* protected by dev->vbl_lock, used */
1034 /* for wraparound handling */
1035 u32 last_wait; /* Last vblank seqno waited per CRTC */
1036 unsigned int inmodeset; /* Display driver is setting mode */
1037 int crtc; /* crtc index */
1038 bool enabled; /* so we don't call enable more than
1043 * DRM device structure. This structure represent a complete card that
1044 * may contain multiple heads.
1047 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1048 int if_version; /**< Highest interface version set */
1050 /** \name Lifetime Management */
1052 struct kref ref; /**< Object ref-count */
1053 struct device *dev; /**< Device structure of bus-device */
1054 struct drm_driver *driver; /**< DRM driver managing the device */
1055 void *dev_private; /**< DRM driver private data */
1056 struct drm_minor *control; /**< Control node */
1057 struct drm_minor *primary; /**< Primary node */
1058 struct drm_minor *render; /**< Render node */
1059 atomic_t unplugged; /**< Flag whether dev is dead */
1060 struct inode *anon_inode; /**< inode for private address-space */
1065 struct mutex struct_mutex; /**< For others */
1066 struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
1069 /** \name Usage Counters */
1071 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
1072 spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
1073 int buf_use; /**< Buffers in use -- cannot alloc */
1074 atomic_t buf_alloc; /**< Buffer allocation in progress */
1077 struct list_head filelist;
1079 /** \name Memory management */
1081 struct list_head maplist; /**< Linked list of regions */
1082 struct drm_open_hash map_hash; /**< User token hash table for maps */
1084 /** \name Context handle management */
1086 struct list_head ctxlist; /**< Linked list of context handles */
1087 struct mutex ctxlist_mutex; /**< For ctxlist */
1091 struct list_head vmalist; /**< List of vmas (for debugging) */
1095 /** \name DMA support */
1097 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1100 /** \name Context support */
1102 bool irq_enabled; /**< True if irq handler is enabled */
1105 __volatile__ long context_flag; /**< Context swapping flag */
1106 int last_context; /**< Last current context */
1109 /** \name VBLANK IRQ support */
1113 * At load time, disabling the vblank interrupt won't be allowed since
1114 * old clients may not call the modeset ioctl and therefore misbehave.
1115 * Once the modeset ioctl *has* been called though, we can safely
1116 * disable them when unused.
1118 bool vblank_disable_allowed;
1120 /* array of size num_crtcs */
1121 struct drm_vblank_crtc *vblank;
1123 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1124 spinlock_t vbl_lock;
1126 u32 max_vblank_count; /**< size of vblank counter register */
1131 struct list_head vblank_event_list;
1132 spinlock_t event_lock;
1136 struct drm_agp_head *agp; /**< AGP data */
1138 struct pci_dev *pdev; /**< PCI device structure */
1140 struct pci_controller *hose;
1143 struct platform_device *platformdev; /**< Platform device struture */
1144 struct usb_device *usbdev;
1146 struct drm_sg_mem *sg; /**< Scatter gather memory */
1147 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1148 struct drm_sigdata sigdata; /**< For block_all_signals */
1151 struct drm_local_map *agp_buffer_map;
1152 unsigned int agp_buffer_token;
1154 struct drm_mode_config mode_config; /**< Current mode config */
1156 /** \name GEM information */
1158 struct mutex object_name_lock;
1159 struct idr object_name_idr;
1160 struct drm_vma_offset_manager *vma_offset_manager;
1162 int switch_power_state;
1165 #define DRM_SWITCH_POWER_ON 0
1166 #define DRM_SWITCH_POWER_OFF 1
1167 #define DRM_SWITCH_POWER_CHANGING 2
1168 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1170 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1173 return ((dev->driver->driver_features & feature) ? 1 : 0);
1176 static inline void drm_device_set_unplugged(struct drm_device *dev)
1179 atomic_set(&dev->unplugged, 1);
1182 static inline int drm_device_is_unplugged(struct drm_device *dev)
1184 int ret = atomic_read(&dev->unplugged);
1189 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1191 return mutex_is_locked(&dev->mode_config.mutex);
1194 static inline bool drm_is_render_client(const struct drm_file *file_priv)
1196 return file_priv->minor->type == DRM_MINOR_RENDER;
1199 static inline bool drm_is_control_client(const struct drm_file *file_priv)
1201 return file_priv->minor->type == DRM_MINOR_CONTROL;
1204 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1206 return file_priv->minor->type == DRM_MINOR_LEGACY;
1209 /******************************************************************/
1210 /** \name Internal function definitions */
1213 /* Driver support (drm_drv.h) */
1214 extern long drm_ioctl(struct file *filp,
1215 unsigned int cmd, unsigned long arg);
1216 extern long drm_compat_ioctl(struct file *filp,
1217 unsigned int cmd, unsigned long arg);
1218 extern int drm_lastclose(struct drm_device *dev);
1219 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
1221 /* Device support (drm_fops.h) */
1222 extern struct mutex drm_global_mutex;
1223 extern int drm_open(struct inode *inode, struct file *filp);
1224 extern int drm_stub_open(struct inode *inode, struct file *filp);
1225 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1226 size_t count, loff_t *offset);
1227 extern int drm_release(struct inode *inode, struct file *filp);
1229 /* Mapping support (drm_vm.h) */
1230 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1231 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1232 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1233 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1234 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1236 /* Memory management support (drm_memory.h) */
1237 #include <drm/drm_memory.h>
1240 /* Misc. IOCTL support (drm_ioctl.h) */
1241 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1242 struct drm_file *file_priv);
1243 extern int drm_getunique(struct drm_device *dev, void *data,
1244 struct drm_file *file_priv);
1245 extern int drm_setunique(struct drm_device *dev, void *data,
1246 struct drm_file *file_priv);
1247 extern int drm_getmap(struct drm_device *dev, void *data,
1248 struct drm_file *file_priv);
1249 extern int drm_getclient(struct drm_device *dev, void *data,
1250 struct drm_file *file_priv);
1251 extern int drm_getstats(struct drm_device *dev, void *data,
1252 struct drm_file *file_priv);
1253 extern int drm_getcap(struct drm_device *dev, void *data,
1254 struct drm_file *file_priv);
1255 extern int drm_setclientcap(struct drm_device *dev, void *data,
1256 struct drm_file *file_priv);
1257 extern int drm_setversion(struct drm_device *dev, void *data,
1258 struct drm_file *file_priv);
1259 extern int drm_noop(struct drm_device *dev, void *data,
1260 struct drm_file *file_priv);
1262 /* Context IOCTL support (drm_context.h) */
1263 extern int drm_resctx(struct drm_device *dev, void *data,
1264 struct drm_file *file_priv);
1265 extern int drm_addctx(struct drm_device *dev, void *data,
1266 struct drm_file *file_priv);
1267 extern int drm_getctx(struct drm_device *dev, void *data,
1268 struct drm_file *file_priv);
1269 extern int drm_switchctx(struct drm_device *dev, void *data,
1270 struct drm_file *file_priv);
1271 extern int drm_newctx(struct drm_device *dev, void *data,
1272 struct drm_file *file_priv);
1273 extern int drm_rmctx(struct drm_device *dev, void *data,
1274 struct drm_file *file_priv);
1276 extern int drm_ctxbitmap_init(struct drm_device *dev);
1277 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1278 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1280 extern int drm_setsareactx(struct drm_device *dev, void *data,
1281 struct drm_file *file_priv);
1282 extern int drm_getsareactx(struct drm_device *dev, void *data,
1283 struct drm_file *file_priv);
1285 /* Authentication IOCTL support (drm_auth.h) */
1286 extern int drm_getmagic(struct drm_device *dev, void *data,
1287 struct drm_file *file_priv);
1288 extern int drm_authmagic(struct drm_device *dev, void *data,
1289 struct drm_file *file_priv);
1290 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1292 /* Cache management (drm_cache.c) */
1293 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1294 void drm_clflush_sg(struct sg_table *st);
1295 void drm_clflush_virt_range(void *addr, unsigned long length);
1297 /* Locking IOCTL support (drm_lock.h) */
1298 extern int drm_lock(struct drm_device *dev, void *data,
1299 struct drm_file *file_priv);
1300 extern int drm_unlock(struct drm_device *dev, void *data,
1301 struct drm_file *file_priv);
1302 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1303 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1304 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1307 * These are exported to drivers so that they can implement fencing using
1308 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1311 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1313 /* Buffer management support (drm_bufs.h) */
1314 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1315 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1316 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1317 unsigned int size, enum drm_map_type type,
1318 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1319 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1320 struct drm_file *file_priv);
1321 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1322 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1323 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1324 struct drm_file *file_priv);
1325 extern int drm_addbufs(struct drm_device *dev, void *data,
1326 struct drm_file *file_priv);
1327 extern int drm_infobufs(struct drm_device *dev, void *data,
1328 struct drm_file *file_priv);
1329 extern int drm_markbufs(struct drm_device *dev, void *data,
1330 struct drm_file *file_priv);
1331 extern int drm_freebufs(struct drm_device *dev, void *data,
1332 struct drm_file *file_priv);
1333 extern int drm_mapbufs(struct drm_device *dev, void *data,
1334 struct drm_file *file_priv);
1335 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1336 struct drm_file *file_priv);
1338 /* DMA support (drm_dma.h) */
1339 extern int drm_legacy_dma_setup(struct drm_device *dev);
1340 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1341 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1342 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1343 struct drm_file *filp);
1345 /* IRQ support (drm_irq.h) */
1346 extern int drm_control(struct drm_device *dev, void *data,
1347 struct drm_file *file_priv);
1348 extern int drm_irq_install(struct drm_device *dev, int irq);
1349 extern int drm_irq_uninstall(struct drm_device *dev);
1351 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1352 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1353 struct drm_file *filp);
1354 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1355 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1356 struct timeval *vblanktime);
1357 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1358 struct drm_pending_vblank_event *e);
1359 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1360 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1361 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1362 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1363 extern void drm_vblank_on(struct drm_device *dev, int crtc);
1364 extern void drm_vblank_cleanup(struct drm_device *dev);
1365 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1366 struct timeval *tvblank, unsigned flags);
1367 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1368 int crtc, int *max_error,
1369 struct timeval *vblank_time,
1371 const struct drm_crtc *refcrtc,
1372 const struct drm_display_mode *mode);
1373 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1374 const struct drm_display_mode *mode);
1377 /* Modesetting support */
1378 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1379 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1380 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1381 struct drm_file *file_priv);
1383 /* AGP/GART support (drm_agpsupport.h) */
1385 #include <drm/drm_agpsupport.h>
1387 /* Stub support (drm_stub.h) */
1388 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1389 struct drm_file *file_priv);
1390 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1391 struct drm_file *file_priv);
1392 struct drm_master *drm_master_create(struct drm_minor *minor);
1393 extern struct drm_master *drm_master_get(struct drm_master *master);
1394 extern void drm_master_put(struct drm_master **master);
1396 extern void drm_put_dev(struct drm_device *dev);
1397 extern void drm_unplug_dev(struct drm_device *dev);
1398 extern unsigned int drm_debug;
1399 extern unsigned int drm_rnodes;
1400 extern unsigned int drm_universal_planes;
1402 extern unsigned int drm_vblank_offdelay;
1403 extern unsigned int drm_timestamp_precision;
1404 extern unsigned int drm_timestamp_monotonic;
1406 extern struct class *drm_class;
1407 extern struct dentry *drm_debugfs_root;
1409 extern struct idr drm_minors_idr;
1411 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1413 /* Debugfs support */
1414 #if defined(CONFIG_DEBUG_FS)
1415 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1416 struct dentry *root);
1417 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1418 int count, struct dentry *root,
1419 struct drm_minor *minor);
1420 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1421 int count, struct drm_minor *minor);
1422 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1424 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1425 struct dentry *root)
1430 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1431 int count, struct dentry *root,
1432 struct drm_minor *minor)
1437 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1438 int count, struct drm_minor *minor)
1443 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1449 /* Info file support */
1450 extern int drm_name_info(struct seq_file *m, void *data);
1451 extern int drm_vm_info(struct seq_file *m, void *data);
1452 extern int drm_bufs_info(struct seq_file *m, void *data);
1453 extern int drm_vblank_info(struct seq_file *m, void *data);
1454 extern int drm_clients_info(struct seq_file *m, void* data);
1455 extern int drm_gem_name_info(struct seq_file *m, void *data);
1458 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1459 struct drm_gem_object *obj, int flags);
1460 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1461 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1463 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1464 struct dma_buf *dma_buf);
1465 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1466 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1467 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1469 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1470 struct drm_file *file_priv);
1471 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1472 struct drm_file *file_priv);
1474 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1475 dma_addr_t *addrs, int max_pages);
1476 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1477 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1479 int drm_gem_dumb_destroy(struct drm_file *file,
1480 struct drm_device *dev,
1483 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1484 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1485 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1488 extern int drm_vma_info(struct seq_file *m, void *data);
1491 /* Scatter Gather Support (drm_scatter.h) */
1492 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1493 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1494 struct drm_file *file_priv);
1495 extern int drm_sg_free(struct drm_device *dev, void *data,
1496 struct drm_file *file_priv);
1498 /* ATI PCIGART support (ati_pcigart.h) */
1499 extern int drm_ati_pcigart_init(struct drm_device *dev,
1500 struct drm_ati_pcigart_info * gart_info);
1501 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1502 struct drm_ati_pcigart_info * gart_info);
1504 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1506 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1507 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1508 extern int drm_pci_set_unique(struct drm_device *dev,
1509 struct drm_master *master,
1510 struct drm_unique *u);
1512 /* sysfs support (drm_sysfs.c) */
1513 struct drm_sysfs_class;
1514 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1515 extern void drm_sysfs_destroy(void);
1516 extern int drm_sysfs_device_add(struct drm_minor *minor);
1517 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1518 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1519 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1520 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1522 /* Graphics Execution Manager library functions (drm_gem.c) */
1523 int drm_gem_init(struct drm_device *dev);
1524 void drm_gem_destroy(struct drm_device *dev);
1525 void drm_gem_object_release(struct drm_gem_object *obj);
1526 void drm_gem_object_free(struct kref *kref);
1527 int drm_gem_object_init(struct drm_device *dev,
1528 struct drm_gem_object *obj, size_t size);
1529 void drm_gem_private_object_init(struct drm_device *dev,
1530 struct drm_gem_object *obj, size_t size);
1531 void drm_gem_vm_open(struct vm_area_struct *vma);
1532 void drm_gem_vm_close(struct vm_area_struct *vma);
1533 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1534 struct vm_area_struct *vma);
1535 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1537 #include <drm/drm_global.h>
1540 drm_gem_object_reference(struct drm_gem_object *obj)
1542 kref_get(&obj->refcount);
1546 drm_gem_object_unreference(struct drm_gem_object *obj)
1549 kref_put(&obj->refcount, drm_gem_object_free);
1553 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1555 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1556 struct drm_device *dev = obj->dev;
1558 mutex_lock(&dev->struct_mutex);
1559 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1560 drm_gem_object_free(&obj->refcount);
1561 mutex_unlock(&dev->struct_mutex);
1565 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1566 struct drm_gem_object *obj,
1568 int drm_gem_handle_create(struct drm_file *file_priv,
1569 struct drm_gem_object *obj,
1571 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1574 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1575 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1576 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1578 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1579 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1580 bool dirty, bool accessed);
1582 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1583 struct drm_file *filp,
1585 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1586 struct drm_file *file_priv);
1587 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1588 struct drm_file *file_priv);
1589 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1590 struct drm_file *file_priv);
1591 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1592 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1594 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1595 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1596 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1598 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1601 struct drm_map_list *_entry;
1602 list_for_each_entry(_entry, &dev->maplist, head)
1603 if (_entry->user_token == token)
1608 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1612 #include <drm/drm_mem_util.h>
1614 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1615 struct device *parent);
1616 void drm_dev_ref(struct drm_device *dev);
1617 void drm_dev_unref(struct drm_device *dev);
1618 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1619 void drm_dev_unregister(struct drm_device *dev);
1621 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
1622 void drm_minor_release(struct drm_minor *minor);
1627 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1629 if (dev->driver->device_is_agp != NULL) {
1630 int err = (*dev->driver->device_is_agp) (dev);
1637 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1639 void drm_pci_agp_destroy(struct drm_device *dev);
1641 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1642 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1643 extern int drm_get_pci_dev(struct pci_dev *pdev,
1644 const struct pci_device_id *ent,
1645 struct drm_driver *driver);
1647 #define DRM_PCIE_SPEED_25 1
1648 #define DRM_PCIE_SPEED_50 2
1649 #define DRM_PCIE_SPEED_80 4
1651 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1653 /* platform section */
1654 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1656 /* returns true if currently okay to sleep */
1657 static __inline__ bool drm_can_sleep(void)
1659 if (in_atomic() || in_dbg_master() || irqs_disabled())
1664 #endif /* __KERNEL__ */