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(3, 4)
125 void drm_ut_debug_printk(const char *prefix,
126 const char *function_name,
127 const char *format, ...);
128 extern __printf(2, 3)
129 int drm_err(const char *func, const char *format, ...);
131 /***********************************************************************/
132 /** \name DRM template customization defaults */
135 /* driver capabilities and requirements mask */
136 #define DRIVER_USE_AGP 0x1
137 #define DRIVER_PCI_DMA 0x8
138 #define DRIVER_SG 0x10
139 #define DRIVER_HAVE_DMA 0x20
140 #define DRIVER_HAVE_IRQ 0x40
141 #define DRIVER_IRQ_SHARED 0x80
142 #define DRIVER_GEM 0x1000
143 #define DRIVER_MODESET 0x2000
144 #define DRIVER_PRIME 0x4000
145 #define DRIVER_RENDER 0x8000
147 #define DRIVER_BUS_PCI 0x1
148 #define DRIVER_BUS_PLATFORM 0x2
149 #define DRIVER_BUS_USB 0x3
150 #define DRIVER_BUS_HOST1X 0x4
152 /***********************************************************************/
153 /** \name Begin the DRM... */
156 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
157 also include looping detection. */
159 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
160 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
161 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
163 #define DRM_MAP_HASH_OFFSET 0x10000000
167 /***********************************************************************/
168 /** \name Macros to make printk easier */
174 * \param fmt printf() like format string.
175 * \param arg arguments
177 #define DRM_ERROR(fmt, ...) \
178 drm_err(__func__, fmt, ##__VA_ARGS__)
181 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
183 * \param fmt printf() like format string.
184 * \param arg arguments
186 #define DRM_ERROR_RATELIMITED(fmt, ...) \
188 static DEFINE_RATELIMIT_STATE(_rs, \
189 DEFAULT_RATELIMIT_INTERVAL, \
190 DEFAULT_RATELIMIT_BURST); \
192 if (__ratelimit(&_rs)) \
193 drm_err(__func__, fmt, ##__VA_ARGS__); \
196 #define DRM_INFO(fmt, ...) \
197 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
199 #define DRM_INFO_ONCE(fmt, ...) \
200 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
205 * \param fmt printf() like format string.
206 * \param arg arguments
209 #define DRM_DEBUG(fmt, args...) \
211 if (unlikely(drm_debug & DRM_UT_CORE)) \
212 drm_ut_debug_printk(DRM_NAME, __func__, \
216 #define DRM_DEBUG_DRIVER(fmt, args...) \
218 if (unlikely(drm_debug & DRM_UT_DRIVER)) \
219 drm_ut_debug_printk(DRM_NAME, __func__, \
222 #define DRM_DEBUG_KMS(fmt, args...) \
224 if (unlikely(drm_debug & DRM_UT_KMS)) \
225 drm_ut_debug_printk(DRM_NAME, __func__, \
228 #define DRM_DEBUG_PRIME(fmt, args...) \
230 if (unlikely(drm_debug & DRM_UT_PRIME)) \
231 drm_ut_debug_printk(DRM_NAME, __func__, \
235 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
236 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
237 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
238 #define DRM_DEBUG(fmt, arg...) do { } while (0)
243 /***********************************************************************/
244 /** \name Internal types and structures */
247 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
249 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
252 * Test that the hardware lock is held by the caller, returning otherwise.
254 * \param dev DRM device.
255 * \param filp file pointer of the caller.
257 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
259 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
260 _file_priv->master->lock.file_priv != _file_priv) { \
261 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
262 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
263 _file_priv->master->lock.file_priv, _file_priv); \
269 * Ioctl function type.
271 * \param inode device inode.
272 * \param file_priv DRM file private pointer.
273 * \param cmd command.
274 * \param arg argument.
276 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
277 struct drm_file *file_priv);
279 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
282 #define DRM_IOCTL_NR(n) _IOC_NR(n)
283 #define DRM_MAJOR 226
286 #define DRM_MASTER 0x2
287 #define DRM_ROOT_ONLY 0x4
288 #define DRM_CONTROL_ALLOW 0x8
289 #define DRM_UNLOCKED 0x10
290 #define DRM_RENDER_ALLOW 0x20
292 struct drm_ioctl_desc {
296 unsigned int cmd_drv;
301 * Creates a driver or general drm_ioctl_desc array entry for the given
302 * ioctl, for use by drm_ioctl().
305 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
306 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
308 struct drm_magic_entry {
309 struct list_head head;
310 struct drm_hash_item hash_item;
311 struct drm_file *priv;
314 struct drm_vma_entry {
315 struct list_head head;
316 struct vm_area_struct *vma;
324 int idx; /**< Index into master buflist */
325 int total; /**< Buffer size */
326 int order; /**< log-base-2(total) */
327 int used; /**< Amount of buffer in use (for DMA) */
328 unsigned long offset; /**< Byte offset (used internally) */
329 void *address; /**< Address of buffer */
330 unsigned long bus_address; /**< Bus address of buffer */
331 struct drm_buf *next; /**< Kernel-only: used for free list */
332 __volatile__ int waiting; /**< On kernel DMA queue */
333 __volatile__ int pending; /**< On hardware DMA queue */
334 struct drm_file *file_priv; /**< Private of holding file descr */
335 int context; /**< Kernel queue for this buffer */
336 int while_locked; /**< Dispatch this buffer while locked */
344 } list; /**< Which list we're on */
346 int dev_priv_size; /**< Size of buffer private storage */
347 void *dev_private; /**< Per-buffer private storage */
350 /** bufs is one longer than it has to be */
351 struct drm_waitlist {
352 int count; /**< Number of possible buffers */
353 struct drm_buf **bufs; /**< List of pointers to buffers */
354 struct drm_buf **rp; /**< Read pointer */
355 struct drm_buf **wp; /**< Write pointer */
356 struct drm_buf **end; /**< End pointer */
357 spinlock_t read_lock;
358 spinlock_t write_lock;
361 struct drm_freelist {
362 int initialized; /**< Freelist in use */
363 atomic_t count; /**< Number of free buffers */
364 struct drm_buf *next; /**< End pointer */
366 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
367 int low_mark; /**< Low water mark */
368 int high_mark; /**< High water mark */
369 atomic_t wfh; /**< If waiting for high mark */
373 typedef struct drm_dma_handle {
380 * Buffer entry. There is one of this for each buffer size order.
382 struct drm_buf_entry {
383 int buf_size; /**< size */
384 int buf_count; /**< number of buffers */
385 struct drm_buf *buflist; /**< buffer list */
388 struct drm_dma_handle **seglist;
390 struct drm_freelist freelist;
393 /* Event queued up for userspace to read */
394 struct drm_pending_event {
395 struct drm_event *event;
396 struct list_head link;
397 struct drm_file *file_priv;
398 pid_t pid; /* pid of requester, no guarantee it's valid by the time
399 we deliver the event, for tracing only */
400 void (*destroy)(struct drm_pending_event *event);
403 /* initial implementaton using a linked list - todo hashtab */
404 struct drm_prime_file_private {
405 struct list_head head;
409 /** File private data */
411 unsigned always_authenticated :1;
412 unsigned authenticated :1;
413 unsigned is_master :1; /* this file private is a master for a minor */
414 /* true when the client has asked us to expose stereo 3D mode flags */
415 unsigned stereo_allowed :1;
420 struct list_head lhead;
421 struct drm_minor *minor;
422 unsigned long lock_count;
424 /** Mapping of mm object handles to object pointers. */
425 struct idr object_idr;
426 /** Lock for synchronization of access to object_idr. */
427 spinlock_t table_lock;
432 struct drm_master *master; /* master this node is currently associated with
433 N.B. not always minor->master */
435 * fbs - List of framebuffers associated with this file.
437 * Protected by fbs_lock. Note that the fbs list holds a reference on
438 * the fb object to prevent it from untimely disappearing.
440 struct list_head fbs;
441 struct mutex fbs_lock;
443 wait_queue_head_t event_wait;
444 struct list_head event_list;
447 struct drm_prime_file_private prime;
452 atomic_t use_count; /**< Outstanding uses (+1) */
453 atomic_t finalization; /**< Finalization in progress */
454 atomic_t block_count; /**< Count of processes waiting */
455 atomic_t block_read; /**< Queue blocked for reads */
456 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
457 atomic_t block_write; /**< Queue blocked for writes */
458 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
459 atomic_t total_queued; /**< Total queued statistic */
460 atomic_t total_flushed; /**< Total flushes statistic */
461 atomic_t total_locks; /**< Total locks statistics */
462 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
463 struct drm_waitlist waitlist; /**< Pending buffers */
464 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
470 struct drm_lock_data {
471 struct drm_hw_lock *hw_lock; /**< Hardware lock */
472 /** Private of lock holder's file (NULL=kernel) */
473 struct drm_file *file_priv;
474 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
475 unsigned long lock_time; /**< Time of last lock in jiffies */
477 uint32_t kernel_waiters;
478 uint32_t user_waiters;
485 struct drm_device_dma {
487 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
488 int buf_count; /**< total number of buffers */
489 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
491 int page_count; /**< number of pages */
492 unsigned long *pagelist; /**< page list */
493 unsigned long byte_count;
495 _DRM_DMA_USE_AGP = 0x01,
496 _DRM_DMA_USE_SG = 0x02,
497 _DRM_DMA_USE_FB = 0x04,
498 _DRM_DMA_USE_PCI_RO = 0x08
504 * AGP memory entry. Stored as a doubly linked list.
507 unsigned long handle; /**< handle */
508 struct agp_memory *memory;
509 unsigned long bound; /**< address */
511 struct list_head head;
517 * \sa drm_agp_init() and drm_device::agp.
519 struct drm_agp_head {
520 struct agp_kern_info agp_info; /**< AGP device information */
521 struct list_head memory;
522 unsigned long mode; /**< AGP mode */
523 struct agp_bridge_data *bridge;
524 int enabled; /**< whether the AGP bus as been enabled */
525 int acquired; /**< whether the AGP device has been acquired */
528 int cant_use_aperture;
529 unsigned long page_mask;
533 * Scatter-gather memory.
536 unsigned long handle;
539 struct page **pagelist;
545 struct drm_hw_lock *lock;
550 * Kernel side of a mapping
552 struct drm_local_map {
553 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
554 unsigned long size; /**< Requested physical size (bytes) */
555 enum drm_map_type type; /**< Type of memory to map */
556 enum drm_map_flags flags; /**< Flags */
557 void *handle; /**< User-space: "Handle" to pass to mmap() */
558 /**< Kernel-space: kernel-virtual address */
559 int mtrr; /**< MTRR slot used */
562 typedef struct drm_local_map drm_local_map_t;
567 struct drm_map_list {
568 struct list_head head; /**< list head */
569 struct drm_hash_item hash;
570 struct drm_local_map *map; /**< mapping */
572 struct drm_master *master;
576 * Context handle list
578 struct drm_ctx_list {
579 struct list_head head; /**< list head */
580 drm_context_t handle; /**< context handle */
581 struct drm_file *tag; /**< associated fd private data */
584 /* location of GART table */
585 #define DRM_ATI_GART_MAIN 1
586 #define DRM_ATI_GART_FB 2
588 #define DRM_ATI_GART_PCI 1
589 #define DRM_ATI_GART_PCIE 2
590 #define DRM_ATI_GART_IGP 3
592 struct drm_ati_pcigart_info {
593 int gart_table_location;
597 dma_addr_t table_mask;
598 struct drm_dma_handle *table_handle;
599 struct drm_local_map mapping;
604 * This structure defines the drm_mm memory object, which will be used by the
605 * DRM for its buffer objects.
607 struct drm_gem_object {
608 /** Reference count of this object */
609 struct kref refcount;
612 * handle_count - gem file_priv handle count of this object
614 * Each handle also holds a reference. Note that when the handle_count
615 * drops to 0 any global names (e.g. the id in the flink namespace) will
618 * Protected by dev->object_name_lock.
620 unsigned handle_count;
622 /** Related drm device */
623 struct drm_device *dev;
625 /** File representing the shmem storage */
628 /* Mapping info for this object */
629 struct drm_vma_offset_node vma_node;
632 * Size of the object, in bytes. Immutable over the object's
638 * Global name for this object, starts at 1. 0 means unnamed.
639 * Access is covered by the object_name_lock in the related drm_device
644 * Memory domains. These monitor which caches contain read/write data
645 * related to the object. When transitioning from one set of domains
646 * to another, the driver is called to ensure that caches are suitably
647 * flushed and invalidated
649 uint32_t read_domains;
650 uint32_t write_domain;
653 * While validating an exec operation, the
654 * new read/write domain values are computed here.
655 * They will be transferred to the above values
656 * at the point that any cache flushing occurs
658 uint32_t pending_read_domains;
659 uint32_t pending_write_domain;
662 * dma_buf - dma buf associated with this GEM object
664 * Pointer to the dma-buf associated with this gem object (either
665 * through importing or exporting). We break the resulting reference
666 * loop when the last gem handle for this object is released.
668 * Protected by obj->object_name_lock
670 struct dma_buf *dma_buf;
673 * import_attach - dma buf attachment backing this object
675 * Any foreign dma_buf imported as a gem object has this set to the
676 * attachment point for the device. This is invariant over the lifetime
679 * The driver's ->gem_free_object callback is responsible for cleaning
680 * up the dma_buf attachment and references acquired at import time.
682 * Note that the drm gem/prime core does not depend upon drivers setting
683 * this field any more. So for drivers where this doesn't make sense
684 * (e.g. virtual devices or a displaylink behind an usb bus) they can
685 * simply leave it as NULL.
687 struct dma_buf_attachment *import_attach;
690 #include <drm/drm_crtc.h>
692 /* per-master structure */
695 struct kref refcount; /* refcount for this master */
697 struct list_head head; /**< each minor contains a list of masters */
698 struct drm_minor *minor; /**< link back to minor we are a master for */
700 char *unique; /**< Unique identifier: e.g., busid */
701 int unique_len; /**< Length of unique field */
702 int unique_size; /**< amount allocated */
704 int blocked; /**< Blocked due to VC switch? */
706 /** \name Authentication */
708 struct drm_open_hash magiclist;
709 struct list_head magicfree;
712 struct drm_lock_data lock; /**< Information on hardware lock */
714 void *driver_priv; /**< Private structure for driver to use */
717 /* Size of ringbuffer for vblank timestamps. Just double-buffer
718 * in initial implementation.
720 #define DRM_VBLANKTIME_RBSIZE 2
722 /* Flags and return codes for get_vblank_timestamp() driver function. */
723 #define DRM_CALLED_FROM_VBLIRQ 1
724 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
725 #define DRM_VBLANKTIME_INVBL (1 << 1)
727 /* get_scanout_position() return flags */
728 #define DRM_SCANOUTPOS_VALID (1 << 0)
729 #define DRM_SCANOUTPOS_INVBL (1 << 1)
730 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
734 int (*get_irq)(struct drm_device *dev);
735 const char *(*get_name)(struct drm_device *dev);
736 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
737 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
738 struct drm_unique *unique);
739 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
743 * DRM driver structure. This structure represent the common code for
744 * a family of cards. There will one drm_device for each card present
748 int (*load) (struct drm_device *, unsigned long flags);
749 int (*firstopen) (struct drm_device *);
750 int (*open) (struct drm_device *, struct drm_file *);
751 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
752 void (*postclose) (struct drm_device *, struct drm_file *);
753 void (*lastclose) (struct drm_device *);
754 int (*unload) (struct drm_device *);
755 int (*suspend) (struct drm_device *, pm_message_t state);
756 int (*resume) (struct drm_device *);
757 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
758 int (*dma_quiescent) (struct drm_device *);
759 int (*context_dtor) (struct drm_device *dev, int context);
762 * get_vblank_counter - get raw hardware vblank counter
764 * @crtc: counter to fetch
766 * Driver callback for fetching a raw hardware vblank counter for @crtc.
767 * If a device doesn't have a hardware counter, the driver can simply
768 * return the value of drm_vblank_count. The DRM core will account for
769 * missed vblank events while interrupts where disabled based on system
772 * Wraparound handling and loss of events due to modesetting is dealt
773 * with in the DRM core code.
776 * Raw vblank counter value.
778 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
781 * enable_vblank - enable vblank interrupt events
783 * @crtc: which irq to enable
785 * Enable vblank interrupts for @crtc. If the device doesn't have
786 * a hardware vblank counter, this routine should be a no-op, since
787 * interrupts will have to stay on to keep the count accurate.
790 * Zero on success, appropriate errno if the given @crtc's vblank
791 * interrupt cannot be enabled.
793 int (*enable_vblank) (struct drm_device *dev, int crtc);
796 * disable_vblank - disable vblank interrupt events
798 * @crtc: which irq to enable
800 * Disable vblank interrupts for @crtc. If the device doesn't have
801 * a hardware vblank counter, this routine should be a no-op, since
802 * interrupts will have to stay on to keep the count accurate.
804 void (*disable_vblank) (struct drm_device *dev, int crtc);
807 * Called by \c drm_device_is_agp. Typically used to determine if a
808 * card is really attached to AGP or not.
810 * \param dev DRM device handle
813 * One of three values is returned depending on whether or not the
814 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
815 * (return of 1), or may or may not be AGP (return of 2).
817 int (*device_is_agp) (struct drm_device *dev);
820 * Called by vblank timestamping code.
822 * Return the current display scanout position from a crtc, and an
823 * optional accurate ktime_get timestamp of when position was measured.
825 * \param dev DRM device.
826 * \param crtc Id of the crtc to query.
827 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
828 * \param *vpos Target location for current vertical scanout position.
829 * \param *hpos Target location for current horizontal scanout position.
830 * \param *stime Target location for timestamp taken immediately before
831 * scanout position query. Can be NULL to skip timestamp.
832 * \param *etime Target location for timestamp taken immediately after
833 * scanout position query. Can be NULL to skip timestamp.
835 * Returns vpos as a positive number while in active scanout area.
836 * Returns vpos as a negative number inside vblank, counting the number
837 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
838 * until start of active scanout / end of vblank."
840 * \return Flags, or'ed together as follows:
842 * DRM_SCANOUTPOS_VALID = Query successful.
843 * DRM_SCANOUTPOS_INVBL = Inside vblank.
844 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
845 * this flag means that returned position may be offset by a constant
846 * but unknown small number of scanlines wrt. real scanout position.
849 int (*get_scanout_position) (struct drm_device *dev, int crtc,
851 int *vpos, int *hpos, ktime_t *stime,
855 * Called by \c drm_get_last_vbltimestamp. Should return a precise
856 * timestamp when the most recent VBLANK interval ended or will end.
858 * Specifically, the timestamp in @vblank_time should correspond as
859 * closely as possible to the time when the first video scanline of
860 * the video frame after the end of VBLANK will start scanning out,
861 * the time immediately after end of the VBLANK interval. If the
862 * @crtc is currently inside VBLANK, this will be a time in the future.
863 * If the @crtc is currently scanning out a frame, this will be the
864 * past start time of the current scanout. This is meant to adhere
865 * to the OpenML OML_sync_control extension specification.
867 * \param dev dev DRM device handle.
868 * \param crtc crtc for which timestamp should be returned.
869 * \param *max_error Maximum allowable timestamp error in nanoseconds.
870 * Implementation should strive to provide timestamp
871 * with an error of at most *max_error nanoseconds.
872 * Returns true upper bound on error for timestamp.
873 * \param *vblank_time Target location for returned vblank timestamp.
874 * \param flags 0 = Defaults, no special treatment needed.
875 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
876 * irq handler. Some drivers need to apply some workarounds
877 * for gpu-specific vblank irq quirks if flag is set.
880 * Zero if timestamping isn't supported in current display mode or a
881 * negative number on failure. A positive status code on success,
882 * which describes how the vblank_time timestamp was computed.
884 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
886 struct timeval *vblank_time,
889 /* these have to be filled in */
891 irqreturn_t(*irq_handler) (int irq, void *arg);
892 void (*irq_preinstall) (struct drm_device *dev);
893 int (*irq_postinstall) (struct drm_device *dev);
894 void (*irq_uninstall) (struct drm_device *dev);
896 /* Master routines */
897 int (*master_create)(struct drm_device *dev, struct drm_master *master);
898 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
900 * master_set is called whenever the minor master is set.
901 * master_drop is called whenever the minor master is dropped.
904 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
906 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
909 int (*debugfs_init)(struct drm_minor *minor);
910 void (*debugfs_cleanup)(struct drm_minor *minor);
913 * Driver-specific constructor for drm_gem_objects, to set up
914 * obj->driver_private.
916 * Returns 0 on success.
918 void (*gem_free_object) (struct drm_gem_object *obj);
919 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
920 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
923 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
924 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
925 uint32_t handle, uint32_t flags, int *prime_fd);
926 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
927 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
928 int prime_fd, uint32_t *handle);
929 /* export GEM -> dmabuf */
930 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
931 struct drm_gem_object *obj, int flags);
932 /* import dmabuf -> GEM */
933 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
934 struct dma_buf *dma_buf);
935 /* low-level interface used by drm_gem_prime_{import,export} */
936 int (*gem_prime_pin)(struct drm_gem_object *obj);
937 void (*gem_prime_unpin)(struct drm_gem_object *obj);
938 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
939 struct drm_gem_object *(*gem_prime_import_sg_table)(
940 struct drm_device *dev, size_t size,
941 struct sg_table *sgt);
942 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
943 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
944 int (*gem_prime_mmap)(struct drm_gem_object *obj,
945 struct vm_area_struct *vma);
947 /* vga arb irq handler */
948 void (*vgaarb_irq)(struct drm_device *dev, bool state);
950 /* dumb alloc support */
951 int (*dumb_create)(struct drm_file *file_priv,
952 struct drm_device *dev,
953 struct drm_mode_create_dumb *args);
954 int (*dumb_map_offset)(struct drm_file *file_priv,
955 struct drm_device *dev, uint32_t handle,
957 int (*dumb_destroy)(struct drm_file *file_priv,
958 struct drm_device *dev,
961 /* Driver private ops for this object */
962 const struct vm_operations_struct *gem_vm_ops;
973 const struct drm_ioctl_desc *ioctls;
975 const struct file_operations *fops;
977 struct pci_driver *pci;
978 struct platform_device *platform_device;
979 struct usb_driver *usb;
983 /* List of devices hanging off this driver with stealth attach. */
984 struct list_head legacy_dev_list;
987 enum drm_minor_type {
995 * Info file list entry. This structure represents a debugfs or proc file to
996 * be created by the drm core
998 struct drm_info_list {
999 const char *name; /** file name */
1000 int (*show)(struct seq_file*, void*); /** show callback */
1001 u32 driver_features; /**< Required driver features for this entry */
1006 * debugfs node structure. This structure represents a debugfs file.
1008 struct drm_info_node {
1009 struct list_head list;
1010 struct drm_minor *minor;
1011 const struct drm_info_list *info_ent;
1012 struct dentry *dent;
1016 * DRM minor structure. This structure represents a drm minor number.
1019 int index; /**< Minor device number */
1020 int type; /**< Control or render */
1021 struct device *kdev; /**< Linux device */
1022 struct drm_device *dev;
1024 struct dentry *debugfs_root;
1026 struct list_head debugfs_list;
1027 struct mutex debugfs_lock; /* Protects debugfs_list. */
1029 struct drm_master *master; /* currently active master for this node */
1030 struct list_head master_list;
1031 struct drm_mode_group mode_group;
1035 struct drm_pending_vblank_event {
1036 struct drm_pending_event base;
1038 struct drm_event_vblank event;
1041 struct drm_vblank_crtc {
1042 wait_queue_head_t queue; /**< VBLANK wait queue */
1043 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1044 atomic_t count; /**< number of VBLANK interrupts */
1045 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1046 u32 last; /* protected by dev->vbl_lock, used */
1047 /* for wraparound handling */
1048 u32 last_wait; /* Last vblank seqno waited per CRTC */
1049 unsigned int inmodeset; /* Display driver is setting mode */
1050 bool enabled; /* so we don't call enable more than
1055 * DRM device structure. This structure represent a complete card that
1056 * may contain multiple heads.
1059 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1060 char *devname; /**< For /proc/interrupts */
1061 int if_version; /**< Highest interface version set */
1063 /** \name Lifetime Management */
1065 struct kref ref; /**< Object ref-count */
1066 struct device *dev; /**< Device structure of bus-device */
1067 struct drm_driver *driver; /**< DRM driver managing the device */
1068 void *dev_private; /**< DRM driver private data */
1069 struct drm_minor *control; /**< Control node */
1070 struct drm_minor *primary; /**< Primary node */
1071 struct drm_minor *render; /**< Render node */
1072 atomic_t unplugged; /**< Flag whether dev is dead */
1073 struct inode *anon_inode; /**< inode for private address-space */
1078 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1079 struct mutex struct_mutex; /**< For others */
1082 /** \name Usage Counters */
1084 int open_count; /**< Outstanding files open */
1085 int buf_use; /**< Buffers in use -- cannot alloc */
1086 atomic_t buf_alloc; /**< Buffer allocation in progress */
1089 struct list_head filelist;
1091 /** \name Memory management */
1093 struct list_head maplist; /**< Linked list of regions */
1094 struct drm_open_hash map_hash; /**< User token hash table for maps */
1096 /** \name Context handle management */
1098 struct list_head ctxlist; /**< Linked list of context handles */
1099 struct mutex ctxlist_mutex; /**< For ctxlist */
1103 struct list_head vmalist; /**< List of vmas (for debugging) */
1107 /** \name DMA support */
1109 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1112 /** \name Context support */
1114 bool irq_enabled; /**< True if irq handler is enabled */
1115 __volatile__ long context_flag; /**< Context swapping flag */
1116 int last_context; /**< Last current context */
1119 /** \name VBLANK IRQ support */
1123 * At load time, disabling the vblank interrupt won't be allowed since
1124 * old clients may not call the modeset ioctl and therefore misbehave.
1125 * Once the modeset ioctl *has* been called though, we can safely
1126 * disable them when unused.
1128 bool vblank_disable_allowed;
1130 /* array of size num_crtcs */
1131 struct drm_vblank_crtc *vblank;
1133 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1134 spinlock_t vbl_lock;
1135 struct timer_list vblank_disable_timer;
1137 u32 max_vblank_count; /**< size of vblank counter register */
1142 struct list_head vblank_event_list;
1143 spinlock_t event_lock;
1147 struct drm_agp_head *agp; /**< AGP data */
1149 struct pci_dev *pdev; /**< PCI device structure */
1151 struct pci_controller *hose;
1154 struct platform_device *platformdev; /**< Platform device struture */
1155 struct usb_device *usbdev;
1157 struct drm_sg_mem *sg; /**< Scatter gather memory */
1158 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1159 struct drm_sigdata sigdata; /**< For block_all_signals */
1162 struct drm_local_map *agp_buffer_map;
1163 unsigned int agp_buffer_token;
1165 struct drm_mode_config mode_config; /**< Current mode config */
1167 /** \name GEM information */
1169 struct mutex object_name_lock;
1170 struct idr object_name_idr;
1171 struct drm_vma_offset_manager *vma_offset_manager;
1173 int switch_power_state;
1176 #define DRM_SWITCH_POWER_ON 0
1177 #define DRM_SWITCH_POWER_OFF 1
1178 #define DRM_SWITCH_POWER_CHANGING 2
1179 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1181 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1184 return ((dev->driver->driver_features & feature) ? 1 : 0);
1187 static inline int drm_dev_to_irq(struct drm_device *dev)
1189 return dev->driver->bus->get_irq(dev);
1192 static inline void drm_device_set_unplugged(struct drm_device *dev)
1195 atomic_set(&dev->unplugged, 1);
1198 static inline int drm_device_is_unplugged(struct drm_device *dev)
1200 int ret = atomic_read(&dev->unplugged);
1205 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1207 return mutex_is_locked(&dev->mode_config.mutex);
1210 static inline bool drm_is_render_client(struct drm_file *file_priv)
1212 return file_priv->minor->type == DRM_MINOR_RENDER;
1215 /******************************************************************/
1216 /** \name Internal function definitions */
1219 /* Driver support (drm_drv.h) */
1220 extern long drm_ioctl(struct file *filp,
1221 unsigned int cmd, unsigned long arg);
1222 extern long drm_compat_ioctl(struct file *filp,
1223 unsigned int cmd, unsigned long arg);
1224 extern int drm_lastclose(struct drm_device *dev);
1226 /* Device support (drm_fops.h) */
1227 extern struct mutex drm_global_mutex;
1228 extern int drm_open(struct inode *inode, struct file *filp);
1229 extern int drm_stub_open(struct inode *inode, struct file *filp);
1230 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1231 size_t count, loff_t *offset);
1232 extern int drm_release(struct inode *inode, struct file *filp);
1234 /* Mapping support (drm_vm.h) */
1235 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1236 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1237 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1238 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1239 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1241 /* Memory management support (drm_memory.h) */
1242 #include <drm/drm_memory.h>
1245 /* Misc. IOCTL support (drm_ioctl.h) */
1246 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1247 struct drm_file *file_priv);
1248 extern int drm_getunique(struct drm_device *dev, void *data,
1249 struct drm_file *file_priv);
1250 extern int drm_setunique(struct drm_device *dev, void *data,
1251 struct drm_file *file_priv);
1252 extern int drm_getmap(struct drm_device *dev, void *data,
1253 struct drm_file *file_priv);
1254 extern int drm_getclient(struct drm_device *dev, void *data,
1255 struct drm_file *file_priv);
1256 extern int drm_getstats(struct drm_device *dev, void *data,
1257 struct drm_file *file_priv);
1258 extern int drm_getcap(struct drm_device *dev, void *data,
1259 struct drm_file *file_priv);
1260 extern int drm_setclientcap(struct drm_device *dev, void *data,
1261 struct drm_file *file_priv);
1262 extern int drm_setversion(struct drm_device *dev, void *data,
1263 struct drm_file *file_priv);
1264 extern int drm_noop(struct drm_device *dev, void *data,
1265 struct drm_file *file_priv);
1267 /* Context IOCTL support (drm_context.h) */
1268 extern int drm_resctx(struct drm_device *dev, void *data,
1269 struct drm_file *file_priv);
1270 extern int drm_addctx(struct drm_device *dev, void *data,
1271 struct drm_file *file_priv);
1272 extern int drm_getctx(struct drm_device *dev, void *data,
1273 struct drm_file *file_priv);
1274 extern int drm_switchctx(struct drm_device *dev, void *data,
1275 struct drm_file *file_priv);
1276 extern int drm_newctx(struct drm_device *dev, void *data,
1277 struct drm_file *file_priv);
1278 extern int drm_rmctx(struct drm_device *dev, void *data,
1279 struct drm_file *file_priv);
1281 extern int drm_ctxbitmap_init(struct drm_device *dev);
1282 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1283 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1285 extern int drm_setsareactx(struct drm_device *dev, void *data,
1286 struct drm_file *file_priv);
1287 extern int drm_getsareactx(struct drm_device *dev, void *data,
1288 struct drm_file *file_priv);
1290 /* Authentication IOCTL support (drm_auth.h) */
1291 extern int drm_getmagic(struct drm_device *dev, void *data,
1292 struct drm_file *file_priv);
1293 extern int drm_authmagic(struct drm_device *dev, void *data,
1294 struct drm_file *file_priv);
1295 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1297 /* Cache management (drm_cache.c) */
1298 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1299 void drm_clflush_sg(struct sg_table *st);
1300 void drm_clflush_virt_range(char *addr, unsigned long length);
1302 /* Locking IOCTL support (drm_lock.h) */
1303 extern int drm_lock(struct drm_device *dev, void *data,
1304 struct drm_file *file_priv);
1305 extern int drm_unlock(struct drm_device *dev, void *data,
1306 struct drm_file *file_priv);
1307 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1308 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1309 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1312 * These are exported to drivers so that they can implement fencing using
1313 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1316 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1318 /* Buffer management support (drm_bufs.h) */
1319 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1320 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1321 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1322 unsigned int size, enum drm_map_type type,
1323 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1324 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1325 struct drm_file *file_priv);
1326 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1327 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1328 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1329 struct drm_file *file_priv);
1330 extern int drm_addbufs(struct drm_device *dev, void *data,
1331 struct drm_file *file_priv);
1332 extern int drm_infobufs(struct drm_device *dev, void *data,
1333 struct drm_file *file_priv);
1334 extern int drm_markbufs(struct drm_device *dev, void *data,
1335 struct drm_file *file_priv);
1336 extern int drm_freebufs(struct drm_device *dev, void *data,
1337 struct drm_file *file_priv);
1338 extern int drm_mapbufs(struct drm_device *dev, void *data,
1339 struct drm_file *file_priv);
1340 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1341 struct drm_file *file_priv);
1343 /* DMA support (drm_dma.h) */
1344 extern int drm_legacy_dma_setup(struct drm_device *dev);
1345 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1346 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1347 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1348 struct drm_file *filp);
1350 /* IRQ support (drm_irq.h) */
1351 extern int drm_control(struct drm_device *dev, void *data,
1352 struct drm_file *file_priv);
1353 extern int drm_irq_install(struct drm_device *dev);
1354 extern int drm_irq_uninstall(struct drm_device *dev);
1356 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1357 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1358 struct drm_file *filp);
1359 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1360 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1361 struct timeval *vblanktime);
1362 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1363 struct drm_pending_vblank_event *e);
1364 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1365 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1366 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1367 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1368 extern void drm_vblank_cleanup(struct drm_device *dev);
1369 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1370 struct timeval *tvblank, unsigned flags);
1371 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1372 int crtc, int *max_error,
1373 struct timeval *vblank_time,
1375 const struct drm_crtc *refcrtc,
1376 const struct drm_display_mode *mode);
1377 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1378 const struct drm_display_mode *mode);
1381 /* Modesetting support */
1382 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1383 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1384 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1385 struct drm_file *file_priv);
1387 /* AGP/GART support (drm_agpsupport.h) */
1389 #include <drm/drm_agpsupport.h>
1391 /* Stub support (drm_stub.h) */
1392 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1393 struct drm_file *file_priv);
1394 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1395 struct drm_file *file_priv);
1396 struct drm_master *drm_master_create(struct drm_minor *minor);
1397 extern struct drm_master *drm_master_get(struct drm_master *master);
1398 extern void drm_master_put(struct drm_master **master);
1400 extern void drm_put_dev(struct drm_device *dev);
1401 extern void drm_unplug_dev(struct drm_device *dev);
1402 extern unsigned int drm_debug;
1403 extern unsigned int drm_rnodes;
1405 extern unsigned int drm_vblank_offdelay;
1406 extern unsigned int drm_timestamp_precision;
1407 extern unsigned int drm_timestamp_monotonic;
1409 extern struct class *drm_class;
1410 extern struct dentry *drm_debugfs_root;
1412 extern struct idr drm_minors_idr;
1414 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1416 /* Debugfs support */
1417 #if defined(CONFIG_DEBUG_FS)
1418 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1419 struct dentry *root);
1420 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1421 int count, struct dentry *root,
1422 struct drm_minor *minor);
1423 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1424 int count, struct drm_minor *minor);
1425 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1427 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1428 struct dentry *root)
1433 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1434 int count, struct dentry *root,
1435 struct drm_minor *minor)
1440 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1441 int count, struct drm_minor *minor)
1446 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1452 /* Info file support */
1453 extern int drm_name_info(struct seq_file *m, void *data);
1454 extern int drm_vm_info(struct seq_file *m, void *data);
1455 extern int drm_bufs_info(struct seq_file *m, void *data);
1456 extern int drm_vblank_info(struct seq_file *m, void *data);
1457 extern int drm_clients_info(struct seq_file *m, void* data);
1458 extern int drm_gem_name_info(struct seq_file *m, void *data);
1461 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1462 struct drm_gem_object *obj, int flags);
1463 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1464 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1466 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1467 struct dma_buf *dma_buf);
1468 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1469 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1470 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1472 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1473 struct drm_file *file_priv);
1474 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1475 struct drm_file *file_priv);
1477 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1478 dma_addr_t *addrs, int max_pages);
1479 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1480 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1482 int drm_gem_dumb_destroy(struct drm_file *file,
1483 struct drm_device *dev,
1486 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1487 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1488 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1491 extern int drm_vma_info(struct seq_file *m, void *data);
1494 /* Scatter Gather Support (drm_scatter.h) */
1495 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1496 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1497 struct drm_file *file_priv);
1498 extern int drm_sg_free(struct drm_device *dev, void *data,
1499 struct drm_file *file_priv);
1501 /* ATI PCIGART support (ati_pcigart.h) */
1502 extern int drm_ati_pcigart_init(struct drm_device *dev,
1503 struct drm_ati_pcigart_info * gart_info);
1504 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1505 struct drm_ati_pcigart_info * gart_info);
1507 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1509 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1510 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
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__ */