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 #define DRIVER_BUS_PCI 0x1
147 #define DRIVER_BUS_PLATFORM 0x2
148 #define DRIVER_BUS_USB 0x3
149 #define DRIVER_BUS_HOST1X 0x4
151 /***********************************************************************/
152 /** \name Begin the DRM... */
155 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
156 also include looping detection. */
158 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
159 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
160 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
162 #define DRM_MAP_HASH_OFFSET 0x10000000
166 /***********************************************************************/
167 /** \name Macros to make printk easier */
173 * \param fmt printf() like format string.
174 * \param arg arguments
176 #define DRM_ERROR(fmt, ...) \
177 drm_err(__func__, fmt, ##__VA_ARGS__)
180 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
182 * \param fmt printf() like format string.
183 * \param arg arguments
185 #define DRM_ERROR_RATELIMITED(fmt, ...) \
187 static DEFINE_RATELIMIT_STATE(_rs, \
188 DEFAULT_RATELIMIT_INTERVAL, \
189 DEFAULT_RATELIMIT_BURST); \
191 if (__ratelimit(&_rs)) \
192 drm_err(__func__, fmt, ##__VA_ARGS__); \
195 #define DRM_INFO(fmt, ...) \
196 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
198 #define DRM_INFO_ONCE(fmt, ...) \
199 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
204 * \param fmt printf() like format string.
205 * \param arg arguments
208 #define DRM_DEBUG(fmt, args...) \
210 if (unlikely(drm_debug & DRM_UT_CORE)) \
211 drm_ut_debug_printk(__func__, fmt, ##args); \
214 #define DRM_DEBUG_DRIVER(fmt, args...) \
216 if (unlikely(drm_debug & DRM_UT_DRIVER)) \
217 drm_ut_debug_printk(__func__, fmt, ##args); \
219 #define DRM_DEBUG_KMS(fmt, args...) \
221 if (unlikely(drm_debug & DRM_UT_KMS)) \
222 drm_ut_debug_printk(__func__, fmt, ##args); \
224 #define DRM_DEBUG_PRIME(fmt, args...) \
226 if (unlikely(drm_debug & DRM_UT_PRIME)) \
227 drm_ut_debug_printk(__func__, fmt, ##args); \
230 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
231 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
232 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
233 #define DRM_DEBUG(fmt, arg...) do { } while (0)
238 /***********************************************************************/
239 /** \name Internal types and structures */
242 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
244 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
247 * Test that the hardware lock is held by the caller, returning otherwise.
249 * \param dev DRM device.
250 * \param filp file pointer of the caller.
252 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
254 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
255 _file_priv->master->lock.file_priv != _file_priv) { \
256 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
257 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
258 _file_priv->master->lock.file_priv, _file_priv); \
264 * Ioctl function type.
266 * \param inode device inode.
267 * \param file_priv DRM file private pointer.
268 * \param cmd command.
269 * \param arg argument.
271 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
272 struct drm_file *file_priv);
274 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
277 #define DRM_IOCTL_NR(n) _IOC_NR(n)
278 #define DRM_MAJOR 226
281 #define DRM_MASTER 0x2
282 #define DRM_ROOT_ONLY 0x4
283 #define DRM_CONTROL_ALLOW 0x8
284 #define DRM_UNLOCKED 0x10
285 #define DRM_RENDER_ALLOW 0x20
287 struct drm_ioctl_desc {
291 unsigned int cmd_drv;
296 * Creates a driver or general drm_ioctl_desc array entry for the given
297 * ioctl, for use by drm_ioctl().
300 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
301 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
303 struct drm_magic_entry {
304 struct list_head head;
305 struct drm_hash_item hash_item;
306 struct drm_file *priv;
309 struct drm_vma_entry {
310 struct list_head head;
311 struct vm_area_struct *vma;
319 int idx; /**< Index into master buflist */
320 int total; /**< Buffer size */
321 int order; /**< log-base-2(total) */
322 int used; /**< Amount of buffer in use (for DMA) */
323 unsigned long offset; /**< Byte offset (used internally) */
324 void *address; /**< Address of buffer */
325 unsigned long bus_address; /**< Bus address of buffer */
326 struct drm_buf *next; /**< Kernel-only: used for free list */
327 __volatile__ int waiting; /**< On kernel DMA queue */
328 __volatile__ int pending; /**< On hardware DMA queue */
329 struct drm_file *file_priv; /**< Private of holding file descr */
330 int context; /**< Kernel queue for this buffer */
331 int while_locked; /**< Dispatch this buffer while locked */
339 } list; /**< Which list we're on */
341 int dev_priv_size; /**< Size of buffer private storage */
342 void *dev_private; /**< Per-buffer private storage */
345 /** bufs is one longer than it has to be */
346 struct drm_waitlist {
347 int count; /**< Number of possible buffers */
348 struct drm_buf **bufs; /**< List of pointers to buffers */
349 struct drm_buf **rp; /**< Read pointer */
350 struct drm_buf **wp; /**< Write pointer */
351 struct drm_buf **end; /**< End pointer */
352 spinlock_t read_lock;
353 spinlock_t write_lock;
356 struct drm_freelist {
357 int initialized; /**< Freelist in use */
358 atomic_t count; /**< Number of free buffers */
359 struct drm_buf *next; /**< End pointer */
361 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
362 int low_mark; /**< Low water mark */
363 int high_mark; /**< High water mark */
364 atomic_t wfh; /**< If waiting for high mark */
368 typedef struct drm_dma_handle {
375 * Buffer entry. There is one of this for each buffer size order.
377 struct drm_buf_entry {
378 int buf_size; /**< size */
379 int buf_count; /**< number of buffers */
380 struct drm_buf *buflist; /**< buffer list */
383 struct drm_dma_handle **seglist;
385 struct drm_freelist freelist;
388 /* Event queued up for userspace to read */
389 struct drm_pending_event {
390 struct drm_event *event;
391 struct list_head link;
392 struct drm_file *file_priv;
393 pid_t pid; /* pid of requester, no guarantee it's valid by the time
394 we deliver the event, for tracing only */
395 void (*destroy)(struct drm_pending_event *event);
398 /* initial implementaton using a linked list - todo hashtab */
399 struct drm_prime_file_private {
400 struct list_head head;
404 /** File private data */
406 unsigned always_authenticated :1;
407 unsigned authenticated :1;
408 unsigned is_master :1; /* this file private is a master for a minor */
409 /* true when the client has asked us to expose stereo 3D mode flags */
410 unsigned stereo_allowed :1;
415 struct list_head lhead;
416 struct drm_minor *minor;
417 unsigned long lock_count;
419 /** Mapping of mm object handles to object pointers. */
420 struct idr object_idr;
421 /** Lock for synchronization of access to object_idr. */
422 spinlock_t table_lock;
427 struct drm_master *master; /* master this node is currently associated with
428 N.B. not always minor->master */
430 * fbs - List of framebuffers associated with this file.
432 * Protected by fbs_lock. Note that the fbs list holds a reference on
433 * the fb object to prevent it from untimely disappearing.
435 struct list_head fbs;
436 struct mutex fbs_lock;
438 wait_queue_head_t event_wait;
439 struct list_head event_list;
442 struct drm_prime_file_private prime;
447 atomic_t use_count; /**< Outstanding uses (+1) */
448 atomic_t finalization; /**< Finalization in progress */
449 atomic_t block_count; /**< Count of processes waiting */
450 atomic_t block_read; /**< Queue blocked for reads */
451 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
452 atomic_t block_write; /**< Queue blocked for writes */
453 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
454 atomic_t total_queued; /**< Total queued statistic */
455 atomic_t total_flushed; /**< Total flushes statistic */
456 atomic_t total_locks; /**< Total locks statistics */
457 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
458 struct drm_waitlist waitlist; /**< Pending buffers */
459 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
465 struct drm_lock_data {
466 struct drm_hw_lock *hw_lock; /**< Hardware lock */
467 /** Private of lock holder's file (NULL=kernel) */
468 struct drm_file *file_priv;
469 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
470 unsigned long lock_time; /**< Time of last lock in jiffies */
472 uint32_t kernel_waiters;
473 uint32_t user_waiters;
480 struct drm_device_dma {
482 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
483 int buf_count; /**< total number of buffers */
484 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
486 int page_count; /**< number of pages */
487 unsigned long *pagelist; /**< page list */
488 unsigned long byte_count;
490 _DRM_DMA_USE_AGP = 0x01,
491 _DRM_DMA_USE_SG = 0x02,
492 _DRM_DMA_USE_FB = 0x04,
493 _DRM_DMA_USE_PCI_RO = 0x08
499 * AGP memory entry. Stored as a doubly linked list.
502 unsigned long handle; /**< handle */
503 struct agp_memory *memory;
504 unsigned long bound; /**< address */
506 struct list_head head;
512 * \sa drm_agp_init() and drm_device::agp.
514 struct drm_agp_head {
515 struct agp_kern_info agp_info; /**< AGP device information */
516 struct list_head memory;
517 unsigned long mode; /**< AGP mode */
518 struct agp_bridge_data *bridge;
519 int enabled; /**< whether the AGP bus as been enabled */
520 int acquired; /**< whether the AGP device has been acquired */
523 int cant_use_aperture;
524 unsigned long page_mask;
528 * Scatter-gather memory.
531 unsigned long handle;
534 struct page **pagelist;
540 struct drm_hw_lock *lock;
545 * Kernel side of a mapping
547 struct drm_local_map {
548 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
549 unsigned long size; /**< Requested physical size (bytes) */
550 enum drm_map_type type; /**< Type of memory to map */
551 enum drm_map_flags flags; /**< Flags */
552 void *handle; /**< User-space: "Handle" to pass to mmap() */
553 /**< Kernel-space: kernel-virtual address */
554 int mtrr; /**< MTRR slot used */
557 typedef struct drm_local_map drm_local_map_t;
562 struct drm_map_list {
563 struct list_head head; /**< list head */
564 struct drm_hash_item hash;
565 struct drm_local_map *map; /**< mapping */
567 struct drm_master *master;
571 * Context handle list
573 struct drm_ctx_list {
574 struct list_head head; /**< list head */
575 drm_context_t handle; /**< context handle */
576 struct drm_file *tag; /**< associated fd private data */
579 /* location of GART table */
580 #define DRM_ATI_GART_MAIN 1
581 #define DRM_ATI_GART_FB 2
583 #define DRM_ATI_GART_PCI 1
584 #define DRM_ATI_GART_PCIE 2
585 #define DRM_ATI_GART_IGP 3
587 struct drm_ati_pcigart_info {
588 int gart_table_location;
592 dma_addr_t table_mask;
593 struct drm_dma_handle *table_handle;
594 struct drm_local_map mapping;
599 * This structure defines the drm_mm memory object, which will be used by the
600 * DRM for its buffer objects.
602 struct drm_gem_object {
603 /** Reference count of this object */
604 struct kref refcount;
607 * handle_count - gem file_priv handle count of this object
609 * Each handle also holds a reference. Note that when the handle_count
610 * drops to 0 any global names (e.g. the id in the flink namespace) will
613 * Protected by dev->object_name_lock.
615 unsigned handle_count;
617 /** Related drm device */
618 struct drm_device *dev;
620 /** File representing the shmem storage */
623 /* Mapping info for this object */
624 struct drm_vma_offset_node vma_node;
627 * Size of the object, in bytes. Immutable over the object's
633 * Global name for this object, starts at 1. 0 means unnamed.
634 * Access is covered by the object_name_lock in the related drm_device
639 * Memory domains. These monitor which caches contain read/write data
640 * related to the object. When transitioning from one set of domains
641 * to another, the driver is called to ensure that caches are suitably
642 * flushed and invalidated
644 uint32_t read_domains;
645 uint32_t write_domain;
648 * While validating an exec operation, the
649 * new read/write domain values are computed here.
650 * They will be transferred to the above values
651 * at the point that any cache flushing occurs
653 uint32_t pending_read_domains;
654 uint32_t pending_write_domain;
657 * dma_buf - dma buf associated with this GEM object
659 * Pointer to the dma-buf associated with this gem object (either
660 * through importing or exporting). We break the resulting reference
661 * loop when the last gem handle for this object is released.
663 * Protected by obj->object_name_lock
665 struct dma_buf *dma_buf;
668 * import_attach - dma buf attachment backing this object
670 * Any foreign dma_buf imported as a gem object has this set to the
671 * attachment point for the device. This is invariant over the lifetime
674 * The driver's ->gem_free_object callback is responsible for cleaning
675 * up the dma_buf attachment and references acquired at import time.
677 * Note that the drm gem/prime core does not depend upon drivers setting
678 * this field any more. So for drivers where this doesn't make sense
679 * (e.g. virtual devices or a displaylink behind an usb bus) they can
680 * simply leave it as NULL.
682 struct dma_buf_attachment *import_attach;
685 #include <drm/drm_crtc.h>
687 /* per-master structure */
690 struct kref refcount; /* refcount for this master */
692 struct drm_minor *minor; /**< link back to minor we are a master for */
694 char *unique; /**< Unique identifier: e.g., busid */
695 int unique_len; /**< Length of unique field */
696 int unique_size; /**< amount allocated */
698 int blocked; /**< Blocked due to VC switch? */
700 /** \name Authentication */
702 struct drm_open_hash magiclist;
703 struct list_head magicfree;
706 struct drm_lock_data lock; /**< Information on hardware lock */
708 void *driver_priv; /**< Private structure for driver to use */
711 /* Size of ringbuffer for vblank timestamps. Just double-buffer
712 * in initial implementation.
714 #define DRM_VBLANKTIME_RBSIZE 2
716 /* Flags and return codes for get_vblank_timestamp() driver function. */
717 #define DRM_CALLED_FROM_VBLIRQ 1
718 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
719 #define DRM_VBLANKTIME_INVBL (1 << 1)
721 /* get_scanout_position() return flags */
722 #define DRM_SCANOUTPOS_VALID (1 << 0)
723 #define DRM_SCANOUTPOS_INVBL (1 << 1)
724 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
728 int (*get_irq)(struct drm_device *dev);
729 const char *(*get_name)(struct drm_device *dev);
730 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
731 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
732 struct drm_unique *unique);
733 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
737 * DRM driver structure. This structure represent the common code for
738 * a family of cards. There will one drm_device for each card present
742 int (*load) (struct drm_device *, unsigned long flags);
743 int (*firstopen) (struct drm_device *);
744 int (*open) (struct drm_device *, struct drm_file *);
745 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
746 void (*postclose) (struct drm_device *, struct drm_file *);
747 void (*lastclose) (struct drm_device *);
748 int (*unload) (struct drm_device *);
749 int (*suspend) (struct drm_device *, pm_message_t state);
750 int (*resume) (struct drm_device *);
751 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
752 int (*dma_quiescent) (struct drm_device *);
753 int (*context_dtor) (struct drm_device *dev, int context);
756 * get_vblank_counter - get raw hardware vblank counter
758 * @crtc: counter to fetch
760 * Driver callback for fetching a raw hardware vblank counter for @crtc.
761 * If a device doesn't have a hardware counter, the driver can simply
762 * return the value of drm_vblank_count. The DRM core will account for
763 * missed vblank events while interrupts where disabled based on system
766 * Wraparound handling and loss of events due to modesetting is dealt
767 * with in the DRM core code.
770 * Raw vblank counter value.
772 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
775 * enable_vblank - enable vblank interrupt events
777 * @crtc: which irq to enable
779 * Enable vblank interrupts for @crtc. If the device doesn't have
780 * a hardware vblank counter, this routine should be a no-op, since
781 * interrupts will have to stay on to keep the count accurate.
784 * Zero on success, appropriate errno if the given @crtc's vblank
785 * interrupt cannot be enabled.
787 int (*enable_vblank) (struct drm_device *dev, int crtc);
790 * disable_vblank - disable vblank interrupt events
792 * @crtc: which irq to enable
794 * Disable vblank interrupts for @crtc. If the device doesn't have
795 * a hardware vblank counter, this routine should be a no-op, since
796 * interrupts will have to stay on to keep the count accurate.
798 void (*disable_vblank) (struct drm_device *dev, int crtc);
801 * Called by \c drm_device_is_agp. Typically used to determine if a
802 * card is really attached to AGP or not.
804 * \param dev DRM device handle
807 * One of three values is returned depending on whether or not the
808 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
809 * (return of 1), or may or may not be AGP (return of 2).
811 int (*device_is_agp) (struct drm_device *dev);
814 * Called by vblank timestamping code.
816 * Return the current display scanout position from a crtc, and an
817 * optional accurate ktime_get timestamp of when position was measured.
819 * \param dev DRM device.
820 * \param crtc Id of the crtc to query.
821 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
822 * \param *vpos Target location for current vertical scanout position.
823 * \param *hpos Target location for current horizontal scanout position.
824 * \param *stime Target location for timestamp taken immediately before
825 * scanout position query. Can be NULL to skip timestamp.
826 * \param *etime Target location for timestamp taken immediately after
827 * scanout position query. Can be NULL to skip timestamp.
829 * Returns vpos as a positive number while in active scanout area.
830 * Returns vpos as a negative number inside vblank, counting the number
831 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
832 * until start of active scanout / end of vblank."
834 * \return Flags, or'ed together as follows:
836 * DRM_SCANOUTPOS_VALID = Query successful.
837 * DRM_SCANOUTPOS_INVBL = Inside vblank.
838 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
839 * this flag means that returned position may be offset by a constant
840 * but unknown small number of scanlines wrt. real scanout position.
843 int (*get_scanout_position) (struct drm_device *dev, int crtc,
845 int *vpos, int *hpos, ktime_t *stime,
849 * Called by \c drm_get_last_vbltimestamp. Should return a precise
850 * timestamp when the most recent VBLANK interval ended or will end.
852 * Specifically, the timestamp in @vblank_time should correspond as
853 * closely as possible to the time when the first video scanline of
854 * the video frame after the end of VBLANK will start scanning out,
855 * the time immediately after end of the VBLANK interval. If the
856 * @crtc is currently inside VBLANK, this will be a time in the future.
857 * If the @crtc is currently scanning out a frame, this will be the
858 * past start time of the current scanout. This is meant to adhere
859 * to the OpenML OML_sync_control extension specification.
861 * \param dev dev DRM device handle.
862 * \param crtc crtc for which timestamp should be returned.
863 * \param *max_error Maximum allowable timestamp error in nanoseconds.
864 * Implementation should strive to provide timestamp
865 * with an error of at most *max_error nanoseconds.
866 * Returns true upper bound on error for timestamp.
867 * \param *vblank_time Target location for returned vblank timestamp.
868 * \param flags 0 = Defaults, no special treatment needed.
869 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
870 * irq handler. Some drivers need to apply some workarounds
871 * for gpu-specific vblank irq quirks if flag is set.
874 * Zero if timestamping isn't supported in current display mode or a
875 * negative number on failure. A positive status code on success,
876 * which describes how the vblank_time timestamp was computed.
878 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
880 struct timeval *vblank_time,
883 /* these have to be filled in */
885 irqreturn_t(*irq_handler) (int irq, void *arg);
886 void (*irq_preinstall) (struct drm_device *dev);
887 int (*irq_postinstall) (struct drm_device *dev);
888 void (*irq_uninstall) (struct drm_device *dev);
890 /* Master routines */
891 int (*master_create)(struct drm_device *dev, struct drm_master *master);
892 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
894 * master_set is called whenever the minor master is set.
895 * master_drop is called whenever the minor master is dropped.
898 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
900 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
903 int (*debugfs_init)(struct drm_minor *minor);
904 void (*debugfs_cleanup)(struct drm_minor *minor);
907 * Driver-specific constructor for drm_gem_objects, to set up
908 * obj->driver_private.
910 * Returns 0 on success.
912 void (*gem_free_object) (struct drm_gem_object *obj);
913 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
914 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
917 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
918 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
919 uint32_t handle, uint32_t flags, int *prime_fd);
920 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
921 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
922 int prime_fd, uint32_t *handle);
923 /* export GEM -> dmabuf */
924 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
925 struct drm_gem_object *obj, int flags);
926 /* import dmabuf -> GEM */
927 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
928 struct dma_buf *dma_buf);
929 /* low-level interface used by drm_gem_prime_{import,export} */
930 int (*gem_prime_pin)(struct drm_gem_object *obj);
931 void (*gem_prime_unpin)(struct drm_gem_object *obj);
932 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
933 struct drm_gem_object *(*gem_prime_import_sg_table)(
934 struct drm_device *dev, size_t size,
935 struct sg_table *sgt);
936 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
937 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
938 int (*gem_prime_mmap)(struct drm_gem_object *obj,
939 struct vm_area_struct *vma);
941 /* vga arb irq handler */
942 void (*vgaarb_irq)(struct drm_device *dev, bool state);
944 /* dumb alloc support */
945 int (*dumb_create)(struct drm_file *file_priv,
946 struct drm_device *dev,
947 struct drm_mode_create_dumb *args);
948 int (*dumb_map_offset)(struct drm_file *file_priv,
949 struct drm_device *dev, uint32_t handle,
951 int (*dumb_destroy)(struct drm_file *file_priv,
952 struct drm_device *dev,
955 /* Driver private ops for this object */
956 const struct vm_operations_struct *gem_vm_ops;
967 const struct drm_ioctl_desc *ioctls;
969 const struct file_operations *fops;
971 struct pci_driver *pci;
972 struct platform_device *platform_device;
973 struct usb_driver *usb;
977 /* List of devices hanging off this driver with stealth attach. */
978 struct list_head legacy_dev_list;
981 enum drm_minor_type {
989 * Info file list entry. This structure represents a debugfs or proc file to
990 * be created by the drm core
992 struct drm_info_list {
993 const char *name; /** file name */
994 int (*show)(struct seq_file*, void*); /** show callback */
995 u32 driver_features; /**< Required driver features for this entry */
1000 * debugfs node structure. This structure represents a debugfs file.
1002 struct drm_info_node {
1003 struct list_head list;
1004 struct drm_minor *minor;
1005 const struct drm_info_list *info_ent;
1006 struct dentry *dent;
1010 * DRM minor structure. This structure represents a drm minor number.
1013 int index; /**< Minor device number */
1014 int type; /**< Control or render */
1015 struct device *kdev; /**< Linux device */
1016 struct drm_device *dev;
1018 struct dentry *debugfs_root;
1020 struct list_head debugfs_list;
1021 struct mutex debugfs_lock; /* Protects debugfs_list. */
1023 struct drm_master *master; /* currently active master for this node */
1024 struct drm_mode_group mode_group;
1028 struct drm_pending_vblank_event {
1029 struct drm_pending_event base;
1031 struct drm_event_vblank event;
1034 struct drm_vblank_crtc {
1035 wait_queue_head_t queue; /**< VBLANK wait queue */
1036 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1037 atomic_t count; /**< number of VBLANK interrupts */
1038 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1039 u32 last; /* protected by dev->vbl_lock, used */
1040 /* for wraparound handling */
1041 u32 last_wait; /* Last vblank seqno waited per CRTC */
1042 unsigned int inmodeset; /* Display driver is setting mode */
1043 bool enabled; /* so we don't call enable more than
1048 * DRM device structure. This structure represent a complete card that
1049 * may contain multiple heads.
1052 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1053 char *devname; /**< For /proc/interrupts */
1054 int if_version; /**< Highest interface version set */
1056 /** \name Lifetime Management */
1058 struct kref ref; /**< Object ref-count */
1059 struct device *dev; /**< Device structure of bus-device */
1060 struct drm_driver *driver; /**< DRM driver managing the device */
1061 void *dev_private; /**< DRM driver private data */
1062 struct drm_minor *control; /**< Control node */
1063 struct drm_minor *primary; /**< Primary node */
1064 struct drm_minor *render; /**< Render node */
1065 atomic_t unplugged; /**< Flag whether dev is dead */
1066 struct inode *anon_inode; /**< inode for private address-space */
1071 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1072 struct mutex struct_mutex; /**< For others */
1075 /** \name Usage Counters */
1077 int open_count; /**< Outstanding files open */
1078 int buf_use; /**< Buffers in use -- cannot alloc */
1079 atomic_t buf_alloc; /**< Buffer allocation in progress */
1082 struct list_head filelist;
1084 /** \name Memory management */
1086 struct list_head maplist; /**< Linked list of regions */
1087 struct drm_open_hash map_hash; /**< User token hash table for maps */
1089 /** \name Context handle management */
1091 struct list_head ctxlist; /**< Linked list of context handles */
1092 struct mutex ctxlist_mutex; /**< For ctxlist */
1096 struct list_head vmalist; /**< List of vmas (for debugging) */
1100 /** \name DMA support */
1102 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1105 /** \name Context support */
1107 bool irq_enabled; /**< True if irq handler is enabled */
1108 __volatile__ long context_flag; /**< Context swapping flag */
1109 int last_context; /**< Last current context */
1112 /** \name VBLANK IRQ support */
1116 * At load time, disabling the vblank interrupt won't be allowed since
1117 * old clients may not call the modeset ioctl and therefore misbehave.
1118 * Once the modeset ioctl *has* been called though, we can safely
1119 * disable them when unused.
1121 bool vblank_disable_allowed;
1123 /* array of size num_crtcs */
1124 struct drm_vblank_crtc *vblank;
1126 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1127 spinlock_t vbl_lock;
1128 struct timer_list vblank_disable_timer;
1130 u32 max_vblank_count; /**< size of vblank counter register */
1135 struct list_head vblank_event_list;
1136 spinlock_t event_lock;
1140 struct drm_agp_head *agp; /**< AGP data */
1142 struct pci_dev *pdev; /**< PCI device structure */
1144 struct pci_controller *hose;
1147 struct platform_device *platformdev; /**< Platform device struture */
1148 struct usb_device *usbdev;
1150 struct drm_sg_mem *sg; /**< Scatter gather memory */
1151 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1152 struct drm_sigdata sigdata; /**< For block_all_signals */
1155 struct drm_local_map *agp_buffer_map;
1156 unsigned int agp_buffer_token;
1158 struct drm_mode_config mode_config; /**< Current mode config */
1160 /** \name GEM information */
1162 struct mutex object_name_lock;
1163 struct idr object_name_idr;
1164 struct drm_vma_offset_manager *vma_offset_manager;
1166 int switch_power_state;
1169 #define DRM_SWITCH_POWER_ON 0
1170 #define DRM_SWITCH_POWER_OFF 1
1171 #define DRM_SWITCH_POWER_CHANGING 2
1172 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1174 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1177 return ((dev->driver->driver_features & feature) ? 1 : 0);
1180 static inline int drm_dev_to_irq(struct drm_device *dev)
1182 return dev->driver->bus->get_irq(dev);
1185 static inline void drm_device_set_unplugged(struct drm_device *dev)
1188 atomic_set(&dev->unplugged, 1);
1191 static inline int drm_device_is_unplugged(struct drm_device *dev)
1193 int ret = atomic_read(&dev->unplugged);
1198 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1200 return mutex_is_locked(&dev->mode_config.mutex);
1203 static inline bool drm_is_render_client(const struct drm_file *file_priv)
1205 return file_priv->minor->type == DRM_MINOR_RENDER;
1208 static inline bool drm_is_control_client(const struct drm_file *file_priv)
1210 return file_priv->minor->type == DRM_MINOR_CONTROL;
1213 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1215 return file_priv->minor->type == DRM_MINOR_LEGACY;
1218 /******************************************************************/
1219 /** \name Internal function definitions */
1222 /* Driver support (drm_drv.h) */
1223 extern long drm_ioctl(struct file *filp,
1224 unsigned int cmd, unsigned long arg);
1225 extern long drm_compat_ioctl(struct file *filp,
1226 unsigned int cmd, unsigned long arg);
1227 extern int drm_lastclose(struct drm_device *dev);
1229 /* Device support (drm_fops.h) */
1230 extern struct mutex drm_global_mutex;
1231 extern int drm_open(struct inode *inode, struct file *filp);
1232 extern int drm_stub_open(struct inode *inode, struct file *filp);
1233 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1234 size_t count, loff_t *offset);
1235 extern int drm_release(struct inode *inode, struct file *filp);
1237 /* Mapping support (drm_vm.h) */
1238 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1239 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1240 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1241 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1242 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1244 /* Memory management support (drm_memory.h) */
1245 #include <drm/drm_memory.h>
1248 /* Misc. IOCTL support (drm_ioctl.h) */
1249 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1250 struct drm_file *file_priv);
1251 extern int drm_getunique(struct drm_device *dev, void *data,
1252 struct drm_file *file_priv);
1253 extern int drm_setunique(struct drm_device *dev, void *data,
1254 struct drm_file *file_priv);
1255 extern int drm_getmap(struct drm_device *dev, void *data,
1256 struct drm_file *file_priv);
1257 extern int drm_getclient(struct drm_device *dev, void *data,
1258 struct drm_file *file_priv);
1259 extern int drm_getstats(struct drm_device *dev, void *data,
1260 struct drm_file *file_priv);
1261 extern int drm_getcap(struct drm_device *dev, void *data,
1262 struct drm_file *file_priv);
1263 extern int drm_setclientcap(struct drm_device *dev, void *data,
1264 struct drm_file *file_priv);
1265 extern int drm_setversion(struct drm_device *dev, void *data,
1266 struct drm_file *file_priv);
1267 extern int drm_noop(struct drm_device *dev, void *data,
1268 struct drm_file *file_priv);
1270 /* Context IOCTL support (drm_context.h) */
1271 extern int drm_resctx(struct drm_device *dev, void *data,
1272 struct drm_file *file_priv);
1273 extern int drm_addctx(struct drm_device *dev, void *data,
1274 struct drm_file *file_priv);
1275 extern int drm_getctx(struct drm_device *dev, void *data,
1276 struct drm_file *file_priv);
1277 extern int drm_switchctx(struct drm_device *dev, void *data,
1278 struct drm_file *file_priv);
1279 extern int drm_newctx(struct drm_device *dev, void *data,
1280 struct drm_file *file_priv);
1281 extern int drm_rmctx(struct drm_device *dev, void *data,
1282 struct drm_file *file_priv);
1284 extern int drm_ctxbitmap_init(struct drm_device *dev);
1285 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1286 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1288 extern int drm_setsareactx(struct drm_device *dev, void *data,
1289 struct drm_file *file_priv);
1290 extern int drm_getsareactx(struct drm_device *dev, void *data,
1291 struct drm_file *file_priv);
1293 /* Authentication IOCTL support (drm_auth.h) */
1294 extern int drm_getmagic(struct drm_device *dev, void *data,
1295 struct drm_file *file_priv);
1296 extern int drm_authmagic(struct drm_device *dev, void *data,
1297 struct drm_file *file_priv);
1298 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1300 /* Cache management (drm_cache.c) */
1301 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1302 void drm_clflush_sg(struct sg_table *st);
1303 void drm_clflush_virt_range(char *addr, unsigned long length);
1305 /* Locking IOCTL support (drm_lock.h) */
1306 extern int drm_lock(struct drm_device *dev, void *data,
1307 struct drm_file *file_priv);
1308 extern int drm_unlock(struct drm_device *dev, void *data,
1309 struct drm_file *file_priv);
1310 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1311 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1312 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1315 * These are exported to drivers so that they can implement fencing using
1316 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1319 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1321 /* Buffer management support (drm_bufs.h) */
1322 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1323 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1324 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1325 unsigned int size, enum drm_map_type type,
1326 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1327 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1328 struct drm_file *file_priv);
1329 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1330 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1331 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1332 struct drm_file *file_priv);
1333 extern int drm_addbufs(struct drm_device *dev, void *data,
1334 struct drm_file *file_priv);
1335 extern int drm_infobufs(struct drm_device *dev, void *data,
1336 struct drm_file *file_priv);
1337 extern int drm_markbufs(struct drm_device *dev, void *data,
1338 struct drm_file *file_priv);
1339 extern int drm_freebufs(struct drm_device *dev, void *data,
1340 struct drm_file *file_priv);
1341 extern int drm_mapbufs(struct drm_device *dev, void *data,
1342 struct drm_file *file_priv);
1343 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1344 struct drm_file *file_priv);
1346 /* DMA support (drm_dma.h) */
1347 extern int drm_legacy_dma_setup(struct drm_device *dev);
1348 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1349 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1350 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1351 struct drm_file *filp);
1353 /* IRQ support (drm_irq.h) */
1354 extern int drm_control(struct drm_device *dev, void *data,
1355 struct drm_file *file_priv);
1356 extern int drm_irq_install(struct drm_device *dev);
1357 extern int drm_irq_uninstall(struct drm_device *dev);
1359 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1360 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1361 struct drm_file *filp);
1362 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1363 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1364 struct timeval *vblanktime);
1365 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1366 struct drm_pending_vblank_event *e);
1367 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1368 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1369 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1370 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1371 extern void drm_vblank_cleanup(struct drm_device *dev);
1372 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1373 struct timeval *tvblank, unsigned flags);
1374 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1375 int crtc, int *max_error,
1376 struct timeval *vblank_time,
1378 const struct drm_crtc *refcrtc,
1379 const struct drm_display_mode *mode);
1380 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1381 const struct drm_display_mode *mode);
1384 /* Modesetting support */
1385 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1386 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1387 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1388 struct drm_file *file_priv);
1390 /* AGP/GART support (drm_agpsupport.h) */
1392 #include <drm/drm_agpsupport.h>
1394 /* Stub support (drm_stub.h) */
1395 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1396 struct drm_file *file_priv);
1397 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1398 struct drm_file *file_priv);
1399 struct drm_master *drm_master_create(struct drm_minor *minor);
1400 extern struct drm_master *drm_master_get(struct drm_master *master);
1401 extern void drm_master_put(struct drm_master **master);
1403 extern void drm_put_dev(struct drm_device *dev);
1404 extern void drm_unplug_dev(struct drm_device *dev);
1405 extern unsigned int drm_debug;
1406 extern unsigned int drm_rnodes;
1408 extern unsigned int drm_vblank_offdelay;
1409 extern unsigned int drm_timestamp_precision;
1410 extern unsigned int drm_timestamp_monotonic;
1412 extern struct class *drm_class;
1413 extern struct dentry *drm_debugfs_root;
1415 extern struct idr drm_minors_idr;
1417 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1419 /* Debugfs support */
1420 #if defined(CONFIG_DEBUG_FS)
1421 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1422 struct dentry *root);
1423 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1424 int count, struct dentry *root,
1425 struct drm_minor *minor);
1426 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1427 int count, struct drm_minor *minor);
1428 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1430 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1431 struct dentry *root)
1436 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1437 int count, struct dentry *root,
1438 struct drm_minor *minor)
1443 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1444 int count, struct drm_minor *minor)
1449 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1455 /* Info file support */
1456 extern int drm_name_info(struct seq_file *m, void *data);
1457 extern int drm_vm_info(struct seq_file *m, void *data);
1458 extern int drm_bufs_info(struct seq_file *m, void *data);
1459 extern int drm_vblank_info(struct seq_file *m, void *data);
1460 extern int drm_clients_info(struct seq_file *m, void* data);
1461 extern int drm_gem_name_info(struct seq_file *m, void *data);
1464 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1465 struct drm_gem_object *obj, int flags);
1466 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1467 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1469 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1470 struct dma_buf *dma_buf);
1471 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1472 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1473 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1475 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1476 struct drm_file *file_priv);
1477 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1478 struct drm_file *file_priv);
1480 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1481 dma_addr_t *addrs, int max_pages);
1482 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1483 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1485 int drm_gem_dumb_destroy(struct drm_file *file,
1486 struct drm_device *dev,
1489 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1490 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1491 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1494 extern int drm_vma_info(struct seq_file *m, void *data);
1497 /* Scatter Gather Support (drm_scatter.h) */
1498 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1499 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1500 struct drm_file *file_priv);
1501 extern int drm_sg_free(struct drm_device *dev, void *data,
1502 struct drm_file *file_priv);
1504 /* ATI PCIGART support (ati_pcigart.h) */
1505 extern int drm_ati_pcigart_init(struct drm_device *dev,
1506 struct drm_ati_pcigart_info * gart_info);
1507 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1508 struct drm_ati_pcigart_info * gart_info);
1510 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1512 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1513 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1515 /* sysfs support (drm_sysfs.c) */
1516 struct drm_sysfs_class;
1517 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1518 extern void drm_sysfs_destroy(void);
1519 extern int drm_sysfs_device_add(struct drm_minor *minor);
1520 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1521 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1522 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1523 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1525 /* Graphics Execution Manager library functions (drm_gem.c) */
1526 int drm_gem_init(struct drm_device *dev);
1527 void drm_gem_destroy(struct drm_device *dev);
1528 void drm_gem_object_release(struct drm_gem_object *obj);
1529 void drm_gem_object_free(struct kref *kref);
1530 int drm_gem_object_init(struct drm_device *dev,
1531 struct drm_gem_object *obj, size_t size);
1532 void drm_gem_private_object_init(struct drm_device *dev,
1533 struct drm_gem_object *obj, size_t size);
1534 void drm_gem_vm_open(struct vm_area_struct *vma);
1535 void drm_gem_vm_close(struct vm_area_struct *vma);
1536 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1537 struct vm_area_struct *vma);
1538 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1540 #include <drm/drm_global.h>
1543 drm_gem_object_reference(struct drm_gem_object *obj)
1545 kref_get(&obj->refcount);
1549 drm_gem_object_unreference(struct drm_gem_object *obj)
1552 kref_put(&obj->refcount, drm_gem_object_free);
1556 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1558 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1559 struct drm_device *dev = obj->dev;
1561 mutex_lock(&dev->struct_mutex);
1562 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1563 drm_gem_object_free(&obj->refcount);
1564 mutex_unlock(&dev->struct_mutex);
1568 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1569 struct drm_gem_object *obj,
1571 int drm_gem_handle_create(struct drm_file *file_priv,
1572 struct drm_gem_object *obj,
1574 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1577 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1578 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1579 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1581 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1582 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1583 bool dirty, bool accessed);
1585 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1586 struct drm_file *filp,
1588 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1589 struct drm_file *file_priv);
1590 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1591 struct drm_file *file_priv);
1592 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1593 struct drm_file *file_priv);
1594 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1595 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1597 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1598 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1599 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1601 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1604 struct drm_map_list *_entry;
1605 list_for_each_entry(_entry, &dev->maplist, head)
1606 if (_entry->user_token == token)
1611 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1615 #include <drm/drm_mem_util.h>
1617 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1618 struct device *parent);
1619 void drm_dev_ref(struct drm_device *dev);
1620 void drm_dev_unref(struct drm_device *dev);
1621 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1622 void drm_dev_unregister(struct drm_device *dev);
1624 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
1625 void drm_minor_release(struct drm_minor *minor);
1630 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1632 if (dev->driver->device_is_agp != NULL) {
1633 int err = (*dev->driver->device_is_agp) (dev);
1640 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1642 void drm_pci_agp_destroy(struct drm_device *dev);
1644 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1645 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1646 extern int drm_get_pci_dev(struct pci_dev *pdev,
1647 const struct pci_device_id *ent,
1648 struct drm_driver *driver);
1650 #define DRM_PCIE_SPEED_25 1
1651 #define DRM_PCIE_SPEED_50 2
1652 #define DRM_PCIE_SPEED_80 4
1654 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1656 /* platform section */
1657 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1659 /* returns true if currently okay to sleep */
1660 static __inline__ bool drm_can_sleep(void)
1662 if (in_atomic() || in_dbg_master() || irqs_disabled())
1667 #endif /* __KERNEL__ */