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/miscdevice.h>
48 #include <linux/init.h>
49 #include <linux/file.h>
50 #include <linux/platform_device.h>
51 #include <linux/pci.h>
52 #include <linux/jiffies.h>
53 #include <linux/dma-mapping.h>
55 #include <linux/cdev.h>
56 #include <linux/mutex.h>
58 #include <linux/slab.h>
59 #include <linux/ratelimit.h>
60 #if defined(__alpha__) || defined(__powerpc__)
61 #include <asm/pgtable.h> /* For pte_wrprotect */
64 #include <asm/uaccess.h>
65 #include <linux/types.h>
66 #include <linux/agp_backend.h>
67 #include <linux/workqueue.h>
68 #include <linux/poll.h>
69 #include <asm/pgalloc.h>
71 #include <drm/drm_sarea.h>
72 #include <drm/drm_vma_manager.h>
74 #include <linux/idr.h>
76 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
86 #include <drm/drm_os_linux.h>
87 #include <drm/drm_hashtab.h>
88 #include <drm/drm_mm.h>
90 #define DRM_UT_CORE 0x01
91 #define DRM_UT_DRIVER 0x02
92 #define DRM_UT_KMS 0x04
93 #define DRM_UT_PRIME 0x08
95 * Three debug levels are defined.
96 * drm_core, drm_driver, drm_kms
97 * drm_core level can be used in the generic drm code. For example:
98 * drm_ioctl, drm_mm, drm_memory
99 * The macro definition of DRM_DEBUG is used.
100 * DRM_DEBUG(fmt, args...)
101 * The debug info by using the DRM_DEBUG can be obtained by adding
102 * the boot option of "drm.debug=1".
104 * drm_driver level can be used in the specific drm driver. It is used
105 * to add the debug info related with the drm driver. For example:
106 * i915_drv, i915_dma, i915_gem, radeon_drv,
107 * The macro definition of DRM_DEBUG_DRIVER can be used.
108 * DRM_DEBUG_DRIVER(fmt, args...)
109 * The debug info by using the DRM_DEBUG_DRIVER can be obtained by
110 * adding the boot option of "drm.debug=0x02"
112 * drm_kms level can be used in the KMS code related with specific drm driver.
113 * It is used to add the debug info related with KMS mode. For example:
114 * the connector/crtc ,
115 * The macro definition of DRM_DEBUG_KMS can be used.
116 * DRM_DEBUG_KMS(fmt, args...)
117 * The debug info by using the DRM_DEBUG_KMS can be obtained by
118 * adding the boot option of "drm.debug=0x04"
120 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
121 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
122 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
123 * using the DRM_DEBUG_KMS and DRM_DEBUG.
126 extern __printf(4, 5)
127 void drm_ut_debug_printk(unsigned int request_level,
129 const char *function_name,
130 const char *format, ...);
131 extern __printf(2, 3)
132 int drm_err(const char *func, const char *format, ...);
134 /***********************************************************************/
135 /** \name DRM template customization defaults */
138 /* driver capabilities and requirements mask */
139 #define DRIVER_USE_AGP 0x1
140 #define DRIVER_REQUIRE_AGP 0x2
141 #define DRIVER_PCI_DMA 0x8
142 #define DRIVER_SG 0x10
143 #define DRIVER_HAVE_DMA 0x20
144 #define DRIVER_HAVE_IRQ 0x40
145 #define DRIVER_IRQ_SHARED 0x80
146 #define DRIVER_GEM 0x1000
147 #define DRIVER_MODESET 0x2000
148 #define DRIVER_PRIME 0x4000
149 #define DRIVER_RENDER 0x8000
151 #define DRIVER_BUS_PCI 0x1
152 #define DRIVER_BUS_PLATFORM 0x2
153 #define DRIVER_BUS_USB 0x3
154 #define DRIVER_BUS_HOST1X 0x4
156 /***********************************************************************/
157 /** \name Begin the DRM... */
160 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
161 also include looping detection. */
163 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
164 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
165 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
167 #define DRM_MAP_HASH_OFFSET 0x10000000
171 /***********************************************************************/
172 /** \name Macros to make printk easier */
178 * \param fmt printf() like format string.
179 * \param arg arguments
181 #define DRM_ERROR(fmt, ...) \
182 drm_err(__func__, fmt, ##__VA_ARGS__)
185 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
187 * \param fmt printf() like format string.
188 * \param arg arguments
190 #define DRM_ERROR_RATELIMITED(fmt, ...) \
192 static DEFINE_RATELIMIT_STATE(_rs, \
193 DEFAULT_RATELIMIT_INTERVAL, \
194 DEFAULT_RATELIMIT_BURST); \
196 if (__ratelimit(&_rs)) \
197 drm_err(__func__, fmt, ##__VA_ARGS__); \
200 #define DRM_INFO(fmt, ...) \
201 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
206 * \param fmt printf() like format string.
207 * \param arg arguments
210 #define DRM_DEBUG(fmt, args...) \
212 drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, \
213 __func__, fmt, ##args); \
216 #define DRM_DEBUG_DRIVER(fmt, args...) \
218 drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME, \
219 __func__, fmt, ##args); \
221 #define DRM_DEBUG_KMS(fmt, args...) \
223 drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
224 __func__, fmt, ##args); \
226 #define DRM_DEBUG_PRIME(fmt, args...) \
228 drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
229 __func__, fmt, ##args); \
231 #define DRM_LOG(fmt, args...) \
233 drm_ut_debug_printk(DRM_UT_CORE, NULL, \
234 NULL, fmt, ##args); \
236 #define DRM_LOG_KMS(fmt, args...) \
238 drm_ut_debug_printk(DRM_UT_KMS, NULL, \
239 NULL, fmt, ##args); \
241 #define DRM_LOG_MODE(fmt, args...) \
243 drm_ut_debug_printk(DRM_UT_MODE, NULL, \
244 NULL, fmt, ##args); \
246 #define DRM_LOG_DRIVER(fmt, args...) \
248 drm_ut_debug_printk(DRM_UT_DRIVER, NULL, \
249 NULL, fmt, ##args); \
252 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
253 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
254 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
255 #define DRM_DEBUG(fmt, arg...) do { } while (0)
256 #define DRM_LOG(fmt, arg...) do { } while (0)
257 #define DRM_LOG_KMS(fmt, args...) do { } while (0)
258 #define DRM_LOG_MODE(fmt, arg...) do { } while (0)
259 #define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
265 /***********************************************************************/
266 /** \name Internal types and structures */
269 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
271 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
274 * Test that the hardware lock is held by the caller, returning otherwise.
276 * \param dev DRM device.
277 * \param filp file pointer of the caller.
279 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
281 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
282 _file_priv->master->lock.file_priv != _file_priv) { \
283 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
284 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
285 _file_priv->master->lock.file_priv, _file_priv); \
291 * Ioctl function type.
293 * \param inode device inode.
294 * \param file_priv DRM file private pointer.
295 * \param cmd command.
296 * \param arg argument.
298 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
299 struct drm_file *file_priv);
301 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
304 #define DRM_IOCTL_NR(n) _IOC_NR(n)
305 #define DRM_MAJOR 226
308 #define DRM_MASTER 0x2
309 #define DRM_ROOT_ONLY 0x4
310 #define DRM_CONTROL_ALLOW 0x8
311 #define DRM_UNLOCKED 0x10
312 #define DRM_RENDER_ALLOW 0x20
314 struct drm_ioctl_desc {
318 unsigned int cmd_drv;
323 * Creates a driver or general drm_ioctl_desc array entry for the given
324 * ioctl, for use by drm_ioctl().
327 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
328 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
330 struct drm_magic_entry {
331 struct list_head head;
332 struct drm_hash_item hash_item;
333 struct drm_file *priv;
336 struct drm_vma_entry {
337 struct list_head head;
338 struct vm_area_struct *vma;
346 int idx; /**< Index into master buflist */
347 int total; /**< Buffer size */
348 int order; /**< log-base-2(total) */
349 int used; /**< Amount of buffer in use (for DMA) */
350 unsigned long offset; /**< Byte offset (used internally) */
351 void *address; /**< Address of buffer */
352 unsigned long bus_address; /**< Bus address of buffer */
353 struct drm_buf *next; /**< Kernel-only: used for free list */
354 __volatile__ int waiting; /**< On kernel DMA queue */
355 __volatile__ int pending; /**< On hardware DMA queue */
356 struct drm_file *file_priv; /**< Private of holding file descr */
357 int context; /**< Kernel queue for this buffer */
358 int while_locked; /**< Dispatch this buffer while locked */
366 } list; /**< Which list we're on */
368 int dev_priv_size; /**< Size of buffer private storage */
369 void *dev_private; /**< Per-buffer private storage */
372 /** bufs is one longer than it has to be */
373 struct drm_waitlist {
374 int count; /**< Number of possible buffers */
375 struct drm_buf **bufs; /**< List of pointers to buffers */
376 struct drm_buf **rp; /**< Read pointer */
377 struct drm_buf **wp; /**< Write pointer */
378 struct drm_buf **end; /**< End pointer */
379 spinlock_t read_lock;
380 spinlock_t write_lock;
383 struct drm_freelist {
384 int initialized; /**< Freelist in use */
385 atomic_t count; /**< Number of free buffers */
386 struct drm_buf *next; /**< End pointer */
388 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
389 int low_mark; /**< Low water mark */
390 int high_mark; /**< High water mark */
391 atomic_t wfh; /**< If waiting for high mark */
395 typedef struct drm_dma_handle {
402 * Buffer entry. There is one of this for each buffer size order.
404 struct drm_buf_entry {
405 int buf_size; /**< size */
406 int buf_count; /**< number of buffers */
407 struct drm_buf *buflist; /**< buffer list */
410 struct drm_dma_handle **seglist;
412 struct drm_freelist freelist;
415 /* Event queued up for userspace to read */
416 struct drm_pending_event {
417 struct drm_event *event;
418 struct list_head link;
419 struct drm_file *file_priv;
420 pid_t pid; /* pid of requester, no guarantee it's valid by the time
421 we deliver the event, for tracing only */
422 void (*destroy)(struct drm_pending_event *event);
425 /* initial implementaton using a linked list - todo hashtab */
426 struct drm_prime_file_private {
427 struct list_head head;
431 /** File private data */
433 unsigned always_authenticated :1;
434 unsigned authenticated :1;
435 unsigned is_master :1; /* this file private is a master for a minor */
436 /* true when the client has asked us to expose stereo 3D mode flags */
437 unsigned stereo_allowed :1;
442 unsigned long ioctl_count;
443 struct list_head lhead;
444 struct drm_minor *minor;
445 unsigned long lock_count;
447 /** Mapping of mm object handles to object pointers. */
448 struct idr object_idr;
449 /** Lock for synchronization of access to object_idr. */
450 spinlock_t table_lock;
455 struct drm_master *master; /* master this node is currently associated with
456 N.B. not always minor->master */
458 * fbs - List of framebuffers associated with this file.
460 * Protected by fbs_lock. Note that the fbs list holds a reference on
461 * the fb object to prevent it from untimely disappearing.
463 struct list_head fbs;
464 struct mutex fbs_lock;
466 wait_queue_head_t event_wait;
467 struct list_head event_list;
470 struct drm_prime_file_private prime;
475 atomic_t use_count; /**< Outstanding uses (+1) */
476 atomic_t finalization; /**< Finalization in progress */
477 atomic_t block_count; /**< Count of processes waiting */
478 atomic_t block_read; /**< Queue blocked for reads */
479 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
480 atomic_t block_write; /**< Queue blocked for writes */
481 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
482 atomic_t total_queued; /**< Total queued statistic */
483 atomic_t total_flushed; /**< Total flushes statistic */
484 atomic_t total_locks; /**< Total locks statistics */
485 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
486 struct drm_waitlist waitlist; /**< Pending buffers */
487 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
493 struct drm_lock_data {
494 struct drm_hw_lock *hw_lock; /**< Hardware lock */
495 /** Private of lock holder's file (NULL=kernel) */
496 struct drm_file *file_priv;
497 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
498 unsigned long lock_time; /**< Time of last lock in jiffies */
500 uint32_t kernel_waiters;
501 uint32_t user_waiters;
508 struct drm_device_dma {
510 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
511 int buf_count; /**< total number of buffers */
512 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
514 int page_count; /**< number of pages */
515 unsigned long *pagelist; /**< page list */
516 unsigned long byte_count;
518 _DRM_DMA_USE_AGP = 0x01,
519 _DRM_DMA_USE_SG = 0x02,
520 _DRM_DMA_USE_FB = 0x04,
521 _DRM_DMA_USE_PCI_RO = 0x08
527 * AGP memory entry. Stored as a doubly linked list.
530 unsigned long handle; /**< handle */
532 unsigned long bound; /**< address */
534 struct list_head head;
540 * \sa drm_agp_init() and drm_device::agp.
542 struct drm_agp_head {
543 DRM_AGP_KERN agp_info; /**< AGP device information */
544 struct list_head memory;
545 unsigned long mode; /**< AGP mode */
546 struct agp_bridge_data *bridge;
547 int enabled; /**< whether the AGP bus as been enabled */
548 int acquired; /**< whether the AGP device has been acquired */
551 int cant_use_aperture;
552 unsigned long page_mask;
556 * Scatter-gather memory.
559 unsigned long handle;
562 struct page **pagelist;
568 struct drm_hw_lock *lock;
573 * Kernel side of a mapping
575 struct drm_local_map {
576 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
577 unsigned long size; /**< Requested physical size (bytes) */
578 enum drm_map_type type; /**< Type of memory to map */
579 enum drm_map_flags flags; /**< Flags */
580 void *handle; /**< User-space: "Handle" to pass to mmap() */
581 /**< Kernel-space: kernel-virtual address */
582 int mtrr; /**< MTRR slot used */
585 typedef struct drm_local_map drm_local_map_t;
590 struct drm_map_list {
591 struct list_head head; /**< list head */
592 struct drm_hash_item hash;
593 struct drm_local_map *map; /**< mapping */
595 struct drm_master *master;
599 * Context handle list
601 struct drm_ctx_list {
602 struct list_head head; /**< list head */
603 drm_context_t handle; /**< context handle */
604 struct drm_file *tag; /**< associated fd private data */
607 /* location of GART table */
608 #define DRM_ATI_GART_MAIN 1
609 #define DRM_ATI_GART_FB 2
611 #define DRM_ATI_GART_PCI 1
612 #define DRM_ATI_GART_PCIE 2
613 #define DRM_ATI_GART_IGP 3
615 struct drm_ati_pcigart_info {
616 int gart_table_location;
620 dma_addr_t table_mask;
621 struct drm_dma_handle *table_handle;
622 struct drm_local_map mapping;
627 * GEM specific mm private for tracking GEM objects
630 struct drm_vma_offset_manager vma_manager;
634 * This structure defines the drm_mm memory object, which will be used by the
635 * DRM for its buffer objects.
637 struct drm_gem_object {
638 /** Reference count of this object */
639 struct kref refcount;
642 * handle_count - gem file_priv handle count of this object
644 * Each handle also holds a reference. Note that when the handle_count
645 * drops to 0 any global names (e.g. the id in the flink namespace) will
648 * Protected by dev->object_name_lock.
650 unsigned handle_count;
652 /** Related drm device */
653 struct drm_device *dev;
655 /** File representing the shmem storage */
658 /* Mapping info for this object */
659 struct drm_vma_offset_node vma_node;
662 * Size of the object, in bytes. Immutable over the object's
668 * Global name for this object, starts at 1. 0 means unnamed.
669 * Access is covered by the object_name_lock in the related drm_device
674 * Memory domains. These monitor which caches contain read/write data
675 * related to the object. When transitioning from one set of domains
676 * to another, the driver is called to ensure that caches are suitably
677 * flushed and invalidated
679 uint32_t read_domains;
680 uint32_t write_domain;
683 * While validating an exec operation, the
684 * new read/write domain values are computed here.
685 * They will be transferred to the above values
686 * at the point that any cache flushing occurs
688 uint32_t pending_read_domains;
689 uint32_t pending_write_domain;
692 * dma_buf - dma buf associated with this GEM object
694 * Pointer to the dma-buf associated with this gem object (either
695 * through importing or exporting). We break the resulting reference
696 * loop when the last gem handle for this object is released.
698 * Protected by obj->object_name_lock
700 struct dma_buf *dma_buf;
703 * import_attach - dma buf attachment backing this object
705 * Any foreign dma_buf imported as a gem object has this set to the
706 * attachment point for the device. This is invariant over the lifetime
709 * The driver's ->gem_free_object callback is responsible for cleaning
710 * up the dma_buf attachment and references acquired at import time.
712 * Note that the drm gem/prime core does not depend upon drivers setting
713 * this field any more. So for drivers where this doesn't make sense
714 * (e.g. virtual devices or a displaylink behind an usb bus) they can
715 * simply leave it as NULL.
717 struct dma_buf_attachment *import_attach;
720 #include <drm/drm_crtc.h>
722 /* per-master structure */
725 struct kref refcount; /* refcount for this master */
727 struct list_head head; /**< each minor contains a list of masters */
728 struct drm_minor *minor; /**< link back to minor we are a master for */
730 char *unique; /**< Unique identifier: e.g., busid */
731 int unique_len; /**< Length of unique field */
732 int unique_size; /**< amount allocated */
734 int blocked; /**< Blocked due to VC switch? */
736 /** \name Authentication */
738 struct drm_open_hash magiclist;
739 struct list_head magicfree;
742 struct drm_lock_data lock; /**< Information on hardware lock */
744 void *driver_priv; /**< Private structure for driver to use */
747 /* Size of ringbuffer for vblank timestamps. Just double-buffer
748 * in initial implementation.
750 #define DRM_VBLANKTIME_RBSIZE 2
752 /* Flags and return codes for get_vblank_timestamp() driver function. */
753 #define DRM_CALLED_FROM_VBLIRQ 1
754 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
755 #define DRM_VBLANKTIME_INVBL (1 << 1)
757 /* get_scanout_position() return flags */
758 #define DRM_SCANOUTPOS_VALID (1 << 0)
759 #define DRM_SCANOUTPOS_INVBL (1 << 1)
760 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
764 int (*get_irq)(struct drm_device *dev);
765 const char *(*get_name)(struct drm_device *dev);
766 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
767 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
768 struct drm_unique *unique);
769 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
770 /* hooks that are for PCI */
771 int (*agp_init)(struct drm_device *dev);
772 void (*agp_destroy)(struct drm_device *dev);
777 * DRM driver structure. This structure represent the common code for
778 * a family of cards. There will one drm_device for each card present
782 int (*load) (struct drm_device *, unsigned long flags);
783 int (*firstopen) (struct drm_device *);
784 int (*open) (struct drm_device *, struct drm_file *);
785 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
786 void (*postclose) (struct drm_device *, struct drm_file *);
787 void (*lastclose) (struct drm_device *);
788 int (*unload) (struct drm_device *);
789 int (*suspend) (struct drm_device *, pm_message_t state);
790 int (*resume) (struct drm_device *);
791 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
792 int (*dma_quiescent) (struct drm_device *);
793 int (*context_dtor) (struct drm_device *dev, int context);
796 * get_vblank_counter - get raw hardware vblank counter
798 * @crtc: counter to fetch
800 * Driver callback for fetching a raw hardware vblank counter for @crtc.
801 * If a device doesn't have a hardware counter, the driver can simply
802 * return the value of drm_vblank_count. The DRM core will account for
803 * missed vblank events while interrupts where disabled based on system
806 * Wraparound handling and loss of events due to modesetting is dealt
807 * with in the DRM core code.
810 * Raw vblank counter value.
812 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
815 * enable_vblank - enable vblank interrupt events
817 * @crtc: which irq to enable
819 * Enable vblank interrupts for @crtc. If the device doesn't have
820 * a hardware vblank counter, this routine should be a no-op, since
821 * interrupts will have to stay on to keep the count accurate.
824 * Zero on success, appropriate errno if the given @crtc's vblank
825 * interrupt cannot be enabled.
827 int (*enable_vblank) (struct drm_device *dev, int crtc);
830 * disable_vblank - disable vblank interrupt events
832 * @crtc: which irq to enable
834 * Disable vblank interrupts for @crtc. If the device doesn't have
835 * a hardware vblank counter, this routine should be a no-op, since
836 * interrupts will have to stay on to keep the count accurate.
838 void (*disable_vblank) (struct drm_device *dev, int crtc);
841 * Called by \c drm_device_is_agp. Typically used to determine if a
842 * card is really attached to AGP or not.
844 * \param dev DRM device handle
847 * One of three values is returned depending on whether or not the
848 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
849 * (return of 1), or may or may not be AGP (return of 2).
851 int (*device_is_agp) (struct drm_device *dev);
854 * Called by vblank timestamping code.
856 * Return the current display scanout position from a crtc, and an
857 * optional accurate ktime_get timestamp of when position was measured.
859 * \param dev DRM device.
860 * \param crtc Id of the crtc to query.
861 * \param *vpos Target location for current vertical scanout position.
862 * \param *hpos Target location for current horizontal scanout position.
863 * \param *stime Target location for timestamp taken immediately before
864 * scanout position query. Can be NULL to skip timestamp.
865 * \param *etime Target location for timestamp taken immediately after
866 * scanout position query. Can be NULL to skip timestamp.
868 * Returns vpos as a positive number while in active scanout area.
869 * Returns vpos as a negative number inside vblank, counting the number
870 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
871 * until start of active scanout / end of vblank."
873 * \return Flags, or'ed together as follows:
875 * DRM_SCANOUTPOS_VALID = Query successful.
876 * DRM_SCANOUTPOS_INVBL = Inside vblank.
877 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
878 * this flag means that returned position may be offset by a constant
879 * but unknown small number of scanlines wrt. real scanout position.
882 int (*get_scanout_position) (struct drm_device *dev, int crtc,
883 int *vpos, int *hpos, ktime_t *stime,
887 * Called by \c drm_get_last_vbltimestamp. Should return a precise
888 * timestamp when the most recent VBLANK interval ended or will end.
890 * Specifically, the timestamp in @vblank_time should correspond as
891 * closely as possible to the time when the first video scanline of
892 * the video frame after the end of VBLANK will start scanning out,
893 * the time immediately after end of the VBLANK interval. If the
894 * @crtc is currently inside VBLANK, this will be a time in the future.
895 * If the @crtc is currently scanning out a frame, this will be the
896 * past start time of the current scanout. This is meant to adhere
897 * to the OpenML OML_sync_control extension specification.
899 * \param dev dev DRM device handle.
900 * \param crtc crtc for which timestamp should be returned.
901 * \param *max_error Maximum allowable timestamp error in nanoseconds.
902 * Implementation should strive to provide timestamp
903 * with an error of at most *max_error nanoseconds.
904 * Returns true upper bound on error for timestamp.
905 * \param *vblank_time Target location for returned vblank timestamp.
906 * \param flags 0 = Defaults, no special treatment needed.
907 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
908 * irq handler. Some drivers need to apply some workarounds
909 * for gpu-specific vblank irq quirks if flag is set.
912 * Zero if timestamping isn't supported in current display mode or a
913 * negative number on failure. A positive status code on success,
914 * which describes how the vblank_time timestamp was computed.
916 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
918 struct timeval *vblank_time,
921 /* these have to be filled in */
923 irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
924 void (*irq_preinstall) (struct drm_device *dev);
925 int (*irq_postinstall) (struct drm_device *dev);
926 void (*irq_uninstall) (struct drm_device *dev);
928 /* Master routines */
929 int (*master_create)(struct drm_device *dev, struct drm_master *master);
930 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
932 * master_set is called whenever the minor master is set.
933 * master_drop is called whenever the minor master is dropped.
936 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
938 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
941 int (*debugfs_init)(struct drm_minor *minor);
942 void (*debugfs_cleanup)(struct drm_minor *minor);
945 * Driver-specific constructor for drm_gem_objects, to set up
946 * obj->driver_private.
948 * Returns 0 on success.
950 void (*gem_free_object) (struct drm_gem_object *obj);
951 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
952 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
955 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
956 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
957 uint32_t handle, uint32_t flags, int *prime_fd);
958 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
959 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
960 int prime_fd, uint32_t *handle);
961 /* export GEM -> dmabuf */
962 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
963 struct drm_gem_object *obj, int flags);
964 /* import dmabuf -> GEM */
965 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
966 struct dma_buf *dma_buf);
967 /* low-level interface used by drm_gem_prime_{import,export} */
968 int (*gem_prime_pin)(struct drm_gem_object *obj);
969 void (*gem_prime_unpin)(struct drm_gem_object *obj);
970 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
971 struct drm_gem_object *(*gem_prime_import_sg_table)(
972 struct drm_device *dev, size_t size,
973 struct sg_table *sgt);
974 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
975 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
976 int (*gem_prime_mmap)(struct drm_gem_object *obj,
977 struct vm_area_struct *vma);
979 /* vga arb irq handler */
980 void (*vgaarb_irq)(struct drm_device *dev, bool state);
982 /* dumb alloc support */
983 int (*dumb_create)(struct drm_file *file_priv,
984 struct drm_device *dev,
985 struct drm_mode_create_dumb *args);
986 int (*dumb_map_offset)(struct drm_file *file_priv,
987 struct drm_device *dev, uint32_t handle,
989 int (*dumb_destroy)(struct drm_file *file_priv,
990 struct drm_device *dev,
993 /* Driver private ops for this object */
994 const struct vm_operations_struct *gem_vm_ops;
1003 u32 driver_features;
1005 const struct drm_ioctl_desc *ioctls;
1007 const struct file_operations *fops;
1009 struct pci_driver *pci;
1010 struct platform_device *platform_device;
1011 struct usb_driver *usb;
1013 struct drm_bus *bus;
1015 /* List of devices hanging off this driver with stealth attach. */
1016 struct list_head legacy_dev_list;
1019 #define DRM_MINOR_UNASSIGNED 0
1020 #define DRM_MINOR_LEGACY 1
1021 #define DRM_MINOR_CONTROL 2
1022 #define DRM_MINOR_RENDER 3
1025 * Info file list entry. This structure represents a debugfs or proc file to
1026 * be created by the drm core
1028 struct drm_info_list {
1029 const char *name; /** file name */
1030 int (*show)(struct seq_file*, void*); /** show callback */
1031 u32 driver_features; /**< Required driver features for this entry */
1036 * debugfs node structure. This structure represents a debugfs file.
1038 struct drm_info_node {
1039 struct list_head list;
1040 struct drm_minor *minor;
1041 const struct drm_info_list *info_ent;
1042 struct dentry *dent;
1046 * DRM minor structure. This structure represents a drm minor number.
1049 int index; /**< Minor device number */
1050 int type; /**< Control or render */
1051 dev_t device; /**< Device number for mknod */
1052 struct device *kdev; /**< Linux device */
1053 struct drm_device *dev;
1055 struct dentry *debugfs_root;
1057 struct list_head debugfs_list;
1058 struct mutex debugfs_lock; /* Protects debugfs_list. */
1060 struct drm_master *master; /* currently active master for this node */
1061 struct list_head master_list;
1062 struct drm_mode_group mode_group;
1065 /* mode specified on the command line */
1066 struct drm_cmdline_mode {
1068 bool refresh_specified;
1077 enum drm_connector_force force;
1081 struct drm_pending_vblank_event {
1082 struct drm_pending_event base;
1084 struct drm_event_vblank event;
1087 struct drm_vblank_crtc {
1088 wait_queue_head_t queue; /**< VBLANK wait queue */
1089 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1090 atomic_t count; /**< number of VBLANK interrupts */
1091 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1092 u32 last; /* protected by dev->vbl_lock, used */
1093 /* for wraparound handling */
1094 u32 last_wait; /* Last vblank seqno waited per CRTC */
1095 unsigned int inmodeset; /* Display driver is setting mode */
1096 bool enabled; /* so we don't call enable more than
1101 * DRM device structure. This structure represent a complete card that
1102 * may contain multiple heads.
1105 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1106 char *devname; /**< For /proc/interrupts */
1107 int if_version; /**< Highest interface version set */
1111 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1112 struct mutex struct_mutex; /**< For others */
1115 /** \name Usage Counters */
1117 int open_count; /**< Outstanding files open */
1118 atomic_t ioctl_count; /**< Outstanding IOCTLs pending */
1119 atomic_t vma_count; /**< Outstanding vma areas open */
1120 int buf_use; /**< Buffers in use -- cannot alloc */
1121 atomic_t buf_alloc; /**< Buffer allocation in progress */
1124 struct list_head filelist;
1126 /** \name Memory management */
1128 struct list_head maplist; /**< Linked list of regions */
1129 struct drm_open_hash map_hash; /**< User token hash table for maps */
1131 /** \name Context handle management */
1133 struct list_head ctxlist; /**< Linked list of context handles */
1134 struct mutex ctxlist_mutex; /**< For ctxlist */
1138 struct list_head vmalist; /**< List of vmas (for debugging) */
1142 /** \name DMA support */
1144 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1147 /** \name Context support */
1149 bool irq_enabled; /**< True if irq handler is enabled */
1150 __volatile__ long context_flag; /**< Context swapping flag */
1151 int last_context; /**< Last current context */
1154 /** \name VBLANK IRQ support */
1158 * At load time, disabling the vblank interrupt won't be allowed since
1159 * old clients may not call the modeset ioctl and therefore misbehave.
1160 * Once the modeset ioctl *has* been called though, we can safely
1161 * disable them when unused.
1163 bool vblank_disable_allowed;
1165 /* array of size num_crtcs */
1166 struct drm_vblank_crtc *vblank;
1168 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1169 spinlock_t vbl_lock;
1170 struct timer_list vblank_disable_timer;
1172 u32 max_vblank_count; /**< size of vblank counter register */
1177 struct list_head vblank_event_list;
1178 spinlock_t event_lock;
1182 struct drm_agp_head *agp; /**< AGP data */
1184 struct device *dev; /**< Device structure */
1185 struct pci_dev *pdev; /**< PCI device structure */
1187 struct pci_controller *hose;
1190 struct platform_device *platformdev; /**< Platform device struture */
1191 struct usb_device *usbdev;
1193 struct drm_sg_mem *sg; /**< Scatter gather memory */
1194 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1195 void *dev_private; /**< device private data */
1197 struct address_space *dev_mapping;
1198 struct drm_sigdata sigdata; /**< For block_all_signals */
1201 struct drm_driver *driver;
1202 struct drm_local_map *agp_buffer_map;
1203 unsigned int agp_buffer_token;
1204 struct drm_minor *control; /**< Control node for card */
1205 struct drm_minor *primary; /**< render type primary screen head */
1206 struct drm_minor *render; /**< render node for card */
1208 struct drm_mode_config mode_config; /**< Current mode config */
1210 /** \name GEM information */
1212 struct mutex object_name_lock;
1213 struct idr object_name_idr;
1215 int switch_power_state;
1217 atomic_t unplugged; /* device has been unplugged or gone away */
1220 #define DRM_SWITCH_POWER_ON 0
1221 #define DRM_SWITCH_POWER_OFF 1
1222 #define DRM_SWITCH_POWER_CHANGING 2
1223 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1225 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1228 return ((dev->driver->driver_features & feature) ? 1 : 0);
1231 static inline int drm_dev_to_irq(struct drm_device *dev)
1233 return dev->driver->bus->get_irq(dev);
1236 static inline void drm_device_set_unplugged(struct drm_device *dev)
1239 atomic_set(&dev->unplugged, 1);
1242 static inline int drm_device_is_unplugged(struct drm_device *dev)
1244 int ret = atomic_read(&dev->unplugged);
1249 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1251 return mutex_is_locked(&dev->mode_config.mutex);
1254 static inline bool drm_is_render_client(struct drm_file *file_priv)
1256 return file_priv->minor->type == DRM_MINOR_RENDER;
1259 /******************************************************************/
1260 /** \name Internal function definitions */
1263 /* Driver support (drm_drv.h) */
1264 extern long drm_ioctl(struct file *filp,
1265 unsigned int cmd, unsigned long arg);
1266 extern long drm_compat_ioctl(struct file *filp,
1267 unsigned int cmd, unsigned long arg);
1268 extern int drm_lastclose(struct drm_device *dev);
1270 /* Device support (drm_fops.h) */
1271 extern struct mutex drm_global_mutex;
1272 extern int drm_open(struct inode *inode, struct file *filp);
1273 extern int drm_stub_open(struct inode *inode, struct file *filp);
1274 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1275 size_t count, loff_t *offset);
1276 extern int drm_release(struct inode *inode, struct file *filp);
1278 /* Mapping support (drm_vm.h) */
1279 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1280 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1281 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1282 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1283 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1285 /* Memory management support (drm_memory.h) */
1286 #include <drm/drm_memory.h>
1288 /* Misc. IOCTL support (drm_ioctl.h) */
1289 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1290 struct drm_file *file_priv);
1291 extern int drm_getunique(struct drm_device *dev, void *data,
1292 struct drm_file *file_priv);
1293 extern int drm_setunique(struct drm_device *dev, void *data,
1294 struct drm_file *file_priv);
1295 extern int drm_getmap(struct drm_device *dev, void *data,
1296 struct drm_file *file_priv);
1297 extern int drm_getclient(struct drm_device *dev, void *data,
1298 struct drm_file *file_priv);
1299 extern int drm_getstats(struct drm_device *dev, void *data,
1300 struct drm_file *file_priv);
1301 extern int drm_getcap(struct drm_device *dev, void *data,
1302 struct drm_file *file_priv);
1303 extern int drm_setclientcap(struct drm_device *dev, void *data,
1304 struct drm_file *file_priv);
1305 extern int drm_setversion(struct drm_device *dev, void *data,
1306 struct drm_file *file_priv);
1307 extern int drm_noop(struct drm_device *dev, void *data,
1308 struct drm_file *file_priv);
1310 /* Context IOCTL support (drm_context.h) */
1311 extern int drm_resctx(struct drm_device *dev, void *data,
1312 struct drm_file *file_priv);
1313 extern int drm_addctx(struct drm_device *dev, void *data,
1314 struct drm_file *file_priv);
1315 extern int drm_getctx(struct drm_device *dev, void *data,
1316 struct drm_file *file_priv);
1317 extern int drm_switchctx(struct drm_device *dev, void *data,
1318 struct drm_file *file_priv);
1319 extern int drm_newctx(struct drm_device *dev, void *data,
1320 struct drm_file *file_priv);
1321 extern int drm_rmctx(struct drm_device *dev, void *data,
1322 struct drm_file *file_priv);
1324 extern int drm_ctxbitmap_init(struct drm_device *dev);
1325 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1326 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1328 extern int drm_setsareactx(struct drm_device *dev, void *data,
1329 struct drm_file *file_priv);
1330 extern int drm_getsareactx(struct drm_device *dev, void *data,
1331 struct drm_file *file_priv);
1333 /* Authentication IOCTL support (drm_auth.h) */
1334 extern int drm_getmagic(struct drm_device *dev, void *data,
1335 struct drm_file *file_priv);
1336 extern int drm_authmagic(struct drm_device *dev, void *data,
1337 struct drm_file *file_priv);
1338 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1340 /* Cache management (drm_cache.c) */
1341 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1342 void drm_clflush_sg(struct sg_table *st);
1343 void drm_clflush_virt_range(char *addr, unsigned long length);
1345 /* Locking IOCTL support (drm_lock.h) */
1346 extern int drm_lock(struct drm_device *dev, void *data,
1347 struct drm_file *file_priv);
1348 extern int drm_unlock(struct drm_device *dev, void *data,
1349 struct drm_file *file_priv);
1350 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1351 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1352 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1355 * These are exported to drivers so that they can implement fencing using
1356 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1359 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1361 /* Buffer management support (drm_bufs.h) */
1362 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1363 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1364 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1365 unsigned int size, enum drm_map_type type,
1366 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1367 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1368 struct drm_file *file_priv);
1369 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1370 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1371 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1372 struct drm_file *file_priv);
1373 extern int drm_addbufs(struct drm_device *dev, void *data,
1374 struct drm_file *file_priv);
1375 extern int drm_infobufs(struct drm_device *dev, void *data,
1376 struct drm_file *file_priv);
1377 extern int drm_markbufs(struct drm_device *dev, void *data,
1378 struct drm_file *file_priv);
1379 extern int drm_freebufs(struct drm_device *dev, void *data,
1380 struct drm_file *file_priv);
1381 extern int drm_mapbufs(struct drm_device *dev, void *data,
1382 struct drm_file *file_priv);
1383 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1384 struct drm_file *file_priv);
1386 /* DMA support (drm_dma.h) */
1387 extern int drm_legacy_dma_setup(struct drm_device *dev);
1388 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1389 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1390 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1391 struct drm_file *filp);
1393 /* IRQ support (drm_irq.h) */
1394 extern int drm_control(struct drm_device *dev, void *data,
1395 struct drm_file *file_priv);
1396 extern int drm_irq_install(struct drm_device *dev);
1397 extern int drm_irq_uninstall(struct drm_device *dev);
1399 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1400 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1401 struct drm_file *filp);
1402 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1403 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1404 struct timeval *vblanktime);
1405 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1406 struct drm_pending_vblank_event *e);
1407 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1408 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1409 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1410 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1411 extern void drm_vblank_cleanup(struct drm_device *dev);
1412 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1413 struct timeval *tvblank, unsigned flags);
1414 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1415 int crtc, int *max_error,
1416 struct timeval *vblank_time,
1418 struct drm_crtc *refcrtc);
1419 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);
1422 drm_mode_parse_command_line_for_connector(const char *mode_option,
1423 struct drm_connector *connector,
1424 struct drm_cmdline_mode *mode);
1426 extern struct drm_display_mode *
1427 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1428 struct drm_cmdline_mode *cmd);
1430 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1431 struct drm_display_mode *dmode);
1432 extern int of_get_drm_display_mode(struct device_node *np,
1433 struct drm_display_mode *dmode,
1436 /* Modesetting support */
1437 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1438 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1439 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1440 struct drm_file *file_priv);
1442 /* AGP/GART support (drm_agpsupport.h) */
1444 #include <drm/drm_agpsupport.h>
1446 /* Stub support (drm_stub.h) */
1447 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1448 struct drm_file *file_priv);
1449 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1450 struct drm_file *file_priv);
1451 struct drm_master *drm_master_create(struct drm_minor *minor);
1452 extern struct drm_master *drm_master_get(struct drm_master *master);
1453 extern void drm_master_put(struct drm_master **master);
1455 extern void drm_put_dev(struct drm_device *dev);
1456 extern void drm_unplug_dev(struct drm_device *dev);
1457 extern unsigned int drm_debug;
1458 extern unsigned int drm_rnodes;
1460 extern unsigned int drm_vblank_offdelay;
1461 extern unsigned int drm_timestamp_precision;
1462 extern unsigned int drm_timestamp_monotonic;
1464 extern struct class *drm_class;
1465 extern struct dentry *drm_debugfs_root;
1467 extern struct idr drm_minors_idr;
1469 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1471 /* Debugfs support */
1472 #if defined(CONFIG_DEBUG_FS)
1473 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1474 struct dentry *root);
1475 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1476 int count, struct dentry *root,
1477 struct drm_minor *minor);
1478 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1479 int count, struct drm_minor *minor);
1480 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1482 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1483 struct dentry *root)
1488 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1489 int count, struct dentry *root,
1490 struct drm_minor *minor)
1495 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1496 int count, struct drm_minor *minor)
1501 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1507 /* Info file support */
1508 extern int drm_name_info(struct seq_file *m, void *data);
1509 extern int drm_vm_info(struct seq_file *m, void *data);
1510 extern int drm_bufs_info(struct seq_file *m, void *data);
1511 extern int drm_vblank_info(struct seq_file *m, void *data);
1512 extern int drm_clients_info(struct seq_file *m, void* data);
1513 extern int drm_gem_name_info(struct seq_file *m, void *data);
1516 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1517 struct drm_gem_object *obj, int flags);
1518 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1519 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1521 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1522 struct dma_buf *dma_buf);
1523 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1524 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1525 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1527 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1528 struct drm_file *file_priv);
1529 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1530 struct drm_file *file_priv);
1532 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1533 dma_addr_t *addrs, int max_pages);
1534 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1535 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1537 int drm_gem_dumb_destroy(struct drm_file *file,
1538 struct drm_device *dev,
1541 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1542 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1543 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1546 extern int drm_vma_info(struct seq_file *m, void *data);
1549 /* Scatter Gather Support (drm_scatter.h) */
1550 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1551 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1552 struct drm_file *file_priv);
1553 extern int drm_sg_free(struct drm_device *dev, void *data,
1554 struct drm_file *file_priv);
1556 /* ATI PCIGART support (ati_pcigart.h) */
1557 extern int drm_ati_pcigart_init(struct drm_device *dev,
1558 struct drm_ati_pcigart_info * gart_info);
1559 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1560 struct drm_ati_pcigart_info * gart_info);
1562 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1564 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1565 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1567 /* sysfs support (drm_sysfs.c) */
1568 struct drm_sysfs_class;
1569 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1570 extern void drm_sysfs_destroy(void);
1571 extern int drm_sysfs_device_add(struct drm_minor *minor);
1572 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1573 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1574 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1575 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1577 /* Graphics Execution Manager library functions (drm_gem.c) */
1578 int drm_gem_init(struct drm_device *dev);
1579 void drm_gem_destroy(struct drm_device *dev);
1580 void drm_gem_object_release(struct drm_gem_object *obj);
1581 void drm_gem_object_free(struct kref *kref);
1582 int drm_gem_object_init(struct drm_device *dev,
1583 struct drm_gem_object *obj, size_t size);
1584 void drm_gem_private_object_init(struct drm_device *dev,
1585 struct drm_gem_object *obj, size_t size);
1586 void drm_gem_vm_open(struct vm_area_struct *vma);
1587 void drm_gem_vm_close(struct vm_area_struct *vma);
1588 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1589 struct vm_area_struct *vma);
1590 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1592 #include <drm/drm_global.h>
1595 drm_gem_object_reference(struct drm_gem_object *obj)
1597 kref_get(&obj->refcount);
1601 drm_gem_object_unreference(struct drm_gem_object *obj)
1604 kref_put(&obj->refcount, drm_gem_object_free);
1608 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1610 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1611 struct drm_device *dev = obj->dev;
1613 mutex_lock(&dev->struct_mutex);
1614 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1615 drm_gem_object_free(&obj->refcount);
1616 mutex_unlock(&dev->struct_mutex);
1620 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1621 struct drm_gem_object *obj,
1623 int drm_gem_handle_create(struct drm_file *file_priv,
1624 struct drm_gem_object *obj,
1626 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1629 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1630 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1631 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1633 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1634 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1635 bool dirty, bool accessed);
1637 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1638 struct drm_file *filp,
1640 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1641 struct drm_file *file_priv);
1642 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1643 struct drm_file *file_priv);
1644 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1645 struct drm_file *file_priv);
1646 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1647 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1649 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1650 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1651 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1653 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1656 struct drm_map_list *_entry;
1657 list_for_each_entry(_entry, &dev->maplist, head)
1658 if (_entry->user_token == token)
1663 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1667 #include <drm/drm_mem_util.h>
1669 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1670 struct device *parent);
1671 void drm_dev_free(struct drm_device *dev);
1672 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1673 void drm_dev_unregister(struct drm_device *dev);
1677 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1679 if (dev->driver->device_is_agp != NULL) {
1680 int err = (*dev->driver->device_is_agp) (dev);
1687 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1690 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1691 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1692 extern int drm_get_pci_dev(struct pci_dev *pdev,
1693 const struct pci_device_id *ent,
1694 struct drm_driver *driver);
1696 #define DRM_PCIE_SPEED_25 1
1697 #define DRM_PCIE_SPEED_50 2
1698 #define DRM_PCIE_SPEED_80 4
1700 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1702 /* platform section */
1703 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1705 /* returns true if currently okay to sleep */
1706 static __inline__ bool drm_can_sleep(void)
1708 if (in_atomic() || in_dbg_master() || irqs_disabled())
1713 #endif /* __KERNEL__ */