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_PCI_DMA 0x8
141 #define DRIVER_SG 0x10
142 #define DRIVER_HAVE_DMA 0x20
143 #define DRIVER_HAVE_IRQ 0x40
144 #define DRIVER_IRQ_SHARED 0x80
145 #define DRIVER_GEM 0x1000
146 #define DRIVER_MODESET 0x2000
147 #define DRIVER_PRIME 0x4000
148 #define DRIVER_RENDER 0x8000
150 #define DRIVER_BUS_PCI 0x1
151 #define DRIVER_BUS_PLATFORM 0x2
152 #define DRIVER_BUS_USB 0x3
153 #define DRIVER_BUS_HOST1X 0x4
155 /***********************************************************************/
156 /** \name Begin the DRM... */
159 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
160 also include looping detection. */
162 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
163 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
164 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
166 #define DRM_MAP_HASH_OFFSET 0x10000000
170 /***********************************************************************/
171 /** \name Macros to make printk easier */
177 * \param fmt printf() like format string.
178 * \param arg arguments
180 #define DRM_ERROR(fmt, ...) \
181 drm_err(__func__, fmt, ##__VA_ARGS__)
184 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
186 * \param fmt printf() like format string.
187 * \param arg arguments
189 #define DRM_ERROR_RATELIMITED(fmt, ...) \
191 static DEFINE_RATELIMIT_STATE(_rs, \
192 DEFAULT_RATELIMIT_INTERVAL, \
193 DEFAULT_RATELIMIT_BURST); \
195 if (__ratelimit(&_rs)) \
196 drm_err(__func__, fmt, ##__VA_ARGS__); \
199 #define DRM_INFO(fmt, ...) \
200 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
205 * \param fmt printf() like format string.
206 * \param arg arguments
209 #define DRM_DEBUG(fmt, args...) \
211 drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, \
212 __func__, fmt, ##args); \
215 #define DRM_DEBUG_DRIVER(fmt, args...) \
217 drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME, \
218 __func__, fmt, ##args); \
220 #define DRM_DEBUG_KMS(fmt, args...) \
222 drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
223 __func__, fmt, ##args); \
225 #define DRM_DEBUG_PRIME(fmt, args...) \
227 drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
228 __func__, fmt, ##args); \
230 #define DRM_LOG(fmt, args...) \
232 drm_ut_debug_printk(DRM_UT_CORE, NULL, \
233 NULL, fmt, ##args); \
235 #define DRM_LOG_KMS(fmt, args...) \
237 drm_ut_debug_printk(DRM_UT_KMS, NULL, \
238 NULL, fmt, ##args); \
240 #define DRM_LOG_MODE(fmt, args...) \
242 drm_ut_debug_printk(DRM_UT_MODE, NULL, \
243 NULL, fmt, ##args); \
245 #define DRM_LOG_DRIVER(fmt, args...) \
247 drm_ut_debug_printk(DRM_UT_DRIVER, NULL, \
248 NULL, fmt, ##args); \
251 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
252 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
253 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
254 #define DRM_DEBUG(fmt, arg...) do { } while (0)
255 #define DRM_LOG(fmt, arg...) do { } while (0)
256 #define DRM_LOG_KMS(fmt, args...) do { } while (0)
257 #define DRM_LOG_MODE(fmt, arg...) do { } while (0)
258 #define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
264 /***********************************************************************/
265 /** \name Internal types and structures */
268 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
270 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
273 * Test that the hardware lock is held by the caller, returning otherwise.
275 * \param dev DRM device.
276 * \param filp file pointer of the caller.
278 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
280 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
281 _file_priv->master->lock.file_priv != _file_priv) { \
282 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
283 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
284 _file_priv->master->lock.file_priv, _file_priv); \
290 * Ioctl function type.
292 * \param inode device inode.
293 * \param file_priv DRM file private pointer.
294 * \param cmd command.
295 * \param arg argument.
297 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
298 struct drm_file *file_priv);
300 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
303 #define DRM_IOCTL_NR(n) _IOC_NR(n)
304 #define DRM_MAJOR 226
307 #define DRM_MASTER 0x2
308 #define DRM_ROOT_ONLY 0x4
309 #define DRM_CONTROL_ALLOW 0x8
310 #define DRM_UNLOCKED 0x10
311 #define DRM_RENDER_ALLOW 0x20
313 struct drm_ioctl_desc {
317 unsigned int cmd_drv;
322 * Creates a driver or general drm_ioctl_desc array entry for the given
323 * ioctl, for use by drm_ioctl().
326 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
327 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
329 struct drm_magic_entry {
330 struct list_head head;
331 struct drm_hash_item hash_item;
332 struct drm_file *priv;
335 struct drm_vma_entry {
336 struct list_head head;
337 struct vm_area_struct *vma;
345 int idx; /**< Index into master buflist */
346 int total; /**< Buffer size */
347 int order; /**< log-base-2(total) */
348 int used; /**< Amount of buffer in use (for DMA) */
349 unsigned long offset; /**< Byte offset (used internally) */
350 void *address; /**< Address of buffer */
351 unsigned long bus_address; /**< Bus address of buffer */
352 struct drm_buf *next; /**< Kernel-only: used for free list */
353 __volatile__ int waiting; /**< On kernel DMA queue */
354 __volatile__ int pending; /**< On hardware DMA queue */
355 struct drm_file *file_priv; /**< Private of holding file descr */
356 int context; /**< Kernel queue for this buffer */
357 int while_locked; /**< Dispatch this buffer while locked */
365 } list; /**< Which list we're on */
367 int dev_priv_size; /**< Size of buffer private storage */
368 void *dev_private; /**< Per-buffer private storage */
371 /** bufs is one longer than it has to be */
372 struct drm_waitlist {
373 int count; /**< Number of possible buffers */
374 struct drm_buf **bufs; /**< List of pointers to buffers */
375 struct drm_buf **rp; /**< Read pointer */
376 struct drm_buf **wp; /**< Write pointer */
377 struct drm_buf **end; /**< End pointer */
378 spinlock_t read_lock;
379 spinlock_t write_lock;
382 struct drm_freelist {
383 int initialized; /**< Freelist in use */
384 atomic_t count; /**< Number of free buffers */
385 struct drm_buf *next; /**< End pointer */
387 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
388 int low_mark; /**< Low water mark */
389 int high_mark; /**< High water mark */
390 atomic_t wfh; /**< If waiting for high mark */
394 typedef struct drm_dma_handle {
401 * Buffer entry. There is one of this for each buffer size order.
403 struct drm_buf_entry {
404 int buf_size; /**< size */
405 int buf_count; /**< number of buffers */
406 struct drm_buf *buflist; /**< buffer list */
409 struct drm_dma_handle **seglist;
411 struct drm_freelist freelist;
414 /* Event queued up for userspace to read */
415 struct drm_pending_event {
416 struct drm_event *event;
417 struct list_head link;
418 struct drm_file *file_priv;
419 pid_t pid; /* pid of requester, no guarantee it's valid by the time
420 we deliver the event, for tracing only */
421 void (*destroy)(struct drm_pending_event *event);
424 /* initial implementaton using a linked list - todo hashtab */
425 struct drm_prime_file_private {
426 struct list_head head;
430 /** File private data */
432 unsigned always_authenticated :1;
433 unsigned authenticated :1;
434 unsigned is_master :1; /* this file private is a master for a minor */
435 /* true when the client has asked us to expose stereo 3D mode flags */
436 unsigned stereo_allowed :1;
441 unsigned long ioctl_count;
442 struct list_head lhead;
443 struct drm_minor *minor;
444 unsigned long lock_count;
446 /** Mapping of mm object handles to object pointers. */
447 struct idr object_idr;
448 /** Lock for synchronization of access to object_idr. */
449 spinlock_t table_lock;
454 struct drm_master *master; /* master this node is currently associated with
455 N.B. not always minor->master */
457 * fbs - List of framebuffers associated with this file.
459 * Protected by fbs_lock. Note that the fbs list holds a reference on
460 * the fb object to prevent it from untimely disappearing.
462 struct list_head fbs;
463 struct mutex fbs_lock;
465 wait_queue_head_t event_wait;
466 struct list_head event_list;
469 struct drm_prime_file_private prime;
474 atomic_t use_count; /**< Outstanding uses (+1) */
475 atomic_t finalization; /**< Finalization in progress */
476 atomic_t block_count; /**< Count of processes waiting */
477 atomic_t block_read; /**< Queue blocked for reads */
478 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
479 atomic_t block_write; /**< Queue blocked for writes */
480 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
481 atomic_t total_queued; /**< Total queued statistic */
482 atomic_t total_flushed; /**< Total flushes statistic */
483 atomic_t total_locks; /**< Total locks statistics */
484 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
485 struct drm_waitlist waitlist; /**< Pending buffers */
486 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
492 struct drm_lock_data {
493 struct drm_hw_lock *hw_lock; /**< Hardware lock */
494 /** Private of lock holder's file (NULL=kernel) */
495 struct drm_file *file_priv;
496 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
497 unsigned long lock_time; /**< Time of last lock in jiffies */
499 uint32_t kernel_waiters;
500 uint32_t user_waiters;
507 struct drm_device_dma {
509 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
510 int buf_count; /**< total number of buffers */
511 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
513 int page_count; /**< number of pages */
514 unsigned long *pagelist; /**< page list */
515 unsigned long byte_count;
517 _DRM_DMA_USE_AGP = 0x01,
518 _DRM_DMA_USE_SG = 0x02,
519 _DRM_DMA_USE_FB = 0x04,
520 _DRM_DMA_USE_PCI_RO = 0x08
526 * AGP memory entry. Stored as a doubly linked list.
529 unsigned long handle; /**< handle */
530 struct agp_memory *memory;
531 unsigned long bound; /**< address */
533 struct list_head head;
539 * \sa drm_agp_init() and drm_device::agp.
541 struct drm_agp_head {
542 struct agp_kern_info agp_info; /**< AGP device information */
543 struct list_head memory;
544 unsigned long mode; /**< AGP mode */
545 struct agp_bridge_data *bridge;
546 int enabled; /**< whether the AGP bus as been enabled */
547 int acquired; /**< whether the AGP device has been acquired */
550 int cant_use_aperture;
551 unsigned long page_mask;
555 * Scatter-gather memory.
558 unsigned long handle;
561 struct page **pagelist;
567 struct drm_hw_lock *lock;
572 * Kernel side of a mapping
574 struct drm_local_map {
575 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
576 unsigned long size; /**< Requested physical size (bytes) */
577 enum drm_map_type type; /**< Type of memory to map */
578 enum drm_map_flags flags; /**< Flags */
579 void *handle; /**< User-space: "Handle" to pass to mmap() */
580 /**< Kernel-space: kernel-virtual address */
581 int mtrr; /**< MTRR slot used */
584 typedef struct drm_local_map drm_local_map_t;
589 struct drm_map_list {
590 struct list_head head; /**< list head */
591 struct drm_hash_item hash;
592 struct drm_local_map *map; /**< mapping */
594 struct drm_master *master;
598 * Context handle list
600 struct drm_ctx_list {
601 struct list_head head; /**< list head */
602 drm_context_t handle; /**< context handle */
603 struct drm_file *tag; /**< associated fd private data */
606 /* location of GART table */
607 #define DRM_ATI_GART_MAIN 1
608 #define DRM_ATI_GART_FB 2
610 #define DRM_ATI_GART_PCI 1
611 #define DRM_ATI_GART_PCIE 2
612 #define DRM_ATI_GART_IGP 3
614 struct drm_ati_pcigart_info {
615 int gart_table_location;
619 dma_addr_t table_mask;
620 struct drm_dma_handle *table_handle;
621 struct drm_local_map mapping;
626 * GEM specific mm private for tracking GEM objects
629 struct drm_vma_offset_manager vma_manager;
633 * This structure defines the drm_mm memory object, which will be used by the
634 * DRM for its buffer objects.
636 struct drm_gem_object {
637 /** Reference count of this object */
638 struct kref refcount;
641 * handle_count - gem file_priv handle count of this object
643 * Each handle also holds a reference. Note that when the handle_count
644 * drops to 0 any global names (e.g. the id in the flink namespace) will
647 * Protected by dev->object_name_lock.
649 unsigned handle_count;
651 /** Related drm device */
652 struct drm_device *dev;
654 /** File representing the shmem storage */
657 /* Mapping info for this object */
658 struct drm_vma_offset_node vma_node;
661 * Size of the object, in bytes. Immutable over the object's
667 * Global name for this object, starts at 1. 0 means unnamed.
668 * Access is covered by the object_name_lock in the related drm_device
673 * Memory domains. These monitor which caches contain read/write data
674 * related to the object. When transitioning from one set of domains
675 * to another, the driver is called to ensure that caches are suitably
676 * flushed and invalidated
678 uint32_t read_domains;
679 uint32_t write_domain;
682 * While validating an exec operation, the
683 * new read/write domain values are computed here.
684 * They will be transferred to the above values
685 * at the point that any cache flushing occurs
687 uint32_t pending_read_domains;
688 uint32_t pending_write_domain;
691 * dma_buf - dma buf associated with this GEM object
693 * Pointer to the dma-buf associated with this gem object (either
694 * through importing or exporting). We break the resulting reference
695 * loop when the last gem handle for this object is released.
697 * Protected by obj->object_name_lock
699 struct dma_buf *dma_buf;
702 * import_attach - dma buf attachment backing this object
704 * Any foreign dma_buf imported as a gem object has this set to the
705 * attachment point for the device. This is invariant over the lifetime
708 * The driver's ->gem_free_object callback is responsible for cleaning
709 * up the dma_buf attachment and references acquired at import time.
711 * Note that the drm gem/prime core does not depend upon drivers setting
712 * this field any more. So for drivers where this doesn't make sense
713 * (e.g. virtual devices or a displaylink behind an usb bus) they can
714 * simply leave it as NULL.
716 struct dma_buf_attachment *import_attach;
719 #include <drm/drm_crtc.h>
721 /* per-master structure */
724 struct kref refcount; /* refcount for this master */
726 struct list_head head; /**< each minor contains a list of masters */
727 struct drm_minor *minor; /**< link back to minor we are a master for */
729 char *unique; /**< Unique identifier: e.g., busid */
730 int unique_len; /**< Length of unique field */
731 int unique_size; /**< amount allocated */
733 int blocked; /**< Blocked due to VC switch? */
735 /** \name Authentication */
737 struct drm_open_hash magiclist;
738 struct list_head magicfree;
741 struct drm_lock_data lock; /**< Information on hardware lock */
743 void *driver_priv; /**< Private structure for driver to use */
746 /* Size of ringbuffer for vblank timestamps. Just double-buffer
747 * in initial implementation.
749 #define DRM_VBLANKTIME_RBSIZE 2
751 /* Flags and return codes for get_vblank_timestamp() driver function. */
752 #define DRM_CALLED_FROM_VBLIRQ 1
753 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
754 #define DRM_VBLANKTIME_INVBL (1 << 1)
756 /* get_scanout_position() return flags */
757 #define DRM_SCANOUTPOS_VALID (1 << 0)
758 #define DRM_SCANOUTPOS_INVBL (1 << 1)
759 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
763 int (*get_irq)(struct drm_device *dev);
764 const char *(*get_name)(struct drm_device *dev);
765 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
766 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
767 struct drm_unique *unique);
768 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
772 * DRM driver structure. This structure represent the common code for
773 * a family of cards. There will one drm_device for each card present
777 int (*load) (struct drm_device *, unsigned long flags);
778 int (*firstopen) (struct drm_device *);
779 int (*open) (struct drm_device *, struct drm_file *);
780 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
781 void (*postclose) (struct drm_device *, struct drm_file *);
782 void (*lastclose) (struct drm_device *);
783 int (*unload) (struct drm_device *);
784 int (*suspend) (struct drm_device *, pm_message_t state);
785 int (*resume) (struct drm_device *);
786 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
787 int (*dma_quiescent) (struct drm_device *);
788 int (*context_dtor) (struct drm_device *dev, int context);
791 * get_vblank_counter - get raw hardware vblank counter
793 * @crtc: counter to fetch
795 * Driver callback for fetching a raw hardware vblank counter for @crtc.
796 * If a device doesn't have a hardware counter, the driver can simply
797 * return the value of drm_vblank_count. The DRM core will account for
798 * missed vblank events while interrupts where disabled based on system
801 * Wraparound handling and loss of events due to modesetting is dealt
802 * with in the DRM core code.
805 * Raw vblank counter value.
807 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
810 * enable_vblank - enable vblank interrupt events
812 * @crtc: which irq to enable
814 * Enable vblank interrupts for @crtc. If the device doesn't have
815 * a hardware vblank counter, this routine should be a no-op, since
816 * interrupts will have to stay on to keep the count accurate.
819 * Zero on success, appropriate errno if the given @crtc's vblank
820 * interrupt cannot be enabled.
822 int (*enable_vblank) (struct drm_device *dev, int crtc);
825 * disable_vblank - disable vblank interrupt events
827 * @crtc: which irq to enable
829 * Disable vblank interrupts for @crtc. If the device doesn't have
830 * a hardware vblank counter, this routine should be a no-op, since
831 * interrupts will have to stay on to keep the count accurate.
833 void (*disable_vblank) (struct drm_device *dev, int crtc);
836 * Called by \c drm_device_is_agp. Typically used to determine if a
837 * card is really attached to AGP or not.
839 * \param dev DRM device handle
842 * One of three values is returned depending on whether or not the
843 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
844 * (return of 1), or may or may not be AGP (return of 2).
846 int (*device_is_agp) (struct drm_device *dev);
849 * Called by vblank timestamping code.
851 * Return the current display scanout position from a crtc, and an
852 * optional accurate ktime_get timestamp of when position was measured.
854 * \param dev DRM device.
855 * \param crtc Id of the crtc to query.
856 * \param *vpos Target location for current vertical scanout position.
857 * \param *hpos Target location for current horizontal scanout position.
858 * \param *stime Target location for timestamp taken immediately before
859 * scanout position query. Can be NULL to skip timestamp.
860 * \param *etime Target location for timestamp taken immediately after
861 * scanout position query. Can be NULL to skip timestamp.
863 * Returns vpos as a positive number while in active scanout area.
864 * Returns vpos as a negative number inside vblank, counting the number
865 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
866 * until start of active scanout / end of vblank."
868 * \return Flags, or'ed together as follows:
870 * DRM_SCANOUTPOS_VALID = Query successful.
871 * DRM_SCANOUTPOS_INVBL = Inside vblank.
872 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
873 * this flag means that returned position may be offset by a constant
874 * but unknown small number of scanlines wrt. real scanout position.
877 int (*get_scanout_position) (struct drm_device *dev, int crtc,
878 int *vpos, int *hpos, ktime_t *stime,
882 * Called by \c drm_get_last_vbltimestamp. Should return a precise
883 * timestamp when the most recent VBLANK interval ended or will end.
885 * Specifically, the timestamp in @vblank_time should correspond as
886 * closely as possible to the time when the first video scanline of
887 * the video frame after the end of VBLANK will start scanning out,
888 * the time immediately after end of the VBLANK interval. If the
889 * @crtc is currently inside VBLANK, this will be a time in the future.
890 * If the @crtc is currently scanning out a frame, this will be the
891 * past start time of the current scanout. This is meant to adhere
892 * to the OpenML OML_sync_control extension specification.
894 * \param dev dev DRM device handle.
895 * \param crtc crtc for which timestamp should be returned.
896 * \param *max_error Maximum allowable timestamp error in nanoseconds.
897 * Implementation should strive to provide timestamp
898 * with an error of at most *max_error nanoseconds.
899 * Returns true upper bound on error for timestamp.
900 * \param *vblank_time Target location for returned vblank timestamp.
901 * \param flags 0 = Defaults, no special treatment needed.
902 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
903 * irq handler. Some drivers need to apply some workarounds
904 * for gpu-specific vblank irq quirks if flag is set.
907 * Zero if timestamping isn't supported in current display mode or a
908 * negative number on failure. A positive status code on success,
909 * which describes how the vblank_time timestamp was computed.
911 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
913 struct timeval *vblank_time,
916 /* these have to be filled in */
918 irqreturn_t(*irq_handler) (int irq, void *arg);
919 void (*irq_preinstall) (struct drm_device *dev);
920 int (*irq_postinstall) (struct drm_device *dev);
921 void (*irq_uninstall) (struct drm_device *dev);
923 /* Master routines */
924 int (*master_create)(struct drm_device *dev, struct drm_master *master);
925 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
927 * master_set is called whenever the minor master is set.
928 * master_drop is called whenever the minor master is dropped.
931 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
933 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
936 int (*debugfs_init)(struct drm_minor *minor);
937 void (*debugfs_cleanup)(struct drm_minor *minor);
940 * Driver-specific constructor for drm_gem_objects, to set up
941 * obj->driver_private.
943 * Returns 0 on success.
945 void (*gem_free_object) (struct drm_gem_object *obj);
946 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
947 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
950 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
951 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
952 uint32_t handle, uint32_t flags, int *prime_fd);
953 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
954 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
955 int prime_fd, uint32_t *handle);
956 /* export GEM -> dmabuf */
957 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
958 struct drm_gem_object *obj, int flags);
959 /* import dmabuf -> GEM */
960 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
961 struct dma_buf *dma_buf);
962 /* low-level interface used by drm_gem_prime_{import,export} */
963 int (*gem_prime_pin)(struct drm_gem_object *obj);
964 void (*gem_prime_unpin)(struct drm_gem_object *obj);
965 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
966 struct drm_gem_object *(*gem_prime_import_sg_table)(
967 struct drm_device *dev, size_t size,
968 struct sg_table *sgt);
969 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
970 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
971 int (*gem_prime_mmap)(struct drm_gem_object *obj,
972 struct vm_area_struct *vma);
974 /* vga arb irq handler */
975 void (*vgaarb_irq)(struct drm_device *dev, bool state);
977 /* dumb alloc support */
978 int (*dumb_create)(struct drm_file *file_priv,
979 struct drm_device *dev,
980 struct drm_mode_create_dumb *args);
981 int (*dumb_map_offset)(struct drm_file *file_priv,
982 struct drm_device *dev, uint32_t handle,
984 int (*dumb_destroy)(struct drm_file *file_priv,
985 struct drm_device *dev,
988 /* Driver private ops for this object */
989 const struct vm_operations_struct *gem_vm_ops;
1000 const struct drm_ioctl_desc *ioctls;
1002 const struct file_operations *fops;
1004 struct pci_driver *pci;
1005 struct platform_device *platform_device;
1006 struct usb_driver *usb;
1008 struct drm_bus *bus;
1010 /* List of devices hanging off this driver with stealth attach. */
1011 struct list_head legacy_dev_list;
1014 #define DRM_MINOR_UNASSIGNED 0
1015 #define DRM_MINOR_LEGACY 1
1016 #define DRM_MINOR_CONTROL 2
1017 #define DRM_MINOR_RENDER 3
1020 * Info file list entry. This structure represents a debugfs or proc file to
1021 * be created by the drm core
1023 struct drm_info_list {
1024 const char *name; /** file name */
1025 int (*show)(struct seq_file*, void*); /** show callback */
1026 u32 driver_features; /**< Required driver features for this entry */
1031 * debugfs node structure. This structure represents a debugfs file.
1033 struct drm_info_node {
1034 struct list_head list;
1035 struct drm_minor *minor;
1036 const struct drm_info_list *info_ent;
1037 struct dentry *dent;
1041 * DRM minor structure. This structure represents a drm minor number.
1044 int index; /**< Minor device number */
1045 int type; /**< Control or render */
1046 dev_t device; /**< Device number for mknod */
1047 struct device *kdev; /**< Linux device */
1048 struct drm_device *dev;
1050 struct dentry *debugfs_root;
1052 struct list_head debugfs_list;
1053 struct mutex debugfs_lock; /* Protects debugfs_list. */
1055 struct drm_master *master; /* currently active master for this node */
1056 struct list_head master_list;
1057 struct drm_mode_group mode_group;
1060 /* mode specified on the command line */
1061 struct drm_cmdline_mode {
1063 bool refresh_specified;
1072 enum drm_connector_force force;
1076 struct drm_pending_vblank_event {
1077 struct drm_pending_event base;
1079 struct drm_event_vblank event;
1082 struct drm_vblank_crtc {
1083 wait_queue_head_t queue; /**< VBLANK wait queue */
1084 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1085 atomic_t count; /**< number of VBLANK interrupts */
1086 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1087 u32 last; /* protected by dev->vbl_lock, used */
1088 /* for wraparound handling */
1089 u32 last_wait; /* Last vblank seqno waited per CRTC */
1090 unsigned int inmodeset; /* Display driver is setting mode */
1091 bool enabled; /* so we don't call enable more than
1096 * DRM device structure. This structure represent a complete card that
1097 * may contain multiple heads.
1100 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1101 char *devname; /**< For /proc/interrupts */
1102 int if_version; /**< Highest interface version set */
1106 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1107 struct mutex struct_mutex; /**< For others */
1110 /** \name Usage Counters */
1112 int open_count; /**< Outstanding files open */
1113 atomic_t ioctl_count; /**< Outstanding IOCTLs pending */
1114 atomic_t vma_count; /**< Outstanding vma areas open */
1115 int buf_use; /**< Buffers in use -- cannot alloc */
1116 atomic_t buf_alloc; /**< Buffer allocation in progress */
1119 struct list_head filelist;
1121 /** \name Memory management */
1123 struct list_head maplist; /**< Linked list of regions */
1124 struct drm_open_hash map_hash; /**< User token hash table for maps */
1126 /** \name Context handle management */
1128 struct list_head ctxlist; /**< Linked list of context handles */
1129 struct mutex ctxlist_mutex; /**< For ctxlist */
1133 struct list_head vmalist; /**< List of vmas (for debugging) */
1137 /** \name DMA support */
1139 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1142 /** \name Context support */
1144 bool irq_enabled; /**< True if irq handler is enabled */
1145 __volatile__ long context_flag; /**< Context swapping flag */
1146 int last_context; /**< Last current context */
1149 /** \name VBLANK IRQ support */
1153 * At load time, disabling the vblank interrupt won't be allowed since
1154 * old clients may not call the modeset ioctl and therefore misbehave.
1155 * Once the modeset ioctl *has* been called though, we can safely
1156 * disable them when unused.
1158 bool vblank_disable_allowed;
1160 /* array of size num_crtcs */
1161 struct drm_vblank_crtc *vblank;
1163 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1164 spinlock_t vbl_lock;
1165 struct timer_list vblank_disable_timer;
1167 u32 max_vblank_count; /**< size of vblank counter register */
1172 struct list_head vblank_event_list;
1173 spinlock_t event_lock;
1177 struct drm_agp_head *agp; /**< AGP data */
1179 struct device *dev; /**< Device structure */
1180 struct pci_dev *pdev; /**< PCI device structure */
1182 struct pci_controller *hose;
1185 struct platform_device *platformdev; /**< Platform device struture */
1186 struct usb_device *usbdev;
1188 struct drm_sg_mem *sg; /**< Scatter gather memory */
1189 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1190 void *dev_private; /**< device private data */
1192 struct address_space *dev_mapping;
1193 struct drm_sigdata sigdata; /**< For block_all_signals */
1196 struct drm_driver *driver;
1197 struct drm_local_map *agp_buffer_map;
1198 unsigned int agp_buffer_token;
1199 struct drm_minor *control; /**< Control node for card */
1200 struct drm_minor *primary; /**< render type primary screen head */
1201 struct drm_minor *render; /**< render node for card */
1203 struct drm_mode_config mode_config; /**< Current mode config */
1205 /** \name GEM information */
1207 struct mutex object_name_lock;
1208 struct idr object_name_idr;
1210 int switch_power_state;
1212 atomic_t unplugged; /* device has been unplugged or gone away */
1215 #define DRM_SWITCH_POWER_ON 0
1216 #define DRM_SWITCH_POWER_OFF 1
1217 #define DRM_SWITCH_POWER_CHANGING 2
1218 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1220 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1223 return ((dev->driver->driver_features & feature) ? 1 : 0);
1226 static inline int drm_dev_to_irq(struct drm_device *dev)
1228 return dev->driver->bus->get_irq(dev);
1231 static inline void drm_device_set_unplugged(struct drm_device *dev)
1234 atomic_set(&dev->unplugged, 1);
1237 static inline int drm_device_is_unplugged(struct drm_device *dev)
1239 int ret = atomic_read(&dev->unplugged);
1244 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1246 return mutex_is_locked(&dev->mode_config.mutex);
1249 static inline bool drm_is_render_client(struct drm_file *file_priv)
1251 return file_priv->minor->type == DRM_MINOR_RENDER;
1254 /******************************************************************/
1255 /** \name Internal function definitions */
1258 /* Driver support (drm_drv.h) */
1259 extern long drm_ioctl(struct file *filp,
1260 unsigned int cmd, unsigned long arg);
1261 extern long drm_compat_ioctl(struct file *filp,
1262 unsigned int cmd, unsigned long arg);
1263 extern int drm_lastclose(struct drm_device *dev);
1265 /* Device support (drm_fops.h) */
1266 extern struct mutex drm_global_mutex;
1267 extern int drm_open(struct inode *inode, struct file *filp);
1268 extern int drm_stub_open(struct inode *inode, struct file *filp);
1269 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1270 size_t count, loff_t *offset);
1271 extern int drm_release(struct inode *inode, struct file *filp);
1273 /* Mapping support (drm_vm.h) */
1274 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1275 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1276 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1277 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1278 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1280 /* Memory management support (drm_memory.h) */
1281 #include <drm/drm_memory.h>
1284 /* Misc. IOCTL support (drm_ioctl.h) */
1285 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1286 struct drm_file *file_priv);
1287 extern int drm_getunique(struct drm_device *dev, void *data,
1288 struct drm_file *file_priv);
1289 extern int drm_setunique(struct drm_device *dev, void *data,
1290 struct drm_file *file_priv);
1291 extern int drm_getmap(struct drm_device *dev, void *data,
1292 struct drm_file *file_priv);
1293 extern int drm_getclient(struct drm_device *dev, void *data,
1294 struct drm_file *file_priv);
1295 extern int drm_getstats(struct drm_device *dev, void *data,
1296 struct drm_file *file_priv);
1297 extern int drm_getcap(struct drm_device *dev, void *data,
1298 struct drm_file *file_priv);
1299 extern int drm_setclientcap(struct drm_device *dev, void *data,
1300 struct drm_file *file_priv);
1301 extern int drm_setversion(struct drm_device *dev, void *data,
1302 struct drm_file *file_priv);
1303 extern int drm_noop(struct drm_device *dev, void *data,
1304 struct drm_file *file_priv);
1306 /* Context IOCTL support (drm_context.h) */
1307 extern int drm_resctx(struct drm_device *dev, void *data,
1308 struct drm_file *file_priv);
1309 extern int drm_addctx(struct drm_device *dev, void *data,
1310 struct drm_file *file_priv);
1311 extern int drm_getctx(struct drm_device *dev, void *data,
1312 struct drm_file *file_priv);
1313 extern int drm_switchctx(struct drm_device *dev, void *data,
1314 struct drm_file *file_priv);
1315 extern int drm_newctx(struct drm_device *dev, void *data,
1316 struct drm_file *file_priv);
1317 extern int drm_rmctx(struct drm_device *dev, void *data,
1318 struct drm_file *file_priv);
1320 extern int drm_ctxbitmap_init(struct drm_device *dev);
1321 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1322 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1324 extern int drm_setsareactx(struct drm_device *dev, void *data,
1325 struct drm_file *file_priv);
1326 extern int drm_getsareactx(struct drm_device *dev, void *data,
1327 struct drm_file *file_priv);
1329 /* Authentication IOCTL support (drm_auth.h) */
1330 extern int drm_getmagic(struct drm_device *dev, void *data,
1331 struct drm_file *file_priv);
1332 extern int drm_authmagic(struct drm_device *dev, void *data,
1333 struct drm_file *file_priv);
1334 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1336 /* Cache management (drm_cache.c) */
1337 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1338 void drm_clflush_sg(struct sg_table *st);
1339 void drm_clflush_virt_range(char *addr, unsigned long length);
1341 /* Locking IOCTL support (drm_lock.h) */
1342 extern int drm_lock(struct drm_device *dev, void *data,
1343 struct drm_file *file_priv);
1344 extern int drm_unlock(struct drm_device *dev, void *data,
1345 struct drm_file *file_priv);
1346 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1347 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1348 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1351 * These are exported to drivers so that they can implement fencing using
1352 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1355 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1357 /* Buffer management support (drm_bufs.h) */
1358 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1359 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1360 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1361 unsigned int size, enum drm_map_type type,
1362 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1363 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1364 struct drm_file *file_priv);
1365 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1366 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1367 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1368 struct drm_file *file_priv);
1369 extern int drm_addbufs(struct drm_device *dev, void *data,
1370 struct drm_file *file_priv);
1371 extern int drm_infobufs(struct drm_device *dev, void *data,
1372 struct drm_file *file_priv);
1373 extern int drm_markbufs(struct drm_device *dev, void *data,
1374 struct drm_file *file_priv);
1375 extern int drm_freebufs(struct drm_device *dev, void *data,
1376 struct drm_file *file_priv);
1377 extern int drm_mapbufs(struct drm_device *dev, void *data,
1378 struct drm_file *file_priv);
1379 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1380 struct drm_file *file_priv);
1382 /* DMA support (drm_dma.h) */
1383 extern int drm_legacy_dma_setup(struct drm_device *dev);
1384 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1385 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1386 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1387 struct drm_file *filp);
1389 /* IRQ support (drm_irq.h) */
1390 extern int drm_control(struct drm_device *dev, void *data,
1391 struct drm_file *file_priv);
1392 extern int drm_irq_install(struct drm_device *dev);
1393 extern int drm_irq_uninstall(struct drm_device *dev);
1395 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1396 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1397 struct drm_file *filp);
1398 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1399 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1400 struct timeval *vblanktime);
1401 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1402 struct drm_pending_vblank_event *e);
1403 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1404 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1405 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1406 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1407 extern void drm_vblank_cleanup(struct drm_device *dev);
1408 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1409 struct timeval *tvblank, unsigned flags);
1410 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1411 int crtc, int *max_error,
1412 struct timeval *vblank_time,
1414 struct drm_crtc *refcrtc);
1415 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);
1418 drm_mode_parse_command_line_for_connector(const char *mode_option,
1419 struct drm_connector *connector,
1420 struct drm_cmdline_mode *mode);
1422 extern struct drm_display_mode *
1423 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1424 struct drm_cmdline_mode *cmd);
1426 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1427 struct drm_display_mode *dmode);
1428 extern int of_get_drm_display_mode(struct device_node *np,
1429 struct drm_display_mode *dmode,
1432 /* Modesetting support */
1433 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1434 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1435 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1436 struct drm_file *file_priv);
1438 /* AGP/GART support (drm_agpsupport.h) */
1440 #include <drm/drm_agpsupport.h>
1442 /* Stub support (drm_stub.h) */
1443 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1444 struct drm_file *file_priv);
1445 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1446 struct drm_file *file_priv);
1447 struct drm_master *drm_master_create(struct drm_minor *minor);
1448 extern struct drm_master *drm_master_get(struct drm_master *master);
1449 extern void drm_master_put(struct drm_master **master);
1451 extern void drm_put_dev(struct drm_device *dev);
1452 extern void drm_unplug_dev(struct drm_device *dev);
1453 extern unsigned int drm_debug;
1454 extern unsigned int drm_rnodes;
1456 extern unsigned int drm_vblank_offdelay;
1457 extern unsigned int drm_timestamp_precision;
1458 extern unsigned int drm_timestamp_monotonic;
1460 extern struct class *drm_class;
1461 extern struct dentry *drm_debugfs_root;
1463 extern struct idr drm_minors_idr;
1465 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1467 /* Debugfs support */
1468 #if defined(CONFIG_DEBUG_FS)
1469 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1470 struct dentry *root);
1471 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1472 int count, struct dentry *root,
1473 struct drm_minor *minor);
1474 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1475 int count, struct drm_minor *minor);
1476 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1478 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1479 struct dentry *root)
1484 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1485 int count, struct dentry *root,
1486 struct drm_minor *minor)
1491 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1492 int count, struct drm_minor *minor)
1497 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1503 /* Info file support */
1504 extern int drm_name_info(struct seq_file *m, void *data);
1505 extern int drm_vm_info(struct seq_file *m, void *data);
1506 extern int drm_bufs_info(struct seq_file *m, void *data);
1507 extern int drm_vblank_info(struct seq_file *m, void *data);
1508 extern int drm_clients_info(struct seq_file *m, void* data);
1509 extern int drm_gem_name_info(struct seq_file *m, void *data);
1512 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1513 struct drm_gem_object *obj, int flags);
1514 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1515 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1517 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1518 struct dma_buf *dma_buf);
1519 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1520 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1521 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1523 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1524 struct drm_file *file_priv);
1525 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1526 struct drm_file *file_priv);
1528 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1529 dma_addr_t *addrs, int max_pages);
1530 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1531 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1533 int drm_gem_dumb_destroy(struct drm_file *file,
1534 struct drm_device *dev,
1537 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1538 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1539 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1542 extern int drm_vma_info(struct seq_file *m, void *data);
1545 /* Scatter Gather Support (drm_scatter.h) */
1546 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1547 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1548 struct drm_file *file_priv);
1549 extern int drm_sg_free(struct drm_device *dev, void *data,
1550 struct drm_file *file_priv);
1552 /* ATI PCIGART support (ati_pcigart.h) */
1553 extern int drm_ati_pcigart_init(struct drm_device *dev,
1554 struct drm_ati_pcigart_info * gart_info);
1555 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1556 struct drm_ati_pcigart_info * gart_info);
1558 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1560 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1561 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1563 /* sysfs support (drm_sysfs.c) */
1564 struct drm_sysfs_class;
1565 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1566 extern void drm_sysfs_destroy(void);
1567 extern int drm_sysfs_device_add(struct drm_minor *minor);
1568 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1569 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1570 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1571 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1573 /* Graphics Execution Manager library functions (drm_gem.c) */
1574 int drm_gem_init(struct drm_device *dev);
1575 void drm_gem_destroy(struct drm_device *dev);
1576 void drm_gem_object_release(struct drm_gem_object *obj);
1577 void drm_gem_object_free(struct kref *kref);
1578 int drm_gem_object_init(struct drm_device *dev,
1579 struct drm_gem_object *obj, size_t size);
1580 void drm_gem_private_object_init(struct drm_device *dev,
1581 struct drm_gem_object *obj, size_t size);
1582 void drm_gem_vm_open(struct vm_area_struct *vma);
1583 void drm_gem_vm_close(struct vm_area_struct *vma);
1584 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1585 struct vm_area_struct *vma);
1586 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1588 #include <drm/drm_global.h>
1591 drm_gem_object_reference(struct drm_gem_object *obj)
1593 kref_get(&obj->refcount);
1597 drm_gem_object_unreference(struct drm_gem_object *obj)
1600 kref_put(&obj->refcount, drm_gem_object_free);
1604 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1606 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1607 struct drm_device *dev = obj->dev;
1609 mutex_lock(&dev->struct_mutex);
1610 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1611 drm_gem_object_free(&obj->refcount);
1612 mutex_unlock(&dev->struct_mutex);
1616 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1617 struct drm_gem_object *obj,
1619 int drm_gem_handle_create(struct drm_file *file_priv,
1620 struct drm_gem_object *obj,
1622 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1625 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1626 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1627 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1629 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1630 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1631 bool dirty, bool accessed);
1633 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1634 struct drm_file *filp,
1636 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1637 struct drm_file *file_priv);
1638 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1639 struct drm_file *file_priv);
1640 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1641 struct drm_file *file_priv);
1642 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1643 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1645 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1646 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1647 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1649 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1652 struct drm_map_list *_entry;
1653 list_for_each_entry(_entry, &dev->maplist, head)
1654 if (_entry->user_token == token)
1659 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1663 #include <drm/drm_mem_util.h>
1665 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1666 struct device *parent);
1667 void drm_dev_free(struct drm_device *dev);
1668 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1669 void drm_dev_unregister(struct drm_device *dev);
1673 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1675 if (dev->driver->device_is_agp != NULL) {
1676 int err = (*dev->driver->device_is_agp) (dev);
1683 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1685 void drm_pci_agp_destroy(struct drm_device *dev);
1687 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1688 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1689 extern int drm_get_pci_dev(struct pci_dev *pdev,
1690 const struct pci_device_id *ent,
1691 struct drm_driver *driver);
1693 #define DRM_PCIE_SPEED_25 1
1694 #define DRM_PCIE_SPEED_50 2
1695 #define DRM_PCIE_SPEED_80 4
1697 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1699 /* platform section */
1700 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1702 /* returns true if currently okay to sleep */
1703 static __inline__ bool drm_can_sleep(void)
1705 if (in_atomic() || in_dbg_master() || irqs_disabled())
1710 #endif /* __KERNEL__ */