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__)
202 #define DRM_INFO_ONCE(fmt, ...) \
203 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
208 * \param fmt printf() like format string.
209 * \param arg arguments
212 #define DRM_DEBUG(fmt, args...) \
214 drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, \
215 __func__, fmt, ##args); \
218 #define DRM_DEBUG_DRIVER(fmt, args...) \
220 drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME, \
221 __func__, fmt, ##args); \
223 #define DRM_DEBUG_KMS(fmt, args...) \
225 drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
226 __func__, fmt, ##args); \
228 #define DRM_DEBUG_PRIME(fmt, args...) \
230 drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
231 __func__, fmt, ##args); \
233 #define DRM_LOG(fmt, args...) \
235 drm_ut_debug_printk(DRM_UT_CORE, NULL, \
236 NULL, fmt, ##args); \
238 #define DRM_LOG_KMS(fmt, args...) \
240 drm_ut_debug_printk(DRM_UT_KMS, NULL, \
241 NULL, fmt, ##args); \
243 #define DRM_LOG_MODE(fmt, args...) \
245 drm_ut_debug_printk(DRM_UT_MODE, NULL, \
246 NULL, fmt, ##args); \
248 #define DRM_LOG_DRIVER(fmt, args...) \
250 drm_ut_debug_printk(DRM_UT_DRIVER, NULL, \
251 NULL, fmt, ##args); \
254 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
255 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
256 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
257 #define DRM_DEBUG(fmt, arg...) do { } while (0)
258 #define DRM_LOG(fmt, arg...) do { } while (0)
259 #define DRM_LOG_KMS(fmt, args...) do { } while (0)
260 #define DRM_LOG_MODE(fmt, arg...) do { } while (0)
261 #define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
267 /***********************************************************************/
268 /** \name Internal types and structures */
271 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
273 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
276 * Test that the hardware lock is held by the caller, returning otherwise.
278 * \param dev DRM device.
279 * \param filp file pointer of the caller.
281 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
283 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
284 _file_priv->master->lock.file_priv != _file_priv) { \
285 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
286 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
287 _file_priv->master->lock.file_priv, _file_priv); \
293 * Ioctl function type.
295 * \param inode device inode.
296 * \param file_priv DRM file private pointer.
297 * \param cmd command.
298 * \param arg argument.
300 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
301 struct drm_file *file_priv);
303 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
306 #define DRM_IOCTL_NR(n) _IOC_NR(n)
307 #define DRM_MAJOR 226
310 #define DRM_MASTER 0x2
311 #define DRM_ROOT_ONLY 0x4
312 #define DRM_CONTROL_ALLOW 0x8
313 #define DRM_UNLOCKED 0x10
314 #define DRM_RENDER_ALLOW 0x20
316 struct drm_ioctl_desc {
320 unsigned int cmd_drv;
325 * Creates a driver or general drm_ioctl_desc array entry for the given
326 * ioctl, for use by drm_ioctl().
329 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
330 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
332 struct drm_magic_entry {
333 struct list_head head;
334 struct drm_hash_item hash_item;
335 struct drm_file *priv;
338 struct drm_vma_entry {
339 struct list_head head;
340 struct vm_area_struct *vma;
348 int idx; /**< Index into master buflist */
349 int total; /**< Buffer size */
350 int order; /**< log-base-2(total) */
351 int used; /**< Amount of buffer in use (for DMA) */
352 unsigned long offset; /**< Byte offset (used internally) */
353 void *address; /**< Address of buffer */
354 unsigned long bus_address; /**< Bus address of buffer */
355 struct drm_buf *next; /**< Kernel-only: used for free list */
356 __volatile__ int waiting; /**< On kernel DMA queue */
357 __volatile__ int pending; /**< On hardware DMA queue */
358 struct drm_file *file_priv; /**< Private of holding file descr */
359 int context; /**< Kernel queue for this buffer */
360 int while_locked; /**< Dispatch this buffer while locked */
368 } list; /**< Which list we're on */
370 int dev_priv_size; /**< Size of buffer private storage */
371 void *dev_private; /**< Per-buffer private storage */
374 /** bufs is one longer than it has to be */
375 struct drm_waitlist {
376 int count; /**< Number of possible buffers */
377 struct drm_buf **bufs; /**< List of pointers to buffers */
378 struct drm_buf **rp; /**< Read pointer */
379 struct drm_buf **wp; /**< Write pointer */
380 struct drm_buf **end; /**< End pointer */
381 spinlock_t read_lock;
382 spinlock_t write_lock;
385 struct drm_freelist {
386 int initialized; /**< Freelist in use */
387 atomic_t count; /**< Number of free buffers */
388 struct drm_buf *next; /**< End pointer */
390 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
391 int low_mark; /**< Low water mark */
392 int high_mark; /**< High water mark */
393 atomic_t wfh; /**< If waiting for high mark */
397 typedef struct drm_dma_handle {
404 * Buffer entry. There is one of this for each buffer size order.
406 struct drm_buf_entry {
407 int buf_size; /**< size */
408 int buf_count; /**< number of buffers */
409 struct drm_buf *buflist; /**< buffer list */
412 struct drm_dma_handle **seglist;
414 struct drm_freelist freelist;
417 /* Event queued up for userspace to read */
418 struct drm_pending_event {
419 struct drm_event *event;
420 struct list_head link;
421 struct drm_file *file_priv;
422 pid_t pid; /* pid of requester, no guarantee it's valid by the time
423 we deliver the event, for tracing only */
424 void (*destroy)(struct drm_pending_event *event);
427 /* initial implementaton using a linked list - todo hashtab */
428 struct drm_prime_file_private {
429 struct list_head head;
433 /** File private data */
435 unsigned always_authenticated :1;
436 unsigned authenticated :1;
437 unsigned is_master :1; /* this file private is a master for a minor */
438 /* true when the client has asked us to expose stereo 3D mode flags */
439 unsigned stereo_allowed :1;
444 struct list_head lhead;
445 struct drm_minor *minor;
446 unsigned long lock_count;
448 /** Mapping of mm object handles to object pointers. */
449 struct idr object_idr;
450 /** Lock for synchronization of access to object_idr. */
451 spinlock_t table_lock;
456 struct drm_master *master; /* master this node is currently associated with
457 N.B. not always minor->master */
459 * fbs - List of framebuffers associated with this file.
461 * Protected by fbs_lock. Note that the fbs list holds a reference on
462 * the fb object to prevent it from untimely disappearing.
464 struct list_head fbs;
465 struct mutex fbs_lock;
467 wait_queue_head_t event_wait;
468 struct list_head event_list;
471 struct drm_prime_file_private prime;
476 atomic_t use_count; /**< Outstanding uses (+1) */
477 atomic_t finalization; /**< Finalization in progress */
478 atomic_t block_count; /**< Count of processes waiting */
479 atomic_t block_read; /**< Queue blocked for reads */
480 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
481 atomic_t block_write; /**< Queue blocked for writes */
482 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
483 atomic_t total_queued; /**< Total queued statistic */
484 atomic_t total_flushed; /**< Total flushes statistic */
485 atomic_t total_locks; /**< Total locks statistics */
486 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
487 struct drm_waitlist waitlist; /**< Pending buffers */
488 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
494 struct drm_lock_data {
495 struct drm_hw_lock *hw_lock; /**< Hardware lock */
496 /** Private of lock holder's file (NULL=kernel) */
497 struct drm_file *file_priv;
498 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
499 unsigned long lock_time; /**< Time of last lock in jiffies */
501 uint32_t kernel_waiters;
502 uint32_t user_waiters;
509 struct drm_device_dma {
511 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
512 int buf_count; /**< total number of buffers */
513 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
515 int page_count; /**< number of pages */
516 unsigned long *pagelist; /**< page list */
517 unsigned long byte_count;
519 _DRM_DMA_USE_AGP = 0x01,
520 _DRM_DMA_USE_SG = 0x02,
521 _DRM_DMA_USE_FB = 0x04,
522 _DRM_DMA_USE_PCI_RO = 0x08
528 * AGP memory entry. Stored as a doubly linked list.
531 unsigned long handle; /**< handle */
532 struct agp_memory *memory;
533 unsigned long bound; /**< address */
535 struct list_head head;
541 * \sa drm_agp_init() and drm_device::agp.
543 struct drm_agp_head {
544 struct agp_kern_info agp_info; /**< AGP device information */
545 struct list_head memory;
546 unsigned long mode; /**< AGP mode */
547 struct agp_bridge_data *bridge;
548 int enabled; /**< whether the AGP bus as been enabled */
549 int acquired; /**< whether the AGP device has been acquired */
552 int cant_use_aperture;
553 unsigned long page_mask;
557 * Scatter-gather memory.
560 unsigned long handle;
563 struct page **pagelist;
569 struct drm_hw_lock *lock;
574 * Kernel side of a mapping
576 struct drm_local_map {
577 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
578 unsigned long size; /**< Requested physical size (bytes) */
579 enum drm_map_type type; /**< Type of memory to map */
580 enum drm_map_flags flags; /**< Flags */
581 void *handle; /**< User-space: "Handle" to pass to mmap() */
582 /**< Kernel-space: kernel-virtual address */
583 int mtrr; /**< MTRR slot used */
586 typedef struct drm_local_map drm_local_map_t;
591 struct drm_map_list {
592 struct list_head head; /**< list head */
593 struct drm_hash_item hash;
594 struct drm_local_map *map; /**< mapping */
596 struct drm_master *master;
600 * Context handle list
602 struct drm_ctx_list {
603 struct list_head head; /**< list head */
604 drm_context_t handle; /**< context handle */
605 struct drm_file *tag; /**< associated fd private data */
608 /* location of GART table */
609 #define DRM_ATI_GART_MAIN 1
610 #define DRM_ATI_GART_FB 2
612 #define DRM_ATI_GART_PCI 1
613 #define DRM_ATI_GART_PCIE 2
614 #define DRM_ATI_GART_IGP 3
616 struct drm_ati_pcigart_info {
617 int gart_table_location;
621 dma_addr_t table_mask;
622 struct drm_dma_handle *table_handle;
623 struct drm_local_map mapping;
628 * This structure defines the drm_mm memory object, which will be used by the
629 * DRM for its buffer objects.
631 struct drm_gem_object {
632 /** Reference count of this object */
633 struct kref refcount;
636 * handle_count - gem file_priv handle count of this object
638 * Each handle also holds a reference. Note that when the handle_count
639 * drops to 0 any global names (e.g. the id in the flink namespace) will
642 * Protected by dev->object_name_lock.
644 unsigned handle_count;
646 /** Related drm device */
647 struct drm_device *dev;
649 /** File representing the shmem storage */
652 /* Mapping info for this object */
653 struct drm_vma_offset_node vma_node;
656 * Size of the object, in bytes. Immutable over the object's
662 * Global name for this object, starts at 1. 0 means unnamed.
663 * Access is covered by the object_name_lock in the related drm_device
668 * Memory domains. These monitor which caches contain read/write data
669 * related to the object. When transitioning from one set of domains
670 * to another, the driver is called to ensure that caches are suitably
671 * flushed and invalidated
673 uint32_t read_domains;
674 uint32_t write_domain;
677 * While validating an exec operation, the
678 * new read/write domain values are computed here.
679 * They will be transferred to the above values
680 * at the point that any cache flushing occurs
682 uint32_t pending_read_domains;
683 uint32_t pending_write_domain;
686 * dma_buf - dma buf associated with this GEM object
688 * Pointer to the dma-buf associated with this gem object (either
689 * through importing or exporting). We break the resulting reference
690 * loop when the last gem handle for this object is released.
692 * Protected by obj->object_name_lock
694 struct dma_buf *dma_buf;
697 * import_attach - dma buf attachment backing this object
699 * Any foreign dma_buf imported as a gem object has this set to the
700 * attachment point for the device. This is invariant over the lifetime
703 * The driver's ->gem_free_object callback is responsible for cleaning
704 * up the dma_buf attachment and references acquired at import time.
706 * Note that the drm gem/prime core does not depend upon drivers setting
707 * this field any more. So for drivers where this doesn't make sense
708 * (e.g. virtual devices or a displaylink behind an usb bus) they can
709 * simply leave it as NULL.
711 struct dma_buf_attachment *import_attach;
714 #include <drm/drm_crtc.h>
716 /* per-master structure */
719 struct kref refcount; /* refcount for this master */
721 struct list_head head; /**< each minor contains a list of masters */
722 struct drm_minor *minor; /**< link back to minor we are a master for */
724 char *unique; /**< Unique identifier: e.g., busid */
725 int unique_len; /**< Length of unique field */
726 int unique_size; /**< amount allocated */
728 int blocked; /**< Blocked due to VC switch? */
730 /** \name Authentication */
732 struct drm_open_hash magiclist;
733 struct list_head magicfree;
736 struct drm_lock_data lock; /**< Information on hardware lock */
738 void *driver_priv; /**< Private structure for driver to use */
741 /* Size of ringbuffer for vblank timestamps. Just double-buffer
742 * in initial implementation.
744 #define DRM_VBLANKTIME_RBSIZE 2
746 /* Flags and return codes for get_vblank_timestamp() driver function. */
747 #define DRM_CALLED_FROM_VBLIRQ 1
748 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
749 #define DRM_VBLANKTIME_INVBL (1 << 1)
751 /* get_scanout_position() return flags */
752 #define DRM_SCANOUTPOS_VALID (1 << 0)
753 #define DRM_SCANOUTPOS_INVBL (1 << 1)
754 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
758 int (*get_irq)(struct drm_device *dev);
759 const char *(*get_name)(struct drm_device *dev);
760 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
761 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
762 struct drm_unique *unique);
763 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
767 * DRM driver structure. This structure represent the common code for
768 * a family of cards. There will one drm_device for each card present
772 int (*load) (struct drm_device *, unsigned long flags);
773 int (*firstopen) (struct drm_device *);
774 int (*open) (struct drm_device *, struct drm_file *);
775 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
776 void (*postclose) (struct drm_device *, struct drm_file *);
777 void (*lastclose) (struct drm_device *);
778 int (*unload) (struct drm_device *);
779 int (*suspend) (struct drm_device *, pm_message_t state);
780 int (*resume) (struct drm_device *);
781 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
782 int (*dma_quiescent) (struct drm_device *);
783 int (*context_dtor) (struct drm_device *dev, int context);
786 * get_vblank_counter - get raw hardware vblank counter
788 * @crtc: counter to fetch
790 * Driver callback for fetching a raw hardware vblank counter for @crtc.
791 * If a device doesn't have a hardware counter, the driver can simply
792 * return the value of drm_vblank_count. The DRM core will account for
793 * missed vblank events while interrupts where disabled based on system
796 * Wraparound handling and loss of events due to modesetting is dealt
797 * with in the DRM core code.
800 * Raw vblank counter value.
802 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
805 * enable_vblank - enable vblank interrupt events
807 * @crtc: which irq to enable
809 * Enable vblank interrupts for @crtc. If the device doesn't have
810 * a hardware vblank counter, this routine should be a no-op, since
811 * interrupts will have to stay on to keep the count accurate.
814 * Zero on success, appropriate errno if the given @crtc's vblank
815 * interrupt cannot be enabled.
817 int (*enable_vblank) (struct drm_device *dev, int crtc);
820 * disable_vblank - disable vblank interrupt events
822 * @crtc: which irq to enable
824 * Disable vblank interrupts for @crtc. If the device doesn't have
825 * a hardware vblank counter, this routine should be a no-op, since
826 * interrupts will have to stay on to keep the count accurate.
828 void (*disable_vblank) (struct drm_device *dev, int crtc);
831 * Called by \c drm_device_is_agp. Typically used to determine if a
832 * card is really attached to AGP or not.
834 * \param dev DRM device handle
837 * One of three values is returned depending on whether or not the
838 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
839 * (return of 1), or may or may not be AGP (return of 2).
841 int (*device_is_agp) (struct drm_device *dev);
844 * Called by vblank timestamping code.
846 * Return the current display scanout position from a crtc, and an
847 * optional accurate ktime_get timestamp of when position was measured.
849 * \param dev DRM device.
850 * \param crtc Id of the crtc to query.
851 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
852 * \param *vpos Target location for current vertical scanout position.
853 * \param *hpos Target location for current horizontal scanout position.
854 * \param *stime Target location for timestamp taken immediately before
855 * scanout position query. Can be NULL to skip timestamp.
856 * \param *etime Target location for timestamp taken immediately after
857 * scanout position query. Can be NULL to skip timestamp.
859 * Returns vpos as a positive number while in active scanout area.
860 * Returns vpos as a negative number inside vblank, counting the number
861 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
862 * until start of active scanout / end of vblank."
864 * \return Flags, or'ed together as follows:
866 * DRM_SCANOUTPOS_VALID = Query successful.
867 * DRM_SCANOUTPOS_INVBL = Inside vblank.
868 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
869 * this flag means that returned position may be offset by a constant
870 * but unknown small number of scanlines wrt. real scanout position.
873 int (*get_scanout_position) (struct drm_device *dev, int crtc,
875 int *vpos, int *hpos, ktime_t *stime,
879 * Called by \c drm_get_last_vbltimestamp. Should return a precise
880 * timestamp when the most recent VBLANK interval ended or will end.
882 * Specifically, the timestamp in @vblank_time should correspond as
883 * closely as possible to the time when the first video scanline of
884 * the video frame after the end of VBLANK will start scanning out,
885 * the time immediately after end of the VBLANK interval. If the
886 * @crtc is currently inside VBLANK, this will be a time in the future.
887 * If the @crtc is currently scanning out a frame, this will be the
888 * past start time of the current scanout. This is meant to adhere
889 * to the OpenML OML_sync_control extension specification.
891 * \param dev dev DRM device handle.
892 * \param crtc crtc for which timestamp should be returned.
893 * \param *max_error Maximum allowable timestamp error in nanoseconds.
894 * Implementation should strive to provide timestamp
895 * with an error of at most *max_error nanoseconds.
896 * Returns true upper bound on error for timestamp.
897 * \param *vblank_time Target location for returned vblank timestamp.
898 * \param flags 0 = Defaults, no special treatment needed.
899 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
900 * irq handler. Some drivers need to apply some workarounds
901 * for gpu-specific vblank irq quirks if flag is set.
904 * Zero if timestamping isn't supported in current display mode or a
905 * negative number on failure. A positive status code on success,
906 * which describes how the vblank_time timestamp was computed.
908 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
910 struct timeval *vblank_time,
913 /* these have to be filled in */
915 irqreturn_t(*irq_handler) (int irq, void *arg);
916 void (*irq_preinstall) (struct drm_device *dev);
917 int (*irq_postinstall) (struct drm_device *dev);
918 void (*irq_uninstall) (struct drm_device *dev);
920 /* Master routines */
921 int (*master_create)(struct drm_device *dev, struct drm_master *master);
922 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
924 * master_set is called whenever the minor master is set.
925 * master_drop is called whenever the minor master is dropped.
928 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
930 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
933 int (*debugfs_init)(struct drm_minor *minor);
934 void (*debugfs_cleanup)(struct drm_minor *minor);
937 * Driver-specific constructor for drm_gem_objects, to set up
938 * obj->driver_private.
940 * Returns 0 on success.
942 void (*gem_free_object) (struct drm_gem_object *obj);
943 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
944 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
947 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
948 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
949 uint32_t handle, uint32_t flags, int *prime_fd);
950 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
951 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
952 int prime_fd, uint32_t *handle);
953 /* export GEM -> dmabuf */
954 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
955 struct drm_gem_object *obj, int flags);
956 /* import dmabuf -> GEM */
957 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
958 struct dma_buf *dma_buf);
959 /* low-level interface used by drm_gem_prime_{import,export} */
960 int (*gem_prime_pin)(struct drm_gem_object *obj);
961 void (*gem_prime_unpin)(struct drm_gem_object *obj);
962 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
963 struct drm_gem_object *(*gem_prime_import_sg_table)(
964 struct drm_device *dev, size_t size,
965 struct sg_table *sgt);
966 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
967 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
968 int (*gem_prime_mmap)(struct drm_gem_object *obj,
969 struct vm_area_struct *vma);
971 /* vga arb irq handler */
972 void (*vgaarb_irq)(struct drm_device *dev, bool state);
974 /* dumb alloc support */
975 int (*dumb_create)(struct drm_file *file_priv,
976 struct drm_device *dev,
977 struct drm_mode_create_dumb *args);
978 int (*dumb_map_offset)(struct drm_file *file_priv,
979 struct drm_device *dev, uint32_t handle,
981 int (*dumb_destroy)(struct drm_file *file_priv,
982 struct drm_device *dev,
985 /* Driver private ops for this object */
986 const struct vm_operations_struct *gem_vm_ops;
997 const struct drm_ioctl_desc *ioctls;
999 const struct file_operations *fops;
1001 struct pci_driver *pci;
1002 struct platform_device *platform_device;
1003 struct usb_driver *usb;
1005 struct drm_bus *bus;
1007 /* List of devices hanging off this driver with stealth attach. */
1008 struct list_head legacy_dev_list;
1011 #define DRM_MINOR_UNASSIGNED 0
1012 #define DRM_MINOR_LEGACY 1
1013 #define DRM_MINOR_CONTROL 2
1014 #define DRM_MINOR_RENDER 3
1017 * Info file list entry. This structure represents a debugfs or proc file to
1018 * be created by the drm core
1020 struct drm_info_list {
1021 const char *name; /** file name */
1022 int (*show)(struct seq_file*, void*); /** show callback */
1023 u32 driver_features; /**< Required driver features for this entry */
1028 * debugfs node structure. This structure represents a debugfs file.
1030 struct drm_info_node {
1031 struct list_head list;
1032 struct drm_minor *minor;
1033 const struct drm_info_list *info_ent;
1034 struct dentry *dent;
1038 * DRM minor structure. This structure represents a drm minor number.
1041 int index; /**< Minor device number */
1042 int type; /**< Control or render */
1043 dev_t device; /**< Device number for mknod */
1044 struct device *kdev; /**< Linux device */
1045 struct drm_device *dev;
1047 struct dentry *debugfs_root;
1049 struct list_head debugfs_list;
1050 struct mutex debugfs_lock; /* Protects debugfs_list. */
1052 struct drm_master *master; /* currently active master for this node */
1053 struct list_head master_list;
1054 struct drm_mode_group mode_group;
1057 /* mode specified on the command line */
1058 struct drm_cmdline_mode {
1060 bool refresh_specified;
1069 enum drm_connector_force force;
1073 struct drm_pending_vblank_event {
1074 struct drm_pending_event base;
1076 struct drm_event_vblank event;
1079 struct drm_vblank_crtc {
1080 wait_queue_head_t queue; /**< VBLANK wait queue */
1081 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1082 atomic_t count; /**< number of VBLANK interrupts */
1083 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1084 u32 last; /* protected by dev->vbl_lock, used */
1085 /* for wraparound handling */
1086 u32 last_wait; /* Last vblank seqno waited per CRTC */
1087 unsigned int inmodeset; /* Display driver is setting mode */
1088 bool enabled; /* so we don't call enable more than
1093 * DRM device structure. This structure represent a complete card that
1094 * may contain multiple heads.
1097 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1098 char *devname; /**< For /proc/interrupts */
1099 int if_version; /**< Highest interface version set */
1103 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1104 struct mutex struct_mutex; /**< For others */
1107 /** \name Usage Counters */
1109 int open_count; /**< Outstanding files open */
1110 int buf_use; /**< Buffers in use -- cannot alloc */
1111 atomic_t buf_alloc; /**< Buffer allocation in progress */
1114 struct list_head filelist;
1116 /** \name Memory management */
1118 struct list_head maplist; /**< Linked list of regions */
1119 struct drm_open_hash map_hash; /**< User token hash table for maps */
1121 /** \name Context handle management */
1123 struct list_head ctxlist; /**< Linked list of context handles */
1124 struct mutex ctxlist_mutex; /**< For ctxlist */
1128 struct list_head vmalist; /**< List of vmas (for debugging) */
1132 /** \name DMA support */
1134 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1137 /** \name Context support */
1139 bool irq_enabled; /**< True if irq handler is enabled */
1142 __volatile__ long context_flag; /**< Context swapping flag */
1143 int last_context; /**< Last current context */
1146 /** \name VBLANK IRQ support */
1150 * At load time, disabling the vblank interrupt won't be allowed since
1151 * old clients may not call the modeset ioctl and therefore misbehave.
1152 * Once the modeset ioctl *has* been called though, we can safely
1153 * disable them when unused.
1155 bool vblank_disable_allowed;
1157 /* array of size num_crtcs */
1158 struct drm_vblank_crtc *vblank;
1160 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1161 spinlock_t vbl_lock;
1162 struct timer_list vblank_disable_timer;
1164 u32 max_vblank_count; /**< size of vblank counter register */
1169 struct list_head vblank_event_list;
1170 spinlock_t event_lock;
1174 struct drm_agp_head *agp; /**< AGP data */
1176 struct device *dev; /**< Device structure */
1177 struct pci_dev *pdev; /**< PCI device structure */
1179 struct pci_controller *hose;
1182 struct platform_device *platformdev; /**< Platform device struture */
1183 struct usb_device *usbdev;
1185 struct drm_sg_mem *sg; /**< Scatter gather memory */
1186 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1187 void *dev_private; /**< device private data */
1188 struct inode *anon_inode;
1189 struct drm_sigdata sigdata; /**< For block_all_signals */
1192 struct drm_driver *driver;
1193 struct drm_local_map *agp_buffer_map;
1194 unsigned int agp_buffer_token;
1195 struct drm_minor *control; /**< Control node for card */
1196 struct drm_minor *primary; /**< render type primary screen head */
1197 struct drm_minor *render; /**< render node for card */
1199 struct drm_mode_config mode_config; /**< Current mode config */
1201 /** \name GEM information */
1203 struct mutex object_name_lock;
1204 struct idr object_name_idr;
1205 struct drm_vma_offset_manager *vma_offset_manager;
1207 int switch_power_state;
1209 atomic_t unplugged; /* device has been unplugged or gone away */
1212 #define DRM_SWITCH_POWER_ON 0
1213 #define DRM_SWITCH_POWER_OFF 1
1214 #define DRM_SWITCH_POWER_CHANGING 2
1215 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1217 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1220 return ((dev->driver->driver_features & feature) ? 1 : 0);
1223 static inline int drm_dev_to_irq(struct drm_device *dev)
1225 return dev->driver->bus->get_irq(dev);
1228 static inline void drm_device_set_unplugged(struct drm_device *dev)
1231 atomic_set(&dev->unplugged, 1);
1234 static inline int drm_device_is_unplugged(struct drm_device *dev)
1236 int ret = atomic_read(&dev->unplugged);
1241 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1243 return mutex_is_locked(&dev->mode_config.mutex);
1246 static inline bool drm_is_render_client(const struct drm_file *file_priv)
1248 return file_priv->minor->type == DRM_MINOR_RENDER;
1251 static inline bool drm_is_control_client(const struct drm_file *file_priv)
1253 return file_priv->minor->type == DRM_MINOR_CONTROL;
1256 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1258 return file_priv->minor->type == DRM_MINOR_LEGACY;
1261 /******************************************************************/
1262 /** \name Internal function definitions */
1265 /* Driver support (drm_drv.h) */
1266 extern long drm_ioctl(struct file *filp,
1267 unsigned int cmd, unsigned long arg);
1268 extern long drm_compat_ioctl(struct file *filp,
1269 unsigned int cmd, unsigned long arg);
1270 extern int drm_lastclose(struct drm_device *dev);
1272 /* Device support (drm_fops.h) */
1273 extern struct mutex drm_global_mutex;
1274 extern int drm_open(struct inode *inode, struct file *filp);
1275 extern int drm_stub_open(struct inode *inode, struct file *filp);
1276 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1277 size_t count, loff_t *offset);
1278 extern int drm_release(struct inode *inode, struct file *filp);
1280 /* Mapping support (drm_vm.h) */
1281 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1282 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1283 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1284 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1285 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1287 /* Memory management support (drm_memory.h) */
1288 #include <drm/drm_memory.h>
1291 /* Misc. IOCTL support (drm_ioctl.h) */
1292 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1293 struct drm_file *file_priv);
1294 extern int drm_getunique(struct drm_device *dev, void *data,
1295 struct drm_file *file_priv);
1296 extern int drm_setunique(struct drm_device *dev, void *data,
1297 struct drm_file *file_priv);
1298 extern int drm_getmap(struct drm_device *dev, void *data,
1299 struct drm_file *file_priv);
1300 extern int drm_getclient(struct drm_device *dev, void *data,
1301 struct drm_file *file_priv);
1302 extern int drm_getstats(struct drm_device *dev, void *data,
1303 struct drm_file *file_priv);
1304 extern int drm_getcap(struct drm_device *dev, void *data,
1305 struct drm_file *file_priv);
1306 extern int drm_setclientcap(struct drm_device *dev, void *data,
1307 struct drm_file *file_priv);
1308 extern int drm_setversion(struct drm_device *dev, void *data,
1309 struct drm_file *file_priv);
1310 extern int drm_noop(struct drm_device *dev, void *data,
1311 struct drm_file *file_priv);
1313 /* Context IOCTL support (drm_context.h) */
1314 extern int drm_resctx(struct drm_device *dev, void *data,
1315 struct drm_file *file_priv);
1316 extern int drm_addctx(struct drm_device *dev, void *data,
1317 struct drm_file *file_priv);
1318 extern int drm_getctx(struct drm_device *dev, void *data,
1319 struct drm_file *file_priv);
1320 extern int drm_switchctx(struct drm_device *dev, void *data,
1321 struct drm_file *file_priv);
1322 extern int drm_newctx(struct drm_device *dev, void *data,
1323 struct drm_file *file_priv);
1324 extern int drm_rmctx(struct drm_device *dev, void *data,
1325 struct drm_file *file_priv);
1327 extern int drm_ctxbitmap_init(struct drm_device *dev);
1328 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1329 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1331 extern int drm_setsareactx(struct drm_device *dev, void *data,
1332 struct drm_file *file_priv);
1333 extern int drm_getsareactx(struct drm_device *dev, void *data,
1334 struct drm_file *file_priv);
1336 /* Authentication IOCTL support (drm_auth.h) */
1337 extern int drm_getmagic(struct drm_device *dev, void *data,
1338 struct drm_file *file_priv);
1339 extern int drm_authmagic(struct drm_device *dev, void *data,
1340 struct drm_file *file_priv);
1341 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1343 /* Cache management (drm_cache.c) */
1344 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1345 void drm_clflush_sg(struct sg_table *st);
1346 void drm_clflush_virt_range(char *addr, unsigned long length);
1348 /* Locking IOCTL support (drm_lock.h) */
1349 extern int drm_lock(struct drm_device *dev, void *data,
1350 struct drm_file *file_priv);
1351 extern int drm_unlock(struct drm_device *dev, void *data,
1352 struct drm_file *file_priv);
1353 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1354 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1355 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1358 * These are exported to drivers so that they can implement fencing using
1359 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1362 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1364 /* Buffer management support (drm_bufs.h) */
1365 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1366 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1367 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1368 unsigned int size, enum drm_map_type type,
1369 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1370 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1371 struct drm_file *file_priv);
1372 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1373 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1374 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1375 struct drm_file *file_priv);
1376 extern int drm_addbufs(struct drm_device *dev, void *data,
1377 struct drm_file *file_priv);
1378 extern int drm_infobufs(struct drm_device *dev, void *data,
1379 struct drm_file *file_priv);
1380 extern int drm_markbufs(struct drm_device *dev, void *data,
1381 struct drm_file *file_priv);
1382 extern int drm_freebufs(struct drm_device *dev, void *data,
1383 struct drm_file *file_priv);
1384 extern int drm_mapbufs(struct drm_device *dev, void *data,
1385 struct drm_file *file_priv);
1386 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1387 struct drm_file *file_priv);
1389 /* DMA support (drm_dma.h) */
1390 extern int drm_legacy_dma_setup(struct drm_device *dev);
1391 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1392 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1393 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1394 struct drm_file *filp);
1396 /* IRQ support (drm_irq.h) */
1397 extern int drm_control(struct drm_device *dev, void *data,
1398 struct drm_file *file_priv);
1399 extern int drm_irq_install(struct drm_device *dev);
1400 extern int drm_irq_uninstall(struct drm_device *dev);
1402 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1403 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1404 struct drm_file *filp);
1405 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1406 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1407 struct timeval *vblanktime);
1408 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1409 struct drm_pending_vblank_event *e);
1410 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1411 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1412 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1413 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1414 extern void drm_vblank_cleanup(struct drm_device *dev);
1415 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1416 struct timeval *tvblank, unsigned flags);
1417 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1418 int crtc, int *max_error,
1419 struct timeval *vblank_time,
1421 const struct drm_crtc *refcrtc,
1422 const struct drm_display_mode *mode);
1423 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1424 const struct drm_display_mode *mode);
1427 drm_mode_parse_command_line_for_connector(const char *mode_option,
1428 struct drm_connector *connector,
1429 struct drm_cmdline_mode *mode);
1431 extern struct drm_display_mode *
1432 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1433 struct drm_cmdline_mode *cmd);
1435 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1436 struct drm_display_mode *dmode);
1437 extern int of_get_drm_display_mode(struct device_node *np,
1438 struct drm_display_mode *dmode,
1441 /* Modesetting support */
1442 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1443 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1444 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1445 struct drm_file *file_priv);
1447 /* AGP/GART support (drm_agpsupport.h) */
1449 #include <drm/drm_agpsupport.h>
1451 /* Stub support (drm_stub.h) */
1452 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1453 struct drm_file *file_priv);
1454 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1455 struct drm_file *file_priv);
1456 struct drm_master *drm_master_create(struct drm_minor *minor);
1457 extern struct drm_master *drm_master_get(struct drm_master *master);
1458 extern void drm_master_put(struct drm_master **master);
1460 extern void drm_put_dev(struct drm_device *dev);
1461 extern void drm_unplug_dev(struct drm_device *dev);
1462 extern unsigned int drm_debug;
1463 extern unsigned int drm_rnodes;
1465 extern unsigned int drm_vblank_offdelay;
1466 extern unsigned int drm_timestamp_precision;
1467 extern unsigned int drm_timestamp_monotonic;
1469 extern struct class *drm_class;
1470 extern struct dentry *drm_debugfs_root;
1472 extern struct idr drm_minors_idr;
1474 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1476 /* Debugfs support */
1477 #if defined(CONFIG_DEBUG_FS)
1478 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1479 struct dentry *root);
1480 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1481 int count, struct dentry *root,
1482 struct drm_minor *minor);
1483 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1484 int count, struct drm_minor *minor);
1485 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1487 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1488 struct dentry *root)
1493 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1494 int count, struct dentry *root,
1495 struct drm_minor *minor)
1500 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1501 int count, struct drm_minor *minor)
1506 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1512 /* Info file support */
1513 extern int drm_name_info(struct seq_file *m, void *data);
1514 extern int drm_vm_info(struct seq_file *m, void *data);
1515 extern int drm_bufs_info(struct seq_file *m, void *data);
1516 extern int drm_vblank_info(struct seq_file *m, void *data);
1517 extern int drm_clients_info(struct seq_file *m, void* data);
1518 extern int drm_gem_name_info(struct seq_file *m, void *data);
1521 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1522 struct drm_gem_object *obj, int flags);
1523 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1524 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1526 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1527 struct dma_buf *dma_buf);
1528 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1529 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1530 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1532 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1533 struct drm_file *file_priv);
1534 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1535 struct drm_file *file_priv);
1537 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1538 dma_addr_t *addrs, int max_pages);
1539 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1540 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1542 int drm_gem_dumb_destroy(struct drm_file *file,
1543 struct drm_device *dev,
1546 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1547 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1548 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1551 extern int drm_vma_info(struct seq_file *m, void *data);
1554 /* Scatter Gather Support (drm_scatter.h) */
1555 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1556 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1557 struct drm_file *file_priv);
1558 extern int drm_sg_free(struct drm_device *dev, void *data,
1559 struct drm_file *file_priv);
1561 /* ATI PCIGART support (ati_pcigart.h) */
1562 extern int drm_ati_pcigart_init(struct drm_device *dev,
1563 struct drm_ati_pcigart_info * gart_info);
1564 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1565 struct drm_ati_pcigart_info * gart_info);
1567 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1569 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1570 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1572 /* sysfs support (drm_sysfs.c) */
1573 struct drm_sysfs_class;
1574 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1575 extern void drm_sysfs_destroy(void);
1576 extern int drm_sysfs_device_add(struct drm_minor *minor);
1577 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1578 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1579 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1580 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1582 /* Graphics Execution Manager library functions (drm_gem.c) */
1583 int drm_gem_init(struct drm_device *dev);
1584 void drm_gem_destroy(struct drm_device *dev);
1585 void drm_gem_object_release(struct drm_gem_object *obj);
1586 void drm_gem_object_free(struct kref *kref);
1587 int drm_gem_object_init(struct drm_device *dev,
1588 struct drm_gem_object *obj, size_t size);
1589 void drm_gem_private_object_init(struct drm_device *dev,
1590 struct drm_gem_object *obj, size_t size);
1591 void drm_gem_vm_open(struct vm_area_struct *vma);
1592 void drm_gem_vm_close(struct vm_area_struct *vma);
1593 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1594 struct vm_area_struct *vma);
1595 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1597 #include <drm/drm_global.h>
1600 drm_gem_object_reference(struct drm_gem_object *obj)
1602 kref_get(&obj->refcount);
1606 drm_gem_object_unreference(struct drm_gem_object *obj)
1609 kref_put(&obj->refcount, drm_gem_object_free);
1613 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1615 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1616 struct drm_device *dev = obj->dev;
1618 mutex_lock(&dev->struct_mutex);
1619 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1620 drm_gem_object_free(&obj->refcount);
1621 mutex_unlock(&dev->struct_mutex);
1625 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1626 struct drm_gem_object *obj,
1628 int drm_gem_handle_create(struct drm_file *file_priv,
1629 struct drm_gem_object *obj,
1631 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1634 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1635 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1636 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1638 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1639 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1640 bool dirty, bool accessed);
1642 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1643 struct drm_file *filp,
1645 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1646 struct drm_file *file_priv);
1647 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1648 struct drm_file *file_priv);
1649 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1650 struct drm_file *file_priv);
1651 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1652 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1654 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1655 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1656 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1658 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1661 struct drm_map_list *_entry;
1662 list_for_each_entry(_entry, &dev->maplist, head)
1663 if (_entry->user_token == token)
1668 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1672 #include <drm/drm_mem_util.h>
1674 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1675 struct device *parent);
1676 void drm_dev_free(struct drm_device *dev);
1677 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1678 void drm_dev_unregister(struct drm_device *dev);
1680 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
1681 void drm_minor_release(struct drm_minor *minor);
1686 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1688 if (dev->driver->device_is_agp != NULL) {
1689 int err = (*dev->driver->device_is_agp) (dev);
1696 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1698 void drm_pci_agp_destroy(struct drm_device *dev);
1700 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1701 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1702 extern int drm_get_pci_dev(struct pci_dev *pdev,
1703 const struct pci_device_id *ent,
1704 struct drm_driver *driver);
1706 #define DRM_PCIE_SPEED_25 1
1707 #define DRM_PCIE_SPEED_50 2
1708 #define DRM_PCIE_SPEED_80 4
1710 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1712 /* platform section */
1713 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1715 /* returns true if currently okay to sleep */
1716 static __inline__ bool drm_can_sleep(void)
1718 if (in_atomic() || in_dbg_master() || irqs_disabled())
1723 #endif /* __KERNEL__ */