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 struct list_head lhead;
442 struct drm_minor *minor;
443 unsigned long lock_count;
445 /** Mapping of mm object handles to object pointers. */
446 struct idr object_idr;
447 /** Lock for synchronization of access to object_idr. */
448 spinlock_t table_lock;
453 struct drm_master *master; /* master this node is currently associated with
454 N.B. not always minor->master */
456 * fbs - List of framebuffers associated with this file.
458 * Protected by fbs_lock. Note that the fbs list holds a reference on
459 * the fb object to prevent it from untimely disappearing.
461 struct list_head fbs;
462 struct mutex fbs_lock;
464 wait_queue_head_t event_wait;
465 struct list_head event_list;
468 struct drm_prime_file_private prime;
473 atomic_t use_count; /**< Outstanding uses (+1) */
474 atomic_t finalization; /**< Finalization in progress */
475 atomic_t block_count; /**< Count of processes waiting */
476 atomic_t block_read; /**< Queue blocked for reads */
477 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
478 atomic_t block_write; /**< Queue blocked for writes */
479 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
480 atomic_t total_queued; /**< Total queued statistic */
481 atomic_t total_flushed; /**< Total flushes statistic */
482 atomic_t total_locks; /**< Total locks statistics */
483 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
484 struct drm_waitlist waitlist; /**< Pending buffers */
485 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
491 struct drm_lock_data {
492 struct drm_hw_lock *hw_lock; /**< Hardware lock */
493 /** Private of lock holder's file (NULL=kernel) */
494 struct drm_file *file_priv;
495 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
496 unsigned long lock_time; /**< Time of last lock in jiffies */
498 uint32_t kernel_waiters;
499 uint32_t user_waiters;
506 struct drm_device_dma {
508 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
509 int buf_count; /**< total number of buffers */
510 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
512 int page_count; /**< number of pages */
513 unsigned long *pagelist; /**< page list */
514 unsigned long byte_count;
516 _DRM_DMA_USE_AGP = 0x01,
517 _DRM_DMA_USE_SG = 0x02,
518 _DRM_DMA_USE_FB = 0x04,
519 _DRM_DMA_USE_PCI_RO = 0x08
525 * AGP memory entry. Stored as a doubly linked list.
528 unsigned long handle; /**< handle */
529 struct agp_memory *memory;
530 unsigned long bound; /**< address */
532 struct list_head head;
538 * \sa drm_agp_init() and drm_device::agp.
540 struct drm_agp_head {
541 struct agp_kern_info agp_info; /**< AGP device information */
542 struct list_head memory;
543 unsigned long mode; /**< AGP mode */
544 struct agp_bridge_data *bridge;
545 int enabled; /**< whether the AGP bus as been enabled */
546 int acquired; /**< whether the AGP device has been acquired */
549 int cant_use_aperture;
550 unsigned long page_mask;
554 * Scatter-gather memory.
557 unsigned long handle;
560 struct page **pagelist;
566 struct drm_hw_lock *lock;
571 * Kernel side of a mapping
573 struct drm_local_map {
574 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
575 unsigned long size; /**< Requested physical size (bytes) */
576 enum drm_map_type type; /**< Type of memory to map */
577 enum drm_map_flags flags; /**< Flags */
578 void *handle; /**< User-space: "Handle" to pass to mmap() */
579 /**< Kernel-space: kernel-virtual address */
580 int mtrr; /**< MTRR slot used */
583 typedef struct drm_local_map drm_local_map_t;
588 struct drm_map_list {
589 struct list_head head; /**< list head */
590 struct drm_hash_item hash;
591 struct drm_local_map *map; /**< mapping */
593 struct drm_master *master;
597 * Context handle list
599 struct drm_ctx_list {
600 struct list_head head; /**< list head */
601 drm_context_t handle; /**< context handle */
602 struct drm_file *tag; /**< associated fd private data */
605 /* location of GART table */
606 #define DRM_ATI_GART_MAIN 1
607 #define DRM_ATI_GART_FB 2
609 #define DRM_ATI_GART_PCI 1
610 #define DRM_ATI_GART_PCIE 2
611 #define DRM_ATI_GART_IGP 3
613 struct drm_ati_pcigart_info {
614 int gart_table_location;
618 dma_addr_t table_mask;
619 struct drm_dma_handle *table_handle;
620 struct drm_local_map mapping;
625 * This structure defines the drm_mm memory object, which will be used by the
626 * DRM for its buffer objects.
628 struct drm_gem_object {
629 /** Reference count of this object */
630 struct kref refcount;
633 * handle_count - gem file_priv handle count of this object
635 * Each handle also holds a reference. Note that when the handle_count
636 * drops to 0 any global names (e.g. the id in the flink namespace) will
639 * Protected by dev->object_name_lock.
641 unsigned handle_count;
643 /** Related drm device */
644 struct drm_device *dev;
646 /** File representing the shmem storage */
649 /* Mapping info for this object */
650 struct drm_vma_offset_node vma_node;
653 * Size of the object, in bytes. Immutable over the object's
659 * Global name for this object, starts at 1. 0 means unnamed.
660 * Access is covered by the object_name_lock in the related drm_device
665 * Memory domains. These monitor which caches contain read/write data
666 * related to the object. When transitioning from one set of domains
667 * to another, the driver is called to ensure that caches are suitably
668 * flushed and invalidated
670 uint32_t read_domains;
671 uint32_t write_domain;
674 * While validating an exec operation, the
675 * new read/write domain values are computed here.
676 * They will be transferred to the above values
677 * at the point that any cache flushing occurs
679 uint32_t pending_read_domains;
680 uint32_t pending_write_domain;
683 * dma_buf - dma buf associated with this GEM object
685 * Pointer to the dma-buf associated with this gem object (either
686 * through importing or exporting). We break the resulting reference
687 * loop when the last gem handle for this object is released.
689 * Protected by obj->object_name_lock
691 struct dma_buf *dma_buf;
694 * import_attach - dma buf attachment backing this object
696 * Any foreign dma_buf imported as a gem object has this set to the
697 * attachment point for the device. This is invariant over the lifetime
700 * The driver's ->gem_free_object callback is responsible for cleaning
701 * up the dma_buf attachment and references acquired at import time.
703 * Note that the drm gem/prime core does not depend upon drivers setting
704 * this field any more. So for drivers where this doesn't make sense
705 * (e.g. virtual devices or a displaylink behind an usb bus) they can
706 * simply leave it as NULL.
708 struct dma_buf_attachment *import_attach;
711 #include <drm/drm_crtc.h>
713 /* per-master structure */
716 struct kref refcount; /* refcount for this master */
718 struct list_head head; /**< each minor contains a list of masters */
719 struct drm_minor *minor; /**< link back to minor we are a master for */
721 char *unique; /**< Unique identifier: e.g., busid */
722 int unique_len; /**< Length of unique field */
723 int unique_size; /**< amount allocated */
725 int blocked; /**< Blocked due to VC switch? */
727 /** \name Authentication */
729 struct drm_open_hash magiclist;
730 struct list_head magicfree;
733 struct drm_lock_data lock; /**< Information on hardware lock */
735 void *driver_priv; /**< Private structure for driver to use */
738 /* Size of ringbuffer for vblank timestamps. Just double-buffer
739 * in initial implementation.
741 #define DRM_VBLANKTIME_RBSIZE 2
743 /* Flags and return codes for get_vblank_timestamp() driver function. */
744 #define DRM_CALLED_FROM_VBLIRQ 1
745 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
746 #define DRM_VBLANKTIME_INVBL (1 << 1)
748 /* get_scanout_position() return flags */
749 #define DRM_SCANOUTPOS_VALID (1 << 0)
750 #define DRM_SCANOUTPOS_INVBL (1 << 1)
751 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
755 int (*get_irq)(struct drm_device *dev);
756 const char *(*get_name)(struct drm_device *dev);
757 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
758 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
759 struct drm_unique *unique);
760 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
764 * DRM driver structure. This structure represent the common code for
765 * a family of cards. There will one drm_device for each card present
769 int (*load) (struct drm_device *, unsigned long flags);
770 int (*firstopen) (struct drm_device *);
771 int (*open) (struct drm_device *, struct drm_file *);
772 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
773 void (*postclose) (struct drm_device *, struct drm_file *);
774 void (*lastclose) (struct drm_device *);
775 int (*unload) (struct drm_device *);
776 int (*suspend) (struct drm_device *, pm_message_t state);
777 int (*resume) (struct drm_device *);
778 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
779 int (*dma_quiescent) (struct drm_device *);
780 int (*context_dtor) (struct drm_device *dev, int context);
783 * get_vblank_counter - get raw hardware vblank counter
785 * @crtc: counter to fetch
787 * Driver callback for fetching a raw hardware vblank counter for @crtc.
788 * If a device doesn't have a hardware counter, the driver can simply
789 * return the value of drm_vblank_count. The DRM core will account for
790 * missed vblank events while interrupts where disabled based on system
793 * Wraparound handling and loss of events due to modesetting is dealt
794 * with in the DRM core code.
797 * Raw vblank counter value.
799 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
802 * enable_vblank - enable vblank interrupt events
804 * @crtc: which irq to enable
806 * Enable vblank interrupts for @crtc. If the device doesn't have
807 * a hardware vblank counter, this routine should be a no-op, since
808 * interrupts will have to stay on to keep the count accurate.
811 * Zero on success, appropriate errno if the given @crtc's vblank
812 * interrupt cannot be enabled.
814 int (*enable_vblank) (struct drm_device *dev, int crtc);
817 * disable_vblank - disable vblank interrupt events
819 * @crtc: which irq to enable
821 * Disable vblank interrupts for @crtc. If the device doesn't have
822 * a hardware vblank counter, this routine should be a no-op, since
823 * interrupts will have to stay on to keep the count accurate.
825 void (*disable_vblank) (struct drm_device *dev, int crtc);
828 * Called by \c drm_device_is_agp. Typically used to determine if a
829 * card is really attached to AGP or not.
831 * \param dev DRM device handle
834 * One of three values is returned depending on whether or not the
835 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
836 * (return of 1), or may or may not be AGP (return of 2).
838 int (*device_is_agp) (struct drm_device *dev);
841 * Called by vblank timestamping code.
843 * Return the current display scanout position from a crtc, and an
844 * optional accurate ktime_get timestamp of when position was measured.
846 * \param dev DRM device.
847 * \param crtc Id of the crtc to query.
848 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
849 * \param *vpos Target location for current vertical scanout position.
850 * \param *hpos Target location for current horizontal scanout position.
851 * \param *stime Target location for timestamp taken immediately before
852 * scanout position query. Can be NULL to skip timestamp.
853 * \param *etime Target location for timestamp taken immediately after
854 * scanout position query. Can be NULL to skip timestamp.
856 * Returns vpos as a positive number while in active scanout area.
857 * Returns vpos as a negative number inside vblank, counting the number
858 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
859 * until start of active scanout / end of vblank."
861 * \return Flags, or'ed together as follows:
863 * DRM_SCANOUTPOS_VALID = Query successful.
864 * DRM_SCANOUTPOS_INVBL = Inside vblank.
865 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
866 * this flag means that returned position may be offset by a constant
867 * but unknown small number of scanlines wrt. real scanout position.
870 int (*get_scanout_position) (struct drm_device *dev, int crtc,
872 int *vpos, int *hpos, ktime_t *stime,
876 * Called by \c drm_get_last_vbltimestamp. Should return a precise
877 * timestamp when the most recent VBLANK interval ended or will end.
879 * Specifically, the timestamp in @vblank_time should correspond as
880 * closely as possible to the time when the first video scanline of
881 * the video frame after the end of VBLANK will start scanning out,
882 * the time immediately after end of the VBLANK interval. If the
883 * @crtc is currently inside VBLANK, this will be a time in the future.
884 * If the @crtc is currently scanning out a frame, this will be the
885 * past start time of the current scanout. This is meant to adhere
886 * to the OpenML OML_sync_control extension specification.
888 * \param dev dev DRM device handle.
889 * \param crtc crtc for which timestamp should be returned.
890 * \param *max_error Maximum allowable timestamp error in nanoseconds.
891 * Implementation should strive to provide timestamp
892 * with an error of at most *max_error nanoseconds.
893 * Returns true upper bound on error for timestamp.
894 * \param *vblank_time Target location for returned vblank timestamp.
895 * \param flags 0 = Defaults, no special treatment needed.
896 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
897 * irq handler. Some drivers need to apply some workarounds
898 * for gpu-specific vblank irq quirks if flag is set.
901 * Zero if timestamping isn't supported in current display mode or a
902 * negative number on failure. A positive status code on success,
903 * which describes how the vblank_time timestamp was computed.
905 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
907 struct timeval *vblank_time,
910 /* these have to be filled in */
912 irqreturn_t(*irq_handler) (int irq, void *arg);
913 void (*irq_preinstall) (struct drm_device *dev);
914 int (*irq_postinstall) (struct drm_device *dev);
915 void (*irq_uninstall) (struct drm_device *dev);
917 /* Master routines */
918 int (*master_create)(struct drm_device *dev, struct drm_master *master);
919 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
921 * master_set is called whenever the minor master is set.
922 * master_drop is called whenever the minor master is dropped.
925 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
927 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
930 int (*debugfs_init)(struct drm_minor *minor);
931 void (*debugfs_cleanup)(struct drm_minor *minor);
934 * Driver-specific constructor for drm_gem_objects, to set up
935 * obj->driver_private.
937 * Returns 0 on success.
939 void (*gem_free_object) (struct drm_gem_object *obj);
940 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
941 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
944 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
945 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
946 uint32_t handle, uint32_t flags, int *prime_fd);
947 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
948 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
949 int prime_fd, uint32_t *handle);
950 /* export GEM -> dmabuf */
951 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
952 struct drm_gem_object *obj, int flags);
953 /* import dmabuf -> GEM */
954 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
955 struct dma_buf *dma_buf);
956 /* low-level interface used by drm_gem_prime_{import,export} */
957 int (*gem_prime_pin)(struct drm_gem_object *obj);
958 void (*gem_prime_unpin)(struct drm_gem_object *obj);
959 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
960 struct drm_gem_object *(*gem_prime_import_sg_table)(
961 struct drm_device *dev, size_t size,
962 struct sg_table *sgt);
963 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
964 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
965 int (*gem_prime_mmap)(struct drm_gem_object *obj,
966 struct vm_area_struct *vma);
968 /* vga arb irq handler */
969 void (*vgaarb_irq)(struct drm_device *dev, bool state);
971 /* dumb alloc support */
972 int (*dumb_create)(struct drm_file *file_priv,
973 struct drm_device *dev,
974 struct drm_mode_create_dumb *args);
975 int (*dumb_map_offset)(struct drm_file *file_priv,
976 struct drm_device *dev, uint32_t handle,
978 int (*dumb_destroy)(struct drm_file *file_priv,
979 struct drm_device *dev,
982 /* Driver private ops for this object */
983 const struct vm_operations_struct *gem_vm_ops;
994 const struct drm_ioctl_desc *ioctls;
996 const struct file_operations *fops;
998 struct pci_driver *pci;
999 struct platform_device *platform_device;
1000 struct usb_driver *usb;
1002 struct drm_bus *bus;
1004 /* List of devices hanging off this driver with stealth attach. */
1005 struct list_head legacy_dev_list;
1008 #define DRM_MINOR_UNASSIGNED 0
1009 #define DRM_MINOR_LEGACY 1
1010 #define DRM_MINOR_CONTROL 2
1011 #define DRM_MINOR_RENDER 3
1014 * Info file list entry. This structure represents a debugfs or proc file to
1015 * be created by the drm core
1017 struct drm_info_list {
1018 const char *name; /** file name */
1019 int (*show)(struct seq_file*, void*); /** show callback */
1020 u32 driver_features; /**< Required driver features for this entry */
1025 * debugfs node structure. This structure represents a debugfs file.
1027 struct drm_info_node {
1028 struct list_head list;
1029 struct drm_minor *minor;
1030 const struct drm_info_list *info_ent;
1031 struct dentry *dent;
1035 * DRM minor structure. This structure represents a drm minor number.
1038 int index; /**< Minor device number */
1039 int type; /**< Control or render */
1040 dev_t device; /**< Device number for mknod */
1041 struct device *kdev; /**< Linux device */
1042 struct drm_device *dev;
1044 struct dentry *debugfs_root;
1046 struct list_head debugfs_list;
1047 struct mutex debugfs_lock; /* Protects debugfs_list. */
1049 struct drm_master *master; /* currently active master for this node */
1050 struct list_head master_list;
1051 struct drm_mode_group mode_group;
1054 /* mode specified on the command line */
1055 struct drm_cmdline_mode {
1057 bool refresh_specified;
1066 enum drm_connector_force force;
1070 struct drm_pending_vblank_event {
1071 struct drm_pending_event base;
1073 struct drm_event_vblank event;
1076 struct drm_vblank_crtc {
1077 wait_queue_head_t queue; /**< VBLANK wait queue */
1078 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1079 atomic_t count; /**< number of VBLANK interrupts */
1080 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1081 u32 last; /* protected by dev->vbl_lock, used */
1082 /* for wraparound handling */
1083 u32 last_wait; /* Last vblank seqno waited per CRTC */
1084 unsigned int inmodeset; /* Display driver is setting mode */
1085 bool enabled; /* so we don't call enable more than
1090 * DRM device structure. This structure represent a complete card that
1091 * may contain multiple heads.
1094 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1095 char *devname; /**< For /proc/interrupts */
1096 int if_version; /**< Highest interface version set */
1100 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1101 struct mutex struct_mutex; /**< For others */
1104 /** \name Usage Counters */
1106 int open_count; /**< Outstanding files open */
1107 int buf_use; /**< Buffers in use -- cannot alloc */
1108 atomic_t buf_alloc; /**< Buffer allocation in progress */
1111 struct list_head filelist;
1113 /** \name Memory management */
1115 struct list_head maplist; /**< Linked list of regions */
1116 struct drm_open_hash map_hash; /**< User token hash table for maps */
1118 /** \name Context handle management */
1120 struct list_head ctxlist; /**< Linked list of context handles */
1121 struct mutex ctxlist_mutex; /**< For ctxlist */
1125 struct list_head vmalist; /**< List of vmas (for debugging) */
1129 /** \name DMA support */
1131 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1134 /** \name Context support */
1136 bool irq_enabled; /**< True if irq handler is enabled */
1137 __volatile__ long context_flag; /**< Context swapping flag */
1138 int last_context; /**< Last current context */
1141 /** \name VBLANK IRQ support */
1145 * At load time, disabling the vblank interrupt won't be allowed since
1146 * old clients may not call the modeset ioctl and therefore misbehave.
1147 * Once the modeset ioctl *has* been called though, we can safely
1148 * disable them when unused.
1150 bool vblank_disable_allowed;
1152 /* array of size num_crtcs */
1153 struct drm_vblank_crtc *vblank;
1155 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1156 spinlock_t vbl_lock;
1157 struct timer_list vblank_disable_timer;
1159 u32 max_vblank_count; /**< size of vblank counter register */
1164 struct list_head vblank_event_list;
1165 spinlock_t event_lock;
1169 struct drm_agp_head *agp; /**< AGP data */
1171 struct device *dev; /**< Device structure */
1172 struct pci_dev *pdev; /**< PCI device structure */
1174 struct pci_controller *hose;
1177 struct platform_device *platformdev; /**< Platform device struture */
1178 struct usb_device *usbdev;
1180 struct drm_sg_mem *sg; /**< Scatter gather memory */
1181 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1182 void *dev_private; /**< device private data */
1183 struct address_space *dev_mapping;
1184 struct drm_sigdata sigdata; /**< For block_all_signals */
1187 struct drm_driver *driver;
1188 struct drm_local_map *agp_buffer_map;
1189 unsigned int agp_buffer_token;
1190 struct drm_minor *control; /**< Control node for card */
1191 struct drm_minor *primary; /**< render type primary screen head */
1192 struct drm_minor *render; /**< render node for card */
1194 struct drm_mode_config mode_config; /**< Current mode config */
1196 /** \name GEM information */
1198 struct mutex object_name_lock;
1199 struct idr object_name_idr;
1200 struct drm_vma_offset_manager *vma_offset_manager;
1202 int switch_power_state;
1204 atomic_t unplugged; /* device has been unplugged or gone away */
1207 #define DRM_SWITCH_POWER_ON 0
1208 #define DRM_SWITCH_POWER_OFF 1
1209 #define DRM_SWITCH_POWER_CHANGING 2
1210 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1212 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1215 return ((dev->driver->driver_features & feature) ? 1 : 0);
1218 static inline int drm_dev_to_irq(struct drm_device *dev)
1220 return dev->driver->bus->get_irq(dev);
1223 static inline void drm_device_set_unplugged(struct drm_device *dev)
1226 atomic_set(&dev->unplugged, 1);
1229 static inline int drm_device_is_unplugged(struct drm_device *dev)
1231 int ret = atomic_read(&dev->unplugged);
1236 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1238 return mutex_is_locked(&dev->mode_config.mutex);
1241 static inline bool drm_is_render_client(struct drm_file *file_priv)
1243 return file_priv->minor->type == DRM_MINOR_RENDER;
1246 /******************************************************************/
1247 /** \name Internal function definitions */
1250 /* Driver support (drm_drv.h) */
1251 extern long drm_ioctl(struct file *filp,
1252 unsigned int cmd, unsigned long arg);
1253 extern long drm_compat_ioctl(struct file *filp,
1254 unsigned int cmd, unsigned long arg);
1255 extern int drm_lastclose(struct drm_device *dev);
1257 /* Device support (drm_fops.h) */
1258 extern struct mutex drm_global_mutex;
1259 extern int drm_open(struct inode *inode, struct file *filp);
1260 extern int drm_stub_open(struct inode *inode, struct file *filp);
1261 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1262 size_t count, loff_t *offset);
1263 extern int drm_release(struct inode *inode, struct file *filp);
1265 /* Mapping support (drm_vm.h) */
1266 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1267 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1268 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1269 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1270 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1272 /* Memory management support (drm_memory.h) */
1273 #include <drm/drm_memory.h>
1276 /* Misc. IOCTL support (drm_ioctl.h) */
1277 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1278 struct drm_file *file_priv);
1279 extern int drm_getunique(struct drm_device *dev, void *data,
1280 struct drm_file *file_priv);
1281 extern int drm_setunique(struct drm_device *dev, void *data,
1282 struct drm_file *file_priv);
1283 extern int drm_getmap(struct drm_device *dev, void *data,
1284 struct drm_file *file_priv);
1285 extern int drm_getclient(struct drm_device *dev, void *data,
1286 struct drm_file *file_priv);
1287 extern int drm_getstats(struct drm_device *dev, void *data,
1288 struct drm_file *file_priv);
1289 extern int drm_getcap(struct drm_device *dev, void *data,
1290 struct drm_file *file_priv);
1291 extern int drm_setclientcap(struct drm_device *dev, void *data,
1292 struct drm_file *file_priv);
1293 extern int drm_setversion(struct drm_device *dev, void *data,
1294 struct drm_file *file_priv);
1295 extern int drm_noop(struct drm_device *dev, void *data,
1296 struct drm_file *file_priv);
1298 /* Context IOCTL support (drm_context.h) */
1299 extern int drm_resctx(struct drm_device *dev, void *data,
1300 struct drm_file *file_priv);
1301 extern int drm_addctx(struct drm_device *dev, void *data,
1302 struct drm_file *file_priv);
1303 extern int drm_getctx(struct drm_device *dev, void *data,
1304 struct drm_file *file_priv);
1305 extern int drm_switchctx(struct drm_device *dev, void *data,
1306 struct drm_file *file_priv);
1307 extern int drm_newctx(struct drm_device *dev, void *data,
1308 struct drm_file *file_priv);
1309 extern int drm_rmctx(struct drm_device *dev, void *data,
1310 struct drm_file *file_priv);
1312 extern int drm_ctxbitmap_init(struct drm_device *dev);
1313 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1314 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1316 extern int drm_setsareactx(struct drm_device *dev, void *data,
1317 struct drm_file *file_priv);
1318 extern int drm_getsareactx(struct drm_device *dev, void *data,
1319 struct drm_file *file_priv);
1321 /* Authentication IOCTL support (drm_auth.h) */
1322 extern int drm_getmagic(struct drm_device *dev, void *data,
1323 struct drm_file *file_priv);
1324 extern int drm_authmagic(struct drm_device *dev, void *data,
1325 struct drm_file *file_priv);
1326 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1328 /* Cache management (drm_cache.c) */
1329 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1330 void drm_clflush_sg(struct sg_table *st);
1331 void drm_clflush_virt_range(char *addr, unsigned long length);
1333 /* Locking IOCTL support (drm_lock.h) */
1334 extern int drm_lock(struct drm_device *dev, void *data,
1335 struct drm_file *file_priv);
1336 extern int drm_unlock(struct drm_device *dev, void *data,
1337 struct drm_file *file_priv);
1338 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1339 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1340 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1343 * These are exported to drivers so that they can implement fencing using
1344 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1347 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1349 /* Buffer management support (drm_bufs.h) */
1350 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1351 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1352 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1353 unsigned int size, enum drm_map_type type,
1354 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1355 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1356 struct drm_file *file_priv);
1357 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1358 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1359 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1360 struct drm_file *file_priv);
1361 extern int drm_addbufs(struct drm_device *dev, void *data,
1362 struct drm_file *file_priv);
1363 extern int drm_infobufs(struct drm_device *dev, void *data,
1364 struct drm_file *file_priv);
1365 extern int drm_markbufs(struct drm_device *dev, void *data,
1366 struct drm_file *file_priv);
1367 extern int drm_freebufs(struct drm_device *dev, void *data,
1368 struct drm_file *file_priv);
1369 extern int drm_mapbufs(struct drm_device *dev, void *data,
1370 struct drm_file *file_priv);
1371 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1372 struct drm_file *file_priv);
1374 /* DMA support (drm_dma.h) */
1375 extern int drm_legacy_dma_setup(struct drm_device *dev);
1376 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1377 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1378 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1379 struct drm_file *filp);
1381 /* IRQ support (drm_irq.h) */
1382 extern int drm_control(struct drm_device *dev, void *data,
1383 struct drm_file *file_priv);
1384 extern int drm_irq_install(struct drm_device *dev);
1385 extern int drm_irq_uninstall(struct drm_device *dev);
1387 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1388 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1389 struct drm_file *filp);
1390 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1391 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1392 struct timeval *vblanktime);
1393 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1394 struct drm_pending_vblank_event *e);
1395 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1396 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1397 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1398 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1399 extern void drm_vblank_cleanup(struct drm_device *dev);
1400 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1401 struct timeval *tvblank, unsigned flags);
1402 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1403 int crtc, int *max_error,
1404 struct timeval *vblank_time,
1406 const struct drm_crtc *refcrtc,
1407 const struct drm_display_mode *mode);
1408 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1409 const struct drm_display_mode *mode);
1412 drm_mode_parse_command_line_for_connector(const char *mode_option,
1413 struct drm_connector *connector,
1414 struct drm_cmdline_mode *mode);
1416 extern struct drm_display_mode *
1417 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1418 struct drm_cmdline_mode *cmd);
1420 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1421 struct drm_display_mode *dmode);
1422 extern int of_get_drm_display_mode(struct device_node *np,
1423 struct drm_display_mode *dmode,
1426 /* Modesetting support */
1427 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1428 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1429 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1430 struct drm_file *file_priv);
1432 /* AGP/GART support (drm_agpsupport.h) */
1434 #include <drm/drm_agpsupport.h>
1436 /* Stub support (drm_stub.h) */
1437 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1438 struct drm_file *file_priv);
1439 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1440 struct drm_file *file_priv);
1441 struct drm_master *drm_master_create(struct drm_minor *minor);
1442 extern struct drm_master *drm_master_get(struct drm_master *master);
1443 extern void drm_master_put(struct drm_master **master);
1445 extern void drm_put_dev(struct drm_device *dev);
1446 extern void drm_unplug_dev(struct drm_device *dev);
1447 extern unsigned int drm_debug;
1448 extern unsigned int drm_rnodes;
1450 extern unsigned int drm_vblank_offdelay;
1451 extern unsigned int drm_timestamp_precision;
1452 extern unsigned int drm_timestamp_monotonic;
1454 extern struct class *drm_class;
1455 extern struct dentry *drm_debugfs_root;
1457 extern struct idr drm_minors_idr;
1459 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1461 /* Debugfs support */
1462 #if defined(CONFIG_DEBUG_FS)
1463 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1464 struct dentry *root);
1465 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1466 int count, struct dentry *root,
1467 struct drm_minor *minor);
1468 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1469 int count, struct drm_minor *minor);
1470 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1472 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1473 struct dentry *root)
1478 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1479 int count, struct dentry *root,
1480 struct drm_minor *minor)
1485 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1486 int count, struct drm_minor *minor)
1491 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1497 /* Info file support */
1498 extern int drm_name_info(struct seq_file *m, void *data);
1499 extern int drm_vm_info(struct seq_file *m, void *data);
1500 extern int drm_bufs_info(struct seq_file *m, void *data);
1501 extern int drm_vblank_info(struct seq_file *m, void *data);
1502 extern int drm_clients_info(struct seq_file *m, void* data);
1503 extern int drm_gem_name_info(struct seq_file *m, void *data);
1506 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1507 struct drm_gem_object *obj, int flags);
1508 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1509 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1511 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1512 struct dma_buf *dma_buf);
1513 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1514 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1515 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1517 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1518 struct drm_file *file_priv);
1519 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1520 struct drm_file *file_priv);
1522 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1523 dma_addr_t *addrs, int max_pages);
1524 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1525 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1527 int drm_gem_dumb_destroy(struct drm_file *file,
1528 struct drm_device *dev,
1531 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1532 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1533 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1536 extern int drm_vma_info(struct seq_file *m, void *data);
1539 /* Scatter Gather Support (drm_scatter.h) */
1540 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1541 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1542 struct drm_file *file_priv);
1543 extern int drm_sg_free(struct drm_device *dev, void *data,
1544 struct drm_file *file_priv);
1546 /* ATI PCIGART support (ati_pcigart.h) */
1547 extern int drm_ati_pcigart_init(struct drm_device *dev,
1548 struct drm_ati_pcigart_info * gart_info);
1549 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1550 struct drm_ati_pcigart_info * gart_info);
1552 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1554 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1555 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1557 /* sysfs support (drm_sysfs.c) */
1558 struct drm_sysfs_class;
1559 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1560 extern void drm_sysfs_destroy(void);
1561 extern int drm_sysfs_device_add(struct drm_minor *minor);
1562 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1563 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1564 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1565 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1567 /* Graphics Execution Manager library functions (drm_gem.c) */
1568 int drm_gem_init(struct drm_device *dev);
1569 void drm_gem_destroy(struct drm_device *dev);
1570 void drm_gem_object_release(struct drm_gem_object *obj);
1571 void drm_gem_object_free(struct kref *kref);
1572 int drm_gem_object_init(struct drm_device *dev,
1573 struct drm_gem_object *obj, size_t size);
1574 void drm_gem_private_object_init(struct drm_device *dev,
1575 struct drm_gem_object *obj, size_t size);
1576 void drm_gem_vm_open(struct vm_area_struct *vma);
1577 void drm_gem_vm_close(struct vm_area_struct *vma);
1578 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1579 struct vm_area_struct *vma);
1580 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1582 #include <drm/drm_global.h>
1585 drm_gem_object_reference(struct drm_gem_object *obj)
1587 kref_get(&obj->refcount);
1591 drm_gem_object_unreference(struct drm_gem_object *obj)
1594 kref_put(&obj->refcount, drm_gem_object_free);
1598 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1600 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1601 struct drm_device *dev = obj->dev;
1603 mutex_lock(&dev->struct_mutex);
1604 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1605 drm_gem_object_free(&obj->refcount);
1606 mutex_unlock(&dev->struct_mutex);
1610 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1611 struct drm_gem_object *obj,
1613 int drm_gem_handle_create(struct drm_file *file_priv,
1614 struct drm_gem_object *obj,
1616 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1619 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1620 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1621 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1623 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1624 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1625 bool dirty, bool accessed);
1627 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1628 struct drm_file *filp,
1630 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1631 struct drm_file *file_priv);
1632 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1633 struct drm_file *file_priv);
1634 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1635 struct drm_file *file_priv);
1636 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1637 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1639 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1640 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1641 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1643 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1646 struct drm_map_list *_entry;
1647 list_for_each_entry(_entry, &dev->maplist, head)
1648 if (_entry->user_token == token)
1653 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1657 #include <drm/drm_mem_util.h>
1659 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1660 struct device *parent);
1661 void drm_dev_free(struct drm_device *dev);
1662 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1663 void drm_dev_unregister(struct drm_device *dev);
1667 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1669 if (dev->driver->device_is_agp != NULL) {
1670 int err = (*dev->driver->device_is_agp) (dev);
1677 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1679 void drm_pci_agp_destroy(struct drm_device *dev);
1681 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1682 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1683 extern int drm_get_pci_dev(struct pci_dev *pdev,
1684 const struct pci_device_id *ent,
1685 struct drm_driver *driver);
1687 #define DRM_PCIE_SPEED_25 1
1688 #define DRM_PCIE_SPEED_50 2
1689 #define DRM_PCIE_SPEED_80 4
1691 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1693 /* platform section */
1694 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1696 /* returns true if currently okay to sleep */
1697 static __inline__ bool drm_can_sleep(void)
1699 if (in_atomic() || in_dbg_master() || irqs_disabled())
1704 #endif /* __KERNEL__ */