3 * Private header for Direct Rendering Manager
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * Copyright (c) 2009-2010, Code Aurora Forum.
13 * All rights reserved.
15 * Permission is hereby granted, free of charge, to any person obtaining a
16 * copy of this software and associated documentation files (the "Software"),
17 * to deal in the Software without restriction, including without limitation
18 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
19 * and/or sell copies of the Software, and to permit persons to whom the
20 * Software is furnished to do so, subject to the following conditions:
22 * The above copyright notice and this permission notice (including the next
23 * paragraph) shall be included in all copies or substantial portions of the
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
29 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
30 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
31 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
32 * OTHER DEALINGS IN THE SOFTWARE.
40 /* add include of current.h so that "current" is defined
41 * before static inline funcs in wait.h. Doing this so we
42 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
43 #include <asm/current.h>
44 #endif /* __alpha__ */
45 #include <linux/kernel.h>
46 #include <linux/kref.h>
47 #include <linux/miscdevice.h>
49 #include <linux/init.h>
50 #include <linux/file.h>
51 #include <linux/platform_device.h>
52 #include <linux/pci.h>
53 #include <linux/jiffies.h>
54 #include <linux/dma-mapping.h>
56 #include <linux/cdev.h>
57 #include <linux/mutex.h>
59 #include <linux/slab.h>
60 #include <linux/ratelimit.h>
61 #if defined(__alpha__) || defined(__powerpc__)
62 #include <asm/pgtable.h> /* For pte_wrprotect */
65 #include <asm/uaccess.h>
66 #include <linux/types.h>
67 #include <linux/agp_backend.h>
68 #include <linux/workqueue.h>
69 #include <linux/poll.h>
70 #include <asm/pgalloc.h>
72 #include <drm/drm_sarea.h>
73 #include <drm/drm_vma_manager.h>
75 #include <linux/idr.h>
77 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
87 #include <drm/drm_os_linux.h>
88 #include <drm/drm_hashtab.h>
89 #include <drm/drm_mm.h>
91 #define DRM_UT_CORE 0x01
92 #define DRM_UT_DRIVER 0x02
93 #define DRM_UT_KMS 0x04
94 #define DRM_UT_PRIME 0x08
96 * Three debug levels are defined.
97 * drm_core, drm_driver, drm_kms
98 * drm_core level can be used in the generic drm code. For example:
99 * drm_ioctl, drm_mm, drm_memory
100 * The macro definition of DRM_DEBUG is used.
101 * DRM_DEBUG(fmt, args...)
102 * The debug info by using the DRM_DEBUG can be obtained by adding
103 * the boot option of "drm.debug=1".
105 * drm_driver level can be used in the specific drm driver. It is used
106 * to add the debug info related with the drm driver. For example:
107 * i915_drv, i915_dma, i915_gem, radeon_drv,
108 * The macro definition of DRM_DEBUG_DRIVER can be used.
109 * DRM_DEBUG_DRIVER(fmt, args...)
110 * The debug info by using the DRM_DEBUG_DRIVER can be obtained by
111 * adding the boot option of "drm.debug=0x02"
113 * drm_kms level can be used in the KMS code related with specific drm driver.
114 * It is used to add the debug info related with KMS mode. For example:
115 * the connector/crtc ,
116 * The macro definition of DRM_DEBUG_KMS can be used.
117 * DRM_DEBUG_KMS(fmt, args...)
118 * The debug info by using the DRM_DEBUG_KMS can be obtained by
119 * adding the boot option of "drm.debug=0x04"
121 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
122 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
123 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
124 * using the DRM_DEBUG_KMS and DRM_DEBUG.
127 extern __printf(4, 5)
128 void drm_ut_debug_printk(unsigned int request_level,
130 const char *function_name,
131 const char *format, ...);
132 extern __printf(2, 3)
133 int drm_err(const char *func, const char *format, ...);
135 /***********************************************************************/
136 /** \name DRM template customization defaults */
139 /* driver capabilities and requirements mask */
140 #define DRIVER_USE_AGP 0x1
141 #define DRIVER_PCI_DMA 0x8
142 #define DRIVER_SG 0x10
143 #define DRIVER_HAVE_DMA 0x20
144 #define DRIVER_HAVE_IRQ 0x40
145 #define DRIVER_IRQ_SHARED 0x80
146 #define DRIVER_GEM 0x1000
147 #define DRIVER_MODESET 0x2000
148 #define DRIVER_PRIME 0x4000
149 #define DRIVER_RENDER 0x8000
151 #define DRIVER_BUS_PCI 0x1
152 #define DRIVER_BUS_PLATFORM 0x2
153 #define DRIVER_BUS_USB 0x3
154 #define DRIVER_BUS_HOST1X 0x4
156 /***********************************************************************/
157 /** \name Begin the DRM... */
160 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
161 also include looping detection. */
163 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
164 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
165 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
167 #define DRM_MAP_HASH_OFFSET 0x10000000
171 /***********************************************************************/
172 /** \name Macros to make printk easier */
178 * \param fmt printf() like format string.
179 * \param arg arguments
181 #define DRM_ERROR(fmt, ...) \
182 drm_err(__func__, fmt, ##__VA_ARGS__)
185 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
187 * \param fmt printf() like format string.
188 * \param arg arguments
190 #define DRM_ERROR_RATELIMITED(fmt, ...) \
192 static DEFINE_RATELIMIT_STATE(_rs, \
193 DEFAULT_RATELIMIT_INTERVAL, \
194 DEFAULT_RATELIMIT_BURST); \
196 if (__ratelimit(&_rs)) \
197 drm_err(__func__, fmt, ##__VA_ARGS__); \
200 #define DRM_INFO(fmt, ...) \
201 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
203 #define DRM_INFO_ONCE(fmt, ...) \
204 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
209 * \param fmt printf() like format string.
210 * \param arg arguments
213 #define DRM_DEBUG(fmt, args...) \
215 drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, \
216 __func__, fmt, ##args); \
219 #define DRM_DEBUG_DRIVER(fmt, args...) \
221 drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME, \
222 __func__, fmt, ##args); \
224 #define DRM_DEBUG_KMS(fmt, args...) \
226 drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
227 __func__, fmt, ##args); \
229 #define DRM_DEBUG_PRIME(fmt, args...) \
231 drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
232 __func__, fmt, ##args); \
234 #define DRM_LOG(fmt, args...) \
236 drm_ut_debug_printk(DRM_UT_CORE, NULL, \
237 NULL, fmt, ##args); \
239 #define DRM_LOG_KMS(fmt, args...) \
241 drm_ut_debug_printk(DRM_UT_KMS, NULL, \
242 NULL, fmt, ##args); \
244 #define DRM_LOG_MODE(fmt, args...) \
246 drm_ut_debug_printk(DRM_UT_MODE, NULL, \
247 NULL, fmt, ##args); \
249 #define DRM_LOG_DRIVER(fmt, args...) \
251 drm_ut_debug_printk(DRM_UT_DRIVER, NULL, \
252 NULL, fmt, ##args); \
255 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
256 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
257 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
258 #define DRM_DEBUG(fmt, arg...) do { } while (0)
259 #define DRM_LOG(fmt, arg...) do { } while (0)
260 #define DRM_LOG_KMS(fmt, args...) do { } while (0)
261 #define DRM_LOG_MODE(fmt, arg...) do { } while (0)
262 #define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
268 /***********************************************************************/
269 /** \name Internal types and structures */
272 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
274 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
277 * Test that the hardware lock is held by the caller, returning otherwise.
279 * \param dev DRM device.
280 * \param filp file pointer of the caller.
282 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
284 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
285 _file_priv->master->lock.file_priv != _file_priv) { \
286 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
287 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
288 _file_priv->master->lock.file_priv, _file_priv); \
294 * Ioctl function type.
296 * \param inode device inode.
297 * \param file_priv DRM file private pointer.
298 * \param cmd command.
299 * \param arg argument.
301 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
302 struct drm_file *file_priv);
304 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
307 #define DRM_IOCTL_NR(n) _IOC_NR(n)
308 #define DRM_MAJOR 226
311 #define DRM_MASTER 0x2
312 #define DRM_ROOT_ONLY 0x4
313 #define DRM_CONTROL_ALLOW 0x8
314 #define DRM_UNLOCKED 0x10
315 #define DRM_RENDER_ALLOW 0x20
317 struct drm_ioctl_desc {
321 unsigned int cmd_drv;
326 * Creates a driver or general drm_ioctl_desc array entry for the given
327 * ioctl, for use by drm_ioctl().
330 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
331 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
333 struct drm_magic_entry {
334 struct list_head head;
335 struct drm_hash_item hash_item;
336 struct drm_file *priv;
339 struct drm_vma_entry {
340 struct list_head head;
341 struct vm_area_struct *vma;
349 int idx; /**< Index into master buflist */
350 int total; /**< Buffer size */
351 int order; /**< log-base-2(total) */
352 int used; /**< Amount of buffer in use (for DMA) */
353 unsigned long offset; /**< Byte offset (used internally) */
354 void *address; /**< Address of buffer */
355 unsigned long bus_address; /**< Bus address of buffer */
356 struct drm_buf *next; /**< Kernel-only: used for free list */
357 __volatile__ int waiting; /**< On kernel DMA queue */
358 __volatile__ int pending; /**< On hardware DMA queue */
359 struct drm_file *file_priv; /**< Private of holding file descr */
360 int context; /**< Kernel queue for this buffer */
361 int while_locked; /**< Dispatch this buffer while locked */
369 } list; /**< Which list we're on */
371 int dev_priv_size; /**< Size of buffer private storage */
372 void *dev_private; /**< Per-buffer private storage */
375 /** bufs is one longer than it has to be */
376 struct drm_waitlist {
377 int count; /**< Number of possible buffers */
378 struct drm_buf **bufs; /**< List of pointers to buffers */
379 struct drm_buf **rp; /**< Read pointer */
380 struct drm_buf **wp; /**< Write pointer */
381 struct drm_buf **end; /**< End pointer */
382 spinlock_t read_lock;
383 spinlock_t write_lock;
386 struct drm_freelist {
387 int initialized; /**< Freelist in use */
388 atomic_t count; /**< Number of free buffers */
389 struct drm_buf *next; /**< End pointer */
391 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
392 int low_mark; /**< Low water mark */
393 int high_mark; /**< High water mark */
394 atomic_t wfh; /**< If waiting for high mark */
398 typedef struct drm_dma_handle {
405 * Buffer entry. There is one of this for each buffer size order.
407 struct drm_buf_entry {
408 int buf_size; /**< size */
409 int buf_count; /**< number of buffers */
410 struct drm_buf *buflist; /**< buffer list */
413 struct drm_dma_handle **seglist;
415 struct drm_freelist freelist;
418 /* Event queued up for userspace to read */
419 struct drm_pending_event {
420 struct drm_event *event;
421 struct list_head link;
422 struct drm_file *file_priv;
423 pid_t pid; /* pid of requester, no guarantee it's valid by the time
424 we deliver the event, for tracing only */
425 void (*destroy)(struct drm_pending_event *event);
428 /* initial implementaton using a linked list - todo hashtab */
429 struct drm_prime_file_private {
430 struct list_head head;
434 /** File private data */
436 unsigned always_authenticated :1;
437 unsigned authenticated :1;
438 unsigned is_master :1; /* this file private is a master for a minor */
439 /* true when the client has asked us to expose stereo 3D mode flags */
440 unsigned stereo_allowed :1;
445 struct list_head lhead;
446 struct drm_minor *minor;
447 unsigned long lock_count;
449 /** Mapping of mm object handles to object pointers. */
450 struct idr object_idr;
451 /** Lock for synchronization of access to object_idr. */
452 spinlock_t table_lock;
457 struct drm_master *master; /* master this node is currently associated with
458 N.B. not always minor->master */
460 * fbs - List of framebuffers associated with this file.
462 * Protected by fbs_lock. Note that the fbs list holds a reference on
463 * the fb object to prevent it from untimely disappearing.
465 struct list_head fbs;
466 struct mutex fbs_lock;
468 wait_queue_head_t event_wait;
469 struct list_head event_list;
472 struct drm_prime_file_private prime;
477 atomic_t use_count; /**< Outstanding uses (+1) */
478 atomic_t finalization; /**< Finalization in progress */
479 atomic_t block_count; /**< Count of processes waiting */
480 atomic_t block_read; /**< Queue blocked for reads */
481 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
482 atomic_t block_write; /**< Queue blocked for writes */
483 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
484 atomic_t total_queued; /**< Total queued statistic */
485 atomic_t total_flushed; /**< Total flushes statistic */
486 atomic_t total_locks; /**< Total locks statistics */
487 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
488 struct drm_waitlist waitlist; /**< Pending buffers */
489 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
495 struct drm_lock_data {
496 struct drm_hw_lock *hw_lock; /**< Hardware lock */
497 /** Private of lock holder's file (NULL=kernel) */
498 struct drm_file *file_priv;
499 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
500 unsigned long lock_time; /**< Time of last lock in jiffies */
502 uint32_t kernel_waiters;
503 uint32_t user_waiters;
510 struct drm_device_dma {
512 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
513 int buf_count; /**< total number of buffers */
514 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
516 int page_count; /**< number of pages */
517 unsigned long *pagelist; /**< page list */
518 unsigned long byte_count;
520 _DRM_DMA_USE_AGP = 0x01,
521 _DRM_DMA_USE_SG = 0x02,
522 _DRM_DMA_USE_FB = 0x04,
523 _DRM_DMA_USE_PCI_RO = 0x08
529 * AGP memory entry. Stored as a doubly linked list.
532 unsigned long handle; /**< handle */
533 struct agp_memory *memory;
534 unsigned long bound; /**< address */
536 struct list_head head;
542 * \sa drm_agp_init() and drm_device::agp.
544 struct drm_agp_head {
545 struct agp_kern_info agp_info; /**< AGP device information */
546 struct list_head memory;
547 unsigned long mode; /**< AGP mode */
548 struct agp_bridge_data *bridge;
549 int enabled; /**< whether the AGP bus as been enabled */
550 int acquired; /**< whether the AGP device has been acquired */
553 int cant_use_aperture;
554 unsigned long page_mask;
558 * Scatter-gather memory.
561 unsigned long handle;
564 struct page **pagelist;
570 struct drm_hw_lock *lock;
575 * Kernel side of a mapping
577 struct drm_local_map {
578 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
579 unsigned long size; /**< Requested physical size (bytes) */
580 enum drm_map_type type; /**< Type of memory to map */
581 enum drm_map_flags flags; /**< Flags */
582 void *handle; /**< User-space: "Handle" to pass to mmap() */
583 /**< Kernel-space: kernel-virtual address */
584 int mtrr; /**< MTRR slot used */
587 typedef struct drm_local_map drm_local_map_t;
592 struct drm_map_list {
593 struct list_head head; /**< list head */
594 struct drm_hash_item hash;
595 struct drm_local_map *map; /**< mapping */
597 struct drm_master *master;
601 * Context handle list
603 struct drm_ctx_list {
604 struct list_head head; /**< list head */
605 drm_context_t handle; /**< context handle */
606 struct drm_file *tag; /**< associated fd private data */
609 /* location of GART table */
610 #define DRM_ATI_GART_MAIN 1
611 #define DRM_ATI_GART_FB 2
613 #define DRM_ATI_GART_PCI 1
614 #define DRM_ATI_GART_PCIE 2
615 #define DRM_ATI_GART_IGP 3
617 struct drm_ati_pcigart_info {
618 int gart_table_location;
622 dma_addr_t table_mask;
623 struct drm_dma_handle *table_handle;
624 struct drm_local_map mapping;
629 * This structure defines the drm_mm memory object, which will be used by the
630 * DRM for its buffer objects.
632 struct drm_gem_object {
633 /** Reference count of this object */
634 struct kref refcount;
637 * handle_count - gem file_priv handle count of this object
639 * Each handle also holds a reference. Note that when the handle_count
640 * drops to 0 any global names (e.g. the id in the flink namespace) will
643 * Protected by dev->object_name_lock.
645 unsigned handle_count;
647 /** Related drm device */
648 struct drm_device *dev;
650 /** File representing the shmem storage */
653 /* Mapping info for this object */
654 struct drm_vma_offset_node vma_node;
657 * Size of the object, in bytes. Immutable over the object's
663 * Global name for this object, starts at 1. 0 means unnamed.
664 * Access is covered by the object_name_lock in the related drm_device
669 * Memory domains. These monitor which caches contain read/write data
670 * related to the object. When transitioning from one set of domains
671 * to another, the driver is called to ensure that caches are suitably
672 * flushed and invalidated
674 uint32_t read_domains;
675 uint32_t write_domain;
678 * While validating an exec operation, the
679 * new read/write domain values are computed here.
680 * They will be transferred to the above values
681 * at the point that any cache flushing occurs
683 uint32_t pending_read_domains;
684 uint32_t pending_write_domain;
687 * dma_buf - dma buf associated with this GEM object
689 * Pointer to the dma-buf associated with this gem object (either
690 * through importing or exporting). We break the resulting reference
691 * loop when the last gem handle for this object is released.
693 * Protected by obj->object_name_lock
695 struct dma_buf *dma_buf;
698 * import_attach - dma buf attachment backing this object
700 * Any foreign dma_buf imported as a gem object has this set to the
701 * attachment point for the device. This is invariant over the lifetime
704 * The driver's ->gem_free_object callback is responsible for cleaning
705 * up the dma_buf attachment and references acquired at import time.
707 * Note that the drm gem/prime core does not depend upon drivers setting
708 * this field any more. So for drivers where this doesn't make sense
709 * (e.g. virtual devices or a displaylink behind an usb bus) they can
710 * simply leave it as NULL.
712 struct dma_buf_attachment *import_attach;
715 #include <drm/drm_crtc.h>
717 /* per-master structure */
720 struct kref refcount; /* refcount for this master */
722 struct list_head head; /**< each minor contains a list of masters */
723 struct drm_minor *minor; /**< link back to minor we are a master for */
725 char *unique; /**< Unique identifier: e.g., busid */
726 int unique_len; /**< Length of unique field */
727 int unique_size; /**< amount allocated */
729 int blocked; /**< Blocked due to VC switch? */
731 /** \name Authentication */
733 struct drm_open_hash magiclist;
734 struct list_head magicfree;
737 struct drm_lock_data lock; /**< Information on hardware lock */
739 void *driver_priv; /**< Private structure for driver to use */
742 /* Size of ringbuffer for vblank timestamps. Just double-buffer
743 * in initial implementation.
745 #define DRM_VBLANKTIME_RBSIZE 2
747 /* Flags and return codes for get_vblank_timestamp() driver function. */
748 #define DRM_CALLED_FROM_VBLIRQ 1
749 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
750 #define DRM_VBLANKTIME_INVBL (1 << 1)
752 /* get_scanout_position() return flags */
753 #define DRM_SCANOUTPOS_VALID (1 << 0)
754 #define DRM_SCANOUTPOS_INVBL (1 << 1)
755 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
759 int (*get_irq)(struct drm_device *dev);
760 const char *(*get_name)(struct drm_device *dev);
761 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
762 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
763 struct drm_unique *unique);
764 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
768 * DRM driver structure. This structure represent the common code for
769 * a family of cards. There will one drm_device for each card present
773 int (*load) (struct drm_device *, unsigned long flags);
774 int (*firstopen) (struct drm_device *);
775 int (*open) (struct drm_device *, struct drm_file *);
776 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
777 void (*postclose) (struct drm_device *, struct drm_file *);
778 void (*lastclose) (struct drm_device *);
779 int (*unload) (struct drm_device *);
780 int (*suspend) (struct drm_device *, pm_message_t state);
781 int (*resume) (struct drm_device *);
782 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
783 int (*dma_quiescent) (struct drm_device *);
784 int (*context_dtor) (struct drm_device *dev, int context);
787 * get_vblank_counter - get raw hardware vblank counter
789 * @crtc: counter to fetch
791 * Driver callback for fetching a raw hardware vblank counter for @crtc.
792 * If a device doesn't have a hardware counter, the driver can simply
793 * return the value of drm_vblank_count. The DRM core will account for
794 * missed vblank events while interrupts where disabled based on system
797 * Wraparound handling and loss of events due to modesetting is dealt
798 * with in the DRM core code.
801 * Raw vblank counter value.
803 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
806 * enable_vblank - enable vblank interrupt events
808 * @crtc: which irq to enable
810 * Enable vblank interrupts for @crtc. If the device doesn't have
811 * a hardware vblank counter, this routine should be a no-op, since
812 * interrupts will have to stay on to keep the count accurate.
815 * Zero on success, appropriate errno if the given @crtc's vblank
816 * interrupt cannot be enabled.
818 int (*enable_vblank) (struct drm_device *dev, int crtc);
821 * disable_vblank - disable vblank interrupt events
823 * @crtc: which irq to enable
825 * Disable vblank interrupts for @crtc. If the device doesn't have
826 * a hardware vblank counter, this routine should be a no-op, since
827 * interrupts will have to stay on to keep the count accurate.
829 void (*disable_vblank) (struct drm_device *dev, int crtc);
832 * Called by \c drm_device_is_agp. Typically used to determine if a
833 * card is really attached to AGP or not.
835 * \param dev DRM device handle
838 * One of three values is returned depending on whether or not the
839 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
840 * (return of 1), or may or may not be AGP (return of 2).
842 int (*device_is_agp) (struct drm_device *dev);
845 * Called by vblank timestamping code.
847 * Return the current display scanout position from a crtc, and an
848 * optional accurate ktime_get timestamp of when position was measured.
850 * \param dev DRM device.
851 * \param crtc Id of the crtc to query.
852 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
853 * \param *vpos Target location for current vertical scanout position.
854 * \param *hpos Target location for current horizontal scanout position.
855 * \param *stime Target location for timestamp taken immediately before
856 * scanout position query. Can be NULL to skip timestamp.
857 * \param *etime Target location for timestamp taken immediately after
858 * scanout position query. Can be NULL to skip timestamp.
860 * Returns vpos as a positive number while in active scanout area.
861 * Returns vpos as a negative number inside vblank, counting the number
862 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
863 * until start of active scanout / end of vblank."
865 * \return Flags, or'ed together as follows:
867 * DRM_SCANOUTPOS_VALID = Query successful.
868 * DRM_SCANOUTPOS_INVBL = Inside vblank.
869 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
870 * this flag means that returned position may be offset by a constant
871 * but unknown small number of scanlines wrt. real scanout position.
874 int (*get_scanout_position) (struct drm_device *dev, int crtc,
876 int *vpos, int *hpos, ktime_t *stime,
880 * Called by \c drm_get_last_vbltimestamp. Should return a precise
881 * timestamp when the most recent VBLANK interval ended or will end.
883 * Specifically, the timestamp in @vblank_time should correspond as
884 * closely as possible to the time when the first video scanline of
885 * the video frame after the end of VBLANK will start scanning out,
886 * the time immediately after end of the VBLANK interval. If the
887 * @crtc is currently inside VBLANK, this will be a time in the future.
888 * If the @crtc is currently scanning out a frame, this will be the
889 * past start time of the current scanout. This is meant to adhere
890 * to the OpenML OML_sync_control extension specification.
892 * \param dev dev DRM device handle.
893 * \param crtc crtc for which timestamp should be returned.
894 * \param *max_error Maximum allowable timestamp error in nanoseconds.
895 * Implementation should strive to provide timestamp
896 * with an error of at most *max_error nanoseconds.
897 * Returns true upper bound on error for timestamp.
898 * \param *vblank_time Target location for returned vblank timestamp.
899 * \param flags 0 = Defaults, no special treatment needed.
900 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
901 * irq handler. Some drivers need to apply some workarounds
902 * for gpu-specific vblank irq quirks if flag is set.
905 * Zero if timestamping isn't supported in current display mode or a
906 * negative number on failure. A positive status code on success,
907 * which describes how the vblank_time timestamp was computed.
909 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
911 struct timeval *vblank_time,
914 /* these have to be filled in */
916 irqreturn_t(*irq_handler) (int irq, void *arg);
917 void (*irq_preinstall) (struct drm_device *dev);
918 int (*irq_postinstall) (struct drm_device *dev);
919 void (*irq_uninstall) (struct drm_device *dev);
921 /* Master routines */
922 int (*master_create)(struct drm_device *dev, struct drm_master *master);
923 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
925 * master_set is called whenever the minor master is set.
926 * master_drop is called whenever the minor master is dropped.
929 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
931 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
934 int (*debugfs_init)(struct drm_minor *minor);
935 void (*debugfs_cleanup)(struct drm_minor *minor);
938 * Driver-specific constructor for drm_gem_objects, to set up
939 * obj->driver_private.
941 * Returns 0 on success.
943 void (*gem_free_object) (struct drm_gem_object *obj);
944 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
945 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
948 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
949 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
950 uint32_t handle, uint32_t flags, int *prime_fd);
951 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
952 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
953 int prime_fd, uint32_t *handle);
954 /* export GEM -> dmabuf */
955 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
956 struct drm_gem_object *obj, int flags);
957 /* import dmabuf -> GEM */
958 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
959 struct dma_buf *dma_buf);
960 /* low-level interface used by drm_gem_prime_{import,export} */
961 int (*gem_prime_pin)(struct drm_gem_object *obj);
962 void (*gem_prime_unpin)(struct drm_gem_object *obj);
963 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
964 struct drm_gem_object *(*gem_prime_import_sg_table)(
965 struct drm_device *dev, size_t size,
966 struct sg_table *sgt);
967 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
968 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
969 int (*gem_prime_mmap)(struct drm_gem_object *obj,
970 struct vm_area_struct *vma);
972 /* vga arb irq handler */
973 void (*vgaarb_irq)(struct drm_device *dev, bool state);
975 /* dumb alloc support */
976 int (*dumb_create)(struct drm_file *file_priv,
977 struct drm_device *dev,
978 struct drm_mode_create_dumb *args);
979 int (*dumb_map_offset)(struct drm_file *file_priv,
980 struct drm_device *dev, uint32_t handle,
982 int (*dumb_destroy)(struct drm_file *file_priv,
983 struct drm_device *dev,
986 /* Driver private ops for this object */
987 const struct vm_operations_struct *gem_vm_ops;
998 const struct drm_ioctl_desc *ioctls;
1000 const struct file_operations *fops;
1002 struct pci_driver *pci;
1003 struct platform_device *platform_device;
1004 struct usb_driver *usb;
1006 struct drm_bus *bus;
1008 /* List of devices hanging off this driver with stealth attach. */
1009 struct list_head legacy_dev_list;
1012 enum drm_minor_type {
1020 * Info file list entry. This structure represents a debugfs or proc file to
1021 * be created by the drm core
1023 struct drm_info_list {
1024 const char *name; /** file name */
1025 int (*show)(struct seq_file*, void*); /** show callback */
1026 u32 driver_features; /**< Required driver features for this entry */
1031 * debugfs node structure. This structure represents a debugfs file.
1033 struct drm_info_node {
1034 struct list_head list;
1035 struct drm_minor *minor;
1036 const struct drm_info_list *info_ent;
1037 struct dentry *dent;
1041 * DRM minor structure. This structure represents a drm minor number.
1044 int index; /**< Minor device number */
1045 int type; /**< Control or render */
1046 struct device *kdev; /**< Linux device */
1047 struct drm_device *dev;
1049 struct dentry *debugfs_root;
1051 struct list_head debugfs_list;
1052 struct mutex debugfs_lock; /* Protects debugfs_list. */
1054 struct drm_master *master; /* currently active master for this node */
1055 struct list_head master_list;
1056 struct drm_mode_group mode_group;
1059 /* mode specified on the command line */
1060 struct drm_cmdline_mode {
1062 bool refresh_specified;
1071 enum drm_connector_force force;
1075 struct drm_pending_vblank_event {
1076 struct drm_pending_event base;
1078 struct drm_event_vblank event;
1081 struct drm_vblank_crtc {
1082 wait_queue_head_t queue; /**< VBLANK wait queue */
1083 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1084 atomic_t count; /**< number of VBLANK interrupts */
1085 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1086 u32 last; /* protected by dev->vbl_lock, used */
1087 /* for wraparound handling */
1088 u32 last_wait; /* Last vblank seqno waited per CRTC */
1089 unsigned int inmodeset; /* Display driver is setting mode */
1090 bool enabled; /* so we don't call enable more than
1095 * DRM device structure. This structure represent a complete card that
1096 * may contain multiple heads.
1099 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1100 char *devname; /**< For /proc/interrupts */
1101 int if_version; /**< Highest interface version set */
1103 /** \name Lifetime Management */
1105 struct kref ref; /**< Object ref-count */
1106 struct device *dev; /**< Device structure of bus-device */
1107 struct drm_driver *driver; /**< DRM driver managing the device */
1108 void *dev_private; /**< DRM driver private data */
1109 struct address_space *dev_mapping; /**< Private addr-space just for the device */
1110 struct drm_minor *control; /**< Control node */
1111 struct drm_minor *primary; /**< Primary node */
1112 struct drm_minor *render; /**< Render node */
1113 atomic_t unplugged; /**< Flag whether dev is dead */
1118 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1119 struct mutex struct_mutex; /**< For others */
1122 /** \name Usage Counters */
1124 int open_count; /**< Outstanding files open */
1125 int buf_use; /**< Buffers in use -- cannot alloc */
1126 atomic_t buf_alloc; /**< Buffer allocation in progress */
1129 struct list_head filelist;
1131 /** \name Memory management */
1133 struct list_head maplist; /**< Linked list of regions */
1134 struct drm_open_hash map_hash; /**< User token hash table for maps */
1136 /** \name Context handle management */
1138 struct list_head ctxlist; /**< Linked list of context handles */
1139 struct mutex ctxlist_mutex; /**< For ctxlist */
1143 struct list_head vmalist; /**< List of vmas (for debugging) */
1147 /** \name DMA support */
1149 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1152 /** \name Context support */
1154 bool irq_enabled; /**< True if irq handler is enabled */
1155 __volatile__ long context_flag; /**< Context swapping flag */
1156 int last_context; /**< Last current context */
1159 /** \name VBLANK IRQ support */
1163 * At load time, disabling the vblank interrupt won't be allowed since
1164 * old clients may not call the modeset ioctl and therefore misbehave.
1165 * Once the modeset ioctl *has* been called though, we can safely
1166 * disable them when unused.
1168 bool vblank_disable_allowed;
1170 /* array of size num_crtcs */
1171 struct drm_vblank_crtc *vblank;
1173 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1174 spinlock_t vbl_lock;
1175 struct timer_list vblank_disable_timer;
1177 u32 max_vblank_count; /**< size of vblank counter register */
1182 struct list_head vblank_event_list;
1183 spinlock_t event_lock;
1187 struct drm_agp_head *agp; /**< AGP data */
1189 struct pci_dev *pdev; /**< PCI device structure */
1191 struct pci_controller *hose;
1194 struct platform_device *platformdev; /**< Platform device struture */
1195 struct usb_device *usbdev;
1197 struct drm_sg_mem *sg; /**< Scatter gather memory */
1198 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1199 struct drm_sigdata sigdata; /**< For block_all_signals */
1202 struct drm_local_map *agp_buffer_map;
1203 unsigned int agp_buffer_token;
1205 struct drm_mode_config mode_config; /**< Current mode config */
1207 /** \name GEM information */
1209 struct mutex object_name_lock;
1210 struct idr object_name_idr;
1211 struct drm_vma_offset_manager *vma_offset_manager;
1213 int switch_power_state;
1216 #define DRM_SWITCH_POWER_ON 0
1217 #define DRM_SWITCH_POWER_OFF 1
1218 #define DRM_SWITCH_POWER_CHANGING 2
1219 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1221 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1224 return ((dev->driver->driver_features & feature) ? 1 : 0);
1227 static inline int drm_dev_to_irq(struct drm_device *dev)
1229 return dev->driver->bus->get_irq(dev);
1232 static inline void drm_device_set_unplugged(struct drm_device *dev)
1235 atomic_set(&dev->unplugged, 1);
1238 static inline int drm_device_is_unplugged(struct drm_device *dev)
1240 int ret = atomic_read(&dev->unplugged);
1245 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1247 return mutex_is_locked(&dev->mode_config.mutex);
1250 static inline bool drm_is_render_client(struct drm_file *file_priv)
1252 return file_priv->minor->type == DRM_MINOR_RENDER;
1255 /******************************************************************/
1256 /** \name Internal function definitions */
1259 /* Driver support (drm_drv.h) */
1260 extern long drm_ioctl(struct file *filp,
1261 unsigned int cmd, unsigned long arg);
1262 extern long drm_compat_ioctl(struct file *filp,
1263 unsigned int cmd, unsigned long arg);
1264 extern int drm_lastclose(struct drm_device *dev);
1266 /* Device support (drm_fops.h) */
1267 extern struct mutex drm_global_mutex;
1268 extern int drm_open(struct inode *inode, struct file *filp);
1269 extern int drm_stub_open(struct inode *inode, struct file *filp);
1270 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1271 size_t count, loff_t *offset);
1272 extern int drm_release(struct inode *inode, struct file *filp);
1274 /* Mapping support (drm_vm.h) */
1275 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1276 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1277 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1278 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1279 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1281 /* Memory management support (drm_memory.h) */
1282 #include <drm/drm_memory.h>
1285 /* Misc. IOCTL support (drm_ioctl.h) */
1286 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1287 struct drm_file *file_priv);
1288 extern int drm_getunique(struct drm_device *dev, void *data,
1289 struct drm_file *file_priv);
1290 extern int drm_setunique(struct drm_device *dev, void *data,
1291 struct drm_file *file_priv);
1292 extern int drm_getmap(struct drm_device *dev, void *data,
1293 struct drm_file *file_priv);
1294 extern int drm_getclient(struct drm_device *dev, void *data,
1295 struct drm_file *file_priv);
1296 extern int drm_getstats(struct drm_device *dev, void *data,
1297 struct drm_file *file_priv);
1298 extern int drm_getcap(struct drm_device *dev, void *data,
1299 struct drm_file *file_priv);
1300 extern int drm_setclientcap(struct drm_device *dev, void *data,
1301 struct drm_file *file_priv);
1302 extern int drm_setversion(struct drm_device *dev, void *data,
1303 struct drm_file *file_priv);
1304 extern int drm_noop(struct drm_device *dev, void *data,
1305 struct drm_file *file_priv);
1307 /* Context IOCTL support (drm_context.h) */
1308 extern int drm_resctx(struct drm_device *dev, void *data,
1309 struct drm_file *file_priv);
1310 extern int drm_addctx(struct drm_device *dev, void *data,
1311 struct drm_file *file_priv);
1312 extern int drm_getctx(struct drm_device *dev, void *data,
1313 struct drm_file *file_priv);
1314 extern int drm_switchctx(struct drm_device *dev, void *data,
1315 struct drm_file *file_priv);
1316 extern int drm_newctx(struct drm_device *dev, void *data,
1317 struct drm_file *file_priv);
1318 extern int drm_rmctx(struct drm_device *dev, void *data,
1319 struct drm_file *file_priv);
1321 extern int drm_ctxbitmap_init(struct drm_device *dev);
1322 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1323 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1325 extern int drm_setsareactx(struct drm_device *dev, void *data,
1326 struct drm_file *file_priv);
1327 extern int drm_getsareactx(struct drm_device *dev, void *data,
1328 struct drm_file *file_priv);
1330 /* Authentication IOCTL support (drm_auth.h) */
1331 extern int drm_getmagic(struct drm_device *dev, void *data,
1332 struct drm_file *file_priv);
1333 extern int drm_authmagic(struct drm_device *dev, void *data,
1334 struct drm_file *file_priv);
1335 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1337 /* Cache management (drm_cache.c) */
1338 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1339 void drm_clflush_sg(struct sg_table *st);
1340 void drm_clflush_virt_range(char *addr, unsigned long length);
1342 /* Locking IOCTL support (drm_lock.h) */
1343 extern int drm_lock(struct drm_device *dev, void *data,
1344 struct drm_file *file_priv);
1345 extern int drm_unlock(struct drm_device *dev, void *data,
1346 struct drm_file *file_priv);
1347 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1348 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1349 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1352 * These are exported to drivers so that they can implement fencing using
1353 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1356 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1358 /* Buffer management support (drm_bufs.h) */
1359 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1360 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1361 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1362 unsigned int size, enum drm_map_type type,
1363 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1364 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1365 struct drm_file *file_priv);
1366 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1367 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1368 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1369 struct drm_file *file_priv);
1370 extern int drm_addbufs(struct drm_device *dev, void *data,
1371 struct drm_file *file_priv);
1372 extern int drm_infobufs(struct drm_device *dev, void *data,
1373 struct drm_file *file_priv);
1374 extern int drm_markbufs(struct drm_device *dev, void *data,
1375 struct drm_file *file_priv);
1376 extern int drm_freebufs(struct drm_device *dev, void *data,
1377 struct drm_file *file_priv);
1378 extern int drm_mapbufs(struct drm_device *dev, void *data,
1379 struct drm_file *file_priv);
1380 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1381 struct drm_file *file_priv);
1383 /* DMA support (drm_dma.h) */
1384 extern int drm_legacy_dma_setup(struct drm_device *dev);
1385 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1386 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1387 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1388 struct drm_file *filp);
1390 /* IRQ support (drm_irq.h) */
1391 extern int drm_control(struct drm_device *dev, void *data,
1392 struct drm_file *file_priv);
1393 extern int drm_irq_install(struct drm_device *dev);
1394 extern int drm_irq_uninstall(struct drm_device *dev);
1396 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1397 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1398 struct drm_file *filp);
1399 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1400 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1401 struct timeval *vblanktime);
1402 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1403 struct drm_pending_vblank_event *e);
1404 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1405 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1406 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1407 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1408 extern void drm_vblank_cleanup(struct drm_device *dev);
1409 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1410 struct timeval *tvblank, unsigned flags);
1411 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1412 int crtc, int *max_error,
1413 struct timeval *vblank_time,
1415 const struct drm_crtc *refcrtc,
1416 const struct drm_display_mode *mode);
1417 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1418 const struct drm_display_mode *mode);
1421 drm_mode_parse_command_line_for_connector(const char *mode_option,
1422 struct drm_connector *connector,
1423 struct drm_cmdline_mode *mode);
1425 extern struct drm_display_mode *
1426 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1427 struct drm_cmdline_mode *cmd);
1429 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1430 struct drm_display_mode *dmode);
1431 extern int of_get_drm_display_mode(struct device_node *np,
1432 struct drm_display_mode *dmode,
1435 /* Modesetting support */
1436 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1437 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1438 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1439 struct drm_file *file_priv);
1441 /* AGP/GART support (drm_agpsupport.h) */
1443 #include <drm/drm_agpsupport.h>
1445 /* Stub support (drm_stub.h) */
1446 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1447 struct drm_file *file_priv);
1448 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1449 struct drm_file *file_priv);
1450 struct drm_master *drm_master_create(struct drm_minor *minor);
1451 extern struct drm_master *drm_master_get(struct drm_master *master);
1452 extern void drm_master_put(struct drm_master **master);
1454 extern void drm_put_dev(struct drm_device *dev);
1455 extern void drm_unplug_dev(struct drm_device *dev);
1456 extern unsigned int drm_debug;
1457 extern unsigned int drm_rnodes;
1459 extern unsigned int drm_vblank_offdelay;
1460 extern unsigned int drm_timestamp_precision;
1461 extern unsigned int drm_timestamp_monotonic;
1463 extern struct class *drm_class;
1464 extern struct dentry *drm_debugfs_root;
1466 extern struct idr drm_minors_idr;
1468 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1470 /* Debugfs support */
1471 #if defined(CONFIG_DEBUG_FS)
1472 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1473 struct dentry *root);
1474 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1475 int count, struct dentry *root,
1476 struct drm_minor *minor);
1477 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1478 int count, struct drm_minor *minor);
1479 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1481 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1482 struct dentry *root)
1487 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1488 int count, struct dentry *root,
1489 struct drm_minor *minor)
1494 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1495 int count, struct drm_minor *minor)
1500 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1506 /* Info file support */
1507 extern int drm_name_info(struct seq_file *m, void *data);
1508 extern int drm_vm_info(struct seq_file *m, void *data);
1509 extern int drm_bufs_info(struct seq_file *m, void *data);
1510 extern int drm_vblank_info(struct seq_file *m, void *data);
1511 extern int drm_clients_info(struct seq_file *m, void* data);
1512 extern int drm_gem_name_info(struct seq_file *m, void *data);
1515 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1516 struct drm_gem_object *obj, int flags);
1517 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1518 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1520 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1521 struct dma_buf *dma_buf);
1522 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1523 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1524 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1526 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1527 struct drm_file *file_priv);
1528 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1529 struct drm_file *file_priv);
1531 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1532 dma_addr_t *addrs, int max_pages);
1533 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1534 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1536 int drm_gem_dumb_destroy(struct drm_file *file,
1537 struct drm_device *dev,
1540 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1541 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1542 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1545 extern int drm_vma_info(struct seq_file *m, void *data);
1548 /* Scatter Gather Support (drm_scatter.h) */
1549 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1550 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1551 struct drm_file *file_priv);
1552 extern int drm_sg_free(struct drm_device *dev, void *data,
1553 struct drm_file *file_priv);
1555 /* ATI PCIGART support (ati_pcigart.h) */
1556 extern int drm_ati_pcigart_init(struct drm_device *dev,
1557 struct drm_ati_pcigart_info * gart_info);
1558 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1559 struct drm_ati_pcigart_info * gart_info);
1561 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1563 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1564 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1566 /* sysfs support (drm_sysfs.c) */
1567 struct drm_sysfs_class;
1568 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1569 extern void drm_sysfs_destroy(void);
1570 extern int drm_sysfs_device_add(struct drm_minor *minor);
1571 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1572 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1573 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1574 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1576 /* Graphics Execution Manager library functions (drm_gem.c) */
1577 int drm_gem_init(struct drm_device *dev);
1578 void drm_gem_destroy(struct drm_device *dev);
1579 void drm_gem_object_release(struct drm_gem_object *obj);
1580 void drm_gem_object_free(struct kref *kref);
1581 int drm_gem_object_init(struct drm_device *dev,
1582 struct drm_gem_object *obj, size_t size);
1583 void drm_gem_private_object_init(struct drm_device *dev,
1584 struct drm_gem_object *obj, size_t size);
1585 void drm_gem_vm_open(struct vm_area_struct *vma);
1586 void drm_gem_vm_close(struct vm_area_struct *vma);
1587 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1588 struct vm_area_struct *vma);
1589 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1591 #include <drm/drm_global.h>
1594 drm_gem_object_reference(struct drm_gem_object *obj)
1596 kref_get(&obj->refcount);
1600 drm_gem_object_unreference(struct drm_gem_object *obj)
1603 kref_put(&obj->refcount, drm_gem_object_free);
1607 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1609 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1610 struct drm_device *dev = obj->dev;
1612 mutex_lock(&dev->struct_mutex);
1613 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1614 drm_gem_object_free(&obj->refcount);
1615 mutex_unlock(&dev->struct_mutex);
1619 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1620 struct drm_gem_object *obj,
1622 int drm_gem_handle_create(struct drm_file *file_priv,
1623 struct drm_gem_object *obj,
1625 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1628 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1629 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1630 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1632 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1633 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1634 bool dirty, bool accessed);
1636 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1637 struct drm_file *filp,
1639 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1640 struct drm_file *file_priv);
1641 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1642 struct drm_file *file_priv);
1643 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1644 struct drm_file *file_priv);
1645 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1646 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1648 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1649 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1650 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1652 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1655 struct drm_map_list *_entry;
1656 list_for_each_entry(_entry, &dev->maplist, head)
1657 if (_entry->user_token == token)
1662 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1666 #include <drm/drm_mem_util.h>
1668 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1669 struct device *parent);
1670 void drm_dev_ref(struct drm_device *dev);
1671 void drm_dev_unref(struct drm_device *dev);
1672 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1673 void drm_dev_unregister(struct drm_device *dev);
1675 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
1676 void drm_minor_release(struct drm_minor *minor);
1681 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1683 if (dev->driver->device_is_agp != NULL) {
1684 int err = (*dev->driver->device_is_agp) (dev);
1691 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1693 void drm_pci_agp_destroy(struct drm_device *dev);
1695 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1696 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1697 extern int drm_get_pci_dev(struct pci_dev *pdev,
1698 const struct pci_device_id *ent,
1699 struct drm_driver *driver);
1701 #define DRM_PCIE_SPEED_25 1
1702 #define DRM_PCIE_SPEED_50 2
1703 #define DRM_PCIE_SPEED_80 4
1705 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1707 /* platform section */
1708 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1710 /* returns true if currently okay to sleep */
1711 static __inline__ bool drm_can_sleep(void)
1713 if (in_atomic() || in_dbg_master() || irqs_disabled())
1718 #endif /* __KERNEL__ */