2 * Internal Header for the Direct Rendering Manager
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
6 * Copyright (c) 2009-2010, Code Aurora Forum.
9 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
10 * Author: Gareth Hughes <gareth@valinux.com>
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
19 * The above copyright notice and this permission notice (including the next
20 * paragraph) shall be included in all copies or substantial portions of the
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
27 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
28 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
29 * OTHER DEALINGS IN THE SOFTWARE.
35 #if defined(_KERNEL) || defined(__KERNEL__)
37 #include <sys/param.h>
38 #include <sys/queue.h>
39 #include <sys/malloc.h>
40 #include <sys/kernel.h>
42 #include <sys/module.h>
43 #include <sys/systm.h>
44 #include <sys/device.h>
45 #include <sys/sglist.h>
50 #include <sys/spinlock.h>
51 #include <sys/spinlock2.h>
52 #include <sys/fcntl.h>
54 #include <sys/filio.h>
55 #include <sys/sysctl.h>
57 #include <sys/queue.h>
58 #include <sys/signalvar.h>
60 #include <linux/highmem.h>
62 #include <sys/taskqueue.h>
66 #include <vm/vm_extern.h>
67 #include <vm/vm_kern.h>
68 #include <vm/vm_map.h>
69 #include <vm/vm_object.h>
70 #include <vm/vm_page2.h>
71 #include <vm/vm_pager.h>
72 #include <vm/vm_param.h>
73 #include <machine/param.h>
74 #include <machine/pmap.h>
76 #include <machine/specialreg.h>
78 #include <machine/sysarch.h>
79 #include <sys/endian.h>
82 #include <sys/memrange.h>
83 #include <sys/mutex.h>
85 #include <uapi_drm/drm.h>
86 #include <uapi_drm/drm_sarea.h>
88 #include <linux/atomic.h>
89 #include <linux/bug.h>
90 #include <linux/dma-mapping.h>
91 #include <linux/capability.h>
92 #include <linux/err.h>
93 #include <linux/idr.h>
94 #include <linux/pci.h>
95 #include <linux/jiffies.h>
96 #include <linux/kernel.h>
98 #include <linux/kref.h>
99 #include <linux/list.h>
100 #include <linux/mm.h>
101 #include <linux/moduleparam.h>
102 #include <linux/mutex.h>
103 #include <linux/slab.h>
104 #include <linux/scatterlist.h>
105 #include <linux/timer.h>
107 #include <linux/seq_file.h>
108 #include <linux/types.h>
109 #include <linux/vmalloc.h>
110 #include <linux/wait.h>
111 #include <linux/workqueue.h>
113 #include <asm/uaccess.h>
115 #include <drm/drm_agpsupport.h>
116 #include <drm/drm_global.h>
118 #include <drm/drm_vma_manager.h>
120 #include <drm/drm_os_linux.h>
121 #include <drm/drm_hashtab.h>
122 #include <drm/drm_mm.h>
127 struct drm_gem_object;
131 struct reservation_object;
132 struct dma_buf_attachment;
135 * 4 debug categories are defined:
137 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
138 * This is the category used by the DRM_DEBUG() macro.
140 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
141 * This is the category used by the DRM_DEBUG_DRIVER() macro.
143 * KMS: used in the modesetting code.
144 * This is the category used by the DRM_DEBUG_KMS() macro.
146 * PRIME: used in the prime code.
147 * This is the category used by the DRM_DEBUG_PRIME() macro.
149 * ATOMIC: used in the atomic code.
150 * This is the category used by the DRM_DEBUG_ATOMIC() macro.
152 * Enabling verbose debug messages is done through the drm.debug parameter,
153 * each category being enabled by a bit.
155 * drm.debug=0x1 will enable CORE messages
156 * drm.debug=0x2 will enable DRIVER messages
157 * drm.debug=0x3 will enable CORE and DRIVER messages
159 * drm.debug=0xf will enable all messages
161 * An interesting feature is that it's possible to enable verbose logging at
162 * run-time by echoing the debug value in its sysfs node:
163 * # echo 0xf > /sys/module/drm/parameters/debug
165 #define DRM_UT_CORE 0x01
166 #define DRM_UT_DRIVER 0x02
167 #define DRM_UT_KMS 0x04
168 #define DRM_UT_PRIME 0x08
169 #define DRM_UT_ATOMIC 0x10
171 void drm_ut_debug_printk(const char *function_name,
172 const char *format, ...);
174 void drm_err(const char *format, ...);
176 /***********************************************************************/
177 /** \name DRM template customization defaults */
180 /* driver capabilities and requirements mask */
181 #define DRIVER_USE_AGP 0x1
182 #define DRIVER_REQUIRE_AGP 0x2
183 #define DRIVER_PCI_DMA 0x8
184 #define DRIVER_SG 0x10
185 #define DRIVER_HAVE_DMA 0x20
186 #define DRIVER_HAVE_IRQ 0x40
187 #define DRIVER_IRQ_SHARED 0x80
188 #define DRIVER_GEM 0x1000
189 #define DRIVER_MODESET 0x2000
190 #define DRIVER_PRIME 0x4000
191 #define DRIVER_RENDER 0x8000
192 #define DRIVER_ATOMIC 0x10000
193 #define DRIVER_KMS_LEGACY_CONTEXT 0x20000
195 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
197 /***********************************************************************/
198 /** \name Macros to make printk easier */
204 * \param fmt printf() like format string.
205 * \param arg arguments
207 #define DRM_ERROR(fmt, ...) \
208 kprintf("error: [" DRM_NAME ":pid%d:%s] *ERROR* " fmt, \
209 DRM_CURRENTPID, __func__ , ##__VA_ARGS__)
212 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
214 * \param fmt printf() like format string.
215 * \param arg arguments
218 #define DRM_INFO(fmt, ...) kprintf("info: [" DRM_NAME "] " fmt , ##__VA_ARGS__)
220 #define DRM_INFO_ONCE(fmt, ...) \
221 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
226 * \param fmt printf() like format string.
227 * \param arg arguments
230 #define DRM_DEBUGBITS_DEBUG 0x1
231 #define DRM_DEBUGBITS_KMS 0x2
232 #define DRM_DEBUGBITS_FAILED_IOCTL 0x4
233 #define DRM_DEBUGBITS_VERBOSE 0x8
235 #define DRM_DEBUG(fmt, ...) do { \
236 if ((drm_debug & DRM_DEBUGBITS_DEBUG) != 0) \
237 kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
238 __func__ , ##__VA_ARGS__); \
241 #define DRM_DEBUG_VERBOSE(fmt, ...) do { \
242 if ((drm_debug & DRM_DEBUGBITS_VERBOSE) != 0) \
243 kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
244 __func__ , ##__VA_ARGS__); \
247 #define DRM_DEBUG_KMS(fmt, ...) do { \
248 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) \
249 kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
250 __func__ , ##__VA_ARGS__); \
253 #define DRM_DEBUG_DRIVER(fmt, ...) do { \
254 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) \
255 kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
256 __func__ , ##__VA_ARGS__); \
259 #define DRM_DEBUG_ATOMIC(fmt, args...) \
261 if (unlikely(drm_debug & DRM_UT_ATOMIC)) \
262 drm_ut_debug_printk(__func__, fmt, ##args); \
267 /***********************************************************************/
268 /** \name Internal types and structures */
271 #define DRM_GEM_MAPPING_MASK (3ULL << 62)
272 #define DRM_GEM_MAPPING_KEY (2ULL << 62) /* Non-canonical address form */
273 #define DRM_GEM_MAX_IDX 0x3fffff
274 #define DRM_GEM_MAPPING_IDX(o) (((o) >> 40) & DRM_GEM_MAX_IDX)
275 #define DRM_GEM_MAPPING_OFF(i) (((uint64_t)(i)) << 40)
276 #define DRM_GEM_MAPPING_MAPOFF(o) \
277 ((o) & ~(DRM_GEM_MAPPING_OFF(DRM_GEM_MAX_IDX) | DRM_GEM_MAPPING_KEY))
279 SYSCTL_DECL(_hw_drm);
281 #define DRM_MAX(a,b) ((a)>(b)?(a):(b))
283 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
285 #define DRM_DEV_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
286 #define DRM_DEV_UID UID_ROOT
287 #define DRM_DEV_GID GID_WHEEL
289 #define DRM_CURPROC curthread
290 #define DRM_STRUCTPROC struct thread
291 #define DRM_CURRENTPID (curproc != NULL ? curproc->p_pid : -1)
292 #define DRM_LOCK(dev) lockmgr(&(dev)->struct_mutex, LK_EXCLUSIVE)
293 #define DRM_UNLOCK(dev) lockmgr(&(dev)->struct_mutex, LK_RELEASE)
294 #define DRM_LOCK_SLEEP(dev, chan, flags, msg, timeout) \
295 (lksleep((chan), &(dev)->struct_mutex, (flags), (msg), (timeout)))
296 #if defined(INVARIANTS)
297 #define DRM_LOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) != 0);
298 #define DRM_UNLOCK_ASSERT(dev) KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) == 0);
300 #define DRM_LOCK_ASSERT(d)
301 #define DRM_UNLOCK_ASSERT(d)
304 #define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)
306 typedef void irqreturn_t;
307 #define IRQ_HANDLED /* nothing */
308 #define IRQ_NONE /* nothing */
310 #define drm_get_device_from_kdev(_kdev) (_kdev->si_drv1)
312 #define DRM_MTRR_WC MDF_WRITECOMBINE
314 #define LOCK_TEST_WITH_RETURN(dev, file_priv) \
316 if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) || \
317 dev->lock.file_priv != file_priv) { \
318 DRM_ERROR("%s called without lock held\n", \
324 /* Returns -errno to shared code */
325 #define DRM_WAIT_ON( ret, queue, timeout, condition ) \
326 for ( ret = 0 ; !ret && !(condition) ; ) { \
327 lwkt_serialize_enter(&dev->irq_lock); \
328 if (!(condition)) { \
329 tsleep_interlock(&(queue), PCATCH); \
330 lwkt_serialize_exit(&dev->irq_lock); \
331 ret = -tsleep(&(queue), PCATCH | PINTERLOCKED, \
332 "drmwtq", (timeout)); \
334 lwkt_serialize_exit(&dev->irq_lock); \
338 int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
339 vm_memattr_t memattr);
340 void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
341 vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);
344 #define dev_dbg(dev, fmt, ...) do { \
345 if ((drm_debug& DRM_DEBUGBITS_KMS) != 0) { \
346 device_printf((dev), "debug: " fmt, ## __VA_ARGS__); \
350 typedef struct drm_pci_id_list
359 * Ioctl function type.
361 * \param inode device inode.
362 * \param file_priv DRM file private pointer.
363 * \param cmd command.
364 * \param arg argument.
366 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
367 struct drm_file *file_priv);
369 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
372 #define DRM_IOCTL_NR(n) ((n) & 0xff)
375 #define DRM_MASTER 0x2
376 #define DRM_ROOT_ONLY 0x4
377 #define DRM_CONTROL_ALLOW 0x8
378 #define DRM_UNLOCKED 0x10
379 #define DRM_RENDER_ALLOW 0x20
381 struct drm_ioctl_desc {
385 unsigned int cmd_drv;
390 * Creates a driver or general drm_ioctl_desc array entry for the given
391 * ioctl, for use by drm_ioctl().
393 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
394 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl}
396 typedef struct drm_magic_entry {
397 struct list_head head;
398 struct drm_hash_item hash_item;
399 struct drm_file *priv;
400 struct drm_magic_entry *next;
403 typedef struct drm_magic_head {
404 struct drm_magic_entry *head;
405 struct drm_magic_entry *tail;
408 typedef struct drm_buf {
409 int idx; /**< Index into master buflist */
410 int total; /**< Buffer size */
411 int order; /**< log-base-2(total) */
412 int used; /**< Amount of buffer in use (for DMA) */
413 unsigned long offset; /**< Byte offset (used internally) */
414 void *address; /**< Address of buffer */
415 unsigned long bus_address; /**< Bus address of buffer */
416 struct drm_buf *next; /**< Kernel-only: used for free list */
417 __volatile__ int waiting; /**< On kernel DMA queue */
418 __volatile__ int pending; /**< On hardware DMA queue */
419 struct drm_file *file_priv; /**< Private of holding file descr */
420 int context; /**< Kernel queue for this buffer */
421 int while_locked; /**< Dispatch this buffer while locked */
429 } list; /**< Which list we're on */
431 int dev_priv_size; /**< Size of buffer private storage */
432 void *dev_private; /**< Per-buffer private storage */
435 /** bufs is one longer than it has to be */
436 struct drm_waitlist {
437 int count; /**< Number of possible buffers */
438 struct drm_buf **bufs; /**< List of pointers to buffers */
439 struct drm_buf **rp; /**< Read pointer */
440 struct drm_buf **wp; /**< Write pointer */
441 struct drm_buf **end; /**< End pointer */
442 struct spinlock *read_lock;
443 struct spinlock *write_lock;
446 typedef struct drm_dma_handle {
454 typedef struct drm_buf_entry {
460 struct drm_dma_handle **seglist;
462 int low_mark; /**< Low water mark */
463 int high_mark; /**< High water mark */
466 /* Event queued up for userspace to read */
467 struct drm_pending_event {
468 struct drm_event *event;
469 struct list_head link;
470 struct drm_file *file_priv;
471 pid_t pid; /* pid of requester, no guarantee it's valid by the time
472 we deliver the event, for tracing only */
473 void (*destroy)(struct drm_pending_event *event);
476 /* initial implementaton using a linked list - todo hashtab */
477 struct drm_prime_file_private {
478 struct list_head head;
481 #endif /* DUMBBELL_WIP */
484 /** File private data */
487 struct drm_device *dev;
490 /* true when the client has asked us to expose stereo 3D mode flags */
493 * true if client understands CRTC primary planes and cursor planes
496 unsigned universal_planes:1;
497 /* true if client understands atomic properties */
503 unsigned long ioctl_count;
504 struct list_head lhead;
507 /** Mapping of mm object handles to object pointers. */
508 struct idr object_idr;
509 /** Lock for synchronization of access to object_idr. */
510 struct lock table_lock;
515 struct drm_master *masterp;
518 * fbs - List of framebuffers associated with this file.
520 * Protected by fbs_lock. Note that the fbs list holds a reference on
521 * the fb object to prevent it from untimely disappearing.
523 struct list_head fbs;
524 struct lock fbs_lock;
526 /** User-created blob properties; this retains a reference on the
528 struct list_head blobs;
530 wait_queue_head_t event_wait;
531 struct list_head event_list;
534 struct drm_prime_file_private prime;
540 struct drm_lock_data {
541 struct drm_hw_lock *hw_lock; /**< Hardware lock */
542 /** Private of lock holder's file (NULL=kernel) */
543 struct drm_file *file_priv;
544 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
545 unsigned long lock_time; /**< Time of last lock in jiffies */
548 /* This structure, in the struct drm_device, is always initialized while the
550 * is open. dev->dma_lock protects the incrementing of dev->buf_use, which
551 * when set marks that no further bufs may be allocated until device teardown
552 * occurs (when the last open of the device has closed). The high/low
553 * watermarks of bufs are only touched by the X Server, and thus not
554 * concurrently accessed, so no locking is needed.
556 typedef struct drm_device_dma {
558 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
559 int buf_count; /**< total number of buffers */
560 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
562 int page_count; /**< number of pages */
563 unsigned long *pagelist; /**< page list */
564 unsigned long byte_count;
566 _DRM_DMA_USE_AGP = 0x01,
567 _DRM_DMA_USE_SG = 0x02,
568 _DRM_DMA_USE_FB = 0x04,
569 _DRM_DMA_USE_PCI_RO = 0x08
574 typedef struct drm_sg_mem {
581 * Kernel side of a mapping
583 struct drm_local_map {
584 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
585 unsigned long size; /**< Requested physical size (bytes) */
586 enum drm_map_type type; /**< Type of memory to map */
587 enum drm_map_flags flags; /**< Flags */
588 void *handle; /**< User-space: "Handle" to pass to mmap() */
589 /**< Kernel-space: kernel-virtual address */
590 int mtrr; /**< MTRR slot used */
593 typedef struct drm_local_map drm_local_map_t;
598 struct drm_map_list {
599 struct list_head head; /**< list head */
600 struct drm_hash_item hash;
601 struct drm_local_map *map; /**< mapping */
603 struct drm_master *master;
604 struct drm_mm_node *file_offset_node; /**< fake offset */
608 * GEM specific mm private for tracking GEM objects
611 struct drm_vma_offset_manager vma_manager;
612 struct drm_mm offset_manager; /**< Offset mgmt for buffer objects */
613 struct drm_open_hash offset_hash; /**< User token hash table for maps */
614 struct unrhdr *idxunr;
618 #include "drm_crtc.h"
621 * struct drm_master - drm master structure
623 * @refcount: Refcount for this master object.
624 * @minor: Link back to minor char device we are master for. Immutable.
625 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
626 * @unique_len: Length of unique field. Protected by drm_global_mutex.
627 * @unique_size: Amount allocated. Protected by drm_global_mutex.
628 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
629 * @magicfree: List of used authentication tokens. Protected by struct_mutex.
630 * @lock: DRI lock information.
631 * @driver_priv: Pointer to driver-private information.
635 struct kref refcount; /* refcount for this master */
637 struct list_head head; /**< each minor contains a list of masters */
638 struct drm_minor *minor; /**< link back to minor we are a master for */
640 char *unique; /**< Unique identifier: e.g., busid */
641 int unique_len; /**< Length of unique field */
642 int unique_size; /**< amount allocated */
644 int blocked; /**< Blocked due to VC switch? */
646 struct drm_open_hash magiclist;
647 struct list_head magicfree;
648 struct drm_lock_data lock;
652 /* Size of ringbuffer for vblank timestamps. Just double-buffer
653 * in initial implementation.
655 #define DRM_VBLANKTIME_RBSIZE 2
657 /* Flags and return codes for get_vblank_timestamp() driver function. */
658 #define DRM_CALLED_FROM_VBLIRQ 1
659 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
660 #define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
662 /* get_scanout_position() return flags */
663 #define DRM_SCANOUTPOS_VALID (1 << 0)
664 #define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
665 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
668 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : (1ULL<<(n)) - 1)
671 #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
674 * DRM driver structure. This structure represent the common code for
675 * a family of cards. There will one drm_device for each card present
679 int (*load)(struct drm_device *, unsigned long flags);
680 int (*use_msi)(struct drm_device *, unsigned long flags);
681 int (*firstopen)(struct drm_device *);
682 int (*open)(struct drm_device *, struct drm_file *);
683 void (*preclose)(struct drm_device *, struct drm_file *file_priv);
684 void (*postclose)(struct drm_device *, struct drm_file *);
685 void (*lastclose)(struct drm_device *);
686 int (*unload)(struct drm_device *);
687 void (*reclaim_buffers_locked)(struct drm_device *,
688 struct drm_file *file_priv);
689 int (*dma_ioctl)(struct drm_device *dev, void *data,
690 struct drm_file *file_priv);
691 void (*dma_ready)(struct drm_device *);
692 int (*dma_quiescent)(struct drm_device *);
693 int (*dma_flush_block_and_flush)(struct drm_device *, int context,
694 enum drm_lock_flags flags);
695 int (*dma_flush_unblock)(struct drm_device *, int context,
696 enum drm_lock_flags flags);
697 int (*context_ctor)(struct drm_device *dev, int context);
698 int (*context_dtor)(struct drm_device *dev, int context);
699 int (*kernel_context_switch)(struct drm_device *dev, int old,
701 int (*kernel_context_switch_unlock)(struct drm_device *dev);
702 void (*irq_preinstall)(struct drm_device *dev);
703 int (*irq_postinstall)(struct drm_device *dev);
704 void (*irq_uninstall)(struct drm_device *dev);
705 void (*irq_handler)(void *arg);
707 u32 (*get_vblank_counter)(struct drm_device *dev, int crtc);
708 int (*enable_vblank)(struct drm_device *dev, int crtc);
709 void (*disable_vblank)(struct drm_device *dev, int crtc);
712 * Called by \c drm_device_is_agp. Typically used to determine if a
713 * card is really attached to AGP or not.
715 * \param dev DRM device handle
718 * One of three values is returned depending on whether or not the
719 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
720 * (return of 1), or may or may not be AGP (return of 2).
722 int (*device_is_agp) (struct drm_device *dev);
725 * Called by vblank timestamping code.
727 * Return the current display scanout position from a crtc, and an
728 * optional accurate ktime_get timestamp of when position was measured.
730 * \param dev DRM device.
731 * \param crtc Id of the crtc to query.
732 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
733 * \param *vpos Target location for current vertical scanout position.
734 * \param *hpos Target location for current horizontal scanout position.
735 * \param *stime Target location for timestamp taken immediately before
736 * scanout position query. Can be NULL to skip timestamp.
737 * \param *etime Target location for timestamp taken immediately after
738 * scanout position query. Can be NULL to skip timestamp.
740 * Returns vpos as a positive number while in active scanout area.
741 * Returns vpos as a negative number inside vblank, counting the number
742 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
743 * until start of active scanout / end of vblank."
745 * \return Flags, or'ed together as follows:
747 * DRM_SCANOUTPOS_VALID = Query successful.
748 * DRM_SCANOUTPOS_INVBL = Inside vblank.
749 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
750 * this flag means that returned position may be offset by a constant
751 * but unknown small number of scanlines wrt. real scanout position.
754 int (*get_scanout_position) (struct drm_device *dev, int crtc,
756 int *vpos, int *hpos, ktime_t *stime,
759 int (*get_vblank_timestamp)(struct drm_device *dev, int crtc,
760 int *max_error, struct timeval *vblank_time,
763 void (*gem_free_object)(struct drm_gem_object *obj);
764 int (*gem_open_object)(struct drm_gem_object *, struct drm_file *);
765 void (*gem_close_object)(struct drm_gem_object *, struct drm_file *);
767 struct cdev_pager_ops *gem_pager_ops;
769 int (*dumb_create)(struct drm_file *file_priv,
770 struct drm_device *dev, struct drm_mode_create_dumb *args);
771 int (*dumb_map_offset)(struct drm_file *file_priv,
772 struct drm_device *dev, uint32_t handle, uint64_t *offset);
773 int (*dumb_destroy)(struct drm_file *file_priv,
774 struct drm_device *dev, uint32_t handle);
776 int (*sysctl_init)(struct drm_device *dev,
777 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
778 void (*sysctl_cleanup)(struct drm_device *dev);
780 drm_pci_id_list_t *id_entry; /* PCI ID, name, and chipset private */
785 const char *name; /* Simple driver name */
786 const char *desc; /* Longer driver name */
787 const char *date; /* Date of last major changes. */
791 const struct drm_ioctl_desc *ioctls;
796 * Info file list entry. This structure represents a debugfs or proc file to
797 * be created by the drm core
799 struct drm_info_list {
800 const char *name; /** file name */
801 int (*show)(struct seq_file*, void*); /** show callback */
802 u32 driver_features; /**< Required driver features for this entry */
807 * debugfs node structure. This structure represents a debugfs file.
809 struct drm_info_node {
810 struct list_head list;
811 struct drm_minor *minor;
812 const struct drm_info_list *info_ent;
817 * DRM minor structure. This structure represents a drm minor number.
820 int index; /**< Minor device number */
821 int type; /**< Control or render */
822 device_t kdev; /**< OS device */
823 struct drm_device *dev;
825 struct drm_master *master; /* currently active master for this node */
826 struct list_head master_list;
827 struct drm_mode_group mode_group;
830 struct drm_pending_vblank_event {
831 struct drm_pending_event base;
833 struct drm_event_vblank event;
836 struct drm_sysctl_info {
837 struct sysctl_ctx_list ctx;
841 /* Length for the array of resource pointers for drm_get_resource_*. */
842 #define DRM_MAX_PCI_RESOURCE 6
844 struct drm_vblank_crtc {
845 struct drm_device *dev; /* pointer to the drm_device */
846 wait_queue_head_t queue; /**< VBLANK wait queue */
847 struct timer_list disable_timer; /* delayed disable timer */
849 /* vblank counter, protected by dev->vblank_time_lock for writes */
851 /* vblank timestamps, protected by dev->vblank_time_lock for writes */
852 struct timeval time[DRM_VBLANKTIME_RBSIZE];
854 atomic_t refcount; /* number of users of vblank interruptsper crtc */
855 u32 last; /* protected by dev->vbl_lock, used */
856 /* for wraparound handling */
857 u32 last_wait; /* Last vblank seqno waited per CRTC */
858 unsigned int inmodeset; /* Display driver is setting mode */
859 unsigned int pipe; /* crtc index */
860 bool enabled; /* so we don't call enable more than
865 * DRM device structure. This structure represent a complete card that
866 * may contain multiple heads.
869 drm_pci_id_list_t *id_entry; /* PCI ID, name, and chipset private */
871 char *unique; /* Unique identifier: e.g., busid */
872 int unique_len; /* Length of unique field */
873 struct cdev *devnode; /* Device number for mknod */
874 int if_version; /* Highest interface version set */
876 int flags; /* Flags to open(2) */
879 struct spinlock dma_lock; /* protects dev->dma */
880 struct lwkt_serialize irq_lock; /* protects irq condition checks */
881 struct lock dev_lock; /* protects everything else */
885 struct lock struct_mutex; /**< For others */
886 struct lock master_mutex; /**< For drm_minor::master */
889 /** \name Usage Counters */
891 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
892 struct spinlock buf_lock; /**< For drm_device::buf_use and a few other things. */
893 int buf_use; /**< Buffers in use -- cannot alloc */
894 atomic_t buf_alloc; /**< Buffer allocation in progress */
898 /** \name Performance counters */
900 unsigned long counters;
901 enum drm_stat_type types[15];
906 struct drm_open_hash magiclist; /**< magic hash table */
907 struct list_head magicfree;
909 struct list_head filelist;
911 /** \name Memory management */
913 struct list_head maplist; /**< Linked list of regions */
914 int map_count; /**< Number of mappable regions */
915 struct drm_open_hash map_hash; /**< User token hash table for maps */
917 /** \name Context handle management */
919 struct list_head ctxlist; /**< Linked list of context handles */
920 int ctx_count; /**< Number of context handles */
921 struct lock ctxlist_mutex; /**< For ctxlist */
927 struct drm_lock_data lock; /* Information on hardware lock */
929 /* DMA queues (contexts) */
930 drm_device_dma_t *dma; /* Optional pointer for DMA support */
932 int irq; /* Interrupt used by board */
933 int irq_type; /* IRQ type (MSI enabled or not) */
934 int irqrid; /* Interrupt used by board */
935 struct resource *irqr; /* Resource for interrupt used by board */
936 void *irqh; /* Handle from bus_setup_intr */
938 /* Storage of resource pointers for drm_get_resource_* */
939 struct resource *pcir[DRM_MAX_PCI_RESOURCE];
940 int pcirid[DRM_MAX_PCI_RESOURCE];
947 /** \name Context support */
949 int irq_enabled; /**< True if irq handler is enabled */
950 __volatile__ long context_flag; /**< Context swapping flag */
951 __volatile__ long interrupt_flag; /**< Interruption handler flag */
952 __volatile__ long dma_flag; /**< DMA dispatch flag */
953 wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
954 int last_checked; /**< Last context checked for DMA */
955 int last_context; /**< Last current context */
956 unsigned long last_switch; /**< jiffies at last context switch */
959 /** \name VBLANK IRQ support */
963 * At load time, disabling the vblank interrupt won't be allowed since
964 * old clients may not call the modeset ioctl and therefore misbehave.
965 * Once the modeset ioctl *has* been called though, we can safely
966 * disable them when unused.
968 bool vblank_disable_allowed;
971 * If true, vblank interrupt will be disabled immediately when the
972 * refcount drops to zero, as opposed to via the vblank disable
974 * This can be set to true it the hardware has a working vblank
975 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
978 bool vblank_disable_immediate;
980 /* array of size num_crtcs */
981 struct drm_vblank_crtc *vblank;
983 struct lock vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
984 struct lock vbl_lock;
985 struct timer_list vblank_disable_timer;
987 u32 max_vblank_count; /**< size of vblank counter register */
992 struct list_head vblank_event_list;
993 struct lock event_lock;
997 struct sigio *buf_sigio; /* Processes waiting for SIGIO */
1000 struct drm_sysctl_info *sysctl;
1003 drm_sg_mem_t *sg; /* Scatter gather memory */
1004 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1006 unsigned long *ctx_bitmap;
1013 struct drm_agp_head *agp; /**< AGP data */
1015 struct device *dev; /**< Device structure */
1016 struct pci_dev *pdev; /**< PCI device structure */
1018 struct drm_driver *driver;
1019 struct drm_local_map *agp_buffer_map;
1020 unsigned int agp_buffer_token;
1021 struct drm_minor *control; /**< Control node for card */
1022 struct drm_minor *primary; /**< render type primary screen head */
1024 struct drm_mode_config mode_config; /**< Current mode config */
1026 /** \name GEM information */
1028 struct lock object_name_lock;
1029 struct idr object_name_idr;
1033 void *sysctl_private;
1034 char busid_str[128];
1037 int switch_power_state;
1039 atomic_t unplugged; /* device has been unplugged or gone away */
1042 #define DRM_SWITCH_POWER_ON 0
1043 #define DRM_SWITCH_POWER_OFF 1
1044 #define DRM_SWITCH_POWER_CHANGING 2
1045 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1047 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1050 return ((dev->driver->driver_features & feature) ? 1 : 0);
1053 static inline void drm_device_set_unplugged(struct drm_device *dev)
1056 atomic_set(&dev->unplugged, 1);
1059 static inline int drm_device_is_unplugged(struct drm_device *dev)
1061 int ret = atomic_read(&dev->unplugged);
1066 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1068 return 0 /* file_priv->minor->type == DRM_MINOR_LEGACY */;
1072 * drm_is_master() - Check whether a DRM open-file is DRM-Master
1073 * @file: DRM open-file context
1075 * This checks whether a DRM open-file context is owner of the master context
1076 * attached to it. If a file owns a master context, it's called DRM-Master.
1077 * Per DRM device, only one such file can be DRM-Master at a time.
1079 * Returns: True if the file is DRM-Master, otherwise false.
1081 static inline bool drm_is_master(const struct drm_file *file)
1084 return file->master && file->master == file->minor->master;
1090 /******************************************************************/
1091 /** \name Internal function definitions */
1095 static inline int drm_core_has_AGP(struct drm_device *dev)
1097 return drm_core_check_feature(dev, DRIVER_USE_AGP);
1100 #define drm_core_has_AGP(dev) (0)
1103 extern int drm_notyet_flag;
1104 extern unsigned int drm_rnodes;
1105 extern unsigned int drm_universal_planes;
1107 extern int drm_vblank_offdelay;
1108 extern unsigned int drm_timestamp_precision;
1110 /* Driver support (drm_drv.h) */
1111 extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
1112 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist);
1113 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist);
1114 int drm_create_cdevs(device_t kdev);
1115 d_ioctl_t drm_ioctl;
1116 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
1118 /* Device support (drm_fops.h) */
1120 d_close_t drm_close;
1122 d_kqfilter_t drm_kqfilter;
1123 int drm_release(device_t kdev);
1126 d_mmap_single_t drm_mmap_single;
1128 void drm_cdevpriv_dtor(void *cd);
1130 int drm_add_busid_modesetting(struct drm_device *dev,
1131 struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
1133 /* File operations helpers (drm_fops.c) */
1134 extern int drm_open_helper(struct cdev *kdev, int flags, int fmt,
1136 struct drm_device *dev,
1138 extern struct drm_file *drm_find_file_by_proc(struct drm_device *dev,
1142 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1143 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1145 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1146 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1148 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1149 struct drm_file *file_priv);
1150 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1151 struct drm_file *file_priv);
1153 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, vm_page_t *pages,
1154 dma_addr_t *addrs, int max_pages);
1155 #endif /* DUMBBELL_WIP */
1156 extern struct sg_table *drm_prime_pages_to_sg(vm_page_t *pages, int nr_pages);
1157 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1160 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1161 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1162 int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
1163 int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
1164 void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1166 int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
1167 int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
1168 struct drm_gem_object **obj);
1169 #endif /* DUMBBELL_WIP */
1171 int drm_mtrr_add(unsigned long offset, size_t size, int flags);
1172 int drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags);
1175 * These are exported to drivers so that they can implement fencing using
1176 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1179 unsigned long drm_get_resource_start(struct drm_device *dev,
1180 unsigned int resource);
1181 unsigned long drm_get_resource_len(struct drm_device *dev,
1182 unsigned int resource);
1184 /* IRQ support (drm_irq.h) */
1185 extern int drm_irq_install(struct drm_device *dev, int irq);
1186 extern int drm_irq_uninstall(struct drm_device *dev);
1188 extern int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs);
1189 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1190 struct drm_file *filp);
1191 extern u32 drm_vblank_count(struct drm_device *dev, int pipe);
1192 extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
1193 extern u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
1194 struct timeval *vblanktime);
1195 extern void drm_send_vblank_event(struct drm_device *dev, unsigned int pipe,
1196 struct drm_pending_vblank_event *e);
1197 extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
1198 struct drm_pending_vblank_event *e);
1199 extern bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe);
1200 extern bool drm_crtc_handle_vblank(struct drm_crtc *crtc);
1201 extern int drm_vblank_get(struct drm_device *dev, unsigned int pipe);
1202 extern void drm_vblank_put(struct drm_device *dev, unsigned int pipe);
1203 extern int drm_crtc_vblank_get(struct drm_crtc *crtc);
1204 extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
1205 extern void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe);
1206 extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
1207 extern void drm_vblank_off(struct drm_device *dev, unsigned int pipe);
1208 extern void drm_vblank_on(struct drm_device *dev, unsigned int pipe);
1209 extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
1210 extern void drm_crtc_vblank_reset(struct drm_crtc *crtc);
1211 extern void drm_crtc_vblank_on(struct drm_crtc *crtc);
1212 extern void drm_vblank_cleanup(struct drm_device *dev);
1214 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1215 unsigned int pipe, int *max_error,
1216 struct timeval *vblank_time,
1218 const struct drm_crtc *refcrtc,
1219 const struct drm_display_mode *mode);
1220 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1221 const struct drm_display_mode *mode);
1224 * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
1225 * @crtc: which CRTC's vblank waitqueue to retrieve
1227 * This function returns a pointer to the vblank waitqueue for the CRTC.
1228 * Drivers can use this to implement vblank waits using wait_event() & co.
1230 static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
1232 return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
1235 /* Modesetting support */
1236 extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
1237 extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
1239 /* sysctl support (drm_sysctl.h) */
1240 extern int drm_sysctl_init(struct drm_device *dev);
1241 extern int drm_sysctl_cleanup(struct drm_device *dev);
1243 /* Locking IOCTL support (drm_drv.c) */
1244 int drm_lock(struct drm_device *dev, void *data,
1245 struct drm_file *file_priv);
1246 int drm_unlock(struct drm_device *dev, void *data,
1247 struct drm_file *file_priv);
1248 int drm_setversion(struct drm_device *dev, void *data,
1249 struct drm_file *file_priv);
1252 * These are exported to drivers so that they can implement fencing using
1253 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1256 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1258 /* Misc. IOCTL support (drm_ioctl.c) */
1259 int drm_noop(struct drm_device *dev, void *data,
1260 struct drm_file *file_priv);
1262 /* Cache management (drm_cache.c) */
1263 void drm_clflush_pages(struct vm_page *pages[], unsigned long num_pages);
1264 void drm_clflush_sg(struct sg_table *st);
1265 void drm_clflush_virt_range(void *addr, unsigned long length);
1267 /* DMA support (drm_dma.c) */
1268 int drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv);
1270 /* Stub support (drm_stub.h) */
1272 extern void drm_put_dev(struct drm_device *dev);
1273 extern void drm_unplug_dev(struct drm_device *dev);
1274 extern unsigned int drm_debug;
1275 extern bool drm_atomic;
1277 /* Scatter Gather Support (drm_scatter.c) */
1278 int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1279 struct drm_file *file_priv);
1280 int drm_sg_free(struct drm_device *dev, void *data,
1281 struct drm_file *file_priv);
1283 /* consistent PCI memory functions (drm_pci.c) */
1284 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1286 void drm_pci_free(struct drm_device *dev, drm_dma_handle_t *dmah);
1288 /* sysfs support (drm_sysfs.c) */
1289 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1291 int drm_gem_mmap_single(struct drm_device *dev, vm_ooffset_t *offset,
1292 vm_size_t size, struct vm_object **obj_res, int nprot);
1293 void drm_gem_pager_dtr(void *obj);
1295 struct ttm_bo_device;
1296 int ttm_bo_mmap_single(struct ttm_bo_device *bdev, vm_ooffset_t *offset,
1297 vm_size_t size, struct vm_object **obj_res, int nprot);
1298 struct ttm_buffer_object;
1299 void ttm_bo_release_mmap(struct ttm_buffer_object *bo);
1301 void drm_device_lock_mtx(struct drm_device *dev);
1302 void drm_device_unlock_mtx(struct drm_device *dev);
1303 int drm_device_sleep_mtx(struct drm_device *dev, void *chan, int flags,
1304 const char *msg, int timeout);
1305 void drm_device_assert_mtx_locked(struct drm_device *dev);
1306 void drm_device_assert_mtx_unlocked(struct drm_device *dev);
1308 void drm_device_lock_struct(struct drm_device *dev);
1309 void drm_device_unlock_struct(struct drm_device *dev);
1310 int drm_device_sleep_struct(struct drm_device *dev, void *chan, int flags,
1311 const char *msg, int timeout);
1312 void drm_device_assert_struct_locked(struct drm_device *dev);
1313 void drm_device_assert_struct_unlocked(struct drm_device *dev);
1315 void drm_compat_locking_init(struct drm_device *dev);
1316 void drm_sleep_locking_init(struct drm_device *dev);
1318 /* XXX glue logic, should be done in drm_pci_init(), pending drm update */
1319 void drm_init_pdev(struct device *dev, struct pci_dev **pdev);
1320 void drm_fini_pdev(struct pci_dev **pdev);
1322 /* Inline replacements for drm_alloc and friends */
1323 static __inline__ void *
1324 drm_alloc(size_t size, struct malloc_type *area)
1326 return kmalloc(size, area, M_WAITOK | M_NULLOK);
1329 static __inline__ void *
1330 drm_calloc(size_t nmemb, size_t size, struct malloc_type *area)
1332 return kmalloc(size * nmemb, area, M_WAITOK | M_NULLOK | M_ZERO);
1335 static __inline__ void
1336 drm_free(void *pt, struct malloc_type *area)
1338 /* kfree is special!!! */
1343 static __inline__ struct drm_local_map *
1344 drm_core_findmap(struct drm_device *dev, unsigned long offset)
1346 struct drm_map_list *_entry;
1348 list_for_each_entry(_entry, &dev->maplist, head) {
1349 if (offset == (unsigned long)_entry->map->handle)
1355 static __inline__ void drm_core_dropmap(struct drm_map *map)
1359 #include <drm/drm_mem_util.h>
1361 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1362 struct device *parent);
1363 void drm_dev_ref(struct drm_device *dev);
1364 void drm_dev_unref(struct drm_device *dev);
1365 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1366 void drm_dev_unregister(struct drm_device *dev);
1367 int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);
1369 /* FreeBSD compatibility macros */
1370 #define VM_OBJECT_WLOCK(object) VM_OBJECT_LOCK(object)
1371 #define VM_OBJECT_WUNLOCK(object) VM_OBJECT_UNLOCK(object)
1374 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1376 if (dev->driver->device_is_agp != NULL) {
1377 int err = (*dev->driver->device_is_agp) (dev);
1384 return (pci_find_extcap(dev->dev, PCIY_AGP, NULL) == 0);
1387 #define DRM_PCIE_SPEED_25 1
1388 #define DRM_PCIE_SPEED_50 2
1389 #define DRM_PCIE_SPEED_80 4
1391 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1394 #define drm_can_sleep() (HZ & 1)
1396 #endif /* __KERNEL__ */
1397 #endif /* _DRM_P_H_ */