1 /**
2 * \file drmP.h
3 * Private header for Direct Rendering Manager
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 */
8
9 /*
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.
14 *
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:
21 *
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
24 * Software.
25 *
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.
33 */
34
35 #ifndef _DRM_P_H_
36 #define _DRM_P_H_
37
38 #ifdef __KERNEL__
39 #ifdef __alpha__
40 /* add include of current.h so that "current" is defined
41 * before static inline funcs in wait.h. Doing this so we
42 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
43 #include <asm/current.h>
44 #endif /* __alpha__ */
45 #include <linux/kernel.h>
46 #include <linux/miscdevice.h>
47 #include <linux/fs.h>
48 #include <linux/proc_fs.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>
55 #include <linux/mm.h>
56 #include <linux/cdev.h>
57 #include <linux/mutex.h>
58 #include <linux/slab.h>
59 #if defined(__alpha__) || defined(__powerpc__)
60 #include <asm/pgtable.h> /* For pte_wrprotect */
61 #endif
62 #include <asm/io.h>
63 #include <asm/mman.h>
64 #include <asm/uaccess.h>
65 #ifdef CONFIG_MTRR
66 #include <asm/mtrr.h>
67 #endif
68 #if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
69 #include <linux/types.h>
70 #include <linux/agp_backend.h>
71 #endif
72 #include <linux/workqueue.h>
73 #include <linux/poll.h>
74 #include <asm/pgalloc.h>
75 #include <drm/drm.h>
76 #include <drm/drm_sarea.h>
77
78 #include <linux/idr.h>
79
80 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
81 #define __OS_HAS_MTRR (defined(CONFIG_MTRR))
82
83 struct module;
84
85 struct drm_file;
86 struct drm_device;
87
88 struct device_node;
89 struct videomode;
90
91 #include <drm/drm_os_linux.h>
92 #include <drm/drm_hashtab.h>
93 #include <drm/drm_mm.h>
94
95 #define DRM_UT_CORE 0x01
96 #define DRM_UT_DRIVER 0x02
97 #define DRM_UT_KMS 0x04
98 #define DRM_UT_PRIME 0x08
99 /*
100 * Three debug levels are defined.
101 * drm_core, drm_driver, drm_kms
102 * drm_core level can be used in the generic drm code. For example:
103 * drm_ioctl, drm_mm, drm_memory
104 * The macro definition of DRM_DEBUG is used.
105 * DRM_DEBUG(fmt, args...)
106 * The debug info by using the DRM_DEBUG can be obtained by adding
107 * the boot option of "drm.debug=1".
108 *
109 * drm_driver level can be used in the specific drm driver. It is used
110 * to add the debug info related with the drm driver. For example:
111 * i915_drv, i915_dma, i915_gem, radeon_drv,
112 * The macro definition of DRM_DEBUG_DRIVER can be used.
113 * DRM_DEBUG_DRIVER(fmt, args...)
114 * The debug info by using the DRM_DEBUG_DRIVER can be obtained by
115 * adding the boot option of "drm.debug=0x02"
116 *
117 * drm_kms level can be used in the KMS code related with specific drm driver.
118 * It is used to add the debug info related with KMS mode. For example:
119 * the connector/crtc ,
120 * The macro definition of DRM_DEBUG_KMS can be used.
121 * DRM_DEBUG_KMS(fmt, args...)
122 * The debug info by using the DRM_DEBUG_KMS can be obtained by
123 * adding the boot option of "drm.debug=0x04"
124 *
125 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
126 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
127 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
128 * using the DRM_DEBUG_KMS and DRM_DEBUG.
129 */
130
131 extern __printf(4, 5)
132 void drm_ut_debug_printk(unsigned int request_level,
133 const char *prefix,
134 const char *function_name,
135 const char *format, ...);
136 extern __printf(2, 3)
137 int drm_err(const char *func, const char *format, ...);
138
139 /***********************************************************************/
140 /** \name DRM template customization defaults */
141 /*@{*/
142
143 /* driver capabilities and requirements mask */
144 #define DRIVER_USE_AGP 0x1
145 #define DRIVER_REQUIRE_AGP 0x2
146 #define DRIVER_USE_MTRR 0x4
147 #define DRIVER_PCI_DMA 0x8
148 #define DRIVER_SG 0x10
149 #define DRIVER_HAVE_DMA 0x20
150 #define DRIVER_HAVE_IRQ 0x40
151 #define DRIVER_IRQ_SHARED 0x80
152 #define DRIVER_IRQ_VBL 0x100
153 #define DRIVER_DMA_QUEUE 0x200
154 #define DRIVER_FB_DMA 0x400
155 #define DRIVER_IRQ_VBL2 0x800
156 #define DRIVER_GEM 0x1000
157 #define DRIVER_MODESET 0x2000
158 #define DRIVER_PRIME 0x4000
159
160 #define DRIVER_BUS_PCI 0x1
161 #define DRIVER_BUS_PLATFORM 0x2
162 #define DRIVER_BUS_USB 0x3
163
164 /***********************************************************************/
165 /** \name Begin the DRM... */
166 /*@{*/
167
168 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
169 also include looping detection. */
170
171 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
172 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
173 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
174 #define DRM_LOOPING_LIMIT 5000000
175 #define DRM_TIME_SLICE (HZ/20) /**< Time slice for GLXContexts */
176 #define DRM_LOCK_SLICE 1 /**< Time slice for lock, in jiffies */
177
178 #define DRM_FLAG_DEBUG 0x01
179
180 #define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
181 #define DRM_MAP_HASH_OFFSET 0x10000000
182
183 /*@}*/
184
185 /***********************************************************************/
186 /** \name Macros to make printk easier */
187 /*@{*/
188
189 /**
190 * Error output.
191 *
192 * \param fmt printf() like format string.
193 * \param arg arguments
194 */
195 #define DRM_ERROR(fmt, ...) \
196 drm_err(__func__, fmt, ##__VA_ARGS__)
197
198 #define DRM_INFO(fmt, ...) \
199 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
200
201 /**
202 * Debug output.
203 *
204 * \param fmt printf() like format string.
205 * \param arg arguments
206 */
207 #if DRM_DEBUG_CODE
208 #define DRM_DEBUG(fmt, args...) \
209 do { \
210 drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, \
211 __func__, fmt, ##args); \
212 } while (0)
213
214 #define DRM_DEBUG_DRIVER(fmt, args...) \
215 do { \
216 drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME, \
217 __func__, fmt, ##args); \
218 } while (0)
219 #define DRM_DEBUG_KMS(fmt, args...) \
220 do { \
221 drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
222 __func__, fmt, ##args); \
223 } while (0)
224 #define DRM_DEBUG_PRIME(fmt, args...) \
225 do { \
226 drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
227 __func__, fmt, ##args); \
228 } while (0)
229 #define DRM_LOG(fmt, args...) \
230 do { \
231 drm_ut_debug_printk(DRM_UT_CORE, NULL, \
232 NULL, fmt, ##args); \
233 } while (0)
234 #define DRM_LOG_KMS(fmt, args...) \
235 do { \
236 drm_ut_debug_printk(DRM_UT_KMS, NULL, \
237 NULL, fmt, ##args); \
238 } while (0)
239 #define DRM_LOG_MODE(fmt, args...) \
240 do { \
241 drm_ut_debug_printk(DRM_UT_MODE, NULL, \
242 NULL, fmt, ##args); \
243 } while (0)
244 #define DRM_LOG_DRIVER(fmt, args...) \
245 do { \
246 drm_ut_debug_printk(DRM_UT_DRIVER, NULL, \
247 NULL, fmt, ##args); \
248 } while (0)
249 #else
250 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
251 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
252 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
253 #define DRM_DEBUG(fmt, arg...) do { } while (0)
254 #define DRM_LOG(fmt, arg...) do { } while (0)
255 #define DRM_LOG_KMS(fmt, args...) do { } while (0)
256 #define DRM_LOG_MODE(fmt, arg...) do { } while (0)
257 #define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
258
259 #endif
260
261 /*@}*/
262
263 /***********************************************************************/
264 /** \name Internal types and structures */
265 /*@{*/
266
267 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
268
269 #define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
270 #define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
271
272 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
273
274 /**
275 * Test that the hardware lock is held by the caller, returning otherwise.
276 *
277 * \param dev DRM device.
278 * \param filp file pointer of the caller.
279 */
280 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
281 do { \
282 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
283 _file_priv->master->lock.file_priv != _file_priv) { \
284 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
285 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
286 _file_priv->master->lock.file_priv, _file_priv); \
287 return -EINVAL; \
288 } \
289 } while (0)
290
291 /**
292 * Ioctl function type.
293 *
294 * \param inode device inode.
295 * \param file_priv DRM file private pointer.
296 * \param cmd command.
297 * \param arg argument.
298 */
299 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
300 struct drm_file *file_priv);
301
302 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
303 unsigned long arg);
304
305 #define DRM_IOCTL_NR(n) _IOC_NR(n)
306 #define DRM_MAJOR 226
307
308 #define DRM_AUTH 0x1
309 #define DRM_MASTER 0x2
310 #define DRM_ROOT_ONLY 0x4
311 #define DRM_CONTROL_ALLOW 0x8
312 #define DRM_UNLOCKED 0x10
313
314 struct drm_ioctl_desc {
315 unsigned int cmd;
316 int flags;
317 drm_ioctl_t *func;
318 unsigned int cmd_drv;
319 const char *name;
320 };
321
322 /**
323 * Creates a driver or general drm_ioctl_desc array entry for the given
324 * ioctl, for use by drm_ioctl().
325 */
326
327 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
328 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
329
330 struct drm_magic_entry {
331 struct list_head head;
332 struct drm_hash_item hash_item;
333 struct drm_file *priv;
334 };
335
336 struct drm_vma_entry {
337 struct list_head head;
338 struct vm_area_struct *vma;
339 pid_t pid;
340 };
341
342 /**
343 * DMA buffer.
344 */
345 struct drm_buf {
346 int idx; /**< Index into master buflist */
347 int total; /**< Buffer size */
348 int order; /**< log-base-2(total) */
349 int used; /**< Amount of buffer in use (for DMA) */
350 unsigned long offset; /**< Byte offset (used internally) */
351 void *address; /**< Address of buffer */
352 unsigned long bus_address; /**< Bus address of buffer */
353 struct drm_buf *next; /**< Kernel-only: used for free list */
354 __volatile__ int waiting; /**< On kernel DMA queue */
355 __volatile__ int pending; /**< On hardware DMA queue */
356 struct drm_file *file_priv; /**< Private of holding file descr */
357 int context; /**< Kernel queue for this buffer */
358 int while_locked; /**< Dispatch this buffer while locked */
359 enum {
360 DRM_LIST_NONE = 0,
361 DRM_LIST_FREE = 1,
362 DRM_LIST_WAIT = 2,
363 DRM_LIST_PEND = 3,
364 DRM_LIST_PRIO = 4,
365 DRM_LIST_RECLAIM = 5
366 } list; /**< Which list we're on */
367
368 int dev_priv_size; /**< Size of buffer private storage */
369 void *dev_private; /**< Per-buffer private storage */
370 };
371
372 /** bufs is one longer than it has to be */
373 struct drm_waitlist {
374 int count; /**< Number of possible buffers */
375 struct drm_buf **bufs; /**< List of pointers to buffers */
376 struct drm_buf **rp; /**< Read pointer */
377 struct drm_buf **wp; /**< Write pointer */
378 struct drm_buf **end; /**< End pointer */
379 spinlock_t read_lock;
380 spinlock_t write_lock;
381 };
382
383 struct drm_freelist {
384 int initialized; /**< Freelist in use */
385 atomic_t count; /**< Number of free buffers */
386 struct drm_buf *next; /**< End pointer */
387
388 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
389 int low_mark; /**< Low water mark */
390 int high_mark; /**< High water mark */
391 atomic_t wfh; /**< If waiting for high mark */
392 spinlock_t lock;
393 };
394
395 typedef struct drm_dma_handle {
396 dma_addr_t busaddr;
397 void *vaddr;
398 size_t size;
399 } drm_dma_handle_t;
400
401 /**
402 * Buffer entry. There is one of this for each buffer size order.
403 */
404 struct drm_buf_entry {
405 int buf_size; /**< size */
406 int buf_count; /**< number of buffers */
407 struct drm_buf *buflist; /**< buffer list */
408 int seg_count;
409 int page_order;
410 struct drm_dma_handle **seglist;
411
412 struct drm_freelist freelist;
413 };
414
415 /* Event queued up for userspace to read */
416 struct drm_pending_event {
417 struct drm_event *event;
418 struct list_head link;
419 struct drm_file *file_priv;
420 pid_t pid; /* pid of requester, no guarantee it's valid by the time
421 we deliver the event, for tracing only */
422 void (*destroy)(struct drm_pending_event *event);
423 };
424
425 /* initial implementaton using a linked list - todo hashtab */
426 struct drm_prime_file_private {
427 struct list_head head;
428 struct mutex lock;
429 };
430
431 /** File private data */
432 struct drm_file {
433 int authenticated;
434 struct pid *pid;
435 kuid_t uid;
436 drm_magic_t magic;
437 unsigned long ioctl_count;
438 struct list_head lhead;
439 struct drm_minor *minor;
440 unsigned long lock_count;
441
442 /** Mapping of mm object handles to object pointers. */
443 struct idr object_idr;
444 /** Lock for synchronization of access to object_idr. */
445 spinlock_t table_lock;
446
447 struct file *filp;
448 void *driver_priv;
449
450 int is_master; /* this file private is a master for a minor */
451 struct drm_master *master; /* master this node is currently associated with
452 N.B. not always minor->master */
453
454 /**
455 * fbs - List of framebuffers associated with this file.
456 *
457 * Protected by fbs_lock. Note that the fbs list holds a reference on
458 * the fb object to prevent it from untimely disappearing.
459 */
460 struct list_head fbs;
461 struct mutex fbs_lock;
462
463 wait_queue_head_t event_wait;
464 struct list_head event_list;
465 int event_space;
466
467 struct drm_prime_file_private prime;
468 };
469
470 /** Wait queue */
471 struct drm_queue {
472 atomic_t use_count; /**< Outstanding uses (+1) */
473 atomic_t finalization; /**< Finalization in progress */
474 atomic_t block_count; /**< Count of processes waiting */
475 atomic_t block_read; /**< Queue blocked for reads */
476 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
477 atomic_t block_write; /**< Queue blocked for writes */
478 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
479 atomic_t total_queued; /**< Total queued statistic */
480 atomic_t total_flushed; /**< Total flushes statistic */
481 atomic_t total_locks; /**< Total locks statistics */
482 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
483 struct drm_waitlist waitlist; /**< Pending buffers */
484 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
485 };
486
487 /**
488 * Lock data.
489 */
490 struct drm_lock_data {
491 struct drm_hw_lock *hw_lock; /**< Hardware lock */
492 /** Private of lock holder's file (NULL=kernel) */
493 struct drm_file *file_priv;
494 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
495 unsigned long lock_time; /**< Time of last lock in jiffies */
496 spinlock_t spinlock;
497 uint32_t kernel_waiters;
498 uint32_t user_waiters;
499 int idle_has_lock;
500 };
501
502 /**
503 * DMA data.
504 */
505 struct drm_device_dma {
506
507 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
508 int buf_count; /**< total number of buffers */
509 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
510 int seg_count;
511 int page_count; /**< number of pages */
512 unsigned long *pagelist; /**< page list */
513 unsigned long byte_count;
514 enum {
515 _DRM_DMA_USE_AGP = 0x01,
516 _DRM_DMA_USE_SG = 0x02,
517 _DRM_DMA_USE_FB = 0x04,
518 _DRM_DMA_USE_PCI_RO = 0x08
519 } flags;
520
521 };
522
523 /**
524 * AGP memory entry. Stored as a doubly linked list.
525 */
526 struct drm_agp_mem {
527 unsigned long handle; /**< handle */
528 DRM_AGP_MEM *memory;
529 unsigned long bound; /**< address */
530 int pages;
531 struct list_head head;
532 };
533
534 /**
535 * AGP data.
536 *
537 * \sa drm_agp_init() and drm_device::agp.
538 */
539 struct drm_agp_head {
540 DRM_AGP_KERN agp_info; /**< AGP device information */
541 struct list_head memory;
542 unsigned long mode; /**< AGP mode */
543 struct agp_bridge_data *bridge;
544 int enabled; /**< whether the AGP bus as been enabled */
545 int acquired; /**< whether the AGP device has been acquired */
546 unsigned long base;
547 int agp_mtrr;
548 int cant_use_aperture;
549 unsigned long page_mask;
550 };
551
552 /**
553 * Scatter-gather memory.
554 */
555 struct drm_sg_mem {
556 unsigned long handle;
557 void *virtual;
558 int pages;
559 struct page **pagelist;
560 dma_addr_t *busaddr;
561 };
562
563 struct drm_sigdata {
564 int context;
565 struct drm_hw_lock *lock;
566 };
567
568
569 /**
570 * Kernel side of a mapping
571 */
572 struct drm_local_map {
573 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
574 unsigned long size; /**< Requested physical size (bytes) */
575 enum drm_map_type type; /**< Type of memory to map */
576 enum drm_map_flags flags; /**< Flags */
577 void *handle; /**< User-space: "Handle" to pass to mmap() */
578 /**< Kernel-space: kernel-virtual address */
579 int mtrr; /**< MTRR slot used */
580 };
581
582 typedef struct drm_local_map drm_local_map_t;
583
584 /**
585 * Mappings list
586 */
587 struct drm_map_list {
588 struct list_head head; /**< list head */
589 struct drm_hash_item hash;
590 struct drm_local_map *map; /**< mapping */
591 uint64_t user_token;
592 struct drm_master *master;
593 struct drm_mm_node *file_offset_node; /**< fake offset */
594 };
595
596 /**
597 * Context handle list
598 */
599 struct drm_ctx_list {
600 struct list_head head; /**< list head */
601 drm_context_t handle; /**< context handle */
602 struct drm_file *tag; /**< associated fd private data */
603 };
604
605 /* location of GART table */
606 #define DRM_ATI_GART_MAIN 1
607 #define DRM_ATI_GART_FB 2
608
609 #define DRM_ATI_GART_PCI 1
610 #define DRM_ATI_GART_PCIE 2
611 #define DRM_ATI_GART_IGP 3
612
613 struct drm_ati_pcigart_info {
614 int gart_table_location;
615 int gart_reg_if;
616 void *addr;
617 dma_addr_t bus_addr;
618 dma_addr_t table_mask;
619 struct drm_dma_handle *table_handle;
620 struct drm_local_map mapping;
621 int table_size;
622 };
623
624 /**
625 * GEM specific mm private for tracking GEM objects
626 */
627 struct drm_gem_mm {
628 struct drm_mm offset_manager; /**< Offset mgmt for buffer objects */
629 struct drm_open_hash offset_hash; /**< User token hash table for maps */
630 };
631
632 /**
633 * This structure defines the drm_mm memory object, which will be used by the
634 * DRM for its buffer objects.
635 */
636 struct drm_gem_object {
637 /** Reference count of this object */
638 struct kref refcount;
639
640 /** Handle count of this object. Each handle also holds a reference */
641 atomic_t handle_count; /* number of handles on this object */
642
643 /** Related drm device */
644 struct drm_device *dev;
645
646 /** File representing the shmem storage */
647 struct file *filp;
648
649 /* Mapping info for this object */
650 struct drm_map_list map_list;
651
652 /**
653 * Size of the object, in bytes. Immutable over the object's
654 * lifetime.
655 */
656 size_t size;
657
658 /**
659 * Global name for this object, starts at 1. 0 means unnamed.
660 * Access is covered by the object_name_lock in the related drm_device
661 */
662 int name;
663
664 /**
665 * Memory domains. These monitor which caches contain read/write data
666 * related to the object. When transitioning from one set of domains
667 * to another, the driver is called to ensure that caches are suitably
668 * flushed and invalidated
669 */
670 uint32_t read_domains;
671 uint32_t write_domain;
672
673 /**
674 * While validating an exec operation, the
675 * new read/write domain values are computed here.
676 * They will be transferred to the above values
677 * at the point that any cache flushing occurs
678 */
679 uint32_t pending_read_domains;
680 uint32_t pending_write_domain;
681
682 void *driver_private;
683
684 /* dma buf exported from this GEM object */
685 struct dma_buf *export_dma_buf;
686
687 /* dma buf attachment backing this object */
688 struct dma_buf_attachment *import_attach;
689 };
690
691 #include <drm/drm_crtc.h>
692
693 /* per-master structure */
694 struct drm_master {
695
696 struct kref refcount; /* refcount for this master */
697
698 struct list_head head; /**< each minor contains a list of masters */
699 struct drm_minor *minor; /**< link back to minor we are a master for */
700
701 char *unique; /**< Unique identifier: e.g., busid */
702 int unique_len; /**< Length of unique field */
703 int unique_size; /**< amount allocated */
704
705 int blocked; /**< Blocked due to VC switch? */
706
707 /** \name Authentication */
708 /*@{ */
709 struct drm_open_hash magiclist;
710 struct list_head magicfree;
711 /*@} */
712
713 struct drm_lock_data lock; /**< Information on hardware lock */
714
715 void *driver_priv; /**< Private structure for driver to use */
716 };
717
718 /* Size of ringbuffer for vblank timestamps. Just double-buffer
719 * in initial implementation.
720 */
721 #define DRM_VBLANKTIME_RBSIZE 2
722
723 /* Flags and return codes for get_vblank_timestamp() driver function. */
724 #define DRM_CALLED_FROM_VBLIRQ 1
725 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
726 #define DRM_VBLANKTIME_INVBL (1 << 1)
727
728 /* get_scanout_position() return flags */
729 #define DRM_SCANOUTPOS_VALID (1 << 0)
730 #define DRM_SCANOUTPOS_INVBL (1 << 1)
731 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
732
733 struct drm_bus {
734 int bus_type;
735 int (*get_irq)(struct drm_device *dev);
736 const char *(*get_name)(struct drm_device *dev);
737 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
738 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
739 struct drm_unique *unique);
740 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
741 /* hooks that are for PCI */
742 int (*agp_init)(struct drm_device *dev);
743
744 };
745
746 /**
747 * DRM driver structure. This structure represent the common code for
748 * a family of cards. There will one drm_device for each card present
749 * in this family
750 */
751 struct drm_driver {
752 int (*load) (struct drm_device *, unsigned long flags);
753 int (*firstopen) (struct drm_device *);
754 int (*open) (struct drm_device *, struct drm_file *);
755 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
756 void (*postclose) (struct drm_device *, struct drm_file *);
757 void (*lastclose) (struct drm_device *);
758 int (*unload) (struct drm_device *);
759 int (*suspend) (struct drm_device *, pm_message_t state);
760 int (*resume) (struct drm_device *);
761 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
762 int (*dma_quiescent) (struct drm_device *);
763 int (*context_dtor) (struct drm_device *dev, int context);
764
765 /**
766 * get_vblank_counter - get raw hardware vblank counter
767 * @dev: DRM device
768 * @crtc: counter to fetch
769 *
770 * Driver callback for fetching a raw hardware vblank counter for @crtc.
771 * If a device doesn't have a hardware counter, the driver can simply
772 * return the value of drm_vblank_count. The DRM core will account for
773 * missed vblank events while interrupts where disabled based on system
774 * timestamps.
775 *
776 * Wraparound handling and loss of events due to modesetting is dealt
777 * with in the DRM core code.
778 *
779 * RETURNS
780 * Raw vblank counter value.
781 */
782 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
783
784 /**
785 * enable_vblank - enable vblank interrupt events
786 * @dev: DRM device
787 * @crtc: which irq to enable
788 *
789 * Enable vblank interrupts for @crtc. If the device doesn't have
790 * a hardware vblank counter, this routine should be a no-op, since
791 * interrupts will have to stay on to keep the count accurate.
792 *
793 * RETURNS
794 * Zero on success, appropriate errno if the given @crtc's vblank
795 * interrupt cannot be enabled.
796 */
797 int (*enable_vblank) (struct drm_device *dev, int crtc);
798
799 /**
800 * disable_vblank - disable vblank interrupt events
801 * @dev: DRM device
802 * @crtc: which irq to enable
803 *
804 * Disable vblank interrupts for @crtc. If the device doesn't have
805 * a hardware vblank counter, this routine should be a no-op, since
806 * interrupts will have to stay on to keep the count accurate.
807 */
808 void (*disable_vblank) (struct drm_device *dev, int crtc);
809
810 /**
811 * Called by \c drm_device_is_agp. Typically used to determine if a
812 * card is really attached to AGP or not.
813 *
814 * \param dev DRM device handle
815 *
816 * \returns
817 * One of three values is returned depending on whether or not the
818 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
819 * (return of 1), or may or may not be AGP (return of 2).
820 */
821 int (*device_is_agp) (struct drm_device *dev);
822
823 /**
824 * Called by vblank timestamping code.
825 *
826 * Return the current display scanout position from a crtc.
827 *
828 * \param dev DRM device.
829 * \param crtc Id of the crtc to query.
830 * \param *vpos Target location for current vertical scanout position.
831 * \param *hpos Target location for current horizontal scanout position.
832 *
833 * Returns vpos as a positive number while in active scanout area.
834 * Returns vpos as a negative number inside vblank, counting the number
835 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
836 * until start of active scanout / end of vblank."
837 *
838 * \return Flags, or'ed together as follows:
839 *
840 * DRM_SCANOUTPOS_VALID = Query successful.
841 * DRM_SCANOUTPOS_INVBL = Inside vblank.
842 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
843 * this flag means that returned position may be offset by a constant
844 * but unknown small number of scanlines wrt. real scanout position.
845 *
846 */
847 int (*get_scanout_position) (struct drm_device *dev, int crtc,
848 int *vpos, int *hpos);
849
850 /**
851 * Called by \c drm_get_last_vbltimestamp. Should return a precise
852 * timestamp when the most recent VBLANK interval ended or will end.
853 *
854 * Specifically, the timestamp in @vblank_time should correspond as
855 * closely as possible to the time when the first video scanline of
856 * the video frame after the end of VBLANK will start scanning out,
857 * the time immediately after end of the VBLANK interval. If the
858 * @crtc is currently inside VBLANK, this will be a time in the future.
859 * If the @crtc is currently scanning out a frame, this will be the
860 * past start time of the current scanout. This is meant to adhere
861 * to the OpenML OML_sync_control extension specification.
862 *
863 * \param dev dev DRM device handle.
864 * \param crtc crtc for which timestamp should be returned.
865 * \param *max_error Maximum allowable timestamp error in nanoseconds.
866 * Implementation should strive to provide timestamp
867 * with an error of at most *max_error nanoseconds.
868 * Returns true upper bound on error for timestamp.
869 * \param *vblank_time Target location for returned vblank timestamp.
870 * \param flags 0 = Defaults, no special treatment needed.
871 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
872 * irq handler. Some drivers need to apply some workarounds
873 * for gpu-specific vblank irq quirks if flag is set.
874 *
875 * \returns
876 * Zero if timestamping isn't supported in current display mode or a
877 * negative number on failure. A positive status code on success,
878 * which describes how the vblank_time timestamp was computed.
879 */
880 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
881 int *max_error,
882 struct timeval *vblank_time,
883 unsigned flags);
884
885 /* these have to be filled in */
886
887 irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
888 void (*irq_preinstall) (struct drm_device *dev);
889 int (*irq_postinstall) (struct drm_device *dev);
890 void (*irq_uninstall) (struct drm_device *dev);
891 void (*set_version) (struct drm_device *dev,
892 struct drm_set_version *sv);
893
894 /* Master routines */
895 int (*master_create)(struct drm_device *dev, struct drm_master *master);
896 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
897 /**
898 * master_set is called whenever the minor master is set.
899 * master_drop is called whenever the minor master is dropped.
900 */
901
902 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
903 bool from_open);
904 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
905 bool from_release);
906
907 int (*debugfs_init)(struct drm_minor *minor);
908 void (*debugfs_cleanup)(struct drm_minor *minor);
909
910 /**
911 * Driver-specific constructor for drm_gem_objects, to set up
912 * obj->driver_private.
913 *
914 * Returns 0 on success.
915 */
916 int (*gem_init_object) (struct drm_gem_object *obj);
917 void (*gem_free_object) (struct drm_gem_object *obj);
918 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
919 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
920
921 /* prime: */
922 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
923 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
924 uint32_t handle, uint32_t flags, int *prime_fd);
925 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
926 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
927 int prime_fd, uint32_t *handle);
928 /* export GEM -> dmabuf */
929 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
930 struct drm_gem_object *obj, int flags);
931 /* import dmabuf -> GEM */
932 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
933 struct dma_buf *dma_buf);
934 /* low-level interface used by drm_gem_prime_{import,export} */
935 int (*gem_prime_pin)(struct drm_gem_object *obj);
936 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
937 struct drm_gem_object *(*gem_prime_import_sg_table)(
938 struct drm_device *dev, size_t size,
939 struct sg_table *sgt);
940 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
941 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
942
943 /* vga arb irq handler */
944 void (*vgaarb_irq)(struct drm_device *dev, bool state);
945
946 /* dumb alloc support */
947 int (*dumb_create)(struct drm_file *file_priv,
948 struct drm_device *dev,
949 struct drm_mode_create_dumb *args);
950 int (*dumb_map_offset)(struct drm_file *file_priv,
951 struct drm_device *dev, uint32_t handle,
952 uint64_t *offset);
953 int (*dumb_destroy)(struct drm_file *file_priv,
954 struct drm_device *dev,
955 uint32_t handle);
956
957 /* Driver private ops for this object */
958 const struct vm_operations_struct *gem_vm_ops;
959
960 int major;
961 int minor;
962 int patchlevel;
963 char *name;
964 char *desc;
965 char *date;
966
967 u32 driver_features;
968 int dev_priv_size;
969 struct drm_ioctl_desc *ioctls;
970 int num_ioctls;
971 const struct file_operations *fops;
972 union {
973 struct pci_driver *pci;
974 struct platform_device *platform_device;
975 struct usb_driver *usb;
976 } kdriver;
977 struct drm_bus *bus;
978
979 /* List of devices hanging off this driver */
980 struct list_head device_list;
981 };
982
983 #define DRM_MINOR_UNASSIGNED 0
984 #define DRM_MINOR_LEGACY 1
985 #define DRM_MINOR_CONTROL 2
986 #define DRM_MINOR_RENDER 3
987
988
989 /**
990 * debugfs node list. This structure represents a debugfs file to
991 * be created by the drm core
992 */
993 struct drm_debugfs_list {
994 const char *name; /** file name */
995 int (*show)(struct seq_file*, void*); /** show callback */
996 u32 driver_features; /**< Required driver features for this entry */
997 };
998
999 /**
1000 * debugfs node structure. This structure represents a debugfs file.
1001 */
1002 struct drm_debugfs_node {
1003 struct list_head list;
1004 struct drm_minor *minor;
1005 struct drm_debugfs_list *debugfs_ent;
1006 struct dentry *dent;
1007 };
1008
1009 /**
1010 * Info file list entry. This structure represents a debugfs or proc file to
1011 * be created by the drm core
1012 */
1013 struct drm_info_list {
1014 const char *name; /** file name */
1015 int (*show)(struct seq_file*, void*); /** show callback */
1016 u32 driver_features; /**< Required driver features for this entry */
1017 void *data;
1018 };
1019
1020 /**
1021 * debugfs node structure. This structure represents a debugfs file.
1022 */
1023 struct drm_info_node {
1024 struct list_head list;
1025 struct drm_minor *minor;
1026 const struct drm_info_list *info_ent;
1027 struct dentry *dent;
1028 };
1029
1030 /**
1031 * DRM minor structure. This structure represents a drm minor number.
1032 */
1033 struct drm_minor {
1034 int index; /**< Minor device number */
1035 int type; /**< Control or render */
1036 dev_t device; /**< Device number for mknod */
1037 struct device kdev; /**< Linux device */
1038 struct drm_device *dev;
1039
1040 struct proc_dir_entry *proc_root; /**< proc directory entry */
1041 struct drm_info_node proc_nodes;
1042 struct dentry *debugfs_root;
1043
1044 struct list_head debugfs_list;
1045 struct mutex debugfs_lock; /* Protects debugfs_list. */
1046
1047 struct drm_master *master; /* currently active master for this node */
1048 struct list_head master_list;
1049 struct drm_mode_group mode_group;
1050 };
1051
1052 /* mode specified on the command line */
1053 struct drm_cmdline_mode {
1054 bool specified;
1055 bool refresh_specified;
1056 bool bpp_specified;
1057 int xres, yres;
1058 int bpp;
1059 int refresh;
1060 bool rb;
1061 bool interlace;
1062 bool cvt;
1063 bool margins;
1064 enum drm_connector_force force;
1065 };
1066
1067
1068 struct drm_pending_vblank_event {
1069 struct drm_pending_event base;
1070 int pipe;
1071 struct drm_event_vblank event;
1072 };
1073
1074 /**
1075 * DRM device structure. This structure represent a complete card that
1076 * may contain multiple heads.
1077 */
1078 struct drm_device {
1079 struct list_head driver_item; /**< list of devices per driver */
1080 char *devname; /**< For /proc/interrupts */
1081 int if_version; /**< Highest interface version set */
1082
1083 /** \name Locks */
1084 /*@{ */
1085 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1086 struct mutex struct_mutex; /**< For others */
1087 /*@} */
1088
1089 /** \name Usage Counters */
1090 /*@{ */
1091 int open_count; /**< Outstanding files open */
1092 atomic_t ioctl_count; /**< Outstanding IOCTLs pending */
1093 atomic_t vma_count; /**< Outstanding vma areas open */
1094 int buf_use; /**< Buffers in use -- cannot alloc */
1095 atomic_t buf_alloc; /**< Buffer allocation in progress */
1096 /*@} */
1097
1098 /** \name Performance counters */
1099 /*@{ */
1100 unsigned long counters;
1101 enum drm_stat_type types[15];
1102 atomic_t counts[15];
1103 /*@} */
1104
1105 struct list_head filelist;
1106
1107 /** \name Memory management */
1108 /*@{ */
1109 struct list_head maplist; /**< Linked list of regions */
1110 int map_count; /**< Number of mappable regions */
1111 struct drm_open_hash map_hash; /**< User token hash table for maps */
1112
1113 /** \name Context handle management */
1114 /*@{ */
1115 struct list_head ctxlist; /**< Linked list of context handles */
1116 int ctx_count; /**< Number of context handles */
1117 struct mutex ctxlist_mutex; /**< For ctxlist */
1118
1119 struct idr ctx_idr;
1120
1121 struct list_head vmalist; /**< List of vmas (for debugging) */
1122
1123 /*@} */
1124
1125 /** \name DMA support */
1126 /*@{ */
1127 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1128 /*@} */
1129
1130 /** \name Context support */
1131 /*@{ */
1132 int irq_enabled; /**< True if irq handler is enabled */
1133 __volatile__ long context_flag; /**< Context swapping flag */
1134 __volatile__ long interrupt_flag; /**< Interruption handler flag */
1135 __volatile__ long dma_flag; /**< DMA dispatch flag */
1136 wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
1137 int last_checked; /**< Last context checked for DMA */
1138 int last_context; /**< Last current context */
1139 unsigned long last_switch; /**< jiffies at last context switch */
1140 /*@} */
1141
1142 struct work_struct work;
1143 /** \name VBLANK IRQ support */
1144 /*@{ */
1145
1146 /*
1147 * At load time, disabling the vblank interrupt won't be allowed since
1148 * old clients may not call the modeset ioctl and therefore misbehave.
1149 * Once the modeset ioctl *has* been called though, we can safely
1150 * disable them when unused.
1151 */
1152 int vblank_disable_allowed;
1153
1154 wait_queue_head_t *vbl_queue; /**< VBLANK wait queue */
1155 atomic_t *_vblank_count; /**< number of VBLANK interrupts (driver must alloc the right number of counters) */
1156 struct timeval *_vblank_time; /**< timestamp of current vblank_count (drivers must alloc right number of fields) */
1157 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1158 spinlock_t vbl_lock;
1159 atomic_t *vblank_refcount; /* number of users of vblank interruptsper crtc */
1160 u32 *last_vblank; /* protected by dev->vbl_lock, used */
1161 /* for wraparound handling */
1162 int *vblank_enabled; /* so we don't call enable more than
1163 once per disable */
1164 int *vblank_inmodeset; /* Display driver is setting mode */
1165 u32 *last_vblank_wait; /* Last vblank seqno waited per CRTC */
1166 struct timer_list vblank_disable_timer;
1167
1168 u32 max_vblank_count; /**< size of vblank counter register */
1169
1170 /**
1171 * List of events
1172 */
1173 struct list_head vblank_event_list;
1174 spinlock_t event_lock;
1175
1176 /*@} */
1177 cycles_t ctx_start;
1178 cycles_t lck_start;
1179
1180 struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */
1181 wait_queue_head_t buf_readers; /**< Processes waiting to read */
1182 wait_queue_head_t buf_writers; /**< Processes waiting to ctx switch */
1183
1184 struct drm_agp_head *agp; /**< AGP data */
1185
1186 struct device *dev; /**< Device structure */
1187 struct pci_dev *pdev; /**< PCI device structure */
1188 int pci_vendor; /**< PCI vendor id */
1189 int pci_device; /**< PCI device id */
1190 #ifdef __alpha__
1191 struct pci_controller *hose;
1192 #endif
1193
1194 struct platform_device *platformdev; /**< Platform device struture */
1195 struct usb_device *usbdev;
1196
1197 struct drm_sg_mem *sg; /**< Scatter gather memory */
1198 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1199 void *dev_private; /**< device private data */
1200 void *mm_private;
1201 struct address_space *dev_mapping;
1202 struct drm_sigdata sigdata; /**< For block_all_signals */
1203 sigset_t sigmask;
1204
1205 struct drm_driver *driver;
1206 struct drm_local_map *agp_buffer_map;
1207 unsigned int agp_buffer_token;
1208 struct drm_minor *control; /**< Control node for card */
1209 struct drm_minor *primary; /**< render type primary screen head */
1210
1211 struct drm_mode_config mode_config; /**< Current mode config */
1212
1213 /** \name GEM information */
1214 /*@{ */
1215 spinlock_t object_name_lock;
1216 struct idr object_name_idr;
1217 /*@} */
1218 int switch_power_state;
1219
1220 atomic_t unplugged; /* device has been unplugged or gone away */
1221 };
1222
1223 #define DRM_SWITCH_POWER_ON 0
1224 #define DRM_SWITCH_POWER_OFF 1
1225 #define DRM_SWITCH_POWER_CHANGING 2
1226
drm_core_check_feature(struct drm_device * dev,int feature)1227 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1228 int feature)
1229 {
1230 return ((dev->driver->driver_features & feature) ? 1 : 0);
1231 }
1232
drm_dev_to_irq(struct drm_device * dev)1233 static inline int drm_dev_to_irq(struct drm_device *dev)
1234 {
1235 return dev->driver->bus->get_irq(dev);
1236 }
1237
1238
1239 #if __OS_HAS_AGP
drm_core_has_AGP(struct drm_device * dev)1240 static inline int drm_core_has_AGP(struct drm_device *dev)
1241 {
1242 return drm_core_check_feature(dev, DRIVER_USE_AGP);
1243 }
1244 #else
1245 #define drm_core_has_AGP(dev) (0)
1246 #endif
1247
1248 #if __OS_HAS_MTRR
drm_core_has_MTRR(struct drm_device * dev)1249 static inline int drm_core_has_MTRR(struct drm_device *dev)
1250 {
1251 return drm_core_check_feature(dev, DRIVER_USE_MTRR);
1252 }
1253
1254 #define DRM_MTRR_WC MTRR_TYPE_WRCOMB
1255
drm_mtrr_add(unsigned long offset,unsigned long size,unsigned int flags)1256 static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1257 unsigned int flags)
1258 {
1259 return mtrr_add(offset, size, flags, 1);
1260 }
1261
drm_mtrr_del(int handle,unsigned long offset,unsigned long size,unsigned int flags)1262 static inline int drm_mtrr_del(int handle, unsigned long offset,
1263 unsigned long size, unsigned int flags)
1264 {
1265 return mtrr_del(handle, offset, size);
1266 }
1267
1268 #else
1269 #define drm_core_has_MTRR(dev) (0)
1270
1271 #define DRM_MTRR_WC 0
1272
drm_mtrr_add(unsigned long offset,unsigned long size,unsigned int flags)1273 static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1274 unsigned int flags)
1275 {
1276 return 0;
1277 }
1278
drm_mtrr_del(int handle,unsigned long offset,unsigned long size,unsigned int flags)1279 static inline int drm_mtrr_del(int handle, unsigned long offset,
1280 unsigned long size, unsigned int flags)
1281 {
1282 return 0;
1283 }
1284 #endif
1285
drm_device_set_unplugged(struct drm_device * dev)1286 static inline void drm_device_set_unplugged(struct drm_device *dev)
1287 {
1288 smp_wmb();
1289 atomic_set(&dev->unplugged, 1);
1290 }
1291
drm_device_is_unplugged(struct drm_device * dev)1292 static inline int drm_device_is_unplugged(struct drm_device *dev)
1293 {
1294 int ret = atomic_read(&dev->unplugged);
1295 smp_rmb();
1296 return ret;
1297 }
1298
drm_modeset_is_locked(struct drm_device * dev)1299 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1300 {
1301 return mutex_is_locked(&dev->mode_config.mutex);
1302 }
1303
1304 /******************************************************************/
1305 /** \name Internal function definitions */
1306 /*@{*/
1307
1308 /* Driver support (drm_drv.h) */
1309 extern long drm_ioctl(struct file *filp,
1310 unsigned int cmd, unsigned long arg);
1311 extern long drm_compat_ioctl(struct file *filp,
1312 unsigned int cmd, unsigned long arg);
1313 extern int drm_lastclose(struct drm_device *dev);
1314
1315 /* Device support (drm_fops.h) */
1316 extern struct mutex drm_global_mutex;
1317 extern int drm_open(struct inode *inode, struct file *filp);
1318 extern int drm_stub_open(struct inode *inode, struct file *filp);
1319 extern int drm_fasync(int fd, struct file *filp, int on);
1320 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1321 size_t count, loff_t *offset);
1322 extern int drm_release(struct inode *inode, struct file *filp);
1323
1324 /* Mapping support (drm_vm.h) */
1325 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1326 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1327 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1328 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1329 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1330
1331 /* Memory management support (drm_memory.h) */
1332 #include <drm/drm_memory.h>
1333 extern void drm_free_agp(DRM_AGP_MEM * handle, int pages);
1334 extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
1335 extern DRM_AGP_MEM *drm_agp_bind_pages(struct drm_device *dev,
1336 struct page **pages,
1337 unsigned long num_pages,
1338 uint32_t gtt_offset,
1339 uint32_t type);
1340 extern int drm_unbind_agp(DRM_AGP_MEM * handle);
1341
1342 /* Misc. IOCTL support (drm_ioctl.h) */
1343 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1344 struct drm_file *file_priv);
1345 extern int drm_getunique(struct drm_device *dev, void *data,
1346 struct drm_file *file_priv);
1347 extern int drm_setunique(struct drm_device *dev, void *data,
1348 struct drm_file *file_priv);
1349 extern int drm_getmap(struct drm_device *dev, void *data,
1350 struct drm_file *file_priv);
1351 extern int drm_getclient(struct drm_device *dev, void *data,
1352 struct drm_file *file_priv);
1353 extern int drm_getstats(struct drm_device *dev, void *data,
1354 struct drm_file *file_priv);
1355 extern int drm_getcap(struct drm_device *dev, void *data,
1356 struct drm_file *file_priv);
1357 extern int drm_setversion(struct drm_device *dev, void *data,
1358 struct drm_file *file_priv);
1359 extern int drm_noop(struct drm_device *dev, void *data,
1360 struct drm_file *file_priv);
1361
1362 /* Context IOCTL support (drm_context.h) */
1363 extern int drm_resctx(struct drm_device *dev, void *data,
1364 struct drm_file *file_priv);
1365 extern int drm_addctx(struct drm_device *dev, void *data,
1366 struct drm_file *file_priv);
1367 extern int drm_modctx(struct drm_device *dev, void *data,
1368 struct drm_file *file_priv);
1369 extern int drm_getctx(struct drm_device *dev, void *data,
1370 struct drm_file *file_priv);
1371 extern int drm_switchctx(struct drm_device *dev, void *data,
1372 struct drm_file *file_priv);
1373 extern int drm_newctx(struct drm_device *dev, void *data,
1374 struct drm_file *file_priv);
1375 extern int drm_rmctx(struct drm_device *dev, void *data,
1376 struct drm_file *file_priv);
1377
1378 extern int drm_ctxbitmap_init(struct drm_device *dev);
1379 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1380 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1381
1382 extern int drm_setsareactx(struct drm_device *dev, void *data,
1383 struct drm_file *file_priv);
1384 extern int drm_getsareactx(struct drm_device *dev, void *data,
1385 struct drm_file *file_priv);
1386
1387 /* Authentication IOCTL support (drm_auth.h) */
1388 extern int drm_getmagic(struct drm_device *dev, void *data,
1389 struct drm_file *file_priv);
1390 extern int drm_authmagic(struct drm_device *dev, void *data,
1391 struct drm_file *file_priv);
1392 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1393
1394 /* Cache management (drm_cache.c) */
1395 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1396 void drm_clflush_sg(struct sg_table *st);
1397 void drm_clflush_virt_range(char *addr, unsigned long length);
1398
1399 /* Locking IOCTL support (drm_lock.h) */
1400 extern int drm_lock(struct drm_device *dev, void *data,
1401 struct drm_file *file_priv);
1402 extern int drm_unlock(struct drm_device *dev, void *data,
1403 struct drm_file *file_priv);
1404 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1405 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1406 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1407
1408 /*
1409 * These are exported to drivers so that they can implement fencing using
1410 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1411 */
1412
1413 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1414
1415 /* Buffer management support (drm_bufs.h) */
1416 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1417 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1418 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1419 unsigned int size, enum drm_map_type type,
1420 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1421 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1422 struct drm_file *file_priv);
1423 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1424 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1425 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1426 struct drm_file *file_priv);
1427 extern int drm_addbufs(struct drm_device *dev, void *data,
1428 struct drm_file *file_priv);
1429 extern int drm_infobufs(struct drm_device *dev, void *data,
1430 struct drm_file *file_priv);
1431 extern int drm_markbufs(struct drm_device *dev, void *data,
1432 struct drm_file *file_priv);
1433 extern int drm_freebufs(struct drm_device *dev, void *data,
1434 struct drm_file *file_priv);
1435 extern int drm_mapbufs(struct drm_device *dev, void *data,
1436 struct drm_file *file_priv);
1437 extern int drm_order(unsigned long size);
1438
1439 /* DMA support (drm_dma.h) */
1440 extern int drm_dma_setup(struct drm_device *dev);
1441 extern void drm_dma_takedown(struct drm_device *dev);
1442 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1443 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1444 struct drm_file *filp);
1445
1446 /* IRQ support (drm_irq.h) */
1447 extern int drm_control(struct drm_device *dev, void *data,
1448 struct drm_file *file_priv);
1449 extern int drm_irq_install(struct drm_device *dev);
1450 extern int drm_irq_uninstall(struct drm_device *dev);
1451
1452 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1453 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1454 struct drm_file *filp);
1455 extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
1456 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1457 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1458 struct timeval *vblanktime);
1459 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1460 struct drm_pending_vblank_event *e);
1461 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1462 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1463 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1464 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1465 extern void drm_vblank_cleanup(struct drm_device *dev);
1466 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1467 struct timeval *tvblank, unsigned flags);
1468 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1469 int crtc, int *max_error,
1470 struct timeval *vblank_time,
1471 unsigned flags,
1472 struct drm_crtc *refcrtc);
1473 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);
1474
1475 extern bool
1476 drm_mode_parse_command_line_for_connector(const char *mode_option,
1477 struct drm_connector *connector,
1478 struct drm_cmdline_mode *mode);
1479
1480 extern struct drm_display_mode *
1481 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1482 struct drm_cmdline_mode *cmd);
1483
1484 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1485 struct drm_display_mode *dmode);
1486 extern int of_get_drm_display_mode(struct device_node *np,
1487 struct drm_display_mode *dmode,
1488 int index);
1489
1490 /* Modesetting support */
1491 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1492 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1493 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1494 struct drm_file *file_priv);
1495
1496 /* AGP/GART support (drm_agpsupport.h) */
1497 extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
1498 extern int drm_agp_acquire(struct drm_device *dev);
1499 extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
1500 struct drm_file *file_priv);
1501 extern int drm_agp_release(struct drm_device *dev);
1502 extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
1503 struct drm_file *file_priv);
1504 extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1505 extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
1506 struct drm_file *file_priv);
1507 extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
1508 extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
1509 struct drm_file *file_priv);
1510 extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1511 extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
1512 struct drm_file *file_priv);
1513 extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1514 extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
1515 struct drm_file *file_priv);
1516 extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1517 extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
1518 struct drm_file *file_priv);
1519 extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1520 extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
1521 struct drm_file *file_priv);
1522
1523 /* Stub support (drm_stub.h) */
1524 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1525 struct drm_file *file_priv);
1526 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1527 struct drm_file *file_priv);
1528 struct drm_master *drm_master_create(struct drm_minor *minor);
1529 extern struct drm_master *drm_master_get(struct drm_master *master);
1530 extern void drm_master_put(struct drm_master **master);
1531
1532 extern void drm_put_dev(struct drm_device *dev);
1533 extern int drm_put_minor(struct drm_minor **minor);
1534 extern void drm_unplug_dev(struct drm_device *dev);
1535 extern unsigned int drm_debug;
1536
1537 extern unsigned int drm_vblank_offdelay;
1538 extern unsigned int drm_timestamp_precision;
1539 extern unsigned int drm_timestamp_monotonic;
1540
1541 extern struct class *drm_class;
1542 extern struct proc_dir_entry *drm_proc_root;
1543 extern struct dentry *drm_debugfs_root;
1544
1545 extern struct idr drm_minors_idr;
1546
1547 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1548
1549 /* Proc support (drm_proc.h) */
1550 extern int drm_proc_init(struct drm_minor *minor, struct proc_dir_entry *root);
1551 extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);
1552
1553 /* Debugfs support */
1554 #if defined(CONFIG_DEBUG_FS)
1555 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1556 struct dentry *root);
1557 extern int drm_debugfs_create_files(struct drm_info_list *files, int count,
1558 struct dentry *root, struct drm_minor *minor);
1559 extern int drm_debugfs_remove_files(struct drm_info_list *files, int count,
1560 struct drm_minor *minor);
1561 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1562 #endif
1563
1564 /* Info file support */
1565 extern int drm_name_info(struct seq_file *m, void *data);
1566 extern int drm_vm_info(struct seq_file *m, void *data);
1567 extern int drm_bufs_info(struct seq_file *m, void *data);
1568 extern int drm_vblank_info(struct seq_file *m, void *data);
1569 extern int drm_clients_info(struct seq_file *m, void* data);
1570 extern int drm_gem_name_info(struct seq_file *m, void *data);
1571
1572
1573 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1574 struct drm_gem_object *obj, int flags);
1575 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1576 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1577 int *prime_fd);
1578 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1579 struct dma_buf *dma_buf);
1580 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1581 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1582
1583 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1584 struct drm_file *file_priv);
1585 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1586 struct drm_file *file_priv);
1587
1588 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1589 dma_addr_t *addrs, int max_pages);
1590 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1591 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1592
1593
1594 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1595 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1596 int drm_prime_lookup_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
1597 void drm_prime_remove_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1598
1599 int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
1600 int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
1601 struct drm_gem_object **obj);
1602
1603 #if DRM_DEBUG_CODE
1604 extern int drm_vma_info(struct seq_file *m, void *data);
1605 #endif
1606
1607 /* Scatter Gather Support (drm_scatter.h) */
1608 extern void drm_sg_cleanup(struct drm_sg_mem * entry);
1609 extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1610 struct drm_file *file_priv);
1611 extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
1612 extern int drm_sg_free(struct drm_device *dev, void *data,
1613 struct drm_file *file_priv);
1614
1615 /* ATI PCIGART support (ati_pcigart.h) */
1616 extern int drm_ati_pcigart_init(struct drm_device *dev,
1617 struct drm_ati_pcigart_info * gart_info);
1618 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1619 struct drm_ati_pcigart_info * gart_info);
1620
1621 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1622 size_t align);
1623 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1624 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1625
1626 /* sysfs support (drm_sysfs.c) */
1627 struct drm_sysfs_class;
1628 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1629 extern void drm_sysfs_destroy(void);
1630 extern int drm_sysfs_device_add(struct drm_minor *minor);
1631 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1632 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1633 extern char *drm_get_connector_status_name(enum drm_connector_status status);
1634 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1635 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1636
1637 /* Graphics Execution Manager library functions (drm_gem.c) */
1638 int drm_gem_init(struct drm_device *dev);
1639 void drm_gem_destroy(struct drm_device *dev);
1640 void drm_gem_object_release(struct drm_gem_object *obj);
1641 void drm_gem_object_free(struct kref *kref);
1642 struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
1643 size_t size);
1644 int drm_gem_object_init(struct drm_device *dev,
1645 struct drm_gem_object *obj, size_t size);
1646 int drm_gem_private_object_init(struct drm_device *dev,
1647 struct drm_gem_object *obj, size_t size);
1648 void drm_gem_object_handle_free(struct drm_gem_object *obj);
1649 void drm_gem_vm_open(struct vm_area_struct *vma);
1650 void drm_gem_vm_close(struct vm_area_struct *vma);
1651 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1652
1653 #include <drm/drm_global.h>
1654
1655 static inline void
drm_gem_object_reference(struct drm_gem_object * obj)1656 drm_gem_object_reference(struct drm_gem_object *obj)
1657 {
1658 kref_get(&obj->refcount);
1659 }
1660
1661 static inline void
drm_gem_object_unreference(struct drm_gem_object * obj)1662 drm_gem_object_unreference(struct drm_gem_object *obj)
1663 {
1664 if (obj != NULL)
1665 kref_put(&obj->refcount, drm_gem_object_free);
1666 }
1667
1668 static inline void
drm_gem_object_unreference_unlocked(struct drm_gem_object * obj)1669 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1670 {
1671 if (obj != NULL) {
1672 struct drm_device *dev = obj->dev;
1673 mutex_lock(&dev->struct_mutex);
1674 kref_put(&obj->refcount, drm_gem_object_free);
1675 mutex_unlock(&dev->struct_mutex);
1676 }
1677 }
1678
1679 int drm_gem_handle_create(struct drm_file *file_priv,
1680 struct drm_gem_object *obj,
1681 u32 *handlep);
1682 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1683
1684 static inline void
drm_gem_object_handle_reference(struct drm_gem_object * obj)1685 drm_gem_object_handle_reference(struct drm_gem_object *obj)
1686 {
1687 drm_gem_object_reference(obj);
1688 atomic_inc(&obj->handle_count);
1689 }
1690
1691 static inline void
drm_gem_object_handle_unreference(struct drm_gem_object * obj)1692 drm_gem_object_handle_unreference(struct drm_gem_object *obj)
1693 {
1694 if (obj == NULL)
1695 return;
1696
1697 if (atomic_read(&obj->handle_count) == 0)
1698 return;
1699 /*
1700 * Must bump handle count first as this may be the last
1701 * ref, in which case the object would disappear before we
1702 * checked for a name
1703 */
1704 if (atomic_dec_and_test(&obj->handle_count))
1705 drm_gem_object_handle_free(obj);
1706 drm_gem_object_unreference(obj);
1707 }
1708
1709 static inline void
drm_gem_object_handle_unreference_unlocked(struct drm_gem_object * obj)1710 drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
1711 {
1712 if (obj == NULL)
1713 return;
1714
1715 if (atomic_read(&obj->handle_count) == 0)
1716 return;
1717
1718 /*
1719 * Must bump handle count first as this may be the last
1720 * ref, in which case the object would disappear before we
1721 * checked for a name
1722 */
1723
1724 if (atomic_dec_and_test(&obj->handle_count))
1725 drm_gem_object_handle_free(obj);
1726 drm_gem_object_unreference_unlocked(obj);
1727 }
1728
1729 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1730 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1731
1732 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1733 struct drm_file *filp,
1734 u32 handle);
1735 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1736 struct drm_file *file_priv);
1737 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1738 struct drm_file *file_priv);
1739 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1740 struct drm_file *file_priv);
1741 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1742 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1743
1744 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1745 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1746 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1747
drm_core_findmap(struct drm_device * dev,unsigned int token)1748 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1749 unsigned int token)
1750 {
1751 struct drm_map_list *_entry;
1752 list_for_each_entry(_entry, &dev->maplist, head)
1753 if (_entry->user_token == token)
1754 return _entry->map;
1755 return NULL;
1756 }
1757
drm_core_dropmap(struct drm_local_map * map)1758 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1759 {
1760 }
1761
1762 #include <drm/drm_mem_util.h>
1763
1764 extern int drm_fill_in_dev(struct drm_device *dev,
1765 const struct pci_device_id *ent,
1766 struct drm_driver *driver);
1767 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
1768 /*@}*/
1769
1770 /* PCI section */
drm_pci_device_is_agp(struct drm_device * dev)1771 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1772 {
1773 if (dev->driver->device_is_agp != NULL) {
1774 int err = (*dev->driver->device_is_agp) (dev);
1775
1776 if (err != 2) {
1777 return err;
1778 }
1779 }
1780
1781 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1782 }
1783
1784 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1785 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1786 extern int drm_get_pci_dev(struct pci_dev *pdev,
1787 const struct pci_device_id *ent,
1788 struct drm_driver *driver);
1789
1790 #define DRM_PCIE_SPEED_25 1
1791 #define DRM_PCIE_SPEED_50 2
1792 #define DRM_PCIE_SPEED_80 4
1793
1794 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1795
1796 /* platform section */
1797 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1798 extern void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device);
1799
1800 extern int drm_get_platform_dev(struct platform_device *pdev,
1801 struct drm_driver *driver);
1802
1803 /* returns true if currently okay to sleep */
drm_can_sleep(void)1804 static __inline__ bool drm_can_sleep(void)
1805 {
1806 if (in_atomic() || in_dbg_master() || irqs_disabled())
1807 return false;
1808 return true;
1809 }
1810
1811 #endif /* __KERNEL__ */
1812 #endif
1813