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TOMOYO Linux Cross Reference
Linux/include/drm/drmP.h

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  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/init.h>
 49 #include <linux/file.h>
 50 #include <linux/platform_device.h>
 51 #include <linux/pci.h>
 52 #include <linux/jiffies.h>
 53 #include <linux/dma-mapping.h>
 54 #include <linux/mm.h>
 55 #include <linux/cdev.h>
 56 #include <linux/mutex.h>
 57 #include <linux/io.h>
 58 #include <linux/slab.h>
 59 #include <linux/ratelimit.h>
 60 #if defined(__alpha__) || defined(__powerpc__)
 61 #include <asm/pgtable.h>        /* For pte_wrprotect */
 62 #endif
 63 #include <asm/mman.h>
 64 #include <asm/uaccess.h>
 65 #include <linux/types.h>
 66 #include <linux/agp_backend.h>
 67 #include <linux/workqueue.h>
 68 #include <linux/poll.h>
 69 #include <asm/pgalloc.h>
 70 #include <drm/drm.h>
 71 #include <drm/drm_sarea.h>
 72 #include <drm/drm_vma_manager.h>
 73 
 74 #include <linux/idr.h>
 75 
 76 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
 77 
 78 struct module;
 79 
 80 struct drm_file;
 81 struct drm_device;
 82 
 83 struct device_node;
 84 struct videomode;
 85 
 86 #include <drm/drm_os_linux.h>
 87 #include <drm/drm_hashtab.h>
 88 #include <drm/drm_mm.h>
 89 
 90 #define DRM_UT_CORE             0x01
 91 #define DRM_UT_DRIVER           0x02
 92 #define DRM_UT_KMS              0x04
 93 #define DRM_UT_PRIME            0x08
 94 /*
 95  * Three debug levels are defined.
 96  * drm_core, drm_driver, drm_kms
 97  * drm_core level can be used in the generic drm code. For example:
 98  *      drm_ioctl, drm_mm, drm_memory
 99  * The macro definition of DRM_DEBUG is used.
100  *      DRM_DEBUG(fmt, args...)
101  *      The debug info by using the DRM_DEBUG can be obtained by adding
102  *      the boot option of "drm.debug=1".
103  *
104  * drm_driver level can be used in the specific drm driver. It is used
105  * to add the debug info related with the drm driver. For example:
106  * i915_drv, i915_dma, i915_gem, radeon_drv,
107  *      The macro definition of DRM_DEBUG_DRIVER can be used.
108  *      DRM_DEBUG_DRIVER(fmt, args...)
109  *      The debug info by using the DRM_DEBUG_DRIVER can be obtained by
110  *      adding the boot option of "drm.debug=0x02"
111  *
112  * drm_kms level can be used in the KMS code related with specific drm driver.
113  * It is used to add the debug info related with KMS mode. For example:
114  * the connector/crtc ,
115  *      The macro definition of DRM_DEBUG_KMS can be used.
116  *      DRM_DEBUG_KMS(fmt, args...)
117  *      The debug info by using the DRM_DEBUG_KMS can be obtained by
118  *      adding the boot option of "drm.debug=0x04"
119  *
120  * If we add the boot option of "drm.debug=0x06", we can get the debug info by
121  * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
122  * If we add the boot option of "drm.debug=0x05", we can get the debug info by
123  * using the DRM_DEBUG_KMS and DRM_DEBUG.
124  */
125 
126 extern __printf(4, 5)
127 void drm_ut_debug_printk(unsigned int request_level,
128                          const char *prefix,
129                          const char *function_name,
130                          const char *format, ...);
131 extern __printf(2, 3)
132 int drm_err(const char *func, const char *format, ...);
133 
134 /***********************************************************************/
135 /** \name DRM template customization defaults */
136 /*@{*/
137 
138 /* driver capabilities and requirements mask */
139 #define DRIVER_USE_AGP     0x1
140 #define DRIVER_PCI_DMA     0x8
141 #define DRIVER_SG          0x10
142 #define DRIVER_HAVE_DMA    0x20
143 #define DRIVER_HAVE_IRQ    0x40
144 #define DRIVER_IRQ_SHARED  0x80
145 #define DRIVER_GEM         0x1000
146 #define DRIVER_MODESET     0x2000
147 #define DRIVER_PRIME       0x4000
148 #define DRIVER_RENDER      0x8000
149 
150 #define DRIVER_BUS_PCI 0x1
151 #define DRIVER_BUS_PLATFORM 0x2
152 #define DRIVER_BUS_USB 0x3
153 #define DRIVER_BUS_HOST1X 0x4
154 
155 /***********************************************************************/
156 /** \name Begin the DRM... */
157 /*@{*/
158 
159 #define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
160                                      also include looping detection. */
161 
162 #define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
163 #define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
164 #define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
165 
166 #define DRM_MAP_HASH_OFFSET 0x10000000
167 
168 /*@}*/
169 
170 /***********************************************************************/
171 /** \name Macros to make printk easier */
172 /*@{*/
173 
174 /**
175  * Error output.
176  *
177  * \param fmt printf() like format string.
178  * \param arg arguments
179  */
180 #define DRM_ERROR(fmt, ...)                             \
181         drm_err(__func__, fmt, ##__VA_ARGS__)
182 
183 /**
184  * Rate limited error output.  Like DRM_ERROR() but won't flood the log.
185  *
186  * \param fmt printf() like format string.
187  * \param arg arguments
188  */
189 #define DRM_ERROR_RATELIMITED(fmt, ...)                         \
190 ({                                                                      \
191         static DEFINE_RATELIMIT_STATE(_rs,                              \
192                                       DEFAULT_RATELIMIT_INTERVAL,       \
193                                       DEFAULT_RATELIMIT_BURST);         \
194                                                                         \
195         if (__ratelimit(&_rs))                                          \
196                 drm_err(__func__, fmt, ##__VA_ARGS__);                  \
197 })
198 
199 #define DRM_INFO(fmt, ...)                              \
200         printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
201 
202 #define DRM_INFO_ONCE(fmt, ...)                         \
203         printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
204 
205 /**
206  * Debug output.
207  *
208  * \param fmt printf() like format string.
209  * \param arg arguments
210  */
211 #if DRM_DEBUG_CODE
212 #define DRM_DEBUG(fmt, args...)                                         \
213         do {                                                            \
214                 drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME,              \
215                                         __func__, fmt, ##args);         \
216         } while (0)
217 
218 #define DRM_DEBUG_DRIVER(fmt, args...)                                  \
219         do {                                                            \
220                 drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME,            \
221                                         __func__, fmt, ##args);         \
222         } while (0)
223 #define DRM_DEBUG_KMS(fmt, args...)                             \
224         do {                                                            \
225                 drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME,               \
226                                          __func__, fmt, ##args);        \
227         } while (0)
228 #define DRM_DEBUG_PRIME(fmt, args...)                                   \
229         do {                                                            \
230                 drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME,             \
231                                         __func__, fmt, ##args);         \
232         } while (0)
233 #define DRM_LOG(fmt, args...)                                           \
234         do {                                                            \
235                 drm_ut_debug_printk(DRM_UT_CORE, NULL,                  \
236                                         NULL, fmt, ##args);             \
237         } while (0)
238 #define DRM_LOG_KMS(fmt, args...)                                       \
239         do {                                                            \
240                 drm_ut_debug_printk(DRM_UT_KMS, NULL,                   \
241                                         NULL, fmt, ##args);             \
242         } while (0)
243 #define DRM_LOG_MODE(fmt, args...)                                      \
244         do {                                                            \
245                 drm_ut_debug_printk(DRM_UT_MODE, NULL,                  \
246                                         NULL, fmt, ##args);             \
247         } while (0)
248 #define DRM_LOG_DRIVER(fmt, args...)                                    \
249         do {                                                            \
250                 drm_ut_debug_printk(DRM_UT_DRIVER, NULL,                \
251                                         NULL, fmt, ##args);             \
252         } while (0)
253 #else
254 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
255 #define DRM_DEBUG_KMS(fmt, args...)     do { } while (0)
256 #define DRM_DEBUG_PRIME(fmt, args...)   do { } while (0)
257 #define DRM_DEBUG(fmt, arg...)           do { } while (0)
258 #define DRM_LOG(fmt, arg...)            do { } while (0)
259 #define DRM_LOG_KMS(fmt, args...) do { } while (0)
260 #define DRM_LOG_MODE(fmt, arg...) do { } while (0)
261 #define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
262 
263 #endif
264 
265 /*@}*/
266 
267 /***********************************************************************/
268 /** \name Internal types and structures */
269 /*@{*/
270 
271 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
272 
273 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
274 
275 /**
276  * Test that the hardware lock is held by the caller, returning otherwise.
277  *
278  * \param dev DRM device.
279  * \param filp file pointer of the caller.
280  */
281 #define LOCK_TEST_WITH_RETURN( dev, _file_priv )                                \
282 do {                                                                            \
283         if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||       \
284             _file_priv->master->lock.file_priv != _file_priv)   {               \
285                 DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
286                            __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
287                            _file_priv->master->lock.file_priv, _file_priv);     \
288                 return -EINVAL;                                                 \
289         }                                                                       \
290 } while (0)
291 
292 /**
293  * Ioctl function type.
294  *
295  * \param inode device inode.
296  * \param file_priv DRM file private pointer.
297  * \param cmd command.
298  * \param arg argument.
299  */
300 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
301                         struct drm_file *file_priv);
302 
303 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
304                                unsigned long arg);
305 
306 #define DRM_IOCTL_NR(n)                _IOC_NR(n)
307 #define DRM_MAJOR       226
308 
309 #define DRM_AUTH        0x1
310 #define DRM_MASTER      0x2
311 #define DRM_ROOT_ONLY   0x4
312 #define DRM_CONTROL_ALLOW 0x8
313 #define DRM_UNLOCKED    0x10
314 #define DRM_RENDER_ALLOW 0x20
315 
316 struct drm_ioctl_desc {
317         unsigned int cmd;
318         int flags;
319         drm_ioctl_t *func;
320         unsigned int cmd_drv;
321         const char *name;
322 };
323 
324 /**
325  * Creates a driver or general drm_ioctl_desc array entry for the given
326  * ioctl, for use by drm_ioctl().
327  */
328 
329 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)                 \
330         [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
331 
332 struct drm_magic_entry {
333         struct list_head head;
334         struct drm_hash_item hash_item;
335         struct drm_file *priv;
336 };
337 
338 struct drm_vma_entry {
339         struct list_head head;
340         struct vm_area_struct *vma;
341         pid_t pid;
342 };
343 
344 /**
345  * DMA buffer.
346  */
347 struct drm_buf {
348         int idx;                       /**< Index into master buflist */
349         int total;                     /**< Buffer size */
350         int order;                     /**< log-base-2(total) */
351         int used;                      /**< Amount of buffer in use (for DMA) */
352         unsigned long offset;          /**< Byte offset (used internally) */
353         void *address;                 /**< Address of buffer */
354         unsigned long bus_address;     /**< Bus address of buffer */
355         struct drm_buf *next;          /**< Kernel-only: used for free list */
356         __volatile__ int waiting;      /**< On kernel DMA queue */
357         __volatile__ int pending;      /**< On hardware DMA queue */
358         struct drm_file *file_priv;    /**< Private of holding file descr */
359         int context;                   /**< Kernel queue for this buffer */
360         int while_locked;              /**< Dispatch this buffer while locked */
361         enum {
362                 DRM_LIST_NONE = 0,
363                 DRM_LIST_FREE = 1,
364                 DRM_LIST_WAIT = 2,
365                 DRM_LIST_PEND = 3,
366                 DRM_LIST_PRIO = 4,
367                 DRM_LIST_RECLAIM = 5
368         } list;                        /**< Which list we're on */
369 
370         int dev_priv_size;               /**< Size of buffer private storage */
371         void *dev_private;               /**< Per-buffer private storage */
372 };
373 
374 /** bufs is one longer than it has to be */
375 struct drm_waitlist {
376         int count;                      /**< Number of possible buffers */
377         struct drm_buf **bufs;          /**< List of pointers to buffers */
378         struct drm_buf **rp;                    /**< Read pointer */
379         struct drm_buf **wp;                    /**< Write pointer */
380         struct drm_buf **end;           /**< End pointer */
381         spinlock_t read_lock;
382         spinlock_t write_lock;
383 };
384 
385 struct drm_freelist {
386         int initialized;               /**< Freelist in use */
387         atomic_t count;                /**< Number of free buffers */
388         struct drm_buf *next;          /**< End pointer */
389 
390         wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
391         int low_mark;                  /**< Low water mark */
392         int high_mark;                 /**< High water mark */
393         atomic_t wfh;                  /**< If waiting for high mark */
394         spinlock_t lock;
395 };
396 
397 typedef struct drm_dma_handle {
398         dma_addr_t busaddr;
399         void *vaddr;
400         size_t size;
401 } drm_dma_handle_t;
402 
403 /**
404  * Buffer entry.  There is one of this for each buffer size order.
405  */
406 struct drm_buf_entry {
407         int buf_size;                   /**< size */
408         int buf_count;                  /**< number of buffers */
409         struct drm_buf *buflist;                /**< buffer list */
410         int seg_count;
411         int page_order;
412         struct drm_dma_handle **seglist;
413 
414         struct drm_freelist freelist;
415 };
416 
417 /* Event queued up for userspace to read */
418 struct drm_pending_event {
419         struct drm_event *event;
420         struct list_head link;
421         struct drm_file *file_priv;
422         pid_t pid; /* pid of requester, no guarantee it's valid by the time
423                       we deliver the event, for tracing only */
424         void (*destroy)(struct drm_pending_event *event);
425 };
426 
427 /* initial implementaton using a linked list - todo hashtab */
428 struct drm_prime_file_private {
429         struct list_head head;
430         struct mutex lock;
431 };
432 
433 /** File private data */
434 struct drm_file {
435         unsigned always_authenticated :1;
436         unsigned authenticated :1;
437         unsigned is_master :1; /* this file private is a master for a minor */
438         /* true when the client has asked us to expose stereo 3D mode flags */
439         unsigned stereo_allowed :1;
440 
441         struct pid *pid;
442         kuid_t uid;
443         drm_magic_t magic;
444         struct list_head lhead;
445         struct drm_minor *minor;
446         unsigned long lock_count;
447 
448         /** Mapping of mm object handles to object pointers. */
449         struct idr object_idr;
450         /** Lock for synchronization of access to object_idr. */
451         spinlock_t table_lock;
452 
453         struct file *filp;
454         void *driver_priv;
455 
456         struct drm_master *master; /* master this node is currently associated with
457                                       N.B. not always minor->master */
458         /**
459          * fbs - List of framebuffers associated with this file.
460          *
461          * Protected by fbs_lock. Note that the fbs list holds a reference on
462          * the fb object to prevent it from untimely disappearing.
463          */
464         struct list_head fbs;
465         struct mutex fbs_lock;
466 
467         wait_queue_head_t event_wait;
468         struct list_head event_list;
469         int event_space;
470 
471         struct drm_prime_file_private prime;
472 };
473 
474 /** Wait queue */
475 struct drm_queue {
476         atomic_t use_count;             /**< Outstanding uses (+1) */
477         atomic_t finalization;          /**< Finalization in progress */
478         atomic_t block_count;           /**< Count of processes waiting */
479         atomic_t block_read;            /**< Queue blocked for reads */
480         wait_queue_head_t read_queue;   /**< Processes waiting on block_read */
481         atomic_t block_write;           /**< Queue blocked for writes */
482         wait_queue_head_t write_queue;  /**< Processes waiting on block_write */
483         atomic_t total_queued;          /**< Total queued statistic */
484         atomic_t total_flushed;         /**< Total flushes statistic */
485         atomic_t total_locks;           /**< Total locks statistics */
486         enum drm_ctx_flags flags;       /**< Context preserving and 2D-only */
487         struct drm_waitlist waitlist;   /**< Pending buffers */
488         wait_queue_head_t flush_queue;  /**< Processes waiting until flush */
489 };
490 
491 /**
492  * Lock data.
493  */
494 struct drm_lock_data {
495         struct drm_hw_lock *hw_lock;    /**< Hardware lock */
496         /** Private of lock holder's file (NULL=kernel) */
497         struct drm_file *file_priv;
498         wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
499         unsigned long lock_time;        /**< Time of last lock in jiffies */
500         spinlock_t spinlock;
501         uint32_t kernel_waiters;
502         uint32_t user_waiters;
503         int idle_has_lock;
504 };
505 
506 /**
507  * DMA data.
508  */
509 struct drm_device_dma {
510 
511         struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   /**< buffers, grouped by their size order */
512         int buf_count;                  /**< total number of buffers */
513         struct drm_buf **buflist;               /**< Vector of pointers into drm_device_dma::bufs */
514         int seg_count;
515         int page_count;                 /**< number of pages */
516         unsigned long *pagelist;        /**< page list */
517         unsigned long byte_count;
518         enum {
519                 _DRM_DMA_USE_AGP = 0x01,
520                 _DRM_DMA_USE_SG = 0x02,
521                 _DRM_DMA_USE_FB = 0x04,
522                 _DRM_DMA_USE_PCI_RO = 0x08
523         } flags;
524 
525 };
526 
527 /**
528  * AGP memory entry.  Stored as a doubly linked list.
529  */
530 struct drm_agp_mem {
531         unsigned long handle;           /**< handle */
532         struct agp_memory *memory;
533         unsigned long bound;            /**< address */
534         int pages;
535         struct list_head head;
536 };
537 
538 /**
539  * AGP data.
540  *
541  * \sa drm_agp_init() and drm_device::agp.
542  */
543 struct drm_agp_head {
544         struct agp_kern_info agp_info;          /**< AGP device information */
545         struct list_head memory;
546         unsigned long mode;             /**< AGP mode */
547         struct agp_bridge_data *bridge;
548         int enabled;                    /**< whether the AGP bus as been enabled */
549         int acquired;                   /**< whether the AGP device has been acquired */
550         unsigned long base;
551         int agp_mtrr;
552         int cant_use_aperture;
553         unsigned long page_mask;
554 };
555 
556 /**
557  * Scatter-gather memory.
558  */
559 struct drm_sg_mem {
560         unsigned long handle;
561         void *virtual;
562         int pages;
563         struct page **pagelist;
564         dma_addr_t *busaddr;
565 };
566 
567 struct drm_sigdata {
568         int context;
569         struct drm_hw_lock *lock;
570 };
571 
572 
573 /**
574  * Kernel side of a mapping
575  */
576 struct drm_local_map {
577         resource_size_t offset;  /**< Requested physical address (0 for SAREA)*/
578         unsigned long size;      /**< Requested physical size (bytes) */
579         enum drm_map_type type;  /**< Type of memory to map */
580         enum drm_map_flags flags;        /**< Flags */
581         void *handle;            /**< User-space: "Handle" to pass to mmap() */
582                                  /**< Kernel-space: kernel-virtual address */
583         int mtrr;                /**< MTRR slot used */
584 };
585 
586 typedef struct drm_local_map drm_local_map_t;
587 
588 /**
589  * Mappings list
590  */
591 struct drm_map_list {
592         struct list_head head;          /**< list head */
593         struct drm_hash_item hash;
594         struct drm_local_map *map;      /**< mapping */
595         uint64_t user_token;
596         struct drm_master *master;
597 };
598 
599 /**
600  * Context handle list
601  */
602 struct drm_ctx_list {
603         struct list_head head;          /**< list head */
604         drm_context_t handle;           /**< context handle */
605         struct drm_file *tag;           /**< associated fd private data */
606 };
607 
608 /* location of GART table */
609 #define DRM_ATI_GART_MAIN 1
610 #define DRM_ATI_GART_FB   2
611 
612 #define DRM_ATI_GART_PCI 1
613 #define DRM_ATI_GART_PCIE 2
614 #define DRM_ATI_GART_IGP 3
615 
616 struct drm_ati_pcigart_info {
617         int gart_table_location;
618         int gart_reg_if;
619         void *addr;
620         dma_addr_t bus_addr;
621         dma_addr_t table_mask;
622         struct drm_dma_handle *table_handle;
623         struct drm_local_map mapping;
624         int table_size;
625 };
626 
627 /**
628  * This structure defines the drm_mm memory object, which will be used by the
629  * DRM for its buffer objects.
630  */
631 struct drm_gem_object {
632         /** Reference count of this object */
633         struct kref refcount;
634 
635         /**
636          * handle_count - gem file_priv handle count of this object
637          *
638          * Each handle also holds a reference. Note that when the handle_count
639          * drops to 0 any global names (e.g. the id in the flink namespace) will
640          * be cleared.
641          *
642          * Protected by dev->object_name_lock.
643          * */
644         unsigned handle_count;
645 
646         /** Related drm device */
647         struct drm_device *dev;
648 
649         /** File representing the shmem storage */
650         struct file *filp;
651 
652         /* Mapping info for this object */
653         struct drm_vma_offset_node vma_node;
654 
655         /**
656          * Size of the object, in bytes.  Immutable over the object's
657          * lifetime.
658          */
659         size_t size;
660 
661         /**
662          * Global name for this object, starts at 1. 0 means unnamed.
663          * Access is covered by the object_name_lock in the related drm_device
664          */
665         int name;
666 
667         /**
668          * Memory domains. These monitor which caches contain read/write data
669          * related to the object. When transitioning from one set of domains
670          * to another, the driver is called to ensure that caches are suitably
671          * flushed and invalidated
672          */
673         uint32_t read_domains;
674         uint32_t write_domain;
675 
676         /**
677          * While validating an exec operation, the
678          * new read/write domain values are computed here.
679          * They will be transferred to the above values
680          * at the point that any cache flushing occurs
681          */
682         uint32_t pending_read_domains;
683         uint32_t pending_write_domain;
684 
685         /**
686          * dma_buf - dma buf associated with this GEM object
687          *
688          * Pointer to the dma-buf associated with this gem object (either
689          * through importing or exporting). We break the resulting reference
690          * loop when the last gem handle for this object is released.
691          *
692          * Protected by obj->object_name_lock
693          */
694         struct dma_buf *dma_buf;
695 
696         /**
697          * import_attach - dma buf attachment backing this object
698          *
699          * Any foreign dma_buf imported as a gem object has this set to the
700          * attachment point for the device. This is invariant over the lifetime
701          * of a gem object.
702          *
703          * The driver's ->gem_free_object callback is responsible for cleaning
704          * up the dma_buf attachment and references acquired at import time.
705          *
706          * Note that the drm gem/prime core does not depend upon drivers setting
707          * this field any more. So for drivers where this doesn't make sense
708          * (e.g. virtual devices or a displaylink behind an usb bus) they can
709          * simply leave it as NULL.
710          */
711         struct dma_buf_attachment *import_attach;
712 };
713 
714 #include <drm/drm_crtc.h>
715 
716 /* per-master structure */
717 struct drm_master {
718 
719         struct kref refcount; /* refcount for this master */
720 
721         struct list_head head; /**< each minor contains a list of masters */
722         struct drm_minor *minor; /**< link back to minor we are a master for */
723 
724         char *unique;                   /**< Unique identifier: e.g., busid */
725         int unique_len;                 /**< Length of unique field */
726         int unique_size;                /**< amount allocated */
727 
728         int blocked;                    /**< Blocked due to VC switch? */
729 
730         /** \name Authentication */
731         /*@{ */
732         struct drm_open_hash magiclist;
733         struct list_head magicfree;
734         /*@} */
735 
736         struct drm_lock_data lock;      /**< Information on hardware lock */
737 
738         void *driver_priv; /**< Private structure for driver to use */
739 };
740 
741 /* Size of ringbuffer for vblank timestamps. Just double-buffer
742  * in initial implementation.
743  */
744 #define DRM_VBLANKTIME_RBSIZE 2
745 
746 /* Flags and return codes for get_vblank_timestamp() driver function. */
747 #define DRM_CALLED_FROM_VBLIRQ 1
748 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
749 #define DRM_VBLANKTIME_INVBL             (1 << 1)
750 
751 /* get_scanout_position() return flags */
752 #define DRM_SCANOUTPOS_VALID        (1 << 0)
753 #define DRM_SCANOUTPOS_INVBL        (1 << 1)
754 #define DRM_SCANOUTPOS_ACCURATE     (1 << 2)
755 
756 struct drm_bus {
757         int bus_type;
758         int (*get_irq)(struct drm_device *dev);
759         const char *(*get_name)(struct drm_device *dev);
760         int (*set_busid)(struct drm_device *dev, struct drm_master *master);
761         int (*set_unique)(struct drm_device *dev, struct drm_master *master,
762                           struct drm_unique *unique);
763         int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
764 };
765 
766 /**
767  * DRM driver structure. This structure represent the common code for
768  * a family of cards. There will one drm_device for each card present
769  * in this family
770  */
771 struct drm_driver {
772         int (*load) (struct drm_device *, unsigned long flags);
773         int (*firstopen) (struct drm_device *);
774         int (*open) (struct drm_device *, struct drm_file *);
775         void (*preclose) (struct drm_device *, struct drm_file *file_priv);
776         void (*postclose) (struct drm_device *, struct drm_file *);
777         void (*lastclose) (struct drm_device *);
778         int (*unload) (struct drm_device *);
779         int (*suspend) (struct drm_device *, pm_message_t state);
780         int (*resume) (struct drm_device *);
781         int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
782         int (*dma_quiescent) (struct drm_device *);
783         int (*context_dtor) (struct drm_device *dev, int context);
784 
785         /**
786          * get_vblank_counter - get raw hardware vblank counter
787          * @dev: DRM device
788          * @crtc: counter to fetch
789          *
790          * Driver callback for fetching a raw hardware vblank counter for @crtc.
791          * If a device doesn't have a hardware counter, the driver can simply
792          * return the value of drm_vblank_count. The DRM core will account for
793          * missed vblank events while interrupts where disabled based on system
794          * timestamps.
795          *
796          * Wraparound handling and loss of events due to modesetting is dealt
797          * with in the DRM core code.
798          *
799          * RETURNS
800          * Raw vblank counter value.
801          */
802         u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
803 
804         /**
805          * enable_vblank - enable vblank interrupt events
806          * @dev: DRM device
807          * @crtc: which irq to enable
808          *
809          * Enable vblank interrupts for @crtc.  If the device doesn't have
810          * a hardware vblank counter, this routine should be a no-op, since
811          * interrupts will have to stay on to keep the count accurate.
812          *
813          * RETURNS
814          * Zero on success, appropriate errno if the given @crtc's vblank
815          * interrupt cannot be enabled.
816          */
817         int (*enable_vblank) (struct drm_device *dev, int crtc);
818 
819         /**
820          * disable_vblank - disable vblank interrupt events
821          * @dev: DRM device
822          * @crtc: which irq to enable
823          *
824          * Disable vblank interrupts for @crtc.  If the device doesn't have
825          * a hardware vblank counter, this routine should be a no-op, since
826          * interrupts will have to stay on to keep the count accurate.
827          */
828         void (*disable_vblank) (struct drm_device *dev, int crtc);
829 
830         /**
831          * Called by \c drm_device_is_agp.  Typically used to determine if a
832          * card is really attached to AGP or not.
833          *
834          * \param dev  DRM device handle
835          *
836          * \returns
837          * One of three values is returned depending on whether or not the
838          * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
839          * (return of 1), or may or may not be AGP (return of 2).
840          */
841         int (*device_is_agp) (struct drm_device *dev);
842 
843         /**
844          * Called by vblank timestamping code.
845          *
846          * Return the current display scanout position from a crtc, and an
847          * optional accurate ktime_get timestamp of when position was measured.
848          *
849          * \param dev  DRM device.
850          * \param crtc Id of the crtc to query.
851          * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
852          * \param *vpos Target location for current vertical scanout position.
853          * \param *hpos Target location for current horizontal scanout position.
854          * \param *stime Target location for timestamp taken immediately before
855          *               scanout position query. Can be NULL to skip timestamp.
856          * \param *etime Target location for timestamp taken immediately after
857          *               scanout position query. Can be NULL to skip timestamp.
858          *
859          * Returns vpos as a positive number while in active scanout area.
860          * Returns vpos as a negative number inside vblank, counting the number
861          * of scanlines to go until end of vblank, e.g., -1 means "one scanline
862          * until start of active scanout / end of vblank."
863          *
864          * \return Flags, or'ed together as follows:
865          *
866          * DRM_SCANOUTPOS_VALID = Query successful.
867          * DRM_SCANOUTPOS_INVBL = Inside vblank.
868          * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
869          * this flag means that returned position may be offset by a constant
870          * but unknown small number of scanlines wrt. real scanout position.
871          *
872          */
873         int (*get_scanout_position) (struct drm_device *dev, int crtc,
874                                      unsigned int flags,
875                                      int *vpos, int *hpos, ktime_t *stime,
876                                      ktime_t *etime);
877 
878         /**
879          * Called by \c drm_get_last_vbltimestamp. Should return a precise
880          * timestamp when the most recent VBLANK interval ended or will end.
881          *
882          * Specifically, the timestamp in @vblank_time should correspond as
883          * closely as possible to the time when the first video scanline of
884          * the video frame after the end of VBLANK will start scanning out,
885          * the time immediately after end of the VBLANK interval. If the
886          * @crtc is currently inside VBLANK, this will be a time in the future.
887          * If the @crtc is currently scanning out a frame, this will be the
888          * past start time of the current scanout. This is meant to adhere
889          * to the OpenML OML_sync_control extension specification.
890          *
891          * \param dev dev DRM device handle.
892          * \param crtc crtc for which timestamp should be returned.
893          * \param *max_error Maximum allowable timestamp error in nanoseconds.
894          *                   Implementation should strive to provide timestamp
895          *                   with an error of at most *max_error nanoseconds.
896          *                   Returns true upper bound on error for timestamp.
897          * \param *vblank_time Target location for returned vblank timestamp.
898          * \param flags 0 = Defaults, no special treatment needed.
899          * \param       DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
900          *              irq handler. Some drivers need to apply some workarounds
901          *              for gpu-specific vblank irq quirks if flag is set.
902          *
903          * \returns
904          * Zero if timestamping isn't supported in current display mode or a
905          * negative number on failure. A positive status code on success,
906          * which describes how the vblank_time timestamp was computed.
907          */
908         int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
909                                      int *max_error,
910                                      struct timeval *vblank_time,
911                                      unsigned flags);
912 
913         /* these have to be filled in */
914 
915         irqreturn_t(*irq_handler) (int irq, void *arg);
916         void (*irq_preinstall) (struct drm_device *dev);
917         int (*irq_postinstall) (struct drm_device *dev);
918         void (*irq_uninstall) (struct drm_device *dev);
919 
920         /* Master routines */
921         int (*master_create)(struct drm_device *dev, struct drm_master *master);
922         void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
923         /**
924          * master_set is called whenever the minor master is set.
925          * master_drop is called whenever the minor master is dropped.
926          */
927 
928         int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
929                           bool from_open);
930         void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
931                             bool from_release);
932 
933         int (*debugfs_init)(struct drm_minor *minor);
934         void (*debugfs_cleanup)(struct drm_minor *minor);
935 
936         /**
937          * Driver-specific constructor for drm_gem_objects, to set up
938          * obj->driver_private.
939          *
940          * Returns 0 on success.
941          */
942         void (*gem_free_object) (struct drm_gem_object *obj);
943         int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
944         void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
945 
946         /* prime: */
947         /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
948         int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
949                                 uint32_t handle, uint32_t flags, int *prime_fd);
950         /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
951         int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
952                                 int prime_fd, uint32_t *handle);
953         /* export GEM -> dmabuf */
954         struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
955                                 struct drm_gem_object *obj, int flags);
956         /* import dmabuf -> GEM */
957         struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
958                                 struct dma_buf *dma_buf);
959         /* low-level interface used by drm_gem_prime_{import,export} */
960         int (*gem_prime_pin)(struct drm_gem_object *obj);
961         void (*gem_prime_unpin)(struct drm_gem_object *obj);
962         struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
963         struct drm_gem_object *(*gem_prime_import_sg_table)(
964                                 struct drm_device *dev, size_t size,
965                                 struct sg_table *sgt);
966         void *(*gem_prime_vmap)(struct drm_gem_object *obj);
967         void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
968         int (*gem_prime_mmap)(struct drm_gem_object *obj,
969                                 struct vm_area_struct *vma);
970 
971         /* vga arb irq handler */
972         void (*vgaarb_irq)(struct drm_device *dev, bool state);
973 
974         /* dumb alloc support */
975         int (*dumb_create)(struct drm_file *file_priv,
976                            struct drm_device *dev,
977                            struct drm_mode_create_dumb *args);
978         int (*dumb_map_offset)(struct drm_file *file_priv,
979                                struct drm_device *dev, uint32_t handle,
980                                uint64_t *offset);
981         int (*dumb_destroy)(struct drm_file *file_priv,
982                             struct drm_device *dev,
983                             uint32_t handle);
984 
985         /* Driver private ops for this object */
986         const struct vm_operations_struct *gem_vm_ops;
987 
988         int major;
989         int minor;
990         int patchlevel;
991         char *name;
992         char *desc;
993         char *date;
994 
995         u32 driver_features;
996         int dev_priv_size;
997         const struct drm_ioctl_desc *ioctls;
998         int num_ioctls;
999         const struct file_operations *fops;
1000         union {
1001                 struct pci_driver *pci;
1002                 struct platform_device *platform_device;
1003                 struct usb_driver *usb;
1004         } kdriver;
1005         struct drm_bus *bus;
1006 
1007         /* List of devices hanging off this driver with stealth attach. */
1008         struct list_head legacy_dev_list;
1009 };
1010 
1011 #define DRM_MINOR_UNASSIGNED 0
1012 #define DRM_MINOR_LEGACY 1
1013 #define DRM_MINOR_CONTROL 2
1014 #define DRM_MINOR_RENDER 3
1015 
1016 /**
1017  * Info file list entry. This structure represents a debugfs or proc file to
1018  * be created by the drm core
1019  */
1020 struct drm_info_list {
1021         const char *name; /** file name */
1022         int (*show)(struct seq_file*, void*); /** show callback */
1023         u32 driver_features; /**< Required driver features for this entry */
1024         void *data;
1025 };
1026 
1027 /**
1028  * debugfs node structure. This structure represents a debugfs file.
1029  */
1030 struct drm_info_node {
1031         struct list_head list;
1032         struct drm_minor *minor;
1033         const struct drm_info_list *info_ent;
1034         struct dentry *dent;
1035 };
1036 
1037 /**
1038  * DRM minor structure. This structure represents a drm minor number.
1039  */
1040 struct drm_minor {
1041         int index;                      /**< Minor device number */
1042         int type;                       /**< Control or render */
1043         dev_t device;                   /**< Device number for mknod */
1044         struct device *kdev;            /**< Linux device */
1045         struct drm_device *dev;
1046 
1047         struct dentry *debugfs_root;
1048 
1049         struct list_head debugfs_list;
1050         struct mutex debugfs_lock; /* Protects debugfs_list. */
1051 
1052         struct drm_master *master; /* currently active master for this node */
1053         struct list_head master_list;
1054         struct drm_mode_group mode_group;
1055 };
1056 
1057 /* mode specified on the command line */
1058 struct drm_cmdline_mode {
1059         bool specified;
1060         bool refresh_specified;
1061         bool bpp_specified;
1062         int xres, yres;
1063         int bpp;
1064         int refresh;
1065         bool rb;
1066         bool interlace;
1067         bool cvt;
1068         bool margins;
1069         enum drm_connector_force force;
1070 };
1071 
1072 
1073 struct drm_pending_vblank_event {
1074         struct drm_pending_event base;
1075         int pipe;
1076         struct drm_event_vblank event;
1077 };
1078 
1079 struct drm_vblank_crtc {
1080         wait_queue_head_t queue;        /**< VBLANK wait queue */
1081         struct timeval time[DRM_VBLANKTIME_RBSIZE];     /**< timestamp of current count */
1082         atomic_t count;                 /**< number of VBLANK interrupts */
1083         atomic_t refcount;              /* number of users of vblank interruptsper crtc */
1084         u32 last;                       /* protected by dev->vbl_lock, used */
1085                                         /* for wraparound handling */
1086         u32 last_wait;                  /* Last vblank seqno waited per CRTC */
1087         unsigned int inmodeset;         /* Display driver is setting mode */
1088         bool enabled;                   /* so we don't call enable more than
1089                                            once per disable */
1090 };
1091 
1092 /**
1093  * DRM device structure. This structure represent a complete card that
1094  * may contain multiple heads.
1095  */
1096 struct drm_device {
1097         struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
1098         char *devname;                  /**< For /proc/interrupts */
1099         int if_version;                 /**< Highest interface version set */
1100 
1101         /** \name Locks */
1102         /*@{ */
1103         spinlock_t count_lock;          /**< For inuse, drm_device::open_count, drm_device::buf_use */
1104         struct mutex struct_mutex;      /**< For others */
1105         /*@} */
1106 
1107         /** \name Usage Counters */
1108         /*@{ */
1109         int open_count;                 /**< Outstanding files open */
1110         int buf_use;                    /**< Buffers in use -- cannot alloc */
1111         atomic_t buf_alloc;             /**< Buffer allocation in progress */
1112         /*@} */
1113 
1114         struct list_head filelist;
1115 
1116         /** \name Memory management */
1117         /*@{ */
1118         struct list_head maplist;       /**< Linked list of regions */
1119         struct drm_open_hash map_hash;  /**< User token hash table for maps */
1120 
1121         /** \name Context handle management */
1122         /*@{ */
1123         struct list_head ctxlist;       /**< Linked list of context handles */
1124         struct mutex ctxlist_mutex;     /**< For ctxlist */
1125 
1126         struct idr ctx_idr;
1127 
1128         struct list_head vmalist;       /**< List of vmas (for debugging) */
1129 
1130         /*@} */
1131 
1132         /** \name DMA support */
1133         /*@{ */
1134         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
1135         /*@} */
1136 
1137         /** \name Context support */
1138         /*@{ */
1139         bool irq_enabled;               /**< True if irq handler is enabled */
1140         __volatile__ long context_flag; /**< Context swapping flag */
1141         int last_context;               /**< Last current context */
1142         /*@} */
1143 
1144         /** \name VBLANK IRQ support */
1145         /*@{ */
1146 
1147         /*
1148          * At load time, disabling the vblank interrupt won't be allowed since
1149          * old clients may not call the modeset ioctl and therefore misbehave.
1150          * Once the modeset ioctl *has* been called though, we can safely
1151          * disable them when unused.
1152          */
1153         bool vblank_disable_allowed;
1154 
1155         /* array of size num_crtcs */
1156         struct drm_vblank_crtc *vblank;
1157 
1158         spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
1159         spinlock_t vbl_lock;
1160         struct timer_list vblank_disable_timer;
1161 
1162         u32 max_vblank_count;           /**< size of vblank counter register */
1163 
1164         /**
1165          * List of events
1166          */
1167         struct list_head vblank_event_list;
1168         spinlock_t event_lock;
1169 
1170         /*@} */
1171 
1172         struct drm_agp_head *agp;       /**< AGP data */
1173 
1174         struct device *dev;             /**< Device structure */
1175         struct pci_dev *pdev;           /**< PCI device structure */
1176 #ifdef __alpha__
1177         struct pci_controller *hose;
1178 #endif
1179 
1180         struct platform_device *platformdev; /**< Platform device struture */
1181         struct usb_device *usbdev;
1182 
1183         struct drm_sg_mem *sg;  /**< Scatter gather memory */
1184         unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
1185         void *dev_private;              /**< device private data */
1186         struct address_space *dev_mapping;
1187         struct drm_sigdata sigdata;        /**< For block_all_signals */
1188         sigset_t sigmask;
1189 
1190         struct drm_driver *driver;
1191         struct drm_local_map *agp_buffer_map;
1192         unsigned int agp_buffer_token;
1193         struct drm_minor *control;              /**< Control node for card */
1194         struct drm_minor *primary;              /**< render type primary screen head */
1195         struct drm_minor *render;               /**< render node for card */
1196 
1197         struct drm_mode_config mode_config;     /**< Current mode config */
1198 
1199         /** \name GEM information */
1200         /*@{ */
1201         struct mutex object_name_lock;
1202         struct idr object_name_idr;
1203         struct drm_vma_offset_manager *vma_offset_manager;
1204         /*@} */
1205         int switch_power_state;
1206 
1207         atomic_t unplugged; /* device has been unplugged or gone away */
1208 };
1209 
1210 #define DRM_SWITCH_POWER_ON 0
1211 #define DRM_SWITCH_POWER_OFF 1
1212 #define DRM_SWITCH_POWER_CHANGING 2
1213 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1214 
1215 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1216                                              int feature)
1217 {
1218         return ((dev->driver->driver_features & feature) ? 1 : 0);
1219 }
1220 
1221 static inline int drm_dev_to_irq(struct drm_device *dev)
1222 {
1223         return dev->driver->bus->get_irq(dev);
1224 }
1225 
1226 static inline void drm_device_set_unplugged(struct drm_device *dev)
1227 {
1228         smp_wmb();
1229         atomic_set(&dev->unplugged, 1);
1230 }
1231 
1232 static inline int drm_device_is_unplugged(struct drm_device *dev)
1233 {
1234         int ret = atomic_read(&dev->unplugged);
1235         smp_rmb();
1236         return ret;
1237 }
1238 
1239 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1240 {
1241         return mutex_is_locked(&dev->mode_config.mutex);
1242 }
1243 
1244 static inline bool drm_is_render_client(struct drm_file *file_priv)
1245 {
1246         return file_priv->minor->type == DRM_MINOR_RENDER;
1247 }
1248 
1249 /******************************************************************/
1250 /** \name Internal function definitions */
1251 /*@{*/
1252 
1253                                 /* Driver support (drm_drv.h) */
1254 extern long drm_ioctl(struct file *filp,
1255                       unsigned int cmd, unsigned long arg);
1256 extern long drm_compat_ioctl(struct file *filp,
1257                              unsigned int cmd, unsigned long arg);
1258 extern int drm_lastclose(struct drm_device *dev);
1259 
1260                                 /* Device support (drm_fops.h) */
1261 extern struct mutex drm_global_mutex;
1262 extern int drm_open(struct inode *inode, struct file *filp);
1263 extern int drm_stub_open(struct inode *inode, struct file *filp);
1264 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1265                         size_t count, loff_t *offset);
1266 extern int drm_release(struct inode *inode, struct file *filp);
1267 
1268                                 /* Mapping support (drm_vm.h) */
1269 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1270 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1271 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1272 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1273 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1274 
1275                                 /* Memory management support (drm_memory.h) */
1276 #include <drm/drm_memory.h>
1277 
1278 
1279                                 /* Misc. IOCTL support (drm_ioctl.h) */
1280 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1281                             struct drm_file *file_priv);
1282 extern int drm_getunique(struct drm_device *dev, void *data,
1283                          struct drm_file *file_priv);
1284 extern int drm_setunique(struct drm_device *dev, void *data,
1285                          struct drm_file *file_priv);
1286 extern int drm_getmap(struct drm_device *dev, void *data,
1287                       struct drm_file *file_priv);
1288 extern int drm_getclient(struct drm_device *dev, void *data,
1289                          struct drm_file *file_priv);
1290 extern int drm_getstats(struct drm_device *dev, void *data,
1291                         struct drm_file *file_priv);
1292 extern int drm_getcap(struct drm_device *dev, void *data,
1293                       struct drm_file *file_priv);
1294 extern int drm_setclientcap(struct drm_device *dev, void *data,
1295                             struct drm_file *file_priv);
1296 extern int drm_setversion(struct drm_device *dev, void *data,
1297                           struct drm_file *file_priv);
1298 extern int drm_noop(struct drm_device *dev, void *data,
1299                     struct drm_file *file_priv);
1300 
1301                                 /* Context IOCTL support (drm_context.h) */
1302 extern int drm_resctx(struct drm_device *dev, void *data,
1303                       struct drm_file *file_priv);
1304 extern int drm_addctx(struct drm_device *dev, void *data,
1305                       struct drm_file *file_priv);
1306 extern int drm_getctx(struct drm_device *dev, void *data,
1307                       struct drm_file *file_priv);
1308 extern int drm_switchctx(struct drm_device *dev, void *data,
1309                          struct drm_file *file_priv);
1310 extern int drm_newctx(struct drm_device *dev, void *data,
1311                       struct drm_file *file_priv);
1312 extern int drm_rmctx(struct drm_device *dev, void *data,
1313                      struct drm_file *file_priv);
1314 
1315 extern int drm_ctxbitmap_init(struct drm_device *dev);
1316 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1317 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1318 
1319 extern int drm_setsareactx(struct drm_device *dev, void *data,
1320                            struct drm_file *file_priv);
1321 extern int drm_getsareactx(struct drm_device *dev, void *data,
1322                            struct drm_file *file_priv);
1323 
1324                                 /* Authentication IOCTL support (drm_auth.h) */
1325 extern int drm_getmagic(struct drm_device *dev, void *data,
1326                         struct drm_file *file_priv);
1327 extern int drm_authmagic(struct drm_device *dev, void *data,
1328                          struct drm_file *file_priv);
1329 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1330 
1331 /* Cache management (drm_cache.c) */
1332 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1333 void drm_clflush_sg(struct sg_table *st);
1334 void drm_clflush_virt_range(char *addr, unsigned long length);
1335 
1336                                 /* Locking IOCTL support (drm_lock.h) */
1337 extern int drm_lock(struct drm_device *dev, void *data,
1338                     struct drm_file *file_priv);
1339 extern int drm_unlock(struct drm_device *dev, void *data,
1340                       struct drm_file *file_priv);
1341 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1342 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1343 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1344 
1345 /*
1346  * These are exported to drivers so that they can implement fencing using
1347  * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1348  */
1349 
1350 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1351 
1352                                 /* Buffer management support (drm_bufs.h) */
1353 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1354 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1355 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1356                       unsigned int size, enum drm_map_type type,
1357                       enum drm_map_flags flags, struct drm_local_map **map_ptr);
1358 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1359                             struct drm_file *file_priv);
1360 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1361 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1362 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1363                            struct drm_file *file_priv);
1364 extern int drm_addbufs(struct drm_device *dev, void *data,
1365                        struct drm_file *file_priv);
1366 extern int drm_infobufs(struct drm_device *dev, void *data,
1367                         struct drm_file *file_priv);
1368 extern int drm_markbufs(struct drm_device *dev, void *data,
1369                         struct drm_file *file_priv);
1370 extern int drm_freebufs(struct drm_device *dev, void *data,
1371                         struct drm_file *file_priv);
1372 extern int drm_mapbufs(struct drm_device *dev, void *data,
1373                        struct drm_file *file_priv);
1374 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1375                          struct drm_file *file_priv);
1376 
1377                                 /* DMA support (drm_dma.h) */
1378 extern int drm_legacy_dma_setup(struct drm_device *dev);
1379 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1380 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1381 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1382                                      struct drm_file *filp);
1383 
1384                                 /* IRQ support (drm_irq.h) */
1385 extern int drm_control(struct drm_device *dev, void *data,
1386                        struct drm_file *file_priv);
1387 extern int drm_irq_install(struct drm_device *dev);
1388 extern int drm_irq_uninstall(struct drm_device *dev);
1389 
1390 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1391 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1392                            struct drm_file *filp);
1393 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1394 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1395                                      struct timeval *vblanktime);
1396 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1397                                      struct drm_pending_vblank_event *e);
1398 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1399 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1400 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1401 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1402 extern void drm_vblank_cleanup(struct drm_device *dev);
1403 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1404                                      struct timeval *tvblank, unsigned flags);
1405 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1406                                                  int crtc, int *max_error,
1407                                                  struct timeval *vblank_time,
1408                                                  unsigned flags,
1409                                                  const struct drm_crtc *refcrtc,
1410                                                  const struct drm_display_mode *mode);
1411 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1412                                             const struct drm_display_mode *mode);
1413 
1414 extern bool
1415 drm_mode_parse_command_line_for_connector(const char *mode_option,
1416                                           struct drm_connector *connector,
1417                                           struct drm_cmdline_mode *mode);
1418 
1419 extern struct drm_display_mode *
1420 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1421                                   struct drm_cmdline_mode *cmd);
1422 
1423 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1424                                            struct drm_display_mode *dmode);
1425 extern int of_get_drm_display_mode(struct device_node *np,
1426                                    struct drm_display_mode *dmode,
1427                                    int index);
1428 
1429 /* Modesetting support */
1430 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1431 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1432 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1433                            struct drm_file *file_priv);
1434 
1435                                 /* AGP/GART support (drm_agpsupport.h) */
1436 
1437 #include <drm/drm_agpsupport.h>
1438 
1439                                 /* Stub support (drm_stub.h) */
1440 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1441                                struct drm_file *file_priv);
1442 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1443                                 struct drm_file *file_priv);
1444 struct drm_master *drm_master_create(struct drm_minor *minor);
1445 extern struct drm_master *drm_master_get(struct drm_master *master);
1446 extern void drm_master_put(struct drm_master **master);
1447 
1448 extern void drm_put_dev(struct drm_device *dev);
1449 extern void drm_unplug_dev(struct drm_device *dev);
1450 extern unsigned int drm_debug;
1451 extern unsigned int drm_rnodes;
1452 
1453 extern unsigned int drm_vblank_offdelay;
1454 extern unsigned int drm_timestamp_precision;
1455 extern unsigned int drm_timestamp_monotonic;
1456 
1457 extern struct class *drm_class;
1458 extern struct dentry *drm_debugfs_root;
1459 
1460 extern struct idr drm_minors_idr;
1461 
1462 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1463 
1464                                 /* Debugfs support */
1465 #if defined(CONFIG_DEBUG_FS)
1466 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1467                             struct dentry *root);
1468 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1469                                     int count, struct dentry *root,
1470                                     struct drm_minor *minor);
1471 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1472                                     int count, struct drm_minor *minor);
1473 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1474 #else
1475 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1476                                    struct dentry *root)
1477 {
1478         return 0;
1479 }
1480 
1481 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1482                                            int count, struct dentry *root,
1483                                            struct drm_minor *minor)
1484 {
1485         return 0;
1486 }
1487 
1488 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1489                                            int count, struct drm_minor *minor)
1490 {
1491         return 0;
1492 }
1493 
1494 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1495 {
1496         return 0;
1497 }
1498 #endif
1499 
1500                                 /* Info file support */
1501 extern int drm_name_info(struct seq_file *m, void *data);
1502 extern int drm_vm_info(struct seq_file *m, void *data);
1503 extern int drm_bufs_info(struct seq_file *m, void *data);
1504 extern int drm_vblank_info(struct seq_file *m, void *data);
1505 extern int drm_clients_info(struct seq_file *m, void* data);
1506 extern int drm_gem_name_info(struct seq_file *m, void *data);
1507 
1508 
1509 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1510                 struct drm_gem_object *obj, int flags);
1511 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1512                 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1513                 int *prime_fd);
1514 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1515                 struct dma_buf *dma_buf);
1516 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1517                 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1518 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1519 
1520 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1521                                         struct drm_file *file_priv);
1522 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1523                                         struct drm_file *file_priv);
1524 
1525 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1526                                             dma_addr_t *addrs, int max_pages);
1527 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1528 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1529 
1530 int drm_gem_dumb_destroy(struct drm_file *file,
1531                          struct drm_device *dev,
1532                          uint32_t handle);
1533 
1534 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1535 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1536 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1537 
1538 #if DRM_DEBUG_CODE
1539 extern int drm_vma_info(struct seq_file *m, void *data);
1540 #endif
1541 
1542                                 /* Scatter Gather Support (drm_scatter.h) */
1543 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1544 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1545                         struct drm_file *file_priv);
1546 extern int drm_sg_free(struct drm_device *dev, void *data,
1547                        struct drm_file *file_priv);
1548 
1549                                /* ATI PCIGART support (ati_pcigart.h) */
1550 extern int drm_ati_pcigart_init(struct drm_device *dev,
1551                                 struct drm_ati_pcigart_info * gart_info);
1552 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1553                                    struct drm_ati_pcigart_info * gart_info);
1554 
1555 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1556                                        size_t align);
1557 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1558 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1559 
1560                                /* sysfs support (drm_sysfs.c) */
1561 struct drm_sysfs_class;
1562 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1563 extern void drm_sysfs_destroy(void);
1564 extern int drm_sysfs_device_add(struct drm_minor *minor);
1565 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1566 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1567 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1568 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1569 
1570 /* Graphics Execution Manager library functions (drm_gem.c) */
1571 int drm_gem_init(struct drm_device *dev);
1572 void drm_gem_destroy(struct drm_device *dev);
1573 void drm_gem_object_release(struct drm_gem_object *obj);
1574 void drm_gem_object_free(struct kref *kref);
1575 int drm_gem_object_init(struct drm_device *dev,
1576                         struct drm_gem_object *obj, size_t size);
1577 void drm_gem_private_object_init(struct drm_device *dev,
1578                                  struct drm_gem_object *obj, size_t size);
1579 void drm_gem_vm_open(struct vm_area_struct *vma);
1580 void drm_gem_vm_close(struct vm_area_struct *vma);
1581 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1582                      struct vm_area_struct *vma);
1583 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1584 
1585 #include <drm/drm_global.h>
1586 
1587 static inline void
1588 drm_gem_object_reference(struct drm_gem_object *obj)
1589 {
1590         kref_get(&obj->refcount);
1591 }
1592 
1593 static inline void
1594 drm_gem_object_unreference(struct drm_gem_object *obj)
1595 {
1596         if (obj != NULL)
1597                 kref_put(&obj->refcount, drm_gem_object_free);
1598 }
1599 
1600 static inline void
1601 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1602 {
1603         if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1604                 struct drm_device *dev = obj->dev;
1605 
1606                 mutex_lock(&dev->struct_mutex);
1607                 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1608                         drm_gem_object_free(&obj->refcount);
1609                 mutex_unlock(&dev->struct_mutex);
1610         }
1611 }
1612 
1613 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1614                                struct drm_gem_object *obj,
1615                                u32 *handlep);
1616 int drm_gem_handle_create(struct drm_file *file_priv,
1617                           struct drm_gem_object *obj,
1618                           u32 *handlep);
1619 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1620 
1621 
1622 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1623 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1624 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1625 
1626 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1627 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1628                 bool dirty, bool accessed);
1629 
1630 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1631                                              struct drm_file *filp,
1632                                              u32 handle);
1633 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1634                         struct drm_file *file_priv);
1635 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1636                         struct drm_file *file_priv);
1637 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1638                        struct drm_file *file_priv);
1639 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1640 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1641 
1642 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1643 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1644 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1645 
1646 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1647                                                          unsigned int token)
1648 {
1649         struct drm_map_list *_entry;
1650         list_for_each_entry(_entry, &dev->maplist, head)
1651             if (_entry->user_token == token)
1652                 return _entry->map;
1653         return NULL;
1654 }
1655 
1656 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1657 {
1658 }
1659 
1660 #include <drm/drm_mem_util.h>
1661 
1662 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1663                                  struct device *parent);
1664 void drm_dev_free(struct drm_device *dev);
1665 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1666 void drm_dev_unregister(struct drm_device *dev);
1667 /*@}*/
1668 
1669 /* PCI section */
1670 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1671 {
1672         if (dev->driver->device_is_agp != NULL) {
1673                 int err = (*dev->driver->device_is_agp) (dev);
1674 
1675                 if (err != 2) {
1676                         return err;
1677                 }
1678         }
1679 
1680         return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1681 }
1682 void drm_pci_agp_destroy(struct drm_device *dev);
1683 
1684 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1685 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1686 extern int drm_get_pci_dev(struct pci_dev *pdev,
1687                            const struct pci_device_id *ent,
1688                            struct drm_driver *driver);
1689 
1690 #define DRM_PCIE_SPEED_25 1
1691 #define DRM_PCIE_SPEED_50 2
1692 #define DRM_PCIE_SPEED_80 4
1693 
1694 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1695 
1696 /* platform section */
1697 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1698 
1699 /* returns true if currently okay to sleep */
1700 static __inline__ bool drm_can_sleep(void)
1701 {
1702         if (in_atomic() || in_dbg_master() || irqs_disabled())
1703                 return false;
1704         return true;
1705 }
1706 
1707 #endif                          /* __KERNEL__ */
1708 #endif
1709 

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