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

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