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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  * All rights reserved.
 13  *
 14  * Permission is hereby granted, free of charge, to any person obtaining a
 15  * copy of this software and associated documentation files (the "Software"),
 16  * to deal in the Software without restriction, including without limitation
 17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 18  * and/or sell copies of the Software, and to permit persons to whom the
 19  * Software is furnished to do so, subject to the following conditions:
 20  *
 21  * The above copyright notice and this permission notice (including the next
 22  * paragraph) shall be included in all copies or substantial portions of the
 23  * Software.
 24  *
 25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 26  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 27  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 28  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 29  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 30  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 31  * OTHER DEALINGS IN THE SOFTWARE.
 32  */
 33 
 34 #ifndef _DRM_P_H_
 35 #define _DRM_P_H_
 36 
 37 #ifdef __KERNEL__
 38 #ifdef __alpha__
 39 /* add include of current.h so that "current" is defined
 40  * before static inline funcs in wait.h. Doing this so we
 41  * can build the DRM (part of PI DRI). 4/21/2000 S + B */
 42 #include <asm/current.h>
 43 #endif                          /* __alpha__ */
 44 #include <linux/module.h>
 45 #include <linux/kernel.h>
 46 #include <linux/miscdevice.h>
 47 #include <linux/fs.h>
 48 #include <linux/proc_fs.h>
 49 #include <linux/init.h>
 50 #include <linux/file.h>
 51 #include <linux/pci.h>
 52 #include <linux/jiffies.h>
 53 #include <linux/smp_lock.h>     /* For (un)lock_kernel */
 54 #include <linux/dma-mapping.h>
 55 #include <linux/mm.h>
 56 #include <linux/cdev.h>
 57 #include <linux/mutex.h>
 58 #if defined(__alpha__) || defined(__powerpc__)
 59 #include <asm/pgtable.h>        /* For pte_wrprotect */
 60 #endif
 61 #include <asm/io.h>
 62 #include <asm/mman.h>
 63 #include <asm/uaccess.h>
 64 #ifdef CONFIG_MTRR
 65 #include <asm/mtrr.h>
 66 #endif
 67 #if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
 68 #include <linux/types.h>
 69 #include <linux/agp_backend.h>
 70 #endif
 71 #include <linux/workqueue.h>
 72 #include <linux/poll.h>
 73 #include <asm/pgalloc.h>
 74 #include "drm.h"
 75 
 76 #include <linux/idr.h>
 77 
 78 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
 79 #define __OS_HAS_MTRR (defined(CONFIG_MTRR))
 80 
 81 struct drm_file;
 82 struct drm_device;
 83 
 84 #include "drm_os_linux.h"
 85 #include "drm_hashtab.h"
 86 #include "drm_mm.h"
 87 
 88 #define DRM_UT_CORE             0x01
 89 #define DRM_UT_DRIVER           0x02
 90 #define DRM_UT_KMS              0x04
 91 /*
 92  * Three debug levels are defined.
 93  * drm_core, drm_driver, drm_kms
 94  * drm_core level can be used in the generic drm code. For example:
 95  *      drm_ioctl, drm_mm, drm_memory
 96  * The macro definiton of DRM_DEBUG is used.
 97  *      DRM_DEBUG(fmt, args...)
 98  *      The debug info by using the DRM_DEBUG can be obtained by adding
 99  *      the boot option of "drm.debug=1".
100  *
101  * drm_driver level can be used in the specific drm driver. It is used
102  * to add the debug info related with the drm driver. For example:
103  * i915_drv, i915_dma, i915_gem, radeon_drv,
104  *      The macro definition of DRM_DEBUG_DRIVER can be used.
105  *      DRM_DEBUG_DRIVER(fmt, args...)
106  *      The debug info by using the DRM_DEBUG_DRIVER can be obtained by
107  *      adding the boot option of "drm.debug=0x02"
108  *
109  * drm_kms level can be used in the KMS code related with specific drm driver.
110  * It is used to add the debug info related with KMS mode. For example:
111  * the connector/crtc ,
112  *      The macro definition of DRM_DEBUG_KMS can be used.
113  *      DRM_DEBUG_KMS(fmt, args...)
114  *      The debug info by using the DRM_DEBUG_KMS can be obtained by
115  *      adding the boot option of "drm.debug=0x04"
116  *
117  * If we add the boot option of "drm.debug=0x06", we can get the debug info by
118  * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
119  * If we add the boot option of "drm.debug=0x05", we can get the debug info by
120  * using the DRM_DEBUG_KMS and DRM_DEBUG.
121  */
122 
123 extern void drm_ut_debug_printk(unsigned int request_level,
124                                 const char *prefix,
125                                 const char *function_name,
126                                 const char *format, ...);
127 /***********************************************************************/
128 /** \name DRM template customization defaults */
129 /*@{*/
130 
131 /* driver capabilities and requirements mask */
132 #define DRIVER_USE_AGP     0x1
133 #define DRIVER_REQUIRE_AGP 0x2
134 #define DRIVER_USE_MTRR    0x4
135 #define DRIVER_PCI_DMA     0x8
136 #define DRIVER_SG          0x10
137 #define DRIVER_HAVE_DMA    0x20
138 #define DRIVER_HAVE_IRQ    0x40
139 #define DRIVER_IRQ_SHARED  0x80
140 #define DRIVER_IRQ_VBL     0x100
141 #define DRIVER_DMA_QUEUE   0x200
142 #define DRIVER_FB_DMA      0x400
143 #define DRIVER_IRQ_VBL2    0x800
144 #define DRIVER_GEM         0x1000
145 #define DRIVER_MODESET     0x2000
146 
147 /***********************************************************************/
148 /** \name Begin the DRM... */
149 /*@{*/
150 
151 #define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
152                                      also include looping detection. */
153 
154 #define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
155 #define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
156 #define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
157 #define DRM_LOOPING_LIMIT     5000000
158 #define DRM_TIME_SLICE        (HZ/20)  /**< Time slice for GLXContexts */
159 #define DRM_LOCK_SLICE        1 /**< Time slice for lock, in jiffies */
160 
161 #define DRM_FLAG_DEBUG    0x01
162 
163 #define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
164 #define DRM_MAP_HASH_OFFSET 0x10000000
165 
166 /*@}*/
167 
168 /***********************************************************************/
169 /** \name Macros to make printk easier */
170 /*@{*/
171 
172 /**
173  * Error output.
174  *
175  * \param fmt printf() like format string.
176  * \param arg arguments
177  */
178 #define DRM_ERROR(fmt, arg...) \
179         printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __func__ , ##arg)
180 
181 /**
182  * Memory error output.
183  *
184  * \param area memory area where the error occurred.
185  * \param fmt printf() like format string.
186  * \param arg arguments
187  */
188 #define DRM_MEM_ERROR(area, fmt, arg...) \
189         printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __func__, \
190                drm_mem_stats[area].name , ##arg)
191 
192 #define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)
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 #define DRM_PROC_LIMIT (PAGE_SIZE-80)
249 
250 #define DRM_PROC_PRINT(fmt, arg...)                                     \
251    len += sprintf(&buf[len], fmt , ##arg);                              \
252    if (len > DRM_PROC_LIMIT) { *eof = 1; return len - offset; }
253 
254 #define DRM_PROC_PRINT_RET(ret, fmt, arg...)                            \
255    len += sprintf(&buf[len], fmt , ##arg);                              \
256    if (len > DRM_PROC_LIMIT) { ret; *eof = 1; return len - offset; }
257 
258 /*@}*/
259 
260 /***********************************************************************/
261 /** \name Internal types and structures */
262 /*@{*/
263 
264 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
265 
266 #define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
267 #define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
268 #define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)
269 
270 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
271 /**
272  * Get the private SAREA mapping.
273  *
274  * \param _dev DRM device.
275  * \param _ctx context number.
276  * \param _map output mapping.
277  */
278 #define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {       \
279         (_map) = (_dev)->context_sareas[_ctx];          \
280 } while(0)
281 
282 /**
283  * Test that the hardware lock is held by the caller, returning otherwise.
284  *
285  * \param dev DRM device.
286  * \param filp file pointer of the caller.
287  */
288 #define LOCK_TEST_WITH_RETURN( dev, _file_priv )                                \
289 do {                                                                            \
290         if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||       \
291             _file_priv->master->lock.file_priv != _file_priv)   {               \
292                 DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
293                            __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
294                            _file_priv->master->lock.file_priv, _file_priv);     \
295                 return -EINVAL;                                                 \
296         }                                                                       \
297 } while (0)
298 
299 /**
300  * Copy and IOCTL return string to user space
301  */
302 #define DRM_COPY( name, value )                                         \
303         len = strlen( value );                                          \
304         if ( len > name##_len ) len = name##_len;                       \
305         name##_len = strlen( value );                                   \
306         if ( len && name ) {                                            \
307                 if ( copy_to_user( name, value, len ) )                 \
308                         return -EFAULT;                                 \
309         }
310 
311 /**
312  * Ioctl function type.
313  *
314  * \param inode device inode.
315  * \param file_priv DRM file private pointer.
316  * \param cmd command.
317  * \param arg argument.
318  */
319 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
320                         struct drm_file *file_priv);
321 
322 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
323                                unsigned long arg);
324 
325 #define DRM_AUTH        0x1
326 #define DRM_MASTER      0x2
327 #define DRM_ROOT_ONLY   0x4
328 #define DRM_CONTROL_ALLOW 0x8
329 
330 struct drm_ioctl_desc {
331         unsigned int cmd;
332         int flags;
333         drm_ioctl_t *func;
334 };
335 
336 /**
337  * Creates a driver or general drm_ioctl_desc array entry for the given
338  * ioctl, for use by drm_ioctl().
339  */
340 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
341         [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags}
342 
343 struct drm_magic_entry {
344         struct list_head head;
345         struct drm_hash_item hash_item;
346         struct drm_file *priv;
347 };
348 
349 struct drm_vma_entry {
350         struct list_head head;
351         struct vm_area_struct *vma;
352         pid_t pid;
353 };
354 
355 /**
356  * DMA buffer.
357  */
358 struct drm_buf {
359         int idx;                       /**< Index into master buflist */
360         int total;                     /**< Buffer size */
361         int order;                     /**< log-base-2(total) */
362         int used;                      /**< Amount of buffer in use (for DMA) */
363         unsigned long offset;          /**< Byte offset (used internally) */
364         void *address;                 /**< Address of buffer */
365         unsigned long bus_address;     /**< Bus address of buffer */
366         struct drm_buf *next;          /**< Kernel-only: used for free list */
367         __volatile__ int waiting;      /**< On kernel DMA queue */
368         __volatile__ int pending;      /**< On hardware DMA queue */
369         wait_queue_head_t dma_wait;    /**< Processes waiting */
370         struct drm_file *file_priv;    /**< Private of holding file descr */
371         int context;                   /**< Kernel queue for this buffer */
372         int while_locked;              /**< Dispatch this buffer while locked */
373         enum {
374                 DRM_LIST_NONE = 0,
375                 DRM_LIST_FREE = 1,
376                 DRM_LIST_WAIT = 2,
377                 DRM_LIST_PEND = 3,
378                 DRM_LIST_PRIO = 4,
379                 DRM_LIST_RECLAIM = 5
380         } list;                        /**< Which list we're on */
381 
382         int dev_priv_size;               /**< Size of buffer private storage */
383         void *dev_private;               /**< Per-buffer private storage */
384 };
385 
386 /** bufs is one longer than it has to be */
387 struct drm_waitlist {
388         int count;                      /**< Number of possible buffers */
389         struct drm_buf **bufs;          /**< List of pointers to buffers */
390         struct drm_buf **rp;                    /**< Read pointer */
391         struct drm_buf **wp;                    /**< Write pointer */
392         struct drm_buf **end;           /**< End pointer */
393         spinlock_t read_lock;
394         spinlock_t write_lock;
395 };
396 
397 struct drm_freelist {
398         int initialized;               /**< Freelist in use */
399         atomic_t count;                /**< Number of free buffers */
400         struct drm_buf *next;          /**< End pointer */
401 
402         wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
403         int low_mark;                  /**< Low water mark */
404         int high_mark;                 /**< High water mark */
405         atomic_t wfh;                  /**< If waiting for high mark */
406         spinlock_t lock;
407 };
408 
409 typedef struct drm_dma_handle {
410         dma_addr_t busaddr;
411         void *vaddr;
412         size_t size;
413 } drm_dma_handle_t;
414 
415 /**
416  * Buffer entry.  There is one of this for each buffer size order.
417  */
418 struct drm_buf_entry {
419         int buf_size;                   /**< size */
420         int buf_count;                  /**< number of buffers */
421         struct drm_buf *buflist;                /**< buffer list */
422         int seg_count;
423         int page_order;
424         struct drm_dma_handle **seglist;
425 
426         struct drm_freelist freelist;
427 };
428 
429 /** File private data */
430 struct drm_file {
431         int authenticated;
432         pid_t pid;
433         uid_t uid;
434         drm_magic_t magic;
435         unsigned long ioctl_count;
436         struct list_head lhead;
437         struct drm_minor *minor;
438         unsigned long lock_count;
439 
440         /** Mapping of mm object handles to object pointers. */
441         struct idr object_idr;
442         /** Lock for synchronization of access to object_idr. */
443         spinlock_t table_lock;
444 
445         struct file *filp;
446         void *driver_priv;
447 
448         int is_master; /* this file private is a master for a minor */
449         struct drm_master *master; /* master this node is currently associated with
450                                       N.B. not always minor->master */
451         struct list_head fbs;
452 };
453 
454 /** Wait queue */
455 struct drm_queue {
456         atomic_t use_count;             /**< Outstanding uses (+1) */
457         atomic_t finalization;          /**< Finalization in progress */
458         atomic_t block_count;           /**< Count of processes waiting */
459         atomic_t block_read;            /**< Queue blocked for reads */
460         wait_queue_head_t read_queue;   /**< Processes waiting on block_read */
461         atomic_t block_write;           /**< Queue blocked for writes */
462         wait_queue_head_t write_queue;  /**< Processes waiting on block_write */
463         atomic_t total_queued;          /**< Total queued statistic */
464         atomic_t total_flushed;         /**< Total flushes statistic */
465         atomic_t total_locks;           /**< Total locks statistics */
466         enum drm_ctx_flags flags;       /**< Context preserving and 2D-only */
467         struct drm_waitlist waitlist;   /**< Pending buffers */
468         wait_queue_head_t flush_queue;  /**< Processes waiting until flush */
469 };
470 
471 /**
472  * Lock data.
473  */
474 struct drm_lock_data {
475         struct drm_hw_lock *hw_lock;    /**< Hardware lock */
476         /** Private of lock holder's file (NULL=kernel) */
477         struct drm_file *file_priv;
478         wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
479         unsigned long lock_time;        /**< Time of last lock in jiffies */
480         spinlock_t spinlock;
481         uint32_t kernel_waiters;
482         uint32_t user_waiters;
483         int idle_has_lock;
484 };
485 
486 /**
487  * DMA data.
488  */
489 struct drm_device_dma {
490 
491         struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   /**< buffers, grouped by their size order */
492         int buf_count;                  /**< total number of buffers */
493         struct drm_buf **buflist;               /**< Vector of pointers into drm_device_dma::bufs */
494         int seg_count;
495         int page_count;                 /**< number of pages */
496         unsigned long *pagelist;        /**< page list */
497         unsigned long byte_count;
498         enum {
499                 _DRM_DMA_USE_AGP = 0x01,
500                 _DRM_DMA_USE_SG = 0x02,
501                 _DRM_DMA_USE_FB = 0x04,
502                 _DRM_DMA_USE_PCI_RO = 0x08
503         } flags;
504 
505 };
506 
507 /**
508  * AGP memory entry.  Stored as a doubly linked list.
509  */
510 struct drm_agp_mem {
511         unsigned long handle;           /**< handle */
512         DRM_AGP_MEM *memory;
513         unsigned long bound;            /**< address */
514         int pages;
515         struct list_head head;
516 };
517 
518 /**
519  * AGP data.
520  *
521  * \sa drm_agp_init() and drm_device::agp.
522  */
523 struct drm_agp_head {
524         DRM_AGP_KERN agp_info;          /**< AGP device information */
525         struct list_head memory;
526         unsigned long mode;             /**< AGP mode */
527         struct agp_bridge_data *bridge;
528         int enabled;                    /**< whether the AGP bus as been enabled */
529         int acquired;                   /**< whether the AGP device has been acquired */
530         unsigned long base;
531         int agp_mtrr;
532         int cant_use_aperture;
533         unsigned long page_mask;
534 };
535 
536 /**
537  * Scatter-gather memory.
538  */
539 struct drm_sg_mem {
540         unsigned long handle;
541         void *virtual;
542         int pages;
543         struct page **pagelist;
544         dma_addr_t *busaddr;
545 };
546 
547 struct drm_sigdata {
548         int context;
549         struct drm_hw_lock *lock;
550 };
551 
552 
553 /**
554  * Kernel side of a mapping
555  */
556 struct drm_local_map {
557         resource_size_t offset;  /**< Requested physical address (0 for SAREA)*/
558         unsigned long size;      /**< Requested physical size (bytes) */
559         enum drm_map_type type;  /**< Type of memory to map */
560         enum drm_map_flags flags;        /**< Flags */
561         void *handle;            /**< User-space: "Handle" to pass to mmap() */
562                                  /**< Kernel-space: kernel-virtual address */
563         int mtrr;                /**< MTRR slot used */
564 };
565 
566 typedef struct drm_local_map drm_local_map_t;
567 
568 /**
569  * Mappings list
570  */
571 struct drm_map_list {
572         struct list_head head;          /**< list head */
573         struct drm_hash_item hash;
574         struct drm_local_map *map;      /**< mapping */
575         uint64_t user_token;
576         struct drm_master *master;
577         struct drm_mm_node *file_offset_node;   /**< fake offset */
578 };
579 
580 /**
581  * Context handle list
582  */
583 struct drm_ctx_list {
584         struct list_head head;          /**< list head */
585         drm_context_t handle;           /**< context handle */
586         struct drm_file *tag;           /**< associated fd private data */
587 };
588 
589 /* location of GART table */
590 #define DRM_ATI_GART_MAIN 1
591 #define DRM_ATI_GART_FB   2
592 
593 #define DRM_ATI_GART_PCI 1
594 #define DRM_ATI_GART_PCIE 2
595 #define DRM_ATI_GART_IGP 3
596 
597 struct drm_ati_pcigart_info {
598         int gart_table_location;
599         int gart_reg_if;
600         void *addr;
601         dma_addr_t bus_addr;
602         dma_addr_t table_mask;
603         struct drm_dma_handle *table_handle;
604         struct drm_local_map mapping;
605         int table_size;
606 };
607 
608 /**
609  * GEM specific mm private for tracking GEM objects
610  */
611 struct drm_gem_mm {
612         struct drm_mm offset_manager;   /**< Offset mgmt for buffer objects */
613         struct drm_open_hash offset_hash; /**< User token hash table for maps */
614 };
615 
616 /**
617  * This structure defines the drm_mm memory object, which will be used by the
618  * DRM for its buffer objects.
619  */
620 struct drm_gem_object {
621         /** Reference count of this object */
622         struct kref refcount;
623 
624         /** Handle count of this object. Each handle also holds a reference */
625         struct kref handlecount;
626 
627         /** Related drm device */
628         struct drm_device *dev;
629 
630         /** File representing the shmem storage */
631         struct file *filp;
632 
633         /* Mapping info for this object */
634         struct drm_map_list map_list;
635 
636         /**
637          * Size of the object, in bytes.  Immutable over the object's
638          * lifetime.
639          */
640         size_t size;
641 
642         /**
643          * Global name for this object, starts at 1. 0 means unnamed.
644          * Access is covered by the object_name_lock in the related drm_device
645          */
646         int name;
647 
648         /**
649          * Memory domains. These monitor which caches contain read/write data
650          * related to the object. When transitioning from one set of domains
651          * to another, the driver is called to ensure that caches are suitably
652          * flushed and invalidated
653          */
654         uint32_t read_domains;
655         uint32_t write_domain;
656 
657         /**
658          * While validating an exec operation, the
659          * new read/write domain values are computed here.
660          * They will be transferred to the above values
661          * at the point that any cache flushing occurs
662          */
663         uint32_t pending_read_domains;
664         uint32_t pending_write_domain;
665 
666         void *driver_private;
667 };
668 
669 #include "drm_crtc.h"
670 
671 /* per-master structure */
672 struct drm_master {
673 
674         struct kref refcount; /* refcount for this master */
675 
676         struct list_head head; /**< each minor contains a list of masters */
677         struct drm_minor *minor; /**< link back to minor we are a master for */
678 
679         char *unique;                   /**< Unique identifier: e.g., busid */
680         int unique_len;                 /**< Length of unique field */
681         int unique_size;                /**< amount allocated */
682 
683         int blocked;                    /**< Blocked due to VC switch? */
684 
685         /** \name Authentication */
686         /*@{ */
687         struct drm_open_hash magiclist;
688         struct list_head magicfree;
689         /*@} */
690 
691         struct drm_lock_data lock;      /**< Information on hardware lock */
692 
693         void *driver_priv; /**< Private structure for driver to use */
694 };
695 
696 /**
697  * DRM driver structure. This structure represent the common code for
698  * a family of cards. There will one drm_device for each card present
699  * in this family
700  */
701 struct drm_driver {
702         int (*load) (struct drm_device *, unsigned long flags);
703         int (*firstopen) (struct drm_device *);
704         int (*open) (struct drm_device *, struct drm_file *);
705         void (*preclose) (struct drm_device *, struct drm_file *file_priv);
706         void (*postclose) (struct drm_device *, struct drm_file *);
707         void (*lastclose) (struct drm_device *);
708         int (*unload) (struct drm_device *);
709         int (*suspend) (struct drm_device *, pm_message_t state);
710         int (*resume) (struct drm_device *);
711         int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
712         void (*dma_ready) (struct drm_device *);
713         int (*dma_quiescent) (struct drm_device *);
714         int (*context_ctor) (struct drm_device *dev, int context);
715         int (*context_dtor) (struct drm_device *dev, int context);
716         int (*kernel_context_switch) (struct drm_device *dev, int old,
717                                       int new);
718         void (*kernel_context_switch_unlock) (struct drm_device *dev);
719 
720         /**
721          * get_vblank_counter - get raw hardware vblank counter
722          * @dev: DRM device
723          * @crtc: counter to fetch
724          *
725          * Driver callback for fetching a raw hardware vblank counter
726          * for @crtc.  If a device doesn't have a hardware counter, the
727          * driver can simply return the value of drm_vblank_count and
728          * make the enable_vblank() and disable_vblank() hooks into no-ops,
729          * leaving interrupts enabled at all times.
730          *
731          * Wraparound handling and loss of events due to modesetting is dealt
732          * with in the DRM core code.
733          *
734          * RETURNS
735          * Raw vblank counter value.
736          */
737         u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
738 
739         /**
740          * enable_vblank - enable vblank interrupt events
741          * @dev: DRM device
742          * @crtc: which irq to enable
743          *
744          * Enable vblank interrupts for @crtc.  If the device doesn't have
745          * a hardware vblank counter, this routine should be a no-op, since
746          * interrupts will have to stay on to keep the count accurate.
747          *
748          * RETURNS
749          * Zero on success, appropriate errno if the given @crtc's vblank
750          * interrupt cannot be enabled.
751          */
752         int (*enable_vblank) (struct drm_device *dev, int crtc);
753 
754         /**
755          * disable_vblank - disable vblank interrupt events
756          * @dev: DRM device
757          * @crtc: which irq to enable
758          *
759          * Disable vblank interrupts for @crtc.  If the device doesn't have
760          * a hardware vblank counter, this routine should be a no-op, since
761          * interrupts will have to stay on to keep the count accurate.
762          */
763         void (*disable_vblank) (struct drm_device *dev, int crtc);
764 
765         /**
766          * Called by \c drm_device_is_agp.  Typically used to determine if a
767          * card is really attached to AGP or not.
768          *
769          * \param dev  DRM device handle
770          *
771          * \returns
772          * One of three values is returned depending on whether or not the
773          * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
774          * (return of 1), or may or may not be AGP (return of 2).
775          */
776         int (*device_is_agp) (struct drm_device *dev);
777 
778         /* these have to be filled in */
779 
780         irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
781         void (*irq_preinstall) (struct drm_device *dev);
782         int (*irq_postinstall) (struct drm_device *dev);
783         void (*irq_uninstall) (struct drm_device *dev);
784         void (*reclaim_buffers) (struct drm_device *dev,
785                                  struct drm_file * file_priv);
786         void (*reclaim_buffers_locked) (struct drm_device *dev,
787                                         struct drm_file *file_priv);
788         void (*reclaim_buffers_idlelocked) (struct drm_device *dev,
789                                             struct drm_file *file_priv);
790         resource_size_t (*get_map_ofs) (struct drm_local_map * map);
791         resource_size_t (*get_reg_ofs) (struct drm_device *dev);
792         void (*set_version) (struct drm_device *dev,
793                              struct drm_set_version *sv);
794 
795         /* Master routines */
796         int (*master_create)(struct drm_device *dev, struct drm_master *master);
797         void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
798 
799         int (*proc_init)(struct drm_minor *minor);
800         void (*proc_cleanup)(struct drm_minor *minor);
801         int (*debugfs_init)(struct drm_minor *minor);
802         void (*debugfs_cleanup)(struct drm_minor *minor);
803 
804         /**
805          * Driver-specific constructor for drm_gem_objects, to set up
806          * obj->driver_private.
807          *
808          * Returns 0 on success.
809          */
810         int (*gem_init_object) (struct drm_gem_object *obj);
811         void (*gem_free_object) (struct drm_gem_object *obj);
812 
813         /* vga arb irq handler */
814         void (*vgaarb_irq)(struct drm_device *dev, bool state);
815 
816         /* Driver private ops for this object */
817         struct vm_operations_struct *gem_vm_ops;
818 
819         int major;
820         int minor;
821         int patchlevel;
822         char *name;
823         char *desc;
824         char *date;
825 
826         u32 driver_features;
827         int dev_priv_size;
828         struct drm_ioctl_desc *ioctls;
829         int num_ioctls;
830         struct file_operations fops;
831         struct pci_driver pci_driver;
832         /* List of devices hanging off this driver */
833         struct list_head device_list;
834 };
835 
836 #define DRM_MINOR_UNASSIGNED 0
837 #define DRM_MINOR_LEGACY 1
838 #define DRM_MINOR_CONTROL 2
839 #define DRM_MINOR_RENDER 3
840 
841 
842 /**
843  * debugfs node list. This structure represents a debugfs file to
844  * be created by the drm core
845  */
846 struct drm_debugfs_list {
847         const char *name; /** file name */
848         int (*show)(struct seq_file*, void*); /** show callback */
849         u32 driver_features; /**< Required driver features for this entry */
850 };
851 
852 /**
853  * debugfs node structure. This structure represents a debugfs file.
854  */
855 struct drm_debugfs_node {
856         struct list_head list;
857         struct drm_minor *minor;
858         struct drm_debugfs_list *debugfs_ent;
859         struct dentry *dent;
860 };
861 
862 /**
863  * Info file list entry. This structure represents a debugfs or proc file to
864  * be created by the drm core
865  */
866 struct drm_info_list {
867         const char *name; /** file name */
868         int (*show)(struct seq_file*, void*); /** show callback */
869         u32 driver_features; /**< Required driver features for this entry */
870         void *data;
871 };
872 
873 /**
874  * debugfs node structure. This structure represents a debugfs file.
875  */
876 struct drm_info_node {
877         struct list_head list;
878         struct drm_minor *minor;
879         struct drm_info_list *info_ent;
880         struct dentry *dent;
881 };
882 
883 /**
884  * DRM minor structure. This structure represents a drm minor number.
885  */
886 struct drm_minor {
887         int index;                      /**< Minor device number */
888         int type;                       /**< Control or render */
889         dev_t device;                   /**< Device number for mknod */
890         struct device kdev;             /**< Linux device */
891         struct drm_device *dev;
892 
893         struct proc_dir_entry *proc_root;  /**< proc directory entry */
894         struct drm_info_node proc_nodes;
895         struct dentry *debugfs_root;
896         struct drm_info_node debugfs_nodes;
897 
898         struct drm_master *master; /* currently active master for this node */
899         struct list_head master_list;
900         struct drm_mode_group mode_group;
901 };
902 
903 /**
904  * DRM device structure. This structure represent a complete card that
905  * may contain multiple heads.
906  */
907 struct drm_device {
908         struct list_head driver_item;   /**< list of devices per driver */
909         char *devname;                  /**< For /proc/interrupts */
910         int if_version;                 /**< Highest interface version set */
911 
912         /** \name Locks */
913         /*@{ */
914         spinlock_t count_lock;          /**< For inuse, drm_device::open_count, drm_device::buf_use */
915         struct mutex struct_mutex;      /**< For others */
916         /*@} */
917 
918         /** \name Usage Counters */
919         /*@{ */
920         int open_count;                 /**< Outstanding files open */
921         atomic_t ioctl_count;           /**< Outstanding IOCTLs pending */
922         atomic_t vma_count;             /**< Outstanding vma areas open */
923         int buf_use;                    /**< Buffers in use -- cannot alloc */
924         atomic_t buf_alloc;             /**< Buffer allocation in progress */
925         /*@} */
926 
927         /** \name Performance counters */
928         /*@{ */
929         unsigned long counters;
930         enum drm_stat_type types[15];
931         atomic_t counts[15];
932         /*@} */
933 
934         struct list_head filelist;
935 
936         /** \name Memory management */
937         /*@{ */
938         struct list_head maplist;       /**< Linked list of regions */
939         int map_count;                  /**< Number of mappable regions */
940         struct drm_open_hash map_hash;  /**< User token hash table for maps */
941 
942         /** \name Context handle management */
943         /*@{ */
944         struct list_head ctxlist;       /**< Linked list of context handles */
945         int ctx_count;                  /**< Number of context handles */
946         struct mutex ctxlist_mutex;     /**< For ctxlist */
947 
948         struct idr ctx_idr;
949 
950         struct list_head vmalist;       /**< List of vmas (for debugging) */
951 
952         /*@} */
953 
954         /** \name DMA queues (contexts) */
955         /*@{ */
956         int queue_count;                /**< Number of active DMA queues */
957         int queue_reserved;               /**< Number of reserved DMA queues */
958         int queue_slots;                /**< Actual length of queuelist */
959         struct drm_queue **queuelist;   /**< Vector of pointers to DMA queues */
960         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
961         /*@} */
962 
963         /** \name Context support */
964         /*@{ */
965         int irq_enabled;                /**< True if irq handler is enabled */
966         __volatile__ long context_flag; /**< Context swapping flag */
967         __volatile__ long interrupt_flag; /**< Interruption handler flag */
968         __volatile__ long dma_flag;     /**< DMA dispatch flag */
969         struct timer_list timer;        /**< Timer for delaying ctx switch */
970         wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
971         int last_checked;               /**< Last context checked for DMA */
972         int last_context;               /**< Last current context */
973         unsigned long last_switch;      /**< jiffies at last context switch */
974         /*@} */
975 
976         struct work_struct work;
977         /** \name VBLANK IRQ support */
978         /*@{ */
979 
980         /*
981          * At load time, disabling the vblank interrupt won't be allowed since
982          * old clients may not call the modeset ioctl and therefore misbehave.
983          * Once the modeset ioctl *has* been called though, we can safely
984          * disable them when unused.
985          */
986         int vblank_disable_allowed;
987 
988         wait_queue_head_t *vbl_queue;   /**< VBLANK wait queue */
989         atomic_t *_vblank_count;        /**< number of VBLANK interrupts (driver must alloc the right number of counters) */
990         spinlock_t vbl_lock;
991         atomic_t *vblank_refcount;      /* number of users of vblank interruptsper crtc */
992         u32 *last_vblank;               /* protected by dev->vbl_lock, used */
993                                         /* for wraparound handling */
994         int *vblank_enabled;            /* so we don't call enable more than
995                                            once per disable */
996         int *vblank_inmodeset;          /* Display driver is setting mode */
997         u32 *last_vblank_wait;          /* Last vblank seqno waited per CRTC */
998         struct timer_list vblank_disable_timer;
999 
1000         u32 max_vblank_count;           /**< size of vblank counter register */
1001 
1002         /*@} */
1003         cycles_t ctx_start;
1004         cycles_t lck_start;
1005 
1006         struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */
1007         wait_queue_head_t buf_readers;  /**< Processes waiting to read */
1008         wait_queue_head_t buf_writers;  /**< Processes waiting to ctx switch */
1009 
1010         struct drm_agp_head *agp;       /**< AGP data */
1011 
1012         struct pci_dev *pdev;           /**< PCI device structure */
1013         int pci_vendor;                 /**< PCI vendor id */
1014         int pci_device;                 /**< PCI device id */
1015 #ifdef __alpha__
1016         struct pci_controller *hose;
1017 #endif
1018         struct drm_sg_mem *sg;  /**< Scatter gather memory */
1019         unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
1020         void *dev_private;              /**< device private data */
1021         void *mm_private;
1022         struct address_space *dev_mapping;
1023         struct drm_sigdata sigdata;        /**< For block_all_signals */
1024         sigset_t sigmask;
1025 
1026         struct drm_driver *driver;
1027         struct drm_local_map *agp_buffer_map;
1028         unsigned int agp_buffer_token;
1029         struct drm_minor *control;              /**< Control node for card */
1030         struct drm_minor *primary;              /**< render type primary screen head */
1031 
1032         /** \name Drawable information */
1033         /*@{ */
1034         spinlock_t drw_lock;
1035         struct idr drw_idr;
1036         /*@} */
1037 
1038         struct drm_mode_config mode_config;     /**< Current mode config */
1039 
1040         /** \name GEM information */
1041         /*@{ */
1042         spinlock_t object_name_lock;
1043         struct idr object_name_idr;
1044         atomic_t object_count;
1045         atomic_t object_memory;
1046         atomic_t pin_count;
1047         atomic_t pin_memory;
1048         atomic_t gtt_count;
1049         atomic_t gtt_memory;
1050         uint32_t gtt_total;
1051         uint32_t invalidate_domains;    /* domains pending invalidation */
1052         uint32_t flush_domains;         /* domains pending flush */
1053         /*@} */
1054 
1055 };
1056 
1057 static inline int drm_dev_to_irq(struct drm_device *dev)
1058 {
1059         return dev->pdev->irq;
1060 }
1061 
1062 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1063                                              int feature)
1064 {
1065         return ((dev->driver->driver_features & feature) ? 1 : 0);
1066 }
1067 
1068 #ifdef __alpha__
1069 #define drm_get_pci_domain(dev) dev->hose->index
1070 #else
1071 #define drm_get_pci_domain(dev) 0
1072 #endif
1073 
1074 #if __OS_HAS_AGP
1075 static inline int drm_core_has_AGP(struct drm_device *dev)
1076 {
1077         return drm_core_check_feature(dev, DRIVER_USE_AGP);
1078 }
1079 #else
1080 #define drm_core_has_AGP(dev) (0)
1081 #endif
1082 
1083 #if __OS_HAS_MTRR
1084 static inline int drm_core_has_MTRR(struct drm_device *dev)
1085 {
1086         return drm_core_check_feature(dev, DRIVER_USE_MTRR);
1087 }
1088 
1089 #define DRM_MTRR_WC             MTRR_TYPE_WRCOMB
1090 
1091 static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1092                                unsigned int flags)
1093 {
1094         return mtrr_add(offset, size, flags, 1);
1095 }
1096 
1097 static inline int drm_mtrr_del(int handle, unsigned long offset,
1098                                unsigned long size, unsigned int flags)
1099 {
1100         return mtrr_del(handle, offset, size);
1101 }
1102 
1103 #else
1104 #define drm_core_has_MTRR(dev) (0)
1105 
1106 #define DRM_MTRR_WC             0
1107 
1108 static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1109                                unsigned int flags)
1110 {
1111         return 0;
1112 }
1113 
1114 static inline int drm_mtrr_del(int handle, unsigned long offset,
1115                                unsigned long size, unsigned int flags)
1116 {
1117         return 0;
1118 }
1119 #endif
1120 
1121 /******************************************************************/
1122 /** \name Internal function definitions */
1123 /*@{*/
1124 
1125                                 /* Driver support (drm_drv.h) */
1126 extern int drm_init(struct drm_driver *driver);
1127 extern void drm_exit(struct drm_driver *driver);
1128 extern int drm_ioctl(struct inode *inode, struct file *filp,
1129                      unsigned int cmd, unsigned long arg);
1130 extern long drm_compat_ioctl(struct file *filp,
1131                              unsigned int cmd, unsigned long arg);
1132 extern int drm_lastclose(struct drm_device *dev);
1133 
1134                                 /* Device support (drm_fops.h) */
1135 extern int drm_open(struct inode *inode, struct file *filp);
1136 extern int drm_stub_open(struct inode *inode, struct file *filp);
1137 extern int drm_fasync(int fd, struct file *filp, int on);
1138 extern int drm_release(struct inode *inode, struct file *filp);
1139 
1140                                 /* Mapping support (drm_vm.h) */
1141 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1142 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1143 extern void drm_vm_open_locked(struct vm_area_struct *vma);
1144 extern resource_size_t drm_core_get_map_ofs(struct drm_local_map * map);
1145 extern resource_size_t drm_core_get_reg_ofs(struct drm_device *dev);
1146 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1147 
1148                                 /* Memory management support (drm_memory.h) */
1149 #include "drm_memory.h"
1150 extern void drm_mem_init(void);
1151 extern int drm_mem_info(char *buf, char **start, off_t offset,
1152                         int request, int *eof, void *data);
1153 extern void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area);
1154 
1155 extern DRM_AGP_MEM *drm_alloc_agp(struct drm_device *dev, int pages, u32 type);
1156 extern int drm_free_agp(DRM_AGP_MEM * handle, int pages);
1157 extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
1158 extern DRM_AGP_MEM *drm_agp_bind_pages(struct drm_device *dev,
1159                                        struct page **pages,
1160                                        unsigned long num_pages,
1161                                        uint32_t gtt_offset,
1162                                        uint32_t type);
1163 extern int drm_unbind_agp(DRM_AGP_MEM * handle);
1164 
1165                                 /* Misc. IOCTL support (drm_ioctl.h) */
1166 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1167                             struct drm_file *file_priv);
1168 extern int drm_getunique(struct drm_device *dev, void *data,
1169                          struct drm_file *file_priv);
1170 extern int drm_setunique(struct drm_device *dev, void *data,
1171                          struct drm_file *file_priv);
1172 extern int drm_getmap(struct drm_device *dev, void *data,
1173                       struct drm_file *file_priv);
1174 extern int drm_getclient(struct drm_device *dev, void *data,
1175                          struct drm_file *file_priv);
1176 extern int drm_getstats(struct drm_device *dev, void *data,
1177                         struct drm_file *file_priv);
1178 extern int drm_setversion(struct drm_device *dev, void *data,
1179                           struct drm_file *file_priv);
1180 extern int drm_noop(struct drm_device *dev, void *data,
1181                     struct drm_file *file_priv);
1182 
1183                                 /* Context IOCTL support (drm_context.h) */
1184 extern int drm_resctx(struct drm_device *dev, void *data,
1185                       struct drm_file *file_priv);
1186 extern int drm_addctx(struct drm_device *dev, void *data,
1187                       struct drm_file *file_priv);
1188 extern int drm_modctx(struct drm_device *dev, void *data,
1189                       struct drm_file *file_priv);
1190 extern int drm_getctx(struct drm_device *dev, void *data,
1191                       struct drm_file *file_priv);
1192 extern int drm_switchctx(struct drm_device *dev, void *data,
1193                          struct drm_file *file_priv);
1194 extern int drm_newctx(struct drm_device *dev, void *data,
1195                       struct drm_file *file_priv);
1196 extern int drm_rmctx(struct drm_device *dev, void *data,
1197                      struct drm_file *file_priv);
1198 
1199 extern int drm_ctxbitmap_init(struct drm_device *dev);
1200 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1201 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1202 
1203 extern int drm_setsareactx(struct drm_device *dev, void *data,
1204                            struct drm_file *file_priv);
1205 extern int drm_getsareactx(struct drm_device *dev, void *data,
1206                            struct drm_file *file_priv);
1207 
1208                                 /* Drawable IOCTL support (drm_drawable.h) */
1209 extern int drm_adddraw(struct drm_device *dev, void *data,
1210                        struct drm_file *file_priv);
1211 extern int drm_rmdraw(struct drm_device *dev, void *data,
1212                       struct drm_file *file_priv);
1213 extern int drm_update_drawable_info(struct drm_device *dev, void *data,
1214                                     struct drm_file *file_priv);
1215 extern struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev,
1216                                                   drm_drawable_t id);
1217 extern void drm_drawable_free_all(struct drm_device *dev);
1218 
1219                                 /* Authentication IOCTL support (drm_auth.h) */
1220 extern int drm_getmagic(struct drm_device *dev, void *data,
1221                         struct drm_file *file_priv);
1222 extern int drm_authmagic(struct drm_device *dev, void *data,
1223                          struct drm_file *file_priv);
1224 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1225 
1226 /* Cache management (drm_cache.c) */
1227 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1228 
1229                                 /* Locking IOCTL support (drm_lock.h) */
1230 extern int drm_lock(struct drm_device *dev, void *data,
1231                     struct drm_file *file_priv);
1232 extern int drm_unlock(struct drm_device *dev, void *data,
1233                       struct drm_file *file_priv);
1234 extern int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context);
1235 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1236 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1237 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1238 
1239 /*
1240  * These are exported to drivers so that they can implement fencing using
1241  * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1242  */
1243 
1244 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1245 
1246                                 /* Buffer management support (drm_bufs.h) */
1247 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1248 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1249 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1250                       unsigned int size, enum drm_map_type type,
1251                       enum drm_map_flags flags, struct drm_local_map **map_ptr);
1252 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1253                             struct drm_file *file_priv);
1254 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1255 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1256 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1257                            struct drm_file *file_priv);
1258 extern int drm_addbufs(struct drm_device *dev, void *data,
1259                        struct drm_file *file_priv);
1260 extern int drm_infobufs(struct drm_device *dev, void *data,
1261                         struct drm_file *file_priv);
1262 extern int drm_markbufs(struct drm_device *dev, void *data,
1263                         struct drm_file *file_priv);
1264 extern int drm_freebufs(struct drm_device *dev, void *data,
1265                         struct drm_file *file_priv);
1266 extern int drm_mapbufs(struct drm_device *dev, void *data,
1267                        struct drm_file *file_priv);
1268 extern int drm_order(unsigned long size);
1269 extern resource_size_t drm_get_resource_start(struct drm_device *dev,
1270                                               unsigned int resource);
1271 extern resource_size_t drm_get_resource_len(struct drm_device *dev,
1272                                             unsigned int resource);
1273 
1274                                 /* DMA support (drm_dma.h) */
1275 extern int drm_dma_setup(struct drm_device *dev);
1276 extern void drm_dma_takedown(struct drm_device *dev);
1277 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1278 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1279                                      struct drm_file *filp);
1280 
1281                                 /* IRQ support (drm_irq.h) */
1282 extern int drm_control(struct drm_device *dev, void *data,
1283                        struct drm_file *file_priv);
1284 extern irqreturn_t drm_irq_handler(DRM_IRQ_ARGS);
1285 extern int drm_irq_install(struct drm_device *dev);
1286 extern int drm_irq_uninstall(struct drm_device *dev);
1287 extern void drm_driver_irq_preinstall(struct drm_device *dev);
1288 extern void drm_driver_irq_postinstall(struct drm_device *dev);
1289 extern void drm_driver_irq_uninstall(struct drm_device *dev);
1290 
1291 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1292 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1293                            struct drm_file *filp);
1294 extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
1295 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1296 extern void drm_handle_vblank(struct drm_device *dev, int crtc);
1297 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1298 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1299 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1300 extern void drm_vblank_cleanup(struct drm_device *dev);
1301 /* Modesetting support */
1302 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1303 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1304 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1305                            struct drm_file *file_priv);
1306 
1307                                 /* AGP/GART support (drm_agpsupport.h) */
1308 extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
1309 extern int drm_agp_acquire(struct drm_device *dev);
1310 extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
1311                                  struct drm_file *file_priv);
1312 extern int drm_agp_release(struct drm_device *dev);
1313 extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
1314                                  struct drm_file *file_priv);
1315 extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1316 extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
1317                                 struct drm_file *file_priv);
1318 extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
1319 extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
1320                         struct drm_file *file_priv);
1321 extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1322 extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
1323                          struct drm_file *file_priv);
1324 extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1325 extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
1326                         struct drm_file *file_priv);
1327 extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1328 extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
1329                           struct drm_file *file_priv);
1330 extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1331 extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
1332                         struct drm_file *file_priv);
1333 extern DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size_t pages, u32 type);
1334 extern int drm_agp_free_memory(DRM_AGP_MEM * handle);
1335 extern int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start);
1336 extern int drm_agp_unbind_memory(DRM_AGP_MEM * handle);
1337 extern void drm_agp_chipset_flush(struct drm_device *dev);
1338 
1339                                 /* Stub support (drm_stub.h) */
1340 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1341                                struct drm_file *file_priv);
1342 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1343                                 struct drm_file *file_priv);
1344 struct drm_master *drm_master_create(struct drm_minor *minor);
1345 extern struct drm_master *drm_master_get(struct drm_master *master);
1346 extern void drm_master_put(struct drm_master **master);
1347 extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
1348                        struct drm_driver *driver);
1349 extern void drm_put_dev(struct drm_device *dev);
1350 extern int drm_put_minor(struct drm_minor **minor);
1351 extern unsigned int drm_debug;
1352 
1353 extern struct class *drm_class;
1354 extern struct proc_dir_entry *drm_proc_root;
1355 extern struct dentry *drm_debugfs_root;
1356 
1357 extern struct idr drm_minors_idr;
1358 
1359 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1360 
1361                                 /* Proc support (drm_proc.h) */
1362 extern int drm_proc_init(struct drm_minor *minor, int minor_id,
1363                          struct proc_dir_entry *root);
1364 extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);
1365 
1366                                 /* Debugfs support */
1367 #if defined(CONFIG_DEBUG_FS)
1368 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1369                             struct dentry *root);
1370 extern int drm_debugfs_create_files(struct drm_info_list *files, int count,
1371                                     struct dentry *root, struct drm_minor *minor);
1372 extern int drm_debugfs_remove_files(struct drm_info_list *files, int count,
1373                                     struct drm_minor *minor);
1374 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1375 #endif
1376 
1377                                 /* Info file support */
1378 extern int drm_name_info(struct seq_file *m, void *data);
1379 extern int drm_vm_info(struct seq_file *m, void *data);
1380 extern int drm_queues_info(struct seq_file *m, void *data);
1381 extern int drm_bufs_info(struct seq_file *m, void *data);
1382 extern int drm_vblank_info(struct seq_file *m, void *data);
1383 extern int drm_clients_info(struct seq_file *m, void* data);
1384 extern int drm_gem_name_info(struct seq_file *m, void *data);
1385 extern int drm_gem_object_info(struct seq_file *m, void* data);
1386 
1387 #if DRM_DEBUG_CODE
1388 extern int drm_vma_info(struct seq_file *m, void *data);
1389 #endif
1390 
1391                                 /* Scatter Gather Support (drm_scatter.h) */
1392 extern void drm_sg_cleanup(struct drm_sg_mem * entry);
1393 extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1394                         struct drm_file *file_priv);
1395 extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
1396 extern int drm_sg_free(struct drm_device *dev, void *data,
1397                        struct drm_file *file_priv);
1398 
1399                                /* ATI PCIGART support (ati_pcigart.h) */
1400 extern int drm_ati_pcigart_init(struct drm_device *dev,
1401                                 struct drm_ati_pcigart_info * gart_info);
1402 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1403                                    struct drm_ati_pcigart_info * gart_info);
1404 
1405 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1406                                        size_t align);
1407 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1408 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1409 
1410                                /* sysfs support (drm_sysfs.c) */
1411 struct drm_sysfs_class;
1412 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1413 extern void drm_sysfs_destroy(void);
1414 extern int drm_sysfs_device_add(struct drm_minor *minor);
1415 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1416 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1417 extern char *drm_get_connector_status_name(enum drm_connector_status status);
1418 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1419 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1420 
1421 /* Graphics Execution Manager library functions (drm_gem.c) */
1422 int drm_gem_init(struct drm_device *dev);
1423 void drm_gem_destroy(struct drm_device *dev);
1424 void drm_gem_object_free(struct kref *kref);
1425 struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
1426                                             size_t size);
1427 void drm_gem_object_handle_free(struct kref *kref);
1428 void drm_gem_vm_open(struct vm_area_struct *vma);
1429 void drm_gem_vm_close(struct vm_area_struct *vma);
1430 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1431 
1432 static inline void
1433 drm_gem_object_reference(struct drm_gem_object *obj)
1434 {
1435         kref_get(&obj->refcount);
1436 }
1437 
1438 static inline void
1439 drm_gem_object_unreference(struct drm_gem_object *obj)
1440 {
1441         if (obj == NULL)
1442                 return;
1443 
1444         kref_put(&obj->refcount, drm_gem_object_free);
1445 }
1446 
1447 int drm_gem_handle_create(struct drm_file *file_priv,
1448                           struct drm_gem_object *obj,
1449                           u32 *handlep);
1450 
1451 static inline void
1452 drm_gem_object_handle_reference(struct drm_gem_object *obj)
1453 {
1454         drm_gem_object_reference(obj);
1455         kref_get(&obj->handlecount);
1456 }
1457 
1458 static inline void
1459 drm_gem_object_handle_unreference(struct drm_gem_object *obj)
1460 {
1461         if (obj == NULL)
1462                 return;
1463 
1464         /*
1465          * Must bump handle count first as this may be the last
1466          * ref, in which case the object would disappear before we
1467          * checked for a name
1468          */
1469         kref_put(&obj->handlecount, drm_gem_object_handle_free);
1470         drm_gem_object_unreference(obj);
1471 }
1472 
1473 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1474                                              struct drm_file *filp,
1475                                              u32 handle);
1476 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1477                         struct drm_file *file_priv);
1478 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1479                         struct drm_file *file_priv);
1480 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1481                        struct drm_file *file_priv);
1482 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1483 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1484 
1485 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1486 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1487 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1488 
1489 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1490                                                          unsigned int token)
1491 {
1492         struct drm_map_list *_entry;
1493         list_for_each_entry(_entry, &dev->maplist, head)
1494             if (_entry->user_token == token)
1495                 return _entry->map;
1496         return NULL;
1497 }
1498 
1499 static __inline__ int drm_device_is_agp(struct drm_device *dev)
1500 {
1501         if (dev->driver->device_is_agp != NULL) {
1502                 int err = (*dev->driver->device_is_agp) (dev);
1503 
1504                 if (err != 2) {
1505                         return err;
1506                 }
1507         }
1508 
1509         return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1510 }
1511 
1512 static __inline__ int drm_device_is_pcie(struct drm_device *dev)
1513 {
1514         return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
1515 }
1516 
1517 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1518 {
1519 }
1520 
1521 
1522 static __inline__ void *drm_calloc_large(size_t nmemb, size_t size)
1523 {
1524         if (size * nmemb <= PAGE_SIZE)
1525             return kcalloc(nmemb, size, GFP_KERNEL);
1526 
1527         if (size != 0 && nmemb > ULONG_MAX / size)
1528                 return NULL;
1529 
1530         return __vmalloc(size * nmemb,
1531                          GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, PAGE_KERNEL);
1532 }
1533 
1534 static __inline void drm_free_large(void *ptr)
1535 {
1536         if (!is_vmalloc_addr(ptr))
1537                 return kfree(ptr);
1538 
1539         vfree(ptr);
1540 }
1541 /*@}*/
1542 
1543 #endif                          /* __KERNEL__ */
1544 #endif
1545 

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