include/drm/drmP.h

   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
1327 /* Cache management (drm_cache.c) */
1328 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1329
1330                                 /* Locking IOCTL support (drm_lock.h) */
1331 extern int drm_lock(struct drm_device *dev, void *data,
1332                     struct drm_file *file_priv);
1333 extern int drm_unlock(struct drm_device *dev, void *data,
1334                       struct drm_file *file_priv);
1335 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1336 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1337 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1338
1339 /*
1340  * These are exported to drivers so that they can implement fencing using
1341  * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1342  */
1343
1344 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1345
1346                                 /* Buffer management support (drm_bufs.h) */
1347 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1348 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1349 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1350                       unsigned int size, enum drm_map_type type,
1351                       enum drm_map_flags flags, struct drm_local_map **map_ptr);
1352 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1353                             struct drm_file *file_priv);
1354 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1355 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1356 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1357                            struct drm_file *file_priv);
1358 extern int drm_addbufs(struct drm_device *dev, void *data,
1359                        struct drm_file *file_priv);
1360 extern int drm_infobufs(struct drm_device *dev, void *data,
1361                         struct drm_file *file_priv);
1362 extern int drm_markbufs(struct drm_device *dev, void *data,
1363                         struct drm_file *file_priv);
1364 extern int drm_freebufs(struct drm_device *dev, void *data,
1365                         struct drm_file *file_priv);
1366 extern int drm_mapbufs(struct drm_device *dev, void *data,
1367                        struct drm_file *file_priv);
1368 extern int drm_order(unsigned long size);
1369
1370                                 /* DMA support (drm_dma.h) */
1371 extern int drm_dma_setup(struct drm_device *dev);
1372 extern void drm_dma_takedown(struct drm_device *dev);
1373 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1374 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1375                                      struct drm_file *filp);
1376
1377                                 /* IRQ support (drm_irq.h) */
1378 extern int drm_control(struct drm_device *dev, void *data,
1379                        struct drm_file *file_priv);
1380 extern irqreturn_t drm_irq_handler(DRM_IRQ_ARGS);
1381 extern int drm_irq_install(struct drm_device *dev);
1382 extern int drm_irq_uninstall(struct drm_device *dev);
1383 extern void drm_driver_irq_preinstall(struct drm_device *dev);
1384 extern void drm_driver_irq_postinstall(struct drm_device *dev);
1385 extern void drm_driver_irq_uninstall(struct drm_device *dev);
1386
1387 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1388 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1389                            struct drm_file *filp);
1390 extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
1391 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1392 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1393                                      struct timeval *vblanktime);
1394 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1395 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1396 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1397 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1398 extern void drm_vblank_cleanup(struct drm_device *dev);
1399 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1400                                      struct timeval *tvblank, unsigned flags);
1401 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1402                                                  int crtc, int *max_error,
1403                                                  struct timeval *vblank_time,
1404                                                  unsigned flags,
1405                                                  struct drm_crtc *refcrtc);
1406 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);
1407
1408 extern bool
1409 drm_mode_parse_command_line_for_connector(const char *mode_option,
1410                                           struct drm_connector *connector,
1411                                           struct drm_cmdline_mode *mode);
1412
1413 extern struct drm_display_mode *
1414 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1415                                   struct drm_cmdline_mode *cmd);
1416
1417 /* Modesetting support */
1418 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1419 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1420 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1421                            struct drm_file *file_priv);
1422
1423                                 /* AGP/GART support (drm_agpsupport.h) */
1424 extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
1425 extern int drm_agp_acquire(struct drm_device *dev);
1426 extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
1427                                  struct drm_file *file_priv);
1428 extern int drm_agp_release(struct drm_device *dev);
1429 extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
1430                                  struct drm_file *file_priv);
1431 extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1432 extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
1433                                 struct drm_file *file_priv);
1434 extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
1435 extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
1436                         struct drm_file *file_priv);
1437 extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1438 extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
1439                          struct drm_file *file_priv);
1440 extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1441 extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
1442                         struct drm_file *file_priv);
1443 extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1444 extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
1445                           struct drm_file *file_priv);
1446 extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1447 extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
1448                         struct drm_file *file_priv);
1449
1450                                 /* Stub support (drm_stub.h) */
1451 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1452                                struct drm_file *file_priv);
1453 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1454                                 struct drm_file *file_priv);
1455 struct drm_master *drm_master_create(struct drm_minor *minor);
1456 extern struct drm_master *drm_master_get(struct drm_master *master);
1457 extern void drm_master_put(struct drm_master **master);
1458
1459 extern void drm_put_dev(struct drm_device *dev);
1460 extern int drm_put_minor(struct drm_minor **minor);
1461 extern unsigned int drm_debug;
1462
1463 extern unsigned int drm_vblank_offdelay;
1464 extern unsigned int drm_timestamp_precision;
1465
1466 extern struct class *drm_class;
1467 extern struct proc_dir_entry *drm_proc_root;
1468 extern struct dentry *drm_debugfs_root;
1469
1470 extern struct idr drm_minors_idr;
1471
1472 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1473
1474                                 /* Proc support (drm_proc.h) */
1475 extern int drm_proc_init(struct drm_minor *minor, int minor_id,
1476                          struct proc_dir_entry *root);
1477 extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);
1478
1479                                 /* Debugfs support */
1480 #if defined(CONFIG_DEBUG_FS)
1481 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1482                             struct dentry *root);
1483 extern int drm_debugfs_create_files(struct drm_info_list *files, int count,
1484                                     struct dentry *root, struct drm_minor *minor);
1485 extern int drm_debugfs_remove_files(struct drm_info_list *files, int count,
1486                                     struct drm_minor *minor);
1487 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1488 #endif
1489
1490                                 /* Info file support */
1491 extern int drm_name_info(struct seq_file *m, void *data);
1492 extern int drm_vm_info(struct seq_file *m, void *data);
1493 extern int drm_queues_info(struct seq_file *m, void *data);
1494 extern int drm_bufs_info(struct seq_file *m, void *data);
1495 extern int drm_vblank_info(struct seq_file *m, void *data);
1496 extern int drm_clients_info(struct seq_file *m, void* data);
1497 extern int drm_gem_name_info(struct seq_file *m, void *data);
1498
1499 #if DRM_DEBUG_CODE
1500 extern int drm_vma_info(struct seq_file *m, void *data);
1501 #endif
1502
1503                                 /* Scatter Gather Support (drm_scatter.h) */
1504 extern void drm_sg_cleanup(struct drm_sg_mem * entry);
1505 extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1506                         struct drm_file *file_priv);
1507 extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
1508 extern int drm_sg_free(struct drm_device *dev, void *data,
1509                        struct drm_file *file_priv);
1510
1511                                /* ATI PCIGART support (ati_pcigart.h) */
1512 extern int drm_ati_pcigart_init(struct drm_device *dev,
1513                                 struct drm_ati_pcigart_info * gart_info);
1514 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1515                                    struct drm_ati_pcigart_info * gart_info);
1516
1517 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1518                                        size_t align);
1519 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1520 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1521
1522                                /* sysfs support (drm_sysfs.c) */
1523 struct drm_sysfs_class;
1524 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1525 extern void drm_sysfs_destroy(void);
1526 extern int drm_sysfs_device_add(struct drm_minor *minor);
1527 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1528 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1529 extern char *drm_get_connector_status_name(enum drm_connector_status status);
1530 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1531 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1532
1533 /* Graphics Execution Manager library functions (drm_gem.c) */
1534 int drm_gem_init(struct drm_device *dev);
1535 void drm_gem_destroy(struct drm_device *dev);
1536 void drm_gem_object_release(struct drm_gem_object *obj);
1537 void drm_gem_object_free(struct kref *kref);
1538 struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
1539                                             size_t size);
1540 int drm_gem_object_init(struct drm_device *dev,
1541                         struct drm_gem_object *obj, size_t size);
1542 void drm_gem_object_handle_free(struct drm_gem_object *obj);
1543 void drm_gem_vm_open(struct vm_area_struct *vma);
1544 void drm_gem_vm_close(struct vm_area_struct *vma);
1545 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1546
1547 #include "drm_global.h"
1548
1549 static inline void
1550 drm_gem_object_reference(struct drm_gem_object *obj)
1551 {
1552         kref_get(&obj->refcount);
1553 }
1554
1555 static inline void
1556 drm_gem_object_unreference(struct drm_gem_object *obj)
1557 {
1558         if (obj != NULL)
1559                 kref_put(&obj->refcount, drm_gem_object_free);
1560 }
1561
1562 static inline void
1563 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1564 {
1565         if (obj != NULL) {
1566                 struct drm_device *dev = obj->dev;
1567                 mutex_lock(&dev->struct_mutex);
1568                 kref_put(&obj->refcount, drm_gem_object_free);
1569                 mutex_unlock(&dev->struct_mutex);
1570         }
1571 }
1572
1573 int drm_gem_handle_create(struct drm_file *file_priv,
1574                           struct drm_gem_object *obj,
1575                           u32 *handlep);
1576 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1577
1578 static inline void
1579 drm_gem_object_handle_reference(struct drm_gem_object *obj)
1580 {
1581         drm_gem_object_reference(obj);
1582         atomic_inc(&obj->handle_count);
1583 }
1584
1585 static inline void
1586 drm_gem_object_handle_unreference(struct drm_gem_object *obj)
1587 {
1588         if (obj == NULL)
1589                 return;
1590
1591         if (atomic_read(&obj->handle_count) == 0)
1592                 return;
1593         /*
1594          * Must bump handle count first as this may be the last
1595          * ref, in which case the object would disappear before we
1596          * checked for a name
1597          */
1598         if (atomic_dec_and_test(&obj->handle_count))
1599                 drm_gem_object_handle_free(obj);
1600         drm_gem_object_unreference(obj);
1601 }
1602
1603 static inline void
1604 drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
1605 {
1606         if (obj == NULL)
1607                 return;
1608
1609         if (atomic_read(&obj->handle_count) == 0)
1610                 return;
1611
1612         /*
1613         * Must bump handle count first as this may be the last
1614         * ref, in which case the object would disappear before we
1615         * checked for a name
1616         */
1617
1618         if (atomic_dec_and_test(&obj->handle_count))
1619                 drm_gem_object_handle_free(obj);
1620         drm_gem_object_unreference_unlocked(obj);
1621 }
1622
1623 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1624                                              struct drm_file *filp,
1625                                              u32 handle);
1626 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1627                         struct drm_file *file_priv);
1628 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1629                         struct drm_file *file_priv);
1630 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1631                        struct drm_file *file_priv);
1632 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1633 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1634
1635 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1636 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1637 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1638
1639 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1640                                                          unsigned int token)
1641 {
1642         struct drm_map_list *_entry;
1643         list_for_each_entry(_entry, &dev->maplist, head)
1644             if (_entry->user_token == token)
1645                 return _entry->map;
1646         return NULL;
1647 }
1648
1649 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1650 {
1651 }
1652
1653 #include "drm_mem_util.h"
1654
1655 extern int drm_fill_in_dev(struct drm_device *dev,
1656                            const struct pci_device_id *ent,
1657                            struct drm_driver *driver);
1658 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
1659 /*@}*/
1660
1661 /* PCI section */
1662 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1663 {
1664         if (dev->driver->device_is_agp != NULL) {
1665                 int err = (*dev->driver->device_is_agp) (dev);
1666
1667                 if (err != 2) {
1668                         return err;
1669                 }
1670         }
1671
1672         return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1673 }
1674
1675
1676 static __inline__ int drm_pci_device_is_pcie(struct drm_device *dev)
1677 {
1678         return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
1679 }
1680
1681
1682 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1683 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1684 extern int drm_get_pci_dev(struct pci_dev *pdev,
1685                            const struct pci_device_id *ent,
1686                            struct drm_driver *driver);
1687
1688
1689 /* platform section */
1690 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1691 extern void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device);
1692
1693 extern int drm_get_platform_dev(struct platform_device *pdev,
1694                                 struct drm_driver *driver);
1695
1696 #endif                          /* __KERNEL__ */
1697 #endif