linux/include/drm/drmP.h
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   1/**
   2 * \file drmP.h
   3 * Private header for Direct Rendering Manager
   4 *
   5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
   6 * \author Gareth Hughes <gareth@valinux.com>
   7 */
   8
   9/*
  10 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  12 * Copyright (c) 2009-2010, Code Aurora Forum.
  13 * All rights reserved.
  14 *
  15 * Permission is hereby granted, free of charge, to any person obtaining a
  16 * copy of this software and associated documentation files (the "Software"),
  17 * to deal in the Software without restriction, including without limitation
  18 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  19 * and/or sell copies of the Software, and to permit persons to whom the
  20 * Software is furnished to do so, subject to the following conditions:
  21 *
  22 * The above copyright notice and this permission notice (including the next
  23 * paragraph) shall be included in all copies or substantial portions of the
  24 * Software.
  25 *
  26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  27 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  29 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  30 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  31 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  32 * OTHER DEALINGS IN THE SOFTWARE.
  33 */
  34
  35#ifndef _DRM_P_H_
  36#define _DRM_P_H_
  37
  38#ifdef __KERNEL__
  39#ifdef __alpha__
  40/* add include of current.h so that "current" is defined
  41 * before static inline funcs in wait.h. Doing this so we
  42 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
  43#include <asm/current.h>
  44#endif                          /* __alpha__ */
  45#include <linux/kernel.h>
  46#include <linux/miscdevice.h>
  47#include <linux/fs.h>
  48#include <linux/proc_fs.h>
  49#include <linux/init.h>
  50#include <linux/file.h>
  51#include <linux/platform_device.h>
  52#include <linux/pci.h>
  53#include <linux/jiffies.h>
  54#include <linux/dma-mapping.h>
  55#include <linux/mm.h>
  56#include <linux/cdev.h>
  57#include <linux/mutex.h>
  58#include <linux/slab.h>
  59#if defined(__alpha__) || defined(__powerpc__)
  60#include <asm/pgtable.h>        /* For pte_wrprotect */
  61#endif
  62#include <asm/io.h>
  63#include <asm/mman.h>
  64#include <asm/uaccess.h>
  65#ifdef CONFIG_MTRR
  66#include <asm/mtrr.h>
  67#endif
  68#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
  69#include <linux/types.h>
  70#include <linux/agp_backend.h>
  71#endif
  72#include <linux/workqueue.h>
  73#include <linux/poll.h>
  74#include <asm/pgalloc.h>
  75#include "drm.h"
  76
  77#include <linux/idr.h>
  78
  79#define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
  80#define __OS_HAS_MTRR (defined(CONFIG_MTRR))
  81
  82struct module;
  83
  84struct drm_file;
  85struct drm_device;
  86
  87#include "drm_os_linux.h"
  88#include "drm_hashtab.h"
  89#include "drm_mm.h"
  90
  91#define DRM_UT_CORE             0x01
  92#define DRM_UT_DRIVER           0x02
  93#define DRM_UT_KMS              0x04
  94#define DRM_UT_PRIME            0x08
  95/*
  96 * Three debug levels are defined.
  97 * drm_core, drm_driver, drm_kms
  98 * drm_core level can be used in the generic drm code. For example:
  99 *      drm_ioctl, drm_mm, drm_memory
 100 * The macro definition of DRM_DEBUG is used.
 101 *      DRM_DEBUG(fmt, args...)
 102 *      The debug info by using the DRM_DEBUG can be obtained by adding
 103 *      the boot option of "drm.debug=1".
 104 *
 105 * drm_driver level can be used in the specific drm driver. It is used
 106 * to add the debug info related with the drm driver. For example:
 107 * i915_drv, i915_dma, i915_gem, radeon_drv,
 108 *      The macro definition of DRM_DEBUG_DRIVER can be used.
 109 *      DRM_DEBUG_DRIVER(fmt, args...)
 110 *      The debug info by using the DRM_DEBUG_DRIVER can be obtained by
 111 *      adding the boot option of "drm.debug=0x02"
 112 *
 113 * drm_kms level can be used in the KMS code related with specific drm driver.
 114 * It is used to add the debug info related with KMS mode. For example:
 115 * the connector/crtc ,
 116 *      The macro definition of DRM_DEBUG_KMS can be used.
 117 *      DRM_DEBUG_KMS(fmt, args...)
 118 *      The debug info by using the DRM_DEBUG_KMS can be obtained by
 119 *      adding the boot option of "drm.debug=0x04"
 120 *
 121 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
 122 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
 123 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
 124 * using the DRM_DEBUG_KMS and DRM_DEBUG.
 125 */
 126
 127extern __printf(4, 5)
 128void drm_ut_debug_printk(unsigned int request_level,
 129                         const char *prefix,
 130                         const char *function_name,
 131                         const char *format, ...);
 132extern __printf(2, 3)
 133int drm_err(const char *func, const char *format, ...);
 134
 135/***********************************************************************/
 136/** \name DRM template customization defaults */
 137/*@{*/
 138
 139/* driver capabilities and requirements mask */
 140#define DRIVER_USE_AGP     0x1
 141#define DRIVER_REQUIRE_AGP 0x2
 142#define DRIVER_USE_MTRR    0x4
 143#define DRIVER_PCI_DMA     0x8
 144#define DRIVER_SG          0x10
 145#define DRIVER_HAVE_DMA    0x20
 146#define DRIVER_HAVE_IRQ    0x40
 147#define DRIVER_IRQ_SHARED  0x80
 148#define DRIVER_IRQ_VBL     0x100
 149#define DRIVER_DMA_QUEUE   0x200
 150#define DRIVER_FB_DMA      0x400
 151#define DRIVER_IRQ_VBL2    0x800
 152#define DRIVER_GEM         0x1000
 153#define DRIVER_MODESET     0x2000
 154#define DRIVER_PRIME       0x4000
 155
 156#define DRIVER_BUS_PCI 0x1
 157#define DRIVER_BUS_PLATFORM 0x2
 158#define DRIVER_BUS_USB 0x3
 159
 160/***********************************************************************/
 161/** \name Begin the DRM... */
 162/*@{*/
 163
 164#define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
 165                                     also include looping detection. */
 166
 167#define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
 168#define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
 169#define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
 170#define DRM_LOOPING_LIMIT     5000000
 171#define DRM_TIME_SLICE        (HZ/20)  /**< Time slice for GLXContexts */
 172#define DRM_LOCK_SLICE        1 /**< Time slice for lock, in jiffies */
 173
 174#define DRM_FLAG_DEBUG    0x01
 175
 176#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
 177#define DRM_MAP_HASH_OFFSET 0x10000000
 178
 179/*@}*/
 180
 181/***********************************************************************/
 182/** \name Macros to make printk easier */
 183/*@{*/
 184
 185/**
 186 * Error output.
 187 *
 188 * \param fmt printf() like format string.
 189 * \param arg arguments
 190 */
 191#define DRM_ERROR(fmt, ...)                             \
 192        drm_err(__func__, fmt, ##__VA_ARGS__)
 193
 194#define DRM_INFO(fmt, ...)                              \
 195        printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
 196
 197/**
 198 * Debug output.
 199 *
 200 * \param fmt printf() like format string.
 201 * \param arg arguments
 202 */
 203#if DRM_DEBUG_CODE
 204#define DRM_DEBUG(fmt, args...)                                         \
 205        do {                                                            \
 206                drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME,              \
 207                                        __func__, fmt, ##args);         \
 208        } while (0)
 209
 210#define DRM_DEBUG_DRIVER(fmt, args...)                                  \
 211        do {                                                            \
 212                drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME,            \
 213                                        __func__, fmt, ##args);         \
 214        } while (0)
 215#define DRM_DEBUG_KMS(fmt, args...)                             \
 216        do {                                                            \
 217                drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME,               \
 218                                         __func__, fmt, ##args);        \
 219        } while (0)
 220#define DRM_DEBUG_PRIME(fmt, args...)                                   \
 221        do {                                                            \
 222                drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME,             \
 223                                        __func__, fmt, ##args);         \
 224        } while (0)
 225#define DRM_LOG(fmt, args...)                                           \
 226        do {                                                            \
 227                drm_ut_debug_printk(DRM_UT_CORE, NULL,                  \
 228                                        NULL, fmt, ##args);             \
 229        } while (0)
 230#define DRM_LOG_KMS(fmt, args...)                                       \
 231        do {                                                            \
 232                drm_ut_debug_printk(DRM_UT_KMS, NULL,                   \
 233                                        NULL, fmt, ##args);             \
 234        } while (0)
 235#define DRM_LOG_MODE(fmt, args...)                                      \
 236        do {                                                            \
 237                drm_ut_debug_printk(DRM_UT_MODE, NULL,                  \
 238                                        NULL, fmt, ##args);             \
 239        } while (0)
 240#define DRM_LOG_DRIVER(fmt, args...)                                    \
 241        do {                                                            \
 242                drm_ut_debug_printk(DRM_UT_DRIVER, NULL,                \
 243                                        NULL, fmt, ##args);             \
 244        } while (0)
 245#else
 246#define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
 247#define DRM_DEBUG_KMS(fmt, args...)     do { } while (0)
 248#define DRM_DEBUG_PRIME(fmt, args...)   do { } while (0)
 249#define DRM_DEBUG(fmt, arg...)           do { } while (0)
 250#define DRM_LOG(fmt, arg...)            do { } while (0)
 251#define DRM_LOG_KMS(fmt, args...) do { } while (0)
 252#define DRM_LOG_MODE(fmt, arg...) do { } while (0)
 253#define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
 254
 255#endif
 256
 257/*@}*/
 258
 259/***********************************************************************/
 260/** \name Internal types and structures */
 261/*@{*/
 262
 263#define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
 264
 265#define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
 266#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
 267
 268#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 269
 270/**
 271 * Test that the hardware lock is held by the caller, returning otherwise.
 272 *
 273 * \param dev DRM device.
 274 * \param filp file pointer of the caller.
 275 */
 276#define LOCK_TEST_WITH_RETURN( dev, _file_priv )                                \
 277do {                                                                            \
 278        if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||       \
 279            _file_priv->master->lock.file_priv != _file_priv)   {               \
 280                DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
 281                           __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
 282                           _file_priv->master->lock.file_priv, _file_priv);     \
 283                return -EINVAL;                                                 \
 284        }                                                                       \
 285} while (0)
 286
 287/**
 288 * Ioctl function type.
 289 *
 290 * \param inode device inode.
 291 * \param file_priv DRM file private pointer.
 292 * \param cmd command.
 293 * \param arg argument.
 294 */
 295typedef int drm_ioctl_t(struct drm_device *dev, void *data,
 296                        struct drm_file *file_priv);
 297
 298typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
 299                               unsigned long arg);
 300
 301#define DRM_IOCTL_NR(n)                _IOC_NR(n)
 302#define DRM_MAJOR       226
 303
 304#define DRM_AUTH        0x1
 305#define DRM_MASTER      0x2
 306#define DRM_ROOT_ONLY   0x4
 307#define DRM_CONTROL_ALLOW 0x8
 308#define DRM_UNLOCKED    0x10
 309
 310struct drm_ioctl_desc {
 311        unsigned int cmd;
 312        int flags;
 313        drm_ioctl_t *func;
 314        unsigned int cmd_drv;
 315};
 316
 317/**
 318 * Creates a driver or general drm_ioctl_desc array entry for the given
 319 * ioctl, for use by drm_ioctl().
 320 */
 321
 322#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)                 \
 323        [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl}
 324
 325struct drm_magic_entry {
 326        struct list_head head;
 327        struct drm_hash_item hash_item;
 328        struct drm_file *priv;
 329};
 330
 331struct drm_vma_entry {
 332        struct list_head head;
 333        struct vm_area_struct *vma;
 334        pid_t pid;
 335};
 336
 337/**
 338 * DMA buffer.
 339 */
 340struct drm_buf {
 341        int idx;                       /**< Index into master buflist */
 342        int total;                     /**< Buffer size */
 343        int order;                     /**< log-base-2(total) */
 344        int used;                      /**< Amount of buffer in use (for DMA) */
 345        unsigned long offset;          /**< Byte offset (used internally) */
 346        void *address;                 /**< Address of buffer */
 347        unsigned long bus_address;     /**< Bus address of buffer */
 348        struct drm_buf *next;          /**< Kernel-only: used for free list */
 349        __volatile__ int waiting;      /**< On kernel DMA queue */
 350        __volatile__ int pending;      /**< On hardware DMA queue */
 351        struct drm_file *file_priv;    /**< Private of holding file descr */
 352        int context;                   /**< Kernel queue for this buffer */
 353        int while_locked;              /**< Dispatch this buffer while locked */
 354        enum {
 355                DRM_LIST_NONE = 0,
 356                DRM_LIST_FREE = 1,
 357                DRM_LIST_WAIT = 2,
 358                DRM_LIST_PEND = 3,
 359                DRM_LIST_PRIO = 4,
 360                DRM_LIST_RECLAIM = 5
 361        } list;                        /**< Which list we're on */
 362
 363        int dev_priv_size;               /**< Size of buffer private storage */
 364        void *dev_private;               /**< Per-buffer private storage */
 365};
 366
 367/** bufs is one longer than it has to be */
 368struct drm_waitlist {
 369        int count;                      /**< Number of possible buffers */
 370        struct drm_buf **bufs;          /**< List of pointers to buffers */
 371        struct drm_buf **rp;                    /**< Read pointer */
 372        struct drm_buf **wp;                    /**< Write pointer */
 373        struct drm_buf **end;           /**< End pointer */
 374        spinlock_t read_lock;
 375        spinlock_t write_lock;
 376};
 377
 378struct drm_freelist {
 379        int initialized;               /**< Freelist in use */
 380        atomic_t count;                /**< Number of free buffers */
 381        struct drm_buf *next;          /**< End pointer */
 382
 383        wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
 384        int low_mark;                  /**< Low water mark */
 385        int high_mark;                 /**< High water mark */
 386        atomic_t wfh;                  /**< If waiting for high mark */
 387        spinlock_t lock;
 388};
 389
 390typedef struct drm_dma_handle {
 391        dma_addr_t busaddr;
 392        void *vaddr;
 393        size_t size;
 394} drm_dma_handle_t;
 395
 396/**
 397 * Buffer entry.  There is one of this for each buffer size order.
 398 */
 399struct drm_buf_entry {
 400        int buf_size;                   /**< size */
 401        int buf_count;                  /**< number of buffers */
 402        struct drm_buf *buflist;                /**< buffer list */
 403        int seg_count;
 404        int page_order;
 405        struct drm_dma_handle **seglist;
 406
 407        struct drm_freelist freelist;
 408};
 409
 410/* Event queued up for userspace to read */
 411struct drm_pending_event {
 412        struct drm_event *event;
 413        struct list_head link;
 414        struct drm_file *file_priv;
 415        pid_t pid; /* pid of requester, no guarantee it's valid by the time
 416                      we deliver the event, for tracing only */
 417        void (*destroy)(struct drm_pending_event *event);
 418};
 419
 420/* initial implementaton using a linked list - todo hashtab */
 421struct drm_prime_file_private {
 422        struct list_head head;
 423        struct mutex lock;
 424};
 425
 426/** File private data */
 427struct drm_file {
 428        int authenticated;
 429        pid_t pid;
 430        uid_t uid;
 431        drm_magic_t magic;
 432        unsigned long ioctl_count;
 433        struct list_head lhead;
 434        struct drm_minor *minor;
 435        unsigned long lock_count;
 436
 437        /** Mapping of mm object handles to object pointers. */
 438        struct idr object_idr;
 439        /** Lock for synchronization of access to object_idr. */
 440        spinlock_t table_lock;
 441
 442        struct file *filp;
 443        void *driver_priv;
 444
 445        int is_master; /* this file private is a master for a minor */
 446        struct drm_master *master; /* master this node is currently associated with
 447                                      N.B. not always minor->master */
 448        struct list_head fbs;
 449
 450        wait_queue_head_t event_wait;
 451        struct list_head event_list;
 452        int event_space;
 453
 454        struct drm_prime_file_private prime;
 455};
 456
 457/** Wait queue */
 458struct drm_queue {
 459        atomic_t use_count;             /**< Outstanding uses (+1) */
 460        atomic_t finalization;          /**< Finalization in progress */
 461        atomic_t block_count;           /**< Count of processes waiting */
 462        atomic_t block_read;            /**< Queue blocked for reads */
 463        wait_queue_head_t read_queue;   /**< Processes waiting on block_read */
 464        atomic_t block_write;           /**< Queue blocked for writes */
 465        wait_queue_head_t write_queue;  /**< Processes waiting on block_write */
 466        atomic_t total_queued;          /**< Total queued statistic */
 467        atomic_t total_flushed;         /**< Total flushes statistic */
 468        atomic_t total_locks;           /**< Total locks statistics */
 469        enum drm_ctx_flags flags;       /**< Context preserving and 2D-only */
 470        struct drm_waitlist waitlist;   /**< Pending buffers */
 471        wait_queue_head_t flush_queue;  /**< Processes waiting until flush */
 472};
 473
 474/**
 475 * Lock data.
 476 */
 477struct drm_lock_data {
 478        struct drm_hw_lock *hw_lock;    /**< Hardware lock */
 479        /** Private of lock holder's file (NULL=kernel) */
 480        struct drm_file *file_priv;
 481        wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
 482        unsigned long lock_time;        /**< Time of last lock in jiffies */
 483        spinlock_t spinlock;
 484        uint32_t kernel_waiters;
 485        uint32_t user_waiters;
 486        int idle_has_lock;
 487};
 488
 489/**
 490 * DMA data.
 491 */
 492struct drm_device_dma {
 493
 494        struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   /**< buffers, grouped by their size order */
 495        int buf_count;                  /**< total number of buffers */
 496        struct drm_buf **buflist;               /**< Vector of pointers into drm_device_dma::bufs */
 497        int seg_count;
 498        int page_count;                 /**< number of pages */
 499        unsigned long *pagelist;        /**< page list */
 500        unsigned long byte_count;
 501        enum {
 502                _DRM_DMA_USE_AGP = 0x01,
 503                _DRM_DMA_USE_SG = 0x02,
 504                _DRM_DMA_USE_FB = 0x04,
 505                _DRM_DMA_USE_PCI_RO = 0x08
 506        } flags;
 507
 508};
 509
 510/**
 511 * AGP memory entry.  Stored as a doubly linked list.
 512 */
 513struct drm_agp_mem {
 514        unsigned long handle;           /**< handle */
 515        DRM_AGP_MEM *memory;
 516        unsigned long bound;            /**< address */
 517        int pages;
 518        struct list_head head;
 519};
 520
 521/**
 522 * AGP data.
 523 *
 524 * \sa drm_agp_init() and drm_device::agp.
 525 */
 526struct drm_agp_head {
 527        DRM_AGP_KERN agp_info;          /**< AGP device information */
 528        struct list_head memory;
 529        unsigned long mode;             /**< AGP mode */
 530        struct agp_bridge_data *bridge;
 531        int enabled;                    /**< whether the AGP bus as been enabled */
 532        int acquired;                   /**< whether the AGP device has been acquired */
 533        unsigned long base;
 534        int agp_mtrr;
 535        int cant_use_aperture;
 536        unsigned long page_mask;
 537};
 538
 539/**
 540 * Scatter-gather memory.
 541 */
 542struct drm_sg_mem {
 543        unsigned long handle;
 544        void *virtual;
 545        int pages;
 546        struct page **pagelist;
 547        dma_addr_t *busaddr;
 548};
 549
 550struct drm_sigdata {
 551        int context;
 552        struct drm_hw_lock *lock;
 553};
 554
 555
 556/**
 557 * Kernel side of a mapping
 558 */
 559struct drm_local_map {
 560        resource_size_t offset;  /**< Requested physical address (0 for SAREA)*/
 561        unsigned long size;      /**< Requested physical size (bytes) */
 562        enum drm_map_type type;  /**< Type of memory to map */
 563        enum drm_map_flags flags;        /**< Flags */
 564        void *handle;            /**< User-space: "Handle" to pass to mmap() */
 565                                 /**< Kernel-space: kernel-virtual address */
 566        int mtrr;                /**< MTRR slot used */
 567};
 568
 569typedef struct drm_local_map drm_local_map_t;
 570
 571/**
 572 * Mappings list
 573 */
 574struct drm_map_list {
 575        struct list_head head;          /**< list head */
 576        struct drm_hash_item hash;
 577        struct drm_local_map *map;      /**< mapping */
 578        uint64_t user_token;
 579        struct drm_master *master;
 580        struct drm_mm_node *file_offset_node;   /**< fake offset */
 581};
 582
 583/**
 584 * Context handle list
 585 */
 586struct drm_ctx_list {
 587        struct list_head head;          /**< list head */
 588        drm_context_t handle;           /**< context handle */
 589        struct drm_file *tag;           /**< associated fd private data */
 590};
 591
 592/* location of GART table */
 593#define DRM_ATI_GART_MAIN 1
 594#define DRM_ATI_GART_FB   2
 595
 596#define DRM_ATI_GART_PCI 1
 597#define DRM_ATI_GART_PCIE 2
 598#define DRM_ATI_GART_IGP 3
 599
 600struct drm_ati_pcigart_info {
 601        int gart_table_location;
 602        int gart_reg_if;
 603        void *addr;
 604        dma_addr_t bus_addr;
 605        dma_addr_t table_mask;
 606        struct drm_dma_handle *table_handle;
 607        struct drm_local_map mapping;
 608        int table_size;
 609};
 610
 611/**
 612 * GEM specific mm private for tracking GEM objects
 613 */
 614struct drm_gem_mm {
 615        struct drm_mm offset_manager;   /**< Offset mgmt for buffer objects */
 616        struct drm_open_hash offset_hash; /**< User token hash table for maps */
 617};
 618
 619/**
 620 * This structure defines the drm_mm memory object, which will be used by the
 621 * DRM for its buffer objects.
 622 */
 623struct drm_gem_object {
 624        /** Reference count of this object */
 625        struct kref refcount;
 626
 627        /** Handle count of this object. Each handle also holds a reference */
 628        atomic_t handle_count; /* number of handles on this object */
 629
 630        /** Related drm device */
 631        struct drm_device *dev;
 632
 633        /** File representing the shmem storage */
 634        struct file *filp;
 635
 636        /* Mapping info for this object */
 637        struct drm_map_list map_list;
 638
 639        /**
 640         * Size of the object, in bytes.  Immutable over the object's
 641         * lifetime.
 642         */
 643        size_t size;
 644
 645        /**
 646         * Global name for this object, starts at 1. 0 means unnamed.
 647         * Access is covered by the object_name_lock in the related drm_device
 648         */
 649        int name;
 650
 651        /**
 652         * Memory domains. These monitor which caches contain read/write data
 653         * related to the object. When transitioning from one set of domains
 654         * to another, the driver is called to ensure that caches are suitably
 655         * flushed and invalidated
 656         */
 657        uint32_t read_domains;
 658        uint32_t write_domain;
 659
 660        /**
 661         * While validating an exec operation, the
 662         * new read/write domain values are computed here.
 663         * They will be transferred to the above values
 664         * at the point that any cache flushing occurs
 665         */
 666        uint32_t pending_read_domains;
 667        uint32_t pending_write_domain;
 668
 669        void *driver_private;
 670
 671        /* dma buf exported from this GEM object */
 672        struct dma_buf *export_dma_buf;
 673
 674        /* dma buf attachment backing this object */
 675        struct dma_buf_attachment *import_attach;
 676};
 677
 678#include "drm_crtc.h"
 679
 680/* per-master structure */
 681struct drm_master {
 682
 683        struct kref refcount; /* refcount for this master */
 684
 685        struct list_head head; /**< each minor contains a list of masters */
 686        struct drm_minor *minor; /**< link back to minor we are a master for */
 687
 688        char *unique;                   /**< Unique identifier: e.g., busid */
 689        int unique_len;                 /**< Length of unique field */
 690        int unique_size;                /**< amount allocated */
 691
 692        int blocked;                    /**< Blocked due to VC switch? */
 693
 694        /** \name Authentication */
 695        /*@{ */
 696        struct drm_open_hash magiclist;
 697        struct list_head magicfree;
 698        /*@} */
 699
 700        struct drm_lock_data lock;      /**< Information on hardware lock */
 701
 702        void *driver_priv; /**< Private structure for driver to use */
 703};
 704
 705/* Size of ringbuffer for vblank timestamps. Just double-buffer
 706 * in initial implementation.
 707 */
 708#define DRM_VBLANKTIME_RBSIZE 2
 709
 710/* Flags and return codes for get_vblank_timestamp() driver function. */
 711#define DRM_CALLED_FROM_VBLIRQ 1
 712#define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
 713#define DRM_VBLANKTIME_INVBL             (1 << 1)
 714
 715/* get_scanout_position() return flags */
 716#define DRM_SCANOUTPOS_VALID        (1 << 0)
 717#define DRM_SCANOUTPOS_INVBL        (1 << 1)
 718#define DRM_SCANOUTPOS_ACCURATE     (1 << 2)
 719
 720struct drm_bus {
 721        int bus_type;
 722        int (*get_irq)(struct drm_device *dev);
 723        const char *(*get_name)(struct drm_device *dev);
 724        int (*set_busid)(struct drm_device *dev, struct drm_master *master);
 725        int (*set_unique)(struct drm_device *dev, struct drm_master *master,
 726                          struct drm_unique *unique);
 727        int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
 728        /* hooks that are for PCI */
 729        int (*agp_init)(struct drm_device *dev);
 730
 731};
 732
 733/**
 734 * DRM driver structure. This structure represent the common code for
 735 * a family of cards. There will one drm_device for each card present
 736 * in this family
 737 */
 738struct drm_driver {
 739        int (*load) (struct drm_device *, unsigned long flags);
 740        int (*firstopen) (struct drm_device *);
 741        int (*open) (struct drm_device *, struct drm_file *);
 742        void (*preclose) (struct drm_device *, struct drm_file *file_priv);
 743        void (*postclose) (struct drm_device *, struct drm_file *);
 744        void (*lastclose) (struct drm_device *);
 745        int (*unload) (struct drm_device *);
 746        int (*suspend) (struct drm_device *, pm_message_t state);
 747        int (*resume) (struct drm_device *);
 748        int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
 749        int (*dma_quiescent) (struct drm_device *);
 750        int (*context_dtor) (struct drm_device *dev, int context);
 751
 752        /**
 753         * get_vblank_counter - get raw hardware vblank counter
 754         * @dev: DRM device
 755         * @crtc: counter to fetch
 756         *
 757         * Driver callback for fetching a raw hardware vblank counter for @crtc.
 758         * If a device doesn't have a hardware counter, the driver can simply
 759         * return the value of drm_vblank_count. The DRM core will account for
 760         * missed vblank events while interrupts where disabled based on system
 761         * timestamps.
 762         *
 763         * Wraparound handling and loss of events due to modesetting is dealt
 764         * with in the DRM core code.
 765         *
 766         * RETURNS
 767         * Raw vblank counter value.
 768         */
 769        u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
 770
 771        /**
 772         * enable_vblank - enable vblank interrupt events
 773         * @dev: DRM device
 774         * @crtc: which irq to enable
 775         *
 776         * Enable vblank interrupts for @crtc.  If the device doesn't have
 777         * a hardware vblank counter, this routine should be a no-op, since
 778         * interrupts will have to stay on to keep the count accurate.
 779         *
 780         * RETURNS
 781         * Zero on success, appropriate errno if the given @crtc's vblank
 782         * interrupt cannot be enabled.
 783         */
 784        int (*enable_vblank) (struct drm_device *dev, int crtc);
 785
 786        /**
 787         * disable_vblank - disable vblank interrupt events
 788         * @dev: DRM device
 789         * @crtc: which irq to enable
 790         *
 791         * Disable vblank interrupts for @crtc.  If the device doesn't have
 792         * a hardware vblank counter, this routine should be a no-op, since
 793         * interrupts will have to stay on to keep the count accurate.
 794         */
 795        void (*disable_vblank) (struct drm_device *dev, int crtc);
 796
 797        /**
 798         * Called by \c drm_device_is_agp.  Typically used to determine if a
 799         * card is really attached to AGP or not.
 800         *
 801         * \param dev  DRM device handle
 802         *
 803         * \returns
 804         * One of three values is returned depending on whether or not the
 805         * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
 806         * (return of 1), or may or may not be AGP (return of 2).
 807         */
 808        int (*device_is_agp) (struct drm_device *dev);
 809
 810        /**
 811         * Called by vblank timestamping code.
 812         *
 813         * Return the current display scanout position from a crtc.
 814         *
 815         * \param dev  DRM device.
 816         * \param crtc Id of the crtc to query.
 817         * \param *vpos Target location for current vertical scanout position.
 818         * \param *hpos Target location for current horizontal scanout position.
 819         *
 820         * Returns vpos as a positive number while in active scanout area.
 821         * Returns vpos as a negative number inside vblank, counting the number
 822         * of scanlines to go until end of vblank, e.g., -1 means "one scanline
 823         * until start of active scanout / end of vblank."
 824         *
 825         * \return Flags, or'ed together as follows:
 826         *
 827         * DRM_SCANOUTPOS_VALID = Query successful.
 828         * DRM_SCANOUTPOS_INVBL = Inside vblank.
 829         * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
 830         * this flag means that returned position may be offset by a constant
 831         * but unknown small number of scanlines wrt. real scanout position.
 832         *
 833         */
 834        int (*get_scanout_position) (struct drm_device *dev, int crtc,
 835                                     int *vpos, int *hpos);
 836
 837        /**
 838         * Called by \c drm_get_last_vbltimestamp. Should return a precise
 839         * timestamp when the most recent VBLANK interval ended or will end.
 840         *
 841         * Specifically, the timestamp in @vblank_time should correspond as
 842         * closely as possible to the time when the first video scanline of
 843         * the video frame after the end of VBLANK will start scanning out,
 844         * the time immediately after end of the VBLANK interval. If the
 845         * @crtc is currently inside VBLANK, this will be a time in the future.
 846         * If the @crtc is currently scanning out a frame, this will be the
 847         * past start time of the current scanout. This is meant to adhere
 848         * to the OpenML OML_sync_control extension specification.
 849         *
 850         * \param dev dev DRM device handle.
 851         * \param crtc crtc for which timestamp should be returned.
 852         * \param *max_error Maximum allowable timestamp error in nanoseconds.
 853         *                   Implementation should strive to provide timestamp
 854         *                   with an error of at most *max_error nanoseconds.
 855         *                   Returns true upper bound on error for timestamp.
 856         * \param *vblank_time Target location for returned vblank timestamp.
 857         * \param flags 0 = Defaults, no special treatment needed.
 858         * \param       DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
 859         *              irq handler. Some drivers need to apply some workarounds
 860         *              for gpu-specific vblank irq quirks if flag is set.
 861         *
 862         * \returns
 863         * Zero if timestamping isn't supported in current display mode or a
 864         * negative number on failure. A positive status code on success,
 865         * which describes how the vblank_time timestamp was computed.
 866         */
 867        int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
 868                                     int *max_error,
 869                                     struct timeval *vblank_time,
 870                                     unsigned flags);
 871
 872        /* these have to be filled in */
 873
 874        irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
 875        void (*irq_preinstall) (struct drm_device *dev);
 876        int (*irq_postinstall) (struct drm_device *dev);
 877        void (*irq_uninstall) (struct drm_device *dev);
 878        void (*set_version) (struct drm_device *dev,
 879                             struct drm_set_version *sv);
 880
 881        /* Master routines */
 882        int (*master_create)(struct drm_device *dev, struct drm_master *master);
 883        void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
 884        /**
 885         * master_set is called whenever the minor master is set.
 886         * master_drop is called whenever the minor master is dropped.
 887         */
 888
 889        int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
 890                          bool from_open);
 891        void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
 892                            bool from_release);
 893
 894        int (*debugfs_init)(struct drm_minor *minor);
 895        void (*debugfs_cleanup)(struct drm_minor *minor);
 896
 897        /**
 898         * Driver-specific constructor for drm_gem_objects, to set up
 899         * obj->driver_private.
 900         *
 901         * Returns 0 on success.
 902         */
 903        int (*gem_init_object) (struct drm_gem_object *obj);
 904        void (*gem_free_object) (struct drm_gem_object *obj);
 905        int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
 906        void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
 907
 908        /* prime: */
 909        /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
 910        int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
 911                                uint32_t handle, uint32_t flags, int *prime_fd);
 912        /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
 913        int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
 914                                int prime_fd, uint32_t *handle);
 915        /* export GEM -> dmabuf */
 916        struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
 917                                struct drm_gem_object *obj, int flags);
 918        /* import dmabuf -> GEM */
 919        struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
 920                                struct dma_buf *dma_buf);
 921
 922        /* vga arb irq handler */
 923        void (*vgaarb_irq)(struct drm_device *dev, bool state);
 924
 925        /* dumb alloc support */
 926        int (*dumb_create)(struct drm_file *file_priv,
 927                           struct drm_device *dev,
 928                           struct drm_mode_create_dumb *args);
 929        int (*dumb_map_offset)(struct drm_file *file_priv,
 930                               struct drm_device *dev, uint32_t handle,
 931                               uint64_t *offset);
 932        int (*dumb_destroy)(struct drm_file *file_priv,
 933                            struct drm_device *dev,
 934                            uint32_t handle);
 935
 936        /* Driver private ops for this object */
 937        const struct vm_operations_struct *gem_vm_ops;
 938
 939        int major;
 940        int minor;
 941        int patchlevel;
 942        char *name;
 943        char *desc;
 944        char *date;
 945
 946        u32 driver_features;
 947        int dev_priv_size;
 948        struct drm_ioctl_desc *ioctls;
 949        int num_ioctls;
 950        const struct file_operations *fops;
 951        union {
 952                struct pci_driver *pci;
 953                struct platform_device *platform_device;
 954                struct usb_driver *usb;
 955        } kdriver;
 956        struct drm_bus *bus;
 957
 958        /* List of devices hanging off this driver */
 959        struct list_head device_list;
 960};
 961
 962#define DRM_MINOR_UNASSIGNED 0
 963#define DRM_MINOR_LEGACY 1
 964#define DRM_MINOR_CONTROL 2
 965#define DRM_MINOR_RENDER 3
 966
 967
 968/**
 969 * debugfs node list. This structure represents a debugfs file to
 970 * be created by the drm core
 971 */
 972struct drm_debugfs_list {
 973        const char *name; /** file name */
 974        int (*show)(struct seq_file*, void*); /** show callback */
 975        u32 driver_features; /**< Required driver features for this entry */
 976};
 977
 978/**
 979 * debugfs node structure. This structure represents a debugfs file.
 980 */
 981struct drm_debugfs_node {
 982        struct list_head list;
 983        struct drm_minor *minor;
 984        struct drm_debugfs_list *debugfs_ent;
 985        struct dentry *dent;
 986};
 987
 988/**
 989 * Info file list entry. This structure represents a debugfs or proc file to
 990 * be created by the drm core
 991 */
 992struct drm_info_list {
 993        const char *name; /** file name */
 994        int (*show)(struct seq_file*, void*); /** show callback */
 995        u32 driver_features; /**< Required driver features for this entry */
 996        void *data;
 997};
 998
 999/**
1000 * debugfs node structure. This structure represents a debugfs file.
1001 */
1002struct drm_info_node {
1003        struct list_head list;
1004        struct drm_minor *minor;
1005        struct drm_info_list *info_ent;
1006        struct dentry *dent;
1007};
1008
1009/**
1010 * DRM minor structure. This structure represents a drm minor number.
1011 */
1012struct drm_minor {
1013        int index;                      /**< Minor device number */
1014        int type;                       /**< Control or render */
1015        dev_t device;                   /**< Device number for mknod */
1016        struct device kdev;             /**< Linux device */
1017        struct drm_device *dev;
1018
1019        struct proc_dir_entry *proc_root;  /**< proc directory entry */
1020        struct drm_info_node proc_nodes;
1021        struct dentry *debugfs_root;
1022
1023        struct list_head debugfs_list;
1024        struct mutex debugfs_lock; /* Protects debugfs_list. */
1025
1026        struct drm_master *master; /* currently active master for this node */
1027        struct list_head master_list;
1028        struct drm_mode_group mode_group;
1029};
1030
1031/* mode specified on the command line */
1032struct drm_cmdline_mode {
1033        bool specified;
1034        bool refresh_specified;
1035        bool bpp_specified;
1036        int xres, yres;
1037        int bpp;
1038        int refresh;
1039        bool rb;
1040        bool interlace;
1041        bool cvt;
1042        bool margins;
1043        enum drm_connector_force force;
1044};
1045
1046
1047struct drm_pending_vblank_event {
1048        struct drm_pending_event base;
1049        int pipe;
1050        struct drm_event_vblank event;
1051};
1052
1053/**
1054 * DRM device structure. This structure represent a complete card that
1055 * may contain multiple heads.
1056 */
1057struct drm_device {
1058        struct list_head driver_item;   /**< list of devices per driver */
1059        char *devname;                  /**< For /proc/interrupts */
1060        int if_version;                 /**< Highest interface version set */
1061
1062        /** \name Locks */
1063        /*@{ */
1064        spinlock_t count_lock;          /**< For inuse, drm_device::open_count, drm_device::buf_use */
1065        struct mutex struct_mutex;      /**< For others */
1066        /*@} */
1067
1068        /** \name Usage Counters */
1069        /*@{ */
1070        int open_count;                 /**< Outstanding files open */
1071        atomic_t ioctl_count;           /**< Outstanding IOCTLs pending */
1072        atomic_t vma_count;             /**< Outstanding vma areas open */
1073        int buf_use;                    /**< Buffers in use -- cannot alloc */
1074        atomic_t buf_alloc;             /**< Buffer allocation in progress */
1075        /*@} */
1076
1077        /** \name Performance counters */
1078        /*@{ */
1079        unsigned long counters;
1080        enum drm_stat_type types[15];
1081        atomic_t counts[15];
1082        /*@} */
1083
1084        struct list_head filelist;
1085
1086        /** \name Memory management */
1087        /*@{ */
1088        struct list_head maplist;       /**< Linked list of regions */
1089        int map_count;                  /**< Number of mappable regions */
1090        struct drm_open_hash map_hash;  /**< User token hash table for maps */
1091
1092        /** \name Context handle management */
1093        /*@{ */
1094        struct list_head ctxlist;       /**< Linked list of context handles */
1095        int ctx_count;                  /**< Number of context handles */
1096        struct mutex ctxlist_mutex;     /**< For ctxlist */
1097
1098        struct idr ctx_idr;
1099
1100        struct list_head vmalist;       /**< List of vmas (for debugging) */
1101
1102        /*@} */
1103
1104        /** \name DMA support */
1105        /*@{ */
1106        struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
1107        /*@} */
1108
1109        /** \name Context support */
1110        /*@{ */
1111        int irq_enabled;                /**< True if irq handler is enabled */
1112        __volatile__ long context_flag; /**< Context swapping flag */
1113        __volatile__ long interrupt_flag; /**< Interruption handler flag */
1114        __volatile__ long dma_flag;     /**< DMA dispatch flag */
1115        wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
1116        int last_checked;               /**< Last context checked for DMA */
1117        int last_context;               /**< Last current context */
1118        unsigned long last_switch;      /**< jiffies at last context switch */
1119        /*@} */
1120
1121        struct work_struct work;
1122        /** \name VBLANK IRQ support */
1123        /*@{ */
1124
1125        /*
1126         * At load time, disabling the vblank interrupt won't be allowed since
1127         * old clients may not call the modeset ioctl and therefore misbehave.
1128         * Once the modeset ioctl *has* been called though, we can safely
1129         * disable them when unused.
1130         */
1131        int vblank_disable_allowed;
1132
1133        wait_queue_head_t *vbl_queue;   /**< VBLANK wait queue */
1134        atomic_t *_vblank_count;        /**< number of VBLANK interrupts (driver must alloc the right number of counters) */
1135        struct timeval *_vblank_time;   /**< timestamp of current vblank_count (drivers must alloc right number of fields) */
1136        spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
1137        spinlock_t vbl_lock;
1138        atomic_t *vblank_refcount;      /* number of users of vblank interruptsper crtc */
1139        u32 *last_vblank;               /* protected by dev->vbl_lock, used */
1140                                        /* for wraparound handling */
1141        int *vblank_enabled;            /* so we don't call enable more than
1142                                           once per disable */
1143        int *vblank_inmodeset;          /* Display driver is setting mode */
1144        u32 *last_vblank_wait;          /* Last vblank seqno waited per CRTC */
1145        struct timer_list vblank_disable_timer;
1146
1147        u32 max_vblank_count;           /**< size of vblank counter register */
1148
1149        /**
1150         * List of events
1151         */
1152        struct list_head vblank_event_list;
1153        spinlock_t event_lock;
1154
1155        /*@} */
1156        cycles_t ctx_start;
1157        cycles_t lck_start;
1158
1159        struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */
1160        wait_queue_head_t buf_readers;  /**< Processes waiting to read */
1161        wait_queue_head_t buf_writers;  /**< Processes waiting to ctx switch */
1162
1163        struct drm_agp_head *agp;       /**< AGP data */
1164
1165        struct device *dev;             /**< Device structure */
1166        struct pci_dev *pdev;           /**< PCI device structure */
1167        int pci_vendor;                 /**< PCI vendor id */
1168        int pci_device;                 /**< PCI device id */
1169#ifdef __alpha__
1170        struct pci_controller *hose;
1171#endif
1172
1173        struct platform_device *platformdev; /**< Platform device struture */
1174        struct usb_device *usbdev;
1175
1176        struct drm_sg_mem *sg;  /**< Scatter gather memory */
1177        unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
1178        void *dev_private;              /**< device private data */
1179        void *mm_private;
1180        struct address_space *dev_mapping;
1181        struct drm_sigdata sigdata;        /**< For block_all_signals */
1182        sigset_t sigmask;
1183
1184        struct drm_driver *driver;
1185        struct drm_local_map *agp_buffer_map;
1186        unsigned int agp_buffer_token;
1187        struct drm_minor *control;              /**< Control node for card */
1188        struct drm_minor *primary;              /**< render type primary screen head */
1189
1190        struct drm_mode_config mode_config;     /**< Current mode config */
1191
1192        /** \name GEM information */
1193        /*@{ */
1194        spinlock_t object_name_lock;
1195        struct idr object_name_idr;
1196        /*@} */
1197        int switch_power_state;
1198
1199        atomic_t unplugged; /* device has been unplugged or gone away */
1200};
1201
1202#define DRM_SWITCH_POWER_ON 0
1203#define DRM_SWITCH_POWER_OFF 1
1204#define DRM_SWITCH_POWER_CHANGING 2
1205
1206static __inline__ int drm_core_check_feature(struct drm_device *dev,
1207                                             int feature)
1208{
1209        return ((dev->driver->driver_features & feature) ? 1 : 0);
1210}
1211
1212static inline int drm_dev_to_irq(struct drm_device *dev)
1213{
1214        return dev->driver->bus->get_irq(dev);
1215}
1216
1217
1218#if __OS_HAS_AGP
1219static inline int drm_core_has_AGP(struct drm_device *dev)
1220{
1221        return drm_core_check_feature(dev, DRIVER_USE_AGP);
1222}
1223#else
1224#define drm_core_has_AGP(dev) (0)
1225#endif
1226
1227#if __OS_HAS_MTRR
1228static inline int drm_core_has_MTRR(struct drm_device *dev)
1229{
1230        return drm_core_check_feature(dev, DRIVER_USE_MTRR);
1231}
1232
1233#define DRM_MTRR_WC             MTRR_TYPE_WRCOMB
1234
1235static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1236                               unsigned int flags)
1237{
1238        return mtrr_add(offset, size, flags, 1);
1239}
1240
1241static inline int drm_mtrr_del(int handle, unsigned long offset,
1242                               unsigned long size, unsigned int flags)
1243{
1244        return mtrr_del(handle, offset, size);
1245}
1246
1247#else
1248#define drm_core_has_MTRR(dev) (0)
1249
1250#define DRM_MTRR_WC             0
1251
1252static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1253                               unsigned int flags)
1254{
1255        return 0;
1256}
1257
1258static inline int drm_mtrr_del(int handle, unsigned long offset,
1259                               unsigned long size, unsigned int flags)
1260{
1261        return 0;
1262}
1263#endif
1264
1265static inline void drm_device_set_unplugged(struct drm_device *dev)
1266{
1267        smp_wmb();
1268        atomic_set(&dev->unplugged, 1);
1269}
1270
1271static inline int drm_device_is_unplugged(struct drm_device *dev)
1272{
1273        int ret = atomic_read(&dev->unplugged);
1274        smp_rmb();
1275        return ret;
1276}
1277
1278/******************************************************************/
1279/** \name Internal function definitions */
1280/*@{*/
1281
1282                                /* Driver support (drm_drv.h) */
1283extern long drm_ioctl(struct file *filp,
1284                      unsigned int cmd, unsigned long arg);
1285extern long drm_compat_ioctl(struct file *filp,
1286                             unsigned int cmd, unsigned long arg);
1287extern int drm_lastclose(struct drm_device *dev);
1288
1289                                /* Device support (drm_fops.h) */
1290extern struct mutex drm_global_mutex;
1291extern int drm_open(struct inode *inode, struct file *filp);
1292extern int drm_stub_open(struct inode *inode, struct file *filp);
1293extern int drm_fasync(int fd, struct file *filp, int on);
1294extern ssize_t drm_read(struct file *filp, char __user *buffer,
1295                        size_t count, loff_t *offset);
1296extern int drm_release(struct inode *inode, struct file *filp);
1297
1298                                /* Mapping support (drm_vm.h) */
1299extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1300extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1301extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1302extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1303extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1304
1305                                /* Memory management support (drm_memory.h) */
1306#include "drm_memory.h"
1307extern void drm_free_agp(DRM_AGP_MEM * handle, int pages);
1308extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
1309extern DRM_AGP_MEM *drm_agp_bind_pages(struct drm_device *dev,
1310                                       struct page **pages,
1311                                       unsigned long num_pages,
1312                                       uint32_t gtt_offset,
1313                                       uint32_t type);
1314extern int drm_unbind_agp(DRM_AGP_MEM * handle);
1315
1316                                /* Misc. IOCTL support (drm_ioctl.h) */
1317extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1318                            struct drm_file *file_priv);
1319extern int drm_getunique(struct drm_device *dev, void *data,
1320                         struct drm_file *file_priv);
1321extern int drm_setunique(struct drm_device *dev, void *data,
1322                         struct drm_file *file_priv);
1323extern int drm_getmap(struct drm_device *dev, void *data,
1324                      struct drm_file *file_priv);
1325extern int drm_getclient(struct drm_device *dev, void *data,
1326                         struct drm_file *file_priv);
1327extern int drm_getstats(struct drm_device *dev, void *data,
1328                        struct drm_file *file_priv);
1329extern int drm_getcap(struct drm_device *dev, void *data,
1330                      struct drm_file *file_priv);
1331extern int drm_setversion(struct drm_device *dev, void *data,
1332                          struct drm_file *file_priv);
1333extern int drm_noop(struct drm_device *dev, void *data,
1334                    struct drm_file *file_priv);
1335
1336                                /* Context IOCTL support (drm_context.h) */
1337extern int drm_resctx(struct drm_device *dev, void *data,
1338                      struct drm_file *file_priv);
1339extern int drm_addctx(struct drm_device *dev, void *data,
1340                      struct drm_file *file_priv);
1341extern int drm_modctx(struct drm_device *dev, void *data,
1342                      struct drm_file *file_priv);
1343extern int drm_getctx(struct drm_device *dev, void *data,
1344                      struct drm_file *file_priv);
1345extern int drm_switchctx(struct drm_device *dev, void *data,
1346                         struct drm_file *file_priv);
1347extern int drm_newctx(struct drm_device *dev, void *data,
1348                      struct drm_file *file_priv);
1349extern int drm_rmctx(struct drm_device *dev, void *data,
1350                     struct drm_file *file_priv);
1351
1352extern int drm_ctxbitmap_init(struct drm_device *dev);
1353extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1354extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1355
1356extern int drm_setsareactx(struct drm_device *dev, void *data,
1357                           struct drm_file *file_priv);
1358extern int drm_getsareactx(struct drm_device *dev, void *data,
1359                           struct drm_file *file_priv);
1360
1361                                /* Authentication IOCTL support (drm_auth.h) */
1362extern int drm_getmagic(struct drm_device *dev, void *data,
1363                        struct drm_file *file_priv);
1364extern int drm_authmagic(struct drm_device *dev, void *data,
1365                         struct drm_file *file_priv);
1366extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1367
1368/* Cache management (drm_cache.c) */
1369void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1370void drm_clflush_virt_range(char *addr, unsigned long length);
1371
1372                                /* Locking IOCTL support (drm_lock.h) */
1373extern int drm_lock(struct drm_device *dev, void *data,
1374                    struct drm_file *file_priv);
1375extern int drm_unlock(struct drm_device *dev, void *data,
1376                      struct drm_file *file_priv);
1377extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1378extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1379extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1380
1381/*
1382 * These are exported to drivers so that they can implement fencing using
1383 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1384 */
1385
1386extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1387
1388                                /* Buffer management support (drm_bufs.h) */
1389extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1390extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1391extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1392                      unsigned int size, enum drm_map_type type,
1393                      enum drm_map_flags flags, struct drm_local_map **map_ptr);
1394extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1395                            struct drm_file *file_priv);
1396extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1397extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1398extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1399                           struct drm_file *file_priv);
1400extern int drm_addbufs(struct drm_device *dev, void *data,
1401                       struct drm_file *file_priv);
1402extern int drm_infobufs(struct drm_device *dev, void *data,
1403                        struct drm_file *file_priv);
1404extern int drm_markbufs(struct drm_device *dev, void *data,
1405                        struct drm_file *file_priv);
1406extern int drm_freebufs(struct drm_device *dev, void *data,
1407                        struct drm_file *file_priv);
1408extern int drm_mapbufs(struct drm_device *dev, void *data,
1409                       struct drm_file *file_priv);
1410extern int drm_order(unsigned long size);
1411
1412                                /* DMA support (drm_dma.h) */
1413extern int drm_dma_setup(struct drm_device *dev);
1414extern void drm_dma_takedown(struct drm_device *dev);
1415extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1416extern void drm_core_reclaim_buffers(struct drm_device *dev,
1417                                     struct drm_file *filp);
1418
1419                                /* IRQ support (drm_irq.h) */
1420extern int drm_control(struct drm_device *dev, void *data,
1421                       struct drm_file *file_priv);
1422extern int drm_irq_install(struct drm_device *dev);
1423extern int drm_irq_uninstall(struct drm_device *dev);
1424
1425extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1426extern int drm_wait_vblank(struct drm_device *dev, void *data,
1427                           struct drm_file *filp);
1428extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
1429extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1430extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1431                                     struct timeval *vblanktime);
1432extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1433extern int drm_vblank_get(struct drm_device *dev, int crtc);
1434extern void drm_vblank_put(struct drm_device *dev, int crtc);
1435extern void drm_vblank_off(struct drm_device *dev, int crtc);
1436extern void drm_vblank_cleanup(struct drm_device *dev);
1437extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1438                                     struct timeval *tvblank, unsigned flags);
1439extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1440                                                 int crtc, int *max_error,
1441                                                 struct timeval *vblank_time,
1442                                                 unsigned flags,
1443                                                 struct drm_crtc *refcrtc);
1444extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);
1445
1446extern bool
1447drm_mode_parse_command_line_for_connector(const char *mode_option,
1448                                          struct drm_connector *connector,
1449                                          struct drm_cmdline_mode *mode);
1450
1451extern struct drm_display_mode *
1452drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1453                                  struct drm_cmdline_mode *cmd);
1454
1455/* Modesetting support */
1456extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1457extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1458extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1459                           struct drm_file *file_priv);
1460
1461                                /* AGP/GART support (drm_agpsupport.h) */
1462extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
1463extern int drm_agp_acquire(struct drm_device *dev);
1464extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
1465                                 struct drm_file *file_priv);
1466extern int drm_agp_release(struct drm_device *dev);
1467extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
1468                                 struct drm_file *file_priv);
1469extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1470extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
1471                                struct drm_file *file_priv);
1472extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
1473extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
1474                        struct drm_file *file_priv);
1475extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1476extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
1477                         struct drm_file *file_priv);
1478extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1479extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
1480                        struct drm_file *file_priv);
1481extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1482extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
1483                          struct drm_file *file_priv);
1484extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1485extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
1486                        struct drm_file *file_priv);
1487
1488                                /* Stub support (drm_stub.h) */
1489extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1490                               struct drm_file *file_priv);
1491extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1492                                struct drm_file *file_priv);
1493struct drm_master *drm_master_create(struct drm_minor *minor);
1494extern struct drm_master *drm_master_get(struct drm_master *master);
1495extern void drm_master_put(struct drm_master **master);
1496
1497extern void drm_put_dev(struct drm_device *dev);
1498extern int drm_put_minor(struct drm_minor **minor);
1499extern void drm_unplug_dev(struct drm_device *dev);
1500extern unsigned int drm_debug;
1501
1502extern unsigned int drm_vblank_offdelay;
1503extern unsigned int drm_timestamp_precision;
1504
1505extern struct class *drm_class;
1506extern struct proc_dir_entry *drm_proc_root;
1507extern struct dentry *drm_debugfs_root;
1508
1509extern struct idr drm_minors_idr;
1510
1511extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1512
1513                                /* Proc support (drm_proc.h) */
1514extern int drm_proc_init(struct drm_minor *minor, int minor_id,
1515                         struct proc_dir_entry *root);
1516extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);
1517
1518                                /* Debugfs support */
1519#if defined(CONFIG_DEBUG_FS)
1520extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1521                            struct dentry *root);
1522extern int drm_debugfs_create_files(struct drm_info_list *files, int count,
1523                                    struct dentry *root, struct drm_minor *minor);
1524extern int drm_debugfs_remove_files(struct drm_info_list *files, int count,
1525                                    struct drm_minor *minor);
1526extern int drm_debugfs_cleanup(struct drm_minor *minor);
1527#endif
1528
1529                                /* Info file support */
1530extern int drm_name_info(struct seq_file *m, void *data);
1531extern int drm_vm_info(struct seq_file *m, void *data);
1532extern int drm_bufs_info(struct seq_file *m, void *data);
1533extern int drm_vblank_info(struct seq_file *m, void *data);
1534extern int drm_clients_info(struct seq_file *m, void* data);
1535extern int drm_gem_name_info(struct seq_file *m, void *data);
1536
1537
1538extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1539                struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1540                int *prime_fd);
1541extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1542                struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1543
1544extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1545                                        struct drm_file *file_priv);
1546extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1547                                        struct drm_file *file_priv);
1548
1549extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1550                                            dma_addr_t *addrs, int max_pages);
1551extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1552extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1553
1554
1555void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1556void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1557int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
1558int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
1559void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1560
1561int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
1562int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
1563                         struct drm_gem_object **obj);
1564
1565#if DRM_DEBUG_CODE
1566extern int drm_vma_info(struct seq_file *m, void *data);
1567#endif
1568
1569                                /* Scatter Gather Support (drm_scatter.h) */
1570extern void drm_sg_cleanup(struct drm_sg_mem * entry);
1571extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1572                        struct drm_file *file_priv);
1573extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
1574extern int drm_sg_free(struct drm_device *dev, void *data,
1575                       struct drm_file *file_priv);
1576
1577                               /* ATI PCIGART support (ati_pcigart.h) */
1578extern int drm_ati_pcigart_init(struct drm_device *dev,
1579                                struct drm_ati_pcigart_info * gart_info);
1580extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1581                                   struct drm_ati_pcigart_info * gart_info);
1582
1583extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1584                                       size_t align);
1585extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1586extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1587
1588                               /* sysfs support (drm_sysfs.c) */
1589struct drm_sysfs_class;
1590extern struct class *drm_sysfs_create(struct module *owner, char *name);
1591extern void drm_sysfs_destroy(void);
1592extern int drm_sysfs_device_add(struct drm_minor *minor);
1593extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1594extern void drm_sysfs_device_remove(struct drm_minor *minor);
1595extern char *drm_get_connector_status_name(enum drm_connector_status status);
1596extern int drm_sysfs_connector_add(struct drm_connector *connector);
1597extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1598
1599/* Graphics Execution Manager library functions (drm_gem.c) */
1600int drm_gem_init(struct drm_device *dev);
1601void drm_gem_destroy(struct drm_device *dev);
1602void drm_gem_object_release(struct drm_gem_object *obj);
1603void drm_gem_object_free(struct kref *kref);
1604struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
1605                                            size_t size);
1606int drm_gem_object_init(struct drm_device *dev,
1607                        struct drm_gem_object *obj, size_t size);
1608int drm_gem_private_object_init(struct drm_device *dev,
1609                        struct drm_gem_object *obj, size_t size);
1610void drm_gem_object_handle_free(struct drm_gem_object *obj);
1611void drm_gem_vm_open(struct vm_area_struct *vma);
1612void drm_gem_vm_close(struct vm_area_struct *vma);
1613int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1614
1615#include "drm_global.h"
1616
1617static inline void
1618drm_gem_object_reference(struct drm_gem_object *obj)
1619{
1620        kref_get(&obj->refcount);
1621}
1622
1623static inline void
1624drm_gem_object_unreference(struct drm_gem_object *obj)
1625{
1626        if (obj != NULL)
1627                kref_put(&obj->refcount, drm_gem_object_free);
1628}
1629
1630static inline void
1631drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1632{
1633        if (obj != NULL) {
1634                struct drm_device *dev = obj->dev;
1635                mutex_lock(&dev->struct_mutex);
1636                kref_put(&obj->refcount, drm_gem_object_free);
1637                mutex_unlock(&dev->struct_mutex);
1638        }
1639}
1640
1641int drm_gem_handle_create(struct drm_file *file_priv,
1642                          struct drm_gem_object *obj,
1643                          u32 *handlep);
1644int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1645
1646static inline void
1647drm_gem_object_handle_reference(struct drm_gem_object *obj)
1648{
1649        drm_gem_object_reference(obj);
1650        atomic_inc(&obj->handle_count);
1651}
1652
1653static inline void
1654drm_gem_object_handle_unreference(struct drm_gem_object *obj)
1655{
1656        if (obj == NULL)
1657                return;
1658
1659        if (atomic_read(&obj->handle_count) == 0)
1660                return;
1661        /*
1662         * Must bump handle count first as this may be the last
1663         * ref, in which case the object would disappear before we
1664         * checked for a name
1665         */
1666        if (atomic_dec_and_test(&obj->handle_count))
1667                drm_gem_object_handle_free(obj);
1668        drm_gem_object_unreference(obj);
1669}
1670
1671static inline void
1672drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
1673{
1674        if (obj == NULL)
1675                return;
1676
1677        if (atomic_read(&obj->handle_count) == 0)
1678                return;
1679
1680        /*
1681        * Must bump handle count first as this may be the last
1682        * ref, in which case the object would disappear before we
1683        * checked for a name
1684        */
1685
1686        if (atomic_dec_and_test(&obj->handle_count))
1687                drm_gem_object_handle_free(obj);
1688        drm_gem_object_unreference_unlocked(obj);
1689}
1690
1691void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1692int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1693
1694struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1695                                             struct drm_file *filp,
1696                                             u32 handle);
1697int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1698                        struct drm_file *file_priv);
1699int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1700                        struct drm_file *file_priv);
1701int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1702                       struct drm_file *file_priv);
1703void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1704void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1705
1706extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1707extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1708extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1709
1710static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1711                                                         unsigned int token)
1712{
1713        struct drm_map_list *_entry;
1714        list_for_each_entry(_entry, &dev->maplist, head)
1715            if (_entry->user_token == token)
1716                return _entry->map;
1717        return NULL;
1718}
1719
1720static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1721{
1722}
1723
1724#include "drm_mem_util.h"
1725
1726extern int drm_fill_in_dev(struct drm_device *dev,
1727                           const struct pci_device_id *ent,
1728                           struct drm_driver *driver);
1729int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
1730/*@}*/
1731
1732/* PCI section */
1733static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1734{
1735        if (dev->driver->device_is_agp != NULL) {
1736                int err = (*dev->driver->device_is_agp) (dev);
1737
1738                if (err != 2) {
1739                        return err;
1740                }
1741        }
1742
1743        return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1744}
1745
1746extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1747extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1748extern int drm_get_pci_dev(struct pci_dev *pdev,
1749                           const struct pci_device_id *ent,
1750                           struct drm_driver *driver);
1751
1752#define DRM_PCIE_SPEED_25 1
1753#define DRM_PCIE_SPEED_50 2
1754#define DRM_PCIE_SPEED_80 4
1755
1756extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1757
1758/* platform section */
1759extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1760extern void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device);
1761
1762extern int drm_get_platform_dev(struct platform_device *pdev,
1763                                struct drm_driver *driver);
1764
1765/* returns true if currently okay to sleep */
1766static __inline__ bool drm_can_sleep(void)
1767{
1768        if (in_atomic() || in_dbg_master() || irqs_disabled())
1769                return false;
1770        return true;
1771}
1772
1773#endif                          /* __KERNEL__ */
1774#endif
1775
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