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/drm.h>
  76#include <drm/drm_sarea.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
  83struct module;
  84
  85struct drm_file;
  86struct drm_device;
  87
  88#include <drm/drm_os_linux.h>
  89#include <drm/drm_hashtab.h>
  90#include <drm/drm_mm.h>
  91
  92#define DRM_UT_CORE             0x01
  93#define DRM_UT_DRIVER           0x02
  94#define DRM_UT_KMS              0x04
  95#define DRM_UT_PRIME            0x08
  96/*
  97 * Three debug levels are defined.
  98 * drm_core, drm_driver, drm_kms
  99 * drm_core level can be used in the generic drm code. For example:
 100 *      drm_ioctl, drm_mm, drm_memory
 101 * The macro definition of DRM_DEBUG is used.
 102 *      DRM_DEBUG(fmt, args...)
 103 *      The debug info by using the DRM_DEBUG can be obtained by adding
 104 *      the boot option of "drm.debug=1".
 105 *
 106 * drm_driver level can be used in the specific drm driver. It is used
 107 * to add the debug info related with the drm driver. For example:
 108 * i915_drv, i915_dma, i915_gem, radeon_drv,
 109 *      The macro definition of DRM_DEBUG_DRIVER can be used.
 110 *      DRM_DEBUG_DRIVER(fmt, args...)
 111 *      The debug info by using the DRM_DEBUG_DRIVER can be obtained by
 112 *      adding the boot option of "drm.debug=0x02"
 113 *
 114 * drm_kms level can be used in the KMS code related with specific drm driver.
 115 * It is used to add the debug info related with KMS mode. For example:
 116 * the connector/crtc ,
 117 *      The macro definition of DRM_DEBUG_KMS can be used.
 118 *      DRM_DEBUG_KMS(fmt, args...)
 119 *      The debug info by using the DRM_DEBUG_KMS can be obtained by
 120 *      adding the boot option of "drm.debug=0x04"
 121 *
 122 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
 123 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
 124 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
 125 * using the DRM_DEBUG_KMS and DRM_DEBUG.
 126 */
 127
 128extern __printf(4, 5)
 129void drm_ut_debug_printk(unsigned int request_level,
 130                         const char *prefix,
 131                         const char *function_name,
 132                         const char *format, ...);
 133extern __printf(2, 3)
 134int drm_err(const char *func, const char *format, ...);
 135
 136/***********************************************************************/
 137/** \name DRM template customization defaults */
 138/*@{*/
 139
 140/* driver capabilities and requirements mask */
 141#define DRIVER_USE_AGP     0x1
 142#define DRIVER_REQUIRE_AGP 0x2
 143#define DRIVER_USE_MTRR    0x4
 144#define DRIVER_PCI_DMA     0x8
 145#define DRIVER_SG          0x10
 146#define DRIVER_HAVE_DMA    0x20
 147#define DRIVER_HAVE_IRQ    0x40
 148#define DRIVER_IRQ_SHARED  0x80
 149#define DRIVER_IRQ_VBL     0x100
 150#define DRIVER_DMA_QUEUE   0x200
 151#define DRIVER_FB_DMA      0x400
 152#define DRIVER_IRQ_VBL2    0x800
 153#define DRIVER_GEM         0x1000
 154#define DRIVER_MODESET     0x2000
 155#define DRIVER_PRIME       0x4000
 156
 157#define DRIVER_BUS_PCI 0x1
 158#define DRIVER_BUS_PLATFORM 0x2
 159#define DRIVER_BUS_USB 0x3
 160
 161/***********************************************************************/
 162/** \name Begin the DRM... */
 163/*@{*/
 164
 165#define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
 166                                     also include looping detection. */
 167
 168#define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
 169#define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
 170#define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
 171#define DRM_LOOPING_LIMIT     5000000
 172#define DRM_TIME_SLICE        (HZ/20)  /**< Time slice for GLXContexts */
 173#define DRM_LOCK_SLICE        1 /**< Time slice for lock, in jiffies */
 174
 175#define DRM_FLAG_DEBUG    0x01
 176
 177#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
 178#define DRM_MAP_HASH_OFFSET 0x10000000
 179
 180/*@}*/
 181
 182/***********************************************************************/
 183/** \name Macros to make printk easier */
 184/*@{*/
 185
 186/**
 187 * Error output.
 188 *
 189 * \param fmt printf() like format string.
 190 * \param arg arguments
 191 */
 192#define DRM_ERROR(fmt, ...)                             \
 193        drm_err(__func__, fmt, ##__VA_ARGS__)
 194
 195#define DRM_INFO(fmt, ...)                              \
 196        printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
 197
 198/**
 199 * Debug output.
 200 *
 201 * \param fmt printf() like format string.
 202 * \param arg arguments
 203 */
 204#if DRM_DEBUG_CODE
 205#define DRM_DEBUG(fmt, args...)                                         \
 206        do {                                                            \
 207                drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME,              \
 208                                        __func__, fmt, ##args);         \
 209        } while (0)
 210
 211#define DRM_DEBUG_DRIVER(fmt, args...)                                  \
 212        do {                                                            \
 213                drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME,            \
 214                                        __func__, fmt, ##args);         \
 215        } while (0)
 216#define DRM_DEBUG_KMS(fmt, args...)                             \
 217        do {                                                            \
 218                drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME,               \
 219                                         __func__, fmt, ##args);        \
 220        } while (0)
 221#define DRM_DEBUG_PRIME(fmt, args...)                                   \
 222        do {                                                            \
 223                drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME,             \
 224                                        __func__, fmt, ##args);         \
 225        } while (0)
 226#define DRM_LOG(fmt, args...)                                           \
 227        do {                                                            \
 228                drm_ut_debug_printk(DRM_UT_CORE, NULL,                  \
 229                                        NULL, fmt, ##args);             \
 230        } while (0)
 231#define DRM_LOG_KMS(fmt, args...)                                       \
 232        do {                                                            \
 233                drm_ut_debug_printk(DRM_UT_KMS, NULL,                   \
 234                                        NULL, fmt, ##args);             \
 235        } while (0)
 236#define DRM_LOG_MODE(fmt, args...)                                      \
 237        do {                                                            \
 238                drm_ut_debug_printk(DRM_UT_MODE, NULL,                  \
 239                                        NULL, fmt, ##args);             \
 240        } while (0)
 241#define DRM_LOG_DRIVER(fmt, args...)                                    \
 242        do {                                                            \
 243                drm_ut_debug_printk(DRM_UT_DRIVER, NULL,                \
 244                                        NULL, fmt, ##args);             \
 245        } while (0)
 246#else
 247#define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
 248#define DRM_DEBUG_KMS(fmt, args...)     do { } while (0)
 249#define DRM_DEBUG_PRIME(fmt, args...)   do { } while (0)
 250#define DRM_DEBUG(fmt, arg...)           do { } while (0)
 251#define DRM_LOG(fmt, arg...)            do { } while (0)
 252#define DRM_LOG_KMS(fmt, args...) do { } while (0)
 253#define DRM_LOG_MODE(fmt, arg...) do { } while (0)
 254#define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
 255
 256#endif
 257
 258/*@}*/
 259
 260/***********************************************************************/
 261/** \name Internal types and structures */
 262/*@{*/
 263
 264#define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
 265
 266#define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
 267#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
 268
 269#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 270
 271/**
 272 * Test that the hardware lock is held by the caller, returning otherwise.
 273 *
 274 * \param dev DRM device.
 275 * \param filp file pointer of the caller.
 276 */
 277#define LOCK_TEST_WITH_RETURN( dev, _file_priv )                                \
 278do {                                                                            \
 279        if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||       \
 280            _file_priv->master->lock.file_priv != _file_priv)   {               \
 281                DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
 282                           __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
 283                           _file_priv->master->lock.file_priv, _file_priv);     \
 284                return -EINVAL;                                                 \
 285        }                                                                       \
 286} while (0)
 287
 288/**
 289 * Ioctl function type.
 290 *
 291 * \param inode device inode.
 292 * \param file_priv DRM file private pointer.
 293 * \param cmd command.
 294 * \param arg argument.
 295 */
 296typedef int drm_ioctl_t(struct drm_device *dev, void *data,
 297                        struct drm_file *file_priv);
 298
 299typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
 300                               unsigned long arg);
 301
 302#define DRM_IOCTL_NR(n)                _IOC_NR(n)
 303#define DRM_MAJOR       226
 304
 305#define DRM_AUTH        0x1
 306#define DRM_MASTER      0x2
 307#define DRM_ROOT_ONLY   0x4
 308#define DRM_CONTROL_ALLOW 0x8
 309#define DRM_UNLOCKED    0x10
 310
 311struct drm_ioctl_desc {
 312        unsigned int cmd;
 313        int flags;
 314        drm_ioctl_t *func;
 315        unsigned int cmd_drv;
 316};
 317
 318/**
 319 * Creates a driver or general drm_ioctl_desc array entry for the given
 320 * ioctl, for use by drm_ioctl().
 321 */
 322
 323#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)                 \
 324        [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl}
 325
 326struct drm_magic_entry {
 327        struct list_head head;
 328        struct drm_hash_item hash_item;
 329        struct drm_file *priv;
 330};
 331
 332struct drm_vma_entry {
 333        struct list_head head;
 334        struct vm_area_struct *vma;
 335        pid_t pid;
 336};
 337
 338/**
 339 * DMA buffer.
 340 */
 341struct drm_buf {
 342        int idx;                       /**< Index into master buflist */
 343        int total;                     /**< Buffer size */
 344        int order;                     /**< log-base-2(total) */
 345        int used;                      /**< Amount of buffer in use (for DMA) */
 346        unsigned long offset;          /**< Byte offset (used internally) */
 347        void *address;                 /**< Address of buffer */
 348        unsigned long bus_address;     /**< Bus address of buffer */
 349        struct drm_buf *next;          /**< Kernel-only: used for free list */
 350        __volatile__ int waiting;      /**< On kernel DMA queue */
 351        __volatile__ int pending;      /**< On hardware DMA queue */
 352        struct drm_file *file_priv;    /**< Private of holding file descr */
 353        int context;                   /**< Kernel queue for this buffer */
 354        int while_locked;              /**< Dispatch this buffer while locked */
 355        enum {
 356                DRM_LIST_NONE = 0,
 357                DRM_LIST_FREE = 1,
 358                DRM_LIST_WAIT = 2,
 359                DRM_LIST_PEND = 3,
 360                DRM_LIST_PRIO = 4,
 361                DRM_LIST_RECLAIM = 5
 362        } list;                        /**< Which list we're on */
 363
 364        int dev_priv_size;               /**< Size of buffer private storage */
 365        void *dev_private;               /**< Per-buffer private storage */
 366};
 367
 368/** bufs is one longer than it has to be */
 369struct drm_waitlist {
 370        int count;                      /**< Number of possible buffers */
 371        struct drm_buf **bufs;          /**< List of pointers to buffers */
 372        struct drm_buf **rp;                    /**< Read pointer */
 373        struct drm_buf **wp;                    /**< Write pointer */
 374        struct drm_buf **end;           /**< End pointer */
 375        spinlock_t read_lock;
 376        spinlock_t write_lock;
 377};
 378
 379struct drm_freelist {
 380        int initialized;               /**< Freelist in use */
 381        atomic_t count;                /**< Number of free buffers */
 382        struct drm_buf *next;          /**< End pointer */
 383
 384        wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
 385        int low_mark;                  /**< Low water mark */
 386        int high_mark;                 /**< High water mark */
 387        atomic_t wfh;                  /**< If waiting for high mark */
 388        spinlock_t lock;
 389};
 390
 391typedef struct drm_dma_handle {
 392        dma_addr_t busaddr;
 393        void *vaddr;
 394        size_t size;
 395} drm_dma_handle_t;
 396
 397/**
 398 * Buffer entry.  There is one of this for each buffer size order.
 399 */
 400struct drm_buf_entry {
 401        int buf_size;                   /**< size */
 402        int buf_count;                  /**< number of buffers */
 403        struct drm_buf *buflist;                /**< buffer list */
 404        int seg_count;
 405        int page_order;
 406        struct drm_dma_handle **seglist;
 407
 408        struct drm_freelist freelist;
 409};
 410
 411/* Event queued up for userspace to read */
 412struct drm_pending_event {
 413        struct drm_event *event;
 414        struct list_head link;
 415        struct drm_file *file_priv;
 416        pid_t pid; /* pid of requester, no guarantee it's valid by the time
 417                      we deliver the event, for tracing only */
 418        void (*destroy)(struct drm_pending_event *event);
 419};
 420
 421/* initial implementaton using a linked list - todo hashtab */
 422struct drm_prime_file_private {
 423        struct list_head head;
 424        struct mutex lock;
 425};
 426
 427/** File private data */
 428struct drm_file {
 429        int authenticated;
 430        struct pid *pid;
 431        kuid_t uid;
 432        drm_magic_t magic;
 433        unsigned long ioctl_count;
 434        struct list_head lhead;
 435        struct drm_minor *minor;
 436        unsigned long lock_count;
 437
 438        /** Mapping of mm object handles to object pointers. */
 439        struct idr object_idr;
 440        /** Lock for synchronization of access to object_idr. */
 441        spinlock_t table_lock;
 442
 443        struct file *filp;
 444        void *driver_priv;
 445
 446        int is_master; /* this file private is a master for a minor */
 447        struct drm_master *master; /* master this node is currently associated with
 448                                      N.B. not always minor->master */
 449        struct list_head fbs;
 450
 451        wait_queue_head_t event_wait;
 452        struct list_head event_list;
 453        int event_space;
 454
 455        struct drm_prime_file_private prime;
 456};
 457
 458/** Wait queue */
 459struct drm_queue {
 460        atomic_t use_count;             /**< Outstanding uses (+1) */
 461        atomic_t finalization;          /**< Finalization in progress */
 462        atomic_t block_count;           /**< Count of processes waiting */
 463        atomic_t block_read;            /**< Queue blocked for reads */
 464        wait_queue_head_t read_queue;   /**< Processes waiting on block_read */
 465        atomic_t block_write;           /**< Queue blocked for writes */
 466        wait_queue_head_t write_queue;  /**< Processes waiting on block_write */
 467        atomic_t total_queued;          /**< Total queued statistic */
 468        atomic_t total_flushed;         /**< Total flushes statistic */
 469        atomic_t total_locks;           /**< Total locks statistics */
 470        enum drm_ctx_flags flags;       /**< Context preserving and 2D-only */
 471        struct drm_waitlist waitlist;   /**< Pending buffers */
 472        wait_queue_head_t flush_queue;  /**< Processes waiting until flush */
 473};
 474
 475/**
 476 * Lock data.
 477 */
 478struct drm_lock_data {
 479        struct drm_hw_lock *hw_lock;    /**< Hardware lock */
 480        /** Private of lock holder's file (NULL=kernel) */
 481        struct drm_file *file_priv;
 482        wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
 483        unsigned long lock_time;        /**< Time of last lock in jiffies */
 484        spinlock_t spinlock;
 485        uint32_t kernel_waiters;
 486        uint32_t user_waiters;
 487        int idle_has_lock;
 488};
 489
 490/**
 491 * DMA data.
 492 */
 493struct drm_device_dma {
 494
 495        struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   /**< buffers, grouped by their size order */
 496        int buf_count;                  /**< total number of buffers */
 497        struct drm_buf **buflist;               /**< Vector of pointers into drm_device_dma::bufs */
 498        int seg_count;
 499        int page_count;                 /**< number of pages */
 500        unsigned long *pagelist;        /**< page list */
 501        unsigned long byte_count;
 502        enum {
 503                _DRM_DMA_USE_AGP = 0x01,
 504                _DRM_DMA_USE_SG = 0x02,
 505                _DRM_DMA_USE_FB = 0x04,
 506                _DRM_DMA_USE_PCI_RO = 0x08
 507        } flags;
 508
 509};
 510
 511/**
 512 * AGP memory entry.  Stored as a doubly linked list.
 513 */
 514struct drm_agp_mem {
 515        unsigned long handle;           /**< handle */
 516        DRM_AGP_MEM *memory;
 517        unsigned long bound;            /**< address */
 518        int pages;
 519        struct list_head head;
 520};
 521
 522/**
 523 * AGP data.
 524 *
 525 * \sa drm_agp_init() and drm_device::agp.
 526 */
 527struct drm_agp_head {
 528        DRM_AGP_KERN agp_info;          /**< AGP device information */
 529        struct list_head memory;
 530        unsigned long mode;             /**< AGP mode */
 531        struct agp_bridge_data *bridge;
 532        int enabled;                    /**< whether the AGP bus as been enabled */
 533        int acquired;                   /**< whether the AGP device has been acquired */
 534        unsigned long base;
 535        int agp_mtrr;
 536        int cant_use_aperture;
 537        unsigned long page_mask;
 538};
 539
 540/**
 541 * Scatter-gather memory.
 542 */
 543struct drm_sg_mem {
 544        unsigned long handle;
 545        void *virtual;
 546        int pages;
 547        struct page **pagelist;
 548        dma_addr_t *busaddr;
 549};
 550
 551struct drm_sigdata {
 552        int context;
 553        struct drm_hw_lock *lock;
 554};
 555
 556
 557/**
 558 * Kernel side of a mapping
 559 */
 560struct drm_local_map {
 561        resource_size_t offset;  /**< Requested physical address (0 for SAREA)*/
 562        unsigned long size;      /**< Requested physical size (bytes) */
 563        enum drm_map_type type;  /**< Type of memory to map */
 564        enum drm_map_flags flags;        /**< Flags */
 565        void *handle;            /**< User-space: "Handle" to pass to mmap() */
 566                                 /**< Kernel-space: kernel-virtual address */
 567        int mtrr;                /**< MTRR slot used */
 568};
 569
 570typedef struct drm_local_map drm_local_map_t;
 571
 572/**
 573 * Mappings list
 574 */
 575struct drm_map_list {
 576        struct list_head head;          /**< list head */
 577        struct drm_hash_item hash;
 578        struct drm_local_map *map;      /**< mapping */
 579        uint64_t user_token;
 580        struct drm_master *master;
 581        struct drm_mm_node *file_offset_node;   /**< fake offset */
 582};
 583
 584/**
 585 * Context handle list
 586 */
 587struct drm_ctx_list {
 588        struct list_head head;          /**< list head */
 589        drm_context_t handle;           /**< context handle */
 590        struct drm_file *tag;           /**< associated fd private data */
 591};
 592
 593/* location of GART table */
 594#define DRM_ATI_GART_MAIN 1
 595#define DRM_ATI_GART_FB   2
 596
 597#define DRM_ATI_GART_PCI 1
 598#define DRM_ATI_GART_PCIE 2
 599#define DRM_ATI_GART_IGP 3
 600
 601struct drm_ati_pcigart_info {
 602        int gart_table_location;
 603        int gart_reg_if;
 604        void *addr;
 605        dma_addr_t bus_addr;
 606        dma_addr_t table_mask;
 607        struct drm_dma_handle *table_handle;
 608        struct drm_local_map mapping;
 609        int table_size;
 610};
 611
 612/**
 613 * GEM specific mm private for tracking GEM objects
 614 */
 615struct drm_gem_mm {
 616        struct drm_mm offset_manager;   /**< Offset mgmt for buffer objects */
 617        struct drm_open_hash offset_hash; /**< User token hash table for maps */
 618};
 619
 620/**
 621 * This structure defines the drm_mm memory object, which will be used by the
 622 * DRM for its buffer objects.
 623 */
 624struct drm_gem_object {
 625        /** Reference count of this object */
 626        struct kref refcount;
 627
 628        /** Handle count of this object. Each handle also holds a reference */
 629        atomic_t handle_count; /* number of handles on this object */
 630
 631        /** Related drm device */
 632        struct drm_device *dev;
 633
 634        /** File representing the shmem storage */
 635        struct file *filp;
 636
 637        /* Mapping info for this object */
 638        struct drm_map_list map_list;
 639
 640        /**
 641         * Size of the object, in bytes.  Immutable over the object's
 642         * lifetime.
 643         */
 644        size_t size;
 645
 646        /**
 647         * Global name for this object, starts at 1. 0 means unnamed.
 648         * Access is covered by the object_name_lock in the related drm_device
 649         */
 650        int name;
 651
 652        /**
 653         * Memory domains. These monitor which caches contain read/write data
 654         * related to the object. When transitioning from one set of domains
 655         * to another, the driver is called to ensure that caches are suitably
 656         * flushed and invalidated
 657         */
 658        uint32_t read_domains;
 659        uint32_t write_domain;
 660
 661        /**
 662         * While validating an exec operation, the
 663         * new read/write domain values are computed here.
 664         * They will be transferred to the above values
 665         * at the point that any cache flushing occurs
 666         */
 667        uint32_t pending_read_domains;
 668        uint32_t pending_write_domain;
 669
 670        void *driver_private;
 671
 672        /* dma buf exported from this GEM object */
 673        struct dma_buf *export_dma_buf;
 674
 675        /* dma buf attachment backing this object */
 676        struct dma_buf_attachment *import_attach;
 677};
 678
 679#include <drm/drm_crtc.h>
 680
 681/* per-master structure */
 682struct drm_master {
 683
 684        struct kref refcount; /* refcount for this master */
 685
 686        struct list_head head; /**< each minor contains a list of masters */
 687        struct drm_minor *minor; /**< link back to minor we are a master for */
 688
 689        char *unique;                   /**< Unique identifier: e.g., busid */
 690        int unique_len;                 /**< Length of unique field */
 691        int unique_size;                /**< amount allocated */
 692
 693        int blocked;                    /**< Blocked due to VC switch? */
 694
 695        /** \name Authentication */
 696        /*@{ */
 697        struct drm_open_hash magiclist;
 698        struct list_head magicfree;
 699        /*@} */
 700
 701        struct drm_lock_data lock;      /**< Information on hardware lock */
 702
 703        void *driver_priv; /**< Private structure for driver to use */
 704};
 705
 706/* Size of ringbuffer for vblank timestamps. Just double-buffer
 707 * in initial implementation.
 708 */
 709#define DRM_VBLANKTIME_RBSIZE 2
 710
 711/* Flags and return codes for get_vblank_timestamp() driver function. */
 712#define DRM_CALLED_FROM_VBLIRQ 1
 713#define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
 714#define DRM_VBLANKTIME_INVBL             (1 << 1)
 715
 716/* get_scanout_position() return flags */
 717#define DRM_SCANOUTPOS_VALID        (1 << 0)
 718#define DRM_SCANOUTPOS_INVBL        (1 << 1)
 719#define DRM_SCANOUTPOS_ACCURATE     (1 << 2)
 720
 721struct drm_bus {
 722        int bus_type;
 723        int (*get_irq)(struct drm_device *dev);
 724        const char *(*get_name)(struct drm_device *dev);
 725        int (*set_busid)(struct drm_device *dev, struct drm_master *master);
 726        int (*set_unique)(struct drm_device *dev, struct drm_master *master,
 727                          struct drm_unique *unique);
 728        int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
 729        /* hooks that are for PCI */
 730        int (*agp_init)(struct drm_device *dev);
 731
 732};
 733
 734/**
 735 * DRM driver structure. This structure represent the common code for
 736 * a family of cards. There will one drm_device for each card present
 737 * in this family
 738 */
 739struct drm_driver {
 740        int (*load) (struct drm_device *, unsigned long flags);
 741        int (*firstopen) (struct drm_device *);
 742        int (*open) (struct drm_device *, struct drm_file *);
 743        void (*preclose) (struct drm_device *, struct drm_file *file_priv);
 744        void (*postclose) (struct drm_device *, struct drm_file *);
 745        void (*lastclose) (struct drm_device *);
 746        int (*unload) (struct drm_device *);
 747        int (*suspend) (struct drm_device *, pm_message_t state);
 748        int (*resume) (struct drm_device *);
 749        int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
 750        int (*dma_quiescent) (struct drm_device *);
 751        int (*context_dtor) (struct drm_device *dev, int context);
 752
 753        /**
 754         * get_vblank_counter - get raw hardware vblank counter
 755         * @dev: DRM device
 756         * @crtc: counter to fetch
 757         *
 758         * Driver callback for fetching a raw hardware vblank counter for @crtc.
 759         * If a device doesn't have a hardware counter, the driver can simply
 760         * return the value of drm_vblank_count. The DRM core will account for
 761         * missed vblank events while interrupts where disabled based on system
 762         * timestamps.
 763         *
 764         * Wraparound handling and loss of events due to modesetting is dealt
 765         * with in the DRM core code.
 766         *
 767         * RETURNS
 768         * Raw vblank counter value.
 769         */
 770        u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
 771
 772        /**
 773         * enable_vblank - enable vblank interrupt events
 774         * @dev: DRM device
 775         * @crtc: which irq to enable
 776         *
 777         * Enable vblank interrupts for @crtc.  If the device doesn't have
 778         * a hardware vblank counter, this routine should be a no-op, since
 779         * interrupts will have to stay on to keep the count accurate.
 780         *
 781         * RETURNS
 782         * Zero on success, appropriate errno if the given @crtc's vblank
 783         * interrupt cannot be enabled.
 784         */
 785        int (*enable_vblank) (struct drm_device *dev, int crtc);
 786
 787        /**
 788         * disable_vblank - disable vblank interrupt events
 789         * @dev: DRM device
 790         * @crtc: which irq to enable
 791         *
 792         * Disable vblank interrupts for @crtc.  If the device doesn't have
 793         * a hardware vblank counter, this routine should be a no-op, since
 794         * interrupts will have to stay on to keep the count accurate.
 795         */
 796        void (*disable_vblank) (struct drm_device *dev, int crtc);
 797
 798        /**
 799         * Called by \c drm_device_is_agp.  Typically used to determine if a
 800         * card is really attached to AGP or not.
 801         *
 802         * \param dev  DRM device handle
 803         *
 804         * \returns
 805         * One of three values is returned depending on whether or not the
 806         * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
 807         * (return of 1), or may or may not be AGP (return of 2).
 808         */
 809        int (*device_is_agp) (struct drm_device *dev);
 810
 811        /**
 812         * Called by vblank timestamping code.
 813         *
 814         * Return the current display scanout position from a crtc.
 815         *
 816         * \param dev  DRM device.
 817         * \param crtc Id of the crtc to query.
 818         * \param *vpos Target location for current vertical scanout position.
 819         * \param *hpos Target location for current horizontal scanout position.
 820         *
 821         * Returns vpos as a positive number while in active scanout area.
 822         * Returns vpos as a negative number inside vblank, counting the number
 823         * of scanlines to go until end of vblank, e.g., -1 means "one scanline
 824         * until start of active scanout / end of vblank."
 825         *
 826         * \return Flags, or'ed together as follows:
 827         *
 828         * DRM_SCANOUTPOS_VALID = Query successful.
 829         * DRM_SCANOUTPOS_INVBL = Inside vblank.
 830         * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
 831         * this flag means that returned position may be offset by a constant
 832         * but unknown small number of scanlines wrt. real scanout position.
 833         *
 834         */
 835        int (*get_scanout_position) (struct drm_device *dev, int crtc,
 836                                     int *vpos, int *hpos);
 837
 838        /**
 839         * Called by \c drm_get_last_vbltimestamp. Should return a precise
 840         * timestamp when the most recent VBLANK interval ended or will end.
 841         *
 842         * Specifically, the timestamp in @vblank_time should correspond as
 843         * closely as possible to the time when the first video scanline of
 844         * the video frame after the end of VBLANK will start scanning out,
 845         * the time immediately after end of the VBLANK interval. If the
 846         * @crtc is currently inside VBLANK, this will be a time in the future.
 847         * If the @crtc is currently scanning out a frame, this will be the
 848         * past start time of the current scanout. This is meant to adhere
 849         * to the OpenML OML_sync_control extension specification.
 850         *
 851         * \param dev dev DRM device handle.
 852         * \param crtc crtc for which timestamp should be returned.
 853         * \param *max_error Maximum allowable timestamp error in nanoseconds.
 854         *                   Implementation should strive to provide timestamp
 855         *                   with an error of at most *max_error nanoseconds.
 856         *                   Returns true upper bound on error for timestamp.
 857         * \param *vblank_time Target location for returned vblank timestamp.
 858         * \param flags 0 = Defaults, no special treatment needed.
 859         * \param       DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
 860         *              irq handler. Some drivers need to apply some workarounds
 861         *              for gpu-specific vblank irq quirks if flag is set.
 862         *
 863         * \returns
 864         * Zero if timestamping isn't supported in current display mode or a
 865         * negative number on failure. A positive status code on success,
 866         * which describes how the vblank_time timestamp was computed.
 867         */
 868        int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
 869                                     int *max_error,
 870                                     struct timeval *vblank_time,
 871                                     unsigned flags);
 872
 873        /* these have to be filled in */
 874
 875        irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
 876        void (*irq_preinstall) (struct drm_device *dev);
 877        int (*irq_postinstall) (struct drm_device *dev);
 878        void (*irq_uninstall) (struct drm_device *dev);
 879        void (*set_version) (struct drm_device *dev,
 880                             struct drm_set_version *sv);
 881
 882        /* Master routines */
 883        int (*master_create)(struct drm_device *dev, struct drm_master *master);
 884        void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
 885        /**
 886         * master_set is called whenever the minor master is set.
 887         * master_drop is called whenever the minor master is dropped.
 888         */
 889
 890        int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
 891                          bool from_open);
 892        void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
 893                            bool from_release);
 894
 895        int (*debugfs_init)(struct drm_minor *minor);
 896        void (*debugfs_cleanup)(struct drm_minor *minor);
 897
 898        /**
 899         * Driver-specific constructor for drm_gem_objects, to set up
 900         * obj->driver_private.
 901         *
 902         * Returns 0 on success.
 903         */
 904        int (*gem_init_object) (struct drm_gem_object *obj);
 905        void (*gem_free_object) (struct drm_gem_object *obj);
 906        int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
 907        void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
 908
 909        /* prime: */
 910        /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
 911        int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
 912                                uint32_t handle, uint32_t flags, int *prime_fd);
 913        /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
 914        int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
 915                                int prime_fd, uint32_t *handle);
 916        /* export GEM -> dmabuf */
 917        struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
 918                                struct drm_gem_object *obj, int flags);
 919        /* import dmabuf -> GEM */
 920        struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
 921                                struct dma_buf *dma_buf);
 922
 923        /* vga arb irq handler */
 924        void (*vgaarb_irq)(struct drm_device *dev, bool state);
 925
 926        /* dumb alloc support */
 927        int (*dumb_create)(struct drm_file *file_priv,
 928                           struct drm_device *dev,
 929                           struct drm_mode_create_dumb *args);
 930        int (*dumb_map_offset)(struct drm_file *file_priv,
 931                               struct drm_device *dev, uint32_t handle,
 932                               uint64_t *offset);
 933        int (*dumb_destroy)(struct drm_file *file_priv,
 934                            struct drm_device *dev,
 935                            uint32_t handle);
 936
 937        /* Driver private ops for this object */
 938        const struct vm_operations_struct *gem_vm_ops;
 939
 940        int major;
 941        int minor;
 942        int patchlevel;
 943        char *name;
 944        char *desc;
 945        char *date;
 946
 947        u32 driver_features;
 948        int dev_priv_size;
 949        struct drm_ioctl_desc *ioctls;
 950        int num_ioctls;
 951        const struct file_operations *fops;
 952        union {
 953                struct pci_driver *pci;
 954                struct platform_device *platform_device;
 955                struct usb_driver *usb;
 956        } kdriver;
 957        struct drm_bus *bus;
 958
 959        /* List of devices hanging off this driver */
 960        struct list_head device_list;
 961};
 962
 963#define DRM_MINOR_UNASSIGNED 0
 964#define DRM_MINOR_LEGACY 1
 965#define DRM_MINOR_CONTROL 2
 966#define DRM_MINOR_RENDER 3
 967
 968
 969/**
 970 * debugfs node list. This structure represents a debugfs file to
 971 * be created by the drm core
 972 */
 973struct drm_debugfs_list {
 974        const char *name; /** file name */
 975        int (*show)(struct seq_file*, void*); /** show callback */
 976        u32 driver_features; /**< Required driver features for this entry */
 977};
 978
 979/**
 980 * debugfs node structure. This structure represents a debugfs file.
 981 */
 982struct drm_debugfs_node {
 983        struct list_head list;
 984        struct drm_minor *minor;
 985        struct drm_debugfs_list *debugfs_ent;
 986        struct dentry *dent;
 987};
 988
 989/**
 990 * Info file list entry. This structure represents a debugfs or proc file to
 991 * be created by the drm core
 992 */
 993struct drm_info_list {
 994        const char *name; /** file name */
 995        int (*show)(struct seq_file*, void*); /** show callback */
 996        u32 driver_features; /**< Required driver features for this entry */
 997        void *data;
 998};
 999
1000/**
1001 * debugfs node structure. This structure represents a debugfs file.
1002 */
1003struct drm_info_node {
1004        struct list_head list;
1005        struct drm_minor *minor;
1006        struct drm_info_list *info_ent;
1007        struct dentry *dent;
1008};
1009
1010/**
1011 * DRM minor structure. This structure represents a drm minor number.
1012 */
1013struct drm_minor {
1014        int index;                      /**< Minor device number */
1015        int type;                       /**< Control or render */
1016        dev_t device;                   /**< Device number for mknod */
1017        struct device kdev;             /**< Linux device */
1018        struct drm_device *dev;
1019
1020        struct proc_dir_entry *proc_root;  /**< proc directory entry */
1021        struct drm_info_node proc_nodes;
1022        struct dentry *debugfs_root;
1023
1024        struct list_head debugfs_list;
1025        struct mutex debugfs_lock; /* Protects debugfs_list. */
1026
1027        struct drm_master *master; /* currently active master for this node */
1028        struct list_head master_list;
1029        struct drm_mode_group mode_group;
1030};
1031
1032/* mode specified on the command line */
1033struct drm_cmdline_mode {
1034        bool specified;
1035        bool refresh_specified;
1036        bool bpp_specified;
1037        int xres, yres;
1038        int bpp;
1039        int refresh;
1040        bool rb;
1041        bool interlace;
1042        bool cvt;
1043        bool margins;
1044        enum drm_connector_force force;
1045};
1046
1047
1048struct drm_pending_vblank_event {
1049        struct drm_pending_event base;
1050        int pipe;
1051        struct drm_event_vblank event;
1052};
1053
1054/**
1055 * DRM device structure. This structure represent a complete card that
1056 * may contain multiple heads.
1057 */
1058struct drm_device {
1059        struct list_head driver_item;   /**< list of devices per driver */
1060        char *devname;                  /**< For /proc/interrupts */
1061        int if_version;                 /**< Highest interface version set */
1062
1063        /** \name Locks */
1064        /*@{ */
1065        spinlock_t count_lock;          /**< For inuse, drm_device::open_count, drm_device::buf_use */
1066        struct mutex struct_mutex;      /**< For others */
1067        /*@} */
1068
1069        /** \name Usage Counters */
1070        /*@{ */
1071        int open_count;                 /**< Outstanding files open */
1072        atomic_t ioctl_count;           /**< Outstanding IOCTLs pending */
1073        atomic_t vma_count;             /**< Outstanding vma areas open */
1074        int buf_use;                    /**< Buffers in use -- cannot alloc */
1075        atomic_t buf_alloc;             /**< Buffer allocation in progress */
1076        /*@} */
1077
1078        /** \name Performance counters */
1079        /*@{ */
1080        unsigned long counters;
1081        enum drm_stat_type types[15];
1082        atomic_t counts[15];
1083        /*@} */
1084
1085        struct list_head filelist;
1086
1087        /** \name Memory management */
1088        /*@{ */
1089        struct list_head maplist;       /**< Linked list of regions */
1090        int map_count;                  /**< Number of mappable regions */
1091        struct drm_open_hash map_hash;  /**< User token hash table for maps */
1092
1093        /** \name Context handle management */
1094        /*@{ */
1095        struct list_head ctxlist;       /**< Linked list of context handles */
1096        int ctx_count;                  /**< Number of context handles */
1097        struct mutex ctxlist_mutex;     /**< For ctxlist */
1098
1099        struct idr ctx_idr;
1100
1101        struct list_head vmalist;       /**< List of vmas (for debugging) */
1102
1103        /*@} */
1104
1105        /** \name DMA support */
1106        /*@{ */
1107        struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
1108        /*@} */
1109
1110        /** \name Context support */
1111        /*@{ */
1112        int irq_enabled;                /**< True if irq handler is enabled */
1113        __volatile__ long context_flag; /**< Context swapping flag */
1114        __volatile__ long interrupt_flag; /**< Interruption handler flag */
1115        __volatile__ long dma_flag;     /**< DMA dispatch flag */
1116        wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
1117        int last_checked;               /**< Last context checked for DMA */
1118        int last_context;               /**< Last current context */
1119        unsigned long last_switch;      /**< jiffies at last context switch */
1120        /*@} */
1121
1122        struct work_struct work;
1123        /** \name VBLANK IRQ support */
1124        /*@{ */
1125
1126        /*
1127         * At load time, disabling the vblank interrupt won't be allowed since
1128         * old clients may not call the modeset ioctl and therefore misbehave.
1129         * Once the modeset ioctl *has* been called though, we can safely
1130         * disable them when unused.
1131         */
1132        int vblank_disable_allowed;
1133
1134        wait_queue_head_t *vbl_queue;   /**< VBLANK wait queue */
1135        atomic_t *_vblank_count;        /**< number of VBLANK interrupts (driver must alloc the right number of counters) */
1136        struct timeval *_vblank_time;   /**< timestamp of current vblank_count (drivers must alloc right number of fields) */
1137        spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
1138        spinlock_t vbl_lock;
1139        atomic_t *vblank_refcount;      /* number of users of vblank interruptsper crtc */
1140        u32 *last_vblank;               /* protected by dev->vbl_lock, used */
1141                                        /* for wraparound handling */
1142        int *vblank_enabled;            /* so we don't call enable more than
1143                                           once per disable */
1144        int *vblank_inmodeset;          /* Display driver is setting mode */
1145        u32 *last_vblank_wait;          /* Last vblank seqno waited per CRTC */
1146        struct timer_list vblank_disable_timer;
1147
1148        u32 max_vblank_count;           /**< size of vblank counter register */
1149
1150        /**
1151         * List of events
1152         */
1153        struct list_head vblank_event_list;
1154        spinlock_t event_lock;
1155
1156        /*@} */
1157        cycles_t ctx_start;
1158        cycles_t lck_start;
1159
1160        struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */
1161        wait_queue_head_t buf_readers;  /**< Processes waiting to read */
1162        wait_queue_head_t buf_writers;  /**< Processes waiting to ctx switch */
1163
1164        struct drm_agp_head *agp;       /**< AGP data */
1165
1166        struct device *dev;             /**< Device structure */
1167        struct pci_dev *pdev;           /**< PCI device structure */
1168        int pci_vendor;                 /**< PCI vendor id */
1169        int pci_device;                 /**< PCI device id */
1170#ifdef __alpha__
1171        struct pci_controller *hose;
1172#endif
1173
1174        struct platform_device *platformdev; /**< Platform device struture */
1175        struct usb_device *usbdev;
1176
1177        struct drm_sg_mem *sg;  /**< Scatter gather memory */
1178        unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
1179        void *dev_private;              /**< device private data */
1180        void *mm_private;
1181        struct address_space *dev_mapping;
1182        struct drm_sigdata sigdata;        /**< For block_all_signals */
1183        sigset_t sigmask;
1184
1185        struct drm_driver *driver;
1186        struct drm_local_map *agp_buffer_map;
1187        unsigned int agp_buffer_token;
1188        struct drm_minor *control;              /**< Control node for card */
1189        struct drm_minor *primary;              /**< render type primary screen head */
1190
1191        struct drm_mode_config mode_config;     /**< Current mode config */
1192
1193        /** \name GEM information */
1194        /*@{ */
1195        spinlock_t object_name_lock;
1196        struct idr object_name_idr;
1197        /*@} */
1198        int switch_power_state;
1199
1200        atomic_t unplugged; /* device has been unplugged or gone away */
1201};
1202
1203#define DRM_SWITCH_POWER_ON 0
1204#define DRM_SWITCH_POWER_OFF 1
1205#define DRM_SWITCH_POWER_CHANGING 2
1206
1207static __inline__ int drm_core_check_feature(struct drm_device *dev,
1208                                             int feature)
1209{
1210        return ((dev->driver->driver_features & feature) ? 1 : 0);
1211}
1212
1213static inline int drm_dev_to_irq(struct drm_device *dev)
1214{
1215        return dev->driver->bus->get_irq(dev);
1216}
1217
1218
1219#if __OS_HAS_AGP
1220static inline int drm_core_has_AGP(struct drm_device *dev)
1221{
1222        return drm_core_check_feature(dev, DRIVER_USE_AGP);
1223}
1224#else
1225#define drm_core_has_AGP(dev) (0)
1226#endif
1227
1228#if __OS_HAS_MTRR
1229static inline int drm_core_has_MTRR(struct drm_device *dev)
1230{
1231        return drm_core_check_feature(dev, DRIVER_USE_MTRR);
1232}
1233
1234#define DRM_MTRR_WC             MTRR_TYPE_WRCOMB
1235
1236static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1237                               unsigned int flags)
1238{
1239        return mtrr_add(offset, size, flags, 1);
1240}
1241
1242static inline int drm_mtrr_del(int handle, unsigned long offset,
1243                               unsigned long size, unsigned int flags)
1244{
1245        return mtrr_del(handle, offset, size);
1246}
1247
1248#else
1249#define drm_core_has_MTRR(dev) (0)
1250
1251#define DRM_MTRR_WC             0
1252
1253static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
1254                               unsigned int flags)
1255{
1256        return 0;
1257}
1258
1259static inline int drm_mtrr_del(int handle, unsigned long offset,
1260                               unsigned long size, unsigned int flags)
1261{
1262        return 0;
1263}
1264#endif
1265
1266static inline void drm_device_set_unplugged(struct drm_device *dev)
1267{
1268        smp_wmb();
1269        atomic_set(&dev->unplugged, 1);
1270}
1271
1272static inline int drm_device_is_unplugged(struct drm_device *dev)
1273{
1274        int ret = atomic_read(&dev->unplugged);
1275        smp_rmb();
1276        return ret;
1277}
1278
1279/******************************************************************/
1280/** \name Internal function definitions */
1281/*@{*/
1282
1283                                /* Driver support (drm_drv.h) */
1284extern long drm_ioctl(struct file *filp,
1285                      unsigned int cmd, unsigned long arg);
1286extern long drm_compat_ioctl(struct file *filp,
1287                             unsigned int cmd, unsigned long arg);
1288extern int drm_lastclose(struct drm_device *dev);
1289
1290                                /* Device support (drm_fops.h) */
1291extern struct mutex drm_global_mutex;
1292extern int drm_open(struct inode *inode, struct file *filp);
1293extern int drm_stub_open(struct inode *inode, struct file *filp);
1294extern int drm_fasync(int fd, struct file *filp, int on);
1295extern ssize_t drm_read(struct file *filp, char __user *buffer,
1296                        size_t count, loff_t *offset);
1297extern int drm_release(struct inode *inode, struct file *filp);
1298
1299                                /* Mapping support (drm_vm.h) */
1300extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1301extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1302extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1303extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1304extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1305
1306                                /* Memory management support (drm_memory.h) */
1307#include <drm/drm_memory.h>
1308extern void drm_free_agp(DRM_AGP_MEM * handle, int pages);
1309extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
1310extern DRM_AGP_MEM *drm_agp_bind_pages(struct drm_device *dev,
1311                                       struct page **pages,
1312                                       unsigned long num_pages,
1313                                       uint32_t gtt_offset,
1314                                       uint32_t type);
1315extern int drm_unbind_agp(DRM_AGP_MEM * handle);
1316
1317                                /* Misc. IOCTL support (drm_ioctl.h) */
1318extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1319                            struct drm_file *file_priv);
1320extern int drm_getunique(struct drm_device *dev, void *data,
1321                         struct drm_file *file_priv);
1322extern int drm_setunique(struct drm_device *dev, void *data,
1323                         struct drm_file *file_priv);
1324extern int drm_getmap(struct drm_device *dev, void *data,
1325                      struct drm_file *file_priv);
1326extern int drm_getclient(struct drm_device *dev, void *data,
1327                         struct drm_file *file_priv);
1328extern int drm_getstats(struct drm_device *dev, void *data,
1329                        struct drm_file *file_priv);
1330extern int drm_getcap(struct drm_device *dev, void *data,
1331                      struct drm_file *file_priv);
1332extern int drm_setversion(struct drm_device *dev, void *data,
1333                          struct drm_file *file_priv);
1334extern int drm_noop(struct drm_device *dev, void *data,
1335                    struct drm_file *file_priv);
1336
1337                                /* Context IOCTL support (drm_context.h) */
1338extern int drm_resctx(struct drm_device *dev, void *data,
1339                      struct drm_file *file_priv);
1340extern int drm_addctx(struct drm_device *dev, void *data,
1341                      struct drm_file *file_priv);
1342extern int drm_modctx(struct drm_device *dev, void *data,
1343                      struct drm_file *file_priv);
1344extern int drm_getctx(struct drm_device *dev, void *data,
1345                      struct drm_file *file_priv);
1346extern int drm_switchctx(struct drm_device *dev, void *data,
1347                         struct drm_file *file_priv);
1348extern int drm_newctx(struct drm_device *dev, void *data,
1349                      struct drm_file *file_priv);
1350extern int drm_rmctx(struct drm_device *dev, void *data,
1351                     struct drm_file *file_priv);
1352
1353extern int drm_ctxbitmap_init(struct drm_device *dev);
1354extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1355extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1356
1357extern int drm_setsareactx(struct drm_device *dev, void *data,
1358                           struct drm_file *file_priv);
1359extern int drm_getsareactx(struct drm_device *dev, void *data,
1360                           struct drm_file *file_priv);
1361
1362                                /* Authentication IOCTL support (drm_auth.h) */
1363extern int drm_getmagic(struct drm_device *dev, void *data,
1364                        struct drm_file *file_priv);
1365extern int drm_authmagic(struct drm_device *dev, void *data,
1366                         struct drm_file *file_priv);
1367extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1368
1369/* Cache management (drm_cache.c) */
1370void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1371void drm_clflush_sg(struct sg_table *st);
1372void drm_clflush_virt_range(char *addr, unsigned long length);
1373
1374                                /* Locking IOCTL support (drm_lock.h) */
1375extern int drm_lock(struct drm_device *dev, void *data,
1376                    struct drm_file *file_priv);
1377extern int drm_unlock(struct drm_device *dev, void *data,
1378                      struct drm_file *file_priv);
1379extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1380extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1381extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1382
1383/*
1384 * These are exported to drivers so that they can implement fencing using
1385 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1386 */
1387
1388extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1389
1390                                /* Buffer management support (drm_bufs.h) */
1391extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1392extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1393extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1394                      unsigned int size, enum drm_map_type type,
1395                      enum drm_map_flags flags, struct drm_local_map **map_ptr);
1396extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1397                            struct drm_file *file_priv);
1398extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1399extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1400extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1401                           struct drm_file *file_priv);
1402extern int drm_addbufs(struct drm_device *dev, void *data,
1403                       struct drm_file *file_priv);
1404extern int drm_infobufs(struct drm_device *dev, void *data,
1405                        struct drm_file *file_priv);
1406extern int drm_markbufs(struct drm_device *dev, void *data,
1407                        struct drm_file *file_priv);
1408extern int drm_freebufs(struct drm_device *dev, void *data,
1409                        struct drm_file *file_priv);
1410extern int drm_mapbufs(struct drm_device *dev, void *data,
1411                       struct drm_file *file_priv);
1412extern int drm_order(unsigned long size);
1413
1414                                /* DMA support (drm_dma.h) */
1415extern int drm_dma_setup(struct drm_device *dev);
1416extern void drm_dma_takedown(struct drm_device *dev);
1417extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1418extern void drm_core_reclaim_buffers(struct drm_device *dev,
1419                                     struct drm_file *filp);
1420
1421                                /* IRQ support (drm_irq.h) */
1422extern int drm_control(struct drm_device *dev, void *data,
1423                       struct drm_file *file_priv);
1424extern int drm_irq_install(struct drm_device *dev);
1425extern int drm_irq_uninstall(struct drm_device *dev);
1426
1427extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1428extern int drm_wait_vblank(struct drm_device *dev, void *data,
1429                           struct drm_file *filp);
1430extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
1431extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1432extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1433                                     struct timeval *vblanktime);
1434extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1435extern int drm_vblank_get(struct drm_device *dev, int crtc);
1436extern void drm_vblank_put(struct drm_device *dev, int crtc);
1437extern void drm_vblank_off(struct drm_device *dev, int crtc);
1438extern void drm_vblank_cleanup(struct drm_device *dev);
1439extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1440                                     struct timeval *tvblank, unsigned flags);
1441extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1442                                                 int crtc, int *max_error,
1443                                                 struct timeval *vblank_time,
1444                                                 unsigned flags,
1445                                                 struct drm_crtc *refcrtc);
1446extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);
1447
1448extern bool
1449drm_mode_parse_command_line_for_connector(const char *mode_option,
1450                                          struct drm_connector *connector,
1451                                          struct drm_cmdline_mode *mode);
1452
1453extern struct drm_display_mode *
1454drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1455                                  struct drm_cmdline_mode *cmd);
1456
1457/* Modesetting support */
1458extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1459extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1460extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1461                           struct drm_file *file_priv);
1462
1463                                /* AGP/GART support (drm_agpsupport.h) */
1464extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
1465extern int drm_agp_acquire(struct drm_device *dev);
1466extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
1467                                 struct drm_file *file_priv);
1468extern int drm_agp_release(struct drm_device *dev);
1469extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
1470                                 struct drm_file *file_priv);
1471extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1472extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
1473                                struct drm_file *file_priv);
1474extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
1475extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
1476                        struct drm_file *file_priv);
1477extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1478extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
1479                         struct drm_file *file_priv);
1480extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1481extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
1482                        struct drm_file *file_priv);
1483extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1484extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
1485                          struct drm_file *file_priv);
1486extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1487extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
1488                        struct drm_file *file_priv);
1489
1490                                /* Stub support (drm_stub.h) */
1491extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1492                               struct drm_file *file_priv);
1493extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1494                                struct drm_file *file_priv);
1495struct drm_master *drm_master_create(struct drm_minor *minor);
1496extern struct drm_master *drm_master_get(struct drm_master *master);
1497extern void drm_master_put(struct drm_master **master);
1498
1499extern void drm_put_dev(struct drm_device *dev);
1500extern int drm_put_minor(struct drm_minor **minor);
1501extern void drm_unplug_dev(struct drm_device *dev);
1502extern unsigned int drm_debug;
1503
1504extern unsigned int drm_vblank_offdelay;
1505extern unsigned int drm_timestamp_precision;
1506
1507extern struct class *drm_class;
1508extern struct proc_dir_entry *drm_proc_root;
1509extern struct dentry *drm_debugfs_root;
1510
1511extern struct idr drm_minors_idr;
1512
1513extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1514
1515                                /* Proc support (drm_proc.h) */
1516extern int drm_proc_init(struct drm_minor *minor, int minor_id,
1517                         struct proc_dir_entry *root);
1518extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);
1519
1520                                /* Debugfs support */
1521#if defined(CONFIG_DEBUG_FS)
1522extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1523                            struct dentry *root);
1524extern int drm_debugfs_create_files(struct drm_info_list *files, int count,
1525                                    struct dentry *root, struct drm_minor *minor);
1526extern int drm_debugfs_remove_files(struct drm_info_list *files, int count,
1527                                    struct drm_minor *minor);
1528extern int drm_debugfs_cleanup(struct drm_minor *minor);
1529#endif
1530
1531                                /* Info file support */
1532extern int drm_name_info(struct seq_file *m, void *data);
1533extern int drm_vm_info(struct seq_file *m, void *data);
1534extern int drm_bufs_info(struct seq_file *m, void *data);
1535extern int drm_vblank_info(struct seq_file *m, void *data);
1536extern int drm_clients_info(struct seq_file *m, void* data);
1537extern int drm_gem_name_info(struct seq_file *m, void *data);
1538
1539
1540extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1541                struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1542                int *prime_fd);
1543extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1544                struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1545
1546extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1547                                        struct drm_file *file_priv);
1548extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1549                                        struct drm_file *file_priv);
1550
1551extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1552                                            dma_addr_t *addrs, int max_pages);
1553extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1554extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1555
1556
1557void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1558void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1559int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
1560int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
1561void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1562
1563int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
1564int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
1565                         struct drm_gem_object **obj);
1566
1567#if DRM_DEBUG_CODE
1568extern int drm_vma_info(struct seq_file *m, void *data);
1569#endif
1570
1571                                /* Scatter Gather Support (drm_scatter.h) */
1572extern void drm_sg_cleanup(struct drm_sg_mem * entry);
1573extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1574                        struct drm_file *file_priv);
1575extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
1576extern int drm_sg_free(struct drm_device *dev, void *data,
1577                       struct drm_file *file_priv);
1578
1579                               /* ATI PCIGART support (ati_pcigart.h) */
1580extern int drm_ati_pcigart_init(struct drm_device *dev,
1581                                struct drm_ati_pcigart_info * gart_info);
1582extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1583                                   struct drm_ati_pcigart_info * gart_info);
1584
1585extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1586                                       size_t align);
1587extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1588extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1589
1590                               /* sysfs support (drm_sysfs.c) */
1591struct drm_sysfs_class;
1592extern struct class *drm_sysfs_create(struct module *owner, char *name);
1593extern void drm_sysfs_destroy(void);
1594extern int drm_sysfs_device_add(struct drm_minor *minor);
1595extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1596extern void drm_sysfs_device_remove(struct drm_minor *minor);
1597extern char *drm_get_connector_status_name(enum drm_connector_status status);
1598extern int drm_sysfs_connector_add(struct drm_connector *connector);
1599extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1600
1601/* Graphics Execution Manager library functions (drm_gem.c) */
1602int drm_gem_init(struct drm_device *dev);
1603void drm_gem_destroy(struct drm_device *dev);
1604void drm_gem_object_release(struct drm_gem_object *obj);
1605void drm_gem_object_free(struct kref *kref);
1606struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
1607                                            size_t size);
1608int drm_gem_object_init(struct drm_device *dev,
1609                        struct drm_gem_object *obj, size_t size);
1610int drm_gem_private_object_init(struct drm_device *dev,
1611                        struct drm_gem_object *obj, size_t size);
1612void drm_gem_object_handle_free(struct drm_gem_object *obj);
1613void drm_gem_vm_open(struct vm_area_struct *vma);
1614void drm_gem_vm_close(struct vm_area_struct *vma);
1615int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1616
1617#include <drm/drm_global.h>
1618
1619static inline void
1620drm_gem_object_reference(struct drm_gem_object *obj)
1621{
1622        kref_get(&obj->refcount);
1623}
1624
1625static inline void
1626drm_gem_object_unreference(struct drm_gem_object *obj)
1627{
1628        if (obj != NULL)
1629                kref_put(&obj->refcount, drm_gem_object_free);
1630}
1631
1632static inline void
1633drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1634{
1635        if (obj != NULL) {
1636                struct drm_device *dev = obj->dev;
1637                mutex_lock(&dev->struct_mutex);
1638                kref_put(&obj->refcount, drm_gem_object_free);
1639                mutex_unlock(&dev->struct_mutex);
1640        }
1641}
1642
1643int drm_gem_handle_create(struct drm_file *file_priv,
1644                          struct drm_gem_object *obj,
1645                          u32 *handlep);
1646int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1647
1648static inline void
1649drm_gem_object_handle_reference(struct drm_gem_object *obj)
1650{
1651        drm_gem_object_reference(obj);
1652        atomic_inc(&obj->handle_count);
1653}
1654
1655static inline void
1656drm_gem_object_handle_unreference(struct drm_gem_object *obj)
1657{
1658        if (obj == NULL)
1659                return;
1660
1661        if (atomic_read(&obj->handle_count) == 0)
1662                return;
1663        /*
1664         * Must bump handle count first as this may be the last
1665         * ref, in which case the object would disappear before we
1666         * checked for a name
1667         */
1668        if (atomic_dec_and_test(&obj->handle_count))
1669                drm_gem_object_handle_free(obj);
1670        drm_gem_object_unreference(obj);
1671}
1672
1673static inline void
1674drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
1675{
1676        if (obj == NULL)
1677                return;
1678
1679        if (atomic_read(&obj->handle_count) == 0)
1680                return;
1681
1682        /*
1683        * Must bump handle count first as this may be the last
1684        * ref, in which case the object would disappear before we
1685        * checked for a name
1686        */
1687
1688        if (atomic_dec_and_test(&obj->handle_count))
1689                drm_gem_object_handle_free(obj);
1690        drm_gem_object_unreference_unlocked(obj);
1691}
1692
1693void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1694int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1695
1696struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1697                                             struct drm_file *filp,
1698                                             u32 handle);
1699int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1700                        struct drm_file *file_priv);
1701int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1702                        struct drm_file *file_priv);
1703int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1704                       struct drm_file *file_priv);
1705void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1706void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1707
1708extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1709extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1710extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1711
1712static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1713                                                         unsigned int token)
1714{
1715        struct drm_map_list *_entry;
1716        list_for_each_entry(_entry, &dev->maplist, head)
1717            if (_entry->user_token == token)
1718                return _entry->map;
1719        return NULL;
1720}
1721
1722static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1723{
1724}
1725
1726#include <drm/drm_mem_util.h>
1727
1728extern int drm_fill_in_dev(struct drm_device *dev,
1729                           const struct pci_device_id *ent,
1730                           struct drm_driver *driver);
1731int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
1732/*@}*/
1733
1734/* PCI section */
1735static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1736{
1737        if (dev->driver->device_is_agp != NULL) {
1738                int err = (*dev->driver->device_is_agp) (dev);
1739
1740                if (err != 2) {
1741                        return err;
1742                }
1743        }
1744
1745        return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1746}
1747
1748extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1749extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1750extern int drm_get_pci_dev(struct pci_dev *pdev,
1751                           const struct pci_device_id *ent,
1752                           struct drm_driver *driver);
1753
1754#define DRM_PCIE_SPEED_25 1
1755#define DRM_PCIE_SPEED_50 2
1756#define DRM_PCIE_SPEED_80 4
1757
1758extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1759
1760/* platform section */
1761extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1762extern void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device);
1763
1764extern int drm_get_platform_dev(struct platform_device *pdev,
1765                                struct drm_driver *driver);
1766
1767/* returns true if currently okay to sleep */
1768static __inline__ bool drm_can_sleep(void)
1769{
1770        if (in_atomic() || in_dbg_master() || irqs_disabled())
1771                return false;
1772        return true;
1773}
1774
1775#endif                          /* __KERNEL__ */
1776#endif
1777
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