linux/include/drm/drmP.h
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   1/**
   2 * \file drmP.h
   3 * Private header for Direct Rendering Manager
   4 *
   5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
   6 * \author Gareth Hughes <gareth@valinux.com>
   7 */
   8
   9/*
  10 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  12 * All rights reserved.
  13 *
  14 * Permission is hereby granted, free of charge, to any person obtaining a
  15 * copy of this software and associated documentation files (the "Software"),
  16 * to deal in the Software without restriction, including without limitation
  17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18 * and/or sell copies of the Software, and to permit persons to whom the
  19 * Software is furnished to do so, subject to the following conditions:
  20 *
  21 * The above copyright notice and this permission notice (including the next
  22 * paragraph) shall be included in all copies or substantial portions of the
  23 * Software.
  24 *
  25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  28 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  31 * OTHER DEALINGS IN THE SOFTWARE.
  32 */
  33
  34#ifndef _DRM_P_H_
  35#define _DRM_P_H_
  36
  37/* If you want the memory alloc debug functionality, change define below */
  38/* #define DEBUG_MEMORY */
  39
  40#ifdef __KERNEL__
  41#ifdef __alpha__
  42/* add include of current.h so that "current" is defined
  43 * before static inline funcs in wait.h. Doing this so we
  44 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
  45#include <asm/current.h>
  46#endif                          /* __alpha__ */
  47#include <linux/module.h>
  48#include <linux/kernel.h>
  49#include <linux/miscdevice.h>
  50#include <linux/fs.h>
  51#include <linux/proc_fs.h>
  52#include <linux/init.h>
  53#include <linux/file.h>
  54#include <linux/pci.h>
  55#include <linux/jiffies.h>
  56#include <linux/smp_lock.h>     /* For (un)lock_kernel */
  57#include <linux/dma-mapping.h>
  58#include <linux/mm.h>
  59#include <linux/cdev.h>
  60#include <linux/mutex.h>
  61#if defined(__alpha__) || defined(__powerpc__)
  62#include <asm/pgtable.h>        /* For pte_wrprotect */
  63#endif
  64#include <asm/io.h>
  65#include <asm/mman.h>
  66#include <asm/uaccess.h>
  67#ifdef CONFIG_MTRR
  68#include <asm/mtrr.h>
  69#endif
  70#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
  71#include <linux/types.h>
  72#include <linux/agp_backend.h>
  73#endif
  74#include <linux/workqueue.h>
  75#include <linux/poll.h>
  76#include <asm/pgalloc.h>
  77#include "drm.h"
  78
  79#include <linux/idr.h>
  80
  81#define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
  82#define __OS_HAS_MTRR (defined(CONFIG_MTRR))
  83
  84struct drm_file;
  85struct drm_device;
  86
  87#include "drm_os_linux.h"
  88#include "drm_hashtab.h"
  89
  90/***********************************************************************/
  91/** \name DRM template customization defaults */
  92/*@{*/
  93
  94/* driver capabilities and requirements mask */
  95#define DRIVER_USE_AGP     0x1
  96#define DRIVER_REQUIRE_AGP 0x2
  97#define DRIVER_USE_MTRR    0x4
  98#define DRIVER_PCI_DMA     0x8
  99#define DRIVER_SG          0x10
 100#define DRIVER_HAVE_DMA    0x20
 101#define DRIVER_HAVE_IRQ    0x40
 102#define DRIVER_IRQ_SHARED  0x80
 103#define DRIVER_IRQ_VBL     0x100
 104#define DRIVER_DMA_QUEUE   0x200
 105#define DRIVER_FB_DMA      0x400
 106#define DRIVER_IRQ_VBL2    0x800
 107#define DRIVER_GEM         0x1000
 108
 109/***********************************************************************/
 110/** \name Begin the DRM... */
 111/*@{*/
 112
 113#define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
 114                                     also include looping detection. */
 115
 116#define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
 117#define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
 118#define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
 119#define DRM_LOOPING_LIMIT     5000000
 120#define DRM_TIME_SLICE        (HZ/20)  /**< Time slice for GLXContexts */
 121#define DRM_LOCK_SLICE        1 /**< Time slice for lock, in jiffies */
 122
 123#define DRM_FLAG_DEBUG    0x01
 124
 125#define DRM_MEM_DMA        0
 126#define DRM_MEM_SAREA      1
 127#define DRM_MEM_DRIVER     2
 128#define DRM_MEM_MAGIC      3
 129#define DRM_MEM_IOCTLS     4
 130#define DRM_MEM_MAPS       5
 131#define DRM_MEM_VMAS       6
 132#define DRM_MEM_BUFS       7
 133#define DRM_MEM_SEGS       8
 134#define DRM_MEM_PAGES      9
 135#define DRM_MEM_FILES     10
 136#define DRM_MEM_QUEUES    11
 137#define DRM_MEM_CMDS      12
 138#define DRM_MEM_MAPPINGS  13
 139#define DRM_MEM_BUFLISTS  14
 140#define DRM_MEM_AGPLISTS  15
 141#define DRM_MEM_TOTALAGP  16
 142#define DRM_MEM_BOUNDAGP  17
 143#define DRM_MEM_CTXBITMAP 18
 144#define DRM_MEM_STUB      19
 145#define DRM_MEM_SGLISTS   20
 146#define DRM_MEM_CTXLIST   21
 147#define DRM_MEM_MM        22
 148#define DRM_MEM_HASHTAB   23
 149
 150#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
 151#define DRM_MAP_HASH_OFFSET 0x10000000
 152
 153/*@}*/
 154
 155/***********************************************************************/
 156/** \name Macros to make printk easier */
 157/*@{*/
 158
 159/**
 160 * Error output.
 161 *
 162 * \param fmt printf() like format string.
 163 * \param arg arguments
 164 */
 165#define DRM_ERROR(fmt, arg...) \
 166        printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __func__ , ##arg)
 167
 168/**
 169 * Memory error output.
 170 *
 171 * \param area memory area where the error occurred.
 172 * \param fmt printf() like format string.
 173 * \param arg arguments
 174 */
 175#define DRM_MEM_ERROR(area, fmt, arg...) \
 176        printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __func__, \
 177               drm_mem_stats[area].name , ##arg)
 178
 179#define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)
 180
 181/**
 182 * Debug output.
 183 *
 184 * \param fmt printf() like format string.
 185 * \param arg arguments
 186 */
 187#if DRM_DEBUG_CODE
 188#define DRM_DEBUG(fmt, arg...)                                          \
 189        do {                                                            \
 190                if ( drm_debug )                        \
 191                        printk(KERN_DEBUG                               \
 192                               "[" DRM_NAME ":%s] " fmt ,       \
 193                               __func__ , ##arg);                       \
 194        } while (0)
 195#else
 196#define DRM_DEBUG(fmt, arg...)           do { } while (0)
 197#endif
 198
 199#define DRM_PROC_LIMIT (PAGE_SIZE-80)
 200
 201#define DRM_PROC_PRINT(fmt, arg...)                                     \
 202   len += sprintf(&buf[len], fmt , ##arg);                              \
 203   if (len > DRM_PROC_LIMIT) { *eof = 1; return len - offset; }
 204
 205#define DRM_PROC_PRINT_RET(ret, fmt, arg...)                            \
 206   len += sprintf(&buf[len], fmt , ##arg);                              \
 207   if (len > DRM_PROC_LIMIT) { ret; *eof = 1; return len - offset; }
 208
 209/*@}*/
 210
 211/***********************************************************************/
 212/** \name Internal types and structures */
 213/*@{*/
 214
 215#define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
 216
 217#define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
 218#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
 219#define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)
 220
 221#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 222/**
 223 * Get the private SAREA mapping.
 224 *
 225 * \param _dev DRM device.
 226 * \param _ctx context number.
 227 * \param _map output mapping.
 228 */
 229#define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {       \
 230        (_map) = (_dev)->context_sareas[_ctx];          \
 231} while(0)
 232
 233/**
 234 * Test that the hardware lock is held by the caller, returning otherwise.
 235 *
 236 * \param dev DRM device.
 237 * \param filp file pointer of the caller.
 238 */
 239#define LOCK_TEST_WITH_RETURN( dev, file_priv )                         \
 240do {                                                                    \
 241        if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) ||           \
 242             dev->lock.file_priv != file_priv ) {                       \
 243                DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
 244                           __func__, _DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ),\
 245                           dev->lock.file_priv, file_priv );            \
 246                return -EINVAL;                                         \
 247        }                                                               \
 248} while (0)
 249
 250/**
 251 * Copy and IOCTL return string to user space
 252 */
 253#define DRM_COPY( name, value )                                         \
 254        len = strlen( value );                                          \
 255        if ( len > name##_len ) len = name##_len;                       \
 256        name##_len = strlen( value );                                   \
 257        if ( len && name ) {                                            \
 258                if ( copy_to_user( name, value, len ) )                 \
 259                        return -EFAULT;                                 \
 260        }
 261
 262/**
 263 * Ioctl function type.
 264 *
 265 * \param inode device inode.
 266 * \param file_priv DRM file private pointer.
 267 * \param cmd command.
 268 * \param arg argument.
 269 */
 270typedef int drm_ioctl_t(struct drm_device *dev, void *data,
 271                        struct drm_file *file_priv);
 272
 273typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
 274                               unsigned long arg);
 275
 276#define DRM_AUTH        0x1
 277#define DRM_MASTER      0x2
 278#define DRM_ROOT_ONLY   0x4
 279
 280struct drm_ioctl_desc {
 281        unsigned int cmd;
 282        drm_ioctl_t *func;
 283        int flags;
 284};
 285
 286/**
 287 * Creates a driver or general drm_ioctl_desc array entry for the given
 288 * ioctl, for use by drm_ioctl().
 289 */
 290#define DRM_IOCTL_DEF(ioctl, func, flags) \
 291        [DRM_IOCTL_NR(ioctl)] = {ioctl, func, flags}
 292
 293struct drm_magic_entry {
 294        struct list_head head;
 295        struct drm_hash_item hash_item;
 296        struct drm_file *priv;
 297};
 298
 299struct drm_vma_entry {
 300        struct list_head head;
 301        struct vm_area_struct *vma;
 302        pid_t pid;
 303};
 304
 305/**
 306 * DMA buffer.
 307 */
 308struct drm_buf {
 309        int idx;                       /**< Index into master buflist */
 310        int total;                     /**< Buffer size */
 311        int order;                     /**< log-base-2(total) */
 312        int used;                      /**< Amount of buffer in use (for DMA) */
 313        unsigned long offset;          /**< Byte offset (used internally) */
 314        void *address;                 /**< Address of buffer */
 315        unsigned long bus_address;     /**< Bus address of buffer */
 316        struct drm_buf *next;          /**< Kernel-only: used for free list */
 317        __volatile__ int waiting;      /**< On kernel DMA queue */
 318        __volatile__ int pending;      /**< On hardware DMA queue */
 319        wait_queue_head_t dma_wait;    /**< Processes waiting */
 320        struct drm_file *file_priv;    /**< Private of holding file descr */
 321        int context;                   /**< Kernel queue for this buffer */
 322        int while_locked;              /**< Dispatch this buffer while locked */
 323        enum {
 324                DRM_LIST_NONE = 0,
 325                DRM_LIST_FREE = 1,
 326                DRM_LIST_WAIT = 2,
 327                DRM_LIST_PEND = 3,
 328                DRM_LIST_PRIO = 4,
 329                DRM_LIST_RECLAIM = 5
 330        } list;                        /**< Which list we're on */
 331
 332        int dev_priv_size;               /**< Size of buffer private storage */
 333        void *dev_private;               /**< Per-buffer private storage */
 334};
 335
 336/** bufs is one longer than it has to be */
 337struct drm_waitlist {
 338        int count;                      /**< Number of possible buffers */
 339        struct drm_buf **bufs;          /**< List of pointers to buffers */
 340        struct drm_buf **rp;                    /**< Read pointer */
 341        struct drm_buf **wp;                    /**< Write pointer */
 342        struct drm_buf **end;           /**< End pointer */
 343        spinlock_t read_lock;
 344        spinlock_t write_lock;
 345};
 346
 347struct drm_freelist {
 348        int initialized;               /**< Freelist in use */
 349        atomic_t count;                /**< Number of free buffers */
 350        struct drm_buf *next;          /**< End pointer */
 351
 352        wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
 353        int low_mark;                  /**< Low water mark */
 354        int high_mark;                 /**< High water mark */
 355        atomic_t wfh;                  /**< If waiting for high mark */
 356        spinlock_t lock;
 357};
 358
 359typedef struct drm_dma_handle {
 360        dma_addr_t busaddr;
 361        void *vaddr;
 362        size_t size;
 363} drm_dma_handle_t;
 364
 365/**
 366 * Buffer entry.  There is one of this for each buffer size order.
 367 */
 368struct drm_buf_entry {
 369        int buf_size;                   /**< size */
 370        int buf_count;                  /**< number of buffers */
 371        struct drm_buf *buflist;                /**< buffer list */
 372        int seg_count;
 373        int page_order;
 374        struct drm_dma_handle **seglist;
 375
 376        struct drm_freelist freelist;
 377};
 378
 379/** File private data */
 380struct drm_file {
 381        int authenticated;
 382        int master;
 383        pid_t pid;
 384        uid_t uid;
 385        drm_magic_t magic;
 386        unsigned long ioctl_count;
 387        struct list_head lhead;
 388        struct drm_minor *minor;
 389        int remove_auth_on_close;
 390        unsigned long lock_count;
 391        /** Mapping of mm object handles to object pointers. */
 392        struct idr object_idr;
 393        /** Lock for synchronization of access to object_idr. */
 394        spinlock_t table_lock;
 395        struct file *filp;
 396        void *driver_priv;
 397};
 398
 399/** Wait queue */
 400struct drm_queue {
 401        atomic_t use_count;             /**< Outstanding uses (+1) */
 402        atomic_t finalization;          /**< Finalization in progress */
 403        atomic_t block_count;           /**< Count of processes waiting */
 404        atomic_t block_read;            /**< Queue blocked for reads */
 405        wait_queue_head_t read_queue;   /**< Processes waiting on block_read */
 406        atomic_t block_write;           /**< Queue blocked for writes */
 407        wait_queue_head_t write_queue;  /**< Processes waiting on block_write */
 408        atomic_t total_queued;          /**< Total queued statistic */
 409        atomic_t total_flushed;         /**< Total flushes statistic */
 410        atomic_t total_locks;           /**< Total locks statistics */
 411        enum drm_ctx_flags flags;       /**< Context preserving and 2D-only */
 412        struct drm_waitlist waitlist;   /**< Pending buffers */
 413        wait_queue_head_t flush_queue;  /**< Processes waiting until flush */
 414};
 415
 416/**
 417 * Lock data.
 418 */
 419struct drm_lock_data {
 420        struct drm_hw_lock *hw_lock;    /**< Hardware lock */
 421        /** Private of lock holder's file (NULL=kernel) */
 422        struct drm_file *file_priv;
 423        wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
 424        unsigned long lock_time;        /**< Time of last lock in jiffies */
 425        spinlock_t spinlock;
 426        uint32_t kernel_waiters;
 427        uint32_t user_waiters;
 428        int idle_has_lock;
 429};
 430
 431/**
 432 * DMA data.
 433 */
 434struct drm_device_dma {
 435
 436        struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   /**< buffers, grouped by their size order */
 437        int buf_count;                  /**< total number of buffers */
 438        struct drm_buf **buflist;               /**< Vector of pointers into drm_device_dma::bufs */
 439        int seg_count;
 440        int page_count;                 /**< number of pages */
 441        unsigned long *pagelist;        /**< page list */
 442        unsigned long byte_count;
 443        enum {
 444                _DRM_DMA_USE_AGP = 0x01,
 445                _DRM_DMA_USE_SG = 0x02,
 446                _DRM_DMA_USE_FB = 0x04,
 447                _DRM_DMA_USE_PCI_RO = 0x08
 448        } flags;
 449
 450};
 451
 452/**
 453 * AGP memory entry.  Stored as a doubly linked list.
 454 */
 455struct drm_agp_mem {
 456        unsigned long handle;           /**< handle */
 457        DRM_AGP_MEM *memory;
 458        unsigned long bound;            /**< address */
 459        int pages;
 460        struct list_head head;
 461};
 462
 463/**
 464 * AGP data.
 465 *
 466 * \sa drm_agp_init() and drm_device::agp.
 467 */
 468struct drm_agp_head {
 469        DRM_AGP_KERN agp_info;          /**< AGP device information */
 470        struct list_head memory;
 471        unsigned long mode;             /**< AGP mode */
 472        struct agp_bridge_data *bridge;
 473        int enabled;                    /**< whether the AGP bus as been enabled */
 474        int acquired;                   /**< whether the AGP device has been acquired */
 475        unsigned long base;
 476        int agp_mtrr;
 477        int cant_use_aperture;
 478        unsigned long page_mask;
 479};
 480
 481/**
 482 * Scatter-gather memory.
 483 */
 484struct drm_sg_mem {
 485        unsigned long handle;
 486        void *virtual;
 487        int pages;
 488        struct page **pagelist;
 489        dma_addr_t *busaddr;
 490};
 491
 492struct drm_sigdata {
 493        int context;
 494        struct drm_hw_lock *lock;
 495};
 496
 497
 498/*
 499 * Generic memory manager structs
 500 */
 501
 502struct drm_mm_node {
 503        struct list_head fl_entry;
 504        struct list_head ml_entry;
 505        int free;
 506        unsigned long start;
 507        unsigned long size;
 508        struct drm_mm *mm;
 509        void *private;
 510};
 511
 512struct drm_mm {
 513        struct list_head fl_entry;
 514        struct list_head ml_entry;
 515};
 516
 517
 518/**
 519 * Mappings list
 520 */
 521struct drm_map_list {
 522        struct list_head head;          /**< list head */
 523        struct drm_hash_item hash;
 524        struct drm_map *map;                    /**< mapping */
 525        uint64_t user_token;
 526};
 527
 528typedef struct drm_map drm_local_map_t;
 529
 530/**
 531 * Context handle list
 532 */
 533struct drm_ctx_list {
 534        struct list_head head;          /**< list head */
 535        drm_context_t handle;           /**< context handle */
 536        struct drm_file *tag;           /**< associated fd private data */
 537};
 538
 539struct drm_vbl_sig {
 540        struct list_head head;
 541        unsigned int sequence;
 542        struct siginfo info;
 543        struct task_struct *task;
 544};
 545
 546/* location of GART table */
 547#define DRM_ATI_GART_MAIN 1
 548#define DRM_ATI_GART_FB   2
 549
 550#define DRM_ATI_GART_PCI 1
 551#define DRM_ATI_GART_PCIE 2
 552#define DRM_ATI_GART_IGP 3
 553
 554struct drm_ati_pcigart_info {
 555        int gart_table_location;
 556        int gart_reg_if;
 557        void *addr;
 558        dma_addr_t bus_addr;
 559        dma_addr_t table_mask;
 560        struct drm_dma_handle *table_handle;
 561        drm_local_map_t mapping;
 562        int table_size;
 563};
 564
 565/**
 566 * This structure defines the drm_mm memory object, which will be used by the
 567 * DRM for its buffer objects.
 568 */
 569struct drm_gem_object {
 570        /** Reference count of this object */
 571        struct kref refcount;
 572
 573        /** Handle count of this object. Each handle also holds a reference */
 574        struct kref handlecount;
 575
 576        /** Related drm device */
 577        struct drm_device *dev;
 578
 579        /** File representing the shmem storage */
 580        struct file *filp;
 581
 582        /**
 583         * Size of the object, in bytes.  Immutable over the object's
 584         * lifetime.
 585         */
 586        size_t size;
 587
 588        /**
 589         * Global name for this object, starts at 1. 0 means unnamed.
 590         * Access is covered by the object_name_lock in the related drm_device
 591         */
 592        int name;
 593
 594        /**
 595         * Memory domains. These monitor which caches contain read/write data
 596         * related to the object. When transitioning from one set of domains
 597         * to another, the driver is called to ensure that caches are suitably
 598         * flushed and invalidated
 599         */
 600        uint32_t read_domains;
 601        uint32_t write_domain;
 602
 603        /**
 604         * While validating an exec operation, the
 605         * new read/write domain values are computed here.
 606         * They will be transferred to the above values
 607         * at the point that any cache flushing occurs
 608         */
 609        uint32_t pending_read_domains;
 610        uint32_t pending_write_domain;
 611
 612        void *driver_private;
 613};
 614
 615/**
 616 * DRM driver structure. This structure represent the common code for
 617 * a family of cards. There will one drm_device for each card present
 618 * in this family
 619 */
 620struct drm_driver {
 621        int (*load) (struct drm_device *, unsigned long flags);
 622        int (*firstopen) (struct drm_device *);
 623        int (*open) (struct drm_device *, struct drm_file *);
 624        void (*preclose) (struct drm_device *, struct drm_file *file_priv);
 625        void (*postclose) (struct drm_device *, struct drm_file *);
 626        void (*lastclose) (struct drm_device *);
 627        int (*unload) (struct drm_device *);
 628        int (*suspend) (struct drm_device *, pm_message_t state);
 629        int (*resume) (struct drm_device *);
 630        int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
 631        void (*dma_ready) (struct drm_device *);
 632        int (*dma_quiescent) (struct drm_device *);
 633        int (*context_ctor) (struct drm_device *dev, int context);
 634        int (*context_dtor) (struct drm_device *dev, int context);
 635        int (*kernel_context_switch) (struct drm_device *dev, int old,
 636                                      int new);
 637        void (*kernel_context_switch_unlock) (struct drm_device *dev);
 638        int (*dri_library_name) (struct drm_device *dev, char *buf);
 639
 640        /**
 641         * get_vblank_counter - get raw hardware vblank counter
 642         * @dev: DRM device
 643         * @crtc: counter to fetch
 644         *
 645         * Driver callback for fetching a raw hardware vblank counter
 646         * for @crtc.  If a device doesn't have a hardware counter, the
 647         * driver can simply return the value of drm_vblank_count and
 648         * make the enable_vblank() and disable_vblank() hooks into no-ops,
 649         * leaving interrupts enabled at all times.
 650         *
 651         * Wraparound handling and loss of events due to modesetting is dealt
 652         * with in the DRM core code.
 653         *
 654         * RETURNS
 655         * Raw vblank counter value.
 656         */
 657        u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
 658
 659        /**
 660         * enable_vblank - enable vblank interrupt events
 661         * @dev: DRM device
 662         * @crtc: which irq to enable
 663         *
 664         * Enable vblank interrupts for @crtc.  If the device doesn't have
 665         * a hardware vblank counter, this routine should be a no-op, since
 666         * interrupts will have to stay on to keep the count accurate.
 667         *
 668         * RETURNS
 669         * Zero on success, appropriate errno if the given @crtc's vblank
 670         * interrupt cannot be enabled.
 671         */
 672        int (*enable_vblank) (struct drm_device *dev, int crtc);
 673
 674        /**
 675         * disable_vblank - disable vblank interrupt events
 676         * @dev: DRM device
 677         * @crtc: which irq to enable
 678         *
 679         * Disable vblank interrupts for @crtc.  If the device doesn't have
 680         * a hardware vblank counter, this routine should be a no-op, since
 681         * interrupts will have to stay on to keep the count accurate.
 682         */
 683        void (*disable_vblank) (struct drm_device *dev, int crtc);
 684
 685        /**
 686         * Called by \c drm_device_is_agp.  Typically used to determine if a
 687         * card is really attached to AGP or not.
 688         *
 689         * \param dev  DRM device handle
 690         *
 691         * \returns
 692         * One of three values is returned depending on whether or not the
 693         * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
 694         * (return of 1), or may or may not be AGP (return of 2).
 695         */
 696        int (*device_is_agp) (struct drm_device *dev);
 697
 698        /* these have to be filled in */
 699
 700        irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
 701        void (*irq_preinstall) (struct drm_device *dev);
 702        int (*irq_postinstall) (struct drm_device *dev);
 703        void (*irq_uninstall) (struct drm_device *dev);
 704        void (*reclaim_buffers) (struct drm_device *dev,
 705                                 struct drm_file * file_priv);
 706        void (*reclaim_buffers_locked) (struct drm_device *dev,
 707                                        struct drm_file *file_priv);
 708        void (*reclaim_buffers_idlelocked) (struct drm_device *dev,
 709                                            struct drm_file *file_priv);
 710        unsigned long (*get_map_ofs) (struct drm_map * map);
 711        unsigned long (*get_reg_ofs) (struct drm_device *dev);
 712        void (*set_version) (struct drm_device *dev,
 713                             struct drm_set_version *sv);
 714
 715        int (*proc_init)(struct drm_minor *minor);
 716        void (*proc_cleanup)(struct drm_minor *minor);
 717
 718        /**
 719         * Driver-specific constructor for drm_gem_objects, to set up
 720         * obj->driver_private.
 721         *
 722         * Returns 0 on success.
 723         */
 724        int (*gem_init_object) (struct drm_gem_object *obj);
 725        void (*gem_free_object) (struct drm_gem_object *obj);
 726
 727        int major;
 728        int minor;
 729        int patchlevel;
 730        char *name;
 731        char *desc;
 732        char *date;
 733
 734        u32 driver_features;
 735        int dev_priv_size;
 736        struct drm_ioctl_desc *ioctls;
 737        int num_ioctls;
 738        struct file_operations fops;
 739        struct pci_driver pci_driver;
 740};
 741
 742#define DRM_MINOR_UNASSIGNED 0
 743#define DRM_MINOR_LEGACY 1
 744
 745/**
 746 * DRM minor structure. This structure represents a drm minor number.
 747 */
 748struct drm_minor {
 749        int index;                      /**< Minor device number */
 750        int type;                       /**< Control or render */
 751        dev_t device;                   /**< Device number for mknod */
 752        struct device kdev;             /**< Linux device */
 753        struct drm_device *dev;
 754        struct proc_dir_entry *dev_root;  /**< proc directory entry */
 755};
 756
 757/**
 758 * DRM device structure. This structure represent a complete card that
 759 * may contain multiple heads.
 760 */
 761struct drm_device {
 762        char *unique;                   /**< Unique identifier: e.g., busid */
 763        int unique_len;                 /**< Length of unique field */
 764        char *devname;                  /**< For /proc/interrupts */
 765        int if_version;                 /**< Highest interface version set */
 766
 767        int blocked;                    /**< Blocked due to VC switch? */
 768
 769        /** \name Locks */
 770        /*@{ */
 771        spinlock_t count_lock;          /**< For inuse, drm_device::open_count, drm_device::buf_use */
 772        struct mutex struct_mutex;      /**< For others */
 773        /*@} */
 774
 775        /** \name Usage Counters */
 776        /*@{ */
 777        int open_count;                 /**< Outstanding files open */
 778        atomic_t ioctl_count;           /**< Outstanding IOCTLs pending */
 779        atomic_t vma_count;             /**< Outstanding vma areas open */
 780        int buf_use;                    /**< Buffers in use -- cannot alloc */
 781        atomic_t buf_alloc;             /**< Buffer allocation in progress */
 782        /*@} */
 783
 784        /** \name Performance counters */
 785        /*@{ */
 786        unsigned long counters;
 787        enum drm_stat_type types[15];
 788        atomic_t counts[15];
 789        /*@} */
 790
 791        /** \name Authentication */
 792        /*@{ */
 793        struct list_head filelist;
 794        struct drm_open_hash magiclist; /**< magic hash table */
 795        struct list_head magicfree;
 796        /*@} */
 797
 798        /** \name Memory management */
 799        /*@{ */
 800        struct list_head maplist;       /**< Linked list of regions */
 801        int map_count;                  /**< Number of mappable regions */
 802        struct drm_open_hash map_hash;  /**< User token hash table for maps */
 803
 804        /** \name Context handle management */
 805        /*@{ */
 806        struct list_head ctxlist;       /**< Linked list of context handles */
 807        int ctx_count;                  /**< Number of context handles */
 808        struct mutex ctxlist_mutex;     /**< For ctxlist */
 809
 810        struct idr ctx_idr;
 811
 812        struct list_head vmalist;       /**< List of vmas (for debugging) */
 813        struct drm_lock_data lock;      /**< Information on hardware lock */
 814        /*@} */
 815
 816        /** \name DMA queues (contexts) */
 817        /*@{ */
 818        int queue_count;                /**< Number of active DMA queues */
 819        int queue_reserved;               /**< Number of reserved DMA queues */
 820        int queue_slots;                /**< Actual length of queuelist */
 821        struct drm_queue **queuelist;   /**< Vector of pointers to DMA queues */
 822        struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
 823        /*@} */
 824
 825        /** \name Context support */
 826        /*@{ */
 827        int irq_enabled;                /**< True if irq handler is enabled */
 828        __volatile__ long context_flag; /**< Context swapping flag */
 829        __volatile__ long interrupt_flag; /**< Interruption handler flag */
 830        __volatile__ long dma_flag;     /**< DMA dispatch flag */
 831        struct timer_list timer;        /**< Timer for delaying ctx switch */
 832        wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
 833        int last_checked;               /**< Last context checked for DMA */
 834        int last_context;               /**< Last current context */
 835        unsigned long last_switch;      /**< jiffies at last context switch */
 836        /*@} */
 837
 838        struct work_struct work;
 839        /** \name VBLANK IRQ support */
 840        /*@{ */
 841
 842        /*
 843         * At load time, disabling the vblank interrupt won't be allowed since
 844         * old clients may not call the modeset ioctl and therefore misbehave.
 845         * Once the modeset ioctl *has* been called though, we can safely
 846         * disable them when unused.
 847         */
 848        int vblank_disable_allowed;
 849
 850        wait_queue_head_t *vbl_queue;   /**< VBLANK wait queue */
 851        atomic_t *_vblank_count;        /**< number of VBLANK interrupts (driver must alloc the right number of counters) */
 852        spinlock_t vbl_lock;
 853        struct list_head *vbl_sigs;     /**< signal list to send on VBLANK */
 854        atomic_t vbl_signal_pending;    /* number of signals pending on all crtcs*/
 855        atomic_t *vblank_refcount;      /* number of users of vblank interruptsper crtc */
 856        u32 *last_vblank;               /* protected by dev->vbl_lock, used */
 857                                        /* for wraparound handling */
 858        int *vblank_enabled;            /* so we don't call enable more than
 859                                           once per disable */
 860        int *vblank_inmodeset;          /* Display driver is setting mode */
 861        struct timer_list vblank_disable_timer;
 862
 863        u32 max_vblank_count;           /**< size of vblank counter register */
 864
 865        /*@} */
 866        cycles_t ctx_start;
 867        cycles_t lck_start;
 868
 869        struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */
 870        wait_queue_head_t buf_readers;  /**< Processes waiting to read */
 871        wait_queue_head_t buf_writers;  /**< Processes waiting to ctx switch */
 872
 873        struct drm_agp_head *agp;       /**< AGP data */
 874
 875        struct pci_dev *pdev;           /**< PCI device structure */
 876        int pci_vendor;                 /**< PCI vendor id */
 877        int pci_device;                 /**< PCI device id */
 878#ifdef __alpha__
 879        struct pci_controller *hose;
 880#endif
 881        struct drm_sg_mem *sg;  /**< Scatter gather memory */
 882        int num_crtcs;                  /**< Number of CRTCs on this device */
 883        void *dev_private;              /**< device private data */
 884        struct drm_sigdata sigdata;        /**< For block_all_signals */
 885        sigset_t sigmask;
 886
 887        struct drm_driver *driver;
 888        drm_local_map_t *agp_buffer_map;
 889        unsigned int agp_buffer_token;
 890        struct drm_minor *primary;              /**< render type primary screen head */
 891
 892        /** \name Drawable information */
 893        /*@{ */
 894        spinlock_t drw_lock;
 895        struct idr drw_idr;
 896        /*@} */
 897
 898        /** \name GEM information */
 899        /*@{ */
 900        spinlock_t object_name_lock;
 901        struct idr object_name_idr;
 902        atomic_t object_count;
 903        atomic_t object_memory;
 904        atomic_t pin_count;
 905        atomic_t pin_memory;
 906        atomic_t gtt_count;
 907        atomic_t gtt_memory;
 908        uint32_t gtt_total;
 909        uint32_t invalidate_domains;    /* domains pending invalidation */
 910        uint32_t flush_domains;         /* domains pending flush */
 911        /*@} */
 912
 913};
 914
 915static inline int drm_dev_to_irq(struct drm_device *dev)
 916{
 917        return dev->pdev->irq;
 918}
 919
 920static __inline__ int drm_core_check_feature(struct drm_device *dev,
 921                                             int feature)
 922{
 923        return ((dev->driver->driver_features & feature) ? 1 : 0);
 924}
 925
 926#ifdef __alpha__
 927#define drm_get_pci_domain(dev) dev->hose->index
 928#else
 929#define drm_get_pci_domain(dev) 0
 930#endif
 931
 932#if __OS_HAS_AGP
 933static inline int drm_core_has_AGP(struct drm_device *dev)
 934{
 935        return drm_core_check_feature(dev, DRIVER_USE_AGP);
 936}
 937#else
 938#define drm_core_has_AGP(dev) (0)
 939#endif
 940
 941#if __OS_HAS_MTRR
 942static inline int drm_core_has_MTRR(struct drm_device *dev)
 943{
 944        return drm_core_check_feature(dev, DRIVER_USE_MTRR);
 945}
 946
 947#define DRM_MTRR_WC             MTRR_TYPE_WRCOMB
 948
 949static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
 950                               unsigned int flags)
 951{
 952        return mtrr_add(offset, size, flags, 1);
 953}
 954
 955static inline int drm_mtrr_del(int handle, unsigned long offset,
 956                               unsigned long size, unsigned int flags)
 957{
 958        return mtrr_del(handle, offset, size);
 959}
 960
 961#else
 962#define drm_core_has_MTRR(dev) (0)
 963
 964#define DRM_MTRR_WC             0
 965
 966static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
 967                               unsigned int flags)
 968{
 969        return 0;
 970}
 971
 972static inline int drm_mtrr_del(int handle, unsigned long offset,
 973                               unsigned long size, unsigned int flags)
 974{
 975        return 0;
 976}
 977#endif
 978
 979/******************************************************************/
 980/** \name Internal function definitions */
 981/*@{*/
 982
 983                                /* Driver support (drm_drv.h) */
 984extern int drm_init(struct drm_driver *driver);
 985extern void drm_exit(struct drm_driver *driver);
 986extern int drm_ioctl(struct inode *inode, struct file *filp,
 987                     unsigned int cmd, unsigned long arg);
 988extern long drm_compat_ioctl(struct file *filp,
 989                             unsigned int cmd, unsigned long arg);
 990extern int drm_lastclose(struct drm_device *dev);
 991
 992                                /* Device support (drm_fops.h) */
 993extern int drm_open(struct inode *inode, struct file *filp);
 994extern int drm_stub_open(struct inode *inode, struct file *filp);
 995extern int drm_fasync(int fd, struct file *filp, int on);
 996extern int drm_release(struct inode *inode, struct file *filp);
 997
 998                                /* Mapping support (drm_vm.h) */
 999extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1000extern unsigned long drm_core_get_map_ofs(struct drm_map * map);
1001extern unsigned long drm_core_get_reg_ofs(struct drm_device *dev);
1002extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1003
1004                                /* Memory management support (drm_memory.h) */
1005#include "drm_memory.h"
1006extern void drm_mem_init(void);
1007extern int drm_mem_info(char *buf, char **start, off_t offset,
1008                        int request, int *eof, void *data);
1009extern void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area);
1010
1011extern DRM_AGP_MEM *drm_alloc_agp(struct drm_device *dev, int pages, u32 type);
1012extern int drm_free_agp(DRM_AGP_MEM * handle, int pages);
1013extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
1014extern DRM_AGP_MEM *drm_agp_bind_pages(struct drm_device *dev,
1015                                       struct page **pages,
1016                                       unsigned long num_pages,
1017                                       uint32_t gtt_offset,
1018                                       uint32_t type);
1019extern int drm_unbind_agp(DRM_AGP_MEM * handle);
1020
1021                                /* Misc. IOCTL support (drm_ioctl.h) */
1022extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1023                            struct drm_file *file_priv);
1024extern int drm_getunique(struct drm_device *dev, void *data,
1025                         struct drm_file *file_priv);
1026extern int drm_setunique(struct drm_device *dev, void *data,
1027                         struct drm_file *file_priv);
1028extern int drm_getmap(struct drm_device *dev, void *data,
1029                      struct drm_file *file_priv);
1030extern int drm_getclient(struct drm_device *dev, void *data,
1031                         struct drm_file *file_priv);
1032extern int drm_getstats(struct drm_device *dev, void *data,
1033                        struct drm_file *file_priv);
1034extern int drm_setversion(struct drm_device *dev, void *data,
1035                          struct drm_file *file_priv);
1036extern int drm_noop(struct drm_device *dev, void *data,
1037                    struct drm_file *file_priv);
1038
1039                                /* Context IOCTL support (drm_context.h) */
1040extern int drm_resctx(struct drm_device *dev, void *data,
1041                      struct drm_file *file_priv);
1042extern int drm_addctx(struct drm_device *dev, void *data,
1043                      struct drm_file *file_priv);
1044extern int drm_modctx(struct drm_device *dev, void *data,
1045                      struct drm_file *file_priv);
1046extern int drm_getctx(struct drm_device *dev, void *data,
1047                      struct drm_file *file_priv);
1048extern int drm_switchctx(struct drm_device *dev, void *data,
1049                         struct drm_file *file_priv);
1050extern int drm_newctx(struct drm_device *dev, void *data,
1051                      struct drm_file *file_priv);
1052extern int drm_rmctx(struct drm_device *dev, void *data,
1053                     struct drm_file *file_priv);
1054
1055extern int drm_ctxbitmap_init(struct drm_device *dev);
1056extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1057extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1058
1059extern int drm_setsareactx(struct drm_device *dev, void *data,
1060                           struct drm_file *file_priv);
1061extern int drm_getsareactx(struct drm_device *dev, void *data,
1062                           struct drm_file *file_priv);
1063
1064                                /* Drawable IOCTL support (drm_drawable.h) */
1065extern int drm_adddraw(struct drm_device *dev, void *data,
1066                       struct drm_file *file_priv);
1067extern int drm_rmdraw(struct drm_device *dev, void *data,
1068                      struct drm_file *file_priv);
1069extern int drm_update_drawable_info(struct drm_device *dev, void *data,
1070                                    struct drm_file *file_priv);
1071extern struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev,
1072                                                  drm_drawable_t id);
1073extern void drm_drawable_free_all(struct drm_device *dev);
1074
1075                                /* Authentication IOCTL support (drm_auth.h) */
1076extern int drm_getmagic(struct drm_device *dev, void *data,
1077                        struct drm_file *file_priv);
1078extern int drm_authmagic(struct drm_device *dev, void *data,
1079                         struct drm_file *file_priv);
1080
1081/* Cache management (drm_cache.c) */
1082void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1083
1084                                /* Locking IOCTL support (drm_lock.h) */
1085extern int drm_lock(struct drm_device *dev, void *data,
1086                    struct drm_file *file_priv);
1087extern int drm_unlock(struct drm_device *dev, void *data,
1088                      struct drm_file *file_priv);
1089extern int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context);
1090extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1091extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1092extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1093
1094/*
1095 * These are exported to drivers so that they can implement fencing using
1096 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1097 */
1098
1099extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1100
1101                                /* Buffer management support (drm_bufs.h) */
1102extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1103extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1104extern int drm_addmap(struct drm_device *dev, unsigned int offset,
1105                      unsigned int size, enum drm_map_type type,
1106                      enum drm_map_flags flags, drm_local_map_t ** map_ptr);
1107extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1108                            struct drm_file *file_priv);
1109extern int drm_rmmap(struct drm_device *dev, drm_local_map_t *map);
1110extern int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map);
1111extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1112                           struct drm_file *file_priv);
1113extern int drm_addbufs(struct drm_device *dev, void *data,
1114                       struct drm_file *file_priv);
1115extern int drm_infobufs(struct drm_device *dev, void *data,
1116                        struct drm_file *file_priv);
1117extern int drm_markbufs(struct drm_device *dev, void *data,
1118                        struct drm_file *file_priv);
1119extern int drm_freebufs(struct drm_device *dev, void *data,
1120                        struct drm_file *file_priv);
1121extern int drm_mapbufs(struct drm_device *dev, void *data,
1122                       struct drm_file *file_priv);
1123extern int drm_order(unsigned long size);
1124extern unsigned long drm_get_resource_start(struct drm_device *dev,
1125                                            unsigned int resource);
1126extern unsigned long drm_get_resource_len(struct drm_device *dev,
1127                                          unsigned int resource);
1128
1129                                /* DMA support (drm_dma.h) */
1130extern int drm_dma_setup(struct drm_device *dev);
1131extern void drm_dma_takedown(struct drm_device *dev);
1132extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1133extern void drm_core_reclaim_buffers(struct drm_device *dev,
1134                                     struct drm_file *filp);
1135
1136                                /* IRQ support (drm_irq.h) */
1137extern int drm_control(struct drm_device *dev, void *data,
1138                       struct drm_file *file_priv);
1139extern irqreturn_t drm_irq_handler(DRM_IRQ_ARGS);
1140extern int drm_irq_install(struct drm_device *dev);
1141extern int drm_irq_uninstall(struct drm_device *dev);
1142extern void drm_driver_irq_preinstall(struct drm_device *dev);
1143extern void drm_driver_irq_postinstall(struct drm_device *dev);
1144extern void drm_driver_irq_uninstall(struct drm_device *dev);
1145
1146extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1147extern int drm_wait_vblank(struct drm_device *dev, void *data,
1148                           struct drm_file *filp);
1149extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
1150extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1151extern void drm_handle_vblank(struct drm_device *dev, int crtc);
1152extern int drm_vblank_get(struct drm_device *dev, int crtc);
1153extern void drm_vblank_put(struct drm_device *dev, int crtc);
1154extern void drm_vblank_cleanup(struct drm_device *dev);
1155/* Modesetting support */
1156extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1157                           struct drm_file *file_priv);
1158
1159                                /* AGP/GART support (drm_agpsupport.h) */
1160extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
1161extern int drm_agp_acquire(struct drm_device *dev);
1162extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
1163                                 struct drm_file *file_priv);
1164extern int drm_agp_release(struct drm_device *dev);
1165extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
1166                                 struct drm_file *file_priv);
1167extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1168extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
1169                                struct drm_file *file_priv);
1170extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
1171extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
1172                        struct drm_file *file_priv);
1173extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1174extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
1175                         struct drm_file *file_priv);
1176extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1177extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
1178                        struct drm_file *file_priv);
1179extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1180extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
1181                          struct drm_file *file_priv);
1182extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1183extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
1184                        struct drm_file *file_priv);
1185extern DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size_t pages, u32 type);
1186extern int drm_agp_free_memory(DRM_AGP_MEM * handle);
1187extern int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start);
1188extern int drm_agp_unbind_memory(DRM_AGP_MEM * handle);
1189extern void drm_agp_chipset_flush(struct drm_device *dev);
1190
1191                                /* Stub support (drm_stub.h) */
1192extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
1193                       struct drm_driver *driver);
1194extern int drm_put_dev(struct drm_device *dev);
1195extern int drm_put_minor(struct drm_minor **minor);
1196extern unsigned int drm_debug;
1197
1198extern struct class *drm_class;
1199extern struct proc_dir_entry *drm_proc_root;
1200
1201extern struct idr drm_minors_idr;
1202
1203extern drm_local_map_t *drm_getsarea(struct drm_device *dev);
1204
1205                                /* Proc support (drm_proc.h) */
1206extern int drm_proc_init(struct drm_minor *minor, int minor_id,
1207                         struct proc_dir_entry *root);
1208extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);
1209
1210                                /* Scatter Gather Support (drm_scatter.h) */
1211extern void drm_sg_cleanup(struct drm_sg_mem * entry);
1212extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
1213                        struct drm_file *file_priv);
1214extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
1215extern int drm_sg_free(struct drm_device *dev, void *data,
1216                       struct drm_file *file_priv);
1217
1218                               /* ATI PCIGART support (ati_pcigart.h) */
1219extern int drm_ati_pcigart_init(struct drm_device *dev,
1220                                struct drm_ati_pcigart_info * gart_info);
1221extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1222                                   struct drm_ati_pcigart_info * gart_info);
1223
1224extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1225                                       size_t align, dma_addr_t maxaddr);
1226extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1227extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1228
1229                               /* sysfs support (drm_sysfs.c) */
1230struct drm_sysfs_class;
1231extern struct class *drm_sysfs_create(struct module *owner, char *name);
1232extern void drm_sysfs_destroy(void);
1233extern int drm_sysfs_device_add(struct drm_minor *minor);
1234extern void drm_sysfs_device_remove(struct drm_minor *minor);
1235
1236/*
1237 * Basic memory manager support (drm_mm.c)
1238 */
1239extern struct drm_mm_node *drm_mm_get_block(struct drm_mm_node * parent,
1240                                       unsigned long size,
1241                                       unsigned alignment);
1242extern void drm_mm_put_block(struct drm_mm_node * cur);
1243extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, unsigned long size,
1244                                         unsigned alignment, int best_match);
1245extern int drm_mm_init(struct drm_mm *mm, unsigned long start, unsigned long size);
1246extern void drm_mm_takedown(struct drm_mm *mm);
1247extern int drm_mm_clean(struct drm_mm *mm);
1248extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
1249extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, unsigned long size);
1250extern int drm_mm_add_space_to_tail(struct drm_mm *mm, unsigned long size);
1251
1252/* Graphics Execution Manager library functions (drm_gem.c) */
1253int drm_gem_init(struct drm_device *dev);
1254void drm_gem_object_free(struct kref *kref);
1255struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
1256                                            size_t size);
1257void drm_gem_object_handle_free(struct kref *kref);
1258
1259static inline void
1260drm_gem_object_reference(struct drm_gem_object *obj)
1261{
1262        kref_get(&obj->refcount);
1263}
1264
1265static inline void
1266drm_gem_object_unreference(struct drm_gem_object *obj)
1267{
1268        if (obj == NULL)
1269                return;
1270
1271        kref_put(&obj->refcount, drm_gem_object_free);
1272}
1273
1274int drm_gem_handle_create(struct drm_file *file_priv,
1275                          struct drm_gem_object *obj,
1276                          int *handlep);
1277
1278static inline void
1279drm_gem_object_handle_reference(struct drm_gem_object *obj)
1280{
1281        drm_gem_object_reference(obj);
1282        kref_get(&obj->handlecount);
1283}
1284
1285static inline void
1286drm_gem_object_handle_unreference(struct drm_gem_object *obj)
1287{
1288        if (obj == NULL)
1289                return;
1290
1291        /*
1292         * Must bump handle count first as this may be the last
1293         * ref, in which case the object would disappear before we
1294         * checked for a name
1295         */
1296        kref_put(&obj->handlecount, drm_gem_object_handle_free);
1297        drm_gem_object_unreference(obj);
1298}
1299
1300struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1301                                             struct drm_file *filp,
1302                                             int handle);
1303int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1304                        struct drm_file *file_priv);
1305int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1306                        struct drm_file *file_priv);
1307int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1308                       struct drm_file *file_priv);
1309void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1310void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1311
1312extern void drm_core_ioremap(struct drm_map *map, struct drm_device *dev);
1313extern void drm_core_ioremap_wc(struct drm_map *map, struct drm_device *dev);
1314extern void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev);
1315
1316static __inline__ struct drm_map *drm_core_findmap(struct drm_device *dev,
1317                                                   unsigned int token)
1318{
1319        struct drm_map_list *_entry;
1320        list_for_each_entry(_entry, &dev->maplist, head)
1321            if (_entry->user_token == token)
1322                return _entry->map;
1323        return NULL;
1324}
1325
1326static __inline__ int drm_device_is_agp(struct drm_device *dev)
1327{
1328        if (dev->driver->device_is_agp != NULL) {
1329                int err = (*dev->driver->device_is_agp) (dev);
1330
1331                if (err != 2) {
1332                        return err;
1333                }
1334        }
1335
1336        return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1337}
1338
1339static __inline__ int drm_device_is_pcie(struct drm_device *dev)
1340{
1341        return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
1342}
1343
1344static __inline__ void drm_core_dropmap(struct drm_map *map)
1345{
1346}
1347
1348#ifndef DEBUG_MEMORY
1349/** Wrapper around kmalloc() */
1350static __inline__ void *drm_alloc(size_t size, int area)
1351{
1352        return kmalloc(size, GFP_KERNEL);
1353}
1354
1355/** Wrapper around kfree() */
1356static __inline__ void drm_free(void *pt, size_t size, int area)
1357{
1358        kfree(pt);
1359}
1360
1361/** Wrapper around kcalloc() */
1362static __inline__ void *drm_calloc(size_t nmemb, size_t size, int area)
1363{
1364        return kcalloc(nmemb, size, GFP_KERNEL);
1365}
1366#else
1367extern void *drm_alloc(size_t size, int area);
1368extern void drm_free(void *pt, size_t size, int area);
1369extern void *drm_calloc(size_t nmemb, size_t size, int area);
1370#endif
1371
1372/*@}*/
1373
1374#endif                          /* __KERNEL__ */
1375#endif
1376
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