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