include/drm/drm_device.h

   1 #ifndef _DRM_DEVICE_H_
   2 #define _DRM_DEVICE_H_
   3
   4 #include <linux/list.h>
   5 #include <linux/kref.h>
   6 #include <linux/mutex.h>
   7 #include <linux/idr.h>
   8
   9 #include <drm/drm_hashtab.h>
  10 #include <drm/drm_mode_config.h>
  11
  12 struct drm_driver;
  13 struct drm_minor;
  14 struct drm_master;
  15 struct drm_device_dma;
  16 struct drm_vblank_crtc;
  17 struct drm_sg_mem;
  18 struct drm_local_map;
  19 struct drm_vma_offset_manager;
  20 struct drm_fb_helper;
  21
  22 struct inode;
  23
  24 struct pci_dev;
  25 struct pci_controller;
  26
  27 /**
  28  * DRM device structure. This structure represent a complete card that
  29  * may contain multiple heads.
  30  */
  31 struct drm_device {
  32         struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
  33         int if_version;                 /**< Highest interface version set */
  34
  35         /** \name Lifetime Management */
  36         /*@{ */
  37         struct kref ref;                /**< Object ref-count */
  38         struct device *dev;             /**< Device structure of bus-device */
  39         struct drm_driver *driver;      /**< DRM driver managing the device */
  40         void *dev_private;              /**< DRM driver private data */
  41         struct drm_minor *control;              /**< Control node */
  42         struct drm_minor *primary;              /**< Primary node */
  43         struct drm_minor *render;               /**< Render node */
  44         bool registered;
  45
  46         /* currently active master for this device. Protected by master_mutex */
  47         struct drm_master *master;
  48
  49         atomic_t unplugged;                     /**< Flag whether dev is dead */
  50         struct inode *anon_inode;               /**< inode for private address-space */
  51         char *unique;                           /**< unique name of the device */
  52         /*@} */
  53
  54         /** \name Locks */
  55         /*@{ */
  56         struct mutex struct_mutex;      /**< For others */
  57         struct mutex master_mutex;      /**< For drm_minor::master and drm_file::is_master */
  58         /*@} */
  59
  60         /** \name Usage Counters */
  61         /*@{ */
  62         int open_count;                 /**< Outstanding files open, protected by drm_global_mutex. */
  63         spinlock_t buf_lock;            /**< For drm_device::buf_use and a few other things. */
  64         int buf_use;                    /**< Buffers in use -- cannot alloc */
  65         atomic_t buf_alloc;             /**< Buffer allocation in progress */
  66         /*@} */
  67
  68         struct mutex filelist_mutex;
  69         struct list_head filelist;
  70
  71         /** \name Memory management */
  72         /*@{ */
  73         struct list_head maplist;       /**< Linked list of regions */
  74         struct drm_open_hash map_hash;  /**< User token hash table for maps */
  75
  76         /** \name Context handle management */
  77         /*@{ */
  78         struct list_head ctxlist;       /**< Linked list of context handles */
  79         struct mutex ctxlist_mutex;     /**< For ctxlist */
  80
  81         struct idr ctx_idr;
  82
  83         struct list_head vmalist;       /**< List of vmas (for debugging) */
  84
  85         /*@} */
  86
  87         /** \name DMA support */
  88         /*@{ */
  89         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
  90         /*@} */
  91
  92         /** \name Context support */
  93         /*@{ */
  94
  95         __volatile__ long context_flag; /**< Context swapping flag */
  96         int last_context;               /**< Last current context */
  97         /*@} */
  98
  99         /**
 100          * @irq_enabled:
 101          *
 102          * Indicates that interrupt handling is enabled, specifically vblank
 103          * handling. Drivers which don't use drm_irq_install() need to set this
 104          * to true manually.
 105          */
 106         bool irq_enabled;
 107         int irq;
 108
 109         /**
 110          * @vblank_disable_immediate:
 111          *
 112          * If true, vblank interrupt will be disabled immediately when the
 113          * refcount drops to zero, as opposed to via the vblank disable
 114          * timer.
 115          *
 116          * This can be set to true it the hardware has a working vblank counter
 117          * with high-precision timestamping (otherwise there are races) and the
 118          * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off()
 119          * appropriately. See also @max_vblank_count and
 120          * &drm_crtc_funcs.get_vblank_counter.
 121          */
 122         bool vblank_disable_immediate;
 123
 124         /**
 125          * @vblank:
 126          *
 127          * Array of vblank tracking structures, one per &struct drm_crtc. For
 128          * historical reasons (vblank support predates kernel modesetting) this
 129          * is free-standing and not part of &struct drm_crtc itself. It must be
 130          * initialized explicitly by calling drm_vblank_init().
 131          */
 132         struct drm_vblank_crtc *vblank;
 133
 134         spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
 135         spinlock_t vbl_lock;
 136
 137         /**
 138          * @max_vblank_count:
 139          *
 140          * Maximum value of the vblank registers. This value +1 will result in a
 141          * wrap-around of the vblank register. It is used by the vblank core to
 142          * handle wrap-arounds.
 143          *
 144          * If set to zero the vblank core will try to guess the elapsed vblanks
 145          * between times when the vblank interrupt is disabled through
 146          * high-precision timestamps. That approach is suffering from small
 147          * races and imprecision over longer time periods, hence exposing a
 148          * hardware vblank counter is always recommended.
 149          *
 150          * If non-zeor, &drm_crtc_funcs.get_vblank_counter must be set.
 151          */
 152         u32 max_vblank_count;           /**< size of vblank counter register */
 153
 154         /**
 155          * List of events
 156          */
 157         struct list_head vblank_event_list;
 158         spinlock_t event_lock;
 159
 160         /*@} */
 161
 162         struct drm_agp_head *agp;       /**< AGP data */
 163
 164         struct pci_dev *pdev;           /**< PCI device structure */
 165 #ifdef __alpha__
 166         struct pci_controller *hose;
 167 #endif
 168
 169         struct drm_sg_mem *sg;  /**< Scatter gather memory */
 170         unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
 171
 172         struct {
 173                 int context;
 174                 struct drm_hw_lock *lock;
 175         } sigdata;
 176
 177         struct drm_local_map *agp_buffer_map;
 178         unsigned int agp_buffer_token;
 179
 180         struct drm_mode_config mode_config;     /**< Current mode config */
 181
 182         /** \name GEM information */
 183         /*@{ */
 184         struct mutex object_name_lock;
 185         struct idr object_name_idr;
 186         struct drm_vma_offset_manager *vma_offset_manager;
 187         /*@} */
 188         int switch_power_state;
 189
 190         /**
 191          * @fb_helper:
 192          *
 193          * Pointer to the fbdev emulation structure.
 194          * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini().
 195          */
 196         struct drm_fb_helper *fb_helper;
 197 };
 198
 199 #endif