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TOMOYO Linux Cross Reference
Linux/include/drm/drm_device.h

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  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
200 

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