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* Internal Header for the Direct Rendering Manager
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* Copyright (c) 2009-2010, Code Aurora Forum.
* All rights reserved.
* Author: Rickard E. (Rik) Faith <>
* Author: Gareth Hughes <>
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
#ifndef _DRM_P_H_
#define _DRM_P_H_
#include <linux/agp_backend.h>
#include <linux/cdev.h>
#include <linux/dma-mapping.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/highmem.h>
#include <linux/idr.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/miscdevice.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/poll.h>
#include <linux/ratelimit.h>
#include <linux/rbtree.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
#include <linux/fence.h>
#include <asm/mman.h>
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <uapi/drm/drm.h>
#include <uapi/drm/drm_mode.h>
#include <drm/drm_agpsupport.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_global.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_mem_util.h>
#include <drm/drm_mm.h>
#include <drm/drm_os_linux.h>
#include <drm/drm_sarea.h>
#include <drm/drm_vma_manager.h>
struct module;
struct drm_file;
struct drm_device;
struct drm_agp_head;
struct drm_local_map;
struct drm_device_dma;
struct drm_dma_handle;
struct drm_gem_object;
struct drm_master;
struct drm_vblank_crtc;
struct device_node;
struct videomode;
struct reservation_object;
struct dma_buf_attachment;
* The following categories are defined:
* CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
* This is the category used by the DRM_DEBUG() macro.
* DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
* This is the category used by the DRM_DEBUG_DRIVER() macro.
* KMS: used in the modesetting code.
* This is the category used by the DRM_DEBUG_KMS() macro.
* PRIME: used in the prime code.
* This is the category used by the DRM_DEBUG_PRIME() macro.
* ATOMIC: used in the atomic code.
* This is the category used by the DRM_DEBUG_ATOMIC() macro.
* VBL: used for verbose debug message in the vblank code
* This is the category used by the DRM_DEBUG_VBL() macro.
* Enabling verbose debug messages is done through the drm.debug parameter,
* each category being enabled by a bit.
* drm.debug=0x1 will enable CORE messages
* drm.debug=0x2 will enable DRIVER messages
* drm.debug=0x3 will enable CORE and DRIVER messages
* ...
* drm.debug=0x3f will enable all messages
* An interesting feature is that it's possible to enable verbose logging at
* run-time by echoing the debug value in its sysfs node:
* # echo 0xf > /sys/module/drm/parameters/debug
#define DRM_UT_NONE 0x00
#define DRM_UT_CORE 0x01
#define DRM_UT_DRIVER 0x02
#define DRM_UT_KMS 0x04
#define DRM_UT_PRIME 0x08
#define DRM_UT_ATOMIC 0x10
#define DRM_UT_VBL 0x20
extern __printf(6, 7)
void drm_dev_printk(const struct device *dev, const char *level,
unsigned int category, const char *function_name,
const char *prefix, const char *format, ...);
extern __printf(3, 4)
void drm_printk(const char *level, unsigned int category,
const char *format, ...);
/** \name DRM template customization defaults */
/* driver capabilities and requirements mask */
#define DRIVER_USE_AGP 0x1
#define DRIVER_LEGACY 0x2
#define DRIVER_PCI_DMA 0x8
#define DRIVER_SG 0x10
#define DRIVER_HAVE_DMA 0x20
#define DRIVER_HAVE_IRQ 0x40
#define DRIVER_IRQ_SHARED 0x80
#define DRIVER_GEM 0x1000
#define DRIVER_MODESET 0x2000
#define DRIVER_PRIME 0x4000
#define DRIVER_RENDER 0x8000
#define DRIVER_ATOMIC 0x10000
/** \name Macros to make printk easier */
#define _DRM_PRINTK(once, level, fmt, ...) \
do { \
printk##once(KERN_##level "[" DRM_NAME "] " fmt, \
##__VA_ARGS__); \
} while (0)
#define DRM_INFO(fmt, ...) \
_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
#define DRM_NOTE(fmt, ...) \
#define DRM_WARN(fmt, ...) \
#define DRM_INFO_ONCE(fmt, ...) \
_DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
#define DRM_NOTE_ONCE(fmt, ...) \
_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
#define DRM_WARN_ONCE(fmt, ...) \
_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
* Error output.
* \param fmt printf() like format string.
* \param arg arguments
#define DRM_DEV_ERROR(dev, fmt, ...) \
drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
fmt, ##__VA_ARGS__)
#define DRM_ERROR(fmt, ...) \
drm_printk(KERN_ERR, DRM_UT_NONE, fmt, ##__VA_ARGS__)
* Rate limited error output. Like DRM_ERROR() but won't flood the log.
* \param fmt printf() like format string.
* \param arg arguments
#define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...) \
({ \
if (__ratelimit(&_rs)) \
DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__); \
#define DRM_ERROR_RATELIMITED(fmt, ...) \
#define DRM_DEV_INFO(dev, fmt, ...) \
drm_dev_printk(dev, KERN_INFO, DRM_UT_NONE, __func__, "", fmt, \
#define DRM_DEV_INFO_ONCE(dev, fmt, ...) \
({ \
static bool __print_once __read_mostly; \
if (!__print_once) { \
__print_once = true; \
DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__); \
} \
* Debug output.
* \param fmt printf() like format string.
* \param arg arguments
#define DRM_DEV_DEBUG(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, \
#define DRM_DEBUG(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_CORE, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "", \
fmt, ##args)
#define DRM_DEBUG_DRIVER(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_KMS(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt, \
#define DRM_DEBUG_KMS(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_KMS, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_PRIME(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "", \
fmt, ##args)
#define DRM_DEBUG_PRIME(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "", \
fmt, ##args)
#define DRM_DEBUG_ATOMIC(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_VBL(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt, \
#define DRM_DEBUG_VBL(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_VBL, fmt, ##__VA_ARGS__)
#define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...) \
({ \
if (__ratelimit(&_rs)) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ ## level, \
__func__, "", fmt, ##args); \
* Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
* \param fmt printf() like format string.
* \param arg arguments
#define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, args...) \
#define DRM_DEBUG_RATELIMITED(fmt, args...) \
#define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, args...) \
#define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...) \
#define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, args...) \
#define DRM_DEBUG_KMS_RATELIMITED(fmt, args...) \
#define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, args...) \
#define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...) \
/** \name Internal types and structures */
#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
* Ioctl function type.
* \param inode device inode.
* \param file_priv DRM file private pointer.
* \param cmd command.
* \param arg argument.
typedef int drm_ioctl_t(struct drm_device *dev, void *data,
struct drm_file *file_priv);
typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
unsigned long arg);
#define DRM_IOCTL_NR(n) _IOC_NR(n)
#define DRM_MAJOR 226
#define DRM_AUTH 0x1
#define DRM_MASTER 0x2
#define DRM_ROOT_ONLY 0x4
#define DRM_UNLOCKED 0x10
#define DRM_RENDER_ALLOW 0x20
struct drm_ioctl_desc {
unsigned int cmd;
int flags;
drm_ioctl_t *func;
const char *name;
* Creates a driver or general drm_ioctl_desc array entry for the given
* ioctl, for use by drm_ioctl().
#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
.cmd = DRM_IOCTL_##ioctl, \
.func = _func, \
.flags = _flags, \
.name = #ioctl \
/* Event queued up for userspace to read */
struct drm_pending_event {
struct completion *completion;
struct drm_event *event;
struct fence *fence;
struct list_head link;
struct list_head pending_link;
struct drm_file *file_priv;
pid_t pid; /* pid of requester, no guarantee it's valid by the time
we deliver the event, for tracing only */
struct drm_prime_file_private {
struct mutex lock;
struct rb_root dmabufs;
struct rb_root handles;
/** File private data */
struct drm_file {
unsigned authenticated :1;
/* true when the client has asked us to expose stereo 3D mode flags */
unsigned stereo_allowed :1;
* true if client understands CRTC primary planes and cursor planes
* in the plane list
unsigned universal_planes:1;
/* true if client understands atomic properties */
unsigned atomic:1;
* This client is the creator of @master.
* Protected by struct drm_device::master_mutex.
unsigned is_master:1;
struct pid *pid;
drm_magic_t magic;
struct list_head lhead;
struct drm_minor *minor;
unsigned long lock_count;
/** Mapping of mm object handles to object pointers. */
struct idr object_idr;
/** Lock for synchronization of access to object_idr. */
spinlock_t table_lock;
struct file *filp;
void *driver_priv;
struct drm_master *master; /* master this node is currently associated with
N.B. not always dev->master */
* fbs - List of framebuffers associated with this file.
* Protected by fbs_lock. Note that the fbs list holds a reference on
* the fb object to prevent it from untimely disappearing.
struct list_head fbs;
struct mutex fbs_lock;
/** User-created blob properties; this retains a reference on the
* property. */
struct list_head blobs;
wait_queue_head_t event_wait;
struct list_head pending_event_list;
struct list_head event_list;
int event_space;
struct mutex event_read_lock;
struct drm_prime_file_private prime;
* Lock data.
struct drm_lock_data {
struct drm_hw_lock *hw_lock; /**< Hardware lock */
/** Private of lock holder's file (NULL=kernel) */
struct drm_file *file_priv;
wait_queue_head_t lock_queue; /**< Queue of blocked processes */
unsigned long lock_time; /**< Time of last lock in jiffies */
spinlock_t spinlock;
uint32_t kernel_waiters;
uint32_t user_waiters;
int idle_has_lock;
/* Flags and return codes for get_vblank_timestamp() driver function. */
/* get_scanout_position() return flags */
#define DRM_SCANOUTPOS_VALID (1 << 0)
* DRM driver structure. This structure represent the common code for
* a family of cards. There will one drm_device for each card present
* in this family
struct drm_driver {
int (*load) (struct drm_device *, unsigned long flags);
int (*firstopen) (struct drm_device *);
int (*open) (struct drm_device *, struct drm_file *);
void (*preclose) (struct drm_device *, struct drm_file *file_priv);
void (*postclose) (struct drm_device *, struct drm_file *);
void (*lastclose) (struct drm_device *);
int (*unload) (struct drm_device *);
int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
int (*dma_quiescent) (struct drm_device *);
int (*context_dtor) (struct drm_device *dev, int context);
int (*set_busid)(struct drm_device *dev, struct drm_master *master);
* get_vblank_counter - get raw hardware vblank counter
* @dev: DRM device
* @pipe: counter to fetch
* Driver callback for fetching a raw hardware vblank counter for @crtc.
* If a device doesn't have a hardware counter, the driver can simply
* use drm_vblank_no_hw_counter() function. The DRM core will account for
* missed vblank events while interrupts where disabled based on system
* timestamps.
* Wraparound handling and loss of events due to modesetting is dealt
* with in the DRM core code.
* Raw vblank counter value.
u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe);
* enable_vblank - enable vblank interrupt events
* @dev: DRM device
* @pipe: which irq to enable
* Enable vblank interrupts for @crtc. If the device doesn't have
* a hardware vblank counter, the driver should use the
* drm_vblank_no_hw_counter() function that keeps a virtual counter.
* Zero on success, appropriate errno if the given @crtc's vblank
* interrupt cannot be enabled.
int (*enable_vblank) (struct drm_device *dev, unsigned int pipe);
* disable_vblank - disable vblank interrupt events
* @dev: DRM device
* @pipe: which irq to enable
* Disable vblank interrupts for @crtc. If the device doesn't have
* a hardware vblank counter, the driver should use the
* drm_vblank_no_hw_counter() function that keeps a virtual counter.
void (*disable_vblank) (struct drm_device *dev, unsigned int pipe);
* Called by \c drm_device_is_agp. Typically used to determine if a
* card is really attached to AGP or not.
* \param dev DRM device handle
* \returns
* One of three values is returned depending on whether or not the
* card is absolutely \b not AGP (return of 0), absolutely \b is AGP
* (return of 1), or may or may not be AGP (return of 2).
int (*device_is_agp) (struct drm_device *dev);
* Called by vblank timestamping code.
* Return the current display scanout position from a crtc, and an
* optional accurate ktime_get timestamp of when position was measured.
* \param dev DRM device.
* \param pipe Id of the crtc to query.
* \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
* \param *vpos Target location for current vertical scanout position.
* \param *hpos Target location for current horizontal scanout position.
* \param *stime Target location for timestamp taken immediately before
* scanout position query. Can be NULL to skip timestamp.
* \param *etime Target location for timestamp taken immediately after
* scanout position query. Can be NULL to skip timestamp.
* \param mode Current display timings.
* Returns vpos as a positive number while in active scanout area.
* Returns vpos as a negative number inside vblank, counting the number
* of scanlines to go until end of vblank, e.g., -1 means "one scanline
* until start of active scanout / end of vblank."
* \return Flags, or'ed together as follows:
* DRM_SCANOUTPOS_VALID = Query successful.
* DRM_SCANOUTPOS_INVBL = Inside vblank.
* DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
* this flag means that returned position may be offset by a constant
* but unknown small number of scanlines wrt. real scanout position.
int (*get_scanout_position) (struct drm_device *dev, unsigned int pipe,
unsigned int flags, int *vpos, int *hpos,
ktime_t *stime, ktime_t *etime,
const struct drm_display_mode *mode);
* Called by \c drm_get_last_vbltimestamp. Should return a precise
* timestamp when the most recent VBLANK interval ended or will end.
* Specifically, the timestamp in @vblank_time should correspond as
* closely as possible to the time when the first video scanline of
* the video frame after the end of VBLANK will start scanning out,
* the time immediately after end of the VBLANK interval. If the
* @crtc is currently inside VBLANK, this will be a time in the future.
* If the @crtc is currently scanning out a frame, this will be the
* past start time of the current scanout. This is meant to adhere
* to the OpenML OML_sync_control extension specification.
* \param dev dev DRM device handle.
* \param pipe crtc for which timestamp should be returned.
* \param *max_error Maximum allowable timestamp error in nanoseconds.
* Implementation should strive to provide timestamp
* with an error of at most *max_error nanoseconds.
* Returns true upper bound on error for timestamp.
* \param *vblank_time Target location for returned vblank timestamp.
* \param flags 0 = Defaults, no special treatment needed.
* \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
* irq handler. Some drivers need to apply some workarounds
* for gpu-specific vblank irq quirks if flag is set.
* \returns
* Zero if timestamping isn't supported in current display mode or a
* negative number on failure. A positive status code on success,
* which describes how the vblank_time timestamp was computed.
int (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe,
int *max_error,
struct timeval *vblank_time,
unsigned flags);
/* these have to be filled in */
irqreturn_t(*irq_handler) (int irq, void *arg);
void (*irq_preinstall) (struct drm_device *dev);
int (*irq_postinstall) (struct drm_device *dev);
void (*irq_uninstall) (struct drm_device *dev);
/* Master routines */
int (*master_create)(struct drm_device *dev, struct drm_master *master);
void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
* master_set is called whenever the minor master is set.
* master_drop is called whenever the minor master is dropped.
int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
bool from_open);
void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
int (*debugfs_init)(struct drm_minor *minor);
void (*debugfs_cleanup)(struct drm_minor *minor);
* @gem_free_object: deconstructor for drm_gem_objects
* This is deprecated and should not be used by new drivers. Use
* @gem_free_object_unlocked instead.
void (*gem_free_object) (struct drm_gem_object *obj);
* @gem_free_object_unlocked: deconstructor for drm_gem_objects
* This is for drivers which are not encumbered with dev->struct_mutex
* legacy locking schemes. Use this hook instead of @gem_free_object.
void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
* Hook for allocating the GEM object struct, for use by core
* helpers.
struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
size_t size);
/* prime: */
/* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
uint32_t handle, uint32_t flags, int *prime_fd);
/* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
int prime_fd, uint32_t *handle);
/* export GEM -> dmabuf */
struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
struct drm_gem_object *obj, int flags);
/* import dmabuf -> GEM */
struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
struct dma_buf *dma_buf);
/* low-level interface used by drm_gem_prime_{import,export} */
int (*gem_prime_pin)(struct drm_gem_object *obj);
void (*gem_prime_unpin)(struct drm_gem_object *obj);
struct reservation_object * (*gem_prime_res_obj)(
struct drm_gem_object *obj);
struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
struct drm_gem_object *(*gem_prime_import_sg_table)(
struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sgt);
void *(*gem_prime_vmap)(struct drm_gem_object *obj);
void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
int (*gem_prime_mmap)(struct drm_gem_object *obj,
struct vm_area_struct *vma);
/* vga arb irq handler */
void (*vgaarb_irq)(struct drm_device *dev, bool state);
/* dumb alloc support */
int (*dumb_create)(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
int (*dumb_map_offset)(struct drm_file *file_priv,
struct drm_device *dev, uint32_t handle,
uint64_t *offset);
int (*dumb_destroy)(struct drm_file *file_priv,
struct drm_device *dev,
uint32_t handle);
/* Driver private ops for this object */
const struct vm_operations_struct *gem_vm_ops;
int major;
int minor;
int patchlevel;
char *name;
char *desc;
char *date;
u32 driver_features;
int dev_priv_size;
const struct drm_ioctl_desc *ioctls;
int num_ioctls;
const struct file_operations *fops;
/* List of devices hanging off this driver with stealth attach. */
struct list_head legacy_dev_list;
enum drm_minor_type {
* Info file list entry. This structure represents a debugfs or proc file to
* be created by the drm core
struct drm_info_list {
const char *name; /** file name */
int (*show)(struct seq_file*, void*); /** show callback */
u32 driver_features; /**< Required driver features for this entry */
void *data;
* debugfs node structure. This structure represents a debugfs file.
struct drm_info_node {
struct list_head list;
struct drm_minor *minor;
const struct drm_info_list *info_ent;
struct dentry *dent;
* DRM minor structure. This structure represents a drm minor number.
struct drm_minor {
int index; /**< Minor device number */
int type; /**< Control or render */
struct device *kdev; /**< Linux device */
struct drm_device *dev;
struct dentry *debugfs_root;
struct list_head debugfs_list;
struct mutex debugfs_lock; /* Protects debugfs_list. */
* DRM device structure. This structure represent a complete card that
* may contain multiple heads.
struct drm_device {
struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
int if_version; /**< Highest interface version set */
/** \name Lifetime Management */
/*@{ */
struct kref ref; /**< Object ref-count */
struct device *dev; /**< Device structure of bus-device */
struct drm_driver *driver; /**< DRM driver managing the device */
void *dev_private; /**< DRM driver private data */
struct drm_minor *control; /**< Control node */
struct drm_minor *primary; /**< Primary node */
struct drm_minor *render; /**< Render node */
/* currently active master for this device. Protected by master_mutex */
struct drm_master *master;
atomic_t unplugged; /**< Flag whether dev is dead */
struct inode *anon_inode; /**< inode for private address-space */
char *unique; /**< unique name of the device */
/*@} */
/** \name Locks */
/*@{ */
struct mutex struct_mutex; /**< For others */
struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
/*@} */
/** \name Usage Counters */
/*@{ */
int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
int buf_use; /**< Buffers in use -- cannot alloc */
atomic_t buf_alloc; /**< Buffer allocation in progress */
/*@} */
struct mutex filelist_mutex;
struct list_head filelist;
/** \name Memory management */
/*@{ */
struct list_head maplist; /**< Linked list of regions */
struct drm_open_hash map_hash; /**< User token hash table for maps */
/** \name Context handle management */
/*@{ */
struct list_head ctxlist; /**< Linked list of context handles */
struct mutex ctxlist_mutex; /**< For ctxlist */
struct idr ctx_idr;
struct list_head vmalist; /**< List of vmas (for debugging) */
/*@} */
/** \name DMA support */
/*@{ */
struct drm_device_dma *dma; /**< Optional pointer for DMA support */
/*@} */
/** \name Context support */
/*@{ */
__volatile__ long context_flag; /**< Context swapping flag */
int last_context; /**< Last current context */
/*@} */
/** \name VBLANK IRQ support */
/*@{ */
bool irq_enabled;
int irq;
* If true, vblank interrupt will be disabled immediately when the
* refcount drops to zero, as opposed to via the vblank disable
* timer.
* This can be set to true it the hardware has a working vblank
* counter and the driver uses drm_vblank_on() and drm_vblank_off()
* appropriately.
bool vblank_disable_immediate;
/* array of size num_crtcs */
struct drm_vblank_crtc *vblank;
spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
spinlock_t vbl_lock;
u32 max_vblank_count; /**< size of vblank counter register */
* List of events
struct list_head vblank_event_list;
spinlock_t event_lock;
/*@} */
struct drm_agp_head *agp; /**< AGP data */
struct pci_dev *pdev; /**< PCI device structure */
#ifdef __alpha__
struct pci_controller *hose;
struct platform_device *platformdev; /**< Platform device struture */
struct virtio_device *virtdev;
struct drm_sg_mem *sg; /**< Scatter gather memory */
unsigned int num_crtcs; /**< Number of CRTCs on this device */
struct {
int context;
struct drm_hw_lock *lock;
} sigdata;
struct drm_local_map *agp_buffer_map;
unsigned int agp_buffer_token;
struct drm_mode_config mode_config; /**< Current mode config */
/** \name GEM information */
/*@{ */
struct mutex object_name_lock;
struct idr object_name_idr;
struct drm_vma_offset_manager *vma_offset_manager;
/*@} */
int switch_power_state;
#include <drm/drm_irq.h>
static __inline__ int drm_core_check_feature(struct drm_device *dev,
int feature)
return ((dev->driver->driver_features & feature) ? 1 : 0);
static inline void drm_device_set_unplugged(struct drm_device *dev)
atomic_set(&dev->unplugged, 1);
static inline int drm_device_is_unplugged(struct drm_device *dev)
int ret = atomic_read(&dev->unplugged);
return ret;
static inline bool drm_is_render_client(const struct drm_file *file_priv)
return file_priv->minor->type == DRM_MINOR_RENDER;
static inline bool drm_is_control_client(const struct drm_file *file_priv)
return file_priv->minor->type == DRM_MINOR_CONTROL;
static inline bool drm_is_primary_client(const struct drm_file *file_priv)
return file_priv->minor->type == DRM_MINOR_PRIMARY;
/** \name Internal function definitions */
/* Driver support (drm_drv.h) */
extern int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
extern long drm_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg);
extern long drm_compat_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg);
extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
/* File Operations (drm_fops.c) */
int drm_open(struct inode *inode, struct file *filp);
ssize_t drm_read(struct file *filp, char __user *buffer,
size_t count, loff_t *offset);
int drm_release(struct inode *inode, struct file *filp);
unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
int drm_event_reserve_init_locked(struct drm_device *dev,
struct drm_file *file_priv,
struct drm_pending_event *p,
struct drm_event *e);
int drm_event_reserve_init(struct drm_device *dev,
struct drm_file *file_priv,
struct drm_pending_event *p,
struct drm_event *e);
void drm_event_cancel_free(struct drm_device *dev,
struct drm_pending_event *p);
void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
/* Misc. IOCTL support (drm_ioctl.c) */
int drm_noop(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int drm_invalid_op(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* Cache management (drm_cache.c) */
void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
void drm_clflush_sg(struct sg_table *st);
void drm_clflush_virt_range(void *addr, unsigned long length);
* These are exported to drivers so that they can implement fencing using
* DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
/* Modesetting support */
extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
/* drm_drv.c */
void drm_put_dev(struct drm_device *dev);
void drm_unplug_dev(struct drm_device *dev);
extern unsigned int drm_debug;
/* Debugfs support */
#if defined(CONFIG_DEBUG_FS)
extern int drm_debugfs_create_files(const struct drm_info_list *files,
int count, struct dentry *root,
struct drm_minor *minor);
extern int drm_debugfs_remove_files(const struct drm_info_list *files,
int count, struct drm_minor *minor);
static inline int drm_debugfs_create_files(const struct drm_info_list *files,
int count, struct dentry *root,
struct drm_minor *minor)
return 0;
static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
int count, struct drm_minor *minor)
return 0;
struct dma_buf_export_info;
extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *obj,
int flags);
extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
struct drm_file *file_priv, uint32_t handle, uint32_t flags,
int *prime_fd);
extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf);
extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
struct drm_file *file_priv, int prime_fd, uint32_t *handle);
struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
struct dma_buf_export_info *exp_info);
extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
dma_addr_t *addrs, int max_pages);
extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
size_t align);
extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
/* sysfs support (drm_sysfs.c) */
extern void drm_sysfs_hotplug_event(struct drm_device *dev);
struct drm_device *drm_dev_alloc(struct drm_driver *driver,
struct device *parent);
int drm_dev_init(struct drm_device *dev,
struct drm_driver *driver,
struct device *parent);
void drm_dev_ref(struct drm_device *dev);
void drm_dev_unref(struct drm_device *dev);
int drm_dev_register(struct drm_device *dev, unsigned long flags);
void drm_dev_unregister(struct drm_device *dev);
struct drm_minor *drm_minor_acquire(unsigned int minor_id);
void drm_minor_release(struct drm_minor *minor);
/* PCI section */
static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
if (dev->driver->device_is_agp != NULL) {
int err = (*dev->driver->device_is_agp) (dev);
if (err != 2) {
return err;
return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
void drm_pci_agp_destroy(struct drm_device *dev);
extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
extern int drm_get_pci_dev(struct pci_dev *pdev,
const struct pci_device_id *ent,
struct drm_driver *driver);
extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
static inline int drm_get_pci_dev(struct pci_dev *pdev,
const struct pci_device_id *ent,
struct drm_driver *driver)
return -ENOSYS;
static inline int drm_pci_set_busid(struct drm_device *dev,
struct drm_master *master)
return -ENOSYS;
#define DRM_PCIE_SPEED_25 1
#define DRM_PCIE_SPEED_50 2
#define DRM_PCIE_SPEED_80 4
extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
extern int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw);
/* platform section */
extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
/* returns true if currently okay to sleep */
static __inline__ bool drm_can_sleep(void)
if (in_atomic() || in_dbg_master() || irqs_disabled())
return false;
return true;
/* helper for handling conditionals in various for_each macros */
#define for_each_if(condition) if (!(condition)) {} else