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drm: move to kref per-master structures.

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This is step one towards having multiple masters sharing a drm
device in order to get fast-user-switching to work.

It splits out the information associated with the drm master
into a separate kref counted structure, and allocates this when
a master opens the device node. It also allows the current master
to abdicate (say while VT switched), and a new master to take over
the hardware.

It moves the Intel and radeon drivers to using the sarea from
within the new master structures.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2008-11-28 14:22:24 +10:00
committed by Dave Airlie
parent e7f7ab45eb
commit 7c1c2871a6
21 changed files with 619 additions and 353 deletions
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64
include/drm/drmP.h
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@@ -238,11 +238,11 @@ struct drm_device;
*/
#define LOCK_TEST_WITH_RETURN( dev, file_priv ) \
do { \
if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) || \
dev->lock.file_priv != file_priv ) { \
if (!_DRM_LOCK_IS_HELD(file_priv->master->lock.hw_lock->lock) || \
file_priv->master->lock.file_priv != file_priv) { \
DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
__func__, _DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ),\
dev->lock.file_priv, file_priv ); \
__func__, _DRM_LOCK_IS_HELD(file_priv->master->lock.hw_lock->lock),\
file_priv->master->lock.file_priv, file_priv); \
return -EINVAL; \
} \
} while (0)
@@ -379,21 +379,25 @@ struct drm_buf_entry {
/** File private data */
struct drm_file {
int authenticated;
int master;
pid_t pid;
uid_t uid;
drm_magic_t magic;
unsigned long ioctl_count;
struct list_head lhead;
struct drm_minor *minor;
int remove_auth_on_close;
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;
int is_master; /* this file private is a master for a minor */
struct drm_master *master; /* master this node is currently associated with
N.B. not always minor->master */
};
/** Wait queue */
@@ -523,6 +527,7 @@ struct drm_map_list {
struct drm_hash_item hash;
struct drm_map *map; /**< mapping */
uint64_t user_token;
struct drm_master *master;
};
typedef struct drm_map drm_local_map_t;
@@ -612,6 +617,30 @@ struct drm_gem_object {
void *driver_private;
};
/* per-master structure */
struct drm_master {
struct kref refcount; /* refcount for this master */
struct list_head head; /**< each minor contains a list of masters */
struct drm_minor *minor; /**< link back to minor we are a master for */
char *unique; /**< Unique identifier: e.g., busid */
int unique_len; /**< Length of unique field */
int blocked; /**< Blocked due to VC switch? */
/** \name Authentication */
/*@{ */
struct drm_open_hash magiclist;
struct list_head magicfree;
/*@} */
struct drm_lock_data lock; /**< Information on hardware lock */
void *driver_priv; /**< Private structure for driver to use */
};
/**
* DRM driver structure. This structure represent the common code for
* a family of cards. There will one drm_device for each card present
@@ -712,6 +741,10 @@ struct drm_driver {
void (*set_version) (struct drm_device *dev,
struct drm_set_version *sv);
/* Master routines */
int (*master_create)(struct drm_device *dev, struct drm_master *master);
void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
int (*proc_init)(struct drm_minor *minor);
void (*proc_cleanup)(struct drm_minor *minor);
@@ -754,6 +787,8 @@ struct drm_minor {
struct device kdev; /**< Linux device */
struct drm_device *dev;
struct proc_dir_entry *dev_root; /**< proc directory entry */
struct drm_master *master; /* currently active master for this node */
struct list_head master_list;
};
/**
@@ -762,13 +797,9 @@ struct drm_minor {
*/
struct drm_device {
struct list_head driver_item; /**< list of devices per driver */
char *unique; /**< Unique identifier: e.g., busid */
int unique_len; /**< Length of unique field */
char *devname; /**< For /proc/interrupts */
int if_version; /**< Highest interface version set */
int blocked; /**< Blocked due to VC switch? */
/** \name Locks */
/*@{ */
spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
@@ -791,12 +822,7 @@ struct drm_device {
atomic_t counts[15];
/*@} */
/** \name Authentication */
/*@{ */
struct list_head filelist;
struct drm_open_hash magiclist; /**< magic hash table */
struct list_head magicfree;
/*@} */
/** \name Memory management */
/*@{ */
@@ -813,7 +839,6 @@ struct drm_device {
struct idr ctx_idr;
struct list_head vmalist; /**< List of vmas (for debugging) */
struct drm_lock_data lock; /**< Information on hardware lock */
/*@} */
/** \name DMA queues (contexts) */
@@ -1192,6 +1217,13 @@ extern int drm_agp_unbind_memory(DRM_AGP_MEM * handle);
extern void drm_agp_chipset_flush(struct drm_device *dev);
/* Stub support (drm_stub.h) */
extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
struct drm_master *drm_master_create(struct drm_minor *minor);
extern struct drm_master *drm_master_get(struct drm_master *master);
extern void drm_master_put(struct drm_master **master);
extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
struct drm_driver *driver);
extern int drm_put_dev(struct drm_device *dev);