diff options
Diffstat (limited to 'drivers/vfio/mdev')
| -rw-r--r-- | drivers/vfio/mdev/mdev_core.c | 100 | ||||
| -rw-r--r-- | drivers/vfio/mdev/mdev_private.h | 29 | ||||
| -rw-r--r-- | drivers/vfio/mdev/mdev_sysfs.c | 8 | ||||
| -rw-r--r-- | drivers/vfio/mdev/vfio_mdev.c | 12 |
4 files changed, 120 insertions, 29 deletions
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index be1ee89ee917..36d75c367d22 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -27,6 +27,45 @@ static LIST_HEAD(parent_list); static DEFINE_MUTEX(parent_list_lock); static struct class_compat *mdev_bus_compat_class; +static LIST_HEAD(mdev_list); +static DEFINE_MUTEX(mdev_list_lock); + +struct device *mdev_parent_dev(struct mdev_device *mdev) +{ + return mdev->parent->dev; +} +EXPORT_SYMBOL(mdev_parent_dev); + +void *mdev_get_drvdata(struct mdev_device *mdev) +{ + return mdev->driver_data; +} +EXPORT_SYMBOL(mdev_get_drvdata); + +void mdev_set_drvdata(struct mdev_device *mdev, void *data) +{ + mdev->driver_data = data; +} +EXPORT_SYMBOL(mdev_set_drvdata); + +struct device *mdev_dev(struct mdev_device *mdev) +{ + return &mdev->dev; +} +EXPORT_SYMBOL(mdev_dev); + +struct mdev_device *mdev_from_dev(struct device *dev) +{ + return dev_is_mdev(dev) ? to_mdev_device(dev) : NULL; +} +EXPORT_SYMBOL(mdev_from_dev); + +uuid_le mdev_uuid(struct mdev_device *mdev) +{ + return mdev->uuid; +} +EXPORT_SYMBOL(mdev_uuid); + static int _find_mdev_device(struct device *dev, void *data) { struct mdev_device *mdev; @@ -42,7 +81,7 @@ static int _find_mdev_device(struct device *dev, void *data) return 0; } -static bool mdev_device_exist(struct parent_device *parent, uuid_le uuid) +static bool mdev_device_exist(struct mdev_parent *parent, uuid_le uuid) { struct device *dev; @@ -56,9 +95,9 @@ static bool mdev_device_exist(struct parent_device *parent, uuid_le uuid) } /* Should be called holding parent_list_lock */ -static struct parent_device *__find_parent_device(struct device *dev) +static struct mdev_parent *__find_parent_device(struct device *dev) { - struct parent_device *parent; + struct mdev_parent *parent; list_for_each_entry(parent, &parent_list, next) { if (parent->dev == dev) @@ -69,8 +108,8 @@ static struct parent_device *__find_parent_device(struct device *dev) static void mdev_release_parent(struct kref *kref) { - struct parent_device *parent = container_of(kref, struct parent_device, - ref); + struct mdev_parent *parent = container_of(kref, struct mdev_parent, + ref); struct device *dev = parent->dev; kfree(parent); @@ -78,7 +117,7 @@ static void mdev_release_parent(struct kref *kref) } static -inline struct parent_device *mdev_get_parent(struct parent_device *parent) +inline struct mdev_parent *mdev_get_parent(struct mdev_parent *parent) { if (parent) kref_get(&parent->ref); @@ -86,7 +125,7 @@ inline struct parent_device *mdev_get_parent(struct parent_device *parent) return parent; } -static inline void mdev_put_parent(struct parent_device *parent) +static inline void mdev_put_parent(struct mdev_parent *parent) { if (parent) kref_put(&parent->ref, mdev_release_parent); @@ -95,7 +134,7 @@ static inline void mdev_put_parent(struct parent_device *parent) static int mdev_device_create_ops(struct kobject *kobj, struct mdev_device *mdev) { - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; int ret; ret = parent->ops->create(kobj, mdev); @@ -122,7 +161,7 @@ static int mdev_device_create_ops(struct kobject *kobj, */ static int mdev_device_remove_ops(struct mdev_device *mdev, bool force_remove) { - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; int ret; /* @@ -153,10 +192,10 @@ static int mdev_device_remove_cb(struct device *dev, void *data) * Add device to list of registered parent devices. * Returns a negative value on error, otherwise 0. */ -int mdev_register_device(struct device *dev, const struct parent_ops *ops) +int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops) { int ret; - struct parent_device *parent; + struct mdev_parent *parent; /* check for mandatory ops */ if (!ops || !ops->create || !ops->remove || !ops->supported_type_groups) @@ -229,7 +268,7 @@ EXPORT_SYMBOL(mdev_register_device); void mdev_unregister_device(struct device *dev) { - struct parent_device *parent; + struct mdev_parent *parent; bool force_remove = true; mutex_lock(&parent_list_lock); @@ -266,7 +305,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid) { int ret; struct mdev_device *mdev; - struct parent_device *parent; + struct mdev_parent *parent; struct mdev_type *type = to_mdev_type(kobj); parent = mdev_get_parent(type->parent); @@ -316,6 +355,11 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid) dev_dbg(&mdev->dev, "MDEV: created\n"); mutex_unlock(&parent->lock); + + mutex_lock(&mdev_list_lock); + list_add(&mdev->next, &mdev_list); + mutex_unlock(&mdev_list_lock); + return ret; create_failed: @@ -329,12 +373,30 @@ create_err: int mdev_device_remove(struct device *dev, bool force_remove) { - struct mdev_device *mdev; - struct parent_device *parent; + struct mdev_device *mdev, *tmp; + struct mdev_parent *parent; struct mdev_type *type; int ret; + bool found = false; mdev = to_mdev_device(dev); + + mutex_lock(&mdev_list_lock); + list_for_each_entry(tmp, &mdev_list, next) { + if (tmp == mdev) { + found = true; + break; + } + } + + if (found) + list_del(&mdev->next); + + mutex_unlock(&mdev_list_lock); + + if (!found) + return -ENODEV; + type = to_mdev_type(mdev->type_kobj); parent = mdev->parent; mutex_lock(&parent->lock); @@ -342,6 +404,11 @@ int mdev_device_remove(struct device *dev, bool force_remove) ret = mdev_device_remove_ops(mdev, force_remove); if (ret) { mutex_unlock(&parent->lock); + + mutex_lock(&mdev_list_lock); + list_add(&mdev->next, &mdev_list); + mutex_unlock(&mdev_list_lock); + return ret; } @@ -349,7 +416,8 @@ int mdev_device_remove(struct device *dev, bool force_remove) device_unregister(dev); mutex_unlock(&parent->lock); mdev_put_parent(parent); - return ret; + + return 0; } static int __init mdev_init(void) diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h index d35097cbf3d7..a9cefd70a705 100644 --- a/drivers/vfio/mdev/mdev_private.h +++ b/drivers/vfio/mdev/mdev_private.h @@ -16,10 +16,33 @@ int mdev_bus_register(void); void mdev_bus_unregister(void); +struct mdev_parent { + struct device *dev; + const struct mdev_parent_ops *ops; + struct kref ref; + struct mutex lock; + struct list_head next; + struct kset *mdev_types_kset; + struct list_head type_list; +}; + +struct mdev_device { + struct device dev; + struct mdev_parent *parent; + uuid_le uuid; + void *driver_data; + struct kref ref; + struct list_head next; + struct kobject *type_kobj; +}; + +#define to_mdev_device(dev) container_of(dev, struct mdev_device, dev) +#define dev_is_mdev(d) ((d)->bus == &mdev_bus_type) + struct mdev_type { struct kobject kobj; struct kobject *devices_kobj; - struct parent_device *parent; + struct mdev_parent *parent; struct list_head next; struct attribute_group *group; }; @@ -29,8 +52,8 @@ struct mdev_type { #define to_mdev_type(_kobj) \ container_of(_kobj, struct mdev_type, kobj) -int parent_create_sysfs_files(struct parent_device *parent); -void parent_remove_sysfs_files(struct parent_device *parent); +int parent_create_sysfs_files(struct mdev_parent *parent); +void parent_remove_sysfs_files(struct mdev_parent *parent); int mdev_create_sysfs_files(struct device *dev, struct mdev_type *type); void mdev_remove_sysfs_files(struct device *dev, struct mdev_type *type); diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 1a53deb2ee10..802df210929b 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -92,7 +92,7 @@ static struct kobj_type mdev_type_ktype = { .release = mdev_type_release, }; -struct mdev_type *add_mdev_supported_type(struct parent_device *parent, +struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent, struct attribute_group *group) { struct mdev_type *type; @@ -158,7 +158,7 @@ static void remove_mdev_supported_type(struct mdev_type *type) kobject_put(&type->kobj); } -static int add_mdev_supported_type_groups(struct parent_device *parent) +static int add_mdev_supported_type_groups(struct mdev_parent *parent) { int i; @@ -183,7 +183,7 @@ static int add_mdev_supported_type_groups(struct parent_device *parent) } /* mdev sysfs functions */ -void parent_remove_sysfs_files(struct parent_device *parent) +void parent_remove_sysfs_files(struct mdev_parent *parent) { struct mdev_type *type, *tmp; @@ -196,7 +196,7 @@ void parent_remove_sysfs_files(struct parent_device *parent) kset_unregister(parent->mdev_types_kset); } -int parent_create_sysfs_files(struct parent_device *parent) +int parent_create_sysfs_files(struct mdev_parent *parent) { int ret; diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c index ffc36758cb84..fa848a701b8b 100644 --- a/drivers/vfio/mdev/vfio_mdev.c +++ b/drivers/vfio/mdev/vfio_mdev.c @@ -27,7 +27,7 @@ static int vfio_mdev_open(void *device_data) { struct mdev_device *mdev = device_data; - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; int ret; if (unlikely(!parent->ops->open)) @@ -46,7 +46,7 @@ static int vfio_mdev_open(void *device_data) static void vfio_mdev_release(void *device_data) { struct mdev_device *mdev = device_data; - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; if (likely(parent->ops->release)) parent->ops->release(mdev); @@ -58,7 +58,7 @@ static long vfio_mdev_unlocked_ioctl(void *device_data, unsigned int cmd, unsigned long arg) { struct mdev_device *mdev = device_data; - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; if (unlikely(!parent->ops->ioctl)) return -EINVAL; @@ -70,7 +70,7 @@ static ssize_t vfio_mdev_read(void *device_data, char __user *buf, size_t count, loff_t *ppos) { struct mdev_device *mdev = device_data; - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; if (unlikely(!parent->ops->read)) return -EINVAL; @@ -82,7 +82,7 @@ static ssize_t vfio_mdev_write(void *device_data, const char __user *buf, size_t count, loff_t *ppos) { struct mdev_device *mdev = device_data; - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; if (unlikely(!parent->ops->write)) return -EINVAL; @@ -93,7 +93,7 @@ static ssize_t vfio_mdev_write(void *device_data, const char __user *buf, static int vfio_mdev_mmap(void *device_data, struct vm_area_struct *vma) { struct mdev_device *mdev = device_data; - struct parent_device *parent = mdev->parent; + struct mdev_parent *parent = mdev->parent; if (unlikely(!parent->ops->mmap)) return -EINVAL; |