From 6c7f98b334a32df5cac8abac8983ac4ce17cab57 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Mon, 11 Apr 2022 16:13:59 +0200 Subject: vfio/mdev: Remove vfio_mdev.c Now that all mdev drivers directly create their own mdev_device driver and directly register with the vfio core's vfio_device_ops this is all dead code. Delete vfio_mdev.c and the mdev_parent_ops members that are connected to it. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Signed-off-by: Zhi Wang Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-31-hch@lst.de Reviewed-by: Kirti Wankhede Reviewed-by: Zhi Wang --- include/linux/mdev.h | 48 +----------------------------------------------- 1 file changed, 1 insertion(+), 47 deletions(-) (limited to 'include') diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 15d03f6532d0..192aed656116 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -40,40 +40,7 @@ struct device *mtype_get_parent_dev(struct mdev_type *mtype); * @mdev_attr_groups: Attributes of the mediated device. * @supported_type_groups: Attributes to define supported types. It is mandatory * to provide supported types. - * @create: Called to allocate basic resources in parent device's - * driver for a particular mediated device. It is - * mandatory to provide create ops. - * @mdev: mdev_device structure on of mediated device - * that is being created - * Returns integer: success (0) or error (< 0) - * @remove: Called to free resources in parent device's driver for - * a mediated device. It is mandatory to provide 'remove' - * ops. - * @mdev: mdev_device device structure which is being - * destroyed - * Returns integer: success (0) or error (< 0) - * @read: Read emulation callback - * @mdev: mediated device structure - * @buf: read buffer - * @count: number of bytes to read - * @ppos: address. - * Retuns number on bytes read on success or error. - * @write: Write emulation callback - * @mdev: mediated device structure - * @buf: write buffer - * @count: number of bytes to be written - * @ppos: address. - * Retuns number on bytes written on success or error. - * @ioctl: IOCTL callback - * @mdev: mediated device structure - * @cmd: ioctl command - * @arg: arguments to ioctl - * @mmap: mmap callback - * @mdev: mediated device structure - * @vma: vma structure - * @request: request callback to release device - * @mdev: mediated device structure - * @count: request sequence number + * * Parent device that support mediated device should be registered with mdev * module with mdev_parent_ops structure. **/ @@ -83,19 +50,6 @@ struct mdev_parent_ops { const struct attribute_group **dev_attr_groups; const struct attribute_group **mdev_attr_groups; struct attribute_group **supported_type_groups; - - int (*create)(struct mdev_device *mdev); - int (*remove)(struct mdev_device *mdev); - int (*open_device)(struct mdev_device *mdev); - void (*close_device)(struct mdev_device *mdev); - ssize_t (*read)(struct mdev_device *mdev, char __user *buf, - size_t count, loff_t *ppos); - ssize_t (*write)(struct mdev_device *mdev, const char __user *buf, - size_t count, loff_t *ppos); - long (*ioctl)(struct mdev_device *mdev, unsigned int cmd, - unsigned long arg); - int (*mmap)(struct mdev_device *mdev, struct vm_area_struct *vma); - void (*request)(struct mdev_device *mdev, unsigned int count); }; /* interface for exporting mdev supported type attributes */ -- cgit From e6486939d8ea22569af942a1888aa3824f59cc5e Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Mon, 11 Apr 2022 16:14:00 +0200 Subject: vfio/mdev: Remove mdev_parent_ops dev_attr_groups This is only used by one sample to print a fixed string that is pointless. In general, having a device driver attach sysfs attributes to the parent is horrific. This should never happen, and always leads to some kind of liftime bug as it become very difficult for the sysfs attribute to go back to any data owned by the device driver. Remove the general mechanism to create this abuse. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Signed-off-by: Zhi Wang Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-32-hch@lst.de Reviewed-by: Kirti Wankhede Reviewed-by: Zhi Wang --- include/linux/mdev.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include') diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 192aed656116..69df1fa2cb6f 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -36,7 +36,6 @@ struct device *mtype_get_parent_dev(struct mdev_type *mtype); * * @owner: The module owner. * @device_driver: Which device driver to probe() on newly created devices - * @dev_attr_groups: Attributes of the parent device. * @mdev_attr_groups: Attributes of the mediated device. * @supported_type_groups: Attributes to define supported types. It is mandatory * to provide supported types. @@ -47,7 +46,6 @@ struct device *mtype_get_parent_dev(struct mdev_type *mtype); struct mdev_parent_ops { struct module *owner; struct mdev_driver *device_driver; - const struct attribute_group **dev_attr_groups; const struct attribute_group **mdev_attr_groups; struct attribute_group **supported_type_groups; }; -- cgit From 6b42f491e17ce13f5ff7f2d1f49c73a0f4c47b20 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Mon, 11 Apr 2022 16:14:01 +0200 Subject: vfio/mdev: Remove mdev_parent_ops The last useful member in this struct is the supported_type_groups, move it to the mdev_driver and delete mdev_parent_ops. Replace it with mdev_driver as an argument to mdev_register_device() Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Signed-off-by: Zhi Wang Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-33-hch@lst.de Reviewed-by: Kirti Wankhede Reviewed-by: Zhi Wang --- include/linux/mdev.h | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) (limited to 'include') diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 69df1fa2cb6f..1f6f57a3c316 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -30,26 +30,6 @@ unsigned int mdev_get_type_group_id(struct mdev_device *mdev); unsigned int mtype_get_type_group_id(struct mdev_type *mtype); struct device *mtype_get_parent_dev(struct mdev_type *mtype); -/** - * struct mdev_parent_ops - Structure to be registered for each parent device to - * register the device to mdev module. - * - * @owner: The module owner. - * @device_driver: Which device driver to probe() on newly created devices - * @mdev_attr_groups: Attributes of the mediated device. - * @supported_type_groups: Attributes to define supported types. It is mandatory - * to provide supported types. - * - * Parent device that support mediated device should be registered with mdev - * module with mdev_parent_ops structure. - **/ -struct mdev_parent_ops { - struct module *owner; - struct mdev_driver *device_driver; - const struct attribute_group **mdev_attr_groups; - struct attribute_group **supported_type_groups; -}; - /* interface for exporting mdev supported type attributes */ struct mdev_type_attribute { struct attribute attr; @@ -74,12 +54,15 @@ struct mdev_type_attribute mdev_type_attr_##_name = \ * struct mdev_driver - Mediated device driver * @probe: called when new device created * @remove: called when device removed + * @supported_type_groups: Attributes to define supported types. It is mandatory + * to provide supported types. * @driver: device driver structure * **/ struct mdev_driver { int (*probe)(struct mdev_device *dev); void (*remove)(struct mdev_device *dev); + struct attribute_group **supported_type_groups; struct device_driver driver; }; @@ -98,7 +81,7 @@ static inline const guid_t *mdev_uuid(struct mdev_device *mdev) extern struct bus_type mdev_bus_type; -int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops); +int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver); void mdev_unregister_device(struct device *dev); int mdev_register_driver(struct mdev_driver *drv); -- cgit From 2917f53113be3b7a0f374e02cebe6d6b749366b5 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Mon, 11 Apr 2022 16:14:03 +0200 Subject: vfio/mdev: Remove mdev drvdata This is no longer used, remove it. All usages were moved over to either use container_of() from a vfio_device or to use dev_drvdata() directly on the mdev. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Signed-off-by: Zhi Wang Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-35-hch@lst.de Reviewed-by: Kirti Wankhede Reviewed-by: Zhi Wang --- include/linux/mdev.h | 9 --------- 1 file changed, 9 deletions(-) (limited to 'include') diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 1f6f57a3c316..bb539794f54a 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -15,7 +15,6 @@ struct mdev_type; struct mdev_device { struct device dev; guid_t uuid; - void *driver_data; struct list_head next; struct mdev_type *type; bool active; @@ -66,14 +65,6 @@ struct mdev_driver { struct device_driver driver; }; -static inline void *mdev_get_drvdata(struct mdev_device *mdev) -{ - return mdev->driver_data; -} -static inline void mdev_set_drvdata(struct mdev_device *mdev, void *data) -{ - mdev->driver_data = data; -} static inline const guid_t *mdev_uuid(struct mdev_device *mdev) { return &mdev->uuid; -- cgit