include/linux/vdpa.h

6 #include <linux/device.h>
48  * @last_avail_counter: last driver ring wrap counter observed by device
49  * @last_avail_idx: device available index
50  * @last_used_counter: device ring wrap counter
70  * struct vdpa_device - representation of a vDPA device
71  * @dev: underlying device
72  * @dma_dev: the actual device that is performing DMA
76  * @config: the configuration ops for this device.
78  * @index: device index
82  * @use_va: indicate whether virtual address must be used by this device
84  * @mdev: management device pointer; caller must setup when registering device as part
88 	struct device dev;
89 	struct device *dma_dev;
103  * struct vdpa_iova_range - the IOVA range support by the device
123  * struct vdpa_map_file - file area for device memory mapping
133  * struct vdpa_config_ops - operations for configuring a vDPA device.
134  * Note: vDPA device drivers are required to implement all of the
139  *				@vdev: vdpa device
143  *				@device_area: address of device area
146  *				@vdev: vdpa device
150  *				@vdev: vdpa device
154  *				@vdev: vdpa device
162  *				@vdev: vdpa device
166  *				@vdev: vdpa device
170  *				@vdev: vdpa device
174  *				@vdev: vdpa device
179  *				@vdev: vdpa device
182  * @get_vendor_vq_stats:	Get the vendor statistics of a device.
183  *				@vdev: vdpa device
189  *				@vdev: vdpa device
194  *				@vdev: vdpa device
199  *				for the device
200  *				@vdev: vdpa device
204  *				@vdev: vdpa device
209  *				@vdev: vdpa device
217  * @get_device_features:	Get virtio features supported by the device
218  *				@vdev: vdpa device
220  *				device
223  *				device.
225  *				@vdev: vdpa device
229  *				@vdev: vdpa device
232  *				@vdev: vdpa device
235  *				@vdev: vdpa device
238  *				@vdev: vdpa device
240  * @get_device_id:		Get virtio device id
241  *				@vdev: vdpa device
242  *				Returns u32: virtio device id
243  * @get_vendor_id:		Get id for the vendor that provides this device
244  *				@vdev: vdpa device
246  * @get_status:			Get the device status
247  *				@vdev: vdpa device
248  *				Returns u8: virtio device status
249  * @set_status:			Set the device status
250  *				@vdev: vdpa device
251  *				@status: virtio device status
252  * @reset:			Reset device
253  *				@vdev: vdpa device
255  * @compat_reset:		Reset device with compatibility quirks to
263  *				@vdev: vdpa device
266  * @suspend:			Suspend the device (optional)
267  *				@vdev: vdpa device
269  * @resume:			Resume the device (optional)
270  *				@vdev: vdpa device
274  *				@vdev: vdpa device
276  * @get_config:			Read from device specific configuration space
277  *				@vdev: vdpa device
283  * @set_config:			Write to device specific configuration space
284  *				@vdev: vdpa device
290  * @get_generation:		Get device config generation (optional)
291  *				@vdev: vdpa device
292  *				Returns u32: device generation
294  *				@vdev: vdpa device
296  *				the device.
298  *				@vdev: vdpa device
303  *				@vdev: vdpa device
308  *				@vdev: vdpa device
312  * @set_map:			Set device memory mapping (optional)
313  *				Needed for device that using device
315  *				@vdev: vdpa device
321  *				Needed for device that using device
324  *				@vdev: vdpa device
329  *				@perm: device access permission (VHOST_MAP_XX)
333  *				Needed for device that using device
336  *				@vdev: vdpa device
341  * @reset_map:			Reset device memory mapping to the default
343  *				Needed for devices that are using device
346  *				i.e. device .reset op does not reset mapping
347  *				@vdev: vdpa device
350  * @get_vq_dma_dev:		Get the dma device for a specific
352  *				@vdev: vdpa device
354  *				Returns pointer to structure device or error (NULL)
355  * @bind_mm:			Bind the device to a specific address space
358  *				@vdev: vdpa device
360  * @unbind_mm:			Unbind the device from the address space
362  *				@vdev: vdpa device
364  *				@vdev: vdpa device
390 	/* Device ops */
433 	struct device *(*get_vq_dma_dev)(struct vdpa_device *vdev, u16 idx);
437 	/* Free device resources */
441 struct vdpa_device *__vdpa_alloc_device(struct device *parent,
448  * vdpa_alloc_device - allocate and initilaize a vDPA device
452  * @parent: the parent device
453  * @config: the bus operations that is supported by this device
454  * @ngroups: the number of virtqueue groups supported by this device
456  * @name: name of the vdpa device
457  * @use_va: indicate whether virtual address must be used by this device
478  * @driver: underlying device driver
479  * @probe: the function to call when a device is found.  Returns 0 or -errno.
480  * @remove: the function to call when a device is removed.
502 static inline struct vdpa_device *dev_to_vdpa(struct device *_dev)  in dev_to_vdpa()
517 static inline struct device *vdpa_get_dma_dev(struct vdpa_device *vdev)  in vdpa_get_dma_dev()
566  * struct vdpa_mgmtdev_ops - vdpa device ops
567  * @dev_add: Add a vdpa device using alloc and register
568  *	     @mdev: parent device to use for device addition
569  *	     @name: name of the new vdpa device
570  *	     @config: config attributes to apply to the device under creation
571  *	     Driver need to add a new device using _vdpa_register_device()
572  *	     after fully initializing the vdpa device. Driver must return 0
574  * @dev_del: Remove a vdpa device using unregister
575  *	     @mdev: parent device to use for device removal
576  *	     @dev: vdpa device to remove
577  *	     Driver need to remove the specified device by calling
587  * struct vdpa_mgmt_dev - vdpa management device
588  * @device: Management parent device
589  * @ops: operations supported by management device
590  * @id_table: Pointer to device id table of supported ids
592  *		      management device support during dev_add callback
594  * @supported_features: features supported by device
595  * @max_supported_vqs: maximum number of virtqueues supported by device
598 	struct device *device;  member