1 // SPDX-License-Identifier: GPL-2.0-or-later
24  * virtcrypto_devmgr_add_dev() - Add vcrypto_dev to the acceleration
26  * @vcrypto_dev:  Pointer to virtio crypto device.
28  * Function adds virtio crypto device to the global list.
29  * To be used by virtio crypto device specific drivers.
42 		return -EFAULT;  in virtcrypto_devmgr_add_dev()
51 			return -EEXIST;  in virtcrypto_devmgr_add_dev()
54 	atomic_set(&vcrypto_dev->ref_count, 0);  in virtcrypto_devmgr_add_dev()
55 	list_add_tail(&vcrypto_dev->list, &virtio_crypto_table);  in virtcrypto_devmgr_add_dev()
56 	vcrypto_dev->dev_id = num_devices++;  in virtcrypto_devmgr_add_dev()
67  * virtcrypto_devmgr_rm_dev() - Remove vcrypto_dev from the acceleration
69  * @vcrypto_dev:  Pointer to virtio crypto device.
71  * Function removes virtio crypto device from the acceleration framework.
72  * To be used by virtio crypto device specific drivers.
79 	list_del(&vcrypto_dev->list);  in virtcrypto_devmgr_rm_dev()
80 	num_devices--;  in virtcrypto_devmgr_rm_dev()
87  * Function returns the first virtio crypto device from the acceleration
90  * To be used by virtio crypto device specific drivers.
108  * virtcrypto_dev_in_use() - Check whether vcrypto_dev is currently in use
109  * @vcrypto_dev: Pointer to virtio crypto device.
111  * To be used by virtio crypto device specific drivers.
113  * Return: 1 when device is in use, 0 otherwise.
117 	return atomic_read(&vcrypto_dev->ref_count) != 0;  in virtcrypto_dev_in_use()
121  * virtcrypto_dev_get() - Increment vcrypto_dev reference count
122  * @vcrypto_dev: Pointer to virtio crypto device.
127  * To be used by virtio crypto device specific drivers.
133 	if (atomic_add_return(1, &vcrypto_dev->ref_count) == 1)  in virtcrypto_dev_get()
134 		if (!try_module_get(vcrypto_dev->owner))  in virtcrypto_dev_get()
135 			return -EFAULT;  in virtcrypto_dev_get()
140  * virtcrypto_dev_put() - Decrement vcrypto_dev reference count
141  * @vcrypto_dev: Pointer to virtio crypto device.
146  * To be used by virtio crypto device specific drivers.
152 	if (atomic_sub_return(1, &vcrypto_dev->ref_count) == 0)  in virtcrypto_dev_put()
153 		module_put(vcrypto_dev->owner);  in virtcrypto_dev_put()
157  * virtcrypto_dev_started() - Check whether device has started
158  * @vcrypto_dev: Pointer to virtio crypto device.
160  * To be used by virtio crypto device specific drivers.
162  * Return: 1 when the device has started, 0 otherwise
166 	return (vcrypto_dev->status & VIRTIO_CRYPTO_S_HW_READY);  in virtcrypto_dev_started()
170  * virtcrypto_get_dev_node() - Get vcrypto_dev on the node.
177  * Function returns the virtio crypto device used fewest on the node,
180  * To be used by virtio crypto device specific drivers.
194 		if ((node == dev_to_node(&tmp_dev->vdev->dev) ||  in virtcrypto_get_dev_node()
195 		     dev_to_node(&tmp_dev->vdev->dev) < 0) &&  in virtcrypto_get_dev_node()
198 			ctr = atomic_read(&tmp_dev->ref_count);  in virtcrypto_get_dev_node()
207 		pr_info("virtio_crypto: Could not find a device on node %d\n",  in virtcrypto_get_dev_node()
209 		/* Get any started device */  in virtcrypto_get_dev_node()
229  * virtcrypto_dev_start() - Start virtio crypto device
230  * @vcrypto:    Pointer to virtio crypto device.
232  * Function notifies all the registered services that the virtio crypto device
234  * To be used by virtio crypto device specific drivers.
242 		return -EFAULT;  in virtcrypto_dev_start()
248 		return -EFAULT;  in virtcrypto_dev_start()
255  * virtcrypto_dev_stop() - Stop virtio crypto device
256  * @vcrypto:    Pointer to virtio crypto device.
258  * Function notifies all the registered services that the virtio crypto device
260  * To be used by virtio crypto device specific drivers.
272  * @vcrypto: Pointer to virtio crypto device.
278  * Validate if the virtio crypto device supports a service and
281  * Return true if device supports a service and algo.
293 		algo -= 32;  in virtcrypto_algo_is_supported()
297 	if (!(vcrypto->crypto_services & service_mask))  in virtcrypto_algo_is_supported()
303 			algo_mask = vcrypto->cipher_algo_l;  in virtcrypto_algo_is_supported()
305 			algo_mask = vcrypto->cipher_algo_h;  in virtcrypto_algo_is_supported()
309 		algo_mask = vcrypto->hash_algo;  in virtcrypto_algo_is_supported()
314 			algo_mask = vcrypto->mac_algo_l;  in virtcrypto_algo_is_supported()
316 			algo_mask = vcrypto->mac_algo_h;  in virtcrypto_algo_is_supported()
320 		algo_mask = vcrypto->aead_algo;  in virtcrypto_algo_is_supported()
324 		algo_mask = vcrypto->akcipher_algo;  in virtcrypto_algo_is_supported()