1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2015-2021, Linaro Limited
37 	shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE,  in optee_pool_op_alloc_helper()
39 	if (!shm->kaddr)  in optee_pool_op_alloc_helper()
40 		return -ENOMEM;  in optee_pool_op_alloc_helper()
42 	shm->paddr = virt_to_phys(shm->kaddr);  in optee_pool_op_alloc_helper()
43 	shm->size = nr_pages * PAGE_SIZE;  in optee_pool_op_alloc_helper()
47 		rc = -ENOMEM;  in optee_pool_op_alloc_helper()
52 		pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE);  in optee_pool_op_alloc_helper()
54 	shm->pages = pages;  in optee_pool_op_alloc_helper()
55 	shm->num_pages = nr_pages;  in optee_pool_op_alloc_helper()
58 		rc = shm_register(shm->ctx, shm, pages, nr_pages,  in optee_pool_op_alloc_helper()
59 				  (unsigned long)shm->kaddr);  in optee_pool_op_alloc_helper()
66 	free_pages_exact(shm->kaddr, shm->size);  in optee_pool_op_alloc_helper()
67 	shm->kaddr = NULL;  in optee_pool_op_alloc_helper()
76 		shm_unregister(shm->ctx, shm);  in optee_pool_op_free_helper()
77 	free_pages_exact(shm->kaddr, shm->size);  in optee_pool_op_free_helper()
78 	shm->kaddr = NULL;  in optee_pool_op_free_helper()
79 	kfree(shm->pages);  in optee_pool_op_free_helper()
80 	shm->pages = NULL;  in optee_pool_op_free_helper()
91 	struct tee_device *teedev = ctx->teedev;  in optee_open()
96 		return -ENOMEM;  in optee_open()
98 	if (teedev == optee->supp_teedev) {  in optee_open()
101 		mutex_lock(&optee->supp.mutex);  in optee_open()
102 		if (!optee->supp.ctx) {  in optee_open()
104 			optee->supp.ctx = ctx;  in optee_open()
106 		mutex_unlock(&optee->supp.mutex);  in optee_open()
109 			return -EBUSY;  in optee_open()
112 		if (!optee->scan_bus_done) {  in optee_open()
113 			INIT_WORK(&optee->scan_bus_work, optee_bus_scan);  in optee_open()
114 			schedule_work(&optee->scan_bus_work);  in optee_open()
115 			optee->scan_bus_done = true;  in optee_open()
118 	mutex_init(&ctxdata->mutex);  in optee_open()
119 	INIT_LIST_HEAD(&ctxdata->sess_list);  in optee_open()
121 	ctx->cap_memref_null = cap_memref_null;  in optee_open()
122 	ctx->data = ctxdata;  in optee_open()
131 	struct optee_context_data *ctxdata = ctx->data;  in optee_release_helper()
138 	list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list,  in optee_release_helper()
140 		list_del(&sess->list_node);  in optee_release_helper()
141 		close_session(ctx, sess->session_id, sess->use_sys_thread);  in optee_release_helper()
145 	ctx->data = NULL;  in optee_release_helper()
155 	struct optee *optee = tee_get_drvdata(ctx->teedev);  in optee_release_supp()
159 	optee_supp_release(&optee->supp);  in optee_release_supp()
164 	/* Unregister OP-TEE specific client devices on TEE bus */  in optee_remove_common()
169 	teedev_close_context(optee->ctx);  in optee_remove_common()
174 	tee_device_unregister(optee->supp_teedev);  in optee_remove_common()
175 	tee_device_unregister(optee->teedev);  in optee_remove_common()
177 	tee_shm_pool_free(optee->pool);  in optee_remove_common()
178 	optee_supp_uninit(&optee->supp);  in optee_remove_common()
179 	mutex_destroy(&optee->call_queue.mutex);  in optee_remove_common()
191 	 * Therefore, we cannot reliably initialize the OP-TEE driver in the  in optee_core_init()
195 		return -ENODEV;  in optee_core_init()
217 MODULE_DESCRIPTION("OP-TEE driver");