1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright 2013-2017 IBM Corp.
16 #include <linux/wait.h>
31 	enum opal_async_token_state state;  member
44 	int i, token = -EBUSY;  in __opal_async_get_token()
49 		if (opal_async_tokens[i].state == ASYNC_TOKEN_UNALLOCATED) {  in __opal_async_get_token()
50 			opal_async_tokens[i].state = ASYNC_TOKEN_ALLOCATED;  in __opal_async_get_token()
70 	/* Wait until a token is available */  in opal_async_get_token_interruptible()
72 		return -ERESTARTSYS;  in opal_async_get_token_interruptible()
90 		return -EINVAL;  in __opal_async_release_token()
94 	switch (opal_async_tokens[token].state) {  in __opal_async_release_token()
97 		opal_async_tokens[token].state = ASYNC_TOKEN_UNALLOCATED;  in __opal_async_release_token()
101 	 * DISPATCHED and ABANDONED tokens must wait for OPAL to respond.  in __opal_async_release_token()
106 		opal_async_tokens[token].state = ASYNC_TOKEN_ABANDONED;  in __opal_async_release_token()
132 		return -EINVAL;  in opal_async_wait_response()
137 		return -EINVAL;  in opal_async_wait_response()
144 	 * Wakeup the poller before we wait for events to speed things  in opal_async_wait_response()
149 	wait_event(opal_async_wait, opal_async_tokens[token].state  in opal_async_wait_response()
164 		return -EINVAL;  in opal_async_wait_response_interruptible()
169 		return -EINVAL;  in opal_async_wait_response_interruptible()
178 	 * Only change if the token is ALLOCATED - it may have been  in opal_async_wait_response_interruptible()
188 	if (opal_async_tokens[token].state == ASYNC_TOKEN_ALLOCATED) {  in opal_async_wait_response_interruptible()
190 		if (opal_async_tokens[token].state == ASYNC_TOKEN_ALLOCATED)  in opal_async_wait_response_interruptible()
191 			opal_async_tokens[token].state = ASYNC_TOKEN_DISPATCHED;  in opal_async_wait_response_interruptible()
196 	 * Wakeup the poller before we wait for events to speed things  in opal_async_wait_response_interruptible()
202 			opal_async_tokens[token].state ==  in opal_async_wait_response_interruptible()
216 	enum opal_async_token_state state;  in opal_async_comp_event()  local
223 	token = be64_to_cpu(comp_msg->params[0]);  in opal_async_comp_event()
225 	state = opal_async_tokens[token].state;  in opal_async_comp_event()
226 	opal_async_tokens[token].state = ASYNC_TOKEN_COMPLETED;  in opal_async_comp_event()
229 	if (state == ASYNC_TOKEN_ABANDONED) {  in opal_async_comp_event()
255 		err = -ENOENT;  in opal_async_comp_init()
259 	async = of_get_property(opal_node, "opal-msg-async-num", NULL);  in opal_async_comp_init()
261 		pr_err("%s: %pOF has no opal-msg-async-num\n",  in opal_async_comp_init()
263 		err = -ENOENT;  in opal_async_comp_init()
271 		err = -ENOMEM;  in opal_async_comp_init()