platforms/powernv/opal-async.c

44 	int i, token = -EBUSY;
51 			token = i;
57 	return token;
61  * Note: If the returned token is used in an opal call and opal returns
68 	int token;
70 	/* Wait until a token is available */
74 	token = __opal_async_get_token();
75 	if (token < 0)
78 	return token;
82 static int __opal_async_release_token(int token)
87 	if (token < 0 || token >= opal_max_async_tokens) {
88 		pr_err("%s: Passed token is out of range, token %d\n",
89 				__func__, token);
94 	switch (opal_async_tokens[token].state) {
97 		opal_async_tokens[token].state = ASYNC_TOKEN_UNALLOCATED;
102 	 * Mark a DISPATCHED token as ABANDONED so that the response handling
106 		opal_async_tokens[token].state = ASYNC_TOKEN_ABANDONED;
116 int opal_async_release_token(int token)
120 	ret = __opal_async_release_token(token);
128 int opal_async_wait_response(uint64_t token, struct opal_msg *msg)
130 	if (token >= opal_max_async_tokens) {
131 		pr_err("%s: Invalid token passed\n", __func__);
141 	 * There is no need to mark the token as dispatched, wait_event()
142 	 * will block until the token completes.
149 	wait_event(opal_async_wait, opal_async_tokens[token].state
151 	memcpy(msg, &opal_async_tokens[token].response, sizeof(*msg));
157 int opal_async_wait_response_interruptible(uint64_t token, struct opal_msg *msg)
162 	if (token >= opal_max_async_tokens) {
163 		pr_err("%s: Invalid token passed\n", __func__);
173 	 * The first time this gets called we mark the token as DISPATCHED
175 	 * caller frees the token, we know not to actually free the token
178 	 * Only change if the token is ALLOCATED - it may have been
182 	 * There is also a dirty great comment at the token allocation
186 	 * token.
188 	if (opal_async_tokens[token].state == ASYNC_TOKEN_ALLOCATED) {
190 		if (opal_async_tokens[token].state == ASYNC_TOKEN_ALLOCATED)
191 			opal_async_tokens[token].state = ASYNC_TOKEN_DISPATCHED;
202 			opal_async_tokens[token].state ==
205 		memcpy(msg, &opal_async_tokens[token].response, sizeof(*msg));
218 	uint64_t token;
223 	token = be64_to_cpu(comp_msg->params[0]);
225 	state = opal_async_tokens[token].state;
226 	opal_async_tokens[token].state = ASYNC_TOKEN_COMPLETED;
230 		/* Free the token, no one else will */
231 		opal_async_release_token(token);
234 	memcpy(&opal_async_tokens[token].response, comp_msg, sizeof(*comp_msg));