xref: /linux/drivers/s390/net/qeth_l2_sys.c (revision 9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  *    Copyright IBM Corp. 2013
4  *    Author(s): Eugene Crosser <eugene.crosser@ru.ibm.com>
5  */
6 
7 #include <linux/slab.h>
8 #include <asm/ebcdic.h>
9 #include "qeth_core.h"
10 #include "qeth_l2.h"
11 
qeth_bridge_port_role_state_show(struct device * dev,struct device_attribute * attr,char * buf,int show_state)12 static ssize_t qeth_bridge_port_role_state_show(struct device *dev,
13 				struct device_attribute *attr, char *buf,
14 				int show_state)
15 {
16 	struct qeth_card *card = dev_get_drvdata(dev);
17 	enum qeth_sbp_states state = QETH_SBP_STATE_INACTIVE;
18 	int rc = 0;
19 	char *word;
20 
21 	if (!qeth_bridgeport_allowed(card))
22 		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
23 
24 	mutex_lock(&card->sbp_lock);
25 	if (qeth_card_hw_is_reachable(card) &&
26 					card->options.sbp.supported_funcs)
27 		rc = qeth_bridgeport_query_ports(card,
28 			&card->options.sbp.role, &state);
29 	if (!rc) {
30 		if (show_state)
31 			switch (state) {
32 			case QETH_SBP_STATE_INACTIVE:
33 				word = "inactive"; break;
34 			case QETH_SBP_STATE_STANDBY:
35 				word = "standby"; break;
36 			case QETH_SBP_STATE_ACTIVE:
37 				word = "active"; break;
38 			default:
39 				rc = -EIO;
40 			}
41 		else
42 			switch (card->options.sbp.role) {
43 			case QETH_SBP_ROLE_NONE:
44 				word = "none"; break;
45 			case QETH_SBP_ROLE_PRIMARY:
46 				word = "primary"; break;
47 			case QETH_SBP_ROLE_SECONDARY:
48 				word = "secondary"; break;
49 			default:
50 				rc = -EIO;
51 			}
52 		if (rc)
53 			QETH_CARD_TEXT_(card, 2, "SBP%02x:%02x",
54 				card->options.sbp.role, state);
55 		else
56 			rc = sysfs_emit(buf, "%s\n", word);
57 	}
58 	mutex_unlock(&card->sbp_lock);
59 
60 	return rc;
61 }
62 
qeth_bridge_port_role_show(struct device * dev,struct device_attribute * attr,char * buf)63 static ssize_t qeth_bridge_port_role_show(struct device *dev,
64 				struct device_attribute *attr, char *buf)
65 {
66 	struct qeth_card *card = dev_get_drvdata(dev);
67 
68 	if (!qeth_bridgeport_allowed(card))
69 		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
70 
71 	return qeth_bridge_port_role_state_show(dev, attr, buf, 0);
72 }
73 
qeth_bridge_port_role_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)74 static ssize_t qeth_bridge_port_role_store(struct device *dev,
75 		struct device_attribute *attr, const char *buf, size_t count)
76 {
77 	struct qeth_card *card = dev_get_drvdata(dev);
78 	int rc = 0;
79 	enum qeth_sbp_roles role;
80 
81 	if (sysfs_streq(buf, "primary"))
82 		role = QETH_SBP_ROLE_PRIMARY;
83 	else if (sysfs_streq(buf, "secondary"))
84 		role = QETH_SBP_ROLE_SECONDARY;
85 	else if (sysfs_streq(buf, "none"))
86 		role = QETH_SBP_ROLE_NONE;
87 	else
88 		return -EINVAL;
89 
90 	mutex_lock(&card->conf_mutex);
91 	mutex_lock(&card->sbp_lock);
92 
93 	if (!qeth_bridgeport_allowed(card))
94 		rc = -EBUSY;
95 	else if (card->options.sbp.reflect_promisc)
96 		/* Forbid direct manipulation */
97 		rc = -EPERM;
98 	else if (qeth_card_hw_is_reachable(card)) {
99 		rc = qeth_bridgeport_setrole(card, role);
100 		if (!rc)
101 			card->options.sbp.role = role;
102 	} else
103 		card->options.sbp.role = role;
104 
105 	mutex_unlock(&card->sbp_lock);
106 	mutex_unlock(&card->conf_mutex);
107 
108 	return rc ? rc : count;
109 }
110 
111 static DEVICE_ATTR(bridge_role, 0644, qeth_bridge_port_role_show,
112 		   qeth_bridge_port_role_store);
113 
qeth_bridge_port_state_show(struct device * dev,struct device_attribute * attr,char * buf)114 static ssize_t qeth_bridge_port_state_show(struct device *dev,
115 				struct device_attribute *attr, char *buf)
116 {
117 	struct qeth_card *card = dev_get_drvdata(dev);
118 
119 	if (!qeth_bridgeport_allowed(card))
120 		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
121 
122 	return qeth_bridge_port_role_state_show(dev, attr, buf, 1);
123 }
124 
125 static DEVICE_ATTR(bridge_state, 0444, qeth_bridge_port_state_show,
126 		   NULL);
127 
qeth_bridgeport_hostnotification_show(struct device * dev,struct device_attribute * attr,char * buf)128 static ssize_t qeth_bridgeport_hostnotification_show(struct device *dev,
129 				struct device_attribute *attr, char *buf)
130 {
131 	struct qeth_card *card = dev_get_drvdata(dev);
132 	int enabled;
133 
134 	if (!qeth_bridgeport_allowed(card))
135 		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
136 
137 	enabled = card->options.sbp.hostnotification;
138 
139 	return sysfs_emit(buf, "%d\n", enabled);
140 }
141 
qeth_bridgeport_hostnotification_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)142 static ssize_t qeth_bridgeport_hostnotification_store(struct device *dev,
143 		struct device_attribute *attr, const char *buf, size_t count)
144 {
145 	struct qeth_card *card = dev_get_drvdata(dev);
146 	bool enable;
147 	int rc;
148 
149 	rc = kstrtobool(buf, &enable);
150 	if (rc)
151 		return rc;
152 
153 	mutex_lock(&card->conf_mutex);
154 	mutex_lock(&card->sbp_lock);
155 
156 	if (!qeth_bridgeport_allowed(card))
157 		rc = -EBUSY;
158 	else if (qeth_card_hw_is_reachable(card)) {
159 		rc = qeth_bridgeport_an_set(card, enable);
160 		/* sbp_lock ensures ordering vs notifications-stopped events */
161 		if (!rc)
162 			card->options.sbp.hostnotification = enable;
163 	} else
164 		card->options.sbp.hostnotification = enable;
165 
166 	mutex_unlock(&card->sbp_lock);
167 	mutex_unlock(&card->conf_mutex);
168 
169 	return rc ? rc : count;
170 }
171 
172 static DEVICE_ATTR(bridge_hostnotify, 0644,
173 			qeth_bridgeport_hostnotification_show,
174 			qeth_bridgeport_hostnotification_store);
175 
qeth_bridgeport_reflect_show(struct device * dev,struct device_attribute * attr,char * buf)176 static ssize_t qeth_bridgeport_reflect_show(struct device *dev,
177 				struct device_attribute *attr, char *buf)
178 {
179 	struct qeth_card *card = dev_get_drvdata(dev);
180 	char *state;
181 
182 	if (!qeth_bridgeport_allowed(card))
183 		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
184 
185 	if (card->options.sbp.reflect_promisc) {
186 		if (card->options.sbp.reflect_promisc_primary)
187 			state = "primary";
188 		else
189 			state = "secondary";
190 	} else
191 		state = "none";
192 
193 	return sysfs_emit(buf, "%s\n", state);
194 }
195 
qeth_bridgeport_reflect_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)196 static ssize_t qeth_bridgeport_reflect_store(struct device *dev,
197 		struct device_attribute *attr, const char *buf, size_t count)
198 {
199 	struct qeth_card *card = dev_get_drvdata(dev);
200 	int enable, primary;
201 	int rc = 0;
202 
203 	if (sysfs_streq(buf, "none")) {
204 		enable = 0;
205 		primary = 0;
206 	} else if (sysfs_streq(buf, "primary")) {
207 		enable = 1;
208 		primary = 1;
209 	} else if (sysfs_streq(buf, "secondary")) {
210 		enable = 1;
211 		primary = 0;
212 	} else
213 		return -EINVAL;
214 
215 	mutex_lock(&card->conf_mutex);
216 	mutex_lock(&card->sbp_lock);
217 
218 	if (!qeth_bridgeport_allowed(card))
219 		rc = -EBUSY;
220 	else if (card->options.sbp.role != QETH_SBP_ROLE_NONE)
221 		rc = -EPERM;
222 	else {
223 		card->options.sbp.reflect_promisc = enable;
224 		card->options.sbp.reflect_promisc_primary = primary;
225 		rc = 0;
226 	}
227 
228 	mutex_unlock(&card->sbp_lock);
229 	mutex_unlock(&card->conf_mutex);
230 
231 	return rc ? rc : count;
232 }
233 
234 static DEVICE_ATTR(bridge_reflect_promisc, 0644,
235 			qeth_bridgeport_reflect_show,
236 			qeth_bridgeport_reflect_store);
237 
238 static struct attribute *qeth_l2_bridgeport_attrs[] = {
239 	&dev_attr_bridge_role.attr,
240 	&dev_attr_bridge_state.attr,
241 	&dev_attr_bridge_hostnotify.attr,
242 	&dev_attr_bridge_reflect_promisc.attr,
243 	NULL,
244 };
245 
246 static struct attribute_group qeth_l2_bridgeport_attr_group = {
247 	.attrs = qeth_l2_bridgeport_attrs,
248 };
249 
250 /* VNIC CHARS support */
251 
252 /* convert sysfs attr name to VNIC characteristic */
qeth_l2_vnicc_sysfs_attr_to_char(const char * attr_name)253 static u32 qeth_l2_vnicc_sysfs_attr_to_char(const char *attr_name)
254 {
255 	if (sysfs_streq(attr_name, "flooding"))
256 		return QETH_VNICC_FLOODING;
257 	else if (sysfs_streq(attr_name, "mcast_flooding"))
258 		return QETH_VNICC_MCAST_FLOODING;
259 	else if (sysfs_streq(attr_name, "learning"))
260 		return QETH_VNICC_LEARNING;
261 	else if (sysfs_streq(attr_name, "takeover_setvmac"))
262 		return QETH_VNICC_TAKEOVER_SETVMAC;
263 	else if (sysfs_streq(attr_name, "takeover_learning"))
264 		return QETH_VNICC_TAKEOVER_LEARNING;
265 	else if (sysfs_streq(attr_name, "bridge_invisible"))
266 		return QETH_VNICC_BRIDGE_INVISIBLE;
267 	else if (sysfs_streq(attr_name, "rx_bcast"))
268 		return QETH_VNICC_RX_BCAST;
269 
270 	return 0;
271 }
272 
273 /* get current timeout setting */
qeth_vnicc_timeout_show(struct device * dev,struct device_attribute * attr,char * buf)274 static ssize_t qeth_vnicc_timeout_show(struct device *dev,
275 				       struct device_attribute *attr, char *buf)
276 {
277 	struct qeth_card *card = dev_get_drvdata(dev);
278 	u32 timeout;
279 	int rc;
280 
281 	rc = qeth_l2_vnicc_get_timeout(card, &timeout);
282 	if (rc == -EBUSY)
283 		return sysfs_emit(buf, "n/a (BridgePort)\n");
284 	if (rc == -EOPNOTSUPP)
285 		return sysfs_emit(buf, "n/a\n");
286 	return rc ? rc : sysfs_emit(buf, "%d\n", timeout);
287 }
288 
289 /* change timeout setting */
qeth_vnicc_timeout_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)290 static ssize_t qeth_vnicc_timeout_store(struct device *dev,
291 					struct device_attribute *attr,
292 					const char *buf, size_t count)
293 {
294 	struct qeth_card *card = dev_get_drvdata(dev);
295 	u32 timeout;
296 	int rc;
297 
298 	rc = kstrtou32(buf, 10, &timeout);
299 	if (rc)
300 		return rc;
301 
302 	mutex_lock(&card->conf_mutex);
303 	rc = qeth_l2_vnicc_set_timeout(card, timeout);
304 	mutex_unlock(&card->conf_mutex);
305 	return rc ? rc : count;
306 }
307 
308 /* get current setting of characteristic */
qeth_vnicc_char_show(struct device * dev,struct device_attribute * attr,char * buf)309 static ssize_t qeth_vnicc_char_show(struct device *dev,
310 				    struct device_attribute *attr, char *buf)
311 {
312 	struct qeth_card *card = dev_get_drvdata(dev);
313 	bool state;
314 	u32 vnicc;
315 	int rc;
316 
317 	vnicc = qeth_l2_vnicc_sysfs_attr_to_char(attr->attr.name);
318 	rc = qeth_l2_vnicc_get_state(card, vnicc, &state);
319 
320 	if (rc == -EBUSY)
321 		return sysfs_emit(buf, "n/a (BridgePort)\n");
322 	if (rc == -EOPNOTSUPP)
323 		return sysfs_emit(buf, "n/a\n");
324 	return rc ? rc : sysfs_emit(buf, "%d\n", state);
325 }
326 
327 /* change setting of characteristic */
qeth_vnicc_char_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)328 static ssize_t qeth_vnicc_char_store(struct device *dev,
329 				     struct device_attribute *attr,
330 				     const char *buf, size_t count)
331 {
332 	struct qeth_card *card = dev_get_drvdata(dev);
333 	bool state;
334 	u32 vnicc;
335 	int rc;
336 
337 	if (kstrtobool(buf, &state))
338 		return -EINVAL;
339 
340 	vnicc = qeth_l2_vnicc_sysfs_attr_to_char(attr->attr.name);
341 	mutex_lock(&card->conf_mutex);
342 	rc = qeth_l2_vnicc_set_state(card, vnicc, state);
343 	mutex_unlock(&card->conf_mutex);
344 
345 	return rc ? rc : count;
346 }
347 
348 static DEVICE_ATTR(flooding, 0644, qeth_vnicc_char_show, qeth_vnicc_char_store);
349 static DEVICE_ATTR(mcast_flooding, 0644, qeth_vnicc_char_show,
350 		   qeth_vnicc_char_store);
351 static DEVICE_ATTR(learning, 0644, qeth_vnicc_char_show, qeth_vnicc_char_store);
352 static DEVICE_ATTR(learning_timeout, 0644, qeth_vnicc_timeout_show,
353 		   qeth_vnicc_timeout_store);
354 static DEVICE_ATTR(takeover_setvmac, 0644, qeth_vnicc_char_show,
355 		   qeth_vnicc_char_store);
356 static DEVICE_ATTR(takeover_learning, 0644, qeth_vnicc_char_show,
357 		   qeth_vnicc_char_store);
358 static DEVICE_ATTR(bridge_invisible, 0644, qeth_vnicc_char_show,
359 		   qeth_vnicc_char_store);
360 static DEVICE_ATTR(rx_bcast, 0644, qeth_vnicc_char_show, qeth_vnicc_char_store);
361 
362 static struct attribute *qeth_l2_vnicc_attrs[] = {
363 	&dev_attr_flooding.attr,
364 	&dev_attr_mcast_flooding.attr,
365 	&dev_attr_learning.attr,
366 	&dev_attr_learning_timeout.attr,
367 	&dev_attr_takeover_setvmac.attr,
368 	&dev_attr_takeover_learning.attr,
369 	&dev_attr_bridge_invisible.attr,
370 	&dev_attr_rx_bcast.attr,
371 	NULL,
372 };
373 
374 static struct attribute_group qeth_l2_vnicc_attr_group = {
375 	.attrs = qeth_l2_vnicc_attrs,
376 	.name = "vnicc",
377 };
378 
379 const struct attribute_group *qeth_l2_attr_groups[] = {
380 	&qeth_l2_bridgeport_attr_group,
381 	&qeth_l2_vnicc_attr_group,
382 	NULL,
383 };
384