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