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1/*
2 * Copyright 2011 Cisco Systems, Inc. All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 *
17 */
18
19#include <linux/kernel.h>
20#include <linux/string.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/netdevice.h>
24#include <linux/etherdevice.h>
25#include <linux/rtnetlink.h>
26#include <net/ip.h>
27
28#include "vnic_vic.h"
29#include "enic_res.h"
30#include "enic.h"
31#include "enic_dev.h"
32#include "enic_pp.h"
33
34/*
35 * Checks validity of vf index that came in
36 * port profile request
37 */
38int enic_is_valid_pp_vf(struct enic *enic, int vf, int *err)
39{
40 if (vf != PORT_SELF_VF) {
41#ifdef CONFIG_PCI_IOV
42 if (enic_sriov_enabled(enic)) {
43 if (vf < 0 || vf >= enic->num_vfs) {
44 *err = -EINVAL;
45 goto err_out;
46 }
47 } else {
48 *err = -EOPNOTSUPP;
49 goto err_out;
50 }
51#else
52 *err = -EOPNOTSUPP;
53 goto err_out;
54#endif
55 }
56
57 if (vf == PORT_SELF_VF && !enic_is_dynamic(enic)) {
58 *err = -EOPNOTSUPP;
59 goto err_out;
60 }
61
62 *err = 0;
63 return 1;
64
65err_out:
66 return 0;
67}
68
69static int enic_set_port_profile(struct enic *enic, int vf)
70{
71 struct net_device *netdev = enic->netdev;
72 struct enic_port_profile *pp;
73 struct vic_provinfo *vp;
74 const u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
75 const __be16 os_type = htons(VIC_GENERIC_PROV_OS_TYPE_LINUX);
76 char uuid_str[38];
77 char client_mac_str[18];
78 u8 *client_mac;
79 int err;
80
81 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
82 if (err)
83 return err;
84
85 if (!(pp->set & ENIC_SET_NAME) || !strlen(pp->name))
86 return -EINVAL;
87
88 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
89 VIC_PROVINFO_GENERIC_TYPE);
90 if (!vp)
91 return -ENOMEM;
92
93 VIC_PROVINFO_ADD_TLV(vp,
94 VIC_GENERIC_PROV_TLV_PORT_PROFILE_NAME_STR,
95 strlen(pp->name) + 1, pp->name);
96
97 if (!is_zero_ether_addr(pp->mac_addr)) {
98 client_mac = pp->mac_addr;
99 } else if (vf == PORT_SELF_VF) {
100 client_mac = netdev->dev_addr;
101 } else {
102 netdev_err(netdev, "Cannot find pp mac address "
103 "for VF %d\n", vf);
104 err = -EINVAL;
105 goto add_tlv_failure;
106 }
107
108 VIC_PROVINFO_ADD_TLV(vp,
109 VIC_GENERIC_PROV_TLV_CLIENT_MAC_ADDR,
110 ETH_ALEN, client_mac);
111
112 snprintf(client_mac_str, sizeof(client_mac_str), "%pM", client_mac);
113 VIC_PROVINFO_ADD_TLV(vp,
114 VIC_GENERIC_PROV_TLV_CLUSTER_PORT_UUID_STR,
115 sizeof(client_mac_str), client_mac_str);
116
117 if (pp->set & ENIC_SET_INSTANCE) {
118 sprintf(uuid_str, "%pUB", pp->instance_uuid);
119 VIC_PROVINFO_ADD_TLV(vp,
120 VIC_GENERIC_PROV_TLV_CLIENT_UUID_STR,
121 sizeof(uuid_str), uuid_str);
122 }
123
124 if (pp->set & ENIC_SET_HOST) {
125 sprintf(uuid_str, "%pUB", pp->host_uuid);
126 VIC_PROVINFO_ADD_TLV(vp,
127 VIC_GENERIC_PROV_TLV_HOST_UUID_STR,
128 sizeof(uuid_str), uuid_str);
129 }
130
131 VIC_PROVINFO_ADD_TLV(vp,
132 VIC_GENERIC_PROV_TLV_OS_TYPE,
133 sizeof(os_type), &os_type);
134
135 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_init_prov2, (u8 *)vp,
136 vic_provinfo_size(vp));
137 err = enic_dev_status_to_errno(err);
138
139add_tlv_failure:
140 vic_provinfo_free(vp);
141
142 return err;
143}
144
145static int enic_unset_port_profile(struct enic *enic, int vf)
146{
147 int err;
148
149 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_deinit);
150 if (err)
151 return enic_dev_status_to_errno(err);
152
153 if (vf == PORT_SELF_VF)
154 enic_reset_addr_lists(enic);
155
156 return 0;
157}
158
159static int enic_are_pp_different(struct enic_port_profile *pp1,
160 struct enic_port_profile *pp2)
161{
162 return strcmp(pp1->name, pp2->name) | !!memcmp(pp1->instance_uuid,
163 pp2->instance_uuid, PORT_UUID_MAX) |
164 !!memcmp(pp1->host_uuid, pp2->host_uuid, PORT_UUID_MAX) |
165 !ether_addr_equal(pp1->mac_addr, pp2->mac_addr);
166}
167
168static int enic_pp_preassociate(struct enic *enic, int vf,
169 struct enic_port_profile *prev_pp, int *restore_pp);
170static int enic_pp_disassociate(struct enic *enic, int vf,
171 struct enic_port_profile *prev_pp, int *restore_pp);
172static int enic_pp_preassociate_rr(struct enic *enic, int vf,
173 struct enic_port_profile *prev_pp, int *restore_pp);
174static int enic_pp_associate(struct enic *enic, int vf,
175 struct enic_port_profile *prev_pp, int *restore_pp);
176
177static int (*enic_pp_handlers[])(struct enic *enic, int vf,
178 struct enic_port_profile *prev_state,
179 int *restore_pp) = {
180 [PORT_REQUEST_PREASSOCIATE] = enic_pp_preassociate,
181 [PORT_REQUEST_PREASSOCIATE_RR] = enic_pp_preassociate_rr,
182 [PORT_REQUEST_ASSOCIATE] = enic_pp_associate,
183 [PORT_REQUEST_DISASSOCIATE] = enic_pp_disassociate,
184};
185
186static const int enic_pp_handlers_count =
187 ARRAY_SIZE(enic_pp_handlers);
188
189static int enic_pp_preassociate(struct enic *enic, int vf,
190 struct enic_port_profile *prev_pp, int *restore_pp)
191{
192 return -EOPNOTSUPP;
193}
194
195static int enic_pp_disassociate(struct enic *enic, int vf,
196 struct enic_port_profile *prev_pp, int *restore_pp)
197{
198 struct net_device *netdev = enic->netdev;
199 struct enic_port_profile *pp;
200 int err;
201
202 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
203 if (err)
204 return err;
205
206 /* Deregister mac addresses */
207 if (!is_zero_ether_addr(pp->mac_addr))
208 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_del_addr,
209 pp->mac_addr);
210 else if (vf == PORT_SELF_VF && !is_zero_ether_addr(netdev->dev_addr))
211 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_del_addr,
212 netdev->dev_addr);
213
214 return enic_unset_port_profile(enic, vf);
215}
216
217static int enic_pp_preassociate_rr(struct enic *enic, int vf,
218 struct enic_port_profile *prev_pp, int *restore_pp)
219{
220 struct enic_port_profile *pp;
221 int err;
222 int active = 0;
223
224 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
225 if (err)
226 return err;
227
228 if (pp->request != PORT_REQUEST_ASSOCIATE) {
229 /* If pre-associate is not part of an associate.
230 We always disassociate first */
231 err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE](enic, vf,
232 prev_pp, restore_pp);
233 if (err)
234 return err;
235
236 *restore_pp = 0;
237 }
238
239 *restore_pp = 0;
240
241 err = enic_set_port_profile(enic, vf);
242 if (err)
243 return err;
244
245 /* If pre-associate is not part of an associate. */
246 if (pp->request != PORT_REQUEST_ASSOCIATE) {
247 /* Enable device as standby */
248 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_enable2,
249 active);
250 err = enic_dev_status_to_errno(err);
251 }
252
253 return err;
254}
255
256static int enic_pp_associate(struct enic *enic, int vf,
257 struct enic_port_profile *prev_pp, int *restore_pp)
258{
259 struct net_device *netdev = enic->netdev;
260 struct enic_port_profile *pp;
261 int err;
262 int active = 1;
263
264 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
265 if (err)
266 return err;
267
268 /* Check if a pre-associate was called before */
269 if (prev_pp->request != PORT_REQUEST_PREASSOCIATE_RR ||
270 (prev_pp->request == PORT_REQUEST_PREASSOCIATE_RR &&
271 enic_are_pp_different(prev_pp, pp))) {
272 err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE](
273 enic, vf, prev_pp, restore_pp);
274 if (err)
275 return err;
276
277 *restore_pp = 0;
278 }
279
280 err = enic_pp_handlers[PORT_REQUEST_PREASSOCIATE_RR](
281 enic, vf, prev_pp, restore_pp);
282 if (err)
283 return err;
284
285 *restore_pp = 0;
286
287 /* Enable device as active */
288 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_enable2, active);
289 err = enic_dev_status_to_errno(err);
290 if (err)
291 return err;
292
293 /* Register mac address */
294 if (!is_zero_ether_addr(pp->mac_addr))
295 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_add_addr,
296 pp->mac_addr);
297 else if (vf == PORT_SELF_VF && !is_zero_ether_addr(netdev->dev_addr))
298 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_add_addr,
299 netdev->dev_addr);
300
301 return 0;
302}
303
304int enic_process_set_pp_request(struct enic *enic, int vf,
305 struct enic_port_profile *prev_pp, int *restore_pp)
306{
307 struct enic_port_profile *pp;
308 int err;
309
310 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
311 if (err)
312 return err;
313
314 if (pp->request >= enic_pp_handlers_count
315 || !enic_pp_handlers[pp->request])
316 return -EOPNOTSUPP;
317
318 return enic_pp_handlers[pp->request](enic, vf, prev_pp, restore_pp);
319}
320
321int enic_process_get_pp_request(struct enic *enic, int vf,
322 int request, u16 *response)
323{
324 int err, status = ERR_SUCCESS;
325
326 switch (request) {
327
328 case PORT_REQUEST_PREASSOCIATE_RR:
329 case PORT_REQUEST_ASSOCIATE:
330 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
331 vnic_dev_enable2_done, &status);
332 break;
333
334 case PORT_REQUEST_DISASSOCIATE:
335 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
336 vnic_dev_deinit_done, &status);
337 break;
338
339 default:
340 return -EINVAL;
341 }
342
343 if (err)
344 status = err;
345
346 switch (status) {
347 case ERR_SUCCESS:
348 *response = PORT_PROFILE_RESPONSE_SUCCESS;
349 break;
350 case ERR_EINVAL:
351 *response = PORT_PROFILE_RESPONSE_INVALID;
352 break;
353 case ERR_EBADSTATE:
354 *response = PORT_PROFILE_RESPONSE_BADSTATE;
355 break;
356 case ERR_ENOMEM:
357 *response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
358 break;
359 case ERR_EINPROGRESS:
360 *response = PORT_PROFILE_RESPONSE_INPROGRESS;
361 break;
362 default:
363 *response = PORT_PROFILE_RESPONSE_ERROR;
364 break;
365 }
366
367 return 0;
368}