1 /*
2 * Copyright(c) 2017 Intel Corporation.
3 * Copyright(c) 2021 Cornelis Networks.
4 *
5 * This file is provided under a dual BSD/GPLv2 license. When using or
6 * redistributing this file, you may do so under either license.
7 *
8 * GPL LICENSE SUMMARY
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * BSD LICENSE
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 *
25 * - Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * - Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in
29 * the documentation and/or other materials provided with the
30 * distribution.
31 * - Neither the name of Intel Corporation nor the names of its
32 * contributors may be used to endorse or promote products derived
33 * from this software without specific prior written permission.
34 *
35 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 *
47 */
48
49 /*
50 * This file contains OPX Virtual Network Interface Controller (VNIC)
51 * Ethernet Management Agent (EMA) driver
52 */
53
54 #include <linux/module.h>
55 #include <linux/xarray.h>
56 #include <rdma/ib_addr.h>
57 #include <rdma/ib_verbs.h>
58 #include <rdma/opa_smi.h>
59 #include <rdma/opa_port_info.h>
60
61 #include "opa_vnic_internal.h"
62
63 char opa_vnic_driver_name[] = "opa_vnic";
64
65 /*
66 * The trap service level is kept in bits 3 to 7 in the trap_sl_rsvd
67 * field in the class port info MAD.
68 */
69 #define GET_TRAP_SL_FROM_CLASS_PORT_INFO(x) (((x) >> 3) & 0x1f)
70
71 /* Cap trap bursts to a reasonable limit good for normal cases */
72 #define OPA_VNIC_TRAP_BURST_LIMIT 4
73
74 /*
75 * VNIC trap limit timeout.
76 * Inverse of cap2_mask response time out (1.0737 secs) = 0.9
77 * secs approx IB spec 13.4.6.2.1 PortInfoSubnetTimeout and
78 * 13.4.9 Traps.
79 */
80 #define OPA_VNIC_TRAP_TIMEOUT ((4096 * (1UL << 18)) / 1000)
81
82 #define OPA_VNIC_UNSUP_ATTR \
83 cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB)
84
85 #define OPA_VNIC_INVAL_ATTR \
86 cpu_to_be16(IB_MGMT_MAD_STATUS_INVALID_ATTRIB_VALUE)
87
88 #define OPA_VNIC_CLASS_CAP_TRAP 0x1
89
90 /* Maximum number of VNIC ports supported */
91 #define OPA_VNIC_MAX_NUM_VPORT 255
92
93 /**
94 * struct opa_vnic_vema_port -- VNIC VEMA port details
95 * @cport: pointer to port
96 * @mad_agent: pointer to mad agent for port
97 * @class_port_info: Class port info information.
98 * @tid: Transaction id
99 * @port_num: OPA port number
100 * @vports: vnic ports
101 * @event_handler: ib event handler
102 * @lock: adapter interface lock
103 */
104 struct opa_vnic_vema_port {
105 struct opa_vnic_ctrl_port *cport;
106 struct ib_mad_agent *mad_agent;
107 struct opa_class_port_info class_port_info;
108 u64 tid;
109 u8 port_num;
110 struct xarray vports;
111 struct ib_event_handler event_handler;
112
113 /* Lock to query/update network adapter */
114 struct mutex lock;
115 };
116
117 static int opa_vnic_vema_add_one(struct ib_device *device);
118 static void opa_vnic_vema_rem_one(struct ib_device *device,
119 void *client_data);
120
121 static struct ib_client opa_vnic_client = {
122 .name = opa_vnic_driver_name,
123 .add = opa_vnic_vema_add_one,
124 .remove = opa_vnic_vema_rem_one,
125 };
126
127 /**
128 * vema_get_vport_num -- Get the vnic from the mad
129 * @recvd_mad: Received mad
130 *
131 * Return: returns value of the vnic port number
132 */
vema_get_vport_num(struct opa_vnic_vema_mad * recvd_mad)133 static inline u8 vema_get_vport_num(struct opa_vnic_vema_mad *recvd_mad)
134 {
135 return be32_to_cpu(recvd_mad->mad_hdr.attr_mod) & 0xff;
136 }
137
138 /**
139 * vema_get_vport_adapter -- Get vnic port adapter from recvd mad
140 * @recvd_mad: received mad
141 * @port: ptr to port struct on which MAD was recvd
142 *
143 * Return: vnic adapter
144 */
145 static inline struct opa_vnic_adapter *
vema_get_vport_adapter(struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_port * port)146 vema_get_vport_adapter(struct opa_vnic_vema_mad *recvd_mad,
147 struct opa_vnic_vema_port *port)
148 {
149 u8 vport_num = vema_get_vport_num(recvd_mad);
150
151 return xa_load(&port->vports, vport_num);
152 }
153
154 /**
155 * vema_mac_tbl_req_ok -- Check if mac request has correct values
156 * @mac_tbl: mac table
157 *
158 * This function checks for the validity of the offset and number of
159 * entries required.
160 *
161 * Return: true if offset and num_entries are valid
162 */
vema_mac_tbl_req_ok(struct opa_veswport_mactable * mac_tbl)163 static inline bool vema_mac_tbl_req_ok(struct opa_veswport_mactable *mac_tbl)
164 {
165 u16 offset, num_entries;
166 u16 req_entries = ((OPA_VNIC_EMA_DATA - sizeof(*mac_tbl)) /
167 sizeof(mac_tbl->tbl_entries[0]));
168
169 offset = be16_to_cpu(mac_tbl->offset);
170 num_entries = be16_to_cpu(mac_tbl->num_entries);
171
172 return ((num_entries <= req_entries) &&
173 (offset + num_entries <= OPA_VNIC_MAC_TBL_MAX_ENTRIES));
174 }
175
176 /*
177 * Return the power on default values in the port info structure
178 * in big endian format as required by MAD.
179 */
vema_get_pod_values(struct opa_veswport_info * port_info)180 static inline void vema_get_pod_values(struct opa_veswport_info *port_info)
181 {
182 memset(port_info, 0, sizeof(*port_info));
183 port_info->vport.max_mac_tbl_ent =
184 cpu_to_be16(OPA_VNIC_MAC_TBL_MAX_ENTRIES);
185 port_info->vport.max_smac_ent =
186 cpu_to_be16(OPA_VNIC_MAX_SMAC_LIMIT);
187 port_info->vport.oper_state = OPA_VNIC_STATE_DROP_ALL;
188 port_info->vport.config_state = OPA_VNIC_STATE_DROP_ALL;
189 port_info->vesw.eth_mtu = cpu_to_be16(ETH_DATA_LEN);
190 }
191
192 /**
193 * vema_add_vport -- Add a new vnic port
194 * @port: ptr to opa_vnic_vema_port struct
195 * @vport_num: vnic port number (to be added)
196 *
197 * Return a pointer to the vnic adapter structure
198 */
vema_add_vport(struct opa_vnic_vema_port * port,u8 vport_num)199 static struct opa_vnic_adapter *vema_add_vport(struct opa_vnic_vema_port *port,
200 u8 vport_num)
201 {
202 struct opa_vnic_ctrl_port *cport = port->cport;
203 struct opa_vnic_adapter *adapter;
204
205 adapter = opa_vnic_add_netdev(cport->ibdev, port->port_num, vport_num);
206 if (!IS_ERR(adapter)) {
207 int rc;
208
209 adapter->cport = cport;
210 rc = xa_insert(&port->vports, vport_num, adapter, GFP_KERNEL);
211 if (rc < 0) {
212 opa_vnic_rem_netdev(adapter);
213 adapter = ERR_PTR(rc);
214 }
215 }
216
217 return adapter;
218 }
219
220 /**
221 * vema_get_class_port_info -- Get class info for port
222 * @port: Port on whic MAD was received
223 * @recvd_mad: pointer to the received mad
224 * @rsp_mad: pointer to respose mad
225 *
226 * This function copies the latest class port info value set for the
227 * port and stores it for generating traps
228 */
vema_get_class_port_info(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)229 static void vema_get_class_port_info(struct opa_vnic_vema_port *port,
230 struct opa_vnic_vema_mad *recvd_mad,
231 struct opa_vnic_vema_mad *rsp_mad)
232 {
233 struct opa_class_port_info *port_info;
234
235 port_info = (struct opa_class_port_info *)rsp_mad->data;
236 memcpy(port_info, &port->class_port_info, sizeof(*port_info));
237 port_info->base_version = OPA_MGMT_BASE_VERSION;
238 port_info->class_version = OPA_EMA_CLASS_VERSION;
239
240 /*
241 * Set capability mask bit indicating agent generates traps,
242 * and set the maximum number of VNIC ports supported.
243 */
244 port_info->cap_mask = cpu_to_be16((OPA_VNIC_CLASS_CAP_TRAP |
245 (OPA_VNIC_MAX_NUM_VPORT << 8)));
246
247 /*
248 * Since a get routine is always sent by the EM first we
249 * set the expected response time to
250 * 4.096 usec * 2^18 == 1.0737 sec here.
251 */
252 port_info->cap_mask2_resp_time = cpu_to_be32(18);
253 }
254
255 /**
256 * vema_set_class_port_info -- Get class info for port
257 * @port: Port on whic MAD was received
258 * @recvd_mad: pointer to the received mad
259 * @rsp_mad: pointer to respose mad
260 *
261 * This function updates the port class info for the specific vnic
262 * and sets up the response mad data
263 */
vema_set_class_port_info(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)264 static void vema_set_class_port_info(struct opa_vnic_vema_port *port,
265 struct opa_vnic_vema_mad *recvd_mad,
266 struct opa_vnic_vema_mad *rsp_mad)
267 {
268 memcpy(&port->class_port_info, recvd_mad->data,
269 sizeof(port->class_port_info));
270
271 vema_get_class_port_info(port, recvd_mad, rsp_mad);
272 }
273
274 /**
275 * vema_get_veswport_info -- Get veswport info
276 * @port: source port on which MAD was received
277 * @recvd_mad: pointer to the received mad
278 * @rsp_mad: pointer to respose mad
279 */
vema_get_veswport_info(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)280 static void vema_get_veswport_info(struct opa_vnic_vema_port *port,
281 struct opa_vnic_vema_mad *recvd_mad,
282 struct opa_vnic_vema_mad *rsp_mad)
283 {
284 struct opa_veswport_info *port_info =
285 (struct opa_veswport_info *)rsp_mad->data;
286 struct opa_vnic_adapter *adapter;
287
288 adapter = vema_get_vport_adapter(recvd_mad, port);
289 if (adapter) {
290 memset(port_info, 0, sizeof(*port_info));
291 opa_vnic_get_vesw_info(adapter, &port_info->vesw);
292 opa_vnic_get_per_veswport_info(adapter,
293 &port_info->vport);
294 } else {
295 vema_get_pod_values(port_info);
296 }
297 }
298
299 /**
300 * vema_set_veswport_info -- Set veswport info
301 * @port: source port on which MAD was received
302 * @recvd_mad: pointer to the received mad
303 * @rsp_mad: pointer to respose mad
304 *
305 * This function gets the port class infor for vnic
306 */
vema_set_veswport_info(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)307 static void vema_set_veswport_info(struct opa_vnic_vema_port *port,
308 struct opa_vnic_vema_mad *recvd_mad,
309 struct opa_vnic_vema_mad *rsp_mad)
310 {
311 struct opa_vnic_ctrl_port *cport = port->cport;
312 struct opa_veswport_info *port_info;
313 struct opa_vnic_adapter *adapter;
314 u8 vport_num;
315
316 vport_num = vema_get_vport_num(recvd_mad);
317
318 adapter = vema_get_vport_adapter(recvd_mad, port);
319 if (!adapter) {
320 adapter = vema_add_vport(port, vport_num);
321 if (IS_ERR(adapter)) {
322 c_err("failed to add vport %d: %ld\n",
323 vport_num, PTR_ERR(adapter));
324 goto err_exit;
325 }
326 }
327
328 port_info = (struct opa_veswport_info *)recvd_mad->data;
329 opa_vnic_set_vesw_info(adapter, &port_info->vesw);
330 opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
331
332 /* Process the new config settings */
333 opa_vnic_process_vema_config(adapter);
334
335 vema_get_veswport_info(port, recvd_mad, rsp_mad);
336 return;
337
338 err_exit:
339 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
340 }
341
342 /**
343 * vema_get_mac_entries -- Get MAC entries in VNIC MAC table
344 * @port: source port on which MAD was received
345 * @recvd_mad: pointer to the received mad
346 * @rsp_mad: pointer to respose mad
347 *
348 * This function gets the MAC entries that are programmed into
349 * the VNIC MAC forwarding table. It checks for the validity of
350 * the index into the MAC table and the number of entries that
351 * are to be retrieved.
352 */
vema_get_mac_entries(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)353 static void vema_get_mac_entries(struct opa_vnic_vema_port *port,
354 struct opa_vnic_vema_mad *recvd_mad,
355 struct opa_vnic_vema_mad *rsp_mad)
356 {
357 struct opa_veswport_mactable *mac_tbl_in, *mac_tbl_out;
358 struct opa_vnic_adapter *adapter;
359
360 adapter = vema_get_vport_adapter(recvd_mad, port);
361 if (!adapter) {
362 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
363 return;
364 }
365
366 mac_tbl_in = (struct opa_veswport_mactable *)recvd_mad->data;
367 mac_tbl_out = (struct opa_veswport_mactable *)rsp_mad->data;
368
369 if (vema_mac_tbl_req_ok(mac_tbl_in)) {
370 mac_tbl_out->offset = mac_tbl_in->offset;
371 mac_tbl_out->num_entries = mac_tbl_in->num_entries;
372 opa_vnic_query_mac_tbl(adapter, mac_tbl_out);
373 } else {
374 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
375 }
376 }
377
378 /**
379 * vema_set_mac_entries -- Set MAC entries in VNIC MAC table
380 * @port: source port on which MAD was received
381 * @recvd_mad: pointer to the received mad
382 * @rsp_mad: pointer to respose mad
383 *
384 * This function sets the MAC entries in the VNIC forwarding table
385 * It checks for the validity of the index and the number of forwarding
386 * table entries to be programmed.
387 */
vema_set_mac_entries(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)388 static void vema_set_mac_entries(struct opa_vnic_vema_port *port,
389 struct opa_vnic_vema_mad *recvd_mad,
390 struct opa_vnic_vema_mad *rsp_mad)
391 {
392 struct opa_veswport_mactable *mac_tbl;
393 struct opa_vnic_adapter *adapter;
394
395 adapter = vema_get_vport_adapter(recvd_mad, port);
396 if (!adapter) {
397 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
398 return;
399 }
400
401 mac_tbl = (struct opa_veswport_mactable *)recvd_mad->data;
402 if (vema_mac_tbl_req_ok(mac_tbl)) {
403 if (opa_vnic_update_mac_tbl(adapter, mac_tbl))
404 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
405 } else {
406 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
407 }
408 vema_get_mac_entries(port, recvd_mad, rsp_mad);
409 }
410
411 /**
412 * vema_set_delete_vesw -- Reset VESW info to POD values
413 * @port: source port on which MAD was received
414 * @recvd_mad: pointer to the received mad
415 * @rsp_mad: pointer to respose mad
416 *
417 * This function clears all the fields of veswport info for the requested vesw
418 * and sets them back to the power-on default values. It does not delete the
419 * vesw.
420 */
vema_set_delete_vesw(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)421 static void vema_set_delete_vesw(struct opa_vnic_vema_port *port,
422 struct opa_vnic_vema_mad *recvd_mad,
423 struct opa_vnic_vema_mad *rsp_mad)
424 {
425 struct opa_veswport_info *port_info =
426 (struct opa_veswport_info *)rsp_mad->data;
427 struct opa_vnic_adapter *adapter;
428
429 adapter = vema_get_vport_adapter(recvd_mad, port);
430 if (!adapter) {
431 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
432 return;
433 }
434
435 vema_get_pod_values(port_info);
436 opa_vnic_set_vesw_info(adapter, &port_info->vesw);
437 opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
438
439 /* Process the new config settings */
440 opa_vnic_process_vema_config(adapter);
441
442 opa_vnic_release_mac_tbl(adapter);
443
444 vema_get_veswport_info(port, recvd_mad, rsp_mad);
445 }
446
447 /**
448 * vema_get_mac_list -- Get the unicast/multicast macs.
449 * @port: source port on which MAD was received
450 * @recvd_mad: Received mad contains fields to set vnic parameters
451 * @rsp_mad: Response mad to be built
452 * @attr_id: Attribute ID indicating multicast or unicast mac list
453 */
vema_get_mac_list(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad,u16 attr_id)454 static void vema_get_mac_list(struct opa_vnic_vema_port *port,
455 struct opa_vnic_vema_mad *recvd_mad,
456 struct opa_vnic_vema_mad *rsp_mad,
457 u16 attr_id)
458 {
459 struct opa_veswport_iface_macs *macs_in, *macs_out;
460 int max_entries = (OPA_VNIC_EMA_DATA - sizeof(*macs_out)) / ETH_ALEN;
461 struct opa_vnic_adapter *adapter;
462
463 adapter = vema_get_vport_adapter(recvd_mad, port);
464 if (!adapter) {
465 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
466 return;
467 }
468
469 macs_in = (struct opa_veswport_iface_macs *)recvd_mad->data;
470 macs_out = (struct opa_veswport_iface_macs *)rsp_mad->data;
471
472 macs_out->start_idx = macs_in->start_idx;
473 if (macs_in->num_macs_in_msg)
474 macs_out->num_macs_in_msg = macs_in->num_macs_in_msg;
475 else
476 macs_out->num_macs_in_msg = cpu_to_be16(max_entries);
477
478 if (attr_id == OPA_EM_ATTR_IFACE_MCAST_MACS)
479 opa_vnic_query_mcast_macs(adapter, macs_out);
480 else
481 opa_vnic_query_ucast_macs(adapter, macs_out);
482 }
483
484 /**
485 * vema_get_summary_counters -- Gets summary counters.
486 * @port: source port on which MAD was received
487 * @recvd_mad: Received mad contains fields to set vnic parameters
488 * @rsp_mad: Response mad to be built
489 */
vema_get_summary_counters(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)490 static void vema_get_summary_counters(struct opa_vnic_vema_port *port,
491 struct opa_vnic_vema_mad *recvd_mad,
492 struct opa_vnic_vema_mad *rsp_mad)
493 {
494 struct opa_veswport_summary_counters *cntrs;
495 struct opa_vnic_adapter *adapter;
496
497 adapter = vema_get_vport_adapter(recvd_mad, port);
498 if (adapter) {
499 cntrs = (struct opa_veswport_summary_counters *)rsp_mad->data;
500 opa_vnic_get_summary_counters(adapter, cntrs);
501 } else {
502 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
503 }
504 }
505
506 /**
507 * vema_get_error_counters -- Gets summary counters.
508 * @port: source port on which MAD was received
509 * @recvd_mad: Received mad contains fields to set vnic parameters
510 * @rsp_mad: Response mad to be built
511 */
vema_get_error_counters(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)512 static void vema_get_error_counters(struct opa_vnic_vema_port *port,
513 struct opa_vnic_vema_mad *recvd_mad,
514 struct opa_vnic_vema_mad *rsp_mad)
515 {
516 struct opa_veswport_error_counters *cntrs;
517 struct opa_vnic_adapter *adapter;
518
519 adapter = vema_get_vport_adapter(recvd_mad, port);
520 if (adapter) {
521 cntrs = (struct opa_veswport_error_counters *)rsp_mad->data;
522 opa_vnic_get_error_counters(adapter, cntrs);
523 } else {
524 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
525 }
526 }
527
528 /**
529 * vema_get -- Process received get MAD
530 * @port: source port on which MAD was received
531 * @recvd_mad: Received mad
532 * @rsp_mad: Response mad to be built
533 */
vema_get(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)534 static void vema_get(struct opa_vnic_vema_port *port,
535 struct opa_vnic_vema_mad *recvd_mad,
536 struct opa_vnic_vema_mad *rsp_mad)
537 {
538 u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
539
540 switch (attr_id) {
541 case OPA_EM_ATTR_CLASS_PORT_INFO:
542 vema_get_class_port_info(port, recvd_mad, rsp_mad);
543 break;
544 case OPA_EM_ATTR_VESWPORT_INFO:
545 vema_get_veswport_info(port, recvd_mad, rsp_mad);
546 break;
547 case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
548 vema_get_mac_entries(port, recvd_mad, rsp_mad);
549 break;
550 case OPA_EM_ATTR_IFACE_UCAST_MACS:
551 case OPA_EM_ATTR_IFACE_MCAST_MACS:
552 vema_get_mac_list(port, recvd_mad, rsp_mad, attr_id);
553 break;
554 case OPA_EM_ATTR_VESWPORT_SUMMARY_COUNTERS:
555 vema_get_summary_counters(port, recvd_mad, rsp_mad);
556 break;
557 case OPA_EM_ATTR_VESWPORT_ERROR_COUNTERS:
558 vema_get_error_counters(port, recvd_mad, rsp_mad);
559 break;
560 default:
561 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
562 break;
563 }
564 }
565
566 /**
567 * vema_set -- Process received set MAD
568 * @port: source port on which MAD was received
569 * @recvd_mad: Received mad contains fields to set vnic parameters
570 * @rsp_mad: Response mad to be built
571 */
vema_set(struct opa_vnic_vema_port * port,struct opa_vnic_vema_mad * recvd_mad,struct opa_vnic_vema_mad * rsp_mad)572 static void vema_set(struct opa_vnic_vema_port *port,
573 struct opa_vnic_vema_mad *recvd_mad,
574 struct opa_vnic_vema_mad *rsp_mad)
575 {
576 u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
577
578 switch (attr_id) {
579 case OPA_EM_ATTR_CLASS_PORT_INFO:
580 vema_set_class_port_info(port, recvd_mad, rsp_mad);
581 break;
582 case OPA_EM_ATTR_VESWPORT_INFO:
583 vema_set_veswport_info(port, recvd_mad, rsp_mad);
584 break;
585 case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
586 vema_set_mac_entries(port, recvd_mad, rsp_mad);
587 break;
588 case OPA_EM_ATTR_DELETE_VESW:
589 vema_set_delete_vesw(port, recvd_mad, rsp_mad);
590 break;
591 default:
592 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
593 break;
594 }
595 }
596
597 /**
598 * vema_send -- Send handler for VEMA MAD agent
599 * @mad_agent: pointer to the mad agent
600 * @mad_wc: pointer to mad send work completion information
601 *
602 * Free all the data structures associated with the sent MAD
603 */
vema_send(struct ib_mad_agent * mad_agent,struct ib_mad_send_wc * mad_wc)604 static void vema_send(struct ib_mad_agent *mad_agent,
605 struct ib_mad_send_wc *mad_wc)
606 {
607 rdma_destroy_ah(mad_wc->send_buf->ah, RDMA_DESTROY_AH_SLEEPABLE);
608 ib_free_send_mad(mad_wc->send_buf);
609 }
610
611 /**
612 * vema_recv -- Recv handler for VEMA MAD agent
613 * @mad_agent: pointer to the mad agent
614 * @send_buf: Send buffer if found, else NULL
615 * @mad_wc: pointer to mad send work completion information
616 *
617 * Handle only set and get methods and respond to other methods
618 * as unsupported. Allocate response buffer and address handle
619 * for the response MAD.
620 */
vema_recv(struct ib_mad_agent * mad_agent,struct ib_mad_send_buf * send_buf,struct ib_mad_recv_wc * mad_wc)621 static void vema_recv(struct ib_mad_agent *mad_agent,
622 struct ib_mad_send_buf *send_buf,
623 struct ib_mad_recv_wc *mad_wc)
624 {
625 struct opa_vnic_vema_port *port;
626 struct ib_ah *ah;
627 struct ib_mad_send_buf *rsp;
628 struct opa_vnic_vema_mad *vema_mad;
629
630 if (!mad_wc || !mad_wc->recv_buf.mad)
631 return;
632
633 port = mad_agent->context;
634 ah = ib_create_ah_from_wc(mad_agent->qp->pd, mad_wc->wc,
635 mad_wc->recv_buf.grh, mad_agent->port_num);
636 if (IS_ERR(ah))
637 goto free_recv_mad;
638
639 rsp = ib_create_send_mad(mad_agent, mad_wc->wc->src_qp,
640 mad_wc->wc->pkey_index, 0,
641 IB_MGMT_VENDOR_HDR, OPA_VNIC_EMA_DATA,
642 GFP_KERNEL, OPA_MGMT_BASE_VERSION);
643 if (IS_ERR(rsp))
644 goto err_rsp;
645
646 rsp->ah = ah;
647 vema_mad = rsp->mad;
648 memcpy(vema_mad, mad_wc->recv_buf.mad, IB_MGMT_VENDOR_HDR);
649 vema_mad->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
650 vema_mad->mad_hdr.status = 0;
651
652 /* Lock ensures network adapter is not removed */
653 mutex_lock(&port->lock);
654
655 switch (mad_wc->recv_buf.mad->mad_hdr.method) {
656 case IB_MGMT_METHOD_GET:
657 vema_get(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
658 vema_mad);
659 break;
660 case IB_MGMT_METHOD_SET:
661 vema_set(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
662 vema_mad);
663 break;
664 default:
665 vema_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
666 break;
667 }
668 mutex_unlock(&port->lock);
669
670 if (!ib_post_send_mad(rsp, NULL)) {
671 /*
672 * with post send successful ah and send mad
673 * will be destroyed in send handler
674 */
675 goto free_recv_mad;
676 }
677
678 ib_free_send_mad(rsp);
679
680 err_rsp:
681 rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
682 free_recv_mad:
683 ib_free_recv_mad(mad_wc);
684 }
685
686 /**
687 * vema_get_port -- Gets the opa_vnic_vema_port
688 * @cport: pointer to control dev
689 * @port_num: Port number
690 *
691 * This function loops through the ports and returns
692 * the opa_vnic_vema port structure that is associated
693 * with the OPA port number
694 *
695 * Return: ptr to requested opa_vnic_vema_port strucure
696 * if success, NULL if not
697 */
698 static struct opa_vnic_vema_port *
vema_get_port(struct opa_vnic_ctrl_port * cport,u8 port_num)699 vema_get_port(struct opa_vnic_ctrl_port *cport, u8 port_num)
700 {
701 struct opa_vnic_vema_port *port = (void *)cport + sizeof(*cport);
702
703 if (port_num > cport->num_ports)
704 return NULL;
705
706 return port + (port_num - 1);
707 }
708
709 /**
710 * opa_vnic_vema_send_trap -- This function sends a trap to the EM
711 * @adapter: pointer to vnic adapter
712 * @data: pointer to trap data filled by calling function
713 * @lid: issuers lid (encap_slid from vesw_port_info)
714 *
715 * This function is called from the VNIC driver to send a trap if there
716 * is somethng the EM should be notified about. These events currently
717 * are
718 * 1) UNICAST INTERFACE MACADDRESS changes
719 * 2) MULTICAST INTERFACE MACADDRESS changes
720 * 3) ETHERNET LINK STATUS changes
721 * While allocating the send mad the remote site qpn used is 1
722 * as this is the well known QP.
723 *
724 */
opa_vnic_vema_send_trap(struct opa_vnic_adapter * adapter,struct __opa_veswport_trap * data,u32 lid)725 void opa_vnic_vema_send_trap(struct opa_vnic_adapter *adapter,
726 struct __opa_veswport_trap *data, u32 lid)
727 {
728 struct opa_vnic_ctrl_port *cport = adapter->cport;
729 struct ib_mad_send_buf *send_buf;
730 struct opa_vnic_vema_port *port;
731 struct ib_device *ibp;
732 struct opa_vnic_vema_mad_trap *trap_mad;
733 struct opa_class_port_info *class;
734 struct rdma_ah_attr ah_attr;
735 struct ib_ah *ah;
736 struct opa_veswport_trap *trap;
737 u32 trap_lid;
738 u16 pkey_idx;
739
740 if (!cport)
741 goto err_exit;
742 ibp = cport->ibdev;
743 port = vema_get_port(cport, data->opaportnum);
744 if (!port || !port->mad_agent)
745 goto err_exit;
746
747 if (time_before(jiffies, adapter->trap_timeout)) {
748 if (adapter->trap_count == OPA_VNIC_TRAP_BURST_LIMIT) {
749 v_warn("Trap rate exceeded\n");
750 goto err_exit;
751 } else {
752 adapter->trap_count++;
753 }
754 } else {
755 adapter->trap_count = 0;
756 }
757
758 class = &port->class_port_info;
759 /* Set up address handle */
760 memset(&ah_attr, 0, sizeof(ah_attr));
761 ah_attr.type = rdma_ah_find_type(ibp, port->port_num);
762 rdma_ah_set_sl(&ah_attr,
763 GET_TRAP_SL_FROM_CLASS_PORT_INFO(class->trap_sl_rsvd));
764 rdma_ah_set_port_num(&ah_attr, port->port_num);
765 trap_lid = be32_to_cpu(class->trap_lid);
766 /*
767 * check for trap lid validity, must not be zero
768 * The trap sink could change after we fashion the MAD but since traps
769 * are not guaranteed we won't use a lock as anyway the change will take
770 * place even with locking.
771 */
772 if (!trap_lid) {
773 c_err("%s: Invalid dlid\n", __func__);
774 goto err_exit;
775 }
776
777 rdma_ah_set_dlid(&ah_attr, trap_lid);
778 ah = rdma_create_ah(port->mad_agent->qp->pd, &ah_attr, 0);
779 if (IS_ERR(ah)) {
780 c_err("%s:Couldn't create new AH = %p\n", __func__, ah);
781 c_err("%s:dlid = %d, sl = %d, port = %d\n", __func__,
782 rdma_ah_get_dlid(&ah_attr), rdma_ah_get_sl(&ah_attr),
783 rdma_ah_get_port_num(&ah_attr));
784 goto err_exit;
785 }
786
787 if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_FULL,
788 &pkey_idx) < 0) {
789 c_err("%s:full key not found, defaulting to partial\n",
790 __func__);
791 if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_PARTIAL,
792 &pkey_idx) < 0)
793 pkey_idx = 1;
794 }
795
796 send_buf = ib_create_send_mad(port->mad_agent, 1, pkey_idx, 0,
797 IB_MGMT_VENDOR_HDR, IB_MGMT_MAD_DATA,
798 GFP_ATOMIC, OPA_MGMT_BASE_VERSION);
799 if (IS_ERR(send_buf)) {
800 c_err("%s:Couldn't allocate send buf\n", __func__);
801 goto err_sndbuf;
802 }
803
804 send_buf->ah = ah;
805
806 /* Set up common MAD hdr */
807 trap_mad = send_buf->mad;
808 trap_mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
809 trap_mad->mad_hdr.mgmt_class = OPA_MGMT_CLASS_INTEL_EMA;
810 trap_mad->mad_hdr.class_version = OPA_EMA_CLASS_VERSION;
811 trap_mad->mad_hdr.method = IB_MGMT_METHOD_TRAP;
812 port->tid++;
813 trap_mad->mad_hdr.tid = cpu_to_be64(port->tid);
814 trap_mad->mad_hdr.attr_id = IB_SMP_ATTR_NOTICE;
815
816 /* Set up vendor OUI */
817 trap_mad->oui[0] = INTEL_OUI_1;
818 trap_mad->oui[1] = INTEL_OUI_2;
819 trap_mad->oui[2] = INTEL_OUI_3;
820
821 /* Setup notice attribute portion */
822 trap_mad->notice.gen_type = OPA_INTEL_EMA_NOTICE_TYPE_INFO << 1;
823 trap_mad->notice.oui_1 = INTEL_OUI_1;
824 trap_mad->notice.oui_2 = INTEL_OUI_2;
825 trap_mad->notice.oui_3 = INTEL_OUI_3;
826 trap_mad->notice.issuer_lid = cpu_to_be32(lid);
827
828 /* copy the actual trap data */
829 trap = (struct opa_veswport_trap *)trap_mad->notice.raw_data;
830 trap->fabric_id = cpu_to_be16(data->fabric_id);
831 trap->veswid = cpu_to_be16(data->veswid);
832 trap->veswportnum = cpu_to_be32(data->veswportnum);
833 trap->opaportnum = cpu_to_be16(data->opaportnum);
834 trap->veswportindex = data->veswportindex;
835 trap->opcode = data->opcode;
836
837 /* If successful send set up rate limit timeout else bail */
838 if (ib_post_send_mad(send_buf, NULL)) {
839 ib_free_send_mad(send_buf);
840 } else {
841 if (adapter->trap_count)
842 return;
843 adapter->trap_timeout = jiffies +
844 usecs_to_jiffies(OPA_VNIC_TRAP_TIMEOUT);
845 return;
846 }
847
848 err_sndbuf:
849 rdma_destroy_ah(ah, 0);
850 err_exit:
851 v_err("Aborting trap\n");
852 }
853
opa_vnic_event(struct ib_event_handler * handler,struct ib_event * record)854 static void opa_vnic_event(struct ib_event_handler *handler,
855 struct ib_event *record)
856 {
857 struct opa_vnic_vema_port *port =
858 container_of(handler, struct opa_vnic_vema_port, event_handler);
859 struct opa_vnic_ctrl_port *cport = port->cport;
860 struct opa_vnic_adapter *adapter;
861 unsigned long index;
862
863 if (record->element.port_num != port->port_num)
864 return;
865
866 c_dbg("OPA_VNIC received event %d on device %s port %d\n",
867 record->event, dev_name(&record->device->dev),
868 record->element.port_num);
869
870 if (record->event != IB_EVENT_PORT_ERR &&
871 record->event != IB_EVENT_PORT_ACTIVE)
872 return;
873
874 xa_for_each(&port->vports, index, adapter) {
875 if (record->event == IB_EVENT_PORT_ACTIVE)
876 netif_carrier_on(adapter->netdev);
877 else
878 netif_carrier_off(adapter->netdev);
879 }
880 }
881
882 /**
883 * vema_unregister -- Unregisters agent
884 * @cport: pointer to control port
885 *
886 * This deletes the registration by VEMA for MADs
887 */
vema_unregister(struct opa_vnic_ctrl_port * cport)888 static void vema_unregister(struct opa_vnic_ctrl_port *cport)
889 {
890 struct opa_vnic_adapter *adapter;
891 unsigned long index;
892 int i;
893
894 for (i = 1; i <= cport->num_ports; i++) {
895 struct opa_vnic_vema_port *port = vema_get_port(cport, i);
896
897 if (!port->mad_agent)
898 continue;
899
900 /* Lock ensures no MAD is being processed */
901 mutex_lock(&port->lock);
902 xa_for_each(&port->vports, index, adapter)
903 opa_vnic_rem_netdev(adapter);
904 mutex_unlock(&port->lock);
905
906 ib_unregister_mad_agent(port->mad_agent);
907 port->mad_agent = NULL;
908 mutex_destroy(&port->lock);
909 xa_destroy(&port->vports);
910 ib_unregister_event_handler(&port->event_handler);
911 }
912 }
913
914 /**
915 * vema_register -- Registers agent
916 * @cport: pointer to control port
917 *
918 * This function registers the handlers for the VEMA MADs
919 *
920 * Return: returns 0 on success. non zero otherwise
921 */
vema_register(struct opa_vnic_ctrl_port * cport)922 static int vema_register(struct opa_vnic_ctrl_port *cport)
923 {
924 struct ib_mad_reg_req reg_req = {
925 .mgmt_class = OPA_MGMT_CLASS_INTEL_EMA,
926 .mgmt_class_version = OPA_MGMT_BASE_VERSION,
927 .oui = { INTEL_OUI_1, INTEL_OUI_2, INTEL_OUI_3 }
928 };
929 int i;
930
931 set_bit(IB_MGMT_METHOD_GET, reg_req.method_mask);
932 set_bit(IB_MGMT_METHOD_SET, reg_req.method_mask);
933
934 /* register ib event handler and mad agent for each port on dev */
935 for (i = 1; i <= cport->num_ports; i++) {
936 struct opa_vnic_vema_port *port = vema_get_port(cport, i);
937 int ret;
938
939 port->cport = cport;
940 port->port_num = i;
941
942 INIT_IB_EVENT_HANDLER(&port->event_handler,
943 cport->ibdev, opa_vnic_event);
944 ib_register_event_handler(&port->event_handler);
945
946 xa_init(&port->vports);
947 mutex_init(&port->lock);
948 port->mad_agent = ib_register_mad_agent(cport->ibdev, i,
949 IB_QPT_GSI, ®_req,
950 IB_MGMT_RMPP_VERSION,
951 vema_send, vema_recv,
952 port, 0);
953 if (IS_ERR(port->mad_agent)) {
954 ret = PTR_ERR(port->mad_agent);
955 port->mad_agent = NULL;
956 mutex_destroy(&port->lock);
957 vema_unregister(cport);
958 return ret;
959 }
960 }
961
962 return 0;
963 }
964
965 /**
966 * opa_vnic_ctrl_config_dev -- This function sends a trap to the EM
967 * by way of ib_modify_port to indicate support for ethernet on the
968 * fabric.
969 * @cport: pointer to control port
970 * @en: enable or disable ethernet on fabric support
971 */
opa_vnic_ctrl_config_dev(struct opa_vnic_ctrl_port * cport,bool en)972 static void opa_vnic_ctrl_config_dev(struct opa_vnic_ctrl_port *cport, bool en)
973 {
974 struct ib_port_modify pm = { 0 };
975 int i;
976
977 if (en)
978 pm.set_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
979 else
980 pm.clr_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
981
982 for (i = 1; i <= cport->num_ports; i++)
983 ib_modify_port(cport->ibdev, i, IB_PORT_OPA_MASK_CHG, &pm);
984 }
985
986 /**
987 * opa_vnic_vema_add_one -- Handle new ib device
988 * @device: ib device pointer
989 *
990 * Allocate the vnic control port and initialize it.
991 */
opa_vnic_vema_add_one(struct ib_device * device)992 static int opa_vnic_vema_add_one(struct ib_device *device)
993 {
994 struct opa_vnic_ctrl_port *cport;
995 int rc, size = sizeof(*cport);
996
997 if (!rdma_cap_opa_vnic(device))
998 return -EOPNOTSUPP;
999
1000 size += device->phys_port_cnt * sizeof(struct opa_vnic_vema_port);
1001 cport = kzalloc(size, GFP_KERNEL);
1002 if (!cport)
1003 return -ENOMEM;
1004
1005 cport->num_ports = device->phys_port_cnt;
1006 cport->ibdev = device;
1007
1008 /* Initialize opa vnic management agent (vema) */
1009 rc = vema_register(cport);
1010 if (!rc)
1011 c_info("VNIC client initialized\n");
1012
1013 ib_set_client_data(device, &opa_vnic_client, cport);
1014 opa_vnic_ctrl_config_dev(cport, true);
1015 return 0;
1016 }
1017
1018 /**
1019 * opa_vnic_vema_rem_one -- Handle ib device removal
1020 * @device: ib device pointer
1021 * @client_data: ib client data
1022 *
1023 * Uninitialize and free the vnic control port.
1024 */
opa_vnic_vema_rem_one(struct ib_device * device,void * client_data)1025 static void opa_vnic_vema_rem_one(struct ib_device *device,
1026 void *client_data)
1027 {
1028 struct opa_vnic_ctrl_port *cport = client_data;
1029
1030 c_info("removing VNIC client\n");
1031 opa_vnic_ctrl_config_dev(cport, false);
1032 vema_unregister(cport);
1033 kfree(cport);
1034 }
1035
opa_vnic_init(void)1036 static int __init opa_vnic_init(void)
1037 {
1038 int rc;
1039
1040 rc = ib_register_client(&opa_vnic_client);
1041 if (rc)
1042 pr_err("VNIC driver register failed %d\n", rc);
1043
1044 return rc;
1045 }
1046 module_init(opa_vnic_init);
1047
opa_vnic_deinit(void)1048 static void opa_vnic_deinit(void)
1049 {
1050 ib_unregister_client(&opa_vnic_client);
1051 }
1052 module_exit(opa_vnic_deinit);
1053
1054 MODULE_LICENSE("Dual BSD/GPL");
1055 MODULE_AUTHOR("Cornelis Networks");
1056 MODULE_DESCRIPTION("Cornelis OPX Virtual Network driver");
1057
