1 /*******************************************************************************
2 *
3 * Copyright (c) 2015-2016 Intel Corporation. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenFabrics.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 *******************************************************************************/
34
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/ethtool.h>
40 #include <linux/mii.h>
41 #include <linux/if_vlan.h>
42 #include <linux/crc32.h>
43 #include <linux/in.h>
44 #include <linux/ip.h>
45 #include <linux/tcp.h>
46 #include <linux/init.h>
47 #include <linux/io.h>
48 #include <asm/irq.h>
49 #include <asm/byteorder.h>
50 #include <net/netevent.h>
51 #include <net/neighbour.h>
52 #include "i40iw.h"
53
54 /**
55 * i40iw_arp_table - manage arp table
56 * @iwdev: iwarp device
57 * @ip_addr: ip address for device
58 * @mac_addr: mac address ptr
59 * @action: modify, delete or add
60 */
i40iw_arp_table(struct i40iw_device * iwdev,u32 * ip_addr,bool ipv4,u8 * mac_addr,u32 action)61 int i40iw_arp_table(struct i40iw_device *iwdev,
62 u32 *ip_addr,
63 bool ipv4,
64 u8 *mac_addr,
65 u32 action)
66 {
67 int arp_index;
68 int err;
69 u32 ip[4];
70
71 if (ipv4) {
72 memset(ip, 0, sizeof(ip));
73 ip[0] = *ip_addr;
74 } else {
75 memcpy(ip, ip_addr, sizeof(ip));
76 }
77
78 for (arp_index = 0; (u32)arp_index < iwdev->arp_table_size; arp_index++)
79 if (memcmp(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip)) == 0)
80 break;
81 switch (action) {
82 case I40IW_ARP_ADD:
83 if (arp_index != iwdev->arp_table_size)
84 return -1;
85
86 arp_index = 0;
87 err = i40iw_alloc_resource(iwdev, iwdev->allocated_arps,
88 iwdev->arp_table_size,
89 (u32 *)&arp_index,
90 &iwdev->next_arp_index);
91
92 if (err)
93 return err;
94
95 memcpy(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip));
96 ether_addr_copy(iwdev->arp_table[arp_index].mac_addr, mac_addr);
97 break;
98 case I40IW_ARP_RESOLVE:
99 if (arp_index == iwdev->arp_table_size)
100 return -1;
101 break;
102 case I40IW_ARP_DELETE:
103 if (arp_index == iwdev->arp_table_size)
104 return -1;
105 memset(iwdev->arp_table[arp_index].ip_addr, 0,
106 sizeof(iwdev->arp_table[arp_index].ip_addr));
107 eth_zero_addr(iwdev->arp_table[arp_index].mac_addr);
108 i40iw_free_resource(iwdev, iwdev->allocated_arps, arp_index);
109 break;
110 default:
111 return -1;
112 }
113 return arp_index;
114 }
115
116 /**
117 * i40iw_wr32 - write 32 bits to hw register
118 * @hw: hardware information including registers
119 * @reg: register offset
120 * @value: vvalue to write to register
121 */
i40iw_wr32(struct i40iw_hw * hw,u32 reg,u32 value)122 inline void i40iw_wr32(struct i40iw_hw *hw, u32 reg, u32 value)
123 {
124 writel(value, hw->hw_addr + reg);
125 }
126
127 /**
128 * i40iw_rd32 - read a 32 bit hw register
129 * @hw: hardware information including registers
130 * @reg: register offset
131 *
132 * Return value of register content
133 */
i40iw_rd32(struct i40iw_hw * hw,u32 reg)134 inline u32 i40iw_rd32(struct i40iw_hw *hw, u32 reg)
135 {
136 return readl(hw->hw_addr + reg);
137 }
138
139 /**
140 * i40iw_inetaddr_event - system notifier for ipv4 addr events
141 * @notfier: not used
142 * @event: event for notifier
143 * @ptr: if address
144 */
i40iw_inetaddr_event(struct notifier_block * notifier,unsigned long event,void * ptr)145 int i40iw_inetaddr_event(struct notifier_block *notifier,
146 unsigned long event,
147 void *ptr)
148 {
149 struct in_ifaddr *ifa = ptr;
150 struct net_device *event_netdev = ifa->ifa_dev->dev;
151 struct net_device *netdev;
152 struct net_device *upper_dev;
153 struct i40iw_device *iwdev;
154 struct i40iw_handler *hdl;
155 u32 local_ipaddr;
156 u32 action = I40IW_ARP_ADD;
157
158 hdl = i40iw_find_netdev(event_netdev);
159 if (!hdl)
160 return NOTIFY_DONE;
161
162 iwdev = &hdl->device;
163 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
164 return NOTIFY_DONE;
165
166 netdev = iwdev->ldev->netdev;
167 upper_dev = netdev_master_upper_dev_get(netdev);
168 if (netdev != event_netdev)
169 return NOTIFY_DONE;
170
171 if (upper_dev) {
172 struct in_device *in;
173
174 rcu_read_lock();
175 in = __in_dev_get_rcu(upper_dev);
176
177 if (!in->ifa_list)
178 local_ipaddr = 0;
179 else
180 local_ipaddr = ntohl(in->ifa_list->ifa_address);
181
182 rcu_read_unlock();
183 } else {
184 local_ipaddr = ntohl(ifa->ifa_address);
185 }
186 switch (event) {
187 case NETDEV_DOWN:
188 action = I40IW_ARP_DELETE;
189 /* Fall through */
190 case NETDEV_UP:
191 /* Fall through */
192 case NETDEV_CHANGEADDR:
193
194 /* Just skip if no need to handle ARP cache */
195 if (!local_ipaddr)
196 break;
197
198 i40iw_manage_arp_cache(iwdev,
199 netdev->dev_addr,
200 &local_ipaddr,
201 true,
202 action);
203 i40iw_if_notify(iwdev, netdev, &local_ipaddr, true,
204 (action == I40IW_ARP_ADD) ? true : false);
205 break;
206 default:
207 break;
208 }
209 return NOTIFY_DONE;
210 }
211
212 /**
213 * i40iw_inet6addr_event - system notifier for ipv6 addr events
214 * @notfier: not used
215 * @event: event for notifier
216 * @ptr: if address
217 */
i40iw_inet6addr_event(struct notifier_block * notifier,unsigned long event,void * ptr)218 int i40iw_inet6addr_event(struct notifier_block *notifier,
219 unsigned long event,
220 void *ptr)
221 {
222 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
223 struct net_device *event_netdev = ifa->idev->dev;
224 struct net_device *netdev;
225 struct i40iw_device *iwdev;
226 struct i40iw_handler *hdl;
227 u32 local_ipaddr6[4];
228 u32 action = I40IW_ARP_ADD;
229
230 hdl = i40iw_find_netdev(event_netdev);
231 if (!hdl)
232 return NOTIFY_DONE;
233
234 iwdev = &hdl->device;
235 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
236 return NOTIFY_DONE;
237
238 netdev = iwdev->ldev->netdev;
239 if (netdev != event_netdev)
240 return NOTIFY_DONE;
241
242 i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
243 switch (event) {
244 case NETDEV_DOWN:
245 action = I40IW_ARP_DELETE;
246 /* Fall through */
247 case NETDEV_UP:
248 /* Fall through */
249 case NETDEV_CHANGEADDR:
250 i40iw_manage_arp_cache(iwdev,
251 netdev->dev_addr,
252 local_ipaddr6,
253 false,
254 action);
255 i40iw_if_notify(iwdev, netdev, local_ipaddr6, false,
256 (action == I40IW_ARP_ADD) ? true : false);
257 break;
258 default:
259 break;
260 }
261 return NOTIFY_DONE;
262 }
263
264 /**
265 * i40iw_net_event - system notifier for netevents
266 * @notfier: not used
267 * @event: event for notifier
268 * @ptr: neighbor
269 */
i40iw_net_event(struct notifier_block * notifier,unsigned long event,void * ptr)270 int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
271 {
272 struct neighbour *neigh = ptr;
273 struct i40iw_device *iwdev;
274 struct i40iw_handler *iwhdl;
275 __be32 *p;
276 u32 local_ipaddr[4];
277
278 switch (event) {
279 case NETEVENT_NEIGH_UPDATE:
280 iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
281 if (!iwhdl)
282 return NOTIFY_DONE;
283 iwdev = &iwhdl->device;
284 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
285 return NOTIFY_DONE;
286 p = (__be32 *)neigh->primary_key;
287 i40iw_copy_ip_ntohl(local_ipaddr, p);
288 if (neigh->nud_state & NUD_VALID) {
289 i40iw_manage_arp_cache(iwdev,
290 neigh->ha,
291 local_ipaddr,
292 false,
293 I40IW_ARP_ADD);
294
295 } else {
296 i40iw_manage_arp_cache(iwdev,
297 neigh->ha,
298 local_ipaddr,
299 false,
300 I40IW_ARP_DELETE);
301 }
302 break;
303 default:
304 break;
305 }
306 return NOTIFY_DONE;
307 }
308
309 /**
310 * i40iw_netdevice_event - system notifier for netdev events
311 * @notfier: not used
312 * @event: event for notifier
313 * @ptr: netdev
314 */
i40iw_netdevice_event(struct notifier_block * notifier,unsigned long event,void * ptr)315 int i40iw_netdevice_event(struct notifier_block *notifier,
316 unsigned long event,
317 void *ptr)
318 {
319 struct net_device *event_netdev;
320 struct net_device *netdev;
321 struct i40iw_device *iwdev;
322 struct i40iw_handler *hdl;
323
324 event_netdev = netdev_notifier_info_to_dev(ptr);
325
326 hdl = i40iw_find_netdev(event_netdev);
327 if (!hdl)
328 return NOTIFY_DONE;
329
330 iwdev = &hdl->device;
331 if (iwdev->init_state < RDMA_DEV_REGISTERED || iwdev->closing)
332 return NOTIFY_DONE;
333
334 netdev = iwdev->ldev->netdev;
335 if (netdev != event_netdev)
336 return NOTIFY_DONE;
337
338 iwdev->iw_status = 1;
339
340 switch (event) {
341 case NETDEV_DOWN:
342 iwdev->iw_status = 0;
343 /* Fall through */
344 case NETDEV_UP:
345 i40iw_port_ibevent(iwdev);
346 break;
347 default:
348 break;
349 }
350 return NOTIFY_DONE;
351 }
352
353 /**
354 * i40iw_get_cqp_request - get cqp struct
355 * @cqp: device cqp ptr
356 * @wait: cqp to be used in wait mode
357 */
i40iw_get_cqp_request(struct i40iw_cqp * cqp,bool wait)358 struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
359 {
360 struct i40iw_cqp_request *cqp_request = NULL;
361 unsigned long flags;
362
363 spin_lock_irqsave(&cqp->req_lock, flags);
364 if (!list_empty(&cqp->cqp_avail_reqs)) {
365 cqp_request = list_entry(cqp->cqp_avail_reqs.next,
366 struct i40iw_cqp_request, list);
367 list_del_init(&cqp_request->list);
368 }
369 spin_unlock_irqrestore(&cqp->req_lock, flags);
370 if (!cqp_request) {
371 cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
372 if (cqp_request) {
373 cqp_request->dynamic = true;
374 INIT_LIST_HEAD(&cqp_request->list);
375 init_waitqueue_head(&cqp_request->waitq);
376 }
377 }
378 if (!cqp_request) {
379 i40iw_pr_err("CQP Request Fail: No Memory");
380 return NULL;
381 }
382
383 if (wait) {
384 atomic_set(&cqp_request->refcount, 2);
385 cqp_request->waiting = true;
386 } else {
387 atomic_set(&cqp_request->refcount, 1);
388 }
389 return cqp_request;
390 }
391
392 /**
393 * i40iw_free_cqp_request - free cqp request
394 * @cqp: cqp ptr
395 * @cqp_request: to be put back in cqp list
396 */
i40iw_free_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)397 void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
398 {
399 struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
400 unsigned long flags;
401
402 if (cqp_request->dynamic) {
403 kfree(cqp_request);
404 } else {
405 cqp_request->request_done = false;
406 cqp_request->callback_fcn = NULL;
407 cqp_request->waiting = false;
408
409 spin_lock_irqsave(&cqp->req_lock, flags);
410 list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
411 spin_unlock_irqrestore(&cqp->req_lock, flags);
412 }
413 wake_up(&iwdev->close_wq);
414 }
415
416 /**
417 * i40iw_put_cqp_request - dec ref count and free if 0
418 * @cqp: cqp ptr
419 * @cqp_request: to be put back in cqp list
420 */
i40iw_put_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)421 void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
422 struct i40iw_cqp_request *cqp_request)
423 {
424 if (atomic_dec_and_test(&cqp_request->refcount))
425 i40iw_free_cqp_request(cqp, cqp_request);
426 }
427
428 /**
429 * i40iw_free_pending_cqp_request -free pending cqp request objs
430 * @cqp: cqp ptr
431 * @cqp_request: to be put back in cqp list
432 */
i40iw_free_pending_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)433 static void i40iw_free_pending_cqp_request(struct i40iw_cqp *cqp,
434 struct i40iw_cqp_request *cqp_request)
435 {
436 struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
437
438 if (cqp_request->waiting) {
439 cqp_request->compl_info.error = true;
440 cqp_request->request_done = true;
441 wake_up(&cqp_request->waitq);
442 }
443 i40iw_put_cqp_request(cqp, cqp_request);
444 wait_event_timeout(iwdev->close_wq,
445 !atomic_read(&cqp_request->refcount),
446 1000);
447 }
448
449 /**
450 * i40iw_cleanup_pending_cqp_op - clean-up cqp with no completions
451 * @iwdev: iwarp device
452 */
i40iw_cleanup_pending_cqp_op(struct i40iw_device * iwdev)453 void i40iw_cleanup_pending_cqp_op(struct i40iw_device *iwdev)
454 {
455 struct i40iw_sc_dev *dev = &iwdev->sc_dev;
456 struct i40iw_cqp *cqp = &iwdev->cqp;
457 struct i40iw_cqp_request *cqp_request = NULL;
458 struct cqp_commands_info *pcmdinfo = NULL;
459 u32 i, pending_work, wqe_idx;
460
461 pending_work = I40IW_RING_WORK_AVAILABLE(cqp->sc_cqp.sq_ring);
462 wqe_idx = I40IW_RING_GETCURRENT_TAIL(cqp->sc_cqp.sq_ring);
463 for (i = 0; i < pending_work; i++) {
464 cqp_request = (struct i40iw_cqp_request *)(unsigned long)cqp->scratch_array[wqe_idx];
465 if (cqp_request)
466 i40iw_free_pending_cqp_request(cqp, cqp_request);
467 wqe_idx = (wqe_idx + 1) % I40IW_RING_GETSIZE(cqp->sc_cqp.sq_ring);
468 }
469
470 while (!list_empty(&dev->cqp_cmd_head)) {
471 pcmdinfo = (struct cqp_commands_info *)i40iw_remove_head(&dev->cqp_cmd_head);
472 cqp_request = container_of(pcmdinfo, struct i40iw_cqp_request, info);
473 if (cqp_request)
474 i40iw_free_pending_cqp_request(cqp, cqp_request);
475 }
476 }
477
478 /**
479 * i40iw_free_qp - callback after destroy cqp completes
480 * @cqp_request: cqp request for destroy qp
481 * @num: not used
482 */
i40iw_free_qp(struct i40iw_cqp_request * cqp_request,u32 num)483 static void i40iw_free_qp(struct i40iw_cqp_request *cqp_request, u32 num)
484 {
485 struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)cqp_request->param;
486 struct i40iw_qp *iwqp = (struct i40iw_qp *)qp->back_qp;
487 struct i40iw_device *iwdev;
488 u32 qp_num = iwqp->ibqp.qp_num;
489
490 iwdev = iwqp->iwdev;
491
492 i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
493 i40iw_free_qp_resources(iwdev, iwqp, qp_num);
494 i40iw_rem_devusecount(iwdev);
495 }
496
497 /**
498 * i40iw_wait_event - wait for completion
499 * @iwdev: iwarp device
500 * @cqp_request: cqp request to wait
501 */
i40iw_wait_event(struct i40iw_device * iwdev,struct i40iw_cqp_request * cqp_request)502 static int i40iw_wait_event(struct i40iw_device *iwdev,
503 struct i40iw_cqp_request *cqp_request)
504 {
505 struct cqp_commands_info *info = &cqp_request->info;
506 struct i40iw_cqp *iwcqp = &iwdev->cqp;
507 struct i40iw_cqp_timeout cqp_timeout;
508 bool cqp_error = false;
509 int err_code = 0;
510 memset(&cqp_timeout, 0, sizeof(cqp_timeout));
511 cqp_timeout.compl_cqp_cmds = iwdev->sc_dev.cqp_cmd_stats[OP_COMPLETED_COMMANDS];
512 do {
513 if (wait_event_timeout(cqp_request->waitq,
514 cqp_request->request_done, CQP_COMPL_WAIT_TIME))
515 break;
516
517 i40iw_check_cqp_progress(&cqp_timeout, &iwdev->sc_dev);
518
519 if (cqp_timeout.count < CQP_TIMEOUT_THRESHOLD)
520 continue;
521
522 i40iw_pr_err("error cqp command 0x%x timed out", info->cqp_cmd);
523 err_code = -ETIME;
524 if (!iwdev->reset) {
525 iwdev->reset = true;
526 i40iw_request_reset(iwdev);
527 }
528 goto done;
529 } while (1);
530 cqp_error = cqp_request->compl_info.error;
531 if (cqp_error) {
532 i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
533 info->cqp_cmd, cqp_request->compl_info.maj_err_code,
534 cqp_request->compl_info.min_err_code);
535 err_code = -EPROTO;
536 goto done;
537 }
538 done:
539 i40iw_put_cqp_request(iwcqp, cqp_request);
540 return err_code;
541 }
542
543 /**
544 * i40iw_handle_cqp_op - process cqp command
545 * @iwdev: iwarp device
546 * @cqp_request: cqp request to process
547 */
i40iw_handle_cqp_op(struct i40iw_device * iwdev,struct i40iw_cqp_request * cqp_request)548 enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
549 struct i40iw_cqp_request
550 *cqp_request)
551 {
552 struct i40iw_sc_dev *dev = &iwdev->sc_dev;
553 enum i40iw_status_code status;
554 struct cqp_commands_info *info = &cqp_request->info;
555 int err_code = 0;
556
557 if (iwdev->reset) {
558 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
559 return I40IW_ERR_CQP_COMPL_ERROR;
560 }
561
562 status = i40iw_process_cqp_cmd(dev, info);
563 if (status) {
564 i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
565 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
566 return status;
567 }
568 if (cqp_request->waiting)
569 err_code = i40iw_wait_event(iwdev, cqp_request);
570 if (err_code)
571 status = I40IW_ERR_CQP_COMPL_ERROR;
572 return status;
573 }
574
575 /**
576 * i40iw_add_devusecount - add dev refcount
577 * @iwdev: dev for refcount
578 */
i40iw_add_devusecount(struct i40iw_device * iwdev)579 void i40iw_add_devusecount(struct i40iw_device *iwdev)
580 {
581 atomic64_inc(&iwdev->use_count);
582 }
583
584 /**
585 * i40iw_rem_devusecount - decrement refcount for dev
586 * @iwdev: device
587 */
i40iw_rem_devusecount(struct i40iw_device * iwdev)588 void i40iw_rem_devusecount(struct i40iw_device *iwdev)
589 {
590 if (!atomic64_dec_and_test(&iwdev->use_count))
591 return;
592 wake_up(&iwdev->close_wq);
593 }
594
595 /**
596 * i40iw_add_pdusecount - add pd refcount
597 * @iwpd: pd for refcount
598 */
i40iw_add_pdusecount(struct i40iw_pd * iwpd)599 void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
600 {
601 atomic_inc(&iwpd->usecount);
602 }
603
604 /**
605 * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
606 * @iwpd: pd for refcount
607 * @iwdev: iwarp device
608 */
i40iw_rem_pdusecount(struct i40iw_pd * iwpd,struct i40iw_device * iwdev)609 void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
610 {
611 if (!atomic_dec_and_test(&iwpd->usecount))
612 return;
613 i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
614 kfree(iwpd);
615 }
616
617 /**
618 * i40iw_add_ref - add refcount for qp
619 * @ibqp: iqarp qp
620 */
i40iw_add_ref(struct ib_qp * ibqp)621 void i40iw_add_ref(struct ib_qp *ibqp)
622 {
623 struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
624
625 atomic_inc(&iwqp->refcount);
626 }
627
628 /**
629 * i40iw_rem_ref - rem refcount for qp and free if 0
630 * @ibqp: iqarp qp
631 */
i40iw_rem_ref(struct ib_qp * ibqp)632 void i40iw_rem_ref(struct ib_qp *ibqp)
633 {
634 struct i40iw_qp *iwqp;
635 enum i40iw_status_code status;
636 struct i40iw_cqp_request *cqp_request;
637 struct cqp_commands_info *cqp_info;
638 struct i40iw_device *iwdev;
639 u32 qp_num;
640 unsigned long flags;
641
642 iwqp = to_iwqp(ibqp);
643 iwdev = iwqp->iwdev;
644 spin_lock_irqsave(&iwdev->qptable_lock, flags);
645 if (!atomic_dec_and_test(&iwqp->refcount)) {
646 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
647 return;
648 }
649
650 qp_num = iwqp->ibqp.qp_num;
651 iwdev->qp_table[qp_num] = NULL;
652 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
653 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
654 if (!cqp_request)
655 return;
656
657 cqp_request->callback_fcn = i40iw_free_qp;
658 cqp_request->param = (void *)&iwqp->sc_qp;
659 cqp_info = &cqp_request->info;
660 cqp_info->cqp_cmd = OP_QP_DESTROY;
661 cqp_info->post_sq = 1;
662 cqp_info->in.u.qp_destroy.qp = &iwqp->sc_qp;
663 cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
664 cqp_info->in.u.qp_destroy.remove_hash_idx = true;
665 status = i40iw_handle_cqp_op(iwdev, cqp_request);
666 if (!status)
667 return;
668
669 i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
670 i40iw_free_qp_resources(iwdev, iwqp, qp_num);
671 i40iw_rem_devusecount(iwdev);
672 }
673
674 /**
675 * i40iw_get_qp - get qp address
676 * @device: iwarp device
677 * @qpn: qp number
678 */
i40iw_get_qp(struct ib_device * device,int qpn)679 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
680 {
681 struct i40iw_device *iwdev = to_iwdev(device);
682
683 if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
684 return NULL;
685
686 return &iwdev->qp_table[qpn]->ibqp;
687 }
688
689 /**
690 * i40iw_debug_buf - print debug msg and buffer is mask set
691 * @dev: hardware control device structure
692 * @mask: mask to compare if to print debug buffer
693 * @buf: points buffer addr
694 * @size: saize of buffer to print
695 */
i40iw_debug_buf(struct i40iw_sc_dev * dev,enum i40iw_debug_flag mask,char * desc,u64 * buf,u32 size)696 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
697 enum i40iw_debug_flag mask,
698 char *desc,
699 u64 *buf,
700 u32 size)
701 {
702 u32 i;
703
704 if (!(dev->debug_mask & mask))
705 return;
706 i40iw_debug(dev, mask, "%s\n", desc);
707 i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
708 (unsigned long long)virt_to_phys(buf));
709
710 for (i = 0; i < size; i += 8)
711 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
712 }
713
714 /**
715 * i40iw_get_hw_addr - return hw addr
716 * @par: points to shared dev
717 */
i40iw_get_hw_addr(void * par)718 u8 __iomem *i40iw_get_hw_addr(void *par)
719 {
720 struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
721
722 return dev->hw->hw_addr;
723 }
724
725 /**
726 * i40iw_remove_head - return head entry and remove from list
727 * @list: list for entry
728 */
i40iw_remove_head(struct list_head * list)729 void *i40iw_remove_head(struct list_head *list)
730 {
731 struct list_head *entry;
732
733 if (list_empty(list))
734 return NULL;
735
736 entry = (void *)list->next;
737 list_del(entry);
738 return (void *)entry;
739 }
740
741 /**
742 * i40iw_allocate_dma_mem - Memory alloc helper fn
743 * @hw: pointer to the HW structure
744 * @mem: ptr to mem struct to fill out
745 * @size: size of memory requested
746 * @alignment: what to align the allocation to
747 */
i40iw_allocate_dma_mem(struct i40iw_hw * hw,struct i40iw_dma_mem * mem,u64 size,u32 alignment)748 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
749 struct i40iw_dma_mem *mem,
750 u64 size,
751 u32 alignment)
752 {
753 struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
754
755 if (!mem)
756 return I40IW_ERR_PARAM;
757 mem->size = ALIGN(size, alignment);
758 mem->va = dma_zalloc_coherent(&pcidev->dev, mem->size,
759 (dma_addr_t *)&mem->pa, GFP_KERNEL);
760 if (!mem->va)
761 return I40IW_ERR_NO_MEMORY;
762 return 0;
763 }
764
765 /**
766 * i40iw_free_dma_mem - Memory free helper fn
767 * @hw: pointer to the HW structure
768 * @mem: ptr to mem struct to free
769 */
i40iw_free_dma_mem(struct i40iw_hw * hw,struct i40iw_dma_mem * mem)770 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
771 {
772 struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
773
774 if (!mem || !mem->va)
775 return;
776
777 dma_free_coherent(&pcidev->dev, mem->size,
778 mem->va, (dma_addr_t)mem->pa);
779 mem->va = NULL;
780 }
781
782 /**
783 * i40iw_allocate_virt_mem - virtual memory alloc helper fn
784 * @hw: pointer to the HW structure
785 * @mem: ptr to mem struct to fill out
786 * @size: size of memory requested
787 */
i40iw_allocate_virt_mem(struct i40iw_hw * hw,struct i40iw_virt_mem * mem,u32 size)788 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
789 struct i40iw_virt_mem *mem,
790 u32 size)
791 {
792 if (!mem)
793 return I40IW_ERR_PARAM;
794
795 mem->size = size;
796 mem->va = kzalloc(size, GFP_KERNEL);
797
798 if (mem->va)
799 return 0;
800 else
801 return I40IW_ERR_NO_MEMORY;
802 }
803
804 /**
805 * i40iw_free_virt_mem - virtual memory free helper fn
806 * @hw: pointer to the HW structure
807 * @mem: ptr to mem struct to free
808 */
i40iw_free_virt_mem(struct i40iw_hw * hw,struct i40iw_virt_mem * mem)809 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
810 struct i40iw_virt_mem *mem)
811 {
812 if (!mem)
813 return I40IW_ERR_PARAM;
814 /*
815 * mem->va points to the parent of mem, so both mem and mem->va
816 * can not be touched once mem->va is freed
817 */
818 kfree(mem->va);
819 return 0;
820 }
821
822 /**
823 * i40iw_cqp_sds_cmd - create cqp command for sd
824 * @dev: hardware control device structure
825 * @sd_info: information for sd cqp
826 *
827 */
i40iw_cqp_sds_cmd(struct i40iw_sc_dev * dev,struct i40iw_update_sds_info * sdinfo)828 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
829 struct i40iw_update_sds_info *sdinfo)
830 {
831 enum i40iw_status_code status;
832 struct i40iw_cqp_request *cqp_request;
833 struct cqp_commands_info *cqp_info;
834 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
835
836 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
837 if (!cqp_request)
838 return I40IW_ERR_NO_MEMORY;
839 cqp_info = &cqp_request->info;
840 memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
841 sizeof(cqp_info->in.u.update_pe_sds.info));
842 cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
843 cqp_info->post_sq = 1;
844 cqp_info->in.u.update_pe_sds.dev = dev;
845 cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
846 status = i40iw_handle_cqp_op(iwdev, cqp_request);
847 if (status)
848 i40iw_pr_err("CQP-OP Update SD's fail");
849 return status;
850 }
851
852 /**
853 * i40iw_qp_suspend_resume - cqp command for suspend/resume
854 * @dev: hardware control device structure
855 * @qp: hardware control qp
856 * @suspend: flag if suspend or resume
857 */
i40iw_qp_suspend_resume(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp,bool suspend)858 void i40iw_qp_suspend_resume(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp, bool suspend)
859 {
860 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
861 struct i40iw_cqp_request *cqp_request;
862 struct i40iw_sc_cqp *cqp = dev->cqp;
863 struct cqp_commands_info *cqp_info;
864 enum i40iw_status_code status;
865
866 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
867 if (!cqp_request)
868 return;
869
870 cqp_info = &cqp_request->info;
871 cqp_info->cqp_cmd = (suspend) ? OP_SUSPEND : OP_RESUME;
872 cqp_info->in.u.suspend_resume.cqp = cqp;
873 cqp_info->in.u.suspend_resume.qp = qp;
874 cqp_info->in.u.suspend_resume.scratch = (uintptr_t)cqp_request;
875 status = i40iw_handle_cqp_op(iwdev, cqp_request);
876 if (status)
877 i40iw_pr_err("CQP-OP QP Suspend/Resume fail");
878 }
879
880 /**
881 * i40iw_term_modify_qp - modify qp for term message
882 * @qp: hardware control qp
883 * @next_state: qp's next state
884 * @term: terminate code
885 * @term_len: length
886 */
i40iw_term_modify_qp(struct i40iw_sc_qp * qp,u8 next_state,u8 term,u8 term_len)887 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
888 {
889 struct i40iw_qp *iwqp;
890
891 iwqp = (struct i40iw_qp *)qp->back_qp;
892 i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
893 };
894
895 /**
896 * i40iw_terminate_done - after terminate is completed
897 * @qp: hardware control qp
898 * @timeout_occurred: indicates if terminate timer expired
899 */
i40iw_terminate_done(struct i40iw_sc_qp * qp,int timeout_occurred)900 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
901 {
902 struct i40iw_qp *iwqp;
903 u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
904 u8 hte = 0;
905 bool first_time;
906 unsigned long flags;
907
908 iwqp = (struct i40iw_qp *)qp->back_qp;
909 spin_lock_irqsave(&iwqp->lock, flags);
910 if (iwqp->hte_added) {
911 iwqp->hte_added = 0;
912 hte = 1;
913 }
914 first_time = !(qp->term_flags & I40IW_TERM_DONE);
915 qp->term_flags |= I40IW_TERM_DONE;
916 spin_unlock_irqrestore(&iwqp->lock, flags);
917 if (first_time) {
918 if (!timeout_occurred)
919 i40iw_terminate_del_timer(qp);
920 else
921 next_iwarp_state = I40IW_QP_STATE_CLOSING;
922
923 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
924 i40iw_cm_disconn(iwqp);
925 }
926 }
927
928 /**
929 * i40iw_terminate_imeout - timeout happened
930 * @context: points to iwarp qp
931 */
i40iw_terminate_timeout(struct timer_list * t)932 static void i40iw_terminate_timeout(struct timer_list *t)
933 {
934 struct i40iw_qp *iwqp = from_timer(iwqp, t, terminate_timer);
935 struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
936
937 i40iw_terminate_done(qp, 1);
938 i40iw_rem_ref(&iwqp->ibqp);
939 }
940
941 /**
942 * i40iw_terminate_start_timer - start terminate timeout
943 * @qp: hardware control qp
944 */
i40iw_terminate_start_timer(struct i40iw_sc_qp * qp)945 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
946 {
947 struct i40iw_qp *iwqp;
948
949 iwqp = (struct i40iw_qp *)qp->back_qp;
950 i40iw_add_ref(&iwqp->ibqp);
951 timer_setup(&iwqp->terminate_timer, i40iw_terminate_timeout, 0);
952 iwqp->terminate_timer.expires = jiffies + HZ;
953 add_timer(&iwqp->terminate_timer);
954 }
955
956 /**
957 * i40iw_terminate_del_timer - delete terminate timeout
958 * @qp: hardware control qp
959 */
i40iw_terminate_del_timer(struct i40iw_sc_qp * qp)960 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
961 {
962 struct i40iw_qp *iwqp;
963
964 iwqp = (struct i40iw_qp *)qp->back_qp;
965 if (del_timer(&iwqp->terminate_timer))
966 i40iw_rem_ref(&iwqp->ibqp);
967 }
968
969 /**
970 * i40iw_cqp_generic_worker - generic worker for cqp
971 * @work: work pointer
972 */
i40iw_cqp_generic_worker(struct work_struct * work)973 static void i40iw_cqp_generic_worker(struct work_struct *work)
974 {
975 struct i40iw_virtchnl_work_info *work_info =
976 &((struct virtchnl_work *)work)->work_info;
977
978 if (work_info->worker_vf_dev)
979 work_info->callback_fcn(work_info->worker_vf_dev);
980 }
981
982 /**
983 * i40iw_cqp_spawn_worker - spawn worket thread
984 * @iwdev: device struct pointer
985 * @work_info: work request info
986 * @iw_vf_idx: virtual function index
987 */
i40iw_cqp_spawn_worker(struct i40iw_sc_dev * dev,struct i40iw_virtchnl_work_info * work_info,u32 iw_vf_idx)988 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
989 struct i40iw_virtchnl_work_info *work_info,
990 u32 iw_vf_idx)
991 {
992 struct virtchnl_work *work;
993 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
994
995 work = &iwdev->virtchnl_w[iw_vf_idx];
996 memcpy(&work->work_info, work_info, sizeof(*work_info));
997 INIT_WORK(&work->work, i40iw_cqp_generic_worker);
998 queue_work(iwdev->virtchnl_wq, &work->work);
999 }
1000
1001 /**
1002 * i40iw_cqp_manage_hmc_fcn_worker -
1003 * @work: work pointer for hmc info
1004 */
i40iw_cqp_manage_hmc_fcn_worker(struct work_struct * work)1005 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
1006 {
1007 struct i40iw_cqp_request *cqp_request =
1008 ((struct virtchnl_work *)work)->cqp_request;
1009 struct i40iw_ccq_cqe_info ccq_cqe_info;
1010 struct i40iw_hmc_fcn_info *hmcfcninfo =
1011 &cqp_request->info.in.u.manage_hmc_pm.info;
1012 struct i40iw_device *iwdev =
1013 (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
1014
1015 ccq_cqe_info.cqp = NULL;
1016 ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
1017 ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
1018 ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
1019 ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
1020 ccq_cqe_info.scratch = 0;
1021 ccq_cqe_info.error = cqp_request->compl_info.error;
1022 hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
1023 hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
1024 i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
1025 }
1026
1027 /**
1028 * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
1029 * @cqp_request: cqp request info struct for hmc fun
1030 * @unused: unused param of callback
1031 */
i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request * cqp_request,u32 unused)1032 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
1033 u32 unused)
1034 {
1035 struct virtchnl_work *work;
1036 struct i40iw_hmc_fcn_info *hmcfcninfo =
1037 &cqp_request->info.in.u.manage_hmc_pm.info;
1038 struct i40iw_device *iwdev =
1039 (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
1040 back_dev;
1041
1042 if (hmcfcninfo && hmcfcninfo->callback_fcn) {
1043 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
1044 atomic_inc(&cqp_request->refcount);
1045 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
1046 work->cqp_request = cqp_request;
1047 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
1048 queue_work(iwdev->virtchnl_wq, &work->work);
1049 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
1050 } else {
1051 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
1052 }
1053 }
1054
1055 /**
1056 * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
1057 * @dev: hardware control device structure
1058 * @hmcfcninfo: info for hmc
1059 */
i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev * dev,struct i40iw_hmc_fcn_info * hmcfcninfo)1060 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
1061 struct i40iw_hmc_fcn_info *hmcfcninfo)
1062 {
1063 enum i40iw_status_code status;
1064 struct i40iw_cqp_request *cqp_request;
1065 struct cqp_commands_info *cqp_info;
1066 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1067
1068 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
1069 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
1070 if (!cqp_request)
1071 return I40IW_ERR_NO_MEMORY;
1072 cqp_info = &cqp_request->info;
1073 cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
1074 cqp_request->param = hmcfcninfo;
1075 memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
1076 sizeof(*hmcfcninfo));
1077 cqp_info->in.u.manage_hmc_pm.dev = dev;
1078 cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
1079 cqp_info->post_sq = 1;
1080 cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
1081 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1082 if (status)
1083 i40iw_pr_err("CQP-OP Manage HMC fail");
1084 return status;
1085 }
1086
1087 /**
1088 * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
1089 * @iwdev: function device struct
1090 * @values_mem: buffer for fpm
1091 * @hmc_fn_id: function id for fpm
1092 */
i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * values_mem,u8 hmc_fn_id)1093 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
1094 struct i40iw_dma_mem *values_mem,
1095 u8 hmc_fn_id)
1096 {
1097 enum i40iw_status_code status;
1098 struct i40iw_cqp_request *cqp_request;
1099 struct cqp_commands_info *cqp_info;
1100 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1101
1102 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1103 if (!cqp_request)
1104 return I40IW_ERR_NO_MEMORY;
1105 cqp_info = &cqp_request->info;
1106 cqp_request->param = NULL;
1107 cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
1108 cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
1109 cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
1110 cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
1111 cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
1112 cqp_info->post_sq = 1;
1113 cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
1114 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1115 if (status)
1116 i40iw_pr_err("CQP-OP Query FPM fail");
1117 return status;
1118 }
1119
1120 /**
1121 * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
1122 * @dev: hardware control device structure
1123 * @values_mem: buffer with fpm values
1124 * @hmc_fn_id: function id for fpm
1125 */
i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * values_mem,u8 hmc_fn_id)1126 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
1127 struct i40iw_dma_mem *values_mem,
1128 u8 hmc_fn_id)
1129 {
1130 enum i40iw_status_code status;
1131 struct i40iw_cqp_request *cqp_request;
1132 struct cqp_commands_info *cqp_info;
1133 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1134
1135 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1136 if (!cqp_request)
1137 return I40IW_ERR_NO_MEMORY;
1138 cqp_info = &cqp_request->info;
1139 cqp_request->param = NULL;
1140 cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
1141 cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
1142 cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
1143 cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
1144 cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
1145 cqp_info->post_sq = 1;
1146 cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
1147 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1148 if (status)
1149 i40iw_pr_err("CQP-OP Commit FPM fail");
1150 return status;
1151 }
1152
1153 /**
1154 * i40iw_vf_wait_vchnl_resp - wait for channel msg
1155 * @iwdev: function's device struct
1156 */
i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev * dev)1157 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
1158 {
1159 struct i40iw_device *iwdev = dev->back_dev;
1160 int timeout_ret;
1161
1162 i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1163 __func__, __LINE__, dev, iwdev);
1164
1165 atomic_set(&iwdev->vchnl_msgs, 2);
1166 timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1167 (atomic_read(&iwdev->vchnl_msgs) == 1),
1168 I40IW_VCHNL_EVENT_TIMEOUT);
1169 atomic_dec(&iwdev->vchnl_msgs);
1170 if (!timeout_ret) {
1171 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1172 atomic_set(&iwdev->vchnl_msgs, 0);
1173 dev->vchnl_up = false;
1174 return I40IW_ERR_TIMEOUT;
1175 }
1176 wake_up(&dev->vf_reqs);
1177 return 0;
1178 }
1179
1180 /**
1181 * i40iw_cqp_cq_create_cmd - create a cq for the cqp
1182 * @dev: device pointer
1183 * @cq: pointer to created cq
1184 */
i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_cq * cq)1185 enum i40iw_status_code i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev *dev,
1186 struct i40iw_sc_cq *cq)
1187 {
1188 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1189 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1190 struct i40iw_cqp_request *cqp_request;
1191 struct cqp_commands_info *cqp_info;
1192 enum i40iw_status_code status;
1193
1194 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1195 if (!cqp_request)
1196 return I40IW_ERR_NO_MEMORY;
1197
1198 cqp_info = &cqp_request->info;
1199 cqp_info->cqp_cmd = OP_CQ_CREATE;
1200 cqp_info->post_sq = 1;
1201 cqp_info->in.u.cq_create.cq = cq;
1202 cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1203 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1204 if (status)
1205 i40iw_pr_err("CQP-OP Create QP fail");
1206
1207 return status;
1208 }
1209
1210 /**
1211 * i40iw_cqp_qp_create_cmd - create a qp for the cqp
1212 * @dev: device pointer
1213 * @qp: pointer to created qp
1214 */
i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1215 enum i40iw_status_code i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev *dev,
1216 struct i40iw_sc_qp *qp)
1217 {
1218 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1219 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1220 struct i40iw_cqp_request *cqp_request;
1221 struct cqp_commands_info *cqp_info;
1222 struct i40iw_create_qp_info *qp_info;
1223 enum i40iw_status_code status;
1224
1225 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1226 if (!cqp_request)
1227 return I40IW_ERR_NO_MEMORY;
1228
1229 cqp_info = &cqp_request->info;
1230 qp_info = &cqp_request->info.in.u.qp_create.info;
1231
1232 memset(qp_info, 0, sizeof(*qp_info));
1233
1234 qp_info->cq_num_valid = true;
1235 qp_info->next_iwarp_state = I40IW_QP_STATE_RTS;
1236
1237 cqp_info->cqp_cmd = OP_QP_CREATE;
1238 cqp_info->post_sq = 1;
1239 cqp_info->in.u.qp_create.qp = qp;
1240 cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
1241 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1242 if (status)
1243 i40iw_pr_err("CQP-OP QP create fail");
1244 return status;
1245 }
1246
1247 /**
1248 * i40iw_cqp_cq_destroy_cmd - destroy the cqp cq
1249 * @dev: device pointer
1250 * @cq: pointer to cq
1251 */
i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_cq * cq)1252 void i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_cq *cq)
1253 {
1254 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1255
1256 i40iw_cq_wq_destroy(iwdev, cq);
1257 }
1258
1259 /**
1260 * i40iw_cqp_qp_destroy_cmd - destroy the cqp
1261 * @dev: device pointer
1262 * @qp: pointer to qp
1263 */
i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1264 void i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1265 {
1266 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1267 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1268 struct i40iw_cqp_request *cqp_request;
1269 struct cqp_commands_info *cqp_info;
1270 enum i40iw_status_code status;
1271
1272 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1273 if (!cqp_request)
1274 return;
1275
1276 cqp_info = &cqp_request->info;
1277 memset(cqp_info, 0, sizeof(*cqp_info));
1278
1279 cqp_info->cqp_cmd = OP_QP_DESTROY;
1280 cqp_info->post_sq = 1;
1281 cqp_info->in.u.qp_destroy.qp = qp;
1282 cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
1283 cqp_info->in.u.qp_destroy.remove_hash_idx = true;
1284 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1285 if (status)
1286 i40iw_pr_err("CQP QP_DESTROY fail");
1287 }
1288
1289
1290 /**
1291 * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1292 * @dev: hardware control device structure
1293 * @qp: hardware control qp
1294 */
i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1295 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1296 {
1297 struct i40iw_gen_ae_info info;
1298 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1299
1300 i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1301 info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1302 info.ae_source = I40IW_AE_SOURCE_RQ;
1303 i40iw_gen_ae(iwdev, qp, &info, false);
1304 }
1305
1306 /**
1307 * i40iw_init_hash_desc - initialize hash for crc calculation
1308 * @desc: cryption type
1309 */
i40iw_init_hash_desc(struct shash_desc ** desc)1310 enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1311 {
1312 struct crypto_shash *tfm;
1313 struct shash_desc *tdesc;
1314
1315 tfm = crypto_alloc_shash("crc32c", 0, 0);
1316 if (IS_ERR(tfm))
1317 return I40IW_ERR_MPA_CRC;
1318
1319 tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1320 GFP_KERNEL);
1321 if (!tdesc) {
1322 crypto_free_shash(tfm);
1323 return I40IW_ERR_MPA_CRC;
1324 }
1325 tdesc->tfm = tfm;
1326 *desc = tdesc;
1327
1328 return 0;
1329 }
1330
1331 /**
1332 * i40iw_free_hash_desc - free hash desc
1333 * @desc: to be freed
1334 */
i40iw_free_hash_desc(struct shash_desc * desc)1335 void i40iw_free_hash_desc(struct shash_desc *desc)
1336 {
1337 if (desc) {
1338 crypto_free_shash(desc->tfm);
1339 kfree(desc);
1340 }
1341 }
1342
1343 /**
1344 * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1345 * @dev: hardware control device structure
1346 * @mem: buffer ptr for fpm to be allocated
1347 * @return: memory allocation status
1348 */
i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * mem)1349 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1350 struct i40iw_dma_mem *mem)
1351 {
1352 enum i40iw_status_code status;
1353 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1354
1355 status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1356 I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1357 return status;
1358 }
1359
1360 /**
1361 * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1362 * @desc: desc for hash
1363 * @addr: address of buffer for crc
1364 * @length: length of buffer
1365 * @value: value to be compared
1366 */
i40iw_ieq_check_mpacrc(struct shash_desc * desc,void * addr,u32 length,u32 value)1367 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1368 void *addr,
1369 u32 length,
1370 u32 value)
1371 {
1372 u32 crc = 0;
1373 int ret;
1374 enum i40iw_status_code ret_code = 0;
1375
1376 crypto_shash_init(desc);
1377 ret = crypto_shash_update(desc, addr, length);
1378 if (!ret)
1379 crypto_shash_final(desc, (u8 *)&crc);
1380 if (crc != value) {
1381 i40iw_pr_err("mpa crc check fail\n");
1382 ret_code = I40IW_ERR_MPA_CRC;
1383 }
1384 return ret_code;
1385 }
1386
1387 /**
1388 * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1389 * @dev: hardware control device structure
1390 * @buf: receive puda buffer on exception q
1391 */
i40iw_ieq_get_qp(struct i40iw_sc_dev * dev,struct i40iw_puda_buf * buf)1392 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1393 struct i40iw_puda_buf *buf)
1394 {
1395 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1396 struct i40iw_qp *iwqp;
1397 struct i40iw_cm_node *cm_node;
1398 u32 loc_addr[4], rem_addr[4];
1399 u16 loc_port, rem_port;
1400 struct ipv6hdr *ip6h;
1401 struct iphdr *iph = (struct iphdr *)buf->iph;
1402 struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1403
1404 if (iph->version == 4) {
1405 memset(loc_addr, 0, sizeof(loc_addr));
1406 loc_addr[0] = ntohl(iph->daddr);
1407 memset(rem_addr, 0, sizeof(rem_addr));
1408 rem_addr[0] = ntohl(iph->saddr);
1409 } else {
1410 ip6h = (struct ipv6hdr *)buf->iph;
1411 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1412 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1413 }
1414 loc_port = ntohs(tcph->dest);
1415 rem_port = ntohs(tcph->source);
1416
1417 cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1418 loc_addr, false, true);
1419 if (!cm_node)
1420 return NULL;
1421 iwqp = cm_node->iwqp;
1422 return &iwqp->sc_qp;
1423 }
1424
1425 /**
1426 * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1427 * @buf: puda to update
1428 * @length: length of buffer
1429 * @seqnum: seq number for tcp
1430 */
i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf * buf,u16 length,u32 seqnum)1431 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1432 {
1433 struct tcphdr *tcph;
1434 struct iphdr *iph;
1435 u16 iphlen;
1436 u16 packetsize;
1437 u8 *addr = (u8 *)buf->mem.va;
1438
1439 iphlen = (buf->ipv4) ? 20 : 40;
1440 iph = (struct iphdr *)(addr + buf->maclen);
1441 tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1442 packetsize = length + buf->tcphlen + iphlen;
1443
1444 iph->tot_len = htons(packetsize);
1445 tcph->seq = htonl(seqnum);
1446 }
1447
1448 /**
1449 * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1450 * @info: to get information
1451 * @buf: puda buffer
1452 */
i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info * info,struct i40iw_puda_buf * buf)1453 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1454 struct i40iw_puda_buf *buf)
1455 {
1456 struct iphdr *iph;
1457 struct ipv6hdr *ip6h;
1458 struct tcphdr *tcph;
1459 u16 iphlen;
1460 u16 pkt_len;
1461 u8 *mem = (u8 *)buf->mem.va;
1462 struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1463
1464 if (ethh->h_proto == htons(0x8100)) {
1465 info->vlan_valid = true;
1466 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1467 }
1468 buf->maclen = (info->vlan_valid) ? 18 : 14;
1469 iphlen = (info->l3proto) ? 40 : 20;
1470 buf->ipv4 = (info->l3proto) ? false : true;
1471 buf->iph = mem + buf->maclen;
1472 iph = (struct iphdr *)buf->iph;
1473
1474 buf->tcph = buf->iph + iphlen;
1475 tcph = (struct tcphdr *)buf->tcph;
1476
1477 if (buf->ipv4) {
1478 pkt_len = ntohs(iph->tot_len);
1479 } else {
1480 ip6h = (struct ipv6hdr *)buf->iph;
1481 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1482 }
1483
1484 buf->totallen = pkt_len + buf->maclen;
1485
1486 if (info->payload_len < buf->totallen) {
1487 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1488 info->payload_len, buf->totallen);
1489 return I40IW_ERR_INVALID_SIZE;
1490 }
1491
1492 buf->tcphlen = (tcph->doff) << 2;
1493 buf->datalen = pkt_len - iphlen - buf->tcphlen;
1494 buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1495 buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1496 buf->seqnum = ntohl(tcph->seq);
1497 return 0;
1498 }
1499
1500 /**
1501 * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1502 * @vsi: pointer to the vsi structure
1503 */
i40iw_hw_stats_timeout(struct timer_list * t)1504 static void i40iw_hw_stats_timeout(struct timer_list *t)
1505 {
1506 struct i40iw_vsi_pestat *pf_devstat = from_timer(pf_devstat, t,
1507 stats_timer);
1508 struct i40iw_sc_vsi *sc_vsi = pf_devstat->vsi;
1509 struct i40iw_sc_dev *pf_dev = sc_vsi->dev;
1510 struct i40iw_vsi_pestat *vf_devstat = NULL;
1511 u16 iw_vf_idx;
1512 unsigned long flags;
1513
1514 /*PF*/
1515 i40iw_hw_stats_read_all(pf_devstat, &pf_devstat->hw_stats);
1516
1517 for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1518 spin_lock_irqsave(&pf_devstat->lock, flags);
1519 if (pf_dev->vf_dev[iw_vf_idx]) {
1520 if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1521 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->pestat;
1522 i40iw_hw_stats_read_all(vf_devstat, &vf_devstat->hw_stats);
1523 }
1524 }
1525 spin_unlock_irqrestore(&pf_devstat->lock, flags);
1526 }
1527
1528 mod_timer(&pf_devstat->stats_timer,
1529 jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1530 }
1531
1532 /**
1533 * i40iw_hw_stats_start_timer - Start periodic stats timer
1534 * @vsi: pointer to the vsi structure
1535 */
i40iw_hw_stats_start_timer(struct i40iw_sc_vsi * vsi)1536 void i40iw_hw_stats_start_timer(struct i40iw_sc_vsi *vsi)
1537 {
1538 struct i40iw_vsi_pestat *devstat = vsi->pestat;
1539
1540 timer_setup(&devstat->stats_timer, i40iw_hw_stats_timeout, 0);
1541 mod_timer(&devstat->stats_timer,
1542 jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1543 }
1544
1545 /**
1546 * i40iw_hw_stats_stop_timer - Delete periodic stats timer
1547 * @vsi: pointer to the vsi structure
1548 */
i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi * vsi)1549 void i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi *vsi)
1550 {
1551 struct i40iw_vsi_pestat *devstat = vsi->pestat;
1552
1553 del_timer_sync(&devstat->stats_timer);
1554 }
1555