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 local_ipaddr = 0;
178 if (in) {
179 struct in_ifaddr *ifa;
180
181 ifa = rcu_dereference(in->ifa_list);
182 if (ifa)
183 local_ipaddr = ntohl(ifa->ifa_address);
184 }
185
186 rcu_read_unlock();
187 } else {
188 local_ipaddr = ntohl(ifa->ifa_address);
189 }
190 switch (event) {
191 case NETDEV_DOWN:
192 action = I40IW_ARP_DELETE;
193 /* Fall through */
194 case NETDEV_UP:
195 /* Fall through */
196 case NETDEV_CHANGEADDR:
197
198 /* Just skip if no need to handle ARP cache */
199 if (!local_ipaddr)
200 break;
201
202 i40iw_manage_arp_cache(iwdev,
203 netdev->dev_addr,
204 &local_ipaddr,
205 true,
206 action);
207 i40iw_if_notify(iwdev, netdev, &local_ipaddr, true,
208 (action == I40IW_ARP_ADD) ? true : false);
209 break;
210 default:
211 break;
212 }
213 return NOTIFY_DONE;
214 }
215
216 /**
217 * i40iw_inet6addr_event - system notifier for ipv6 addr events
218 * @notfier: not used
219 * @event: event for notifier
220 * @ptr: if address
221 */
i40iw_inet6addr_event(struct notifier_block * notifier,unsigned long event,void * ptr)222 int i40iw_inet6addr_event(struct notifier_block *notifier,
223 unsigned long event,
224 void *ptr)
225 {
226 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
227 struct net_device *event_netdev = ifa->idev->dev;
228 struct net_device *netdev;
229 struct i40iw_device *iwdev;
230 struct i40iw_handler *hdl;
231 u32 local_ipaddr6[4];
232 u32 action = I40IW_ARP_ADD;
233
234 hdl = i40iw_find_netdev(event_netdev);
235 if (!hdl)
236 return NOTIFY_DONE;
237
238 iwdev = &hdl->device;
239 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
240 return NOTIFY_DONE;
241
242 netdev = iwdev->ldev->netdev;
243 if (netdev != event_netdev)
244 return NOTIFY_DONE;
245
246 i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
247 switch (event) {
248 case NETDEV_DOWN:
249 action = I40IW_ARP_DELETE;
250 /* Fall through */
251 case NETDEV_UP:
252 /* Fall through */
253 case NETDEV_CHANGEADDR:
254 i40iw_manage_arp_cache(iwdev,
255 netdev->dev_addr,
256 local_ipaddr6,
257 false,
258 action);
259 i40iw_if_notify(iwdev, netdev, local_ipaddr6, false,
260 (action == I40IW_ARP_ADD) ? true : false);
261 break;
262 default:
263 break;
264 }
265 return NOTIFY_DONE;
266 }
267
268 /**
269 * i40iw_net_event - system notifier for netevents
270 * @notfier: not used
271 * @event: event for notifier
272 * @ptr: neighbor
273 */
i40iw_net_event(struct notifier_block * notifier,unsigned long event,void * ptr)274 int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
275 {
276 struct neighbour *neigh = ptr;
277 struct i40iw_device *iwdev;
278 struct i40iw_handler *iwhdl;
279 __be32 *p;
280 u32 local_ipaddr[4];
281
282 switch (event) {
283 case NETEVENT_NEIGH_UPDATE:
284 iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
285 if (!iwhdl)
286 return NOTIFY_DONE;
287 iwdev = &iwhdl->device;
288 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
289 return NOTIFY_DONE;
290 p = (__be32 *)neigh->primary_key;
291 i40iw_copy_ip_ntohl(local_ipaddr, p);
292 if (neigh->nud_state & NUD_VALID) {
293 i40iw_manage_arp_cache(iwdev,
294 neigh->ha,
295 local_ipaddr,
296 false,
297 I40IW_ARP_ADD);
298
299 } else {
300 i40iw_manage_arp_cache(iwdev,
301 neigh->ha,
302 local_ipaddr,
303 false,
304 I40IW_ARP_DELETE);
305 }
306 break;
307 default:
308 break;
309 }
310 return NOTIFY_DONE;
311 }
312
313 /**
314 * i40iw_netdevice_event - system notifier for netdev events
315 * @notfier: not used
316 * @event: event for notifier
317 * @ptr: netdev
318 */
i40iw_netdevice_event(struct notifier_block * notifier,unsigned long event,void * ptr)319 int i40iw_netdevice_event(struct notifier_block *notifier,
320 unsigned long event,
321 void *ptr)
322 {
323 struct net_device *event_netdev;
324 struct net_device *netdev;
325 struct i40iw_device *iwdev;
326 struct i40iw_handler *hdl;
327
328 event_netdev = netdev_notifier_info_to_dev(ptr);
329
330 hdl = i40iw_find_netdev(event_netdev);
331 if (!hdl)
332 return NOTIFY_DONE;
333
334 iwdev = &hdl->device;
335 if (iwdev->init_state < RDMA_DEV_REGISTERED || iwdev->closing)
336 return NOTIFY_DONE;
337
338 netdev = iwdev->ldev->netdev;
339 if (netdev != event_netdev)
340 return NOTIFY_DONE;
341
342 iwdev->iw_status = 1;
343
344 switch (event) {
345 case NETDEV_DOWN:
346 iwdev->iw_status = 0;
347 /* Fall through */
348 case NETDEV_UP:
349 i40iw_port_ibevent(iwdev);
350 break;
351 default:
352 break;
353 }
354 return NOTIFY_DONE;
355 }
356
357 /**
358 * i40iw_get_cqp_request - get cqp struct
359 * @cqp: device cqp ptr
360 * @wait: cqp to be used in wait mode
361 */
i40iw_get_cqp_request(struct i40iw_cqp * cqp,bool wait)362 struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
363 {
364 struct i40iw_cqp_request *cqp_request = NULL;
365 unsigned long flags;
366
367 spin_lock_irqsave(&cqp->req_lock, flags);
368 if (!list_empty(&cqp->cqp_avail_reqs)) {
369 cqp_request = list_entry(cqp->cqp_avail_reqs.next,
370 struct i40iw_cqp_request, list);
371 list_del_init(&cqp_request->list);
372 }
373 spin_unlock_irqrestore(&cqp->req_lock, flags);
374 if (!cqp_request) {
375 cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
376 if (cqp_request) {
377 cqp_request->dynamic = true;
378 INIT_LIST_HEAD(&cqp_request->list);
379 init_waitqueue_head(&cqp_request->waitq);
380 }
381 }
382 if (!cqp_request) {
383 i40iw_pr_err("CQP Request Fail: No Memory");
384 return NULL;
385 }
386
387 if (wait) {
388 atomic_set(&cqp_request->refcount, 2);
389 cqp_request->waiting = true;
390 } else {
391 atomic_set(&cqp_request->refcount, 1);
392 }
393 return cqp_request;
394 }
395
396 /**
397 * i40iw_free_cqp_request - free cqp request
398 * @cqp: cqp ptr
399 * @cqp_request: to be put back in cqp list
400 */
i40iw_free_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)401 void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
402 {
403 struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
404 unsigned long flags;
405
406 if (cqp_request->dynamic) {
407 kfree(cqp_request);
408 } else {
409 cqp_request->request_done = false;
410 cqp_request->callback_fcn = NULL;
411 cqp_request->waiting = false;
412
413 spin_lock_irqsave(&cqp->req_lock, flags);
414 list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
415 spin_unlock_irqrestore(&cqp->req_lock, flags);
416 }
417 wake_up(&iwdev->close_wq);
418 }
419
420 /**
421 * i40iw_put_cqp_request - dec ref count and free if 0
422 * @cqp: cqp ptr
423 * @cqp_request: to be put back in cqp list
424 */
i40iw_put_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)425 void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
426 struct i40iw_cqp_request *cqp_request)
427 {
428 if (atomic_dec_and_test(&cqp_request->refcount))
429 i40iw_free_cqp_request(cqp, cqp_request);
430 }
431
432 /**
433 * i40iw_free_pending_cqp_request -free pending cqp request objs
434 * @cqp: cqp ptr
435 * @cqp_request: to be put back in cqp list
436 */
i40iw_free_pending_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)437 static void i40iw_free_pending_cqp_request(struct i40iw_cqp *cqp,
438 struct i40iw_cqp_request *cqp_request)
439 {
440 struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
441
442 if (cqp_request->waiting) {
443 cqp_request->compl_info.error = true;
444 cqp_request->request_done = true;
445 wake_up(&cqp_request->waitq);
446 }
447 i40iw_put_cqp_request(cqp, cqp_request);
448 wait_event_timeout(iwdev->close_wq,
449 !atomic_read(&cqp_request->refcount),
450 1000);
451 }
452
453 /**
454 * i40iw_cleanup_pending_cqp_op - clean-up cqp with no completions
455 * @iwdev: iwarp device
456 */
i40iw_cleanup_pending_cqp_op(struct i40iw_device * iwdev)457 void i40iw_cleanup_pending_cqp_op(struct i40iw_device *iwdev)
458 {
459 struct i40iw_sc_dev *dev = &iwdev->sc_dev;
460 struct i40iw_cqp *cqp = &iwdev->cqp;
461 struct i40iw_cqp_request *cqp_request = NULL;
462 struct cqp_commands_info *pcmdinfo = NULL;
463 u32 i, pending_work, wqe_idx;
464
465 pending_work = I40IW_RING_WORK_AVAILABLE(cqp->sc_cqp.sq_ring);
466 wqe_idx = I40IW_RING_GETCURRENT_TAIL(cqp->sc_cqp.sq_ring);
467 for (i = 0; i < pending_work; i++) {
468 cqp_request = (struct i40iw_cqp_request *)(unsigned long)cqp->scratch_array[wqe_idx];
469 if (cqp_request)
470 i40iw_free_pending_cqp_request(cqp, cqp_request);
471 wqe_idx = (wqe_idx + 1) % I40IW_RING_GETSIZE(cqp->sc_cqp.sq_ring);
472 }
473
474 while (!list_empty(&dev->cqp_cmd_head)) {
475 pcmdinfo = (struct cqp_commands_info *)i40iw_remove_head(&dev->cqp_cmd_head);
476 cqp_request = container_of(pcmdinfo, struct i40iw_cqp_request, info);
477 if (cqp_request)
478 i40iw_free_pending_cqp_request(cqp, cqp_request);
479 }
480 }
481
482 /**
483 * i40iw_free_qp - callback after destroy cqp completes
484 * @cqp_request: cqp request for destroy qp
485 * @num: not used
486 */
i40iw_free_qp(struct i40iw_cqp_request * cqp_request,u32 num)487 static void i40iw_free_qp(struct i40iw_cqp_request *cqp_request, u32 num)
488 {
489 struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)cqp_request->param;
490 struct i40iw_qp *iwqp = (struct i40iw_qp *)qp->back_qp;
491 struct i40iw_device *iwdev;
492 u32 qp_num = iwqp->ibqp.qp_num;
493
494 iwdev = iwqp->iwdev;
495
496 i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
497 i40iw_free_qp_resources(iwdev, iwqp, qp_num);
498 i40iw_rem_devusecount(iwdev);
499 }
500
501 /**
502 * i40iw_wait_event - wait for completion
503 * @iwdev: iwarp device
504 * @cqp_request: cqp request to wait
505 */
i40iw_wait_event(struct i40iw_device * iwdev,struct i40iw_cqp_request * cqp_request)506 static int i40iw_wait_event(struct i40iw_device *iwdev,
507 struct i40iw_cqp_request *cqp_request)
508 {
509 struct cqp_commands_info *info = &cqp_request->info;
510 struct i40iw_cqp *iwcqp = &iwdev->cqp;
511 struct i40iw_cqp_timeout cqp_timeout;
512 bool cqp_error = false;
513 int err_code = 0;
514 memset(&cqp_timeout, 0, sizeof(cqp_timeout));
515 cqp_timeout.compl_cqp_cmds = iwdev->sc_dev.cqp_cmd_stats[OP_COMPLETED_COMMANDS];
516 do {
517 if (wait_event_timeout(cqp_request->waitq,
518 cqp_request->request_done, CQP_COMPL_WAIT_TIME))
519 break;
520
521 i40iw_check_cqp_progress(&cqp_timeout, &iwdev->sc_dev);
522
523 if (cqp_timeout.count < CQP_TIMEOUT_THRESHOLD)
524 continue;
525
526 i40iw_pr_err("error cqp command 0x%x timed out", info->cqp_cmd);
527 err_code = -ETIME;
528 if (!iwdev->reset) {
529 iwdev->reset = true;
530 i40iw_request_reset(iwdev);
531 }
532 goto done;
533 } while (1);
534 cqp_error = cqp_request->compl_info.error;
535 if (cqp_error) {
536 i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
537 info->cqp_cmd, cqp_request->compl_info.maj_err_code,
538 cqp_request->compl_info.min_err_code);
539 err_code = -EPROTO;
540 goto done;
541 }
542 done:
543 i40iw_put_cqp_request(iwcqp, cqp_request);
544 return err_code;
545 }
546
547 /**
548 * i40iw_handle_cqp_op - process cqp command
549 * @iwdev: iwarp device
550 * @cqp_request: cqp request to process
551 */
i40iw_handle_cqp_op(struct i40iw_device * iwdev,struct i40iw_cqp_request * cqp_request)552 enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
553 struct i40iw_cqp_request
554 *cqp_request)
555 {
556 struct i40iw_sc_dev *dev = &iwdev->sc_dev;
557 enum i40iw_status_code status;
558 struct cqp_commands_info *info = &cqp_request->info;
559 int err_code = 0;
560
561 if (iwdev->reset) {
562 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
563 return I40IW_ERR_CQP_COMPL_ERROR;
564 }
565
566 status = i40iw_process_cqp_cmd(dev, info);
567 if (status) {
568 i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
569 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
570 return status;
571 }
572 if (cqp_request->waiting)
573 err_code = i40iw_wait_event(iwdev, cqp_request);
574 if (err_code)
575 status = I40IW_ERR_CQP_COMPL_ERROR;
576 return status;
577 }
578
579 /**
580 * i40iw_add_devusecount - add dev refcount
581 * @iwdev: dev for refcount
582 */
i40iw_add_devusecount(struct i40iw_device * iwdev)583 void i40iw_add_devusecount(struct i40iw_device *iwdev)
584 {
585 atomic64_inc(&iwdev->use_count);
586 }
587
588 /**
589 * i40iw_rem_devusecount - decrement refcount for dev
590 * @iwdev: device
591 */
i40iw_rem_devusecount(struct i40iw_device * iwdev)592 void i40iw_rem_devusecount(struct i40iw_device *iwdev)
593 {
594 if (!atomic64_dec_and_test(&iwdev->use_count))
595 return;
596 wake_up(&iwdev->close_wq);
597 }
598
599 /**
600 * i40iw_add_pdusecount - add pd refcount
601 * @iwpd: pd for refcount
602 */
i40iw_add_pdusecount(struct i40iw_pd * iwpd)603 void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
604 {
605 atomic_inc(&iwpd->usecount);
606 }
607
608 /**
609 * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
610 * @iwpd: pd for refcount
611 * @iwdev: iwarp device
612 */
i40iw_rem_pdusecount(struct i40iw_pd * iwpd,struct i40iw_device * iwdev)613 void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
614 {
615 if (!atomic_dec_and_test(&iwpd->usecount))
616 return;
617 i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
618 }
619
620 /**
621 * i40iw_add_ref - add refcount for qp
622 * @ibqp: iqarp qp
623 */
i40iw_add_ref(struct ib_qp * ibqp)624 void i40iw_add_ref(struct ib_qp *ibqp)
625 {
626 struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
627
628 atomic_inc(&iwqp->refcount);
629 }
630
631 /**
632 * i40iw_rem_ref - rem refcount for qp and free if 0
633 * @ibqp: iqarp qp
634 */
i40iw_rem_ref(struct ib_qp * ibqp)635 void i40iw_rem_ref(struct ib_qp *ibqp)
636 {
637 struct i40iw_qp *iwqp;
638 enum i40iw_status_code status;
639 struct i40iw_cqp_request *cqp_request;
640 struct cqp_commands_info *cqp_info;
641 struct i40iw_device *iwdev;
642 u32 qp_num;
643 unsigned long flags;
644
645 iwqp = to_iwqp(ibqp);
646 iwdev = iwqp->iwdev;
647 spin_lock_irqsave(&iwdev->qptable_lock, flags);
648 if (!atomic_dec_and_test(&iwqp->refcount)) {
649 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
650 return;
651 }
652
653 qp_num = iwqp->ibqp.qp_num;
654 iwdev->qp_table[qp_num] = NULL;
655 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
656 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
657 if (!cqp_request)
658 return;
659
660 cqp_request->callback_fcn = i40iw_free_qp;
661 cqp_request->param = (void *)&iwqp->sc_qp;
662 cqp_info = &cqp_request->info;
663 cqp_info->cqp_cmd = OP_QP_DESTROY;
664 cqp_info->post_sq = 1;
665 cqp_info->in.u.qp_destroy.qp = &iwqp->sc_qp;
666 cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
667 cqp_info->in.u.qp_destroy.remove_hash_idx = true;
668 status = i40iw_handle_cqp_op(iwdev, cqp_request);
669 if (!status)
670 return;
671
672 i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
673 i40iw_free_qp_resources(iwdev, iwqp, qp_num);
674 i40iw_rem_devusecount(iwdev);
675 }
676
677 /**
678 * i40iw_get_qp - get qp address
679 * @device: iwarp device
680 * @qpn: qp number
681 */
i40iw_get_qp(struct ib_device * device,int qpn)682 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
683 {
684 struct i40iw_device *iwdev = to_iwdev(device);
685
686 if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
687 return NULL;
688
689 return &iwdev->qp_table[qpn]->ibqp;
690 }
691
692 /**
693 * i40iw_debug_buf - print debug msg and buffer is mask set
694 * @dev: hardware control device structure
695 * @mask: mask to compare if to print debug buffer
696 * @buf: points buffer addr
697 * @size: saize of buffer to print
698 */
i40iw_debug_buf(struct i40iw_sc_dev * dev,enum i40iw_debug_flag mask,char * desc,u64 * buf,u32 size)699 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
700 enum i40iw_debug_flag mask,
701 char *desc,
702 u64 *buf,
703 u32 size)
704 {
705 u32 i;
706
707 if (!(dev->debug_mask & mask))
708 return;
709 i40iw_debug(dev, mask, "%s\n", desc);
710 i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
711 (unsigned long long)virt_to_phys(buf));
712
713 for (i = 0; i < size; i += 8)
714 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
715 }
716
717 /**
718 * i40iw_get_hw_addr - return hw addr
719 * @par: points to shared dev
720 */
i40iw_get_hw_addr(void * par)721 u8 __iomem *i40iw_get_hw_addr(void *par)
722 {
723 struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
724
725 return dev->hw->hw_addr;
726 }
727
728 /**
729 * i40iw_remove_head - return head entry and remove from list
730 * @list: list for entry
731 */
i40iw_remove_head(struct list_head * list)732 void *i40iw_remove_head(struct list_head *list)
733 {
734 struct list_head *entry;
735
736 if (list_empty(list))
737 return NULL;
738
739 entry = (void *)list->next;
740 list_del(entry);
741 return (void *)entry;
742 }
743
744 /**
745 * i40iw_allocate_dma_mem - Memory alloc helper fn
746 * @hw: pointer to the HW structure
747 * @mem: ptr to mem struct to fill out
748 * @size: size of memory requested
749 * @alignment: what to align the allocation to
750 */
i40iw_allocate_dma_mem(struct i40iw_hw * hw,struct i40iw_dma_mem * mem,u64 size,u32 alignment)751 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
752 struct i40iw_dma_mem *mem,
753 u64 size,
754 u32 alignment)
755 {
756 struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
757
758 if (!mem)
759 return I40IW_ERR_PARAM;
760 mem->size = ALIGN(size, alignment);
761 mem->va = dma_alloc_coherent(&pcidev->dev, mem->size,
762 (dma_addr_t *)&mem->pa, GFP_KERNEL);
763 if (!mem->va)
764 return I40IW_ERR_NO_MEMORY;
765 return 0;
766 }
767
768 /**
769 * i40iw_free_dma_mem - Memory free helper fn
770 * @hw: pointer to the HW structure
771 * @mem: ptr to mem struct to free
772 */
i40iw_free_dma_mem(struct i40iw_hw * hw,struct i40iw_dma_mem * mem)773 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
774 {
775 struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
776
777 if (!mem || !mem->va)
778 return;
779
780 dma_free_coherent(&pcidev->dev, mem->size,
781 mem->va, (dma_addr_t)mem->pa);
782 mem->va = NULL;
783 }
784
785 /**
786 * i40iw_allocate_virt_mem - virtual memory alloc helper fn
787 * @hw: pointer to the HW structure
788 * @mem: ptr to mem struct to fill out
789 * @size: size of memory requested
790 */
i40iw_allocate_virt_mem(struct i40iw_hw * hw,struct i40iw_virt_mem * mem,u32 size)791 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
792 struct i40iw_virt_mem *mem,
793 u32 size)
794 {
795 if (!mem)
796 return I40IW_ERR_PARAM;
797
798 mem->size = size;
799 mem->va = kzalloc(size, GFP_KERNEL);
800
801 if (mem->va)
802 return 0;
803 else
804 return I40IW_ERR_NO_MEMORY;
805 }
806
807 /**
808 * i40iw_free_virt_mem - virtual memory free helper fn
809 * @hw: pointer to the HW structure
810 * @mem: ptr to mem struct to free
811 */
i40iw_free_virt_mem(struct i40iw_hw * hw,struct i40iw_virt_mem * mem)812 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
813 struct i40iw_virt_mem *mem)
814 {
815 if (!mem)
816 return I40IW_ERR_PARAM;
817 /*
818 * mem->va points to the parent of mem, so both mem and mem->va
819 * can not be touched once mem->va is freed
820 */
821 kfree(mem->va);
822 return 0;
823 }
824
825 /**
826 * i40iw_cqp_sds_cmd - create cqp command for sd
827 * @dev: hardware control device structure
828 * @sd_info: information for sd cqp
829 *
830 */
i40iw_cqp_sds_cmd(struct i40iw_sc_dev * dev,struct i40iw_update_sds_info * sdinfo)831 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
832 struct i40iw_update_sds_info *sdinfo)
833 {
834 enum i40iw_status_code status;
835 struct i40iw_cqp_request *cqp_request;
836 struct cqp_commands_info *cqp_info;
837 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
838
839 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
840 if (!cqp_request)
841 return I40IW_ERR_NO_MEMORY;
842 cqp_info = &cqp_request->info;
843 memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
844 sizeof(cqp_info->in.u.update_pe_sds.info));
845 cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
846 cqp_info->post_sq = 1;
847 cqp_info->in.u.update_pe_sds.dev = dev;
848 cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
849 status = i40iw_handle_cqp_op(iwdev, cqp_request);
850 if (status)
851 i40iw_pr_err("CQP-OP Update SD's fail");
852 return status;
853 }
854
855 /**
856 * i40iw_qp_suspend_resume - cqp command for suspend/resume
857 * @dev: hardware control device structure
858 * @qp: hardware control qp
859 * @suspend: flag if suspend or resume
860 */
i40iw_qp_suspend_resume(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp,bool suspend)861 void i40iw_qp_suspend_resume(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp, bool suspend)
862 {
863 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
864 struct i40iw_cqp_request *cqp_request;
865 struct i40iw_sc_cqp *cqp = dev->cqp;
866 struct cqp_commands_info *cqp_info;
867 enum i40iw_status_code status;
868
869 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
870 if (!cqp_request)
871 return;
872
873 cqp_info = &cqp_request->info;
874 cqp_info->cqp_cmd = (suspend) ? OP_SUSPEND : OP_RESUME;
875 cqp_info->in.u.suspend_resume.cqp = cqp;
876 cqp_info->in.u.suspend_resume.qp = qp;
877 cqp_info->in.u.suspend_resume.scratch = (uintptr_t)cqp_request;
878 status = i40iw_handle_cqp_op(iwdev, cqp_request);
879 if (status)
880 i40iw_pr_err("CQP-OP QP Suspend/Resume fail");
881 }
882
883 /**
884 * i40iw_term_modify_qp - modify qp for term message
885 * @qp: hardware control qp
886 * @next_state: qp's next state
887 * @term: terminate code
888 * @term_len: length
889 */
i40iw_term_modify_qp(struct i40iw_sc_qp * qp,u8 next_state,u8 term,u8 term_len)890 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
891 {
892 struct i40iw_qp *iwqp;
893
894 iwqp = (struct i40iw_qp *)qp->back_qp;
895 i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
896 };
897
898 /**
899 * i40iw_terminate_done - after terminate is completed
900 * @qp: hardware control qp
901 * @timeout_occurred: indicates if terminate timer expired
902 */
i40iw_terminate_done(struct i40iw_sc_qp * qp,int timeout_occurred)903 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
904 {
905 struct i40iw_qp *iwqp;
906 u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
907 u8 hte = 0;
908 bool first_time;
909 unsigned long flags;
910
911 iwqp = (struct i40iw_qp *)qp->back_qp;
912 spin_lock_irqsave(&iwqp->lock, flags);
913 if (iwqp->hte_added) {
914 iwqp->hte_added = 0;
915 hte = 1;
916 }
917 first_time = !(qp->term_flags & I40IW_TERM_DONE);
918 qp->term_flags |= I40IW_TERM_DONE;
919 spin_unlock_irqrestore(&iwqp->lock, flags);
920 if (first_time) {
921 if (!timeout_occurred)
922 i40iw_terminate_del_timer(qp);
923 else
924 next_iwarp_state = I40IW_QP_STATE_CLOSING;
925
926 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
927 i40iw_cm_disconn(iwqp);
928 }
929 }
930
931 /**
932 * i40iw_terminate_imeout - timeout happened
933 * @context: points to iwarp qp
934 */
i40iw_terminate_timeout(struct timer_list * t)935 static void i40iw_terminate_timeout(struct timer_list *t)
936 {
937 struct i40iw_qp *iwqp = from_timer(iwqp, t, terminate_timer);
938 struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
939
940 i40iw_terminate_done(qp, 1);
941 i40iw_rem_ref(&iwqp->ibqp);
942 }
943
944 /**
945 * i40iw_terminate_start_timer - start terminate timeout
946 * @qp: hardware control qp
947 */
i40iw_terminate_start_timer(struct i40iw_sc_qp * qp)948 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
949 {
950 struct i40iw_qp *iwqp;
951
952 iwqp = (struct i40iw_qp *)qp->back_qp;
953 i40iw_add_ref(&iwqp->ibqp);
954 timer_setup(&iwqp->terminate_timer, i40iw_terminate_timeout, 0);
955 iwqp->terminate_timer.expires = jiffies + HZ;
956 add_timer(&iwqp->terminate_timer);
957 }
958
959 /**
960 * i40iw_terminate_del_timer - delete terminate timeout
961 * @qp: hardware control qp
962 */
i40iw_terminate_del_timer(struct i40iw_sc_qp * qp)963 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
964 {
965 struct i40iw_qp *iwqp;
966
967 iwqp = (struct i40iw_qp *)qp->back_qp;
968 if (del_timer(&iwqp->terminate_timer))
969 i40iw_rem_ref(&iwqp->ibqp);
970 }
971
972 /**
973 * i40iw_cqp_generic_worker - generic worker for cqp
974 * @work: work pointer
975 */
i40iw_cqp_generic_worker(struct work_struct * work)976 static void i40iw_cqp_generic_worker(struct work_struct *work)
977 {
978 struct i40iw_virtchnl_work_info *work_info =
979 &((struct virtchnl_work *)work)->work_info;
980
981 if (work_info->worker_vf_dev)
982 work_info->callback_fcn(work_info->worker_vf_dev);
983 }
984
985 /**
986 * i40iw_cqp_spawn_worker - spawn worket thread
987 * @iwdev: device struct pointer
988 * @work_info: work request info
989 * @iw_vf_idx: virtual function index
990 */
i40iw_cqp_spawn_worker(struct i40iw_sc_dev * dev,struct i40iw_virtchnl_work_info * work_info,u32 iw_vf_idx)991 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
992 struct i40iw_virtchnl_work_info *work_info,
993 u32 iw_vf_idx)
994 {
995 struct virtchnl_work *work;
996 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
997
998 work = &iwdev->virtchnl_w[iw_vf_idx];
999 memcpy(&work->work_info, work_info, sizeof(*work_info));
1000 INIT_WORK(&work->work, i40iw_cqp_generic_worker);
1001 queue_work(iwdev->virtchnl_wq, &work->work);
1002 }
1003
1004 /**
1005 * i40iw_cqp_manage_hmc_fcn_worker -
1006 * @work: work pointer for hmc info
1007 */
i40iw_cqp_manage_hmc_fcn_worker(struct work_struct * work)1008 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
1009 {
1010 struct i40iw_cqp_request *cqp_request =
1011 ((struct virtchnl_work *)work)->cqp_request;
1012 struct i40iw_ccq_cqe_info ccq_cqe_info;
1013 struct i40iw_hmc_fcn_info *hmcfcninfo =
1014 &cqp_request->info.in.u.manage_hmc_pm.info;
1015 struct i40iw_device *iwdev =
1016 (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
1017
1018 ccq_cqe_info.cqp = NULL;
1019 ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
1020 ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
1021 ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
1022 ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
1023 ccq_cqe_info.scratch = 0;
1024 ccq_cqe_info.error = cqp_request->compl_info.error;
1025 hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
1026 hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
1027 i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
1028 }
1029
1030 /**
1031 * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
1032 * @cqp_request: cqp request info struct for hmc fun
1033 * @unused: unused param of callback
1034 */
i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request * cqp_request,u32 unused)1035 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
1036 u32 unused)
1037 {
1038 struct virtchnl_work *work;
1039 struct i40iw_hmc_fcn_info *hmcfcninfo =
1040 &cqp_request->info.in.u.manage_hmc_pm.info;
1041 struct i40iw_device *iwdev =
1042 (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
1043 back_dev;
1044
1045 if (hmcfcninfo && hmcfcninfo->callback_fcn) {
1046 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
1047 atomic_inc(&cqp_request->refcount);
1048 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
1049 work->cqp_request = cqp_request;
1050 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
1051 queue_work(iwdev->virtchnl_wq, &work->work);
1052 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
1053 } else {
1054 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
1055 }
1056 }
1057
1058 /**
1059 * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
1060 * @dev: hardware control device structure
1061 * @hmcfcninfo: info for hmc
1062 */
i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev * dev,struct i40iw_hmc_fcn_info * hmcfcninfo)1063 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
1064 struct i40iw_hmc_fcn_info *hmcfcninfo)
1065 {
1066 enum i40iw_status_code status;
1067 struct i40iw_cqp_request *cqp_request;
1068 struct cqp_commands_info *cqp_info;
1069 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1070
1071 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
1072 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
1073 if (!cqp_request)
1074 return I40IW_ERR_NO_MEMORY;
1075 cqp_info = &cqp_request->info;
1076 cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
1077 cqp_request->param = hmcfcninfo;
1078 memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
1079 sizeof(*hmcfcninfo));
1080 cqp_info->in.u.manage_hmc_pm.dev = dev;
1081 cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
1082 cqp_info->post_sq = 1;
1083 cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
1084 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1085 if (status)
1086 i40iw_pr_err("CQP-OP Manage HMC fail");
1087 return status;
1088 }
1089
1090 /**
1091 * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
1092 * @iwdev: function device struct
1093 * @values_mem: buffer for fpm
1094 * @hmc_fn_id: function id for fpm
1095 */
i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * values_mem,u8 hmc_fn_id)1096 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
1097 struct i40iw_dma_mem *values_mem,
1098 u8 hmc_fn_id)
1099 {
1100 enum i40iw_status_code status;
1101 struct i40iw_cqp_request *cqp_request;
1102 struct cqp_commands_info *cqp_info;
1103 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1104
1105 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1106 if (!cqp_request)
1107 return I40IW_ERR_NO_MEMORY;
1108 cqp_info = &cqp_request->info;
1109 cqp_request->param = NULL;
1110 cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
1111 cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
1112 cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
1113 cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
1114 cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
1115 cqp_info->post_sq = 1;
1116 cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
1117 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1118 if (status)
1119 i40iw_pr_err("CQP-OP Query FPM fail");
1120 return status;
1121 }
1122
1123 /**
1124 * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
1125 * @dev: hardware control device structure
1126 * @values_mem: buffer with fpm values
1127 * @hmc_fn_id: function id for fpm
1128 */
i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * values_mem,u8 hmc_fn_id)1129 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
1130 struct i40iw_dma_mem *values_mem,
1131 u8 hmc_fn_id)
1132 {
1133 enum i40iw_status_code status;
1134 struct i40iw_cqp_request *cqp_request;
1135 struct cqp_commands_info *cqp_info;
1136 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1137
1138 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1139 if (!cqp_request)
1140 return I40IW_ERR_NO_MEMORY;
1141 cqp_info = &cqp_request->info;
1142 cqp_request->param = NULL;
1143 cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
1144 cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
1145 cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
1146 cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
1147 cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
1148 cqp_info->post_sq = 1;
1149 cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
1150 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1151 if (status)
1152 i40iw_pr_err("CQP-OP Commit FPM fail");
1153 return status;
1154 }
1155
1156 /**
1157 * i40iw_vf_wait_vchnl_resp - wait for channel msg
1158 * @iwdev: function's device struct
1159 */
i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev * dev)1160 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
1161 {
1162 struct i40iw_device *iwdev = dev->back_dev;
1163 int timeout_ret;
1164
1165 i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1166 __func__, __LINE__, dev, iwdev);
1167
1168 atomic_set(&iwdev->vchnl_msgs, 2);
1169 timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1170 (atomic_read(&iwdev->vchnl_msgs) == 1),
1171 I40IW_VCHNL_EVENT_TIMEOUT);
1172 atomic_dec(&iwdev->vchnl_msgs);
1173 if (!timeout_ret) {
1174 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1175 atomic_set(&iwdev->vchnl_msgs, 0);
1176 dev->vchnl_up = false;
1177 return I40IW_ERR_TIMEOUT;
1178 }
1179 wake_up(&dev->vf_reqs);
1180 return 0;
1181 }
1182
1183 /**
1184 * i40iw_cqp_cq_create_cmd - create a cq for the cqp
1185 * @dev: device pointer
1186 * @cq: pointer to created cq
1187 */
i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_cq * cq)1188 enum i40iw_status_code i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev *dev,
1189 struct i40iw_sc_cq *cq)
1190 {
1191 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1192 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1193 struct i40iw_cqp_request *cqp_request;
1194 struct cqp_commands_info *cqp_info;
1195 enum i40iw_status_code status;
1196
1197 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1198 if (!cqp_request)
1199 return I40IW_ERR_NO_MEMORY;
1200
1201 cqp_info = &cqp_request->info;
1202 cqp_info->cqp_cmd = OP_CQ_CREATE;
1203 cqp_info->post_sq = 1;
1204 cqp_info->in.u.cq_create.cq = cq;
1205 cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1206 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1207 if (status)
1208 i40iw_pr_err("CQP-OP Create QP fail");
1209
1210 return status;
1211 }
1212
1213 /**
1214 * i40iw_cqp_qp_create_cmd - create a qp for the cqp
1215 * @dev: device pointer
1216 * @qp: pointer to created qp
1217 */
i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1218 enum i40iw_status_code i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev *dev,
1219 struct i40iw_sc_qp *qp)
1220 {
1221 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1222 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1223 struct i40iw_cqp_request *cqp_request;
1224 struct cqp_commands_info *cqp_info;
1225 struct i40iw_create_qp_info *qp_info;
1226 enum i40iw_status_code status;
1227
1228 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1229 if (!cqp_request)
1230 return I40IW_ERR_NO_MEMORY;
1231
1232 cqp_info = &cqp_request->info;
1233 qp_info = &cqp_request->info.in.u.qp_create.info;
1234
1235 memset(qp_info, 0, sizeof(*qp_info));
1236
1237 qp_info->cq_num_valid = true;
1238 qp_info->next_iwarp_state = I40IW_QP_STATE_RTS;
1239
1240 cqp_info->cqp_cmd = OP_QP_CREATE;
1241 cqp_info->post_sq = 1;
1242 cqp_info->in.u.qp_create.qp = qp;
1243 cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
1244 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1245 if (status)
1246 i40iw_pr_err("CQP-OP QP create fail");
1247 return status;
1248 }
1249
1250 /**
1251 * i40iw_cqp_cq_destroy_cmd - destroy the cqp cq
1252 * @dev: device pointer
1253 * @cq: pointer to cq
1254 */
i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_cq * cq)1255 void i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_cq *cq)
1256 {
1257 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1258
1259 i40iw_cq_wq_destroy(iwdev, cq);
1260 }
1261
1262 /**
1263 * i40iw_cqp_qp_destroy_cmd - destroy the cqp
1264 * @dev: device pointer
1265 * @qp: pointer to qp
1266 */
i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1267 void i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1268 {
1269 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1270 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1271 struct i40iw_cqp_request *cqp_request;
1272 struct cqp_commands_info *cqp_info;
1273 enum i40iw_status_code status;
1274
1275 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1276 if (!cqp_request)
1277 return;
1278
1279 cqp_info = &cqp_request->info;
1280 memset(cqp_info, 0, sizeof(*cqp_info));
1281
1282 cqp_info->cqp_cmd = OP_QP_DESTROY;
1283 cqp_info->post_sq = 1;
1284 cqp_info->in.u.qp_destroy.qp = qp;
1285 cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
1286 cqp_info->in.u.qp_destroy.remove_hash_idx = true;
1287 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1288 if (status)
1289 i40iw_pr_err("CQP QP_DESTROY fail");
1290 }
1291
1292
1293 /**
1294 * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1295 * @dev: hardware control device structure
1296 * @qp: hardware control qp
1297 */
i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1298 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1299 {
1300 struct i40iw_gen_ae_info info;
1301 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1302
1303 i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1304 info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1305 info.ae_source = I40IW_AE_SOURCE_RQ;
1306 i40iw_gen_ae(iwdev, qp, &info, false);
1307 }
1308
1309 /**
1310 * i40iw_init_hash_desc - initialize hash for crc calculation
1311 * @desc: cryption type
1312 */
i40iw_init_hash_desc(struct shash_desc ** desc)1313 enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1314 {
1315 struct crypto_shash *tfm;
1316 struct shash_desc *tdesc;
1317
1318 tfm = crypto_alloc_shash("crc32c", 0, 0);
1319 if (IS_ERR(tfm))
1320 return I40IW_ERR_MPA_CRC;
1321
1322 tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1323 GFP_KERNEL);
1324 if (!tdesc) {
1325 crypto_free_shash(tfm);
1326 return I40IW_ERR_MPA_CRC;
1327 }
1328 tdesc->tfm = tfm;
1329 *desc = tdesc;
1330
1331 return 0;
1332 }
1333
1334 /**
1335 * i40iw_free_hash_desc - free hash desc
1336 * @desc: to be freed
1337 */
i40iw_free_hash_desc(struct shash_desc * desc)1338 void i40iw_free_hash_desc(struct shash_desc *desc)
1339 {
1340 if (desc) {
1341 crypto_free_shash(desc->tfm);
1342 kfree(desc);
1343 }
1344 }
1345
1346 /**
1347 * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1348 * @dev: hardware control device structure
1349 * @mem: buffer ptr for fpm to be allocated
1350 * @return: memory allocation status
1351 */
i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * mem)1352 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1353 struct i40iw_dma_mem *mem)
1354 {
1355 enum i40iw_status_code status;
1356 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1357
1358 status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1359 I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1360 return status;
1361 }
1362
1363 /**
1364 * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1365 * @desc: desc for hash
1366 * @addr: address of buffer for crc
1367 * @length: length of buffer
1368 * @value: value to be compared
1369 */
i40iw_ieq_check_mpacrc(struct shash_desc * desc,void * addr,u32 length,u32 value)1370 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1371 void *addr,
1372 u32 length,
1373 u32 value)
1374 {
1375 u32 crc = 0;
1376 int ret;
1377 enum i40iw_status_code ret_code = 0;
1378
1379 crypto_shash_init(desc);
1380 ret = crypto_shash_update(desc, addr, length);
1381 if (!ret)
1382 crypto_shash_final(desc, (u8 *)&crc);
1383 if (crc != value) {
1384 i40iw_pr_err("mpa crc check fail\n");
1385 ret_code = I40IW_ERR_MPA_CRC;
1386 }
1387 return ret_code;
1388 }
1389
1390 /**
1391 * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1392 * @dev: hardware control device structure
1393 * @buf: receive puda buffer on exception q
1394 */
i40iw_ieq_get_qp(struct i40iw_sc_dev * dev,struct i40iw_puda_buf * buf)1395 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1396 struct i40iw_puda_buf *buf)
1397 {
1398 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1399 struct i40iw_qp *iwqp;
1400 struct i40iw_cm_node *cm_node;
1401 u32 loc_addr[4], rem_addr[4];
1402 u16 loc_port, rem_port;
1403 struct ipv6hdr *ip6h;
1404 struct iphdr *iph = (struct iphdr *)buf->iph;
1405 struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1406
1407 if (iph->version == 4) {
1408 memset(loc_addr, 0, sizeof(loc_addr));
1409 loc_addr[0] = ntohl(iph->daddr);
1410 memset(rem_addr, 0, sizeof(rem_addr));
1411 rem_addr[0] = ntohl(iph->saddr);
1412 } else {
1413 ip6h = (struct ipv6hdr *)buf->iph;
1414 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1415 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1416 }
1417 loc_port = ntohs(tcph->dest);
1418 rem_port = ntohs(tcph->source);
1419
1420 cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1421 loc_addr, false, true);
1422 if (!cm_node)
1423 return NULL;
1424 iwqp = cm_node->iwqp;
1425 return &iwqp->sc_qp;
1426 }
1427
1428 /**
1429 * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1430 * @buf: puda to update
1431 * @length: length of buffer
1432 * @seqnum: seq number for tcp
1433 */
i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf * buf,u16 length,u32 seqnum)1434 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1435 {
1436 struct tcphdr *tcph;
1437 struct iphdr *iph;
1438 u16 iphlen;
1439 u16 packetsize;
1440 u8 *addr = (u8 *)buf->mem.va;
1441
1442 iphlen = (buf->ipv4) ? 20 : 40;
1443 iph = (struct iphdr *)(addr + buf->maclen);
1444 tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1445 packetsize = length + buf->tcphlen + iphlen;
1446
1447 iph->tot_len = htons(packetsize);
1448 tcph->seq = htonl(seqnum);
1449 }
1450
1451 /**
1452 * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1453 * @info: to get information
1454 * @buf: puda buffer
1455 */
i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info * info,struct i40iw_puda_buf * buf)1456 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1457 struct i40iw_puda_buf *buf)
1458 {
1459 struct iphdr *iph;
1460 struct ipv6hdr *ip6h;
1461 struct tcphdr *tcph;
1462 u16 iphlen;
1463 u16 pkt_len;
1464 u8 *mem = (u8 *)buf->mem.va;
1465 struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1466
1467 if (ethh->h_proto == htons(0x8100)) {
1468 info->vlan_valid = true;
1469 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1470 }
1471 buf->maclen = (info->vlan_valid) ? 18 : 14;
1472 iphlen = (info->l3proto) ? 40 : 20;
1473 buf->ipv4 = (info->l3proto) ? false : true;
1474 buf->iph = mem + buf->maclen;
1475 iph = (struct iphdr *)buf->iph;
1476
1477 buf->tcph = buf->iph + iphlen;
1478 tcph = (struct tcphdr *)buf->tcph;
1479
1480 if (buf->ipv4) {
1481 pkt_len = ntohs(iph->tot_len);
1482 } else {
1483 ip6h = (struct ipv6hdr *)buf->iph;
1484 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1485 }
1486
1487 buf->totallen = pkt_len + buf->maclen;
1488
1489 if (info->payload_len < buf->totallen) {
1490 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1491 info->payload_len, buf->totallen);
1492 return I40IW_ERR_INVALID_SIZE;
1493 }
1494
1495 buf->tcphlen = (tcph->doff) << 2;
1496 buf->datalen = pkt_len - iphlen - buf->tcphlen;
1497 buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1498 buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1499 buf->seqnum = ntohl(tcph->seq);
1500 return 0;
1501 }
1502
1503 /**
1504 * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1505 * @vsi: pointer to the vsi structure
1506 */
i40iw_hw_stats_timeout(struct timer_list * t)1507 static void i40iw_hw_stats_timeout(struct timer_list *t)
1508 {
1509 struct i40iw_vsi_pestat *pf_devstat = from_timer(pf_devstat, t,
1510 stats_timer);
1511 struct i40iw_sc_vsi *sc_vsi = pf_devstat->vsi;
1512 struct i40iw_sc_dev *pf_dev = sc_vsi->dev;
1513 struct i40iw_vsi_pestat *vf_devstat = NULL;
1514 u16 iw_vf_idx;
1515 unsigned long flags;
1516
1517 /*PF*/
1518 i40iw_hw_stats_read_all(pf_devstat, &pf_devstat->hw_stats);
1519
1520 for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1521 spin_lock_irqsave(&pf_devstat->lock, flags);
1522 if (pf_dev->vf_dev[iw_vf_idx]) {
1523 if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1524 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->pestat;
1525 i40iw_hw_stats_read_all(vf_devstat, &vf_devstat->hw_stats);
1526 }
1527 }
1528 spin_unlock_irqrestore(&pf_devstat->lock, flags);
1529 }
1530
1531 mod_timer(&pf_devstat->stats_timer,
1532 jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1533 }
1534
1535 /**
1536 * i40iw_hw_stats_start_timer - Start periodic stats timer
1537 * @vsi: pointer to the vsi structure
1538 */
i40iw_hw_stats_start_timer(struct i40iw_sc_vsi * vsi)1539 void i40iw_hw_stats_start_timer(struct i40iw_sc_vsi *vsi)
1540 {
1541 struct i40iw_vsi_pestat *devstat = vsi->pestat;
1542
1543 timer_setup(&devstat->stats_timer, i40iw_hw_stats_timeout, 0);
1544 mod_timer(&devstat->stats_timer,
1545 jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1546 }
1547
1548 /**
1549 * i40iw_hw_stats_stop_timer - Delete periodic stats timer
1550 * @vsi: pointer to the vsi structure
1551 */
i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi * vsi)1552 void i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi *vsi)
1553 {
1554 struct i40iw_vsi_pestat *devstat = vsi->pestat;
1555
1556 del_timer_sync(&devstat->stats_timer);
1557 }
1558