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 * @ipv4: flag indicating IPv4 when true
59 * @mac_addr: mac address ptr
60 * @action: modify, delete or add
61 */
i40iw_arp_table(struct i40iw_device * iwdev,u32 * ip_addr,bool ipv4,u8 * mac_addr,u32 action)62 int i40iw_arp_table(struct i40iw_device *iwdev,
63 u32 *ip_addr,
64 bool ipv4,
65 u8 *mac_addr,
66 u32 action)
67 {
68 int arp_index;
69 int err;
70 u32 ip[4];
71
72 if (ipv4) {
73 memset(ip, 0, sizeof(ip));
74 ip[0] = *ip_addr;
75 } else {
76 memcpy(ip, ip_addr, sizeof(ip));
77 }
78
79 for (arp_index = 0; (u32)arp_index < iwdev->arp_table_size; arp_index++)
80 if (memcmp(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip)) == 0)
81 break;
82 switch (action) {
83 case I40IW_ARP_ADD:
84 if (arp_index != iwdev->arp_table_size)
85 return -1;
86
87 arp_index = 0;
88 err = i40iw_alloc_resource(iwdev, iwdev->allocated_arps,
89 iwdev->arp_table_size,
90 (u32 *)&arp_index,
91 &iwdev->next_arp_index);
92
93 if (err)
94 return err;
95
96 memcpy(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip));
97 ether_addr_copy(iwdev->arp_table[arp_index].mac_addr, mac_addr);
98 break;
99 case I40IW_ARP_RESOLVE:
100 if (arp_index == iwdev->arp_table_size)
101 return -1;
102 break;
103 case I40IW_ARP_DELETE:
104 if (arp_index == iwdev->arp_table_size)
105 return -1;
106 memset(iwdev->arp_table[arp_index].ip_addr, 0,
107 sizeof(iwdev->arp_table[arp_index].ip_addr));
108 eth_zero_addr(iwdev->arp_table[arp_index].mac_addr);
109 i40iw_free_resource(iwdev, iwdev->allocated_arps, arp_index);
110 break;
111 default:
112 return -1;
113 }
114 return arp_index;
115 }
116
117 /**
118 * i40iw_wr32 - write 32 bits to hw register
119 * @hw: hardware information including registers
120 * @reg: register offset
121 * @value: vvalue to write to register
122 */
i40iw_wr32(struct i40iw_hw * hw,u32 reg,u32 value)123 inline void i40iw_wr32(struct i40iw_hw *hw, u32 reg, u32 value)
124 {
125 writel(value, hw->hw_addr + reg);
126 }
127
128 /**
129 * i40iw_rd32 - read a 32 bit hw register
130 * @hw: hardware information including registers
131 * @reg: register offset
132 *
133 * Return value of register content
134 */
i40iw_rd32(struct i40iw_hw * hw,u32 reg)135 inline u32 i40iw_rd32(struct i40iw_hw *hw, u32 reg)
136 {
137 return readl(hw->hw_addr + reg);
138 }
139
140 /**
141 * i40iw_inetaddr_event - system notifier for ipv4 addr events
142 * @notifier: not used
143 * @event: event for notifier
144 * @ptr: if address
145 */
i40iw_inetaddr_event(struct notifier_block * notifier,unsigned long event,void * ptr)146 int i40iw_inetaddr_event(struct notifier_block *notifier,
147 unsigned long event,
148 void *ptr)
149 {
150 struct in_ifaddr *ifa = ptr;
151 struct net_device *event_netdev = ifa->ifa_dev->dev;
152 struct net_device *netdev;
153 struct net_device *upper_dev;
154 struct i40iw_device *iwdev;
155 struct i40iw_handler *hdl;
156 u32 local_ipaddr;
157 u32 action = I40IW_ARP_ADD;
158
159 hdl = i40iw_find_netdev(event_netdev);
160 if (!hdl)
161 return NOTIFY_DONE;
162
163 iwdev = &hdl->device;
164 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
165 return NOTIFY_DONE;
166
167 netdev = iwdev->ldev->netdev;
168 upper_dev = netdev_master_upper_dev_get(netdev);
169 if (netdev != event_netdev)
170 return NOTIFY_DONE;
171
172 if (upper_dev) {
173 struct in_device *in;
174
175 rcu_read_lock();
176 in = __in_dev_get_rcu(upper_dev);
177
178 local_ipaddr = 0;
179 if (in) {
180 struct in_ifaddr *ifa;
181
182 ifa = rcu_dereference(in->ifa_list);
183 if (ifa)
184 local_ipaddr = ntohl(ifa->ifa_address);
185 }
186
187 rcu_read_unlock();
188 } else {
189 local_ipaddr = ntohl(ifa->ifa_address);
190 }
191 switch (event) {
192 case NETDEV_DOWN:
193 action = I40IW_ARP_DELETE;
194 fallthrough;
195 case NETDEV_UP:
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 * @notifier: 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 fallthrough;
251 case NETDEV_UP:
252 case NETDEV_CHANGEADDR:
253 i40iw_manage_arp_cache(iwdev,
254 netdev->dev_addr,
255 local_ipaddr6,
256 false,
257 action);
258 i40iw_if_notify(iwdev, netdev, local_ipaddr6, false,
259 (action == I40IW_ARP_ADD) ? true : false);
260 break;
261 default:
262 break;
263 }
264 return NOTIFY_DONE;
265 }
266
267 /**
268 * i40iw_net_event - system notifier for netevents
269 * @notifier: not used
270 * @event: event for notifier
271 * @ptr: neighbor
272 */
i40iw_net_event(struct notifier_block * notifier,unsigned long event,void * ptr)273 int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
274 {
275 struct neighbour *neigh = ptr;
276 struct i40iw_device *iwdev;
277 struct i40iw_handler *iwhdl;
278 __be32 *p;
279 u32 local_ipaddr[4];
280
281 switch (event) {
282 case NETEVENT_NEIGH_UPDATE:
283 iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
284 if (!iwhdl)
285 return NOTIFY_DONE;
286 iwdev = &iwhdl->device;
287 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
288 return NOTIFY_DONE;
289 p = (__be32 *)neigh->primary_key;
290 i40iw_copy_ip_ntohl(local_ipaddr, p);
291 if (neigh->nud_state & NUD_VALID) {
292 i40iw_manage_arp_cache(iwdev,
293 neigh->ha,
294 local_ipaddr,
295 false,
296 I40IW_ARP_ADD);
297
298 } else {
299 i40iw_manage_arp_cache(iwdev,
300 neigh->ha,
301 local_ipaddr,
302 false,
303 I40IW_ARP_DELETE);
304 }
305 break;
306 default:
307 break;
308 }
309 return NOTIFY_DONE;
310 }
311
312 /**
313 * i40iw_netdevice_event - system notifier for netdev events
314 * @notifier: not used
315 * @event: event for notifier
316 * @ptr: netdev
317 */
i40iw_netdevice_event(struct notifier_block * notifier,unsigned long event,void * ptr)318 int i40iw_netdevice_event(struct notifier_block *notifier,
319 unsigned long event,
320 void *ptr)
321 {
322 struct net_device *event_netdev;
323 struct net_device *netdev;
324 struct i40iw_device *iwdev;
325 struct i40iw_handler *hdl;
326
327 event_netdev = netdev_notifier_info_to_dev(ptr);
328
329 hdl = i40iw_find_netdev(event_netdev);
330 if (!hdl)
331 return NOTIFY_DONE;
332
333 iwdev = &hdl->device;
334 if (iwdev->init_state < RDMA_DEV_REGISTERED || iwdev->closing)
335 return NOTIFY_DONE;
336
337 netdev = iwdev->ldev->netdev;
338 if (netdev != event_netdev)
339 return NOTIFY_DONE;
340
341 iwdev->iw_status = 1;
342
343 switch (event) {
344 case NETDEV_DOWN:
345 iwdev->iw_status = 0;
346 fallthrough;
347 case NETDEV_UP:
348 i40iw_port_ibevent(iwdev);
349 break;
350 default:
351 break;
352 }
353 return NOTIFY_DONE;
354 }
355
356 /**
357 * i40iw_get_cqp_request - get cqp struct
358 * @cqp: device cqp ptr
359 * @wait: cqp to be used in wait mode
360 */
i40iw_get_cqp_request(struct i40iw_cqp * cqp,bool wait)361 struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
362 {
363 struct i40iw_cqp_request *cqp_request = NULL;
364 unsigned long flags;
365
366 spin_lock_irqsave(&cqp->req_lock, flags);
367 if (!list_empty(&cqp->cqp_avail_reqs)) {
368 cqp_request = list_entry(cqp->cqp_avail_reqs.next,
369 struct i40iw_cqp_request, list);
370 list_del_init(&cqp_request->list);
371 }
372 spin_unlock_irqrestore(&cqp->req_lock, flags);
373 if (!cqp_request) {
374 cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
375 if (cqp_request) {
376 cqp_request->dynamic = true;
377 INIT_LIST_HEAD(&cqp_request->list);
378 init_waitqueue_head(&cqp_request->waitq);
379 }
380 }
381 if (!cqp_request) {
382 i40iw_pr_err("CQP Request Fail: No Memory");
383 return NULL;
384 }
385
386 if (wait) {
387 atomic_set(&cqp_request->refcount, 2);
388 cqp_request->waiting = true;
389 } else {
390 atomic_set(&cqp_request->refcount, 1);
391 }
392 return cqp_request;
393 }
394
395 /**
396 * i40iw_free_cqp_request - free cqp request
397 * @cqp: cqp ptr
398 * @cqp_request: to be put back in cqp list
399 */
i40iw_free_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)400 void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
401 {
402 struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
403 unsigned long flags;
404
405 if (cqp_request->dynamic) {
406 kfree(cqp_request);
407 } else {
408 cqp_request->request_done = false;
409 cqp_request->callback_fcn = NULL;
410 cqp_request->waiting = false;
411
412 spin_lock_irqsave(&cqp->req_lock, flags);
413 list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
414 spin_unlock_irqrestore(&cqp->req_lock, flags);
415 }
416 wake_up(&iwdev->close_wq);
417 }
418
419 /**
420 * i40iw_put_cqp_request - dec ref count and free if 0
421 * @cqp: cqp ptr
422 * @cqp_request: to be put back in cqp list
423 */
i40iw_put_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)424 void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
425 struct i40iw_cqp_request *cqp_request)
426 {
427 if (atomic_dec_and_test(&cqp_request->refcount))
428 i40iw_free_cqp_request(cqp, cqp_request);
429 }
430
431 /**
432 * i40iw_free_pending_cqp_request -free pending cqp request objs
433 * @cqp: cqp ptr
434 * @cqp_request: to be put back in cqp list
435 */
i40iw_free_pending_cqp_request(struct i40iw_cqp * cqp,struct i40iw_cqp_request * cqp_request)436 static void i40iw_free_pending_cqp_request(struct i40iw_cqp *cqp,
437 struct i40iw_cqp_request *cqp_request)
438 {
439 struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
440
441 if (cqp_request->waiting) {
442 cqp_request->compl_info.error = true;
443 cqp_request->request_done = true;
444 wake_up(&cqp_request->waitq);
445 }
446 i40iw_put_cqp_request(cqp, cqp_request);
447 wait_event_timeout(iwdev->close_wq,
448 !atomic_read(&cqp_request->refcount),
449 1000);
450 }
451
452 /**
453 * i40iw_cleanup_pending_cqp_op - clean-up cqp with no completions
454 * @iwdev: iwarp device
455 */
i40iw_cleanup_pending_cqp_op(struct i40iw_device * iwdev)456 void i40iw_cleanup_pending_cqp_op(struct i40iw_device *iwdev)
457 {
458 struct i40iw_sc_dev *dev = &iwdev->sc_dev;
459 struct i40iw_cqp *cqp = &iwdev->cqp;
460 struct i40iw_cqp_request *cqp_request = NULL;
461 struct cqp_commands_info *pcmdinfo = NULL;
462 u32 i, pending_work, wqe_idx;
463
464 pending_work = I40IW_RING_WORK_AVAILABLE(cqp->sc_cqp.sq_ring);
465 wqe_idx = I40IW_RING_GETCURRENT_TAIL(cqp->sc_cqp.sq_ring);
466 for (i = 0; i < pending_work; i++) {
467 cqp_request = (struct i40iw_cqp_request *)(unsigned long)cqp->scratch_array[wqe_idx];
468 if (cqp_request)
469 i40iw_free_pending_cqp_request(cqp, cqp_request);
470 wqe_idx = (wqe_idx + 1) % I40IW_RING_GETSIZE(cqp->sc_cqp.sq_ring);
471 }
472
473 while (!list_empty(&dev->cqp_cmd_head)) {
474 pcmdinfo = (struct cqp_commands_info *)i40iw_remove_head(&dev->cqp_cmd_head);
475 cqp_request = container_of(pcmdinfo, struct i40iw_cqp_request, info);
476 if (cqp_request)
477 i40iw_free_pending_cqp_request(cqp, cqp_request);
478 }
479 }
480
481 /**
482 * i40iw_wait_event - wait for completion
483 * @iwdev: iwarp device
484 * @cqp_request: cqp request to wait
485 */
i40iw_wait_event(struct i40iw_device * iwdev,struct i40iw_cqp_request * cqp_request)486 static int i40iw_wait_event(struct i40iw_device *iwdev,
487 struct i40iw_cqp_request *cqp_request)
488 {
489 struct cqp_commands_info *info = &cqp_request->info;
490 struct i40iw_cqp *iwcqp = &iwdev->cqp;
491 struct i40iw_cqp_timeout cqp_timeout;
492 bool cqp_error = false;
493 int err_code = 0;
494 memset(&cqp_timeout, 0, sizeof(cqp_timeout));
495 cqp_timeout.compl_cqp_cmds = iwdev->sc_dev.cqp_cmd_stats[OP_COMPLETED_COMMANDS];
496 do {
497 if (wait_event_timeout(cqp_request->waitq,
498 cqp_request->request_done, CQP_COMPL_WAIT_TIME))
499 break;
500
501 i40iw_check_cqp_progress(&cqp_timeout, &iwdev->sc_dev);
502
503 if (cqp_timeout.count < CQP_TIMEOUT_THRESHOLD)
504 continue;
505
506 i40iw_pr_err("error cqp command 0x%x timed out", info->cqp_cmd);
507 err_code = -ETIME;
508 if (!iwdev->reset) {
509 iwdev->reset = true;
510 i40iw_request_reset(iwdev);
511 }
512 goto done;
513 } while (1);
514 cqp_error = cqp_request->compl_info.error;
515 if (cqp_error) {
516 i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
517 info->cqp_cmd, cqp_request->compl_info.maj_err_code,
518 cqp_request->compl_info.min_err_code);
519 err_code = -EPROTO;
520 goto done;
521 }
522 done:
523 i40iw_put_cqp_request(iwcqp, cqp_request);
524 return err_code;
525 }
526
527 /**
528 * i40iw_handle_cqp_op - process cqp command
529 * @iwdev: iwarp device
530 * @cqp_request: cqp request to process
531 */
i40iw_handle_cqp_op(struct i40iw_device * iwdev,struct i40iw_cqp_request * cqp_request)532 enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
533 struct i40iw_cqp_request
534 *cqp_request)
535 {
536 struct i40iw_sc_dev *dev = &iwdev->sc_dev;
537 enum i40iw_status_code status;
538 struct cqp_commands_info *info = &cqp_request->info;
539 int err_code = 0;
540
541 if (iwdev->reset) {
542 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
543 return I40IW_ERR_CQP_COMPL_ERROR;
544 }
545
546 status = i40iw_process_cqp_cmd(dev, info);
547 if (status) {
548 i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
549 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
550 return status;
551 }
552 if (cqp_request->waiting)
553 err_code = i40iw_wait_event(iwdev, cqp_request);
554 if (err_code)
555 status = I40IW_ERR_CQP_COMPL_ERROR;
556 return status;
557 }
558
559 /**
560 * i40iw_add_devusecount - add dev refcount
561 * @iwdev: dev for refcount
562 */
i40iw_add_devusecount(struct i40iw_device * iwdev)563 void i40iw_add_devusecount(struct i40iw_device *iwdev)
564 {
565 atomic64_inc(&iwdev->use_count);
566 }
567
568 /**
569 * i40iw_rem_devusecount - decrement refcount for dev
570 * @iwdev: device
571 */
i40iw_rem_devusecount(struct i40iw_device * iwdev)572 void i40iw_rem_devusecount(struct i40iw_device *iwdev)
573 {
574 if (!atomic64_dec_and_test(&iwdev->use_count))
575 return;
576 wake_up(&iwdev->close_wq);
577 }
578
579 /**
580 * i40iw_add_pdusecount - add pd refcount
581 * @iwpd: pd for refcount
582 */
i40iw_add_pdusecount(struct i40iw_pd * iwpd)583 void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
584 {
585 atomic_inc(&iwpd->usecount);
586 }
587
588 /**
589 * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
590 * @iwpd: pd for refcount
591 * @iwdev: iwarp device
592 */
i40iw_rem_pdusecount(struct i40iw_pd * iwpd,struct i40iw_device * iwdev)593 void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
594 {
595 if (!atomic_dec_and_test(&iwpd->usecount))
596 return;
597 i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
598 }
599
600 /**
601 * i40iw_qp_add_ref - add refcount for qp
602 * @ibqp: iqarp qp
603 */
i40iw_qp_add_ref(struct ib_qp * ibqp)604 void i40iw_qp_add_ref(struct ib_qp *ibqp)
605 {
606 struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
607
608 refcount_inc(&iwqp->refcount);
609 }
610
611 /**
612 * i40iw_qp_rem_ref - rem refcount for qp and free if 0
613 * @ibqp: iqarp qp
614 */
i40iw_qp_rem_ref(struct ib_qp * ibqp)615 void i40iw_qp_rem_ref(struct ib_qp *ibqp)
616 {
617 struct i40iw_qp *iwqp;
618 struct i40iw_device *iwdev;
619 u32 qp_num;
620 unsigned long flags;
621
622 iwqp = to_iwqp(ibqp);
623 iwdev = iwqp->iwdev;
624 spin_lock_irqsave(&iwdev->qptable_lock, flags);
625 if (!refcount_dec_and_test(&iwqp->refcount)) {
626 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
627 return;
628 }
629
630 qp_num = iwqp->ibqp.qp_num;
631 iwdev->qp_table[qp_num] = NULL;
632 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
633 complete(&iwqp->free_qp);
634
635 }
636
637 /**
638 * i40iw_get_qp - get qp address
639 * @device: iwarp device
640 * @qpn: qp number
641 */
i40iw_get_qp(struct ib_device * device,int qpn)642 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
643 {
644 struct i40iw_device *iwdev = to_iwdev(device);
645
646 if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
647 return NULL;
648
649 return &iwdev->qp_table[qpn]->ibqp;
650 }
651
652 /**
653 * i40iw_debug_buf - print debug msg and buffer is mask set
654 * @dev: hardware control device structure
655 * @mask: mask to compare if to print debug buffer
656 * @desc: identifying string
657 * @buf: points buffer addr
658 * @size: saize of buffer to print
659 */
i40iw_debug_buf(struct i40iw_sc_dev * dev,enum i40iw_debug_flag mask,char * desc,u64 * buf,u32 size)660 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
661 enum i40iw_debug_flag mask,
662 char *desc,
663 u64 *buf,
664 u32 size)
665 {
666 u32 i;
667
668 if (!(dev->debug_mask & mask))
669 return;
670 i40iw_debug(dev, mask, "%s\n", desc);
671 i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
672 (unsigned long long)virt_to_phys(buf));
673
674 for (i = 0; i < size; i += 8)
675 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
676 }
677
678 /**
679 * i40iw_get_hw_addr - return hw addr
680 * @par: points to shared dev
681 */
i40iw_get_hw_addr(void * par)682 u8 __iomem *i40iw_get_hw_addr(void *par)
683 {
684 struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
685
686 return dev->hw->hw_addr;
687 }
688
689 /**
690 * i40iw_remove_head - return head entry and remove from list
691 * @list: list for entry
692 */
i40iw_remove_head(struct list_head * list)693 void *i40iw_remove_head(struct list_head *list)
694 {
695 struct list_head *entry;
696
697 if (list_empty(list))
698 return NULL;
699
700 entry = (void *)list->next;
701 list_del(entry);
702 return (void *)entry;
703 }
704
705 /**
706 * i40iw_allocate_dma_mem - Memory alloc helper fn
707 * @hw: pointer to the HW structure
708 * @mem: ptr to mem struct to fill out
709 * @size: size of memory requested
710 * @alignment: what to align the allocation to
711 */
i40iw_allocate_dma_mem(struct i40iw_hw * hw,struct i40iw_dma_mem * mem,u64 size,u32 alignment)712 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
713 struct i40iw_dma_mem *mem,
714 u64 size,
715 u32 alignment)
716 {
717 struct pci_dev *pcidev = hw->pcidev;
718
719 if (!mem)
720 return I40IW_ERR_PARAM;
721 mem->size = ALIGN(size, alignment);
722 mem->va = dma_alloc_coherent(&pcidev->dev, mem->size,
723 (dma_addr_t *)&mem->pa, GFP_KERNEL);
724 if (!mem->va)
725 return I40IW_ERR_NO_MEMORY;
726 return 0;
727 }
728
729 /**
730 * i40iw_free_dma_mem - Memory free helper fn
731 * @hw: pointer to the HW structure
732 * @mem: ptr to mem struct to free
733 */
i40iw_free_dma_mem(struct i40iw_hw * hw,struct i40iw_dma_mem * mem)734 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
735 {
736 struct pci_dev *pcidev = hw->pcidev;
737
738 if (!mem || !mem->va)
739 return;
740
741 dma_free_coherent(&pcidev->dev, mem->size,
742 mem->va, (dma_addr_t)mem->pa);
743 mem->va = NULL;
744 }
745
746 /**
747 * i40iw_allocate_virt_mem - virtual memory alloc helper fn
748 * @hw: pointer to the HW structure
749 * @mem: ptr to mem struct to fill out
750 * @size: size of memory requested
751 */
i40iw_allocate_virt_mem(struct i40iw_hw * hw,struct i40iw_virt_mem * mem,u32 size)752 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
753 struct i40iw_virt_mem *mem,
754 u32 size)
755 {
756 if (!mem)
757 return I40IW_ERR_PARAM;
758
759 mem->size = size;
760 mem->va = kzalloc(size, GFP_KERNEL);
761
762 if (mem->va)
763 return 0;
764 else
765 return I40IW_ERR_NO_MEMORY;
766 }
767
768 /**
769 * i40iw_free_virt_mem - virtual memory free helper fn
770 * @hw: pointer to the HW structure
771 * @mem: ptr to mem struct to free
772 */
i40iw_free_virt_mem(struct i40iw_hw * hw,struct i40iw_virt_mem * mem)773 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
774 struct i40iw_virt_mem *mem)
775 {
776 if (!mem)
777 return I40IW_ERR_PARAM;
778 /*
779 * mem->va points to the parent of mem, so both mem and mem->va
780 * can not be touched once mem->va is freed
781 */
782 kfree(mem->va);
783 return 0;
784 }
785
786 /**
787 * i40iw_cqp_sds_cmd - create cqp command for sd
788 * @dev: hardware control device structure
789 * @sdinfo: information for sd cqp
790 *
791 */
i40iw_cqp_sds_cmd(struct i40iw_sc_dev * dev,struct i40iw_update_sds_info * sdinfo)792 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
793 struct i40iw_update_sds_info *sdinfo)
794 {
795 enum i40iw_status_code status;
796 struct i40iw_cqp_request *cqp_request;
797 struct cqp_commands_info *cqp_info;
798 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
799
800 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
801 if (!cqp_request)
802 return I40IW_ERR_NO_MEMORY;
803 cqp_info = &cqp_request->info;
804 memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
805 sizeof(cqp_info->in.u.update_pe_sds.info));
806 cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
807 cqp_info->post_sq = 1;
808 cqp_info->in.u.update_pe_sds.dev = dev;
809 cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
810 status = i40iw_handle_cqp_op(iwdev, cqp_request);
811 if (status)
812 i40iw_pr_err("CQP-OP Update SD's fail");
813 return status;
814 }
815
816 /**
817 * i40iw_qp_suspend_resume - cqp command for suspend/resume
818 * @dev: hardware control device structure
819 * @qp: hardware control qp
820 * @suspend: flag if suspend or resume
821 */
i40iw_qp_suspend_resume(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp,bool suspend)822 void i40iw_qp_suspend_resume(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp, bool suspend)
823 {
824 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
825 struct i40iw_cqp_request *cqp_request;
826 struct i40iw_sc_cqp *cqp = dev->cqp;
827 struct cqp_commands_info *cqp_info;
828 enum i40iw_status_code status;
829
830 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
831 if (!cqp_request)
832 return;
833
834 cqp_info = &cqp_request->info;
835 cqp_info->cqp_cmd = (suspend) ? OP_SUSPEND : OP_RESUME;
836 cqp_info->in.u.suspend_resume.cqp = cqp;
837 cqp_info->in.u.suspend_resume.qp = qp;
838 cqp_info->in.u.suspend_resume.scratch = (uintptr_t)cqp_request;
839 status = i40iw_handle_cqp_op(iwdev, cqp_request);
840 if (status)
841 i40iw_pr_err("CQP-OP QP Suspend/Resume fail");
842 }
843
844 /**
845 * i40iw_term_modify_qp - modify qp for term message
846 * @qp: hardware control qp
847 * @next_state: qp's next state
848 * @term: terminate code
849 * @term_len: length
850 */
i40iw_term_modify_qp(struct i40iw_sc_qp * qp,u8 next_state,u8 term,u8 term_len)851 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
852 {
853 struct i40iw_qp *iwqp;
854
855 iwqp = (struct i40iw_qp *)qp->back_qp;
856 i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
857 };
858
859 /**
860 * i40iw_terminate_done - after terminate is completed
861 * @qp: hardware control qp
862 * @timeout_occurred: indicates if terminate timer expired
863 */
i40iw_terminate_done(struct i40iw_sc_qp * qp,int timeout_occurred)864 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
865 {
866 struct i40iw_qp *iwqp;
867 u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
868 u8 hte = 0;
869 bool first_time;
870 unsigned long flags;
871
872 iwqp = (struct i40iw_qp *)qp->back_qp;
873 spin_lock_irqsave(&iwqp->lock, flags);
874 if (iwqp->hte_added) {
875 iwqp->hte_added = 0;
876 hte = 1;
877 }
878 first_time = !(qp->term_flags & I40IW_TERM_DONE);
879 qp->term_flags |= I40IW_TERM_DONE;
880 spin_unlock_irqrestore(&iwqp->lock, flags);
881 if (first_time) {
882 if (!timeout_occurred)
883 i40iw_terminate_del_timer(qp);
884 else
885 next_iwarp_state = I40IW_QP_STATE_CLOSING;
886
887 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
888 i40iw_cm_disconn(iwqp);
889 }
890 }
891
892 /**
893 * i40iw_terminate_timeout - timeout happened
894 * @t: points to iwarp qp
895 */
i40iw_terminate_timeout(struct timer_list * t)896 static void i40iw_terminate_timeout(struct timer_list *t)
897 {
898 struct i40iw_qp *iwqp = from_timer(iwqp, t, terminate_timer);
899 struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
900
901 i40iw_terminate_done(qp, 1);
902 i40iw_qp_rem_ref(&iwqp->ibqp);
903 }
904
905 /**
906 * i40iw_terminate_start_timer - start terminate timeout
907 * @qp: hardware control qp
908 */
i40iw_terminate_start_timer(struct i40iw_sc_qp * qp)909 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
910 {
911 struct i40iw_qp *iwqp;
912
913 iwqp = (struct i40iw_qp *)qp->back_qp;
914 i40iw_qp_add_ref(&iwqp->ibqp);
915 timer_setup(&iwqp->terminate_timer, i40iw_terminate_timeout, 0);
916 iwqp->terminate_timer.expires = jiffies + HZ;
917 add_timer(&iwqp->terminate_timer);
918 }
919
920 /**
921 * i40iw_terminate_del_timer - delete terminate timeout
922 * @qp: hardware control qp
923 */
i40iw_terminate_del_timer(struct i40iw_sc_qp * qp)924 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
925 {
926 struct i40iw_qp *iwqp;
927
928 iwqp = (struct i40iw_qp *)qp->back_qp;
929 if (del_timer(&iwqp->terminate_timer))
930 i40iw_qp_rem_ref(&iwqp->ibqp);
931 }
932
933 /**
934 * i40iw_cqp_generic_worker - generic worker for cqp
935 * @work: work pointer
936 */
i40iw_cqp_generic_worker(struct work_struct * work)937 static void i40iw_cqp_generic_worker(struct work_struct *work)
938 {
939 struct i40iw_virtchnl_work_info *work_info =
940 &((struct virtchnl_work *)work)->work_info;
941
942 if (work_info->worker_vf_dev)
943 work_info->callback_fcn(work_info->worker_vf_dev);
944 }
945
946 /**
947 * i40iw_cqp_spawn_worker - spawn worket thread
948 * @dev: device struct pointer
949 * @work_info: work request info
950 * @iw_vf_idx: virtual function index
951 */
i40iw_cqp_spawn_worker(struct i40iw_sc_dev * dev,struct i40iw_virtchnl_work_info * work_info,u32 iw_vf_idx)952 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
953 struct i40iw_virtchnl_work_info *work_info,
954 u32 iw_vf_idx)
955 {
956 struct virtchnl_work *work;
957 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
958
959 work = &iwdev->virtchnl_w[iw_vf_idx];
960 memcpy(&work->work_info, work_info, sizeof(*work_info));
961 INIT_WORK(&work->work, i40iw_cqp_generic_worker);
962 queue_work(iwdev->virtchnl_wq, &work->work);
963 }
964
965 /**
966 * i40iw_cqp_manage_hmc_fcn_worker -
967 * @work: work pointer for hmc info
968 */
i40iw_cqp_manage_hmc_fcn_worker(struct work_struct * work)969 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
970 {
971 struct i40iw_cqp_request *cqp_request =
972 ((struct virtchnl_work *)work)->cqp_request;
973 struct i40iw_ccq_cqe_info ccq_cqe_info;
974 struct i40iw_hmc_fcn_info *hmcfcninfo =
975 &cqp_request->info.in.u.manage_hmc_pm.info;
976 struct i40iw_device *iwdev =
977 (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
978
979 ccq_cqe_info.cqp = NULL;
980 ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
981 ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
982 ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
983 ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
984 ccq_cqe_info.scratch = 0;
985 ccq_cqe_info.error = cqp_request->compl_info.error;
986 hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
987 hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
988 i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
989 }
990
991 /**
992 * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
993 * @cqp_request: cqp request info struct for hmc fun
994 * @unused: unused param of callback
995 */
i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request * cqp_request,u32 unused)996 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
997 u32 unused)
998 {
999 struct virtchnl_work *work;
1000 struct i40iw_hmc_fcn_info *hmcfcninfo =
1001 &cqp_request->info.in.u.manage_hmc_pm.info;
1002 struct i40iw_device *iwdev =
1003 (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
1004 back_dev;
1005
1006 if (hmcfcninfo && hmcfcninfo->callback_fcn) {
1007 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
1008 atomic_inc(&cqp_request->refcount);
1009 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
1010 work->cqp_request = cqp_request;
1011 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
1012 queue_work(iwdev->virtchnl_wq, &work->work);
1013 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
1014 } else {
1015 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
1016 }
1017 }
1018
1019 /**
1020 * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
1021 * @dev: hardware control device structure
1022 * @hmcfcninfo: info for hmc
1023 */
i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev * dev,struct i40iw_hmc_fcn_info * hmcfcninfo)1024 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
1025 struct i40iw_hmc_fcn_info *hmcfcninfo)
1026 {
1027 enum i40iw_status_code status;
1028 struct i40iw_cqp_request *cqp_request;
1029 struct cqp_commands_info *cqp_info;
1030 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1031
1032 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
1033 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
1034 if (!cqp_request)
1035 return I40IW_ERR_NO_MEMORY;
1036 cqp_info = &cqp_request->info;
1037 cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
1038 cqp_request->param = hmcfcninfo;
1039 memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
1040 sizeof(*hmcfcninfo));
1041 cqp_info->in.u.manage_hmc_pm.dev = dev;
1042 cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
1043 cqp_info->post_sq = 1;
1044 cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
1045 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1046 if (status)
1047 i40iw_pr_err("CQP-OP Manage HMC fail");
1048 return status;
1049 }
1050
1051 /**
1052 * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
1053 * @dev: function device struct
1054 * @values_mem: buffer for fpm
1055 * @hmc_fn_id: function id for fpm
1056 */
i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * values_mem,u8 hmc_fn_id)1057 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
1058 struct i40iw_dma_mem *values_mem,
1059 u8 hmc_fn_id)
1060 {
1061 enum i40iw_status_code status;
1062 struct i40iw_cqp_request *cqp_request;
1063 struct cqp_commands_info *cqp_info;
1064 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1065
1066 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1067 if (!cqp_request)
1068 return I40IW_ERR_NO_MEMORY;
1069 cqp_info = &cqp_request->info;
1070 cqp_request->param = NULL;
1071 cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
1072 cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
1073 cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
1074 cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
1075 cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
1076 cqp_info->post_sq = 1;
1077 cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
1078 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1079 if (status)
1080 i40iw_pr_err("CQP-OP Query FPM fail");
1081 return status;
1082 }
1083
1084 /**
1085 * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
1086 * @dev: hardware control device structure
1087 * @values_mem: buffer with fpm values
1088 * @hmc_fn_id: function id for fpm
1089 */
i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * values_mem,u8 hmc_fn_id)1090 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
1091 struct i40iw_dma_mem *values_mem,
1092 u8 hmc_fn_id)
1093 {
1094 enum i40iw_status_code status;
1095 struct i40iw_cqp_request *cqp_request;
1096 struct cqp_commands_info *cqp_info;
1097 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1098
1099 cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1100 if (!cqp_request)
1101 return I40IW_ERR_NO_MEMORY;
1102 cqp_info = &cqp_request->info;
1103 cqp_request->param = NULL;
1104 cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
1105 cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
1106 cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
1107 cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
1108 cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
1109 cqp_info->post_sq = 1;
1110 cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
1111 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1112 if (status)
1113 i40iw_pr_err("CQP-OP Commit FPM fail");
1114 return status;
1115 }
1116
1117 /**
1118 * i40iw_vf_wait_vchnl_resp - wait for channel msg
1119 * @dev: function's device struct
1120 */
i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev * dev)1121 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
1122 {
1123 struct i40iw_device *iwdev = dev->back_dev;
1124 int timeout_ret;
1125
1126 i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1127 __func__, __LINE__, dev, iwdev);
1128
1129 atomic_set(&iwdev->vchnl_msgs, 2);
1130 timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1131 (atomic_read(&iwdev->vchnl_msgs) == 1),
1132 I40IW_VCHNL_EVENT_TIMEOUT);
1133 atomic_dec(&iwdev->vchnl_msgs);
1134 if (!timeout_ret) {
1135 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1136 atomic_set(&iwdev->vchnl_msgs, 0);
1137 dev->vchnl_up = false;
1138 return I40IW_ERR_TIMEOUT;
1139 }
1140 wake_up(&dev->vf_reqs);
1141 return 0;
1142 }
1143
1144 /**
1145 * i40iw_cqp_cq_create_cmd - create a cq for the cqp
1146 * @dev: device pointer
1147 * @cq: pointer to created cq
1148 */
i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_cq * cq)1149 enum i40iw_status_code i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev *dev,
1150 struct i40iw_sc_cq *cq)
1151 {
1152 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1153 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1154 struct i40iw_cqp_request *cqp_request;
1155 struct cqp_commands_info *cqp_info;
1156 enum i40iw_status_code status;
1157
1158 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1159 if (!cqp_request)
1160 return I40IW_ERR_NO_MEMORY;
1161
1162 cqp_info = &cqp_request->info;
1163 cqp_info->cqp_cmd = OP_CQ_CREATE;
1164 cqp_info->post_sq = 1;
1165 cqp_info->in.u.cq_create.cq = cq;
1166 cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1167 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1168 if (status)
1169 i40iw_pr_err("CQP-OP Create QP fail");
1170
1171 return status;
1172 }
1173
1174 /**
1175 * i40iw_cqp_qp_create_cmd - create a qp for the cqp
1176 * @dev: device pointer
1177 * @qp: pointer to created qp
1178 */
i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1179 enum i40iw_status_code i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev *dev,
1180 struct i40iw_sc_qp *qp)
1181 {
1182 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1183 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1184 struct i40iw_cqp_request *cqp_request;
1185 struct cqp_commands_info *cqp_info;
1186 struct i40iw_create_qp_info *qp_info;
1187 enum i40iw_status_code status;
1188
1189 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1190 if (!cqp_request)
1191 return I40IW_ERR_NO_MEMORY;
1192
1193 cqp_info = &cqp_request->info;
1194 qp_info = &cqp_request->info.in.u.qp_create.info;
1195
1196 memset(qp_info, 0, sizeof(*qp_info));
1197
1198 qp_info->cq_num_valid = true;
1199 qp_info->next_iwarp_state = I40IW_QP_STATE_RTS;
1200
1201 cqp_info->cqp_cmd = OP_QP_CREATE;
1202 cqp_info->post_sq = 1;
1203 cqp_info->in.u.qp_create.qp = qp;
1204 cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
1205 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1206 if (status)
1207 i40iw_pr_err("CQP-OP QP create fail");
1208 return status;
1209 }
1210
1211 /**
1212 * i40iw_cqp_cq_destroy_cmd - destroy the cqp cq
1213 * @dev: device pointer
1214 * @cq: pointer to cq
1215 */
i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_cq * cq)1216 void i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_cq *cq)
1217 {
1218 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1219
1220 i40iw_cq_wq_destroy(iwdev, cq);
1221 }
1222
1223 /**
1224 * i40iw_cqp_qp_destroy_cmd - destroy the cqp
1225 * @dev: device pointer
1226 * @qp: pointer to qp
1227 */
i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1228 void i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1229 {
1230 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1231 struct i40iw_cqp *iwcqp = &iwdev->cqp;
1232 struct i40iw_cqp_request *cqp_request;
1233 struct cqp_commands_info *cqp_info;
1234 enum i40iw_status_code status;
1235
1236 cqp_request = i40iw_get_cqp_request(iwcqp, true);
1237 if (!cqp_request)
1238 return;
1239
1240 cqp_info = &cqp_request->info;
1241 memset(cqp_info, 0, sizeof(*cqp_info));
1242
1243 cqp_info->cqp_cmd = OP_QP_DESTROY;
1244 cqp_info->post_sq = 1;
1245 cqp_info->in.u.qp_destroy.qp = qp;
1246 cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
1247 cqp_info->in.u.qp_destroy.remove_hash_idx = true;
1248 status = i40iw_handle_cqp_op(iwdev, cqp_request);
1249 if (status)
1250 i40iw_pr_err("CQP QP_DESTROY fail");
1251 }
1252
1253
1254 /**
1255 * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1256 * @dev: hardware control device structure
1257 * @qp: hardware control qp
1258 */
i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev * dev,struct i40iw_sc_qp * qp)1259 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1260 {
1261 struct i40iw_gen_ae_info info;
1262 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1263
1264 i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1265 info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1266 info.ae_source = I40IW_AE_SOURCE_RQ;
1267 i40iw_gen_ae(iwdev, qp, &info, false);
1268 }
1269
1270 /**
1271 * i40iw_init_hash_desc - initialize hash for crc calculation
1272 * @desc: cryption type
1273 */
i40iw_init_hash_desc(struct shash_desc ** desc)1274 enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1275 {
1276 struct crypto_shash *tfm;
1277 struct shash_desc *tdesc;
1278
1279 tfm = crypto_alloc_shash("crc32c", 0, 0);
1280 if (IS_ERR(tfm))
1281 return I40IW_ERR_MPA_CRC;
1282
1283 tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1284 GFP_KERNEL);
1285 if (!tdesc) {
1286 crypto_free_shash(tfm);
1287 return I40IW_ERR_MPA_CRC;
1288 }
1289 tdesc->tfm = tfm;
1290 *desc = tdesc;
1291
1292 return 0;
1293 }
1294
1295 /**
1296 * i40iw_free_hash_desc - free hash desc
1297 * @desc: to be freed
1298 */
i40iw_free_hash_desc(struct shash_desc * desc)1299 void i40iw_free_hash_desc(struct shash_desc *desc)
1300 {
1301 if (desc) {
1302 crypto_free_shash(desc->tfm);
1303 kfree(desc);
1304 }
1305 }
1306
1307 /**
1308 * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1309 * @dev: hardware control device structure
1310 * @mem: buffer ptr for fpm to be allocated
1311 * @return: memory allocation status
1312 */
i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev * dev,struct i40iw_dma_mem * mem)1313 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1314 struct i40iw_dma_mem *mem)
1315 {
1316 enum i40iw_status_code status;
1317 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1318
1319 status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1320 I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1321 return status;
1322 }
1323
1324 /**
1325 * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1326 * @desc: desc for hash
1327 * @addr: address of buffer for crc
1328 * @length: length of buffer
1329 * @value: value to be compared
1330 */
i40iw_ieq_check_mpacrc(struct shash_desc * desc,void * addr,u32 length,u32 value)1331 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1332 void *addr,
1333 u32 length,
1334 u32 value)
1335 {
1336 u32 crc = 0;
1337 int ret;
1338 enum i40iw_status_code ret_code = 0;
1339
1340 crypto_shash_init(desc);
1341 ret = crypto_shash_update(desc, addr, length);
1342 if (!ret)
1343 crypto_shash_final(desc, (u8 *)&crc);
1344 if (crc != value) {
1345 i40iw_pr_err("mpa crc check fail\n");
1346 ret_code = I40IW_ERR_MPA_CRC;
1347 }
1348 return ret_code;
1349 }
1350
1351 /**
1352 * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1353 * @dev: hardware control device structure
1354 * @buf: receive puda buffer on exception q
1355 */
i40iw_ieq_get_qp(struct i40iw_sc_dev * dev,struct i40iw_puda_buf * buf)1356 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1357 struct i40iw_puda_buf *buf)
1358 {
1359 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1360 struct i40iw_qp *iwqp;
1361 struct i40iw_cm_node *cm_node;
1362 u32 loc_addr[4], rem_addr[4];
1363 u16 loc_port, rem_port;
1364 struct ipv6hdr *ip6h;
1365 struct iphdr *iph = (struct iphdr *)buf->iph;
1366 struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1367
1368 if (iph->version == 4) {
1369 memset(loc_addr, 0, sizeof(loc_addr));
1370 loc_addr[0] = ntohl(iph->daddr);
1371 memset(rem_addr, 0, sizeof(rem_addr));
1372 rem_addr[0] = ntohl(iph->saddr);
1373 } else {
1374 ip6h = (struct ipv6hdr *)buf->iph;
1375 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1376 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1377 }
1378 loc_port = ntohs(tcph->dest);
1379 rem_port = ntohs(tcph->source);
1380
1381 cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1382 loc_addr, false, true);
1383 if (!cm_node)
1384 return NULL;
1385 iwqp = cm_node->iwqp;
1386 return &iwqp->sc_qp;
1387 }
1388
1389 /**
1390 * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1391 * @buf: puda to update
1392 * @length: length of buffer
1393 * @seqnum: seq number for tcp
1394 */
i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf * buf,u16 length,u32 seqnum)1395 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1396 {
1397 struct tcphdr *tcph;
1398 struct iphdr *iph;
1399 u16 iphlen;
1400 u16 packetsize;
1401 u8 *addr = (u8 *)buf->mem.va;
1402
1403 iphlen = (buf->ipv4) ? 20 : 40;
1404 iph = (struct iphdr *)(addr + buf->maclen);
1405 tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1406 packetsize = length + buf->tcphlen + iphlen;
1407
1408 iph->tot_len = htons(packetsize);
1409 tcph->seq = htonl(seqnum);
1410 }
1411
1412 /**
1413 * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1414 * @info: to get information
1415 * @buf: puda buffer
1416 */
i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info * info,struct i40iw_puda_buf * buf)1417 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1418 struct i40iw_puda_buf *buf)
1419 {
1420 struct iphdr *iph;
1421 struct ipv6hdr *ip6h;
1422 struct tcphdr *tcph;
1423 u16 iphlen;
1424 u16 pkt_len;
1425 u8 *mem = (u8 *)buf->mem.va;
1426 struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1427
1428 if (ethh->h_proto == htons(0x8100)) {
1429 info->vlan_valid = true;
1430 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1431 }
1432 buf->maclen = (info->vlan_valid) ? 18 : 14;
1433 iphlen = (info->l3proto) ? 40 : 20;
1434 buf->ipv4 = (info->l3proto) ? false : true;
1435 buf->iph = mem + buf->maclen;
1436 iph = (struct iphdr *)buf->iph;
1437
1438 buf->tcph = buf->iph + iphlen;
1439 tcph = (struct tcphdr *)buf->tcph;
1440
1441 if (buf->ipv4) {
1442 pkt_len = ntohs(iph->tot_len);
1443 } else {
1444 ip6h = (struct ipv6hdr *)buf->iph;
1445 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1446 }
1447
1448 buf->totallen = pkt_len + buf->maclen;
1449
1450 if (info->payload_len < buf->totallen) {
1451 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1452 info->payload_len, buf->totallen);
1453 return I40IW_ERR_INVALID_SIZE;
1454 }
1455
1456 buf->tcphlen = (tcph->doff) << 2;
1457 buf->datalen = pkt_len - iphlen - buf->tcphlen;
1458 buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1459 buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1460 buf->seqnum = ntohl(tcph->seq);
1461 return 0;
1462 }
1463
1464 /**
1465 * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1466 * @t: Timer context containing pointer to the vsi structure
1467 */
i40iw_hw_stats_timeout(struct timer_list * t)1468 static void i40iw_hw_stats_timeout(struct timer_list *t)
1469 {
1470 struct i40iw_vsi_pestat *pf_devstat = from_timer(pf_devstat, t,
1471 stats_timer);
1472 struct i40iw_sc_vsi *sc_vsi = pf_devstat->vsi;
1473 struct i40iw_sc_dev *pf_dev = sc_vsi->dev;
1474 struct i40iw_vsi_pestat *vf_devstat = NULL;
1475 u16 iw_vf_idx;
1476 unsigned long flags;
1477
1478 /*PF*/
1479 i40iw_hw_stats_read_all(pf_devstat, &pf_devstat->hw_stats);
1480
1481 for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1482 spin_lock_irqsave(&pf_devstat->lock, flags);
1483 if (pf_dev->vf_dev[iw_vf_idx]) {
1484 if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1485 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->pestat;
1486 i40iw_hw_stats_read_all(vf_devstat, &vf_devstat->hw_stats);
1487 }
1488 }
1489 spin_unlock_irqrestore(&pf_devstat->lock, flags);
1490 }
1491
1492 mod_timer(&pf_devstat->stats_timer,
1493 jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1494 }
1495
1496 /**
1497 * i40iw_hw_stats_start_timer - Start periodic stats timer
1498 * @vsi: pointer to the vsi structure
1499 */
i40iw_hw_stats_start_timer(struct i40iw_sc_vsi * vsi)1500 void i40iw_hw_stats_start_timer(struct i40iw_sc_vsi *vsi)
1501 {
1502 struct i40iw_vsi_pestat *devstat = vsi->pestat;
1503
1504 timer_setup(&devstat->stats_timer, i40iw_hw_stats_timeout, 0);
1505 mod_timer(&devstat->stats_timer,
1506 jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1507 }
1508
1509 /**
1510 * i40iw_hw_stats_stop_timer - Delete periodic stats timer
1511 * @vsi: pointer to the vsi structure
1512 */
i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi * vsi)1513 void i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi *vsi)
1514 {
1515 struct i40iw_vsi_pestat *devstat = vsi->pestat;
1516
1517 del_timer_sync(&devstat->stats_timer);
1518 }
1519