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Merge tag 'mac80211-next-for-davem-2018-03-29' of git://git.kernel.org/pub/scm/linux...
[mirror_ubuntu-eoan-kernel.git] / drivers / net / ethernet / ibm / ehea / ehea_main.c
1 /*
2 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
3 *
4 * eHEA ethernet device driver for IBM eServer System p
5 *
6 * (C) Copyright IBM Corp. 2006
7 *
8 * Authors:
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
12 *
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
31 #include <linux/device.h>
32 #include <linux/in.h>
33 #include <linux/ip.h>
34 #include <linux/tcp.h>
35 #include <linux/udp.h>
36 #include <linux/if.h>
37 #include <linux/list.h>
38 #include <linux/slab.h>
39 #include <linux/if_ether.h>
40 #include <linux/notifier.h>
41 #include <linux/reboot.h>
42 #include <linux/memory.h>
43 #include <asm/kexec.h>
44 #include <linux/mutex.h>
45 #include <linux/prefetch.h>
46
47 #include <net/ip.h>
48
49 #include "ehea.h"
50 #include "ehea_qmr.h"
51 #include "ehea_phyp.h"
52
53
54 MODULE_LICENSE("GPL");
55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
56 MODULE_DESCRIPTION("IBM eServer HEA Driver");
57 MODULE_VERSION(DRV_VERSION);
58
59
60 static int msg_level = -1;
61 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
62 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
63 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
64 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
65 static int use_mcs = 1;
66 static int prop_carrier_state;
67
68 module_param(msg_level, int, 0);
69 module_param(rq1_entries, int, 0);
70 module_param(rq2_entries, int, 0);
71 module_param(rq3_entries, int, 0);
72 module_param(sq_entries, int, 0);
73 module_param(prop_carrier_state, int, 0);
74 module_param(use_mcs, int, 0);
75
76 MODULE_PARM_DESC(msg_level, "msg_level");
77 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
78 "port to stack. 1:yes, 0:no. Default = 0 ");
79 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
80 "[2^x - 1], x = [7..14]. Default = "
81 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
82 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
83 "[2^x - 1], x = [7..14]. Default = "
84 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
85 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
86 "[2^x - 1], x = [7..14]. Default = "
87 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
88 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
89 "[2^x - 1], x = [7..14]. Default = "
90 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
91 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
92 "Default = 1");
93
94 static int port_name_cnt;
95 static LIST_HEAD(adapter_list);
96 static unsigned long ehea_driver_flags;
97 static DEFINE_MUTEX(dlpar_mem_lock);
98 static struct ehea_fw_handle_array ehea_fw_handles;
99 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
100
101
102 static int ehea_probe_adapter(struct platform_device *dev);
103
104 static int ehea_remove(struct platform_device *dev);
105
106 static const struct of_device_id ehea_module_device_table[] = {
107 {
108 .name = "lhea",
109 .compatible = "IBM,lhea",
110 },
111 {
112 .type = "network",
113 .compatible = "IBM,lhea-ethernet",
114 },
115 {},
116 };
117 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
118
119 static const struct of_device_id ehea_device_table[] = {
120 {
121 .name = "lhea",
122 .compatible = "IBM,lhea",
123 },
124 {},
125 };
126
127 static struct platform_driver ehea_driver = {
128 .driver = {
129 .name = "ehea",
130 .owner = THIS_MODULE,
131 .of_match_table = ehea_device_table,
132 },
133 .probe = ehea_probe_adapter,
134 .remove = ehea_remove,
135 };
136
137 void ehea_dump(void *adr, int len, char *msg)
138 {
139 int x;
140 unsigned char *deb = adr;
141 for (x = 0; x < len; x += 16) {
142 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
143 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
144 deb += 16;
145 }
146 }
147
148 static void ehea_schedule_port_reset(struct ehea_port *port)
149 {
150 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
151 schedule_work(&port->reset_task);
152 }
153
154 static void ehea_update_firmware_handles(void)
155 {
156 struct ehea_fw_handle_entry *arr = NULL;
157 struct ehea_adapter *adapter;
158 int num_adapters = 0;
159 int num_ports = 0;
160 int num_portres = 0;
161 int i = 0;
162 int num_fw_handles, k, l;
163
164 /* Determine number of handles */
165 mutex_lock(&ehea_fw_handles.lock);
166
167 list_for_each_entry(adapter, &adapter_list, list) {
168 num_adapters++;
169
170 for (k = 0; k < EHEA_MAX_PORTS; k++) {
171 struct ehea_port *port = adapter->port[k];
172
173 if (!port || (port->state != EHEA_PORT_UP))
174 continue;
175
176 num_ports++;
177 num_portres += port->num_def_qps;
178 }
179 }
180
181 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
182 num_ports * EHEA_NUM_PORT_FW_HANDLES +
183 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
184
185 if (num_fw_handles) {
186 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
187 if (!arr)
188 goto out; /* Keep the existing array */
189 } else
190 goto out_update;
191
192 list_for_each_entry(adapter, &adapter_list, list) {
193 if (num_adapters == 0)
194 break;
195
196 for (k = 0; k < EHEA_MAX_PORTS; k++) {
197 struct ehea_port *port = adapter->port[k];
198
199 if (!port || (port->state != EHEA_PORT_UP) ||
200 (num_ports == 0))
201 continue;
202
203 for (l = 0; l < port->num_def_qps; l++) {
204 struct ehea_port_res *pr = &port->port_res[l];
205
206 arr[i].adh = adapter->handle;
207 arr[i++].fwh = pr->qp->fw_handle;
208 arr[i].adh = adapter->handle;
209 arr[i++].fwh = pr->send_cq->fw_handle;
210 arr[i].adh = adapter->handle;
211 arr[i++].fwh = pr->recv_cq->fw_handle;
212 arr[i].adh = adapter->handle;
213 arr[i++].fwh = pr->eq->fw_handle;
214 arr[i].adh = adapter->handle;
215 arr[i++].fwh = pr->send_mr.handle;
216 arr[i].adh = adapter->handle;
217 arr[i++].fwh = pr->recv_mr.handle;
218 }
219 arr[i].adh = adapter->handle;
220 arr[i++].fwh = port->qp_eq->fw_handle;
221 num_ports--;
222 }
223
224 arr[i].adh = adapter->handle;
225 arr[i++].fwh = adapter->neq->fw_handle;
226
227 if (adapter->mr.handle) {
228 arr[i].adh = adapter->handle;
229 arr[i++].fwh = adapter->mr.handle;
230 }
231 num_adapters--;
232 }
233
234 out_update:
235 kfree(ehea_fw_handles.arr);
236 ehea_fw_handles.arr = arr;
237 ehea_fw_handles.num_entries = i;
238 out:
239 mutex_unlock(&ehea_fw_handles.lock);
240 }
241
242 static void ehea_update_bcmc_registrations(void)
243 {
244 unsigned long flags;
245 struct ehea_bcmc_reg_entry *arr = NULL;
246 struct ehea_adapter *adapter;
247 struct ehea_mc_list *mc_entry;
248 int num_registrations = 0;
249 int i = 0;
250 int k;
251
252 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
253
254 /* Determine number of registrations */
255 list_for_each_entry(adapter, &adapter_list, list)
256 for (k = 0; k < EHEA_MAX_PORTS; k++) {
257 struct ehea_port *port = adapter->port[k];
258
259 if (!port || (port->state != EHEA_PORT_UP))
260 continue;
261
262 num_registrations += 2; /* Broadcast registrations */
263
264 list_for_each_entry(mc_entry, &port->mc_list->list,list)
265 num_registrations += 2;
266 }
267
268 if (num_registrations) {
269 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
270 if (!arr)
271 goto out; /* Keep the existing array */
272 } else
273 goto out_update;
274
275 list_for_each_entry(adapter, &adapter_list, list) {
276 for (k = 0; k < EHEA_MAX_PORTS; k++) {
277 struct ehea_port *port = adapter->port[k];
278
279 if (!port || (port->state != EHEA_PORT_UP))
280 continue;
281
282 if (num_registrations == 0)
283 goto out_update;
284
285 arr[i].adh = adapter->handle;
286 arr[i].port_id = port->logical_port_id;
287 arr[i].reg_type = EHEA_BCMC_BROADCAST |
288 EHEA_BCMC_UNTAGGED;
289 arr[i++].macaddr = port->mac_addr;
290
291 arr[i].adh = adapter->handle;
292 arr[i].port_id = port->logical_port_id;
293 arr[i].reg_type = EHEA_BCMC_BROADCAST |
294 EHEA_BCMC_VLANID_ALL;
295 arr[i++].macaddr = port->mac_addr;
296 num_registrations -= 2;
297
298 list_for_each_entry(mc_entry,
299 &port->mc_list->list, list) {
300 if (num_registrations == 0)
301 goto out_update;
302
303 arr[i].adh = adapter->handle;
304 arr[i].port_id = port->logical_port_id;
305 arr[i].reg_type = EHEA_BCMC_MULTICAST |
306 EHEA_BCMC_UNTAGGED;
307 if (mc_entry->macaddr == 0)
308 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
309 arr[i++].macaddr = mc_entry->macaddr;
310
311 arr[i].adh = adapter->handle;
312 arr[i].port_id = port->logical_port_id;
313 arr[i].reg_type = EHEA_BCMC_MULTICAST |
314 EHEA_BCMC_VLANID_ALL;
315 if (mc_entry->macaddr == 0)
316 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
317 arr[i++].macaddr = mc_entry->macaddr;
318 num_registrations -= 2;
319 }
320 }
321 }
322
323 out_update:
324 kfree(ehea_bcmc_regs.arr);
325 ehea_bcmc_regs.arr = arr;
326 ehea_bcmc_regs.num_entries = i;
327 out:
328 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
329 }
330
331 static void ehea_get_stats64(struct net_device *dev,
332 struct rtnl_link_stats64 *stats)
333 {
334 struct ehea_port *port = netdev_priv(dev);
335 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
336 int i;
337
338 for (i = 0; i < port->num_def_qps; i++) {
339 rx_packets += port->port_res[i].rx_packets;
340 rx_bytes += port->port_res[i].rx_bytes;
341 }
342
343 for (i = 0; i < port->num_def_qps; i++) {
344 tx_packets += port->port_res[i].tx_packets;
345 tx_bytes += port->port_res[i].tx_bytes;
346 }
347
348 stats->tx_packets = tx_packets;
349 stats->rx_bytes = rx_bytes;
350 stats->tx_bytes = tx_bytes;
351 stats->rx_packets = rx_packets;
352
353 stats->multicast = port->stats.multicast;
354 stats->rx_errors = port->stats.rx_errors;
355 }
356
357 static void ehea_update_stats(struct work_struct *work)
358 {
359 struct ehea_port *port =
360 container_of(work, struct ehea_port, stats_work.work);
361 struct net_device *dev = port->netdev;
362 struct rtnl_link_stats64 *stats = &port->stats;
363 struct hcp_ehea_port_cb2 *cb2;
364 u64 hret;
365
366 cb2 = (void *)get_zeroed_page(GFP_KERNEL);
367 if (!cb2) {
368 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
369 goto resched;
370 }
371
372 hret = ehea_h_query_ehea_port(port->adapter->handle,
373 port->logical_port_id,
374 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
375 if (hret != H_SUCCESS) {
376 netdev_err(dev, "query_ehea_port failed\n");
377 goto out_herr;
378 }
379
380 if (netif_msg_hw(port))
381 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
382
383 stats->multicast = cb2->rxmcp;
384 stats->rx_errors = cb2->rxuerr;
385
386 out_herr:
387 free_page((unsigned long)cb2);
388 resched:
389 schedule_delayed_work(&port->stats_work,
390 round_jiffies_relative(msecs_to_jiffies(1000)));
391 }
392
393 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
394 {
395 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
396 struct net_device *dev = pr->port->netdev;
397 int max_index_mask = pr->rq1_skba.len - 1;
398 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
399 int adder = 0;
400 int i;
401
402 pr->rq1_skba.os_skbs = 0;
403
404 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
405 if (nr_of_wqes > 0)
406 pr->rq1_skba.index = index;
407 pr->rq1_skba.os_skbs = fill_wqes;
408 return;
409 }
410
411 for (i = 0; i < fill_wqes; i++) {
412 if (!skb_arr_rq1[index]) {
413 skb_arr_rq1[index] = netdev_alloc_skb(dev,
414 EHEA_L_PKT_SIZE);
415 if (!skb_arr_rq1[index]) {
416 pr->rq1_skba.os_skbs = fill_wqes - i;
417 break;
418 }
419 }
420 index--;
421 index &= max_index_mask;
422 adder++;
423 }
424
425 if (adder == 0)
426 return;
427
428 /* Ring doorbell */
429 ehea_update_rq1a(pr->qp, adder);
430 }
431
432 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
433 {
434 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
435 struct net_device *dev = pr->port->netdev;
436 int i;
437
438 if (nr_rq1a > pr->rq1_skba.len) {
439 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
440 return;
441 }
442
443 for (i = 0; i < nr_rq1a; i++) {
444 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
445 if (!skb_arr_rq1[i])
446 break;
447 }
448 /* Ring doorbell */
449 ehea_update_rq1a(pr->qp, i - 1);
450 }
451
452 static int ehea_refill_rq_def(struct ehea_port_res *pr,
453 struct ehea_q_skb_arr *q_skba, int rq_nr,
454 int num_wqes, int wqe_type, int packet_size)
455 {
456 struct net_device *dev = pr->port->netdev;
457 struct ehea_qp *qp = pr->qp;
458 struct sk_buff **skb_arr = q_skba->arr;
459 struct ehea_rwqe *rwqe;
460 int i, index, max_index_mask, fill_wqes;
461 int adder = 0;
462 int ret = 0;
463
464 fill_wqes = q_skba->os_skbs + num_wqes;
465 q_skba->os_skbs = 0;
466
467 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
468 q_skba->os_skbs = fill_wqes;
469 return ret;
470 }
471
472 index = q_skba->index;
473 max_index_mask = q_skba->len - 1;
474 for (i = 0; i < fill_wqes; i++) {
475 u64 tmp_addr;
476 struct sk_buff *skb;
477
478 skb = netdev_alloc_skb_ip_align(dev, packet_size);
479 if (!skb) {
480 q_skba->os_skbs = fill_wqes - i;
481 if (q_skba->os_skbs == q_skba->len - 2) {
482 netdev_info(pr->port->netdev,
483 "rq%i ran dry - no mem for skb\n",
484 rq_nr);
485 ret = -ENOMEM;
486 }
487 break;
488 }
489
490 skb_arr[index] = skb;
491 tmp_addr = ehea_map_vaddr(skb->data);
492 if (tmp_addr == -1) {
493 dev_consume_skb_any(skb);
494 q_skba->os_skbs = fill_wqes - i;
495 ret = 0;
496 break;
497 }
498
499 rwqe = ehea_get_next_rwqe(qp, rq_nr);
500 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
501 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
502 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
503 rwqe->sg_list[0].vaddr = tmp_addr;
504 rwqe->sg_list[0].len = packet_size;
505 rwqe->data_segments = 1;
506
507 index++;
508 index &= max_index_mask;
509 adder++;
510 }
511
512 q_skba->index = index;
513 if (adder == 0)
514 goto out;
515
516 /* Ring doorbell */
517 iosync();
518 if (rq_nr == 2)
519 ehea_update_rq2a(pr->qp, adder);
520 else
521 ehea_update_rq3a(pr->qp, adder);
522 out:
523 return ret;
524 }
525
526
527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
528 {
529 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
530 nr_of_wqes, EHEA_RWQE2_TYPE,
531 EHEA_RQ2_PKT_SIZE);
532 }
533
534
535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
536 {
537 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
538 nr_of_wqes, EHEA_RWQE3_TYPE,
539 EHEA_MAX_PACKET_SIZE);
540 }
541
542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
543 {
544 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
545 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
546 return 0;
547 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
548 (cqe->header_length == 0))
549 return 0;
550 return -EINVAL;
551 }
552
553 static inline void ehea_fill_skb(struct net_device *dev,
554 struct sk_buff *skb, struct ehea_cqe *cqe,
555 struct ehea_port_res *pr)
556 {
557 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
558
559 skb_put(skb, length);
560 skb->protocol = eth_type_trans(skb, dev);
561
562 /* The packet was not an IPV4 packet so a complemented checksum was
563 calculated. The value is found in the Internet Checksum field. */
564 if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
565 skb->ip_summed = CHECKSUM_COMPLETE;
566 skb->csum = csum_unfold(~cqe->inet_checksum_value);
567 } else
568 skb->ip_summed = CHECKSUM_UNNECESSARY;
569
570 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
571 }
572
573 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
574 int arr_len,
575 struct ehea_cqe *cqe)
576 {
577 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
578 struct sk_buff *skb;
579 void *pref;
580 int x;
581
582 x = skb_index + 1;
583 x &= (arr_len - 1);
584
585 pref = skb_array[x];
586 if (pref) {
587 prefetchw(pref);
588 prefetchw(pref + EHEA_CACHE_LINE);
589
590 pref = (skb_array[x]->data);
591 prefetch(pref);
592 prefetch(pref + EHEA_CACHE_LINE);
593 prefetch(pref + EHEA_CACHE_LINE * 2);
594 prefetch(pref + EHEA_CACHE_LINE * 3);
595 }
596
597 skb = skb_array[skb_index];
598 skb_array[skb_index] = NULL;
599 return skb;
600 }
601
602 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
603 int arr_len, int wqe_index)
604 {
605 struct sk_buff *skb;
606 void *pref;
607 int x;
608
609 x = wqe_index + 1;
610 x &= (arr_len - 1);
611
612 pref = skb_array[x];
613 if (pref) {
614 prefetchw(pref);
615 prefetchw(pref + EHEA_CACHE_LINE);
616
617 pref = (skb_array[x]->data);
618 prefetchw(pref);
619 prefetchw(pref + EHEA_CACHE_LINE);
620 }
621
622 skb = skb_array[wqe_index];
623 skb_array[wqe_index] = NULL;
624 return skb;
625 }
626
627 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
628 struct ehea_cqe *cqe, int *processed_rq2,
629 int *processed_rq3)
630 {
631 struct sk_buff *skb;
632
633 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
634 pr->p_stats.err_tcp_cksum++;
635 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
636 pr->p_stats.err_ip_cksum++;
637 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
638 pr->p_stats.err_frame_crc++;
639
640 if (rq == 2) {
641 *processed_rq2 += 1;
642 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
643 dev_kfree_skb(skb);
644 } else if (rq == 3) {
645 *processed_rq3 += 1;
646 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
647 dev_kfree_skb(skb);
648 }
649
650 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
651 if (netif_msg_rx_err(pr->port)) {
652 pr_err("Critical receive error for QP %d. Resetting port.\n",
653 pr->qp->init_attr.qp_nr);
654 ehea_dump(cqe, sizeof(*cqe), "CQE");
655 }
656 ehea_schedule_port_reset(pr->port);
657 return 1;
658 }
659
660 return 0;
661 }
662
663 static int ehea_proc_rwqes(struct net_device *dev,
664 struct ehea_port_res *pr,
665 int budget)
666 {
667 struct ehea_port *port = pr->port;
668 struct ehea_qp *qp = pr->qp;
669 struct ehea_cqe *cqe;
670 struct sk_buff *skb;
671 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
672 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
673 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
674 int skb_arr_rq1_len = pr->rq1_skba.len;
675 int skb_arr_rq2_len = pr->rq2_skba.len;
676 int skb_arr_rq3_len = pr->rq3_skba.len;
677 int processed, processed_rq1, processed_rq2, processed_rq3;
678 u64 processed_bytes = 0;
679 int wqe_index, last_wqe_index, rq, port_reset;
680
681 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
682 last_wqe_index = 0;
683
684 cqe = ehea_poll_rq1(qp, &wqe_index);
685 while ((processed < budget) && cqe) {
686 ehea_inc_rq1(qp);
687 processed_rq1++;
688 processed++;
689 if (netif_msg_rx_status(port))
690 ehea_dump(cqe, sizeof(*cqe), "CQE");
691
692 last_wqe_index = wqe_index;
693 rmb();
694 if (!ehea_check_cqe(cqe, &rq)) {
695 if (rq == 1) {
696 /* LL RQ1 */
697 skb = get_skb_by_index_ll(skb_arr_rq1,
698 skb_arr_rq1_len,
699 wqe_index);
700 if (unlikely(!skb)) {
701 netif_info(port, rx_err, dev,
702 "LL rq1: skb=NULL\n");
703
704 skb = netdev_alloc_skb(dev,
705 EHEA_L_PKT_SIZE);
706 if (!skb)
707 break;
708 }
709 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
710 cqe->num_bytes_transfered - 4);
711 ehea_fill_skb(dev, skb, cqe, pr);
712 } else if (rq == 2) {
713 /* RQ2 */
714 skb = get_skb_by_index(skb_arr_rq2,
715 skb_arr_rq2_len, cqe);
716 if (unlikely(!skb)) {
717 netif_err(port, rx_err, dev,
718 "rq2: skb=NULL\n");
719 break;
720 }
721 ehea_fill_skb(dev, skb, cqe, pr);
722 processed_rq2++;
723 } else {
724 /* RQ3 */
725 skb = get_skb_by_index(skb_arr_rq3,
726 skb_arr_rq3_len, cqe);
727 if (unlikely(!skb)) {
728 netif_err(port, rx_err, dev,
729 "rq3: skb=NULL\n");
730 break;
731 }
732 ehea_fill_skb(dev, skb, cqe, pr);
733 processed_rq3++;
734 }
735
736 processed_bytes += skb->len;
737
738 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
739 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
740 cqe->vlan_tag);
741
742 napi_gro_receive(&pr->napi, skb);
743 } else {
744 pr->p_stats.poll_receive_errors++;
745 port_reset = ehea_treat_poll_error(pr, rq, cqe,
746 &processed_rq2,
747 &processed_rq3);
748 if (port_reset)
749 break;
750 }
751 cqe = ehea_poll_rq1(qp, &wqe_index);
752 }
753
754 pr->rx_packets += processed;
755 pr->rx_bytes += processed_bytes;
756
757 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
758 ehea_refill_rq2(pr, processed_rq2);
759 ehea_refill_rq3(pr, processed_rq3);
760
761 return processed;
762 }
763
764 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
765
766 static void reset_sq_restart_flag(struct ehea_port *port)
767 {
768 int i;
769
770 for (i = 0; i < port->num_def_qps; i++) {
771 struct ehea_port_res *pr = &port->port_res[i];
772 pr->sq_restart_flag = 0;
773 }
774 wake_up(&port->restart_wq);
775 }
776
777 static void check_sqs(struct ehea_port *port)
778 {
779 struct ehea_swqe *swqe;
780 int swqe_index;
781 int i, k;
782
783 for (i = 0; i < port->num_def_qps; i++) {
784 struct ehea_port_res *pr = &port->port_res[i];
785 int ret;
786 k = 0;
787 swqe = ehea_get_swqe(pr->qp, &swqe_index);
788 memset(swqe, 0, SWQE_HEADER_SIZE);
789 atomic_dec(&pr->swqe_avail);
790
791 swqe->tx_control |= EHEA_SWQE_PURGE;
792 swqe->wr_id = SWQE_RESTART_CHECK;
793 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
794 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
795 swqe->immediate_data_length = 80;
796
797 ehea_post_swqe(pr->qp, swqe);
798
799 ret = wait_event_timeout(port->restart_wq,
800 pr->sq_restart_flag == 0,
801 msecs_to_jiffies(100));
802
803 if (!ret) {
804 pr_err("HW/SW queues out of sync\n");
805 ehea_schedule_port_reset(pr->port);
806 return;
807 }
808 }
809 }
810
811
812 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
813 {
814 struct sk_buff *skb;
815 struct ehea_cq *send_cq = pr->send_cq;
816 struct ehea_cqe *cqe;
817 int quota = my_quota;
818 int cqe_counter = 0;
819 int swqe_av = 0;
820 int index;
821 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
822 pr - &pr->port->port_res[0]);
823
824 cqe = ehea_poll_cq(send_cq);
825 while (cqe && (quota > 0)) {
826 ehea_inc_cq(send_cq);
827
828 cqe_counter++;
829 rmb();
830
831 if (cqe->wr_id == SWQE_RESTART_CHECK) {
832 pr->sq_restart_flag = 1;
833 swqe_av++;
834 break;
835 }
836
837 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
838 pr_err("Bad send completion status=0x%04X\n",
839 cqe->status);
840
841 if (netif_msg_tx_err(pr->port))
842 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
843
844 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
845 pr_err("Resetting port\n");
846 ehea_schedule_port_reset(pr->port);
847 break;
848 }
849 }
850
851 if (netif_msg_tx_done(pr->port))
852 ehea_dump(cqe, sizeof(*cqe), "CQE");
853
854 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
855 == EHEA_SWQE2_TYPE)) {
856
857 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
858 skb = pr->sq_skba.arr[index];
859 dev_consume_skb_any(skb);
860 pr->sq_skba.arr[index] = NULL;
861 }
862
863 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
864 quota--;
865
866 cqe = ehea_poll_cq(send_cq);
867 }
868
869 ehea_update_feca(send_cq, cqe_counter);
870 atomic_add(swqe_av, &pr->swqe_avail);
871
872 if (unlikely(netif_tx_queue_stopped(txq) &&
873 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
874 __netif_tx_lock(txq, smp_processor_id());
875 if (netif_tx_queue_stopped(txq) &&
876 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
877 netif_tx_wake_queue(txq);
878 __netif_tx_unlock(txq);
879 }
880
881 wake_up(&pr->port->swqe_avail_wq);
882
883 return cqe;
884 }
885
886 #define EHEA_POLL_MAX_CQES 65535
887
888 static int ehea_poll(struct napi_struct *napi, int budget)
889 {
890 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
891 napi);
892 struct net_device *dev = pr->port->netdev;
893 struct ehea_cqe *cqe;
894 struct ehea_cqe *cqe_skb = NULL;
895 int wqe_index;
896 int rx = 0;
897
898 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
899 rx += ehea_proc_rwqes(dev, pr, budget - rx);
900
901 while (rx != budget) {
902 napi_complete(napi);
903 ehea_reset_cq_ep(pr->recv_cq);
904 ehea_reset_cq_ep(pr->send_cq);
905 ehea_reset_cq_n1(pr->recv_cq);
906 ehea_reset_cq_n1(pr->send_cq);
907 rmb();
908 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
909 cqe_skb = ehea_poll_cq(pr->send_cq);
910
911 if (!cqe && !cqe_skb)
912 return rx;
913
914 if (!napi_reschedule(napi))
915 return rx;
916
917 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
918 rx += ehea_proc_rwqes(dev, pr, budget - rx);
919 }
920
921 return rx;
922 }
923
924 #ifdef CONFIG_NET_POLL_CONTROLLER
925 static void ehea_netpoll(struct net_device *dev)
926 {
927 struct ehea_port *port = netdev_priv(dev);
928 int i;
929
930 for (i = 0; i < port->num_def_qps; i++)
931 napi_schedule(&port->port_res[i].napi);
932 }
933 #endif
934
935 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
936 {
937 struct ehea_port_res *pr = param;
938
939 napi_schedule(&pr->napi);
940
941 return IRQ_HANDLED;
942 }
943
944 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
945 {
946 struct ehea_port *port = param;
947 struct ehea_eqe *eqe;
948 struct ehea_qp *qp;
949 u32 qp_token;
950 u64 resource_type, aer, aerr;
951 int reset_port = 0;
952
953 eqe = ehea_poll_eq(port->qp_eq);
954
955 while (eqe) {
956 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
957 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
958 eqe->entry, qp_token);
959
960 qp = port->port_res[qp_token].qp;
961
962 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
963 &aer, &aerr);
964
965 if (resource_type == EHEA_AER_RESTYPE_QP) {
966 if ((aer & EHEA_AER_RESET_MASK) ||
967 (aerr & EHEA_AERR_RESET_MASK))
968 reset_port = 1;
969 } else
970 reset_port = 1; /* Reset in case of CQ or EQ error */
971
972 eqe = ehea_poll_eq(port->qp_eq);
973 }
974
975 if (reset_port) {
976 pr_err("Resetting port\n");
977 ehea_schedule_port_reset(port);
978 }
979
980 return IRQ_HANDLED;
981 }
982
983 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
984 int logical_port)
985 {
986 int i;
987
988 for (i = 0; i < EHEA_MAX_PORTS; i++)
989 if (adapter->port[i])
990 if (adapter->port[i]->logical_port_id == logical_port)
991 return adapter->port[i];
992 return NULL;
993 }
994
995 int ehea_sense_port_attr(struct ehea_port *port)
996 {
997 int ret;
998 u64 hret;
999 struct hcp_ehea_port_cb0 *cb0;
1000
1001 /* may be called via ehea_neq_tasklet() */
1002 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1003 if (!cb0) {
1004 pr_err("no mem for cb0\n");
1005 ret = -ENOMEM;
1006 goto out;
1007 }
1008
1009 hret = ehea_h_query_ehea_port(port->adapter->handle,
1010 port->logical_port_id, H_PORT_CB0,
1011 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1012 cb0);
1013 if (hret != H_SUCCESS) {
1014 ret = -EIO;
1015 goto out_free;
1016 }
1017
1018 /* MAC address */
1019 port->mac_addr = cb0->port_mac_addr << 16;
1020
1021 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1022 ret = -EADDRNOTAVAIL;
1023 goto out_free;
1024 }
1025
1026 /* Port speed */
1027 switch (cb0->port_speed) {
1028 case H_SPEED_10M_H:
1029 port->port_speed = EHEA_SPEED_10M;
1030 port->full_duplex = 0;
1031 break;
1032 case H_SPEED_10M_F:
1033 port->port_speed = EHEA_SPEED_10M;
1034 port->full_duplex = 1;
1035 break;
1036 case H_SPEED_100M_H:
1037 port->port_speed = EHEA_SPEED_100M;
1038 port->full_duplex = 0;
1039 break;
1040 case H_SPEED_100M_F:
1041 port->port_speed = EHEA_SPEED_100M;
1042 port->full_duplex = 1;
1043 break;
1044 case H_SPEED_1G_F:
1045 port->port_speed = EHEA_SPEED_1G;
1046 port->full_duplex = 1;
1047 break;
1048 case H_SPEED_10G_F:
1049 port->port_speed = EHEA_SPEED_10G;
1050 port->full_duplex = 1;
1051 break;
1052 default:
1053 port->port_speed = 0;
1054 port->full_duplex = 0;
1055 break;
1056 }
1057
1058 port->autoneg = 1;
1059 port->num_mcs = cb0->num_default_qps;
1060
1061 /* Number of default QPs */
1062 if (use_mcs)
1063 port->num_def_qps = cb0->num_default_qps;
1064 else
1065 port->num_def_qps = 1;
1066
1067 if (!port->num_def_qps) {
1068 ret = -EINVAL;
1069 goto out_free;
1070 }
1071
1072 ret = 0;
1073 out_free:
1074 if (ret || netif_msg_probe(port))
1075 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1076 free_page((unsigned long)cb0);
1077 out:
1078 return ret;
1079 }
1080
1081 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1082 {
1083 struct hcp_ehea_port_cb4 *cb4;
1084 u64 hret;
1085 int ret = 0;
1086
1087 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1088 if (!cb4) {
1089 pr_err("no mem for cb4\n");
1090 ret = -ENOMEM;
1091 goto out;
1092 }
1093
1094 cb4->port_speed = port_speed;
1095
1096 netif_carrier_off(port->netdev);
1097
1098 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1099 port->logical_port_id,
1100 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1101 if (hret == H_SUCCESS) {
1102 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1103
1104 hret = ehea_h_query_ehea_port(port->adapter->handle,
1105 port->logical_port_id,
1106 H_PORT_CB4, H_PORT_CB4_SPEED,
1107 cb4);
1108 if (hret == H_SUCCESS) {
1109 switch (cb4->port_speed) {
1110 case H_SPEED_10M_H:
1111 port->port_speed = EHEA_SPEED_10M;
1112 port->full_duplex = 0;
1113 break;
1114 case H_SPEED_10M_F:
1115 port->port_speed = EHEA_SPEED_10M;
1116 port->full_duplex = 1;
1117 break;
1118 case H_SPEED_100M_H:
1119 port->port_speed = EHEA_SPEED_100M;
1120 port->full_duplex = 0;
1121 break;
1122 case H_SPEED_100M_F:
1123 port->port_speed = EHEA_SPEED_100M;
1124 port->full_duplex = 1;
1125 break;
1126 case H_SPEED_1G_F:
1127 port->port_speed = EHEA_SPEED_1G;
1128 port->full_duplex = 1;
1129 break;
1130 case H_SPEED_10G_F:
1131 port->port_speed = EHEA_SPEED_10G;
1132 port->full_duplex = 1;
1133 break;
1134 default:
1135 port->port_speed = 0;
1136 port->full_duplex = 0;
1137 break;
1138 }
1139 } else {
1140 pr_err("Failed sensing port speed\n");
1141 ret = -EIO;
1142 }
1143 } else {
1144 if (hret == H_AUTHORITY) {
1145 pr_info("Hypervisor denied setting port speed\n");
1146 ret = -EPERM;
1147 } else {
1148 ret = -EIO;
1149 pr_err("Failed setting port speed\n");
1150 }
1151 }
1152 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1153 netif_carrier_on(port->netdev);
1154
1155 free_page((unsigned long)cb4);
1156 out:
1157 return ret;
1158 }
1159
1160 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1161 {
1162 int ret;
1163 u8 ec;
1164 u8 portnum;
1165 struct ehea_port *port;
1166 struct net_device *dev;
1167
1168 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1169 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1170 port = ehea_get_port(adapter, portnum);
1171 if (!port) {
1172 netdev_err(NULL, "unknown portnum %x\n", portnum);
1173 return;
1174 }
1175 dev = port->netdev;
1176
1177 switch (ec) {
1178 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1179
1180 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1181 if (!netif_carrier_ok(dev)) {
1182 ret = ehea_sense_port_attr(port);
1183 if (ret) {
1184 netdev_err(dev, "failed resensing port attributes\n");
1185 break;
1186 }
1187
1188 netif_info(port, link, dev,
1189 "Logical port up: %dMbps %s Duplex\n",
1190 port->port_speed,
1191 port->full_duplex == 1 ?
1192 "Full" : "Half");
1193
1194 netif_carrier_on(dev);
1195 netif_wake_queue(dev);
1196 }
1197 } else
1198 if (netif_carrier_ok(dev)) {
1199 netif_info(port, link, dev,
1200 "Logical port down\n");
1201 netif_carrier_off(dev);
1202 netif_tx_disable(dev);
1203 }
1204
1205 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1206 port->phy_link = EHEA_PHY_LINK_UP;
1207 netif_info(port, link, dev,
1208 "Physical port up\n");
1209 if (prop_carrier_state)
1210 netif_carrier_on(dev);
1211 } else {
1212 port->phy_link = EHEA_PHY_LINK_DOWN;
1213 netif_info(port, link, dev,
1214 "Physical port down\n");
1215 if (prop_carrier_state)
1216 netif_carrier_off(dev);
1217 }
1218
1219 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1220 netdev_info(dev,
1221 "External switch port is primary port\n");
1222 else
1223 netdev_info(dev,
1224 "External switch port is backup port\n");
1225
1226 break;
1227 case EHEA_EC_ADAPTER_MALFUNC:
1228 netdev_err(dev, "Adapter malfunction\n");
1229 break;
1230 case EHEA_EC_PORT_MALFUNC:
1231 netdev_info(dev, "Port malfunction\n");
1232 netif_carrier_off(dev);
1233 netif_tx_disable(dev);
1234 break;
1235 default:
1236 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1237 break;
1238 }
1239 }
1240
1241 static void ehea_neq_tasklet(unsigned long data)
1242 {
1243 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1244 struct ehea_eqe *eqe;
1245 u64 event_mask;
1246
1247 eqe = ehea_poll_eq(adapter->neq);
1248 pr_debug("eqe=%p\n", eqe);
1249
1250 while (eqe) {
1251 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1252 ehea_parse_eqe(adapter, eqe->entry);
1253 eqe = ehea_poll_eq(adapter->neq);
1254 pr_debug("next eqe=%p\n", eqe);
1255 }
1256
1257 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1258 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1259 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1260
1261 ehea_h_reset_events(adapter->handle,
1262 adapter->neq->fw_handle, event_mask);
1263 }
1264
1265 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1266 {
1267 struct ehea_adapter *adapter = param;
1268 tasklet_hi_schedule(&adapter->neq_tasklet);
1269 return IRQ_HANDLED;
1270 }
1271
1272
1273 static int ehea_fill_port_res(struct ehea_port_res *pr)
1274 {
1275 int ret;
1276 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1277
1278 ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1279
1280 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1281
1282 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1283
1284 return ret;
1285 }
1286
1287 static int ehea_reg_interrupts(struct net_device *dev)
1288 {
1289 struct ehea_port *port = netdev_priv(dev);
1290 struct ehea_port_res *pr;
1291 int i, ret;
1292
1293
1294 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1295 dev->name);
1296
1297 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1298 ehea_qp_aff_irq_handler,
1299 0, port->int_aff_name, port);
1300 if (ret) {
1301 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1302 port->qp_eq->attr.ist1);
1303 goto out_free_qpeq;
1304 }
1305
1306 netif_info(port, ifup, dev,
1307 "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1308 port->qp_eq->attr.ist1);
1309
1310
1311 for (i = 0; i < port->num_def_qps; i++) {
1312 pr = &port->port_res[i];
1313 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1314 "%s-queue%d", dev->name, i);
1315 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1316 ehea_recv_irq_handler,
1317 0, pr->int_send_name, pr);
1318 if (ret) {
1319 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1320 i, pr->eq->attr.ist1);
1321 goto out_free_req;
1322 }
1323 netif_info(port, ifup, dev,
1324 "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1325 pr->eq->attr.ist1, i);
1326 }
1327 out:
1328 return ret;
1329
1330
1331 out_free_req:
1332 while (--i >= 0) {
1333 u32 ist = port->port_res[i].eq->attr.ist1;
1334 ibmebus_free_irq(ist, &port->port_res[i]);
1335 }
1336
1337 out_free_qpeq:
1338 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1339 i = port->num_def_qps;
1340
1341 goto out;
1342
1343 }
1344
1345 static void ehea_free_interrupts(struct net_device *dev)
1346 {
1347 struct ehea_port *port = netdev_priv(dev);
1348 struct ehea_port_res *pr;
1349 int i;
1350
1351 /* send */
1352
1353 for (i = 0; i < port->num_def_qps; i++) {
1354 pr = &port->port_res[i];
1355 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1356 netif_info(port, intr, dev,
1357 "free send irq for res %d with handle 0x%X\n",
1358 i, pr->eq->attr.ist1);
1359 }
1360
1361 /* associated events */
1362 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1363 netif_info(port, intr, dev,
1364 "associated event interrupt for handle 0x%X freed\n",
1365 port->qp_eq->attr.ist1);
1366 }
1367
1368 static int ehea_configure_port(struct ehea_port *port)
1369 {
1370 int ret, i;
1371 u64 hret, mask;
1372 struct hcp_ehea_port_cb0 *cb0;
1373
1374 ret = -ENOMEM;
1375 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1376 if (!cb0)
1377 goto out;
1378
1379 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1380 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1381 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1382 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1383 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1384 PXLY_RC_VLAN_FILTER)
1385 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1386
1387 for (i = 0; i < port->num_mcs; i++)
1388 if (use_mcs)
1389 cb0->default_qpn_arr[i] =
1390 port->port_res[i].qp->init_attr.qp_nr;
1391 else
1392 cb0->default_qpn_arr[i] =
1393 port->port_res[0].qp->init_attr.qp_nr;
1394
1395 if (netif_msg_ifup(port))
1396 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1397
1398 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1399 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1400
1401 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1402 port->logical_port_id,
1403 H_PORT_CB0, mask, cb0);
1404 ret = -EIO;
1405 if (hret != H_SUCCESS)
1406 goto out_free;
1407
1408 ret = 0;
1409
1410 out_free:
1411 free_page((unsigned long)cb0);
1412 out:
1413 return ret;
1414 }
1415
1416 static int ehea_gen_smrs(struct ehea_port_res *pr)
1417 {
1418 int ret;
1419 struct ehea_adapter *adapter = pr->port->adapter;
1420
1421 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1422 if (ret)
1423 goto out;
1424
1425 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1426 if (ret)
1427 goto out_free;
1428
1429 return 0;
1430
1431 out_free:
1432 ehea_rem_mr(&pr->send_mr);
1433 out:
1434 pr_err("Generating SMRS failed\n");
1435 return -EIO;
1436 }
1437
1438 static int ehea_rem_smrs(struct ehea_port_res *pr)
1439 {
1440 if ((ehea_rem_mr(&pr->send_mr)) ||
1441 (ehea_rem_mr(&pr->recv_mr)))
1442 return -EIO;
1443 else
1444 return 0;
1445 }
1446
1447 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1448 {
1449 int arr_size = sizeof(void *) * max_q_entries;
1450
1451 q_skba->arr = vzalloc(arr_size);
1452 if (!q_skba->arr)
1453 return -ENOMEM;
1454
1455 q_skba->len = max_q_entries;
1456 q_skba->index = 0;
1457 q_skba->os_skbs = 0;
1458
1459 return 0;
1460 }
1461
1462 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1463 struct port_res_cfg *pr_cfg, int queue_token)
1464 {
1465 struct ehea_adapter *adapter = port->adapter;
1466 enum ehea_eq_type eq_type = EHEA_EQ;
1467 struct ehea_qp_init_attr *init_attr = NULL;
1468 int ret = -EIO;
1469 u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1470
1471 tx_bytes = pr->tx_bytes;
1472 tx_packets = pr->tx_packets;
1473 rx_bytes = pr->rx_bytes;
1474 rx_packets = pr->rx_packets;
1475
1476 memset(pr, 0, sizeof(struct ehea_port_res));
1477
1478 pr->tx_bytes = rx_bytes;
1479 pr->tx_packets = tx_packets;
1480 pr->rx_bytes = rx_bytes;
1481 pr->rx_packets = rx_packets;
1482
1483 pr->port = port;
1484
1485 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1486 if (!pr->eq) {
1487 pr_err("create_eq failed (eq)\n");
1488 goto out_free;
1489 }
1490
1491 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1492 pr->eq->fw_handle,
1493 port->logical_port_id);
1494 if (!pr->recv_cq) {
1495 pr_err("create_cq failed (cq_recv)\n");
1496 goto out_free;
1497 }
1498
1499 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1500 pr->eq->fw_handle,
1501 port->logical_port_id);
1502 if (!pr->send_cq) {
1503 pr_err("create_cq failed (cq_send)\n");
1504 goto out_free;
1505 }
1506
1507 if (netif_msg_ifup(port))
1508 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1509 pr->send_cq->attr.act_nr_of_cqes,
1510 pr->recv_cq->attr.act_nr_of_cqes);
1511
1512 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1513 if (!init_attr) {
1514 ret = -ENOMEM;
1515 pr_err("no mem for ehea_qp_init_attr\n");
1516 goto out_free;
1517 }
1518
1519 init_attr->low_lat_rq1 = 1;
1520 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1521 init_attr->rq_count = 3;
1522 init_attr->qp_token = queue_token;
1523 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1524 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1525 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1526 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1527 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1528 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1529 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1530 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1531 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1532 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1533 init_attr->port_nr = port->logical_port_id;
1534 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1535 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1536 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1537
1538 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1539 if (!pr->qp) {
1540 pr_err("create_qp failed\n");
1541 ret = -EIO;
1542 goto out_free;
1543 }
1544
1545 if (netif_msg_ifup(port))
1546 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1547 init_attr->qp_nr,
1548 init_attr->act_nr_send_wqes,
1549 init_attr->act_nr_rwqes_rq1,
1550 init_attr->act_nr_rwqes_rq2,
1551 init_attr->act_nr_rwqes_rq3);
1552
1553 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1554
1555 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1556 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1557 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1558 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1559 if (ret)
1560 goto out_free;
1561
1562 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1563 if (ehea_gen_smrs(pr) != 0) {
1564 ret = -EIO;
1565 goto out_free;
1566 }
1567
1568 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1569
1570 kfree(init_attr);
1571
1572 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1573
1574 ret = 0;
1575 goto out;
1576
1577 out_free:
1578 kfree(init_attr);
1579 vfree(pr->sq_skba.arr);
1580 vfree(pr->rq1_skba.arr);
1581 vfree(pr->rq2_skba.arr);
1582 vfree(pr->rq3_skba.arr);
1583 ehea_destroy_qp(pr->qp);
1584 ehea_destroy_cq(pr->send_cq);
1585 ehea_destroy_cq(pr->recv_cq);
1586 ehea_destroy_eq(pr->eq);
1587 out:
1588 return ret;
1589 }
1590
1591 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1592 {
1593 int ret, i;
1594
1595 if (pr->qp)
1596 netif_napi_del(&pr->napi);
1597
1598 ret = ehea_destroy_qp(pr->qp);
1599
1600 if (!ret) {
1601 ehea_destroy_cq(pr->send_cq);
1602 ehea_destroy_cq(pr->recv_cq);
1603 ehea_destroy_eq(pr->eq);
1604
1605 for (i = 0; i < pr->rq1_skba.len; i++)
1606 if (pr->rq1_skba.arr[i])
1607 dev_kfree_skb(pr->rq1_skba.arr[i]);
1608
1609 for (i = 0; i < pr->rq2_skba.len; i++)
1610 if (pr->rq2_skba.arr[i])
1611 dev_kfree_skb(pr->rq2_skba.arr[i]);
1612
1613 for (i = 0; i < pr->rq3_skba.len; i++)
1614 if (pr->rq3_skba.arr[i])
1615 dev_kfree_skb(pr->rq3_skba.arr[i]);
1616
1617 for (i = 0; i < pr->sq_skba.len; i++)
1618 if (pr->sq_skba.arr[i])
1619 dev_kfree_skb(pr->sq_skba.arr[i]);
1620
1621 vfree(pr->rq1_skba.arr);
1622 vfree(pr->rq2_skba.arr);
1623 vfree(pr->rq3_skba.arr);
1624 vfree(pr->sq_skba.arr);
1625 ret = ehea_rem_smrs(pr);
1626 }
1627 return ret;
1628 }
1629
1630 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1631 u32 lkey)
1632 {
1633 int skb_data_size = skb_headlen(skb);
1634 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1635 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1636 unsigned int immediate_len = SWQE2_MAX_IMM;
1637
1638 swqe->descriptors = 0;
1639
1640 if (skb_is_gso(skb)) {
1641 swqe->tx_control |= EHEA_SWQE_TSO;
1642 swqe->mss = skb_shinfo(skb)->gso_size;
1643 /*
1644 * For TSO packets we only copy the headers into the
1645 * immediate area.
1646 */
1647 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1648 }
1649
1650 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1651 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1652 swqe->immediate_data_length = immediate_len;
1653
1654 if (skb_data_size > immediate_len) {
1655 sg1entry->l_key = lkey;
1656 sg1entry->len = skb_data_size - immediate_len;
1657 sg1entry->vaddr =
1658 ehea_map_vaddr(skb->data + immediate_len);
1659 swqe->descriptors++;
1660 }
1661 } else {
1662 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1663 swqe->immediate_data_length = skb_data_size;
1664 }
1665 }
1666
1667 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1668 struct ehea_swqe *swqe, u32 lkey)
1669 {
1670 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1671 skb_frag_t *frag;
1672 int nfrags, sg1entry_contains_frag_data, i;
1673
1674 nfrags = skb_shinfo(skb)->nr_frags;
1675 sg1entry = &swqe->u.immdata_desc.sg_entry;
1676 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1677 sg1entry_contains_frag_data = 0;
1678
1679 write_swqe2_immediate(skb, swqe, lkey);
1680
1681 /* write descriptors */
1682 if (nfrags > 0) {
1683 if (swqe->descriptors == 0) {
1684 /* sg1entry not yet used */
1685 frag = &skb_shinfo(skb)->frags[0];
1686
1687 /* copy sg1entry data */
1688 sg1entry->l_key = lkey;
1689 sg1entry->len = skb_frag_size(frag);
1690 sg1entry->vaddr =
1691 ehea_map_vaddr(skb_frag_address(frag));
1692 swqe->descriptors++;
1693 sg1entry_contains_frag_data = 1;
1694 }
1695
1696 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1697
1698 frag = &skb_shinfo(skb)->frags[i];
1699 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1700
1701 sgentry->l_key = lkey;
1702 sgentry->len = skb_frag_size(frag);
1703 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1704 swqe->descriptors++;
1705 }
1706 }
1707 }
1708
1709 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1710 {
1711 int ret = 0;
1712 u64 hret;
1713 u8 reg_type;
1714
1715 /* De/Register untagged packets */
1716 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1717 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1718 port->logical_port_id,
1719 reg_type, port->mac_addr, 0, hcallid);
1720 if (hret != H_SUCCESS) {
1721 pr_err("%sregistering bc address failed (tagged)\n",
1722 hcallid == H_REG_BCMC ? "" : "de");
1723 ret = -EIO;
1724 goto out_herr;
1725 }
1726
1727 /* De/Register VLAN packets */
1728 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1729 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1730 port->logical_port_id,
1731 reg_type, port->mac_addr, 0, hcallid);
1732 if (hret != H_SUCCESS) {
1733 pr_err("%sregistering bc address failed (vlan)\n",
1734 hcallid == H_REG_BCMC ? "" : "de");
1735 ret = -EIO;
1736 }
1737 out_herr:
1738 return ret;
1739 }
1740
1741 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1742 {
1743 struct ehea_port *port = netdev_priv(dev);
1744 struct sockaddr *mac_addr = sa;
1745 struct hcp_ehea_port_cb0 *cb0;
1746 int ret;
1747 u64 hret;
1748
1749 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1750 ret = -EADDRNOTAVAIL;
1751 goto out;
1752 }
1753
1754 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1755 if (!cb0) {
1756 pr_err("no mem for cb0\n");
1757 ret = -ENOMEM;
1758 goto out;
1759 }
1760
1761 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1762
1763 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1764
1765 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1766 port->logical_port_id, H_PORT_CB0,
1767 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1768 if (hret != H_SUCCESS) {
1769 ret = -EIO;
1770 goto out_free;
1771 }
1772
1773 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1774
1775 /* Deregister old MAC in pHYP */
1776 if (port->state == EHEA_PORT_UP) {
1777 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1778 if (ret)
1779 goto out_upregs;
1780 }
1781
1782 port->mac_addr = cb0->port_mac_addr << 16;
1783
1784 /* Register new MAC in pHYP */
1785 if (port->state == EHEA_PORT_UP) {
1786 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1787 if (ret)
1788 goto out_upregs;
1789 }
1790
1791 ret = 0;
1792
1793 out_upregs:
1794 ehea_update_bcmc_registrations();
1795 out_free:
1796 free_page((unsigned long)cb0);
1797 out:
1798 return ret;
1799 }
1800
1801 static void ehea_promiscuous_error(u64 hret, int enable)
1802 {
1803 if (hret == H_AUTHORITY)
1804 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1805 enable == 1 ? "en" : "dis");
1806 else
1807 pr_err("failed %sabling promiscuous mode\n",
1808 enable == 1 ? "en" : "dis");
1809 }
1810
1811 static void ehea_promiscuous(struct net_device *dev, int enable)
1812 {
1813 struct ehea_port *port = netdev_priv(dev);
1814 struct hcp_ehea_port_cb7 *cb7;
1815 u64 hret;
1816
1817 if (enable == port->promisc)
1818 return;
1819
1820 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1821 if (!cb7) {
1822 pr_err("no mem for cb7\n");
1823 goto out;
1824 }
1825
1826 /* Modify Pxs_DUCQPN in CB7 */
1827 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1828
1829 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1830 port->logical_port_id,
1831 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1832 if (hret) {
1833 ehea_promiscuous_error(hret, enable);
1834 goto out;
1835 }
1836
1837 port->promisc = enable;
1838 out:
1839 free_page((unsigned long)cb7);
1840 }
1841
1842 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1843 u32 hcallid)
1844 {
1845 u64 hret;
1846 u8 reg_type;
1847
1848 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1849 if (mc_mac_addr == 0)
1850 reg_type |= EHEA_BCMC_SCOPE_ALL;
1851
1852 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1853 port->logical_port_id,
1854 reg_type, mc_mac_addr, 0, hcallid);
1855 if (hret)
1856 goto out;
1857
1858 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1859 if (mc_mac_addr == 0)
1860 reg_type |= EHEA_BCMC_SCOPE_ALL;
1861
1862 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1863 port->logical_port_id,
1864 reg_type, mc_mac_addr, 0, hcallid);
1865 out:
1866 return hret;
1867 }
1868
1869 static int ehea_drop_multicast_list(struct net_device *dev)
1870 {
1871 struct ehea_port *port = netdev_priv(dev);
1872 struct ehea_mc_list *mc_entry = port->mc_list;
1873 struct list_head *pos;
1874 struct list_head *temp;
1875 int ret = 0;
1876 u64 hret;
1877
1878 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1879 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1880
1881 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1882 H_DEREG_BCMC);
1883 if (hret) {
1884 pr_err("failed deregistering mcast MAC\n");
1885 ret = -EIO;
1886 }
1887
1888 list_del(pos);
1889 kfree(mc_entry);
1890 }
1891 return ret;
1892 }
1893
1894 static void ehea_allmulti(struct net_device *dev, int enable)
1895 {
1896 struct ehea_port *port = netdev_priv(dev);
1897 u64 hret;
1898
1899 if (!port->allmulti) {
1900 if (enable) {
1901 /* Enable ALLMULTI */
1902 ehea_drop_multicast_list(dev);
1903 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1904 if (!hret)
1905 port->allmulti = 1;
1906 else
1907 netdev_err(dev,
1908 "failed enabling IFF_ALLMULTI\n");
1909 }
1910 } else {
1911 if (!enable) {
1912 /* Disable ALLMULTI */
1913 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1914 if (!hret)
1915 port->allmulti = 0;
1916 else
1917 netdev_err(dev,
1918 "failed disabling IFF_ALLMULTI\n");
1919 }
1920 }
1921 }
1922
1923 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1924 {
1925 struct ehea_mc_list *ehea_mcl_entry;
1926 u64 hret;
1927
1928 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1929 if (!ehea_mcl_entry)
1930 return;
1931
1932 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1933
1934 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1935
1936 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1937 H_REG_BCMC);
1938 if (!hret)
1939 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1940 else {
1941 pr_err("failed registering mcast MAC\n");
1942 kfree(ehea_mcl_entry);
1943 }
1944 }
1945
1946 static void ehea_set_multicast_list(struct net_device *dev)
1947 {
1948 struct ehea_port *port = netdev_priv(dev);
1949 struct netdev_hw_addr *ha;
1950 int ret;
1951
1952 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1953
1954 if (dev->flags & IFF_ALLMULTI) {
1955 ehea_allmulti(dev, 1);
1956 goto out;
1957 }
1958 ehea_allmulti(dev, 0);
1959
1960 if (!netdev_mc_empty(dev)) {
1961 ret = ehea_drop_multicast_list(dev);
1962 if (ret) {
1963 /* Dropping the current multicast list failed.
1964 * Enabling ALL_MULTI is the best we can do.
1965 */
1966 ehea_allmulti(dev, 1);
1967 }
1968
1969 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1970 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1971 port->adapter->max_mc_mac);
1972 goto out;
1973 }
1974
1975 netdev_for_each_mc_addr(ha, dev)
1976 ehea_add_multicast_entry(port, ha->addr);
1977
1978 }
1979 out:
1980 ehea_update_bcmc_registrations();
1981 }
1982
1983 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1984 {
1985 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1986
1987 if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1988 return;
1989
1990 if (skb->ip_summed == CHECKSUM_PARTIAL)
1991 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1992
1993 swqe->ip_start = skb_network_offset(skb);
1994 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1995
1996 switch (ip_hdr(skb)->protocol) {
1997 case IPPROTO_UDP:
1998 if (skb->ip_summed == CHECKSUM_PARTIAL)
1999 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2000
2001 swqe->tcp_offset = swqe->ip_end + 1 +
2002 offsetof(struct udphdr, check);
2003 break;
2004
2005 case IPPROTO_TCP:
2006 if (skb->ip_summed == CHECKSUM_PARTIAL)
2007 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2008
2009 swqe->tcp_offset = swqe->ip_end + 1 +
2010 offsetof(struct tcphdr, check);
2011 break;
2012 }
2013 }
2014
2015 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2016 struct ehea_swqe *swqe, u32 lkey)
2017 {
2018 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2019
2020 xmit_common(skb, swqe);
2021
2022 write_swqe2_data(skb, dev, swqe, lkey);
2023 }
2024
2025 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2026 struct ehea_swqe *swqe)
2027 {
2028 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2029
2030 xmit_common(skb, swqe);
2031
2032 if (!skb->data_len)
2033 skb_copy_from_linear_data(skb, imm_data, skb->len);
2034 else
2035 skb_copy_bits(skb, 0, imm_data, skb->len);
2036
2037 swqe->immediate_data_length = skb->len;
2038 dev_consume_skb_any(skb);
2039 }
2040
2041 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2042 {
2043 struct ehea_port *port = netdev_priv(dev);
2044 struct ehea_swqe *swqe;
2045 u32 lkey;
2046 int swqe_index;
2047 struct ehea_port_res *pr;
2048 struct netdev_queue *txq;
2049
2050 pr = &port->port_res[skb_get_queue_mapping(skb)];
2051 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2052
2053 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2054 memset(swqe, 0, SWQE_HEADER_SIZE);
2055 atomic_dec(&pr->swqe_avail);
2056
2057 if (skb_vlan_tag_present(skb)) {
2058 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2059 swqe->vlan_tag = skb_vlan_tag_get(skb);
2060 }
2061
2062 pr->tx_packets++;
2063 pr->tx_bytes += skb->len;
2064
2065 if (skb->len <= SWQE3_MAX_IMM) {
2066 u32 sig_iv = port->sig_comp_iv;
2067 u32 swqe_num = pr->swqe_id_counter;
2068 ehea_xmit3(skb, dev, swqe);
2069 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2070 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2071 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2072 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2073 sig_iv);
2074 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2075 pr->swqe_ll_count = 0;
2076 } else
2077 pr->swqe_ll_count += 1;
2078 } else {
2079 swqe->wr_id =
2080 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2081 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2082 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2083 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2084 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2085
2086 pr->sq_skba.index++;
2087 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2088
2089 lkey = pr->send_mr.lkey;
2090 ehea_xmit2(skb, dev, swqe, lkey);
2091 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2092 }
2093 pr->swqe_id_counter += 1;
2094
2095 netif_info(port, tx_queued, dev,
2096 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2097 if (netif_msg_tx_queued(port))
2098 ehea_dump(swqe, 512, "swqe");
2099
2100 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2101 netif_tx_stop_queue(txq);
2102 swqe->tx_control |= EHEA_SWQE_PURGE;
2103 }
2104
2105 ehea_post_swqe(pr->qp, swqe);
2106
2107 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2108 pr->p_stats.queue_stopped++;
2109 netif_tx_stop_queue(txq);
2110 }
2111
2112 return NETDEV_TX_OK;
2113 }
2114
2115 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2116 {
2117 struct ehea_port *port = netdev_priv(dev);
2118 struct ehea_adapter *adapter = port->adapter;
2119 struct hcp_ehea_port_cb1 *cb1;
2120 int index;
2121 u64 hret;
2122 int err = 0;
2123
2124 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2125 if (!cb1) {
2126 pr_err("no mem for cb1\n");
2127 err = -ENOMEM;
2128 goto out;
2129 }
2130
2131 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2132 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2133 if (hret != H_SUCCESS) {
2134 pr_err("query_ehea_port failed\n");
2135 err = -EINVAL;
2136 goto out;
2137 }
2138
2139 index = (vid / 64);
2140 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2141
2142 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2143 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2144 if (hret != H_SUCCESS) {
2145 pr_err("modify_ehea_port failed\n");
2146 err = -EINVAL;
2147 }
2148 out:
2149 free_page((unsigned long)cb1);
2150 return err;
2151 }
2152
2153 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2154 {
2155 struct ehea_port *port = netdev_priv(dev);
2156 struct ehea_adapter *adapter = port->adapter;
2157 struct hcp_ehea_port_cb1 *cb1;
2158 int index;
2159 u64 hret;
2160 int err = 0;
2161
2162 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2163 if (!cb1) {
2164 pr_err("no mem for cb1\n");
2165 err = -ENOMEM;
2166 goto out;
2167 }
2168
2169 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2170 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2171 if (hret != H_SUCCESS) {
2172 pr_err("query_ehea_port failed\n");
2173 err = -EINVAL;
2174 goto out;
2175 }
2176
2177 index = (vid / 64);
2178 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2179
2180 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2181 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2182 if (hret != H_SUCCESS) {
2183 pr_err("modify_ehea_port failed\n");
2184 err = -EINVAL;
2185 }
2186 out:
2187 free_page((unsigned long)cb1);
2188 return err;
2189 }
2190
2191 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2192 {
2193 int ret = -EIO;
2194 u64 hret;
2195 u16 dummy16 = 0;
2196 u64 dummy64 = 0;
2197 struct hcp_modify_qp_cb0 *cb0;
2198
2199 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2200 if (!cb0) {
2201 ret = -ENOMEM;
2202 goto out;
2203 }
2204
2205 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2206 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2207 if (hret != H_SUCCESS) {
2208 pr_err("query_ehea_qp failed (1)\n");
2209 goto out;
2210 }
2211
2212 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2213 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2214 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2215 &dummy64, &dummy64, &dummy16, &dummy16);
2216 if (hret != H_SUCCESS) {
2217 pr_err("modify_ehea_qp failed (1)\n");
2218 goto out;
2219 }
2220
2221 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2222 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2223 if (hret != H_SUCCESS) {
2224 pr_err("query_ehea_qp failed (2)\n");
2225 goto out;
2226 }
2227
2228 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2229 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2230 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2231 &dummy64, &dummy64, &dummy16, &dummy16);
2232 if (hret != H_SUCCESS) {
2233 pr_err("modify_ehea_qp failed (2)\n");
2234 goto out;
2235 }
2236
2237 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2238 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2239 if (hret != H_SUCCESS) {
2240 pr_err("query_ehea_qp failed (3)\n");
2241 goto out;
2242 }
2243
2244 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2245 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2246 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2247 &dummy64, &dummy64, &dummy16, &dummy16);
2248 if (hret != H_SUCCESS) {
2249 pr_err("modify_ehea_qp failed (3)\n");
2250 goto out;
2251 }
2252
2253 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2254 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2255 if (hret != H_SUCCESS) {
2256 pr_err("query_ehea_qp failed (4)\n");
2257 goto out;
2258 }
2259
2260 ret = 0;
2261 out:
2262 free_page((unsigned long)cb0);
2263 return ret;
2264 }
2265
2266 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2267 {
2268 int ret, i;
2269 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2270 enum ehea_eq_type eq_type = EHEA_EQ;
2271
2272 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2273 EHEA_MAX_ENTRIES_EQ, 1);
2274 if (!port->qp_eq) {
2275 ret = -EINVAL;
2276 pr_err("ehea_create_eq failed (qp_eq)\n");
2277 goto out_kill_eq;
2278 }
2279
2280 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2281 pr_cfg.max_entries_scq = sq_entries * 2;
2282 pr_cfg.max_entries_sq = sq_entries;
2283 pr_cfg.max_entries_rq1 = rq1_entries;
2284 pr_cfg.max_entries_rq2 = rq2_entries;
2285 pr_cfg.max_entries_rq3 = rq3_entries;
2286
2287 pr_cfg_small_rx.max_entries_rcq = 1;
2288 pr_cfg_small_rx.max_entries_scq = sq_entries;
2289 pr_cfg_small_rx.max_entries_sq = sq_entries;
2290 pr_cfg_small_rx.max_entries_rq1 = 1;
2291 pr_cfg_small_rx.max_entries_rq2 = 1;
2292 pr_cfg_small_rx.max_entries_rq3 = 1;
2293
2294 for (i = 0; i < def_qps; i++) {
2295 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2296 if (ret)
2297 goto out_clean_pr;
2298 }
2299 for (i = def_qps; i < def_qps; i++) {
2300 ret = ehea_init_port_res(port, &port->port_res[i],
2301 &pr_cfg_small_rx, i);
2302 if (ret)
2303 goto out_clean_pr;
2304 }
2305
2306 return 0;
2307
2308 out_clean_pr:
2309 while (--i >= 0)
2310 ehea_clean_portres(port, &port->port_res[i]);
2311
2312 out_kill_eq:
2313 ehea_destroy_eq(port->qp_eq);
2314 return ret;
2315 }
2316
2317 static int ehea_clean_all_portres(struct ehea_port *port)
2318 {
2319 int ret = 0;
2320 int i;
2321
2322 for (i = 0; i < port->num_def_qps; i++)
2323 ret |= ehea_clean_portres(port, &port->port_res[i]);
2324
2325 ret |= ehea_destroy_eq(port->qp_eq);
2326
2327 return ret;
2328 }
2329
2330 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2331 {
2332 if (adapter->active_ports)
2333 return;
2334
2335 ehea_rem_mr(&adapter->mr);
2336 }
2337
2338 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2339 {
2340 if (adapter->active_ports)
2341 return 0;
2342
2343 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2344 }
2345
2346 static int ehea_up(struct net_device *dev)
2347 {
2348 int ret, i;
2349 struct ehea_port *port = netdev_priv(dev);
2350
2351 if (port->state == EHEA_PORT_UP)
2352 return 0;
2353
2354 ret = ehea_port_res_setup(port, port->num_def_qps);
2355 if (ret) {
2356 netdev_err(dev, "port_res_failed\n");
2357 goto out;
2358 }
2359
2360 /* Set default QP for this port */
2361 ret = ehea_configure_port(port);
2362 if (ret) {
2363 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2364 goto out_clean_pr;
2365 }
2366
2367 ret = ehea_reg_interrupts(dev);
2368 if (ret) {
2369 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2370 goto out_clean_pr;
2371 }
2372
2373 for (i = 0; i < port->num_def_qps; i++) {
2374 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2375 if (ret) {
2376 netdev_err(dev, "activate_qp failed\n");
2377 goto out_free_irqs;
2378 }
2379 }
2380
2381 for (i = 0; i < port->num_def_qps; i++) {
2382 ret = ehea_fill_port_res(&port->port_res[i]);
2383 if (ret) {
2384 netdev_err(dev, "out_free_irqs\n");
2385 goto out_free_irqs;
2386 }
2387 }
2388
2389 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2390 if (ret) {
2391 ret = -EIO;
2392 goto out_free_irqs;
2393 }
2394
2395 port->state = EHEA_PORT_UP;
2396
2397 ret = 0;
2398 goto out;
2399
2400 out_free_irqs:
2401 ehea_free_interrupts(dev);
2402
2403 out_clean_pr:
2404 ehea_clean_all_portres(port);
2405 out:
2406 if (ret)
2407 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2408
2409 ehea_update_bcmc_registrations();
2410 ehea_update_firmware_handles();
2411
2412 return ret;
2413 }
2414
2415 static void port_napi_disable(struct ehea_port *port)
2416 {
2417 int i;
2418
2419 for (i = 0; i < port->num_def_qps; i++)
2420 napi_disable(&port->port_res[i].napi);
2421 }
2422
2423 static void port_napi_enable(struct ehea_port *port)
2424 {
2425 int i;
2426
2427 for (i = 0; i < port->num_def_qps; i++)
2428 napi_enable(&port->port_res[i].napi);
2429 }
2430
2431 static int ehea_open(struct net_device *dev)
2432 {
2433 int ret;
2434 struct ehea_port *port = netdev_priv(dev);
2435
2436 mutex_lock(&port->port_lock);
2437
2438 netif_info(port, ifup, dev, "enabling port\n");
2439
2440 netif_carrier_off(dev);
2441
2442 ret = ehea_up(dev);
2443 if (!ret) {
2444 port_napi_enable(port);
2445 netif_tx_start_all_queues(dev);
2446 }
2447
2448 mutex_unlock(&port->port_lock);
2449 schedule_delayed_work(&port->stats_work,
2450 round_jiffies_relative(msecs_to_jiffies(1000)));
2451
2452 return ret;
2453 }
2454
2455 static int ehea_down(struct net_device *dev)
2456 {
2457 int ret;
2458 struct ehea_port *port = netdev_priv(dev);
2459
2460 if (port->state == EHEA_PORT_DOWN)
2461 return 0;
2462
2463 ehea_drop_multicast_list(dev);
2464 ehea_allmulti(dev, 0);
2465 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2466
2467 ehea_free_interrupts(dev);
2468
2469 port->state = EHEA_PORT_DOWN;
2470
2471 ehea_update_bcmc_registrations();
2472
2473 ret = ehea_clean_all_portres(port);
2474 if (ret)
2475 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2476
2477 ehea_update_firmware_handles();
2478
2479 return ret;
2480 }
2481
2482 static int ehea_stop(struct net_device *dev)
2483 {
2484 int ret;
2485 struct ehea_port *port = netdev_priv(dev);
2486
2487 netif_info(port, ifdown, dev, "disabling port\n");
2488
2489 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2490 cancel_work_sync(&port->reset_task);
2491 cancel_delayed_work_sync(&port->stats_work);
2492 mutex_lock(&port->port_lock);
2493 netif_tx_stop_all_queues(dev);
2494 port_napi_disable(port);
2495 ret = ehea_down(dev);
2496 mutex_unlock(&port->port_lock);
2497 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2498 return ret;
2499 }
2500
2501 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2502 {
2503 struct ehea_qp qp = *orig_qp;
2504 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2505 struct ehea_swqe *swqe;
2506 int wqe_index;
2507 int i;
2508
2509 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2510 swqe = ehea_get_swqe(&qp, &wqe_index);
2511 swqe->tx_control |= EHEA_SWQE_PURGE;
2512 }
2513 }
2514
2515 static void ehea_flush_sq(struct ehea_port *port)
2516 {
2517 int i;
2518
2519 for (i = 0; i < port->num_def_qps; i++) {
2520 struct ehea_port_res *pr = &port->port_res[i];
2521 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2522 int ret;
2523
2524 ret = wait_event_timeout(port->swqe_avail_wq,
2525 atomic_read(&pr->swqe_avail) >= swqe_max,
2526 msecs_to_jiffies(100));
2527
2528 if (!ret) {
2529 pr_err("WARNING: sq not flushed completely\n");
2530 break;
2531 }
2532 }
2533 }
2534
2535 static int ehea_stop_qps(struct net_device *dev)
2536 {
2537 struct ehea_port *port = netdev_priv(dev);
2538 struct ehea_adapter *adapter = port->adapter;
2539 struct hcp_modify_qp_cb0 *cb0;
2540 int ret = -EIO;
2541 int dret;
2542 int i;
2543 u64 hret;
2544 u64 dummy64 = 0;
2545 u16 dummy16 = 0;
2546
2547 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2548 if (!cb0) {
2549 ret = -ENOMEM;
2550 goto out;
2551 }
2552
2553 for (i = 0; i < (port->num_def_qps); i++) {
2554 struct ehea_port_res *pr = &port->port_res[i];
2555 struct ehea_qp *qp = pr->qp;
2556
2557 /* Purge send queue */
2558 ehea_purge_sq(qp);
2559
2560 /* Disable queue pair */
2561 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2562 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2563 cb0);
2564 if (hret != H_SUCCESS) {
2565 pr_err("query_ehea_qp failed (1)\n");
2566 goto out;
2567 }
2568
2569 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2570 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2571
2572 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2573 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2574 1), cb0, &dummy64,
2575 &dummy64, &dummy16, &dummy16);
2576 if (hret != H_SUCCESS) {
2577 pr_err("modify_ehea_qp failed (1)\n");
2578 goto out;
2579 }
2580
2581 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2582 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2583 cb0);
2584 if (hret != H_SUCCESS) {
2585 pr_err("query_ehea_qp failed (2)\n");
2586 goto out;
2587 }
2588
2589 /* deregister shared memory regions */
2590 dret = ehea_rem_smrs(pr);
2591 if (dret) {
2592 pr_err("unreg shared memory region failed\n");
2593 goto out;
2594 }
2595 }
2596
2597 ret = 0;
2598 out:
2599 free_page((unsigned long)cb0);
2600
2601 return ret;
2602 }
2603
2604 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2605 {
2606 struct ehea_qp qp = *orig_qp;
2607 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2608 struct ehea_rwqe *rwqe;
2609 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2610 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2611 struct sk_buff *skb;
2612 u32 lkey = pr->recv_mr.lkey;
2613
2614
2615 int i;
2616 int index;
2617
2618 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2619 rwqe = ehea_get_next_rwqe(&qp, 2);
2620 rwqe->sg_list[0].l_key = lkey;
2621 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2622 skb = skba_rq2[index];
2623 if (skb)
2624 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2625 }
2626
2627 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2628 rwqe = ehea_get_next_rwqe(&qp, 3);
2629 rwqe->sg_list[0].l_key = lkey;
2630 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2631 skb = skba_rq3[index];
2632 if (skb)
2633 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2634 }
2635 }
2636
2637 static int ehea_restart_qps(struct net_device *dev)
2638 {
2639 struct ehea_port *port = netdev_priv(dev);
2640 struct ehea_adapter *adapter = port->adapter;
2641 int ret = 0;
2642 int i;
2643
2644 struct hcp_modify_qp_cb0 *cb0;
2645 u64 hret;
2646 u64 dummy64 = 0;
2647 u16 dummy16 = 0;
2648
2649 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2650 if (!cb0) {
2651 ret = -ENOMEM;
2652 goto out;
2653 }
2654
2655 for (i = 0; i < (port->num_def_qps); i++) {
2656 struct ehea_port_res *pr = &port->port_res[i];
2657 struct ehea_qp *qp = pr->qp;
2658
2659 ret = ehea_gen_smrs(pr);
2660 if (ret) {
2661 netdev_err(dev, "creation of shared memory regions failed\n");
2662 goto out;
2663 }
2664
2665 ehea_update_rqs(qp, pr);
2666
2667 /* Enable queue pair */
2668 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2669 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2670 cb0);
2671 if (hret != H_SUCCESS) {
2672 netdev_err(dev, "query_ehea_qp failed (1)\n");
2673 goto out;
2674 }
2675
2676 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2677 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2678
2679 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2680 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2681 1), cb0, &dummy64,
2682 &dummy64, &dummy16, &dummy16);
2683 if (hret != H_SUCCESS) {
2684 netdev_err(dev, "modify_ehea_qp failed (1)\n");
2685 goto out;
2686 }
2687
2688 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2689 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2690 cb0);
2691 if (hret != H_SUCCESS) {
2692 netdev_err(dev, "query_ehea_qp failed (2)\n");
2693 goto out;
2694 }
2695
2696 /* refill entire queue */
2697 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2698 ehea_refill_rq2(pr, 0);
2699 ehea_refill_rq3(pr, 0);
2700 }
2701 out:
2702 free_page((unsigned long)cb0);
2703
2704 return ret;
2705 }
2706
2707 static void ehea_reset_port(struct work_struct *work)
2708 {
2709 int ret;
2710 struct ehea_port *port =
2711 container_of(work, struct ehea_port, reset_task);
2712 struct net_device *dev = port->netdev;
2713
2714 mutex_lock(&dlpar_mem_lock);
2715 port->resets++;
2716 mutex_lock(&port->port_lock);
2717 netif_tx_disable(dev);
2718
2719 port_napi_disable(port);
2720
2721 ehea_down(dev);
2722
2723 ret = ehea_up(dev);
2724 if (ret)
2725 goto out;
2726
2727 ehea_set_multicast_list(dev);
2728
2729 netif_info(port, timer, dev, "reset successful\n");
2730
2731 port_napi_enable(port);
2732
2733 netif_tx_wake_all_queues(dev);
2734 out:
2735 mutex_unlock(&port->port_lock);
2736 mutex_unlock(&dlpar_mem_lock);
2737 }
2738
2739 static void ehea_rereg_mrs(void)
2740 {
2741 int ret, i;
2742 struct ehea_adapter *adapter;
2743
2744 pr_info("LPAR memory changed - re-initializing driver\n");
2745
2746 list_for_each_entry(adapter, &adapter_list, list)
2747 if (adapter->active_ports) {
2748 /* Shutdown all ports */
2749 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2750 struct ehea_port *port = adapter->port[i];
2751 struct net_device *dev;
2752
2753 if (!port)
2754 continue;
2755
2756 dev = port->netdev;
2757
2758 if (dev->flags & IFF_UP) {
2759 mutex_lock(&port->port_lock);
2760 netif_tx_disable(dev);
2761 ehea_flush_sq(port);
2762 ret = ehea_stop_qps(dev);
2763 if (ret) {
2764 mutex_unlock(&port->port_lock);
2765 goto out;
2766 }
2767 port_napi_disable(port);
2768 mutex_unlock(&port->port_lock);
2769 }
2770 reset_sq_restart_flag(port);
2771 }
2772
2773 /* Unregister old memory region */
2774 ret = ehea_rem_mr(&adapter->mr);
2775 if (ret) {
2776 pr_err("unregister MR failed - driver inoperable!\n");
2777 goto out;
2778 }
2779 }
2780
2781 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2782
2783 list_for_each_entry(adapter, &adapter_list, list)
2784 if (adapter->active_ports) {
2785 /* Register new memory region */
2786 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2787 if (ret) {
2788 pr_err("register MR failed - driver inoperable!\n");
2789 goto out;
2790 }
2791
2792 /* Restart all ports */
2793 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2794 struct ehea_port *port = adapter->port[i];
2795
2796 if (port) {
2797 struct net_device *dev = port->netdev;
2798
2799 if (dev->flags & IFF_UP) {
2800 mutex_lock(&port->port_lock);
2801 ret = ehea_restart_qps(dev);
2802 if (!ret) {
2803 check_sqs(port);
2804 port_napi_enable(port);
2805 netif_tx_wake_all_queues(dev);
2806 } else {
2807 netdev_err(dev, "Unable to restart QPS\n");
2808 }
2809 mutex_unlock(&port->port_lock);
2810 }
2811 }
2812 }
2813 }
2814 pr_info("re-initializing driver complete\n");
2815 out:
2816 return;
2817 }
2818
2819 static void ehea_tx_watchdog(struct net_device *dev)
2820 {
2821 struct ehea_port *port = netdev_priv(dev);
2822
2823 if (netif_carrier_ok(dev) &&
2824 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2825 ehea_schedule_port_reset(port);
2826 }
2827
2828 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2829 {
2830 struct hcp_query_ehea *cb;
2831 u64 hret;
2832 int ret;
2833
2834 cb = (void *)get_zeroed_page(GFP_KERNEL);
2835 if (!cb) {
2836 ret = -ENOMEM;
2837 goto out;
2838 }
2839
2840 hret = ehea_h_query_ehea(adapter->handle, cb);
2841
2842 if (hret != H_SUCCESS) {
2843 ret = -EIO;
2844 goto out_herr;
2845 }
2846
2847 adapter->max_mc_mac = cb->max_mc_mac - 1;
2848 ret = 0;
2849
2850 out_herr:
2851 free_page((unsigned long)cb);
2852 out:
2853 return ret;
2854 }
2855
2856 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2857 {
2858 struct hcp_ehea_port_cb4 *cb4;
2859 u64 hret;
2860 int ret = 0;
2861
2862 *jumbo = 0;
2863
2864 /* (Try to) enable *jumbo frames */
2865 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2866 if (!cb4) {
2867 pr_err("no mem for cb4\n");
2868 ret = -ENOMEM;
2869 goto out;
2870 } else {
2871 hret = ehea_h_query_ehea_port(port->adapter->handle,
2872 port->logical_port_id,
2873 H_PORT_CB4,
2874 H_PORT_CB4_JUMBO, cb4);
2875 if (hret == H_SUCCESS) {
2876 if (cb4->jumbo_frame)
2877 *jumbo = 1;
2878 else {
2879 cb4->jumbo_frame = 1;
2880 hret = ehea_h_modify_ehea_port(port->adapter->
2881 handle,
2882 port->
2883 logical_port_id,
2884 H_PORT_CB4,
2885 H_PORT_CB4_JUMBO,
2886 cb4);
2887 if (hret == H_SUCCESS)
2888 *jumbo = 1;
2889 }
2890 } else
2891 ret = -EINVAL;
2892
2893 free_page((unsigned long)cb4);
2894 }
2895 out:
2896 return ret;
2897 }
2898
2899 static ssize_t ehea_show_port_id(struct device *dev,
2900 struct device_attribute *attr, char *buf)
2901 {
2902 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2903 return sprintf(buf, "%d", port->logical_port_id);
2904 }
2905
2906 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2907
2908 static void logical_port_release(struct device *dev)
2909 {
2910 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2911 of_node_put(port->ofdev.dev.of_node);
2912 }
2913
2914 static struct device *ehea_register_port(struct ehea_port *port,
2915 struct device_node *dn)
2916 {
2917 int ret;
2918
2919 port->ofdev.dev.of_node = of_node_get(dn);
2920 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2921 port->ofdev.dev.bus = &ibmebus_bus_type;
2922
2923 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2924 port->ofdev.dev.release = logical_port_release;
2925
2926 ret = of_device_register(&port->ofdev);
2927 if (ret) {
2928 pr_err("failed to register device. ret=%d\n", ret);
2929 goto out;
2930 }
2931
2932 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2933 if (ret) {
2934 pr_err("failed to register attributes, ret=%d\n", ret);
2935 goto out_unreg_of_dev;
2936 }
2937
2938 return &port->ofdev.dev;
2939
2940 out_unreg_of_dev:
2941 of_device_unregister(&port->ofdev);
2942 out:
2943 return NULL;
2944 }
2945
2946 static void ehea_unregister_port(struct ehea_port *port)
2947 {
2948 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2949 of_device_unregister(&port->ofdev);
2950 }
2951
2952 static const struct net_device_ops ehea_netdev_ops = {
2953 .ndo_open = ehea_open,
2954 .ndo_stop = ehea_stop,
2955 .ndo_start_xmit = ehea_start_xmit,
2956 #ifdef CONFIG_NET_POLL_CONTROLLER
2957 .ndo_poll_controller = ehea_netpoll,
2958 #endif
2959 .ndo_get_stats64 = ehea_get_stats64,
2960 .ndo_set_mac_address = ehea_set_mac_addr,
2961 .ndo_validate_addr = eth_validate_addr,
2962 .ndo_set_rx_mode = ehea_set_multicast_list,
2963 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
2964 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
2965 .ndo_tx_timeout = ehea_tx_watchdog,
2966 };
2967
2968 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2969 u32 logical_port_id,
2970 struct device_node *dn)
2971 {
2972 int ret;
2973 struct net_device *dev;
2974 struct ehea_port *port;
2975 struct device *port_dev;
2976 int jumbo;
2977
2978 /* allocate memory for the port structures */
2979 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2980
2981 if (!dev) {
2982 ret = -ENOMEM;
2983 goto out_err;
2984 }
2985
2986 port = netdev_priv(dev);
2987
2988 mutex_init(&port->port_lock);
2989 port->state = EHEA_PORT_DOWN;
2990 port->sig_comp_iv = sq_entries / 10;
2991
2992 port->adapter = adapter;
2993 port->netdev = dev;
2994 port->logical_port_id = logical_port_id;
2995
2996 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2997
2998 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2999 if (!port->mc_list) {
3000 ret = -ENOMEM;
3001 goto out_free_ethdev;
3002 }
3003
3004 INIT_LIST_HEAD(&port->mc_list->list);
3005
3006 ret = ehea_sense_port_attr(port);
3007 if (ret)
3008 goto out_free_mc_list;
3009
3010 netif_set_real_num_rx_queues(dev, port->num_def_qps);
3011 netif_set_real_num_tx_queues(dev, port->num_def_qps);
3012
3013 port_dev = ehea_register_port(port, dn);
3014 if (!port_dev)
3015 goto out_free_mc_list;
3016
3017 SET_NETDEV_DEV(dev, port_dev);
3018
3019 /* initialize net_device structure */
3020 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3021
3022 dev->netdev_ops = &ehea_netdev_ops;
3023 ehea_set_ethtool_ops(dev);
3024
3025 dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3026 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3027 dev->features = NETIF_F_SG | NETIF_F_TSO |
3028 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3029 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3030 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3031 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3032 NETIF_F_IP_CSUM;
3033 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3034
3035 /* MTU range: 68 - 9022 */
3036 dev->min_mtu = ETH_MIN_MTU;
3037 dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3038
3039 INIT_WORK(&port->reset_task, ehea_reset_port);
3040 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3041
3042 init_waitqueue_head(&port->swqe_avail_wq);
3043 init_waitqueue_head(&port->restart_wq);
3044
3045 ret = register_netdev(dev);
3046 if (ret) {
3047 pr_err("register_netdev failed. ret=%d\n", ret);
3048 goto out_unreg_port;
3049 }
3050
3051 ret = ehea_get_jumboframe_status(port, &jumbo);
3052 if (ret)
3053 netdev_err(dev, "failed determining jumbo frame status\n");
3054
3055 netdev_info(dev, "Jumbo frames are %sabled\n",
3056 jumbo == 1 ? "en" : "dis");
3057
3058 adapter->active_ports++;
3059
3060 return port;
3061
3062 out_unreg_port:
3063 ehea_unregister_port(port);
3064
3065 out_free_mc_list:
3066 kfree(port->mc_list);
3067
3068 out_free_ethdev:
3069 free_netdev(dev);
3070
3071 out_err:
3072 pr_err("setting up logical port with id=%d failed, ret=%d\n",
3073 logical_port_id, ret);
3074 return NULL;
3075 }
3076
3077 static void ehea_shutdown_single_port(struct ehea_port *port)
3078 {
3079 struct ehea_adapter *adapter = port->adapter;
3080
3081 cancel_work_sync(&port->reset_task);
3082 cancel_delayed_work_sync(&port->stats_work);
3083 unregister_netdev(port->netdev);
3084 ehea_unregister_port(port);
3085 kfree(port->mc_list);
3086 free_netdev(port->netdev);
3087 adapter->active_ports--;
3088 }
3089
3090 static int ehea_setup_ports(struct ehea_adapter *adapter)
3091 {
3092 struct device_node *lhea_dn;
3093 struct device_node *eth_dn = NULL;
3094
3095 const u32 *dn_log_port_id;
3096 int i = 0;
3097
3098 lhea_dn = adapter->ofdev->dev.of_node;
3099 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3100
3101 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3102 NULL);
3103 if (!dn_log_port_id) {
3104 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3105 continue;
3106 }
3107
3108 if (ehea_add_adapter_mr(adapter)) {
3109 pr_err("creating MR failed\n");
3110 of_node_put(eth_dn);
3111 return -EIO;
3112 }
3113
3114 adapter->port[i] = ehea_setup_single_port(adapter,
3115 *dn_log_port_id,
3116 eth_dn);
3117 if (adapter->port[i])
3118 netdev_info(adapter->port[i]->netdev,
3119 "logical port id #%d\n", *dn_log_port_id);
3120 else
3121 ehea_remove_adapter_mr(adapter);
3122
3123 i++;
3124 }
3125 return 0;
3126 }
3127
3128 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3129 u32 logical_port_id)
3130 {
3131 struct device_node *lhea_dn;
3132 struct device_node *eth_dn = NULL;
3133 const u32 *dn_log_port_id;
3134
3135 lhea_dn = adapter->ofdev->dev.of_node;
3136 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3137
3138 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3139 NULL);
3140 if (dn_log_port_id)
3141 if (*dn_log_port_id == logical_port_id)
3142 return eth_dn;
3143 }
3144
3145 return NULL;
3146 }
3147
3148 static ssize_t ehea_probe_port(struct device *dev,
3149 struct device_attribute *attr,
3150 const char *buf, size_t count)
3151 {
3152 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3153 struct ehea_port *port;
3154 struct device_node *eth_dn = NULL;
3155 int i;
3156
3157 u32 logical_port_id;
3158
3159 sscanf(buf, "%d", &logical_port_id);
3160
3161 port = ehea_get_port(adapter, logical_port_id);
3162
3163 if (port) {
3164 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3165 logical_port_id);
3166 return -EINVAL;
3167 }
3168
3169 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3170
3171 if (!eth_dn) {
3172 pr_info("no logical port with id %d found\n", logical_port_id);
3173 return -EINVAL;
3174 }
3175
3176 if (ehea_add_adapter_mr(adapter)) {
3177 pr_err("creating MR failed\n");
3178 return -EIO;
3179 }
3180
3181 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3182
3183 of_node_put(eth_dn);
3184
3185 if (port) {
3186 for (i = 0; i < EHEA_MAX_PORTS; i++)
3187 if (!adapter->port[i]) {
3188 adapter->port[i] = port;
3189 break;
3190 }
3191
3192 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3193 logical_port_id);
3194 } else {
3195 ehea_remove_adapter_mr(adapter);
3196 return -EIO;
3197 }
3198
3199 return (ssize_t) count;
3200 }
3201
3202 static ssize_t ehea_remove_port(struct device *dev,
3203 struct device_attribute *attr,
3204 const char *buf, size_t count)
3205 {
3206 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3207 struct ehea_port *port;
3208 int i;
3209 u32 logical_port_id;
3210
3211 sscanf(buf, "%d", &logical_port_id);
3212
3213 port = ehea_get_port(adapter, logical_port_id);
3214
3215 if (port) {
3216 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3217 logical_port_id);
3218
3219 ehea_shutdown_single_port(port);
3220
3221 for (i = 0; i < EHEA_MAX_PORTS; i++)
3222 if (adapter->port[i] == port) {
3223 adapter->port[i] = NULL;
3224 break;
3225 }
3226 } else {
3227 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3228 logical_port_id);
3229 return -EINVAL;
3230 }
3231
3232 ehea_remove_adapter_mr(adapter);
3233
3234 return (ssize_t) count;
3235 }
3236
3237 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3238 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3239
3240 static int ehea_create_device_sysfs(struct platform_device *dev)
3241 {
3242 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3243 if (ret)
3244 goto out;
3245
3246 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3247 out:
3248 return ret;
3249 }
3250
3251 static void ehea_remove_device_sysfs(struct platform_device *dev)
3252 {
3253 device_remove_file(&dev->dev, &dev_attr_probe_port);
3254 device_remove_file(&dev->dev, &dev_attr_remove_port);
3255 }
3256
3257 static int ehea_reboot_notifier(struct notifier_block *nb,
3258 unsigned long action, void *unused)
3259 {
3260 if (action == SYS_RESTART) {
3261 pr_info("Reboot: freeing all eHEA resources\n");
3262 ibmebus_unregister_driver(&ehea_driver);
3263 }
3264 return NOTIFY_DONE;
3265 }
3266
3267 static struct notifier_block ehea_reboot_nb = {
3268 .notifier_call = ehea_reboot_notifier,
3269 };
3270
3271 static int ehea_mem_notifier(struct notifier_block *nb,
3272 unsigned long action, void *data)
3273 {
3274 int ret = NOTIFY_BAD;
3275 struct memory_notify *arg = data;
3276
3277 mutex_lock(&dlpar_mem_lock);
3278
3279 switch (action) {
3280 case MEM_CANCEL_OFFLINE:
3281 pr_info("memory offlining canceled");
3282 /* Fall through: re-add canceled memory block */
3283
3284 case MEM_ONLINE:
3285 pr_info("memory is going online");
3286 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3287 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3288 goto out_unlock;
3289 ehea_rereg_mrs();
3290 break;
3291
3292 case MEM_GOING_OFFLINE:
3293 pr_info("memory is going offline");
3294 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3295 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3296 goto out_unlock;
3297 ehea_rereg_mrs();
3298 break;
3299
3300 default:
3301 break;
3302 }
3303
3304 ehea_update_firmware_handles();
3305 ret = NOTIFY_OK;
3306
3307 out_unlock:
3308 mutex_unlock(&dlpar_mem_lock);
3309 return ret;
3310 }
3311
3312 static struct notifier_block ehea_mem_nb = {
3313 .notifier_call = ehea_mem_notifier,
3314 };
3315
3316 static void ehea_crash_handler(void)
3317 {
3318 int i;
3319
3320 if (ehea_fw_handles.arr)
3321 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3322 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3323 ehea_fw_handles.arr[i].fwh,
3324 FORCE_FREE);
3325
3326 if (ehea_bcmc_regs.arr)
3327 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3328 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3329 ehea_bcmc_regs.arr[i].port_id,
3330 ehea_bcmc_regs.arr[i].reg_type,
3331 ehea_bcmc_regs.arr[i].macaddr,
3332 0, H_DEREG_BCMC);
3333 }
3334
3335 static atomic_t ehea_memory_hooks_registered;
3336
3337 /* Register memory hooks on probe of first adapter */
3338 static int ehea_register_memory_hooks(void)
3339 {
3340 int ret = 0;
3341
3342 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3343 return 0;
3344
3345 ret = ehea_create_busmap();
3346 if (ret) {
3347 pr_info("ehea_create_busmap failed\n");
3348 goto out;
3349 }
3350
3351 ret = register_reboot_notifier(&ehea_reboot_nb);
3352 if (ret) {
3353 pr_info("register_reboot_notifier failed\n");
3354 goto out;
3355 }
3356
3357 ret = register_memory_notifier(&ehea_mem_nb);
3358 if (ret) {
3359 pr_info("register_memory_notifier failed\n");
3360 goto out2;
3361 }
3362
3363 ret = crash_shutdown_register(ehea_crash_handler);
3364 if (ret) {
3365 pr_info("crash_shutdown_register failed\n");
3366 goto out3;
3367 }
3368
3369 return 0;
3370
3371 out3:
3372 unregister_memory_notifier(&ehea_mem_nb);
3373 out2:
3374 unregister_reboot_notifier(&ehea_reboot_nb);
3375 out:
3376 atomic_dec(&ehea_memory_hooks_registered);
3377 return ret;
3378 }
3379
3380 static void ehea_unregister_memory_hooks(void)
3381 {
3382 /* Only remove the hooks if we've registered them */
3383 if (atomic_read(&ehea_memory_hooks_registered) == 0)
3384 return;
3385
3386 unregister_reboot_notifier(&ehea_reboot_nb);
3387 if (crash_shutdown_unregister(ehea_crash_handler))
3388 pr_info("failed unregistering crash handler\n");
3389 unregister_memory_notifier(&ehea_mem_nb);
3390 }
3391
3392 static int ehea_probe_adapter(struct platform_device *dev)
3393 {
3394 struct ehea_adapter *adapter;
3395 const u64 *adapter_handle;
3396 int ret;
3397 int i;
3398
3399 ret = ehea_register_memory_hooks();
3400 if (ret)
3401 return ret;
3402
3403 if (!dev || !dev->dev.of_node) {
3404 pr_err("Invalid ibmebus device probed\n");
3405 return -EINVAL;
3406 }
3407
3408 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3409 if (!adapter) {
3410 ret = -ENOMEM;
3411 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3412 goto out;
3413 }
3414
3415 list_add(&adapter->list, &adapter_list);
3416
3417 adapter->ofdev = dev;
3418
3419 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3420 NULL);
3421 if (adapter_handle)
3422 adapter->handle = *adapter_handle;
3423
3424 if (!adapter->handle) {
3425 dev_err(&dev->dev, "failed getting handle for adapter"
3426 " '%pOF'\n", dev->dev.of_node);
3427 ret = -ENODEV;
3428 goto out_free_ad;
3429 }
3430
3431 adapter->pd = EHEA_PD_ID;
3432
3433 platform_set_drvdata(dev, adapter);
3434
3435
3436 /* initialize adapter and ports */
3437 /* get adapter properties */
3438 ret = ehea_sense_adapter_attr(adapter);
3439 if (ret) {
3440 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3441 goto out_free_ad;
3442 }
3443
3444 adapter->neq = ehea_create_eq(adapter,
3445 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3446 if (!adapter->neq) {
3447 ret = -EIO;
3448 dev_err(&dev->dev, "NEQ creation failed\n");
3449 goto out_free_ad;
3450 }
3451
3452 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3453 (unsigned long)adapter);
3454
3455 ret = ehea_create_device_sysfs(dev);
3456 if (ret)
3457 goto out_kill_eq;
3458
3459 ret = ehea_setup_ports(adapter);
3460 if (ret) {
3461 dev_err(&dev->dev, "setup_ports failed\n");
3462 goto out_rem_dev_sysfs;
3463 }
3464
3465 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3466 ehea_interrupt_neq, 0,
3467 "ehea_neq", adapter);
3468 if (ret) {
3469 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3470 goto out_shutdown_ports;
3471 }
3472
3473 /* Handle any events that might be pending. */
3474 tasklet_hi_schedule(&adapter->neq_tasklet);
3475
3476 ret = 0;
3477 goto out;
3478
3479 out_shutdown_ports:
3480 for (i = 0; i < EHEA_MAX_PORTS; i++)
3481 if (adapter->port[i]) {
3482 ehea_shutdown_single_port(adapter->port[i]);
3483 adapter->port[i] = NULL;
3484 }
3485
3486 out_rem_dev_sysfs:
3487 ehea_remove_device_sysfs(dev);
3488
3489 out_kill_eq:
3490 ehea_destroy_eq(adapter->neq);
3491
3492 out_free_ad:
3493 list_del(&adapter->list);
3494
3495 out:
3496 ehea_update_firmware_handles();
3497
3498 return ret;
3499 }
3500
3501 static int ehea_remove(struct platform_device *dev)
3502 {
3503 struct ehea_adapter *adapter = platform_get_drvdata(dev);
3504 int i;
3505
3506 for (i = 0; i < EHEA_MAX_PORTS; i++)
3507 if (adapter->port[i]) {
3508 ehea_shutdown_single_port(adapter->port[i]);
3509 adapter->port[i] = NULL;
3510 }
3511
3512 ehea_remove_device_sysfs(dev);
3513
3514 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3515 tasklet_kill(&adapter->neq_tasklet);
3516
3517 ehea_destroy_eq(adapter->neq);
3518 ehea_remove_adapter_mr(adapter);
3519 list_del(&adapter->list);
3520
3521 ehea_update_firmware_handles();
3522
3523 return 0;
3524 }
3525
3526 static int check_module_parm(void)
3527 {
3528 int ret = 0;
3529
3530 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3531 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3532 pr_info("Bad parameter: rq1_entries\n");
3533 ret = -EINVAL;
3534 }
3535 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3536 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3537 pr_info("Bad parameter: rq2_entries\n");
3538 ret = -EINVAL;
3539 }
3540 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3541 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3542 pr_info("Bad parameter: rq3_entries\n");
3543 ret = -EINVAL;
3544 }
3545 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3546 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3547 pr_info("Bad parameter: sq_entries\n");
3548 ret = -EINVAL;
3549 }
3550
3551 return ret;
3552 }
3553
3554 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3555 {
3556 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3557 }
3558
3559 static DRIVER_ATTR_RO(capabilities);
3560
3561 static int __init ehea_module_init(void)
3562 {
3563 int ret;
3564
3565 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3566
3567 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3568 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3569
3570 mutex_init(&ehea_fw_handles.lock);
3571 spin_lock_init(&ehea_bcmc_regs.lock);
3572
3573 ret = check_module_parm();
3574 if (ret)
3575 goto out;
3576
3577 ret = ibmebus_register_driver(&ehea_driver);
3578 if (ret) {
3579 pr_err("failed registering eHEA device driver on ebus\n");
3580 goto out;
3581 }
3582
3583 ret = driver_create_file(&ehea_driver.driver,
3584 &driver_attr_capabilities);
3585 if (ret) {
3586 pr_err("failed to register capabilities attribute, ret=%d\n",
3587 ret);
3588 goto out2;
3589 }
3590
3591 return ret;
3592
3593 out2:
3594 ibmebus_unregister_driver(&ehea_driver);
3595 out:
3596 return ret;
3597 }
3598
3599 static void __exit ehea_module_exit(void)
3600 {
3601 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3602 ibmebus_unregister_driver(&ehea_driver);
3603 ehea_unregister_memory_hooks();
3604 kfree(ehea_fw_handles.arr);
3605 kfree(ehea_bcmc_regs.arr);
3606 ehea_destroy_busmap();
3607 }
3608
3609 module_init(ehea_module_init);
3610 module_exit(ehea_module_exit);
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