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Merge tag 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux...
[deliverable/linux.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 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 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 struct rtnl_link_stats64 *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 return stats;
356 }
357
358 static void ehea_update_stats(struct work_struct *work)
359 {
360 struct ehea_port *port =
361 container_of(work, struct ehea_port, stats_work.work);
362 struct net_device *dev = port->netdev;
363 struct rtnl_link_stats64 *stats = &port->stats;
364 struct hcp_ehea_port_cb2 *cb2;
365 u64 hret;
366
367 cb2 = (void *)get_zeroed_page(GFP_KERNEL);
368 if (!cb2) {
369 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
370 goto resched;
371 }
372
373 hret = ehea_h_query_ehea_port(port->adapter->handle,
374 port->logical_port_id,
375 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
376 if (hret != H_SUCCESS) {
377 netdev_err(dev, "query_ehea_port failed\n");
378 goto out_herr;
379 }
380
381 if (netif_msg_hw(port))
382 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
383
384 stats->multicast = cb2->rxmcp;
385 stats->rx_errors = cb2->rxuerr;
386
387 out_herr:
388 free_page((unsigned long)cb2);
389 resched:
390 schedule_delayed_work(&port->stats_work,
391 round_jiffies_relative(msecs_to_jiffies(1000)));
392 }
393
394 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
395 {
396 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
397 struct net_device *dev = pr->port->netdev;
398 int max_index_mask = pr->rq1_skba.len - 1;
399 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
400 int adder = 0;
401 int i;
402
403 pr->rq1_skba.os_skbs = 0;
404
405 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
406 if (nr_of_wqes > 0)
407 pr->rq1_skba.index = index;
408 pr->rq1_skba.os_skbs = fill_wqes;
409 return;
410 }
411
412 for (i = 0; i < fill_wqes; i++) {
413 if (!skb_arr_rq1[index]) {
414 skb_arr_rq1[index] = netdev_alloc_skb(dev,
415 EHEA_L_PKT_SIZE);
416 if (!skb_arr_rq1[index]) {
417 pr->rq1_skba.os_skbs = fill_wqes - i;
418 break;
419 }
420 }
421 index--;
422 index &= max_index_mask;
423 adder++;
424 }
425
426 if (adder == 0)
427 return;
428
429 /* Ring doorbell */
430 ehea_update_rq1a(pr->qp, adder);
431 }
432
433 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
434 {
435 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
436 struct net_device *dev = pr->port->netdev;
437 int i;
438
439 if (nr_rq1a > pr->rq1_skba.len) {
440 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
441 return;
442 }
443
444 for (i = 0; i < nr_rq1a; i++) {
445 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
446 if (!skb_arr_rq1[i])
447 break;
448 }
449 /* Ring doorbell */
450 ehea_update_rq1a(pr->qp, i - 1);
451 }
452
453 static int ehea_refill_rq_def(struct ehea_port_res *pr,
454 struct ehea_q_skb_arr *q_skba, int rq_nr,
455 int num_wqes, int wqe_type, int packet_size)
456 {
457 struct net_device *dev = pr->port->netdev;
458 struct ehea_qp *qp = pr->qp;
459 struct sk_buff **skb_arr = q_skba->arr;
460 struct ehea_rwqe *rwqe;
461 int i, index, max_index_mask, fill_wqes;
462 int adder = 0;
463 int ret = 0;
464
465 fill_wqes = q_skba->os_skbs + num_wqes;
466 q_skba->os_skbs = 0;
467
468 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
469 q_skba->os_skbs = fill_wqes;
470 return ret;
471 }
472
473 index = q_skba->index;
474 max_index_mask = q_skba->len - 1;
475 for (i = 0; i < fill_wqes; i++) {
476 u64 tmp_addr;
477 struct sk_buff *skb;
478
479 skb = netdev_alloc_skb_ip_align(dev, packet_size);
480 if (!skb) {
481 q_skba->os_skbs = fill_wqes - i;
482 if (q_skba->os_skbs == q_skba->len - 2) {
483 netdev_info(pr->port->netdev,
484 "rq%i ran dry - no mem for skb\n",
485 rq_nr);
486 ret = -ENOMEM;
487 }
488 break;
489 }
490
491 skb_arr[index] = skb;
492 tmp_addr = ehea_map_vaddr(skb->data);
493 if (tmp_addr == -1) {
494 dev_consume_skb_any(skb);
495 q_skba->os_skbs = fill_wqes - i;
496 ret = 0;
497 break;
498 }
499
500 rwqe = ehea_get_next_rwqe(qp, rq_nr);
501 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
502 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
503 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
504 rwqe->sg_list[0].vaddr = tmp_addr;
505 rwqe->sg_list[0].len = packet_size;
506 rwqe->data_segments = 1;
507
508 index++;
509 index &= max_index_mask;
510 adder++;
511 }
512
513 q_skba->index = index;
514 if (adder == 0)
515 goto out;
516
517 /* Ring doorbell */
518 iosync();
519 if (rq_nr == 2)
520 ehea_update_rq2a(pr->qp, adder);
521 else
522 ehea_update_rq3a(pr->qp, adder);
523 out:
524 return ret;
525 }
526
527
528 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
529 {
530 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
531 nr_of_wqes, EHEA_RWQE2_TYPE,
532 EHEA_RQ2_PKT_SIZE);
533 }
534
535
536 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
537 {
538 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
539 nr_of_wqes, EHEA_RWQE3_TYPE,
540 EHEA_MAX_PACKET_SIZE);
541 }
542
543 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
544 {
545 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
546 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
547 return 0;
548 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
549 (cqe->header_length == 0))
550 return 0;
551 return -EINVAL;
552 }
553
554 static inline void ehea_fill_skb(struct net_device *dev,
555 struct sk_buff *skb, struct ehea_cqe *cqe,
556 struct ehea_port_res *pr)
557 {
558 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
559
560 skb_put(skb, length);
561 skb->protocol = eth_type_trans(skb, dev);
562
563 /* The packet was not an IPV4 packet so a complemented checksum was
564 calculated. The value is found in the Internet Checksum field. */
565 if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
566 skb->ip_summed = CHECKSUM_COMPLETE;
567 skb->csum = csum_unfold(~cqe->inet_checksum_value);
568 } else
569 skb->ip_summed = CHECKSUM_UNNECESSARY;
570
571 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
572 }
573
574 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
575 int arr_len,
576 struct ehea_cqe *cqe)
577 {
578 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
579 struct sk_buff *skb;
580 void *pref;
581 int x;
582
583 x = skb_index + 1;
584 x &= (arr_len - 1);
585
586 pref = skb_array[x];
587 if (pref) {
588 prefetchw(pref);
589 prefetchw(pref + EHEA_CACHE_LINE);
590
591 pref = (skb_array[x]->data);
592 prefetch(pref);
593 prefetch(pref + EHEA_CACHE_LINE);
594 prefetch(pref + EHEA_CACHE_LINE * 2);
595 prefetch(pref + EHEA_CACHE_LINE * 3);
596 }
597
598 skb = skb_array[skb_index];
599 skb_array[skb_index] = NULL;
600 return skb;
601 }
602
603 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
604 int arr_len, int wqe_index)
605 {
606 struct sk_buff *skb;
607 void *pref;
608 int x;
609
610 x = wqe_index + 1;
611 x &= (arr_len - 1);
612
613 pref = skb_array[x];
614 if (pref) {
615 prefetchw(pref);
616 prefetchw(pref + EHEA_CACHE_LINE);
617
618 pref = (skb_array[x]->data);
619 prefetchw(pref);
620 prefetchw(pref + EHEA_CACHE_LINE);
621 }
622
623 skb = skb_array[wqe_index];
624 skb_array[wqe_index] = NULL;
625 return skb;
626 }
627
628 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
629 struct ehea_cqe *cqe, int *processed_rq2,
630 int *processed_rq3)
631 {
632 struct sk_buff *skb;
633
634 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
635 pr->p_stats.err_tcp_cksum++;
636 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
637 pr->p_stats.err_ip_cksum++;
638 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
639 pr->p_stats.err_frame_crc++;
640
641 if (rq == 2) {
642 *processed_rq2 += 1;
643 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
644 dev_kfree_skb(skb);
645 } else if (rq == 3) {
646 *processed_rq3 += 1;
647 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
648 dev_kfree_skb(skb);
649 }
650
651 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
652 if (netif_msg_rx_err(pr->port)) {
653 pr_err("Critical receive error for QP %d. Resetting port.\n",
654 pr->qp->init_attr.qp_nr);
655 ehea_dump(cqe, sizeof(*cqe), "CQE");
656 }
657 ehea_schedule_port_reset(pr->port);
658 return 1;
659 }
660
661 return 0;
662 }
663
664 static int ehea_proc_rwqes(struct net_device *dev,
665 struct ehea_port_res *pr,
666 int budget)
667 {
668 struct ehea_port *port = pr->port;
669 struct ehea_qp *qp = pr->qp;
670 struct ehea_cqe *cqe;
671 struct sk_buff *skb;
672 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
673 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
674 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
675 int skb_arr_rq1_len = pr->rq1_skba.len;
676 int skb_arr_rq2_len = pr->rq2_skba.len;
677 int skb_arr_rq3_len = pr->rq3_skba.len;
678 int processed, processed_rq1, processed_rq2, processed_rq3;
679 u64 processed_bytes = 0;
680 int wqe_index, last_wqe_index, rq, port_reset;
681
682 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
683 last_wqe_index = 0;
684
685 cqe = ehea_poll_rq1(qp, &wqe_index);
686 while ((processed < budget) && cqe) {
687 ehea_inc_rq1(qp);
688 processed_rq1++;
689 processed++;
690 if (netif_msg_rx_status(port))
691 ehea_dump(cqe, sizeof(*cqe), "CQE");
692
693 last_wqe_index = wqe_index;
694 rmb();
695 if (!ehea_check_cqe(cqe, &rq)) {
696 if (rq == 1) {
697 /* LL RQ1 */
698 skb = get_skb_by_index_ll(skb_arr_rq1,
699 skb_arr_rq1_len,
700 wqe_index);
701 if (unlikely(!skb)) {
702 netif_info(port, rx_err, dev,
703 "LL rq1: skb=NULL\n");
704
705 skb = netdev_alloc_skb(dev,
706 EHEA_L_PKT_SIZE);
707 if (!skb)
708 break;
709 }
710 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
711 cqe->num_bytes_transfered - 4);
712 ehea_fill_skb(dev, skb, cqe, pr);
713 } else if (rq == 2) {
714 /* RQ2 */
715 skb = get_skb_by_index(skb_arr_rq2,
716 skb_arr_rq2_len, cqe);
717 if (unlikely(!skb)) {
718 netif_err(port, rx_err, dev,
719 "rq2: skb=NULL\n");
720 break;
721 }
722 ehea_fill_skb(dev, skb, cqe, pr);
723 processed_rq2++;
724 } else {
725 /* RQ3 */
726 skb = get_skb_by_index(skb_arr_rq3,
727 skb_arr_rq3_len, cqe);
728 if (unlikely(!skb)) {
729 netif_err(port, rx_err, dev,
730 "rq3: skb=NULL\n");
731 break;
732 }
733 ehea_fill_skb(dev, skb, cqe, pr);
734 processed_rq3++;
735 }
736
737 processed_bytes += skb->len;
738
739 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
740 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
741 cqe->vlan_tag);
742
743 napi_gro_receive(&pr->napi, skb);
744 } else {
745 pr->p_stats.poll_receive_errors++;
746 port_reset = ehea_treat_poll_error(pr, rq, cqe,
747 &processed_rq2,
748 &processed_rq3);
749 if (port_reset)
750 break;
751 }
752 cqe = ehea_poll_rq1(qp, &wqe_index);
753 }
754
755 pr->rx_packets += processed;
756 pr->rx_bytes += processed_bytes;
757
758 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
759 ehea_refill_rq2(pr, processed_rq2);
760 ehea_refill_rq3(pr, processed_rq3);
761
762 return processed;
763 }
764
765 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
766
767 static void reset_sq_restart_flag(struct ehea_port *port)
768 {
769 int i;
770
771 for (i = 0; i < port->num_def_qps; i++) {
772 struct ehea_port_res *pr = &port->port_res[i];
773 pr->sq_restart_flag = 0;
774 }
775 wake_up(&port->restart_wq);
776 }
777
778 static void check_sqs(struct ehea_port *port)
779 {
780 struct ehea_swqe *swqe;
781 int swqe_index;
782 int i, k;
783
784 for (i = 0; i < port->num_def_qps; i++) {
785 struct ehea_port_res *pr = &port->port_res[i];
786 int ret;
787 k = 0;
788 swqe = ehea_get_swqe(pr->qp, &swqe_index);
789 memset(swqe, 0, SWQE_HEADER_SIZE);
790 atomic_dec(&pr->swqe_avail);
791
792 swqe->tx_control |= EHEA_SWQE_PURGE;
793 swqe->wr_id = SWQE_RESTART_CHECK;
794 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
795 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
796 swqe->immediate_data_length = 80;
797
798 ehea_post_swqe(pr->qp, swqe);
799
800 ret = wait_event_timeout(port->restart_wq,
801 pr->sq_restart_flag == 0,
802 msecs_to_jiffies(100));
803
804 if (!ret) {
805 pr_err("HW/SW queues out of sync\n");
806 ehea_schedule_port_reset(pr->port);
807 return;
808 }
809 }
810 }
811
812
813 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
814 {
815 struct sk_buff *skb;
816 struct ehea_cq *send_cq = pr->send_cq;
817 struct ehea_cqe *cqe;
818 int quota = my_quota;
819 int cqe_counter = 0;
820 int swqe_av = 0;
821 int index;
822 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
823 pr - &pr->port->port_res[0]);
824
825 cqe = ehea_poll_cq(send_cq);
826 while (cqe && (quota > 0)) {
827 ehea_inc_cq(send_cq);
828
829 cqe_counter++;
830 rmb();
831
832 if (cqe->wr_id == SWQE_RESTART_CHECK) {
833 pr->sq_restart_flag = 1;
834 swqe_av++;
835 break;
836 }
837
838 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
839 pr_err("Bad send completion status=0x%04X\n",
840 cqe->status);
841
842 if (netif_msg_tx_err(pr->port))
843 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
844
845 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
846 pr_err("Resetting port\n");
847 ehea_schedule_port_reset(pr->port);
848 break;
849 }
850 }
851
852 if (netif_msg_tx_done(pr->port))
853 ehea_dump(cqe, sizeof(*cqe), "CQE");
854
855 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
856 == EHEA_SWQE2_TYPE)) {
857
858 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
859 skb = pr->sq_skba.arr[index];
860 dev_consume_skb_any(skb);
861 pr->sq_skba.arr[index] = NULL;
862 }
863
864 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
865 quota--;
866
867 cqe = ehea_poll_cq(send_cq);
868 }
869
870 ehea_update_feca(send_cq, cqe_counter);
871 atomic_add(swqe_av, &pr->swqe_avail);
872
873 if (unlikely(netif_tx_queue_stopped(txq) &&
874 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
875 __netif_tx_lock(txq, smp_processor_id());
876 if (netif_tx_queue_stopped(txq) &&
877 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
878 netif_tx_wake_queue(txq);
879 __netif_tx_unlock(txq);
880 }
881
882 wake_up(&pr->port->swqe_avail_wq);
883
884 return cqe;
885 }
886
887 #define EHEA_POLL_MAX_CQES 65535
888
889 static int ehea_poll(struct napi_struct *napi, int budget)
890 {
891 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
892 napi);
893 struct net_device *dev = pr->port->netdev;
894 struct ehea_cqe *cqe;
895 struct ehea_cqe *cqe_skb = NULL;
896 int wqe_index;
897 int rx = 0;
898
899 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
900 rx += ehea_proc_rwqes(dev, pr, budget - rx);
901
902 while (rx != budget) {
903 napi_complete(napi);
904 ehea_reset_cq_ep(pr->recv_cq);
905 ehea_reset_cq_ep(pr->send_cq);
906 ehea_reset_cq_n1(pr->recv_cq);
907 ehea_reset_cq_n1(pr->send_cq);
908 rmb();
909 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
910 cqe_skb = ehea_poll_cq(pr->send_cq);
911
912 if (!cqe && !cqe_skb)
913 return rx;
914
915 if (!napi_reschedule(napi))
916 return rx;
917
918 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
919 rx += ehea_proc_rwqes(dev, pr, budget - rx);
920 }
921
922 return rx;
923 }
924
925 #ifdef CONFIG_NET_POLL_CONTROLLER
926 static void ehea_netpoll(struct net_device *dev)
927 {
928 struct ehea_port *port = netdev_priv(dev);
929 int i;
930
931 for (i = 0; i < port->num_def_qps; i++)
932 napi_schedule(&port->port_res[i].napi);
933 }
934 #endif
935
936 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
937 {
938 struct ehea_port_res *pr = param;
939
940 napi_schedule(&pr->napi);
941
942 return IRQ_HANDLED;
943 }
944
945 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
946 {
947 struct ehea_port *port = param;
948 struct ehea_eqe *eqe;
949 struct ehea_qp *qp;
950 u32 qp_token;
951 u64 resource_type, aer, aerr;
952 int reset_port = 0;
953
954 eqe = ehea_poll_eq(port->qp_eq);
955
956 while (eqe) {
957 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
958 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
959 eqe->entry, qp_token);
960
961 qp = port->port_res[qp_token].qp;
962
963 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
964 &aer, &aerr);
965
966 if (resource_type == EHEA_AER_RESTYPE_QP) {
967 if ((aer & EHEA_AER_RESET_MASK) ||
968 (aerr & EHEA_AERR_RESET_MASK))
969 reset_port = 1;
970 } else
971 reset_port = 1; /* Reset in case of CQ or EQ error */
972
973 eqe = ehea_poll_eq(port->qp_eq);
974 }
975
976 if (reset_port) {
977 pr_err("Resetting port\n");
978 ehea_schedule_port_reset(port);
979 }
980
981 return IRQ_HANDLED;
982 }
983
984 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
985 int logical_port)
986 {
987 int i;
988
989 for (i = 0; i < EHEA_MAX_PORTS; i++)
990 if (adapter->port[i])
991 if (adapter->port[i]->logical_port_id == logical_port)
992 return adapter->port[i];
993 return NULL;
994 }
995
996 int ehea_sense_port_attr(struct ehea_port *port)
997 {
998 int ret;
999 u64 hret;
1000 struct hcp_ehea_port_cb0 *cb0;
1001
1002 /* may be called via ehea_neq_tasklet() */
1003 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1004 if (!cb0) {
1005 pr_err("no mem for cb0\n");
1006 ret = -ENOMEM;
1007 goto out;
1008 }
1009
1010 hret = ehea_h_query_ehea_port(port->adapter->handle,
1011 port->logical_port_id, H_PORT_CB0,
1012 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1013 cb0);
1014 if (hret != H_SUCCESS) {
1015 ret = -EIO;
1016 goto out_free;
1017 }
1018
1019 /* MAC address */
1020 port->mac_addr = cb0->port_mac_addr << 16;
1021
1022 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1023 ret = -EADDRNOTAVAIL;
1024 goto out_free;
1025 }
1026
1027 /* Port speed */
1028 switch (cb0->port_speed) {
1029 case H_SPEED_10M_H:
1030 port->port_speed = EHEA_SPEED_10M;
1031 port->full_duplex = 0;
1032 break;
1033 case H_SPEED_10M_F:
1034 port->port_speed = EHEA_SPEED_10M;
1035 port->full_duplex = 1;
1036 break;
1037 case H_SPEED_100M_H:
1038 port->port_speed = EHEA_SPEED_100M;
1039 port->full_duplex = 0;
1040 break;
1041 case H_SPEED_100M_F:
1042 port->port_speed = EHEA_SPEED_100M;
1043 port->full_duplex = 1;
1044 break;
1045 case H_SPEED_1G_F:
1046 port->port_speed = EHEA_SPEED_1G;
1047 port->full_duplex = 1;
1048 break;
1049 case H_SPEED_10G_F:
1050 port->port_speed = EHEA_SPEED_10G;
1051 port->full_duplex = 1;
1052 break;
1053 default:
1054 port->port_speed = 0;
1055 port->full_duplex = 0;
1056 break;
1057 }
1058
1059 port->autoneg = 1;
1060 port->num_mcs = cb0->num_default_qps;
1061
1062 /* Number of default QPs */
1063 if (use_mcs)
1064 port->num_def_qps = cb0->num_default_qps;
1065 else
1066 port->num_def_qps = 1;
1067
1068 if (!port->num_def_qps) {
1069 ret = -EINVAL;
1070 goto out_free;
1071 }
1072
1073 ret = 0;
1074 out_free:
1075 if (ret || netif_msg_probe(port))
1076 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1077 free_page((unsigned long)cb0);
1078 out:
1079 return ret;
1080 }
1081
1082 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1083 {
1084 struct hcp_ehea_port_cb4 *cb4;
1085 u64 hret;
1086 int ret = 0;
1087
1088 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1089 if (!cb4) {
1090 pr_err("no mem for cb4\n");
1091 ret = -ENOMEM;
1092 goto out;
1093 }
1094
1095 cb4->port_speed = port_speed;
1096
1097 netif_carrier_off(port->netdev);
1098
1099 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1100 port->logical_port_id,
1101 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1102 if (hret == H_SUCCESS) {
1103 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1104
1105 hret = ehea_h_query_ehea_port(port->adapter->handle,
1106 port->logical_port_id,
1107 H_PORT_CB4, H_PORT_CB4_SPEED,
1108 cb4);
1109 if (hret == H_SUCCESS) {
1110 switch (cb4->port_speed) {
1111 case H_SPEED_10M_H:
1112 port->port_speed = EHEA_SPEED_10M;
1113 port->full_duplex = 0;
1114 break;
1115 case H_SPEED_10M_F:
1116 port->port_speed = EHEA_SPEED_10M;
1117 port->full_duplex = 1;
1118 break;
1119 case H_SPEED_100M_H:
1120 port->port_speed = EHEA_SPEED_100M;
1121 port->full_duplex = 0;
1122 break;
1123 case H_SPEED_100M_F:
1124 port->port_speed = EHEA_SPEED_100M;
1125 port->full_duplex = 1;
1126 break;
1127 case H_SPEED_1G_F:
1128 port->port_speed = EHEA_SPEED_1G;
1129 port->full_duplex = 1;
1130 break;
1131 case H_SPEED_10G_F:
1132 port->port_speed = EHEA_SPEED_10G;
1133 port->full_duplex = 1;
1134 break;
1135 default:
1136 port->port_speed = 0;
1137 port->full_duplex = 0;
1138 break;
1139 }
1140 } else {
1141 pr_err("Failed sensing port speed\n");
1142 ret = -EIO;
1143 }
1144 } else {
1145 if (hret == H_AUTHORITY) {
1146 pr_info("Hypervisor denied setting port speed\n");
1147 ret = -EPERM;
1148 } else {
1149 ret = -EIO;
1150 pr_err("Failed setting port speed\n");
1151 }
1152 }
1153 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1154 netif_carrier_on(port->netdev);
1155
1156 free_page((unsigned long)cb4);
1157 out:
1158 return ret;
1159 }
1160
1161 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1162 {
1163 int ret;
1164 u8 ec;
1165 u8 portnum;
1166 struct ehea_port *port;
1167 struct net_device *dev;
1168
1169 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1170 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1171 port = ehea_get_port(adapter, portnum);
1172 dev = port->netdev;
1173
1174 switch (ec) {
1175 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1176
1177 if (!port) {
1178 netdev_err(dev, "unknown portnum %x\n", portnum);
1179 break;
1180 }
1181
1182 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1183 if (!netif_carrier_ok(dev)) {
1184 ret = ehea_sense_port_attr(port);
1185 if (ret) {
1186 netdev_err(dev, "failed resensing port attributes\n");
1187 break;
1188 }
1189
1190 netif_info(port, link, dev,
1191 "Logical port up: %dMbps %s Duplex\n",
1192 port->port_speed,
1193 port->full_duplex == 1 ?
1194 "Full" : "Half");
1195
1196 netif_carrier_on(dev);
1197 netif_wake_queue(dev);
1198 }
1199 } else
1200 if (netif_carrier_ok(dev)) {
1201 netif_info(port, link, dev,
1202 "Logical port down\n");
1203 netif_carrier_off(dev);
1204 netif_tx_disable(dev);
1205 }
1206
1207 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1208 port->phy_link = EHEA_PHY_LINK_UP;
1209 netif_info(port, link, dev,
1210 "Physical port up\n");
1211 if (prop_carrier_state)
1212 netif_carrier_on(dev);
1213 } else {
1214 port->phy_link = EHEA_PHY_LINK_DOWN;
1215 netif_info(port, link, dev,
1216 "Physical port down\n");
1217 if (prop_carrier_state)
1218 netif_carrier_off(dev);
1219 }
1220
1221 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1222 netdev_info(dev,
1223 "External switch port is primary port\n");
1224 else
1225 netdev_info(dev,
1226 "External switch port is backup port\n");
1227
1228 break;
1229 case EHEA_EC_ADAPTER_MALFUNC:
1230 netdev_err(dev, "Adapter malfunction\n");
1231 break;
1232 case EHEA_EC_PORT_MALFUNC:
1233 netdev_info(dev, "Port malfunction\n");
1234 netif_carrier_off(dev);
1235 netif_tx_disable(dev);
1236 break;
1237 default:
1238 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1239 break;
1240 }
1241 }
1242
1243 static void ehea_neq_tasklet(unsigned long data)
1244 {
1245 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1246 struct ehea_eqe *eqe;
1247 u64 event_mask;
1248
1249 eqe = ehea_poll_eq(adapter->neq);
1250 pr_debug("eqe=%p\n", eqe);
1251
1252 while (eqe) {
1253 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1254 ehea_parse_eqe(adapter, eqe->entry);
1255 eqe = ehea_poll_eq(adapter->neq);
1256 pr_debug("next eqe=%p\n", eqe);
1257 }
1258
1259 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1260 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1261 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1262
1263 ehea_h_reset_events(adapter->handle,
1264 adapter->neq->fw_handle, event_mask);
1265 }
1266
1267 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1268 {
1269 struct ehea_adapter *adapter = param;
1270 tasklet_hi_schedule(&adapter->neq_tasklet);
1271 return IRQ_HANDLED;
1272 }
1273
1274
1275 static int ehea_fill_port_res(struct ehea_port_res *pr)
1276 {
1277 int ret;
1278 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1279
1280 ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1281
1282 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1283
1284 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1285
1286 return ret;
1287 }
1288
1289 static int ehea_reg_interrupts(struct net_device *dev)
1290 {
1291 struct ehea_port *port = netdev_priv(dev);
1292 struct ehea_port_res *pr;
1293 int i, ret;
1294
1295
1296 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1297 dev->name);
1298
1299 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1300 ehea_qp_aff_irq_handler,
1301 0, port->int_aff_name, port);
1302 if (ret) {
1303 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1304 port->qp_eq->attr.ist1);
1305 goto out_free_qpeq;
1306 }
1307
1308 netif_info(port, ifup, dev,
1309 "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1310 port->qp_eq->attr.ist1);
1311
1312
1313 for (i = 0; i < port->num_def_qps; i++) {
1314 pr = &port->port_res[i];
1315 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1316 "%s-queue%d", dev->name, i);
1317 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1318 ehea_recv_irq_handler,
1319 0, pr->int_send_name, pr);
1320 if (ret) {
1321 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1322 i, pr->eq->attr.ist1);
1323 goto out_free_req;
1324 }
1325 netif_info(port, ifup, dev,
1326 "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1327 pr->eq->attr.ist1, i);
1328 }
1329 out:
1330 return ret;
1331
1332
1333 out_free_req:
1334 while (--i >= 0) {
1335 u32 ist = port->port_res[i].eq->attr.ist1;
1336 ibmebus_free_irq(ist, &port->port_res[i]);
1337 }
1338
1339 out_free_qpeq:
1340 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1341 i = port->num_def_qps;
1342
1343 goto out;
1344
1345 }
1346
1347 static void ehea_free_interrupts(struct net_device *dev)
1348 {
1349 struct ehea_port *port = netdev_priv(dev);
1350 struct ehea_port_res *pr;
1351 int i;
1352
1353 /* send */
1354
1355 for (i = 0; i < port->num_def_qps; i++) {
1356 pr = &port->port_res[i];
1357 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1358 netif_info(port, intr, dev,
1359 "free send irq for res %d with handle 0x%X\n",
1360 i, pr->eq->attr.ist1);
1361 }
1362
1363 /* associated events */
1364 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1365 netif_info(port, intr, dev,
1366 "associated event interrupt for handle 0x%X freed\n",
1367 port->qp_eq->attr.ist1);
1368 }
1369
1370 static int ehea_configure_port(struct ehea_port *port)
1371 {
1372 int ret, i;
1373 u64 hret, mask;
1374 struct hcp_ehea_port_cb0 *cb0;
1375
1376 ret = -ENOMEM;
1377 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1378 if (!cb0)
1379 goto out;
1380
1381 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1382 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1383 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1384 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1385 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1386 PXLY_RC_VLAN_FILTER)
1387 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1388
1389 for (i = 0; i < port->num_mcs; i++)
1390 if (use_mcs)
1391 cb0->default_qpn_arr[i] =
1392 port->port_res[i].qp->init_attr.qp_nr;
1393 else
1394 cb0->default_qpn_arr[i] =
1395 port->port_res[0].qp->init_attr.qp_nr;
1396
1397 if (netif_msg_ifup(port))
1398 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1399
1400 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1401 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1402
1403 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1404 port->logical_port_id,
1405 H_PORT_CB0, mask, cb0);
1406 ret = -EIO;
1407 if (hret != H_SUCCESS)
1408 goto out_free;
1409
1410 ret = 0;
1411
1412 out_free:
1413 free_page((unsigned long)cb0);
1414 out:
1415 return ret;
1416 }
1417
1418 static int ehea_gen_smrs(struct ehea_port_res *pr)
1419 {
1420 int ret;
1421 struct ehea_adapter *adapter = pr->port->adapter;
1422
1423 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1424 if (ret)
1425 goto out;
1426
1427 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1428 if (ret)
1429 goto out_free;
1430
1431 return 0;
1432
1433 out_free:
1434 ehea_rem_mr(&pr->send_mr);
1435 out:
1436 pr_err("Generating SMRS failed\n");
1437 return -EIO;
1438 }
1439
1440 static int ehea_rem_smrs(struct ehea_port_res *pr)
1441 {
1442 if ((ehea_rem_mr(&pr->send_mr)) ||
1443 (ehea_rem_mr(&pr->recv_mr)))
1444 return -EIO;
1445 else
1446 return 0;
1447 }
1448
1449 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1450 {
1451 int arr_size = sizeof(void *) * max_q_entries;
1452
1453 q_skba->arr = vzalloc(arr_size);
1454 if (!q_skba->arr)
1455 return -ENOMEM;
1456
1457 q_skba->len = max_q_entries;
1458 q_skba->index = 0;
1459 q_skba->os_skbs = 0;
1460
1461 return 0;
1462 }
1463
1464 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1465 struct port_res_cfg *pr_cfg, int queue_token)
1466 {
1467 struct ehea_adapter *adapter = port->adapter;
1468 enum ehea_eq_type eq_type = EHEA_EQ;
1469 struct ehea_qp_init_attr *init_attr = NULL;
1470 int ret = -EIO;
1471 u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1472
1473 tx_bytes = pr->tx_bytes;
1474 tx_packets = pr->tx_packets;
1475 rx_bytes = pr->rx_bytes;
1476 rx_packets = pr->rx_packets;
1477
1478 memset(pr, 0, sizeof(struct ehea_port_res));
1479
1480 pr->tx_bytes = rx_bytes;
1481 pr->tx_packets = tx_packets;
1482 pr->rx_bytes = rx_bytes;
1483 pr->rx_packets = rx_packets;
1484
1485 pr->port = port;
1486
1487 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1488 if (!pr->eq) {
1489 pr_err("create_eq failed (eq)\n");
1490 goto out_free;
1491 }
1492
1493 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1494 pr->eq->fw_handle,
1495 port->logical_port_id);
1496 if (!pr->recv_cq) {
1497 pr_err("create_cq failed (cq_recv)\n");
1498 goto out_free;
1499 }
1500
1501 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1502 pr->eq->fw_handle,
1503 port->logical_port_id);
1504 if (!pr->send_cq) {
1505 pr_err("create_cq failed (cq_send)\n");
1506 goto out_free;
1507 }
1508
1509 if (netif_msg_ifup(port))
1510 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1511 pr->send_cq->attr.act_nr_of_cqes,
1512 pr->recv_cq->attr.act_nr_of_cqes);
1513
1514 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1515 if (!init_attr) {
1516 ret = -ENOMEM;
1517 pr_err("no mem for ehea_qp_init_attr\n");
1518 goto out_free;
1519 }
1520
1521 init_attr->low_lat_rq1 = 1;
1522 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1523 init_attr->rq_count = 3;
1524 init_attr->qp_token = queue_token;
1525 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1526 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1527 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1528 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1529 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1530 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1531 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1532 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1533 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1534 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1535 init_attr->port_nr = port->logical_port_id;
1536 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1537 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1538 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1539
1540 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1541 if (!pr->qp) {
1542 pr_err("create_qp failed\n");
1543 ret = -EIO;
1544 goto out_free;
1545 }
1546
1547 if (netif_msg_ifup(port))
1548 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",
1549 init_attr->qp_nr,
1550 init_attr->act_nr_send_wqes,
1551 init_attr->act_nr_rwqes_rq1,
1552 init_attr->act_nr_rwqes_rq2,
1553 init_attr->act_nr_rwqes_rq3);
1554
1555 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1556
1557 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1558 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1559 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1560 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1561 if (ret)
1562 goto out_free;
1563
1564 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1565 if (ehea_gen_smrs(pr) != 0) {
1566 ret = -EIO;
1567 goto out_free;
1568 }
1569
1570 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1571
1572 kfree(init_attr);
1573
1574 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1575
1576 ret = 0;
1577 goto out;
1578
1579 out_free:
1580 kfree(init_attr);
1581 vfree(pr->sq_skba.arr);
1582 vfree(pr->rq1_skba.arr);
1583 vfree(pr->rq2_skba.arr);
1584 vfree(pr->rq3_skba.arr);
1585 ehea_destroy_qp(pr->qp);
1586 ehea_destroy_cq(pr->send_cq);
1587 ehea_destroy_cq(pr->recv_cq);
1588 ehea_destroy_eq(pr->eq);
1589 out:
1590 return ret;
1591 }
1592
1593 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1594 {
1595 int ret, i;
1596
1597 if (pr->qp)
1598 netif_napi_del(&pr->napi);
1599
1600 ret = ehea_destroy_qp(pr->qp);
1601
1602 if (!ret) {
1603 ehea_destroy_cq(pr->send_cq);
1604 ehea_destroy_cq(pr->recv_cq);
1605 ehea_destroy_eq(pr->eq);
1606
1607 for (i = 0; i < pr->rq1_skba.len; i++)
1608 if (pr->rq1_skba.arr[i])
1609 dev_kfree_skb(pr->rq1_skba.arr[i]);
1610
1611 for (i = 0; i < pr->rq2_skba.len; i++)
1612 if (pr->rq2_skba.arr[i])
1613 dev_kfree_skb(pr->rq2_skba.arr[i]);
1614
1615 for (i = 0; i < pr->rq3_skba.len; i++)
1616 if (pr->rq3_skba.arr[i])
1617 dev_kfree_skb(pr->rq3_skba.arr[i]);
1618
1619 for (i = 0; i < pr->sq_skba.len; i++)
1620 if (pr->sq_skba.arr[i])
1621 dev_kfree_skb(pr->sq_skba.arr[i]);
1622
1623 vfree(pr->rq1_skba.arr);
1624 vfree(pr->rq2_skba.arr);
1625 vfree(pr->rq3_skba.arr);
1626 vfree(pr->sq_skba.arr);
1627 ret = ehea_rem_smrs(pr);
1628 }
1629 return ret;
1630 }
1631
1632 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1633 u32 lkey)
1634 {
1635 int skb_data_size = skb_headlen(skb);
1636 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1637 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1638 unsigned int immediate_len = SWQE2_MAX_IMM;
1639
1640 swqe->descriptors = 0;
1641
1642 if (skb_is_gso(skb)) {
1643 swqe->tx_control |= EHEA_SWQE_TSO;
1644 swqe->mss = skb_shinfo(skb)->gso_size;
1645 /*
1646 * For TSO packets we only copy the headers into the
1647 * immediate area.
1648 */
1649 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1650 }
1651
1652 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1653 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1654 swqe->immediate_data_length = immediate_len;
1655
1656 if (skb_data_size > immediate_len) {
1657 sg1entry->l_key = lkey;
1658 sg1entry->len = skb_data_size - immediate_len;
1659 sg1entry->vaddr =
1660 ehea_map_vaddr(skb->data + immediate_len);
1661 swqe->descriptors++;
1662 }
1663 } else {
1664 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1665 swqe->immediate_data_length = skb_data_size;
1666 }
1667 }
1668
1669 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1670 struct ehea_swqe *swqe, u32 lkey)
1671 {
1672 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1673 skb_frag_t *frag;
1674 int nfrags, sg1entry_contains_frag_data, i;
1675
1676 nfrags = skb_shinfo(skb)->nr_frags;
1677 sg1entry = &swqe->u.immdata_desc.sg_entry;
1678 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1679 sg1entry_contains_frag_data = 0;
1680
1681 write_swqe2_immediate(skb, swqe, lkey);
1682
1683 /* write descriptors */
1684 if (nfrags > 0) {
1685 if (swqe->descriptors == 0) {
1686 /* sg1entry not yet used */
1687 frag = &skb_shinfo(skb)->frags[0];
1688
1689 /* copy sg1entry data */
1690 sg1entry->l_key = lkey;
1691 sg1entry->len = skb_frag_size(frag);
1692 sg1entry->vaddr =
1693 ehea_map_vaddr(skb_frag_address(frag));
1694 swqe->descriptors++;
1695 sg1entry_contains_frag_data = 1;
1696 }
1697
1698 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1699
1700 frag = &skb_shinfo(skb)->frags[i];
1701 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1702
1703 sgentry->l_key = lkey;
1704 sgentry->len = skb_frag_size(frag);
1705 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1706 swqe->descriptors++;
1707 }
1708 }
1709 }
1710
1711 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1712 {
1713 int ret = 0;
1714 u64 hret;
1715 u8 reg_type;
1716
1717 /* De/Register untagged packets */
1718 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1719 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1720 port->logical_port_id,
1721 reg_type, port->mac_addr, 0, hcallid);
1722 if (hret != H_SUCCESS) {
1723 pr_err("%sregistering bc address failed (tagged)\n",
1724 hcallid == H_REG_BCMC ? "" : "de");
1725 ret = -EIO;
1726 goto out_herr;
1727 }
1728
1729 /* De/Register VLAN packets */
1730 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1731 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1732 port->logical_port_id,
1733 reg_type, port->mac_addr, 0, hcallid);
1734 if (hret != H_SUCCESS) {
1735 pr_err("%sregistering bc address failed (vlan)\n",
1736 hcallid == H_REG_BCMC ? "" : "de");
1737 ret = -EIO;
1738 }
1739 out_herr:
1740 return ret;
1741 }
1742
1743 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1744 {
1745 struct ehea_port *port = netdev_priv(dev);
1746 struct sockaddr *mac_addr = sa;
1747 struct hcp_ehea_port_cb0 *cb0;
1748 int ret;
1749 u64 hret;
1750
1751 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1752 ret = -EADDRNOTAVAIL;
1753 goto out;
1754 }
1755
1756 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1757 if (!cb0) {
1758 pr_err("no mem for cb0\n");
1759 ret = -ENOMEM;
1760 goto out;
1761 }
1762
1763 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1764
1765 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1766
1767 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1768 port->logical_port_id, H_PORT_CB0,
1769 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1770 if (hret != H_SUCCESS) {
1771 ret = -EIO;
1772 goto out_free;
1773 }
1774
1775 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1776
1777 /* Deregister old MAC in pHYP */
1778 if (port->state == EHEA_PORT_UP) {
1779 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1780 if (ret)
1781 goto out_upregs;
1782 }
1783
1784 port->mac_addr = cb0->port_mac_addr << 16;
1785
1786 /* Register new MAC in pHYP */
1787 if (port->state == EHEA_PORT_UP) {
1788 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1789 if (ret)
1790 goto out_upregs;
1791 }
1792
1793 ret = 0;
1794
1795 out_upregs:
1796 ehea_update_bcmc_registrations();
1797 out_free:
1798 free_page((unsigned long)cb0);
1799 out:
1800 return ret;
1801 }
1802
1803 static void ehea_promiscuous_error(u64 hret, int enable)
1804 {
1805 if (hret == H_AUTHORITY)
1806 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1807 enable == 1 ? "en" : "dis");
1808 else
1809 pr_err("failed %sabling promiscuous mode\n",
1810 enable == 1 ? "en" : "dis");
1811 }
1812
1813 static void ehea_promiscuous(struct net_device *dev, int enable)
1814 {
1815 struct ehea_port *port = netdev_priv(dev);
1816 struct hcp_ehea_port_cb7 *cb7;
1817 u64 hret;
1818
1819 if (enable == port->promisc)
1820 return;
1821
1822 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1823 if (!cb7) {
1824 pr_err("no mem for cb7\n");
1825 goto out;
1826 }
1827
1828 /* Modify Pxs_DUCQPN in CB7 */
1829 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1830
1831 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1832 port->logical_port_id,
1833 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1834 if (hret) {
1835 ehea_promiscuous_error(hret, enable);
1836 goto out;
1837 }
1838
1839 port->promisc = enable;
1840 out:
1841 free_page((unsigned long)cb7);
1842 }
1843
1844 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1845 u32 hcallid)
1846 {
1847 u64 hret;
1848 u8 reg_type;
1849
1850 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1851 if (mc_mac_addr == 0)
1852 reg_type |= EHEA_BCMC_SCOPE_ALL;
1853
1854 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1855 port->logical_port_id,
1856 reg_type, mc_mac_addr, 0, hcallid);
1857 if (hret)
1858 goto out;
1859
1860 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1861 if (mc_mac_addr == 0)
1862 reg_type |= EHEA_BCMC_SCOPE_ALL;
1863
1864 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1865 port->logical_port_id,
1866 reg_type, mc_mac_addr, 0, hcallid);
1867 out:
1868 return hret;
1869 }
1870
1871 static int ehea_drop_multicast_list(struct net_device *dev)
1872 {
1873 struct ehea_port *port = netdev_priv(dev);
1874 struct ehea_mc_list *mc_entry = port->mc_list;
1875 struct list_head *pos;
1876 struct list_head *temp;
1877 int ret = 0;
1878 u64 hret;
1879
1880 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1881 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1882
1883 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1884 H_DEREG_BCMC);
1885 if (hret) {
1886 pr_err("failed deregistering mcast MAC\n");
1887 ret = -EIO;
1888 }
1889
1890 list_del(pos);
1891 kfree(mc_entry);
1892 }
1893 return ret;
1894 }
1895
1896 static void ehea_allmulti(struct net_device *dev, int enable)
1897 {
1898 struct ehea_port *port = netdev_priv(dev);
1899 u64 hret;
1900
1901 if (!port->allmulti) {
1902 if (enable) {
1903 /* Enable ALLMULTI */
1904 ehea_drop_multicast_list(dev);
1905 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1906 if (!hret)
1907 port->allmulti = 1;
1908 else
1909 netdev_err(dev,
1910 "failed enabling IFF_ALLMULTI\n");
1911 }
1912 } else {
1913 if (!enable) {
1914 /* Disable ALLMULTI */
1915 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1916 if (!hret)
1917 port->allmulti = 0;
1918 else
1919 netdev_err(dev,
1920 "failed disabling IFF_ALLMULTI\n");
1921 }
1922 }
1923 }
1924
1925 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1926 {
1927 struct ehea_mc_list *ehea_mcl_entry;
1928 u64 hret;
1929
1930 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1931 if (!ehea_mcl_entry)
1932 return;
1933
1934 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1935
1936 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1937
1938 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1939 H_REG_BCMC);
1940 if (!hret)
1941 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1942 else {
1943 pr_err("failed registering mcast MAC\n");
1944 kfree(ehea_mcl_entry);
1945 }
1946 }
1947
1948 static void ehea_set_multicast_list(struct net_device *dev)
1949 {
1950 struct ehea_port *port = netdev_priv(dev);
1951 struct netdev_hw_addr *ha;
1952 int ret;
1953
1954 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1955
1956 if (dev->flags & IFF_ALLMULTI) {
1957 ehea_allmulti(dev, 1);
1958 goto out;
1959 }
1960 ehea_allmulti(dev, 0);
1961
1962 if (!netdev_mc_empty(dev)) {
1963 ret = ehea_drop_multicast_list(dev);
1964 if (ret) {
1965 /* Dropping the current multicast list failed.
1966 * Enabling ALL_MULTI is the best we can do.
1967 */
1968 ehea_allmulti(dev, 1);
1969 }
1970
1971 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1972 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1973 port->adapter->max_mc_mac);
1974 goto out;
1975 }
1976
1977 netdev_for_each_mc_addr(ha, dev)
1978 ehea_add_multicast_entry(port, ha->addr);
1979
1980 }
1981 out:
1982 ehea_update_bcmc_registrations();
1983 }
1984
1985 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1986 {
1987 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1988 return -EINVAL;
1989 dev->mtu = new_mtu;
1990 return 0;
1991 }
1992
1993 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1994 {
1995 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1996
1997 if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1998 return;
1999
2000 if (skb->ip_summed == CHECKSUM_PARTIAL)
2001 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
2002
2003 swqe->ip_start = skb_network_offset(skb);
2004 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
2005
2006 switch (ip_hdr(skb)->protocol) {
2007 case IPPROTO_UDP:
2008 if (skb->ip_summed == CHECKSUM_PARTIAL)
2009 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2010
2011 swqe->tcp_offset = swqe->ip_end + 1 +
2012 offsetof(struct udphdr, check);
2013 break;
2014
2015 case IPPROTO_TCP:
2016 if (skb->ip_summed == CHECKSUM_PARTIAL)
2017 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2018
2019 swqe->tcp_offset = swqe->ip_end + 1 +
2020 offsetof(struct tcphdr, check);
2021 break;
2022 }
2023 }
2024
2025 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2026 struct ehea_swqe *swqe, u32 lkey)
2027 {
2028 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2029
2030 xmit_common(skb, swqe);
2031
2032 write_swqe2_data(skb, dev, swqe, lkey);
2033 }
2034
2035 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2036 struct ehea_swqe *swqe)
2037 {
2038 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2039
2040 xmit_common(skb, swqe);
2041
2042 if (!skb->data_len)
2043 skb_copy_from_linear_data(skb, imm_data, skb->len);
2044 else
2045 skb_copy_bits(skb, 0, imm_data, skb->len);
2046
2047 swqe->immediate_data_length = skb->len;
2048 dev_consume_skb_any(skb);
2049 }
2050
2051 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2052 {
2053 struct ehea_port *port = netdev_priv(dev);
2054 struct ehea_swqe *swqe;
2055 u32 lkey;
2056 int swqe_index;
2057 struct ehea_port_res *pr;
2058 struct netdev_queue *txq;
2059
2060 pr = &port->port_res[skb_get_queue_mapping(skb)];
2061 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2062
2063 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2064 memset(swqe, 0, SWQE_HEADER_SIZE);
2065 atomic_dec(&pr->swqe_avail);
2066
2067 if (skb_vlan_tag_present(skb)) {
2068 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2069 swqe->vlan_tag = skb_vlan_tag_get(skb);
2070 }
2071
2072 pr->tx_packets++;
2073 pr->tx_bytes += skb->len;
2074
2075 if (skb->len <= SWQE3_MAX_IMM) {
2076 u32 sig_iv = port->sig_comp_iv;
2077 u32 swqe_num = pr->swqe_id_counter;
2078 ehea_xmit3(skb, dev, swqe);
2079 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2080 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2081 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2082 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2083 sig_iv);
2084 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2085 pr->swqe_ll_count = 0;
2086 } else
2087 pr->swqe_ll_count += 1;
2088 } else {
2089 swqe->wr_id =
2090 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2091 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2092 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2093 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2094 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2095
2096 pr->sq_skba.index++;
2097 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2098
2099 lkey = pr->send_mr.lkey;
2100 ehea_xmit2(skb, dev, swqe, lkey);
2101 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2102 }
2103 pr->swqe_id_counter += 1;
2104
2105 netif_info(port, tx_queued, dev,
2106 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2107 if (netif_msg_tx_queued(port))
2108 ehea_dump(swqe, 512, "swqe");
2109
2110 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2111 netif_tx_stop_queue(txq);
2112 swqe->tx_control |= EHEA_SWQE_PURGE;
2113 }
2114
2115 ehea_post_swqe(pr->qp, swqe);
2116
2117 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2118 pr->p_stats.queue_stopped++;
2119 netif_tx_stop_queue(txq);
2120 }
2121
2122 return NETDEV_TX_OK;
2123 }
2124
2125 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2126 {
2127 struct ehea_port *port = netdev_priv(dev);
2128 struct ehea_adapter *adapter = port->adapter;
2129 struct hcp_ehea_port_cb1 *cb1;
2130 int index;
2131 u64 hret;
2132 int err = 0;
2133
2134 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2135 if (!cb1) {
2136 pr_err("no mem for cb1\n");
2137 err = -ENOMEM;
2138 goto out;
2139 }
2140
2141 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2142 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2143 if (hret != H_SUCCESS) {
2144 pr_err("query_ehea_port failed\n");
2145 err = -EINVAL;
2146 goto out;
2147 }
2148
2149 index = (vid / 64);
2150 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2151
2152 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2153 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2154 if (hret != H_SUCCESS) {
2155 pr_err("modify_ehea_port failed\n");
2156 err = -EINVAL;
2157 }
2158 out:
2159 free_page((unsigned long)cb1);
2160 return err;
2161 }
2162
2163 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2164 {
2165 struct ehea_port *port = netdev_priv(dev);
2166 struct ehea_adapter *adapter = port->adapter;
2167 struct hcp_ehea_port_cb1 *cb1;
2168 int index;
2169 u64 hret;
2170 int err = 0;
2171
2172 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2173 if (!cb1) {
2174 pr_err("no mem for cb1\n");
2175 err = -ENOMEM;
2176 goto out;
2177 }
2178
2179 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2180 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2181 if (hret != H_SUCCESS) {
2182 pr_err("query_ehea_port failed\n");
2183 err = -EINVAL;
2184 goto out;
2185 }
2186
2187 index = (vid / 64);
2188 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2189
2190 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2191 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2192 if (hret != H_SUCCESS) {
2193 pr_err("modify_ehea_port failed\n");
2194 err = -EINVAL;
2195 }
2196 out:
2197 free_page((unsigned long)cb1);
2198 return err;
2199 }
2200
2201 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2202 {
2203 int ret = -EIO;
2204 u64 hret;
2205 u16 dummy16 = 0;
2206 u64 dummy64 = 0;
2207 struct hcp_modify_qp_cb0 *cb0;
2208
2209 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2210 if (!cb0) {
2211 ret = -ENOMEM;
2212 goto out;
2213 }
2214
2215 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2216 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2217 if (hret != H_SUCCESS) {
2218 pr_err("query_ehea_qp failed (1)\n");
2219 goto out;
2220 }
2221
2222 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2223 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2224 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2225 &dummy64, &dummy64, &dummy16, &dummy16);
2226 if (hret != H_SUCCESS) {
2227 pr_err("modify_ehea_qp failed (1)\n");
2228 goto out;
2229 }
2230
2231 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2232 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2233 if (hret != H_SUCCESS) {
2234 pr_err("query_ehea_qp failed (2)\n");
2235 goto out;
2236 }
2237
2238 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2239 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2240 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2241 &dummy64, &dummy64, &dummy16, &dummy16);
2242 if (hret != H_SUCCESS) {
2243 pr_err("modify_ehea_qp failed (2)\n");
2244 goto out;
2245 }
2246
2247 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2248 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2249 if (hret != H_SUCCESS) {
2250 pr_err("query_ehea_qp failed (3)\n");
2251 goto out;
2252 }
2253
2254 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2255 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2256 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2257 &dummy64, &dummy64, &dummy16, &dummy16);
2258 if (hret != H_SUCCESS) {
2259 pr_err("modify_ehea_qp failed (3)\n");
2260 goto out;
2261 }
2262
2263 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2264 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2265 if (hret != H_SUCCESS) {
2266 pr_err("query_ehea_qp failed (4)\n");
2267 goto out;
2268 }
2269
2270 ret = 0;
2271 out:
2272 free_page((unsigned long)cb0);
2273 return ret;
2274 }
2275
2276 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2277 {
2278 int ret, i;
2279 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2280 enum ehea_eq_type eq_type = EHEA_EQ;
2281
2282 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2283 EHEA_MAX_ENTRIES_EQ, 1);
2284 if (!port->qp_eq) {
2285 ret = -EINVAL;
2286 pr_err("ehea_create_eq failed (qp_eq)\n");
2287 goto out_kill_eq;
2288 }
2289
2290 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2291 pr_cfg.max_entries_scq = sq_entries * 2;
2292 pr_cfg.max_entries_sq = sq_entries;
2293 pr_cfg.max_entries_rq1 = rq1_entries;
2294 pr_cfg.max_entries_rq2 = rq2_entries;
2295 pr_cfg.max_entries_rq3 = rq3_entries;
2296
2297 pr_cfg_small_rx.max_entries_rcq = 1;
2298 pr_cfg_small_rx.max_entries_scq = sq_entries;
2299 pr_cfg_small_rx.max_entries_sq = sq_entries;
2300 pr_cfg_small_rx.max_entries_rq1 = 1;
2301 pr_cfg_small_rx.max_entries_rq2 = 1;
2302 pr_cfg_small_rx.max_entries_rq3 = 1;
2303
2304 for (i = 0; i < def_qps; i++) {
2305 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2306 if (ret)
2307 goto out_clean_pr;
2308 }
2309 for (i = def_qps; i < def_qps; i++) {
2310 ret = ehea_init_port_res(port, &port->port_res[i],
2311 &pr_cfg_small_rx, i);
2312 if (ret)
2313 goto out_clean_pr;
2314 }
2315
2316 return 0;
2317
2318 out_clean_pr:
2319 while (--i >= 0)
2320 ehea_clean_portres(port, &port->port_res[i]);
2321
2322 out_kill_eq:
2323 ehea_destroy_eq(port->qp_eq);
2324 return ret;
2325 }
2326
2327 static int ehea_clean_all_portres(struct ehea_port *port)
2328 {
2329 int ret = 0;
2330 int i;
2331
2332 for (i = 0; i < port->num_def_qps; i++)
2333 ret |= ehea_clean_portres(port, &port->port_res[i]);
2334
2335 ret |= ehea_destroy_eq(port->qp_eq);
2336
2337 return ret;
2338 }
2339
2340 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2341 {
2342 if (adapter->active_ports)
2343 return;
2344
2345 ehea_rem_mr(&adapter->mr);
2346 }
2347
2348 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2349 {
2350 if (adapter->active_ports)
2351 return 0;
2352
2353 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2354 }
2355
2356 static int ehea_up(struct net_device *dev)
2357 {
2358 int ret, i;
2359 struct ehea_port *port = netdev_priv(dev);
2360
2361 if (port->state == EHEA_PORT_UP)
2362 return 0;
2363
2364 ret = ehea_port_res_setup(port, port->num_def_qps);
2365 if (ret) {
2366 netdev_err(dev, "port_res_failed\n");
2367 goto out;
2368 }
2369
2370 /* Set default QP for this port */
2371 ret = ehea_configure_port(port);
2372 if (ret) {
2373 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2374 goto out_clean_pr;
2375 }
2376
2377 ret = ehea_reg_interrupts(dev);
2378 if (ret) {
2379 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2380 goto out_clean_pr;
2381 }
2382
2383 for (i = 0; i < port->num_def_qps; i++) {
2384 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2385 if (ret) {
2386 netdev_err(dev, "activate_qp failed\n");
2387 goto out_free_irqs;
2388 }
2389 }
2390
2391 for (i = 0; i < port->num_def_qps; i++) {
2392 ret = ehea_fill_port_res(&port->port_res[i]);
2393 if (ret) {
2394 netdev_err(dev, "out_free_irqs\n");
2395 goto out_free_irqs;
2396 }
2397 }
2398
2399 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2400 if (ret) {
2401 ret = -EIO;
2402 goto out_free_irqs;
2403 }
2404
2405 port->state = EHEA_PORT_UP;
2406
2407 ret = 0;
2408 goto out;
2409
2410 out_free_irqs:
2411 ehea_free_interrupts(dev);
2412
2413 out_clean_pr:
2414 ehea_clean_all_portres(port);
2415 out:
2416 if (ret)
2417 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2418
2419 ehea_update_bcmc_registrations();
2420 ehea_update_firmware_handles();
2421
2422 return ret;
2423 }
2424
2425 static void port_napi_disable(struct ehea_port *port)
2426 {
2427 int i;
2428
2429 for (i = 0; i < port->num_def_qps; i++)
2430 napi_disable(&port->port_res[i].napi);
2431 }
2432
2433 static void port_napi_enable(struct ehea_port *port)
2434 {
2435 int i;
2436
2437 for (i = 0; i < port->num_def_qps; i++)
2438 napi_enable(&port->port_res[i].napi);
2439 }
2440
2441 static int ehea_open(struct net_device *dev)
2442 {
2443 int ret;
2444 struct ehea_port *port = netdev_priv(dev);
2445
2446 mutex_lock(&port->port_lock);
2447
2448 netif_info(port, ifup, dev, "enabling port\n");
2449
2450 ret = ehea_up(dev);
2451 if (!ret) {
2452 port_napi_enable(port);
2453 netif_tx_start_all_queues(dev);
2454 }
2455
2456 mutex_unlock(&port->port_lock);
2457 schedule_delayed_work(&port->stats_work,
2458 round_jiffies_relative(msecs_to_jiffies(1000)));
2459
2460 return ret;
2461 }
2462
2463 static int ehea_down(struct net_device *dev)
2464 {
2465 int ret;
2466 struct ehea_port *port = netdev_priv(dev);
2467
2468 if (port->state == EHEA_PORT_DOWN)
2469 return 0;
2470
2471 ehea_drop_multicast_list(dev);
2472 ehea_allmulti(dev, 0);
2473 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2474
2475 ehea_free_interrupts(dev);
2476
2477 port->state = EHEA_PORT_DOWN;
2478
2479 ehea_update_bcmc_registrations();
2480
2481 ret = ehea_clean_all_portres(port);
2482 if (ret)
2483 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2484
2485 ehea_update_firmware_handles();
2486
2487 return ret;
2488 }
2489
2490 static int ehea_stop(struct net_device *dev)
2491 {
2492 int ret;
2493 struct ehea_port *port = netdev_priv(dev);
2494
2495 netif_info(port, ifdown, dev, "disabling port\n");
2496
2497 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2498 cancel_work_sync(&port->reset_task);
2499 cancel_delayed_work_sync(&port->stats_work);
2500 mutex_lock(&port->port_lock);
2501 netif_tx_stop_all_queues(dev);
2502 port_napi_disable(port);
2503 ret = ehea_down(dev);
2504 mutex_unlock(&port->port_lock);
2505 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2506 return ret;
2507 }
2508
2509 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2510 {
2511 struct ehea_qp qp = *orig_qp;
2512 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2513 struct ehea_swqe *swqe;
2514 int wqe_index;
2515 int i;
2516
2517 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2518 swqe = ehea_get_swqe(&qp, &wqe_index);
2519 swqe->tx_control |= EHEA_SWQE_PURGE;
2520 }
2521 }
2522
2523 static void ehea_flush_sq(struct ehea_port *port)
2524 {
2525 int i;
2526
2527 for (i = 0; i < port->num_def_qps; i++) {
2528 struct ehea_port_res *pr = &port->port_res[i];
2529 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2530 int ret;
2531
2532 ret = wait_event_timeout(port->swqe_avail_wq,
2533 atomic_read(&pr->swqe_avail) >= swqe_max,
2534 msecs_to_jiffies(100));
2535
2536 if (!ret) {
2537 pr_err("WARNING: sq not flushed completely\n");
2538 break;
2539 }
2540 }
2541 }
2542
2543 static int ehea_stop_qps(struct net_device *dev)
2544 {
2545 struct ehea_port *port = netdev_priv(dev);
2546 struct ehea_adapter *adapter = port->adapter;
2547 struct hcp_modify_qp_cb0 *cb0;
2548 int ret = -EIO;
2549 int dret;
2550 int i;
2551 u64 hret;
2552 u64 dummy64 = 0;
2553 u16 dummy16 = 0;
2554
2555 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2556 if (!cb0) {
2557 ret = -ENOMEM;
2558 goto out;
2559 }
2560
2561 for (i = 0; i < (port->num_def_qps); i++) {
2562 struct ehea_port_res *pr = &port->port_res[i];
2563 struct ehea_qp *qp = pr->qp;
2564
2565 /* Purge send queue */
2566 ehea_purge_sq(qp);
2567
2568 /* Disable queue pair */
2569 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2570 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2571 cb0);
2572 if (hret != H_SUCCESS) {
2573 pr_err("query_ehea_qp failed (1)\n");
2574 goto out;
2575 }
2576
2577 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2578 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2579
2580 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2581 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2582 1), cb0, &dummy64,
2583 &dummy64, &dummy16, &dummy16);
2584 if (hret != H_SUCCESS) {
2585 pr_err("modify_ehea_qp failed (1)\n");
2586 goto out;
2587 }
2588
2589 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2590 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2591 cb0);
2592 if (hret != H_SUCCESS) {
2593 pr_err("query_ehea_qp failed (2)\n");
2594 goto out;
2595 }
2596
2597 /* deregister shared memory regions */
2598 dret = ehea_rem_smrs(pr);
2599 if (dret) {
2600 pr_err("unreg shared memory region failed\n");
2601 goto out;
2602 }
2603 }
2604
2605 ret = 0;
2606 out:
2607 free_page((unsigned long)cb0);
2608
2609 return ret;
2610 }
2611
2612 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2613 {
2614 struct ehea_qp qp = *orig_qp;
2615 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2616 struct ehea_rwqe *rwqe;
2617 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2618 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2619 struct sk_buff *skb;
2620 u32 lkey = pr->recv_mr.lkey;
2621
2622
2623 int i;
2624 int index;
2625
2626 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2627 rwqe = ehea_get_next_rwqe(&qp, 2);
2628 rwqe->sg_list[0].l_key = lkey;
2629 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2630 skb = skba_rq2[index];
2631 if (skb)
2632 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2633 }
2634
2635 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2636 rwqe = ehea_get_next_rwqe(&qp, 3);
2637 rwqe->sg_list[0].l_key = lkey;
2638 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2639 skb = skba_rq3[index];
2640 if (skb)
2641 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2642 }
2643 }
2644
2645 static int ehea_restart_qps(struct net_device *dev)
2646 {
2647 struct ehea_port *port = netdev_priv(dev);
2648 struct ehea_adapter *adapter = port->adapter;
2649 int ret = 0;
2650 int i;
2651
2652 struct hcp_modify_qp_cb0 *cb0;
2653 u64 hret;
2654 u64 dummy64 = 0;
2655 u16 dummy16 = 0;
2656
2657 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2658 if (!cb0) {
2659 ret = -ENOMEM;
2660 goto out;
2661 }
2662
2663 for (i = 0; i < (port->num_def_qps); i++) {
2664 struct ehea_port_res *pr = &port->port_res[i];
2665 struct ehea_qp *qp = pr->qp;
2666
2667 ret = ehea_gen_smrs(pr);
2668 if (ret) {
2669 netdev_err(dev, "creation of shared memory regions failed\n");
2670 goto out;
2671 }
2672
2673 ehea_update_rqs(qp, pr);
2674
2675 /* Enable queue pair */
2676 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2677 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2678 cb0);
2679 if (hret != H_SUCCESS) {
2680 netdev_err(dev, "query_ehea_qp failed (1)\n");
2681 goto out;
2682 }
2683
2684 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2685 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2686
2687 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2688 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2689 1), cb0, &dummy64,
2690 &dummy64, &dummy16, &dummy16);
2691 if (hret != H_SUCCESS) {
2692 netdev_err(dev, "modify_ehea_qp failed (1)\n");
2693 goto out;
2694 }
2695
2696 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2697 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2698 cb0);
2699 if (hret != H_SUCCESS) {
2700 netdev_err(dev, "query_ehea_qp failed (2)\n");
2701 goto out;
2702 }
2703
2704 /* refill entire queue */
2705 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2706 ehea_refill_rq2(pr, 0);
2707 ehea_refill_rq3(pr, 0);
2708 }
2709 out:
2710 free_page((unsigned long)cb0);
2711
2712 return ret;
2713 }
2714
2715 static void ehea_reset_port(struct work_struct *work)
2716 {
2717 int ret;
2718 struct ehea_port *port =
2719 container_of(work, struct ehea_port, reset_task);
2720 struct net_device *dev = port->netdev;
2721
2722 mutex_lock(&dlpar_mem_lock);
2723 port->resets++;
2724 mutex_lock(&port->port_lock);
2725 netif_tx_disable(dev);
2726
2727 port_napi_disable(port);
2728
2729 ehea_down(dev);
2730
2731 ret = ehea_up(dev);
2732 if (ret)
2733 goto out;
2734
2735 ehea_set_multicast_list(dev);
2736
2737 netif_info(port, timer, dev, "reset successful\n");
2738
2739 port_napi_enable(port);
2740
2741 netif_tx_wake_all_queues(dev);
2742 out:
2743 mutex_unlock(&port->port_lock);
2744 mutex_unlock(&dlpar_mem_lock);
2745 }
2746
2747 static void ehea_rereg_mrs(void)
2748 {
2749 int ret, i;
2750 struct ehea_adapter *adapter;
2751
2752 pr_info("LPAR memory changed - re-initializing driver\n");
2753
2754 list_for_each_entry(adapter, &adapter_list, list)
2755 if (adapter->active_ports) {
2756 /* Shutdown all ports */
2757 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2758 struct ehea_port *port = adapter->port[i];
2759 struct net_device *dev;
2760
2761 if (!port)
2762 continue;
2763
2764 dev = port->netdev;
2765
2766 if (dev->flags & IFF_UP) {
2767 mutex_lock(&port->port_lock);
2768 netif_tx_disable(dev);
2769 ehea_flush_sq(port);
2770 ret = ehea_stop_qps(dev);
2771 if (ret) {
2772 mutex_unlock(&port->port_lock);
2773 goto out;
2774 }
2775 port_napi_disable(port);
2776 mutex_unlock(&port->port_lock);
2777 }
2778 reset_sq_restart_flag(port);
2779 }
2780
2781 /* Unregister old memory region */
2782 ret = ehea_rem_mr(&adapter->mr);
2783 if (ret) {
2784 pr_err("unregister MR failed - driver inoperable!\n");
2785 goto out;
2786 }
2787 }
2788
2789 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2790
2791 list_for_each_entry(adapter, &adapter_list, list)
2792 if (adapter->active_ports) {
2793 /* Register new memory region */
2794 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2795 if (ret) {
2796 pr_err("register MR failed - driver inoperable!\n");
2797 goto out;
2798 }
2799
2800 /* Restart all ports */
2801 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2802 struct ehea_port *port = adapter->port[i];
2803
2804 if (port) {
2805 struct net_device *dev = port->netdev;
2806
2807 if (dev->flags & IFF_UP) {
2808 mutex_lock(&port->port_lock);
2809 ret = ehea_restart_qps(dev);
2810 if (!ret) {
2811 check_sqs(port);
2812 port_napi_enable(port);
2813 netif_tx_wake_all_queues(dev);
2814 } else {
2815 netdev_err(dev, "Unable to restart QPS\n");
2816 }
2817 mutex_unlock(&port->port_lock);
2818 }
2819 }
2820 }
2821 }
2822 pr_info("re-initializing driver complete\n");
2823 out:
2824 return;
2825 }
2826
2827 static void ehea_tx_watchdog(struct net_device *dev)
2828 {
2829 struct ehea_port *port = netdev_priv(dev);
2830
2831 if (netif_carrier_ok(dev) &&
2832 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2833 ehea_schedule_port_reset(port);
2834 }
2835
2836 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2837 {
2838 struct hcp_query_ehea *cb;
2839 u64 hret;
2840 int ret;
2841
2842 cb = (void *)get_zeroed_page(GFP_KERNEL);
2843 if (!cb) {
2844 ret = -ENOMEM;
2845 goto out;
2846 }
2847
2848 hret = ehea_h_query_ehea(adapter->handle, cb);
2849
2850 if (hret != H_SUCCESS) {
2851 ret = -EIO;
2852 goto out_herr;
2853 }
2854
2855 adapter->max_mc_mac = cb->max_mc_mac - 1;
2856 ret = 0;
2857
2858 out_herr:
2859 free_page((unsigned long)cb);
2860 out:
2861 return ret;
2862 }
2863
2864 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2865 {
2866 struct hcp_ehea_port_cb4 *cb4;
2867 u64 hret;
2868 int ret = 0;
2869
2870 *jumbo = 0;
2871
2872 /* (Try to) enable *jumbo frames */
2873 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2874 if (!cb4) {
2875 pr_err("no mem for cb4\n");
2876 ret = -ENOMEM;
2877 goto out;
2878 } else {
2879 hret = ehea_h_query_ehea_port(port->adapter->handle,
2880 port->logical_port_id,
2881 H_PORT_CB4,
2882 H_PORT_CB4_JUMBO, cb4);
2883 if (hret == H_SUCCESS) {
2884 if (cb4->jumbo_frame)
2885 *jumbo = 1;
2886 else {
2887 cb4->jumbo_frame = 1;
2888 hret = ehea_h_modify_ehea_port(port->adapter->
2889 handle,
2890 port->
2891 logical_port_id,
2892 H_PORT_CB4,
2893 H_PORT_CB4_JUMBO,
2894 cb4);
2895 if (hret == H_SUCCESS)
2896 *jumbo = 1;
2897 }
2898 } else
2899 ret = -EINVAL;
2900
2901 free_page((unsigned long)cb4);
2902 }
2903 out:
2904 return ret;
2905 }
2906
2907 static ssize_t ehea_show_port_id(struct device *dev,
2908 struct device_attribute *attr, char *buf)
2909 {
2910 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2911 return sprintf(buf, "%d", port->logical_port_id);
2912 }
2913
2914 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2915 NULL);
2916
2917 static void logical_port_release(struct device *dev)
2918 {
2919 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2920 of_node_put(port->ofdev.dev.of_node);
2921 }
2922
2923 static struct device *ehea_register_port(struct ehea_port *port,
2924 struct device_node *dn)
2925 {
2926 int ret;
2927
2928 port->ofdev.dev.of_node = of_node_get(dn);
2929 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2930 port->ofdev.dev.bus = &ibmebus_bus_type;
2931
2932 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2933 port->ofdev.dev.release = logical_port_release;
2934
2935 ret = of_device_register(&port->ofdev);
2936 if (ret) {
2937 pr_err("failed to register device. ret=%d\n", ret);
2938 goto out;
2939 }
2940
2941 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2942 if (ret) {
2943 pr_err("failed to register attributes, ret=%d\n", ret);
2944 goto out_unreg_of_dev;
2945 }
2946
2947 return &port->ofdev.dev;
2948
2949 out_unreg_of_dev:
2950 of_device_unregister(&port->ofdev);
2951 out:
2952 return NULL;
2953 }
2954
2955 static void ehea_unregister_port(struct ehea_port *port)
2956 {
2957 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2958 of_device_unregister(&port->ofdev);
2959 }
2960
2961 static const struct net_device_ops ehea_netdev_ops = {
2962 .ndo_open = ehea_open,
2963 .ndo_stop = ehea_stop,
2964 .ndo_start_xmit = ehea_start_xmit,
2965 #ifdef CONFIG_NET_POLL_CONTROLLER
2966 .ndo_poll_controller = ehea_netpoll,
2967 #endif
2968 .ndo_get_stats64 = ehea_get_stats64,
2969 .ndo_set_mac_address = ehea_set_mac_addr,
2970 .ndo_validate_addr = eth_validate_addr,
2971 .ndo_set_rx_mode = ehea_set_multicast_list,
2972 .ndo_change_mtu = ehea_change_mtu,
2973 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
2974 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
2975 .ndo_tx_timeout = ehea_tx_watchdog,
2976 };
2977
2978 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2979 u32 logical_port_id,
2980 struct device_node *dn)
2981 {
2982 int ret;
2983 struct net_device *dev;
2984 struct ehea_port *port;
2985 struct device *port_dev;
2986 int jumbo;
2987
2988 /* allocate memory for the port structures */
2989 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2990
2991 if (!dev) {
2992 ret = -ENOMEM;
2993 goto out_err;
2994 }
2995
2996 port = netdev_priv(dev);
2997
2998 mutex_init(&port->port_lock);
2999 port->state = EHEA_PORT_DOWN;
3000 port->sig_comp_iv = sq_entries / 10;
3001
3002 port->adapter = adapter;
3003 port->netdev = dev;
3004 port->logical_port_id = logical_port_id;
3005
3006 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3007
3008 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3009 if (!port->mc_list) {
3010 ret = -ENOMEM;
3011 goto out_free_ethdev;
3012 }
3013
3014 INIT_LIST_HEAD(&port->mc_list->list);
3015
3016 ret = ehea_sense_port_attr(port);
3017 if (ret)
3018 goto out_free_mc_list;
3019
3020 netif_set_real_num_rx_queues(dev, port->num_def_qps);
3021 netif_set_real_num_tx_queues(dev, port->num_def_qps);
3022
3023 port_dev = ehea_register_port(port, dn);
3024 if (!port_dev)
3025 goto out_free_mc_list;
3026
3027 SET_NETDEV_DEV(dev, port_dev);
3028
3029 /* initialize net_device structure */
3030 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3031
3032 dev->netdev_ops = &ehea_netdev_ops;
3033 ehea_set_ethtool_ops(dev);
3034
3035 dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3036 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3037 dev->features = NETIF_F_SG | NETIF_F_TSO |
3038 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3039 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3040 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3041 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3042 NETIF_F_IP_CSUM;
3043 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3044
3045 INIT_WORK(&port->reset_task, ehea_reset_port);
3046 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3047
3048 init_waitqueue_head(&port->swqe_avail_wq);
3049 init_waitqueue_head(&port->restart_wq);
3050
3051 memset(&port->stats, 0, sizeof(struct net_device_stats));
3052 ret = register_netdev(dev);
3053 if (ret) {
3054 pr_err("register_netdev failed. ret=%d\n", ret);
3055 goto out_unreg_port;
3056 }
3057
3058 ret = ehea_get_jumboframe_status(port, &jumbo);
3059 if (ret)
3060 netdev_err(dev, "failed determining jumbo frame status\n");
3061
3062 netdev_info(dev, "Jumbo frames are %sabled\n",
3063 jumbo == 1 ? "en" : "dis");
3064
3065 adapter->active_ports++;
3066
3067 return port;
3068
3069 out_unreg_port:
3070 ehea_unregister_port(port);
3071
3072 out_free_mc_list:
3073 kfree(port->mc_list);
3074
3075 out_free_ethdev:
3076 free_netdev(dev);
3077
3078 out_err:
3079 pr_err("setting up logical port with id=%d failed, ret=%d\n",
3080 logical_port_id, ret);
3081 return NULL;
3082 }
3083
3084 static void ehea_shutdown_single_port(struct ehea_port *port)
3085 {
3086 struct ehea_adapter *adapter = port->adapter;
3087
3088 cancel_work_sync(&port->reset_task);
3089 cancel_delayed_work_sync(&port->stats_work);
3090 unregister_netdev(port->netdev);
3091 ehea_unregister_port(port);
3092 kfree(port->mc_list);
3093 free_netdev(port->netdev);
3094 adapter->active_ports--;
3095 }
3096
3097 static int ehea_setup_ports(struct ehea_adapter *adapter)
3098 {
3099 struct device_node *lhea_dn;
3100 struct device_node *eth_dn = NULL;
3101
3102 const u32 *dn_log_port_id;
3103 int i = 0;
3104
3105 lhea_dn = adapter->ofdev->dev.of_node;
3106 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3107
3108 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3109 NULL);
3110 if (!dn_log_port_id) {
3111 pr_err("bad device node: eth_dn name=%s\n",
3112 eth_dn->full_name);
3113 continue;
3114 }
3115
3116 if (ehea_add_adapter_mr(adapter)) {
3117 pr_err("creating MR failed\n");
3118 of_node_put(eth_dn);
3119 return -EIO;
3120 }
3121
3122 adapter->port[i] = ehea_setup_single_port(adapter,
3123 *dn_log_port_id,
3124 eth_dn);
3125 if (adapter->port[i])
3126 netdev_info(adapter->port[i]->netdev,
3127 "logical port id #%d\n", *dn_log_port_id);
3128 else
3129 ehea_remove_adapter_mr(adapter);
3130
3131 i++;
3132 }
3133 return 0;
3134 }
3135
3136 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3137 u32 logical_port_id)
3138 {
3139 struct device_node *lhea_dn;
3140 struct device_node *eth_dn = NULL;
3141 const u32 *dn_log_port_id;
3142
3143 lhea_dn = adapter->ofdev->dev.of_node;
3144 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3145
3146 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3147 NULL);
3148 if (dn_log_port_id)
3149 if (*dn_log_port_id == logical_port_id)
3150 return eth_dn;
3151 }
3152
3153 return NULL;
3154 }
3155
3156 static ssize_t ehea_probe_port(struct device *dev,
3157 struct device_attribute *attr,
3158 const char *buf, size_t count)
3159 {
3160 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3161 struct ehea_port *port;
3162 struct device_node *eth_dn = NULL;
3163 int i;
3164
3165 u32 logical_port_id;
3166
3167 sscanf(buf, "%d", &logical_port_id);
3168
3169 port = ehea_get_port(adapter, logical_port_id);
3170
3171 if (port) {
3172 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3173 logical_port_id);
3174 return -EINVAL;
3175 }
3176
3177 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3178
3179 if (!eth_dn) {
3180 pr_info("no logical port with id %d found\n", logical_port_id);
3181 return -EINVAL;
3182 }
3183
3184 if (ehea_add_adapter_mr(adapter)) {
3185 pr_err("creating MR failed\n");
3186 return -EIO;
3187 }
3188
3189 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3190
3191 of_node_put(eth_dn);
3192
3193 if (port) {
3194 for (i = 0; i < EHEA_MAX_PORTS; i++)
3195 if (!adapter->port[i]) {
3196 adapter->port[i] = port;
3197 break;
3198 }
3199
3200 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3201 logical_port_id);
3202 } else {
3203 ehea_remove_adapter_mr(adapter);
3204 return -EIO;
3205 }
3206
3207 return (ssize_t) count;
3208 }
3209
3210 static ssize_t ehea_remove_port(struct device *dev,
3211 struct device_attribute *attr,
3212 const char *buf, size_t count)
3213 {
3214 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3215 struct ehea_port *port;
3216 int i;
3217 u32 logical_port_id;
3218
3219 sscanf(buf, "%d", &logical_port_id);
3220
3221 port = ehea_get_port(adapter, logical_port_id);
3222
3223 if (port) {
3224 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3225 logical_port_id);
3226
3227 ehea_shutdown_single_port(port);
3228
3229 for (i = 0; i < EHEA_MAX_PORTS; i++)
3230 if (adapter->port[i] == port) {
3231 adapter->port[i] = NULL;
3232 break;
3233 }
3234 } else {
3235 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3236 logical_port_id);
3237 return -EINVAL;
3238 }
3239
3240 ehea_remove_adapter_mr(adapter);
3241
3242 return (ssize_t) count;
3243 }
3244
3245 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3246 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3247
3248 static int ehea_create_device_sysfs(struct platform_device *dev)
3249 {
3250 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3251 if (ret)
3252 goto out;
3253
3254 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3255 out:
3256 return ret;
3257 }
3258
3259 static void ehea_remove_device_sysfs(struct platform_device *dev)
3260 {
3261 device_remove_file(&dev->dev, &dev_attr_probe_port);
3262 device_remove_file(&dev->dev, &dev_attr_remove_port);
3263 }
3264
3265 static int ehea_reboot_notifier(struct notifier_block *nb,
3266 unsigned long action, void *unused)
3267 {
3268 if (action == SYS_RESTART) {
3269 pr_info("Reboot: freeing all eHEA resources\n");
3270 ibmebus_unregister_driver(&ehea_driver);
3271 }
3272 return NOTIFY_DONE;
3273 }
3274
3275 static struct notifier_block ehea_reboot_nb = {
3276 .notifier_call = ehea_reboot_notifier,
3277 };
3278
3279 static int ehea_mem_notifier(struct notifier_block *nb,
3280 unsigned long action, void *data)
3281 {
3282 int ret = NOTIFY_BAD;
3283 struct memory_notify *arg = data;
3284
3285 mutex_lock(&dlpar_mem_lock);
3286
3287 switch (action) {
3288 case MEM_CANCEL_OFFLINE:
3289 pr_info("memory offlining canceled");
3290 /* Fall through: re-add canceled memory block */
3291
3292 case MEM_ONLINE:
3293 pr_info("memory is going online");
3294 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3295 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3296 goto out_unlock;
3297 ehea_rereg_mrs();
3298 break;
3299
3300 case MEM_GOING_OFFLINE:
3301 pr_info("memory is going offline");
3302 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3303 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3304 goto out_unlock;
3305 ehea_rereg_mrs();
3306 break;
3307
3308 default:
3309 break;
3310 }
3311
3312 ehea_update_firmware_handles();
3313 ret = NOTIFY_OK;
3314
3315 out_unlock:
3316 mutex_unlock(&dlpar_mem_lock);
3317 return ret;
3318 }
3319
3320 static struct notifier_block ehea_mem_nb = {
3321 .notifier_call = ehea_mem_notifier,
3322 };
3323
3324 static void ehea_crash_handler(void)
3325 {
3326 int i;
3327
3328 if (ehea_fw_handles.arr)
3329 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3330 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3331 ehea_fw_handles.arr[i].fwh,
3332 FORCE_FREE);
3333
3334 if (ehea_bcmc_regs.arr)
3335 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3336 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3337 ehea_bcmc_regs.arr[i].port_id,
3338 ehea_bcmc_regs.arr[i].reg_type,
3339 ehea_bcmc_regs.arr[i].macaddr,
3340 0, H_DEREG_BCMC);
3341 }
3342
3343 static atomic_t ehea_memory_hooks_registered;
3344
3345 /* Register memory hooks on probe of first adapter */
3346 static int ehea_register_memory_hooks(void)
3347 {
3348 int ret = 0;
3349
3350 if (atomic_inc_and_test(&ehea_memory_hooks_registered))
3351 return 0;
3352
3353 ret = ehea_create_busmap();
3354 if (ret) {
3355 pr_info("ehea_create_busmap failed\n");
3356 goto out;
3357 }
3358
3359 ret = register_reboot_notifier(&ehea_reboot_nb);
3360 if (ret) {
3361 pr_info("register_reboot_notifier failed\n");
3362 goto out;
3363 }
3364
3365 ret = register_memory_notifier(&ehea_mem_nb);
3366 if (ret) {
3367 pr_info("register_memory_notifier failed\n");
3368 goto out2;
3369 }
3370
3371 ret = crash_shutdown_register(ehea_crash_handler);
3372 if (ret) {
3373 pr_info("crash_shutdown_register failed\n");
3374 goto out3;
3375 }
3376
3377 return 0;
3378
3379 out3:
3380 unregister_memory_notifier(&ehea_mem_nb);
3381 out2:
3382 unregister_reboot_notifier(&ehea_reboot_nb);
3383 out:
3384 return ret;
3385 }
3386
3387 static void ehea_unregister_memory_hooks(void)
3388 {
3389 if (atomic_read(&ehea_memory_hooks_registered))
3390 return;
3391
3392 unregister_reboot_notifier(&ehea_reboot_nb);
3393 if (crash_shutdown_unregister(ehea_crash_handler))
3394 pr_info("failed unregistering crash handler\n");
3395 unregister_memory_notifier(&ehea_mem_nb);
3396 }
3397
3398 static int ehea_probe_adapter(struct platform_device *dev)
3399 {
3400 struct ehea_adapter *adapter;
3401 const u64 *adapter_handle;
3402 int ret;
3403 int i;
3404
3405 ret = ehea_register_memory_hooks();
3406 if (ret)
3407 return ret;
3408
3409 if (!dev || !dev->dev.of_node) {
3410 pr_err("Invalid ibmebus device probed\n");
3411 return -EINVAL;
3412 }
3413
3414 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3415 if (!adapter) {
3416 ret = -ENOMEM;
3417 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3418 goto out;
3419 }
3420
3421 list_add(&adapter->list, &adapter_list);
3422
3423 adapter->ofdev = dev;
3424
3425 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3426 NULL);
3427 if (adapter_handle)
3428 adapter->handle = *adapter_handle;
3429
3430 if (!adapter->handle) {
3431 dev_err(&dev->dev, "failed getting handle for adapter"
3432 " '%s'\n", dev->dev.of_node->full_name);
3433 ret = -ENODEV;
3434 goto out_free_ad;
3435 }
3436
3437 adapter->pd = EHEA_PD_ID;
3438
3439 platform_set_drvdata(dev, adapter);
3440
3441
3442 /* initialize adapter and ports */
3443 /* get adapter properties */
3444 ret = ehea_sense_adapter_attr(adapter);
3445 if (ret) {
3446 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3447 goto out_free_ad;
3448 }
3449
3450 adapter->neq = ehea_create_eq(adapter,
3451 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3452 if (!adapter->neq) {
3453 ret = -EIO;
3454 dev_err(&dev->dev, "NEQ creation failed\n");
3455 goto out_free_ad;
3456 }
3457
3458 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3459 (unsigned long)adapter);
3460
3461 ret = ehea_create_device_sysfs(dev);
3462 if (ret)
3463 goto out_kill_eq;
3464
3465 ret = ehea_setup_ports(adapter);
3466 if (ret) {
3467 dev_err(&dev->dev, "setup_ports failed\n");
3468 goto out_rem_dev_sysfs;
3469 }
3470
3471 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3472 ehea_interrupt_neq, 0,
3473 "ehea_neq", adapter);
3474 if (ret) {
3475 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3476 goto out_shutdown_ports;
3477 }
3478
3479 /* Handle any events that might be pending. */
3480 tasklet_hi_schedule(&adapter->neq_tasklet);
3481
3482 ret = 0;
3483 goto out;
3484
3485 out_shutdown_ports:
3486 for (i = 0; i < EHEA_MAX_PORTS; i++)
3487 if (adapter->port[i]) {
3488 ehea_shutdown_single_port(adapter->port[i]);
3489 adapter->port[i] = NULL;
3490 }
3491
3492 out_rem_dev_sysfs:
3493 ehea_remove_device_sysfs(dev);
3494
3495 out_kill_eq:
3496 ehea_destroy_eq(adapter->neq);
3497
3498 out_free_ad:
3499 list_del(&adapter->list);
3500
3501 out:
3502 ehea_update_firmware_handles();
3503
3504 return ret;
3505 }
3506
3507 static int ehea_remove(struct platform_device *dev)
3508 {
3509 struct ehea_adapter *adapter = platform_get_drvdata(dev);
3510 int i;
3511
3512 for (i = 0; i < EHEA_MAX_PORTS; i++)
3513 if (adapter->port[i]) {
3514 ehea_shutdown_single_port(adapter->port[i]);
3515 adapter->port[i] = NULL;
3516 }
3517
3518 ehea_remove_device_sysfs(dev);
3519
3520 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3521 tasklet_kill(&adapter->neq_tasklet);
3522
3523 ehea_destroy_eq(adapter->neq);
3524 ehea_remove_adapter_mr(adapter);
3525 list_del(&adapter->list);
3526
3527 ehea_update_firmware_handles();
3528
3529 return 0;
3530 }
3531
3532 static int check_module_parm(void)
3533 {
3534 int ret = 0;
3535
3536 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3537 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3538 pr_info("Bad parameter: rq1_entries\n");
3539 ret = -EINVAL;
3540 }
3541 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3542 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3543 pr_info("Bad parameter: rq2_entries\n");
3544 ret = -EINVAL;
3545 }
3546 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3547 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3548 pr_info("Bad parameter: rq3_entries\n");
3549 ret = -EINVAL;
3550 }
3551 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3552 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3553 pr_info("Bad parameter: sq_entries\n");
3554 ret = -EINVAL;
3555 }
3556
3557 return ret;
3558 }
3559
3560 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3561 char *buf)
3562 {
3563 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3564 }
3565
3566 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3567 ehea_show_capabilities, NULL);
3568
3569 static int __init ehea_module_init(void)
3570 {
3571 int ret;
3572
3573 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3574
3575 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3576 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3577
3578 mutex_init(&ehea_fw_handles.lock);
3579 spin_lock_init(&ehea_bcmc_regs.lock);
3580
3581 ret = check_module_parm();
3582 if (ret)
3583 goto out;
3584
3585 ret = ibmebus_register_driver(&ehea_driver);
3586 if (ret) {
3587 pr_err("failed registering eHEA device driver on ebus\n");
3588 goto out;
3589 }
3590
3591 ret = driver_create_file(&ehea_driver.driver,
3592 &driver_attr_capabilities);
3593 if (ret) {
3594 pr_err("failed to register capabilities attribute, ret=%d\n",
3595 ret);
3596 goto out2;
3597 }
3598
3599 return ret;
3600
3601 out2:
3602 ibmebus_unregister_driver(&ehea_driver);
3603 out:
3604 return ret;
3605 }
3606
3607 static void __exit ehea_module_exit(void)
3608 {
3609 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3610 ibmebus_unregister_driver(&ehea_driver);
3611 ehea_unregister_memory_hooks();
3612 kfree(ehea_fw_handles.arr);
3613 kfree(ehea_bcmc_regs.arr);
3614 ehea_destroy_busmap();
3615 }
3616
3617 module_init(ehea_module_init);
3618 module_exit(ehea_module_exit);
Linux kernel - Deliverables
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