?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ehea: fix skb_frag_size typo
[linux-btrfs-devel.git] / drivers / net / ethernet / ibm / ehea / ehea_main.c
blob37b70f7052b68ad9a16593cb299cf6eb380a6491
1 /*
2 * linux/drivers/net/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/in.h>
32 #include <linux/ip.h>
33 #include <linux/tcp.h>
34 #include <linux/udp.h>
35 #include <linux/if.h>
36 #include <linux/list.h>
37 #include <linux/slab.h>
38 #include <linux/if_ether.h>
39 #include <linux/notifier.h>
40 #include <linux/reboot.h>
41 #include <linux/memory.h>
42 #include <asm/kexec.h>
43 #include <linux/mutex.h>
44 #include <linux/prefetch.h>
45
46 #include <net/ip.h>
47
48 #include "ehea.h"
49 #include "ehea_qmr.h"
50 #include "ehea_phyp.h"
51
52
53 MODULE_LICENSE("GPL");
54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
56 MODULE_VERSION(DRV_VERSION);
57
58
59 static int msg_level = -1;
60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
64 static int use_mcs = 1;
65 static int prop_carrier_state;
66
67 module_param(msg_level, int, 0);
68 module_param(rq1_entries, int, 0);
69 module_param(rq2_entries, int, 0);
70 module_param(rq3_entries, int, 0);
71 module_param(sq_entries, int, 0);
72 module_param(prop_carrier_state, int, 0);
73 module_param(use_mcs, int, 0);
74
75 MODULE_PARM_DESC(msg_level, "msg_level");
76 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
77 "port to stack. 1:yes, 0:no. Default = 0 ");
78 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
79 "[2^x - 1], x = [6..14]. Default = "
80 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
81 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
82 "[2^x - 1], x = [6..14]. Default = "
83 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
84 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
85 "[2^x - 1], x = [6..14]. Default = "
86 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
87 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
88 "[2^x - 1], x = [6..14]. Default = "
89 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
90 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
91 "Default = 1");
92
93 static int port_name_cnt;
94 static LIST_HEAD(adapter_list);
95 static unsigned long ehea_driver_flags;
96 static DEFINE_MUTEX(dlpar_mem_lock);
97 struct ehea_fw_handle_array ehea_fw_handles;
98 struct ehea_bcmc_reg_array ehea_bcmc_regs;
99
100
101 static int __devinit ehea_probe_adapter(struct platform_device *dev,
102 const struct of_device_id *id);
103
104 static int __devexit ehea_remove(struct platform_device *dev);
105
106 static struct of_device_id ehea_device_table[] = {
107 {
108 .name = "lhea",
109 .compatible = "IBM,lhea",
110 },
111 {},
112 };
113 MODULE_DEVICE_TABLE(of, ehea_device_table);
114
115 static struct of_platform_driver ehea_driver = {
116 .driver = {
117 .name = "ehea",
118 .owner = THIS_MODULE,
119 .of_match_table = ehea_device_table,
120 },
121 .probe = ehea_probe_adapter,
122 .remove = ehea_remove,
123 };
124
125 void ehea_dump(void *adr, int len, char *msg)
126 {
127 int x;
128 unsigned char *deb = adr;
129 for (x = 0; x < len; x += 16) {
130 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
131 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
132 deb += 16;
133 }
134 }
135
136 void ehea_schedule_port_reset(struct ehea_port *port)
137 {
138 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
139 schedule_work(&port->reset_task);
140 }
141
142 static void ehea_update_firmware_handles(void)
143 {
144 struct ehea_fw_handle_entry *arr = NULL;
145 struct ehea_adapter *adapter;
146 int num_adapters = 0;
147 int num_ports = 0;
148 int num_portres = 0;
149 int i = 0;
150 int num_fw_handles, k, l;
151
152 /* Determine number of handles */
153 mutex_lock(&ehea_fw_handles.lock);
154
155 list_for_each_entry(adapter, &adapter_list, list) {
156 num_adapters++;
157
158 for (k = 0; k < EHEA_MAX_PORTS; k++) {
159 struct ehea_port *port = adapter->port[k];
160
161 if (!port || (port->state != EHEA_PORT_UP))
162 continue;
163
164 num_ports++;
165 num_portres += port->num_def_qps;
166 }
167 }
168
169 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
170 num_ports * EHEA_NUM_PORT_FW_HANDLES +
171 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
172
173 if (num_fw_handles) {
174 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
175 if (!arr)
176 goto out; /* Keep the existing array */
177 } else
178 goto out_update;
179
180 list_for_each_entry(adapter, &adapter_list, list) {
181 if (num_adapters == 0)
182 break;
183
184 for (k = 0; k < EHEA_MAX_PORTS; k++) {
185 struct ehea_port *port = adapter->port[k];
186
187 if (!port || (port->state != EHEA_PORT_UP) ||
188 (num_ports == 0))
189 continue;
190
191 for (l = 0; l < port->num_def_qps; l++) {
192 struct ehea_port_res *pr = &port->port_res[l];
193
194 arr[i].adh = adapter->handle;
195 arr[i++].fwh = pr->qp->fw_handle;
196 arr[i].adh = adapter->handle;
197 arr[i++].fwh = pr->send_cq->fw_handle;
198 arr[i].adh = adapter->handle;
199 arr[i++].fwh = pr->recv_cq->fw_handle;
200 arr[i].adh = adapter->handle;
201 arr[i++].fwh = pr->eq->fw_handle;
202 arr[i].adh = adapter->handle;
203 arr[i++].fwh = pr->send_mr.handle;
204 arr[i].adh = adapter->handle;
205 arr[i++].fwh = pr->recv_mr.handle;
206 }
207 arr[i].adh = adapter->handle;
208 arr[i++].fwh = port->qp_eq->fw_handle;
209 num_ports--;
210 }
211
212 arr[i].adh = adapter->handle;
213 arr[i++].fwh = adapter->neq->fw_handle;
214
215 if (adapter->mr.handle) {
216 arr[i].adh = adapter->handle;
217 arr[i++].fwh = adapter->mr.handle;
218 }
219 num_adapters--;
220 }
221
222 out_update:
223 kfree(ehea_fw_handles.arr);
224 ehea_fw_handles.arr = arr;
225 ehea_fw_handles.num_entries = i;
226 out:
227 mutex_unlock(&ehea_fw_handles.lock);
228 }
229
230 static void ehea_update_bcmc_registrations(void)
231 {
232 unsigned long flags;
233 struct ehea_bcmc_reg_entry *arr = NULL;
234 struct ehea_adapter *adapter;
235 struct ehea_mc_list *mc_entry;
236 int num_registrations = 0;
237 int i = 0;
238 int k;
239
240 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
241
242 /* Determine number of registrations */
243 list_for_each_entry(adapter, &adapter_list, list)
244 for (k = 0; k < EHEA_MAX_PORTS; k++) {
245 struct ehea_port *port = adapter->port[k];
246
247 if (!port || (port->state != EHEA_PORT_UP))
248 continue;
249
250 num_registrations += 2; /* Broadcast registrations */
251
252 list_for_each_entry(mc_entry, &port->mc_list->list,list)
253 num_registrations += 2;
254 }
255
256 if (num_registrations) {
257 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
258 if (!arr)
259 goto out; /* Keep the existing array */
260 } else
261 goto out_update;
262
263 list_for_each_entry(adapter, &adapter_list, list) {
264 for (k = 0; k < EHEA_MAX_PORTS; k++) {
265 struct ehea_port *port = adapter->port[k];
266
267 if (!port || (port->state != EHEA_PORT_UP))
268 continue;
269
270 if (num_registrations == 0)
271 goto out_update;
272
273 arr[i].adh = adapter->handle;
274 arr[i].port_id = port->logical_port_id;
275 arr[i].reg_type = EHEA_BCMC_BROADCAST |
276 EHEA_BCMC_UNTAGGED;
277 arr[i++].macaddr = port->mac_addr;
278
279 arr[i].adh = adapter->handle;
280 arr[i].port_id = port->logical_port_id;
281 arr[i].reg_type = EHEA_BCMC_BROADCAST |
282 EHEA_BCMC_VLANID_ALL;
283 arr[i++].macaddr = port->mac_addr;
284 num_registrations -= 2;
285
286 list_for_each_entry(mc_entry,
287 &port->mc_list->list, list) {
288 if (num_registrations == 0)
289 goto out_update;
290
291 arr[i].adh = adapter->handle;
292 arr[i].port_id = port->logical_port_id;
293 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
294 EHEA_BCMC_MULTICAST |
295 EHEA_BCMC_UNTAGGED;
296 arr[i++].macaddr = mc_entry->macaddr;
297
298 arr[i].adh = adapter->handle;
299 arr[i].port_id = port->logical_port_id;
300 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
301 EHEA_BCMC_MULTICAST |
302 EHEA_BCMC_VLANID_ALL;
303 arr[i++].macaddr = mc_entry->macaddr;
304 num_registrations -= 2;
305 }
306 }
307 }
308
309 out_update:
310 kfree(ehea_bcmc_regs.arr);
311 ehea_bcmc_regs.arr = arr;
312 ehea_bcmc_regs.num_entries = i;
313 out:
314 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
315 }
316
317 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
318 struct rtnl_link_stats64 *stats)
319 {
320 struct ehea_port *port = netdev_priv(dev);
321 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
322 int i;
323
324 for (i = 0; i < port->num_def_qps; i++) {
325 rx_packets += port->port_res[i].rx_packets;
326 rx_bytes += port->port_res[i].rx_bytes;
327 }
328
329 for (i = 0; i < port->num_def_qps; i++) {
330 tx_packets += port->port_res[i].tx_packets;
331 tx_bytes += port->port_res[i].tx_bytes;
332 }
333
334 stats->tx_packets = tx_packets;
335 stats->rx_bytes = rx_bytes;
336 stats->tx_bytes = tx_bytes;
337 stats->rx_packets = rx_packets;
338
339 return &port->stats;
340 }
341
342 static void ehea_update_stats(struct work_struct *work)
343 {
344 struct ehea_port *port =
345 container_of(work, struct ehea_port, stats_work.work);
346 struct net_device *dev = port->netdev;
347 struct rtnl_link_stats64 *stats = &port->stats;
348 struct hcp_ehea_port_cb2 *cb2;
349 u64 hret;
350
351 cb2 = (void *)get_zeroed_page(GFP_KERNEL);
352 if (!cb2) {
353 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
354 goto resched;
355 }
356
357 hret = ehea_h_query_ehea_port(port->adapter->handle,
358 port->logical_port_id,
359 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
360 if (hret != H_SUCCESS) {
361 netdev_err(dev, "query_ehea_port failed\n");
362 goto out_herr;
363 }
364
365 if (netif_msg_hw(port))
366 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
367
368 stats->multicast = cb2->rxmcp;
369 stats->rx_errors = cb2->rxuerr;
370
371 out_herr:
372 free_page((unsigned long)cb2);
373 resched:
374 schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
375 }
376
377 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
378 {
379 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
380 struct net_device *dev = pr->port->netdev;
381 int max_index_mask = pr->rq1_skba.len - 1;
382 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
383 int adder = 0;
384 int i;
385
386 pr->rq1_skba.os_skbs = 0;
387
388 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
389 if (nr_of_wqes > 0)
390 pr->rq1_skba.index = index;
391 pr->rq1_skba.os_skbs = fill_wqes;
392 return;
393 }
394
395 for (i = 0; i < fill_wqes; i++) {
396 if (!skb_arr_rq1[index]) {
397 skb_arr_rq1[index] = netdev_alloc_skb(dev,
398 EHEA_L_PKT_SIZE);
399 if (!skb_arr_rq1[index]) {
400 netdev_info(dev, "Unable to allocate enough skb in the array\n");
401 pr->rq1_skba.os_skbs = fill_wqes - i;
402 break;
403 }
404 }
405 index--;
406 index &= max_index_mask;
407 adder++;
408 }
409
410 if (adder == 0)
411 return;
412
413 /* Ring doorbell */
414 ehea_update_rq1a(pr->qp, adder);
415 }
416
417 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
418 {
419 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
420 struct net_device *dev = pr->port->netdev;
421 int i;
422
423 if (nr_rq1a > pr->rq1_skba.len) {
424 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
425 return;
426 }
427
428 for (i = 0; i < nr_rq1a; i++) {
429 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
430 if (!skb_arr_rq1[i]) {
431 netdev_info(dev, "Not enough memory to allocate skb array\n");
432 break;
433 }
434 }
435 /* Ring doorbell */
436 ehea_update_rq1a(pr->qp, i - 1);
437 }
438
439 static int ehea_refill_rq_def(struct ehea_port_res *pr,
440 struct ehea_q_skb_arr *q_skba, int rq_nr,
441 int num_wqes, int wqe_type, int packet_size)
442 {
443 struct net_device *dev = pr->port->netdev;
444 struct ehea_qp *qp = pr->qp;
445 struct sk_buff **skb_arr = q_skba->arr;
446 struct ehea_rwqe *rwqe;
447 int i, index, max_index_mask, fill_wqes;
448 int adder = 0;
449 int ret = 0;
450
451 fill_wqes = q_skba->os_skbs + num_wqes;
452 q_skba->os_skbs = 0;
453
454 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
455 q_skba->os_skbs = fill_wqes;
456 return ret;
457 }
458
459 index = q_skba->index;
460 max_index_mask = q_skba->len - 1;
461 for (i = 0; i < fill_wqes; i++) {
462 u64 tmp_addr;
463 struct sk_buff *skb;
464
465 skb = netdev_alloc_skb_ip_align(dev, packet_size);
466 if (!skb) {
467 q_skba->os_skbs = fill_wqes - i;
468 if (q_skba->os_skbs == q_skba->len - 2) {
469 netdev_info(pr->port->netdev,
470 "rq%i ran dry - no mem for skb\n",
471 rq_nr);
472 ret = -ENOMEM;
473 }
474 break;
475 }
476
477 skb_arr[index] = skb;
478 tmp_addr = ehea_map_vaddr(skb->data);
479 if (tmp_addr == -1) {
480 dev_kfree_skb(skb);
481 q_skba->os_skbs = fill_wqes - i;
482 ret = 0;
483 break;
484 }
485
486 rwqe = ehea_get_next_rwqe(qp, rq_nr);
487 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
488 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
489 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
490 rwqe->sg_list[0].vaddr = tmp_addr;
491 rwqe->sg_list[0].len = packet_size;
492 rwqe->data_segments = 1;
493
494 index++;
495 index &= max_index_mask;
496 adder++;
497 }
498
499 q_skba->index = index;
500 if (adder == 0)
501 goto out;
502
503 /* Ring doorbell */
504 iosync();
505 if (rq_nr == 2)
506 ehea_update_rq2a(pr->qp, adder);
507 else
508 ehea_update_rq3a(pr->qp, adder);
509 out:
510 return ret;
511 }
512
513
514 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
515 {
516 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
517 nr_of_wqes, EHEA_RWQE2_TYPE,
518 EHEA_RQ2_PKT_SIZE);
519 }
520
521
522 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
523 {
524 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
525 nr_of_wqes, EHEA_RWQE3_TYPE,
526 EHEA_MAX_PACKET_SIZE);
527 }
528
529 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
530 {
531 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
532 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
533 return 0;
534 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
535 (cqe->header_length == 0))
536 return 0;
537 return -EINVAL;
538 }
539
540 static inline void ehea_fill_skb(struct net_device *dev,
541 struct sk_buff *skb, struct ehea_cqe *cqe,
542 struct ehea_port_res *pr)
543 {
544 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
545
546 skb_put(skb, length);
547 skb->protocol = eth_type_trans(skb, dev);
548
549 /* The packet was not an IPV4 packet so a complemented checksum was
550 calculated. The value is found in the Internet Checksum field. */
551 if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
552 skb->ip_summed = CHECKSUM_COMPLETE;
553 skb->csum = csum_unfold(~cqe->inet_checksum_value);
554 } else
555 skb->ip_summed = CHECKSUM_UNNECESSARY;
556
557 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
558 }
559
560 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
561 int arr_len,
562 struct ehea_cqe *cqe)
563 {
564 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
565 struct sk_buff *skb;
566 void *pref;
567 int x;
568
569 x = skb_index + 1;
570 x &= (arr_len - 1);
571
572 pref = skb_array[x];
573 if (pref) {
574 prefetchw(pref);
575 prefetchw(pref + EHEA_CACHE_LINE);
576
577 pref = (skb_array[x]->data);
578 prefetch(pref);
579 prefetch(pref + EHEA_CACHE_LINE);
580 prefetch(pref + EHEA_CACHE_LINE * 2);
581 prefetch(pref + EHEA_CACHE_LINE * 3);
582 }
583
584 skb = skb_array[skb_index];
585 skb_array[skb_index] = NULL;
586 return skb;
587 }
588
589 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
590 int arr_len, int wqe_index)
591 {
592 struct sk_buff *skb;
593 void *pref;
594 int x;
595
596 x = wqe_index + 1;
597 x &= (arr_len - 1);
598
599 pref = skb_array[x];
600 if (pref) {
601 prefetchw(pref);
602 prefetchw(pref + EHEA_CACHE_LINE);
603
604 pref = (skb_array[x]->data);
605 prefetchw(pref);
606 prefetchw(pref + EHEA_CACHE_LINE);
607 }
608
609 skb = skb_array[wqe_index];
610 skb_array[wqe_index] = NULL;
611 return skb;
612 }
613
614 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
615 struct ehea_cqe *cqe, int *processed_rq2,
616 int *processed_rq3)
617 {
618 struct sk_buff *skb;
619
620 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
621 pr->p_stats.err_tcp_cksum++;
622 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
623 pr->p_stats.err_ip_cksum++;
624 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
625 pr->p_stats.err_frame_crc++;
626
627 if (rq == 2) {
628 *processed_rq2 += 1;
629 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
630 dev_kfree_skb(skb);
631 } else if (rq == 3) {
632 *processed_rq3 += 1;
633 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
634 dev_kfree_skb(skb);
635 }
636
637 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
638 if (netif_msg_rx_err(pr->port)) {
639 pr_err("Critical receive error for QP %d. Resetting port.\n",
640 pr->qp->init_attr.qp_nr);
641 ehea_dump(cqe, sizeof(*cqe), "CQE");
642 }
643 ehea_schedule_port_reset(pr->port);
644 return 1;
645 }
646
647 return 0;
648 }
649
650 static int ehea_proc_rwqes(struct net_device *dev,
651 struct ehea_port_res *pr,
652 int budget)
653 {
654 struct ehea_port *port = pr->port;
655 struct ehea_qp *qp = pr->qp;
656 struct ehea_cqe *cqe;
657 struct sk_buff *skb;
658 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
659 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
660 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
661 int skb_arr_rq1_len = pr->rq1_skba.len;
662 int skb_arr_rq2_len = pr->rq2_skba.len;
663 int skb_arr_rq3_len = pr->rq3_skba.len;
664 int processed, processed_rq1, processed_rq2, processed_rq3;
665 u64 processed_bytes = 0;
666 int wqe_index, last_wqe_index, rq, port_reset;
667
668 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
669 last_wqe_index = 0;
670
671 cqe = ehea_poll_rq1(qp, &wqe_index);
672 while ((processed < budget) && cqe) {
673 ehea_inc_rq1(qp);
674 processed_rq1++;
675 processed++;
676 if (netif_msg_rx_status(port))
677 ehea_dump(cqe, sizeof(*cqe), "CQE");
678
679 last_wqe_index = wqe_index;
680 rmb();
681 if (!ehea_check_cqe(cqe, &rq)) {
682 if (rq == 1) {
683 /* LL RQ1 */
684 skb = get_skb_by_index_ll(skb_arr_rq1,
685 skb_arr_rq1_len,
686 wqe_index);
687 if (unlikely(!skb)) {
688 netif_info(port, rx_err, dev,
689 "LL rq1: skb=NULL\n");
690
691 skb = netdev_alloc_skb(dev,
692 EHEA_L_PKT_SIZE);
693 if (!skb) {
694 netdev_err(dev, "Not enough memory to allocate skb\n");
695 break;
696 }
697 }
698 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
699 cqe->num_bytes_transfered - 4);
700 ehea_fill_skb(dev, skb, cqe, pr);
701 } else if (rq == 2) {
702 /* RQ2 */
703 skb = get_skb_by_index(skb_arr_rq2,
704 skb_arr_rq2_len, cqe);
705 if (unlikely(!skb)) {
706 netif_err(port, rx_err, dev,
707 "rq2: skb=NULL\n");
708 break;
709 }
710 ehea_fill_skb(dev, skb, cqe, pr);
711 processed_rq2++;
712 } else {
713 /* RQ3 */
714 skb = get_skb_by_index(skb_arr_rq3,
715 skb_arr_rq3_len, cqe);
716 if (unlikely(!skb)) {
717 netif_err(port, rx_err, dev,
718 "rq3: skb=NULL\n");
719 break;
720 }
721 ehea_fill_skb(dev, skb, cqe, pr);
722 processed_rq3++;
723 }
724
725 processed_bytes += skb->len;
726
727 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
728 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
729
730 napi_gro_receive(&pr->napi, skb);
731 } else {
732 pr->p_stats.poll_receive_errors++;
733 port_reset = ehea_treat_poll_error(pr, rq, cqe,
734 &processed_rq2,
735 &processed_rq3);
736 if (port_reset)
737 break;
738 }
739 cqe = ehea_poll_rq1(qp, &wqe_index);
740 }
741
742 pr->rx_packets += processed;
743 pr->rx_bytes += processed_bytes;
744
745 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
746 ehea_refill_rq2(pr, processed_rq2);
747 ehea_refill_rq3(pr, processed_rq3);
748
749 return processed;
750 }
751
752 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
753
754 static void reset_sq_restart_flag(struct ehea_port *port)
755 {
756 int i;
757
758 for (i = 0; i < port->num_def_qps; i++) {
759 struct ehea_port_res *pr = &port->port_res[i];
760 pr->sq_restart_flag = 0;
761 }
762 wake_up(&port->restart_wq);
763 }
764
765 static void check_sqs(struct ehea_port *port)
766 {
767 struct ehea_swqe *swqe;
768 int swqe_index;
769 int i, k;
770
771 for (i = 0; i < port->num_def_qps; i++) {
772 struct ehea_port_res *pr = &port->port_res[i];
773 int ret;
774 k = 0;
775 swqe = ehea_get_swqe(pr->qp, &swqe_index);
776 memset(swqe, 0, SWQE_HEADER_SIZE);
777 atomic_dec(&pr->swqe_avail);
778
779 swqe->tx_control |= EHEA_SWQE_PURGE;
780 swqe->wr_id = SWQE_RESTART_CHECK;
781 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
782 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
783 swqe->immediate_data_length = 80;
784
785 ehea_post_swqe(pr->qp, swqe);
786
787 ret = wait_event_timeout(port->restart_wq,
788 pr->sq_restart_flag == 0,
789 msecs_to_jiffies(100));
790
791 if (!ret) {
792 pr_err("HW/SW queues out of sync\n");
793 ehea_schedule_port_reset(pr->port);
794 return;
795 }
796 }
797 }
798
799
800 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
801 {
802 struct sk_buff *skb;
803 struct ehea_cq *send_cq = pr->send_cq;
804 struct ehea_cqe *cqe;
805 int quota = my_quota;
806 int cqe_counter = 0;
807 int swqe_av = 0;
808 int index;
809 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
810 pr - &pr->port->port_res[0]);
811
812 cqe = ehea_poll_cq(send_cq);
813 while (cqe && (quota > 0)) {
814 ehea_inc_cq(send_cq);
815
816 cqe_counter++;
817 rmb();
818
819 if (cqe->wr_id == SWQE_RESTART_CHECK) {
820 pr->sq_restart_flag = 1;
821 swqe_av++;
822 break;
823 }
824
825 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
826 pr_err("Bad send completion status=0x%04X\n",
827 cqe->status);
828
829 if (netif_msg_tx_err(pr->port))
830 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
831
832 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
833 pr_err("Resetting port\n");
834 ehea_schedule_port_reset(pr->port);
835 break;
836 }
837 }
838
839 if (netif_msg_tx_done(pr->port))
840 ehea_dump(cqe, sizeof(*cqe), "CQE");
841
842 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
843 == EHEA_SWQE2_TYPE)) {
844
845 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
846 skb = pr->sq_skba.arr[index];
847 dev_kfree_skb(skb);
848 pr->sq_skba.arr[index] = NULL;
849 }
850
851 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
852 quota--;
853
854 cqe = ehea_poll_cq(send_cq);
855 }
856
857 ehea_update_feca(send_cq, cqe_counter);
858 atomic_add(swqe_av, &pr->swqe_avail);
859
860 if (unlikely(netif_tx_queue_stopped(txq) &&
861 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
862 __netif_tx_lock(txq, smp_processor_id());
863 if (netif_tx_queue_stopped(txq) &&
864 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
865 netif_tx_wake_queue(txq);
866 __netif_tx_unlock(txq);
867 }
868
869 wake_up(&pr->port->swqe_avail_wq);
870
871 return cqe;
872 }
873
874 #define EHEA_POLL_MAX_CQES 65535
875
876 static int ehea_poll(struct napi_struct *napi, int budget)
877 {
878 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
879 napi);
880 struct net_device *dev = pr->port->netdev;
881 struct ehea_cqe *cqe;
882 struct ehea_cqe *cqe_skb = NULL;
883 int wqe_index;
884 int rx = 0;
885
886 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
887 rx += ehea_proc_rwqes(dev, pr, budget - rx);
888
889 while (rx != budget) {
890 napi_complete(napi);
891 ehea_reset_cq_ep(pr->recv_cq);
892 ehea_reset_cq_ep(pr->send_cq);
893 ehea_reset_cq_n1(pr->recv_cq);
894 ehea_reset_cq_n1(pr->send_cq);
895 rmb();
896 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
897 cqe_skb = ehea_poll_cq(pr->send_cq);
898
899 if (!cqe && !cqe_skb)
900 return rx;
901
902 if (!napi_reschedule(napi))
903 return rx;
904
905 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
906 rx += ehea_proc_rwqes(dev, pr, budget - rx);
907 }
908
909 return rx;
910 }
911
912 #ifdef CONFIG_NET_POLL_CONTROLLER
913 static void ehea_netpoll(struct net_device *dev)
914 {
915 struct ehea_port *port = netdev_priv(dev);
916 int i;
917
918 for (i = 0; i < port->num_def_qps; i++)
919 napi_schedule(&port->port_res[i].napi);
920 }
921 #endif
922
923 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
924 {
925 struct ehea_port_res *pr = param;
926
927 napi_schedule(&pr->napi);
928
929 return IRQ_HANDLED;
930 }
931
932 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
933 {
934 struct ehea_port *port = param;
935 struct ehea_eqe *eqe;
936 struct ehea_qp *qp;
937 u32 qp_token;
938 u64 resource_type, aer, aerr;
939 int reset_port = 0;
940
941 eqe = ehea_poll_eq(port->qp_eq);
942
943 while (eqe) {
944 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
945 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
946 eqe->entry, qp_token);
947
948 qp = port->port_res[qp_token].qp;
949
950 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
951 &aer, &aerr);
952
953 if (resource_type == EHEA_AER_RESTYPE_QP) {
954 if ((aer & EHEA_AER_RESET_MASK) ||
955 (aerr & EHEA_AERR_RESET_MASK))
956 reset_port = 1;
957 } else
958 reset_port = 1; /* Reset in case of CQ or EQ error */
959
960 eqe = ehea_poll_eq(port->qp_eq);
961 }
962
963 if (reset_port) {
964 pr_err("Resetting port\n");
965 ehea_schedule_port_reset(port);
966 }
967
968 return IRQ_HANDLED;
969 }
970
971 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
972 int logical_port)
973 {
974 int i;
975
976 for (i = 0; i < EHEA_MAX_PORTS; i++)
977 if (adapter->port[i])
978 if (adapter->port[i]->logical_port_id == logical_port)
979 return adapter->port[i];
980 return NULL;
981 }
982
983 int ehea_sense_port_attr(struct ehea_port *port)
984 {
985 int ret;
986 u64 hret;
987 struct hcp_ehea_port_cb0 *cb0;
988
989 /* may be called via ehea_neq_tasklet() */
990 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
991 if (!cb0) {
992 pr_err("no mem for cb0\n");
993 ret = -ENOMEM;
994 goto out;
995 }
996
997 hret = ehea_h_query_ehea_port(port->adapter->handle,
998 port->logical_port_id, H_PORT_CB0,
999 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1000 cb0);
1001 if (hret != H_SUCCESS) {
1002 ret = -EIO;
1003 goto out_free;
1004 }
1005
1006 /* MAC address */
1007 port->mac_addr = cb0->port_mac_addr << 16;
1008
1009 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1010 ret = -EADDRNOTAVAIL;
1011 goto out_free;
1012 }
1013
1014 /* Port speed */
1015 switch (cb0->port_speed) {
1016 case H_SPEED_10M_H:
1017 port->port_speed = EHEA_SPEED_10M;
1018 port->full_duplex = 0;
1019 break;
1020 case H_SPEED_10M_F:
1021 port->port_speed = EHEA_SPEED_10M;
1022 port->full_duplex = 1;
1023 break;
1024 case H_SPEED_100M_H:
1025 port->port_speed = EHEA_SPEED_100M;
1026 port->full_duplex = 0;
1027 break;
1028 case H_SPEED_100M_F:
1029 port->port_speed = EHEA_SPEED_100M;
1030 port->full_duplex = 1;
1031 break;
1032 case H_SPEED_1G_F:
1033 port->port_speed = EHEA_SPEED_1G;
1034 port->full_duplex = 1;
1035 break;
1036 case H_SPEED_10G_F:
1037 port->port_speed = EHEA_SPEED_10G;
1038 port->full_duplex = 1;
1039 break;
1040 default:
1041 port->port_speed = 0;
1042 port->full_duplex = 0;
1043 break;
1044 }
1045
1046 port->autoneg = 1;
1047 port->num_mcs = cb0->num_default_qps;
1048
1049 /* Number of default QPs */
1050 if (use_mcs)
1051 port->num_def_qps = cb0->num_default_qps;
1052 else
1053 port->num_def_qps = 1;
1054
1055 if (!port->num_def_qps) {
1056 ret = -EINVAL;
1057 goto out_free;
1058 }
1059
1060 ret = 0;
1061 out_free:
1062 if (ret || netif_msg_probe(port))
1063 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1064 free_page((unsigned long)cb0);
1065 out:
1066 return ret;
1067 }
1068
1069 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1070 {
1071 struct hcp_ehea_port_cb4 *cb4;
1072 u64 hret;
1073 int ret = 0;
1074
1075 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1076 if (!cb4) {
1077 pr_err("no mem for cb4\n");
1078 ret = -ENOMEM;
1079 goto out;
1080 }
1081
1082 cb4->port_speed = port_speed;
1083
1084 netif_carrier_off(port->netdev);
1085
1086 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1087 port->logical_port_id,
1088 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1089 if (hret == H_SUCCESS) {
1090 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1091
1092 hret = ehea_h_query_ehea_port(port->adapter->handle,
1093 port->logical_port_id,
1094 H_PORT_CB4, H_PORT_CB4_SPEED,
1095 cb4);
1096 if (hret == H_SUCCESS) {
1097 switch (cb4->port_speed) {
1098 case H_SPEED_10M_H:
1099 port->port_speed = EHEA_SPEED_10M;
1100 port->full_duplex = 0;
1101 break;
1102 case H_SPEED_10M_F:
1103 port->port_speed = EHEA_SPEED_10M;
1104 port->full_duplex = 1;
1105 break;
1106 case H_SPEED_100M_H:
1107 port->port_speed = EHEA_SPEED_100M;
1108 port->full_duplex = 0;
1109 break;
1110 case H_SPEED_100M_F:
1111 port->port_speed = EHEA_SPEED_100M;
1112 port->full_duplex = 1;
1113 break;
1114 case H_SPEED_1G_F:
1115 port->port_speed = EHEA_SPEED_1G;
1116 port->full_duplex = 1;
1117 break;
1118 case H_SPEED_10G_F:
1119 port->port_speed = EHEA_SPEED_10G;
1120 port->full_duplex = 1;
1121 break;
1122 default:
1123 port->port_speed = 0;
1124 port->full_duplex = 0;
1125 break;
1126 }
1127 } else {
1128 pr_err("Failed sensing port speed\n");
1129 ret = -EIO;
1130 }
1131 } else {
1132 if (hret == H_AUTHORITY) {
1133 pr_info("Hypervisor denied setting port speed\n");
1134 ret = -EPERM;
1135 } else {
1136 ret = -EIO;
1137 pr_err("Failed setting port speed\n");
1138 }
1139 }
1140 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1141 netif_carrier_on(port->netdev);
1142
1143 free_page((unsigned long)cb4);
1144 out:
1145 return ret;
1146 }
1147
1148 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1149 {
1150 int ret;
1151 u8 ec;
1152 u8 portnum;
1153 struct ehea_port *port;
1154 struct net_device *dev;
1155
1156 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1157 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1158 port = ehea_get_port(adapter, portnum);
1159 dev = port->netdev;
1160
1161 switch (ec) {
1162 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1163
1164 if (!port) {
1165 netdev_err(dev, "unknown portnum %x\n", portnum);
1166 break;
1167 }
1168
1169 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1170 if (!netif_carrier_ok(dev)) {
1171 ret = ehea_sense_port_attr(port);
1172 if (ret) {
1173 netdev_err(dev, "failed resensing port attributes\n");
1174 break;
1175 }
1176
1177 netif_info(port, link, dev,
1178 "Logical port up: %dMbps %s Duplex\n",
1179 port->port_speed,
1180 port->full_duplex == 1 ?
1181 "Full" : "Half");
1182
1183 netif_carrier_on(dev);
1184 netif_wake_queue(dev);
1185 }
1186 } else
1187 if (netif_carrier_ok(dev)) {
1188 netif_info(port, link, dev,
1189 "Logical port down\n");
1190 netif_carrier_off(dev);
1191 netif_tx_disable(dev);
1192 }
1193
1194 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1195 port->phy_link = EHEA_PHY_LINK_UP;
1196 netif_info(port, link, dev,
1197 "Physical port up\n");
1198 if (prop_carrier_state)
1199 netif_carrier_on(dev);
1200 } else {
1201 port->phy_link = EHEA_PHY_LINK_DOWN;
1202 netif_info(port, link, dev,
1203 "Physical port down\n");
1204 if (prop_carrier_state)
1205 netif_carrier_off(dev);
1206 }
1207
1208 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1209 netdev_info(dev,
1210 "External switch port is primary port\n");
1211 else
1212 netdev_info(dev,
1213 "External switch port is backup port\n");
1214
1215 break;
1216 case EHEA_EC_ADAPTER_MALFUNC:
1217 netdev_err(dev, "Adapter malfunction\n");
1218 break;
1219 case EHEA_EC_PORT_MALFUNC:
1220 netdev_info(dev, "Port malfunction\n");
1221 netif_carrier_off(dev);
1222 netif_tx_disable(dev);
1223 break;
1224 default:
1225 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1226 break;
1227 }
1228 }
1229
1230 static void ehea_neq_tasklet(unsigned long data)
1231 {
1232 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1233 struct ehea_eqe *eqe;
1234 u64 event_mask;
1235
1236 eqe = ehea_poll_eq(adapter->neq);
1237 pr_debug("eqe=%p\n", eqe);
1238
1239 while (eqe) {
1240 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1241 ehea_parse_eqe(adapter, eqe->entry);
1242 eqe = ehea_poll_eq(adapter->neq);
1243 pr_debug("next eqe=%p\n", eqe);
1244 }
1245
1246 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1247 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1248 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1249
1250 ehea_h_reset_events(adapter->handle,
1251 adapter->neq->fw_handle, event_mask);
1252 }
1253
1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1255 {
1256 struct ehea_adapter *adapter = param;
1257 tasklet_hi_schedule(&adapter->neq_tasklet);
1258 return IRQ_HANDLED;
1259 }
1260
1261
1262 static int ehea_fill_port_res(struct ehea_port_res *pr)
1263 {
1264 int ret;
1265 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1266
1267 ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1268
1269 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1270
1271 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1272
1273 return ret;
1274 }
1275
1276 static int ehea_reg_interrupts(struct net_device *dev)
1277 {
1278 struct ehea_port *port = netdev_priv(dev);
1279 struct ehea_port_res *pr;
1280 int i, ret;
1281
1282
1283 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1284 dev->name);
1285
1286 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1287 ehea_qp_aff_irq_handler,
1288 IRQF_DISABLED, port->int_aff_name, port);
1289 if (ret) {
1290 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1291 port->qp_eq->attr.ist1);
1292 goto out_free_qpeq;
1293 }
1294
1295 netif_info(port, ifup, dev,
1296 "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1297 port->qp_eq->attr.ist1);
1298
1299
1300 for (i = 0; i < port->num_def_qps; i++) {
1301 pr = &port->port_res[i];
1302 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1303 "%s-queue%d", dev->name, i);
1304 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1305 ehea_recv_irq_handler,
1306 IRQF_DISABLED, pr->int_send_name,
1307 pr);
1308 if (ret) {
1309 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1310 i, pr->eq->attr.ist1);
1311 goto out_free_req;
1312 }
1313 netif_info(port, ifup, dev,
1314 "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1315 pr->eq->attr.ist1, i);
1316 }
1317 out:
1318 return ret;
1319
1320
1321 out_free_req:
1322 while (--i >= 0) {
1323 u32 ist = port->port_res[i].eq->attr.ist1;
1324 ibmebus_free_irq(ist, &port->port_res[i]);
1325 }
1326
1327 out_free_qpeq:
1328 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1329 i = port->num_def_qps;
1330
1331 goto out;
1332
1333 }
1334
1335 static void ehea_free_interrupts(struct net_device *dev)
1336 {
1337 struct ehea_port *port = netdev_priv(dev);
1338 struct ehea_port_res *pr;
1339 int i;
1340
1341 /* send */
1342
1343 for (i = 0; i < port->num_def_qps; i++) {
1344 pr = &port->port_res[i];
1345 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1346 netif_info(port, intr, dev,
1347 "free send irq for res %d with handle 0x%X\n",
1348 i, pr->eq->attr.ist1);
1349 }
1350
1351 /* associated events */
1352 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1353 netif_info(port, intr, dev,
1354 "associated event interrupt for handle 0x%X freed\n",
1355 port->qp_eq->attr.ist1);
1356 }
1357
1358 static int ehea_configure_port(struct ehea_port *port)
1359 {
1360 int ret, i;
1361 u64 hret, mask;
1362 struct hcp_ehea_port_cb0 *cb0;
1363
1364 ret = -ENOMEM;
1365 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1366 if (!cb0)
1367 goto out;
1368
1369 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1370 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1371 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1372 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1373 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1374 PXLY_RC_VLAN_FILTER)
1375 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1376
1377 for (i = 0; i < port->num_mcs; i++)
1378 if (use_mcs)
1379 cb0->default_qpn_arr[i] =
1380 port->port_res[i].qp->init_attr.qp_nr;
1381 else
1382 cb0->default_qpn_arr[i] =
1383 port->port_res[0].qp->init_attr.qp_nr;
1384
1385 if (netif_msg_ifup(port))
1386 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1387
1388 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1389 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1390
1391 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1392 port->logical_port_id,
1393 H_PORT_CB0, mask, cb0);
1394 ret = -EIO;
1395 if (hret != H_SUCCESS)
1396 goto out_free;
1397
1398 ret = 0;
1399
1400 out_free:
1401 free_page((unsigned long)cb0);
1402 out:
1403 return ret;
1404 }
1405
1406 int ehea_gen_smrs(struct ehea_port_res *pr)
1407 {
1408 int ret;
1409 struct ehea_adapter *adapter = pr->port->adapter;
1410
1411 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1412 if (ret)
1413 goto out;
1414
1415 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1416 if (ret)
1417 goto out_free;
1418
1419 return 0;
1420
1421 out_free:
1422 ehea_rem_mr(&pr->send_mr);
1423 out:
1424 pr_err("Generating SMRS failed\n");
1425 return -EIO;
1426 }
1427
1428 int ehea_rem_smrs(struct ehea_port_res *pr)
1429 {
1430 if ((ehea_rem_mr(&pr->send_mr)) ||
1431 (ehea_rem_mr(&pr->recv_mr)))
1432 return -EIO;
1433 else
1434 return 0;
1435 }
1436
1437 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1438 {
1439 int arr_size = sizeof(void *) * max_q_entries;
1440
1441 q_skba->arr = vzalloc(arr_size);
1442 if (!q_skba->arr)
1443 return -ENOMEM;
1444
1445 q_skba->len = max_q_entries;
1446 q_skba->index = 0;
1447 q_skba->os_skbs = 0;
1448
1449 return 0;
1450 }
1451
1452 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1453 struct port_res_cfg *pr_cfg, int queue_token)
1454 {
1455 struct ehea_adapter *adapter = port->adapter;
1456 enum ehea_eq_type eq_type = EHEA_EQ;
1457 struct ehea_qp_init_attr *init_attr = NULL;
1458 int ret = -EIO;
1459 u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1460
1461 tx_bytes = pr->tx_bytes;
1462 tx_packets = pr->tx_packets;
1463 rx_bytes = pr->rx_bytes;
1464 rx_packets = pr->rx_packets;
1465
1466 memset(pr, 0, sizeof(struct ehea_port_res));
1467
1468 pr->tx_bytes = rx_bytes;
1469 pr->tx_packets = tx_packets;
1470 pr->rx_bytes = rx_bytes;
1471 pr->rx_packets = rx_packets;
1472
1473 pr->port = port;
1474
1475 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1476 if (!pr->eq) {
1477 pr_err("create_eq failed (eq)\n");
1478 goto out_free;
1479 }
1480
1481 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1482 pr->eq->fw_handle,
1483 port->logical_port_id);
1484 if (!pr->recv_cq) {
1485 pr_err("create_cq failed (cq_recv)\n");
1486 goto out_free;
1487 }
1488
1489 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1490 pr->eq->fw_handle,
1491 port->logical_port_id);
1492 if (!pr->send_cq) {
1493 pr_err("create_cq failed (cq_send)\n");
1494 goto out_free;
1495 }
1496
1497 if (netif_msg_ifup(port))
1498 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1499 pr->send_cq->attr.act_nr_of_cqes,
1500 pr->recv_cq->attr.act_nr_of_cqes);
1501
1502 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1503 if (!init_attr) {
1504 ret = -ENOMEM;
1505 pr_err("no mem for ehea_qp_init_attr\n");
1506 goto out_free;
1507 }
1508
1509 init_attr->low_lat_rq1 = 1;
1510 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1511 init_attr->rq_count = 3;
1512 init_attr->qp_token = queue_token;
1513 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1514 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1515 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1516 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1517 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1518 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1519 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1520 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1521 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1522 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1523 init_attr->port_nr = port->logical_port_id;
1524 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1525 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1526 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1527
1528 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1529 if (!pr->qp) {
1530 pr_err("create_qp failed\n");
1531 ret = -EIO;
1532 goto out_free;
1533 }
1534
1535 if (netif_msg_ifup(port))
1536 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",
1537 init_attr->qp_nr,
1538 init_attr->act_nr_send_wqes,
1539 init_attr->act_nr_rwqes_rq1,
1540 init_attr->act_nr_rwqes_rq2,
1541 init_attr->act_nr_rwqes_rq3);
1542
1543 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1544
1545 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1546 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1547 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1548 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1549 if (ret)
1550 goto out_free;
1551
1552 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1553 if (ehea_gen_smrs(pr) != 0) {
1554 ret = -EIO;
1555 goto out_free;
1556 }
1557
1558 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1559
1560 kfree(init_attr);
1561
1562 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1563
1564 ret = 0;
1565 goto out;
1566
1567 out_free:
1568 kfree(init_attr);
1569 vfree(pr->sq_skba.arr);
1570 vfree(pr->rq1_skba.arr);
1571 vfree(pr->rq2_skba.arr);
1572 vfree(pr->rq3_skba.arr);
1573 ehea_destroy_qp(pr->qp);
1574 ehea_destroy_cq(pr->send_cq);
1575 ehea_destroy_cq(pr->recv_cq);
1576 ehea_destroy_eq(pr->eq);
1577 out:
1578 return ret;
1579 }
1580
1581 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1582 {
1583 int ret, i;
1584
1585 if (pr->qp)
1586 netif_napi_del(&pr->napi);
1587
1588 ret = ehea_destroy_qp(pr->qp);
1589
1590 if (!ret) {
1591 ehea_destroy_cq(pr->send_cq);
1592 ehea_destroy_cq(pr->recv_cq);
1593 ehea_destroy_eq(pr->eq);
1594
1595 for (i = 0; i < pr->rq1_skba.len; i++)
1596 if (pr->rq1_skba.arr[i])
1597 dev_kfree_skb(pr->rq1_skba.arr[i]);
1598
1599 for (i = 0; i < pr->rq2_skba.len; i++)
1600 if (pr->rq2_skba.arr[i])
1601 dev_kfree_skb(pr->rq2_skba.arr[i]);
1602
1603 for (i = 0; i < pr->rq3_skba.len; i++)
1604 if (pr->rq3_skba.arr[i])
1605 dev_kfree_skb(pr->rq3_skba.arr[i]);
1606
1607 for (i = 0; i < pr->sq_skba.len; i++)
1608 if (pr->sq_skba.arr[i])
1609 dev_kfree_skb(pr->sq_skba.arr[i]);
1610
1611 vfree(pr->rq1_skba.arr);
1612 vfree(pr->rq2_skba.arr);
1613 vfree(pr->rq3_skba.arr);
1614 vfree(pr->sq_skba.arr);
1615 ret = ehea_rem_smrs(pr);
1616 }
1617 return ret;
1618 }
1619
1620 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1621 u32 lkey)
1622 {
1623 int skb_data_size = skb_headlen(skb);
1624 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1625 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1626 unsigned int immediate_len = SWQE2_MAX_IMM;
1627
1628 swqe->descriptors = 0;
1629
1630 if (skb_is_gso(skb)) {
1631 swqe->tx_control |= EHEA_SWQE_TSO;
1632 swqe->mss = skb_shinfo(skb)->gso_size;
1633 /*
1634 * For TSO packets we only copy the headers into the
1635 * immediate area.
1636 */
1637 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1638 }
1639
1640 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1641 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1642 swqe->immediate_data_length = immediate_len;
1643
1644 if (skb_data_size > immediate_len) {
1645 sg1entry->l_key = lkey;
1646 sg1entry->len = skb_data_size - immediate_len;
1647 sg1entry->vaddr =
1648 ehea_map_vaddr(skb->data + immediate_len);
1649 swqe->descriptors++;
1650 }
1651 } else {
1652 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1653 swqe->immediate_data_length = skb_data_size;
1654 }
1655 }
1656
1657 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1658 struct ehea_swqe *swqe, u32 lkey)
1659 {
1660 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1661 skb_frag_t *frag;
1662 int nfrags, sg1entry_contains_frag_data, i;
1663
1664 nfrags = skb_shinfo(skb)->nr_frags;
1665 sg1entry = &swqe->u.immdata_desc.sg_entry;
1666 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1667 sg1entry_contains_frag_data = 0;
1668
1669 write_swqe2_immediate(skb, swqe, lkey);
1670
1671 /* write descriptors */
1672 if (nfrags > 0) {
1673 if (swqe->descriptors == 0) {
1674 /* sg1entry not yet used */
1675 frag = &skb_shinfo(skb)->frags[0];
1676
1677 /* copy sg1entry data */
1678 sg1entry->l_key = lkey;
1679 sg1entry->len = skb_frag_size(frag);
1680 sg1entry->vaddr =
1681 ehea_map_vaddr(skb_frag_address(frag));
1682 swqe->descriptors++;
1683 sg1entry_contains_frag_data = 1;
1684 }
1685
1686 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1687
1688 frag = &skb_shinfo(skb)->frags[i];
1689 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1690
1691 sgentry->l_key = lkey;
1692 sgentry->len = skb_frag_size(frag);
1693 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1694 swqe->descriptors++;
1695 }
1696 }
1697 }
1698
1699 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1700 {
1701 int ret = 0;
1702 u64 hret;
1703 u8 reg_type;
1704
1705 /* De/Register untagged packets */
1706 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1707 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1708 port->logical_port_id,
1709 reg_type, port->mac_addr, 0, hcallid);
1710 if (hret != H_SUCCESS) {
1711 pr_err("%sregistering bc address failed (tagged)\n",
1712 hcallid == H_REG_BCMC ? "" : "de");
1713 ret = -EIO;
1714 goto out_herr;
1715 }
1716
1717 /* De/Register VLAN packets */
1718 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
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 (vlan)\n",
1724 hcallid == H_REG_BCMC ? "" : "de");
1725 ret = -EIO;
1726 }
1727 out_herr:
1728 return ret;
1729 }
1730
1731 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1732 {
1733 struct ehea_port *port = netdev_priv(dev);
1734 struct sockaddr *mac_addr = sa;
1735 struct hcp_ehea_port_cb0 *cb0;
1736 int ret;
1737 u64 hret;
1738
1739 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1740 ret = -EADDRNOTAVAIL;
1741 goto out;
1742 }
1743
1744 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1745 if (!cb0) {
1746 pr_err("no mem for cb0\n");
1747 ret = -ENOMEM;
1748 goto out;
1749 }
1750
1751 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1752
1753 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1754
1755 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1756 port->logical_port_id, H_PORT_CB0,
1757 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1758 if (hret != H_SUCCESS) {
1759 ret = -EIO;
1760 goto out_free;
1761 }
1762
1763 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1764
1765 /* Deregister old MAC in pHYP */
1766 if (port->state == EHEA_PORT_UP) {
1767 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1768 if (ret)
1769 goto out_upregs;
1770 }
1771
1772 port->mac_addr = cb0->port_mac_addr << 16;
1773
1774 /* Register new MAC in pHYP */
1775 if (port->state == EHEA_PORT_UP) {
1776 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1777 if (ret)
1778 goto out_upregs;
1779 }
1780
1781 ret = 0;
1782
1783 out_upregs:
1784 ehea_update_bcmc_registrations();
1785 out_free:
1786 free_page((unsigned long)cb0);
1787 out:
1788 return ret;
1789 }
1790
1791 static void ehea_promiscuous_error(u64 hret, int enable)
1792 {
1793 if (hret == H_AUTHORITY)
1794 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1795 enable == 1 ? "en" : "dis");
1796 else
1797 pr_err("failed %sabling promiscuous mode\n",
1798 enable == 1 ? "en" : "dis");
1799 }
1800
1801 static void ehea_promiscuous(struct net_device *dev, int enable)
1802 {
1803 struct ehea_port *port = netdev_priv(dev);
1804 struct hcp_ehea_port_cb7 *cb7;
1805 u64 hret;
1806
1807 if (enable == port->promisc)
1808 return;
1809
1810 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1811 if (!cb7) {
1812 pr_err("no mem for cb7\n");
1813 goto out;
1814 }
1815
1816 /* Modify Pxs_DUCQPN in CB7 */
1817 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1818
1819 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1820 port->logical_port_id,
1821 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1822 if (hret) {
1823 ehea_promiscuous_error(hret, enable);
1824 goto out;
1825 }
1826
1827 port->promisc = enable;
1828 out:
1829 free_page((unsigned long)cb7);
1830 }
1831
1832 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1833 u32 hcallid)
1834 {
1835 u64 hret;
1836 u8 reg_type;
1837
1838 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1839 | EHEA_BCMC_UNTAGGED;
1840
1841 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1842 port->logical_port_id,
1843 reg_type, mc_mac_addr, 0, hcallid);
1844 if (hret)
1845 goto out;
1846
1847 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1848 | EHEA_BCMC_VLANID_ALL;
1849
1850 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1851 port->logical_port_id,
1852 reg_type, mc_mac_addr, 0, hcallid);
1853 out:
1854 return hret;
1855 }
1856
1857 static int ehea_drop_multicast_list(struct net_device *dev)
1858 {
1859 struct ehea_port *port = netdev_priv(dev);
1860 struct ehea_mc_list *mc_entry = port->mc_list;
1861 struct list_head *pos;
1862 struct list_head *temp;
1863 int ret = 0;
1864 u64 hret;
1865
1866 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1867 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1868
1869 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1870 H_DEREG_BCMC);
1871 if (hret) {
1872 pr_err("failed deregistering mcast MAC\n");
1873 ret = -EIO;
1874 }
1875
1876 list_del(pos);
1877 kfree(mc_entry);
1878 }
1879 return ret;
1880 }
1881
1882 static void ehea_allmulti(struct net_device *dev, int enable)
1883 {
1884 struct ehea_port *port = netdev_priv(dev);
1885 u64 hret;
1886
1887 if (!port->allmulti) {
1888 if (enable) {
1889 /* Enable ALLMULTI */
1890 ehea_drop_multicast_list(dev);
1891 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1892 if (!hret)
1893 port->allmulti = 1;
1894 else
1895 netdev_err(dev,
1896 "failed enabling IFF_ALLMULTI\n");
1897 }
1898 } else
1899 if (!enable) {
1900 /* Disable ALLMULTI */
1901 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1902 if (!hret)
1903 port->allmulti = 0;
1904 else
1905 netdev_err(dev,
1906 "failed disabling IFF_ALLMULTI\n");
1907 }
1908 }
1909
1910 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1911 {
1912 struct ehea_mc_list *ehea_mcl_entry;
1913 u64 hret;
1914
1915 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1916 if (!ehea_mcl_entry) {
1917 pr_err("no mem for mcl_entry\n");
1918 return;
1919 }
1920
1921 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1922
1923 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1924
1925 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1926 H_REG_BCMC);
1927 if (!hret)
1928 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1929 else {
1930 pr_err("failed registering mcast MAC\n");
1931 kfree(ehea_mcl_entry);
1932 }
1933 }
1934
1935 static void ehea_set_multicast_list(struct net_device *dev)
1936 {
1937 struct ehea_port *port = netdev_priv(dev);
1938 struct netdev_hw_addr *ha;
1939 int ret;
1940
1941 if (port->promisc) {
1942 ehea_promiscuous(dev, 1);
1943 return;
1944 }
1945 ehea_promiscuous(dev, 0);
1946
1947 if (dev->flags & IFF_ALLMULTI) {
1948 ehea_allmulti(dev, 1);
1949 goto out;
1950 }
1951 ehea_allmulti(dev, 0);
1952
1953 if (!netdev_mc_empty(dev)) {
1954 ret = ehea_drop_multicast_list(dev);
1955 if (ret) {
1956 /* Dropping the current multicast list failed.
1957 * Enabling ALL_MULTI is the best we can do.
1958 */
1959 ehea_allmulti(dev, 1);
1960 }
1961
1962 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1963 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1964 port->adapter->max_mc_mac);
1965 goto out;
1966 }
1967
1968 netdev_for_each_mc_addr(ha, dev)
1969 ehea_add_multicast_entry(port, ha->addr);
1970
1971 }
1972 out:
1973 ehea_update_bcmc_registrations();
1974 }
1975
1976 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1977 {
1978 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1979 return -EINVAL;
1980 dev->mtu = new_mtu;
1981 return 0;
1982 }
1983
1984 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1985 {
1986 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1987
1988 if (skb->protocol != htons(ETH_P_IP))
1989 return;
1990
1991 if (skb->ip_summed == CHECKSUM_PARTIAL)
1992 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1993
1994 swqe->ip_start = skb_network_offset(skb);
1995 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1996
1997 switch (ip_hdr(skb)->protocol) {
1998 case IPPROTO_UDP:
1999 if (skb->ip_summed == CHECKSUM_PARTIAL)
2000 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2001
2002 swqe->tcp_offset = swqe->ip_end + 1 +
2003 offsetof(struct udphdr, check);
2004 break;
2005
2006 case IPPROTO_TCP:
2007 if (skb->ip_summed == CHECKSUM_PARTIAL)
2008 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2009
2010 swqe->tcp_offset = swqe->ip_end + 1 +
2011 offsetof(struct tcphdr, check);
2012 break;
2013 }
2014 }
2015
2016 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2017 struct ehea_swqe *swqe, u32 lkey)
2018 {
2019 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2020
2021 xmit_common(skb, swqe);
2022
2023 write_swqe2_data(skb, dev, swqe, lkey);
2024 }
2025
2026 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2027 struct ehea_swqe *swqe)
2028 {
2029 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2030
2031 xmit_common(skb, swqe);
2032
2033 if (!skb->data_len)
2034 skb_copy_from_linear_data(skb, imm_data, skb->len);
2035 else
2036 skb_copy_bits(skb, 0, imm_data, skb->len);
2037
2038 swqe->immediate_data_length = skb->len;
2039 dev_kfree_skb(skb);
2040 }
2041
2042 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2043 {
2044 struct ehea_port *port = netdev_priv(dev);
2045 struct ehea_swqe *swqe;
2046 u32 lkey;
2047 int swqe_index;
2048 struct ehea_port_res *pr;
2049 struct netdev_queue *txq;
2050
2051 pr = &port->port_res[skb_get_queue_mapping(skb)];
2052 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2053
2054 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2055 memset(swqe, 0, SWQE_HEADER_SIZE);
2056 atomic_dec(&pr->swqe_avail);
2057
2058 if (vlan_tx_tag_present(skb)) {
2059 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2060 swqe->vlan_tag = vlan_tx_tag_get(skb);
2061 }
2062
2063 pr->tx_packets++;
2064 pr->tx_bytes += skb->len;
2065
2066 if (skb->len <= SWQE3_MAX_IMM) {
2067 u32 sig_iv = port->sig_comp_iv;
2068 u32 swqe_num = pr->swqe_id_counter;
2069 ehea_xmit3(skb, dev, swqe);
2070 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2071 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2072 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2073 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2074 sig_iv);
2075 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2076 pr->swqe_ll_count = 0;
2077 } else
2078 pr->swqe_ll_count += 1;
2079 } else {
2080 swqe->wr_id =
2081 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2082 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2083 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2084 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2085 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2086
2087 pr->sq_skba.index++;
2088 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2089
2090 lkey = pr->send_mr.lkey;
2091 ehea_xmit2(skb, dev, swqe, lkey);
2092 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2093 }
2094 pr->swqe_id_counter += 1;
2095
2096 netif_info(port, tx_queued, dev,
2097 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2098 if (netif_msg_tx_queued(port))
2099 ehea_dump(swqe, 512, "swqe");
2100
2101 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2102 netif_tx_stop_queue(txq);
2103 swqe->tx_control |= EHEA_SWQE_PURGE;
2104 }
2105
2106 ehea_post_swqe(pr->qp, swqe);
2107
2108 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2109 pr->p_stats.queue_stopped++;
2110 netif_tx_stop_queue(txq);
2111 }
2112
2113 return NETDEV_TX_OK;
2114 }
2115
2116 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2117 {
2118 struct ehea_port *port = netdev_priv(dev);
2119 struct ehea_adapter *adapter = port->adapter;
2120 struct hcp_ehea_port_cb1 *cb1;
2121 int index;
2122 u64 hret;
2123
2124 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2125 if (!cb1) {
2126 pr_err("no mem for cb1\n");
2127 goto out;
2128 }
2129
2130 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2131 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2132 if (hret != H_SUCCESS) {
2133 pr_err("query_ehea_port failed\n");
2134 goto out;
2135 }
2136
2137 index = (vid / 64);
2138 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2139
2140 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2141 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2142 if (hret != H_SUCCESS)
2143 pr_err("modify_ehea_port failed\n");
2144 out:
2145 free_page((unsigned long)cb1);
2146 return;
2147 }
2148
2149 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2150 {
2151 struct ehea_port *port = netdev_priv(dev);
2152 struct ehea_adapter *adapter = port->adapter;
2153 struct hcp_ehea_port_cb1 *cb1;
2154 int index;
2155 u64 hret;
2156
2157 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2158 if (!cb1) {
2159 pr_err("no mem for cb1\n");
2160 goto out;
2161 }
2162
2163 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2164 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2165 if (hret != H_SUCCESS) {
2166 pr_err("query_ehea_port failed\n");
2167 goto out;
2168 }
2169
2170 index = (vid / 64);
2171 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2172
2173 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2174 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2175 if (hret != H_SUCCESS)
2176 pr_err("modify_ehea_port failed\n");
2177 out:
2178 free_page((unsigned long)cb1);
2179 }
2180
2181 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2182 {
2183 int ret = -EIO;
2184 u64 hret;
2185 u16 dummy16 = 0;
2186 u64 dummy64 = 0;
2187 struct hcp_modify_qp_cb0 *cb0;
2188
2189 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2190 if (!cb0) {
2191 ret = -ENOMEM;
2192 goto out;
2193 }
2194
2195 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2196 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2197 if (hret != H_SUCCESS) {
2198 pr_err("query_ehea_qp failed (1)\n");
2199 goto out;
2200 }
2201
2202 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2203 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2204 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2205 &dummy64, &dummy64, &dummy16, &dummy16);
2206 if (hret != H_SUCCESS) {
2207 pr_err("modify_ehea_qp failed (1)\n");
2208 goto out;
2209 }
2210
2211 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2212 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2213 if (hret != H_SUCCESS) {
2214 pr_err("query_ehea_qp failed (2)\n");
2215 goto out;
2216 }
2217
2218 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2219 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2220 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2221 &dummy64, &dummy64, &dummy16, &dummy16);
2222 if (hret != H_SUCCESS) {
2223 pr_err("modify_ehea_qp failed (2)\n");
2224 goto out;
2225 }
2226
2227 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2228 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2229 if (hret != H_SUCCESS) {
2230 pr_err("query_ehea_qp failed (3)\n");
2231 goto out;
2232 }
2233
2234 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2235 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2236 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2237 &dummy64, &dummy64, &dummy16, &dummy16);
2238 if (hret != H_SUCCESS) {
2239 pr_err("modify_ehea_qp failed (3)\n");
2240 goto out;
2241 }
2242
2243 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2244 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2245 if (hret != H_SUCCESS) {
2246 pr_err("query_ehea_qp failed (4)\n");
2247 goto out;
2248 }
2249
2250 ret = 0;
2251 out:
2252 free_page((unsigned long)cb0);
2253 return ret;
2254 }
2255
2256 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2257 {
2258 int ret, i;
2259 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2260 enum ehea_eq_type eq_type = EHEA_EQ;
2261
2262 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2263 EHEA_MAX_ENTRIES_EQ, 1);
2264 if (!port->qp_eq) {
2265 ret = -EINVAL;
2266 pr_err("ehea_create_eq failed (qp_eq)\n");
2267 goto out_kill_eq;
2268 }
2269
2270 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2271 pr_cfg.max_entries_scq = sq_entries * 2;
2272 pr_cfg.max_entries_sq = sq_entries;
2273 pr_cfg.max_entries_rq1 = rq1_entries;
2274 pr_cfg.max_entries_rq2 = rq2_entries;
2275 pr_cfg.max_entries_rq3 = rq3_entries;
2276
2277 pr_cfg_small_rx.max_entries_rcq = 1;
2278 pr_cfg_small_rx.max_entries_scq = sq_entries;
2279 pr_cfg_small_rx.max_entries_sq = sq_entries;
2280 pr_cfg_small_rx.max_entries_rq1 = 1;
2281 pr_cfg_small_rx.max_entries_rq2 = 1;
2282 pr_cfg_small_rx.max_entries_rq3 = 1;
2283
2284 for (i = 0; i < def_qps; i++) {
2285 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2286 if (ret)
2287 goto out_clean_pr;
2288 }
2289 for (i = def_qps; i < def_qps; i++) {
2290 ret = ehea_init_port_res(port, &port->port_res[i],
2291 &pr_cfg_small_rx, i);
2292 if (ret)
2293 goto out_clean_pr;
2294 }
2295
2296 return 0;
2297
2298 out_clean_pr:
2299 while (--i >= 0)
2300 ehea_clean_portres(port, &port->port_res[i]);
2301
2302 out_kill_eq:
2303 ehea_destroy_eq(port->qp_eq);
2304 return ret;
2305 }
2306
2307 static int ehea_clean_all_portres(struct ehea_port *port)
2308 {
2309 int ret = 0;
2310 int i;
2311
2312 for (i = 0; i < port->num_def_qps; i++)
2313 ret |= ehea_clean_portres(port, &port->port_res[i]);
2314
2315 ret |= ehea_destroy_eq(port->qp_eq);
2316
2317 return ret;
2318 }
2319
2320 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2321 {
2322 if (adapter->active_ports)
2323 return;
2324
2325 ehea_rem_mr(&adapter->mr);
2326 }
2327
2328 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2329 {
2330 if (adapter->active_ports)
2331 return 0;
2332
2333 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2334 }
2335
2336 static int ehea_up(struct net_device *dev)
2337 {
2338 int ret, i;
2339 struct ehea_port *port = netdev_priv(dev);
2340
2341 if (port->state == EHEA_PORT_UP)
2342 return 0;
2343
2344 ret = ehea_port_res_setup(port, port->num_def_qps);
2345 if (ret) {
2346 netdev_err(dev, "port_res_failed\n");
2347 goto out;
2348 }
2349
2350 /* Set default QP for this port */
2351 ret = ehea_configure_port(port);
2352 if (ret) {
2353 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2354 goto out_clean_pr;
2355 }
2356
2357 ret = ehea_reg_interrupts(dev);
2358 if (ret) {
2359 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2360 goto out_clean_pr;
2361 }
2362
2363 for (i = 0; i < port->num_def_qps; i++) {
2364 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2365 if (ret) {
2366 netdev_err(dev, "activate_qp failed\n");
2367 goto out_free_irqs;
2368 }
2369 }
2370
2371 for (i = 0; i < port->num_def_qps; i++) {
2372 ret = ehea_fill_port_res(&port->port_res[i]);
2373 if (ret) {
2374 netdev_err(dev, "out_free_irqs\n");
2375 goto out_free_irqs;
2376 }
2377 }
2378
2379 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2380 if (ret) {
2381 ret = -EIO;
2382 goto out_free_irqs;
2383 }
2384
2385 port->state = EHEA_PORT_UP;
2386
2387 ret = 0;
2388 goto out;
2389
2390 out_free_irqs:
2391 ehea_free_interrupts(dev);
2392
2393 out_clean_pr:
2394 ehea_clean_all_portres(port);
2395 out:
2396 if (ret)
2397 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2398
2399 ehea_update_bcmc_registrations();
2400 ehea_update_firmware_handles();
2401
2402 return ret;
2403 }
2404
2405 static void port_napi_disable(struct ehea_port *port)
2406 {
2407 int i;
2408
2409 for (i = 0; i < port->num_def_qps; i++)
2410 napi_disable(&port->port_res[i].napi);
2411 }
2412
2413 static void port_napi_enable(struct ehea_port *port)
2414 {
2415 int i;
2416
2417 for (i = 0; i < port->num_def_qps; i++)
2418 napi_enable(&port->port_res[i].napi);
2419 }
2420
2421 static int ehea_open(struct net_device *dev)
2422 {
2423 int ret;
2424 struct ehea_port *port = netdev_priv(dev);
2425
2426 mutex_lock(&port->port_lock);
2427
2428 netif_info(port, ifup, dev, "enabling port\n");
2429
2430 ret = ehea_up(dev);
2431 if (!ret) {
2432 port_napi_enable(port);
2433 netif_tx_start_all_queues(dev);
2434 }
2435
2436 mutex_unlock(&port->port_lock);
2437 schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2438
2439 return ret;
2440 }
2441
2442 static int ehea_down(struct net_device *dev)
2443 {
2444 int ret;
2445 struct ehea_port *port = netdev_priv(dev);
2446
2447 if (port->state == EHEA_PORT_DOWN)
2448 return 0;
2449
2450 ehea_drop_multicast_list(dev);
2451 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2452
2453 ehea_free_interrupts(dev);
2454
2455 port->state = EHEA_PORT_DOWN;
2456
2457 ehea_update_bcmc_registrations();
2458
2459 ret = ehea_clean_all_portres(port);
2460 if (ret)
2461 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2462
2463 ehea_update_firmware_handles();
2464
2465 return ret;
2466 }
2467
2468 static int ehea_stop(struct net_device *dev)
2469 {
2470 int ret;
2471 struct ehea_port *port = netdev_priv(dev);
2472
2473 netif_info(port, ifdown, dev, "disabling port\n");
2474
2475 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2476 cancel_work_sync(&port->reset_task);
2477 cancel_delayed_work_sync(&port->stats_work);
2478 mutex_lock(&port->port_lock);
2479 netif_tx_stop_all_queues(dev);
2480 port_napi_disable(port);
2481 ret = ehea_down(dev);
2482 mutex_unlock(&port->port_lock);
2483 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2484 return ret;
2485 }
2486
2487 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2488 {
2489 struct ehea_qp qp = *orig_qp;
2490 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2491 struct ehea_swqe *swqe;
2492 int wqe_index;
2493 int i;
2494
2495 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2496 swqe = ehea_get_swqe(&qp, &wqe_index);
2497 swqe->tx_control |= EHEA_SWQE_PURGE;
2498 }
2499 }
2500
2501 static void ehea_flush_sq(struct ehea_port *port)
2502 {
2503 int i;
2504
2505 for (i = 0; i < port->num_def_qps; i++) {
2506 struct ehea_port_res *pr = &port->port_res[i];
2507 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2508 int ret;
2509
2510 ret = wait_event_timeout(port->swqe_avail_wq,
2511 atomic_read(&pr->swqe_avail) >= swqe_max,
2512 msecs_to_jiffies(100));
2513
2514 if (!ret) {
2515 pr_err("WARNING: sq not flushed completely\n");
2516 break;
2517 }
2518 }
2519 }
2520
2521 int ehea_stop_qps(struct net_device *dev)
2522 {
2523 struct ehea_port *port = netdev_priv(dev);
2524 struct ehea_adapter *adapter = port->adapter;
2525 struct hcp_modify_qp_cb0 *cb0;
2526 int ret = -EIO;
2527 int dret;
2528 int i;
2529 u64 hret;
2530 u64 dummy64 = 0;
2531 u16 dummy16 = 0;
2532
2533 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2534 if (!cb0) {
2535 ret = -ENOMEM;
2536 goto out;
2537 }
2538
2539 for (i = 0; i < (port->num_def_qps); i++) {
2540 struct ehea_port_res *pr = &port->port_res[i];
2541 struct ehea_qp *qp = pr->qp;
2542
2543 /* Purge send queue */
2544 ehea_purge_sq(qp);
2545
2546 /* Disable queue pair */
2547 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2548 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2549 cb0);
2550 if (hret != H_SUCCESS) {
2551 pr_err("query_ehea_qp failed (1)\n");
2552 goto out;
2553 }
2554
2555 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2556 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2557
2558 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2559 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2560 1), cb0, &dummy64,
2561 &dummy64, &dummy16, &dummy16);
2562 if (hret != H_SUCCESS) {
2563 pr_err("modify_ehea_qp failed (1)\n");
2564 goto out;
2565 }
2566
2567 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2568 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2569 cb0);
2570 if (hret != H_SUCCESS) {
2571 pr_err("query_ehea_qp failed (2)\n");
2572 goto out;
2573 }
2574
2575 /* deregister shared memory regions */
2576 dret = ehea_rem_smrs(pr);
2577 if (dret) {
2578 pr_err("unreg shared memory region failed\n");
2579 goto out;
2580 }
2581 }
2582
2583 ret = 0;
2584 out:
2585 free_page((unsigned long)cb0);
2586
2587 return ret;
2588 }
2589
2590 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2591 {
2592 struct ehea_qp qp = *orig_qp;
2593 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2594 struct ehea_rwqe *rwqe;
2595 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2596 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2597 struct sk_buff *skb;
2598 u32 lkey = pr->recv_mr.lkey;
2599
2600
2601 int i;
2602 int index;
2603
2604 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2605 rwqe = ehea_get_next_rwqe(&qp, 2);
2606 rwqe->sg_list[0].l_key = lkey;
2607 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2608 skb = skba_rq2[index];
2609 if (skb)
2610 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2611 }
2612
2613 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2614 rwqe = ehea_get_next_rwqe(&qp, 3);
2615 rwqe->sg_list[0].l_key = lkey;
2616 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2617 skb = skba_rq3[index];
2618 if (skb)
2619 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2620 }
2621 }
2622
2623 int ehea_restart_qps(struct net_device *dev)
2624 {
2625 struct ehea_port *port = netdev_priv(dev);
2626 struct ehea_adapter *adapter = port->adapter;
2627 int ret = 0;
2628 int i;
2629
2630 struct hcp_modify_qp_cb0 *cb0;
2631 u64 hret;
2632 u64 dummy64 = 0;
2633 u16 dummy16 = 0;
2634
2635 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2636 if (!cb0) {
2637 ret = -ENOMEM;
2638 goto out;
2639 }
2640
2641 for (i = 0; i < (port->num_def_qps); i++) {
2642 struct ehea_port_res *pr = &port->port_res[i];
2643 struct ehea_qp *qp = pr->qp;
2644
2645 ret = ehea_gen_smrs(pr);
2646 if (ret) {
2647 netdev_err(dev, "creation of shared memory regions failed\n");
2648 goto out;
2649 }
2650
2651 ehea_update_rqs(qp, pr);
2652
2653 /* Enable queue pair */
2654 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2655 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2656 cb0);
2657 if (hret != H_SUCCESS) {
2658 netdev_err(dev, "query_ehea_qp failed (1)\n");
2659 goto out;
2660 }
2661
2662 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2663 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2664
2665 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2666 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2667 1), cb0, &dummy64,
2668 &dummy64, &dummy16, &dummy16);
2669 if (hret != H_SUCCESS) {
2670 netdev_err(dev, "modify_ehea_qp failed (1)\n");
2671 goto out;
2672 }
2673
2674 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2675 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2676 cb0);
2677 if (hret != H_SUCCESS) {
2678 netdev_err(dev, "query_ehea_qp failed (2)\n");
2679 goto out;
2680 }
2681
2682 /* refill entire queue */
2683 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2684 ehea_refill_rq2(pr, 0);
2685 ehea_refill_rq3(pr, 0);
2686 }
2687 out:
2688 free_page((unsigned long)cb0);
2689
2690 return ret;
2691 }
2692
2693 static void ehea_reset_port(struct work_struct *work)
2694 {
2695 int ret;
2696 struct ehea_port *port =
2697 container_of(work, struct ehea_port, reset_task);
2698 struct net_device *dev = port->netdev;
2699
2700 mutex_lock(&dlpar_mem_lock);
2701 port->resets++;
2702 mutex_lock(&port->port_lock);
2703 netif_tx_disable(dev);
2704
2705 port_napi_disable(port);
2706
2707 ehea_down(dev);
2708
2709 ret = ehea_up(dev);
2710 if (ret)
2711 goto out;
2712
2713 ehea_set_multicast_list(dev);
2714
2715 netif_info(port, timer, dev, "reset successful\n");
2716
2717 port_napi_enable(port);
2718
2719 netif_tx_wake_all_queues(dev);
2720 out:
2721 mutex_unlock(&port->port_lock);
2722 mutex_unlock(&dlpar_mem_lock);
2723 }
2724
2725 static void ehea_rereg_mrs(void)
2726 {
2727 int ret, i;
2728 struct ehea_adapter *adapter;
2729
2730 pr_info("LPAR memory changed - re-initializing driver\n");
2731
2732 list_for_each_entry(adapter, &adapter_list, list)
2733 if (adapter->active_ports) {
2734 /* Shutdown all ports */
2735 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2736 struct ehea_port *port = adapter->port[i];
2737 struct net_device *dev;
2738
2739 if (!port)
2740 continue;
2741
2742 dev = port->netdev;
2743
2744 if (dev->flags & IFF_UP) {
2745 mutex_lock(&port->port_lock);
2746 netif_tx_disable(dev);
2747 ehea_flush_sq(port);
2748 ret = ehea_stop_qps(dev);
2749 if (ret) {
2750 mutex_unlock(&port->port_lock);
2751 goto out;
2752 }
2753 port_napi_disable(port);
2754 mutex_unlock(&port->port_lock);
2755 }
2756 reset_sq_restart_flag(port);
2757 }
2758
2759 /* Unregister old memory region */
2760 ret = ehea_rem_mr(&adapter->mr);
2761 if (ret) {
2762 pr_err("unregister MR failed - driver inoperable!\n");
2763 goto out;
2764 }
2765 }
2766
2767 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2768
2769 list_for_each_entry(adapter, &adapter_list, list)
2770 if (adapter->active_ports) {
2771 /* Register new memory region */
2772 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2773 if (ret) {
2774 pr_err("register MR failed - driver inoperable!\n");
2775 goto out;
2776 }
2777
2778 /* Restart all ports */
2779 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2780 struct ehea_port *port = adapter->port[i];
2781
2782 if (port) {
2783 struct net_device *dev = port->netdev;
2784
2785 if (dev->flags & IFF_UP) {
2786 mutex_lock(&port->port_lock);
2787 ret = ehea_restart_qps(dev);
2788 if (!ret) {
2789 check_sqs(port);
2790 port_napi_enable(port);
2791 netif_tx_wake_all_queues(dev);
2792 } else {
2793 netdev_err(dev, "Unable to restart QPS\n");
2794 }
2795 mutex_unlock(&port->port_lock);
2796 }
2797 }
2798 }
2799 }
2800 pr_info("re-initializing driver complete\n");
2801 out:
2802 return;
2803 }
2804
2805 static void ehea_tx_watchdog(struct net_device *dev)
2806 {
2807 struct ehea_port *port = netdev_priv(dev);
2808
2809 if (netif_carrier_ok(dev) &&
2810 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2811 ehea_schedule_port_reset(port);
2812 }
2813
2814 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2815 {
2816 struct hcp_query_ehea *cb;
2817 u64 hret;
2818 int ret;
2819
2820 cb = (void *)get_zeroed_page(GFP_KERNEL);
2821 if (!cb) {
2822 ret = -ENOMEM;
2823 goto out;
2824 }
2825
2826 hret = ehea_h_query_ehea(adapter->handle, cb);
2827
2828 if (hret != H_SUCCESS) {
2829 ret = -EIO;
2830 goto out_herr;
2831 }
2832
2833 adapter->max_mc_mac = cb->max_mc_mac - 1;
2834 ret = 0;
2835
2836 out_herr:
2837 free_page((unsigned long)cb);
2838 out:
2839 return ret;
2840 }
2841
2842 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2843 {
2844 struct hcp_ehea_port_cb4 *cb4;
2845 u64 hret;
2846 int ret = 0;
2847
2848 *jumbo = 0;
2849
2850 /* (Try to) enable *jumbo frames */
2851 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2852 if (!cb4) {
2853 pr_err("no mem for cb4\n");
2854 ret = -ENOMEM;
2855 goto out;
2856 } else {
2857 hret = ehea_h_query_ehea_port(port->adapter->handle,
2858 port->logical_port_id,
2859 H_PORT_CB4,
2860 H_PORT_CB4_JUMBO, cb4);
2861 if (hret == H_SUCCESS) {
2862 if (cb4->jumbo_frame)
2863 *jumbo = 1;
2864 else {
2865 cb4->jumbo_frame = 1;
2866 hret = ehea_h_modify_ehea_port(port->adapter->
2867 handle,
2868 port->
2869 logical_port_id,
2870 H_PORT_CB4,
2871 H_PORT_CB4_JUMBO,
2872 cb4);
2873 if (hret == H_SUCCESS)
2874 *jumbo = 1;
2875 }
2876 } else
2877 ret = -EINVAL;
2878
2879 free_page((unsigned long)cb4);
2880 }
2881 out:
2882 return ret;
2883 }
2884
2885 static ssize_t ehea_show_port_id(struct device *dev,
2886 struct device_attribute *attr, char *buf)
2887 {
2888 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2889 return sprintf(buf, "%d", port->logical_port_id);
2890 }
2891
2892 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2893 NULL);
2894
2895 static void __devinit logical_port_release(struct device *dev)
2896 {
2897 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2898 of_node_put(port->ofdev.dev.of_node);
2899 }
2900
2901 static struct device *ehea_register_port(struct ehea_port *port,
2902 struct device_node *dn)
2903 {
2904 int ret;
2905
2906 port->ofdev.dev.of_node = of_node_get(dn);
2907 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2908 port->ofdev.dev.bus = &ibmebus_bus_type;
2909
2910 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2911 port->ofdev.dev.release = logical_port_release;
2912
2913 ret = of_device_register(&port->ofdev);
2914 if (ret) {
2915 pr_err("failed to register device. ret=%d\n", ret);
2916 goto out;
2917 }
2918
2919 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2920 if (ret) {
2921 pr_err("failed to register attributes, ret=%d\n", ret);
2922 goto out_unreg_of_dev;
2923 }
2924
2925 return &port->ofdev.dev;
2926
2927 out_unreg_of_dev:
2928 of_device_unregister(&port->ofdev);
2929 out:
2930 return NULL;
2931 }
2932
2933 static void ehea_unregister_port(struct ehea_port *port)
2934 {
2935 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2936 of_device_unregister(&port->ofdev);
2937 }
2938
2939 static const struct net_device_ops ehea_netdev_ops = {
2940 .ndo_open = ehea_open,
2941 .ndo_stop = ehea_stop,
2942 .ndo_start_xmit = ehea_start_xmit,
2943 #ifdef CONFIG_NET_POLL_CONTROLLER
2944 .ndo_poll_controller = ehea_netpoll,
2945 #endif
2946 .ndo_get_stats64 = ehea_get_stats64,
2947 .ndo_set_mac_address = ehea_set_mac_addr,
2948 .ndo_validate_addr = eth_validate_addr,
2949 .ndo_set_rx_mode = ehea_set_multicast_list,
2950 .ndo_change_mtu = ehea_change_mtu,
2951 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
2952 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
2953 .ndo_tx_timeout = ehea_tx_watchdog,
2954 };
2955
2956 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2957 u32 logical_port_id,
2958 struct device_node *dn)
2959 {
2960 int ret;
2961 struct net_device *dev;
2962 struct ehea_port *port;
2963 struct device *port_dev;
2964 int jumbo;
2965
2966 /* allocate memory for the port structures */
2967 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2968
2969 if (!dev) {
2970 pr_err("no mem for net_device\n");
2971 ret = -ENOMEM;
2972 goto out_err;
2973 }
2974
2975 port = netdev_priv(dev);
2976
2977 mutex_init(&port->port_lock);
2978 port->state = EHEA_PORT_DOWN;
2979 port->sig_comp_iv = sq_entries / 10;
2980
2981 port->adapter = adapter;
2982 port->netdev = dev;
2983 port->logical_port_id = logical_port_id;
2984
2985 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2986
2987 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2988 if (!port->mc_list) {
2989 ret = -ENOMEM;
2990 goto out_free_ethdev;
2991 }
2992
2993 INIT_LIST_HEAD(&port->mc_list->list);
2994
2995 ret = ehea_sense_port_attr(port);
2996 if (ret)
2997 goto out_free_mc_list;
2998
2999 netif_set_real_num_rx_queues(dev, port->num_def_qps);
3000 netif_set_real_num_tx_queues(dev, port->num_def_qps);
3001
3002 port_dev = ehea_register_port(port, dn);
3003 if (!port_dev)
3004 goto out_free_mc_list;
3005
3006 SET_NETDEV_DEV(dev, port_dev);
3007
3008 /* initialize net_device structure */
3009 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3010
3011 dev->netdev_ops = &ehea_netdev_ops;
3012 ehea_set_ethtool_ops(dev);
3013
3014 dev->hw_features = NETIF_F_SG | NETIF_F_TSO
3015 | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3016 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3017 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3018 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3019 | NETIF_F_RXCSUM;
3020 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3021 NETIF_F_IP_CSUM;
3022 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3023
3024 INIT_WORK(&port->reset_task, ehea_reset_port);
3025 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3026
3027 init_waitqueue_head(&port->swqe_avail_wq);
3028 init_waitqueue_head(&port->restart_wq);
3029
3030 memset(&port->stats, 0, sizeof(struct net_device_stats));
3031 ret = register_netdev(dev);
3032 if (ret) {
3033 pr_err("register_netdev failed. ret=%d\n", ret);
3034 goto out_unreg_port;
3035 }
3036
3037 ret = ehea_get_jumboframe_status(port, &jumbo);
3038 if (ret)
3039 netdev_err(dev, "failed determining jumbo frame status\n");
3040
3041 netdev_info(dev, "Jumbo frames are %sabled\n",
3042 jumbo == 1 ? "en" : "dis");
3043
3044 adapter->active_ports++;
3045
3046 return port;
3047
3048 out_unreg_port:
3049 ehea_unregister_port(port);
3050
3051 out_free_mc_list:
3052 kfree(port->mc_list);
3053
3054 out_free_ethdev:
3055 free_netdev(dev);
3056
3057 out_err:
3058 pr_err("setting up logical port with id=%d failed, ret=%d\n",
3059 logical_port_id, ret);
3060 return NULL;
3061 }
3062
3063 static void ehea_shutdown_single_port(struct ehea_port *port)
3064 {
3065 struct ehea_adapter *adapter = port->adapter;
3066
3067 cancel_work_sync(&port->reset_task);
3068 cancel_delayed_work_sync(&port->stats_work);
3069 unregister_netdev(port->netdev);
3070 ehea_unregister_port(port);
3071 kfree(port->mc_list);
3072 free_netdev(port->netdev);
3073 adapter->active_ports--;
3074 }
3075
3076 static int ehea_setup_ports(struct ehea_adapter *adapter)
3077 {
3078 struct device_node *lhea_dn;
3079 struct device_node *eth_dn = NULL;
3080
3081 const u32 *dn_log_port_id;
3082 int i = 0;
3083
3084 lhea_dn = adapter->ofdev->dev.of_node;
3085 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3086
3087 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3088 NULL);
3089 if (!dn_log_port_id) {
3090 pr_err("bad device node: eth_dn name=%s\n",
3091 eth_dn->full_name);
3092 continue;
3093 }
3094
3095 if (ehea_add_adapter_mr(adapter)) {
3096 pr_err("creating MR failed\n");
3097 of_node_put(eth_dn);
3098 return -EIO;
3099 }
3100
3101 adapter->port[i] = ehea_setup_single_port(adapter,
3102 *dn_log_port_id,
3103 eth_dn);
3104 if (adapter->port[i])
3105 netdev_info(adapter->port[i]->netdev,
3106 "logical port id #%d\n", *dn_log_port_id);
3107 else
3108 ehea_remove_adapter_mr(adapter);
3109
3110 i++;
3111 }
3112 return 0;
3113 }
3114
3115 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3116 u32 logical_port_id)
3117 {
3118 struct device_node *lhea_dn;
3119 struct device_node *eth_dn = NULL;
3120 const u32 *dn_log_port_id;
3121
3122 lhea_dn = adapter->ofdev->dev.of_node;
3123 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3124
3125 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3126 NULL);
3127 if (dn_log_port_id)
3128 if (*dn_log_port_id == logical_port_id)
3129 return eth_dn;
3130 }
3131
3132 return NULL;
3133 }
3134
3135 static ssize_t ehea_probe_port(struct device *dev,
3136 struct device_attribute *attr,
3137 const char *buf, size_t count)
3138 {
3139 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3140 struct ehea_port *port;
3141 struct device_node *eth_dn = NULL;
3142 int i;
3143
3144 u32 logical_port_id;
3145
3146 sscanf(buf, "%d", &logical_port_id);
3147
3148 port = ehea_get_port(adapter, logical_port_id);
3149
3150 if (port) {
3151 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3152 logical_port_id);
3153 return -EINVAL;
3154 }
3155
3156 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3157
3158 if (!eth_dn) {
3159 pr_info("no logical port with id %d found\n", logical_port_id);
3160 return -EINVAL;
3161 }
3162
3163 if (ehea_add_adapter_mr(adapter)) {
3164 pr_err("creating MR failed\n");
3165 return -EIO;
3166 }
3167
3168 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3169
3170 of_node_put(eth_dn);
3171
3172 if (port) {
3173 for (i = 0; i < EHEA_MAX_PORTS; i++)
3174 if (!adapter->port[i]) {
3175 adapter->port[i] = port;
3176 break;
3177 }
3178
3179 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3180 logical_port_id);
3181 } else {
3182 ehea_remove_adapter_mr(adapter);
3183 return -EIO;
3184 }
3185
3186 return (ssize_t) count;
3187 }
3188
3189 static ssize_t ehea_remove_port(struct device *dev,
3190 struct device_attribute *attr,
3191 const char *buf, size_t count)
3192 {
3193 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3194 struct ehea_port *port;
3195 int i;
3196 u32 logical_port_id;
3197
3198 sscanf(buf, "%d", &logical_port_id);
3199
3200 port = ehea_get_port(adapter, logical_port_id);
3201
3202 if (port) {
3203 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3204 logical_port_id);
3205
3206 ehea_shutdown_single_port(port);
3207
3208 for (i = 0; i < EHEA_MAX_PORTS; i++)
3209 if (adapter->port[i] == port) {
3210 adapter->port[i] = NULL;
3211 break;
3212 }
3213 } else {
3214 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3215 logical_port_id);
3216 return -EINVAL;
3217 }
3218
3219 ehea_remove_adapter_mr(adapter);
3220
3221 return (ssize_t) count;
3222 }
3223
3224 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3225 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3226
3227 int ehea_create_device_sysfs(struct platform_device *dev)
3228 {
3229 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3230 if (ret)
3231 goto out;
3232
3233 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3234 out:
3235 return ret;
3236 }
3237
3238 void ehea_remove_device_sysfs(struct platform_device *dev)
3239 {
3240 device_remove_file(&dev->dev, &dev_attr_probe_port);
3241 device_remove_file(&dev->dev, &dev_attr_remove_port);
3242 }
3243
3244 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3245 const struct of_device_id *id)
3246 {
3247 struct ehea_adapter *adapter;
3248 const u64 *adapter_handle;
3249 int ret;
3250
3251 if (!dev || !dev->dev.of_node) {
3252 pr_err("Invalid ibmebus device probed\n");
3253 return -EINVAL;
3254 }
3255
3256 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3257 if (!adapter) {
3258 ret = -ENOMEM;
3259 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3260 goto out;
3261 }
3262
3263 list_add(&adapter->list, &adapter_list);
3264
3265 adapter->ofdev = dev;
3266
3267 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3268 NULL);
3269 if (adapter_handle)
3270 adapter->handle = *adapter_handle;
3271
3272 if (!adapter->handle) {
3273 dev_err(&dev->dev, "failed getting handle for adapter"
3274 " '%s'\n", dev->dev.of_node->full_name);
3275 ret = -ENODEV;
3276 goto out_free_ad;
3277 }
3278
3279 adapter->pd = EHEA_PD_ID;
3280
3281 dev_set_drvdata(&dev->dev, adapter);
3282
3283
3284 /* initialize adapter and ports */
3285 /* get adapter properties */
3286 ret = ehea_sense_adapter_attr(adapter);
3287 if (ret) {
3288 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3289 goto out_free_ad;
3290 }
3291
3292 adapter->neq = ehea_create_eq(adapter,
3293 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3294 if (!adapter->neq) {
3295 ret = -EIO;
3296 dev_err(&dev->dev, "NEQ creation failed\n");
3297 goto out_free_ad;
3298 }
3299
3300 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3301 (unsigned long)adapter);
3302
3303 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3304 ehea_interrupt_neq, IRQF_DISABLED,
3305 "ehea_neq", adapter);
3306 if (ret) {
3307 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3308 goto out_kill_eq;
3309 }
3310
3311 ret = ehea_create_device_sysfs(dev);
3312 if (ret)
3313 goto out_free_irq;
3314
3315 ret = ehea_setup_ports(adapter);
3316 if (ret) {
3317 dev_err(&dev->dev, "setup_ports failed\n");
3318 goto out_rem_dev_sysfs;
3319 }
3320
3321 ret = 0;
3322 goto out;
3323
3324 out_rem_dev_sysfs:
3325 ehea_remove_device_sysfs(dev);
3326
3327 out_free_irq:
3328 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3329
3330 out_kill_eq:
3331 ehea_destroy_eq(adapter->neq);
3332
3333 out_free_ad:
3334 list_del(&adapter->list);
3335 kfree(adapter);
3336
3337 out:
3338 ehea_update_firmware_handles();
3339
3340 return ret;
3341 }
3342
3343 static int __devexit ehea_remove(struct platform_device *dev)
3344 {
3345 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3346 int i;
3347
3348 for (i = 0; i < EHEA_MAX_PORTS; i++)
3349 if (adapter->port[i]) {
3350 ehea_shutdown_single_port(adapter->port[i]);
3351 adapter->port[i] = NULL;
3352 }
3353
3354 ehea_remove_device_sysfs(dev);
3355
3356 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3357 tasklet_kill(&adapter->neq_tasklet);
3358
3359 ehea_destroy_eq(adapter->neq);
3360 ehea_remove_adapter_mr(adapter);
3361 list_del(&adapter->list);
3362 kfree(adapter);
3363
3364 ehea_update_firmware_handles();
3365
3366 return 0;
3367 }
3368
3369 void ehea_crash_handler(void)
3370 {
3371 int i;
3372
3373 if (ehea_fw_handles.arr)
3374 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3375 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3376 ehea_fw_handles.arr[i].fwh,
3377 FORCE_FREE);
3378
3379 if (ehea_bcmc_regs.arr)
3380 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3381 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3382 ehea_bcmc_regs.arr[i].port_id,
3383 ehea_bcmc_regs.arr[i].reg_type,
3384 ehea_bcmc_regs.arr[i].macaddr,
3385 0, H_DEREG_BCMC);
3386 }
3387
3388 static int ehea_mem_notifier(struct notifier_block *nb,
3389 unsigned long action, void *data)
3390 {
3391 int ret = NOTIFY_BAD;
3392 struct memory_notify *arg = data;
3393
3394 mutex_lock(&dlpar_mem_lock);
3395
3396 switch (action) {
3397 case MEM_CANCEL_OFFLINE:
3398 pr_info("memory offlining canceled");
3399 /* Readd canceled memory block */
3400 case MEM_ONLINE:
3401 pr_info("memory is going online");
3402 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3403 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3404 goto out_unlock;
3405 ehea_rereg_mrs();
3406 break;
3407 case MEM_GOING_OFFLINE:
3408 pr_info("memory is going offline");
3409 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3410 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3411 goto out_unlock;
3412 ehea_rereg_mrs();
3413 break;
3414 default:
3415 break;
3416 }
3417
3418 ehea_update_firmware_handles();
3419 ret = NOTIFY_OK;
3420
3421 out_unlock:
3422 mutex_unlock(&dlpar_mem_lock);
3423 return ret;
3424 }
3425
3426 static struct notifier_block ehea_mem_nb = {
3427 .notifier_call = ehea_mem_notifier,
3428 };
3429
3430 static int ehea_reboot_notifier(struct notifier_block *nb,
3431 unsigned long action, void *unused)
3432 {
3433 if (action == SYS_RESTART) {
3434 pr_info("Reboot: freeing all eHEA resources\n");
3435 ibmebus_unregister_driver(&ehea_driver);
3436 }
3437 return NOTIFY_DONE;
3438 }
3439
3440 static struct notifier_block ehea_reboot_nb = {
3441 .notifier_call = ehea_reboot_notifier,
3442 };
3443
3444 static int check_module_parm(void)
3445 {
3446 int ret = 0;
3447
3448 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3449 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3450 pr_info("Bad parameter: rq1_entries\n");
3451 ret = -EINVAL;
3452 }
3453 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3454 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3455 pr_info("Bad parameter: rq2_entries\n");
3456 ret = -EINVAL;
3457 }
3458 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3459 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3460 pr_info("Bad parameter: rq3_entries\n");
3461 ret = -EINVAL;
3462 }
3463 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3464 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3465 pr_info("Bad parameter: sq_entries\n");
3466 ret = -EINVAL;
3467 }
3468
3469 return ret;
3470 }
3471
3472 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3473 char *buf)
3474 {
3475 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3476 }
3477
3478 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3479 ehea_show_capabilities, NULL);
3480
3481 int __init ehea_module_init(void)
3482 {
3483 int ret;
3484
3485 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3486
3487 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3488 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3489
3490 mutex_init(&ehea_fw_handles.lock);
3491 spin_lock_init(&ehea_bcmc_regs.lock);
3492
3493 ret = check_module_parm();
3494 if (ret)
3495 goto out;
3496
3497 ret = ehea_create_busmap();
3498 if (ret)
3499 goto out;
3500
3501 ret = register_reboot_notifier(&ehea_reboot_nb);
3502 if (ret)
3503 pr_info("failed registering reboot notifier\n");
3504
3505 ret = register_memory_notifier(&ehea_mem_nb);
3506 if (ret)
3507 pr_info("failed registering memory remove notifier\n");
3508
3509 ret = crash_shutdown_register(ehea_crash_handler);
3510 if (ret)
3511 pr_info("failed registering crash handler\n");
3512
3513 ret = ibmebus_register_driver(&ehea_driver);
3514 if (ret) {
3515 pr_err("failed registering eHEA device driver on ebus\n");
3516 goto out2;
3517 }
3518
3519 ret = driver_create_file(&ehea_driver.driver,
3520 &driver_attr_capabilities);
3521 if (ret) {
3522 pr_err("failed to register capabilities attribute, ret=%d\n",
3523 ret);
3524 goto out3;
3525 }
3526
3527 return ret;
3528
3529 out3:
3530 ibmebus_unregister_driver(&ehea_driver);
3531 out2:
3532 unregister_memory_notifier(&ehea_mem_nb);
3533 unregister_reboot_notifier(&ehea_reboot_nb);
3534 crash_shutdown_unregister(ehea_crash_handler);
3535 out:
3536 return ret;
3537 }
3538
3539 static void __exit ehea_module_exit(void)
3540 {
3541 int ret;
3542
3543 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3544 ibmebus_unregister_driver(&ehea_driver);
3545 unregister_reboot_notifier(&ehea_reboot_nb);
3546 ret = crash_shutdown_unregister(ehea_crash_handler);
3547 if (ret)
3548 pr_info("failed unregistering crash handler\n");
3549 unregister_memory_notifier(&ehea_mem_nb);
3550 kfree(ehea_fw_handles.arr);
3551 kfree(ehea_bcmc_regs.arr);
3552 ehea_destroy_busmap();
3553 }
3554
3555 module_init(ehea_module_init);
3556 module_exit(ehea_module_exit);
Linux Btrfs Development