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ehea: Fix workqueue handling
[deliverable/linux.git] / drivers / net / ehea / ehea_main.c
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 #include <linux/in.h>
30 #include <linux/ip.h>
31 #include <linux/tcp.h>
32 #include <linux/udp.h>
33 #include <linux/if.h>
34 #include <linux/list.h>
35 #include <linux/if_ether.h>
36 #include <net/ip.h>
37
38 #include "ehea.h"
39 #include "ehea_qmr.h"
40 #include "ehea_phyp.h"
41
42
43 MODULE_LICENSE("GPL");
44 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
45 MODULE_DESCRIPTION("IBM eServer HEA Driver");
46 MODULE_VERSION(DRV_VERSION);
47
48
49 static int msg_level = -1;
50 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
51 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
52 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
53 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
54 static int use_mcs = 0;
55 static int num_tx_qps = EHEA_NUM_TX_QP;
56
57 module_param(msg_level, int, 0);
58 module_param(rq1_entries, int, 0);
59 module_param(rq2_entries, int, 0);
60 module_param(rq3_entries, int, 0);
61 module_param(sq_entries, int, 0);
62 module_param(use_mcs, int, 0);
63 module_param(num_tx_qps, int, 0);
64
65 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
66 MODULE_PARM_DESC(msg_level, "msg_level");
67 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
68 "[2^x - 1], x = [6..14]. Default = "
69 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
70 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
71 "[2^x - 1], x = [6..14]. Default = "
72 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
73 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
74 "[2^x - 1], x = [6..14]. Default = "
75 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
76 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
77 "[2^x - 1], x = [6..14]. Default = "
78 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
79 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 1 ");
80
81 static int port_name_cnt = 0;
82 static LIST_HEAD(adapter_list);
83 u64 ehea_driver_flags = 0;
84 struct workqueue_struct *ehea_driver_wq;
85 struct work_struct ehea_rereg_mr_task;
86
87
88 static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
89 const struct of_device_id *id);
90
91 static int __devexit ehea_remove(struct ibmebus_dev *dev);
92
93 static struct of_device_id ehea_device_table[] = {
94 {
95 .name = "lhea",
96 .compatible = "IBM,lhea",
97 },
98 {},
99 };
100
101 static struct ibmebus_driver ehea_driver = {
102 .name = "ehea",
103 .id_table = ehea_device_table,
104 .probe = ehea_probe_adapter,
105 .remove = ehea_remove,
106 };
107
108 void ehea_dump(void *adr, int len, char *msg) {
109 int x;
110 unsigned char *deb = adr;
111 for (x = 0; x < len; x += 16) {
112 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
113 deb, x, *((u64*)&deb[0]), *((u64*)&deb[8]));
114 deb += 16;
115 }
116 }
117
118 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
119 {
120 struct ehea_port *port = netdev_priv(dev);
121 struct net_device_stats *stats = &port->stats;
122 struct hcp_ehea_port_cb2 *cb2;
123 u64 hret, rx_packets;
124 int i;
125
126 memset(stats, 0, sizeof(*stats));
127
128 cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
129 if (!cb2) {
130 ehea_error("no mem for cb2");
131 goto out;
132 }
133
134 hret = ehea_h_query_ehea_port(port->adapter->handle,
135 port->logical_port_id,
136 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
137 if (hret != H_SUCCESS) {
138 ehea_error("query_ehea_port failed");
139 goto out_herr;
140 }
141
142 if (netif_msg_hw(port))
143 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
144
145 rx_packets = 0;
146 for (i = 0; i < port->num_def_qps; i++)
147 rx_packets += port->port_res[i].rx_packets;
148
149 stats->tx_packets = cb2->txucp + cb2->txmcp + cb2->txbcp;
150 stats->multicast = cb2->rxmcp;
151 stats->rx_errors = cb2->rxuerr;
152 stats->rx_bytes = cb2->rxo;
153 stats->tx_bytes = cb2->txo;
154 stats->rx_packets = rx_packets;
155
156 out_herr:
157 kfree(cb2);
158 out:
159 return stats;
160 }
161
162 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
163 {
164 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
165 struct net_device *dev = pr->port->netdev;
166 int max_index_mask = pr->rq1_skba.len - 1;
167 int i;
168
169 if (!nr_of_wqes)
170 return;
171
172 for (i = 0; i < nr_of_wqes; i++) {
173 if (!skb_arr_rq1[index]) {
174 skb_arr_rq1[index] = netdev_alloc_skb(dev,
175 EHEA_L_PKT_SIZE);
176 if (!skb_arr_rq1[index]) {
177 ehea_error("%s: no mem for skb/%d wqes filled",
178 dev->name, i);
179 break;
180 }
181 }
182 index--;
183 index &= max_index_mask;
184 }
185 /* Ring doorbell */
186 ehea_update_rq1a(pr->qp, i);
187 }
188
189 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
190 {
191 int ret = 0;
192 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
193 struct net_device *dev = pr->port->netdev;
194 int i;
195
196 for (i = 0; i < pr->rq1_skba.len; i++) {
197 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
198 if (!skb_arr_rq1[i]) {
199 ehea_error("%s: no mem for skb/%d wqes filled",
200 dev->name, i);
201 ret = -ENOMEM;
202 goto out;
203 }
204 }
205 /* Ring doorbell */
206 ehea_update_rq1a(pr->qp, nr_rq1a);
207 out:
208 return ret;
209 }
210
211 static int ehea_refill_rq_def(struct ehea_port_res *pr,
212 struct ehea_q_skb_arr *q_skba, int rq_nr,
213 int num_wqes, int wqe_type, int packet_size)
214 {
215 struct net_device *dev = pr->port->netdev;
216 struct ehea_qp *qp = pr->qp;
217 struct sk_buff **skb_arr = q_skba->arr;
218 struct ehea_rwqe *rwqe;
219 int i, index, max_index_mask, fill_wqes;
220 int ret = 0;
221
222 fill_wqes = q_skba->os_skbs + num_wqes;
223
224 if (!fill_wqes)
225 return ret;
226
227 index = q_skba->index;
228 max_index_mask = q_skba->len - 1;
229 for (i = 0; i < fill_wqes; i++) {
230 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
231 if (!skb) {
232 ehea_error("%s: no mem for skb/%d wqes filled",
233 pr->port->netdev->name, i);
234 q_skba->os_skbs = fill_wqes - i;
235 ret = -ENOMEM;
236 break;
237 }
238 skb_reserve(skb, NET_IP_ALIGN);
239
240 skb_arr[index] = skb;
241
242 rwqe = ehea_get_next_rwqe(qp, rq_nr);
243 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
244 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
245 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
246 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
247 rwqe->sg_list[0].len = packet_size;
248 rwqe->data_segments = 1;
249
250 index++;
251 index &= max_index_mask;
252
253 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)))
254 goto out;
255 }
256
257 q_skba->index = index;
258
259 /* Ring doorbell */
260 iosync();
261 if (rq_nr == 2)
262 ehea_update_rq2a(pr->qp, i);
263 else
264 ehea_update_rq3a(pr->qp, i);
265 out:
266 return ret;
267 }
268
269
270 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
271 {
272 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
273 nr_of_wqes, EHEA_RWQE2_TYPE,
274 EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
275 }
276
277
278 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
279 {
280 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
281 nr_of_wqes, EHEA_RWQE3_TYPE,
282 EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
283 }
284
285 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
286 {
287 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
288 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
289 return 0;
290 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
291 (cqe->header_length == 0))
292 return 0;
293 return -EINVAL;
294 }
295
296 static inline void ehea_fill_skb(struct net_device *dev,
297 struct sk_buff *skb, struct ehea_cqe *cqe)
298 {
299 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
300
301 skb_put(skb, length);
302 skb->ip_summed = CHECKSUM_UNNECESSARY;
303 skb->protocol = eth_type_trans(skb, dev);
304 }
305
306 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
307 int arr_len,
308 struct ehea_cqe *cqe)
309 {
310 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
311 struct sk_buff *skb;
312 void *pref;
313 int x;
314
315 x = skb_index + 1;
316 x &= (arr_len - 1);
317
318 pref = skb_array[x];
319 prefetchw(pref);
320 prefetchw(pref + EHEA_CACHE_LINE);
321
322 pref = (skb_array[x]->data);
323 prefetch(pref);
324 prefetch(pref + EHEA_CACHE_LINE);
325 prefetch(pref + EHEA_CACHE_LINE * 2);
326 prefetch(pref + EHEA_CACHE_LINE * 3);
327 skb = skb_array[skb_index];
328 skb_array[skb_index] = NULL;
329 return skb;
330 }
331
332 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
333 int arr_len, int wqe_index)
334 {
335 struct sk_buff *skb;
336 void *pref;
337 int x;
338
339 x = wqe_index + 1;
340 x &= (arr_len - 1);
341
342 pref = skb_array[x];
343 prefetchw(pref);
344 prefetchw(pref + EHEA_CACHE_LINE);
345
346 pref = (skb_array[x]->data);
347 prefetchw(pref);
348 prefetchw(pref + EHEA_CACHE_LINE);
349
350 skb = skb_array[wqe_index];
351 skb_array[wqe_index] = NULL;
352 return skb;
353 }
354
355 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
356 struct ehea_cqe *cqe, int *processed_rq2,
357 int *processed_rq3)
358 {
359 struct sk_buff *skb;
360
361 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
362 pr->p_stats.err_tcp_cksum++;
363 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
364 pr->p_stats.err_ip_cksum++;
365 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
366 pr->p_stats.err_frame_crc++;
367
368 if (netif_msg_rx_err(pr->port)) {
369 ehea_error("CQE Error for QP %d", pr->qp->init_attr.qp_nr);
370 ehea_dump(cqe, sizeof(*cqe), "CQE");
371 }
372
373 if (rq == 2) {
374 *processed_rq2 += 1;
375 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
376 dev_kfree_skb(skb);
377 } else if (rq == 3) {
378 *processed_rq3 += 1;
379 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
380 dev_kfree_skb(skb);
381 }
382
383 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
384 ehea_error("Critical receive error. Resetting port.");
385 queue_work(pr->port->adapter->ehea_wq, &pr->port->reset_task);
386 return 1;
387 }
388
389 return 0;
390 }
391
392 static struct ehea_cqe *ehea_proc_rwqes(struct net_device *dev,
393 struct ehea_port_res *pr,
394 int *budget)
395 {
396 struct ehea_port *port = pr->port;
397 struct ehea_qp *qp = pr->qp;
398 struct ehea_cqe *cqe;
399 struct sk_buff *skb;
400 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
401 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
402 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
403 int skb_arr_rq1_len = pr->rq1_skba.len;
404 int skb_arr_rq2_len = pr->rq2_skba.len;
405 int skb_arr_rq3_len = pr->rq3_skba.len;
406 int processed, processed_rq1, processed_rq2, processed_rq3;
407 int wqe_index, last_wqe_index, rq, my_quota, port_reset;
408
409 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
410 last_wqe_index = 0;
411 my_quota = min(*budget, dev->quota);
412
413 cqe = ehea_poll_rq1(qp, &wqe_index);
414 while ((my_quota > 0) && cqe) {
415 ehea_inc_rq1(qp);
416 processed_rq1++;
417 processed++;
418 my_quota--;
419 if (netif_msg_rx_status(port))
420 ehea_dump(cqe, sizeof(*cqe), "CQE");
421
422 last_wqe_index = wqe_index;
423 rmb();
424 if (!ehea_check_cqe(cqe, &rq)) {
425 if (rq == 1) { /* LL RQ1 */
426 skb = get_skb_by_index_ll(skb_arr_rq1,
427 skb_arr_rq1_len,
428 wqe_index);
429 if (unlikely(!skb)) {
430 if (netif_msg_rx_err(port))
431 ehea_error("LL rq1: skb=NULL");
432
433 skb = netdev_alloc_skb(port->netdev,
434 EHEA_L_PKT_SIZE);
435 if (!skb)
436 break;
437 }
438 skb_copy_to_linear_data(skb, ((char*)cqe) + 64,
439 cqe->num_bytes_transfered - 4);
440 ehea_fill_skb(port->netdev, skb, cqe);
441 } else if (rq == 2) { /* RQ2 */
442 skb = get_skb_by_index(skb_arr_rq2,
443 skb_arr_rq2_len, cqe);
444 if (unlikely(!skb)) {
445 if (netif_msg_rx_err(port))
446 ehea_error("rq2: skb=NULL");
447 break;
448 }
449 ehea_fill_skb(port->netdev, skb, cqe);
450 processed_rq2++;
451 } else { /* RQ3 */
452 skb = get_skb_by_index(skb_arr_rq3,
453 skb_arr_rq3_len, cqe);
454 if (unlikely(!skb)) {
455 if (netif_msg_rx_err(port))
456 ehea_error("rq3: skb=NULL");
457 break;
458 }
459 ehea_fill_skb(port->netdev, skb, cqe);
460 processed_rq3++;
461 }
462
463 if ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
464 && port->vgrp)
465 vlan_hwaccel_receive_skb(skb, port->vgrp,
466 cqe->vlan_tag);
467 else
468 netif_receive_skb(skb);
469
470 dev->last_rx = jiffies;
471 } else {
472 pr->p_stats.poll_receive_errors++;
473 port_reset = ehea_treat_poll_error(pr, rq, cqe,
474 &processed_rq2,
475 &processed_rq3);
476 if (port_reset)
477 break;
478 }
479 cqe = ehea_poll_rq1(qp, &wqe_index);
480 }
481
482 pr->rx_packets += processed;
483 *budget -= processed;
484
485 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
486 ehea_refill_rq2(pr, processed_rq2);
487 ehea_refill_rq3(pr, processed_rq3);
488
489 cqe = ehea_poll_rq1(qp, &wqe_index);
490 return cqe;
491 }
492
493 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
494 {
495 struct sk_buff *skb;
496 struct ehea_cq *send_cq = pr->send_cq;
497 struct ehea_cqe *cqe;
498 int quota = my_quota;
499 int cqe_counter = 0;
500 int swqe_av = 0;
501 int index;
502 unsigned long flags;
503
504 cqe = ehea_poll_cq(send_cq);
505 while(cqe && (quota > 0)) {
506 ehea_inc_cq(send_cq);
507
508 cqe_counter++;
509 rmb();
510 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
511 ehea_error("Send Completion Error: Resetting port");
512 if (netif_msg_tx_err(pr->port))
513 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
514 queue_work(pr->port->adapter->ehea_wq,
515 &pr->port->reset_task);
516 break;
517 }
518
519 if (netif_msg_tx_done(pr->port))
520 ehea_dump(cqe, sizeof(*cqe), "CQE");
521
522 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
523 == EHEA_SWQE2_TYPE)) {
524
525 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
526 skb = pr->sq_skba.arr[index];
527 dev_kfree_skb(skb);
528 pr->sq_skba.arr[index] = NULL;
529 }
530
531 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
532 quota--;
533
534 cqe = ehea_poll_cq(send_cq);
535 };
536
537 ehea_update_feca(send_cq, cqe_counter);
538 atomic_add(swqe_av, &pr->swqe_avail);
539
540 spin_lock_irqsave(&pr->netif_queue, flags);
541
542 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
543 >= pr->swqe_refill_th)) {
544 netif_wake_queue(pr->port->netdev);
545 pr->queue_stopped = 0;
546 }
547 spin_unlock_irqrestore(&pr->netif_queue, flags);
548
549 return cqe;
550 }
551
552 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
553
554 static int ehea_poll(struct net_device *dev, int *budget)
555 {
556 struct ehea_port_res *pr = dev->priv;
557 struct ehea_cqe *cqe;
558 struct ehea_cqe *cqe_skb = NULL;
559 int force_irq, wqe_index;
560
561 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
562 cqe_skb = ehea_poll_cq(pr->send_cq);
563
564 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
565
566 if ((!cqe && !cqe_skb) || force_irq) {
567 pr->poll_counter = 0;
568 netif_rx_complete(dev);
569 ehea_reset_cq_ep(pr->recv_cq);
570 ehea_reset_cq_ep(pr->send_cq);
571 ehea_reset_cq_n1(pr->recv_cq);
572 ehea_reset_cq_n1(pr->send_cq);
573 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
574 cqe_skb = ehea_poll_cq(pr->send_cq);
575
576 if (!cqe && !cqe_skb)
577 return 0;
578
579 if (!netif_rx_reschedule(dev, dev->quota))
580 return 0;
581 }
582
583 cqe = ehea_proc_rwqes(dev, pr, budget);
584 cqe_skb = ehea_proc_cqes(pr, 300);
585
586 if (cqe || cqe_skb)
587 pr->poll_counter++;
588
589 return 1;
590 }
591
592 #ifdef CONFIG_NET_POLL_CONTROLLER
593 static void ehea_netpoll(struct net_device *dev)
594 {
595 struct ehea_port *port = netdev_priv(dev);
596
597 netif_rx_schedule(port->port_res[0].d_netdev);
598 }
599 #endif
600
601 static int ehea_poll_firstqueue(struct net_device *dev, int *budget)
602 {
603 struct ehea_port *port = netdev_priv(dev);
604 struct net_device *d_dev = port->port_res[0].d_netdev;
605
606 return ehea_poll(d_dev, budget);
607 }
608
609 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
610 {
611 struct ehea_port_res *pr = param;
612
613 netif_rx_schedule(pr->d_netdev);
614
615 return IRQ_HANDLED;
616 }
617
618 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
619 {
620 struct ehea_port *port = param;
621 struct ehea_eqe *eqe;
622 struct ehea_qp *qp;
623 u32 qp_token;
624
625 eqe = ehea_poll_eq(port->qp_eq);
626
627 while (eqe) {
628 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
629 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
630 eqe->entry, qp_token);
631
632 qp = port->port_res[qp_token].qp;
633 ehea_error_data(port->adapter, qp->fw_handle);
634 eqe = ehea_poll_eq(port->qp_eq);
635 }
636
637 queue_work(port->adapter->ehea_wq, &port->reset_task);
638
639 return IRQ_HANDLED;
640 }
641
642 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
643 int logical_port)
644 {
645 int i;
646
647 for (i = 0; i < EHEA_MAX_PORTS; i++)
648 if (adapter->port[i])
649 if (adapter->port[i]->logical_port_id == logical_port)
650 return adapter->port[i];
651 return NULL;
652 }
653
654 int ehea_sense_port_attr(struct ehea_port *port)
655 {
656 int ret;
657 u64 hret;
658 struct hcp_ehea_port_cb0 *cb0;
659
660 cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC); /* May be called via */
661 if (!cb0) { /* ehea_neq_tasklet() */
662 ehea_error("no mem for cb0");
663 ret = -ENOMEM;
664 goto out;
665 }
666
667 hret = ehea_h_query_ehea_port(port->adapter->handle,
668 port->logical_port_id, H_PORT_CB0,
669 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
670 cb0);
671 if (hret != H_SUCCESS) {
672 ret = -EIO;
673 goto out_free;
674 }
675
676 /* MAC address */
677 port->mac_addr = cb0->port_mac_addr << 16;
678
679 if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
680 ret = -EADDRNOTAVAIL;
681 goto out_free;
682 }
683
684 /* Port speed */
685 switch (cb0->port_speed) {
686 case H_SPEED_10M_H:
687 port->port_speed = EHEA_SPEED_10M;
688 port->full_duplex = 0;
689 break;
690 case H_SPEED_10M_F:
691 port->port_speed = EHEA_SPEED_10M;
692 port->full_duplex = 1;
693 break;
694 case H_SPEED_100M_H:
695 port->port_speed = EHEA_SPEED_100M;
696 port->full_duplex = 0;
697 break;
698 case H_SPEED_100M_F:
699 port->port_speed = EHEA_SPEED_100M;
700 port->full_duplex = 1;
701 break;
702 case H_SPEED_1G_F:
703 port->port_speed = EHEA_SPEED_1G;
704 port->full_duplex = 1;
705 break;
706 case H_SPEED_10G_F:
707 port->port_speed = EHEA_SPEED_10G;
708 port->full_duplex = 1;
709 break;
710 default:
711 port->port_speed = 0;
712 port->full_duplex = 0;
713 break;
714 }
715
716 port->autoneg = 1;
717 port->num_mcs = cb0->num_default_qps;
718
719 /* Number of default QPs */
720 if (use_mcs)
721 port->num_def_qps = cb0->num_default_qps;
722 else
723 port->num_def_qps = 1;
724
725 if (!port->num_def_qps) {
726 ret = -EINVAL;
727 goto out_free;
728 }
729
730 port->num_tx_qps = num_tx_qps;
731
732 if (port->num_def_qps >= port->num_tx_qps)
733 port->num_add_tx_qps = 0;
734 else
735 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
736
737 ret = 0;
738 out_free:
739 if (ret || netif_msg_probe(port))
740 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
741 kfree(cb0);
742 out:
743 return ret;
744 }
745
746 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
747 {
748 struct hcp_ehea_port_cb4 *cb4;
749 u64 hret;
750 int ret = 0;
751
752 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
753 if (!cb4) {
754 ehea_error("no mem for cb4");
755 ret = -ENOMEM;
756 goto out;
757 }
758
759 cb4->port_speed = port_speed;
760
761 netif_carrier_off(port->netdev);
762
763 hret = ehea_h_modify_ehea_port(port->adapter->handle,
764 port->logical_port_id,
765 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
766 if (hret == H_SUCCESS) {
767 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
768
769 hret = ehea_h_query_ehea_port(port->adapter->handle,
770 port->logical_port_id,
771 H_PORT_CB4, H_PORT_CB4_SPEED,
772 cb4);
773 if (hret == H_SUCCESS) {
774 switch (cb4->port_speed) {
775 case H_SPEED_10M_H:
776 port->port_speed = EHEA_SPEED_10M;
777 port->full_duplex = 0;
778 break;
779 case H_SPEED_10M_F:
780 port->port_speed = EHEA_SPEED_10M;
781 port->full_duplex = 1;
782 break;
783 case H_SPEED_100M_H:
784 port->port_speed = EHEA_SPEED_100M;
785 port->full_duplex = 0;
786 break;
787 case H_SPEED_100M_F:
788 port->port_speed = EHEA_SPEED_100M;
789 port->full_duplex = 1;
790 break;
791 case H_SPEED_1G_F:
792 port->port_speed = EHEA_SPEED_1G;
793 port->full_duplex = 1;
794 break;
795 case H_SPEED_10G_F:
796 port->port_speed = EHEA_SPEED_10G;
797 port->full_duplex = 1;
798 break;
799 default:
800 port->port_speed = 0;
801 port->full_duplex = 0;
802 break;
803 }
804 } else {
805 ehea_error("Failed sensing port speed");
806 ret = -EIO;
807 }
808 } else {
809 if (hret == H_AUTHORITY) {
810 ehea_info("Hypervisor denied setting port speed");
811 ret = -EPERM;
812 } else {
813 ret = -EIO;
814 ehea_error("Failed setting port speed");
815 }
816 }
817 netif_carrier_on(port->netdev);
818 kfree(cb4);
819 out:
820 return ret;
821 }
822
823 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
824 {
825 int ret;
826 u8 ec;
827 u8 portnum;
828 struct ehea_port *port;
829
830 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
831 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
832 port = ehea_get_port(adapter, portnum);
833
834 switch (ec) {
835 case EHEA_EC_PORTSTATE_CHG: /* port state change */
836
837 if (!port) {
838 ehea_error("unknown portnum %x", portnum);
839 break;
840 }
841
842 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
843 if (!netif_carrier_ok(port->netdev)) {
844 ret = ehea_sense_port_attr(port);
845 if (ret) {
846 ehea_error("failed resensing port "
847 "attributes");
848 break;
849 }
850
851 if (netif_msg_link(port))
852 ehea_info("%s: Logical port up: %dMbps "
853 "%s Duplex",
854 port->netdev->name,
855 port->port_speed,
856 port->full_duplex ==
857 1 ? "Full" : "Half");
858
859 netif_carrier_on(port->netdev);
860 netif_wake_queue(port->netdev);
861 }
862 } else
863 if (netif_carrier_ok(port->netdev)) {
864 if (netif_msg_link(port))
865 ehea_info("%s: Logical port down",
866 port->netdev->name);
867 netif_carrier_off(port->netdev);
868 netif_stop_queue(port->netdev);
869 }
870
871 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
872 if (netif_msg_link(port))
873 ehea_info("%s: Physical port up",
874 port->netdev->name);
875 } else {
876 if (netif_msg_link(port))
877 ehea_info("%s: Physical port down",
878 port->netdev->name);
879 }
880
881 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
882 ehea_info("External switch port is primary port");
883 else
884 ehea_info("External switch port is backup port");
885
886 break;
887 case EHEA_EC_ADAPTER_MALFUNC:
888 ehea_error("Adapter malfunction");
889 break;
890 case EHEA_EC_PORT_MALFUNC:
891 ehea_info("Port malfunction: Device: %s", port->netdev->name);
892 netif_carrier_off(port->netdev);
893 netif_stop_queue(port->netdev);
894 break;
895 default:
896 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
897 break;
898 }
899 }
900
901 static void ehea_neq_tasklet(unsigned long data)
902 {
903 struct ehea_adapter *adapter = (struct ehea_adapter*)data;
904 struct ehea_eqe *eqe;
905 u64 event_mask;
906
907 eqe = ehea_poll_eq(adapter->neq);
908 ehea_debug("eqe=%p", eqe);
909
910 while (eqe) {
911 ehea_debug("*eqe=%lx", eqe->entry);
912 ehea_parse_eqe(adapter, eqe->entry);
913 eqe = ehea_poll_eq(adapter->neq);
914 ehea_debug("next eqe=%p", eqe);
915 }
916
917 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
918 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
919 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
920
921 ehea_h_reset_events(adapter->handle,
922 adapter->neq->fw_handle, event_mask);
923 }
924
925 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
926 {
927 struct ehea_adapter *adapter = param;
928 tasklet_hi_schedule(&adapter->neq_tasklet);
929 return IRQ_HANDLED;
930 }
931
932
933 static int ehea_fill_port_res(struct ehea_port_res *pr)
934 {
935 int ret;
936 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
937
938 ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
939 - init_attr->act_nr_rwqes_rq2
940 - init_attr->act_nr_rwqes_rq3 - 1);
941
942 ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
943
944 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
945
946 return ret;
947 }
948
949 static int ehea_reg_interrupts(struct net_device *dev)
950 {
951 struct ehea_port *port = netdev_priv(dev);
952 struct ehea_port_res *pr;
953 int i, ret;
954
955
956 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
957 dev->name);
958
959 ret = ibmebus_request_irq(NULL, port->qp_eq->attr.ist1,
960 ehea_qp_aff_irq_handler,
961 IRQF_DISABLED, port->int_aff_name, port);
962 if (ret) {
963 ehea_error("failed registering irq for qp_aff_irq_handler:"
964 "ist=%X", port->qp_eq->attr.ist1);
965 goto out_free_qpeq;
966 }
967
968 if (netif_msg_ifup(port))
969 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
970 "registered", port->qp_eq->attr.ist1);
971
972
973 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
974 pr = &port->port_res[i];
975 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
976 "%s-queue%d", dev->name, i);
977 ret = ibmebus_request_irq(NULL, pr->eq->attr.ist1,
978 ehea_recv_irq_handler,
979 IRQF_DISABLED, pr->int_send_name,
980 pr);
981 if (ret) {
982 ehea_error("failed registering irq for ehea_queue "
983 "port_res_nr:%d, ist=%X", i,
984 pr->eq->attr.ist1);
985 goto out_free_req;
986 }
987 if (netif_msg_ifup(port))
988 ehea_info("irq_handle 0x%X for function ehea_queue_int "
989 "%d registered", pr->eq->attr.ist1, i);
990 }
991 out:
992 return ret;
993
994
995 out_free_req:
996 while (--i >= 0) {
997 u32 ist = port->port_res[i].eq->attr.ist1;
998 ibmebus_free_irq(NULL, ist, &port->port_res[i]);
999 }
1000
1001 out_free_qpeq:
1002 ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
1003 i = port->num_def_qps;
1004
1005 goto out;
1006
1007 }
1008
1009 static void ehea_free_interrupts(struct net_device *dev)
1010 {
1011 struct ehea_port *port = netdev_priv(dev);
1012 struct ehea_port_res *pr;
1013 int i;
1014
1015 /* send */
1016
1017 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1018 pr = &port->port_res[i];
1019 ibmebus_free_irq(NULL, pr->eq->attr.ist1, pr);
1020 if (netif_msg_intr(port))
1021 ehea_info("free send irq for res %d with handle 0x%X",
1022 i, pr->eq->attr.ist1);
1023 }
1024
1025 /* associated events */
1026 ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
1027 if (netif_msg_intr(port))
1028 ehea_info("associated event interrupt for handle 0x%X freed",
1029 port->qp_eq->attr.ist1);
1030 }
1031
1032 static int ehea_configure_port(struct ehea_port *port)
1033 {
1034 int ret, i;
1035 u64 hret, mask;
1036 struct hcp_ehea_port_cb0 *cb0;
1037
1038 ret = -ENOMEM;
1039 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1040 if (!cb0)
1041 goto out;
1042
1043 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1044 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1045 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1046 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1047 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1048 PXLY_RC_VLAN_FILTER)
1049 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1050
1051 for (i = 0; i < port->num_mcs; i++)
1052 if (use_mcs)
1053 cb0->default_qpn_arr[i] =
1054 port->port_res[i].qp->init_attr.qp_nr;
1055 else
1056 cb0->default_qpn_arr[i] =
1057 port->port_res[0].qp->init_attr.qp_nr;
1058
1059 if (netif_msg_ifup(port))
1060 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1061
1062 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1063 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1064
1065 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1066 port->logical_port_id,
1067 H_PORT_CB0, mask, cb0);
1068 ret = -EIO;
1069 if (hret != H_SUCCESS)
1070 goto out_free;
1071
1072 ret = 0;
1073
1074 out_free:
1075 kfree(cb0);
1076 out:
1077 return ret;
1078 }
1079
1080 int ehea_gen_smrs(struct ehea_port_res *pr)
1081 {
1082 int ret;
1083 struct ehea_adapter *adapter = pr->port->adapter;
1084
1085 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1086 if (ret)
1087 goto out;
1088
1089 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1090 if (ret)
1091 goto out_free;
1092
1093 return 0;
1094
1095 out_free:
1096 ehea_rem_mr(&pr->send_mr);
1097 out:
1098 ehea_error("Generating SMRS failed\n");
1099 return -EIO;
1100 }
1101
1102 int ehea_rem_smrs(struct ehea_port_res *pr)
1103 {
1104 if ((ehea_rem_mr(&pr->send_mr))
1105 || (ehea_rem_mr(&pr->recv_mr)))
1106 return -EIO;
1107 else
1108 return 0;
1109 }
1110
1111 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1112 {
1113 int arr_size = sizeof(void*) * max_q_entries;
1114
1115 q_skba->arr = vmalloc(arr_size);
1116 if (!q_skba->arr)
1117 return -ENOMEM;
1118
1119 memset(q_skba->arr, 0, arr_size);
1120
1121 q_skba->len = max_q_entries;
1122 q_skba->index = 0;
1123 q_skba->os_skbs = 0;
1124
1125 return 0;
1126 }
1127
1128 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1129 struct port_res_cfg *pr_cfg, int queue_token)
1130 {
1131 struct ehea_adapter *adapter = port->adapter;
1132 enum ehea_eq_type eq_type = EHEA_EQ;
1133 struct ehea_qp_init_attr *init_attr = NULL;
1134 int ret = -EIO;
1135
1136 memset(pr, 0, sizeof(struct ehea_port_res));
1137
1138 pr->port = port;
1139 spin_lock_init(&pr->xmit_lock);
1140 spin_lock_init(&pr->netif_queue);
1141
1142 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1143 if (!pr->eq) {
1144 ehea_error("create_eq failed (eq)");
1145 goto out_free;
1146 }
1147
1148 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1149 pr->eq->fw_handle,
1150 port->logical_port_id);
1151 if (!pr->recv_cq) {
1152 ehea_error("create_cq failed (cq_recv)");
1153 goto out_free;
1154 }
1155
1156 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1157 pr->eq->fw_handle,
1158 port->logical_port_id);
1159 if (!pr->send_cq) {
1160 ehea_error("create_cq failed (cq_send)");
1161 goto out_free;
1162 }
1163
1164 if (netif_msg_ifup(port))
1165 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1166 pr->send_cq->attr.act_nr_of_cqes,
1167 pr->recv_cq->attr.act_nr_of_cqes);
1168
1169 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1170 if (!init_attr) {
1171 ret = -ENOMEM;
1172 ehea_error("no mem for ehea_qp_init_attr");
1173 goto out_free;
1174 }
1175
1176 init_attr->low_lat_rq1 = 1;
1177 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1178 init_attr->rq_count = 3;
1179 init_attr->qp_token = queue_token;
1180 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1181 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1182 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1183 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1184 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1185 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1186 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1187 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1188 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1189 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1190 init_attr->port_nr = port->logical_port_id;
1191 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1192 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1193 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1194
1195 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1196 if (!pr->qp) {
1197 ehea_error("create_qp failed");
1198 ret = -EIO;
1199 goto out_free;
1200 }
1201
1202 if (netif_msg_ifup(port))
1203 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1204 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1205 init_attr->act_nr_send_wqes,
1206 init_attr->act_nr_rwqes_rq1,
1207 init_attr->act_nr_rwqes_rq2,
1208 init_attr->act_nr_rwqes_rq3);
1209
1210 ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1211 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1212 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1213 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1214 if (ret)
1215 goto out_free;
1216
1217 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1218 if (ehea_gen_smrs(pr) != 0) {
1219 ret = -EIO;
1220 goto out_free;
1221 }
1222
1223 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1224
1225 kfree(init_attr);
1226
1227 pr->d_netdev = alloc_netdev(0, "", ether_setup);
1228 if (!pr->d_netdev)
1229 goto out_free;
1230 pr->d_netdev->priv = pr;
1231 pr->d_netdev->weight = 64;
1232 pr->d_netdev->poll = ehea_poll;
1233 set_bit(__LINK_STATE_START, &pr->d_netdev->state);
1234 strcpy(pr->d_netdev->name, port->netdev->name);
1235
1236 ret = 0;
1237 goto out;
1238
1239 out_free:
1240 kfree(init_attr);
1241 vfree(pr->sq_skba.arr);
1242 vfree(pr->rq1_skba.arr);
1243 vfree(pr->rq2_skba.arr);
1244 vfree(pr->rq3_skba.arr);
1245 ehea_destroy_qp(pr->qp);
1246 ehea_destroy_cq(pr->send_cq);
1247 ehea_destroy_cq(pr->recv_cq);
1248 ehea_destroy_eq(pr->eq);
1249 out:
1250 return ret;
1251 }
1252
1253 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1254 {
1255 int ret, i;
1256
1257 free_netdev(pr->d_netdev);
1258
1259 ret = ehea_destroy_qp(pr->qp);
1260
1261 if (!ret) {
1262 ehea_destroy_cq(pr->send_cq);
1263 ehea_destroy_cq(pr->recv_cq);
1264 ehea_destroy_eq(pr->eq);
1265
1266 for (i = 0; i < pr->rq1_skba.len; i++)
1267 if (pr->rq1_skba.arr[i])
1268 dev_kfree_skb(pr->rq1_skba.arr[i]);
1269
1270 for (i = 0; i < pr->rq2_skba.len; i++)
1271 if (pr->rq2_skba.arr[i])
1272 dev_kfree_skb(pr->rq2_skba.arr[i]);
1273
1274 for (i = 0; i < pr->rq3_skba.len; i++)
1275 if (pr->rq3_skba.arr[i])
1276 dev_kfree_skb(pr->rq3_skba.arr[i]);
1277
1278 for (i = 0; i < pr->sq_skba.len; i++)
1279 if (pr->sq_skba.arr[i])
1280 dev_kfree_skb(pr->sq_skba.arr[i]);
1281
1282 vfree(pr->rq1_skba.arr);
1283 vfree(pr->rq2_skba.arr);
1284 vfree(pr->rq3_skba.arr);
1285 vfree(pr->sq_skba.arr);
1286 ret = ehea_rem_smrs(pr);
1287 }
1288 return ret;
1289 }
1290
1291 /*
1292 * The write_* functions store information in swqe which is used by
1293 * the hardware to calculate the ip/tcp/udp checksum
1294 */
1295
1296 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1297 const struct sk_buff *skb)
1298 {
1299 swqe->ip_start = skb_network_offset(skb);
1300 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1301 }
1302
1303 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1304 const struct sk_buff *skb)
1305 {
1306 swqe->tcp_offset =
1307 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1308
1309 swqe->tcp_end = (u16)skb->len - 1;
1310 }
1311
1312 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1313 const struct sk_buff *skb)
1314 {
1315 swqe->tcp_offset =
1316 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1317
1318 swqe->tcp_end = (u16)skb->len - 1;
1319 }
1320
1321
1322 static void write_swqe2_TSO(struct sk_buff *skb,
1323 struct ehea_swqe *swqe, u32 lkey)
1324 {
1325 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1326 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1327 int skb_data_size = skb->len - skb->data_len;
1328 int headersize;
1329 u64 tmp_addr;
1330
1331 /* Packet is TCP with TSO enabled */
1332 swqe->tx_control |= EHEA_SWQE_TSO;
1333 swqe->mss = skb_shinfo(skb)->gso_size;
1334 /* copy only eth/ip/tcp headers to immediate data and
1335 * the rest of skb->data to sg1entry
1336 */
1337 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1338
1339 skb_data_size = skb->len - skb->data_len;
1340
1341 if (skb_data_size >= headersize) {
1342 /* copy immediate data */
1343 skb_copy_from_linear_data(skb, imm_data, headersize);
1344 swqe->immediate_data_length = headersize;
1345
1346 if (skb_data_size > headersize) {
1347 /* set sg1entry data */
1348 sg1entry->l_key = lkey;
1349 sg1entry->len = skb_data_size - headersize;
1350
1351 tmp_addr = (u64)(skb->data + headersize);
1352 sg1entry->vaddr = ehea_map_vaddr(tmp_addr);
1353 swqe->descriptors++;
1354 }
1355 } else
1356 ehea_error("cannot handle fragmented headers");
1357 }
1358
1359 static void write_swqe2_nonTSO(struct sk_buff *skb,
1360 struct ehea_swqe *swqe, u32 lkey)
1361 {
1362 int skb_data_size = skb->len - skb->data_len;
1363 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1364 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1365 u64 tmp_addr;
1366
1367 /* Packet is any nonTSO type
1368 *
1369 * Copy as much as possible skb->data to immediate data and
1370 * the rest to sg1entry
1371 */
1372 if (skb_data_size >= SWQE2_MAX_IMM) {
1373 /* copy immediate data */
1374 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1375
1376 swqe->immediate_data_length = SWQE2_MAX_IMM;
1377
1378 if (skb_data_size > SWQE2_MAX_IMM) {
1379 /* copy sg1entry data */
1380 sg1entry->l_key = lkey;
1381 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1382 tmp_addr = (u64)(skb->data + SWQE2_MAX_IMM);
1383 sg1entry->vaddr = ehea_map_vaddr(tmp_addr);
1384 swqe->descriptors++;
1385 }
1386 } else {
1387 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1388 swqe->immediate_data_length = skb_data_size;
1389 }
1390 }
1391
1392 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1393 struct ehea_swqe *swqe, u32 lkey)
1394 {
1395 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1396 skb_frag_t *frag;
1397 int nfrags, sg1entry_contains_frag_data, i;
1398 u64 tmp_addr;
1399
1400 nfrags = skb_shinfo(skb)->nr_frags;
1401 sg1entry = &swqe->u.immdata_desc.sg_entry;
1402 sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1403 swqe->descriptors = 0;
1404 sg1entry_contains_frag_data = 0;
1405
1406 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1407 write_swqe2_TSO(skb, swqe, lkey);
1408 else
1409 write_swqe2_nonTSO(skb, swqe, lkey);
1410
1411 /* write descriptors */
1412 if (nfrags > 0) {
1413 if (swqe->descriptors == 0) {
1414 /* sg1entry not yet used */
1415 frag = &skb_shinfo(skb)->frags[0];
1416
1417 /* copy sg1entry data */
1418 sg1entry->l_key = lkey;
1419 sg1entry->len = frag->size;
1420 tmp_addr = (u64)(page_address(frag->page)
1421 + frag->page_offset);
1422 sg1entry->vaddr = ehea_map_vaddr(tmp_addr);
1423 swqe->descriptors++;
1424 sg1entry_contains_frag_data = 1;
1425 }
1426
1427 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1428
1429 frag = &skb_shinfo(skb)->frags[i];
1430 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1431
1432 sgentry->l_key = lkey;
1433 sgentry->len = frag->size;
1434
1435 tmp_addr = (u64)(page_address(frag->page)
1436 + frag->page_offset);
1437 sgentry->vaddr = ehea_map_vaddr(tmp_addr);
1438 swqe->descriptors++;
1439 }
1440 }
1441 }
1442
1443 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1444 {
1445 int ret = 0;
1446 u64 hret;
1447 u8 reg_type;
1448
1449 /* De/Register untagged packets */
1450 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1451 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1452 port->logical_port_id,
1453 reg_type, port->mac_addr, 0, hcallid);
1454 if (hret != H_SUCCESS) {
1455 ehea_error("%sregistering bc address failed (tagged)",
1456 hcallid == H_REG_BCMC ? "" : "de");
1457 ret = -EIO;
1458 goto out_herr;
1459 }
1460
1461 /* De/Register VLAN packets */
1462 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1463 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1464 port->logical_port_id,
1465 reg_type, port->mac_addr, 0, hcallid);
1466 if (hret != H_SUCCESS) {
1467 ehea_error("%sregistering bc address failed (vlan)",
1468 hcallid == H_REG_BCMC ? "" : "de");
1469 ret = -EIO;
1470 }
1471 out_herr:
1472 return ret;
1473 }
1474
1475 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1476 {
1477 struct ehea_port *port = netdev_priv(dev);
1478 struct sockaddr *mac_addr = sa;
1479 struct hcp_ehea_port_cb0 *cb0;
1480 int ret;
1481 u64 hret;
1482
1483 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1484 ret = -EADDRNOTAVAIL;
1485 goto out;
1486 }
1487
1488 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1489 if (!cb0) {
1490 ehea_error("no mem for cb0");
1491 ret = -ENOMEM;
1492 goto out;
1493 }
1494
1495 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1496
1497 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1498
1499 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1500 port->logical_port_id, H_PORT_CB0,
1501 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1502 if (hret != H_SUCCESS) {
1503 ret = -EIO;
1504 goto out_free;
1505 }
1506
1507 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1508
1509 /* Deregister old MAC in pHYP */
1510 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1511 if (ret)
1512 goto out_free;
1513
1514 port->mac_addr = cb0->port_mac_addr << 16;
1515
1516 /* Register new MAC in pHYP */
1517 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1518 if (ret)
1519 goto out_free;
1520
1521 ret = 0;
1522 out_free:
1523 kfree(cb0);
1524 out:
1525 return ret;
1526 }
1527
1528 static void ehea_promiscuous_error(u64 hret, int enable)
1529 {
1530 if (hret == H_AUTHORITY)
1531 ehea_info("Hypervisor denied %sabling promiscuous mode",
1532 enable == 1 ? "en" : "dis");
1533 else
1534 ehea_error("failed %sabling promiscuous mode",
1535 enable == 1 ? "en" : "dis");
1536 }
1537
1538 static void ehea_promiscuous(struct net_device *dev, int enable)
1539 {
1540 struct ehea_port *port = netdev_priv(dev);
1541 struct hcp_ehea_port_cb7 *cb7;
1542 u64 hret;
1543
1544 if ((enable && port->promisc) || (!enable && !port->promisc))
1545 return;
1546
1547 cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1548 if (!cb7) {
1549 ehea_error("no mem for cb7");
1550 goto out;
1551 }
1552
1553 /* Modify Pxs_DUCQPN in CB7 */
1554 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1555
1556 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1557 port->logical_port_id,
1558 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1559 if (hret) {
1560 ehea_promiscuous_error(hret, enable);
1561 goto out;
1562 }
1563
1564 port->promisc = enable;
1565 out:
1566 kfree(cb7);
1567 return;
1568 }
1569
1570 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1571 u32 hcallid)
1572 {
1573 u64 hret;
1574 u8 reg_type;
1575
1576 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1577 | EHEA_BCMC_UNTAGGED;
1578
1579 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1580 port->logical_port_id,
1581 reg_type, mc_mac_addr, 0, hcallid);
1582 if (hret)
1583 goto out;
1584
1585 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1586 | EHEA_BCMC_VLANID_ALL;
1587
1588 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1589 port->logical_port_id,
1590 reg_type, mc_mac_addr, 0, hcallid);
1591 out:
1592 return hret;
1593 }
1594
1595 static int ehea_drop_multicast_list(struct net_device *dev)
1596 {
1597 struct ehea_port *port = netdev_priv(dev);
1598 struct ehea_mc_list *mc_entry = port->mc_list;
1599 struct list_head *pos;
1600 struct list_head *temp;
1601 int ret = 0;
1602 u64 hret;
1603
1604 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1605 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1606
1607 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1608 H_DEREG_BCMC);
1609 if (hret) {
1610 ehea_error("failed deregistering mcast MAC");
1611 ret = -EIO;
1612 }
1613
1614 list_del(pos);
1615 kfree(mc_entry);
1616 }
1617 return ret;
1618 }
1619
1620 static void ehea_allmulti(struct net_device *dev, int enable)
1621 {
1622 struct ehea_port *port = netdev_priv(dev);
1623 u64 hret;
1624
1625 if (!port->allmulti) {
1626 if (enable) {
1627 /* Enable ALLMULTI */
1628 ehea_drop_multicast_list(dev);
1629 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1630 if (!hret)
1631 port->allmulti = 1;
1632 else
1633 ehea_error("failed enabling IFF_ALLMULTI");
1634 }
1635 } else
1636 if (!enable) {
1637 /* Disable ALLMULTI */
1638 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1639 if (!hret)
1640 port->allmulti = 0;
1641 else
1642 ehea_error("failed disabling IFF_ALLMULTI");
1643 }
1644 }
1645
1646 static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
1647 {
1648 struct ehea_mc_list *ehea_mcl_entry;
1649 u64 hret;
1650
1651 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1652 if (!ehea_mcl_entry) {
1653 ehea_error("no mem for mcl_entry");
1654 return;
1655 }
1656
1657 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1658
1659 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1660
1661 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1662 H_REG_BCMC);
1663 if (!hret)
1664 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1665 else {
1666 ehea_error("failed registering mcast MAC");
1667 kfree(ehea_mcl_entry);
1668 }
1669 }
1670
1671 static void ehea_set_multicast_list(struct net_device *dev)
1672 {
1673 struct ehea_port *port = netdev_priv(dev);
1674 struct dev_mc_list *k_mcl_entry;
1675 int ret, i;
1676
1677 if (dev->flags & IFF_PROMISC) {
1678 ehea_promiscuous(dev, 1);
1679 return;
1680 }
1681 ehea_promiscuous(dev, 0);
1682
1683 if (dev->flags & IFF_ALLMULTI) {
1684 ehea_allmulti(dev, 1);
1685 return;
1686 }
1687 ehea_allmulti(dev, 0);
1688
1689 if (dev->mc_count) {
1690 ret = ehea_drop_multicast_list(dev);
1691 if (ret) {
1692 /* Dropping the current multicast list failed.
1693 * Enabling ALL_MULTI is the best we can do.
1694 */
1695 ehea_allmulti(dev, 1);
1696 }
1697
1698 if (dev->mc_count > port->adapter->max_mc_mac) {
1699 ehea_info("Mcast registration limit reached (0x%lx). "
1700 "Use ALLMULTI!",
1701 port->adapter->max_mc_mac);
1702 goto out;
1703 }
1704
1705 for (i = 0, k_mcl_entry = dev->mc_list;
1706 i < dev->mc_count;
1707 i++, k_mcl_entry = k_mcl_entry->next) {
1708 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1709 }
1710 }
1711 out:
1712 return;
1713 }
1714
1715 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1716 {
1717 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1718 return -EINVAL;
1719 dev->mtu = new_mtu;
1720 return 0;
1721 }
1722
1723 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1724 struct ehea_swqe *swqe, u32 lkey)
1725 {
1726 if (skb->protocol == htons(ETH_P_IP)) {
1727 const struct iphdr *iph = ip_hdr(skb);
1728
1729 /* IPv4 */
1730 swqe->tx_control |= EHEA_SWQE_CRC
1731 | EHEA_SWQE_IP_CHECKSUM
1732 | EHEA_SWQE_TCP_CHECKSUM
1733 | EHEA_SWQE_IMM_DATA_PRESENT
1734 | EHEA_SWQE_DESCRIPTORS_PRESENT;
1735
1736 write_ip_start_end(swqe, skb);
1737
1738 if (iph->protocol == IPPROTO_UDP) {
1739 if ((iph->frag_off & IP_MF)
1740 || (iph->frag_off & IP_OFFSET))
1741 /* IP fragment, so don't change cs */
1742 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
1743 else
1744 write_udp_offset_end(swqe, skb);
1745 } else if (iph->protocol == IPPROTO_TCP) {
1746 write_tcp_offset_end(swqe, skb);
1747 }
1748
1749 /* icmp (big data) and ip segmentation packets (all other ip
1750 packets) do not require any special handling */
1751
1752 } else {
1753 /* Other Ethernet Protocol */
1754 swqe->tx_control |= EHEA_SWQE_CRC
1755 | EHEA_SWQE_IMM_DATA_PRESENT
1756 | EHEA_SWQE_DESCRIPTORS_PRESENT;
1757 }
1758
1759 write_swqe2_data(skb, dev, swqe, lkey);
1760 }
1761
1762 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1763 struct ehea_swqe *swqe)
1764 {
1765 int nfrags = skb_shinfo(skb)->nr_frags;
1766 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1767 skb_frag_t *frag;
1768 int i;
1769
1770 if (skb->protocol == htons(ETH_P_IP)) {
1771 const struct iphdr *iph = ip_hdr(skb);
1772
1773 /* IPv4 */
1774 write_ip_start_end(swqe, skb);
1775
1776 if (iph->protocol == IPPROTO_TCP) {
1777 swqe->tx_control |= EHEA_SWQE_CRC
1778 | EHEA_SWQE_IP_CHECKSUM
1779 | EHEA_SWQE_TCP_CHECKSUM
1780 | EHEA_SWQE_IMM_DATA_PRESENT;
1781
1782 write_tcp_offset_end(swqe, skb);
1783
1784 } else if (iph->protocol == IPPROTO_UDP) {
1785 if ((iph->frag_off & IP_MF)
1786 || (iph->frag_off & IP_OFFSET))
1787 /* IP fragment, so don't change cs */
1788 swqe->tx_control |= EHEA_SWQE_CRC
1789 | EHEA_SWQE_IMM_DATA_PRESENT;
1790 else {
1791 swqe->tx_control |= EHEA_SWQE_CRC
1792 | EHEA_SWQE_IP_CHECKSUM
1793 | EHEA_SWQE_TCP_CHECKSUM
1794 | EHEA_SWQE_IMM_DATA_PRESENT;
1795
1796 write_udp_offset_end(swqe, skb);
1797 }
1798 } else {
1799 /* icmp (big data) and
1800 ip segmentation packets (all other ip packets) */
1801 swqe->tx_control |= EHEA_SWQE_CRC
1802 | EHEA_SWQE_IP_CHECKSUM
1803 | EHEA_SWQE_IMM_DATA_PRESENT;
1804 }
1805 } else {
1806 /* Other Ethernet Protocol */
1807 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
1808 }
1809 /* copy (immediate) data */
1810 if (nfrags == 0) {
1811 /* data is in a single piece */
1812 skb_copy_from_linear_data(skb, imm_data, skb->len);
1813 } else {
1814 /* first copy data from the skb->data buffer ... */
1815 skb_copy_from_linear_data(skb, imm_data,
1816 skb->len - skb->data_len);
1817 imm_data += skb->len - skb->data_len;
1818
1819 /* ... then copy data from the fragments */
1820 for (i = 0; i < nfrags; i++) {
1821 frag = &skb_shinfo(skb)->frags[i];
1822 memcpy(imm_data,
1823 page_address(frag->page) + frag->page_offset,
1824 frag->size);
1825 imm_data += frag->size;
1826 }
1827 }
1828 swqe->immediate_data_length = skb->len;
1829 dev_kfree_skb(skb);
1830 }
1831
1832 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
1833 {
1834 struct tcphdr *tcp;
1835 u32 tmp;
1836
1837 if ((skb->protocol == htons(ETH_P_IP)) &&
1838 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
1839 tcp = (struct tcphdr*)(skb_network_header(skb) + (ip_hdr(skb)->ihl * 4));
1840 tmp = (tcp->source + (tcp->dest << 16)) % 31;
1841 tmp += ip_hdr(skb)->daddr % 31;
1842 return tmp % num_qps;
1843 }
1844 else
1845 return 0;
1846 }
1847
1848 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
1849 {
1850 struct ehea_port *port = netdev_priv(dev);
1851 struct ehea_swqe *swqe;
1852 unsigned long flags;
1853 u32 lkey;
1854 int swqe_index;
1855 struct ehea_port_res *pr;
1856
1857 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
1858
1859 if (!spin_trylock(&pr->xmit_lock))
1860 return NETDEV_TX_BUSY;
1861
1862 if (pr->queue_stopped) {
1863 spin_unlock(&pr->xmit_lock);
1864 return NETDEV_TX_BUSY;
1865 }
1866
1867 swqe = ehea_get_swqe(pr->qp, &swqe_index);
1868 memset(swqe, 0, SWQE_HEADER_SIZE);
1869 atomic_dec(&pr->swqe_avail);
1870
1871 if (skb->len <= SWQE3_MAX_IMM) {
1872 u32 sig_iv = port->sig_comp_iv;
1873 u32 swqe_num = pr->swqe_id_counter;
1874 ehea_xmit3(skb, dev, swqe);
1875 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
1876 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
1877 if (pr->swqe_ll_count >= (sig_iv - 1)) {
1878 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1879 sig_iv);
1880 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1881 pr->swqe_ll_count = 0;
1882 } else
1883 pr->swqe_ll_count += 1;
1884 } else {
1885 swqe->wr_id =
1886 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
1887 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
1888 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
1889 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
1890 pr->sq_skba.arr[pr->sq_skba.index] = skb;
1891
1892 pr->sq_skba.index++;
1893 pr->sq_skba.index &= (pr->sq_skba.len - 1);
1894
1895 lkey = pr->send_mr.lkey;
1896 ehea_xmit2(skb, dev, swqe, lkey);
1897 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1898 }
1899 pr->swqe_id_counter += 1;
1900
1901 if (port->vgrp && vlan_tx_tag_present(skb)) {
1902 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
1903 swqe->vlan_tag = vlan_tx_tag_get(skb);
1904 }
1905
1906 if (netif_msg_tx_queued(port)) {
1907 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
1908 ehea_dump(swqe, 512, "swqe");
1909 }
1910
1911 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)))
1912 goto out;
1913
1914 ehea_post_swqe(pr->qp, swqe);
1915 pr->tx_packets++;
1916
1917 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1918 spin_lock_irqsave(&pr->netif_queue, flags);
1919 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1920 pr->p_stats.queue_stopped++;
1921 netif_stop_queue(dev);
1922 pr->queue_stopped = 1;
1923 }
1924 spin_unlock_irqrestore(&pr->netif_queue, flags);
1925 }
1926 dev->trans_start = jiffies;
1927 spin_unlock(&pr->xmit_lock);
1928 out:
1929 return NETDEV_TX_OK;
1930 }
1931
1932 static void ehea_vlan_rx_register(struct net_device *dev,
1933 struct vlan_group *grp)
1934 {
1935 struct ehea_port *port = netdev_priv(dev);
1936 struct ehea_adapter *adapter = port->adapter;
1937 struct hcp_ehea_port_cb1 *cb1;
1938 u64 hret;
1939
1940 port->vgrp = grp;
1941
1942 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1943 if (!cb1) {
1944 ehea_error("no mem for cb1");
1945 goto out;
1946 }
1947
1948 memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
1949
1950 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1951 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1952 if (hret != H_SUCCESS)
1953 ehea_error("modify_ehea_port failed");
1954
1955 kfree(cb1);
1956 out:
1957 return;
1958 }
1959
1960 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
1961 {
1962 struct ehea_port *port = netdev_priv(dev);
1963 struct ehea_adapter *adapter = port->adapter;
1964 struct hcp_ehea_port_cb1 *cb1;
1965 int index;
1966 u64 hret;
1967
1968 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1969 if (!cb1) {
1970 ehea_error("no mem for cb1");
1971 goto out;
1972 }
1973
1974 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
1975 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1976 if (hret != H_SUCCESS) {
1977 ehea_error("query_ehea_port failed");
1978 goto out;
1979 }
1980
1981 index = (vid / 64);
1982 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
1983
1984 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1985 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1986 if (hret != H_SUCCESS)
1987 ehea_error("modify_ehea_port failed");
1988 out:
1989 kfree(cb1);
1990 return;
1991 }
1992
1993 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
1994 {
1995 struct ehea_port *port = netdev_priv(dev);
1996 struct ehea_adapter *adapter = port->adapter;
1997 struct hcp_ehea_port_cb1 *cb1;
1998 int index;
1999 u64 hret;
2000
2001 vlan_group_set_device(port->vgrp, vid, NULL);
2002
2003 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2004 if (!cb1) {
2005 ehea_error("no mem for cb1");
2006 goto out;
2007 }
2008
2009 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2010 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2011 if (hret != H_SUCCESS) {
2012 ehea_error("query_ehea_port failed");
2013 goto out;
2014 }
2015
2016 index = (vid / 64);
2017 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2018
2019 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2020 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2021 if (hret != H_SUCCESS)
2022 ehea_error("modify_ehea_port failed");
2023 out:
2024 kfree(cb1);
2025 return;
2026 }
2027
2028 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2029 {
2030 int ret = -EIO;
2031 u64 hret;
2032 u16 dummy16 = 0;
2033 u64 dummy64 = 0;
2034 struct hcp_modify_qp_cb0* cb0;
2035
2036 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2037 if (!cb0) {
2038 ret = -ENOMEM;
2039 goto out;
2040 }
2041
2042 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2043 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2044 if (hret != H_SUCCESS) {
2045 ehea_error("query_ehea_qp failed (1)");
2046 goto out;
2047 }
2048
2049 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2050 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2051 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2052 &dummy64, &dummy64, &dummy16, &dummy16);
2053 if (hret != H_SUCCESS) {
2054 ehea_error("modify_ehea_qp failed (1)");
2055 goto out;
2056 }
2057
2058 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2059 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2060 if (hret != H_SUCCESS) {
2061 ehea_error("query_ehea_qp failed (2)");
2062 goto out;
2063 }
2064
2065 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2066 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2067 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2068 &dummy64, &dummy64, &dummy16, &dummy16);
2069 if (hret != H_SUCCESS) {
2070 ehea_error("modify_ehea_qp failed (2)");
2071 goto out;
2072 }
2073
2074 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2075 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2076 if (hret != H_SUCCESS) {
2077 ehea_error("query_ehea_qp failed (3)");
2078 goto out;
2079 }
2080
2081 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2082 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2083 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2084 &dummy64, &dummy64, &dummy16, &dummy16);
2085 if (hret != H_SUCCESS) {
2086 ehea_error("modify_ehea_qp failed (3)");
2087 goto out;
2088 }
2089
2090 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2091 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2092 if (hret != H_SUCCESS) {
2093 ehea_error("query_ehea_qp failed (4)");
2094 goto out;
2095 }
2096
2097 ret = 0;
2098 out:
2099 kfree(cb0);
2100 return ret;
2101 }
2102
2103 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2104 int add_tx_qps)
2105 {
2106 int ret, i;
2107 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2108 enum ehea_eq_type eq_type = EHEA_EQ;
2109
2110 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2111 EHEA_MAX_ENTRIES_EQ, 1);
2112 if (!port->qp_eq) {
2113 ret = -EINVAL;
2114 ehea_error("ehea_create_eq failed (qp_eq)");
2115 goto out_kill_eq;
2116 }
2117
2118 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2119 pr_cfg.max_entries_scq = sq_entries * 2;
2120 pr_cfg.max_entries_sq = sq_entries;
2121 pr_cfg.max_entries_rq1 = rq1_entries;
2122 pr_cfg.max_entries_rq2 = rq2_entries;
2123 pr_cfg.max_entries_rq3 = rq3_entries;
2124
2125 pr_cfg_small_rx.max_entries_rcq = 1;
2126 pr_cfg_small_rx.max_entries_scq = sq_entries;
2127 pr_cfg_small_rx.max_entries_sq = sq_entries;
2128 pr_cfg_small_rx.max_entries_rq1 = 1;
2129 pr_cfg_small_rx.max_entries_rq2 = 1;
2130 pr_cfg_small_rx.max_entries_rq3 = 1;
2131
2132 for (i = 0; i < def_qps; i++) {
2133 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2134 if (ret)
2135 goto out_clean_pr;
2136 }
2137 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2138 ret = ehea_init_port_res(port, &port->port_res[i],
2139 &pr_cfg_small_rx, i);
2140 if (ret)
2141 goto out_clean_pr;
2142 }
2143
2144 return 0;
2145
2146 out_clean_pr:
2147 while (--i >= 0)
2148 ehea_clean_portres(port, &port->port_res[i]);
2149
2150 out_kill_eq:
2151 ehea_destroy_eq(port->qp_eq);
2152 return ret;
2153 }
2154
2155 static int ehea_clean_all_portres(struct ehea_port *port)
2156 {
2157 int ret = 0;
2158 int i;
2159
2160 for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2161 ret |= ehea_clean_portres(port, &port->port_res[i]);
2162
2163 ret |= ehea_destroy_eq(port->qp_eq);
2164
2165 return ret;
2166 }
2167
2168 static void ehea_remove_adapter_mr (struct ehea_adapter *adapter)
2169 {
2170 int i;
2171
2172 for (i=0; i < EHEA_MAX_PORTS; i++)
2173 if (adapter->port[i])
2174 return;
2175
2176 ehea_rem_mr(&adapter->mr);
2177 }
2178
2179 static int ehea_add_adapter_mr (struct ehea_adapter *adapter)
2180 {
2181 int i;
2182
2183 for (i=0; i < EHEA_MAX_PORTS; i++)
2184 if (adapter->port[i])
2185 return 0;
2186
2187 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2188 }
2189
2190 static int ehea_up(struct net_device *dev)
2191 {
2192 int ret, i;
2193 struct ehea_port *port = netdev_priv(dev);
2194
2195 if (port->state == EHEA_PORT_UP)
2196 return 0;
2197
2198 ret = ehea_port_res_setup(port, port->num_def_qps,
2199 port->num_add_tx_qps);
2200 if (ret) {
2201 ehea_error("port_res_failed");
2202 goto out;
2203 }
2204
2205 /* Set default QP for this port */
2206 ret = ehea_configure_port(port);
2207 if (ret) {
2208 ehea_error("ehea_configure_port failed. ret:%d", ret);
2209 goto out_clean_pr;
2210 }
2211
2212 ret = ehea_reg_interrupts(dev);
2213 if (ret) {
2214 ehea_error("reg_interrupts failed. ret:%d", ret);
2215 goto out_clean_pr;
2216 }
2217
2218 for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2219 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2220 if (ret) {
2221 ehea_error("activate_qp failed");
2222 goto out_free_irqs;
2223 }
2224 }
2225
2226 for(i = 0; i < port->num_def_qps; i++) {
2227 ret = ehea_fill_port_res(&port->port_res[i]);
2228 if (ret) {
2229 ehea_error("out_free_irqs");
2230 goto out_free_irqs;
2231 }
2232 }
2233
2234 ret = 0;
2235 port->state = EHEA_PORT_UP;
2236 goto out;
2237
2238 out_free_irqs:
2239 ehea_free_interrupts(dev);
2240
2241 out_clean_pr:
2242 ehea_clean_all_portres(port);
2243 out:
2244 if (ret)
2245 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2246
2247 return ret;
2248 }
2249
2250 static int ehea_open(struct net_device *dev)
2251 {
2252 int ret;
2253 struct ehea_port *port = netdev_priv(dev);
2254
2255 down(&port->port_lock);
2256
2257 if (netif_msg_ifup(port))
2258 ehea_info("enabling port %s", dev->name);
2259
2260 ret = ehea_up(dev);
2261 if (!ret)
2262 netif_start_queue(dev);
2263
2264 up(&port->port_lock);
2265
2266 return ret;
2267 }
2268
2269 static int ehea_down(struct net_device *dev)
2270 {
2271 int ret, i;
2272 struct ehea_port *port = netdev_priv(dev);
2273
2274 if (port->state == EHEA_PORT_DOWN)
2275 return 0;
2276
2277 ehea_drop_multicast_list(dev);
2278 ehea_free_interrupts(dev);
2279
2280 for (i = 0; i < port->num_def_qps; i++)
2281 while (test_bit(__LINK_STATE_RX_SCHED,
2282 &port->port_res[i].d_netdev->state))
2283 msleep(1);
2284
2285 port->state = EHEA_PORT_DOWN;
2286
2287 ret = ehea_clean_all_portres(port);
2288 if (ret)
2289 ehea_info("Failed freeing resources for %s. ret=%i",
2290 dev->name, ret);
2291
2292 return ret;
2293 }
2294
2295 static int ehea_stop(struct net_device *dev)
2296 {
2297 int ret;
2298 struct ehea_port *port = netdev_priv(dev);
2299
2300 if (netif_msg_ifdown(port))
2301 ehea_info("disabling port %s", dev->name);
2302
2303 flush_workqueue(port->adapter->ehea_wq);
2304 down(&port->port_lock);
2305 netif_stop_queue(dev);
2306 ret = ehea_down(dev);
2307 up(&port->port_lock);
2308 return ret;
2309 }
2310
2311 static void ehea_reset_port(struct work_struct *work)
2312 {
2313 int ret;
2314 struct ehea_port *port =
2315 container_of(work, struct ehea_port, reset_task);
2316 struct net_device *dev = port->netdev;
2317
2318 port->resets++;
2319 down(&port->port_lock);
2320 netif_stop_queue(dev);
2321 netif_poll_disable(dev);
2322
2323 ehea_down(dev);
2324
2325 ret = ehea_up(dev);
2326 if (ret)
2327 goto out;
2328
2329 if (netif_msg_timer(port))
2330 ehea_info("Device %s resetted successfully", dev->name);
2331
2332 netif_poll_enable(dev);
2333 netif_wake_queue(dev);
2334 out:
2335 up(&port->port_lock);
2336 return;
2337 }
2338
2339 static void ehea_rereg_mrs(struct work_struct *work)
2340 {
2341 int ret, i;
2342 struct ehea_adapter *adapter;
2343
2344 ehea_info("LPAR memory enlarged - re-initializing driver");
2345
2346 list_for_each_entry(adapter, &adapter_list, list)
2347 if (adapter->active_ports) {
2348 /* Shutdown all ports */
2349 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2350 struct ehea_port *port = adapter->port[i];
2351
2352 if (port) {
2353 struct net_device *dev = port->netdev;
2354
2355 if (dev->flags & IFF_UP) {
2356 ehea_info("stopping %s",
2357 dev->name);
2358 down(&port->port_lock);
2359 netif_stop_queue(dev);
2360 netif_poll_disable(dev);
2361 ehea_down(dev);
2362 up(&port->port_lock);
2363 }
2364 }
2365 }
2366
2367 /* Unregister old memory region */
2368 ret = ehea_rem_mr(&adapter->mr);
2369 if (ret) {
2370 ehea_error("unregister MR failed - driver"
2371 " inoperable!");
2372 goto out;
2373 }
2374 }
2375
2376 ehea_destroy_busmap();
2377
2378 ret = ehea_create_busmap();
2379 if (ret)
2380 goto out;
2381
2382 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2383
2384 list_for_each_entry(adapter, &adapter_list, list)
2385 if (adapter->active_ports) {
2386 /* Register new memory region */
2387 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2388 if (ret) {
2389 ehea_error("register MR failed - driver"
2390 " inoperable!");
2391 goto out;
2392 }
2393
2394 /* Restart all ports */
2395 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2396 struct ehea_port *port = adapter->port[i];
2397
2398 if (port) {
2399 struct net_device *dev = port->netdev;
2400
2401 if (dev->flags & IFF_UP) {
2402 ehea_info("restarting %s",
2403 dev->name);
2404 down(&port->port_lock);
2405
2406 ret = ehea_up(dev);
2407 if (!ret) {
2408 netif_poll_enable(dev);
2409 netif_wake_queue(dev);
2410 }
2411
2412 up(&port->port_lock);
2413 }
2414 }
2415 }
2416 }
2417 out:
2418 return;
2419 }
2420
2421 static void ehea_tx_watchdog(struct net_device *dev)
2422 {
2423 struct ehea_port *port = netdev_priv(dev);
2424
2425 if (netif_carrier_ok(dev))
2426 queue_work(port->adapter->ehea_wq, &port->reset_task);
2427 }
2428
2429 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2430 {
2431 struct hcp_query_ehea *cb;
2432 u64 hret;
2433 int ret;
2434
2435 cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2436 if (!cb) {
2437 ret = -ENOMEM;
2438 goto out;
2439 }
2440
2441 hret = ehea_h_query_ehea(adapter->handle, cb);
2442
2443 if (hret != H_SUCCESS) {
2444 ret = -EIO;
2445 goto out_herr;
2446 }
2447
2448 adapter->max_mc_mac = cb->max_mc_mac - 1;
2449 ret = 0;
2450
2451 out_herr:
2452 kfree(cb);
2453 out:
2454 return ret;
2455 }
2456
2457 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2458 {
2459 struct hcp_ehea_port_cb4 *cb4;
2460 u64 hret;
2461 int ret = 0;
2462
2463 *jumbo = 0;
2464
2465 /* (Try to) enable *jumbo frames */
2466 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2467 if (!cb4) {
2468 ehea_error("no mem for cb4");
2469 ret = -ENOMEM;
2470 goto out;
2471 } else {
2472 hret = ehea_h_query_ehea_port(port->adapter->handle,
2473 port->logical_port_id,
2474 H_PORT_CB4,
2475 H_PORT_CB4_JUMBO, cb4);
2476 if (hret == H_SUCCESS) {
2477 if (cb4->jumbo_frame)
2478 *jumbo = 1;
2479 else {
2480 cb4->jumbo_frame = 1;
2481 hret = ehea_h_modify_ehea_port(port->adapter->
2482 handle,
2483 port->
2484 logical_port_id,
2485 H_PORT_CB4,
2486 H_PORT_CB4_JUMBO,
2487 cb4);
2488 if (hret == H_SUCCESS)
2489 *jumbo = 1;
2490 }
2491 } else
2492 ret = -EINVAL;
2493
2494 kfree(cb4);
2495 }
2496 out:
2497 return ret;
2498 }
2499
2500 static ssize_t ehea_show_port_id(struct device *dev,
2501 struct device_attribute *attr, char *buf)
2502 {
2503 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2504 return sprintf(buf, "0x%X", port->logical_port_id);
2505 }
2506
2507 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2508 NULL);
2509
2510 static void __devinit logical_port_release(struct device *dev)
2511 {
2512 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2513 of_node_put(port->ofdev.node);
2514 }
2515
2516 static int ehea_driver_sysfs_add(struct device *dev,
2517 struct device_driver *driver)
2518 {
2519 int ret;
2520
2521 ret = sysfs_create_link(&driver->kobj, &dev->kobj,
2522 kobject_name(&dev->kobj));
2523 if (ret == 0) {
2524 ret = sysfs_create_link(&dev->kobj, &driver->kobj,
2525 "driver");
2526 if (ret)
2527 sysfs_remove_link(&driver->kobj,
2528 kobject_name(&dev->kobj));
2529 }
2530 return ret;
2531 }
2532
2533 static void ehea_driver_sysfs_remove(struct device *dev,
2534 struct device_driver *driver)
2535 {
2536 struct device_driver *drv = driver;
2537
2538 if (drv) {
2539 sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
2540 sysfs_remove_link(&dev->kobj, "driver");
2541 }
2542 }
2543
2544 static struct device *ehea_register_port(struct ehea_port *port,
2545 struct device_node *dn)
2546 {
2547 int ret;
2548
2549 port->ofdev.node = of_node_get(dn);
2550 port->ofdev.dev.parent = &port->adapter->ebus_dev->ofdev.dev;
2551 port->ofdev.dev.bus = &ibmebus_bus_type;
2552
2553 sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
2554 port->ofdev.dev.release = logical_port_release;
2555
2556 ret = of_device_register(&port->ofdev);
2557 if (ret) {
2558 ehea_error("failed to register device. ret=%d", ret);
2559 goto out;
2560 }
2561
2562 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2563 if (ret) {
2564 ehea_error("failed to register attributes, ret=%d", ret);
2565 goto out_unreg_of_dev;
2566 }
2567
2568 ret = ehea_driver_sysfs_add(&port->ofdev.dev, &ehea_driver.driver);
2569 if (ret) {
2570 ehea_error("failed to register sysfs driver link");
2571 goto out_rem_dev_file;
2572 }
2573
2574 return &port->ofdev.dev;
2575
2576 out_rem_dev_file:
2577 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2578 out_unreg_of_dev:
2579 of_device_unregister(&port->ofdev);
2580 out:
2581 return NULL;
2582 }
2583
2584 static void ehea_unregister_port(struct ehea_port *port)
2585 {
2586 ehea_driver_sysfs_remove(&port->ofdev.dev, &ehea_driver.driver);
2587 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2588 of_device_unregister(&port->ofdev);
2589 }
2590
2591 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2592 u32 logical_port_id,
2593 struct device_node *dn)
2594 {
2595 int ret;
2596 struct net_device *dev;
2597 struct ehea_port *port;
2598 struct device *port_dev;
2599 int jumbo;
2600
2601 /* allocate memory for the port structures */
2602 dev = alloc_etherdev(sizeof(struct ehea_port));
2603
2604 if (!dev) {
2605 ehea_error("no mem for net_device");
2606 ret = -ENOMEM;
2607 goto out_err;
2608 }
2609
2610 port = netdev_priv(dev);
2611
2612 sema_init(&port->port_lock, 1);
2613 port->state = EHEA_PORT_DOWN;
2614 port->sig_comp_iv = sq_entries / 10;
2615
2616 port->adapter = adapter;
2617 port->netdev = dev;
2618 port->logical_port_id = logical_port_id;
2619
2620 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2621
2622 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2623 if (!port->mc_list) {
2624 ret = -ENOMEM;
2625 goto out_free_ethdev;
2626 }
2627
2628 INIT_LIST_HEAD(&port->mc_list->list);
2629
2630 ret = ehea_sense_port_attr(port);
2631 if (ret)
2632 goto out_free_mc_list;
2633
2634 port_dev = ehea_register_port(port, dn);
2635 if (!port_dev)
2636 goto out_free_mc_list;
2637
2638 SET_NETDEV_DEV(dev, port_dev);
2639
2640 /* initialize net_device structure */
2641 SET_MODULE_OWNER(dev);
2642
2643 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2644
2645 dev->open = ehea_open;
2646 dev->poll = ehea_poll_firstqueue;
2647 #ifdef CONFIG_NET_POLL_CONTROLLER
2648 dev->poll_controller = ehea_netpoll;
2649 #endif
2650 dev->weight = 64;
2651 dev->stop = ehea_stop;
2652 dev->hard_start_xmit = ehea_start_xmit;
2653 dev->get_stats = ehea_get_stats;
2654 dev->set_multicast_list = ehea_set_multicast_list;
2655 dev->set_mac_address = ehea_set_mac_addr;
2656 dev->change_mtu = ehea_change_mtu;
2657 dev->vlan_rx_register = ehea_vlan_rx_register;
2658 dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2659 dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2660 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2661 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2662 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2663 | NETIF_F_LLTX;
2664 dev->tx_timeout = &ehea_tx_watchdog;
2665 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2666
2667 INIT_WORK(&port->reset_task, ehea_reset_port);
2668
2669 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2670 if (ret) {
2671 ret = -EIO;
2672 goto out_unreg_port;
2673 }
2674
2675 ehea_set_ethtool_ops(dev);
2676
2677 ret = register_netdev(dev);
2678 if (ret) {
2679 ehea_error("register_netdev failed. ret=%d", ret);
2680 goto out_dereg_bc;
2681 }
2682
2683 ret = ehea_get_jumboframe_status(port, &jumbo);
2684 if (ret)
2685 ehea_error("failed determining jumbo frame status for %s",
2686 port->netdev->name);
2687
2688 ehea_info("%s: Jumbo frames are %sabled", dev->name,
2689 jumbo == 1 ? "en" : "dis");
2690
2691 adapter->active_ports++;
2692
2693 return port;
2694
2695 out_dereg_bc:
2696 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2697
2698 out_unreg_port:
2699 ehea_unregister_port(port);
2700
2701 out_free_mc_list:
2702 kfree(port->mc_list);
2703
2704 out_free_ethdev:
2705 free_netdev(dev);
2706
2707 out_err:
2708 ehea_error("setting up logical port with id=%d failed, ret=%d",
2709 logical_port_id, ret);
2710 return NULL;
2711 }
2712
2713 static void ehea_shutdown_single_port(struct ehea_port *port)
2714 {
2715 unregister_netdev(port->netdev);
2716 ehea_unregister_port(port);
2717 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2718 kfree(port->mc_list);
2719 free_netdev(port->netdev);
2720 port->adapter->active_ports--;
2721 }
2722
2723 static int ehea_setup_ports(struct ehea_adapter *adapter)
2724 {
2725 struct device_node *lhea_dn;
2726 struct device_node *eth_dn = NULL;
2727
2728 const u32 *dn_log_port_id;
2729 int i = 0;
2730
2731 lhea_dn = adapter->ebus_dev->ofdev.node;
2732 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
2733
2734 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
2735 NULL);
2736 if (!dn_log_port_id) {
2737 ehea_error("bad device node: eth_dn name=%s",
2738 eth_dn->full_name);
2739 continue;
2740 }
2741
2742 if (ehea_add_adapter_mr(adapter)) {
2743 ehea_error("creating MR failed");
2744 of_node_put(eth_dn);
2745 return -EIO;
2746 }
2747
2748 adapter->port[i] = ehea_setup_single_port(adapter,
2749 *dn_log_port_id,
2750 eth_dn);
2751 if (adapter->port[i])
2752 ehea_info("%s -> logical port id #%d",
2753 adapter->port[i]->netdev->name,
2754 *dn_log_port_id);
2755 else
2756 ehea_remove_adapter_mr(adapter);
2757
2758 i++;
2759 };
2760
2761 return 0;
2762 }
2763
2764 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
2765 u32 logical_port_id)
2766 {
2767 struct device_node *lhea_dn;
2768 struct device_node *eth_dn = NULL;
2769 const u32 *dn_log_port_id;
2770
2771 lhea_dn = adapter->ebus_dev->ofdev.node;
2772 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
2773
2774 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
2775 NULL);
2776 if (dn_log_port_id)
2777 if (*dn_log_port_id == logical_port_id)
2778 return eth_dn;
2779 };
2780
2781 return NULL;
2782 }
2783
2784 static ssize_t ehea_probe_port(struct device *dev,
2785 struct device_attribute *attr,
2786 const char *buf, size_t count)
2787 {
2788 struct ehea_adapter *adapter = dev->driver_data;
2789 struct ehea_port *port;
2790 struct device_node *eth_dn = NULL;
2791 int i;
2792
2793 u32 logical_port_id;
2794
2795 sscanf(buf, "%X", &logical_port_id);
2796
2797 port = ehea_get_port(adapter, logical_port_id);
2798
2799 if (port) {
2800 ehea_info("adding port with logical port id=%d failed. port "
2801 "already configured as %s.", logical_port_id,
2802 port->netdev->name);
2803 return -EINVAL;
2804 }
2805
2806 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
2807
2808 if (!eth_dn) {
2809 ehea_info("no logical port with id %d found", logical_port_id);
2810 return -EINVAL;
2811 }
2812
2813 if (ehea_add_adapter_mr(adapter)) {
2814 ehea_error("creating MR failed");
2815 return -EIO;
2816 }
2817
2818 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
2819
2820 of_node_put(eth_dn);
2821
2822 if (port) {
2823 for (i=0; i < EHEA_MAX_PORTS; i++)
2824 if (!adapter->port[i]) {
2825 adapter->port[i] = port;
2826 break;
2827 }
2828
2829 ehea_info("added %s (logical port id=%d)", port->netdev->name,
2830 logical_port_id);
2831 } else {
2832 ehea_remove_adapter_mr(adapter);
2833 return -EIO;
2834 }
2835
2836 return (ssize_t) count;
2837 }
2838
2839 static ssize_t ehea_remove_port(struct device *dev,
2840 struct device_attribute *attr,
2841 const char *buf, size_t count)
2842 {
2843 struct ehea_adapter *adapter = dev->driver_data;
2844 struct ehea_port *port;
2845 int i;
2846 u32 logical_port_id;
2847
2848 sscanf(buf, "%X", &logical_port_id);
2849
2850 port = ehea_get_port(adapter, logical_port_id);
2851
2852 if (port) {
2853 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
2854 logical_port_id);
2855
2856 ehea_shutdown_single_port(port);
2857
2858 for (i=0; i < EHEA_MAX_PORTS; i++)
2859 if (adapter->port[i] == port) {
2860 adapter->port[i] = NULL;
2861 break;
2862 }
2863 } else {
2864 ehea_error("removing port with logical port id=%d failed. port "
2865 "not configured.", logical_port_id);
2866 return -EINVAL;
2867 }
2868
2869 ehea_remove_adapter_mr(adapter);
2870
2871 return (ssize_t) count;
2872 }
2873
2874 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
2875 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
2876
2877 int ehea_create_device_sysfs(struct ibmebus_dev *dev)
2878 {
2879 int ret = device_create_file(&dev->ofdev.dev, &dev_attr_probe_port);
2880 if (ret)
2881 goto out;
2882
2883 ret = device_create_file(&dev->ofdev.dev, &dev_attr_remove_port);
2884 out:
2885 return ret;
2886 }
2887
2888 void ehea_remove_device_sysfs(struct ibmebus_dev *dev)
2889 {
2890 device_remove_file(&dev->ofdev.dev, &dev_attr_probe_port);
2891 device_remove_file(&dev->ofdev.dev, &dev_attr_remove_port);
2892 }
2893
2894 static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
2895 const struct of_device_id *id)
2896 {
2897 struct ehea_adapter *adapter;
2898 const u64 *adapter_handle;
2899 int ret;
2900
2901 if (!dev || !dev->ofdev.node) {
2902 ehea_error("Invalid ibmebus device probed");
2903 return -EINVAL;
2904 }
2905
2906 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2907 if (!adapter) {
2908 ret = -ENOMEM;
2909 dev_err(&dev->ofdev.dev, "no mem for ehea_adapter\n");
2910 goto out;
2911 }
2912
2913 list_add(&adapter->list, &adapter_list);
2914
2915 adapter->ebus_dev = dev;
2916
2917 adapter_handle = of_get_property(dev->ofdev.node, "ibm,hea-handle",
2918 NULL);
2919 if (adapter_handle)
2920 adapter->handle = *adapter_handle;
2921
2922 if (!adapter->handle) {
2923 dev_err(&dev->ofdev.dev, "failed getting handle for adapter"
2924 " '%s'\n", dev->ofdev.node->full_name);
2925 ret = -ENODEV;
2926 goto out_free_ad;
2927 }
2928
2929 adapter->pd = EHEA_PD_ID;
2930
2931 dev->ofdev.dev.driver_data = adapter;
2932
2933
2934 /* initialize adapter and ports */
2935 /* get adapter properties */
2936 ret = ehea_sense_adapter_attr(adapter);
2937 if (ret) {
2938 dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret);
2939 goto out_free_ad;
2940 }
2941
2942 adapter->neq = ehea_create_eq(adapter,
2943 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
2944 if (!adapter->neq) {
2945 ret = -EIO;
2946 dev_err(&dev->ofdev.dev, "NEQ creation failed");
2947 goto out_free_ad;
2948 }
2949
2950 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
2951 (unsigned long)adapter);
2952
2953 ret = ibmebus_request_irq(NULL, adapter->neq->attr.ist1,
2954 ehea_interrupt_neq, IRQF_DISABLED,
2955 "ehea_neq", adapter);
2956 if (ret) {
2957 dev_err(&dev->ofdev.dev, "requesting NEQ IRQ failed");
2958 goto out_kill_eq;
2959 }
2960
2961 adapter->ehea_wq = create_workqueue("ehea_wq");
2962 if (!adapter->ehea_wq) {
2963 ret = -EIO;
2964 goto out_free_irq;
2965 }
2966
2967 ret = ehea_create_device_sysfs(dev);
2968 if (ret)
2969 goto out_kill_wq;
2970
2971 ret = ehea_setup_ports(adapter);
2972 if (ret) {
2973 dev_err(&dev->ofdev.dev, "setup_ports failed");
2974 goto out_rem_dev_sysfs;
2975 }
2976
2977 ret = 0;
2978 goto out;
2979
2980 out_rem_dev_sysfs:
2981 ehea_remove_device_sysfs(dev);
2982
2983 out_kill_wq:
2984 destroy_workqueue(adapter->ehea_wq);
2985
2986 out_free_irq:
2987 ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
2988
2989 out_kill_eq:
2990 ehea_destroy_eq(adapter->neq);
2991
2992 out_free_ad:
2993 kfree(adapter);
2994 out:
2995 return ret;
2996 }
2997
2998 static int __devexit ehea_remove(struct ibmebus_dev *dev)
2999 {
3000 struct ehea_adapter *adapter = dev->ofdev.dev.driver_data;
3001 int i;
3002
3003 for (i = 0; i < EHEA_MAX_PORTS; i++)
3004 if (adapter->port[i]) {
3005 ehea_shutdown_single_port(adapter->port[i]);
3006 adapter->port[i] = NULL;
3007 }
3008
3009 ehea_remove_device_sysfs(dev);
3010
3011 destroy_workqueue(adapter->ehea_wq);
3012
3013 ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
3014 tasklet_kill(&adapter->neq_tasklet);
3015
3016 ehea_destroy_eq(adapter->neq);
3017 ehea_remove_adapter_mr(adapter);
3018 list_del(&adapter->list);
3019
3020 kfree(adapter);
3021
3022 return 0;
3023 }
3024
3025 static int check_module_parm(void)
3026 {
3027 int ret = 0;
3028
3029 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3030 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3031 ehea_info("Bad parameter: rq1_entries");
3032 ret = -EINVAL;
3033 }
3034 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3035 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3036 ehea_info("Bad parameter: rq2_entries");
3037 ret = -EINVAL;
3038 }
3039 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3040 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3041 ehea_info("Bad parameter: rq3_entries");
3042 ret = -EINVAL;
3043 }
3044 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3045 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3046 ehea_info("Bad parameter: sq_entries");
3047 ret = -EINVAL;
3048 }
3049
3050 return ret;
3051 }
3052
3053 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3054 char *buf)
3055 {
3056 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3057 }
3058
3059 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3060 ehea_show_capabilities, NULL);
3061
3062 int __init ehea_module_init(void)
3063 {
3064 int ret;
3065
3066 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3067 DRV_VERSION);
3068
3069 ehea_driver_wq = create_workqueue("ehea_driver_wq");
3070
3071 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3072
3073 ret = check_module_parm();
3074 if (ret)
3075 goto out;
3076
3077 ret = ehea_create_busmap();
3078 if (ret)
3079 goto out;
3080
3081 ret = ibmebus_register_driver(&ehea_driver);
3082 if (ret) {
3083 ehea_error("failed registering eHEA device driver on ebus");
3084 goto out;
3085 }
3086
3087 ret = driver_create_file(&ehea_driver.driver,
3088 &driver_attr_capabilities);
3089 if (ret) {
3090 ehea_error("failed to register capabilities attribute, ret=%d",
3091 ret);
3092 ibmebus_unregister_driver(&ehea_driver);
3093 goto out;
3094 }
3095
3096 out:
3097 return ret;
3098 }
3099
3100 static void __exit ehea_module_exit(void)
3101 {
3102 destroy_workqueue(ehea_driver_wq);
3103 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3104 ibmebus_unregister_driver(&ehea_driver);
3105 ehea_destroy_busmap();
3106 }
3107
3108 module_init(ehea_module_init);
3109 module_exit(ehea_module_exit);
Linux kernel - Deliverables
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