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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
[mirror_ubuntu-bionic-kernel.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 <linux/notifier.h>
37 #include <linux/reboot.h>
38
39 #include <net/ip.h>
40
41 #include "ehea.h"
42 #include "ehea_qmr.h"
43 #include "ehea_phyp.h"
44
45
46 MODULE_LICENSE("GPL");
47 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
48 MODULE_DESCRIPTION("IBM eServer HEA Driver");
49 MODULE_VERSION(DRV_VERSION);
50
51
52 static int msg_level = -1;
53 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
54 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
55 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
56 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
57 static int use_mcs = 0;
58 static int use_lro = 0;
59 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
60 static int num_tx_qps = EHEA_NUM_TX_QP;
61 static int prop_carrier_state = 0;
62
63 module_param(msg_level, int, 0);
64 module_param(rq1_entries, int, 0);
65 module_param(rq2_entries, int, 0);
66 module_param(rq3_entries, int, 0);
67 module_param(sq_entries, int, 0);
68 module_param(prop_carrier_state, int, 0);
69 module_param(use_mcs, int, 0);
70 module_param(use_lro, int, 0);
71 module_param(lro_max_aggr, int, 0);
72 module_param(num_tx_qps, int, 0);
73
74 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
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, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
91
92 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
93 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
94 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
95 "Default = 0");
96
97 static int port_name_cnt = 0;
98 static LIST_HEAD(adapter_list);
99 u64 ehea_driver_flags = 0;
100 struct work_struct ehea_rereg_mr_task;
101
102 struct semaphore dlpar_mem_lock;
103
104 static int __devinit ehea_probe_adapter(struct of_device *dev,
105 const struct of_device_id *id);
106
107 static int __devexit ehea_remove(struct of_device *dev);
108
109 static struct of_device_id ehea_device_table[] = {
110 {
111 .name = "lhea",
112 .compatible = "IBM,lhea",
113 },
114 {},
115 };
116
117 static struct of_platform_driver ehea_driver = {
118 .name = "ehea",
119 .match_table = ehea_device_table,
120 .probe = ehea_probe_adapter,
121 .remove = ehea_remove,
122 };
123
124 void ehea_dump(void *adr, int len, char *msg) {
125 int x;
126 unsigned char *deb = adr;
127 for (x = 0; x < len; x += 16) {
128 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
129 deb, x, *((u64*)&deb[0]), *((u64*)&deb[8]));
130 deb += 16;
131 }
132 }
133
134 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
135 {
136 struct ehea_port *port = netdev_priv(dev);
137 struct net_device_stats *stats = &port->stats;
138 struct hcp_ehea_port_cb2 *cb2;
139 u64 hret, rx_packets, tx_packets;
140 int i;
141
142 memset(stats, 0, sizeof(*stats));
143
144 cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
145 if (!cb2) {
146 ehea_error("no mem for cb2");
147 goto out;
148 }
149
150 hret = ehea_h_query_ehea_port(port->adapter->handle,
151 port->logical_port_id,
152 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
153 if (hret != H_SUCCESS) {
154 ehea_error("query_ehea_port failed");
155 goto out_herr;
156 }
157
158 if (netif_msg_hw(port))
159 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
160
161 rx_packets = 0;
162 for (i = 0; i < port->num_def_qps; i++)
163 rx_packets += port->port_res[i].rx_packets;
164
165 tx_packets = 0;
166 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
167 tx_packets += port->port_res[i].tx_packets;
168
169 stats->tx_packets = tx_packets;
170 stats->multicast = cb2->rxmcp;
171 stats->rx_errors = cb2->rxuerr;
172 stats->rx_bytes = cb2->rxo;
173 stats->tx_bytes = cb2->txo;
174 stats->rx_packets = rx_packets;
175
176 out_herr:
177 kfree(cb2);
178 out:
179 return stats;
180 }
181
182 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
183 {
184 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
185 struct net_device *dev = pr->port->netdev;
186 int max_index_mask = pr->rq1_skba.len - 1;
187 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
188 int adder = 0;
189 int i;
190
191 pr->rq1_skba.os_skbs = 0;
192
193 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
194 pr->rq1_skba.index = index;
195 pr->rq1_skba.os_skbs = fill_wqes;
196 return;
197 }
198
199 for (i = 0; i < fill_wqes; i++) {
200 if (!skb_arr_rq1[index]) {
201 skb_arr_rq1[index] = netdev_alloc_skb(dev,
202 EHEA_L_PKT_SIZE);
203 if (!skb_arr_rq1[index]) {
204 pr->rq1_skba.os_skbs = fill_wqes - i;
205 ehea_error("%s: no mem for skb/%d wqes filled",
206 dev->name, i);
207 break;
208 }
209 }
210 index--;
211 index &= max_index_mask;
212 adder++;
213 }
214
215 if (adder == 0)
216 return;
217
218 /* Ring doorbell */
219 ehea_update_rq1a(pr->qp, adder);
220 }
221
222 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
223 {
224 int ret = 0;
225 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
226 struct net_device *dev = pr->port->netdev;
227 int i;
228
229 for (i = 0; i < pr->rq1_skba.len; i++) {
230 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
231 if (!skb_arr_rq1[i]) {
232 ehea_error("%s: no mem for skb/%d wqes filled",
233 dev->name, i);
234 ret = -ENOMEM;
235 goto out;
236 }
237 }
238 /* Ring doorbell */
239 ehea_update_rq1a(pr->qp, nr_rq1a);
240 out:
241 return ret;
242 }
243
244 static int ehea_refill_rq_def(struct ehea_port_res *pr,
245 struct ehea_q_skb_arr *q_skba, int rq_nr,
246 int num_wqes, int wqe_type, int packet_size)
247 {
248 struct net_device *dev = pr->port->netdev;
249 struct ehea_qp *qp = pr->qp;
250 struct sk_buff **skb_arr = q_skba->arr;
251 struct ehea_rwqe *rwqe;
252 int i, index, max_index_mask, fill_wqes;
253 int adder = 0;
254 int ret = 0;
255
256 fill_wqes = q_skba->os_skbs + num_wqes;
257 q_skba->os_skbs = 0;
258
259 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
260 q_skba->os_skbs = fill_wqes;
261 return ret;
262 }
263
264 index = q_skba->index;
265 max_index_mask = q_skba->len - 1;
266 for (i = 0; i < fill_wqes; i++) {
267 u64 tmp_addr;
268 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
269 if (!skb) {
270 ehea_error("%s: no mem for skb/%d wqes filled",
271 pr->port->netdev->name, i);
272 q_skba->os_skbs = fill_wqes - i;
273 ret = -ENOMEM;
274 break;
275 }
276 skb_reserve(skb, NET_IP_ALIGN);
277
278 skb_arr[index] = skb;
279 tmp_addr = ehea_map_vaddr(skb->data);
280 if (tmp_addr == -1) {
281 dev_kfree_skb(skb);
282 q_skba->os_skbs = fill_wqes - i;
283 ret = 0;
284 break;
285 }
286
287 rwqe = ehea_get_next_rwqe(qp, rq_nr);
288 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
289 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
290 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
291 rwqe->sg_list[0].vaddr = tmp_addr;
292 rwqe->sg_list[0].len = packet_size;
293 rwqe->data_segments = 1;
294
295 index++;
296 index &= max_index_mask;
297 adder++;
298 }
299
300 q_skba->index = index;
301 if (adder == 0)
302 goto out;
303
304 /* Ring doorbell */
305 iosync();
306 if (rq_nr == 2)
307 ehea_update_rq2a(pr->qp, adder);
308 else
309 ehea_update_rq3a(pr->qp, adder);
310 out:
311 return ret;
312 }
313
314
315 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
316 {
317 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
318 nr_of_wqes, EHEA_RWQE2_TYPE,
319 EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
320 }
321
322
323 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
324 {
325 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
326 nr_of_wqes, EHEA_RWQE3_TYPE,
327 EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
328 }
329
330 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
331 {
332 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
333 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
334 return 0;
335 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
336 (cqe->header_length == 0))
337 return 0;
338 return -EINVAL;
339 }
340
341 static inline void ehea_fill_skb(struct net_device *dev,
342 struct sk_buff *skb, struct ehea_cqe *cqe)
343 {
344 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
345
346 skb_put(skb, length);
347 skb->ip_summed = CHECKSUM_UNNECESSARY;
348 skb->protocol = eth_type_trans(skb, dev);
349 }
350
351 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
352 int arr_len,
353 struct ehea_cqe *cqe)
354 {
355 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
356 struct sk_buff *skb;
357 void *pref;
358 int x;
359
360 x = skb_index + 1;
361 x &= (arr_len - 1);
362
363 pref = skb_array[x];
364 prefetchw(pref);
365 prefetchw(pref + EHEA_CACHE_LINE);
366
367 pref = (skb_array[x]->data);
368 prefetch(pref);
369 prefetch(pref + EHEA_CACHE_LINE);
370 prefetch(pref + EHEA_CACHE_LINE * 2);
371 prefetch(pref + EHEA_CACHE_LINE * 3);
372 skb = skb_array[skb_index];
373 skb_array[skb_index] = NULL;
374 return skb;
375 }
376
377 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
378 int arr_len, int wqe_index)
379 {
380 struct sk_buff *skb;
381 void *pref;
382 int x;
383
384 x = wqe_index + 1;
385 x &= (arr_len - 1);
386
387 pref = skb_array[x];
388 prefetchw(pref);
389 prefetchw(pref + EHEA_CACHE_LINE);
390
391 pref = (skb_array[x]->data);
392 prefetchw(pref);
393 prefetchw(pref + EHEA_CACHE_LINE);
394
395 skb = skb_array[wqe_index];
396 skb_array[wqe_index] = NULL;
397 return skb;
398 }
399
400 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
401 struct ehea_cqe *cqe, int *processed_rq2,
402 int *processed_rq3)
403 {
404 struct sk_buff *skb;
405
406 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
407 pr->p_stats.err_tcp_cksum++;
408 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
409 pr->p_stats.err_ip_cksum++;
410 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
411 pr->p_stats.err_frame_crc++;
412
413 if (rq == 2) {
414 *processed_rq2 += 1;
415 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
416 dev_kfree_skb(skb);
417 } else if (rq == 3) {
418 *processed_rq3 += 1;
419 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
420 dev_kfree_skb(skb);
421 }
422
423 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
424 if (netif_msg_rx_err(pr->port)) {
425 ehea_error("Critical receive error for QP %d. "
426 "Resetting port.", pr->qp->init_attr.qp_nr);
427 ehea_dump(cqe, sizeof(*cqe), "CQE");
428 }
429 schedule_work(&pr->port->reset_task);
430 return 1;
431 }
432
433 return 0;
434 }
435
436 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
437 void **tcph, u64 *hdr_flags, void *priv)
438 {
439 struct ehea_cqe *cqe = priv;
440 unsigned int ip_len;
441 struct iphdr *iph;
442
443 /* non tcp/udp packets */
444 if (!cqe->header_length)
445 return -1;
446
447 /* non tcp packet */
448 skb_reset_network_header(skb);
449 iph = ip_hdr(skb);
450 if (iph->protocol != IPPROTO_TCP)
451 return -1;
452
453 ip_len = ip_hdrlen(skb);
454 skb_set_transport_header(skb, ip_len);
455 *tcph = tcp_hdr(skb);
456
457 /* check if ip header and tcp header are complete */
458 if (iph->tot_len < ip_len + tcp_hdrlen(skb))
459 return -1;
460
461 *hdr_flags = LRO_IPV4 | LRO_TCP;
462 *iphdr = iph;
463
464 return 0;
465 }
466
467 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
468 struct sk_buff *skb)
469 {
470 int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
471 && pr->port->vgrp;
472
473 if (use_lro) {
474 if (vlan_extracted)
475 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
476 pr->port->vgrp,
477 cqe->vlan_tag,
478 cqe);
479 else
480 lro_receive_skb(&pr->lro_mgr, skb, cqe);
481 } else {
482 if (vlan_extracted)
483 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
484 cqe->vlan_tag);
485 else
486 netif_receive_skb(skb);
487 }
488 }
489
490 static int ehea_proc_rwqes(struct net_device *dev,
491 struct ehea_port_res *pr,
492 int budget)
493 {
494 struct ehea_port *port = pr->port;
495 struct ehea_qp *qp = pr->qp;
496 struct ehea_cqe *cqe;
497 struct sk_buff *skb;
498 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
499 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
500 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
501 int skb_arr_rq1_len = pr->rq1_skba.len;
502 int skb_arr_rq2_len = pr->rq2_skba.len;
503 int skb_arr_rq3_len = pr->rq3_skba.len;
504 int processed, processed_rq1, processed_rq2, processed_rq3;
505 int wqe_index, last_wqe_index, rq, port_reset;
506
507 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
508 last_wqe_index = 0;
509
510 cqe = ehea_poll_rq1(qp, &wqe_index);
511 while ((processed < budget) && cqe) {
512 ehea_inc_rq1(qp);
513 processed_rq1++;
514 processed++;
515 if (netif_msg_rx_status(port))
516 ehea_dump(cqe, sizeof(*cqe), "CQE");
517
518 last_wqe_index = wqe_index;
519 rmb();
520 if (!ehea_check_cqe(cqe, &rq)) {
521 if (rq == 1) { /* LL RQ1 */
522 skb = get_skb_by_index_ll(skb_arr_rq1,
523 skb_arr_rq1_len,
524 wqe_index);
525 if (unlikely(!skb)) {
526 if (netif_msg_rx_err(port))
527 ehea_error("LL rq1: skb=NULL");
528
529 skb = netdev_alloc_skb(dev,
530 EHEA_L_PKT_SIZE);
531 if (!skb)
532 break;
533 }
534 skb_copy_to_linear_data(skb, ((char*)cqe) + 64,
535 cqe->num_bytes_transfered - 4);
536 ehea_fill_skb(dev, skb, cqe);
537 } else if (rq == 2) { /* RQ2 */
538 skb = get_skb_by_index(skb_arr_rq2,
539 skb_arr_rq2_len, cqe);
540 if (unlikely(!skb)) {
541 if (netif_msg_rx_err(port))
542 ehea_error("rq2: skb=NULL");
543 break;
544 }
545 ehea_fill_skb(dev, skb, cqe);
546 processed_rq2++;
547 } else { /* RQ3 */
548 skb = get_skb_by_index(skb_arr_rq3,
549 skb_arr_rq3_len, cqe);
550 if (unlikely(!skb)) {
551 if (netif_msg_rx_err(port))
552 ehea_error("rq3: skb=NULL");
553 break;
554 }
555 ehea_fill_skb(dev, skb, cqe);
556 processed_rq3++;
557 }
558
559 ehea_proc_skb(pr, cqe, skb);
560 dev->last_rx = jiffies;
561 } else {
562 pr->p_stats.poll_receive_errors++;
563 port_reset = ehea_treat_poll_error(pr, rq, cqe,
564 &processed_rq2,
565 &processed_rq3);
566 if (port_reset)
567 break;
568 }
569 cqe = ehea_poll_rq1(qp, &wqe_index);
570 }
571 if (use_lro)
572 lro_flush_all(&pr->lro_mgr);
573
574 pr->rx_packets += processed;
575
576 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
577 ehea_refill_rq2(pr, processed_rq2);
578 ehea_refill_rq3(pr, processed_rq3);
579
580 return processed;
581 }
582
583 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
584 {
585 struct sk_buff *skb;
586 struct ehea_cq *send_cq = pr->send_cq;
587 struct ehea_cqe *cqe;
588 int quota = my_quota;
589 int cqe_counter = 0;
590 int swqe_av = 0;
591 int index;
592 unsigned long flags;
593
594 cqe = ehea_poll_cq(send_cq);
595 while(cqe && (quota > 0)) {
596 ehea_inc_cq(send_cq);
597
598 cqe_counter++;
599 rmb();
600 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
601 ehea_error("Send Completion Error: Resetting port");
602 if (netif_msg_tx_err(pr->port))
603 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
604 schedule_work(&pr->port->reset_task);
605 break;
606 }
607
608 if (netif_msg_tx_done(pr->port))
609 ehea_dump(cqe, sizeof(*cqe), "CQE");
610
611 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
612 == EHEA_SWQE2_TYPE)) {
613
614 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
615 skb = pr->sq_skba.arr[index];
616 dev_kfree_skb(skb);
617 pr->sq_skba.arr[index] = NULL;
618 }
619
620 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
621 quota--;
622
623 cqe = ehea_poll_cq(send_cq);
624 };
625
626 ehea_update_feca(send_cq, cqe_counter);
627 atomic_add(swqe_av, &pr->swqe_avail);
628
629 spin_lock_irqsave(&pr->netif_queue, flags);
630
631 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
632 >= pr->swqe_refill_th)) {
633 netif_wake_queue(pr->port->netdev);
634 pr->queue_stopped = 0;
635 }
636 spin_unlock_irqrestore(&pr->netif_queue, flags);
637
638 return cqe;
639 }
640
641 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
642 #define EHEA_POLL_MAX_CQES 65535
643
644 static int ehea_poll(struct napi_struct *napi, int budget)
645 {
646 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, napi);
647 struct net_device *dev = pr->port->netdev;
648 struct ehea_cqe *cqe;
649 struct ehea_cqe *cqe_skb = NULL;
650 int force_irq, wqe_index;
651 int rx = 0;
652
653 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
654 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
655
656 if (!force_irq)
657 rx += ehea_proc_rwqes(dev, pr, budget - rx);
658
659 while ((rx != budget) || force_irq) {
660 pr->poll_counter = 0;
661 force_irq = 0;
662 netif_rx_complete(dev, napi);
663 ehea_reset_cq_ep(pr->recv_cq);
664 ehea_reset_cq_ep(pr->send_cq);
665 ehea_reset_cq_n1(pr->recv_cq);
666 ehea_reset_cq_n1(pr->send_cq);
667 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
668 cqe_skb = ehea_poll_cq(pr->send_cq);
669
670 if (!cqe && !cqe_skb)
671 return rx;
672
673 if (!netif_rx_reschedule(dev, napi))
674 return rx;
675
676 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
677 rx += ehea_proc_rwqes(dev, pr, budget - rx);
678 }
679
680 pr->poll_counter++;
681 return rx;
682 }
683
684 #ifdef CONFIG_NET_POLL_CONTROLLER
685 static void ehea_netpoll(struct net_device *dev)
686 {
687 struct ehea_port *port = netdev_priv(dev);
688 int i;
689
690 for (i = 0; i < port->num_def_qps; i++)
691 netif_rx_schedule(dev, &port->port_res[i].napi);
692 }
693 #endif
694
695 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
696 {
697 struct ehea_port_res *pr = param;
698
699 netif_rx_schedule(pr->port->netdev, &pr->napi);
700
701 return IRQ_HANDLED;
702 }
703
704 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
705 {
706 struct ehea_port *port = param;
707 struct ehea_eqe *eqe;
708 struct ehea_qp *qp;
709 u32 qp_token;
710
711 eqe = ehea_poll_eq(port->qp_eq);
712
713 while (eqe) {
714 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
715 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
716 eqe->entry, qp_token);
717
718 qp = port->port_res[qp_token].qp;
719 ehea_error_data(port->adapter, qp->fw_handle);
720 eqe = ehea_poll_eq(port->qp_eq);
721 }
722
723 schedule_work(&port->reset_task);
724
725 return IRQ_HANDLED;
726 }
727
728 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
729 int logical_port)
730 {
731 int i;
732
733 for (i = 0; i < EHEA_MAX_PORTS; i++)
734 if (adapter->port[i])
735 if (adapter->port[i]->logical_port_id == logical_port)
736 return adapter->port[i];
737 return NULL;
738 }
739
740 int ehea_sense_port_attr(struct ehea_port *port)
741 {
742 int ret;
743 u64 hret;
744 struct hcp_ehea_port_cb0 *cb0;
745
746 cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC); /* May be called via */
747 if (!cb0) { /* ehea_neq_tasklet() */
748 ehea_error("no mem for cb0");
749 ret = -ENOMEM;
750 goto out;
751 }
752
753 hret = ehea_h_query_ehea_port(port->adapter->handle,
754 port->logical_port_id, H_PORT_CB0,
755 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
756 cb0);
757 if (hret != H_SUCCESS) {
758 ret = -EIO;
759 goto out_free;
760 }
761
762 /* MAC address */
763 port->mac_addr = cb0->port_mac_addr << 16;
764
765 if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
766 ret = -EADDRNOTAVAIL;
767 goto out_free;
768 }
769
770 /* Port speed */
771 switch (cb0->port_speed) {
772 case H_SPEED_10M_H:
773 port->port_speed = EHEA_SPEED_10M;
774 port->full_duplex = 0;
775 break;
776 case H_SPEED_10M_F:
777 port->port_speed = EHEA_SPEED_10M;
778 port->full_duplex = 1;
779 break;
780 case H_SPEED_100M_H:
781 port->port_speed = EHEA_SPEED_100M;
782 port->full_duplex = 0;
783 break;
784 case H_SPEED_100M_F:
785 port->port_speed = EHEA_SPEED_100M;
786 port->full_duplex = 1;
787 break;
788 case H_SPEED_1G_F:
789 port->port_speed = EHEA_SPEED_1G;
790 port->full_duplex = 1;
791 break;
792 case H_SPEED_10G_F:
793 port->port_speed = EHEA_SPEED_10G;
794 port->full_duplex = 1;
795 break;
796 default:
797 port->port_speed = 0;
798 port->full_duplex = 0;
799 break;
800 }
801
802 port->autoneg = 1;
803 port->num_mcs = cb0->num_default_qps;
804
805 /* Number of default QPs */
806 if (use_mcs)
807 port->num_def_qps = cb0->num_default_qps;
808 else
809 port->num_def_qps = 1;
810
811 if (!port->num_def_qps) {
812 ret = -EINVAL;
813 goto out_free;
814 }
815
816 port->num_tx_qps = num_tx_qps;
817
818 if (port->num_def_qps >= port->num_tx_qps)
819 port->num_add_tx_qps = 0;
820 else
821 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
822
823 ret = 0;
824 out_free:
825 if (ret || netif_msg_probe(port))
826 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
827 kfree(cb0);
828 out:
829 return ret;
830 }
831
832 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
833 {
834 struct hcp_ehea_port_cb4 *cb4;
835 u64 hret;
836 int ret = 0;
837
838 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
839 if (!cb4) {
840 ehea_error("no mem for cb4");
841 ret = -ENOMEM;
842 goto out;
843 }
844
845 cb4->port_speed = port_speed;
846
847 netif_carrier_off(port->netdev);
848
849 hret = ehea_h_modify_ehea_port(port->adapter->handle,
850 port->logical_port_id,
851 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
852 if (hret == H_SUCCESS) {
853 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
854
855 hret = ehea_h_query_ehea_port(port->adapter->handle,
856 port->logical_port_id,
857 H_PORT_CB4, H_PORT_CB4_SPEED,
858 cb4);
859 if (hret == H_SUCCESS) {
860 switch (cb4->port_speed) {
861 case H_SPEED_10M_H:
862 port->port_speed = EHEA_SPEED_10M;
863 port->full_duplex = 0;
864 break;
865 case H_SPEED_10M_F:
866 port->port_speed = EHEA_SPEED_10M;
867 port->full_duplex = 1;
868 break;
869 case H_SPEED_100M_H:
870 port->port_speed = EHEA_SPEED_100M;
871 port->full_duplex = 0;
872 break;
873 case H_SPEED_100M_F:
874 port->port_speed = EHEA_SPEED_100M;
875 port->full_duplex = 1;
876 break;
877 case H_SPEED_1G_F:
878 port->port_speed = EHEA_SPEED_1G;
879 port->full_duplex = 1;
880 break;
881 case H_SPEED_10G_F:
882 port->port_speed = EHEA_SPEED_10G;
883 port->full_duplex = 1;
884 break;
885 default:
886 port->port_speed = 0;
887 port->full_duplex = 0;
888 break;
889 }
890 } else {
891 ehea_error("Failed sensing port speed");
892 ret = -EIO;
893 }
894 } else {
895 if (hret == H_AUTHORITY) {
896 ehea_info("Hypervisor denied setting port speed");
897 ret = -EPERM;
898 } else {
899 ret = -EIO;
900 ehea_error("Failed setting port speed");
901 }
902 }
903 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
904 netif_carrier_on(port->netdev);
905
906 kfree(cb4);
907 out:
908 return ret;
909 }
910
911 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
912 {
913 int ret;
914 u8 ec;
915 u8 portnum;
916 struct ehea_port *port;
917
918 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
919 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
920 port = ehea_get_port(adapter, portnum);
921
922 switch (ec) {
923 case EHEA_EC_PORTSTATE_CHG: /* port state change */
924
925 if (!port) {
926 ehea_error("unknown portnum %x", portnum);
927 break;
928 }
929
930 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
931 if (!netif_carrier_ok(port->netdev)) {
932 ret = ehea_sense_port_attr(port);
933 if (ret) {
934 ehea_error("failed resensing port "
935 "attributes");
936 break;
937 }
938
939 if (netif_msg_link(port))
940 ehea_info("%s: Logical port up: %dMbps "
941 "%s Duplex",
942 port->netdev->name,
943 port->port_speed,
944 port->full_duplex ==
945 1 ? "Full" : "Half");
946
947 netif_carrier_on(port->netdev);
948 netif_wake_queue(port->netdev);
949 }
950 } else
951 if (netif_carrier_ok(port->netdev)) {
952 if (netif_msg_link(port))
953 ehea_info("%s: Logical port down",
954 port->netdev->name);
955 netif_carrier_off(port->netdev);
956 netif_stop_queue(port->netdev);
957 }
958
959 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
960 port->phy_link = EHEA_PHY_LINK_UP;
961 if (netif_msg_link(port))
962 ehea_info("%s: Physical port up",
963 port->netdev->name);
964 if (prop_carrier_state)
965 netif_carrier_on(port->netdev);
966 } else {
967 port->phy_link = EHEA_PHY_LINK_DOWN;
968 if (netif_msg_link(port))
969 ehea_info("%s: Physical port down",
970 port->netdev->name);
971 if (prop_carrier_state)
972 netif_carrier_off(port->netdev);
973 }
974
975 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
976 ehea_info("External switch port is primary port");
977 else
978 ehea_info("External switch port is backup port");
979
980 break;
981 case EHEA_EC_ADAPTER_MALFUNC:
982 ehea_error("Adapter malfunction");
983 break;
984 case EHEA_EC_PORT_MALFUNC:
985 ehea_info("Port malfunction: Device: %s", port->netdev->name);
986 netif_carrier_off(port->netdev);
987 netif_stop_queue(port->netdev);
988 break;
989 default:
990 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
991 break;
992 }
993 }
994
995 static void ehea_neq_tasklet(unsigned long data)
996 {
997 struct ehea_adapter *adapter = (struct ehea_adapter*)data;
998 struct ehea_eqe *eqe;
999 u64 event_mask;
1000
1001 eqe = ehea_poll_eq(adapter->neq);
1002 ehea_debug("eqe=%p", eqe);
1003
1004 while (eqe) {
1005 ehea_debug("*eqe=%lx", eqe->entry);
1006 ehea_parse_eqe(adapter, eqe->entry);
1007 eqe = ehea_poll_eq(adapter->neq);
1008 ehea_debug("next eqe=%p", eqe);
1009 }
1010
1011 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1012 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1013 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1014
1015 ehea_h_reset_events(adapter->handle,
1016 adapter->neq->fw_handle, event_mask);
1017 }
1018
1019 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1020 {
1021 struct ehea_adapter *adapter = param;
1022 tasklet_hi_schedule(&adapter->neq_tasklet);
1023 return IRQ_HANDLED;
1024 }
1025
1026
1027 static int ehea_fill_port_res(struct ehea_port_res *pr)
1028 {
1029 int ret;
1030 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1031
1032 ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1033 - init_attr->act_nr_rwqes_rq2
1034 - init_attr->act_nr_rwqes_rq3 - 1);
1035
1036 ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1037
1038 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1039
1040 return ret;
1041 }
1042
1043 static int ehea_reg_interrupts(struct net_device *dev)
1044 {
1045 struct ehea_port *port = netdev_priv(dev);
1046 struct ehea_port_res *pr;
1047 int i, ret;
1048
1049
1050 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1051 dev->name);
1052
1053 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1054 ehea_qp_aff_irq_handler,
1055 IRQF_DISABLED, port->int_aff_name, port);
1056 if (ret) {
1057 ehea_error("failed registering irq for qp_aff_irq_handler:"
1058 "ist=%X", port->qp_eq->attr.ist1);
1059 goto out_free_qpeq;
1060 }
1061
1062 if (netif_msg_ifup(port))
1063 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1064 "registered", port->qp_eq->attr.ist1);
1065
1066
1067 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1068 pr = &port->port_res[i];
1069 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1070 "%s-queue%d", dev->name, i);
1071 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1072 ehea_recv_irq_handler,
1073 IRQF_DISABLED, pr->int_send_name,
1074 pr);
1075 if (ret) {
1076 ehea_error("failed registering irq for ehea_queue "
1077 "port_res_nr:%d, ist=%X", i,
1078 pr->eq->attr.ist1);
1079 goto out_free_req;
1080 }
1081 if (netif_msg_ifup(port))
1082 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1083 "%d registered", pr->eq->attr.ist1, i);
1084 }
1085 out:
1086 return ret;
1087
1088
1089 out_free_req:
1090 while (--i >= 0) {
1091 u32 ist = port->port_res[i].eq->attr.ist1;
1092 ibmebus_free_irq(ist, &port->port_res[i]);
1093 }
1094
1095 out_free_qpeq:
1096 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1097 i = port->num_def_qps;
1098
1099 goto out;
1100
1101 }
1102
1103 static void ehea_free_interrupts(struct net_device *dev)
1104 {
1105 struct ehea_port *port = netdev_priv(dev);
1106 struct ehea_port_res *pr;
1107 int i;
1108
1109 /* send */
1110
1111 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1112 pr = &port->port_res[i];
1113 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1114 if (netif_msg_intr(port))
1115 ehea_info("free send irq for res %d with handle 0x%X",
1116 i, pr->eq->attr.ist1);
1117 }
1118
1119 /* associated events */
1120 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1121 if (netif_msg_intr(port))
1122 ehea_info("associated event interrupt for handle 0x%X freed",
1123 port->qp_eq->attr.ist1);
1124 }
1125
1126 static int ehea_configure_port(struct ehea_port *port)
1127 {
1128 int ret, i;
1129 u64 hret, mask;
1130 struct hcp_ehea_port_cb0 *cb0;
1131
1132 ret = -ENOMEM;
1133 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1134 if (!cb0)
1135 goto out;
1136
1137 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1138 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1139 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1140 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1141 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1142 PXLY_RC_VLAN_FILTER)
1143 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1144
1145 for (i = 0; i < port->num_mcs; i++)
1146 if (use_mcs)
1147 cb0->default_qpn_arr[i] =
1148 port->port_res[i].qp->init_attr.qp_nr;
1149 else
1150 cb0->default_qpn_arr[i] =
1151 port->port_res[0].qp->init_attr.qp_nr;
1152
1153 if (netif_msg_ifup(port))
1154 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1155
1156 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1157 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1158
1159 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1160 port->logical_port_id,
1161 H_PORT_CB0, mask, cb0);
1162 ret = -EIO;
1163 if (hret != H_SUCCESS)
1164 goto out_free;
1165
1166 ret = 0;
1167
1168 out_free:
1169 kfree(cb0);
1170 out:
1171 return ret;
1172 }
1173
1174 int ehea_gen_smrs(struct ehea_port_res *pr)
1175 {
1176 int ret;
1177 struct ehea_adapter *adapter = pr->port->adapter;
1178
1179 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1180 if (ret)
1181 goto out;
1182
1183 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1184 if (ret)
1185 goto out_free;
1186
1187 return 0;
1188
1189 out_free:
1190 ehea_rem_mr(&pr->send_mr);
1191 out:
1192 ehea_error("Generating SMRS failed\n");
1193 return -EIO;
1194 }
1195
1196 int ehea_rem_smrs(struct ehea_port_res *pr)
1197 {
1198 if ((ehea_rem_mr(&pr->send_mr))
1199 || (ehea_rem_mr(&pr->recv_mr)))
1200 return -EIO;
1201 else
1202 return 0;
1203 }
1204
1205 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1206 {
1207 int arr_size = sizeof(void*) * max_q_entries;
1208
1209 q_skba->arr = vmalloc(arr_size);
1210 if (!q_skba->arr)
1211 return -ENOMEM;
1212
1213 memset(q_skba->arr, 0, arr_size);
1214
1215 q_skba->len = max_q_entries;
1216 q_skba->index = 0;
1217 q_skba->os_skbs = 0;
1218
1219 return 0;
1220 }
1221
1222 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1223 struct port_res_cfg *pr_cfg, int queue_token)
1224 {
1225 struct ehea_adapter *adapter = port->adapter;
1226 enum ehea_eq_type eq_type = EHEA_EQ;
1227 struct ehea_qp_init_attr *init_attr = NULL;
1228 int ret = -EIO;
1229
1230 memset(pr, 0, sizeof(struct ehea_port_res));
1231
1232 pr->port = port;
1233 spin_lock_init(&pr->xmit_lock);
1234 spin_lock_init(&pr->netif_queue);
1235
1236 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1237 if (!pr->eq) {
1238 ehea_error("create_eq failed (eq)");
1239 goto out_free;
1240 }
1241
1242 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1243 pr->eq->fw_handle,
1244 port->logical_port_id);
1245 if (!pr->recv_cq) {
1246 ehea_error("create_cq failed (cq_recv)");
1247 goto out_free;
1248 }
1249
1250 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1251 pr->eq->fw_handle,
1252 port->logical_port_id);
1253 if (!pr->send_cq) {
1254 ehea_error("create_cq failed (cq_send)");
1255 goto out_free;
1256 }
1257
1258 if (netif_msg_ifup(port))
1259 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1260 pr->send_cq->attr.act_nr_of_cqes,
1261 pr->recv_cq->attr.act_nr_of_cqes);
1262
1263 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1264 if (!init_attr) {
1265 ret = -ENOMEM;
1266 ehea_error("no mem for ehea_qp_init_attr");
1267 goto out_free;
1268 }
1269
1270 init_attr->low_lat_rq1 = 1;
1271 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1272 init_attr->rq_count = 3;
1273 init_attr->qp_token = queue_token;
1274 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1275 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1276 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1277 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1278 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1279 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1280 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1281 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1282 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1283 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1284 init_attr->port_nr = port->logical_port_id;
1285 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1286 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1287 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1288
1289 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1290 if (!pr->qp) {
1291 ehea_error("create_qp failed");
1292 ret = -EIO;
1293 goto out_free;
1294 }
1295
1296 if (netif_msg_ifup(port))
1297 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1298 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1299 init_attr->act_nr_send_wqes,
1300 init_attr->act_nr_rwqes_rq1,
1301 init_attr->act_nr_rwqes_rq2,
1302 init_attr->act_nr_rwqes_rq3);
1303
1304 ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1305 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1306 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1307 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1308 if (ret)
1309 goto out_free;
1310
1311 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1312 if (ehea_gen_smrs(pr) != 0) {
1313 ret = -EIO;
1314 goto out_free;
1315 }
1316
1317 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1318
1319 kfree(init_attr);
1320
1321 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1322
1323 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1324 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1325 pr->lro_mgr.lro_arr = pr->lro_desc;
1326 pr->lro_mgr.get_skb_header = get_skb_hdr;
1327 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1328 pr->lro_mgr.dev = port->netdev;
1329 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1330 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1331
1332 ret = 0;
1333 goto out;
1334
1335 out_free:
1336 kfree(init_attr);
1337 vfree(pr->sq_skba.arr);
1338 vfree(pr->rq1_skba.arr);
1339 vfree(pr->rq2_skba.arr);
1340 vfree(pr->rq3_skba.arr);
1341 ehea_destroy_qp(pr->qp);
1342 ehea_destroy_cq(pr->send_cq);
1343 ehea_destroy_cq(pr->recv_cq);
1344 ehea_destroy_eq(pr->eq);
1345 out:
1346 return ret;
1347 }
1348
1349 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1350 {
1351 int ret, i;
1352
1353 ret = ehea_destroy_qp(pr->qp);
1354
1355 if (!ret) {
1356 ehea_destroy_cq(pr->send_cq);
1357 ehea_destroy_cq(pr->recv_cq);
1358 ehea_destroy_eq(pr->eq);
1359
1360 for (i = 0; i < pr->rq1_skba.len; i++)
1361 if (pr->rq1_skba.arr[i])
1362 dev_kfree_skb(pr->rq1_skba.arr[i]);
1363
1364 for (i = 0; i < pr->rq2_skba.len; i++)
1365 if (pr->rq2_skba.arr[i])
1366 dev_kfree_skb(pr->rq2_skba.arr[i]);
1367
1368 for (i = 0; i < pr->rq3_skba.len; i++)
1369 if (pr->rq3_skba.arr[i])
1370 dev_kfree_skb(pr->rq3_skba.arr[i]);
1371
1372 for (i = 0; i < pr->sq_skba.len; i++)
1373 if (pr->sq_skba.arr[i])
1374 dev_kfree_skb(pr->sq_skba.arr[i]);
1375
1376 vfree(pr->rq1_skba.arr);
1377 vfree(pr->rq2_skba.arr);
1378 vfree(pr->rq3_skba.arr);
1379 vfree(pr->sq_skba.arr);
1380 ret = ehea_rem_smrs(pr);
1381 }
1382 return ret;
1383 }
1384
1385 /*
1386 * The write_* functions store information in swqe which is used by
1387 * the hardware to calculate the ip/tcp/udp checksum
1388 */
1389
1390 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1391 const struct sk_buff *skb)
1392 {
1393 swqe->ip_start = skb_network_offset(skb);
1394 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1395 }
1396
1397 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1398 const struct sk_buff *skb)
1399 {
1400 swqe->tcp_offset =
1401 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1402
1403 swqe->tcp_end = (u16)skb->len - 1;
1404 }
1405
1406 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1407 const struct sk_buff *skb)
1408 {
1409 swqe->tcp_offset =
1410 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1411
1412 swqe->tcp_end = (u16)skb->len - 1;
1413 }
1414
1415
1416 static void write_swqe2_TSO(struct sk_buff *skb,
1417 struct ehea_swqe *swqe, u32 lkey)
1418 {
1419 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1420 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1421 int skb_data_size = skb->len - skb->data_len;
1422 int headersize;
1423
1424 /* Packet is TCP with TSO enabled */
1425 swqe->tx_control |= EHEA_SWQE_TSO;
1426 swqe->mss = skb_shinfo(skb)->gso_size;
1427 /* copy only eth/ip/tcp headers to immediate data and
1428 * the rest of skb->data to sg1entry
1429 */
1430 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1431
1432 skb_data_size = skb->len - skb->data_len;
1433
1434 if (skb_data_size >= headersize) {
1435 /* copy immediate data */
1436 skb_copy_from_linear_data(skb, imm_data, headersize);
1437 swqe->immediate_data_length = headersize;
1438
1439 if (skb_data_size > headersize) {
1440 /* set sg1entry data */
1441 sg1entry->l_key = lkey;
1442 sg1entry->len = skb_data_size - headersize;
1443 sg1entry->vaddr =
1444 ehea_map_vaddr(skb->data + headersize);
1445 swqe->descriptors++;
1446 }
1447 } else
1448 ehea_error("cannot handle fragmented headers");
1449 }
1450
1451 static void write_swqe2_nonTSO(struct sk_buff *skb,
1452 struct ehea_swqe *swqe, u32 lkey)
1453 {
1454 int skb_data_size = skb->len - skb->data_len;
1455 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1456 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1457
1458 /* Packet is any nonTSO type
1459 *
1460 * Copy as much as possible skb->data to immediate data and
1461 * the rest to sg1entry
1462 */
1463 if (skb_data_size >= SWQE2_MAX_IMM) {
1464 /* copy immediate data */
1465 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1466
1467 swqe->immediate_data_length = SWQE2_MAX_IMM;
1468
1469 if (skb_data_size > SWQE2_MAX_IMM) {
1470 /* copy sg1entry data */
1471 sg1entry->l_key = lkey;
1472 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1473 sg1entry->vaddr =
1474 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1475 swqe->descriptors++;
1476 }
1477 } else {
1478 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1479 swqe->immediate_data_length = skb_data_size;
1480 }
1481 }
1482
1483 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1484 struct ehea_swqe *swqe, u32 lkey)
1485 {
1486 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1487 skb_frag_t *frag;
1488 int nfrags, sg1entry_contains_frag_data, i;
1489
1490 nfrags = skb_shinfo(skb)->nr_frags;
1491 sg1entry = &swqe->u.immdata_desc.sg_entry;
1492 sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1493 swqe->descriptors = 0;
1494 sg1entry_contains_frag_data = 0;
1495
1496 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1497 write_swqe2_TSO(skb, swqe, lkey);
1498 else
1499 write_swqe2_nonTSO(skb, swqe, lkey);
1500
1501 /* write descriptors */
1502 if (nfrags > 0) {
1503 if (swqe->descriptors == 0) {
1504 /* sg1entry not yet used */
1505 frag = &skb_shinfo(skb)->frags[0];
1506
1507 /* copy sg1entry data */
1508 sg1entry->l_key = lkey;
1509 sg1entry->len = frag->size;
1510 sg1entry->vaddr =
1511 ehea_map_vaddr(page_address(frag->page)
1512 + frag->page_offset);
1513 swqe->descriptors++;
1514 sg1entry_contains_frag_data = 1;
1515 }
1516
1517 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1518
1519 frag = &skb_shinfo(skb)->frags[i];
1520 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1521
1522 sgentry->l_key = lkey;
1523 sgentry->len = frag->size;
1524 sgentry->vaddr =
1525 ehea_map_vaddr(page_address(frag->page)
1526 + frag->page_offset);
1527 swqe->descriptors++;
1528 }
1529 }
1530 }
1531
1532 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1533 {
1534 int ret = 0;
1535 u64 hret;
1536 u8 reg_type;
1537
1538 /* De/Register untagged packets */
1539 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1540 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1541 port->logical_port_id,
1542 reg_type, port->mac_addr, 0, hcallid);
1543 if (hret != H_SUCCESS) {
1544 ehea_error("%sregistering bc address failed (tagged)",
1545 hcallid == H_REG_BCMC ? "" : "de");
1546 ret = -EIO;
1547 goto out_herr;
1548 }
1549
1550 /* De/Register VLAN packets */
1551 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1552 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1553 port->logical_port_id,
1554 reg_type, port->mac_addr, 0, hcallid);
1555 if (hret != H_SUCCESS) {
1556 ehea_error("%sregistering bc address failed (vlan)",
1557 hcallid == H_REG_BCMC ? "" : "de");
1558 ret = -EIO;
1559 }
1560 out_herr:
1561 return ret;
1562 }
1563
1564 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1565 {
1566 struct ehea_port *port = netdev_priv(dev);
1567 struct sockaddr *mac_addr = sa;
1568 struct hcp_ehea_port_cb0 *cb0;
1569 int ret;
1570 u64 hret;
1571
1572 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1573 ret = -EADDRNOTAVAIL;
1574 goto out;
1575 }
1576
1577 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1578 if (!cb0) {
1579 ehea_error("no mem for cb0");
1580 ret = -ENOMEM;
1581 goto out;
1582 }
1583
1584 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1585
1586 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1587
1588 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1589 port->logical_port_id, H_PORT_CB0,
1590 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1591 if (hret != H_SUCCESS) {
1592 ret = -EIO;
1593 goto out_free;
1594 }
1595
1596 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1597
1598 /* Deregister old MAC in pHYP */
1599 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1600 if (ret)
1601 goto out_free;
1602
1603 port->mac_addr = cb0->port_mac_addr << 16;
1604
1605 /* Register new MAC in pHYP */
1606 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1607 if (ret)
1608 goto out_free;
1609
1610 ret = 0;
1611 out_free:
1612 kfree(cb0);
1613 out:
1614 return ret;
1615 }
1616
1617 static void ehea_promiscuous_error(u64 hret, int enable)
1618 {
1619 if (hret == H_AUTHORITY)
1620 ehea_info("Hypervisor denied %sabling promiscuous mode",
1621 enable == 1 ? "en" : "dis");
1622 else
1623 ehea_error("failed %sabling promiscuous mode",
1624 enable == 1 ? "en" : "dis");
1625 }
1626
1627 static void ehea_promiscuous(struct net_device *dev, int enable)
1628 {
1629 struct ehea_port *port = netdev_priv(dev);
1630 struct hcp_ehea_port_cb7 *cb7;
1631 u64 hret;
1632
1633 if ((enable && port->promisc) || (!enable && !port->promisc))
1634 return;
1635
1636 cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1637 if (!cb7) {
1638 ehea_error("no mem for cb7");
1639 goto out;
1640 }
1641
1642 /* Modify Pxs_DUCQPN in CB7 */
1643 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1644
1645 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1646 port->logical_port_id,
1647 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1648 if (hret) {
1649 ehea_promiscuous_error(hret, enable);
1650 goto out;
1651 }
1652
1653 port->promisc = enable;
1654 out:
1655 kfree(cb7);
1656 return;
1657 }
1658
1659 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1660 u32 hcallid)
1661 {
1662 u64 hret;
1663 u8 reg_type;
1664
1665 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1666 | EHEA_BCMC_UNTAGGED;
1667
1668 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1669 port->logical_port_id,
1670 reg_type, mc_mac_addr, 0, hcallid);
1671 if (hret)
1672 goto out;
1673
1674 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1675 | EHEA_BCMC_VLANID_ALL;
1676
1677 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1678 port->logical_port_id,
1679 reg_type, mc_mac_addr, 0, hcallid);
1680 out:
1681 return hret;
1682 }
1683
1684 static int ehea_drop_multicast_list(struct net_device *dev)
1685 {
1686 struct ehea_port *port = netdev_priv(dev);
1687 struct ehea_mc_list *mc_entry = port->mc_list;
1688 struct list_head *pos;
1689 struct list_head *temp;
1690 int ret = 0;
1691 u64 hret;
1692
1693 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1694 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1695
1696 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1697 H_DEREG_BCMC);
1698 if (hret) {
1699 ehea_error("failed deregistering mcast MAC");
1700 ret = -EIO;
1701 }
1702
1703 list_del(pos);
1704 kfree(mc_entry);
1705 }
1706 return ret;
1707 }
1708
1709 static void ehea_allmulti(struct net_device *dev, int enable)
1710 {
1711 struct ehea_port *port = netdev_priv(dev);
1712 u64 hret;
1713
1714 if (!port->allmulti) {
1715 if (enable) {
1716 /* Enable ALLMULTI */
1717 ehea_drop_multicast_list(dev);
1718 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1719 if (!hret)
1720 port->allmulti = 1;
1721 else
1722 ehea_error("failed enabling IFF_ALLMULTI");
1723 }
1724 } else
1725 if (!enable) {
1726 /* Disable ALLMULTI */
1727 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1728 if (!hret)
1729 port->allmulti = 0;
1730 else
1731 ehea_error("failed disabling IFF_ALLMULTI");
1732 }
1733 }
1734
1735 static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
1736 {
1737 struct ehea_mc_list *ehea_mcl_entry;
1738 u64 hret;
1739
1740 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1741 if (!ehea_mcl_entry) {
1742 ehea_error("no mem for mcl_entry");
1743 return;
1744 }
1745
1746 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1747
1748 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1749
1750 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1751 H_REG_BCMC);
1752 if (!hret)
1753 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1754 else {
1755 ehea_error("failed registering mcast MAC");
1756 kfree(ehea_mcl_entry);
1757 }
1758 }
1759
1760 static void ehea_set_multicast_list(struct net_device *dev)
1761 {
1762 struct ehea_port *port = netdev_priv(dev);
1763 struct dev_mc_list *k_mcl_entry;
1764 int ret, i;
1765
1766 if (dev->flags & IFF_PROMISC) {
1767 ehea_promiscuous(dev, 1);
1768 return;
1769 }
1770 ehea_promiscuous(dev, 0);
1771
1772 if (dev->flags & IFF_ALLMULTI) {
1773 ehea_allmulti(dev, 1);
1774 return;
1775 }
1776 ehea_allmulti(dev, 0);
1777
1778 if (dev->mc_count) {
1779 ret = ehea_drop_multicast_list(dev);
1780 if (ret) {
1781 /* Dropping the current multicast list failed.
1782 * Enabling ALL_MULTI is the best we can do.
1783 */
1784 ehea_allmulti(dev, 1);
1785 }
1786
1787 if (dev->mc_count > port->adapter->max_mc_mac) {
1788 ehea_info("Mcast registration limit reached (0x%lx). "
1789 "Use ALLMULTI!",
1790 port->adapter->max_mc_mac);
1791 goto out;
1792 }
1793
1794 for (i = 0, k_mcl_entry = dev->mc_list;
1795 i < dev->mc_count;
1796 i++, k_mcl_entry = k_mcl_entry->next) {
1797 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1798 }
1799 }
1800 out:
1801 return;
1802 }
1803
1804 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1805 {
1806 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1807 return -EINVAL;
1808 dev->mtu = new_mtu;
1809 return 0;
1810 }
1811
1812 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1813 struct ehea_swqe *swqe, u32 lkey)
1814 {
1815 if (skb->protocol == htons(ETH_P_IP)) {
1816 const struct iphdr *iph = ip_hdr(skb);
1817
1818 /* IPv4 */
1819 swqe->tx_control |= EHEA_SWQE_CRC
1820 | EHEA_SWQE_IP_CHECKSUM
1821 | EHEA_SWQE_TCP_CHECKSUM
1822 | EHEA_SWQE_IMM_DATA_PRESENT
1823 | EHEA_SWQE_DESCRIPTORS_PRESENT;
1824
1825 write_ip_start_end(swqe, skb);
1826
1827 if (iph->protocol == IPPROTO_UDP) {
1828 if ((iph->frag_off & IP_MF)
1829 || (iph->frag_off & IP_OFFSET))
1830 /* IP fragment, so don't change cs */
1831 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
1832 else
1833 write_udp_offset_end(swqe, skb);
1834 } else if (iph->protocol == IPPROTO_TCP) {
1835 write_tcp_offset_end(swqe, skb);
1836 }
1837
1838 /* icmp (big data) and ip segmentation packets (all other ip
1839 packets) do not require any special handling */
1840
1841 } else {
1842 /* Other Ethernet Protocol */
1843 swqe->tx_control |= EHEA_SWQE_CRC
1844 | EHEA_SWQE_IMM_DATA_PRESENT
1845 | EHEA_SWQE_DESCRIPTORS_PRESENT;
1846 }
1847
1848 write_swqe2_data(skb, dev, swqe, lkey);
1849 }
1850
1851 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1852 struct ehea_swqe *swqe)
1853 {
1854 int nfrags = skb_shinfo(skb)->nr_frags;
1855 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1856 skb_frag_t *frag;
1857 int i;
1858
1859 if (skb->protocol == htons(ETH_P_IP)) {
1860 const struct iphdr *iph = ip_hdr(skb);
1861
1862 /* IPv4 */
1863 write_ip_start_end(swqe, skb);
1864
1865 if (iph->protocol == IPPROTO_TCP) {
1866 swqe->tx_control |= EHEA_SWQE_CRC
1867 | EHEA_SWQE_IP_CHECKSUM
1868 | EHEA_SWQE_TCP_CHECKSUM
1869 | EHEA_SWQE_IMM_DATA_PRESENT;
1870
1871 write_tcp_offset_end(swqe, skb);
1872
1873 } else if (iph->protocol == IPPROTO_UDP) {
1874 if ((iph->frag_off & IP_MF)
1875 || (iph->frag_off & IP_OFFSET))
1876 /* IP fragment, so don't change cs */
1877 swqe->tx_control |= EHEA_SWQE_CRC
1878 | EHEA_SWQE_IMM_DATA_PRESENT;
1879 else {
1880 swqe->tx_control |= EHEA_SWQE_CRC
1881 | EHEA_SWQE_IP_CHECKSUM
1882 | EHEA_SWQE_TCP_CHECKSUM
1883 | EHEA_SWQE_IMM_DATA_PRESENT;
1884
1885 write_udp_offset_end(swqe, skb);
1886 }
1887 } else {
1888 /* icmp (big data) and
1889 ip segmentation packets (all other ip packets) */
1890 swqe->tx_control |= EHEA_SWQE_CRC
1891 | EHEA_SWQE_IP_CHECKSUM
1892 | EHEA_SWQE_IMM_DATA_PRESENT;
1893 }
1894 } else {
1895 /* Other Ethernet Protocol */
1896 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
1897 }
1898 /* copy (immediate) data */
1899 if (nfrags == 0) {
1900 /* data is in a single piece */
1901 skb_copy_from_linear_data(skb, imm_data, skb->len);
1902 } else {
1903 /* first copy data from the skb->data buffer ... */
1904 skb_copy_from_linear_data(skb, imm_data,
1905 skb->len - skb->data_len);
1906 imm_data += skb->len - skb->data_len;
1907
1908 /* ... then copy data from the fragments */
1909 for (i = 0; i < nfrags; i++) {
1910 frag = &skb_shinfo(skb)->frags[i];
1911 memcpy(imm_data,
1912 page_address(frag->page) + frag->page_offset,
1913 frag->size);
1914 imm_data += frag->size;
1915 }
1916 }
1917 swqe->immediate_data_length = skb->len;
1918 dev_kfree_skb(skb);
1919 }
1920
1921 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
1922 {
1923 struct tcphdr *tcp;
1924 u32 tmp;
1925
1926 if ((skb->protocol == htons(ETH_P_IP)) &&
1927 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
1928 tcp = (struct tcphdr*)(skb_network_header(skb) + (ip_hdr(skb)->ihl * 4));
1929 tmp = (tcp->source + (tcp->dest << 16)) % 31;
1930 tmp += ip_hdr(skb)->daddr % 31;
1931 return tmp % num_qps;
1932 }
1933 else
1934 return 0;
1935 }
1936
1937 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
1938 {
1939 struct ehea_port *port = netdev_priv(dev);
1940 struct ehea_swqe *swqe;
1941 unsigned long flags;
1942 u32 lkey;
1943 int swqe_index;
1944 struct ehea_port_res *pr;
1945
1946 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
1947
1948 if (!spin_trylock(&pr->xmit_lock))
1949 return NETDEV_TX_BUSY;
1950
1951 if (pr->queue_stopped) {
1952 spin_unlock(&pr->xmit_lock);
1953 return NETDEV_TX_BUSY;
1954 }
1955
1956 swqe = ehea_get_swqe(pr->qp, &swqe_index);
1957 memset(swqe, 0, SWQE_HEADER_SIZE);
1958 atomic_dec(&pr->swqe_avail);
1959
1960 if (skb->len <= SWQE3_MAX_IMM) {
1961 u32 sig_iv = port->sig_comp_iv;
1962 u32 swqe_num = pr->swqe_id_counter;
1963 ehea_xmit3(skb, dev, swqe);
1964 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
1965 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
1966 if (pr->swqe_ll_count >= (sig_iv - 1)) {
1967 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1968 sig_iv);
1969 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1970 pr->swqe_ll_count = 0;
1971 } else
1972 pr->swqe_ll_count += 1;
1973 } else {
1974 swqe->wr_id =
1975 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
1976 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
1977 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
1978 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
1979 pr->sq_skba.arr[pr->sq_skba.index] = skb;
1980
1981 pr->sq_skba.index++;
1982 pr->sq_skba.index &= (pr->sq_skba.len - 1);
1983
1984 lkey = pr->send_mr.lkey;
1985 ehea_xmit2(skb, dev, swqe, lkey);
1986 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1987 }
1988 pr->swqe_id_counter += 1;
1989
1990 if (port->vgrp && vlan_tx_tag_present(skb)) {
1991 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
1992 swqe->vlan_tag = vlan_tx_tag_get(skb);
1993 }
1994
1995 if (netif_msg_tx_queued(port)) {
1996 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
1997 ehea_dump(swqe, 512, "swqe");
1998 }
1999
2000 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2001 netif_stop_queue(dev);
2002 swqe->tx_control |= EHEA_SWQE_PURGE;
2003 }
2004
2005 ehea_post_swqe(pr->qp, swqe);
2006 pr->tx_packets++;
2007
2008 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2009 spin_lock_irqsave(&pr->netif_queue, flags);
2010 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2011 pr->p_stats.queue_stopped++;
2012 netif_stop_queue(dev);
2013 pr->queue_stopped = 1;
2014 }
2015 spin_unlock_irqrestore(&pr->netif_queue, flags);
2016 }
2017 dev->trans_start = jiffies;
2018 spin_unlock(&pr->xmit_lock);
2019
2020 return NETDEV_TX_OK;
2021 }
2022
2023 static void ehea_vlan_rx_register(struct net_device *dev,
2024 struct vlan_group *grp)
2025 {
2026 struct ehea_port *port = netdev_priv(dev);
2027 struct ehea_adapter *adapter = port->adapter;
2028 struct hcp_ehea_port_cb1 *cb1;
2029 u64 hret;
2030
2031 port->vgrp = grp;
2032
2033 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2034 if (!cb1) {
2035 ehea_error("no mem for cb1");
2036 goto out;
2037 }
2038
2039 memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
2040
2041 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2042 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2043 if (hret != H_SUCCESS)
2044 ehea_error("modify_ehea_port failed");
2045
2046 kfree(cb1);
2047 out:
2048 return;
2049 }
2050
2051 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2052 {
2053 struct ehea_port *port = netdev_priv(dev);
2054 struct ehea_adapter *adapter = port->adapter;
2055 struct hcp_ehea_port_cb1 *cb1;
2056 int index;
2057 u64 hret;
2058
2059 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2060 if (!cb1) {
2061 ehea_error("no mem for cb1");
2062 goto out;
2063 }
2064
2065 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2066 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2067 if (hret != H_SUCCESS) {
2068 ehea_error("query_ehea_port failed");
2069 goto out;
2070 }
2071
2072 index = (vid / 64);
2073 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2074
2075 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2076 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2077 if (hret != H_SUCCESS)
2078 ehea_error("modify_ehea_port failed");
2079 out:
2080 kfree(cb1);
2081 return;
2082 }
2083
2084 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2085 {
2086 struct ehea_port *port = netdev_priv(dev);
2087 struct ehea_adapter *adapter = port->adapter;
2088 struct hcp_ehea_port_cb1 *cb1;
2089 int index;
2090 u64 hret;
2091
2092 vlan_group_set_device(port->vgrp, vid, NULL);
2093
2094 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2095 if (!cb1) {
2096 ehea_error("no mem for cb1");
2097 goto out;
2098 }
2099
2100 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2101 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2102 if (hret != H_SUCCESS) {
2103 ehea_error("query_ehea_port failed");
2104 goto out;
2105 }
2106
2107 index = (vid / 64);
2108 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2109
2110 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2111 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2112 if (hret != H_SUCCESS)
2113 ehea_error("modify_ehea_port failed");
2114 out:
2115 kfree(cb1);
2116 return;
2117 }
2118
2119 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2120 {
2121 int ret = -EIO;
2122 u64 hret;
2123 u16 dummy16 = 0;
2124 u64 dummy64 = 0;
2125 struct hcp_modify_qp_cb0* cb0;
2126
2127 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2128 if (!cb0) {
2129 ret = -ENOMEM;
2130 goto out;
2131 }
2132
2133 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2134 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2135 if (hret != H_SUCCESS) {
2136 ehea_error("query_ehea_qp failed (1)");
2137 goto out;
2138 }
2139
2140 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2141 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2142 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2143 &dummy64, &dummy64, &dummy16, &dummy16);
2144 if (hret != H_SUCCESS) {
2145 ehea_error("modify_ehea_qp failed (1)");
2146 goto out;
2147 }
2148
2149 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2150 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2151 if (hret != H_SUCCESS) {
2152 ehea_error("query_ehea_qp failed (2)");
2153 goto out;
2154 }
2155
2156 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2157 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2158 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2159 &dummy64, &dummy64, &dummy16, &dummy16);
2160 if (hret != H_SUCCESS) {
2161 ehea_error("modify_ehea_qp failed (2)");
2162 goto out;
2163 }
2164
2165 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2166 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2167 if (hret != H_SUCCESS) {
2168 ehea_error("query_ehea_qp failed (3)");
2169 goto out;
2170 }
2171
2172 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2173 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2174 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2175 &dummy64, &dummy64, &dummy16, &dummy16);
2176 if (hret != H_SUCCESS) {
2177 ehea_error("modify_ehea_qp failed (3)");
2178 goto out;
2179 }
2180
2181 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2182 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2183 if (hret != H_SUCCESS) {
2184 ehea_error("query_ehea_qp failed (4)");
2185 goto out;
2186 }
2187
2188 ret = 0;
2189 out:
2190 kfree(cb0);
2191 return ret;
2192 }
2193
2194 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2195 int add_tx_qps)
2196 {
2197 int ret, i;
2198 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2199 enum ehea_eq_type eq_type = EHEA_EQ;
2200
2201 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2202 EHEA_MAX_ENTRIES_EQ, 1);
2203 if (!port->qp_eq) {
2204 ret = -EINVAL;
2205 ehea_error("ehea_create_eq failed (qp_eq)");
2206 goto out_kill_eq;
2207 }
2208
2209 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2210 pr_cfg.max_entries_scq = sq_entries * 2;
2211 pr_cfg.max_entries_sq = sq_entries;
2212 pr_cfg.max_entries_rq1 = rq1_entries;
2213 pr_cfg.max_entries_rq2 = rq2_entries;
2214 pr_cfg.max_entries_rq3 = rq3_entries;
2215
2216 pr_cfg_small_rx.max_entries_rcq = 1;
2217 pr_cfg_small_rx.max_entries_scq = sq_entries;
2218 pr_cfg_small_rx.max_entries_sq = sq_entries;
2219 pr_cfg_small_rx.max_entries_rq1 = 1;
2220 pr_cfg_small_rx.max_entries_rq2 = 1;
2221 pr_cfg_small_rx.max_entries_rq3 = 1;
2222
2223 for (i = 0; i < def_qps; i++) {
2224 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2225 if (ret)
2226 goto out_clean_pr;
2227 }
2228 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2229 ret = ehea_init_port_res(port, &port->port_res[i],
2230 &pr_cfg_small_rx, i);
2231 if (ret)
2232 goto out_clean_pr;
2233 }
2234
2235 return 0;
2236
2237 out_clean_pr:
2238 while (--i >= 0)
2239 ehea_clean_portres(port, &port->port_res[i]);
2240
2241 out_kill_eq:
2242 ehea_destroy_eq(port->qp_eq);
2243 return ret;
2244 }
2245
2246 static int ehea_clean_all_portres(struct ehea_port *port)
2247 {
2248 int ret = 0;
2249 int i;
2250
2251 for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2252 ret |= ehea_clean_portres(port, &port->port_res[i]);
2253
2254 ret |= ehea_destroy_eq(port->qp_eq);
2255
2256 return ret;
2257 }
2258
2259 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2260 {
2261 if (adapter->active_ports)
2262 return;
2263
2264 ehea_rem_mr(&adapter->mr);
2265 }
2266
2267 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2268 {
2269 if (adapter->active_ports)
2270 return 0;
2271
2272 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2273 }
2274
2275 static int ehea_up(struct net_device *dev)
2276 {
2277 int ret, i;
2278 struct ehea_port *port = netdev_priv(dev);
2279
2280 if (port->state == EHEA_PORT_UP)
2281 return 0;
2282
2283 ret = ehea_port_res_setup(port, port->num_def_qps,
2284 port->num_add_tx_qps);
2285 if (ret) {
2286 ehea_error("port_res_failed");
2287 goto out;
2288 }
2289
2290 /* Set default QP for this port */
2291 ret = ehea_configure_port(port);
2292 if (ret) {
2293 ehea_error("ehea_configure_port failed. ret:%d", ret);
2294 goto out_clean_pr;
2295 }
2296
2297 ret = ehea_reg_interrupts(dev);
2298 if (ret) {
2299 ehea_error("reg_interrupts failed. ret:%d", ret);
2300 goto out_clean_pr;
2301 }
2302
2303 for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2304 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2305 if (ret) {
2306 ehea_error("activate_qp failed");
2307 goto out_free_irqs;
2308 }
2309 }
2310
2311 for(i = 0; i < port->num_def_qps; i++) {
2312 ret = ehea_fill_port_res(&port->port_res[i]);
2313 if (ret) {
2314 ehea_error("out_free_irqs");
2315 goto out_free_irqs;
2316 }
2317 }
2318
2319 ret = 0;
2320 port->state = EHEA_PORT_UP;
2321 goto out;
2322
2323 out_free_irqs:
2324 ehea_free_interrupts(dev);
2325
2326 out_clean_pr:
2327 ehea_clean_all_portres(port);
2328 out:
2329 if (ret)
2330 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2331
2332 return ret;
2333 }
2334
2335 static void port_napi_disable(struct ehea_port *port)
2336 {
2337 int i;
2338
2339 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2340 napi_disable(&port->port_res[i].napi);
2341 }
2342
2343 static void port_napi_enable(struct ehea_port *port)
2344 {
2345 int i;
2346
2347 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2348 napi_enable(&port->port_res[i].napi);
2349 }
2350
2351 static int ehea_open(struct net_device *dev)
2352 {
2353 int ret;
2354 struct ehea_port *port = netdev_priv(dev);
2355
2356 down(&port->port_lock);
2357
2358 if (netif_msg_ifup(port))
2359 ehea_info("enabling port %s", dev->name);
2360
2361 ret = ehea_up(dev);
2362 if (!ret) {
2363 port_napi_enable(port);
2364 netif_start_queue(dev);
2365 }
2366
2367 up(&port->port_lock);
2368
2369 return ret;
2370 }
2371
2372 static int ehea_down(struct net_device *dev)
2373 {
2374 int ret;
2375 struct ehea_port *port = netdev_priv(dev);
2376
2377 if (port->state == EHEA_PORT_DOWN)
2378 return 0;
2379
2380 ehea_drop_multicast_list(dev);
2381 ehea_free_interrupts(dev);
2382
2383 port->state = EHEA_PORT_DOWN;
2384
2385 ret = ehea_clean_all_portres(port);
2386 if (ret)
2387 ehea_info("Failed freeing resources for %s. ret=%i",
2388 dev->name, ret);
2389
2390 return ret;
2391 }
2392
2393 static int ehea_stop(struct net_device *dev)
2394 {
2395 int ret;
2396 struct ehea_port *port = netdev_priv(dev);
2397
2398 if (netif_msg_ifdown(port))
2399 ehea_info("disabling port %s", dev->name);
2400
2401 flush_scheduled_work();
2402 down(&port->port_lock);
2403 netif_stop_queue(dev);
2404 port_napi_disable(port);
2405 ret = ehea_down(dev);
2406 up(&port->port_lock);
2407 return ret;
2408 }
2409
2410 void ehea_purge_sq(struct ehea_qp *orig_qp)
2411 {
2412 struct ehea_qp qp = *orig_qp;
2413 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2414 struct ehea_swqe *swqe;
2415 int wqe_index;
2416 int i;
2417
2418 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2419 swqe = ehea_get_swqe(&qp, &wqe_index);
2420 swqe->tx_control |= EHEA_SWQE_PURGE;
2421 }
2422 }
2423
2424 int ehea_stop_qps(struct net_device *dev)
2425 {
2426 struct ehea_port *port = netdev_priv(dev);
2427 struct ehea_adapter *adapter = port->adapter;
2428 struct hcp_modify_qp_cb0* cb0;
2429 int ret = -EIO;
2430 int dret;
2431 int i;
2432 u64 hret;
2433 u64 dummy64 = 0;
2434 u16 dummy16 = 0;
2435
2436 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2437 if (!cb0) {
2438 ret = -ENOMEM;
2439 goto out;
2440 }
2441
2442 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2443 struct ehea_port_res *pr = &port->port_res[i];
2444 struct ehea_qp *qp = pr->qp;
2445
2446 /* Purge send queue */
2447 ehea_purge_sq(qp);
2448
2449 /* Disable queue pair */
2450 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2451 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2452 cb0);
2453 if (hret != H_SUCCESS) {
2454 ehea_error("query_ehea_qp failed (1)");
2455 goto out;
2456 }
2457
2458 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2459 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2460
2461 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2462 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2463 1), cb0, &dummy64,
2464 &dummy64, &dummy16, &dummy16);
2465 if (hret != H_SUCCESS) {
2466 ehea_error("modify_ehea_qp failed (1)");
2467 goto out;
2468 }
2469
2470 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2471 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2472 cb0);
2473 if (hret != H_SUCCESS) {
2474 ehea_error("query_ehea_qp failed (2)");
2475 goto out;
2476 }
2477
2478 /* deregister shared memory regions */
2479 dret = ehea_rem_smrs(pr);
2480 if (dret) {
2481 ehea_error("unreg shared memory region failed");
2482 goto out;
2483 }
2484 }
2485
2486 ret = 0;
2487 out:
2488 kfree(cb0);
2489
2490 return ret;
2491 }
2492
2493 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res * pr)
2494 {
2495 struct ehea_qp qp = *orig_qp;
2496 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2497 struct ehea_rwqe *rwqe;
2498 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2499 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2500 struct sk_buff *skb;
2501 u32 lkey = pr->recv_mr.lkey;
2502
2503
2504 int i;
2505 int index;
2506
2507 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2508 rwqe = ehea_get_next_rwqe(&qp, 2);
2509 rwqe->sg_list[0].l_key = lkey;
2510 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2511 skb = skba_rq2[index];
2512 if (skb)
2513 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2514 }
2515
2516 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2517 rwqe = ehea_get_next_rwqe(&qp, 3);
2518 rwqe->sg_list[0].l_key = lkey;
2519 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2520 skb = skba_rq3[index];
2521 if (skb)
2522 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2523 }
2524 }
2525
2526 int ehea_restart_qps(struct net_device *dev)
2527 {
2528 struct ehea_port *port = netdev_priv(dev);
2529 struct ehea_adapter *adapter = port->adapter;
2530 int ret = 0;
2531 int i;
2532
2533 struct hcp_modify_qp_cb0* cb0;
2534 u64 hret;
2535 u64 dummy64 = 0;
2536 u16 dummy16 = 0;
2537
2538 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2539 if (!cb0) {
2540 ret = -ENOMEM;
2541 goto out;
2542 }
2543
2544 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2545 struct ehea_port_res *pr = &port->port_res[i];
2546 struct ehea_qp *qp = pr->qp;
2547
2548 ret = ehea_gen_smrs(pr);
2549 if (ret) {
2550 ehea_error("creation of shared memory regions failed");
2551 goto out;
2552 }
2553
2554 ehea_update_rqs(qp, pr);
2555
2556 /* Enable queue pair */
2557 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2558 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2559 cb0);
2560 if (hret != H_SUCCESS) {
2561 ehea_error("query_ehea_qp failed (1)");
2562 goto out;
2563 }
2564
2565 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2566 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2567
2568 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2569 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2570 1), cb0, &dummy64,
2571 &dummy64, &dummy16, &dummy16);
2572 if (hret != H_SUCCESS) {
2573 ehea_error("modify_ehea_qp failed (1)");
2574 goto out;
2575 }
2576
2577 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2578 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2579 cb0);
2580 if (hret != H_SUCCESS) {
2581 ehea_error("query_ehea_qp failed (2)");
2582 goto out;
2583 }
2584
2585 /* refill entire queue */
2586 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2587 ehea_refill_rq2(pr, 0);
2588 ehea_refill_rq3(pr, 0);
2589 }
2590 out:
2591 kfree(cb0);
2592
2593 return ret;
2594 }
2595
2596 static void ehea_reset_port(struct work_struct *work)
2597 {
2598 int ret;
2599 struct ehea_port *port =
2600 container_of(work, struct ehea_port, reset_task);
2601 struct net_device *dev = port->netdev;
2602
2603 port->resets++;
2604 down(&port->port_lock);
2605 netif_stop_queue(dev);
2606
2607 port_napi_disable(port);
2608
2609 ehea_down(dev);
2610
2611 ret = ehea_up(dev);
2612 if (ret)
2613 goto out;
2614
2615 ehea_set_multicast_list(dev);
2616
2617 if (netif_msg_timer(port))
2618 ehea_info("Device %s resetted successfully", dev->name);
2619
2620 port_napi_enable(port);
2621
2622 netif_wake_queue(dev);
2623 out:
2624 up(&port->port_lock);
2625 return;
2626 }
2627
2628 static void ehea_rereg_mrs(struct work_struct *work)
2629 {
2630 int ret, i;
2631 struct ehea_adapter *adapter;
2632
2633 down(&dlpar_mem_lock);
2634 ehea_info("LPAR memory enlarged - re-initializing driver");
2635
2636 list_for_each_entry(adapter, &adapter_list, list)
2637 if (adapter->active_ports) {
2638 /* Shutdown all ports */
2639 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2640 struct ehea_port *port = adapter->port[i];
2641
2642 if (port) {
2643 struct net_device *dev = port->netdev;
2644
2645 if (dev->flags & IFF_UP) {
2646 down(&port->port_lock);
2647 netif_stop_queue(dev);
2648 ret = ehea_stop_qps(dev);
2649 if (ret) {
2650 up(&port->port_lock);
2651 goto out;
2652 }
2653 port_napi_disable(port);
2654 up(&port->port_lock);
2655 }
2656 }
2657 }
2658
2659 /* Unregister old memory region */
2660 ret = ehea_rem_mr(&adapter->mr);
2661 if (ret) {
2662 ehea_error("unregister MR failed - driver"
2663 " inoperable!");
2664 goto out;
2665 }
2666 }
2667
2668 ehea_destroy_busmap();
2669 ret = ehea_create_busmap();
2670 if (ret) {
2671 ehea_error("creating ehea busmap failed");
2672 goto out;
2673 }
2674
2675 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2676
2677 list_for_each_entry(adapter, &adapter_list, list)
2678 if (adapter->active_ports) {
2679 /* Register new memory region */
2680 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2681 if (ret) {
2682 ehea_error("register MR failed - driver"
2683 " inoperable!");
2684 goto out;
2685 }
2686
2687 /* Restart all ports */
2688 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2689 struct ehea_port *port = adapter->port[i];
2690
2691 if (port) {
2692 struct net_device *dev = port->netdev;
2693
2694 if (dev->flags & IFF_UP) {
2695 down(&port->port_lock);
2696 port_napi_enable(port);
2697 ret = ehea_restart_qps(dev);
2698 if (!ret)
2699 netif_wake_queue(dev);
2700 up(&port->port_lock);
2701 }
2702 }
2703 }
2704 }
2705 up(&dlpar_mem_lock);
2706 ehea_info("re-initializing driver complete");
2707 out:
2708 return;
2709 }
2710
2711 static void ehea_tx_watchdog(struct net_device *dev)
2712 {
2713 struct ehea_port *port = netdev_priv(dev);
2714
2715 if (netif_carrier_ok(dev) &&
2716 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2717 schedule_work(&port->reset_task);
2718 }
2719
2720 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2721 {
2722 struct hcp_query_ehea *cb;
2723 u64 hret;
2724 int ret;
2725
2726 cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2727 if (!cb) {
2728 ret = -ENOMEM;
2729 goto out;
2730 }
2731
2732 hret = ehea_h_query_ehea(adapter->handle, cb);
2733
2734 if (hret != H_SUCCESS) {
2735 ret = -EIO;
2736 goto out_herr;
2737 }
2738
2739 adapter->max_mc_mac = cb->max_mc_mac - 1;
2740 ret = 0;
2741
2742 out_herr:
2743 kfree(cb);
2744 out:
2745 return ret;
2746 }
2747
2748 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2749 {
2750 struct hcp_ehea_port_cb4 *cb4;
2751 u64 hret;
2752 int ret = 0;
2753
2754 *jumbo = 0;
2755
2756 /* (Try to) enable *jumbo frames */
2757 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2758 if (!cb4) {
2759 ehea_error("no mem for cb4");
2760 ret = -ENOMEM;
2761 goto out;
2762 } else {
2763 hret = ehea_h_query_ehea_port(port->adapter->handle,
2764 port->logical_port_id,
2765 H_PORT_CB4,
2766 H_PORT_CB4_JUMBO, cb4);
2767 if (hret == H_SUCCESS) {
2768 if (cb4->jumbo_frame)
2769 *jumbo = 1;
2770 else {
2771 cb4->jumbo_frame = 1;
2772 hret = ehea_h_modify_ehea_port(port->adapter->
2773 handle,
2774 port->
2775 logical_port_id,
2776 H_PORT_CB4,
2777 H_PORT_CB4_JUMBO,
2778 cb4);
2779 if (hret == H_SUCCESS)
2780 *jumbo = 1;
2781 }
2782 } else
2783 ret = -EINVAL;
2784
2785 kfree(cb4);
2786 }
2787 out:
2788 return ret;
2789 }
2790
2791 static ssize_t ehea_show_port_id(struct device *dev,
2792 struct device_attribute *attr, char *buf)
2793 {
2794 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2795 return sprintf(buf, "%d", port->logical_port_id);
2796 }
2797
2798 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2799 NULL);
2800
2801 static void __devinit logical_port_release(struct device *dev)
2802 {
2803 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2804 of_node_put(port->ofdev.node);
2805 }
2806
2807 static int ehea_driver_sysfs_add(struct device *dev,
2808 struct device_driver *driver)
2809 {
2810 int ret;
2811
2812 ret = sysfs_create_link(&driver->kobj, &dev->kobj,
2813 kobject_name(&dev->kobj));
2814 if (ret == 0) {
2815 ret = sysfs_create_link(&dev->kobj, &driver->kobj,
2816 "driver");
2817 if (ret)
2818 sysfs_remove_link(&driver->kobj,
2819 kobject_name(&dev->kobj));
2820 }
2821 return ret;
2822 }
2823
2824 static void ehea_driver_sysfs_remove(struct device *dev,
2825 struct device_driver *driver)
2826 {
2827 struct device_driver *drv = driver;
2828
2829 if (drv) {
2830 sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
2831 sysfs_remove_link(&dev->kobj, "driver");
2832 }
2833 }
2834
2835 static struct device *ehea_register_port(struct ehea_port *port,
2836 struct device_node *dn)
2837 {
2838 int ret;
2839
2840 port->ofdev.node = of_node_get(dn);
2841 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2842 port->ofdev.dev.bus = &ibmebus_bus_type;
2843
2844 sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
2845 port->ofdev.dev.release = logical_port_release;
2846
2847 ret = of_device_register(&port->ofdev);
2848 if (ret) {
2849 ehea_error("failed to register device. ret=%d", ret);
2850 goto out;
2851 }
2852
2853 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2854 if (ret) {
2855 ehea_error("failed to register attributes, ret=%d", ret);
2856 goto out_unreg_of_dev;
2857 }
2858
2859 ret = ehea_driver_sysfs_add(&port->ofdev.dev, &ehea_driver.driver);
2860 if (ret) {
2861 ehea_error("failed to register sysfs driver link");
2862 goto out_rem_dev_file;
2863 }
2864
2865 return &port->ofdev.dev;
2866
2867 out_rem_dev_file:
2868 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2869 out_unreg_of_dev:
2870 of_device_unregister(&port->ofdev);
2871 out:
2872 return NULL;
2873 }
2874
2875 static void ehea_unregister_port(struct ehea_port *port)
2876 {
2877 ehea_driver_sysfs_remove(&port->ofdev.dev, &ehea_driver.driver);
2878 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2879 of_device_unregister(&port->ofdev);
2880 }
2881
2882 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2883 u32 logical_port_id,
2884 struct device_node *dn)
2885 {
2886 int ret;
2887 struct net_device *dev;
2888 struct ehea_port *port;
2889 struct device *port_dev;
2890 int jumbo;
2891
2892 /* allocate memory for the port structures */
2893 dev = alloc_etherdev(sizeof(struct ehea_port));
2894
2895 if (!dev) {
2896 ehea_error("no mem for net_device");
2897 ret = -ENOMEM;
2898 goto out_err;
2899 }
2900
2901 port = netdev_priv(dev);
2902
2903 sema_init(&port->port_lock, 1);
2904 port->state = EHEA_PORT_DOWN;
2905 port->sig_comp_iv = sq_entries / 10;
2906
2907 port->adapter = adapter;
2908 port->netdev = dev;
2909 port->logical_port_id = logical_port_id;
2910
2911 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2912
2913 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2914 if (!port->mc_list) {
2915 ret = -ENOMEM;
2916 goto out_free_ethdev;
2917 }
2918
2919 INIT_LIST_HEAD(&port->mc_list->list);
2920
2921 ret = ehea_sense_port_attr(port);
2922 if (ret)
2923 goto out_free_mc_list;
2924
2925 port_dev = ehea_register_port(port, dn);
2926 if (!port_dev)
2927 goto out_free_mc_list;
2928
2929 SET_NETDEV_DEV(dev, port_dev);
2930
2931 /* initialize net_device structure */
2932 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2933
2934 dev->open = ehea_open;
2935 #ifdef CONFIG_NET_POLL_CONTROLLER
2936 dev->poll_controller = ehea_netpoll;
2937 #endif
2938 dev->stop = ehea_stop;
2939 dev->hard_start_xmit = ehea_start_xmit;
2940 dev->get_stats = ehea_get_stats;
2941 dev->set_multicast_list = ehea_set_multicast_list;
2942 dev->set_mac_address = ehea_set_mac_addr;
2943 dev->change_mtu = ehea_change_mtu;
2944 dev->vlan_rx_register = ehea_vlan_rx_register;
2945 dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2946 dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2947 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2948 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2949 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2950 | NETIF_F_LLTX;
2951 dev->tx_timeout = &ehea_tx_watchdog;
2952 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2953
2954 INIT_WORK(&port->reset_task, ehea_reset_port);
2955
2956 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2957 if (ret) {
2958 ret = -EIO;
2959 goto out_unreg_port;
2960 }
2961
2962 ehea_set_ethtool_ops(dev);
2963
2964 ret = register_netdev(dev);
2965 if (ret) {
2966 ehea_error("register_netdev failed. ret=%d", ret);
2967 goto out_dereg_bc;
2968 }
2969
2970 port->lro_max_aggr = lro_max_aggr;
2971
2972 ret = ehea_get_jumboframe_status(port, &jumbo);
2973 if (ret)
2974 ehea_error("failed determining jumbo frame status for %s",
2975 port->netdev->name);
2976
2977 ehea_info("%s: Jumbo frames are %sabled", dev->name,
2978 jumbo == 1 ? "en" : "dis");
2979
2980 adapter->active_ports++;
2981
2982 return port;
2983
2984 out_dereg_bc:
2985 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2986
2987 out_unreg_port:
2988 ehea_unregister_port(port);
2989
2990 out_free_mc_list:
2991 kfree(port->mc_list);
2992
2993 out_free_ethdev:
2994 free_netdev(dev);
2995
2996 out_err:
2997 ehea_error("setting up logical port with id=%d failed, ret=%d",
2998 logical_port_id, ret);
2999 return NULL;
3000 }
3001
3002 static void ehea_shutdown_single_port(struct ehea_port *port)
3003 {
3004 unregister_netdev(port->netdev);
3005 ehea_unregister_port(port);
3006 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
3007 kfree(port->mc_list);
3008 free_netdev(port->netdev);
3009 port->adapter->active_ports--;
3010 }
3011
3012 static int ehea_setup_ports(struct ehea_adapter *adapter)
3013 {
3014 struct device_node *lhea_dn;
3015 struct device_node *eth_dn = NULL;
3016
3017 const u32 *dn_log_port_id;
3018 int i = 0;
3019
3020 lhea_dn = adapter->ofdev->node;
3021 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3022
3023 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3024 NULL);
3025 if (!dn_log_port_id) {
3026 ehea_error("bad device node: eth_dn name=%s",
3027 eth_dn->full_name);
3028 continue;
3029 }
3030
3031 if (ehea_add_adapter_mr(adapter)) {
3032 ehea_error("creating MR failed");
3033 of_node_put(eth_dn);
3034 return -EIO;
3035 }
3036
3037 adapter->port[i] = ehea_setup_single_port(adapter,
3038 *dn_log_port_id,
3039 eth_dn);
3040 if (adapter->port[i])
3041 ehea_info("%s -> logical port id #%d",
3042 adapter->port[i]->netdev->name,
3043 *dn_log_port_id);
3044 else
3045 ehea_remove_adapter_mr(adapter);
3046
3047 i++;
3048 };
3049
3050 return 0;
3051 }
3052
3053 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3054 u32 logical_port_id)
3055 {
3056 struct device_node *lhea_dn;
3057 struct device_node *eth_dn = NULL;
3058 const u32 *dn_log_port_id;
3059
3060 lhea_dn = adapter->ofdev->node;
3061 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3062
3063 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3064 NULL);
3065 if (dn_log_port_id)
3066 if (*dn_log_port_id == logical_port_id)
3067 return eth_dn;
3068 };
3069
3070 return NULL;
3071 }
3072
3073 static ssize_t ehea_probe_port(struct device *dev,
3074 struct device_attribute *attr,
3075 const char *buf, size_t count)
3076 {
3077 struct ehea_adapter *adapter = dev->driver_data;
3078 struct ehea_port *port;
3079 struct device_node *eth_dn = NULL;
3080 int i;
3081
3082 u32 logical_port_id;
3083
3084 sscanf(buf, "%d", &logical_port_id);
3085
3086 port = ehea_get_port(adapter, logical_port_id);
3087
3088 if (port) {
3089 ehea_info("adding port with logical port id=%d failed. port "
3090 "already configured as %s.", logical_port_id,
3091 port->netdev->name);
3092 return -EINVAL;
3093 }
3094
3095 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3096
3097 if (!eth_dn) {
3098 ehea_info("no logical port with id %d found", logical_port_id);
3099 return -EINVAL;
3100 }
3101
3102 if (ehea_add_adapter_mr(adapter)) {
3103 ehea_error("creating MR failed");
3104 return -EIO;
3105 }
3106
3107 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3108
3109 of_node_put(eth_dn);
3110
3111 if (port) {
3112 for (i=0; i < EHEA_MAX_PORTS; i++)
3113 if (!adapter->port[i]) {
3114 adapter->port[i] = port;
3115 break;
3116 }
3117
3118 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3119 logical_port_id);
3120 } else {
3121 ehea_remove_adapter_mr(adapter);
3122 return -EIO;
3123 }
3124
3125 return (ssize_t) count;
3126 }
3127
3128 static ssize_t ehea_remove_port(struct device *dev,
3129 struct device_attribute *attr,
3130 const char *buf, size_t count)
3131 {
3132 struct ehea_adapter *adapter = dev->driver_data;
3133 struct ehea_port *port;
3134 int i;
3135 u32 logical_port_id;
3136
3137 sscanf(buf, "%d", &logical_port_id);
3138
3139 port = ehea_get_port(adapter, logical_port_id);
3140
3141 if (port) {
3142 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3143 logical_port_id);
3144
3145 ehea_shutdown_single_port(port);
3146
3147 for (i=0; i < EHEA_MAX_PORTS; i++)
3148 if (adapter->port[i] == port) {
3149 adapter->port[i] = NULL;
3150 break;
3151 }
3152 } else {
3153 ehea_error("removing port with logical port id=%d failed. port "
3154 "not configured.", logical_port_id);
3155 return -EINVAL;
3156 }
3157
3158 ehea_remove_adapter_mr(adapter);
3159
3160 return (ssize_t) count;
3161 }
3162
3163 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3164 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3165
3166 int ehea_create_device_sysfs(struct of_device *dev)
3167 {
3168 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3169 if (ret)
3170 goto out;
3171
3172 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3173 out:
3174 return ret;
3175 }
3176
3177 void ehea_remove_device_sysfs(struct of_device *dev)
3178 {
3179 device_remove_file(&dev->dev, &dev_attr_probe_port);
3180 device_remove_file(&dev->dev, &dev_attr_remove_port);
3181 }
3182
3183 static int __devinit ehea_probe_adapter(struct of_device *dev,
3184 const struct of_device_id *id)
3185 {
3186 struct ehea_adapter *adapter;
3187 const u64 *adapter_handle;
3188 int ret;
3189
3190 if (!dev || !dev->node) {
3191 ehea_error("Invalid ibmebus device probed");
3192 return -EINVAL;
3193 }
3194
3195 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3196 if (!adapter) {
3197 ret = -ENOMEM;
3198 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3199 goto out;
3200 }
3201
3202 list_add(&adapter->list, &adapter_list);
3203
3204 adapter->ofdev = dev;
3205
3206 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3207 NULL);
3208 if (adapter_handle)
3209 adapter->handle = *adapter_handle;
3210
3211 if (!adapter->handle) {
3212 dev_err(&dev->dev, "failed getting handle for adapter"
3213 " '%s'\n", dev->node->full_name);
3214 ret = -ENODEV;
3215 goto out_free_ad;
3216 }
3217
3218 adapter->pd = EHEA_PD_ID;
3219
3220 dev->dev.driver_data = adapter;
3221
3222
3223 /* initialize adapter and ports */
3224 /* get adapter properties */
3225 ret = ehea_sense_adapter_attr(adapter);
3226 if (ret) {
3227 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3228 goto out_free_ad;
3229 }
3230
3231 adapter->neq = ehea_create_eq(adapter,
3232 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3233 if (!adapter->neq) {
3234 ret = -EIO;
3235 dev_err(&dev->dev, "NEQ creation failed\n");
3236 goto out_free_ad;
3237 }
3238
3239 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3240 (unsigned long)adapter);
3241
3242 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3243 ehea_interrupt_neq, IRQF_DISABLED,
3244 "ehea_neq", adapter);
3245 if (ret) {
3246 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3247 goto out_kill_eq;
3248 }
3249
3250 ret = ehea_create_device_sysfs(dev);
3251 if (ret)
3252 goto out_free_irq;
3253
3254 ret = ehea_setup_ports(adapter);
3255 if (ret) {
3256 dev_err(&dev->dev, "setup_ports failed\n");
3257 goto out_rem_dev_sysfs;
3258 }
3259
3260 ret = 0;
3261 goto out;
3262
3263 out_rem_dev_sysfs:
3264 ehea_remove_device_sysfs(dev);
3265
3266 out_free_irq:
3267 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3268
3269 out_kill_eq:
3270 ehea_destroy_eq(adapter->neq);
3271
3272 out_free_ad:
3273 kfree(adapter);
3274 out:
3275 return ret;
3276 }
3277
3278 static int __devexit ehea_remove(struct of_device *dev)
3279 {
3280 struct ehea_adapter *adapter = dev->dev.driver_data;
3281 int i;
3282
3283 for (i = 0; i < EHEA_MAX_PORTS; i++)
3284 if (adapter->port[i]) {
3285 ehea_shutdown_single_port(adapter->port[i]);
3286 adapter->port[i] = NULL;
3287 }
3288
3289 ehea_remove_device_sysfs(dev);
3290
3291 flush_scheduled_work();
3292
3293 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3294 tasklet_kill(&adapter->neq_tasklet);
3295
3296 ehea_destroy_eq(adapter->neq);
3297 ehea_remove_adapter_mr(adapter);
3298 list_del(&adapter->list);
3299
3300 kfree(adapter);
3301
3302 return 0;
3303 }
3304
3305 static int ehea_reboot_notifier(struct notifier_block *nb,
3306 unsigned long action, void *unused)
3307 {
3308 if (action == SYS_RESTART) {
3309 ehea_info("Reboot: freeing all eHEA resources");
3310 ibmebus_unregister_driver(&ehea_driver);
3311 }
3312 return NOTIFY_DONE;
3313 }
3314
3315 static struct notifier_block ehea_reboot_nb = {
3316 .notifier_call = ehea_reboot_notifier,
3317 };
3318
3319 static int check_module_parm(void)
3320 {
3321 int ret = 0;
3322
3323 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3324 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3325 ehea_info("Bad parameter: rq1_entries");
3326 ret = -EINVAL;
3327 }
3328 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3329 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3330 ehea_info("Bad parameter: rq2_entries");
3331 ret = -EINVAL;
3332 }
3333 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3334 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3335 ehea_info("Bad parameter: rq3_entries");
3336 ret = -EINVAL;
3337 }
3338 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3339 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3340 ehea_info("Bad parameter: sq_entries");
3341 ret = -EINVAL;
3342 }
3343
3344 return ret;
3345 }
3346
3347 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3348 char *buf)
3349 {
3350 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3351 }
3352
3353 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3354 ehea_show_capabilities, NULL);
3355
3356 int __init ehea_module_init(void)
3357 {
3358 int ret;
3359
3360 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3361 DRV_VERSION);
3362
3363
3364 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3365 sema_init(&dlpar_mem_lock, 1);
3366
3367 ret = check_module_parm();
3368 if (ret)
3369 goto out;
3370
3371 ret = ehea_create_busmap();
3372 if (ret)
3373 goto out;
3374
3375 register_reboot_notifier(&ehea_reboot_nb);
3376
3377 ret = ibmebus_register_driver(&ehea_driver);
3378 if (ret) {
3379 ehea_error("failed registering eHEA device driver on ebus");
3380 goto out;
3381 }
3382
3383 ret = driver_create_file(&ehea_driver.driver,
3384 &driver_attr_capabilities);
3385 if (ret) {
3386 ehea_error("failed to register capabilities attribute, ret=%d",
3387 ret);
3388 unregister_reboot_notifier(&ehea_reboot_nb);
3389 ibmebus_unregister_driver(&ehea_driver);
3390 goto out;
3391 }
3392
3393 out:
3394 return ret;
3395 }
3396
3397 static void __exit ehea_module_exit(void)
3398 {
3399 flush_scheduled_work();
3400 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3401 ibmebus_unregister_driver(&ehea_driver);
3402 unregister_reboot_notifier(&ehea_reboot_nb);
3403 ehea_destroy_busmap();
3404 }
3405
3406 module_init(ehea_module_init);
3407 module_exit(ehea_module_exit);
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