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drivers/net: use vzalloc()
[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/slab.h>
36 #include <linux/if_ether.h>
37 #include <linux/notifier.h>
38 #include <linux/reboot.h>
39 #include <linux/memory.h>
40 #include <asm/kexec.h>
41 #include <linux/mutex.h>
42
43 #include <net/ip.h>
44
45 #include "ehea.h"
46 #include "ehea_qmr.h"
47 #include "ehea_phyp.h"
48
49
50 MODULE_LICENSE("GPL");
51 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
52 MODULE_DESCRIPTION("IBM eServer HEA Driver");
53 MODULE_VERSION(DRV_VERSION);
54
55
56 static int msg_level = -1;
57 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
58 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
59 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
60 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
61 static int use_mcs;
62 static int use_lro;
63 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
64 static int num_tx_qps = EHEA_NUM_TX_QP;
65 static int prop_carrier_state;
66
67 module_param(msg_level, int, 0);
68 module_param(rq1_entries, int, 0);
69 module_param(rq2_entries, int, 0);
70 module_param(rq3_entries, int, 0);
71 module_param(sq_entries, int, 0);
72 module_param(prop_carrier_state, int, 0);
73 module_param(use_mcs, int, 0);
74 module_param(use_lro, int, 0);
75 module_param(lro_max_aggr, int, 0);
76 module_param(num_tx_qps, int, 0);
77
78 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
79 MODULE_PARM_DESC(msg_level, "msg_level");
80 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
81 "port to stack. 1:yes, 0:no. Default = 0 ");
82 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
83 "[2^x - 1], x = [6..14]. Default = "
84 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
85 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
86 "[2^x - 1], x = [6..14]. Default = "
87 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
88 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
89 "[2^x - 1], x = [6..14]. Default = "
90 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
91 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
92 "[2^x - 1], x = [6..14]. Default = "
93 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
94 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
95
96 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
97 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
98 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
99 "Default = 0");
100
101 static int port_name_cnt;
102 static LIST_HEAD(adapter_list);
103 static unsigned long ehea_driver_flags;
104 struct work_struct ehea_rereg_mr_task;
105 static DEFINE_MUTEX(dlpar_mem_lock);
106 struct ehea_fw_handle_array ehea_fw_handles;
107 struct ehea_bcmc_reg_array ehea_bcmc_regs;
108
109
110 static int __devinit ehea_probe_adapter(struct platform_device *dev,
111 const struct of_device_id *id);
112
113 static int __devexit ehea_remove(struct platform_device *dev);
114
115 static struct of_device_id ehea_device_table[] = {
116 {
117 .name = "lhea",
118 .compatible = "IBM,lhea",
119 },
120 {},
121 };
122 MODULE_DEVICE_TABLE(of, ehea_device_table);
123
124 static struct of_platform_driver ehea_driver = {
125 .driver = {
126 .name = "ehea",
127 .owner = THIS_MODULE,
128 .of_match_table = ehea_device_table,
129 },
130 .probe = ehea_probe_adapter,
131 .remove = ehea_remove,
132 };
133
134 void ehea_dump(void *adr, int len, char *msg)
135 {
136 int x;
137 unsigned char *deb = adr;
138 for (x = 0; x < len; x += 16) {
139 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
140 deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
141 deb += 16;
142 }
143 }
144
145 void ehea_schedule_port_reset(struct ehea_port *port)
146 {
147 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
148 schedule_work(&port->reset_task);
149 }
150
151 static void ehea_update_firmware_handles(void)
152 {
153 struct ehea_fw_handle_entry *arr = NULL;
154 struct ehea_adapter *adapter;
155 int num_adapters = 0;
156 int num_ports = 0;
157 int num_portres = 0;
158 int i = 0;
159 int num_fw_handles, k, l;
160
161 /* Determine number of handles */
162 mutex_lock(&ehea_fw_handles.lock);
163
164 list_for_each_entry(adapter, &adapter_list, list) {
165 num_adapters++;
166
167 for (k = 0; k < EHEA_MAX_PORTS; k++) {
168 struct ehea_port *port = adapter->port[k];
169
170 if (!port || (port->state != EHEA_PORT_UP))
171 continue;
172
173 num_ports++;
174 num_portres += port->num_def_qps + port->num_add_tx_qps;
175 }
176 }
177
178 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
179 num_ports * EHEA_NUM_PORT_FW_HANDLES +
180 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
181
182 if (num_fw_handles) {
183 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
184 if (!arr)
185 goto out; /* Keep the existing array */
186 } else
187 goto out_update;
188
189 list_for_each_entry(adapter, &adapter_list, list) {
190 if (num_adapters == 0)
191 break;
192
193 for (k = 0; k < EHEA_MAX_PORTS; k++) {
194 struct ehea_port *port = adapter->port[k];
195
196 if (!port || (port->state != EHEA_PORT_UP) ||
197 (num_ports == 0))
198 continue;
199
200 for (l = 0;
201 l < port->num_def_qps + port->num_add_tx_qps;
202 l++) {
203 struct ehea_port_res *pr = &port->port_res[l];
204
205 arr[i].adh = adapter->handle;
206 arr[i++].fwh = pr->qp->fw_handle;
207 arr[i].adh = adapter->handle;
208 arr[i++].fwh = pr->send_cq->fw_handle;
209 arr[i].adh = adapter->handle;
210 arr[i++].fwh = pr->recv_cq->fw_handle;
211 arr[i].adh = adapter->handle;
212 arr[i++].fwh = pr->eq->fw_handle;
213 arr[i].adh = adapter->handle;
214 arr[i++].fwh = pr->send_mr.handle;
215 arr[i].adh = adapter->handle;
216 arr[i++].fwh = pr->recv_mr.handle;
217 }
218 arr[i].adh = adapter->handle;
219 arr[i++].fwh = port->qp_eq->fw_handle;
220 num_ports--;
221 }
222
223 arr[i].adh = adapter->handle;
224 arr[i++].fwh = adapter->neq->fw_handle;
225
226 if (adapter->mr.handle) {
227 arr[i].adh = adapter->handle;
228 arr[i++].fwh = adapter->mr.handle;
229 }
230 num_adapters--;
231 }
232
233 out_update:
234 kfree(ehea_fw_handles.arr);
235 ehea_fw_handles.arr = arr;
236 ehea_fw_handles.num_entries = i;
237 out:
238 mutex_unlock(&ehea_fw_handles.lock);
239 }
240
241 static void ehea_update_bcmc_registrations(void)
242 {
243 unsigned long flags;
244 struct ehea_bcmc_reg_entry *arr = NULL;
245 struct ehea_adapter *adapter;
246 struct ehea_mc_list *mc_entry;
247 int num_registrations = 0;
248 int i = 0;
249 int k;
250
251 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
252
253 /* Determine number of registrations */
254 list_for_each_entry(adapter, &adapter_list, list)
255 for (k = 0; k < EHEA_MAX_PORTS; k++) {
256 struct ehea_port *port = adapter->port[k];
257
258 if (!port || (port->state != EHEA_PORT_UP))
259 continue;
260
261 num_registrations += 2; /* Broadcast registrations */
262
263 list_for_each_entry(mc_entry, &port->mc_list->list,list)
264 num_registrations += 2;
265 }
266
267 if (num_registrations) {
268 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
269 if (!arr)
270 goto out; /* Keep the existing array */
271 } else
272 goto out_update;
273
274 list_for_each_entry(adapter, &adapter_list, list) {
275 for (k = 0; k < EHEA_MAX_PORTS; k++) {
276 struct ehea_port *port = adapter->port[k];
277
278 if (!port || (port->state != EHEA_PORT_UP))
279 continue;
280
281 if (num_registrations == 0)
282 goto out_update;
283
284 arr[i].adh = adapter->handle;
285 arr[i].port_id = port->logical_port_id;
286 arr[i].reg_type = EHEA_BCMC_BROADCAST |
287 EHEA_BCMC_UNTAGGED;
288 arr[i++].macaddr = port->mac_addr;
289
290 arr[i].adh = adapter->handle;
291 arr[i].port_id = port->logical_port_id;
292 arr[i].reg_type = EHEA_BCMC_BROADCAST |
293 EHEA_BCMC_VLANID_ALL;
294 arr[i++].macaddr = port->mac_addr;
295 num_registrations -= 2;
296
297 list_for_each_entry(mc_entry,
298 &port->mc_list->list, list) {
299 if (num_registrations == 0)
300 goto out_update;
301
302 arr[i].adh = adapter->handle;
303 arr[i].port_id = port->logical_port_id;
304 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
305 EHEA_BCMC_MULTICAST |
306 EHEA_BCMC_UNTAGGED;
307 arr[i++].macaddr = mc_entry->macaddr;
308
309 arr[i].adh = adapter->handle;
310 arr[i].port_id = port->logical_port_id;
311 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
312 EHEA_BCMC_MULTICAST |
313 EHEA_BCMC_VLANID_ALL;
314 arr[i++].macaddr = mc_entry->macaddr;
315 num_registrations -= 2;
316 }
317 }
318 }
319
320 out_update:
321 kfree(ehea_bcmc_regs.arr);
322 ehea_bcmc_regs.arr = arr;
323 ehea_bcmc_regs.num_entries = i;
324 out:
325 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
326 }
327
328 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
329 {
330 struct ehea_port *port = netdev_priv(dev);
331 struct net_device_stats *stats = &port->stats;
332 struct hcp_ehea_port_cb2 *cb2;
333 u64 hret, rx_packets, tx_packets, rx_bytes = 0, tx_bytes = 0;
334 int i;
335
336 memset(stats, 0, sizeof(*stats));
337
338 cb2 = (void *)get_zeroed_page(GFP_KERNEL);
339 if (!cb2) {
340 ehea_error("no mem for cb2");
341 goto out;
342 }
343
344 hret = ehea_h_query_ehea_port(port->adapter->handle,
345 port->logical_port_id,
346 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
347 if (hret != H_SUCCESS) {
348 ehea_error("query_ehea_port failed");
349 goto out_herr;
350 }
351
352 if (netif_msg_hw(port))
353 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
354
355 rx_packets = 0;
356 for (i = 0; i < port->num_def_qps; i++) {
357 rx_packets += port->port_res[i].rx_packets;
358 rx_bytes += port->port_res[i].rx_bytes;
359 }
360
361 tx_packets = 0;
362 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
363 tx_packets += port->port_res[i].tx_packets;
364 tx_bytes += port->port_res[i].tx_bytes;
365 }
366
367 stats->tx_packets = tx_packets;
368 stats->multicast = cb2->rxmcp;
369 stats->rx_errors = cb2->rxuerr;
370 stats->rx_bytes = rx_bytes;
371 stats->tx_bytes = tx_bytes;
372 stats->rx_packets = rx_packets;
373
374 out_herr:
375 free_page((unsigned long)cb2);
376 out:
377 return stats;
378 }
379
380 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
381 {
382 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
383 struct net_device *dev = pr->port->netdev;
384 int max_index_mask = pr->rq1_skba.len - 1;
385 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
386 int adder = 0;
387 int i;
388
389 pr->rq1_skba.os_skbs = 0;
390
391 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
392 if (nr_of_wqes > 0)
393 pr->rq1_skba.index = index;
394 pr->rq1_skba.os_skbs = fill_wqes;
395 return;
396 }
397
398 for (i = 0; i < fill_wqes; i++) {
399 if (!skb_arr_rq1[index]) {
400 skb_arr_rq1[index] = netdev_alloc_skb(dev,
401 EHEA_L_PKT_SIZE);
402 if (!skb_arr_rq1[index]) {
403 pr->rq1_skba.os_skbs = fill_wqes - i;
404 break;
405 }
406 }
407 index--;
408 index &= max_index_mask;
409 adder++;
410 }
411
412 if (adder == 0)
413 return;
414
415 /* Ring doorbell */
416 ehea_update_rq1a(pr->qp, adder);
417 }
418
419 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
420 {
421 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
422 struct net_device *dev = pr->port->netdev;
423 int i;
424
425 for (i = 0; i < pr->rq1_skba.len; i++) {
426 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
427 if (!skb_arr_rq1[i])
428 break;
429 }
430 /* Ring doorbell */
431 ehea_update_rq1a(pr->qp, nr_rq1a);
432 }
433
434 static int ehea_refill_rq_def(struct ehea_port_res *pr,
435 struct ehea_q_skb_arr *q_skba, int rq_nr,
436 int num_wqes, int wqe_type, int packet_size)
437 {
438 struct net_device *dev = pr->port->netdev;
439 struct ehea_qp *qp = pr->qp;
440 struct sk_buff **skb_arr = q_skba->arr;
441 struct ehea_rwqe *rwqe;
442 int i, index, max_index_mask, fill_wqes;
443 int adder = 0;
444 int ret = 0;
445
446 fill_wqes = q_skba->os_skbs + num_wqes;
447 q_skba->os_skbs = 0;
448
449 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
450 q_skba->os_skbs = fill_wqes;
451 return ret;
452 }
453
454 index = q_skba->index;
455 max_index_mask = q_skba->len - 1;
456 for (i = 0; i < fill_wqes; i++) {
457 u64 tmp_addr;
458 struct sk_buff *skb;
459
460 skb = netdev_alloc_skb_ip_align(dev, packet_size);
461 if (!skb) {
462 q_skba->os_skbs = fill_wqes - i;
463 if (q_skba->os_skbs == q_skba->len - 2) {
464 ehea_info("%s: rq%i ran dry - no mem for skb",
465 pr->port->netdev->name, rq_nr);
466 ret = -ENOMEM;
467 }
468 break;
469 }
470
471 skb_arr[index] = skb;
472 tmp_addr = ehea_map_vaddr(skb->data);
473 if (tmp_addr == -1) {
474 dev_kfree_skb(skb);
475 q_skba->os_skbs = fill_wqes - i;
476 ret = 0;
477 break;
478 }
479
480 rwqe = ehea_get_next_rwqe(qp, rq_nr);
481 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
482 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
483 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
484 rwqe->sg_list[0].vaddr = tmp_addr;
485 rwqe->sg_list[0].len = packet_size;
486 rwqe->data_segments = 1;
487
488 index++;
489 index &= max_index_mask;
490 adder++;
491 }
492
493 q_skba->index = index;
494 if (adder == 0)
495 goto out;
496
497 /* Ring doorbell */
498 iosync();
499 if (rq_nr == 2)
500 ehea_update_rq2a(pr->qp, adder);
501 else
502 ehea_update_rq3a(pr->qp, adder);
503 out:
504 return ret;
505 }
506
507
508 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
509 {
510 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
511 nr_of_wqes, EHEA_RWQE2_TYPE,
512 EHEA_RQ2_PKT_SIZE);
513 }
514
515
516 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
517 {
518 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
519 nr_of_wqes, EHEA_RWQE3_TYPE,
520 EHEA_MAX_PACKET_SIZE);
521 }
522
523 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
524 {
525 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
526 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
527 return 0;
528 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
529 (cqe->header_length == 0))
530 return 0;
531 return -EINVAL;
532 }
533
534 static inline void ehea_fill_skb(struct net_device *dev,
535 struct sk_buff *skb, struct ehea_cqe *cqe)
536 {
537 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
538
539 skb_put(skb, length);
540 skb->protocol = eth_type_trans(skb, dev);
541
542 /* The packet was not an IPV4 packet so a complemented checksum was
543 calculated. The value is found in the Internet Checksum field. */
544 if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
545 skb->ip_summed = CHECKSUM_COMPLETE;
546 skb->csum = csum_unfold(~cqe->inet_checksum_value);
547 } else
548 skb->ip_summed = CHECKSUM_UNNECESSARY;
549 }
550
551 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
552 int arr_len,
553 struct ehea_cqe *cqe)
554 {
555 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
556 struct sk_buff *skb;
557 void *pref;
558 int x;
559
560 x = skb_index + 1;
561 x &= (arr_len - 1);
562
563 pref = skb_array[x];
564 if (pref) {
565 prefetchw(pref);
566 prefetchw(pref + EHEA_CACHE_LINE);
567
568 pref = (skb_array[x]->data);
569 prefetch(pref);
570 prefetch(pref + EHEA_CACHE_LINE);
571 prefetch(pref + EHEA_CACHE_LINE * 2);
572 prefetch(pref + EHEA_CACHE_LINE * 3);
573 }
574
575 skb = skb_array[skb_index];
576 skb_array[skb_index] = NULL;
577 return skb;
578 }
579
580 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
581 int arr_len, int wqe_index)
582 {
583 struct sk_buff *skb;
584 void *pref;
585 int x;
586
587 x = wqe_index + 1;
588 x &= (arr_len - 1);
589
590 pref = skb_array[x];
591 if (pref) {
592 prefetchw(pref);
593 prefetchw(pref + EHEA_CACHE_LINE);
594
595 pref = (skb_array[x]->data);
596 prefetchw(pref);
597 prefetchw(pref + EHEA_CACHE_LINE);
598 }
599
600 skb = skb_array[wqe_index];
601 skb_array[wqe_index] = NULL;
602 return skb;
603 }
604
605 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
606 struct ehea_cqe *cqe, int *processed_rq2,
607 int *processed_rq3)
608 {
609 struct sk_buff *skb;
610
611 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
612 pr->p_stats.err_tcp_cksum++;
613 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
614 pr->p_stats.err_ip_cksum++;
615 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
616 pr->p_stats.err_frame_crc++;
617
618 if (rq == 2) {
619 *processed_rq2 += 1;
620 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
621 dev_kfree_skb(skb);
622 } else if (rq == 3) {
623 *processed_rq3 += 1;
624 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
625 dev_kfree_skb(skb);
626 }
627
628 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
629 if (netif_msg_rx_err(pr->port)) {
630 ehea_error("Critical receive error for QP %d. "
631 "Resetting port.", pr->qp->init_attr.qp_nr);
632 ehea_dump(cqe, sizeof(*cqe), "CQE");
633 }
634 ehea_schedule_port_reset(pr->port);
635 return 1;
636 }
637
638 return 0;
639 }
640
641 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
642 void **tcph, u64 *hdr_flags, void *priv)
643 {
644 struct ehea_cqe *cqe = priv;
645 unsigned int ip_len;
646 struct iphdr *iph;
647
648 /* non tcp/udp packets */
649 if (!cqe->header_length)
650 return -1;
651
652 /* non tcp packet */
653 skb_reset_network_header(skb);
654 iph = ip_hdr(skb);
655 if (iph->protocol != IPPROTO_TCP)
656 return -1;
657
658 ip_len = ip_hdrlen(skb);
659 skb_set_transport_header(skb, ip_len);
660 *tcph = tcp_hdr(skb);
661
662 /* check if ip header and tcp header are complete */
663 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
664 return -1;
665
666 *hdr_flags = LRO_IPV4 | LRO_TCP;
667 *iphdr = iph;
668
669 return 0;
670 }
671
672 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
673 struct sk_buff *skb)
674 {
675 int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
676 pr->port->vgrp);
677
678 if (use_lro) {
679 if (vlan_extracted)
680 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
681 pr->port->vgrp,
682 cqe->vlan_tag,
683 cqe);
684 else
685 lro_receive_skb(&pr->lro_mgr, skb, cqe);
686 } else {
687 if (vlan_extracted)
688 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
689 cqe->vlan_tag);
690 else
691 netif_receive_skb(skb);
692 }
693 }
694
695 static int ehea_proc_rwqes(struct net_device *dev,
696 struct ehea_port_res *pr,
697 int budget)
698 {
699 struct ehea_port *port = pr->port;
700 struct ehea_qp *qp = pr->qp;
701 struct ehea_cqe *cqe;
702 struct sk_buff *skb;
703 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
704 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
705 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
706 int skb_arr_rq1_len = pr->rq1_skba.len;
707 int skb_arr_rq2_len = pr->rq2_skba.len;
708 int skb_arr_rq3_len = pr->rq3_skba.len;
709 int processed, processed_rq1, processed_rq2, processed_rq3;
710 u64 processed_bytes = 0;
711 int wqe_index, last_wqe_index, rq, port_reset;
712
713 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
714 last_wqe_index = 0;
715
716 cqe = ehea_poll_rq1(qp, &wqe_index);
717 while ((processed < budget) && cqe) {
718 ehea_inc_rq1(qp);
719 processed_rq1++;
720 processed++;
721 if (netif_msg_rx_status(port))
722 ehea_dump(cqe, sizeof(*cqe), "CQE");
723
724 last_wqe_index = wqe_index;
725 rmb();
726 if (!ehea_check_cqe(cqe, &rq)) {
727 if (rq == 1) {
728 /* LL RQ1 */
729 skb = get_skb_by_index_ll(skb_arr_rq1,
730 skb_arr_rq1_len,
731 wqe_index);
732 if (unlikely(!skb)) {
733 if (netif_msg_rx_err(port))
734 ehea_error("LL rq1: skb=NULL");
735
736 skb = netdev_alloc_skb(dev,
737 EHEA_L_PKT_SIZE);
738 if (!skb)
739 break;
740 }
741 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
742 cqe->num_bytes_transfered - 4);
743 ehea_fill_skb(dev, skb, cqe);
744 } else if (rq == 2) {
745 /* RQ2 */
746 skb = get_skb_by_index(skb_arr_rq2,
747 skb_arr_rq2_len, cqe);
748 if (unlikely(!skb)) {
749 if (netif_msg_rx_err(port))
750 ehea_error("rq2: skb=NULL");
751 break;
752 }
753 ehea_fill_skb(dev, skb, cqe);
754 processed_rq2++;
755 } else {
756 /* RQ3 */
757 skb = get_skb_by_index(skb_arr_rq3,
758 skb_arr_rq3_len, cqe);
759 if (unlikely(!skb)) {
760 if (netif_msg_rx_err(port))
761 ehea_error("rq3: skb=NULL");
762 break;
763 }
764 ehea_fill_skb(dev, skb, cqe);
765 processed_rq3++;
766 }
767
768 processed_bytes += skb->len;
769 ehea_proc_skb(pr, cqe, skb);
770 } else {
771 pr->p_stats.poll_receive_errors++;
772 port_reset = ehea_treat_poll_error(pr, rq, cqe,
773 &processed_rq2,
774 &processed_rq3);
775 if (port_reset)
776 break;
777 }
778 cqe = ehea_poll_rq1(qp, &wqe_index);
779 }
780 if (use_lro)
781 lro_flush_all(&pr->lro_mgr);
782
783 pr->rx_packets += processed;
784 pr->rx_bytes += processed_bytes;
785
786 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
787 ehea_refill_rq2(pr, processed_rq2);
788 ehea_refill_rq3(pr, processed_rq3);
789
790 return processed;
791 }
792
793 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
794
795 static void reset_sq_restart_flag(struct ehea_port *port)
796 {
797 int i;
798
799 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
800 struct ehea_port_res *pr = &port->port_res[i];
801 pr->sq_restart_flag = 0;
802 }
803 wake_up(&port->restart_wq);
804 }
805
806 static void check_sqs(struct ehea_port *port)
807 {
808 struct ehea_swqe *swqe;
809 int swqe_index;
810 int i, k;
811
812 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
813 struct ehea_port_res *pr = &port->port_res[i];
814 int ret;
815 k = 0;
816 swqe = ehea_get_swqe(pr->qp, &swqe_index);
817 memset(swqe, 0, SWQE_HEADER_SIZE);
818 atomic_dec(&pr->swqe_avail);
819
820 swqe->tx_control |= EHEA_SWQE_PURGE;
821 swqe->wr_id = SWQE_RESTART_CHECK;
822 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
823 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
824 swqe->immediate_data_length = 80;
825
826 ehea_post_swqe(pr->qp, swqe);
827
828 ret = wait_event_timeout(port->restart_wq,
829 pr->sq_restart_flag == 0,
830 msecs_to_jiffies(100));
831
832 if (!ret) {
833 ehea_error("HW/SW queues out of sync");
834 ehea_schedule_port_reset(pr->port);
835 return;
836 }
837 }
838 }
839
840
841 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
842 {
843 struct sk_buff *skb;
844 struct ehea_cq *send_cq = pr->send_cq;
845 struct ehea_cqe *cqe;
846 int quota = my_quota;
847 int cqe_counter = 0;
848 int swqe_av = 0;
849 int index;
850 unsigned long flags;
851
852 cqe = ehea_poll_cq(send_cq);
853 while (cqe && (quota > 0)) {
854 ehea_inc_cq(send_cq);
855
856 cqe_counter++;
857 rmb();
858
859 if (cqe->wr_id == SWQE_RESTART_CHECK) {
860 pr->sq_restart_flag = 1;
861 swqe_av++;
862 break;
863 }
864
865 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
866 ehea_error("Bad send completion status=0x%04X",
867 cqe->status);
868
869 if (netif_msg_tx_err(pr->port))
870 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
871
872 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
873 ehea_error("Resetting port");
874 ehea_schedule_port_reset(pr->port);
875 break;
876 }
877 }
878
879 if (netif_msg_tx_done(pr->port))
880 ehea_dump(cqe, sizeof(*cqe), "CQE");
881
882 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
883 == EHEA_SWQE2_TYPE)) {
884
885 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
886 skb = pr->sq_skba.arr[index];
887 dev_kfree_skb(skb);
888 pr->sq_skba.arr[index] = NULL;
889 }
890
891 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
892 quota--;
893
894 cqe = ehea_poll_cq(send_cq);
895 }
896
897 ehea_update_feca(send_cq, cqe_counter);
898 atomic_add(swqe_av, &pr->swqe_avail);
899
900 spin_lock_irqsave(&pr->netif_queue, flags);
901
902 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
903 >= pr->swqe_refill_th)) {
904 netif_wake_queue(pr->port->netdev);
905 pr->queue_stopped = 0;
906 }
907 spin_unlock_irqrestore(&pr->netif_queue, flags);
908 wake_up(&pr->port->swqe_avail_wq);
909
910 return cqe;
911 }
912
913 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
914 #define EHEA_POLL_MAX_CQES 65535
915
916 static int ehea_poll(struct napi_struct *napi, int budget)
917 {
918 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
919 napi);
920 struct net_device *dev = pr->port->netdev;
921 struct ehea_cqe *cqe;
922 struct ehea_cqe *cqe_skb = NULL;
923 int force_irq, wqe_index;
924 int rx = 0;
925
926 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
927 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
928
929 if (!force_irq)
930 rx += ehea_proc_rwqes(dev, pr, budget - rx);
931
932 while ((rx != budget) || force_irq) {
933 pr->poll_counter = 0;
934 force_irq = 0;
935 napi_complete(napi);
936 ehea_reset_cq_ep(pr->recv_cq);
937 ehea_reset_cq_ep(pr->send_cq);
938 ehea_reset_cq_n1(pr->recv_cq);
939 ehea_reset_cq_n1(pr->send_cq);
940 rmb();
941 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
942 cqe_skb = ehea_poll_cq(pr->send_cq);
943
944 if (!cqe && !cqe_skb)
945 return rx;
946
947 if (!napi_reschedule(napi))
948 return rx;
949
950 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
951 rx += ehea_proc_rwqes(dev, pr, budget - rx);
952 }
953
954 pr->poll_counter++;
955 return rx;
956 }
957
958 #ifdef CONFIG_NET_POLL_CONTROLLER
959 static void ehea_netpoll(struct net_device *dev)
960 {
961 struct ehea_port *port = netdev_priv(dev);
962 int i;
963
964 for (i = 0; i < port->num_def_qps; i++)
965 napi_schedule(&port->port_res[i].napi);
966 }
967 #endif
968
969 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
970 {
971 struct ehea_port_res *pr = param;
972
973 napi_schedule(&pr->napi);
974
975 return IRQ_HANDLED;
976 }
977
978 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
979 {
980 struct ehea_port *port = param;
981 struct ehea_eqe *eqe;
982 struct ehea_qp *qp;
983 u32 qp_token;
984 u64 resource_type, aer, aerr;
985 int reset_port = 0;
986
987 eqe = ehea_poll_eq(port->qp_eq);
988
989 while (eqe) {
990 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
991 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
992 eqe->entry, qp_token);
993
994 qp = port->port_res[qp_token].qp;
995
996 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
997 &aer, &aerr);
998
999 if (resource_type == EHEA_AER_RESTYPE_QP) {
1000 if ((aer & EHEA_AER_RESET_MASK) ||
1001 (aerr & EHEA_AERR_RESET_MASK))
1002 reset_port = 1;
1003 } else
1004 reset_port = 1; /* Reset in case of CQ or EQ error */
1005
1006 eqe = ehea_poll_eq(port->qp_eq);
1007 }
1008
1009 if (reset_port) {
1010 ehea_error("Resetting port");
1011 ehea_schedule_port_reset(port);
1012 }
1013
1014 return IRQ_HANDLED;
1015 }
1016
1017 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1018 int logical_port)
1019 {
1020 int i;
1021
1022 for (i = 0; i < EHEA_MAX_PORTS; i++)
1023 if (adapter->port[i])
1024 if (adapter->port[i]->logical_port_id == logical_port)
1025 return adapter->port[i];
1026 return NULL;
1027 }
1028
1029 int ehea_sense_port_attr(struct ehea_port *port)
1030 {
1031 int ret;
1032 u64 hret;
1033 struct hcp_ehea_port_cb0 *cb0;
1034
1035 /* may be called via ehea_neq_tasklet() */
1036 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1037 if (!cb0) {
1038 ehea_error("no mem for cb0");
1039 ret = -ENOMEM;
1040 goto out;
1041 }
1042
1043 hret = ehea_h_query_ehea_port(port->adapter->handle,
1044 port->logical_port_id, H_PORT_CB0,
1045 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1046 cb0);
1047 if (hret != H_SUCCESS) {
1048 ret = -EIO;
1049 goto out_free;
1050 }
1051
1052 /* MAC address */
1053 port->mac_addr = cb0->port_mac_addr << 16;
1054
1055 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1056 ret = -EADDRNOTAVAIL;
1057 goto out_free;
1058 }
1059
1060 /* Port speed */
1061 switch (cb0->port_speed) {
1062 case H_SPEED_10M_H:
1063 port->port_speed = EHEA_SPEED_10M;
1064 port->full_duplex = 0;
1065 break;
1066 case H_SPEED_10M_F:
1067 port->port_speed = EHEA_SPEED_10M;
1068 port->full_duplex = 1;
1069 break;
1070 case H_SPEED_100M_H:
1071 port->port_speed = EHEA_SPEED_100M;
1072 port->full_duplex = 0;
1073 break;
1074 case H_SPEED_100M_F:
1075 port->port_speed = EHEA_SPEED_100M;
1076 port->full_duplex = 1;
1077 break;
1078 case H_SPEED_1G_F:
1079 port->port_speed = EHEA_SPEED_1G;
1080 port->full_duplex = 1;
1081 break;
1082 case H_SPEED_10G_F:
1083 port->port_speed = EHEA_SPEED_10G;
1084 port->full_duplex = 1;
1085 break;
1086 default:
1087 port->port_speed = 0;
1088 port->full_duplex = 0;
1089 break;
1090 }
1091
1092 port->autoneg = 1;
1093 port->num_mcs = cb0->num_default_qps;
1094
1095 /* Number of default QPs */
1096 if (use_mcs)
1097 port->num_def_qps = cb0->num_default_qps;
1098 else
1099 port->num_def_qps = 1;
1100
1101 if (!port->num_def_qps) {
1102 ret = -EINVAL;
1103 goto out_free;
1104 }
1105
1106 port->num_tx_qps = num_tx_qps;
1107
1108 if (port->num_def_qps >= port->num_tx_qps)
1109 port->num_add_tx_qps = 0;
1110 else
1111 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1112
1113 ret = 0;
1114 out_free:
1115 if (ret || netif_msg_probe(port))
1116 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1117 free_page((unsigned long)cb0);
1118 out:
1119 return ret;
1120 }
1121
1122 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1123 {
1124 struct hcp_ehea_port_cb4 *cb4;
1125 u64 hret;
1126 int ret = 0;
1127
1128 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1129 if (!cb4) {
1130 ehea_error("no mem for cb4");
1131 ret = -ENOMEM;
1132 goto out;
1133 }
1134
1135 cb4->port_speed = port_speed;
1136
1137 netif_carrier_off(port->netdev);
1138
1139 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1140 port->logical_port_id,
1141 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1142 if (hret == H_SUCCESS) {
1143 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1144
1145 hret = ehea_h_query_ehea_port(port->adapter->handle,
1146 port->logical_port_id,
1147 H_PORT_CB4, H_PORT_CB4_SPEED,
1148 cb4);
1149 if (hret == H_SUCCESS) {
1150 switch (cb4->port_speed) {
1151 case H_SPEED_10M_H:
1152 port->port_speed = EHEA_SPEED_10M;
1153 port->full_duplex = 0;
1154 break;
1155 case H_SPEED_10M_F:
1156 port->port_speed = EHEA_SPEED_10M;
1157 port->full_duplex = 1;
1158 break;
1159 case H_SPEED_100M_H:
1160 port->port_speed = EHEA_SPEED_100M;
1161 port->full_duplex = 0;
1162 break;
1163 case H_SPEED_100M_F:
1164 port->port_speed = EHEA_SPEED_100M;
1165 port->full_duplex = 1;
1166 break;
1167 case H_SPEED_1G_F:
1168 port->port_speed = EHEA_SPEED_1G;
1169 port->full_duplex = 1;
1170 break;
1171 case H_SPEED_10G_F:
1172 port->port_speed = EHEA_SPEED_10G;
1173 port->full_duplex = 1;
1174 break;
1175 default:
1176 port->port_speed = 0;
1177 port->full_duplex = 0;
1178 break;
1179 }
1180 } else {
1181 ehea_error("Failed sensing port speed");
1182 ret = -EIO;
1183 }
1184 } else {
1185 if (hret == H_AUTHORITY) {
1186 ehea_info("Hypervisor denied setting port speed");
1187 ret = -EPERM;
1188 } else {
1189 ret = -EIO;
1190 ehea_error("Failed setting port speed");
1191 }
1192 }
1193 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1194 netif_carrier_on(port->netdev);
1195
1196 free_page((unsigned long)cb4);
1197 out:
1198 return ret;
1199 }
1200
1201 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1202 {
1203 int ret;
1204 u8 ec;
1205 u8 portnum;
1206 struct ehea_port *port;
1207
1208 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1209 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1210 port = ehea_get_port(adapter, portnum);
1211
1212 switch (ec) {
1213 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1214
1215 if (!port) {
1216 ehea_error("unknown portnum %x", portnum);
1217 break;
1218 }
1219
1220 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1221 if (!netif_carrier_ok(port->netdev)) {
1222 ret = ehea_sense_port_attr(port);
1223 if (ret) {
1224 ehea_error("failed resensing port "
1225 "attributes");
1226 break;
1227 }
1228
1229 if (netif_msg_link(port))
1230 ehea_info("%s: Logical port up: %dMbps "
1231 "%s Duplex",
1232 port->netdev->name,
1233 port->port_speed,
1234 port->full_duplex ==
1235 1 ? "Full" : "Half");
1236
1237 netif_carrier_on(port->netdev);
1238 netif_wake_queue(port->netdev);
1239 }
1240 } else
1241 if (netif_carrier_ok(port->netdev)) {
1242 if (netif_msg_link(port))
1243 ehea_info("%s: Logical port down",
1244 port->netdev->name);
1245 netif_carrier_off(port->netdev);
1246 netif_stop_queue(port->netdev);
1247 }
1248
1249 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1250 port->phy_link = EHEA_PHY_LINK_UP;
1251 if (netif_msg_link(port))
1252 ehea_info("%s: Physical port up",
1253 port->netdev->name);
1254 if (prop_carrier_state)
1255 netif_carrier_on(port->netdev);
1256 } else {
1257 port->phy_link = EHEA_PHY_LINK_DOWN;
1258 if (netif_msg_link(port))
1259 ehea_info("%s: Physical port down",
1260 port->netdev->name);
1261 if (prop_carrier_state)
1262 netif_carrier_off(port->netdev);
1263 }
1264
1265 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1266 ehea_info("External switch port is primary port");
1267 else
1268 ehea_info("External switch port is backup port");
1269
1270 break;
1271 case EHEA_EC_ADAPTER_MALFUNC:
1272 ehea_error("Adapter malfunction");
1273 break;
1274 case EHEA_EC_PORT_MALFUNC:
1275 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1276 netif_carrier_off(port->netdev);
1277 netif_stop_queue(port->netdev);
1278 break;
1279 default:
1280 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1281 break;
1282 }
1283 }
1284
1285 static void ehea_neq_tasklet(unsigned long data)
1286 {
1287 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1288 struct ehea_eqe *eqe;
1289 u64 event_mask;
1290
1291 eqe = ehea_poll_eq(adapter->neq);
1292 ehea_debug("eqe=%p", eqe);
1293
1294 while (eqe) {
1295 ehea_debug("*eqe=%lx", eqe->entry);
1296 ehea_parse_eqe(adapter, eqe->entry);
1297 eqe = ehea_poll_eq(adapter->neq);
1298 ehea_debug("next eqe=%p", eqe);
1299 }
1300
1301 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1302 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1303 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1304
1305 ehea_h_reset_events(adapter->handle,
1306 adapter->neq->fw_handle, event_mask);
1307 }
1308
1309 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1310 {
1311 struct ehea_adapter *adapter = param;
1312 tasklet_hi_schedule(&adapter->neq_tasklet);
1313 return IRQ_HANDLED;
1314 }
1315
1316
1317 static int ehea_fill_port_res(struct ehea_port_res *pr)
1318 {
1319 int ret;
1320 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1321
1322 ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1323 - init_attr->act_nr_rwqes_rq2
1324 - init_attr->act_nr_rwqes_rq3 - 1);
1325
1326 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1327
1328 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1329
1330 return ret;
1331 }
1332
1333 static int ehea_reg_interrupts(struct net_device *dev)
1334 {
1335 struct ehea_port *port = netdev_priv(dev);
1336 struct ehea_port_res *pr;
1337 int i, ret;
1338
1339
1340 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1341 dev->name);
1342
1343 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1344 ehea_qp_aff_irq_handler,
1345 IRQF_DISABLED, port->int_aff_name, port);
1346 if (ret) {
1347 ehea_error("failed registering irq for qp_aff_irq_handler:"
1348 "ist=%X", port->qp_eq->attr.ist1);
1349 goto out_free_qpeq;
1350 }
1351
1352 if (netif_msg_ifup(port))
1353 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1354 "registered", port->qp_eq->attr.ist1);
1355
1356
1357 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1358 pr = &port->port_res[i];
1359 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1360 "%s-queue%d", dev->name, i);
1361 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1362 ehea_recv_irq_handler,
1363 IRQF_DISABLED, pr->int_send_name,
1364 pr);
1365 if (ret) {
1366 ehea_error("failed registering irq for ehea_queue "
1367 "port_res_nr:%d, ist=%X", i,
1368 pr->eq->attr.ist1);
1369 goto out_free_req;
1370 }
1371 if (netif_msg_ifup(port))
1372 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1373 "%d registered", pr->eq->attr.ist1, i);
1374 }
1375 out:
1376 return ret;
1377
1378
1379 out_free_req:
1380 while (--i >= 0) {
1381 u32 ist = port->port_res[i].eq->attr.ist1;
1382 ibmebus_free_irq(ist, &port->port_res[i]);
1383 }
1384
1385 out_free_qpeq:
1386 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1387 i = port->num_def_qps;
1388
1389 goto out;
1390
1391 }
1392
1393 static void ehea_free_interrupts(struct net_device *dev)
1394 {
1395 struct ehea_port *port = netdev_priv(dev);
1396 struct ehea_port_res *pr;
1397 int i;
1398
1399 /* send */
1400
1401 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1402 pr = &port->port_res[i];
1403 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1404 if (netif_msg_intr(port))
1405 ehea_info("free send irq for res %d with handle 0x%X",
1406 i, pr->eq->attr.ist1);
1407 }
1408
1409 /* associated events */
1410 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1411 if (netif_msg_intr(port))
1412 ehea_info("associated event interrupt for handle 0x%X freed",
1413 port->qp_eq->attr.ist1);
1414 }
1415
1416 static int ehea_configure_port(struct ehea_port *port)
1417 {
1418 int ret, i;
1419 u64 hret, mask;
1420 struct hcp_ehea_port_cb0 *cb0;
1421
1422 ret = -ENOMEM;
1423 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1424 if (!cb0)
1425 goto out;
1426
1427 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1428 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1429 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1430 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1431 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1432 PXLY_RC_VLAN_FILTER)
1433 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1434
1435 for (i = 0; i < port->num_mcs; i++)
1436 if (use_mcs)
1437 cb0->default_qpn_arr[i] =
1438 port->port_res[i].qp->init_attr.qp_nr;
1439 else
1440 cb0->default_qpn_arr[i] =
1441 port->port_res[0].qp->init_attr.qp_nr;
1442
1443 if (netif_msg_ifup(port))
1444 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1445
1446 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1447 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1448
1449 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1450 port->logical_port_id,
1451 H_PORT_CB0, mask, cb0);
1452 ret = -EIO;
1453 if (hret != H_SUCCESS)
1454 goto out_free;
1455
1456 ret = 0;
1457
1458 out_free:
1459 free_page((unsigned long)cb0);
1460 out:
1461 return ret;
1462 }
1463
1464 int ehea_gen_smrs(struct ehea_port_res *pr)
1465 {
1466 int ret;
1467 struct ehea_adapter *adapter = pr->port->adapter;
1468
1469 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1470 if (ret)
1471 goto out;
1472
1473 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1474 if (ret)
1475 goto out_free;
1476
1477 return 0;
1478
1479 out_free:
1480 ehea_rem_mr(&pr->send_mr);
1481 out:
1482 ehea_error("Generating SMRS failed\n");
1483 return -EIO;
1484 }
1485
1486 int ehea_rem_smrs(struct ehea_port_res *pr)
1487 {
1488 if ((ehea_rem_mr(&pr->send_mr)) ||
1489 (ehea_rem_mr(&pr->recv_mr)))
1490 return -EIO;
1491 else
1492 return 0;
1493 }
1494
1495 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1496 {
1497 int arr_size = sizeof(void *) * max_q_entries;
1498
1499 q_skba->arr = vzalloc(arr_size);
1500 if (!q_skba->arr)
1501 return -ENOMEM;
1502
1503 q_skba->len = max_q_entries;
1504 q_skba->index = 0;
1505 q_skba->os_skbs = 0;
1506
1507 return 0;
1508 }
1509
1510 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1511 struct port_res_cfg *pr_cfg, int queue_token)
1512 {
1513 struct ehea_adapter *adapter = port->adapter;
1514 enum ehea_eq_type eq_type = EHEA_EQ;
1515 struct ehea_qp_init_attr *init_attr = NULL;
1516 int ret = -EIO;
1517 u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1518
1519 tx_bytes = pr->tx_bytes;
1520 tx_packets = pr->tx_packets;
1521 rx_bytes = pr->rx_bytes;
1522 rx_packets = pr->rx_packets;
1523
1524 memset(pr, 0, sizeof(struct ehea_port_res));
1525
1526 pr->tx_bytes = rx_bytes;
1527 pr->tx_packets = tx_packets;
1528 pr->rx_bytes = rx_bytes;
1529 pr->rx_packets = rx_packets;
1530
1531 pr->port = port;
1532 spin_lock_init(&pr->xmit_lock);
1533 spin_lock_init(&pr->netif_queue);
1534
1535 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1536 if (!pr->eq) {
1537 ehea_error("create_eq failed (eq)");
1538 goto out_free;
1539 }
1540
1541 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1542 pr->eq->fw_handle,
1543 port->logical_port_id);
1544 if (!pr->recv_cq) {
1545 ehea_error("create_cq failed (cq_recv)");
1546 goto out_free;
1547 }
1548
1549 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1550 pr->eq->fw_handle,
1551 port->logical_port_id);
1552 if (!pr->send_cq) {
1553 ehea_error("create_cq failed (cq_send)");
1554 goto out_free;
1555 }
1556
1557 if (netif_msg_ifup(port))
1558 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1559 pr->send_cq->attr.act_nr_of_cqes,
1560 pr->recv_cq->attr.act_nr_of_cqes);
1561
1562 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1563 if (!init_attr) {
1564 ret = -ENOMEM;
1565 ehea_error("no mem for ehea_qp_init_attr");
1566 goto out_free;
1567 }
1568
1569 init_attr->low_lat_rq1 = 1;
1570 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1571 init_attr->rq_count = 3;
1572 init_attr->qp_token = queue_token;
1573 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1574 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1575 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1576 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1577 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1578 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1579 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1580 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1581 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1582 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1583 init_attr->port_nr = port->logical_port_id;
1584 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1585 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1586 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1587
1588 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1589 if (!pr->qp) {
1590 ehea_error("create_qp failed");
1591 ret = -EIO;
1592 goto out_free;
1593 }
1594
1595 if (netif_msg_ifup(port))
1596 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1597 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1598 init_attr->act_nr_send_wqes,
1599 init_attr->act_nr_rwqes_rq1,
1600 init_attr->act_nr_rwqes_rq2,
1601 init_attr->act_nr_rwqes_rq3);
1602
1603 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1604
1605 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1606 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1607 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1608 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1609 if (ret)
1610 goto out_free;
1611
1612 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1613 if (ehea_gen_smrs(pr) != 0) {
1614 ret = -EIO;
1615 goto out_free;
1616 }
1617
1618 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1619
1620 kfree(init_attr);
1621
1622 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1623
1624 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1625 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1626 pr->lro_mgr.lro_arr = pr->lro_desc;
1627 pr->lro_mgr.get_skb_header = get_skb_hdr;
1628 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1629 pr->lro_mgr.dev = port->netdev;
1630 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1631 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1632
1633 ret = 0;
1634 goto out;
1635
1636 out_free:
1637 kfree(init_attr);
1638 vfree(pr->sq_skba.arr);
1639 vfree(pr->rq1_skba.arr);
1640 vfree(pr->rq2_skba.arr);
1641 vfree(pr->rq3_skba.arr);
1642 ehea_destroy_qp(pr->qp);
1643 ehea_destroy_cq(pr->send_cq);
1644 ehea_destroy_cq(pr->recv_cq);
1645 ehea_destroy_eq(pr->eq);
1646 out:
1647 return ret;
1648 }
1649
1650 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1651 {
1652 int ret, i;
1653
1654 if (pr->qp)
1655 netif_napi_del(&pr->napi);
1656
1657 ret = ehea_destroy_qp(pr->qp);
1658
1659 if (!ret) {
1660 ehea_destroy_cq(pr->send_cq);
1661 ehea_destroy_cq(pr->recv_cq);
1662 ehea_destroy_eq(pr->eq);
1663
1664 for (i = 0; i < pr->rq1_skba.len; i++)
1665 if (pr->rq1_skba.arr[i])
1666 dev_kfree_skb(pr->rq1_skba.arr[i]);
1667
1668 for (i = 0; i < pr->rq2_skba.len; i++)
1669 if (pr->rq2_skba.arr[i])
1670 dev_kfree_skb(pr->rq2_skba.arr[i]);
1671
1672 for (i = 0; i < pr->rq3_skba.len; i++)
1673 if (pr->rq3_skba.arr[i])
1674 dev_kfree_skb(pr->rq3_skba.arr[i]);
1675
1676 for (i = 0; i < pr->sq_skba.len; i++)
1677 if (pr->sq_skba.arr[i])
1678 dev_kfree_skb(pr->sq_skba.arr[i]);
1679
1680 vfree(pr->rq1_skba.arr);
1681 vfree(pr->rq2_skba.arr);
1682 vfree(pr->rq3_skba.arr);
1683 vfree(pr->sq_skba.arr);
1684 ret = ehea_rem_smrs(pr);
1685 }
1686 return ret;
1687 }
1688
1689 /*
1690 * The write_* functions store information in swqe which is used by
1691 * the hardware to calculate the ip/tcp/udp checksum
1692 */
1693
1694 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1695 const struct sk_buff *skb)
1696 {
1697 swqe->ip_start = skb_network_offset(skb);
1698 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1699 }
1700
1701 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1702 const struct sk_buff *skb)
1703 {
1704 swqe->tcp_offset =
1705 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1706
1707 swqe->tcp_end = (u16)skb->len - 1;
1708 }
1709
1710 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1711 const struct sk_buff *skb)
1712 {
1713 swqe->tcp_offset =
1714 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1715
1716 swqe->tcp_end = (u16)skb->len - 1;
1717 }
1718
1719
1720 static void write_swqe2_TSO(struct sk_buff *skb,
1721 struct ehea_swqe *swqe, u32 lkey)
1722 {
1723 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1724 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1725 int skb_data_size = skb_headlen(skb);
1726 int headersize;
1727
1728 /* Packet is TCP with TSO enabled */
1729 swqe->tx_control |= EHEA_SWQE_TSO;
1730 swqe->mss = skb_shinfo(skb)->gso_size;
1731 /* copy only eth/ip/tcp headers to immediate data and
1732 * the rest of skb->data to sg1entry
1733 */
1734 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1735
1736 skb_data_size = skb_headlen(skb);
1737
1738 if (skb_data_size >= headersize) {
1739 /* copy immediate data */
1740 skb_copy_from_linear_data(skb, imm_data, headersize);
1741 swqe->immediate_data_length = headersize;
1742
1743 if (skb_data_size > headersize) {
1744 /* set sg1entry data */
1745 sg1entry->l_key = lkey;
1746 sg1entry->len = skb_data_size - headersize;
1747 sg1entry->vaddr =
1748 ehea_map_vaddr(skb->data + headersize);
1749 swqe->descriptors++;
1750 }
1751 } else
1752 ehea_error("cannot handle fragmented headers");
1753 }
1754
1755 static void write_swqe2_nonTSO(struct sk_buff *skb,
1756 struct ehea_swqe *swqe, u32 lkey)
1757 {
1758 int skb_data_size = skb_headlen(skb);
1759 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1760 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1761
1762 /* Packet is any nonTSO type
1763 *
1764 * Copy as much as possible skb->data to immediate data and
1765 * the rest to sg1entry
1766 */
1767 if (skb_data_size >= SWQE2_MAX_IMM) {
1768 /* copy immediate data */
1769 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1770
1771 swqe->immediate_data_length = SWQE2_MAX_IMM;
1772
1773 if (skb_data_size > SWQE2_MAX_IMM) {
1774 /* copy sg1entry data */
1775 sg1entry->l_key = lkey;
1776 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1777 sg1entry->vaddr =
1778 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1779 swqe->descriptors++;
1780 }
1781 } else {
1782 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1783 swqe->immediate_data_length = skb_data_size;
1784 }
1785 }
1786
1787 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1788 struct ehea_swqe *swqe, u32 lkey)
1789 {
1790 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1791 skb_frag_t *frag;
1792 int nfrags, sg1entry_contains_frag_data, i;
1793
1794 nfrags = skb_shinfo(skb)->nr_frags;
1795 sg1entry = &swqe->u.immdata_desc.sg_entry;
1796 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1797 swqe->descriptors = 0;
1798 sg1entry_contains_frag_data = 0;
1799
1800 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1801 write_swqe2_TSO(skb, swqe, lkey);
1802 else
1803 write_swqe2_nonTSO(skb, swqe, lkey);
1804
1805 /* write descriptors */
1806 if (nfrags > 0) {
1807 if (swqe->descriptors == 0) {
1808 /* sg1entry not yet used */
1809 frag = &skb_shinfo(skb)->frags[0];
1810
1811 /* copy sg1entry data */
1812 sg1entry->l_key = lkey;
1813 sg1entry->len = frag->size;
1814 sg1entry->vaddr =
1815 ehea_map_vaddr(page_address(frag->page)
1816 + frag->page_offset);
1817 swqe->descriptors++;
1818 sg1entry_contains_frag_data = 1;
1819 }
1820
1821 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1822
1823 frag = &skb_shinfo(skb)->frags[i];
1824 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1825
1826 sgentry->l_key = lkey;
1827 sgentry->len = frag->size;
1828 sgentry->vaddr =
1829 ehea_map_vaddr(page_address(frag->page)
1830 + frag->page_offset);
1831 swqe->descriptors++;
1832 }
1833 }
1834 }
1835
1836 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1837 {
1838 int ret = 0;
1839 u64 hret;
1840 u8 reg_type;
1841
1842 /* De/Register untagged packets */
1843 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1844 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1845 port->logical_port_id,
1846 reg_type, port->mac_addr, 0, hcallid);
1847 if (hret != H_SUCCESS) {
1848 ehea_error("%sregistering bc address failed (tagged)",
1849 hcallid == H_REG_BCMC ? "" : "de");
1850 ret = -EIO;
1851 goto out_herr;
1852 }
1853
1854 /* De/Register VLAN packets */
1855 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1856 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1857 port->logical_port_id,
1858 reg_type, port->mac_addr, 0, hcallid);
1859 if (hret != H_SUCCESS) {
1860 ehea_error("%sregistering bc address failed (vlan)",
1861 hcallid == H_REG_BCMC ? "" : "de");
1862 ret = -EIO;
1863 }
1864 out_herr:
1865 return ret;
1866 }
1867
1868 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1869 {
1870 struct ehea_port *port = netdev_priv(dev);
1871 struct sockaddr *mac_addr = sa;
1872 struct hcp_ehea_port_cb0 *cb0;
1873 int ret;
1874 u64 hret;
1875
1876 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1877 ret = -EADDRNOTAVAIL;
1878 goto out;
1879 }
1880
1881 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1882 if (!cb0) {
1883 ehea_error("no mem for cb0");
1884 ret = -ENOMEM;
1885 goto out;
1886 }
1887
1888 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1889
1890 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1891
1892 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1893 port->logical_port_id, H_PORT_CB0,
1894 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1895 if (hret != H_SUCCESS) {
1896 ret = -EIO;
1897 goto out_free;
1898 }
1899
1900 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1901
1902 /* Deregister old MAC in pHYP */
1903 if (port->state == EHEA_PORT_UP) {
1904 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1905 if (ret)
1906 goto out_upregs;
1907 }
1908
1909 port->mac_addr = cb0->port_mac_addr << 16;
1910
1911 /* Register new MAC in pHYP */
1912 if (port->state == EHEA_PORT_UP) {
1913 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1914 if (ret)
1915 goto out_upregs;
1916 }
1917
1918 ret = 0;
1919
1920 out_upregs:
1921 ehea_update_bcmc_registrations();
1922 out_free:
1923 free_page((unsigned long)cb0);
1924 out:
1925 return ret;
1926 }
1927
1928 static void ehea_promiscuous_error(u64 hret, int enable)
1929 {
1930 if (hret == H_AUTHORITY)
1931 ehea_info("Hypervisor denied %sabling promiscuous mode",
1932 enable == 1 ? "en" : "dis");
1933 else
1934 ehea_error("failed %sabling promiscuous mode",
1935 enable == 1 ? "en" : "dis");
1936 }
1937
1938 static void ehea_promiscuous(struct net_device *dev, int enable)
1939 {
1940 struct ehea_port *port = netdev_priv(dev);
1941 struct hcp_ehea_port_cb7 *cb7;
1942 u64 hret;
1943
1944 if (enable == port->promisc)
1945 return;
1946
1947 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1948 if (!cb7) {
1949 ehea_error("no mem for cb7");
1950 goto out;
1951 }
1952
1953 /* Modify Pxs_DUCQPN in CB7 */
1954 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1955
1956 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1957 port->logical_port_id,
1958 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1959 if (hret) {
1960 ehea_promiscuous_error(hret, enable);
1961 goto out;
1962 }
1963
1964 port->promisc = enable;
1965 out:
1966 free_page((unsigned long)cb7);
1967 }
1968
1969 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1970 u32 hcallid)
1971 {
1972 u64 hret;
1973 u8 reg_type;
1974
1975 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1976 | EHEA_BCMC_UNTAGGED;
1977
1978 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1979 port->logical_port_id,
1980 reg_type, mc_mac_addr, 0, hcallid);
1981 if (hret)
1982 goto out;
1983
1984 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1985 | EHEA_BCMC_VLANID_ALL;
1986
1987 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1988 port->logical_port_id,
1989 reg_type, mc_mac_addr, 0, hcallid);
1990 out:
1991 return hret;
1992 }
1993
1994 static int ehea_drop_multicast_list(struct net_device *dev)
1995 {
1996 struct ehea_port *port = netdev_priv(dev);
1997 struct ehea_mc_list *mc_entry = port->mc_list;
1998 struct list_head *pos;
1999 struct list_head *temp;
2000 int ret = 0;
2001 u64 hret;
2002
2003 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2004 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2005
2006 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2007 H_DEREG_BCMC);
2008 if (hret) {
2009 ehea_error("failed deregistering mcast MAC");
2010 ret = -EIO;
2011 }
2012
2013 list_del(pos);
2014 kfree(mc_entry);
2015 }
2016 return ret;
2017 }
2018
2019 static void ehea_allmulti(struct net_device *dev, int enable)
2020 {
2021 struct ehea_port *port = netdev_priv(dev);
2022 u64 hret;
2023
2024 if (!port->allmulti) {
2025 if (enable) {
2026 /* Enable ALLMULTI */
2027 ehea_drop_multicast_list(dev);
2028 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2029 if (!hret)
2030 port->allmulti = 1;
2031 else
2032 ehea_error("failed enabling IFF_ALLMULTI");
2033 }
2034 } else
2035 if (!enable) {
2036 /* Disable ALLMULTI */
2037 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2038 if (!hret)
2039 port->allmulti = 0;
2040 else
2041 ehea_error("failed disabling IFF_ALLMULTI");
2042 }
2043 }
2044
2045 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2046 {
2047 struct ehea_mc_list *ehea_mcl_entry;
2048 u64 hret;
2049
2050 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2051 if (!ehea_mcl_entry) {
2052 ehea_error("no mem for mcl_entry");
2053 return;
2054 }
2055
2056 INIT_LIST_HEAD(&ehea_mcl_entry->list);
2057
2058 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2059
2060 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2061 H_REG_BCMC);
2062 if (!hret)
2063 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2064 else {
2065 ehea_error("failed registering mcast MAC");
2066 kfree(ehea_mcl_entry);
2067 }
2068 }
2069
2070 static void ehea_set_multicast_list(struct net_device *dev)
2071 {
2072 struct ehea_port *port = netdev_priv(dev);
2073 struct netdev_hw_addr *ha;
2074 int ret;
2075
2076 if (dev->flags & IFF_PROMISC) {
2077 ehea_promiscuous(dev, 1);
2078 return;
2079 }
2080 ehea_promiscuous(dev, 0);
2081
2082 if (dev->flags & IFF_ALLMULTI) {
2083 ehea_allmulti(dev, 1);
2084 goto out;
2085 }
2086 ehea_allmulti(dev, 0);
2087
2088 if (!netdev_mc_empty(dev)) {
2089 ret = ehea_drop_multicast_list(dev);
2090 if (ret) {
2091 /* Dropping the current multicast list failed.
2092 * Enabling ALL_MULTI is the best we can do.
2093 */
2094 ehea_allmulti(dev, 1);
2095 }
2096
2097 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2098 ehea_info("Mcast registration limit reached (0x%llx). "
2099 "Use ALLMULTI!",
2100 port->adapter->max_mc_mac);
2101 goto out;
2102 }
2103
2104 netdev_for_each_mc_addr(ha, dev)
2105 ehea_add_multicast_entry(port, ha->addr);
2106
2107 }
2108 out:
2109 ehea_update_bcmc_registrations();
2110 }
2111
2112 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2113 {
2114 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2115 return -EINVAL;
2116 dev->mtu = new_mtu;
2117 return 0;
2118 }
2119
2120 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2121 struct ehea_swqe *swqe, u32 lkey)
2122 {
2123 if (skb->protocol == htons(ETH_P_IP)) {
2124 const struct iphdr *iph = ip_hdr(skb);
2125
2126 /* IPv4 */
2127 swqe->tx_control |= EHEA_SWQE_CRC
2128 | EHEA_SWQE_IP_CHECKSUM
2129 | EHEA_SWQE_TCP_CHECKSUM
2130 | EHEA_SWQE_IMM_DATA_PRESENT
2131 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2132
2133 write_ip_start_end(swqe, skb);
2134
2135 if (iph->protocol == IPPROTO_UDP) {
2136 if ((iph->frag_off & IP_MF) ||
2137 (iph->frag_off & IP_OFFSET))
2138 /* IP fragment, so don't change cs */
2139 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2140 else
2141 write_udp_offset_end(swqe, skb);
2142 } else if (iph->protocol == IPPROTO_TCP) {
2143 write_tcp_offset_end(swqe, skb);
2144 }
2145
2146 /* icmp (big data) and ip segmentation packets (all other ip
2147 packets) do not require any special handling */
2148
2149 } else {
2150 /* Other Ethernet Protocol */
2151 swqe->tx_control |= EHEA_SWQE_CRC
2152 | EHEA_SWQE_IMM_DATA_PRESENT
2153 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2154 }
2155
2156 write_swqe2_data(skb, dev, swqe, lkey);
2157 }
2158
2159 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2160 struct ehea_swqe *swqe)
2161 {
2162 int nfrags = skb_shinfo(skb)->nr_frags;
2163 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2164 skb_frag_t *frag;
2165 int i;
2166
2167 if (skb->protocol == htons(ETH_P_IP)) {
2168 const struct iphdr *iph = ip_hdr(skb);
2169
2170 /* IPv4 */
2171 write_ip_start_end(swqe, skb);
2172
2173 if (iph->protocol == IPPROTO_TCP) {
2174 swqe->tx_control |= EHEA_SWQE_CRC
2175 | EHEA_SWQE_IP_CHECKSUM
2176 | EHEA_SWQE_TCP_CHECKSUM
2177 | EHEA_SWQE_IMM_DATA_PRESENT;
2178
2179 write_tcp_offset_end(swqe, skb);
2180
2181 } else if (iph->protocol == IPPROTO_UDP) {
2182 if ((iph->frag_off & IP_MF) ||
2183 (iph->frag_off & IP_OFFSET))
2184 /* IP fragment, so don't change cs */
2185 swqe->tx_control |= EHEA_SWQE_CRC
2186 | EHEA_SWQE_IMM_DATA_PRESENT;
2187 else {
2188 swqe->tx_control |= EHEA_SWQE_CRC
2189 | EHEA_SWQE_IP_CHECKSUM
2190 | EHEA_SWQE_TCP_CHECKSUM
2191 | EHEA_SWQE_IMM_DATA_PRESENT;
2192
2193 write_udp_offset_end(swqe, skb);
2194 }
2195 } else {
2196 /* icmp (big data) and
2197 ip segmentation packets (all other ip packets) */
2198 swqe->tx_control |= EHEA_SWQE_CRC
2199 | EHEA_SWQE_IP_CHECKSUM
2200 | EHEA_SWQE_IMM_DATA_PRESENT;
2201 }
2202 } else {
2203 /* Other Ethernet Protocol */
2204 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2205 }
2206 /* copy (immediate) data */
2207 if (nfrags == 0) {
2208 /* data is in a single piece */
2209 skb_copy_from_linear_data(skb, imm_data, skb->len);
2210 } else {
2211 /* first copy data from the skb->data buffer ... */
2212 skb_copy_from_linear_data(skb, imm_data,
2213 skb_headlen(skb));
2214 imm_data += skb_headlen(skb);
2215
2216 /* ... then copy data from the fragments */
2217 for (i = 0; i < nfrags; i++) {
2218 frag = &skb_shinfo(skb)->frags[i];
2219 memcpy(imm_data,
2220 page_address(frag->page) + frag->page_offset,
2221 frag->size);
2222 imm_data += frag->size;
2223 }
2224 }
2225 swqe->immediate_data_length = skb->len;
2226 dev_kfree_skb(skb);
2227 }
2228
2229 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2230 {
2231 struct tcphdr *tcp;
2232 u32 tmp;
2233
2234 if ((skb->protocol == htons(ETH_P_IP)) &&
2235 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2236 tcp = (struct tcphdr *)(skb_network_header(skb) +
2237 (ip_hdr(skb)->ihl * 4));
2238 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2239 tmp += ip_hdr(skb)->daddr % 31;
2240 return tmp % num_qps;
2241 } else
2242 return 0;
2243 }
2244
2245 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2246 {
2247 struct ehea_port *port = netdev_priv(dev);
2248 struct ehea_swqe *swqe;
2249 unsigned long flags;
2250 u32 lkey;
2251 int swqe_index;
2252 struct ehea_port_res *pr;
2253
2254 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2255
2256 if (!spin_trylock(&pr->xmit_lock))
2257 return NETDEV_TX_BUSY;
2258
2259 if (pr->queue_stopped) {
2260 spin_unlock(&pr->xmit_lock);
2261 return NETDEV_TX_BUSY;
2262 }
2263
2264 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2265 memset(swqe, 0, SWQE_HEADER_SIZE);
2266 atomic_dec(&pr->swqe_avail);
2267
2268 if (vlan_tx_tag_present(skb)) {
2269 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2270 swqe->vlan_tag = vlan_tx_tag_get(skb);
2271 }
2272
2273 pr->tx_packets++;
2274 pr->tx_bytes += skb->len;
2275
2276 if (skb->len <= SWQE3_MAX_IMM) {
2277 u32 sig_iv = port->sig_comp_iv;
2278 u32 swqe_num = pr->swqe_id_counter;
2279 ehea_xmit3(skb, dev, swqe);
2280 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2281 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2282 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2283 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2284 sig_iv);
2285 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2286 pr->swqe_ll_count = 0;
2287 } else
2288 pr->swqe_ll_count += 1;
2289 } else {
2290 swqe->wr_id =
2291 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2292 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2293 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2294 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2295 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2296
2297 pr->sq_skba.index++;
2298 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2299
2300 lkey = pr->send_mr.lkey;
2301 ehea_xmit2(skb, dev, swqe, lkey);
2302 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2303 }
2304 pr->swqe_id_counter += 1;
2305
2306 if (netif_msg_tx_queued(port)) {
2307 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2308 ehea_dump(swqe, 512, "swqe");
2309 }
2310
2311 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2312 netif_stop_queue(dev);
2313 swqe->tx_control |= EHEA_SWQE_PURGE;
2314 }
2315
2316 ehea_post_swqe(pr->qp, swqe);
2317
2318 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2319 spin_lock_irqsave(&pr->netif_queue, flags);
2320 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2321 pr->p_stats.queue_stopped++;
2322 netif_stop_queue(dev);
2323 pr->queue_stopped = 1;
2324 }
2325 spin_unlock_irqrestore(&pr->netif_queue, flags);
2326 }
2327 dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2328 spin_unlock(&pr->xmit_lock);
2329
2330 return NETDEV_TX_OK;
2331 }
2332
2333 static void ehea_vlan_rx_register(struct net_device *dev,
2334 struct vlan_group *grp)
2335 {
2336 struct ehea_port *port = netdev_priv(dev);
2337 struct ehea_adapter *adapter = port->adapter;
2338 struct hcp_ehea_port_cb1 *cb1;
2339 u64 hret;
2340
2341 port->vgrp = grp;
2342
2343 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2344 if (!cb1) {
2345 ehea_error("no mem for cb1");
2346 goto out;
2347 }
2348
2349 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2350 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2351 if (hret != H_SUCCESS)
2352 ehea_error("modify_ehea_port failed");
2353
2354 free_page((unsigned long)cb1);
2355 out:
2356 return;
2357 }
2358
2359 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2360 {
2361 struct ehea_port *port = netdev_priv(dev);
2362 struct ehea_adapter *adapter = port->adapter;
2363 struct hcp_ehea_port_cb1 *cb1;
2364 int index;
2365 u64 hret;
2366
2367 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2368 if (!cb1) {
2369 ehea_error("no mem for cb1");
2370 goto out;
2371 }
2372
2373 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2374 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2375 if (hret != H_SUCCESS) {
2376 ehea_error("query_ehea_port failed");
2377 goto out;
2378 }
2379
2380 index = (vid / 64);
2381 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2382
2383 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2384 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2385 if (hret != H_SUCCESS)
2386 ehea_error("modify_ehea_port failed");
2387 out:
2388 free_page((unsigned long)cb1);
2389 return;
2390 }
2391
2392 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2393 {
2394 struct ehea_port *port = netdev_priv(dev);
2395 struct ehea_adapter *adapter = port->adapter;
2396 struct hcp_ehea_port_cb1 *cb1;
2397 int index;
2398 u64 hret;
2399
2400 vlan_group_set_device(port->vgrp, vid, NULL);
2401
2402 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2403 if (!cb1) {
2404 ehea_error("no mem for cb1");
2405 goto out;
2406 }
2407
2408 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2409 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2410 if (hret != H_SUCCESS) {
2411 ehea_error("query_ehea_port failed");
2412 goto out;
2413 }
2414
2415 index = (vid / 64);
2416 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2417
2418 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2419 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2420 if (hret != H_SUCCESS)
2421 ehea_error("modify_ehea_port failed");
2422 out:
2423 free_page((unsigned long)cb1);
2424 }
2425
2426 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2427 {
2428 int ret = -EIO;
2429 u64 hret;
2430 u16 dummy16 = 0;
2431 u64 dummy64 = 0;
2432 struct hcp_modify_qp_cb0 *cb0;
2433
2434 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2435 if (!cb0) {
2436 ret = -ENOMEM;
2437 goto out;
2438 }
2439
2440 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2441 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2442 if (hret != H_SUCCESS) {
2443 ehea_error("query_ehea_qp failed (1)");
2444 goto out;
2445 }
2446
2447 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2448 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2449 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2450 &dummy64, &dummy64, &dummy16, &dummy16);
2451 if (hret != H_SUCCESS) {
2452 ehea_error("modify_ehea_qp failed (1)");
2453 goto out;
2454 }
2455
2456 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2457 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2458 if (hret != H_SUCCESS) {
2459 ehea_error("query_ehea_qp failed (2)");
2460 goto out;
2461 }
2462
2463 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2464 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2465 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2466 &dummy64, &dummy64, &dummy16, &dummy16);
2467 if (hret != H_SUCCESS) {
2468 ehea_error("modify_ehea_qp failed (2)");
2469 goto out;
2470 }
2471
2472 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2473 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2474 if (hret != H_SUCCESS) {
2475 ehea_error("query_ehea_qp failed (3)");
2476 goto out;
2477 }
2478
2479 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2480 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2481 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2482 &dummy64, &dummy64, &dummy16, &dummy16);
2483 if (hret != H_SUCCESS) {
2484 ehea_error("modify_ehea_qp failed (3)");
2485 goto out;
2486 }
2487
2488 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2489 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2490 if (hret != H_SUCCESS) {
2491 ehea_error("query_ehea_qp failed (4)");
2492 goto out;
2493 }
2494
2495 ret = 0;
2496 out:
2497 free_page((unsigned long)cb0);
2498 return ret;
2499 }
2500
2501 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2502 int add_tx_qps)
2503 {
2504 int ret, i;
2505 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2506 enum ehea_eq_type eq_type = EHEA_EQ;
2507
2508 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2509 EHEA_MAX_ENTRIES_EQ, 1);
2510 if (!port->qp_eq) {
2511 ret = -EINVAL;
2512 ehea_error("ehea_create_eq failed (qp_eq)");
2513 goto out_kill_eq;
2514 }
2515
2516 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2517 pr_cfg.max_entries_scq = sq_entries * 2;
2518 pr_cfg.max_entries_sq = sq_entries;
2519 pr_cfg.max_entries_rq1 = rq1_entries;
2520 pr_cfg.max_entries_rq2 = rq2_entries;
2521 pr_cfg.max_entries_rq3 = rq3_entries;
2522
2523 pr_cfg_small_rx.max_entries_rcq = 1;
2524 pr_cfg_small_rx.max_entries_scq = sq_entries;
2525 pr_cfg_small_rx.max_entries_sq = sq_entries;
2526 pr_cfg_small_rx.max_entries_rq1 = 1;
2527 pr_cfg_small_rx.max_entries_rq2 = 1;
2528 pr_cfg_small_rx.max_entries_rq3 = 1;
2529
2530 for (i = 0; i < def_qps; i++) {
2531 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2532 if (ret)
2533 goto out_clean_pr;
2534 }
2535 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2536 ret = ehea_init_port_res(port, &port->port_res[i],
2537 &pr_cfg_small_rx, i);
2538 if (ret)
2539 goto out_clean_pr;
2540 }
2541
2542 return 0;
2543
2544 out_clean_pr:
2545 while (--i >= 0)
2546 ehea_clean_portres(port, &port->port_res[i]);
2547
2548 out_kill_eq:
2549 ehea_destroy_eq(port->qp_eq);
2550 return ret;
2551 }
2552
2553 static int ehea_clean_all_portres(struct ehea_port *port)
2554 {
2555 int ret = 0;
2556 int i;
2557
2558 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2559 ret |= ehea_clean_portres(port, &port->port_res[i]);
2560
2561 ret |= ehea_destroy_eq(port->qp_eq);
2562
2563 return ret;
2564 }
2565
2566 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2567 {
2568 if (adapter->active_ports)
2569 return;
2570
2571 ehea_rem_mr(&adapter->mr);
2572 }
2573
2574 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2575 {
2576 if (adapter->active_ports)
2577 return 0;
2578
2579 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2580 }
2581
2582 static int ehea_up(struct net_device *dev)
2583 {
2584 int ret, i;
2585 struct ehea_port *port = netdev_priv(dev);
2586
2587 if (port->state == EHEA_PORT_UP)
2588 return 0;
2589
2590 ret = ehea_port_res_setup(port, port->num_def_qps,
2591 port->num_add_tx_qps);
2592 if (ret) {
2593 ehea_error("port_res_failed");
2594 goto out;
2595 }
2596
2597 /* Set default QP for this port */
2598 ret = ehea_configure_port(port);
2599 if (ret) {
2600 ehea_error("ehea_configure_port failed. ret:%d", ret);
2601 goto out_clean_pr;
2602 }
2603
2604 ret = ehea_reg_interrupts(dev);
2605 if (ret) {
2606 ehea_error("reg_interrupts failed. ret:%d", ret);
2607 goto out_clean_pr;
2608 }
2609
2610 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2611 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2612 if (ret) {
2613 ehea_error("activate_qp failed");
2614 goto out_free_irqs;
2615 }
2616 }
2617
2618 for (i = 0; i < port->num_def_qps; i++) {
2619 ret = ehea_fill_port_res(&port->port_res[i]);
2620 if (ret) {
2621 ehea_error("out_free_irqs");
2622 goto out_free_irqs;
2623 }
2624 }
2625
2626 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2627 if (ret) {
2628 ret = -EIO;
2629 goto out_free_irqs;
2630 }
2631
2632 port->state = EHEA_PORT_UP;
2633
2634 ret = 0;
2635 goto out;
2636
2637 out_free_irqs:
2638 ehea_free_interrupts(dev);
2639
2640 out_clean_pr:
2641 ehea_clean_all_portres(port);
2642 out:
2643 if (ret)
2644 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2645
2646 ehea_update_bcmc_registrations();
2647 ehea_update_firmware_handles();
2648
2649 return ret;
2650 }
2651
2652 static void port_napi_disable(struct ehea_port *port)
2653 {
2654 int i;
2655
2656 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2657 napi_disable(&port->port_res[i].napi);
2658 }
2659
2660 static void port_napi_enable(struct ehea_port *port)
2661 {
2662 int i;
2663
2664 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2665 napi_enable(&port->port_res[i].napi);
2666 }
2667
2668 static int ehea_open(struct net_device *dev)
2669 {
2670 int ret;
2671 struct ehea_port *port = netdev_priv(dev);
2672
2673 mutex_lock(&port->port_lock);
2674
2675 if (netif_msg_ifup(port))
2676 ehea_info("enabling port %s", dev->name);
2677
2678 ret = ehea_up(dev);
2679 if (!ret) {
2680 port_napi_enable(port);
2681 netif_start_queue(dev);
2682 }
2683
2684 init_waitqueue_head(&port->swqe_avail_wq);
2685 init_waitqueue_head(&port->restart_wq);
2686
2687 mutex_unlock(&port->port_lock);
2688
2689 return ret;
2690 }
2691
2692 static int ehea_down(struct net_device *dev)
2693 {
2694 int ret;
2695 struct ehea_port *port = netdev_priv(dev);
2696
2697 if (port->state == EHEA_PORT_DOWN)
2698 return 0;
2699
2700 ehea_drop_multicast_list(dev);
2701 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2702
2703 ehea_free_interrupts(dev);
2704
2705 port->state = EHEA_PORT_DOWN;
2706
2707 ehea_update_bcmc_registrations();
2708
2709 ret = ehea_clean_all_portres(port);
2710 if (ret)
2711 ehea_info("Failed freeing resources for %s. ret=%i",
2712 dev->name, ret);
2713
2714 ehea_update_firmware_handles();
2715
2716 return ret;
2717 }
2718
2719 static int ehea_stop(struct net_device *dev)
2720 {
2721 int ret;
2722 struct ehea_port *port = netdev_priv(dev);
2723
2724 if (netif_msg_ifdown(port))
2725 ehea_info("disabling port %s", dev->name);
2726
2727 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2728 cancel_work_sync(&port->reset_task);
2729 mutex_lock(&port->port_lock);
2730 netif_stop_queue(dev);
2731 port_napi_disable(port);
2732 ret = ehea_down(dev);
2733 mutex_unlock(&port->port_lock);
2734 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2735 return ret;
2736 }
2737
2738 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2739 {
2740 struct ehea_qp qp = *orig_qp;
2741 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2742 struct ehea_swqe *swqe;
2743 int wqe_index;
2744 int i;
2745
2746 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2747 swqe = ehea_get_swqe(&qp, &wqe_index);
2748 swqe->tx_control |= EHEA_SWQE_PURGE;
2749 }
2750 }
2751
2752 static void ehea_flush_sq(struct ehea_port *port)
2753 {
2754 int i;
2755
2756 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2757 struct ehea_port_res *pr = &port->port_res[i];
2758 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2759 int ret;
2760
2761 ret = wait_event_timeout(port->swqe_avail_wq,
2762 atomic_read(&pr->swqe_avail) >= swqe_max,
2763 msecs_to_jiffies(100));
2764
2765 if (!ret) {
2766 ehea_error("WARNING: sq not flushed completely");
2767 break;
2768 }
2769 }
2770 }
2771
2772 int ehea_stop_qps(struct net_device *dev)
2773 {
2774 struct ehea_port *port = netdev_priv(dev);
2775 struct ehea_adapter *adapter = port->adapter;
2776 struct hcp_modify_qp_cb0 *cb0;
2777 int ret = -EIO;
2778 int dret;
2779 int i;
2780 u64 hret;
2781 u64 dummy64 = 0;
2782 u16 dummy16 = 0;
2783
2784 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2785 if (!cb0) {
2786 ret = -ENOMEM;
2787 goto out;
2788 }
2789
2790 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2791 struct ehea_port_res *pr = &port->port_res[i];
2792 struct ehea_qp *qp = pr->qp;
2793
2794 /* Purge send queue */
2795 ehea_purge_sq(qp);
2796
2797 /* Disable queue pair */
2798 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2799 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2800 cb0);
2801 if (hret != H_SUCCESS) {
2802 ehea_error("query_ehea_qp failed (1)");
2803 goto out;
2804 }
2805
2806 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2807 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2808
2809 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2810 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2811 1), cb0, &dummy64,
2812 &dummy64, &dummy16, &dummy16);
2813 if (hret != H_SUCCESS) {
2814 ehea_error("modify_ehea_qp failed (1)");
2815 goto out;
2816 }
2817
2818 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2819 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2820 cb0);
2821 if (hret != H_SUCCESS) {
2822 ehea_error("query_ehea_qp failed (2)");
2823 goto out;
2824 }
2825
2826 /* deregister shared memory regions */
2827 dret = ehea_rem_smrs(pr);
2828 if (dret) {
2829 ehea_error("unreg shared memory region failed");
2830 goto out;
2831 }
2832 }
2833
2834 ret = 0;
2835 out:
2836 free_page((unsigned long)cb0);
2837
2838 return ret;
2839 }
2840
2841 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2842 {
2843 struct ehea_qp qp = *orig_qp;
2844 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2845 struct ehea_rwqe *rwqe;
2846 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2847 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2848 struct sk_buff *skb;
2849 u32 lkey = pr->recv_mr.lkey;
2850
2851
2852 int i;
2853 int index;
2854
2855 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2856 rwqe = ehea_get_next_rwqe(&qp, 2);
2857 rwqe->sg_list[0].l_key = lkey;
2858 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2859 skb = skba_rq2[index];
2860 if (skb)
2861 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2862 }
2863
2864 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2865 rwqe = ehea_get_next_rwqe(&qp, 3);
2866 rwqe->sg_list[0].l_key = lkey;
2867 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2868 skb = skba_rq3[index];
2869 if (skb)
2870 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2871 }
2872 }
2873
2874 int ehea_restart_qps(struct net_device *dev)
2875 {
2876 struct ehea_port *port = netdev_priv(dev);
2877 struct ehea_adapter *adapter = port->adapter;
2878 int ret = 0;
2879 int i;
2880
2881 struct hcp_modify_qp_cb0 *cb0;
2882 u64 hret;
2883 u64 dummy64 = 0;
2884 u16 dummy16 = 0;
2885
2886 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2887 if (!cb0) {
2888 ret = -ENOMEM;
2889 goto out;
2890 }
2891
2892 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2893 struct ehea_port_res *pr = &port->port_res[i];
2894 struct ehea_qp *qp = pr->qp;
2895
2896 ret = ehea_gen_smrs(pr);
2897 if (ret) {
2898 ehea_error("creation of shared memory regions failed");
2899 goto out;
2900 }
2901
2902 ehea_update_rqs(qp, pr);
2903
2904 /* Enable queue pair */
2905 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2906 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2907 cb0);
2908 if (hret != H_SUCCESS) {
2909 ehea_error("query_ehea_qp failed (1)");
2910 goto out;
2911 }
2912
2913 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2914 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2915
2916 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2917 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2918 1), cb0, &dummy64,
2919 &dummy64, &dummy16, &dummy16);
2920 if (hret != H_SUCCESS) {
2921 ehea_error("modify_ehea_qp failed (1)");
2922 goto out;
2923 }
2924
2925 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2926 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2927 cb0);
2928 if (hret != H_SUCCESS) {
2929 ehea_error("query_ehea_qp failed (2)");
2930 goto out;
2931 }
2932
2933 /* refill entire queue */
2934 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2935 ehea_refill_rq2(pr, 0);
2936 ehea_refill_rq3(pr, 0);
2937 }
2938 out:
2939 free_page((unsigned long)cb0);
2940
2941 return ret;
2942 }
2943
2944 static void ehea_reset_port(struct work_struct *work)
2945 {
2946 int ret;
2947 struct ehea_port *port =
2948 container_of(work, struct ehea_port, reset_task);
2949 struct net_device *dev = port->netdev;
2950
2951 mutex_lock(&dlpar_mem_lock);
2952 port->resets++;
2953 mutex_lock(&port->port_lock);
2954 netif_stop_queue(dev);
2955
2956 port_napi_disable(port);
2957
2958 ehea_down(dev);
2959
2960 ret = ehea_up(dev);
2961 if (ret)
2962 goto out;
2963
2964 ehea_set_multicast_list(dev);
2965
2966 if (netif_msg_timer(port))
2967 ehea_info("Device %s resetted successfully", dev->name);
2968
2969 port_napi_enable(port);
2970
2971 netif_wake_queue(dev);
2972 out:
2973 mutex_unlock(&port->port_lock);
2974 mutex_unlock(&dlpar_mem_lock);
2975 }
2976
2977 static void ehea_rereg_mrs(struct work_struct *work)
2978 {
2979 int ret, i;
2980 struct ehea_adapter *adapter;
2981
2982 ehea_info("LPAR memory changed - re-initializing driver");
2983
2984 list_for_each_entry(adapter, &adapter_list, list)
2985 if (adapter->active_ports) {
2986 /* Shutdown all ports */
2987 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2988 struct ehea_port *port = adapter->port[i];
2989 struct net_device *dev;
2990
2991 if (!port)
2992 continue;
2993
2994 dev = port->netdev;
2995
2996 if (dev->flags & IFF_UP) {
2997 mutex_lock(&port->port_lock);
2998 netif_stop_queue(dev);
2999 ehea_flush_sq(port);
3000 ret = ehea_stop_qps(dev);
3001 if (ret) {
3002 mutex_unlock(&port->port_lock);
3003 goto out;
3004 }
3005 port_napi_disable(port);
3006 mutex_unlock(&port->port_lock);
3007 }
3008 reset_sq_restart_flag(port);
3009 }
3010
3011 /* Unregister old memory region */
3012 ret = ehea_rem_mr(&adapter->mr);
3013 if (ret) {
3014 ehea_error("unregister MR failed - driver"
3015 " inoperable!");
3016 goto out;
3017 }
3018 }
3019
3020 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3021
3022 list_for_each_entry(adapter, &adapter_list, list)
3023 if (adapter->active_ports) {
3024 /* Register new memory region */
3025 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
3026 if (ret) {
3027 ehea_error("register MR failed - driver"
3028 " inoperable!");
3029 goto out;
3030 }
3031
3032 /* Restart all ports */
3033 for (i = 0; i < EHEA_MAX_PORTS; i++) {
3034 struct ehea_port *port = adapter->port[i];
3035
3036 if (port) {
3037 struct net_device *dev = port->netdev;
3038
3039 if (dev->flags & IFF_UP) {
3040 mutex_lock(&port->port_lock);
3041 port_napi_enable(port);
3042 ret = ehea_restart_qps(dev);
3043 check_sqs(port);
3044 if (!ret)
3045 netif_wake_queue(dev);
3046 mutex_unlock(&port->port_lock);
3047 }
3048 }
3049 }
3050 }
3051 ehea_info("re-initializing driver complete");
3052 out:
3053 return;
3054 }
3055
3056 static void ehea_tx_watchdog(struct net_device *dev)
3057 {
3058 struct ehea_port *port = netdev_priv(dev);
3059
3060 if (netif_carrier_ok(dev) &&
3061 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3062 ehea_schedule_port_reset(port);
3063 }
3064
3065 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3066 {
3067 struct hcp_query_ehea *cb;
3068 u64 hret;
3069 int ret;
3070
3071 cb = (void *)get_zeroed_page(GFP_KERNEL);
3072 if (!cb) {
3073 ret = -ENOMEM;
3074 goto out;
3075 }
3076
3077 hret = ehea_h_query_ehea(adapter->handle, cb);
3078
3079 if (hret != H_SUCCESS) {
3080 ret = -EIO;
3081 goto out_herr;
3082 }
3083
3084 adapter->max_mc_mac = cb->max_mc_mac - 1;
3085 ret = 0;
3086
3087 out_herr:
3088 free_page((unsigned long)cb);
3089 out:
3090 return ret;
3091 }
3092
3093 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3094 {
3095 struct hcp_ehea_port_cb4 *cb4;
3096 u64 hret;
3097 int ret = 0;
3098
3099 *jumbo = 0;
3100
3101 /* (Try to) enable *jumbo frames */
3102 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3103 if (!cb4) {
3104 ehea_error("no mem for cb4");
3105 ret = -ENOMEM;
3106 goto out;
3107 } else {
3108 hret = ehea_h_query_ehea_port(port->adapter->handle,
3109 port->logical_port_id,
3110 H_PORT_CB4,
3111 H_PORT_CB4_JUMBO, cb4);
3112 if (hret == H_SUCCESS) {
3113 if (cb4->jumbo_frame)
3114 *jumbo = 1;
3115 else {
3116 cb4->jumbo_frame = 1;
3117 hret = ehea_h_modify_ehea_port(port->adapter->
3118 handle,
3119 port->
3120 logical_port_id,
3121 H_PORT_CB4,
3122 H_PORT_CB4_JUMBO,
3123 cb4);
3124 if (hret == H_SUCCESS)
3125 *jumbo = 1;
3126 }
3127 } else
3128 ret = -EINVAL;
3129
3130 free_page((unsigned long)cb4);
3131 }
3132 out:
3133 return ret;
3134 }
3135
3136 static ssize_t ehea_show_port_id(struct device *dev,
3137 struct device_attribute *attr, char *buf)
3138 {
3139 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3140 return sprintf(buf, "%d", port->logical_port_id);
3141 }
3142
3143 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3144 NULL);
3145
3146 static void __devinit logical_port_release(struct device *dev)
3147 {
3148 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3149 of_node_put(port->ofdev.dev.of_node);
3150 }
3151
3152 static struct device *ehea_register_port(struct ehea_port *port,
3153 struct device_node *dn)
3154 {
3155 int ret;
3156
3157 port->ofdev.dev.of_node = of_node_get(dn);
3158 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3159 port->ofdev.dev.bus = &ibmebus_bus_type;
3160
3161 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3162 port->ofdev.dev.release = logical_port_release;
3163
3164 ret = of_device_register(&port->ofdev);
3165 if (ret) {
3166 ehea_error("failed to register device. ret=%d", ret);
3167 goto out;
3168 }
3169
3170 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3171 if (ret) {
3172 ehea_error("failed to register attributes, ret=%d", ret);
3173 goto out_unreg_of_dev;
3174 }
3175
3176 return &port->ofdev.dev;
3177
3178 out_unreg_of_dev:
3179 of_device_unregister(&port->ofdev);
3180 out:
3181 return NULL;
3182 }
3183
3184 static void ehea_unregister_port(struct ehea_port *port)
3185 {
3186 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3187 of_device_unregister(&port->ofdev);
3188 }
3189
3190 static const struct net_device_ops ehea_netdev_ops = {
3191 .ndo_open = ehea_open,
3192 .ndo_stop = ehea_stop,
3193 .ndo_start_xmit = ehea_start_xmit,
3194 #ifdef CONFIG_NET_POLL_CONTROLLER
3195 .ndo_poll_controller = ehea_netpoll,
3196 #endif
3197 .ndo_get_stats = ehea_get_stats,
3198 .ndo_set_mac_address = ehea_set_mac_addr,
3199 .ndo_validate_addr = eth_validate_addr,
3200 .ndo_set_multicast_list = ehea_set_multicast_list,
3201 .ndo_change_mtu = ehea_change_mtu,
3202 .ndo_vlan_rx_register = ehea_vlan_rx_register,
3203 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
3204 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
3205 .ndo_tx_timeout = ehea_tx_watchdog,
3206 };
3207
3208 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3209 u32 logical_port_id,
3210 struct device_node *dn)
3211 {
3212 int ret;
3213 struct net_device *dev;
3214 struct ehea_port *port;
3215 struct device *port_dev;
3216 int jumbo;
3217
3218 /* allocate memory for the port structures */
3219 dev = alloc_etherdev(sizeof(struct ehea_port));
3220
3221 if (!dev) {
3222 ehea_error("no mem for net_device");
3223 ret = -ENOMEM;
3224 goto out_err;
3225 }
3226
3227 port = netdev_priv(dev);
3228
3229 mutex_init(&port->port_lock);
3230 port->state = EHEA_PORT_DOWN;
3231 port->sig_comp_iv = sq_entries / 10;
3232
3233 port->adapter = adapter;
3234 port->netdev = dev;
3235 port->logical_port_id = logical_port_id;
3236
3237 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3238
3239 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3240 if (!port->mc_list) {
3241 ret = -ENOMEM;
3242 goto out_free_ethdev;
3243 }
3244
3245 INIT_LIST_HEAD(&port->mc_list->list);
3246
3247 ret = ehea_sense_port_attr(port);
3248 if (ret)
3249 goto out_free_mc_list;
3250
3251 port_dev = ehea_register_port(port, dn);
3252 if (!port_dev)
3253 goto out_free_mc_list;
3254
3255 SET_NETDEV_DEV(dev, port_dev);
3256
3257 /* initialize net_device structure */
3258 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3259
3260 dev->netdev_ops = &ehea_netdev_ops;
3261 ehea_set_ethtool_ops(dev);
3262
3263 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3264 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3265 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3266 | NETIF_F_LLTX;
3267 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3268
3269 INIT_WORK(&port->reset_task, ehea_reset_port);
3270
3271 ret = register_netdev(dev);
3272 if (ret) {
3273 ehea_error("register_netdev failed. ret=%d", ret);
3274 goto out_unreg_port;
3275 }
3276
3277 port->lro_max_aggr = lro_max_aggr;
3278
3279 ret = ehea_get_jumboframe_status(port, &jumbo);
3280 if (ret)
3281 ehea_error("failed determining jumbo frame status for %s",
3282 port->netdev->name);
3283
3284 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3285 jumbo == 1 ? "en" : "dis");
3286
3287 adapter->active_ports++;
3288
3289 return port;
3290
3291 out_unreg_port:
3292 ehea_unregister_port(port);
3293
3294 out_free_mc_list:
3295 kfree(port->mc_list);
3296
3297 out_free_ethdev:
3298 free_netdev(dev);
3299
3300 out_err:
3301 ehea_error("setting up logical port with id=%d failed, ret=%d",
3302 logical_port_id, ret);
3303 return NULL;
3304 }
3305
3306 static void ehea_shutdown_single_port(struct ehea_port *port)
3307 {
3308 struct ehea_adapter *adapter = port->adapter;
3309 unregister_netdev(port->netdev);
3310 ehea_unregister_port(port);
3311 kfree(port->mc_list);
3312 free_netdev(port->netdev);
3313 adapter->active_ports--;
3314 }
3315
3316 static int ehea_setup_ports(struct ehea_adapter *adapter)
3317 {
3318 struct device_node *lhea_dn;
3319 struct device_node *eth_dn = NULL;
3320
3321 const u32 *dn_log_port_id;
3322 int i = 0;
3323
3324 lhea_dn = adapter->ofdev->dev.of_node;
3325 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3326
3327 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3328 NULL);
3329 if (!dn_log_port_id) {
3330 ehea_error("bad device node: eth_dn name=%s",
3331 eth_dn->full_name);
3332 continue;
3333 }
3334
3335 if (ehea_add_adapter_mr(adapter)) {
3336 ehea_error("creating MR failed");
3337 of_node_put(eth_dn);
3338 return -EIO;
3339 }
3340
3341 adapter->port[i] = ehea_setup_single_port(adapter,
3342 *dn_log_port_id,
3343 eth_dn);
3344 if (adapter->port[i])
3345 ehea_info("%s -> logical port id #%d",
3346 adapter->port[i]->netdev->name,
3347 *dn_log_port_id);
3348 else
3349 ehea_remove_adapter_mr(adapter);
3350
3351 i++;
3352 }
3353 return 0;
3354 }
3355
3356 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3357 u32 logical_port_id)
3358 {
3359 struct device_node *lhea_dn;
3360 struct device_node *eth_dn = NULL;
3361 const u32 *dn_log_port_id;
3362
3363 lhea_dn = adapter->ofdev->dev.of_node;
3364 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3365
3366 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3367 NULL);
3368 if (dn_log_port_id)
3369 if (*dn_log_port_id == logical_port_id)
3370 return eth_dn;
3371 }
3372
3373 return NULL;
3374 }
3375
3376 static ssize_t ehea_probe_port(struct device *dev,
3377 struct device_attribute *attr,
3378 const char *buf, size_t count)
3379 {
3380 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3381 struct ehea_port *port;
3382 struct device_node *eth_dn = NULL;
3383 int i;
3384
3385 u32 logical_port_id;
3386
3387 sscanf(buf, "%d", &logical_port_id);
3388
3389 port = ehea_get_port(adapter, logical_port_id);
3390
3391 if (port) {
3392 ehea_info("adding port with logical port id=%d failed. port "
3393 "already configured as %s.", logical_port_id,
3394 port->netdev->name);
3395 return -EINVAL;
3396 }
3397
3398 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3399
3400 if (!eth_dn) {
3401 ehea_info("no logical port with id %d found", logical_port_id);
3402 return -EINVAL;
3403 }
3404
3405 if (ehea_add_adapter_mr(adapter)) {
3406 ehea_error("creating MR failed");
3407 return -EIO;
3408 }
3409
3410 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3411
3412 of_node_put(eth_dn);
3413
3414 if (port) {
3415 for (i = 0; i < EHEA_MAX_PORTS; i++)
3416 if (!adapter->port[i]) {
3417 adapter->port[i] = port;
3418 break;
3419 }
3420
3421 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3422 logical_port_id);
3423 } else {
3424 ehea_remove_adapter_mr(adapter);
3425 return -EIO;
3426 }
3427
3428 return (ssize_t) count;
3429 }
3430
3431 static ssize_t ehea_remove_port(struct device *dev,
3432 struct device_attribute *attr,
3433 const char *buf, size_t count)
3434 {
3435 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3436 struct ehea_port *port;
3437 int i;
3438 u32 logical_port_id;
3439
3440 sscanf(buf, "%d", &logical_port_id);
3441
3442 port = ehea_get_port(adapter, logical_port_id);
3443
3444 if (port) {
3445 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3446 logical_port_id);
3447
3448 ehea_shutdown_single_port(port);
3449
3450 for (i = 0; i < EHEA_MAX_PORTS; i++)
3451 if (adapter->port[i] == port) {
3452 adapter->port[i] = NULL;
3453 break;
3454 }
3455 } else {
3456 ehea_error("removing port with logical port id=%d failed. port "
3457 "not configured.", logical_port_id);
3458 return -EINVAL;
3459 }
3460
3461 ehea_remove_adapter_mr(adapter);
3462
3463 return (ssize_t) count;
3464 }
3465
3466 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3467 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3468
3469 int ehea_create_device_sysfs(struct platform_device *dev)
3470 {
3471 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3472 if (ret)
3473 goto out;
3474
3475 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3476 out:
3477 return ret;
3478 }
3479
3480 void ehea_remove_device_sysfs(struct platform_device *dev)
3481 {
3482 device_remove_file(&dev->dev, &dev_attr_probe_port);
3483 device_remove_file(&dev->dev, &dev_attr_remove_port);
3484 }
3485
3486 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3487 const struct of_device_id *id)
3488 {
3489 struct ehea_adapter *adapter;
3490 const u64 *adapter_handle;
3491 int ret;
3492
3493 if (!dev || !dev->dev.of_node) {
3494 ehea_error("Invalid ibmebus device probed");
3495 return -EINVAL;
3496 }
3497
3498 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3499 if (!adapter) {
3500 ret = -ENOMEM;
3501 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3502 goto out;
3503 }
3504
3505 list_add(&adapter->list, &adapter_list);
3506
3507 adapter->ofdev = dev;
3508
3509 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3510 NULL);
3511 if (adapter_handle)
3512 adapter->handle = *adapter_handle;
3513
3514 if (!adapter->handle) {
3515 dev_err(&dev->dev, "failed getting handle for adapter"
3516 " '%s'\n", dev->dev.of_node->full_name);
3517 ret = -ENODEV;
3518 goto out_free_ad;
3519 }
3520
3521 adapter->pd = EHEA_PD_ID;
3522
3523 dev_set_drvdata(&dev->dev, adapter);
3524
3525
3526 /* initialize adapter and ports */
3527 /* get adapter properties */
3528 ret = ehea_sense_adapter_attr(adapter);
3529 if (ret) {
3530 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3531 goto out_free_ad;
3532 }
3533
3534 adapter->neq = ehea_create_eq(adapter,
3535 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3536 if (!adapter->neq) {
3537 ret = -EIO;
3538 dev_err(&dev->dev, "NEQ creation failed\n");
3539 goto out_free_ad;
3540 }
3541
3542 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3543 (unsigned long)adapter);
3544
3545 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3546 ehea_interrupt_neq, IRQF_DISABLED,
3547 "ehea_neq", adapter);
3548 if (ret) {
3549 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3550 goto out_kill_eq;
3551 }
3552
3553 ret = ehea_create_device_sysfs(dev);
3554 if (ret)
3555 goto out_free_irq;
3556
3557 ret = ehea_setup_ports(adapter);
3558 if (ret) {
3559 dev_err(&dev->dev, "setup_ports failed\n");
3560 goto out_rem_dev_sysfs;
3561 }
3562
3563 ret = 0;
3564 goto out;
3565
3566 out_rem_dev_sysfs:
3567 ehea_remove_device_sysfs(dev);
3568
3569 out_free_irq:
3570 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3571
3572 out_kill_eq:
3573 ehea_destroy_eq(adapter->neq);
3574
3575 out_free_ad:
3576 list_del(&adapter->list);
3577 kfree(adapter);
3578
3579 out:
3580 ehea_update_firmware_handles();
3581
3582 return ret;
3583 }
3584
3585 static int __devexit ehea_remove(struct platform_device *dev)
3586 {
3587 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3588 int i;
3589
3590 for (i = 0; i < EHEA_MAX_PORTS; i++)
3591 if (adapter->port[i]) {
3592 ehea_shutdown_single_port(adapter->port[i]);
3593 adapter->port[i] = NULL;
3594 }
3595
3596 ehea_remove_device_sysfs(dev);
3597
3598 flush_scheduled_work();
3599
3600 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3601 tasklet_kill(&adapter->neq_tasklet);
3602
3603 ehea_destroy_eq(adapter->neq);
3604 ehea_remove_adapter_mr(adapter);
3605 list_del(&adapter->list);
3606 kfree(adapter);
3607
3608 ehea_update_firmware_handles();
3609
3610 return 0;
3611 }
3612
3613 void ehea_crash_handler(void)
3614 {
3615 int i;
3616
3617 if (ehea_fw_handles.arr)
3618 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3619 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3620 ehea_fw_handles.arr[i].fwh,
3621 FORCE_FREE);
3622
3623 if (ehea_bcmc_regs.arr)
3624 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3625 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3626 ehea_bcmc_regs.arr[i].port_id,
3627 ehea_bcmc_regs.arr[i].reg_type,
3628 ehea_bcmc_regs.arr[i].macaddr,
3629 0, H_DEREG_BCMC);
3630 }
3631
3632 static int ehea_mem_notifier(struct notifier_block *nb,
3633 unsigned long action, void *data)
3634 {
3635 int ret = NOTIFY_BAD;
3636 struct memory_notify *arg = data;
3637
3638 mutex_lock(&dlpar_mem_lock);
3639
3640 switch (action) {
3641 case MEM_CANCEL_OFFLINE:
3642 ehea_info("memory offlining canceled");
3643 /* Readd canceled memory block */
3644 case MEM_ONLINE:
3645 ehea_info("memory is going online");
3646 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3647 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3648 goto out_unlock;
3649 ehea_rereg_mrs(NULL);
3650 break;
3651 case MEM_GOING_OFFLINE:
3652 ehea_info("memory is going offline");
3653 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3654 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3655 goto out_unlock;
3656 ehea_rereg_mrs(NULL);
3657 break;
3658 default:
3659 break;
3660 }
3661
3662 ehea_update_firmware_handles();
3663 ret = NOTIFY_OK;
3664
3665 out_unlock:
3666 mutex_unlock(&dlpar_mem_lock);
3667 return ret;
3668 }
3669
3670 static struct notifier_block ehea_mem_nb = {
3671 .notifier_call = ehea_mem_notifier,
3672 };
3673
3674 static int ehea_reboot_notifier(struct notifier_block *nb,
3675 unsigned long action, void *unused)
3676 {
3677 if (action == SYS_RESTART) {
3678 ehea_info("Reboot: freeing all eHEA resources");
3679 ibmebus_unregister_driver(&ehea_driver);
3680 }
3681 return NOTIFY_DONE;
3682 }
3683
3684 static struct notifier_block ehea_reboot_nb = {
3685 .notifier_call = ehea_reboot_notifier,
3686 };
3687
3688 static int check_module_parm(void)
3689 {
3690 int ret = 0;
3691
3692 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3693 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3694 ehea_info("Bad parameter: rq1_entries");
3695 ret = -EINVAL;
3696 }
3697 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3698 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3699 ehea_info("Bad parameter: rq2_entries");
3700 ret = -EINVAL;
3701 }
3702 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3703 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3704 ehea_info("Bad parameter: rq3_entries");
3705 ret = -EINVAL;
3706 }
3707 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3708 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3709 ehea_info("Bad parameter: sq_entries");
3710 ret = -EINVAL;
3711 }
3712
3713 return ret;
3714 }
3715
3716 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3717 char *buf)
3718 {
3719 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3720 }
3721
3722 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3723 ehea_show_capabilities, NULL);
3724
3725 int __init ehea_module_init(void)
3726 {
3727 int ret;
3728
3729 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3730 DRV_VERSION);
3731
3732
3733 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3734 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3735 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3736
3737 mutex_init(&ehea_fw_handles.lock);
3738 spin_lock_init(&ehea_bcmc_regs.lock);
3739
3740 ret = check_module_parm();
3741 if (ret)
3742 goto out;
3743
3744 ret = ehea_create_busmap();
3745 if (ret)
3746 goto out;
3747
3748 ret = register_reboot_notifier(&ehea_reboot_nb);
3749 if (ret)
3750 ehea_info("failed registering reboot notifier");
3751
3752 ret = register_memory_notifier(&ehea_mem_nb);
3753 if (ret)
3754 ehea_info("failed registering memory remove notifier");
3755
3756 ret = crash_shutdown_register(ehea_crash_handler);
3757 if (ret)
3758 ehea_info("failed registering crash handler");
3759
3760 ret = ibmebus_register_driver(&ehea_driver);
3761 if (ret) {
3762 ehea_error("failed registering eHEA device driver on ebus");
3763 goto out2;
3764 }
3765
3766 ret = driver_create_file(&ehea_driver.driver,
3767 &driver_attr_capabilities);
3768 if (ret) {
3769 ehea_error("failed to register capabilities attribute, ret=%d",
3770 ret);
3771 goto out3;
3772 }
3773
3774 return ret;
3775
3776 out3:
3777 ibmebus_unregister_driver(&ehea_driver);
3778 out2:
3779 unregister_memory_notifier(&ehea_mem_nb);
3780 unregister_reboot_notifier(&ehea_reboot_nb);
3781 crash_shutdown_unregister(ehea_crash_handler);
3782 out:
3783 return ret;
3784 }
3785
3786 static void __exit ehea_module_exit(void)
3787 {
3788 int ret;
3789
3790 flush_scheduled_work();
3791 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3792 ibmebus_unregister_driver(&ehea_driver);
3793 unregister_reboot_notifier(&ehea_reboot_nb);
3794 ret = crash_shutdown_unregister(ehea_crash_handler);
3795 if (ret)
3796 ehea_info("failed unregistering crash handler");
3797 unregister_memory_notifier(&ehea_mem_nb);
3798 kfree(ehea_fw_handles.arr);
3799 kfree(ehea_bcmc_regs.arr);
3800 ehea_destroy_busmap();
3801 }
3802
3803 module_init(ehea_module_init);
3804 module_exit(ehea_module_exit);
Linux kernel - Deliverables
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