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ehea: Fix synchronization between HW and SW send queue
[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 of_device *dev,
111 const struct of_device_id *id);
112
113 static int __devexit ehea_remove(struct of_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 = kzalloc(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 = kzalloc(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;
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
359 tx_packets = 0;
360 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
361 tx_packets += port->port_res[i].tx_packets;
362
363 stats->tx_packets = tx_packets;
364 stats->multicast = cb2->rxmcp;
365 stats->rx_errors = cb2->rxuerr;
366 stats->rx_bytes = cb2->rxo;
367 stats->tx_bytes = cb2->txo;
368 stats->rx_packets = rx_packets;
369
370 out_herr:
371 free_page((unsigned long)cb2);
372 out:
373 return stats;
374 }
375
376 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
377 {
378 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
379 struct net_device *dev = pr->port->netdev;
380 int max_index_mask = pr->rq1_skba.len - 1;
381 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
382 int adder = 0;
383 int i;
384
385 pr->rq1_skba.os_skbs = 0;
386
387 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
388 if (nr_of_wqes > 0)
389 pr->rq1_skba.index = index;
390 pr->rq1_skba.os_skbs = fill_wqes;
391 return;
392 }
393
394 for (i = 0; i < fill_wqes; i++) {
395 if (!skb_arr_rq1[index]) {
396 skb_arr_rq1[index] = netdev_alloc_skb(dev,
397 EHEA_L_PKT_SIZE);
398 if (!skb_arr_rq1[index]) {
399 pr->rq1_skba.os_skbs = fill_wqes - i;
400 break;
401 }
402 }
403 index--;
404 index &= max_index_mask;
405 adder++;
406 }
407
408 if (adder == 0)
409 return;
410
411 /* Ring doorbell */
412 ehea_update_rq1a(pr->qp, adder);
413 }
414
415 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
416 {
417 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
418 struct net_device *dev = pr->port->netdev;
419 int i;
420
421 for (i = 0; i < pr->rq1_skba.len; i++) {
422 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
423 if (!skb_arr_rq1[i])
424 break;
425 }
426 /* Ring doorbell */
427 ehea_update_rq1a(pr->qp, nr_rq1a);
428 }
429
430 static int ehea_refill_rq_def(struct ehea_port_res *pr,
431 struct ehea_q_skb_arr *q_skba, int rq_nr,
432 int num_wqes, int wqe_type, int packet_size)
433 {
434 struct net_device *dev = pr->port->netdev;
435 struct ehea_qp *qp = pr->qp;
436 struct sk_buff **skb_arr = q_skba->arr;
437 struct ehea_rwqe *rwqe;
438 int i, index, max_index_mask, fill_wqes;
439 int adder = 0;
440 int ret = 0;
441
442 fill_wqes = q_skba->os_skbs + num_wqes;
443 q_skba->os_skbs = 0;
444
445 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
446 q_skba->os_skbs = fill_wqes;
447 return ret;
448 }
449
450 index = q_skba->index;
451 max_index_mask = q_skba->len - 1;
452 for (i = 0; i < fill_wqes; i++) {
453 u64 tmp_addr;
454 struct sk_buff *skb;
455
456 skb = netdev_alloc_skb_ip_align(dev, packet_size);
457 if (!skb) {
458 q_skba->os_skbs = fill_wqes - i;
459 if (q_skba->os_skbs == q_skba->len - 2) {
460 ehea_info("%s: rq%i ran dry - no mem for skb",
461 pr->port->netdev->name, rq_nr);
462 ret = -ENOMEM;
463 }
464 break;
465 }
466
467 skb_arr[index] = skb;
468 tmp_addr = ehea_map_vaddr(skb->data);
469 if (tmp_addr == -1) {
470 dev_kfree_skb(skb);
471 q_skba->os_skbs = fill_wqes - i;
472 ret = 0;
473 break;
474 }
475
476 rwqe = ehea_get_next_rwqe(qp, rq_nr);
477 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
478 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
479 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
480 rwqe->sg_list[0].vaddr = tmp_addr;
481 rwqe->sg_list[0].len = packet_size;
482 rwqe->data_segments = 1;
483
484 index++;
485 index &= max_index_mask;
486 adder++;
487 }
488
489 q_skba->index = index;
490 if (adder == 0)
491 goto out;
492
493 /* Ring doorbell */
494 iosync();
495 if (rq_nr == 2)
496 ehea_update_rq2a(pr->qp, adder);
497 else
498 ehea_update_rq3a(pr->qp, adder);
499 out:
500 return ret;
501 }
502
503
504 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
505 {
506 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
507 nr_of_wqes, EHEA_RWQE2_TYPE,
508 EHEA_RQ2_PKT_SIZE);
509 }
510
511
512 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
513 {
514 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
515 nr_of_wqes, EHEA_RWQE3_TYPE,
516 EHEA_MAX_PACKET_SIZE);
517 }
518
519 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
520 {
521 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
522 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
523 return 0;
524 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
525 (cqe->header_length == 0))
526 return 0;
527 return -EINVAL;
528 }
529
530 static inline void ehea_fill_skb(struct net_device *dev,
531 struct sk_buff *skb, struct ehea_cqe *cqe)
532 {
533 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
534
535 skb_put(skb, length);
536 skb->ip_summed = CHECKSUM_UNNECESSARY;
537 skb->protocol = eth_type_trans(skb, dev);
538 }
539
540 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
541 int arr_len,
542 struct ehea_cqe *cqe)
543 {
544 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
545 struct sk_buff *skb;
546 void *pref;
547 int x;
548
549 x = skb_index + 1;
550 x &= (arr_len - 1);
551
552 pref = skb_array[x];
553 if (pref) {
554 prefetchw(pref);
555 prefetchw(pref + EHEA_CACHE_LINE);
556
557 pref = (skb_array[x]->data);
558 prefetch(pref);
559 prefetch(pref + EHEA_CACHE_LINE);
560 prefetch(pref + EHEA_CACHE_LINE * 2);
561 prefetch(pref + EHEA_CACHE_LINE * 3);
562 }
563
564 skb = skb_array[skb_index];
565 skb_array[skb_index] = NULL;
566 return skb;
567 }
568
569 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
570 int arr_len, int wqe_index)
571 {
572 struct sk_buff *skb;
573 void *pref;
574 int x;
575
576 x = wqe_index + 1;
577 x &= (arr_len - 1);
578
579 pref = skb_array[x];
580 if (pref) {
581 prefetchw(pref);
582 prefetchw(pref + EHEA_CACHE_LINE);
583
584 pref = (skb_array[x]->data);
585 prefetchw(pref);
586 prefetchw(pref + EHEA_CACHE_LINE);
587 }
588
589 skb = skb_array[wqe_index];
590 skb_array[wqe_index] = NULL;
591 return skb;
592 }
593
594 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
595 struct ehea_cqe *cqe, int *processed_rq2,
596 int *processed_rq3)
597 {
598 struct sk_buff *skb;
599
600 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
601 pr->p_stats.err_tcp_cksum++;
602 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
603 pr->p_stats.err_ip_cksum++;
604 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
605 pr->p_stats.err_frame_crc++;
606
607 if (rq == 2) {
608 *processed_rq2 += 1;
609 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
610 dev_kfree_skb(skb);
611 } else if (rq == 3) {
612 *processed_rq3 += 1;
613 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
614 dev_kfree_skb(skb);
615 }
616
617 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
618 if (netif_msg_rx_err(pr->port)) {
619 ehea_error("Critical receive error for QP %d. "
620 "Resetting port.", pr->qp->init_attr.qp_nr);
621 ehea_dump(cqe, sizeof(*cqe), "CQE");
622 }
623 ehea_schedule_port_reset(pr->port);
624 return 1;
625 }
626
627 return 0;
628 }
629
630 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
631 void **tcph, u64 *hdr_flags, void *priv)
632 {
633 struct ehea_cqe *cqe = priv;
634 unsigned int ip_len;
635 struct iphdr *iph;
636
637 /* non tcp/udp packets */
638 if (!cqe->header_length)
639 return -1;
640
641 /* non tcp packet */
642 skb_reset_network_header(skb);
643 iph = ip_hdr(skb);
644 if (iph->protocol != IPPROTO_TCP)
645 return -1;
646
647 ip_len = ip_hdrlen(skb);
648 skb_set_transport_header(skb, ip_len);
649 *tcph = tcp_hdr(skb);
650
651 /* check if ip header and tcp header are complete */
652 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
653 return -1;
654
655 *hdr_flags = LRO_IPV4 | LRO_TCP;
656 *iphdr = iph;
657
658 return 0;
659 }
660
661 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
662 struct sk_buff *skb)
663 {
664 int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
665 pr->port->vgrp);
666
667 if (use_lro) {
668 if (vlan_extracted)
669 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
670 pr->port->vgrp,
671 cqe->vlan_tag,
672 cqe);
673 else
674 lro_receive_skb(&pr->lro_mgr, skb, cqe);
675 } else {
676 if (vlan_extracted)
677 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
678 cqe->vlan_tag);
679 else
680 netif_receive_skb(skb);
681 }
682 }
683
684 static int ehea_proc_rwqes(struct net_device *dev,
685 struct ehea_port_res *pr,
686 int budget)
687 {
688 struct ehea_port *port = pr->port;
689 struct ehea_qp *qp = pr->qp;
690 struct ehea_cqe *cqe;
691 struct sk_buff *skb;
692 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
693 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
694 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
695 int skb_arr_rq1_len = pr->rq1_skba.len;
696 int skb_arr_rq2_len = pr->rq2_skba.len;
697 int skb_arr_rq3_len = pr->rq3_skba.len;
698 int processed, processed_rq1, processed_rq2, processed_rq3;
699 int wqe_index, last_wqe_index, rq, port_reset;
700
701 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
702 last_wqe_index = 0;
703
704 cqe = ehea_poll_rq1(qp, &wqe_index);
705 while ((processed < budget) && cqe) {
706 ehea_inc_rq1(qp);
707 processed_rq1++;
708 processed++;
709 if (netif_msg_rx_status(port))
710 ehea_dump(cqe, sizeof(*cqe), "CQE");
711
712 last_wqe_index = wqe_index;
713 rmb();
714 if (!ehea_check_cqe(cqe, &rq)) {
715 if (rq == 1) {
716 /* LL RQ1 */
717 skb = get_skb_by_index_ll(skb_arr_rq1,
718 skb_arr_rq1_len,
719 wqe_index);
720 if (unlikely(!skb)) {
721 if (netif_msg_rx_err(port))
722 ehea_error("LL rq1: skb=NULL");
723
724 skb = netdev_alloc_skb(dev,
725 EHEA_L_PKT_SIZE);
726 if (!skb)
727 break;
728 }
729 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
730 cqe->num_bytes_transfered - 4);
731 ehea_fill_skb(dev, skb, cqe);
732 } else if (rq == 2) {
733 /* RQ2 */
734 skb = get_skb_by_index(skb_arr_rq2,
735 skb_arr_rq2_len, cqe);
736 if (unlikely(!skb)) {
737 if (netif_msg_rx_err(port))
738 ehea_error("rq2: skb=NULL");
739 break;
740 }
741 ehea_fill_skb(dev, skb, cqe);
742 processed_rq2++;
743 } else {
744 /* RQ3 */
745 skb = get_skb_by_index(skb_arr_rq3,
746 skb_arr_rq3_len, cqe);
747 if (unlikely(!skb)) {
748 if (netif_msg_rx_err(port))
749 ehea_error("rq3: skb=NULL");
750 break;
751 }
752 ehea_fill_skb(dev, skb, cqe);
753 processed_rq3++;
754 }
755
756 ehea_proc_skb(pr, cqe, skb);
757 } else {
758 pr->p_stats.poll_receive_errors++;
759 port_reset = ehea_treat_poll_error(pr, rq, cqe,
760 &processed_rq2,
761 &processed_rq3);
762 if (port_reset)
763 break;
764 }
765 cqe = ehea_poll_rq1(qp, &wqe_index);
766 }
767 if (use_lro)
768 lro_flush_all(&pr->lro_mgr);
769
770 pr->rx_packets += processed;
771
772 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
773 ehea_refill_rq2(pr, processed_rq2);
774 ehea_refill_rq3(pr, processed_rq3);
775
776 return processed;
777 }
778
779 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
780
781 static void reset_sq_restart_flag(struct ehea_port *port)
782 {
783 int i;
784
785 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
786 struct ehea_port_res *pr = &port->port_res[i];
787 pr->sq_restart_flag = 0;
788 }
789 }
790
791 static void check_sqs(struct ehea_port *port)
792 {
793 struct ehea_swqe *swqe;
794 int swqe_index;
795 int i, k;
796
797 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
798 struct ehea_port_res *pr = &port->port_res[i];
799 k = 0;
800 swqe = ehea_get_swqe(pr->qp, &swqe_index);
801 memset(swqe, 0, SWQE_HEADER_SIZE);
802 atomic_dec(&pr->swqe_avail);
803
804 swqe->tx_control |= EHEA_SWQE_PURGE;
805 swqe->wr_id = SWQE_RESTART_CHECK;
806 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
807 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
808 swqe->immediate_data_length = 80;
809
810 ehea_post_swqe(pr->qp, swqe);
811
812 while (pr->sq_restart_flag == 0) {
813 msleep(5);
814 if (++k == 100) {
815 ehea_error("HW/SW queues out of sync");
816 ehea_schedule_port_reset(pr->port);
817 return;
818 }
819 }
820 }
821
822 return;
823 }
824
825
826 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
827 {
828 struct sk_buff *skb;
829 struct ehea_cq *send_cq = pr->send_cq;
830 struct ehea_cqe *cqe;
831 int quota = my_quota;
832 int cqe_counter = 0;
833 int swqe_av = 0;
834 int index;
835 unsigned long flags;
836
837 cqe = ehea_poll_cq(send_cq);
838 while (cqe && (quota > 0)) {
839 ehea_inc_cq(send_cq);
840
841 cqe_counter++;
842 rmb();
843
844 if (cqe->wr_id == SWQE_RESTART_CHECK) {
845 pr->sq_restart_flag = 1;
846 swqe_av++;
847 break;
848 }
849
850 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
851 ehea_error("Bad send completion status=0x%04X",
852 cqe->status);
853
854 if (netif_msg_tx_err(pr->port))
855 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
856
857 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
858 ehea_error("Resetting port");
859 ehea_schedule_port_reset(pr->port);
860 break;
861 }
862 }
863
864 if (netif_msg_tx_done(pr->port))
865 ehea_dump(cqe, sizeof(*cqe), "CQE");
866
867 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
868 == EHEA_SWQE2_TYPE)) {
869
870 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
871 skb = pr->sq_skba.arr[index];
872 dev_kfree_skb(skb);
873 pr->sq_skba.arr[index] = NULL;
874 }
875
876 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
877 quota--;
878
879 cqe = ehea_poll_cq(send_cq);
880 }
881
882 ehea_update_feca(send_cq, cqe_counter);
883 atomic_add(swqe_av, &pr->swqe_avail);
884
885 spin_lock_irqsave(&pr->netif_queue, flags);
886
887 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
888 >= pr->swqe_refill_th)) {
889 netif_wake_queue(pr->port->netdev);
890 pr->queue_stopped = 0;
891 }
892 spin_unlock_irqrestore(&pr->netif_queue, flags);
893
894 return cqe;
895 }
896
897 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
898 #define EHEA_POLL_MAX_CQES 65535
899
900 static int ehea_poll(struct napi_struct *napi, int budget)
901 {
902 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
903 napi);
904 struct net_device *dev = pr->port->netdev;
905 struct ehea_cqe *cqe;
906 struct ehea_cqe *cqe_skb = NULL;
907 int force_irq, wqe_index;
908 int rx = 0;
909
910 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
911 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
912
913 if (!force_irq)
914 rx += ehea_proc_rwqes(dev, pr, budget - rx);
915
916 while ((rx != budget) || force_irq) {
917 pr->poll_counter = 0;
918 force_irq = 0;
919 napi_complete(napi);
920 ehea_reset_cq_ep(pr->recv_cq);
921 ehea_reset_cq_ep(pr->send_cq);
922 ehea_reset_cq_n1(pr->recv_cq);
923 ehea_reset_cq_n1(pr->send_cq);
924 rmb();
925 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
926 cqe_skb = ehea_poll_cq(pr->send_cq);
927
928 if (!cqe && !cqe_skb)
929 return rx;
930
931 if (!napi_reschedule(napi))
932 return rx;
933
934 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
935 rx += ehea_proc_rwqes(dev, pr, budget - rx);
936 }
937
938 pr->poll_counter++;
939 return rx;
940 }
941
942 #ifdef CONFIG_NET_POLL_CONTROLLER
943 static void ehea_netpoll(struct net_device *dev)
944 {
945 struct ehea_port *port = netdev_priv(dev);
946 int i;
947
948 for (i = 0; i < port->num_def_qps; i++)
949 napi_schedule(&port->port_res[i].napi);
950 }
951 #endif
952
953 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
954 {
955 struct ehea_port_res *pr = param;
956
957 napi_schedule(&pr->napi);
958
959 return IRQ_HANDLED;
960 }
961
962 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
963 {
964 struct ehea_port *port = param;
965 struct ehea_eqe *eqe;
966 struct ehea_qp *qp;
967 u32 qp_token;
968 u64 resource_type, aer, aerr;
969 int reset_port = 0;
970
971 eqe = ehea_poll_eq(port->qp_eq);
972
973 while (eqe) {
974 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
975 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
976 eqe->entry, qp_token);
977
978 qp = port->port_res[qp_token].qp;
979
980 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
981 &aer, &aerr);
982
983 if (resource_type == EHEA_AER_RESTYPE_QP) {
984 if ((aer & EHEA_AER_RESET_MASK) ||
985 (aerr & EHEA_AERR_RESET_MASK))
986 reset_port = 1;
987 } else
988 reset_port = 1; /* Reset in case of CQ or EQ error */
989
990 eqe = ehea_poll_eq(port->qp_eq);
991 }
992
993 if (reset_port) {
994 ehea_error("Resetting port");
995 ehea_schedule_port_reset(port);
996 }
997
998 return IRQ_HANDLED;
999 }
1000
1001 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1002 int logical_port)
1003 {
1004 int i;
1005
1006 for (i = 0; i < EHEA_MAX_PORTS; i++)
1007 if (adapter->port[i])
1008 if (adapter->port[i]->logical_port_id == logical_port)
1009 return adapter->port[i];
1010 return NULL;
1011 }
1012
1013 int ehea_sense_port_attr(struct ehea_port *port)
1014 {
1015 int ret;
1016 u64 hret;
1017 struct hcp_ehea_port_cb0 *cb0;
1018
1019 /* may be called via ehea_neq_tasklet() */
1020 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1021 if (!cb0) {
1022 ehea_error("no mem for cb0");
1023 ret = -ENOMEM;
1024 goto out;
1025 }
1026
1027 hret = ehea_h_query_ehea_port(port->adapter->handle,
1028 port->logical_port_id, H_PORT_CB0,
1029 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1030 cb0);
1031 if (hret != H_SUCCESS) {
1032 ret = -EIO;
1033 goto out_free;
1034 }
1035
1036 /* MAC address */
1037 port->mac_addr = cb0->port_mac_addr << 16;
1038
1039 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1040 ret = -EADDRNOTAVAIL;
1041 goto out_free;
1042 }
1043
1044 /* Port speed */
1045 switch (cb0->port_speed) {
1046 case H_SPEED_10M_H:
1047 port->port_speed = EHEA_SPEED_10M;
1048 port->full_duplex = 0;
1049 break;
1050 case H_SPEED_10M_F:
1051 port->port_speed = EHEA_SPEED_10M;
1052 port->full_duplex = 1;
1053 break;
1054 case H_SPEED_100M_H:
1055 port->port_speed = EHEA_SPEED_100M;
1056 port->full_duplex = 0;
1057 break;
1058 case H_SPEED_100M_F:
1059 port->port_speed = EHEA_SPEED_100M;
1060 port->full_duplex = 1;
1061 break;
1062 case H_SPEED_1G_F:
1063 port->port_speed = EHEA_SPEED_1G;
1064 port->full_duplex = 1;
1065 break;
1066 case H_SPEED_10G_F:
1067 port->port_speed = EHEA_SPEED_10G;
1068 port->full_duplex = 1;
1069 break;
1070 default:
1071 port->port_speed = 0;
1072 port->full_duplex = 0;
1073 break;
1074 }
1075
1076 port->autoneg = 1;
1077 port->num_mcs = cb0->num_default_qps;
1078
1079 /* Number of default QPs */
1080 if (use_mcs)
1081 port->num_def_qps = cb0->num_default_qps;
1082 else
1083 port->num_def_qps = 1;
1084
1085 if (!port->num_def_qps) {
1086 ret = -EINVAL;
1087 goto out_free;
1088 }
1089
1090 port->num_tx_qps = num_tx_qps;
1091
1092 if (port->num_def_qps >= port->num_tx_qps)
1093 port->num_add_tx_qps = 0;
1094 else
1095 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1096
1097 ret = 0;
1098 out_free:
1099 if (ret || netif_msg_probe(port))
1100 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1101 free_page((unsigned long)cb0);
1102 out:
1103 return ret;
1104 }
1105
1106 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1107 {
1108 struct hcp_ehea_port_cb4 *cb4;
1109 u64 hret;
1110 int ret = 0;
1111
1112 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1113 if (!cb4) {
1114 ehea_error("no mem for cb4");
1115 ret = -ENOMEM;
1116 goto out;
1117 }
1118
1119 cb4->port_speed = port_speed;
1120
1121 netif_carrier_off(port->netdev);
1122
1123 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1124 port->logical_port_id,
1125 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1126 if (hret == H_SUCCESS) {
1127 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1128
1129 hret = ehea_h_query_ehea_port(port->adapter->handle,
1130 port->logical_port_id,
1131 H_PORT_CB4, H_PORT_CB4_SPEED,
1132 cb4);
1133 if (hret == H_SUCCESS) {
1134 switch (cb4->port_speed) {
1135 case H_SPEED_10M_H:
1136 port->port_speed = EHEA_SPEED_10M;
1137 port->full_duplex = 0;
1138 break;
1139 case H_SPEED_10M_F:
1140 port->port_speed = EHEA_SPEED_10M;
1141 port->full_duplex = 1;
1142 break;
1143 case H_SPEED_100M_H:
1144 port->port_speed = EHEA_SPEED_100M;
1145 port->full_duplex = 0;
1146 break;
1147 case H_SPEED_100M_F:
1148 port->port_speed = EHEA_SPEED_100M;
1149 port->full_duplex = 1;
1150 break;
1151 case H_SPEED_1G_F:
1152 port->port_speed = EHEA_SPEED_1G;
1153 port->full_duplex = 1;
1154 break;
1155 case H_SPEED_10G_F:
1156 port->port_speed = EHEA_SPEED_10G;
1157 port->full_duplex = 1;
1158 break;
1159 default:
1160 port->port_speed = 0;
1161 port->full_duplex = 0;
1162 break;
1163 }
1164 } else {
1165 ehea_error("Failed sensing port speed");
1166 ret = -EIO;
1167 }
1168 } else {
1169 if (hret == H_AUTHORITY) {
1170 ehea_info("Hypervisor denied setting port speed");
1171 ret = -EPERM;
1172 } else {
1173 ret = -EIO;
1174 ehea_error("Failed setting port speed");
1175 }
1176 }
1177 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1178 netif_carrier_on(port->netdev);
1179
1180 free_page((unsigned long)cb4);
1181 out:
1182 return ret;
1183 }
1184
1185 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1186 {
1187 int ret;
1188 u8 ec;
1189 u8 portnum;
1190 struct ehea_port *port;
1191
1192 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1193 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1194 port = ehea_get_port(adapter, portnum);
1195
1196 switch (ec) {
1197 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1198
1199 if (!port) {
1200 ehea_error("unknown portnum %x", portnum);
1201 break;
1202 }
1203
1204 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1205 if (!netif_carrier_ok(port->netdev)) {
1206 ret = ehea_sense_port_attr(port);
1207 if (ret) {
1208 ehea_error("failed resensing port "
1209 "attributes");
1210 break;
1211 }
1212
1213 if (netif_msg_link(port))
1214 ehea_info("%s: Logical port up: %dMbps "
1215 "%s Duplex",
1216 port->netdev->name,
1217 port->port_speed,
1218 port->full_duplex ==
1219 1 ? "Full" : "Half");
1220
1221 netif_carrier_on(port->netdev);
1222 netif_wake_queue(port->netdev);
1223 }
1224 } else
1225 if (netif_carrier_ok(port->netdev)) {
1226 if (netif_msg_link(port))
1227 ehea_info("%s: Logical port down",
1228 port->netdev->name);
1229 netif_carrier_off(port->netdev);
1230 netif_stop_queue(port->netdev);
1231 }
1232
1233 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1234 port->phy_link = EHEA_PHY_LINK_UP;
1235 if (netif_msg_link(port))
1236 ehea_info("%s: Physical port up",
1237 port->netdev->name);
1238 if (prop_carrier_state)
1239 netif_carrier_on(port->netdev);
1240 } else {
1241 port->phy_link = EHEA_PHY_LINK_DOWN;
1242 if (netif_msg_link(port))
1243 ehea_info("%s: Physical port down",
1244 port->netdev->name);
1245 if (prop_carrier_state)
1246 netif_carrier_off(port->netdev);
1247 }
1248
1249 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1250 ehea_info("External switch port is primary port");
1251 else
1252 ehea_info("External switch port is backup port");
1253
1254 break;
1255 case EHEA_EC_ADAPTER_MALFUNC:
1256 ehea_error("Adapter malfunction");
1257 break;
1258 case EHEA_EC_PORT_MALFUNC:
1259 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1260 netif_carrier_off(port->netdev);
1261 netif_stop_queue(port->netdev);
1262 break;
1263 default:
1264 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1265 break;
1266 }
1267 }
1268
1269 static void ehea_neq_tasklet(unsigned long data)
1270 {
1271 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1272 struct ehea_eqe *eqe;
1273 u64 event_mask;
1274
1275 eqe = ehea_poll_eq(adapter->neq);
1276 ehea_debug("eqe=%p", eqe);
1277
1278 while (eqe) {
1279 ehea_debug("*eqe=%lx", eqe->entry);
1280 ehea_parse_eqe(adapter, eqe->entry);
1281 eqe = ehea_poll_eq(adapter->neq);
1282 ehea_debug("next eqe=%p", eqe);
1283 }
1284
1285 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1286 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1287 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1288
1289 ehea_h_reset_events(adapter->handle,
1290 adapter->neq->fw_handle, event_mask);
1291 }
1292
1293 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1294 {
1295 struct ehea_adapter *adapter = param;
1296 tasklet_hi_schedule(&adapter->neq_tasklet);
1297 return IRQ_HANDLED;
1298 }
1299
1300
1301 static int ehea_fill_port_res(struct ehea_port_res *pr)
1302 {
1303 int ret;
1304 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1305
1306 ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1307 - init_attr->act_nr_rwqes_rq2
1308 - init_attr->act_nr_rwqes_rq3 - 1);
1309
1310 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1311
1312 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1313
1314 return ret;
1315 }
1316
1317 static int ehea_reg_interrupts(struct net_device *dev)
1318 {
1319 struct ehea_port *port = netdev_priv(dev);
1320 struct ehea_port_res *pr;
1321 int i, ret;
1322
1323
1324 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1325 dev->name);
1326
1327 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1328 ehea_qp_aff_irq_handler,
1329 IRQF_DISABLED, port->int_aff_name, port);
1330 if (ret) {
1331 ehea_error("failed registering irq for qp_aff_irq_handler:"
1332 "ist=%X", port->qp_eq->attr.ist1);
1333 goto out_free_qpeq;
1334 }
1335
1336 if (netif_msg_ifup(port))
1337 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1338 "registered", port->qp_eq->attr.ist1);
1339
1340
1341 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1342 pr = &port->port_res[i];
1343 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1344 "%s-queue%d", dev->name, i);
1345 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1346 ehea_recv_irq_handler,
1347 IRQF_DISABLED, pr->int_send_name,
1348 pr);
1349 if (ret) {
1350 ehea_error("failed registering irq for ehea_queue "
1351 "port_res_nr:%d, ist=%X", i,
1352 pr->eq->attr.ist1);
1353 goto out_free_req;
1354 }
1355 if (netif_msg_ifup(port))
1356 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1357 "%d registered", pr->eq->attr.ist1, i);
1358 }
1359 out:
1360 return ret;
1361
1362
1363 out_free_req:
1364 while (--i >= 0) {
1365 u32 ist = port->port_res[i].eq->attr.ist1;
1366 ibmebus_free_irq(ist, &port->port_res[i]);
1367 }
1368
1369 out_free_qpeq:
1370 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1371 i = port->num_def_qps;
1372
1373 goto out;
1374
1375 }
1376
1377 static void ehea_free_interrupts(struct net_device *dev)
1378 {
1379 struct ehea_port *port = netdev_priv(dev);
1380 struct ehea_port_res *pr;
1381 int i;
1382
1383 /* send */
1384
1385 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1386 pr = &port->port_res[i];
1387 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1388 if (netif_msg_intr(port))
1389 ehea_info("free send irq for res %d with handle 0x%X",
1390 i, pr->eq->attr.ist1);
1391 }
1392
1393 /* associated events */
1394 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1395 if (netif_msg_intr(port))
1396 ehea_info("associated event interrupt for handle 0x%X freed",
1397 port->qp_eq->attr.ist1);
1398 }
1399
1400 static int ehea_configure_port(struct ehea_port *port)
1401 {
1402 int ret, i;
1403 u64 hret, mask;
1404 struct hcp_ehea_port_cb0 *cb0;
1405
1406 ret = -ENOMEM;
1407 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1408 if (!cb0)
1409 goto out;
1410
1411 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1412 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1413 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1414 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1415 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1416 PXLY_RC_VLAN_FILTER)
1417 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1418
1419 for (i = 0; i < port->num_mcs; i++)
1420 if (use_mcs)
1421 cb0->default_qpn_arr[i] =
1422 port->port_res[i].qp->init_attr.qp_nr;
1423 else
1424 cb0->default_qpn_arr[i] =
1425 port->port_res[0].qp->init_attr.qp_nr;
1426
1427 if (netif_msg_ifup(port))
1428 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1429
1430 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1431 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1432
1433 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1434 port->logical_port_id,
1435 H_PORT_CB0, mask, cb0);
1436 ret = -EIO;
1437 if (hret != H_SUCCESS)
1438 goto out_free;
1439
1440 ret = 0;
1441
1442 out_free:
1443 free_page((unsigned long)cb0);
1444 out:
1445 return ret;
1446 }
1447
1448 int ehea_gen_smrs(struct ehea_port_res *pr)
1449 {
1450 int ret;
1451 struct ehea_adapter *adapter = pr->port->adapter;
1452
1453 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1454 if (ret)
1455 goto out;
1456
1457 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1458 if (ret)
1459 goto out_free;
1460
1461 return 0;
1462
1463 out_free:
1464 ehea_rem_mr(&pr->send_mr);
1465 out:
1466 ehea_error("Generating SMRS failed\n");
1467 return -EIO;
1468 }
1469
1470 int ehea_rem_smrs(struct ehea_port_res *pr)
1471 {
1472 if ((ehea_rem_mr(&pr->send_mr)) ||
1473 (ehea_rem_mr(&pr->recv_mr)))
1474 return -EIO;
1475 else
1476 return 0;
1477 }
1478
1479 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1480 {
1481 int arr_size = sizeof(void *) * max_q_entries;
1482
1483 q_skba->arr = vmalloc(arr_size);
1484 if (!q_skba->arr)
1485 return -ENOMEM;
1486
1487 memset(q_skba->arr, 0, arr_size);
1488
1489 q_skba->len = max_q_entries;
1490 q_skba->index = 0;
1491 q_skba->os_skbs = 0;
1492
1493 return 0;
1494 }
1495
1496 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1497 struct port_res_cfg *pr_cfg, int queue_token)
1498 {
1499 struct ehea_adapter *adapter = port->adapter;
1500 enum ehea_eq_type eq_type = EHEA_EQ;
1501 struct ehea_qp_init_attr *init_attr = NULL;
1502 int ret = -EIO;
1503
1504 memset(pr, 0, sizeof(struct ehea_port_res));
1505
1506 pr->port = port;
1507 spin_lock_init(&pr->xmit_lock);
1508 spin_lock_init(&pr->netif_queue);
1509
1510 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1511 if (!pr->eq) {
1512 ehea_error("create_eq failed (eq)");
1513 goto out_free;
1514 }
1515
1516 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1517 pr->eq->fw_handle,
1518 port->logical_port_id);
1519 if (!pr->recv_cq) {
1520 ehea_error("create_cq failed (cq_recv)");
1521 goto out_free;
1522 }
1523
1524 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1525 pr->eq->fw_handle,
1526 port->logical_port_id);
1527 if (!pr->send_cq) {
1528 ehea_error("create_cq failed (cq_send)");
1529 goto out_free;
1530 }
1531
1532 if (netif_msg_ifup(port))
1533 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1534 pr->send_cq->attr.act_nr_of_cqes,
1535 pr->recv_cq->attr.act_nr_of_cqes);
1536
1537 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1538 if (!init_attr) {
1539 ret = -ENOMEM;
1540 ehea_error("no mem for ehea_qp_init_attr");
1541 goto out_free;
1542 }
1543
1544 init_attr->low_lat_rq1 = 1;
1545 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1546 init_attr->rq_count = 3;
1547 init_attr->qp_token = queue_token;
1548 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1549 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1550 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1551 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1552 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1553 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1554 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1555 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1556 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1557 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1558 init_attr->port_nr = port->logical_port_id;
1559 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1560 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1561 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1562
1563 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1564 if (!pr->qp) {
1565 ehea_error("create_qp failed");
1566 ret = -EIO;
1567 goto out_free;
1568 }
1569
1570 if (netif_msg_ifup(port))
1571 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1572 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1573 init_attr->act_nr_send_wqes,
1574 init_attr->act_nr_rwqes_rq1,
1575 init_attr->act_nr_rwqes_rq2,
1576 init_attr->act_nr_rwqes_rq3);
1577
1578 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1579
1580 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1581 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1582 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1583 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1584 if (ret)
1585 goto out_free;
1586
1587 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1588 if (ehea_gen_smrs(pr) != 0) {
1589 ret = -EIO;
1590 goto out_free;
1591 }
1592
1593 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1594
1595 kfree(init_attr);
1596
1597 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1598
1599 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1600 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1601 pr->lro_mgr.lro_arr = pr->lro_desc;
1602 pr->lro_mgr.get_skb_header = get_skb_hdr;
1603 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1604 pr->lro_mgr.dev = port->netdev;
1605 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1606 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1607
1608 ret = 0;
1609 goto out;
1610
1611 out_free:
1612 kfree(init_attr);
1613 vfree(pr->sq_skba.arr);
1614 vfree(pr->rq1_skba.arr);
1615 vfree(pr->rq2_skba.arr);
1616 vfree(pr->rq3_skba.arr);
1617 ehea_destroy_qp(pr->qp);
1618 ehea_destroy_cq(pr->send_cq);
1619 ehea_destroy_cq(pr->recv_cq);
1620 ehea_destroy_eq(pr->eq);
1621 out:
1622 return ret;
1623 }
1624
1625 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1626 {
1627 int ret, i;
1628
1629 if (pr->qp)
1630 netif_napi_del(&pr->napi);
1631
1632 ret = ehea_destroy_qp(pr->qp);
1633
1634 if (!ret) {
1635 ehea_destroy_cq(pr->send_cq);
1636 ehea_destroy_cq(pr->recv_cq);
1637 ehea_destroy_eq(pr->eq);
1638
1639 for (i = 0; i < pr->rq1_skba.len; i++)
1640 if (pr->rq1_skba.arr[i])
1641 dev_kfree_skb(pr->rq1_skba.arr[i]);
1642
1643 for (i = 0; i < pr->rq2_skba.len; i++)
1644 if (pr->rq2_skba.arr[i])
1645 dev_kfree_skb(pr->rq2_skba.arr[i]);
1646
1647 for (i = 0; i < pr->rq3_skba.len; i++)
1648 if (pr->rq3_skba.arr[i])
1649 dev_kfree_skb(pr->rq3_skba.arr[i]);
1650
1651 for (i = 0; i < pr->sq_skba.len; i++)
1652 if (pr->sq_skba.arr[i])
1653 dev_kfree_skb(pr->sq_skba.arr[i]);
1654
1655 vfree(pr->rq1_skba.arr);
1656 vfree(pr->rq2_skba.arr);
1657 vfree(pr->rq3_skba.arr);
1658 vfree(pr->sq_skba.arr);
1659 ret = ehea_rem_smrs(pr);
1660 }
1661 return ret;
1662 }
1663
1664 /*
1665 * The write_* functions store information in swqe which is used by
1666 * the hardware to calculate the ip/tcp/udp checksum
1667 */
1668
1669 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1670 const struct sk_buff *skb)
1671 {
1672 swqe->ip_start = skb_network_offset(skb);
1673 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1674 }
1675
1676 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1677 const struct sk_buff *skb)
1678 {
1679 swqe->tcp_offset =
1680 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1681
1682 swqe->tcp_end = (u16)skb->len - 1;
1683 }
1684
1685 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1686 const struct sk_buff *skb)
1687 {
1688 swqe->tcp_offset =
1689 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1690
1691 swqe->tcp_end = (u16)skb->len - 1;
1692 }
1693
1694
1695 static void write_swqe2_TSO(struct sk_buff *skb,
1696 struct ehea_swqe *swqe, u32 lkey)
1697 {
1698 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1699 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1700 int skb_data_size = skb_headlen(skb);
1701 int headersize;
1702
1703 /* Packet is TCP with TSO enabled */
1704 swqe->tx_control |= EHEA_SWQE_TSO;
1705 swqe->mss = skb_shinfo(skb)->gso_size;
1706 /* copy only eth/ip/tcp headers to immediate data and
1707 * the rest of skb->data to sg1entry
1708 */
1709 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1710
1711 skb_data_size = skb_headlen(skb);
1712
1713 if (skb_data_size >= headersize) {
1714 /* copy immediate data */
1715 skb_copy_from_linear_data(skb, imm_data, headersize);
1716 swqe->immediate_data_length = headersize;
1717
1718 if (skb_data_size > headersize) {
1719 /* set sg1entry data */
1720 sg1entry->l_key = lkey;
1721 sg1entry->len = skb_data_size - headersize;
1722 sg1entry->vaddr =
1723 ehea_map_vaddr(skb->data + headersize);
1724 swqe->descriptors++;
1725 }
1726 } else
1727 ehea_error("cannot handle fragmented headers");
1728 }
1729
1730 static void write_swqe2_nonTSO(struct sk_buff *skb,
1731 struct ehea_swqe *swqe, u32 lkey)
1732 {
1733 int skb_data_size = skb_headlen(skb);
1734 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1735 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1736
1737 /* Packet is any nonTSO type
1738 *
1739 * Copy as much as possible skb->data to immediate data and
1740 * the rest to sg1entry
1741 */
1742 if (skb_data_size >= SWQE2_MAX_IMM) {
1743 /* copy immediate data */
1744 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1745
1746 swqe->immediate_data_length = SWQE2_MAX_IMM;
1747
1748 if (skb_data_size > SWQE2_MAX_IMM) {
1749 /* copy sg1entry data */
1750 sg1entry->l_key = lkey;
1751 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1752 sg1entry->vaddr =
1753 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1754 swqe->descriptors++;
1755 }
1756 } else {
1757 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1758 swqe->immediate_data_length = skb_data_size;
1759 }
1760 }
1761
1762 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1763 struct ehea_swqe *swqe, u32 lkey)
1764 {
1765 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1766 skb_frag_t *frag;
1767 int nfrags, sg1entry_contains_frag_data, i;
1768
1769 nfrags = skb_shinfo(skb)->nr_frags;
1770 sg1entry = &swqe->u.immdata_desc.sg_entry;
1771 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1772 swqe->descriptors = 0;
1773 sg1entry_contains_frag_data = 0;
1774
1775 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1776 write_swqe2_TSO(skb, swqe, lkey);
1777 else
1778 write_swqe2_nonTSO(skb, swqe, lkey);
1779
1780 /* write descriptors */
1781 if (nfrags > 0) {
1782 if (swqe->descriptors == 0) {
1783 /* sg1entry not yet used */
1784 frag = &skb_shinfo(skb)->frags[0];
1785
1786 /* copy sg1entry data */
1787 sg1entry->l_key = lkey;
1788 sg1entry->len = frag->size;
1789 sg1entry->vaddr =
1790 ehea_map_vaddr(page_address(frag->page)
1791 + frag->page_offset);
1792 swqe->descriptors++;
1793 sg1entry_contains_frag_data = 1;
1794 }
1795
1796 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1797
1798 frag = &skb_shinfo(skb)->frags[i];
1799 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1800
1801 sgentry->l_key = lkey;
1802 sgentry->len = frag->size;
1803 sgentry->vaddr =
1804 ehea_map_vaddr(page_address(frag->page)
1805 + frag->page_offset);
1806 swqe->descriptors++;
1807 }
1808 }
1809 }
1810
1811 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1812 {
1813 int ret = 0;
1814 u64 hret;
1815 u8 reg_type;
1816
1817 /* De/Register untagged packets */
1818 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1819 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1820 port->logical_port_id,
1821 reg_type, port->mac_addr, 0, hcallid);
1822 if (hret != H_SUCCESS) {
1823 ehea_error("%sregistering bc address failed (tagged)",
1824 hcallid == H_REG_BCMC ? "" : "de");
1825 ret = -EIO;
1826 goto out_herr;
1827 }
1828
1829 /* De/Register VLAN packets */
1830 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1831 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1832 port->logical_port_id,
1833 reg_type, port->mac_addr, 0, hcallid);
1834 if (hret != H_SUCCESS) {
1835 ehea_error("%sregistering bc address failed (vlan)",
1836 hcallid == H_REG_BCMC ? "" : "de");
1837 ret = -EIO;
1838 }
1839 out_herr:
1840 return ret;
1841 }
1842
1843 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1844 {
1845 struct ehea_port *port = netdev_priv(dev);
1846 struct sockaddr *mac_addr = sa;
1847 struct hcp_ehea_port_cb0 *cb0;
1848 int ret;
1849 u64 hret;
1850
1851 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1852 ret = -EADDRNOTAVAIL;
1853 goto out;
1854 }
1855
1856 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1857 if (!cb0) {
1858 ehea_error("no mem for cb0");
1859 ret = -ENOMEM;
1860 goto out;
1861 }
1862
1863 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1864
1865 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1866
1867 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1868 port->logical_port_id, H_PORT_CB0,
1869 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1870 if (hret != H_SUCCESS) {
1871 ret = -EIO;
1872 goto out_free;
1873 }
1874
1875 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1876
1877 /* Deregister old MAC in pHYP */
1878 if (port->state == EHEA_PORT_UP) {
1879 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1880 if (ret)
1881 goto out_upregs;
1882 }
1883
1884 port->mac_addr = cb0->port_mac_addr << 16;
1885
1886 /* Register new MAC in pHYP */
1887 if (port->state == EHEA_PORT_UP) {
1888 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1889 if (ret)
1890 goto out_upregs;
1891 }
1892
1893 ret = 0;
1894
1895 out_upregs:
1896 ehea_update_bcmc_registrations();
1897 out_free:
1898 free_page((unsigned long)cb0);
1899 out:
1900 return ret;
1901 }
1902
1903 static void ehea_promiscuous_error(u64 hret, int enable)
1904 {
1905 if (hret == H_AUTHORITY)
1906 ehea_info("Hypervisor denied %sabling promiscuous mode",
1907 enable == 1 ? "en" : "dis");
1908 else
1909 ehea_error("failed %sabling promiscuous mode",
1910 enable == 1 ? "en" : "dis");
1911 }
1912
1913 static void ehea_promiscuous(struct net_device *dev, int enable)
1914 {
1915 struct ehea_port *port = netdev_priv(dev);
1916 struct hcp_ehea_port_cb7 *cb7;
1917 u64 hret;
1918
1919 if ((enable && port->promisc) || (!enable && !port->promisc))
1920 return;
1921
1922 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1923 if (!cb7) {
1924 ehea_error("no mem for cb7");
1925 goto out;
1926 }
1927
1928 /* Modify Pxs_DUCQPN in CB7 */
1929 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1930
1931 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1932 port->logical_port_id,
1933 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1934 if (hret) {
1935 ehea_promiscuous_error(hret, enable);
1936 goto out;
1937 }
1938
1939 port->promisc = enable;
1940 out:
1941 free_page((unsigned long)cb7);
1942 }
1943
1944 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1945 u32 hcallid)
1946 {
1947 u64 hret;
1948 u8 reg_type;
1949
1950 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1951 | EHEA_BCMC_UNTAGGED;
1952
1953 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1954 port->logical_port_id,
1955 reg_type, mc_mac_addr, 0, hcallid);
1956 if (hret)
1957 goto out;
1958
1959 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1960 | EHEA_BCMC_VLANID_ALL;
1961
1962 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1963 port->logical_port_id,
1964 reg_type, mc_mac_addr, 0, hcallid);
1965 out:
1966 return hret;
1967 }
1968
1969 static int ehea_drop_multicast_list(struct net_device *dev)
1970 {
1971 struct ehea_port *port = netdev_priv(dev);
1972 struct ehea_mc_list *mc_entry = port->mc_list;
1973 struct list_head *pos;
1974 struct list_head *temp;
1975 int ret = 0;
1976 u64 hret;
1977
1978 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1979 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1980
1981 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1982 H_DEREG_BCMC);
1983 if (hret) {
1984 ehea_error("failed deregistering mcast MAC");
1985 ret = -EIO;
1986 }
1987
1988 list_del(pos);
1989 kfree(mc_entry);
1990 }
1991 return ret;
1992 }
1993
1994 static void ehea_allmulti(struct net_device *dev, int enable)
1995 {
1996 struct ehea_port *port = netdev_priv(dev);
1997 u64 hret;
1998
1999 if (!port->allmulti) {
2000 if (enable) {
2001 /* Enable ALLMULTI */
2002 ehea_drop_multicast_list(dev);
2003 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2004 if (!hret)
2005 port->allmulti = 1;
2006 else
2007 ehea_error("failed enabling IFF_ALLMULTI");
2008 }
2009 } else
2010 if (!enable) {
2011 /* Disable ALLMULTI */
2012 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2013 if (!hret)
2014 port->allmulti = 0;
2015 else
2016 ehea_error("failed disabling IFF_ALLMULTI");
2017 }
2018 }
2019
2020 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2021 {
2022 struct ehea_mc_list *ehea_mcl_entry;
2023 u64 hret;
2024
2025 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2026 if (!ehea_mcl_entry) {
2027 ehea_error("no mem for mcl_entry");
2028 return;
2029 }
2030
2031 INIT_LIST_HEAD(&ehea_mcl_entry->list);
2032
2033 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2034
2035 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2036 H_REG_BCMC);
2037 if (!hret)
2038 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2039 else {
2040 ehea_error("failed registering mcast MAC");
2041 kfree(ehea_mcl_entry);
2042 }
2043 }
2044
2045 static void ehea_set_multicast_list(struct net_device *dev)
2046 {
2047 struct ehea_port *port = netdev_priv(dev);
2048 struct netdev_hw_addr *ha;
2049 int ret;
2050
2051 if (dev->flags & IFF_PROMISC) {
2052 ehea_promiscuous(dev, 1);
2053 return;
2054 }
2055 ehea_promiscuous(dev, 0);
2056
2057 if (dev->flags & IFF_ALLMULTI) {
2058 ehea_allmulti(dev, 1);
2059 goto out;
2060 }
2061 ehea_allmulti(dev, 0);
2062
2063 if (!netdev_mc_empty(dev)) {
2064 ret = ehea_drop_multicast_list(dev);
2065 if (ret) {
2066 /* Dropping the current multicast list failed.
2067 * Enabling ALL_MULTI is the best we can do.
2068 */
2069 ehea_allmulti(dev, 1);
2070 }
2071
2072 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2073 ehea_info("Mcast registration limit reached (0x%llx). "
2074 "Use ALLMULTI!",
2075 port->adapter->max_mc_mac);
2076 goto out;
2077 }
2078
2079 netdev_for_each_mc_addr(ha, dev)
2080 ehea_add_multicast_entry(port, ha->addr);
2081
2082 }
2083 out:
2084 ehea_update_bcmc_registrations();
2085 }
2086
2087 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2088 {
2089 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2090 return -EINVAL;
2091 dev->mtu = new_mtu;
2092 return 0;
2093 }
2094
2095 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2096 struct ehea_swqe *swqe, u32 lkey)
2097 {
2098 if (skb->protocol == htons(ETH_P_IP)) {
2099 const struct iphdr *iph = ip_hdr(skb);
2100
2101 /* IPv4 */
2102 swqe->tx_control |= EHEA_SWQE_CRC
2103 | EHEA_SWQE_IP_CHECKSUM
2104 | EHEA_SWQE_TCP_CHECKSUM
2105 | EHEA_SWQE_IMM_DATA_PRESENT
2106 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2107
2108 write_ip_start_end(swqe, skb);
2109
2110 if (iph->protocol == IPPROTO_UDP) {
2111 if ((iph->frag_off & IP_MF) ||
2112 (iph->frag_off & IP_OFFSET))
2113 /* IP fragment, so don't change cs */
2114 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2115 else
2116 write_udp_offset_end(swqe, skb);
2117 } else if (iph->protocol == IPPROTO_TCP) {
2118 write_tcp_offset_end(swqe, skb);
2119 }
2120
2121 /* icmp (big data) and ip segmentation packets (all other ip
2122 packets) do not require any special handling */
2123
2124 } else {
2125 /* Other Ethernet Protocol */
2126 swqe->tx_control |= EHEA_SWQE_CRC
2127 | EHEA_SWQE_IMM_DATA_PRESENT
2128 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2129 }
2130
2131 write_swqe2_data(skb, dev, swqe, lkey);
2132 }
2133
2134 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2135 struct ehea_swqe *swqe)
2136 {
2137 int nfrags = skb_shinfo(skb)->nr_frags;
2138 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2139 skb_frag_t *frag;
2140 int i;
2141
2142 if (skb->protocol == htons(ETH_P_IP)) {
2143 const struct iphdr *iph = ip_hdr(skb);
2144
2145 /* IPv4 */
2146 write_ip_start_end(swqe, skb);
2147
2148 if (iph->protocol == IPPROTO_TCP) {
2149 swqe->tx_control |= EHEA_SWQE_CRC
2150 | EHEA_SWQE_IP_CHECKSUM
2151 | EHEA_SWQE_TCP_CHECKSUM
2152 | EHEA_SWQE_IMM_DATA_PRESENT;
2153
2154 write_tcp_offset_end(swqe, skb);
2155
2156 } else if (iph->protocol == IPPROTO_UDP) {
2157 if ((iph->frag_off & IP_MF) ||
2158 (iph->frag_off & IP_OFFSET))
2159 /* IP fragment, so don't change cs */
2160 swqe->tx_control |= EHEA_SWQE_CRC
2161 | EHEA_SWQE_IMM_DATA_PRESENT;
2162 else {
2163 swqe->tx_control |= EHEA_SWQE_CRC
2164 | EHEA_SWQE_IP_CHECKSUM
2165 | EHEA_SWQE_TCP_CHECKSUM
2166 | EHEA_SWQE_IMM_DATA_PRESENT;
2167
2168 write_udp_offset_end(swqe, skb);
2169 }
2170 } else {
2171 /* icmp (big data) and
2172 ip segmentation packets (all other ip packets) */
2173 swqe->tx_control |= EHEA_SWQE_CRC
2174 | EHEA_SWQE_IP_CHECKSUM
2175 | EHEA_SWQE_IMM_DATA_PRESENT;
2176 }
2177 } else {
2178 /* Other Ethernet Protocol */
2179 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2180 }
2181 /* copy (immediate) data */
2182 if (nfrags == 0) {
2183 /* data is in a single piece */
2184 skb_copy_from_linear_data(skb, imm_data, skb->len);
2185 } else {
2186 /* first copy data from the skb->data buffer ... */
2187 skb_copy_from_linear_data(skb, imm_data,
2188 skb_headlen(skb));
2189 imm_data += skb_headlen(skb);
2190
2191 /* ... then copy data from the fragments */
2192 for (i = 0; i < nfrags; i++) {
2193 frag = &skb_shinfo(skb)->frags[i];
2194 memcpy(imm_data,
2195 page_address(frag->page) + frag->page_offset,
2196 frag->size);
2197 imm_data += frag->size;
2198 }
2199 }
2200 swqe->immediate_data_length = skb->len;
2201 dev_kfree_skb(skb);
2202 }
2203
2204 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2205 {
2206 struct tcphdr *tcp;
2207 u32 tmp;
2208
2209 if ((skb->protocol == htons(ETH_P_IP)) &&
2210 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2211 tcp = (struct tcphdr *)(skb_network_header(skb) +
2212 (ip_hdr(skb)->ihl * 4));
2213 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2214 tmp += ip_hdr(skb)->daddr % 31;
2215 return tmp % num_qps;
2216 } else
2217 return 0;
2218 }
2219
2220 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2221 {
2222 struct ehea_port *port = netdev_priv(dev);
2223 struct ehea_swqe *swqe;
2224 unsigned long flags;
2225 u32 lkey;
2226 int swqe_index;
2227 struct ehea_port_res *pr;
2228
2229 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2230
2231 if (!spin_trylock(&pr->xmit_lock))
2232 return NETDEV_TX_BUSY;
2233
2234 if (pr->queue_stopped) {
2235 spin_unlock(&pr->xmit_lock);
2236 return NETDEV_TX_BUSY;
2237 }
2238
2239 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2240 memset(swqe, 0, SWQE_HEADER_SIZE);
2241 atomic_dec(&pr->swqe_avail);
2242
2243 if (skb->len <= SWQE3_MAX_IMM) {
2244 u32 sig_iv = port->sig_comp_iv;
2245 u32 swqe_num = pr->swqe_id_counter;
2246 ehea_xmit3(skb, dev, swqe);
2247 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2248 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2249 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2250 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2251 sig_iv);
2252 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2253 pr->swqe_ll_count = 0;
2254 } else
2255 pr->swqe_ll_count += 1;
2256 } else {
2257 swqe->wr_id =
2258 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2259 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2260 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2261 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2262 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2263
2264 pr->sq_skba.index++;
2265 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2266
2267 lkey = pr->send_mr.lkey;
2268 ehea_xmit2(skb, dev, swqe, lkey);
2269 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2270 }
2271 pr->swqe_id_counter += 1;
2272
2273 if (port->vgrp && vlan_tx_tag_present(skb)) {
2274 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2275 swqe->vlan_tag = vlan_tx_tag_get(skb);
2276 }
2277
2278 if (netif_msg_tx_queued(port)) {
2279 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2280 ehea_dump(swqe, 512, "swqe");
2281 }
2282
2283 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2284 netif_stop_queue(dev);
2285 swqe->tx_control |= EHEA_SWQE_PURGE;
2286 }
2287
2288 ehea_post_swqe(pr->qp, swqe);
2289 pr->tx_packets++;
2290
2291 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2292 spin_lock_irqsave(&pr->netif_queue, flags);
2293 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2294 pr->p_stats.queue_stopped++;
2295 netif_stop_queue(dev);
2296 pr->queue_stopped = 1;
2297 }
2298 spin_unlock_irqrestore(&pr->netif_queue, flags);
2299 }
2300 dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2301 spin_unlock(&pr->xmit_lock);
2302
2303 return NETDEV_TX_OK;
2304 }
2305
2306 static void ehea_vlan_rx_register(struct net_device *dev,
2307 struct vlan_group *grp)
2308 {
2309 struct ehea_port *port = netdev_priv(dev);
2310 struct ehea_adapter *adapter = port->adapter;
2311 struct hcp_ehea_port_cb1 *cb1;
2312 u64 hret;
2313
2314 port->vgrp = grp;
2315
2316 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2317 if (!cb1) {
2318 ehea_error("no mem for cb1");
2319 goto out;
2320 }
2321
2322 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2323 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2324 if (hret != H_SUCCESS)
2325 ehea_error("modify_ehea_port failed");
2326
2327 free_page((unsigned long)cb1);
2328 out:
2329 return;
2330 }
2331
2332 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2333 {
2334 struct ehea_port *port = netdev_priv(dev);
2335 struct ehea_adapter *adapter = port->adapter;
2336 struct hcp_ehea_port_cb1 *cb1;
2337 int index;
2338 u64 hret;
2339
2340 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2341 if (!cb1) {
2342 ehea_error("no mem for cb1");
2343 goto out;
2344 }
2345
2346 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2347 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2348 if (hret != H_SUCCESS) {
2349 ehea_error("query_ehea_port failed");
2350 goto out;
2351 }
2352
2353 index = (vid / 64);
2354 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2355
2356 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2357 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2358 if (hret != H_SUCCESS)
2359 ehea_error("modify_ehea_port failed");
2360 out:
2361 free_page((unsigned long)cb1);
2362 return;
2363 }
2364
2365 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2366 {
2367 struct ehea_port *port = netdev_priv(dev);
2368 struct ehea_adapter *adapter = port->adapter;
2369 struct hcp_ehea_port_cb1 *cb1;
2370 int index;
2371 u64 hret;
2372
2373 vlan_group_set_device(port->vgrp, vid, NULL);
2374
2375 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2376 if (!cb1) {
2377 ehea_error("no mem for cb1");
2378 goto out;
2379 }
2380
2381 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2382 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2383 if (hret != H_SUCCESS) {
2384 ehea_error("query_ehea_port failed");
2385 goto out;
2386 }
2387
2388 index = (vid / 64);
2389 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2390
2391 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2392 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2393 if (hret != H_SUCCESS)
2394 ehea_error("modify_ehea_port failed");
2395 out:
2396 free_page((unsigned long)cb1);
2397 }
2398
2399 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2400 {
2401 int ret = -EIO;
2402 u64 hret;
2403 u16 dummy16 = 0;
2404 u64 dummy64 = 0;
2405 struct hcp_modify_qp_cb0 *cb0;
2406
2407 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2408 if (!cb0) {
2409 ret = -ENOMEM;
2410 goto out;
2411 }
2412
2413 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2414 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2415 if (hret != H_SUCCESS) {
2416 ehea_error("query_ehea_qp failed (1)");
2417 goto out;
2418 }
2419
2420 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2421 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2422 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2423 &dummy64, &dummy64, &dummy16, &dummy16);
2424 if (hret != H_SUCCESS) {
2425 ehea_error("modify_ehea_qp failed (1)");
2426 goto out;
2427 }
2428
2429 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2430 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2431 if (hret != H_SUCCESS) {
2432 ehea_error("query_ehea_qp failed (2)");
2433 goto out;
2434 }
2435
2436 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2437 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2438 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2439 &dummy64, &dummy64, &dummy16, &dummy16);
2440 if (hret != H_SUCCESS) {
2441 ehea_error("modify_ehea_qp failed (2)");
2442 goto out;
2443 }
2444
2445 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2446 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2447 if (hret != H_SUCCESS) {
2448 ehea_error("query_ehea_qp failed (3)");
2449 goto out;
2450 }
2451
2452 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2453 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2454 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2455 &dummy64, &dummy64, &dummy16, &dummy16);
2456 if (hret != H_SUCCESS) {
2457 ehea_error("modify_ehea_qp failed (3)");
2458 goto out;
2459 }
2460
2461 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2462 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2463 if (hret != H_SUCCESS) {
2464 ehea_error("query_ehea_qp failed (4)");
2465 goto out;
2466 }
2467
2468 ret = 0;
2469 out:
2470 free_page((unsigned long)cb0);
2471 return ret;
2472 }
2473
2474 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2475 int add_tx_qps)
2476 {
2477 int ret, i;
2478 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2479 enum ehea_eq_type eq_type = EHEA_EQ;
2480
2481 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2482 EHEA_MAX_ENTRIES_EQ, 1);
2483 if (!port->qp_eq) {
2484 ret = -EINVAL;
2485 ehea_error("ehea_create_eq failed (qp_eq)");
2486 goto out_kill_eq;
2487 }
2488
2489 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2490 pr_cfg.max_entries_scq = sq_entries * 2;
2491 pr_cfg.max_entries_sq = sq_entries;
2492 pr_cfg.max_entries_rq1 = rq1_entries;
2493 pr_cfg.max_entries_rq2 = rq2_entries;
2494 pr_cfg.max_entries_rq3 = rq3_entries;
2495
2496 pr_cfg_small_rx.max_entries_rcq = 1;
2497 pr_cfg_small_rx.max_entries_scq = sq_entries;
2498 pr_cfg_small_rx.max_entries_sq = sq_entries;
2499 pr_cfg_small_rx.max_entries_rq1 = 1;
2500 pr_cfg_small_rx.max_entries_rq2 = 1;
2501 pr_cfg_small_rx.max_entries_rq3 = 1;
2502
2503 for (i = 0; i < def_qps; i++) {
2504 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2505 if (ret)
2506 goto out_clean_pr;
2507 }
2508 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2509 ret = ehea_init_port_res(port, &port->port_res[i],
2510 &pr_cfg_small_rx, i);
2511 if (ret)
2512 goto out_clean_pr;
2513 }
2514
2515 return 0;
2516
2517 out_clean_pr:
2518 while (--i >= 0)
2519 ehea_clean_portres(port, &port->port_res[i]);
2520
2521 out_kill_eq:
2522 ehea_destroy_eq(port->qp_eq);
2523 return ret;
2524 }
2525
2526 static int ehea_clean_all_portres(struct ehea_port *port)
2527 {
2528 int ret = 0;
2529 int i;
2530
2531 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2532 ret |= ehea_clean_portres(port, &port->port_res[i]);
2533
2534 ret |= ehea_destroy_eq(port->qp_eq);
2535
2536 return ret;
2537 }
2538
2539 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2540 {
2541 if (adapter->active_ports)
2542 return;
2543
2544 ehea_rem_mr(&adapter->mr);
2545 }
2546
2547 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2548 {
2549 if (adapter->active_ports)
2550 return 0;
2551
2552 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2553 }
2554
2555 static int ehea_up(struct net_device *dev)
2556 {
2557 int ret, i;
2558 struct ehea_port *port = netdev_priv(dev);
2559
2560 if (port->state == EHEA_PORT_UP)
2561 return 0;
2562
2563 ret = ehea_port_res_setup(port, port->num_def_qps,
2564 port->num_add_tx_qps);
2565 if (ret) {
2566 ehea_error("port_res_failed");
2567 goto out;
2568 }
2569
2570 /* Set default QP for this port */
2571 ret = ehea_configure_port(port);
2572 if (ret) {
2573 ehea_error("ehea_configure_port failed. ret:%d", ret);
2574 goto out_clean_pr;
2575 }
2576
2577 ret = ehea_reg_interrupts(dev);
2578 if (ret) {
2579 ehea_error("reg_interrupts failed. ret:%d", ret);
2580 goto out_clean_pr;
2581 }
2582
2583 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2584 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2585 if (ret) {
2586 ehea_error("activate_qp failed");
2587 goto out_free_irqs;
2588 }
2589 }
2590
2591 for (i = 0; i < port->num_def_qps; i++) {
2592 ret = ehea_fill_port_res(&port->port_res[i]);
2593 if (ret) {
2594 ehea_error("out_free_irqs");
2595 goto out_free_irqs;
2596 }
2597 }
2598
2599 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2600 if (ret) {
2601 ret = -EIO;
2602 goto out_free_irqs;
2603 }
2604
2605 port->state = EHEA_PORT_UP;
2606
2607 ret = 0;
2608 goto out;
2609
2610 out_free_irqs:
2611 ehea_free_interrupts(dev);
2612
2613 out_clean_pr:
2614 ehea_clean_all_portres(port);
2615 out:
2616 if (ret)
2617 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2618
2619 ehea_update_bcmc_registrations();
2620 ehea_update_firmware_handles();
2621
2622 return ret;
2623 }
2624
2625 static void port_napi_disable(struct ehea_port *port)
2626 {
2627 int i;
2628
2629 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2630 napi_disable(&port->port_res[i].napi);
2631 }
2632
2633 static void port_napi_enable(struct ehea_port *port)
2634 {
2635 int i;
2636
2637 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2638 napi_enable(&port->port_res[i].napi);
2639 }
2640
2641 static int ehea_open(struct net_device *dev)
2642 {
2643 int ret;
2644 struct ehea_port *port = netdev_priv(dev);
2645
2646 mutex_lock(&port->port_lock);
2647
2648 if (netif_msg_ifup(port))
2649 ehea_info("enabling port %s", dev->name);
2650
2651 ret = ehea_up(dev);
2652 if (!ret) {
2653 port_napi_enable(port);
2654 netif_start_queue(dev);
2655 }
2656
2657 mutex_unlock(&port->port_lock);
2658
2659 return ret;
2660 }
2661
2662 static int ehea_down(struct net_device *dev)
2663 {
2664 int ret;
2665 struct ehea_port *port = netdev_priv(dev);
2666
2667 if (port->state == EHEA_PORT_DOWN)
2668 return 0;
2669
2670 ehea_drop_multicast_list(dev);
2671 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2672
2673 ehea_free_interrupts(dev);
2674
2675 port->state = EHEA_PORT_DOWN;
2676
2677 ehea_update_bcmc_registrations();
2678
2679 ret = ehea_clean_all_portres(port);
2680 if (ret)
2681 ehea_info("Failed freeing resources for %s. ret=%i",
2682 dev->name, ret);
2683
2684 ehea_update_firmware_handles();
2685
2686 return ret;
2687 }
2688
2689 static int ehea_stop(struct net_device *dev)
2690 {
2691 int ret;
2692 struct ehea_port *port = netdev_priv(dev);
2693
2694 if (netif_msg_ifdown(port))
2695 ehea_info("disabling port %s", dev->name);
2696
2697 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2698 cancel_work_sync(&port->reset_task);
2699 mutex_lock(&port->port_lock);
2700 netif_stop_queue(dev);
2701 port_napi_disable(port);
2702 ret = ehea_down(dev);
2703 mutex_unlock(&port->port_lock);
2704 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2705 return ret;
2706 }
2707
2708 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2709 {
2710 struct ehea_qp qp = *orig_qp;
2711 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2712 struct ehea_swqe *swqe;
2713 int wqe_index;
2714 int i;
2715
2716 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2717 swqe = ehea_get_swqe(&qp, &wqe_index);
2718 swqe->tx_control |= EHEA_SWQE_PURGE;
2719 }
2720 }
2721
2722 static void ehea_flush_sq(struct ehea_port *port)
2723 {
2724 int i;
2725
2726 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2727 struct ehea_port_res *pr = &port->port_res[i];
2728 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2729 int k = 0;
2730 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2731 msleep(5);
2732 if (++k == 20) {
2733 ehea_error("WARNING: sq not flushed completely");
2734 break;
2735 }
2736 }
2737 }
2738 }
2739
2740 int ehea_stop_qps(struct net_device *dev)
2741 {
2742 struct ehea_port *port = netdev_priv(dev);
2743 struct ehea_adapter *adapter = port->adapter;
2744 struct hcp_modify_qp_cb0 *cb0;
2745 int ret = -EIO;
2746 int dret;
2747 int i;
2748 u64 hret;
2749 u64 dummy64 = 0;
2750 u16 dummy16 = 0;
2751
2752 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2753 if (!cb0) {
2754 ret = -ENOMEM;
2755 goto out;
2756 }
2757
2758 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2759 struct ehea_port_res *pr = &port->port_res[i];
2760 struct ehea_qp *qp = pr->qp;
2761
2762 /* Purge send queue */
2763 ehea_purge_sq(qp);
2764
2765 /* Disable queue pair */
2766 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2767 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2768 cb0);
2769 if (hret != H_SUCCESS) {
2770 ehea_error("query_ehea_qp failed (1)");
2771 goto out;
2772 }
2773
2774 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2775 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2776
2777 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2778 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2779 1), cb0, &dummy64,
2780 &dummy64, &dummy16, &dummy16);
2781 if (hret != H_SUCCESS) {
2782 ehea_error("modify_ehea_qp failed (1)");
2783 goto out;
2784 }
2785
2786 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2787 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2788 cb0);
2789 if (hret != H_SUCCESS) {
2790 ehea_error("query_ehea_qp failed (2)");
2791 goto out;
2792 }
2793
2794 /* deregister shared memory regions */
2795 dret = ehea_rem_smrs(pr);
2796 if (dret) {
2797 ehea_error("unreg shared memory region failed");
2798 goto out;
2799 }
2800 }
2801
2802 ret = 0;
2803 out:
2804 free_page((unsigned long)cb0);
2805
2806 return ret;
2807 }
2808
2809 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2810 {
2811 struct ehea_qp qp = *orig_qp;
2812 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2813 struct ehea_rwqe *rwqe;
2814 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2815 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2816 struct sk_buff *skb;
2817 u32 lkey = pr->recv_mr.lkey;
2818
2819
2820 int i;
2821 int index;
2822
2823 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2824 rwqe = ehea_get_next_rwqe(&qp, 2);
2825 rwqe->sg_list[0].l_key = lkey;
2826 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2827 skb = skba_rq2[index];
2828 if (skb)
2829 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2830 }
2831
2832 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2833 rwqe = ehea_get_next_rwqe(&qp, 3);
2834 rwqe->sg_list[0].l_key = lkey;
2835 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2836 skb = skba_rq3[index];
2837 if (skb)
2838 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2839 }
2840 }
2841
2842 int ehea_restart_qps(struct net_device *dev)
2843 {
2844 struct ehea_port *port = netdev_priv(dev);
2845 struct ehea_adapter *adapter = port->adapter;
2846 int ret = 0;
2847 int i;
2848
2849 struct hcp_modify_qp_cb0 *cb0;
2850 u64 hret;
2851 u64 dummy64 = 0;
2852 u16 dummy16 = 0;
2853
2854 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2855 if (!cb0) {
2856 ret = -ENOMEM;
2857 goto out;
2858 }
2859
2860 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2861 struct ehea_port_res *pr = &port->port_res[i];
2862 struct ehea_qp *qp = pr->qp;
2863
2864 ret = ehea_gen_smrs(pr);
2865 if (ret) {
2866 ehea_error("creation of shared memory regions failed");
2867 goto out;
2868 }
2869
2870 ehea_update_rqs(qp, pr);
2871
2872 /* Enable queue pair */
2873 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2874 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2875 cb0);
2876 if (hret != H_SUCCESS) {
2877 ehea_error("query_ehea_qp failed (1)");
2878 goto out;
2879 }
2880
2881 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2882 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2883
2884 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2885 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2886 1), cb0, &dummy64,
2887 &dummy64, &dummy16, &dummy16);
2888 if (hret != H_SUCCESS) {
2889 ehea_error("modify_ehea_qp failed (1)");
2890 goto out;
2891 }
2892
2893 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2894 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2895 cb0);
2896 if (hret != H_SUCCESS) {
2897 ehea_error("query_ehea_qp failed (2)");
2898 goto out;
2899 }
2900
2901 /* refill entire queue */
2902 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2903 ehea_refill_rq2(pr, 0);
2904 ehea_refill_rq3(pr, 0);
2905 }
2906 out:
2907 free_page((unsigned long)cb0);
2908
2909 return ret;
2910 }
2911
2912 static void ehea_reset_port(struct work_struct *work)
2913 {
2914 int ret;
2915 struct ehea_port *port =
2916 container_of(work, struct ehea_port, reset_task);
2917 struct net_device *dev = port->netdev;
2918
2919 mutex_lock(&dlpar_mem_lock);
2920 port->resets++;
2921 mutex_lock(&port->port_lock);
2922 netif_stop_queue(dev);
2923
2924 port_napi_disable(port);
2925
2926 ehea_down(dev);
2927
2928 ret = ehea_up(dev);
2929 if (ret)
2930 goto out;
2931
2932 ehea_set_multicast_list(dev);
2933
2934 if (netif_msg_timer(port))
2935 ehea_info("Device %s resetted successfully", dev->name);
2936
2937 port_napi_enable(port);
2938
2939 netif_wake_queue(dev);
2940 out:
2941 mutex_unlock(&port->port_lock);
2942 mutex_unlock(&dlpar_mem_lock);
2943 }
2944
2945 static void ehea_rereg_mrs(struct work_struct *work)
2946 {
2947 int ret, i;
2948 struct ehea_adapter *adapter;
2949
2950 ehea_info("LPAR memory changed - re-initializing driver");
2951
2952 list_for_each_entry(adapter, &adapter_list, list)
2953 if (adapter->active_ports) {
2954 /* Shutdown all ports */
2955 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2956 struct ehea_port *port = adapter->port[i];
2957 struct net_device *dev;
2958
2959 if (!port)
2960 continue;
2961
2962 dev = port->netdev;
2963
2964 if (dev->flags & IFF_UP) {
2965 mutex_lock(&port->port_lock);
2966 netif_stop_queue(dev);
2967 ehea_flush_sq(port);
2968 ret = ehea_stop_qps(dev);
2969 if (ret) {
2970 mutex_unlock(&port->port_lock);
2971 goto out;
2972 }
2973 port_napi_disable(port);
2974 mutex_unlock(&port->port_lock);
2975 }
2976 reset_sq_restart_flag(port);
2977 }
2978
2979 /* Unregister old memory region */
2980 ret = ehea_rem_mr(&adapter->mr);
2981 if (ret) {
2982 ehea_error("unregister MR failed - driver"
2983 " inoperable!");
2984 goto out;
2985 }
2986 }
2987
2988 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2989
2990 list_for_each_entry(adapter, &adapter_list, list)
2991 if (adapter->active_ports) {
2992 /* Register new memory region */
2993 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2994 if (ret) {
2995 ehea_error("register MR failed - driver"
2996 " inoperable!");
2997 goto out;
2998 }
2999
3000 /* Restart all ports */
3001 for (i = 0; i < EHEA_MAX_PORTS; i++) {
3002 struct ehea_port *port = adapter->port[i];
3003
3004 if (port) {
3005 struct net_device *dev = port->netdev;
3006
3007 if (dev->flags & IFF_UP) {
3008 mutex_lock(&port->port_lock);
3009 port_napi_enable(port);
3010 ret = ehea_restart_qps(dev);
3011 check_sqs(port);
3012 if (!ret)
3013 netif_wake_queue(dev);
3014 mutex_unlock(&port->port_lock);
3015 }
3016 }
3017 }
3018 }
3019 ehea_info("re-initializing driver complete");
3020 out:
3021 return;
3022 }
3023
3024 static void ehea_tx_watchdog(struct net_device *dev)
3025 {
3026 struct ehea_port *port = netdev_priv(dev);
3027
3028 if (netif_carrier_ok(dev) &&
3029 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3030 ehea_schedule_port_reset(port);
3031 }
3032
3033 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3034 {
3035 struct hcp_query_ehea *cb;
3036 u64 hret;
3037 int ret;
3038
3039 cb = (void *)get_zeroed_page(GFP_KERNEL);
3040 if (!cb) {
3041 ret = -ENOMEM;
3042 goto out;
3043 }
3044
3045 hret = ehea_h_query_ehea(adapter->handle, cb);
3046
3047 if (hret != H_SUCCESS) {
3048 ret = -EIO;
3049 goto out_herr;
3050 }
3051
3052 adapter->max_mc_mac = cb->max_mc_mac - 1;
3053 ret = 0;
3054
3055 out_herr:
3056 free_page((unsigned long)cb);
3057 out:
3058 return ret;
3059 }
3060
3061 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3062 {
3063 struct hcp_ehea_port_cb4 *cb4;
3064 u64 hret;
3065 int ret = 0;
3066
3067 *jumbo = 0;
3068
3069 /* (Try to) enable *jumbo frames */
3070 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3071 if (!cb4) {
3072 ehea_error("no mem for cb4");
3073 ret = -ENOMEM;
3074 goto out;
3075 } else {
3076 hret = ehea_h_query_ehea_port(port->adapter->handle,
3077 port->logical_port_id,
3078 H_PORT_CB4,
3079 H_PORT_CB4_JUMBO, cb4);
3080 if (hret == H_SUCCESS) {
3081 if (cb4->jumbo_frame)
3082 *jumbo = 1;
3083 else {
3084 cb4->jumbo_frame = 1;
3085 hret = ehea_h_modify_ehea_port(port->adapter->
3086 handle,
3087 port->
3088 logical_port_id,
3089 H_PORT_CB4,
3090 H_PORT_CB4_JUMBO,
3091 cb4);
3092 if (hret == H_SUCCESS)
3093 *jumbo = 1;
3094 }
3095 } else
3096 ret = -EINVAL;
3097
3098 free_page((unsigned long)cb4);
3099 }
3100 out:
3101 return ret;
3102 }
3103
3104 static ssize_t ehea_show_port_id(struct device *dev,
3105 struct device_attribute *attr, char *buf)
3106 {
3107 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3108 return sprintf(buf, "%d", port->logical_port_id);
3109 }
3110
3111 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3112 NULL);
3113
3114 static void __devinit logical_port_release(struct device *dev)
3115 {
3116 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3117 of_node_put(port->ofdev.dev.of_node);
3118 }
3119
3120 static struct device *ehea_register_port(struct ehea_port *port,
3121 struct device_node *dn)
3122 {
3123 int ret;
3124
3125 port->ofdev.dev.of_node = of_node_get(dn);
3126 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3127 port->ofdev.dev.bus = &ibmebus_bus_type;
3128
3129 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3130 port->ofdev.dev.release = logical_port_release;
3131
3132 ret = of_device_register(&port->ofdev);
3133 if (ret) {
3134 ehea_error("failed to register device. ret=%d", ret);
3135 goto out;
3136 }
3137
3138 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3139 if (ret) {
3140 ehea_error("failed to register attributes, ret=%d", ret);
3141 goto out_unreg_of_dev;
3142 }
3143
3144 return &port->ofdev.dev;
3145
3146 out_unreg_of_dev:
3147 of_device_unregister(&port->ofdev);
3148 out:
3149 return NULL;
3150 }
3151
3152 static void ehea_unregister_port(struct ehea_port *port)
3153 {
3154 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3155 of_device_unregister(&port->ofdev);
3156 }
3157
3158 static const struct net_device_ops ehea_netdev_ops = {
3159 .ndo_open = ehea_open,
3160 .ndo_stop = ehea_stop,
3161 .ndo_start_xmit = ehea_start_xmit,
3162 #ifdef CONFIG_NET_POLL_CONTROLLER
3163 .ndo_poll_controller = ehea_netpoll,
3164 #endif
3165 .ndo_get_stats = ehea_get_stats,
3166 .ndo_set_mac_address = ehea_set_mac_addr,
3167 .ndo_validate_addr = eth_validate_addr,
3168 .ndo_set_multicast_list = ehea_set_multicast_list,
3169 .ndo_change_mtu = ehea_change_mtu,
3170 .ndo_vlan_rx_register = ehea_vlan_rx_register,
3171 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
3172 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
3173 .ndo_tx_timeout = ehea_tx_watchdog,
3174 };
3175
3176 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3177 u32 logical_port_id,
3178 struct device_node *dn)
3179 {
3180 int ret;
3181 struct net_device *dev;
3182 struct ehea_port *port;
3183 struct device *port_dev;
3184 int jumbo;
3185
3186 /* allocate memory for the port structures */
3187 dev = alloc_etherdev(sizeof(struct ehea_port));
3188
3189 if (!dev) {
3190 ehea_error("no mem for net_device");
3191 ret = -ENOMEM;
3192 goto out_err;
3193 }
3194
3195 port = netdev_priv(dev);
3196
3197 mutex_init(&port->port_lock);
3198 port->state = EHEA_PORT_DOWN;
3199 port->sig_comp_iv = sq_entries / 10;
3200
3201 port->adapter = adapter;
3202 port->netdev = dev;
3203 port->logical_port_id = logical_port_id;
3204
3205 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3206
3207 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3208 if (!port->mc_list) {
3209 ret = -ENOMEM;
3210 goto out_free_ethdev;
3211 }
3212
3213 INIT_LIST_HEAD(&port->mc_list->list);
3214
3215 ret = ehea_sense_port_attr(port);
3216 if (ret)
3217 goto out_free_mc_list;
3218
3219 port_dev = ehea_register_port(port, dn);
3220 if (!port_dev)
3221 goto out_free_mc_list;
3222
3223 SET_NETDEV_DEV(dev, port_dev);
3224
3225 /* initialize net_device structure */
3226 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3227
3228 dev->netdev_ops = &ehea_netdev_ops;
3229 ehea_set_ethtool_ops(dev);
3230
3231 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3232 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3233 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3234 | NETIF_F_LLTX;
3235 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3236
3237 INIT_WORK(&port->reset_task, ehea_reset_port);
3238
3239 ret = register_netdev(dev);
3240 if (ret) {
3241 ehea_error("register_netdev failed. ret=%d", ret);
3242 goto out_unreg_port;
3243 }
3244
3245 port->lro_max_aggr = lro_max_aggr;
3246
3247 ret = ehea_get_jumboframe_status(port, &jumbo);
3248 if (ret)
3249 ehea_error("failed determining jumbo frame status for %s",
3250 port->netdev->name);
3251
3252 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3253 jumbo == 1 ? "en" : "dis");
3254
3255 adapter->active_ports++;
3256
3257 return port;
3258
3259 out_unreg_port:
3260 ehea_unregister_port(port);
3261
3262 out_free_mc_list:
3263 kfree(port->mc_list);
3264
3265 out_free_ethdev:
3266 free_netdev(dev);
3267
3268 out_err:
3269 ehea_error("setting up logical port with id=%d failed, ret=%d",
3270 logical_port_id, ret);
3271 return NULL;
3272 }
3273
3274 static void ehea_shutdown_single_port(struct ehea_port *port)
3275 {
3276 struct ehea_adapter *adapter = port->adapter;
3277 unregister_netdev(port->netdev);
3278 ehea_unregister_port(port);
3279 kfree(port->mc_list);
3280 free_netdev(port->netdev);
3281 adapter->active_ports--;
3282 }
3283
3284 static int ehea_setup_ports(struct ehea_adapter *adapter)
3285 {
3286 struct device_node *lhea_dn;
3287 struct device_node *eth_dn = NULL;
3288
3289 const u32 *dn_log_port_id;
3290 int i = 0;
3291
3292 lhea_dn = adapter->ofdev->dev.of_node;
3293 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3294
3295 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3296 NULL);
3297 if (!dn_log_port_id) {
3298 ehea_error("bad device node: eth_dn name=%s",
3299 eth_dn->full_name);
3300 continue;
3301 }
3302
3303 if (ehea_add_adapter_mr(adapter)) {
3304 ehea_error("creating MR failed");
3305 of_node_put(eth_dn);
3306 return -EIO;
3307 }
3308
3309 adapter->port[i] = ehea_setup_single_port(adapter,
3310 *dn_log_port_id,
3311 eth_dn);
3312 if (adapter->port[i])
3313 ehea_info("%s -> logical port id #%d",
3314 adapter->port[i]->netdev->name,
3315 *dn_log_port_id);
3316 else
3317 ehea_remove_adapter_mr(adapter);
3318
3319 i++;
3320 }
3321 return 0;
3322 }
3323
3324 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3325 u32 logical_port_id)
3326 {
3327 struct device_node *lhea_dn;
3328 struct device_node *eth_dn = NULL;
3329 const u32 *dn_log_port_id;
3330
3331 lhea_dn = adapter->ofdev->dev.of_node;
3332 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3333
3334 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3335 NULL);
3336 if (dn_log_port_id)
3337 if (*dn_log_port_id == logical_port_id)
3338 return eth_dn;
3339 }
3340
3341 return NULL;
3342 }
3343
3344 static ssize_t ehea_probe_port(struct device *dev,
3345 struct device_attribute *attr,
3346 const char *buf, size_t count)
3347 {
3348 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3349 struct ehea_port *port;
3350 struct device_node *eth_dn = NULL;
3351 int i;
3352
3353 u32 logical_port_id;
3354
3355 sscanf(buf, "%d", &logical_port_id);
3356
3357 port = ehea_get_port(adapter, logical_port_id);
3358
3359 if (port) {
3360 ehea_info("adding port with logical port id=%d failed. port "
3361 "already configured as %s.", logical_port_id,
3362 port->netdev->name);
3363 return -EINVAL;
3364 }
3365
3366 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3367
3368 if (!eth_dn) {
3369 ehea_info("no logical port with id %d found", logical_port_id);
3370 return -EINVAL;
3371 }
3372
3373 if (ehea_add_adapter_mr(adapter)) {
3374 ehea_error("creating MR failed");
3375 return -EIO;
3376 }
3377
3378 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3379
3380 of_node_put(eth_dn);
3381
3382 if (port) {
3383 for (i = 0; i < EHEA_MAX_PORTS; i++)
3384 if (!adapter->port[i]) {
3385 adapter->port[i] = port;
3386 break;
3387 }
3388
3389 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3390 logical_port_id);
3391 } else {
3392 ehea_remove_adapter_mr(adapter);
3393 return -EIO;
3394 }
3395
3396 return (ssize_t) count;
3397 }
3398
3399 static ssize_t ehea_remove_port(struct device *dev,
3400 struct device_attribute *attr,
3401 const char *buf, size_t count)
3402 {
3403 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3404 struct ehea_port *port;
3405 int i;
3406 u32 logical_port_id;
3407
3408 sscanf(buf, "%d", &logical_port_id);
3409
3410 port = ehea_get_port(adapter, logical_port_id);
3411
3412 if (port) {
3413 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3414 logical_port_id);
3415
3416 ehea_shutdown_single_port(port);
3417
3418 for (i = 0; i < EHEA_MAX_PORTS; i++)
3419 if (adapter->port[i] == port) {
3420 adapter->port[i] = NULL;
3421 break;
3422 }
3423 } else {
3424 ehea_error("removing port with logical port id=%d failed. port "
3425 "not configured.", logical_port_id);
3426 return -EINVAL;
3427 }
3428
3429 ehea_remove_adapter_mr(adapter);
3430
3431 return (ssize_t) count;
3432 }
3433
3434 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3435 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3436
3437 int ehea_create_device_sysfs(struct of_device *dev)
3438 {
3439 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3440 if (ret)
3441 goto out;
3442
3443 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3444 out:
3445 return ret;
3446 }
3447
3448 void ehea_remove_device_sysfs(struct of_device *dev)
3449 {
3450 device_remove_file(&dev->dev, &dev_attr_probe_port);
3451 device_remove_file(&dev->dev, &dev_attr_remove_port);
3452 }
3453
3454 static int __devinit ehea_probe_adapter(struct of_device *dev,
3455 const struct of_device_id *id)
3456 {
3457 struct ehea_adapter *adapter;
3458 const u64 *adapter_handle;
3459 int ret;
3460
3461 if (!dev || !dev->dev.of_node) {
3462 ehea_error("Invalid ibmebus device probed");
3463 return -EINVAL;
3464 }
3465
3466 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3467 if (!adapter) {
3468 ret = -ENOMEM;
3469 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3470 goto out;
3471 }
3472
3473 list_add(&adapter->list, &adapter_list);
3474
3475 adapter->ofdev = dev;
3476
3477 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3478 NULL);
3479 if (adapter_handle)
3480 adapter->handle = *adapter_handle;
3481
3482 if (!adapter->handle) {
3483 dev_err(&dev->dev, "failed getting handle for adapter"
3484 " '%s'\n", dev->dev.of_node->full_name);
3485 ret = -ENODEV;
3486 goto out_free_ad;
3487 }
3488
3489 adapter->pd = EHEA_PD_ID;
3490
3491 dev_set_drvdata(&dev->dev, adapter);
3492
3493
3494 /* initialize adapter and ports */
3495 /* get adapter properties */
3496 ret = ehea_sense_adapter_attr(adapter);
3497 if (ret) {
3498 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3499 goto out_free_ad;
3500 }
3501
3502 adapter->neq = ehea_create_eq(adapter,
3503 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3504 if (!adapter->neq) {
3505 ret = -EIO;
3506 dev_err(&dev->dev, "NEQ creation failed\n");
3507 goto out_free_ad;
3508 }
3509
3510 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3511 (unsigned long)adapter);
3512
3513 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3514 ehea_interrupt_neq, IRQF_DISABLED,
3515 "ehea_neq", adapter);
3516 if (ret) {
3517 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3518 goto out_kill_eq;
3519 }
3520
3521 ret = ehea_create_device_sysfs(dev);
3522 if (ret)
3523 goto out_free_irq;
3524
3525 ret = ehea_setup_ports(adapter);
3526 if (ret) {
3527 dev_err(&dev->dev, "setup_ports failed\n");
3528 goto out_rem_dev_sysfs;
3529 }
3530
3531 ret = 0;
3532 goto out;
3533
3534 out_rem_dev_sysfs:
3535 ehea_remove_device_sysfs(dev);
3536
3537 out_free_irq:
3538 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3539
3540 out_kill_eq:
3541 ehea_destroy_eq(adapter->neq);
3542
3543 out_free_ad:
3544 list_del(&adapter->list);
3545 kfree(adapter);
3546
3547 out:
3548 ehea_update_firmware_handles();
3549
3550 return ret;
3551 }
3552
3553 static int __devexit ehea_remove(struct of_device *dev)
3554 {
3555 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3556 int i;
3557
3558 for (i = 0; i < EHEA_MAX_PORTS; i++)
3559 if (adapter->port[i]) {
3560 ehea_shutdown_single_port(adapter->port[i]);
3561 adapter->port[i] = NULL;
3562 }
3563
3564 ehea_remove_device_sysfs(dev);
3565
3566 flush_scheduled_work();
3567
3568 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3569 tasklet_kill(&adapter->neq_tasklet);
3570
3571 ehea_destroy_eq(adapter->neq);
3572 ehea_remove_adapter_mr(adapter);
3573 list_del(&adapter->list);
3574 kfree(adapter);
3575
3576 ehea_update_firmware_handles();
3577
3578 return 0;
3579 }
3580
3581 void ehea_crash_handler(void)
3582 {
3583 int i;
3584
3585 if (ehea_fw_handles.arr)
3586 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3587 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3588 ehea_fw_handles.arr[i].fwh,
3589 FORCE_FREE);
3590
3591 if (ehea_bcmc_regs.arr)
3592 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3593 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3594 ehea_bcmc_regs.arr[i].port_id,
3595 ehea_bcmc_regs.arr[i].reg_type,
3596 ehea_bcmc_regs.arr[i].macaddr,
3597 0, H_DEREG_BCMC);
3598 }
3599
3600 static int ehea_mem_notifier(struct notifier_block *nb,
3601 unsigned long action, void *data)
3602 {
3603 int ret = NOTIFY_BAD;
3604 struct memory_notify *arg = data;
3605
3606 mutex_lock(&dlpar_mem_lock);
3607
3608 switch (action) {
3609 case MEM_CANCEL_OFFLINE:
3610 ehea_info("memory offlining canceled");
3611 /* Readd canceled memory block */
3612 case MEM_ONLINE:
3613 ehea_info("memory is going online");
3614 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3615 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3616 goto out_unlock;
3617 ehea_rereg_mrs(NULL);
3618 break;
3619 case MEM_GOING_OFFLINE:
3620 ehea_info("memory is going offline");
3621 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3622 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3623 goto out_unlock;
3624 ehea_rereg_mrs(NULL);
3625 break;
3626 default:
3627 break;
3628 }
3629
3630 ehea_update_firmware_handles();
3631 ret = NOTIFY_OK;
3632
3633 out_unlock:
3634 mutex_unlock(&dlpar_mem_lock);
3635 return ret;
3636 }
3637
3638 static struct notifier_block ehea_mem_nb = {
3639 .notifier_call = ehea_mem_notifier,
3640 };
3641
3642 static int ehea_reboot_notifier(struct notifier_block *nb,
3643 unsigned long action, void *unused)
3644 {
3645 if (action == SYS_RESTART) {
3646 ehea_info("Reboot: freeing all eHEA resources");
3647 ibmebus_unregister_driver(&ehea_driver);
3648 }
3649 return NOTIFY_DONE;
3650 }
3651
3652 static struct notifier_block ehea_reboot_nb = {
3653 .notifier_call = ehea_reboot_notifier,
3654 };
3655
3656 static int check_module_parm(void)
3657 {
3658 int ret = 0;
3659
3660 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3661 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3662 ehea_info("Bad parameter: rq1_entries");
3663 ret = -EINVAL;
3664 }
3665 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3666 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3667 ehea_info("Bad parameter: rq2_entries");
3668 ret = -EINVAL;
3669 }
3670 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3671 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3672 ehea_info("Bad parameter: rq3_entries");
3673 ret = -EINVAL;
3674 }
3675 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3676 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3677 ehea_info("Bad parameter: sq_entries");
3678 ret = -EINVAL;
3679 }
3680
3681 return ret;
3682 }
3683
3684 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3685 char *buf)
3686 {
3687 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3688 }
3689
3690 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3691 ehea_show_capabilities, NULL);
3692
3693 int __init ehea_module_init(void)
3694 {
3695 int ret;
3696
3697 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3698 DRV_VERSION);
3699
3700
3701 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3702 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3703 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3704
3705 mutex_init(&ehea_fw_handles.lock);
3706 spin_lock_init(&ehea_bcmc_regs.lock);
3707
3708 ret = check_module_parm();
3709 if (ret)
3710 goto out;
3711
3712 ret = ehea_create_busmap();
3713 if (ret)
3714 goto out;
3715
3716 ret = register_reboot_notifier(&ehea_reboot_nb);
3717 if (ret)
3718 ehea_info("failed registering reboot notifier");
3719
3720 ret = register_memory_notifier(&ehea_mem_nb);
3721 if (ret)
3722 ehea_info("failed registering memory remove notifier");
3723
3724 ret = crash_shutdown_register(&ehea_crash_handler);
3725 if (ret)
3726 ehea_info("failed registering crash handler");
3727
3728 ret = ibmebus_register_driver(&ehea_driver);
3729 if (ret) {
3730 ehea_error("failed registering eHEA device driver on ebus");
3731 goto out2;
3732 }
3733
3734 ret = driver_create_file(&ehea_driver.driver,
3735 &driver_attr_capabilities);
3736 if (ret) {
3737 ehea_error("failed to register capabilities attribute, ret=%d",
3738 ret);
3739 goto out3;
3740 }
3741
3742 return ret;
3743
3744 out3:
3745 ibmebus_unregister_driver(&ehea_driver);
3746 out2:
3747 unregister_memory_notifier(&ehea_mem_nb);
3748 unregister_reboot_notifier(&ehea_reboot_nb);
3749 crash_shutdown_unregister(&ehea_crash_handler);
3750 out:
3751 return ret;
3752 }
3753
3754 static void __exit ehea_module_exit(void)
3755 {
3756 int ret;
3757
3758 flush_scheduled_work();
3759 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3760 ibmebus_unregister_driver(&ehea_driver);
3761 unregister_reboot_notifier(&ehea_reboot_nb);
3762 ret = crash_shutdown_unregister(&ehea_crash_handler);
3763 if (ret)
3764 ehea_info("failed unregistering crash handler");
3765 unregister_memory_notifier(&ehea_mem_nb);
3766 kfree(ehea_fw_handles.arr);
3767 kfree(ehea_bcmc_regs.arr);
3768 ehea_destroy_busmap();
3769 }
3770
3771 module_init(ehea_module_init);
3772 module_exit(ehea_module_exit);
Linux kernel - Deliverables
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