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net: trans_start cleanups
[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 .name = "ehea",
126 .match_table = ehea_device_table,
127 .probe = ehea_probe_adapter,
128 .remove = ehea_remove,
129 };
130
131 void ehea_dump(void *adr, int len, char *msg)
132 {
133 int x;
134 unsigned char *deb = adr;
135 for (x = 0; x < len; x += 16) {
136 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
137 deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
138 deb += 16;
139 }
140 }
141
142 void ehea_schedule_port_reset(struct ehea_port *port)
143 {
144 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
145 schedule_work(&port->reset_task);
146 }
147
148 static void ehea_update_firmware_handles(void)
149 {
150 struct ehea_fw_handle_entry *arr = NULL;
151 struct ehea_adapter *adapter;
152 int num_adapters = 0;
153 int num_ports = 0;
154 int num_portres = 0;
155 int i = 0;
156 int num_fw_handles, k, l;
157
158 /* Determine number of handles */
159 mutex_lock(&ehea_fw_handles.lock);
160
161 list_for_each_entry(adapter, &adapter_list, list) {
162 num_adapters++;
163
164 for (k = 0; k < EHEA_MAX_PORTS; k++) {
165 struct ehea_port *port = adapter->port[k];
166
167 if (!port || (port->state != EHEA_PORT_UP))
168 continue;
169
170 num_ports++;
171 num_portres += port->num_def_qps + port->num_add_tx_qps;
172 }
173 }
174
175 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
176 num_ports * EHEA_NUM_PORT_FW_HANDLES +
177 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
178
179 if (num_fw_handles) {
180 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
181 if (!arr)
182 goto out; /* Keep the existing array */
183 } else
184 goto out_update;
185
186 list_for_each_entry(adapter, &adapter_list, list) {
187 if (num_adapters == 0)
188 break;
189
190 for (k = 0; k < EHEA_MAX_PORTS; k++) {
191 struct ehea_port *port = adapter->port[k];
192
193 if (!port || (port->state != EHEA_PORT_UP) ||
194 (num_ports == 0))
195 continue;
196
197 for (l = 0;
198 l < port->num_def_qps + port->num_add_tx_qps;
199 l++) {
200 struct ehea_port_res *pr = &port->port_res[l];
201
202 arr[i].adh = adapter->handle;
203 arr[i++].fwh = pr->qp->fw_handle;
204 arr[i].adh = adapter->handle;
205 arr[i++].fwh = pr->send_cq->fw_handle;
206 arr[i].adh = adapter->handle;
207 arr[i++].fwh = pr->recv_cq->fw_handle;
208 arr[i].adh = adapter->handle;
209 arr[i++].fwh = pr->eq->fw_handle;
210 arr[i].adh = adapter->handle;
211 arr[i++].fwh = pr->send_mr.handle;
212 arr[i].adh = adapter->handle;
213 arr[i++].fwh = pr->recv_mr.handle;
214 }
215 arr[i].adh = adapter->handle;
216 arr[i++].fwh = port->qp_eq->fw_handle;
217 num_ports--;
218 }
219
220 arr[i].adh = adapter->handle;
221 arr[i++].fwh = adapter->neq->fw_handle;
222
223 if (adapter->mr.handle) {
224 arr[i].adh = adapter->handle;
225 arr[i++].fwh = adapter->mr.handle;
226 }
227 num_adapters--;
228 }
229
230 out_update:
231 kfree(ehea_fw_handles.arr);
232 ehea_fw_handles.arr = arr;
233 ehea_fw_handles.num_entries = i;
234 out:
235 mutex_unlock(&ehea_fw_handles.lock);
236 }
237
238 static void ehea_update_bcmc_registrations(void)
239 {
240 unsigned long flags;
241 struct ehea_bcmc_reg_entry *arr = NULL;
242 struct ehea_adapter *adapter;
243 struct ehea_mc_list *mc_entry;
244 int num_registrations = 0;
245 int i = 0;
246 int k;
247
248 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
249
250 /* Determine number of registrations */
251 list_for_each_entry(adapter, &adapter_list, list)
252 for (k = 0; k < EHEA_MAX_PORTS; k++) {
253 struct ehea_port *port = adapter->port[k];
254
255 if (!port || (port->state != EHEA_PORT_UP))
256 continue;
257
258 num_registrations += 2; /* Broadcast registrations */
259
260 list_for_each_entry(mc_entry, &port->mc_list->list,list)
261 num_registrations += 2;
262 }
263
264 if (num_registrations) {
265 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
266 if (!arr)
267 goto out; /* Keep the existing array */
268 } else
269 goto out_update;
270
271 list_for_each_entry(adapter, &adapter_list, list) {
272 for (k = 0; k < EHEA_MAX_PORTS; k++) {
273 struct ehea_port *port = adapter->port[k];
274
275 if (!port || (port->state != EHEA_PORT_UP))
276 continue;
277
278 if (num_registrations == 0)
279 goto out_update;
280
281 arr[i].adh = adapter->handle;
282 arr[i].port_id = port->logical_port_id;
283 arr[i].reg_type = EHEA_BCMC_BROADCAST |
284 EHEA_BCMC_UNTAGGED;
285 arr[i++].macaddr = port->mac_addr;
286
287 arr[i].adh = adapter->handle;
288 arr[i].port_id = port->logical_port_id;
289 arr[i].reg_type = EHEA_BCMC_BROADCAST |
290 EHEA_BCMC_VLANID_ALL;
291 arr[i++].macaddr = port->mac_addr;
292 num_registrations -= 2;
293
294 list_for_each_entry(mc_entry,
295 &port->mc_list->list, list) {
296 if (num_registrations == 0)
297 goto out_update;
298
299 arr[i].adh = adapter->handle;
300 arr[i].port_id = port->logical_port_id;
301 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
302 EHEA_BCMC_MULTICAST |
303 EHEA_BCMC_UNTAGGED;
304 arr[i++].macaddr = mc_entry->macaddr;
305
306 arr[i].adh = adapter->handle;
307 arr[i].port_id = port->logical_port_id;
308 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
309 EHEA_BCMC_MULTICAST |
310 EHEA_BCMC_VLANID_ALL;
311 arr[i++].macaddr = mc_entry->macaddr;
312 num_registrations -= 2;
313 }
314 }
315 }
316
317 out_update:
318 kfree(ehea_bcmc_regs.arr);
319 ehea_bcmc_regs.arr = arr;
320 ehea_bcmc_regs.num_entries = i;
321 out:
322 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
323 }
324
325 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
326 {
327 struct ehea_port *port = netdev_priv(dev);
328 struct net_device_stats *stats = &port->stats;
329 struct hcp_ehea_port_cb2 *cb2;
330 u64 hret, rx_packets, tx_packets;
331 int i;
332
333 memset(stats, 0, sizeof(*stats));
334
335 cb2 = (void *)get_zeroed_page(GFP_ATOMIC);
336 if (!cb2) {
337 ehea_error("no mem for cb2");
338 goto out;
339 }
340
341 hret = ehea_h_query_ehea_port(port->adapter->handle,
342 port->logical_port_id,
343 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
344 if (hret != H_SUCCESS) {
345 ehea_error("query_ehea_port failed");
346 goto out_herr;
347 }
348
349 if (netif_msg_hw(port))
350 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
351
352 rx_packets = 0;
353 for (i = 0; i < port->num_def_qps; i++)
354 rx_packets += port->port_res[i].rx_packets;
355
356 tx_packets = 0;
357 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
358 tx_packets += port->port_res[i].tx_packets;
359
360 stats->tx_packets = tx_packets;
361 stats->multicast = cb2->rxmcp;
362 stats->rx_errors = cb2->rxuerr;
363 stats->rx_bytes = cb2->rxo;
364 stats->tx_bytes = cb2->txo;
365 stats->rx_packets = rx_packets;
366
367 out_herr:
368 free_page((unsigned long)cb2);
369 out:
370 return stats;
371 }
372
373 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
374 {
375 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
376 struct net_device *dev = pr->port->netdev;
377 int max_index_mask = pr->rq1_skba.len - 1;
378 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
379 int adder = 0;
380 int i;
381
382 pr->rq1_skba.os_skbs = 0;
383
384 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
385 if (nr_of_wqes > 0)
386 pr->rq1_skba.index = index;
387 pr->rq1_skba.os_skbs = fill_wqes;
388 return;
389 }
390
391 for (i = 0; i < fill_wqes; i++) {
392 if (!skb_arr_rq1[index]) {
393 skb_arr_rq1[index] = netdev_alloc_skb(dev,
394 EHEA_L_PKT_SIZE);
395 if (!skb_arr_rq1[index]) {
396 pr->rq1_skba.os_skbs = fill_wqes - i;
397 break;
398 }
399 }
400 index--;
401 index &= max_index_mask;
402 adder++;
403 }
404
405 if (adder == 0)
406 return;
407
408 /* Ring doorbell */
409 ehea_update_rq1a(pr->qp, adder);
410 }
411
412 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
413 {
414 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
415 struct net_device *dev = pr->port->netdev;
416 int i;
417
418 for (i = 0; i < pr->rq1_skba.len; i++) {
419 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
420 if (!skb_arr_rq1[i])
421 break;
422 }
423 /* Ring doorbell */
424 ehea_update_rq1a(pr->qp, nr_rq1a);
425 }
426
427 static int ehea_refill_rq_def(struct ehea_port_res *pr,
428 struct ehea_q_skb_arr *q_skba, int rq_nr,
429 int num_wqes, int wqe_type, int packet_size)
430 {
431 struct net_device *dev = pr->port->netdev;
432 struct ehea_qp *qp = pr->qp;
433 struct sk_buff **skb_arr = q_skba->arr;
434 struct ehea_rwqe *rwqe;
435 int i, index, max_index_mask, fill_wqes;
436 int adder = 0;
437 int ret = 0;
438
439 fill_wqes = q_skba->os_skbs + num_wqes;
440 q_skba->os_skbs = 0;
441
442 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
443 q_skba->os_skbs = fill_wqes;
444 return ret;
445 }
446
447 index = q_skba->index;
448 max_index_mask = q_skba->len - 1;
449 for (i = 0; i < fill_wqes; i++) {
450 u64 tmp_addr;
451 struct sk_buff *skb;
452
453 skb = netdev_alloc_skb_ip_align(dev, packet_size);
454 if (!skb) {
455 q_skba->os_skbs = fill_wqes - i;
456 if (q_skba->os_skbs == q_skba->len - 2) {
457 ehea_info("%s: rq%i ran dry - no mem for skb",
458 pr->port->netdev->name, rq_nr);
459 ret = -ENOMEM;
460 }
461 break;
462 }
463
464 skb_arr[index] = skb;
465 tmp_addr = ehea_map_vaddr(skb->data);
466 if (tmp_addr == -1) {
467 dev_kfree_skb(skb);
468 q_skba->os_skbs = fill_wqes - i;
469 ret = 0;
470 break;
471 }
472
473 rwqe = ehea_get_next_rwqe(qp, rq_nr);
474 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
475 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
476 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
477 rwqe->sg_list[0].vaddr = tmp_addr;
478 rwqe->sg_list[0].len = packet_size;
479 rwqe->data_segments = 1;
480
481 index++;
482 index &= max_index_mask;
483 adder++;
484 }
485
486 q_skba->index = index;
487 if (adder == 0)
488 goto out;
489
490 /* Ring doorbell */
491 iosync();
492 if (rq_nr == 2)
493 ehea_update_rq2a(pr->qp, adder);
494 else
495 ehea_update_rq3a(pr->qp, adder);
496 out:
497 return ret;
498 }
499
500
501 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
502 {
503 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
504 nr_of_wqes, EHEA_RWQE2_TYPE,
505 EHEA_RQ2_PKT_SIZE);
506 }
507
508
509 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
510 {
511 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
512 nr_of_wqes, EHEA_RWQE3_TYPE,
513 EHEA_MAX_PACKET_SIZE);
514 }
515
516 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
517 {
518 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
519 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
520 return 0;
521 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
522 (cqe->header_length == 0))
523 return 0;
524 return -EINVAL;
525 }
526
527 static inline void ehea_fill_skb(struct net_device *dev,
528 struct sk_buff *skb, struct ehea_cqe *cqe)
529 {
530 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
531
532 skb_put(skb, length);
533 skb->ip_summed = CHECKSUM_UNNECESSARY;
534 skb->protocol = eth_type_trans(skb, dev);
535 }
536
537 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
538 int arr_len,
539 struct ehea_cqe *cqe)
540 {
541 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
542 struct sk_buff *skb;
543 void *pref;
544 int x;
545
546 x = skb_index + 1;
547 x &= (arr_len - 1);
548
549 pref = skb_array[x];
550 if (pref) {
551 prefetchw(pref);
552 prefetchw(pref + EHEA_CACHE_LINE);
553
554 pref = (skb_array[x]->data);
555 prefetch(pref);
556 prefetch(pref + EHEA_CACHE_LINE);
557 prefetch(pref + EHEA_CACHE_LINE * 2);
558 prefetch(pref + EHEA_CACHE_LINE * 3);
559 }
560
561 skb = skb_array[skb_index];
562 skb_array[skb_index] = NULL;
563 return skb;
564 }
565
566 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
567 int arr_len, int wqe_index)
568 {
569 struct sk_buff *skb;
570 void *pref;
571 int x;
572
573 x = wqe_index + 1;
574 x &= (arr_len - 1);
575
576 pref = skb_array[x];
577 if (pref) {
578 prefetchw(pref);
579 prefetchw(pref + EHEA_CACHE_LINE);
580
581 pref = (skb_array[x]->data);
582 prefetchw(pref);
583 prefetchw(pref + EHEA_CACHE_LINE);
584 }
585
586 skb = skb_array[wqe_index];
587 skb_array[wqe_index] = NULL;
588 return skb;
589 }
590
591 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
592 struct ehea_cqe *cqe, int *processed_rq2,
593 int *processed_rq3)
594 {
595 struct sk_buff *skb;
596
597 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
598 pr->p_stats.err_tcp_cksum++;
599 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
600 pr->p_stats.err_ip_cksum++;
601 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
602 pr->p_stats.err_frame_crc++;
603
604 if (rq == 2) {
605 *processed_rq2 += 1;
606 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
607 dev_kfree_skb(skb);
608 } else if (rq == 3) {
609 *processed_rq3 += 1;
610 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
611 dev_kfree_skb(skb);
612 }
613
614 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
615 if (netif_msg_rx_err(pr->port)) {
616 ehea_error("Critical receive error for QP %d. "
617 "Resetting port.", pr->qp->init_attr.qp_nr);
618 ehea_dump(cqe, sizeof(*cqe), "CQE");
619 }
620 ehea_schedule_port_reset(pr->port);
621 return 1;
622 }
623
624 return 0;
625 }
626
627 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
628 void **tcph, u64 *hdr_flags, void *priv)
629 {
630 struct ehea_cqe *cqe = priv;
631 unsigned int ip_len;
632 struct iphdr *iph;
633
634 /* non tcp/udp packets */
635 if (!cqe->header_length)
636 return -1;
637
638 /* non tcp packet */
639 skb_reset_network_header(skb);
640 iph = ip_hdr(skb);
641 if (iph->protocol != IPPROTO_TCP)
642 return -1;
643
644 ip_len = ip_hdrlen(skb);
645 skb_set_transport_header(skb, ip_len);
646 *tcph = tcp_hdr(skb);
647
648 /* check if ip header and tcp header are complete */
649 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
650 return -1;
651
652 *hdr_flags = LRO_IPV4 | LRO_TCP;
653 *iphdr = iph;
654
655 return 0;
656 }
657
658 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
659 struct sk_buff *skb)
660 {
661 int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
662 pr->port->vgrp);
663
664 if (use_lro) {
665 if (vlan_extracted)
666 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
667 pr->port->vgrp,
668 cqe->vlan_tag,
669 cqe);
670 else
671 lro_receive_skb(&pr->lro_mgr, skb, cqe);
672 } else {
673 if (vlan_extracted)
674 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
675 cqe->vlan_tag);
676 else
677 netif_receive_skb(skb);
678 }
679 }
680
681 static int ehea_proc_rwqes(struct net_device *dev,
682 struct ehea_port_res *pr,
683 int budget)
684 {
685 struct ehea_port *port = pr->port;
686 struct ehea_qp *qp = pr->qp;
687 struct ehea_cqe *cqe;
688 struct sk_buff *skb;
689 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
690 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
691 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
692 int skb_arr_rq1_len = pr->rq1_skba.len;
693 int skb_arr_rq2_len = pr->rq2_skba.len;
694 int skb_arr_rq3_len = pr->rq3_skba.len;
695 int processed, processed_rq1, processed_rq2, processed_rq3;
696 int wqe_index, last_wqe_index, rq, port_reset;
697
698 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
699 last_wqe_index = 0;
700
701 cqe = ehea_poll_rq1(qp, &wqe_index);
702 while ((processed < budget) && cqe) {
703 ehea_inc_rq1(qp);
704 processed_rq1++;
705 processed++;
706 if (netif_msg_rx_status(port))
707 ehea_dump(cqe, sizeof(*cqe), "CQE");
708
709 last_wqe_index = wqe_index;
710 rmb();
711 if (!ehea_check_cqe(cqe, &rq)) {
712 if (rq == 1) {
713 /* LL RQ1 */
714 skb = get_skb_by_index_ll(skb_arr_rq1,
715 skb_arr_rq1_len,
716 wqe_index);
717 if (unlikely(!skb)) {
718 if (netif_msg_rx_err(port))
719 ehea_error("LL rq1: skb=NULL");
720
721 skb = netdev_alloc_skb(dev,
722 EHEA_L_PKT_SIZE);
723 if (!skb)
724 break;
725 }
726 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
727 cqe->num_bytes_transfered - 4);
728 ehea_fill_skb(dev, skb, cqe);
729 } else if (rq == 2) {
730 /* RQ2 */
731 skb = get_skb_by_index(skb_arr_rq2,
732 skb_arr_rq2_len, cqe);
733 if (unlikely(!skb)) {
734 if (netif_msg_rx_err(port))
735 ehea_error("rq2: skb=NULL");
736 break;
737 }
738 ehea_fill_skb(dev, skb, cqe);
739 processed_rq2++;
740 } else {
741 /* RQ3 */
742 skb = get_skb_by_index(skb_arr_rq3,
743 skb_arr_rq3_len, cqe);
744 if (unlikely(!skb)) {
745 if (netif_msg_rx_err(port))
746 ehea_error("rq3: skb=NULL");
747 break;
748 }
749 ehea_fill_skb(dev, skb, cqe);
750 processed_rq3++;
751 }
752
753 ehea_proc_skb(pr, cqe, skb);
754 } else {
755 pr->p_stats.poll_receive_errors++;
756 port_reset = ehea_treat_poll_error(pr, rq, cqe,
757 &processed_rq2,
758 &processed_rq3);
759 if (port_reset)
760 break;
761 }
762 cqe = ehea_poll_rq1(qp, &wqe_index);
763 }
764 if (use_lro)
765 lro_flush_all(&pr->lro_mgr);
766
767 pr->rx_packets += processed;
768
769 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
770 ehea_refill_rq2(pr, processed_rq2);
771 ehea_refill_rq3(pr, processed_rq3);
772
773 return processed;
774 }
775
776 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
777 {
778 struct sk_buff *skb;
779 struct ehea_cq *send_cq = pr->send_cq;
780 struct ehea_cqe *cqe;
781 int quota = my_quota;
782 int cqe_counter = 0;
783 int swqe_av = 0;
784 int index;
785 unsigned long flags;
786
787 cqe = ehea_poll_cq(send_cq);
788 while (cqe && (quota > 0)) {
789 ehea_inc_cq(send_cq);
790
791 cqe_counter++;
792 rmb();
793 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
794 ehea_error("Bad send completion status=0x%04X",
795 cqe->status);
796
797 if (netif_msg_tx_err(pr->port))
798 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
799
800 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
801 ehea_error("Resetting port");
802 ehea_schedule_port_reset(pr->port);
803 break;
804 }
805 }
806
807 if (netif_msg_tx_done(pr->port))
808 ehea_dump(cqe, sizeof(*cqe), "CQE");
809
810 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
811 == EHEA_SWQE2_TYPE)) {
812
813 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
814 skb = pr->sq_skba.arr[index];
815 dev_kfree_skb(skb);
816 pr->sq_skba.arr[index] = NULL;
817 }
818
819 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
820 quota--;
821
822 cqe = ehea_poll_cq(send_cq);
823 };
824
825 ehea_update_feca(send_cq, cqe_counter);
826 atomic_add(swqe_av, &pr->swqe_avail);
827
828 spin_lock_irqsave(&pr->netif_queue, flags);
829
830 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
831 >= pr->swqe_refill_th)) {
832 netif_wake_queue(pr->port->netdev);
833 pr->queue_stopped = 0;
834 }
835 spin_unlock_irqrestore(&pr->netif_queue, flags);
836
837 return cqe;
838 }
839
840 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
841 #define EHEA_POLL_MAX_CQES 65535
842
843 static int ehea_poll(struct napi_struct *napi, int budget)
844 {
845 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
846 napi);
847 struct net_device *dev = pr->port->netdev;
848 struct ehea_cqe *cqe;
849 struct ehea_cqe *cqe_skb = NULL;
850 int force_irq, wqe_index;
851 int rx = 0;
852
853 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
854 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
855
856 if (!force_irq)
857 rx += ehea_proc_rwqes(dev, pr, budget - rx);
858
859 while ((rx != budget) || force_irq) {
860 pr->poll_counter = 0;
861 force_irq = 0;
862 napi_complete(napi);
863 ehea_reset_cq_ep(pr->recv_cq);
864 ehea_reset_cq_ep(pr->send_cq);
865 ehea_reset_cq_n1(pr->recv_cq);
866 ehea_reset_cq_n1(pr->send_cq);
867 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
868 cqe_skb = ehea_poll_cq(pr->send_cq);
869
870 if (!cqe && !cqe_skb)
871 return rx;
872
873 if (!napi_reschedule(napi))
874 return rx;
875
876 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
877 rx += ehea_proc_rwqes(dev, pr, budget - rx);
878 }
879
880 pr->poll_counter++;
881 return rx;
882 }
883
884 #ifdef CONFIG_NET_POLL_CONTROLLER
885 static void ehea_netpoll(struct net_device *dev)
886 {
887 struct ehea_port *port = netdev_priv(dev);
888 int i;
889
890 for (i = 0; i < port->num_def_qps; i++)
891 napi_schedule(&port->port_res[i].napi);
892 }
893 #endif
894
895 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
896 {
897 struct ehea_port_res *pr = param;
898
899 napi_schedule(&pr->napi);
900
901 return IRQ_HANDLED;
902 }
903
904 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
905 {
906 struct ehea_port *port = param;
907 struct ehea_eqe *eqe;
908 struct ehea_qp *qp;
909 u32 qp_token;
910 u64 resource_type, aer, aerr;
911 int reset_port = 0;
912
913 eqe = ehea_poll_eq(port->qp_eq);
914
915 while (eqe) {
916 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
917 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
918 eqe->entry, qp_token);
919
920 qp = port->port_res[qp_token].qp;
921
922 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
923 &aer, &aerr);
924
925 if (resource_type == EHEA_AER_RESTYPE_QP) {
926 if ((aer & EHEA_AER_RESET_MASK) ||
927 (aerr & EHEA_AERR_RESET_MASK))
928 reset_port = 1;
929 } else
930 reset_port = 1; /* Reset in case of CQ or EQ error */
931
932 eqe = ehea_poll_eq(port->qp_eq);
933 }
934
935 if (reset_port) {
936 ehea_error("Resetting port");
937 ehea_schedule_port_reset(port);
938 }
939
940 return IRQ_HANDLED;
941 }
942
943 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
944 int logical_port)
945 {
946 int i;
947
948 for (i = 0; i < EHEA_MAX_PORTS; i++)
949 if (adapter->port[i])
950 if (adapter->port[i]->logical_port_id == logical_port)
951 return adapter->port[i];
952 return NULL;
953 }
954
955 int ehea_sense_port_attr(struct ehea_port *port)
956 {
957 int ret;
958 u64 hret;
959 struct hcp_ehea_port_cb0 *cb0;
960
961 /* may be called via ehea_neq_tasklet() */
962 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
963 if (!cb0) {
964 ehea_error("no mem for cb0");
965 ret = -ENOMEM;
966 goto out;
967 }
968
969 hret = ehea_h_query_ehea_port(port->adapter->handle,
970 port->logical_port_id, H_PORT_CB0,
971 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
972 cb0);
973 if (hret != H_SUCCESS) {
974 ret = -EIO;
975 goto out_free;
976 }
977
978 /* MAC address */
979 port->mac_addr = cb0->port_mac_addr << 16;
980
981 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
982 ret = -EADDRNOTAVAIL;
983 goto out_free;
984 }
985
986 /* Port speed */
987 switch (cb0->port_speed) {
988 case H_SPEED_10M_H:
989 port->port_speed = EHEA_SPEED_10M;
990 port->full_duplex = 0;
991 break;
992 case H_SPEED_10M_F:
993 port->port_speed = EHEA_SPEED_10M;
994 port->full_duplex = 1;
995 break;
996 case H_SPEED_100M_H:
997 port->port_speed = EHEA_SPEED_100M;
998 port->full_duplex = 0;
999 break;
1000 case H_SPEED_100M_F:
1001 port->port_speed = EHEA_SPEED_100M;
1002 port->full_duplex = 1;
1003 break;
1004 case H_SPEED_1G_F:
1005 port->port_speed = EHEA_SPEED_1G;
1006 port->full_duplex = 1;
1007 break;
1008 case H_SPEED_10G_F:
1009 port->port_speed = EHEA_SPEED_10G;
1010 port->full_duplex = 1;
1011 break;
1012 default:
1013 port->port_speed = 0;
1014 port->full_duplex = 0;
1015 break;
1016 }
1017
1018 port->autoneg = 1;
1019 port->num_mcs = cb0->num_default_qps;
1020
1021 /* Number of default QPs */
1022 if (use_mcs)
1023 port->num_def_qps = cb0->num_default_qps;
1024 else
1025 port->num_def_qps = 1;
1026
1027 if (!port->num_def_qps) {
1028 ret = -EINVAL;
1029 goto out_free;
1030 }
1031
1032 port->num_tx_qps = num_tx_qps;
1033
1034 if (port->num_def_qps >= port->num_tx_qps)
1035 port->num_add_tx_qps = 0;
1036 else
1037 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1038
1039 ret = 0;
1040 out_free:
1041 if (ret || netif_msg_probe(port))
1042 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1043 free_page((unsigned long)cb0);
1044 out:
1045 return ret;
1046 }
1047
1048 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1049 {
1050 struct hcp_ehea_port_cb4 *cb4;
1051 u64 hret;
1052 int ret = 0;
1053
1054 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1055 if (!cb4) {
1056 ehea_error("no mem for cb4");
1057 ret = -ENOMEM;
1058 goto out;
1059 }
1060
1061 cb4->port_speed = port_speed;
1062
1063 netif_carrier_off(port->netdev);
1064
1065 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1066 port->logical_port_id,
1067 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1068 if (hret == H_SUCCESS) {
1069 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1070
1071 hret = ehea_h_query_ehea_port(port->adapter->handle,
1072 port->logical_port_id,
1073 H_PORT_CB4, H_PORT_CB4_SPEED,
1074 cb4);
1075 if (hret == H_SUCCESS) {
1076 switch (cb4->port_speed) {
1077 case H_SPEED_10M_H:
1078 port->port_speed = EHEA_SPEED_10M;
1079 port->full_duplex = 0;
1080 break;
1081 case H_SPEED_10M_F:
1082 port->port_speed = EHEA_SPEED_10M;
1083 port->full_duplex = 1;
1084 break;
1085 case H_SPEED_100M_H:
1086 port->port_speed = EHEA_SPEED_100M;
1087 port->full_duplex = 0;
1088 break;
1089 case H_SPEED_100M_F:
1090 port->port_speed = EHEA_SPEED_100M;
1091 port->full_duplex = 1;
1092 break;
1093 case H_SPEED_1G_F:
1094 port->port_speed = EHEA_SPEED_1G;
1095 port->full_duplex = 1;
1096 break;
1097 case H_SPEED_10G_F:
1098 port->port_speed = EHEA_SPEED_10G;
1099 port->full_duplex = 1;
1100 break;
1101 default:
1102 port->port_speed = 0;
1103 port->full_duplex = 0;
1104 break;
1105 }
1106 } else {
1107 ehea_error("Failed sensing port speed");
1108 ret = -EIO;
1109 }
1110 } else {
1111 if (hret == H_AUTHORITY) {
1112 ehea_info("Hypervisor denied setting port speed");
1113 ret = -EPERM;
1114 } else {
1115 ret = -EIO;
1116 ehea_error("Failed setting port speed");
1117 }
1118 }
1119 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1120 netif_carrier_on(port->netdev);
1121
1122 free_page((unsigned long)cb4);
1123 out:
1124 return ret;
1125 }
1126
1127 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1128 {
1129 int ret;
1130 u8 ec;
1131 u8 portnum;
1132 struct ehea_port *port;
1133
1134 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1135 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1136 port = ehea_get_port(adapter, portnum);
1137
1138 switch (ec) {
1139 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1140
1141 if (!port) {
1142 ehea_error("unknown portnum %x", portnum);
1143 break;
1144 }
1145
1146 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1147 if (!netif_carrier_ok(port->netdev)) {
1148 ret = ehea_sense_port_attr(port);
1149 if (ret) {
1150 ehea_error("failed resensing port "
1151 "attributes");
1152 break;
1153 }
1154
1155 if (netif_msg_link(port))
1156 ehea_info("%s: Logical port up: %dMbps "
1157 "%s Duplex",
1158 port->netdev->name,
1159 port->port_speed,
1160 port->full_duplex ==
1161 1 ? "Full" : "Half");
1162
1163 netif_carrier_on(port->netdev);
1164 netif_wake_queue(port->netdev);
1165 }
1166 } else
1167 if (netif_carrier_ok(port->netdev)) {
1168 if (netif_msg_link(port))
1169 ehea_info("%s: Logical port down",
1170 port->netdev->name);
1171 netif_carrier_off(port->netdev);
1172 netif_stop_queue(port->netdev);
1173 }
1174
1175 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1176 port->phy_link = EHEA_PHY_LINK_UP;
1177 if (netif_msg_link(port))
1178 ehea_info("%s: Physical port up",
1179 port->netdev->name);
1180 if (prop_carrier_state)
1181 netif_carrier_on(port->netdev);
1182 } else {
1183 port->phy_link = EHEA_PHY_LINK_DOWN;
1184 if (netif_msg_link(port))
1185 ehea_info("%s: Physical port down",
1186 port->netdev->name);
1187 if (prop_carrier_state)
1188 netif_carrier_off(port->netdev);
1189 }
1190
1191 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1192 ehea_info("External switch port is primary port");
1193 else
1194 ehea_info("External switch port is backup port");
1195
1196 break;
1197 case EHEA_EC_ADAPTER_MALFUNC:
1198 ehea_error("Adapter malfunction");
1199 break;
1200 case EHEA_EC_PORT_MALFUNC:
1201 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1202 netif_carrier_off(port->netdev);
1203 netif_stop_queue(port->netdev);
1204 break;
1205 default:
1206 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1207 break;
1208 }
1209 }
1210
1211 static void ehea_neq_tasklet(unsigned long data)
1212 {
1213 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1214 struct ehea_eqe *eqe;
1215 u64 event_mask;
1216
1217 eqe = ehea_poll_eq(adapter->neq);
1218 ehea_debug("eqe=%p", eqe);
1219
1220 while (eqe) {
1221 ehea_debug("*eqe=%lx", eqe->entry);
1222 ehea_parse_eqe(adapter, eqe->entry);
1223 eqe = ehea_poll_eq(adapter->neq);
1224 ehea_debug("next eqe=%p", eqe);
1225 }
1226
1227 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1228 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1229 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1230
1231 ehea_h_reset_events(adapter->handle,
1232 adapter->neq->fw_handle, event_mask);
1233 }
1234
1235 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1236 {
1237 struct ehea_adapter *adapter = param;
1238 tasklet_hi_schedule(&adapter->neq_tasklet);
1239 return IRQ_HANDLED;
1240 }
1241
1242
1243 static int ehea_fill_port_res(struct ehea_port_res *pr)
1244 {
1245 int ret;
1246 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1247
1248 ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1249 - init_attr->act_nr_rwqes_rq2
1250 - init_attr->act_nr_rwqes_rq3 - 1);
1251
1252 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1253
1254 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1255
1256 return ret;
1257 }
1258
1259 static int ehea_reg_interrupts(struct net_device *dev)
1260 {
1261 struct ehea_port *port = netdev_priv(dev);
1262 struct ehea_port_res *pr;
1263 int i, ret;
1264
1265
1266 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1267 dev->name);
1268
1269 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1270 ehea_qp_aff_irq_handler,
1271 IRQF_DISABLED, port->int_aff_name, port);
1272 if (ret) {
1273 ehea_error("failed registering irq for qp_aff_irq_handler:"
1274 "ist=%X", port->qp_eq->attr.ist1);
1275 goto out_free_qpeq;
1276 }
1277
1278 if (netif_msg_ifup(port))
1279 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1280 "registered", port->qp_eq->attr.ist1);
1281
1282
1283 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1284 pr = &port->port_res[i];
1285 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1286 "%s-queue%d", dev->name, i);
1287 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1288 ehea_recv_irq_handler,
1289 IRQF_DISABLED, pr->int_send_name,
1290 pr);
1291 if (ret) {
1292 ehea_error("failed registering irq for ehea_queue "
1293 "port_res_nr:%d, ist=%X", i,
1294 pr->eq->attr.ist1);
1295 goto out_free_req;
1296 }
1297 if (netif_msg_ifup(port))
1298 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1299 "%d registered", pr->eq->attr.ist1, i);
1300 }
1301 out:
1302 return ret;
1303
1304
1305 out_free_req:
1306 while (--i >= 0) {
1307 u32 ist = port->port_res[i].eq->attr.ist1;
1308 ibmebus_free_irq(ist, &port->port_res[i]);
1309 }
1310
1311 out_free_qpeq:
1312 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1313 i = port->num_def_qps;
1314
1315 goto out;
1316
1317 }
1318
1319 static void ehea_free_interrupts(struct net_device *dev)
1320 {
1321 struct ehea_port *port = netdev_priv(dev);
1322 struct ehea_port_res *pr;
1323 int i;
1324
1325 /* send */
1326
1327 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1328 pr = &port->port_res[i];
1329 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1330 if (netif_msg_intr(port))
1331 ehea_info("free send irq for res %d with handle 0x%X",
1332 i, pr->eq->attr.ist1);
1333 }
1334
1335 /* associated events */
1336 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1337 if (netif_msg_intr(port))
1338 ehea_info("associated event interrupt for handle 0x%X freed",
1339 port->qp_eq->attr.ist1);
1340 }
1341
1342 static int ehea_configure_port(struct ehea_port *port)
1343 {
1344 int ret, i;
1345 u64 hret, mask;
1346 struct hcp_ehea_port_cb0 *cb0;
1347
1348 ret = -ENOMEM;
1349 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1350 if (!cb0)
1351 goto out;
1352
1353 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1354 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1355 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1356 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1357 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1358 PXLY_RC_VLAN_FILTER)
1359 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1360
1361 for (i = 0; i < port->num_mcs; i++)
1362 if (use_mcs)
1363 cb0->default_qpn_arr[i] =
1364 port->port_res[i].qp->init_attr.qp_nr;
1365 else
1366 cb0->default_qpn_arr[i] =
1367 port->port_res[0].qp->init_attr.qp_nr;
1368
1369 if (netif_msg_ifup(port))
1370 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1371
1372 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1373 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1374
1375 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1376 port->logical_port_id,
1377 H_PORT_CB0, mask, cb0);
1378 ret = -EIO;
1379 if (hret != H_SUCCESS)
1380 goto out_free;
1381
1382 ret = 0;
1383
1384 out_free:
1385 free_page((unsigned long)cb0);
1386 out:
1387 return ret;
1388 }
1389
1390 int ehea_gen_smrs(struct ehea_port_res *pr)
1391 {
1392 int ret;
1393 struct ehea_adapter *adapter = pr->port->adapter;
1394
1395 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1396 if (ret)
1397 goto out;
1398
1399 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1400 if (ret)
1401 goto out_free;
1402
1403 return 0;
1404
1405 out_free:
1406 ehea_rem_mr(&pr->send_mr);
1407 out:
1408 ehea_error("Generating SMRS failed\n");
1409 return -EIO;
1410 }
1411
1412 int ehea_rem_smrs(struct ehea_port_res *pr)
1413 {
1414 if ((ehea_rem_mr(&pr->send_mr)) ||
1415 (ehea_rem_mr(&pr->recv_mr)))
1416 return -EIO;
1417 else
1418 return 0;
1419 }
1420
1421 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1422 {
1423 int arr_size = sizeof(void *) * max_q_entries;
1424
1425 q_skba->arr = vmalloc(arr_size);
1426 if (!q_skba->arr)
1427 return -ENOMEM;
1428
1429 memset(q_skba->arr, 0, arr_size);
1430
1431 q_skba->len = max_q_entries;
1432 q_skba->index = 0;
1433 q_skba->os_skbs = 0;
1434
1435 return 0;
1436 }
1437
1438 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1439 struct port_res_cfg *pr_cfg, int queue_token)
1440 {
1441 struct ehea_adapter *adapter = port->adapter;
1442 enum ehea_eq_type eq_type = EHEA_EQ;
1443 struct ehea_qp_init_attr *init_attr = NULL;
1444 int ret = -EIO;
1445
1446 memset(pr, 0, sizeof(struct ehea_port_res));
1447
1448 pr->port = port;
1449 spin_lock_init(&pr->xmit_lock);
1450 spin_lock_init(&pr->netif_queue);
1451
1452 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1453 if (!pr->eq) {
1454 ehea_error("create_eq failed (eq)");
1455 goto out_free;
1456 }
1457
1458 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1459 pr->eq->fw_handle,
1460 port->logical_port_id);
1461 if (!pr->recv_cq) {
1462 ehea_error("create_cq failed (cq_recv)");
1463 goto out_free;
1464 }
1465
1466 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1467 pr->eq->fw_handle,
1468 port->logical_port_id);
1469 if (!pr->send_cq) {
1470 ehea_error("create_cq failed (cq_send)");
1471 goto out_free;
1472 }
1473
1474 if (netif_msg_ifup(port))
1475 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1476 pr->send_cq->attr.act_nr_of_cqes,
1477 pr->recv_cq->attr.act_nr_of_cqes);
1478
1479 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1480 if (!init_attr) {
1481 ret = -ENOMEM;
1482 ehea_error("no mem for ehea_qp_init_attr");
1483 goto out_free;
1484 }
1485
1486 init_attr->low_lat_rq1 = 1;
1487 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1488 init_attr->rq_count = 3;
1489 init_attr->qp_token = queue_token;
1490 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1491 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1492 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1493 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1494 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1495 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1496 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1497 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1498 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1499 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1500 init_attr->port_nr = port->logical_port_id;
1501 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1502 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1503 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1504
1505 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1506 if (!pr->qp) {
1507 ehea_error("create_qp failed");
1508 ret = -EIO;
1509 goto out_free;
1510 }
1511
1512 if (netif_msg_ifup(port))
1513 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1514 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1515 init_attr->act_nr_send_wqes,
1516 init_attr->act_nr_rwqes_rq1,
1517 init_attr->act_nr_rwqes_rq2,
1518 init_attr->act_nr_rwqes_rq3);
1519
1520 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1521
1522 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1523 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1524 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1525 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1526 if (ret)
1527 goto out_free;
1528
1529 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1530 if (ehea_gen_smrs(pr) != 0) {
1531 ret = -EIO;
1532 goto out_free;
1533 }
1534
1535 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1536
1537 kfree(init_attr);
1538
1539 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1540
1541 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1542 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1543 pr->lro_mgr.lro_arr = pr->lro_desc;
1544 pr->lro_mgr.get_skb_header = get_skb_hdr;
1545 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1546 pr->lro_mgr.dev = port->netdev;
1547 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1548 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1549
1550 ret = 0;
1551 goto out;
1552
1553 out_free:
1554 kfree(init_attr);
1555 vfree(pr->sq_skba.arr);
1556 vfree(pr->rq1_skba.arr);
1557 vfree(pr->rq2_skba.arr);
1558 vfree(pr->rq3_skba.arr);
1559 ehea_destroy_qp(pr->qp);
1560 ehea_destroy_cq(pr->send_cq);
1561 ehea_destroy_cq(pr->recv_cq);
1562 ehea_destroy_eq(pr->eq);
1563 out:
1564 return ret;
1565 }
1566
1567 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1568 {
1569 int ret, i;
1570
1571 if (pr->qp)
1572 netif_napi_del(&pr->napi);
1573
1574 ret = ehea_destroy_qp(pr->qp);
1575
1576 if (!ret) {
1577 ehea_destroy_cq(pr->send_cq);
1578 ehea_destroy_cq(pr->recv_cq);
1579 ehea_destroy_eq(pr->eq);
1580
1581 for (i = 0; i < pr->rq1_skba.len; i++)
1582 if (pr->rq1_skba.arr[i])
1583 dev_kfree_skb(pr->rq1_skba.arr[i]);
1584
1585 for (i = 0; i < pr->rq2_skba.len; i++)
1586 if (pr->rq2_skba.arr[i])
1587 dev_kfree_skb(pr->rq2_skba.arr[i]);
1588
1589 for (i = 0; i < pr->rq3_skba.len; i++)
1590 if (pr->rq3_skba.arr[i])
1591 dev_kfree_skb(pr->rq3_skba.arr[i]);
1592
1593 for (i = 0; i < pr->sq_skba.len; i++)
1594 if (pr->sq_skba.arr[i])
1595 dev_kfree_skb(pr->sq_skba.arr[i]);
1596
1597 vfree(pr->rq1_skba.arr);
1598 vfree(pr->rq2_skba.arr);
1599 vfree(pr->rq3_skba.arr);
1600 vfree(pr->sq_skba.arr);
1601 ret = ehea_rem_smrs(pr);
1602 }
1603 return ret;
1604 }
1605
1606 /*
1607 * The write_* functions store information in swqe which is used by
1608 * the hardware to calculate the ip/tcp/udp checksum
1609 */
1610
1611 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1612 const struct sk_buff *skb)
1613 {
1614 swqe->ip_start = skb_network_offset(skb);
1615 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1616 }
1617
1618 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1619 const struct sk_buff *skb)
1620 {
1621 swqe->tcp_offset =
1622 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1623
1624 swqe->tcp_end = (u16)skb->len - 1;
1625 }
1626
1627 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1628 const struct sk_buff *skb)
1629 {
1630 swqe->tcp_offset =
1631 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1632
1633 swqe->tcp_end = (u16)skb->len - 1;
1634 }
1635
1636
1637 static void write_swqe2_TSO(struct sk_buff *skb,
1638 struct ehea_swqe *swqe, u32 lkey)
1639 {
1640 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1641 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1642 int skb_data_size = skb_headlen(skb);
1643 int headersize;
1644
1645 /* Packet is TCP with TSO enabled */
1646 swqe->tx_control |= EHEA_SWQE_TSO;
1647 swqe->mss = skb_shinfo(skb)->gso_size;
1648 /* copy only eth/ip/tcp headers to immediate data and
1649 * the rest of skb->data to sg1entry
1650 */
1651 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1652
1653 skb_data_size = skb_headlen(skb);
1654
1655 if (skb_data_size >= headersize) {
1656 /* copy immediate data */
1657 skb_copy_from_linear_data(skb, imm_data, headersize);
1658 swqe->immediate_data_length = headersize;
1659
1660 if (skb_data_size > headersize) {
1661 /* set sg1entry data */
1662 sg1entry->l_key = lkey;
1663 sg1entry->len = skb_data_size - headersize;
1664 sg1entry->vaddr =
1665 ehea_map_vaddr(skb->data + headersize);
1666 swqe->descriptors++;
1667 }
1668 } else
1669 ehea_error("cannot handle fragmented headers");
1670 }
1671
1672 static void write_swqe2_nonTSO(struct sk_buff *skb,
1673 struct ehea_swqe *swqe, u32 lkey)
1674 {
1675 int skb_data_size = skb_headlen(skb);
1676 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1677 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1678
1679 /* Packet is any nonTSO type
1680 *
1681 * Copy as much as possible skb->data to immediate data and
1682 * the rest to sg1entry
1683 */
1684 if (skb_data_size >= SWQE2_MAX_IMM) {
1685 /* copy immediate data */
1686 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1687
1688 swqe->immediate_data_length = SWQE2_MAX_IMM;
1689
1690 if (skb_data_size > SWQE2_MAX_IMM) {
1691 /* copy sg1entry data */
1692 sg1entry->l_key = lkey;
1693 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1694 sg1entry->vaddr =
1695 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1696 swqe->descriptors++;
1697 }
1698 } else {
1699 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1700 swqe->immediate_data_length = skb_data_size;
1701 }
1702 }
1703
1704 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1705 struct ehea_swqe *swqe, u32 lkey)
1706 {
1707 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1708 skb_frag_t *frag;
1709 int nfrags, sg1entry_contains_frag_data, i;
1710
1711 nfrags = skb_shinfo(skb)->nr_frags;
1712 sg1entry = &swqe->u.immdata_desc.sg_entry;
1713 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1714 swqe->descriptors = 0;
1715 sg1entry_contains_frag_data = 0;
1716
1717 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1718 write_swqe2_TSO(skb, swqe, lkey);
1719 else
1720 write_swqe2_nonTSO(skb, swqe, lkey);
1721
1722 /* write descriptors */
1723 if (nfrags > 0) {
1724 if (swqe->descriptors == 0) {
1725 /* sg1entry not yet used */
1726 frag = &skb_shinfo(skb)->frags[0];
1727
1728 /* copy sg1entry data */
1729 sg1entry->l_key = lkey;
1730 sg1entry->len = frag->size;
1731 sg1entry->vaddr =
1732 ehea_map_vaddr(page_address(frag->page)
1733 + frag->page_offset);
1734 swqe->descriptors++;
1735 sg1entry_contains_frag_data = 1;
1736 }
1737
1738 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1739
1740 frag = &skb_shinfo(skb)->frags[i];
1741 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1742
1743 sgentry->l_key = lkey;
1744 sgentry->len = frag->size;
1745 sgentry->vaddr =
1746 ehea_map_vaddr(page_address(frag->page)
1747 + frag->page_offset);
1748 swqe->descriptors++;
1749 }
1750 }
1751 }
1752
1753 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1754 {
1755 int ret = 0;
1756 u64 hret;
1757 u8 reg_type;
1758
1759 /* De/Register untagged packets */
1760 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1761 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1762 port->logical_port_id,
1763 reg_type, port->mac_addr, 0, hcallid);
1764 if (hret != H_SUCCESS) {
1765 ehea_error("%sregistering bc address failed (tagged)",
1766 hcallid == H_REG_BCMC ? "" : "de");
1767 ret = -EIO;
1768 goto out_herr;
1769 }
1770
1771 /* De/Register VLAN packets */
1772 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1773 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1774 port->logical_port_id,
1775 reg_type, port->mac_addr, 0, hcallid);
1776 if (hret != H_SUCCESS) {
1777 ehea_error("%sregistering bc address failed (vlan)",
1778 hcallid == H_REG_BCMC ? "" : "de");
1779 ret = -EIO;
1780 }
1781 out_herr:
1782 return ret;
1783 }
1784
1785 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1786 {
1787 struct ehea_port *port = netdev_priv(dev);
1788 struct sockaddr *mac_addr = sa;
1789 struct hcp_ehea_port_cb0 *cb0;
1790 int ret;
1791 u64 hret;
1792
1793 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1794 ret = -EADDRNOTAVAIL;
1795 goto out;
1796 }
1797
1798 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1799 if (!cb0) {
1800 ehea_error("no mem for cb0");
1801 ret = -ENOMEM;
1802 goto out;
1803 }
1804
1805 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1806
1807 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1808
1809 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1810 port->logical_port_id, H_PORT_CB0,
1811 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1812 if (hret != H_SUCCESS) {
1813 ret = -EIO;
1814 goto out_free;
1815 }
1816
1817 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1818
1819 /* Deregister old MAC in pHYP */
1820 if (port->state == EHEA_PORT_UP) {
1821 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1822 if (ret)
1823 goto out_upregs;
1824 }
1825
1826 port->mac_addr = cb0->port_mac_addr << 16;
1827
1828 /* Register new MAC in pHYP */
1829 if (port->state == EHEA_PORT_UP) {
1830 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1831 if (ret)
1832 goto out_upregs;
1833 }
1834
1835 ret = 0;
1836
1837 out_upregs:
1838 ehea_update_bcmc_registrations();
1839 out_free:
1840 free_page((unsigned long)cb0);
1841 out:
1842 return ret;
1843 }
1844
1845 static void ehea_promiscuous_error(u64 hret, int enable)
1846 {
1847 if (hret == H_AUTHORITY)
1848 ehea_info("Hypervisor denied %sabling promiscuous mode",
1849 enable == 1 ? "en" : "dis");
1850 else
1851 ehea_error("failed %sabling promiscuous mode",
1852 enable == 1 ? "en" : "dis");
1853 }
1854
1855 static void ehea_promiscuous(struct net_device *dev, int enable)
1856 {
1857 struct ehea_port *port = netdev_priv(dev);
1858 struct hcp_ehea_port_cb7 *cb7;
1859 u64 hret;
1860
1861 if ((enable && port->promisc) || (!enable && !port->promisc))
1862 return;
1863
1864 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1865 if (!cb7) {
1866 ehea_error("no mem for cb7");
1867 goto out;
1868 }
1869
1870 /* Modify Pxs_DUCQPN in CB7 */
1871 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1872
1873 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1874 port->logical_port_id,
1875 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1876 if (hret) {
1877 ehea_promiscuous_error(hret, enable);
1878 goto out;
1879 }
1880
1881 port->promisc = enable;
1882 out:
1883 free_page((unsigned long)cb7);
1884 return;
1885 }
1886
1887 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1888 u32 hcallid)
1889 {
1890 u64 hret;
1891 u8 reg_type;
1892
1893 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1894 | EHEA_BCMC_UNTAGGED;
1895
1896 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1897 port->logical_port_id,
1898 reg_type, mc_mac_addr, 0, hcallid);
1899 if (hret)
1900 goto out;
1901
1902 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1903 | EHEA_BCMC_VLANID_ALL;
1904
1905 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1906 port->logical_port_id,
1907 reg_type, mc_mac_addr, 0, hcallid);
1908 out:
1909 return hret;
1910 }
1911
1912 static int ehea_drop_multicast_list(struct net_device *dev)
1913 {
1914 struct ehea_port *port = netdev_priv(dev);
1915 struct ehea_mc_list *mc_entry = port->mc_list;
1916 struct list_head *pos;
1917 struct list_head *temp;
1918 int ret = 0;
1919 u64 hret;
1920
1921 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1922 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1923
1924 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1925 H_DEREG_BCMC);
1926 if (hret) {
1927 ehea_error("failed deregistering mcast MAC");
1928 ret = -EIO;
1929 }
1930
1931 list_del(pos);
1932 kfree(mc_entry);
1933 }
1934 return ret;
1935 }
1936
1937 static void ehea_allmulti(struct net_device *dev, int enable)
1938 {
1939 struct ehea_port *port = netdev_priv(dev);
1940 u64 hret;
1941
1942 if (!port->allmulti) {
1943 if (enable) {
1944 /* Enable ALLMULTI */
1945 ehea_drop_multicast_list(dev);
1946 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1947 if (!hret)
1948 port->allmulti = 1;
1949 else
1950 ehea_error("failed enabling IFF_ALLMULTI");
1951 }
1952 } else
1953 if (!enable) {
1954 /* Disable ALLMULTI */
1955 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1956 if (!hret)
1957 port->allmulti = 0;
1958 else
1959 ehea_error("failed disabling IFF_ALLMULTI");
1960 }
1961 }
1962
1963 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1964 {
1965 struct ehea_mc_list *ehea_mcl_entry;
1966 u64 hret;
1967
1968 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1969 if (!ehea_mcl_entry) {
1970 ehea_error("no mem for mcl_entry");
1971 return;
1972 }
1973
1974 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1975
1976 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1977
1978 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1979 H_REG_BCMC);
1980 if (!hret)
1981 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1982 else {
1983 ehea_error("failed registering mcast MAC");
1984 kfree(ehea_mcl_entry);
1985 }
1986 }
1987
1988 static void ehea_set_multicast_list(struct net_device *dev)
1989 {
1990 struct ehea_port *port = netdev_priv(dev);
1991 struct netdev_hw_addr *ha;
1992 int ret;
1993
1994 if (dev->flags & IFF_PROMISC) {
1995 ehea_promiscuous(dev, 1);
1996 return;
1997 }
1998 ehea_promiscuous(dev, 0);
1999
2000 if (dev->flags & IFF_ALLMULTI) {
2001 ehea_allmulti(dev, 1);
2002 goto out;
2003 }
2004 ehea_allmulti(dev, 0);
2005
2006 if (!netdev_mc_empty(dev)) {
2007 ret = ehea_drop_multicast_list(dev);
2008 if (ret) {
2009 /* Dropping the current multicast list failed.
2010 * Enabling ALL_MULTI is the best we can do.
2011 */
2012 ehea_allmulti(dev, 1);
2013 }
2014
2015 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2016 ehea_info("Mcast registration limit reached (0x%llx). "
2017 "Use ALLMULTI!",
2018 port->adapter->max_mc_mac);
2019 goto out;
2020 }
2021
2022 netdev_for_each_mc_addr(ha, dev)
2023 ehea_add_multicast_entry(port, ha->addr);
2024
2025 }
2026 out:
2027 ehea_update_bcmc_registrations();
2028 return;
2029 }
2030
2031 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2032 {
2033 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2034 return -EINVAL;
2035 dev->mtu = new_mtu;
2036 return 0;
2037 }
2038
2039 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2040 struct ehea_swqe *swqe, u32 lkey)
2041 {
2042 if (skb->protocol == htons(ETH_P_IP)) {
2043 const struct iphdr *iph = ip_hdr(skb);
2044
2045 /* IPv4 */
2046 swqe->tx_control |= EHEA_SWQE_CRC
2047 | EHEA_SWQE_IP_CHECKSUM
2048 | EHEA_SWQE_TCP_CHECKSUM
2049 | EHEA_SWQE_IMM_DATA_PRESENT
2050 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2051
2052 write_ip_start_end(swqe, skb);
2053
2054 if (iph->protocol == IPPROTO_UDP) {
2055 if ((iph->frag_off & IP_MF) ||
2056 (iph->frag_off & IP_OFFSET))
2057 /* IP fragment, so don't change cs */
2058 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2059 else
2060 write_udp_offset_end(swqe, skb);
2061 } else if (iph->protocol == IPPROTO_TCP) {
2062 write_tcp_offset_end(swqe, skb);
2063 }
2064
2065 /* icmp (big data) and ip segmentation packets (all other ip
2066 packets) do not require any special handling */
2067
2068 } else {
2069 /* Other Ethernet Protocol */
2070 swqe->tx_control |= EHEA_SWQE_CRC
2071 | EHEA_SWQE_IMM_DATA_PRESENT
2072 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2073 }
2074
2075 write_swqe2_data(skb, dev, swqe, lkey);
2076 }
2077
2078 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2079 struct ehea_swqe *swqe)
2080 {
2081 int nfrags = skb_shinfo(skb)->nr_frags;
2082 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2083 skb_frag_t *frag;
2084 int i;
2085
2086 if (skb->protocol == htons(ETH_P_IP)) {
2087 const struct iphdr *iph = ip_hdr(skb);
2088
2089 /* IPv4 */
2090 write_ip_start_end(swqe, skb);
2091
2092 if (iph->protocol == IPPROTO_TCP) {
2093 swqe->tx_control |= EHEA_SWQE_CRC
2094 | EHEA_SWQE_IP_CHECKSUM
2095 | EHEA_SWQE_TCP_CHECKSUM
2096 | EHEA_SWQE_IMM_DATA_PRESENT;
2097
2098 write_tcp_offset_end(swqe, skb);
2099
2100 } else if (iph->protocol == IPPROTO_UDP) {
2101 if ((iph->frag_off & IP_MF) ||
2102 (iph->frag_off & IP_OFFSET))
2103 /* IP fragment, so don't change cs */
2104 swqe->tx_control |= EHEA_SWQE_CRC
2105 | EHEA_SWQE_IMM_DATA_PRESENT;
2106 else {
2107 swqe->tx_control |= EHEA_SWQE_CRC
2108 | EHEA_SWQE_IP_CHECKSUM
2109 | EHEA_SWQE_TCP_CHECKSUM
2110 | EHEA_SWQE_IMM_DATA_PRESENT;
2111
2112 write_udp_offset_end(swqe, skb);
2113 }
2114 } else {
2115 /* icmp (big data) and
2116 ip segmentation packets (all other ip packets) */
2117 swqe->tx_control |= EHEA_SWQE_CRC
2118 | EHEA_SWQE_IP_CHECKSUM
2119 | EHEA_SWQE_IMM_DATA_PRESENT;
2120 }
2121 } else {
2122 /* Other Ethernet Protocol */
2123 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2124 }
2125 /* copy (immediate) data */
2126 if (nfrags == 0) {
2127 /* data is in a single piece */
2128 skb_copy_from_linear_data(skb, imm_data, skb->len);
2129 } else {
2130 /* first copy data from the skb->data buffer ... */
2131 skb_copy_from_linear_data(skb, imm_data,
2132 skb_headlen(skb));
2133 imm_data += skb_headlen(skb);
2134
2135 /* ... then copy data from the fragments */
2136 for (i = 0; i < nfrags; i++) {
2137 frag = &skb_shinfo(skb)->frags[i];
2138 memcpy(imm_data,
2139 page_address(frag->page) + frag->page_offset,
2140 frag->size);
2141 imm_data += frag->size;
2142 }
2143 }
2144 swqe->immediate_data_length = skb->len;
2145 dev_kfree_skb(skb);
2146 }
2147
2148 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2149 {
2150 struct tcphdr *tcp;
2151 u32 tmp;
2152
2153 if ((skb->protocol == htons(ETH_P_IP)) &&
2154 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2155 tcp = (struct tcphdr *)(skb_network_header(skb) +
2156 (ip_hdr(skb)->ihl * 4));
2157 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2158 tmp += ip_hdr(skb)->daddr % 31;
2159 return tmp % num_qps;
2160 } else
2161 return 0;
2162 }
2163
2164 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2165 {
2166 struct ehea_port *port = netdev_priv(dev);
2167 struct ehea_swqe *swqe;
2168 unsigned long flags;
2169 u32 lkey;
2170 int swqe_index;
2171 struct ehea_port_res *pr;
2172
2173 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2174
2175 if (!spin_trylock(&pr->xmit_lock))
2176 return NETDEV_TX_BUSY;
2177
2178 if (pr->queue_stopped) {
2179 spin_unlock(&pr->xmit_lock);
2180 return NETDEV_TX_BUSY;
2181 }
2182
2183 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2184 memset(swqe, 0, SWQE_HEADER_SIZE);
2185 atomic_dec(&pr->swqe_avail);
2186
2187 if (skb->len <= SWQE3_MAX_IMM) {
2188 u32 sig_iv = port->sig_comp_iv;
2189 u32 swqe_num = pr->swqe_id_counter;
2190 ehea_xmit3(skb, dev, swqe);
2191 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2192 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2193 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2194 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2195 sig_iv);
2196 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2197 pr->swqe_ll_count = 0;
2198 } else
2199 pr->swqe_ll_count += 1;
2200 } else {
2201 swqe->wr_id =
2202 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2203 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2204 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2205 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2206 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2207
2208 pr->sq_skba.index++;
2209 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2210
2211 lkey = pr->send_mr.lkey;
2212 ehea_xmit2(skb, dev, swqe, lkey);
2213 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2214 }
2215 pr->swqe_id_counter += 1;
2216
2217 if (port->vgrp && vlan_tx_tag_present(skb)) {
2218 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2219 swqe->vlan_tag = vlan_tx_tag_get(skb);
2220 }
2221
2222 if (netif_msg_tx_queued(port)) {
2223 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2224 ehea_dump(swqe, 512, "swqe");
2225 }
2226
2227 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2228 netif_stop_queue(dev);
2229 swqe->tx_control |= EHEA_SWQE_PURGE;
2230 }
2231
2232 ehea_post_swqe(pr->qp, swqe);
2233 pr->tx_packets++;
2234
2235 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2236 spin_lock_irqsave(&pr->netif_queue, flags);
2237 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2238 pr->p_stats.queue_stopped++;
2239 netif_stop_queue(dev);
2240 pr->queue_stopped = 1;
2241 }
2242 spin_unlock_irqrestore(&pr->netif_queue, flags);
2243 }
2244 dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2245 spin_unlock(&pr->xmit_lock);
2246
2247 return NETDEV_TX_OK;
2248 }
2249
2250 static void ehea_vlan_rx_register(struct net_device *dev,
2251 struct vlan_group *grp)
2252 {
2253 struct ehea_port *port = netdev_priv(dev);
2254 struct ehea_adapter *adapter = port->adapter;
2255 struct hcp_ehea_port_cb1 *cb1;
2256 u64 hret;
2257
2258 port->vgrp = grp;
2259
2260 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2261 if (!cb1) {
2262 ehea_error("no mem for cb1");
2263 goto out;
2264 }
2265
2266 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2267 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2268 if (hret != H_SUCCESS)
2269 ehea_error("modify_ehea_port failed");
2270
2271 free_page((unsigned long)cb1);
2272 out:
2273 return;
2274 }
2275
2276 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2277 {
2278 struct ehea_port *port = netdev_priv(dev);
2279 struct ehea_adapter *adapter = port->adapter;
2280 struct hcp_ehea_port_cb1 *cb1;
2281 int index;
2282 u64 hret;
2283
2284 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2285 if (!cb1) {
2286 ehea_error("no mem for cb1");
2287 goto out;
2288 }
2289
2290 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2291 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2292 if (hret != H_SUCCESS) {
2293 ehea_error("query_ehea_port failed");
2294 goto out;
2295 }
2296
2297 index = (vid / 64);
2298 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2299
2300 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2301 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2302 if (hret != H_SUCCESS)
2303 ehea_error("modify_ehea_port failed");
2304 out:
2305 free_page((unsigned long)cb1);
2306 return;
2307 }
2308
2309 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2310 {
2311 struct ehea_port *port = netdev_priv(dev);
2312 struct ehea_adapter *adapter = port->adapter;
2313 struct hcp_ehea_port_cb1 *cb1;
2314 int index;
2315 u64 hret;
2316
2317 vlan_group_set_device(port->vgrp, vid, NULL);
2318
2319 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2320 if (!cb1) {
2321 ehea_error("no mem for cb1");
2322 goto out;
2323 }
2324
2325 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2326 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2327 if (hret != H_SUCCESS) {
2328 ehea_error("query_ehea_port failed");
2329 goto out;
2330 }
2331
2332 index = (vid / 64);
2333 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2334
2335 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2336 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2337 if (hret != H_SUCCESS)
2338 ehea_error("modify_ehea_port failed");
2339 out:
2340 free_page((unsigned long)cb1);
2341 return;
2342 }
2343
2344 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2345 {
2346 int ret = -EIO;
2347 u64 hret;
2348 u16 dummy16 = 0;
2349 u64 dummy64 = 0;
2350 struct hcp_modify_qp_cb0 *cb0;
2351
2352 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2353 if (!cb0) {
2354 ret = -ENOMEM;
2355 goto out;
2356 }
2357
2358 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2359 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2360 if (hret != H_SUCCESS) {
2361 ehea_error("query_ehea_qp failed (1)");
2362 goto out;
2363 }
2364
2365 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2366 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2367 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2368 &dummy64, &dummy64, &dummy16, &dummy16);
2369 if (hret != H_SUCCESS) {
2370 ehea_error("modify_ehea_qp failed (1)");
2371 goto out;
2372 }
2373
2374 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2375 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2376 if (hret != H_SUCCESS) {
2377 ehea_error("query_ehea_qp failed (2)");
2378 goto out;
2379 }
2380
2381 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2382 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2383 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2384 &dummy64, &dummy64, &dummy16, &dummy16);
2385 if (hret != H_SUCCESS) {
2386 ehea_error("modify_ehea_qp failed (2)");
2387 goto out;
2388 }
2389
2390 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2391 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2392 if (hret != H_SUCCESS) {
2393 ehea_error("query_ehea_qp failed (3)");
2394 goto out;
2395 }
2396
2397 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2398 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2399 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2400 &dummy64, &dummy64, &dummy16, &dummy16);
2401 if (hret != H_SUCCESS) {
2402 ehea_error("modify_ehea_qp failed (3)");
2403 goto out;
2404 }
2405
2406 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2407 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2408 if (hret != H_SUCCESS) {
2409 ehea_error("query_ehea_qp failed (4)");
2410 goto out;
2411 }
2412
2413 ret = 0;
2414 out:
2415 free_page((unsigned long)cb0);
2416 return ret;
2417 }
2418
2419 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2420 int add_tx_qps)
2421 {
2422 int ret, i;
2423 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2424 enum ehea_eq_type eq_type = EHEA_EQ;
2425
2426 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2427 EHEA_MAX_ENTRIES_EQ, 1);
2428 if (!port->qp_eq) {
2429 ret = -EINVAL;
2430 ehea_error("ehea_create_eq failed (qp_eq)");
2431 goto out_kill_eq;
2432 }
2433
2434 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2435 pr_cfg.max_entries_scq = sq_entries * 2;
2436 pr_cfg.max_entries_sq = sq_entries;
2437 pr_cfg.max_entries_rq1 = rq1_entries;
2438 pr_cfg.max_entries_rq2 = rq2_entries;
2439 pr_cfg.max_entries_rq3 = rq3_entries;
2440
2441 pr_cfg_small_rx.max_entries_rcq = 1;
2442 pr_cfg_small_rx.max_entries_scq = sq_entries;
2443 pr_cfg_small_rx.max_entries_sq = sq_entries;
2444 pr_cfg_small_rx.max_entries_rq1 = 1;
2445 pr_cfg_small_rx.max_entries_rq2 = 1;
2446 pr_cfg_small_rx.max_entries_rq3 = 1;
2447
2448 for (i = 0; i < def_qps; i++) {
2449 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2450 if (ret)
2451 goto out_clean_pr;
2452 }
2453 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2454 ret = ehea_init_port_res(port, &port->port_res[i],
2455 &pr_cfg_small_rx, i);
2456 if (ret)
2457 goto out_clean_pr;
2458 }
2459
2460 return 0;
2461
2462 out_clean_pr:
2463 while (--i >= 0)
2464 ehea_clean_portres(port, &port->port_res[i]);
2465
2466 out_kill_eq:
2467 ehea_destroy_eq(port->qp_eq);
2468 return ret;
2469 }
2470
2471 static int ehea_clean_all_portres(struct ehea_port *port)
2472 {
2473 int ret = 0;
2474 int i;
2475
2476 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2477 ret |= ehea_clean_portres(port, &port->port_res[i]);
2478
2479 ret |= ehea_destroy_eq(port->qp_eq);
2480
2481 return ret;
2482 }
2483
2484 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2485 {
2486 if (adapter->active_ports)
2487 return;
2488
2489 ehea_rem_mr(&adapter->mr);
2490 }
2491
2492 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2493 {
2494 if (adapter->active_ports)
2495 return 0;
2496
2497 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2498 }
2499
2500 static int ehea_up(struct net_device *dev)
2501 {
2502 int ret, i;
2503 struct ehea_port *port = netdev_priv(dev);
2504
2505 if (port->state == EHEA_PORT_UP)
2506 return 0;
2507
2508 ret = ehea_port_res_setup(port, port->num_def_qps,
2509 port->num_add_tx_qps);
2510 if (ret) {
2511 ehea_error("port_res_failed");
2512 goto out;
2513 }
2514
2515 /* Set default QP for this port */
2516 ret = ehea_configure_port(port);
2517 if (ret) {
2518 ehea_error("ehea_configure_port failed. ret:%d", ret);
2519 goto out_clean_pr;
2520 }
2521
2522 ret = ehea_reg_interrupts(dev);
2523 if (ret) {
2524 ehea_error("reg_interrupts failed. ret:%d", ret);
2525 goto out_clean_pr;
2526 }
2527
2528 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2529 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2530 if (ret) {
2531 ehea_error("activate_qp failed");
2532 goto out_free_irqs;
2533 }
2534 }
2535
2536 for (i = 0; i < port->num_def_qps; i++) {
2537 ret = ehea_fill_port_res(&port->port_res[i]);
2538 if (ret) {
2539 ehea_error("out_free_irqs");
2540 goto out_free_irqs;
2541 }
2542 }
2543
2544 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2545 if (ret) {
2546 ret = -EIO;
2547 goto out_free_irqs;
2548 }
2549
2550 port->state = EHEA_PORT_UP;
2551
2552 ret = 0;
2553 goto out;
2554
2555 out_free_irqs:
2556 ehea_free_interrupts(dev);
2557
2558 out_clean_pr:
2559 ehea_clean_all_portres(port);
2560 out:
2561 if (ret)
2562 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2563
2564 ehea_update_bcmc_registrations();
2565 ehea_update_firmware_handles();
2566
2567 return ret;
2568 }
2569
2570 static void port_napi_disable(struct ehea_port *port)
2571 {
2572 int i;
2573
2574 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2575 napi_disable(&port->port_res[i].napi);
2576 }
2577
2578 static void port_napi_enable(struct ehea_port *port)
2579 {
2580 int i;
2581
2582 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2583 napi_enable(&port->port_res[i].napi);
2584 }
2585
2586 static int ehea_open(struct net_device *dev)
2587 {
2588 int ret;
2589 struct ehea_port *port = netdev_priv(dev);
2590
2591 mutex_lock(&port->port_lock);
2592
2593 if (netif_msg_ifup(port))
2594 ehea_info("enabling port %s", dev->name);
2595
2596 ret = ehea_up(dev);
2597 if (!ret) {
2598 port_napi_enable(port);
2599 netif_start_queue(dev);
2600 }
2601
2602 mutex_unlock(&port->port_lock);
2603
2604 return ret;
2605 }
2606
2607 static int ehea_down(struct net_device *dev)
2608 {
2609 int ret;
2610 struct ehea_port *port = netdev_priv(dev);
2611
2612 if (port->state == EHEA_PORT_DOWN)
2613 return 0;
2614
2615 ehea_drop_multicast_list(dev);
2616 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2617
2618 ehea_free_interrupts(dev);
2619
2620 port->state = EHEA_PORT_DOWN;
2621
2622 ehea_update_bcmc_registrations();
2623
2624 ret = ehea_clean_all_portres(port);
2625 if (ret)
2626 ehea_info("Failed freeing resources for %s. ret=%i",
2627 dev->name, ret);
2628
2629 ehea_update_firmware_handles();
2630
2631 return ret;
2632 }
2633
2634 static int ehea_stop(struct net_device *dev)
2635 {
2636 int ret;
2637 struct ehea_port *port = netdev_priv(dev);
2638
2639 if (netif_msg_ifdown(port))
2640 ehea_info("disabling port %s", dev->name);
2641
2642 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2643 cancel_work_sync(&port->reset_task);
2644 mutex_lock(&port->port_lock);
2645 netif_stop_queue(dev);
2646 port_napi_disable(port);
2647 ret = ehea_down(dev);
2648 mutex_unlock(&port->port_lock);
2649 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2650 return ret;
2651 }
2652
2653 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2654 {
2655 struct ehea_qp qp = *orig_qp;
2656 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2657 struct ehea_swqe *swqe;
2658 int wqe_index;
2659 int i;
2660
2661 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2662 swqe = ehea_get_swqe(&qp, &wqe_index);
2663 swqe->tx_control |= EHEA_SWQE_PURGE;
2664 }
2665 }
2666
2667 static void ehea_flush_sq(struct ehea_port *port)
2668 {
2669 int i;
2670
2671 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2672 struct ehea_port_res *pr = &port->port_res[i];
2673 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2674 int k = 0;
2675 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2676 msleep(5);
2677 if (++k == 20)
2678 break;
2679 }
2680 }
2681 }
2682
2683 int ehea_stop_qps(struct net_device *dev)
2684 {
2685 struct ehea_port *port = netdev_priv(dev);
2686 struct ehea_adapter *adapter = port->adapter;
2687 struct hcp_modify_qp_cb0 *cb0;
2688 int ret = -EIO;
2689 int dret;
2690 int i;
2691 u64 hret;
2692 u64 dummy64 = 0;
2693 u16 dummy16 = 0;
2694
2695 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2696 if (!cb0) {
2697 ret = -ENOMEM;
2698 goto out;
2699 }
2700
2701 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2702 struct ehea_port_res *pr = &port->port_res[i];
2703 struct ehea_qp *qp = pr->qp;
2704
2705 /* Purge send queue */
2706 ehea_purge_sq(qp);
2707
2708 /* Disable queue pair */
2709 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2710 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2711 cb0);
2712 if (hret != H_SUCCESS) {
2713 ehea_error("query_ehea_qp failed (1)");
2714 goto out;
2715 }
2716
2717 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2718 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2719
2720 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2721 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2722 1), cb0, &dummy64,
2723 &dummy64, &dummy16, &dummy16);
2724 if (hret != H_SUCCESS) {
2725 ehea_error("modify_ehea_qp failed (1)");
2726 goto out;
2727 }
2728
2729 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2730 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2731 cb0);
2732 if (hret != H_SUCCESS) {
2733 ehea_error("query_ehea_qp failed (2)");
2734 goto out;
2735 }
2736
2737 /* deregister shared memory regions */
2738 dret = ehea_rem_smrs(pr);
2739 if (dret) {
2740 ehea_error("unreg shared memory region failed");
2741 goto out;
2742 }
2743 }
2744
2745 ret = 0;
2746 out:
2747 free_page((unsigned long)cb0);
2748
2749 return ret;
2750 }
2751
2752 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2753 {
2754 struct ehea_qp qp = *orig_qp;
2755 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2756 struct ehea_rwqe *rwqe;
2757 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2758 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2759 struct sk_buff *skb;
2760 u32 lkey = pr->recv_mr.lkey;
2761
2762
2763 int i;
2764 int index;
2765
2766 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2767 rwqe = ehea_get_next_rwqe(&qp, 2);
2768 rwqe->sg_list[0].l_key = lkey;
2769 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2770 skb = skba_rq2[index];
2771 if (skb)
2772 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2773 }
2774
2775 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2776 rwqe = ehea_get_next_rwqe(&qp, 3);
2777 rwqe->sg_list[0].l_key = lkey;
2778 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2779 skb = skba_rq3[index];
2780 if (skb)
2781 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2782 }
2783 }
2784
2785 int ehea_restart_qps(struct net_device *dev)
2786 {
2787 struct ehea_port *port = netdev_priv(dev);
2788 struct ehea_adapter *adapter = port->adapter;
2789 int ret = 0;
2790 int i;
2791
2792 struct hcp_modify_qp_cb0 *cb0;
2793 u64 hret;
2794 u64 dummy64 = 0;
2795 u16 dummy16 = 0;
2796
2797 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2798 if (!cb0) {
2799 ret = -ENOMEM;
2800 goto out;
2801 }
2802
2803 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2804 struct ehea_port_res *pr = &port->port_res[i];
2805 struct ehea_qp *qp = pr->qp;
2806
2807 ret = ehea_gen_smrs(pr);
2808 if (ret) {
2809 ehea_error("creation of shared memory regions failed");
2810 goto out;
2811 }
2812
2813 ehea_update_rqs(qp, pr);
2814
2815 /* Enable queue pair */
2816 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2817 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2818 cb0);
2819 if (hret != H_SUCCESS) {
2820 ehea_error("query_ehea_qp failed (1)");
2821 goto out;
2822 }
2823
2824 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2825 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2826
2827 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2828 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2829 1), cb0, &dummy64,
2830 &dummy64, &dummy16, &dummy16);
2831 if (hret != H_SUCCESS) {
2832 ehea_error("modify_ehea_qp failed (1)");
2833 goto out;
2834 }
2835
2836 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2837 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2838 cb0);
2839 if (hret != H_SUCCESS) {
2840 ehea_error("query_ehea_qp failed (2)");
2841 goto out;
2842 }
2843
2844 /* refill entire queue */
2845 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2846 ehea_refill_rq2(pr, 0);
2847 ehea_refill_rq3(pr, 0);
2848 }
2849 out:
2850 free_page((unsigned long)cb0);
2851
2852 return ret;
2853 }
2854
2855 static void ehea_reset_port(struct work_struct *work)
2856 {
2857 int ret;
2858 struct ehea_port *port =
2859 container_of(work, struct ehea_port, reset_task);
2860 struct net_device *dev = port->netdev;
2861
2862 port->resets++;
2863 mutex_lock(&port->port_lock);
2864 netif_stop_queue(dev);
2865
2866 port_napi_disable(port);
2867
2868 ehea_down(dev);
2869
2870 ret = ehea_up(dev);
2871 if (ret)
2872 goto out;
2873
2874 ehea_set_multicast_list(dev);
2875
2876 if (netif_msg_timer(port))
2877 ehea_info("Device %s resetted successfully", dev->name);
2878
2879 port_napi_enable(port);
2880
2881 netif_wake_queue(dev);
2882 out:
2883 mutex_unlock(&port->port_lock);
2884 return;
2885 }
2886
2887 static void ehea_rereg_mrs(struct work_struct *work)
2888 {
2889 int ret, i;
2890 struct ehea_adapter *adapter;
2891
2892 ehea_info("LPAR memory changed - re-initializing driver");
2893
2894 list_for_each_entry(adapter, &adapter_list, list)
2895 if (adapter->active_ports) {
2896 /* Shutdown all ports */
2897 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2898 struct ehea_port *port = adapter->port[i];
2899 struct net_device *dev;
2900
2901 if (!port)
2902 continue;
2903
2904 dev = port->netdev;
2905
2906 if (dev->flags & IFF_UP) {
2907 mutex_lock(&port->port_lock);
2908 netif_stop_queue(dev);
2909 ehea_flush_sq(port);
2910 ret = ehea_stop_qps(dev);
2911 if (ret) {
2912 mutex_unlock(&port->port_lock);
2913 goto out;
2914 }
2915 port_napi_disable(port);
2916 mutex_unlock(&port->port_lock);
2917 }
2918 }
2919
2920 /* Unregister old memory region */
2921 ret = ehea_rem_mr(&adapter->mr);
2922 if (ret) {
2923 ehea_error("unregister MR failed - driver"
2924 " inoperable!");
2925 goto out;
2926 }
2927 }
2928
2929 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2930
2931 list_for_each_entry(adapter, &adapter_list, list)
2932 if (adapter->active_ports) {
2933 /* Register new memory region */
2934 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2935 if (ret) {
2936 ehea_error("register MR failed - driver"
2937 " inoperable!");
2938 goto out;
2939 }
2940
2941 /* Restart all ports */
2942 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2943 struct ehea_port *port = adapter->port[i];
2944
2945 if (port) {
2946 struct net_device *dev = port->netdev;
2947
2948 if (dev->flags & IFF_UP) {
2949 mutex_lock(&port->port_lock);
2950 port_napi_enable(port);
2951 ret = ehea_restart_qps(dev);
2952 if (!ret)
2953 netif_wake_queue(dev);
2954 mutex_unlock(&port->port_lock);
2955 }
2956 }
2957 }
2958 }
2959 ehea_info("re-initializing driver complete");
2960 out:
2961 return;
2962 }
2963
2964 static void ehea_tx_watchdog(struct net_device *dev)
2965 {
2966 struct ehea_port *port = netdev_priv(dev);
2967
2968 if (netif_carrier_ok(dev) &&
2969 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2970 ehea_schedule_port_reset(port);
2971 }
2972
2973 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2974 {
2975 struct hcp_query_ehea *cb;
2976 u64 hret;
2977 int ret;
2978
2979 cb = (void *)get_zeroed_page(GFP_KERNEL);
2980 if (!cb) {
2981 ret = -ENOMEM;
2982 goto out;
2983 }
2984
2985 hret = ehea_h_query_ehea(adapter->handle, cb);
2986
2987 if (hret != H_SUCCESS) {
2988 ret = -EIO;
2989 goto out_herr;
2990 }
2991
2992 adapter->max_mc_mac = cb->max_mc_mac - 1;
2993 ret = 0;
2994
2995 out_herr:
2996 free_page((unsigned long)cb);
2997 out:
2998 return ret;
2999 }
3000
3001 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3002 {
3003 struct hcp_ehea_port_cb4 *cb4;
3004 u64 hret;
3005 int ret = 0;
3006
3007 *jumbo = 0;
3008
3009 /* (Try to) enable *jumbo frames */
3010 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3011 if (!cb4) {
3012 ehea_error("no mem for cb4");
3013 ret = -ENOMEM;
3014 goto out;
3015 } else {
3016 hret = ehea_h_query_ehea_port(port->adapter->handle,
3017 port->logical_port_id,
3018 H_PORT_CB4,
3019 H_PORT_CB4_JUMBO, cb4);
3020 if (hret == H_SUCCESS) {
3021 if (cb4->jumbo_frame)
3022 *jumbo = 1;
3023 else {
3024 cb4->jumbo_frame = 1;
3025 hret = ehea_h_modify_ehea_port(port->adapter->
3026 handle,
3027 port->
3028 logical_port_id,
3029 H_PORT_CB4,
3030 H_PORT_CB4_JUMBO,
3031 cb4);
3032 if (hret == H_SUCCESS)
3033 *jumbo = 1;
3034 }
3035 } else
3036 ret = -EINVAL;
3037
3038 free_page((unsigned long)cb4);
3039 }
3040 out:
3041 return ret;
3042 }
3043
3044 static ssize_t ehea_show_port_id(struct device *dev,
3045 struct device_attribute *attr, char *buf)
3046 {
3047 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3048 return sprintf(buf, "%d", port->logical_port_id);
3049 }
3050
3051 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3052 NULL);
3053
3054 static void __devinit logical_port_release(struct device *dev)
3055 {
3056 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3057 of_node_put(port->ofdev.node);
3058 }
3059
3060 static struct device *ehea_register_port(struct ehea_port *port,
3061 struct device_node *dn)
3062 {
3063 int ret;
3064
3065 port->ofdev.node = of_node_get(dn);
3066 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3067 port->ofdev.dev.bus = &ibmebus_bus_type;
3068
3069 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3070 port->ofdev.dev.release = logical_port_release;
3071
3072 ret = of_device_register(&port->ofdev);
3073 if (ret) {
3074 ehea_error("failed to register device. ret=%d", ret);
3075 goto out;
3076 }
3077
3078 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3079 if (ret) {
3080 ehea_error("failed to register attributes, ret=%d", ret);
3081 goto out_unreg_of_dev;
3082 }
3083
3084 return &port->ofdev.dev;
3085
3086 out_unreg_of_dev:
3087 of_device_unregister(&port->ofdev);
3088 out:
3089 return NULL;
3090 }
3091
3092 static void ehea_unregister_port(struct ehea_port *port)
3093 {
3094 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3095 of_device_unregister(&port->ofdev);
3096 }
3097
3098 static const struct net_device_ops ehea_netdev_ops = {
3099 .ndo_open = ehea_open,
3100 .ndo_stop = ehea_stop,
3101 .ndo_start_xmit = ehea_start_xmit,
3102 #ifdef CONFIG_NET_POLL_CONTROLLER
3103 .ndo_poll_controller = ehea_netpoll,
3104 #endif
3105 .ndo_get_stats = ehea_get_stats,
3106 .ndo_set_mac_address = ehea_set_mac_addr,
3107 .ndo_validate_addr = eth_validate_addr,
3108 .ndo_set_multicast_list = ehea_set_multicast_list,
3109 .ndo_change_mtu = ehea_change_mtu,
3110 .ndo_vlan_rx_register = ehea_vlan_rx_register,
3111 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
3112 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
3113 .ndo_tx_timeout = ehea_tx_watchdog,
3114 };
3115
3116 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3117 u32 logical_port_id,
3118 struct device_node *dn)
3119 {
3120 int ret;
3121 struct net_device *dev;
3122 struct ehea_port *port;
3123 struct device *port_dev;
3124 int jumbo;
3125
3126 /* allocate memory for the port structures */
3127 dev = alloc_etherdev(sizeof(struct ehea_port));
3128
3129 if (!dev) {
3130 ehea_error("no mem for net_device");
3131 ret = -ENOMEM;
3132 goto out_err;
3133 }
3134
3135 port = netdev_priv(dev);
3136
3137 mutex_init(&port->port_lock);
3138 port->state = EHEA_PORT_DOWN;
3139 port->sig_comp_iv = sq_entries / 10;
3140
3141 port->adapter = adapter;
3142 port->netdev = dev;
3143 port->logical_port_id = logical_port_id;
3144
3145 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3146
3147 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3148 if (!port->mc_list) {
3149 ret = -ENOMEM;
3150 goto out_free_ethdev;
3151 }
3152
3153 INIT_LIST_HEAD(&port->mc_list->list);
3154
3155 ret = ehea_sense_port_attr(port);
3156 if (ret)
3157 goto out_free_mc_list;
3158
3159 port_dev = ehea_register_port(port, dn);
3160 if (!port_dev)
3161 goto out_free_mc_list;
3162
3163 SET_NETDEV_DEV(dev, port_dev);
3164
3165 /* initialize net_device structure */
3166 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3167
3168 dev->netdev_ops = &ehea_netdev_ops;
3169 ehea_set_ethtool_ops(dev);
3170
3171 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3172 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3173 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3174 | NETIF_F_LLTX;
3175 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3176
3177 INIT_WORK(&port->reset_task, ehea_reset_port);
3178
3179 ret = register_netdev(dev);
3180 if (ret) {
3181 ehea_error("register_netdev failed. ret=%d", ret);
3182 goto out_unreg_port;
3183 }
3184
3185 port->lro_max_aggr = lro_max_aggr;
3186
3187 ret = ehea_get_jumboframe_status(port, &jumbo);
3188 if (ret)
3189 ehea_error("failed determining jumbo frame status for %s",
3190 port->netdev->name);
3191
3192 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3193 jumbo == 1 ? "en" : "dis");
3194
3195 adapter->active_ports++;
3196
3197 return port;
3198
3199 out_unreg_port:
3200 ehea_unregister_port(port);
3201
3202 out_free_mc_list:
3203 kfree(port->mc_list);
3204
3205 out_free_ethdev:
3206 free_netdev(dev);
3207
3208 out_err:
3209 ehea_error("setting up logical port with id=%d failed, ret=%d",
3210 logical_port_id, ret);
3211 return NULL;
3212 }
3213
3214 static void ehea_shutdown_single_port(struct ehea_port *port)
3215 {
3216 struct ehea_adapter *adapter = port->adapter;
3217 unregister_netdev(port->netdev);
3218 ehea_unregister_port(port);
3219 kfree(port->mc_list);
3220 free_netdev(port->netdev);
3221 adapter->active_ports--;
3222 }
3223
3224 static int ehea_setup_ports(struct ehea_adapter *adapter)
3225 {
3226 struct device_node *lhea_dn;
3227 struct device_node *eth_dn = NULL;
3228
3229 const u32 *dn_log_port_id;
3230 int i = 0;
3231
3232 lhea_dn = adapter->ofdev->node;
3233 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3234
3235 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3236 NULL);
3237 if (!dn_log_port_id) {
3238 ehea_error("bad device node: eth_dn name=%s",
3239 eth_dn->full_name);
3240 continue;
3241 }
3242
3243 if (ehea_add_adapter_mr(adapter)) {
3244 ehea_error("creating MR failed");
3245 of_node_put(eth_dn);
3246 return -EIO;
3247 }
3248
3249 adapter->port[i] = ehea_setup_single_port(adapter,
3250 *dn_log_port_id,
3251 eth_dn);
3252 if (adapter->port[i])
3253 ehea_info("%s -> logical port id #%d",
3254 adapter->port[i]->netdev->name,
3255 *dn_log_port_id);
3256 else
3257 ehea_remove_adapter_mr(adapter);
3258
3259 i++;
3260 };
3261 return 0;
3262 }
3263
3264 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3265 u32 logical_port_id)
3266 {
3267 struct device_node *lhea_dn;
3268 struct device_node *eth_dn = NULL;
3269 const u32 *dn_log_port_id;
3270
3271 lhea_dn = adapter->ofdev->node;
3272 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3273
3274 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3275 NULL);
3276 if (dn_log_port_id)
3277 if (*dn_log_port_id == logical_port_id)
3278 return eth_dn;
3279 };
3280
3281 return NULL;
3282 }
3283
3284 static ssize_t ehea_probe_port(struct device *dev,
3285 struct device_attribute *attr,
3286 const char *buf, size_t count)
3287 {
3288 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3289 struct ehea_port *port;
3290 struct device_node *eth_dn = NULL;
3291 int i;
3292
3293 u32 logical_port_id;
3294
3295 sscanf(buf, "%d", &logical_port_id);
3296
3297 port = ehea_get_port(adapter, logical_port_id);
3298
3299 if (port) {
3300 ehea_info("adding port with logical port id=%d failed. port "
3301 "already configured as %s.", logical_port_id,
3302 port->netdev->name);
3303 return -EINVAL;
3304 }
3305
3306 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3307
3308 if (!eth_dn) {
3309 ehea_info("no logical port with id %d found", logical_port_id);
3310 return -EINVAL;
3311 }
3312
3313 if (ehea_add_adapter_mr(adapter)) {
3314 ehea_error("creating MR failed");
3315 return -EIO;
3316 }
3317
3318 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3319
3320 of_node_put(eth_dn);
3321
3322 if (port) {
3323 for (i = 0; i < EHEA_MAX_PORTS; i++)
3324 if (!adapter->port[i]) {
3325 adapter->port[i] = port;
3326 break;
3327 }
3328
3329 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3330 logical_port_id);
3331 } else {
3332 ehea_remove_adapter_mr(adapter);
3333 return -EIO;
3334 }
3335
3336 return (ssize_t) count;
3337 }
3338
3339 static ssize_t ehea_remove_port(struct device *dev,
3340 struct device_attribute *attr,
3341 const char *buf, size_t count)
3342 {
3343 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3344 struct ehea_port *port;
3345 int i;
3346 u32 logical_port_id;
3347
3348 sscanf(buf, "%d", &logical_port_id);
3349
3350 port = ehea_get_port(adapter, logical_port_id);
3351
3352 if (port) {
3353 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3354 logical_port_id);
3355
3356 ehea_shutdown_single_port(port);
3357
3358 for (i = 0; i < EHEA_MAX_PORTS; i++)
3359 if (adapter->port[i] == port) {
3360 adapter->port[i] = NULL;
3361 break;
3362 }
3363 } else {
3364 ehea_error("removing port with logical port id=%d failed. port "
3365 "not configured.", logical_port_id);
3366 return -EINVAL;
3367 }
3368
3369 ehea_remove_adapter_mr(adapter);
3370
3371 return (ssize_t) count;
3372 }
3373
3374 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3375 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3376
3377 int ehea_create_device_sysfs(struct of_device *dev)
3378 {
3379 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3380 if (ret)
3381 goto out;
3382
3383 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3384 out:
3385 return ret;
3386 }
3387
3388 void ehea_remove_device_sysfs(struct of_device *dev)
3389 {
3390 device_remove_file(&dev->dev, &dev_attr_probe_port);
3391 device_remove_file(&dev->dev, &dev_attr_remove_port);
3392 }
3393
3394 static int __devinit ehea_probe_adapter(struct of_device *dev,
3395 const struct of_device_id *id)
3396 {
3397 struct ehea_adapter *adapter;
3398 const u64 *adapter_handle;
3399 int ret;
3400
3401 if (!dev || !dev->node) {
3402 ehea_error("Invalid ibmebus device probed");
3403 return -EINVAL;
3404 }
3405
3406 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3407 if (!adapter) {
3408 ret = -ENOMEM;
3409 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3410 goto out;
3411 }
3412
3413 list_add(&adapter->list, &adapter_list);
3414
3415 adapter->ofdev = dev;
3416
3417 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3418 NULL);
3419 if (adapter_handle)
3420 adapter->handle = *adapter_handle;
3421
3422 if (!adapter->handle) {
3423 dev_err(&dev->dev, "failed getting handle for adapter"
3424 " '%s'\n", dev->node->full_name);
3425 ret = -ENODEV;
3426 goto out_free_ad;
3427 }
3428
3429 adapter->pd = EHEA_PD_ID;
3430
3431 dev_set_drvdata(&dev->dev, adapter);
3432
3433
3434 /* initialize adapter and ports */
3435 /* get adapter properties */
3436 ret = ehea_sense_adapter_attr(adapter);
3437 if (ret) {
3438 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3439 goto out_free_ad;
3440 }
3441
3442 adapter->neq = ehea_create_eq(adapter,
3443 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3444 if (!adapter->neq) {
3445 ret = -EIO;
3446 dev_err(&dev->dev, "NEQ creation failed\n");
3447 goto out_free_ad;
3448 }
3449
3450 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3451 (unsigned long)adapter);
3452
3453 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3454 ehea_interrupt_neq, IRQF_DISABLED,
3455 "ehea_neq", adapter);
3456 if (ret) {
3457 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3458 goto out_kill_eq;
3459 }
3460
3461 ret = ehea_create_device_sysfs(dev);
3462 if (ret)
3463 goto out_free_irq;
3464
3465 ret = ehea_setup_ports(adapter);
3466 if (ret) {
3467 dev_err(&dev->dev, "setup_ports failed\n");
3468 goto out_rem_dev_sysfs;
3469 }
3470
3471 ret = 0;
3472 goto out;
3473
3474 out_rem_dev_sysfs:
3475 ehea_remove_device_sysfs(dev);
3476
3477 out_free_irq:
3478 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3479
3480 out_kill_eq:
3481 ehea_destroy_eq(adapter->neq);
3482
3483 out_free_ad:
3484 list_del(&adapter->list);
3485 kfree(adapter);
3486
3487 out:
3488 ehea_update_firmware_handles();
3489
3490 return ret;
3491 }
3492
3493 static int __devexit ehea_remove(struct of_device *dev)
3494 {
3495 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3496 int i;
3497
3498 for (i = 0; i < EHEA_MAX_PORTS; i++)
3499 if (adapter->port[i]) {
3500 ehea_shutdown_single_port(adapter->port[i]);
3501 adapter->port[i] = NULL;
3502 }
3503
3504 ehea_remove_device_sysfs(dev);
3505
3506 flush_scheduled_work();
3507
3508 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3509 tasklet_kill(&adapter->neq_tasklet);
3510
3511 ehea_destroy_eq(adapter->neq);
3512 ehea_remove_adapter_mr(adapter);
3513 list_del(&adapter->list);
3514 kfree(adapter);
3515
3516 ehea_update_firmware_handles();
3517
3518 return 0;
3519 }
3520
3521 void ehea_crash_handler(void)
3522 {
3523 int i;
3524
3525 if (ehea_fw_handles.arr)
3526 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3527 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3528 ehea_fw_handles.arr[i].fwh,
3529 FORCE_FREE);
3530
3531 if (ehea_bcmc_regs.arr)
3532 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3533 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3534 ehea_bcmc_regs.arr[i].port_id,
3535 ehea_bcmc_regs.arr[i].reg_type,
3536 ehea_bcmc_regs.arr[i].macaddr,
3537 0, H_DEREG_BCMC);
3538 }
3539
3540 static int ehea_mem_notifier(struct notifier_block *nb,
3541 unsigned long action, void *data)
3542 {
3543 int ret = NOTIFY_BAD;
3544 struct memory_notify *arg = data;
3545
3546 if (!mutex_trylock(&dlpar_mem_lock)) {
3547 ehea_info("ehea_mem_notifier must not be called parallelized");
3548 goto out;
3549 }
3550
3551 switch (action) {
3552 case MEM_CANCEL_OFFLINE:
3553 ehea_info("memory offlining canceled");
3554 /* Readd canceled memory block */
3555 case MEM_ONLINE:
3556 ehea_info("memory is going online");
3557 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3558 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3559 goto out_unlock;
3560 ehea_rereg_mrs(NULL);
3561 break;
3562 case MEM_GOING_OFFLINE:
3563 ehea_info("memory is going offline");
3564 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3565 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3566 goto out_unlock;
3567 ehea_rereg_mrs(NULL);
3568 break;
3569 default:
3570 break;
3571 }
3572
3573 ehea_update_firmware_handles();
3574 ret = NOTIFY_OK;
3575
3576 out_unlock:
3577 mutex_unlock(&dlpar_mem_lock);
3578 out:
3579 return ret;
3580 }
3581
3582 static struct notifier_block ehea_mem_nb = {
3583 .notifier_call = ehea_mem_notifier,
3584 };
3585
3586 static int ehea_reboot_notifier(struct notifier_block *nb,
3587 unsigned long action, void *unused)
3588 {
3589 if (action == SYS_RESTART) {
3590 ehea_info("Reboot: freeing all eHEA resources");
3591 ibmebus_unregister_driver(&ehea_driver);
3592 }
3593 return NOTIFY_DONE;
3594 }
3595
3596 static struct notifier_block ehea_reboot_nb = {
3597 .notifier_call = ehea_reboot_notifier,
3598 };
3599
3600 static int check_module_parm(void)
3601 {
3602 int ret = 0;
3603
3604 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3605 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3606 ehea_info("Bad parameter: rq1_entries");
3607 ret = -EINVAL;
3608 }
3609 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3610 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3611 ehea_info("Bad parameter: rq2_entries");
3612 ret = -EINVAL;
3613 }
3614 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3615 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3616 ehea_info("Bad parameter: rq3_entries");
3617 ret = -EINVAL;
3618 }
3619 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3620 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3621 ehea_info("Bad parameter: sq_entries");
3622 ret = -EINVAL;
3623 }
3624
3625 return ret;
3626 }
3627
3628 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3629 char *buf)
3630 {
3631 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3632 }
3633
3634 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3635 ehea_show_capabilities, NULL);
3636
3637 int __init ehea_module_init(void)
3638 {
3639 int ret;
3640
3641 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3642 DRV_VERSION);
3643
3644
3645 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3646 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3647 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3648
3649 mutex_init(&ehea_fw_handles.lock);
3650 spin_lock_init(&ehea_bcmc_regs.lock);
3651
3652 ret = check_module_parm();
3653 if (ret)
3654 goto out;
3655
3656 ret = ehea_create_busmap();
3657 if (ret)
3658 goto out;
3659
3660 ret = register_reboot_notifier(&ehea_reboot_nb);
3661 if (ret)
3662 ehea_info("failed registering reboot notifier");
3663
3664 ret = register_memory_notifier(&ehea_mem_nb);
3665 if (ret)
3666 ehea_info("failed registering memory remove notifier");
3667
3668 ret = crash_shutdown_register(&ehea_crash_handler);
3669 if (ret)
3670 ehea_info("failed registering crash handler");
3671
3672 ret = ibmebus_register_driver(&ehea_driver);
3673 if (ret) {
3674 ehea_error("failed registering eHEA device driver on ebus");
3675 goto out2;
3676 }
3677
3678 ret = driver_create_file(&ehea_driver.driver,
3679 &driver_attr_capabilities);
3680 if (ret) {
3681 ehea_error("failed to register capabilities attribute, ret=%d",
3682 ret);
3683 goto out3;
3684 }
3685
3686 return ret;
3687
3688 out3:
3689 ibmebus_unregister_driver(&ehea_driver);
3690 out2:
3691 unregister_memory_notifier(&ehea_mem_nb);
3692 unregister_reboot_notifier(&ehea_reboot_nb);
3693 crash_shutdown_unregister(&ehea_crash_handler);
3694 out:
3695 return ret;
3696 }
3697
3698 static void __exit ehea_module_exit(void)
3699 {
3700 int ret;
3701
3702 flush_scheduled_work();
3703 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3704 ibmebus_unregister_driver(&ehea_driver);
3705 unregister_reboot_notifier(&ehea_reboot_nb);
3706 ret = crash_shutdown_unregister(&ehea_crash_handler);
3707 if (ret)
3708 ehea_info("failed unregistering crash handler");
3709 unregister_memory_notifier(&ehea_mem_nb);
3710 kfree(ehea_fw_handles.arr);
3711 kfree(ehea_bcmc_regs.arr);
3712 ehea_destroy_busmap();
3713 }
3714
3715 module_init(ehea_module_init);
3716 module_exit(ehea_module_exit);
Linux kernel - Deliverables
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