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ondemand: Solve a big performance issue by counting IOWAIT time as busy
[linux/fpc-iii.git] / drivers / net / ehea / ehea_main.c
blob809ccc9ff09cc8913a8e19ab1982cf76e7d69000
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("Send Completion Error: Resetting port");
795 if (netif_msg_tx_err(pr->port))
796 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
797 ehea_schedule_port_reset(pr->port);
798 break;
799 }
800
801 if (netif_msg_tx_done(pr->port))
802 ehea_dump(cqe, sizeof(*cqe), "CQE");
803
804 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
805 == EHEA_SWQE2_TYPE)) {
806
807 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
808 skb = pr->sq_skba.arr[index];
809 dev_kfree_skb(skb);
810 pr->sq_skba.arr[index] = NULL;
811 }
812
813 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
814 quota--;
815
816 cqe = ehea_poll_cq(send_cq);
817 };
818
819 ehea_update_feca(send_cq, cqe_counter);
820 atomic_add(swqe_av, &pr->swqe_avail);
821
822 spin_lock_irqsave(&pr->netif_queue, flags);
823
824 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
825 >= pr->swqe_refill_th)) {
826 netif_wake_queue(pr->port->netdev);
827 pr->queue_stopped = 0;
828 }
829 spin_unlock_irqrestore(&pr->netif_queue, flags);
830
831 return cqe;
832 }
833
834 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
835 #define EHEA_POLL_MAX_CQES 65535
836
837 static int ehea_poll(struct napi_struct *napi, int budget)
838 {
839 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
840 napi);
841 struct net_device *dev = pr->port->netdev;
842 struct ehea_cqe *cqe;
843 struct ehea_cqe *cqe_skb = NULL;
844 int force_irq, wqe_index;
845 int rx = 0;
846
847 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
848 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
849
850 if (!force_irq)
851 rx += ehea_proc_rwqes(dev, pr, budget - rx);
852
853 while ((rx != budget) || force_irq) {
854 pr->poll_counter = 0;
855 force_irq = 0;
856 napi_complete(napi);
857 ehea_reset_cq_ep(pr->recv_cq);
858 ehea_reset_cq_ep(pr->send_cq);
859 ehea_reset_cq_n1(pr->recv_cq);
860 ehea_reset_cq_n1(pr->send_cq);
861 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
862 cqe_skb = ehea_poll_cq(pr->send_cq);
863
864 if (!cqe && !cqe_skb)
865 return rx;
866
867 if (!napi_reschedule(napi))
868 return rx;
869
870 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
871 rx += ehea_proc_rwqes(dev, pr, budget - rx);
872 }
873
874 pr->poll_counter++;
875 return rx;
876 }
877
878 #ifdef CONFIG_NET_POLL_CONTROLLER
879 static void ehea_netpoll(struct net_device *dev)
880 {
881 struct ehea_port *port = netdev_priv(dev);
882 int i;
883
884 for (i = 0; i < port->num_def_qps; i++)
885 napi_schedule(&port->port_res[i].napi);
886 }
887 #endif
888
889 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
890 {
891 struct ehea_port_res *pr = param;
892
893 napi_schedule(&pr->napi);
894
895 return IRQ_HANDLED;
896 }
897
898 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
899 {
900 struct ehea_port *port = param;
901 struct ehea_eqe *eqe;
902 struct ehea_qp *qp;
903 u32 qp_token;
904
905 eqe = ehea_poll_eq(port->qp_eq);
906
907 while (eqe) {
908 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
909 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
910 eqe->entry, qp_token);
911
912 qp = port->port_res[qp_token].qp;
913 ehea_error_data(port->adapter, qp->fw_handle);
914 eqe = ehea_poll_eq(port->qp_eq);
915 }
916
917 ehea_schedule_port_reset(port);
918
919 return IRQ_HANDLED;
920 }
921
922 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
923 int logical_port)
924 {
925 int i;
926
927 for (i = 0; i < EHEA_MAX_PORTS; i++)
928 if (adapter->port[i])
929 if (adapter->port[i]->logical_port_id == logical_port)
930 return adapter->port[i];
931 return NULL;
932 }
933
934 int ehea_sense_port_attr(struct ehea_port *port)
935 {
936 int ret;
937 u64 hret;
938 struct hcp_ehea_port_cb0 *cb0;
939
940 /* may be called via ehea_neq_tasklet() */
941 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
942 if (!cb0) {
943 ehea_error("no mem for cb0");
944 ret = -ENOMEM;
945 goto out;
946 }
947
948 hret = ehea_h_query_ehea_port(port->adapter->handle,
949 port->logical_port_id, H_PORT_CB0,
950 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
951 cb0);
952 if (hret != H_SUCCESS) {
953 ret = -EIO;
954 goto out_free;
955 }
956
957 /* MAC address */
958 port->mac_addr = cb0->port_mac_addr << 16;
959
960 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
961 ret = -EADDRNOTAVAIL;
962 goto out_free;
963 }
964
965 /* Port speed */
966 switch (cb0->port_speed) {
967 case H_SPEED_10M_H:
968 port->port_speed = EHEA_SPEED_10M;
969 port->full_duplex = 0;
970 break;
971 case H_SPEED_10M_F:
972 port->port_speed = EHEA_SPEED_10M;
973 port->full_duplex = 1;
974 break;
975 case H_SPEED_100M_H:
976 port->port_speed = EHEA_SPEED_100M;
977 port->full_duplex = 0;
978 break;
979 case H_SPEED_100M_F:
980 port->port_speed = EHEA_SPEED_100M;
981 port->full_duplex = 1;
982 break;
983 case H_SPEED_1G_F:
984 port->port_speed = EHEA_SPEED_1G;
985 port->full_duplex = 1;
986 break;
987 case H_SPEED_10G_F:
988 port->port_speed = EHEA_SPEED_10G;
989 port->full_duplex = 1;
990 break;
991 default:
992 port->port_speed = 0;
993 port->full_duplex = 0;
994 break;
995 }
996
997 port->autoneg = 1;
998 port->num_mcs = cb0->num_default_qps;
999
1000 /* Number of default QPs */
1001 if (use_mcs)
1002 port->num_def_qps = cb0->num_default_qps;
1003 else
1004 port->num_def_qps = 1;
1005
1006 if (!port->num_def_qps) {
1007 ret = -EINVAL;
1008 goto out_free;
1009 }
1010
1011 port->num_tx_qps = num_tx_qps;
1012
1013 if (port->num_def_qps >= port->num_tx_qps)
1014 port->num_add_tx_qps = 0;
1015 else
1016 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1017
1018 ret = 0;
1019 out_free:
1020 if (ret || netif_msg_probe(port))
1021 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1022 free_page((unsigned long)cb0);
1023 out:
1024 return ret;
1025 }
1026
1027 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1028 {
1029 struct hcp_ehea_port_cb4 *cb4;
1030 u64 hret;
1031 int ret = 0;
1032
1033 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1034 if (!cb4) {
1035 ehea_error("no mem for cb4");
1036 ret = -ENOMEM;
1037 goto out;
1038 }
1039
1040 cb4->port_speed = port_speed;
1041
1042 netif_carrier_off(port->netdev);
1043
1044 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1045 port->logical_port_id,
1046 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1047 if (hret == H_SUCCESS) {
1048 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1049
1050 hret = ehea_h_query_ehea_port(port->adapter->handle,
1051 port->logical_port_id,
1052 H_PORT_CB4, H_PORT_CB4_SPEED,
1053 cb4);
1054 if (hret == H_SUCCESS) {
1055 switch (cb4->port_speed) {
1056 case H_SPEED_10M_H:
1057 port->port_speed = EHEA_SPEED_10M;
1058 port->full_duplex = 0;
1059 break;
1060 case H_SPEED_10M_F:
1061 port->port_speed = EHEA_SPEED_10M;
1062 port->full_duplex = 1;
1063 break;
1064 case H_SPEED_100M_H:
1065 port->port_speed = EHEA_SPEED_100M;
1066 port->full_duplex = 0;
1067 break;
1068 case H_SPEED_100M_F:
1069 port->port_speed = EHEA_SPEED_100M;
1070 port->full_duplex = 1;
1071 break;
1072 case H_SPEED_1G_F:
1073 port->port_speed = EHEA_SPEED_1G;
1074 port->full_duplex = 1;
1075 break;
1076 case H_SPEED_10G_F:
1077 port->port_speed = EHEA_SPEED_10G;
1078 port->full_duplex = 1;
1079 break;
1080 default:
1081 port->port_speed = 0;
1082 port->full_duplex = 0;
1083 break;
1084 }
1085 } else {
1086 ehea_error("Failed sensing port speed");
1087 ret = -EIO;
1088 }
1089 } else {
1090 if (hret == H_AUTHORITY) {
1091 ehea_info("Hypervisor denied setting port speed");
1092 ret = -EPERM;
1093 } else {
1094 ret = -EIO;
1095 ehea_error("Failed setting port speed");
1096 }
1097 }
1098 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1099 netif_carrier_on(port->netdev);
1100
1101 free_page((unsigned long)cb4);
1102 out:
1103 return ret;
1104 }
1105
1106 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1107 {
1108 int ret;
1109 u8 ec;
1110 u8 portnum;
1111 struct ehea_port *port;
1112
1113 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1114 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1115 port = ehea_get_port(adapter, portnum);
1116
1117 switch (ec) {
1118 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1119
1120 if (!port) {
1121 ehea_error("unknown portnum %x", portnum);
1122 break;
1123 }
1124
1125 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1126 if (!netif_carrier_ok(port->netdev)) {
1127 ret = ehea_sense_port_attr(port);
1128 if (ret) {
1129 ehea_error("failed resensing port "
1130 "attributes");
1131 break;
1132 }
1133
1134 if (netif_msg_link(port))
1135 ehea_info("%s: Logical port up: %dMbps "
1136 "%s Duplex",
1137 port->netdev->name,
1138 port->port_speed,
1139 port->full_duplex ==
1140 1 ? "Full" : "Half");
1141
1142 netif_carrier_on(port->netdev);
1143 netif_wake_queue(port->netdev);
1144 }
1145 } else
1146 if (netif_carrier_ok(port->netdev)) {
1147 if (netif_msg_link(port))
1148 ehea_info("%s: Logical port down",
1149 port->netdev->name);
1150 netif_carrier_off(port->netdev);
1151 netif_stop_queue(port->netdev);
1152 }
1153
1154 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1155 port->phy_link = EHEA_PHY_LINK_UP;
1156 if (netif_msg_link(port))
1157 ehea_info("%s: Physical port up",
1158 port->netdev->name);
1159 if (prop_carrier_state)
1160 netif_carrier_on(port->netdev);
1161 } else {
1162 port->phy_link = EHEA_PHY_LINK_DOWN;
1163 if (netif_msg_link(port))
1164 ehea_info("%s: Physical port down",
1165 port->netdev->name);
1166 if (prop_carrier_state)
1167 netif_carrier_off(port->netdev);
1168 }
1169
1170 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1171 ehea_info("External switch port is primary port");
1172 else
1173 ehea_info("External switch port is backup port");
1174
1175 break;
1176 case EHEA_EC_ADAPTER_MALFUNC:
1177 ehea_error("Adapter malfunction");
1178 break;
1179 case EHEA_EC_PORT_MALFUNC:
1180 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1181 netif_carrier_off(port->netdev);
1182 netif_stop_queue(port->netdev);
1183 break;
1184 default:
1185 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1186 break;
1187 }
1188 }
1189
1190 static void ehea_neq_tasklet(unsigned long data)
1191 {
1192 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1193 struct ehea_eqe *eqe;
1194 u64 event_mask;
1195
1196 eqe = ehea_poll_eq(adapter->neq);
1197 ehea_debug("eqe=%p", eqe);
1198
1199 while (eqe) {
1200 ehea_debug("*eqe=%lx", eqe->entry);
1201 ehea_parse_eqe(adapter, eqe->entry);
1202 eqe = ehea_poll_eq(adapter->neq);
1203 ehea_debug("next eqe=%p", eqe);
1204 }
1205
1206 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1207 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1208 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1209
1210 ehea_h_reset_events(adapter->handle,
1211 adapter->neq->fw_handle, event_mask);
1212 }
1213
1214 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1215 {
1216 struct ehea_adapter *adapter = param;
1217 tasklet_hi_schedule(&adapter->neq_tasklet);
1218 return IRQ_HANDLED;
1219 }
1220
1221
1222 static int ehea_fill_port_res(struct ehea_port_res *pr)
1223 {
1224 int ret;
1225 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1226
1227 ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1228 - init_attr->act_nr_rwqes_rq2
1229 - init_attr->act_nr_rwqes_rq3 - 1);
1230
1231 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1232
1233 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1234
1235 return ret;
1236 }
1237
1238 static int ehea_reg_interrupts(struct net_device *dev)
1239 {
1240 struct ehea_port *port = netdev_priv(dev);
1241 struct ehea_port_res *pr;
1242 int i, ret;
1243
1244
1245 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1246 dev->name);
1247
1248 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1249 ehea_qp_aff_irq_handler,
1250 IRQF_DISABLED, port->int_aff_name, port);
1251 if (ret) {
1252 ehea_error("failed registering irq for qp_aff_irq_handler:"
1253 "ist=%X", port->qp_eq->attr.ist1);
1254 goto out_free_qpeq;
1255 }
1256
1257 if (netif_msg_ifup(port))
1258 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1259 "registered", port->qp_eq->attr.ist1);
1260
1261
1262 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1263 pr = &port->port_res[i];
1264 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1265 "%s-queue%d", dev->name, i);
1266 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1267 ehea_recv_irq_handler,
1268 IRQF_DISABLED, pr->int_send_name,
1269 pr);
1270 if (ret) {
1271 ehea_error("failed registering irq for ehea_queue "
1272 "port_res_nr:%d, ist=%X", i,
1273 pr->eq->attr.ist1);
1274 goto out_free_req;
1275 }
1276 if (netif_msg_ifup(port))
1277 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1278 "%d registered", pr->eq->attr.ist1, i);
1279 }
1280 out:
1281 return ret;
1282
1283
1284 out_free_req:
1285 while (--i >= 0) {
1286 u32 ist = port->port_res[i].eq->attr.ist1;
1287 ibmebus_free_irq(ist, &port->port_res[i]);
1288 }
1289
1290 out_free_qpeq:
1291 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1292 i = port->num_def_qps;
1293
1294 goto out;
1295
1296 }
1297
1298 static void ehea_free_interrupts(struct net_device *dev)
1299 {
1300 struct ehea_port *port = netdev_priv(dev);
1301 struct ehea_port_res *pr;
1302 int i;
1303
1304 /* send */
1305
1306 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1307 pr = &port->port_res[i];
1308 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1309 if (netif_msg_intr(port))
1310 ehea_info("free send irq for res %d with handle 0x%X",
1311 i, pr->eq->attr.ist1);
1312 }
1313
1314 /* associated events */
1315 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1316 if (netif_msg_intr(port))
1317 ehea_info("associated event interrupt for handle 0x%X freed",
1318 port->qp_eq->attr.ist1);
1319 }
1320
1321 static int ehea_configure_port(struct ehea_port *port)
1322 {
1323 int ret, i;
1324 u64 hret, mask;
1325 struct hcp_ehea_port_cb0 *cb0;
1326
1327 ret = -ENOMEM;
1328 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1329 if (!cb0)
1330 goto out;
1331
1332 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1333 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1334 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1335 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1336 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1337 PXLY_RC_VLAN_FILTER)
1338 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1339
1340 for (i = 0; i < port->num_mcs; i++)
1341 if (use_mcs)
1342 cb0->default_qpn_arr[i] =
1343 port->port_res[i].qp->init_attr.qp_nr;
1344 else
1345 cb0->default_qpn_arr[i] =
1346 port->port_res[0].qp->init_attr.qp_nr;
1347
1348 if (netif_msg_ifup(port))
1349 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1350
1351 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1352 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1353
1354 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1355 port->logical_port_id,
1356 H_PORT_CB0, mask, cb0);
1357 ret = -EIO;
1358 if (hret != H_SUCCESS)
1359 goto out_free;
1360
1361 ret = 0;
1362
1363 out_free:
1364 free_page((unsigned long)cb0);
1365 out:
1366 return ret;
1367 }
1368
1369 int ehea_gen_smrs(struct ehea_port_res *pr)
1370 {
1371 int ret;
1372 struct ehea_adapter *adapter = pr->port->adapter;
1373
1374 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1375 if (ret)
1376 goto out;
1377
1378 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1379 if (ret)
1380 goto out_free;
1381
1382 return 0;
1383
1384 out_free:
1385 ehea_rem_mr(&pr->send_mr);
1386 out:
1387 ehea_error("Generating SMRS failed\n");
1388 return -EIO;
1389 }
1390
1391 int ehea_rem_smrs(struct ehea_port_res *pr)
1392 {
1393 if ((ehea_rem_mr(&pr->send_mr)) ||
1394 (ehea_rem_mr(&pr->recv_mr)))
1395 return -EIO;
1396 else
1397 return 0;
1398 }
1399
1400 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1401 {
1402 int arr_size = sizeof(void *) * max_q_entries;
1403
1404 q_skba->arr = vmalloc(arr_size);
1405 if (!q_skba->arr)
1406 return -ENOMEM;
1407
1408 memset(q_skba->arr, 0, arr_size);
1409
1410 q_skba->len = max_q_entries;
1411 q_skba->index = 0;
1412 q_skba->os_skbs = 0;
1413
1414 return 0;
1415 }
1416
1417 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1418 struct port_res_cfg *pr_cfg, int queue_token)
1419 {
1420 struct ehea_adapter *adapter = port->adapter;
1421 enum ehea_eq_type eq_type = EHEA_EQ;
1422 struct ehea_qp_init_attr *init_attr = NULL;
1423 int ret = -EIO;
1424
1425 memset(pr, 0, sizeof(struct ehea_port_res));
1426
1427 pr->port = port;
1428 spin_lock_init(&pr->xmit_lock);
1429 spin_lock_init(&pr->netif_queue);
1430
1431 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1432 if (!pr->eq) {
1433 ehea_error("create_eq failed (eq)");
1434 goto out_free;
1435 }
1436
1437 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1438 pr->eq->fw_handle,
1439 port->logical_port_id);
1440 if (!pr->recv_cq) {
1441 ehea_error("create_cq failed (cq_recv)");
1442 goto out_free;
1443 }
1444
1445 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1446 pr->eq->fw_handle,
1447 port->logical_port_id);
1448 if (!pr->send_cq) {
1449 ehea_error("create_cq failed (cq_send)");
1450 goto out_free;
1451 }
1452
1453 if (netif_msg_ifup(port))
1454 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1455 pr->send_cq->attr.act_nr_of_cqes,
1456 pr->recv_cq->attr.act_nr_of_cqes);
1457
1458 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1459 if (!init_attr) {
1460 ret = -ENOMEM;
1461 ehea_error("no mem for ehea_qp_init_attr");
1462 goto out_free;
1463 }
1464
1465 init_attr->low_lat_rq1 = 1;
1466 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1467 init_attr->rq_count = 3;
1468 init_attr->qp_token = queue_token;
1469 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1470 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1471 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1472 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1473 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1474 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1475 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1476 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1477 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1478 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1479 init_attr->port_nr = port->logical_port_id;
1480 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1481 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1482 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1483
1484 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1485 if (!pr->qp) {
1486 ehea_error("create_qp failed");
1487 ret = -EIO;
1488 goto out_free;
1489 }
1490
1491 if (netif_msg_ifup(port))
1492 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1493 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1494 init_attr->act_nr_send_wqes,
1495 init_attr->act_nr_rwqes_rq1,
1496 init_attr->act_nr_rwqes_rq2,
1497 init_attr->act_nr_rwqes_rq3);
1498
1499 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1500
1501 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1502 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1503 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1504 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1505 if (ret)
1506 goto out_free;
1507
1508 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1509 if (ehea_gen_smrs(pr) != 0) {
1510 ret = -EIO;
1511 goto out_free;
1512 }
1513
1514 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1515
1516 kfree(init_attr);
1517
1518 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1519
1520 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1521 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1522 pr->lro_mgr.lro_arr = pr->lro_desc;
1523 pr->lro_mgr.get_skb_header = get_skb_hdr;
1524 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1525 pr->lro_mgr.dev = port->netdev;
1526 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1527 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1528
1529 ret = 0;
1530 goto out;
1531
1532 out_free:
1533 kfree(init_attr);
1534 vfree(pr->sq_skba.arr);
1535 vfree(pr->rq1_skba.arr);
1536 vfree(pr->rq2_skba.arr);
1537 vfree(pr->rq3_skba.arr);
1538 ehea_destroy_qp(pr->qp);
1539 ehea_destroy_cq(pr->send_cq);
1540 ehea_destroy_cq(pr->recv_cq);
1541 ehea_destroy_eq(pr->eq);
1542 out:
1543 return ret;
1544 }
1545
1546 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1547 {
1548 int ret, i;
1549
1550 if (pr->qp)
1551 netif_napi_del(&pr->napi);
1552
1553 ret = ehea_destroy_qp(pr->qp);
1554
1555 if (!ret) {
1556 ehea_destroy_cq(pr->send_cq);
1557 ehea_destroy_cq(pr->recv_cq);
1558 ehea_destroy_eq(pr->eq);
1559
1560 for (i = 0; i < pr->rq1_skba.len; i++)
1561 if (pr->rq1_skba.arr[i])
1562 dev_kfree_skb(pr->rq1_skba.arr[i]);
1563
1564 for (i = 0; i < pr->rq2_skba.len; i++)
1565 if (pr->rq2_skba.arr[i])
1566 dev_kfree_skb(pr->rq2_skba.arr[i]);
1567
1568 for (i = 0; i < pr->rq3_skba.len; i++)
1569 if (pr->rq3_skba.arr[i])
1570 dev_kfree_skb(pr->rq3_skba.arr[i]);
1571
1572 for (i = 0; i < pr->sq_skba.len; i++)
1573 if (pr->sq_skba.arr[i])
1574 dev_kfree_skb(pr->sq_skba.arr[i]);
1575
1576 vfree(pr->rq1_skba.arr);
1577 vfree(pr->rq2_skba.arr);
1578 vfree(pr->rq3_skba.arr);
1579 vfree(pr->sq_skba.arr);
1580 ret = ehea_rem_smrs(pr);
1581 }
1582 return ret;
1583 }
1584
1585 /*
1586 * The write_* functions store information in swqe which is used by
1587 * the hardware to calculate the ip/tcp/udp checksum
1588 */
1589
1590 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1591 const struct sk_buff *skb)
1592 {
1593 swqe->ip_start = skb_network_offset(skb);
1594 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1595 }
1596
1597 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1598 const struct sk_buff *skb)
1599 {
1600 swqe->tcp_offset =
1601 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1602
1603 swqe->tcp_end = (u16)skb->len - 1;
1604 }
1605
1606 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1607 const struct sk_buff *skb)
1608 {
1609 swqe->tcp_offset =
1610 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1611
1612 swqe->tcp_end = (u16)skb->len - 1;
1613 }
1614
1615
1616 static void write_swqe2_TSO(struct sk_buff *skb,
1617 struct ehea_swqe *swqe, u32 lkey)
1618 {
1619 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1620 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1621 int skb_data_size = skb->len - skb->data_len;
1622 int headersize;
1623
1624 /* Packet is TCP with TSO enabled */
1625 swqe->tx_control |= EHEA_SWQE_TSO;
1626 swqe->mss = skb_shinfo(skb)->gso_size;
1627 /* copy only eth/ip/tcp headers to immediate data and
1628 * the rest of skb->data to sg1entry
1629 */
1630 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1631
1632 skb_data_size = skb->len - skb->data_len;
1633
1634 if (skb_data_size >= headersize) {
1635 /* copy immediate data */
1636 skb_copy_from_linear_data(skb, imm_data, headersize);
1637 swqe->immediate_data_length = headersize;
1638
1639 if (skb_data_size > headersize) {
1640 /* set sg1entry data */
1641 sg1entry->l_key = lkey;
1642 sg1entry->len = skb_data_size - headersize;
1643 sg1entry->vaddr =
1644 ehea_map_vaddr(skb->data + headersize);
1645 swqe->descriptors++;
1646 }
1647 } else
1648 ehea_error("cannot handle fragmented headers");
1649 }
1650
1651 static void write_swqe2_nonTSO(struct sk_buff *skb,
1652 struct ehea_swqe *swqe, u32 lkey)
1653 {
1654 int skb_data_size = skb->len - skb->data_len;
1655 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1656 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1657
1658 /* Packet is any nonTSO type
1659 *
1660 * Copy as much as possible skb->data to immediate data and
1661 * the rest to sg1entry
1662 */
1663 if (skb_data_size >= SWQE2_MAX_IMM) {
1664 /* copy immediate data */
1665 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1666
1667 swqe->immediate_data_length = SWQE2_MAX_IMM;
1668
1669 if (skb_data_size > SWQE2_MAX_IMM) {
1670 /* copy sg1entry data */
1671 sg1entry->l_key = lkey;
1672 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1673 sg1entry->vaddr =
1674 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1675 swqe->descriptors++;
1676 }
1677 } else {
1678 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1679 swqe->immediate_data_length = skb_data_size;
1680 }
1681 }
1682
1683 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1684 struct ehea_swqe *swqe, u32 lkey)
1685 {
1686 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1687 skb_frag_t *frag;
1688 int nfrags, sg1entry_contains_frag_data, i;
1689
1690 nfrags = skb_shinfo(skb)->nr_frags;
1691 sg1entry = &swqe->u.immdata_desc.sg_entry;
1692 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1693 swqe->descriptors = 0;
1694 sg1entry_contains_frag_data = 0;
1695
1696 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1697 write_swqe2_TSO(skb, swqe, lkey);
1698 else
1699 write_swqe2_nonTSO(skb, swqe, lkey);
1700
1701 /* write descriptors */
1702 if (nfrags > 0) {
1703 if (swqe->descriptors == 0) {
1704 /* sg1entry not yet used */
1705 frag = &skb_shinfo(skb)->frags[0];
1706
1707 /* copy sg1entry data */
1708 sg1entry->l_key = lkey;
1709 sg1entry->len = frag->size;
1710 sg1entry->vaddr =
1711 ehea_map_vaddr(page_address(frag->page)
1712 + frag->page_offset);
1713 swqe->descriptors++;
1714 sg1entry_contains_frag_data = 1;
1715 }
1716
1717 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1718
1719 frag = &skb_shinfo(skb)->frags[i];
1720 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1721
1722 sgentry->l_key = lkey;
1723 sgentry->len = frag->size;
1724 sgentry->vaddr =
1725 ehea_map_vaddr(page_address(frag->page)
1726 + frag->page_offset);
1727 swqe->descriptors++;
1728 }
1729 }
1730 }
1731
1732 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1733 {
1734 int ret = 0;
1735 u64 hret;
1736 u8 reg_type;
1737
1738 /* De/Register untagged packets */
1739 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1740 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1741 port->logical_port_id,
1742 reg_type, port->mac_addr, 0, hcallid);
1743 if (hret != H_SUCCESS) {
1744 ehea_error("%sregistering bc address failed (tagged)",
1745 hcallid == H_REG_BCMC ? "" : "de");
1746 ret = -EIO;
1747 goto out_herr;
1748 }
1749
1750 /* De/Register VLAN packets */
1751 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1752 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1753 port->logical_port_id,
1754 reg_type, port->mac_addr, 0, hcallid);
1755 if (hret != H_SUCCESS) {
1756 ehea_error("%sregistering bc address failed (vlan)",
1757 hcallid == H_REG_BCMC ? "" : "de");
1758 ret = -EIO;
1759 }
1760 out_herr:
1761 return ret;
1762 }
1763
1764 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1765 {
1766 struct ehea_port *port = netdev_priv(dev);
1767 struct sockaddr *mac_addr = sa;
1768 struct hcp_ehea_port_cb0 *cb0;
1769 int ret;
1770 u64 hret;
1771
1772 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1773 ret = -EADDRNOTAVAIL;
1774 goto out;
1775 }
1776
1777 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1778 if (!cb0) {
1779 ehea_error("no mem for cb0");
1780 ret = -ENOMEM;
1781 goto out;
1782 }
1783
1784 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1785
1786 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1787
1788 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1789 port->logical_port_id, H_PORT_CB0,
1790 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1791 if (hret != H_SUCCESS) {
1792 ret = -EIO;
1793 goto out_free;
1794 }
1795
1796 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1797
1798 /* Deregister old MAC in pHYP */
1799 if (port->state == EHEA_PORT_UP) {
1800 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1801 if (ret)
1802 goto out_upregs;
1803 }
1804
1805 port->mac_addr = cb0->port_mac_addr << 16;
1806
1807 /* Register new MAC in pHYP */
1808 if (port->state == EHEA_PORT_UP) {
1809 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1810 if (ret)
1811 goto out_upregs;
1812 }
1813
1814 ret = 0;
1815
1816 out_upregs:
1817 ehea_update_bcmc_registrations();
1818 out_free:
1819 free_page((unsigned long)cb0);
1820 out:
1821 return ret;
1822 }
1823
1824 static void ehea_promiscuous_error(u64 hret, int enable)
1825 {
1826 if (hret == H_AUTHORITY)
1827 ehea_info("Hypervisor denied %sabling promiscuous mode",
1828 enable == 1 ? "en" : "dis");
1829 else
1830 ehea_error("failed %sabling promiscuous mode",
1831 enable == 1 ? "en" : "dis");
1832 }
1833
1834 static void ehea_promiscuous(struct net_device *dev, int enable)
1835 {
1836 struct ehea_port *port = netdev_priv(dev);
1837 struct hcp_ehea_port_cb7 *cb7;
1838 u64 hret;
1839
1840 if ((enable && port->promisc) || (!enable && !port->promisc))
1841 return;
1842
1843 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1844 if (!cb7) {
1845 ehea_error("no mem for cb7");
1846 goto out;
1847 }
1848
1849 /* Modify Pxs_DUCQPN in CB7 */
1850 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1851
1852 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1853 port->logical_port_id,
1854 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1855 if (hret) {
1856 ehea_promiscuous_error(hret, enable);
1857 goto out;
1858 }
1859
1860 port->promisc = enable;
1861 out:
1862 free_page((unsigned long)cb7);
1863 return;
1864 }
1865
1866 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1867 u32 hcallid)
1868 {
1869 u64 hret;
1870 u8 reg_type;
1871
1872 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1873 | EHEA_BCMC_UNTAGGED;
1874
1875 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1876 port->logical_port_id,
1877 reg_type, mc_mac_addr, 0, hcallid);
1878 if (hret)
1879 goto out;
1880
1881 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1882 | EHEA_BCMC_VLANID_ALL;
1883
1884 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1885 port->logical_port_id,
1886 reg_type, mc_mac_addr, 0, hcallid);
1887 out:
1888 return hret;
1889 }
1890
1891 static int ehea_drop_multicast_list(struct net_device *dev)
1892 {
1893 struct ehea_port *port = netdev_priv(dev);
1894 struct ehea_mc_list *mc_entry = port->mc_list;
1895 struct list_head *pos;
1896 struct list_head *temp;
1897 int ret = 0;
1898 u64 hret;
1899
1900 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1901 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1902
1903 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1904 H_DEREG_BCMC);
1905 if (hret) {
1906 ehea_error("failed deregistering mcast MAC");
1907 ret = -EIO;
1908 }
1909
1910 list_del(pos);
1911 kfree(mc_entry);
1912 }
1913 return ret;
1914 }
1915
1916 static void ehea_allmulti(struct net_device *dev, int enable)
1917 {
1918 struct ehea_port *port = netdev_priv(dev);
1919 u64 hret;
1920
1921 if (!port->allmulti) {
1922 if (enable) {
1923 /* Enable ALLMULTI */
1924 ehea_drop_multicast_list(dev);
1925 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1926 if (!hret)
1927 port->allmulti = 1;
1928 else
1929 ehea_error("failed enabling IFF_ALLMULTI");
1930 }
1931 } else
1932 if (!enable) {
1933 /* Disable ALLMULTI */
1934 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1935 if (!hret)
1936 port->allmulti = 0;
1937 else
1938 ehea_error("failed disabling IFF_ALLMULTI");
1939 }
1940 }
1941
1942 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1943 {
1944 struct ehea_mc_list *ehea_mcl_entry;
1945 u64 hret;
1946
1947 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1948 if (!ehea_mcl_entry) {
1949 ehea_error("no mem for mcl_entry");
1950 return;
1951 }
1952
1953 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1954
1955 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1956
1957 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1958 H_REG_BCMC);
1959 if (!hret)
1960 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1961 else {
1962 ehea_error("failed registering mcast MAC");
1963 kfree(ehea_mcl_entry);
1964 }
1965 }
1966
1967 static void ehea_set_multicast_list(struct net_device *dev)
1968 {
1969 struct ehea_port *port = netdev_priv(dev);
1970 struct dev_mc_list *k_mcl_entry;
1971 int ret;
1972
1973 if (dev->flags & IFF_PROMISC) {
1974 ehea_promiscuous(dev, 1);
1975 return;
1976 }
1977 ehea_promiscuous(dev, 0);
1978
1979 if (dev->flags & IFF_ALLMULTI) {
1980 ehea_allmulti(dev, 1);
1981 goto out;
1982 }
1983 ehea_allmulti(dev, 0);
1984
1985 if (!netdev_mc_empty(dev)) {
1986 ret = ehea_drop_multicast_list(dev);
1987 if (ret) {
1988 /* Dropping the current multicast list failed.
1989 * Enabling ALL_MULTI is the best we can do.
1990 */
1991 ehea_allmulti(dev, 1);
1992 }
1993
1994 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1995 ehea_info("Mcast registration limit reached (0x%llx). "
1996 "Use ALLMULTI!",
1997 port->adapter->max_mc_mac);
1998 goto out;
1999 }
2000
2001 netdev_for_each_mc_addr(k_mcl_entry, dev)
2002 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
2003
2004 }
2005 out:
2006 ehea_update_bcmc_registrations();
2007 return;
2008 }
2009
2010 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2011 {
2012 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2013 return -EINVAL;
2014 dev->mtu = new_mtu;
2015 return 0;
2016 }
2017
2018 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2019 struct ehea_swqe *swqe, u32 lkey)
2020 {
2021 if (skb->protocol == htons(ETH_P_IP)) {
2022 const struct iphdr *iph = ip_hdr(skb);
2023
2024 /* IPv4 */
2025 swqe->tx_control |= EHEA_SWQE_CRC
2026 | EHEA_SWQE_IP_CHECKSUM
2027 | EHEA_SWQE_TCP_CHECKSUM
2028 | EHEA_SWQE_IMM_DATA_PRESENT
2029 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2030
2031 write_ip_start_end(swqe, skb);
2032
2033 if (iph->protocol == IPPROTO_UDP) {
2034 if ((iph->frag_off & IP_MF) ||
2035 (iph->frag_off & IP_OFFSET))
2036 /* IP fragment, so don't change cs */
2037 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2038 else
2039 write_udp_offset_end(swqe, skb);
2040 } else if (iph->protocol == IPPROTO_TCP) {
2041 write_tcp_offset_end(swqe, skb);
2042 }
2043
2044 /* icmp (big data) and ip segmentation packets (all other ip
2045 packets) do not require any special handling */
2046
2047 } else {
2048 /* Other Ethernet Protocol */
2049 swqe->tx_control |= EHEA_SWQE_CRC
2050 | EHEA_SWQE_IMM_DATA_PRESENT
2051 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2052 }
2053
2054 write_swqe2_data(skb, dev, swqe, lkey);
2055 }
2056
2057 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2058 struct ehea_swqe *swqe)
2059 {
2060 int nfrags = skb_shinfo(skb)->nr_frags;
2061 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2062 skb_frag_t *frag;
2063 int i;
2064
2065 if (skb->protocol == htons(ETH_P_IP)) {
2066 const struct iphdr *iph = ip_hdr(skb);
2067
2068 /* IPv4 */
2069 write_ip_start_end(swqe, skb);
2070
2071 if (iph->protocol == IPPROTO_TCP) {
2072 swqe->tx_control |= EHEA_SWQE_CRC
2073 | EHEA_SWQE_IP_CHECKSUM
2074 | EHEA_SWQE_TCP_CHECKSUM
2075 | EHEA_SWQE_IMM_DATA_PRESENT;
2076
2077 write_tcp_offset_end(swqe, skb);
2078
2079 } else if (iph->protocol == IPPROTO_UDP) {
2080 if ((iph->frag_off & IP_MF) ||
2081 (iph->frag_off & IP_OFFSET))
2082 /* IP fragment, so don't change cs */
2083 swqe->tx_control |= EHEA_SWQE_CRC
2084 | EHEA_SWQE_IMM_DATA_PRESENT;
2085 else {
2086 swqe->tx_control |= EHEA_SWQE_CRC
2087 | EHEA_SWQE_IP_CHECKSUM
2088 | EHEA_SWQE_TCP_CHECKSUM
2089 | EHEA_SWQE_IMM_DATA_PRESENT;
2090
2091 write_udp_offset_end(swqe, skb);
2092 }
2093 } else {
2094 /* icmp (big data) and
2095 ip segmentation packets (all other ip packets) */
2096 swqe->tx_control |= EHEA_SWQE_CRC
2097 | EHEA_SWQE_IP_CHECKSUM
2098 | EHEA_SWQE_IMM_DATA_PRESENT;
2099 }
2100 } else {
2101 /* Other Ethernet Protocol */
2102 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2103 }
2104 /* copy (immediate) data */
2105 if (nfrags == 0) {
2106 /* data is in a single piece */
2107 skb_copy_from_linear_data(skb, imm_data, skb->len);
2108 } else {
2109 /* first copy data from the skb->data buffer ... */
2110 skb_copy_from_linear_data(skb, imm_data,
2111 skb->len - skb->data_len);
2112 imm_data += skb->len - skb->data_len;
2113
2114 /* ... then copy data from the fragments */
2115 for (i = 0; i < nfrags; i++) {
2116 frag = &skb_shinfo(skb)->frags[i];
2117 memcpy(imm_data,
2118 page_address(frag->page) + frag->page_offset,
2119 frag->size);
2120 imm_data += frag->size;
2121 }
2122 }
2123 swqe->immediate_data_length = skb->len;
2124 dev_kfree_skb(skb);
2125 }
2126
2127 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2128 {
2129 struct tcphdr *tcp;
2130 u32 tmp;
2131
2132 if ((skb->protocol == htons(ETH_P_IP)) &&
2133 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2134 tcp = (struct tcphdr *)(skb_network_header(skb) +
2135 (ip_hdr(skb)->ihl * 4));
2136 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2137 tmp += ip_hdr(skb)->daddr % 31;
2138 return tmp % num_qps;
2139 } else
2140 return 0;
2141 }
2142
2143 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2144 {
2145 struct ehea_port *port = netdev_priv(dev);
2146 struct ehea_swqe *swqe;
2147 unsigned long flags;
2148 u32 lkey;
2149 int swqe_index;
2150 struct ehea_port_res *pr;
2151
2152 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2153
2154 if (!spin_trylock(&pr->xmit_lock))
2155 return NETDEV_TX_BUSY;
2156
2157 if (pr->queue_stopped) {
2158 spin_unlock(&pr->xmit_lock);
2159 return NETDEV_TX_BUSY;
2160 }
2161
2162 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2163 memset(swqe, 0, SWQE_HEADER_SIZE);
2164 atomic_dec(&pr->swqe_avail);
2165
2166 if (skb->len <= SWQE3_MAX_IMM) {
2167 u32 sig_iv = port->sig_comp_iv;
2168 u32 swqe_num = pr->swqe_id_counter;
2169 ehea_xmit3(skb, dev, swqe);
2170 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2171 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2172 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2173 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2174 sig_iv);
2175 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2176 pr->swqe_ll_count = 0;
2177 } else
2178 pr->swqe_ll_count += 1;
2179 } else {
2180 swqe->wr_id =
2181 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2182 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2183 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2184 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2185 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2186
2187 pr->sq_skba.index++;
2188 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2189
2190 lkey = pr->send_mr.lkey;
2191 ehea_xmit2(skb, dev, swqe, lkey);
2192 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2193 }
2194 pr->swqe_id_counter += 1;
2195
2196 if (port->vgrp && vlan_tx_tag_present(skb)) {
2197 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2198 swqe->vlan_tag = vlan_tx_tag_get(skb);
2199 }
2200
2201 if (netif_msg_tx_queued(port)) {
2202 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2203 ehea_dump(swqe, 512, "swqe");
2204 }
2205
2206 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2207 netif_stop_queue(dev);
2208 swqe->tx_control |= EHEA_SWQE_PURGE;
2209 }
2210
2211 ehea_post_swqe(pr->qp, swqe);
2212 pr->tx_packets++;
2213
2214 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2215 spin_lock_irqsave(&pr->netif_queue, flags);
2216 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2217 pr->p_stats.queue_stopped++;
2218 netif_stop_queue(dev);
2219 pr->queue_stopped = 1;
2220 }
2221 spin_unlock_irqrestore(&pr->netif_queue, flags);
2222 }
2223 dev->trans_start = jiffies;
2224 spin_unlock(&pr->xmit_lock);
2225
2226 return NETDEV_TX_OK;
2227 }
2228
2229 static void ehea_vlan_rx_register(struct net_device *dev,
2230 struct vlan_group *grp)
2231 {
2232 struct ehea_port *port = netdev_priv(dev);
2233 struct ehea_adapter *adapter = port->adapter;
2234 struct hcp_ehea_port_cb1 *cb1;
2235 u64 hret;
2236
2237 port->vgrp = grp;
2238
2239 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2240 if (!cb1) {
2241 ehea_error("no mem for cb1");
2242 goto out;
2243 }
2244
2245 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2246 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2247 if (hret != H_SUCCESS)
2248 ehea_error("modify_ehea_port failed");
2249
2250 free_page((unsigned long)cb1);
2251 out:
2252 return;
2253 }
2254
2255 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2256 {
2257 struct ehea_port *port = netdev_priv(dev);
2258 struct ehea_adapter *adapter = port->adapter;
2259 struct hcp_ehea_port_cb1 *cb1;
2260 int index;
2261 u64 hret;
2262
2263 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2264 if (!cb1) {
2265 ehea_error("no mem for cb1");
2266 goto out;
2267 }
2268
2269 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2270 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2271 if (hret != H_SUCCESS) {
2272 ehea_error("query_ehea_port failed");
2273 goto out;
2274 }
2275
2276 index = (vid / 64);
2277 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2278
2279 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2280 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2281 if (hret != H_SUCCESS)
2282 ehea_error("modify_ehea_port failed");
2283 out:
2284 free_page((unsigned long)cb1);
2285 return;
2286 }
2287
2288 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2289 {
2290 struct ehea_port *port = netdev_priv(dev);
2291 struct ehea_adapter *adapter = port->adapter;
2292 struct hcp_ehea_port_cb1 *cb1;
2293 int index;
2294 u64 hret;
2295
2296 vlan_group_set_device(port->vgrp, vid, NULL);
2297
2298 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2299 if (!cb1) {
2300 ehea_error("no mem for cb1");
2301 goto out;
2302 }
2303
2304 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2305 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2306 if (hret != H_SUCCESS) {
2307 ehea_error("query_ehea_port failed");
2308 goto out;
2309 }
2310
2311 index = (vid / 64);
2312 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2313
2314 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2315 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2316 if (hret != H_SUCCESS)
2317 ehea_error("modify_ehea_port failed");
2318 out:
2319 free_page((unsigned long)cb1);
2320 return;
2321 }
2322
2323 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2324 {
2325 int ret = -EIO;
2326 u64 hret;
2327 u16 dummy16 = 0;
2328 u64 dummy64 = 0;
2329 struct hcp_modify_qp_cb0 *cb0;
2330
2331 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2332 if (!cb0) {
2333 ret = -ENOMEM;
2334 goto out;
2335 }
2336
2337 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2338 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2339 if (hret != H_SUCCESS) {
2340 ehea_error("query_ehea_qp failed (1)");
2341 goto out;
2342 }
2343
2344 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2345 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2346 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2347 &dummy64, &dummy64, &dummy16, &dummy16);
2348 if (hret != H_SUCCESS) {
2349 ehea_error("modify_ehea_qp failed (1)");
2350 goto out;
2351 }
2352
2353 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2354 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2355 if (hret != H_SUCCESS) {
2356 ehea_error("query_ehea_qp failed (2)");
2357 goto out;
2358 }
2359
2360 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2361 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2362 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2363 &dummy64, &dummy64, &dummy16, &dummy16);
2364 if (hret != H_SUCCESS) {
2365 ehea_error("modify_ehea_qp failed (2)");
2366 goto out;
2367 }
2368
2369 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2370 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2371 if (hret != H_SUCCESS) {
2372 ehea_error("query_ehea_qp failed (3)");
2373 goto out;
2374 }
2375
2376 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2377 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2378 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2379 &dummy64, &dummy64, &dummy16, &dummy16);
2380 if (hret != H_SUCCESS) {
2381 ehea_error("modify_ehea_qp failed (3)");
2382 goto out;
2383 }
2384
2385 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2386 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2387 if (hret != H_SUCCESS) {
2388 ehea_error("query_ehea_qp failed (4)");
2389 goto out;
2390 }
2391
2392 ret = 0;
2393 out:
2394 free_page((unsigned long)cb0);
2395 return ret;
2396 }
2397
2398 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2399 int add_tx_qps)
2400 {
2401 int ret, i;
2402 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2403 enum ehea_eq_type eq_type = EHEA_EQ;
2404
2405 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2406 EHEA_MAX_ENTRIES_EQ, 1);
2407 if (!port->qp_eq) {
2408 ret = -EINVAL;
2409 ehea_error("ehea_create_eq failed (qp_eq)");
2410 goto out_kill_eq;
2411 }
2412
2413 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2414 pr_cfg.max_entries_scq = sq_entries * 2;
2415 pr_cfg.max_entries_sq = sq_entries;
2416 pr_cfg.max_entries_rq1 = rq1_entries;
2417 pr_cfg.max_entries_rq2 = rq2_entries;
2418 pr_cfg.max_entries_rq3 = rq3_entries;
2419
2420 pr_cfg_small_rx.max_entries_rcq = 1;
2421 pr_cfg_small_rx.max_entries_scq = sq_entries;
2422 pr_cfg_small_rx.max_entries_sq = sq_entries;
2423 pr_cfg_small_rx.max_entries_rq1 = 1;
2424 pr_cfg_small_rx.max_entries_rq2 = 1;
2425 pr_cfg_small_rx.max_entries_rq3 = 1;
2426
2427 for (i = 0; i < def_qps; i++) {
2428 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2429 if (ret)
2430 goto out_clean_pr;
2431 }
2432 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2433 ret = ehea_init_port_res(port, &port->port_res[i],
2434 &pr_cfg_small_rx, i);
2435 if (ret)
2436 goto out_clean_pr;
2437 }
2438
2439 return 0;
2440
2441 out_clean_pr:
2442 while (--i >= 0)
2443 ehea_clean_portres(port, &port->port_res[i]);
2444
2445 out_kill_eq:
2446 ehea_destroy_eq(port->qp_eq);
2447 return ret;
2448 }
2449
2450 static int ehea_clean_all_portres(struct ehea_port *port)
2451 {
2452 int ret = 0;
2453 int i;
2454
2455 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2456 ret |= ehea_clean_portres(port, &port->port_res[i]);
2457
2458 ret |= ehea_destroy_eq(port->qp_eq);
2459
2460 return ret;
2461 }
2462
2463 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2464 {
2465 if (adapter->active_ports)
2466 return;
2467
2468 ehea_rem_mr(&adapter->mr);
2469 }
2470
2471 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2472 {
2473 if (adapter->active_ports)
2474 return 0;
2475
2476 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2477 }
2478
2479 static int ehea_up(struct net_device *dev)
2480 {
2481 int ret, i;
2482 struct ehea_port *port = netdev_priv(dev);
2483
2484 if (port->state == EHEA_PORT_UP)
2485 return 0;
2486
2487 ret = ehea_port_res_setup(port, port->num_def_qps,
2488 port->num_add_tx_qps);
2489 if (ret) {
2490 ehea_error("port_res_failed");
2491 goto out;
2492 }
2493
2494 /* Set default QP for this port */
2495 ret = ehea_configure_port(port);
2496 if (ret) {
2497 ehea_error("ehea_configure_port failed. ret:%d", ret);
2498 goto out_clean_pr;
2499 }
2500
2501 ret = ehea_reg_interrupts(dev);
2502 if (ret) {
2503 ehea_error("reg_interrupts failed. ret:%d", ret);
2504 goto out_clean_pr;
2505 }
2506
2507 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2508 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2509 if (ret) {
2510 ehea_error("activate_qp failed");
2511 goto out_free_irqs;
2512 }
2513 }
2514
2515 for (i = 0; i < port->num_def_qps; i++) {
2516 ret = ehea_fill_port_res(&port->port_res[i]);
2517 if (ret) {
2518 ehea_error("out_free_irqs");
2519 goto out_free_irqs;
2520 }
2521 }
2522
2523 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2524 if (ret) {
2525 ret = -EIO;
2526 goto out_free_irqs;
2527 }
2528
2529 port->state = EHEA_PORT_UP;
2530
2531 ret = 0;
2532 goto out;
2533
2534 out_free_irqs:
2535 ehea_free_interrupts(dev);
2536
2537 out_clean_pr:
2538 ehea_clean_all_portres(port);
2539 out:
2540 if (ret)
2541 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2542
2543 ehea_update_bcmc_registrations();
2544 ehea_update_firmware_handles();
2545
2546 return ret;
2547 }
2548
2549 static void port_napi_disable(struct ehea_port *port)
2550 {
2551 int i;
2552
2553 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2554 napi_disable(&port->port_res[i].napi);
2555 }
2556
2557 static void port_napi_enable(struct ehea_port *port)
2558 {
2559 int i;
2560
2561 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2562 napi_enable(&port->port_res[i].napi);
2563 }
2564
2565 static int ehea_open(struct net_device *dev)
2566 {
2567 int ret;
2568 struct ehea_port *port = netdev_priv(dev);
2569
2570 mutex_lock(&port->port_lock);
2571
2572 if (netif_msg_ifup(port))
2573 ehea_info("enabling port %s", dev->name);
2574
2575 ret = ehea_up(dev);
2576 if (!ret) {
2577 port_napi_enable(port);
2578 netif_start_queue(dev);
2579 }
2580
2581 mutex_unlock(&port->port_lock);
2582
2583 return ret;
2584 }
2585
2586 static int ehea_down(struct net_device *dev)
2587 {
2588 int ret;
2589 struct ehea_port *port = netdev_priv(dev);
2590
2591 if (port->state == EHEA_PORT_DOWN)
2592 return 0;
2593
2594 ehea_drop_multicast_list(dev);
2595 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2596
2597 ehea_free_interrupts(dev);
2598
2599 port->state = EHEA_PORT_DOWN;
2600
2601 ehea_update_bcmc_registrations();
2602
2603 ret = ehea_clean_all_portres(port);
2604 if (ret)
2605 ehea_info("Failed freeing resources for %s. ret=%i",
2606 dev->name, ret);
2607
2608 ehea_update_firmware_handles();
2609
2610 return ret;
2611 }
2612
2613 static int ehea_stop(struct net_device *dev)
2614 {
2615 int ret;
2616 struct ehea_port *port = netdev_priv(dev);
2617
2618 if (netif_msg_ifdown(port))
2619 ehea_info("disabling port %s", dev->name);
2620
2621 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2622 cancel_work_sync(&port->reset_task);
2623 mutex_lock(&port->port_lock);
2624 netif_stop_queue(dev);
2625 port_napi_disable(port);
2626 ret = ehea_down(dev);
2627 mutex_unlock(&port->port_lock);
2628 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2629 return ret;
2630 }
2631
2632 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2633 {
2634 struct ehea_qp qp = *orig_qp;
2635 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2636 struct ehea_swqe *swqe;
2637 int wqe_index;
2638 int i;
2639
2640 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2641 swqe = ehea_get_swqe(&qp, &wqe_index);
2642 swqe->tx_control |= EHEA_SWQE_PURGE;
2643 }
2644 }
2645
2646 static void ehea_flush_sq(struct ehea_port *port)
2647 {
2648 int i;
2649
2650 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2651 struct ehea_port_res *pr = &port->port_res[i];
2652 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2653 int k = 0;
2654 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2655 msleep(5);
2656 if (++k == 20)
2657 break;
2658 }
2659 }
2660 }
2661
2662 int ehea_stop_qps(struct net_device *dev)
2663 {
2664 struct ehea_port *port = netdev_priv(dev);
2665 struct ehea_adapter *adapter = port->adapter;
2666 struct hcp_modify_qp_cb0 *cb0;
2667 int ret = -EIO;
2668 int dret;
2669 int i;
2670 u64 hret;
2671 u64 dummy64 = 0;
2672 u16 dummy16 = 0;
2673
2674 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2675 if (!cb0) {
2676 ret = -ENOMEM;
2677 goto out;
2678 }
2679
2680 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2681 struct ehea_port_res *pr = &port->port_res[i];
2682 struct ehea_qp *qp = pr->qp;
2683
2684 /* Purge send queue */
2685 ehea_purge_sq(qp);
2686
2687 /* Disable queue pair */
2688 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2689 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2690 cb0);
2691 if (hret != H_SUCCESS) {
2692 ehea_error("query_ehea_qp failed (1)");
2693 goto out;
2694 }
2695
2696 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2697 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2698
2699 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2700 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2701 1), cb0, &dummy64,
2702 &dummy64, &dummy16, &dummy16);
2703 if (hret != H_SUCCESS) {
2704 ehea_error("modify_ehea_qp failed (1)");
2705 goto out;
2706 }
2707
2708 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2709 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2710 cb0);
2711 if (hret != H_SUCCESS) {
2712 ehea_error("query_ehea_qp failed (2)");
2713 goto out;
2714 }
2715
2716 /* deregister shared memory regions */
2717 dret = ehea_rem_smrs(pr);
2718 if (dret) {
2719 ehea_error("unreg shared memory region failed");
2720 goto out;
2721 }
2722 }
2723
2724 ret = 0;
2725 out:
2726 free_page((unsigned long)cb0);
2727
2728 return ret;
2729 }
2730
2731 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2732 {
2733 struct ehea_qp qp = *orig_qp;
2734 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2735 struct ehea_rwqe *rwqe;
2736 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2737 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2738 struct sk_buff *skb;
2739 u32 lkey = pr->recv_mr.lkey;
2740
2741
2742 int i;
2743 int index;
2744
2745 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2746 rwqe = ehea_get_next_rwqe(&qp, 2);
2747 rwqe->sg_list[0].l_key = lkey;
2748 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2749 skb = skba_rq2[index];
2750 if (skb)
2751 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2752 }
2753
2754 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2755 rwqe = ehea_get_next_rwqe(&qp, 3);
2756 rwqe->sg_list[0].l_key = lkey;
2757 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2758 skb = skba_rq3[index];
2759 if (skb)
2760 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2761 }
2762 }
2763
2764 int ehea_restart_qps(struct net_device *dev)
2765 {
2766 struct ehea_port *port = netdev_priv(dev);
2767 struct ehea_adapter *adapter = port->adapter;
2768 int ret = 0;
2769 int i;
2770
2771 struct hcp_modify_qp_cb0 *cb0;
2772 u64 hret;
2773 u64 dummy64 = 0;
2774 u16 dummy16 = 0;
2775
2776 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2777 if (!cb0) {
2778 ret = -ENOMEM;
2779 goto out;
2780 }
2781
2782 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2783 struct ehea_port_res *pr = &port->port_res[i];
2784 struct ehea_qp *qp = pr->qp;
2785
2786 ret = ehea_gen_smrs(pr);
2787 if (ret) {
2788 ehea_error("creation of shared memory regions failed");
2789 goto out;
2790 }
2791
2792 ehea_update_rqs(qp, pr);
2793
2794 /* Enable queue pair */
2795 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2796 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2797 cb0);
2798 if (hret != H_SUCCESS) {
2799 ehea_error("query_ehea_qp failed (1)");
2800 goto out;
2801 }
2802
2803 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2804 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2805
2806 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2807 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2808 1), cb0, &dummy64,
2809 &dummy64, &dummy16, &dummy16);
2810 if (hret != H_SUCCESS) {
2811 ehea_error("modify_ehea_qp failed (1)");
2812 goto out;
2813 }
2814
2815 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2816 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2817 cb0);
2818 if (hret != H_SUCCESS) {
2819 ehea_error("query_ehea_qp failed (2)");
2820 goto out;
2821 }
2822
2823 /* refill entire queue */
2824 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2825 ehea_refill_rq2(pr, 0);
2826 ehea_refill_rq3(pr, 0);
2827 }
2828 out:
2829 free_page((unsigned long)cb0);
2830
2831 return ret;
2832 }
2833
2834 static void ehea_reset_port(struct work_struct *work)
2835 {
2836 int ret;
2837 struct ehea_port *port =
2838 container_of(work, struct ehea_port, reset_task);
2839 struct net_device *dev = port->netdev;
2840
2841 port->resets++;
2842 mutex_lock(&port->port_lock);
2843 netif_stop_queue(dev);
2844
2845 port_napi_disable(port);
2846
2847 ehea_down(dev);
2848
2849 ret = ehea_up(dev);
2850 if (ret)
2851 goto out;
2852
2853 ehea_set_multicast_list(dev);
2854
2855 if (netif_msg_timer(port))
2856 ehea_info("Device %s resetted successfully", dev->name);
2857
2858 port_napi_enable(port);
2859
2860 netif_wake_queue(dev);
2861 out:
2862 mutex_unlock(&port->port_lock);
2863 return;
2864 }
2865
2866 static void ehea_rereg_mrs(struct work_struct *work)
2867 {
2868 int ret, i;
2869 struct ehea_adapter *adapter;
2870
2871 mutex_lock(&dlpar_mem_lock);
2872 ehea_info("LPAR memory changed - re-initializing driver");
2873
2874 list_for_each_entry(adapter, &adapter_list, list)
2875 if (adapter->active_ports) {
2876 /* Shutdown all ports */
2877 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2878 struct ehea_port *port = adapter->port[i];
2879 struct net_device *dev;
2880
2881 if (!port)
2882 continue;
2883
2884 dev = port->netdev;
2885
2886 if (dev->flags & IFF_UP) {
2887 mutex_lock(&port->port_lock);
2888 netif_stop_queue(dev);
2889 ehea_flush_sq(port);
2890 ret = ehea_stop_qps(dev);
2891 if (ret) {
2892 mutex_unlock(&port->port_lock);
2893 goto out;
2894 }
2895 port_napi_disable(port);
2896 mutex_unlock(&port->port_lock);
2897 }
2898 }
2899
2900 /* Unregister old memory region */
2901 ret = ehea_rem_mr(&adapter->mr);
2902 if (ret) {
2903 ehea_error("unregister MR failed - driver"
2904 " inoperable!");
2905 goto out;
2906 }
2907 }
2908
2909 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2910
2911 list_for_each_entry(adapter, &adapter_list, list)
2912 if (adapter->active_ports) {
2913 /* Register new memory region */
2914 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2915 if (ret) {
2916 ehea_error("register MR failed - driver"
2917 " inoperable!");
2918 goto out;
2919 }
2920
2921 /* Restart all ports */
2922 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2923 struct ehea_port *port = adapter->port[i];
2924
2925 if (port) {
2926 struct net_device *dev = port->netdev;
2927
2928 if (dev->flags & IFF_UP) {
2929 mutex_lock(&port->port_lock);
2930 port_napi_enable(port);
2931 ret = ehea_restart_qps(dev);
2932 if (!ret)
2933 netif_wake_queue(dev);
2934 mutex_unlock(&port->port_lock);
2935 }
2936 }
2937 }
2938 }
2939 ehea_info("re-initializing driver complete");
2940 out:
2941 mutex_unlock(&dlpar_mem_lock);
2942 return;
2943 }
2944
2945 static void ehea_tx_watchdog(struct net_device *dev)
2946 {
2947 struct ehea_port *port = netdev_priv(dev);
2948
2949 if (netif_carrier_ok(dev) &&
2950 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2951 ehea_schedule_port_reset(port);
2952 }
2953
2954 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2955 {
2956 struct hcp_query_ehea *cb;
2957 u64 hret;
2958 int ret;
2959
2960 cb = (void *)get_zeroed_page(GFP_KERNEL);
2961 if (!cb) {
2962 ret = -ENOMEM;
2963 goto out;
2964 }
2965
2966 hret = ehea_h_query_ehea(adapter->handle, cb);
2967
2968 if (hret != H_SUCCESS) {
2969 ret = -EIO;
2970 goto out_herr;
2971 }
2972
2973 adapter->max_mc_mac = cb->max_mc_mac - 1;
2974 ret = 0;
2975
2976 out_herr:
2977 free_page((unsigned long)cb);
2978 out:
2979 return ret;
2980 }
2981
2982 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2983 {
2984 struct hcp_ehea_port_cb4 *cb4;
2985 u64 hret;
2986 int ret = 0;
2987
2988 *jumbo = 0;
2989
2990 /* (Try to) enable *jumbo frames */
2991 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2992 if (!cb4) {
2993 ehea_error("no mem for cb4");
2994 ret = -ENOMEM;
2995 goto out;
2996 } else {
2997 hret = ehea_h_query_ehea_port(port->adapter->handle,
2998 port->logical_port_id,
2999 H_PORT_CB4,
3000 H_PORT_CB4_JUMBO, cb4);
3001 if (hret == H_SUCCESS) {
3002 if (cb4->jumbo_frame)
3003 *jumbo = 1;
3004 else {
3005 cb4->jumbo_frame = 1;
3006 hret = ehea_h_modify_ehea_port(port->adapter->
3007 handle,
3008 port->
3009 logical_port_id,
3010 H_PORT_CB4,
3011 H_PORT_CB4_JUMBO,
3012 cb4);
3013 if (hret == H_SUCCESS)
3014 *jumbo = 1;
3015 }
3016 } else
3017 ret = -EINVAL;
3018
3019 free_page((unsigned long)cb4);
3020 }
3021 out:
3022 return ret;
3023 }
3024
3025 static ssize_t ehea_show_port_id(struct device *dev,
3026 struct device_attribute *attr, char *buf)
3027 {
3028 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3029 return sprintf(buf, "%d", port->logical_port_id);
3030 }
3031
3032 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3033 NULL);
3034
3035 static void __devinit logical_port_release(struct device *dev)
3036 {
3037 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3038 of_node_put(port->ofdev.node);
3039 }
3040
3041 static struct device *ehea_register_port(struct ehea_port *port,
3042 struct device_node *dn)
3043 {
3044 int ret;
3045
3046 port->ofdev.node = of_node_get(dn);
3047 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3048 port->ofdev.dev.bus = &ibmebus_bus_type;
3049
3050 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3051 port->ofdev.dev.release = logical_port_release;
3052
3053 ret = of_device_register(&port->ofdev);
3054 if (ret) {
3055 ehea_error("failed to register device. ret=%d", ret);
3056 goto out;
3057 }
3058
3059 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3060 if (ret) {
3061 ehea_error("failed to register attributes, ret=%d", ret);
3062 goto out_unreg_of_dev;
3063 }
3064
3065 return &port->ofdev.dev;
3066
3067 out_unreg_of_dev:
3068 of_device_unregister(&port->ofdev);
3069 out:
3070 return NULL;
3071 }
3072
3073 static void ehea_unregister_port(struct ehea_port *port)
3074 {
3075 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3076 of_device_unregister(&port->ofdev);
3077 }
3078
3079 static const struct net_device_ops ehea_netdev_ops = {
3080 .ndo_open = ehea_open,
3081 .ndo_stop = ehea_stop,
3082 .ndo_start_xmit = ehea_start_xmit,
3083 #ifdef CONFIG_NET_POLL_CONTROLLER
3084 .ndo_poll_controller = ehea_netpoll,
3085 #endif
3086 .ndo_get_stats = ehea_get_stats,
3087 .ndo_set_mac_address = ehea_set_mac_addr,
3088 .ndo_validate_addr = eth_validate_addr,
3089 .ndo_set_multicast_list = ehea_set_multicast_list,
3090 .ndo_change_mtu = ehea_change_mtu,
3091 .ndo_vlan_rx_register = ehea_vlan_rx_register,
3092 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
3093 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
3094 .ndo_tx_timeout = ehea_tx_watchdog,
3095 };
3096
3097 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3098 u32 logical_port_id,
3099 struct device_node *dn)
3100 {
3101 int ret;
3102 struct net_device *dev;
3103 struct ehea_port *port;
3104 struct device *port_dev;
3105 int jumbo;
3106
3107 /* allocate memory for the port structures */
3108 dev = alloc_etherdev(sizeof(struct ehea_port));
3109
3110 if (!dev) {
3111 ehea_error("no mem for net_device");
3112 ret = -ENOMEM;
3113 goto out_err;
3114 }
3115
3116 port = netdev_priv(dev);
3117
3118 mutex_init(&port->port_lock);
3119 port->state = EHEA_PORT_DOWN;
3120 port->sig_comp_iv = sq_entries / 10;
3121
3122 port->adapter = adapter;
3123 port->netdev = dev;
3124 port->logical_port_id = logical_port_id;
3125
3126 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3127
3128 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3129 if (!port->mc_list) {
3130 ret = -ENOMEM;
3131 goto out_free_ethdev;
3132 }
3133
3134 INIT_LIST_HEAD(&port->mc_list->list);
3135
3136 ret = ehea_sense_port_attr(port);
3137 if (ret)
3138 goto out_free_mc_list;
3139
3140 port_dev = ehea_register_port(port, dn);
3141 if (!port_dev)
3142 goto out_free_mc_list;
3143
3144 SET_NETDEV_DEV(dev, port_dev);
3145
3146 /* initialize net_device structure */
3147 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3148
3149 dev->netdev_ops = &ehea_netdev_ops;
3150 ehea_set_ethtool_ops(dev);
3151
3152 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3153 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3154 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3155 | NETIF_F_LLTX;
3156 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3157
3158 INIT_WORK(&port->reset_task, ehea_reset_port);
3159
3160 ret = register_netdev(dev);
3161 if (ret) {
3162 ehea_error("register_netdev failed. ret=%d", ret);
3163 goto out_unreg_port;
3164 }
3165
3166 port->lro_max_aggr = lro_max_aggr;
3167
3168 ret = ehea_get_jumboframe_status(port, &jumbo);
3169 if (ret)
3170 ehea_error("failed determining jumbo frame status for %s",
3171 port->netdev->name);
3172
3173 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3174 jumbo == 1 ? "en" : "dis");
3175
3176 adapter->active_ports++;
3177
3178 return port;
3179
3180 out_unreg_port:
3181 ehea_unregister_port(port);
3182
3183 out_free_mc_list:
3184 kfree(port->mc_list);
3185
3186 out_free_ethdev:
3187 free_netdev(dev);
3188
3189 out_err:
3190 ehea_error("setting up logical port with id=%d failed, ret=%d",
3191 logical_port_id, ret);
3192 return NULL;
3193 }
3194
3195 static void ehea_shutdown_single_port(struct ehea_port *port)
3196 {
3197 struct ehea_adapter *adapter = port->adapter;
3198 unregister_netdev(port->netdev);
3199 ehea_unregister_port(port);
3200 kfree(port->mc_list);
3201 free_netdev(port->netdev);
3202 adapter->active_ports--;
3203 }
3204
3205 static int ehea_setup_ports(struct ehea_adapter *adapter)
3206 {
3207 struct device_node *lhea_dn;
3208 struct device_node *eth_dn = NULL;
3209
3210 const u32 *dn_log_port_id;
3211 int i = 0;
3212
3213 lhea_dn = adapter->ofdev->node;
3214 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3215
3216 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3217 NULL);
3218 if (!dn_log_port_id) {
3219 ehea_error("bad device node: eth_dn name=%s",
3220 eth_dn->full_name);
3221 continue;
3222 }
3223
3224 if (ehea_add_adapter_mr(adapter)) {
3225 ehea_error("creating MR failed");
3226 of_node_put(eth_dn);
3227 return -EIO;
3228 }
3229
3230 adapter->port[i] = ehea_setup_single_port(adapter,
3231 *dn_log_port_id,
3232 eth_dn);
3233 if (adapter->port[i])
3234 ehea_info("%s -> logical port id #%d",
3235 adapter->port[i]->netdev->name,
3236 *dn_log_port_id);
3237 else
3238 ehea_remove_adapter_mr(adapter);
3239
3240 i++;
3241 };
3242 return 0;
3243 }
3244
3245 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3246 u32 logical_port_id)
3247 {
3248 struct device_node *lhea_dn;
3249 struct device_node *eth_dn = NULL;
3250 const u32 *dn_log_port_id;
3251
3252 lhea_dn = adapter->ofdev->node;
3253 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3254
3255 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3256 NULL);
3257 if (dn_log_port_id)
3258 if (*dn_log_port_id == logical_port_id)
3259 return eth_dn;
3260 };
3261
3262 return NULL;
3263 }
3264
3265 static ssize_t ehea_probe_port(struct device *dev,
3266 struct device_attribute *attr,
3267 const char *buf, size_t count)
3268 {
3269 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3270 struct ehea_port *port;
3271 struct device_node *eth_dn = NULL;
3272 int i;
3273
3274 u32 logical_port_id;
3275
3276 sscanf(buf, "%d", &logical_port_id);
3277
3278 port = ehea_get_port(adapter, logical_port_id);
3279
3280 if (port) {
3281 ehea_info("adding port with logical port id=%d failed. port "
3282 "already configured as %s.", logical_port_id,
3283 port->netdev->name);
3284 return -EINVAL;
3285 }
3286
3287 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3288
3289 if (!eth_dn) {
3290 ehea_info("no logical port with id %d found", logical_port_id);
3291 return -EINVAL;
3292 }
3293
3294 if (ehea_add_adapter_mr(adapter)) {
3295 ehea_error("creating MR failed");
3296 return -EIO;
3297 }
3298
3299 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3300
3301 of_node_put(eth_dn);
3302
3303 if (port) {
3304 for (i = 0; i < EHEA_MAX_PORTS; i++)
3305 if (!adapter->port[i]) {
3306 adapter->port[i] = port;
3307 break;
3308 }
3309
3310 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3311 logical_port_id);
3312 } else {
3313 ehea_remove_adapter_mr(adapter);
3314 return -EIO;
3315 }
3316
3317 return (ssize_t) count;
3318 }
3319
3320 static ssize_t ehea_remove_port(struct device *dev,
3321 struct device_attribute *attr,
3322 const char *buf, size_t count)
3323 {
3324 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3325 struct ehea_port *port;
3326 int i;
3327 u32 logical_port_id;
3328
3329 sscanf(buf, "%d", &logical_port_id);
3330
3331 port = ehea_get_port(adapter, logical_port_id);
3332
3333 if (port) {
3334 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3335 logical_port_id);
3336
3337 ehea_shutdown_single_port(port);
3338
3339 for (i = 0; i < EHEA_MAX_PORTS; i++)
3340 if (adapter->port[i] == port) {
3341 adapter->port[i] = NULL;
3342 break;
3343 }
3344 } else {
3345 ehea_error("removing port with logical port id=%d failed. port "
3346 "not configured.", logical_port_id);
3347 return -EINVAL;
3348 }
3349
3350 ehea_remove_adapter_mr(adapter);
3351
3352 return (ssize_t) count;
3353 }
3354
3355 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3356 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3357
3358 int ehea_create_device_sysfs(struct of_device *dev)
3359 {
3360 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3361 if (ret)
3362 goto out;
3363
3364 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3365 out:
3366 return ret;
3367 }
3368
3369 void ehea_remove_device_sysfs(struct of_device *dev)
3370 {
3371 device_remove_file(&dev->dev, &dev_attr_probe_port);
3372 device_remove_file(&dev->dev, &dev_attr_remove_port);
3373 }
3374
3375 static int __devinit ehea_probe_adapter(struct of_device *dev,
3376 const struct of_device_id *id)
3377 {
3378 struct ehea_adapter *adapter;
3379 const u64 *adapter_handle;
3380 int ret;
3381
3382 if (!dev || !dev->node) {
3383 ehea_error("Invalid ibmebus device probed");
3384 return -EINVAL;
3385 }
3386
3387 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3388 if (!adapter) {
3389 ret = -ENOMEM;
3390 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3391 goto out;
3392 }
3393
3394 list_add(&adapter->list, &adapter_list);
3395
3396 adapter->ofdev = dev;
3397
3398 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3399 NULL);
3400 if (adapter_handle)
3401 adapter->handle = *adapter_handle;
3402
3403 if (!adapter->handle) {
3404 dev_err(&dev->dev, "failed getting handle for adapter"
3405 " '%s'\n", dev->node->full_name);
3406 ret = -ENODEV;
3407 goto out_free_ad;
3408 }
3409
3410 adapter->pd = EHEA_PD_ID;
3411
3412 dev_set_drvdata(&dev->dev, adapter);
3413
3414
3415 /* initialize adapter and ports */
3416 /* get adapter properties */
3417 ret = ehea_sense_adapter_attr(adapter);
3418 if (ret) {
3419 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3420 goto out_free_ad;
3421 }
3422
3423 adapter->neq = ehea_create_eq(adapter,
3424 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3425 if (!adapter->neq) {
3426 ret = -EIO;
3427 dev_err(&dev->dev, "NEQ creation failed\n");
3428 goto out_free_ad;
3429 }
3430
3431 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3432 (unsigned long)adapter);
3433
3434 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3435 ehea_interrupt_neq, IRQF_DISABLED,
3436 "ehea_neq", adapter);
3437 if (ret) {
3438 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3439 goto out_kill_eq;
3440 }
3441
3442 ret = ehea_create_device_sysfs(dev);
3443 if (ret)
3444 goto out_free_irq;
3445
3446 ret = ehea_setup_ports(adapter);
3447 if (ret) {
3448 dev_err(&dev->dev, "setup_ports failed\n");
3449 goto out_rem_dev_sysfs;
3450 }
3451
3452 ret = 0;
3453 goto out;
3454
3455 out_rem_dev_sysfs:
3456 ehea_remove_device_sysfs(dev);
3457
3458 out_free_irq:
3459 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3460
3461 out_kill_eq:
3462 ehea_destroy_eq(adapter->neq);
3463
3464 out_free_ad:
3465 list_del(&adapter->list);
3466 kfree(adapter);
3467
3468 out:
3469 ehea_update_firmware_handles();
3470
3471 return ret;
3472 }
3473
3474 static int __devexit ehea_remove(struct of_device *dev)
3475 {
3476 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3477 int i;
3478
3479 for (i = 0; i < EHEA_MAX_PORTS; i++)
3480 if (adapter->port[i]) {
3481 ehea_shutdown_single_port(adapter->port[i]);
3482 adapter->port[i] = NULL;
3483 }
3484
3485 ehea_remove_device_sysfs(dev);
3486
3487 flush_scheduled_work();
3488
3489 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3490 tasklet_kill(&adapter->neq_tasklet);
3491
3492 ehea_destroy_eq(adapter->neq);
3493 ehea_remove_adapter_mr(adapter);
3494 list_del(&adapter->list);
3495 kfree(adapter);
3496
3497 ehea_update_firmware_handles();
3498
3499 return 0;
3500 }
3501
3502 void ehea_crash_handler(void)
3503 {
3504 int i;
3505
3506 if (ehea_fw_handles.arr)
3507 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3508 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3509 ehea_fw_handles.arr[i].fwh,
3510 FORCE_FREE);
3511
3512 if (ehea_bcmc_regs.arr)
3513 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3514 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3515 ehea_bcmc_regs.arr[i].port_id,
3516 ehea_bcmc_regs.arr[i].reg_type,
3517 ehea_bcmc_regs.arr[i].macaddr,
3518 0, H_DEREG_BCMC);
3519 }
3520
3521 static int ehea_mem_notifier(struct notifier_block *nb,
3522 unsigned long action, void *data)
3523 {
3524 struct memory_notify *arg = data;
3525 switch (action) {
3526 case MEM_CANCEL_OFFLINE:
3527 ehea_info("memory offlining canceled");
3528 /* Readd canceled memory block */
3529 case MEM_ONLINE:
3530 ehea_info("memory is going online");
3531 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3532 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3533 return NOTIFY_BAD;
3534 ehea_rereg_mrs(NULL);
3535 break;
3536 case MEM_GOING_OFFLINE:
3537 ehea_info("memory is going offline");
3538 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3539 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3540 return NOTIFY_BAD;
3541 ehea_rereg_mrs(NULL);
3542 break;
3543 default:
3544 break;
3545 }
3546
3547 ehea_update_firmware_handles();
3548
3549 return NOTIFY_OK;
3550 }
3551
3552 static struct notifier_block ehea_mem_nb = {
3553 .notifier_call = ehea_mem_notifier,
3554 };
3555
3556 static int ehea_reboot_notifier(struct notifier_block *nb,
3557 unsigned long action, void *unused)
3558 {
3559 if (action == SYS_RESTART) {
3560 ehea_info("Reboot: freeing all eHEA resources");
3561 ibmebus_unregister_driver(&ehea_driver);
3562 }
3563 return NOTIFY_DONE;
3564 }
3565
3566 static struct notifier_block ehea_reboot_nb = {
3567 .notifier_call = ehea_reboot_notifier,
3568 };
3569
3570 static int check_module_parm(void)
3571 {
3572 int ret = 0;
3573
3574 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3575 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3576 ehea_info("Bad parameter: rq1_entries");
3577 ret = -EINVAL;
3578 }
3579 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3580 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3581 ehea_info("Bad parameter: rq2_entries");
3582 ret = -EINVAL;
3583 }
3584 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3585 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3586 ehea_info("Bad parameter: rq3_entries");
3587 ret = -EINVAL;
3588 }
3589 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3590 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3591 ehea_info("Bad parameter: sq_entries");
3592 ret = -EINVAL;
3593 }
3594
3595 return ret;
3596 }
3597
3598 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3599 char *buf)
3600 {
3601 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3602 }
3603
3604 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3605 ehea_show_capabilities, NULL);
3606
3607 int __init ehea_module_init(void)
3608 {
3609 int ret;
3610
3611 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3612 DRV_VERSION);
3613
3614
3615 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3616 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3617 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3618
3619 mutex_init(&ehea_fw_handles.lock);
3620 spin_lock_init(&ehea_bcmc_regs.lock);
3621
3622 ret = check_module_parm();
3623 if (ret)
3624 goto out;
3625
3626 ret = ehea_create_busmap();
3627 if (ret)
3628 goto out;
3629
3630 ret = register_reboot_notifier(&ehea_reboot_nb);
3631 if (ret)
3632 ehea_info("failed registering reboot notifier");
3633
3634 ret = register_memory_notifier(&ehea_mem_nb);
3635 if (ret)
3636 ehea_info("failed registering memory remove notifier");
3637
3638 ret = crash_shutdown_register(&ehea_crash_handler);
3639 if (ret)
3640 ehea_info("failed registering crash handler");
3641
3642 ret = ibmebus_register_driver(&ehea_driver);
3643 if (ret) {
3644 ehea_error("failed registering eHEA device driver on ebus");
3645 goto out2;
3646 }
3647
3648 ret = driver_create_file(&ehea_driver.driver,
3649 &driver_attr_capabilities);
3650 if (ret) {
3651 ehea_error("failed to register capabilities attribute, ret=%d",
3652 ret);
3653 goto out3;
3654 }
3655
3656 return ret;
3657
3658 out3:
3659 ibmebus_unregister_driver(&ehea_driver);
3660 out2:
3661 unregister_memory_notifier(&ehea_mem_nb);
3662 unregister_reboot_notifier(&ehea_reboot_nb);
3663 crash_shutdown_unregister(&ehea_crash_handler);
3664 out:
3665 return ret;
3666 }
3667
3668 static void __exit ehea_module_exit(void)
3669 {
3670 int ret;
3671
3672 flush_scheduled_work();
3673 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3674 ibmebus_unregister_driver(&ehea_driver);
3675 unregister_reboot_notifier(&ehea_reboot_nb);
3676 ret = crash_shutdown_unregister(&ehea_crash_handler);
3677 if (ret)
3678 ehea_info("failed unregistering crash handler");
3679 unregister_memory_notifier(&ehea_mem_nb);
3680 kfree(ehea_fw_handles.arr);
3681 kfree(ehea_bcmc_regs.arr);
3682 ehea_destroy_busmap();
3683 }
3684
3685 module_init(ehea_module_init);
3686 module_exit(ehea_module_exit);
Linux with added FPC-III support