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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / net / ehea / ehea_main.c
blob41bd7aeafd8248119b21fe13e6e7576012e6bd29
1 /*
2 * linux/drivers/net/ehea/ehea_main.c
3 *
4 * eHEA ethernet device driver for IBM eServer System p
5 *
6 * (C) Copyright IBM Corp. 2006
7 *
8 * Authors:
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
12 *
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #include <linux/in.h>
30 #include <linux/ip.h>
31 #include <linux/tcp.h>
32 #include <linux/udp.h>
33 #include <linux/if.h>
34 #include <linux/list.h>
35 #include <linux/if_ether.h>
36 #include <linux/notifier.h>
37 #include <linux/reboot.h>
38 #include <linux/memory.h>
39 #include <asm/kexec.h>
40 #include <linux/mutex.h>
41
42 #include <net/ip.h>
43
44 #include "ehea.h"
45 #include "ehea_qmr.h"
46 #include "ehea_phyp.h"
47
48
49 MODULE_LICENSE("GPL");
50 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
51 MODULE_DESCRIPTION("IBM eServer HEA Driver");
52 MODULE_VERSION(DRV_VERSION);
53
54
55 static int msg_level = -1;
56 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
57 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
58 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
59 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
60 static int use_mcs;
61 static int use_lro;
62 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
63 static int num_tx_qps = EHEA_NUM_TX_QP;
64 static int prop_carrier_state;
65
66 module_param(msg_level, int, 0);
67 module_param(rq1_entries, int, 0);
68 module_param(rq2_entries, int, 0);
69 module_param(rq3_entries, int, 0);
70 module_param(sq_entries, int, 0);
71 module_param(prop_carrier_state, int, 0);
72 module_param(use_mcs, int, 0);
73 module_param(use_lro, int, 0);
74 module_param(lro_max_aggr, int, 0);
75 module_param(num_tx_qps, int, 0);
76
77 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
78 MODULE_PARM_DESC(msg_level, "msg_level");
79 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
80 "port to stack. 1:yes, 0:no. Default = 0 ");
81 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
82 "[2^x - 1], x = [6..14]. Default = "
83 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
84 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
85 "[2^x - 1], x = [6..14]. Default = "
86 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
87 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
88 "[2^x - 1], x = [6..14]. Default = "
89 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
90 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
91 "[2^x - 1], x = [6..14]. Default = "
92 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
93 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
94
95 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
96 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
97 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
98 "Default = 0");
99
100 static int port_name_cnt;
101 static LIST_HEAD(adapter_list);
102 static unsigned long ehea_driver_flags;
103 struct work_struct ehea_rereg_mr_task;
104 static DEFINE_MUTEX(dlpar_mem_lock);
105 struct ehea_fw_handle_array ehea_fw_handles;
106 struct ehea_bcmc_reg_array ehea_bcmc_regs;
107
108
109 static int __devinit ehea_probe_adapter(struct of_device *dev,
110 const struct of_device_id *id);
111
112 static int __devexit ehea_remove(struct of_device *dev);
113
114 static struct of_device_id ehea_device_table[] = {
115 {
116 .name = "lhea",
117 .compatible = "IBM,lhea",
118 },
119 {},
120 };
121 MODULE_DEVICE_TABLE(of, ehea_device_table);
122
123 static struct of_platform_driver ehea_driver = {
124 .name = "ehea",
125 .match_table = ehea_device_table,
126 .probe = ehea_probe_adapter,
127 .remove = ehea_remove,
128 };
129
130 void ehea_dump(void *adr, int len, char *msg)
131 {
132 int x;
133 unsigned char *deb = adr;
134 for (x = 0; x < len; x += 16) {
135 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
136 deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
137 deb += 16;
138 }
139 }
140
141 void ehea_schedule_port_reset(struct ehea_port *port)
142 {
143 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
144 schedule_work(&port->reset_task);
145 }
146
147 static void ehea_update_firmware_handles(void)
148 {
149 struct ehea_fw_handle_entry *arr = NULL;
150 struct ehea_adapter *adapter;
151 int num_adapters = 0;
152 int num_ports = 0;
153 int num_portres = 0;
154 int i = 0;
155 int num_fw_handles, k, l;
156
157 /* Determine number of handles */
158 mutex_lock(&ehea_fw_handles.lock);
159
160 list_for_each_entry(adapter, &adapter_list, list) {
161 num_adapters++;
162
163 for (k = 0; k < EHEA_MAX_PORTS; k++) {
164 struct ehea_port *port = adapter->port[k];
165
166 if (!port || (port->state != EHEA_PORT_UP))
167 continue;
168
169 num_ports++;
170 num_portres += port->num_def_qps + port->num_add_tx_qps;
171 }
172 }
173
174 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
175 num_ports * EHEA_NUM_PORT_FW_HANDLES +
176 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
177
178 if (num_fw_handles) {
179 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
180 if (!arr)
181 goto out; /* Keep the existing array */
182 } else
183 goto out_update;
184
185 list_for_each_entry(adapter, &adapter_list, list) {
186 if (num_adapters == 0)
187 break;
188
189 for (k = 0; k < EHEA_MAX_PORTS; k++) {
190 struct ehea_port *port = adapter->port[k];
191
192 if (!port || (port->state != EHEA_PORT_UP)
193 || (num_ports == 0))
194 continue;
195
196 for (l = 0;
197 l < port->num_def_qps + port->num_add_tx_qps;
198 l++) {
199 struct ehea_port_res *pr = &port->port_res[l];
200
201 arr[i].adh = adapter->handle;
202 arr[i++].fwh = pr->qp->fw_handle;
203 arr[i].adh = adapter->handle;
204 arr[i++].fwh = pr->send_cq->fw_handle;
205 arr[i].adh = adapter->handle;
206 arr[i++].fwh = pr->recv_cq->fw_handle;
207 arr[i].adh = adapter->handle;
208 arr[i++].fwh = pr->eq->fw_handle;
209 arr[i].adh = adapter->handle;
210 arr[i++].fwh = pr->send_mr.handle;
211 arr[i].adh = adapter->handle;
212 arr[i++].fwh = pr->recv_mr.handle;
213 }
214 arr[i].adh = adapter->handle;
215 arr[i++].fwh = port->qp_eq->fw_handle;
216 num_ports--;
217 }
218
219 arr[i].adh = adapter->handle;
220 arr[i++].fwh = adapter->neq->fw_handle;
221
222 if (adapter->mr.handle) {
223 arr[i].adh = adapter->handle;
224 arr[i++].fwh = adapter->mr.handle;
225 }
226 num_adapters--;
227 }
228
229 out_update:
230 kfree(ehea_fw_handles.arr);
231 ehea_fw_handles.arr = arr;
232 ehea_fw_handles.num_entries = i;
233 out:
234 mutex_unlock(&ehea_fw_handles.lock);
235 }
236
237 static void ehea_update_bcmc_registrations(void)
238 {
239 unsigned long flags;
240 struct ehea_bcmc_reg_entry *arr = NULL;
241 struct ehea_adapter *adapter;
242 struct ehea_mc_list *mc_entry;
243 int num_registrations = 0;
244 int i = 0;
245 int k;
246
247 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
248
249 /* Determine number of registrations */
250 list_for_each_entry(adapter, &adapter_list, list)
251 for (k = 0; k < EHEA_MAX_PORTS; k++) {
252 struct ehea_port *port = adapter->port[k];
253
254 if (!port || (port->state != EHEA_PORT_UP))
255 continue;
256
257 num_registrations += 2; /* Broadcast registrations */
258
259 list_for_each_entry(mc_entry, &port->mc_list->list,list)
260 num_registrations += 2;
261 }
262
263 if (num_registrations) {
264 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
265 if (!arr)
266 goto out; /* Keep the existing array */
267 } else
268 goto out_update;
269
270 list_for_each_entry(adapter, &adapter_list, list) {
271 for (k = 0; k < EHEA_MAX_PORTS; k++) {
272 struct ehea_port *port = adapter->port[k];
273
274 if (!port || (port->state != EHEA_PORT_UP))
275 continue;
276
277 if (num_registrations == 0)
278 goto out_update;
279
280 arr[i].adh = adapter->handle;
281 arr[i].port_id = port->logical_port_id;
282 arr[i].reg_type = EHEA_BCMC_BROADCAST |
283 EHEA_BCMC_UNTAGGED;
284 arr[i++].macaddr = port->mac_addr;
285
286 arr[i].adh = adapter->handle;
287 arr[i].port_id = port->logical_port_id;
288 arr[i].reg_type = EHEA_BCMC_BROADCAST |
289 EHEA_BCMC_VLANID_ALL;
290 arr[i++].macaddr = port->mac_addr;
291 num_registrations -= 2;
292
293 list_for_each_entry(mc_entry,
294 &port->mc_list->list, list) {
295 if (num_registrations == 0)
296 goto out_update;
297
298 arr[i].adh = adapter->handle;
299 arr[i].port_id = port->logical_port_id;
300 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
301 EHEA_BCMC_MULTICAST |
302 EHEA_BCMC_UNTAGGED;
303 arr[i++].macaddr = mc_entry->macaddr;
304
305 arr[i].adh = adapter->handle;
306 arr[i].port_id = port->logical_port_id;
307 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
308 EHEA_BCMC_MULTICAST |
309 EHEA_BCMC_VLANID_ALL;
310 arr[i++].macaddr = mc_entry->macaddr;
311 num_registrations -= 2;
312 }
313 }
314 }
315
316 out_update:
317 kfree(ehea_bcmc_regs.arr);
318 ehea_bcmc_regs.arr = arr;
319 ehea_bcmc_regs.num_entries = i;
320 out:
321 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
322 }
323
324 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
325 {
326 struct ehea_port *port = netdev_priv(dev);
327 struct net_device_stats *stats = &port->stats;
328 struct hcp_ehea_port_cb2 *cb2;
329 u64 hret, rx_packets, tx_packets;
330 int i;
331
332 memset(stats, 0, sizeof(*stats));
333
334 cb2 = (void *)get_zeroed_page(GFP_ATOMIC);
335 if (!cb2) {
336 ehea_error("no mem for cb2");
337 goto out;
338 }
339
340 hret = ehea_h_query_ehea_port(port->adapter->handle,
341 port->logical_port_id,
342 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
343 if (hret != H_SUCCESS) {
344 ehea_error("query_ehea_port failed");
345 goto out_herr;
346 }
347
348 if (netif_msg_hw(port))
349 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
350
351 rx_packets = 0;
352 for (i = 0; i < port->num_def_qps; i++)
353 rx_packets += port->port_res[i].rx_packets;
354
355 tx_packets = 0;
356 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
357 tx_packets += port->port_res[i].tx_packets;
358
359 stats->tx_packets = tx_packets;
360 stats->multicast = cb2->rxmcp;
361 stats->rx_errors = cb2->rxuerr;
362 stats->rx_bytes = cb2->rxo;
363 stats->tx_bytes = cb2->txo;
364 stats->rx_packets = rx_packets;
365
366 out_herr:
367 free_page((unsigned long)cb2);
368 out:
369 return stats;
370 }
371
372 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
373 {
374 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
375 struct net_device *dev = pr->port->netdev;
376 int max_index_mask = pr->rq1_skba.len - 1;
377 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
378 int adder = 0;
379 int i;
380
381 pr->rq1_skba.os_skbs = 0;
382
383 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
384 if (nr_of_wqes > 0)
385 pr->rq1_skba.index = index;
386 pr->rq1_skba.os_skbs = fill_wqes;
387 return;
388 }
389
390 for (i = 0; i < fill_wqes; i++) {
391 if (!skb_arr_rq1[index]) {
392 skb_arr_rq1[index] = netdev_alloc_skb(dev,
393 EHEA_L_PKT_SIZE);
394 if (!skb_arr_rq1[index]) {
395 pr->rq1_skba.os_skbs = fill_wqes - i;
396 break;
397 }
398 }
399 index--;
400 index &= max_index_mask;
401 adder++;
402 }
403
404 if (adder == 0)
405 return;
406
407 /* Ring doorbell */
408 ehea_update_rq1a(pr->qp, adder);
409 }
410
411 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
412 {
413 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
414 struct net_device *dev = pr->port->netdev;
415 int i;
416
417 for (i = 0; i < pr->rq1_skba.len; i++) {
418 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
419 if (!skb_arr_rq1[i])
420 break;
421 }
422 /* Ring doorbell */
423 ehea_update_rq1a(pr->qp, nr_rq1a);
424 }
425
426 static int ehea_refill_rq_def(struct ehea_port_res *pr,
427 struct ehea_q_skb_arr *q_skba, int rq_nr,
428 int num_wqes, int wqe_type, int packet_size)
429 {
430 struct net_device *dev = pr->port->netdev;
431 struct ehea_qp *qp = pr->qp;
432 struct sk_buff **skb_arr = q_skba->arr;
433 struct ehea_rwqe *rwqe;
434 int i, index, max_index_mask, fill_wqes;
435 int adder = 0;
436 int ret = 0;
437
438 fill_wqes = q_skba->os_skbs + num_wqes;
439 q_skba->os_skbs = 0;
440
441 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
442 q_skba->os_skbs = fill_wqes;
443 return ret;
444 }
445
446 index = q_skba->index;
447 max_index_mask = q_skba->len - 1;
448 for (i = 0; i < fill_wqes; i++) {
449 u64 tmp_addr;
450 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
451 if (!skb) {
452 q_skba->os_skbs = fill_wqes - i;
453 if (q_skba->os_skbs == q_skba->len - 2) {
454 ehea_info("%s: rq%i ran dry - no mem for skb",
455 pr->port->netdev->name, rq_nr);
456 ret = -ENOMEM;
457 }
458 break;
459 }
460 skb_reserve(skb, NET_IP_ALIGN);
461
462 skb_arr[index] = skb;
463 tmp_addr = ehea_map_vaddr(skb->data);
464 if (tmp_addr == -1) {
465 dev_kfree_skb(skb);
466 q_skba->os_skbs = fill_wqes - i;
467 ret = 0;
468 break;
469 }
470
471 rwqe = ehea_get_next_rwqe(qp, rq_nr);
472 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
473 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
474 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
475 rwqe->sg_list[0].vaddr = tmp_addr;
476 rwqe->sg_list[0].len = packet_size;
477 rwqe->data_segments = 1;
478
479 index++;
480 index &= max_index_mask;
481 adder++;
482 }
483
484 q_skba->index = index;
485 if (adder == 0)
486 goto out;
487
488 /* Ring doorbell */
489 iosync();
490 if (rq_nr == 2)
491 ehea_update_rq2a(pr->qp, adder);
492 else
493 ehea_update_rq3a(pr->qp, adder);
494 out:
495 return ret;
496 }
497
498
499 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
500 {
501 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
502 nr_of_wqes, EHEA_RWQE2_TYPE,
503 EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
504 }
505
506
507 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
508 {
509 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
510 nr_of_wqes, EHEA_RWQE3_TYPE,
511 EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
512 }
513
514 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
515 {
516 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
517 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
518 return 0;
519 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
520 (cqe->header_length == 0))
521 return 0;
522 return -EINVAL;
523 }
524
525 static inline void ehea_fill_skb(struct net_device *dev,
526 struct sk_buff *skb, struct ehea_cqe *cqe)
527 {
528 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
529
530 skb_put(skb, length);
531 skb->ip_summed = CHECKSUM_UNNECESSARY;
532 skb->protocol = eth_type_trans(skb, dev);
533 }
534
535 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
536 int arr_len,
537 struct ehea_cqe *cqe)
538 {
539 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
540 struct sk_buff *skb;
541 void *pref;
542 int x;
543
544 x = skb_index + 1;
545 x &= (arr_len - 1);
546
547 pref = skb_array[x];
548 if (pref) {
549 prefetchw(pref);
550 prefetchw(pref + EHEA_CACHE_LINE);
551
552 pref = (skb_array[x]->data);
553 prefetch(pref);
554 prefetch(pref + EHEA_CACHE_LINE);
555 prefetch(pref + EHEA_CACHE_LINE * 2);
556 prefetch(pref + EHEA_CACHE_LINE * 3);
557 }
558
559 skb = skb_array[skb_index];
560 skb_array[skb_index] = NULL;
561 return skb;
562 }
563
564 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
565 int arr_len, int wqe_index)
566 {
567 struct sk_buff *skb;
568 void *pref;
569 int x;
570
571 x = wqe_index + 1;
572 x &= (arr_len - 1);
573
574 pref = skb_array[x];
575 if (pref) {
576 prefetchw(pref);
577 prefetchw(pref + EHEA_CACHE_LINE);
578
579 pref = (skb_array[x]->data);
580 prefetchw(pref);
581 prefetchw(pref + EHEA_CACHE_LINE);
582 }
583
584 skb = skb_array[wqe_index];
585 skb_array[wqe_index] = NULL;
586 return skb;
587 }
588
589 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
590 struct ehea_cqe *cqe, int *processed_rq2,
591 int *processed_rq3)
592 {
593 struct sk_buff *skb;
594
595 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
596 pr->p_stats.err_tcp_cksum++;
597 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
598 pr->p_stats.err_ip_cksum++;
599 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
600 pr->p_stats.err_frame_crc++;
601
602 if (rq == 2) {
603 *processed_rq2 += 1;
604 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
605 dev_kfree_skb(skb);
606 } else if (rq == 3) {
607 *processed_rq3 += 1;
608 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
609 dev_kfree_skb(skb);
610 }
611
612 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
613 if (netif_msg_rx_err(pr->port)) {
614 ehea_error("Critical receive error for QP %d. "
615 "Resetting port.", pr->qp->init_attr.qp_nr);
616 ehea_dump(cqe, sizeof(*cqe), "CQE");
617 }
618 ehea_schedule_port_reset(pr->port);
619 return 1;
620 }
621
622 return 0;
623 }
624
625 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
626 void **tcph, u64 *hdr_flags, void *priv)
627 {
628 struct ehea_cqe *cqe = priv;
629 unsigned int ip_len;
630 struct iphdr *iph;
631
632 /* non tcp/udp packets */
633 if (!cqe->header_length)
634 return -1;
635
636 /* non tcp packet */
637 skb_reset_network_header(skb);
638 iph = ip_hdr(skb);
639 if (iph->protocol != IPPROTO_TCP)
640 return -1;
641
642 ip_len = ip_hdrlen(skb);
643 skb_set_transport_header(skb, ip_len);
644 *tcph = tcp_hdr(skb);
645
646 /* check if ip header and tcp header are complete */
647 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
648 return -1;
649
650 *hdr_flags = LRO_IPV4 | LRO_TCP;
651 *iphdr = iph;
652
653 return 0;
654 }
655
656 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
657 struct sk_buff *skb)
658 {
659 int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
660 && pr->port->vgrp;
661
662 if (use_lro) {
663 if (vlan_extracted)
664 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
665 pr->port->vgrp,
666 cqe->vlan_tag,
667 cqe);
668 else
669 lro_receive_skb(&pr->lro_mgr, skb, cqe);
670 } else {
671 if (vlan_extracted)
672 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
673 cqe->vlan_tag);
674 else
675 netif_receive_skb(skb);
676 }
677 }
678
679 static int ehea_proc_rwqes(struct net_device *dev,
680 struct ehea_port_res *pr,
681 int budget)
682 {
683 struct ehea_port *port = pr->port;
684 struct ehea_qp *qp = pr->qp;
685 struct ehea_cqe *cqe;
686 struct sk_buff *skb;
687 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
688 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
689 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
690 int skb_arr_rq1_len = pr->rq1_skba.len;
691 int skb_arr_rq2_len = pr->rq2_skba.len;
692 int skb_arr_rq3_len = pr->rq3_skba.len;
693 int processed, processed_rq1, processed_rq2, processed_rq3;
694 int wqe_index, last_wqe_index, rq, port_reset;
695
696 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
697 last_wqe_index = 0;
698
699 cqe = ehea_poll_rq1(qp, &wqe_index);
700 while ((processed < budget) && cqe) {
701 ehea_inc_rq1(qp);
702 processed_rq1++;
703 processed++;
704 if (netif_msg_rx_status(port))
705 ehea_dump(cqe, sizeof(*cqe), "CQE");
706
707 last_wqe_index = wqe_index;
708 rmb();
709 if (!ehea_check_cqe(cqe, &rq)) {
710 if (rq == 1) {
711 /* LL RQ1 */
712 skb = get_skb_by_index_ll(skb_arr_rq1,
713 skb_arr_rq1_len,
714 wqe_index);
715 if (unlikely(!skb)) {
716 if (netif_msg_rx_err(port))
717 ehea_error("LL rq1: skb=NULL");
718
719 skb = netdev_alloc_skb(dev,
720 EHEA_L_PKT_SIZE);
721 if (!skb)
722 break;
723 }
724 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
725 cqe->num_bytes_transfered - 4);
726 ehea_fill_skb(dev, skb, cqe);
727 } else if (rq == 2) {
728 /* RQ2 */
729 skb = get_skb_by_index(skb_arr_rq2,
730 skb_arr_rq2_len, cqe);
731 if (unlikely(!skb)) {
732 if (netif_msg_rx_err(port))
733 ehea_error("rq2: skb=NULL");
734 break;
735 }
736 ehea_fill_skb(dev, skb, cqe);
737 processed_rq2++;
738 } else {
739 /* RQ3 */
740 skb = get_skb_by_index(skb_arr_rq3,
741 skb_arr_rq3_len, cqe);
742 if (unlikely(!skb)) {
743 if (netif_msg_rx_err(port))
744 ehea_error("rq3: skb=NULL");
745 break;
746 }
747 ehea_fill_skb(dev, skb, cqe);
748 processed_rq3++;
749 }
750
751 ehea_proc_skb(pr, cqe, skb);
752 } else {
753 pr->p_stats.poll_receive_errors++;
754 port_reset = ehea_treat_poll_error(pr, rq, cqe,
755 &processed_rq2,
756 &processed_rq3);
757 if (port_reset)
758 break;
759 }
760 cqe = ehea_poll_rq1(qp, &wqe_index);
761 }
762 if (use_lro)
763 lro_flush_all(&pr->lro_mgr);
764
765 pr->rx_packets += processed;
766
767 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
768 ehea_refill_rq2(pr, processed_rq2);
769 ehea_refill_rq3(pr, processed_rq3);
770
771 return processed;
772 }
773
774 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
775 {
776 struct sk_buff *skb;
777 struct ehea_cq *send_cq = pr->send_cq;
778 struct ehea_cqe *cqe;
779 int quota = my_quota;
780 int cqe_counter = 0;
781 int swqe_av = 0;
782 int index;
783 unsigned long flags;
784
785 cqe = ehea_poll_cq(send_cq);
786 while (cqe && (quota > 0)) {
787 ehea_inc_cq(send_cq);
788
789 cqe_counter++;
790 rmb();
791 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
792 ehea_error("Send Completion Error: Resetting port");
793 if (netif_msg_tx_err(pr->port))
794 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
795 ehea_schedule_port_reset(pr->port);
796 break;
797 }
798
799 if (netif_msg_tx_done(pr->port))
800 ehea_dump(cqe, sizeof(*cqe), "CQE");
801
802 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
803 == EHEA_SWQE2_TYPE)) {
804
805 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
806 skb = pr->sq_skba.arr[index];
807 dev_kfree_skb(skb);
808 pr->sq_skba.arr[index] = NULL;
809 }
810
811 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
812 quota--;
813
814 cqe = ehea_poll_cq(send_cq);
815 };
816
817 ehea_update_feca(send_cq, cqe_counter);
818 atomic_add(swqe_av, &pr->swqe_avail);
819
820 spin_lock_irqsave(&pr->netif_queue, flags);
821
822 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
823 >= pr->swqe_refill_th)) {
824 netif_wake_queue(pr->port->netdev);
825 pr->queue_stopped = 0;
826 }
827 spin_unlock_irqrestore(&pr->netif_queue, flags);
828
829 return cqe;
830 }
831
832 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
833 #define EHEA_POLL_MAX_CQES 65535
834
835 static int ehea_poll(struct napi_struct *napi, int budget)
836 {
837 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
838 napi);
839 struct net_device *dev = pr->port->netdev;
840 struct ehea_cqe *cqe;
841 struct ehea_cqe *cqe_skb = NULL;
842 int force_irq, wqe_index;
843 int rx = 0;
844
845 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
846 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
847
848 if (!force_irq)
849 rx += ehea_proc_rwqes(dev, pr, budget - rx);
850
851 while ((rx != budget) || force_irq) {
852 pr->poll_counter = 0;
853 force_irq = 0;
854 napi_complete(napi);
855 ehea_reset_cq_ep(pr->recv_cq);
856 ehea_reset_cq_ep(pr->send_cq);
857 ehea_reset_cq_n1(pr->recv_cq);
858 ehea_reset_cq_n1(pr->send_cq);
859 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
860 cqe_skb = ehea_poll_cq(pr->send_cq);
861
862 if (!cqe && !cqe_skb)
863 return rx;
864
865 if (!napi_reschedule(napi))
866 return rx;
867
868 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
869 rx += ehea_proc_rwqes(dev, pr, budget - rx);
870 }
871
872 pr->poll_counter++;
873 return rx;
874 }
875
876 #ifdef CONFIG_NET_POLL_CONTROLLER
877 static void ehea_netpoll(struct net_device *dev)
878 {
879 struct ehea_port *port = netdev_priv(dev);
880 int i;
881
882 for (i = 0; i < port->num_def_qps; i++)
883 napi_schedule(&port->port_res[i].napi);
884 }
885 #endif
886
887 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
888 {
889 struct ehea_port_res *pr = param;
890
891 napi_schedule(&pr->napi);
892
893 return IRQ_HANDLED;
894 }
895
896 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
897 {
898 struct ehea_port *port = param;
899 struct ehea_eqe *eqe;
900 struct ehea_qp *qp;
901 u32 qp_token;
902
903 eqe = ehea_poll_eq(port->qp_eq);
904
905 while (eqe) {
906 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
907 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
908 eqe->entry, qp_token);
909
910 qp = port->port_res[qp_token].qp;
911 ehea_error_data(port->adapter, qp->fw_handle);
912 eqe = ehea_poll_eq(port->qp_eq);
913 }
914
915 ehea_schedule_port_reset(port);
916
917 return IRQ_HANDLED;
918 }
919
920 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
921 int logical_port)
922 {
923 int i;
924
925 for (i = 0; i < EHEA_MAX_PORTS; i++)
926 if (adapter->port[i])
927 if (adapter->port[i]->logical_port_id == logical_port)
928 return adapter->port[i];
929 return NULL;
930 }
931
932 int ehea_sense_port_attr(struct ehea_port *port)
933 {
934 int ret;
935 u64 hret;
936 struct hcp_ehea_port_cb0 *cb0;
937
938 /* may be called via ehea_neq_tasklet() */
939 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
940 if (!cb0) {
941 ehea_error("no mem for cb0");
942 ret = -ENOMEM;
943 goto out;
944 }
945
946 hret = ehea_h_query_ehea_port(port->adapter->handle,
947 port->logical_port_id, H_PORT_CB0,
948 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
949 cb0);
950 if (hret != H_SUCCESS) {
951 ret = -EIO;
952 goto out_free;
953 }
954
955 /* MAC address */
956 port->mac_addr = cb0->port_mac_addr << 16;
957
958 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
959 ret = -EADDRNOTAVAIL;
960 goto out_free;
961 }
962
963 /* Port speed */
964 switch (cb0->port_speed) {
965 case H_SPEED_10M_H:
966 port->port_speed = EHEA_SPEED_10M;
967 port->full_duplex = 0;
968 break;
969 case H_SPEED_10M_F:
970 port->port_speed = EHEA_SPEED_10M;
971 port->full_duplex = 1;
972 break;
973 case H_SPEED_100M_H:
974 port->port_speed = EHEA_SPEED_100M;
975 port->full_duplex = 0;
976 break;
977 case H_SPEED_100M_F:
978 port->port_speed = EHEA_SPEED_100M;
979 port->full_duplex = 1;
980 break;
981 case H_SPEED_1G_F:
982 port->port_speed = EHEA_SPEED_1G;
983 port->full_duplex = 1;
984 break;
985 case H_SPEED_10G_F:
986 port->port_speed = EHEA_SPEED_10G;
987 port->full_duplex = 1;
988 break;
989 default:
990 port->port_speed = 0;
991 port->full_duplex = 0;
992 break;
993 }
994
995 port->autoneg = 1;
996 port->num_mcs = cb0->num_default_qps;
997
998 /* Number of default QPs */
999 if (use_mcs)
1000 port->num_def_qps = cb0->num_default_qps;
1001 else
1002 port->num_def_qps = 1;
1003
1004 if (!port->num_def_qps) {
1005 ret = -EINVAL;
1006 goto out_free;
1007 }
1008
1009 port->num_tx_qps = num_tx_qps;
1010
1011 if (port->num_def_qps >= port->num_tx_qps)
1012 port->num_add_tx_qps = 0;
1013 else
1014 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1015
1016 ret = 0;
1017 out_free:
1018 if (ret || netif_msg_probe(port))
1019 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1020 free_page((unsigned long)cb0);
1021 out:
1022 return ret;
1023 }
1024
1025 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1026 {
1027 struct hcp_ehea_port_cb4 *cb4;
1028 u64 hret;
1029 int ret = 0;
1030
1031 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1032 if (!cb4) {
1033 ehea_error("no mem for cb4");
1034 ret = -ENOMEM;
1035 goto out;
1036 }
1037
1038 cb4->port_speed = port_speed;
1039
1040 netif_carrier_off(port->netdev);
1041
1042 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1043 port->logical_port_id,
1044 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1045 if (hret == H_SUCCESS) {
1046 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1047
1048 hret = ehea_h_query_ehea_port(port->adapter->handle,
1049 port->logical_port_id,
1050 H_PORT_CB4, H_PORT_CB4_SPEED,
1051 cb4);
1052 if (hret == H_SUCCESS) {
1053 switch (cb4->port_speed) {
1054 case H_SPEED_10M_H:
1055 port->port_speed = EHEA_SPEED_10M;
1056 port->full_duplex = 0;
1057 break;
1058 case H_SPEED_10M_F:
1059 port->port_speed = EHEA_SPEED_10M;
1060 port->full_duplex = 1;
1061 break;
1062 case H_SPEED_100M_H:
1063 port->port_speed = EHEA_SPEED_100M;
1064 port->full_duplex = 0;
1065 break;
1066 case H_SPEED_100M_F:
1067 port->port_speed = EHEA_SPEED_100M;
1068 port->full_duplex = 1;
1069 break;
1070 case H_SPEED_1G_F:
1071 port->port_speed = EHEA_SPEED_1G;
1072 port->full_duplex = 1;
1073 break;
1074 case H_SPEED_10G_F:
1075 port->port_speed = EHEA_SPEED_10G;
1076 port->full_duplex = 1;
1077 break;
1078 default:
1079 port->port_speed = 0;
1080 port->full_duplex = 0;
1081 break;
1082 }
1083 } else {
1084 ehea_error("Failed sensing port speed");
1085 ret = -EIO;
1086 }
1087 } else {
1088 if (hret == H_AUTHORITY) {
1089 ehea_info("Hypervisor denied setting port speed");
1090 ret = -EPERM;
1091 } else {
1092 ret = -EIO;
1093 ehea_error("Failed setting port speed");
1094 }
1095 }
1096 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1097 netif_carrier_on(port->netdev);
1098
1099 free_page((unsigned long)cb4);
1100 out:
1101 return ret;
1102 }
1103
1104 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1105 {
1106 int ret;
1107 u8 ec;
1108 u8 portnum;
1109 struct ehea_port *port;
1110
1111 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1112 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1113 port = ehea_get_port(adapter, portnum);
1114
1115 switch (ec) {
1116 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1117
1118 if (!port) {
1119 ehea_error("unknown portnum %x", portnum);
1120 break;
1121 }
1122
1123 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1124 if (!netif_carrier_ok(port->netdev)) {
1125 ret = ehea_sense_port_attr(port);
1126 if (ret) {
1127 ehea_error("failed resensing port "
1128 "attributes");
1129 break;
1130 }
1131
1132 if (netif_msg_link(port))
1133 ehea_info("%s: Logical port up: %dMbps "
1134 "%s Duplex",
1135 port->netdev->name,
1136 port->port_speed,
1137 port->full_duplex ==
1138 1 ? "Full" : "Half");
1139
1140 netif_carrier_on(port->netdev);
1141 netif_wake_queue(port->netdev);
1142 }
1143 } else
1144 if (netif_carrier_ok(port->netdev)) {
1145 if (netif_msg_link(port))
1146 ehea_info("%s: Logical port down",
1147 port->netdev->name);
1148 netif_carrier_off(port->netdev);
1149 netif_stop_queue(port->netdev);
1150 }
1151
1152 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1153 port->phy_link = EHEA_PHY_LINK_UP;
1154 if (netif_msg_link(port))
1155 ehea_info("%s: Physical port up",
1156 port->netdev->name);
1157 if (prop_carrier_state)
1158 netif_carrier_on(port->netdev);
1159 } else {
1160 port->phy_link = EHEA_PHY_LINK_DOWN;
1161 if (netif_msg_link(port))
1162 ehea_info("%s: Physical port down",
1163 port->netdev->name);
1164 if (prop_carrier_state)
1165 netif_carrier_off(port->netdev);
1166 }
1167
1168 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1169 ehea_info("External switch port is primary port");
1170 else
1171 ehea_info("External switch port is backup port");
1172
1173 break;
1174 case EHEA_EC_ADAPTER_MALFUNC:
1175 ehea_error("Adapter malfunction");
1176 break;
1177 case EHEA_EC_PORT_MALFUNC:
1178 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1179 netif_carrier_off(port->netdev);
1180 netif_stop_queue(port->netdev);
1181 break;
1182 default:
1183 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1184 break;
1185 }
1186 }
1187
1188 static void ehea_neq_tasklet(unsigned long data)
1189 {
1190 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1191 struct ehea_eqe *eqe;
1192 u64 event_mask;
1193
1194 eqe = ehea_poll_eq(adapter->neq);
1195 ehea_debug("eqe=%p", eqe);
1196
1197 while (eqe) {
1198 ehea_debug("*eqe=%lx", eqe->entry);
1199 ehea_parse_eqe(adapter, eqe->entry);
1200 eqe = ehea_poll_eq(adapter->neq);
1201 ehea_debug("next eqe=%p", eqe);
1202 }
1203
1204 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1205 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1206 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1207
1208 ehea_h_reset_events(adapter->handle,
1209 adapter->neq->fw_handle, event_mask);
1210 }
1211
1212 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1213 {
1214 struct ehea_adapter *adapter = param;
1215 tasklet_hi_schedule(&adapter->neq_tasklet);
1216 return IRQ_HANDLED;
1217 }
1218
1219
1220 static int ehea_fill_port_res(struct ehea_port_res *pr)
1221 {
1222 int ret;
1223 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1224
1225 ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1226 - init_attr->act_nr_rwqes_rq2
1227 - init_attr->act_nr_rwqes_rq3 - 1);
1228
1229 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1230
1231 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1232
1233 return ret;
1234 }
1235
1236 static int ehea_reg_interrupts(struct net_device *dev)
1237 {
1238 struct ehea_port *port = netdev_priv(dev);
1239 struct ehea_port_res *pr;
1240 int i, ret;
1241
1242
1243 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1244 dev->name);
1245
1246 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1247 ehea_qp_aff_irq_handler,
1248 IRQF_DISABLED, port->int_aff_name, port);
1249 if (ret) {
1250 ehea_error("failed registering irq for qp_aff_irq_handler:"
1251 "ist=%X", port->qp_eq->attr.ist1);
1252 goto out_free_qpeq;
1253 }
1254
1255 if (netif_msg_ifup(port))
1256 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1257 "registered", port->qp_eq->attr.ist1);
1258
1259
1260 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1261 pr = &port->port_res[i];
1262 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1263 "%s-queue%d", dev->name, i);
1264 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1265 ehea_recv_irq_handler,
1266 IRQF_DISABLED, pr->int_send_name,
1267 pr);
1268 if (ret) {
1269 ehea_error("failed registering irq for ehea_queue "
1270 "port_res_nr:%d, ist=%X", i,
1271 pr->eq->attr.ist1);
1272 goto out_free_req;
1273 }
1274 if (netif_msg_ifup(port))
1275 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1276 "%d registered", pr->eq->attr.ist1, i);
1277 }
1278 out:
1279 return ret;
1280
1281
1282 out_free_req:
1283 while (--i >= 0) {
1284 u32 ist = port->port_res[i].eq->attr.ist1;
1285 ibmebus_free_irq(ist, &port->port_res[i]);
1286 }
1287
1288 out_free_qpeq:
1289 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1290 i = port->num_def_qps;
1291
1292 goto out;
1293
1294 }
1295
1296 static void ehea_free_interrupts(struct net_device *dev)
1297 {
1298 struct ehea_port *port = netdev_priv(dev);
1299 struct ehea_port_res *pr;
1300 int i;
1301
1302 /* send */
1303
1304 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1305 pr = &port->port_res[i];
1306 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1307 if (netif_msg_intr(port))
1308 ehea_info("free send irq for res %d with handle 0x%X",
1309 i, pr->eq->attr.ist1);
1310 }
1311
1312 /* associated events */
1313 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1314 if (netif_msg_intr(port))
1315 ehea_info("associated event interrupt for handle 0x%X freed",
1316 port->qp_eq->attr.ist1);
1317 }
1318
1319 static int ehea_configure_port(struct ehea_port *port)
1320 {
1321 int ret, i;
1322 u64 hret, mask;
1323 struct hcp_ehea_port_cb0 *cb0;
1324
1325 ret = -ENOMEM;
1326 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1327 if (!cb0)
1328 goto out;
1329
1330 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1331 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1332 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1333 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1334 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1335 PXLY_RC_VLAN_FILTER)
1336 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1337
1338 for (i = 0; i < port->num_mcs; i++)
1339 if (use_mcs)
1340 cb0->default_qpn_arr[i] =
1341 port->port_res[i].qp->init_attr.qp_nr;
1342 else
1343 cb0->default_qpn_arr[i] =
1344 port->port_res[0].qp->init_attr.qp_nr;
1345
1346 if (netif_msg_ifup(port))
1347 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1348
1349 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1350 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1351
1352 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1353 port->logical_port_id,
1354 H_PORT_CB0, mask, cb0);
1355 ret = -EIO;
1356 if (hret != H_SUCCESS)
1357 goto out_free;
1358
1359 ret = 0;
1360
1361 out_free:
1362 free_page((unsigned long)cb0);
1363 out:
1364 return ret;
1365 }
1366
1367 int ehea_gen_smrs(struct ehea_port_res *pr)
1368 {
1369 int ret;
1370 struct ehea_adapter *adapter = pr->port->adapter;
1371
1372 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1373 if (ret)
1374 goto out;
1375
1376 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1377 if (ret)
1378 goto out_free;
1379
1380 return 0;
1381
1382 out_free:
1383 ehea_rem_mr(&pr->send_mr);
1384 out:
1385 ehea_error("Generating SMRS failed\n");
1386 return -EIO;
1387 }
1388
1389 int ehea_rem_smrs(struct ehea_port_res *pr)
1390 {
1391 if ((ehea_rem_mr(&pr->send_mr))
1392 || (ehea_rem_mr(&pr->recv_mr)))
1393 return -EIO;
1394 else
1395 return 0;
1396 }
1397
1398 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1399 {
1400 int arr_size = sizeof(void *) * max_q_entries;
1401
1402 q_skba->arr = vmalloc(arr_size);
1403 if (!q_skba->arr)
1404 return -ENOMEM;
1405
1406 memset(q_skba->arr, 0, arr_size);
1407
1408 q_skba->len = max_q_entries;
1409 q_skba->index = 0;
1410 q_skba->os_skbs = 0;
1411
1412 return 0;
1413 }
1414
1415 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1416 struct port_res_cfg *pr_cfg, int queue_token)
1417 {
1418 struct ehea_adapter *adapter = port->adapter;
1419 enum ehea_eq_type eq_type = EHEA_EQ;
1420 struct ehea_qp_init_attr *init_attr = NULL;
1421 int ret = -EIO;
1422
1423 memset(pr, 0, sizeof(struct ehea_port_res));
1424
1425 pr->port = port;
1426 spin_lock_init(&pr->xmit_lock);
1427 spin_lock_init(&pr->netif_queue);
1428
1429 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1430 if (!pr->eq) {
1431 ehea_error("create_eq failed (eq)");
1432 goto out_free;
1433 }
1434
1435 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1436 pr->eq->fw_handle,
1437 port->logical_port_id);
1438 if (!pr->recv_cq) {
1439 ehea_error("create_cq failed (cq_recv)");
1440 goto out_free;
1441 }
1442
1443 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1444 pr->eq->fw_handle,
1445 port->logical_port_id);
1446 if (!pr->send_cq) {
1447 ehea_error("create_cq failed (cq_send)");
1448 goto out_free;
1449 }
1450
1451 if (netif_msg_ifup(port))
1452 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1453 pr->send_cq->attr.act_nr_of_cqes,
1454 pr->recv_cq->attr.act_nr_of_cqes);
1455
1456 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1457 if (!init_attr) {
1458 ret = -ENOMEM;
1459 ehea_error("no mem for ehea_qp_init_attr");
1460 goto out_free;
1461 }
1462
1463 init_attr->low_lat_rq1 = 1;
1464 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1465 init_attr->rq_count = 3;
1466 init_attr->qp_token = queue_token;
1467 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1468 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1469 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1470 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1471 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1472 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1473 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1474 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1475 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1476 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1477 init_attr->port_nr = port->logical_port_id;
1478 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1479 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1480 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1481
1482 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1483 if (!pr->qp) {
1484 ehea_error("create_qp failed");
1485 ret = -EIO;
1486 goto out_free;
1487 }
1488
1489 if (netif_msg_ifup(port))
1490 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1491 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1492 init_attr->act_nr_send_wqes,
1493 init_attr->act_nr_rwqes_rq1,
1494 init_attr->act_nr_rwqes_rq2,
1495 init_attr->act_nr_rwqes_rq3);
1496
1497 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1498
1499 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1500 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1501 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1502 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1503 if (ret)
1504 goto out_free;
1505
1506 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1507 if (ehea_gen_smrs(pr) != 0) {
1508 ret = -EIO;
1509 goto out_free;
1510 }
1511
1512 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1513
1514 kfree(init_attr);
1515
1516 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1517
1518 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1519 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1520 pr->lro_mgr.lro_arr = pr->lro_desc;
1521 pr->lro_mgr.get_skb_header = get_skb_hdr;
1522 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1523 pr->lro_mgr.dev = port->netdev;
1524 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1525 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1526
1527 ret = 0;
1528 goto out;
1529
1530 out_free:
1531 kfree(init_attr);
1532 vfree(pr->sq_skba.arr);
1533 vfree(pr->rq1_skba.arr);
1534 vfree(pr->rq2_skba.arr);
1535 vfree(pr->rq3_skba.arr);
1536 ehea_destroy_qp(pr->qp);
1537 ehea_destroy_cq(pr->send_cq);
1538 ehea_destroy_cq(pr->recv_cq);
1539 ehea_destroy_eq(pr->eq);
1540 out:
1541 return ret;
1542 }
1543
1544 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1545 {
1546 int ret, i;
1547
1548 if (pr->qp)
1549 netif_napi_del(&pr->napi);
1550
1551 ret = ehea_destroy_qp(pr->qp);
1552
1553 if (!ret) {
1554 ehea_destroy_cq(pr->send_cq);
1555 ehea_destroy_cq(pr->recv_cq);
1556 ehea_destroy_eq(pr->eq);
1557
1558 for (i = 0; i < pr->rq1_skba.len; i++)
1559 if (pr->rq1_skba.arr[i])
1560 dev_kfree_skb(pr->rq1_skba.arr[i]);
1561
1562 for (i = 0; i < pr->rq2_skba.len; i++)
1563 if (pr->rq2_skba.arr[i])
1564 dev_kfree_skb(pr->rq2_skba.arr[i]);
1565
1566 for (i = 0; i < pr->rq3_skba.len; i++)
1567 if (pr->rq3_skba.arr[i])
1568 dev_kfree_skb(pr->rq3_skba.arr[i]);
1569
1570 for (i = 0; i < pr->sq_skba.len; i++)
1571 if (pr->sq_skba.arr[i])
1572 dev_kfree_skb(pr->sq_skba.arr[i]);
1573
1574 vfree(pr->rq1_skba.arr);
1575 vfree(pr->rq2_skba.arr);
1576 vfree(pr->rq3_skba.arr);
1577 vfree(pr->sq_skba.arr);
1578 ret = ehea_rem_smrs(pr);
1579 }
1580 return ret;
1581 }
1582
1583 /*
1584 * The write_* functions store information in swqe which is used by
1585 * the hardware to calculate the ip/tcp/udp checksum
1586 */
1587
1588 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1589 const struct sk_buff *skb)
1590 {
1591 swqe->ip_start = skb_network_offset(skb);
1592 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1593 }
1594
1595 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1596 const struct sk_buff *skb)
1597 {
1598 swqe->tcp_offset =
1599 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1600
1601 swqe->tcp_end = (u16)skb->len - 1;
1602 }
1603
1604 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1605 const struct sk_buff *skb)
1606 {
1607 swqe->tcp_offset =
1608 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1609
1610 swqe->tcp_end = (u16)skb->len - 1;
1611 }
1612
1613
1614 static void write_swqe2_TSO(struct sk_buff *skb,
1615 struct ehea_swqe *swqe, u32 lkey)
1616 {
1617 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1618 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1619 int skb_data_size = skb->len - skb->data_len;
1620 int headersize;
1621
1622 /* Packet is TCP with TSO enabled */
1623 swqe->tx_control |= EHEA_SWQE_TSO;
1624 swqe->mss = skb_shinfo(skb)->gso_size;
1625 /* copy only eth/ip/tcp headers to immediate data and
1626 * the rest of skb->data to sg1entry
1627 */
1628 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1629
1630 skb_data_size = skb->len - skb->data_len;
1631
1632 if (skb_data_size >= headersize) {
1633 /* copy immediate data */
1634 skb_copy_from_linear_data(skb, imm_data, headersize);
1635 swqe->immediate_data_length = headersize;
1636
1637 if (skb_data_size > headersize) {
1638 /* set sg1entry data */
1639 sg1entry->l_key = lkey;
1640 sg1entry->len = skb_data_size - headersize;
1641 sg1entry->vaddr =
1642 ehea_map_vaddr(skb->data + headersize);
1643 swqe->descriptors++;
1644 }
1645 } else
1646 ehea_error("cannot handle fragmented headers");
1647 }
1648
1649 static void write_swqe2_nonTSO(struct sk_buff *skb,
1650 struct ehea_swqe *swqe, u32 lkey)
1651 {
1652 int skb_data_size = skb->len - skb->data_len;
1653 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1654 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1655
1656 /* Packet is any nonTSO type
1657 *
1658 * Copy as much as possible skb->data to immediate data and
1659 * the rest to sg1entry
1660 */
1661 if (skb_data_size >= SWQE2_MAX_IMM) {
1662 /* copy immediate data */
1663 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1664
1665 swqe->immediate_data_length = SWQE2_MAX_IMM;
1666
1667 if (skb_data_size > SWQE2_MAX_IMM) {
1668 /* copy sg1entry data */
1669 sg1entry->l_key = lkey;
1670 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1671 sg1entry->vaddr =
1672 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1673 swqe->descriptors++;
1674 }
1675 } else {
1676 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1677 swqe->immediate_data_length = skb_data_size;
1678 }
1679 }
1680
1681 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1682 struct ehea_swqe *swqe, u32 lkey)
1683 {
1684 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1685 skb_frag_t *frag;
1686 int nfrags, sg1entry_contains_frag_data, i;
1687
1688 nfrags = skb_shinfo(skb)->nr_frags;
1689 sg1entry = &swqe->u.immdata_desc.sg_entry;
1690 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1691 swqe->descriptors = 0;
1692 sg1entry_contains_frag_data = 0;
1693
1694 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1695 write_swqe2_TSO(skb, swqe, lkey);
1696 else
1697 write_swqe2_nonTSO(skb, swqe, lkey);
1698
1699 /* write descriptors */
1700 if (nfrags > 0) {
1701 if (swqe->descriptors == 0) {
1702 /* sg1entry not yet used */
1703 frag = &skb_shinfo(skb)->frags[0];
1704
1705 /* copy sg1entry data */
1706 sg1entry->l_key = lkey;
1707 sg1entry->len = frag->size;
1708 sg1entry->vaddr =
1709 ehea_map_vaddr(page_address(frag->page)
1710 + frag->page_offset);
1711 swqe->descriptors++;
1712 sg1entry_contains_frag_data = 1;
1713 }
1714
1715 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1716
1717 frag = &skb_shinfo(skb)->frags[i];
1718 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1719
1720 sgentry->l_key = lkey;
1721 sgentry->len = frag->size;
1722 sgentry->vaddr =
1723 ehea_map_vaddr(page_address(frag->page)
1724 + frag->page_offset);
1725 swqe->descriptors++;
1726 }
1727 }
1728 }
1729
1730 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1731 {
1732 int ret = 0;
1733 u64 hret;
1734 u8 reg_type;
1735
1736 /* De/Register untagged packets */
1737 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1738 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1739 port->logical_port_id,
1740 reg_type, port->mac_addr, 0, hcallid);
1741 if (hret != H_SUCCESS) {
1742 ehea_error("%sregistering bc address failed (tagged)",
1743 hcallid == H_REG_BCMC ? "" : "de");
1744 ret = -EIO;
1745 goto out_herr;
1746 }
1747
1748 /* De/Register VLAN packets */
1749 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1750 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1751 port->logical_port_id,
1752 reg_type, port->mac_addr, 0, hcallid);
1753 if (hret != H_SUCCESS) {
1754 ehea_error("%sregistering bc address failed (vlan)",
1755 hcallid == H_REG_BCMC ? "" : "de");
1756 ret = -EIO;
1757 }
1758 out_herr:
1759 return ret;
1760 }
1761
1762 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1763 {
1764 struct ehea_port *port = netdev_priv(dev);
1765 struct sockaddr *mac_addr = sa;
1766 struct hcp_ehea_port_cb0 *cb0;
1767 int ret;
1768 u64 hret;
1769
1770 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1771 ret = -EADDRNOTAVAIL;
1772 goto out;
1773 }
1774
1775 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1776 if (!cb0) {
1777 ehea_error("no mem for cb0");
1778 ret = -ENOMEM;
1779 goto out;
1780 }
1781
1782 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1783
1784 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1785
1786 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1787 port->logical_port_id, H_PORT_CB0,
1788 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1789 if (hret != H_SUCCESS) {
1790 ret = -EIO;
1791 goto out_free;
1792 }
1793
1794 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1795
1796 /* Deregister old MAC in pHYP */
1797 if (port->state == EHEA_PORT_UP) {
1798 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1799 if (ret)
1800 goto out_upregs;
1801 }
1802
1803 port->mac_addr = cb0->port_mac_addr << 16;
1804
1805 /* Register new MAC in pHYP */
1806 if (port->state == EHEA_PORT_UP) {
1807 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1808 if (ret)
1809 goto out_upregs;
1810 }
1811
1812 ret = 0;
1813
1814 out_upregs:
1815 ehea_update_bcmc_registrations();
1816 out_free:
1817 free_page((unsigned long)cb0);
1818 out:
1819 return ret;
1820 }
1821
1822 static void ehea_promiscuous_error(u64 hret, int enable)
1823 {
1824 if (hret == H_AUTHORITY)
1825 ehea_info("Hypervisor denied %sabling promiscuous mode",
1826 enable == 1 ? "en" : "dis");
1827 else
1828 ehea_error("failed %sabling promiscuous mode",
1829 enable == 1 ? "en" : "dis");
1830 }
1831
1832 static void ehea_promiscuous(struct net_device *dev, int enable)
1833 {
1834 struct ehea_port *port = netdev_priv(dev);
1835 struct hcp_ehea_port_cb7 *cb7;
1836 u64 hret;
1837
1838 if ((enable && port->promisc) || (!enable && !port->promisc))
1839 return;
1840
1841 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1842 if (!cb7) {
1843 ehea_error("no mem for cb7");
1844 goto out;
1845 }
1846
1847 /* Modify Pxs_DUCQPN in CB7 */
1848 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1849
1850 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1851 port->logical_port_id,
1852 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1853 if (hret) {
1854 ehea_promiscuous_error(hret, enable);
1855 goto out;
1856 }
1857
1858 port->promisc = enable;
1859 out:
1860 free_page((unsigned long)cb7);
1861 return;
1862 }
1863
1864 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1865 u32 hcallid)
1866 {
1867 u64 hret;
1868 u8 reg_type;
1869
1870 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1871 | EHEA_BCMC_UNTAGGED;
1872
1873 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1874 port->logical_port_id,
1875 reg_type, mc_mac_addr, 0, hcallid);
1876 if (hret)
1877 goto out;
1878
1879 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1880 | EHEA_BCMC_VLANID_ALL;
1881
1882 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1883 port->logical_port_id,
1884 reg_type, mc_mac_addr, 0, hcallid);
1885 out:
1886 return hret;
1887 }
1888
1889 static int ehea_drop_multicast_list(struct net_device *dev)
1890 {
1891 struct ehea_port *port = netdev_priv(dev);
1892 struct ehea_mc_list *mc_entry = port->mc_list;
1893 struct list_head *pos;
1894 struct list_head *temp;
1895 int ret = 0;
1896 u64 hret;
1897
1898 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1899 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1900
1901 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1902 H_DEREG_BCMC);
1903 if (hret) {
1904 ehea_error("failed deregistering mcast MAC");
1905 ret = -EIO;
1906 }
1907
1908 list_del(pos);
1909 kfree(mc_entry);
1910 }
1911 return ret;
1912 }
1913
1914 static void ehea_allmulti(struct net_device *dev, int enable)
1915 {
1916 struct ehea_port *port = netdev_priv(dev);
1917 u64 hret;
1918
1919 if (!port->allmulti) {
1920 if (enable) {
1921 /* Enable ALLMULTI */
1922 ehea_drop_multicast_list(dev);
1923 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1924 if (!hret)
1925 port->allmulti = 1;
1926 else
1927 ehea_error("failed enabling IFF_ALLMULTI");
1928 }
1929 } else
1930 if (!enable) {
1931 /* Disable ALLMULTI */
1932 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1933 if (!hret)
1934 port->allmulti = 0;
1935 else
1936 ehea_error("failed disabling IFF_ALLMULTI");
1937 }
1938 }
1939
1940 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1941 {
1942 struct ehea_mc_list *ehea_mcl_entry;
1943 u64 hret;
1944
1945 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1946 if (!ehea_mcl_entry) {
1947 ehea_error("no mem for mcl_entry");
1948 return;
1949 }
1950
1951 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1952
1953 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1954
1955 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1956 H_REG_BCMC);
1957 if (!hret)
1958 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1959 else {
1960 ehea_error("failed registering mcast MAC");
1961 kfree(ehea_mcl_entry);
1962 }
1963 }
1964
1965 static void ehea_set_multicast_list(struct net_device *dev)
1966 {
1967 struct ehea_port *port = netdev_priv(dev);
1968 struct dev_mc_list *k_mcl_entry;
1969 int ret, i;
1970
1971 if (dev->flags & IFF_PROMISC) {
1972 ehea_promiscuous(dev, 1);
1973 return;
1974 }
1975 ehea_promiscuous(dev, 0);
1976
1977 if (dev->flags & IFF_ALLMULTI) {
1978 ehea_allmulti(dev, 1);
1979 goto out;
1980 }
1981 ehea_allmulti(dev, 0);
1982
1983 if (dev->mc_count) {
1984 ret = ehea_drop_multicast_list(dev);
1985 if (ret) {
1986 /* Dropping the current multicast list failed.
1987 * Enabling ALL_MULTI is the best we can do.
1988 */
1989 ehea_allmulti(dev, 1);
1990 }
1991
1992 if (dev->mc_count > port->adapter->max_mc_mac) {
1993 ehea_info("Mcast registration limit reached (0x%llx). "
1994 "Use ALLMULTI!",
1995 port->adapter->max_mc_mac);
1996 goto out;
1997 }
1998
1999 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
2000 k_mcl_entry = k_mcl_entry->next)
2001 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
2002
2003 }
2004 out:
2005 ehea_update_bcmc_registrations();
2006 return;
2007 }
2008
2009 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2010 {
2011 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2012 return -EINVAL;
2013 dev->mtu = new_mtu;
2014 return 0;
2015 }
2016
2017 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2018 struct ehea_swqe *swqe, u32 lkey)
2019 {
2020 if (skb->protocol == htons(ETH_P_IP)) {
2021 const struct iphdr *iph = ip_hdr(skb);
2022
2023 /* IPv4 */
2024 swqe->tx_control |= EHEA_SWQE_CRC
2025 | EHEA_SWQE_IP_CHECKSUM
2026 | EHEA_SWQE_TCP_CHECKSUM
2027 | EHEA_SWQE_IMM_DATA_PRESENT
2028 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2029
2030 write_ip_start_end(swqe, skb);
2031
2032 if (iph->protocol == IPPROTO_UDP) {
2033 if ((iph->frag_off & IP_MF)
2034 || (iph->frag_off & IP_OFFSET))
2035 /* IP fragment, so don't change cs */
2036 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2037 else
2038 write_udp_offset_end(swqe, skb);
2039 } else if (iph->protocol == IPPROTO_TCP) {
2040 write_tcp_offset_end(swqe, skb);
2041 }
2042
2043 /* icmp (big data) and ip segmentation packets (all other ip
2044 packets) do not require any special handling */
2045
2046 } else {
2047 /* Other Ethernet Protocol */
2048 swqe->tx_control |= EHEA_SWQE_CRC
2049 | EHEA_SWQE_IMM_DATA_PRESENT
2050 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2051 }
2052
2053 write_swqe2_data(skb, dev, swqe, lkey);
2054 }
2055
2056 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2057 struct ehea_swqe *swqe)
2058 {
2059 int nfrags = skb_shinfo(skb)->nr_frags;
2060 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2061 skb_frag_t *frag;
2062 int i;
2063
2064 if (skb->protocol == htons(ETH_P_IP)) {
2065 const struct iphdr *iph = ip_hdr(skb);
2066
2067 /* IPv4 */
2068 write_ip_start_end(swqe, skb);
2069
2070 if (iph->protocol == IPPROTO_TCP) {
2071 swqe->tx_control |= EHEA_SWQE_CRC
2072 | EHEA_SWQE_IP_CHECKSUM
2073 | EHEA_SWQE_TCP_CHECKSUM
2074 | EHEA_SWQE_IMM_DATA_PRESENT;
2075
2076 write_tcp_offset_end(swqe, skb);
2077
2078 } else if (iph->protocol == IPPROTO_UDP) {
2079 if ((iph->frag_off & IP_MF)
2080 || (iph->frag_off & IP_OFFSET))
2081 /* IP fragment, so don't change cs */
2082 swqe->tx_control |= EHEA_SWQE_CRC
2083 | EHEA_SWQE_IMM_DATA_PRESENT;
2084 else {
2085 swqe->tx_control |= EHEA_SWQE_CRC
2086 | EHEA_SWQE_IP_CHECKSUM
2087 | EHEA_SWQE_TCP_CHECKSUM
2088 | EHEA_SWQE_IMM_DATA_PRESENT;
2089
2090 write_udp_offset_end(swqe, skb);
2091 }
2092 } else {
2093 /* icmp (big data) and
2094 ip segmentation packets (all other ip packets) */
2095 swqe->tx_control |= EHEA_SWQE_CRC
2096 | EHEA_SWQE_IP_CHECKSUM
2097 | EHEA_SWQE_IMM_DATA_PRESENT;
2098 }
2099 } else {
2100 /* Other Ethernet Protocol */
2101 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2102 }
2103 /* copy (immediate) data */
2104 if (nfrags == 0) {
2105 /* data is in a single piece */
2106 skb_copy_from_linear_data(skb, imm_data, skb->len);
2107 } else {
2108 /* first copy data from the skb->data buffer ... */
2109 skb_copy_from_linear_data(skb, imm_data,
2110 skb->len - skb->data_len);
2111 imm_data += skb->len - skb->data_len;
2112
2113 /* ... then copy data from the fragments */
2114 for (i = 0; i < nfrags; i++) {
2115 frag = &skb_shinfo(skb)->frags[i];
2116 memcpy(imm_data,
2117 page_address(frag->page) + frag->page_offset,
2118 frag->size);
2119 imm_data += frag->size;
2120 }
2121 }
2122 swqe->immediate_data_length = skb->len;
2123 dev_kfree_skb(skb);
2124 }
2125
2126 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2127 {
2128 struct tcphdr *tcp;
2129 u32 tmp;
2130
2131 if ((skb->protocol == htons(ETH_P_IP)) &&
2132 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2133 tcp = (struct tcphdr *)(skb_network_header(skb) +
2134 (ip_hdr(skb)->ihl * 4));
2135 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2136 tmp += ip_hdr(skb)->daddr % 31;
2137 return tmp % num_qps;
2138 } else
2139 return 0;
2140 }
2141
2142 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2143 {
2144 struct ehea_port *port = netdev_priv(dev);
2145 struct ehea_swqe *swqe;
2146 unsigned long flags;
2147 u32 lkey;
2148 int swqe_index;
2149 struct ehea_port_res *pr;
2150
2151 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2152
2153 if (!spin_trylock(&pr->xmit_lock))
2154 return NETDEV_TX_BUSY;
2155
2156 if (pr->queue_stopped) {
2157 spin_unlock(&pr->xmit_lock);
2158 return NETDEV_TX_BUSY;
2159 }
2160
2161 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2162 memset(swqe, 0, SWQE_HEADER_SIZE);
2163 atomic_dec(&pr->swqe_avail);
2164
2165 if (skb->len <= SWQE3_MAX_IMM) {
2166 u32 sig_iv = port->sig_comp_iv;
2167 u32 swqe_num = pr->swqe_id_counter;
2168 ehea_xmit3(skb, dev, swqe);
2169 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2170 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2171 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2172 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2173 sig_iv);
2174 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2175 pr->swqe_ll_count = 0;
2176 } else
2177 pr->swqe_ll_count += 1;
2178 } else {
2179 swqe->wr_id =
2180 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2181 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2182 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2183 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2184 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2185
2186 pr->sq_skba.index++;
2187 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2188
2189 lkey = pr->send_mr.lkey;
2190 ehea_xmit2(skb, dev, swqe, lkey);
2191 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2192 }
2193 pr->swqe_id_counter += 1;
2194
2195 if (port->vgrp && vlan_tx_tag_present(skb)) {
2196 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2197 swqe->vlan_tag = vlan_tx_tag_get(skb);
2198 }
2199
2200 if (netif_msg_tx_queued(port)) {
2201 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2202 ehea_dump(swqe, 512, "swqe");
2203 }
2204
2205 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2206 netif_stop_queue(dev);
2207 swqe->tx_control |= EHEA_SWQE_PURGE;
2208 }
2209
2210 ehea_post_swqe(pr->qp, swqe);
2211 pr->tx_packets++;
2212
2213 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2214 spin_lock_irqsave(&pr->netif_queue, flags);
2215 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2216 pr->p_stats.queue_stopped++;
2217 netif_stop_queue(dev);
2218 pr->queue_stopped = 1;
2219 }
2220 spin_unlock_irqrestore(&pr->netif_queue, flags);
2221 }
2222 dev->trans_start = jiffies;
2223 spin_unlock(&pr->xmit_lock);
2224
2225 return NETDEV_TX_OK;
2226 }
2227
2228 static void ehea_vlan_rx_register(struct net_device *dev,
2229 struct vlan_group *grp)
2230 {
2231 struct ehea_port *port = netdev_priv(dev);
2232 struct ehea_adapter *adapter = port->adapter;
2233 struct hcp_ehea_port_cb1 *cb1;
2234 u64 hret;
2235
2236 port->vgrp = grp;
2237
2238 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2239 if (!cb1) {
2240 ehea_error("no mem for cb1");
2241 goto out;
2242 }
2243
2244 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2245 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2246 if (hret != H_SUCCESS)
2247 ehea_error("modify_ehea_port failed");
2248
2249 free_page((unsigned long)cb1);
2250 out:
2251 return;
2252 }
2253
2254 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2255 {
2256 struct ehea_port *port = netdev_priv(dev);
2257 struct ehea_adapter *adapter = port->adapter;
2258 struct hcp_ehea_port_cb1 *cb1;
2259 int index;
2260 u64 hret;
2261
2262 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2263 if (!cb1) {
2264 ehea_error("no mem for cb1");
2265 goto out;
2266 }
2267
2268 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2269 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2270 if (hret != H_SUCCESS) {
2271 ehea_error("query_ehea_port failed");
2272 goto out;
2273 }
2274
2275 index = (vid / 64);
2276 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2277
2278 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2279 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2280 if (hret != H_SUCCESS)
2281 ehea_error("modify_ehea_port failed");
2282 out:
2283 free_page((unsigned long)cb1);
2284 return;
2285 }
2286
2287 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2288 {
2289 struct ehea_port *port = netdev_priv(dev);
2290 struct ehea_adapter *adapter = port->adapter;
2291 struct hcp_ehea_port_cb1 *cb1;
2292 int index;
2293 u64 hret;
2294
2295 vlan_group_set_device(port->vgrp, vid, NULL);
2296
2297 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2298 if (!cb1) {
2299 ehea_error("no mem for cb1");
2300 goto out;
2301 }
2302
2303 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2304 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2305 if (hret != H_SUCCESS) {
2306 ehea_error("query_ehea_port failed");
2307 goto out;
2308 }
2309
2310 index = (vid / 64);
2311 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2312
2313 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2314 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2315 if (hret != H_SUCCESS)
2316 ehea_error("modify_ehea_port failed");
2317 out:
2318 free_page((unsigned long)cb1);
2319 return;
2320 }
2321
2322 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2323 {
2324 int ret = -EIO;
2325 u64 hret;
2326 u16 dummy16 = 0;
2327 u64 dummy64 = 0;
2328 struct hcp_modify_qp_cb0 *cb0;
2329
2330 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2331 if (!cb0) {
2332 ret = -ENOMEM;
2333 goto out;
2334 }
2335
2336 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2337 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2338 if (hret != H_SUCCESS) {
2339 ehea_error("query_ehea_qp failed (1)");
2340 goto out;
2341 }
2342
2343 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2344 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2345 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2346 &dummy64, &dummy64, &dummy16, &dummy16);
2347 if (hret != H_SUCCESS) {
2348 ehea_error("modify_ehea_qp failed (1)");
2349 goto out;
2350 }
2351
2352 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2353 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2354 if (hret != H_SUCCESS) {
2355 ehea_error("query_ehea_qp failed (2)");
2356 goto out;
2357 }
2358
2359 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2360 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2361 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2362 &dummy64, &dummy64, &dummy16, &dummy16);
2363 if (hret != H_SUCCESS) {
2364 ehea_error("modify_ehea_qp failed (2)");
2365 goto out;
2366 }
2367
2368 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2369 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2370 if (hret != H_SUCCESS) {
2371 ehea_error("query_ehea_qp failed (3)");
2372 goto out;
2373 }
2374
2375 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2376 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2377 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2378 &dummy64, &dummy64, &dummy16, &dummy16);
2379 if (hret != H_SUCCESS) {
2380 ehea_error("modify_ehea_qp failed (3)");
2381 goto out;
2382 }
2383
2384 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2385 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2386 if (hret != H_SUCCESS) {
2387 ehea_error("query_ehea_qp failed (4)");
2388 goto out;
2389 }
2390
2391 ret = 0;
2392 out:
2393 free_page((unsigned long)cb0);
2394 return ret;
2395 }
2396
2397 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2398 int add_tx_qps)
2399 {
2400 int ret, i;
2401 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2402 enum ehea_eq_type eq_type = EHEA_EQ;
2403
2404 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2405 EHEA_MAX_ENTRIES_EQ, 1);
2406 if (!port->qp_eq) {
2407 ret = -EINVAL;
2408 ehea_error("ehea_create_eq failed (qp_eq)");
2409 goto out_kill_eq;
2410 }
2411
2412 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2413 pr_cfg.max_entries_scq = sq_entries * 2;
2414 pr_cfg.max_entries_sq = sq_entries;
2415 pr_cfg.max_entries_rq1 = rq1_entries;
2416 pr_cfg.max_entries_rq2 = rq2_entries;
2417 pr_cfg.max_entries_rq3 = rq3_entries;
2418
2419 pr_cfg_small_rx.max_entries_rcq = 1;
2420 pr_cfg_small_rx.max_entries_scq = sq_entries;
2421 pr_cfg_small_rx.max_entries_sq = sq_entries;
2422 pr_cfg_small_rx.max_entries_rq1 = 1;
2423 pr_cfg_small_rx.max_entries_rq2 = 1;
2424 pr_cfg_small_rx.max_entries_rq3 = 1;
2425
2426 for (i = 0; i < def_qps; i++) {
2427 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2428 if (ret)
2429 goto out_clean_pr;
2430 }
2431 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2432 ret = ehea_init_port_res(port, &port->port_res[i],
2433 &pr_cfg_small_rx, i);
2434 if (ret)
2435 goto out_clean_pr;
2436 }
2437
2438 return 0;
2439
2440 out_clean_pr:
2441 while (--i >= 0)
2442 ehea_clean_portres(port, &port->port_res[i]);
2443
2444 out_kill_eq:
2445 ehea_destroy_eq(port->qp_eq);
2446 return ret;
2447 }
2448
2449 static int ehea_clean_all_portres(struct ehea_port *port)
2450 {
2451 int ret = 0;
2452 int i;
2453
2454 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2455 ret |= ehea_clean_portres(port, &port->port_res[i]);
2456
2457 ret |= ehea_destroy_eq(port->qp_eq);
2458
2459 return ret;
2460 }
2461
2462 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2463 {
2464 if (adapter->active_ports)
2465 return;
2466
2467 ehea_rem_mr(&adapter->mr);
2468 }
2469
2470 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2471 {
2472 if (adapter->active_ports)
2473 return 0;
2474
2475 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2476 }
2477
2478 static int ehea_up(struct net_device *dev)
2479 {
2480 int ret, i;
2481 struct ehea_port *port = netdev_priv(dev);
2482
2483 if (port->state == EHEA_PORT_UP)
2484 return 0;
2485
2486 ret = ehea_port_res_setup(port, port->num_def_qps,
2487 port->num_add_tx_qps);
2488 if (ret) {
2489 ehea_error("port_res_failed");
2490 goto out;
2491 }
2492
2493 /* Set default QP for this port */
2494 ret = ehea_configure_port(port);
2495 if (ret) {
2496 ehea_error("ehea_configure_port failed. ret:%d", ret);
2497 goto out_clean_pr;
2498 }
2499
2500 ret = ehea_reg_interrupts(dev);
2501 if (ret) {
2502 ehea_error("reg_interrupts failed. ret:%d", ret);
2503 goto out_clean_pr;
2504 }
2505
2506 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2507 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2508 if (ret) {
2509 ehea_error("activate_qp failed");
2510 goto out_free_irqs;
2511 }
2512 }
2513
2514 for (i = 0; i < port->num_def_qps; i++) {
2515 ret = ehea_fill_port_res(&port->port_res[i]);
2516 if (ret) {
2517 ehea_error("out_free_irqs");
2518 goto out_free_irqs;
2519 }
2520 }
2521
2522 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2523 if (ret) {
2524 ret = -EIO;
2525 goto out_free_irqs;
2526 }
2527
2528 port->state = EHEA_PORT_UP;
2529
2530 ret = 0;
2531 goto out;
2532
2533 out_free_irqs:
2534 ehea_free_interrupts(dev);
2535
2536 out_clean_pr:
2537 ehea_clean_all_portres(port);
2538 out:
2539 if (ret)
2540 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2541
2542 ehea_update_bcmc_registrations();
2543 ehea_update_firmware_handles();
2544
2545 return ret;
2546 }
2547
2548 static void port_napi_disable(struct ehea_port *port)
2549 {
2550 int i;
2551
2552 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2553 napi_disable(&port->port_res[i].napi);
2554 }
2555
2556 static void port_napi_enable(struct ehea_port *port)
2557 {
2558 int i;
2559
2560 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2561 napi_enable(&port->port_res[i].napi);
2562 }
2563
2564 static int ehea_open(struct net_device *dev)
2565 {
2566 int ret;
2567 struct ehea_port *port = netdev_priv(dev);
2568
2569 mutex_lock(&port->port_lock);
2570
2571 if (netif_msg_ifup(port))
2572 ehea_info("enabling port %s", dev->name);
2573
2574 ret = ehea_up(dev);
2575 if (!ret) {
2576 port_napi_enable(port);
2577 netif_start_queue(dev);
2578 }
2579
2580 mutex_unlock(&port->port_lock);
2581
2582 return ret;
2583 }
2584
2585 static int ehea_down(struct net_device *dev)
2586 {
2587 int ret;
2588 struct ehea_port *port = netdev_priv(dev);
2589
2590 if (port->state == EHEA_PORT_DOWN)
2591 return 0;
2592
2593 ehea_drop_multicast_list(dev);
2594 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2595
2596 ehea_free_interrupts(dev);
2597
2598 port->state = EHEA_PORT_DOWN;
2599
2600 ehea_update_bcmc_registrations();
2601
2602 ret = ehea_clean_all_portres(port);
2603 if (ret)
2604 ehea_info("Failed freeing resources for %s. ret=%i",
2605 dev->name, ret);
2606
2607 ehea_update_firmware_handles();
2608
2609 return ret;
2610 }
2611
2612 static int ehea_stop(struct net_device *dev)
2613 {
2614 int ret;
2615 struct ehea_port *port = netdev_priv(dev);
2616
2617 if (netif_msg_ifdown(port))
2618 ehea_info("disabling port %s", dev->name);
2619
2620 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2621 cancel_work_sync(&port->reset_task);
2622 mutex_lock(&port->port_lock);
2623 netif_stop_queue(dev);
2624 port_napi_disable(port);
2625 ret = ehea_down(dev);
2626 mutex_unlock(&port->port_lock);
2627 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2628 return ret;
2629 }
2630
2631 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2632 {
2633 struct ehea_qp qp = *orig_qp;
2634 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2635 struct ehea_swqe *swqe;
2636 int wqe_index;
2637 int i;
2638
2639 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2640 swqe = ehea_get_swqe(&qp, &wqe_index);
2641 swqe->tx_control |= EHEA_SWQE_PURGE;
2642 }
2643 }
2644
2645 static void ehea_flush_sq(struct ehea_port *port)
2646 {
2647 int i;
2648
2649 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2650 struct ehea_port_res *pr = &port->port_res[i];
2651 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2652 int k = 0;
2653 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2654 msleep(5);
2655 if (++k == 20)
2656 break;
2657 }
2658 }
2659 }
2660
2661 int ehea_stop_qps(struct net_device *dev)
2662 {
2663 struct ehea_port *port = netdev_priv(dev);
2664 struct ehea_adapter *adapter = port->adapter;
2665 struct hcp_modify_qp_cb0 *cb0;
2666 int ret = -EIO;
2667 int dret;
2668 int i;
2669 u64 hret;
2670 u64 dummy64 = 0;
2671 u16 dummy16 = 0;
2672
2673 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2674 if (!cb0) {
2675 ret = -ENOMEM;
2676 goto out;
2677 }
2678
2679 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2680 struct ehea_port_res *pr = &port->port_res[i];
2681 struct ehea_qp *qp = pr->qp;
2682
2683 /* Purge send queue */
2684 ehea_purge_sq(qp);
2685
2686 /* Disable queue pair */
2687 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2688 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2689 cb0);
2690 if (hret != H_SUCCESS) {
2691 ehea_error("query_ehea_qp failed (1)");
2692 goto out;
2693 }
2694
2695 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2696 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2697
2698 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2699 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2700 1), cb0, &dummy64,
2701 &dummy64, &dummy16, &dummy16);
2702 if (hret != H_SUCCESS) {
2703 ehea_error("modify_ehea_qp failed (1)");
2704 goto out;
2705 }
2706
2707 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2708 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2709 cb0);
2710 if (hret != H_SUCCESS) {
2711 ehea_error("query_ehea_qp failed (2)");
2712 goto out;
2713 }
2714
2715 /* deregister shared memory regions */
2716 dret = ehea_rem_smrs(pr);
2717 if (dret) {
2718 ehea_error("unreg shared memory region failed");
2719 goto out;
2720 }
2721 }
2722
2723 ret = 0;
2724 out:
2725 free_page((unsigned long)cb0);
2726
2727 return ret;
2728 }
2729
2730 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2731 {
2732 struct ehea_qp qp = *orig_qp;
2733 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2734 struct ehea_rwqe *rwqe;
2735 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2736 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2737 struct sk_buff *skb;
2738 u32 lkey = pr->recv_mr.lkey;
2739
2740
2741 int i;
2742 int index;
2743
2744 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2745 rwqe = ehea_get_next_rwqe(&qp, 2);
2746 rwqe->sg_list[0].l_key = lkey;
2747 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2748 skb = skba_rq2[index];
2749 if (skb)
2750 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2751 }
2752
2753 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2754 rwqe = ehea_get_next_rwqe(&qp, 3);
2755 rwqe->sg_list[0].l_key = lkey;
2756 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2757 skb = skba_rq3[index];
2758 if (skb)
2759 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2760 }
2761 }
2762
2763 int ehea_restart_qps(struct net_device *dev)
2764 {
2765 struct ehea_port *port = netdev_priv(dev);
2766 struct ehea_adapter *adapter = port->adapter;
2767 int ret = 0;
2768 int i;
2769
2770 struct hcp_modify_qp_cb0 *cb0;
2771 u64 hret;
2772 u64 dummy64 = 0;
2773 u16 dummy16 = 0;
2774
2775 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2776 if (!cb0) {
2777 ret = -ENOMEM;
2778 goto out;
2779 }
2780
2781 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2782 struct ehea_port_res *pr = &port->port_res[i];
2783 struct ehea_qp *qp = pr->qp;
2784
2785 ret = ehea_gen_smrs(pr);
2786 if (ret) {
2787 ehea_error("creation of shared memory regions failed");
2788 goto out;
2789 }
2790
2791 ehea_update_rqs(qp, pr);
2792
2793 /* Enable queue pair */
2794 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2795 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2796 cb0);
2797 if (hret != H_SUCCESS) {
2798 ehea_error("query_ehea_qp failed (1)");
2799 goto out;
2800 }
2801
2802 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2803 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2804
2805 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2806 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2807 1), cb0, &dummy64,
2808 &dummy64, &dummy16, &dummy16);
2809 if (hret != H_SUCCESS) {
2810 ehea_error("modify_ehea_qp failed (1)");
2811 goto out;
2812 }
2813
2814 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2815 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2816 cb0);
2817 if (hret != H_SUCCESS) {
2818 ehea_error("query_ehea_qp failed (2)");
2819 goto out;
2820 }
2821
2822 /* refill entire queue */
2823 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2824 ehea_refill_rq2(pr, 0);
2825 ehea_refill_rq3(pr, 0);
2826 }
2827 out:
2828 free_page((unsigned long)cb0);
2829
2830 return ret;
2831 }
2832
2833 static void ehea_reset_port(struct work_struct *work)
2834 {
2835 int ret;
2836 struct ehea_port *port =
2837 container_of(work, struct ehea_port, reset_task);
2838 struct net_device *dev = port->netdev;
2839
2840 port->resets++;
2841 mutex_lock(&port->port_lock);
2842 netif_stop_queue(dev);
2843
2844 port_napi_disable(port);
2845
2846 ehea_down(dev);
2847
2848 ret = ehea_up(dev);
2849 if (ret)
2850 goto out;
2851
2852 ehea_set_multicast_list(dev);
2853
2854 if (netif_msg_timer(port))
2855 ehea_info("Device %s resetted successfully", dev->name);
2856
2857 port_napi_enable(port);
2858
2859 netif_wake_queue(dev);
2860 out:
2861 mutex_unlock(&port->port_lock);
2862 return;
2863 }
2864
2865 static void ehea_rereg_mrs(struct work_struct *work)
2866 {
2867 int ret, i;
2868 struct ehea_adapter *adapter;
2869
2870 mutex_lock(&dlpar_mem_lock);
2871 ehea_info("LPAR memory changed - re-initializing driver");
2872
2873 list_for_each_entry(adapter, &adapter_list, list)
2874 if (adapter->active_ports) {
2875 /* Shutdown all ports */
2876 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2877 struct ehea_port *port = adapter->port[i];
2878 struct net_device *dev;
2879
2880 if (!port)
2881 continue;
2882
2883 dev = port->netdev;
2884
2885 if (dev->flags & IFF_UP) {
2886 mutex_lock(&port->port_lock);
2887 netif_stop_queue(dev);
2888 ehea_flush_sq(port);
2889 ret = ehea_stop_qps(dev);
2890 if (ret) {
2891 mutex_unlock(&port->port_lock);
2892 goto out;
2893 }
2894 port_napi_disable(port);
2895 mutex_unlock(&port->port_lock);
2896 }
2897 }
2898
2899 /* Unregister old memory region */
2900 ret = ehea_rem_mr(&adapter->mr);
2901 if (ret) {
2902 ehea_error("unregister MR failed - driver"
2903 " inoperable!");
2904 goto out;
2905 }
2906 }
2907
2908 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2909
2910 list_for_each_entry(adapter, &adapter_list, list)
2911 if (adapter->active_ports) {
2912 /* Register new memory region */
2913 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2914 if (ret) {
2915 ehea_error("register MR failed - driver"
2916 " inoperable!");
2917 goto out;
2918 }
2919
2920 /* Restart all ports */
2921 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2922 struct ehea_port *port = adapter->port[i];
2923
2924 if (port) {
2925 struct net_device *dev = port->netdev;
2926
2927 if (dev->flags & IFF_UP) {
2928 mutex_lock(&port->port_lock);
2929 port_napi_enable(port);
2930 ret = ehea_restart_qps(dev);
2931 if (!ret)
2932 netif_wake_queue(dev);
2933 mutex_unlock(&port->port_lock);
2934 }
2935 }
2936 }
2937 }
2938 ehea_info("re-initializing driver complete");
2939 out:
2940 mutex_unlock(&dlpar_mem_lock);
2941 return;
2942 }
2943
2944 static void ehea_tx_watchdog(struct net_device *dev)
2945 {
2946 struct ehea_port *port = netdev_priv(dev);
2947
2948 if (netif_carrier_ok(dev) &&
2949 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2950 ehea_schedule_port_reset(port);
2951 }
2952
2953 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2954 {
2955 struct hcp_query_ehea *cb;
2956 u64 hret;
2957 int ret;
2958
2959 cb = (void *)get_zeroed_page(GFP_KERNEL);
2960 if (!cb) {
2961 ret = -ENOMEM;
2962 goto out;
2963 }
2964
2965 hret = ehea_h_query_ehea(adapter->handle, cb);
2966
2967 if (hret != H_SUCCESS) {
2968 ret = -EIO;
2969 goto out_herr;
2970 }
2971
2972 adapter->max_mc_mac = cb->max_mc_mac - 1;
2973 ret = 0;
2974
2975 out_herr:
2976 free_page((unsigned long)cb);
2977 out:
2978 return ret;
2979 }
2980
2981 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2982 {
2983 struct hcp_ehea_port_cb4 *cb4;
2984 u64 hret;
2985 int ret = 0;
2986
2987 *jumbo = 0;
2988
2989 /* (Try to) enable *jumbo frames */
2990 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2991 if (!cb4) {
2992 ehea_error("no mem for cb4");
2993 ret = -ENOMEM;
2994 goto out;
2995 } else {
2996 hret = ehea_h_query_ehea_port(port->adapter->handle,
2997 port->logical_port_id,
2998 H_PORT_CB4,
2999 H_PORT_CB4_JUMBO, cb4);
3000 if (hret == H_SUCCESS) {
3001 if (cb4->jumbo_frame)
3002 *jumbo = 1;
3003 else {
3004 cb4->jumbo_frame = 1;
3005 hret = ehea_h_modify_ehea_port(port->adapter->
3006 handle,
3007 port->
3008 logical_port_id,
3009 H_PORT_CB4,
3010 H_PORT_CB4_JUMBO,
3011 cb4);
3012 if (hret == H_SUCCESS)
3013 *jumbo = 1;
3014 }
3015 } else
3016 ret = -EINVAL;
3017
3018 free_page((unsigned long)cb4);
3019 }
3020 out:
3021 return ret;
3022 }
3023
3024 static ssize_t ehea_show_port_id(struct device *dev,
3025 struct device_attribute *attr, char *buf)
3026 {
3027 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3028 return sprintf(buf, "%d", port->logical_port_id);
3029 }
3030
3031 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3032 NULL);
3033
3034 static void __devinit logical_port_release(struct device *dev)
3035 {
3036 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3037 of_node_put(port->ofdev.node);
3038 }
3039
3040 static struct device *ehea_register_port(struct ehea_port *port,
3041 struct device_node *dn)
3042 {
3043 int ret;
3044
3045 port->ofdev.node = of_node_get(dn);
3046 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3047 port->ofdev.dev.bus = &ibmebus_bus_type;
3048
3049 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3050 port->ofdev.dev.release = logical_port_release;
3051
3052 ret = of_device_register(&port->ofdev);
3053 if (ret) {
3054 ehea_error("failed to register device. ret=%d", ret);
3055 goto out;
3056 }
3057
3058 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3059 if (ret) {
3060 ehea_error("failed to register attributes, ret=%d", ret);
3061 goto out_unreg_of_dev;
3062 }
3063
3064 return &port->ofdev.dev;
3065
3066 out_unreg_of_dev:
3067 of_device_unregister(&port->ofdev);
3068 out:
3069 return NULL;
3070 }
3071
3072 static void ehea_unregister_port(struct ehea_port *port)
3073 {
3074 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3075 of_device_unregister(&port->ofdev);
3076 }
3077
3078 static const struct net_device_ops ehea_netdev_ops = {
3079 .ndo_open = ehea_open,
3080 .ndo_stop = ehea_stop,
3081 .ndo_start_xmit = ehea_start_xmit,
3082 #ifdef CONFIG_NET_POLL_CONTROLLER
3083 .ndo_poll_controller = ehea_netpoll,
3084 #endif
3085 .ndo_get_stats = ehea_get_stats,
3086 .ndo_set_mac_address = ehea_set_mac_addr,
3087 .ndo_validate_addr = eth_validate_addr,
3088 .ndo_set_multicast_list = ehea_set_multicast_list,
3089 .ndo_change_mtu = ehea_change_mtu,
3090 .ndo_vlan_rx_register = ehea_vlan_rx_register,
3091 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
3092 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
3093 .ndo_tx_timeout = ehea_tx_watchdog,
3094 };
3095
3096 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3097 u32 logical_port_id,
3098 struct device_node *dn)
3099 {
3100 int ret;
3101 struct net_device *dev;
3102 struct ehea_port *port;
3103 struct device *port_dev;
3104 int jumbo;
3105
3106 /* allocate memory for the port structures */
3107 dev = alloc_etherdev(sizeof(struct ehea_port));
3108
3109 if (!dev) {
3110 ehea_error("no mem for net_device");
3111 ret = -ENOMEM;
3112 goto out_err;
3113 }
3114
3115 port = netdev_priv(dev);
3116
3117 mutex_init(&port->port_lock);
3118 port->state = EHEA_PORT_DOWN;
3119 port->sig_comp_iv = sq_entries / 10;
3120
3121 port->adapter = adapter;
3122 port->netdev = dev;
3123 port->logical_port_id = logical_port_id;
3124
3125 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3126
3127 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3128 if (!port->mc_list) {
3129 ret = -ENOMEM;
3130 goto out_free_ethdev;
3131 }
3132
3133 INIT_LIST_HEAD(&port->mc_list->list);
3134
3135 ret = ehea_sense_port_attr(port);
3136 if (ret)
3137 goto out_free_mc_list;
3138
3139 port_dev = ehea_register_port(port, dn);
3140 if (!port_dev)
3141 goto out_free_mc_list;
3142
3143 SET_NETDEV_DEV(dev, port_dev);
3144
3145 /* initialize net_device structure */
3146 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3147
3148 dev->netdev_ops = &ehea_netdev_ops;
3149 ehea_set_ethtool_ops(dev);
3150
3151 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3152 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3153 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3154 | NETIF_F_LLTX;
3155 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3156
3157 INIT_WORK(&port->reset_task, ehea_reset_port);
3158
3159 ret = register_netdev(dev);
3160 if (ret) {
3161 ehea_error("register_netdev failed. ret=%d", ret);
3162 goto out_unreg_port;
3163 }
3164
3165 port->lro_max_aggr = lro_max_aggr;
3166
3167 ret = ehea_get_jumboframe_status(port, &jumbo);
3168 if (ret)
3169 ehea_error("failed determining jumbo frame status for %s",
3170 port->netdev->name);
3171
3172 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3173 jumbo == 1 ? "en" : "dis");
3174
3175 adapter->active_ports++;
3176
3177 return port;
3178
3179 out_unreg_port:
3180 ehea_unregister_port(port);
3181
3182 out_free_mc_list:
3183 kfree(port->mc_list);
3184
3185 out_free_ethdev:
3186 free_netdev(dev);
3187
3188 out_err:
3189 ehea_error("setting up logical port with id=%d failed, ret=%d",
3190 logical_port_id, ret);
3191 return NULL;
3192 }
3193
3194 static void ehea_shutdown_single_port(struct ehea_port *port)
3195 {
3196 struct ehea_adapter *adapter = port->adapter;
3197 unregister_netdev(port->netdev);
3198 ehea_unregister_port(port);
3199 kfree(port->mc_list);
3200 free_netdev(port->netdev);
3201 adapter->active_ports--;
3202 }
3203
3204 static int ehea_setup_ports(struct ehea_adapter *adapter)
3205 {
3206 struct device_node *lhea_dn;
3207 struct device_node *eth_dn = NULL;
3208
3209 const u32 *dn_log_port_id;
3210 int i = 0;
3211
3212 lhea_dn = adapter->ofdev->node;
3213 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3214
3215 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3216 NULL);
3217 if (!dn_log_port_id) {
3218 ehea_error("bad device node: eth_dn name=%s",
3219 eth_dn->full_name);
3220 continue;
3221 }
3222
3223 if (ehea_add_adapter_mr(adapter)) {
3224 ehea_error("creating MR failed");
3225 of_node_put(eth_dn);
3226 return -EIO;
3227 }
3228
3229 adapter->port[i] = ehea_setup_single_port(adapter,
3230 *dn_log_port_id,
3231 eth_dn);
3232 if (adapter->port[i])
3233 ehea_info("%s -> logical port id #%d",
3234 adapter->port[i]->netdev->name,
3235 *dn_log_port_id);
3236 else
3237 ehea_remove_adapter_mr(adapter);
3238
3239 i++;
3240 };
3241 return 0;
3242 }
3243
3244 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3245 u32 logical_port_id)
3246 {
3247 struct device_node *lhea_dn;
3248 struct device_node *eth_dn = NULL;
3249 const u32 *dn_log_port_id;
3250
3251 lhea_dn = adapter->ofdev->node;
3252 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3253
3254 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3255 NULL);
3256 if (dn_log_port_id)
3257 if (*dn_log_port_id == logical_port_id)
3258 return eth_dn;
3259 };
3260
3261 return NULL;
3262 }
3263
3264 static ssize_t ehea_probe_port(struct device *dev,
3265 struct device_attribute *attr,
3266 const char *buf, size_t count)
3267 {
3268 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3269 struct ehea_port *port;
3270 struct device_node *eth_dn = NULL;
3271 int i;
3272
3273 u32 logical_port_id;
3274
3275 sscanf(buf, "%d", &logical_port_id);
3276
3277 port = ehea_get_port(adapter, logical_port_id);
3278
3279 if (port) {
3280 ehea_info("adding port with logical port id=%d failed. port "
3281 "already configured as %s.", logical_port_id,
3282 port->netdev->name);
3283 return -EINVAL;
3284 }
3285
3286 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3287
3288 if (!eth_dn) {
3289 ehea_info("no logical port with id %d found", logical_port_id);
3290 return -EINVAL;
3291 }
3292
3293 if (ehea_add_adapter_mr(adapter)) {
3294 ehea_error("creating MR failed");
3295 return -EIO;
3296 }
3297
3298 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3299
3300 of_node_put(eth_dn);
3301
3302 if (port) {
3303 for (i = 0; i < EHEA_MAX_PORTS; i++)
3304 if (!adapter->port[i]) {
3305 adapter->port[i] = port;
3306 break;
3307 }
3308
3309 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3310 logical_port_id);
3311 } else {
3312 ehea_remove_adapter_mr(adapter);
3313 return -EIO;
3314 }
3315
3316 return (ssize_t) count;
3317 }
3318
3319 static ssize_t ehea_remove_port(struct device *dev,
3320 struct device_attribute *attr,
3321 const char *buf, size_t count)
3322 {
3323 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3324 struct ehea_port *port;
3325 int i;
3326 u32 logical_port_id;
3327
3328 sscanf(buf, "%d", &logical_port_id);
3329
3330 port = ehea_get_port(adapter, logical_port_id);
3331
3332 if (port) {
3333 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3334 logical_port_id);
3335
3336 ehea_shutdown_single_port(port);
3337
3338 for (i = 0; i < EHEA_MAX_PORTS; i++)
3339 if (adapter->port[i] == port) {
3340 adapter->port[i] = NULL;
3341 break;
3342 }
3343 } else {
3344 ehea_error("removing port with logical port id=%d failed. port "
3345 "not configured.", logical_port_id);
3346 return -EINVAL;
3347 }
3348
3349 ehea_remove_adapter_mr(adapter);
3350
3351 return (ssize_t) count;
3352 }
3353
3354 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3355 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3356
3357 int ehea_create_device_sysfs(struct of_device *dev)
3358 {
3359 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3360 if (ret)
3361 goto out;
3362
3363 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3364 out:
3365 return ret;
3366 }
3367
3368 void ehea_remove_device_sysfs(struct of_device *dev)
3369 {
3370 device_remove_file(&dev->dev, &dev_attr_probe_port);
3371 device_remove_file(&dev->dev, &dev_attr_remove_port);
3372 }
3373
3374 static int __devinit ehea_probe_adapter(struct of_device *dev,
3375 const struct of_device_id *id)
3376 {
3377 struct ehea_adapter *adapter;
3378 const u64 *adapter_handle;
3379 int ret;
3380
3381 if (!dev || !dev->node) {
3382 ehea_error("Invalid ibmebus device probed");
3383 return -EINVAL;
3384 }
3385
3386 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3387 if (!adapter) {
3388 ret = -ENOMEM;
3389 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3390 goto out;
3391 }
3392
3393 list_add(&adapter->list, &adapter_list);
3394
3395 adapter->ofdev = dev;
3396
3397 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3398 NULL);
3399 if (adapter_handle)
3400 adapter->handle = *adapter_handle;
3401
3402 if (!adapter->handle) {
3403 dev_err(&dev->dev, "failed getting handle for adapter"
3404 " '%s'\n", dev->node->full_name);
3405 ret = -ENODEV;
3406 goto out_free_ad;
3407 }
3408
3409 adapter->pd = EHEA_PD_ID;
3410
3411 dev_set_drvdata(&dev->dev, adapter);
3412
3413
3414 /* initialize adapter and ports */
3415 /* get adapter properties */
3416 ret = ehea_sense_adapter_attr(adapter);
3417 if (ret) {
3418 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3419 goto out_free_ad;
3420 }
3421
3422 adapter->neq = ehea_create_eq(adapter,
3423 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3424 if (!adapter->neq) {
3425 ret = -EIO;
3426 dev_err(&dev->dev, "NEQ creation failed\n");
3427 goto out_free_ad;
3428 }
3429
3430 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3431 (unsigned long)adapter);
3432
3433 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3434 ehea_interrupt_neq, IRQF_DISABLED,
3435 "ehea_neq", adapter);
3436 if (ret) {
3437 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3438 goto out_kill_eq;
3439 }
3440
3441 ret = ehea_create_device_sysfs(dev);
3442 if (ret)
3443 goto out_free_irq;
3444
3445 ret = ehea_setup_ports(adapter);
3446 if (ret) {
3447 dev_err(&dev->dev, "setup_ports failed\n");
3448 goto out_rem_dev_sysfs;
3449 }
3450
3451 ret = 0;
3452 goto out;
3453
3454 out_rem_dev_sysfs:
3455 ehea_remove_device_sysfs(dev);
3456
3457 out_free_irq:
3458 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3459
3460 out_kill_eq:
3461 ehea_destroy_eq(adapter->neq);
3462
3463 out_free_ad:
3464 list_del(&adapter->list);
3465 kfree(adapter);
3466
3467 out:
3468 ehea_update_firmware_handles();
3469
3470 return ret;
3471 }
3472
3473 static int __devexit ehea_remove(struct of_device *dev)
3474 {
3475 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3476 int i;
3477
3478 for (i = 0; i < EHEA_MAX_PORTS; i++)
3479 if (adapter->port[i]) {
3480 ehea_shutdown_single_port(adapter->port[i]);
3481 adapter->port[i] = NULL;
3482 }
3483
3484 ehea_remove_device_sysfs(dev);
3485
3486 flush_scheduled_work();
3487
3488 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3489 tasklet_kill(&adapter->neq_tasklet);
3490
3491 ehea_destroy_eq(adapter->neq);
3492 ehea_remove_adapter_mr(adapter);
3493 list_del(&adapter->list);
3494 kfree(adapter);
3495
3496 ehea_update_firmware_handles();
3497
3498 return 0;
3499 }
3500
3501 void ehea_crash_handler(void)
3502 {
3503 int i;
3504
3505 if (ehea_fw_handles.arr)
3506 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3507 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3508 ehea_fw_handles.arr[i].fwh,
3509 FORCE_FREE);
3510
3511 if (ehea_bcmc_regs.arr)
3512 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3513 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3514 ehea_bcmc_regs.arr[i].port_id,
3515 ehea_bcmc_regs.arr[i].reg_type,
3516 ehea_bcmc_regs.arr[i].macaddr,
3517 0, H_DEREG_BCMC);
3518 }
3519
3520 static int ehea_mem_notifier(struct notifier_block *nb,
3521 unsigned long action, void *data)
3522 {
3523 struct memory_notify *arg = data;
3524 switch (action) {
3525 case MEM_CANCEL_OFFLINE:
3526 ehea_info("memory offlining canceled");
3527 /* Readd canceled memory block */
3528 case MEM_ONLINE:
3529 ehea_info("memory is going online");
3530 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3531 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3532 return NOTIFY_BAD;
3533 ehea_rereg_mrs(NULL);
3534 break;
3535 case MEM_GOING_OFFLINE:
3536 ehea_info("memory is going offline");
3537 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3538 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3539 return NOTIFY_BAD;
3540 ehea_rereg_mrs(NULL);
3541 break;
3542 default:
3543 break;
3544 }
3545
3546 ehea_update_firmware_handles();
3547
3548 return NOTIFY_OK;
3549 }
3550
3551 static struct notifier_block ehea_mem_nb = {
3552 .notifier_call = ehea_mem_notifier,
3553 };
3554
3555 static int ehea_reboot_notifier(struct notifier_block *nb,
3556 unsigned long action, void *unused)
3557 {
3558 if (action == SYS_RESTART) {
3559 ehea_info("Reboot: freeing all eHEA resources");
3560 ibmebus_unregister_driver(&ehea_driver);
3561 }
3562 return NOTIFY_DONE;
3563 }
3564
3565 static struct notifier_block ehea_reboot_nb = {
3566 .notifier_call = ehea_reboot_notifier,
3567 };
3568
3569 static int check_module_parm(void)
3570 {
3571 int ret = 0;
3572
3573 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3574 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3575 ehea_info("Bad parameter: rq1_entries");
3576 ret = -EINVAL;
3577 }
3578 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3579 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3580 ehea_info("Bad parameter: rq2_entries");
3581 ret = -EINVAL;
3582 }
3583 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3584 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3585 ehea_info("Bad parameter: rq3_entries");
3586 ret = -EINVAL;
3587 }
3588 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3589 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3590 ehea_info("Bad parameter: sq_entries");
3591 ret = -EINVAL;
3592 }
3593
3594 return ret;
3595 }
3596
3597 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3598 char *buf)
3599 {
3600 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3601 }
3602
3603 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3604 ehea_show_capabilities, NULL);
3605
3606 int __init ehea_module_init(void)
3607 {
3608 int ret;
3609
3610 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3611 DRV_VERSION);
3612
3613
3614 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3615 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3616 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3617
3618 mutex_init(&ehea_fw_handles.lock);
3619 spin_lock_init(&ehea_bcmc_regs.lock);
3620
3621 ret = check_module_parm();
3622 if (ret)
3623 goto out;
3624
3625 ret = ehea_create_busmap();
3626 if (ret)
3627 goto out;
3628
3629 ret = register_reboot_notifier(&ehea_reboot_nb);
3630 if (ret)
3631 ehea_info("failed registering reboot notifier");
3632
3633 ret = register_memory_notifier(&ehea_mem_nb);
3634 if (ret)
3635 ehea_info("failed registering memory remove notifier");
3636
3637 ret = crash_shutdown_register(&ehea_crash_handler);
3638 if (ret)
3639 ehea_info("failed registering crash handler");
3640
3641 ret = ibmebus_register_driver(&ehea_driver);
3642 if (ret) {
3643 ehea_error("failed registering eHEA device driver on ebus");
3644 goto out2;
3645 }
3646
3647 ret = driver_create_file(&ehea_driver.driver,
3648 &driver_attr_capabilities);
3649 if (ret) {
3650 ehea_error("failed to register capabilities attribute, ret=%d",
3651 ret);
3652 goto out3;
3653 }
3654
3655 return ret;
3656
3657 out3:
3658 ibmebus_unregister_driver(&ehea_driver);
3659 out2:
3660 unregister_memory_notifier(&ehea_mem_nb);
3661 unregister_reboot_notifier(&ehea_reboot_nb);
3662 crash_shutdown_unregister(&ehea_crash_handler);
3663 out:
3664 return ret;
3665 }
3666
3667 static void __exit ehea_module_exit(void)
3668 {
3669 int ret;
3670
3671 flush_scheduled_work();
3672 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3673 ibmebus_unregister_driver(&ehea_driver);
3674 unregister_reboot_notifier(&ehea_reboot_nb);
3675 ret = crash_shutdown_unregister(&ehea_crash_handler);
3676 if (ret)
3677 ehea_info("failed unregistering crash handler");
3678 unregister_memory_notifier(&ehea_mem_nb);
3679 kfree(ehea_fw_handles.arr);
3680 kfree(ehea_bcmc_regs.arr);
3681 ehea_destroy_busmap();
3682 }
3683
3684 module_init(ehea_module_init);
3685 module_exit(ehea_module_exit);
Linux with added FPC-III support