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Merge remote-tracking branch 'cleancache/linux-next'
[linux-2.6/next.git] / drivers / net / ehea / ehea_main.c
bloba004bbcf72e60cdcc861ceda03a843814f8782be
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
31 #include <linux/in.h>
32 #include <linux/ip.h>
33 #include <linux/tcp.h>
34 #include <linux/udp.h>
35 #include <linux/if.h>
36 #include <linux/list.h>
37 #include <linux/slab.h>
38 #include <linux/if_ether.h>
39 #include <linux/notifier.h>
40 #include <linux/reboot.h>
41 #include <linux/memory.h>
42 #include <asm/kexec.h>
43 #include <linux/mutex.h>
44
45 #include <net/ip.h>
46
47 #include "ehea.h"
48 #include "ehea_qmr.h"
49 #include "ehea_phyp.h"
50
51
52 MODULE_LICENSE("GPL");
53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
54 MODULE_DESCRIPTION("IBM eServer HEA Driver");
55 MODULE_VERSION(DRV_VERSION);
56
57
58 static int msg_level = -1;
59 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
60 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
61 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
62 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
63 static int use_mcs;
64 static int use_lro;
65 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
66 static int num_tx_qps = EHEA_NUM_TX_QP;
67 static int prop_carrier_state;
68
69 module_param(msg_level, int, 0);
70 module_param(rq1_entries, int, 0);
71 module_param(rq2_entries, int, 0);
72 module_param(rq3_entries, int, 0);
73 module_param(sq_entries, int, 0);
74 module_param(prop_carrier_state, int, 0);
75 module_param(use_mcs, int, 0);
76 module_param(use_lro, int, 0);
77 module_param(lro_max_aggr, int, 0);
78 module_param(num_tx_qps, int, 0);
79
80 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
81 MODULE_PARM_DESC(msg_level, "msg_level");
82 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
83 "port to stack. 1:yes, 0:no. Default = 0 ");
84 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
85 "[2^x - 1], x = [6..14]. Default = "
86 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
87 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
88 "[2^x - 1], x = [6..14]. Default = "
89 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
90 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
91 "[2^x - 1], x = [6..14]. Default = "
92 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
93 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
94 "[2^x - 1], x = [6..14]. Default = "
95 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
96 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
97
98 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
99 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
100 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
101 "Default = 0");
102
103 static int port_name_cnt;
104 static LIST_HEAD(adapter_list);
105 static unsigned long ehea_driver_flags;
106 static DEFINE_MUTEX(dlpar_mem_lock);
107 struct ehea_fw_handle_array ehea_fw_handles;
108 struct ehea_bcmc_reg_array ehea_bcmc_regs;
109
110
111 static int __devinit ehea_probe_adapter(struct platform_device *dev,
112 const struct of_device_id *id);
113
114 static int __devexit ehea_remove(struct platform_device *dev);
115
116 static struct of_device_id ehea_device_table[] = {
117 {
118 .name = "lhea",
119 .compatible = "IBM,lhea",
120 },
121 {},
122 };
123 MODULE_DEVICE_TABLE(of, ehea_device_table);
124
125 static struct of_platform_driver ehea_driver = {
126 .driver = {
127 .name = "ehea",
128 .owner = THIS_MODULE,
129 .of_match_table = ehea_device_table,
130 },
131 .probe = ehea_probe_adapter,
132 .remove = ehea_remove,
133 };
134
135 void ehea_dump(void *adr, int len, char *msg)
136 {
137 int x;
138 unsigned char *deb = adr;
139 for (x = 0; x < len; x += 16) {
140 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
141 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
142 deb += 16;
143 }
144 }
145
146 void ehea_schedule_port_reset(struct ehea_port *port)
147 {
148 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
149 schedule_work(&port->reset_task);
150 }
151
152 static void ehea_update_firmware_handles(void)
153 {
154 struct ehea_fw_handle_entry *arr = NULL;
155 struct ehea_adapter *adapter;
156 int num_adapters = 0;
157 int num_ports = 0;
158 int num_portres = 0;
159 int i = 0;
160 int num_fw_handles, k, l;
161
162 /* Determine number of handles */
163 mutex_lock(&ehea_fw_handles.lock);
164
165 list_for_each_entry(adapter, &adapter_list, list) {
166 num_adapters++;
167
168 for (k = 0; k < EHEA_MAX_PORTS; k++) {
169 struct ehea_port *port = adapter->port[k];
170
171 if (!port || (port->state != EHEA_PORT_UP))
172 continue;
173
174 num_ports++;
175 num_portres += port->num_def_qps + port->num_add_tx_qps;
176 }
177 }
178
179 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
180 num_ports * EHEA_NUM_PORT_FW_HANDLES +
181 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
182
183 if (num_fw_handles) {
184 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
185 if (!arr)
186 goto out; /* Keep the existing array */
187 } else
188 goto out_update;
189
190 list_for_each_entry(adapter, &adapter_list, list) {
191 if (num_adapters == 0)
192 break;
193
194 for (k = 0; k < EHEA_MAX_PORTS; k++) {
195 struct ehea_port *port = adapter->port[k];
196
197 if (!port || (port->state != EHEA_PORT_UP) ||
198 (num_ports == 0))
199 continue;
200
201 for (l = 0;
202 l < port->num_def_qps + port->num_add_tx_qps;
203 l++) {
204 struct ehea_port_res *pr = &port->port_res[l];
205
206 arr[i].adh = adapter->handle;
207 arr[i++].fwh = pr->qp->fw_handle;
208 arr[i].adh = adapter->handle;
209 arr[i++].fwh = pr->send_cq->fw_handle;
210 arr[i].adh = adapter->handle;
211 arr[i++].fwh = pr->recv_cq->fw_handle;
212 arr[i].adh = adapter->handle;
213 arr[i++].fwh = pr->eq->fw_handle;
214 arr[i].adh = adapter->handle;
215 arr[i++].fwh = pr->send_mr.handle;
216 arr[i].adh = adapter->handle;
217 arr[i++].fwh = pr->recv_mr.handle;
218 }
219 arr[i].adh = adapter->handle;
220 arr[i++].fwh = port->qp_eq->fw_handle;
221 num_ports--;
222 }
223
224 arr[i].adh = adapter->handle;
225 arr[i++].fwh = adapter->neq->fw_handle;
226
227 if (adapter->mr.handle) {
228 arr[i].adh = adapter->handle;
229 arr[i++].fwh = adapter->mr.handle;
230 }
231 num_adapters--;
232 }
233
234 out_update:
235 kfree(ehea_fw_handles.arr);
236 ehea_fw_handles.arr = arr;
237 ehea_fw_handles.num_entries = i;
238 out:
239 mutex_unlock(&ehea_fw_handles.lock);
240 }
241
242 static void ehea_update_bcmc_registrations(void)
243 {
244 unsigned long flags;
245 struct ehea_bcmc_reg_entry *arr = NULL;
246 struct ehea_adapter *adapter;
247 struct ehea_mc_list *mc_entry;
248 int num_registrations = 0;
249 int i = 0;
250 int k;
251
252 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
253
254 /* Determine number of registrations */
255 list_for_each_entry(adapter, &adapter_list, list)
256 for (k = 0; k < EHEA_MAX_PORTS; k++) {
257 struct ehea_port *port = adapter->port[k];
258
259 if (!port || (port->state != EHEA_PORT_UP))
260 continue;
261
262 num_registrations += 2; /* Broadcast registrations */
263
264 list_for_each_entry(mc_entry, &port->mc_list->list,list)
265 num_registrations += 2;
266 }
267
268 if (num_registrations) {
269 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
270 if (!arr)
271 goto out; /* Keep the existing array */
272 } else
273 goto out_update;
274
275 list_for_each_entry(adapter, &adapter_list, list) {
276 for (k = 0; k < EHEA_MAX_PORTS; k++) {
277 struct ehea_port *port = adapter->port[k];
278
279 if (!port || (port->state != EHEA_PORT_UP))
280 continue;
281
282 if (num_registrations == 0)
283 goto out_update;
284
285 arr[i].adh = adapter->handle;
286 arr[i].port_id = port->logical_port_id;
287 arr[i].reg_type = EHEA_BCMC_BROADCAST |
288 EHEA_BCMC_UNTAGGED;
289 arr[i++].macaddr = port->mac_addr;
290
291 arr[i].adh = adapter->handle;
292 arr[i].port_id = port->logical_port_id;
293 arr[i].reg_type = EHEA_BCMC_BROADCAST |
294 EHEA_BCMC_VLANID_ALL;
295 arr[i++].macaddr = port->mac_addr;
296 num_registrations -= 2;
297
298 list_for_each_entry(mc_entry,
299 &port->mc_list->list, list) {
300 if (num_registrations == 0)
301 goto out_update;
302
303 arr[i].adh = adapter->handle;
304 arr[i].port_id = port->logical_port_id;
305 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
306 EHEA_BCMC_MULTICAST |
307 EHEA_BCMC_UNTAGGED;
308 arr[i++].macaddr = mc_entry->macaddr;
309
310 arr[i].adh = adapter->handle;
311 arr[i].port_id = port->logical_port_id;
312 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
313 EHEA_BCMC_MULTICAST |
314 EHEA_BCMC_VLANID_ALL;
315 arr[i++].macaddr = mc_entry->macaddr;
316 num_registrations -= 2;
317 }
318 }
319 }
320
321 out_update:
322 kfree(ehea_bcmc_regs.arr);
323 ehea_bcmc_regs.arr = arr;
324 ehea_bcmc_regs.num_entries = i;
325 out:
326 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
327 }
328
329 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
330 {
331 struct ehea_port *port = netdev_priv(dev);
332 struct net_device_stats *stats = &port->stats;
333 struct hcp_ehea_port_cb2 *cb2;
334 u64 hret, rx_packets, tx_packets, rx_bytes = 0, tx_bytes = 0;
335 int i;
336
337 memset(stats, 0, sizeof(*stats));
338
339 cb2 = (void *)get_zeroed_page(GFP_KERNEL);
340 if (!cb2) {
341 netdev_err(dev, "no mem for cb2\n");
342 goto out;
343 }
344
345 hret = ehea_h_query_ehea_port(port->adapter->handle,
346 port->logical_port_id,
347 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
348 if (hret != H_SUCCESS) {
349 netdev_err(dev, "query_ehea_port failed\n");
350 goto out_herr;
351 }
352
353 if (netif_msg_hw(port))
354 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
355
356 rx_packets = 0;
357 for (i = 0; i < port->num_def_qps; i++) {
358 rx_packets += port->port_res[i].rx_packets;
359 rx_bytes += port->port_res[i].rx_bytes;
360 }
361
362 tx_packets = 0;
363 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
364 tx_packets += port->port_res[i].tx_packets;
365 tx_bytes += port->port_res[i].tx_bytes;
366 }
367
368 stats->tx_packets = tx_packets;
369 stats->multicast = cb2->rxmcp;
370 stats->rx_errors = cb2->rxuerr;
371 stats->rx_bytes = rx_bytes;
372 stats->tx_bytes = tx_bytes;
373 stats->rx_packets = rx_packets;
374
375 out_herr:
376 free_page((unsigned long)cb2);
377 out:
378 return stats;
379 }
380
381 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
382 {
383 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
384 struct net_device *dev = pr->port->netdev;
385 int max_index_mask = pr->rq1_skba.len - 1;
386 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
387 int adder = 0;
388 int i;
389
390 pr->rq1_skba.os_skbs = 0;
391
392 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
393 if (nr_of_wqes > 0)
394 pr->rq1_skba.index = index;
395 pr->rq1_skba.os_skbs = fill_wqes;
396 return;
397 }
398
399 for (i = 0; i < fill_wqes; i++) {
400 if (!skb_arr_rq1[index]) {
401 skb_arr_rq1[index] = netdev_alloc_skb(dev,
402 EHEA_L_PKT_SIZE);
403 if (!skb_arr_rq1[index]) {
404 netdev_info(dev, "Unable to allocate enough skb in the array\n");
405 pr->rq1_skba.os_skbs = fill_wqes - i;
406 break;
407 }
408 }
409 index--;
410 index &= max_index_mask;
411 adder++;
412 }
413
414 if (adder == 0)
415 return;
416
417 /* Ring doorbell */
418 ehea_update_rq1a(pr->qp, adder);
419 }
420
421 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
422 {
423 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
424 struct net_device *dev = pr->port->netdev;
425 int i;
426
427 if (nr_rq1a > pr->rq1_skba.len) {
428 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
429 return;
430 }
431
432 for (i = 0; i < nr_rq1a; i++) {
433 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
434 if (!skb_arr_rq1[i]) {
435 netdev_info(dev, "Not enough memory to allocate skb array\n");
436 break;
437 }
438 }
439 /* Ring doorbell */
440 ehea_update_rq1a(pr->qp, i - 1);
441 }
442
443 static int ehea_refill_rq_def(struct ehea_port_res *pr,
444 struct ehea_q_skb_arr *q_skba, int rq_nr,
445 int num_wqes, int wqe_type, int packet_size)
446 {
447 struct net_device *dev = pr->port->netdev;
448 struct ehea_qp *qp = pr->qp;
449 struct sk_buff **skb_arr = q_skba->arr;
450 struct ehea_rwqe *rwqe;
451 int i, index, max_index_mask, fill_wqes;
452 int adder = 0;
453 int ret = 0;
454
455 fill_wqes = q_skba->os_skbs + num_wqes;
456 q_skba->os_skbs = 0;
457
458 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
459 q_skba->os_skbs = fill_wqes;
460 return ret;
461 }
462
463 index = q_skba->index;
464 max_index_mask = q_skba->len - 1;
465 for (i = 0; i < fill_wqes; i++) {
466 u64 tmp_addr;
467 struct sk_buff *skb;
468
469 skb = netdev_alloc_skb_ip_align(dev, packet_size);
470 if (!skb) {
471 q_skba->os_skbs = fill_wqes - i;
472 if (q_skba->os_skbs == q_skba->len - 2) {
473 netdev_info(pr->port->netdev,
474 "rq%i ran dry - no mem for skb\n",
475 rq_nr);
476 ret = -ENOMEM;
477 }
478 break;
479 }
480
481 skb_arr[index] = skb;
482 tmp_addr = ehea_map_vaddr(skb->data);
483 if (tmp_addr == -1) {
484 dev_kfree_skb(skb);
485 q_skba->os_skbs = fill_wqes - i;
486 ret = 0;
487 break;
488 }
489
490 rwqe = ehea_get_next_rwqe(qp, rq_nr);
491 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
492 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
493 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
494 rwqe->sg_list[0].vaddr = tmp_addr;
495 rwqe->sg_list[0].len = packet_size;
496 rwqe->data_segments = 1;
497
498 index++;
499 index &= max_index_mask;
500 adder++;
501 }
502
503 q_skba->index = index;
504 if (adder == 0)
505 goto out;
506
507 /* Ring doorbell */
508 iosync();
509 if (rq_nr == 2)
510 ehea_update_rq2a(pr->qp, adder);
511 else
512 ehea_update_rq3a(pr->qp, adder);
513 out:
514 return ret;
515 }
516
517
518 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
519 {
520 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
521 nr_of_wqes, EHEA_RWQE2_TYPE,
522 EHEA_RQ2_PKT_SIZE);
523 }
524
525
526 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
527 {
528 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
529 nr_of_wqes, EHEA_RWQE3_TYPE,
530 EHEA_MAX_PACKET_SIZE);
531 }
532
533 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
534 {
535 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
536 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
537 return 0;
538 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
539 (cqe->header_length == 0))
540 return 0;
541 return -EINVAL;
542 }
543
544 static inline void ehea_fill_skb(struct net_device *dev,
545 struct sk_buff *skb, struct ehea_cqe *cqe)
546 {
547 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
548
549 skb_put(skb, length);
550 skb->protocol = eth_type_trans(skb, dev);
551
552 /* The packet was not an IPV4 packet so a complemented checksum was
553 calculated. The value is found in the Internet Checksum field. */
554 if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
555 skb->ip_summed = CHECKSUM_COMPLETE;
556 skb->csum = csum_unfold(~cqe->inet_checksum_value);
557 } else
558 skb->ip_summed = CHECKSUM_UNNECESSARY;
559 }
560
561 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
562 int arr_len,
563 struct ehea_cqe *cqe)
564 {
565 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
566 struct sk_buff *skb;
567 void *pref;
568 int x;
569
570 x = skb_index + 1;
571 x &= (arr_len - 1);
572
573 pref = skb_array[x];
574 if (pref) {
575 prefetchw(pref);
576 prefetchw(pref + EHEA_CACHE_LINE);
577
578 pref = (skb_array[x]->data);
579 prefetch(pref);
580 prefetch(pref + EHEA_CACHE_LINE);
581 prefetch(pref + EHEA_CACHE_LINE * 2);
582 prefetch(pref + EHEA_CACHE_LINE * 3);
583 }
584
585 skb = skb_array[skb_index];
586 skb_array[skb_index] = NULL;
587 return skb;
588 }
589
590 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
591 int arr_len, int wqe_index)
592 {
593 struct sk_buff *skb;
594 void *pref;
595 int x;
596
597 x = wqe_index + 1;
598 x &= (arr_len - 1);
599
600 pref = skb_array[x];
601 if (pref) {
602 prefetchw(pref);
603 prefetchw(pref + EHEA_CACHE_LINE);
604
605 pref = (skb_array[x]->data);
606 prefetchw(pref);
607 prefetchw(pref + EHEA_CACHE_LINE);
608 }
609
610 skb = skb_array[wqe_index];
611 skb_array[wqe_index] = NULL;
612 return skb;
613 }
614
615 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
616 struct ehea_cqe *cqe, int *processed_rq2,
617 int *processed_rq3)
618 {
619 struct sk_buff *skb;
620
621 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
622 pr->p_stats.err_tcp_cksum++;
623 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
624 pr->p_stats.err_ip_cksum++;
625 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
626 pr->p_stats.err_frame_crc++;
627
628 if (rq == 2) {
629 *processed_rq2 += 1;
630 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
631 dev_kfree_skb(skb);
632 } else if (rq == 3) {
633 *processed_rq3 += 1;
634 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
635 dev_kfree_skb(skb);
636 }
637
638 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
639 if (netif_msg_rx_err(pr->port)) {
640 pr_err("Critical receive error for QP %d. Resetting port.\n",
641 pr->qp->init_attr.qp_nr);
642 ehea_dump(cqe, sizeof(*cqe), "CQE");
643 }
644 ehea_schedule_port_reset(pr->port);
645 return 1;
646 }
647
648 return 0;
649 }
650
651 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
652 void **tcph, u64 *hdr_flags, void *priv)
653 {
654 struct ehea_cqe *cqe = priv;
655 unsigned int ip_len;
656 struct iphdr *iph;
657
658 /* non tcp/udp packets */
659 if (!cqe->header_length)
660 return -1;
661
662 /* non tcp packet */
663 skb_reset_network_header(skb);
664 iph = ip_hdr(skb);
665 if (iph->protocol != IPPROTO_TCP)
666 return -1;
667
668 ip_len = ip_hdrlen(skb);
669 skb_set_transport_header(skb, ip_len);
670 *tcph = tcp_hdr(skb);
671
672 /* check if ip header and tcp header are complete */
673 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
674 return -1;
675
676 *hdr_flags = LRO_IPV4 | LRO_TCP;
677 *iphdr = iph;
678
679 return 0;
680 }
681
682 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
683 struct sk_buff *skb)
684 {
685 int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
686 pr->port->vgrp);
687
688 if (skb->dev->features & NETIF_F_LRO) {
689 if (vlan_extracted)
690 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
691 pr->port->vgrp,
692 cqe->vlan_tag,
693 cqe);
694 else
695 lro_receive_skb(&pr->lro_mgr, skb, cqe);
696 } else {
697 if (vlan_extracted)
698 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
699 cqe->vlan_tag);
700 else
701 netif_receive_skb(skb);
702 }
703 }
704
705 static int ehea_proc_rwqes(struct net_device *dev,
706 struct ehea_port_res *pr,
707 int budget)
708 {
709 struct ehea_port *port = pr->port;
710 struct ehea_qp *qp = pr->qp;
711 struct ehea_cqe *cqe;
712 struct sk_buff *skb;
713 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
714 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
715 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
716 int skb_arr_rq1_len = pr->rq1_skba.len;
717 int skb_arr_rq2_len = pr->rq2_skba.len;
718 int skb_arr_rq3_len = pr->rq3_skba.len;
719 int processed, processed_rq1, processed_rq2, processed_rq3;
720 u64 processed_bytes = 0;
721 int wqe_index, last_wqe_index, rq, port_reset;
722
723 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
724 last_wqe_index = 0;
725
726 cqe = ehea_poll_rq1(qp, &wqe_index);
727 while ((processed < budget) && cqe) {
728 ehea_inc_rq1(qp);
729 processed_rq1++;
730 processed++;
731 if (netif_msg_rx_status(port))
732 ehea_dump(cqe, sizeof(*cqe), "CQE");
733
734 last_wqe_index = wqe_index;
735 rmb();
736 if (!ehea_check_cqe(cqe, &rq)) {
737 if (rq == 1) {
738 /* LL RQ1 */
739 skb = get_skb_by_index_ll(skb_arr_rq1,
740 skb_arr_rq1_len,
741 wqe_index);
742 if (unlikely(!skb)) {
743 netif_info(port, rx_err, dev,
744 "LL rq1: skb=NULL\n");
745
746 skb = netdev_alloc_skb(dev,
747 EHEA_L_PKT_SIZE);
748 if (!skb) {
749 netdev_err(dev, "Not enough memory to allocate skb\n");
750 break;
751 }
752 }
753 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
754 cqe->num_bytes_transfered - 4);
755 ehea_fill_skb(dev, skb, cqe);
756 } else if (rq == 2) {
757 /* RQ2 */
758 skb = get_skb_by_index(skb_arr_rq2,
759 skb_arr_rq2_len, cqe);
760 if (unlikely(!skb)) {
761 netif_err(port, rx_err, dev,
762 "rq2: skb=NULL\n");
763 break;
764 }
765 ehea_fill_skb(dev, skb, cqe);
766 processed_rq2++;
767 } else {
768 /* RQ3 */
769 skb = get_skb_by_index(skb_arr_rq3,
770 skb_arr_rq3_len, cqe);
771 if (unlikely(!skb)) {
772 netif_err(port, rx_err, dev,
773 "rq3: skb=NULL\n");
774 break;
775 }
776 ehea_fill_skb(dev, skb, cqe);
777 processed_rq3++;
778 }
779
780 processed_bytes += skb->len;
781 ehea_proc_skb(pr, cqe, skb);
782 } else {
783 pr->p_stats.poll_receive_errors++;
784 port_reset = ehea_treat_poll_error(pr, rq, cqe,
785 &processed_rq2,
786 &processed_rq3);
787 if (port_reset)
788 break;
789 }
790 cqe = ehea_poll_rq1(qp, &wqe_index);
791 }
792 if (dev->features & NETIF_F_LRO)
793 lro_flush_all(&pr->lro_mgr);
794
795 pr->rx_packets += processed;
796 pr->rx_bytes += processed_bytes;
797
798 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
799 ehea_refill_rq2(pr, processed_rq2);
800 ehea_refill_rq3(pr, processed_rq3);
801
802 return processed;
803 }
804
805 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
806
807 static void reset_sq_restart_flag(struct ehea_port *port)
808 {
809 int i;
810
811 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
812 struct ehea_port_res *pr = &port->port_res[i];
813 pr->sq_restart_flag = 0;
814 }
815 wake_up(&port->restart_wq);
816 }
817
818 static void check_sqs(struct ehea_port *port)
819 {
820 struct ehea_swqe *swqe;
821 int swqe_index;
822 int i, k;
823
824 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
825 struct ehea_port_res *pr = &port->port_res[i];
826 int ret;
827 k = 0;
828 swqe = ehea_get_swqe(pr->qp, &swqe_index);
829 memset(swqe, 0, SWQE_HEADER_SIZE);
830 atomic_dec(&pr->swqe_avail);
831
832 swqe->tx_control |= EHEA_SWQE_PURGE;
833 swqe->wr_id = SWQE_RESTART_CHECK;
834 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
835 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
836 swqe->immediate_data_length = 80;
837
838 ehea_post_swqe(pr->qp, swqe);
839
840 ret = wait_event_timeout(port->restart_wq,
841 pr->sq_restart_flag == 0,
842 msecs_to_jiffies(100));
843
844 if (!ret) {
845 pr_err("HW/SW queues out of sync\n");
846 ehea_schedule_port_reset(pr->port);
847 return;
848 }
849 }
850 }
851
852
853 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
854 {
855 struct sk_buff *skb;
856 struct ehea_cq *send_cq = pr->send_cq;
857 struct ehea_cqe *cqe;
858 int quota = my_quota;
859 int cqe_counter = 0;
860 int swqe_av = 0;
861 int index;
862 unsigned long flags;
863
864 cqe = ehea_poll_cq(send_cq);
865 while (cqe && (quota > 0)) {
866 ehea_inc_cq(send_cq);
867
868 cqe_counter++;
869 rmb();
870
871 if (cqe->wr_id == SWQE_RESTART_CHECK) {
872 pr->sq_restart_flag = 1;
873 swqe_av++;
874 break;
875 }
876
877 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
878 pr_err("Bad send completion status=0x%04X\n",
879 cqe->status);
880
881 if (netif_msg_tx_err(pr->port))
882 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
883
884 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
885 pr_err("Resetting port\n");
886 ehea_schedule_port_reset(pr->port);
887 break;
888 }
889 }
890
891 if (netif_msg_tx_done(pr->port))
892 ehea_dump(cqe, sizeof(*cqe), "CQE");
893
894 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
895 == EHEA_SWQE2_TYPE)) {
896
897 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
898 skb = pr->sq_skba.arr[index];
899 dev_kfree_skb(skb);
900 pr->sq_skba.arr[index] = NULL;
901 }
902
903 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
904 quota--;
905
906 cqe = ehea_poll_cq(send_cq);
907 }
908
909 ehea_update_feca(send_cq, cqe_counter);
910 atomic_add(swqe_av, &pr->swqe_avail);
911
912 spin_lock_irqsave(&pr->netif_queue, flags);
913
914 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
915 >= pr->swqe_refill_th)) {
916 netif_wake_queue(pr->port->netdev);
917 pr->queue_stopped = 0;
918 }
919 spin_unlock_irqrestore(&pr->netif_queue, flags);
920 wake_up(&pr->port->swqe_avail_wq);
921
922 return cqe;
923 }
924
925 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
926 #define EHEA_POLL_MAX_CQES 65535
927
928 static int ehea_poll(struct napi_struct *napi, int budget)
929 {
930 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
931 napi);
932 struct net_device *dev = pr->port->netdev;
933 struct ehea_cqe *cqe;
934 struct ehea_cqe *cqe_skb = NULL;
935 int force_irq, wqe_index;
936 int rx = 0;
937
938 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
939 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
940
941 if (!force_irq)
942 rx += ehea_proc_rwqes(dev, pr, budget - rx);
943
944 while ((rx != budget) || force_irq) {
945 pr->poll_counter = 0;
946 force_irq = 0;
947 napi_complete(napi);
948 ehea_reset_cq_ep(pr->recv_cq);
949 ehea_reset_cq_ep(pr->send_cq);
950 ehea_reset_cq_n1(pr->recv_cq);
951 ehea_reset_cq_n1(pr->send_cq);
952 rmb();
953 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
954 cqe_skb = ehea_poll_cq(pr->send_cq);
955
956 if (!cqe && !cqe_skb)
957 return rx;
958
959 if (!napi_reschedule(napi))
960 return rx;
961
962 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
963 rx += ehea_proc_rwqes(dev, pr, budget - rx);
964 }
965
966 pr->poll_counter++;
967 return rx;
968 }
969
970 #ifdef CONFIG_NET_POLL_CONTROLLER
971 static void ehea_netpoll(struct net_device *dev)
972 {
973 struct ehea_port *port = netdev_priv(dev);
974 int i;
975
976 for (i = 0; i < port->num_def_qps; i++)
977 napi_schedule(&port->port_res[i].napi);
978 }
979 #endif
980
981 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
982 {
983 struct ehea_port_res *pr = param;
984
985 napi_schedule(&pr->napi);
986
987 return IRQ_HANDLED;
988 }
989
990 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
991 {
992 struct ehea_port *port = param;
993 struct ehea_eqe *eqe;
994 struct ehea_qp *qp;
995 u32 qp_token;
996 u64 resource_type, aer, aerr;
997 int reset_port = 0;
998
999 eqe = ehea_poll_eq(port->qp_eq);
1000
1001 while (eqe) {
1002 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
1003 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
1004 eqe->entry, qp_token);
1005
1006 qp = port->port_res[qp_token].qp;
1007
1008 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1009 &aer, &aerr);
1010
1011 if (resource_type == EHEA_AER_RESTYPE_QP) {
1012 if ((aer & EHEA_AER_RESET_MASK) ||
1013 (aerr & EHEA_AERR_RESET_MASK))
1014 reset_port = 1;
1015 } else
1016 reset_port = 1; /* Reset in case of CQ or EQ error */
1017
1018 eqe = ehea_poll_eq(port->qp_eq);
1019 }
1020
1021 if (reset_port) {
1022 pr_err("Resetting port\n");
1023 ehea_schedule_port_reset(port);
1024 }
1025
1026 return IRQ_HANDLED;
1027 }
1028
1029 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1030 int logical_port)
1031 {
1032 int i;
1033
1034 for (i = 0; i < EHEA_MAX_PORTS; i++)
1035 if (adapter->port[i])
1036 if (adapter->port[i]->logical_port_id == logical_port)
1037 return adapter->port[i];
1038 return NULL;
1039 }
1040
1041 int ehea_sense_port_attr(struct ehea_port *port)
1042 {
1043 int ret;
1044 u64 hret;
1045 struct hcp_ehea_port_cb0 *cb0;
1046
1047 /* may be called via ehea_neq_tasklet() */
1048 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1049 if (!cb0) {
1050 pr_err("no mem for cb0\n");
1051 ret = -ENOMEM;
1052 goto out;
1053 }
1054
1055 hret = ehea_h_query_ehea_port(port->adapter->handle,
1056 port->logical_port_id, H_PORT_CB0,
1057 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1058 cb0);
1059 if (hret != H_SUCCESS) {
1060 ret = -EIO;
1061 goto out_free;
1062 }
1063
1064 /* MAC address */
1065 port->mac_addr = cb0->port_mac_addr << 16;
1066
1067 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1068 ret = -EADDRNOTAVAIL;
1069 goto out_free;
1070 }
1071
1072 /* Port speed */
1073 switch (cb0->port_speed) {
1074 case H_SPEED_10M_H:
1075 port->port_speed = EHEA_SPEED_10M;
1076 port->full_duplex = 0;
1077 break;
1078 case H_SPEED_10M_F:
1079 port->port_speed = EHEA_SPEED_10M;
1080 port->full_duplex = 1;
1081 break;
1082 case H_SPEED_100M_H:
1083 port->port_speed = EHEA_SPEED_100M;
1084 port->full_duplex = 0;
1085 break;
1086 case H_SPEED_100M_F:
1087 port->port_speed = EHEA_SPEED_100M;
1088 port->full_duplex = 1;
1089 break;
1090 case H_SPEED_1G_F:
1091 port->port_speed = EHEA_SPEED_1G;
1092 port->full_duplex = 1;
1093 break;
1094 case H_SPEED_10G_F:
1095 port->port_speed = EHEA_SPEED_10G;
1096 port->full_duplex = 1;
1097 break;
1098 default:
1099 port->port_speed = 0;
1100 port->full_duplex = 0;
1101 break;
1102 }
1103
1104 port->autoneg = 1;
1105 port->num_mcs = cb0->num_default_qps;
1106
1107 /* Number of default QPs */
1108 if (use_mcs)
1109 port->num_def_qps = cb0->num_default_qps;
1110 else
1111 port->num_def_qps = 1;
1112
1113 if (!port->num_def_qps) {
1114 ret = -EINVAL;
1115 goto out_free;
1116 }
1117
1118 port->num_tx_qps = num_tx_qps;
1119
1120 if (port->num_def_qps >= port->num_tx_qps)
1121 port->num_add_tx_qps = 0;
1122 else
1123 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1124
1125 ret = 0;
1126 out_free:
1127 if (ret || netif_msg_probe(port))
1128 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1129 free_page((unsigned long)cb0);
1130 out:
1131 return ret;
1132 }
1133
1134 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1135 {
1136 struct hcp_ehea_port_cb4 *cb4;
1137 u64 hret;
1138 int ret = 0;
1139
1140 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1141 if (!cb4) {
1142 pr_err("no mem for cb4\n");
1143 ret = -ENOMEM;
1144 goto out;
1145 }
1146
1147 cb4->port_speed = port_speed;
1148
1149 netif_carrier_off(port->netdev);
1150
1151 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1152 port->logical_port_id,
1153 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1154 if (hret == H_SUCCESS) {
1155 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1156
1157 hret = ehea_h_query_ehea_port(port->adapter->handle,
1158 port->logical_port_id,
1159 H_PORT_CB4, H_PORT_CB4_SPEED,
1160 cb4);
1161 if (hret == H_SUCCESS) {
1162 switch (cb4->port_speed) {
1163 case H_SPEED_10M_H:
1164 port->port_speed = EHEA_SPEED_10M;
1165 port->full_duplex = 0;
1166 break;
1167 case H_SPEED_10M_F:
1168 port->port_speed = EHEA_SPEED_10M;
1169 port->full_duplex = 1;
1170 break;
1171 case H_SPEED_100M_H:
1172 port->port_speed = EHEA_SPEED_100M;
1173 port->full_duplex = 0;
1174 break;
1175 case H_SPEED_100M_F:
1176 port->port_speed = EHEA_SPEED_100M;
1177 port->full_duplex = 1;
1178 break;
1179 case H_SPEED_1G_F:
1180 port->port_speed = EHEA_SPEED_1G;
1181 port->full_duplex = 1;
1182 break;
1183 case H_SPEED_10G_F:
1184 port->port_speed = EHEA_SPEED_10G;
1185 port->full_duplex = 1;
1186 break;
1187 default:
1188 port->port_speed = 0;
1189 port->full_duplex = 0;
1190 break;
1191 }
1192 } else {
1193 pr_err("Failed sensing port speed\n");
1194 ret = -EIO;
1195 }
1196 } else {
1197 if (hret == H_AUTHORITY) {
1198 pr_info("Hypervisor denied setting port speed\n");
1199 ret = -EPERM;
1200 } else {
1201 ret = -EIO;
1202 pr_err("Failed setting port speed\n");
1203 }
1204 }
1205 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1206 netif_carrier_on(port->netdev);
1207
1208 free_page((unsigned long)cb4);
1209 out:
1210 return ret;
1211 }
1212
1213 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1214 {
1215 int ret;
1216 u8 ec;
1217 u8 portnum;
1218 struct ehea_port *port;
1219 struct net_device *dev;
1220
1221 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1222 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1223 port = ehea_get_port(adapter, portnum);
1224 dev = port->netdev;
1225
1226 switch (ec) {
1227 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1228
1229 if (!port) {
1230 netdev_err(dev, "unknown portnum %x\n", portnum);
1231 break;
1232 }
1233
1234 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1235 if (!netif_carrier_ok(dev)) {
1236 ret = ehea_sense_port_attr(port);
1237 if (ret) {
1238 netdev_err(dev, "failed resensing port attributes\n");
1239 break;
1240 }
1241
1242 netif_info(port, link, dev,
1243 "Logical port up: %dMbps %s Duplex\n",
1244 port->port_speed,
1245 port->full_duplex == 1 ?
1246 "Full" : "Half");
1247
1248 netif_carrier_on(dev);
1249 netif_wake_queue(dev);
1250 }
1251 } else
1252 if (netif_carrier_ok(dev)) {
1253 netif_info(port, link, dev,
1254 "Logical port down\n");
1255 netif_carrier_off(dev);
1256 netif_stop_queue(dev);
1257 }
1258
1259 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1260 port->phy_link = EHEA_PHY_LINK_UP;
1261 netif_info(port, link, dev,
1262 "Physical port up\n");
1263 if (prop_carrier_state)
1264 netif_carrier_on(dev);
1265 } else {
1266 port->phy_link = EHEA_PHY_LINK_DOWN;
1267 netif_info(port, link, dev,
1268 "Physical port down\n");
1269 if (prop_carrier_state)
1270 netif_carrier_off(dev);
1271 }
1272
1273 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1274 netdev_info(dev,
1275 "External switch port is primary port\n");
1276 else
1277 netdev_info(dev,
1278 "External switch port is backup port\n");
1279
1280 break;
1281 case EHEA_EC_ADAPTER_MALFUNC:
1282 netdev_err(dev, "Adapter malfunction\n");
1283 break;
1284 case EHEA_EC_PORT_MALFUNC:
1285 netdev_info(dev, "Port malfunction\n");
1286 netif_carrier_off(dev);
1287 netif_stop_queue(dev);
1288 break;
1289 default:
1290 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1291 break;
1292 }
1293 }
1294
1295 static void ehea_neq_tasklet(unsigned long data)
1296 {
1297 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1298 struct ehea_eqe *eqe;
1299 u64 event_mask;
1300
1301 eqe = ehea_poll_eq(adapter->neq);
1302 pr_debug("eqe=%p\n", eqe);
1303
1304 while (eqe) {
1305 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1306 ehea_parse_eqe(adapter, eqe->entry);
1307 eqe = ehea_poll_eq(adapter->neq);
1308 pr_debug("next eqe=%p\n", eqe);
1309 }
1310
1311 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1312 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1313 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1314
1315 ehea_h_reset_events(adapter->handle,
1316 adapter->neq->fw_handle, event_mask);
1317 }
1318
1319 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1320 {
1321 struct ehea_adapter *adapter = param;
1322 tasklet_hi_schedule(&adapter->neq_tasklet);
1323 return IRQ_HANDLED;
1324 }
1325
1326
1327 static int ehea_fill_port_res(struct ehea_port_res *pr)
1328 {
1329 int ret;
1330 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1331
1332 ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1333
1334 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1335
1336 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1337
1338 return ret;
1339 }
1340
1341 static int ehea_reg_interrupts(struct net_device *dev)
1342 {
1343 struct ehea_port *port = netdev_priv(dev);
1344 struct ehea_port_res *pr;
1345 int i, ret;
1346
1347
1348 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1349 dev->name);
1350
1351 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1352 ehea_qp_aff_irq_handler,
1353 IRQF_DISABLED, port->int_aff_name, port);
1354 if (ret) {
1355 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1356 port->qp_eq->attr.ist1);
1357 goto out_free_qpeq;
1358 }
1359
1360 netif_info(port, ifup, dev,
1361 "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1362 port->qp_eq->attr.ist1);
1363
1364
1365 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1366 pr = &port->port_res[i];
1367 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1368 "%s-queue%d", dev->name, i);
1369 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1370 ehea_recv_irq_handler,
1371 IRQF_DISABLED, pr->int_send_name,
1372 pr);
1373 if (ret) {
1374 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1375 i, pr->eq->attr.ist1);
1376 goto out_free_req;
1377 }
1378 netif_info(port, ifup, dev,
1379 "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1380 pr->eq->attr.ist1, i);
1381 }
1382 out:
1383 return ret;
1384
1385
1386 out_free_req:
1387 while (--i >= 0) {
1388 u32 ist = port->port_res[i].eq->attr.ist1;
1389 ibmebus_free_irq(ist, &port->port_res[i]);
1390 }
1391
1392 out_free_qpeq:
1393 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1394 i = port->num_def_qps;
1395
1396 goto out;
1397
1398 }
1399
1400 static void ehea_free_interrupts(struct net_device *dev)
1401 {
1402 struct ehea_port *port = netdev_priv(dev);
1403 struct ehea_port_res *pr;
1404 int i;
1405
1406 /* send */
1407
1408 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1409 pr = &port->port_res[i];
1410 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1411 netif_info(port, intr, dev,
1412 "free send irq for res %d with handle 0x%X\n",
1413 i, pr->eq->attr.ist1);
1414 }
1415
1416 /* associated events */
1417 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1418 netif_info(port, intr, dev,
1419 "associated event interrupt for handle 0x%X freed\n",
1420 port->qp_eq->attr.ist1);
1421 }
1422
1423 static int ehea_configure_port(struct ehea_port *port)
1424 {
1425 int ret, i;
1426 u64 hret, mask;
1427 struct hcp_ehea_port_cb0 *cb0;
1428
1429 ret = -ENOMEM;
1430 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1431 if (!cb0)
1432 goto out;
1433
1434 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1435 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1436 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1437 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1438 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1439 PXLY_RC_VLAN_FILTER)
1440 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1441
1442 for (i = 0; i < port->num_mcs; i++)
1443 if (use_mcs)
1444 cb0->default_qpn_arr[i] =
1445 port->port_res[i].qp->init_attr.qp_nr;
1446 else
1447 cb0->default_qpn_arr[i] =
1448 port->port_res[0].qp->init_attr.qp_nr;
1449
1450 if (netif_msg_ifup(port))
1451 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1452
1453 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1454 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1455
1456 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1457 port->logical_port_id,
1458 H_PORT_CB0, mask, cb0);
1459 ret = -EIO;
1460 if (hret != H_SUCCESS)
1461 goto out_free;
1462
1463 ret = 0;
1464
1465 out_free:
1466 free_page((unsigned long)cb0);
1467 out:
1468 return ret;
1469 }
1470
1471 int ehea_gen_smrs(struct ehea_port_res *pr)
1472 {
1473 int ret;
1474 struct ehea_adapter *adapter = pr->port->adapter;
1475
1476 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1477 if (ret)
1478 goto out;
1479
1480 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1481 if (ret)
1482 goto out_free;
1483
1484 return 0;
1485
1486 out_free:
1487 ehea_rem_mr(&pr->send_mr);
1488 out:
1489 pr_err("Generating SMRS failed\n");
1490 return -EIO;
1491 }
1492
1493 int ehea_rem_smrs(struct ehea_port_res *pr)
1494 {
1495 if ((ehea_rem_mr(&pr->send_mr)) ||
1496 (ehea_rem_mr(&pr->recv_mr)))
1497 return -EIO;
1498 else
1499 return 0;
1500 }
1501
1502 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1503 {
1504 int arr_size = sizeof(void *) * max_q_entries;
1505
1506 q_skba->arr = vzalloc(arr_size);
1507 if (!q_skba->arr)
1508 return -ENOMEM;
1509
1510 q_skba->len = max_q_entries;
1511 q_skba->index = 0;
1512 q_skba->os_skbs = 0;
1513
1514 return 0;
1515 }
1516
1517 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1518 struct port_res_cfg *pr_cfg, int queue_token)
1519 {
1520 struct ehea_adapter *adapter = port->adapter;
1521 enum ehea_eq_type eq_type = EHEA_EQ;
1522 struct ehea_qp_init_attr *init_attr = NULL;
1523 int ret = -EIO;
1524 u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1525
1526 tx_bytes = pr->tx_bytes;
1527 tx_packets = pr->tx_packets;
1528 rx_bytes = pr->rx_bytes;
1529 rx_packets = pr->rx_packets;
1530
1531 memset(pr, 0, sizeof(struct ehea_port_res));
1532
1533 pr->tx_bytes = rx_bytes;
1534 pr->tx_packets = tx_packets;
1535 pr->rx_bytes = rx_bytes;
1536 pr->rx_packets = rx_packets;
1537
1538 pr->port = port;
1539 spin_lock_init(&pr->xmit_lock);
1540 spin_lock_init(&pr->netif_queue);
1541
1542 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1543 if (!pr->eq) {
1544 pr_err("create_eq failed (eq)\n");
1545 goto out_free;
1546 }
1547
1548 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1549 pr->eq->fw_handle,
1550 port->logical_port_id);
1551 if (!pr->recv_cq) {
1552 pr_err("create_cq failed (cq_recv)\n");
1553 goto out_free;
1554 }
1555
1556 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1557 pr->eq->fw_handle,
1558 port->logical_port_id);
1559 if (!pr->send_cq) {
1560 pr_err("create_cq failed (cq_send)\n");
1561 goto out_free;
1562 }
1563
1564 if (netif_msg_ifup(port))
1565 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1566 pr->send_cq->attr.act_nr_of_cqes,
1567 pr->recv_cq->attr.act_nr_of_cqes);
1568
1569 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1570 if (!init_attr) {
1571 ret = -ENOMEM;
1572 pr_err("no mem for ehea_qp_init_attr\n");
1573 goto out_free;
1574 }
1575
1576 init_attr->low_lat_rq1 = 1;
1577 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1578 init_attr->rq_count = 3;
1579 init_attr->qp_token = queue_token;
1580 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1581 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1582 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1583 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1584 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1585 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1586 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1587 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1588 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1589 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1590 init_attr->port_nr = port->logical_port_id;
1591 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1592 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1593 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1594
1595 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1596 if (!pr->qp) {
1597 pr_err("create_qp failed\n");
1598 ret = -EIO;
1599 goto out_free;
1600 }
1601
1602 if (netif_msg_ifup(port))
1603 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1604 init_attr->qp_nr,
1605 init_attr->act_nr_send_wqes,
1606 init_attr->act_nr_rwqes_rq1,
1607 init_attr->act_nr_rwqes_rq2,
1608 init_attr->act_nr_rwqes_rq3);
1609
1610 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1611
1612 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1613 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1614 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1615 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1616 if (ret)
1617 goto out_free;
1618
1619 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1620 if (ehea_gen_smrs(pr) != 0) {
1621 ret = -EIO;
1622 goto out_free;
1623 }
1624
1625 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1626
1627 kfree(init_attr);
1628
1629 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1630
1631 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1632 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1633 pr->lro_mgr.lro_arr = pr->lro_desc;
1634 pr->lro_mgr.get_skb_header = get_skb_hdr;
1635 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1636 pr->lro_mgr.dev = port->netdev;
1637 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1638 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1639
1640 ret = 0;
1641 goto out;
1642
1643 out_free:
1644 kfree(init_attr);
1645 vfree(pr->sq_skba.arr);
1646 vfree(pr->rq1_skba.arr);
1647 vfree(pr->rq2_skba.arr);
1648 vfree(pr->rq3_skba.arr);
1649 ehea_destroy_qp(pr->qp);
1650 ehea_destroy_cq(pr->send_cq);
1651 ehea_destroy_cq(pr->recv_cq);
1652 ehea_destroy_eq(pr->eq);
1653 out:
1654 return ret;
1655 }
1656
1657 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1658 {
1659 int ret, i;
1660
1661 if (pr->qp)
1662 netif_napi_del(&pr->napi);
1663
1664 ret = ehea_destroy_qp(pr->qp);
1665
1666 if (!ret) {
1667 ehea_destroy_cq(pr->send_cq);
1668 ehea_destroy_cq(pr->recv_cq);
1669 ehea_destroy_eq(pr->eq);
1670
1671 for (i = 0; i < pr->rq1_skba.len; i++)
1672 if (pr->rq1_skba.arr[i])
1673 dev_kfree_skb(pr->rq1_skba.arr[i]);
1674
1675 for (i = 0; i < pr->rq2_skba.len; i++)
1676 if (pr->rq2_skba.arr[i])
1677 dev_kfree_skb(pr->rq2_skba.arr[i]);
1678
1679 for (i = 0; i < pr->rq3_skba.len; i++)
1680 if (pr->rq3_skba.arr[i])
1681 dev_kfree_skb(pr->rq3_skba.arr[i]);
1682
1683 for (i = 0; i < pr->sq_skba.len; i++)
1684 if (pr->sq_skba.arr[i])
1685 dev_kfree_skb(pr->sq_skba.arr[i]);
1686
1687 vfree(pr->rq1_skba.arr);
1688 vfree(pr->rq2_skba.arr);
1689 vfree(pr->rq3_skba.arr);
1690 vfree(pr->sq_skba.arr);
1691 ret = ehea_rem_smrs(pr);
1692 }
1693 return ret;
1694 }
1695
1696 /*
1697 * The write_* functions store information in swqe which is used by
1698 * the hardware to calculate the ip/tcp/udp checksum
1699 */
1700
1701 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1702 const struct sk_buff *skb)
1703 {
1704 swqe->ip_start = skb_network_offset(skb);
1705 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1706 }
1707
1708 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1709 const struct sk_buff *skb)
1710 {
1711 swqe->tcp_offset =
1712 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1713
1714 swqe->tcp_end = (u16)skb->len - 1;
1715 }
1716
1717 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1718 const struct sk_buff *skb)
1719 {
1720 swqe->tcp_offset =
1721 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1722
1723 swqe->tcp_end = (u16)skb->len - 1;
1724 }
1725
1726
1727 static void write_swqe2_TSO(struct sk_buff *skb,
1728 struct ehea_swqe *swqe, u32 lkey)
1729 {
1730 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1731 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1732 int skb_data_size = skb_headlen(skb);
1733 int headersize;
1734
1735 /* Packet is TCP with TSO enabled */
1736 swqe->tx_control |= EHEA_SWQE_TSO;
1737 swqe->mss = skb_shinfo(skb)->gso_size;
1738 /* copy only eth/ip/tcp headers to immediate data and
1739 * the rest of skb->data to sg1entry
1740 */
1741 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1742
1743 skb_data_size = skb_headlen(skb);
1744
1745 if (skb_data_size >= headersize) {
1746 /* copy immediate data */
1747 skb_copy_from_linear_data(skb, imm_data, headersize);
1748 swqe->immediate_data_length = headersize;
1749
1750 if (skb_data_size > headersize) {
1751 /* set sg1entry data */
1752 sg1entry->l_key = lkey;
1753 sg1entry->len = skb_data_size - headersize;
1754 sg1entry->vaddr =
1755 ehea_map_vaddr(skb->data + headersize);
1756 swqe->descriptors++;
1757 }
1758 } else
1759 pr_err("cannot handle fragmented headers\n");
1760 }
1761
1762 static void write_swqe2_nonTSO(struct sk_buff *skb,
1763 struct ehea_swqe *swqe, u32 lkey)
1764 {
1765 int skb_data_size = skb_headlen(skb);
1766 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1767 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1768
1769 /* Packet is any nonTSO type
1770 *
1771 * Copy as much as possible skb->data to immediate data and
1772 * the rest to sg1entry
1773 */
1774 if (skb_data_size >= SWQE2_MAX_IMM) {
1775 /* copy immediate data */
1776 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1777
1778 swqe->immediate_data_length = SWQE2_MAX_IMM;
1779
1780 if (skb_data_size > SWQE2_MAX_IMM) {
1781 /* copy sg1entry data */
1782 sg1entry->l_key = lkey;
1783 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1784 sg1entry->vaddr =
1785 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1786 swqe->descriptors++;
1787 }
1788 } else {
1789 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1790 swqe->immediate_data_length = skb_data_size;
1791 }
1792 }
1793
1794 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1795 struct ehea_swqe *swqe, u32 lkey)
1796 {
1797 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1798 skb_frag_t *frag;
1799 int nfrags, sg1entry_contains_frag_data, i;
1800
1801 nfrags = skb_shinfo(skb)->nr_frags;
1802 sg1entry = &swqe->u.immdata_desc.sg_entry;
1803 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1804 swqe->descriptors = 0;
1805 sg1entry_contains_frag_data = 0;
1806
1807 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1808 write_swqe2_TSO(skb, swqe, lkey);
1809 else
1810 write_swqe2_nonTSO(skb, swqe, lkey);
1811
1812 /* write descriptors */
1813 if (nfrags > 0) {
1814 if (swqe->descriptors == 0) {
1815 /* sg1entry not yet used */
1816 frag = &skb_shinfo(skb)->frags[0];
1817
1818 /* copy sg1entry data */
1819 sg1entry->l_key = lkey;
1820 sg1entry->len = frag->size;
1821 sg1entry->vaddr =
1822 ehea_map_vaddr(page_address(frag->page)
1823 + frag->page_offset);
1824 swqe->descriptors++;
1825 sg1entry_contains_frag_data = 1;
1826 }
1827
1828 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1829
1830 frag = &skb_shinfo(skb)->frags[i];
1831 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1832
1833 sgentry->l_key = lkey;
1834 sgentry->len = frag->size;
1835 sgentry->vaddr =
1836 ehea_map_vaddr(page_address(frag->page)
1837 + frag->page_offset);
1838 swqe->descriptors++;
1839 }
1840 }
1841 }
1842
1843 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1844 {
1845 int ret = 0;
1846 u64 hret;
1847 u8 reg_type;
1848
1849 /* De/Register untagged packets */
1850 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1851 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1852 port->logical_port_id,
1853 reg_type, port->mac_addr, 0, hcallid);
1854 if (hret != H_SUCCESS) {
1855 pr_err("%sregistering bc address failed (tagged)\n",
1856 hcallid == H_REG_BCMC ? "" : "de");
1857 ret = -EIO;
1858 goto out_herr;
1859 }
1860
1861 /* De/Register VLAN packets */
1862 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1863 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1864 port->logical_port_id,
1865 reg_type, port->mac_addr, 0, hcallid);
1866 if (hret != H_SUCCESS) {
1867 pr_err("%sregistering bc address failed (vlan)\n",
1868 hcallid == H_REG_BCMC ? "" : "de");
1869 ret = -EIO;
1870 }
1871 out_herr:
1872 return ret;
1873 }
1874
1875 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1876 {
1877 struct ehea_port *port = netdev_priv(dev);
1878 struct sockaddr *mac_addr = sa;
1879 struct hcp_ehea_port_cb0 *cb0;
1880 int ret;
1881 u64 hret;
1882
1883 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1884 ret = -EADDRNOTAVAIL;
1885 goto out;
1886 }
1887
1888 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1889 if (!cb0) {
1890 pr_err("no mem for cb0\n");
1891 ret = -ENOMEM;
1892 goto out;
1893 }
1894
1895 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1896
1897 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1898
1899 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1900 port->logical_port_id, H_PORT_CB0,
1901 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1902 if (hret != H_SUCCESS) {
1903 ret = -EIO;
1904 goto out_free;
1905 }
1906
1907 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1908
1909 /* Deregister old MAC in pHYP */
1910 if (port->state == EHEA_PORT_UP) {
1911 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1912 if (ret)
1913 goto out_upregs;
1914 }
1915
1916 port->mac_addr = cb0->port_mac_addr << 16;
1917
1918 /* Register new MAC in pHYP */
1919 if (port->state == EHEA_PORT_UP) {
1920 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1921 if (ret)
1922 goto out_upregs;
1923 }
1924
1925 ret = 0;
1926
1927 out_upregs:
1928 ehea_update_bcmc_registrations();
1929 out_free:
1930 free_page((unsigned long)cb0);
1931 out:
1932 return ret;
1933 }
1934
1935 static void ehea_promiscuous_error(u64 hret, int enable)
1936 {
1937 if (hret == H_AUTHORITY)
1938 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1939 enable == 1 ? "en" : "dis");
1940 else
1941 pr_err("failed %sabling promiscuous mode\n",
1942 enable == 1 ? "en" : "dis");
1943 }
1944
1945 static void ehea_promiscuous(struct net_device *dev, int enable)
1946 {
1947 struct ehea_port *port = netdev_priv(dev);
1948 struct hcp_ehea_port_cb7 *cb7;
1949 u64 hret;
1950
1951 if (enable == port->promisc)
1952 return;
1953
1954 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1955 if (!cb7) {
1956 pr_err("no mem for cb7\n");
1957 goto out;
1958 }
1959
1960 /* Modify Pxs_DUCQPN in CB7 */
1961 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1962
1963 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1964 port->logical_port_id,
1965 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1966 if (hret) {
1967 ehea_promiscuous_error(hret, enable);
1968 goto out;
1969 }
1970
1971 port->promisc = enable;
1972 out:
1973 free_page((unsigned long)cb7);
1974 }
1975
1976 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1977 u32 hcallid)
1978 {
1979 u64 hret;
1980 u8 reg_type;
1981
1982 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1983 | EHEA_BCMC_UNTAGGED;
1984
1985 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1986 port->logical_port_id,
1987 reg_type, mc_mac_addr, 0, hcallid);
1988 if (hret)
1989 goto out;
1990
1991 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1992 | EHEA_BCMC_VLANID_ALL;
1993
1994 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1995 port->logical_port_id,
1996 reg_type, mc_mac_addr, 0, hcallid);
1997 out:
1998 return hret;
1999 }
2000
2001 static int ehea_drop_multicast_list(struct net_device *dev)
2002 {
2003 struct ehea_port *port = netdev_priv(dev);
2004 struct ehea_mc_list *mc_entry = port->mc_list;
2005 struct list_head *pos;
2006 struct list_head *temp;
2007 int ret = 0;
2008 u64 hret;
2009
2010 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2011 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2012
2013 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2014 H_DEREG_BCMC);
2015 if (hret) {
2016 pr_err("failed deregistering mcast MAC\n");
2017 ret = -EIO;
2018 }
2019
2020 list_del(pos);
2021 kfree(mc_entry);
2022 }
2023 return ret;
2024 }
2025
2026 static void ehea_allmulti(struct net_device *dev, int enable)
2027 {
2028 struct ehea_port *port = netdev_priv(dev);
2029 u64 hret;
2030
2031 if (!port->allmulti) {
2032 if (enable) {
2033 /* Enable ALLMULTI */
2034 ehea_drop_multicast_list(dev);
2035 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2036 if (!hret)
2037 port->allmulti = 1;
2038 else
2039 netdev_err(dev,
2040 "failed enabling IFF_ALLMULTI\n");
2041 }
2042 } else
2043 if (!enable) {
2044 /* Disable ALLMULTI */
2045 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2046 if (!hret)
2047 port->allmulti = 0;
2048 else
2049 netdev_err(dev,
2050 "failed disabling IFF_ALLMULTI\n");
2051 }
2052 }
2053
2054 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2055 {
2056 struct ehea_mc_list *ehea_mcl_entry;
2057 u64 hret;
2058
2059 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2060 if (!ehea_mcl_entry) {
2061 pr_err("no mem for mcl_entry\n");
2062 return;
2063 }
2064
2065 INIT_LIST_HEAD(&ehea_mcl_entry->list);
2066
2067 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2068
2069 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2070 H_REG_BCMC);
2071 if (!hret)
2072 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2073 else {
2074 pr_err("failed registering mcast MAC\n");
2075 kfree(ehea_mcl_entry);
2076 }
2077 }
2078
2079 static void ehea_set_multicast_list(struct net_device *dev)
2080 {
2081 struct ehea_port *port = netdev_priv(dev);
2082 struct netdev_hw_addr *ha;
2083 int ret;
2084
2085 if (dev->flags & IFF_PROMISC) {
2086 ehea_promiscuous(dev, 1);
2087 return;
2088 }
2089 ehea_promiscuous(dev, 0);
2090
2091 if (dev->flags & IFF_ALLMULTI) {
2092 ehea_allmulti(dev, 1);
2093 goto out;
2094 }
2095 ehea_allmulti(dev, 0);
2096
2097 if (!netdev_mc_empty(dev)) {
2098 ret = ehea_drop_multicast_list(dev);
2099 if (ret) {
2100 /* Dropping the current multicast list failed.
2101 * Enabling ALL_MULTI is the best we can do.
2102 */
2103 ehea_allmulti(dev, 1);
2104 }
2105
2106 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2107 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2108 port->adapter->max_mc_mac);
2109 goto out;
2110 }
2111
2112 netdev_for_each_mc_addr(ha, dev)
2113 ehea_add_multicast_entry(port, ha->addr);
2114
2115 }
2116 out:
2117 ehea_update_bcmc_registrations();
2118 }
2119
2120 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2121 {
2122 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2123 return -EINVAL;
2124 dev->mtu = new_mtu;
2125 return 0;
2126 }
2127
2128 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2129 struct ehea_swqe *swqe, u32 lkey)
2130 {
2131 if (skb->protocol == htons(ETH_P_IP)) {
2132 const struct iphdr *iph = ip_hdr(skb);
2133
2134 /* IPv4 */
2135 swqe->tx_control |= EHEA_SWQE_CRC
2136 | EHEA_SWQE_IP_CHECKSUM
2137 | EHEA_SWQE_TCP_CHECKSUM
2138 | EHEA_SWQE_IMM_DATA_PRESENT
2139 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2140
2141 write_ip_start_end(swqe, skb);
2142
2143 if (iph->protocol == IPPROTO_UDP) {
2144 if ((iph->frag_off & IP_MF) ||
2145 (iph->frag_off & IP_OFFSET))
2146 /* IP fragment, so don't change cs */
2147 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2148 else
2149 write_udp_offset_end(swqe, skb);
2150 } else if (iph->protocol == IPPROTO_TCP) {
2151 write_tcp_offset_end(swqe, skb);
2152 }
2153
2154 /* icmp (big data) and ip segmentation packets (all other ip
2155 packets) do not require any special handling */
2156
2157 } else {
2158 /* Other Ethernet Protocol */
2159 swqe->tx_control |= EHEA_SWQE_CRC
2160 | EHEA_SWQE_IMM_DATA_PRESENT
2161 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2162 }
2163
2164 write_swqe2_data(skb, dev, swqe, lkey);
2165 }
2166
2167 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2168 struct ehea_swqe *swqe)
2169 {
2170 int nfrags = skb_shinfo(skb)->nr_frags;
2171 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2172 skb_frag_t *frag;
2173 int i;
2174
2175 if (skb->protocol == htons(ETH_P_IP)) {
2176 const struct iphdr *iph = ip_hdr(skb);
2177
2178 /* IPv4 */
2179 write_ip_start_end(swqe, skb);
2180
2181 if (iph->protocol == IPPROTO_TCP) {
2182 swqe->tx_control |= EHEA_SWQE_CRC
2183 | EHEA_SWQE_IP_CHECKSUM
2184 | EHEA_SWQE_TCP_CHECKSUM
2185 | EHEA_SWQE_IMM_DATA_PRESENT;
2186
2187 write_tcp_offset_end(swqe, skb);
2188
2189 } else if (iph->protocol == IPPROTO_UDP) {
2190 if ((iph->frag_off & IP_MF) ||
2191 (iph->frag_off & IP_OFFSET))
2192 /* IP fragment, so don't change cs */
2193 swqe->tx_control |= EHEA_SWQE_CRC
2194 | EHEA_SWQE_IMM_DATA_PRESENT;
2195 else {
2196 swqe->tx_control |= EHEA_SWQE_CRC
2197 | EHEA_SWQE_IP_CHECKSUM
2198 | EHEA_SWQE_TCP_CHECKSUM
2199 | EHEA_SWQE_IMM_DATA_PRESENT;
2200
2201 write_udp_offset_end(swqe, skb);
2202 }
2203 } else {
2204 /* icmp (big data) and
2205 ip segmentation packets (all other ip packets) */
2206 swqe->tx_control |= EHEA_SWQE_CRC
2207 | EHEA_SWQE_IP_CHECKSUM
2208 | EHEA_SWQE_IMM_DATA_PRESENT;
2209 }
2210 } else {
2211 /* Other Ethernet Protocol */
2212 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2213 }
2214 /* copy (immediate) data */
2215 if (nfrags == 0) {
2216 /* data is in a single piece */
2217 skb_copy_from_linear_data(skb, imm_data, skb->len);
2218 } else {
2219 /* first copy data from the skb->data buffer ... */
2220 skb_copy_from_linear_data(skb, imm_data,
2221 skb_headlen(skb));
2222 imm_data += skb_headlen(skb);
2223
2224 /* ... then copy data from the fragments */
2225 for (i = 0; i < nfrags; i++) {
2226 frag = &skb_shinfo(skb)->frags[i];
2227 memcpy(imm_data,
2228 page_address(frag->page) + frag->page_offset,
2229 frag->size);
2230 imm_data += frag->size;
2231 }
2232 }
2233 swqe->immediate_data_length = skb->len;
2234 dev_kfree_skb(skb);
2235 }
2236
2237 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2238 {
2239 struct tcphdr *tcp;
2240 u32 tmp;
2241
2242 if ((skb->protocol == htons(ETH_P_IP)) &&
2243 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2244 tcp = (struct tcphdr *)(skb_network_header(skb) +
2245 (ip_hdr(skb)->ihl * 4));
2246 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2247 tmp += ip_hdr(skb)->daddr % 31;
2248 return tmp % num_qps;
2249 } else
2250 return 0;
2251 }
2252
2253 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2254 {
2255 struct ehea_port *port = netdev_priv(dev);
2256 struct ehea_swqe *swqe;
2257 unsigned long flags;
2258 u32 lkey;
2259 int swqe_index;
2260 struct ehea_port_res *pr;
2261
2262 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2263
2264 if (!spin_trylock(&pr->xmit_lock))
2265 return NETDEV_TX_BUSY;
2266
2267 if (pr->queue_stopped) {
2268 spin_unlock(&pr->xmit_lock);
2269 return NETDEV_TX_BUSY;
2270 }
2271
2272 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2273 memset(swqe, 0, SWQE_HEADER_SIZE);
2274 atomic_dec(&pr->swqe_avail);
2275
2276 if (vlan_tx_tag_present(skb)) {
2277 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2278 swqe->vlan_tag = vlan_tx_tag_get(skb);
2279 }
2280
2281 pr->tx_packets++;
2282 pr->tx_bytes += skb->len;
2283
2284 if (skb->len <= SWQE3_MAX_IMM) {
2285 u32 sig_iv = port->sig_comp_iv;
2286 u32 swqe_num = pr->swqe_id_counter;
2287 ehea_xmit3(skb, dev, swqe);
2288 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2289 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2290 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2291 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2292 sig_iv);
2293 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2294 pr->swqe_ll_count = 0;
2295 } else
2296 pr->swqe_ll_count += 1;
2297 } else {
2298 swqe->wr_id =
2299 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2300 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2301 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2302 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2303 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2304
2305 pr->sq_skba.index++;
2306 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2307
2308 lkey = pr->send_mr.lkey;
2309 ehea_xmit2(skb, dev, swqe, lkey);
2310 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2311 }
2312 pr->swqe_id_counter += 1;
2313
2314 netif_info(port, tx_queued, dev,
2315 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2316 if (netif_msg_tx_queued(port))
2317 ehea_dump(swqe, 512, "swqe");
2318
2319 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2320 netif_stop_queue(dev);
2321 swqe->tx_control |= EHEA_SWQE_PURGE;
2322 }
2323
2324 ehea_post_swqe(pr->qp, swqe);
2325
2326 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2327 spin_lock_irqsave(&pr->netif_queue, flags);
2328 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2329 pr->p_stats.queue_stopped++;
2330 netif_stop_queue(dev);
2331 pr->queue_stopped = 1;
2332 }
2333 spin_unlock_irqrestore(&pr->netif_queue, flags);
2334 }
2335 dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2336 spin_unlock(&pr->xmit_lock);
2337
2338 return NETDEV_TX_OK;
2339 }
2340
2341 static void ehea_vlan_rx_register(struct net_device *dev,
2342 struct vlan_group *grp)
2343 {
2344 struct ehea_port *port = netdev_priv(dev);
2345 struct ehea_adapter *adapter = port->adapter;
2346 struct hcp_ehea_port_cb1 *cb1;
2347 u64 hret;
2348
2349 port->vgrp = grp;
2350
2351 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2352 if (!cb1) {
2353 pr_err("no mem for cb1\n");
2354 goto out;
2355 }
2356
2357 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2358 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2359 if (hret != H_SUCCESS)
2360 pr_err("modify_ehea_port failed\n");
2361
2362 free_page((unsigned long)cb1);
2363 out:
2364 return;
2365 }
2366
2367 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2368 {
2369 struct ehea_port *port = netdev_priv(dev);
2370 struct ehea_adapter *adapter = port->adapter;
2371 struct hcp_ehea_port_cb1 *cb1;
2372 int index;
2373 u64 hret;
2374
2375 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2376 if (!cb1) {
2377 pr_err("no mem for cb1\n");
2378 goto out;
2379 }
2380
2381 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2382 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2383 if (hret != H_SUCCESS) {
2384 pr_err("query_ehea_port failed\n");
2385 goto out;
2386 }
2387
2388 index = (vid / 64);
2389 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2390
2391 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2392 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2393 if (hret != H_SUCCESS)
2394 pr_err("modify_ehea_port failed\n");
2395 out:
2396 free_page((unsigned long)cb1);
2397 return;
2398 }
2399
2400 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2401 {
2402 struct ehea_port *port = netdev_priv(dev);
2403 struct ehea_adapter *adapter = port->adapter;
2404 struct hcp_ehea_port_cb1 *cb1;
2405 int index;
2406 u64 hret;
2407
2408 vlan_group_set_device(port->vgrp, vid, NULL);
2409
2410 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2411 if (!cb1) {
2412 pr_err("no mem for cb1\n");
2413 goto out;
2414 }
2415
2416 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2417 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2418 if (hret != H_SUCCESS) {
2419 pr_err("query_ehea_port failed\n");
2420 goto out;
2421 }
2422
2423 index = (vid / 64);
2424 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2425
2426 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2427 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2428 if (hret != H_SUCCESS)
2429 pr_err("modify_ehea_port failed\n");
2430 out:
2431 free_page((unsigned long)cb1);
2432 }
2433
2434 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2435 {
2436 int ret = -EIO;
2437 u64 hret;
2438 u16 dummy16 = 0;
2439 u64 dummy64 = 0;
2440 struct hcp_modify_qp_cb0 *cb0;
2441
2442 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2443 if (!cb0) {
2444 ret = -ENOMEM;
2445 goto out;
2446 }
2447
2448 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2449 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2450 if (hret != H_SUCCESS) {
2451 pr_err("query_ehea_qp failed (1)\n");
2452 goto out;
2453 }
2454
2455 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2456 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2457 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2458 &dummy64, &dummy64, &dummy16, &dummy16);
2459 if (hret != H_SUCCESS) {
2460 pr_err("modify_ehea_qp failed (1)\n");
2461 goto out;
2462 }
2463
2464 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2465 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2466 if (hret != H_SUCCESS) {
2467 pr_err("query_ehea_qp failed (2)\n");
2468 goto out;
2469 }
2470
2471 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2472 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2473 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2474 &dummy64, &dummy64, &dummy16, &dummy16);
2475 if (hret != H_SUCCESS) {
2476 pr_err("modify_ehea_qp failed (2)\n");
2477 goto out;
2478 }
2479
2480 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2481 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2482 if (hret != H_SUCCESS) {
2483 pr_err("query_ehea_qp failed (3)\n");
2484 goto out;
2485 }
2486
2487 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2488 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2489 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2490 &dummy64, &dummy64, &dummy16, &dummy16);
2491 if (hret != H_SUCCESS) {
2492 pr_err("modify_ehea_qp failed (3)\n");
2493 goto out;
2494 }
2495
2496 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2497 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2498 if (hret != H_SUCCESS) {
2499 pr_err("query_ehea_qp failed (4)\n");
2500 goto out;
2501 }
2502
2503 ret = 0;
2504 out:
2505 free_page((unsigned long)cb0);
2506 return ret;
2507 }
2508
2509 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2510 int add_tx_qps)
2511 {
2512 int ret, i;
2513 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2514 enum ehea_eq_type eq_type = EHEA_EQ;
2515
2516 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2517 EHEA_MAX_ENTRIES_EQ, 1);
2518 if (!port->qp_eq) {
2519 ret = -EINVAL;
2520 pr_err("ehea_create_eq failed (qp_eq)\n");
2521 goto out_kill_eq;
2522 }
2523
2524 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2525 pr_cfg.max_entries_scq = sq_entries * 2;
2526 pr_cfg.max_entries_sq = sq_entries;
2527 pr_cfg.max_entries_rq1 = rq1_entries;
2528 pr_cfg.max_entries_rq2 = rq2_entries;
2529 pr_cfg.max_entries_rq3 = rq3_entries;
2530
2531 pr_cfg_small_rx.max_entries_rcq = 1;
2532 pr_cfg_small_rx.max_entries_scq = sq_entries;
2533 pr_cfg_small_rx.max_entries_sq = sq_entries;
2534 pr_cfg_small_rx.max_entries_rq1 = 1;
2535 pr_cfg_small_rx.max_entries_rq2 = 1;
2536 pr_cfg_small_rx.max_entries_rq3 = 1;
2537
2538 for (i = 0; i < def_qps; i++) {
2539 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2540 if (ret)
2541 goto out_clean_pr;
2542 }
2543 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2544 ret = ehea_init_port_res(port, &port->port_res[i],
2545 &pr_cfg_small_rx, i);
2546 if (ret)
2547 goto out_clean_pr;
2548 }
2549
2550 return 0;
2551
2552 out_clean_pr:
2553 while (--i >= 0)
2554 ehea_clean_portres(port, &port->port_res[i]);
2555
2556 out_kill_eq:
2557 ehea_destroy_eq(port->qp_eq);
2558 return ret;
2559 }
2560
2561 static int ehea_clean_all_portres(struct ehea_port *port)
2562 {
2563 int ret = 0;
2564 int i;
2565
2566 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2567 ret |= ehea_clean_portres(port, &port->port_res[i]);
2568
2569 ret |= ehea_destroy_eq(port->qp_eq);
2570
2571 return ret;
2572 }
2573
2574 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2575 {
2576 if (adapter->active_ports)
2577 return;
2578
2579 ehea_rem_mr(&adapter->mr);
2580 }
2581
2582 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2583 {
2584 if (adapter->active_ports)
2585 return 0;
2586
2587 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2588 }
2589
2590 static int ehea_up(struct net_device *dev)
2591 {
2592 int ret, i;
2593 struct ehea_port *port = netdev_priv(dev);
2594
2595 if (port->state == EHEA_PORT_UP)
2596 return 0;
2597
2598 ret = ehea_port_res_setup(port, port->num_def_qps,
2599 port->num_add_tx_qps);
2600 if (ret) {
2601 netdev_err(dev, "port_res_failed\n");
2602 goto out;
2603 }
2604
2605 /* Set default QP for this port */
2606 ret = ehea_configure_port(port);
2607 if (ret) {
2608 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2609 goto out_clean_pr;
2610 }
2611
2612 ret = ehea_reg_interrupts(dev);
2613 if (ret) {
2614 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2615 goto out_clean_pr;
2616 }
2617
2618 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2619 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2620 if (ret) {
2621 netdev_err(dev, "activate_qp failed\n");
2622 goto out_free_irqs;
2623 }
2624 }
2625
2626 for (i = 0; i < port->num_def_qps; i++) {
2627 ret = ehea_fill_port_res(&port->port_res[i]);
2628 if (ret) {
2629 netdev_err(dev, "out_free_irqs\n");
2630 goto out_free_irqs;
2631 }
2632 }
2633
2634 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2635 if (ret) {
2636 ret = -EIO;
2637 goto out_free_irqs;
2638 }
2639
2640 port->state = EHEA_PORT_UP;
2641
2642 ret = 0;
2643 goto out;
2644
2645 out_free_irqs:
2646 ehea_free_interrupts(dev);
2647
2648 out_clean_pr:
2649 ehea_clean_all_portres(port);
2650 out:
2651 if (ret)
2652 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2653
2654 ehea_update_bcmc_registrations();
2655 ehea_update_firmware_handles();
2656
2657 return ret;
2658 }
2659
2660 static void port_napi_disable(struct ehea_port *port)
2661 {
2662 int i;
2663
2664 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2665 napi_disable(&port->port_res[i].napi);
2666 }
2667
2668 static void port_napi_enable(struct ehea_port *port)
2669 {
2670 int i;
2671
2672 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2673 napi_enable(&port->port_res[i].napi);
2674 }
2675
2676 static int ehea_open(struct net_device *dev)
2677 {
2678 int ret;
2679 struct ehea_port *port = netdev_priv(dev);
2680
2681 mutex_lock(&port->port_lock);
2682
2683 netif_info(port, ifup, dev, "enabling port\n");
2684
2685 ret = ehea_up(dev);
2686 if (!ret) {
2687 port_napi_enable(port);
2688 netif_start_queue(dev);
2689 }
2690
2691 init_waitqueue_head(&port->swqe_avail_wq);
2692 init_waitqueue_head(&port->restart_wq);
2693
2694 mutex_unlock(&port->port_lock);
2695
2696 return ret;
2697 }
2698
2699 static int ehea_down(struct net_device *dev)
2700 {
2701 int ret;
2702 struct ehea_port *port = netdev_priv(dev);
2703
2704 if (port->state == EHEA_PORT_DOWN)
2705 return 0;
2706
2707 ehea_drop_multicast_list(dev);
2708 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2709
2710 ehea_free_interrupts(dev);
2711
2712 port->state = EHEA_PORT_DOWN;
2713
2714 ehea_update_bcmc_registrations();
2715
2716 ret = ehea_clean_all_portres(port);
2717 if (ret)
2718 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2719
2720 ehea_update_firmware_handles();
2721
2722 return ret;
2723 }
2724
2725 static int ehea_stop(struct net_device *dev)
2726 {
2727 int ret;
2728 struct ehea_port *port = netdev_priv(dev);
2729
2730 netif_info(port, ifdown, dev, "disabling port\n");
2731
2732 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2733 cancel_work_sync(&port->reset_task);
2734 mutex_lock(&port->port_lock);
2735 netif_stop_queue(dev);
2736 port_napi_disable(port);
2737 ret = ehea_down(dev);
2738 mutex_unlock(&port->port_lock);
2739 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2740 return ret;
2741 }
2742
2743 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2744 {
2745 struct ehea_qp qp = *orig_qp;
2746 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2747 struct ehea_swqe *swqe;
2748 int wqe_index;
2749 int i;
2750
2751 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2752 swqe = ehea_get_swqe(&qp, &wqe_index);
2753 swqe->tx_control |= EHEA_SWQE_PURGE;
2754 }
2755 }
2756
2757 static void ehea_flush_sq(struct ehea_port *port)
2758 {
2759 int i;
2760
2761 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2762 struct ehea_port_res *pr = &port->port_res[i];
2763 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2764 int ret;
2765
2766 ret = wait_event_timeout(port->swqe_avail_wq,
2767 atomic_read(&pr->swqe_avail) >= swqe_max,
2768 msecs_to_jiffies(100));
2769
2770 if (!ret) {
2771 pr_err("WARNING: sq not flushed completely\n");
2772 break;
2773 }
2774 }
2775 }
2776
2777 int ehea_stop_qps(struct net_device *dev)
2778 {
2779 struct ehea_port *port = netdev_priv(dev);
2780 struct ehea_adapter *adapter = port->adapter;
2781 struct hcp_modify_qp_cb0 *cb0;
2782 int ret = -EIO;
2783 int dret;
2784 int i;
2785 u64 hret;
2786 u64 dummy64 = 0;
2787 u16 dummy16 = 0;
2788
2789 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2790 if (!cb0) {
2791 ret = -ENOMEM;
2792 goto out;
2793 }
2794
2795 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2796 struct ehea_port_res *pr = &port->port_res[i];
2797 struct ehea_qp *qp = pr->qp;
2798
2799 /* Purge send queue */
2800 ehea_purge_sq(qp);
2801
2802 /* Disable queue pair */
2803 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2804 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2805 cb0);
2806 if (hret != H_SUCCESS) {
2807 pr_err("query_ehea_qp failed (1)\n");
2808 goto out;
2809 }
2810
2811 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2812 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2813
2814 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2815 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2816 1), cb0, &dummy64,
2817 &dummy64, &dummy16, &dummy16);
2818 if (hret != H_SUCCESS) {
2819 pr_err("modify_ehea_qp failed (1)\n");
2820 goto out;
2821 }
2822
2823 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2824 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2825 cb0);
2826 if (hret != H_SUCCESS) {
2827 pr_err("query_ehea_qp failed (2)\n");
2828 goto out;
2829 }
2830
2831 /* deregister shared memory regions */
2832 dret = ehea_rem_smrs(pr);
2833 if (dret) {
2834 pr_err("unreg shared memory region failed\n");
2835 goto out;
2836 }
2837 }
2838
2839 ret = 0;
2840 out:
2841 free_page((unsigned long)cb0);
2842
2843 return ret;
2844 }
2845
2846 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2847 {
2848 struct ehea_qp qp = *orig_qp;
2849 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2850 struct ehea_rwqe *rwqe;
2851 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2852 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2853 struct sk_buff *skb;
2854 u32 lkey = pr->recv_mr.lkey;
2855
2856
2857 int i;
2858 int index;
2859
2860 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2861 rwqe = ehea_get_next_rwqe(&qp, 2);
2862 rwqe->sg_list[0].l_key = lkey;
2863 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2864 skb = skba_rq2[index];
2865 if (skb)
2866 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2867 }
2868
2869 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2870 rwqe = ehea_get_next_rwqe(&qp, 3);
2871 rwqe->sg_list[0].l_key = lkey;
2872 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2873 skb = skba_rq3[index];
2874 if (skb)
2875 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2876 }
2877 }
2878
2879 int ehea_restart_qps(struct net_device *dev)
2880 {
2881 struct ehea_port *port = netdev_priv(dev);
2882 struct ehea_adapter *adapter = port->adapter;
2883 int ret = 0;
2884 int i;
2885
2886 struct hcp_modify_qp_cb0 *cb0;
2887 u64 hret;
2888 u64 dummy64 = 0;
2889 u16 dummy16 = 0;
2890
2891 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2892 if (!cb0) {
2893 ret = -ENOMEM;
2894 goto out;
2895 }
2896
2897 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2898 struct ehea_port_res *pr = &port->port_res[i];
2899 struct ehea_qp *qp = pr->qp;
2900
2901 ret = ehea_gen_smrs(pr);
2902 if (ret) {
2903 netdev_err(dev, "creation of shared memory regions failed\n");
2904 goto out;
2905 }
2906
2907 ehea_update_rqs(qp, pr);
2908
2909 /* Enable queue pair */
2910 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2911 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2912 cb0);
2913 if (hret != H_SUCCESS) {
2914 netdev_err(dev, "query_ehea_qp failed (1)\n");
2915 goto out;
2916 }
2917
2918 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2919 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2920
2921 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2922 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2923 1), cb0, &dummy64,
2924 &dummy64, &dummy16, &dummy16);
2925 if (hret != H_SUCCESS) {
2926 netdev_err(dev, "modify_ehea_qp failed (1)\n");
2927 goto out;
2928 }
2929
2930 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2931 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2932 cb0);
2933 if (hret != H_SUCCESS) {
2934 netdev_err(dev, "query_ehea_qp failed (2)\n");
2935 goto out;
2936 }
2937
2938 /* refill entire queue */
2939 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2940 ehea_refill_rq2(pr, 0);
2941 ehea_refill_rq3(pr, 0);
2942 }
2943 out:
2944 free_page((unsigned long)cb0);
2945
2946 return ret;
2947 }
2948
2949 static void ehea_reset_port(struct work_struct *work)
2950 {
2951 int ret;
2952 struct ehea_port *port =
2953 container_of(work, struct ehea_port, reset_task);
2954 struct net_device *dev = port->netdev;
2955
2956 mutex_lock(&dlpar_mem_lock);
2957 port->resets++;
2958 mutex_lock(&port->port_lock);
2959 netif_stop_queue(dev);
2960
2961 port_napi_disable(port);
2962
2963 ehea_down(dev);
2964
2965 ret = ehea_up(dev);
2966 if (ret)
2967 goto out;
2968
2969 ehea_set_multicast_list(dev);
2970
2971 netif_info(port, timer, dev, "reset successful\n");
2972
2973 port_napi_enable(port);
2974
2975 netif_wake_queue(dev);
2976 out:
2977 mutex_unlock(&port->port_lock);
2978 mutex_unlock(&dlpar_mem_lock);
2979 }
2980
2981 static void ehea_rereg_mrs(void)
2982 {
2983 int ret, i;
2984 struct ehea_adapter *adapter;
2985
2986 pr_info("LPAR memory changed - re-initializing driver\n");
2987
2988 list_for_each_entry(adapter, &adapter_list, list)
2989 if (adapter->active_ports) {
2990 /* Shutdown all ports */
2991 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2992 struct ehea_port *port = adapter->port[i];
2993 struct net_device *dev;
2994
2995 if (!port)
2996 continue;
2997
2998 dev = port->netdev;
2999
3000 if (dev->flags & IFF_UP) {
3001 mutex_lock(&port->port_lock);
3002 netif_stop_queue(dev);
3003 ehea_flush_sq(port);
3004 ret = ehea_stop_qps(dev);
3005 if (ret) {
3006 mutex_unlock(&port->port_lock);
3007 goto out;
3008 }
3009 port_napi_disable(port);
3010 mutex_unlock(&port->port_lock);
3011 }
3012 reset_sq_restart_flag(port);
3013 }
3014
3015 /* Unregister old memory region */
3016 ret = ehea_rem_mr(&adapter->mr);
3017 if (ret) {
3018 pr_err("unregister MR failed - driver inoperable!\n");
3019 goto out;
3020 }
3021 }
3022
3023 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3024
3025 list_for_each_entry(adapter, &adapter_list, list)
3026 if (adapter->active_ports) {
3027 /* Register new memory region */
3028 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
3029 if (ret) {
3030 pr_err("register MR failed - driver inoperable!\n");
3031 goto out;
3032 }
3033
3034 /* Restart all ports */
3035 for (i = 0; i < EHEA_MAX_PORTS; i++) {
3036 struct ehea_port *port = adapter->port[i];
3037
3038 if (port) {
3039 struct net_device *dev = port->netdev;
3040
3041 if (dev->flags & IFF_UP) {
3042 mutex_lock(&port->port_lock);
3043 ret = ehea_restart_qps(dev);
3044 if (!ret) {
3045 check_sqs(port);
3046 port_napi_enable(port);
3047 netif_wake_queue(dev);
3048 } else {
3049 netdev_err(dev, "Unable to restart QPS\n");
3050 }
3051 mutex_unlock(&port->port_lock);
3052 }
3053 }
3054 }
3055 }
3056 pr_info("re-initializing driver complete\n");
3057 out:
3058 return;
3059 }
3060
3061 static void ehea_tx_watchdog(struct net_device *dev)
3062 {
3063 struct ehea_port *port = netdev_priv(dev);
3064
3065 if (netif_carrier_ok(dev) &&
3066 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3067 ehea_schedule_port_reset(port);
3068 }
3069
3070 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3071 {
3072 struct hcp_query_ehea *cb;
3073 u64 hret;
3074 int ret;
3075
3076 cb = (void *)get_zeroed_page(GFP_KERNEL);
3077 if (!cb) {
3078 ret = -ENOMEM;
3079 goto out;
3080 }
3081
3082 hret = ehea_h_query_ehea(adapter->handle, cb);
3083
3084 if (hret != H_SUCCESS) {
3085 ret = -EIO;
3086 goto out_herr;
3087 }
3088
3089 adapter->max_mc_mac = cb->max_mc_mac - 1;
3090 ret = 0;
3091
3092 out_herr:
3093 free_page((unsigned long)cb);
3094 out:
3095 return ret;
3096 }
3097
3098 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3099 {
3100 struct hcp_ehea_port_cb4 *cb4;
3101 u64 hret;
3102 int ret = 0;
3103
3104 *jumbo = 0;
3105
3106 /* (Try to) enable *jumbo frames */
3107 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3108 if (!cb4) {
3109 pr_err("no mem for cb4\n");
3110 ret = -ENOMEM;
3111 goto out;
3112 } else {
3113 hret = ehea_h_query_ehea_port(port->adapter->handle,
3114 port->logical_port_id,
3115 H_PORT_CB4,
3116 H_PORT_CB4_JUMBO, cb4);
3117 if (hret == H_SUCCESS) {
3118 if (cb4->jumbo_frame)
3119 *jumbo = 1;
3120 else {
3121 cb4->jumbo_frame = 1;
3122 hret = ehea_h_modify_ehea_port(port->adapter->
3123 handle,
3124 port->
3125 logical_port_id,
3126 H_PORT_CB4,
3127 H_PORT_CB4_JUMBO,
3128 cb4);
3129 if (hret == H_SUCCESS)
3130 *jumbo = 1;
3131 }
3132 } else
3133 ret = -EINVAL;
3134
3135 free_page((unsigned long)cb4);
3136 }
3137 out:
3138 return ret;
3139 }
3140
3141 static ssize_t ehea_show_port_id(struct device *dev,
3142 struct device_attribute *attr, char *buf)
3143 {
3144 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3145 return sprintf(buf, "%d", port->logical_port_id);
3146 }
3147
3148 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3149 NULL);
3150
3151 static void __devinit logical_port_release(struct device *dev)
3152 {
3153 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3154 of_node_put(port->ofdev.dev.of_node);
3155 }
3156
3157 static struct device *ehea_register_port(struct ehea_port *port,
3158 struct device_node *dn)
3159 {
3160 int ret;
3161
3162 port->ofdev.dev.of_node = of_node_get(dn);
3163 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3164 port->ofdev.dev.bus = &ibmebus_bus_type;
3165
3166 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3167 port->ofdev.dev.release = logical_port_release;
3168
3169 ret = of_device_register(&port->ofdev);
3170 if (ret) {
3171 pr_err("failed to register device. ret=%d\n", ret);
3172 goto out;
3173 }
3174
3175 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3176 if (ret) {
3177 pr_err("failed to register attributes, ret=%d\n", ret);
3178 goto out_unreg_of_dev;
3179 }
3180
3181 return &port->ofdev.dev;
3182
3183 out_unreg_of_dev:
3184 of_device_unregister(&port->ofdev);
3185 out:
3186 return NULL;
3187 }
3188
3189 static void ehea_unregister_port(struct ehea_port *port)
3190 {
3191 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3192 of_device_unregister(&port->ofdev);
3193 }
3194
3195 static const struct net_device_ops ehea_netdev_ops = {
3196 .ndo_open = ehea_open,
3197 .ndo_stop = ehea_stop,
3198 .ndo_start_xmit = ehea_start_xmit,
3199 #ifdef CONFIG_NET_POLL_CONTROLLER
3200 .ndo_poll_controller = ehea_netpoll,
3201 #endif
3202 .ndo_get_stats = ehea_get_stats,
3203 .ndo_set_mac_address = ehea_set_mac_addr,
3204 .ndo_validate_addr = eth_validate_addr,
3205 .ndo_set_multicast_list = ehea_set_multicast_list,
3206 .ndo_change_mtu = ehea_change_mtu,
3207 .ndo_vlan_rx_register = ehea_vlan_rx_register,
3208 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
3209 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
3210 .ndo_tx_timeout = ehea_tx_watchdog,
3211 };
3212
3213 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3214 u32 logical_port_id,
3215 struct device_node *dn)
3216 {
3217 int ret;
3218 struct net_device *dev;
3219 struct ehea_port *port;
3220 struct device *port_dev;
3221 int jumbo;
3222
3223 /* allocate memory for the port structures */
3224 dev = alloc_etherdev(sizeof(struct ehea_port));
3225
3226 if (!dev) {
3227 pr_err("no mem for net_device\n");
3228 ret = -ENOMEM;
3229 goto out_err;
3230 }
3231
3232 port = netdev_priv(dev);
3233
3234 mutex_init(&port->port_lock);
3235 port->state = EHEA_PORT_DOWN;
3236 port->sig_comp_iv = sq_entries / 10;
3237
3238 port->adapter = adapter;
3239 port->netdev = dev;
3240 port->logical_port_id = logical_port_id;
3241
3242 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3243
3244 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3245 if (!port->mc_list) {
3246 ret = -ENOMEM;
3247 goto out_free_ethdev;
3248 }
3249
3250 INIT_LIST_HEAD(&port->mc_list->list);
3251
3252 ret = ehea_sense_port_attr(port);
3253 if (ret)
3254 goto out_free_mc_list;
3255
3256 port_dev = ehea_register_port(port, dn);
3257 if (!port_dev)
3258 goto out_free_mc_list;
3259
3260 SET_NETDEV_DEV(dev, port_dev);
3261
3262 /* initialize net_device structure */
3263 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3264
3265 dev->netdev_ops = &ehea_netdev_ops;
3266 ehea_set_ethtool_ops(dev);
3267
3268 dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3269 | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3270 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3271 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3272 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3273 | NETIF_F_LLTX | NETIF_F_RXCSUM;
3274 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3275
3276 if (use_lro)
3277 dev->features |= NETIF_F_LRO;
3278
3279 INIT_WORK(&port->reset_task, ehea_reset_port);
3280
3281 ret = register_netdev(dev);
3282 if (ret) {
3283 pr_err("register_netdev failed. ret=%d\n", ret);
3284 goto out_unreg_port;
3285 }
3286
3287 port->lro_max_aggr = lro_max_aggr;
3288
3289 ret = ehea_get_jumboframe_status(port, &jumbo);
3290 if (ret)
3291 netdev_err(dev, "failed determining jumbo frame status\n");
3292
3293 netdev_info(dev, "Jumbo frames are %sabled\n",
3294 jumbo == 1 ? "en" : "dis");
3295
3296 adapter->active_ports++;
3297
3298 return port;
3299
3300 out_unreg_port:
3301 ehea_unregister_port(port);
3302
3303 out_free_mc_list:
3304 kfree(port->mc_list);
3305
3306 out_free_ethdev:
3307 free_netdev(dev);
3308
3309 out_err:
3310 pr_err("setting up logical port with id=%d failed, ret=%d\n",
3311 logical_port_id, ret);
3312 return NULL;
3313 }
3314
3315 static void ehea_shutdown_single_port(struct ehea_port *port)
3316 {
3317 struct ehea_adapter *adapter = port->adapter;
3318
3319 cancel_work_sync(&port->reset_task);
3320 unregister_netdev(port->netdev);
3321 ehea_unregister_port(port);
3322 kfree(port->mc_list);
3323 free_netdev(port->netdev);
3324 adapter->active_ports--;
3325 }
3326
3327 static int ehea_setup_ports(struct ehea_adapter *adapter)
3328 {
3329 struct device_node *lhea_dn;
3330 struct device_node *eth_dn = NULL;
3331
3332 const u32 *dn_log_port_id;
3333 int i = 0;
3334
3335 lhea_dn = adapter->ofdev->dev.of_node;
3336 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3337
3338 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3339 NULL);
3340 if (!dn_log_port_id) {
3341 pr_err("bad device node: eth_dn name=%s\n",
3342 eth_dn->full_name);
3343 continue;
3344 }
3345
3346 if (ehea_add_adapter_mr(adapter)) {
3347 pr_err("creating MR failed\n");
3348 of_node_put(eth_dn);
3349 return -EIO;
3350 }
3351
3352 adapter->port[i] = ehea_setup_single_port(adapter,
3353 *dn_log_port_id,
3354 eth_dn);
3355 if (adapter->port[i])
3356 netdev_info(adapter->port[i]->netdev,
3357 "logical port id #%d\n", *dn_log_port_id);
3358 else
3359 ehea_remove_adapter_mr(adapter);
3360
3361 i++;
3362 }
3363 return 0;
3364 }
3365
3366 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3367 u32 logical_port_id)
3368 {
3369 struct device_node *lhea_dn;
3370 struct device_node *eth_dn = NULL;
3371 const u32 *dn_log_port_id;
3372
3373 lhea_dn = adapter->ofdev->dev.of_node;
3374 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3375
3376 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3377 NULL);
3378 if (dn_log_port_id)
3379 if (*dn_log_port_id == logical_port_id)
3380 return eth_dn;
3381 }
3382
3383 return NULL;
3384 }
3385
3386 static ssize_t ehea_probe_port(struct device *dev,
3387 struct device_attribute *attr,
3388 const char *buf, size_t count)
3389 {
3390 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3391 struct ehea_port *port;
3392 struct device_node *eth_dn = NULL;
3393 int i;
3394
3395 u32 logical_port_id;
3396
3397 sscanf(buf, "%d", &logical_port_id);
3398
3399 port = ehea_get_port(adapter, logical_port_id);
3400
3401 if (port) {
3402 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3403 logical_port_id);
3404 return -EINVAL;
3405 }
3406
3407 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3408
3409 if (!eth_dn) {
3410 pr_info("no logical port with id %d found\n", logical_port_id);
3411 return -EINVAL;
3412 }
3413
3414 if (ehea_add_adapter_mr(adapter)) {
3415 pr_err("creating MR failed\n");
3416 return -EIO;
3417 }
3418
3419 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3420
3421 of_node_put(eth_dn);
3422
3423 if (port) {
3424 for (i = 0; i < EHEA_MAX_PORTS; i++)
3425 if (!adapter->port[i]) {
3426 adapter->port[i] = port;
3427 break;
3428 }
3429
3430 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3431 logical_port_id);
3432 } else {
3433 ehea_remove_adapter_mr(adapter);
3434 return -EIO;
3435 }
3436
3437 return (ssize_t) count;
3438 }
3439
3440 static ssize_t ehea_remove_port(struct device *dev,
3441 struct device_attribute *attr,
3442 const char *buf, size_t count)
3443 {
3444 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3445 struct ehea_port *port;
3446 int i;
3447 u32 logical_port_id;
3448
3449 sscanf(buf, "%d", &logical_port_id);
3450
3451 port = ehea_get_port(adapter, logical_port_id);
3452
3453 if (port) {
3454 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3455 logical_port_id);
3456
3457 ehea_shutdown_single_port(port);
3458
3459 for (i = 0; i < EHEA_MAX_PORTS; i++)
3460 if (adapter->port[i] == port) {
3461 adapter->port[i] = NULL;
3462 break;
3463 }
3464 } else {
3465 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3466 logical_port_id);
3467 return -EINVAL;
3468 }
3469
3470 ehea_remove_adapter_mr(adapter);
3471
3472 return (ssize_t) count;
3473 }
3474
3475 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3476 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3477
3478 int ehea_create_device_sysfs(struct platform_device *dev)
3479 {
3480 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3481 if (ret)
3482 goto out;
3483
3484 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3485 out:
3486 return ret;
3487 }
3488
3489 void ehea_remove_device_sysfs(struct platform_device *dev)
3490 {
3491 device_remove_file(&dev->dev, &dev_attr_probe_port);
3492 device_remove_file(&dev->dev, &dev_attr_remove_port);
3493 }
3494
3495 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3496 const struct of_device_id *id)
3497 {
3498 struct ehea_adapter *adapter;
3499 const u64 *adapter_handle;
3500 int ret;
3501
3502 if (!dev || !dev->dev.of_node) {
3503 pr_err("Invalid ibmebus device probed\n");
3504 return -EINVAL;
3505 }
3506
3507 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3508 if (!adapter) {
3509 ret = -ENOMEM;
3510 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3511 goto out;
3512 }
3513
3514 list_add(&adapter->list, &adapter_list);
3515
3516 adapter->ofdev = dev;
3517
3518 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3519 NULL);
3520 if (adapter_handle)
3521 adapter->handle = *adapter_handle;
3522
3523 if (!adapter->handle) {
3524 dev_err(&dev->dev, "failed getting handle for adapter"
3525 " '%s'\n", dev->dev.of_node->full_name);
3526 ret = -ENODEV;
3527 goto out_free_ad;
3528 }
3529
3530 adapter->pd = EHEA_PD_ID;
3531
3532 dev_set_drvdata(&dev->dev, adapter);
3533
3534
3535 /* initialize adapter and ports */
3536 /* get adapter properties */
3537 ret = ehea_sense_adapter_attr(adapter);
3538 if (ret) {
3539 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3540 goto out_free_ad;
3541 }
3542
3543 adapter->neq = ehea_create_eq(adapter,
3544 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3545 if (!adapter->neq) {
3546 ret = -EIO;
3547 dev_err(&dev->dev, "NEQ creation failed\n");
3548 goto out_free_ad;
3549 }
3550
3551 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3552 (unsigned long)adapter);
3553
3554 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3555 ehea_interrupt_neq, IRQF_DISABLED,
3556 "ehea_neq", adapter);
3557 if (ret) {
3558 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3559 goto out_kill_eq;
3560 }
3561
3562 ret = ehea_create_device_sysfs(dev);
3563 if (ret)
3564 goto out_free_irq;
3565
3566 ret = ehea_setup_ports(adapter);
3567 if (ret) {
3568 dev_err(&dev->dev, "setup_ports failed\n");
3569 goto out_rem_dev_sysfs;
3570 }
3571
3572 ret = 0;
3573 goto out;
3574
3575 out_rem_dev_sysfs:
3576 ehea_remove_device_sysfs(dev);
3577
3578 out_free_irq:
3579 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3580
3581 out_kill_eq:
3582 ehea_destroy_eq(adapter->neq);
3583
3584 out_free_ad:
3585 list_del(&adapter->list);
3586 kfree(adapter);
3587
3588 out:
3589 ehea_update_firmware_handles();
3590
3591 return ret;
3592 }
3593
3594 static int __devexit ehea_remove(struct platform_device *dev)
3595 {
3596 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3597 int i;
3598
3599 for (i = 0; i < EHEA_MAX_PORTS; i++)
3600 if (adapter->port[i]) {
3601 ehea_shutdown_single_port(adapter->port[i]);
3602 adapter->port[i] = NULL;
3603 }
3604
3605 ehea_remove_device_sysfs(dev);
3606
3607 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3608 tasklet_kill(&adapter->neq_tasklet);
3609
3610 ehea_destroy_eq(adapter->neq);
3611 ehea_remove_adapter_mr(adapter);
3612 list_del(&adapter->list);
3613 kfree(adapter);
3614
3615 ehea_update_firmware_handles();
3616
3617 return 0;
3618 }
3619
3620 void ehea_crash_handler(void)
3621 {
3622 int i;
3623
3624 if (ehea_fw_handles.arr)
3625 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3626 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3627 ehea_fw_handles.arr[i].fwh,
3628 FORCE_FREE);
3629
3630 if (ehea_bcmc_regs.arr)
3631 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3632 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3633 ehea_bcmc_regs.arr[i].port_id,
3634 ehea_bcmc_regs.arr[i].reg_type,
3635 ehea_bcmc_regs.arr[i].macaddr,
3636 0, H_DEREG_BCMC);
3637 }
3638
3639 static int ehea_mem_notifier(struct notifier_block *nb,
3640 unsigned long action, void *data)
3641 {
3642 int ret = NOTIFY_BAD;
3643 struct memory_notify *arg = data;
3644
3645 mutex_lock(&dlpar_mem_lock);
3646
3647 switch (action) {
3648 case MEM_CANCEL_OFFLINE:
3649 pr_info("memory offlining canceled");
3650 /* Readd canceled memory block */
3651 case MEM_ONLINE:
3652 pr_info("memory is going online");
3653 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3654 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3655 goto out_unlock;
3656 ehea_rereg_mrs();
3657 break;
3658 case MEM_GOING_OFFLINE:
3659 pr_info("memory is going offline");
3660 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3661 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3662 goto out_unlock;
3663 ehea_rereg_mrs();
3664 break;
3665 default:
3666 break;
3667 }
3668
3669 ehea_update_firmware_handles();
3670 ret = NOTIFY_OK;
3671
3672 out_unlock:
3673 mutex_unlock(&dlpar_mem_lock);
3674 return ret;
3675 }
3676
3677 static struct notifier_block ehea_mem_nb = {
3678 .notifier_call = ehea_mem_notifier,
3679 };
3680
3681 static int ehea_reboot_notifier(struct notifier_block *nb,
3682 unsigned long action, void *unused)
3683 {
3684 if (action == SYS_RESTART) {
3685 pr_info("Reboot: freeing all eHEA resources\n");
3686 ibmebus_unregister_driver(&ehea_driver);
3687 }
3688 return NOTIFY_DONE;
3689 }
3690
3691 static struct notifier_block ehea_reboot_nb = {
3692 .notifier_call = ehea_reboot_notifier,
3693 };
3694
3695 static int check_module_parm(void)
3696 {
3697 int ret = 0;
3698
3699 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3700 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3701 pr_info("Bad parameter: rq1_entries\n");
3702 ret = -EINVAL;
3703 }
3704 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3705 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3706 pr_info("Bad parameter: rq2_entries\n");
3707 ret = -EINVAL;
3708 }
3709 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3710 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3711 pr_info("Bad parameter: rq3_entries\n");
3712 ret = -EINVAL;
3713 }
3714 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3715 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3716 pr_info("Bad parameter: sq_entries\n");
3717 ret = -EINVAL;
3718 }
3719
3720 return ret;
3721 }
3722
3723 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3724 char *buf)
3725 {
3726 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3727 }
3728
3729 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3730 ehea_show_capabilities, NULL);
3731
3732 int __init ehea_module_init(void)
3733 {
3734 int ret;
3735
3736 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3737
3738 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3739 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3740
3741 mutex_init(&ehea_fw_handles.lock);
3742 spin_lock_init(&ehea_bcmc_regs.lock);
3743
3744 ret = check_module_parm();
3745 if (ret)
3746 goto out;
3747
3748 ret = ehea_create_busmap();
3749 if (ret)
3750 goto out;
3751
3752 ret = register_reboot_notifier(&ehea_reboot_nb);
3753 if (ret)
3754 pr_info("failed registering reboot notifier\n");
3755
3756 ret = register_memory_notifier(&ehea_mem_nb);
3757 if (ret)
3758 pr_info("failed registering memory remove notifier\n");
3759
3760 ret = crash_shutdown_register(ehea_crash_handler);
3761 if (ret)
3762 pr_info("failed registering crash handler\n");
3763
3764 ret = ibmebus_register_driver(&ehea_driver);
3765 if (ret) {
3766 pr_err("failed registering eHEA device driver on ebus\n");
3767 goto out2;
3768 }
3769
3770 ret = driver_create_file(&ehea_driver.driver,
3771 &driver_attr_capabilities);
3772 if (ret) {
3773 pr_err("failed to register capabilities attribute, ret=%d\n",
3774 ret);
3775 goto out3;
3776 }
3777
3778 return ret;
3779
3780 out3:
3781 ibmebus_unregister_driver(&ehea_driver);
3782 out2:
3783 unregister_memory_notifier(&ehea_mem_nb);
3784 unregister_reboot_notifier(&ehea_reboot_nb);
3785 crash_shutdown_unregister(ehea_crash_handler);
3786 out:
3787 return ret;
3788 }
3789
3790 static void __exit ehea_module_exit(void)
3791 {
3792 int ret;
3793
3794 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3795 ibmebus_unregister_driver(&ehea_driver);
3796 unregister_reboot_notifier(&ehea_reboot_nb);
3797 ret = crash_shutdown_unregister(ehea_crash_handler);
3798 if (ret)
3799 pr_info("failed unregistering crash handler\n");
3800 unregister_memory_notifier(&ehea_mem_nb);
3801 kfree(ehea_fw_handles.arr);
3802 kfree(ehea_bcmc_regs.arr);
3803 ehea_destroy_busmap();
3804 }
3805
3806 module_init(ehea_module_init);
3807 module_exit(ehea_module_exit);
linux-next