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