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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / net / ehea / ehea_main.c
blobf9bc21c74b59222a7c8775dfaba80a91d9abb626
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 <asm/kexec.h>
39 #include <linux/mutex.h>
40
41 #include <net/ip.h>
42
43 #include "ehea.h"
44 #include "ehea_qmr.h"
45 #include "ehea_phyp.h"
46
47
48 MODULE_LICENSE("GPL");
49 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
50 MODULE_DESCRIPTION("IBM eServer HEA Driver");
51 MODULE_VERSION(DRV_VERSION);
52
53
54 static int msg_level = -1;
55 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
56 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
57 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
58 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
59 static int use_mcs;
60 static int use_lro;
61 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
62 static int num_tx_qps = EHEA_NUM_TX_QP;
63 static int prop_carrier_state;
64
65 module_param(msg_level, int, 0);
66 module_param(rq1_entries, int, 0);
67 module_param(rq2_entries, int, 0);
68 module_param(rq3_entries, int, 0);
69 module_param(sq_entries, int, 0);
70 module_param(prop_carrier_state, int, 0);
71 module_param(use_mcs, int, 0);
72 module_param(use_lro, int, 0);
73 module_param(lro_max_aggr, int, 0);
74 module_param(num_tx_qps, int, 0);
75
76 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
77 MODULE_PARM_DESC(msg_level, "msg_level");
78 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
79 "port to stack. 1:yes, 0:no. Default = 0 ");
80 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
81 "[2^x - 1], x = [6..14]. Default = "
82 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
83 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
84 "[2^x - 1], x = [6..14]. Default = "
85 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
86 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
87 "[2^x - 1], x = [6..14]. Default = "
88 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
89 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
90 "[2^x - 1], x = [6..14]. Default = "
91 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
92 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
93
94 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
95 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
96 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
97 "Default = 0");
98
99 static int port_name_cnt;
100 static LIST_HEAD(adapter_list);
101 u64 ehea_driver_flags;
102 struct work_struct ehea_rereg_mr_task;
103 static DEFINE_MUTEX(dlpar_mem_lock);
104 struct ehea_fw_handle_array ehea_fw_handles;
105 struct ehea_bcmc_reg_array ehea_bcmc_regs;
106
107
108 static int __devinit ehea_probe_adapter(struct of_device *dev,
109 const struct of_device_id *id);
110
111 static int __devexit ehea_remove(struct of_device *dev);
112
113 static struct of_device_id ehea_device_table[] = {
114 {
115 .name = "lhea",
116 .compatible = "IBM,lhea",
117 },
118 {},
119 };
120
121 static struct of_platform_driver ehea_driver = {
122 .name = "ehea",
123 .match_table = ehea_device_table,
124 .probe = ehea_probe_adapter,
125 .remove = ehea_remove,
126 };
127
128 void ehea_dump(void *adr, int len, char *msg)
129 {
130 int x;
131 unsigned char *deb = adr;
132 for (x = 0; x < len; x += 16) {
133 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
134 deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
135 deb += 16;
136 }
137 }
138
139 static void ehea_update_firmware_handles(void)
140 {
141 struct ehea_fw_handle_entry *arr = NULL;
142 struct ehea_adapter *adapter;
143 int num_adapters = 0;
144 int num_ports = 0;
145 int num_portres = 0;
146 int i = 0;
147 int num_fw_handles, k, l;
148
149 /* Determine number of handles */
150 list_for_each_entry(adapter, &adapter_list, list) {
151 num_adapters++;
152
153 for (k = 0; k < EHEA_MAX_PORTS; k++) {
154 struct ehea_port *port = adapter->port[k];
155
156 if (!port || (port->state != EHEA_PORT_UP))
157 continue;
158
159 num_ports++;
160 num_portres += port->num_def_qps + port->num_add_tx_qps;
161 }
162 }
163
164 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
165 num_ports * EHEA_NUM_PORT_FW_HANDLES +
166 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
167
168 if (num_fw_handles) {
169 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
170 if (!arr)
171 return; /* Keep the existing array */
172 } else
173 goto out_update;
174
175 list_for_each_entry(adapter, &adapter_list, list) {
176 for (k = 0; k < EHEA_MAX_PORTS; k++) {
177 struct ehea_port *port = adapter->port[k];
178
179 if (!port || (port->state != EHEA_PORT_UP))
180 continue;
181
182 for (l = 0;
183 l < port->num_def_qps + port->num_add_tx_qps;
184 l++) {
185 struct ehea_port_res *pr = &port->port_res[l];
186
187 arr[i].adh = adapter->handle;
188 arr[i++].fwh = pr->qp->fw_handle;
189 arr[i].adh = adapter->handle;
190 arr[i++].fwh = pr->send_cq->fw_handle;
191 arr[i].adh = adapter->handle;
192 arr[i++].fwh = pr->recv_cq->fw_handle;
193 arr[i].adh = adapter->handle;
194 arr[i++].fwh = pr->eq->fw_handle;
195 arr[i].adh = adapter->handle;
196 arr[i++].fwh = pr->send_mr.handle;
197 arr[i].adh = adapter->handle;
198 arr[i++].fwh = pr->recv_mr.handle;
199 }
200 arr[i].adh = adapter->handle;
201 arr[i++].fwh = port->qp_eq->fw_handle;
202 }
203
204 arr[i].adh = adapter->handle;
205 arr[i++].fwh = adapter->neq->fw_handle;
206
207 if (adapter->mr.handle) {
208 arr[i].adh = adapter->handle;
209 arr[i++].fwh = adapter->mr.handle;
210 }
211 }
212
213 out_update:
214 kfree(ehea_fw_handles.arr);
215 ehea_fw_handles.arr = arr;
216 ehea_fw_handles.num_entries = i;
217 }
218
219 static void ehea_update_bcmc_registrations(void)
220 {
221 struct ehea_bcmc_reg_entry *arr = NULL;
222 struct ehea_adapter *adapter;
223 struct ehea_mc_list *mc_entry;
224 int num_registrations = 0;
225 int i = 0;
226 int k;
227
228 /* Determine number of registrations */
229 list_for_each_entry(adapter, &adapter_list, list)
230 for (k = 0; k < EHEA_MAX_PORTS; k++) {
231 struct ehea_port *port = adapter->port[k];
232
233 if (!port || (port->state != EHEA_PORT_UP))
234 continue;
235
236 num_registrations += 2; /* Broadcast registrations */
237
238 list_for_each_entry(mc_entry, &port->mc_list->list,list)
239 num_registrations += 2;
240 }
241
242 if (num_registrations) {
243 arr = kzalloc(num_registrations * sizeof(*arr), GFP_KERNEL);
244 if (!arr)
245 return; /* Keep the existing array */
246 } else
247 goto out_update;
248
249 list_for_each_entry(adapter, &adapter_list, list) {
250 for (k = 0; k < EHEA_MAX_PORTS; k++) {
251 struct ehea_port *port = adapter->port[k];
252
253 if (!port || (port->state != EHEA_PORT_UP))
254 continue;
255
256 arr[i].adh = adapter->handle;
257 arr[i].port_id = port->logical_port_id;
258 arr[i].reg_type = EHEA_BCMC_BROADCAST |
259 EHEA_BCMC_UNTAGGED;
260 arr[i++].macaddr = port->mac_addr;
261
262 arr[i].adh = adapter->handle;
263 arr[i].port_id = port->logical_port_id;
264 arr[i].reg_type = EHEA_BCMC_BROADCAST |
265 EHEA_BCMC_VLANID_ALL;
266 arr[i++].macaddr = port->mac_addr;
267
268 list_for_each_entry(mc_entry,
269 &port->mc_list->list, list) {
270 arr[i].adh = adapter->handle;
271 arr[i].port_id = port->logical_port_id;
272 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
273 EHEA_BCMC_MULTICAST |
274 EHEA_BCMC_UNTAGGED;
275 arr[i++].macaddr = mc_entry->macaddr;
276
277 arr[i].adh = adapter->handle;
278 arr[i].port_id = port->logical_port_id;
279 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
280 EHEA_BCMC_MULTICAST |
281 EHEA_BCMC_VLANID_ALL;
282 arr[i++].macaddr = mc_entry->macaddr;
283 }
284 }
285 }
286
287 out_update:
288 kfree(ehea_bcmc_regs.arr);
289 ehea_bcmc_regs.arr = arr;
290 ehea_bcmc_regs.num_entries = i;
291 }
292
293 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
294 {
295 struct ehea_port *port = netdev_priv(dev);
296 struct net_device_stats *stats = &port->stats;
297 struct hcp_ehea_port_cb2 *cb2;
298 u64 hret, rx_packets, tx_packets;
299 int i;
300
301 memset(stats, 0, sizeof(*stats));
302
303 cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
304 if (!cb2) {
305 ehea_error("no mem for cb2");
306 goto out;
307 }
308
309 hret = ehea_h_query_ehea_port(port->adapter->handle,
310 port->logical_port_id,
311 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
312 if (hret != H_SUCCESS) {
313 ehea_error("query_ehea_port failed");
314 goto out_herr;
315 }
316
317 if (netif_msg_hw(port))
318 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
319
320 rx_packets = 0;
321 for (i = 0; i < port->num_def_qps; i++)
322 rx_packets += port->port_res[i].rx_packets;
323
324 tx_packets = 0;
325 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
326 tx_packets += port->port_res[i].tx_packets;
327
328 stats->tx_packets = tx_packets;
329 stats->multicast = cb2->rxmcp;
330 stats->rx_errors = cb2->rxuerr;
331 stats->rx_bytes = cb2->rxo;
332 stats->tx_bytes = cb2->txo;
333 stats->rx_packets = rx_packets;
334
335 out_herr:
336 kfree(cb2);
337 out:
338 return stats;
339 }
340
341 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
342 {
343 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
344 struct net_device *dev = pr->port->netdev;
345 int max_index_mask = pr->rq1_skba.len - 1;
346 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
347 int adder = 0;
348 int i;
349
350 pr->rq1_skba.os_skbs = 0;
351
352 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
353 if (nr_of_wqes > 0)
354 pr->rq1_skba.index = index;
355 pr->rq1_skba.os_skbs = fill_wqes;
356 return;
357 }
358
359 for (i = 0; i < fill_wqes; i++) {
360 if (!skb_arr_rq1[index]) {
361 skb_arr_rq1[index] = netdev_alloc_skb(dev,
362 EHEA_L_PKT_SIZE);
363 if (!skb_arr_rq1[index]) {
364 pr->rq1_skba.os_skbs = fill_wqes - i;
365 ehea_error("%s: no mem for skb/%d wqes filled",
366 dev->name, i);
367 break;
368 }
369 }
370 index--;
371 index &= max_index_mask;
372 adder++;
373 }
374
375 if (adder == 0)
376 return;
377
378 /* Ring doorbell */
379 ehea_update_rq1a(pr->qp, adder);
380 }
381
382 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
383 {
384 int ret = 0;
385 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
386 struct net_device *dev = pr->port->netdev;
387 int i;
388
389 for (i = 0; i < pr->rq1_skba.len; i++) {
390 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
391 if (!skb_arr_rq1[i]) {
392 ehea_error("%s: no mem for skb/%d wqes filled",
393 dev->name, i);
394 ret = -ENOMEM;
395 goto out;
396 }
397 }
398 /* Ring doorbell */
399 ehea_update_rq1a(pr->qp, nr_rq1a);
400 out:
401 return ret;
402 }
403
404 static int ehea_refill_rq_def(struct ehea_port_res *pr,
405 struct ehea_q_skb_arr *q_skba, int rq_nr,
406 int num_wqes, int wqe_type, int packet_size)
407 {
408 struct net_device *dev = pr->port->netdev;
409 struct ehea_qp *qp = pr->qp;
410 struct sk_buff **skb_arr = q_skba->arr;
411 struct ehea_rwqe *rwqe;
412 int i, index, max_index_mask, fill_wqes;
413 int adder = 0;
414 int ret = 0;
415
416 fill_wqes = q_skba->os_skbs + num_wqes;
417 q_skba->os_skbs = 0;
418
419 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
420 q_skba->os_skbs = fill_wqes;
421 return ret;
422 }
423
424 index = q_skba->index;
425 max_index_mask = q_skba->len - 1;
426 for (i = 0; i < fill_wqes; i++) {
427 u64 tmp_addr;
428 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
429 if (!skb) {
430 ehea_error("%s: no mem for skb/%d wqes filled",
431 pr->port->netdev->name, i);
432 q_skba->os_skbs = fill_wqes - i;
433 ret = -ENOMEM;
434 break;
435 }
436 skb_reserve(skb, NET_IP_ALIGN);
437
438 skb_arr[index] = skb;
439 tmp_addr = ehea_map_vaddr(skb->data);
440 if (tmp_addr == -1) {
441 dev_kfree_skb(skb);
442 q_skba->os_skbs = fill_wqes - i;
443 ret = 0;
444 break;
445 }
446
447 rwqe = ehea_get_next_rwqe(qp, rq_nr);
448 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
449 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
450 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
451 rwqe->sg_list[0].vaddr = tmp_addr;
452 rwqe->sg_list[0].len = packet_size;
453 rwqe->data_segments = 1;
454
455 index++;
456 index &= max_index_mask;
457 adder++;
458 }
459
460 q_skba->index = index;
461 if (adder == 0)
462 goto out;
463
464 /* Ring doorbell */
465 iosync();
466 if (rq_nr == 2)
467 ehea_update_rq2a(pr->qp, adder);
468 else
469 ehea_update_rq3a(pr->qp, adder);
470 out:
471 return ret;
472 }
473
474
475 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
476 {
477 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
478 nr_of_wqes, EHEA_RWQE2_TYPE,
479 EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
480 }
481
482
483 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
484 {
485 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
486 nr_of_wqes, EHEA_RWQE3_TYPE,
487 EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
488 }
489
490 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
491 {
492 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
493 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
494 return 0;
495 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
496 (cqe->header_length == 0))
497 return 0;
498 return -EINVAL;
499 }
500
501 static inline void ehea_fill_skb(struct net_device *dev,
502 struct sk_buff *skb, struct ehea_cqe *cqe)
503 {
504 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
505
506 skb_put(skb, length);
507 skb->ip_summed = CHECKSUM_UNNECESSARY;
508 skb->protocol = eth_type_trans(skb, dev);
509 }
510
511 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
512 int arr_len,
513 struct ehea_cqe *cqe)
514 {
515 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
516 struct sk_buff *skb;
517 void *pref;
518 int x;
519
520 x = skb_index + 1;
521 x &= (arr_len - 1);
522
523 pref = skb_array[x];
524 prefetchw(pref);
525 prefetchw(pref + EHEA_CACHE_LINE);
526
527 pref = (skb_array[x]->data);
528 prefetch(pref);
529 prefetch(pref + EHEA_CACHE_LINE);
530 prefetch(pref + EHEA_CACHE_LINE * 2);
531 prefetch(pref + EHEA_CACHE_LINE * 3);
532 skb = skb_array[skb_index];
533 skb_array[skb_index] = NULL;
534 return skb;
535 }
536
537 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
538 int arr_len, int wqe_index)
539 {
540 struct sk_buff *skb;
541 void *pref;
542 int x;
543
544 x = wqe_index + 1;
545 x &= (arr_len - 1);
546
547 pref = skb_array[x];
548 prefetchw(pref);
549 prefetchw(pref + EHEA_CACHE_LINE);
550
551 pref = (skb_array[x]->data);
552 prefetchw(pref);
553 prefetchw(pref + EHEA_CACHE_LINE);
554
555 skb = skb_array[wqe_index];
556 skb_array[wqe_index] = NULL;
557 return skb;
558 }
559
560 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
561 struct ehea_cqe *cqe, int *processed_rq2,
562 int *processed_rq3)
563 {
564 struct sk_buff *skb;
565
566 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
567 pr->p_stats.err_tcp_cksum++;
568 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
569 pr->p_stats.err_ip_cksum++;
570 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
571 pr->p_stats.err_frame_crc++;
572
573 if (rq == 2) {
574 *processed_rq2 += 1;
575 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
576 dev_kfree_skb(skb);
577 } else if (rq == 3) {
578 *processed_rq3 += 1;
579 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
580 dev_kfree_skb(skb);
581 }
582
583 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
584 if (netif_msg_rx_err(pr->port)) {
585 ehea_error("Critical receive error for QP %d. "
586 "Resetting port.", pr->qp->init_attr.qp_nr);
587 ehea_dump(cqe, sizeof(*cqe), "CQE");
588 }
589 schedule_work(&pr->port->reset_task);
590 return 1;
591 }
592
593 return 0;
594 }
595
596 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
597 void **tcph, u64 *hdr_flags, void *priv)
598 {
599 struct ehea_cqe *cqe = priv;
600 unsigned int ip_len;
601 struct iphdr *iph;
602
603 /* non tcp/udp packets */
604 if (!cqe->header_length)
605 return -1;
606
607 /* non tcp packet */
608 skb_reset_network_header(skb);
609 iph = ip_hdr(skb);
610 if (iph->protocol != IPPROTO_TCP)
611 return -1;
612
613 ip_len = ip_hdrlen(skb);
614 skb_set_transport_header(skb, ip_len);
615 *tcph = tcp_hdr(skb);
616
617 /* check if ip header and tcp header are complete */
618 if (iph->tot_len < ip_len + tcp_hdrlen(skb))
619 return -1;
620
621 *hdr_flags = LRO_IPV4 | LRO_TCP;
622 *iphdr = iph;
623
624 return 0;
625 }
626
627 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
628 struct sk_buff *skb)
629 {
630 int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
631 && pr->port->vgrp;
632
633 if (use_lro) {
634 if (vlan_extracted)
635 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
636 pr->port->vgrp,
637 cqe->vlan_tag,
638 cqe);
639 else
640 lro_receive_skb(&pr->lro_mgr, skb, cqe);
641 } else {
642 if (vlan_extracted)
643 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
644 cqe->vlan_tag);
645 else
646 netif_receive_skb(skb);
647 }
648 }
649
650 static int ehea_proc_rwqes(struct net_device *dev,
651 struct ehea_port_res *pr,
652 int budget)
653 {
654 struct ehea_port *port = pr->port;
655 struct ehea_qp *qp = pr->qp;
656 struct ehea_cqe *cqe;
657 struct sk_buff *skb;
658 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
659 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
660 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
661 int skb_arr_rq1_len = pr->rq1_skba.len;
662 int skb_arr_rq2_len = pr->rq2_skba.len;
663 int skb_arr_rq3_len = pr->rq3_skba.len;
664 int processed, processed_rq1, processed_rq2, processed_rq3;
665 int wqe_index, last_wqe_index, rq, port_reset;
666
667 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
668 last_wqe_index = 0;
669
670 cqe = ehea_poll_rq1(qp, &wqe_index);
671 while ((processed < budget) && cqe) {
672 ehea_inc_rq1(qp);
673 processed_rq1++;
674 processed++;
675 if (netif_msg_rx_status(port))
676 ehea_dump(cqe, sizeof(*cqe), "CQE");
677
678 last_wqe_index = wqe_index;
679 rmb();
680 if (!ehea_check_cqe(cqe, &rq)) {
681 if (rq == 1) {
682 /* LL RQ1 */
683 skb = get_skb_by_index_ll(skb_arr_rq1,
684 skb_arr_rq1_len,
685 wqe_index);
686 if (unlikely(!skb)) {
687 if (netif_msg_rx_err(port))
688 ehea_error("LL rq1: skb=NULL");
689
690 skb = netdev_alloc_skb(dev,
691 EHEA_L_PKT_SIZE);
692 if (!skb)
693 break;
694 }
695 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
696 cqe->num_bytes_transfered - 4);
697 ehea_fill_skb(dev, skb, cqe);
698 } else if (rq == 2) {
699 /* RQ2 */
700 skb = get_skb_by_index(skb_arr_rq2,
701 skb_arr_rq2_len, cqe);
702 if (unlikely(!skb)) {
703 if (netif_msg_rx_err(port))
704 ehea_error("rq2: skb=NULL");
705 break;
706 }
707 ehea_fill_skb(dev, skb, cqe);
708 processed_rq2++;
709 } else {
710 /* RQ3 */
711 skb = get_skb_by_index(skb_arr_rq3,
712 skb_arr_rq3_len, cqe);
713 if (unlikely(!skb)) {
714 if (netif_msg_rx_err(port))
715 ehea_error("rq3: skb=NULL");
716 break;
717 }
718 ehea_fill_skb(dev, skb, cqe);
719 processed_rq3++;
720 }
721
722 ehea_proc_skb(pr, cqe, skb);
723 dev->last_rx = jiffies;
724 } else {
725 pr->p_stats.poll_receive_errors++;
726 port_reset = ehea_treat_poll_error(pr, rq, cqe,
727 &processed_rq2,
728 &processed_rq3);
729 if (port_reset)
730 break;
731 }
732 cqe = ehea_poll_rq1(qp, &wqe_index);
733 }
734 if (use_lro)
735 lro_flush_all(&pr->lro_mgr);
736
737 pr->rx_packets += processed;
738
739 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
740 ehea_refill_rq2(pr, processed_rq2);
741 ehea_refill_rq3(pr, processed_rq3);
742
743 return processed;
744 }
745
746 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
747 {
748 struct sk_buff *skb;
749 struct ehea_cq *send_cq = pr->send_cq;
750 struct ehea_cqe *cqe;
751 int quota = my_quota;
752 int cqe_counter = 0;
753 int swqe_av = 0;
754 int index;
755 unsigned long flags;
756
757 cqe = ehea_poll_cq(send_cq);
758 while (cqe && (quota > 0)) {
759 ehea_inc_cq(send_cq);
760
761 cqe_counter++;
762 rmb();
763 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
764 ehea_error("Send Completion Error: Resetting port");
765 if (netif_msg_tx_err(pr->port))
766 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
767 schedule_work(&pr->port->reset_task);
768 break;
769 }
770
771 if (netif_msg_tx_done(pr->port))
772 ehea_dump(cqe, sizeof(*cqe), "CQE");
773
774 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
775 == EHEA_SWQE2_TYPE)) {
776
777 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
778 skb = pr->sq_skba.arr[index];
779 dev_kfree_skb(skb);
780 pr->sq_skba.arr[index] = NULL;
781 }
782
783 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
784 quota--;
785
786 cqe = ehea_poll_cq(send_cq);
787 };
788
789 ehea_update_feca(send_cq, cqe_counter);
790 atomic_add(swqe_av, &pr->swqe_avail);
791
792 spin_lock_irqsave(&pr->netif_queue, flags);
793
794 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
795 >= pr->swqe_refill_th)) {
796 netif_wake_queue(pr->port->netdev);
797 pr->queue_stopped = 0;
798 }
799 spin_unlock_irqrestore(&pr->netif_queue, flags);
800
801 return cqe;
802 }
803
804 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
805 #define EHEA_POLL_MAX_CQES 65535
806
807 static int ehea_poll(struct napi_struct *napi, int budget)
808 {
809 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
810 napi);
811 struct net_device *dev = pr->port->netdev;
812 struct ehea_cqe *cqe;
813 struct ehea_cqe *cqe_skb = NULL;
814 int force_irq, wqe_index;
815 int rx = 0;
816
817 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
818 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
819
820 if (!force_irq)
821 rx += ehea_proc_rwqes(dev, pr, budget - rx);
822
823 while ((rx != budget) || force_irq) {
824 pr->poll_counter = 0;
825 force_irq = 0;
826 netif_rx_complete(dev, napi);
827 ehea_reset_cq_ep(pr->recv_cq);
828 ehea_reset_cq_ep(pr->send_cq);
829 ehea_reset_cq_n1(pr->recv_cq);
830 ehea_reset_cq_n1(pr->send_cq);
831 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
832 cqe_skb = ehea_poll_cq(pr->send_cq);
833
834 if (!cqe && !cqe_skb)
835 return rx;
836
837 if (!netif_rx_reschedule(dev, napi))
838 return rx;
839
840 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
841 rx += ehea_proc_rwqes(dev, pr, budget - rx);
842 }
843
844 pr->poll_counter++;
845 return rx;
846 }
847
848 #ifdef CONFIG_NET_POLL_CONTROLLER
849 static void ehea_netpoll(struct net_device *dev)
850 {
851 struct ehea_port *port = netdev_priv(dev);
852 int i;
853
854 for (i = 0; i < port->num_def_qps; i++)
855 netif_rx_schedule(dev, &port->port_res[i].napi);
856 }
857 #endif
858
859 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
860 {
861 struct ehea_port_res *pr = param;
862
863 netif_rx_schedule(pr->port->netdev, &pr->napi);
864
865 return IRQ_HANDLED;
866 }
867
868 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
869 {
870 struct ehea_port *port = param;
871 struct ehea_eqe *eqe;
872 struct ehea_qp *qp;
873 u32 qp_token;
874
875 eqe = ehea_poll_eq(port->qp_eq);
876
877 while (eqe) {
878 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
879 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
880 eqe->entry, qp_token);
881
882 qp = port->port_res[qp_token].qp;
883 ehea_error_data(port->adapter, qp->fw_handle);
884 eqe = ehea_poll_eq(port->qp_eq);
885 }
886
887 schedule_work(&port->reset_task);
888
889 return IRQ_HANDLED;
890 }
891
892 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
893 int logical_port)
894 {
895 int i;
896
897 for (i = 0; i < EHEA_MAX_PORTS; i++)
898 if (adapter->port[i])
899 if (adapter->port[i]->logical_port_id == logical_port)
900 return adapter->port[i];
901 return NULL;
902 }
903
904 int ehea_sense_port_attr(struct ehea_port *port)
905 {
906 int ret;
907 u64 hret;
908 struct hcp_ehea_port_cb0 *cb0;
909
910 /* may be called via ehea_neq_tasklet() */
911 cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
912 if (!cb0) {
913 ehea_error("no mem for cb0");
914 ret = -ENOMEM;
915 goto out;
916 }
917
918 hret = ehea_h_query_ehea_port(port->adapter->handle,
919 port->logical_port_id, H_PORT_CB0,
920 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
921 cb0);
922 if (hret != H_SUCCESS) {
923 ret = -EIO;
924 goto out_free;
925 }
926
927 /* MAC address */
928 port->mac_addr = cb0->port_mac_addr << 16;
929
930 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
931 ret = -EADDRNOTAVAIL;
932 goto out_free;
933 }
934
935 /* Port speed */
936 switch (cb0->port_speed) {
937 case H_SPEED_10M_H:
938 port->port_speed = EHEA_SPEED_10M;
939 port->full_duplex = 0;
940 break;
941 case H_SPEED_10M_F:
942 port->port_speed = EHEA_SPEED_10M;
943 port->full_duplex = 1;
944 break;
945 case H_SPEED_100M_H:
946 port->port_speed = EHEA_SPEED_100M;
947 port->full_duplex = 0;
948 break;
949 case H_SPEED_100M_F:
950 port->port_speed = EHEA_SPEED_100M;
951 port->full_duplex = 1;
952 break;
953 case H_SPEED_1G_F:
954 port->port_speed = EHEA_SPEED_1G;
955 port->full_duplex = 1;
956 break;
957 case H_SPEED_10G_F:
958 port->port_speed = EHEA_SPEED_10G;
959 port->full_duplex = 1;
960 break;
961 default:
962 port->port_speed = 0;
963 port->full_duplex = 0;
964 break;
965 }
966
967 port->autoneg = 1;
968 port->num_mcs = cb0->num_default_qps;
969
970 /* Number of default QPs */
971 if (use_mcs)
972 port->num_def_qps = cb0->num_default_qps;
973 else
974 port->num_def_qps = 1;
975
976 if (!port->num_def_qps) {
977 ret = -EINVAL;
978 goto out_free;
979 }
980
981 port->num_tx_qps = num_tx_qps;
982
983 if (port->num_def_qps >= port->num_tx_qps)
984 port->num_add_tx_qps = 0;
985 else
986 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
987
988 ret = 0;
989 out_free:
990 if (ret || netif_msg_probe(port))
991 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
992 kfree(cb0);
993 out:
994 return ret;
995 }
996
997 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
998 {
999 struct hcp_ehea_port_cb4 *cb4;
1000 u64 hret;
1001 int ret = 0;
1002
1003 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1004 if (!cb4) {
1005 ehea_error("no mem for cb4");
1006 ret = -ENOMEM;
1007 goto out;
1008 }
1009
1010 cb4->port_speed = port_speed;
1011
1012 netif_carrier_off(port->netdev);
1013
1014 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1015 port->logical_port_id,
1016 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1017 if (hret == H_SUCCESS) {
1018 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1019
1020 hret = ehea_h_query_ehea_port(port->adapter->handle,
1021 port->logical_port_id,
1022 H_PORT_CB4, H_PORT_CB4_SPEED,
1023 cb4);
1024 if (hret == H_SUCCESS) {
1025 switch (cb4->port_speed) {
1026 case H_SPEED_10M_H:
1027 port->port_speed = EHEA_SPEED_10M;
1028 port->full_duplex = 0;
1029 break;
1030 case H_SPEED_10M_F:
1031 port->port_speed = EHEA_SPEED_10M;
1032 port->full_duplex = 1;
1033 break;
1034 case H_SPEED_100M_H:
1035 port->port_speed = EHEA_SPEED_100M;
1036 port->full_duplex = 0;
1037 break;
1038 case H_SPEED_100M_F:
1039 port->port_speed = EHEA_SPEED_100M;
1040 port->full_duplex = 1;
1041 break;
1042 case H_SPEED_1G_F:
1043 port->port_speed = EHEA_SPEED_1G;
1044 port->full_duplex = 1;
1045 break;
1046 case H_SPEED_10G_F:
1047 port->port_speed = EHEA_SPEED_10G;
1048 port->full_duplex = 1;
1049 break;
1050 default:
1051 port->port_speed = 0;
1052 port->full_duplex = 0;
1053 break;
1054 }
1055 } else {
1056 ehea_error("Failed sensing port speed");
1057 ret = -EIO;
1058 }
1059 } else {
1060 if (hret == H_AUTHORITY) {
1061 ehea_info("Hypervisor denied setting port speed");
1062 ret = -EPERM;
1063 } else {
1064 ret = -EIO;
1065 ehea_error("Failed setting port speed");
1066 }
1067 }
1068 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1069 netif_carrier_on(port->netdev);
1070
1071 kfree(cb4);
1072 out:
1073 return ret;
1074 }
1075
1076 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1077 {
1078 int ret;
1079 u8 ec;
1080 u8 portnum;
1081 struct ehea_port *port;
1082
1083 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1084 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1085 port = ehea_get_port(adapter, portnum);
1086
1087 switch (ec) {
1088 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1089
1090 if (!port) {
1091 ehea_error("unknown portnum %x", portnum);
1092 break;
1093 }
1094
1095 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1096 if (!netif_carrier_ok(port->netdev)) {
1097 ret = ehea_sense_port_attr(port);
1098 if (ret) {
1099 ehea_error("failed resensing port "
1100 "attributes");
1101 break;
1102 }
1103
1104 if (netif_msg_link(port))
1105 ehea_info("%s: Logical port up: %dMbps "
1106 "%s Duplex",
1107 port->netdev->name,
1108 port->port_speed,
1109 port->full_duplex ==
1110 1 ? "Full" : "Half");
1111
1112 netif_carrier_on(port->netdev);
1113 netif_wake_queue(port->netdev);
1114 }
1115 } else
1116 if (netif_carrier_ok(port->netdev)) {
1117 if (netif_msg_link(port))
1118 ehea_info("%s: Logical port down",
1119 port->netdev->name);
1120 netif_carrier_off(port->netdev);
1121 netif_stop_queue(port->netdev);
1122 }
1123
1124 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1125 port->phy_link = EHEA_PHY_LINK_UP;
1126 if (netif_msg_link(port))
1127 ehea_info("%s: Physical port up",
1128 port->netdev->name);
1129 if (prop_carrier_state)
1130 netif_carrier_on(port->netdev);
1131 } else {
1132 port->phy_link = EHEA_PHY_LINK_DOWN;
1133 if (netif_msg_link(port))
1134 ehea_info("%s: Physical port down",
1135 port->netdev->name);
1136 if (prop_carrier_state)
1137 netif_carrier_off(port->netdev);
1138 }
1139
1140 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1141 ehea_info("External switch port is primary port");
1142 else
1143 ehea_info("External switch port is backup port");
1144
1145 break;
1146 case EHEA_EC_ADAPTER_MALFUNC:
1147 ehea_error("Adapter malfunction");
1148 break;
1149 case EHEA_EC_PORT_MALFUNC:
1150 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1151 netif_carrier_off(port->netdev);
1152 netif_stop_queue(port->netdev);
1153 break;
1154 default:
1155 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
1156 break;
1157 }
1158 }
1159
1160 static void ehea_neq_tasklet(unsigned long data)
1161 {
1162 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1163 struct ehea_eqe *eqe;
1164 u64 event_mask;
1165
1166 eqe = ehea_poll_eq(adapter->neq);
1167 ehea_debug("eqe=%p", eqe);
1168
1169 while (eqe) {
1170 ehea_debug("*eqe=%lx", eqe->entry);
1171 ehea_parse_eqe(adapter, eqe->entry);
1172 eqe = ehea_poll_eq(adapter->neq);
1173 ehea_debug("next eqe=%p", eqe);
1174 }
1175
1176 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1177 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1178 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1179
1180 ehea_h_reset_events(adapter->handle,
1181 adapter->neq->fw_handle, event_mask);
1182 }
1183
1184 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1185 {
1186 struct ehea_adapter *adapter = param;
1187 tasklet_hi_schedule(&adapter->neq_tasklet);
1188 return IRQ_HANDLED;
1189 }
1190
1191
1192 static int ehea_fill_port_res(struct ehea_port_res *pr)
1193 {
1194 int ret;
1195 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1196
1197 ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1198 - init_attr->act_nr_rwqes_rq2
1199 - init_attr->act_nr_rwqes_rq3 - 1);
1200
1201 ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1202
1203 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1204
1205 return ret;
1206 }
1207
1208 static int ehea_reg_interrupts(struct net_device *dev)
1209 {
1210 struct ehea_port *port = netdev_priv(dev);
1211 struct ehea_port_res *pr;
1212 int i, ret;
1213
1214
1215 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1216 dev->name);
1217
1218 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1219 ehea_qp_aff_irq_handler,
1220 IRQF_DISABLED, port->int_aff_name, port);
1221 if (ret) {
1222 ehea_error("failed registering irq for qp_aff_irq_handler:"
1223 "ist=%X", port->qp_eq->attr.ist1);
1224 goto out_free_qpeq;
1225 }
1226
1227 if (netif_msg_ifup(port))
1228 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1229 "registered", port->qp_eq->attr.ist1);
1230
1231
1232 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1233 pr = &port->port_res[i];
1234 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1235 "%s-queue%d", dev->name, i);
1236 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1237 ehea_recv_irq_handler,
1238 IRQF_DISABLED, pr->int_send_name,
1239 pr);
1240 if (ret) {
1241 ehea_error("failed registering irq for ehea_queue "
1242 "port_res_nr:%d, ist=%X", i,
1243 pr->eq->attr.ist1);
1244 goto out_free_req;
1245 }
1246 if (netif_msg_ifup(port))
1247 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1248 "%d registered", pr->eq->attr.ist1, i);
1249 }
1250 out:
1251 return ret;
1252
1253
1254 out_free_req:
1255 while (--i >= 0) {
1256 u32 ist = port->port_res[i].eq->attr.ist1;
1257 ibmebus_free_irq(ist, &port->port_res[i]);
1258 }
1259
1260 out_free_qpeq:
1261 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1262 i = port->num_def_qps;
1263
1264 goto out;
1265
1266 }
1267
1268 static void ehea_free_interrupts(struct net_device *dev)
1269 {
1270 struct ehea_port *port = netdev_priv(dev);
1271 struct ehea_port_res *pr;
1272 int i;
1273
1274 /* send */
1275
1276 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1277 pr = &port->port_res[i];
1278 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1279 if (netif_msg_intr(port))
1280 ehea_info("free send irq for res %d with handle 0x%X",
1281 i, pr->eq->attr.ist1);
1282 }
1283
1284 /* associated events */
1285 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1286 if (netif_msg_intr(port))
1287 ehea_info("associated event interrupt for handle 0x%X freed",
1288 port->qp_eq->attr.ist1);
1289 }
1290
1291 static int ehea_configure_port(struct ehea_port *port)
1292 {
1293 int ret, i;
1294 u64 hret, mask;
1295 struct hcp_ehea_port_cb0 *cb0;
1296
1297 ret = -ENOMEM;
1298 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1299 if (!cb0)
1300 goto out;
1301
1302 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1303 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1304 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1305 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1306 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1307 PXLY_RC_VLAN_FILTER)
1308 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1309
1310 for (i = 0; i < port->num_mcs; i++)
1311 if (use_mcs)
1312 cb0->default_qpn_arr[i] =
1313 port->port_res[i].qp->init_attr.qp_nr;
1314 else
1315 cb0->default_qpn_arr[i] =
1316 port->port_res[0].qp->init_attr.qp_nr;
1317
1318 if (netif_msg_ifup(port))
1319 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1320
1321 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1322 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1323
1324 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1325 port->logical_port_id,
1326 H_PORT_CB0, mask, cb0);
1327 ret = -EIO;
1328 if (hret != H_SUCCESS)
1329 goto out_free;
1330
1331 ret = 0;
1332
1333 out_free:
1334 kfree(cb0);
1335 out:
1336 return ret;
1337 }
1338
1339 int ehea_gen_smrs(struct ehea_port_res *pr)
1340 {
1341 int ret;
1342 struct ehea_adapter *adapter = pr->port->adapter;
1343
1344 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1345 if (ret)
1346 goto out;
1347
1348 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1349 if (ret)
1350 goto out_free;
1351
1352 return 0;
1353
1354 out_free:
1355 ehea_rem_mr(&pr->send_mr);
1356 out:
1357 ehea_error("Generating SMRS failed\n");
1358 return -EIO;
1359 }
1360
1361 int ehea_rem_smrs(struct ehea_port_res *pr)
1362 {
1363 if ((ehea_rem_mr(&pr->send_mr))
1364 || (ehea_rem_mr(&pr->recv_mr)))
1365 return -EIO;
1366 else
1367 return 0;
1368 }
1369
1370 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1371 {
1372 int arr_size = sizeof(void *) * max_q_entries;
1373
1374 q_skba->arr = vmalloc(arr_size);
1375 if (!q_skba->arr)
1376 return -ENOMEM;
1377
1378 memset(q_skba->arr, 0, arr_size);
1379
1380 q_skba->len = max_q_entries;
1381 q_skba->index = 0;
1382 q_skba->os_skbs = 0;
1383
1384 return 0;
1385 }
1386
1387 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1388 struct port_res_cfg *pr_cfg, int queue_token)
1389 {
1390 struct ehea_adapter *adapter = port->adapter;
1391 enum ehea_eq_type eq_type = EHEA_EQ;
1392 struct ehea_qp_init_attr *init_attr = NULL;
1393 int ret = -EIO;
1394
1395 memset(pr, 0, sizeof(struct ehea_port_res));
1396
1397 pr->port = port;
1398 spin_lock_init(&pr->xmit_lock);
1399 spin_lock_init(&pr->netif_queue);
1400
1401 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1402 if (!pr->eq) {
1403 ehea_error("create_eq failed (eq)");
1404 goto out_free;
1405 }
1406
1407 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1408 pr->eq->fw_handle,
1409 port->logical_port_id);
1410 if (!pr->recv_cq) {
1411 ehea_error("create_cq failed (cq_recv)");
1412 goto out_free;
1413 }
1414
1415 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1416 pr->eq->fw_handle,
1417 port->logical_port_id);
1418 if (!pr->send_cq) {
1419 ehea_error("create_cq failed (cq_send)");
1420 goto out_free;
1421 }
1422
1423 if (netif_msg_ifup(port))
1424 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1425 pr->send_cq->attr.act_nr_of_cqes,
1426 pr->recv_cq->attr.act_nr_of_cqes);
1427
1428 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1429 if (!init_attr) {
1430 ret = -ENOMEM;
1431 ehea_error("no mem for ehea_qp_init_attr");
1432 goto out_free;
1433 }
1434
1435 init_attr->low_lat_rq1 = 1;
1436 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1437 init_attr->rq_count = 3;
1438 init_attr->qp_token = queue_token;
1439 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1440 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1441 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1442 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1443 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1444 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1445 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1446 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1447 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1448 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1449 init_attr->port_nr = port->logical_port_id;
1450 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1451 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1452 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1453
1454 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1455 if (!pr->qp) {
1456 ehea_error("create_qp failed");
1457 ret = -EIO;
1458 goto out_free;
1459 }
1460
1461 if (netif_msg_ifup(port))
1462 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1463 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1464 init_attr->act_nr_send_wqes,
1465 init_attr->act_nr_rwqes_rq1,
1466 init_attr->act_nr_rwqes_rq2,
1467 init_attr->act_nr_rwqes_rq3);
1468
1469 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1470
1471 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1472 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1473 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1474 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1475 if (ret)
1476 goto out_free;
1477
1478 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1479 if (ehea_gen_smrs(pr) != 0) {
1480 ret = -EIO;
1481 goto out_free;
1482 }
1483
1484 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1485
1486 kfree(init_attr);
1487
1488 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1489
1490 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1491 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1492 pr->lro_mgr.lro_arr = pr->lro_desc;
1493 pr->lro_mgr.get_skb_header = get_skb_hdr;
1494 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1495 pr->lro_mgr.dev = port->netdev;
1496 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1497 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1498
1499 ret = 0;
1500 goto out;
1501
1502 out_free:
1503 kfree(init_attr);
1504 vfree(pr->sq_skba.arr);
1505 vfree(pr->rq1_skba.arr);
1506 vfree(pr->rq2_skba.arr);
1507 vfree(pr->rq3_skba.arr);
1508 ehea_destroy_qp(pr->qp);
1509 ehea_destroy_cq(pr->send_cq);
1510 ehea_destroy_cq(pr->recv_cq);
1511 ehea_destroy_eq(pr->eq);
1512 out:
1513 return ret;
1514 }
1515
1516 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1517 {
1518 int ret, i;
1519
1520 ret = ehea_destroy_qp(pr->qp);
1521
1522 if (!ret) {
1523 ehea_destroy_cq(pr->send_cq);
1524 ehea_destroy_cq(pr->recv_cq);
1525 ehea_destroy_eq(pr->eq);
1526
1527 for (i = 0; i < pr->rq1_skba.len; i++)
1528 if (pr->rq1_skba.arr[i])
1529 dev_kfree_skb(pr->rq1_skba.arr[i]);
1530
1531 for (i = 0; i < pr->rq2_skba.len; i++)
1532 if (pr->rq2_skba.arr[i])
1533 dev_kfree_skb(pr->rq2_skba.arr[i]);
1534
1535 for (i = 0; i < pr->rq3_skba.len; i++)
1536 if (pr->rq3_skba.arr[i])
1537 dev_kfree_skb(pr->rq3_skba.arr[i]);
1538
1539 for (i = 0; i < pr->sq_skba.len; i++)
1540 if (pr->sq_skba.arr[i])
1541 dev_kfree_skb(pr->sq_skba.arr[i]);
1542
1543 vfree(pr->rq1_skba.arr);
1544 vfree(pr->rq2_skba.arr);
1545 vfree(pr->rq3_skba.arr);
1546 vfree(pr->sq_skba.arr);
1547 ret = ehea_rem_smrs(pr);
1548 }
1549 return ret;
1550 }
1551
1552 /*
1553 * The write_* functions store information in swqe which is used by
1554 * the hardware to calculate the ip/tcp/udp checksum
1555 */
1556
1557 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1558 const struct sk_buff *skb)
1559 {
1560 swqe->ip_start = skb_network_offset(skb);
1561 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1562 }
1563
1564 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1565 const struct sk_buff *skb)
1566 {
1567 swqe->tcp_offset =
1568 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1569
1570 swqe->tcp_end = (u16)skb->len - 1;
1571 }
1572
1573 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1574 const struct sk_buff *skb)
1575 {
1576 swqe->tcp_offset =
1577 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1578
1579 swqe->tcp_end = (u16)skb->len - 1;
1580 }
1581
1582
1583 static void write_swqe2_TSO(struct sk_buff *skb,
1584 struct ehea_swqe *swqe, u32 lkey)
1585 {
1586 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1587 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1588 int skb_data_size = skb->len - skb->data_len;
1589 int headersize;
1590
1591 /* Packet is TCP with TSO enabled */
1592 swqe->tx_control |= EHEA_SWQE_TSO;
1593 swqe->mss = skb_shinfo(skb)->gso_size;
1594 /* copy only eth/ip/tcp headers to immediate data and
1595 * the rest of skb->data to sg1entry
1596 */
1597 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1598
1599 skb_data_size = skb->len - skb->data_len;
1600
1601 if (skb_data_size >= headersize) {
1602 /* copy immediate data */
1603 skb_copy_from_linear_data(skb, imm_data, headersize);
1604 swqe->immediate_data_length = headersize;
1605
1606 if (skb_data_size > headersize) {
1607 /* set sg1entry data */
1608 sg1entry->l_key = lkey;
1609 sg1entry->len = skb_data_size - headersize;
1610 sg1entry->vaddr =
1611 ehea_map_vaddr(skb->data + headersize);
1612 swqe->descriptors++;
1613 }
1614 } else
1615 ehea_error("cannot handle fragmented headers");
1616 }
1617
1618 static void write_swqe2_nonTSO(struct sk_buff *skb,
1619 struct ehea_swqe *swqe, u32 lkey)
1620 {
1621 int skb_data_size = skb->len - skb->data_len;
1622 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1623 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1624
1625 /* Packet is any nonTSO type
1626 *
1627 * Copy as much as possible skb->data to immediate data and
1628 * the rest to sg1entry
1629 */
1630 if (skb_data_size >= SWQE2_MAX_IMM) {
1631 /* copy immediate data */
1632 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1633
1634 swqe->immediate_data_length = SWQE2_MAX_IMM;
1635
1636 if (skb_data_size > SWQE2_MAX_IMM) {
1637 /* copy sg1entry data */
1638 sg1entry->l_key = lkey;
1639 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1640 sg1entry->vaddr =
1641 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1642 swqe->descriptors++;
1643 }
1644 } else {
1645 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1646 swqe->immediate_data_length = skb_data_size;
1647 }
1648 }
1649
1650 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1651 struct ehea_swqe *swqe, u32 lkey)
1652 {
1653 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1654 skb_frag_t *frag;
1655 int nfrags, sg1entry_contains_frag_data, i;
1656
1657 nfrags = skb_shinfo(skb)->nr_frags;
1658 sg1entry = &swqe->u.immdata_desc.sg_entry;
1659 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1660 swqe->descriptors = 0;
1661 sg1entry_contains_frag_data = 0;
1662
1663 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1664 write_swqe2_TSO(skb, swqe, lkey);
1665 else
1666 write_swqe2_nonTSO(skb, swqe, lkey);
1667
1668 /* write descriptors */
1669 if (nfrags > 0) {
1670 if (swqe->descriptors == 0) {
1671 /* sg1entry not yet used */
1672 frag = &skb_shinfo(skb)->frags[0];
1673
1674 /* copy sg1entry data */
1675 sg1entry->l_key = lkey;
1676 sg1entry->len = frag->size;
1677 sg1entry->vaddr =
1678 ehea_map_vaddr(page_address(frag->page)
1679 + frag->page_offset);
1680 swqe->descriptors++;
1681 sg1entry_contains_frag_data = 1;
1682 }
1683
1684 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1685
1686 frag = &skb_shinfo(skb)->frags[i];
1687 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1688
1689 sgentry->l_key = lkey;
1690 sgentry->len = frag->size;
1691 sgentry->vaddr =
1692 ehea_map_vaddr(page_address(frag->page)
1693 + frag->page_offset);
1694 swqe->descriptors++;
1695 }
1696 }
1697 }
1698
1699 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1700 {
1701 int ret = 0;
1702 u64 hret;
1703 u8 reg_type;
1704
1705 /* De/Register untagged packets */
1706 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1707 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1708 port->logical_port_id,
1709 reg_type, port->mac_addr, 0, hcallid);
1710 if (hret != H_SUCCESS) {
1711 ehea_error("%sregistering bc address failed (tagged)",
1712 hcallid == H_REG_BCMC ? "" : "de");
1713 ret = -EIO;
1714 goto out_herr;
1715 }
1716
1717 /* De/Register VLAN packets */
1718 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1719 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1720 port->logical_port_id,
1721 reg_type, port->mac_addr, 0, hcallid);
1722 if (hret != H_SUCCESS) {
1723 ehea_error("%sregistering bc address failed (vlan)",
1724 hcallid == H_REG_BCMC ? "" : "de");
1725 ret = -EIO;
1726 }
1727 out_herr:
1728 return ret;
1729 }
1730
1731 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1732 {
1733 struct ehea_port *port = netdev_priv(dev);
1734 struct sockaddr *mac_addr = sa;
1735 struct hcp_ehea_port_cb0 *cb0;
1736 int ret;
1737 u64 hret;
1738
1739 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1740 ret = -EADDRNOTAVAIL;
1741 goto out;
1742 }
1743
1744 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1745 if (!cb0) {
1746 ehea_error("no mem for cb0");
1747 ret = -ENOMEM;
1748 goto out;
1749 }
1750
1751 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1752
1753 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1754
1755 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1756 port->logical_port_id, H_PORT_CB0,
1757 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1758 if (hret != H_SUCCESS) {
1759 ret = -EIO;
1760 goto out_free;
1761 }
1762
1763 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1764
1765 mutex_lock(&ehea_bcmc_regs.lock);
1766
1767 /* Deregister old MAC in pHYP */
1768 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1769 if (ret)
1770 goto out_upregs;
1771
1772 port->mac_addr = cb0->port_mac_addr << 16;
1773
1774 /* Register new MAC in pHYP */
1775 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1776 if (ret)
1777 goto out_upregs;
1778
1779 ret = 0;
1780
1781 out_upregs:
1782 ehea_update_bcmc_registrations();
1783 mutex_unlock(&ehea_bcmc_regs.lock);
1784 out_free:
1785 kfree(cb0);
1786 out:
1787 return ret;
1788 }
1789
1790 static void ehea_promiscuous_error(u64 hret, int enable)
1791 {
1792 if (hret == H_AUTHORITY)
1793 ehea_info("Hypervisor denied %sabling promiscuous mode",
1794 enable == 1 ? "en" : "dis");
1795 else
1796 ehea_error("failed %sabling promiscuous mode",
1797 enable == 1 ? "en" : "dis");
1798 }
1799
1800 static void ehea_promiscuous(struct net_device *dev, int enable)
1801 {
1802 struct ehea_port *port = netdev_priv(dev);
1803 struct hcp_ehea_port_cb7 *cb7;
1804 u64 hret;
1805
1806 if ((enable && port->promisc) || (!enable && !port->promisc))
1807 return;
1808
1809 cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1810 if (!cb7) {
1811 ehea_error("no mem for cb7");
1812 goto out;
1813 }
1814
1815 /* Modify Pxs_DUCQPN in CB7 */
1816 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1817
1818 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1819 port->logical_port_id,
1820 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1821 if (hret) {
1822 ehea_promiscuous_error(hret, enable);
1823 goto out;
1824 }
1825
1826 port->promisc = enable;
1827 out:
1828 kfree(cb7);
1829 return;
1830 }
1831
1832 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1833 u32 hcallid)
1834 {
1835 u64 hret;
1836 u8 reg_type;
1837
1838 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1839 | EHEA_BCMC_UNTAGGED;
1840
1841 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1842 port->logical_port_id,
1843 reg_type, mc_mac_addr, 0, hcallid);
1844 if (hret)
1845 goto out;
1846
1847 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1848 | EHEA_BCMC_VLANID_ALL;
1849
1850 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1851 port->logical_port_id,
1852 reg_type, mc_mac_addr, 0, hcallid);
1853 out:
1854 return hret;
1855 }
1856
1857 static int ehea_drop_multicast_list(struct net_device *dev)
1858 {
1859 struct ehea_port *port = netdev_priv(dev);
1860 struct ehea_mc_list *mc_entry = port->mc_list;
1861 struct list_head *pos;
1862 struct list_head *temp;
1863 int ret = 0;
1864 u64 hret;
1865
1866 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1867 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1868
1869 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1870 H_DEREG_BCMC);
1871 if (hret) {
1872 ehea_error("failed deregistering mcast MAC");
1873 ret = -EIO;
1874 }
1875
1876 list_del(pos);
1877 kfree(mc_entry);
1878 }
1879 return ret;
1880 }
1881
1882 static void ehea_allmulti(struct net_device *dev, int enable)
1883 {
1884 struct ehea_port *port = netdev_priv(dev);
1885 u64 hret;
1886
1887 if (!port->allmulti) {
1888 if (enable) {
1889 /* Enable ALLMULTI */
1890 ehea_drop_multicast_list(dev);
1891 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1892 if (!hret)
1893 port->allmulti = 1;
1894 else
1895 ehea_error("failed enabling IFF_ALLMULTI");
1896 }
1897 } else
1898 if (!enable) {
1899 /* Disable ALLMULTI */
1900 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1901 if (!hret)
1902 port->allmulti = 0;
1903 else
1904 ehea_error("failed disabling IFF_ALLMULTI");
1905 }
1906 }
1907
1908 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1909 {
1910 struct ehea_mc_list *ehea_mcl_entry;
1911 u64 hret;
1912
1913 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1914 if (!ehea_mcl_entry) {
1915 ehea_error("no mem for mcl_entry");
1916 return;
1917 }
1918
1919 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1920
1921 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1922
1923 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1924 H_REG_BCMC);
1925 if (!hret)
1926 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1927 else {
1928 ehea_error("failed registering mcast MAC");
1929 kfree(ehea_mcl_entry);
1930 }
1931 }
1932
1933 static void ehea_set_multicast_list(struct net_device *dev)
1934 {
1935 struct ehea_port *port = netdev_priv(dev);
1936 struct dev_mc_list *k_mcl_entry;
1937 int ret, i;
1938
1939 if (dev->flags & IFF_PROMISC) {
1940 ehea_promiscuous(dev, 1);
1941 return;
1942 }
1943 ehea_promiscuous(dev, 0);
1944
1945 mutex_lock(&ehea_bcmc_regs.lock);
1946
1947 if (dev->flags & IFF_ALLMULTI) {
1948 ehea_allmulti(dev, 1);
1949 goto out;
1950 }
1951 ehea_allmulti(dev, 0);
1952
1953 if (dev->mc_count) {
1954 ret = ehea_drop_multicast_list(dev);
1955 if (ret) {
1956 /* Dropping the current multicast list failed.
1957 * Enabling ALL_MULTI is the best we can do.
1958 */
1959 ehea_allmulti(dev, 1);
1960 }
1961
1962 if (dev->mc_count > port->adapter->max_mc_mac) {
1963 ehea_info("Mcast registration limit reached (0x%lx). "
1964 "Use ALLMULTI!",
1965 port->adapter->max_mc_mac);
1966 goto out;
1967 }
1968
1969 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
1970 k_mcl_entry = k_mcl_entry->next)
1971 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1972
1973 }
1974 out:
1975 ehea_update_bcmc_registrations();
1976 mutex_unlock(&ehea_bcmc_regs.lock);
1977 return;
1978 }
1979
1980 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1981 {
1982 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1983 return -EINVAL;
1984 dev->mtu = new_mtu;
1985 return 0;
1986 }
1987
1988 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1989 struct ehea_swqe *swqe, u32 lkey)
1990 {
1991 if (skb->protocol == htons(ETH_P_IP)) {
1992 const struct iphdr *iph = ip_hdr(skb);
1993
1994 /* IPv4 */
1995 swqe->tx_control |= EHEA_SWQE_CRC
1996 | EHEA_SWQE_IP_CHECKSUM
1997 | EHEA_SWQE_TCP_CHECKSUM
1998 | EHEA_SWQE_IMM_DATA_PRESENT
1999 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2000
2001 write_ip_start_end(swqe, skb);
2002
2003 if (iph->protocol == IPPROTO_UDP) {
2004 if ((iph->frag_off & IP_MF)
2005 || (iph->frag_off & IP_OFFSET))
2006 /* IP fragment, so don't change cs */
2007 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2008 else
2009 write_udp_offset_end(swqe, skb);
2010 } else if (iph->protocol == IPPROTO_TCP) {
2011 write_tcp_offset_end(swqe, skb);
2012 }
2013
2014 /* icmp (big data) and ip segmentation packets (all other ip
2015 packets) do not require any special handling */
2016
2017 } else {
2018 /* Other Ethernet Protocol */
2019 swqe->tx_control |= EHEA_SWQE_CRC
2020 | EHEA_SWQE_IMM_DATA_PRESENT
2021 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2022 }
2023
2024 write_swqe2_data(skb, dev, swqe, lkey);
2025 }
2026
2027 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2028 struct ehea_swqe *swqe)
2029 {
2030 int nfrags = skb_shinfo(skb)->nr_frags;
2031 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2032 skb_frag_t *frag;
2033 int i;
2034
2035 if (skb->protocol == htons(ETH_P_IP)) {
2036 const struct iphdr *iph = ip_hdr(skb);
2037
2038 /* IPv4 */
2039 write_ip_start_end(swqe, skb);
2040
2041 if (iph->protocol == IPPROTO_TCP) {
2042 swqe->tx_control |= EHEA_SWQE_CRC
2043 | EHEA_SWQE_IP_CHECKSUM
2044 | EHEA_SWQE_TCP_CHECKSUM
2045 | EHEA_SWQE_IMM_DATA_PRESENT;
2046
2047 write_tcp_offset_end(swqe, skb);
2048
2049 } else if (iph->protocol == IPPROTO_UDP) {
2050 if ((iph->frag_off & IP_MF)
2051 || (iph->frag_off & IP_OFFSET))
2052 /* IP fragment, so don't change cs */
2053 swqe->tx_control |= EHEA_SWQE_CRC
2054 | EHEA_SWQE_IMM_DATA_PRESENT;
2055 else {
2056 swqe->tx_control |= EHEA_SWQE_CRC
2057 | EHEA_SWQE_IP_CHECKSUM
2058 | EHEA_SWQE_TCP_CHECKSUM
2059 | EHEA_SWQE_IMM_DATA_PRESENT;
2060
2061 write_udp_offset_end(swqe, skb);
2062 }
2063 } else {
2064 /* icmp (big data) and
2065 ip segmentation packets (all other ip packets) */
2066 swqe->tx_control |= EHEA_SWQE_CRC
2067 | EHEA_SWQE_IP_CHECKSUM
2068 | EHEA_SWQE_IMM_DATA_PRESENT;
2069 }
2070 } else {
2071 /* Other Ethernet Protocol */
2072 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2073 }
2074 /* copy (immediate) data */
2075 if (nfrags == 0) {
2076 /* data is in a single piece */
2077 skb_copy_from_linear_data(skb, imm_data, skb->len);
2078 } else {
2079 /* first copy data from the skb->data buffer ... */
2080 skb_copy_from_linear_data(skb, imm_data,
2081 skb->len - skb->data_len);
2082 imm_data += skb->len - skb->data_len;
2083
2084 /* ... then copy data from the fragments */
2085 for (i = 0; i < nfrags; i++) {
2086 frag = &skb_shinfo(skb)->frags[i];
2087 memcpy(imm_data,
2088 page_address(frag->page) + frag->page_offset,
2089 frag->size);
2090 imm_data += frag->size;
2091 }
2092 }
2093 swqe->immediate_data_length = skb->len;
2094 dev_kfree_skb(skb);
2095 }
2096
2097 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2098 {
2099 struct tcphdr *tcp;
2100 u32 tmp;
2101
2102 if ((skb->protocol == htons(ETH_P_IP)) &&
2103 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2104 tcp = (struct tcphdr *)(skb_network_header(skb) +
2105 (ip_hdr(skb)->ihl * 4));
2106 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2107 tmp += ip_hdr(skb)->daddr % 31;
2108 return tmp % num_qps;
2109 } else
2110 return 0;
2111 }
2112
2113 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2114 {
2115 struct ehea_port *port = netdev_priv(dev);
2116 struct ehea_swqe *swqe;
2117 unsigned long flags;
2118 u32 lkey;
2119 int swqe_index;
2120 struct ehea_port_res *pr;
2121
2122 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2123
2124 if (!spin_trylock(&pr->xmit_lock))
2125 return NETDEV_TX_BUSY;
2126
2127 if (pr->queue_stopped) {
2128 spin_unlock(&pr->xmit_lock);
2129 return NETDEV_TX_BUSY;
2130 }
2131
2132 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2133 memset(swqe, 0, SWQE_HEADER_SIZE);
2134 atomic_dec(&pr->swqe_avail);
2135
2136 if (skb->len <= SWQE3_MAX_IMM) {
2137 u32 sig_iv = port->sig_comp_iv;
2138 u32 swqe_num = pr->swqe_id_counter;
2139 ehea_xmit3(skb, dev, swqe);
2140 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2141 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2142 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2143 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2144 sig_iv);
2145 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2146 pr->swqe_ll_count = 0;
2147 } else
2148 pr->swqe_ll_count += 1;
2149 } else {
2150 swqe->wr_id =
2151 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2152 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2153 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2154 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2155 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2156
2157 pr->sq_skba.index++;
2158 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2159
2160 lkey = pr->send_mr.lkey;
2161 ehea_xmit2(skb, dev, swqe, lkey);
2162 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2163 }
2164 pr->swqe_id_counter += 1;
2165
2166 if (port->vgrp && vlan_tx_tag_present(skb)) {
2167 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2168 swqe->vlan_tag = vlan_tx_tag_get(skb);
2169 }
2170
2171 if (netif_msg_tx_queued(port)) {
2172 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2173 ehea_dump(swqe, 512, "swqe");
2174 }
2175
2176 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2177 netif_stop_queue(dev);
2178 swqe->tx_control |= EHEA_SWQE_PURGE;
2179 }
2180
2181 ehea_post_swqe(pr->qp, swqe);
2182 pr->tx_packets++;
2183
2184 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2185 spin_lock_irqsave(&pr->netif_queue, flags);
2186 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2187 pr->p_stats.queue_stopped++;
2188 netif_stop_queue(dev);
2189 pr->queue_stopped = 1;
2190 }
2191 spin_unlock_irqrestore(&pr->netif_queue, flags);
2192 }
2193 dev->trans_start = jiffies;
2194 spin_unlock(&pr->xmit_lock);
2195
2196 return NETDEV_TX_OK;
2197 }
2198
2199 static void ehea_vlan_rx_register(struct net_device *dev,
2200 struct vlan_group *grp)
2201 {
2202 struct ehea_port *port = netdev_priv(dev);
2203 struct ehea_adapter *adapter = port->adapter;
2204 struct hcp_ehea_port_cb1 *cb1;
2205 u64 hret;
2206
2207 port->vgrp = grp;
2208
2209 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2210 if (!cb1) {
2211 ehea_error("no mem for cb1");
2212 goto out;
2213 }
2214
2215 memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
2216
2217 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2218 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2219 if (hret != H_SUCCESS)
2220 ehea_error("modify_ehea_port failed");
2221
2222 kfree(cb1);
2223 out:
2224 return;
2225 }
2226
2227 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2228 {
2229 struct ehea_port *port = netdev_priv(dev);
2230 struct ehea_adapter *adapter = port->adapter;
2231 struct hcp_ehea_port_cb1 *cb1;
2232 int index;
2233 u64 hret;
2234
2235 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2236 if (!cb1) {
2237 ehea_error("no mem for cb1");
2238 goto out;
2239 }
2240
2241 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2242 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2243 if (hret != H_SUCCESS) {
2244 ehea_error("query_ehea_port failed");
2245 goto out;
2246 }
2247
2248 index = (vid / 64);
2249 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2250
2251 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2252 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2253 if (hret != H_SUCCESS)
2254 ehea_error("modify_ehea_port failed");
2255 out:
2256 kfree(cb1);
2257 return;
2258 }
2259
2260 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2261 {
2262 struct ehea_port *port = netdev_priv(dev);
2263 struct ehea_adapter *adapter = port->adapter;
2264 struct hcp_ehea_port_cb1 *cb1;
2265 int index;
2266 u64 hret;
2267
2268 vlan_group_set_device(port->vgrp, vid, NULL);
2269
2270 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2271 if (!cb1) {
2272 ehea_error("no mem for cb1");
2273 goto out;
2274 }
2275
2276 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2277 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2278 if (hret != H_SUCCESS) {
2279 ehea_error("query_ehea_port failed");
2280 goto out;
2281 }
2282
2283 index = (vid / 64);
2284 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2285
2286 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2287 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2288 if (hret != H_SUCCESS)
2289 ehea_error("modify_ehea_port failed");
2290 out:
2291 kfree(cb1);
2292 return;
2293 }
2294
2295 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2296 {
2297 int ret = -EIO;
2298 u64 hret;
2299 u16 dummy16 = 0;
2300 u64 dummy64 = 0;
2301 struct hcp_modify_qp_cb0 *cb0;
2302
2303 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2304 if (!cb0) {
2305 ret = -ENOMEM;
2306 goto out;
2307 }
2308
2309 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2310 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2311 if (hret != H_SUCCESS) {
2312 ehea_error("query_ehea_qp failed (1)");
2313 goto out;
2314 }
2315
2316 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2317 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2318 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2319 &dummy64, &dummy64, &dummy16, &dummy16);
2320 if (hret != H_SUCCESS) {
2321 ehea_error("modify_ehea_qp failed (1)");
2322 goto out;
2323 }
2324
2325 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2326 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2327 if (hret != H_SUCCESS) {
2328 ehea_error("query_ehea_qp failed (2)");
2329 goto out;
2330 }
2331
2332 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2333 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2334 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2335 &dummy64, &dummy64, &dummy16, &dummy16);
2336 if (hret != H_SUCCESS) {
2337 ehea_error("modify_ehea_qp failed (2)");
2338 goto out;
2339 }
2340
2341 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2342 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2343 if (hret != H_SUCCESS) {
2344 ehea_error("query_ehea_qp failed (3)");
2345 goto out;
2346 }
2347
2348 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2349 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2350 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2351 &dummy64, &dummy64, &dummy16, &dummy16);
2352 if (hret != H_SUCCESS) {
2353 ehea_error("modify_ehea_qp failed (3)");
2354 goto out;
2355 }
2356
2357 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2358 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2359 if (hret != H_SUCCESS) {
2360 ehea_error("query_ehea_qp failed (4)");
2361 goto out;
2362 }
2363
2364 ret = 0;
2365 out:
2366 kfree(cb0);
2367 return ret;
2368 }
2369
2370 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2371 int add_tx_qps)
2372 {
2373 int ret, i;
2374 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2375 enum ehea_eq_type eq_type = EHEA_EQ;
2376
2377 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2378 EHEA_MAX_ENTRIES_EQ, 1);
2379 if (!port->qp_eq) {
2380 ret = -EINVAL;
2381 ehea_error("ehea_create_eq failed (qp_eq)");
2382 goto out_kill_eq;
2383 }
2384
2385 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2386 pr_cfg.max_entries_scq = sq_entries * 2;
2387 pr_cfg.max_entries_sq = sq_entries;
2388 pr_cfg.max_entries_rq1 = rq1_entries;
2389 pr_cfg.max_entries_rq2 = rq2_entries;
2390 pr_cfg.max_entries_rq3 = rq3_entries;
2391
2392 pr_cfg_small_rx.max_entries_rcq = 1;
2393 pr_cfg_small_rx.max_entries_scq = sq_entries;
2394 pr_cfg_small_rx.max_entries_sq = sq_entries;
2395 pr_cfg_small_rx.max_entries_rq1 = 1;
2396 pr_cfg_small_rx.max_entries_rq2 = 1;
2397 pr_cfg_small_rx.max_entries_rq3 = 1;
2398
2399 for (i = 0; i < def_qps; i++) {
2400 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2401 if (ret)
2402 goto out_clean_pr;
2403 }
2404 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2405 ret = ehea_init_port_res(port, &port->port_res[i],
2406 &pr_cfg_small_rx, i);
2407 if (ret)
2408 goto out_clean_pr;
2409 }
2410
2411 return 0;
2412
2413 out_clean_pr:
2414 while (--i >= 0)
2415 ehea_clean_portres(port, &port->port_res[i]);
2416
2417 out_kill_eq:
2418 ehea_destroy_eq(port->qp_eq);
2419 return ret;
2420 }
2421
2422 static int ehea_clean_all_portres(struct ehea_port *port)
2423 {
2424 int ret = 0;
2425 int i;
2426
2427 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2428 ret |= ehea_clean_portres(port, &port->port_res[i]);
2429
2430 ret |= ehea_destroy_eq(port->qp_eq);
2431
2432 return ret;
2433 }
2434
2435 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2436 {
2437 if (adapter->active_ports)
2438 return;
2439
2440 ehea_rem_mr(&adapter->mr);
2441 }
2442
2443 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2444 {
2445 if (adapter->active_ports)
2446 return 0;
2447
2448 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2449 }
2450
2451 static int ehea_up(struct net_device *dev)
2452 {
2453 int ret, i;
2454 struct ehea_port *port = netdev_priv(dev);
2455
2456 if (port->state == EHEA_PORT_UP)
2457 return 0;
2458
2459 mutex_lock(&ehea_fw_handles.lock);
2460
2461 ret = ehea_port_res_setup(port, port->num_def_qps,
2462 port->num_add_tx_qps);
2463 if (ret) {
2464 ehea_error("port_res_failed");
2465 goto out;
2466 }
2467
2468 /* Set default QP for this port */
2469 ret = ehea_configure_port(port);
2470 if (ret) {
2471 ehea_error("ehea_configure_port failed. ret:%d", ret);
2472 goto out_clean_pr;
2473 }
2474
2475 ret = ehea_reg_interrupts(dev);
2476 if (ret) {
2477 ehea_error("reg_interrupts failed. ret:%d", ret);
2478 goto out_clean_pr;
2479 }
2480
2481 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2482 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2483 if (ret) {
2484 ehea_error("activate_qp failed");
2485 goto out_free_irqs;
2486 }
2487 }
2488
2489 for (i = 0; i < port->num_def_qps; i++) {
2490 ret = ehea_fill_port_res(&port->port_res[i]);
2491 if (ret) {
2492 ehea_error("out_free_irqs");
2493 goto out_free_irqs;
2494 }
2495 }
2496
2497 mutex_lock(&ehea_bcmc_regs.lock);
2498
2499 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2500 if (ret) {
2501 ret = -EIO;
2502 goto out_free_irqs;
2503 }
2504
2505 port->state = EHEA_PORT_UP;
2506
2507 ret = 0;
2508 goto out;
2509
2510 out_free_irqs:
2511 ehea_free_interrupts(dev);
2512
2513 out_clean_pr:
2514 ehea_clean_all_portres(port);
2515 out:
2516 if (ret)
2517 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2518
2519 ehea_update_bcmc_registrations();
2520 mutex_unlock(&ehea_bcmc_regs.lock);
2521
2522 ehea_update_firmware_handles();
2523 mutex_unlock(&ehea_fw_handles.lock);
2524
2525 return ret;
2526 }
2527
2528 static void port_napi_disable(struct ehea_port *port)
2529 {
2530 int i;
2531
2532 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2533 napi_disable(&port->port_res[i].napi);
2534 }
2535
2536 static void port_napi_enable(struct ehea_port *port)
2537 {
2538 int i;
2539
2540 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2541 napi_enable(&port->port_res[i].napi);
2542 }
2543
2544 static int ehea_open(struct net_device *dev)
2545 {
2546 int ret;
2547 struct ehea_port *port = netdev_priv(dev);
2548
2549 mutex_lock(&port->port_lock);
2550
2551 if (netif_msg_ifup(port))
2552 ehea_info("enabling port %s", dev->name);
2553
2554 ret = ehea_up(dev);
2555 if (!ret) {
2556 port_napi_enable(port);
2557 netif_start_queue(dev);
2558 }
2559
2560 mutex_unlock(&port->port_lock);
2561
2562 return ret;
2563 }
2564
2565 static int ehea_down(struct net_device *dev)
2566 {
2567 int ret;
2568 struct ehea_port *port = netdev_priv(dev);
2569
2570 if (port->state == EHEA_PORT_DOWN)
2571 return 0;
2572
2573 mutex_lock(&ehea_fw_handles.lock);
2574
2575 mutex_lock(&ehea_bcmc_regs.lock);
2576 ehea_drop_multicast_list(dev);
2577 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2578
2579 ehea_free_interrupts(dev);
2580
2581 port->state = EHEA_PORT_DOWN;
2582
2583 ehea_update_bcmc_registrations();
2584 mutex_unlock(&ehea_bcmc_regs.lock);
2585
2586 ret = ehea_clean_all_portres(port);
2587 if (ret)
2588 ehea_info("Failed freeing resources for %s. ret=%i",
2589 dev->name, ret);
2590
2591 ehea_update_firmware_handles();
2592 mutex_unlock(&ehea_fw_handles.lock);
2593
2594 return ret;
2595 }
2596
2597 static int ehea_stop(struct net_device *dev)
2598 {
2599 int ret;
2600 struct ehea_port *port = netdev_priv(dev);
2601
2602 if (netif_msg_ifdown(port))
2603 ehea_info("disabling port %s", dev->name);
2604
2605 flush_scheduled_work();
2606 mutex_lock(&port->port_lock);
2607 netif_stop_queue(dev);
2608 port_napi_disable(port);
2609 ret = ehea_down(dev);
2610 mutex_unlock(&port->port_lock);
2611 return ret;
2612 }
2613
2614 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2615 {
2616 struct ehea_qp qp = *orig_qp;
2617 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2618 struct ehea_swqe *swqe;
2619 int wqe_index;
2620 int i;
2621
2622 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2623 swqe = ehea_get_swqe(&qp, &wqe_index);
2624 swqe->tx_control |= EHEA_SWQE_PURGE;
2625 }
2626 }
2627
2628 static void ehea_flush_sq(struct ehea_port *port)
2629 {
2630 int i;
2631
2632 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2633 struct ehea_port_res *pr = &port->port_res[i];
2634 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2635 int k = 0;
2636 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2637 msleep(5);
2638 if (++k == 20)
2639 break;
2640 }
2641 }
2642 }
2643
2644 int ehea_stop_qps(struct net_device *dev)
2645 {
2646 struct ehea_port *port = netdev_priv(dev);
2647 struct ehea_adapter *adapter = port->adapter;
2648 struct hcp_modify_qp_cb0 *cb0;
2649 int ret = -EIO;
2650 int dret;
2651 int i;
2652 u64 hret;
2653 u64 dummy64 = 0;
2654 u16 dummy16 = 0;
2655
2656 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2657 if (!cb0) {
2658 ret = -ENOMEM;
2659 goto out;
2660 }
2661
2662 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2663 struct ehea_port_res *pr = &port->port_res[i];
2664 struct ehea_qp *qp = pr->qp;
2665
2666 /* Purge send queue */
2667 ehea_purge_sq(qp);
2668
2669 /* Disable queue pair */
2670 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2671 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2672 cb0);
2673 if (hret != H_SUCCESS) {
2674 ehea_error("query_ehea_qp failed (1)");
2675 goto out;
2676 }
2677
2678 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2679 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2680
2681 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2682 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2683 1), cb0, &dummy64,
2684 &dummy64, &dummy16, &dummy16);
2685 if (hret != H_SUCCESS) {
2686 ehea_error("modify_ehea_qp failed (1)");
2687 goto out;
2688 }
2689
2690 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2691 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2692 cb0);
2693 if (hret != H_SUCCESS) {
2694 ehea_error("query_ehea_qp failed (2)");
2695 goto out;
2696 }
2697
2698 /* deregister shared memory regions */
2699 dret = ehea_rem_smrs(pr);
2700 if (dret) {
2701 ehea_error("unreg shared memory region failed");
2702 goto out;
2703 }
2704 }
2705
2706 ret = 0;
2707 out:
2708 kfree(cb0);
2709
2710 return ret;
2711 }
2712
2713 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2714 {
2715 struct ehea_qp qp = *orig_qp;
2716 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2717 struct ehea_rwqe *rwqe;
2718 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2719 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2720 struct sk_buff *skb;
2721 u32 lkey = pr->recv_mr.lkey;
2722
2723
2724 int i;
2725 int index;
2726
2727 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2728 rwqe = ehea_get_next_rwqe(&qp, 2);
2729 rwqe->sg_list[0].l_key = lkey;
2730 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2731 skb = skba_rq2[index];
2732 if (skb)
2733 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2734 }
2735
2736 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2737 rwqe = ehea_get_next_rwqe(&qp, 3);
2738 rwqe->sg_list[0].l_key = lkey;
2739 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2740 skb = skba_rq3[index];
2741 if (skb)
2742 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2743 }
2744 }
2745
2746 int ehea_restart_qps(struct net_device *dev)
2747 {
2748 struct ehea_port *port = netdev_priv(dev);
2749 struct ehea_adapter *adapter = port->adapter;
2750 int ret = 0;
2751 int i;
2752
2753 struct hcp_modify_qp_cb0 *cb0;
2754 u64 hret;
2755 u64 dummy64 = 0;
2756 u16 dummy16 = 0;
2757
2758 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2759 if (!cb0) {
2760 ret = -ENOMEM;
2761 goto out;
2762 }
2763
2764 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2765 struct ehea_port_res *pr = &port->port_res[i];
2766 struct ehea_qp *qp = pr->qp;
2767
2768 ret = ehea_gen_smrs(pr);
2769 if (ret) {
2770 ehea_error("creation of shared memory regions failed");
2771 goto out;
2772 }
2773
2774 ehea_update_rqs(qp, pr);
2775
2776 /* Enable queue pair */
2777 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2778 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2779 cb0);
2780 if (hret != H_SUCCESS) {
2781 ehea_error("query_ehea_qp failed (1)");
2782 goto out;
2783 }
2784
2785 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2786 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2787
2788 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2789 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2790 1), cb0, &dummy64,
2791 &dummy64, &dummy16, &dummy16);
2792 if (hret != H_SUCCESS) {
2793 ehea_error("modify_ehea_qp failed (1)");
2794 goto out;
2795 }
2796
2797 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2798 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2799 cb0);
2800 if (hret != H_SUCCESS) {
2801 ehea_error("query_ehea_qp failed (2)");
2802 goto out;
2803 }
2804
2805 /* refill entire queue */
2806 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2807 ehea_refill_rq2(pr, 0);
2808 ehea_refill_rq3(pr, 0);
2809 }
2810 out:
2811 kfree(cb0);
2812
2813 return ret;
2814 }
2815
2816 static void ehea_reset_port(struct work_struct *work)
2817 {
2818 int ret;
2819 struct ehea_port *port =
2820 container_of(work, struct ehea_port, reset_task);
2821 struct net_device *dev = port->netdev;
2822
2823 port->resets++;
2824 mutex_lock(&port->port_lock);
2825 netif_stop_queue(dev);
2826
2827 port_napi_disable(port);
2828
2829 ehea_down(dev);
2830
2831 ret = ehea_up(dev);
2832 if (ret)
2833 goto out;
2834
2835 ehea_set_multicast_list(dev);
2836
2837 if (netif_msg_timer(port))
2838 ehea_info("Device %s resetted successfully", dev->name);
2839
2840 port_napi_enable(port);
2841
2842 netif_wake_queue(dev);
2843 out:
2844 mutex_unlock(&port->port_lock);
2845 return;
2846 }
2847
2848 static void ehea_rereg_mrs(struct work_struct *work)
2849 {
2850 int ret, i;
2851 struct ehea_adapter *adapter;
2852
2853 mutex_lock(&dlpar_mem_lock);
2854 ehea_info("LPAR memory enlarged - re-initializing driver");
2855
2856 list_for_each_entry(adapter, &adapter_list, list)
2857 if (adapter->active_ports) {
2858 /* Shutdown all ports */
2859 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2860 struct ehea_port *port = adapter->port[i];
2861 struct net_device *dev;
2862
2863 if (!port)
2864 continue;
2865
2866 dev = port->netdev;
2867
2868 if (dev->flags & IFF_UP) {
2869 mutex_lock(&port->port_lock);
2870 netif_stop_queue(dev);
2871 ehea_flush_sq(port);
2872 ret = ehea_stop_qps(dev);
2873 if (ret) {
2874 mutex_unlock(&port->port_lock);
2875 goto out;
2876 }
2877 port_napi_disable(port);
2878 mutex_unlock(&port->port_lock);
2879 }
2880 }
2881
2882 /* Unregister old memory region */
2883 ret = ehea_rem_mr(&adapter->mr);
2884 if (ret) {
2885 ehea_error("unregister MR failed - driver"
2886 " inoperable!");
2887 goto out;
2888 }
2889 }
2890
2891 ehea_destroy_busmap();
2892 ret = ehea_create_busmap();
2893 if (ret) {
2894 ehea_error("creating ehea busmap failed");
2895 goto out;
2896 }
2897
2898 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2899
2900 list_for_each_entry(adapter, &adapter_list, list)
2901 if (adapter->active_ports) {
2902 /* Register new memory region */
2903 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2904 if (ret) {
2905 ehea_error("register MR failed - driver"
2906 " inoperable!");
2907 goto out;
2908 }
2909
2910 /* Restart all ports */
2911 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2912 struct ehea_port *port = adapter->port[i];
2913
2914 if (port) {
2915 struct net_device *dev = port->netdev;
2916
2917 if (dev->flags & IFF_UP) {
2918 mutex_lock(&port->port_lock);
2919 port_napi_enable(port);
2920 ret = ehea_restart_qps(dev);
2921 if (!ret)
2922 netif_wake_queue(dev);
2923 mutex_unlock(&port->port_lock);
2924 }
2925 }
2926 }
2927 }
2928 mutex_unlock(&dlpar_mem_lock);
2929 ehea_info("re-initializing driver complete");
2930 out:
2931 return;
2932 }
2933
2934 static void ehea_tx_watchdog(struct net_device *dev)
2935 {
2936 struct ehea_port *port = netdev_priv(dev);
2937
2938 if (netif_carrier_ok(dev) &&
2939 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2940 schedule_work(&port->reset_task);
2941 }
2942
2943 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2944 {
2945 struct hcp_query_ehea *cb;
2946 u64 hret;
2947 int ret;
2948
2949 cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2950 if (!cb) {
2951 ret = -ENOMEM;
2952 goto out;
2953 }
2954
2955 hret = ehea_h_query_ehea(adapter->handle, cb);
2956
2957 if (hret != H_SUCCESS) {
2958 ret = -EIO;
2959 goto out_herr;
2960 }
2961
2962 adapter->max_mc_mac = cb->max_mc_mac - 1;
2963 ret = 0;
2964
2965 out_herr:
2966 kfree(cb);
2967 out:
2968 return ret;
2969 }
2970
2971 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2972 {
2973 struct hcp_ehea_port_cb4 *cb4;
2974 u64 hret;
2975 int ret = 0;
2976
2977 *jumbo = 0;
2978
2979 /* (Try to) enable *jumbo frames */
2980 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2981 if (!cb4) {
2982 ehea_error("no mem for cb4");
2983 ret = -ENOMEM;
2984 goto out;
2985 } else {
2986 hret = ehea_h_query_ehea_port(port->adapter->handle,
2987 port->logical_port_id,
2988 H_PORT_CB4,
2989 H_PORT_CB4_JUMBO, cb4);
2990 if (hret == H_SUCCESS) {
2991 if (cb4->jumbo_frame)
2992 *jumbo = 1;
2993 else {
2994 cb4->jumbo_frame = 1;
2995 hret = ehea_h_modify_ehea_port(port->adapter->
2996 handle,
2997 port->
2998 logical_port_id,
2999 H_PORT_CB4,
3000 H_PORT_CB4_JUMBO,
3001 cb4);
3002 if (hret == H_SUCCESS)
3003 *jumbo = 1;
3004 }
3005 } else
3006 ret = -EINVAL;
3007
3008 kfree(cb4);
3009 }
3010 out:
3011 return ret;
3012 }
3013
3014 static ssize_t ehea_show_port_id(struct device *dev,
3015 struct device_attribute *attr, char *buf)
3016 {
3017 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3018 return sprintf(buf, "%d", port->logical_port_id);
3019 }
3020
3021 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3022 NULL);
3023
3024 static void __devinit logical_port_release(struct device *dev)
3025 {
3026 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3027 of_node_put(port->ofdev.node);
3028 }
3029
3030 static struct device *ehea_register_port(struct ehea_port *port,
3031 struct device_node *dn)
3032 {
3033 int ret;
3034
3035 port->ofdev.node = of_node_get(dn);
3036 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3037 port->ofdev.dev.bus = &ibmebus_bus_type;
3038
3039 sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
3040 port->ofdev.dev.release = logical_port_release;
3041
3042 ret = of_device_register(&port->ofdev);
3043 if (ret) {
3044 ehea_error("failed to register device. ret=%d", ret);
3045 goto out;
3046 }
3047
3048 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3049 if (ret) {
3050 ehea_error("failed to register attributes, ret=%d", ret);
3051 goto out_unreg_of_dev;
3052 }
3053
3054 return &port->ofdev.dev;
3055
3056 out_unreg_of_dev:
3057 of_device_unregister(&port->ofdev);
3058 out:
3059 return NULL;
3060 }
3061
3062 static void ehea_unregister_port(struct ehea_port *port)
3063 {
3064 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3065 of_device_unregister(&port->ofdev);
3066 }
3067
3068 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3069 u32 logical_port_id,
3070 struct device_node *dn)
3071 {
3072 int ret;
3073 struct net_device *dev;
3074 struct ehea_port *port;
3075 struct device *port_dev;
3076 int jumbo;
3077
3078 /* allocate memory for the port structures */
3079 dev = alloc_etherdev(sizeof(struct ehea_port));
3080
3081 if (!dev) {
3082 ehea_error("no mem for net_device");
3083 ret = -ENOMEM;
3084 goto out_err;
3085 }
3086
3087 port = netdev_priv(dev);
3088
3089 mutex_init(&port->port_lock);
3090 port->state = EHEA_PORT_DOWN;
3091 port->sig_comp_iv = sq_entries / 10;
3092
3093 port->adapter = adapter;
3094 port->netdev = dev;
3095 port->logical_port_id = logical_port_id;
3096
3097 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3098
3099 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3100 if (!port->mc_list) {
3101 ret = -ENOMEM;
3102 goto out_free_ethdev;
3103 }
3104
3105 INIT_LIST_HEAD(&port->mc_list->list);
3106
3107 ret = ehea_sense_port_attr(port);
3108 if (ret)
3109 goto out_free_mc_list;
3110
3111 port_dev = ehea_register_port(port, dn);
3112 if (!port_dev)
3113 goto out_free_mc_list;
3114
3115 SET_NETDEV_DEV(dev, port_dev);
3116
3117 /* initialize net_device structure */
3118 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3119
3120 dev->open = ehea_open;
3121 #ifdef CONFIG_NET_POLL_CONTROLLER
3122 dev->poll_controller = ehea_netpoll;
3123 #endif
3124 dev->stop = ehea_stop;
3125 dev->hard_start_xmit = ehea_start_xmit;
3126 dev->get_stats = ehea_get_stats;
3127 dev->set_multicast_list = ehea_set_multicast_list;
3128 dev->set_mac_address = ehea_set_mac_addr;
3129 dev->change_mtu = ehea_change_mtu;
3130 dev->vlan_rx_register = ehea_vlan_rx_register;
3131 dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
3132 dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
3133 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3134 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3135 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3136 | NETIF_F_LLTX;
3137 dev->tx_timeout = &ehea_tx_watchdog;
3138 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3139
3140 INIT_WORK(&port->reset_task, ehea_reset_port);
3141 ehea_set_ethtool_ops(dev);
3142
3143 ret = register_netdev(dev);
3144 if (ret) {
3145 ehea_error("register_netdev failed. ret=%d", ret);
3146 goto out_unreg_port;
3147 }
3148
3149 port->lro_max_aggr = lro_max_aggr;
3150
3151 ret = ehea_get_jumboframe_status(port, &jumbo);
3152 if (ret)
3153 ehea_error("failed determining jumbo frame status for %s",
3154 port->netdev->name);
3155
3156 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3157 jumbo == 1 ? "en" : "dis");
3158
3159 adapter->active_ports++;
3160
3161 return port;
3162
3163 out_unreg_port:
3164 ehea_unregister_port(port);
3165
3166 out_free_mc_list:
3167 kfree(port->mc_list);
3168
3169 out_free_ethdev:
3170 free_netdev(dev);
3171
3172 out_err:
3173 ehea_error("setting up logical port with id=%d failed, ret=%d",
3174 logical_port_id, ret);
3175 return NULL;
3176 }
3177
3178 static void ehea_shutdown_single_port(struct ehea_port *port)
3179 {
3180 unregister_netdev(port->netdev);
3181 ehea_unregister_port(port);
3182 kfree(port->mc_list);
3183 free_netdev(port->netdev);
3184 port->adapter->active_ports--;
3185 }
3186
3187 static int ehea_setup_ports(struct ehea_adapter *adapter)
3188 {
3189 struct device_node *lhea_dn;
3190 struct device_node *eth_dn = NULL;
3191
3192 const u32 *dn_log_port_id;
3193 int i = 0;
3194
3195 lhea_dn = adapter->ofdev->node;
3196 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3197
3198 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3199 NULL);
3200 if (!dn_log_port_id) {
3201 ehea_error("bad device node: eth_dn name=%s",
3202 eth_dn->full_name);
3203 continue;
3204 }
3205
3206 if (ehea_add_adapter_mr(adapter)) {
3207 ehea_error("creating MR failed");
3208 of_node_put(eth_dn);
3209 return -EIO;
3210 }
3211
3212 adapter->port[i] = ehea_setup_single_port(adapter,
3213 *dn_log_port_id,
3214 eth_dn);
3215 if (adapter->port[i])
3216 ehea_info("%s -> logical port id #%d",
3217 adapter->port[i]->netdev->name,
3218 *dn_log_port_id);
3219 else
3220 ehea_remove_adapter_mr(adapter);
3221
3222 i++;
3223 };
3224 return 0;
3225 }
3226
3227 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3228 u32 logical_port_id)
3229 {
3230 struct device_node *lhea_dn;
3231 struct device_node *eth_dn = NULL;
3232 const u32 *dn_log_port_id;
3233
3234 lhea_dn = adapter->ofdev->node;
3235 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3236
3237 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3238 NULL);
3239 if (dn_log_port_id)
3240 if (*dn_log_port_id == logical_port_id)
3241 return eth_dn;
3242 };
3243
3244 return NULL;
3245 }
3246
3247 static ssize_t ehea_probe_port(struct device *dev,
3248 struct device_attribute *attr,
3249 const char *buf, size_t count)
3250 {
3251 struct ehea_adapter *adapter = dev->driver_data;
3252 struct ehea_port *port;
3253 struct device_node *eth_dn = NULL;
3254 int i;
3255
3256 u32 logical_port_id;
3257
3258 sscanf(buf, "%d", &logical_port_id);
3259
3260 port = ehea_get_port(adapter, logical_port_id);
3261
3262 if (port) {
3263 ehea_info("adding port with logical port id=%d failed. port "
3264 "already configured as %s.", logical_port_id,
3265 port->netdev->name);
3266 return -EINVAL;
3267 }
3268
3269 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3270
3271 if (!eth_dn) {
3272 ehea_info("no logical port with id %d found", logical_port_id);
3273 return -EINVAL;
3274 }
3275
3276 if (ehea_add_adapter_mr(adapter)) {
3277 ehea_error("creating MR failed");
3278 return -EIO;
3279 }
3280
3281 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3282
3283 of_node_put(eth_dn);
3284
3285 if (port) {
3286 for (i = 0; i < EHEA_MAX_PORTS; i++)
3287 if (!adapter->port[i]) {
3288 adapter->port[i] = port;
3289 break;
3290 }
3291
3292 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3293 logical_port_id);
3294 } else {
3295 ehea_remove_adapter_mr(adapter);
3296 return -EIO;
3297 }
3298
3299 return (ssize_t) count;
3300 }
3301
3302 static ssize_t ehea_remove_port(struct device *dev,
3303 struct device_attribute *attr,
3304 const char *buf, size_t count)
3305 {
3306 struct ehea_adapter *adapter = dev->driver_data;
3307 struct ehea_port *port;
3308 int i;
3309 u32 logical_port_id;
3310
3311 sscanf(buf, "%d", &logical_port_id);
3312
3313 port = ehea_get_port(adapter, logical_port_id);
3314
3315 if (port) {
3316 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3317 logical_port_id);
3318
3319 ehea_shutdown_single_port(port);
3320
3321 for (i = 0; i < EHEA_MAX_PORTS; i++)
3322 if (adapter->port[i] == port) {
3323 adapter->port[i] = NULL;
3324 break;
3325 }
3326 } else {
3327 ehea_error("removing port with logical port id=%d failed. port "
3328 "not configured.", logical_port_id);
3329 return -EINVAL;
3330 }
3331
3332 ehea_remove_adapter_mr(adapter);
3333
3334 return (ssize_t) count;
3335 }
3336
3337 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3338 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3339
3340 int ehea_create_device_sysfs(struct of_device *dev)
3341 {
3342 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3343 if (ret)
3344 goto out;
3345
3346 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3347 out:
3348 return ret;
3349 }
3350
3351 void ehea_remove_device_sysfs(struct of_device *dev)
3352 {
3353 device_remove_file(&dev->dev, &dev_attr_probe_port);
3354 device_remove_file(&dev->dev, &dev_attr_remove_port);
3355 }
3356
3357 static int __devinit ehea_probe_adapter(struct of_device *dev,
3358 const struct of_device_id *id)
3359 {
3360 struct ehea_adapter *adapter;
3361 const u64 *adapter_handle;
3362 int ret;
3363
3364 if (!dev || !dev->node) {
3365 ehea_error("Invalid ibmebus device probed");
3366 return -EINVAL;
3367 }
3368 mutex_lock(&ehea_fw_handles.lock);
3369
3370 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3371 if (!adapter) {
3372 ret = -ENOMEM;
3373 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3374 goto out;
3375 }
3376
3377 list_add(&adapter->list, &adapter_list);
3378
3379 adapter->ofdev = dev;
3380
3381 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3382 NULL);
3383 if (adapter_handle)
3384 adapter->handle = *adapter_handle;
3385
3386 if (!adapter->handle) {
3387 dev_err(&dev->dev, "failed getting handle for adapter"
3388 " '%s'\n", dev->node->full_name);
3389 ret = -ENODEV;
3390 goto out_free_ad;
3391 }
3392
3393 adapter->pd = EHEA_PD_ID;
3394
3395 dev->dev.driver_data = adapter;
3396
3397
3398 /* initialize adapter and ports */
3399 /* get adapter properties */
3400 ret = ehea_sense_adapter_attr(adapter);
3401 if (ret) {
3402 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3403 goto out_free_ad;
3404 }
3405
3406 adapter->neq = ehea_create_eq(adapter,
3407 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3408 if (!adapter->neq) {
3409 ret = -EIO;
3410 dev_err(&dev->dev, "NEQ creation failed\n");
3411 goto out_free_ad;
3412 }
3413
3414 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3415 (unsigned long)adapter);
3416
3417 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3418 ehea_interrupt_neq, IRQF_DISABLED,
3419 "ehea_neq", adapter);
3420 if (ret) {
3421 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3422 goto out_kill_eq;
3423 }
3424
3425 ret = ehea_create_device_sysfs(dev);
3426 if (ret)
3427 goto out_free_irq;
3428
3429 ret = ehea_setup_ports(adapter);
3430 if (ret) {
3431 dev_err(&dev->dev, "setup_ports failed\n");
3432 goto out_rem_dev_sysfs;
3433 }
3434
3435 ret = 0;
3436 goto out;
3437
3438 out_rem_dev_sysfs:
3439 ehea_remove_device_sysfs(dev);
3440
3441 out_free_irq:
3442 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3443
3444 out_kill_eq:
3445 ehea_destroy_eq(adapter->neq);
3446
3447 out_free_ad:
3448 kfree(adapter);
3449
3450 out:
3451 ehea_update_firmware_handles();
3452 mutex_unlock(&ehea_fw_handles.lock);
3453 return ret;
3454 }
3455
3456 static int __devexit ehea_remove(struct of_device *dev)
3457 {
3458 struct ehea_adapter *adapter = dev->dev.driver_data;
3459 int i;
3460
3461 for (i = 0; i < EHEA_MAX_PORTS; i++)
3462 if (adapter->port[i]) {
3463 ehea_shutdown_single_port(adapter->port[i]);
3464 adapter->port[i] = NULL;
3465 }
3466
3467 ehea_remove_device_sysfs(dev);
3468
3469 flush_scheduled_work();
3470
3471 mutex_lock(&ehea_fw_handles.lock);
3472
3473 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3474 tasklet_kill(&adapter->neq_tasklet);
3475
3476 ehea_destroy_eq(adapter->neq);
3477 ehea_remove_adapter_mr(adapter);
3478 list_del(&adapter->list);
3479 kfree(adapter);
3480
3481 ehea_update_firmware_handles();
3482 mutex_unlock(&ehea_fw_handles.lock);
3483
3484 return 0;
3485 }
3486
3487 void ehea_crash_handler(void)
3488 {
3489 int i;
3490
3491 if (ehea_fw_handles.arr)
3492 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3493 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3494 ehea_fw_handles.arr[i].fwh,
3495 FORCE_FREE);
3496
3497 if (ehea_bcmc_regs.arr)
3498 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3499 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3500 ehea_bcmc_regs.arr[i].port_id,
3501 ehea_bcmc_regs.arr[i].reg_type,
3502 ehea_bcmc_regs.arr[i].macaddr,
3503 0, H_DEREG_BCMC);
3504 }
3505
3506 static int ehea_reboot_notifier(struct notifier_block *nb,
3507 unsigned long action, void *unused)
3508 {
3509 if (action == SYS_RESTART) {
3510 ehea_info("Reboot: freeing all eHEA resources");
3511 ibmebus_unregister_driver(&ehea_driver);
3512 }
3513 return NOTIFY_DONE;
3514 }
3515
3516 static struct notifier_block ehea_reboot_nb = {
3517 .notifier_call = ehea_reboot_notifier,
3518 };
3519
3520 static int check_module_parm(void)
3521 {
3522 int ret = 0;
3523
3524 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3525 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3526 ehea_info("Bad parameter: rq1_entries");
3527 ret = -EINVAL;
3528 }
3529 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3530 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3531 ehea_info("Bad parameter: rq2_entries");
3532 ret = -EINVAL;
3533 }
3534 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3535 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3536 ehea_info("Bad parameter: rq3_entries");
3537 ret = -EINVAL;
3538 }
3539 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3540 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3541 ehea_info("Bad parameter: sq_entries");
3542 ret = -EINVAL;
3543 }
3544
3545 return ret;
3546 }
3547
3548 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3549 char *buf)
3550 {
3551 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3552 }
3553
3554 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3555 ehea_show_capabilities, NULL);
3556
3557 int __init ehea_module_init(void)
3558 {
3559 int ret;
3560
3561 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3562 DRV_VERSION);
3563
3564
3565 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3566 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3567 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3568
3569 mutex_init(&ehea_fw_handles.lock);
3570 mutex_init(&ehea_bcmc_regs.lock);
3571
3572 ret = check_module_parm();
3573 if (ret)
3574 goto out;
3575
3576 ret = ehea_create_busmap();
3577 if (ret)
3578 goto out;
3579
3580 ret = register_reboot_notifier(&ehea_reboot_nb);
3581 if (ret)
3582 ehea_info("failed registering reboot notifier");
3583
3584 ret = crash_shutdown_register(&ehea_crash_handler);
3585 if (ret)
3586 ehea_info("failed registering crash handler");
3587
3588 ret = ibmebus_register_driver(&ehea_driver);
3589 if (ret) {
3590 ehea_error("failed registering eHEA device driver on ebus");
3591 goto out2;
3592 }
3593
3594 ret = driver_create_file(&ehea_driver.driver,
3595 &driver_attr_capabilities);
3596 if (ret) {
3597 ehea_error("failed to register capabilities attribute, ret=%d",
3598 ret);
3599 goto out3;
3600 }
3601
3602 return ret;
3603
3604 out3:
3605 ibmebus_unregister_driver(&ehea_driver);
3606 out2:
3607 unregister_reboot_notifier(&ehea_reboot_nb);
3608 crash_shutdown_unregister(&ehea_crash_handler);
3609 out:
3610 return ret;
3611 }
3612
3613 static void __exit ehea_module_exit(void)
3614 {
3615 int ret;
3616
3617 flush_scheduled_work();
3618 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3619 ibmebus_unregister_driver(&ehea_driver);
3620 unregister_reboot_notifier(&ehea_reboot_nb);
3621 ret = crash_shutdown_unregister(&ehea_crash_handler);
3622 if (ret)
3623 ehea_info("failed unregistering crash handler");
3624 kfree(ehea_fw_handles.arr);
3625 kfree(ehea_bcmc_regs.arr);
3626 ehea_destroy_busmap();
3627 }
3628
3629 module_init(ehea_module_init);
3630 module_exit(ehea_module_exit);
A Kernel for the Dreambox dm7025.