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OMAP3 SDRC: set FIXEDDELAY when disabling SDRC DLL
[linux-ginger.git] / drivers / net / ehea / ehea_main.c
blobb22dab9153f67788f8292ecfe877726cb7a0505d
1 /*
2 * linux/drivers/net/ehea/ehea_main.c
3 *
4 * eHEA ethernet device driver for IBM eServer System p
5 *
6 * (C) Copyright IBM Corp. 2006
7 *
8 * Authors:
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
12 *
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #include <linux/in.h>
30 #include <linux/ip.h>
31 #include <linux/tcp.h>
32 #include <linux/udp.h>
33 #include <linux/if.h>
34 #include <linux/list.h>
35 #include <linux/if_ether.h>
36 #include <linux/notifier.h>
37 #include <linux/reboot.h>
38 #include <linux/memory.h>
39 #include <asm/kexec.h>
40 #include <linux/mutex.h>
41
42 #include <net/ip.h>
43
44 #include "ehea.h"
45 #include "ehea_qmr.h"
46 #include "ehea_phyp.h"
47
48
49 MODULE_LICENSE("GPL");
50 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
51 MODULE_DESCRIPTION("IBM eServer HEA Driver");
52 MODULE_VERSION(DRV_VERSION);
53
54
55 static int msg_level = -1;
56 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
57 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
58 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
59 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
60 static int use_mcs;
61 static int use_lro;
62 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
63 static int num_tx_qps = EHEA_NUM_TX_QP;
64 static int prop_carrier_state;
65
66 module_param(msg_level, int, 0);
67 module_param(rq1_entries, int, 0);
68 module_param(rq2_entries, int, 0);
69 module_param(rq3_entries, int, 0);
70 module_param(sq_entries, int, 0);
71 module_param(prop_carrier_state, int, 0);
72 module_param(use_mcs, int, 0);
73 module_param(use_lro, int, 0);
74 module_param(lro_max_aggr, int, 0);
75 module_param(num_tx_qps, int, 0);
76
77 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
78 MODULE_PARM_DESC(msg_level, "msg_level");
79 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
80 "port to stack. 1:yes, 0:no. Default = 0 ");
81 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
82 "[2^x - 1], x = [6..14]. Default = "
83 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
84 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
85 "[2^x - 1], x = [6..14]. Default = "
86 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
87 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
88 "[2^x - 1], x = [6..14]. Default = "
89 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
90 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
91 "[2^x - 1], x = [6..14]. Default = "
92 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
93 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
94
95 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
96 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
97 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
98 "Default = 0");
99
100 static int port_name_cnt;
101 static LIST_HEAD(adapter_list);
102 static unsigned long ehea_driver_flags;
103 struct work_struct ehea_rereg_mr_task;
104 static DEFINE_MUTEX(dlpar_mem_lock);
105 struct ehea_fw_handle_array ehea_fw_handles;
106 struct ehea_bcmc_reg_array ehea_bcmc_regs;
107
108
109 static int __devinit ehea_probe_adapter(struct of_device *dev,
110 const struct of_device_id *id);
111
112 static int __devexit ehea_remove(struct of_device *dev);
113
114 static struct of_device_id ehea_device_table[] = {
115 {
116 .name = "lhea",
117 .compatible = "IBM,lhea",
118 },
119 {},
120 };
121 MODULE_DEVICE_TABLE(of, ehea_device_table);
122
123 static struct of_platform_driver ehea_driver = {
124 .name = "ehea",
125 .match_table = ehea_device_table,
126 .probe = ehea_probe_adapter,
127 .remove = ehea_remove,
128 };
129
130 void ehea_dump(void *adr, int len, char *msg)
131 {
132 int x;
133 unsigned char *deb = adr;
134 for (x = 0; x < len; x += 16) {
135 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
136 deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
137 deb += 16;
138 }
139 }
140
141 void ehea_schedule_port_reset(struct ehea_port *port)
142 {
143 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
144 schedule_work(&port->reset_task);
145 }
146
147 static void ehea_update_firmware_handles(void)
148 {
149 struct ehea_fw_handle_entry *arr = NULL;
150 struct ehea_adapter *adapter;
151 int num_adapters = 0;
152 int num_ports = 0;
153 int num_portres = 0;
154 int i = 0;
155 int num_fw_handles, k, l;
156
157 /* Determine number of handles */
158 mutex_lock(&ehea_fw_handles.lock);
159
160 list_for_each_entry(adapter, &adapter_list, list) {
161 num_adapters++;
162
163 for (k = 0; k < EHEA_MAX_PORTS; k++) {
164 struct ehea_port *port = adapter->port[k];
165
166 if (!port || (port->state != EHEA_PORT_UP))
167 continue;
168
169 num_ports++;
170 num_portres += port->num_def_qps + port->num_add_tx_qps;
171 }
172 }
173
174 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
175 num_ports * EHEA_NUM_PORT_FW_HANDLES +
176 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
177
178 if (num_fw_handles) {
179 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
180 if (!arr)
181 goto out; /* Keep the existing array */
182 } else
183 goto out_update;
184
185 list_for_each_entry(adapter, &adapter_list, list) {
186 if (num_adapters == 0)
187 break;
188
189 for (k = 0; k < EHEA_MAX_PORTS; k++) {
190 struct ehea_port *port = adapter->port[k];
191
192 if (!port || (port->state != EHEA_PORT_UP)
193 || (num_ports == 0))
194 continue;
195
196 for (l = 0;
197 l < port->num_def_qps + port->num_add_tx_qps;
198 l++) {
199 struct ehea_port_res *pr = &port->port_res[l];
200
201 arr[i].adh = adapter->handle;
202 arr[i++].fwh = pr->qp->fw_handle;
203 arr[i].adh = adapter->handle;
204 arr[i++].fwh = pr->send_cq->fw_handle;
205 arr[i].adh = adapter->handle;
206 arr[i++].fwh = pr->recv_cq->fw_handle;
207 arr[i].adh = adapter->handle;
208 arr[i++].fwh = pr->eq->fw_handle;
209 arr[i].adh = adapter->handle;
210 arr[i++].fwh = pr->send_mr.handle;
211 arr[i].adh = adapter->handle;
212 arr[i++].fwh = pr->recv_mr.handle;
213 }
214 arr[i].adh = adapter->handle;
215 arr[i++].fwh = port->qp_eq->fw_handle;
216 num_ports--;
217 }
218
219 arr[i].adh = adapter->handle;
220 arr[i++].fwh = adapter->neq->fw_handle;
221
222 if (adapter->mr.handle) {
223 arr[i].adh = adapter->handle;
224 arr[i++].fwh = adapter->mr.handle;
225 }
226 num_adapters--;
227 }
228
229 out_update:
230 kfree(ehea_fw_handles.arr);
231 ehea_fw_handles.arr = arr;
232 ehea_fw_handles.num_entries = i;
233 out:
234 mutex_unlock(&ehea_fw_handles.lock);
235 }
236
237 static void ehea_update_bcmc_registrations(void)
238 {
239 unsigned long flags;
240 struct ehea_bcmc_reg_entry *arr = NULL;
241 struct ehea_adapter *adapter;
242 struct ehea_mc_list *mc_entry;
243 int num_registrations = 0;
244 int i = 0;
245 int k;
246
247 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
248
249 /* Determine number of registrations */
250 list_for_each_entry(adapter, &adapter_list, list)
251 for (k = 0; k < EHEA_MAX_PORTS; k++) {
252 struct ehea_port *port = adapter->port[k];
253
254 if (!port || (port->state != EHEA_PORT_UP))
255 continue;
256
257 num_registrations += 2; /* Broadcast registrations */
258
259 list_for_each_entry(mc_entry, &port->mc_list->list,list)
260 num_registrations += 2;
261 }
262
263 if (num_registrations) {
264 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
265 if (!arr)
266 goto out; /* Keep the existing array */
267 } else
268 goto out_update;
269
270 list_for_each_entry(adapter, &adapter_list, list) {
271 for (k = 0; k < EHEA_MAX_PORTS; k++) {
272 struct ehea_port *port = adapter->port[k];
273
274 if (!port || (port->state != EHEA_PORT_UP))
275 continue;
276
277 if (num_registrations == 0)
278 goto out_update;
279
280 arr[i].adh = adapter->handle;
281 arr[i].port_id = port->logical_port_id;
282 arr[i].reg_type = EHEA_BCMC_BROADCAST |
283 EHEA_BCMC_UNTAGGED;
284 arr[i++].macaddr = port->mac_addr;
285
286 arr[i].adh = adapter->handle;
287 arr[i].port_id = port->logical_port_id;
288 arr[i].reg_type = EHEA_BCMC_BROADCAST |
289 EHEA_BCMC_VLANID_ALL;
290 arr[i++].macaddr = port->mac_addr;
291 num_registrations -= 2;
292
293 list_for_each_entry(mc_entry,
294 &port->mc_list->list, list) {
295 if (num_registrations == 0)
296 goto out_update;
297
298 arr[i].adh = adapter->handle;
299 arr[i].port_id = port->logical_port_id;
300 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
301 EHEA_BCMC_MULTICAST |
302 EHEA_BCMC_UNTAGGED;
303 arr[i++].macaddr = mc_entry->macaddr;
304
305 arr[i].adh = adapter->handle;
306 arr[i].port_id = port->logical_port_id;
307 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
308 EHEA_BCMC_MULTICAST |
309 EHEA_BCMC_VLANID_ALL;
310 arr[i++].macaddr = mc_entry->macaddr;
311 num_registrations -= 2;
312 }
313 }
314 }
315
316 out_update:
317 kfree(ehea_bcmc_regs.arr);
318 ehea_bcmc_regs.arr = arr;
319 ehea_bcmc_regs.num_entries = i;
320 out:
321 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
322 }
323
324 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
325 {
326 struct ehea_port *port = netdev_priv(dev);
327 struct net_device_stats *stats = &port->stats;
328 struct hcp_ehea_port_cb2 *cb2;
329 u64 hret, rx_packets, tx_packets;
330 int i;
331
332 memset(stats, 0, sizeof(*stats));
333
334 cb2 = (void *)get_zeroed_page(GFP_ATOMIC);
335 if (!cb2) {
336 ehea_error("no mem for cb2");
337 goto out;
338 }
339
340 hret = ehea_h_query_ehea_port(port->adapter->handle,
341 port->logical_port_id,
342 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
343 if (hret != H_SUCCESS) {
344 ehea_error("query_ehea_port failed");
345 goto out_herr;
346 }
347
348 if (netif_msg_hw(port))
349 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
350
351 rx_packets = 0;
352 for (i = 0; i < port->num_def_qps; i++)
353 rx_packets += port->port_res[i].rx_packets;
354
355 tx_packets = 0;
356 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
357 tx_packets += port->port_res[i].tx_packets;
358
359 stats->tx_packets = tx_packets;
360 stats->multicast = cb2->rxmcp;
361 stats->rx_errors = cb2->rxuerr;
362 stats->rx_bytes = cb2->rxo;
363 stats->tx_bytes = cb2->txo;
364 stats->rx_packets = rx_packets;
365
366 out_herr:
367 free_page((unsigned long)cb2);
368 out:
369 return stats;
370 }
371
372 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
373 {
374 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
375 struct net_device *dev = pr->port->netdev;
376 int max_index_mask = pr->rq1_skba.len - 1;
377 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
378 int adder = 0;
379 int i;
380
381 pr->rq1_skba.os_skbs = 0;
382
383 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
384 if (nr_of_wqes > 0)
385 pr->rq1_skba.index = index;
386 pr->rq1_skba.os_skbs = fill_wqes;
387 return;
388 }
389
390 for (i = 0; i < fill_wqes; i++) {
391 if (!skb_arr_rq1[index]) {
392 skb_arr_rq1[index] = netdev_alloc_skb(dev,
393 EHEA_L_PKT_SIZE);
394 if (!skb_arr_rq1[index]) {
395 pr->rq1_skba.os_skbs = fill_wqes - i;
396 break;
397 }
398 }
399 index--;
400 index &= max_index_mask;
401 adder++;
402 }
403
404 if (adder == 0)
405 return;
406
407 /* Ring doorbell */
408 ehea_update_rq1a(pr->qp, adder);
409 }
410
411 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
412 {
413 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
414 struct net_device *dev = pr->port->netdev;
415 int i;
416
417 for (i = 0; i < pr->rq1_skba.len; i++) {
418 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
419 if (!skb_arr_rq1[i])
420 break;
421 }
422 /* Ring doorbell */
423 ehea_update_rq1a(pr->qp, nr_rq1a);
424 }
425
426 static int ehea_refill_rq_def(struct ehea_port_res *pr,
427 struct ehea_q_skb_arr *q_skba, int rq_nr,
428 int num_wqes, int wqe_type, int packet_size)
429 {
430 struct net_device *dev = pr->port->netdev;
431 struct ehea_qp *qp = pr->qp;
432 struct sk_buff **skb_arr = q_skba->arr;
433 struct ehea_rwqe *rwqe;
434 int i, index, max_index_mask, fill_wqes;
435 int adder = 0;
436 int ret = 0;
437
438 fill_wqes = q_skba->os_skbs + num_wqes;
439 q_skba->os_skbs = 0;
440
441 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
442 q_skba->os_skbs = fill_wqes;
443 return ret;
444 }
445
446 index = q_skba->index;
447 max_index_mask = q_skba->len - 1;
448 for (i = 0; i < fill_wqes; i++) {
449 u64 tmp_addr;
450 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
451 if (!skb) {
452 q_skba->os_skbs = fill_wqes - i;
453 if (q_skba->os_skbs == q_skba->len - 2) {
454 ehea_info("%s: rq%i ran dry - no mem for skb",
455 pr->port->netdev->name, rq_nr);
456 ret = -ENOMEM;
457 }
458 break;
459 }
460 skb_reserve(skb, NET_IP_ALIGN);
461
462 skb_arr[index] = skb;
463 tmp_addr = ehea_map_vaddr(skb->data);
464 if (tmp_addr == -1) {
465 dev_kfree_skb(skb);
466 q_skba->os_skbs = fill_wqes - i;
467 ret = 0;
468 break;
469 }
470
471 rwqe = ehea_get_next_rwqe(qp, rq_nr);
472 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
473 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
474 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
475 rwqe->sg_list[0].vaddr = tmp_addr;
476 rwqe->sg_list[0].len = packet_size;
477 rwqe->data_segments = 1;
478
479 index++;
480 index &= max_index_mask;
481 adder++;
482 }
483
484 q_skba->index = index;
485 if (adder == 0)
486 goto out;
487
488 /* Ring doorbell */
489 iosync();
490 if (rq_nr == 2)
491 ehea_update_rq2a(pr->qp, adder);
492 else
493 ehea_update_rq3a(pr->qp, adder);
494 out:
495 return ret;
496 }
497
498
499 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
500 {
501 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
502 nr_of_wqes, EHEA_RWQE2_TYPE,
503 EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
504 }
505
506
507 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
508 {
509 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
510 nr_of_wqes, EHEA_RWQE3_TYPE,
511 EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
512 }
513
514 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
515 {
516 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
517 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
518 return 0;
519 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
520 (cqe->header_length == 0))
521 return 0;
522 return -EINVAL;
523 }
524
525 static inline void ehea_fill_skb(struct net_device *dev,
526 struct sk_buff *skb, struct ehea_cqe *cqe)
527 {
528 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
529
530 skb_put(skb, length);
531 skb->ip_summed = CHECKSUM_UNNECESSARY;
532 skb->protocol = eth_type_trans(skb, dev);
533 }
534
535 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
536 int arr_len,
537 struct ehea_cqe *cqe)
538 {
539 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
540 struct sk_buff *skb;
541 void *pref;
542 int x;
543
544 x = skb_index + 1;
545 x &= (arr_len - 1);
546
547 pref = skb_array[x];
548 if (pref) {
549 prefetchw(pref);
550 prefetchw(pref + EHEA_CACHE_LINE);
551
552 pref = (skb_array[x]->data);
553 prefetch(pref);
554 prefetch(pref + EHEA_CACHE_LINE);
555 prefetch(pref + EHEA_CACHE_LINE * 2);
556 prefetch(pref + EHEA_CACHE_LINE * 3);
557 }
558
559 skb = skb_array[skb_index];
560 skb_array[skb_index] = NULL;
561 return skb;
562 }
563
564 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
565 int arr_len, int wqe_index)
566 {
567 struct sk_buff *skb;
568 void *pref;
569 int x;
570
571 x = wqe_index + 1;
572 x &= (arr_len - 1);
573
574 pref = skb_array[x];
575 if (pref) {
576 prefetchw(pref);
577 prefetchw(pref + EHEA_CACHE_LINE);
578
579 pref = (skb_array[x]->data);
580 prefetchw(pref);
581 prefetchw(pref + EHEA_CACHE_LINE);
582 }
583
584 skb = skb_array[wqe_index];
585 skb_array[wqe_index] = NULL;
586 return skb;
587 }
588
589 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
590 struct ehea_cqe *cqe, int *processed_rq2,
591 int *processed_rq3)
592 {
593 struct sk_buff *skb;
594
595 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
596 pr->p_stats.err_tcp_cksum++;
597 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
598 pr->p_stats.err_ip_cksum++;
599 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
600 pr->p_stats.err_frame_crc++;
601
602 if (rq == 2) {
603 *processed_rq2 += 1;
604 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
605 dev_kfree_skb(skb);
606 } else if (rq == 3) {
607 *processed_rq3 += 1;
608 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
609 dev_kfree_skb(skb);
610 }
611
612 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
613 if (netif_msg_rx_err(pr->port)) {
614 ehea_error("Critical receive error for QP %d. "
615 "Resetting port.", pr->qp->init_attr.qp_nr);
616 ehea_dump(cqe, sizeof(*cqe), "CQE");
617 }
618 ehea_schedule_port_reset(pr->port);
619 return 1;
620 }
621
622 return 0;
623 }
624
625 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
626 void **tcph, u64 *hdr_flags, void *priv)
627 {
628 struct ehea_cqe *cqe = priv;
629 unsigned int ip_len;
630 struct iphdr *iph;
631
632 /* non tcp/udp packets */
633 if (!cqe->header_length)
634 return -1;
635
636 /* non tcp packet */
637 skb_reset_network_header(skb);
638 iph = ip_hdr(skb);
639 if (iph->protocol != IPPROTO_TCP)
640 return -1;
641
642 ip_len = ip_hdrlen(skb);
643 skb_set_transport_header(skb, ip_len);
644 *tcph = tcp_hdr(skb);
645
646 /* check if ip header and tcp header are complete */
647 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
648 return -1;
649
650 *hdr_flags = LRO_IPV4 | LRO_TCP;
651 *iphdr = iph;
652
653 return 0;
654 }
655
656 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
657 struct sk_buff *skb)
658 {
659 int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
660 && pr->port->vgrp;
661
662 if (use_lro) {
663 if (vlan_extracted)
664 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
665 pr->port->vgrp,
666 cqe->vlan_tag,
667 cqe);
668 else
669 lro_receive_skb(&pr->lro_mgr, skb, cqe);
670 } else {
671 if (vlan_extracted)
672 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
673 cqe->vlan_tag);
674 else
675 netif_receive_skb(skb);
676 }
677 }
678
679 static int ehea_proc_rwqes(struct net_device *dev,
680 struct ehea_port_res *pr,
681 int budget)
682 {
683 struct ehea_port *port = pr->port;
684 struct ehea_qp *qp = pr->qp;
685 struct ehea_cqe *cqe;
686 struct sk_buff *skb;
687 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
688 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
689 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
690 int skb_arr_rq1_len = pr->rq1_skba.len;
691 int skb_arr_rq2_len = pr->rq2_skba.len;
692 int skb_arr_rq3_len = pr->rq3_skba.len;
693 int processed, processed_rq1, processed_rq2, processed_rq3;
694 int wqe_index, last_wqe_index, rq, port_reset;
695
696 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
697 last_wqe_index = 0;
698
699 cqe = ehea_poll_rq1(qp, &wqe_index);
700 while ((processed < budget) && cqe) {
701 ehea_inc_rq1(qp);
702 processed_rq1++;
703 processed++;
704 if (netif_msg_rx_status(port))
705 ehea_dump(cqe, sizeof(*cqe), "CQE");
706
707 last_wqe_index = wqe_index;
708 rmb();
709 if (!ehea_check_cqe(cqe, &rq)) {
710 if (rq == 1) {
711 /* LL RQ1 */
712 skb = get_skb_by_index_ll(skb_arr_rq1,
713 skb_arr_rq1_len,
714 wqe_index);
715 if (unlikely(!skb)) {
716 if (netif_msg_rx_err(port))
717 ehea_error("LL rq1: skb=NULL");
718
719 skb = netdev_alloc_skb(dev,
720 EHEA_L_PKT_SIZE);
721 if (!skb)
722 break;
723 }
724 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
725 cqe->num_bytes_transfered - 4);
726 ehea_fill_skb(dev, skb, cqe);
727 } else if (rq == 2) {
728 /* RQ2 */
729 skb = get_skb_by_index(skb_arr_rq2,
730 skb_arr_rq2_len, cqe);
731 if (unlikely(!skb)) {
732 if (netif_msg_rx_err(port))
733 ehea_error("rq2: skb=NULL");
734 break;
735 }
736 ehea_fill_skb(dev, skb, cqe);
737 processed_rq2++;
738 } else {
739 /* RQ3 */
740 skb = get_skb_by_index(skb_arr_rq3,
741 skb_arr_rq3_len, cqe);
742 if (unlikely(!skb)) {
743 if (netif_msg_rx_err(port))
744 ehea_error("rq3: skb=NULL");
745 break;
746 }
747 ehea_fill_skb(dev, skb, cqe);
748 processed_rq3++;
749 }
750
751 ehea_proc_skb(pr, cqe, skb);
752 } else {
753 pr->p_stats.poll_receive_errors++;
754 port_reset = ehea_treat_poll_error(pr, rq, cqe,
755 &processed_rq2,
756 &processed_rq3);
757 if (port_reset)
758 break;
759 }
760 cqe = ehea_poll_rq1(qp, &wqe_index);
761 }
762 if (use_lro)
763 lro_flush_all(&pr->lro_mgr);
764
765 pr->rx_packets += processed;
766
767 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
768 ehea_refill_rq2(pr, processed_rq2);
769 ehea_refill_rq3(pr, processed_rq3);
770
771 return processed;
772 }
773
774 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
775 {
776 struct sk_buff *skb;
777 struct ehea_cq *send_cq = pr->send_cq;
778 struct ehea_cqe *cqe;
779 int quota = my_quota;
780 int cqe_counter = 0;
781 int swqe_av = 0;
782 int index;
783 unsigned long flags;
784
785 cqe = ehea_poll_cq(send_cq);
786 while (cqe && (quota > 0)) {
787 ehea_inc_cq(send_cq);
788
789 cqe_counter++;
790 rmb();
791 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
792 ehea_error("Send Completion Error: Resetting port");
793 if (netif_msg_tx_err(pr->port))
794 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
795 ehea_schedule_port_reset(pr->port);
796 break;
797 }
798
799 if (netif_msg_tx_done(pr->port))
800 ehea_dump(cqe, sizeof(*cqe), "CQE");
801
802 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
803 == EHEA_SWQE2_TYPE)) {
804
805 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
806 skb = pr->sq_skba.arr[index];
807 dev_kfree_skb(skb);
808 pr->sq_skba.arr[index] = NULL;
809 }
810
811 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
812 quota--;
813
814 cqe = ehea_poll_cq(send_cq);
815 };
816
817 ehea_update_feca(send_cq, cqe_counter);
818 atomic_add(swqe_av, &pr->swqe_avail);
819
820 spin_lock_irqsave(&pr->netif_queue, flags);
821
822 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
823 >= pr->swqe_refill_th)) {
824 netif_wake_queue(pr->port->netdev);
825 pr->queue_stopped = 0;
826 }
827 spin_unlock_irqrestore(&pr->netif_queue, flags);
828
829 return cqe;
830 }
831
832 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
833 #define EHEA_POLL_MAX_CQES 65535
834
835 static int ehea_poll(struct napi_struct *napi, int budget)
836 {
837 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
838 napi);
839 struct net_device *dev = pr->port->netdev;
840 struct ehea_cqe *cqe;
841 struct ehea_cqe *cqe_skb = NULL;
842 int force_irq, wqe_index;
843 int rx = 0;
844
845 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
846 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
847
848 if (!force_irq)
849 rx += ehea_proc_rwqes(dev, pr, budget - rx);
850
851 while ((rx != budget) || force_irq) {
852 pr->poll_counter = 0;
853 force_irq = 0;
854 napi_complete(napi);
855 ehea_reset_cq_ep(pr->recv_cq);
856 ehea_reset_cq_ep(pr->send_cq);
857 ehea_reset_cq_n1(pr->recv_cq);
858 ehea_reset_cq_n1(pr->send_cq);
859 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
860 cqe_skb = ehea_poll_cq(pr->send_cq);
861
862 if (!cqe && !cqe_skb)
863 return rx;
864
865 if (!napi_reschedule(napi))
866 return rx;
867
868 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
869 rx += ehea_proc_rwqes(dev, pr, budget - rx);
870 }
871
872 pr->poll_counter++;
873 return rx;
874 }
875
876 #ifdef CONFIG_NET_POLL_CONTROLLER
877 static void ehea_netpoll(struct net_device *dev)
878 {
879 struct ehea_port *port = netdev_priv(dev);
880 int i;
881
882 for (i = 0; i < port->num_def_qps; i++)
883 napi_schedule(&port->port_res[i].napi);
884 }
885 #endif
886
887 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
888 {
889 struct ehea_port_res *pr = param;
890
891 napi_schedule(&pr->napi);
892
893 return IRQ_HANDLED;
894 }
895
896 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
897 {
898 struct ehea_port *port = param;
899 struct ehea_eqe *eqe;
900 struct ehea_qp *qp;
901 u32 qp_token;
902
903 eqe = ehea_poll_eq(port->qp_eq);
904
905 while (eqe) {
906 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
907 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
908 eqe->entry, qp_token);
909
910 qp = port->port_res[qp_token].qp;
911 ehea_error_data(port->adapter, qp->fw_handle);
912 eqe = ehea_poll_eq(port->qp_eq);
913 }
914
915 ehea_schedule_port_reset(port);
916
917 return IRQ_HANDLED;
918 }
919
920 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
921 int logical_port)
922 {
923 int i;
924
925 for (i = 0; i < EHEA_MAX_PORTS; i++)
926 if (adapter->port[i])
927 if (adapter->port[i]->logical_port_id == logical_port)
928 return adapter->port[i];
929 return NULL;
930 }
931
932 int ehea_sense_port_attr(struct ehea_port *port)
933 {
934 int ret;
935 u64 hret;
936 struct hcp_ehea_port_cb0 *cb0;
937
938 /* may be called via ehea_neq_tasklet() */
939 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
940 if (!cb0) {
941 ehea_error("no mem for cb0");
942 ret = -ENOMEM;
943 goto out;
944 }
945
946 hret = ehea_h_query_ehea_port(port->adapter->handle,
947 port->logical_port_id, H_PORT_CB0,
948 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
949 cb0);
950 if (hret != H_SUCCESS) {
951 ret = -EIO;
952 goto out_free;
953 }
954
955 /* MAC address */
956 port->mac_addr = cb0->port_mac_addr << 16;
957
958 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
959 ret = -EADDRNOTAVAIL;
960 goto out_free;
961 }
962
963 /* Port speed */
964 switch (cb0->port_speed) {
965 case H_SPEED_10M_H:
966 port->port_speed = EHEA_SPEED_10M;
967 port->full_duplex = 0;
968 break;
969 case H_SPEED_10M_F:
970 port->port_speed = EHEA_SPEED_10M;
971 port->full_duplex = 1;
972 break;
973 case H_SPEED_100M_H:
974 port->port_speed = EHEA_SPEED_100M;
975 port->full_duplex = 0;
976 break;
977 case H_SPEED_100M_F:
978 port->port_speed = EHEA_SPEED_100M;
979 port->full_duplex = 1;
980 break;
981 case H_SPEED_1G_F:
982 port->port_speed = EHEA_SPEED_1G;
983 port->full_duplex = 1;
984 break;
985 case H_SPEED_10G_F:
986 port->port_speed = EHEA_SPEED_10G;
987 port->full_duplex = 1;
988 break;
989 default:
990 port->port_speed = 0;
991 port->full_duplex = 0;
992 break;
993 }
994
995 port->autoneg = 1;
996 port->num_mcs = cb0->num_default_qps;
997
998 /* Number of default QPs */
999 if (use_mcs)
1000 port->num_def_qps = cb0->num_default_qps;
1001 else
1002 port->num_def_qps = 1;
1003
1004 if (!port->num_def_qps) {
1005 ret = -EINVAL;
1006 goto out_free;
1007 }
1008
1009 port->num_tx_qps = num_tx_qps;
1010
1011 if (port->num_def_qps >= port->num_tx_qps)
1012 port->num_add_tx_qps = 0;
1013 else
1014 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1015
1016 ret = 0;
1017 out_free:
1018 if (ret || netif_msg_probe(port))
1019 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1020 free_page((unsigned long)cb0);
1021 out:
1022 return ret;
1023 }
1024
1025 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1026 {
1027 struct hcp_ehea_port_cb4 *cb4;
1028 u64 hret;
1029 int ret = 0;
1030
1031 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1032 if (!cb4) {
1033 ehea_error("no mem for cb4");
1034 ret = -ENOMEM;
1035 goto out;
1036 }
1037
1038 cb4->port_speed = port_speed;
1039
1040 netif_carrier_off(port->netdev);
1041
1042 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1043 port->logical_port_id,
1044 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1045 if (hret == H_SUCCESS) {
1046 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1047
1048 hret = ehea_h_query_ehea_port(port->adapter->handle,
1049 port->logical_port_id,
1050 H_PORT_CB4, H_PORT_CB4_SPEED,
1051 cb4);
1052 if (hret == H_SUCCESS) {
1053 switch (cb4->port_speed) {
1054 case H_SPEED_10M_H:
1055 port->port_speed = EHEA_SPEED_10M;
1056 port->full_duplex = 0;
1057 break;
1058 case H_SPEED_10M_F:
1059 port->port_speed = EHEA_SPEED_10M;
1060 port->full_duplex = 1;
1061 break;
1062 case H_SPEED_100M_H:
1063 port->port_speed = EHEA_SPEED_100M;
1064 port->full_duplex = 0;
1065 break;
1066 case H_SPEED_100M_F:
1067 port->port_speed = EHEA_SPEED_100M;
1068 port->full_duplex = 1;
1069 break;
1070 case H_SPEED_1G_F:
1071 port->port_speed = EHEA_SPEED_1G;
1072 port->full_duplex = 1;
1073 break;
1074 case H_SPEED_10G_F:
1075 port->port_speed = EHEA_SPEED_10G;
1076 port->full_duplex = 1;
1077 break;
1078 default:
1079 port->port_speed = 0;
1080 port->full_duplex = 0;
1081 break;
1082 }
1083 } else {
1084 ehea_error("Failed sensing port speed");
1085 ret = -EIO;
1086 }
1087 } else {
1088 if (hret == H_AUTHORITY) {
1089 ehea_info("Hypervisor denied setting port speed");
1090 ret = -EPERM;
1091 } else {
1092 ret = -EIO;
1093 ehea_error("Failed setting port speed");
1094 }
1095 }
1096 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1097 netif_carrier_on(port->netdev);
1098
1099 free_page((unsigned long)cb4);
1100 out:
1101 return ret;
1102 }
1103
1104 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1105 {
1106 int ret;
1107 u8 ec;
1108 u8 portnum;
1109 struct ehea_port *port;
1110
1111 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1112 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1113 port = ehea_get_port(adapter, portnum);
1114
1115 switch (ec) {
1116 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1117
1118 if (!port) {
1119 ehea_error("unknown portnum %x", portnum);
1120 break;
1121 }
1122
1123 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1124 if (!netif_carrier_ok(port->netdev)) {
1125 ret = ehea_sense_port_attr(port);
1126 if (ret) {
1127 ehea_error("failed resensing port "
1128 "attributes");
1129 break;
1130 }
1131
1132 if (netif_msg_link(port))
1133 ehea_info("%s: Logical port up: %dMbps "
1134 "%s Duplex",
1135 port->netdev->name,
1136 port->port_speed,
1137 port->full_duplex ==
1138 1 ? "Full" : "Half");
1139
1140 netif_carrier_on(port->netdev);
1141 netif_wake_queue(port->netdev);
1142 }
1143 } else
1144 if (netif_carrier_ok(port->netdev)) {
1145 if (netif_msg_link(port))
1146 ehea_info("%s: Logical port down",
1147 port->netdev->name);
1148 netif_carrier_off(port->netdev);
1149 netif_stop_queue(port->netdev);
1150 }
1151
1152 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1153 port->phy_link = EHEA_PHY_LINK_UP;
1154 if (netif_msg_link(port))
1155 ehea_info("%s: Physical port up",
1156 port->netdev->name);
1157 if (prop_carrier_state)
1158 netif_carrier_on(port->netdev);
1159 } else {
1160 port->phy_link = EHEA_PHY_LINK_DOWN;
1161 if (netif_msg_link(port))
1162 ehea_info("%s: Physical port down",
1163 port->netdev->name);
1164 if (prop_carrier_state)
1165 netif_carrier_off(port->netdev);
1166 }
1167
1168 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1169 ehea_info("External switch port is primary port");
1170 else
1171 ehea_info("External switch port is backup port");
1172
1173 break;
1174 case EHEA_EC_ADAPTER_MALFUNC:
1175 ehea_error("Adapter malfunction");
1176 break;
1177 case EHEA_EC_PORT_MALFUNC:
1178 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1179 netif_carrier_off(port->netdev);
1180 netif_stop_queue(port->netdev);
1181 break;
1182 default:
1183 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1184 break;
1185 }
1186 }
1187
1188 static void ehea_neq_tasklet(unsigned long data)
1189 {
1190 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1191 struct ehea_eqe *eqe;
1192 u64 event_mask;
1193
1194 eqe = ehea_poll_eq(adapter->neq);
1195 ehea_debug("eqe=%p", eqe);
1196
1197 while (eqe) {
1198 ehea_debug("*eqe=%lx", eqe->entry);
1199 ehea_parse_eqe(adapter, eqe->entry);
1200 eqe = ehea_poll_eq(adapter->neq);
1201 ehea_debug("next eqe=%p", eqe);
1202 }
1203
1204 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1205 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1206 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1207
1208 ehea_h_reset_events(adapter->handle,
1209 adapter->neq->fw_handle, event_mask);
1210 }
1211
1212 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1213 {
1214 struct ehea_adapter *adapter = param;
1215 tasklet_hi_schedule(&adapter->neq_tasklet);
1216 return IRQ_HANDLED;
1217 }
1218
1219
1220 static int ehea_fill_port_res(struct ehea_port_res *pr)
1221 {
1222 int ret;
1223 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1224
1225 ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1226 - init_attr->act_nr_rwqes_rq2
1227 - init_attr->act_nr_rwqes_rq3 - 1);
1228
1229 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1230
1231 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1232
1233 return ret;
1234 }
1235
1236 static int ehea_reg_interrupts(struct net_device *dev)
1237 {
1238 struct ehea_port *port = netdev_priv(dev);
1239 struct ehea_port_res *pr;
1240 int i, ret;
1241
1242
1243 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1244 dev->name);
1245
1246 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1247 ehea_qp_aff_irq_handler,
1248 IRQF_DISABLED, port->int_aff_name, port);
1249 if (ret) {
1250 ehea_error("failed registering irq for qp_aff_irq_handler:"
1251 "ist=%X", port->qp_eq->attr.ist1);
1252 goto out_free_qpeq;
1253 }
1254
1255 if (netif_msg_ifup(port))
1256 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1257 "registered", port->qp_eq->attr.ist1);
1258
1259
1260 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1261 pr = &port->port_res[i];
1262 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1263 "%s-queue%d", dev->name, i);
1264 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1265 ehea_recv_irq_handler,
1266 IRQF_DISABLED, pr->int_send_name,
1267 pr);
1268 if (ret) {
1269 ehea_error("failed registering irq for ehea_queue "
1270 "port_res_nr:%d, ist=%X", i,
1271 pr->eq->attr.ist1);
1272 goto out_free_req;
1273 }
1274 if (netif_msg_ifup(port))
1275 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1276 "%d registered", pr->eq->attr.ist1, i);
1277 }
1278 out:
1279 return ret;
1280
1281
1282 out_free_req:
1283 while (--i >= 0) {
1284 u32 ist = port->port_res[i].eq->attr.ist1;
1285 ibmebus_free_irq(ist, &port->port_res[i]);
1286 }
1287
1288 out_free_qpeq:
1289 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1290 i = port->num_def_qps;
1291
1292 goto out;
1293
1294 }
1295
1296 static void ehea_free_interrupts(struct net_device *dev)
1297 {
1298 struct ehea_port *port = netdev_priv(dev);
1299 struct ehea_port_res *pr;
1300 int i;
1301
1302 /* send */
1303
1304 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1305 pr = &port->port_res[i];
1306 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1307 if (netif_msg_intr(port))
1308 ehea_info("free send irq for res %d with handle 0x%X",
1309 i, pr->eq->attr.ist1);
1310 }
1311
1312 /* associated events */
1313 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1314 if (netif_msg_intr(port))
1315 ehea_info("associated event interrupt for handle 0x%X freed",
1316 port->qp_eq->attr.ist1);
1317 }
1318
1319 static int ehea_configure_port(struct ehea_port *port)
1320 {
1321 int ret, i;
1322 u64 hret, mask;
1323 struct hcp_ehea_port_cb0 *cb0;
1324
1325 ret = -ENOMEM;
1326 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1327 if (!cb0)
1328 goto out;
1329
1330 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1331 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1332 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1333 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1334 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1335 PXLY_RC_VLAN_FILTER)
1336 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1337
1338 for (i = 0; i < port->num_mcs; i++)
1339 if (use_mcs)
1340 cb0->default_qpn_arr[i] =
1341 port->port_res[i].qp->init_attr.qp_nr;
1342 else
1343 cb0->default_qpn_arr[i] =
1344 port->port_res[0].qp->init_attr.qp_nr;
1345
1346 if (netif_msg_ifup(port))
1347 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1348
1349 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1350 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1351
1352 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1353 port->logical_port_id,
1354 H_PORT_CB0, mask, cb0);
1355 ret = -EIO;
1356 if (hret != H_SUCCESS)
1357 goto out_free;
1358
1359 ret = 0;
1360
1361 out_free:
1362 free_page((unsigned long)cb0);
1363 out:
1364 return ret;
1365 }
1366
1367 int ehea_gen_smrs(struct ehea_port_res *pr)
1368 {
1369 int ret;
1370 struct ehea_adapter *adapter = pr->port->adapter;
1371
1372 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1373 if (ret)
1374 goto out;
1375
1376 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1377 if (ret)
1378 goto out_free;
1379
1380 return 0;
1381
1382 out_free:
1383 ehea_rem_mr(&pr->send_mr);
1384 out:
1385 ehea_error("Generating SMRS failed\n");
1386 return -EIO;
1387 }
1388
1389 int ehea_rem_smrs(struct ehea_port_res *pr)
1390 {
1391 if ((ehea_rem_mr(&pr->send_mr))
1392 || (ehea_rem_mr(&pr->recv_mr)))
1393 return -EIO;
1394 else
1395 return 0;
1396 }
1397
1398 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1399 {
1400 int arr_size = sizeof(void *) * max_q_entries;
1401
1402 q_skba->arr = vmalloc(arr_size);
1403 if (!q_skba->arr)
1404 return -ENOMEM;
1405
1406 memset(q_skba->arr, 0, arr_size);
1407
1408 q_skba->len = max_q_entries;
1409 q_skba->index = 0;
1410 q_skba->os_skbs = 0;
1411
1412 return 0;
1413 }
1414
1415 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1416 struct port_res_cfg *pr_cfg, int queue_token)
1417 {
1418 struct ehea_adapter *adapter = port->adapter;
1419 enum ehea_eq_type eq_type = EHEA_EQ;
1420 struct ehea_qp_init_attr *init_attr = NULL;
1421 int ret = -EIO;
1422
1423 memset(pr, 0, sizeof(struct ehea_port_res));
1424
1425 pr->port = port;
1426 spin_lock_init(&pr->xmit_lock);
1427 spin_lock_init(&pr->netif_queue);
1428
1429 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1430 if (!pr->eq) {
1431 ehea_error("create_eq failed (eq)");
1432 goto out_free;
1433 }
1434
1435 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1436 pr->eq->fw_handle,
1437 port->logical_port_id);
1438 if (!pr->recv_cq) {
1439 ehea_error("create_cq failed (cq_recv)");
1440 goto out_free;
1441 }
1442
1443 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1444 pr->eq->fw_handle,
1445 port->logical_port_id);
1446 if (!pr->send_cq) {
1447 ehea_error("create_cq failed (cq_send)");
1448 goto out_free;
1449 }
1450
1451 if (netif_msg_ifup(port))
1452 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1453 pr->send_cq->attr.act_nr_of_cqes,
1454 pr->recv_cq->attr.act_nr_of_cqes);
1455
1456 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1457 if (!init_attr) {
1458 ret = -ENOMEM;
1459 ehea_error("no mem for ehea_qp_init_attr");
1460 goto out_free;
1461 }
1462
1463 init_attr->low_lat_rq1 = 1;
1464 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1465 init_attr->rq_count = 3;
1466 init_attr->qp_token = queue_token;
1467 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1468 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1469 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1470 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1471 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1472 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1473 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1474 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1475 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1476 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1477 init_attr->port_nr = port->logical_port_id;
1478 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1479 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1480 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1481
1482 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1483 if (!pr->qp) {
1484 ehea_error("create_qp failed");
1485 ret = -EIO;
1486 goto out_free;
1487 }
1488
1489 if (netif_msg_ifup(port))
1490 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1491 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1492 init_attr->act_nr_send_wqes,
1493 init_attr->act_nr_rwqes_rq1,
1494 init_attr->act_nr_rwqes_rq2,
1495 init_attr->act_nr_rwqes_rq3);
1496
1497 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1498
1499 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1500 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1501 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1502 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1503 if (ret)
1504 goto out_free;
1505
1506 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1507 if (ehea_gen_smrs(pr) != 0) {
1508 ret = -EIO;
1509 goto out_free;
1510 }
1511
1512 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1513
1514 kfree(init_attr);
1515
1516 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1517
1518 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1519 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1520 pr->lro_mgr.lro_arr = pr->lro_desc;
1521 pr->lro_mgr.get_skb_header = get_skb_hdr;
1522 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1523 pr->lro_mgr.dev = port->netdev;
1524 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1525 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1526
1527 ret = 0;
1528 goto out;
1529
1530 out_free:
1531 kfree(init_attr);
1532 vfree(pr->sq_skba.arr);
1533 vfree(pr->rq1_skba.arr);
1534 vfree(pr->rq2_skba.arr);
1535 vfree(pr->rq3_skba.arr);
1536 ehea_destroy_qp(pr->qp);
1537 ehea_destroy_cq(pr->send_cq);
1538 ehea_destroy_cq(pr->recv_cq);
1539 ehea_destroy_eq(pr->eq);
1540 out:
1541 return ret;
1542 }
1543
1544 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1545 {
1546 int ret, i;
1547
1548 ret = ehea_destroy_qp(pr->qp);
1549
1550 if (!ret) {
1551 ehea_destroy_cq(pr->send_cq);
1552 ehea_destroy_cq(pr->recv_cq);
1553 ehea_destroy_eq(pr->eq);
1554
1555 for (i = 0; i < pr->rq1_skba.len; i++)
1556 if (pr->rq1_skba.arr[i])
1557 dev_kfree_skb(pr->rq1_skba.arr[i]);
1558
1559 for (i = 0; i < pr->rq2_skba.len; i++)
1560 if (pr->rq2_skba.arr[i])
1561 dev_kfree_skb(pr->rq2_skba.arr[i]);
1562
1563 for (i = 0; i < pr->rq3_skba.len; i++)
1564 if (pr->rq3_skba.arr[i])
1565 dev_kfree_skb(pr->rq3_skba.arr[i]);
1566
1567 for (i = 0; i < pr->sq_skba.len; i++)
1568 if (pr->sq_skba.arr[i])
1569 dev_kfree_skb(pr->sq_skba.arr[i]);
1570
1571 vfree(pr->rq1_skba.arr);
1572 vfree(pr->rq2_skba.arr);
1573 vfree(pr->rq3_skba.arr);
1574 vfree(pr->sq_skba.arr);
1575 ret = ehea_rem_smrs(pr);
1576 }
1577 return ret;
1578 }
1579
1580 /*
1581 * The write_* functions store information in swqe which is used by
1582 * the hardware to calculate the ip/tcp/udp checksum
1583 */
1584
1585 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1586 const struct sk_buff *skb)
1587 {
1588 swqe->ip_start = skb_network_offset(skb);
1589 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1590 }
1591
1592 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1593 const struct sk_buff *skb)
1594 {
1595 swqe->tcp_offset =
1596 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1597
1598 swqe->tcp_end = (u16)skb->len - 1;
1599 }
1600
1601 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1602 const struct sk_buff *skb)
1603 {
1604 swqe->tcp_offset =
1605 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1606
1607 swqe->tcp_end = (u16)skb->len - 1;
1608 }
1609
1610
1611 static void write_swqe2_TSO(struct sk_buff *skb,
1612 struct ehea_swqe *swqe, u32 lkey)
1613 {
1614 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1615 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1616 int skb_data_size = skb->len - skb->data_len;
1617 int headersize;
1618
1619 /* Packet is TCP with TSO enabled */
1620 swqe->tx_control |= EHEA_SWQE_TSO;
1621 swqe->mss = skb_shinfo(skb)->gso_size;
1622 /* copy only eth/ip/tcp headers to immediate data and
1623 * the rest of skb->data to sg1entry
1624 */
1625 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1626
1627 skb_data_size = skb->len - skb->data_len;
1628
1629 if (skb_data_size >= headersize) {
1630 /* copy immediate data */
1631 skb_copy_from_linear_data(skb, imm_data, headersize);
1632 swqe->immediate_data_length = headersize;
1633
1634 if (skb_data_size > headersize) {
1635 /* set sg1entry data */
1636 sg1entry->l_key = lkey;
1637 sg1entry->len = skb_data_size - headersize;
1638 sg1entry->vaddr =
1639 ehea_map_vaddr(skb->data + headersize);
1640 swqe->descriptors++;
1641 }
1642 } else
1643 ehea_error("cannot handle fragmented headers");
1644 }
1645
1646 static void write_swqe2_nonTSO(struct sk_buff *skb,
1647 struct ehea_swqe *swqe, u32 lkey)
1648 {
1649 int skb_data_size = skb->len - skb->data_len;
1650 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1651 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1652
1653 /* Packet is any nonTSO type
1654 *
1655 * Copy as much as possible skb->data to immediate data and
1656 * the rest to sg1entry
1657 */
1658 if (skb_data_size >= SWQE2_MAX_IMM) {
1659 /* copy immediate data */
1660 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1661
1662 swqe->immediate_data_length = SWQE2_MAX_IMM;
1663
1664 if (skb_data_size > SWQE2_MAX_IMM) {
1665 /* copy sg1entry data */
1666 sg1entry->l_key = lkey;
1667 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1668 sg1entry->vaddr =
1669 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1670 swqe->descriptors++;
1671 }
1672 } else {
1673 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1674 swqe->immediate_data_length = skb_data_size;
1675 }
1676 }
1677
1678 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1679 struct ehea_swqe *swqe, u32 lkey)
1680 {
1681 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1682 skb_frag_t *frag;
1683 int nfrags, sg1entry_contains_frag_data, i;
1684
1685 nfrags = skb_shinfo(skb)->nr_frags;
1686 sg1entry = &swqe->u.immdata_desc.sg_entry;
1687 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1688 swqe->descriptors = 0;
1689 sg1entry_contains_frag_data = 0;
1690
1691 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1692 write_swqe2_TSO(skb, swqe, lkey);
1693 else
1694 write_swqe2_nonTSO(skb, swqe, lkey);
1695
1696 /* write descriptors */
1697 if (nfrags > 0) {
1698 if (swqe->descriptors == 0) {
1699 /* sg1entry not yet used */
1700 frag = &skb_shinfo(skb)->frags[0];
1701
1702 /* copy sg1entry data */
1703 sg1entry->l_key = lkey;
1704 sg1entry->len = frag->size;
1705 sg1entry->vaddr =
1706 ehea_map_vaddr(page_address(frag->page)
1707 + frag->page_offset);
1708 swqe->descriptors++;
1709 sg1entry_contains_frag_data = 1;
1710 }
1711
1712 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1713
1714 frag = &skb_shinfo(skb)->frags[i];
1715 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1716
1717 sgentry->l_key = lkey;
1718 sgentry->len = frag->size;
1719 sgentry->vaddr =
1720 ehea_map_vaddr(page_address(frag->page)
1721 + frag->page_offset);
1722 swqe->descriptors++;
1723 }
1724 }
1725 }
1726
1727 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1728 {
1729 int ret = 0;
1730 u64 hret;
1731 u8 reg_type;
1732
1733 /* De/Register untagged packets */
1734 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1735 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1736 port->logical_port_id,
1737 reg_type, port->mac_addr, 0, hcallid);
1738 if (hret != H_SUCCESS) {
1739 ehea_error("%sregistering bc address failed (tagged)",
1740 hcallid == H_REG_BCMC ? "" : "de");
1741 ret = -EIO;
1742 goto out_herr;
1743 }
1744
1745 /* De/Register VLAN packets */
1746 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1747 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1748 port->logical_port_id,
1749 reg_type, port->mac_addr, 0, hcallid);
1750 if (hret != H_SUCCESS) {
1751 ehea_error("%sregistering bc address failed (vlan)",
1752 hcallid == H_REG_BCMC ? "" : "de");
1753 ret = -EIO;
1754 }
1755 out_herr:
1756 return ret;
1757 }
1758
1759 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1760 {
1761 struct ehea_port *port = netdev_priv(dev);
1762 struct sockaddr *mac_addr = sa;
1763 struct hcp_ehea_port_cb0 *cb0;
1764 int ret;
1765 u64 hret;
1766
1767 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1768 ret = -EADDRNOTAVAIL;
1769 goto out;
1770 }
1771
1772 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1773 if (!cb0) {
1774 ehea_error("no mem for cb0");
1775 ret = -ENOMEM;
1776 goto out;
1777 }
1778
1779 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1780
1781 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1782
1783 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1784 port->logical_port_id, H_PORT_CB0,
1785 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1786 if (hret != H_SUCCESS) {
1787 ret = -EIO;
1788 goto out_free;
1789 }
1790
1791 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1792
1793 /* Deregister old MAC in pHYP */
1794 if (port->state == EHEA_PORT_UP) {
1795 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1796 if (ret)
1797 goto out_upregs;
1798 }
1799
1800 port->mac_addr = cb0->port_mac_addr << 16;
1801
1802 /* Register new MAC in pHYP */
1803 if (port->state == EHEA_PORT_UP) {
1804 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1805 if (ret)
1806 goto out_upregs;
1807 }
1808
1809 ret = 0;
1810
1811 out_upregs:
1812 ehea_update_bcmc_registrations();
1813 out_free:
1814 free_page((unsigned long)cb0);
1815 out:
1816 return ret;
1817 }
1818
1819 static void ehea_promiscuous_error(u64 hret, int enable)
1820 {
1821 if (hret == H_AUTHORITY)
1822 ehea_info("Hypervisor denied %sabling promiscuous mode",
1823 enable == 1 ? "en" : "dis");
1824 else
1825 ehea_error("failed %sabling promiscuous mode",
1826 enable == 1 ? "en" : "dis");
1827 }
1828
1829 static void ehea_promiscuous(struct net_device *dev, int enable)
1830 {
1831 struct ehea_port *port = netdev_priv(dev);
1832 struct hcp_ehea_port_cb7 *cb7;
1833 u64 hret;
1834
1835 if ((enable && port->promisc) || (!enable && !port->promisc))
1836 return;
1837
1838 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1839 if (!cb7) {
1840 ehea_error("no mem for cb7");
1841 goto out;
1842 }
1843
1844 /* Modify Pxs_DUCQPN in CB7 */
1845 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1846
1847 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1848 port->logical_port_id,
1849 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1850 if (hret) {
1851 ehea_promiscuous_error(hret, enable);
1852 goto out;
1853 }
1854
1855 port->promisc = enable;
1856 out:
1857 free_page((unsigned long)cb7);
1858 return;
1859 }
1860
1861 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1862 u32 hcallid)
1863 {
1864 u64 hret;
1865 u8 reg_type;
1866
1867 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1868 | EHEA_BCMC_UNTAGGED;
1869
1870 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1871 port->logical_port_id,
1872 reg_type, mc_mac_addr, 0, hcallid);
1873 if (hret)
1874 goto out;
1875
1876 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1877 | EHEA_BCMC_VLANID_ALL;
1878
1879 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1880 port->logical_port_id,
1881 reg_type, mc_mac_addr, 0, hcallid);
1882 out:
1883 return hret;
1884 }
1885
1886 static int ehea_drop_multicast_list(struct net_device *dev)
1887 {
1888 struct ehea_port *port = netdev_priv(dev);
1889 struct ehea_mc_list *mc_entry = port->mc_list;
1890 struct list_head *pos;
1891 struct list_head *temp;
1892 int ret = 0;
1893 u64 hret;
1894
1895 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1896 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1897
1898 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1899 H_DEREG_BCMC);
1900 if (hret) {
1901 ehea_error("failed deregistering mcast MAC");
1902 ret = -EIO;
1903 }
1904
1905 list_del(pos);
1906 kfree(mc_entry);
1907 }
1908 return ret;
1909 }
1910
1911 static void ehea_allmulti(struct net_device *dev, int enable)
1912 {
1913 struct ehea_port *port = netdev_priv(dev);
1914 u64 hret;
1915
1916 if (!port->allmulti) {
1917 if (enable) {
1918 /* Enable ALLMULTI */
1919 ehea_drop_multicast_list(dev);
1920 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1921 if (!hret)
1922 port->allmulti = 1;
1923 else
1924 ehea_error("failed enabling IFF_ALLMULTI");
1925 }
1926 } else
1927 if (!enable) {
1928 /* Disable ALLMULTI */
1929 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1930 if (!hret)
1931 port->allmulti = 0;
1932 else
1933 ehea_error("failed disabling IFF_ALLMULTI");
1934 }
1935 }
1936
1937 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1938 {
1939 struct ehea_mc_list *ehea_mcl_entry;
1940 u64 hret;
1941
1942 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1943 if (!ehea_mcl_entry) {
1944 ehea_error("no mem for mcl_entry");
1945 return;
1946 }
1947
1948 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1949
1950 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1951
1952 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1953 H_REG_BCMC);
1954 if (!hret)
1955 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1956 else {
1957 ehea_error("failed registering mcast MAC");
1958 kfree(ehea_mcl_entry);
1959 }
1960 }
1961
1962 static void ehea_set_multicast_list(struct net_device *dev)
1963 {
1964 struct ehea_port *port = netdev_priv(dev);
1965 struct dev_mc_list *k_mcl_entry;
1966 int ret, i;
1967
1968 if (dev->flags & IFF_PROMISC) {
1969 ehea_promiscuous(dev, 1);
1970 return;
1971 }
1972 ehea_promiscuous(dev, 0);
1973
1974 if (dev->flags & IFF_ALLMULTI) {
1975 ehea_allmulti(dev, 1);
1976 goto out;
1977 }
1978 ehea_allmulti(dev, 0);
1979
1980 if (dev->mc_count) {
1981 ret = ehea_drop_multicast_list(dev);
1982 if (ret) {
1983 /* Dropping the current multicast list failed.
1984 * Enabling ALL_MULTI is the best we can do.
1985 */
1986 ehea_allmulti(dev, 1);
1987 }
1988
1989 if (dev->mc_count > port->adapter->max_mc_mac) {
1990 ehea_info("Mcast registration limit reached (0x%llx). "
1991 "Use ALLMULTI!",
1992 port->adapter->max_mc_mac);
1993 goto out;
1994 }
1995
1996 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
1997 k_mcl_entry = k_mcl_entry->next)
1998 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1999
2000 }
2001 out:
2002 ehea_update_bcmc_registrations();
2003 return;
2004 }
2005
2006 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2007 {
2008 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2009 return -EINVAL;
2010 dev->mtu = new_mtu;
2011 return 0;
2012 }
2013
2014 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2015 struct ehea_swqe *swqe, u32 lkey)
2016 {
2017 if (skb->protocol == htons(ETH_P_IP)) {
2018 const struct iphdr *iph = ip_hdr(skb);
2019
2020 /* IPv4 */
2021 swqe->tx_control |= EHEA_SWQE_CRC
2022 | EHEA_SWQE_IP_CHECKSUM
2023 | EHEA_SWQE_TCP_CHECKSUM
2024 | EHEA_SWQE_IMM_DATA_PRESENT
2025 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2026
2027 write_ip_start_end(swqe, skb);
2028
2029 if (iph->protocol == IPPROTO_UDP) {
2030 if ((iph->frag_off & IP_MF)
2031 || (iph->frag_off & IP_OFFSET))
2032 /* IP fragment, so don't change cs */
2033 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2034 else
2035 write_udp_offset_end(swqe, skb);
2036 } else if (iph->protocol == IPPROTO_TCP) {
2037 write_tcp_offset_end(swqe, skb);
2038 }
2039
2040 /* icmp (big data) and ip segmentation packets (all other ip
2041 packets) do not require any special handling */
2042
2043 } else {
2044 /* Other Ethernet Protocol */
2045 swqe->tx_control |= EHEA_SWQE_CRC
2046 | EHEA_SWQE_IMM_DATA_PRESENT
2047 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2048 }
2049
2050 write_swqe2_data(skb, dev, swqe, lkey);
2051 }
2052
2053 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2054 struct ehea_swqe *swqe)
2055 {
2056 int nfrags = skb_shinfo(skb)->nr_frags;
2057 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2058 skb_frag_t *frag;
2059 int i;
2060
2061 if (skb->protocol == htons(ETH_P_IP)) {
2062 const struct iphdr *iph = ip_hdr(skb);
2063
2064 /* IPv4 */
2065 write_ip_start_end(swqe, skb);
2066
2067 if (iph->protocol == IPPROTO_TCP) {
2068 swqe->tx_control |= EHEA_SWQE_CRC
2069 | EHEA_SWQE_IP_CHECKSUM
2070 | EHEA_SWQE_TCP_CHECKSUM
2071 | EHEA_SWQE_IMM_DATA_PRESENT;
2072
2073 write_tcp_offset_end(swqe, skb);
2074
2075 } else if (iph->protocol == IPPROTO_UDP) {
2076 if ((iph->frag_off & IP_MF)
2077 || (iph->frag_off & IP_OFFSET))
2078 /* IP fragment, so don't change cs */
2079 swqe->tx_control |= EHEA_SWQE_CRC
2080 | EHEA_SWQE_IMM_DATA_PRESENT;
2081 else {
2082 swqe->tx_control |= EHEA_SWQE_CRC
2083 | EHEA_SWQE_IP_CHECKSUM
2084 | EHEA_SWQE_TCP_CHECKSUM
2085 | EHEA_SWQE_IMM_DATA_PRESENT;
2086
2087 write_udp_offset_end(swqe, skb);
2088 }
2089 } else {
2090 /* icmp (big data) and
2091 ip segmentation packets (all other ip packets) */
2092 swqe->tx_control |= EHEA_SWQE_CRC
2093 | EHEA_SWQE_IP_CHECKSUM
2094 | EHEA_SWQE_IMM_DATA_PRESENT;
2095 }
2096 } else {
2097 /* Other Ethernet Protocol */
2098 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2099 }
2100 /* copy (immediate) data */
2101 if (nfrags == 0) {
2102 /* data is in a single piece */
2103 skb_copy_from_linear_data(skb, imm_data, skb->len);
2104 } else {
2105 /* first copy data from the skb->data buffer ... */
2106 skb_copy_from_linear_data(skb, imm_data,
2107 skb->len - skb->data_len);
2108 imm_data += skb->len - skb->data_len;
2109
2110 /* ... then copy data from the fragments */
2111 for (i = 0; i < nfrags; i++) {
2112 frag = &skb_shinfo(skb)->frags[i];
2113 memcpy(imm_data,
2114 page_address(frag->page) + frag->page_offset,
2115 frag->size);
2116 imm_data += frag->size;
2117 }
2118 }
2119 swqe->immediate_data_length = skb->len;
2120 dev_kfree_skb(skb);
2121 }
2122
2123 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2124 {
2125 struct tcphdr *tcp;
2126 u32 tmp;
2127
2128 if ((skb->protocol == htons(ETH_P_IP)) &&
2129 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2130 tcp = (struct tcphdr *)(skb_network_header(skb) +
2131 (ip_hdr(skb)->ihl * 4));
2132 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2133 tmp += ip_hdr(skb)->daddr % 31;
2134 return tmp % num_qps;
2135 } else
2136 return 0;
2137 }
2138
2139 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2140 {
2141 struct ehea_port *port = netdev_priv(dev);
2142 struct ehea_swqe *swqe;
2143 unsigned long flags;
2144 u32 lkey;
2145 int swqe_index;
2146 struct ehea_port_res *pr;
2147
2148 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2149
2150 if (!spin_trylock(&pr->xmit_lock))
2151 return NETDEV_TX_BUSY;
2152
2153 if (pr->queue_stopped) {
2154 spin_unlock(&pr->xmit_lock);
2155 return NETDEV_TX_BUSY;
2156 }
2157
2158 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2159 memset(swqe, 0, SWQE_HEADER_SIZE);
2160 atomic_dec(&pr->swqe_avail);
2161
2162 if (skb->len <= SWQE3_MAX_IMM) {
2163 u32 sig_iv = port->sig_comp_iv;
2164 u32 swqe_num = pr->swqe_id_counter;
2165 ehea_xmit3(skb, dev, swqe);
2166 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2167 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2168 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2169 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2170 sig_iv);
2171 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2172 pr->swqe_ll_count = 0;
2173 } else
2174 pr->swqe_ll_count += 1;
2175 } else {
2176 swqe->wr_id =
2177 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2178 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2179 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2180 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2181 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2182
2183 pr->sq_skba.index++;
2184 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2185
2186 lkey = pr->send_mr.lkey;
2187 ehea_xmit2(skb, dev, swqe, lkey);
2188 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2189 }
2190 pr->swqe_id_counter += 1;
2191
2192 if (port->vgrp && vlan_tx_tag_present(skb)) {
2193 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2194 swqe->vlan_tag = vlan_tx_tag_get(skb);
2195 }
2196
2197 if (netif_msg_tx_queued(port)) {
2198 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2199 ehea_dump(swqe, 512, "swqe");
2200 }
2201
2202 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2203 netif_stop_queue(dev);
2204 swqe->tx_control |= EHEA_SWQE_PURGE;
2205 }
2206
2207 ehea_post_swqe(pr->qp, swqe);
2208 pr->tx_packets++;
2209
2210 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2211 spin_lock_irqsave(&pr->netif_queue, flags);
2212 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2213 pr->p_stats.queue_stopped++;
2214 netif_stop_queue(dev);
2215 pr->queue_stopped = 1;
2216 }
2217 spin_unlock_irqrestore(&pr->netif_queue, flags);
2218 }
2219 dev->trans_start = jiffies;
2220 spin_unlock(&pr->xmit_lock);
2221
2222 return NETDEV_TX_OK;
2223 }
2224
2225 static void ehea_vlan_rx_register(struct net_device *dev,
2226 struct vlan_group *grp)
2227 {
2228 struct ehea_port *port = netdev_priv(dev);
2229 struct ehea_adapter *adapter = port->adapter;
2230 struct hcp_ehea_port_cb1 *cb1;
2231 u64 hret;
2232
2233 port->vgrp = grp;
2234
2235 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2236 if (!cb1) {
2237 ehea_error("no mem for cb1");
2238 goto out;
2239 }
2240
2241 hret = ehea_h_modify_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("modify_ehea_port failed");
2245
2246 free_page((unsigned long)cb1);
2247 out:
2248 return;
2249 }
2250
2251 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2252 {
2253 struct ehea_port *port = netdev_priv(dev);
2254 struct ehea_adapter *adapter = port->adapter;
2255 struct hcp_ehea_port_cb1 *cb1;
2256 int index;
2257 u64 hret;
2258
2259 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2260 if (!cb1) {
2261 ehea_error("no mem for cb1");
2262 goto out;
2263 }
2264
2265 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2266 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2267 if (hret != H_SUCCESS) {
2268 ehea_error("query_ehea_port failed");
2269 goto out;
2270 }
2271
2272 index = (vid / 64);
2273 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2274
2275 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2276 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2277 if (hret != H_SUCCESS)
2278 ehea_error("modify_ehea_port failed");
2279 out:
2280 free_page((unsigned long)cb1);
2281 return;
2282 }
2283
2284 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2285 {
2286 struct ehea_port *port = netdev_priv(dev);
2287 struct ehea_adapter *adapter = port->adapter;
2288 struct hcp_ehea_port_cb1 *cb1;
2289 int index;
2290 u64 hret;
2291
2292 vlan_group_set_device(port->vgrp, vid, NULL);
2293
2294 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2295 if (!cb1) {
2296 ehea_error("no mem for cb1");
2297 goto out;
2298 }
2299
2300 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2301 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2302 if (hret != H_SUCCESS) {
2303 ehea_error("query_ehea_port failed");
2304 goto out;
2305 }
2306
2307 index = (vid / 64);
2308 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2309
2310 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2311 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2312 if (hret != H_SUCCESS)
2313 ehea_error("modify_ehea_port failed");
2314 out:
2315 free_page((unsigned long)cb1);
2316 return;
2317 }
2318
2319 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2320 {
2321 int ret = -EIO;
2322 u64 hret;
2323 u16 dummy16 = 0;
2324 u64 dummy64 = 0;
2325 struct hcp_modify_qp_cb0 *cb0;
2326
2327 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2328 if (!cb0) {
2329 ret = -ENOMEM;
2330 goto out;
2331 }
2332
2333 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2334 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2335 if (hret != H_SUCCESS) {
2336 ehea_error("query_ehea_qp failed (1)");
2337 goto out;
2338 }
2339
2340 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2341 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2342 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2343 &dummy64, &dummy64, &dummy16, &dummy16);
2344 if (hret != H_SUCCESS) {
2345 ehea_error("modify_ehea_qp failed (1)");
2346 goto out;
2347 }
2348
2349 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2350 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2351 if (hret != H_SUCCESS) {
2352 ehea_error("query_ehea_qp failed (2)");
2353 goto out;
2354 }
2355
2356 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2357 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2358 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2359 &dummy64, &dummy64, &dummy16, &dummy16);
2360 if (hret != H_SUCCESS) {
2361 ehea_error("modify_ehea_qp failed (2)");
2362 goto out;
2363 }
2364
2365 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2366 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2367 if (hret != H_SUCCESS) {
2368 ehea_error("query_ehea_qp failed (3)");
2369 goto out;
2370 }
2371
2372 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2373 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2374 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2375 &dummy64, &dummy64, &dummy16, &dummy16);
2376 if (hret != H_SUCCESS) {
2377 ehea_error("modify_ehea_qp failed (3)");
2378 goto out;
2379 }
2380
2381 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2382 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2383 if (hret != H_SUCCESS) {
2384 ehea_error("query_ehea_qp failed (4)");
2385 goto out;
2386 }
2387
2388 ret = 0;
2389 out:
2390 free_page((unsigned long)cb0);
2391 return ret;
2392 }
2393
2394 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2395 int add_tx_qps)
2396 {
2397 int ret, i;
2398 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2399 enum ehea_eq_type eq_type = EHEA_EQ;
2400
2401 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2402 EHEA_MAX_ENTRIES_EQ, 1);
2403 if (!port->qp_eq) {
2404 ret = -EINVAL;
2405 ehea_error("ehea_create_eq failed (qp_eq)");
2406 goto out_kill_eq;
2407 }
2408
2409 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2410 pr_cfg.max_entries_scq = sq_entries * 2;
2411 pr_cfg.max_entries_sq = sq_entries;
2412 pr_cfg.max_entries_rq1 = rq1_entries;
2413 pr_cfg.max_entries_rq2 = rq2_entries;
2414 pr_cfg.max_entries_rq3 = rq3_entries;
2415
2416 pr_cfg_small_rx.max_entries_rcq = 1;
2417 pr_cfg_small_rx.max_entries_scq = sq_entries;
2418 pr_cfg_small_rx.max_entries_sq = sq_entries;
2419 pr_cfg_small_rx.max_entries_rq1 = 1;
2420 pr_cfg_small_rx.max_entries_rq2 = 1;
2421 pr_cfg_small_rx.max_entries_rq3 = 1;
2422
2423 for (i = 0; i < def_qps; i++) {
2424 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2425 if (ret)
2426 goto out_clean_pr;
2427 }
2428 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2429 ret = ehea_init_port_res(port, &port->port_res[i],
2430 &pr_cfg_small_rx, i);
2431 if (ret)
2432 goto out_clean_pr;
2433 }
2434
2435 return 0;
2436
2437 out_clean_pr:
2438 while (--i >= 0)
2439 ehea_clean_portres(port, &port->port_res[i]);
2440
2441 out_kill_eq:
2442 ehea_destroy_eq(port->qp_eq);
2443 return ret;
2444 }
2445
2446 static int ehea_clean_all_portres(struct ehea_port *port)
2447 {
2448 int ret = 0;
2449 int i;
2450
2451 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2452 ret |= ehea_clean_portres(port, &port->port_res[i]);
2453
2454 ret |= ehea_destroy_eq(port->qp_eq);
2455
2456 return ret;
2457 }
2458
2459 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2460 {
2461 if (adapter->active_ports)
2462 return;
2463
2464 ehea_rem_mr(&adapter->mr);
2465 }
2466
2467 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2468 {
2469 if (adapter->active_ports)
2470 return 0;
2471
2472 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2473 }
2474
2475 static int ehea_up(struct net_device *dev)
2476 {
2477 int ret, i;
2478 struct ehea_port *port = netdev_priv(dev);
2479
2480 if (port->state == EHEA_PORT_UP)
2481 return 0;
2482
2483 ret = ehea_port_res_setup(port, port->num_def_qps,
2484 port->num_add_tx_qps);
2485 if (ret) {
2486 ehea_error("port_res_failed");
2487 goto out;
2488 }
2489
2490 /* Set default QP for this port */
2491 ret = ehea_configure_port(port);
2492 if (ret) {
2493 ehea_error("ehea_configure_port failed. ret:%d", ret);
2494 goto out_clean_pr;
2495 }
2496
2497 ret = ehea_reg_interrupts(dev);
2498 if (ret) {
2499 ehea_error("reg_interrupts failed. ret:%d", ret);
2500 goto out_clean_pr;
2501 }
2502
2503 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2504 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2505 if (ret) {
2506 ehea_error("activate_qp failed");
2507 goto out_free_irqs;
2508 }
2509 }
2510
2511 for (i = 0; i < port->num_def_qps; i++) {
2512 ret = ehea_fill_port_res(&port->port_res[i]);
2513 if (ret) {
2514 ehea_error("out_free_irqs");
2515 goto out_free_irqs;
2516 }
2517 }
2518
2519 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2520 if (ret) {
2521 ret = -EIO;
2522 goto out_free_irqs;
2523 }
2524
2525 port->state = EHEA_PORT_UP;
2526
2527 ret = 0;
2528 goto out;
2529
2530 out_free_irqs:
2531 ehea_free_interrupts(dev);
2532
2533 out_clean_pr:
2534 ehea_clean_all_portres(port);
2535 out:
2536 if (ret)
2537 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2538
2539 ehea_update_bcmc_registrations();
2540 ehea_update_firmware_handles();
2541
2542 return ret;
2543 }
2544
2545 static void port_napi_disable(struct ehea_port *port)
2546 {
2547 int i;
2548
2549 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2550 napi_disable(&port->port_res[i].napi);
2551 }
2552
2553 static void port_napi_enable(struct ehea_port *port)
2554 {
2555 int i;
2556
2557 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2558 napi_enable(&port->port_res[i].napi);
2559 }
2560
2561 static int ehea_open(struct net_device *dev)
2562 {
2563 int ret;
2564 struct ehea_port *port = netdev_priv(dev);
2565
2566 mutex_lock(&port->port_lock);
2567
2568 if (netif_msg_ifup(port))
2569 ehea_info("enabling port %s", dev->name);
2570
2571 ret = ehea_up(dev);
2572 if (!ret) {
2573 port_napi_enable(port);
2574 netif_start_queue(dev);
2575 }
2576
2577 mutex_unlock(&port->port_lock);
2578
2579 return ret;
2580 }
2581
2582 static int ehea_down(struct net_device *dev)
2583 {
2584 int ret;
2585 struct ehea_port *port = netdev_priv(dev);
2586
2587 if (port->state == EHEA_PORT_DOWN)
2588 return 0;
2589
2590 ehea_drop_multicast_list(dev);
2591 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2592
2593 ehea_free_interrupts(dev);
2594
2595 port->state = EHEA_PORT_DOWN;
2596
2597 ehea_update_bcmc_registrations();
2598
2599 ret = ehea_clean_all_portres(port);
2600 if (ret)
2601 ehea_info("Failed freeing resources for %s. ret=%i",
2602 dev->name, ret);
2603
2604 ehea_update_firmware_handles();
2605
2606 return ret;
2607 }
2608
2609 static int ehea_stop(struct net_device *dev)
2610 {
2611 int ret;
2612 struct ehea_port *port = netdev_priv(dev);
2613
2614 if (netif_msg_ifdown(port))
2615 ehea_info("disabling port %s", dev->name);
2616
2617 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2618 cancel_work_sync(&port->reset_task);
2619 mutex_lock(&port->port_lock);
2620 netif_stop_queue(dev);
2621 port_napi_disable(port);
2622 ret = ehea_down(dev);
2623 mutex_unlock(&port->port_lock);
2624 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2625 return ret;
2626 }
2627
2628 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2629 {
2630 struct ehea_qp qp = *orig_qp;
2631 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2632 struct ehea_swqe *swqe;
2633 int wqe_index;
2634 int i;
2635
2636 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2637 swqe = ehea_get_swqe(&qp, &wqe_index);
2638 swqe->tx_control |= EHEA_SWQE_PURGE;
2639 }
2640 }
2641
2642 static void ehea_flush_sq(struct ehea_port *port)
2643 {
2644 int i;
2645
2646 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2647 struct ehea_port_res *pr = &port->port_res[i];
2648 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2649 int k = 0;
2650 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2651 msleep(5);
2652 if (++k == 20)
2653 break;
2654 }
2655 }
2656 }
2657
2658 int ehea_stop_qps(struct net_device *dev)
2659 {
2660 struct ehea_port *port = netdev_priv(dev);
2661 struct ehea_adapter *adapter = port->adapter;
2662 struct hcp_modify_qp_cb0 *cb0;
2663 int ret = -EIO;
2664 int dret;
2665 int i;
2666 u64 hret;
2667 u64 dummy64 = 0;
2668 u16 dummy16 = 0;
2669
2670 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2671 if (!cb0) {
2672 ret = -ENOMEM;
2673 goto out;
2674 }
2675
2676 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2677 struct ehea_port_res *pr = &port->port_res[i];
2678 struct ehea_qp *qp = pr->qp;
2679
2680 /* Purge send queue */
2681 ehea_purge_sq(qp);
2682
2683 /* Disable queue pair */
2684 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2685 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2686 cb0);
2687 if (hret != H_SUCCESS) {
2688 ehea_error("query_ehea_qp failed (1)");
2689 goto out;
2690 }
2691
2692 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2693 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2694
2695 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2696 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2697 1), cb0, &dummy64,
2698 &dummy64, &dummy16, &dummy16);
2699 if (hret != H_SUCCESS) {
2700 ehea_error("modify_ehea_qp failed (1)");
2701 goto out;
2702 }
2703
2704 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2705 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2706 cb0);
2707 if (hret != H_SUCCESS) {
2708 ehea_error("query_ehea_qp failed (2)");
2709 goto out;
2710 }
2711
2712 /* deregister shared memory regions */
2713 dret = ehea_rem_smrs(pr);
2714 if (dret) {
2715 ehea_error("unreg shared memory region failed");
2716 goto out;
2717 }
2718 }
2719
2720 ret = 0;
2721 out:
2722 free_page((unsigned long)cb0);
2723
2724 return ret;
2725 }
2726
2727 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2728 {
2729 struct ehea_qp qp = *orig_qp;
2730 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2731 struct ehea_rwqe *rwqe;
2732 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2733 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2734 struct sk_buff *skb;
2735 u32 lkey = pr->recv_mr.lkey;
2736
2737
2738 int i;
2739 int index;
2740
2741 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2742 rwqe = ehea_get_next_rwqe(&qp, 2);
2743 rwqe->sg_list[0].l_key = lkey;
2744 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2745 skb = skba_rq2[index];
2746 if (skb)
2747 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2748 }
2749
2750 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2751 rwqe = ehea_get_next_rwqe(&qp, 3);
2752 rwqe->sg_list[0].l_key = lkey;
2753 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2754 skb = skba_rq3[index];
2755 if (skb)
2756 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2757 }
2758 }
2759
2760 int ehea_restart_qps(struct net_device *dev)
2761 {
2762 struct ehea_port *port = netdev_priv(dev);
2763 struct ehea_adapter *adapter = port->adapter;
2764 int ret = 0;
2765 int i;
2766
2767 struct hcp_modify_qp_cb0 *cb0;
2768 u64 hret;
2769 u64 dummy64 = 0;
2770 u16 dummy16 = 0;
2771
2772 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2773 if (!cb0) {
2774 ret = -ENOMEM;
2775 goto out;
2776 }
2777
2778 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2779 struct ehea_port_res *pr = &port->port_res[i];
2780 struct ehea_qp *qp = pr->qp;
2781
2782 ret = ehea_gen_smrs(pr);
2783 if (ret) {
2784 ehea_error("creation of shared memory regions failed");
2785 goto out;
2786 }
2787
2788 ehea_update_rqs(qp, pr);
2789
2790 /* Enable queue pair */
2791 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2792 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2793 cb0);
2794 if (hret != H_SUCCESS) {
2795 ehea_error("query_ehea_qp failed (1)");
2796 goto out;
2797 }
2798
2799 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2800 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2801
2802 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2803 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2804 1), cb0, &dummy64,
2805 &dummy64, &dummy16, &dummy16);
2806 if (hret != H_SUCCESS) {
2807 ehea_error("modify_ehea_qp failed (1)");
2808 goto out;
2809 }
2810
2811 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2812 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2813 cb0);
2814 if (hret != H_SUCCESS) {
2815 ehea_error("query_ehea_qp failed (2)");
2816 goto out;
2817 }
2818
2819 /* refill entire queue */
2820 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2821 ehea_refill_rq2(pr, 0);
2822 ehea_refill_rq3(pr, 0);
2823 }
2824 out:
2825 free_page((unsigned long)cb0);
2826
2827 return ret;
2828 }
2829
2830 static void ehea_reset_port(struct work_struct *work)
2831 {
2832 int ret;
2833 struct ehea_port *port =
2834 container_of(work, struct ehea_port, reset_task);
2835 struct net_device *dev = port->netdev;
2836
2837 port->resets++;
2838 mutex_lock(&port->port_lock);
2839 netif_stop_queue(dev);
2840
2841 port_napi_disable(port);
2842
2843 ehea_down(dev);
2844
2845 ret = ehea_up(dev);
2846 if (ret)
2847 goto out;
2848
2849 ehea_set_multicast_list(dev);
2850
2851 if (netif_msg_timer(port))
2852 ehea_info("Device %s resetted successfully", dev->name);
2853
2854 port_napi_enable(port);
2855
2856 netif_wake_queue(dev);
2857 out:
2858 mutex_unlock(&port->port_lock);
2859 return;
2860 }
2861
2862 static void ehea_rereg_mrs(struct work_struct *work)
2863 {
2864 int ret, i;
2865 struct ehea_adapter *adapter;
2866
2867 mutex_lock(&dlpar_mem_lock);
2868 ehea_info("LPAR memory changed - re-initializing driver");
2869
2870 list_for_each_entry(adapter, &adapter_list, list)
2871 if (adapter->active_ports) {
2872 /* Shutdown all ports */
2873 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2874 struct ehea_port *port = adapter->port[i];
2875 struct net_device *dev;
2876
2877 if (!port)
2878 continue;
2879
2880 dev = port->netdev;
2881
2882 if (dev->flags & IFF_UP) {
2883 mutex_lock(&port->port_lock);
2884 netif_stop_queue(dev);
2885 ehea_flush_sq(port);
2886 ret = ehea_stop_qps(dev);
2887 if (ret) {
2888 mutex_unlock(&port->port_lock);
2889 goto out;
2890 }
2891 port_napi_disable(port);
2892 mutex_unlock(&port->port_lock);
2893 }
2894 }
2895
2896 /* Unregister old memory region */
2897 ret = ehea_rem_mr(&adapter->mr);
2898 if (ret) {
2899 ehea_error("unregister MR failed - driver"
2900 " inoperable!");
2901 goto out;
2902 }
2903 }
2904
2905 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2906
2907 list_for_each_entry(adapter, &adapter_list, list)
2908 if (adapter->active_ports) {
2909 /* Register new memory region */
2910 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2911 if (ret) {
2912 ehea_error("register MR failed - driver"
2913 " inoperable!");
2914 goto out;
2915 }
2916
2917 /* Restart all ports */
2918 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2919 struct ehea_port *port = adapter->port[i];
2920
2921 if (port) {
2922 struct net_device *dev = port->netdev;
2923
2924 if (dev->flags & IFF_UP) {
2925 mutex_lock(&port->port_lock);
2926 port_napi_enable(port);
2927 ret = ehea_restart_qps(dev);
2928 if (!ret)
2929 netif_wake_queue(dev);
2930 mutex_unlock(&port->port_lock);
2931 }
2932 }
2933 }
2934 }
2935 ehea_info("re-initializing driver complete");
2936 out:
2937 mutex_unlock(&dlpar_mem_lock);
2938 return;
2939 }
2940
2941 static void ehea_tx_watchdog(struct net_device *dev)
2942 {
2943 struct ehea_port *port = netdev_priv(dev);
2944
2945 if (netif_carrier_ok(dev) &&
2946 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2947 ehea_schedule_port_reset(port);
2948 }
2949
2950 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2951 {
2952 struct hcp_query_ehea *cb;
2953 u64 hret;
2954 int ret;
2955
2956 cb = (void *)get_zeroed_page(GFP_KERNEL);
2957 if (!cb) {
2958 ret = -ENOMEM;
2959 goto out;
2960 }
2961
2962 hret = ehea_h_query_ehea(adapter->handle, cb);
2963
2964 if (hret != H_SUCCESS) {
2965 ret = -EIO;
2966 goto out_herr;
2967 }
2968
2969 adapter->max_mc_mac = cb->max_mc_mac - 1;
2970 ret = 0;
2971
2972 out_herr:
2973 free_page((unsigned long)cb);
2974 out:
2975 return ret;
2976 }
2977
2978 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2979 {
2980 struct hcp_ehea_port_cb4 *cb4;
2981 u64 hret;
2982 int ret = 0;
2983
2984 *jumbo = 0;
2985
2986 /* (Try to) enable *jumbo frames */
2987 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2988 if (!cb4) {
2989 ehea_error("no mem for cb4");
2990 ret = -ENOMEM;
2991 goto out;
2992 } else {
2993 hret = ehea_h_query_ehea_port(port->adapter->handle,
2994 port->logical_port_id,
2995 H_PORT_CB4,
2996 H_PORT_CB4_JUMBO, cb4);
2997 if (hret == H_SUCCESS) {
2998 if (cb4->jumbo_frame)
2999 *jumbo = 1;
3000 else {
3001 cb4->jumbo_frame = 1;
3002 hret = ehea_h_modify_ehea_port(port->adapter->
3003 handle,
3004 port->
3005 logical_port_id,
3006 H_PORT_CB4,
3007 H_PORT_CB4_JUMBO,
3008 cb4);
3009 if (hret == H_SUCCESS)
3010 *jumbo = 1;
3011 }
3012 } else
3013 ret = -EINVAL;
3014
3015 free_page((unsigned long)cb4);
3016 }
3017 out:
3018 return ret;
3019 }
3020
3021 static ssize_t ehea_show_port_id(struct device *dev,
3022 struct device_attribute *attr, char *buf)
3023 {
3024 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3025 return sprintf(buf, "%d", port->logical_port_id);
3026 }
3027
3028 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3029 NULL);
3030
3031 static void __devinit logical_port_release(struct device *dev)
3032 {
3033 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3034 of_node_put(port->ofdev.node);
3035 }
3036
3037 static struct device *ehea_register_port(struct ehea_port *port,
3038 struct device_node *dn)
3039 {
3040 int ret;
3041
3042 port->ofdev.node = of_node_get(dn);
3043 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3044 port->ofdev.dev.bus = &ibmebus_bus_type;
3045
3046 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3047 port->ofdev.dev.release = logical_port_release;
3048
3049 ret = of_device_register(&port->ofdev);
3050 if (ret) {
3051 ehea_error("failed to register device. ret=%d", ret);
3052 goto out;
3053 }
3054
3055 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3056 if (ret) {
3057 ehea_error("failed to register attributes, ret=%d", ret);
3058 goto out_unreg_of_dev;
3059 }
3060
3061 return &port->ofdev.dev;
3062
3063 out_unreg_of_dev:
3064 of_device_unregister(&port->ofdev);
3065 out:
3066 return NULL;
3067 }
3068
3069 static void ehea_unregister_port(struct ehea_port *port)
3070 {
3071 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3072 of_device_unregister(&port->ofdev);
3073 }
3074
3075 static const struct net_device_ops ehea_netdev_ops = {
3076 .ndo_open = ehea_open,
3077 .ndo_stop = ehea_stop,
3078 .ndo_start_xmit = ehea_start_xmit,
3079 #ifdef CONFIG_NET_POLL_CONTROLLER
3080 .ndo_poll_controller = ehea_netpoll,
3081 #endif
3082 .ndo_get_stats = ehea_get_stats,
3083 .ndo_set_mac_address = ehea_set_mac_addr,
3084 .ndo_set_multicast_list = ehea_set_multicast_list,
3085 .ndo_change_mtu = ehea_change_mtu,
3086 .ndo_vlan_rx_register = ehea_vlan_rx_register,
3087 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
3088 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
3089 .ndo_tx_timeout = ehea_tx_watchdog,
3090 };
3091
3092 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3093 u32 logical_port_id,
3094 struct device_node *dn)
3095 {
3096 int ret;
3097 struct net_device *dev;
3098 struct ehea_port *port;
3099 struct device *port_dev;
3100 int jumbo;
3101
3102 /* allocate memory for the port structures */
3103 dev = alloc_etherdev(sizeof(struct ehea_port));
3104
3105 if (!dev) {
3106 ehea_error("no mem for net_device");
3107 ret = -ENOMEM;
3108 goto out_err;
3109 }
3110
3111 port = netdev_priv(dev);
3112
3113 mutex_init(&port->port_lock);
3114 port->state = EHEA_PORT_DOWN;
3115 port->sig_comp_iv = sq_entries / 10;
3116
3117 port->adapter = adapter;
3118 port->netdev = dev;
3119 port->logical_port_id = logical_port_id;
3120
3121 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3122
3123 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3124 if (!port->mc_list) {
3125 ret = -ENOMEM;
3126 goto out_free_ethdev;
3127 }
3128
3129 INIT_LIST_HEAD(&port->mc_list->list);
3130
3131 ret = ehea_sense_port_attr(port);
3132 if (ret)
3133 goto out_free_mc_list;
3134
3135 port_dev = ehea_register_port(port, dn);
3136 if (!port_dev)
3137 goto out_free_mc_list;
3138
3139 SET_NETDEV_DEV(dev, port_dev);
3140
3141 /* initialize net_device structure */
3142 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3143
3144 dev->netdev_ops = &ehea_netdev_ops;
3145 ehea_set_ethtool_ops(dev);
3146
3147 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3148 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3149 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3150 | NETIF_F_LLTX;
3151 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3152
3153 INIT_WORK(&port->reset_task, ehea_reset_port);
3154
3155 ret = register_netdev(dev);
3156 if (ret) {
3157 ehea_error("register_netdev failed. ret=%d", ret);
3158 goto out_unreg_port;
3159 }
3160
3161 port->lro_max_aggr = lro_max_aggr;
3162
3163 ret = ehea_get_jumboframe_status(port, &jumbo);
3164 if (ret)
3165 ehea_error("failed determining jumbo frame status for %s",
3166 port->netdev->name);
3167
3168 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3169 jumbo == 1 ? "en" : "dis");
3170
3171 adapter->active_ports++;
3172
3173 return port;
3174
3175 out_unreg_port:
3176 ehea_unregister_port(port);
3177
3178 out_free_mc_list:
3179 kfree(port->mc_list);
3180
3181 out_free_ethdev:
3182 free_netdev(dev);
3183
3184 out_err:
3185 ehea_error("setting up logical port with id=%d failed, ret=%d",
3186 logical_port_id, ret);
3187 return NULL;
3188 }
3189
3190 static void ehea_shutdown_single_port(struct ehea_port *port)
3191 {
3192 struct ehea_adapter *adapter = port->adapter;
3193 unregister_netdev(port->netdev);
3194 ehea_unregister_port(port);
3195 kfree(port->mc_list);
3196 free_netdev(port->netdev);
3197 adapter->active_ports--;
3198 }
3199
3200 static int ehea_setup_ports(struct ehea_adapter *adapter)
3201 {
3202 struct device_node *lhea_dn;
3203 struct device_node *eth_dn = NULL;
3204
3205 const u32 *dn_log_port_id;
3206 int i = 0;
3207
3208 lhea_dn = adapter->ofdev->node;
3209 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3210
3211 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3212 NULL);
3213 if (!dn_log_port_id) {
3214 ehea_error("bad device node: eth_dn name=%s",
3215 eth_dn->full_name);
3216 continue;
3217 }
3218
3219 if (ehea_add_adapter_mr(adapter)) {
3220 ehea_error("creating MR failed");
3221 of_node_put(eth_dn);
3222 return -EIO;
3223 }
3224
3225 adapter->port[i] = ehea_setup_single_port(adapter,
3226 *dn_log_port_id,
3227 eth_dn);
3228 if (adapter->port[i])
3229 ehea_info("%s -> logical port id #%d",
3230 adapter->port[i]->netdev->name,
3231 *dn_log_port_id);
3232 else
3233 ehea_remove_adapter_mr(adapter);
3234
3235 i++;
3236 };
3237 return 0;
3238 }
3239
3240 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3241 u32 logical_port_id)
3242 {
3243 struct device_node *lhea_dn;
3244 struct device_node *eth_dn = NULL;
3245 const u32 *dn_log_port_id;
3246
3247 lhea_dn = adapter->ofdev->node;
3248 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3249
3250 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3251 NULL);
3252 if (dn_log_port_id)
3253 if (*dn_log_port_id == logical_port_id)
3254 return eth_dn;
3255 };
3256
3257 return NULL;
3258 }
3259
3260 static ssize_t ehea_probe_port(struct device *dev,
3261 struct device_attribute *attr,
3262 const char *buf, size_t count)
3263 {
3264 struct ehea_adapter *adapter = dev->driver_data;
3265 struct ehea_port *port;
3266 struct device_node *eth_dn = NULL;
3267 int i;
3268
3269 u32 logical_port_id;
3270
3271 sscanf(buf, "%d", &logical_port_id);
3272
3273 port = ehea_get_port(adapter, logical_port_id);
3274
3275 if (port) {
3276 ehea_info("adding port with logical port id=%d failed. port "
3277 "already configured as %s.", logical_port_id,
3278 port->netdev->name);
3279 return -EINVAL;
3280 }
3281
3282 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3283
3284 if (!eth_dn) {
3285 ehea_info("no logical port with id %d found", logical_port_id);
3286 return -EINVAL;
3287 }
3288
3289 if (ehea_add_adapter_mr(adapter)) {
3290 ehea_error("creating MR failed");
3291 return -EIO;
3292 }
3293
3294 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3295
3296 of_node_put(eth_dn);
3297
3298 if (port) {
3299 for (i = 0; i < EHEA_MAX_PORTS; i++)
3300 if (!adapter->port[i]) {
3301 adapter->port[i] = port;
3302 break;
3303 }
3304
3305 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3306 logical_port_id);
3307 } else {
3308 ehea_remove_adapter_mr(adapter);
3309 return -EIO;
3310 }
3311
3312 return (ssize_t) count;
3313 }
3314
3315 static ssize_t ehea_remove_port(struct device *dev,
3316 struct device_attribute *attr,
3317 const char *buf, size_t count)
3318 {
3319 struct ehea_adapter *adapter = dev->driver_data;
3320 struct ehea_port *port;
3321 int i;
3322 u32 logical_port_id;
3323
3324 sscanf(buf, "%d", &logical_port_id);
3325
3326 port = ehea_get_port(adapter, logical_port_id);
3327
3328 if (port) {
3329 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3330 logical_port_id);
3331
3332 ehea_shutdown_single_port(port);
3333
3334 for (i = 0; i < EHEA_MAX_PORTS; i++)
3335 if (adapter->port[i] == port) {
3336 adapter->port[i] = NULL;
3337 break;
3338 }
3339 } else {
3340 ehea_error("removing port with logical port id=%d failed. port "
3341 "not configured.", logical_port_id);
3342 return -EINVAL;
3343 }
3344
3345 ehea_remove_adapter_mr(adapter);
3346
3347 return (ssize_t) count;
3348 }
3349
3350 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3351 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3352
3353 int ehea_create_device_sysfs(struct of_device *dev)
3354 {
3355 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3356 if (ret)
3357 goto out;
3358
3359 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3360 out:
3361 return ret;
3362 }
3363
3364 void ehea_remove_device_sysfs(struct of_device *dev)
3365 {
3366 device_remove_file(&dev->dev, &dev_attr_probe_port);
3367 device_remove_file(&dev->dev, &dev_attr_remove_port);
3368 }
3369
3370 static int __devinit ehea_probe_adapter(struct of_device *dev,
3371 const struct of_device_id *id)
3372 {
3373 struct ehea_adapter *adapter;
3374 const u64 *adapter_handle;
3375 int ret;
3376
3377 if (!dev || !dev->node) {
3378 ehea_error("Invalid ibmebus device probed");
3379 return -EINVAL;
3380 }
3381
3382 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3383 if (!adapter) {
3384 ret = -ENOMEM;
3385 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3386 goto out;
3387 }
3388
3389 list_add(&adapter->list, &adapter_list);
3390
3391 adapter->ofdev = dev;
3392
3393 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3394 NULL);
3395 if (adapter_handle)
3396 adapter->handle = *adapter_handle;
3397
3398 if (!adapter->handle) {
3399 dev_err(&dev->dev, "failed getting handle for adapter"
3400 " '%s'\n", dev->node->full_name);
3401 ret = -ENODEV;
3402 goto out_free_ad;
3403 }
3404
3405 adapter->pd = EHEA_PD_ID;
3406
3407 dev->dev.driver_data = adapter;
3408
3409
3410 /* initialize adapter and ports */
3411 /* get adapter properties */
3412 ret = ehea_sense_adapter_attr(adapter);
3413 if (ret) {
3414 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3415 goto out_free_ad;
3416 }
3417
3418 adapter->neq = ehea_create_eq(adapter,
3419 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3420 if (!adapter->neq) {
3421 ret = -EIO;
3422 dev_err(&dev->dev, "NEQ creation failed\n");
3423 goto out_free_ad;
3424 }
3425
3426 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3427 (unsigned long)adapter);
3428
3429 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3430 ehea_interrupt_neq, IRQF_DISABLED,
3431 "ehea_neq", adapter);
3432 if (ret) {
3433 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3434 goto out_kill_eq;
3435 }
3436
3437 ret = ehea_create_device_sysfs(dev);
3438 if (ret)
3439 goto out_free_irq;
3440
3441 ret = ehea_setup_ports(adapter);
3442 if (ret) {
3443 dev_err(&dev->dev, "setup_ports failed\n");
3444 goto out_rem_dev_sysfs;
3445 }
3446
3447 ret = 0;
3448 goto out;
3449
3450 out_rem_dev_sysfs:
3451 ehea_remove_device_sysfs(dev);
3452
3453 out_free_irq:
3454 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3455
3456 out_kill_eq:
3457 ehea_destroy_eq(adapter->neq);
3458
3459 out_free_ad:
3460 list_del(&adapter->list);
3461 kfree(adapter);
3462
3463 out:
3464 ehea_update_firmware_handles();
3465
3466 return ret;
3467 }
3468
3469 static int __devexit ehea_remove(struct of_device *dev)
3470 {
3471 struct ehea_adapter *adapter = dev->dev.driver_data;
3472 int i;
3473
3474 for (i = 0; i < EHEA_MAX_PORTS; i++)
3475 if (adapter->port[i]) {
3476 ehea_shutdown_single_port(adapter->port[i]);
3477 adapter->port[i] = NULL;
3478 }
3479
3480 ehea_remove_device_sysfs(dev);
3481
3482 flush_scheduled_work();
3483
3484 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3485 tasklet_kill(&adapter->neq_tasklet);
3486
3487 ehea_destroy_eq(adapter->neq);
3488 ehea_remove_adapter_mr(adapter);
3489 list_del(&adapter->list);
3490 kfree(adapter);
3491
3492 ehea_update_firmware_handles();
3493
3494 return 0;
3495 }
3496
3497 void ehea_crash_handler(void)
3498 {
3499 int i;
3500
3501 if (ehea_fw_handles.arr)
3502 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3503 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3504 ehea_fw_handles.arr[i].fwh,
3505 FORCE_FREE);
3506
3507 if (ehea_bcmc_regs.arr)
3508 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3509 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3510 ehea_bcmc_regs.arr[i].port_id,
3511 ehea_bcmc_regs.arr[i].reg_type,
3512 ehea_bcmc_regs.arr[i].macaddr,
3513 0, H_DEREG_BCMC);
3514 }
3515
3516 static int ehea_mem_notifier(struct notifier_block *nb,
3517 unsigned long action, void *data)
3518 {
3519 struct memory_notify *arg = data;
3520 switch (action) {
3521 case MEM_CANCEL_OFFLINE:
3522 ehea_info("memory offlining canceled");
3523 /* Readd canceled memory block */
3524 case MEM_ONLINE:
3525 ehea_info("memory is going online");
3526 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3527 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3528 return NOTIFY_BAD;
3529 ehea_rereg_mrs(NULL);
3530 break;
3531 case MEM_GOING_OFFLINE:
3532 ehea_info("memory is going offline");
3533 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3534 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3535 return NOTIFY_BAD;
3536 ehea_rereg_mrs(NULL);
3537 break;
3538 default:
3539 break;
3540 }
3541
3542 ehea_update_firmware_handles();
3543
3544 return NOTIFY_OK;
3545 }
3546
3547 static struct notifier_block ehea_mem_nb = {
3548 .notifier_call = ehea_mem_notifier,
3549 };
3550
3551 static int ehea_reboot_notifier(struct notifier_block *nb,
3552 unsigned long action, void *unused)
3553 {
3554 if (action == SYS_RESTART) {
3555 ehea_info("Reboot: freeing all eHEA resources");
3556 ibmebus_unregister_driver(&ehea_driver);
3557 }
3558 return NOTIFY_DONE;
3559 }
3560
3561 static struct notifier_block ehea_reboot_nb = {
3562 .notifier_call = ehea_reboot_notifier,
3563 };
3564
3565 static int check_module_parm(void)
3566 {
3567 int ret = 0;
3568
3569 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3570 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3571 ehea_info("Bad parameter: rq1_entries");
3572 ret = -EINVAL;
3573 }
3574 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3575 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3576 ehea_info("Bad parameter: rq2_entries");
3577 ret = -EINVAL;
3578 }
3579 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3580 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3581 ehea_info("Bad parameter: rq3_entries");
3582 ret = -EINVAL;
3583 }
3584 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3585 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3586 ehea_info("Bad parameter: sq_entries");
3587 ret = -EINVAL;
3588 }
3589
3590 return ret;
3591 }
3592
3593 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3594 char *buf)
3595 {
3596 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3597 }
3598
3599 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3600 ehea_show_capabilities, NULL);
3601
3602 int __init ehea_module_init(void)
3603 {
3604 int ret;
3605
3606 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3607 DRV_VERSION);
3608
3609
3610 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3611 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3612 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3613
3614 mutex_init(&ehea_fw_handles.lock);
3615 spin_lock_init(&ehea_bcmc_regs.lock);
3616
3617 ret = check_module_parm();
3618 if (ret)
3619 goto out;
3620
3621 ret = ehea_create_busmap();
3622 if (ret)
3623 goto out;
3624
3625 ret = register_reboot_notifier(&ehea_reboot_nb);
3626 if (ret)
3627 ehea_info("failed registering reboot notifier");
3628
3629 ret = register_memory_notifier(&ehea_mem_nb);
3630 if (ret)
3631 ehea_info("failed registering memory remove notifier");
3632
3633 ret = crash_shutdown_register(&ehea_crash_handler);
3634 if (ret)
3635 ehea_info("failed registering crash handler");
3636
3637 ret = ibmebus_register_driver(&ehea_driver);
3638 if (ret) {
3639 ehea_error("failed registering eHEA device driver on ebus");
3640 goto out2;
3641 }
3642
3643 ret = driver_create_file(&ehea_driver.driver,
3644 &driver_attr_capabilities);
3645 if (ret) {
3646 ehea_error("failed to register capabilities attribute, ret=%d",
3647 ret);
3648 goto out3;
3649 }
3650
3651 return ret;
3652
3653 out3:
3654 ibmebus_unregister_driver(&ehea_driver);
3655 out2:
3656 unregister_memory_notifier(&ehea_mem_nb);
3657 unregister_reboot_notifier(&ehea_reboot_nb);
3658 crash_shutdown_unregister(&ehea_crash_handler);
3659 out:
3660 return ret;
3661 }
3662
3663 static void __exit ehea_module_exit(void)
3664 {
3665 int ret;
3666
3667 flush_scheduled_work();
3668 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3669 ibmebus_unregister_driver(&ehea_driver);
3670 unregister_reboot_notifier(&ehea_reboot_nb);
3671 ret = crash_shutdown_unregister(&ehea_crash_handler);
3672 if (ret)
3673 ehea_info("failed unregistering crash handler");
3674 unregister_memory_notifier(&ehea_mem_nb);
3675 kfree(ehea_fw_handles.arr);
3676 kfree(ehea_bcmc_regs.arr);
3677 ehea_destroy_busmap();
3678 }
3679
3680 module_init(ehea_module_init);
3681 module_exit(ehea_module_exit);
Linux for Ginger Game Console