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UBUNTU: Ubuntu-5.3.0-29.31
[mirror_ubuntu-eoan-kernel.git] / drivers / net / ethernet / ibm / ehea / ehea_main.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
4 *
5 * eHEA ethernet device driver for IBM eServer System p
6 *
7 * (C) Copyright IBM Corp. 2006
8 *
9 * Authors:
10 * Christoph Raisch <raisch@de.ibm.com>
11 * Jan-Bernd Themann <themann@de.ibm.com>
12 * Thomas Klein <tklein@de.ibm.com>
13 */
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #include <linux/device.h>
18 #include <linux/in.h>
19 #include <linux/ip.h>
20 #include <linux/tcp.h>
21 #include <linux/udp.h>
22 #include <linux/if.h>
23 #include <linux/list.h>
24 #include <linux/slab.h>
25 #include <linux/if_ether.h>
26 #include <linux/notifier.h>
27 #include <linux/reboot.h>
28 #include <linux/memory.h>
29 #include <asm/kexec.h>
30 #include <linux/mutex.h>
31 #include <linux/prefetch.h>
32
33 #include <net/ip.h>
34
35 #include "ehea.h"
36 #include "ehea_qmr.h"
37 #include "ehea_phyp.h"
38
39
40 MODULE_LICENSE("GPL");
41 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
42 MODULE_DESCRIPTION("IBM eServer HEA Driver");
43 MODULE_VERSION(DRV_VERSION);
44
45
46 static int msg_level = -1;
47 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
48 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
49 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
50 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
51 static int use_mcs = 1;
52 static int prop_carrier_state;
53
54 module_param(msg_level, int, 0);
55 module_param(rq1_entries, int, 0);
56 module_param(rq2_entries, int, 0);
57 module_param(rq3_entries, int, 0);
58 module_param(sq_entries, int, 0);
59 module_param(prop_carrier_state, int, 0);
60 module_param(use_mcs, int, 0);
61
62 MODULE_PARM_DESC(msg_level, "msg_level");
63 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
64 "port to stack. 1:yes, 0:no. Default = 0 ");
65 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
66 "[2^x - 1], x = [7..14]. Default = "
67 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
68 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
69 "[2^x - 1], x = [7..14]. Default = "
70 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
71 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
72 "[2^x - 1], x = [7..14]. Default = "
73 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
74 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
75 "[2^x - 1], x = [7..14]. Default = "
76 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
77 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
78 "Default = 1");
79
80 static int port_name_cnt;
81 static LIST_HEAD(adapter_list);
82 static unsigned long ehea_driver_flags;
83 static DEFINE_MUTEX(dlpar_mem_lock);
84 static struct ehea_fw_handle_array ehea_fw_handles;
85 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
86
87
88 static int ehea_probe_adapter(struct platform_device *dev);
89
90 static int ehea_remove(struct platform_device *dev);
91
92 static const struct of_device_id ehea_module_device_table[] = {
93 {
94 .name = "lhea",
95 .compatible = "IBM,lhea",
96 },
97 {
98 .type = "network",
99 .compatible = "IBM,lhea-ethernet",
100 },
101 {},
102 };
103 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
104
105 static const struct of_device_id ehea_device_table[] = {
106 {
107 .name = "lhea",
108 .compatible = "IBM,lhea",
109 },
110 {},
111 };
112
113 static struct platform_driver ehea_driver = {
114 .driver = {
115 .name = "ehea",
116 .owner = THIS_MODULE,
117 .of_match_table = ehea_device_table,
118 },
119 .probe = ehea_probe_adapter,
120 .remove = ehea_remove,
121 };
122
123 void ehea_dump(void *adr, int len, char *msg)
124 {
125 int x;
126 unsigned char *deb = adr;
127 for (x = 0; x < len; x += 16) {
128 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
129 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
130 deb += 16;
131 }
132 }
133
134 static void ehea_schedule_port_reset(struct ehea_port *port)
135 {
136 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
137 schedule_work(&port->reset_task);
138 }
139
140 static void ehea_update_firmware_handles(void)
141 {
142 struct ehea_fw_handle_entry *arr = NULL;
143 struct ehea_adapter *adapter;
144 int num_adapters = 0;
145 int num_ports = 0;
146 int num_portres = 0;
147 int i = 0;
148 int num_fw_handles, k, l;
149
150 /* Determine number of handles */
151 mutex_lock(&ehea_fw_handles.lock);
152
153 list_for_each_entry(adapter, &adapter_list, list) {
154 num_adapters++;
155
156 for (k = 0; k < EHEA_MAX_PORTS; k++) {
157 struct ehea_port *port = adapter->port[k];
158
159 if (!port || (port->state != EHEA_PORT_UP))
160 continue;
161
162 num_ports++;
163 num_portres += port->num_def_qps;
164 }
165 }
166
167 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
168 num_ports * EHEA_NUM_PORT_FW_HANDLES +
169 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
170
171 if (num_fw_handles) {
172 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
173 if (!arr)
174 goto out; /* Keep the existing array */
175 } else
176 goto out_update;
177
178 list_for_each_entry(adapter, &adapter_list, list) {
179 if (num_adapters == 0)
180 break;
181
182 for (k = 0; k < EHEA_MAX_PORTS; k++) {
183 struct ehea_port *port = adapter->port[k];
184
185 if (!port || (port->state != EHEA_PORT_UP) ||
186 (num_ports == 0))
187 continue;
188
189 for (l = 0; l < port->num_def_qps; l++) {
190 struct ehea_port_res *pr = &port->port_res[l];
191
192 arr[i].adh = adapter->handle;
193 arr[i++].fwh = pr->qp->fw_handle;
194 arr[i].adh = adapter->handle;
195 arr[i++].fwh = pr->send_cq->fw_handle;
196 arr[i].adh = adapter->handle;
197 arr[i++].fwh = pr->recv_cq->fw_handle;
198 arr[i].adh = adapter->handle;
199 arr[i++].fwh = pr->eq->fw_handle;
200 arr[i].adh = adapter->handle;
201 arr[i++].fwh = pr->send_mr.handle;
202 arr[i].adh = adapter->handle;
203 arr[i++].fwh = pr->recv_mr.handle;
204 }
205 arr[i].adh = adapter->handle;
206 arr[i++].fwh = port->qp_eq->fw_handle;
207 num_ports--;
208 }
209
210 arr[i].adh = adapter->handle;
211 arr[i++].fwh = adapter->neq->fw_handle;
212
213 if (adapter->mr.handle) {
214 arr[i].adh = adapter->handle;
215 arr[i++].fwh = adapter->mr.handle;
216 }
217 num_adapters--;
218 }
219
220 out_update:
221 kfree(ehea_fw_handles.arr);
222 ehea_fw_handles.arr = arr;
223 ehea_fw_handles.num_entries = i;
224 out:
225 mutex_unlock(&ehea_fw_handles.lock);
226 }
227
228 static void ehea_update_bcmc_registrations(void)
229 {
230 unsigned long flags;
231 struct ehea_bcmc_reg_entry *arr = NULL;
232 struct ehea_adapter *adapter;
233 struct ehea_mc_list *mc_entry;
234 int num_registrations = 0;
235 int i = 0;
236 int k;
237
238 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
239
240 /* Determine number of registrations */
241 list_for_each_entry(adapter, &adapter_list, list)
242 for (k = 0; k < EHEA_MAX_PORTS; k++) {
243 struct ehea_port *port = adapter->port[k];
244
245 if (!port || (port->state != EHEA_PORT_UP))
246 continue;
247
248 num_registrations += 2; /* Broadcast registrations */
249
250 list_for_each_entry(mc_entry, &port->mc_list->list,list)
251 num_registrations += 2;
252 }
253
254 if (num_registrations) {
255 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
256 if (!arr)
257 goto out; /* Keep the existing array */
258 } else
259 goto out_update;
260
261 list_for_each_entry(adapter, &adapter_list, list) {
262 for (k = 0; k < EHEA_MAX_PORTS; k++) {
263 struct ehea_port *port = adapter->port[k];
264
265 if (!port || (port->state != EHEA_PORT_UP))
266 continue;
267
268 if (num_registrations == 0)
269 goto out_update;
270
271 arr[i].adh = adapter->handle;
272 arr[i].port_id = port->logical_port_id;
273 arr[i].reg_type = EHEA_BCMC_BROADCAST |
274 EHEA_BCMC_UNTAGGED;
275 arr[i++].macaddr = port->mac_addr;
276
277 arr[i].adh = adapter->handle;
278 arr[i].port_id = port->logical_port_id;
279 arr[i].reg_type = EHEA_BCMC_BROADCAST |
280 EHEA_BCMC_VLANID_ALL;
281 arr[i++].macaddr = port->mac_addr;
282 num_registrations -= 2;
283
284 list_for_each_entry(mc_entry,
285 &port->mc_list->list, list) {
286 if (num_registrations == 0)
287 goto out_update;
288
289 arr[i].adh = adapter->handle;
290 arr[i].port_id = port->logical_port_id;
291 arr[i].reg_type = EHEA_BCMC_MULTICAST |
292 EHEA_BCMC_UNTAGGED;
293 if (mc_entry->macaddr == 0)
294 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
295 arr[i++].macaddr = mc_entry->macaddr;
296
297 arr[i].adh = adapter->handle;
298 arr[i].port_id = port->logical_port_id;
299 arr[i].reg_type = EHEA_BCMC_MULTICAST |
300 EHEA_BCMC_VLANID_ALL;
301 if (mc_entry->macaddr == 0)
302 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
303 arr[i++].macaddr = mc_entry->macaddr;
304 num_registrations -= 2;
305 }
306 }
307 }
308
309 out_update:
310 kfree(ehea_bcmc_regs.arr);
311 ehea_bcmc_regs.arr = arr;
312 ehea_bcmc_regs.num_entries = i;
313 out:
314 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
315 }
316
317 static void ehea_get_stats64(struct net_device *dev,
318 struct rtnl_link_stats64 *stats)
319 {
320 struct ehea_port *port = netdev_priv(dev);
321 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
322 int i;
323
324 for (i = 0; i < port->num_def_qps; i++) {
325 rx_packets += port->port_res[i].rx_packets;
326 rx_bytes += port->port_res[i].rx_bytes;
327 }
328
329 for (i = 0; i < port->num_def_qps; i++) {
330 tx_packets += port->port_res[i].tx_packets;
331 tx_bytes += port->port_res[i].tx_bytes;
332 }
333
334 stats->tx_packets = tx_packets;
335 stats->rx_bytes = rx_bytes;
336 stats->tx_bytes = tx_bytes;
337 stats->rx_packets = rx_packets;
338
339 stats->multicast = port->stats.multicast;
340 stats->rx_errors = port->stats.rx_errors;
341 }
342
343 static void ehea_update_stats(struct work_struct *work)
344 {
345 struct ehea_port *port =
346 container_of(work, struct ehea_port, stats_work.work);
347 struct net_device *dev = port->netdev;
348 struct rtnl_link_stats64 *stats = &port->stats;
349 struct hcp_ehea_port_cb2 *cb2;
350 u64 hret;
351
352 cb2 = (void *)get_zeroed_page(GFP_KERNEL);
353 if (!cb2) {
354 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
355 goto resched;
356 }
357
358 hret = ehea_h_query_ehea_port(port->adapter->handle,
359 port->logical_port_id,
360 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
361 if (hret != H_SUCCESS) {
362 netdev_err(dev, "query_ehea_port failed\n");
363 goto out_herr;
364 }
365
366 if (netif_msg_hw(port))
367 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
368
369 stats->multicast = cb2->rxmcp;
370 stats->rx_errors = cb2->rxuerr;
371
372 out_herr:
373 free_page((unsigned long)cb2);
374 resched:
375 schedule_delayed_work(&port->stats_work,
376 round_jiffies_relative(msecs_to_jiffies(1000)));
377 }
378
379 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
380 {
381 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
382 struct net_device *dev = pr->port->netdev;
383 int max_index_mask = pr->rq1_skba.len - 1;
384 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
385 int adder = 0;
386 int i;
387
388 pr->rq1_skba.os_skbs = 0;
389
390 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
391 if (nr_of_wqes > 0)
392 pr->rq1_skba.index = index;
393 pr->rq1_skba.os_skbs = fill_wqes;
394 return;
395 }
396
397 for (i = 0; i < fill_wqes; i++) {
398 if (!skb_arr_rq1[index]) {
399 skb_arr_rq1[index] = netdev_alloc_skb(dev,
400 EHEA_L_PKT_SIZE);
401 if (!skb_arr_rq1[index]) {
402 pr->rq1_skba.os_skbs = fill_wqes - i;
403 break;
404 }
405 }
406 index--;
407 index &= max_index_mask;
408 adder++;
409 }
410
411 if (adder == 0)
412 return;
413
414 /* Ring doorbell */
415 ehea_update_rq1a(pr->qp, adder);
416 }
417
418 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
419 {
420 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
421 struct net_device *dev = pr->port->netdev;
422 int i;
423
424 if (nr_rq1a > pr->rq1_skba.len) {
425 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
426 return;
427 }
428
429 for (i = 0; i < nr_rq1a; i++) {
430 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
431 if (!skb_arr_rq1[i])
432 break;
433 }
434 /* Ring doorbell */
435 ehea_update_rq1a(pr->qp, i - 1);
436 }
437
438 static int ehea_refill_rq_def(struct ehea_port_res *pr,
439 struct ehea_q_skb_arr *q_skba, int rq_nr,
440 int num_wqes, int wqe_type, int packet_size)
441 {
442 struct net_device *dev = pr->port->netdev;
443 struct ehea_qp *qp = pr->qp;
444 struct sk_buff **skb_arr = q_skba->arr;
445 struct ehea_rwqe *rwqe;
446 int i, index, max_index_mask, fill_wqes;
447 int adder = 0;
448 int ret = 0;
449
450 fill_wqes = q_skba->os_skbs + num_wqes;
451 q_skba->os_skbs = 0;
452
453 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
454 q_skba->os_skbs = fill_wqes;
455 return ret;
456 }
457
458 index = q_skba->index;
459 max_index_mask = q_skba->len - 1;
460 for (i = 0; i < fill_wqes; i++) {
461 u64 tmp_addr;
462 struct sk_buff *skb;
463
464 skb = netdev_alloc_skb_ip_align(dev, packet_size);
465 if (!skb) {
466 q_skba->os_skbs = fill_wqes - i;
467 if (q_skba->os_skbs == q_skba->len - 2) {
468 netdev_info(pr->port->netdev,
469 "rq%i ran dry - no mem for skb\n",
470 rq_nr);
471 ret = -ENOMEM;
472 }
473 break;
474 }
475
476 skb_arr[index] = skb;
477 tmp_addr = ehea_map_vaddr(skb->data);
478 if (tmp_addr == -1) {
479 dev_consume_skb_any(skb);
480 q_skba->os_skbs = fill_wqes - i;
481 ret = 0;
482 break;
483 }
484
485 rwqe = ehea_get_next_rwqe(qp, rq_nr);
486 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
487 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
488 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
489 rwqe->sg_list[0].vaddr = tmp_addr;
490 rwqe->sg_list[0].len = packet_size;
491 rwqe->data_segments = 1;
492
493 index++;
494 index &= max_index_mask;
495 adder++;
496 }
497
498 q_skba->index = index;
499 if (adder == 0)
500 goto out;
501
502 /* Ring doorbell */
503 iosync();
504 if (rq_nr == 2)
505 ehea_update_rq2a(pr->qp, adder);
506 else
507 ehea_update_rq3a(pr->qp, adder);
508 out:
509 return ret;
510 }
511
512
513 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
514 {
515 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
516 nr_of_wqes, EHEA_RWQE2_TYPE,
517 EHEA_RQ2_PKT_SIZE);
518 }
519
520
521 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
522 {
523 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
524 nr_of_wqes, EHEA_RWQE3_TYPE,
525 EHEA_MAX_PACKET_SIZE);
526 }
527
528 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
529 {
530 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
531 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
532 return 0;
533 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
534 (cqe->header_length == 0))
535 return 0;
536 return -EINVAL;
537 }
538
539 static inline void ehea_fill_skb(struct net_device *dev,
540 struct sk_buff *skb, struct ehea_cqe *cqe,
541 struct ehea_port_res *pr)
542 {
543 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
544
545 skb_put(skb, length);
546 skb->protocol = eth_type_trans(skb, dev);
547
548 /* The packet was not an IPV4 packet so a complemented checksum was
549 calculated. The value is found in the Internet Checksum field. */
550 if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
551 skb->ip_summed = CHECKSUM_COMPLETE;
552 skb->csum = csum_unfold(~cqe->inet_checksum_value);
553 } else
554 skb->ip_summed = CHECKSUM_UNNECESSARY;
555
556 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
557 }
558
559 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
560 int arr_len,
561 struct ehea_cqe *cqe)
562 {
563 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
564 struct sk_buff *skb;
565 void *pref;
566 int x;
567
568 x = skb_index + 1;
569 x &= (arr_len - 1);
570
571 pref = skb_array[x];
572 if (pref) {
573 prefetchw(pref);
574 prefetchw(pref + EHEA_CACHE_LINE);
575
576 pref = (skb_array[x]->data);
577 prefetch(pref);
578 prefetch(pref + EHEA_CACHE_LINE);
579 prefetch(pref + EHEA_CACHE_LINE * 2);
580 prefetch(pref + EHEA_CACHE_LINE * 3);
581 }
582
583 skb = skb_array[skb_index];
584 skb_array[skb_index] = NULL;
585 return skb;
586 }
587
588 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
589 int arr_len, int wqe_index)
590 {
591 struct sk_buff *skb;
592 void *pref;
593 int x;
594
595 x = wqe_index + 1;
596 x &= (arr_len - 1);
597
598 pref = skb_array[x];
599 if (pref) {
600 prefetchw(pref);
601 prefetchw(pref + EHEA_CACHE_LINE);
602
603 pref = (skb_array[x]->data);
604 prefetchw(pref);
605 prefetchw(pref + EHEA_CACHE_LINE);
606 }
607
608 skb = skb_array[wqe_index];
609 skb_array[wqe_index] = NULL;
610 return skb;
611 }
612
613 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
614 struct ehea_cqe *cqe, int *processed_rq2,
615 int *processed_rq3)
616 {
617 struct sk_buff *skb;
618
619 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
620 pr->p_stats.err_tcp_cksum++;
621 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
622 pr->p_stats.err_ip_cksum++;
623 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
624 pr->p_stats.err_frame_crc++;
625
626 if (rq == 2) {
627 *processed_rq2 += 1;
628 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
629 dev_kfree_skb(skb);
630 } else if (rq == 3) {
631 *processed_rq3 += 1;
632 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
633 dev_kfree_skb(skb);
634 }
635
636 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
637 if (netif_msg_rx_err(pr->port)) {
638 pr_err("Critical receive error for QP %d. Resetting port.\n",
639 pr->qp->init_attr.qp_nr);
640 ehea_dump(cqe, sizeof(*cqe), "CQE");
641 }
642 ehea_schedule_port_reset(pr->port);
643 return 1;
644 }
645
646 return 0;
647 }
648
649 static int ehea_proc_rwqes(struct net_device *dev,
650 struct ehea_port_res *pr,
651 int budget)
652 {
653 struct ehea_port *port = pr->port;
654 struct ehea_qp *qp = pr->qp;
655 struct ehea_cqe *cqe;
656 struct sk_buff *skb;
657 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
658 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
659 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
660 int skb_arr_rq1_len = pr->rq1_skba.len;
661 int skb_arr_rq2_len = pr->rq2_skba.len;
662 int skb_arr_rq3_len = pr->rq3_skba.len;
663 int processed, processed_rq1, processed_rq2, processed_rq3;
664 u64 processed_bytes = 0;
665 int wqe_index, last_wqe_index, rq, port_reset;
666
667 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
668 last_wqe_index = 0;
669
670 cqe = ehea_poll_rq1(qp, &wqe_index);
671 while ((processed < budget) && cqe) {
672 ehea_inc_rq1(qp);
673 processed_rq1++;
674 processed++;
675 if (netif_msg_rx_status(port))
676 ehea_dump(cqe, sizeof(*cqe), "CQE");
677
678 last_wqe_index = wqe_index;
679 rmb();
680 if (!ehea_check_cqe(cqe, &rq)) {
681 if (rq == 1) {
682 /* LL RQ1 */
683 skb = get_skb_by_index_ll(skb_arr_rq1,
684 skb_arr_rq1_len,
685 wqe_index);
686 if (unlikely(!skb)) {
687 netif_info(port, rx_err, dev,
688 "LL rq1: skb=NULL\n");
689
690 skb = netdev_alloc_skb(dev,
691 EHEA_L_PKT_SIZE);
692 if (!skb)
693 break;
694 }
695 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
696 cqe->num_bytes_transfered - 4);
697 ehea_fill_skb(dev, skb, cqe, pr);
698 } else if (rq == 2) {
699 /* RQ2 */
700 skb = get_skb_by_index(skb_arr_rq2,
701 skb_arr_rq2_len, cqe);
702 if (unlikely(!skb)) {
703 netif_err(port, rx_err, dev,
704 "rq2: skb=NULL\n");
705 break;
706 }
707 ehea_fill_skb(dev, skb, cqe, pr);
708 processed_rq2++;
709 } else {
710 /* RQ3 */
711 skb = get_skb_by_index(skb_arr_rq3,
712 skb_arr_rq3_len, cqe);
713 if (unlikely(!skb)) {
714 netif_err(port, rx_err, dev,
715 "rq3: skb=NULL\n");
716 break;
717 }
718 ehea_fill_skb(dev, skb, cqe, pr);
719 processed_rq3++;
720 }
721
722 processed_bytes += skb->len;
723
724 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
725 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
726 cqe->vlan_tag);
727
728 napi_gro_receive(&pr->napi, skb);
729 } else {
730 pr->p_stats.poll_receive_errors++;
731 port_reset = ehea_treat_poll_error(pr, rq, cqe,
732 &processed_rq2,
733 &processed_rq3);
734 if (port_reset)
735 break;
736 }
737 cqe = ehea_poll_rq1(qp, &wqe_index);
738 }
739
740 pr->rx_packets += processed;
741 pr->rx_bytes += processed_bytes;
742
743 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
744 ehea_refill_rq2(pr, processed_rq2);
745 ehea_refill_rq3(pr, processed_rq3);
746
747 return processed;
748 }
749
750 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
751
752 static void reset_sq_restart_flag(struct ehea_port *port)
753 {
754 int i;
755
756 for (i = 0; i < port->num_def_qps; i++) {
757 struct ehea_port_res *pr = &port->port_res[i];
758 pr->sq_restart_flag = 0;
759 }
760 wake_up(&port->restart_wq);
761 }
762
763 static void check_sqs(struct ehea_port *port)
764 {
765 struct ehea_swqe *swqe;
766 int swqe_index;
767 int i;
768
769 for (i = 0; i < port->num_def_qps; i++) {
770 struct ehea_port_res *pr = &port->port_res[i];
771 int ret;
772 swqe = ehea_get_swqe(pr->qp, &swqe_index);
773 memset(swqe, 0, SWQE_HEADER_SIZE);
774 atomic_dec(&pr->swqe_avail);
775
776 swqe->tx_control |= EHEA_SWQE_PURGE;
777 swqe->wr_id = SWQE_RESTART_CHECK;
778 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
779 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
780 swqe->immediate_data_length = 80;
781
782 ehea_post_swqe(pr->qp, swqe);
783
784 ret = wait_event_timeout(port->restart_wq,
785 pr->sq_restart_flag == 0,
786 msecs_to_jiffies(100));
787
788 if (!ret) {
789 pr_err("HW/SW queues out of sync\n");
790 ehea_schedule_port_reset(pr->port);
791 return;
792 }
793 }
794 }
795
796
797 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
798 {
799 struct sk_buff *skb;
800 struct ehea_cq *send_cq = pr->send_cq;
801 struct ehea_cqe *cqe;
802 int quota = my_quota;
803 int cqe_counter = 0;
804 int swqe_av = 0;
805 int index;
806 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
807 pr - &pr->port->port_res[0]);
808
809 cqe = ehea_poll_cq(send_cq);
810 while (cqe && (quota > 0)) {
811 ehea_inc_cq(send_cq);
812
813 cqe_counter++;
814 rmb();
815
816 if (cqe->wr_id == SWQE_RESTART_CHECK) {
817 pr->sq_restart_flag = 1;
818 swqe_av++;
819 break;
820 }
821
822 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
823 pr_err("Bad send completion status=0x%04X\n",
824 cqe->status);
825
826 if (netif_msg_tx_err(pr->port))
827 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
828
829 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
830 pr_err("Resetting port\n");
831 ehea_schedule_port_reset(pr->port);
832 break;
833 }
834 }
835
836 if (netif_msg_tx_done(pr->port))
837 ehea_dump(cqe, sizeof(*cqe), "CQE");
838
839 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
840 == EHEA_SWQE2_TYPE)) {
841
842 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
843 skb = pr->sq_skba.arr[index];
844 dev_consume_skb_any(skb);
845 pr->sq_skba.arr[index] = NULL;
846 }
847
848 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
849 quota--;
850
851 cqe = ehea_poll_cq(send_cq);
852 }
853
854 ehea_update_feca(send_cq, cqe_counter);
855 atomic_add(swqe_av, &pr->swqe_avail);
856
857 if (unlikely(netif_tx_queue_stopped(txq) &&
858 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
859 __netif_tx_lock(txq, smp_processor_id());
860 if (netif_tx_queue_stopped(txq) &&
861 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
862 netif_tx_wake_queue(txq);
863 __netif_tx_unlock(txq);
864 }
865
866 wake_up(&pr->port->swqe_avail_wq);
867
868 return cqe;
869 }
870
871 #define EHEA_POLL_MAX_CQES 65535
872
873 static int ehea_poll(struct napi_struct *napi, int budget)
874 {
875 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
876 napi);
877 struct net_device *dev = pr->port->netdev;
878 struct ehea_cqe *cqe;
879 struct ehea_cqe *cqe_skb = NULL;
880 int wqe_index;
881 int rx = 0;
882
883 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
884 rx += ehea_proc_rwqes(dev, pr, budget - rx);
885
886 while (rx != budget) {
887 napi_complete(napi);
888 ehea_reset_cq_ep(pr->recv_cq);
889 ehea_reset_cq_ep(pr->send_cq);
890 ehea_reset_cq_n1(pr->recv_cq);
891 ehea_reset_cq_n1(pr->send_cq);
892 rmb();
893 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
894 cqe_skb = ehea_poll_cq(pr->send_cq);
895
896 if (!cqe && !cqe_skb)
897 return rx;
898
899 if (!napi_reschedule(napi))
900 return rx;
901
902 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
903 rx += ehea_proc_rwqes(dev, pr, budget - rx);
904 }
905
906 return rx;
907 }
908
909 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
910 {
911 struct ehea_port_res *pr = param;
912
913 napi_schedule(&pr->napi);
914
915 return IRQ_HANDLED;
916 }
917
918 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
919 {
920 struct ehea_port *port = param;
921 struct ehea_eqe *eqe;
922 struct ehea_qp *qp;
923 u32 qp_token;
924 u64 resource_type, aer, aerr;
925 int reset_port = 0;
926
927 eqe = ehea_poll_eq(port->qp_eq);
928
929 while (eqe) {
930 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
931 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
932 eqe->entry, qp_token);
933
934 qp = port->port_res[qp_token].qp;
935
936 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
937 &aer, &aerr);
938
939 if (resource_type == EHEA_AER_RESTYPE_QP) {
940 if ((aer & EHEA_AER_RESET_MASK) ||
941 (aerr & EHEA_AERR_RESET_MASK))
942 reset_port = 1;
943 } else
944 reset_port = 1; /* Reset in case of CQ or EQ error */
945
946 eqe = ehea_poll_eq(port->qp_eq);
947 }
948
949 if (reset_port) {
950 pr_err("Resetting port\n");
951 ehea_schedule_port_reset(port);
952 }
953
954 return IRQ_HANDLED;
955 }
956
957 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
958 int logical_port)
959 {
960 int i;
961
962 for (i = 0; i < EHEA_MAX_PORTS; i++)
963 if (adapter->port[i])
964 if (adapter->port[i]->logical_port_id == logical_port)
965 return adapter->port[i];
966 return NULL;
967 }
968
969 int ehea_sense_port_attr(struct ehea_port *port)
970 {
971 int ret;
972 u64 hret;
973 struct hcp_ehea_port_cb0 *cb0;
974
975 /* may be called via ehea_neq_tasklet() */
976 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
977 if (!cb0) {
978 pr_err("no mem for cb0\n");
979 ret = -ENOMEM;
980 goto out;
981 }
982
983 hret = ehea_h_query_ehea_port(port->adapter->handle,
984 port->logical_port_id, H_PORT_CB0,
985 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
986 cb0);
987 if (hret != H_SUCCESS) {
988 ret = -EIO;
989 goto out_free;
990 }
991
992 /* MAC address */
993 port->mac_addr = cb0->port_mac_addr << 16;
994
995 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
996 ret = -EADDRNOTAVAIL;
997 goto out_free;
998 }
999
1000 /* Port speed */
1001 switch (cb0->port_speed) {
1002 case H_SPEED_10M_H:
1003 port->port_speed = EHEA_SPEED_10M;
1004 port->full_duplex = 0;
1005 break;
1006 case H_SPEED_10M_F:
1007 port->port_speed = EHEA_SPEED_10M;
1008 port->full_duplex = 1;
1009 break;
1010 case H_SPEED_100M_H:
1011 port->port_speed = EHEA_SPEED_100M;
1012 port->full_duplex = 0;
1013 break;
1014 case H_SPEED_100M_F:
1015 port->port_speed = EHEA_SPEED_100M;
1016 port->full_duplex = 1;
1017 break;
1018 case H_SPEED_1G_F:
1019 port->port_speed = EHEA_SPEED_1G;
1020 port->full_duplex = 1;
1021 break;
1022 case H_SPEED_10G_F:
1023 port->port_speed = EHEA_SPEED_10G;
1024 port->full_duplex = 1;
1025 break;
1026 default:
1027 port->port_speed = 0;
1028 port->full_duplex = 0;
1029 break;
1030 }
1031
1032 port->autoneg = 1;
1033 port->num_mcs = cb0->num_default_qps;
1034
1035 /* Number of default QPs */
1036 if (use_mcs)
1037 port->num_def_qps = cb0->num_default_qps;
1038 else
1039 port->num_def_qps = 1;
1040
1041 if (!port->num_def_qps) {
1042 ret = -EINVAL;
1043 goto out_free;
1044 }
1045
1046 ret = 0;
1047 out_free:
1048 if (ret || netif_msg_probe(port))
1049 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1050 free_page((unsigned long)cb0);
1051 out:
1052 return ret;
1053 }
1054
1055 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1056 {
1057 struct hcp_ehea_port_cb4 *cb4;
1058 u64 hret;
1059 int ret = 0;
1060
1061 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1062 if (!cb4) {
1063 pr_err("no mem for cb4\n");
1064 ret = -ENOMEM;
1065 goto out;
1066 }
1067
1068 cb4->port_speed = port_speed;
1069
1070 netif_carrier_off(port->netdev);
1071
1072 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1073 port->logical_port_id,
1074 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1075 if (hret == H_SUCCESS) {
1076 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1077
1078 hret = ehea_h_query_ehea_port(port->adapter->handle,
1079 port->logical_port_id,
1080 H_PORT_CB4, H_PORT_CB4_SPEED,
1081 cb4);
1082 if (hret == H_SUCCESS) {
1083 switch (cb4->port_speed) {
1084 case H_SPEED_10M_H:
1085 port->port_speed = EHEA_SPEED_10M;
1086 port->full_duplex = 0;
1087 break;
1088 case H_SPEED_10M_F:
1089 port->port_speed = EHEA_SPEED_10M;
1090 port->full_duplex = 1;
1091 break;
1092 case H_SPEED_100M_H:
1093 port->port_speed = EHEA_SPEED_100M;
1094 port->full_duplex = 0;
1095 break;
1096 case H_SPEED_100M_F:
1097 port->port_speed = EHEA_SPEED_100M;
1098 port->full_duplex = 1;
1099 break;
1100 case H_SPEED_1G_F:
1101 port->port_speed = EHEA_SPEED_1G;
1102 port->full_duplex = 1;
1103 break;
1104 case H_SPEED_10G_F:
1105 port->port_speed = EHEA_SPEED_10G;
1106 port->full_duplex = 1;
1107 break;
1108 default:
1109 port->port_speed = 0;
1110 port->full_duplex = 0;
1111 break;
1112 }
1113 } else {
1114 pr_err("Failed sensing port speed\n");
1115 ret = -EIO;
1116 }
1117 } else {
1118 if (hret == H_AUTHORITY) {
1119 pr_info("Hypervisor denied setting port speed\n");
1120 ret = -EPERM;
1121 } else {
1122 ret = -EIO;
1123 pr_err("Failed setting port speed\n");
1124 }
1125 }
1126 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1127 netif_carrier_on(port->netdev);
1128
1129 free_page((unsigned long)cb4);
1130 out:
1131 return ret;
1132 }
1133
1134 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1135 {
1136 int ret;
1137 u8 ec;
1138 u8 portnum;
1139 struct ehea_port *port;
1140 struct net_device *dev;
1141
1142 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1143 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1144 port = ehea_get_port(adapter, portnum);
1145 if (!port) {
1146 netdev_err(NULL, "unknown portnum %x\n", portnum);
1147 return;
1148 }
1149 dev = port->netdev;
1150
1151 switch (ec) {
1152 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1153
1154 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1155 if (!netif_carrier_ok(dev)) {
1156 ret = ehea_sense_port_attr(port);
1157 if (ret) {
1158 netdev_err(dev, "failed resensing port attributes\n");
1159 break;
1160 }
1161
1162 netif_info(port, link, dev,
1163 "Logical port up: %dMbps %s Duplex\n",
1164 port->port_speed,
1165 port->full_duplex == 1 ?
1166 "Full" : "Half");
1167
1168 netif_carrier_on(dev);
1169 netif_wake_queue(dev);
1170 }
1171 } else
1172 if (netif_carrier_ok(dev)) {
1173 netif_info(port, link, dev,
1174 "Logical port down\n");
1175 netif_carrier_off(dev);
1176 netif_tx_disable(dev);
1177 }
1178
1179 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1180 port->phy_link = EHEA_PHY_LINK_UP;
1181 netif_info(port, link, dev,
1182 "Physical port up\n");
1183 if (prop_carrier_state)
1184 netif_carrier_on(dev);
1185 } else {
1186 port->phy_link = EHEA_PHY_LINK_DOWN;
1187 netif_info(port, link, dev,
1188 "Physical port down\n");
1189 if (prop_carrier_state)
1190 netif_carrier_off(dev);
1191 }
1192
1193 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1194 netdev_info(dev,
1195 "External switch port is primary port\n");
1196 else
1197 netdev_info(dev,
1198 "External switch port is backup port\n");
1199
1200 break;
1201 case EHEA_EC_ADAPTER_MALFUNC:
1202 netdev_err(dev, "Adapter malfunction\n");
1203 break;
1204 case EHEA_EC_PORT_MALFUNC:
1205 netdev_info(dev, "Port malfunction\n");
1206 netif_carrier_off(dev);
1207 netif_tx_disable(dev);
1208 break;
1209 default:
1210 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1211 break;
1212 }
1213 }
1214
1215 static void ehea_neq_tasklet(unsigned long data)
1216 {
1217 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1218 struct ehea_eqe *eqe;
1219 u64 event_mask;
1220
1221 eqe = ehea_poll_eq(adapter->neq);
1222 pr_debug("eqe=%p\n", eqe);
1223
1224 while (eqe) {
1225 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1226 ehea_parse_eqe(adapter, eqe->entry);
1227 eqe = ehea_poll_eq(adapter->neq);
1228 pr_debug("next eqe=%p\n", eqe);
1229 }
1230
1231 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1232 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1233 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1234
1235 ehea_h_reset_events(adapter->handle,
1236 adapter->neq->fw_handle, event_mask);
1237 }
1238
1239 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1240 {
1241 struct ehea_adapter *adapter = param;
1242 tasklet_hi_schedule(&adapter->neq_tasklet);
1243 return IRQ_HANDLED;
1244 }
1245
1246
1247 static int ehea_fill_port_res(struct ehea_port_res *pr)
1248 {
1249 int ret;
1250 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1251
1252 ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1253
1254 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1255
1256 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1257
1258 return ret;
1259 }
1260
1261 static int ehea_reg_interrupts(struct net_device *dev)
1262 {
1263 struct ehea_port *port = netdev_priv(dev);
1264 struct ehea_port_res *pr;
1265 int i, ret;
1266
1267
1268 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1269 dev->name);
1270
1271 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1272 ehea_qp_aff_irq_handler,
1273 0, port->int_aff_name, port);
1274 if (ret) {
1275 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1276 port->qp_eq->attr.ist1);
1277 goto out_free_qpeq;
1278 }
1279
1280 netif_info(port, ifup, dev,
1281 "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1282 port->qp_eq->attr.ist1);
1283
1284
1285 for (i = 0; i < port->num_def_qps; i++) {
1286 pr = &port->port_res[i];
1287 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1288 "%s-queue%d", dev->name, i);
1289 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1290 ehea_recv_irq_handler,
1291 0, pr->int_send_name, pr);
1292 if (ret) {
1293 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1294 i, pr->eq->attr.ist1);
1295 goto out_free_req;
1296 }
1297 netif_info(port, ifup, dev,
1298 "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1299 pr->eq->attr.ist1, i);
1300 }
1301 out:
1302 return ret;
1303
1304
1305 out_free_req:
1306 while (--i >= 0) {
1307 u32 ist = port->port_res[i].eq->attr.ist1;
1308 ibmebus_free_irq(ist, &port->port_res[i]);
1309 }
1310
1311 out_free_qpeq:
1312 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1313 i = port->num_def_qps;
1314
1315 goto out;
1316
1317 }
1318
1319 static void ehea_free_interrupts(struct net_device *dev)
1320 {
1321 struct ehea_port *port = netdev_priv(dev);
1322 struct ehea_port_res *pr;
1323 int i;
1324
1325 /* send */
1326
1327 for (i = 0; i < port->num_def_qps; i++) {
1328 pr = &port->port_res[i];
1329 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1330 netif_info(port, intr, dev,
1331 "free send irq for res %d with handle 0x%X\n",
1332 i, pr->eq->attr.ist1);
1333 }
1334
1335 /* associated events */
1336 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1337 netif_info(port, intr, dev,
1338 "associated event interrupt for handle 0x%X freed\n",
1339 port->qp_eq->attr.ist1);
1340 }
1341
1342 static int ehea_configure_port(struct ehea_port *port)
1343 {
1344 int ret, i;
1345 u64 hret, mask;
1346 struct hcp_ehea_port_cb0 *cb0;
1347
1348 ret = -ENOMEM;
1349 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1350 if (!cb0)
1351 goto out;
1352
1353 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1354 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1355 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1356 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1357 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1358 PXLY_RC_VLAN_FILTER)
1359 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1360
1361 for (i = 0; i < port->num_mcs; i++)
1362 if (use_mcs)
1363 cb0->default_qpn_arr[i] =
1364 port->port_res[i].qp->init_attr.qp_nr;
1365 else
1366 cb0->default_qpn_arr[i] =
1367 port->port_res[0].qp->init_attr.qp_nr;
1368
1369 if (netif_msg_ifup(port))
1370 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1371
1372 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1373 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1374
1375 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1376 port->logical_port_id,
1377 H_PORT_CB0, mask, cb0);
1378 ret = -EIO;
1379 if (hret != H_SUCCESS)
1380 goto out_free;
1381
1382 ret = 0;
1383
1384 out_free:
1385 free_page((unsigned long)cb0);
1386 out:
1387 return ret;
1388 }
1389
1390 static int ehea_gen_smrs(struct ehea_port_res *pr)
1391 {
1392 int ret;
1393 struct ehea_adapter *adapter = pr->port->adapter;
1394
1395 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1396 if (ret)
1397 goto out;
1398
1399 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1400 if (ret)
1401 goto out_free;
1402
1403 return 0;
1404
1405 out_free:
1406 ehea_rem_mr(&pr->send_mr);
1407 out:
1408 pr_err("Generating SMRS failed\n");
1409 return -EIO;
1410 }
1411
1412 static int ehea_rem_smrs(struct ehea_port_res *pr)
1413 {
1414 if ((ehea_rem_mr(&pr->send_mr)) ||
1415 (ehea_rem_mr(&pr->recv_mr)))
1416 return -EIO;
1417 else
1418 return 0;
1419 }
1420
1421 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1422 {
1423 int arr_size = sizeof(void *) * max_q_entries;
1424
1425 q_skba->arr = vzalloc(arr_size);
1426 if (!q_skba->arr)
1427 return -ENOMEM;
1428
1429 q_skba->len = max_q_entries;
1430 q_skba->index = 0;
1431 q_skba->os_skbs = 0;
1432
1433 return 0;
1434 }
1435
1436 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1437 struct port_res_cfg *pr_cfg, int queue_token)
1438 {
1439 struct ehea_adapter *adapter = port->adapter;
1440 enum ehea_eq_type eq_type = EHEA_EQ;
1441 struct ehea_qp_init_attr *init_attr = NULL;
1442 int ret = -EIO;
1443 u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1444
1445 tx_bytes = pr->tx_bytes;
1446 tx_packets = pr->tx_packets;
1447 rx_bytes = pr->rx_bytes;
1448 rx_packets = pr->rx_packets;
1449
1450 memset(pr, 0, sizeof(struct ehea_port_res));
1451
1452 pr->tx_bytes = tx_bytes;
1453 pr->tx_packets = tx_packets;
1454 pr->rx_bytes = rx_bytes;
1455 pr->rx_packets = rx_packets;
1456
1457 pr->port = port;
1458
1459 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1460 if (!pr->eq) {
1461 pr_err("create_eq failed (eq)\n");
1462 goto out_free;
1463 }
1464
1465 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1466 pr->eq->fw_handle,
1467 port->logical_port_id);
1468 if (!pr->recv_cq) {
1469 pr_err("create_cq failed (cq_recv)\n");
1470 goto out_free;
1471 }
1472
1473 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1474 pr->eq->fw_handle,
1475 port->logical_port_id);
1476 if (!pr->send_cq) {
1477 pr_err("create_cq failed (cq_send)\n");
1478 goto out_free;
1479 }
1480
1481 if (netif_msg_ifup(port))
1482 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1483 pr->send_cq->attr.act_nr_of_cqes,
1484 pr->recv_cq->attr.act_nr_of_cqes);
1485
1486 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1487 if (!init_attr) {
1488 ret = -ENOMEM;
1489 pr_err("no mem for ehea_qp_init_attr\n");
1490 goto out_free;
1491 }
1492
1493 init_attr->low_lat_rq1 = 1;
1494 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1495 init_attr->rq_count = 3;
1496 init_attr->qp_token = queue_token;
1497 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1498 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1499 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1500 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1501 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1502 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1503 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1504 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1505 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1506 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1507 init_attr->port_nr = port->logical_port_id;
1508 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1509 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1510 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1511
1512 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1513 if (!pr->qp) {
1514 pr_err("create_qp failed\n");
1515 ret = -EIO;
1516 goto out_free;
1517 }
1518
1519 if (netif_msg_ifup(port))
1520 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1521 init_attr->qp_nr,
1522 init_attr->act_nr_send_wqes,
1523 init_attr->act_nr_rwqes_rq1,
1524 init_attr->act_nr_rwqes_rq2,
1525 init_attr->act_nr_rwqes_rq3);
1526
1527 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1528
1529 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1530 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1531 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1532 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1533 if (ret)
1534 goto out_free;
1535
1536 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1537 if (ehea_gen_smrs(pr) != 0) {
1538 ret = -EIO;
1539 goto out_free;
1540 }
1541
1542 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1543
1544 kfree(init_attr);
1545
1546 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1547
1548 ret = 0;
1549 goto out;
1550
1551 out_free:
1552 kfree(init_attr);
1553 vfree(pr->sq_skba.arr);
1554 vfree(pr->rq1_skba.arr);
1555 vfree(pr->rq2_skba.arr);
1556 vfree(pr->rq3_skba.arr);
1557 ehea_destroy_qp(pr->qp);
1558 ehea_destroy_cq(pr->send_cq);
1559 ehea_destroy_cq(pr->recv_cq);
1560 ehea_destroy_eq(pr->eq);
1561 out:
1562 return ret;
1563 }
1564
1565 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1566 {
1567 int ret, i;
1568
1569 if (pr->qp)
1570 netif_napi_del(&pr->napi);
1571
1572 ret = ehea_destroy_qp(pr->qp);
1573
1574 if (!ret) {
1575 ehea_destroy_cq(pr->send_cq);
1576 ehea_destroy_cq(pr->recv_cq);
1577 ehea_destroy_eq(pr->eq);
1578
1579 for (i = 0; i < pr->rq1_skba.len; i++)
1580 if (pr->rq1_skba.arr[i])
1581 dev_kfree_skb(pr->rq1_skba.arr[i]);
1582
1583 for (i = 0; i < pr->rq2_skba.len; i++)
1584 if (pr->rq2_skba.arr[i])
1585 dev_kfree_skb(pr->rq2_skba.arr[i]);
1586
1587 for (i = 0; i < pr->rq3_skba.len; i++)
1588 if (pr->rq3_skba.arr[i])
1589 dev_kfree_skb(pr->rq3_skba.arr[i]);
1590
1591 for (i = 0; i < pr->sq_skba.len; i++)
1592 if (pr->sq_skba.arr[i])
1593 dev_kfree_skb(pr->sq_skba.arr[i]);
1594
1595 vfree(pr->rq1_skba.arr);
1596 vfree(pr->rq2_skba.arr);
1597 vfree(pr->rq3_skba.arr);
1598 vfree(pr->sq_skba.arr);
1599 ret = ehea_rem_smrs(pr);
1600 }
1601 return ret;
1602 }
1603
1604 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1605 u32 lkey)
1606 {
1607 int skb_data_size = skb_headlen(skb);
1608 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1609 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1610 unsigned int immediate_len = SWQE2_MAX_IMM;
1611
1612 swqe->descriptors = 0;
1613
1614 if (skb_is_gso(skb)) {
1615 swqe->tx_control |= EHEA_SWQE_TSO;
1616 swqe->mss = skb_shinfo(skb)->gso_size;
1617 /*
1618 * For TSO packets we only copy the headers into the
1619 * immediate area.
1620 */
1621 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1622 }
1623
1624 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1625 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1626 swqe->immediate_data_length = immediate_len;
1627
1628 if (skb_data_size > immediate_len) {
1629 sg1entry->l_key = lkey;
1630 sg1entry->len = skb_data_size - immediate_len;
1631 sg1entry->vaddr =
1632 ehea_map_vaddr(skb->data + immediate_len);
1633 swqe->descriptors++;
1634 }
1635 } else {
1636 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1637 swqe->immediate_data_length = skb_data_size;
1638 }
1639 }
1640
1641 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1642 struct ehea_swqe *swqe, u32 lkey)
1643 {
1644 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1645 skb_frag_t *frag;
1646 int nfrags, sg1entry_contains_frag_data, i;
1647
1648 nfrags = skb_shinfo(skb)->nr_frags;
1649 sg1entry = &swqe->u.immdata_desc.sg_entry;
1650 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1651 sg1entry_contains_frag_data = 0;
1652
1653 write_swqe2_immediate(skb, swqe, lkey);
1654
1655 /* write descriptors */
1656 if (nfrags > 0) {
1657 if (swqe->descriptors == 0) {
1658 /* sg1entry not yet used */
1659 frag = &skb_shinfo(skb)->frags[0];
1660
1661 /* copy sg1entry data */
1662 sg1entry->l_key = lkey;
1663 sg1entry->len = skb_frag_size(frag);
1664 sg1entry->vaddr =
1665 ehea_map_vaddr(skb_frag_address(frag));
1666 swqe->descriptors++;
1667 sg1entry_contains_frag_data = 1;
1668 }
1669
1670 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1671
1672 frag = &skb_shinfo(skb)->frags[i];
1673 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1674
1675 sgentry->l_key = lkey;
1676 sgentry->len = skb_frag_size(frag);
1677 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1678 swqe->descriptors++;
1679 }
1680 }
1681 }
1682
1683 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1684 {
1685 int ret = 0;
1686 u64 hret;
1687 u8 reg_type;
1688
1689 /* De/Register untagged packets */
1690 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1691 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1692 port->logical_port_id,
1693 reg_type, port->mac_addr, 0, hcallid);
1694 if (hret != H_SUCCESS) {
1695 pr_err("%sregistering bc address failed (tagged)\n",
1696 hcallid == H_REG_BCMC ? "" : "de");
1697 ret = -EIO;
1698 goto out_herr;
1699 }
1700
1701 /* De/Register VLAN packets */
1702 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1703 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1704 port->logical_port_id,
1705 reg_type, port->mac_addr, 0, hcallid);
1706 if (hret != H_SUCCESS) {
1707 pr_err("%sregistering bc address failed (vlan)\n",
1708 hcallid == H_REG_BCMC ? "" : "de");
1709 ret = -EIO;
1710 }
1711 out_herr:
1712 return ret;
1713 }
1714
1715 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1716 {
1717 struct ehea_port *port = netdev_priv(dev);
1718 struct sockaddr *mac_addr = sa;
1719 struct hcp_ehea_port_cb0 *cb0;
1720 int ret;
1721 u64 hret;
1722
1723 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1724 ret = -EADDRNOTAVAIL;
1725 goto out;
1726 }
1727
1728 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1729 if (!cb0) {
1730 pr_err("no mem for cb0\n");
1731 ret = -ENOMEM;
1732 goto out;
1733 }
1734
1735 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1736
1737 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1738
1739 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1740 port->logical_port_id, H_PORT_CB0,
1741 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1742 if (hret != H_SUCCESS) {
1743 ret = -EIO;
1744 goto out_free;
1745 }
1746
1747 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1748
1749 /* Deregister old MAC in pHYP */
1750 if (port->state == EHEA_PORT_UP) {
1751 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1752 if (ret)
1753 goto out_upregs;
1754 }
1755
1756 port->mac_addr = cb0->port_mac_addr << 16;
1757
1758 /* Register new MAC in pHYP */
1759 if (port->state == EHEA_PORT_UP) {
1760 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1761 if (ret)
1762 goto out_upregs;
1763 }
1764
1765 ret = 0;
1766
1767 out_upregs:
1768 ehea_update_bcmc_registrations();
1769 out_free:
1770 free_page((unsigned long)cb0);
1771 out:
1772 return ret;
1773 }
1774
1775 static void ehea_promiscuous_error(u64 hret, int enable)
1776 {
1777 if (hret == H_AUTHORITY)
1778 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1779 enable == 1 ? "en" : "dis");
1780 else
1781 pr_err("failed %sabling promiscuous mode\n",
1782 enable == 1 ? "en" : "dis");
1783 }
1784
1785 static void ehea_promiscuous(struct net_device *dev, int enable)
1786 {
1787 struct ehea_port *port = netdev_priv(dev);
1788 struct hcp_ehea_port_cb7 *cb7;
1789 u64 hret;
1790
1791 if (enable == port->promisc)
1792 return;
1793
1794 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1795 if (!cb7) {
1796 pr_err("no mem for cb7\n");
1797 goto out;
1798 }
1799
1800 /* Modify Pxs_DUCQPN in CB7 */
1801 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1802
1803 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1804 port->logical_port_id,
1805 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1806 if (hret) {
1807 ehea_promiscuous_error(hret, enable);
1808 goto out;
1809 }
1810
1811 port->promisc = enable;
1812 out:
1813 free_page((unsigned long)cb7);
1814 }
1815
1816 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1817 u32 hcallid)
1818 {
1819 u64 hret;
1820 u8 reg_type;
1821
1822 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1823 if (mc_mac_addr == 0)
1824 reg_type |= EHEA_BCMC_SCOPE_ALL;
1825
1826 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1827 port->logical_port_id,
1828 reg_type, mc_mac_addr, 0, hcallid);
1829 if (hret)
1830 goto out;
1831
1832 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1833 if (mc_mac_addr == 0)
1834 reg_type |= EHEA_BCMC_SCOPE_ALL;
1835
1836 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1837 port->logical_port_id,
1838 reg_type, mc_mac_addr, 0, hcallid);
1839 out:
1840 return hret;
1841 }
1842
1843 static int ehea_drop_multicast_list(struct net_device *dev)
1844 {
1845 struct ehea_port *port = netdev_priv(dev);
1846 struct ehea_mc_list *mc_entry = port->mc_list;
1847 struct list_head *pos;
1848 struct list_head *temp;
1849 int ret = 0;
1850 u64 hret;
1851
1852 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1853 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1854
1855 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1856 H_DEREG_BCMC);
1857 if (hret) {
1858 pr_err("failed deregistering mcast MAC\n");
1859 ret = -EIO;
1860 }
1861
1862 list_del(pos);
1863 kfree(mc_entry);
1864 }
1865 return ret;
1866 }
1867
1868 static void ehea_allmulti(struct net_device *dev, int enable)
1869 {
1870 struct ehea_port *port = netdev_priv(dev);
1871 u64 hret;
1872
1873 if (!port->allmulti) {
1874 if (enable) {
1875 /* Enable ALLMULTI */
1876 ehea_drop_multicast_list(dev);
1877 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1878 if (!hret)
1879 port->allmulti = 1;
1880 else
1881 netdev_err(dev,
1882 "failed enabling IFF_ALLMULTI\n");
1883 }
1884 } else {
1885 if (!enable) {
1886 /* Disable ALLMULTI */
1887 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1888 if (!hret)
1889 port->allmulti = 0;
1890 else
1891 netdev_err(dev,
1892 "failed disabling IFF_ALLMULTI\n");
1893 }
1894 }
1895 }
1896
1897 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1898 {
1899 struct ehea_mc_list *ehea_mcl_entry;
1900 u64 hret;
1901
1902 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1903 if (!ehea_mcl_entry)
1904 return;
1905
1906 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1907
1908 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1909
1910 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1911 H_REG_BCMC);
1912 if (!hret)
1913 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1914 else {
1915 pr_err("failed registering mcast MAC\n");
1916 kfree(ehea_mcl_entry);
1917 }
1918 }
1919
1920 static void ehea_set_multicast_list(struct net_device *dev)
1921 {
1922 struct ehea_port *port = netdev_priv(dev);
1923 struct netdev_hw_addr *ha;
1924 int ret;
1925
1926 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1927
1928 if (dev->flags & IFF_ALLMULTI) {
1929 ehea_allmulti(dev, 1);
1930 goto out;
1931 }
1932 ehea_allmulti(dev, 0);
1933
1934 if (!netdev_mc_empty(dev)) {
1935 ret = ehea_drop_multicast_list(dev);
1936 if (ret) {
1937 /* Dropping the current multicast list failed.
1938 * Enabling ALL_MULTI is the best we can do.
1939 */
1940 ehea_allmulti(dev, 1);
1941 }
1942
1943 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1944 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1945 port->adapter->max_mc_mac);
1946 goto out;
1947 }
1948
1949 netdev_for_each_mc_addr(ha, dev)
1950 ehea_add_multicast_entry(port, ha->addr);
1951
1952 }
1953 out:
1954 ehea_update_bcmc_registrations();
1955 }
1956
1957 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1958 {
1959 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1960
1961 if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1962 return;
1963
1964 if (skb->ip_summed == CHECKSUM_PARTIAL)
1965 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1966
1967 swqe->ip_start = skb_network_offset(skb);
1968 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1969
1970 switch (ip_hdr(skb)->protocol) {
1971 case IPPROTO_UDP:
1972 if (skb->ip_summed == CHECKSUM_PARTIAL)
1973 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1974
1975 swqe->tcp_offset = swqe->ip_end + 1 +
1976 offsetof(struct udphdr, check);
1977 break;
1978
1979 case IPPROTO_TCP:
1980 if (skb->ip_summed == CHECKSUM_PARTIAL)
1981 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1982
1983 swqe->tcp_offset = swqe->ip_end + 1 +
1984 offsetof(struct tcphdr, check);
1985 break;
1986 }
1987 }
1988
1989 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1990 struct ehea_swqe *swqe, u32 lkey)
1991 {
1992 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
1993
1994 xmit_common(skb, swqe);
1995
1996 write_swqe2_data(skb, dev, swqe, lkey);
1997 }
1998
1999 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2000 struct ehea_swqe *swqe)
2001 {
2002 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2003
2004 xmit_common(skb, swqe);
2005
2006 if (!skb->data_len)
2007 skb_copy_from_linear_data(skb, imm_data, skb->len);
2008 else
2009 skb_copy_bits(skb, 0, imm_data, skb->len);
2010
2011 swqe->immediate_data_length = skb->len;
2012 dev_consume_skb_any(skb);
2013 }
2014
2015 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2016 {
2017 struct ehea_port *port = netdev_priv(dev);
2018 struct ehea_swqe *swqe;
2019 u32 lkey;
2020 int swqe_index;
2021 struct ehea_port_res *pr;
2022 struct netdev_queue *txq;
2023
2024 pr = &port->port_res[skb_get_queue_mapping(skb)];
2025 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2026
2027 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2028 memset(swqe, 0, SWQE_HEADER_SIZE);
2029 atomic_dec(&pr->swqe_avail);
2030
2031 if (skb_vlan_tag_present(skb)) {
2032 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2033 swqe->vlan_tag = skb_vlan_tag_get(skb);
2034 }
2035
2036 pr->tx_packets++;
2037 pr->tx_bytes += skb->len;
2038
2039 if (skb->len <= SWQE3_MAX_IMM) {
2040 u32 sig_iv = port->sig_comp_iv;
2041 u32 swqe_num = pr->swqe_id_counter;
2042 ehea_xmit3(skb, dev, swqe);
2043 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2044 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2045 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2046 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2047 sig_iv);
2048 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2049 pr->swqe_ll_count = 0;
2050 } else
2051 pr->swqe_ll_count += 1;
2052 } else {
2053 swqe->wr_id =
2054 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2055 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2056 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2057 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2058 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2059
2060 pr->sq_skba.index++;
2061 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2062
2063 lkey = pr->send_mr.lkey;
2064 ehea_xmit2(skb, dev, swqe, lkey);
2065 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2066 }
2067 pr->swqe_id_counter += 1;
2068
2069 netif_info(port, tx_queued, dev,
2070 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2071 if (netif_msg_tx_queued(port))
2072 ehea_dump(swqe, 512, "swqe");
2073
2074 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2075 netif_tx_stop_queue(txq);
2076 swqe->tx_control |= EHEA_SWQE_PURGE;
2077 }
2078
2079 ehea_post_swqe(pr->qp, swqe);
2080
2081 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2082 pr->p_stats.queue_stopped++;
2083 netif_tx_stop_queue(txq);
2084 }
2085
2086 return NETDEV_TX_OK;
2087 }
2088
2089 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2090 {
2091 struct ehea_port *port = netdev_priv(dev);
2092 struct ehea_adapter *adapter = port->adapter;
2093 struct hcp_ehea_port_cb1 *cb1;
2094 int index;
2095 u64 hret;
2096 int err = 0;
2097
2098 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2099 if (!cb1) {
2100 pr_err("no mem for cb1\n");
2101 err = -ENOMEM;
2102 goto out;
2103 }
2104
2105 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2106 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2107 if (hret != H_SUCCESS) {
2108 pr_err("query_ehea_port failed\n");
2109 err = -EINVAL;
2110 goto out;
2111 }
2112
2113 index = (vid / 64);
2114 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2115
2116 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2117 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2118 if (hret != H_SUCCESS) {
2119 pr_err("modify_ehea_port failed\n");
2120 err = -EINVAL;
2121 }
2122 out:
2123 free_page((unsigned long)cb1);
2124 return err;
2125 }
2126
2127 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2128 {
2129 struct ehea_port *port = netdev_priv(dev);
2130 struct ehea_adapter *adapter = port->adapter;
2131 struct hcp_ehea_port_cb1 *cb1;
2132 int index;
2133 u64 hret;
2134 int err = 0;
2135
2136 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2137 if (!cb1) {
2138 pr_err("no mem for cb1\n");
2139 err = -ENOMEM;
2140 goto out;
2141 }
2142
2143 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2144 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2145 if (hret != H_SUCCESS) {
2146 pr_err("query_ehea_port failed\n");
2147 err = -EINVAL;
2148 goto out;
2149 }
2150
2151 index = (vid / 64);
2152 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2153
2154 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2155 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2156 if (hret != H_SUCCESS) {
2157 pr_err("modify_ehea_port failed\n");
2158 err = -EINVAL;
2159 }
2160 out:
2161 free_page((unsigned long)cb1);
2162 return err;
2163 }
2164
2165 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2166 {
2167 int ret = -EIO;
2168 u64 hret;
2169 u16 dummy16 = 0;
2170 u64 dummy64 = 0;
2171 struct hcp_modify_qp_cb0 *cb0;
2172
2173 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2174 if (!cb0) {
2175 ret = -ENOMEM;
2176 goto out;
2177 }
2178
2179 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2180 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2181 if (hret != H_SUCCESS) {
2182 pr_err("query_ehea_qp failed (1)\n");
2183 goto out;
2184 }
2185
2186 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2187 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2188 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2189 &dummy64, &dummy64, &dummy16, &dummy16);
2190 if (hret != H_SUCCESS) {
2191 pr_err("modify_ehea_qp failed (1)\n");
2192 goto out;
2193 }
2194
2195 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2196 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2197 if (hret != H_SUCCESS) {
2198 pr_err("query_ehea_qp failed (2)\n");
2199 goto out;
2200 }
2201
2202 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2203 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2204 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2205 &dummy64, &dummy64, &dummy16, &dummy16);
2206 if (hret != H_SUCCESS) {
2207 pr_err("modify_ehea_qp failed (2)\n");
2208 goto out;
2209 }
2210
2211 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2212 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2213 if (hret != H_SUCCESS) {
2214 pr_err("query_ehea_qp failed (3)\n");
2215 goto out;
2216 }
2217
2218 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2219 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2220 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2221 &dummy64, &dummy64, &dummy16, &dummy16);
2222 if (hret != H_SUCCESS) {
2223 pr_err("modify_ehea_qp failed (3)\n");
2224 goto out;
2225 }
2226
2227 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2228 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2229 if (hret != H_SUCCESS) {
2230 pr_err("query_ehea_qp failed (4)\n");
2231 goto out;
2232 }
2233
2234 ret = 0;
2235 out:
2236 free_page((unsigned long)cb0);
2237 return ret;
2238 }
2239
2240 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2241 {
2242 int ret, i;
2243 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2244 enum ehea_eq_type eq_type = EHEA_EQ;
2245
2246 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2247 EHEA_MAX_ENTRIES_EQ, 1);
2248 if (!port->qp_eq) {
2249 ret = -EINVAL;
2250 pr_err("ehea_create_eq failed (qp_eq)\n");
2251 goto out_kill_eq;
2252 }
2253
2254 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2255 pr_cfg.max_entries_scq = sq_entries * 2;
2256 pr_cfg.max_entries_sq = sq_entries;
2257 pr_cfg.max_entries_rq1 = rq1_entries;
2258 pr_cfg.max_entries_rq2 = rq2_entries;
2259 pr_cfg.max_entries_rq3 = rq3_entries;
2260
2261 pr_cfg_small_rx.max_entries_rcq = 1;
2262 pr_cfg_small_rx.max_entries_scq = sq_entries;
2263 pr_cfg_small_rx.max_entries_sq = sq_entries;
2264 pr_cfg_small_rx.max_entries_rq1 = 1;
2265 pr_cfg_small_rx.max_entries_rq2 = 1;
2266 pr_cfg_small_rx.max_entries_rq3 = 1;
2267
2268 for (i = 0; i < def_qps; i++) {
2269 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2270 if (ret)
2271 goto out_clean_pr;
2272 }
2273 for (i = def_qps; i < def_qps; i++) {
2274 ret = ehea_init_port_res(port, &port->port_res[i],
2275 &pr_cfg_small_rx, i);
2276 if (ret)
2277 goto out_clean_pr;
2278 }
2279
2280 return 0;
2281
2282 out_clean_pr:
2283 while (--i >= 0)
2284 ehea_clean_portres(port, &port->port_res[i]);
2285
2286 out_kill_eq:
2287 ehea_destroy_eq(port->qp_eq);
2288 return ret;
2289 }
2290
2291 static int ehea_clean_all_portres(struct ehea_port *port)
2292 {
2293 int ret = 0;
2294 int i;
2295
2296 for (i = 0; i < port->num_def_qps; i++)
2297 ret |= ehea_clean_portres(port, &port->port_res[i]);
2298
2299 ret |= ehea_destroy_eq(port->qp_eq);
2300
2301 return ret;
2302 }
2303
2304 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2305 {
2306 if (adapter->active_ports)
2307 return;
2308
2309 ehea_rem_mr(&adapter->mr);
2310 }
2311
2312 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2313 {
2314 if (adapter->active_ports)
2315 return 0;
2316
2317 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2318 }
2319
2320 static int ehea_up(struct net_device *dev)
2321 {
2322 int ret, i;
2323 struct ehea_port *port = netdev_priv(dev);
2324
2325 if (port->state == EHEA_PORT_UP)
2326 return 0;
2327
2328 ret = ehea_port_res_setup(port, port->num_def_qps);
2329 if (ret) {
2330 netdev_err(dev, "port_res_failed\n");
2331 goto out;
2332 }
2333
2334 /* Set default QP for this port */
2335 ret = ehea_configure_port(port);
2336 if (ret) {
2337 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2338 goto out_clean_pr;
2339 }
2340
2341 ret = ehea_reg_interrupts(dev);
2342 if (ret) {
2343 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2344 goto out_clean_pr;
2345 }
2346
2347 for (i = 0; i < port->num_def_qps; i++) {
2348 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2349 if (ret) {
2350 netdev_err(dev, "activate_qp failed\n");
2351 goto out_free_irqs;
2352 }
2353 }
2354
2355 for (i = 0; i < port->num_def_qps; i++) {
2356 ret = ehea_fill_port_res(&port->port_res[i]);
2357 if (ret) {
2358 netdev_err(dev, "out_free_irqs\n");
2359 goto out_free_irqs;
2360 }
2361 }
2362
2363 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2364 if (ret) {
2365 ret = -EIO;
2366 goto out_free_irqs;
2367 }
2368
2369 port->state = EHEA_PORT_UP;
2370
2371 ret = 0;
2372 goto out;
2373
2374 out_free_irqs:
2375 ehea_free_interrupts(dev);
2376
2377 out_clean_pr:
2378 ehea_clean_all_portres(port);
2379 out:
2380 if (ret)
2381 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2382
2383 ehea_update_bcmc_registrations();
2384 ehea_update_firmware_handles();
2385
2386 return ret;
2387 }
2388
2389 static void port_napi_disable(struct ehea_port *port)
2390 {
2391 int i;
2392
2393 for (i = 0; i < port->num_def_qps; i++)
2394 napi_disable(&port->port_res[i].napi);
2395 }
2396
2397 static void port_napi_enable(struct ehea_port *port)
2398 {
2399 int i;
2400
2401 for (i = 0; i < port->num_def_qps; i++)
2402 napi_enable(&port->port_res[i].napi);
2403 }
2404
2405 static int ehea_open(struct net_device *dev)
2406 {
2407 int ret;
2408 struct ehea_port *port = netdev_priv(dev);
2409
2410 mutex_lock(&port->port_lock);
2411
2412 netif_info(port, ifup, dev, "enabling port\n");
2413
2414 netif_carrier_off(dev);
2415
2416 ret = ehea_up(dev);
2417 if (!ret) {
2418 port_napi_enable(port);
2419 netif_tx_start_all_queues(dev);
2420 }
2421
2422 mutex_unlock(&port->port_lock);
2423 schedule_delayed_work(&port->stats_work,
2424 round_jiffies_relative(msecs_to_jiffies(1000)));
2425
2426 return ret;
2427 }
2428
2429 static int ehea_down(struct net_device *dev)
2430 {
2431 int ret;
2432 struct ehea_port *port = netdev_priv(dev);
2433
2434 if (port->state == EHEA_PORT_DOWN)
2435 return 0;
2436
2437 ehea_drop_multicast_list(dev);
2438 ehea_allmulti(dev, 0);
2439 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2440
2441 ehea_free_interrupts(dev);
2442
2443 port->state = EHEA_PORT_DOWN;
2444
2445 ehea_update_bcmc_registrations();
2446
2447 ret = ehea_clean_all_portres(port);
2448 if (ret)
2449 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2450
2451 ehea_update_firmware_handles();
2452
2453 return ret;
2454 }
2455
2456 static int ehea_stop(struct net_device *dev)
2457 {
2458 int ret;
2459 struct ehea_port *port = netdev_priv(dev);
2460
2461 netif_info(port, ifdown, dev, "disabling port\n");
2462
2463 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2464 cancel_work_sync(&port->reset_task);
2465 cancel_delayed_work_sync(&port->stats_work);
2466 mutex_lock(&port->port_lock);
2467 netif_tx_stop_all_queues(dev);
2468 port_napi_disable(port);
2469 ret = ehea_down(dev);
2470 mutex_unlock(&port->port_lock);
2471 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2472 return ret;
2473 }
2474
2475 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2476 {
2477 struct ehea_qp qp = *orig_qp;
2478 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2479 struct ehea_swqe *swqe;
2480 int wqe_index;
2481 int i;
2482
2483 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2484 swqe = ehea_get_swqe(&qp, &wqe_index);
2485 swqe->tx_control |= EHEA_SWQE_PURGE;
2486 }
2487 }
2488
2489 static void ehea_flush_sq(struct ehea_port *port)
2490 {
2491 int i;
2492
2493 for (i = 0; i < port->num_def_qps; i++) {
2494 struct ehea_port_res *pr = &port->port_res[i];
2495 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2496 int ret;
2497
2498 ret = wait_event_timeout(port->swqe_avail_wq,
2499 atomic_read(&pr->swqe_avail) >= swqe_max,
2500 msecs_to_jiffies(100));
2501
2502 if (!ret) {
2503 pr_err("WARNING: sq not flushed completely\n");
2504 break;
2505 }
2506 }
2507 }
2508
2509 static int ehea_stop_qps(struct net_device *dev)
2510 {
2511 struct ehea_port *port = netdev_priv(dev);
2512 struct ehea_adapter *adapter = port->adapter;
2513 struct hcp_modify_qp_cb0 *cb0;
2514 int ret = -EIO;
2515 int dret;
2516 int i;
2517 u64 hret;
2518 u64 dummy64 = 0;
2519 u16 dummy16 = 0;
2520
2521 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2522 if (!cb0) {
2523 ret = -ENOMEM;
2524 goto out;
2525 }
2526
2527 for (i = 0; i < (port->num_def_qps); i++) {
2528 struct ehea_port_res *pr = &port->port_res[i];
2529 struct ehea_qp *qp = pr->qp;
2530
2531 /* Purge send queue */
2532 ehea_purge_sq(qp);
2533
2534 /* Disable queue pair */
2535 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2536 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2537 cb0);
2538 if (hret != H_SUCCESS) {
2539 pr_err("query_ehea_qp failed (1)\n");
2540 goto out;
2541 }
2542
2543 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2544 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2545
2546 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2547 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2548 1), cb0, &dummy64,
2549 &dummy64, &dummy16, &dummy16);
2550 if (hret != H_SUCCESS) {
2551 pr_err("modify_ehea_qp failed (1)\n");
2552 goto out;
2553 }
2554
2555 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2556 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2557 cb0);
2558 if (hret != H_SUCCESS) {
2559 pr_err("query_ehea_qp failed (2)\n");
2560 goto out;
2561 }
2562
2563 /* deregister shared memory regions */
2564 dret = ehea_rem_smrs(pr);
2565 if (dret) {
2566 pr_err("unreg shared memory region failed\n");
2567 goto out;
2568 }
2569 }
2570
2571 ret = 0;
2572 out:
2573 free_page((unsigned long)cb0);
2574
2575 return ret;
2576 }
2577
2578 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2579 {
2580 struct ehea_qp qp = *orig_qp;
2581 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2582 struct ehea_rwqe *rwqe;
2583 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2584 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2585 struct sk_buff *skb;
2586 u32 lkey = pr->recv_mr.lkey;
2587
2588
2589 int i;
2590 int index;
2591
2592 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2593 rwqe = ehea_get_next_rwqe(&qp, 2);
2594 rwqe->sg_list[0].l_key = lkey;
2595 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2596 skb = skba_rq2[index];
2597 if (skb)
2598 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2599 }
2600
2601 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2602 rwqe = ehea_get_next_rwqe(&qp, 3);
2603 rwqe->sg_list[0].l_key = lkey;
2604 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2605 skb = skba_rq3[index];
2606 if (skb)
2607 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2608 }
2609 }
2610
2611 static int ehea_restart_qps(struct net_device *dev)
2612 {
2613 struct ehea_port *port = netdev_priv(dev);
2614 struct ehea_adapter *adapter = port->adapter;
2615 int ret = 0;
2616 int i;
2617
2618 struct hcp_modify_qp_cb0 *cb0;
2619 u64 hret;
2620 u64 dummy64 = 0;
2621 u16 dummy16 = 0;
2622
2623 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2624 if (!cb0) {
2625 ret = -ENOMEM;
2626 goto out;
2627 }
2628
2629 for (i = 0; i < (port->num_def_qps); i++) {
2630 struct ehea_port_res *pr = &port->port_res[i];
2631 struct ehea_qp *qp = pr->qp;
2632
2633 ret = ehea_gen_smrs(pr);
2634 if (ret) {
2635 netdev_err(dev, "creation of shared memory regions failed\n");
2636 goto out;
2637 }
2638
2639 ehea_update_rqs(qp, pr);
2640
2641 /* Enable queue pair */
2642 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2643 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2644 cb0);
2645 if (hret != H_SUCCESS) {
2646 netdev_err(dev, "query_ehea_qp failed (1)\n");
2647 goto out;
2648 }
2649
2650 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2651 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2652
2653 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2654 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2655 1), cb0, &dummy64,
2656 &dummy64, &dummy16, &dummy16);
2657 if (hret != H_SUCCESS) {
2658 netdev_err(dev, "modify_ehea_qp failed (1)\n");
2659 goto out;
2660 }
2661
2662 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2663 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2664 cb0);
2665 if (hret != H_SUCCESS) {
2666 netdev_err(dev, "query_ehea_qp failed (2)\n");
2667 goto out;
2668 }
2669
2670 /* refill entire queue */
2671 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2672 ehea_refill_rq2(pr, 0);
2673 ehea_refill_rq3(pr, 0);
2674 }
2675 out:
2676 free_page((unsigned long)cb0);
2677
2678 return ret;
2679 }
2680
2681 static void ehea_reset_port(struct work_struct *work)
2682 {
2683 int ret;
2684 struct ehea_port *port =
2685 container_of(work, struct ehea_port, reset_task);
2686 struct net_device *dev = port->netdev;
2687
2688 mutex_lock(&dlpar_mem_lock);
2689 port->resets++;
2690 mutex_lock(&port->port_lock);
2691 netif_tx_disable(dev);
2692
2693 port_napi_disable(port);
2694
2695 ehea_down(dev);
2696
2697 ret = ehea_up(dev);
2698 if (ret)
2699 goto out;
2700
2701 ehea_set_multicast_list(dev);
2702
2703 netif_info(port, timer, dev, "reset successful\n");
2704
2705 port_napi_enable(port);
2706
2707 netif_tx_wake_all_queues(dev);
2708 out:
2709 mutex_unlock(&port->port_lock);
2710 mutex_unlock(&dlpar_mem_lock);
2711 }
2712
2713 static void ehea_rereg_mrs(void)
2714 {
2715 int ret, i;
2716 struct ehea_adapter *adapter;
2717
2718 pr_info("LPAR memory changed - re-initializing driver\n");
2719
2720 list_for_each_entry(adapter, &adapter_list, list)
2721 if (adapter->active_ports) {
2722 /* Shutdown all ports */
2723 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2724 struct ehea_port *port = adapter->port[i];
2725 struct net_device *dev;
2726
2727 if (!port)
2728 continue;
2729
2730 dev = port->netdev;
2731
2732 if (dev->flags & IFF_UP) {
2733 mutex_lock(&port->port_lock);
2734 netif_tx_disable(dev);
2735 ehea_flush_sq(port);
2736 ret = ehea_stop_qps(dev);
2737 if (ret) {
2738 mutex_unlock(&port->port_lock);
2739 goto out;
2740 }
2741 port_napi_disable(port);
2742 mutex_unlock(&port->port_lock);
2743 }
2744 reset_sq_restart_flag(port);
2745 }
2746
2747 /* Unregister old memory region */
2748 ret = ehea_rem_mr(&adapter->mr);
2749 if (ret) {
2750 pr_err("unregister MR failed - driver inoperable!\n");
2751 goto out;
2752 }
2753 }
2754
2755 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2756
2757 list_for_each_entry(adapter, &adapter_list, list)
2758 if (adapter->active_ports) {
2759 /* Register new memory region */
2760 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2761 if (ret) {
2762 pr_err("register MR failed - driver inoperable!\n");
2763 goto out;
2764 }
2765
2766 /* Restart all ports */
2767 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2768 struct ehea_port *port = adapter->port[i];
2769
2770 if (port) {
2771 struct net_device *dev = port->netdev;
2772
2773 if (dev->flags & IFF_UP) {
2774 mutex_lock(&port->port_lock);
2775 ret = ehea_restart_qps(dev);
2776 if (!ret) {
2777 check_sqs(port);
2778 port_napi_enable(port);
2779 netif_tx_wake_all_queues(dev);
2780 } else {
2781 netdev_err(dev, "Unable to restart QPS\n");
2782 }
2783 mutex_unlock(&port->port_lock);
2784 }
2785 }
2786 }
2787 }
2788 pr_info("re-initializing driver complete\n");
2789 out:
2790 return;
2791 }
2792
2793 static void ehea_tx_watchdog(struct net_device *dev)
2794 {
2795 struct ehea_port *port = netdev_priv(dev);
2796
2797 if (netif_carrier_ok(dev) &&
2798 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2799 ehea_schedule_port_reset(port);
2800 }
2801
2802 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2803 {
2804 struct hcp_query_ehea *cb;
2805 u64 hret;
2806 int ret;
2807
2808 cb = (void *)get_zeroed_page(GFP_KERNEL);
2809 if (!cb) {
2810 ret = -ENOMEM;
2811 goto out;
2812 }
2813
2814 hret = ehea_h_query_ehea(adapter->handle, cb);
2815
2816 if (hret != H_SUCCESS) {
2817 ret = -EIO;
2818 goto out_herr;
2819 }
2820
2821 adapter->max_mc_mac = cb->max_mc_mac - 1;
2822 ret = 0;
2823
2824 out_herr:
2825 free_page((unsigned long)cb);
2826 out:
2827 return ret;
2828 }
2829
2830 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2831 {
2832 struct hcp_ehea_port_cb4 *cb4;
2833 u64 hret;
2834 int ret = 0;
2835
2836 *jumbo = 0;
2837
2838 /* (Try to) enable *jumbo frames */
2839 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2840 if (!cb4) {
2841 pr_err("no mem for cb4\n");
2842 ret = -ENOMEM;
2843 goto out;
2844 } else {
2845 hret = ehea_h_query_ehea_port(port->adapter->handle,
2846 port->logical_port_id,
2847 H_PORT_CB4,
2848 H_PORT_CB4_JUMBO, cb4);
2849 if (hret == H_SUCCESS) {
2850 if (cb4->jumbo_frame)
2851 *jumbo = 1;
2852 else {
2853 cb4->jumbo_frame = 1;
2854 hret = ehea_h_modify_ehea_port(port->adapter->
2855 handle,
2856 port->
2857 logical_port_id,
2858 H_PORT_CB4,
2859 H_PORT_CB4_JUMBO,
2860 cb4);
2861 if (hret == H_SUCCESS)
2862 *jumbo = 1;
2863 }
2864 } else
2865 ret = -EINVAL;
2866
2867 free_page((unsigned long)cb4);
2868 }
2869 out:
2870 return ret;
2871 }
2872
2873 static ssize_t ehea_show_port_id(struct device *dev,
2874 struct device_attribute *attr, char *buf)
2875 {
2876 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2877 return sprintf(buf, "%d", port->logical_port_id);
2878 }
2879
2880 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2881
2882 static void logical_port_release(struct device *dev)
2883 {
2884 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2885 of_node_put(port->ofdev.dev.of_node);
2886 }
2887
2888 static struct device *ehea_register_port(struct ehea_port *port,
2889 struct device_node *dn)
2890 {
2891 int ret;
2892
2893 port->ofdev.dev.of_node = of_node_get(dn);
2894 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2895 port->ofdev.dev.bus = &ibmebus_bus_type;
2896
2897 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2898 port->ofdev.dev.release = logical_port_release;
2899
2900 ret = of_device_register(&port->ofdev);
2901 if (ret) {
2902 pr_err("failed to register device. ret=%d\n", ret);
2903 goto out;
2904 }
2905
2906 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2907 if (ret) {
2908 pr_err("failed to register attributes, ret=%d\n", ret);
2909 goto out_unreg_of_dev;
2910 }
2911
2912 return &port->ofdev.dev;
2913
2914 out_unreg_of_dev:
2915 of_device_unregister(&port->ofdev);
2916 out:
2917 return NULL;
2918 }
2919
2920 static void ehea_unregister_port(struct ehea_port *port)
2921 {
2922 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2923 of_device_unregister(&port->ofdev);
2924 }
2925
2926 static const struct net_device_ops ehea_netdev_ops = {
2927 .ndo_open = ehea_open,
2928 .ndo_stop = ehea_stop,
2929 .ndo_start_xmit = ehea_start_xmit,
2930 .ndo_get_stats64 = ehea_get_stats64,
2931 .ndo_set_mac_address = ehea_set_mac_addr,
2932 .ndo_validate_addr = eth_validate_addr,
2933 .ndo_set_rx_mode = ehea_set_multicast_list,
2934 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
2935 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
2936 .ndo_tx_timeout = ehea_tx_watchdog,
2937 };
2938
2939 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2940 u32 logical_port_id,
2941 struct device_node *dn)
2942 {
2943 int ret;
2944 struct net_device *dev;
2945 struct ehea_port *port;
2946 struct device *port_dev;
2947 int jumbo;
2948
2949 /* allocate memory for the port structures */
2950 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2951
2952 if (!dev) {
2953 ret = -ENOMEM;
2954 goto out_err;
2955 }
2956
2957 port = netdev_priv(dev);
2958
2959 mutex_init(&port->port_lock);
2960 port->state = EHEA_PORT_DOWN;
2961 port->sig_comp_iv = sq_entries / 10;
2962
2963 port->adapter = adapter;
2964 port->netdev = dev;
2965 port->logical_port_id = logical_port_id;
2966
2967 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2968
2969 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2970 if (!port->mc_list) {
2971 ret = -ENOMEM;
2972 goto out_free_ethdev;
2973 }
2974
2975 INIT_LIST_HEAD(&port->mc_list->list);
2976
2977 ret = ehea_sense_port_attr(port);
2978 if (ret)
2979 goto out_free_mc_list;
2980
2981 netif_set_real_num_rx_queues(dev, port->num_def_qps);
2982 netif_set_real_num_tx_queues(dev, port->num_def_qps);
2983
2984 port_dev = ehea_register_port(port, dn);
2985 if (!port_dev)
2986 goto out_free_mc_list;
2987
2988 SET_NETDEV_DEV(dev, port_dev);
2989
2990 /* initialize net_device structure */
2991 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2992
2993 dev->netdev_ops = &ehea_netdev_ops;
2994 ehea_set_ethtool_ops(dev);
2995
2996 dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
2997 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
2998 dev->features = NETIF_F_SG | NETIF_F_TSO |
2999 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3000 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3001 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3002 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3003 NETIF_F_IP_CSUM;
3004 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3005
3006 /* MTU range: 68 - 9022 */
3007 dev->min_mtu = ETH_MIN_MTU;
3008 dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3009
3010 INIT_WORK(&port->reset_task, ehea_reset_port);
3011 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3012
3013 init_waitqueue_head(&port->swqe_avail_wq);
3014 init_waitqueue_head(&port->restart_wq);
3015
3016 ret = register_netdev(dev);
3017 if (ret) {
3018 pr_err("register_netdev failed. ret=%d\n", ret);
3019 goto out_unreg_port;
3020 }
3021
3022 ret = ehea_get_jumboframe_status(port, &jumbo);
3023 if (ret)
3024 netdev_err(dev, "failed determining jumbo frame status\n");
3025
3026 netdev_info(dev, "Jumbo frames are %sabled\n",
3027 jumbo == 1 ? "en" : "dis");
3028
3029 adapter->active_ports++;
3030
3031 return port;
3032
3033 out_unreg_port:
3034 ehea_unregister_port(port);
3035
3036 out_free_mc_list:
3037 kfree(port->mc_list);
3038
3039 out_free_ethdev:
3040 free_netdev(dev);
3041
3042 out_err:
3043 pr_err("setting up logical port with id=%d failed, ret=%d\n",
3044 logical_port_id, ret);
3045 return NULL;
3046 }
3047
3048 static void ehea_shutdown_single_port(struct ehea_port *port)
3049 {
3050 struct ehea_adapter *adapter = port->adapter;
3051
3052 cancel_work_sync(&port->reset_task);
3053 cancel_delayed_work_sync(&port->stats_work);
3054 unregister_netdev(port->netdev);
3055 ehea_unregister_port(port);
3056 kfree(port->mc_list);
3057 free_netdev(port->netdev);
3058 adapter->active_ports--;
3059 }
3060
3061 static int ehea_setup_ports(struct ehea_adapter *adapter)
3062 {
3063 struct device_node *lhea_dn;
3064 struct device_node *eth_dn = NULL;
3065
3066 const u32 *dn_log_port_id;
3067 int i = 0;
3068
3069 lhea_dn = adapter->ofdev->dev.of_node;
3070 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3071
3072 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3073 NULL);
3074 if (!dn_log_port_id) {
3075 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3076 continue;
3077 }
3078
3079 if (ehea_add_adapter_mr(adapter)) {
3080 pr_err("creating MR failed\n");
3081 of_node_put(eth_dn);
3082 return -EIO;
3083 }
3084
3085 adapter->port[i] = ehea_setup_single_port(adapter,
3086 *dn_log_port_id,
3087 eth_dn);
3088 if (adapter->port[i])
3089 netdev_info(adapter->port[i]->netdev,
3090 "logical port id #%d\n", *dn_log_port_id);
3091 else
3092 ehea_remove_adapter_mr(adapter);
3093
3094 i++;
3095 }
3096 return 0;
3097 }
3098
3099 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3100 u32 logical_port_id)
3101 {
3102 struct device_node *lhea_dn;
3103 struct device_node *eth_dn = NULL;
3104 const u32 *dn_log_port_id;
3105
3106 lhea_dn = adapter->ofdev->dev.of_node;
3107 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3108
3109 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3110 NULL);
3111 if (dn_log_port_id)
3112 if (*dn_log_port_id == logical_port_id)
3113 return eth_dn;
3114 }
3115
3116 return NULL;
3117 }
3118
3119 static ssize_t ehea_probe_port(struct device *dev,
3120 struct device_attribute *attr,
3121 const char *buf, size_t count)
3122 {
3123 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3124 struct ehea_port *port;
3125 struct device_node *eth_dn = NULL;
3126 int i;
3127
3128 u32 logical_port_id;
3129
3130 sscanf(buf, "%d", &logical_port_id);
3131
3132 port = ehea_get_port(adapter, logical_port_id);
3133
3134 if (port) {
3135 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3136 logical_port_id);
3137 return -EINVAL;
3138 }
3139
3140 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3141
3142 if (!eth_dn) {
3143 pr_info("no logical port with id %d found\n", logical_port_id);
3144 return -EINVAL;
3145 }
3146
3147 if (ehea_add_adapter_mr(adapter)) {
3148 pr_err("creating MR failed\n");
3149 of_node_put(eth_dn);
3150 return -EIO;
3151 }
3152
3153 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3154
3155 of_node_put(eth_dn);
3156
3157 if (port) {
3158 for (i = 0; i < EHEA_MAX_PORTS; i++)
3159 if (!adapter->port[i]) {
3160 adapter->port[i] = port;
3161 break;
3162 }
3163
3164 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3165 logical_port_id);
3166 } else {
3167 ehea_remove_adapter_mr(adapter);
3168 return -EIO;
3169 }
3170
3171 return (ssize_t) count;
3172 }
3173
3174 static ssize_t ehea_remove_port(struct device *dev,
3175 struct device_attribute *attr,
3176 const char *buf, size_t count)
3177 {
3178 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3179 struct ehea_port *port;
3180 int i;
3181 u32 logical_port_id;
3182
3183 sscanf(buf, "%d", &logical_port_id);
3184
3185 port = ehea_get_port(adapter, logical_port_id);
3186
3187 if (port) {
3188 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3189 logical_port_id);
3190
3191 ehea_shutdown_single_port(port);
3192
3193 for (i = 0; i < EHEA_MAX_PORTS; i++)
3194 if (adapter->port[i] == port) {
3195 adapter->port[i] = NULL;
3196 break;
3197 }
3198 } else {
3199 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3200 logical_port_id);
3201 return -EINVAL;
3202 }
3203
3204 ehea_remove_adapter_mr(adapter);
3205
3206 return (ssize_t) count;
3207 }
3208
3209 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3210 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3211
3212 static int ehea_create_device_sysfs(struct platform_device *dev)
3213 {
3214 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3215 if (ret)
3216 goto out;
3217
3218 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3219 out:
3220 return ret;
3221 }
3222
3223 static void ehea_remove_device_sysfs(struct platform_device *dev)
3224 {
3225 device_remove_file(&dev->dev, &dev_attr_probe_port);
3226 device_remove_file(&dev->dev, &dev_attr_remove_port);
3227 }
3228
3229 static int ehea_reboot_notifier(struct notifier_block *nb,
3230 unsigned long action, void *unused)
3231 {
3232 if (action == SYS_RESTART) {
3233 pr_info("Reboot: freeing all eHEA resources\n");
3234 ibmebus_unregister_driver(&ehea_driver);
3235 }
3236 return NOTIFY_DONE;
3237 }
3238
3239 static struct notifier_block ehea_reboot_nb = {
3240 .notifier_call = ehea_reboot_notifier,
3241 };
3242
3243 static int ehea_mem_notifier(struct notifier_block *nb,
3244 unsigned long action, void *data)
3245 {
3246 int ret = NOTIFY_BAD;
3247 struct memory_notify *arg = data;
3248
3249 mutex_lock(&dlpar_mem_lock);
3250
3251 switch (action) {
3252 case MEM_CANCEL_OFFLINE:
3253 pr_info("memory offlining canceled");
3254 /* Fall through - re-add canceled memory block */
3255
3256 case MEM_ONLINE:
3257 pr_info("memory is going online");
3258 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3259 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3260 goto out_unlock;
3261 ehea_rereg_mrs();
3262 break;
3263
3264 case MEM_GOING_OFFLINE:
3265 pr_info("memory is going offline");
3266 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3267 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3268 goto out_unlock;
3269 ehea_rereg_mrs();
3270 break;
3271
3272 default:
3273 break;
3274 }
3275
3276 ehea_update_firmware_handles();
3277 ret = NOTIFY_OK;
3278
3279 out_unlock:
3280 mutex_unlock(&dlpar_mem_lock);
3281 return ret;
3282 }
3283
3284 static struct notifier_block ehea_mem_nb = {
3285 .notifier_call = ehea_mem_notifier,
3286 };
3287
3288 static void ehea_crash_handler(void)
3289 {
3290 int i;
3291
3292 if (ehea_fw_handles.arr)
3293 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3294 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3295 ehea_fw_handles.arr[i].fwh,
3296 FORCE_FREE);
3297
3298 if (ehea_bcmc_regs.arr)
3299 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3300 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3301 ehea_bcmc_regs.arr[i].port_id,
3302 ehea_bcmc_regs.arr[i].reg_type,
3303 ehea_bcmc_regs.arr[i].macaddr,
3304 0, H_DEREG_BCMC);
3305 }
3306
3307 static atomic_t ehea_memory_hooks_registered;
3308
3309 /* Register memory hooks on probe of first adapter */
3310 static int ehea_register_memory_hooks(void)
3311 {
3312 int ret = 0;
3313
3314 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3315 return 0;
3316
3317 ret = ehea_create_busmap();
3318 if (ret) {
3319 pr_info("ehea_create_busmap failed\n");
3320 goto out;
3321 }
3322
3323 ret = register_reboot_notifier(&ehea_reboot_nb);
3324 if (ret) {
3325 pr_info("register_reboot_notifier failed\n");
3326 goto out;
3327 }
3328
3329 ret = register_memory_notifier(&ehea_mem_nb);
3330 if (ret) {
3331 pr_info("register_memory_notifier failed\n");
3332 goto out2;
3333 }
3334
3335 ret = crash_shutdown_register(ehea_crash_handler);
3336 if (ret) {
3337 pr_info("crash_shutdown_register failed\n");
3338 goto out3;
3339 }
3340
3341 return 0;
3342
3343 out3:
3344 unregister_memory_notifier(&ehea_mem_nb);
3345 out2:
3346 unregister_reboot_notifier(&ehea_reboot_nb);
3347 out:
3348 atomic_dec(&ehea_memory_hooks_registered);
3349 return ret;
3350 }
3351
3352 static void ehea_unregister_memory_hooks(void)
3353 {
3354 /* Only remove the hooks if we've registered them */
3355 if (atomic_read(&ehea_memory_hooks_registered) == 0)
3356 return;
3357
3358 unregister_reboot_notifier(&ehea_reboot_nb);
3359 if (crash_shutdown_unregister(ehea_crash_handler))
3360 pr_info("failed unregistering crash handler\n");
3361 unregister_memory_notifier(&ehea_mem_nb);
3362 }
3363
3364 static int ehea_probe_adapter(struct platform_device *dev)
3365 {
3366 struct ehea_adapter *adapter;
3367 const u64 *adapter_handle;
3368 int ret;
3369 int i;
3370
3371 ret = ehea_register_memory_hooks();
3372 if (ret)
3373 return ret;
3374
3375 if (!dev || !dev->dev.of_node) {
3376 pr_err("Invalid ibmebus device probed\n");
3377 return -EINVAL;
3378 }
3379
3380 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3381 if (!adapter) {
3382 ret = -ENOMEM;
3383 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3384 goto out;
3385 }
3386
3387 list_add(&adapter->list, &adapter_list);
3388
3389 adapter->ofdev = dev;
3390
3391 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3392 NULL);
3393 if (adapter_handle)
3394 adapter->handle = *adapter_handle;
3395
3396 if (!adapter->handle) {
3397 dev_err(&dev->dev, "failed getting handle for adapter"
3398 " '%pOF'\n", dev->dev.of_node);
3399 ret = -ENODEV;
3400 goto out_free_ad;
3401 }
3402
3403 adapter->pd = EHEA_PD_ID;
3404
3405 platform_set_drvdata(dev, adapter);
3406
3407
3408 /* initialize adapter and ports */
3409 /* get adapter properties */
3410 ret = ehea_sense_adapter_attr(adapter);
3411 if (ret) {
3412 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3413 goto out_free_ad;
3414 }
3415
3416 adapter->neq = ehea_create_eq(adapter,
3417 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3418 if (!adapter->neq) {
3419 ret = -EIO;
3420 dev_err(&dev->dev, "NEQ creation failed\n");
3421 goto out_free_ad;
3422 }
3423
3424 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3425 (unsigned long)adapter);
3426
3427 ret = ehea_create_device_sysfs(dev);
3428 if (ret)
3429 goto out_kill_eq;
3430
3431 ret = ehea_setup_ports(adapter);
3432 if (ret) {
3433 dev_err(&dev->dev, "setup_ports failed\n");
3434 goto out_rem_dev_sysfs;
3435 }
3436
3437 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3438 ehea_interrupt_neq, 0,
3439 "ehea_neq", adapter);
3440 if (ret) {
3441 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3442 goto out_shutdown_ports;
3443 }
3444
3445 /* Handle any events that might be pending. */
3446 tasklet_hi_schedule(&adapter->neq_tasklet);
3447
3448 ret = 0;
3449 goto out;
3450
3451 out_shutdown_ports:
3452 for (i = 0; i < EHEA_MAX_PORTS; i++)
3453 if (adapter->port[i]) {
3454 ehea_shutdown_single_port(adapter->port[i]);
3455 adapter->port[i] = NULL;
3456 }
3457
3458 out_rem_dev_sysfs:
3459 ehea_remove_device_sysfs(dev);
3460
3461 out_kill_eq:
3462 ehea_destroy_eq(adapter->neq);
3463
3464 out_free_ad:
3465 list_del(&adapter->list);
3466
3467 out:
3468 ehea_update_firmware_handles();
3469
3470 return ret;
3471 }
3472
3473 static int ehea_remove(struct platform_device *dev)
3474 {
3475 struct ehea_adapter *adapter = platform_get_drvdata(dev);
3476 int i;
3477
3478 for (i = 0; i < EHEA_MAX_PORTS; i++)
3479 if (adapter->port[i]) {
3480 ehea_shutdown_single_port(adapter->port[i]);
3481 adapter->port[i] = NULL;
3482 }
3483
3484 ehea_remove_device_sysfs(dev);
3485
3486 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3487 tasklet_kill(&adapter->neq_tasklet);
3488
3489 ehea_destroy_eq(adapter->neq);
3490 ehea_remove_adapter_mr(adapter);
3491 list_del(&adapter->list);
3492
3493 ehea_update_firmware_handles();
3494
3495 return 0;
3496 }
3497
3498 static int check_module_parm(void)
3499 {
3500 int ret = 0;
3501
3502 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3503 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3504 pr_info("Bad parameter: rq1_entries\n");
3505 ret = -EINVAL;
3506 }
3507 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3508 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3509 pr_info("Bad parameter: rq2_entries\n");
3510 ret = -EINVAL;
3511 }
3512 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3513 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3514 pr_info("Bad parameter: rq3_entries\n");
3515 ret = -EINVAL;
3516 }
3517 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3518 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3519 pr_info("Bad parameter: sq_entries\n");
3520 ret = -EINVAL;
3521 }
3522
3523 return ret;
3524 }
3525
3526 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3527 {
3528 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3529 }
3530
3531 static DRIVER_ATTR_RO(capabilities);
3532
3533 static int __init ehea_module_init(void)
3534 {
3535 int ret;
3536
3537 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3538
3539 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3540 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3541
3542 mutex_init(&ehea_fw_handles.lock);
3543 spin_lock_init(&ehea_bcmc_regs.lock);
3544
3545 ret = check_module_parm();
3546 if (ret)
3547 goto out;
3548
3549 ret = ibmebus_register_driver(&ehea_driver);
3550 if (ret) {
3551 pr_err("failed registering eHEA device driver on ebus\n");
3552 goto out;
3553 }
3554
3555 ret = driver_create_file(&ehea_driver.driver,
3556 &driver_attr_capabilities);
3557 if (ret) {
3558 pr_err("failed to register capabilities attribute, ret=%d\n",
3559 ret);
3560 goto out2;
3561 }
3562
3563 return ret;
3564
3565 out2:
3566 ibmebus_unregister_driver(&ehea_driver);
3567 out:
3568 return ret;
3569 }
3570
3571 static void __exit ehea_module_exit(void)
3572 {
3573 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3574 ibmebus_unregister_driver(&ehea_driver);
3575 ehea_unregister_memory_hooks();
3576 kfree(ehea_fw_handles.arr);
3577 kfree(ehea_bcmc_regs.arr);
3578 ehea_destroy_busmap();
3579 }
3580
3581 module_init(ehea_module_init);
3582 module_exit(ehea_module_exit);
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