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