1 /*
2 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
3 *
4 * eHEA ethernet device driver for IBM eServer System p
5 *
6 * (C) Copyright IBM Corp. 2006
7 *
8 * Authors:
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
12 *
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/device.h>
32 #include <linux/in.h>
33 #include <linux/ip.h>
34 #include <linux/tcp.h>
35 #include <linux/udp.h>
36 #include <linux/if.h>
37 #include <linux/list.h>
38 #include <linux/slab.h>
39 #include <linux/if_ether.h>
40 #include <linux/notifier.h>
41 #include <linux/reboot.h>
42 #include <linux/memory.h>
43 #include <asm/kexec.h>
44 #include <linux/mutex.h>
45 #include <linux/prefetch.h>
47 #include <net/ip.h>
49 #include "ehea.h"
50 #include "ehea_qmr.h"
51 #include "ehea_phyp.h"
54 MODULE_LICENSE("GPL");
55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
56 MODULE_DESCRIPTION("IBM eServer HEA Driver");
57 MODULE_VERSION(DRV_VERSION);
60 static int msg_level = -1;
61 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
62 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
63 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
64 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
65 static int use_mcs = 1;
66 static int prop_carrier_state;
68 module_param(msg_level, int, 0);
69 module_param(rq1_entries, int, 0);
70 module_param(rq2_entries, int, 0);
71 module_param(rq3_entries, int, 0);
72 module_param(sq_entries, int, 0);
73 module_param(prop_carrier_state, int, 0);
74 module_param(use_mcs, int, 0);
76 MODULE_PARM_DESC(msg_level, "msg_level");
77 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
78 "port to stack. 1:yes, 0:no. Default = 0 ");
79 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
80 "[2^x - 1], x = [7..14]. Default = "
81 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
82 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
83 "[2^x - 1], x = [7..14]. Default = "
84 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
85 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
86 "[2^x - 1], x = [7..14]. Default = "
87 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
88 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
89 "[2^x - 1], x = [7..14]. Default = "
90 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
91 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
92 "Default = 1");
94 static int port_name_cnt;
95 static LIST_HEAD(adapter_list);
96 static unsigned long ehea_driver_flags;
97 static DEFINE_MUTEX(dlpar_mem_lock);
98 static struct ehea_fw_handle_array ehea_fw_handles;
99 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
102 static int ehea_probe_adapter(struct platform_device *dev);
104 static int ehea_remove(struct platform_device *dev);
106 static const struct of_device_id ehea_module_device_table[] = {
107 {
108 .name = "lhea",
109 .compatible = "IBM,lhea",
110 },
111 {
112 .type = "network",
113 .compatible = "IBM,lhea-ethernet",
114 },
115 {},
116 };
117 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
119 static const struct of_device_id ehea_device_table[] = {
120 {
121 .name = "lhea",
122 .compatible = "IBM,lhea",
123 },
124 {},
125 };
127 static struct platform_driver ehea_driver = {
128 .driver = {
129 .name = "ehea",
130 .owner = THIS_MODULE,
131 .of_match_table = ehea_device_table,
132 },
133 .probe = ehea_probe_adapter,
134 .remove = ehea_remove,
135 };
137 void ehea_dump(void *adr, int len, char *msg)
138 {
139 int x;
140 unsigned char *deb = adr;
141 for (x = 0; x < len; x += 16) {
142 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
143 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
144 deb += 16;
145 }
146 }
148 static void ehea_schedule_port_reset(struct ehea_port *port)
149 {
150 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
151 schedule_work(&port->reset_task);
152 }
154 static void ehea_update_firmware_handles(void)
155 {
156 struct ehea_fw_handle_entry *arr = NULL;
157 struct ehea_adapter *adapter;
158 int num_adapters = 0;
159 int num_ports = 0;
160 int num_portres = 0;
161 int i = 0;
162 int num_fw_handles, k, l;
164 /* Determine number of handles */
165 mutex_lock(&ehea_fw_handles.lock);
167 list_for_each_entry(adapter, &adapter_list, list) {
168 num_adapters++;
170 for (k = 0; k < EHEA_MAX_PORTS; k++) {
171 struct ehea_port *port = adapter->port[k];
173 if (!port || (port->state != EHEA_PORT_UP))
174 continue;
176 num_ports++;
177 num_portres += port->num_def_qps;
178 }
179 }
181 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
182 num_ports * EHEA_NUM_PORT_FW_HANDLES +
183 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
185 if (num_fw_handles) {
186 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
187 if (!arr)
188 goto out; /* Keep the existing array */
189 } else
190 goto out_update;
192 list_for_each_entry(adapter, &adapter_list, list) {
193 if (num_adapters == 0)
194 break;
196 for (k = 0; k < EHEA_MAX_PORTS; k++) {
197 struct ehea_port *port = adapter->port[k];
199 if (!port || (port->state != EHEA_PORT_UP) ||
200 (num_ports == 0))
201 continue;
203 for (l = 0; l < port->num_def_qps; l++) {
204 struct ehea_port_res *pr = &port->port_res[l];
206 arr[i].adh = adapter->handle;
207 arr[i++].fwh = pr->qp->fw_handle;
208 arr[i].adh = adapter->handle;
209 arr[i++].fwh = pr->send_cq->fw_handle;
210 arr[i].adh = adapter->handle;
211 arr[i++].fwh = pr->recv_cq->fw_handle;
212 arr[i].adh = adapter->handle;
213 arr[i++].fwh = pr->eq->fw_handle;
214 arr[i].adh = adapter->handle;
215 arr[i++].fwh = pr->send_mr.handle;
216 arr[i].adh = adapter->handle;
217 arr[i++].fwh = pr->recv_mr.handle;
218 }
219 arr[i].adh = adapter->handle;
220 arr[i++].fwh = port->qp_eq->fw_handle;
221 num_ports--;
222 }
224 arr[i].adh = adapter->handle;
225 arr[i++].fwh = adapter->neq->fw_handle;
227 if (adapter->mr.handle) {
228 arr[i].adh = adapter->handle;
229 arr[i++].fwh = adapter->mr.handle;
230 }
231 num_adapters--;
232 }
234 out_update:
235 kfree(ehea_fw_handles.arr);
236 ehea_fw_handles.arr = arr;
237 ehea_fw_handles.num_entries = i;
238 out:
239 mutex_unlock(&ehea_fw_handles.lock);
240 }
242 static void ehea_update_bcmc_registrations(void)
243 {
244 unsigned long flags;
245 struct ehea_bcmc_reg_entry *arr = NULL;
246 struct ehea_adapter *adapter;
247 struct ehea_mc_list *mc_entry;
248 int num_registrations = 0;
249 int i = 0;
250 int k;
252 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
254 /* Determine number of registrations */
255 list_for_each_entry(adapter, &adapter_list, list)
256 for (k = 0; k < EHEA_MAX_PORTS; k++) {
257 struct ehea_port *port = adapter->port[k];
259 if (!port || (port->state != EHEA_PORT_UP))
260 continue;
262 num_registrations += 2; /* Broadcast registrations */
264 list_for_each_entry(mc_entry, &port->mc_list->list,list)
265 num_registrations += 2;
266 }
268 if (num_registrations) {
269 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
270 if (!arr)
271 goto out; /* Keep the existing array */
272 } else
273 goto out_update;
275 list_for_each_entry(adapter, &adapter_list, list) {
276 for (k = 0; k < EHEA_MAX_PORTS; k++) {
277 struct ehea_port *port = adapter->port[k];
279 if (!port || (port->state != EHEA_PORT_UP))
280 continue;
282 if (num_registrations == 0)
283 goto out_update;
285 arr[i].adh = adapter->handle;
286 arr[i].port_id = port->logical_port_id;
287 arr[i].reg_type = EHEA_BCMC_BROADCAST |
288 EHEA_BCMC_UNTAGGED;
289 arr[i++].macaddr = port->mac_addr;
291 arr[i].adh = adapter->handle;
292 arr[i].port_id = port->logical_port_id;
293 arr[i].reg_type = EHEA_BCMC_BROADCAST |
294 EHEA_BCMC_VLANID_ALL;
295 arr[i++].macaddr = port->mac_addr;
296 num_registrations -= 2;
298 list_for_each_entry(mc_entry,
299 &port->mc_list->list, list) {
300 if (num_registrations == 0)
301 goto out_update;
303 arr[i].adh = adapter->handle;
304 arr[i].port_id = port->logical_port_id;
305 arr[i].reg_type = EHEA_BCMC_MULTICAST |
306 EHEA_BCMC_UNTAGGED;
307 if (mc_entry->macaddr == 0)
308 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
309 arr[i++].macaddr = mc_entry->macaddr;
311 arr[i].adh = adapter->handle;
312 arr[i].port_id = port->logical_port_id;
313 arr[i].reg_type = EHEA_BCMC_MULTICAST |
314 EHEA_BCMC_VLANID_ALL;
315 if (mc_entry->macaddr == 0)
316 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
317 arr[i++].macaddr = mc_entry->macaddr;
318 num_registrations -= 2;
319 }
320 }
321 }
323 out_update:
324 kfree(ehea_bcmc_regs.arr);
325 ehea_bcmc_regs.arr = arr;
326 ehea_bcmc_regs.num_entries = i;
327 out:
328 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
329 }
331 static void ehea_get_stats64(struct net_device *dev,
332 struct rtnl_link_stats64 *stats)
333 {
334 struct ehea_port *port = netdev_priv(dev);
335 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
336 int i;
338 for (i = 0; i < port->num_def_qps; i++) {
339 rx_packets += port->port_res[i].rx_packets;
340 rx_bytes += port->port_res[i].rx_bytes;
341 }
343 for (i = 0; i < port->num_def_qps; i++) {
344 tx_packets += port->port_res[i].tx_packets;
345 tx_bytes += port->port_res[i].tx_bytes;
346 }
348 stats->tx_packets = tx_packets;
349 stats->rx_bytes = rx_bytes;
350 stats->tx_bytes = tx_bytes;
351 stats->rx_packets = rx_packets;
353 stats->multicast = port->stats.multicast;
354 stats->rx_errors = port->stats.rx_errors;
355 }
357 static void ehea_update_stats(struct work_struct *work)
358 {
359 struct ehea_port *port =
360 container_of(work, struct ehea_port, stats_work.work);
361 struct net_device *dev = port->netdev;
362 struct rtnl_link_stats64 *stats = &port->stats;
363 struct hcp_ehea_port_cb2 *cb2;
364 u64 hret;
366 cb2 = (void *)get_zeroed_page(GFP_KERNEL);
367 if (!cb2) {
368 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
369 goto resched;
370 }
372 hret = ehea_h_query_ehea_port(port->adapter->handle,
373 port->logical_port_id,
374 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
375 if (hret != H_SUCCESS) {
376 netdev_err(dev, "query_ehea_port failed\n");
377 goto out_herr;
378 }
380 if (netif_msg_hw(port))
381 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
383 stats->multicast = cb2->rxmcp;
384 stats->rx_errors = cb2->rxuerr;
386 out_herr:
387 free_page((unsigned long)cb2);
388 resched:
389 schedule_delayed_work(&port->stats_work,
390 round_jiffies_relative(msecs_to_jiffies(1000)));
391 }
393 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
394 {
395 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
396 struct net_device *dev = pr->port->netdev;
397 int max_index_mask = pr->rq1_skba.len - 1;
398 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
399 int adder = 0;
400 int i;
402 pr->rq1_skba.os_skbs = 0;
404 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
405 if (nr_of_wqes > 0)
406 pr->rq1_skba.index = index;
407 pr->rq1_skba.os_skbs = fill_wqes;
408 return;
409 }
411 for (i = 0; i < fill_wqes; i++) {
412 if (!skb_arr_rq1[index]) {
413 skb_arr_rq1[index] = netdev_alloc_skb(dev,
414 EHEA_L_PKT_SIZE);
415 if (!skb_arr_rq1[index]) {
416 pr->rq1_skba.os_skbs = fill_wqes - i;
417 break;
418 }
419 }
420 index--;
421 index &= max_index_mask;
422 adder++;
423 }
425 if (adder == 0)
426 return;
428 /* Ring doorbell */
429 ehea_update_rq1a(pr->qp, adder);
430 }
432 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
433 {
434 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
435 struct net_device *dev = pr->port->netdev;
436 int i;
438 if (nr_rq1a > pr->rq1_skba.len) {
439 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
440 return;
441 }
443 for (i = 0; i < nr_rq1a; i++) {
444 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
445 if (!skb_arr_rq1[i])
446 break;
447 }
448 /* Ring doorbell */
449 ehea_update_rq1a(pr->qp, i - 1);
450 }
452 static int ehea_refill_rq_def(struct ehea_port_res *pr,
453 struct ehea_q_skb_arr *q_skba, int rq_nr,
454 int num_wqes, int wqe_type, int packet_size)
455 {
456 struct net_device *dev = pr->port->netdev;
457 struct ehea_qp *qp = pr->qp;
458 struct sk_buff **skb_arr = q_skba->arr;
459 struct ehea_rwqe *rwqe;
460 int i, index, max_index_mask, fill_wqes;
461 int adder = 0;
462 int ret = 0;
464 fill_wqes = q_skba->os_skbs + num_wqes;
465 q_skba->os_skbs = 0;
467 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
468 q_skba->os_skbs = fill_wqes;
469 return ret;
470 }
472 index = q_skba->index;
473 max_index_mask = q_skba->len - 1;
474 for (i = 0; i < fill_wqes; i++) {
475 u64 tmp_addr;
476 struct sk_buff *skb;
478 skb = netdev_alloc_skb_ip_align(dev, packet_size);
479 if (!skb) {
480 q_skba->os_skbs = fill_wqes - i;
481 if (q_skba->os_skbs == q_skba->len - 2) {
482 netdev_info(pr->port->netdev,
483 "rq%i ran dry - no mem for skb\n",
484 rq_nr);
485 ret = -ENOMEM;
486 }
487 break;
488 }
490 skb_arr[index] = skb;
491 tmp_addr = ehea_map_vaddr(skb->data);
492 if (tmp_addr == -1) {
493 dev_consume_skb_any(skb);
494 q_skba->os_skbs = fill_wqes - i;
495 ret = 0;
496 break;
497 }
499 rwqe = ehea_get_next_rwqe(qp, rq_nr);
500 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
501 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
502 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
503 rwqe->sg_list[0].vaddr = tmp_addr;
504 rwqe->sg_list[0].len = packet_size;
505 rwqe->data_segments = 1;
507 index++;
508 index &= max_index_mask;
509 adder++;
510 }
512 q_skba->index = index;
513 if (adder == 0)
514 goto out;
516 /* Ring doorbell */
517 iosync();
518 if (rq_nr == 2)
519 ehea_update_rq2a(pr->qp, adder);
520 else
521 ehea_update_rq3a(pr->qp, adder);
522 out:
523 return ret;
524 }
527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
528 {
529 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
530 nr_of_wqes, EHEA_RWQE2_TYPE,
531 EHEA_RQ2_PKT_SIZE);
532 }
535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
536 {
537 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
538 nr_of_wqes, EHEA_RWQE3_TYPE,
539 EHEA_MAX_PACKET_SIZE);
540 }
542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
543 {
544 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
545 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
546 return 0;
547 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
548 (cqe->header_length == 0))
549 return 0;
550 return -EINVAL;
551 }
553 static inline void ehea_fill_skb(struct net_device *dev,
554 struct sk_buff *skb, struct ehea_cqe *cqe,
555 struct ehea_port_res *pr)
556 {
557 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
559 skb_put(skb, length);
560 skb->protocol = eth_type_trans(skb, dev);
562 /* The packet was not an IPV4 packet so a complemented checksum was
563 calculated. The value is found in the Internet Checksum field. */
564 if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
565 skb->ip_summed = CHECKSUM_COMPLETE;
566 skb->csum = csum_unfold(~cqe->inet_checksum_value);
567 } else
568 skb->ip_summed = CHECKSUM_UNNECESSARY;
570 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
571 }
573 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
574 int arr_len,
575 struct ehea_cqe *cqe)
576 {
577 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
578 struct sk_buff *skb;
579 void *pref;
580 int x;
582 x = skb_index + 1;
583 x &= (arr_len - 1);
585 pref = skb_array[x];
586 if (pref) {
587 prefetchw(pref);
588 prefetchw(pref + EHEA_CACHE_LINE);
590 pref = (skb_array[x]->data);
591 prefetch(pref);
592 prefetch(pref + EHEA_CACHE_LINE);
593 prefetch(pref + EHEA_CACHE_LINE * 2);
594 prefetch(pref + EHEA_CACHE_LINE * 3);
595 }
597 skb = skb_array[skb_index];
598 skb_array[skb_index] = NULL;
599 return skb;
600 }
602 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
603 int arr_len, int wqe_index)
604 {
605 struct sk_buff *skb;
606 void *pref;
607 int x;
609 x = wqe_index + 1;
610 x &= (arr_len - 1);
612 pref = skb_array[x];
613 if (pref) {
614 prefetchw(pref);
615 prefetchw(pref + EHEA_CACHE_LINE);
617 pref = (skb_array[x]->data);
618 prefetchw(pref);
619 prefetchw(pref + EHEA_CACHE_LINE);
620 }
622 skb = skb_array[wqe_index];
623 skb_array[wqe_index] = NULL;
624 return skb;
625 }
627 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
628 struct ehea_cqe *cqe, int *processed_rq2,
629 int *processed_rq3)
630 {
631 struct sk_buff *skb;
633 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
634 pr->p_stats.err_tcp_cksum++;
635 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
636 pr->p_stats.err_ip_cksum++;
637 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
638 pr->p_stats.err_frame_crc++;
640 if (rq == 2) {
641 *processed_rq2 += 1;
642 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
643 dev_kfree_skb(skb);
644 } else if (rq == 3) {
645 *processed_rq3 += 1;
646 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
647 dev_kfree_skb(skb);
648 }
650 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
651 if (netif_msg_rx_err(pr->port)) {
652 pr_err("Critical receive error for QP %d. Resetting port.\n",
653 pr->qp->init_attr.qp_nr);
654 ehea_dump(cqe, sizeof(*cqe), "CQE");
655 }
656 ehea_schedule_port_reset(pr->port);
657 return 1;
658 }
660 return 0;
661 }
663 static int ehea_proc_rwqes(struct net_device *dev,
664 struct ehea_port_res *pr,
665 int budget)
666 {
667 struct ehea_port *port = pr->port;
668 struct ehea_qp *qp = pr->qp;
669 struct ehea_cqe *cqe;
670 struct sk_buff *skb;
671 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
672 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
673 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
674 int skb_arr_rq1_len = pr->rq1_skba.len;
675 int skb_arr_rq2_len = pr->rq2_skba.len;
676 int skb_arr_rq3_len = pr->rq3_skba.len;
677 int processed, processed_rq1, processed_rq2, processed_rq3;
678 u64 processed_bytes = 0;
679 int wqe_index, last_wqe_index, rq, port_reset;
681 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
682 last_wqe_index = 0;
684 cqe = ehea_poll_rq1(qp, &wqe_index);
685 while ((processed < budget) && cqe) {
686 ehea_inc_rq1(qp);
687 processed_rq1++;
688 processed++;
689 if (netif_msg_rx_status(port))
690 ehea_dump(cqe, sizeof(*cqe), "CQE");
692 last_wqe_index = wqe_index;
693 rmb();
694 if (!ehea_check_cqe(cqe, &rq)) {
695 if (rq == 1) {
696 /* LL RQ1 */
697 skb = get_skb_by_index_ll(skb_arr_rq1,
698 skb_arr_rq1_len,
699 wqe_index);
700 if (unlikely(!skb)) {
701 netif_info(port, rx_err, dev,
702 "LL rq1: skb=NULL\n");
704 skb = netdev_alloc_skb(dev,
705 EHEA_L_PKT_SIZE);
706 if (!skb)
707 break;
708 }
709 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
710 cqe->num_bytes_transfered - 4);
711 ehea_fill_skb(dev, skb, cqe, pr);
712 } else if (rq == 2) {
713 /* RQ2 */
714 skb = get_skb_by_index(skb_arr_rq2,
715 skb_arr_rq2_len, cqe);
716 if (unlikely(!skb)) {
717 netif_err(port, rx_err, dev,
718 "rq2: skb=NULL\n");
719 break;
720 }
721 ehea_fill_skb(dev, skb, cqe, pr);
722 processed_rq2++;
723 } else {
724 /* RQ3 */
725 skb = get_skb_by_index(skb_arr_rq3,
726 skb_arr_rq3_len, cqe);
727 if (unlikely(!skb)) {
728 netif_err(port, rx_err, dev,
729 "rq3: skb=NULL\n");
730 break;
731 }
732 ehea_fill_skb(dev, skb, cqe, pr);
733 processed_rq3++;
734 }
736 processed_bytes += skb->len;
738 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
739 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
740 cqe->vlan_tag);
742 napi_gro_receive(&pr->napi, skb);
743 } else {
744 pr->p_stats.poll_receive_errors++;
745 port_reset = ehea_treat_poll_error(pr, rq, cqe,
746 &processed_rq2,
747 &processed_rq3);
748 if (port_reset)
749 break;
750 }
751 cqe = ehea_poll_rq1(qp, &wqe_index);
752 }
754 pr->rx_packets += processed;
755 pr->rx_bytes += processed_bytes;
757 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
758 ehea_refill_rq2(pr, processed_rq2);
759 ehea_refill_rq3(pr, processed_rq3);
761 return processed;
762 }
764 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
766 static void reset_sq_restart_flag(struct ehea_port *port)
767 {
768 int i;
770 for (i = 0; i < port->num_def_qps; i++) {
771 struct ehea_port_res *pr = &port->port_res[i];
772 pr->sq_restart_flag = 0;
773 }
774 wake_up(&port->restart_wq);
775 }
777 static void check_sqs(struct ehea_port *port)
778 {
779 struct ehea_swqe *swqe;
780 int swqe_index;
781 int i, k;
783 for (i = 0; i < port->num_def_qps; i++) {
784 struct ehea_port_res *pr = &port->port_res[i];
785 int ret;
786 k = 0;
787 swqe = ehea_get_swqe(pr->qp, &swqe_index);
788 memset(swqe, 0, SWQE_HEADER_SIZE);
789 atomic_dec(&pr->swqe_avail);
791 swqe->tx_control |= EHEA_SWQE_PURGE;
792 swqe->wr_id = SWQE_RESTART_CHECK;
793 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
794 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
795 swqe->immediate_data_length = 80;
797 ehea_post_swqe(pr->qp, swqe);
799 ret = wait_event_timeout(port->restart_wq,
800 pr->sq_restart_flag == 0,
801 msecs_to_jiffies(100));
803 if (!ret) {
804 pr_err("HW/SW queues out of sync\n");
805 ehea_schedule_port_reset(pr->port);
806 return;
807 }
808 }
809 }
812 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
813 {
814 struct sk_buff *skb;
815 struct ehea_cq *send_cq = pr->send_cq;
816 struct ehea_cqe *cqe;
817 int quota = my_quota;
818 int cqe_counter = 0;
819 int swqe_av = 0;
820 int index;
821 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
822 pr - &pr->port->port_res[0]);
824 cqe = ehea_poll_cq(send_cq);
825 while (cqe && (quota > 0)) {
826 ehea_inc_cq(send_cq);
828 cqe_counter++;
829 rmb();
831 if (cqe->wr_id == SWQE_RESTART_CHECK) {
832 pr->sq_restart_flag = 1;
833 swqe_av++;
834 break;
835 }
837 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
838 pr_err("Bad send completion status=0x%04X\n",
839 cqe->status);
841 if (netif_msg_tx_err(pr->port))
842 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
844 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
845 pr_err("Resetting port\n");
846 ehea_schedule_port_reset(pr->port);
847 break;
848 }
849 }
851 if (netif_msg_tx_done(pr->port))
852 ehea_dump(cqe, sizeof(*cqe), "CQE");
854 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
855 == EHEA_SWQE2_TYPE)) {
857 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
858 skb = pr->sq_skba.arr[index];
859 dev_consume_skb_any(skb);
860 pr->sq_skba.arr[index] = NULL;
861 }
863 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
864 quota--;
866 cqe = ehea_poll_cq(send_cq);
867 }
869 ehea_update_feca(send_cq, cqe_counter);
870 atomic_add(swqe_av, &pr->swqe_avail);
872 if (unlikely(netif_tx_queue_stopped(txq) &&
873 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
874 __netif_tx_lock(txq, smp_processor_id());
875 if (netif_tx_queue_stopped(txq) &&
876 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
877 netif_tx_wake_queue(txq);
878 __netif_tx_unlock(txq);
879 }
881 wake_up(&pr->port->swqe_avail_wq);
883 return cqe;
884 }
886 #define EHEA_POLL_MAX_CQES 65535
888 static int ehea_poll(struct napi_struct *napi, int budget)
889 {
890 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
891 napi);
892 struct net_device *dev = pr->port->netdev;
893 struct ehea_cqe *cqe;
894 struct ehea_cqe *cqe_skb = NULL;
895 int wqe_index;
896 int rx = 0;
898 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
899 rx += ehea_proc_rwqes(dev, pr, budget - rx);
901 while (rx != budget) {
902 napi_complete(napi);
903 ehea_reset_cq_ep(pr->recv_cq);
904 ehea_reset_cq_ep(pr->send_cq);
905 ehea_reset_cq_n1(pr->recv_cq);
906 ehea_reset_cq_n1(pr->send_cq);
907 rmb();
908 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
909 cqe_skb = ehea_poll_cq(pr->send_cq);
911 if (!cqe && !cqe_skb)
912 return rx;
914 if (!napi_reschedule(napi))
915 return rx;
917 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
918 rx += ehea_proc_rwqes(dev, pr, budget - rx);
919 }
921 return rx;
922 }
924 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
925 {
926 struct ehea_port_res *pr = param;
928 napi_schedule(&pr->napi);
930 return IRQ_HANDLED;
931 }
933 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
934 {
935 struct ehea_port *port = param;
936 struct ehea_eqe *eqe;
937 struct ehea_qp *qp;
938 u32 qp_token;
939 u64 resource_type, aer, aerr;
940 int reset_port = 0;
942 eqe = ehea_poll_eq(port->qp_eq);
944 while (eqe) {
945 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
946 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
947 eqe->entry, qp_token);
949 qp = port->port_res[qp_token].qp;
951 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
952 &aer, &aerr);
954 if (resource_type == EHEA_AER_RESTYPE_QP) {
955 if ((aer & EHEA_AER_RESET_MASK) ||
956 (aerr & EHEA_AERR_RESET_MASK))
957 reset_port = 1;
958 } else
959 reset_port = 1; /* Reset in case of CQ or EQ error */
961 eqe = ehea_poll_eq(port->qp_eq);
962 }
964 if (reset_port) {
965 pr_err("Resetting port\n");
966 ehea_schedule_port_reset(port);
967 }
969 return IRQ_HANDLED;
970 }
972 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
973 int logical_port)
974 {
975 int i;
977 for (i = 0; i < EHEA_MAX_PORTS; i++)
978 if (adapter->port[i])
979 if (adapter->port[i]->logical_port_id == logical_port)
980 return adapter->port[i];
981 return NULL;
982 }
984 int ehea_sense_port_attr(struct ehea_port *port)
985 {
986 int ret;
987 u64 hret;
988 struct hcp_ehea_port_cb0 *cb0;
990 /* may be called via ehea_neq_tasklet() */
991 cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
992 if (!cb0) {
993 pr_err("no mem for cb0\n");
994 ret = -ENOMEM;
995 goto out;
996 }
998 hret = ehea_h_query_ehea_port(port->adapter->handle,
999 port->logical_port_id, H_PORT_CB0,
1000 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1001 cb0);
1002 if (hret != H_SUCCESS) {
1003 ret = -EIO;
1004 goto out_free;
1005 }
1007 /* MAC address */
1008 port->mac_addr = cb0->port_mac_addr << 16;
1010 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1011 ret = -EADDRNOTAVAIL;
1012 goto out_free;
1013 }
1015 /* Port speed */
1016 switch (cb0->port_speed) {
1017 case H_SPEED_10M_H:
1018 port->port_speed = EHEA_SPEED_10M;
1019 port->full_duplex = 0;
1020 break;
1021 case H_SPEED_10M_F:
1022 port->port_speed = EHEA_SPEED_10M;
1023 port->full_duplex = 1;
1024 break;
1025 case H_SPEED_100M_H:
1026 port->port_speed = EHEA_SPEED_100M;
1027 port->full_duplex = 0;
1028 break;
1029 case H_SPEED_100M_F:
1030 port->port_speed = EHEA_SPEED_100M;
1031 port->full_duplex = 1;
1032 break;
1033 case H_SPEED_1G_F:
1034 port->port_speed = EHEA_SPEED_1G;
1035 port->full_duplex = 1;
1036 break;
1037 case H_SPEED_10G_F:
1038 port->port_speed = EHEA_SPEED_10G;
1039 port->full_duplex = 1;
1040 break;
1041 default:
1042 port->port_speed = 0;
1043 port->full_duplex = 0;
1044 break;
1045 }
1047 port->autoneg = 1;
1048 port->num_mcs = cb0->num_default_qps;
1050 /* Number of default QPs */
1051 if (use_mcs)
1052 port->num_def_qps = cb0->num_default_qps;
1053 else
1054 port->num_def_qps = 1;
1056 if (!port->num_def_qps) {
1057 ret = -EINVAL;
1058 goto out_free;
1059 }
1061 ret = 0;
1062 out_free:
1063 if (ret || netif_msg_probe(port))
1064 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1065 free_page((unsigned long)cb0);
1066 out:
1067 return ret;
1068 }
1070 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1071 {
1072 struct hcp_ehea_port_cb4 *cb4;
1073 u64 hret;
1074 int ret = 0;
1076 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1077 if (!cb4) {
1078 pr_err("no mem for cb4\n");
1079 ret = -ENOMEM;
1080 goto out;
1081 }
1083 cb4->port_speed = port_speed;
1085 netif_carrier_off(port->netdev);
1087 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1088 port->logical_port_id,
1089 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1090 if (hret == H_SUCCESS) {
1091 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1093 hret = ehea_h_query_ehea_port(port->adapter->handle,
1094 port->logical_port_id,
1095 H_PORT_CB4, H_PORT_CB4_SPEED,
1096 cb4);
1097 if (hret == H_SUCCESS) {
1098 switch (cb4->port_speed) {
1099 case H_SPEED_10M_H:
1100 port->port_speed = EHEA_SPEED_10M;
1101 port->full_duplex = 0;
1102 break;
1103 case H_SPEED_10M_F:
1104 port->port_speed = EHEA_SPEED_10M;
1105 port->full_duplex = 1;
1106 break;
1107 case H_SPEED_100M_H:
1108 port->port_speed = EHEA_SPEED_100M;
1109 port->full_duplex = 0;
1110 break;
1111 case H_SPEED_100M_F:
1112 port->port_speed = EHEA_SPEED_100M;
1113 port->full_duplex = 1;
1114 break;
1115 case H_SPEED_1G_F:
1116 port->port_speed = EHEA_SPEED_1G;
1117 port->full_duplex = 1;
1118 break;
1119 case H_SPEED_10G_F:
1120 port->port_speed = EHEA_SPEED_10G;
1121 port->full_duplex = 1;
1122 break;
1123 default:
1124 port->port_speed = 0;
1125 port->full_duplex = 0;
1126 break;
1127 }
1128 } else {
1129 pr_err("Failed sensing port speed\n");
1130 ret = -EIO;
1131 }
1132 } else {
1133 if (hret == H_AUTHORITY) {
1134 pr_info("Hypervisor denied setting port speed\n");
1135 ret = -EPERM;
1136 } else {
1137 ret = -EIO;
1138 pr_err("Failed setting port speed\n");
1139 }
1140 }
1141 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1142 netif_carrier_on(port->netdev);
1144 free_page((unsigned long)cb4);
1145 out:
1146 return ret;
1147 }
1149 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1150 {
1151 int ret;
1152 u8 ec;
1153 u8 portnum;
1154 struct ehea_port *port;
1155 struct net_device *dev;
1157 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1158 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1159 port = ehea_get_port(adapter, portnum);
1160 if (!port) {
1161 netdev_err(NULL, "unknown portnum %x\n", portnum);
1162 return;
1163 }
1164 dev = port->netdev;
1166 switch (ec) {
1167 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1169 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1170 if (!netif_carrier_ok(dev)) {
1171 ret = ehea_sense_port_attr(port);
1172 if (ret) {
1173 netdev_err(dev, "failed resensing port attributes\n");
1174 break;
1175 }
1177 netif_info(port, link, dev,
1178 "Logical port up: %dMbps %s Duplex\n",
1179 port->port_speed,
1180 port->full_duplex == 1 ?
1181 "Full" : "Half");
1183 netif_carrier_on(dev);
1184 netif_wake_queue(dev);
1185 }
1186 } else
1187 if (netif_carrier_ok(dev)) {
1188 netif_info(port, link, dev,
1189 "Logical port down\n");
1190 netif_carrier_off(dev);
1191 netif_tx_disable(dev);
1192 }
1194 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1195 port->phy_link = EHEA_PHY_LINK_UP;
1196 netif_info(port, link, dev,
1197 "Physical port up\n");
1198 if (prop_carrier_state)
1199 netif_carrier_on(dev);
1200 } else {
1201 port->phy_link = EHEA_PHY_LINK_DOWN;
1202 netif_info(port, link, dev,
1203 "Physical port down\n");
1204 if (prop_carrier_state)
1205 netif_carrier_off(dev);
1206 }
1208 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1209 netdev_info(dev,
1210 "External switch port is primary port\n");
1211 else
1212 netdev_info(dev,
1213 "External switch port is backup port\n");
1215 break;
1216 case EHEA_EC_ADAPTER_MALFUNC:
1217 netdev_err(dev, "Adapter malfunction\n");
1218 break;
1219 case EHEA_EC_PORT_MALFUNC:
1220 netdev_info(dev, "Port malfunction\n");
1221 netif_carrier_off(dev);
1222 netif_tx_disable(dev);
1223 break;
1224 default:
1225 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1226 break;
1227 }
1228 }
1230 static void ehea_neq_tasklet(unsigned long data)
1231 {
1232 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1233 struct ehea_eqe *eqe;
1234 u64 event_mask;
1236 eqe = ehea_poll_eq(adapter->neq);
1237 pr_debug("eqe=%p\n", eqe);
1239 while (eqe) {
1240 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1241 ehea_parse_eqe(adapter, eqe->entry);
1242 eqe = ehea_poll_eq(adapter->neq);
1243 pr_debug("next eqe=%p\n", eqe);
1244 }
1246 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1247 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1248 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1250 ehea_h_reset_events(adapter->handle,
1251 adapter->neq->fw_handle, event_mask);
1252 }
1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1255 {
1256 struct ehea_adapter *adapter = param;
1257 tasklet_hi_schedule(&adapter->neq_tasklet);
1258 return IRQ_HANDLED;
1259 }
1262 static int ehea_fill_port_res(struct ehea_port_res *pr)
1263 {
1264 int ret;
1265 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1267 ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1269 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1271 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1273 return ret;
1274 }
1276 static int ehea_reg_interrupts(struct net_device *dev)
1277 {
1278 struct ehea_port *port = netdev_priv(dev);
1279 struct ehea_port_res *pr;
1280 int i, ret;
1283 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1284 dev->name);
1286 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1287 ehea_qp_aff_irq_handler,
1288 0, port->int_aff_name, port);
1289 if (ret) {
1290 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1291 port->qp_eq->attr.ist1);
1292 goto out_free_qpeq;
1293 }
1295 netif_info(port, ifup, dev,
1296 "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1297 port->qp_eq->attr.ist1);
1300 for (i = 0; i < port->num_def_qps; i++) {
1301 pr = &port->port_res[i];
1302 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1303 "%s-queue%d", dev->name, i);
1304 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1305 ehea_recv_irq_handler,
1306 0, pr->int_send_name, pr);
1307 if (ret) {
1308 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1309 i, pr->eq->attr.ist1);
1310 goto out_free_req;
1311 }
1312 netif_info(port, ifup, dev,
1313 "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1314 pr->eq->attr.ist1, i);
1315 }
1316 out:
1317 return ret;
1320 out_free_req:
1321 while (--i >= 0) {
1322 u32 ist = port->port_res[i].eq->attr.ist1;
1323 ibmebus_free_irq(ist, &port->port_res[i]);
1324 }
1326 out_free_qpeq:
1327 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1328 i = port->num_def_qps;
1330 goto out;
1332 }
1334 static void ehea_free_interrupts(struct net_device *dev)
1335 {
1336 struct ehea_port *port = netdev_priv(dev);
1337 struct ehea_port_res *pr;
1338 int i;
1340 /* send */
1342 for (i = 0; i < port->num_def_qps; i++) {
1343 pr = &port->port_res[i];
1344 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1345 netif_info(port, intr, dev,
1346 "free send irq for res %d with handle 0x%X\n",
1347 i, pr->eq->attr.ist1);
1348 }
1350 /* associated events */
1351 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1352 netif_info(port, intr, dev,
1353 "associated event interrupt for handle 0x%X freed\n",
1354 port->qp_eq->attr.ist1);
1355 }
1357 static int ehea_configure_port(struct ehea_port *port)
1358 {
1359 int ret, i;
1360 u64 hret, mask;
1361 struct hcp_ehea_port_cb0 *cb0;
1363 ret = -ENOMEM;
1364 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1365 if (!cb0)
1366 goto out;
1368 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1369 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1370 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1371 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1372 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1373 PXLY_RC_VLAN_FILTER)
1374 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1376 for (i = 0; i < port->num_mcs; i++)
1377 if (use_mcs)
1378 cb0->default_qpn_arr[i] =
1379 port->port_res[i].qp->init_attr.qp_nr;
1380 else
1381 cb0->default_qpn_arr[i] =
1382 port->port_res[0].qp->init_attr.qp_nr;
1384 if (netif_msg_ifup(port))
1385 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1387 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1388 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1390 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1391 port->logical_port_id,
1392 H_PORT_CB0, mask, cb0);
1393 ret = -EIO;
1394 if (hret != H_SUCCESS)
1395 goto out_free;
1397 ret = 0;
1399 out_free:
1400 free_page((unsigned long)cb0);
1401 out:
1402 return ret;
1403 }
1405 static int ehea_gen_smrs(struct ehea_port_res *pr)
1406 {
1407 int ret;
1408 struct ehea_adapter *adapter = pr->port->adapter;
1410 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1411 if (ret)
1412 goto out;
1414 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1415 if (ret)
1416 goto out_free;
1418 return 0;
1420 out_free:
1421 ehea_rem_mr(&pr->send_mr);
1422 out:
1423 pr_err("Generating SMRS failed\n");
1424 return -EIO;
1425 }
1427 static int ehea_rem_smrs(struct ehea_port_res *pr)
1428 {
1429 if ((ehea_rem_mr(&pr->send_mr)) ||
1430 (ehea_rem_mr(&pr->recv_mr)))
1431 return -EIO;
1432 else
1433 return 0;
1434 }
1436 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1437 {
1438 int arr_size = sizeof(void *) * max_q_entries;
1440 q_skba->arr = vzalloc(arr_size);
1441 if (!q_skba->arr)
1442 return -ENOMEM;
1444 q_skba->len = max_q_entries;
1445 q_skba->index = 0;
1446 q_skba->os_skbs = 0;
1448 return 0;
1449 }
1451 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1452 struct port_res_cfg *pr_cfg, int queue_token)
1453 {
1454 struct ehea_adapter *adapter = port->adapter;
1455 enum ehea_eq_type eq_type = EHEA_EQ;
1456 struct ehea_qp_init_attr *init_attr = NULL;
1457 int ret = -EIO;
1458 u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1460 tx_bytes = pr->tx_bytes;
1461 tx_packets = pr->tx_packets;
1462 rx_bytes = pr->rx_bytes;
1463 rx_packets = pr->rx_packets;
1465 memset(pr, 0, sizeof(struct ehea_port_res));
1467 pr->tx_bytes = rx_bytes;
1468 pr->tx_packets = tx_packets;
1469 pr->rx_bytes = rx_bytes;
1470 pr->rx_packets = rx_packets;
1472 pr->port = port;
1474 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1475 if (!pr->eq) {
1476 pr_err("create_eq failed (eq)\n");
1477 goto out_free;
1478 }
1480 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1481 pr->eq->fw_handle,
1482 port->logical_port_id);
1483 if (!pr->recv_cq) {
1484 pr_err("create_cq failed (cq_recv)\n");
1485 goto out_free;
1486 }
1488 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1489 pr->eq->fw_handle,
1490 port->logical_port_id);
1491 if (!pr->send_cq) {
1492 pr_err("create_cq failed (cq_send)\n");
1493 goto out_free;
1494 }
1496 if (netif_msg_ifup(port))
1497 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1498 pr->send_cq->attr.act_nr_of_cqes,
1499 pr->recv_cq->attr.act_nr_of_cqes);
1501 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1502 if (!init_attr) {
1503 ret = -ENOMEM;
1504 pr_err("no mem for ehea_qp_init_attr\n");
1505 goto out_free;
1506 }
1508 init_attr->low_lat_rq1 = 1;
1509 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1510 init_attr->rq_count = 3;
1511 init_attr->qp_token = queue_token;
1512 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1513 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1514 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1515 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1516 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1517 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1518 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1519 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1520 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1521 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1522 init_attr->port_nr = port->logical_port_id;
1523 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1524 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1525 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1527 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1528 if (!pr->qp) {
1529 pr_err("create_qp failed\n");
1530 ret = -EIO;
1531 goto out_free;
1532 }
1534 if (netif_msg_ifup(port))
1535 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",
1536 init_attr->qp_nr,
1537 init_attr->act_nr_send_wqes,
1538 init_attr->act_nr_rwqes_rq1,
1539 init_attr->act_nr_rwqes_rq2,
1540 init_attr->act_nr_rwqes_rq3);
1542 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1544 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1545 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1546 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1547 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1548 if (ret)
1549 goto out_free;
1551 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1552 if (ehea_gen_smrs(pr) != 0) {
1553 ret = -EIO;
1554 goto out_free;
1555 }
1557 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1559 kfree(init_attr);
1561 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1563 ret = 0;
1564 goto out;
1566 out_free:
1567 kfree(init_attr);
1568 vfree(pr->sq_skba.arr);
1569 vfree(pr->rq1_skba.arr);
1570 vfree(pr->rq2_skba.arr);
1571 vfree(pr->rq3_skba.arr);
1572 ehea_destroy_qp(pr->qp);
1573 ehea_destroy_cq(pr->send_cq);
1574 ehea_destroy_cq(pr->recv_cq);
1575 ehea_destroy_eq(pr->eq);
1576 out:
1577 return ret;
1578 }
1580 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1581 {
1582 int ret, i;
1584 if (pr->qp)
1585 netif_napi_del(&pr->napi);
1587 ret = ehea_destroy_qp(pr->qp);
1589 if (!ret) {
1590 ehea_destroy_cq(pr->send_cq);
1591 ehea_destroy_cq(pr->recv_cq);
1592 ehea_destroy_eq(pr->eq);
1594 for (i = 0; i < pr->rq1_skba.len; i++)
1595 if (pr->rq1_skba.arr[i])
1596 dev_kfree_skb(pr->rq1_skba.arr[i]);
1598 for (i = 0; i < pr->rq2_skba.len; i++)
1599 if (pr->rq2_skba.arr[i])
1600 dev_kfree_skb(pr->rq2_skba.arr[i]);
1602 for (i = 0; i < pr->rq3_skba.len; i++)
1603 if (pr->rq3_skba.arr[i])
1604 dev_kfree_skb(pr->rq3_skba.arr[i]);
1606 for (i = 0; i < pr->sq_skba.len; i++)
1607 if (pr->sq_skba.arr[i])
1608 dev_kfree_skb(pr->sq_skba.arr[i]);
1610 vfree(pr->rq1_skba.arr);
1611 vfree(pr->rq2_skba.arr);
1612 vfree(pr->rq3_skba.arr);
1613 vfree(pr->sq_skba.arr);
1614 ret = ehea_rem_smrs(pr);
1615 }
1616 return ret;
1617 }
1619 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1620 u32 lkey)
1621 {
1622 int skb_data_size = skb_headlen(skb);
1623 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1624 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1625 unsigned int immediate_len = SWQE2_MAX_IMM;
1627 swqe->descriptors = 0;
1629 if (skb_is_gso(skb)) {
1630 swqe->tx_control |= EHEA_SWQE_TSO;
1631 swqe->mss = skb_shinfo(skb)->gso_size;
1632 /*
1633 * For TSO packets we only copy the headers into the
1634 * immediate area.
1635 */
1636 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1637 }
1639 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1640 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1641 swqe->immediate_data_length = immediate_len;
1643 if (skb_data_size > immediate_len) {
1644 sg1entry->l_key = lkey;
1645 sg1entry->len = skb_data_size - immediate_len;
1646 sg1entry->vaddr =
1647 ehea_map_vaddr(skb->data + immediate_len);
1648 swqe->descriptors++;
1649 }
1650 } else {
1651 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1652 swqe->immediate_data_length = skb_data_size;
1653 }
1654 }
1656 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1657 struct ehea_swqe *swqe, u32 lkey)
1658 {
1659 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1660 skb_frag_t *frag;
1661 int nfrags, sg1entry_contains_frag_data, i;
1663 nfrags = skb_shinfo(skb)->nr_frags;
1664 sg1entry = &swqe->u.immdata_desc.sg_entry;
1665 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1666 sg1entry_contains_frag_data = 0;
1668 write_swqe2_immediate(skb, swqe, lkey);
1670 /* write descriptors */
1671 if (nfrags > 0) {
1672 if (swqe->descriptors == 0) {
1673 /* sg1entry not yet used */
1674 frag = &skb_shinfo(skb)->frags[0];
1676 /* copy sg1entry data */
1677 sg1entry->l_key = lkey;
1678 sg1entry->len = skb_frag_size(frag);
1679 sg1entry->vaddr =
1680 ehea_map_vaddr(skb_frag_address(frag));
1681 swqe->descriptors++;
1682 sg1entry_contains_frag_data = 1;
1683 }
1685 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1687 frag = &skb_shinfo(skb)->frags[i];
1688 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1690 sgentry->l_key = lkey;
1691 sgentry->len = skb_frag_size(frag);
1692 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1693 swqe->descriptors++;
1694 }
1695 }
1696 }
1698 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1699 {
1700 int ret = 0;
1701 u64 hret;
1702 u8 reg_type;
1704 /* De/Register untagged packets */
1705 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1706 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1707 port->logical_port_id,
1708 reg_type, port->mac_addr, 0, hcallid);
1709 if (hret != H_SUCCESS) {
1710 pr_err("%sregistering bc address failed (tagged)\n",
1711 hcallid == H_REG_BCMC ? "" : "de");
1712 ret = -EIO;
1713 goto out_herr;
1714 }
1716 /* De/Register VLAN packets */
1717 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1718 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1719 port->logical_port_id,
1720 reg_type, port->mac_addr, 0, hcallid);
1721 if (hret != H_SUCCESS) {
1722 pr_err("%sregistering bc address failed (vlan)\n",
1723 hcallid == H_REG_BCMC ? "" : "de");
1724 ret = -EIO;
1725 }
1726 out_herr:
1727 return ret;
1728 }
1730 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1731 {
1732 struct ehea_port *port = netdev_priv(dev);
1733 struct sockaddr *mac_addr = sa;
1734 struct hcp_ehea_port_cb0 *cb0;
1735 int ret;
1736 u64 hret;
1738 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1739 ret = -EADDRNOTAVAIL;
1740 goto out;
1741 }
1743 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1744 if (!cb0) {
1745 pr_err("no mem for cb0\n");
1746 ret = -ENOMEM;
1747 goto out;
1748 }
1750 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1752 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1754 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1755 port->logical_port_id, H_PORT_CB0,
1756 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1757 if (hret != H_SUCCESS) {
1758 ret = -EIO;
1759 goto out_free;
1760 }
1762 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1764 /* Deregister old MAC in pHYP */
1765 if (port->state == EHEA_PORT_UP) {
1766 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1767 if (ret)
1768 goto out_upregs;
1769 }
1771 port->mac_addr = cb0->port_mac_addr << 16;
1773 /* Register new MAC in pHYP */
1774 if (port->state == EHEA_PORT_UP) {
1775 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1776 if (ret)
1777 goto out_upregs;
1778 }
1780 ret = 0;
1782 out_upregs:
1783 ehea_update_bcmc_registrations();
1784 out_free:
1785 free_page((unsigned long)cb0);
1786 out:
1787 return ret;
1788 }
1790 static void ehea_promiscuous_error(u64 hret, int enable)
1791 {
1792 if (hret == H_AUTHORITY)
1793 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1794 enable == 1 ? "en" : "dis");
1795 else
1796 pr_err("failed %sabling promiscuous mode\n",
1797 enable == 1 ? "en" : "dis");
1798 }
1800 static void ehea_promiscuous(struct net_device *dev, int enable)
1801 {
1802 struct ehea_port *port = netdev_priv(dev);
1803 struct hcp_ehea_port_cb7 *cb7;
1804 u64 hret;
1806 if (enable == port->promisc)
1807 return;
1809 cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1810 if (!cb7) {
1811 pr_err("no mem for cb7\n");
1812 goto out;
1813 }
1815 /* Modify Pxs_DUCQPN in CB7 */
1816 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1818 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1819 port->logical_port_id,
1820 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1821 if (hret) {
1822 ehea_promiscuous_error(hret, enable);
1823 goto out;
1824 }
1826 port->promisc = enable;
1827 out:
1828 free_page((unsigned long)cb7);
1829 }
1831 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1832 u32 hcallid)
1833 {
1834 u64 hret;
1835 u8 reg_type;
1837 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1838 if (mc_mac_addr == 0)
1839 reg_type |= EHEA_BCMC_SCOPE_ALL;
1841 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1842 port->logical_port_id,
1843 reg_type, mc_mac_addr, 0, hcallid);
1844 if (hret)
1845 goto out;
1847 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1848 if (mc_mac_addr == 0)
1849 reg_type |= EHEA_BCMC_SCOPE_ALL;
1851 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1852 port->logical_port_id,
1853 reg_type, mc_mac_addr, 0, hcallid);
1854 out:
1855 return hret;
1856 }
1858 static int ehea_drop_multicast_list(struct net_device *dev)
1859 {
1860 struct ehea_port *port = netdev_priv(dev);
1861 struct ehea_mc_list *mc_entry = port->mc_list;
1862 struct list_head *pos;
1863 struct list_head *temp;
1864 int ret = 0;
1865 u64 hret;
1867 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1868 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1870 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1871 H_DEREG_BCMC);
1872 if (hret) {
1873 pr_err("failed deregistering mcast MAC\n");
1874 ret = -EIO;
1875 }
1877 list_del(pos);
1878 kfree(mc_entry);
1879 }
1880 return ret;
1881 }
1883 static void ehea_allmulti(struct net_device *dev, int enable)
1884 {
1885 struct ehea_port *port = netdev_priv(dev);
1886 u64 hret;
1888 if (!port->allmulti) {
1889 if (enable) {
1890 /* Enable ALLMULTI */
1891 ehea_drop_multicast_list(dev);
1892 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1893 if (!hret)
1894 port->allmulti = 1;
1895 else
1896 netdev_err(dev,
1897 "failed enabling IFF_ALLMULTI\n");
1898 }
1899 } else {
1900 if (!enable) {
1901 /* Disable ALLMULTI */
1902 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1903 if (!hret)
1904 port->allmulti = 0;
1905 else
1906 netdev_err(dev,
1907 "failed disabling IFF_ALLMULTI\n");
1908 }
1909 }
1910 }
1912 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1913 {
1914 struct ehea_mc_list *ehea_mcl_entry;
1915 u64 hret;
1917 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1918 if (!ehea_mcl_entry)
1919 return;
1921 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1923 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1925 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1926 H_REG_BCMC);
1927 if (!hret)
1928 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1929 else {
1930 pr_err("failed registering mcast MAC\n");
1931 kfree(ehea_mcl_entry);
1932 }
1933 }
1935 static void ehea_set_multicast_list(struct net_device *dev)
1936 {
1937 struct ehea_port *port = netdev_priv(dev);
1938 struct netdev_hw_addr *ha;
1939 int ret;
1941 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1943 if (dev->flags & IFF_ALLMULTI) {
1944 ehea_allmulti(dev, 1);
1945 goto out;
1946 }
1947 ehea_allmulti(dev, 0);
1949 if (!netdev_mc_empty(dev)) {
1950 ret = ehea_drop_multicast_list(dev);
1951 if (ret) {
1952 /* Dropping the current multicast list failed.
1953 * Enabling ALL_MULTI is the best we can do.
1954 */
1955 ehea_allmulti(dev, 1);
1956 }
1958 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1959 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1960 port->adapter->max_mc_mac);
1961 goto out;
1962 }
1964 netdev_for_each_mc_addr(ha, dev)
1965 ehea_add_multicast_entry(port, ha->addr);
1967 }
1968 out:
1969 ehea_update_bcmc_registrations();
1970 }
1972 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1973 {
1974 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1976 if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1977 return;
1979 if (skb->ip_summed == CHECKSUM_PARTIAL)
1980 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1982 swqe->ip_start = skb_network_offset(skb);
1983 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1985 switch (ip_hdr(skb)->protocol) {
1986 case IPPROTO_UDP:
1987 if (skb->ip_summed == CHECKSUM_PARTIAL)
1988 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1990 swqe->tcp_offset = swqe->ip_end + 1 +
1991 offsetof(struct udphdr, check);
1992 break;
1994 case IPPROTO_TCP:
1995 if (skb->ip_summed == CHECKSUM_PARTIAL)
1996 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1998 swqe->tcp_offset = swqe->ip_end + 1 +
1999 offsetof(struct tcphdr, check);
2000 break;
2001 }
2002 }
2004 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2005 struct ehea_swqe *swqe, u32 lkey)
2006 {
2007 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2009 xmit_common(skb, swqe);
2011 write_swqe2_data(skb, dev, swqe, lkey);
2012 }
2014 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2015 struct ehea_swqe *swqe)
2016 {
2017 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2019 xmit_common(skb, swqe);
2021 if (!skb->data_len)
2022 skb_copy_from_linear_data(skb, imm_data, skb->len);
2023 else
2024 skb_copy_bits(skb, 0, imm_data, skb->len);
2026 swqe->immediate_data_length = skb->len;
2027 dev_consume_skb_any(skb);
2028 }
2030 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2031 {
2032 struct ehea_port *port = netdev_priv(dev);
2033 struct ehea_swqe *swqe;
2034 u32 lkey;
2035 int swqe_index;
2036 struct ehea_port_res *pr;
2037 struct netdev_queue *txq;
2039 pr = &port->port_res[skb_get_queue_mapping(skb)];
2040 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2042 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2043 memset(swqe, 0, SWQE_HEADER_SIZE);
2044 atomic_dec(&pr->swqe_avail);
2046 if (skb_vlan_tag_present(skb)) {
2047 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2048 swqe->vlan_tag = skb_vlan_tag_get(skb);
2049 }
2051 pr->tx_packets++;
2052 pr->tx_bytes += skb->len;
2054 if (skb->len <= SWQE3_MAX_IMM) {
2055 u32 sig_iv = port->sig_comp_iv;
2056 u32 swqe_num = pr->swqe_id_counter;
2057 ehea_xmit3(skb, dev, swqe);
2058 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2059 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2060 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2061 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2062 sig_iv);
2063 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2064 pr->swqe_ll_count = 0;
2065 } else
2066 pr->swqe_ll_count += 1;
2067 } else {
2068 swqe->wr_id =
2069 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2070 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2071 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2072 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2073 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2075 pr->sq_skba.index++;
2076 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2078 lkey = pr->send_mr.lkey;
2079 ehea_xmit2(skb, dev, swqe, lkey);
2080 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2081 }
2082 pr->swqe_id_counter += 1;
2084 netif_info(port, tx_queued, dev,
2085 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2086 if (netif_msg_tx_queued(port))
2087 ehea_dump(swqe, 512, "swqe");
2089 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2090 netif_tx_stop_queue(txq);
2091 swqe->tx_control |= EHEA_SWQE_PURGE;
2092 }
2094 ehea_post_swqe(pr->qp, swqe);
2096 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2097 pr->p_stats.queue_stopped++;
2098 netif_tx_stop_queue(txq);
2099 }
2101 return NETDEV_TX_OK;
2102 }
2104 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2105 {
2106 struct ehea_port *port = netdev_priv(dev);
2107 struct ehea_adapter *adapter = port->adapter;
2108 struct hcp_ehea_port_cb1 *cb1;
2109 int index;
2110 u64 hret;
2111 int err = 0;
2113 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2114 if (!cb1) {
2115 pr_err("no mem for cb1\n");
2116 err = -ENOMEM;
2117 goto out;
2118 }
2120 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2121 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2122 if (hret != H_SUCCESS) {
2123 pr_err("query_ehea_port failed\n");
2124 err = -EINVAL;
2125 goto out;
2126 }
2128 index = (vid / 64);
2129 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2131 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2132 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2133 if (hret != H_SUCCESS) {
2134 pr_err("modify_ehea_port failed\n");
2135 err = -EINVAL;
2136 }
2137 out:
2138 free_page((unsigned long)cb1);
2139 return err;
2140 }
2142 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2143 {
2144 struct ehea_port *port = netdev_priv(dev);
2145 struct ehea_adapter *adapter = port->adapter;
2146 struct hcp_ehea_port_cb1 *cb1;
2147 int index;
2148 u64 hret;
2149 int err = 0;
2151 cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2152 if (!cb1) {
2153 pr_err("no mem for cb1\n");
2154 err = -ENOMEM;
2155 goto out;
2156 }
2158 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2159 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2160 if (hret != H_SUCCESS) {
2161 pr_err("query_ehea_port failed\n");
2162 err = -EINVAL;
2163 goto out;
2164 }
2166 index = (vid / 64);
2167 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2169 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2170 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2171 if (hret != H_SUCCESS) {
2172 pr_err("modify_ehea_port failed\n");
2173 err = -EINVAL;
2174 }
2175 out:
2176 free_page((unsigned long)cb1);
2177 return err;
2178 }
2180 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2181 {
2182 int ret = -EIO;
2183 u64 hret;
2184 u16 dummy16 = 0;
2185 u64 dummy64 = 0;
2186 struct hcp_modify_qp_cb0 *cb0;
2188 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2189 if (!cb0) {
2190 ret = -ENOMEM;
2191 goto out;
2192 }
2194 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2195 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2196 if (hret != H_SUCCESS) {
2197 pr_err("query_ehea_qp failed (1)\n");
2198 goto out;
2199 }
2201 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2202 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2203 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2204 &dummy64, &dummy64, &dummy16, &dummy16);
2205 if (hret != H_SUCCESS) {
2206 pr_err("modify_ehea_qp failed (1)\n");
2207 goto out;
2208 }
2210 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2211 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2212 if (hret != H_SUCCESS) {
2213 pr_err("query_ehea_qp failed (2)\n");
2214 goto out;
2215 }
2217 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2218 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2219 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2220 &dummy64, &dummy64, &dummy16, &dummy16);
2221 if (hret != H_SUCCESS) {
2222 pr_err("modify_ehea_qp failed (2)\n");
2223 goto out;
2224 }
2226 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2227 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2228 if (hret != H_SUCCESS) {
2229 pr_err("query_ehea_qp failed (3)\n");
2230 goto out;
2231 }
2233 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2234 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2235 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2236 &dummy64, &dummy64, &dummy16, &dummy16);
2237 if (hret != H_SUCCESS) {
2238 pr_err("modify_ehea_qp failed (3)\n");
2239 goto out;
2240 }
2242 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2243 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2244 if (hret != H_SUCCESS) {
2245 pr_err("query_ehea_qp failed (4)\n");
2246 goto out;
2247 }
2249 ret = 0;
2250 out:
2251 free_page((unsigned long)cb0);
2252 return ret;
2253 }
2255 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2256 {
2257 int ret, i;
2258 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2259 enum ehea_eq_type eq_type = EHEA_EQ;
2261 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2262 EHEA_MAX_ENTRIES_EQ, 1);
2263 if (!port->qp_eq) {
2264 ret = -EINVAL;
2265 pr_err("ehea_create_eq failed (qp_eq)\n");
2266 goto out_kill_eq;
2267 }
2269 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2270 pr_cfg.max_entries_scq = sq_entries * 2;
2271 pr_cfg.max_entries_sq = sq_entries;
2272 pr_cfg.max_entries_rq1 = rq1_entries;
2273 pr_cfg.max_entries_rq2 = rq2_entries;
2274 pr_cfg.max_entries_rq3 = rq3_entries;
2276 pr_cfg_small_rx.max_entries_rcq = 1;
2277 pr_cfg_small_rx.max_entries_scq = sq_entries;
2278 pr_cfg_small_rx.max_entries_sq = sq_entries;
2279 pr_cfg_small_rx.max_entries_rq1 = 1;
2280 pr_cfg_small_rx.max_entries_rq2 = 1;
2281 pr_cfg_small_rx.max_entries_rq3 = 1;
2283 for (i = 0; i < def_qps; i++) {
2284 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2285 if (ret)
2286 goto out_clean_pr;
2287 }
2288 for (i = def_qps; i < def_qps; i++) {
2289 ret = ehea_init_port_res(port, &port->port_res[i],
2290 &pr_cfg_small_rx, i);
2291 if (ret)
2292 goto out_clean_pr;
2293 }
2295 return 0;
2297 out_clean_pr:
2298 while (--i >= 0)
2299 ehea_clean_portres(port, &port->port_res[i]);
2301 out_kill_eq:
2302 ehea_destroy_eq(port->qp_eq);
2303 return ret;
2304 }
2306 static int ehea_clean_all_portres(struct ehea_port *port)
2307 {
2308 int ret = 0;
2309 int i;
2311 for (i = 0; i < port->num_def_qps; i++)
2312 ret |= ehea_clean_portres(port, &port->port_res[i]);
2314 ret |= ehea_destroy_eq(port->qp_eq);
2316 return ret;
2317 }
2319 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2320 {
2321 if (adapter->active_ports)
2322 return;
2324 ehea_rem_mr(&adapter->mr);
2325 }
2327 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2328 {
2329 if (adapter->active_ports)
2330 return 0;
2332 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2333 }
2335 static int ehea_up(struct net_device *dev)
2336 {
2337 int ret, i;
2338 struct ehea_port *port = netdev_priv(dev);
2340 if (port->state == EHEA_PORT_UP)
2341 return 0;
2343 ret = ehea_port_res_setup(port, port->num_def_qps);
2344 if (ret) {
2345 netdev_err(dev, "port_res_failed\n");
2346 goto out;
2347 }
2349 /* Set default QP for this port */
2350 ret = ehea_configure_port(port);
2351 if (ret) {
2352 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2353 goto out_clean_pr;
2354 }
2356 ret = ehea_reg_interrupts(dev);
2357 if (ret) {
2358 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2359 goto out_clean_pr;
2360 }
2362 for (i = 0; i < port->num_def_qps; i++) {
2363 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2364 if (ret) {
2365 netdev_err(dev, "activate_qp failed\n");
2366 goto out_free_irqs;
2367 }
2368 }
2370 for (i = 0; i < port->num_def_qps; i++) {
2371 ret = ehea_fill_port_res(&port->port_res[i]);
2372 if (ret) {
2373 netdev_err(dev, "out_free_irqs\n");
2374 goto out_free_irqs;
2375 }
2376 }
2378 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2379 if (ret) {
2380 ret = -EIO;
2381 goto out_free_irqs;
2382 }
2384 port->state = EHEA_PORT_UP;
2386 ret = 0;
2387 goto out;
2389 out_free_irqs:
2390 ehea_free_interrupts(dev);
2392 out_clean_pr:
2393 ehea_clean_all_portres(port);
2394 out:
2395 if (ret)
2396 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2398 ehea_update_bcmc_registrations();
2399 ehea_update_firmware_handles();
2401 return ret;
2402 }
2404 static void port_napi_disable(struct ehea_port *port)
2405 {
2406 int i;
2408 for (i = 0; i < port->num_def_qps; i++)
2409 napi_disable(&port->port_res[i].napi);
2410 }
2412 static void port_napi_enable(struct ehea_port *port)
2413 {
2414 int i;
2416 for (i = 0; i < port->num_def_qps; i++)
2417 napi_enable(&port->port_res[i].napi);
2418 }
2420 static int ehea_open(struct net_device *dev)
2421 {
2422 int ret;
2423 struct ehea_port *port = netdev_priv(dev);
2425 mutex_lock(&port->port_lock);
2427 netif_info(port, ifup, dev, "enabling port\n");
2429 netif_carrier_off(dev);
2431 ret = ehea_up(dev);
2432 if (!ret) {
2433 port_napi_enable(port);
2434 netif_tx_start_all_queues(dev);
2435 }
2437 mutex_unlock(&port->port_lock);
2438 schedule_delayed_work(&port->stats_work,
2439 round_jiffies_relative(msecs_to_jiffies(1000)));
2441 return ret;
2442 }
2444 static int ehea_down(struct net_device *dev)
2445 {
2446 int ret;
2447 struct ehea_port *port = netdev_priv(dev);
2449 if (port->state == EHEA_PORT_DOWN)
2450 return 0;
2452 ehea_drop_multicast_list(dev);
2453 ehea_allmulti(dev, 0);
2454 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2456 ehea_free_interrupts(dev);
2458 port->state = EHEA_PORT_DOWN;
2460 ehea_update_bcmc_registrations();
2462 ret = ehea_clean_all_portres(port);
2463 if (ret)
2464 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2466 ehea_update_firmware_handles();
2468 return ret;
2469 }
2471 static int ehea_stop(struct net_device *dev)
2472 {
2473 int ret;
2474 struct ehea_port *port = netdev_priv(dev);
2476 netif_info(port, ifdown, dev, "disabling port\n");
2478 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2479 cancel_work_sync(&port->reset_task);
2480 cancel_delayed_work_sync(&port->stats_work);
2481 mutex_lock(&port->port_lock);
2482 netif_tx_stop_all_queues(dev);
2483 port_napi_disable(port);
2484 ret = ehea_down(dev);
2485 mutex_unlock(&port->port_lock);
2486 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2487 return ret;
2488 }
2490 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2491 {
2492 struct ehea_qp qp = *orig_qp;
2493 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2494 struct ehea_swqe *swqe;
2495 int wqe_index;
2496 int i;
2498 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2499 swqe = ehea_get_swqe(&qp, &wqe_index);
2500 swqe->tx_control |= EHEA_SWQE_PURGE;
2501 }
2502 }
2504 static void ehea_flush_sq(struct ehea_port *port)
2505 {
2506 int i;
2508 for (i = 0; i < port->num_def_qps; i++) {
2509 struct ehea_port_res *pr = &port->port_res[i];
2510 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2511 int ret;
2513 ret = wait_event_timeout(port->swqe_avail_wq,
2514 atomic_read(&pr->swqe_avail) >= swqe_max,
2515 msecs_to_jiffies(100));
2517 if (!ret) {
2518 pr_err("WARNING: sq not flushed completely\n");
2519 break;
2520 }
2521 }
2522 }
2524 static int ehea_stop_qps(struct net_device *dev)
2525 {
2526 struct ehea_port *port = netdev_priv(dev);
2527 struct ehea_adapter *adapter = port->adapter;
2528 struct hcp_modify_qp_cb0 *cb0;
2529 int ret = -EIO;
2530 int dret;
2531 int i;
2532 u64 hret;
2533 u64 dummy64 = 0;
2534 u16 dummy16 = 0;
2536 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2537 if (!cb0) {
2538 ret = -ENOMEM;
2539 goto out;
2540 }
2542 for (i = 0; i < (port->num_def_qps); i++) {
2543 struct ehea_port_res *pr = &port->port_res[i];
2544 struct ehea_qp *qp = pr->qp;
2546 /* Purge send queue */
2547 ehea_purge_sq(qp);
2549 /* Disable queue pair */
2550 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2551 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2552 cb0);
2553 if (hret != H_SUCCESS) {
2554 pr_err("query_ehea_qp failed (1)\n");
2555 goto out;
2556 }
2558 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2559 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2561 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2562 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2563 1), cb0, &dummy64,
2564 &dummy64, &dummy16, &dummy16);
2565 if (hret != H_SUCCESS) {
2566 pr_err("modify_ehea_qp failed (1)\n");
2567 goto out;
2568 }
2570 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2571 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2572 cb0);
2573 if (hret != H_SUCCESS) {
2574 pr_err("query_ehea_qp failed (2)\n");
2575 goto out;
2576 }
2578 /* deregister shared memory regions */
2579 dret = ehea_rem_smrs(pr);
2580 if (dret) {
2581 pr_err("unreg shared memory region failed\n");
2582 goto out;
2583 }
2584 }
2586 ret = 0;
2587 out:
2588 free_page((unsigned long)cb0);
2590 return ret;
2591 }
2593 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2594 {
2595 struct ehea_qp qp = *orig_qp;
2596 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2597 struct ehea_rwqe *rwqe;
2598 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2599 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2600 struct sk_buff *skb;
2601 u32 lkey = pr->recv_mr.lkey;
2604 int i;
2605 int index;
2607 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2608 rwqe = ehea_get_next_rwqe(&qp, 2);
2609 rwqe->sg_list[0].l_key = lkey;
2610 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2611 skb = skba_rq2[index];
2612 if (skb)
2613 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2614 }
2616 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2617 rwqe = ehea_get_next_rwqe(&qp, 3);
2618 rwqe->sg_list[0].l_key = lkey;
2619 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2620 skb = skba_rq3[index];
2621 if (skb)
2622 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2623 }
2624 }
2626 static int ehea_restart_qps(struct net_device *dev)
2627 {
2628 struct ehea_port *port = netdev_priv(dev);
2629 struct ehea_adapter *adapter = port->adapter;
2630 int ret = 0;
2631 int i;
2633 struct hcp_modify_qp_cb0 *cb0;
2634 u64 hret;
2635 u64 dummy64 = 0;
2636 u16 dummy16 = 0;
2638 cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2639 if (!cb0) {
2640 ret = -ENOMEM;
2641 goto out;
2642 }
2644 for (i = 0; i < (port->num_def_qps); i++) {
2645 struct ehea_port_res *pr = &port->port_res[i];
2646 struct ehea_qp *qp = pr->qp;
2648 ret = ehea_gen_smrs(pr);
2649 if (ret) {
2650 netdev_err(dev, "creation of shared memory regions failed\n");
2651 goto out;
2652 }
2654 ehea_update_rqs(qp, pr);
2656 /* Enable queue pair */
2657 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2658 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2659 cb0);
2660 if (hret != H_SUCCESS) {
2661 netdev_err(dev, "query_ehea_qp failed (1)\n");
2662 goto out;
2663 }
2665 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2666 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2668 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2669 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2670 1), cb0, &dummy64,
2671 &dummy64, &dummy16, &dummy16);
2672 if (hret != H_SUCCESS) {
2673 netdev_err(dev, "modify_ehea_qp failed (1)\n");
2674 goto out;
2675 }
2677 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2678 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2679 cb0);
2680 if (hret != H_SUCCESS) {
2681 netdev_err(dev, "query_ehea_qp failed (2)\n");
2682 goto out;
2683 }
2685 /* refill entire queue */
2686 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2687 ehea_refill_rq2(pr, 0);
2688 ehea_refill_rq3(pr, 0);
2689 }
2690 out:
2691 free_page((unsigned long)cb0);
2693 return ret;
2694 }
2696 static void ehea_reset_port(struct work_struct *work)
2697 {
2698 int ret;
2699 struct ehea_port *port =
2700 container_of(work, struct ehea_port, reset_task);
2701 struct net_device *dev = port->netdev;
2703 mutex_lock(&dlpar_mem_lock);
2704 port->resets++;
2705 mutex_lock(&port->port_lock);
2706 netif_tx_disable(dev);
2708 port_napi_disable(port);
2710 ehea_down(dev);
2712 ret = ehea_up(dev);
2713 if (ret)
2714 goto out;
2716 ehea_set_multicast_list(dev);
2718 netif_info(port, timer, dev, "reset successful\n");
2720 port_napi_enable(port);
2722 netif_tx_wake_all_queues(dev);
2723 out:
2724 mutex_unlock(&port->port_lock);
2725 mutex_unlock(&dlpar_mem_lock);
2726 }
2728 static void ehea_rereg_mrs(void)
2729 {
2730 int ret, i;
2731 struct ehea_adapter *adapter;
2733 pr_info("LPAR memory changed - re-initializing driver\n");
2735 list_for_each_entry(adapter, &adapter_list, list)
2736 if (adapter->active_ports) {
2737 /* Shutdown all ports */
2738 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2739 struct ehea_port *port = adapter->port[i];
2740 struct net_device *dev;
2742 if (!port)
2743 continue;
2745 dev = port->netdev;
2747 if (dev->flags & IFF_UP) {
2748 mutex_lock(&port->port_lock);
2749 netif_tx_disable(dev);
2750 ehea_flush_sq(port);
2751 ret = ehea_stop_qps(dev);
2752 if (ret) {
2753 mutex_unlock(&port->port_lock);
2754 goto out;
2755 }
2756 port_napi_disable(port);
2757 mutex_unlock(&port->port_lock);
2758 }
2759 reset_sq_restart_flag(port);
2760 }
2762 /* Unregister old memory region */
2763 ret = ehea_rem_mr(&adapter->mr);
2764 if (ret) {
2765 pr_err("unregister MR failed - driver inoperable!\n");
2766 goto out;
2767 }
2768 }
2770 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2772 list_for_each_entry(adapter, &adapter_list, list)
2773 if (adapter->active_ports) {
2774 /* Register new memory region */
2775 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2776 if (ret) {
2777 pr_err("register MR failed - driver inoperable!\n");
2778 goto out;
2779 }
2781 /* Restart all ports */
2782 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2783 struct ehea_port *port = adapter->port[i];
2785 if (port) {
2786 struct net_device *dev = port->netdev;
2788 if (dev->flags & IFF_UP) {
2789 mutex_lock(&port->port_lock);
2790 ret = ehea_restart_qps(dev);
2791 if (!ret) {
2792 check_sqs(port);
2793 port_napi_enable(port);
2794 netif_tx_wake_all_queues(dev);
2795 } else {
2796 netdev_err(dev, "Unable to restart QPS\n");
2797 }
2798 mutex_unlock(&port->port_lock);
2799 }
2800 }
2801 }
2802 }
2803 pr_info("re-initializing driver complete\n");
2804 out:
2805 return;
2806 }
2808 static void ehea_tx_watchdog(struct net_device *dev)
2809 {
2810 struct ehea_port *port = netdev_priv(dev);
2812 if (netif_carrier_ok(dev) &&
2813 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2814 ehea_schedule_port_reset(port);
2815 }
2817 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2818 {
2819 struct hcp_query_ehea *cb;
2820 u64 hret;
2821 int ret;
2823 cb = (void *)get_zeroed_page(GFP_KERNEL);
2824 if (!cb) {
2825 ret = -ENOMEM;
2826 goto out;
2827 }
2829 hret = ehea_h_query_ehea(adapter->handle, cb);
2831 if (hret != H_SUCCESS) {
2832 ret = -EIO;
2833 goto out_herr;
2834 }
2836 adapter->max_mc_mac = cb->max_mc_mac - 1;
2837 ret = 0;
2839 out_herr:
2840 free_page((unsigned long)cb);
2841 out:
2842 return ret;
2843 }
2845 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2846 {
2847 struct hcp_ehea_port_cb4 *cb4;
2848 u64 hret;
2849 int ret = 0;
2851 *jumbo = 0;
2853 /* (Try to) enable *jumbo frames */
2854 cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2855 if (!cb4) {
2856 pr_err("no mem for cb4\n");
2857 ret = -ENOMEM;
2858 goto out;
2859 } else {
2860 hret = ehea_h_query_ehea_port(port->adapter->handle,
2861 port->logical_port_id,
2862 H_PORT_CB4,
2863 H_PORT_CB4_JUMBO, cb4);
2864 if (hret == H_SUCCESS) {
2865 if (cb4->jumbo_frame)
2866 *jumbo = 1;
2867 else {
2868 cb4->jumbo_frame = 1;
2869 hret = ehea_h_modify_ehea_port(port->adapter->
2870 handle,
2871 port->
2872 logical_port_id,
2873 H_PORT_CB4,
2874 H_PORT_CB4_JUMBO,
2875 cb4);
2876 if (hret == H_SUCCESS)
2877 *jumbo = 1;
2878 }
2879 } else
2880 ret = -EINVAL;
2882 free_page((unsigned long)cb4);
2883 }
2884 out:
2885 return ret;
2886 }
2888 static ssize_t ehea_show_port_id(struct device *dev,
2889 struct device_attribute *attr, char *buf)
2890 {
2891 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2892 return sprintf(buf, "%d", port->logical_port_id);
2893 }
2895 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2897 static void logical_port_release(struct device *dev)
2898 {
2899 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2900 of_node_put(port->ofdev.dev.of_node);
2901 }
2903 static struct device *ehea_register_port(struct ehea_port *port,
2904 struct device_node *dn)
2905 {
2906 int ret;
2908 port->ofdev.dev.of_node = of_node_get(dn);
2909 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2910 port->ofdev.dev.bus = &ibmebus_bus_type;
2912 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2913 port->ofdev.dev.release = logical_port_release;
2915 ret = of_device_register(&port->ofdev);
2916 if (ret) {
2917 pr_err("failed to register device. ret=%d\n", ret);
2918 goto out;
2919 }
2921 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2922 if (ret) {
2923 pr_err("failed to register attributes, ret=%d\n", ret);
2924 goto out_unreg_of_dev;
2925 }
2927 return &port->ofdev.dev;
2929 out_unreg_of_dev:
2930 of_device_unregister(&port->ofdev);
2931 out:
2932 return NULL;
2933 }
2935 static void ehea_unregister_port(struct ehea_port *port)
2936 {
2937 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2938 of_device_unregister(&port->ofdev);
2939 }
2941 static const struct net_device_ops ehea_netdev_ops = {
2942 .ndo_open = ehea_open,
2943 .ndo_stop = ehea_stop,
2944 .ndo_start_xmit = ehea_start_xmit,
2945 .ndo_get_stats64 = ehea_get_stats64,
2946 .ndo_set_mac_address = ehea_set_mac_addr,
2947 .ndo_validate_addr = eth_validate_addr,
2948 .ndo_set_rx_mode = ehea_set_multicast_list,
2949 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
2950 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
2951 .ndo_tx_timeout = ehea_tx_watchdog,
2952 };
2954 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2955 u32 logical_port_id,
2956 struct device_node *dn)
2957 {
2958 int ret;
2959 struct net_device *dev;
2960 struct ehea_port *port;
2961 struct device *port_dev;
2962 int jumbo;
2964 /* allocate memory for the port structures */
2965 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2967 if (!dev) {
2968 ret = -ENOMEM;
2969 goto out_err;
2970 }
2972 port = netdev_priv(dev);
2974 mutex_init(&port->port_lock);
2975 port->state = EHEA_PORT_DOWN;
2976 port->sig_comp_iv = sq_entries / 10;
2978 port->adapter = adapter;
2979 port->netdev = dev;
2980 port->logical_port_id = logical_port_id;
2982 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2984 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2985 if (!port->mc_list) {
2986 ret = -ENOMEM;
2987 goto out_free_ethdev;
2988 }
2990 INIT_LIST_HEAD(&port->mc_list->list);
2992 ret = ehea_sense_port_attr(port);
2993 if (ret)
2994 goto out_free_mc_list;
2996 netif_set_real_num_rx_queues(dev, port->num_def_qps);
2997 netif_set_real_num_tx_queues(dev, port->num_def_qps);
2999 port_dev = ehea_register_port(port, dn);
3000 if (!port_dev)
3001 goto out_free_mc_list;
3003 SET_NETDEV_DEV(dev, port_dev);
3005 /* initialize net_device structure */
3006 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3008 dev->netdev_ops = &ehea_netdev_ops;
3009 ehea_set_ethtool_ops(dev);
3011 dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3012 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3013 dev->features = NETIF_F_SG | NETIF_F_TSO |
3014 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3015 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3016 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3017 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3018 NETIF_F_IP_CSUM;
3019 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3021 /* MTU range: 68 - 9022 */
3022 dev->min_mtu = ETH_MIN_MTU;
3023 dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3025 INIT_WORK(&port->reset_task, ehea_reset_port);
3026 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3028 init_waitqueue_head(&port->swqe_avail_wq);
3029 init_waitqueue_head(&port->restart_wq);
3031 ret = register_netdev(dev);
3032 if (ret) {
3033 pr_err("register_netdev failed. ret=%d\n", ret);
3034 goto out_unreg_port;
3035 }
3037 ret = ehea_get_jumboframe_status(port, &jumbo);
3038 if (ret)
3039 netdev_err(dev, "failed determining jumbo frame status\n");
3041 netdev_info(dev, "Jumbo frames are %sabled\n",
3042 jumbo == 1 ? "en" : "dis");
3044 adapter->active_ports++;
3046 return port;
3048 out_unreg_port:
3049 ehea_unregister_port(port);
3051 out_free_mc_list:
3052 kfree(port->mc_list);
3054 out_free_ethdev:
3055 free_netdev(dev);
3057 out_err:
3058 pr_err("setting up logical port with id=%d failed, ret=%d\n",
3059 logical_port_id, ret);
3060 return NULL;
3061 }
3063 static void ehea_shutdown_single_port(struct ehea_port *port)
3064 {
3065 struct ehea_adapter *adapter = port->adapter;
3067 cancel_work_sync(&port->reset_task);
3068 cancel_delayed_work_sync(&port->stats_work);
3069 unregister_netdev(port->netdev);
3070 ehea_unregister_port(port);
3071 kfree(port->mc_list);
3072 free_netdev(port->netdev);
3073 adapter->active_ports--;
3074 }
3076 static int ehea_setup_ports(struct ehea_adapter *adapter)
3077 {
3078 struct device_node *lhea_dn;
3079 struct device_node *eth_dn = NULL;
3081 const u32 *dn_log_port_id;
3082 int i = 0;
3084 lhea_dn = adapter->ofdev->dev.of_node;
3085 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3087 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3088 NULL);
3089 if (!dn_log_port_id) {
3090 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3091 continue;
3092 }
3094 if (ehea_add_adapter_mr(adapter)) {
3095 pr_err("creating MR failed\n");
3096 of_node_put(eth_dn);
3097 return -EIO;
3098 }
3100 adapter->port[i] = ehea_setup_single_port(adapter,
3101 *dn_log_port_id,
3102 eth_dn);
3103 if (adapter->port[i])
3104 netdev_info(adapter->port[i]->netdev,
3105 "logical port id #%d\n", *dn_log_port_id);
3106 else
3107 ehea_remove_adapter_mr(adapter);
3109 i++;
3110 }
3111 return 0;
3112 }
3114 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3115 u32 logical_port_id)
3116 {
3117 struct device_node *lhea_dn;
3118 struct device_node *eth_dn = NULL;
3119 const u32 *dn_log_port_id;
3121 lhea_dn = adapter->ofdev->dev.of_node;
3122 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3124 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3125 NULL);
3126 if (dn_log_port_id)
3127 if (*dn_log_port_id == logical_port_id)
3128 return eth_dn;
3129 }
3131 return NULL;
3132 }
3134 static ssize_t ehea_probe_port(struct device *dev,
3135 struct device_attribute *attr,
3136 const char *buf, size_t count)
3137 {
3138 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3139 struct ehea_port *port;
3140 struct device_node *eth_dn = NULL;
3141 int i;
3143 u32 logical_port_id;
3145 sscanf(buf, "%d", &logical_port_id);
3147 port = ehea_get_port(adapter, logical_port_id);
3149 if (port) {
3150 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3151 logical_port_id);
3152 return -EINVAL;
3153 }
3155 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3157 if (!eth_dn) {
3158 pr_info("no logical port with id %d found\n", logical_port_id);
3159 return -EINVAL;
3160 }
3162 if (ehea_add_adapter_mr(adapter)) {
3163 pr_err("creating MR failed\n");
3164 return -EIO;
3165 }
3167 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3169 of_node_put(eth_dn);
3171 if (port) {
3172 for (i = 0; i < EHEA_MAX_PORTS; i++)
3173 if (!adapter->port[i]) {
3174 adapter->port[i] = port;
3175 break;
3176 }
3178 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3179 logical_port_id);
3180 } else {
3181 ehea_remove_adapter_mr(adapter);
3182 return -EIO;
3183 }
3185 return (ssize_t) count;
3186 }
3188 static ssize_t ehea_remove_port(struct device *dev,
3189 struct device_attribute *attr,
3190 const char *buf, size_t count)
3191 {
3192 struct ehea_adapter *adapter = dev_get_drvdata(dev);
3193 struct ehea_port *port;
3194 int i;
3195 u32 logical_port_id;
3197 sscanf(buf, "%d", &logical_port_id);
3199 port = ehea_get_port(adapter, logical_port_id);
3201 if (port) {
3202 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3203 logical_port_id);
3205 ehea_shutdown_single_port(port);
3207 for (i = 0; i < EHEA_MAX_PORTS; i++)
3208 if (adapter->port[i] == port) {
3209 adapter->port[i] = NULL;
3210 break;
3211 }
3212 } else {
3213 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3214 logical_port_id);
3215 return -EINVAL;
3216 }
3218 ehea_remove_adapter_mr(adapter);
3220 return (ssize_t) count;
3221 }
3223 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3224 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3226 static int ehea_create_device_sysfs(struct platform_device *dev)
3227 {
3228 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3229 if (ret)
3230 goto out;
3232 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3233 out:
3234 return ret;
3235 }
3237 static void ehea_remove_device_sysfs(struct platform_device *dev)
3238 {
3239 device_remove_file(&dev->dev, &dev_attr_probe_port);
3240 device_remove_file(&dev->dev, &dev_attr_remove_port);
3241 }
3243 static int ehea_reboot_notifier(struct notifier_block *nb,
3244 unsigned long action, void *unused)
3245 {
3246 if (action == SYS_RESTART) {
3247 pr_info("Reboot: freeing all eHEA resources\n");
3248 ibmebus_unregister_driver(&ehea_driver);
3249 }
3250 return NOTIFY_DONE;
3251 }
3253 static struct notifier_block ehea_reboot_nb = {
3254 .notifier_call = ehea_reboot_notifier,
3255 };
3257 static int ehea_mem_notifier(struct notifier_block *nb,
3258 unsigned long action, void *data)
3259 {
3260 int ret = NOTIFY_BAD;
3261 struct memory_notify *arg = data;
3263 mutex_lock(&dlpar_mem_lock);
3265 switch (action) {
3266 case MEM_CANCEL_OFFLINE:
3267 pr_info("memory offlining canceled");
3268 /* Fall through: re-add canceled memory block */
3270 case MEM_ONLINE:
3271 pr_info("memory is going online");
3272 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3273 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3274 goto out_unlock;
3275 ehea_rereg_mrs();
3276 break;
3278 case MEM_GOING_OFFLINE:
3279 pr_info("memory is going offline");
3280 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3281 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3282 goto out_unlock;
3283 ehea_rereg_mrs();
3284 break;
3286 default:
3287 break;
3288 }
3290 ehea_update_firmware_handles();
3291 ret = NOTIFY_OK;
3293 out_unlock:
3294 mutex_unlock(&dlpar_mem_lock);
3295 return ret;
3296 }
3298 static struct notifier_block ehea_mem_nb = {
3299 .notifier_call = ehea_mem_notifier,
3300 };
3302 static void ehea_crash_handler(void)
3303 {
3304 int i;
3306 if (ehea_fw_handles.arr)
3307 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3308 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3309 ehea_fw_handles.arr[i].fwh,
3310 FORCE_FREE);
3312 if (ehea_bcmc_regs.arr)
3313 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3314 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3315 ehea_bcmc_regs.arr[i].port_id,
3316 ehea_bcmc_regs.arr[i].reg_type,
3317 ehea_bcmc_regs.arr[i].macaddr,
3318 0, H_DEREG_BCMC);
3319 }
3321 static atomic_t ehea_memory_hooks_registered;
3323 /* Register memory hooks on probe of first adapter */
3324 static int ehea_register_memory_hooks(void)
3325 {
3326 int ret = 0;
3328 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3329 return 0;
3331 ret = ehea_create_busmap();
3332 if (ret) {
3333 pr_info("ehea_create_busmap failed\n");
3334 goto out;
3335 }
3337 ret = register_reboot_notifier(&ehea_reboot_nb);
3338 if (ret) {
3339 pr_info("register_reboot_notifier failed\n");
3340 goto out;
3341 }
3343 ret = register_memory_notifier(&ehea_mem_nb);
3344 if (ret) {
3345 pr_info("register_memory_notifier failed\n");
3346 goto out2;
3347 }
3349 ret = crash_shutdown_register(ehea_crash_handler);
3350 if (ret) {
3351 pr_info("crash_shutdown_register failed\n");
3352 goto out3;
3353 }
3355 return 0;
3357 out3:
3358 unregister_memory_notifier(&ehea_mem_nb);
3359 out2:
3360 unregister_reboot_notifier(&ehea_reboot_nb);
3361 out:
3362 atomic_dec(&ehea_memory_hooks_registered);
3363 return ret;
3364 }
3366 static void ehea_unregister_memory_hooks(void)
3367 {
3368 /* Only remove the hooks if we've registered them */
3369 if (atomic_read(&ehea_memory_hooks_registered) == 0)
3370 return;
3372 unregister_reboot_notifier(&ehea_reboot_nb);
3373 if (crash_shutdown_unregister(ehea_crash_handler))
3374 pr_info("failed unregistering crash handler\n");
3375 unregister_memory_notifier(&ehea_mem_nb);
3376 }
3378 static int ehea_probe_adapter(struct platform_device *dev)
3379 {
3380 struct ehea_adapter *adapter;
3381 const u64 *adapter_handle;
3382 int ret;
3383 int i;
3385 ret = ehea_register_memory_hooks();
3386 if (ret)
3387 return ret;
3389 if (!dev || !dev->dev.of_node) {
3390 pr_err("Invalid ibmebus device probed\n");
3391 return -EINVAL;
3392 }
3394 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3395 if (!adapter) {
3396 ret = -ENOMEM;
3397 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3398 goto out;
3399 }
3401 list_add(&adapter->list, &adapter_list);
3403 adapter->ofdev = dev;
3405 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3406 NULL);
3407 if (adapter_handle)
3408 adapter->handle = *adapter_handle;
3410 if (!adapter->handle) {
3411 dev_err(&dev->dev, "failed getting handle for adapter"
3412 " '%pOF'\n", dev->dev.of_node);
3413 ret = -ENODEV;
3414 goto out_free_ad;
3415 }
3417 adapter->pd = EHEA_PD_ID;
3419 platform_set_drvdata(dev, adapter);
3422 /* initialize adapter and ports */
3423 /* get adapter properties */
3424 ret = ehea_sense_adapter_attr(adapter);
3425 if (ret) {
3426 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3427 goto out_free_ad;
3428 }
3430 adapter->neq = ehea_create_eq(adapter,
3431 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3432 if (!adapter->neq) {
3433 ret = -EIO;
3434 dev_err(&dev->dev, "NEQ creation failed\n");
3435 goto out_free_ad;
3436 }
3438 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3439 (unsigned long)adapter);
3441 ret = ehea_create_device_sysfs(dev);
3442 if (ret)
3443 goto out_kill_eq;
3445 ret = ehea_setup_ports(adapter);
3446 if (ret) {
3447 dev_err(&dev->dev, "setup_ports failed\n");
3448 goto out_rem_dev_sysfs;
3449 }
3451 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3452 ehea_interrupt_neq, 0,
3453 "ehea_neq", adapter);
3454 if (ret) {
3455 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3456 goto out_shutdown_ports;
3457 }
3459 /* Handle any events that might be pending. */
3460 tasklet_hi_schedule(&adapter->neq_tasklet);
3462 ret = 0;
3463 goto out;
3465 out_shutdown_ports:
3466 for (i = 0; i < EHEA_MAX_PORTS; i++)
3467 if (adapter->port[i]) {
3468 ehea_shutdown_single_port(adapter->port[i]);
3469 adapter->port[i] = NULL;
3470 }
3472 out_rem_dev_sysfs:
3473 ehea_remove_device_sysfs(dev);
3475 out_kill_eq:
3476 ehea_destroy_eq(adapter->neq);
3478 out_free_ad:
3479 list_del(&adapter->list);
3481 out:
3482 ehea_update_firmware_handles();
3484 return ret;
3485 }
3487 static int ehea_remove(struct platform_device *dev)
3488 {
3489 struct ehea_adapter *adapter = platform_get_drvdata(dev);
3490 int i;
3492 for (i = 0; i < EHEA_MAX_PORTS; i++)
3493 if (adapter->port[i]) {
3494 ehea_shutdown_single_port(adapter->port[i]);
3495 adapter->port[i] = NULL;
3496 }
3498 ehea_remove_device_sysfs(dev);
3500 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3501 tasklet_kill(&adapter->neq_tasklet);
3503 ehea_destroy_eq(adapter->neq);
3504 ehea_remove_adapter_mr(adapter);
3505 list_del(&adapter->list);
3507 ehea_update_firmware_handles();
3509 return 0;
3510 }
3512 static int check_module_parm(void)
3513 {
3514 int ret = 0;
3516 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3517 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3518 pr_info("Bad parameter: rq1_entries\n");
3519 ret = -EINVAL;
3520 }
3521 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3522 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3523 pr_info("Bad parameter: rq2_entries\n");
3524 ret = -EINVAL;
3525 }
3526 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3527 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3528 pr_info("Bad parameter: rq3_entries\n");
3529 ret = -EINVAL;
3530 }
3531 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3532 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3533 pr_info("Bad parameter: sq_entries\n");
3534 ret = -EINVAL;
3535 }
3537 return ret;
3538 }
3540 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3541 {
3542 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3543 }
3545 static DRIVER_ATTR_RO(capabilities);
3547 static int __init ehea_module_init(void)
3548 {
3549 int ret;
3551 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3553 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3554 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3556 mutex_init(&ehea_fw_handles.lock);
3557 spin_lock_init(&ehea_bcmc_regs.lock);
3559 ret = check_module_parm();
3560 if (ret)
3561 goto out;
3563 ret = ibmebus_register_driver(&ehea_driver);
3564 if (ret) {
3565 pr_err("failed registering eHEA device driver on ebus\n");
3566 goto out;
3567 }
3569 ret = driver_create_file(&ehea_driver.driver,
3570 &driver_attr_capabilities);
3571 if (ret) {
3572 pr_err("failed to register capabilities attribute, ret=%d\n",
3573 ret);
3574 goto out2;
3575 }
3577 return ret;
3579 out2:
3580 ibmebus_unregister_driver(&ehea_driver);
3581 out:
3582 return ret;
3583 }
3585 static void __exit ehea_module_exit(void)
3586 {
3587 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3588 ibmebus_unregister_driver(&ehea_driver);
3589 ehea_unregister_memory_hooks();
3590 kfree(ehea_fw_handles.arr);
3591 kfree(ehea_bcmc_regs.arr);
3592 ehea_destroy_busmap();
3593 }
3595 module_init(ehea_module_init);
3596 module_exit(ehea_module_exit);