1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
4  *
5  *  eHEA ethernet device driver for IBM eServer System p
6  *
7  *  (C) Copyright IBM Corp. 2006
8  *
9  *  Authors:
10  *	 Christoph Raisch <raisch@de.ibm.com>
11  *	 Jan-Bernd Themann <themann@de.ibm.com>
12  *	 Thomas Klein <tklein@de.ibm.com>
13  */
14 
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16 
17 #include <linux/device.h>
18 #include <linux/in.h>
19 #include <linux/ip.h>
20 #include <linux/tcp.h>
21 #include <linux/udp.h>
22 #include <linux/if.h>
23 #include <linux/list.h>
24 #include <linux/slab.h>
25 #include <linux/if_ether.h>
26 #include <linux/notifier.h>
27 #include <linux/reboot.h>
28 #include <linux/memory.h>
29 #include <asm/kexec.h>
30 #include <linux/mutex.h>
31 #include <linux/prefetch.h>
32 #include <linux/of.h>
33 #include <linux/of_device.h>
34 #include <linux/platform_device.h>
35 
36 #include <net/ip.h>
37 
38 #include "ehea.h"
39 #include "ehea_qmr.h"
40 #include "ehea_phyp.h"
41 
42 
43 MODULE_LICENSE("GPL");
44 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
45 MODULE_DESCRIPTION("IBM eServer HEA Driver");
46 MODULE_VERSION(DRV_VERSION);
47 
48 
49 static int msg_level = -1;
50 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
51 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
52 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
53 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
54 static int use_mcs = 1;
55 static int prop_carrier_state;
56 
57 module_param(msg_level, int, 0);
58 module_param(rq1_entries, int, 0);
59 module_param(rq2_entries, int, 0);
60 module_param(rq3_entries, int, 0);
61 module_param(sq_entries, int, 0);
62 module_param(prop_carrier_state, int, 0);
63 module_param(use_mcs, int, 0);
64 
65 MODULE_PARM_DESC(msg_level, "msg_level");
66 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
67 		 "port to stack. 1:yes, 0:no.  Default = 0 ");
68 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
69 		 "[2^x - 1], x = [7..14]. Default = "
70 		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
71 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
72 		 "[2^x - 1], x = [7..14]. Default = "
73 		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
74 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
75 		 "[2^x - 1], x = [7..14]. Default = "
76 		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
77 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
78 		 "[2^x - 1], x = [7..14]. Default = "
79 		 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
80 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
81 		 "Default = 1");
82 
83 static int port_name_cnt;
84 static LIST_HEAD(adapter_list);
85 static unsigned long ehea_driver_flags;
86 static DEFINE_MUTEX(dlpar_mem_lock);
87 static struct ehea_fw_handle_array ehea_fw_handles;
88 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
89 
90 
91 static int ehea_probe_adapter(struct platform_device *dev);
92 
93 static int ehea_remove(struct platform_device *dev);
94 
95 static const struct of_device_id ehea_module_device_table[] = {
96 	{
97 		.name = "lhea",
98 		.compatible = "IBM,lhea",
99 	},
100 	{
101 		.type = "network",
102 		.compatible = "IBM,lhea-ethernet",
103 	},
104 	{},
105 };
106 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
107 
108 static const struct of_device_id ehea_device_table[] = {
109 	{
110 		.name = "lhea",
111 		.compatible = "IBM,lhea",
112 	},
113 	{},
114 };
115 MODULE_DEVICE_TABLE(of, ehea_device_table);
116 
117 static struct platform_driver ehea_driver = {
118 	.driver = {
119 		.name = "ehea",
120 		.owner = THIS_MODULE,
121 		.of_match_table = ehea_device_table,
122 	},
123 	.probe = ehea_probe_adapter,
124 	.remove = ehea_remove,
125 };
126 
127 void ehea_dump(void *adr, int len, char *msg)
128 {
129 	int x;
130 	unsigned char *deb = adr;
131 	for (x = 0; x < len; x += 16) {
132 		pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
133 			msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
134 		deb += 16;
135 	}
136 }
137 
138 static void ehea_schedule_port_reset(struct ehea_port *port)
139 {
140 	if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
141 		schedule_work(&port->reset_task);
142 }
143 
144 static void ehea_update_firmware_handles(void)
145 {
146 	struct ehea_fw_handle_entry *arr = NULL;
147 	struct ehea_adapter *adapter;
148 	int num_adapters = 0;
149 	int num_ports = 0;
150 	int num_portres = 0;
151 	int i = 0;
152 	int num_fw_handles, k, l;
153 
154 	/* Determine number of handles */
155 	mutex_lock(&ehea_fw_handles.lock);
156 
157 	list_for_each_entry(adapter, &adapter_list, list) {
158 		num_adapters++;
159 
160 		for (k = 0; k < EHEA_MAX_PORTS; k++) {
161 			struct ehea_port *port = adapter->port[k];
162 
163 			if (!port || (port->state != EHEA_PORT_UP))
164 				continue;
165 
166 			num_ports++;
167 			num_portres += port->num_def_qps;
168 		}
169 	}
170 
171 	num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
172 			 num_ports * EHEA_NUM_PORT_FW_HANDLES +
173 			 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
174 
175 	if (num_fw_handles) {
176 		arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
177 		if (!arr)
178 			goto out;  /* Keep the existing array */
179 	} else
180 		goto out_update;
181 
182 	list_for_each_entry(adapter, &adapter_list, list) {
183 		if (num_adapters == 0)
184 			break;
185 
186 		for (k = 0; k < EHEA_MAX_PORTS; k++) {
187 			struct ehea_port *port = adapter->port[k];
188 
189 			if (!port || (port->state != EHEA_PORT_UP) ||
190 			    (num_ports == 0))
191 				continue;
192 
193 			for (l = 0; l < port->num_def_qps; l++) {
194 				struct ehea_port_res *pr = &port->port_res[l];
195 
196 				arr[i].adh = adapter->handle;
197 				arr[i++].fwh = pr->qp->fw_handle;
198 				arr[i].adh = adapter->handle;
199 				arr[i++].fwh = pr->send_cq->fw_handle;
200 				arr[i].adh = adapter->handle;
201 				arr[i++].fwh = pr->recv_cq->fw_handle;
202 				arr[i].adh = adapter->handle;
203 				arr[i++].fwh = pr->eq->fw_handle;
204 				arr[i].adh = adapter->handle;
205 				arr[i++].fwh = pr->send_mr.handle;
206 				arr[i].adh = adapter->handle;
207 				arr[i++].fwh = pr->recv_mr.handle;
208 			}
209 			arr[i].adh = adapter->handle;
210 			arr[i++].fwh = port->qp_eq->fw_handle;
211 			num_ports--;
212 		}
213 
214 		arr[i].adh = adapter->handle;
215 		arr[i++].fwh = adapter->neq->fw_handle;
216 
217 		if (adapter->mr.handle) {
218 			arr[i].adh = adapter->handle;
219 			arr[i++].fwh = adapter->mr.handle;
220 		}
221 		num_adapters--;
222 	}
223 
224 out_update:
225 	kfree(ehea_fw_handles.arr);
226 	ehea_fw_handles.arr = arr;
227 	ehea_fw_handles.num_entries = i;
228 out:
229 	mutex_unlock(&ehea_fw_handles.lock);
230 }
231 
232 static void ehea_update_bcmc_registrations(void)
233 {
234 	unsigned long flags;
235 	struct ehea_bcmc_reg_entry *arr = NULL;
236 	struct ehea_adapter *adapter;
237 	struct ehea_mc_list *mc_entry;
238 	int num_registrations = 0;
239 	int i = 0;
240 	int k;
241 
242 	spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
243 
244 	/* Determine number of registrations */
245 	list_for_each_entry(adapter, &adapter_list, list)
246 		for (k = 0; k < EHEA_MAX_PORTS; k++) {
247 			struct ehea_port *port = adapter->port[k];
248 
249 			if (!port || (port->state != EHEA_PORT_UP))
250 				continue;
251 
252 			num_registrations += 2;	/* Broadcast registrations */
253 
254 			list_for_each_entry(mc_entry, &port->mc_list->list,list)
255 				num_registrations += 2;
256 		}
257 
258 	if (num_registrations) {
259 		arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
260 		if (!arr)
261 			goto out;  /* Keep the existing array */
262 	} else
263 		goto out_update;
264 
265 	list_for_each_entry(adapter, &adapter_list, list) {
266 		for (k = 0; k < EHEA_MAX_PORTS; k++) {
267 			struct ehea_port *port = adapter->port[k];
268 
269 			if (!port || (port->state != EHEA_PORT_UP))
270 				continue;
271 
272 			if (num_registrations == 0)
273 				goto out_update;
274 
275 			arr[i].adh = adapter->handle;
276 			arr[i].port_id = port->logical_port_id;
277 			arr[i].reg_type = EHEA_BCMC_BROADCAST |
278 					  EHEA_BCMC_UNTAGGED;
279 			arr[i++].macaddr = port->mac_addr;
280 
281 			arr[i].adh = adapter->handle;
282 			arr[i].port_id = port->logical_port_id;
283 			arr[i].reg_type = EHEA_BCMC_BROADCAST |
284 					  EHEA_BCMC_VLANID_ALL;
285 			arr[i++].macaddr = port->mac_addr;
286 			num_registrations -= 2;
287 
288 			list_for_each_entry(mc_entry,
289 					    &port->mc_list->list, list) {
290 				if (num_registrations == 0)
291 					goto out_update;
292 
293 				arr[i].adh = adapter->handle;
294 				arr[i].port_id = port->logical_port_id;
295 				arr[i].reg_type = EHEA_BCMC_MULTICAST |
296 						  EHEA_BCMC_UNTAGGED;
297 				if (mc_entry->macaddr == 0)
298 					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
299 				arr[i++].macaddr = mc_entry->macaddr;
300 
301 				arr[i].adh = adapter->handle;
302 				arr[i].port_id = port->logical_port_id;
303 				arr[i].reg_type = EHEA_BCMC_MULTICAST |
304 						  EHEA_BCMC_VLANID_ALL;
305 				if (mc_entry->macaddr == 0)
306 					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
307 				arr[i++].macaddr = mc_entry->macaddr;
308 				num_registrations -= 2;
309 			}
310 		}
311 	}
312 
313 out_update:
314 	kfree(ehea_bcmc_regs.arr);
315 	ehea_bcmc_regs.arr = arr;
316 	ehea_bcmc_regs.num_entries = i;
317 out:
318 	spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
319 }
320 
321 static void ehea_get_stats64(struct net_device *dev,
322 			     struct rtnl_link_stats64 *stats)
323 {
324 	struct ehea_port *port = netdev_priv(dev);
325 	u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
326 	int i;
327 
328 	for (i = 0; i < port->num_def_qps; i++) {
329 		rx_packets += port->port_res[i].rx_packets;
330 		rx_bytes   += port->port_res[i].rx_bytes;
331 	}
332 
333 	for (i = 0; i < port->num_def_qps; i++) {
334 		tx_packets += port->port_res[i].tx_packets;
335 		tx_bytes   += port->port_res[i].tx_bytes;
336 	}
337 
338 	stats->tx_packets = tx_packets;
339 	stats->rx_bytes = rx_bytes;
340 	stats->tx_bytes = tx_bytes;
341 	stats->rx_packets = rx_packets;
342 
343 	stats->multicast = port->stats.multicast;
344 	stats->rx_errors = port->stats.rx_errors;
345 }
346 
347 static void ehea_update_stats(struct work_struct *work)
348 {
349 	struct ehea_port *port =
350 		container_of(work, struct ehea_port, stats_work.work);
351 	struct net_device *dev = port->netdev;
352 	struct rtnl_link_stats64 *stats = &port->stats;
353 	struct hcp_ehea_port_cb2 *cb2;
354 	u64 hret;
355 
356 	cb2 = (void *)get_zeroed_page(GFP_KERNEL);
357 	if (!cb2) {
358 		netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
359 		goto resched;
360 	}
361 
362 	hret = ehea_h_query_ehea_port(port->adapter->handle,
363 				      port->logical_port_id,
364 				      H_PORT_CB2, H_PORT_CB2_ALL, cb2);
365 	if (hret != H_SUCCESS) {
366 		netdev_err(dev, "query_ehea_port failed\n");
367 		goto out_herr;
368 	}
369 
370 	if (netif_msg_hw(port))
371 		ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
372 
373 	stats->multicast = cb2->rxmcp;
374 	stats->rx_errors = cb2->rxuerr;
375 
376 out_herr:
377 	free_page((unsigned long)cb2);
378 resched:
379 	schedule_delayed_work(&port->stats_work,
380 			      round_jiffies_relative(msecs_to_jiffies(1000)));
381 }
382 
383 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
384 {
385 	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
386 	struct net_device *dev = pr->port->netdev;
387 	int max_index_mask = pr->rq1_skba.len - 1;
388 	int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
389 	int adder = 0;
390 	int i;
391 
392 	pr->rq1_skba.os_skbs = 0;
393 
394 	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
395 		if (nr_of_wqes > 0)
396 			pr->rq1_skba.index = index;
397 		pr->rq1_skba.os_skbs = fill_wqes;
398 		return;
399 	}
400 
401 	for (i = 0; i < fill_wqes; i++) {
402 		if (!skb_arr_rq1[index]) {
403 			skb_arr_rq1[index] = netdev_alloc_skb(dev,
404 							      EHEA_L_PKT_SIZE);
405 			if (!skb_arr_rq1[index]) {
406 				pr->rq1_skba.os_skbs = fill_wqes - i;
407 				break;
408 			}
409 		}
410 		index--;
411 		index &= max_index_mask;
412 		adder++;
413 	}
414 
415 	if (adder == 0)
416 		return;
417 
418 	/* Ring doorbell */
419 	ehea_update_rq1a(pr->qp, adder);
420 }
421 
422 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
423 {
424 	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
425 	struct net_device *dev = pr->port->netdev;
426 	int i;
427 
428 	if (nr_rq1a > pr->rq1_skba.len) {
429 		netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
430 		return;
431 	}
432 
433 	for (i = 0; i < nr_rq1a; i++) {
434 		skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
435 		if (!skb_arr_rq1[i])
436 			break;
437 	}
438 	/* Ring doorbell */
439 	ehea_update_rq1a(pr->qp, i - 1);
440 }
441 
442 static int ehea_refill_rq_def(struct ehea_port_res *pr,
443 			      struct ehea_q_skb_arr *q_skba, int rq_nr,
444 			      int num_wqes, int wqe_type, int packet_size)
445 {
446 	struct net_device *dev = pr->port->netdev;
447 	struct ehea_qp *qp = pr->qp;
448 	struct sk_buff **skb_arr = q_skba->arr;
449 	struct ehea_rwqe *rwqe;
450 	int i, index, max_index_mask, fill_wqes;
451 	int adder = 0;
452 	int ret = 0;
453 
454 	fill_wqes = q_skba->os_skbs + num_wqes;
455 	q_skba->os_skbs = 0;
456 
457 	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
458 		q_skba->os_skbs = fill_wqes;
459 		return ret;
460 	}
461 
462 	index = q_skba->index;
463 	max_index_mask = q_skba->len - 1;
464 	for (i = 0; i < fill_wqes; i++) {
465 		u64 tmp_addr;
466 		struct sk_buff *skb;
467 
468 		skb = netdev_alloc_skb_ip_align(dev, packet_size);
469 		if (!skb) {
470 			q_skba->os_skbs = fill_wqes - i;
471 			if (q_skba->os_skbs == q_skba->len - 2) {
472 				netdev_info(pr->port->netdev,
473 					    "rq%i ran dry - no mem for skb\n",
474 					    rq_nr);
475 				ret = -ENOMEM;
476 			}
477 			break;
478 		}
479 
480 		skb_arr[index] = skb;
481 		tmp_addr = ehea_map_vaddr(skb->data);
482 		if (tmp_addr == -1) {
483 			dev_consume_skb_any(skb);
484 			q_skba->os_skbs = fill_wqes - i;
485 			ret = 0;
486 			break;
487 		}
488 
489 		rwqe = ehea_get_next_rwqe(qp, rq_nr);
490 		rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
491 			    | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
492 		rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
493 		rwqe->sg_list[0].vaddr = tmp_addr;
494 		rwqe->sg_list[0].len = packet_size;
495 		rwqe->data_segments = 1;
496 
497 		index++;
498 		index &= max_index_mask;
499 		adder++;
500 	}
501 
502 	q_skba->index = index;
503 	if (adder == 0)
504 		goto out;
505 
506 	/* Ring doorbell */
507 	iosync();
508 	if (rq_nr == 2)
509 		ehea_update_rq2a(pr->qp, adder);
510 	else
511 		ehea_update_rq3a(pr->qp, adder);
512 out:
513 	return ret;
514 }
515 
516 
517 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
518 {
519 	return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
520 				  nr_of_wqes, EHEA_RWQE2_TYPE,
521 				  EHEA_RQ2_PKT_SIZE);
522 }
523 
524 
525 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
526 {
527 	return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
528 				  nr_of_wqes, EHEA_RWQE3_TYPE,
529 				  EHEA_MAX_PACKET_SIZE);
530 }
531 
532 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
533 {
534 	*rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
535 	if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
536 		return 0;
537 	if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
538 	    (cqe->header_length == 0))
539 		return 0;
540 	return -EINVAL;
541 }
542 
543 static inline void ehea_fill_skb(struct net_device *dev,
544 				 struct sk_buff *skb, struct ehea_cqe *cqe,
545 				 struct ehea_port_res *pr)
546 {
547 	int length = cqe->num_bytes_transfered - 4;	/*remove CRC */
548 
549 	skb_put(skb, length);
550 	skb->protocol = eth_type_trans(skb, dev);
551 
552 	/* The packet was not an IPV4 packet so a complemented checksum was
553 	   calculated. The value is found in the Internet Checksum field. */
554 	if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
555 		skb->ip_summed = CHECKSUM_COMPLETE;
556 		skb->csum = csum_unfold(~cqe->inet_checksum_value);
557 	} else
558 		skb->ip_summed = CHECKSUM_UNNECESSARY;
559 
560 	skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
561 }
562 
563 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
564 					       int arr_len,
565 					       struct ehea_cqe *cqe)
566 {
567 	int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
568 	struct sk_buff *skb;
569 	void *pref;
570 	int x;
571 
572 	x = skb_index + 1;
573 	x &= (arr_len - 1);
574 
575 	pref = skb_array[x];
576 	if (pref) {
577 		prefetchw(pref);
578 		prefetchw(pref + EHEA_CACHE_LINE);
579 
580 		pref = (skb_array[x]->data);
581 		prefetch(pref);
582 		prefetch(pref + EHEA_CACHE_LINE);
583 		prefetch(pref + EHEA_CACHE_LINE * 2);
584 		prefetch(pref + EHEA_CACHE_LINE * 3);
585 	}
586 
587 	skb = skb_array[skb_index];
588 	skb_array[skb_index] = NULL;
589 	return skb;
590 }
591 
592 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
593 						  int arr_len, int wqe_index)
594 {
595 	struct sk_buff *skb;
596 	void *pref;
597 	int x;
598 
599 	x = wqe_index + 1;
600 	x &= (arr_len - 1);
601 
602 	pref = skb_array[x];
603 	if (pref) {
604 		prefetchw(pref);
605 		prefetchw(pref + EHEA_CACHE_LINE);
606 
607 		pref = (skb_array[x]->data);
608 		prefetchw(pref);
609 		prefetchw(pref + EHEA_CACHE_LINE);
610 	}
611 
612 	skb = skb_array[wqe_index];
613 	skb_array[wqe_index] = NULL;
614 	return skb;
615 }
616 
617 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
618 				 struct ehea_cqe *cqe, int *processed_rq2,
619 				 int *processed_rq3)
620 {
621 	struct sk_buff *skb;
622 
623 	if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
624 		pr->p_stats.err_tcp_cksum++;
625 	if (cqe->status & EHEA_CQE_STAT_ERR_IP)
626 		pr->p_stats.err_ip_cksum++;
627 	if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
628 		pr->p_stats.err_frame_crc++;
629 
630 	if (rq == 2) {
631 		*processed_rq2 += 1;
632 		skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
633 		dev_kfree_skb(skb);
634 	} else if (rq == 3) {
635 		*processed_rq3 += 1;
636 		skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
637 		dev_kfree_skb(skb);
638 	}
639 
640 	if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
641 		if (netif_msg_rx_err(pr->port)) {
642 			pr_err("Critical receive error for QP %d. Resetting port.\n",
643 			       pr->qp->init_attr.qp_nr);
644 			ehea_dump(cqe, sizeof(*cqe), "CQE");
645 		}
646 		ehea_schedule_port_reset(pr->port);
647 		return 1;
648 	}
649 
650 	return 0;
651 }
652 
653 static int ehea_proc_rwqes(struct net_device *dev,
654 			   struct ehea_port_res *pr,
655 			   int budget)
656 {
657 	struct ehea_port *port = pr->port;
658 	struct ehea_qp *qp = pr->qp;
659 	struct ehea_cqe *cqe;
660 	struct sk_buff *skb;
661 	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
662 	struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
663 	struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
664 	int skb_arr_rq1_len = pr->rq1_skba.len;
665 	int skb_arr_rq2_len = pr->rq2_skba.len;
666 	int skb_arr_rq3_len = pr->rq3_skba.len;
667 	int processed, processed_rq1, processed_rq2, processed_rq3;
668 	u64 processed_bytes = 0;
669 	int wqe_index, last_wqe_index, rq, port_reset;
670 
671 	processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
672 	last_wqe_index = 0;
673 
674 	cqe = ehea_poll_rq1(qp, &wqe_index);
675 	while ((processed < budget) && cqe) {
676 		ehea_inc_rq1(qp);
677 		processed_rq1++;
678 		processed++;
679 		if (netif_msg_rx_status(port))
680 			ehea_dump(cqe, sizeof(*cqe), "CQE");
681 
682 		last_wqe_index = wqe_index;
683 		rmb();
684 		if (!ehea_check_cqe(cqe, &rq)) {
685 			if (rq == 1) {
686 				/* LL RQ1 */
687 				skb = get_skb_by_index_ll(skb_arr_rq1,
688 							  skb_arr_rq1_len,
689 							  wqe_index);
690 				if (unlikely(!skb)) {
691 					netif_info(port, rx_err, dev,
692 						  "LL rq1: skb=NULL\n");
693 
694 					skb = netdev_alloc_skb(dev,
695 							       EHEA_L_PKT_SIZE);
696 					if (!skb)
697 						break;
698 				}
699 				skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
700 						 cqe->num_bytes_transfered - 4);
701 				ehea_fill_skb(dev, skb, cqe, pr);
702 			} else if (rq == 2) {
703 				/* RQ2 */
704 				skb = get_skb_by_index(skb_arr_rq2,
705 						       skb_arr_rq2_len, cqe);
706 				if (unlikely(!skb)) {
707 					netif_err(port, rx_err, dev,
708 						  "rq2: skb=NULL\n");
709 					break;
710 				}
711 				ehea_fill_skb(dev, skb, cqe, pr);
712 				processed_rq2++;
713 			} else {
714 				/* RQ3 */
715 				skb = get_skb_by_index(skb_arr_rq3,
716 						       skb_arr_rq3_len, cqe);
717 				if (unlikely(!skb)) {
718 					netif_err(port, rx_err, dev,
719 						  "rq3: skb=NULL\n");
720 					break;
721 				}
722 				ehea_fill_skb(dev, skb, cqe, pr);
723 				processed_rq3++;
724 			}
725 
726 			processed_bytes += skb->len;
727 
728 			if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
729 				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
730 						       cqe->vlan_tag);
731 
732 			napi_gro_receive(&pr->napi, skb);
733 		} else {
734 			pr->p_stats.poll_receive_errors++;
735 			port_reset = ehea_treat_poll_error(pr, rq, cqe,
736 							   &processed_rq2,
737 							   &processed_rq3);
738 			if (port_reset)
739 				break;
740 		}
741 		cqe = ehea_poll_rq1(qp, &wqe_index);
742 	}
743 
744 	pr->rx_packets += processed;
745 	pr->rx_bytes += processed_bytes;
746 
747 	ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
748 	ehea_refill_rq2(pr, processed_rq2);
749 	ehea_refill_rq3(pr, processed_rq3);
750 
751 	return processed;
752 }
753 
754 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
755 
756 static void reset_sq_restart_flag(struct ehea_port *port)
757 {
758 	int i;
759 
760 	for (i = 0; i < port->num_def_qps; i++) {
761 		struct ehea_port_res *pr = &port->port_res[i];
762 		pr->sq_restart_flag = 0;
763 	}
764 	wake_up(&port->restart_wq);
765 }
766 
767 static void check_sqs(struct ehea_port *port)
768 {
769 	struct ehea_swqe *swqe;
770 	int swqe_index;
771 	int i;
772 
773 	for (i = 0; i < port->num_def_qps; i++) {
774 		struct ehea_port_res *pr = &port->port_res[i];
775 		int ret;
776 		swqe = ehea_get_swqe(pr->qp, &swqe_index);
777 		memset(swqe, 0, SWQE_HEADER_SIZE);
778 		atomic_dec(&pr->swqe_avail);
779 
780 		swqe->tx_control |= EHEA_SWQE_PURGE;
781 		swqe->wr_id = SWQE_RESTART_CHECK;
782 		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
783 		swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
784 		swqe->immediate_data_length = 80;
785 
786 		ehea_post_swqe(pr->qp, swqe);
787 
788 		ret = wait_event_timeout(port->restart_wq,
789 					 pr->sq_restart_flag == 0,
790 					 msecs_to_jiffies(100));
791 
792 		if (!ret) {
793 			pr_err("HW/SW queues out of sync\n");
794 			ehea_schedule_port_reset(pr->port);
795 			return;
796 		}
797 	}
798 }
799 
800 
801 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
802 {
803 	struct sk_buff *skb;
804 	struct ehea_cq *send_cq = pr->send_cq;
805 	struct ehea_cqe *cqe;
806 	int quota = my_quota;
807 	int cqe_counter = 0;
808 	int swqe_av = 0;
809 	int index;
810 	struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
811 						pr - &pr->port->port_res[0]);
812 
813 	cqe = ehea_poll_cq(send_cq);
814 	while (cqe && (quota > 0)) {
815 		ehea_inc_cq(send_cq);
816 
817 		cqe_counter++;
818 		rmb();
819 
820 		if (cqe->wr_id == SWQE_RESTART_CHECK) {
821 			pr->sq_restart_flag = 1;
822 			swqe_av++;
823 			break;
824 		}
825 
826 		if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
827 			pr_err("Bad send completion status=0x%04X\n",
828 			       cqe->status);
829 
830 			if (netif_msg_tx_err(pr->port))
831 				ehea_dump(cqe, sizeof(*cqe), "Send CQE");
832 
833 			if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
834 				pr_err("Resetting port\n");
835 				ehea_schedule_port_reset(pr->port);
836 				break;
837 			}
838 		}
839 
840 		if (netif_msg_tx_done(pr->port))
841 			ehea_dump(cqe, sizeof(*cqe), "CQE");
842 
843 		if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
844 			   == EHEA_SWQE2_TYPE)) {
845 
846 			index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
847 			skb = pr->sq_skba.arr[index];
848 			dev_consume_skb_any(skb);
849 			pr->sq_skba.arr[index] = NULL;
850 		}
851 
852 		swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
853 		quota--;
854 
855 		cqe = ehea_poll_cq(send_cq);
856 	}
857 
858 	ehea_update_feca(send_cq, cqe_counter);
859 	atomic_add(swqe_av, &pr->swqe_avail);
860 
861 	if (unlikely(netif_tx_queue_stopped(txq) &&
862 		     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
863 		__netif_tx_lock(txq, smp_processor_id());
864 		if (netif_tx_queue_stopped(txq) &&
865 		    (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
866 			netif_tx_wake_queue(txq);
867 		__netif_tx_unlock(txq);
868 	}
869 
870 	wake_up(&pr->port->swqe_avail_wq);
871 
872 	return cqe;
873 }
874 
875 #define EHEA_POLL_MAX_CQES 65535
876 
877 static int ehea_poll(struct napi_struct *napi, int budget)
878 {
879 	struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
880 						napi);
881 	struct net_device *dev = pr->port->netdev;
882 	struct ehea_cqe *cqe;
883 	struct ehea_cqe *cqe_skb = NULL;
884 	int wqe_index;
885 	int rx = 0;
886 
887 	cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
888 	rx += ehea_proc_rwqes(dev, pr, budget - rx);
889 
890 	while (rx != budget) {
891 		napi_complete(napi);
892 		ehea_reset_cq_ep(pr->recv_cq);
893 		ehea_reset_cq_ep(pr->send_cq);
894 		ehea_reset_cq_n1(pr->recv_cq);
895 		ehea_reset_cq_n1(pr->send_cq);
896 		rmb();
897 		cqe = ehea_poll_rq1(pr->qp, &wqe_index);
898 		cqe_skb = ehea_poll_cq(pr->send_cq);
899 
900 		if (!cqe && !cqe_skb)
901 			return rx;
902 
903 		if (!napi_reschedule(napi))
904 			return rx;
905 
906 		cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
907 		rx += ehea_proc_rwqes(dev, pr, budget - rx);
908 	}
909 
910 	return rx;
911 }
912 
913 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
914 {
915 	struct ehea_port_res *pr = param;
916 
917 	napi_schedule(&pr->napi);
918 
919 	return IRQ_HANDLED;
920 }
921 
922 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
923 {
924 	struct ehea_port *port = param;
925 	struct ehea_eqe *eqe;
926 	struct ehea_qp *qp;
927 	u32 qp_token;
928 	u64 resource_type, aer, aerr;
929 	int reset_port = 0;
930 
931 	eqe = ehea_poll_eq(port->qp_eq);
932 
933 	while (eqe) {
934 		qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
935 		pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
936 		       eqe->entry, qp_token);
937 
938 		qp = port->port_res[qp_token].qp;
939 
940 		resource_type = ehea_error_data(port->adapter, qp->fw_handle,
941 						&aer, &aerr);
942 
943 		if (resource_type == EHEA_AER_RESTYPE_QP) {
944 			if ((aer & EHEA_AER_RESET_MASK) ||
945 			    (aerr & EHEA_AERR_RESET_MASK))
946 				 reset_port = 1;
947 		} else
948 			reset_port = 1;   /* Reset in case of CQ or EQ error */
949 
950 		eqe = ehea_poll_eq(port->qp_eq);
951 	}
952 
953 	if (reset_port) {
954 		pr_err("Resetting port\n");
955 		ehea_schedule_port_reset(port);
956 	}
957 
958 	return IRQ_HANDLED;
959 }
960 
961 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
962 				       int logical_port)
963 {
964 	int i;
965 
966 	for (i = 0; i < EHEA_MAX_PORTS; i++)
967 		if (adapter->port[i])
968 			if (adapter->port[i]->logical_port_id == logical_port)
969 				return adapter->port[i];
970 	return NULL;
971 }
972 
973 int ehea_sense_port_attr(struct ehea_port *port)
974 {
975 	int ret;
976 	u64 hret;
977 	struct hcp_ehea_port_cb0 *cb0;
978 
979 	/* may be called via ehea_neq_tasklet() */
980 	cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
981 	if (!cb0) {
982 		pr_err("no mem for cb0\n");
983 		ret = -ENOMEM;
984 		goto out;
985 	}
986 
987 	hret = ehea_h_query_ehea_port(port->adapter->handle,
988 				      port->logical_port_id, H_PORT_CB0,
989 				      EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
990 				      cb0);
991 	if (hret != H_SUCCESS) {
992 		ret = -EIO;
993 		goto out_free;
994 	}
995 
996 	/* MAC address */
997 	port->mac_addr = cb0->port_mac_addr << 16;
998 
999 	if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1000 		ret = -EADDRNOTAVAIL;
1001 		goto out_free;
1002 	}
1003 
1004 	/* Port speed */
1005 	switch (cb0->port_speed) {
1006 	case H_SPEED_10M_H:
1007 		port->port_speed = EHEA_SPEED_10M;
1008 		port->full_duplex = 0;
1009 		break;
1010 	case H_SPEED_10M_F:
1011 		port->port_speed = EHEA_SPEED_10M;
1012 		port->full_duplex = 1;
1013 		break;
1014 	case H_SPEED_100M_H:
1015 		port->port_speed = EHEA_SPEED_100M;
1016 		port->full_duplex = 0;
1017 		break;
1018 	case H_SPEED_100M_F:
1019 		port->port_speed = EHEA_SPEED_100M;
1020 		port->full_duplex = 1;
1021 		break;
1022 	case H_SPEED_1G_F:
1023 		port->port_speed = EHEA_SPEED_1G;
1024 		port->full_duplex = 1;
1025 		break;
1026 	case H_SPEED_10G_F:
1027 		port->port_speed = EHEA_SPEED_10G;
1028 		port->full_duplex = 1;
1029 		break;
1030 	default:
1031 		port->port_speed = 0;
1032 		port->full_duplex = 0;
1033 		break;
1034 	}
1035 
1036 	port->autoneg = 1;
1037 	port->num_mcs = cb0->num_default_qps;
1038 
1039 	/* Number of default QPs */
1040 	if (use_mcs)
1041 		port->num_def_qps = cb0->num_default_qps;
1042 	else
1043 		port->num_def_qps = 1;
1044 
1045 	if (!port->num_def_qps) {
1046 		ret = -EINVAL;
1047 		goto out_free;
1048 	}
1049 
1050 	ret = 0;
1051 out_free:
1052 	if (ret || netif_msg_probe(port))
1053 		ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1054 	free_page((unsigned long)cb0);
1055 out:
1056 	return ret;
1057 }
1058 
1059 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1060 {
1061 	struct hcp_ehea_port_cb4 *cb4;
1062 	u64 hret;
1063 	int ret = 0;
1064 
1065 	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1066 	if (!cb4) {
1067 		pr_err("no mem for cb4\n");
1068 		ret = -ENOMEM;
1069 		goto out;
1070 	}
1071 
1072 	cb4->port_speed = port_speed;
1073 
1074 	netif_carrier_off(port->netdev);
1075 
1076 	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1077 				       port->logical_port_id,
1078 				       H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1079 	if (hret == H_SUCCESS) {
1080 		port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1081 
1082 		hret = ehea_h_query_ehea_port(port->adapter->handle,
1083 					      port->logical_port_id,
1084 					      H_PORT_CB4, H_PORT_CB4_SPEED,
1085 					      cb4);
1086 		if (hret == H_SUCCESS) {
1087 			switch (cb4->port_speed) {
1088 			case H_SPEED_10M_H:
1089 				port->port_speed = EHEA_SPEED_10M;
1090 				port->full_duplex = 0;
1091 				break;
1092 			case H_SPEED_10M_F:
1093 				port->port_speed = EHEA_SPEED_10M;
1094 				port->full_duplex = 1;
1095 				break;
1096 			case H_SPEED_100M_H:
1097 				port->port_speed = EHEA_SPEED_100M;
1098 				port->full_duplex = 0;
1099 				break;
1100 			case H_SPEED_100M_F:
1101 				port->port_speed = EHEA_SPEED_100M;
1102 				port->full_duplex = 1;
1103 				break;
1104 			case H_SPEED_1G_F:
1105 				port->port_speed = EHEA_SPEED_1G;
1106 				port->full_duplex = 1;
1107 				break;
1108 			case H_SPEED_10G_F:
1109 				port->port_speed = EHEA_SPEED_10G;
1110 				port->full_duplex = 1;
1111 				break;
1112 			default:
1113 				port->port_speed = 0;
1114 				port->full_duplex = 0;
1115 				break;
1116 			}
1117 		} else {
1118 			pr_err("Failed sensing port speed\n");
1119 			ret = -EIO;
1120 		}
1121 	} else {
1122 		if (hret == H_AUTHORITY) {
1123 			pr_info("Hypervisor denied setting port speed\n");
1124 			ret = -EPERM;
1125 		} else {
1126 			ret = -EIO;
1127 			pr_err("Failed setting port speed\n");
1128 		}
1129 	}
1130 	if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1131 		netif_carrier_on(port->netdev);
1132 
1133 	free_page((unsigned long)cb4);
1134 out:
1135 	return ret;
1136 }
1137 
1138 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1139 {
1140 	int ret;
1141 	u8 ec;
1142 	u8 portnum;
1143 	struct ehea_port *port;
1144 	struct net_device *dev;
1145 
1146 	ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1147 	portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1148 	port = ehea_get_port(adapter, portnum);
1149 	if (!port) {
1150 		netdev_err(NULL, "unknown portnum %x\n", portnum);
1151 		return;
1152 	}
1153 	dev = port->netdev;
1154 
1155 	switch (ec) {
1156 	case EHEA_EC_PORTSTATE_CHG:	/* port state change */
1157 
1158 		if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1159 			if (!netif_carrier_ok(dev)) {
1160 				ret = ehea_sense_port_attr(port);
1161 				if (ret) {
1162 					netdev_err(dev, "failed resensing port attributes\n");
1163 					break;
1164 				}
1165 
1166 				netif_info(port, link, dev,
1167 					   "Logical port up: %dMbps %s Duplex\n",
1168 					   port->port_speed,
1169 					   port->full_duplex == 1 ?
1170 					   "Full" : "Half");
1171 
1172 				netif_carrier_on(dev);
1173 				netif_wake_queue(dev);
1174 			}
1175 		} else
1176 			if (netif_carrier_ok(dev)) {
1177 				netif_info(port, link, dev,
1178 					   "Logical port down\n");
1179 				netif_carrier_off(dev);
1180 				netif_tx_disable(dev);
1181 			}
1182 
1183 		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1184 			port->phy_link = EHEA_PHY_LINK_UP;
1185 			netif_info(port, link, dev,
1186 				   "Physical port up\n");
1187 			if (prop_carrier_state)
1188 				netif_carrier_on(dev);
1189 		} else {
1190 			port->phy_link = EHEA_PHY_LINK_DOWN;
1191 			netif_info(port, link, dev,
1192 				   "Physical port down\n");
1193 			if (prop_carrier_state)
1194 				netif_carrier_off(dev);
1195 		}
1196 
1197 		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1198 			netdev_info(dev,
1199 				    "External switch port is primary port\n");
1200 		else
1201 			netdev_info(dev,
1202 				    "External switch port is backup port\n");
1203 
1204 		break;
1205 	case EHEA_EC_ADAPTER_MALFUNC:
1206 		netdev_err(dev, "Adapter malfunction\n");
1207 		break;
1208 	case EHEA_EC_PORT_MALFUNC:
1209 		netdev_info(dev, "Port malfunction\n");
1210 		netif_carrier_off(dev);
1211 		netif_tx_disable(dev);
1212 		break;
1213 	default:
1214 		netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1215 		break;
1216 	}
1217 }
1218 
1219 static void ehea_neq_tasklet(struct tasklet_struct *t)
1220 {
1221 	struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);
1222 	struct ehea_eqe *eqe;
1223 	u64 event_mask;
1224 
1225 	eqe = ehea_poll_eq(adapter->neq);
1226 	pr_debug("eqe=%p\n", eqe);
1227 
1228 	while (eqe) {
1229 		pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1230 		ehea_parse_eqe(adapter, eqe->entry);
1231 		eqe = ehea_poll_eq(adapter->neq);
1232 		pr_debug("next eqe=%p\n", eqe);
1233 	}
1234 
1235 	event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1236 		   | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1237 		   | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1238 
1239 	ehea_h_reset_events(adapter->handle,
1240 			    adapter->neq->fw_handle, event_mask);
1241 }
1242 
1243 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1244 {
1245 	struct ehea_adapter *adapter = param;
1246 	tasklet_hi_schedule(&adapter->neq_tasklet);
1247 	return IRQ_HANDLED;
1248 }
1249 
1250 
1251 static int ehea_fill_port_res(struct ehea_port_res *pr)
1252 {
1253 	int ret;
1254 	struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1255 
1256 	ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1257 
1258 	ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1259 
1260 	ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1261 
1262 	return ret;
1263 }
1264 
1265 static int ehea_reg_interrupts(struct net_device *dev)
1266 {
1267 	struct ehea_port *port = netdev_priv(dev);
1268 	struct ehea_port_res *pr;
1269 	int i, ret;
1270 
1271 
1272 	snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1273 		 dev->name);
1274 
1275 	ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1276 				  ehea_qp_aff_irq_handler,
1277 				  0, port->int_aff_name, port);
1278 	if (ret) {
1279 		netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1280 			   port->qp_eq->attr.ist1);
1281 		goto out_free_qpeq;
1282 	}
1283 
1284 	netif_info(port, ifup, dev,
1285 		   "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1286 		   port->qp_eq->attr.ist1);
1287 
1288 
1289 	for (i = 0; i < port->num_def_qps; i++) {
1290 		pr = &port->port_res[i];
1291 		snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1292 			 "%s-queue%d", dev->name, i);
1293 		ret = ibmebus_request_irq(pr->eq->attr.ist1,
1294 					  ehea_recv_irq_handler,
1295 					  0, pr->int_send_name, pr);
1296 		if (ret) {
1297 			netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1298 				   i, pr->eq->attr.ist1);
1299 			goto out_free_req;
1300 		}
1301 		netif_info(port, ifup, dev,
1302 			   "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1303 			   pr->eq->attr.ist1, i);
1304 	}
1305 out:
1306 	return ret;
1307 
1308 
1309 out_free_req:
1310 	while (--i >= 0) {
1311 		u32 ist = port->port_res[i].eq->attr.ist1;
1312 		ibmebus_free_irq(ist, &port->port_res[i]);
1313 	}
1314 
1315 out_free_qpeq:
1316 	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1317 	i = port->num_def_qps;
1318 
1319 	goto out;
1320 
1321 }
1322 
1323 static void ehea_free_interrupts(struct net_device *dev)
1324 {
1325 	struct ehea_port *port = netdev_priv(dev);
1326 	struct ehea_port_res *pr;
1327 	int i;
1328 
1329 	/* send */
1330 
1331 	for (i = 0; i < port->num_def_qps; i++) {
1332 		pr = &port->port_res[i];
1333 		ibmebus_free_irq(pr->eq->attr.ist1, pr);
1334 		netif_info(port, intr, dev,
1335 			   "free send irq for res %d with handle 0x%X\n",
1336 			   i, pr->eq->attr.ist1);
1337 	}
1338 
1339 	/* associated events */
1340 	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1341 	netif_info(port, intr, dev,
1342 		   "associated event interrupt for handle 0x%X freed\n",
1343 		   port->qp_eq->attr.ist1);
1344 }
1345 
1346 static int ehea_configure_port(struct ehea_port *port)
1347 {
1348 	int ret, i;
1349 	u64 hret, mask;
1350 	struct hcp_ehea_port_cb0 *cb0;
1351 
1352 	ret = -ENOMEM;
1353 	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1354 	if (!cb0)
1355 		goto out;
1356 
1357 	cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1358 		     | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1359 		     | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1360 		     | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1361 		     | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1362 				      PXLY_RC_VLAN_FILTER)
1363 		     | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1364 
1365 	for (i = 0; i < port->num_mcs; i++)
1366 		if (use_mcs)
1367 			cb0->default_qpn_arr[i] =
1368 				port->port_res[i].qp->init_attr.qp_nr;
1369 		else
1370 			cb0->default_qpn_arr[i] =
1371 				port->port_res[0].qp->init_attr.qp_nr;
1372 
1373 	if (netif_msg_ifup(port))
1374 		ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1375 
1376 	mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1377 	     | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1378 
1379 	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1380 				       port->logical_port_id,
1381 				       H_PORT_CB0, mask, cb0);
1382 	ret = -EIO;
1383 	if (hret != H_SUCCESS)
1384 		goto out_free;
1385 
1386 	ret = 0;
1387 
1388 out_free:
1389 	free_page((unsigned long)cb0);
1390 out:
1391 	return ret;
1392 }
1393 
1394 static int ehea_gen_smrs(struct ehea_port_res *pr)
1395 {
1396 	int ret;
1397 	struct ehea_adapter *adapter = pr->port->adapter;
1398 
1399 	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1400 	if (ret)
1401 		goto out;
1402 
1403 	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1404 	if (ret)
1405 		goto out_free;
1406 
1407 	return 0;
1408 
1409 out_free:
1410 	ehea_rem_mr(&pr->send_mr);
1411 out:
1412 	pr_err("Generating SMRS failed\n");
1413 	return -EIO;
1414 }
1415 
1416 static int ehea_rem_smrs(struct ehea_port_res *pr)
1417 {
1418 	if ((ehea_rem_mr(&pr->send_mr)) ||
1419 	    (ehea_rem_mr(&pr->recv_mr)))
1420 		return -EIO;
1421 	else
1422 		return 0;
1423 }
1424 
1425 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1426 {
1427 	int arr_size = sizeof(void *) * max_q_entries;
1428 
1429 	q_skba->arr = vzalloc(arr_size);
1430 	if (!q_skba->arr)
1431 		return -ENOMEM;
1432 
1433 	q_skba->len = max_q_entries;
1434 	q_skba->index = 0;
1435 	q_skba->os_skbs = 0;
1436 
1437 	return 0;
1438 }
1439 
1440 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1441 			      struct port_res_cfg *pr_cfg, int queue_token)
1442 {
1443 	struct ehea_adapter *adapter = port->adapter;
1444 	enum ehea_eq_type eq_type = EHEA_EQ;
1445 	struct ehea_qp_init_attr *init_attr = NULL;
1446 	int ret = -EIO;
1447 	u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1448 
1449 	tx_bytes = pr->tx_bytes;
1450 	tx_packets = pr->tx_packets;
1451 	rx_bytes = pr->rx_bytes;
1452 	rx_packets = pr->rx_packets;
1453 
1454 	memset(pr, 0, sizeof(struct ehea_port_res));
1455 
1456 	pr->tx_bytes = tx_bytes;
1457 	pr->tx_packets = tx_packets;
1458 	pr->rx_bytes = rx_bytes;
1459 	pr->rx_packets = rx_packets;
1460 
1461 	pr->port = port;
1462 
1463 	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1464 	if (!pr->eq) {
1465 		pr_err("create_eq failed (eq)\n");
1466 		goto out_free;
1467 	}
1468 
1469 	pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1470 				     pr->eq->fw_handle,
1471 				     port->logical_port_id);
1472 	if (!pr->recv_cq) {
1473 		pr_err("create_cq failed (cq_recv)\n");
1474 		goto out_free;
1475 	}
1476 
1477 	pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1478 				     pr->eq->fw_handle,
1479 				     port->logical_port_id);
1480 	if (!pr->send_cq) {
1481 		pr_err("create_cq failed (cq_send)\n");
1482 		goto out_free;
1483 	}
1484 
1485 	if (netif_msg_ifup(port))
1486 		pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1487 			pr->send_cq->attr.act_nr_of_cqes,
1488 			pr->recv_cq->attr.act_nr_of_cqes);
1489 
1490 	init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1491 	if (!init_attr) {
1492 		ret = -ENOMEM;
1493 		pr_err("no mem for ehea_qp_init_attr\n");
1494 		goto out_free;
1495 	}
1496 
1497 	init_attr->low_lat_rq1 = 1;
1498 	init_attr->signalingtype = 1;	/* generate CQE if specified in WQE */
1499 	init_attr->rq_count = 3;
1500 	init_attr->qp_token = queue_token;
1501 	init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1502 	init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1503 	init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1504 	init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1505 	init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1506 	init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1507 	init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1508 	init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1509 	init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1510 	init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1511 	init_attr->port_nr = port->logical_port_id;
1512 	init_attr->send_cq_handle = pr->send_cq->fw_handle;
1513 	init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1514 	init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1515 
1516 	pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1517 	if (!pr->qp) {
1518 		pr_err("create_qp failed\n");
1519 		ret = -EIO;
1520 		goto out_free;
1521 	}
1522 
1523 	if (netif_msg_ifup(port))
1524 		pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1525 			init_attr->qp_nr,
1526 			init_attr->act_nr_send_wqes,
1527 			init_attr->act_nr_rwqes_rq1,
1528 			init_attr->act_nr_rwqes_rq2,
1529 			init_attr->act_nr_rwqes_rq3);
1530 
1531 	pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1532 
1533 	ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1534 	ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1535 	ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1536 	ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1537 	if (ret)
1538 		goto out_free;
1539 
1540 	pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1541 	if (ehea_gen_smrs(pr) != 0) {
1542 		ret = -EIO;
1543 		goto out_free;
1544 	}
1545 
1546 	atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1547 
1548 	kfree(init_attr);
1549 
1550 	netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll);
1551 
1552 	ret = 0;
1553 	goto out;
1554 
1555 out_free:
1556 	kfree(init_attr);
1557 	vfree(pr->sq_skba.arr);
1558 	vfree(pr->rq1_skba.arr);
1559 	vfree(pr->rq2_skba.arr);
1560 	vfree(pr->rq3_skba.arr);
1561 	ehea_destroy_qp(pr->qp);
1562 	ehea_destroy_cq(pr->send_cq);
1563 	ehea_destroy_cq(pr->recv_cq);
1564 	ehea_destroy_eq(pr->eq);
1565 out:
1566 	return ret;
1567 }
1568 
1569 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1570 {
1571 	int ret, i;
1572 
1573 	if (pr->qp)
1574 		netif_napi_del(&pr->napi);
1575 
1576 	ret = ehea_destroy_qp(pr->qp);
1577 
1578 	if (!ret) {
1579 		ehea_destroy_cq(pr->send_cq);
1580 		ehea_destroy_cq(pr->recv_cq);
1581 		ehea_destroy_eq(pr->eq);
1582 
1583 		for (i = 0; i < pr->rq1_skba.len; i++)
1584 			dev_kfree_skb(pr->rq1_skba.arr[i]);
1585 
1586 		for (i = 0; i < pr->rq2_skba.len; i++)
1587 			dev_kfree_skb(pr->rq2_skba.arr[i]);
1588 
1589 		for (i = 0; i < pr->rq3_skba.len; i++)
1590 			dev_kfree_skb(pr->rq3_skba.arr[i]);
1591 
1592 		for (i = 0; i < pr->sq_skba.len; i++)
1593 			dev_kfree_skb(pr->sq_skba.arr[i]);
1594 
1595 		vfree(pr->rq1_skba.arr);
1596 		vfree(pr->rq2_skba.arr);
1597 		vfree(pr->rq3_skba.arr);
1598 		vfree(pr->sq_skba.arr);
1599 		ret = ehea_rem_smrs(pr);
1600 	}
1601 	return ret;
1602 }
1603 
1604 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1605 				  u32 lkey)
1606 {
1607 	int skb_data_size = skb_headlen(skb);
1608 	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1609 	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1610 	unsigned int immediate_len = SWQE2_MAX_IMM;
1611 
1612 	swqe->descriptors = 0;
1613 
1614 	if (skb_is_gso(skb)) {
1615 		swqe->tx_control |= EHEA_SWQE_TSO;
1616 		swqe->mss = skb_shinfo(skb)->gso_size;
1617 		/*
1618 		 * For TSO packets we only copy the headers into the
1619 		 * immediate area.
1620 		 */
1621 		immediate_len = skb_tcp_all_headers(skb);
1622 	}
1623 
1624 	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1625 		skb_copy_from_linear_data(skb, imm_data, immediate_len);
1626 		swqe->immediate_data_length = immediate_len;
1627 
1628 		if (skb_data_size > immediate_len) {
1629 			sg1entry->l_key = lkey;
1630 			sg1entry->len = skb_data_size - immediate_len;
1631 			sg1entry->vaddr =
1632 				ehea_map_vaddr(skb->data + immediate_len);
1633 			swqe->descriptors++;
1634 		}
1635 	} else {
1636 		skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1637 		swqe->immediate_data_length = skb_data_size;
1638 	}
1639 }
1640 
1641 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1642 				    struct ehea_swqe *swqe, u32 lkey)
1643 {
1644 	struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1645 	skb_frag_t *frag;
1646 	int nfrags, sg1entry_contains_frag_data, i;
1647 
1648 	nfrags = skb_shinfo(skb)->nr_frags;
1649 	sg1entry = &swqe->u.immdata_desc.sg_entry;
1650 	sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1651 	sg1entry_contains_frag_data = 0;
1652 
1653 	write_swqe2_immediate(skb, swqe, lkey);
1654 
1655 	/* write descriptors */
1656 	if (nfrags > 0) {
1657 		if (swqe->descriptors == 0) {
1658 			/* sg1entry not yet used */
1659 			frag = &skb_shinfo(skb)->frags[0];
1660 
1661 			/* copy sg1entry data */
1662 			sg1entry->l_key = lkey;
1663 			sg1entry->len = skb_frag_size(frag);
1664 			sg1entry->vaddr =
1665 				ehea_map_vaddr(skb_frag_address(frag));
1666 			swqe->descriptors++;
1667 			sg1entry_contains_frag_data = 1;
1668 		}
1669 
1670 		for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1671 
1672 			frag = &skb_shinfo(skb)->frags[i];
1673 			sgentry = &sg_list[i - sg1entry_contains_frag_data];
1674 
1675 			sgentry->l_key = lkey;
1676 			sgentry->len = skb_frag_size(frag);
1677 			sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1678 			swqe->descriptors++;
1679 		}
1680 	}
1681 }
1682 
1683 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1684 {
1685 	int ret = 0;
1686 	u64 hret;
1687 	u8 reg_type;
1688 
1689 	/* De/Register untagged packets */
1690 	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1691 	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1692 				     port->logical_port_id,
1693 				     reg_type, port->mac_addr, 0, hcallid);
1694 	if (hret != H_SUCCESS) {
1695 		pr_err("%sregistering bc address failed (tagged)\n",
1696 		       hcallid == H_REG_BCMC ? "" : "de");
1697 		ret = -EIO;
1698 		goto out_herr;
1699 	}
1700 
1701 	/* De/Register VLAN packets */
1702 	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1703 	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1704 				     port->logical_port_id,
1705 				     reg_type, port->mac_addr, 0, hcallid);
1706 	if (hret != H_SUCCESS) {
1707 		pr_err("%sregistering bc address failed (vlan)\n",
1708 		       hcallid == H_REG_BCMC ? "" : "de");
1709 		ret = -EIO;
1710 	}
1711 out_herr:
1712 	return ret;
1713 }
1714 
1715 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1716 {
1717 	struct ehea_port *port = netdev_priv(dev);
1718 	struct sockaddr *mac_addr = sa;
1719 	struct hcp_ehea_port_cb0 *cb0;
1720 	int ret;
1721 	u64 hret;
1722 
1723 	if (!is_valid_ether_addr(mac_addr->sa_data)) {
1724 		ret = -EADDRNOTAVAIL;
1725 		goto out;
1726 	}
1727 
1728 	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1729 	if (!cb0) {
1730 		pr_err("no mem for cb0\n");
1731 		ret = -ENOMEM;
1732 		goto out;
1733 	}
1734 
1735 	memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1736 
1737 	cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1738 
1739 	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1740 				       port->logical_port_id, H_PORT_CB0,
1741 				       EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1742 	if (hret != H_SUCCESS) {
1743 		ret = -EIO;
1744 		goto out_free;
1745 	}
1746 
1747 	eth_hw_addr_set(dev, mac_addr->sa_data);
1748 
1749 	/* Deregister old MAC in pHYP */
1750 	if (port->state == EHEA_PORT_UP) {
1751 		ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1752 		if (ret)
1753 			goto out_upregs;
1754 	}
1755 
1756 	port->mac_addr = cb0->port_mac_addr << 16;
1757 
1758 	/* Register new MAC in pHYP */
1759 	if (port->state == EHEA_PORT_UP) {
1760 		ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1761 		if (ret)
1762 			goto out_upregs;
1763 	}
1764 
1765 	ret = 0;
1766 
1767 out_upregs:
1768 	ehea_update_bcmc_registrations();
1769 out_free:
1770 	free_page((unsigned long)cb0);
1771 out:
1772 	return ret;
1773 }
1774 
1775 static void ehea_promiscuous_error(u64 hret, int enable)
1776 {
1777 	if (hret == H_AUTHORITY)
1778 		pr_info("Hypervisor denied %sabling promiscuous mode\n",
1779 			enable == 1 ? "en" : "dis");
1780 	else
1781 		pr_err("failed %sabling promiscuous mode\n",
1782 		       enable == 1 ? "en" : "dis");
1783 }
1784 
1785 static void ehea_promiscuous(struct net_device *dev, int enable)
1786 {
1787 	struct ehea_port *port = netdev_priv(dev);
1788 	struct hcp_ehea_port_cb7 *cb7;
1789 	u64 hret;
1790 
1791 	if (enable == port->promisc)
1792 		return;
1793 
1794 	cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1795 	if (!cb7) {
1796 		pr_err("no mem for cb7\n");
1797 		goto out;
1798 	}
1799 
1800 	/* Modify Pxs_DUCQPN in CB7 */
1801 	cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1802 
1803 	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1804 				       port->logical_port_id,
1805 				       H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1806 	if (hret) {
1807 		ehea_promiscuous_error(hret, enable);
1808 		goto out;
1809 	}
1810 
1811 	port->promisc = enable;
1812 out:
1813 	free_page((unsigned long)cb7);
1814 }
1815 
1816 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1817 				     u32 hcallid)
1818 {
1819 	u64 hret;
1820 	u8 reg_type;
1821 
1822 	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1823 	if (mc_mac_addr == 0)
1824 		reg_type |= EHEA_BCMC_SCOPE_ALL;
1825 
1826 	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1827 				     port->logical_port_id,
1828 				     reg_type, mc_mac_addr, 0, hcallid);
1829 	if (hret)
1830 		goto out;
1831 
1832 	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1833 	if (mc_mac_addr == 0)
1834 		reg_type |= EHEA_BCMC_SCOPE_ALL;
1835 
1836 	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1837 				     port->logical_port_id,
1838 				     reg_type, mc_mac_addr, 0, hcallid);
1839 out:
1840 	return hret;
1841 }
1842 
1843 static int ehea_drop_multicast_list(struct net_device *dev)
1844 {
1845 	struct ehea_port *port = netdev_priv(dev);
1846 	struct ehea_mc_list *mc_entry = port->mc_list;
1847 	struct list_head *pos;
1848 	struct list_head *temp;
1849 	int ret = 0;
1850 	u64 hret;
1851 
1852 	list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1853 		mc_entry = list_entry(pos, struct ehea_mc_list, list);
1854 
1855 		hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1856 						 H_DEREG_BCMC);
1857 		if (hret) {
1858 			pr_err("failed deregistering mcast MAC\n");
1859 			ret = -EIO;
1860 		}
1861 
1862 		list_del(pos);
1863 		kfree(mc_entry);
1864 	}
1865 	return ret;
1866 }
1867 
1868 static void ehea_allmulti(struct net_device *dev, int enable)
1869 {
1870 	struct ehea_port *port = netdev_priv(dev);
1871 	u64 hret;
1872 
1873 	if (!port->allmulti) {
1874 		if (enable) {
1875 			/* Enable ALLMULTI */
1876 			ehea_drop_multicast_list(dev);
1877 			hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1878 			if (!hret)
1879 				port->allmulti = 1;
1880 			else
1881 				netdev_err(dev,
1882 					   "failed enabling IFF_ALLMULTI\n");
1883 		}
1884 	} else {
1885 		if (!enable) {
1886 			/* Disable ALLMULTI */
1887 			hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1888 			if (!hret)
1889 				port->allmulti = 0;
1890 			else
1891 				netdev_err(dev,
1892 					   "failed disabling IFF_ALLMULTI\n");
1893 		}
1894 	}
1895 }
1896 
1897 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1898 {
1899 	struct ehea_mc_list *ehea_mcl_entry;
1900 	u64 hret;
1901 
1902 	ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1903 	if (!ehea_mcl_entry)
1904 		return;
1905 
1906 	INIT_LIST_HEAD(&ehea_mcl_entry->list);
1907 
1908 	memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1909 
1910 	hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1911 					 H_REG_BCMC);
1912 	if (!hret)
1913 		list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1914 	else {
1915 		pr_err("failed registering mcast MAC\n");
1916 		kfree(ehea_mcl_entry);
1917 	}
1918 }
1919 
1920 static void ehea_set_multicast_list(struct net_device *dev)
1921 {
1922 	struct ehea_port *port = netdev_priv(dev);
1923 	struct netdev_hw_addr *ha;
1924 	int ret;
1925 
1926 	ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1927 
1928 	if (dev->flags & IFF_ALLMULTI) {
1929 		ehea_allmulti(dev, 1);
1930 		goto out;
1931 	}
1932 	ehea_allmulti(dev, 0);
1933 
1934 	if (!netdev_mc_empty(dev)) {
1935 		ret = ehea_drop_multicast_list(dev);
1936 		if (ret) {
1937 			/* Dropping the current multicast list failed.
1938 			 * Enabling ALL_MULTI is the best we can do.
1939 			 */
1940 			ehea_allmulti(dev, 1);
1941 		}
1942 
1943 		if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1944 			pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1945 				port->adapter->max_mc_mac);
1946 			goto out;
1947 		}
1948 
1949 		netdev_for_each_mc_addr(ha, dev)
1950 			ehea_add_multicast_entry(port, ha->addr);
1951 
1952 	}
1953 out:
1954 	ehea_update_bcmc_registrations();
1955 }
1956 
1957 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1958 {
1959 	swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1960 
1961 	if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1962 		return;
1963 
1964 	if (skb->ip_summed == CHECKSUM_PARTIAL)
1965 		swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1966 
1967 	swqe->ip_start = skb_network_offset(skb);
1968 	swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1969 
1970 	switch (ip_hdr(skb)->protocol) {
1971 	case IPPROTO_UDP:
1972 		if (skb->ip_summed == CHECKSUM_PARTIAL)
1973 			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1974 
1975 		swqe->tcp_offset = swqe->ip_end + 1 +
1976 				   offsetof(struct udphdr, check);
1977 		break;
1978 
1979 	case IPPROTO_TCP:
1980 		if (skb->ip_summed == CHECKSUM_PARTIAL)
1981 			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1982 
1983 		swqe->tcp_offset = swqe->ip_end + 1 +
1984 				   offsetof(struct tcphdr, check);
1985 		break;
1986 	}
1987 }
1988 
1989 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1990 		       struct ehea_swqe *swqe, u32 lkey)
1991 {
1992 	swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
1993 
1994 	xmit_common(skb, swqe);
1995 
1996 	write_swqe2_data(skb, dev, swqe, lkey);
1997 }
1998 
1999 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2000 		       struct ehea_swqe *swqe)
2001 {
2002 	u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2003 
2004 	xmit_common(skb, swqe);
2005 
2006 	if (!skb->data_len)
2007 		skb_copy_from_linear_data(skb, imm_data, skb->len);
2008 	else
2009 		skb_copy_bits(skb, 0, imm_data, skb->len);
2010 
2011 	swqe->immediate_data_length = skb->len;
2012 	dev_consume_skb_any(skb);
2013 }
2014 
2015 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2016 {
2017 	struct ehea_port *port = netdev_priv(dev);
2018 	struct ehea_swqe *swqe;
2019 	u32 lkey;
2020 	int swqe_index;
2021 	struct ehea_port_res *pr;
2022 	struct netdev_queue *txq;
2023 
2024 	pr = &port->port_res[skb_get_queue_mapping(skb)];
2025 	txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2026 
2027 	swqe = ehea_get_swqe(pr->qp, &swqe_index);
2028 	memset(swqe, 0, SWQE_HEADER_SIZE);
2029 	atomic_dec(&pr->swqe_avail);
2030 
2031 	if (skb_vlan_tag_present(skb)) {
2032 		swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2033 		swqe->vlan_tag = skb_vlan_tag_get(skb);
2034 	}
2035 
2036 	pr->tx_packets++;
2037 	pr->tx_bytes += skb->len;
2038 
2039 	if (skb->len <= SWQE3_MAX_IMM) {
2040 		u32 sig_iv = port->sig_comp_iv;
2041 		u32 swqe_num = pr->swqe_id_counter;
2042 		ehea_xmit3(skb, dev, swqe);
2043 		swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2044 			| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2045 		if (pr->swqe_ll_count >= (sig_iv - 1)) {
2046 			swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2047 						      sig_iv);
2048 			swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2049 			pr->swqe_ll_count = 0;
2050 		} else
2051 			pr->swqe_ll_count += 1;
2052 	} else {
2053 		swqe->wr_id =
2054 			EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2055 		      | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2056 		      | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2057 		      | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2058 		pr->sq_skba.arr[pr->sq_skba.index] = skb;
2059 
2060 		pr->sq_skba.index++;
2061 		pr->sq_skba.index &= (pr->sq_skba.len - 1);
2062 
2063 		lkey = pr->send_mr.lkey;
2064 		ehea_xmit2(skb, dev, swqe, lkey);
2065 		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2066 	}
2067 	pr->swqe_id_counter += 1;
2068 
2069 	netif_info(port, tx_queued, dev,
2070 		   "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2071 	if (netif_msg_tx_queued(port))
2072 		ehea_dump(swqe, 512, "swqe");
2073 
2074 	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2075 		netif_tx_stop_queue(txq);
2076 		swqe->tx_control |= EHEA_SWQE_PURGE;
2077 	}
2078 
2079 	ehea_post_swqe(pr->qp, swqe);
2080 
2081 	if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2082 		pr->p_stats.queue_stopped++;
2083 		netif_tx_stop_queue(txq);
2084 	}
2085 
2086 	return NETDEV_TX_OK;
2087 }
2088 
2089 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2090 {
2091 	struct ehea_port *port = netdev_priv(dev);
2092 	struct ehea_adapter *adapter = port->adapter;
2093 	struct hcp_ehea_port_cb1 *cb1;
2094 	int index;
2095 	u64 hret;
2096 	int err = 0;
2097 
2098 	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2099 	if (!cb1) {
2100 		pr_err("no mem for cb1\n");
2101 		err = -ENOMEM;
2102 		goto out;
2103 	}
2104 
2105 	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2106 				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2107 	if (hret != H_SUCCESS) {
2108 		pr_err("query_ehea_port failed\n");
2109 		err = -EINVAL;
2110 		goto out;
2111 	}
2112 
2113 	index = (vid / 64);
2114 	cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2115 
2116 	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2117 				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2118 	if (hret != H_SUCCESS) {
2119 		pr_err("modify_ehea_port failed\n");
2120 		err = -EINVAL;
2121 	}
2122 out:
2123 	free_page((unsigned long)cb1);
2124 	return err;
2125 }
2126 
2127 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2128 {
2129 	struct ehea_port *port = netdev_priv(dev);
2130 	struct ehea_adapter *adapter = port->adapter;
2131 	struct hcp_ehea_port_cb1 *cb1;
2132 	int index;
2133 	u64 hret;
2134 	int err = 0;
2135 
2136 	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2137 	if (!cb1) {
2138 		pr_err("no mem for cb1\n");
2139 		err = -ENOMEM;
2140 		goto out;
2141 	}
2142 
2143 	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2144 				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2145 	if (hret != H_SUCCESS) {
2146 		pr_err("query_ehea_port failed\n");
2147 		err = -EINVAL;
2148 		goto out;
2149 	}
2150 
2151 	index = (vid / 64);
2152 	cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2153 
2154 	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2155 				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2156 	if (hret != H_SUCCESS) {
2157 		pr_err("modify_ehea_port failed\n");
2158 		err = -EINVAL;
2159 	}
2160 out:
2161 	free_page((unsigned long)cb1);
2162 	return err;
2163 }
2164 
2165 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2166 {
2167 	int ret = -EIO;
2168 	u64 hret;
2169 	u16 dummy16 = 0;
2170 	u64 dummy64 = 0;
2171 	struct hcp_modify_qp_cb0 *cb0;
2172 
2173 	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2174 	if (!cb0) {
2175 		ret = -ENOMEM;
2176 		goto out;
2177 	}
2178 
2179 	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2180 				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2181 	if (hret != H_SUCCESS) {
2182 		pr_err("query_ehea_qp failed (1)\n");
2183 		goto out;
2184 	}
2185 
2186 	cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2187 	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2188 				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2189 				     &dummy64, &dummy64, &dummy16, &dummy16);
2190 	if (hret != H_SUCCESS) {
2191 		pr_err("modify_ehea_qp failed (1)\n");
2192 		goto out;
2193 	}
2194 
2195 	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2196 				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2197 	if (hret != H_SUCCESS) {
2198 		pr_err("query_ehea_qp failed (2)\n");
2199 		goto out;
2200 	}
2201 
2202 	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2203 	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2204 				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2205 				     &dummy64, &dummy64, &dummy16, &dummy16);
2206 	if (hret != H_SUCCESS) {
2207 		pr_err("modify_ehea_qp failed (2)\n");
2208 		goto out;
2209 	}
2210 
2211 	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2212 				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2213 	if (hret != H_SUCCESS) {
2214 		pr_err("query_ehea_qp failed (3)\n");
2215 		goto out;
2216 	}
2217 
2218 	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2219 	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2220 				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2221 				     &dummy64, &dummy64, &dummy16, &dummy16);
2222 	if (hret != H_SUCCESS) {
2223 		pr_err("modify_ehea_qp failed (3)\n");
2224 		goto out;
2225 	}
2226 
2227 	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2228 				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2229 	if (hret != H_SUCCESS) {
2230 		pr_err("query_ehea_qp failed (4)\n");
2231 		goto out;
2232 	}
2233 
2234 	ret = 0;
2235 out:
2236 	free_page((unsigned long)cb0);
2237 	return ret;
2238 }
2239 
2240 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2241 {
2242 	int ret, i;
2243 	struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2244 	enum ehea_eq_type eq_type = EHEA_EQ;
2245 
2246 	port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2247 				   EHEA_MAX_ENTRIES_EQ, 1);
2248 	if (!port->qp_eq) {
2249 		ret = -EINVAL;
2250 		pr_err("ehea_create_eq failed (qp_eq)\n");
2251 		goto out_kill_eq;
2252 	}
2253 
2254 	pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2255 	pr_cfg.max_entries_scq = sq_entries * 2;
2256 	pr_cfg.max_entries_sq = sq_entries;
2257 	pr_cfg.max_entries_rq1 = rq1_entries;
2258 	pr_cfg.max_entries_rq2 = rq2_entries;
2259 	pr_cfg.max_entries_rq3 = rq3_entries;
2260 
2261 	pr_cfg_small_rx.max_entries_rcq = 1;
2262 	pr_cfg_small_rx.max_entries_scq = sq_entries;
2263 	pr_cfg_small_rx.max_entries_sq = sq_entries;
2264 	pr_cfg_small_rx.max_entries_rq1 = 1;
2265 	pr_cfg_small_rx.max_entries_rq2 = 1;
2266 	pr_cfg_small_rx.max_entries_rq3 = 1;
2267 
2268 	for (i = 0; i < def_qps; i++) {
2269 		ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2270 		if (ret)
2271 			goto out_clean_pr;
2272 	}
2273 	for (i = def_qps; i < def_qps; i++) {
2274 		ret = ehea_init_port_res(port, &port->port_res[i],
2275 					 &pr_cfg_small_rx, i);
2276 		if (ret)
2277 			goto out_clean_pr;
2278 	}
2279 
2280 	return 0;
2281 
2282 out_clean_pr:
2283 	while (--i >= 0)
2284 		ehea_clean_portres(port, &port->port_res[i]);
2285 
2286 out_kill_eq:
2287 	ehea_destroy_eq(port->qp_eq);
2288 	return ret;
2289 }
2290 
2291 static int ehea_clean_all_portres(struct ehea_port *port)
2292 {
2293 	int ret = 0;
2294 	int i;
2295 
2296 	for (i = 0; i < port->num_def_qps; i++)
2297 		ret |= ehea_clean_portres(port, &port->port_res[i]);
2298 
2299 	ret |= ehea_destroy_eq(port->qp_eq);
2300 
2301 	return ret;
2302 }
2303 
2304 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2305 {
2306 	if (adapter->active_ports)
2307 		return;
2308 
2309 	ehea_rem_mr(&adapter->mr);
2310 }
2311 
2312 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2313 {
2314 	if (adapter->active_ports)
2315 		return 0;
2316 
2317 	return ehea_reg_kernel_mr(adapter, &adapter->mr);
2318 }
2319 
2320 static int ehea_up(struct net_device *dev)
2321 {
2322 	int ret, i;
2323 	struct ehea_port *port = netdev_priv(dev);
2324 
2325 	if (port->state == EHEA_PORT_UP)
2326 		return 0;
2327 
2328 	ret = ehea_port_res_setup(port, port->num_def_qps);
2329 	if (ret) {
2330 		netdev_err(dev, "port_res_failed\n");
2331 		goto out;
2332 	}
2333 
2334 	/* Set default QP for this port */
2335 	ret = ehea_configure_port(port);
2336 	if (ret) {
2337 		netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2338 		goto out_clean_pr;
2339 	}
2340 
2341 	ret = ehea_reg_interrupts(dev);
2342 	if (ret) {
2343 		netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2344 		goto out_clean_pr;
2345 	}
2346 
2347 	for (i = 0; i < port->num_def_qps; i++) {
2348 		ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2349 		if (ret) {
2350 			netdev_err(dev, "activate_qp failed\n");
2351 			goto out_free_irqs;
2352 		}
2353 	}
2354 
2355 	for (i = 0; i < port->num_def_qps; i++) {
2356 		ret = ehea_fill_port_res(&port->port_res[i]);
2357 		if (ret) {
2358 			netdev_err(dev, "out_free_irqs\n");
2359 			goto out_free_irqs;
2360 		}
2361 	}
2362 
2363 	ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2364 	if (ret) {
2365 		ret = -EIO;
2366 		goto out_free_irqs;
2367 	}
2368 
2369 	port->state = EHEA_PORT_UP;
2370 
2371 	ret = 0;
2372 	goto out;
2373 
2374 out_free_irqs:
2375 	ehea_free_interrupts(dev);
2376 
2377 out_clean_pr:
2378 	ehea_clean_all_portres(port);
2379 out:
2380 	if (ret)
2381 		netdev_info(dev, "Failed starting. ret=%i\n", ret);
2382 
2383 	ehea_update_bcmc_registrations();
2384 	ehea_update_firmware_handles();
2385 
2386 	return ret;
2387 }
2388 
2389 static void port_napi_disable(struct ehea_port *port)
2390 {
2391 	int i;
2392 
2393 	for (i = 0; i < port->num_def_qps; i++)
2394 		napi_disable(&port->port_res[i].napi);
2395 }
2396 
2397 static void port_napi_enable(struct ehea_port *port)
2398 {
2399 	int i;
2400 
2401 	for (i = 0; i < port->num_def_qps; i++)
2402 		napi_enable(&port->port_res[i].napi);
2403 }
2404 
2405 static int ehea_open(struct net_device *dev)
2406 {
2407 	int ret;
2408 	struct ehea_port *port = netdev_priv(dev);
2409 
2410 	mutex_lock(&port->port_lock);
2411 
2412 	netif_info(port, ifup, dev, "enabling port\n");
2413 
2414 	netif_carrier_off(dev);
2415 
2416 	ret = ehea_up(dev);
2417 	if (!ret) {
2418 		port_napi_enable(port);
2419 		netif_tx_start_all_queues(dev);
2420 	}
2421 
2422 	mutex_unlock(&port->port_lock);
2423 	schedule_delayed_work(&port->stats_work,
2424 			      round_jiffies_relative(msecs_to_jiffies(1000)));
2425 
2426 	return ret;
2427 }
2428 
2429 static int ehea_down(struct net_device *dev)
2430 {
2431 	int ret;
2432 	struct ehea_port *port = netdev_priv(dev);
2433 
2434 	if (port->state == EHEA_PORT_DOWN)
2435 		return 0;
2436 
2437 	ehea_drop_multicast_list(dev);
2438 	ehea_allmulti(dev, 0);
2439 	ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2440 
2441 	ehea_free_interrupts(dev);
2442 
2443 	port->state = EHEA_PORT_DOWN;
2444 
2445 	ehea_update_bcmc_registrations();
2446 
2447 	ret = ehea_clean_all_portres(port);
2448 	if (ret)
2449 		netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2450 
2451 	ehea_update_firmware_handles();
2452 
2453 	return ret;
2454 }
2455 
2456 static int ehea_stop(struct net_device *dev)
2457 {
2458 	int ret;
2459 	struct ehea_port *port = netdev_priv(dev);
2460 
2461 	netif_info(port, ifdown, dev, "disabling port\n");
2462 
2463 	set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2464 	cancel_work_sync(&port->reset_task);
2465 	cancel_delayed_work_sync(&port->stats_work);
2466 	mutex_lock(&port->port_lock);
2467 	netif_tx_stop_all_queues(dev);
2468 	port_napi_disable(port);
2469 	ret = ehea_down(dev);
2470 	mutex_unlock(&port->port_lock);
2471 	clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2472 	return ret;
2473 }
2474 
2475 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2476 {
2477 	struct ehea_qp qp = *orig_qp;
2478 	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2479 	struct ehea_swqe *swqe;
2480 	int wqe_index;
2481 	int i;
2482 
2483 	for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2484 		swqe = ehea_get_swqe(&qp, &wqe_index);
2485 		swqe->tx_control |= EHEA_SWQE_PURGE;
2486 	}
2487 }
2488 
2489 static void ehea_flush_sq(struct ehea_port *port)
2490 {
2491 	int i;
2492 
2493 	for (i = 0; i < port->num_def_qps; i++) {
2494 		struct ehea_port_res *pr = &port->port_res[i];
2495 		int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2496 		int ret;
2497 
2498 		ret = wait_event_timeout(port->swqe_avail_wq,
2499 			 atomic_read(&pr->swqe_avail) >= swqe_max,
2500 			 msecs_to_jiffies(100));
2501 
2502 		if (!ret) {
2503 			pr_err("WARNING: sq not flushed completely\n");
2504 			break;
2505 		}
2506 	}
2507 }
2508 
2509 static int ehea_stop_qps(struct net_device *dev)
2510 {
2511 	struct ehea_port *port = netdev_priv(dev);
2512 	struct ehea_adapter *adapter = port->adapter;
2513 	struct hcp_modify_qp_cb0 *cb0;
2514 	int ret = -EIO;
2515 	int dret;
2516 	int i;
2517 	u64 hret;
2518 	u64 dummy64 = 0;
2519 	u16 dummy16 = 0;
2520 
2521 	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2522 	if (!cb0) {
2523 		ret = -ENOMEM;
2524 		goto out;
2525 	}
2526 
2527 	for (i = 0; i < (port->num_def_qps); i++) {
2528 		struct ehea_port_res *pr =  &port->port_res[i];
2529 		struct ehea_qp *qp = pr->qp;
2530 
2531 		/* Purge send queue */
2532 		ehea_purge_sq(qp);
2533 
2534 		/* Disable queue pair */
2535 		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2536 					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2537 					    cb0);
2538 		if (hret != H_SUCCESS) {
2539 			pr_err("query_ehea_qp failed (1)\n");
2540 			goto out;
2541 		}
2542 
2543 		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2544 		cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2545 
2546 		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2547 					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2548 							    1), cb0, &dummy64,
2549 					     &dummy64, &dummy16, &dummy16);
2550 		if (hret != H_SUCCESS) {
2551 			pr_err("modify_ehea_qp failed (1)\n");
2552 			goto out;
2553 		}
2554 
2555 		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2556 					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2557 					    cb0);
2558 		if (hret != H_SUCCESS) {
2559 			pr_err("query_ehea_qp failed (2)\n");
2560 			goto out;
2561 		}
2562 
2563 		/* deregister shared memory regions */
2564 		dret = ehea_rem_smrs(pr);
2565 		if (dret) {
2566 			pr_err("unreg shared memory region failed\n");
2567 			goto out;
2568 		}
2569 	}
2570 
2571 	ret = 0;
2572 out:
2573 	free_page((unsigned long)cb0);
2574 
2575 	return ret;
2576 }
2577 
2578 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2579 {
2580 	struct ehea_qp qp = *orig_qp;
2581 	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2582 	struct ehea_rwqe *rwqe;
2583 	struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2584 	struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2585 	struct sk_buff *skb;
2586 	u32 lkey = pr->recv_mr.lkey;
2587 
2588 
2589 	int i;
2590 	int index;
2591 
2592 	for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2593 		rwqe = ehea_get_next_rwqe(&qp, 2);
2594 		rwqe->sg_list[0].l_key = lkey;
2595 		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2596 		skb = skba_rq2[index];
2597 		if (skb)
2598 			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2599 	}
2600 
2601 	for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2602 		rwqe = ehea_get_next_rwqe(&qp, 3);
2603 		rwqe->sg_list[0].l_key = lkey;
2604 		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2605 		skb = skba_rq3[index];
2606 		if (skb)
2607 			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2608 	}
2609 }
2610 
2611 static int ehea_restart_qps(struct net_device *dev)
2612 {
2613 	struct ehea_port *port = netdev_priv(dev);
2614 	struct ehea_adapter *adapter = port->adapter;
2615 	int ret = 0;
2616 	int i;
2617 
2618 	struct hcp_modify_qp_cb0 *cb0;
2619 	u64 hret;
2620 	u64 dummy64 = 0;
2621 	u16 dummy16 = 0;
2622 
2623 	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2624 	if (!cb0)
2625 		return -ENOMEM;
2626 
2627 	for (i = 0; i < (port->num_def_qps); i++) {
2628 		struct ehea_port_res *pr =  &port->port_res[i];
2629 		struct ehea_qp *qp = pr->qp;
2630 
2631 		ret = ehea_gen_smrs(pr);
2632 		if (ret) {
2633 			netdev_err(dev, "creation of shared memory regions failed\n");
2634 			goto out;
2635 		}
2636 
2637 		ehea_update_rqs(qp, pr);
2638 
2639 		/* Enable queue pair */
2640 		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2641 					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2642 					    cb0);
2643 		if (hret != H_SUCCESS) {
2644 			netdev_err(dev, "query_ehea_qp failed (1)\n");
2645 			ret = -EFAULT;
2646 			goto out;
2647 		}
2648 
2649 		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2650 		cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2651 
2652 		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2653 					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2654 							    1), cb0, &dummy64,
2655 					     &dummy64, &dummy16, &dummy16);
2656 		if (hret != H_SUCCESS) {
2657 			netdev_err(dev, "modify_ehea_qp failed (1)\n");
2658 			ret = -EFAULT;
2659 			goto out;
2660 		}
2661 
2662 		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2663 					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2664 					    cb0);
2665 		if (hret != H_SUCCESS) {
2666 			netdev_err(dev, "query_ehea_qp failed (2)\n");
2667 			ret = -EFAULT;
2668 			goto out;
2669 		}
2670 
2671 		/* refill entire queue */
2672 		ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2673 		ehea_refill_rq2(pr, 0);
2674 		ehea_refill_rq3(pr, 0);
2675 	}
2676 out:
2677 	free_page((unsigned long)cb0);
2678 
2679 	return ret;
2680 }
2681 
2682 static void ehea_reset_port(struct work_struct *work)
2683 {
2684 	int ret;
2685 	struct ehea_port *port =
2686 		container_of(work, struct ehea_port, reset_task);
2687 	struct net_device *dev = port->netdev;
2688 
2689 	mutex_lock(&dlpar_mem_lock);
2690 	port->resets++;
2691 	mutex_lock(&port->port_lock);
2692 	netif_tx_disable(dev);
2693 
2694 	port_napi_disable(port);
2695 
2696 	ehea_down(dev);
2697 
2698 	ret = ehea_up(dev);
2699 	if (ret)
2700 		goto out;
2701 
2702 	ehea_set_multicast_list(dev);
2703 
2704 	netif_info(port, timer, dev, "reset successful\n");
2705 
2706 	port_napi_enable(port);
2707 
2708 	netif_tx_wake_all_queues(dev);
2709 out:
2710 	mutex_unlock(&port->port_lock);
2711 	mutex_unlock(&dlpar_mem_lock);
2712 }
2713 
2714 static void ehea_rereg_mrs(void)
2715 {
2716 	int ret, i;
2717 	struct ehea_adapter *adapter;
2718 
2719 	pr_info("LPAR memory changed - re-initializing driver\n");
2720 
2721 	list_for_each_entry(adapter, &adapter_list, list)
2722 		if (adapter->active_ports) {
2723 			/* Shutdown all ports */
2724 			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2725 				struct ehea_port *port = adapter->port[i];
2726 				struct net_device *dev;
2727 
2728 				if (!port)
2729 					continue;
2730 
2731 				dev = port->netdev;
2732 
2733 				if (dev->flags & IFF_UP) {
2734 					mutex_lock(&port->port_lock);
2735 					netif_tx_disable(dev);
2736 					ehea_flush_sq(port);
2737 					ret = ehea_stop_qps(dev);
2738 					if (ret) {
2739 						mutex_unlock(&port->port_lock);
2740 						goto out;
2741 					}
2742 					port_napi_disable(port);
2743 					mutex_unlock(&port->port_lock);
2744 				}
2745 				reset_sq_restart_flag(port);
2746 			}
2747 
2748 			/* Unregister old memory region */
2749 			ret = ehea_rem_mr(&adapter->mr);
2750 			if (ret) {
2751 				pr_err("unregister MR failed - driver inoperable!\n");
2752 				goto out;
2753 			}
2754 		}
2755 
2756 	clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2757 
2758 	list_for_each_entry(adapter, &adapter_list, list)
2759 		if (adapter->active_ports) {
2760 			/* Register new memory region */
2761 			ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2762 			if (ret) {
2763 				pr_err("register MR failed - driver inoperable!\n");
2764 				goto out;
2765 			}
2766 
2767 			/* Restart all ports */
2768 			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2769 				struct ehea_port *port = adapter->port[i];
2770 
2771 				if (port) {
2772 					struct net_device *dev = port->netdev;
2773 
2774 					if (dev->flags & IFF_UP) {
2775 						mutex_lock(&port->port_lock);
2776 						ret = ehea_restart_qps(dev);
2777 						if (!ret) {
2778 							check_sqs(port);
2779 							port_napi_enable(port);
2780 							netif_tx_wake_all_queues(dev);
2781 						} else {
2782 							netdev_err(dev, "Unable to restart QPS\n");
2783 						}
2784 						mutex_unlock(&port->port_lock);
2785 					}
2786 				}
2787 			}
2788 		}
2789 	pr_info("re-initializing driver complete\n");
2790 out:
2791 	return;
2792 }
2793 
2794 static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue)
2795 {
2796 	struct ehea_port *port = netdev_priv(dev);
2797 
2798 	if (netif_carrier_ok(dev) &&
2799 	    !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2800 		ehea_schedule_port_reset(port);
2801 }
2802 
2803 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2804 {
2805 	struct hcp_query_ehea *cb;
2806 	u64 hret;
2807 	int ret;
2808 
2809 	cb = (void *)get_zeroed_page(GFP_KERNEL);
2810 	if (!cb) {
2811 		ret = -ENOMEM;
2812 		goto out;
2813 	}
2814 
2815 	hret = ehea_h_query_ehea(adapter->handle, cb);
2816 
2817 	if (hret != H_SUCCESS) {
2818 		ret = -EIO;
2819 		goto out_herr;
2820 	}
2821 
2822 	adapter->max_mc_mac = cb->max_mc_mac - 1;
2823 	ret = 0;
2824 
2825 out_herr:
2826 	free_page((unsigned long)cb);
2827 out:
2828 	return ret;
2829 }
2830 
2831 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2832 {
2833 	struct hcp_ehea_port_cb4 *cb4;
2834 	u64 hret;
2835 	int ret = 0;
2836 
2837 	*jumbo = 0;
2838 
2839 	/* (Try to) enable *jumbo frames */
2840 	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2841 	if (!cb4) {
2842 		pr_err("no mem for cb4\n");
2843 		ret = -ENOMEM;
2844 		goto out;
2845 	} else {
2846 		hret = ehea_h_query_ehea_port(port->adapter->handle,
2847 					      port->logical_port_id,
2848 					      H_PORT_CB4,
2849 					      H_PORT_CB4_JUMBO, cb4);
2850 		if (hret == H_SUCCESS) {
2851 			if (cb4->jumbo_frame)
2852 				*jumbo = 1;
2853 			else {
2854 				cb4->jumbo_frame = 1;
2855 				hret = ehea_h_modify_ehea_port(port->adapter->
2856 							       handle,
2857 							       port->
2858 							       logical_port_id,
2859 							       H_PORT_CB4,
2860 							       H_PORT_CB4_JUMBO,
2861 							       cb4);
2862 				if (hret == H_SUCCESS)
2863 					*jumbo = 1;
2864 			}
2865 		} else
2866 			ret = -EINVAL;
2867 
2868 		free_page((unsigned long)cb4);
2869 	}
2870 out:
2871 	return ret;
2872 }
2873 
2874 static ssize_t log_port_id_show(struct device *dev,
2875 				struct device_attribute *attr, char *buf)
2876 {
2877 	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2878 	return sprintf(buf, "%d", port->logical_port_id);
2879 }
2880 
2881 static DEVICE_ATTR_RO(log_port_id);
2882 
2883 static void logical_port_release(struct device *dev)
2884 {
2885 	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2886 	of_node_put(port->ofdev.dev.of_node);
2887 }
2888 
2889 static struct device *ehea_register_port(struct ehea_port *port,
2890 					 struct device_node *dn)
2891 {
2892 	int ret;
2893 
2894 	port->ofdev.dev.of_node = of_node_get(dn);
2895 	port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2896 	port->ofdev.dev.bus = &ibmebus_bus_type;
2897 
2898 	dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2899 	port->ofdev.dev.release = logical_port_release;
2900 
2901 	ret = of_device_register(&port->ofdev);
2902 	if (ret) {
2903 		pr_err("failed to register device. ret=%d\n", ret);
2904 		put_device(&port->ofdev.dev);
2905 		goto out;
2906 	}
2907 
2908 	ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2909 	if (ret) {
2910 		pr_err("failed to register attributes, ret=%d\n", ret);
2911 		goto out_unreg_of_dev;
2912 	}
2913 
2914 	return &port->ofdev.dev;
2915 
2916 out_unreg_of_dev:
2917 	of_device_unregister(&port->ofdev);
2918 out:
2919 	return NULL;
2920 }
2921 
2922 static void ehea_unregister_port(struct ehea_port *port)
2923 {
2924 	device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2925 	of_device_unregister(&port->ofdev);
2926 }
2927 
2928 static const struct net_device_ops ehea_netdev_ops = {
2929 	.ndo_open		= ehea_open,
2930 	.ndo_stop		= ehea_stop,
2931 	.ndo_start_xmit		= ehea_start_xmit,
2932 	.ndo_get_stats64	= ehea_get_stats64,
2933 	.ndo_set_mac_address	= ehea_set_mac_addr,
2934 	.ndo_validate_addr	= eth_validate_addr,
2935 	.ndo_set_rx_mode	= ehea_set_multicast_list,
2936 	.ndo_vlan_rx_add_vid	= ehea_vlan_rx_add_vid,
2937 	.ndo_vlan_rx_kill_vid	= ehea_vlan_rx_kill_vid,
2938 	.ndo_tx_timeout		= ehea_tx_watchdog,
2939 };
2940 
2941 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2942 					 u32 logical_port_id,
2943 					 struct device_node *dn)
2944 {
2945 	int ret;
2946 	struct net_device *dev;
2947 	struct ehea_port *port;
2948 	struct device *port_dev;
2949 	int jumbo;
2950 
2951 	/* allocate memory for the port structures */
2952 	dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2953 
2954 	if (!dev) {
2955 		ret = -ENOMEM;
2956 		goto out_err;
2957 	}
2958 
2959 	port = netdev_priv(dev);
2960 
2961 	mutex_init(&port->port_lock);
2962 	port->state = EHEA_PORT_DOWN;
2963 	port->sig_comp_iv = sq_entries / 10;
2964 
2965 	port->adapter = adapter;
2966 	port->netdev = dev;
2967 	port->logical_port_id = logical_port_id;
2968 
2969 	port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2970 
2971 	port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2972 	if (!port->mc_list) {
2973 		ret = -ENOMEM;
2974 		goto out_free_ethdev;
2975 	}
2976 
2977 	INIT_LIST_HEAD(&port->mc_list->list);
2978 
2979 	ret = ehea_sense_port_attr(port);
2980 	if (ret)
2981 		goto out_free_mc_list;
2982 
2983 	netif_set_real_num_rx_queues(dev, port->num_def_qps);
2984 	netif_set_real_num_tx_queues(dev, port->num_def_qps);
2985 
2986 	port_dev = ehea_register_port(port, dn);
2987 	if (!port_dev)
2988 		goto out_free_mc_list;
2989 
2990 	SET_NETDEV_DEV(dev, port_dev);
2991 
2992 	/* initialize net_device structure */
2993 	eth_hw_addr_set(dev, (u8 *)&port->mac_addr);
2994 
2995 	dev->netdev_ops = &ehea_netdev_ops;
2996 	ehea_set_ethtool_ops(dev);
2997 
2998 	dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
2999 		      NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3000 	dev->features = NETIF_F_SG | NETIF_F_TSO |
3001 		      NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3002 		      NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3003 		      NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3004 	dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3005 			NETIF_F_IP_CSUM;
3006 	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3007 
3008 	/* MTU range: 68 - 9022 */
3009 	dev->min_mtu = ETH_MIN_MTU;
3010 	dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3011 
3012 	INIT_WORK(&port->reset_task, ehea_reset_port);
3013 	INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3014 
3015 	init_waitqueue_head(&port->swqe_avail_wq);
3016 	init_waitqueue_head(&port->restart_wq);
3017 
3018 	ret = register_netdev(dev);
3019 	if (ret) {
3020 		pr_err("register_netdev failed. ret=%d\n", ret);
3021 		goto out_unreg_port;
3022 	}
3023 
3024 	ret = ehea_get_jumboframe_status(port, &jumbo);
3025 	if (ret)
3026 		netdev_err(dev, "failed determining jumbo frame status\n");
3027 
3028 	netdev_info(dev, "Jumbo frames are %sabled\n",
3029 		    jumbo == 1 ? "en" : "dis");
3030 
3031 	adapter->active_ports++;
3032 
3033 	return port;
3034 
3035 out_unreg_port:
3036 	ehea_unregister_port(port);
3037 
3038 out_free_mc_list:
3039 	kfree(port->mc_list);
3040 
3041 out_free_ethdev:
3042 	free_netdev(dev);
3043 
3044 out_err:
3045 	pr_err("setting up logical port with id=%d failed, ret=%d\n",
3046 	       logical_port_id, ret);
3047 	return NULL;
3048 }
3049 
3050 static void ehea_shutdown_single_port(struct ehea_port *port)
3051 {
3052 	struct ehea_adapter *adapter = port->adapter;
3053 
3054 	cancel_work_sync(&port->reset_task);
3055 	cancel_delayed_work_sync(&port->stats_work);
3056 	unregister_netdev(port->netdev);
3057 	ehea_unregister_port(port);
3058 	kfree(port->mc_list);
3059 	free_netdev(port->netdev);
3060 	adapter->active_ports--;
3061 }
3062 
3063 static int ehea_setup_ports(struct ehea_adapter *adapter)
3064 {
3065 	struct device_node *lhea_dn;
3066 	struct device_node *eth_dn = NULL;
3067 
3068 	const u32 *dn_log_port_id;
3069 	int i = 0;
3070 
3071 	lhea_dn = adapter->ofdev->dev.of_node;
3072 	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3073 
3074 		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3075 						 NULL);
3076 		if (!dn_log_port_id) {
3077 			pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3078 			continue;
3079 		}
3080 
3081 		if (ehea_add_adapter_mr(adapter)) {
3082 			pr_err("creating MR failed\n");
3083 			of_node_put(eth_dn);
3084 			return -EIO;
3085 		}
3086 
3087 		adapter->port[i] = ehea_setup_single_port(adapter,
3088 							  *dn_log_port_id,
3089 							  eth_dn);
3090 		if (adapter->port[i])
3091 			netdev_info(adapter->port[i]->netdev,
3092 				    "logical port id #%d\n", *dn_log_port_id);
3093 		else
3094 			ehea_remove_adapter_mr(adapter);
3095 
3096 		i++;
3097 	}
3098 	return 0;
3099 }
3100 
3101 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3102 					   u32 logical_port_id)
3103 {
3104 	struct device_node *lhea_dn;
3105 	struct device_node *eth_dn = NULL;
3106 	const u32 *dn_log_port_id;
3107 
3108 	lhea_dn = adapter->ofdev->dev.of_node;
3109 	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3110 
3111 		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3112 						 NULL);
3113 		if (dn_log_port_id)
3114 			if (*dn_log_port_id == logical_port_id)
3115 				return eth_dn;
3116 	}
3117 
3118 	return NULL;
3119 }
3120 
3121 static ssize_t probe_port_store(struct device *dev,
3122 			       struct device_attribute *attr,
3123 			       const char *buf, size_t count)
3124 {
3125 	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3126 	struct ehea_port *port;
3127 	struct device_node *eth_dn = NULL;
3128 	int i;
3129 
3130 	u32 logical_port_id;
3131 
3132 	sscanf(buf, "%d", &logical_port_id);
3133 
3134 	port = ehea_get_port(adapter, logical_port_id);
3135 
3136 	if (port) {
3137 		netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3138 			    logical_port_id);
3139 		return -EINVAL;
3140 	}
3141 
3142 	eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3143 
3144 	if (!eth_dn) {
3145 		pr_info("no logical port with id %d found\n", logical_port_id);
3146 		return -EINVAL;
3147 	}
3148 
3149 	if (ehea_add_adapter_mr(adapter)) {
3150 		pr_err("creating MR failed\n");
3151 		of_node_put(eth_dn);
3152 		return -EIO;
3153 	}
3154 
3155 	port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3156 
3157 	of_node_put(eth_dn);
3158 
3159 	if (port) {
3160 		for (i = 0; i < EHEA_MAX_PORTS; i++)
3161 			if (!adapter->port[i]) {
3162 				adapter->port[i] = port;
3163 				break;
3164 			}
3165 
3166 		netdev_info(port->netdev, "added: (logical port id=%d)\n",
3167 			    logical_port_id);
3168 	} else {
3169 		ehea_remove_adapter_mr(adapter);
3170 		return -EIO;
3171 	}
3172 
3173 	return (ssize_t) count;
3174 }
3175 
3176 static ssize_t remove_port_store(struct device *dev,
3177 				 struct device_attribute *attr,
3178 				 const char *buf, size_t count)
3179 {
3180 	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3181 	struct ehea_port *port;
3182 	int i;
3183 	u32 logical_port_id;
3184 
3185 	sscanf(buf, "%d", &logical_port_id);
3186 
3187 	port = ehea_get_port(adapter, logical_port_id);
3188 
3189 	if (port) {
3190 		netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3191 			    logical_port_id);
3192 
3193 		ehea_shutdown_single_port(port);
3194 
3195 		for (i = 0; i < EHEA_MAX_PORTS; i++)
3196 			if (adapter->port[i] == port) {
3197 				adapter->port[i] = NULL;
3198 				break;
3199 			}
3200 	} else {
3201 		pr_err("removing port with logical port id=%d failed. port not configured.\n",
3202 		       logical_port_id);
3203 		return -EINVAL;
3204 	}
3205 
3206 	ehea_remove_adapter_mr(adapter);
3207 
3208 	return (ssize_t) count;
3209 }
3210 
3211 static DEVICE_ATTR_WO(probe_port);
3212 static DEVICE_ATTR_WO(remove_port);
3213 
3214 static int ehea_create_device_sysfs(struct platform_device *dev)
3215 {
3216 	int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3217 	if (ret)
3218 		goto out;
3219 
3220 	ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3221 out:
3222 	return ret;
3223 }
3224 
3225 static void ehea_remove_device_sysfs(struct platform_device *dev)
3226 {
3227 	device_remove_file(&dev->dev, &dev_attr_probe_port);
3228 	device_remove_file(&dev->dev, &dev_attr_remove_port);
3229 }
3230 
3231 static int ehea_reboot_notifier(struct notifier_block *nb,
3232 				unsigned long action, void *unused)
3233 {
3234 	if (action == SYS_RESTART) {
3235 		pr_info("Reboot: freeing all eHEA resources\n");
3236 		ibmebus_unregister_driver(&ehea_driver);
3237 	}
3238 	return NOTIFY_DONE;
3239 }
3240 
3241 static struct notifier_block ehea_reboot_nb = {
3242 	.notifier_call = ehea_reboot_notifier,
3243 };
3244 
3245 static int ehea_mem_notifier(struct notifier_block *nb,
3246 			     unsigned long action, void *data)
3247 {
3248 	int ret = NOTIFY_BAD;
3249 	struct memory_notify *arg = data;
3250 
3251 	mutex_lock(&dlpar_mem_lock);
3252 
3253 	switch (action) {
3254 	case MEM_CANCEL_OFFLINE:
3255 		pr_info("memory offlining canceled");
3256 		fallthrough;	/* re-add canceled memory block */
3257 
3258 	case MEM_ONLINE:
3259 		pr_info("memory is going online");
3260 		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3261 		if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3262 			goto out_unlock;
3263 		ehea_rereg_mrs();
3264 		break;
3265 
3266 	case MEM_GOING_OFFLINE:
3267 		pr_info("memory is going offline");
3268 		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3269 		if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3270 			goto out_unlock;
3271 		ehea_rereg_mrs();
3272 		break;
3273 
3274 	default:
3275 		break;
3276 	}
3277 
3278 	ehea_update_firmware_handles();
3279 	ret = NOTIFY_OK;
3280 
3281 out_unlock:
3282 	mutex_unlock(&dlpar_mem_lock);
3283 	return ret;
3284 }
3285 
3286 static struct notifier_block ehea_mem_nb = {
3287 	.notifier_call = ehea_mem_notifier,
3288 };
3289 
3290 static void ehea_crash_handler(void)
3291 {
3292 	int i;
3293 
3294 	if (ehea_fw_handles.arr)
3295 		for (i = 0; i < ehea_fw_handles.num_entries; i++)
3296 			ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3297 					     ehea_fw_handles.arr[i].fwh,
3298 					     FORCE_FREE);
3299 
3300 	if (ehea_bcmc_regs.arr)
3301 		for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3302 			ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3303 					      ehea_bcmc_regs.arr[i].port_id,
3304 					      ehea_bcmc_regs.arr[i].reg_type,
3305 					      ehea_bcmc_regs.arr[i].macaddr,
3306 					      0, H_DEREG_BCMC);
3307 }
3308 
3309 static atomic_t ehea_memory_hooks_registered;
3310 
3311 /* Register memory hooks on probe of first adapter */
3312 static int ehea_register_memory_hooks(void)
3313 {
3314 	int ret = 0;
3315 
3316 	if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3317 		return 0;
3318 
3319 	ret = ehea_create_busmap();
3320 	if (ret) {
3321 		pr_info("ehea_create_busmap failed\n");
3322 		goto out;
3323 	}
3324 
3325 	ret = register_reboot_notifier(&ehea_reboot_nb);
3326 	if (ret) {
3327 		pr_info("register_reboot_notifier failed\n");
3328 		goto out;
3329 	}
3330 
3331 	ret = register_memory_notifier(&ehea_mem_nb);
3332 	if (ret) {
3333 		pr_info("register_memory_notifier failed\n");
3334 		goto out2;
3335 	}
3336 
3337 	ret = crash_shutdown_register(ehea_crash_handler);
3338 	if (ret) {
3339 		pr_info("crash_shutdown_register failed\n");
3340 		goto out3;
3341 	}
3342 
3343 	return 0;
3344 
3345 out3:
3346 	unregister_memory_notifier(&ehea_mem_nb);
3347 out2:
3348 	unregister_reboot_notifier(&ehea_reboot_nb);
3349 out:
3350 	atomic_dec(&ehea_memory_hooks_registered);
3351 	return ret;
3352 }
3353 
3354 static void ehea_unregister_memory_hooks(void)
3355 {
3356 	/* Only remove the hooks if we've registered them */
3357 	if (atomic_read(&ehea_memory_hooks_registered) == 0)
3358 		return;
3359 
3360 	unregister_reboot_notifier(&ehea_reboot_nb);
3361 	if (crash_shutdown_unregister(ehea_crash_handler))
3362 		pr_info("failed unregistering crash handler\n");
3363 	unregister_memory_notifier(&ehea_mem_nb);
3364 }
3365 
3366 static int ehea_probe_adapter(struct platform_device *dev)
3367 {
3368 	struct ehea_adapter *adapter;
3369 	const u64 *adapter_handle;
3370 	int ret;
3371 	int i;
3372 
3373 	ret = ehea_register_memory_hooks();
3374 	if (ret)
3375 		return ret;
3376 
3377 	if (!dev || !dev->dev.of_node) {
3378 		pr_err("Invalid ibmebus device probed\n");
3379 		return -EINVAL;
3380 	}
3381 
3382 	adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3383 	if (!adapter) {
3384 		ret = -ENOMEM;
3385 		dev_err(&dev->dev, "no mem for ehea_adapter\n");
3386 		goto out;
3387 	}
3388 
3389 	list_add(&adapter->list, &adapter_list);
3390 
3391 	adapter->ofdev = dev;
3392 
3393 	adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3394 					 NULL);
3395 	if (adapter_handle)
3396 		adapter->handle = *adapter_handle;
3397 
3398 	if (!adapter->handle) {
3399 		dev_err(&dev->dev, "failed getting handle for adapter"
3400 			" '%pOF'\n", dev->dev.of_node);
3401 		ret = -ENODEV;
3402 		goto out_free_ad;
3403 	}
3404 
3405 	adapter->pd = EHEA_PD_ID;
3406 
3407 	platform_set_drvdata(dev, adapter);
3408 
3409 
3410 	/* initialize adapter and ports */
3411 	/* get adapter properties */
3412 	ret = ehea_sense_adapter_attr(adapter);
3413 	if (ret) {
3414 		dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3415 		goto out_free_ad;
3416 	}
3417 
3418 	adapter->neq = ehea_create_eq(adapter,
3419 				      EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3420 	if (!adapter->neq) {
3421 		ret = -EIO;
3422 		dev_err(&dev->dev, "NEQ creation failed\n");
3423 		goto out_free_ad;
3424 	}
3425 
3426 	tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet);
3427 
3428 	ret = ehea_create_device_sysfs(dev);
3429 	if (ret)
3430 		goto out_kill_eq;
3431 
3432 	ret = ehea_setup_ports(adapter);
3433 	if (ret) {
3434 		dev_err(&dev->dev, "setup_ports failed\n");
3435 		goto out_rem_dev_sysfs;
3436 	}
3437 
3438 	ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3439 				  ehea_interrupt_neq, 0,
3440 				  "ehea_neq", adapter);
3441 	if (ret) {
3442 		dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3443 		goto out_shutdown_ports;
3444 	}
3445 
3446 	/* Handle any events that might be pending. */
3447 	tasklet_hi_schedule(&adapter->neq_tasklet);
3448 
3449 	ret = 0;
3450 	goto out;
3451 
3452 out_shutdown_ports:
3453 	for (i = 0; i < EHEA_MAX_PORTS; i++)
3454 		if (adapter->port[i]) {
3455 			ehea_shutdown_single_port(adapter->port[i]);
3456 			adapter->port[i] = NULL;
3457 		}
3458 
3459 out_rem_dev_sysfs:
3460 	ehea_remove_device_sysfs(dev);
3461 
3462 out_kill_eq:
3463 	ehea_destroy_eq(adapter->neq);
3464 
3465 out_free_ad:
3466 	list_del(&adapter->list);
3467 
3468 out:
3469 	ehea_update_firmware_handles();
3470 
3471 	return ret;
3472 }
3473 
3474 static int ehea_remove(struct platform_device *dev)
3475 {
3476 	struct ehea_adapter *adapter = platform_get_drvdata(dev);
3477 	int i;
3478 
3479 	for (i = 0; i < EHEA_MAX_PORTS; i++)
3480 		if (adapter->port[i]) {
3481 			ehea_shutdown_single_port(adapter->port[i]);
3482 			adapter->port[i] = NULL;
3483 		}
3484 
3485 	ehea_remove_device_sysfs(dev);
3486 
3487 	ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3488 	tasklet_kill(&adapter->neq_tasklet);
3489 
3490 	ehea_destroy_eq(adapter->neq);
3491 	ehea_remove_adapter_mr(adapter);
3492 	list_del(&adapter->list);
3493 
3494 	ehea_update_firmware_handles();
3495 
3496 	return 0;
3497 }
3498 
3499 static int check_module_parm(void)
3500 {
3501 	int ret = 0;
3502 
3503 	if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3504 	    (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3505 		pr_info("Bad parameter: rq1_entries\n");
3506 		ret = -EINVAL;
3507 	}
3508 	if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3509 	    (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3510 		pr_info("Bad parameter: rq2_entries\n");
3511 		ret = -EINVAL;
3512 	}
3513 	if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3514 	    (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3515 		pr_info("Bad parameter: rq3_entries\n");
3516 		ret = -EINVAL;
3517 	}
3518 	if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3519 	    (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3520 		pr_info("Bad parameter: sq_entries\n");
3521 		ret = -EINVAL;
3522 	}
3523 
3524 	return ret;
3525 }
3526 
3527 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3528 {
3529 	return sprintf(buf, "%d", EHEA_CAPABILITIES);
3530 }
3531 
3532 static DRIVER_ATTR_RO(capabilities);
3533 
3534 static int __init ehea_module_init(void)
3535 {
3536 	int ret;
3537 
3538 	pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3539 
3540 	memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3541 	memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3542 
3543 	mutex_init(&ehea_fw_handles.lock);
3544 	spin_lock_init(&ehea_bcmc_regs.lock);
3545 
3546 	ret = check_module_parm();
3547 	if (ret)
3548 		goto out;
3549 
3550 	ret = ibmebus_register_driver(&ehea_driver);
3551 	if (ret) {
3552 		pr_err("failed registering eHEA device driver on ebus\n");
3553 		goto out;
3554 	}
3555 
3556 	ret = driver_create_file(&ehea_driver.driver,
3557 				 &driver_attr_capabilities);
3558 	if (ret) {
3559 		pr_err("failed to register capabilities attribute, ret=%d\n",
3560 		       ret);
3561 		goto out2;
3562 	}
3563 
3564 	return ret;
3565 
3566 out2:
3567 	ibmebus_unregister_driver(&ehea_driver);
3568 out:
3569 	return ret;
3570 }
3571 
3572 static void __exit ehea_module_exit(void)
3573 {
3574 	driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3575 	ibmebus_unregister_driver(&ehea_driver);
3576 	ehea_unregister_memory_hooks();
3577 	kfree(ehea_fw_handles.arr);
3578 	kfree(ehea_bcmc_regs.arr);
3579 	ehea_destroy_busmap();
3580 }
3581 
3582 module_init(ehea_module_init);
3583 module_exit(ehea_module_exit);
3584