net: ehea: avoid null pointer dereference
[pandora-kernel.git] / drivers / net / ethernet / ibm / ehea / ehea_main.c
1 /*
2  *  linux/drivers/net/ehea/ehea_main.c
3  *
4  *  eHEA ethernet device driver for IBM eServer System p
5  *
6  *  (C) Copyright IBM Corp. 2006
7  *
8  *  Authors:
9  *       Christoph Raisch <raisch@de.ibm.com>
10  *       Jan-Bernd Themann <themann@de.ibm.com>
11  *       Thomas Klein <tklein@de.ibm.com>
12  *
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License as published by
16  * the Free Software Foundation; either version 2, or (at your option)
17  * any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, write to the Free Software
26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27  */
28
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
31 #include <linux/in.h>
32 #include <linux/ip.h>
33 #include <linux/tcp.h>
34 #include <linux/udp.h>
35 #include <linux/if.h>
36 #include <linux/list.h>
37 #include <linux/slab.h>
38 #include <linux/if_ether.h>
39 #include <linux/notifier.h>
40 #include <linux/reboot.h>
41 #include <linux/memory.h>
42 #include <asm/kexec.h>
43 #include <linux/mutex.h>
44 #include <linux/prefetch.h>
45
46 #include <net/ip.h>
47
48 #include "ehea.h"
49 #include "ehea_qmr.h"
50 #include "ehea_phyp.h"
51
52
53 MODULE_LICENSE("GPL");
54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
56 MODULE_VERSION(DRV_VERSION);
57
58
59 static int msg_level = -1;
60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
64 static int use_mcs = 1;
65 static int prop_carrier_state;
66
67 module_param(msg_level, int, 0);
68 module_param(rq1_entries, int, 0);
69 module_param(rq2_entries, int, 0);
70 module_param(rq3_entries, int, 0);
71 module_param(sq_entries, int, 0);
72 module_param(prop_carrier_state, int, 0);
73 module_param(use_mcs, int, 0);
74
75 MODULE_PARM_DESC(msg_level, "msg_level");
76 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
77                  "port to stack. 1:yes, 0:no.  Default = 0 ");
78 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
79                  "[2^x - 1], x = [6..14]. Default = "
80                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
81 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
82                  "[2^x - 1], x = [6..14]. Default = "
83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
84 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
85                  "[2^x - 1], x = [6..14]. Default = "
86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
87 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
88                  "[2^x - 1], x = [6..14]. Default = "
89                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
90 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
91                  "Default = 1");
92
93 static int port_name_cnt;
94 static LIST_HEAD(adapter_list);
95 static unsigned long ehea_driver_flags;
96 static DEFINE_MUTEX(dlpar_mem_lock);
97 struct ehea_fw_handle_array ehea_fw_handles;
98 struct ehea_bcmc_reg_array ehea_bcmc_regs;
99
100
101 static int __devinit ehea_probe_adapter(struct platform_device *dev,
102                                         const struct of_device_id *id);
103
104 static int __devexit ehea_remove(struct platform_device *dev);
105
106 static struct of_device_id ehea_device_table[] = {
107         {
108                 .name = "lhea",
109                 .compatible = "IBM,lhea",
110         },
111         {},
112 };
113 MODULE_DEVICE_TABLE(of, ehea_device_table);
114
115 static struct of_platform_driver ehea_driver = {
116         .driver = {
117                 .name = "ehea",
118                 .owner = THIS_MODULE,
119                 .of_match_table = ehea_device_table,
120         },
121         .probe = ehea_probe_adapter,
122         .remove = ehea_remove,
123 };
124
125 void ehea_dump(void *adr, int len, char *msg)
126 {
127         int x;
128         unsigned char *deb = adr;
129         for (x = 0; x < len; x += 16) {
130                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
131                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
132                 deb += 16;
133         }
134 }
135
136 void ehea_schedule_port_reset(struct ehea_port *port)
137 {
138         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
139                 schedule_work(&port->reset_task);
140 }
141
142 static void ehea_update_firmware_handles(void)
143 {
144         struct ehea_fw_handle_entry *arr = NULL;
145         struct ehea_adapter *adapter;
146         int num_adapters = 0;
147         int num_ports = 0;
148         int num_portres = 0;
149         int i = 0;
150         int num_fw_handles, k, l;
151
152         /* Determine number of handles */
153         mutex_lock(&ehea_fw_handles.lock);
154
155         list_for_each_entry(adapter, &adapter_list, list) {
156                 num_adapters++;
157
158                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
159                         struct ehea_port *port = adapter->port[k];
160
161                         if (!port || (port->state != EHEA_PORT_UP))
162                                 continue;
163
164                         num_ports++;
165                         num_portres += port->num_def_qps;
166                 }
167         }
168
169         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
170                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
171                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
172
173         if (num_fw_handles) {
174                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
175                 if (!arr)
176                         goto out;  /* Keep the existing array */
177         } else
178                 goto out_update;
179
180         list_for_each_entry(adapter, &adapter_list, list) {
181                 if (num_adapters == 0)
182                         break;
183
184                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
185                         struct ehea_port *port = adapter->port[k];
186
187                         if (!port || (port->state != EHEA_PORT_UP) ||
188                             (num_ports == 0))
189                                 continue;
190
191                         for (l = 0; l < port->num_def_qps; l++) {
192                                 struct ehea_port_res *pr = &port->port_res[l];
193
194                                 arr[i].adh = adapter->handle;
195                                 arr[i++].fwh = pr->qp->fw_handle;
196                                 arr[i].adh = adapter->handle;
197                                 arr[i++].fwh = pr->send_cq->fw_handle;
198                                 arr[i].adh = adapter->handle;
199                                 arr[i++].fwh = pr->recv_cq->fw_handle;
200                                 arr[i].adh = adapter->handle;
201                                 arr[i++].fwh = pr->eq->fw_handle;
202                                 arr[i].adh = adapter->handle;
203                                 arr[i++].fwh = pr->send_mr.handle;
204                                 arr[i].adh = adapter->handle;
205                                 arr[i++].fwh = pr->recv_mr.handle;
206                         }
207                         arr[i].adh = adapter->handle;
208                         arr[i++].fwh = port->qp_eq->fw_handle;
209                         num_ports--;
210                 }
211
212                 arr[i].adh = adapter->handle;
213                 arr[i++].fwh = adapter->neq->fw_handle;
214
215                 if (adapter->mr.handle) {
216                         arr[i].adh = adapter->handle;
217                         arr[i++].fwh = adapter->mr.handle;
218                 }
219                 num_adapters--;
220         }
221
222 out_update:
223         kfree(ehea_fw_handles.arr);
224         ehea_fw_handles.arr = arr;
225         ehea_fw_handles.num_entries = i;
226 out:
227         mutex_unlock(&ehea_fw_handles.lock);
228 }
229
230 static void ehea_update_bcmc_registrations(void)
231 {
232         unsigned long flags;
233         struct ehea_bcmc_reg_entry *arr = NULL;
234         struct ehea_adapter *adapter;
235         struct ehea_mc_list *mc_entry;
236         int num_registrations = 0;
237         int i = 0;
238         int k;
239
240         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
241
242         /* Determine number of registrations */
243         list_for_each_entry(adapter, &adapter_list, list)
244                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
245                         struct ehea_port *port = adapter->port[k];
246
247                         if (!port || (port->state != EHEA_PORT_UP))
248                                 continue;
249
250                         num_registrations += 2; /* Broadcast registrations */
251
252                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
253                                 num_registrations += 2;
254                 }
255
256         if (num_registrations) {
257                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
258                 if (!arr)
259                         goto out;  /* Keep the existing array */
260         } else
261                 goto out_update;
262
263         list_for_each_entry(adapter, &adapter_list, list) {
264                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
265                         struct ehea_port *port = adapter->port[k];
266
267                         if (!port || (port->state != EHEA_PORT_UP))
268                                 continue;
269
270                         if (num_registrations == 0)
271                                 goto out_update;
272
273                         arr[i].adh = adapter->handle;
274                         arr[i].port_id = port->logical_port_id;
275                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
276                                           EHEA_BCMC_UNTAGGED;
277                         arr[i++].macaddr = port->mac_addr;
278
279                         arr[i].adh = adapter->handle;
280                         arr[i].port_id = port->logical_port_id;
281                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
282                                           EHEA_BCMC_VLANID_ALL;
283                         arr[i++].macaddr = port->mac_addr;
284                         num_registrations -= 2;
285
286                         list_for_each_entry(mc_entry,
287                                             &port->mc_list->list, list) {
288                                 if (num_registrations == 0)
289                                         goto out_update;
290
291                                 arr[i].adh = adapter->handle;
292                                 arr[i].port_id = port->logical_port_id;
293                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
294                                                   EHEA_BCMC_MULTICAST |
295                                                   EHEA_BCMC_UNTAGGED;
296                                 arr[i++].macaddr = mc_entry->macaddr;
297
298                                 arr[i].adh = adapter->handle;
299                                 arr[i].port_id = port->logical_port_id;
300                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
301                                                   EHEA_BCMC_MULTICAST |
302                                                   EHEA_BCMC_VLANID_ALL;
303                                 arr[i++].macaddr = mc_entry->macaddr;
304                                 num_registrations -= 2;
305                         }
306                 }
307         }
308
309 out_update:
310         kfree(ehea_bcmc_regs.arr);
311         ehea_bcmc_regs.arr = arr;
312         ehea_bcmc_regs.num_entries = i;
313 out:
314         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
315 }
316
317 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
318                                         struct rtnl_link_stats64 *stats)
319 {
320         struct ehea_port *port = netdev_priv(dev);
321         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
322         int i;
323
324         for (i = 0; i < port->num_def_qps; i++) {
325                 rx_packets += port->port_res[i].rx_packets;
326                 rx_bytes   += port->port_res[i].rx_bytes;
327         }
328
329         for (i = 0; i < port->num_def_qps; i++) {
330                 tx_packets += port->port_res[i].tx_packets;
331                 tx_bytes   += port->port_res[i].tx_bytes;
332         }
333
334         stats->tx_packets = tx_packets;
335         stats->rx_bytes = rx_bytes;
336         stats->tx_bytes = tx_bytes;
337         stats->rx_packets = rx_packets;
338
339         return &port->stats;
340 }
341
342 static void ehea_update_stats(struct work_struct *work)
343 {
344         struct ehea_port *port =
345                 container_of(work, struct ehea_port, stats_work.work);
346         struct net_device *dev = port->netdev;
347         struct rtnl_link_stats64 *stats = &port->stats;
348         struct hcp_ehea_port_cb2 *cb2;
349         u64 hret;
350
351         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
352         if (!cb2) {
353                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
354                 goto resched;
355         }
356
357         hret = ehea_h_query_ehea_port(port->adapter->handle,
358                                       port->logical_port_id,
359                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
360         if (hret != H_SUCCESS) {
361                 netdev_err(dev, "query_ehea_port failed\n");
362                 goto out_herr;
363         }
364
365         if (netif_msg_hw(port))
366                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
367
368         stats->multicast = cb2->rxmcp;
369         stats->rx_errors = cb2->rxuerr;
370
371 out_herr:
372         free_page((unsigned long)cb2);
373 resched:
374         schedule_delayed_work(&port->stats_work,
375                               round_jiffies_relative(msecs_to_jiffies(1000)));
376 }
377
378 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
379 {
380         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
381         struct net_device *dev = pr->port->netdev;
382         int max_index_mask = pr->rq1_skba.len - 1;
383         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
384         int adder = 0;
385         int i;
386
387         pr->rq1_skba.os_skbs = 0;
388
389         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
390                 if (nr_of_wqes > 0)
391                         pr->rq1_skba.index = index;
392                 pr->rq1_skba.os_skbs = fill_wqes;
393                 return;
394         }
395
396         for (i = 0; i < fill_wqes; i++) {
397                 if (!skb_arr_rq1[index]) {
398                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
399                                                               EHEA_L_PKT_SIZE);
400                         if (!skb_arr_rq1[index]) {
401                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
402                                 pr->rq1_skba.os_skbs = fill_wqes - i;
403                                 break;
404                         }
405                 }
406                 index--;
407                 index &= max_index_mask;
408                 adder++;
409         }
410
411         if (adder == 0)
412                 return;
413
414         /* Ring doorbell */
415         ehea_update_rq1a(pr->qp, adder);
416 }
417
418 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
419 {
420         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
421         struct net_device *dev = pr->port->netdev;
422         int i;
423
424         if (nr_rq1a > pr->rq1_skba.len) {
425                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
426                 return;
427         }
428
429         for (i = 0; i < nr_rq1a; i++) {
430                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
431                 if (!skb_arr_rq1[i]) {
432                         netdev_info(dev, "Not enough memory to allocate skb array\n");
433                         break;
434                 }
435         }
436         /* Ring doorbell */
437         ehea_update_rq1a(pr->qp, i - 1);
438 }
439
440 static int ehea_refill_rq_def(struct ehea_port_res *pr,
441                               struct ehea_q_skb_arr *q_skba, int rq_nr,
442                               int num_wqes, int wqe_type, int packet_size)
443 {
444         struct net_device *dev = pr->port->netdev;
445         struct ehea_qp *qp = pr->qp;
446         struct sk_buff **skb_arr = q_skba->arr;
447         struct ehea_rwqe *rwqe;
448         int i, index, max_index_mask, fill_wqes;
449         int adder = 0;
450         int ret = 0;
451
452         fill_wqes = q_skba->os_skbs + num_wqes;
453         q_skba->os_skbs = 0;
454
455         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
456                 q_skba->os_skbs = fill_wqes;
457                 return ret;
458         }
459
460         index = q_skba->index;
461         max_index_mask = q_skba->len - 1;
462         for (i = 0; i < fill_wqes; i++) {
463                 u64 tmp_addr;
464                 struct sk_buff *skb;
465
466                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
467                 if (!skb) {
468                         q_skba->os_skbs = fill_wqes - i;
469                         if (q_skba->os_skbs == q_skba->len - 2) {
470                                 netdev_info(pr->port->netdev,
471                                             "rq%i ran dry - no mem for skb\n",
472                                             rq_nr);
473                                 ret = -ENOMEM;
474                         }
475                         break;
476                 }
477
478                 skb_arr[index] = skb;
479                 tmp_addr = ehea_map_vaddr(skb->data);
480                 if (tmp_addr == -1) {
481                         dev_kfree_skb(skb);
482                         q_skba->os_skbs = fill_wqes - i;
483                         ret = 0;
484                         break;
485                 }
486
487                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
488                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
489                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
490                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
491                 rwqe->sg_list[0].vaddr = tmp_addr;
492                 rwqe->sg_list[0].len = packet_size;
493                 rwqe->data_segments = 1;
494
495                 index++;
496                 index &= max_index_mask;
497                 adder++;
498         }
499
500         q_skba->index = index;
501         if (adder == 0)
502                 goto out;
503
504         /* Ring doorbell */
505         iosync();
506         if (rq_nr == 2)
507                 ehea_update_rq2a(pr->qp, adder);
508         else
509                 ehea_update_rq3a(pr->qp, adder);
510 out:
511         return ret;
512 }
513
514
515 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
516 {
517         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
518                                   nr_of_wqes, EHEA_RWQE2_TYPE,
519                                   EHEA_RQ2_PKT_SIZE);
520 }
521
522
523 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
524 {
525         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
526                                   nr_of_wqes, EHEA_RWQE3_TYPE,
527                                   EHEA_MAX_PACKET_SIZE);
528 }
529
530 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
531 {
532         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
533         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
534                 return 0;
535         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
536             (cqe->header_length == 0))
537                 return 0;
538         return -EINVAL;
539 }
540
541 static inline void ehea_fill_skb(struct net_device *dev,
542                                  struct sk_buff *skb, struct ehea_cqe *cqe,
543                                  struct ehea_port_res *pr)
544 {
545         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
546
547         skb_put(skb, length);
548         skb->protocol = eth_type_trans(skb, dev);
549
550         /* The packet was not an IPV4 packet so a complemented checksum was
551            calculated. The value is found in the Internet Checksum field. */
552         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
553                 skb->ip_summed = CHECKSUM_COMPLETE;
554                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
555         } else
556                 skb->ip_summed = CHECKSUM_UNNECESSARY;
557
558         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
559 }
560
561 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
562                                                int arr_len,
563                                                struct ehea_cqe *cqe)
564 {
565         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
566         struct sk_buff *skb;
567         void *pref;
568         int x;
569
570         x = skb_index + 1;
571         x &= (arr_len - 1);
572
573         pref = skb_array[x];
574         if (pref) {
575                 prefetchw(pref);
576                 prefetchw(pref + EHEA_CACHE_LINE);
577
578                 pref = (skb_array[x]->data);
579                 prefetch(pref);
580                 prefetch(pref + EHEA_CACHE_LINE);
581                 prefetch(pref + EHEA_CACHE_LINE * 2);
582                 prefetch(pref + EHEA_CACHE_LINE * 3);
583         }
584
585         skb = skb_array[skb_index];
586         skb_array[skb_index] = NULL;
587         return skb;
588 }
589
590 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
591                                                   int arr_len, int wqe_index)
592 {
593         struct sk_buff *skb;
594         void *pref;
595         int x;
596
597         x = wqe_index + 1;
598         x &= (arr_len - 1);
599
600         pref = skb_array[x];
601         if (pref) {
602                 prefetchw(pref);
603                 prefetchw(pref + EHEA_CACHE_LINE);
604
605                 pref = (skb_array[x]->data);
606                 prefetchw(pref);
607                 prefetchw(pref + EHEA_CACHE_LINE);
608         }
609
610         skb = skb_array[wqe_index];
611         skb_array[wqe_index] = NULL;
612         return skb;
613 }
614
615 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
616                                  struct ehea_cqe *cqe, int *processed_rq2,
617                                  int *processed_rq3)
618 {
619         struct sk_buff *skb;
620
621         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
622                 pr->p_stats.err_tcp_cksum++;
623         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
624                 pr->p_stats.err_ip_cksum++;
625         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
626                 pr->p_stats.err_frame_crc++;
627
628         if (rq == 2) {
629                 *processed_rq2 += 1;
630                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
631                 dev_kfree_skb(skb);
632         } else if (rq == 3) {
633                 *processed_rq3 += 1;
634                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
635                 dev_kfree_skb(skb);
636         }
637
638         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
639                 if (netif_msg_rx_err(pr->port)) {
640                         pr_err("Critical receive error for QP %d. Resetting port.\n",
641                                pr->qp->init_attr.qp_nr);
642                         ehea_dump(cqe, sizeof(*cqe), "CQE");
643                 }
644                 ehea_schedule_port_reset(pr->port);
645                 return 1;
646         }
647
648         return 0;
649 }
650
651 static int ehea_proc_rwqes(struct net_device *dev,
652                            struct ehea_port_res *pr,
653                            int budget)
654 {
655         struct ehea_port *port = pr->port;
656         struct ehea_qp *qp = pr->qp;
657         struct ehea_cqe *cqe;
658         struct sk_buff *skb;
659         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
660         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
661         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
662         int skb_arr_rq1_len = pr->rq1_skba.len;
663         int skb_arr_rq2_len = pr->rq2_skba.len;
664         int skb_arr_rq3_len = pr->rq3_skba.len;
665         int processed, processed_rq1, processed_rq2, processed_rq3;
666         u64 processed_bytes = 0;
667         int wqe_index, last_wqe_index, rq, port_reset;
668
669         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
670         last_wqe_index = 0;
671
672         cqe = ehea_poll_rq1(qp, &wqe_index);
673         while ((processed < budget) && cqe) {
674                 ehea_inc_rq1(qp);
675                 processed_rq1++;
676                 processed++;
677                 if (netif_msg_rx_status(port))
678                         ehea_dump(cqe, sizeof(*cqe), "CQE");
679
680                 last_wqe_index = wqe_index;
681                 rmb();
682                 if (!ehea_check_cqe(cqe, &rq)) {
683                         if (rq == 1) {
684                                 /* LL RQ1 */
685                                 skb = get_skb_by_index_ll(skb_arr_rq1,
686                                                           skb_arr_rq1_len,
687                                                           wqe_index);
688                                 if (unlikely(!skb)) {
689                                         netif_info(port, rx_err, dev,
690                                                   "LL rq1: skb=NULL\n");
691
692                                         skb = netdev_alloc_skb(dev,
693                                                                EHEA_L_PKT_SIZE);
694                                         if (!skb) {
695                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
696                                                 break;
697                                         }
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, cqe->vlan_tag);
730
731                         napi_gro_receive(&pr->napi, skb);
732                 } else {
733                         pr->p_stats.poll_receive_errors++;
734                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
735                                                            &processed_rq2,
736                                                            &processed_rq3);
737                         if (port_reset)
738                                 break;
739                 }
740                 cqe = ehea_poll_rq1(qp, &wqe_index);
741         }
742
743         pr->rx_packets += processed;
744         pr->rx_bytes += processed_bytes;
745
746         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
747         ehea_refill_rq2(pr, processed_rq2);
748         ehea_refill_rq3(pr, processed_rq3);
749
750         return processed;
751 }
752
753 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
754
755 static void reset_sq_restart_flag(struct ehea_port *port)
756 {
757         int i;
758
759         for (i = 0; i < port->num_def_qps; i++) {
760                 struct ehea_port_res *pr = &port->port_res[i];
761                 pr->sq_restart_flag = 0;
762         }
763         wake_up(&port->restart_wq);
764 }
765
766 static void check_sqs(struct ehea_port *port)
767 {
768         struct ehea_swqe *swqe;
769         int swqe_index;
770         int i, k;
771
772         for (i = 0; i < port->num_def_qps; i++) {
773                 struct ehea_port_res *pr = &port->port_res[i];
774                 int ret;
775                 k = 0;
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_kfree_skb(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 #ifdef CONFIG_NET_POLL_CONTROLLER
914 static void ehea_netpoll(struct net_device *dev)
915 {
916         struct ehea_port *port = netdev_priv(dev);
917         int i;
918
919         for (i = 0; i < port->num_def_qps; i++)
920                 napi_schedule(&port->port_res[i].napi);
921 }
922 #endif
923
924 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
925 {
926         struct ehea_port_res *pr = param;
927
928         napi_schedule(&pr->napi);
929
930         return IRQ_HANDLED;
931 }
932
933 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
934 {
935         struct ehea_port *port = param;
936         struct ehea_eqe *eqe;
937         struct ehea_qp *qp;
938         u32 qp_token;
939         u64 resource_type, aer, aerr;
940         int reset_port = 0;
941
942         eqe = ehea_poll_eq(port->qp_eq);
943
944         while (eqe) {
945                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
946                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
947                        eqe->entry, qp_token);
948
949                 qp = port->port_res[qp_token].qp;
950
951                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
952                                                 &aer, &aerr);
953
954                 if (resource_type == EHEA_AER_RESTYPE_QP) {
955                         if ((aer & EHEA_AER_RESET_MASK) ||
956                             (aerr & EHEA_AERR_RESET_MASK))
957                                  reset_port = 1;
958                 } else
959                         reset_port = 1;   /* Reset in case of CQ or EQ error */
960
961                 eqe = ehea_poll_eq(port->qp_eq);
962         }
963
964         if (reset_port) {
965                 pr_err("Resetting port\n");
966                 ehea_schedule_port_reset(port);
967         }
968
969         return IRQ_HANDLED;
970 }
971
972 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
973                                        int logical_port)
974 {
975         int i;
976
977         for (i = 0; i < EHEA_MAX_PORTS; i++)
978                 if (adapter->port[i])
979                         if (adapter->port[i]->logical_port_id == logical_port)
980                                 return adapter->port[i];
981         return NULL;
982 }
983
984 int ehea_sense_port_attr(struct ehea_port *port)
985 {
986         int ret;
987         u64 hret;
988         struct hcp_ehea_port_cb0 *cb0;
989
990         /* may be called via ehea_neq_tasklet() */
991         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
992         if (!cb0) {
993                 pr_err("no mem for cb0\n");
994                 ret = -ENOMEM;
995                 goto out;
996         }
997
998         hret = ehea_h_query_ehea_port(port->adapter->handle,
999                                       port->logical_port_id, H_PORT_CB0,
1000                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1001                                       cb0);
1002         if (hret != H_SUCCESS) {
1003                 ret = -EIO;
1004                 goto out_free;
1005         }
1006
1007         /* MAC address */
1008         port->mac_addr = cb0->port_mac_addr << 16;
1009
1010         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1011                 ret = -EADDRNOTAVAIL;
1012                 goto out_free;
1013         }
1014
1015         /* Port speed */
1016         switch (cb0->port_speed) {
1017         case H_SPEED_10M_H:
1018                 port->port_speed = EHEA_SPEED_10M;
1019                 port->full_duplex = 0;
1020                 break;
1021         case H_SPEED_10M_F:
1022                 port->port_speed = EHEA_SPEED_10M;
1023                 port->full_duplex = 1;
1024                 break;
1025         case H_SPEED_100M_H:
1026                 port->port_speed = EHEA_SPEED_100M;
1027                 port->full_duplex = 0;
1028                 break;
1029         case H_SPEED_100M_F:
1030                 port->port_speed = EHEA_SPEED_100M;
1031                 port->full_duplex = 1;
1032                 break;
1033         case H_SPEED_1G_F:
1034                 port->port_speed = EHEA_SPEED_1G;
1035                 port->full_duplex = 1;
1036                 break;
1037         case H_SPEED_10G_F:
1038                 port->port_speed = EHEA_SPEED_10G;
1039                 port->full_duplex = 1;
1040                 break;
1041         default:
1042                 port->port_speed = 0;
1043                 port->full_duplex = 0;
1044                 break;
1045         }
1046
1047         port->autoneg = 1;
1048         port->num_mcs = cb0->num_default_qps;
1049
1050         /* Number of default QPs */
1051         if (use_mcs)
1052                 port->num_def_qps = cb0->num_default_qps;
1053         else
1054                 port->num_def_qps = 1;
1055
1056         if (!port->num_def_qps) {
1057                 ret = -EINVAL;
1058                 goto out_free;
1059         }
1060
1061         ret = 0;
1062 out_free:
1063         if (ret || netif_msg_probe(port))
1064                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1065         free_page((unsigned long)cb0);
1066 out:
1067         return ret;
1068 }
1069
1070 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1071 {
1072         struct hcp_ehea_port_cb4 *cb4;
1073         u64 hret;
1074         int ret = 0;
1075
1076         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1077         if (!cb4) {
1078                 pr_err("no mem for cb4\n");
1079                 ret = -ENOMEM;
1080                 goto out;
1081         }
1082
1083         cb4->port_speed = port_speed;
1084
1085         netif_carrier_off(port->netdev);
1086
1087         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1088                                        port->logical_port_id,
1089                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1090         if (hret == H_SUCCESS) {
1091                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1092
1093                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1094                                               port->logical_port_id,
1095                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1096                                               cb4);
1097                 if (hret == H_SUCCESS) {
1098                         switch (cb4->port_speed) {
1099                         case H_SPEED_10M_H:
1100                                 port->port_speed = EHEA_SPEED_10M;
1101                                 port->full_duplex = 0;
1102                                 break;
1103                         case H_SPEED_10M_F:
1104                                 port->port_speed = EHEA_SPEED_10M;
1105                                 port->full_duplex = 1;
1106                                 break;
1107                         case H_SPEED_100M_H:
1108                                 port->port_speed = EHEA_SPEED_100M;
1109                                 port->full_duplex = 0;
1110                                 break;
1111                         case H_SPEED_100M_F:
1112                                 port->port_speed = EHEA_SPEED_100M;
1113                                 port->full_duplex = 1;
1114                                 break;
1115                         case H_SPEED_1G_F:
1116                                 port->port_speed = EHEA_SPEED_1G;
1117                                 port->full_duplex = 1;
1118                                 break;
1119                         case H_SPEED_10G_F:
1120                                 port->port_speed = EHEA_SPEED_10G;
1121                                 port->full_duplex = 1;
1122                                 break;
1123                         default:
1124                                 port->port_speed = 0;
1125                                 port->full_duplex = 0;
1126                                 break;
1127                         }
1128                 } else {
1129                         pr_err("Failed sensing port speed\n");
1130                         ret = -EIO;
1131                 }
1132         } else {
1133                 if (hret == H_AUTHORITY) {
1134                         pr_info("Hypervisor denied setting port speed\n");
1135                         ret = -EPERM;
1136                 } else {
1137                         ret = -EIO;
1138                         pr_err("Failed setting port speed\n");
1139                 }
1140         }
1141         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1142                 netif_carrier_on(port->netdev);
1143
1144         free_page((unsigned long)cb4);
1145 out:
1146         return ret;
1147 }
1148
1149 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1150 {
1151         int ret;
1152         u8 ec;
1153         u8 portnum;
1154         struct ehea_port *port;
1155         struct net_device *dev;
1156
1157         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1158         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1159         port = ehea_get_port(adapter, portnum);
1160         if (!port) {
1161                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1162                 return;
1163         }
1164         dev = port->netdev;
1165
1166         switch (ec) {
1167         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1168
1169                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1170                         if (!netif_carrier_ok(dev)) {
1171                                 ret = ehea_sense_port_attr(port);
1172                                 if (ret) {
1173                                         netdev_err(dev, "failed resensing port attributes\n");
1174                                         break;
1175                                 }
1176
1177                                 netif_info(port, link, dev,
1178                                            "Logical port up: %dMbps %s Duplex\n",
1179                                            port->port_speed,
1180                                            port->full_duplex == 1 ?
1181                                            "Full" : "Half");
1182
1183                                 netif_carrier_on(dev);
1184                                 netif_wake_queue(dev);
1185                         }
1186                 } else
1187                         if (netif_carrier_ok(dev)) {
1188                                 netif_info(port, link, dev,
1189                                            "Logical port down\n");
1190                                 netif_carrier_off(dev);
1191                                 netif_tx_disable(dev);
1192                         }
1193
1194                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1195                         port->phy_link = EHEA_PHY_LINK_UP;
1196                         netif_info(port, link, dev,
1197                                    "Physical port up\n");
1198                         if (prop_carrier_state)
1199                                 netif_carrier_on(dev);
1200                 } else {
1201                         port->phy_link = EHEA_PHY_LINK_DOWN;
1202                         netif_info(port, link, dev,
1203                                    "Physical port down\n");
1204                         if (prop_carrier_state)
1205                                 netif_carrier_off(dev);
1206                 }
1207
1208                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1209                         netdev_info(dev,
1210                                     "External switch port is primary port\n");
1211                 else
1212                         netdev_info(dev,
1213                                     "External switch port is backup port\n");
1214
1215                 break;
1216         case EHEA_EC_ADAPTER_MALFUNC:
1217                 netdev_err(dev, "Adapter malfunction\n");
1218                 break;
1219         case EHEA_EC_PORT_MALFUNC:
1220                 netdev_info(dev, "Port malfunction\n");
1221                 netif_carrier_off(dev);
1222                 netif_tx_disable(dev);
1223                 break;
1224         default:
1225                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1226                 break;
1227         }
1228 }
1229
1230 static void ehea_neq_tasklet(unsigned long data)
1231 {
1232         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1233         struct ehea_eqe *eqe;
1234         u64 event_mask;
1235
1236         eqe = ehea_poll_eq(adapter->neq);
1237         pr_debug("eqe=%p\n", eqe);
1238
1239         while (eqe) {
1240                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1241                 ehea_parse_eqe(adapter, eqe->entry);
1242                 eqe = ehea_poll_eq(adapter->neq);
1243                 pr_debug("next eqe=%p\n", eqe);
1244         }
1245
1246         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1247                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1248                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1249
1250         ehea_h_reset_events(adapter->handle,
1251                             adapter->neq->fw_handle, event_mask);
1252 }
1253
1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1255 {
1256         struct ehea_adapter *adapter = param;
1257         tasklet_hi_schedule(&adapter->neq_tasklet);
1258         return IRQ_HANDLED;
1259 }
1260
1261
1262 static int ehea_fill_port_res(struct ehea_port_res *pr)
1263 {
1264         int ret;
1265         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1266
1267         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1268
1269         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1270
1271         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1272
1273         return ret;
1274 }
1275
1276 static int ehea_reg_interrupts(struct net_device *dev)
1277 {
1278         struct ehea_port *port = netdev_priv(dev);
1279         struct ehea_port_res *pr;
1280         int i, ret;
1281
1282
1283         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1284                  dev->name);
1285
1286         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1287                                   ehea_qp_aff_irq_handler,
1288                                   IRQF_DISABLED, port->int_aff_name, port);
1289         if (ret) {
1290                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1291                            port->qp_eq->attr.ist1);
1292                 goto out_free_qpeq;
1293         }
1294
1295         netif_info(port, ifup, dev,
1296                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1297                    port->qp_eq->attr.ist1);
1298
1299
1300         for (i = 0; i < port->num_def_qps; i++) {
1301                 pr = &port->port_res[i];
1302                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1303                          "%s-queue%d", dev->name, i);
1304                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1305                                           ehea_recv_irq_handler,
1306                                           IRQF_DISABLED, pr->int_send_name,
1307                                           pr);
1308                 if (ret) {
1309                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1310                                    i, pr->eq->attr.ist1);
1311                         goto out_free_req;
1312                 }
1313                 netif_info(port, ifup, dev,
1314                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1315                            pr->eq->attr.ist1, i);
1316         }
1317 out:
1318         return ret;
1319
1320
1321 out_free_req:
1322         while (--i >= 0) {
1323                 u32 ist = port->port_res[i].eq->attr.ist1;
1324                 ibmebus_free_irq(ist, &port->port_res[i]);
1325         }
1326
1327 out_free_qpeq:
1328         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1329         i = port->num_def_qps;
1330
1331         goto out;
1332
1333 }
1334
1335 static void ehea_free_interrupts(struct net_device *dev)
1336 {
1337         struct ehea_port *port = netdev_priv(dev);
1338         struct ehea_port_res *pr;
1339         int i;
1340
1341         /* send */
1342
1343         for (i = 0; i < port->num_def_qps; i++) {
1344                 pr = &port->port_res[i];
1345                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1346                 netif_info(port, intr, dev,
1347                            "free send irq for res %d with handle 0x%X\n",
1348                            i, pr->eq->attr.ist1);
1349         }
1350
1351         /* associated events */
1352         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1353         netif_info(port, intr, dev,
1354                    "associated event interrupt for handle 0x%X freed\n",
1355                    port->qp_eq->attr.ist1);
1356 }
1357
1358 static int ehea_configure_port(struct ehea_port *port)
1359 {
1360         int ret, i;
1361         u64 hret, mask;
1362         struct hcp_ehea_port_cb0 *cb0;
1363
1364         ret = -ENOMEM;
1365         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1366         if (!cb0)
1367                 goto out;
1368
1369         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1370                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1371                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1372                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1373                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1374                                       PXLY_RC_VLAN_FILTER)
1375                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1376
1377         for (i = 0; i < port->num_mcs; i++)
1378                 if (use_mcs)
1379                         cb0->default_qpn_arr[i] =
1380                                 port->port_res[i].qp->init_attr.qp_nr;
1381                 else
1382                         cb0->default_qpn_arr[i] =
1383                                 port->port_res[0].qp->init_attr.qp_nr;
1384
1385         if (netif_msg_ifup(port))
1386                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1387
1388         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1389              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1390
1391         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1392                                        port->logical_port_id,
1393                                        H_PORT_CB0, mask, cb0);
1394         ret = -EIO;
1395         if (hret != H_SUCCESS)
1396                 goto out_free;
1397
1398         ret = 0;
1399
1400 out_free:
1401         free_page((unsigned long)cb0);
1402 out:
1403         return ret;
1404 }
1405
1406 int ehea_gen_smrs(struct ehea_port_res *pr)
1407 {
1408         int ret;
1409         struct ehea_adapter *adapter = pr->port->adapter;
1410
1411         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1412         if (ret)
1413                 goto out;
1414
1415         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1416         if (ret)
1417                 goto out_free;
1418
1419         return 0;
1420
1421 out_free:
1422         ehea_rem_mr(&pr->send_mr);
1423 out:
1424         pr_err("Generating SMRS failed\n");
1425         return -EIO;
1426 }
1427
1428 int ehea_rem_smrs(struct ehea_port_res *pr)
1429 {
1430         if ((ehea_rem_mr(&pr->send_mr)) ||
1431             (ehea_rem_mr(&pr->recv_mr)))
1432                 return -EIO;
1433         else
1434                 return 0;
1435 }
1436
1437 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1438 {
1439         int arr_size = sizeof(void *) * max_q_entries;
1440
1441         q_skba->arr = vzalloc(arr_size);
1442         if (!q_skba->arr)
1443                 return -ENOMEM;
1444
1445         q_skba->len = max_q_entries;
1446         q_skba->index = 0;
1447         q_skba->os_skbs = 0;
1448
1449         return 0;
1450 }
1451
1452 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1453                               struct port_res_cfg *pr_cfg, int queue_token)
1454 {
1455         struct ehea_adapter *adapter = port->adapter;
1456         enum ehea_eq_type eq_type = EHEA_EQ;
1457         struct ehea_qp_init_attr *init_attr = NULL;
1458         int ret = -EIO;
1459         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1460
1461         tx_bytes = pr->tx_bytes;
1462         tx_packets = pr->tx_packets;
1463         rx_bytes = pr->rx_bytes;
1464         rx_packets = pr->rx_packets;
1465
1466         memset(pr, 0, sizeof(struct ehea_port_res));
1467
1468         pr->tx_bytes = rx_bytes;
1469         pr->tx_packets = tx_packets;
1470         pr->rx_bytes = rx_bytes;
1471         pr->rx_packets = rx_packets;
1472
1473         pr->port = port;
1474
1475         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1476         if (!pr->eq) {
1477                 pr_err("create_eq failed (eq)\n");
1478                 goto out_free;
1479         }
1480
1481         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1482                                      pr->eq->fw_handle,
1483                                      port->logical_port_id);
1484         if (!pr->recv_cq) {
1485                 pr_err("create_cq failed (cq_recv)\n");
1486                 goto out_free;
1487         }
1488
1489         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1490                                      pr->eq->fw_handle,
1491                                      port->logical_port_id);
1492         if (!pr->send_cq) {
1493                 pr_err("create_cq failed (cq_send)\n");
1494                 goto out_free;
1495         }
1496
1497         if (netif_msg_ifup(port))
1498                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1499                         pr->send_cq->attr.act_nr_of_cqes,
1500                         pr->recv_cq->attr.act_nr_of_cqes);
1501
1502         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1503         if (!init_attr) {
1504                 ret = -ENOMEM;
1505                 pr_err("no mem for ehea_qp_init_attr\n");
1506                 goto out_free;
1507         }
1508
1509         init_attr->low_lat_rq1 = 1;
1510         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1511         init_attr->rq_count = 3;
1512         init_attr->qp_token = queue_token;
1513         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1514         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1515         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1516         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1517         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1518         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1519         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1520         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1521         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1522         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1523         init_attr->port_nr = port->logical_port_id;
1524         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1525         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1526         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1527
1528         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1529         if (!pr->qp) {
1530                 pr_err("create_qp failed\n");
1531                 ret = -EIO;
1532                 goto out_free;
1533         }
1534
1535         if (netif_msg_ifup(port))
1536                 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",
1537                         init_attr->qp_nr,
1538                         init_attr->act_nr_send_wqes,
1539                         init_attr->act_nr_rwqes_rq1,
1540                         init_attr->act_nr_rwqes_rq2,
1541                         init_attr->act_nr_rwqes_rq3);
1542
1543         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1544
1545         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1546         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1547         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1548         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1549         if (ret)
1550                 goto out_free;
1551
1552         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1553         if (ehea_gen_smrs(pr) != 0) {
1554                 ret = -EIO;
1555                 goto out_free;
1556         }
1557
1558         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1559
1560         kfree(init_attr);
1561
1562         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1563
1564         ret = 0;
1565         goto out;
1566
1567 out_free:
1568         kfree(init_attr);
1569         vfree(pr->sq_skba.arr);
1570         vfree(pr->rq1_skba.arr);
1571         vfree(pr->rq2_skba.arr);
1572         vfree(pr->rq3_skba.arr);
1573         ehea_destroy_qp(pr->qp);
1574         ehea_destroy_cq(pr->send_cq);
1575         ehea_destroy_cq(pr->recv_cq);
1576         ehea_destroy_eq(pr->eq);
1577 out:
1578         return ret;
1579 }
1580
1581 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1582 {
1583         int ret, i;
1584
1585         if (pr->qp)
1586                 netif_napi_del(&pr->napi);
1587
1588         ret = ehea_destroy_qp(pr->qp);
1589
1590         if (!ret) {
1591                 ehea_destroy_cq(pr->send_cq);
1592                 ehea_destroy_cq(pr->recv_cq);
1593                 ehea_destroy_eq(pr->eq);
1594
1595                 for (i = 0; i < pr->rq1_skba.len; i++)
1596                         if (pr->rq1_skba.arr[i])
1597                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1598
1599                 for (i = 0; i < pr->rq2_skba.len; i++)
1600                         if (pr->rq2_skba.arr[i])
1601                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1602
1603                 for (i = 0; i < pr->rq3_skba.len; i++)
1604                         if (pr->rq3_skba.arr[i])
1605                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1606
1607                 for (i = 0; i < pr->sq_skba.len; i++)
1608                         if (pr->sq_skba.arr[i])
1609                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1610
1611                 vfree(pr->rq1_skba.arr);
1612                 vfree(pr->rq2_skba.arr);
1613                 vfree(pr->rq3_skba.arr);
1614                 vfree(pr->sq_skba.arr);
1615                 ret = ehea_rem_smrs(pr);
1616         }
1617         return ret;
1618 }
1619
1620 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1621                                   u32 lkey)
1622 {
1623         int skb_data_size = skb_headlen(skb);
1624         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1625         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1626         unsigned int immediate_len = SWQE2_MAX_IMM;
1627
1628         swqe->descriptors = 0;
1629
1630         if (skb_is_gso(skb)) {
1631                 swqe->tx_control |= EHEA_SWQE_TSO;
1632                 swqe->mss = skb_shinfo(skb)->gso_size;
1633                 /*
1634                  * For TSO packets we only copy the headers into the
1635                  * immediate area.
1636                  */
1637                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1638         }
1639
1640         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1641                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1642                 swqe->immediate_data_length = immediate_len;
1643
1644                 if (skb_data_size > immediate_len) {
1645                         sg1entry->l_key = lkey;
1646                         sg1entry->len = skb_data_size - immediate_len;
1647                         sg1entry->vaddr =
1648                                 ehea_map_vaddr(skb->data + immediate_len);
1649                         swqe->descriptors++;
1650                 }
1651         } else {
1652                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1653                 swqe->immediate_data_length = skb_data_size;
1654         }
1655 }
1656
1657 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1658                                     struct ehea_swqe *swqe, u32 lkey)
1659 {
1660         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1661         skb_frag_t *frag;
1662         int nfrags, sg1entry_contains_frag_data, i;
1663
1664         nfrags = skb_shinfo(skb)->nr_frags;
1665         sg1entry = &swqe->u.immdata_desc.sg_entry;
1666         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1667         sg1entry_contains_frag_data = 0;
1668
1669         write_swqe2_immediate(skb, swqe, lkey);
1670
1671         /* write descriptors */
1672         if (nfrags > 0) {
1673                 if (swqe->descriptors == 0) {
1674                         /* sg1entry not yet used */
1675                         frag = &skb_shinfo(skb)->frags[0];
1676
1677                         /* copy sg1entry data */
1678                         sg1entry->l_key = lkey;
1679                         sg1entry->len = skb_frag_size(frag);
1680                         sg1entry->vaddr =
1681                                 ehea_map_vaddr(skb_frag_address(frag));
1682                         swqe->descriptors++;
1683                         sg1entry_contains_frag_data = 1;
1684                 }
1685
1686                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1687
1688                         frag = &skb_shinfo(skb)->frags[i];
1689                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1690
1691                         sgentry->l_key = lkey;
1692                         sgentry->len = skb_frag_size(frag);
1693                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1694                         swqe->descriptors++;
1695                 }
1696         }
1697 }
1698
1699 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1700 {
1701         int ret = 0;
1702         u64 hret;
1703         u8 reg_type;
1704
1705         /* De/Register untagged packets */
1706         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1707         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1708                                      port->logical_port_id,
1709                                      reg_type, port->mac_addr, 0, hcallid);
1710         if (hret != H_SUCCESS) {
1711                 pr_err("%sregistering bc address failed (tagged)\n",
1712                        hcallid == H_REG_BCMC ? "" : "de");
1713                 ret = -EIO;
1714                 goto out_herr;
1715         }
1716
1717         /* De/Register VLAN packets */
1718         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1719         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1720                                      port->logical_port_id,
1721                                      reg_type, port->mac_addr, 0, hcallid);
1722         if (hret != H_SUCCESS) {
1723                 pr_err("%sregistering bc address failed (vlan)\n",
1724                        hcallid == H_REG_BCMC ? "" : "de");
1725                 ret = -EIO;
1726         }
1727 out_herr:
1728         return ret;
1729 }
1730
1731 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1732 {
1733         struct ehea_port *port = netdev_priv(dev);
1734         struct sockaddr *mac_addr = sa;
1735         struct hcp_ehea_port_cb0 *cb0;
1736         int ret;
1737         u64 hret;
1738
1739         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1740                 ret = -EADDRNOTAVAIL;
1741                 goto out;
1742         }
1743
1744         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1745         if (!cb0) {
1746                 pr_err("no mem for cb0\n");
1747                 ret = -ENOMEM;
1748                 goto out;
1749         }
1750
1751         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1752
1753         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1754
1755         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1756                                        port->logical_port_id, H_PORT_CB0,
1757                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1758         if (hret != H_SUCCESS) {
1759                 ret = -EIO;
1760                 goto out_free;
1761         }
1762
1763         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1764
1765         /* Deregister old MAC in pHYP */
1766         if (port->state == EHEA_PORT_UP) {
1767                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1768                 if (ret)
1769                         goto out_upregs;
1770         }
1771
1772         port->mac_addr = cb0->port_mac_addr << 16;
1773
1774         /* Register new MAC in pHYP */
1775         if (port->state == EHEA_PORT_UP) {
1776                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1777                 if (ret)
1778                         goto out_upregs;
1779         }
1780
1781         ret = 0;
1782
1783 out_upregs:
1784         ehea_update_bcmc_registrations();
1785 out_free:
1786         free_page((unsigned long)cb0);
1787 out:
1788         return ret;
1789 }
1790
1791 static void ehea_promiscuous_error(u64 hret, int enable)
1792 {
1793         if (hret == H_AUTHORITY)
1794                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1795                         enable == 1 ? "en" : "dis");
1796         else
1797                 pr_err("failed %sabling promiscuous mode\n",
1798                        enable == 1 ? "en" : "dis");
1799 }
1800
1801 static void ehea_promiscuous(struct net_device *dev, int enable)
1802 {
1803         struct ehea_port *port = netdev_priv(dev);
1804         struct hcp_ehea_port_cb7 *cb7;
1805         u64 hret;
1806
1807         if (enable == port->promisc)
1808                 return;
1809
1810         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1811         if (!cb7) {
1812                 pr_err("no mem for cb7\n");
1813                 goto out;
1814         }
1815
1816         /* Modify Pxs_DUCQPN in CB7 */
1817         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1818
1819         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1820                                        port->logical_port_id,
1821                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1822         if (hret) {
1823                 ehea_promiscuous_error(hret, enable);
1824                 goto out;
1825         }
1826
1827         port->promisc = enable;
1828 out:
1829         free_page((unsigned long)cb7);
1830 }
1831
1832 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1833                                      u32 hcallid)
1834 {
1835         u64 hret;
1836         u8 reg_type;
1837
1838         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1839                  | EHEA_BCMC_UNTAGGED;
1840
1841         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1842                                      port->logical_port_id,
1843                                      reg_type, mc_mac_addr, 0, hcallid);
1844         if (hret)
1845                 goto out;
1846
1847         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1848                  | EHEA_BCMC_VLANID_ALL;
1849
1850         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1851                                      port->logical_port_id,
1852                                      reg_type, mc_mac_addr, 0, hcallid);
1853 out:
1854         return hret;
1855 }
1856
1857 static int ehea_drop_multicast_list(struct net_device *dev)
1858 {
1859         struct ehea_port *port = netdev_priv(dev);
1860         struct ehea_mc_list *mc_entry = port->mc_list;
1861         struct list_head *pos;
1862         struct list_head *temp;
1863         int ret = 0;
1864         u64 hret;
1865
1866         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1867                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1868
1869                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1870                                                  H_DEREG_BCMC);
1871                 if (hret) {
1872                         pr_err("failed deregistering mcast MAC\n");
1873                         ret = -EIO;
1874                 }
1875
1876                 list_del(pos);
1877                 kfree(mc_entry);
1878         }
1879         return ret;
1880 }
1881
1882 static void ehea_allmulti(struct net_device *dev, int enable)
1883 {
1884         struct ehea_port *port = netdev_priv(dev);
1885         u64 hret;
1886
1887         if (!port->allmulti) {
1888                 if (enable) {
1889                         /* Enable ALLMULTI */
1890                         ehea_drop_multicast_list(dev);
1891                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1892                         if (!hret)
1893                                 port->allmulti = 1;
1894                         else
1895                                 netdev_err(dev,
1896                                            "failed enabling IFF_ALLMULTI\n");
1897                 }
1898         } else
1899                 if (!enable) {
1900                         /* Disable ALLMULTI */
1901                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1902                         if (!hret)
1903                                 port->allmulti = 0;
1904                         else
1905                                 netdev_err(dev,
1906                                            "failed disabling IFF_ALLMULTI\n");
1907                 }
1908 }
1909
1910 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1911 {
1912         struct ehea_mc_list *ehea_mcl_entry;
1913         u64 hret;
1914
1915         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1916         if (!ehea_mcl_entry) {
1917                 pr_err("no mem for mcl_entry\n");
1918                 return;
1919         }
1920
1921         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1922
1923         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1924
1925         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1926                                          H_REG_BCMC);
1927         if (!hret)
1928                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1929         else {
1930                 pr_err("failed registering mcast MAC\n");
1931                 kfree(ehea_mcl_entry);
1932         }
1933 }
1934
1935 static void ehea_set_multicast_list(struct net_device *dev)
1936 {
1937         struct ehea_port *port = netdev_priv(dev);
1938         struct netdev_hw_addr *ha;
1939         int ret;
1940
1941         if (port->promisc) {
1942                 ehea_promiscuous(dev, 1);
1943                 return;
1944         }
1945         ehea_promiscuous(dev, 0);
1946
1947         if (dev->flags & IFF_ALLMULTI) {
1948                 ehea_allmulti(dev, 1);
1949                 goto out;
1950         }
1951         ehea_allmulti(dev, 0);
1952
1953         if (!netdev_mc_empty(dev)) {
1954                 ret = ehea_drop_multicast_list(dev);
1955                 if (ret) {
1956                         /* Dropping the current multicast list failed.
1957                          * Enabling ALL_MULTI is the best we can do.
1958                          */
1959                         ehea_allmulti(dev, 1);
1960                 }
1961
1962                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1963                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1964                                 port->adapter->max_mc_mac);
1965                         goto out;
1966                 }
1967
1968                 netdev_for_each_mc_addr(ha, dev)
1969                         ehea_add_multicast_entry(port, ha->addr);
1970
1971         }
1972 out:
1973         ehea_update_bcmc_registrations();
1974 }
1975
1976 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1977 {
1978         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1979                 return -EINVAL;
1980         dev->mtu = new_mtu;
1981         return 0;
1982 }
1983
1984 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1985 {
1986         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1987
1988         if (skb->protocol != htons(ETH_P_IP))
1989                 return;
1990
1991         if (skb->ip_summed == CHECKSUM_PARTIAL)
1992                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1993
1994         swqe->ip_start = skb_network_offset(skb);
1995         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1996
1997         switch (ip_hdr(skb)->protocol) {
1998         case IPPROTO_UDP:
1999                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2000                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2001
2002                 swqe->tcp_offset = swqe->ip_end + 1 +
2003                                    offsetof(struct udphdr, check);
2004                 break;
2005
2006         case IPPROTO_TCP:
2007                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2008                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2009
2010                 swqe->tcp_offset = swqe->ip_end + 1 +
2011                                    offsetof(struct tcphdr, check);
2012                 break;
2013         }
2014 }
2015
2016 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2017                        struct ehea_swqe *swqe, u32 lkey)
2018 {
2019         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2020
2021         xmit_common(skb, swqe);
2022
2023         write_swqe2_data(skb, dev, swqe, lkey);
2024 }
2025
2026 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2027                        struct ehea_swqe *swqe)
2028 {
2029         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2030
2031         xmit_common(skb, swqe);
2032
2033         if (!skb->data_len)
2034                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2035         else
2036                 skb_copy_bits(skb, 0, imm_data, skb->len);
2037
2038         swqe->immediate_data_length = skb->len;
2039         dev_kfree_skb(skb);
2040 }
2041
2042 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2043 {
2044         struct ehea_port *port = netdev_priv(dev);
2045         struct ehea_swqe *swqe;
2046         u32 lkey;
2047         int swqe_index;
2048         struct ehea_port_res *pr;
2049         struct netdev_queue *txq;
2050
2051         pr = &port->port_res[skb_get_queue_mapping(skb)];
2052         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2053
2054         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2055         memset(swqe, 0, SWQE_HEADER_SIZE);
2056         atomic_dec(&pr->swqe_avail);
2057
2058         if (vlan_tx_tag_present(skb)) {
2059                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2060                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2061         }
2062
2063         pr->tx_packets++;
2064         pr->tx_bytes += skb->len;
2065
2066         if (skb->len <= SWQE3_MAX_IMM) {
2067                 u32 sig_iv = port->sig_comp_iv;
2068                 u32 swqe_num = pr->swqe_id_counter;
2069                 ehea_xmit3(skb, dev, swqe);
2070                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2071                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2072                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2073                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2074                                                       sig_iv);
2075                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2076                         pr->swqe_ll_count = 0;
2077                 } else
2078                         pr->swqe_ll_count += 1;
2079         } else {
2080                 swqe->wr_id =
2081                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2082                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2083                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2084                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2085                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2086
2087                 pr->sq_skba.index++;
2088                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2089
2090                 lkey = pr->send_mr.lkey;
2091                 ehea_xmit2(skb, dev, swqe, lkey);
2092                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2093         }
2094         pr->swqe_id_counter += 1;
2095
2096         netif_info(port, tx_queued, dev,
2097                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2098         if (netif_msg_tx_queued(port))
2099                 ehea_dump(swqe, 512, "swqe");
2100
2101         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2102                 netif_tx_stop_queue(txq);
2103                 swqe->tx_control |= EHEA_SWQE_PURGE;
2104         }
2105
2106         ehea_post_swqe(pr->qp, swqe);
2107
2108         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2109                 pr->p_stats.queue_stopped++;
2110                 netif_tx_stop_queue(txq);
2111         }
2112
2113         return NETDEV_TX_OK;
2114 }
2115
2116 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2117 {
2118         struct ehea_port *port = netdev_priv(dev);
2119         struct ehea_adapter *adapter = port->adapter;
2120         struct hcp_ehea_port_cb1 *cb1;
2121         int index;
2122         u64 hret;
2123
2124         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2125         if (!cb1) {
2126                 pr_err("no mem for cb1\n");
2127                 goto out;
2128         }
2129
2130         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2131                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2132         if (hret != H_SUCCESS) {
2133                 pr_err("query_ehea_port failed\n");
2134                 goto out;
2135         }
2136
2137         index = (vid / 64);
2138         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2139
2140         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2141                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2142         if (hret != H_SUCCESS)
2143                 pr_err("modify_ehea_port failed\n");
2144 out:
2145         free_page((unsigned long)cb1);
2146         return;
2147 }
2148
2149 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2150 {
2151         struct ehea_port *port = netdev_priv(dev);
2152         struct ehea_adapter *adapter = port->adapter;
2153         struct hcp_ehea_port_cb1 *cb1;
2154         int index;
2155         u64 hret;
2156
2157         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2158         if (!cb1) {
2159                 pr_err("no mem for cb1\n");
2160                 goto out;
2161         }
2162
2163         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2164                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2165         if (hret != H_SUCCESS) {
2166                 pr_err("query_ehea_port failed\n");
2167                 goto out;
2168         }
2169
2170         index = (vid / 64);
2171         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2172
2173         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2174                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2175         if (hret != H_SUCCESS)
2176                 pr_err("modify_ehea_port failed\n");
2177 out:
2178         free_page((unsigned long)cb1);
2179 }
2180
2181 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2182 {
2183         int ret = -EIO;
2184         u64 hret;
2185         u16 dummy16 = 0;
2186         u64 dummy64 = 0;
2187         struct hcp_modify_qp_cb0 *cb0;
2188
2189         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2190         if (!cb0) {
2191                 ret = -ENOMEM;
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 (1)\n");
2199                 goto out;
2200         }
2201
2202         cb0->qp_ctl_reg = 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 (1)\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 (2)\n");
2215                 goto out;
2216         }
2217
2218         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
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 (2)\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 (3)\n");
2231                 goto out;
2232         }
2233
2234         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2235         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2236                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2237                                      &dummy64, &dummy64, &dummy16, &dummy16);
2238         if (hret != H_SUCCESS) {
2239                 pr_err("modify_ehea_qp failed (3)\n");
2240                 goto out;
2241         }
2242
2243         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2244                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2245         if (hret != H_SUCCESS) {
2246                 pr_err("query_ehea_qp failed (4)\n");
2247                 goto out;
2248         }
2249
2250         ret = 0;
2251 out:
2252         free_page((unsigned long)cb0);
2253         return ret;
2254 }
2255
2256 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2257 {
2258         int ret, i;
2259         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2260         enum ehea_eq_type eq_type = EHEA_EQ;
2261
2262         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2263                                    EHEA_MAX_ENTRIES_EQ, 1);
2264         if (!port->qp_eq) {
2265                 ret = -EINVAL;
2266                 pr_err("ehea_create_eq failed (qp_eq)\n");
2267                 goto out_kill_eq;
2268         }
2269
2270         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2271         pr_cfg.max_entries_scq = sq_entries * 2;
2272         pr_cfg.max_entries_sq = sq_entries;
2273         pr_cfg.max_entries_rq1 = rq1_entries;
2274         pr_cfg.max_entries_rq2 = rq2_entries;
2275         pr_cfg.max_entries_rq3 = rq3_entries;
2276
2277         pr_cfg_small_rx.max_entries_rcq = 1;
2278         pr_cfg_small_rx.max_entries_scq = sq_entries;
2279         pr_cfg_small_rx.max_entries_sq = sq_entries;
2280         pr_cfg_small_rx.max_entries_rq1 = 1;
2281         pr_cfg_small_rx.max_entries_rq2 = 1;
2282         pr_cfg_small_rx.max_entries_rq3 = 1;
2283
2284         for (i = 0; i < def_qps; i++) {
2285                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2286                 if (ret)
2287                         goto out_clean_pr;
2288         }
2289         for (i = def_qps; i < def_qps; i++) {
2290                 ret = ehea_init_port_res(port, &port->port_res[i],
2291                                          &pr_cfg_small_rx, i);
2292                 if (ret)
2293                         goto out_clean_pr;
2294         }
2295
2296         return 0;
2297
2298 out_clean_pr:
2299         while (--i >= 0)
2300                 ehea_clean_portres(port, &port->port_res[i]);
2301
2302 out_kill_eq:
2303         ehea_destroy_eq(port->qp_eq);
2304         return ret;
2305 }
2306
2307 static int ehea_clean_all_portres(struct ehea_port *port)
2308 {
2309         int ret = 0;
2310         int i;
2311
2312         for (i = 0; i < port->num_def_qps; i++)
2313                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2314
2315         ret |= ehea_destroy_eq(port->qp_eq);
2316
2317         return ret;
2318 }
2319
2320 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2321 {
2322         if (adapter->active_ports)
2323                 return;
2324
2325         ehea_rem_mr(&adapter->mr);
2326 }
2327
2328 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2329 {
2330         if (adapter->active_ports)
2331                 return 0;
2332
2333         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2334 }
2335
2336 static int ehea_up(struct net_device *dev)
2337 {
2338         int ret, i;
2339         struct ehea_port *port = netdev_priv(dev);
2340
2341         if (port->state == EHEA_PORT_UP)
2342                 return 0;
2343
2344         ret = ehea_port_res_setup(port, port->num_def_qps);
2345         if (ret) {
2346                 netdev_err(dev, "port_res_failed\n");
2347                 goto out;
2348         }
2349
2350         /* Set default QP for this port */
2351         ret = ehea_configure_port(port);
2352         if (ret) {
2353                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2354                 goto out_clean_pr;
2355         }
2356
2357         ret = ehea_reg_interrupts(dev);
2358         if (ret) {
2359                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2360                 goto out_clean_pr;
2361         }
2362
2363         for (i = 0; i < port->num_def_qps; i++) {
2364                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2365                 if (ret) {
2366                         netdev_err(dev, "activate_qp failed\n");
2367                         goto out_free_irqs;
2368                 }
2369         }
2370
2371         for (i = 0; i < port->num_def_qps; i++) {
2372                 ret = ehea_fill_port_res(&port->port_res[i]);
2373                 if (ret) {
2374                         netdev_err(dev, "out_free_irqs\n");
2375                         goto out_free_irqs;
2376                 }
2377         }
2378
2379         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2380         if (ret) {
2381                 ret = -EIO;
2382                 goto out_free_irqs;
2383         }
2384
2385         port->state = EHEA_PORT_UP;
2386
2387         ret = 0;
2388         goto out;
2389
2390 out_free_irqs:
2391         ehea_free_interrupts(dev);
2392
2393 out_clean_pr:
2394         ehea_clean_all_portres(port);
2395 out:
2396         if (ret)
2397                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2398
2399         ehea_update_bcmc_registrations();
2400         ehea_update_firmware_handles();
2401
2402         return ret;
2403 }
2404
2405 static void port_napi_disable(struct ehea_port *port)
2406 {
2407         int i;
2408
2409         for (i = 0; i < port->num_def_qps; i++)
2410                 napi_disable(&port->port_res[i].napi);
2411 }
2412
2413 static void port_napi_enable(struct ehea_port *port)
2414 {
2415         int i;
2416
2417         for (i = 0; i < port->num_def_qps; i++)
2418                 napi_enable(&port->port_res[i].napi);
2419 }
2420
2421 static int ehea_open(struct net_device *dev)
2422 {
2423         int ret;
2424         struct ehea_port *port = netdev_priv(dev);
2425
2426         mutex_lock(&port->port_lock);
2427
2428         netif_info(port, ifup, dev, "enabling port\n");
2429
2430         ret = ehea_up(dev);
2431         if (!ret) {
2432                 port_napi_enable(port);
2433                 netif_tx_start_all_queues(dev);
2434         }
2435
2436         mutex_unlock(&port->port_lock);
2437         schedule_delayed_work(&port->stats_work,
2438                               round_jiffies_relative(msecs_to_jiffies(1000)));
2439
2440         return ret;
2441 }
2442
2443 static int ehea_down(struct net_device *dev)
2444 {
2445         int ret;
2446         struct ehea_port *port = netdev_priv(dev);
2447
2448         if (port->state == EHEA_PORT_DOWN)
2449                 return 0;
2450
2451         ehea_drop_multicast_list(dev);
2452         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2453
2454         ehea_free_interrupts(dev);
2455
2456         port->state = EHEA_PORT_DOWN;
2457
2458         ehea_update_bcmc_registrations();
2459
2460         ret = ehea_clean_all_portres(port);
2461         if (ret)
2462                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2463
2464         ehea_update_firmware_handles();
2465
2466         return ret;
2467 }
2468
2469 static int ehea_stop(struct net_device *dev)
2470 {
2471         int ret;
2472         struct ehea_port *port = netdev_priv(dev);
2473
2474         netif_info(port, ifdown, dev, "disabling port\n");
2475
2476         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2477         cancel_work_sync(&port->reset_task);
2478         cancel_delayed_work_sync(&port->stats_work);
2479         mutex_lock(&port->port_lock);
2480         netif_tx_stop_all_queues(dev);
2481         port_napi_disable(port);
2482         ret = ehea_down(dev);
2483         mutex_unlock(&port->port_lock);
2484         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2485         return ret;
2486 }
2487
2488 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2489 {
2490         struct ehea_qp qp = *orig_qp;
2491         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2492         struct ehea_swqe *swqe;
2493         int wqe_index;
2494         int i;
2495
2496         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2497                 swqe = ehea_get_swqe(&qp, &wqe_index);
2498                 swqe->tx_control |= EHEA_SWQE_PURGE;
2499         }
2500 }
2501
2502 static void ehea_flush_sq(struct ehea_port *port)
2503 {
2504         int i;
2505
2506         for (i = 0; i < port->num_def_qps; i++) {
2507                 struct ehea_port_res *pr = &port->port_res[i];
2508                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2509                 int ret;
2510
2511                 ret = wait_event_timeout(port->swqe_avail_wq,
2512                          atomic_read(&pr->swqe_avail) >= swqe_max,
2513                          msecs_to_jiffies(100));
2514
2515                 if (!ret) {
2516                         pr_err("WARNING: sq not flushed completely\n");
2517                         break;
2518                 }
2519         }
2520 }
2521
2522 int ehea_stop_qps(struct net_device *dev)
2523 {
2524         struct ehea_port *port = netdev_priv(dev);
2525         struct ehea_adapter *adapter = port->adapter;
2526         struct hcp_modify_qp_cb0 *cb0;
2527         int ret = -EIO;
2528         int dret;
2529         int i;
2530         u64 hret;
2531         u64 dummy64 = 0;
2532         u16 dummy16 = 0;
2533
2534         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2535         if (!cb0) {
2536                 ret = -ENOMEM;
2537                 goto out;
2538         }
2539
2540         for (i = 0; i < (port->num_def_qps); i++) {
2541                 struct ehea_port_res *pr =  &port->port_res[i];
2542                 struct ehea_qp *qp = pr->qp;
2543
2544                 /* Purge send queue */
2545                 ehea_purge_sq(qp);
2546
2547                 /* Disable queue pair */
2548                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2549                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2550                                             cb0);
2551                 if (hret != H_SUCCESS) {
2552                         pr_err("query_ehea_qp failed (1)\n");
2553                         goto out;
2554                 }
2555
2556                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2557                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2558
2559                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2560                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2561                                                             1), cb0, &dummy64,
2562                                              &dummy64, &dummy16, &dummy16);
2563                 if (hret != H_SUCCESS) {
2564                         pr_err("modify_ehea_qp failed (1)\n");
2565                         goto out;
2566                 }
2567
2568                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2569                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2570                                             cb0);
2571                 if (hret != H_SUCCESS) {
2572                         pr_err("query_ehea_qp failed (2)\n");
2573                         goto out;
2574                 }
2575
2576                 /* deregister shared memory regions */
2577                 dret = ehea_rem_smrs(pr);
2578                 if (dret) {
2579                         pr_err("unreg shared memory region failed\n");
2580                         goto out;
2581                 }
2582         }
2583
2584         ret = 0;
2585 out:
2586         free_page((unsigned long)cb0);
2587
2588         return ret;
2589 }
2590
2591 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2592 {
2593         struct ehea_qp qp = *orig_qp;
2594         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2595         struct ehea_rwqe *rwqe;
2596         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2597         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2598         struct sk_buff *skb;
2599         u32 lkey = pr->recv_mr.lkey;
2600
2601
2602         int i;
2603         int index;
2604
2605         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2606                 rwqe = ehea_get_next_rwqe(&qp, 2);
2607                 rwqe->sg_list[0].l_key = lkey;
2608                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2609                 skb = skba_rq2[index];
2610                 if (skb)
2611                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2612         }
2613
2614         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2615                 rwqe = ehea_get_next_rwqe(&qp, 3);
2616                 rwqe->sg_list[0].l_key = lkey;
2617                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2618                 skb = skba_rq3[index];
2619                 if (skb)
2620                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2621         }
2622 }
2623
2624 int ehea_restart_qps(struct net_device *dev)
2625 {
2626         struct ehea_port *port = netdev_priv(dev);
2627         struct ehea_adapter *adapter = port->adapter;
2628         int ret = 0;
2629         int i;
2630
2631         struct hcp_modify_qp_cb0 *cb0;
2632         u64 hret;
2633         u64 dummy64 = 0;
2634         u16 dummy16 = 0;
2635
2636         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2637         if (!cb0) {
2638                 ret = -ENOMEM;
2639                 goto out;
2640         }
2641
2642         for (i = 0; i < (port->num_def_qps); i++) {
2643                 struct ehea_port_res *pr =  &port->port_res[i];
2644                 struct ehea_qp *qp = pr->qp;
2645
2646                 ret = ehea_gen_smrs(pr);
2647                 if (ret) {
2648                         netdev_err(dev, "creation of shared memory regions failed\n");
2649                         goto out;
2650                 }
2651
2652                 ehea_update_rqs(qp, pr);
2653
2654                 /* Enable queue pair */
2655                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2656                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2657                                             cb0);
2658                 if (hret != H_SUCCESS) {
2659                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2660                         goto out;
2661                 }
2662
2663                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2664                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2665
2666                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2667                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2668                                                             1), cb0, &dummy64,
2669                                              &dummy64, &dummy16, &dummy16);
2670                 if (hret != H_SUCCESS) {
2671                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2672                         goto out;
2673                 }
2674
2675                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2676                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2677                                             cb0);
2678                 if (hret != H_SUCCESS) {
2679                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2680                         goto out;
2681                 }
2682
2683                 /* refill entire queue */
2684                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2685                 ehea_refill_rq2(pr, 0);
2686                 ehea_refill_rq3(pr, 0);
2687         }
2688 out:
2689         free_page((unsigned long)cb0);
2690
2691         return ret;
2692 }
2693
2694 static void ehea_reset_port(struct work_struct *work)
2695 {
2696         int ret;
2697         struct ehea_port *port =
2698                 container_of(work, struct ehea_port, reset_task);
2699         struct net_device *dev = port->netdev;
2700
2701         mutex_lock(&dlpar_mem_lock);
2702         port->resets++;
2703         mutex_lock(&port->port_lock);
2704         netif_tx_disable(dev);
2705
2706         port_napi_disable(port);
2707
2708         ehea_down(dev);
2709
2710         ret = ehea_up(dev);
2711         if (ret)
2712                 goto out;
2713
2714         ehea_set_multicast_list(dev);
2715
2716         netif_info(port, timer, dev, "reset successful\n");
2717
2718         port_napi_enable(port);
2719
2720         netif_tx_wake_all_queues(dev);
2721 out:
2722         mutex_unlock(&port->port_lock);
2723         mutex_unlock(&dlpar_mem_lock);
2724 }
2725
2726 static void ehea_rereg_mrs(void)
2727 {
2728         int ret, i;
2729         struct ehea_adapter *adapter;
2730
2731         pr_info("LPAR memory changed - re-initializing driver\n");
2732
2733         list_for_each_entry(adapter, &adapter_list, list)
2734                 if (adapter->active_ports) {
2735                         /* Shutdown all ports */
2736                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2737                                 struct ehea_port *port = adapter->port[i];
2738                                 struct net_device *dev;
2739
2740                                 if (!port)
2741                                         continue;
2742
2743                                 dev = port->netdev;
2744
2745                                 if (dev->flags & IFF_UP) {
2746                                         mutex_lock(&port->port_lock);
2747                                         netif_tx_disable(dev);
2748                                         ehea_flush_sq(port);
2749                                         ret = ehea_stop_qps(dev);
2750                                         if (ret) {
2751                                                 mutex_unlock(&port->port_lock);
2752                                                 goto out;
2753                                         }
2754                                         port_napi_disable(port);
2755                                         mutex_unlock(&port->port_lock);
2756                                 }
2757                                 reset_sq_restart_flag(port);
2758                         }
2759
2760                         /* Unregister old memory region */
2761                         ret = ehea_rem_mr(&adapter->mr);
2762                         if (ret) {
2763                                 pr_err("unregister MR failed - driver inoperable!\n");
2764                                 goto out;
2765                         }
2766                 }
2767
2768         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2769
2770         list_for_each_entry(adapter, &adapter_list, list)
2771                 if (adapter->active_ports) {
2772                         /* Register new memory region */
2773                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2774                         if (ret) {
2775                                 pr_err("register MR failed - driver inoperable!\n");
2776                                 goto out;
2777                         }
2778
2779                         /* Restart all ports */
2780                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2781                                 struct ehea_port *port = adapter->port[i];
2782
2783                                 if (port) {
2784                                         struct net_device *dev = port->netdev;
2785
2786                                         if (dev->flags & IFF_UP) {
2787                                                 mutex_lock(&port->port_lock);
2788                                                 ret = ehea_restart_qps(dev);
2789                                                 if (!ret) {
2790                                                         check_sqs(port);
2791                                                         port_napi_enable(port);
2792                                                         netif_tx_wake_all_queues(dev);
2793                                                 } else {
2794                                                         netdev_err(dev, "Unable to restart QPS\n");
2795                                                 }
2796                                                 mutex_unlock(&port->port_lock);
2797                                         }
2798                                 }
2799                         }
2800                 }
2801         pr_info("re-initializing driver complete\n");
2802 out:
2803         return;
2804 }
2805
2806 static void ehea_tx_watchdog(struct net_device *dev)
2807 {
2808         struct ehea_port *port = netdev_priv(dev);
2809
2810         if (netif_carrier_ok(dev) &&
2811             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2812                 ehea_schedule_port_reset(port);
2813 }
2814
2815 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2816 {
2817         struct hcp_query_ehea *cb;
2818         u64 hret;
2819         int ret;
2820
2821         cb = (void *)get_zeroed_page(GFP_KERNEL);
2822         if (!cb) {
2823                 ret = -ENOMEM;
2824                 goto out;
2825         }
2826
2827         hret = ehea_h_query_ehea(adapter->handle, cb);
2828
2829         if (hret != H_SUCCESS) {
2830                 ret = -EIO;
2831                 goto out_herr;
2832         }
2833
2834         adapter->max_mc_mac = cb->max_mc_mac - 1;
2835         ret = 0;
2836
2837 out_herr:
2838         free_page((unsigned long)cb);
2839 out:
2840         return ret;
2841 }
2842
2843 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2844 {
2845         struct hcp_ehea_port_cb4 *cb4;
2846         u64 hret;
2847         int ret = 0;
2848
2849         *jumbo = 0;
2850
2851         /* (Try to) enable *jumbo frames */
2852         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2853         if (!cb4) {
2854                 pr_err("no mem for cb4\n");
2855                 ret = -ENOMEM;
2856                 goto out;
2857         } else {
2858                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2859                                               port->logical_port_id,
2860                                               H_PORT_CB4,
2861                                               H_PORT_CB4_JUMBO, cb4);
2862                 if (hret == H_SUCCESS) {
2863                         if (cb4->jumbo_frame)
2864                                 *jumbo = 1;
2865                         else {
2866                                 cb4->jumbo_frame = 1;
2867                                 hret = ehea_h_modify_ehea_port(port->adapter->
2868                                                                handle,
2869                                                                port->
2870                                                                logical_port_id,
2871                                                                H_PORT_CB4,
2872                                                                H_PORT_CB4_JUMBO,
2873                                                                cb4);
2874                                 if (hret == H_SUCCESS)
2875                                         *jumbo = 1;
2876                         }
2877                 } else
2878                         ret = -EINVAL;
2879
2880                 free_page((unsigned long)cb4);
2881         }
2882 out:
2883         return ret;
2884 }
2885
2886 static ssize_t ehea_show_port_id(struct device *dev,
2887                                  struct device_attribute *attr, char *buf)
2888 {
2889         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2890         return sprintf(buf, "%d", port->logical_port_id);
2891 }
2892
2893 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2894                    NULL);
2895
2896 static void __devinit logical_port_release(struct device *dev)
2897 {
2898         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2899         of_node_put(port->ofdev.dev.of_node);
2900 }
2901
2902 static struct device *ehea_register_port(struct ehea_port *port,
2903                                          struct device_node *dn)
2904 {
2905         int ret;
2906
2907         port->ofdev.dev.of_node = of_node_get(dn);
2908         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2909         port->ofdev.dev.bus = &ibmebus_bus_type;
2910
2911         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2912         port->ofdev.dev.release = logical_port_release;
2913
2914         ret = of_device_register(&port->ofdev);
2915         if (ret) {
2916                 pr_err("failed to register device. ret=%d\n", ret);
2917                 goto out;
2918         }
2919
2920         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2921         if (ret) {
2922                 pr_err("failed to register attributes, ret=%d\n", ret);
2923                 goto out_unreg_of_dev;
2924         }
2925
2926         return &port->ofdev.dev;
2927
2928 out_unreg_of_dev:
2929         of_device_unregister(&port->ofdev);
2930 out:
2931         return NULL;
2932 }
2933
2934 static void ehea_unregister_port(struct ehea_port *port)
2935 {
2936         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2937         of_device_unregister(&port->ofdev);
2938 }
2939
2940 static const struct net_device_ops ehea_netdev_ops = {
2941         .ndo_open               = ehea_open,
2942         .ndo_stop               = ehea_stop,