37a190d85fcd6d467bf2f1314d2266b37e710858
[linux-3.10.git] / drivers / net / 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 #include <linux/in.h>
30 #include <linux/ip.h>
31 #include <linux/tcp.h>
32 #include <linux/udp.h>
33 #include <linux/if.h>
34 #include <linux/list.h>
35 #include <linux/if_ether.h>
36 #include <linux/notifier.h>
37 #include <linux/reboot.h>
38 #include <linux/memory.h>
39 #include <asm/kexec.h>
40 #include <linux/mutex.h>
41
42 #include <net/ip.h>
43
44 #include "ehea.h"
45 #include "ehea_qmr.h"
46 #include "ehea_phyp.h"
47
48
49 MODULE_LICENSE("GPL");
50 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
51 MODULE_DESCRIPTION("IBM eServer HEA Driver");
52 MODULE_VERSION(DRV_VERSION);
53
54
55 static int msg_level = -1;
56 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
57 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
58 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
59 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
60 static int use_mcs;
61 static int use_lro;
62 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
63 static int num_tx_qps = EHEA_NUM_TX_QP;
64 static int prop_carrier_state;
65
66 module_param(msg_level, int, 0);
67 module_param(rq1_entries, int, 0);
68 module_param(rq2_entries, int, 0);
69 module_param(rq3_entries, int, 0);
70 module_param(sq_entries, int, 0);
71 module_param(prop_carrier_state, int, 0);
72 module_param(use_mcs, int, 0);
73 module_param(use_lro, int, 0);
74 module_param(lro_max_aggr, int, 0);
75 module_param(num_tx_qps, int, 0);
76
77 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
78 MODULE_PARM_DESC(msg_level, "msg_level");
79 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
80                  "port to stack. 1:yes, 0:no.  Default = 0 ");
81 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
82                  "[2^x - 1], x = [6..14]. Default = "
83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
84 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
85                  "[2^x - 1], x = [6..14]. Default = "
86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
87 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
88                  "[2^x - 1], x = [6..14]. Default = "
89                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
90 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
91                  "[2^x - 1], x = [6..14]. Default = "
92                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
93 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
94
95 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
96                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
97 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
98                  "Default = 0");
99
100 static int port_name_cnt;
101 static LIST_HEAD(adapter_list);
102 static unsigned long ehea_driver_flags;
103 struct work_struct ehea_rereg_mr_task;
104 static DEFINE_MUTEX(dlpar_mem_lock);
105 struct ehea_fw_handle_array ehea_fw_handles;
106 struct ehea_bcmc_reg_array ehea_bcmc_regs;
107
108
109 static int __devinit ehea_probe_adapter(struct of_device *dev,
110                                         const struct of_device_id *id);
111
112 static int __devexit ehea_remove(struct of_device *dev);
113
114 static struct of_device_id ehea_device_table[] = {
115         {
116                 .name = "lhea",
117                 .compatible = "IBM,lhea",
118         },
119         {},
120 };
121 MODULE_DEVICE_TABLE(of, ehea_device_table);
122
123 static struct of_platform_driver ehea_driver = {
124         .name = "ehea",
125         .match_table = ehea_device_table,
126         .probe = ehea_probe_adapter,
127         .remove = ehea_remove,
128 };
129
130 void ehea_dump(void *adr, int len, char *msg)
131 {
132         int x;
133         unsigned char *deb = adr;
134         for (x = 0; x < len; x += 16) {
135                 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
136                           deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
137                 deb += 16;
138         }
139 }
140
141 void ehea_schedule_port_reset(struct ehea_port *port)
142 {
143         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
144                 schedule_work(&port->reset_task);
145 }
146
147 static void ehea_update_firmware_handles(void)
148 {
149         struct ehea_fw_handle_entry *arr = NULL;
150         struct ehea_adapter *adapter;
151         int num_adapters = 0;
152         int num_ports = 0;
153         int num_portres = 0;
154         int i = 0;
155         int num_fw_handles, k, l;
156
157         /* Determine number of handles */
158         mutex_lock(&ehea_fw_handles.lock);
159
160         list_for_each_entry(adapter, &adapter_list, list) {
161                 num_adapters++;
162
163                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
164                         struct ehea_port *port = adapter->port[k];
165
166                         if (!port || (port->state != EHEA_PORT_UP))
167                                 continue;
168
169                         num_ports++;
170                         num_portres += port->num_def_qps + port->num_add_tx_qps;
171                 }
172         }
173
174         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
175                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
176                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
177
178         if (num_fw_handles) {
179                 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
180                 if (!arr)
181                         goto out;  /* Keep the existing array */
182         } else
183                 goto out_update;
184
185         list_for_each_entry(adapter, &adapter_list, list) {
186                 if (num_adapters == 0)
187                         break;
188
189                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
190                         struct ehea_port *port = adapter->port[k];
191
192                         if (!port || (port->state != EHEA_PORT_UP)
193                                 || (num_ports == 0))
194                                 continue;
195
196                         for (l = 0;
197                              l < port->num_def_qps + port->num_add_tx_qps;
198                              l++) {
199                                 struct ehea_port_res *pr = &port->port_res[l];
200
201                                 arr[i].adh = adapter->handle;
202                                 arr[i++].fwh = pr->qp->fw_handle;
203                                 arr[i].adh = adapter->handle;
204                                 arr[i++].fwh = pr->send_cq->fw_handle;
205                                 arr[i].adh = adapter->handle;
206                                 arr[i++].fwh = pr->recv_cq->fw_handle;
207                                 arr[i].adh = adapter->handle;
208                                 arr[i++].fwh = pr->eq->fw_handle;
209                                 arr[i].adh = adapter->handle;
210                                 arr[i++].fwh = pr->send_mr.handle;
211                                 arr[i].adh = adapter->handle;
212                                 arr[i++].fwh = pr->recv_mr.handle;
213                         }
214                         arr[i].adh = adapter->handle;
215                         arr[i++].fwh = port->qp_eq->fw_handle;
216                         num_ports--;
217                 }
218
219                 arr[i].adh = adapter->handle;
220                 arr[i++].fwh = adapter->neq->fw_handle;
221
222                 if (adapter->mr.handle) {
223                         arr[i].adh = adapter->handle;
224                         arr[i++].fwh = adapter->mr.handle;
225                 }
226                 num_adapters--;
227         }
228
229 out_update:
230         kfree(ehea_fw_handles.arr);
231         ehea_fw_handles.arr = arr;
232         ehea_fw_handles.num_entries = i;
233 out:
234         mutex_unlock(&ehea_fw_handles.lock);
235 }
236
237 static void ehea_update_bcmc_registrations(void)
238 {
239         unsigned long flags;
240         struct ehea_bcmc_reg_entry *arr = NULL;
241         struct ehea_adapter *adapter;
242         struct ehea_mc_list *mc_entry;
243         int num_registrations = 0;
244         int i = 0;
245         int k;
246
247         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
248
249         /* Determine number of registrations */
250         list_for_each_entry(adapter, &adapter_list, list)
251                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
252                         struct ehea_port *port = adapter->port[k];
253
254                         if (!port || (port->state != EHEA_PORT_UP))
255                                 continue;
256
257                         num_registrations += 2; /* Broadcast registrations */
258
259                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
260                                 num_registrations += 2;
261                 }
262
263         if (num_registrations) {
264                 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
265                 if (!arr)
266                         goto out;  /* Keep the existing array */
267         } else
268                 goto out_update;
269
270         list_for_each_entry(adapter, &adapter_list, list) {
271                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
272                         struct ehea_port *port = adapter->port[k];
273
274                         if (!port || (port->state != EHEA_PORT_UP))
275                                 continue;
276
277                         if (num_registrations == 0)
278                                 goto out_update;
279
280                         arr[i].adh = adapter->handle;
281                         arr[i].port_id = port->logical_port_id;
282                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
283                                           EHEA_BCMC_UNTAGGED;
284                         arr[i++].macaddr = port->mac_addr;
285
286                         arr[i].adh = adapter->handle;
287                         arr[i].port_id = port->logical_port_id;
288                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
289                                           EHEA_BCMC_VLANID_ALL;
290                         arr[i++].macaddr = port->mac_addr;
291                         num_registrations -= 2;
292
293                         list_for_each_entry(mc_entry,
294                                             &port->mc_list->list, list) {
295                                 if (num_registrations == 0)
296                                         goto out_update;
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_UNTAGGED;
303                                 arr[i++].macaddr = mc_entry->macaddr;
304
305                                 arr[i].adh = adapter->handle;
306                                 arr[i].port_id = port->logical_port_id;
307                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
308                                                   EHEA_BCMC_MULTICAST |
309                                                   EHEA_BCMC_VLANID_ALL;
310                                 arr[i++].macaddr = mc_entry->macaddr;
311                                 num_registrations -= 2;
312                         }
313                 }
314         }
315
316 out_update:
317         kfree(ehea_bcmc_regs.arr);
318         ehea_bcmc_regs.arr = arr;
319         ehea_bcmc_regs.num_entries = i;
320 out:
321         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
322 }
323
324 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
325 {
326         struct ehea_port *port = netdev_priv(dev);
327         struct net_device_stats *stats = &port->stats;
328         struct hcp_ehea_port_cb2 *cb2;
329         u64 hret, rx_packets, tx_packets;
330         int i;
331
332         memset(stats, 0, sizeof(*stats));
333
334         cb2 = (void *)get_zeroed_page(GFP_ATOMIC);
335         if (!cb2) {
336                 ehea_error("no mem for cb2");
337                 goto out;
338         }
339
340         hret = ehea_h_query_ehea_port(port->adapter->handle,
341                                       port->logical_port_id,
342                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
343         if (hret != H_SUCCESS) {
344                 ehea_error("query_ehea_port failed");
345                 goto out_herr;
346         }
347
348         if (netif_msg_hw(port))
349                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
350
351         rx_packets = 0;
352         for (i = 0; i < port->num_def_qps; i++)
353                 rx_packets += port->port_res[i].rx_packets;
354
355         tx_packets = 0;
356         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
357                 tx_packets += port->port_res[i].tx_packets;
358
359         stats->tx_packets = tx_packets;
360         stats->multicast = cb2->rxmcp;
361         stats->rx_errors = cb2->rxuerr;
362         stats->rx_bytes = cb2->rxo;
363         stats->tx_bytes = cb2->txo;
364         stats->rx_packets = rx_packets;
365
366 out_herr:
367         free_page((unsigned long)cb2);
368 out:
369         return stats;
370 }
371
372 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
373 {
374         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
375         struct net_device *dev = pr->port->netdev;
376         int max_index_mask = pr->rq1_skba.len - 1;
377         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
378         int adder = 0;
379         int i;
380
381         pr->rq1_skba.os_skbs = 0;
382
383         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
384                 if (nr_of_wqes > 0)
385                         pr->rq1_skba.index = index;
386                 pr->rq1_skba.os_skbs = fill_wqes;
387                 return;
388         }
389
390         for (i = 0; i < fill_wqes; i++) {
391                 if (!skb_arr_rq1[index]) {
392                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
393                                                               EHEA_L_PKT_SIZE);
394                         if (!skb_arr_rq1[index]) {
395                                 pr->rq1_skba.os_skbs = fill_wqes - i;
396                                 break;
397                         }
398                 }
399                 index--;
400                 index &= max_index_mask;
401                 adder++;
402         }
403
404         if (adder == 0)
405                 return;
406
407         /* Ring doorbell */
408         ehea_update_rq1a(pr->qp, adder);
409 }
410
411 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
412 {
413         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
414         struct net_device *dev = pr->port->netdev;
415         int i;
416
417         for (i = 0; i < pr->rq1_skba.len; i++) {
418                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
419                 if (!skb_arr_rq1[i])
420                         break;
421         }
422         /* Ring doorbell */
423         ehea_update_rq1a(pr->qp, nr_rq1a);
424 }
425
426 static int ehea_refill_rq_def(struct ehea_port_res *pr,
427                               struct ehea_q_skb_arr *q_skba, int rq_nr,
428                               int num_wqes, int wqe_type, int packet_size)
429 {
430         struct net_device *dev = pr->port->netdev;
431         struct ehea_qp *qp = pr->qp;
432         struct sk_buff **skb_arr = q_skba->arr;
433         struct ehea_rwqe *rwqe;
434         int i, index, max_index_mask, fill_wqes;
435         int adder = 0;
436         int ret = 0;
437
438         fill_wqes = q_skba->os_skbs + num_wqes;
439         q_skba->os_skbs = 0;
440
441         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
442                 q_skba->os_skbs = fill_wqes;
443                 return ret;
444         }
445
446         index = q_skba->index;
447         max_index_mask = q_skba->len - 1;
448         for (i = 0; i < fill_wqes; i++) {
449                 u64 tmp_addr;
450                 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
451                 if (!skb) {
452                         q_skba->os_skbs = fill_wqes - i;
453                         if (q_skba->os_skbs == q_skba->len - 2) {
454                                 ehea_info("%s: rq%i ran dry - no mem for skb",
455                                           pr->port->netdev->name, rq_nr);
456                                 ret = -ENOMEM;
457                         }
458                         break;
459                 }
460                 skb_reserve(skb, NET_IP_ALIGN);
461
462                 skb_arr[index] = skb;
463                 tmp_addr = ehea_map_vaddr(skb->data);
464                 if (tmp_addr == -1) {
465                         dev_kfree_skb(skb);
466                         q_skba->os_skbs = fill_wqes - i;
467                         ret = 0;
468                         break;
469                 }
470
471                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
472                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
473                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
474                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
475                 rwqe->sg_list[0].vaddr = tmp_addr;
476                 rwqe->sg_list[0].len = packet_size;
477                 rwqe->data_segments = 1;
478
479                 index++;
480                 index &= max_index_mask;
481                 adder++;
482         }
483
484         q_skba->index = index;
485         if (adder == 0)
486                 goto out;
487
488         /* Ring doorbell */
489         iosync();
490         if (rq_nr == 2)
491                 ehea_update_rq2a(pr->qp, adder);
492         else
493                 ehea_update_rq3a(pr->qp, adder);
494 out:
495         return ret;
496 }
497
498
499 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
500 {
501         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
502                                   nr_of_wqes, EHEA_RWQE2_TYPE,
503                                   EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
504 }
505
506
507 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
508 {
509         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
510                                   nr_of_wqes, EHEA_RWQE3_TYPE,
511                                   EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
512 }
513
514 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
515 {
516         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
517         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
518                 return 0;
519         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
520             (cqe->header_length == 0))
521                 return 0;
522         return -EINVAL;
523 }
524
525 static inline void ehea_fill_skb(struct net_device *dev,
526                                  struct sk_buff *skb, struct ehea_cqe *cqe)
527 {
528         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
529
530         skb_put(skb, length);
531         skb->ip_summed = CHECKSUM_UNNECESSARY;
532         skb->protocol = eth_type_trans(skb, dev);
533 }
534
535 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
536                                                int arr_len,
537                                                struct ehea_cqe *cqe)
538 {
539         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
540         struct sk_buff *skb;
541         void *pref;
542         int x;
543
544         x = skb_index + 1;
545         x &= (arr_len - 1);
546
547         pref = skb_array[x];
548         prefetchw(pref);
549         prefetchw(pref + EHEA_CACHE_LINE);
550
551         pref = (skb_array[x]->data);
552         prefetch(pref);
553         prefetch(pref + EHEA_CACHE_LINE);
554         prefetch(pref + EHEA_CACHE_LINE * 2);
555         prefetch(pref + EHEA_CACHE_LINE * 3);
556         skb = skb_array[skb_index];
557         skb_array[skb_index] = NULL;
558         return skb;
559 }
560
561 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
562                                                   int arr_len, int wqe_index)
563 {
564         struct sk_buff *skb;
565         void *pref;
566         int x;
567
568         x = wqe_index + 1;
569         x &= (arr_len - 1);
570
571         pref = skb_array[x];
572         prefetchw(pref);
573         prefetchw(pref + EHEA_CACHE_LINE);
574
575         pref = (skb_array[x]->data);
576         prefetchw(pref);
577         prefetchw(pref + EHEA_CACHE_LINE);
578
579         skb = skb_array[wqe_index];
580         skb_array[wqe_index] = NULL;
581         return skb;
582 }
583
584 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
585                                  struct ehea_cqe *cqe, int *processed_rq2,
586                                  int *processed_rq3)
587 {
588         struct sk_buff *skb;
589
590         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
591                 pr->p_stats.err_tcp_cksum++;
592         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
593                 pr->p_stats.err_ip_cksum++;
594         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
595                 pr->p_stats.err_frame_crc++;
596
597         if (rq == 2) {
598                 *processed_rq2 += 1;
599                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
600                 dev_kfree_skb(skb);
601         } else if (rq == 3) {
602                 *processed_rq3 += 1;
603                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
604                 dev_kfree_skb(skb);
605         }
606
607         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
608                 if (netif_msg_rx_err(pr->port)) {
609                         ehea_error("Critical receive error for QP %d. "
610                                    "Resetting port.", pr->qp->init_attr.qp_nr);
611                         ehea_dump(cqe, sizeof(*cqe), "CQE");
612                 }
613                 ehea_schedule_port_reset(pr->port);
614                 return 1;
615         }
616
617         return 0;
618 }
619
620 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
621                        void **tcph, u64 *hdr_flags, void *priv)
622 {
623         struct ehea_cqe *cqe = priv;
624         unsigned int ip_len;
625         struct iphdr *iph;
626
627         /* non tcp/udp packets */
628         if (!cqe->header_length)
629                 return -1;
630
631         /* non tcp packet */
632         skb_reset_network_header(skb);
633         iph = ip_hdr(skb);
634         if (iph->protocol != IPPROTO_TCP)
635                 return -1;
636
637         ip_len = ip_hdrlen(skb);
638         skb_set_transport_header(skb, ip_len);
639         *tcph = tcp_hdr(skb);
640
641         /* check if ip header and tcp header are complete */
642         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
643                 return -1;
644
645         *hdr_flags = LRO_IPV4 | LRO_TCP;
646         *iphdr = iph;
647
648         return 0;
649 }
650
651 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
652                           struct sk_buff *skb)
653 {
654         int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
655                 && pr->port->vgrp;
656
657         if (use_lro) {
658                 if (vlan_extracted)
659                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
660                                                      pr->port->vgrp,
661                                                      cqe->vlan_tag,
662                                                      cqe);
663                 else
664                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
665         } else {
666                 if (vlan_extracted)
667                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
668                                                  cqe->vlan_tag);
669                 else
670                         netif_receive_skb(skb);
671         }
672 }
673
674 static int ehea_proc_rwqes(struct net_device *dev,
675                            struct ehea_port_res *pr,
676                            int budget)
677 {
678         struct ehea_port *port = pr->port;
679         struct ehea_qp *qp = pr->qp;
680         struct ehea_cqe *cqe;
681         struct sk_buff *skb;
682         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
683         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
684         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
685         int skb_arr_rq1_len = pr->rq1_skba.len;
686         int skb_arr_rq2_len = pr->rq2_skba.len;
687         int skb_arr_rq3_len = pr->rq3_skba.len;
688         int processed, processed_rq1, processed_rq2, processed_rq3;
689         int wqe_index, last_wqe_index, rq, port_reset;
690
691         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
692         last_wqe_index = 0;
693
694         cqe = ehea_poll_rq1(qp, &wqe_index);
695         while ((processed < budget) && cqe) {
696                 ehea_inc_rq1(qp);
697                 processed_rq1++;
698                 processed++;
699                 if (netif_msg_rx_status(port))
700                         ehea_dump(cqe, sizeof(*cqe), "CQE");
701
702                 last_wqe_index = wqe_index;
703                 rmb();
704                 if (!ehea_check_cqe(cqe, &rq)) {
705                         if (rq == 1) {
706                                 /* LL RQ1 */
707                                 skb = get_skb_by_index_ll(skb_arr_rq1,
708                                                           skb_arr_rq1_len,
709                                                           wqe_index);
710                                 if (unlikely(!skb)) {
711                                         if (netif_msg_rx_err(port))
712                                                 ehea_error("LL rq1: skb=NULL");
713
714                                         skb = netdev_alloc_skb(dev,
715                                                                EHEA_L_PKT_SIZE);
716                                         if (!skb)
717                                                 break;
718                                 }
719                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
720                                                  cqe->num_bytes_transfered - 4);
721                                 ehea_fill_skb(dev, skb, cqe);
722                         } else if (rq == 2) {
723                                 /* RQ2 */
724                                 skb = get_skb_by_index(skb_arr_rq2,
725                                                        skb_arr_rq2_len, cqe);
726                                 if (unlikely(!skb)) {
727                                         if (netif_msg_rx_err(port))
728                                                 ehea_error("rq2: skb=NULL");
729                                         break;
730                                 }
731                                 ehea_fill_skb(dev, skb, cqe);
732                                 processed_rq2++;
733                         } else {
734                                 /* RQ3 */
735                                 skb = get_skb_by_index(skb_arr_rq3,
736                                                        skb_arr_rq3_len, cqe);
737                                 if (unlikely(!skb)) {
738                                         if (netif_msg_rx_err(port))
739                                                 ehea_error("rq3: skb=NULL");
740                                         break;
741                                 }
742                                 ehea_fill_skb(dev, skb, cqe);
743                                 processed_rq3++;
744                         }
745
746                         ehea_proc_skb(pr, cqe, skb);
747                 } else {
748                         pr->p_stats.poll_receive_errors++;
749                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
750                                                            &processed_rq2,
751                                                            &processed_rq3);
752                         if (port_reset)
753                                 break;
754                 }
755                 cqe = ehea_poll_rq1(qp, &wqe_index);
756         }
757         if (use_lro)
758                 lro_flush_all(&pr->lro_mgr);
759
760         pr->rx_packets += processed;
761
762         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
763         ehea_refill_rq2(pr, processed_rq2);
764         ehea_refill_rq3(pr, processed_rq3);
765
766         return processed;
767 }
768
769 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
770 {
771         struct sk_buff *skb;
772         struct ehea_cq *send_cq = pr->send_cq;
773         struct ehea_cqe *cqe;
774         int quota = my_quota;
775         int cqe_counter = 0;
776         int swqe_av = 0;
777         int index;
778         unsigned long flags;
779
780         cqe = ehea_poll_cq(send_cq);
781         while (cqe && (quota > 0)) {
782                 ehea_inc_cq(send_cq);
783
784                 cqe_counter++;
785                 rmb();
786                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
787                         ehea_error("Send Completion Error: Resetting port");
788                         if (netif_msg_tx_err(pr->port))
789                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
790                         ehea_schedule_port_reset(pr->port);
791                         break;
792                 }
793
794                 if (netif_msg_tx_done(pr->port))
795                         ehea_dump(cqe, sizeof(*cqe), "CQE");
796
797                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
798                            == EHEA_SWQE2_TYPE)) {
799
800                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
801                         skb = pr->sq_skba.arr[index];
802                         dev_kfree_skb(skb);
803                         pr->sq_skba.arr[index] = NULL;
804                 }
805
806                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
807                 quota--;
808
809                 cqe = ehea_poll_cq(send_cq);
810         };
811
812         ehea_update_feca(send_cq, cqe_counter);
813         atomic_add(swqe_av, &pr->swqe_avail);
814
815         spin_lock_irqsave(&pr->netif_queue, flags);
816
817         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
818                                   >= pr->swqe_refill_th)) {
819                 netif_wake_queue(pr->port->netdev);
820                 pr->queue_stopped = 0;
821         }
822         spin_unlock_irqrestore(&pr->netif_queue, flags);
823
824         return cqe;
825 }
826
827 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
828 #define EHEA_POLL_MAX_CQES 65535
829
830 static int ehea_poll(struct napi_struct *napi, int budget)
831 {
832         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
833                                                 napi);
834         struct net_device *dev = pr->port->netdev;
835         struct ehea_cqe *cqe;
836         struct ehea_cqe *cqe_skb = NULL;
837         int force_irq, wqe_index;
838         int rx = 0;
839
840         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
841         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
842
843         if (!force_irq)
844                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
845
846         while ((rx != budget) || force_irq) {
847                 pr->poll_counter = 0;
848                 force_irq = 0;
849                 napi_complete(napi);
850                 ehea_reset_cq_ep(pr->recv_cq);
851                 ehea_reset_cq_ep(pr->send_cq);
852                 ehea_reset_cq_n1(pr->recv_cq);
853                 ehea_reset_cq_n1(pr->send_cq);
854                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
855                 cqe_skb = ehea_poll_cq(pr->send_cq);
856
857                 if (!cqe && !cqe_skb)
858                         return rx;
859
860                 if (!napi_reschedule(napi))
861                         return rx;
862
863                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
864                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
865         }
866
867         pr->poll_counter++;
868         return rx;
869 }
870
871 #ifdef CONFIG_NET_POLL_CONTROLLER
872 static void ehea_netpoll(struct net_device *dev)
873 {
874         struct ehea_port *port = netdev_priv(dev);
875         int i;
876
877         for (i = 0; i < port->num_def_qps; i++)
878                 napi_schedule(&port->port_res[i].napi);
879 }
880 #endif
881
882 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
883 {
884         struct ehea_port_res *pr = param;
885
886         napi_schedule(&pr->napi);
887
888         return IRQ_HANDLED;
889 }
890
891 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
892 {
893         struct ehea_port *port = param;
894         struct ehea_eqe *eqe;
895         struct ehea_qp *qp;
896         u32 qp_token;
897
898         eqe = ehea_poll_eq(port->qp_eq);
899
900         while (eqe) {
901                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
902                 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
903                            eqe->entry, qp_token);
904
905                 qp = port->port_res[qp_token].qp;
906                 ehea_error_data(port->adapter, qp->fw_handle);
907                 eqe = ehea_poll_eq(port->qp_eq);
908         }
909
910         ehea_schedule_port_reset(port);
911
912         return IRQ_HANDLED;
913 }
914
915 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
916                                        int logical_port)
917 {
918         int i;
919
920         for (i = 0; i < EHEA_MAX_PORTS; i++)
921                 if (adapter->port[i])
922                         if (adapter->port[i]->logical_port_id == logical_port)
923                                 return adapter->port[i];
924         return NULL;
925 }
926
927 int ehea_sense_port_attr(struct ehea_port *port)
928 {
929         int ret;
930         u64 hret;
931         struct hcp_ehea_port_cb0 *cb0;
932
933         /* may be called via ehea_neq_tasklet() */
934         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
935         if (!cb0) {
936                 ehea_error("no mem for cb0");
937                 ret = -ENOMEM;
938                 goto out;
939         }
940
941         hret = ehea_h_query_ehea_port(port->adapter->handle,
942                                       port->logical_port_id, H_PORT_CB0,
943                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
944                                       cb0);
945         if (hret != H_SUCCESS) {
946                 ret = -EIO;
947                 goto out_free;
948         }
949
950         /* MAC address */
951         port->mac_addr = cb0->port_mac_addr << 16;
952
953         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
954                 ret = -EADDRNOTAVAIL;
955                 goto out_free;
956         }
957
958         /* Port speed */
959         switch (cb0->port_speed) {
960         case H_SPEED_10M_H:
961                 port->port_speed = EHEA_SPEED_10M;
962                 port->full_duplex = 0;
963                 break;
964         case H_SPEED_10M_F:
965                 port->port_speed = EHEA_SPEED_10M;
966                 port->full_duplex = 1;
967                 break;
968         case H_SPEED_100M_H:
969                 port->port_speed = EHEA_SPEED_100M;
970                 port->full_duplex = 0;
971                 break;
972         case H_SPEED_100M_F:
973                 port->port_speed = EHEA_SPEED_100M;
974                 port->full_duplex = 1;
975                 break;
976         case H_SPEED_1G_F:
977                 port->port_speed = EHEA_SPEED_1G;
978                 port->full_duplex = 1;
979                 break;
980         case H_SPEED_10G_F:
981                 port->port_speed = EHEA_SPEED_10G;
982                 port->full_duplex = 1;
983                 break;
984         default:
985                 port->port_speed = 0;
986                 port->full_duplex = 0;
987                 break;
988         }
989
990         port->autoneg = 1;
991         port->num_mcs = cb0->num_default_qps;
992
993         /* Number of default QPs */
994         if (use_mcs)
995                 port->num_def_qps = cb0->num_default_qps;
996         else
997                 port->num_def_qps = 1;
998
999         if (!port->num_def_qps) {
1000                 ret = -EINVAL;
1001                 goto out_free;
1002         }
1003
1004         port->num_tx_qps = num_tx_qps;
1005
1006         if (port->num_def_qps >= port->num_tx_qps)
1007                 port->num_add_tx_qps = 0;
1008         else
1009                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1010
1011         ret = 0;
1012 out_free:
1013         if (ret || netif_msg_probe(port))
1014                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1015         free_page((unsigned long)cb0);
1016 out:
1017         return ret;
1018 }
1019
1020 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1021 {
1022         struct hcp_ehea_port_cb4 *cb4;
1023         u64 hret;
1024         int ret = 0;
1025
1026         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1027         if (!cb4) {
1028                 ehea_error("no mem for cb4");
1029                 ret = -ENOMEM;
1030                 goto out;
1031         }
1032
1033         cb4->port_speed = port_speed;
1034
1035         netif_carrier_off(port->netdev);
1036
1037         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1038                                        port->logical_port_id,
1039                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1040         if (hret == H_SUCCESS) {
1041                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1042
1043                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1044                                               port->logical_port_id,
1045                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1046                                               cb4);
1047                 if (hret == H_SUCCESS) {
1048                         switch (cb4->port_speed) {
1049                         case H_SPEED_10M_H:
1050                                 port->port_speed = EHEA_SPEED_10M;
1051                                 port->full_duplex = 0;
1052                                 break;
1053                         case H_SPEED_10M_F:
1054                                 port->port_speed = EHEA_SPEED_10M;
1055                                 port->full_duplex = 1;
1056                                 break;
1057                         case H_SPEED_100M_H:
1058                                 port->port_speed = EHEA_SPEED_100M;
1059                                 port->full_duplex = 0;
1060                                 break;
1061                         case H_SPEED_100M_F:
1062                                 port->port_speed = EHEA_SPEED_100M;
1063                                 port->full_duplex = 1;
1064                                 break;
1065                         case H_SPEED_1G_F:
1066                                 port->port_speed = EHEA_SPEED_1G;
1067                                 port->full_duplex = 1;
1068                                 break;
1069                         case H_SPEED_10G_F:
1070                                 port->port_speed = EHEA_SPEED_10G;
1071                                 port->full_duplex = 1;
1072                                 break;
1073                         default:
1074                                 port->port_speed = 0;
1075                                 port->full_duplex = 0;
1076                                 break;
1077                         }
1078                 } else {
1079                         ehea_error("Failed sensing port speed");
1080                         ret = -EIO;
1081                 }
1082         } else {
1083                 if (hret == H_AUTHORITY) {
1084                         ehea_info("Hypervisor denied setting port speed");
1085                         ret = -EPERM;
1086                 } else {
1087                         ret = -EIO;
1088                         ehea_error("Failed setting port speed");
1089                 }
1090         }
1091         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1092                 netif_carrier_on(port->netdev);
1093
1094         free_page((unsigned long)cb4);
1095 out:
1096         return ret;
1097 }
1098
1099 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1100 {
1101         int ret;
1102         u8 ec;
1103         u8 portnum;
1104         struct ehea_port *port;
1105
1106         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1107         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1108         port = ehea_get_port(adapter, portnum);
1109
1110         switch (ec) {
1111         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1112
1113                 if (!port) {
1114                         ehea_error("unknown portnum %x", portnum);
1115                         break;
1116                 }
1117
1118                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1119                         if (!netif_carrier_ok(port->netdev)) {
1120                                 ret = ehea_sense_port_attr(port);
1121                                 if (ret) {
1122                                         ehea_error("failed resensing port "
1123                                                    "attributes");
1124                                         break;
1125                                 }
1126
1127                                 if (netif_msg_link(port))
1128                                         ehea_info("%s: Logical port up: %dMbps "
1129                                                   "%s Duplex",
1130                                                   port->netdev->name,
1131                                                   port->port_speed,
1132                                                   port->full_duplex ==
1133                                                   1 ? "Full" : "Half");
1134
1135                                 netif_carrier_on(port->netdev);
1136                                 netif_wake_queue(port->netdev);
1137                         }
1138                 } else
1139                         if (netif_carrier_ok(port->netdev)) {
1140                                 if (netif_msg_link(port))
1141                                         ehea_info("%s: Logical port down",
1142                                                   port->netdev->name);
1143                                 netif_carrier_off(port->netdev);
1144                                 netif_stop_queue(port->netdev);
1145                         }
1146
1147                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1148                         port->phy_link = EHEA_PHY_LINK_UP;
1149                         if (netif_msg_link(port))
1150                                 ehea_info("%s: Physical port up",
1151                                           port->netdev->name);
1152                         if (prop_carrier_state)
1153                                 netif_carrier_on(port->netdev);
1154                 } else {
1155                         port->phy_link = EHEA_PHY_LINK_DOWN;
1156                         if (netif_msg_link(port))
1157                                 ehea_info("%s: Physical port down",
1158                                           port->netdev->name);
1159                         if (prop_carrier_state)
1160                                 netif_carrier_off(port->netdev);
1161                 }
1162
1163                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1164                         ehea_info("External switch port is primary port");
1165                 else
1166                         ehea_info("External switch port is backup port");
1167
1168                 break;
1169         case EHEA_EC_ADAPTER_MALFUNC:
1170                 ehea_error("Adapter malfunction");
1171                 break;
1172         case EHEA_EC_PORT_MALFUNC:
1173                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1174                 netif_carrier_off(port->netdev);
1175                 netif_stop_queue(port->netdev);
1176                 break;
1177         default:
1178                 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1179                 break;
1180         }
1181 }
1182
1183 static void ehea_neq_tasklet(unsigned long data)
1184 {
1185         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1186         struct ehea_eqe *eqe;
1187         u64 event_mask;
1188
1189         eqe = ehea_poll_eq(adapter->neq);
1190         ehea_debug("eqe=%p", eqe);
1191
1192         while (eqe) {
1193                 ehea_debug("*eqe=%lx", eqe->entry);
1194                 ehea_parse_eqe(adapter, eqe->entry);
1195                 eqe = ehea_poll_eq(adapter->neq);
1196                 ehea_debug("next eqe=%p", eqe);
1197         }
1198
1199         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1200                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1201                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1202
1203         ehea_h_reset_events(adapter->handle,
1204                             adapter->neq->fw_handle, event_mask);
1205 }
1206
1207 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1208 {
1209         struct ehea_adapter *adapter = param;
1210         tasklet_hi_schedule(&adapter->neq_tasklet);
1211         return IRQ_HANDLED;
1212 }
1213
1214
1215 static int ehea_fill_port_res(struct ehea_port_res *pr)
1216 {
1217         int ret;
1218         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1219
1220         ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1221                                - init_attr->act_nr_rwqes_rq2
1222                                - init_attr->act_nr_rwqes_rq3 - 1);
1223
1224         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1225
1226         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1227
1228         return ret;
1229 }
1230
1231 static int ehea_reg_interrupts(struct net_device *dev)
1232 {
1233         struct ehea_port *port = netdev_priv(dev);
1234         struct ehea_port_res *pr;
1235         int i, ret;
1236
1237
1238         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1239                  dev->name);
1240
1241         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1242                                   ehea_qp_aff_irq_handler,
1243                                   IRQF_DISABLED, port->int_aff_name, port);
1244         if (ret) {
1245                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1246                            "ist=%X", port->qp_eq->attr.ist1);
1247                 goto out_free_qpeq;
1248         }
1249
1250         if (netif_msg_ifup(port))
1251                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1252                           "registered", port->qp_eq->attr.ist1);
1253
1254
1255         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1256                 pr = &port->port_res[i];
1257                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1258                          "%s-queue%d", dev->name, i);
1259                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1260                                           ehea_recv_irq_handler,
1261                                           IRQF_DISABLED, pr->int_send_name,
1262                                           pr);
1263                 if (ret) {
1264                         ehea_error("failed registering irq for ehea_queue "
1265                                    "port_res_nr:%d, ist=%X", i,
1266                                    pr->eq->attr.ist1);
1267                         goto out_free_req;
1268                 }
1269                 if (netif_msg_ifup(port))
1270                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1271                                   "%d registered", pr->eq->attr.ist1, i);
1272         }
1273 out:
1274         return ret;
1275
1276
1277 out_free_req:
1278         while (--i >= 0) {
1279                 u32 ist = port->port_res[i].eq->attr.ist1;
1280                 ibmebus_free_irq(ist, &port->port_res[i]);
1281         }
1282
1283 out_free_qpeq:
1284         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1285         i = port->num_def_qps;
1286
1287         goto out;
1288
1289 }
1290
1291 static void ehea_free_interrupts(struct net_device *dev)
1292 {
1293         struct ehea_port *port = netdev_priv(dev);
1294         struct ehea_port_res *pr;
1295         int i;
1296
1297         /* send */
1298
1299         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1300                 pr = &port->port_res[i];
1301                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1302                 if (netif_msg_intr(port))
1303                         ehea_info("free send irq for res %d with handle 0x%X",
1304                                   i, pr->eq->attr.ist1);
1305         }
1306
1307         /* associated events */
1308         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1309         if (netif_msg_intr(port))
1310                 ehea_info("associated event interrupt for handle 0x%X freed",
1311                           port->qp_eq->attr.ist1);
1312 }
1313
1314 static int ehea_configure_port(struct ehea_port *port)
1315 {
1316         int ret, i;
1317         u64 hret, mask;
1318         struct hcp_ehea_port_cb0 *cb0;
1319
1320         ret = -ENOMEM;
1321         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1322         if (!cb0)
1323                 goto out;
1324
1325         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1326                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1327                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1328                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1329                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1330                                       PXLY_RC_VLAN_FILTER)
1331                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1332
1333         for (i = 0; i < port->num_mcs; i++)
1334                 if (use_mcs)
1335                         cb0->default_qpn_arr[i] =
1336                                 port->port_res[i].qp->init_attr.qp_nr;
1337                 else
1338                         cb0->default_qpn_arr[i] =
1339                                 port->port_res[0].qp->init_attr.qp_nr;
1340
1341         if (netif_msg_ifup(port))
1342                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1343
1344         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1345              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1346
1347         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1348                                        port->logical_port_id,
1349                                        H_PORT_CB0, mask, cb0);
1350         ret = -EIO;
1351         if (hret != H_SUCCESS)
1352                 goto out_free;
1353
1354         ret = 0;
1355
1356 out_free:
1357         free_page((unsigned long)cb0);
1358 out:
1359         return ret;
1360 }
1361
1362 int ehea_gen_smrs(struct ehea_port_res *pr)
1363 {
1364         int ret;
1365         struct ehea_adapter *adapter = pr->port->adapter;
1366
1367         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1368         if (ret)
1369                 goto out;
1370
1371         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1372         if (ret)
1373                 goto out_free;
1374
1375         return 0;
1376
1377 out_free:
1378         ehea_rem_mr(&pr->send_mr);
1379 out:
1380         ehea_error("Generating SMRS failed\n");
1381         return -EIO;
1382 }
1383
1384 int ehea_rem_smrs(struct ehea_port_res *pr)
1385 {
1386         if ((ehea_rem_mr(&pr->send_mr))
1387             || (ehea_rem_mr(&pr->recv_mr)))
1388                 return -EIO;
1389         else
1390                 return 0;
1391 }
1392
1393 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1394 {
1395         int arr_size = sizeof(void *) * max_q_entries;
1396
1397         q_skba->arr = vmalloc(arr_size);
1398         if (!q_skba->arr)
1399                 return -ENOMEM;
1400
1401         memset(q_skba->arr, 0, arr_size);
1402
1403         q_skba->len = max_q_entries;
1404         q_skba->index = 0;
1405         q_skba->os_skbs = 0;
1406
1407         return 0;
1408 }
1409
1410 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1411                               struct port_res_cfg *pr_cfg, int queue_token)
1412 {
1413         struct ehea_adapter *adapter = port->adapter;
1414         enum ehea_eq_type eq_type = EHEA_EQ;
1415         struct ehea_qp_init_attr *init_attr = NULL;
1416         int ret = -EIO;
1417
1418         memset(pr, 0, sizeof(struct ehea_port_res));
1419
1420         pr->port = port;
1421         spin_lock_init(&pr->xmit_lock);
1422         spin_lock_init(&pr->netif_queue);
1423
1424         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1425         if (!pr->eq) {
1426                 ehea_error("create_eq failed (eq)");
1427                 goto out_free;
1428         }
1429
1430         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1431                                      pr->eq->fw_handle,
1432                                      port->logical_port_id);
1433         if (!pr->recv_cq) {
1434                 ehea_error("create_cq failed (cq_recv)");
1435                 goto out_free;
1436         }
1437
1438         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1439                                      pr->eq->fw_handle,
1440                                      port->logical_port_id);
1441         if (!pr->send_cq) {
1442                 ehea_error("create_cq failed (cq_send)");
1443                 goto out_free;
1444         }
1445
1446         if (netif_msg_ifup(port))
1447                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1448                           pr->send_cq->attr.act_nr_of_cqes,
1449                           pr->recv_cq->attr.act_nr_of_cqes);
1450
1451         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1452         if (!init_attr) {
1453                 ret = -ENOMEM;
1454                 ehea_error("no mem for ehea_qp_init_attr");
1455                 goto out_free;
1456         }
1457
1458         init_attr->low_lat_rq1 = 1;
1459         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1460         init_attr->rq_count = 3;
1461         init_attr->qp_token = queue_token;
1462         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1463         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1464         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1465         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1466         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1467         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1468         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1469         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1470         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1471         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1472         init_attr->port_nr = port->logical_port_id;
1473         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1474         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1475         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1476
1477         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1478         if (!pr->qp) {
1479                 ehea_error("create_qp failed");
1480                 ret = -EIO;
1481                 goto out_free;
1482         }
1483
1484         if (netif_msg_ifup(port))
1485                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1486                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1487                           init_attr->act_nr_send_wqes,
1488                           init_attr->act_nr_rwqes_rq1,
1489                           init_attr->act_nr_rwqes_rq2,
1490                           init_attr->act_nr_rwqes_rq3);
1491
1492         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1493
1494         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1495         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1496         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1497         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1498         if (ret)
1499                 goto out_free;
1500
1501         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1502         if (ehea_gen_smrs(pr) != 0) {
1503                 ret = -EIO;
1504                 goto out_free;
1505         }
1506
1507         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1508
1509         kfree(init_attr);
1510
1511         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1512
1513         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1514         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1515         pr->lro_mgr.lro_arr = pr->lro_desc;
1516         pr->lro_mgr.get_skb_header = get_skb_hdr;
1517         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1518         pr->lro_mgr.dev = port->netdev;
1519         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1520         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1521
1522         ret = 0;
1523         goto out;
1524
1525 out_free:
1526         kfree(init_attr);
1527         vfree(pr->sq_skba.arr);
1528         vfree(pr->rq1_skba.arr);
1529         vfree(pr->rq2_skba.arr);
1530         vfree(pr->rq3_skba.arr);
1531         ehea_destroy_qp(pr->qp);
1532         ehea_destroy_cq(pr->send_cq);
1533         ehea_destroy_cq(pr->recv_cq);
1534         ehea_destroy_eq(pr->eq);
1535 out:
1536         return ret;
1537 }
1538
1539 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1540 {
1541         int ret, i;
1542
1543         ret = ehea_destroy_qp(pr->qp);
1544
1545         if (!ret) {
1546                 ehea_destroy_cq(pr->send_cq);
1547                 ehea_destroy_cq(pr->recv_cq);
1548                 ehea_destroy_eq(pr->eq);
1549
1550                 for (i = 0; i < pr->rq1_skba.len; i++)
1551                         if (pr->rq1_skba.arr[i])
1552                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1553
1554                 for (i = 0; i < pr->rq2_skba.len; i++)
1555                         if (pr->rq2_skba.arr[i])
1556                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1557
1558                 for (i = 0; i < pr->rq3_skba.len; i++)
1559                         if (pr->rq3_skba.arr[i])
1560                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1561
1562                 for (i = 0; i < pr->sq_skba.len; i++)
1563                         if (pr->sq_skba.arr[i])
1564                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1565
1566                 vfree(pr->rq1_skba.arr);
1567                 vfree(pr->rq2_skba.arr);
1568                 vfree(pr->rq3_skba.arr);
1569                 vfree(pr->sq_skba.arr);
1570                 ret = ehea_rem_smrs(pr);
1571         }
1572         return ret;
1573 }
1574
1575 /*
1576  * The write_* functions store information in swqe which is used by
1577  * the hardware to calculate the ip/tcp/udp checksum
1578  */
1579
1580 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1581                                       const struct sk_buff *skb)
1582 {
1583         swqe->ip_start = skb_network_offset(skb);
1584         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1585 }
1586
1587 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1588                                         const struct sk_buff *skb)
1589 {
1590         swqe->tcp_offset =
1591                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1592
1593         swqe->tcp_end = (u16)skb->len - 1;
1594 }
1595
1596 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1597                                         const struct sk_buff *skb)
1598 {
1599         swqe->tcp_offset =
1600                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1601
1602         swqe->tcp_end = (u16)skb->len - 1;
1603 }
1604
1605
1606 static void write_swqe2_TSO(struct sk_buff *skb,
1607                             struct ehea_swqe *swqe, u32 lkey)
1608 {
1609         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1610         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1611         int skb_data_size = skb->len - skb->data_len;
1612         int headersize;
1613
1614         /* Packet is TCP with TSO enabled */
1615         swqe->tx_control |= EHEA_SWQE_TSO;
1616         swqe->mss = skb_shinfo(skb)->gso_size;
1617         /* copy only eth/ip/tcp headers to immediate data and
1618          * the rest of skb->data to sg1entry
1619          */
1620         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1621
1622         skb_data_size = skb->len - skb->data_len;
1623
1624         if (skb_data_size >= headersize) {
1625                 /* copy immediate data */
1626                 skb_copy_from_linear_data(skb, imm_data, headersize);
1627                 swqe->immediate_data_length = headersize;
1628
1629                 if (skb_data_size > headersize) {
1630                         /* set sg1entry data */
1631                         sg1entry->l_key = lkey;
1632                         sg1entry->len = skb_data_size - headersize;
1633                         sg1entry->vaddr =
1634                                 ehea_map_vaddr(skb->data + headersize);
1635                         swqe->descriptors++;
1636                 }
1637         } else
1638                 ehea_error("cannot handle fragmented headers");
1639 }
1640
1641 static void write_swqe2_nonTSO(struct sk_buff *skb,
1642                                struct ehea_swqe *swqe, u32 lkey)
1643 {
1644         int skb_data_size = skb->len - skb->data_len;
1645         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1646         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1647
1648         /* Packet is any nonTSO type
1649          *
1650          * Copy as much as possible skb->data to immediate data and
1651          * the rest to sg1entry
1652          */
1653         if (skb_data_size >= SWQE2_MAX_IMM) {
1654                 /* copy immediate data */
1655                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1656
1657                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1658
1659                 if (skb_data_size > SWQE2_MAX_IMM) {
1660                         /* copy sg1entry data */
1661                         sg1entry->l_key = lkey;
1662                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1663                         sg1entry->vaddr =
1664                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1665                         swqe->descriptors++;
1666                 }
1667         } else {
1668                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1669                 swqe->immediate_data_length = skb_data_size;
1670         }
1671 }
1672
1673 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1674                                     struct ehea_swqe *swqe, u32 lkey)
1675 {
1676         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1677         skb_frag_t *frag;
1678         int nfrags, sg1entry_contains_frag_data, i;
1679
1680         nfrags = skb_shinfo(skb)->nr_frags;
1681         sg1entry = &swqe->u.immdata_desc.sg_entry;
1682         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1683         swqe->descriptors = 0;
1684         sg1entry_contains_frag_data = 0;
1685
1686         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1687                 write_swqe2_TSO(skb, swqe, lkey);
1688         else
1689                 write_swqe2_nonTSO(skb, swqe, lkey);
1690
1691         /* write descriptors */
1692         if (nfrags > 0) {
1693                 if (swqe->descriptors == 0) {
1694                         /* sg1entry not yet used */
1695                         frag = &skb_shinfo(skb)->frags[0];
1696
1697                         /* copy sg1entry data */
1698                         sg1entry->l_key = lkey;
1699                         sg1entry->len = frag->size;
1700                         sg1entry->vaddr =
1701                                 ehea_map_vaddr(page_address(frag->page)
1702                                                + frag->page_offset);
1703                         swqe->descriptors++;
1704                         sg1entry_contains_frag_data = 1;
1705                 }
1706
1707                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1708
1709                         frag = &skb_shinfo(skb)->frags[i];
1710                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1711
1712                         sgentry->l_key = lkey;
1713                         sgentry->len = frag->size;
1714                         sgentry->vaddr =
1715                                 ehea_map_vaddr(page_address(frag->page)
1716                                                + frag->page_offset);
1717                         swqe->descriptors++;
1718                 }
1719         }
1720 }
1721
1722 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1723 {
1724         int ret = 0;
1725         u64 hret;
1726         u8 reg_type;
1727
1728         /* De/Register untagged packets */
1729         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1730         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1731                                      port->logical_port_id,
1732                                      reg_type, port->mac_addr, 0, hcallid);
1733         if (hret != H_SUCCESS) {
1734                 ehea_error("%sregistering bc address failed (tagged)",
1735                            hcallid == H_REG_BCMC ? "" : "de");
1736                 ret = -EIO;
1737                 goto out_herr;
1738         }
1739
1740         /* De/Register VLAN packets */
1741         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1742         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1743                                      port->logical_port_id,
1744                                      reg_type, port->mac_addr, 0, hcallid);
1745         if (hret != H_SUCCESS) {
1746                 ehea_error("%sregistering bc address failed (vlan)",
1747                            hcallid == H_REG_BCMC ? "" : "de");
1748                 ret = -EIO;
1749         }
1750 out_herr:
1751         return ret;
1752 }
1753
1754 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1755 {
1756         struct ehea_port *port = netdev_priv(dev);
1757         struct sockaddr *mac_addr = sa;
1758         struct hcp_ehea_port_cb0 *cb0;
1759         int ret;
1760         u64 hret;
1761
1762         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1763                 ret = -EADDRNOTAVAIL;
1764                 goto out;
1765         }
1766
1767         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1768         if (!cb0) {
1769                 ehea_error("no mem for cb0");
1770                 ret = -ENOMEM;
1771                 goto out;
1772         }
1773
1774         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1775
1776         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1777
1778         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1779                                        port->logical_port_id, H_PORT_CB0,
1780                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1781         if (hret != H_SUCCESS) {
1782                 ret = -EIO;
1783                 goto out_free;
1784         }
1785
1786         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1787
1788         /* Deregister old MAC in pHYP */
1789         if (port->state == EHEA_PORT_UP) {
1790                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1791                 if (ret)
1792                         goto out_upregs;
1793         }
1794
1795         port->mac_addr = cb0->port_mac_addr << 16;
1796
1797         /* Register new MAC in pHYP */
1798         if (port->state == EHEA_PORT_UP) {
1799                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1800                 if (ret)
1801                         goto out_upregs;
1802         }
1803
1804         ret = 0;
1805
1806 out_upregs:
1807         ehea_update_bcmc_registrations();
1808 out_free:
1809         free_page((unsigned long)cb0);
1810 out:
1811         return ret;
1812 }
1813
1814 static void ehea_promiscuous_error(u64 hret, int enable)
1815 {
1816         if (hret == H_AUTHORITY)
1817                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1818                           enable == 1 ? "en" : "dis");
1819         else
1820                 ehea_error("failed %sabling promiscuous mode",
1821                            enable == 1 ? "en" : "dis");
1822 }
1823
1824 static void ehea_promiscuous(struct net_device *dev, int enable)
1825 {
1826         struct ehea_port *port = netdev_priv(dev);
1827         struct hcp_ehea_port_cb7 *cb7;
1828         u64 hret;
1829
1830         if ((enable && port->promisc) || (!enable && !port->promisc))
1831                 return;
1832
1833         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1834         if (!cb7) {
1835                 ehea_error("no mem for cb7");
1836                 goto out;
1837         }
1838
1839         /* Modify Pxs_DUCQPN in CB7 */
1840         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1841
1842         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1843                                        port->logical_port_id,
1844                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1845         if (hret) {
1846                 ehea_promiscuous_error(hret, enable);
1847                 goto out;
1848         }
1849
1850         port->promisc = enable;
1851 out:
1852         free_page((unsigned long)cb7);
1853         return;
1854 }
1855
1856 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1857                                      u32 hcallid)
1858 {
1859         u64 hret;
1860         u8 reg_type;
1861
1862         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1863                  | EHEA_BCMC_UNTAGGED;
1864
1865         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1866                                      port->logical_port_id,
1867                                      reg_type, mc_mac_addr, 0, hcallid);
1868         if (hret)
1869                 goto out;
1870
1871         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1872                  | EHEA_BCMC_VLANID_ALL;
1873
1874         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1875                                      port->logical_port_id,
1876                                      reg_type, mc_mac_addr, 0, hcallid);
1877 out:
1878         return hret;
1879 }
1880
1881 static int ehea_drop_multicast_list(struct net_device *dev)
1882 {
1883         struct ehea_port *port = netdev_priv(dev);
1884         struct ehea_mc_list *mc_entry = port->mc_list;
1885         struct list_head *pos;
1886         struct list_head *temp;
1887         int ret = 0;
1888         u64 hret;
1889
1890         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1891                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1892
1893                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1894                                                  H_DEREG_BCMC);
1895                 if (hret) {
1896                         ehea_error("failed deregistering mcast MAC");
1897                         ret = -EIO;
1898                 }
1899
1900                 list_del(pos);
1901                 kfree(mc_entry);
1902         }
1903         return ret;
1904 }
1905
1906 static void ehea_allmulti(struct net_device *dev, int enable)
1907 {
1908         struct ehea_port *port = netdev_priv(dev);
1909         u64 hret;
1910
1911         if (!port->allmulti) {
1912                 if (enable) {
1913                         /* Enable ALLMULTI */
1914                         ehea_drop_multicast_list(dev);
1915                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1916                         if (!hret)
1917                                 port->allmulti = 1;
1918                         else
1919                                 ehea_error("failed enabling IFF_ALLMULTI");
1920                 }
1921         } else
1922                 if (!enable) {
1923                         /* Disable ALLMULTI */
1924                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1925                         if (!hret)
1926                                 port->allmulti = 0;
1927                         else
1928                                 ehea_error("failed disabling IFF_ALLMULTI");
1929                 }
1930 }
1931
1932 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1933 {
1934         struct ehea_mc_list *ehea_mcl_entry;
1935         u64 hret;
1936
1937         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1938         if (!ehea_mcl_entry) {
1939                 ehea_error("no mem for mcl_entry");
1940                 return;
1941         }
1942
1943         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1944
1945         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1946
1947         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1948                                          H_REG_BCMC);
1949         if (!hret)
1950                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1951         else {
1952                 ehea_error("failed registering mcast MAC");
1953                 kfree(ehea_mcl_entry);
1954         }
1955 }
1956
1957 static void ehea_set_multicast_list(struct net_device *dev)
1958 {
1959         struct ehea_port *port = netdev_priv(dev);
1960         struct dev_mc_list *k_mcl_entry;
1961         int ret, i;
1962
1963         if (dev->flags & IFF_PROMISC) {
1964                 ehea_promiscuous(dev, 1);
1965                 return;
1966         }
1967         ehea_promiscuous(dev, 0);
1968
1969         if (dev->flags & IFF_ALLMULTI) {
1970                 ehea_allmulti(dev, 1);
1971                 goto out;
1972         }
1973         ehea_allmulti(dev, 0);
1974
1975         if (dev->mc_count) {
1976                 ret = ehea_drop_multicast_list(dev);
1977                 if (ret) {
1978                         /* Dropping the current multicast list failed.
1979                          * Enabling ALL_MULTI is the best we can do.
1980                          */
1981                         ehea_allmulti(dev, 1);
1982                 }
1983
1984                 if (dev->mc_count > port->adapter->max_mc_mac) {
1985                         ehea_info("Mcast registration limit reached (0x%llx). "
1986                                   "Use ALLMULTI!",
1987                                   port->adapter->max_mc_mac);
1988                         goto out;
1989                 }
1990
1991                 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
1992                              k_mcl_entry = k_mcl_entry->next)
1993                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1994
1995         }
1996 out:
1997         ehea_update_bcmc_registrations();
1998         return;
1999 }
2000
2001 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2002 {
2003         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2004                 return -EINVAL;
2005         dev->mtu = new_mtu;
2006         return 0;
2007 }
2008
2009 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2010                        struct ehea_swqe *swqe, u32 lkey)
2011 {
2012         if (skb->protocol == htons(ETH_P_IP)) {
2013                 const struct iphdr *iph = ip_hdr(skb);
2014
2015                 /* IPv4 */
2016                 swqe->tx_control |= EHEA_SWQE_CRC
2017                                  | EHEA_SWQE_IP_CHECKSUM
2018                                  | EHEA_SWQE_TCP_CHECKSUM
2019                                  | EHEA_SWQE_IMM_DATA_PRESENT
2020                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2021
2022                 write_ip_start_end(swqe, skb);
2023
2024                 if (iph->protocol == IPPROTO_UDP) {
2025                         if ((iph->frag_off & IP_MF)
2026                             || (iph->frag_off & IP_OFFSET))
2027                                 /* IP fragment, so don't change cs */
2028                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2029                         else
2030                                 write_udp_offset_end(swqe, skb);
2031                 } else if (iph->protocol == IPPROTO_TCP) {
2032                         write_tcp_offset_end(swqe, skb);
2033                 }
2034
2035                 /* icmp (big data) and ip segmentation packets (all other ip
2036                    packets) do not require any special handling */
2037
2038         } else {
2039                 /* Other Ethernet Protocol */
2040                 swqe->tx_control |= EHEA_SWQE_CRC
2041                                  | EHEA_SWQE_IMM_DATA_PRESENT
2042                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2043         }
2044
2045         write_swqe2_data(skb, dev, swqe, lkey);
2046 }
2047
2048 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2049                        struct ehea_swqe *swqe)
2050 {
2051         int nfrags = skb_shinfo(skb)->nr_frags;
2052         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2053         skb_frag_t *frag;
2054         int i;
2055
2056         if (skb->protocol == htons(ETH_P_IP)) {
2057                 const struct iphdr *iph = ip_hdr(skb);
2058
2059                 /* IPv4 */
2060                 write_ip_start_end(swqe, skb);
2061
2062                 if (iph->protocol == IPPROTO_TCP) {
2063                         swqe->tx_control |= EHEA_SWQE_CRC
2064                                          | EHEA_SWQE_IP_CHECKSUM
2065                                          | EHEA_SWQE_TCP_CHECKSUM
2066                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2067
2068                         write_tcp_offset_end(swqe, skb);
2069
2070                 } else if (iph->protocol == IPPROTO_UDP) {
2071                         if ((iph->frag_off & IP_MF)
2072                             || (iph->frag_off & IP_OFFSET))
2073                                 /* IP fragment, so don't change cs */
2074                                 swqe->tx_control |= EHEA_SWQE_CRC
2075                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2076                         else {
2077                                 swqe->tx_control |= EHEA_SWQE_CRC
2078                                                  | EHEA_SWQE_IP_CHECKSUM
2079                                                  | EHEA_SWQE_TCP_CHECKSUM
2080                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2081
2082                                 write_udp_offset_end(swqe, skb);
2083                         }
2084                 } else {
2085                         /* icmp (big data) and
2086                            ip segmentation packets (all other ip packets) */
2087                         swqe->tx_control |= EHEA_SWQE_CRC
2088                                          | EHEA_SWQE_IP_CHECKSUM
2089                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2090                 }
2091         } else {
2092                 /* Other Ethernet Protocol */
2093                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2094         }
2095         /* copy (immediate) data */
2096         if (nfrags == 0) {
2097                 /* data is in a single piece */
2098                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2099         } else {
2100                 /* first copy data from the skb->data buffer ... */
2101                 skb_copy_from_linear_data(skb, imm_data,
2102                                           skb->len - skb->data_len);
2103                 imm_data += skb->len - skb->data_len;
2104
2105                 /* ... then copy data from the fragments */
2106                 for (i = 0; i < nfrags; i++) {
2107                         frag = &skb_shinfo(skb)->frags[i];
2108                         memcpy(imm_data,
2109                                page_address(frag->page) + frag->page_offset,
2110                                frag->size);
2111                         imm_data += frag->size;
2112                 }
2113         }
2114         swqe->immediate_data_length = skb->len;
2115         dev_kfree_skb(skb);
2116 }
2117
2118 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2119 {
2120         struct tcphdr *tcp;
2121         u32 tmp;
2122
2123         if ((skb->protocol == htons(ETH_P_IP)) &&
2124             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2125                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2126                                         (ip_hdr(skb)->ihl * 4));
2127                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2128                 tmp += ip_hdr(skb)->daddr % 31;
2129                 return tmp % num_qps;
2130         } else
2131                 return 0;
2132 }
2133
2134 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2135 {
2136         struct ehea_port *port = netdev_priv(dev);
2137         struct ehea_swqe *swqe;
2138         unsigned long flags;
2139         u32 lkey;
2140         int swqe_index;
2141         struct ehea_port_res *pr;
2142
2143         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2144
2145         if (!spin_trylock(&pr->xmit_lock))
2146                 return NETDEV_TX_BUSY;
2147
2148         if (pr->queue_stopped) {
2149                 spin_unlock(&pr->xmit_lock);
2150                 return NETDEV_TX_BUSY;
2151         }
2152
2153         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2154         memset(swqe, 0, SWQE_HEADER_SIZE);
2155         atomic_dec(&pr->swqe_avail);
2156
2157         if (skb->len <= SWQE3_MAX_IMM) {
2158                 u32 sig_iv = port->sig_comp_iv;
2159                 u32 swqe_num = pr->swqe_id_counter;
2160                 ehea_xmit3(skb, dev, swqe);
2161                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2162                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2163                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2164                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2165                                                       sig_iv);
2166                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2167                         pr->swqe_ll_count = 0;
2168                 } else
2169                         pr->swqe_ll_count += 1;
2170         } else {
2171                 swqe->wr_id =
2172                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2173                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2174                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2175                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2176                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2177
2178                 pr->sq_skba.index++;
2179                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2180
2181                 lkey = pr->send_mr.lkey;
2182                 ehea_xmit2(skb, dev, swqe, lkey);
2183                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2184         }
2185         pr->swqe_id_counter += 1;
2186
2187         if (port->vgrp && vlan_tx_tag_present(skb)) {
2188                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2189                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2190         }
2191
2192         if (netif_msg_tx_queued(port)) {
2193                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2194                 ehea_dump(swqe, 512, "swqe");
2195         }
2196
2197         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2198                 netif_stop_queue(dev);
2199                 swqe->tx_control |= EHEA_SWQE_PURGE;
2200         }
2201
2202         ehea_post_swqe(pr->qp, swqe);
2203         pr->tx_packets++;
2204
2205         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2206                 spin_lock_irqsave(&pr->netif_queue, flags);
2207                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2208                         pr->p_stats.queue_stopped++;
2209                         netif_stop_queue(dev);
2210                         pr->queue_stopped = 1;
2211                 }
2212                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2213         }
2214         dev->trans_start = jiffies;
2215         spin_unlock(&pr->xmit_lock);
2216
2217         return NETDEV_TX_OK;
2218 }
2219
2220 static void ehea_vlan_rx_register(struct net_device *dev,
2221                                   struct vlan_group *grp)
2222 {
2223         struct ehea_port *port = netdev_priv(dev);
2224         struct ehea_adapter *adapter = port->adapter;
2225         struct hcp_ehea_port_cb1 *cb1;
2226         u64 hret;
2227
2228         port->vgrp = grp;
2229
2230         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2231         if (!cb1) {
2232                 ehea_error("no mem for cb1");
2233                 goto out;
2234         }
2235
2236         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2237                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2238         if (hret != H_SUCCESS)
2239                 ehea_error("modify_ehea_port failed");
2240
2241         free_page((unsigned long)cb1);
2242 out:
2243         return;
2244 }
2245
2246 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2247 {
2248         struct ehea_port *port = netdev_priv(dev);
2249         struct ehea_adapter *adapter = port->adapter;
2250         struct hcp_ehea_port_cb1 *cb1;
2251         int index;
2252         u64 hret;
2253
2254         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2255         if (!cb1) {
2256                 ehea_error("no mem for cb1");
2257                 goto out;
2258         }
2259
2260         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2261                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2262         if (hret != H_SUCCESS) {
2263                 ehea_error("query_ehea_port failed");
2264                 goto out;
2265         }
2266
2267         index = (vid / 64);
2268         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2269
2270         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2271                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2272         if (hret != H_SUCCESS)
2273                 ehea_error("modify_ehea_port failed");
2274 out:
2275         free_page((unsigned long)cb1);
2276         return;
2277 }
2278
2279 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2280 {
2281         struct ehea_port *port = netdev_priv(dev);
2282         struct ehea_adapter *adapter = port->adapter;
2283         struct hcp_ehea_port_cb1 *cb1;
2284         int index;
2285         u64 hret;
2286
2287         vlan_group_set_device(port->vgrp, vid, NULL);
2288
2289         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2290         if (!cb1) {
2291                 ehea_error("no mem for cb1");
2292                 goto out;
2293         }
2294
2295         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2296                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2297         if (hret != H_SUCCESS) {
2298                 ehea_error("query_ehea_port failed");
2299                 goto out;
2300         }
2301
2302         index = (vid / 64);
2303         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2304
2305         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2306                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2307         if (hret != H_SUCCESS)
2308                 ehea_error("modify_ehea_port failed");
2309 out:
2310         free_page((unsigned long)cb1);
2311         return;
2312 }
2313
2314 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2315 {
2316         int ret = -EIO;
2317         u64 hret;
2318         u16 dummy16 = 0;
2319         u64 dummy64 = 0;
2320         struct hcp_modify_qp_cb0 *cb0;
2321
2322         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2323         if (!cb0) {
2324                 ret = -ENOMEM;
2325                 goto out;
2326         }
2327
2328         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2329                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2330         if (hret != H_SUCCESS) {
2331                 ehea_error("query_ehea_qp failed (1)");
2332                 goto out;
2333         }
2334
2335         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2336         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2337                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2338                                      &dummy64, &dummy64, &dummy16, &dummy16);
2339         if (hret != H_SUCCESS) {
2340                 ehea_error("modify_ehea_qp failed (1)");
2341                 goto out;
2342         }
2343
2344         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2345                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2346         if (hret != H_SUCCESS) {
2347                 ehea_error("query_ehea_qp failed (2)");
2348                 goto out;
2349         }
2350
2351         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2352         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2353                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2354                                      &dummy64, &dummy64, &dummy16, &dummy16);
2355         if (hret != H_SUCCESS) {
2356                 ehea_error("modify_ehea_qp failed (2)");
2357                 goto out;
2358         }
2359
2360         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2361                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2362         if (hret != H_SUCCESS) {
2363                 ehea_error("query_ehea_qp failed (3)");
2364                 goto out;
2365         }
2366
2367         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2368         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2369                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2370                                      &dummy64, &dummy64, &dummy16, &dummy16);
2371         if (hret != H_SUCCESS) {
2372                 ehea_error("modify_ehea_qp failed (3)");
2373                 goto out;
2374         }
2375
2376         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2377                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2378         if (hret != H_SUCCESS) {
2379                 ehea_error("query_ehea_qp failed (4)");
2380                 goto out;
2381         }
2382
2383         ret = 0;
2384 out:
2385         free_page((unsigned long)cb0);
2386         return ret;
2387 }
2388
2389 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2390                                int add_tx_qps)
2391 {
2392         int ret, i;
2393         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2394         enum ehea_eq_type eq_type = EHEA_EQ;
2395
2396         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2397                                    EHEA_MAX_ENTRIES_EQ, 1);
2398         if (!port->qp_eq) {
2399                 ret = -EINVAL;
2400                 ehea_error("ehea_create_eq failed (qp_eq)");
2401                 goto out_kill_eq;
2402         }
2403
2404         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2405         pr_cfg.max_entries_scq = sq_entries * 2;
2406         pr_cfg.max_entries_sq = sq_entries;
2407         pr_cfg.max_entries_rq1 = rq1_entries;
2408         pr_cfg.max_entries_rq2 = rq2_entries;
2409         pr_cfg.max_entries_rq3 = rq3_entries;
2410
2411         pr_cfg_small_rx.max_entries_rcq = 1;
2412         pr_cfg_small_rx.max_entries_scq = sq_entries;
2413         pr_cfg_small_rx.max_entries_sq = sq_entries;
2414         pr_cfg_small_rx.max_entries_rq1 = 1;
2415         pr_cfg_small_rx.max_entries_rq2 = 1;
2416         pr_cfg_small_rx.max_entries_rq3 = 1;
2417
2418         for (i = 0; i < def_qps; i++) {
2419                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2420                 if (ret)
2421                         goto out_clean_pr;
2422         }
2423         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2424                 ret = ehea_init_port_res(port, &port->port_res[i],
2425                                          &pr_cfg_small_rx, i);
2426                 if (ret)
2427                         goto out_clean_pr;
2428         }
2429
2430         return 0;
2431
2432 out_clean_pr:
2433         while (--i >= 0)
2434                 ehea_clean_portres(port, &port->port_res[i]);
2435
2436 out_kill_eq:
2437         ehea_destroy_eq(port->qp_eq);
2438         return ret;
2439 }
2440
2441 static int ehea_clean_all_portres(struct ehea_port *port)
2442 {
2443         int ret = 0;
2444         int i;
2445
2446         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2447                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2448
2449         ret |= ehea_destroy_eq(port->qp_eq);
2450
2451         return ret;
2452 }
2453
2454 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2455 {
2456         if (adapter->active_ports)
2457                 return;
2458
2459         ehea_rem_mr(&adapter->mr);
2460 }
2461
2462 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2463 {
2464         if (adapter->active_ports)
2465                 return 0;
2466
2467         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2468 }
2469
2470 static int ehea_up(struct net_device *dev)
2471 {
2472         int ret, i;
2473         struct ehea_port *port = netdev_priv(dev);
2474
2475         if (port->state == EHEA_PORT_UP)
2476                 return 0;
2477
2478         ret = ehea_port_res_setup(port, port->num_def_qps,
2479                                   port->num_add_tx_qps);
2480         if (ret) {
2481                 ehea_error("port_res_failed");
2482                 goto out;
2483         }
2484
2485         /* Set default QP for this port */
2486         ret = ehea_configure_port(port);
2487         if (ret) {
2488                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2489                 goto out_clean_pr;
2490         }
2491
2492         ret = ehea_reg_interrupts(dev);
2493         if (ret) {
2494                 ehea_error("reg_interrupts failed. ret:%d", ret);
2495                 goto out_clean_pr;
2496         }
2497
2498         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2499                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2500                 if (ret) {
2501                         ehea_error("activate_qp failed");
2502                         goto out_free_irqs;
2503                 }
2504         }
2505
2506         for (i = 0; i < port->num_def_qps; i++) {
2507                 ret = ehea_fill_port_res(&port->port_res[i]);
2508                 if (ret) {
2509                         ehea_error("out_free_irqs");
2510                         goto out_free_irqs;
2511                 }
2512         }
2513
2514         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2515         if (ret) {
2516                 ret = -EIO;
2517                 goto out_free_irqs;
2518         }
2519
2520         port->state = EHEA_PORT_UP;
2521
2522         ret = 0;
2523         goto out;
2524
2525 out_free_irqs:
2526         ehea_free_interrupts(dev);
2527
2528 out_clean_pr:
2529         ehea_clean_all_portres(port);
2530 out:
2531         if (ret)
2532                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2533
2534         ehea_update_bcmc_registrations();
2535         ehea_update_firmware_handles();
2536
2537         return ret;
2538 }
2539
2540 static void port_napi_disable(struct ehea_port *port)
2541 {
2542         int i;
2543
2544         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2545                 napi_disable(&port->port_res[i].napi);
2546 }
2547
2548 static void port_napi_enable(struct ehea_port *port)
2549 {
2550         int i;
2551
2552         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2553                 napi_enable(&port->port_res[i].napi);
2554 }
2555
2556 static int ehea_open(struct net_device *dev)
2557 {
2558         int ret;
2559         struct ehea_port *port = netdev_priv(dev);
2560
2561         mutex_lock(&port->port_lock);
2562
2563         if (netif_msg_ifup(port))
2564                 ehea_info("enabling port %s", dev->name);
2565
2566         ret = ehea_up(dev);
2567         if (!ret) {
2568                 port_napi_enable(port);
2569                 netif_start_queue(dev);
2570         }
2571
2572         mutex_unlock(&port->port_lock);
2573
2574         return ret;
2575 }
2576
2577 static int ehea_down(struct net_device *dev)
2578 {
2579         int ret;
2580         struct ehea_port *port = netdev_priv(dev);
2581
2582         if (port->state == EHEA_PORT_DOWN)
2583                 return 0;
2584
2585         ehea_drop_multicast_list(dev);
2586         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2587
2588         ehea_free_interrupts(dev);
2589
2590         port->state = EHEA_PORT_DOWN;
2591
2592         ehea_update_bcmc_registrations();
2593
2594         ret = ehea_clean_all_portres(port);
2595         if (ret)
2596                 ehea_info("Failed freeing resources for %s. ret=%i",
2597                           dev->name, ret);
2598
2599         ehea_update_firmware_handles();
2600
2601         return ret;
2602 }
2603
2604 static int ehea_stop(struct net_device *dev)
2605 {
2606         int ret;
2607         struct ehea_port *port = netdev_priv(dev);
2608
2609         if (netif_msg_ifdown(port))
2610                 ehea_info("disabling port %s", dev->name);
2611
2612         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2613         cancel_work_sync(&port->reset_task);
2614         mutex_lock(&port->port_lock);
2615         netif_stop_queue(dev);
2616         port_napi_disable(port);
2617         ret = ehea_down(dev);
2618         mutex_unlock(&port->port_lock);
2619         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2620         return ret;
2621 }
2622
2623 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2624 {
2625         struct ehea_qp qp = *orig_qp;
2626         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2627         struct ehea_swqe *swqe;
2628         int wqe_index;
2629         int i;
2630
2631         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2632                 swqe = ehea_get_swqe(&qp, &wqe_index);
2633                 swqe->tx_control |= EHEA_SWQE_PURGE;
2634         }
2635 }
2636
2637 static void ehea_flush_sq(struct ehea_port *port)
2638 {
2639         int i;
2640
2641         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2642                 struct ehea_port_res *pr = &port->port_res[i];
2643                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2644                 int k = 0;
2645                 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2646                         msleep(5);
2647                         if (++k == 20)
2648                                 break;
2649                 }
2650         }
2651 }
2652
2653 int ehea_stop_qps(struct net_device *dev)
2654 {
2655         struct ehea_port *port = netdev_priv(dev);
2656         struct ehea_adapter *adapter = port->adapter;
2657         struct hcp_modify_qp_cb0 *cb0;
2658         int ret = -EIO;
2659         int dret;
2660         int i;
2661         u64 hret;
2662         u64 dummy64 = 0;
2663         u16 dummy16 = 0;
2664
2665         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2666         if (!cb0) {
2667                 ret = -ENOMEM;
2668                 goto out;
2669         }
2670
2671         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2672                 struct ehea_port_res *pr =  &port->port_res[i];
2673                 struct ehea_qp *qp = pr->qp;
2674
2675                 /* Purge send queue */
2676                 ehea_purge_sq(qp);
2677
2678                 /* Disable queue pair */
2679                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2680                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2681                                             cb0);
2682                 if (hret != H_SUCCESS) {
2683                         ehea_error("query_ehea_qp failed (1)");
2684                         goto out;
2685                 }
2686
2687                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2688                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2689
2690                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2691                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2692                                                             1), cb0, &dummy64,
2693                                              &dummy64, &dummy16, &dummy16);
2694                 if (hret != H_SUCCESS) {
2695                         ehea_error("modify_ehea_qp failed (1)");
2696                         goto out;
2697                 }
2698
2699                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2700                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2701                                             cb0);
2702                 if (hret != H_SUCCESS) {
2703                         ehea_error("query_ehea_qp failed (2)");
2704                         goto out;
2705                 }
2706
2707                 /* deregister shared memory regions */
2708                 dret = ehea_rem_smrs(pr);
2709                 if (dret) {
2710                         ehea_error("unreg shared memory region failed");
2711                         goto out;
2712                 }
2713         }
2714
2715         ret = 0;
2716 out:
2717         free_page((unsigned long)cb0);
2718
2719         return ret;
2720 }
2721
2722 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2723 {
2724         struct ehea_qp qp = *orig_qp;
2725         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2726         struct ehea_rwqe *rwqe;
2727         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2728         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2729         struct sk_buff *skb;
2730         u32 lkey = pr->recv_mr.lkey;
2731
2732
2733         int i;
2734         int index;
2735
2736         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2737                 rwqe = ehea_get_next_rwqe(&qp, 2);
2738                 rwqe->sg_list[0].l_key = lkey;
2739                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2740                 skb = skba_rq2[index];
2741                 if (skb)
2742                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2743         }
2744
2745         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2746                 rwqe = ehea_get_next_rwqe(&qp, 3);
2747                 rwqe->sg_list[0].l_key = lkey;
2748                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2749                 skb = skba_rq3[index];
2750                 if (skb)
2751                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2752         }
2753 }
2754
2755 int ehea_restart_qps(struct net_device *dev)
2756 {
2757         struct ehea_port *port = netdev_priv(dev);
2758         struct ehea_adapter *adapter = port->adapter;
2759         int ret = 0;
2760         int i;
2761
2762         struct hcp_modify_qp_cb0 *cb0;
2763         u64 hret;
2764         u64 dummy64 = 0;
2765         u16 dummy16 = 0;
2766
2767         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2768         if (!cb0) {
2769                 ret = -ENOMEM;
2770                 goto out;
2771         }
2772
2773         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2774                 struct ehea_port_res *pr =  &port->port_res[i];
2775                 struct ehea_qp *qp = pr->qp;
2776
2777                 ret = ehea_gen_smrs(pr);
2778                 if (ret) {
2779                         ehea_error("creation of shared memory regions failed");
2780                         goto out;
2781                 }
2782
2783                 ehea_update_rqs(qp, pr);
2784
2785                 /* Enable queue pair */
2786                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2787                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2788                                             cb0);
2789                 if (hret != H_SUCCESS) {
2790                         ehea_error("query_ehea_qp failed (1)");
2791                         goto out;
2792                 }
2793
2794                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2795                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2796
2797                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2798                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2799                                                             1), cb0, &dummy64,
2800                                              &dummy64, &dummy16, &dummy16);
2801                 if (hret != H_SUCCESS) {
2802                         ehea_error("modify_ehea_qp failed (1)");
2803                         goto out;
2804                 }
2805
2806                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2807                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2808                                             cb0);
2809                 if (hret != H_SUCCESS) {
2810                         ehea_error("query_ehea_qp failed (2)");
2811                         goto out;
2812                 }
2813
2814                 /* refill entire queue */
2815                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2816                 ehea_refill_rq2(pr, 0);
2817                 ehea_refill_rq3(pr, 0);
2818         }
2819 out:
2820         free_page((unsigned long)cb0);
2821
2822         return ret;
2823 }
2824
2825 static void ehea_reset_port(struct work_struct *work)
2826 {
2827         int ret;
2828         struct ehea_port *port =
2829                 container_of(work, struct ehea_port, reset_task);
2830         struct net_device *dev = port->netdev;
2831
2832         port->resets++;
2833         mutex_lock(&port->port_lock);
2834         netif_stop_queue(dev);
2835
2836         port_napi_disable(port);
2837
2838         ehea_down(dev);
2839
2840         ret = ehea_up(dev);
2841         if (ret)
2842                 goto out;
2843
2844         ehea_set_multicast_list(dev);
2845
2846         if (netif_msg_timer(port))
2847                 ehea_info("Device %s resetted successfully", dev->name);
2848
2849         port_napi_enable(port);
2850
2851         netif_wake_queue(dev);
2852 out:
2853         mutex_unlock(&port->port_lock);
2854         return;
2855 }
2856
2857 static void ehea_rereg_mrs(struct work_struct *work)
2858 {
2859         int ret, i;
2860         struct ehea_adapter *adapter;
2861
2862         mutex_lock(&dlpar_mem_lock);
2863         ehea_info("LPAR memory changed - re-initializing driver");
2864
2865         list_for_each_entry(adapter, &adapter_list, list)
2866                 if (adapter->active_ports) {
2867                         /* Shutdown all ports */
2868                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2869                                 struct ehea_port *port = adapter->port[i];
2870                                 struct net_device *dev;
2871
2872                                 if (!port)
2873                                         continue;
2874
2875                                 dev = port->netdev;
2876
2877                                 if (dev->flags & IFF_UP) {
2878                                         mutex_lock(&port->port_lock);
2879                                         netif_stop_queue(dev);
2880                                         ehea_flush_sq(port);
2881                                         ret = ehea_stop_qps(dev);
2882                                         if (ret) {
2883                                                 mutex_unlock(&port->port_lock);
2884                                                 goto out;
2885                                         }
2886                                         port_napi_disable(port);
2887                                         mutex_unlock(&port->port_lock);
2888                                 }
2889                         }
2890
2891                         /* Unregister old memory region */
2892                         ret = ehea_rem_mr(&adapter->mr);
2893                         if (ret) {
2894                                 ehea_error("unregister MR failed - driver"
2895                                            " inoperable!");
2896                                 goto out;
2897                         }
2898                 }
2899
2900         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2901
2902         list_for_each_entry(adapter, &adapter_list, list)
2903                 if (adapter->active_ports) {
2904                         /* Register new memory region */
2905                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2906                         if (ret) {
2907                                 ehea_error("register MR failed - driver"
2908                                            " inoperable!");
2909                                 goto out;
2910                         }
2911
2912                         /* Restart all ports */
2913                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2914                                 struct ehea_port *port = adapter->port[i];
2915
2916                                 if (port) {
2917                                         struct net_device *dev = port->netdev;
2918
2919                                         if (dev->flags & IFF_UP) {
2920                                                 mutex_lock(&port->port_lock);
2921                                                 port_napi_enable(port);
2922                                                 ret = ehea_restart_qps(dev);
2923                                                 if (!ret)
2924                                                         netif_wake_queue(dev);
2925                                                 mutex_unlock(&port->port_lock);
2926                                         }
2927                                 }
2928                         }
2929                 }
2930         ehea_info("re-initializing driver complete");
2931 out:
2932         mutex_unlock(&dlpar_mem_lock);
2933         return;
2934 }
2935
2936 static void ehea_tx_watchdog(struct net_device *dev)
2937 {
2938         struct ehea_port *port = netdev_priv(dev);
2939
2940         if (netif_carrier_ok(dev) &&
2941             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2942                 ehea_schedule_port_reset(port);
2943 }
2944
2945 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2946 {
2947         struct hcp_query_ehea *cb;
2948         u64 hret;
2949         int ret;
2950
2951         cb = (void *)get_zeroed_page(GFP_KERNEL);
2952         if (!cb) {
2953                 ret = -ENOMEM;
2954                 goto out;
2955         }
2956
2957         hret = ehea_h_query_ehea(adapter->handle, cb);
2958
2959         if (hret != H_SUCCESS) {
2960                 ret = -EIO;
2961                 goto out_herr;
2962         }
2963
2964         adapter->max_mc_mac = cb->max_mc_mac - 1;
2965         ret = 0;
2966
2967 out_herr:
2968         free_page((unsigned long)cb);
2969 out:
2970         return ret;
2971 }
2972
2973 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2974 {
2975         struct hcp_ehea_port_cb4 *cb4;
2976         u64 hret;
2977         int ret = 0;
2978
2979         *jumbo = 0;
2980
2981         /* (Try to) enable *jumbo frames */
2982         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2983         if (!cb4) {
2984                 ehea_error("no mem for cb4");
2985                 ret = -ENOMEM;
2986                 goto out;
2987         } else {
2988                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2989                                               port->logical_port_id,
2990                                               H_PORT_CB4,
2991                                               H_PORT_CB4_JUMBO, cb4);
2992                 if (hret == H_SUCCESS) {
2993                         if (cb4->jumbo_frame)
2994                                 *jumbo = 1;
2995                         else {
2996                                 cb4->jumbo_frame = 1;
2997                                 hret = ehea_h_modify_ehea_port(port->adapter->
2998                                                                handle,
2999                                                                port->
3000                                                                logical_port_id,
3001                                                                H_PORT_CB4,
3002                                                                H_PORT_CB4_JUMBO,
3003                                                                cb4);
3004                                 if (hret == H_SUCCESS)
3005                                         *jumbo = 1;
3006                         }
3007                 } else
3008                         ret = -EINVAL;
3009
3010                 free_page((unsigned long)cb4);
3011         }
3012 out:
3013         return ret;
3014 }
3015
3016 static ssize_t ehea_show_port_id(struct device *dev,
3017                                  struct device_attribute *attr, char *buf)
3018 {
3019         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3020         return sprintf(buf, "%d", port->logical_port_id);
3021 }
3022
3023 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3024                    NULL);
3025
3026 static void __devinit logical_port_release(struct device *dev)
3027 {
3028         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3029         of_node_put(port->ofdev.node);
3030 }
3031
3032 static struct device *ehea_register_port(struct ehea_port *port,
3033                                          struct device_node *dn)
3034 {
3035         int ret;
3036
3037         port->ofdev.node = of_node_get(dn);
3038         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3039         port->ofdev.dev.bus = &ibmebus_bus_type;
3040
3041         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3042         port->ofdev.dev.release = logical_port_release;
3043
3044         ret = of_device_register(&port->ofdev);
3045         if (ret) {
3046                 ehea_error("failed to register device. ret=%d", ret);
3047                 goto out;
3048         }
3049
3050         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3051         if (ret) {
3052                 ehea_error("failed to register attributes, ret=%d", ret);
3053                 goto out_unreg_of_dev;
3054         }
3055
3056         return &port->ofdev.dev;
3057
3058 out_unreg_of_dev:
3059         of_device_unregister(&port->ofdev);
3060 out:
3061         return NULL;
3062 }
3063
3064 static void ehea_unregister_port(struct ehea_port *port)
3065 {
3066         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3067         of_device_unregister(&port->ofdev);
3068 }
3069
3070 static const struct net_device_ops ehea_netdev_ops = {
3071         .ndo_open               = ehea_open,
3072         .ndo_stop               = ehea_stop,
3073         .ndo_start_xmit         = ehea_start_xmit,
3074 #ifdef CONFIG_NET_POLL_CONTROLLER
3075         .ndo_poll_controller    = ehea_netpoll,
3076 #endif
3077         .ndo_get_stats          = ehea_get_stats,
3078         .ndo_set_mac_address    = ehea_set_mac_addr,
3079         .ndo_set_multicast_list = ehea_set_multicast_list,
3080         .ndo_change_mtu         = ehea_change_mtu,
3081         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3082         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3083         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3084         .ndo_tx_timeout         = ehea_tx_watchdog,
3085 };
3086
3087 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3088                                          u32 logical_port_id,
3089                                          struct device_node *dn)
3090 {
3091         int ret;
3092         struct net_device *dev;
3093         struct ehea_port *port;
3094         struct device *port_dev;
3095         int jumbo;
3096
3097         /* allocate memory for the port structures */
3098         dev = alloc_etherdev(sizeof(struct ehea_port));
3099
3100         if (!dev) {
3101                 ehea_error("no mem for net_device");
3102                 ret = -ENOMEM;
3103                 goto out_err;
3104         }
3105
3106         port = netdev_priv(dev);
3107
3108         mutex_init(&port->port_lock);
3109         port->state = EHEA_PORT_DOWN;
3110         port->sig_comp_iv = sq_entries / 10;
3111
3112         port->adapter = adapter;
3113         port->netdev = dev;
3114         port->logical_port_id = logical_port_id;
3115
3116         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3117
3118         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3119         if (!port->mc_list) {
3120                 ret = -ENOMEM;
3121                 goto out_free_ethdev;
3122         }
3123
3124         INIT_LIST_HEAD(&port->mc_list->list);
3125
3126         ret = ehea_sense_port_attr(port);
3127         if (ret)
3128                 goto out_free_mc_list;
3129
3130         port_dev = ehea_register_port(port, dn);
3131         if (!port_dev)
3132                 goto out_free_mc_list;
3133
3134         SET_NETDEV_DEV(dev, port_dev);
3135
3136         /* initialize net_device structure */
3137         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3138
3139         dev->netdev_ops = &ehea_netdev_ops;
3140         ehea_set_ethtool_ops(dev);
3141
3142         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3143                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3144                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3145                       | NETIF_F_LLTX;
3146         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3147
3148         INIT_WORK(&port->reset_task, ehea_reset_port);
3149
3150         ret = register_netdev(dev);
3151         if (ret) {
3152                 ehea_error("register_netdev failed. ret=%d", ret);
3153                 goto out_unreg_port;
3154         }
3155
3156         port->lro_max_aggr = lro_max_aggr;
3157
3158         ret = ehea_get_jumboframe_status(port, &jumbo);
3159         if (ret)
3160                 ehea_error("failed determining jumbo frame status for %s",
3161                            port->netdev->name);
3162
3163         ehea_info("%s: Jumbo frames are %sabled", dev->name,
3164                   jumbo == 1 ? "en" : "dis");
3165
3166         adapter->active_ports++;
3167
3168         return port;
3169
3170 out_unreg_port:
3171         ehea_unregister_port(port);
3172
3173 out_free_mc_list:
3174         kfree(port->mc_list);
3175
3176 out_free_ethdev:
3177         free_netdev(dev);
3178
3179 out_err:
3180         ehea_error("setting up logical port with id=%d failed, ret=%d",
3181                    logical_port_id, ret);
3182         return NULL;
3183 }
3184
3185 static void ehea_shutdown_single_port(struct ehea_port *port)
3186 {
3187         struct ehea_adapter *adapter = port->adapter;
3188         unregister_netdev(port->netdev);
3189         ehea_unregister_port(port);
3190         kfree(port->mc_list);
3191         free_netdev(port->netdev);
3192         adapter->active_ports--;
3193 }
3194
3195 static int ehea_setup_ports(struct ehea_adapter *adapter)
3196 {
3197         struct device_node *lhea_dn;
3198         struct device_node *eth_dn = NULL;
3199
3200         const u32 *dn_log_port_id;
3201         int i = 0;
3202
3203         lhea_dn = adapter->ofdev->node;
3204         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3205
3206                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3207                                                  NULL);
3208                 if (!dn_log_port_id) {
3209                         ehea_error("bad device node: eth_dn name=%s",
3210                                    eth_dn->full_name);
3211                         continue;
3212                 }
3213
3214                 if (ehea_add_adapter_mr(adapter)) {
3215                         ehea_error("creating MR failed");
3216                         of_node_put(eth_dn);
3217                         return -EIO;
3218                 }
3219
3220                 adapter->port[i] = ehea_setup_single_port(adapter,
3221                                                           *dn_log_port_id,
3222                                                           eth_dn);
3223                 if (adapter->port[i])
3224                         ehea_info("%s -> logical port id #%d",
3225                                   adapter->port[i]->netdev->name,
3226                                   *dn_log_port_id);
3227                 else
3228                         ehea_remove_adapter_mr(adapter);
3229
3230                 i++;
3231         };
3232         return 0;
3233 }
3234
3235 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3236                                            u32 logical_port_id)
3237 {
3238         struct device_node *lhea_dn;
3239         struct device_node *eth_dn = NULL;
3240         const u32 *dn_log_port_id;
3241
3242         lhea_dn = adapter->ofdev->node;
3243         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3244
3245                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3246                                                  NULL);
3247                 if (dn_log_port_id)
3248                         if (*dn_log_port_id == logical_port_id)
3249                                 return eth_dn;
3250         };
3251
3252         return NULL;
3253 }
3254
3255 static ssize_t ehea_probe_port(struct device *dev,
3256                                struct device_attribute *attr,
3257                                const char *buf, size_t count)
3258 {
3259         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3260         struct ehea_port *port;
3261         struct device_node *eth_dn = NULL;
3262         int i;
3263
3264         u32 logical_port_id;
3265
3266         sscanf(buf, "%d", &logical_port_id);
3267
3268         port = ehea_get_port(adapter, logical_port_id);
3269
3270         if (port) {
3271                 ehea_info("adding port with logical port id=%d failed. port "
3272                           "already configured as %s.", logical_port_id,
3273                           port->netdev->name);
3274                 return -EINVAL;
3275         }
3276
3277         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3278
3279         if (!eth_dn) {
3280                 ehea_info("no logical port with id %d found", logical_port_id);
3281                 return -EINVAL;
3282         }
3283
3284         if (ehea_add_adapter_mr(adapter)) {
3285                 ehea_error("creating MR failed");
3286                 return -EIO;
3287         }
3288
3289         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3290
3291         of_node_put(eth_dn);
3292
3293         if (port) {
3294                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3295                         if (!adapter->port[i]) {
3296                                 adapter->port[i] = port;
3297                                 break;
3298                         }
3299
3300                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3301                           logical_port_id);
3302         } else {
3303                 ehea_remove_adapter_mr(adapter);
3304                 return -EIO;
3305         }
3306
3307         return (ssize_t) count;
3308 }
3309
3310 static ssize_t ehea_remove_port(struct device *dev,
3311                                 struct device_attribute *attr,
3312                                 const char *buf, size_t count)
3313 {
3314         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3315         struct ehea_port *port;
3316         int i;
3317         u32 logical_port_id;
3318
3319         sscanf(buf, "%d", &logical_port_id);
3320
3321         port = ehea_get_port(adapter, logical_port_id);
3322
3323         if (port) {
3324                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3325                           logical_port_id);
3326
3327                 ehea_shutdown_single_port(port);
3328
3329                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3330                         if (adapter->port[i] == port) {
3331                                 adapter->port[i] = NULL;
3332                                 break;
3333                         }
3334         } else {
3335                 ehea_error("removing port with logical port id=%d failed. port "
3336                            "not configured.", logical_port_id);
3337                 return -EINVAL;
3338         }
3339
3340         ehea_remove_adapter_mr(adapter);
3341
3342         return (ssize_t) count;
3343 }
3344
3345 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3346 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3347
3348 int ehea_create_device_sysfs(struct of_device *dev)
3349 {
3350         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3351         if (ret)
3352                 goto out;
3353
3354         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3355 out:
3356         return ret;
3357 }
3358
3359 void ehea_remove_device_sysfs(struct of_device *dev)
3360 {
3361         device_remove_file(&dev->dev, &dev_attr_probe_port);
3362         device_remove_file(&dev->dev, &dev_attr_remove_port);
3363 }
3364
3365 static int __devinit ehea_probe_adapter(struct of_device *dev,
3366                                         const struct of_device_id *id)
3367 {
3368         struct ehea_adapter *adapter;
3369         const u64 *adapter_handle;
3370         int ret;
3371
3372         if (!dev || !dev->node) {
3373                 ehea_error("Invalid ibmebus device probed");
3374                 return -EINVAL;
3375         }
3376
3377         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3378         if (!adapter) {
3379                 ret = -ENOMEM;
3380                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3381                 goto out;
3382         }
3383
3384         list_add(&adapter->list, &adapter_list);
3385
3386         adapter->ofdev = dev;
3387
3388         adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3389                                          NULL);
3390         if (adapter_handle)
3391                 adapter->handle = *adapter_handle;
3392
3393         if (!adapter->handle) {
3394                 dev_err(&dev->dev, "failed getting handle for adapter"
3395                         " '%s'\n", dev->node->full_name);
3396                 ret = -ENODEV;
3397                 goto out_free_ad;
3398         }
3399
3400         adapter->pd = EHEA_PD_ID;
3401
3402         dev_set_drvdata(&dev->dev, adapter);
3403
3404
3405         /* initialize adapter and ports */
3406         /* get adapter properties */
3407         ret = ehea_sense_adapter_attr(adapter);
3408         if (ret) {
3409                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3410                 goto out_free_ad;
3411         }
3412
3413         adapter->neq = ehea_create_eq(adapter,
3414                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3415         if (!adapter->neq) {
3416                 ret = -EIO;
3417                 dev_err(&dev->dev, "NEQ creation failed\n");
3418                 goto out_free_ad;
3419         }
3420
3421         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3422                      (unsigned long)adapter);
3423
3424         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3425                                   ehea_interrupt_neq, IRQF_DISABLED,
3426                                   "ehea_neq", adapter);
3427         if (ret) {
3428                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3429                 goto out_kill_eq;
3430         }
3431
3432         ret = ehea_create_device_sysfs(dev);
3433         if (ret)
3434                 goto out_free_irq;
3435
3436         ret = ehea_setup_ports(adapter);
3437         if (ret) {
3438                 dev_err(&dev->dev, "setup_ports failed\n");
3439                 goto out_rem_dev_sysfs;
3440         }
3441
3442         ret = 0;
3443         goto out;
3444
3445 out_rem_dev_sysfs:
3446         ehea_remove_device_sysfs(dev);
3447
3448 out_free_irq:
3449         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3450
3451 out_kill_eq:
3452         ehea_destroy_eq(adapter->neq);
3453
3454 out_free_ad:
3455         list_del(&adapter->list);
3456         kfree(adapter);
3457
3458 out:
3459         ehea_update_firmware_handles();
3460
3461         return ret;
3462 }
3463
3464 static int __devexit ehea_remove(struct of_device *dev)
3465 {
3466         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3467         int i;
3468
3469         for (i = 0; i < EHEA_MAX_PORTS; i++)
3470                 if (adapter->port[i]) {
3471                         ehea_shutdown_single_port(adapter->port[i]);
3472                         adapter->port[i] = NULL;
3473                 }
3474
3475         ehea_remove_device_sysfs(dev);
3476
3477         flush_scheduled_work();
3478
3479         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3480         tasklet_kill(&adapter->neq_tasklet);
3481
3482         ehea_destroy_eq(adapter->neq);
3483         ehea_remove_adapter_mr(adapter);
3484         list_del(&adapter->list);
3485         kfree(adapter);
3486
3487         ehea_update_firmware_handles();
3488
3489         return 0;
3490 }
3491
3492 void ehea_crash_handler(void)
3493 {
3494         int i;
3495
3496         if (ehea_fw_handles.arr)
3497                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3498                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3499                                              ehea_fw_handles.arr[i].fwh,
3500                                              FORCE_FREE);
3501
3502         if (ehea_bcmc_regs.arr)
3503                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3504                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3505                                               ehea_bcmc_regs.arr[i].port_id,
3506                                               ehea_bcmc_regs.arr[i].reg_type,
3507                                               ehea_bcmc_regs.arr[i].macaddr,
3508                                               0, H_DEREG_BCMC);
3509 }
3510
3511 static int ehea_mem_notifier(struct notifier_block *nb,
3512                              unsigned long action, void *data)
3513 {
3514         struct memory_notify *arg = data;
3515         switch (action) {
3516         case MEM_CANCEL_OFFLINE:
3517                 ehea_info("memory offlining canceled");
3518                 /* Readd canceled memory block */
3519         case MEM_ONLINE:
3520                 ehea_info("memory is going online");
3521                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3522                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3523                         return NOTIFY_BAD;
3524                 ehea_rereg_mrs(NULL);
3525                 break;
3526         case MEM_GOING_OFFLINE:
3527                 ehea_info("memory is going offline");
3528                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3529                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3530                         return NOTIFY_BAD;
3531                 ehea_rereg_mrs(NULL);
3532                 break;
3533         default:
3534                 break;
3535         }
3536
3537         ehea_update_firmware_handles();
3538
3539         return NOTIFY_OK;
3540 }
3541
3542 static struct notifier_block ehea_mem_nb = {
3543         .notifier_call = ehea_mem_notifier,
3544 };
3545
3546 static int ehea_reboot_notifier(struct notifier_block *nb,
3547                                 unsigned long action, void *unused)
3548 {
3549         if (action == SYS_RESTART) {
3550                 ehea_info("Reboot: freeing all eHEA resources");
3551                 ibmebus_unregister_driver(&ehea_driver);
3552         }
3553         return NOTIFY_DONE;
3554 }
3555
3556 static struct notifier_block ehea_reboot_nb = {
3557         .notifier_call = ehea_reboot_notifier,
3558 };
3559
3560 static int check_module_parm(void)
3561 {
3562         int ret = 0;
3563
3564         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3565             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3566                 ehea_info("Bad parameter: rq1_entries");
3567                 ret = -EINVAL;
3568         }
3569         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3570             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3571                 ehea_info("Bad parameter: rq2_entries");
3572                 ret = -EINVAL;
3573         }
3574         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3575             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3576                 ehea_info("Bad parameter: rq3_entries");
3577                 ret = -EINVAL;
3578         }
3579         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3580             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3581                 ehea_info("Bad parameter: sq_entries");
3582                 ret = -EINVAL;
3583         }
3584
3585         return ret;
3586 }
3587
3588 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3589                                       char *buf)
3590 {
3591         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3592 }
3593
3594 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3595                    ehea_show_capabilities, NULL);
3596
3597 int __init ehea_module_init(void)
3598 {
3599         int ret;
3600
3601         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3602                DRV_VERSION);
3603
3604
3605         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3606         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3607         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3608
3609         mutex_init(&ehea_fw_handles.lock);
3610         spin_lock_init(&ehea_bcmc_regs.lock);
3611
3612         ret = check_module_parm();
3613         if (ret)
3614                 goto out;
3615
3616         ret = ehea_create_busmap();
3617         if (ret)
3618                 goto out;
3619
3620         ret = register_reboot_notifier(&ehea_reboot_nb);
3621         if (ret)
3622                 ehea_info("failed registering reboot notifier");
3623
3624         ret = register_memory_notifier(&ehea_mem_nb);
3625         if (ret)
3626                 ehea_info("failed registering memory remove notifier");
3627
3628         ret = crash_shutdown_register(&ehea_crash_handler);
3629         if (ret)
3630                 ehea_info("failed registering crash handler");
3631
3632         ret = ibmebus_register_driver(&ehea_driver);
3633         if (ret) {
3634                 ehea_error("failed registering eHEA device driver on ebus");
3635                 goto out2;
3636         }
3637
3638         ret = driver_create_file(&ehea_driver.driver,
3639                                  &driver_attr_capabilities);
3640         if (ret) {
3641                 ehea_error("failed to register capabilities attribute, ret=%d",
3642                            ret);
3643                 goto out3;
3644         }
3645
3646         return ret;
3647
3648 out3:
3649         ibmebus_unregister_driver(&ehea_driver);
3650 out2:
3651         unregister_memory_notifier(&ehea_mem_nb);
3652         unregister_reboot_notifier(&ehea_reboot_nb);
3653         crash_shutdown_unregister(&ehea_crash_handler);
3654 out:
3655         return ret;
3656 }
3657
3658 static void __exit ehea_module_exit(void)
3659 {
3660         int ret;
3661
3662         flush_scheduled_work();
3663         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3664         ibmebus_unregister_driver(&ehea_driver);
3665         unregister_reboot_notifier(&ehea_reboot_nb);
3666         ret = crash_shutdown_unregister(&ehea_crash_handler);
3667         if (ret)
3668                 ehea_info("failed unregistering crash handler");
3669         unregister_memory_notifier(&ehea_mem_nb);
3670         kfree(ehea_fw_handles.arr);
3671         kfree(ehea_bcmc_regs.arr);
3672         ehea_destroy_busmap();
3673 }
3674
3675 module_init(ehea_module_init);
3676 module_exit(ehea_module_exit);