Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/net/ethernet/ibm/ehea/ehea_main.c

  1 /*
  2  *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
  3  *
  4  *  eHEA ethernet device driver for IBM eServer System p
  5  *
  6  *  (C) Copyright IBM Corp. 2006
  7  *
  8  *  Authors:
  9  *       Christoph Raisch <raisch@de.ibm.com>
 10  *       Jan-Bernd Themann <themann@de.ibm.com>
 11  *       Thomas Klein <tklein@de.ibm.com>
 12  *
 13  *
 14  * This program is free software; you can redistribute it and/or modify
 15  * it under the terms of the GNU General Public License as published by
 16  * the Free Software Foundation; either version 2, or (at your option)
 17  * any later version.
 18  *
 19  * This program is distributed in the hope that it will be useful,
 20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 22  * GNU General Public License for more details.
 23  *
 24  * You should have received a copy of the GNU General Public License
 25  * along with this program; if not, write to the Free Software
 26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 27  */
 28 
 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 30 
 31 #include <linux/device.h>
 32 #include <linux/in.h>
 33 #include <linux/ip.h>
 34 #include <linux/tcp.h>
 35 #include <linux/udp.h>
 36 #include <linux/if.h>
 37 #include <linux/list.h>
 38 #include <linux/slab.h>
 39 #include <linux/if_ether.h>
 40 #include <linux/notifier.h>
 41 #include <linux/reboot.h>
 42 #include <linux/memory.h>
 43 #include <asm/kexec.h>
 44 #include <linux/mutex.h>
 45 #include <linux/prefetch.h>
 46 
 47 #include <net/ip.h>
 48 
 49 #include "ehea.h"
 50 #include "ehea_qmr.h"
 51 #include "ehea_phyp.h"
 52 
 53 
 54 MODULE_LICENSE("GPL");
 55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
 56 MODULE_DESCRIPTION("IBM eServer HEA Driver");
 57 MODULE_VERSION(DRV_VERSION);
 58 
 59 
 60 static int msg_level = -1;
 61 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
 62 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
 63 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
 64 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
 65 static int use_mcs = 1;
 66 static int prop_carrier_state;
 67 
 68 module_param(msg_level, int, 0);
 69 module_param(rq1_entries, int, 0);
 70 module_param(rq2_entries, int, 0);
 71 module_param(rq3_entries, int, 0);
 72 module_param(sq_entries, int, 0);
 73 module_param(prop_carrier_state, int, 0);
 74 module_param(use_mcs, int, 0);
 75 
 76 MODULE_PARM_DESC(msg_level, "msg_level");
 77 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
 78                  "port to stack. 1:yes, 0:no.  Default = 0 ");
 79 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
 80                  "[2^x - 1], x = [7..14]. Default = "
 81                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
 82 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
 83                  "[2^x - 1], x = [7..14]. Default = "
 84                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
 85 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
 86                  "[2^x - 1], x = [7..14]. Default = "
 87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
 88 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
 89                  "[2^x - 1], x = [7..14]. Default = "
 90                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
 91 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
 92                  "Default = 1");
 93 
 94 static int port_name_cnt;
 95 static LIST_HEAD(adapter_list);
 96 static unsigned long ehea_driver_flags;
 97 static DEFINE_MUTEX(dlpar_mem_lock);
 98 static struct ehea_fw_handle_array ehea_fw_handles;
 99 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
100 
101 
102 static int ehea_probe_adapter(struct platform_device *dev);
103 
104 static int ehea_remove(struct platform_device *dev);
105 
106 static struct of_device_id ehea_module_device_table[] = {
107         {
108                 .name = "lhea",
109                 .compatible = "IBM,lhea",
110         },
111         {
112                 .type = "network",
113                 .compatible = "IBM,lhea-ethernet",
114         },
115         {},
116 };
117 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
118 
119 static struct of_device_id ehea_device_table[] = {
120         {
121                 .name = "lhea",
122                 .compatible = "IBM,lhea",
123         },
124         {},
125 };
126 
127 static struct platform_driver ehea_driver = {
128         .driver = {
129                 .name = "ehea",
130                 .owner = THIS_MODULE,
131                 .of_match_table = ehea_device_table,
132         },
133         .probe = ehea_probe_adapter,
134         .remove = ehea_remove,
135 };
136 
137 void ehea_dump(void *adr, int len, char *msg)
138 {
139         int x;
140         unsigned char *deb = adr;
141         for (x = 0; x < len; x += 16) {
142                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
143                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
144                 deb += 16;
145         }
146 }
147 
148 static void ehea_schedule_port_reset(struct ehea_port *port)
149 {
150         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
151                 schedule_work(&port->reset_task);
152 }
153 
154 static void ehea_update_firmware_handles(void)
155 {
156         struct ehea_fw_handle_entry *arr = NULL;
157         struct ehea_adapter *adapter;
158         int num_adapters = 0;
159         int num_ports = 0;
160         int num_portres = 0;
161         int i = 0;
162         int num_fw_handles, k, l;
163 
164         /* Determine number of handles */
165         mutex_lock(&ehea_fw_handles.lock);
166 
167         list_for_each_entry(adapter, &adapter_list, list) {
168                 num_adapters++;
169 
170                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
171                         struct ehea_port *port = adapter->port[k];
172 
173                         if (!port || (port->state != EHEA_PORT_UP))
174                                 continue;
175 
176                         num_ports++;
177                         num_portres += port->num_def_qps;
178                 }
179         }
180 
181         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
182                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
183                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
184 
185         if (num_fw_handles) {
186                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
187                 if (!arr)
188                         goto out;  /* Keep the existing array */
189         } else
190                 goto out_update;
191 
192         list_for_each_entry(adapter, &adapter_list, list) {
193                 if (num_adapters == 0)
194                         break;
195 
196                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
197                         struct ehea_port *port = adapter->port[k];
198 
199                         if (!port || (port->state != EHEA_PORT_UP) ||
200                             (num_ports == 0))
201                                 continue;
202 
203                         for (l = 0; l < port->num_def_qps; l++) {
204                                 struct ehea_port_res *pr = &port->port_res[l];
205 
206                                 arr[i].adh = adapter->handle;
207                                 arr[i++].fwh = pr->qp->fw_handle;
208                                 arr[i].adh = adapter->handle;
209                                 arr[i++].fwh = pr->send_cq->fw_handle;
210                                 arr[i].adh = adapter->handle;
211                                 arr[i++].fwh = pr->recv_cq->fw_handle;
212                                 arr[i].adh = adapter->handle;
213                                 arr[i++].fwh = pr->eq->fw_handle;
214                                 arr[i].adh = adapter->handle;
215                                 arr[i++].fwh = pr->send_mr.handle;
216                                 arr[i].adh = adapter->handle;
217                                 arr[i++].fwh = pr->recv_mr.handle;
218                         }
219                         arr[i].adh = adapter->handle;
220                         arr[i++].fwh = port->qp_eq->fw_handle;
221                         num_ports--;
222                 }
223 
224                 arr[i].adh = adapter->handle;
225                 arr[i++].fwh = adapter->neq->fw_handle;
226 
227                 if (adapter->mr.handle) {
228                         arr[i].adh = adapter->handle;
229                         arr[i++].fwh = adapter->mr.handle;
230                 }
231                 num_adapters--;
232         }
233 
234 out_update:
235         kfree(ehea_fw_handles.arr);
236         ehea_fw_handles.arr = arr;
237         ehea_fw_handles.num_entries = i;
238 out:
239         mutex_unlock(&ehea_fw_handles.lock);
240 }
241 
242 static void ehea_update_bcmc_registrations(void)
243 {
244         unsigned long flags;
245         struct ehea_bcmc_reg_entry *arr = NULL;
246         struct ehea_adapter *adapter;
247         struct ehea_mc_list *mc_entry;
248         int num_registrations = 0;
249         int i = 0;
250         int k;
251 
252         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
253 
254         /* Determine number of registrations */
255         list_for_each_entry(adapter, &adapter_list, list)
256                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
257                         struct ehea_port *port = adapter->port[k];
258 
259                         if (!port || (port->state != EHEA_PORT_UP))
260                                 continue;
261 
262                         num_registrations += 2; /* Broadcast registrations */
263 
264                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
265                                 num_registrations += 2;
266                 }
267 
268         if (num_registrations) {
269                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
270                 if (!arr)
271                         goto out;  /* Keep the existing array */
272         } else
273                 goto out_update;
274 
275         list_for_each_entry(adapter, &adapter_list, list) {
276                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
277                         struct ehea_port *port = adapter->port[k];
278 
279                         if (!port || (port->state != EHEA_PORT_UP))
280                                 continue;
281 
282                         if (num_registrations == 0)
283                                 goto out_update;
284 
285                         arr[i].adh = adapter->handle;
286                         arr[i].port_id = port->logical_port_id;
287                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
288                                           EHEA_BCMC_UNTAGGED;
289                         arr[i++].macaddr = port->mac_addr;
290 
291                         arr[i].adh = adapter->handle;
292                         arr[i].port_id = port->logical_port_id;
293                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
294                                           EHEA_BCMC_VLANID_ALL;
295                         arr[i++].macaddr = port->mac_addr;
296                         num_registrations -= 2;
297 
298                         list_for_each_entry(mc_entry,
299                                             &port->mc_list->list, list) {
300                                 if (num_registrations == 0)
301                                         goto out_update;
302 
303                                 arr[i].adh = adapter->handle;
304                                 arr[i].port_id = port->logical_port_id;
305                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
306                                                   EHEA_BCMC_UNTAGGED;
307                                 if (mc_entry->macaddr == 0)
308                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
309                                 arr[i++].macaddr = mc_entry->macaddr;
310 
311                                 arr[i].adh = adapter->handle;
312                                 arr[i].port_id = port->logical_port_id;
313                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
314                                                   EHEA_BCMC_VLANID_ALL;
315                                 if (mc_entry->macaddr == 0)
316                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
317                                 arr[i++].macaddr = mc_entry->macaddr;
318                                 num_registrations -= 2;
319                         }
320                 }
321         }
322 
323 out_update:
324         kfree(ehea_bcmc_regs.arr);
325         ehea_bcmc_regs.arr = arr;
326         ehea_bcmc_regs.num_entries = i;
327 out:
328         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
329 }
330 
331 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
332                                         struct rtnl_link_stats64 *stats)
333 {
334         struct ehea_port *port = netdev_priv(dev);
335         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
336         int i;
337 
338         for (i = 0; i < port->num_def_qps; i++) {
339                 rx_packets += port->port_res[i].rx_packets;
340                 rx_bytes   += port->port_res[i].rx_bytes;
341         }
342 
343         for (i = 0; i < port->num_def_qps; i++) {
344                 tx_packets += port->port_res[i].tx_packets;
345                 tx_bytes   += port->port_res[i].tx_bytes;
346         }
347 
348         stats->tx_packets = tx_packets;
349         stats->rx_bytes = rx_bytes;
350         stats->tx_bytes = tx_bytes;
351         stats->rx_packets = rx_packets;
352 
353         stats->multicast = port->stats.multicast;
354         stats->rx_errors = port->stats.rx_errors;
355         return stats;
356 }
357 
358 static void ehea_update_stats(struct work_struct *work)
359 {
360         struct ehea_port *port =
361                 container_of(work, struct ehea_port, stats_work.work);
362         struct net_device *dev = port->netdev;
363         struct rtnl_link_stats64 *stats = &port->stats;
364         struct hcp_ehea_port_cb2 *cb2;
365         u64 hret;
366 
367         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
368         if (!cb2) {
369                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
370                 goto resched;
371         }
372 
373         hret = ehea_h_query_ehea_port(port->adapter->handle,
374                                       port->logical_port_id,
375                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
376         if (hret != H_SUCCESS) {
377                 netdev_err(dev, "query_ehea_port failed\n");
378                 goto out_herr;
379         }
380 
381         if (netif_msg_hw(port))
382                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
383 
384         stats->multicast = cb2->rxmcp;
385         stats->rx_errors = cb2->rxuerr;
386 
387 out_herr:
388         free_page((unsigned long)cb2);
389 resched:
390         schedule_delayed_work(&port->stats_work,
391                               round_jiffies_relative(msecs_to_jiffies(1000)));
392 }
393 
394 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
395 {
396         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
397         struct net_device *dev = pr->port->netdev;
398         int max_index_mask = pr->rq1_skba.len - 1;
399         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
400         int adder = 0;
401         int i;
402 
403         pr->rq1_skba.os_skbs = 0;
404 
405         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
406                 if (nr_of_wqes > 0)
407                         pr->rq1_skba.index = index;
408                 pr->rq1_skba.os_skbs = fill_wqes;
409                 return;
410         }
411 
412         for (i = 0; i < fill_wqes; i++) {
413                 if (!skb_arr_rq1[index]) {
414                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
415                                                               EHEA_L_PKT_SIZE);
416                         if (!skb_arr_rq1[index]) {
417                                 pr->rq1_skba.os_skbs = fill_wqes - i;
418                                 break;
419                         }
420                 }
421                 index--;
422                 index &= max_index_mask;
423                 adder++;
424         }
425 
426         if (adder == 0)
427                 return;
428 
429         /* Ring doorbell */
430         ehea_update_rq1a(pr->qp, adder);
431 }
432 
433 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
434 {
435         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
436         struct net_device *dev = pr->port->netdev;
437         int i;
438 
439         if (nr_rq1a > pr->rq1_skba.len) {
440                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
441                 return;
442         }
443 
444         for (i = 0; i < nr_rq1a; i++) {
445                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
446                 if (!skb_arr_rq1[i])
447                         break;
448         }
449         /* Ring doorbell */
450         ehea_update_rq1a(pr->qp, i - 1);
451 }
452 
453 static int ehea_refill_rq_def(struct ehea_port_res *pr,
454                               struct ehea_q_skb_arr *q_skba, int rq_nr,
455                               int num_wqes, int wqe_type, int packet_size)
456 {
457         struct net_device *dev = pr->port->netdev;
458         struct ehea_qp *qp = pr->qp;
459         struct sk_buff **skb_arr = q_skba->arr;
460         struct ehea_rwqe *rwqe;
461         int i, index, max_index_mask, fill_wqes;
462         int adder = 0;
463         int ret = 0;
464 
465         fill_wqes = q_skba->os_skbs + num_wqes;
466         q_skba->os_skbs = 0;
467 
468         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
469                 q_skba->os_skbs = fill_wqes;
470                 return ret;
471         }
472 
473         index = q_skba->index;
474         max_index_mask = q_skba->len - 1;
475         for (i = 0; i < fill_wqes; i++) {
476                 u64 tmp_addr;
477                 struct sk_buff *skb;
478 
479                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
480                 if (!skb) {
481                         q_skba->os_skbs = fill_wqes - i;
482                         if (q_skba->os_skbs == q_skba->len - 2) {
483                                 netdev_info(pr->port->netdev,
484                                             "rq%i ran dry - no mem for skb\n",
485                                             rq_nr);
486                                 ret = -ENOMEM;
487                         }
488                         break;
489                 }
490 
491                 skb_arr[index] = skb;
492                 tmp_addr = ehea_map_vaddr(skb->data);
493                 if (tmp_addr == -1) {
494                         dev_consume_skb_any(skb);
495                         q_skba->os_skbs = fill_wqes - i;
496                         ret = 0;
497                         break;
498                 }
499 
500                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
501                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
502                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
503                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
504                 rwqe->sg_list[0].vaddr = tmp_addr;
505                 rwqe->sg_list[0].len = packet_size;
506                 rwqe->data_segments = 1;
507 
508                 index++;
509                 index &= max_index_mask;
510                 adder++;
511         }
512 
513         q_skba->index = index;
514         if (adder == 0)
515                 goto out;
516 
517         /* Ring doorbell */
518         iosync();
519         if (rq_nr == 2)
520                 ehea_update_rq2a(pr->qp, adder);
521         else
522                 ehea_update_rq3a(pr->qp, adder);
523 out:
524         return ret;
525 }
526 
527 
528 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
529 {
530         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
531                                   nr_of_wqes, EHEA_RWQE2_TYPE,
532                                   EHEA_RQ2_PKT_SIZE);
533 }
534 
535 
536 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
537 {
538         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
539                                   nr_of_wqes, EHEA_RWQE3_TYPE,
540                                   EHEA_MAX_PACKET_SIZE);
541 }
542 
543 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
544 {
545         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
546         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
547                 return 0;
548         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
549             (cqe->header_length == 0))
550                 return 0;
551         return -EINVAL;
552 }
553 
554 static inline void ehea_fill_skb(struct net_device *dev,
555                                  struct sk_buff *skb, struct ehea_cqe *cqe,
556                                  struct ehea_port_res *pr)
557 {
558         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
559 
560         skb_put(skb, length);
561         skb->protocol = eth_type_trans(skb, dev);
562 
563         /* The packet was not an IPV4 packet so a complemented checksum was
564            calculated. The value is found in the Internet Checksum field. */
565         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
566                 skb->ip_summed = CHECKSUM_COMPLETE;
567                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
568         } else
569                 skb->ip_summed = CHECKSUM_UNNECESSARY;
570 
571         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
572 }
573 
574 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
575                                                int arr_len,
576                                                struct ehea_cqe *cqe)
577 {
578         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
579         struct sk_buff *skb;
580         void *pref;
581         int x;
582 
583         x = skb_index + 1;
584         x &= (arr_len - 1);
585 
586         pref = skb_array[x];
587         if (pref) {
588                 prefetchw(pref);
589                 prefetchw(pref + EHEA_CACHE_LINE);
590 
591                 pref = (skb_array[x]->data);
592                 prefetch(pref);
593                 prefetch(pref + EHEA_CACHE_LINE);
594                 prefetch(pref + EHEA_CACHE_LINE * 2);
595                 prefetch(pref + EHEA_CACHE_LINE * 3);
596         }
597 
598         skb = skb_array[skb_index];
599         skb_array[skb_index] = NULL;
600         return skb;
601 }
602 
603 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
604                                                   int arr_len, int wqe_index)
605 {
606         struct sk_buff *skb;
607         void *pref;
608         int x;
609 
610         x = wqe_index + 1;
611         x &= (arr_len - 1);
612 
613         pref = skb_array[x];
614         if (pref) {
615                 prefetchw(pref);
616                 prefetchw(pref + EHEA_CACHE_LINE);
617 
618                 pref = (skb_array[x]->data);
619                 prefetchw(pref);
620                 prefetchw(pref + EHEA_CACHE_LINE);
621         }
622 
623         skb = skb_array[wqe_index];
624         skb_array[wqe_index] = NULL;
625         return skb;
626 }
627 
628 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
629                                  struct ehea_cqe *cqe, int *processed_rq2,
630                                  int *processed_rq3)
631 {
632         struct sk_buff *skb;
633 
634         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
635                 pr->p_stats.err_tcp_cksum++;
636         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
637                 pr->p_stats.err_ip_cksum++;
638         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
639                 pr->p_stats.err_frame_crc++;
640 
641         if (rq == 2) {
642                 *processed_rq2 += 1;
643                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
644                 dev_kfree_skb(skb);
645         } else if (rq == 3) {
646                 *processed_rq3 += 1;
647                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
648                 dev_kfree_skb(skb);
649         }
650 
651         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
652                 if (netif_msg_rx_err(pr->port)) {
653                         pr_err("Critical receive error for QP %d. Resetting port.\n",
654                                pr->qp->init_attr.qp_nr);
655                         ehea_dump(cqe, sizeof(*cqe), "CQE");
656                 }
657                 ehea_schedule_port_reset(pr->port);
658                 return 1;
659         }
660 
661         return 0;
662 }
663 
664 static int ehea_proc_rwqes(struct net_device *dev,
665                            struct ehea_port_res *pr,
666                            int budget)
667 {
668         struct ehea_port *port = pr->port;
669         struct ehea_qp *qp = pr->qp;
670         struct ehea_cqe *cqe;
671         struct sk_buff *skb;
672         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
673         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
674         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
675         int skb_arr_rq1_len = pr->rq1_skba.len;
676         int skb_arr_rq2_len = pr->rq2_skba.len;
677         int skb_arr_rq3_len = pr->rq3_skba.len;
678         int processed, processed_rq1, processed_rq2, processed_rq3;
679         u64 processed_bytes = 0;
680         int wqe_index, last_wqe_index, rq, port_reset;
681 
682         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
683         last_wqe_index = 0;
684 
685         cqe = ehea_poll_rq1(qp, &wqe_index);
686         while ((processed < budget) && cqe) {
687                 ehea_inc_rq1(qp);
688                 processed_rq1++;
689                 processed++;
690                 if (netif_msg_rx_status(port))
691                         ehea_dump(cqe, sizeof(*cqe), "CQE");
692 
693                 last_wqe_index = wqe_index;
694                 rmb();
695                 if (!ehea_check_cqe(cqe, &rq)) {
696                         if (rq == 1) {
697                                 /* LL RQ1 */
698                                 skb = get_skb_by_index_ll(skb_arr_rq1,
699                                                           skb_arr_rq1_len,
700                                                           wqe_index);
701                                 if (unlikely(!skb)) {
702                                         netif_info(port, rx_err, dev,
703                                                   "LL rq1: skb=NULL\n");
704 
705                                         skb = netdev_alloc_skb(dev,
706                                                                EHEA_L_PKT_SIZE);
707                                         if (!skb)
708                                                 break;
709                                 }
710                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
711                                                  cqe->num_bytes_transfered - 4);
712                                 ehea_fill_skb(dev, skb, cqe, pr);
713                         } else if (rq == 2) {
714                                 /* RQ2 */
715                                 skb = get_skb_by_index(skb_arr_rq2,
716                                                        skb_arr_rq2_len, cqe);
717                                 if (unlikely(!skb)) {
718                                         netif_err(port, rx_err, dev,
719                                                   "rq2: skb=NULL\n");
720                                         break;
721                                 }
722                                 ehea_fill_skb(dev, skb, cqe, pr);
723                                 processed_rq2++;
724                         } else {
725                                 /* RQ3 */
726                                 skb = get_skb_by_index(skb_arr_rq3,
727                                                        skb_arr_rq3_len, cqe);
728                                 if (unlikely(!skb)) {
729                                         netif_err(port, rx_err, dev,
730                                                   "rq3: skb=NULL\n");
731                                         break;
732                                 }
733                                 ehea_fill_skb(dev, skb, cqe, pr);
734                                 processed_rq3++;
735                         }
736 
737                         processed_bytes += skb->len;
738 
739                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
740                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
741                                                        cqe->vlan_tag);
742 
743                         napi_gro_receive(&pr->napi, skb);
744                 } else {
745                         pr->p_stats.poll_receive_errors++;
746                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
747                                                            &processed_rq2,
748                                                            &processed_rq3);
749                         if (port_reset)
750                                 break;
751                 }
752                 cqe = ehea_poll_rq1(qp, &wqe_index);
753         }
754 
755         pr->rx_packets += processed;
756         pr->rx_bytes += processed_bytes;
757 
758         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
759         ehea_refill_rq2(pr, processed_rq2);
760         ehea_refill_rq3(pr, processed_rq3);
761 
762         return processed;
763 }
764 
765 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
766 
767 static void reset_sq_restart_flag(struct ehea_port *port)
768 {
769         int i;
770 
771         for (i = 0; i < port->num_def_qps; i++) {
772                 struct ehea_port_res *pr = &port->port_res[i];
773                 pr->sq_restart_flag = 0;
774         }
775         wake_up(&port->restart_wq);
776 }
777 
778 static void check_sqs(struct ehea_port *port)
779 {
780         struct ehea_swqe *swqe;
781         int swqe_index;
782         int i, k;
783 
784         for (i = 0; i < port->num_def_qps; i++) {
785                 struct ehea_port_res *pr = &port->port_res[i];
786                 int ret;
787                 k = 0;
788                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
789                 memset(swqe, 0, SWQE_HEADER_SIZE);
790                 atomic_dec(&pr->swqe_avail);
791 
792                 swqe->tx_control |= EHEA_SWQE_PURGE;
793                 swqe->wr_id = SWQE_RESTART_CHECK;
794                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
795                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
796                 swqe->immediate_data_length = 80;
797 
798                 ehea_post_swqe(pr->qp, swqe);
799 
800                 ret = wait_event_timeout(port->restart_wq,
801                                          pr->sq_restart_flag == 0,
802                                          msecs_to_jiffies(100));
803 
804                 if (!ret) {
805                         pr_err("HW/SW queues out of sync\n");
806                         ehea_schedule_port_reset(pr->port);
807                         return;
808                 }
809         }
810 }
811 
812 
813 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
814 {
815         struct sk_buff *skb;
816         struct ehea_cq *send_cq = pr->send_cq;
817         struct ehea_cqe *cqe;
818         int quota = my_quota;
819         int cqe_counter = 0;
820         int swqe_av = 0;
821         int index;
822         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
823                                                 pr - &pr->port->port_res[0]);
824 
825         cqe = ehea_poll_cq(send_cq);
826         while (cqe && (quota > 0)) {
827                 ehea_inc_cq(send_cq);
828 
829                 cqe_counter++;
830                 rmb();
831 
832                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
833                         pr->sq_restart_flag = 1;
834                         swqe_av++;
835                         break;
836                 }
837 
838                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
839                         pr_err("Bad send completion status=0x%04X\n",
840                                cqe->status);
841 
842                         if (netif_msg_tx_err(pr->port))
843                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
844 
845                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
846                                 pr_err("Resetting port\n");
847                                 ehea_schedule_port_reset(pr->port);
848                                 break;
849                         }
850                 }
851 
852                 if (netif_msg_tx_done(pr->port))
853                         ehea_dump(cqe, sizeof(*cqe), "CQE");
854 
855                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
856                            == EHEA_SWQE2_TYPE)) {
857 
858                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
859                         skb = pr->sq_skba.arr[index];
860                         dev_consume_skb_any(skb);
861                         pr->sq_skba.arr[index] = NULL;
862                 }
863 
864                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
865                 quota--;
866 
867                 cqe = ehea_poll_cq(send_cq);
868         }
869 
870         ehea_update_feca(send_cq, cqe_counter);
871         atomic_add(swqe_av, &pr->swqe_avail);
872 
873         if (unlikely(netif_tx_queue_stopped(txq) &&
874                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
875                 __netif_tx_lock(txq, smp_processor_id());
876                 if (netif_tx_queue_stopped(txq) &&
877                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
878                         netif_tx_wake_queue(txq);
879                 __netif_tx_unlock(txq);
880         }
881 
882         wake_up(&pr->port->swqe_avail_wq);
883 
884         return cqe;
885 }
886 
887 #define EHEA_POLL_MAX_CQES 65535
888 
889 static int ehea_poll(struct napi_struct *napi, int budget)
890 {
891         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
892                                                 napi);
893         struct net_device *dev = pr->port->netdev;
894         struct ehea_cqe *cqe;
895         struct ehea_cqe *cqe_skb = NULL;
896         int wqe_index;
897         int rx = 0;
898 
899         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
900         rx += ehea_proc_rwqes(dev, pr, budget - rx);
901 
902         while (rx != budget) {
903                 napi_complete(napi);
904                 ehea_reset_cq_ep(pr->recv_cq);
905                 ehea_reset_cq_ep(pr->send_cq);
906                 ehea_reset_cq_n1(pr->recv_cq);
907                 ehea_reset_cq_n1(pr->send_cq);
908                 rmb();
909                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
910                 cqe_skb = ehea_poll_cq(pr->send_cq);
911 
912                 if (!cqe && !cqe_skb)
913                         return rx;
914 
915                 if (!napi_reschedule(napi))
916                         return rx;
917 
918                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
919                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
920         }
921 
922         return rx;
923 }
924 
925 #ifdef CONFIG_NET_POLL_CONTROLLER
926 static void ehea_netpoll(struct net_device *dev)
927 {
928         struct ehea_port *port = netdev_priv(dev);
929         int i;
930 
931         for (i = 0; i < port->num_def_qps; i++)
932                 napi_schedule(&port->port_res[i].napi);
933 }
934 #endif
935 
936 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
937 {
938         struct ehea_port_res *pr = param;
939 
940         napi_schedule(&pr->napi);
941 
942         return IRQ_HANDLED;
943 }
944 
945 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
946 {
947         struct ehea_port *port = param;
948         struct ehea_eqe *eqe;
949         struct ehea_qp *qp;
950         u32 qp_token;
951         u64 resource_type, aer, aerr;
952         int reset_port = 0;
953 
954         eqe = ehea_poll_eq(port->qp_eq);
955 
956         while (eqe) {
957                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
958                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
959                        eqe->entry, qp_token);
960 
961                 qp = port->port_res[qp_token].qp;
962 
963                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
964                                                 &aer, &aerr);
965 
966                 if (resource_type == EHEA_AER_RESTYPE_QP) {
967                         if ((aer & EHEA_AER_RESET_MASK) ||
968                             (aerr & EHEA_AERR_RESET_MASK))
969                                  reset_port = 1;
970                 } else
971                         reset_port = 1;   /* Reset in case of CQ or EQ error */
972 
973                 eqe = ehea_poll_eq(port->qp_eq);
974         }
975 
976         if (reset_port) {
977                 pr_err("Resetting port\n");
978                 ehea_schedule_port_reset(port);
979         }
980 
981         return IRQ_HANDLED;
982 }
983 
984 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
985                                        int logical_port)
986 {
987         int i;
988 
989         for (i = 0; i < EHEA_MAX_PORTS; i++)
990                 if (adapter->port[i])
991                         if (adapter->port[i]->logical_port_id == logical_port)
992                                 return adapter->port[i];
993         return NULL;
994 }
995 
996 int ehea_sense_port_attr(struct ehea_port *port)
997 {
998         int ret;
999         u64 hret;
1000         struct hcp_ehea_port_cb0 *cb0;
1001 
1002         /* may be called via ehea_neq_tasklet() */
1003         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1004         if (!cb0) {
1005                 pr_err("no mem for cb0\n");
1006                 ret = -ENOMEM;
1007                 goto out;
1008         }
1009 
1010         hret = ehea_h_query_ehea_port(port->adapter->handle,
1011                                       port->logical_port_id, H_PORT_CB0,
1012                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1013                                       cb0);
1014         if (hret != H_SUCCESS) {
1015                 ret = -EIO;
1016                 goto out_free;
1017         }
1018 
1019         /* MAC address */
1020         port->mac_addr = cb0->port_mac_addr << 16;
1021 
1022         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1023                 ret = -EADDRNOTAVAIL;
1024                 goto out_free;
1025         }
1026 
1027         /* Port speed */
1028         switch (cb0->port_speed) {
1029         case H_SPEED_10M_H:
1030                 port->port_speed = EHEA_SPEED_10M;
1031                 port->full_duplex = 0;
1032                 break;
1033         case H_SPEED_10M_F:
1034                 port->port_speed = EHEA_SPEED_10M;
1035                 port->full_duplex = 1;
1036                 break;
1037         case H_SPEED_100M_H:
1038                 port->port_speed = EHEA_SPEED_100M;
1039                 port->full_duplex = 0;
1040                 break;
1041         case H_SPEED_100M_F:
1042                 port->port_speed = EHEA_SPEED_100M;
1043                 port->full_duplex = 1;
1044                 break;
1045         case H_SPEED_1G_F:
1046                 port->port_speed = EHEA_SPEED_1G;
1047                 port->full_duplex = 1;
1048                 break;
1049         case H_SPEED_10G_F:
1050                 port->port_speed = EHEA_SPEED_10G;
1051                 port->full_duplex = 1;
1052                 break;
1053         default:
1054                 port->port_speed = 0;
1055                 port->full_duplex = 0;
1056                 break;
1057         }
1058 
1059         port->autoneg = 1;
1060         port->num_mcs = cb0->num_default_qps;
1061 
1062         /* Number of default QPs */
1063         if (use_mcs)
1064                 port->num_def_qps = cb0->num_default_qps;
1065         else
1066                 port->num_def_qps = 1;
1067 
1068         if (!port->num_def_qps) {
1069                 ret = -EINVAL;
1070                 goto out_free;
1071         }
1072 
1073         ret = 0;
1074 out_free:
1075         if (ret || netif_msg_probe(port))
1076                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1077         free_page((unsigned long)cb0);
1078 out:
1079         return ret;
1080 }
1081 
1082 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1083 {
1084         struct hcp_ehea_port_cb4 *cb4;
1085         u64 hret;
1086         int ret = 0;
1087 
1088         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1089         if (!cb4) {
1090                 pr_err("no mem for cb4\n");
1091                 ret = -ENOMEM;
1092                 goto out;
1093         }
1094 
1095         cb4->port_speed = port_speed;
1096 
1097         netif_carrier_off(port->netdev);
1098 
1099         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1100                                        port->logical_port_id,
1101                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1102         if (hret == H_SUCCESS) {
1103                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1104 
1105                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1106                                               port->logical_port_id,
1107                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1108                                               cb4);
1109                 if (hret == H_SUCCESS) {
1110                         switch (cb4->port_speed) {
1111                         case H_SPEED_10M_H:
1112                                 port->port_speed = EHEA_SPEED_10M;
1113                                 port->full_duplex = 0;
1114                                 break;
1115                         case H_SPEED_10M_F:
1116                                 port->port_speed = EHEA_SPEED_10M;
1117                                 port->full_duplex = 1;
1118                                 break;
1119                         case H_SPEED_100M_H:
1120                                 port->port_speed = EHEA_SPEED_100M;
1121                                 port->full_duplex = 0;
1122                                 break;
1123                         case H_SPEED_100M_F:
1124                                 port->port_speed = EHEA_SPEED_100M;
1125                                 port->full_duplex = 1;
1126                                 break;
1127                         case H_SPEED_1G_F:
1128                                 port->port_speed = EHEA_SPEED_1G;
1129                                 port->full_duplex = 1;
1130                                 break;
1131                         case H_SPEED_10G_F:
1132                                 port->port_speed = EHEA_SPEED_10G;
1133                                 port->full_duplex = 1;
1134                                 break;
1135                         default:
1136                                 port->port_speed = 0;
1137                                 port->full_duplex = 0;
1138                                 break;
1139                         }
1140                 } else {
1141                         pr_err("Failed sensing port speed\n");
1142                         ret = -EIO;
1143                 }
1144         } else {
1145                 if (hret == H_AUTHORITY) {
1146                         pr_info("Hypervisor denied setting port speed\n");
1147                         ret = -EPERM;
1148                 } else {
1149                         ret = -EIO;
1150                         pr_err("Failed setting port speed\n");
1151                 }
1152         }
1153         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1154                 netif_carrier_on(port->netdev);
1155 
1156         free_page((unsigned long)cb4);
1157 out:
1158         return ret;
1159 }
1160 
1161 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1162 {
1163         int ret;
1164         u8 ec;
1165         u8 portnum;
1166         struct ehea_port *port;
1167         struct net_device *dev;
1168 
1169         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1170         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1171         port = ehea_get_port(adapter, portnum);
1172         dev = port->netdev;
1173 
1174         switch (ec) {
1175         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1176 
1177                 if (!port) {
1178                         netdev_err(dev, "unknown portnum %x\n", portnum);
1179                         break;
1180                 }
1181 
1182                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1183                         if (!netif_carrier_ok(dev)) {
1184                                 ret = ehea_sense_port_attr(port);
1185                                 if (ret) {
1186                                         netdev_err(dev, "failed resensing port attributes\n");
1187                                         break;
1188                                 }
1189 
1190                                 netif_info(port, link, dev,
1191                                            "Logical port up: %dMbps %s Duplex\n",
1192                                            port->port_speed,
1193                                            port->full_duplex == 1 ?
1194                                            "Full" : "Half");
1195 
1196                                 netif_carrier_on(dev);
1197                                 netif_wake_queue(dev);
1198                         }
1199                 } else
1200                         if (netif_carrier_ok(dev)) {
1201                                 netif_info(port, link, dev,
1202                                            "Logical port down\n");
1203                                 netif_carrier_off(dev);
1204                                 netif_tx_disable(dev);
1205                         }
1206 
1207                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1208                         port->phy_link = EHEA_PHY_LINK_UP;
1209                         netif_info(port, link, dev,
1210                                    "Physical port up\n");
1211                         if (prop_carrier_state)
1212                                 netif_carrier_on(dev);
1213                 } else {
1214                         port->phy_link = EHEA_PHY_LINK_DOWN;
1215                         netif_info(port, link, dev,
1216                                    "Physical port down\n");
1217                         if (prop_carrier_state)
1218                                 netif_carrier_off(dev);
1219                 }
1220 
1221                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1222                         netdev_info(dev,
1223                                     "External switch port is primary port\n");
1224                 else
1225                         netdev_info(dev,
1226                                     "External switch port is backup port\n");
1227 
1228                 break;
1229         case EHEA_EC_ADAPTER_MALFUNC:
1230                 netdev_err(dev, "Adapter malfunction\n");
1231                 break;
1232         case EHEA_EC_PORT_MALFUNC:
1233                 netdev_info(dev, "Port malfunction\n");
1234                 netif_carrier_off(dev);
1235                 netif_tx_disable(dev);
1236                 break;
1237         default:
1238                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1239                 break;
1240         }
1241 }
1242 
1243 static void ehea_neq_tasklet(unsigned long data)
1244 {
1245         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1246         struct ehea_eqe *eqe;
1247         u64 event_mask;
1248 
1249         eqe = ehea_poll_eq(adapter->neq);
1250         pr_debug("eqe=%p\n", eqe);
1251 
1252         while (eqe) {
1253                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1254                 ehea_parse_eqe(adapter, eqe->entry);
1255                 eqe = ehea_poll_eq(adapter->neq);
1256                 pr_debug("next eqe=%p\n", eqe);
1257         }
1258 
1259         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1260                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1261                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1262 
1263         ehea_h_reset_events(adapter->handle,
1264                             adapter->neq->fw_handle, event_mask);
1265 }
1266 
1267 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1268 {
1269         struct ehea_adapter *adapter = param;
1270         tasklet_hi_schedule(&adapter->neq_tasklet);
1271         return IRQ_HANDLED;
1272 }
1273 
1274 
1275 static int ehea_fill_port_res(struct ehea_port_res *pr)
1276 {
1277         int ret;
1278         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1279 
1280         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1281 
1282         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1283 
1284         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1285 
1286         return ret;
1287 }
1288 
1289 static int ehea_reg_interrupts(struct net_device *dev)
1290 {
1291         struct ehea_port *port = netdev_priv(dev);
1292         struct ehea_port_res *pr;
1293         int i, ret;
1294 
1295 
1296         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1297                  dev->name);
1298 
1299         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1300                                   ehea_qp_aff_irq_handler,
1301                                   0, port->int_aff_name, port);
1302         if (ret) {
1303                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1304                            port->qp_eq->attr.ist1);
1305                 goto out_free_qpeq;
1306         }
1307 
1308         netif_info(port, ifup, dev,
1309                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1310                    port->qp_eq->attr.ist1);
1311 
1312 
1313         for (i = 0; i < port->num_def_qps; i++) {
1314                 pr = &port->port_res[i];
1315                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1316                          "%s-queue%d", dev->name, i);
1317                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1318                                           ehea_recv_irq_handler,
1319                                           0, pr->int_send_name, pr);
1320                 if (ret) {
1321                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1322                                    i, pr->eq->attr.ist1);
1323                         goto out_free_req;
1324                 }
1325                 netif_info(port, ifup, dev,
1326                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1327                            pr->eq->attr.ist1, i);
1328         }
1329 out:
1330         return ret;
1331 
1332 
1333 out_free_req:
1334         while (--i >= 0) {
1335                 u32 ist = port->port_res[i].eq->attr.ist1;
1336                 ibmebus_free_irq(ist, &port->port_res[i]);
1337         }
1338 
1339 out_free_qpeq:
1340         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1341         i = port->num_def_qps;
1342 
1343         goto out;
1344 
1345 }
1346 
1347 static void ehea_free_interrupts(struct net_device *dev)
1348 {
1349         struct ehea_port *port = netdev_priv(dev);
1350         struct ehea_port_res *pr;
1351         int i;
1352 
1353         /* send */
1354 
1355         for (i = 0; i < port->num_def_qps; i++) {
1356                 pr = &port->port_res[i];
1357                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1358                 netif_info(port, intr, dev,
1359                            "free send irq for res %d with handle 0x%X\n",
1360                            i, pr->eq->attr.ist1);
1361         }
1362 
1363         /* associated events */
1364         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1365         netif_info(port, intr, dev,
1366                    "associated event interrupt for handle 0x%X freed\n",
1367                    port->qp_eq->attr.ist1);
1368 }
1369 
1370 static int ehea_configure_port(struct ehea_port *port)
1371 {
1372         int ret, i;
1373         u64 hret, mask;
1374         struct hcp_ehea_port_cb0 *cb0;
1375 
1376         ret = -ENOMEM;
1377         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1378         if (!cb0)
1379                 goto out;
1380 
1381         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1382                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1383                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1384                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1385                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1386                                       PXLY_RC_VLAN_FILTER)
1387                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1388 
1389         for (i = 0; i < port->num_mcs; i++)
1390                 if (use_mcs)
1391                         cb0->default_qpn_arr[i] =
1392                                 port->port_res[i].qp->init_attr.qp_nr;
1393                 else
1394                         cb0->default_qpn_arr[i] =
1395                                 port->port_res[0].qp->init_attr.qp_nr;
1396 
1397         if (netif_msg_ifup(port))
1398                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1399 
1400         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1401              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1402 
1403         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1404                                        port->logical_port_id,
1405                                        H_PORT_CB0, mask, cb0);
1406         ret = -EIO;
1407         if (hret != H_SUCCESS)
1408                 goto out_free;
1409 
1410         ret = 0;
1411 
1412 out_free:
1413         free_page((unsigned long)cb0);
1414 out:
1415         return ret;
1416 }
1417 
1418 static int ehea_gen_smrs(struct ehea_port_res *pr)
1419 {
1420         int ret;
1421         struct ehea_adapter *adapter = pr->port->adapter;
1422 
1423         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1424         if (ret)
1425                 goto out;
1426 
1427         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1428         if (ret)
1429                 goto out_free;
1430 
1431         return 0;
1432 
1433 out_free:
1434         ehea_rem_mr(&pr->send_mr);
1435 out:
1436         pr_err("Generating SMRS failed\n");
1437         return -EIO;
1438 }
1439 
1440 static int ehea_rem_smrs(struct ehea_port_res *pr)
1441 {
1442         if ((ehea_rem_mr(&pr->send_mr)) ||
1443             (ehea_rem_mr(&pr->recv_mr)))
1444                 return -EIO;
1445         else
1446                 return 0;
1447 }
1448 
1449 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1450 {
1451         int arr_size = sizeof(void *) * max_q_entries;
1452 
1453         q_skba->arr = vzalloc(arr_size);
1454         if (!q_skba->arr)
1455                 return -ENOMEM;
1456 
1457         q_skba->len = max_q_entries;
1458         q_skba->index = 0;
1459         q_skba->os_skbs = 0;
1460 
1461         return 0;
1462 }
1463 
1464 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1465                               struct port_res_cfg *pr_cfg, int queue_token)
1466 {
1467         struct ehea_adapter *adapter = port->adapter;
1468         enum ehea_eq_type eq_type = EHEA_EQ;
1469         struct ehea_qp_init_attr *init_attr = NULL;
1470         int ret = -EIO;
1471         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1472 
1473         tx_bytes = pr->tx_bytes;
1474         tx_packets = pr->tx_packets;
1475         rx_bytes = pr->rx_bytes;
1476         rx_packets = pr->rx_packets;
1477 
1478         memset(pr, 0, sizeof(struct ehea_port_res));
1479 
1480         pr->tx_bytes = rx_bytes;
1481         pr->tx_packets = tx_packets;
1482         pr->rx_bytes = rx_bytes;
1483         pr->rx_packets = rx_packets;
1484 
1485         pr->port = port;
1486 
1487         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1488         if (!pr->eq) {
1489                 pr_err("create_eq failed (eq)\n");
1490                 goto out_free;
1491         }
1492 
1493         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1494                                      pr->eq->fw_handle,
1495                                      port->logical_port_id);
1496         if (!pr->recv_cq) {
1497                 pr_err("create_cq failed (cq_recv)\n");
1498                 goto out_free;
1499         }
1500 
1501         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1502                                      pr->eq->fw_handle,
1503                                      port->logical_port_id);
1504         if (!pr->send_cq) {
1505                 pr_err("create_cq failed (cq_send)\n");
1506                 goto out_free;
1507         }
1508 
1509         if (netif_msg_ifup(port))
1510                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1511                         pr->send_cq->attr.act_nr_of_cqes,
1512                         pr->recv_cq->attr.act_nr_of_cqes);
1513 
1514         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1515         if (!init_attr) {
1516                 ret = -ENOMEM;
1517                 pr_err("no mem for ehea_qp_init_attr\n");
1518                 goto out_free;
1519         }
1520 
1521         init_attr->low_lat_rq1 = 1;
1522         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1523         init_attr->rq_count = 3;
1524         init_attr->qp_token = queue_token;
1525         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1526         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1527         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1528         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1529         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1530         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1531         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1532         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1533         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1534         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1535         init_attr->port_nr = port->logical_port_id;
1536         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1537         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1538         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1539 
1540         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1541         if (!pr->qp) {
1542                 pr_err("create_qp failed\n");
1543                 ret = -EIO;
1544                 goto out_free;
1545         }
1546 
1547         if (netif_msg_ifup(port))
1548                 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1549                         init_attr->qp_nr,
1550                         init_attr->act_nr_send_wqes,
1551                         init_attr->act_nr_rwqes_rq1,
1552                         init_attr->act_nr_rwqes_rq2,
1553                         init_attr->act_nr_rwqes_rq3);
1554 
1555         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1556 
1557         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1558         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1559         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1560         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1561         if (ret)
1562                 goto out_free;
1563 
1564         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1565         if (ehea_gen_smrs(pr) != 0) {
1566                 ret = -EIO;
1567                 goto out_free;
1568         }
1569 
1570         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1571 
1572         kfree(init_attr);
1573 
1574         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1575 
1576         ret = 0;
1577         goto out;
1578 
1579 out_free:
1580         kfree(init_attr);
1581         vfree(pr->sq_skba.arr);
1582         vfree(pr->rq1_skba.arr);
1583         vfree(pr->rq2_skba.arr);
1584         vfree(pr->rq3_skba.arr);
1585         ehea_destroy_qp(pr->qp);
1586         ehea_destroy_cq(pr->send_cq);
1587         ehea_destroy_cq(pr->recv_cq);
1588         ehea_destroy_eq(pr->eq);
1589 out:
1590         return ret;
1591 }
1592 
1593 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1594 {
1595         int ret, i;
1596 
1597         if (pr->qp)
1598                 netif_napi_del(&pr->napi);
1599 
1600         ret = ehea_destroy_qp(pr->qp);
1601 
1602         if (!ret) {
1603                 ehea_destroy_cq(pr->send_cq);
1604                 ehea_destroy_cq(pr->recv_cq);
1605                 ehea_destroy_eq(pr->eq);
1606 
1607                 for (i = 0; i < pr->rq1_skba.len; i++)
1608                         if (pr->rq1_skba.arr[i])
1609                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1610 
1611                 for (i = 0; i < pr->rq2_skba.len; i++)
1612                         if (pr->rq2_skba.arr[i])
1613                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1614 
1615                 for (i = 0; i < pr->rq3_skba.len; i++)
1616                         if (pr->rq3_skba.arr[i])
1617                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1618 
1619                 for (i = 0; i < pr->sq_skba.len; i++)
1620                         if (pr->sq_skba.arr[i])
1621                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1622 
1623                 vfree(pr->rq1_skba.arr);
1624                 vfree(pr->rq2_skba.arr);
1625                 vfree(pr->rq3_skba.arr);
1626                 vfree(pr->sq_skba.arr);
1627                 ret = ehea_rem_smrs(pr);
1628         }
1629         return ret;
1630 }
1631 
1632 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1633                                   u32 lkey)
1634 {
1635         int skb_data_size = skb_headlen(skb);
1636         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1637         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1638         unsigned int immediate_len = SWQE2_MAX_IMM;
1639 
1640         swqe->descriptors = 0;
1641 
1642         if (skb_is_gso(skb)) {
1643                 swqe->tx_control |= EHEA_SWQE_TSO;
1644                 swqe->mss = skb_shinfo(skb)->gso_size;
1645                 /*
1646                  * For TSO packets we only copy the headers into the
1647                  * immediate area.
1648                  */
1649                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1650         }
1651 
1652         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1653                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1654                 swqe->immediate_data_length = immediate_len;
1655 
1656                 if (skb_data_size > immediate_len) {
1657                         sg1entry->l_key = lkey;
1658                         sg1entry->len = skb_data_size - immediate_len;
1659                         sg1entry->vaddr =
1660                                 ehea_map_vaddr(skb->data + immediate_len);
1661                         swqe->descriptors++;
1662                 }
1663         } else {
1664                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1665                 swqe->immediate_data_length = skb_data_size;
1666         }
1667 }
1668 
1669 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1670                                     struct ehea_swqe *swqe, u32 lkey)
1671 {
1672         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1673         skb_frag_t *frag;
1674         int nfrags, sg1entry_contains_frag_data, i;
1675 
1676         nfrags = skb_shinfo(skb)->nr_frags;
1677         sg1entry = &swqe->u.immdata_desc.sg_entry;
1678         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1679         sg1entry_contains_frag_data = 0;
1680 
1681         write_swqe2_immediate(skb, swqe, lkey);
1682 
1683         /* write descriptors */
1684         if (nfrags > 0) {
1685                 if (swqe->descriptors == 0) {
1686                         /* sg1entry not yet used */
1687                         frag = &skb_shinfo(skb)->frags[0];
1688 
1689                         /* copy sg1entry data */
1690                         sg1entry->l_key = lkey;
1691                         sg1entry->len = skb_frag_size(frag);
1692                         sg1entry->vaddr =
1693                                 ehea_map_vaddr(skb_frag_address(frag));
1694                         swqe->descriptors++;
1695                         sg1entry_contains_frag_data = 1;
1696                 }
1697 
1698                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1699 
1700                         frag = &skb_shinfo(skb)->frags[i];
1701                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1702 
1703                         sgentry->l_key = lkey;
1704                         sgentry->len = skb_frag_size(frag);
1705                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1706                         swqe->descriptors++;
1707                 }
1708         }
1709 }
1710 
1711 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1712 {
1713         int ret = 0;
1714         u64 hret;
1715         u8 reg_type;
1716 
1717         /* De/Register untagged packets */
1718         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1719         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1720                                      port->logical_port_id,
1721                                      reg_type, port->mac_addr, 0, hcallid);
1722         if (hret != H_SUCCESS) {
1723                 pr_err("%sregistering bc address failed (tagged)\n",
1724                        hcallid == H_REG_BCMC ? "" : "de");
1725                 ret = -EIO;
1726                 goto out_herr;
1727         }
1728 
1729         /* De/Register VLAN packets */
1730         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1731         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1732                                      port->logical_port_id,
1733                                      reg_type, port->mac_addr, 0, hcallid);
1734         if (hret != H_SUCCESS) {
1735                 pr_err("%sregistering bc address failed (vlan)\n",
1736                        hcallid == H_REG_BCMC ? "" : "de");
1737                 ret = -EIO;
1738         }
1739 out_herr:
1740         return ret;
1741 }
1742 
1743 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1744 {
1745         struct ehea_port *port = netdev_priv(dev);
1746         struct sockaddr *mac_addr = sa;
1747         struct hcp_ehea_port_cb0 *cb0;
1748         int ret;
1749         u64 hret;
1750 
1751         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1752                 ret = -EADDRNOTAVAIL;
1753                 goto out;
1754         }
1755 
1756         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1757         if (!cb0) {
1758                 pr_err("no mem for cb0\n");
1759                 ret = -ENOMEM;
1760                 goto out;
1761         }
1762 
1763         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1764 
1765         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1766 
1767         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1768                                        port->logical_port_id, H_PORT_CB0,
1769                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1770         if (hret != H_SUCCESS) {
1771                 ret = -EIO;
1772                 goto out_free;
1773         }
1774 
1775         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1776 
1777         /* Deregister old MAC in pHYP */
1778         if (port->state == EHEA_PORT_UP) {
1779                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1780                 if (ret)
1781                         goto out_upregs;
1782         }
1783 
1784         port->mac_addr = cb0->port_mac_addr << 16;
1785 
1786         /* Register new MAC in pHYP */
1787         if (port->state == EHEA_PORT_UP) {
1788                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1789                 if (ret)
1790                         goto out_upregs;
1791         }
1792 
1793         ret = 0;
1794 
1795 out_upregs:
1796         ehea_update_bcmc_registrations();
1797 out_free:
1798         free_page((unsigned long)cb0);
1799 out:
1800         return ret;
1801 }
1802 
1803 static void ehea_promiscuous_error(u64 hret, int enable)
1804 {
1805         if (hret == H_AUTHORITY)
1806                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1807                         enable == 1 ? "en" : "dis");
1808         else
1809                 pr_err("failed %sabling promiscuous mode\n",
1810                        enable == 1 ? "en" : "dis");
1811 }
1812 
1813 static void ehea_promiscuous(struct net_device *dev, int enable)
1814 {
1815         struct ehea_port *port = netdev_priv(dev);
1816         struct hcp_ehea_port_cb7 *cb7;
1817         u64 hret;
1818 
1819         if (enable == port->promisc)
1820                 return;
1821 
1822         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1823         if (!cb7) {
1824                 pr_err("no mem for cb7\n");
1825                 goto out;
1826         }
1827 
1828         /* Modify Pxs_DUCQPN in CB7 */
1829         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1830 
1831         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1832                                        port->logical_port_id,
1833                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1834         if (hret) {
1835                 ehea_promiscuous_error(hret, enable);
1836                 goto out;
1837         }
1838 
1839         port->promisc = enable;
1840 out:
1841         free_page((unsigned long)cb7);
1842 }
1843 
1844 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1845                                      u32 hcallid)
1846 {
1847         u64 hret;
1848         u8 reg_type;
1849 
1850         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1851         if (mc_mac_addr == 0)
1852                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1853 
1854         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1855                                      port->logical_port_id,
1856                                      reg_type, mc_mac_addr, 0, hcallid);
1857         if (hret)
1858                 goto out;
1859 
1860         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1861         if (mc_mac_addr == 0)
1862                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1863 
1864         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1865                                      port->logical_port_id,
1866                                      reg_type, mc_mac_addr, 0, hcallid);
1867 out:
1868         return hret;
1869 }
1870 
1871 static int ehea_drop_multicast_list(struct net_device *dev)
1872 {
1873         struct ehea_port *port = netdev_priv(dev);
1874         struct ehea_mc_list *mc_entry = port->mc_list;
1875         struct list_head *pos;
1876         struct list_head *temp;
1877         int ret = 0;
1878         u64 hret;
1879 
1880         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1881                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1882 
1883                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1884                                                  H_DEREG_BCMC);
1885                 if (hret) {
1886                         pr_err("failed deregistering mcast MAC\n");
1887                         ret = -EIO;
1888                 }
1889 
1890                 list_del(pos);
1891                 kfree(mc_entry);
1892         }
1893         return ret;
1894 }
1895 
1896 static void ehea_allmulti(struct net_device *dev, int enable)
1897 {
1898         struct ehea_port *port = netdev_priv(dev);
1899         u64 hret;
1900 
1901         if (!port->allmulti) {
1902                 if (enable) {
1903                         /* Enable ALLMULTI */
1904                         ehea_drop_multicast_list(dev);
1905                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1906                         if (!hret)
1907                                 port->allmulti = 1;
1908                         else
1909                                 netdev_err(dev,
1910                                            "failed enabling IFF_ALLMULTI\n");
1911                 }
1912         } else {
1913                 if (!enable) {
1914                         /* Disable ALLMULTI */
1915                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1916                         if (!hret)
1917                                 port->allmulti = 0;
1918                         else
1919                                 netdev_err(dev,
1920                                            "failed disabling IFF_ALLMULTI\n");
1921                 }
1922         }
1923 }
1924 
1925 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1926 {
1927         struct ehea_mc_list *ehea_mcl_entry;
1928         u64 hret;
1929 
1930         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1931         if (!ehea_mcl_entry)
1932                 return;
1933 
1934         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1935 
1936         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1937 
1938         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1939                                          H_REG_BCMC);
1940         if (!hret)
1941                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1942         else {
1943                 pr_err("failed registering mcast MAC\n");
1944                 kfree(ehea_mcl_entry);
1945         }
1946 }
1947 
1948 static void ehea_set_multicast_list(struct net_device *dev)
1949 {
1950         struct ehea_port *port = netdev_priv(dev);
1951         struct netdev_hw_addr *ha;
1952         int ret;
1953 
1954         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1955 
1956         if (dev->flags & IFF_ALLMULTI) {
1957                 ehea_allmulti(dev, 1);
1958                 goto out;
1959         }
1960         ehea_allmulti(dev, 0);
1961 
1962         if (!netdev_mc_empty(dev)) {
1963                 ret = ehea_drop_multicast_list(dev);
1964                 if (ret) {
1965                         /* Dropping the current multicast list failed.
1966                          * Enabling ALL_MULTI is the best we can do.
1967                          */
1968                         ehea_allmulti(dev, 1);
1969                 }
1970 
1971                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1972                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1973                                 port->adapter->max_mc_mac);
1974                         goto out;
1975                 }
1976 
1977                 netdev_for_each_mc_addr(ha, dev)
1978                         ehea_add_multicast_entry(port, ha->addr);
1979 
1980         }
1981 out:
1982         ehea_update_bcmc_registrations();
1983 }
1984 
1985 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1986 {
1987         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1988                 return -EINVAL;
1989         dev->mtu = new_mtu;
1990         return 0;
1991 }
1992 
1993 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1994 {
1995         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1996 
1997         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1998                 return;
1999 
2000         if (skb->ip_summed == CHECKSUM_PARTIAL)
2001                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
2002 
2003         swqe->ip_start = skb_network_offset(skb);
2004         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
2005 
2006         switch (ip_hdr(skb)->protocol) {
2007         case IPPROTO_UDP:
2008                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2009                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2010 
2011                 swqe->tcp_offset = swqe->ip_end + 1 +
2012                                    offsetof(struct udphdr, check);
2013                 break;
2014 
2015         case IPPROTO_TCP:
2016                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2017                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2018 
2019                 swqe->tcp_offset = swqe->ip_end + 1 +
2020                                    offsetof(struct tcphdr, check);
2021                 break;
2022         }
2023 }
2024 
2025 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2026                        struct ehea_swqe *swqe, u32 lkey)
2027 {
2028         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2029 
2030         xmit_common(skb, swqe);
2031 
2032         write_swqe2_data(skb, dev, swqe, lkey);
2033 }
2034 
2035 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2036                        struct ehea_swqe *swqe)
2037 {
2038         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2039 
2040         xmit_common(skb, swqe);
2041 
2042         if (!skb->data_len)
2043                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2044         else
2045                 skb_copy_bits(skb, 0, imm_data, skb->len);
2046 
2047         swqe->immediate_data_length = skb->len;
2048         dev_consume_skb_any(skb);
2049 }
2050 
2051 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2052 {
2053         struct ehea_port *port = netdev_priv(dev);
2054         struct ehea_swqe *swqe;
2055         u32 lkey;
2056         int swqe_index;
2057         struct ehea_port_res *pr;
2058         struct netdev_queue *txq;
2059 
2060         pr = &port->port_res[skb_get_queue_mapping(skb)];
2061         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2062 
2063         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2064         memset(swqe, 0, SWQE_HEADER_SIZE);
2065         atomic_dec(&pr->swqe_avail);
2066 
2067         if (vlan_tx_tag_present(skb)) {
2068                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2069                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2070         }
2071 
2072         pr->tx_packets++;
2073         pr->tx_bytes += skb->len;
2074 
2075         if (skb->len <= SWQE3_MAX_IMM) {
2076                 u32 sig_iv = port->sig_comp_iv;
2077                 u32 swqe_num = pr->swqe_id_counter;
2078                 ehea_xmit3(skb, dev, swqe);
2079                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2080                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2081                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2082                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2083                                                       sig_iv);
2084                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2085                         pr->swqe_ll_count = 0;
2086                 } else
2087                         pr->swqe_ll_count += 1;
2088         } else {
2089                 swqe->wr_id =
2090                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2091                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2092                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2093                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2094                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2095 
2096                 pr->sq_skba.index++;
2097                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2098 
2099                 lkey = pr->send_mr.lkey;
2100                 ehea_xmit2(skb, dev, swqe, lkey);
2101                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2102         }
2103         pr->swqe_id_counter += 1;
2104 
2105         netif_info(port, tx_queued, dev,
2106                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2107         if (netif_msg_tx_queued(port))
2108                 ehea_dump(swqe, 512, "swqe");
2109 
2110         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2111                 netif_tx_stop_queue(txq);
2112                 swqe->tx_control |= EHEA_SWQE_PURGE;
2113         }
2114 
2115         ehea_post_swqe(pr->qp, swqe);
2116 
2117         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2118                 pr->p_stats.queue_stopped++;
2119                 netif_tx_stop_queue(txq);
2120         }
2121 
2122         return NETDEV_TX_OK;
2123 }
2124 
2125 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2126 {
2127         struct ehea_port *port = netdev_priv(dev);
2128         struct ehea_adapter *adapter = port->adapter;
2129         struct hcp_ehea_port_cb1 *cb1;
2130         int index;
2131         u64 hret;
2132         int err = 0;
2133 
2134         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2135         if (!cb1) {
2136                 pr_err("no mem for cb1\n");
2137                 err = -ENOMEM;
2138                 goto out;
2139         }
2140 
2141         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2142                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2143         if (hret != H_SUCCESS) {
2144                 pr_err("query_ehea_port failed\n");
2145                 err = -EINVAL;
2146                 goto out;
2147         }
2148 
2149         index = (vid / 64);
2150         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2151 
2152         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2153                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2154         if (hret != H_SUCCESS) {
2155                 pr_err("modify_ehea_port failed\n");
2156                 err = -EINVAL;
2157         }
2158 out:
2159         free_page((unsigned long)cb1);
2160         return err;
2161 }
2162 
2163 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2164 {
2165         struct ehea_port *port = netdev_priv(dev);
2166         struct ehea_adapter *adapter = port->adapter;
2167         struct hcp_ehea_port_cb1 *cb1;
2168         int index;
2169         u64 hret;
2170         int err = 0;
2171 
2172         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2173         if (!cb1) {
2174                 pr_err("no mem for cb1\n");
2175                 err = -ENOMEM;
2176                 goto out;
2177         }
2178 
2179         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2180                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2181         if (hret != H_SUCCESS) {
2182                 pr_err("query_ehea_port failed\n");
2183                 err = -EINVAL;
2184                 goto out;
2185         }
2186 
2187         index = (vid / 64);
2188         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2189 
2190         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2191                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2192         if (hret != H_SUCCESS) {
2193                 pr_err("modify_ehea_port failed\n");
2194                 err = -EINVAL;
2195         }
2196 out:
2197         free_page((unsigned long)cb1);
2198         return err;
2199 }
2200 
2201 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2202 {
2203         int ret = -EIO;
2204         u64 hret;
2205         u16 dummy16 = 0;
2206         u64 dummy64 = 0;
2207         struct hcp_modify_qp_cb0 *cb0;
2208 
2209         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2210         if (!cb0) {
2211                 ret = -ENOMEM;
2212                 goto out;
2213         }
2214 
2215         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2216                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2217         if (hret != H_SUCCESS) {
2218                 pr_err("query_ehea_qp failed (1)\n");
2219                 goto out;
2220         }
2221 
2222         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2223         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2224                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2225                                      &dummy64, &dummy64, &dummy16, &dummy16);
2226         if (hret != H_SUCCESS) {
2227                 pr_err("modify_ehea_qp failed (1)\n");
2228                 goto out;
2229         }
2230 
2231         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2232                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2233         if (hret != H_SUCCESS) {
2234                 pr_err("query_ehea_qp failed (2)\n");
2235                 goto out;
2236         }
2237 
2238         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2239         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2240                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2241                                      &dummy64, &dummy64, &dummy16, &dummy16);
2242         if (hret != H_SUCCESS) {
2243                 pr_err("modify_ehea_qp failed (2)\n");
2244                 goto out;
2245         }
2246 
2247         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2248                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2249         if (hret != H_SUCCESS) {
2250                 pr_err("query_ehea_qp failed (3)\n");
2251                 goto out;
2252         }
2253 
2254         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2255         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2256                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2257                                      &dummy64, &dummy64, &dummy16, &dummy16);
2258         if (hret != H_SUCCESS) {
2259                 pr_err("modify_ehea_qp failed (3)\n");
2260                 goto out;
2261         }
2262 
2263         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2264                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2265         if (hret != H_SUCCESS) {
2266                 pr_err("query_ehea_qp failed (4)\n");
2267                 goto out;
2268         }
2269 
2270         ret = 0;
2271 out:
2272         free_page((unsigned long)cb0);
2273         return ret;
2274 }
2275 
2276 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2277 {
2278         int ret, i;
2279         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2280         enum ehea_eq_type eq_type = EHEA_EQ;
2281 
2282         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2283                                    EHEA_MAX_ENTRIES_EQ, 1);
2284         if (!port->qp_eq) {
2285                 ret = -EINVAL;
2286                 pr_err("ehea_create_eq failed (qp_eq)\n");
2287                 goto out_kill_eq;
2288         }
2289 
2290         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2291         pr_cfg.max_entries_scq = sq_entries * 2;
2292         pr_cfg.max_entries_sq = sq_entries;
2293         pr_cfg.max_entries_rq1 = rq1_entries;
2294         pr_cfg.max_entries_rq2 = rq2_entries;
2295         pr_cfg.max_entries_rq3 = rq3_entries;
2296 
2297         pr_cfg_small_rx.max_entries_rcq = 1;
2298         pr_cfg_small_rx.max_entries_scq = sq_entries;
2299         pr_cfg_small_rx.max_entries_sq = sq_entries;
2300         pr_cfg_small_rx.max_entries_rq1 = 1;
2301         pr_cfg_small_rx.max_entries_rq2 = 1;
2302         pr_cfg_small_rx.max_entries_rq3 = 1;
2303 
2304         for (i = 0; i < def_qps; i++) {
2305                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2306                 if (ret)
2307                         goto out_clean_pr;
2308         }
2309         for (i = def_qps; i < def_qps; i++) {
2310                 ret = ehea_init_port_res(port, &port->port_res[i],
2311                                          &pr_cfg_small_rx, i);
2312                 if (ret)
2313                         goto out_clean_pr;
2314         }
2315 
2316         return 0;
2317 
2318 out_clean_pr:
2319         while (--i >= 0)
2320                 ehea_clean_portres(port, &port->port_res[i]);
2321 
2322 out_kill_eq:
2323         ehea_destroy_eq(port->qp_eq);
2324         return ret;
2325 }
2326 
2327 static int ehea_clean_all_portres(struct ehea_port *port)
2328 {
2329         int ret = 0;
2330         int i;
2331 
2332         for (i = 0; i < port->num_def_qps; i++)
2333                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2334 
2335         ret |= ehea_destroy_eq(port->qp_eq);
2336 
2337         return ret;
2338 }
2339 
2340 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2341 {
2342         if (adapter->active_ports)
2343                 return;
2344 
2345         ehea_rem_mr(&adapter->mr);
2346 }
2347 
2348 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2349 {
2350         if (adapter->active_ports)
2351                 return 0;
2352 
2353         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2354 }
2355 
2356 static int ehea_up(struct net_device *dev)
2357 {
2358         int ret, i;
2359         struct ehea_port *port = netdev_priv(dev);
2360 
2361         if (port->state == EHEA_PORT_UP)
2362                 return 0;
2363 
2364         ret = ehea_port_res_setup(port, port->num_def_qps);
2365         if (ret) {
2366                 netdev_err(dev, "port_res_failed\n");
2367                 goto out;
2368         }
2369 
2370         /* Set default QP for this port */
2371         ret = ehea_configure_port(port);
2372         if (ret) {
2373                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2374                 goto out_clean_pr;
2375         }
2376 
2377         ret = ehea_reg_interrupts(dev);
2378         if (ret) {
2379                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2380                 goto out_clean_pr;
2381         }
2382 
2383         for (i = 0; i < port->num_def_qps; i++) {
2384                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2385                 if (ret) {
2386                         netdev_err(dev, "activate_qp failed\n");
2387                         goto out_free_irqs;
2388                 }
2389         }
2390 
2391         for (i = 0; i < port->num_def_qps; i++) {
2392                 ret = ehea_fill_port_res(&port->port_res[i]);
2393                 if (ret) {
2394                         netdev_err(dev, "out_free_irqs\n");
2395                         goto out_free_irqs;
2396                 }
2397         }
2398 
2399         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2400         if (ret) {
2401                 ret = -EIO;
2402                 goto out_free_irqs;
2403         }
2404 
2405         port->state = EHEA_PORT_UP;
2406 
2407         ret = 0;
2408         goto out;
2409 
2410 out_free_irqs:
2411         ehea_free_interrupts(dev);
2412 
2413 out_clean_pr:
2414         ehea_clean_all_portres(port);
2415 out:
2416         if (ret)
2417                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2418 
2419         ehea_update_bcmc_registrations();
2420         ehea_update_firmware_handles();
2421 
2422         return ret;
2423 }
2424 
2425 static void port_napi_disable(struct ehea_port *port)
2426 {
2427         int i;
2428 
2429         for (i = 0; i < port->num_def_qps; i++)
2430                 napi_disable(&port->port_res[i].napi);
2431 }
2432 
2433 static void port_napi_enable(struct ehea_port *port)
2434 {
2435         int i;
2436 
2437         for (i = 0; i < port->num_def_qps; i++)
2438                 napi_enable(&port->port_res[i].napi);
2439 }
2440 
2441 static int ehea_open(struct net_device *dev)
2442 {
2443         int ret;
2444         struct ehea_port *port = netdev_priv(dev);
2445 
2446         mutex_lock(&port->port_lock);
2447 
2448         netif_info(port, ifup, dev, "enabling port\n");
2449 
2450         ret = ehea_up(dev);
2451         if (!ret) {
2452                 port_napi_enable(port);
2453                 netif_tx_start_all_queues(dev);
2454         }
2455 
2456         mutex_unlock(&port->port_lock);
2457         schedule_delayed_work(&port->stats_work,
2458                               round_jiffies_relative(msecs_to_jiffies(1000)));
2459 
2460         return ret;
2461 }
2462 
2463 static int ehea_down(struct net_device *dev)
2464 {
2465         int ret;
2466         struct ehea_port *port = netdev_priv(dev);
2467 
2468         if (port->state == EHEA_PORT_DOWN)
2469                 return 0;
2470 
2471         ehea_drop_multicast_list(dev);
2472         ehea_allmulti(dev, 0);
2473         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2474 
2475         ehea_free_interrupts(dev);
2476 
2477         port->state = EHEA_PORT_DOWN;
2478 
2479         ehea_update_bcmc_registrations();
2480 
2481         ret = ehea_clean_all_portres(port);
2482         if (ret)
2483                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2484 
2485         ehea_update_firmware_handles();
2486 
2487         return ret;
2488 }
2489 
2490 static int ehea_stop(struct net_device *dev)
2491 {
2492         int ret;
2493         struct ehea_port *port = netdev_priv(dev);
2494 
2495         netif_info(port, ifdown, dev, "disabling port\n");
2496 
2497         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2498         cancel_work_sync(&port->reset_task);
2499         cancel_delayed_work_sync(&port->stats_work);
2500         mutex_lock(&port->port_lock);
2501         netif_tx_stop_all_queues(dev);
2502         port_napi_disable(port);
2503         ret = ehea_down(dev);
2504         mutex_unlock(&port->port_lock);
2505         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2506         return ret;
2507 }
2508 
2509 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2510 {
2511         struct ehea_qp qp = *orig_qp;
2512         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2513         struct ehea_swqe *swqe;
2514         int wqe_index;
2515         int i;
2516 
2517         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2518                 swqe = ehea_get_swqe(&qp, &wqe_index);
2519                 swqe->tx_control |= EHEA_SWQE_PURGE;
2520         }
2521 }
2522 
2523 static void ehea_flush_sq(struct ehea_port *port)
2524 {
2525         int i;
2526 
2527         for (i = 0; i < port->num_def_qps; i++) {
2528                 struct ehea_port_res *pr = &port->port_res[i];
2529                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2530                 int ret;
2531 
2532                 ret = wait_event_timeout(port->swqe_avail_wq,
2533                          atomic_read(&pr->swqe_avail) >= swqe_max,
2534                          msecs_to_jiffies(100));
2535 
2536                 if (!ret) {
2537                         pr_err("WARNING: sq not flushed completely\n");
2538                         break;
2539                 }
2540         }
2541 }
2542 
2543 static int ehea_stop_qps(struct net_device *dev)
2544 {
2545         struct ehea_port *port = netdev_priv(dev);
2546         struct ehea_adapter *adapter = port->adapter;
2547         struct hcp_modify_qp_cb0 *cb0;
2548         int ret = -EIO;
2549         int dret;
2550         int i;
2551         u64 hret;
2552         u64 dummy64 = 0;
2553         u16 dummy16 = 0;
2554 
2555         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2556         if (!cb0) {
2557                 ret = -ENOMEM;
2558                 goto out;
2559         }
2560 
2561         for (i = 0; i < (port->num_def_qps); i++) {
2562                 struct ehea_port_res *pr =  &port->port_res[i];
2563                 struct ehea_qp *qp = pr->qp;
2564 
2565                 /* Purge send queue */
2566                 ehea_purge_sq(qp);
2567 
2568                 /* Disable queue pair */
2569                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2570                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2571                                             cb0);
2572                 if (hret != H_SUCCESS) {
2573                         pr_err("query_ehea_qp failed (1)\n");
2574                         goto out;
2575                 }
2576 
2577                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2578                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2579 
2580                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2581                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2582                                                             1), cb0, &dummy64,
2583                                              &dummy64, &dummy16, &dummy16);
2584                 if (hret != H_SUCCESS) {
2585                         pr_err("modify_ehea_qp failed (1)\n");
2586                         goto out;
2587                 }
2588 
2589                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2590                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2591                                             cb0);
2592                 if (hret != H_SUCCESS) {
2593                         pr_err("query_ehea_qp failed (2)\n");
2594                         goto out;
2595                 }
2596 
2597                 /* deregister shared memory regions */
2598                 dret = ehea_rem_smrs(pr);
2599                 if (dret) {
2600                         pr_err("unreg shared memory region failed\n");
2601                         goto out;
2602                 }
2603         }
2604 
2605         ret = 0;
2606 out:
2607         free_page((unsigned long)cb0);
2608 
2609         return ret;
2610 }
2611 
2612 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2613 {
2614         struct ehea_qp qp = *orig_qp;
2615         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2616         struct ehea_rwqe *rwqe;
2617         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2618         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2619         struct sk_buff *skb;
2620         u32 lkey = pr->recv_mr.lkey;
2621 
2622 
2623         int i;
2624         int index;
2625 
2626         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2627                 rwqe = ehea_get_next_rwqe(&qp, 2);
2628                 rwqe->sg_list[0].l_key = lkey;
2629                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2630                 skb = skba_rq2[index];
2631                 if (skb)
2632                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2633         }
2634 
2635         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2636                 rwqe = ehea_get_next_rwqe(&qp, 3);
2637                 rwqe->sg_list[0].l_key = lkey;
2638                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2639                 skb = skba_rq3[index];
2640                 if (skb)
2641                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2642         }
2643 }
2644 
2645 static int ehea_restart_qps(struct net_device *dev)
2646 {
2647         struct ehea_port *port = netdev_priv(dev);
2648         struct ehea_adapter *adapter = port->adapter;
2649         int ret = 0;
2650         int i;
2651 
2652         struct hcp_modify_qp_cb0 *cb0;
2653         u64 hret;
2654         u64 dummy64 = 0;
2655         u16 dummy16 = 0;
2656 
2657         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2658         if (!cb0) {
2659                 ret = -ENOMEM;
2660                 goto out;
2661         }
2662 
2663         for (i = 0; i < (port->num_def_qps); i++) {
2664                 struct ehea_port_res *pr =  &port->port_res[i];
2665                 struct ehea_qp *qp = pr->qp;
2666 
2667                 ret = ehea_gen_smrs(pr);
2668                 if (ret) {
2669                         netdev_err(dev, "creation of shared memory regions failed\n");
2670                         goto out;
2671                 }
2672 
2673                 ehea_update_rqs(qp, pr);
2674 
2675                 /* Enable queue pair */
2676                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2677                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2678                                             cb0);
2679                 if (hret != H_SUCCESS) {
2680                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2681                         goto out;
2682                 }
2683 
2684                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2685                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2686 
2687                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2688                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2689                                                             1), cb0, &dummy64,
2690                                              &dummy64, &dummy16, &dummy16);
2691                 if (hret != H_SUCCESS) {
2692                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2693                         goto out;
2694                 }
2695 
2696                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2697                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2698                                             cb0);
2699                 if (hret != H_SUCCESS) {
2700                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2701                         goto out;
2702                 }
2703 
2704                 /* refill entire queue */
2705                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2706                 ehea_refill_rq2(pr, 0);
2707                 ehea_refill_rq3(pr, 0);
2708         }
2709 out:
2710         free_page((unsigned long)cb0);
2711 
2712         return ret;
2713 }
2714 
2715 static void ehea_reset_port(struct work_struct *work)
2716 {
2717         int ret;
2718         struct ehea_port *port =
2719                 container_of(work, struct ehea_port, reset_task);
2720         struct net_device *dev = port->netdev;
2721 
2722         mutex_lock(&dlpar_mem_lock);
2723         port->resets++;
2724         mutex_lock(&port->port_lock);
2725         netif_tx_disable(dev);
2726 
2727         port_napi_disable(port);
2728 
2729         ehea_down(dev);
2730 
2731         ret = ehea_up(dev);
2732         if (ret)
2733                 goto out;
2734 
2735         ehea_set_multicast_list(dev);
2736 
2737         netif_info(port, timer, dev, "reset successful\n");
2738 
2739         port_napi_enable(port);
2740 
2741         netif_tx_wake_all_queues(dev);
2742 out:
2743         mutex_unlock(&port->port_lock);
2744         mutex_unlock(&dlpar_mem_lock);
2745 }
2746 
2747 static void ehea_rereg_mrs(void)
2748 {
2749         int ret, i;
2750         struct ehea_adapter *adapter;
2751 
2752         pr_info("LPAR memory changed - re-initializing driver\n");
2753 
2754         list_for_each_entry(adapter, &adapter_list, list)
2755                 if (adapter->active_ports) {
2756                         /* Shutdown all ports */
2757                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2758                                 struct ehea_port *port = adapter->port[i];
2759                                 struct net_device *dev;
2760 
2761                                 if (!port)
2762                                         continue;
2763 
2764                                 dev = port->netdev;
2765 
2766                                 if (dev->flags & IFF_UP) {
2767                                         mutex_lock(&port->port_lock);
2768                                         netif_tx_disable(dev);
2769                                         ehea_flush_sq(port);
2770                                         ret = ehea_stop_qps(dev);
2771                                         if (ret) {
2772                                                 mutex_unlock(&port->port_lock);
2773                                                 goto out;
2774                                         }
2775                                         port_napi_disable(port);
2776                                         mutex_unlock(&port->port_lock);
2777                                 }
2778                                 reset_sq_restart_flag(port);
2779                         }
2780 
2781                         /* Unregister old memory region */
2782                         ret = ehea_rem_mr(&adapter->mr);
2783                         if (ret) {
2784                                 pr_err("unregister MR failed - driver inoperable!\n");
2785                                 goto out;
2786                         }
2787                 }
2788 
2789         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2790 
2791         list_for_each_entry(adapter, &adapter_list, list)
2792                 if (adapter->active_ports) {
2793                         /* Register new memory region */
2794                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2795                         if (ret) {
2796                                 pr_err("register MR failed - driver inoperable!\n");
2797                                 goto out;
2798                         }
2799 
2800                         /* Restart all ports */
2801                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2802                                 struct ehea_port *port = adapter->port[i];
2803 
2804                                 if (port) {
2805                                         struct net_device *dev = port->netdev;
2806 
2807                                         if (dev->flags & IFF_UP) {
2808                                                 mutex_lock(&port->port_lock);
2809                                                 ret = ehea_restart_qps(dev);
2810                                                 if (!ret) {
2811                                                         check_sqs(port);
2812                                                         port_napi_enable(port);
2813                                                         netif_tx_wake_all_queues(dev);
2814                                                 } else {
2815                                                         netdev_err(dev, "Unable to restart QPS\n");
2816                                                 }
2817                                                 mutex_unlock(&port->port_lock);
2818                                         }
2819                                 }
2820                         }
2821                 }
2822         pr_info("re-initializing driver complete\n");
2823 out:
2824         return;
2825 }
2826 
2827 static void ehea_tx_watchdog(struct net_device *dev)
2828 {
2829         struct ehea_port *port = netdev_priv(dev);
2830 
2831         if (netif_carrier_ok(dev) &&
2832             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2833                 ehea_schedule_port_reset(port);
2834 }
2835 
2836 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2837 {
2838         struct hcp_query_ehea *cb;
2839         u64 hret;
2840         int ret;
2841 
2842         cb = (void *)get_zeroed_page(GFP_KERNEL);
2843         if (!cb) {
2844                 ret = -ENOMEM;
2845                 goto out;
2846         }
2847 
2848         hret = ehea_h_query_ehea(adapter->handle, cb);
2849 
2850         if (hret != H_SUCCESS) {
2851                 ret = -EIO;
2852                 goto out_herr;
2853         }
2854 
2855         adapter->max_mc_mac = cb->max_mc_mac - 1;
2856         ret = 0;
2857 
2858 out_herr:
2859         free_page((unsigned long)cb);
2860 out:
2861         return ret;
2862 }
2863 
2864 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2865 {
2866         struct hcp_ehea_port_cb4 *cb4;
2867         u64 hret;
2868         int ret = 0;
2869 
2870         *jumbo = 0;
2871 
2872         /* (Try to) enable *jumbo frames */
2873         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2874         if (!cb4) {
2875                 pr_err("no mem for cb4\n");
2876                 ret = -ENOMEM;
2877                 goto out;
2878         } else {
2879                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2880                                               port->logical_port_id,
2881                                               H_PORT_CB4,
2882                                               H_PORT_CB4_JUMBO, cb4);
2883                 if (hret == H_SUCCESS) {
2884                         if (cb4->jumbo_frame)
2885                                 *jumbo = 1;
2886                         else {
2887                                 cb4->jumbo_frame = 1;
2888                                 hret = ehea_h_modify_ehea_port(port->adapter->
2889                                                                handle,
2890                                                                port->
2891                                                                logical_port_id,
2892                                                                H_PORT_CB4,
2893                                                                H_PORT_CB4_JUMBO,
2894                                                                cb4);
2895                                 if (hret == H_SUCCESS)
2896                                         *jumbo = 1;
2897                         }
2898                 } else
2899                         ret = -EINVAL;
2900 
2901                 free_page((unsigned long)cb4);
2902         }
2903 out:
2904         return ret;
2905 }
2906 
2907 static ssize_t ehea_show_port_id(struct device *dev,
2908                                  struct device_attribute *attr, char *buf)
2909 {
2910         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2911         return sprintf(buf, "%d", port->logical_port_id);
2912 }
2913 
2914 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2915                    NULL);
2916 
2917 static void logical_port_release(struct device *dev)
2918 {
2919         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2920         of_node_put(port->ofdev.dev.of_node);
2921 }
2922 
2923 static struct device *ehea_register_port(struct ehea_port *port,
2924                                          struct device_node *dn)
2925 {
2926         int ret;
2927 
2928         port->ofdev.dev.of_node = of_node_get(dn);
2929         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2930         port->ofdev.dev.bus = &ibmebus_bus_type;
2931 
2932         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2933         port->ofdev.dev.release = logical_port_release;
2934 
2935         ret = of_device_register(&port->ofdev);
2936         if (ret) {
2937                 pr_err("failed to register device. ret=%d\n", ret);
2938                 goto out;
2939         }
2940 
2941         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2942         if (ret) {
2943                 pr_err("failed to register attributes, ret=%d\n", ret);
2944                 goto out_unreg_of_dev;
2945         }
2946 
2947         return &port->ofdev.dev;
2948 
2949 out_unreg_of_dev:
2950         of_device_unregister(&port->ofdev);
2951 out:
2952         return NULL;
2953 }
2954 
2955 static void ehea_unregister_port(struct ehea_port *port)
2956 {
2957         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2958         of_device_unregister(&port->ofdev);
2959 }
2960 
2961 static const struct net_device_ops ehea_netdev_ops = {
2962         .ndo_open               = ehea_open,
2963         .ndo_stop               = ehea_stop,
2964         .ndo_start_xmit         = ehea_start_xmit,
2965 #ifdef CONFIG_NET_POLL_CONTROLLER
2966         .ndo_poll_controller    = ehea_netpoll,
2967 #endif
2968         .ndo_get_stats64        = ehea_get_stats64,
2969         .ndo_set_mac_address    = ehea_set_mac_addr,
2970         .ndo_validate_addr      = eth_validate_addr,
2971         .ndo_set_rx_mode        = ehea_set_multicast_list,
2972         .ndo_change_mtu         = ehea_change_mtu,
2973         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2974         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2975         .ndo_tx_timeout         = ehea_tx_watchdog,
2976 };
2977 
2978 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2979                                          u32 logical_port_id,
2980                                          struct device_node *dn)
2981 {
2982         int ret;
2983         struct net_device *dev;
2984         struct ehea_port *port;
2985         struct device *port_dev;
2986         int jumbo;
2987 
2988         /* allocate memory for the port structures */
2989         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2990 
2991         if (!dev) {
2992                 ret = -ENOMEM;
2993                 goto out_err;
2994         }
2995 
2996         port = netdev_priv(dev);
2997 
2998         mutex_init(&port->port_lock);
2999         port->state = EHEA_PORT_DOWN;
3000         port->sig_comp_iv = sq_entries / 10;
3001 
3002         port->adapter = adapter;
3003         port->netdev = dev;
3004         port->logical_port_id = logical_port_id;
3005 
3006         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3007 
3008         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3009         if (!port->mc_list) {
3010                 ret = -ENOMEM;
3011                 goto out_free_ethdev;
3012         }
3013 
3014         INIT_LIST_HEAD(&port->mc_list->list);
3015 
3016         ret = ehea_sense_port_attr(port);
3017         if (ret)
3018                 goto out_free_mc_list;
3019 
3020         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3021         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3022 
3023         port_dev = ehea_register_port(port, dn);
3024         if (!port_dev)
3025                 goto out_free_mc_list;
3026 
3027         SET_NETDEV_DEV(dev, port_dev);
3028 
3029         /* initialize net_device structure */
3030         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3031 
3032         dev->netdev_ops = &ehea_netdev_ops;
3033         ehea_set_ethtool_ops(dev);
3034 
3035         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3036                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3037         dev->features = NETIF_F_SG | NETIF_F_TSO |
3038                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3039                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3040                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3041         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3042                         NETIF_F_IP_CSUM;
3043         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3044 
3045         INIT_WORK(&port->reset_task, ehea_reset_port);
3046         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3047 
3048         init_waitqueue_head(&port->swqe_avail_wq);
3049         init_waitqueue_head(&port->restart_wq);
3050 
3051         memset(&port->stats, 0, sizeof(struct net_device_stats));
3052         ret = register_netdev(dev);
3053         if (ret) {
3054                 pr_err("register_netdev failed. ret=%d\n", ret);
3055                 goto out_unreg_port;
3056         }
3057 
3058         ret = ehea_get_jumboframe_status(port, &jumbo);
3059         if (ret)
3060                 netdev_err(dev, "failed determining jumbo frame status\n");
3061 
3062         netdev_info(dev, "Jumbo frames are %sabled\n",
3063                     jumbo == 1 ? "en" : "dis");
3064 
3065         adapter->active_ports++;
3066 
3067         return port;
3068 
3069 out_unreg_port:
3070         ehea_unregister_port(port);
3071 
3072 out_free_mc_list:
3073         kfree(port->mc_list);
3074 
3075 out_free_ethdev:
3076         free_netdev(dev);
3077 
3078 out_err:
3079         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3080                logical_port_id, ret);
3081         return NULL;
3082 }
3083 
3084 static void ehea_shutdown_single_port(struct ehea_port *port)
3085 {
3086         struct ehea_adapter *adapter = port->adapter;
3087 
3088         cancel_work_sync(&port->reset_task);
3089         cancel_delayed_work_sync(&port->stats_work);
3090         unregister_netdev(port->netdev);
3091         ehea_unregister_port(port);
3092         kfree(port->mc_list);
3093         free_netdev(port->netdev);
3094         adapter->active_ports--;
3095 }
3096 
3097 static int ehea_setup_ports(struct ehea_adapter *adapter)
3098 {
3099         struct device_node *lhea_dn;
3100         struct device_node *eth_dn = NULL;
3101 
3102         const u32 *dn_log_port_id;
3103         int i = 0;
3104 
3105         lhea_dn = adapter->ofdev->dev.of_node;
3106         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3107 
3108                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3109                                                  NULL);
3110                 if (!dn_log_port_id) {
3111                         pr_err("bad device node: eth_dn name=%s\n",
3112                                eth_dn->full_name);
3113                         continue;
3114                 }
3115 
3116                 if (ehea_add_adapter_mr(adapter)) {
3117                         pr_err("creating MR failed\n");
3118                         of_node_put(eth_dn);
3119                         return -EIO;
3120                 }
3121 
3122                 adapter->port[i] = ehea_setup_single_port(adapter,
3123                                                           *dn_log_port_id,
3124                                                           eth_dn);
3125                 if (adapter->port[i])
3126                         netdev_info(adapter->port[i]->netdev,
3127                                     "logical port id #%d\n", *dn_log_port_id);
3128                 else
3129                         ehea_remove_adapter_mr(adapter);
3130 
3131                 i++;
3132         }
3133         return 0;
3134 }
3135 
3136 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3137                                            u32 logical_port_id)
3138 {
3139         struct device_node *lhea_dn;
3140         struct device_node *eth_dn = NULL;
3141         const u32 *dn_log_port_id;
3142 
3143         lhea_dn = adapter->ofdev->dev.of_node;
3144         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3145 
3146                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3147                                                  NULL);
3148                 if (dn_log_port_id)
3149                         if (*dn_log_port_id == logical_port_id)
3150                                 return eth_dn;
3151         }
3152 
3153         return NULL;
3154 }
3155 
3156 static ssize_t ehea_probe_port(struct device *dev,
3157                                struct device_attribute *attr,
3158                                const char *buf, size_t count)
3159 {
3160         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3161         struct ehea_port *port;
3162         struct device_node *eth_dn = NULL;
3163         int i;
3164 
3165         u32 logical_port_id;
3166 
3167         sscanf(buf, "%d", &logical_port_id);
3168 
3169         port = ehea_get_port(adapter, logical_port_id);
3170 
3171         if (port) {
3172                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3173                             logical_port_id);
3174                 return -EINVAL;
3175         }
3176 
3177         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3178 
3179         if (!eth_dn) {
3180                 pr_info("no logical port with id %d found\n", logical_port_id);
3181                 return -EINVAL;
3182         }
3183 
3184         if (ehea_add_adapter_mr(adapter)) {
3185                 pr_err("creating MR failed\n");
3186                 return -EIO;
3187         }
3188 
3189         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3190 
3191         of_node_put(eth_dn);
3192 
3193         if (port) {
3194                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3195                         if (!adapter->port[i]) {
3196                                 adapter->port[i] = port;
3197                                 break;
3198                         }
3199 
3200                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3201                             logical_port_id);
3202         } else {
3203                 ehea_remove_adapter_mr(adapter);
3204                 return -EIO;
3205         }
3206 
3207         return (ssize_t) count;
3208 }
3209 
3210 static ssize_t ehea_remove_port(struct device *dev,
3211                                 struct device_attribute *attr,
3212                                 const char *buf, size_t count)
3213 {
3214         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3215         struct ehea_port *port;
3216         int i;
3217         u32 logical_port_id;
3218 
3219         sscanf(buf, "%d", &logical_port_id);
3220 
3221         port = ehea_get_port(adapter, logical_port_id);
3222 
3223         if (port) {
3224                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3225                             logical_port_id);
3226 
3227                 ehea_shutdown_single_port(port);
3228 
3229                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3230                         if (adapter->port[i] == port) {
3231                                 adapter->port[i] = NULL;
3232                                 break;
3233                         }
3234         } else {
3235                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3236                        logical_port_id);
3237                 return -EINVAL;
3238         }
3239 
3240         ehea_remove_adapter_mr(adapter);
3241 
3242         return (ssize_t) count;
3243 }
3244 
3245 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3246 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3247 
3248 static int ehea_create_device_sysfs(struct platform_device *dev)
3249 {
3250         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3251         if (ret)
3252                 goto out;
3253 
3254         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3255 out:
3256         return ret;
3257 }
3258 
3259 static void ehea_remove_device_sysfs(struct platform_device *dev)
3260 {
3261         device_remove_file(&dev->dev, &dev_attr_probe_port);
3262         device_remove_file(&dev->dev, &dev_attr_remove_port);
3263 }
3264 
3265 static int ehea_probe_adapter(struct platform_device *dev)
3266 {
3267         struct ehea_adapter *adapter;
3268         const u64 *adapter_handle;
3269         int ret;
3270         int i;
3271 
3272         if (!dev || !dev->dev.of_node) {
3273                 pr_err("Invalid ibmebus device probed\n");
3274                 return -EINVAL;
3275         }
3276 
3277         adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3278         if (!adapter) {
3279                 ret = -ENOMEM;
3280                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3281                 goto out;
3282         }
3283 
3284         list_add(&adapter->list, &adapter_list);
3285 
3286         adapter->ofdev = dev;
3287 
3288         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3289                                          NULL);
3290         if (adapter_handle)
3291                 adapter->handle = *adapter_handle;
3292 
3293         if (!adapter->handle) {
3294                 dev_err(&dev->dev, "failed getting handle for adapter"
3295                         " '%s'\n", dev->dev.of_node->full_name);
3296                 ret = -ENODEV;
3297                 goto out_free_ad;
3298         }
3299 
3300         adapter->pd = EHEA_PD_ID;
3301 
3302         platform_set_drvdata(dev, adapter);
3303 
3304 
3305         /* initialize adapter and ports */
3306         /* get adapter properties */
3307         ret = ehea_sense_adapter_attr(adapter);
3308         if (ret) {
3309                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3310                 goto out_free_ad;
3311         }
3312 
3313         adapter->neq = ehea_create_eq(adapter,
3314                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3315         if (!adapter->neq) {
3316                 ret = -EIO;
3317                 dev_err(&dev->dev, "NEQ creation failed\n");
3318                 goto out_free_ad;
3319         }
3320 
3321         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3322                      (unsigned long)adapter);
3323 
3324         ret = ehea_create_device_sysfs(dev);
3325         if (ret)
3326                 goto out_kill_eq;
3327 
3328         ret = ehea_setup_ports(adapter);
3329         if (ret) {
3330                 dev_err(&dev->dev, "setup_ports failed\n");
3331                 goto out_rem_dev_sysfs;
3332         }
3333 
3334         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3335                                   ehea_interrupt_neq, 0,
3336                                   "ehea_neq", adapter);
3337         if (ret) {
3338                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3339                 goto out_shutdown_ports;
3340         }
3341 
3342         /* Handle any events that might be pending. */
3343         tasklet_hi_schedule(&adapter->neq_tasklet);
3344 
3345         ret = 0;
3346         goto out;
3347 
3348 out_shutdown_ports:
3349         for (i = 0; i < EHEA_MAX_PORTS; i++)
3350                 if (adapter->port[i]) {
3351                         ehea_shutdown_single_port(adapter->port[i]);
3352                         adapter->port[i] = NULL;
3353                 }
3354 
3355 out_rem_dev_sysfs:
3356         ehea_remove_device_sysfs(dev);
3357 
3358 out_kill_eq:
3359         ehea_destroy_eq(adapter->neq);
3360 
3361 out_free_ad:
3362         list_del(&adapter->list);
3363 
3364 out:
3365         ehea_update_firmware_handles();
3366 
3367         return ret;
3368 }
3369 
3370 static int ehea_remove(struct platform_device *dev)
3371 {
3372         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3373         int i;
3374 
3375         for (i = 0; i < EHEA_MAX_PORTS; i++)
3376                 if (adapter->port[i]) {
3377                         ehea_shutdown_single_port(adapter->port[i]);
3378                         adapter->port[i] = NULL;
3379                 }
3380 
3381         ehea_remove_device_sysfs(dev);
3382 
3383         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3384         tasklet_kill(&adapter->neq_tasklet);
3385 
3386         ehea_destroy_eq(adapter->neq);
3387         ehea_remove_adapter_mr(adapter);
3388         list_del(&adapter->list);
3389 
3390         ehea_update_firmware_handles();
3391 
3392         return 0;
3393 }
3394 
3395 static void ehea_crash_handler(void)
3396 {
3397         int i;
3398 
3399         if (ehea_fw_handles.arr)
3400                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3401                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3402                                              ehea_fw_handles.arr[i].fwh,
3403                                              FORCE_FREE);
3404 
3405         if (ehea_bcmc_regs.arr)
3406                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3407                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3408                                               ehea_bcmc_regs.arr[i].port_id,
3409                                               ehea_bcmc_regs.arr[i].reg_type,
3410                                               ehea_bcmc_regs.arr[i].macaddr,
3411                                               0, H_DEREG_BCMC);
3412 }
3413 
3414 static int ehea_mem_notifier(struct notifier_block *nb,
3415                              unsigned long action, void *data)
3416 {
3417         int ret = NOTIFY_BAD;
3418         struct memory_notify *arg = data;
3419 
3420         mutex_lock(&dlpar_mem_lock);
3421 
3422         switch (action) {
3423         case MEM_CANCEL_OFFLINE:
3424                 pr_info("memory offlining canceled");
3425                 /* Readd canceled memory block */
3426         case MEM_ONLINE:
3427                 pr_info("memory is going online");
3428                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3429                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3430                         goto out_unlock;
3431                 ehea_rereg_mrs();
3432                 break;
3433         case MEM_GOING_OFFLINE:
3434                 pr_info("memory is going offline");
3435                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3436                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3437                         goto out_unlock;
3438                 ehea_rereg_mrs();
3439                 break;
3440         default:
3441                 break;
3442         }
3443 
3444         ehea_update_firmware_handles();
3445         ret = NOTIFY_OK;
3446 
3447 out_unlock:
3448         mutex_unlock(&dlpar_mem_lock);
3449         return ret;
3450 }
3451 
3452 static struct notifier_block ehea_mem_nb = {
3453         .notifier_call = ehea_mem_notifier,
3454 };
3455 
3456 static int ehea_reboot_notifier(struct notifier_block *nb,
3457                                 unsigned long action, void *unused)
3458 {
3459         if (action == SYS_RESTART) {
3460                 pr_info("Reboot: freeing all eHEA resources\n");
3461                 ibmebus_unregister_driver(&ehea_driver);
3462         }
3463         return NOTIFY_DONE;
3464 }
3465 
3466 static struct notifier_block ehea_reboot_nb = {
3467         .notifier_call = ehea_reboot_notifier,
3468 };
3469 
3470 static int check_module_parm(void)
3471 {
3472         int ret = 0;
3473 
3474         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3475             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3476                 pr_info("Bad parameter: rq1_entries\n");
3477                 ret = -EINVAL;
3478         }
3479         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3480             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3481                 pr_info("Bad parameter: rq2_entries\n");
3482                 ret = -EINVAL;
3483         }
3484         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3485             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3486                 pr_info("Bad parameter: rq3_entries\n");
3487                 ret = -EINVAL;
3488         }
3489         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3490             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3491                 pr_info("Bad parameter: sq_entries\n");
3492                 ret = -EINVAL;
3493         }
3494 
3495         return ret;
3496 }
3497 
3498 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3499                                       char *buf)
3500 {
3501         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3502 }
3503 
3504 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3505                    ehea_show_capabilities, NULL);
3506 
3507 static int __init ehea_module_init(void)
3508 {
3509         int ret;
3510 
3511         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3512 
3513         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3514         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3515 
3516         mutex_init(&ehea_fw_handles.lock);
3517         spin_lock_init(&ehea_bcmc_regs.lock);
3518 
3519         ret = check_module_parm();
3520         if (ret)
3521                 goto out;
3522 
3523         ret = ehea_create_busmap();
3524         if (ret)
3525                 goto out;
3526 
3527         ret = register_reboot_notifier(&ehea_reboot_nb);
3528         if (ret)
3529                 pr_info("failed registering reboot notifier\n");
3530 
3531         ret = register_memory_notifier(&ehea_mem_nb);
3532         if (ret)
3533                 pr_info("failed registering memory remove notifier\n");
3534 
3535         ret = crash_shutdown_register(ehea_crash_handler);
3536         if (ret)
3537                 pr_info("failed registering crash handler\n");
3538 
3539         ret = ibmebus_register_driver(&ehea_driver);
3540         if (ret) {
3541                 pr_err("failed registering eHEA device driver on ebus\n");
3542                 goto out2;
3543         }
3544 
3545         ret = driver_create_file(&ehea_driver.driver,
3546                                  &driver_attr_capabilities);
3547         if (ret) {
3548                 pr_err("failed to register capabilities attribute, ret=%d\n",
3549                        ret);
3550                 goto out3;
3551         }
3552 
3553         return ret;
3554 
3555 out3:
3556         ibmebus_unregister_driver(&ehea_driver);
3557 out2:
3558         unregister_memory_notifier(&ehea_mem_nb);
3559         unregister_reboot_notifier(&ehea_reboot_nb);
3560         crash_shutdown_unregister(ehea_crash_handler);
3561 out:
3562         return ret;
3563 }
3564 
3565 static void __exit ehea_module_exit(void)
3566 {
3567         int ret;
3568 
3569         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3570         ibmebus_unregister_driver(&ehea_driver);
3571         unregister_reboot_notifier(&ehea_reboot_nb);
3572         ret = crash_shutdown_unregister(ehea_crash_handler);
3573         if (ret)
3574                 pr_info("failed unregistering crash handler\n");
3575         unregister_memory_notifier(&ehea_mem_nb);
3576         kfree(ehea_fw_handles.arr);
3577         kfree(ehea_bcmc_regs.arr);
3578         ehea_destroy_busmap();
3579 }
3580 
3581 module_init(ehea_module_init);
3582 module_exit(ehea_module_exit);
3583 

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