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ACPICA: New interfaces for table event handlers
[linux-2.6/mini2440.git] / drivers / net / ehea / ehea_main.c
blobf460b623c0771356acca11780e06b62efac2e0c4
1 /*
2 * linux/drivers/net/ehea/ehea_main.c
3 *
4 * eHEA ethernet device driver for IBM eServer System p
5 *
6 * (C) Copyright IBM Corp. 2006
7 *
8 * Authors:
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
12 *
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #include <linux/in.h>
30 #include <linux/ip.h>
31 #include <linux/tcp.h>
32 #include <linux/udp.h>
33 #include <linux/if.h>
34 #include <linux/list.h>
35 #include <linux/if_ether.h>
36 #include <linux/notifier.h>
37 #include <linux/reboot.h>
38 #include <asm/kexec.h>
39
40 #include <net/ip.h>
41
42 #include "ehea.h"
43 #include "ehea_qmr.h"
44 #include "ehea_phyp.h"
45
46
47 MODULE_LICENSE("GPL");
48 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
49 MODULE_DESCRIPTION("IBM eServer HEA Driver");
50 MODULE_VERSION(DRV_VERSION);
51
52
53 static int msg_level = -1;
54 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
55 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
56 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
57 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
58 static int use_mcs;
59 static int use_lro;
60 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
61 static int num_tx_qps = EHEA_NUM_TX_QP;
62 static int prop_carrier_state;
63
64 module_param(msg_level, int, 0);
65 module_param(rq1_entries, int, 0);
66 module_param(rq2_entries, int, 0);
67 module_param(rq3_entries, int, 0);
68 module_param(sq_entries, int, 0);
69 module_param(prop_carrier_state, int, 0);
70 module_param(use_mcs, int, 0);
71 module_param(use_lro, int, 0);
72 module_param(lro_max_aggr, int, 0);
73 module_param(num_tx_qps, int, 0);
74
75 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
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 = [6..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 = [6..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 = [6..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 = [6..14]. Default = "
90 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
91 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
92
93 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
94 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
95 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
96 "Default = 0");
97
98 static int port_name_cnt;
99 static LIST_HEAD(adapter_list);
100 u64 ehea_driver_flags;
101 struct work_struct ehea_rereg_mr_task;
102 struct semaphore dlpar_mem_lock;
103 struct ehea_fw_handle_array ehea_fw_handles;
104 struct ehea_bcmc_reg_array ehea_bcmc_regs;
105
106
107 static int __devinit ehea_probe_adapter(struct of_device *dev,
108 const struct of_device_id *id);
109
110 static int __devexit ehea_remove(struct of_device *dev);
111
112 static struct of_device_id ehea_device_table[] = {
113 {
114 .name = "lhea",
115 .compatible = "IBM,lhea",
116 },
117 {},
118 };
119
120 static struct of_platform_driver ehea_driver = {
121 .name = "ehea",
122 .match_table = ehea_device_table,
123 .probe = ehea_probe_adapter,
124 .remove = ehea_remove,
125 };
126
127 void ehea_dump(void *adr, int len, char *msg)
128 {
129 int x;
130 unsigned char *deb = adr;
131 for (x = 0; x < len; x += 16) {
132 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
133 deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
134 deb += 16;
135 }
136 }
137
138 static void ehea_update_firmware_handles(void)
139 {
140 struct ehea_fw_handle_entry *arr = NULL;
141 struct ehea_adapter *adapter;
142 int num_adapters = 0;
143 int num_ports = 0;
144 int num_portres = 0;
145 int i = 0;
146 int num_fw_handles, k, l;
147
148 /* Determine number of handles */
149 list_for_each_entry(adapter, &adapter_list, list) {
150 num_adapters++;
151
152 for (k = 0; k < EHEA_MAX_PORTS; k++) {
153 struct ehea_port *port = adapter->port[k];
154
155 if (!port || (port->state != EHEA_PORT_UP))
156 continue;
157
158 num_ports++;
159 num_portres += port->num_def_qps + port->num_add_tx_qps;
160 }
161 }
162
163 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
164 num_ports * EHEA_NUM_PORT_FW_HANDLES +
165 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
166
167 if (num_fw_handles) {
168 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
169 if (!arr)
170 return; /* Keep the existing array */
171 } else
172 goto out_update;
173
174 list_for_each_entry(adapter, &adapter_list, list) {
175 for (k = 0; k < EHEA_MAX_PORTS; k++) {
176 struct ehea_port *port = adapter->port[k];
177
178 if (!port || (port->state != EHEA_PORT_UP))
179 continue;
180
181 for (l = 0;
182 l < port->num_def_qps + port->num_add_tx_qps;
183 l++) {
184 struct ehea_port_res *pr = &port->port_res[l];
185
186 arr[i].adh = adapter->handle;
187 arr[i++].fwh = pr->qp->fw_handle;
188 arr[i].adh = adapter->handle;
189 arr[i++].fwh = pr->send_cq->fw_handle;
190 arr[i].adh = adapter->handle;
191 arr[i++].fwh = pr->recv_cq->fw_handle;
192 arr[i].adh = adapter->handle;
193 arr[i++].fwh = pr->eq->fw_handle;
194 arr[i].adh = adapter->handle;
195 arr[i++].fwh = pr->send_mr.handle;
196 arr[i].adh = adapter->handle;
197 arr[i++].fwh = pr->recv_mr.handle;
198 }
199 arr[i].adh = adapter->handle;
200 arr[i++].fwh = port->qp_eq->fw_handle;
201 }
202
203 arr[i].adh = adapter->handle;
204 arr[i++].fwh = adapter->neq->fw_handle;
205
206 if (adapter->mr.handle) {
207 arr[i].adh = adapter->handle;
208 arr[i++].fwh = adapter->mr.handle;
209 }
210 }
211
212 out_update:
213 kfree(ehea_fw_handles.arr);
214 ehea_fw_handles.arr = arr;
215 ehea_fw_handles.num_entries = i;
216 }
217
218 static void ehea_update_bcmc_registrations(void)
219 {
220 struct ehea_bcmc_reg_entry *arr = NULL;
221 struct ehea_adapter *adapter;
222 struct ehea_mc_list *mc_entry;
223 int num_registrations = 0;
224 int i = 0;
225 int k;
226
227 /* Determine number of registrations */
228 list_for_each_entry(adapter, &adapter_list, list)
229 for (k = 0; k < EHEA_MAX_PORTS; k++) {
230 struct ehea_port *port = adapter->port[k];
231
232 if (!port || (port->state != EHEA_PORT_UP))
233 continue;
234
235 num_registrations += 2; /* Broadcast registrations */
236
237 list_for_each_entry(mc_entry, &port->mc_list->list,list)
238 num_registrations += 2;
239 }
240
241 if (num_registrations) {
242 arr = kzalloc(num_registrations * sizeof(*arr), GFP_KERNEL);
243 if (!arr)
244 return; /* Keep the existing array */
245 } else
246 goto out_update;
247
248 list_for_each_entry(adapter, &adapter_list, list) {
249 for (k = 0; k < EHEA_MAX_PORTS; k++) {
250 struct ehea_port *port = adapter->port[k];
251
252 if (!port || (port->state != EHEA_PORT_UP))
253 continue;
254
255 arr[i].adh = adapter->handle;
256 arr[i].port_id = port->logical_port_id;
257 arr[i].reg_type = EHEA_BCMC_BROADCAST |
258 EHEA_BCMC_UNTAGGED;
259 arr[i++].macaddr = port->mac_addr;
260
261 arr[i].adh = adapter->handle;
262 arr[i].port_id = port->logical_port_id;
263 arr[i].reg_type = EHEA_BCMC_BROADCAST |
264 EHEA_BCMC_VLANID_ALL;
265 arr[i++].macaddr = port->mac_addr;
266
267 list_for_each_entry(mc_entry,
268 &port->mc_list->list, list) {
269 arr[i].adh = adapter->handle;
270 arr[i].port_id = port->logical_port_id;
271 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
272 EHEA_BCMC_MULTICAST |
273 EHEA_BCMC_UNTAGGED;
274 arr[i++].macaddr = mc_entry->macaddr;
275
276 arr[i].adh = adapter->handle;
277 arr[i].port_id = port->logical_port_id;
278 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
279 EHEA_BCMC_MULTICAST |
280 EHEA_BCMC_VLANID_ALL;
281 arr[i++].macaddr = mc_entry->macaddr;
282 }
283 }
284 }
285
286 out_update:
287 kfree(ehea_bcmc_regs.arr);
288 ehea_bcmc_regs.arr = arr;
289 ehea_bcmc_regs.num_entries = i;
290 }
291
292 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
293 {
294 struct ehea_port *port = netdev_priv(dev);
295 struct net_device_stats *stats = &port->stats;
296 struct hcp_ehea_port_cb2 *cb2;
297 u64 hret, rx_packets, tx_packets;
298 int i;
299
300 memset(stats, 0, sizeof(*stats));
301
302 cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
303 if (!cb2) {
304 ehea_error("no mem for cb2");
305 goto out;
306 }
307
308 hret = ehea_h_query_ehea_port(port->adapter->handle,
309 port->logical_port_id,
310 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
311 if (hret != H_SUCCESS) {
312 ehea_error("query_ehea_port failed");
313 goto out_herr;
314 }
315
316 if (netif_msg_hw(port))
317 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
318
319 rx_packets = 0;
320 for (i = 0; i < port->num_def_qps; i++)
321 rx_packets += port->port_res[i].rx_packets;
322
323 tx_packets = 0;
324 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
325 tx_packets += port->port_res[i].tx_packets;
326
327 stats->tx_packets = tx_packets;
328 stats->multicast = cb2->rxmcp;
329 stats->rx_errors = cb2->rxuerr;
330 stats->rx_bytes = cb2->rxo;
331 stats->tx_bytes = cb2->txo;
332 stats->rx_packets = rx_packets;
333
334 out_herr:
335 kfree(cb2);
336 out:
337 return stats;
338 }
339
340 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
341 {
342 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
343 struct net_device *dev = pr->port->netdev;
344 int max_index_mask = pr->rq1_skba.len - 1;
345 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
346 int adder = 0;
347 int i;
348
349 pr->rq1_skba.os_skbs = 0;
350
351 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
352 if (nr_of_wqes > 0)
353 pr->rq1_skba.index = index;
354 pr->rq1_skba.os_skbs = fill_wqes;
355 return;
356 }
357
358 for (i = 0; i < fill_wqes; i++) {
359 if (!skb_arr_rq1[index]) {
360 skb_arr_rq1[index] = netdev_alloc_skb(dev,
361 EHEA_L_PKT_SIZE);
362 if (!skb_arr_rq1[index]) {
363 pr->rq1_skba.os_skbs = fill_wqes - i;
364 ehea_error("%s: no mem for skb/%d wqes filled",
365 dev->name, i);
366 break;
367 }
368 }
369 index--;
370 index &= max_index_mask;
371 adder++;
372 }
373
374 if (adder == 0)
375 return;
376
377 /* Ring doorbell */
378 ehea_update_rq1a(pr->qp, adder);
379 }
380
381 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
382 {
383 int ret = 0;
384 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
385 struct net_device *dev = pr->port->netdev;
386 int i;
387
388 for (i = 0; i < pr->rq1_skba.len; i++) {
389 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
390 if (!skb_arr_rq1[i]) {
391 ehea_error("%s: no mem for skb/%d wqes filled",
392 dev->name, i);
393 ret = -ENOMEM;
394 goto out;
395 }
396 }
397 /* Ring doorbell */
398 ehea_update_rq1a(pr->qp, nr_rq1a);
399 out:
400 return ret;
401 }
402
403 static int ehea_refill_rq_def(struct ehea_port_res *pr,
404 struct ehea_q_skb_arr *q_skba, int rq_nr,
405 int num_wqes, int wqe_type, int packet_size)
406 {
407 struct net_device *dev = pr->port->netdev;
408 struct ehea_qp *qp = pr->qp;
409 struct sk_buff **skb_arr = q_skba->arr;
410 struct ehea_rwqe *rwqe;
411 int i, index, max_index_mask, fill_wqes;
412 int adder = 0;
413 int ret = 0;
414
415 fill_wqes = q_skba->os_skbs + num_wqes;
416 q_skba->os_skbs = 0;
417
418 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
419 q_skba->os_skbs = fill_wqes;
420 return ret;
421 }
422
423 index = q_skba->index;
424 max_index_mask = q_skba->len - 1;
425 for (i = 0; i < fill_wqes; i++) {
426 u64 tmp_addr;
427 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
428 if (!skb) {
429 ehea_error("%s: no mem for skb/%d wqes filled",
430 pr->port->netdev->name, i);
431 q_skba->os_skbs = fill_wqes - i;
432 ret = -ENOMEM;
433 break;
434 }
435 skb_reserve(skb, NET_IP_ALIGN);
436
437 skb_arr[index] = skb;
438 tmp_addr = ehea_map_vaddr(skb->data);
439 if (tmp_addr == -1) {
440 dev_kfree_skb(skb);
441 q_skba->os_skbs = fill_wqes - i;
442 ret = 0;
443 break;
444 }
445
446 rwqe = ehea_get_next_rwqe(qp, rq_nr);
447 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
448 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
449 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
450 rwqe->sg_list[0].vaddr = tmp_addr;
451 rwqe->sg_list[0].len = packet_size;
452 rwqe->data_segments = 1;
453
454 index++;
455 index &= max_index_mask;
456 adder++;
457 }
458
459 q_skba->index = index;
460 if (adder == 0)
461 goto out;
462
463 /* Ring doorbell */
464 iosync();
465 if (rq_nr == 2)
466 ehea_update_rq2a(pr->qp, adder);
467 else
468 ehea_update_rq3a(pr->qp, adder);
469 out:
470 return ret;
471 }
472
473
474 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
475 {
476 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
477 nr_of_wqes, EHEA_RWQE2_TYPE,
478 EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
479 }
480
481
482 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
483 {
484 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
485 nr_of_wqes, EHEA_RWQE3_TYPE,
486 EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
487 }
488
489 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
490 {
491 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
492 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
493 return 0;
494 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
495 (cqe->header_length == 0))
496 return 0;
497 return -EINVAL;
498 }
499
500 static inline void ehea_fill_skb(struct net_device *dev,
501 struct sk_buff *skb, struct ehea_cqe *cqe)
502 {
503 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
504
505 skb_put(skb, length);
506 skb->ip_summed = CHECKSUM_UNNECESSARY;
507 skb->protocol = eth_type_trans(skb, dev);
508 }
509
510 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
511 int arr_len,
512 struct ehea_cqe *cqe)
513 {
514 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
515 struct sk_buff *skb;
516 void *pref;
517 int x;
518
519 x = skb_index + 1;
520 x &= (arr_len - 1);
521
522 pref = skb_array[x];
523 prefetchw(pref);
524 prefetchw(pref + EHEA_CACHE_LINE);
525
526 pref = (skb_array[x]->data);
527 prefetch(pref);
528 prefetch(pref + EHEA_CACHE_LINE);
529 prefetch(pref + EHEA_CACHE_LINE * 2);
530 prefetch(pref + EHEA_CACHE_LINE * 3);
531 skb = skb_array[skb_index];
532 skb_array[skb_index] = NULL;
533 return skb;
534 }
535
536 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
537 int arr_len, int wqe_index)
538 {
539 struct sk_buff *skb;
540 void *pref;
541 int x;
542
543 x = wqe_index + 1;
544 x &= (arr_len - 1);
545
546 pref = skb_array[x];
547 prefetchw(pref);
548 prefetchw(pref + EHEA_CACHE_LINE);
549
550 pref = (skb_array[x]->data);
551 prefetchw(pref);
552 prefetchw(pref + EHEA_CACHE_LINE);
553
554 skb = skb_array[wqe_index];
555 skb_array[wqe_index] = NULL;
556 return skb;
557 }
558
559 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
560 struct ehea_cqe *cqe, int *processed_rq2,
561 int *processed_rq3)
562 {
563 struct sk_buff *skb;
564
565 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
566 pr->p_stats.err_tcp_cksum++;
567 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
568 pr->p_stats.err_ip_cksum++;
569 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
570 pr->p_stats.err_frame_crc++;
571
572 if (rq == 2) {
573 *processed_rq2 += 1;
574 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
575 dev_kfree_skb(skb);
576 } else if (rq == 3) {
577 *processed_rq3 += 1;
578 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
579 dev_kfree_skb(skb);
580 }
581
582 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
583 if (netif_msg_rx_err(pr->port)) {
584 ehea_error("Critical receive error for QP %d. "
585 "Resetting port.", pr->qp->init_attr.qp_nr);
586 ehea_dump(cqe, sizeof(*cqe), "CQE");
587 }
588 schedule_work(&pr->port->reset_task);
589 return 1;
590 }
591
592 return 0;
593 }
594
595 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
596 void **tcph, u64 *hdr_flags, void *priv)
597 {
598 struct ehea_cqe *cqe = priv;
599 unsigned int ip_len;
600 struct iphdr *iph;
601
602 /* non tcp/udp packets */
603 if (!cqe->header_length)
604 return -1;
605
606 /* non tcp packet */
607 skb_reset_network_header(skb);
608 iph = ip_hdr(skb);
609 if (iph->protocol != IPPROTO_TCP)
610 return -1;
611
612 ip_len = ip_hdrlen(skb);
613 skb_set_transport_header(skb, ip_len);
614 *tcph = tcp_hdr(skb);
615
616 /* check if ip header and tcp header are complete */
617 if (iph->tot_len < ip_len + tcp_hdrlen(skb))
618 return -1;
619
620 *hdr_flags = LRO_IPV4 | LRO_TCP;
621 *iphdr = iph;
622
623 return 0;
624 }
625
626 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
627 struct sk_buff *skb)
628 {
629 int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
630 && pr->port->vgrp;
631
632 if (use_lro) {
633 if (vlan_extracted)
634 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
635 pr->port->vgrp,
636 cqe->vlan_tag,
637 cqe);
638 else
639 lro_receive_skb(&pr->lro_mgr, skb, cqe);
640 } else {
641 if (vlan_extracted)
642 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
643 cqe->vlan_tag);
644 else
645 netif_receive_skb(skb);
646 }
647 }
648
649 static int ehea_proc_rwqes(struct net_device *dev,
650 struct ehea_port_res *pr,
651 int budget)
652 {
653 struct ehea_port *port = pr->port;
654 struct ehea_qp *qp = pr->qp;
655 struct ehea_cqe *cqe;
656 struct sk_buff *skb;
657 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
658 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
659 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
660 int skb_arr_rq1_len = pr->rq1_skba.len;
661 int skb_arr_rq2_len = pr->rq2_skba.len;
662 int skb_arr_rq3_len = pr->rq3_skba.len;
663 int processed, processed_rq1, processed_rq2, processed_rq3;
664 int wqe_index, last_wqe_index, rq, port_reset;
665
666 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
667 last_wqe_index = 0;
668
669 cqe = ehea_poll_rq1(qp, &wqe_index);
670 while ((processed < budget) && cqe) {
671 ehea_inc_rq1(qp);
672 processed_rq1++;
673 processed++;
674 if (netif_msg_rx_status(port))
675 ehea_dump(cqe, sizeof(*cqe), "CQE");
676
677 last_wqe_index = wqe_index;
678 rmb();
679 if (!ehea_check_cqe(cqe, &rq)) {
680 if (rq == 1) {
681 /* LL RQ1 */
682 skb = get_skb_by_index_ll(skb_arr_rq1,
683 skb_arr_rq1_len,
684 wqe_index);
685 if (unlikely(!skb)) {
686 if (netif_msg_rx_err(port))
687 ehea_error("LL rq1: skb=NULL");
688
689 skb = netdev_alloc_skb(dev,
690 EHEA_L_PKT_SIZE);
691 if (!skb)
692 break;
693 }
694 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
695 cqe->num_bytes_transfered - 4);
696 ehea_fill_skb(dev, skb, cqe);
697 } else if (rq == 2) {
698 /* RQ2 */
699 skb = get_skb_by_index(skb_arr_rq2,
700 skb_arr_rq2_len, cqe);
701 if (unlikely(!skb)) {
702 if (netif_msg_rx_err(port))
703 ehea_error("rq2: skb=NULL");
704 break;
705 }
706 ehea_fill_skb(dev, skb, cqe);
707 processed_rq2++;
708 } else {
709 /* RQ3 */
710 skb = get_skb_by_index(skb_arr_rq3,
711 skb_arr_rq3_len, cqe);
712 if (unlikely(!skb)) {
713 if (netif_msg_rx_err(port))
714 ehea_error("rq3: skb=NULL");
715 break;
716 }
717 ehea_fill_skb(dev, skb, cqe);
718 processed_rq3++;
719 }
720
721 ehea_proc_skb(pr, cqe, skb);
722 dev->last_rx = jiffies;
723 } else {
724 pr->p_stats.poll_receive_errors++;
725 port_reset = ehea_treat_poll_error(pr, rq, cqe,
726 &processed_rq2,
727 &processed_rq3);
728 if (port_reset)
729 break;
730 }
731 cqe = ehea_poll_rq1(qp, &wqe_index);
732 }
733 if (use_lro)
734 lro_flush_all(&pr->lro_mgr);
735
736 pr->rx_packets += processed;
737
738 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
739 ehea_refill_rq2(pr, processed_rq2);
740 ehea_refill_rq3(pr, processed_rq3);
741
742 return processed;
743 }
744
745 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
746 {
747 struct sk_buff *skb;
748 struct ehea_cq *send_cq = pr->send_cq;
749 struct ehea_cqe *cqe;
750 int quota = my_quota;
751 int cqe_counter = 0;
752 int swqe_av = 0;
753 int index;
754 unsigned long flags;
755
756 cqe = ehea_poll_cq(send_cq);
757 while (cqe && (quota > 0)) {
758 ehea_inc_cq(send_cq);
759
760 cqe_counter++;
761 rmb();
762 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
763 ehea_error("Send Completion Error: Resetting port");
764 if (netif_msg_tx_err(pr->port))
765 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
766 schedule_work(&pr->port->reset_task);
767 break;
768 }
769
770 if (netif_msg_tx_done(pr->port))
771 ehea_dump(cqe, sizeof(*cqe), "CQE");
772
773 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
774 == EHEA_SWQE2_TYPE)) {
775
776 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
777 skb = pr->sq_skba.arr[index];
778 dev_kfree_skb(skb);
779 pr->sq_skba.arr[index] = NULL;
780 }
781
782 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
783 quota--;
784
785 cqe = ehea_poll_cq(send_cq);
786 };
787
788 ehea_update_feca(send_cq, cqe_counter);
789 atomic_add(swqe_av, &pr->swqe_avail);
790
791 spin_lock_irqsave(&pr->netif_queue, flags);
792
793 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
794 >= pr->swqe_refill_th)) {
795 netif_wake_queue(pr->port->netdev);
796 pr->queue_stopped = 0;
797 }
798 spin_unlock_irqrestore(&pr->netif_queue, flags);
799
800 return cqe;
801 }
802
803 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
804 #define EHEA_POLL_MAX_CQES 65535
805
806 static int ehea_poll(struct napi_struct *napi, int budget)
807 {
808 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
809 napi);
810 struct net_device *dev = pr->port->netdev;
811 struct ehea_cqe *cqe;
812 struct ehea_cqe *cqe_skb = NULL;
813 int force_irq, wqe_index;
814 int rx = 0;
815
816 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
817 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
818
819 if (!force_irq)
820 rx += ehea_proc_rwqes(dev, pr, budget - rx);
821
822 while ((rx != budget) || force_irq) {
823 pr->poll_counter = 0;
824 force_irq = 0;
825 netif_rx_complete(dev, napi);
826 ehea_reset_cq_ep(pr->recv_cq);
827 ehea_reset_cq_ep(pr->send_cq);
828 ehea_reset_cq_n1(pr->recv_cq);
829 ehea_reset_cq_n1(pr->send_cq);
830 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
831 cqe_skb = ehea_poll_cq(pr->send_cq);
832
833 if (!cqe && !cqe_skb)
834 return rx;
835
836 if (!netif_rx_reschedule(dev, napi))
837 return rx;
838
839 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
840 rx += ehea_proc_rwqes(dev, pr, budget - rx);
841 }
842
843 pr->poll_counter++;
844 return rx;
845 }
846
847 #ifdef CONFIG_NET_POLL_CONTROLLER
848 static void ehea_netpoll(struct net_device *dev)
849 {
850 struct ehea_port *port = netdev_priv(dev);
851 int i;
852
853 for (i = 0; i < port->num_def_qps; i++)
854 netif_rx_schedule(dev, &port->port_res[i].napi);
855 }
856 #endif
857
858 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
859 {
860 struct ehea_port_res *pr = param;
861
862 netif_rx_schedule(pr->port->netdev, &pr->napi);
863
864 return IRQ_HANDLED;
865 }
866
867 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
868 {
869 struct ehea_port *port = param;
870 struct ehea_eqe *eqe;
871 struct ehea_qp *qp;
872 u32 qp_token;
873
874 eqe = ehea_poll_eq(port->qp_eq);
875
876 while (eqe) {
877 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
878 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
879 eqe->entry, qp_token);
880
881 qp = port->port_res[qp_token].qp;
882 ehea_error_data(port->adapter, qp->fw_handle);
883 eqe = ehea_poll_eq(port->qp_eq);
884 }
885
886 schedule_work(&port->reset_task);
887
888 return IRQ_HANDLED;
889 }
890
891 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
892 int logical_port)
893 {
894 int i;
895
896 for (i = 0; i < EHEA_MAX_PORTS; i++)
897 if (adapter->port[i])
898 if (adapter->port[i]->logical_port_id == logical_port)
899 return adapter->port[i];
900 return NULL;
901 }
902
903 int ehea_sense_port_attr(struct ehea_port *port)
904 {
905 int ret;
906 u64 hret;
907 struct hcp_ehea_port_cb0 *cb0;
908
909 /* may be called via ehea_neq_tasklet() */
910 cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
911 if (!cb0) {
912 ehea_error("no mem for cb0");
913 ret = -ENOMEM;
914 goto out;
915 }
916
917 hret = ehea_h_query_ehea_port(port->adapter->handle,
918 port->logical_port_id, H_PORT_CB0,
919 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
920 cb0);
921 if (hret != H_SUCCESS) {
922 ret = -EIO;
923 goto out_free;
924 }
925
926 /* MAC address */
927 port->mac_addr = cb0->port_mac_addr << 16;
928
929 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
930 ret = -EADDRNOTAVAIL;
931 goto out_free;
932 }
933
934 /* Port speed */
935 switch (cb0->port_speed) {
936 case H_SPEED_10M_H:
937 port->port_speed = EHEA_SPEED_10M;
938 port->full_duplex = 0;
939 break;
940 case H_SPEED_10M_F:
941 port->port_speed = EHEA_SPEED_10M;
942 port->full_duplex = 1;
943 break;
944 case H_SPEED_100M_H:
945 port->port_speed = EHEA_SPEED_100M;
946 port->full_duplex = 0;
947 break;
948 case H_SPEED_100M_F:
949 port->port_speed = EHEA_SPEED_100M;
950 port->full_duplex = 1;
951 break;
952 case H_SPEED_1G_F:
953 port->port_speed = EHEA_SPEED_1G;
954 port->full_duplex = 1;
955 break;
956 case H_SPEED_10G_F:
957 port->port_speed = EHEA_SPEED_10G;
958 port->full_duplex = 1;
959 break;
960 default:
961 port->port_speed = 0;
962 port->full_duplex = 0;
963 break;
964 }
965
966 port->autoneg = 1;
967 port->num_mcs = cb0->num_default_qps;
968
969 /* Number of default QPs */
970 if (use_mcs)
971 port->num_def_qps = cb0->num_default_qps;
972 else
973 port->num_def_qps = 1;
974
975 if (!port->num_def_qps) {
976 ret = -EINVAL;
977 goto out_free;
978 }
979
980 port->num_tx_qps = num_tx_qps;
981
982 if (port->num_def_qps >= port->num_tx_qps)
983 port->num_add_tx_qps = 0;
984 else
985 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
986
987 ret = 0;
988 out_free:
989 if (ret || netif_msg_probe(port))
990 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
991 kfree(cb0);
992 out:
993 return ret;
994 }
995
996 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
997 {
998 struct hcp_ehea_port_cb4 *cb4;
999 u64 hret;
1000 int ret = 0;
1001
1002 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1003 if (!cb4) {
1004 ehea_error("no mem for cb4");
1005 ret = -ENOMEM;
1006 goto out;
1007 }
1008
1009 cb4->port_speed = port_speed;
1010
1011 netif_carrier_off(port->netdev);
1012
1013 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1014 port->logical_port_id,
1015 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1016 if (hret == H_SUCCESS) {
1017 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1018
1019 hret = ehea_h_query_ehea_port(port->adapter->handle,
1020 port->logical_port_id,
1021 H_PORT_CB4, H_PORT_CB4_SPEED,
1022 cb4);
1023 if (hret == H_SUCCESS) {
1024 switch (cb4->port_speed) {
1025 case H_SPEED_10M_H:
1026 port->port_speed = EHEA_SPEED_10M;
1027 port->full_duplex = 0;
1028 break;
1029 case H_SPEED_10M_F:
1030 port->port_speed = EHEA_SPEED_10M;
1031 port->full_duplex = 1;
1032 break;
1033 case H_SPEED_100M_H:
1034 port->port_speed = EHEA_SPEED_100M;
1035 port->full_duplex = 0;
1036 break;
1037 case H_SPEED_100M_F:
1038 port->port_speed = EHEA_SPEED_100M;
1039 port->full_duplex = 1;
1040 break;
1041 case H_SPEED_1G_F:
1042 port->port_speed = EHEA_SPEED_1G;
1043 port->full_duplex = 1;
1044 break;
1045 case H_SPEED_10G_F:
1046 port->port_speed = EHEA_SPEED_10G;
1047 port->full_duplex = 1;
1048 break;
1049 default:
1050 port->port_speed = 0;
1051 port->full_duplex = 0;
1052 break;
1053 }
1054 } else {
1055 ehea_error("Failed sensing port speed");
1056 ret = -EIO;
1057 }
1058 } else {
1059 if (hret == H_AUTHORITY) {
1060 ehea_info("Hypervisor denied setting port speed");
1061 ret = -EPERM;
1062 } else {
1063 ret = -EIO;
1064 ehea_error("Failed setting port speed");
1065 }
1066 }
1067 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1068 netif_carrier_on(port->netdev);
1069
1070 kfree(cb4);
1071 out:
1072 return ret;
1073 }
1074
1075 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1076 {
1077 int ret;
1078 u8 ec;
1079 u8 portnum;
1080 struct ehea_port *port;
1081
1082 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1083 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1084 port = ehea_get_port(adapter, portnum);
1085
1086 switch (ec) {
1087 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1088
1089 if (!port) {
1090 ehea_error("unknown portnum %x", portnum);
1091 break;
1092 }
1093
1094 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1095 if (!netif_carrier_ok(port->netdev)) {
1096 ret = ehea_sense_port_attr(port);
1097 if (ret) {
1098 ehea_error("failed resensing port "
1099 "attributes");
1100 break;
1101 }
1102
1103 if (netif_msg_link(port))
1104 ehea_info("%s: Logical port up: %dMbps "
1105 "%s Duplex",
1106 port->netdev->name,
1107 port->port_speed,
1108 port->full_duplex ==
1109 1 ? "Full" : "Half");
1110
1111 netif_carrier_on(port->netdev);
1112 netif_wake_queue(port->netdev);
1113 }
1114 } else
1115 if (netif_carrier_ok(port->netdev)) {
1116 if (netif_msg_link(port))
1117 ehea_info("%s: Logical port down",
1118 port->netdev->name);
1119 netif_carrier_off(port->netdev);
1120 netif_stop_queue(port->netdev);
1121 }
1122
1123 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1124 port->phy_link = EHEA_PHY_LINK_UP;
1125 if (netif_msg_link(port))
1126 ehea_info("%s: Physical port up",
1127 port->netdev->name);
1128 if (prop_carrier_state)
1129 netif_carrier_on(port->netdev);
1130 } else {
1131 port->phy_link = EHEA_PHY_LINK_DOWN;
1132 if (netif_msg_link(port))
1133 ehea_info("%s: Physical port down",
1134 port->netdev->name);
1135 if (prop_carrier_state)
1136 netif_carrier_off(port->netdev);
1137 }
1138
1139 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1140 ehea_info("External switch port is primary port");
1141 else
1142 ehea_info("External switch port is backup port");
1143
1144 break;
1145 case EHEA_EC_ADAPTER_MALFUNC:
1146 ehea_error("Adapter malfunction");
1147 break;
1148 case EHEA_EC_PORT_MALFUNC:
1149 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1150 netif_carrier_off(port->netdev);
1151 netif_stop_queue(port->netdev);
1152 break;
1153 default:
1154 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
1155 break;
1156 }
1157 }
1158
1159 static void ehea_neq_tasklet(unsigned long data)
1160 {
1161 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1162 struct ehea_eqe *eqe;
1163 u64 event_mask;
1164
1165 eqe = ehea_poll_eq(adapter->neq);
1166 ehea_debug("eqe=%p", eqe);
1167
1168 while (eqe) {
1169 ehea_debug("*eqe=%lx", eqe->entry);
1170 ehea_parse_eqe(adapter, eqe->entry);
1171 eqe = ehea_poll_eq(adapter->neq);
1172 ehea_debug("next eqe=%p", eqe);
1173 }
1174
1175 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1176 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1177 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1178
1179 ehea_h_reset_events(adapter->handle,
1180 adapter->neq->fw_handle, event_mask);
1181 }
1182
1183 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1184 {
1185 struct ehea_adapter *adapter = param;
1186 tasklet_hi_schedule(&adapter->neq_tasklet);
1187 return IRQ_HANDLED;
1188 }
1189
1190
1191 static int ehea_fill_port_res(struct ehea_port_res *pr)
1192 {
1193 int ret;
1194 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1195
1196 ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1197 - init_attr->act_nr_rwqes_rq2
1198 - init_attr->act_nr_rwqes_rq3 - 1);
1199
1200 ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1201
1202 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1203
1204 return ret;
1205 }
1206
1207 static int ehea_reg_interrupts(struct net_device *dev)
1208 {
1209 struct ehea_port *port = netdev_priv(dev);
1210 struct ehea_port_res *pr;
1211 int i, ret;
1212
1213
1214 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1215 dev->name);
1216
1217 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1218 ehea_qp_aff_irq_handler,
1219 IRQF_DISABLED, port->int_aff_name, port);
1220 if (ret) {
1221 ehea_error("failed registering irq for qp_aff_irq_handler:"
1222 "ist=%X", port->qp_eq->attr.ist1);
1223 goto out_free_qpeq;
1224 }
1225
1226 if (netif_msg_ifup(port))
1227 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1228 "registered", port->qp_eq->attr.ist1);
1229
1230
1231 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1232 pr = &port->port_res[i];
1233 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1234 "%s-queue%d", dev->name, i);
1235 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1236 ehea_recv_irq_handler,
1237 IRQF_DISABLED, pr->int_send_name,
1238 pr);
1239 if (ret) {
1240 ehea_error("failed registering irq for ehea_queue "
1241 "port_res_nr:%d, ist=%X", i,
1242 pr->eq->attr.ist1);
1243 goto out_free_req;
1244 }
1245 if (netif_msg_ifup(port))
1246 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1247 "%d registered", pr->eq->attr.ist1, i);
1248 }
1249 out:
1250 return ret;
1251
1252
1253 out_free_req:
1254 while (--i >= 0) {
1255 u32 ist = port->port_res[i].eq->attr.ist1;
1256 ibmebus_free_irq(ist, &port->port_res[i]);
1257 }
1258
1259 out_free_qpeq:
1260 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1261 i = port->num_def_qps;
1262
1263 goto out;
1264
1265 }
1266
1267 static void ehea_free_interrupts(struct net_device *dev)
1268 {
1269 struct ehea_port *port = netdev_priv(dev);
1270 struct ehea_port_res *pr;
1271 int i;
1272
1273 /* send */
1274
1275 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1276 pr = &port->port_res[i];
1277 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1278 if (netif_msg_intr(port))
1279 ehea_info("free send irq for res %d with handle 0x%X",
1280 i, pr->eq->attr.ist1);
1281 }
1282
1283 /* associated events */
1284 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1285 if (netif_msg_intr(port))
1286 ehea_info("associated event interrupt for handle 0x%X freed",
1287 port->qp_eq->attr.ist1);
1288 }
1289
1290 static int ehea_configure_port(struct ehea_port *port)
1291 {
1292 int ret, i;
1293 u64 hret, mask;
1294 struct hcp_ehea_port_cb0 *cb0;
1295
1296 ret = -ENOMEM;
1297 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1298 if (!cb0)
1299 goto out;
1300
1301 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1302 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1303 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1304 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1305 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1306 PXLY_RC_VLAN_FILTER)
1307 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1308
1309 for (i = 0; i < port->num_mcs; i++)
1310 if (use_mcs)
1311 cb0->default_qpn_arr[i] =
1312 port->port_res[i].qp->init_attr.qp_nr;
1313 else
1314 cb0->default_qpn_arr[i] =
1315 port->port_res[0].qp->init_attr.qp_nr;
1316
1317 if (netif_msg_ifup(port))
1318 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1319
1320 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1321 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1322
1323 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1324 port->logical_port_id,
1325 H_PORT_CB0, mask, cb0);
1326 ret = -EIO;
1327 if (hret != H_SUCCESS)
1328 goto out_free;
1329
1330 ret = 0;
1331
1332 out_free:
1333 kfree(cb0);
1334 out:
1335 return ret;
1336 }
1337
1338 int ehea_gen_smrs(struct ehea_port_res *pr)
1339 {
1340 int ret;
1341 struct ehea_adapter *adapter = pr->port->adapter;
1342
1343 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1344 if (ret)
1345 goto out;
1346
1347 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1348 if (ret)
1349 goto out_free;
1350
1351 return 0;
1352
1353 out_free:
1354 ehea_rem_mr(&pr->send_mr);
1355 out:
1356 ehea_error("Generating SMRS failed\n");
1357 return -EIO;
1358 }
1359
1360 int ehea_rem_smrs(struct ehea_port_res *pr)
1361 {
1362 if ((ehea_rem_mr(&pr->send_mr))
1363 || (ehea_rem_mr(&pr->recv_mr)))
1364 return -EIO;
1365 else
1366 return 0;
1367 }
1368
1369 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1370 {
1371 int arr_size = sizeof(void *) * max_q_entries;
1372
1373 q_skba->arr = vmalloc(arr_size);
1374 if (!q_skba->arr)
1375 return -ENOMEM;
1376
1377 memset(q_skba->arr, 0, arr_size);
1378
1379 q_skba->len = max_q_entries;
1380 q_skba->index = 0;
1381 q_skba->os_skbs = 0;
1382
1383 return 0;
1384 }
1385
1386 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1387 struct port_res_cfg *pr_cfg, int queue_token)
1388 {
1389 struct ehea_adapter *adapter = port->adapter;
1390 enum ehea_eq_type eq_type = EHEA_EQ;
1391 struct ehea_qp_init_attr *init_attr = NULL;
1392 int ret = -EIO;
1393
1394 memset(pr, 0, sizeof(struct ehea_port_res));
1395
1396 pr->port = port;
1397 spin_lock_init(&pr->xmit_lock);
1398 spin_lock_init(&pr->netif_queue);
1399
1400 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1401 if (!pr->eq) {
1402 ehea_error("create_eq failed (eq)");
1403 goto out_free;
1404 }
1405
1406 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1407 pr->eq->fw_handle,
1408 port->logical_port_id);
1409 if (!pr->recv_cq) {
1410 ehea_error("create_cq failed (cq_recv)");
1411 goto out_free;
1412 }
1413
1414 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1415 pr->eq->fw_handle,
1416 port->logical_port_id);
1417 if (!pr->send_cq) {
1418 ehea_error("create_cq failed (cq_send)");
1419 goto out_free;
1420 }
1421
1422 if (netif_msg_ifup(port))
1423 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1424 pr->send_cq->attr.act_nr_of_cqes,
1425 pr->recv_cq->attr.act_nr_of_cqes);
1426
1427 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1428 if (!init_attr) {
1429 ret = -ENOMEM;
1430 ehea_error("no mem for ehea_qp_init_attr");
1431 goto out_free;
1432 }
1433
1434 init_attr->low_lat_rq1 = 1;
1435 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1436 init_attr->rq_count = 3;
1437 init_attr->qp_token = queue_token;
1438 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1439 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1440 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1441 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1442 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1443 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1444 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1445 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1446 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1447 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1448 init_attr->port_nr = port->logical_port_id;
1449 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1450 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1451 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1452
1453 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1454 if (!pr->qp) {
1455 ehea_error("create_qp failed");
1456 ret = -EIO;
1457 goto out_free;
1458 }
1459
1460 if (netif_msg_ifup(port))
1461 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1462 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1463 init_attr->act_nr_send_wqes,
1464 init_attr->act_nr_rwqes_rq1,
1465 init_attr->act_nr_rwqes_rq2,
1466 init_attr->act_nr_rwqes_rq3);
1467
1468 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1469
1470 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1471 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1472 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1473 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1474 if (ret)
1475 goto out_free;
1476
1477 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1478 if (ehea_gen_smrs(pr) != 0) {
1479 ret = -EIO;
1480 goto out_free;
1481 }
1482
1483 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1484
1485 kfree(init_attr);
1486
1487 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1488
1489 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1490 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1491 pr->lro_mgr.lro_arr = pr->lro_desc;
1492 pr->lro_mgr.get_skb_header = get_skb_hdr;
1493 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1494 pr->lro_mgr.dev = port->netdev;
1495 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1496 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1497
1498 ret = 0;
1499 goto out;
1500
1501 out_free:
1502 kfree(init_attr);
1503 vfree(pr->sq_skba.arr);
1504 vfree(pr->rq1_skba.arr);
1505 vfree(pr->rq2_skba.arr);
1506 vfree(pr->rq3_skba.arr);
1507 ehea_destroy_qp(pr->qp);
1508 ehea_destroy_cq(pr->send_cq);
1509 ehea_destroy_cq(pr->recv_cq);
1510 ehea_destroy_eq(pr->eq);
1511 out:
1512 return ret;
1513 }
1514
1515 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1516 {
1517 int ret, i;
1518
1519 ret = ehea_destroy_qp(pr->qp);
1520
1521 if (!ret) {
1522 ehea_destroy_cq(pr->send_cq);
1523 ehea_destroy_cq(pr->recv_cq);
1524 ehea_destroy_eq(pr->eq);
1525
1526 for (i = 0; i < pr->rq1_skba.len; i++)
1527 if (pr->rq1_skba.arr[i])
1528 dev_kfree_skb(pr->rq1_skba.arr[i]);
1529
1530 for (i = 0; i < pr->rq2_skba.len; i++)
1531 if (pr->rq2_skba.arr[i])
1532 dev_kfree_skb(pr->rq2_skba.arr[i]);
1533
1534 for (i = 0; i < pr->rq3_skba.len; i++)
1535 if (pr->rq3_skba.arr[i])
1536 dev_kfree_skb(pr->rq3_skba.arr[i]);
1537
1538 for (i = 0; i < pr->sq_skba.len; i++)
1539 if (pr->sq_skba.arr[i])
1540 dev_kfree_skb(pr->sq_skba.arr[i]);
1541
1542 vfree(pr->rq1_skba.arr);
1543 vfree(pr->rq2_skba.arr);
1544 vfree(pr->rq3_skba.arr);
1545 vfree(pr->sq_skba.arr);
1546 ret = ehea_rem_smrs(pr);
1547 }
1548 return ret;
1549 }
1550
1551 /*
1552 * The write_* functions store information in swqe which is used by
1553 * the hardware to calculate the ip/tcp/udp checksum
1554 */
1555
1556 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1557 const struct sk_buff *skb)
1558 {
1559 swqe->ip_start = skb_network_offset(skb);
1560 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1561 }
1562
1563 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1564 const struct sk_buff *skb)
1565 {
1566 swqe->tcp_offset =
1567 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1568
1569 swqe->tcp_end = (u16)skb->len - 1;
1570 }
1571
1572 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1573 const struct sk_buff *skb)
1574 {
1575 swqe->tcp_offset =
1576 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1577
1578 swqe->tcp_end = (u16)skb->len - 1;
1579 }
1580
1581
1582 static void write_swqe2_TSO(struct sk_buff *skb,
1583 struct ehea_swqe *swqe, u32 lkey)
1584 {
1585 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1586 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1587 int skb_data_size = skb->len - skb->data_len;
1588 int headersize;
1589
1590 /* Packet is TCP with TSO enabled */
1591 swqe->tx_control |= EHEA_SWQE_TSO;
1592 swqe->mss = skb_shinfo(skb)->gso_size;
1593 /* copy only eth/ip/tcp headers to immediate data and
1594 * the rest of skb->data to sg1entry
1595 */
1596 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1597
1598 skb_data_size = skb->len - skb->data_len;
1599
1600 if (skb_data_size >= headersize) {
1601 /* copy immediate data */
1602 skb_copy_from_linear_data(skb, imm_data, headersize);
1603 swqe->immediate_data_length = headersize;
1604
1605 if (skb_data_size > headersize) {
1606 /* set sg1entry data */
1607 sg1entry->l_key = lkey;
1608 sg1entry->len = skb_data_size - headersize;
1609 sg1entry->vaddr =
1610 ehea_map_vaddr(skb->data + headersize);
1611 swqe->descriptors++;
1612 }
1613 } else
1614 ehea_error("cannot handle fragmented headers");
1615 }
1616
1617 static void write_swqe2_nonTSO(struct sk_buff *skb,
1618 struct ehea_swqe *swqe, u32 lkey)
1619 {
1620 int skb_data_size = skb->len - skb->data_len;
1621 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1622 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1623
1624 /* Packet is any nonTSO type
1625 *
1626 * Copy as much as possible skb->data to immediate data and
1627 * the rest to sg1entry
1628 */
1629 if (skb_data_size >= SWQE2_MAX_IMM) {
1630 /* copy immediate data */
1631 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1632
1633 swqe->immediate_data_length = SWQE2_MAX_IMM;
1634
1635 if (skb_data_size > SWQE2_MAX_IMM) {
1636 /* copy sg1entry data */
1637 sg1entry->l_key = lkey;
1638 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1639 sg1entry->vaddr =
1640 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1641 swqe->descriptors++;
1642 }
1643 } else {
1644 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1645 swqe->immediate_data_length = skb_data_size;
1646 }
1647 }
1648
1649 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1650 struct ehea_swqe *swqe, u32 lkey)
1651 {
1652 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1653 skb_frag_t *frag;
1654 int nfrags, sg1entry_contains_frag_data, i;
1655
1656 nfrags = skb_shinfo(skb)->nr_frags;
1657 sg1entry = &swqe->u.immdata_desc.sg_entry;
1658 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1659 swqe->descriptors = 0;
1660 sg1entry_contains_frag_data = 0;
1661
1662 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1663 write_swqe2_TSO(skb, swqe, lkey);
1664 else
1665 write_swqe2_nonTSO(skb, swqe, lkey);
1666
1667 /* write descriptors */
1668 if (nfrags > 0) {
1669 if (swqe->descriptors == 0) {
1670 /* sg1entry not yet used */
1671 frag = &skb_shinfo(skb)->frags[0];
1672
1673 /* copy sg1entry data */
1674 sg1entry->l_key = lkey;
1675 sg1entry->len = frag->size;
1676 sg1entry->vaddr =
1677 ehea_map_vaddr(page_address(frag->page)
1678 + frag->page_offset);
1679 swqe->descriptors++;
1680 sg1entry_contains_frag_data = 1;
1681 }
1682
1683 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1684
1685 frag = &skb_shinfo(skb)->frags[i];
1686 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1687
1688 sgentry->l_key = lkey;
1689 sgentry->len = frag->size;
1690 sgentry->vaddr =
1691 ehea_map_vaddr(page_address(frag->page)
1692 + frag->page_offset);
1693 swqe->descriptors++;
1694 }
1695 }
1696 }
1697
1698 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1699 {
1700 int ret = 0;
1701 u64 hret;
1702 u8 reg_type;
1703
1704 /* De/Register untagged packets */
1705 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1706 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1707 port->logical_port_id,
1708 reg_type, port->mac_addr, 0, hcallid);
1709 if (hret != H_SUCCESS) {
1710 ehea_error("%sregistering bc address failed (tagged)",
1711 hcallid == H_REG_BCMC ? "" : "de");
1712 ret = -EIO;
1713 goto out_herr;
1714 }
1715
1716 /* De/Register VLAN packets */
1717 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1718 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1719 port->logical_port_id,
1720 reg_type, port->mac_addr, 0, hcallid);
1721 if (hret != H_SUCCESS) {
1722 ehea_error("%sregistering bc address failed (vlan)",
1723 hcallid == H_REG_BCMC ? "" : "de");
1724 ret = -EIO;
1725 }
1726 out_herr:
1727 return ret;
1728 }
1729
1730 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1731 {
1732 struct ehea_port *port = netdev_priv(dev);
1733 struct sockaddr *mac_addr = sa;
1734 struct hcp_ehea_port_cb0 *cb0;
1735 int ret;
1736 u64 hret;
1737
1738 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1739 ret = -EADDRNOTAVAIL;
1740 goto out;
1741 }
1742
1743 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1744 if (!cb0) {
1745 ehea_error("no mem for cb0");
1746 ret = -ENOMEM;
1747 goto out;
1748 }
1749
1750 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1751
1752 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1753
1754 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1755 port->logical_port_id, H_PORT_CB0,
1756 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1757 if (hret != H_SUCCESS) {
1758 ret = -EIO;
1759 goto out_free;
1760 }
1761
1762 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1763
1764 down(&ehea_bcmc_regs.lock);
1765
1766 /* Deregister old MAC in pHYP */
1767 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1768 if (ret)
1769 goto out_upregs;
1770
1771 port->mac_addr = cb0->port_mac_addr << 16;
1772
1773 /* Register new MAC in pHYP */
1774 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1775 if (ret)
1776 goto out_upregs;
1777
1778 ret = 0;
1779
1780 out_upregs:
1781 ehea_update_bcmc_registrations();
1782 up(&ehea_bcmc_regs.lock);
1783 out_free:
1784 kfree(cb0);
1785 out:
1786 return ret;
1787 }
1788
1789 static void ehea_promiscuous_error(u64 hret, int enable)
1790 {
1791 if (hret == H_AUTHORITY)
1792 ehea_info("Hypervisor denied %sabling promiscuous mode",
1793 enable == 1 ? "en" : "dis");
1794 else
1795 ehea_error("failed %sabling promiscuous mode",
1796 enable == 1 ? "en" : "dis");
1797 }
1798
1799 static void ehea_promiscuous(struct net_device *dev, int enable)
1800 {
1801 struct ehea_port *port = netdev_priv(dev);
1802 struct hcp_ehea_port_cb7 *cb7;
1803 u64 hret;
1804
1805 if ((enable && port->promisc) || (!enable && !port->promisc))
1806 return;
1807
1808 cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1809 if (!cb7) {
1810 ehea_error("no mem for cb7");
1811 goto out;
1812 }
1813
1814 /* Modify Pxs_DUCQPN in CB7 */
1815 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1816
1817 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1818 port->logical_port_id,
1819 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1820 if (hret) {
1821 ehea_promiscuous_error(hret, enable);
1822 goto out;
1823 }
1824
1825 port->promisc = enable;
1826 out:
1827 kfree(cb7);
1828 return;
1829 }
1830
1831 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1832 u32 hcallid)
1833 {
1834 u64 hret;
1835 u8 reg_type;
1836
1837 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1838 | EHEA_BCMC_UNTAGGED;
1839
1840 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1841 port->logical_port_id,
1842 reg_type, mc_mac_addr, 0, hcallid);
1843 if (hret)
1844 goto out;
1845
1846 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1847 | EHEA_BCMC_VLANID_ALL;
1848
1849 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1850 port->logical_port_id,
1851 reg_type, mc_mac_addr, 0, hcallid);
1852 out:
1853 return hret;
1854 }
1855
1856 static int ehea_drop_multicast_list(struct net_device *dev)
1857 {
1858 struct ehea_port *port = netdev_priv(dev);
1859 struct ehea_mc_list *mc_entry = port->mc_list;
1860 struct list_head *pos;
1861 struct list_head *temp;
1862 int ret = 0;
1863 u64 hret;
1864
1865 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1866 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1867
1868 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1869 H_DEREG_BCMC);
1870 if (hret) {
1871 ehea_error("failed deregistering mcast MAC");
1872 ret = -EIO;
1873 }
1874
1875 list_del(pos);
1876 kfree(mc_entry);
1877 }
1878 return ret;
1879 }
1880
1881 static void ehea_allmulti(struct net_device *dev, int enable)
1882 {
1883 struct ehea_port *port = netdev_priv(dev);
1884 u64 hret;
1885
1886 if (!port->allmulti) {
1887 if (enable) {
1888 /* Enable ALLMULTI */
1889 ehea_drop_multicast_list(dev);
1890 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1891 if (!hret)
1892 port->allmulti = 1;
1893 else
1894 ehea_error("failed enabling IFF_ALLMULTI");
1895 }
1896 } else
1897 if (!enable) {
1898 /* Disable ALLMULTI */
1899 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1900 if (!hret)
1901 port->allmulti = 0;
1902 else
1903 ehea_error("failed disabling IFF_ALLMULTI");
1904 }
1905 }
1906
1907 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1908 {
1909 struct ehea_mc_list *ehea_mcl_entry;
1910 u64 hret;
1911
1912 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1913 if (!ehea_mcl_entry) {
1914 ehea_error("no mem for mcl_entry");
1915 return;
1916 }
1917
1918 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1919
1920 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1921
1922 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1923 H_REG_BCMC);
1924 if (!hret)
1925 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1926 else {
1927 ehea_error("failed registering mcast MAC");
1928 kfree(ehea_mcl_entry);
1929 }
1930 }
1931
1932 static void ehea_set_multicast_list(struct net_device *dev)
1933 {
1934 struct ehea_port *port = netdev_priv(dev);
1935 struct dev_mc_list *k_mcl_entry;
1936 int ret, i;
1937
1938 if (dev->flags & IFF_PROMISC) {
1939 ehea_promiscuous(dev, 1);
1940 return;
1941 }
1942 ehea_promiscuous(dev, 0);
1943
1944 down(&ehea_bcmc_regs.lock);
1945
1946 if (dev->flags & IFF_ALLMULTI) {
1947 ehea_allmulti(dev, 1);
1948 goto out;
1949 }
1950 ehea_allmulti(dev, 0);
1951
1952 if (dev->mc_count) {
1953 ret = ehea_drop_multicast_list(dev);
1954 if (ret) {
1955 /* Dropping the current multicast list failed.
1956 * Enabling ALL_MULTI is the best we can do.
1957 */
1958 ehea_allmulti(dev, 1);
1959 }
1960
1961 if (dev->mc_count > port->adapter->max_mc_mac) {
1962 ehea_info("Mcast registration limit reached (0x%lx). "
1963 "Use ALLMULTI!",
1964 port->adapter->max_mc_mac);
1965 goto out;
1966 }
1967
1968 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
1969 k_mcl_entry = k_mcl_entry->next)
1970 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1971
1972 }
1973 out:
1974 ehea_update_bcmc_registrations();
1975 up(&ehea_bcmc_regs.lock);
1976 return;
1977 }
1978
1979 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1980 {
1981 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1982 return -EINVAL;
1983 dev->mtu = new_mtu;
1984 return 0;
1985 }
1986
1987 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1988 struct ehea_swqe *swqe, u32 lkey)
1989 {
1990 if (skb->protocol == htons(ETH_P_IP)) {
1991 const struct iphdr *iph = ip_hdr(skb);
1992
1993 /* IPv4 */
1994 swqe->tx_control |= EHEA_SWQE_CRC
1995 | EHEA_SWQE_IP_CHECKSUM
1996 | EHEA_SWQE_TCP_CHECKSUM
1997 | EHEA_SWQE_IMM_DATA_PRESENT
1998 | EHEA_SWQE_DESCRIPTORS_PRESENT;
1999
2000 write_ip_start_end(swqe, skb);
2001
2002 if (iph->protocol == IPPROTO_UDP) {
2003 if ((iph->frag_off & IP_MF)
2004 || (iph->frag_off & IP_OFFSET))
2005 /* IP fragment, so don't change cs */
2006 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2007 else
2008 write_udp_offset_end(swqe, skb);
2009 } else if (iph->protocol == IPPROTO_TCP) {
2010 write_tcp_offset_end(swqe, skb);
2011 }
2012
2013 /* icmp (big data) and ip segmentation packets (all other ip
2014 packets) do not require any special handling */
2015
2016 } else {
2017 /* Other Ethernet Protocol */
2018 swqe->tx_control |= EHEA_SWQE_CRC
2019 | EHEA_SWQE_IMM_DATA_PRESENT
2020 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2021 }
2022
2023 write_swqe2_data(skb, dev, swqe, lkey);
2024 }
2025
2026 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2027 struct ehea_swqe *swqe)
2028 {
2029 int nfrags = skb_shinfo(skb)->nr_frags;
2030 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2031 skb_frag_t *frag;
2032 int i;
2033
2034 if (skb->protocol == htons(ETH_P_IP)) {
2035 const struct iphdr *iph = ip_hdr(skb);
2036
2037 /* IPv4 */
2038 write_ip_start_end(swqe, skb);
2039
2040 if (iph->protocol == IPPROTO_TCP) {
2041 swqe->tx_control |= EHEA_SWQE_CRC
2042 | EHEA_SWQE_IP_CHECKSUM
2043 | EHEA_SWQE_TCP_CHECKSUM
2044 | EHEA_SWQE_IMM_DATA_PRESENT;
2045
2046 write_tcp_offset_end(swqe, skb);
2047
2048 } else if (iph->protocol == IPPROTO_UDP) {
2049 if ((iph->frag_off & IP_MF)
2050 || (iph->frag_off & IP_OFFSET))
2051 /* IP fragment, so don't change cs */
2052 swqe->tx_control |= EHEA_SWQE_CRC
2053 | EHEA_SWQE_IMM_DATA_PRESENT;
2054 else {
2055 swqe->tx_control |= EHEA_SWQE_CRC
2056 | EHEA_SWQE_IP_CHECKSUM
2057 | EHEA_SWQE_TCP_CHECKSUM
2058 | EHEA_SWQE_IMM_DATA_PRESENT;
2059
2060 write_udp_offset_end(swqe, skb);
2061 }
2062 } else {
2063 /* icmp (big data) and
2064 ip segmentation packets (all other ip packets) */
2065 swqe->tx_control |= EHEA_SWQE_CRC
2066 | EHEA_SWQE_IP_CHECKSUM
2067 | EHEA_SWQE_IMM_DATA_PRESENT;
2068 }
2069 } else {
2070 /* Other Ethernet Protocol */
2071 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2072 }
2073 /* copy (immediate) data */
2074 if (nfrags == 0) {
2075 /* data is in a single piece */
2076 skb_copy_from_linear_data(skb, imm_data, skb->len);
2077 } else {
2078 /* first copy data from the skb->data buffer ... */
2079 skb_copy_from_linear_data(skb, imm_data,
2080 skb->len - skb->data_len);
2081 imm_data += skb->len - skb->data_len;
2082
2083 /* ... then copy data from the fragments */
2084 for (i = 0; i < nfrags; i++) {
2085 frag = &skb_shinfo(skb)->frags[i];
2086 memcpy(imm_data,
2087 page_address(frag->page) + frag->page_offset,
2088 frag->size);
2089 imm_data += frag->size;
2090 }
2091 }
2092 swqe->immediate_data_length = skb->len;
2093 dev_kfree_skb(skb);
2094 }
2095
2096 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2097 {
2098 struct tcphdr *tcp;
2099 u32 tmp;
2100
2101 if ((skb->protocol == htons(ETH_P_IP)) &&
2102 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2103 tcp = (struct tcphdr *)(skb_network_header(skb) +
2104 (ip_hdr(skb)->ihl * 4));
2105 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2106 tmp += ip_hdr(skb)->daddr % 31;
2107 return tmp % num_qps;
2108 } else
2109 return 0;
2110 }
2111
2112 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2113 {
2114 struct ehea_port *port = netdev_priv(dev);
2115 struct ehea_swqe *swqe;
2116 unsigned long flags;
2117 u32 lkey;
2118 int swqe_index;
2119 struct ehea_port_res *pr;
2120
2121 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2122
2123 if (!spin_trylock(&pr->xmit_lock))
2124 return NETDEV_TX_BUSY;
2125
2126 if (pr->queue_stopped) {
2127 spin_unlock(&pr->xmit_lock);
2128 return NETDEV_TX_BUSY;
2129 }
2130
2131 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2132 memset(swqe, 0, SWQE_HEADER_SIZE);
2133 atomic_dec(&pr->swqe_avail);
2134
2135 if (skb->len <= SWQE3_MAX_IMM) {
2136 u32 sig_iv = port->sig_comp_iv;
2137 u32 swqe_num = pr->swqe_id_counter;
2138 ehea_xmit3(skb, dev, swqe);
2139 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2140 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2141 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2142 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2143 sig_iv);
2144 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2145 pr->swqe_ll_count = 0;
2146 } else
2147 pr->swqe_ll_count += 1;
2148 } else {
2149 swqe->wr_id =
2150 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2151 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2152 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2153 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2154 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2155
2156 pr->sq_skba.index++;
2157 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2158
2159 lkey = pr->send_mr.lkey;
2160 ehea_xmit2(skb, dev, swqe, lkey);
2161 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2162 }
2163 pr->swqe_id_counter += 1;
2164
2165 if (port->vgrp && vlan_tx_tag_present(skb)) {
2166 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2167 swqe->vlan_tag = vlan_tx_tag_get(skb);
2168 }
2169
2170 if (netif_msg_tx_queued(port)) {
2171 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2172 ehea_dump(swqe, 512, "swqe");
2173 }
2174
2175 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2176 netif_stop_queue(dev);
2177 swqe->tx_control |= EHEA_SWQE_PURGE;
2178 }
2179
2180 ehea_post_swqe(pr->qp, swqe);
2181 pr->tx_packets++;
2182
2183 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2184 spin_lock_irqsave(&pr->netif_queue, flags);
2185 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2186 pr->p_stats.queue_stopped++;
2187 netif_stop_queue(dev);
2188 pr->queue_stopped = 1;
2189 }
2190 spin_unlock_irqrestore(&pr->netif_queue, flags);
2191 }
2192 dev->trans_start = jiffies;
2193 spin_unlock(&pr->xmit_lock);
2194
2195 return NETDEV_TX_OK;
2196 }
2197
2198 static void ehea_vlan_rx_register(struct net_device *dev,
2199 struct vlan_group *grp)
2200 {
2201 struct ehea_port *port = netdev_priv(dev);
2202 struct ehea_adapter *adapter = port->adapter;
2203 struct hcp_ehea_port_cb1 *cb1;
2204 u64 hret;
2205
2206 port->vgrp = grp;
2207
2208 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2209 if (!cb1) {
2210 ehea_error("no mem for cb1");
2211 goto out;
2212 }
2213
2214 memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
2215
2216 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2217 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2218 if (hret != H_SUCCESS)
2219 ehea_error("modify_ehea_port failed");
2220
2221 kfree(cb1);
2222 out:
2223 return;
2224 }
2225
2226 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2227 {
2228 struct ehea_port *port = netdev_priv(dev);
2229 struct ehea_adapter *adapter = port->adapter;
2230 struct hcp_ehea_port_cb1 *cb1;
2231 int index;
2232 u64 hret;
2233
2234 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2235 if (!cb1) {
2236 ehea_error("no mem for cb1");
2237 goto out;
2238 }
2239
2240 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2241 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2242 if (hret != H_SUCCESS) {
2243 ehea_error("query_ehea_port failed");
2244 goto out;
2245 }
2246
2247 index = (vid / 64);
2248 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2249
2250 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2251 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2252 if (hret != H_SUCCESS)
2253 ehea_error("modify_ehea_port failed");
2254 out:
2255 kfree(cb1);
2256 return;
2257 }
2258
2259 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2260 {
2261 struct ehea_port *port = netdev_priv(dev);
2262 struct ehea_adapter *adapter = port->adapter;
2263 struct hcp_ehea_port_cb1 *cb1;
2264 int index;
2265 u64 hret;
2266
2267 vlan_group_set_device(port->vgrp, vid, NULL);
2268
2269 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2270 if (!cb1) {
2271 ehea_error("no mem for cb1");
2272 goto out;
2273 }
2274
2275 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2276 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2277 if (hret != H_SUCCESS) {
2278 ehea_error("query_ehea_port failed");
2279 goto out;
2280 }
2281
2282 index = (vid / 64);
2283 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2284
2285 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2286 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2287 if (hret != H_SUCCESS)
2288 ehea_error("modify_ehea_port failed");
2289 out:
2290 kfree(cb1);
2291 return;
2292 }
2293
2294 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2295 {
2296 int ret = -EIO;
2297 u64 hret;
2298 u16 dummy16 = 0;
2299 u64 dummy64 = 0;
2300 struct hcp_modify_qp_cb0 *cb0;
2301
2302 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2303 if (!cb0) {
2304 ret = -ENOMEM;
2305 goto out;
2306 }
2307
2308 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2309 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2310 if (hret != H_SUCCESS) {
2311 ehea_error("query_ehea_qp failed (1)");
2312 goto out;
2313 }
2314
2315 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2316 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2317 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2318 &dummy64, &dummy64, &dummy16, &dummy16);
2319 if (hret != H_SUCCESS) {
2320 ehea_error("modify_ehea_qp failed (1)");
2321 goto out;
2322 }
2323
2324 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2325 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2326 if (hret != H_SUCCESS) {
2327 ehea_error("query_ehea_qp failed (2)");
2328 goto out;
2329 }
2330
2331 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2332 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2333 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2334 &dummy64, &dummy64, &dummy16, &dummy16);
2335 if (hret != H_SUCCESS) {
2336 ehea_error("modify_ehea_qp failed (2)");
2337 goto out;
2338 }
2339
2340 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2341 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2342 if (hret != H_SUCCESS) {
2343 ehea_error("query_ehea_qp failed (3)");
2344 goto out;
2345 }
2346
2347 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2348 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2349 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2350 &dummy64, &dummy64, &dummy16, &dummy16);
2351 if (hret != H_SUCCESS) {
2352 ehea_error("modify_ehea_qp failed (3)");
2353 goto out;
2354 }
2355
2356 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2357 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2358 if (hret != H_SUCCESS) {
2359 ehea_error("query_ehea_qp failed (4)");
2360 goto out;
2361 }
2362
2363 ret = 0;
2364 out:
2365 kfree(cb0);
2366 return ret;
2367 }
2368
2369 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2370 int add_tx_qps)
2371 {
2372 int ret, i;
2373 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2374 enum ehea_eq_type eq_type = EHEA_EQ;
2375
2376 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2377 EHEA_MAX_ENTRIES_EQ, 1);
2378 if (!port->qp_eq) {
2379 ret = -EINVAL;
2380 ehea_error("ehea_create_eq failed (qp_eq)");
2381 goto out_kill_eq;
2382 }
2383
2384 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2385 pr_cfg.max_entries_scq = sq_entries * 2;
2386 pr_cfg.max_entries_sq = sq_entries;
2387 pr_cfg.max_entries_rq1 = rq1_entries;
2388 pr_cfg.max_entries_rq2 = rq2_entries;
2389 pr_cfg.max_entries_rq3 = rq3_entries;
2390
2391 pr_cfg_small_rx.max_entries_rcq = 1;
2392 pr_cfg_small_rx.max_entries_scq = sq_entries;
2393 pr_cfg_small_rx.max_entries_sq = sq_entries;
2394 pr_cfg_small_rx.max_entries_rq1 = 1;
2395 pr_cfg_small_rx.max_entries_rq2 = 1;
2396 pr_cfg_small_rx.max_entries_rq3 = 1;
2397
2398 for (i = 0; i < def_qps; i++) {
2399 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2400 if (ret)
2401 goto out_clean_pr;
2402 }
2403 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2404 ret = ehea_init_port_res(port, &port->port_res[i],
2405 &pr_cfg_small_rx, i);
2406 if (ret)
2407 goto out_clean_pr;
2408 }
2409
2410 return 0;
2411
2412 out_clean_pr:
2413 while (--i >= 0)
2414 ehea_clean_portres(port, &port->port_res[i]);
2415
2416 out_kill_eq:
2417 ehea_destroy_eq(port->qp_eq);
2418 return ret;
2419 }
2420
2421 static int ehea_clean_all_portres(struct ehea_port *port)
2422 {
2423 int ret = 0;
2424 int i;
2425
2426 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2427 ret |= ehea_clean_portres(port, &port->port_res[i]);
2428
2429 ret |= ehea_destroy_eq(port->qp_eq);
2430
2431 return ret;
2432 }
2433
2434 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2435 {
2436 if (adapter->active_ports)
2437 return;
2438
2439 ehea_rem_mr(&adapter->mr);
2440 }
2441
2442 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2443 {
2444 if (adapter->active_ports)
2445 return 0;
2446
2447 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2448 }
2449
2450 static int ehea_up(struct net_device *dev)
2451 {
2452 int ret, i;
2453 struct ehea_port *port = netdev_priv(dev);
2454
2455 if (port->state == EHEA_PORT_UP)
2456 return 0;
2457
2458 down(&ehea_fw_handles.lock);
2459
2460 ret = ehea_port_res_setup(port, port->num_def_qps,
2461 port->num_add_tx_qps);
2462 if (ret) {
2463 ehea_error("port_res_failed");
2464 goto out;
2465 }
2466
2467 /* Set default QP for this port */
2468 ret = ehea_configure_port(port);
2469 if (ret) {
2470 ehea_error("ehea_configure_port failed. ret:%d", ret);
2471 goto out_clean_pr;
2472 }
2473
2474 ret = ehea_reg_interrupts(dev);
2475 if (ret) {
2476 ehea_error("reg_interrupts failed. ret:%d", ret);
2477 goto out_clean_pr;
2478 }
2479
2480 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2481 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2482 if (ret) {
2483 ehea_error("activate_qp failed");
2484 goto out_free_irqs;
2485 }
2486 }
2487
2488 for (i = 0; i < port->num_def_qps; i++) {
2489 ret = ehea_fill_port_res(&port->port_res[i]);
2490 if (ret) {
2491 ehea_error("out_free_irqs");
2492 goto out_free_irqs;
2493 }
2494 }
2495
2496 down(&ehea_bcmc_regs.lock);
2497
2498 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2499 if (ret) {
2500 ret = -EIO;
2501 goto out_free_irqs;
2502 }
2503
2504 port->state = EHEA_PORT_UP;
2505
2506 ret = 0;
2507 goto out;
2508
2509 out_free_irqs:
2510 ehea_free_interrupts(dev);
2511
2512 out_clean_pr:
2513 ehea_clean_all_portres(port);
2514 out:
2515 if (ret)
2516 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2517
2518 ehea_update_bcmc_registrations();
2519 up(&ehea_bcmc_regs.lock);
2520
2521 ehea_update_firmware_handles();
2522 up(&ehea_fw_handles.lock);
2523
2524 return ret;
2525 }
2526
2527 static void port_napi_disable(struct ehea_port *port)
2528 {
2529 int i;
2530
2531 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2532 napi_disable(&port->port_res[i].napi);
2533 }
2534
2535 static void port_napi_enable(struct ehea_port *port)
2536 {
2537 int i;
2538
2539 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2540 napi_enable(&port->port_res[i].napi);
2541 }
2542
2543 static int ehea_open(struct net_device *dev)
2544 {
2545 int ret;
2546 struct ehea_port *port = netdev_priv(dev);
2547
2548 down(&port->port_lock);
2549
2550 if (netif_msg_ifup(port))
2551 ehea_info("enabling port %s", dev->name);
2552
2553 ret = ehea_up(dev);
2554 if (!ret) {
2555 port_napi_enable(port);
2556 netif_start_queue(dev);
2557 }
2558
2559 up(&port->port_lock);
2560
2561 return ret;
2562 }
2563
2564 static int ehea_down(struct net_device *dev)
2565 {
2566 int ret;
2567 struct ehea_port *port = netdev_priv(dev);
2568
2569 if (port->state == EHEA_PORT_DOWN)
2570 return 0;
2571
2572 down(&ehea_bcmc_regs.lock);
2573 ehea_drop_multicast_list(dev);
2574 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2575
2576 ehea_free_interrupts(dev);
2577
2578 down(&ehea_fw_handles.lock);
2579
2580 port->state = EHEA_PORT_DOWN;
2581
2582 ehea_update_bcmc_registrations();
2583 up(&ehea_bcmc_regs.lock);
2584
2585 ret = ehea_clean_all_portres(port);
2586 if (ret)
2587 ehea_info("Failed freeing resources for %s. ret=%i",
2588 dev->name, ret);
2589
2590 ehea_update_firmware_handles();
2591 up(&ehea_fw_handles.lock);
2592
2593 return ret;
2594 }
2595
2596 static int ehea_stop(struct net_device *dev)
2597 {
2598 int ret;
2599 struct ehea_port *port = netdev_priv(dev);
2600
2601 if (netif_msg_ifdown(port))
2602 ehea_info("disabling port %s", dev->name);
2603
2604 flush_scheduled_work();
2605 down(&port->port_lock);
2606 netif_stop_queue(dev);
2607 port_napi_disable(port);
2608 ret = ehea_down(dev);
2609 up(&port->port_lock);
2610 return ret;
2611 }
2612
2613 void ehea_purge_sq(struct ehea_qp *orig_qp)
2614 {
2615 struct ehea_qp qp = *orig_qp;
2616 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2617 struct ehea_swqe *swqe;
2618 int wqe_index;
2619 int i;
2620
2621 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2622 swqe = ehea_get_swqe(&qp, &wqe_index);
2623 swqe->tx_control |= EHEA_SWQE_PURGE;
2624 }
2625 }
2626
2627 void ehea_flush_sq(struct ehea_port *port)
2628 {
2629 int i;
2630
2631 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2632 struct ehea_port_res *pr = &port->port_res[i];
2633 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2634 int k = 0;
2635 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2636 msleep(5);
2637 if (++k == 20)
2638 break;
2639 }
2640 }
2641 }
2642
2643 int ehea_stop_qps(struct net_device *dev)
2644 {
2645 struct ehea_port *port = netdev_priv(dev);
2646 struct ehea_adapter *adapter = port->adapter;
2647 struct hcp_modify_qp_cb0 *cb0;
2648 int ret = -EIO;
2649 int dret;
2650 int i;
2651 u64 hret;
2652 u64 dummy64 = 0;
2653 u16 dummy16 = 0;
2654
2655 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2656 if (!cb0) {
2657 ret = -ENOMEM;
2658 goto out;
2659 }
2660
2661 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2662 struct ehea_port_res *pr = &port->port_res[i];
2663 struct ehea_qp *qp = pr->qp;
2664
2665 /* Purge send queue */
2666 ehea_purge_sq(qp);
2667
2668 /* Disable queue pair */
2669 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2670 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2671 cb0);
2672 if (hret != H_SUCCESS) {
2673 ehea_error("query_ehea_qp failed (1)");
2674 goto out;
2675 }
2676
2677 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2678 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2679
2680 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2681 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2682 1), cb0, &dummy64,
2683 &dummy64, &dummy16, &dummy16);
2684 if (hret != H_SUCCESS) {
2685 ehea_error("modify_ehea_qp failed (1)");
2686 goto out;
2687 }
2688
2689 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2690 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2691 cb0);
2692 if (hret != H_SUCCESS) {
2693 ehea_error("query_ehea_qp failed (2)");
2694 goto out;
2695 }
2696
2697 /* deregister shared memory regions */
2698 dret = ehea_rem_smrs(pr);
2699 if (dret) {
2700 ehea_error("unreg shared memory region failed");
2701 goto out;
2702 }
2703 }
2704
2705 ret = 0;
2706 out:
2707 kfree(cb0);
2708
2709 return ret;
2710 }
2711
2712 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2713 {
2714 struct ehea_qp qp = *orig_qp;
2715 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2716 struct ehea_rwqe *rwqe;
2717 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2718 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2719 struct sk_buff *skb;
2720 u32 lkey = pr->recv_mr.lkey;
2721
2722
2723 int i;
2724 int index;
2725
2726 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2727 rwqe = ehea_get_next_rwqe(&qp, 2);
2728 rwqe->sg_list[0].l_key = lkey;
2729 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2730 skb = skba_rq2[index];
2731 if (skb)
2732 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2733 }
2734
2735 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2736 rwqe = ehea_get_next_rwqe(&qp, 3);
2737 rwqe->sg_list[0].l_key = lkey;
2738 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2739 skb = skba_rq3[index];
2740 if (skb)
2741 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2742 }
2743 }
2744
2745 int ehea_restart_qps(struct net_device *dev)
2746 {
2747 struct ehea_port *port = netdev_priv(dev);
2748 struct ehea_adapter *adapter = port->adapter;
2749 int ret = 0;
2750 int i;
2751
2752 struct hcp_modify_qp_cb0 *cb0;
2753 u64 hret;
2754 u64 dummy64 = 0;
2755 u16 dummy16 = 0;
2756
2757 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2758 if (!cb0) {
2759 ret = -ENOMEM;
2760 goto out;
2761 }
2762
2763 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2764 struct ehea_port_res *pr = &port->port_res[i];
2765 struct ehea_qp *qp = pr->qp;
2766
2767 ret = ehea_gen_smrs(pr);
2768 if (ret) {
2769 ehea_error("creation of shared memory regions failed");
2770 goto out;
2771 }
2772
2773 ehea_update_rqs(qp, pr);
2774
2775 /* Enable queue pair */
2776 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2777 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2778 cb0);
2779 if (hret != H_SUCCESS) {
2780 ehea_error("query_ehea_qp failed (1)");
2781 goto out;
2782 }
2783
2784 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2785 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2786
2787 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2788 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2789 1), cb0, &dummy64,
2790 &dummy64, &dummy16, &dummy16);
2791 if (hret != H_SUCCESS) {
2792 ehea_error("modify_ehea_qp failed (1)");
2793 goto out;
2794 }
2795
2796 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2797 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2798 cb0);
2799 if (hret != H_SUCCESS) {
2800 ehea_error("query_ehea_qp failed (2)");
2801 goto out;
2802 }
2803
2804 /* refill entire queue */
2805 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2806 ehea_refill_rq2(pr, 0);
2807 ehea_refill_rq3(pr, 0);
2808 }
2809 out:
2810 kfree(cb0);
2811
2812 return ret;
2813 }
2814
2815 static void ehea_reset_port(struct work_struct *work)
2816 {
2817 int ret;
2818 struct ehea_port *port =
2819 container_of(work, struct ehea_port, reset_task);
2820 struct net_device *dev = port->netdev;
2821
2822 port->resets++;
2823 down(&port->port_lock);
2824 netif_stop_queue(dev);
2825
2826 port_napi_disable(port);
2827
2828 ehea_down(dev);
2829
2830 ret = ehea_up(dev);
2831 if (ret)
2832 goto out;
2833
2834 ehea_set_multicast_list(dev);
2835
2836 if (netif_msg_timer(port))
2837 ehea_info("Device %s resetted successfully", dev->name);
2838
2839 port_napi_enable(port);
2840
2841 netif_wake_queue(dev);
2842 out:
2843 up(&port->port_lock);
2844 return;
2845 }
2846
2847 static void ehea_rereg_mrs(struct work_struct *work)
2848 {
2849 int ret, i;
2850 struct ehea_adapter *adapter;
2851
2852 down(&dlpar_mem_lock);
2853 ehea_info("LPAR memory enlarged - re-initializing driver");
2854
2855 list_for_each_entry(adapter, &adapter_list, list)
2856 if (adapter->active_ports) {
2857 /* Shutdown all ports */
2858 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2859 struct ehea_port *port = adapter->port[i];
2860
2861 if (port) {
2862 struct net_device *dev = port->netdev;
2863
2864 if (dev->flags & IFF_UP) {
2865 down(&port->port_lock);
2866 netif_stop_queue(dev);
2867 ehea_flush_sq(port);
2868 ret = ehea_stop_qps(dev);
2869 if (ret) {
2870 up(&port->port_lock);
2871 goto out;
2872 }
2873 port_napi_disable(port);
2874 up(&port->port_lock);
2875 }
2876 }
2877 }
2878
2879 /* Unregister old memory region */
2880 ret = ehea_rem_mr(&adapter->mr);
2881 if (ret) {
2882 ehea_error("unregister MR failed - driver"
2883 " inoperable!");
2884 goto out;
2885 }
2886 }
2887
2888 ehea_destroy_busmap();
2889 ret = ehea_create_busmap();
2890 if (ret) {
2891 ehea_error("creating ehea busmap failed");
2892 goto out;
2893 }
2894
2895 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2896
2897 list_for_each_entry(adapter, &adapter_list, list)
2898 if (adapter->active_ports) {
2899 /* Register new memory region */
2900 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2901 if (ret) {
2902 ehea_error("register MR failed - driver"
2903 " inoperable!");
2904 goto out;
2905 }
2906
2907 /* Restart all ports */
2908 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2909 struct ehea_port *port = adapter->port[i];
2910
2911 if (port) {
2912 struct net_device *dev = port->netdev;
2913
2914 if (dev->flags & IFF_UP) {
2915 down(&port->port_lock);
2916 port_napi_enable(port);
2917 ret = ehea_restart_qps(dev);
2918 if (!ret)
2919 netif_wake_queue(dev);
2920 up(&port->port_lock);
2921 }
2922 }
2923 }
2924 }
2925 up(&dlpar_mem_lock);
2926 ehea_info("re-initializing driver complete");
2927 out:
2928 return;
2929 }
2930
2931 static void ehea_tx_watchdog(struct net_device *dev)
2932 {
2933 struct ehea_port *port = netdev_priv(dev);
2934
2935 if (netif_carrier_ok(dev) &&
2936 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2937 schedule_work(&port->reset_task);
2938 }
2939
2940 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2941 {
2942 struct hcp_query_ehea *cb;
2943 u64 hret;
2944 int ret;
2945
2946 cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2947 if (!cb) {
2948 ret = -ENOMEM;
2949 goto out;
2950 }
2951
2952 hret = ehea_h_query_ehea(adapter->handle, cb);
2953
2954 if (hret != H_SUCCESS) {
2955 ret = -EIO;
2956 goto out_herr;
2957 }
2958
2959 adapter->max_mc_mac = cb->max_mc_mac - 1;
2960 ret = 0;
2961
2962 out_herr:
2963 kfree(cb);
2964 out:
2965 return ret;
2966 }
2967
2968 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2969 {
2970 struct hcp_ehea_port_cb4 *cb4;
2971 u64 hret;
2972 int ret = 0;
2973
2974 *jumbo = 0;
2975
2976 /* (Try to) enable *jumbo frames */
2977 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2978 if (!cb4) {
2979 ehea_error("no mem for cb4");
2980 ret = -ENOMEM;
2981 goto out;
2982 } else {
2983 hret = ehea_h_query_ehea_port(port->adapter->handle,
2984 port->logical_port_id,
2985 H_PORT_CB4,
2986 H_PORT_CB4_JUMBO, cb4);
2987 if (hret == H_SUCCESS) {
2988 if (cb4->jumbo_frame)
2989 *jumbo = 1;
2990 else {
2991 cb4->jumbo_frame = 1;
2992 hret = ehea_h_modify_ehea_port(port->adapter->
2993 handle,
2994 port->
2995 logical_port_id,
2996 H_PORT_CB4,
2997 H_PORT_CB4_JUMBO,
2998 cb4);
2999 if (hret == H_SUCCESS)
3000 *jumbo = 1;
3001 }
3002 } else
3003 ret = -EINVAL;
3004
3005 kfree(cb4);
3006 }
3007 out:
3008 return ret;
3009 }
3010
3011 static ssize_t ehea_show_port_id(struct device *dev,
3012 struct device_attribute *attr, char *buf)
3013 {
3014 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3015 return sprintf(buf, "%d", port->logical_port_id);
3016 }
3017
3018 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3019 NULL);
3020
3021 static void __devinit logical_port_release(struct device *dev)
3022 {
3023 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3024 of_node_put(port->ofdev.node);
3025 }
3026
3027 static struct device *ehea_register_port(struct ehea_port *port,
3028 struct device_node *dn)
3029 {
3030 int ret;
3031
3032 port->ofdev.node = of_node_get(dn);
3033 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3034 port->ofdev.dev.bus = &ibmebus_bus_type;
3035
3036 sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
3037 port->ofdev.dev.release = logical_port_release;
3038
3039 ret = of_device_register(&port->ofdev);
3040 if (ret) {
3041 ehea_error("failed to register device. ret=%d", ret);
3042 goto out;
3043 }
3044
3045 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3046 if (ret) {
3047 ehea_error("failed to register attributes, ret=%d", ret);
3048 goto out_unreg_of_dev;
3049 }
3050
3051 return &port->ofdev.dev;
3052
3053 out_unreg_of_dev:
3054 of_device_unregister(&port->ofdev);
3055 out:
3056 return NULL;
3057 }
3058
3059 static void ehea_unregister_port(struct ehea_port *port)
3060 {
3061 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3062 of_device_unregister(&port->ofdev);
3063 }
3064
3065 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3066 u32 logical_port_id,
3067 struct device_node *dn)
3068 {
3069 int ret;
3070 struct net_device *dev;
3071 struct ehea_port *port;
3072 struct device *port_dev;
3073 int jumbo;
3074
3075 /* allocate memory for the port structures */
3076 dev = alloc_etherdev(sizeof(struct ehea_port));
3077
3078 if (!dev) {
3079 ehea_error("no mem for net_device");
3080 ret = -ENOMEM;
3081 goto out_err;
3082 }
3083
3084 port = netdev_priv(dev);
3085
3086 sema_init(&port->port_lock, 1);
3087 port->state = EHEA_PORT_DOWN;
3088 port->sig_comp_iv = sq_entries / 10;
3089
3090 port->adapter = adapter;
3091 port->netdev = dev;
3092 port->logical_port_id = logical_port_id;
3093
3094 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3095
3096 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3097 if (!port->mc_list) {
3098 ret = -ENOMEM;
3099 goto out_free_ethdev;
3100 }
3101
3102 INIT_LIST_HEAD(&port->mc_list->list);
3103
3104 ret = ehea_sense_port_attr(port);
3105 if (ret)
3106 goto out_free_mc_list;
3107
3108 port_dev = ehea_register_port(port, dn);
3109 if (!port_dev)
3110 goto out_free_mc_list;
3111
3112 SET_NETDEV_DEV(dev, port_dev);
3113
3114 /* initialize net_device structure */
3115 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3116
3117 dev->open = ehea_open;
3118 #ifdef CONFIG_NET_POLL_CONTROLLER
3119 dev->poll_controller = ehea_netpoll;
3120 #endif
3121 dev->stop = ehea_stop;
3122 dev->hard_start_xmit = ehea_start_xmit;
3123 dev->get_stats = ehea_get_stats;
3124 dev->set_multicast_list = ehea_set_multicast_list;
3125 dev->set_mac_address = ehea_set_mac_addr;
3126 dev->change_mtu = ehea_change_mtu;
3127 dev->vlan_rx_register = ehea_vlan_rx_register;
3128 dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
3129 dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
3130 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3131 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3132 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3133 | NETIF_F_LLTX;
3134 dev->tx_timeout = &ehea_tx_watchdog;
3135 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3136
3137 INIT_WORK(&port->reset_task, ehea_reset_port);
3138 ehea_set_ethtool_ops(dev);
3139
3140 ret = register_netdev(dev);
3141 if (ret) {
3142 ehea_error("register_netdev failed. ret=%d", ret);
3143 goto out_unreg_port;
3144 }
3145
3146 port->lro_max_aggr = lro_max_aggr;
3147
3148 ret = ehea_get_jumboframe_status(port, &jumbo);
3149 if (ret)
3150 ehea_error("failed determining jumbo frame status for %s",
3151 port->netdev->name);
3152
3153 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3154 jumbo == 1 ? "en" : "dis");
3155
3156 adapter->active_ports++;
3157
3158 return port;
3159
3160 out_unreg_port:
3161 ehea_unregister_port(port);
3162
3163 out_free_mc_list:
3164 kfree(port->mc_list);
3165
3166 out_free_ethdev:
3167 free_netdev(dev);
3168
3169 out_err:
3170 ehea_error("setting up logical port with id=%d failed, ret=%d",
3171 logical_port_id, ret);
3172 return NULL;
3173 }
3174
3175 static void ehea_shutdown_single_port(struct ehea_port *port)
3176 {
3177 unregister_netdev(port->netdev);
3178 ehea_unregister_port(port);
3179 kfree(port->mc_list);
3180 free_netdev(port->netdev);
3181 port->adapter->active_ports--;
3182 }
3183
3184 static int ehea_setup_ports(struct ehea_adapter *adapter)
3185 {
3186 struct device_node *lhea_dn;
3187 struct device_node *eth_dn = NULL;
3188
3189 const u32 *dn_log_port_id;
3190 int i = 0;
3191
3192 lhea_dn = adapter->ofdev->node;
3193 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3194
3195 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3196 NULL);
3197 if (!dn_log_port_id) {
3198 ehea_error("bad device node: eth_dn name=%s",
3199 eth_dn->full_name);
3200 continue;
3201 }
3202
3203 if (ehea_add_adapter_mr(adapter)) {
3204 ehea_error("creating MR failed");
3205 of_node_put(eth_dn);
3206 return -EIO;
3207 }
3208
3209 adapter->port[i] = ehea_setup_single_port(adapter,
3210 *dn_log_port_id,
3211 eth_dn);
3212 if (adapter->port[i])
3213 ehea_info("%s -> logical port id #%d",
3214 adapter->port[i]->netdev->name,
3215 *dn_log_port_id);
3216 else
3217 ehea_remove_adapter_mr(adapter);
3218
3219 i++;
3220 };
3221 return 0;
3222 }
3223
3224 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3225 u32 logical_port_id)
3226 {
3227 struct device_node *lhea_dn;
3228 struct device_node *eth_dn = NULL;
3229 const u32 *dn_log_port_id;
3230
3231 lhea_dn = adapter->ofdev->node;
3232 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3233
3234 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3235 NULL);
3236 if (dn_log_port_id)
3237 if (*dn_log_port_id == logical_port_id)
3238 return eth_dn;
3239 };
3240
3241 return NULL;
3242 }
3243
3244 static ssize_t ehea_probe_port(struct device *dev,
3245 struct device_attribute *attr,
3246 const char *buf, size_t count)
3247 {
3248 struct ehea_adapter *adapter = dev->driver_data;
3249 struct ehea_port *port;
3250 struct device_node *eth_dn = NULL;
3251 int i;
3252
3253 u32 logical_port_id;
3254
3255 sscanf(buf, "%d", &logical_port_id);
3256
3257 port = ehea_get_port(adapter, logical_port_id);
3258
3259 if (port) {
3260 ehea_info("adding port with logical port id=%d failed. port "
3261 "already configured as %s.", logical_port_id,
3262 port->netdev->name);
3263 return -EINVAL;
3264 }
3265
3266 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3267
3268 if (!eth_dn) {
3269 ehea_info("no logical port with id %d found", logical_port_id);
3270 return -EINVAL;
3271 }
3272
3273 if (ehea_add_adapter_mr(adapter)) {
3274 ehea_error("creating MR failed");
3275 return -EIO;
3276 }
3277
3278 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3279
3280 of_node_put(eth_dn);
3281
3282 if (port) {
3283 for (i = 0; i < EHEA_MAX_PORTS; i++)
3284 if (!adapter->port[i]) {
3285 adapter->port[i] = port;
3286 break;
3287 }
3288
3289 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3290 logical_port_id);
3291 } else {
3292 ehea_remove_adapter_mr(adapter);
3293 return -EIO;
3294 }
3295
3296 return (ssize_t) count;
3297 }
3298
3299 static ssize_t ehea_remove_port(struct device *dev,
3300 struct device_attribute *attr,
3301 const char *buf, size_t count)
3302 {
3303 struct ehea_adapter *adapter = dev->driver_data;
3304 struct ehea_port *port;
3305 int i;
3306 u32 logical_port_id;
3307
3308 sscanf(buf, "%d", &logical_port_id);
3309
3310 port = ehea_get_port(adapter, logical_port_id);
3311
3312 if (port) {
3313 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3314 logical_port_id);
3315
3316 ehea_shutdown_single_port(port);
3317
3318 for (i = 0; i < EHEA_MAX_PORTS; i++)
3319 if (adapter->port[i] == port) {
3320 adapter->port[i] = NULL;
3321 break;
3322 }
3323 } else {
3324 ehea_error("removing port with logical port id=%d failed. port "
3325 "not configured.", logical_port_id);
3326 return -EINVAL;
3327 }
3328
3329 ehea_remove_adapter_mr(adapter);
3330
3331 return (ssize_t) count;
3332 }
3333
3334 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3335 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3336
3337 int ehea_create_device_sysfs(struct of_device *dev)
3338 {
3339 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3340 if (ret)
3341 goto out;
3342
3343 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3344 out:
3345 return ret;
3346 }
3347
3348 void ehea_remove_device_sysfs(struct of_device *dev)
3349 {
3350 device_remove_file(&dev->dev, &dev_attr_probe_port);
3351 device_remove_file(&dev->dev, &dev_attr_remove_port);
3352 }
3353
3354 static int __devinit ehea_probe_adapter(struct of_device *dev,
3355 const struct of_device_id *id)
3356 {
3357 struct ehea_adapter *adapter;
3358 const u64 *adapter_handle;
3359 int ret;
3360
3361 if (!dev || !dev->node) {
3362 ehea_error("Invalid ibmebus device probed");
3363 return -EINVAL;
3364 }
3365 down(&ehea_fw_handles.lock);
3366
3367 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3368 if (!adapter) {
3369 ret = -ENOMEM;
3370 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3371 goto out;
3372 }
3373
3374 list_add(&adapter->list, &adapter_list);
3375
3376 adapter->ofdev = dev;
3377
3378 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3379 NULL);
3380 if (adapter_handle)
3381 adapter->handle = *adapter_handle;
3382
3383 if (!adapter->handle) {
3384 dev_err(&dev->dev, "failed getting handle for adapter"
3385 " '%s'\n", dev->node->full_name);
3386 ret = -ENODEV;
3387 goto out_free_ad;
3388 }
3389
3390 adapter->pd = EHEA_PD_ID;
3391
3392 dev->dev.driver_data = adapter;
3393
3394
3395 /* initialize adapter and ports */
3396 /* get adapter properties */
3397 ret = ehea_sense_adapter_attr(adapter);
3398 if (ret) {
3399 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3400 goto out_free_ad;
3401 }
3402
3403 adapter->neq = ehea_create_eq(adapter,
3404 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3405 if (!adapter->neq) {
3406 ret = -EIO;
3407 dev_err(&dev->dev, "NEQ creation failed\n");
3408 goto out_free_ad;
3409 }
3410
3411 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3412 (unsigned long)adapter);
3413
3414 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3415 ehea_interrupt_neq, IRQF_DISABLED,
3416 "ehea_neq", adapter);
3417 if (ret) {
3418 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3419 goto out_kill_eq;
3420 }
3421
3422 ret = ehea_create_device_sysfs(dev);
3423 if (ret)
3424 goto out_free_irq;
3425
3426 ret = ehea_setup_ports(adapter);
3427 if (ret) {
3428 dev_err(&dev->dev, "setup_ports failed\n");
3429 goto out_rem_dev_sysfs;
3430 }
3431
3432 ret = 0;
3433 goto out;
3434
3435 out_rem_dev_sysfs:
3436 ehea_remove_device_sysfs(dev);
3437
3438 out_free_irq:
3439 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3440
3441 out_kill_eq:
3442 ehea_destroy_eq(adapter->neq);
3443
3444 out_free_ad:
3445 kfree(adapter);
3446
3447 out:
3448 ehea_update_firmware_handles();
3449 up(&ehea_fw_handles.lock);
3450 return ret;
3451 }
3452
3453 static int __devexit ehea_remove(struct of_device *dev)
3454 {
3455 struct ehea_adapter *adapter = dev->dev.driver_data;
3456 int i;
3457
3458 for (i = 0; i < EHEA_MAX_PORTS; i++)
3459 if (adapter->port[i]) {
3460 ehea_shutdown_single_port(adapter->port[i]);
3461 adapter->port[i] = NULL;
3462 }
3463
3464 ehea_remove_device_sysfs(dev);
3465
3466 flush_scheduled_work();
3467
3468 down(&ehea_fw_handles.lock);
3469
3470 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3471 tasklet_kill(&adapter->neq_tasklet);
3472
3473 ehea_destroy_eq(adapter->neq);
3474 ehea_remove_adapter_mr(adapter);
3475 list_del(&adapter->list);
3476 kfree(adapter);
3477
3478 ehea_update_firmware_handles();
3479 up(&ehea_fw_handles.lock);
3480
3481 return 0;
3482 }
3483
3484 void ehea_crash_handler(void)
3485 {
3486 int i;
3487
3488 if (ehea_fw_handles.arr)
3489 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3490 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3491 ehea_fw_handles.arr[i].fwh,
3492 FORCE_FREE);
3493
3494 if (ehea_bcmc_regs.arr)
3495 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3496 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3497 ehea_bcmc_regs.arr[i].port_id,
3498 ehea_bcmc_regs.arr[i].reg_type,
3499 ehea_bcmc_regs.arr[i].macaddr,
3500 0, H_DEREG_BCMC);
3501 }
3502
3503 static int ehea_reboot_notifier(struct notifier_block *nb,
3504 unsigned long action, void *unused)
3505 {
3506 if (action == SYS_RESTART) {
3507 ehea_info("Reboot: freeing all eHEA resources");
3508 ibmebus_unregister_driver(&ehea_driver);
3509 }
3510 return NOTIFY_DONE;
3511 }
3512
3513 static struct notifier_block ehea_reboot_nb = {
3514 .notifier_call = ehea_reboot_notifier,
3515 };
3516
3517 static int check_module_parm(void)
3518 {
3519 int ret = 0;
3520
3521 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3522 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3523 ehea_info("Bad parameter: rq1_entries");
3524 ret = -EINVAL;
3525 }
3526 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3527 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3528 ehea_info("Bad parameter: rq2_entries");
3529 ret = -EINVAL;
3530 }
3531 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3532 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3533 ehea_info("Bad parameter: rq3_entries");
3534 ret = -EINVAL;
3535 }
3536 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3537 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3538 ehea_info("Bad parameter: sq_entries");
3539 ret = -EINVAL;
3540 }
3541
3542 return ret;
3543 }
3544
3545 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3546 char *buf)
3547 {
3548 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3549 }
3550
3551 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3552 ehea_show_capabilities, NULL);
3553
3554 int __init ehea_module_init(void)
3555 {
3556 int ret;
3557
3558 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3559 DRV_VERSION);
3560
3561
3562 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3563 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3564 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3565
3566 sema_init(&dlpar_mem_lock, 1);
3567 sema_init(&ehea_fw_handles.lock, 1);
3568 sema_init(&ehea_bcmc_regs.lock, 1);
3569
3570 ret = check_module_parm();
3571 if (ret)
3572 goto out;
3573
3574 ret = ehea_create_busmap();
3575 if (ret)
3576 goto out;
3577
3578 ret = register_reboot_notifier(&ehea_reboot_nb);
3579 if (ret)
3580 ehea_info("failed registering reboot notifier");
3581
3582 ret = crash_shutdown_register(&ehea_crash_handler);
3583 if (ret)
3584 ehea_info("failed registering crash handler");
3585
3586 ret = ibmebus_register_driver(&ehea_driver);
3587 if (ret) {
3588 ehea_error("failed registering eHEA device driver on ebus");
3589 goto out2;
3590 }
3591
3592 ret = driver_create_file(&ehea_driver.driver,
3593 &driver_attr_capabilities);
3594 if (ret) {
3595 ehea_error("failed to register capabilities attribute, ret=%d",
3596 ret);
3597 goto out3;
3598 }
3599
3600 return ret;
3601
3602 out3:
3603 ibmebus_unregister_driver(&ehea_driver);
3604 out2:
3605 unregister_reboot_notifier(&ehea_reboot_nb);
3606 crash_shutdown_unregister(&ehea_crash_handler);
3607 out:
3608 return ret;
3609 }
3610
3611 static void __exit ehea_module_exit(void)
3612 {
3613 int ret;
3614
3615 flush_scheduled_work();
3616 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3617 ibmebus_unregister_driver(&ehea_driver);
3618 unregister_reboot_notifier(&ehea_reboot_nb);
3619 ret = crash_shutdown_unregister(&ehea_crash_handler);
3620 if (ret)
3621 ehea_info("failed unregistering crash handler");
3622 kfree(ehea_fw_handles.arr);
3623 kfree(ehea_bcmc_regs.arr);
3624 ehea_destroy_busmap();
3625 }
3626
3627 module_init(ehea_module_init);
3628 module_exit(ehea_module_exit);
Support for the Chinese Samsung S3C2440 based development boards