1 /*
2 * linux/drivers/net/ehea/ehea_main.c
3 *
4 * eHEA ethernet device driver for IBM eServer System p
5 *
6 * (C) Copyright IBM Corp. 2006
7 *
8 * Authors:
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
12 *
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #include <linux/in.h>
30 #include <linux/ip.h>
31 #include <linux/tcp.h>
32 #include <linux/udp.h>
33 #include <linux/if.h>
34 #include <linux/list.h>
35 #include <linux/if_ether.h>
36 #include <linux/notifier.h>
37 #include <linux/reboot.h>
38 #include <linux/memory.h>
39 #include <asm/kexec.h>
40 #include <linux/mutex.h>
41
42 #include <net/ip.h>
43
44 #include "ehea.h"
45 #include "ehea_qmr.h"
46 #include "ehea_phyp.h"
47
48
49 MODULE_LICENSE("GPL");
50 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
51 MODULE_DESCRIPTION("IBM eServer HEA Driver");
52 MODULE_VERSION(DRV_VERSION);
53
54
55 static int msg_level = -1;
56 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
57 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
58 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
59 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
60 static int use_mcs;
61 static int use_lro;
62 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
63 static int num_tx_qps = EHEA_NUM_TX_QP;
64 static int prop_carrier_state;
65
66 module_param(msg_level, int, 0);
67 module_param(rq1_entries, int, 0);
68 module_param(rq2_entries, int, 0);
69 module_param(rq3_entries, int, 0);
70 module_param(sq_entries, int, 0);
71 module_param(prop_carrier_state, int, 0);
72 module_param(use_mcs, int, 0);
73 module_param(use_lro, int, 0);
74 module_param(lro_max_aggr, int, 0);
75 module_param(num_tx_qps, int, 0);
76
77 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
78 MODULE_PARM_DESC(msg_level, "msg_level");
79 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
80 "port to stack. 1:yes, 0:no. Default = 0 ");
81 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
82 "[2^x - 1], x = [6..14]. Default = "
83 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
84 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
85 "[2^x - 1], x = [6..14]. Default = "
86 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
87 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
88 "[2^x - 1], x = [6..14]. Default = "
89 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
90 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
91 "[2^x - 1], x = [6..14]. Default = "
92 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
93 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
94
95 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
96 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
97 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
98 "Default = 0");
99
100 static int port_name_cnt;
101 static LIST_HEAD(adapter_list);
102 static unsigned long ehea_driver_flags;
103 struct work_struct ehea_rereg_mr_task;
104 static DEFINE_MUTEX(dlpar_mem_lock);
105 struct ehea_fw_handle_array ehea_fw_handles;
106 struct ehea_bcmc_reg_array ehea_bcmc_regs;
107
108
109 static int __devinit ehea_probe_adapter(struct of_device *dev,
110 const struct of_device_id *id);
111
112 static int __devexit ehea_remove(struct of_device *dev);
113
114 static struct of_device_id ehea_device_table[] = {
115 {
116 .name = "lhea",
117 .compatible = "IBM,lhea",
118 },
119 {},
120 };
121 MODULE_DEVICE_TABLE(of, ehea_device_table);
122
123 static struct of_platform_driver ehea_driver = {
124 .name = "ehea",
125 .match_table = ehea_device_table,
126 .probe = ehea_probe_adapter,
127 .remove = ehea_remove,
128 };
129
ehea_dump(void * adr,int len,char * msg)130 void ehea_dump(void *adr, int len, char *msg)
131 {
132 int x;
133 unsigned char *deb = adr;
134 for (x = 0; x < len; x += 16) {
135 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
136 deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
137 deb += 16;
138 }
139 }
140
ehea_schedule_port_reset(struct ehea_port * port)141 void ehea_schedule_port_reset(struct ehea_port *port)
142 {
143 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
144 schedule_work(&port->reset_task);
145 }
146
ehea_update_firmware_handles(void)147 static void ehea_update_firmware_handles(void)
148 {
149 struct ehea_fw_handle_entry *arr = NULL;
150 struct ehea_adapter *adapter;
151 int num_adapters = 0;
152 int num_ports = 0;
153 int num_portres = 0;
154 int i = 0;
155 int num_fw_handles, k, l;
156
157 /* Determine number of handles */
158 list_for_each_entry(adapter, &adapter_list, list) {
159 num_adapters++;
160
161 for (k = 0; k < EHEA_MAX_PORTS; k++) {
162 struct ehea_port *port = adapter->port[k];
163
164 if (!port || (port->state != EHEA_PORT_UP))
165 continue;
166
167 num_ports++;
168 num_portres += port->num_def_qps + port->num_add_tx_qps;
169 }
170 }
171
172 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
173 num_ports * EHEA_NUM_PORT_FW_HANDLES +
174 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
175
176 if (num_fw_handles) {
177 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
178 if (!arr)
179 return; /* Keep the existing array */
180 } else
181 goto out_update;
182
183 list_for_each_entry(adapter, &adapter_list, list) {
184 for (k = 0; k < EHEA_MAX_PORTS; k++) {
185 struct ehea_port *port = adapter->port[k];
186
187 if (!port || (port->state != EHEA_PORT_UP))
188 continue;
189
190 for (l = 0;
191 l < port->num_def_qps + port->num_add_tx_qps;
192 l++) {
193 struct ehea_port_res *pr = &port->port_res[l];
194
195 arr[i].adh = adapter->handle;
196 arr[i++].fwh = pr->qp->fw_handle;
197 arr[i].adh = adapter->handle;
198 arr[i++].fwh = pr->send_cq->fw_handle;
199 arr[i].adh = adapter->handle;
200 arr[i++].fwh = pr->recv_cq->fw_handle;
201 arr[i].adh = adapter->handle;
202 arr[i++].fwh = pr->eq->fw_handle;
203 arr[i].adh = adapter->handle;
204 arr[i++].fwh = pr->send_mr.handle;
205 arr[i].adh = adapter->handle;
206 arr[i++].fwh = pr->recv_mr.handle;
207 }
208 arr[i].adh = adapter->handle;
209 arr[i++].fwh = port->qp_eq->fw_handle;
210 }
211
212 arr[i].adh = adapter->handle;
213 arr[i++].fwh = adapter->neq->fw_handle;
214
215 if (adapter->mr.handle) {
216 arr[i].adh = adapter->handle;
217 arr[i++].fwh = adapter->mr.handle;
218 }
219 }
220
221 out_update:
222 kfree(ehea_fw_handles.arr);
223 ehea_fw_handles.arr = arr;
224 ehea_fw_handles.num_entries = i;
225 }
226
ehea_update_bcmc_registrations(void)227 static void ehea_update_bcmc_registrations(void)
228 {
229 struct ehea_bcmc_reg_entry *arr = NULL;
230 struct ehea_adapter *adapter;
231 struct ehea_mc_list *mc_entry;
232 int num_registrations = 0;
233 int i = 0;
234 int k;
235
236 /* Determine number of registrations */
237 list_for_each_entry(adapter, &adapter_list, list)
238 for (k = 0; k < EHEA_MAX_PORTS; k++) {
239 struct ehea_port *port = adapter->port[k];
240
241 if (!port || (port->state != EHEA_PORT_UP))
242 continue;
243
244 num_registrations += 2; /* Broadcast registrations */
245
246 list_for_each_entry(mc_entry, &port->mc_list->list,list)
247 num_registrations += 2;
248 }
249
250 if (num_registrations) {
251 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
252 if (!arr)
253 return; /* Keep the existing array */
254 } else
255 goto out_update;
256
257 list_for_each_entry(adapter, &adapter_list, list) {
258 for (k = 0; k < EHEA_MAX_PORTS; k++) {
259 struct ehea_port *port = adapter->port[k];
260
261 if (!port || (port->state != EHEA_PORT_UP))
262 continue;
263
264 arr[i].adh = adapter->handle;
265 arr[i].port_id = port->logical_port_id;
266 arr[i].reg_type = EHEA_BCMC_BROADCAST |
267 EHEA_BCMC_UNTAGGED;
268 arr[i++].macaddr = port->mac_addr;
269
270 arr[i].adh = adapter->handle;
271 arr[i].port_id = port->logical_port_id;
272 arr[i].reg_type = EHEA_BCMC_BROADCAST |
273 EHEA_BCMC_VLANID_ALL;
274 arr[i++].macaddr = port->mac_addr;
275
276 list_for_each_entry(mc_entry,
277 &port->mc_list->list, list) {
278 arr[i].adh = adapter->handle;
279 arr[i].port_id = port->logical_port_id;
280 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
281 EHEA_BCMC_MULTICAST |
282 EHEA_BCMC_UNTAGGED;
283 arr[i++].macaddr = mc_entry->macaddr;
284
285 arr[i].adh = adapter->handle;
286 arr[i].port_id = port->logical_port_id;
287 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
288 EHEA_BCMC_MULTICAST |
289 EHEA_BCMC_VLANID_ALL;
290 arr[i++].macaddr = mc_entry->macaddr;
291 }
292 }
293 }
294
295 out_update:
296 kfree(ehea_bcmc_regs.arr);
297 ehea_bcmc_regs.arr = arr;
298 ehea_bcmc_regs.num_entries = i;
299 }
300
ehea_get_stats(struct net_device * dev)301 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
302 {
303 struct ehea_port *port = netdev_priv(dev);
304 struct net_device_stats *stats = &port->stats;
305 struct hcp_ehea_port_cb2 *cb2;
306 u64 hret, rx_packets, tx_packets;
307 int i;
308
309 memset(stats, 0, sizeof(*stats));
310
311 cb2 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
312 if (!cb2) {
313 ehea_error("no mem for cb2");
314 goto out;
315 }
316
317 hret = ehea_h_query_ehea_port(port->adapter->handle,
318 port->logical_port_id,
319 H_PORT_CB2, H_PORT_CB2_ALL, cb2);
320 if (hret != H_SUCCESS) {
321 ehea_error("query_ehea_port failed");
322 goto out_herr;
323 }
324
325 if (netif_msg_hw(port))
326 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
327
328 rx_packets = 0;
329 for (i = 0; i < port->num_def_qps; i++)
330 rx_packets += port->port_res[i].rx_packets;
331
332 tx_packets = 0;
333 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
334 tx_packets += port->port_res[i].tx_packets;
335
336 stats->tx_packets = tx_packets;
337 stats->multicast = cb2->rxmcp;
338 stats->rx_errors = cb2->rxuerr;
339 stats->rx_bytes = cb2->rxo;
340 stats->tx_bytes = cb2->txo;
341 stats->rx_packets = rx_packets;
342
343 out_herr:
344 kfree(cb2);
345 out:
346 return stats;
347 }
348
ehea_refill_rq1(struct ehea_port_res * pr,int index,int nr_of_wqes)349 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
350 {
351 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
352 struct net_device *dev = pr->port->netdev;
353 int max_index_mask = pr->rq1_skba.len - 1;
354 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
355 int adder = 0;
356 int i;
357
358 pr->rq1_skba.os_skbs = 0;
359
360 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
361 if (nr_of_wqes > 0)
362 pr->rq1_skba.index = index;
363 pr->rq1_skba.os_skbs = fill_wqes;
364 return;
365 }
366
367 for (i = 0; i < fill_wqes; i++) {
368 if (!skb_arr_rq1[index]) {
369 skb_arr_rq1[index] = netdev_alloc_skb(dev,
370 EHEA_L_PKT_SIZE);
371 if (!skb_arr_rq1[index]) {
372 pr->rq1_skba.os_skbs = fill_wqes - i;
373 ehea_error("%s: no mem for skb/%d wqes filled",
374 dev->name, i);
375 break;
376 }
377 }
378 index--;
379 index &= max_index_mask;
380 adder++;
381 }
382
383 if (adder == 0)
384 return;
385
386 /* Ring doorbell */
387 ehea_update_rq1a(pr->qp, adder);
388 }
389
ehea_init_fill_rq1(struct ehea_port_res * pr,int nr_rq1a)390 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
391 {
392 int ret = 0;
393 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
394 struct net_device *dev = pr->port->netdev;
395 int i;
396
397 for (i = 0; i < pr->rq1_skba.len; i++) {
398 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
399 if (!skb_arr_rq1[i]) {
400 ehea_error("%s: no mem for skb/%d wqes filled",
401 dev->name, i);
402 ret = -ENOMEM;
403 goto out;
404 }
405 }
406 /* Ring doorbell */
407 ehea_update_rq1a(pr->qp, nr_rq1a);
408 out:
409 return ret;
410 }
411
ehea_refill_rq_def(struct ehea_port_res * pr,struct ehea_q_skb_arr * q_skba,int rq_nr,int num_wqes,int wqe_type,int packet_size)412 static int ehea_refill_rq_def(struct ehea_port_res *pr,
413 struct ehea_q_skb_arr *q_skba, int rq_nr,
414 int num_wqes, int wqe_type, int packet_size)
415 {
416 struct net_device *dev = pr->port->netdev;
417 struct ehea_qp *qp = pr->qp;
418 struct sk_buff **skb_arr = q_skba->arr;
419 struct ehea_rwqe *rwqe;
420 int i, index, max_index_mask, fill_wqes;
421 int adder = 0;
422 int ret = 0;
423
424 fill_wqes = q_skba->os_skbs + num_wqes;
425 q_skba->os_skbs = 0;
426
427 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
428 q_skba->os_skbs = fill_wqes;
429 return ret;
430 }
431
432 index = q_skba->index;
433 max_index_mask = q_skba->len - 1;
434 for (i = 0; i < fill_wqes; i++) {
435 u64 tmp_addr;
436 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
437 if (!skb) {
438 ehea_error("%s: no mem for skb/%d wqes filled",
439 pr->port->netdev->name, i);
440 q_skba->os_skbs = fill_wqes - i;
441 ret = -ENOMEM;
442 break;
443 }
444 skb_reserve(skb, NET_IP_ALIGN);
445
446 skb_arr[index] = skb;
447 tmp_addr = ehea_map_vaddr(skb->data);
448 if (tmp_addr == -1) {
449 dev_kfree_skb(skb);
450 q_skba->os_skbs = fill_wqes - i;
451 ret = 0;
452 break;
453 }
454
455 rwqe = ehea_get_next_rwqe(qp, rq_nr);
456 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
457 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
458 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
459 rwqe->sg_list[0].vaddr = tmp_addr;
460 rwqe->sg_list[0].len = packet_size;
461 rwqe->data_segments = 1;
462
463 index++;
464 index &= max_index_mask;
465 adder++;
466 }
467
468 q_skba->index = index;
469 if (adder == 0)
470 goto out;
471
472 /* Ring doorbell */
473 iosync();
474 if (rq_nr == 2)
475 ehea_update_rq2a(pr->qp, adder);
476 else
477 ehea_update_rq3a(pr->qp, adder);
478 out:
479 return ret;
480 }
481
482
ehea_refill_rq2(struct ehea_port_res * pr,int nr_of_wqes)483 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
484 {
485 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
486 nr_of_wqes, EHEA_RWQE2_TYPE,
487 EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
488 }
489
490
ehea_refill_rq3(struct ehea_port_res * pr,int nr_of_wqes)491 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
492 {
493 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
494 nr_of_wqes, EHEA_RWQE3_TYPE,
495 EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
496 }
497
ehea_check_cqe(struct ehea_cqe * cqe,int * rq_num)498 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
499 {
500 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
501 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
502 return 0;
503 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
504 (cqe->header_length == 0))
505 return 0;
506 return -EINVAL;
507 }
508
ehea_fill_skb(struct net_device * dev,struct sk_buff * skb,struct ehea_cqe * cqe)509 static inline void ehea_fill_skb(struct net_device *dev,
510 struct sk_buff *skb, struct ehea_cqe *cqe)
511 {
512 int length = cqe->num_bytes_transfered - 4; /*remove CRC */
513
514 skb_put(skb, length);
515 skb->ip_summed = CHECKSUM_UNNECESSARY;
516 skb->protocol = eth_type_trans(skb, dev);
517 }
518
get_skb_by_index(struct sk_buff ** skb_array,int arr_len,struct ehea_cqe * cqe)519 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
520 int arr_len,
521 struct ehea_cqe *cqe)
522 {
523 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
524 struct sk_buff *skb;
525 void *pref;
526 int x;
527
528 x = skb_index + 1;
529 x &= (arr_len - 1);
530
531 pref = skb_array[x];
532 prefetchw(pref);
533 prefetchw(pref + EHEA_CACHE_LINE);
534
535 pref = (skb_array[x]->data);
536 prefetch(pref);
537 prefetch(pref + EHEA_CACHE_LINE);
538 prefetch(pref + EHEA_CACHE_LINE * 2);
539 prefetch(pref + EHEA_CACHE_LINE * 3);
540 skb = skb_array[skb_index];
541 skb_array[skb_index] = NULL;
542 return skb;
543 }
544
get_skb_by_index_ll(struct sk_buff ** skb_array,int arr_len,int wqe_index)545 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
546 int arr_len, int wqe_index)
547 {
548 struct sk_buff *skb;
549 void *pref;
550 int x;
551
552 x = wqe_index + 1;
553 x &= (arr_len - 1);
554
555 pref = skb_array[x];
556 prefetchw(pref);
557 prefetchw(pref + EHEA_CACHE_LINE);
558
559 pref = (skb_array[x]->data);
560 prefetchw(pref);
561 prefetchw(pref + EHEA_CACHE_LINE);
562
563 skb = skb_array[wqe_index];
564 skb_array[wqe_index] = NULL;
565 return skb;
566 }
567
ehea_treat_poll_error(struct ehea_port_res * pr,int rq,struct ehea_cqe * cqe,int * processed_rq2,int * processed_rq3)568 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
569 struct ehea_cqe *cqe, int *processed_rq2,
570 int *processed_rq3)
571 {
572 struct sk_buff *skb;
573
574 if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
575 pr->p_stats.err_tcp_cksum++;
576 if (cqe->status & EHEA_CQE_STAT_ERR_IP)
577 pr->p_stats.err_ip_cksum++;
578 if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
579 pr->p_stats.err_frame_crc++;
580
581 if (rq == 2) {
582 *processed_rq2 += 1;
583 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
584 dev_kfree_skb(skb);
585 } else if (rq == 3) {
586 *processed_rq3 += 1;
587 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
588 dev_kfree_skb(skb);
589 }
590
591 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
592 if (netif_msg_rx_err(pr->port)) {
593 ehea_error("Critical receive error for QP %d. "
594 "Resetting port.", pr->qp->init_attr.qp_nr);
595 ehea_dump(cqe, sizeof(*cqe), "CQE");
596 }
597 ehea_schedule_port_reset(pr->port);
598 return 1;
599 }
600
601 return 0;
602 }
603
get_skb_hdr(struct sk_buff * skb,void ** iphdr,void ** tcph,u64 * hdr_flags,void * priv)604 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
605 void **tcph, u64 *hdr_flags, void *priv)
606 {
607 struct ehea_cqe *cqe = priv;
608 unsigned int ip_len;
609 struct iphdr *iph;
610
611 /* non tcp/udp packets */
612 if (!cqe->header_length)
613 return -1;
614
615 /* non tcp packet */
616 skb_reset_network_header(skb);
617 iph = ip_hdr(skb);
618 if (iph->protocol != IPPROTO_TCP)
619 return -1;
620
621 ip_len = ip_hdrlen(skb);
622 skb_set_transport_header(skb, ip_len);
623 *tcph = tcp_hdr(skb);
624
625 /* check if ip header and tcp header are complete */
626 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
627 return -1;
628
629 *hdr_flags = LRO_IPV4 | LRO_TCP;
630 *iphdr = iph;
631
632 return 0;
633 }
634
ehea_proc_skb(struct ehea_port_res * pr,struct ehea_cqe * cqe,struct sk_buff * skb)635 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
636 struct sk_buff *skb)
637 {
638 int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
639 && pr->port->vgrp;
640
641 if (use_lro) {
642 if (vlan_extracted)
643 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
644 pr->port->vgrp,
645 cqe->vlan_tag,
646 cqe);
647 else
648 lro_receive_skb(&pr->lro_mgr, skb, cqe);
649 } else {
650 if (vlan_extracted)
651 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
652 cqe->vlan_tag);
653 else
654 netif_receive_skb(skb);
655 }
656 }
657
ehea_proc_rwqes(struct net_device * dev,struct ehea_port_res * pr,int budget)658 static int ehea_proc_rwqes(struct net_device *dev,
659 struct ehea_port_res *pr,
660 int budget)
661 {
662 struct ehea_port *port = pr->port;
663 struct ehea_qp *qp = pr->qp;
664 struct ehea_cqe *cqe;
665 struct sk_buff *skb;
666 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
667 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
668 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
669 int skb_arr_rq1_len = pr->rq1_skba.len;
670 int skb_arr_rq2_len = pr->rq2_skba.len;
671 int skb_arr_rq3_len = pr->rq3_skba.len;
672 int processed, processed_rq1, processed_rq2, processed_rq3;
673 int wqe_index, last_wqe_index, rq, port_reset;
674
675 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
676 last_wqe_index = 0;
677
678 cqe = ehea_poll_rq1(qp, &wqe_index);
679 while ((processed < budget) && cqe) {
680 ehea_inc_rq1(qp);
681 processed_rq1++;
682 processed++;
683 if (netif_msg_rx_status(port))
684 ehea_dump(cqe, sizeof(*cqe), "CQE");
685
686 last_wqe_index = wqe_index;
687 rmb();
688 if (!ehea_check_cqe(cqe, &rq)) {
689 if (rq == 1) {
690 /* LL RQ1 */
691 skb = get_skb_by_index_ll(skb_arr_rq1,
692 skb_arr_rq1_len,
693 wqe_index);
694 if (unlikely(!skb)) {
695 if (netif_msg_rx_err(port))
696 ehea_error("LL rq1: skb=NULL");
697
698 skb = netdev_alloc_skb(dev,
699 EHEA_L_PKT_SIZE);
700 if (!skb)
701 break;
702 }
703 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
704 cqe->num_bytes_transfered - 4);
705 ehea_fill_skb(dev, skb, cqe);
706 } else if (rq == 2) {
707 /* RQ2 */
708 skb = get_skb_by_index(skb_arr_rq2,
709 skb_arr_rq2_len, cqe);
710 if (unlikely(!skb)) {
711 if (netif_msg_rx_err(port))
712 ehea_error("rq2: skb=NULL");
713 break;
714 }
715 ehea_fill_skb(dev, skb, cqe);
716 processed_rq2++;
717 } else {
718 /* RQ3 */
719 skb = get_skb_by_index(skb_arr_rq3,
720 skb_arr_rq3_len, cqe);
721 if (unlikely(!skb)) {
722 if (netif_msg_rx_err(port))
723 ehea_error("rq3: skb=NULL");
724 break;
725 }
726 ehea_fill_skb(dev, skb, cqe);
727 processed_rq3++;
728 }
729
730 ehea_proc_skb(pr, cqe, skb);
731 } else {
732 pr->p_stats.poll_receive_errors++;
733 port_reset = ehea_treat_poll_error(pr, rq, cqe,
734 &processed_rq2,
735 &processed_rq3);
736 if (port_reset)
737 break;
738 }
739 cqe = ehea_poll_rq1(qp, &wqe_index);
740 }
741 if (use_lro)
742 lro_flush_all(&pr->lro_mgr);
743
744 pr->rx_packets += processed;
745
746 ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
747 ehea_refill_rq2(pr, processed_rq2);
748 ehea_refill_rq3(pr, processed_rq3);
749
750 return processed;
751 }
752
ehea_proc_cqes(struct ehea_port_res * pr,int my_quota)753 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
754 {
755 struct sk_buff *skb;
756 struct ehea_cq *send_cq = pr->send_cq;
757 struct ehea_cqe *cqe;
758 int quota = my_quota;
759 int cqe_counter = 0;
760 int swqe_av = 0;
761 int index;
762 unsigned long flags;
763
764 cqe = ehea_poll_cq(send_cq);
765 while (cqe && (quota > 0)) {
766 ehea_inc_cq(send_cq);
767
768 cqe_counter++;
769 rmb();
770 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
771 ehea_error("Send Completion Error: Resetting port");
772 if (netif_msg_tx_err(pr->port))
773 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
774 ehea_schedule_port_reset(pr->port);
775 break;
776 }
777
778 if (netif_msg_tx_done(pr->port))
779 ehea_dump(cqe, sizeof(*cqe), "CQE");
780
781 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
782 == EHEA_SWQE2_TYPE)) {
783
784 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
785 skb = pr->sq_skba.arr[index];
786 dev_kfree_skb(skb);
787 pr->sq_skba.arr[index] = NULL;
788 }
789
790 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
791 quota--;
792
793 cqe = ehea_poll_cq(send_cq);
794 };
795
796 ehea_update_feca(send_cq, cqe_counter);
797 atomic_add(swqe_av, &pr->swqe_avail);
798
799 spin_lock_irqsave(&pr->netif_queue, flags);
800
801 if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
802 >= pr->swqe_refill_th)) {
803 netif_wake_queue(pr->port->netdev);
804 pr->queue_stopped = 0;
805 }
806 spin_unlock_irqrestore(&pr->netif_queue, flags);
807
808 return cqe;
809 }
810
811 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
812 #define EHEA_POLL_MAX_CQES 65535
813
ehea_poll(struct napi_struct * napi,int budget)814 static int ehea_poll(struct napi_struct *napi, int budget)
815 {
816 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
817 napi);
818 struct net_device *dev = pr->port->netdev;
819 struct ehea_cqe *cqe;
820 struct ehea_cqe *cqe_skb = NULL;
821 int force_irq, wqe_index;
822 int rx = 0;
823
824 force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
825 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
826
827 if (!force_irq)
828 rx += ehea_proc_rwqes(dev, pr, budget - rx);
829
830 while ((rx != budget) || force_irq) {
831 pr->poll_counter = 0;
832 force_irq = 0;
833 netif_rx_complete(napi);
834 ehea_reset_cq_ep(pr->recv_cq);
835 ehea_reset_cq_ep(pr->send_cq);
836 ehea_reset_cq_n1(pr->recv_cq);
837 ehea_reset_cq_n1(pr->send_cq);
838 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
839 cqe_skb = ehea_poll_cq(pr->send_cq);
840
841 if (!cqe && !cqe_skb)
842 return rx;
843
844 if (!netif_rx_reschedule(napi))
845 return rx;
846
847 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
848 rx += ehea_proc_rwqes(dev, pr, budget - rx);
849 }
850
851 pr->poll_counter++;
852 return rx;
853 }
854
855 #ifdef CONFIG_NET_POLL_CONTROLLER
ehea_netpoll(struct net_device * dev)856 static void ehea_netpoll(struct net_device *dev)
857 {
858 struct ehea_port *port = netdev_priv(dev);
859 int i;
860
861 for (i = 0; i < port->num_def_qps; i++)
862 netif_rx_schedule(&port->port_res[i].napi);
863 }
864 #endif
865
ehea_recv_irq_handler(int irq,void * param)866 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
867 {
868 struct ehea_port_res *pr = param;
869
870 netif_rx_schedule(&pr->napi);
871
872 return IRQ_HANDLED;
873 }
874
ehea_qp_aff_irq_handler(int irq,void * param)875 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
876 {
877 struct ehea_port *port = param;
878 struct ehea_eqe *eqe;
879 struct ehea_qp *qp;
880 u32 qp_token;
881
882 eqe = ehea_poll_eq(port->qp_eq);
883
884 while (eqe) {
885 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
886 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
887 eqe->entry, qp_token);
888
889 qp = port->port_res[qp_token].qp;
890 ehea_error_data(port->adapter, qp->fw_handle);
891 eqe = ehea_poll_eq(port->qp_eq);
892 }
893
894 ehea_schedule_port_reset(port);
895
896 return IRQ_HANDLED;
897 }
898
ehea_get_port(struct ehea_adapter * adapter,int logical_port)899 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
900 int logical_port)
901 {
902 int i;
903
904 for (i = 0; i < EHEA_MAX_PORTS; i++)
905 if (adapter->port[i])
906 if (adapter->port[i]->logical_port_id == logical_port)
907 return adapter->port[i];
908 return NULL;
909 }
910
ehea_sense_port_attr(struct ehea_port * port)911 int ehea_sense_port_attr(struct ehea_port *port)
912 {
913 int ret;
914 u64 hret;
915 struct hcp_ehea_port_cb0 *cb0;
916
917 /* may be called via ehea_neq_tasklet() */
918 cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
919 if (!cb0) {
920 ehea_error("no mem for cb0");
921 ret = -ENOMEM;
922 goto out;
923 }
924
925 hret = ehea_h_query_ehea_port(port->adapter->handle,
926 port->logical_port_id, H_PORT_CB0,
927 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
928 cb0);
929 if (hret != H_SUCCESS) {
930 ret = -EIO;
931 goto out_free;
932 }
933
934 /* MAC address */
935 port->mac_addr = cb0->port_mac_addr << 16;
936
937 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
938 ret = -EADDRNOTAVAIL;
939 goto out_free;
940 }
941
942 /* Port speed */
943 switch (cb0->port_speed) {
944 case H_SPEED_10M_H:
945 port->port_speed = EHEA_SPEED_10M;
946 port->full_duplex = 0;
947 break;
948 case H_SPEED_10M_F:
949 port->port_speed = EHEA_SPEED_10M;
950 port->full_duplex = 1;
951 break;
952 case H_SPEED_100M_H:
953 port->port_speed = EHEA_SPEED_100M;
954 port->full_duplex = 0;
955 break;
956 case H_SPEED_100M_F:
957 port->port_speed = EHEA_SPEED_100M;
958 port->full_duplex = 1;
959 break;
960 case H_SPEED_1G_F:
961 port->port_speed = EHEA_SPEED_1G;
962 port->full_duplex = 1;
963 break;
964 case H_SPEED_10G_F:
965 port->port_speed = EHEA_SPEED_10G;
966 port->full_duplex = 1;
967 break;
968 default:
969 port->port_speed = 0;
970 port->full_duplex = 0;
971 break;
972 }
973
974 port->autoneg = 1;
975 port->num_mcs = cb0->num_default_qps;
976
977 /* Number of default QPs */
978 if (use_mcs)
979 port->num_def_qps = cb0->num_default_qps;
980 else
981 port->num_def_qps = 1;
982
983 if (!port->num_def_qps) {
984 ret = -EINVAL;
985 goto out_free;
986 }
987
988 port->num_tx_qps = num_tx_qps;
989
990 if (port->num_def_qps >= port->num_tx_qps)
991 port->num_add_tx_qps = 0;
992 else
993 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
994
995 ret = 0;
996 out_free:
997 if (ret || netif_msg_probe(port))
998 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
999 kfree(cb0);
1000 out:
1001 return ret;
1002 }
1003
ehea_set_portspeed(struct ehea_port * port,u32 port_speed)1004 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1005 {
1006 struct hcp_ehea_port_cb4 *cb4;
1007 u64 hret;
1008 int ret = 0;
1009
1010 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1011 if (!cb4) {
1012 ehea_error("no mem for cb4");
1013 ret = -ENOMEM;
1014 goto out;
1015 }
1016
1017 cb4->port_speed = port_speed;
1018
1019 netif_carrier_off(port->netdev);
1020
1021 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1022 port->logical_port_id,
1023 H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1024 if (hret == H_SUCCESS) {
1025 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1026
1027 hret = ehea_h_query_ehea_port(port->adapter->handle,
1028 port->logical_port_id,
1029 H_PORT_CB4, H_PORT_CB4_SPEED,
1030 cb4);
1031 if (hret == H_SUCCESS) {
1032 switch (cb4->port_speed) {
1033 case H_SPEED_10M_H:
1034 port->port_speed = EHEA_SPEED_10M;
1035 port->full_duplex = 0;
1036 break;
1037 case H_SPEED_10M_F:
1038 port->port_speed = EHEA_SPEED_10M;
1039 port->full_duplex = 1;
1040 break;
1041 case H_SPEED_100M_H:
1042 port->port_speed = EHEA_SPEED_100M;
1043 port->full_duplex = 0;
1044 break;
1045 case H_SPEED_100M_F:
1046 port->port_speed = EHEA_SPEED_100M;
1047 port->full_duplex = 1;
1048 break;
1049 case H_SPEED_1G_F:
1050 port->port_speed = EHEA_SPEED_1G;
1051 port->full_duplex = 1;
1052 break;
1053 case H_SPEED_10G_F:
1054 port->port_speed = EHEA_SPEED_10G;
1055 port->full_duplex = 1;
1056 break;
1057 default:
1058 port->port_speed = 0;
1059 port->full_duplex = 0;
1060 break;
1061 }
1062 } else {
1063 ehea_error("Failed sensing port speed");
1064 ret = -EIO;
1065 }
1066 } else {
1067 if (hret == H_AUTHORITY) {
1068 ehea_info("Hypervisor denied setting port speed");
1069 ret = -EPERM;
1070 } else {
1071 ret = -EIO;
1072 ehea_error("Failed setting port speed");
1073 }
1074 }
1075 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1076 netif_carrier_on(port->netdev);
1077
1078 kfree(cb4);
1079 out:
1080 return ret;
1081 }
1082
ehea_parse_eqe(struct ehea_adapter * adapter,u64 eqe)1083 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1084 {
1085 int ret;
1086 u8 ec;
1087 u8 portnum;
1088 struct ehea_port *port;
1089
1090 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1091 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1092 port = ehea_get_port(adapter, portnum);
1093
1094 switch (ec) {
1095 case EHEA_EC_PORTSTATE_CHG: /* port state change */
1096
1097 if (!port) {
1098 ehea_error("unknown portnum %x", portnum);
1099 break;
1100 }
1101
1102 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1103 if (!netif_carrier_ok(port->netdev)) {
1104 ret = ehea_sense_port_attr(port);
1105 if (ret) {
1106 ehea_error("failed resensing port "
1107 "attributes");
1108 break;
1109 }
1110
1111 if (netif_msg_link(port))
1112 ehea_info("%s: Logical port up: %dMbps "
1113 "%s Duplex",
1114 port->netdev->name,
1115 port->port_speed,
1116 port->full_duplex ==
1117 1 ? "Full" : "Half");
1118
1119 netif_carrier_on(port->netdev);
1120 netif_wake_queue(port->netdev);
1121 }
1122 } else
1123 if (netif_carrier_ok(port->netdev)) {
1124 if (netif_msg_link(port))
1125 ehea_info("%s: Logical port down",
1126 port->netdev->name);
1127 netif_carrier_off(port->netdev);
1128 netif_stop_queue(port->netdev);
1129 }
1130
1131 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1132 port->phy_link = EHEA_PHY_LINK_UP;
1133 if (netif_msg_link(port))
1134 ehea_info("%s: Physical port up",
1135 port->netdev->name);
1136 if (prop_carrier_state)
1137 netif_carrier_on(port->netdev);
1138 } else {
1139 port->phy_link = EHEA_PHY_LINK_DOWN;
1140 if (netif_msg_link(port))
1141 ehea_info("%s: Physical port down",
1142 port->netdev->name);
1143 if (prop_carrier_state)
1144 netif_carrier_off(port->netdev);
1145 }
1146
1147 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1148 ehea_info("External switch port is primary port");
1149 else
1150 ehea_info("External switch port is backup port");
1151
1152 break;
1153 case EHEA_EC_ADAPTER_MALFUNC:
1154 ehea_error("Adapter malfunction");
1155 break;
1156 case EHEA_EC_PORT_MALFUNC:
1157 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1158 netif_carrier_off(port->netdev);
1159 netif_stop_queue(port->netdev);
1160 break;
1161 default:
1162 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1163 break;
1164 }
1165 }
1166
ehea_neq_tasklet(unsigned long data)1167 static void ehea_neq_tasklet(unsigned long data)
1168 {
1169 struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1170 struct ehea_eqe *eqe;
1171 u64 event_mask;
1172
1173 eqe = ehea_poll_eq(adapter->neq);
1174 ehea_debug("eqe=%p", eqe);
1175
1176 while (eqe) {
1177 ehea_debug("*eqe=%lx", eqe->entry);
1178 ehea_parse_eqe(adapter, eqe->entry);
1179 eqe = ehea_poll_eq(adapter->neq);
1180 ehea_debug("next eqe=%p", eqe);
1181 }
1182
1183 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1184 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1185 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1186
1187 ehea_h_reset_events(adapter->handle,
1188 adapter->neq->fw_handle, event_mask);
1189 }
1190
ehea_interrupt_neq(int irq,void * param)1191 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1192 {
1193 struct ehea_adapter *adapter = param;
1194 tasklet_hi_schedule(&adapter->neq_tasklet);
1195 return IRQ_HANDLED;
1196 }
1197
1198
ehea_fill_port_res(struct ehea_port_res * pr)1199 static int ehea_fill_port_res(struct ehea_port_res *pr)
1200 {
1201 int ret;
1202 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1203
1204 ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1205 - init_attr->act_nr_rwqes_rq2
1206 - init_attr->act_nr_rwqes_rq3 - 1);
1207
1208 ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1209
1210 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1211
1212 return ret;
1213 }
1214
ehea_reg_interrupts(struct net_device * dev)1215 static int ehea_reg_interrupts(struct net_device *dev)
1216 {
1217 struct ehea_port *port = netdev_priv(dev);
1218 struct ehea_port_res *pr;
1219 int i, ret;
1220
1221
1222 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1223 dev->name);
1224
1225 ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1226 ehea_qp_aff_irq_handler,
1227 IRQF_DISABLED, port->int_aff_name, port);
1228 if (ret) {
1229 ehea_error("failed registering irq for qp_aff_irq_handler:"
1230 "ist=%X", port->qp_eq->attr.ist1);
1231 goto out_free_qpeq;
1232 }
1233
1234 if (netif_msg_ifup(port))
1235 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1236 "registered", port->qp_eq->attr.ist1);
1237
1238
1239 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1240 pr = &port->port_res[i];
1241 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1242 "%s-queue%d", dev->name, i);
1243 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1244 ehea_recv_irq_handler,
1245 IRQF_DISABLED, pr->int_send_name,
1246 pr);
1247 if (ret) {
1248 ehea_error("failed registering irq for ehea_queue "
1249 "port_res_nr:%d, ist=%X", i,
1250 pr->eq->attr.ist1);
1251 goto out_free_req;
1252 }
1253 if (netif_msg_ifup(port))
1254 ehea_info("irq_handle 0x%X for function ehea_queue_int "
1255 "%d registered", pr->eq->attr.ist1, i);
1256 }
1257 out:
1258 return ret;
1259
1260
1261 out_free_req:
1262 while (--i >= 0) {
1263 u32 ist = port->port_res[i].eq->attr.ist1;
1264 ibmebus_free_irq(ist, &port->port_res[i]);
1265 }
1266
1267 out_free_qpeq:
1268 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1269 i = port->num_def_qps;
1270
1271 goto out;
1272
1273 }
1274
ehea_free_interrupts(struct net_device * dev)1275 static void ehea_free_interrupts(struct net_device *dev)
1276 {
1277 struct ehea_port *port = netdev_priv(dev);
1278 struct ehea_port_res *pr;
1279 int i;
1280
1281 /* send */
1282
1283 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1284 pr = &port->port_res[i];
1285 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1286 if (netif_msg_intr(port))
1287 ehea_info("free send irq for res %d with handle 0x%X",
1288 i, pr->eq->attr.ist1);
1289 }
1290
1291 /* associated events */
1292 ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1293 if (netif_msg_intr(port))
1294 ehea_info("associated event interrupt for handle 0x%X freed",
1295 port->qp_eq->attr.ist1);
1296 }
1297
ehea_configure_port(struct ehea_port * port)1298 static int ehea_configure_port(struct ehea_port *port)
1299 {
1300 int ret, i;
1301 u64 hret, mask;
1302 struct hcp_ehea_port_cb0 *cb0;
1303
1304 ret = -ENOMEM;
1305 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1306 if (!cb0)
1307 goto out;
1308
1309 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1310 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1311 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1312 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1313 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1314 PXLY_RC_VLAN_FILTER)
1315 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1316
1317 for (i = 0; i < port->num_mcs; i++)
1318 if (use_mcs)
1319 cb0->default_qpn_arr[i] =
1320 port->port_res[i].qp->init_attr.qp_nr;
1321 else
1322 cb0->default_qpn_arr[i] =
1323 port->port_res[0].qp->init_attr.qp_nr;
1324
1325 if (netif_msg_ifup(port))
1326 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1327
1328 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1329 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1330
1331 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1332 port->logical_port_id,
1333 H_PORT_CB0, mask, cb0);
1334 ret = -EIO;
1335 if (hret != H_SUCCESS)
1336 goto out_free;
1337
1338 ret = 0;
1339
1340 out_free:
1341 kfree(cb0);
1342 out:
1343 return ret;
1344 }
1345
ehea_gen_smrs(struct ehea_port_res * pr)1346 int ehea_gen_smrs(struct ehea_port_res *pr)
1347 {
1348 int ret;
1349 struct ehea_adapter *adapter = pr->port->adapter;
1350
1351 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1352 if (ret)
1353 goto out;
1354
1355 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1356 if (ret)
1357 goto out_free;
1358
1359 return 0;
1360
1361 out_free:
1362 ehea_rem_mr(&pr->send_mr);
1363 out:
1364 ehea_error("Generating SMRS failed\n");
1365 return -EIO;
1366 }
1367
ehea_rem_smrs(struct ehea_port_res * pr)1368 int ehea_rem_smrs(struct ehea_port_res *pr)
1369 {
1370 if ((ehea_rem_mr(&pr->send_mr))
1371 || (ehea_rem_mr(&pr->recv_mr)))
1372 return -EIO;
1373 else
1374 return 0;
1375 }
1376
ehea_init_q_skba(struct ehea_q_skb_arr * q_skba,int max_q_entries)1377 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1378 {
1379 int arr_size = sizeof(void *) * max_q_entries;
1380
1381 q_skba->arr = vmalloc(arr_size);
1382 if (!q_skba->arr)
1383 return -ENOMEM;
1384
1385 memset(q_skba->arr, 0, arr_size);
1386
1387 q_skba->len = max_q_entries;
1388 q_skba->index = 0;
1389 q_skba->os_skbs = 0;
1390
1391 return 0;
1392 }
1393
ehea_init_port_res(struct ehea_port * port,struct ehea_port_res * pr,struct port_res_cfg * pr_cfg,int queue_token)1394 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1395 struct port_res_cfg *pr_cfg, int queue_token)
1396 {
1397 struct ehea_adapter *adapter = port->adapter;
1398 enum ehea_eq_type eq_type = EHEA_EQ;
1399 struct ehea_qp_init_attr *init_attr = NULL;
1400 int ret = -EIO;
1401
1402 memset(pr, 0, sizeof(struct ehea_port_res));
1403
1404 pr->port = port;
1405 spin_lock_init(&pr->xmit_lock);
1406 spin_lock_init(&pr->netif_queue);
1407
1408 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1409 if (!pr->eq) {
1410 ehea_error("create_eq failed (eq)");
1411 goto out_free;
1412 }
1413
1414 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1415 pr->eq->fw_handle,
1416 port->logical_port_id);
1417 if (!pr->recv_cq) {
1418 ehea_error("create_cq failed (cq_recv)");
1419 goto out_free;
1420 }
1421
1422 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1423 pr->eq->fw_handle,
1424 port->logical_port_id);
1425 if (!pr->send_cq) {
1426 ehea_error("create_cq failed (cq_send)");
1427 goto out_free;
1428 }
1429
1430 if (netif_msg_ifup(port))
1431 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1432 pr->send_cq->attr.act_nr_of_cqes,
1433 pr->recv_cq->attr.act_nr_of_cqes);
1434
1435 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1436 if (!init_attr) {
1437 ret = -ENOMEM;
1438 ehea_error("no mem for ehea_qp_init_attr");
1439 goto out_free;
1440 }
1441
1442 init_attr->low_lat_rq1 = 1;
1443 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
1444 init_attr->rq_count = 3;
1445 init_attr->qp_token = queue_token;
1446 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1447 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1448 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1449 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1450 init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1451 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1452 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1453 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1454 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1455 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1456 init_attr->port_nr = port->logical_port_id;
1457 init_attr->send_cq_handle = pr->send_cq->fw_handle;
1458 init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1459 init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1460
1461 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1462 if (!pr->qp) {
1463 ehea_error("create_qp failed");
1464 ret = -EIO;
1465 goto out_free;
1466 }
1467
1468 if (netif_msg_ifup(port))
1469 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1470 "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1471 init_attr->act_nr_send_wqes,
1472 init_attr->act_nr_rwqes_rq1,
1473 init_attr->act_nr_rwqes_rq2,
1474 init_attr->act_nr_rwqes_rq3);
1475
1476 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1477
1478 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1479 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1480 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1481 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1482 if (ret)
1483 goto out_free;
1484
1485 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1486 if (ehea_gen_smrs(pr) != 0) {
1487 ret = -EIO;
1488 goto out_free;
1489 }
1490
1491 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1492
1493 kfree(init_attr);
1494
1495 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1496
1497 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1498 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1499 pr->lro_mgr.lro_arr = pr->lro_desc;
1500 pr->lro_mgr.get_skb_header = get_skb_hdr;
1501 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1502 pr->lro_mgr.dev = port->netdev;
1503 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1504 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1505
1506 ret = 0;
1507 goto out;
1508
1509 out_free:
1510 kfree(init_attr);
1511 vfree(pr->sq_skba.arr);
1512 vfree(pr->rq1_skba.arr);
1513 vfree(pr->rq2_skba.arr);
1514 vfree(pr->rq3_skba.arr);
1515 ehea_destroy_qp(pr->qp);
1516 ehea_destroy_cq(pr->send_cq);
1517 ehea_destroy_cq(pr->recv_cq);
1518 ehea_destroy_eq(pr->eq);
1519 out:
1520 return ret;
1521 }
1522
ehea_clean_portres(struct ehea_port * port,struct ehea_port_res * pr)1523 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1524 {
1525 int ret, i;
1526
1527 ret = ehea_destroy_qp(pr->qp);
1528
1529 if (!ret) {
1530 ehea_destroy_cq(pr->send_cq);
1531 ehea_destroy_cq(pr->recv_cq);
1532 ehea_destroy_eq(pr->eq);
1533
1534 for (i = 0; i < pr->rq1_skba.len; i++)
1535 if (pr->rq1_skba.arr[i])
1536 dev_kfree_skb(pr->rq1_skba.arr[i]);
1537
1538 for (i = 0; i < pr->rq2_skba.len; i++)
1539 if (pr->rq2_skba.arr[i])
1540 dev_kfree_skb(pr->rq2_skba.arr[i]);
1541
1542 for (i = 0; i < pr->rq3_skba.len; i++)
1543 if (pr->rq3_skba.arr[i])
1544 dev_kfree_skb(pr->rq3_skba.arr[i]);
1545
1546 for (i = 0; i < pr->sq_skba.len; i++)
1547 if (pr->sq_skba.arr[i])
1548 dev_kfree_skb(pr->sq_skba.arr[i]);
1549
1550 vfree(pr->rq1_skba.arr);
1551 vfree(pr->rq2_skba.arr);
1552 vfree(pr->rq3_skba.arr);
1553 vfree(pr->sq_skba.arr);
1554 ret = ehea_rem_smrs(pr);
1555 }
1556 return ret;
1557 }
1558
1559 /*
1560 * The write_* functions store information in swqe which is used by
1561 * the hardware to calculate the ip/tcp/udp checksum
1562 */
1563
write_ip_start_end(struct ehea_swqe * swqe,const struct sk_buff * skb)1564 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1565 const struct sk_buff *skb)
1566 {
1567 swqe->ip_start = skb_network_offset(skb);
1568 swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1569 }
1570
write_tcp_offset_end(struct ehea_swqe * swqe,const struct sk_buff * skb)1571 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1572 const struct sk_buff *skb)
1573 {
1574 swqe->tcp_offset =
1575 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1576
1577 swqe->tcp_end = (u16)skb->len - 1;
1578 }
1579
write_udp_offset_end(struct ehea_swqe * swqe,const struct sk_buff * skb)1580 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1581 const struct sk_buff *skb)
1582 {
1583 swqe->tcp_offset =
1584 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1585
1586 swqe->tcp_end = (u16)skb->len - 1;
1587 }
1588
1589
write_swqe2_TSO(struct sk_buff * skb,struct ehea_swqe * swqe,u32 lkey)1590 static void write_swqe2_TSO(struct sk_buff *skb,
1591 struct ehea_swqe *swqe, u32 lkey)
1592 {
1593 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1594 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1595 int skb_data_size = skb->len - skb->data_len;
1596 int headersize;
1597
1598 /* Packet is TCP with TSO enabled */
1599 swqe->tx_control |= EHEA_SWQE_TSO;
1600 swqe->mss = skb_shinfo(skb)->gso_size;
1601 /* copy only eth/ip/tcp headers to immediate data and
1602 * the rest of skb->data to sg1entry
1603 */
1604 headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1605
1606 skb_data_size = skb->len - skb->data_len;
1607
1608 if (skb_data_size >= headersize) {
1609 /* copy immediate data */
1610 skb_copy_from_linear_data(skb, imm_data, headersize);
1611 swqe->immediate_data_length = headersize;
1612
1613 if (skb_data_size > headersize) {
1614 /* set sg1entry data */
1615 sg1entry->l_key = lkey;
1616 sg1entry->len = skb_data_size - headersize;
1617 sg1entry->vaddr =
1618 ehea_map_vaddr(skb->data + headersize);
1619 swqe->descriptors++;
1620 }
1621 } else
1622 ehea_error("cannot handle fragmented headers");
1623 }
1624
write_swqe2_nonTSO(struct sk_buff * skb,struct ehea_swqe * swqe,u32 lkey)1625 static void write_swqe2_nonTSO(struct sk_buff *skb,
1626 struct ehea_swqe *swqe, u32 lkey)
1627 {
1628 int skb_data_size = skb->len - skb->data_len;
1629 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1630 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1631
1632 /* Packet is any nonTSO type
1633 *
1634 * Copy as much as possible skb->data to immediate data and
1635 * the rest to sg1entry
1636 */
1637 if (skb_data_size >= SWQE2_MAX_IMM) {
1638 /* copy immediate data */
1639 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1640
1641 swqe->immediate_data_length = SWQE2_MAX_IMM;
1642
1643 if (skb_data_size > SWQE2_MAX_IMM) {
1644 /* copy sg1entry data */
1645 sg1entry->l_key = lkey;
1646 sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1647 sg1entry->vaddr =
1648 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1649 swqe->descriptors++;
1650 }
1651 } else {
1652 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1653 swqe->immediate_data_length = skb_data_size;
1654 }
1655 }
1656
write_swqe2_data(struct sk_buff * skb,struct net_device * dev,struct ehea_swqe * swqe,u32 lkey)1657 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1658 struct ehea_swqe *swqe, u32 lkey)
1659 {
1660 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1661 skb_frag_t *frag;
1662 int nfrags, sg1entry_contains_frag_data, i;
1663
1664 nfrags = skb_shinfo(skb)->nr_frags;
1665 sg1entry = &swqe->u.immdata_desc.sg_entry;
1666 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1667 swqe->descriptors = 0;
1668 sg1entry_contains_frag_data = 0;
1669
1670 if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1671 write_swqe2_TSO(skb, swqe, lkey);
1672 else
1673 write_swqe2_nonTSO(skb, swqe, lkey);
1674
1675 /* write descriptors */
1676 if (nfrags > 0) {
1677 if (swqe->descriptors == 0) {
1678 /* sg1entry not yet used */
1679 frag = &skb_shinfo(skb)->frags[0];
1680
1681 /* copy sg1entry data */
1682 sg1entry->l_key = lkey;
1683 sg1entry->len = frag->size;
1684 sg1entry->vaddr =
1685 ehea_map_vaddr(page_address(frag->page)
1686 + frag->page_offset);
1687 swqe->descriptors++;
1688 sg1entry_contains_frag_data = 1;
1689 }
1690
1691 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1692
1693 frag = &skb_shinfo(skb)->frags[i];
1694 sgentry = &sg_list[i - sg1entry_contains_frag_data];
1695
1696 sgentry->l_key = lkey;
1697 sgentry->len = frag->size;
1698 sgentry->vaddr =
1699 ehea_map_vaddr(page_address(frag->page)
1700 + frag->page_offset);
1701 swqe->descriptors++;
1702 }
1703 }
1704 }
1705
ehea_broadcast_reg_helper(struct ehea_port * port,u32 hcallid)1706 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1707 {
1708 int ret = 0;
1709 u64 hret;
1710 u8 reg_type;
1711
1712 /* De/Register untagged packets */
1713 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1714 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1715 port->logical_port_id,
1716 reg_type, port->mac_addr, 0, hcallid);
1717 if (hret != H_SUCCESS) {
1718 ehea_error("%sregistering bc address failed (tagged)",
1719 hcallid == H_REG_BCMC ? "" : "de");
1720 ret = -EIO;
1721 goto out_herr;
1722 }
1723
1724 /* De/Register VLAN packets */
1725 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1726 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1727 port->logical_port_id,
1728 reg_type, port->mac_addr, 0, hcallid);
1729 if (hret != H_SUCCESS) {
1730 ehea_error("%sregistering bc address failed (vlan)",
1731 hcallid == H_REG_BCMC ? "" : "de");
1732 ret = -EIO;
1733 }
1734 out_herr:
1735 return ret;
1736 }
1737
ehea_set_mac_addr(struct net_device * dev,void * sa)1738 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1739 {
1740 struct ehea_port *port = netdev_priv(dev);
1741 struct sockaddr *mac_addr = sa;
1742 struct hcp_ehea_port_cb0 *cb0;
1743 int ret;
1744 u64 hret;
1745
1746 if (!is_valid_ether_addr(mac_addr->sa_data)) {
1747 ret = -EADDRNOTAVAIL;
1748 goto out;
1749 }
1750
1751 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1752 if (!cb0) {
1753 ehea_error("no mem for cb0");
1754 ret = -ENOMEM;
1755 goto out;
1756 }
1757
1758 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1759
1760 cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1761
1762 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1763 port->logical_port_id, H_PORT_CB0,
1764 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1765 if (hret != H_SUCCESS) {
1766 ret = -EIO;
1767 goto out_free;
1768 }
1769
1770 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1771
1772 spin_lock(&ehea_bcmc_regs.lock);
1773
1774 /* Deregister old MAC in pHYP */
1775 if (port->state == EHEA_PORT_UP) {
1776 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1777 if (ret)
1778 goto out_upregs;
1779 }
1780
1781 port->mac_addr = cb0->port_mac_addr << 16;
1782
1783 /* Register new MAC in pHYP */
1784 if (port->state == EHEA_PORT_UP) {
1785 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1786 if (ret)
1787 goto out_upregs;
1788 }
1789
1790 ret = 0;
1791
1792 out_upregs:
1793 ehea_update_bcmc_registrations();
1794 spin_unlock(&ehea_bcmc_regs.lock);
1795 out_free:
1796 kfree(cb0);
1797 out:
1798 return ret;
1799 }
1800
ehea_promiscuous_error(u64 hret,int enable)1801 static void ehea_promiscuous_error(u64 hret, int enable)
1802 {
1803 if (hret == H_AUTHORITY)
1804 ehea_info("Hypervisor denied %sabling promiscuous mode",
1805 enable == 1 ? "en" : "dis");
1806 else
1807 ehea_error("failed %sabling promiscuous mode",
1808 enable == 1 ? "en" : "dis");
1809 }
1810
ehea_promiscuous(struct net_device * dev,int enable)1811 static void ehea_promiscuous(struct net_device *dev, int enable)
1812 {
1813 struct ehea_port *port = netdev_priv(dev);
1814 struct hcp_ehea_port_cb7 *cb7;
1815 u64 hret;
1816
1817 if ((enable && port->promisc) || (!enable && !port->promisc))
1818 return;
1819
1820 cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1821 if (!cb7) {
1822 ehea_error("no mem for cb7");
1823 goto out;
1824 }
1825
1826 /* Modify Pxs_DUCQPN in CB7 */
1827 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1828
1829 hret = ehea_h_modify_ehea_port(port->adapter->handle,
1830 port->logical_port_id,
1831 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1832 if (hret) {
1833 ehea_promiscuous_error(hret, enable);
1834 goto out;
1835 }
1836
1837 port->promisc = enable;
1838 out:
1839 kfree(cb7);
1840 return;
1841 }
1842
ehea_multicast_reg_helper(struct ehea_port * port,u64 mc_mac_addr,u32 hcallid)1843 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1844 u32 hcallid)
1845 {
1846 u64 hret;
1847 u8 reg_type;
1848
1849 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1850 | EHEA_BCMC_UNTAGGED;
1851
1852 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1853 port->logical_port_id,
1854 reg_type, mc_mac_addr, 0, hcallid);
1855 if (hret)
1856 goto out;
1857
1858 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1859 | EHEA_BCMC_VLANID_ALL;
1860
1861 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1862 port->logical_port_id,
1863 reg_type, mc_mac_addr, 0, hcallid);
1864 out:
1865 return hret;
1866 }
1867
ehea_drop_multicast_list(struct net_device * dev)1868 static int ehea_drop_multicast_list(struct net_device *dev)
1869 {
1870 struct ehea_port *port = netdev_priv(dev);
1871 struct ehea_mc_list *mc_entry = port->mc_list;
1872 struct list_head *pos;
1873 struct list_head *temp;
1874 int ret = 0;
1875 u64 hret;
1876
1877 list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1878 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1879
1880 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1881 H_DEREG_BCMC);
1882 if (hret) {
1883 ehea_error("failed deregistering mcast MAC");
1884 ret = -EIO;
1885 }
1886
1887 list_del(pos);
1888 kfree(mc_entry);
1889 }
1890 return ret;
1891 }
1892
ehea_allmulti(struct net_device * dev,int enable)1893 static void ehea_allmulti(struct net_device *dev, int enable)
1894 {
1895 struct ehea_port *port = netdev_priv(dev);
1896 u64 hret;
1897
1898 if (!port->allmulti) {
1899 if (enable) {
1900 /* Enable ALLMULTI */
1901 ehea_drop_multicast_list(dev);
1902 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1903 if (!hret)
1904 port->allmulti = 1;
1905 else
1906 ehea_error("failed enabling IFF_ALLMULTI");
1907 }
1908 } else
1909 if (!enable) {
1910 /* Disable ALLMULTI */
1911 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1912 if (!hret)
1913 port->allmulti = 0;
1914 else
1915 ehea_error("failed disabling IFF_ALLMULTI");
1916 }
1917 }
1918
ehea_add_multicast_entry(struct ehea_port * port,u8 * mc_mac_addr)1919 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1920 {
1921 struct ehea_mc_list *ehea_mcl_entry;
1922 u64 hret;
1923
1924 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1925 if (!ehea_mcl_entry) {
1926 ehea_error("no mem for mcl_entry");
1927 return;
1928 }
1929
1930 INIT_LIST_HEAD(&ehea_mcl_entry->list);
1931
1932 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1933
1934 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1935 H_REG_BCMC);
1936 if (!hret)
1937 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1938 else {
1939 ehea_error("failed registering mcast MAC");
1940 kfree(ehea_mcl_entry);
1941 }
1942 }
1943
ehea_set_multicast_list(struct net_device * dev)1944 static void ehea_set_multicast_list(struct net_device *dev)
1945 {
1946 struct ehea_port *port = netdev_priv(dev);
1947 struct dev_mc_list *k_mcl_entry;
1948 int ret, i;
1949
1950 if (dev->flags & IFF_PROMISC) {
1951 ehea_promiscuous(dev, 1);
1952 return;
1953 }
1954 ehea_promiscuous(dev, 0);
1955
1956 spin_lock(&ehea_bcmc_regs.lock);
1957
1958 if (dev->flags & IFF_ALLMULTI) {
1959 ehea_allmulti(dev, 1);
1960 goto out;
1961 }
1962 ehea_allmulti(dev, 0);
1963
1964 if (dev->mc_count) {
1965 ret = ehea_drop_multicast_list(dev);
1966 if (ret) {
1967 /* Dropping the current multicast list failed.
1968 * Enabling ALL_MULTI is the best we can do.
1969 */
1970 ehea_allmulti(dev, 1);
1971 }
1972
1973 if (dev->mc_count > port->adapter->max_mc_mac) {
1974 ehea_info("Mcast registration limit reached (0x%llx). "
1975 "Use ALLMULTI!",
1976 port->adapter->max_mc_mac);
1977 goto out;
1978 }
1979
1980 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
1981 k_mcl_entry = k_mcl_entry->next)
1982 ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1983
1984 }
1985 out:
1986 ehea_update_bcmc_registrations();
1987 spin_unlock(&ehea_bcmc_regs.lock);
1988 return;
1989 }
1990
ehea_change_mtu(struct net_device * dev,int new_mtu)1991 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1992 {
1993 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1994 return -EINVAL;
1995 dev->mtu = new_mtu;
1996 return 0;
1997 }
1998
ehea_xmit2(struct sk_buff * skb,struct net_device * dev,struct ehea_swqe * swqe,u32 lkey)1999 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2000 struct ehea_swqe *swqe, u32 lkey)
2001 {
2002 if (skb->protocol == htons(ETH_P_IP)) {
2003 const struct iphdr *iph = ip_hdr(skb);
2004
2005 /* IPv4 */
2006 swqe->tx_control |= EHEA_SWQE_CRC
2007 | EHEA_SWQE_IP_CHECKSUM
2008 | EHEA_SWQE_TCP_CHECKSUM
2009 | EHEA_SWQE_IMM_DATA_PRESENT
2010 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2011
2012 write_ip_start_end(swqe, skb);
2013
2014 if (iph->protocol == IPPROTO_UDP) {
2015 if ((iph->frag_off & IP_MF)
2016 || (iph->frag_off & IP_OFFSET))
2017 /* IP fragment, so don't change cs */
2018 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2019 else
2020 write_udp_offset_end(swqe, skb);
2021 } else if (iph->protocol == IPPROTO_TCP) {
2022 write_tcp_offset_end(swqe, skb);
2023 }
2024
2025 /* icmp (big data) and ip segmentation packets (all other ip
2026 packets) do not require any special handling */
2027
2028 } else {
2029 /* Other Ethernet Protocol */
2030 swqe->tx_control |= EHEA_SWQE_CRC
2031 | EHEA_SWQE_IMM_DATA_PRESENT
2032 | EHEA_SWQE_DESCRIPTORS_PRESENT;
2033 }
2034
2035 write_swqe2_data(skb, dev, swqe, lkey);
2036 }
2037
ehea_xmit3(struct sk_buff * skb,struct net_device * dev,struct ehea_swqe * swqe)2038 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2039 struct ehea_swqe *swqe)
2040 {
2041 int nfrags = skb_shinfo(skb)->nr_frags;
2042 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2043 skb_frag_t *frag;
2044 int i;
2045
2046 if (skb->protocol == htons(ETH_P_IP)) {
2047 const struct iphdr *iph = ip_hdr(skb);
2048
2049 /* IPv4 */
2050 write_ip_start_end(swqe, skb);
2051
2052 if (iph->protocol == IPPROTO_TCP) {
2053 swqe->tx_control |= EHEA_SWQE_CRC
2054 | EHEA_SWQE_IP_CHECKSUM
2055 | EHEA_SWQE_TCP_CHECKSUM
2056 | EHEA_SWQE_IMM_DATA_PRESENT;
2057
2058 write_tcp_offset_end(swqe, skb);
2059
2060 } else if (iph->protocol == IPPROTO_UDP) {
2061 if ((iph->frag_off & IP_MF)
2062 || (iph->frag_off & IP_OFFSET))
2063 /* IP fragment, so don't change cs */
2064 swqe->tx_control |= EHEA_SWQE_CRC
2065 | EHEA_SWQE_IMM_DATA_PRESENT;
2066 else {
2067 swqe->tx_control |= EHEA_SWQE_CRC
2068 | EHEA_SWQE_IP_CHECKSUM
2069 | EHEA_SWQE_TCP_CHECKSUM
2070 | EHEA_SWQE_IMM_DATA_PRESENT;
2071
2072 write_udp_offset_end(swqe, skb);
2073 }
2074 } else {
2075 /* icmp (big data) and
2076 ip segmentation packets (all other ip packets) */
2077 swqe->tx_control |= EHEA_SWQE_CRC
2078 | EHEA_SWQE_IP_CHECKSUM
2079 | EHEA_SWQE_IMM_DATA_PRESENT;
2080 }
2081 } else {
2082 /* Other Ethernet Protocol */
2083 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2084 }
2085 /* copy (immediate) data */
2086 if (nfrags == 0) {
2087 /* data is in a single piece */
2088 skb_copy_from_linear_data(skb, imm_data, skb->len);
2089 } else {
2090 /* first copy data from the skb->data buffer ... */
2091 skb_copy_from_linear_data(skb, imm_data,
2092 skb->len - skb->data_len);
2093 imm_data += skb->len - skb->data_len;
2094
2095 /* ... then copy data from the fragments */
2096 for (i = 0; i < nfrags; i++) {
2097 frag = &skb_shinfo(skb)->frags[i];
2098 memcpy(imm_data,
2099 page_address(frag->page) + frag->page_offset,
2100 frag->size);
2101 imm_data += frag->size;
2102 }
2103 }
2104 swqe->immediate_data_length = skb->len;
2105 dev_kfree_skb(skb);
2106 }
2107
ehea_hash_skb(struct sk_buff * skb,int num_qps)2108 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2109 {
2110 struct tcphdr *tcp;
2111 u32 tmp;
2112
2113 if ((skb->protocol == htons(ETH_P_IP)) &&
2114 (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2115 tcp = (struct tcphdr *)(skb_network_header(skb) +
2116 (ip_hdr(skb)->ihl * 4));
2117 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2118 tmp += ip_hdr(skb)->daddr % 31;
2119 return tmp % num_qps;
2120 } else
2121 return 0;
2122 }
2123
ehea_start_xmit(struct sk_buff * skb,struct net_device * dev)2124 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2125 {
2126 struct ehea_port *port = netdev_priv(dev);
2127 struct ehea_swqe *swqe;
2128 unsigned long flags;
2129 u32 lkey;
2130 int swqe_index;
2131 struct ehea_port_res *pr;
2132
2133 pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2134
2135 if (!spin_trylock(&pr->xmit_lock))
2136 return NETDEV_TX_BUSY;
2137
2138 if (pr->queue_stopped) {
2139 spin_unlock(&pr->xmit_lock);
2140 return NETDEV_TX_BUSY;
2141 }
2142
2143 swqe = ehea_get_swqe(pr->qp, &swqe_index);
2144 memset(swqe, 0, SWQE_HEADER_SIZE);
2145 atomic_dec(&pr->swqe_avail);
2146
2147 if (skb->len <= SWQE3_MAX_IMM) {
2148 u32 sig_iv = port->sig_comp_iv;
2149 u32 swqe_num = pr->swqe_id_counter;
2150 ehea_xmit3(skb, dev, swqe);
2151 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2152 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2153 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2154 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2155 sig_iv);
2156 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2157 pr->swqe_ll_count = 0;
2158 } else
2159 pr->swqe_ll_count += 1;
2160 } else {
2161 swqe->wr_id =
2162 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2163 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2164 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2165 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2166 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2167
2168 pr->sq_skba.index++;
2169 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2170
2171 lkey = pr->send_mr.lkey;
2172 ehea_xmit2(skb, dev, swqe, lkey);
2173 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2174 }
2175 pr->swqe_id_counter += 1;
2176
2177 if (port->vgrp && vlan_tx_tag_present(skb)) {
2178 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2179 swqe->vlan_tag = vlan_tx_tag_get(skb);
2180 }
2181
2182 if (netif_msg_tx_queued(port)) {
2183 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2184 ehea_dump(swqe, 512, "swqe");
2185 }
2186
2187 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2188 netif_stop_queue(dev);
2189 swqe->tx_control |= EHEA_SWQE_PURGE;
2190 }
2191
2192 ehea_post_swqe(pr->qp, swqe);
2193 pr->tx_packets++;
2194
2195 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2196 spin_lock_irqsave(&pr->netif_queue, flags);
2197 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2198 pr->p_stats.queue_stopped++;
2199 netif_stop_queue(dev);
2200 pr->queue_stopped = 1;
2201 }
2202 spin_unlock_irqrestore(&pr->netif_queue, flags);
2203 }
2204 dev->trans_start = jiffies;
2205 spin_unlock(&pr->xmit_lock);
2206
2207 return NETDEV_TX_OK;
2208 }
2209
ehea_vlan_rx_register(struct net_device * dev,struct vlan_group * grp)2210 static void ehea_vlan_rx_register(struct net_device *dev,
2211 struct vlan_group *grp)
2212 {
2213 struct ehea_port *port = netdev_priv(dev);
2214 struct ehea_adapter *adapter = port->adapter;
2215 struct hcp_ehea_port_cb1 *cb1;
2216 u64 hret;
2217
2218 port->vgrp = grp;
2219
2220 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2221 if (!cb1) {
2222 ehea_error("no mem for cb1");
2223 goto out;
2224 }
2225
2226 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2227 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2228 if (hret != H_SUCCESS)
2229 ehea_error("modify_ehea_port failed");
2230
2231 kfree(cb1);
2232 out:
2233 return;
2234 }
2235
ehea_vlan_rx_add_vid(struct net_device * dev,unsigned short vid)2236 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2237 {
2238 struct ehea_port *port = netdev_priv(dev);
2239 struct ehea_adapter *adapter = port->adapter;
2240 struct hcp_ehea_port_cb1 *cb1;
2241 int index;
2242 u64 hret;
2243
2244 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2245 if (!cb1) {
2246 ehea_error("no mem for cb1");
2247 goto out;
2248 }
2249
2250 hret = ehea_h_query_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("query_ehea_port failed");
2254 goto out;
2255 }
2256
2257 index = (vid / 64);
2258 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2259
2260 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2261 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2262 if (hret != H_SUCCESS)
2263 ehea_error("modify_ehea_port failed");
2264 out:
2265 kfree(cb1);
2266 return;
2267 }
2268
ehea_vlan_rx_kill_vid(struct net_device * dev,unsigned short vid)2269 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2270 {
2271 struct ehea_port *port = netdev_priv(dev);
2272 struct ehea_adapter *adapter = port->adapter;
2273 struct hcp_ehea_port_cb1 *cb1;
2274 int index;
2275 u64 hret;
2276
2277 vlan_group_set_device(port->vgrp, vid, NULL);
2278
2279 cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2280 if (!cb1) {
2281 ehea_error("no mem for cb1");
2282 goto out;
2283 }
2284
2285 hret = ehea_h_query_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("query_ehea_port failed");
2289 goto out;
2290 }
2291
2292 index = (vid / 64);
2293 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2294
2295 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2296 H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2297 if (hret != H_SUCCESS)
2298 ehea_error("modify_ehea_port failed");
2299 out:
2300 kfree(cb1);
2301 return;
2302 }
2303
ehea_activate_qp(struct ehea_adapter * adapter,struct ehea_qp * qp)2304 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2305 {
2306 int ret = -EIO;
2307 u64 hret;
2308 u16 dummy16 = 0;
2309 u64 dummy64 = 0;
2310 struct hcp_modify_qp_cb0 *cb0;
2311
2312 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2313 if (!cb0) {
2314 ret = -ENOMEM;
2315 goto out;
2316 }
2317
2318 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2319 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2320 if (hret != H_SUCCESS) {
2321 ehea_error("query_ehea_qp failed (1)");
2322 goto out;
2323 }
2324
2325 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2326 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2327 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2328 &dummy64, &dummy64, &dummy16, &dummy16);
2329 if (hret != H_SUCCESS) {
2330 ehea_error("modify_ehea_qp failed (1)");
2331 goto out;
2332 }
2333
2334 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2335 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2336 if (hret != H_SUCCESS) {
2337 ehea_error("query_ehea_qp failed (2)");
2338 goto out;
2339 }
2340
2341 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2342 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2343 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2344 &dummy64, &dummy64, &dummy16, &dummy16);
2345 if (hret != H_SUCCESS) {
2346 ehea_error("modify_ehea_qp failed (2)");
2347 goto out;
2348 }
2349
2350 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2351 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2352 if (hret != H_SUCCESS) {
2353 ehea_error("query_ehea_qp failed (3)");
2354 goto out;
2355 }
2356
2357 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2358 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2359 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2360 &dummy64, &dummy64, &dummy16, &dummy16);
2361 if (hret != H_SUCCESS) {
2362 ehea_error("modify_ehea_qp failed (3)");
2363 goto out;
2364 }
2365
2366 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2367 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2368 if (hret != H_SUCCESS) {
2369 ehea_error("query_ehea_qp failed (4)");
2370 goto out;
2371 }
2372
2373 ret = 0;
2374 out:
2375 kfree(cb0);
2376 return ret;
2377 }
2378
ehea_port_res_setup(struct ehea_port * port,int def_qps,int add_tx_qps)2379 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2380 int add_tx_qps)
2381 {
2382 int ret, i;
2383 struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2384 enum ehea_eq_type eq_type = EHEA_EQ;
2385
2386 port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2387 EHEA_MAX_ENTRIES_EQ, 1);
2388 if (!port->qp_eq) {
2389 ret = -EINVAL;
2390 ehea_error("ehea_create_eq failed (qp_eq)");
2391 goto out_kill_eq;
2392 }
2393
2394 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2395 pr_cfg.max_entries_scq = sq_entries * 2;
2396 pr_cfg.max_entries_sq = sq_entries;
2397 pr_cfg.max_entries_rq1 = rq1_entries;
2398 pr_cfg.max_entries_rq2 = rq2_entries;
2399 pr_cfg.max_entries_rq3 = rq3_entries;
2400
2401 pr_cfg_small_rx.max_entries_rcq = 1;
2402 pr_cfg_small_rx.max_entries_scq = sq_entries;
2403 pr_cfg_small_rx.max_entries_sq = sq_entries;
2404 pr_cfg_small_rx.max_entries_rq1 = 1;
2405 pr_cfg_small_rx.max_entries_rq2 = 1;
2406 pr_cfg_small_rx.max_entries_rq3 = 1;
2407
2408 for (i = 0; i < def_qps; i++) {
2409 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2410 if (ret)
2411 goto out_clean_pr;
2412 }
2413 for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2414 ret = ehea_init_port_res(port, &port->port_res[i],
2415 &pr_cfg_small_rx, i);
2416 if (ret)
2417 goto out_clean_pr;
2418 }
2419
2420 return 0;
2421
2422 out_clean_pr:
2423 while (--i >= 0)
2424 ehea_clean_portres(port, &port->port_res[i]);
2425
2426 out_kill_eq:
2427 ehea_destroy_eq(port->qp_eq);
2428 return ret;
2429 }
2430
ehea_clean_all_portres(struct ehea_port * port)2431 static int ehea_clean_all_portres(struct ehea_port *port)
2432 {
2433 int ret = 0;
2434 int i;
2435
2436 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2437 ret |= ehea_clean_portres(port, &port->port_res[i]);
2438
2439 ret |= ehea_destroy_eq(port->qp_eq);
2440
2441 return ret;
2442 }
2443
ehea_remove_adapter_mr(struct ehea_adapter * adapter)2444 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2445 {
2446 if (adapter->active_ports)
2447 return;
2448
2449 ehea_rem_mr(&adapter->mr);
2450 }
2451
ehea_add_adapter_mr(struct ehea_adapter * adapter)2452 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2453 {
2454 if (adapter->active_ports)
2455 return 0;
2456
2457 return ehea_reg_kernel_mr(adapter, &adapter->mr);
2458 }
2459
ehea_up(struct net_device * dev)2460 static int ehea_up(struct net_device *dev)
2461 {
2462 int ret, i;
2463 struct ehea_port *port = netdev_priv(dev);
2464
2465 if (port->state == EHEA_PORT_UP)
2466 return 0;
2467
2468 mutex_lock(&ehea_fw_handles.lock);
2469
2470 ret = ehea_port_res_setup(port, port->num_def_qps,
2471 port->num_add_tx_qps);
2472 if (ret) {
2473 ehea_error("port_res_failed");
2474 goto out;
2475 }
2476
2477 /* Set default QP for this port */
2478 ret = ehea_configure_port(port);
2479 if (ret) {
2480 ehea_error("ehea_configure_port failed. ret:%d", ret);
2481 goto out_clean_pr;
2482 }
2483
2484 ret = ehea_reg_interrupts(dev);
2485 if (ret) {
2486 ehea_error("reg_interrupts failed. ret:%d", ret);
2487 goto out_clean_pr;
2488 }
2489
2490 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2491 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2492 if (ret) {
2493 ehea_error("activate_qp failed");
2494 goto out_free_irqs;
2495 }
2496 }
2497
2498 for (i = 0; i < port->num_def_qps; i++) {
2499 ret = ehea_fill_port_res(&port->port_res[i]);
2500 if (ret) {
2501 ehea_error("out_free_irqs");
2502 goto out_free_irqs;
2503 }
2504 }
2505
2506 spin_lock(&ehea_bcmc_regs.lock);
2507
2508 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2509 if (ret) {
2510 ret = -EIO;
2511 goto out_free_irqs;
2512 }
2513
2514 port->state = EHEA_PORT_UP;
2515
2516 ret = 0;
2517 goto out;
2518
2519 out_free_irqs:
2520 ehea_free_interrupts(dev);
2521
2522 out_clean_pr:
2523 ehea_clean_all_portres(port);
2524 out:
2525 if (ret)
2526 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2527
2528 ehea_update_bcmc_registrations();
2529 spin_unlock(&ehea_bcmc_regs.lock);
2530
2531 ehea_update_firmware_handles();
2532 mutex_unlock(&ehea_fw_handles.lock);
2533
2534 return ret;
2535 }
2536
port_napi_disable(struct ehea_port * port)2537 static void port_napi_disable(struct ehea_port *port)
2538 {
2539 int i;
2540
2541 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2542 napi_disable(&port->port_res[i].napi);
2543 }
2544
port_napi_enable(struct ehea_port * port)2545 static void port_napi_enable(struct ehea_port *port)
2546 {
2547 int i;
2548
2549 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2550 napi_enable(&port->port_res[i].napi);
2551 }
2552
ehea_open(struct net_device * dev)2553 static int ehea_open(struct net_device *dev)
2554 {
2555 int ret;
2556 struct ehea_port *port = netdev_priv(dev);
2557
2558 mutex_lock(&port->port_lock);
2559
2560 if (netif_msg_ifup(port))
2561 ehea_info("enabling port %s", dev->name);
2562
2563 ret = ehea_up(dev);
2564 if (!ret) {
2565 port_napi_enable(port);
2566 netif_start_queue(dev);
2567 }
2568
2569 mutex_unlock(&port->port_lock);
2570
2571 return ret;
2572 }
2573
ehea_down(struct net_device * dev)2574 static int ehea_down(struct net_device *dev)
2575 {
2576 int ret;
2577 struct ehea_port *port = netdev_priv(dev);
2578
2579 if (port->state == EHEA_PORT_DOWN)
2580 return 0;
2581
2582 mutex_lock(&ehea_fw_handles.lock);
2583
2584 spin_lock(&ehea_bcmc_regs.lock);
2585 ehea_drop_multicast_list(dev);
2586 ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2587
2588 ehea_free_interrupts(dev);
2589
2590 port->state = EHEA_PORT_DOWN;
2591
2592 ehea_update_bcmc_registrations();
2593 spin_unlock(&ehea_bcmc_regs.lock);
2594
2595 ret = ehea_clean_all_portres(port);
2596 if (ret)
2597 ehea_info("Failed freeing resources for %s. ret=%i",
2598 dev->name, ret);
2599
2600 ehea_update_firmware_handles();
2601 mutex_unlock(&ehea_fw_handles.lock);
2602
2603 return ret;
2604 }
2605
ehea_stop(struct net_device * dev)2606 static int ehea_stop(struct net_device *dev)
2607 {
2608 int ret;
2609 struct ehea_port *port = netdev_priv(dev);
2610
2611 if (netif_msg_ifdown(port))
2612 ehea_info("disabling port %s", dev->name);
2613
2614 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2615 cancel_work_sync(&port->reset_task);
2616 mutex_lock(&port->port_lock);
2617 netif_stop_queue(dev);
2618 port_napi_disable(port);
2619 ret = ehea_down(dev);
2620 mutex_unlock(&port->port_lock);
2621 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2622 return ret;
2623 }
2624
ehea_purge_sq(struct ehea_qp * orig_qp)2625 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2626 {
2627 struct ehea_qp qp = *orig_qp;
2628 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2629 struct ehea_swqe *swqe;
2630 int wqe_index;
2631 int i;
2632
2633 for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2634 swqe = ehea_get_swqe(&qp, &wqe_index);
2635 swqe->tx_control |= EHEA_SWQE_PURGE;
2636 }
2637 }
2638
ehea_flush_sq(struct ehea_port * port)2639 static void ehea_flush_sq(struct ehea_port *port)
2640 {
2641 int i;
2642
2643 for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2644 struct ehea_port_res *pr = &port->port_res[i];
2645 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2646 int k = 0;
2647 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2648 msleep(5);
2649 if (++k == 20)
2650 break;
2651 }
2652 }
2653 }
2654
ehea_stop_qps(struct net_device * dev)2655 int ehea_stop_qps(struct net_device *dev)
2656 {
2657 struct ehea_port *port = netdev_priv(dev);
2658 struct ehea_adapter *adapter = port->adapter;
2659 struct hcp_modify_qp_cb0 *cb0;
2660 int ret = -EIO;
2661 int dret;
2662 int i;
2663 u64 hret;
2664 u64 dummy64 = 0;
2665 u16 dummy16 = 0;
2666
2667 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2668 if (!cb0) {
2669 ret = -ENOMEM;
2670 goto out;
2671 }
2672
2673 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2674 struct ehea_port_res *pr = &port->port_res[i];
2675 struct ehea_qp *qp = pr->qp;
2676
2677 /* Purge send queue */
2678 ehea_purge_sq(qp);
2679
2680 /* Disable queue pair */
2681 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2682 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2683 cb0);
2684 if (hret != H_SUCCESS) {
2685 ehea_error("query_ehea_qp failed (1)");
2686 goto out;
2687 }
2688
2689 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2690 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2691
2692 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2693 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2694 1), cb0, &dummy64,
2695 &dummy64, &dummy16, &dummy16);
2696 if (hret != H_SUCCESS) {
2697 ehea_error("modify_ehea_qp failed (1)");
2698 goto out;
2699 }
2700
2701 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2702 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2703 cb0);
2704 if (hret != H_SUCCESS) {
2705 ehea_error("query_ehea_qp failed (2)");
2706 goto out;
2707 }
2708
2709 /* deregister shared memory regions */
2710 dret = ehea_rem_smrs(pr);
2711 if (dret) {
2712 ehea_error("unreg shared memory region failed");
2713 goto out;
2714 }
2715 }
2716
2717 ret = 0;
2718 out:
2719 kfree(cb0);
2720
2721 return ret;
2722 }
2723
ehea_update_rqs(struct ehea_qp * orig_qp,struct ehea_port_res * pr)2724 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2725 {
2726 struct ehea_qp qp = *orig_qp;
2727 struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2728 struct ehea_rwqe *rwqe;
2729 struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2730 struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2731 struct sk_buff *skb;
2732 u32 lkey = pr->recv_mr.lkey;
2733
2734
2735 int i;
2736 int index;
2737
2738 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2739 rwqe = ehea_get_next_rwqe(&qp, 2);
2740 rwqe->sg_list[0].l_key = lkey;
2741 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2742 skb = skba_rq2[index];
2743 if (skb)
2744 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2745 }
2746
2747 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2748 rwqe = ehea_get_next_rwqe(&qp, 3);
2749 rwqe->sg_list[0].l_key = lkey;
2750 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2751 skb = skba_rq3[index];
2752 if (skb)
2753 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2754 }
2755 }
2756
ehea_restart_qps(struct net_device * dev)2757 int ehea_restart_qps(struct net_device *dev)
2758 {
2759 struct ehea_port *port = netdev_priv(dev);
2760 struct ehea_adapter *adapter = port->adapter;
2761 int ret = 0;
2762 int i;
2763
2764 struct hcp_modify_qp_cb0 *cb0;
2765 u64 hret;
2766 u64 dummy64 = 0;
2767 u16 dummy16 = 0;
2768
2769 cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2770 if (!cb0) {
2771 ret = -ENOMEM;
2772 goto out;
2773 }
2774
2775 for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2776 struct ehea_port_res *pr = &port->port_res[i];
2777 struct ehea_qp *qp = pr->qp;
2778
2779 ret = ehea_gen_smrs(pr);
2780 if (ret) {
2781 ehea_error("creation of shared memory regions failed");
2782 goto out;
2783 }
2784
2785 ehea_update_rqs(qp, pr);
2786
2787 /* Enable queue pair */
2788 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2789 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2790 cb0);
2791 if (hret != H_SUCCESS) {
2792 ehea_error("query_ehea_qp failed (1)");
2793 goto out;
2794 }
2795
2796 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2797 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2798
2799 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2800 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2801 1), cb0, &dummy64,
2802 &dummy64, &dummy16, &dummy16);
2803 if (hret != H_SUCCESS) {
2804 ehea_error("modify_ehea_qp failed (1)");
2805 goto out;
2806 }
2807
2808 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2809 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2810 cb0);
2811 if (hret != H_SUCCESS) {
2812 ehea_error("query_ehea_qp failed (2)");
2813 goto out;
2814 }
2815
2816 /* refill entire queue */
2817 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2818 ehea_refill_rq2(pr, 0);
2819 ehea_refill_rq3(pr, 0);
2820 }
2821 out:
2822 kfree(cb0);
2823
2824 return ret;
2825 }
2826
ehea_reset_port(struct work_struct * work)2827 static void ehea_reset_port(struct work_struct *work)
2828 {
2829 int ret;
2830 struct ehea_port *port =
2831 container_of(work, struct ehea_port, reset_task);
2832 struct net_device *dev = port->netdev;
2833
2834 port->resets++;
2835 mutex_lock(&port->port_lock);
2836 netif_stop_queue(dev);
2837
2838 port_napi_disable(port);
2839
2840 ehea_down(dev);
2841
2842 ret = ehea_up(dev);
2843 if (ret)
2844 goto out;
2845
2846 ehea_set_multicast_list(dev);
2847
2848 if (netif_msg_timer(port))
2849 ehea_info("Device %s resetted successfully", dev->name);
2850
2851 port_napi_enable(port);
2852
2853 netif_wake_queue(dev);
2854 out:
2855 mutex_unlock(&port->port_lock);
2856 return;
2857 }
2858
ehea_rereg_mrs(struct work_struct * work)2859 static void ehea_rereg_mrs(struct work_struct *work)
2860 {
2861 int ret, i;
2862 struct ehea_adapter *adapter;
2863
2864 mutex_lock(&dlpar_mem_lock);
2865 ehea_info("LPAR memory changed - re-initializing driver");
2866
2867 list_for_each_entry(adapter, &adapter_list, list)
2868 if (adapter->active_ports) {
2869 /* Shutdown all ports */
2870 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2871 struct ehea_port *port = adapter->port[i];
2872 struct net_device *dev;
2873
2874 if (!port)
2875 continue;
2876
2877 dev = port->netdev;
2878
2879 if (dev->flags & IFF_UP) {
2880 mutex_lock(&port->port_lock);
2881 netif_stop_queue(dev);
2882 ehea_flush_sq(port);
2883 ret = ehea_stop_qps(dev);
2884 if (ret) {
2885 mutex_unlock(&port->port_lock);
2886 goto out;
2887 }
2888 port_napi_disable(port);
2889 mutex_unlock(&port->port_lock);
2890 }
2891 }
2892
2893 /* Unregister old memory region */
2894 ret = ehea_rem_mr(&adapter->mr);
2895 if (ret) {
2896 ehea_error("unregister MR failed - driver"
2897 " inoperable!");
2898 goto out;
2899 }
2900 }
2901
2902 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2903
2904 list_for_each_entry(adapter, &adapter_list, list)
2905 if (adapter->active_ports) {
2906 /* Register new memory region */
2907 ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2908 if (ret) {
2909 ehea_error("register MR failed - driver"
2910 " inoperable!");
2911 goto out;
2912 }
2913
2914 /* Restart all ports */
2915 for (i = 0; i < EHEA_MAX_PORTS; i++) {
2916 struct ehea_port *port = adapter->port[i];
2917
2918 if (port) {
2919 struct net_device *dev = port->netdev;
2920
2921 if (dev->flags & IFF_UP) {
2922 mutex_lock(&port->port_lock);
2923 port_napi_enable(port);
2924 ret = ehea_restart_qps(dev);
2925 if (!ret)
2926 netif_wake_queue(dev);
2927 mutex_unlock(&port->port_lock);
2928 }
2929 }
2930 }
2931 }
2932 ehea_info("re-initializing driver complete");
2933 out:
2934 mutex_unlock(&dlpar_mem_lock);
2935 return;
2936 }
2937
ehea_tx_watchdog(struct net_device * dev)2938 static void ehea_tx_watchdog(struct net_device *dev)
2939 {
2940 struct ehea_port *port = netdev_priv(dev);
2941
2942 if (netif_carrier_ok(dev) &&
2943 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2944 ehea_schedule_port_reset(port);
2945 }
2946
ehea_sense_adapter_attr(struct ehea_adapter * adapter)2947 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2948 {
2949 struct hcp_query_ehea *cb;
2950 u64 hret;
2951 int ret;
2952
2953 cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2954 if (!cb) {
2955 ret = -ENOMEM;
2956 goto out;
2957 }
2958
2959 hret = ehea_h_query_ehea(adapter->handle, cb);
2960
2961 if (hret != H_SUCCESS) {
2962 ret = -EIO;
2963 goto out_herr;
2964 }
2965
2966 adapter->max_mc_mac = cb->max_mc_mac - 1;
2967 ret = 0;
2968
2969 out_herr:
2970 kfree(cb);
2971 out:
2972 return ret;
2973 }
2974
ehea_get_jumboframe_status(struct ehea_port * port,int * jumbo)2975 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2976 {
2977 struct hcp_ehea_port_cb4 *cb4;
2978 u64 hret;
2979 int ret = 0;
2980
2981 *jumbo = 0;
2982
2983 /* (Try to) enable *jumbo frames */
2984 cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2985 if (!cb4) {
2986 ehea_error("no mem for cb4");
2987 ret = -ENOMEM;
2988 goto out;
2989 } else {
2990 hret = ehea_h_query_ehea_port(port->adapter->handle,
2991 port->logical_port_id,
2992 H_PORT_CB4,
2993 H_PORT_CB4_JUMBO, cb4);
2994 if (hret == H_SUCCESS) {
2995 if (cb4->jumbo_frame)
2996 *jumbo = 1;
2997 else {
2998 cb4->jumbo_frame = 1;
2999 hret = ehea_h_modify_ehea_port(port->adapter->
3000 handle,
3001 port->
3002 logical_port_id,
3003 H_PORT_CB4,
3004 H_PORT_CB4_JUMBO,
3005 cb4);
3006 if (hret == H_SUCCESS)
3007 *jumbo = 1;
3008 }
3009 } else
3010 ret = -EINVAL;
3011
3012 kfree(cb4);
3013 }
3014 out:
3015 return ret;
3016 }
3017
ehea_show_port_id(struct device * dev,struct device_attribute * attr,char * buf)3018 static ssize_t ehea_show_port_id(struct device *dev,
3019 struct device_attribute *attr, char *buf)
3020 {
3021 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3022 return sprintf(buf, "%d", port->logical_port_id);
3023 }
3024
3025 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3026 NULL);
3027
logical_port_release(struct device * dev)3028 static void __devinit logical_port_release(struct device *dev)
3029 {
3030 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3031 of_node_put(port->ofdev.node);
3032 }
3033
ehea_register_port(struct ehea_port * port,struct device_node * dn)3034 static struct device *ehea_register_port(struct ehea_port *port,
3035 struct device_node *dn)
3036 {
3037 int ret;
3038
3039 port->ofdev.node = of_node_get(dn);
3040 port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3041 port->ofdev.dev.bus = &ibmebus_bus_type;
3042
3043 sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
3044 port->ofdev.dev.release = logical_port_release;
3045
3046 ret = of_device_register(&port->ofdev);
3047 if (ret) {
3048 ehea_error("failed to register device. ret=%d", ret);
3049 goto out;
3050 }
3051
3052 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3053 if (ret) {
3054 ehea_error("failed to register attributes, ret=%d", ret);
3055 goto out_unreg_of_dev;
3056 }
3057
3058 return &port->ofdev.dev;
3059
3060 out_unreg_of_dev:
3061 of_device_unregister(&port->ofdev);
3062 out:
3063 return NULL;
3064 }
3065
ehea_unregister_port(struct ehea_port * port)3066 static void ehea_unregister_port(struct ehea_port *port)
3067 {
3068 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3069 of_device_unregister(&port->ofdev);
3070 }
3071
ehea_setup_single_port(struct ehea_adapter * adapter,u32 logical_port_id,struct device_node * dn)3072 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3073 u32 logical_port_id,
3074 struct device_node *dn)
3075 {
3076 int ret;
3077 struct net_device *dev;
3078 struct ehea_port *port;
3079 struct device *port_dev;
3080 int jumbo;
3081
3082 /* allocate memory for the port structures */
3083 dev = alloc_etherdev(sizeof(struct ehea_port));
3084
3085 if (!dev) {
3086 ehea_error("no mem for net_device");
3087 ret = -ENOMEM;
3088 goto out_err;
3089 }
3090
3091 port = netdev_priv(dev);
3092
3093 mutex_init(&port->port_lock);
3094 port->state = EHEA_PORT_DOWN;
3095 port->sig_comp_iv = sq_entries / 10;
3096
3097 port->adapter = adapter;
3098 port->netdev = dev;
3099 port->logical_port_id = logical_port_id;
3100
3101 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3102
3103 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3104 if (!port->mc_list) {
3105 ret = -ENOMEM;
3106 goto out_free_ethdev;
3107 }
3108
3109 INIT_LIST_HEAD(&port->mc_list->list);
3110
3111 ret = ehea_sense_port_attr(port);
3112 if (ret)
3113 goto out_free_mc_list;
3114
3115 port_dev = ehea_register_port(port, dn);
3116 if (!port_dev)
3117 goto out_free_mc_list;
3118
3119 SET_NETDEV_DEV(dev, port_dev);
3120
3121 /* initialize net_device structure */
3122 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3123
3124 dev->open = ehea_open;
3125 #ifdef CONFIG_NET_POLL_CONTROLLER
3126 dev->poll_controller = ehea_netpoll;
3127 #endif
3128 dev->stop = ehea_stop;
3129 dev->hard_start_xmit = ehea_start_xmit;
3130 dev->get_stats = ehea_get_stats;
3131 dev->set_multicast_list = ehea_set_multicast_list;
3132 dev->set_mac_address = ehea_set_mac_addr;
3133 dev->change_mtu = ehea_change_mtu;
3134 dev->vlan_rx_register = ehea_vlan_rx_register;
3135 dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
3136 dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
3137 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3138 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3139 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3140 | NETIF_F_LLTX;
3141 dev->tx_timeout = &ehea_tx_watchdog;
3142 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3143
3144 INIT_WORK(&port->reset_task, ehea_reset_port);
3145 ehea_set_ethtool_ops(dev);
3146
3147 ret = register_netdev(dev);
3148 if (ret) {
3149 ehea_error("register_netdev failed. ret=%d", ret);
3150 goto out_unreg_port;
3151 }
3152
3153 port->lro_max_aggr = lro_max_aggr;
3154
3155 ret = ehea_get_jumboframe_status(port, &jumbo);
3156 if (ret)
3157 ehea_error("failed determining jumbo frame status for %s",
3158 port->netdev->name);
3159
3160 ehea_info("%s: Jumbo frames are %sabled", dev->name,
3161 jumbo == 1 ? "en" : "dis");
3162
3163 adapter->active_ports++;
3164
3165 return port;
3166
3167 out_unreg_port:
3168 ehea_unregister_port(port);
3169
3170 out_free_mc_list:
3171 kfree(port->mc_list);
3172
3173 out_free_ethdev:
3174 free_netdev(dev);
3175
3176 out_err:
3177 ehea_error("setting up logical port with id=%d failed, ret=%d",
3178 logical_port_id, ret);
3179 return NULL;
3180 }
3181
ehea_shutdown_single_port(struct ehea_port * port)3182 static void ehea_shutdown_single_port(struct ehea_port *port)
3183 {
3184 struct ehea_adapter *adapter = port->adapter;
3185 unregister_netdev(port->netdev);
3186 ehea_unregister_port(port);
3187 kfree(port->mc_list);
3188 free_netdev(port->netdev);
3189 adapter->active_ports--;
3190 }
3191
ehea_setup_ports(struct ehea_adapter * adapter)3192 static int ehea_setup_ports(struct ehea_adapter *adapter)
3193 {
3194 struct device_node *lhea_dn;
3195 struct device_node *eth_dn = NULL;
3196
3197 const u32 *dn_log_port_id;
3198 int i = 0;
3199
3200 lhea_dn = adapter->ofdev->node;
3201 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3202
3203 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3204 NULL);
3205 if (!dn_log_port_id) {
3206 ehea_error("bad device node: eth_dn name=%s",
3207 eth_dn->full_name);
3208 continue;
3209 }
3210
3211 if (ehea_add_adapter_mr(adapter)) {
3212 ehea_error("creating MR failed");
3213 of_node_put(eth_dn);
3214 return -EIO;
3215 }
3216
3217 adapter->port[i] = ehea_setup_single_port(adapter,
3218 *dn_log_port_id,
3219 eth_dn);
3220 if (adapter->port[i])
3221 ehea_info("%s -> logical port id #%d",
3222 adapter->port[i]->netdev->name,
3223 *dn_log_port_id);
3224 else
3225 ehea_remove_adapter_mr(adapter);
3226
3227 i++;
3228 };
3229 return 0;
3230 }
3231
ehea_get_eth_dn(struct ehea_adapter * adapter,u32 logical_port_id)3232 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3233 u32 logical_port_id)
3234 {
3235 struct device_node *lhea_dn;
3236 struct device_node *eth_dn = NULL;
3237 const u32 *dn_log_port_id;
3238
3239 lhea_dn = adapter->ofdev->node;
3240 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3241
3242 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3243 NULL);
3244 if (dn_log_port_id)
3245 if (*dn_log_port_id == logical_port_id)
3246 return eth_dn;
3247 };
3248
3249 return NULL;
3250 }
3251
ehea_probe_port(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)3252 static ssize_t ehea_probe_port(struct device *dev,
3253 struct device_attribute *attr,
3254 const char *buf, size_t count)
3255 {
3256 struct ehea_adapter *adapter = dev->driver_data;
3257 struct ehea_port *port;
3258 struct device_node *eth_dn = NULL;
3259 int i;
3260
3261 u32 logical_port_id;
3262
3263 sscanf(buf, "%d", &logical_port_id);
3264
3265 port = ehea_get_port(adapter, logical_port_id);
3266
3267 if (port) {
3268 ehea_info("adding port with logical port id=%d failed. port "
3269 "already configured as %s.", logical_port_id,
3270 port->netdev->name);
3271 return -EINVAL;
3272 }
3273
3274 eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3275
3276 if (!eth_dn) {
3277 ehea_info("no logical port with id %d found", logical_port_id);
3278 return -EINVAL;
3279 }
3280
3281 if (ehea_add_adapter_mr(adapter)) {
3282 ehea_error("creating MR failed");
3283 return -EIO;
3284 }
3285
3286 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3287
3288 of_node_put(eth_dn);
3289
3290 if (port) {
3291 for (i = 0; i < EHEA_MAX_PORTS; i++)
3292 if (!adapter->port[i]) {
3293 adapter->port[i] = port;
3294 break;
3295 }
3296
3297 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3298 logical_port_id);
3299 } else {
3300 ehea_remove_adapter_mr(adapter);
3301 return -EIO;
3302 }
3303
3304 return (ssize_t) count;
3305 }
3306
ehea_remove_port(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)3307 static ssize_t ehea_remove_port(struct device *dev,
3308 struct device_attribute *attr,
3309 const char *buf, size_t count)
3310 {
3311 struct ehea_adapter *adapter = dev->driver_data;
3312 struct ehea_port *port;
3313 int i;
3314 u32 logical_port_id;
3315
3316 sscanf(buf, "%d", &logical_port_id);
3317
3318 port = ehea_get_port(adapter, logical_port_id);
3319
3320 if (port) {
3321 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3322 logical_port_id);
3323
3324 ehea_shutdown_single_port(port);
3325
3326 for (i = 0; i < EHEA_MAX_PORTS; i++)
3327 if (adapter->port[i] == port) {
3328 adapter->port[i] = NULL;
3329 break;
3330 }
3331 } else {
3332 ehea_error("removing port with logical port id=%d failed. port "
3333 "not configured.", logical_port_id);
3334 return -EINVAL;
3335 }
3336
3337 ehea_remove_adapter_mr(adapter);
3338
3339 return (ssize_t) count;
3340 }
3341
3342 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3343 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3344
ehea_create_device_sysfs(struct of_device * dev)3345 int ehea_create_device_sysfs(struct of_device *dev)
3346 {
3347 int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3348 if (ret)
3349 goto out;
3350
3351 ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3352 out:
3353 return ret;
3354 }
3355
ehea_remove_device_sysfs(struct of_device * dev)3356 void ehea_remove_device_sysfs(struct of_device *dev)
3357 {
3358 device_remove_file(&dev->dev, &dev_attr_probe_port);
3359 device_remove_file(&dev->dev, &dev_attr_remove_port);
3360 }
3361
ehea_probe_adapter(struct of_device * dev,const struct of_device_id * id)3362 static int __devinit ehea_probe_adapter(struct of_device *dev,
3363 const struct of_device_id *id)
3364 {
3365 struct ehea_adapter *adapter;
3366 const u64 *adapter_handle;
3367 int ret;
3368
3369 if (!dev || !dev->node) {
3370 ehea_error("Invalid ibmebus device probed");
3371 return -EINVAL;
3372 }
3373 mutex_lock(&ehea_fw_handles.lock);
3374
3375 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3376 if (!adapter) {
3377 ret = -ENOMEM;
3378 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3379 goto out;
3380 }
3381
3382 list_add(&adapter->list, &adapter_list);
3383
3384 adapter->ofdev = dev;
3385
3386 adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3387 NULL);
3388 if (adapter_handle)
3389 adapter->handle = *adapter_handle;
3390
3391 if (!adapter->handle) {
3392 dev_err(&dev->dev, "failed getting handle for adapter"
3393 " '%s'\n", dev->node->full_name);
3394 ret = -ENODEV;
3395 goto out_free_ad;
3396 }
3397
3398 adapter->pd = EHEA_PD_ID;
3399
3400 dev->dev.driver_data = adapter;
3401
3402
3403 /* initialize adapter and ports */
3404 /* get adapter properties */
3405 ret = ehea_sense_adapter_attr(adapter);
3406 if (ret) {
3407 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3408 goto out_free_ad;
3409 }
3410
3411 adapter->neq = ehea_create_eq(adapter,
3412 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3413 if (!adapter->neq) {
3414 ret = -EIO;
3415 dev_err(&dev->dev, "NEQ creation failed\n");
3416 goto out_free_ad;
3417 }
3418
3419 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3420 (unsigned long)adapter);
3421
3422 ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3423 ehea_interrupt_neq, IRQF_DISABLED,
3424 "ehea_neq", adapter);
3425 if (ret) {
3426 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3427 goto out_kill_eq;
3428 }
3429
3430 ret = ehea_create_device_sysfs(dev);
3431 if (ret)
3432 goto out_free_irq;
3433
3434 ret = ehea_setup_ports(adapter);
3435 if (ret) {
3436 dev_err(&dev->dev, "setup_ports failed\n");
3437 goto out_rem_dev_sysfs;
3438 }
3439
3440 ret = 0;
3441 goto out;
3442
3443 out_rem_dev_sysfs:
3444 ehea_remove_device_sysfs(dev);
3445
3446 out_free_irq:
3447 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3448
3449 out_kill_eq:
3450 ehea_destroy_eq(adapter->neq);
3451
3452 out_free_ad:
3453 kfree(adapter);
3454
3455 out:
3456 ehea_update_firmware_handles();
3457 mutex_unlock(&ehea_fw_handles.lock);
3458 return ret;
3459 }
3460
ehea_remove(struct of_device * dev)3461 static int __devexit ehea_remove(struct of_device *dev)
3462 {
3463 struct ehea_adapter *adapter = dev->dev.driver_data;
3464 int i;
3465
3466 for (i = 0; i < EHEA_MAX_PORTS; i++)
3467 if (adapter->port[i]) {
3468 ehea_shutdown_single_port(adapter->port[i]);
3469 adapter->port[i] = NULL;
3470 }
3471
3472 ehea_remove_device_sysfs(dev);
3473
3474 flush_scheduled_work();
3475
3476 mutex_lock(&ehea_fw_handles.lock);
3477
3478 ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3479 tasklet_kill(&adapter->neq_tasklet);
3480
3481 ehea_destroy_eq(adapter->neq);
3482 ehea_remove_adapter_mr(adapter);
3483 list_del(&adapter->list);
3484 kfree(adapter);
3485
3486 ehea_update_firmware_handles();
3487 mutex_unlock(&ehea_fw_handles.lock);
3488
3489 return 0;
3490 }
3491
ehea_crash_handler(void)3492 void ehea_crash_handler(void)
3493 {
3494 int i;
3495
3496 if (ehea_fw_handles.arr)
3497 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3498 ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3499 ehea_fw_handles.arr[i].fwh,
3500 FORCE_FREE);
3501
3502 if (ehea_bcmc_regs.arr)
3503 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3504 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3505 ehea_bcmc_regs.arr[i].port_id,
3506 ehea_bcmc_regs.arr[i].reg_type,
3507 ehea_bcmc_regs.arr[i].macaddr,
3508 0, H_DEREG_BCMC);
3509 }
3510
ehea_mem_notifier(struct notifier_block * nb,unsigned long action,void * data)3511 static int ehea_mem_notifier(struct notifier_block *nb,
3512 unsigned long action, void *data)
3513 {
3514 struct memory_notify *arg = data;
3515 switch (action) {
3516 case MEM_CANCEL_OFFLINE:
3517 ehea_info("memory offlining canceled");
3518 /* Readd canceled memory block */
3519 case MEM_ONLINE:
3520 ehea_info("memory is going online");
3521 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3522 return NOTIFY_BAD;
3523 ehea_rereg_mrs(NULL);
3524 break;
3525 case MEM_GOING_OFFLINE:
3526 ehea_info("memory is going offline");
3527 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3528 return NOTIFY_BAD;
3529 ehea_rereg_mrs(NULL);
3530 break;
3531 default:
3532 break;
3533 }
3534 return NOTIFY_OK;
3535 }
3536
3537 static struct notifier_block ehea_mem_nb = {
3538 .notifier_call = ehea_mem_notifier,
3539 };
3540
ehea_reboot_notifier(struct notifier_block * nb,unsigned long action,void * unused)3541 static int ehea_reboot_notifier(struct notifier_block *nb,
3542 unsigned long action, void *unused)
3543 {
3544 if (action == SYS_RESTART) {
3545 ehea_info("Reboot: freeing all eHEA resources");
3546 ibmebus_unregister_driver(&ehea_driver);
3547 }
3548 return NOTIFY_DONE;
3549 }
3550
3551 static struct notifier_block ehea_reboot_nb = {
3552 .notifier_call = ehea_reboot_notifier,
3553 };
3554
check_module_parm(void)3555 static int check_module_parm(void)
3556 {
3557 int ret = 0;
3558
3559 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3560 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3561 ehea_info("Bad parameter: rq1_entries");
3562 ret = -EINVAL;
3563 }
3564 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3565 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3566 ehea_info("Bad parameter: rq2_entries");
3567 ret = -EINVAL;
3568 }
3569 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3570 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3571 ehea_info("Bad parameter: rq3_entries");
3572 ret = -EINVAL;
3573 }
3574 if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3575 (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3576 ehea_info("Bad parameter: sq_entries");
3577 ret = -EINVAL;
3578 }
3579
3580 return ret;
3581 }
3582
ehea_show_capabilities(struct device_driver * drv,char * buf)3583 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3584 char *buf)
3585 {
3586 return sprintf(buf, "%d", EHEA_CAPABILITIES);
3587 }
3588
3589 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3590 ehea_show_capabilities, NULL);
3591
ehea_module_init(void)3592 int __init ehea_module_init(void)
3593 {
3594 int ret;
3595
3596 printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3597 DRV_VERSION);
3598
3599
3600 INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3601 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3602 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3603
3604 mutex_init(&ehea_fw_handles.lock);
3605 spin_lock_init(&ehea_bcmc_regs.lock);
3606
3607 ret = check_module_parm();
3608 if (ret)
3609 goto out;
3610
3611 ret = ehea_create_busmap();
3612 if (ret)
3613 goto out;
3614
3615 ret = register_reboot_notifier(&ehea_reboot_nb);
3616 if (ret)
3617 ehea_info("failed registering reboot notifier");
3618
3619 ret = register_memory_notifier(&ehea_mem_nb);
3620 if (ret)
3621 ehea_info("failed registering memory remove notifier");
3622
3623 ret = crash_shutdown_register(&ehea_crash_handler);
3624 if (ret)
3625 ehea_info("failed registering crash handler");
3626
3627 ret = ibmebus_register_driver(&ehea_driver);
3628 if (ret) {
3629 ehea_error("failed registering eHEA device driver on ebus");
3630 goto out2;
3631 }
3632
3633 ret = driver_create_file(&ehea_driver.driver,
3634 &driver_attr_capabilities);
3635 if (ret) {
3636 ehea_error("failed to register capabilities attribute, ret=%d",
3637 ret);
3638 goto out3;
3639 }
3640
3641 return ret;
3642
3643 out3:
3644 ibmebus_unregister_driver(&ehea_driver);
3645 out2:
3646 unregister_memory_notifier(&ehea_mem_nb);
3647 unregister_reboot_notifier(&ehea_reboot_nb);
3648 crash_shutdown_unregister(&ehea_crash_handler);
3649 out:
3650 return ret;
3651 }
3652
ehea_module_exit(void)3653 static void __exit ehea_module_exit(void)
3654 {
3655 int ret;
3656
3657 flush_scheduled_work();
3658 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3659 ibmebus_unregister_driver(&ehea_driver);
3660 unregister_reboot_notifier(&ehea_reboot_nb);
3661 ret = crash_shutdown_unregister(&ehea_crash_handler);
3662 if (ret)
3663 ehea_info("failed unregistering crash handler");
3664 unregister_memory_notifier(&ehea_mem_nb);
3665 kfree(ehea_fw_handles.arr);
3666 kfree(ehea_bcmc_regs.arr);
3667 ehea_destroy_busmap();
3668 }
3669
3670 module_init(ehea_module_init);
3671 module_exit(ehea_module_exit);
3672