1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 /*
27 * The Ethernet Over Infiniband Nexus driver is a bus nexus driver
28 * that enumerates all the EoIB nodes.
29 */
30
31 #include <sys/types.h>
32 #include <sys/conf.h>
33 #include <sys/devops.h>
34 #include <sys/kmem.h>
35 #include <sys/ksynch.h>
36 #include <sys/modctl.h>
37 #include <sys/stat.h>
38 #include <sys/ddi.h>
39 #include <sys/sunddi.h>
40 #include <sys/sunndi.h>
41
42 #include <sys/ib/clients/eoib/enx_impl.h>
43
44 /*
45 * Global per-instance EoIB Nexus data. Only one instance
46 * of EoIB Nexus is supported
47 */
48 eibnx_t *enx_global_ss = NULL;
49
50 /*
51 * Static function declarations
52 */
53 static int eibnx_attach(dev_info_t *, ddi_attach_cmd_t);
54 static int eibnx_detach(dev_info_t *, ddi_detach_cmd_t);
55 static int eibnx_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **);
56 static int eibnx_bus_ctl(dev_info_t *, dev_info_t *, ddi_ctl_enum_t,
57 void *, void *);
58
59 static int eibnx_get_eventcookie(dev_info_t *, dev_info_t *, char *,
60 ddi_eventcookie_t *);
61 static int eibnx_add_eventcall(dev_info_t *, dev_info_t *, ddi_eventcookie_t,
62 void (*)(dev_info_t *, ddi_eventcookie_t, void *, void *),
63 void *, ddi_callback_id_t *);
64 static int eibnx_remove_eventcall(dev_info_t *, ddi_callback_id_t);
65 static int eibnx_post_event(dev_info_t *, dev_info_t *,
66 ddi_eventcookie_t, void *);
67
68 static int eibnx_bus_config(dev_info_t *, uint_t, ddi_bus_config_op_t,
69 void *, dev_info_t **);
70 static int eibnx_bus_unconfig(dev_info_t *, uint_t, ddi_bus_config_op_t,
71 void *);
72 static int eibnx_config_all_children(dev_info_t *);
73 static void eibnx_unconfig_all_children(dev_info_t *);
74 static int eibnx_config_child(char *, dev_info_t **);
75 static int eibnx_unconfig_child(char *);
76
77 /*
78 * Cbops
79 */
80 static struct cb_ops enx_cb_ops = {
81 eibnx_devctl_open, /* cb_open */
82 eibnx_devctl_close, /* cb_close */
83 nodev, /* cb_strategy */
84 nodev, /* cb_print */
85 nodev, /* cb_dump */
86 nodev, /* cb_read */
87 nodev, /* cb_write */
88 eibnx_devctl_ioctl, /* cb_ioctl */
89 nodev, /* cb_devmap */
90 nodev, /* cb_mmap */
91 nodev, /* cb_segmap */
92 nochpoll, /* cb_chpoll */
93 ddi_prop_op, /* cb_prop_op */
94 NULL, /* cb_str */
95 D_MP, /* cb_flag */
96 CB_REV, /* cb_rev */
97 nodev, /* cb_aread */
98 nodev /* cb_awrite */
99 };
100
101 /*
102 * Busops
103 */
104 static struct bus_ops enx_bus_ops = {
105 BUSO_REV,
106 nullbusmap, /* bus_map */
107 NULL, /* bus_get_intrspec */
108 NULL, /* bus_add_intrspec */
109 NULL, /* bus_remove_intrspec */
110 i_ddi_map_fault, /* bus_map_fault */
111 ddi_no_dma_map, /* bus_dma_map */
112 NULL, /* bus_dma_allochdl */
113 NULL, /* bus_dma_freehdl */
114 NULL, /* bus_dma_bindhdl */
115 NULL, /* bus_dma_unbindhdl */
116 NULL, /* bus_dma_flush */
117 NULL, /* bus_dma_win */
118 NULL, /* bus_dma_ctl */
119 eibnx_bus_ctl, /* bus_ctl */
120 ddi_bus_prop_op, /* bus_prop_op */
121 eibnx_get_eventcookie, /* bus_get_eventcookie */
122 eibnx_add_eventcall, /* bus_add_eventcall */
123 eibnx_remove_eventcall, /* bus_remove_eventcall */
124 eibnx_post_event, /* bus_post_event */
125 NULL, /* bus_intr_ctl */
126 eibnx_bus_config, /* bus_config */
127 eibnx_bus_unconfig, /* bus_unconfig */
128 };
129
130 /*
131 * Nexus ops
132 */
133 static struct dev_ops enx_ops = {
134 DEVO_REV, /* devo_rev, */
135 0, /* devo_refcnt */
136 eibnx_getinfo, /* devo_info */
137 nulldev, /* devo_identify */
138 nulldev, /* devo_probe */
139 eibnx_attach, /* devo_attach */
140 eibnx_detach, /* devo_detach */
141 nodev, /* devo_reset */
142 &enx_cb_ops, /* devo_cb_ops */
143 &enx_bus_ops, /* devo_bus_ops */
144 nulldev, /* devo_power */
145 ddi_quiesce_not_needed /* devo_quiesce */
146 };
147
148 /*
149 * Module linkage information for the kernel
150 */
151 static struct modldrv enx_modldrv = {
152 &mod_driverops, /* Driver module */
153 "EoIB Nexus", /* Driver name and version */
154 &enx_ops, /* Driver ops */
155 };
156
157 static struct modlinkage enx_modlinkage = {
158 MODREV_1, { (void *)&enx_modldrv, NULL }
159 };
160
161 /*
162 * EoIB NDI events
163 */
164 static ndi_event_definition_t enx_ndi_event_defs[] = {
165 { ENX_EVENT_TAG_GW_INFO_UPDATE, EIB_NDI_EVENT_GW_INFO_UPDATE,
166 EPL_KERNEL, NDI_EVENT_POST_TO_TGT },
167 { ENX_EVENT_TAG_GW_AVAILABLE, EIB_NDI_EVENT_GW_AVAILABLE,
168 EPL_KERNEL, NDI_EVENT_POST_TO_TGT },
169 { ENX_EVENT_TAG_LOGIN_ACK, EIB_NDI_EVENT_LOGIN_ACK,
170 EPL_KERNEL, NDI_EVENT_POST_TO_TGT }
171 };
172 #define ENX_NUM_NDI_EVENTS \
173 (sizeof (enx_ndi_event_defs) / sizeof (enx_ndi_event_defs[0]))
174
175 static ndi_event_set_t enx_ndi_events = {
176 NDI_EVENTS_REV1,
177 ENX_NUM_NDI_EVENTS,
178 enx_ndi_event_defs
179 };
180 ndi_event_hdl_t enx_ndi_event_hdl;
181
182
183 /*
184 * Common loadable module entry points _init, _fini, _info
185 */
186
187 int
188 _init(void)
189 {
190 int ret;
191
192 if ((ret = mod_install(&enx_modlinkage)) == 0)
193 eibnx_debug_init();
194
195 return (ret);
196 }
197
198 int
199 _fini(void)
200 {
201 int ret;
202
203 if ((ret = mod_remove(&enx_modlinkage)) == 0)
204 eibnx_debug_fini();
205
206 return (ret);
207 }
208
209 int
210 _info(struct modinfo *modinfop)
211 {
212 return (mod_info(&enx_modlinkage, modinfop));
213 }
214
215 /*
216 * Autoconfiguration entry points: attach, detach, getinfo
217 */
218
219 static int
220 eibnx_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
221 {
222 eibnx_t *ss;
223 int instance;
224
225 if (cmd == DDI_RESUME)
226 return (DDI_SUCCESS);
227 else if (cmd != DDI_ATTACH)
228 return (DDI_FAILURE);
229
230 /*
231 * Don't allow more than one instance to attach
232 */
233 if (enx_global_ss)
234 return (DDI_FAILURE);
235
236 /*
237 * Alloc this instance's softstate
238 */
239 ss = kmem_zalloc(sizeof (eibnx_t), KM_SLEEP);
240 ss->nx_dip = dip;
241
242 enx_global_ss = ss;
243
244 /*
245 * Allocate our NDI event handle and bind our event set
246 */
247 if (ndi_event_alloc_hdl(dip, 0, &enx_ndi_event_hdl,
248 NDI_SLEEP) != NDI_SUCCESS) {
249 ENX_DPRINTF_ERR("ndi_event_alloc_hdl(dip=0x%llx) "
250 "failed", dip);
251
252 kmem_free(enx_global_ss, sizeof (eibnx_t));
253 enx_global_ss = NULL;
254 return (DDI_FAILURE);
255 }
256 if (ndi_event_bind_set(enx_ndi_event_hdl, &enx_ndi_events,
257 NDI_SLEEP) != NDI_SUCCESS) {
258 ENX_DPRINTF_ERR("ndi_event_bind_set(ndi_event_hdl=0x%llx) "
259 "failed", enx_ndi_event_hdl);
260
261 (void) ndi_event_free_hdl(enx_ndi_event_hdl);
262 enx_ndi_event_hdl = NULL;
263 kmem_free(enx_global_ss, sizeof (eibnx_t));
264 enx_global_ss = NULL;
265 return (DDI_FAILURE);
266 }
267
268 /*
269 * Create "devctl" minor node for general ioctl interface to the
270 * eoib nexus. If we cannot, it isn't fatal - we'll operate without
271 * the support for devctl (but issue a warning).
272 */
273 instance = ddi_get_instance(dip);
274 if (ddi_create_minor_node(dip, "devctl", S_IFCHR, instance,
275 DDI_NT_NEXUS, 0) != DDI_SUCCESS) {
276 ENX_DPRINTF_WARN("could not create devctl minor node "
277 "for instance %d", instance);
278 }
279
280 /*
281 * Do IBTF related initializations. If we fail, we cannot operate,
282 * so fail the attach.
283 */
284 if (eibnx_ibt_init(ss) != ENX_E_SUCCESS) {
285 (void) ddi_remove_minor_node(dip, NULL);
286 (void) ndi_event_unbind_set(enx_ndi_event_hdl,
287 &enx_ndi_events, NDI_SLEEP);
288 (void) ndi_event_free_hdl(enx_ndi_event_hdl);
289 enx_ndi_event_hdl = NULL;
290 kmem_free(enx_global_ss, sizeof (eibnx_t));
291 enx_global_ss = NULL;
292 return (DDI_FAILURE);
293 }
294
295 return (DDI_SUCCESS);
296 }
297
298 static int
299 eibnx_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
300 {
301 eibnx_t *ss = enx_global_ss;
302
303 if (cmd == DDI_SUSPEND)
304 return (DDI_SUCCESS);
305 else if (cmd != DDI_DETACH)
306 return (DDI_FAILURE);
307
308 /*
309 * If there's no instance of eibnx attached, fail
310 */
311 if (ss == NULL)
312 return (DDI_FAILURE);
313
314 /*
315 * Before we do anything, we need to stop the port monitors
316 * we may have started earlier.
317 */
318 eibnx_terminate_monitors();
319
320 /*
321 * If eibnx_ibt_fini() fails, it could be because one of the
322 * HCA's pd could not be freed, the hca could not be closed
323 * or the IBTF detach wasn't successful. If this is the case,
324 * we have to return failure, but cannot do much about the
325 * port monitors we've already terminated.
326 */
327 if (eibnx_ibt_fini(ss) == ENX_E_FAILURE)
328 return (DDI_FAILURE);
329
330 /*
331 * Cleanup any devctl minor node we may have created, unbind and
332 * free ndi event handle and free the instance softstate.
333 */
334 (void) ddi_remove_minor_node(dip, NULL);
335 (void) ndi_event_unbind_set(enx_ndi_event_hdl,
336 &enx_ndi_events, NDI_SLEEP);
337 (void) ndi_event_free_hdl(enx_ndi_event_hdl);
338 enx_ndi_event_hdl = NULL;
339 kmem_free(enx_global_ss, sizeof (eibnx_t));
340 enx_global_ss = NULL;
341
342 return (DDI_SUCCESS);
343 }
344
345 /*ARGSUSED*/
346 static int
347 eibnx_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **resultp)
348 {
349 eibnx_t *ss = enx_global_ss;
350 int ret;
351
352 if (cmd == DDI_INFO_DEVT2DEVINFO) {
353 *resultp = (ss) ? ss->nx_dip : NULL;
354 ret = (ss) ? DDI_SUCCESS : DDI_FAILURE;
355 } else if (cmd == DDI_INFO_DEVT2INSTANCE) {
356 *resultp = 0;
357 ret = DDI_SUCCESS;
358 } else {
359 ret = DDI_FAILURE;
360 }
361
362 return (ret);
363 }
364
365 /*
366 * Busops: bus_ctl, bus_config, bus_unconfig
367 */
368
369 /*ARGSUSED*/
370 static int
371 eibnx_bus_ctl(dev_info_t *dip, dev_info_t *rdip, ddi_ctl_enum_t ctlop,
372 void *arg, void *result)
373 {
374 dev_info_t *child = arg;
375 int ret;
376 char name[MAXNAMELEN];
377
378 switch (ctlop) {
379 case DDI_CTLOPS_REPORTDEV:
380 ENX_DPRINTF_DEBUG("EoIB device: %s@%s, %s%d",
381 ddi_node_name(rdip), ddi_get_name_addr(rdip),
382 ddi_driver_name(rdip), ddi_get_instance(rdip));
383 /*FALLTHROUGH*/
384
385 case DDI_CTLOPS_ATTACH:
386 case DDI_CTLOPS_DETACH:
387 case DDI_CTLOPS_POWER:
388 case DDI_CTLOPS_SIDDEV:
389 case DDI_CTLOPS_IOMIN:
390 ret = DDI_SUCCESS;
391 break;
392
393 case DDI_CTLOPS_INITCHILD:
394 if ((ret = eibnx_name_child(child, name,
395 sizeof (name))) == DDI_SUCCESS) {
396 ddi_set_name_addr(child, name);
397 }
398 break;
399
400 case DDI_CTLOPS_UNINITCHILD:
401 ddi_set_name_addr(child, NULL);
402 ret = DDI_SUCCESS;
403 break;
404
405 default:
406 ret = ddi_ctlops(dip, rdip, ctlop, arg, result);
407 break;
408 }
409
410 return (ret);
411 }
412
413 /*ARGSUSED*/
414 static int
415 eibnx_bus_config(dev_info_t *parent, uint_t flags,
416 ddi_bus_config_op_t op, void *arg, dev_info_t **childp)
417 {
418 eibnx_t *ss = enx_global_ss;
419 int ret = NDI_SUCCESS;
420
421 switch (op) {
422 case BUS_CONFIG_ONE:
423 eibnx_busop_inprog_enter(ss);
424 ret = eibnx_config_child(arg, childp);
425 eibnx_busop_inprog_exit(ss);
426 break;
427
428 case BUS_CONFIG_ALL:
429 case BUS_CONFIG_DRIVER:
430 eibnx_busop_inprog_enter(ss);
431 if ((ss->nx_busop_flags & NX_FL_BUSCFG_COMPLETE) == 0) {
432 ret = eibnx_config_all_children(parent);
433 if (ret == NDI_SUCCESS)
434 ss->nx_busop_flags |= NX_FL_BUSCFG_COMPLETE;
435 }
436 eibnx_busop_inprog_exit(ss);
437 break;
438
439 default:
440 ret = NDI_FAILURE;
441 }
442
443 if (ret == NDI_SUCCESS)
444 ret = ndi_busop_bus_config(parent, flags, op, arg, childp, 0);
445
446 return (ret);
447 }
448
449 static int
450 eibnx_bus_unconfig(dev_info_t *parent, uint_t flags,
451 ddi_bus_config_op_t op, void *arg)
452 {
453 eibnx_t *ss = enx_global_ss;
454 int ret;
455
456 ret = ndi_busop_bus_unconfig(parent, flags, op, arg);
457 if (ret != NDI_SUCCESS)
458 return (ret);
459
460 switch (op) {
461 case BUS_UNCONFIG_ONE:
462 if (flags & (NDI_UNCONFIG | NDI_DEVI_REMOVE)) {
463 eibnx_busop_inprog_enter(ss);
464
465 if ((ret = eibnx_unconfig_child(arg)) == ENX_E_SUCCESS)
466 ss->nx_busop_flags &= (~NX_FL_BUSCFG_COMPLETE);
467 else {
468 ENX_DPRINTF_DEBUG("eibnx_bus_config: "
469 "unconfig child %s failed", (char *)arg);
470 }
471
472 eibnx_busop_inprog_exit(ss);
473 }
474 break;
475
476 case BUS_UNCONFIG_ALL:
477 case BUS_UNCONFIG_DRIVER:
478 if (flags & (NDI_UNCONFIG | NDI_DEVI_REMOVE)) {
479 eibnx_busop_inprog_enter(ss);
480
481 eibnx_unconfig_all_children(parent);
482 ss->nx_busop_flags &= (~NX_FL_BUSCFG_COMPLETE);
483
484 eibnx_busop_inprog_exit(ss);
485 }
486 break;
487
488 default:
489 break;
490 }
491
492 return (ret);
493 }
494
495 /*
496 * Event Handling: bus_get_eventcookie, bus_add_eventcall, bus_remove_eventcall
497 * and bus_post_event
498 */
499
500 /*ARGSUSED*/
501 static int
502 eibnx_get_eventcookie(dev_info_t *dip, dev_info_t *rdip,
503 char *name, ddi_eventcookie_t *cookiep)
504 {
505 return (ndi_event_retrieve_cookie(enx_ndi_event_hdl, rdip, name,
506 cookiep, NDI_EVENT_NOPASS));
507 }
508
509 /*ARGSUSED*/
510 static int
511 eibnx_add_eventcall(dev_info_t *dip, dev_info_t *rdip, ddi_eventcookie_t cookie,
512 void (*callback)(dev_info_t *cb_dip, ddi_eventcookie_t cb_cookie,
513 void *cb_arg, void *cb_impl_data),
514 void *arg, ddi_callback_id_t *cb_id)
515 {
516 return (ndi_event_add_callback(enx_ndi_event_hdl, rdip, cookie,
517 callback, arg, NDI_SLEEP, cb_id));
518 }
519
520 /*ARGSUSED*/
521 static int
522 eibnx_remove_eventcall(dev_info_t *dip, ddi_callback_id_t cb_id)
523 {
524 return (ndi_event_remove_callback(enx_ndi_event_hdl, cb_id));
525 }
526
527 /*ARGSUSED*/
528 static int
529 eibnx_post_event(dev_info_t *dip, dev_info_t *rdip,
530 ddi_eventcookie_t cookie, void *impl_data)
531 {
532 return (ndi_event_run_callbacks(enx_ndi_event_hdl, rdip, cookie,
533 impl_data));
534 }
535
536 /*
537 * Routines to configure/unconfigure EoIB node(s) on a system.
538 */
539
540 /*ARGSUSED*/
541 static int
542 eibnx_config_all_children(dev_info_t *parent)
543 {
544 eibnx_t *ss = enx_global_ss;
545 eibnx_hca_t *hca;
546 eibnx_port_t *port;
547 eibnx_thr_info_t *ti;
548 eibnx_thr_info_t *ti_tail;
549 eibnx_gw_info_t *gwi;
550
551 /*
552 * Go through each port of each hca and create a thread to solicit,
553 * monitor, receive advertisements, create eoib nodes and attach eoib
554 * driver instances.
555 */
556 mutex_enter(&ss->nx_lock);
557 if (!ss->nx_monitors_up) {
558 ss->nx_thr_info = ti_tail = NULL;
559 for (hca = ss->nx_hca; hca; hca = hca->hc_next) {
560 for (port = hca->hc_port; port; port = port->po_next) {
561 ti = eibnx_start_port_monitor(hca, port);
562 if (ti_tail) {
563 ti_tail->ti_next = ti;
564 } else {
565 ss->nx_thr_info = ti;
566 }
567 ti_tail = ti;
568 }
569 }
570
571 ss->nx_monitors_up = B_TRUE;
572 mutex_exit(&ss->nx_lock);
573
574 return (NDI_SUCCESS);
575 }
576 mutex_exit(&ss->nx_lock);
577
578 while (eibnx_locate_unconfigured_node(&ti, &gwi) == ENX_E_SUCCESS)
579 (void) eibnx_configure_node(ti, gwi, NULL);
580
581 return (NDI_SUCCESS);
582 }
583
584 /*
585 * Routine to unconfigure all the EoIB nodes on a system. This terminates
586 * all the per-port monitor threads and releases any resources allocated.
587 */
588
589 /*ARGSUSED*/
590 static void
591 eibnx_unconfig_all_children(dev_info_t *parent)
592 {
593 eibnx_t *ss = enx_global_ss;
594 eibnx_thr_info_t *ti;
595 eibnx_child_t *ch;
596
597 mutex_enter(&ss->nx_lock);
598 for (ti = ss->nx_thr_info; ti; ti = ti->ti_next) {
599 mutex_enter(&ti->ti_child_lock);
600 for (ch = ti->ti_child; ch; ch = ch->ch_next) {
601 ch->ch_dip = NULL;
602 }
603 mutex_exit(&ti->ti_child_lock);
604 }
605 mutex_exit(&ss->nx_lock);
606 }
607
608 /*ARGSUSED*/
609 static int
610 eibnx_config_child(char *devname, dev_info_t **childp)
611 {
612 eibnx_thr_info_t *ti;
613 eibnx_gw_info_t *gwi;
614
615 if (eibnx_locate_node_name(devname, &ti, &gwi) == ENX_E_FAILURE) {
616 ENX_DPRINTF_DEBUG("eibnx_config_child: invalid eoib "
617 "nodename %s, no such address", devname);
618 return (ENX_E_FAILURE);
619 }
620
621 return (eibnx_configure_node(ti, gwi, childp));
622 }
623
624 /*ARGSUSED*/
625 static int
626 eibnx_unconfig_child(char *devname)
627 {
628 eibnx_thr_info_t *ti;
629 eibnx_gw_info_t *gwi;
630
631 if (eibnx_locate_node_name(devname, &ti, &gwi) == ENX_E_FAILURE) {
632 ENX_DPRINTF_DEBUG("eibnx_unconfig_child: invalid eoib "
633 "nodename %s, no such address", devname);
634 return (ENX_E_FAILURE);
635 }
636
637 return (eibnx_unconfigure_node(ti, gwi));
638 }