1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
5 * Maintained at www.Open-FCoE.org
8 #include <linux/module.h>
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/etherdevice.h>
12 #include <linux/ctype.h>
14 #include <scsi/fcoe_sysfs.h>
15 #include <scsi/libfcoe.h>
18 * OK to include local libfcoe.h for debug_logging, but cannot include
19 * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
20 * have to include more than fcoe_sysfs.h.
24 static atomic_t ctlr_num;
25 static atomic_t fcf_num;
28 * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
29 * should insulate the loss of a fcf.
31 static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */
33 module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
34 uint, S_IRUGO|S_IWUSR);
35 MODULE_PARM_DESC(fcf_dev_loss_tmo,
36 "Maximum number of seconds that libfcoe should"
37 " insulate the loss of a fcf. Once this value is"
38 " exceeded, the fcf is removed.");
41 * These are used by the fcoe_*_show_function routines, they
42 * are intentionally placed in the .c file as they're not intended
43 * for use throughout the code.
45 #define fcoe_ctlr_id(x) \
47 #define fcoe_ctlr_work_q_name(x) \
49 #define fcoe_ctlr_work_q(x) \
51 #define fcoe_ctlr_devloss_work_q_name(x) \
52 ((x)->devloss_work_q_name)
53 #define fcoe_ctlr_devloss_work_q(x) \
55 #define fcoe_ctlr_mode(x) \
57 #define fcoe_ctlr_fcf_dev_loss_tmo(x) \
58 ((x)->fcf_dev_loss_tmo)
59 #define fcoe_ctlr_link_fail(x) \
60 ((x)->lesb.lesb_link_fail)
61 #define fcoe_ctlr_vlink_fail(x) \
62 ((x)->lesb.lesb_vlink_fail)
63 #define fcoe_ctlr_miss_fka(x) \
64 ((x)->lesb.lesb_miss_fka)
65 #define fcoe_ctlr_symb_err(x) \
66 ((x)->lesb.lesb_symb_err)
67 #define fcoe_ctlr_err_block(x) \
68 ((x)->lesb.lesb_err_block)
69 #define fcoe_ctlr_fcs_error(x) \
70 ((x)->lesb.lesb_fcs_error)
71 #define fcoe_ctlr_enabled(x) \
73 #define fcoe_fcf_state(x) \
75 #define fcoe_fcf_fabric_name(x) \
77 #define fcoe_fcf_switch_name(x) \
79 #define fcoe_fcf_fc_map(x) \
81 #define fcoe_fcf_vfid(x) \
83 #define fcoe_fcf_mac(x) \
85 #define fcoe_fcf_priority(x) \
87 #define fcoe_fcf_fka_period(x) \
89 #define fcoe_fcf_dev_loss_tmo(x) \
91 #define fcoe_fcf_selected(x) \
93 #define fcoe_fcf_vlan_id(x) \
97 * dev_loss_tmo attribute
99 static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
103 ret = kstrtoul(buf, 0, val);
107 * Check for overflow; dev_loss_tmo is u32
115 static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
118 if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
119 (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
120 (fcf->state == FCOE_FCF_STATE_DELETED))
123 * Check for overflow; dev_loss_tmo is u32
128 fcoe_fcf_dev_loss_tmo(fcf) = val;
132 #define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \
133 struct device_attribute device_attr_fcoe_##_prefix##_##_name = \
134 __ATTR(_name, _mode, _show, _store)
136 #define fcoe_ctlr_show_function(field, format_string, sz, cast) \
137 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
138 struct device_attribute *attr, \
141 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
142 if (ctlr->f->get_fcoe_ctlr_##field) \
143 ctlr->f->get_fcoe_ctlr_##field(ctlr); \
144 return snprintf(buf, sz, format_string, \
145 cast fcoe_ctlr_##field(ctlr)); \
148 #define fcoe_fcf_show_function(field, format_string, sz, cast) \
149 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
150 struct device_attribute *attr, \
153 struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
154 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \
155 if (ctlr->f->get_fcoe_fcf_##field) \
156 ctlr->f->get_fcoe_fcf_##field(fcf); \
157 return snprintf(buf, sz, format_string, \
158 cast fcoe_fcf_##field(fcf)); \
161 #define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
162 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
163 struct device_attribute *attr, \
166 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
167 return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
170 #define fcoe_fcf_private_show_function(field, format_string, sz, cast) \
171 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
172 struct device_attribute *attr, \
175 struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
176 return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
179 #define fcoe_ctlr_private_rd_attr(field, format_string, sz) \
180 fcoe_ctlr_private_show_function(field, format_string, sz, ) \
181 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
182 show_fcoe_ctlr_device_##field, NULL)
184 #define fcoe_ctlr_rd_attr(field, format_string, sz) \
185 fcoe_ctlr_show_function(field, format_string, sz, ) \
186 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
187 show_fcoe_ctlr_device_##field, NULL)
189 #define fcoe_fcf_rd_attr(field, format_string, sz) \
190 fcoe_fcf_show_function(field, format_string, sz, ) \
191 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
192 show_fcoe_fcf_device_##field, NULL)
194 #define fcoe_fcf_private_rd_attr(field, format_string, sz) \
195 fcoe_fcf_private_show_function(field, format_string, sz, ) \
196 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
197 show_fcoe_fcf_device_##field, NULL)
199 #define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \
200 fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
201 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
202 show_fcoe_ctlr_device_##field, NULL)
204 #define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \
205 fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
206 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
207 show_fcoe_fcf_device_##field, NULL)
209 #define fcoe_enum_name_search(title, table_type, table) \
210 static const char *get_fcoe_##title##_name(enum table_type table_key) \
212 if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \
214 return table[table_key]; \
217 static char *fip_conn_type_names[] = {
218 [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
219 [ FIP_CONN_TYPE_FABRIC ] = "Fabric",
220 [ FIP_CONN_TYPE_VN2VN ] = "VN2VN",
222 fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
224 static enum fip_conn_type fcoe_parse_mode(const char *buf)
228 for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
229 if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
233 return FIP_CONN_TYPE_UNKNOWN;
236 static char *fcf_state_names[] = {
237 [ FCOE_FCF_STATE_UNKNOWN ] = "Unknown",
238 [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
239 [ FCOE_FCF_STATE_CONNECTED ] = "Connected",
241 fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
242 #define FCOE_FCF_STATE_MAX_NAMELEN 50
244 static ssize_t show_fcf_state(struct device *dev,
245 struct device_attribute *attr,
248 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
250 name = get_fcoe_fcf_state_name(fcf->state);
253 return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
255 static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
257 #define FCOE_MAX_MODENAME_LEN 20
258 static ssize_t show_ctlr_mode(struct device *dev,
259 struct device_attribute *attr,
262 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
265 name = get_fcoe_ctlr_mode_name(ctlr->mode);
268 return snprintf(buf, FCOE_MAX_MODENAME_LEN,
272 static ssize_t store_ctlr_mode(struct device *dev,
273 struct device_attribute *attr,
274 const char *buf, size_t count)
276 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
277 char mode[FCOE_MAX_MODENAME_LEN + 1];
279 if (count > FCOE_MAX_MODENAME_LEN)
282 strncpy(mode, buf, count);
284 if (mode[count - 1] == '\n')
285 mode[count - 1] = '\0';
289 switch (ctlr->enabled) {
290 case FCOE_CTLR_ENABLED:
291 LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
293 case FCOE_CTLR_DISABLED:
294 if (!ctlr->f->set_fcoe_ctlr_mode) {
295 LIBFCOE_SYSFS_DBG(ctlr,
296 "Mode change not supported by LLD.\n");
300 ctlr->mode = fcoe_parse_mode(mode);
301 if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
302 LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
307 ctlr->f->set_fcoe_ctlr_mode(ctlr);
308 LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
311 case FCOE_CTLR_UNUSED:
313 LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
318 static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
319 show_ctlr_mode, store_ctlr_mode);
321 static ssize_t store_ctlr_enabled(struct device *dev,
322 struct device_attribute *attr,
323 const char *buf, size_t count)
325 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
331 else if (*buf == '0')
336 switch (ctlr->enabled) {
337 case FCOE_CTLR_ENABLED:
340 ctlr->enabled = FCOE_CTLR_DISABLED;
342 case FCOE_CTLR_DISABLED:
345 ctlr->enabled = FCOE_CTLR_ENABLED;
347 case FCOE_CTLR_UNUSED:
351 rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
358 static char *ctlr_enabled_state_names[] = {
359 [ FCOE_CTLR_ENABLED ] = "1",
360 [ FCOE_CTLR_DISABLED ] = "0",
362 fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
363 ctlr_enabled_state_names)
364 #define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
366 static ssize_t show_ctlr_enabled_state(struct device *dev,
367 struct device_attribute *attr,
370 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
373 name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
376 return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
380 static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
381 show_ctlr_enabled_state,
384 static ssize_t store_ctlr_fip_resp(struct device *dev,
385 struct device_attribute *attr,
386 const char *buf, size_t count)
388 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
389 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
391 mutex_lock(&fip->ctlr_mutex);
392 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
395 mutex_unlock(&fip->ctlr_mutex);
400 mutex_unlock(&fip->ctlr_mutex);
404 mutex_unlock(&fip->ctlr_mutex);
408 static ssize_t show_ctlr_fip_resp(struct device *dev,
409 struct device_attribute *attr,
412 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
413 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
415 return sprintf(buf, "%d\n", fip->fip_resp ? 1 : 0);
418 static FCOE_DEVICE_ATTR(ctlr, fip_vlan_responder, S_IRUGO | S_IWUSR,
420 store_ctlr_fip_resp);
423 fcoe_ctlr_var_store(u32 *var, const char *buf, size_t count)
428 err = kstrtoul(buf, 10, &v);
429 if (err || v > UINT_MAX)
437 static ssize_t store_ctlr_r_a_tov(struct device *dev,
438 struct device_attribute *attr,
439 const char *buf, size_t count)
441 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
442 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
444 if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
446 if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
447 return fcoe_ctlr_var_store(&ctlr->lp->r_a_tov, buf, count);
451 static ssize_t show_ctlr_r_a_tov(struct device *dev,
452 struct device_attribute *attr,
455 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
456 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
458 return sprintf(buf, "%d\n", ctlr->lp->r_a_tov);
461 static FCOE_DEVICE_ATTR(ctlr, r_a_tov, S_IRUGO | S_IWUSR,
462 show_ctlr_r_a_tov, store_ctlr_r_a_tov);
464 static ssize_t store_ctlr_e_d_tov(struct device *dev,
465 struct device_attribute *attr,
466 const char *buf, size_t count)
468 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
469 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
471 if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
473 if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
474 return fcoe_ctlr_var_store(&ctlr->lp->e_d_tov, buf, count);
478 static ssize_t show_ctlr_e_d_tov(struct device *dev,
479 struct device_attribute *attr,
482 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
483 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
485 return sprintf(buf, "%d\n", ctlr->lp->e_d_tov);
488 static FCOE_DEVICE_ATTR(ctlr, e_d_tov, S_IRUGO | S_IWUSR,
489 show_ctlr_e_d_tov, store_ctlr_e_d_tov);
492 store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
493 struct device_attribute *attr,
494 const char *buf, size_t count)
496 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
497 struct fcoe_fcf_device *fcf;
501 rc = fcoe_str_to_dev_loss(buf, &val);
505 fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
506 mutex_lock(&ctlr->lock);
507 list_for_each_entry(fcf, &ctlr->fcfs, peers)
508 fcoe_fcf_set_dev_loss_tmo(fcf, val);
509 mutex_unlock(&ctlr->lock);
512 fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
513 static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
514 show_fcoe_ctlr_device_fcf_dev_loss_tmo,
515 store_private_fcoe_ctlr_fcf_dev_loss_tmo);
517 /* Link Error Status Block (LESB) */
518 fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
519 fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
520 fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
521 fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
522 fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
523 fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
525 fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
526 fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
527 fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
528 fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
529 fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
530 fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
531 fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
532 fcoe_fcf_rd_attr(selected, "%u\n", 20);
533 fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
535 fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
537 store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
538 const char *buf, size_t count)
540 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
544 rc = fcoe_str_to_dev_loss(buf, &val);
548 rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
553 static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
554 show_fcoe_fcf_device_dev_loss_tmo,
555 store_fcoe_fcf_dev_loss_tmo);
557 static struct attribute *fcoe_ctlr_lesb_attrs[] = {
558 &device_attr_fcoe_ctlr_link_fail.attr,
559 &device_attr_fcoe_ctlr_vlink_fail.attr,
560 &device_attr_fcoe_ctlr_miss_fka.attr,
561 &device_attr_fcoe_ctlr_symb_err.attr,
562 &device_attr_fcoe_ctlr_err_block.attr,
563 &device_attr_fcoe_ctlr_fcs_error.attr,
567 static struct attribute_group fcoe_ctlr_lesb_attr_group = {
569 .attrs = fcoe_ctlr_lesb_attrs,
572 static struct attribute *fcoe_ctlr_attrs[] = {
573 &device_attr_fcoe_ctlr_fip_vlan_responder.attr,
574 &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
575 &device_attr_fcoe_ctlr_r_a_tov.attr,
576 &device_attr_fcoe_ctlr_e_d_tov.attr,
577 &device_attr_fcoe_ctlr_enabled.attr,
578 &device_attr_fcoe_ctlr_mode.attr,
582 static struct attribute_group fcoe_ctlr_attr_group = {
583 .attrs = fcoe_ctlr_attrs,
586 static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
587 &fcoe_ctlr_attr_group,
588 &fcoe_ctlr_lesb_attr_group,
592 static struct attribute *fcoe_fcf_attrs[] = {
593 &device_attr_fcoe_fcf_fabric_name.attr,
594 &device_attr_fcoe_fcf_switch_name.attr,
595 &device_attr_fcoe_fcf_dev_loss_tmo.attr,
596 &device_attr_fcoe_fcf_fc_map.attr,
597 &device_attr_fcoe_fcf_vfid.attr,
598 &device_attr_fcoe_fcf_mac.attr,
599 &device_attr_fcoe_fcf_priority.attr,
600 &device_attr_fcoe_fcf_fka_period.attr,
601 &device_attr_fcoe_fcf_state.attr,
602 &device_attr_fcoe_fcf_selected.attr,
603 &device_attr_fcoe_fcf_vlan_id.attr,
607 static struct attribute_group fcoe_fcf_attr_group = {
608 .attrs = fcoe_fcf_attrs,
611 static const struct attribute_group *fcoe_fcf_attr_groups[] = {
612 &fcoe_fcf_attr_group,
616 static struct bus_type fcoe_bus_type;
618 static int fcoe_bus_match(struct device *dev,
619 struct device_driver *drv)
621 if (dev->bus == &fcoe_bus_type)
627 * fcoe_ctlr_device_release() - Release the FIP ctlr memory
628 * @dev: Pointer to the FIP ctlr's embedded device
630 * Called when the last FIP ctlr reference is released.
632 static void fcoe_ctlr_device_release(struct device *dev)
634 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
639 * fcoe_fcf_device_release() - Release the FIP fcf memory
640 * @dev: Pointer to the fcf's embedded device
642 * Called when the last FIP fcf reference is released.
644 static void fcoe_fcf_device_release(struct device *dev)
646 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
650 static const struct device_type fcoe_ctlr_device_type = {
652 .groups = fcoe_ctlr_attr_groups,
653 .release = fcoe_ctlr_device_release,
656 static const struct device_type fcoe_fcf_device_type = {
658 .groups = fcoe_fcf_attr_groups,
659 .release = fcoe_fcf_device_release,
662 static ssize_t ctlr_create_store(struct bus_type *bus, const char *buf,
665 return fcoe_ctlr_create_store(bus, buf, count);
667 static BUS_ATTR_WO(ctlr_create);
669 static ssize_t ctlr_destroy_store(struct bus_type *bus, const char *buf,
672 return fcoe_ctlr_destroy_store(bus, buf, count);
674 static BUS_ATTR_WO(ctlr_destroy);
676 static struct attribute *fcoe_bus_attrs[] = {
677 &bus_attr_ctlr_create.attr,
678 &bus_attr_ctlr_destroy.attr,
681 ATTRIBUTE_GROUPS(fcoe_bus);
683 static struct bus_type fcoe_bus_type = {
685 .match = &fcoe_bus_match,
686 .bus_groups = fcoe_bus_groups,
690 * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
691 * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
693 static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
695 if (!fcoe_ctlr_work_q(ctlr)) {
697 "ERROR: FIP Ctlr '%d' attempted to flush work, "
698 "when no workqueue created.\n", ctlr->id);
703 flush_workqueue(fcoe_ctlr_work_q(ctlr));
707 * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
708 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
709 * @work: Work to queue for execution
712 * 1 on success / 0 already queued / < 0 for error
714 static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
715 struct work_struct *work)
717 if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
719 "ERROR: FIP Ctlr '%d' attempted to queue work, "
720 "when no workqueue created.\n", ctlr->id);
726 return queue_work(fcoe_ctlr_work_q(ctlr), work);
730 * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
731 * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
733 static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
735 if (!fcoe_ctlr_devloss_work_q(ctlr)) {
737 "ERROR: FIP Ctlr '%d' attempted to flush work, "
738 "when no workqueue created.\n", ctlr->id);
743 flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
747 * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
748 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
749 * @work: Work to queue for execution
750 * @delay: jiffies to delay the work queuing
753 * 1 on success / 0 already queued / < 0 for error
755 static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
756 struct delayed_work *work,
759 if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
761 "ERROR: FIP Ctlr '%d' attempted to queue work, "
762 "when no workqueue created.\n", ctlr->id);
768 return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
771 static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
772 struct fcoe_fcf_device *old)
774 if (new->switch_name == old->switch_name &&
775 new->fabric_name == old->fabric_name &&
776 new->fc_map == old->fc_map &&
777 ether_addr_equal(new->mac, old->mac))
783 * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
784 * @parent: The parent device to which the fcoe_ctlr instance
786 * @f: The LLD's FCoE sysfs function template pointer
787 * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
789 * This routine allocates a FIP ctlr object with some additional memory
790 * for the LLD. The FIP ctlr is initialized, added to sysfs and then
791 * attributes are added to it.
793 struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
794 struct fcoe_sysfs_function_template *f,
797 struct fcoe_ctlr_device *ctlr;
800 ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
805 ctlr->id = atomic_inc_return(&ctlr_num) - 1;
807 ctlr->mode = FIP_CONN_TYPE_FABRIC;
808 INIT_LIST_HEAD(&ctlr->fcfs);
809 mutex_init(&ctlr->lock);
810 ctlr->dev.parent = parent;
811 ctlr->dev.bus = &fcoe_bus_type;
812 ctlr->dev.type = &fcoe_ctlr_device_type;
814 ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
816 snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
817 "ctlr_wq_%d", ctlr->id);
818 ctlr->work_q = create_singlethread_workqueue(
823 snprintf(ctlr->devloss_work_q_name,
824 sizeof(ctlr->devloss_work_q_name),
825 "ctlr_dl_wq_%d", ctlr->id);
826 ctlr->devloss_work_q = create_singlethread_workqueue(
827 ctlr->devloss_work_q_name);
828 if (!ctlr->devloss_work_q)
831 dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
832 error = device_register(&ctlr->dev);
839 destroy_workqueue(ctlr->devloss_work_q);
840 ctlr->devloss_work_q = NULL;
842 destroy_workqueue(ctlr->work_q);
849 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
852 * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
853 * @ctlr: A pointer to the ctlr to be deleted
855 * Deletes a FIP ctlr and any fcfs attached
856 * to it. Deleting fcfs will cause their childen
857 * to be deleted as well.
859 * The ctlr is detached from sysfs and it's resources
860 * are freed (work q), but the memory is not freed
861 * until its last reference is released.
863 * This routine expects no locks to be held before
866 * TODO: Currently there are no callbacks to clean up LLD data
867 * for a fcoe_fcf_device. LLDs must keep this in mind as they need
868 * to clean up each of their LLD data for all fcoe_fcf_device before
869 * calling fcoe_ctlr_device_delete.
871 void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
873 struct fcoe_fcf_device *fcf, *next;
874 /* Remove any attached fcfs */
875 mutex_lock(&ctlr->lock);
876 list_for_each_entry_safe(fcf, next,
877 &ctlr->fcfs, peers) {
878 list_del(&fcf->peers);
879 fcf->state = FCOE_FCF_STATE_DELETED;
880 fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
882 mutex_unlock(&ctlr->lock);
884 fcoe_ctlr_device_flush_work(ctlr);
886 destroy_workqueue(ctlr->devloss_work_q);
887 ctlr->devloss_work_q = NULL;
888 destroy_workqueue(ctlr->work_q);
891 device_unregister(&ctlr->dev);
893 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
896 * fcoe_fcf_device_final_delete() - Final delete routine
897 * @work: The FIP fcf's embedded work struct
899 * It is expected that the fcf has been removed from
900 * the FIP ctlr's list before calling this routine.
902 static void fcoe_fcf_device_final_delete(struct work_struct *work)
904 struct fcoe_fcf_device *fcf =
905 container_of(work, struct fcoe_fcf_device, delete_work);
906 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
909 * Cancel any outstanding timers. These should really exist
910 * only when rmmod'ing the LLDD and we're asking for
911 * immediate termination of the rports
913 if (!cancel_delayed_work(&fcf->dev_loss_work))
914 fcoe_ctlr_device_flush_devloss(ctlr);
916 device_unregister(&fcf->dev);
920 * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
921 * @work: The FIP fcf's embedded work struct
923 * Removes the fcf from the FIP ctlr's list of fcfs and
924 * queues the final deletion.
926 static void fip_timeout_deleted_fcf(struct work_struct *work)
928 struct fcoe_fcf_device *fcf =
929 container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
930 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
932 mutex_lock(&ctlr->lock);
935 * If the fcf is deleted or reconnected before the timer
936 * fires the devloss queue will be flushed, but the state will
937 * either be CONNECTED or DELETED. If that is the case we
938 * cancel deleting the fcf.
940 if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
943 dev_printk(KERN_ERR, &fcf->dev,
944 "FIP fcf connection time out: removing fcf\n");
946 list_del(&fcf->peers);
947 fcf->state = FCOE_FCF_STATE_DELETED;
948 fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
951 mutex_unlock(&ctlr->lock);
955 * fcoe_fcf_device_delete() - Delete a FIP fcf
956 * @fcf: Pointer to the fcf which is to be deleted
958 * Queues the FIP fcf on the devloss workqueue
960 * Expects the ctlr_attrs mutex to be held for fcf
963 void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
965 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
966 int timeout = fcf->dev_loss_tmo;
968 if (fcf->state != FCOE_FCF_STATE_CONNECTED)
971 fcf->state = FCOE_FCF_STATE_DISCONNECTED;
974 * FCF will only be re-connected by the LLD calling
975 * fcoe_fcf_device_add, and it should be setting up
980 fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
983 EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
986 * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
987 * @ctlr: The fcoe_ctlr_device that will be the fcoe_fcf_device parent
988 * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
990 * Expects to be called with the ctlr->lock held
992 struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
993 struct fcoe_fcf_device *new_fcf)
995 struct fcoe_fcf_device *fcf;
998 list_for_each_entry(fcf, &ctlr->fcfs, peers) {
999 if (fcoe_fcf_device_match(new_fcf, fcf)) {
1000 if (fcf->state == FCOE_FCF_STATE_CONNECTED)
1003 fcf->state = FCOE_FCF_STATE_CONNECTED;
1005 if (!cancel_delayed_work(&fcf->dev_loss_work))
1006 fcoe_ctlr_device_flush_devloss(ctlr);
1012 fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
1016 INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
1017 INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
1019 fcf->dev.parent = &ctlr->dev;
1020 fcf->dev.bus = &fcoe_bus_type;
1021 fcf->dev.type = &fcoe_fcf_device_type;
1022 fcf->id = atomic_inc_return(&fcf_num) - 1;
1023 fcf->state = FCOE_FCF_STATE_UNKNOWN;
1025 fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
1027 dev_set_name(&fcf->dev, "fcf_%d", fcf->id);
1029 fcf->fabric_name = new_fcf->fabric_name;
1030 fcf->switch_name = new_fcf->switch_name;
1031 fcf->fc_map = new_fcf->fc_map;
1032 fcf->vfid = new_fcf->vfid;
1033 memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
1034 fcf->priority = new_fcf->priority;
1035 fcf->fka_period = new_fcf->fka_period;
1036 fcf->selected = new_fcf->selected;
1038 error = device_register(&fcf->dev);
1042 fcf->state = FCOE_FCF_STATE_CONNECTED;
1043 list_add_tail(&fcf->peers, &ctlr->fcfs);
1052 EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
1054 int __init fcoe_sysfs_setup(void)
1058 atomic_set(&ctlr_num, 0);
1059 atomic_set(&fcf_num, 0);
1061 error = bus_register(&fcoe_bus_type);
1068 void __exit fcoe_sysfs_teardown(void)
1070 bus_unregister(&fcoe_bus_type);