xref: /linux/drivers/scsi/scsi_transport_sas.c (revision 88e45067a30918ebb4942120892963e2311330af)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2005-2006 Dell Inc.
4  *
5  * Serial Attached SCSI (SAS) transport class.
6  *
7  * The SAS transport class contains common code to deal with SAS HBAs,
8  * an aproximated representation of SAS topologies in the driver model,
9  * and various sysfs attributes to expose these topologies and management
10  * interfaces to userspace.
11  *
12  * In addition to the basic SCSI core objects this transport class
13  * introduces two additional intermediate objects:  The SAS PHY
14  * as represented by struct sas_phy defines an "outgoing" PHY on
15  * a SAS HBA or Expander, and the SAS remote PHY represented by
16  * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
17  * end device.  Note that this is purely a software concept, the
18  * underlying hardware for a PHY and a remote PHY is the exactly
19  * the same.
20  *
21  * There is no concept of a SAS port in this code, users can see
22  * what PHYs form a wide port based on the port_identifier attribute,
23  * which is the same for all PHYs in a port.
24  */
25 
26 #include <linux/init.h>
27 #include <linux/module.h>
28 #include <linux/jiffies.h>
29 #include <linux/err.h>
30 #include <linux/slab.h>
31 #include <linux/string.h>
32 #include <linux/blkdev.h>
33 #include <linux/bsg.h>
34 
35 #include <scsi/scsi.h>
36 #include <scsi/scsi_cmnd.h>
37 #include <scsi/scsi_device.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_transport.h>
40 #include <scsi/scsi_transport_sas.h>
41 
42 #include "scsi_sas_internal.h"
43 struct sas_host_attrs {
44 	struct list_head rphy_list;
45 	struct mutex lock;
46 	struct request_queue *q;
47 	u32 next_target_id;
48 	u32 next_expander_id;
49 	int next_port_id;
50 };
51 #define to_sas_host_attrs(host)	((struct sas_host_attrs *)(host)->shost_data)
52 
53 
54 /*
55  * Hack to allow attributes of the same name in different objects.
56  */
57 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
58 	struct device_attribute dev_attr_##_prefix##_##_name = \
59 	__ATTR(_name,_mode,_show,_store)
60 
61 
62 /*
63  * Pretty printing helpers
64  */
65 
66 #define sas_bitfield_name_match(title, table)			\
67 static ssize_t							\
68 get_sas_##title##_names(u32 table_key, char *buf)		\
69 {								\
70 	char *prefix = "";					\
71 	ssize_t len = 0;					\
72 	int i;							\
73 								\
74 	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
75 		if (table[i].value & table_key) {		\
76 			len += sprintf(buf + len, "%s%s",	\
77 				prefix, table[i].name);		\
78 			prefix = ", ";				\
79 		}						\
80 	}							\
81 	len += sprintf(buf + len, "\n");			\
82 	return len;						\
83 }
84 
85 #define sas_bitfield_name_set(title, table)			\
86 static ssize_t							\
87 set_sas_##title##_names(u32 *table_key, const char *buf)	\
88 {								\
89 	ssize_t len = 0;					\
90 	int i;							\
91 								\
92 	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
93 		len = strlen(table[i].name);			\
94 		if (strncmp(buf, table[i].name, len) == 0 &&	\
95 		    (buf[len] == '\n' || buf[len] == '\0')) {	\
96 			*table_key = table[i].value;		\
97 			return 0;				\
98 		}						\
99 	}							\
100 	return -EINVAL;						\
101 }
102 
103 #define sas_bitfield_name_search(title, table)			\
104 static ssize_t							\
105 get_sas_##title##_names(u32 table_key, char *buf)		\
106 {								\
107 	ssize_t len = 0;					\
108 	int i;							\
109 								\
110 	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
111 		if (table[i].value == table_key) {		\
112 			len += sprintf(buf + len, "%s",		\
113 				table[i].name);			\
114 			break;					\
115 		}						\
116 	}							\
117 	len += sprintf(buf + len, "\n");			\
118 	return len;						\
119 }
120 
121 static struct {
122 	u32		value;
123 	char		*name;
124 } sas_device_type_names[] = {
125 	{ SAS_PHY_UNUSED,		"unused" },
126 	{ SAS_END_DEVICE,		"end device" },
127 	{ SAS_EDGE_EXPANDER_DEVICE,	"edge expander" },
128 	{ SAS_FANOUT_EXPANDER_DEVICE,	"fanout expander" },
129 };
130 sas_bitfield_name_search(device_type, sas_device_type_names)
131 
132 
133 static struct {
134 	u32		value;
135 	char		*name;
136 } sas_protocol_names[] = {
137 	{ SAS_PROTOCOL_SATA,		"sata" },
138 	{ SAS_PROTOCOL_SMP,		"smp" },
139 	{ SAS_PROTOCOL_STP,		"stp" },
140 	{ SAS_PROTOCOL_SSP,		"ssp" },
141 };
142 sas_bitfield_name_match(protocol, sas_protocol_names)
143 
144 static struct {
145 	u32		value;
146 	char		*name;
147 } sas_linkspeed_names[] = {
148 	{ SAS_LINK_RATE_UNKNOWN,	"Unknown" },
149 	{ SAS_PHY_DISABLED,		"Phy disabled" },
150 	{ SAS_LINK_RATE_FAILED,		"Link Rate failed" },
151 	{ SAS_SATA_SPINUP_HOLD,		"Spin-up hold" },
152 	{ SAS_LINK_RATE_1_5_GBPS,	"1.5 Gbit" },
153 	{ SAS_LINK_RATE_3_0_GBPS,	"3.0 Gbit" },
154 	{ SAS_LINK_RATE_6_0_GBPS,	"6.0 Gbit" },
155 	{ SAS_LINK_RATE_12_0_GBPS,	"12.0 Gbit" },
156 	{ SAS_LINK_RATE_22_5_GBPS,	"22.5 Gbit" },
157 };
sas_bitfield_name_search(linkspeed,sas_linkspeed_names)158 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
159 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
160 
161 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
162 {
163 	struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
164 	struct sas_end_device *rdev;
165 
166 	BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
167 
168 	rdev = rphy_to_end_device(rphy);
169 	return rdev;
170 }
171 
sas_smp_dispatch(struct bsg_job * job)172 static int sas_smp_dispatch(struct bsg_job *job)
173 {
174 	struct Scsi_Host *shost = dev_to_shost(job->dev);
175 	struct sas_rphy *rphy = NULL;
176 
177 	if (!scsi_is_host_device(job->dev))
178 		rphy = dev_to_rphy(job->dev);
179 
180 	if (!job->reply_payload.payload_len) {
181 		dev_warn(job->dev, "space for a smp response is missing\n");
182 		bsg_job_done(job, -EINVAL, 0);
183 		return 0;
184 	}
185 
186 	to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy);
187 	return 0;
188 }
189 
sas_bsg_initialize(struct Scsi_Host * shost,struct sas_rphy * rphy)190 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
191 {
192 	struct request_queue *q;
193 
194 	if (!to_sas_internal(shost->transportt)->f->smp_handler) {
195 		printk("%s can't handle SMP requests\n", shost->hostt->name);
196 		return 0;
197 	}
198 
199 	if (rphy) {
200 		q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev), NULL,
201 				sas_smp_dispatch, NULL, 0);
202 		if (IS_ERR(q))
203 			return PTR_ERR(q);
204 		rphy->q = q;
205 	} else {
206 		char name[20];
207 
208 		snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
209 		q = bsg_setup_queue(&shost->shost_gendev, name, NULL,
210 				sas_smp_dispatch, NULL, 0);
211 		if (IS_ERR(q))
212 			return PTR_ERR(q);
213 		to_sas_host_attrs(shost)->q = q;
214 	}
215 
216 	return 0;
217 }
218 
219 /*
220  * SAS host attributes
221  */
222 
sas_host_setup(struct transport_container * tc,struct device * dev,struct device * cdev)223 static int sas_host_setup(struct transport_container *tc, struct device *dev,
224 			  struct device *cdev)
225 {
226 	struct Scsi_Host *shost = dev_to_shost(dev);
227 	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
228 	struct device *dma_dev = shost->dma_dev;
229 
230 	INIT_LIST_HEAD(&sas_host->rphy_list);
231 	mutex_init(&sas_host->lock);
232 	sas_host->next_target_id = 0;
233 	sas_host->next_expander_id = 0;
234 	sas_host->next_port_id = 0;
235 
236 	if (sas_bsg_initialize(shost, NULL))
237 		dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
238 			   shost->host_no);
239 
240 	if (dma_dev->dma_mask) {
241 		shost->opt_sectors = min_t(unsigned int, shost->max_sectors,
242 				dma_opt_mapping_size(dma_dev) >> SECTOR_SHIFT);
243 	}
244 
245 	return 0;
246 }
247 
sas_host_remove(struct transport_container * tc,struct device * dev,struct device * cdev)248 static int sas_host_remove(struct transport_container *tc, struct device *dev,
249 			   struct device *cdev)
250 {
251 	struct Scsi_Host *shost = dev_to_shost(dev);
252 	struct request_queue *q = to_sas_host_attrs(shost)->q;
253 
254 	bsg_remove_queue(q);
255 	return 0;
256 }
257 
258 static DECLARE_TRANSPORT_CLASS(sas_host_class,
259 		"sas_host", sas_host_setup, sas_host_remove, NULL);
260 
sas_host_match(struct attribute_container * cont,struct device * dev)261 static int sas_host_match(struct attribute_container *cont,
262 			    struct device *dev)
263 {
264 	struct Scsi_Host *shost;
265 	struct sas_internal *i;
266 
267 	if (!scsi_is_host_device(dev))
268 		return 0;
269 	shost = dev_to_shost(dev);
270 
271 	if (!shost->transportt)
272 		return 0;
273 	if (shost->transportt->host_attrs.ac.class !=
274 			&sas_host_class.class)
275 		return 0;
276 
277 	i = to_sas_internal(shost->transportt);
278 	return &i->t.host_attrs.ac == cont;
279 }
280 
do_sas_phy_delete(struct device * dev,void * data)281 static int do_sas_phy_delete(struct device *dev, void *data)
282 {
283 	int pass = (int)(unsigned long)data;
284 
285 	if (pass == 0 && scsi_is_sas_port(dev))
286 		sas_port_delete(dev_to_sas_port(dev));
287 	else if (pass == 1 && scsi_is_sas_phy(dev))
288 		sas_phy_delete(dev_to_phy(dev));
289 	return 0;
290 }
291 
292 /**
293  * sas_remove_children  -  tear down a devices SAS data structures
294  * @dev:	device belonging to the sas object
295  *
296  * Removes all SAS PHYs and remote PHYs for a given object
297  */
sas_remove_children(struct device * dev)298 void sas_remove_children(struct device *dev)
299 {
300 	device_for_each_child(dev, (void *)0, do_sas_phy_delete);
301 	device_for_each_child(dev, (void *)1, do_sas_phy_delete);
302 }
303 EXPORT_SYMBOL(sas_remove_children);
304 
305 /**
306  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
307  * @shost:	Scsi Host that is torn down
308  *
309  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
310  * Scsi_Host as well.
311  *
312  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
313  * already removed.
314  */
sas_remove_host(struct Scsi_Host * shost)315 void sas_remove_host(struct Scsi_Host *shost)
316 {
317 	sas_remove_children(&shost->shost_gendev);
318 	scsi_remove_host(shost);
319 }
320 EXPORT_SYMBOL(sas_remove_host);
321 
322 /**
323  * sas_get_address - return the SAS address of the device
324  * @sdev: scsi device
325  *
326  * Returns the SAS address of the scsi device
327  */
sas_get_address(struct scsi_device * sdev)328 u64 sas_get_address(struct scsi_device *sdev)
329 {
330 	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
331 
332 	return rdev->rphy.identify.sas_address;
333 }
334 EXPORT_SYMBOL(sas_get_address);
335 
336 /**
337  * sas_tlr_supported - checking TLR bit in vpd 0x90
338  * @sdev: scsi device struct
339  *
340  * Check Transport Layer Retries are supported or not.
341  * If vpd page 0x90 is present, TRL is supported.
342  *
343  */
344 unsigned int
sas_tlr_supported(struct scsi_device * sdev)345 sas_tlr_supported(struct scsi_device *sdev)
346 {
347 	const int vpd_len = 32;
348 	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
349 	char *buffer = kzalloc(vpd_len, GFP_KERNEL);
350 	int ret = 0;
351 
352 	if (!buffer)
353 		goto out;
354 
355 	if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
356 		goto out;
357 
358 	/*
359 	 * Magic numbers: the VPD Protocol page (0x90)
360 	 * has a 4 byte header and then one entry per device port
361 	 * the TLR bit is at offset 8 on each port entry
362 	 * if we take the first port, that's at total offset 12
363 	 */
364 	ret = buffer[12] & 0x01;
365 
366  out:
367 	kfree(buffer);
368 	rdev->tlr_supported = ret;
369 	return ret;
370 
371 }
372 EXPORT_SYMBOL_GPL(sas_tlr_supported);
373 
374 /**
375  * sas_disable_tlr - setting TLR flags
376  * @sdev: scsi device struct
377  *
378  * Seting tlr_enabled flag to 0.
379  *
380  */
381 void
sas_disable_tlr(struct scsi_device * sdev)382 sas_disable_tlr(struct scsi_device *sdev)
383 {
384 	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
385 
386 	rdev->tlr_enabled = 0;
387 }
388 EXPORT_SYMBOL_GPL(sas_disable_tlr);
389 
390 /**
391  * sas_enable_tlr - setting TLR flags
392  * @sdev: scsi device struct
393  *
394  * Seting tlr_enabled flag 1.
395  *
396  */
sas_enable_tlr(struct scsi_device * sdev)397 void sas_enable_tlr(struct scsi_device *sdev)
398 {
399 	unsigned int tlr_supported = 0;
400 	tlr_supported  = sas_tlr_supported(sdev);
401 
402 	if (tlr_supported) {
403 		struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
404 
405 		rdev->tlr_enabled = 1;
406 	}
407 
408 	return;
409 }
410 EXPORT_SYMBOL_GPL(sas_enable_tlr);
411 
sas_is_tlr_enabled(struct scsi_device * sdev)412 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
413 {
414 	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
415 	return rdev->tlr_enabled;
416 }
417 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
418 
419 /**
420  * sas_ata_ncq_prio_supported - Check for ATA NCQ command priority support
421  * @sdev: SCSI device
422  *
423  * Check if an ATA device supports NCQ priority using VPD page 89h (ATA
424  * Information). Since this VPD page is implemented only for ATA devices,
425  * this function always returns false for SCSI devices.
426  */
sas_ata_ncq_prio_supported(struct scsi_device * sdev)427 bool sas_ata_ncq_prio_supported(struct scsi_device *sdev)
428 {
429 	struct scsi_vpd *vpd;
430 	bool ncq_prio_supported = false;
431 
432 	rcu_read_lock();
433 	vpd = rcu_dereference(sdev->vpd_pg89);
434 	if (vpd && vpd->len >= 214)
435 		ncq_prio_supported = (vpd->data[213] >> 4) & 1;
436 	rcu_read_unlock();
437 
438 	return ncq_prio_supported;
439 }
440 EXPORT_SYMBOL_GPL(sas_ata_ncq_prio_supported);
441 
442 /*
443  * SAS Phy attributes
444  */
445 
446 #define sas_phy_show_simple(field, name, format_string, cast)		\
447 static ssize_t								\
448 show_sas_phy_##name(struct device *dev, 				\
449 		    struct device_attribute *attr, char *buf)		\
450 {									\
451 	struct sas_phy *phy = transport_class_to_phy(dev);		\
452 									\
453 	return snprintf(buf, 20, format_string, cast phy->field);	\
454 }
455 
456 #define sas_phy_simple_attr(field, name, format_string, type)		\
457 	sas_phy_show_simple(field, name, format_string, (type))	\
458 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
459 
460 #define sas_phy_show_protocol(field, name)				\
461 static ssize_t								\
462 show_sas_phy_##name(struct device *dev, 				\
463 		    struct device_attribute *attr, char *buf)		\
464 {									\
465 	struct sas_phy *phy = transport_class_to_phy(dev);		\
466 									\
467 	if (!phy->field)						\
468 		return snprintf(buf, 20, "none\n");			\
469 	return get_sas_protocol_names(phy->field, buf);		\
470 }
471 
472 #define sas_phy_protocol_attr(field, name)				\
473 	sas_phy_show_protocol(field, name)				\
474 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
475 
476 #define sas_phy_show_linkspeed(field)					\
477 static ssize_t								\
478 show_sas_phy_##field(struct device *dev, 				\
479 		     struct device_attribute *attr, char *buf)		\
480 {									\
481 	struct sas_phy *phy = transport_class_to_phy(dev);		\
482 									\
483 	return get_sas_linkspeed_names(phy->field, buf);		\
484 }
485 
486 /* Fudge to tell if we're minimum or maximum */
487 #define sas_phy_store_linkspeed(field)					\
488 static ssize_t								\
489 store_sas_phy_##field(struct device *dev, 				\
490 		      struct device_attribute *attr, 			\
491 		      const char *buf,	size_t count)			\
492 {									\
493 	struct sas_phy *phy = transport_class_to_phy(dev);		\
494 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);	\
495 	struct sas_internal *i = to_sas_internal(shost->transportt);	\
496 	u32 value;							\
497 	struct sas_phy_linkrates rates = {0};				\
498 	int error;							\
499 									\
500 	error = set_sas_linkspeed_names(&value, buf);			\
501 	if (error)							\
502 		return error;						\
503 	rates.field = value;						\
504 	error = i->f->set_phy_speed(phy, &rates);			\
505 									\
506 	return error ? error : count;					\
507 }
508 
509 #define sas_phy_linkspeed_rw_attr(field)				\
510 	sas_phy_show_linkspeed(field)					\
511 	sas_phy_store_linkspeed(field)					\
512 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,		\
513 	store_sas_phy_##field)
514 
515 #define sas_phy_linkspeed_attr(field)					\
516 	sas_phy_show_linkspeed(field)					\
517 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
518 
519 
520 #define sas_phy_show_linkerror(field)					\
521 static ssize_t								\
522 show_sas_phy_##field(struct device *dev, 				\
523 		     struct device_attribute *attr, char *buf)		\
524 {									\
525 	struct sas_phy *phy = transport_class_to_phy(dev);		\
526 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);	\
527 	struct sas_internal *i = to_sas_internal(shost->transportt);	\
528 	int error;							\
529 									\
530 	error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;	\
531 	if (error)							\
532 		return error;						\
533 	return snprintf(buf, 20, "%u\n", phy->field);			\
534 }
535 
536 #define sas_phy_linkerror_attr(field)					\
537 	sas_phy_show_linkerror(field)					\
538 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
539 
540 
541 static ssize_t
show_sas_device_type(struct device * dev,struct device_attribute * attr,char * buf)542 show_sas_device_type(struct device *dev,
543 		     struct device_attribute *attr, char *buf)
544 {
545 	struct sas_phy *phy = transport_class_to_phy(dev);
546 
547 	if (!phy->identify.device_type)
548 		return snprintf(buf, 20, "none\n");
549 	return get_sas_device_type_names(phy->identify.device_type, buf);
550 }
551 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
552 
do_sas_phy_enable(struct device * dev,size_t count,int enable)553 static ssize_t do_sas_phy_enable(struct device *dev,
554 		size_t count, int enable)
555 {
556 	struct sas_phy *phy = transport_class_to_phy(dev);
557 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
558 	struct sas_internal *i = to_sas_internal(shost->transportt);
559 	int error;
560 
561 	error = i->f->phy_enable(phy, enable);
562 	if (error)
563 		return error;
564 	phy->enabled = enable;
565 	return count;
566 };
567 
568 static ssize_t
store_sas_phy_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)569 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
570 		     const char *buf, size_t count)
571 {
572 	if (count < 1)
573 		return -EINVAL;
574 
575 	switch (buf[0]) {
576 	case '0':
577 		do_sas_phy_enable(dev, count, 0);
578 		break;
579 	case '1':
580 		do_sas_phy_enable(dev, count, 1);
581 		break;
582 	default:
583 		return -EINVAL;
584 	}
585 
586 	return count;
587 }
588 
589 static ssize_t
show_sas_phy_enable(struct device * dev,struct device_attribute * attr,char * buf)590 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
591 		    char *buf)
592 {
593 	struct sas_phy *phy = transport_class_to_phy(dev);
594 
595 	return snprintf(buf, 20, "%d\n", phy->enabled);
596 }
597 
598 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
599 			 store_sas_phy_enable);
600 
601 static ssize_t
do_sas_phy_reset(struct device * dev,size_t count,int hard_reset)602 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
603 {
604 	struct sas_phy *phy = transport_class_to_phy(dev);
605 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
606 	struct sas_internal *i = to_sas_internal(shost->transportt);
607 	int error;
608 
609 	error = i->f->phy_reset(phy, hard_reset);
610 	if (error)
611 		return error;
612 	phy->enabled = 1;
613 	return count;
614 };
615 
616 static ssize_t
store_sas_link_reset(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)617 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
618 		     const char *buf, size_t count)
619 {
620 	return do_sas_phy_reset(dev, count, 0);
621 }
622 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
623 
624 static ssize_t
store_sas_hard_reset(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)625 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
626 		     const char *buf, size_t count)
627 {
628 	return do_sas_phy_reset(dev, count, 1);
629 }
630 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
631 
632 sas_phy_protocol_attr(identify.initiator_port_protocols,
633 		initiator_port_protocols);
634 sas_phy_protocol_attr(identify.target_port_protocols,
635 		target_port_protocols);
636 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
637 		unsigned long long);
638 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
639 sas_phy_linkspeed_attr(negotiated_linkrate);
640 sas_phy_linkspeed_attr(minimum_linkrate_hw);
641 sas_phy_linkspeed_rw_attr(minimum_linkrate);
642 sas_phy_linkspeed_attr(maximum_linkrate_hw);
643 sas_phy_linkspeed_rw_attr(maximum_linkrate);
644 sas_phy_linkerror_attr(invalid_dword_count);
645 sas_phy_linkerror_attr(running_disparity_error_count);
646 sas_phy_linkerror_attr(loss_of_dword_sync_count);
647 sas_phy_linkerror_attr(phy_reset_problem_count);
648 
sas_phy_setup(struct transport_container * tc,struct device * dev,struct device * cdev)649 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
650 			 struct device *cdev)
651 {
652 	struct sas_phy *phy = dev_to_phy(dev);
653 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
654 	struct sas_internal *i = to_sas_internal(shost->transportt);
655 
656 	if (i->f->phy_setup)
657 		i->f->phy_setup(phy);
658 
659 	return 0;
660 }
661 
662 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
663 		"sas_phy", sas_phy_setup, NULL, NULL);
664 
sas_phy_match(struct attribute_container * cont,struct device * dev)665 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
666 {
667 	struct Scsi_Host *shost;
668 	struct sas_internal *i;
669 
670 	if (!scsi_is_sas_phy(dev))
671 		return 0;
672 	shost = dev_to_shost(dev->parent);
673 
674 	if (!shost->transportt)
675 		return 0;
676 	if (shost->transportt->host_attrs.ac.class !=
677 			&sas_host_class.class)
678 		return 0;
679 
680 	i = to_sas_internal(shost->transportt);
681 	return &i->phy_attr_cont.ac == cont;
682 }
683 
sas_phy_release(struct device * dev)684 static void sas_phy_release(struct device *dev)
685 {
686 	struct sas_phy *phy = dev_to_phy(dev);
687 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
688 	struct sas_internal *i = to_sas_internal(shost->transportt);
689 
690 	if (i->f->phy_release)
691 		i->f->phy_release(phy);
692 	put_device(dev->parent);
693 	kfree(phy);
694 }
695 
696 /**
697  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
698  * @parent:	Parent device
699  * @number:	Phy index
700  *
701  * Allocates an SAS PHY structure.  It will be added in the device tree
702  * below the device specified by @parent, which has to be either a Scsi_Host
703  * or sas_rphy.
704  *
705  * Returns:
706  *	SAS PHY allocated or %NULL if the allocation failed.
707  */
sas_phy_alloc(struct device * parent,int number)708 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
709 {
710 	struct Scsi_Host *shost = dev_to_shost(parent);
711 	struct sas_phy *phy;
712 
713 	phy = kzalloc(sizeof(*phy), GFP_KERNEL);
714 	if (!phy)
715 		return NULL;
716 
717 	phy->number = number;
718 	phy->enabled = 1;
719 
720 	device_initialize(&phy->dev);
721 	phy->dev.parent = get_device(parent);
722 	phy->dev.release = sas_phy_release;
723 	INIT_LIST_HEAD(&phy->port_siblings);
724 	if (scsi_is_sas_expander_device(parent)) {
725 		struct sas_rphy *rphy = dev_to_rphy(parent);
726 		dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
727 			rphy->scsi_target_id, number);
728 	} else
729 		dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
730 
731 	transport_setup_device(&phy->dev);
732 
733 	return phy;
734 }
735 EXPORT_SYMBOL(sas_phy_alloc);
736 
737 /**
738  * sas_phy_add  -  add a SAS PHY to the device hierarchy
739  * @phy:	The PHY to be added
740  *
741  * Publishes a SAS PHY to the rest of the system.
742  */
sas_phy_add(struct sas_phy * phy)743 int sas_phy_add(struct sas_phy *phy)
744 {
745 	int error;
746 
747 	error = device_add(&phy->dev);
748 	if (error)
749 		return error;
750 
751 	error = transport_add_device(&phy->dev);
752 	if (error) {
753 		device_del(&phy->dev);
754 		return error;
755 	}
756 	transport_configure_device(&phy->dev);
757 
758 	return 0;
759 }
760 EXPORT_SYMBOL(sas_phy_add);
761 
762 /**
763  * sas_phy_free  -  free a SAS PHY
764  * @phy:	SAS PHY to free
765  *
766  * Frees the specified SAS PHY.
767  *
768  * Note:
769  *   This function must only be called on a PHY that has not
770  *   successfully been added using sas_phy_add().
771  */
sas_phy_free(struct sas_phy * phy)772 void sas_phy_free(struct sas_phy *phy)
773 {
774 	transport_destroy_device(&phy->dev);
775 	put_device(&phy->dev);
776 }
777 EXPORT_SYMBOL(sas_phy_free);
778 
779 /**
780  * sas_phy_delete  -  remove SAS PHY
781  * @phy:	SAS PHY to remove
782  *
783  * Removes the specified SAS PHY.  If the SAS PHY has an
784  * associated remote PHY it is removed before.
785  */
786 void
sas_phy_delete(struct sas_phy * phy)787 sas_phy_delete(struct sas_phy *phy)
788 {
789 	struct device *dev = &phy->dev;
790 
791 	/* this happens if the phy is still part of a port when deleted */
792 	BUG_ON(!list_empty(&phy->port_siblings));
793 
794 	transport_remove_device(dev);
795 	device_del(dev);
796 	transport_destroy_device(dev);
797 	put_device(dev);
798 }
799 EXPORT_SYMBOL(sas_phy_delete);
800 
801 /**
802  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
803  * @dev:	device to check
804  *
805  * Returns:
806  *	%1 if the device represents a SAS PHY, %0 else
807  */
scsi_is_sas_phy(const struct device * dev)808 int scsi_is_sas_phy(const struct device *dev)
809 {
810 	return dev->release == sas_phy_release;
811 }
812 EXPORT_SYMBOL(scsi_is_sas_phy);
813 
814 /*
815  * SAS Port attributes
816  */
817 #define sas_port_show_simple(field, name, format_string, cast)		\
818 static ssize_t								\
819 show_sas_port_##name(struct device *dev, 				\
820 		     struct device_attribute *attr, char *buf)		\
821 {									\
822 	struct sas_port *port = transport_class_to_sas_port(dev);	\
823 									\
824 	return snprintf(buf, 20, format_string, cast port->field);	\
825 }
826 
827 #define sas_port_simple_attr(field, name, format_string, type)		\
828 	sas_port_show_simple(field, name, format_string, (type))	\
829 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
830 
831 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
832 
833 static DECLARE_TRANSPORT_CLASS(sas_port_class,
834 			       "sas_port", NULL, NULL, NULL);
835 
sas_port_match(struct attribute_container * cont,struct device * dev)836 static int sas_port_match(struct attribute_container *cont, struct device *dev)
837 {
838 	struct Scsi_Host *shost;
839 	struct sas_internal *i;
840 
841 	if (!scsi_is_sas_port(dev))
842 		return 0;
843 	shost = dev_to_shost(dev->parent);
844 
845 	if (!shost->transportt)
846 		return 0;
847 	if (shost->transportt->host_attrs.ac.class !=
848 			&sas_host_class.class)
849 		return 0;
850 
851 	i = to_sas_internal(shost->transportt);
852 	return &i->port_attr_cont.ac == cont;
853 }
854 
855 
sas_port_release(struct device * dev)856 static void sas_port_release(struct device *dev)
857 {
858 	struct sas_port *port = dev_to_sas_port(dev);
859 
860 	BUG_ON(!list_empty(&port->phy_list));
861 
862 	put_device(dev->parent);
863 	kfree(port);
864 }
865 
sas_port_create_link(struct sas_port * port,struct sas_phy * phy)866 static void sas_port_create_link(struct sas_port *port,
867 				 struct sas_phy *phy)
868 {
869 	int res;
870 
871 	res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
872 				dev_name(&phy->dev));
873 	if (res)
874 		goto err;
875 	res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
876 	if (res)
877 		goto err;
878 	return;
879 err:
880 	printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
881 	       __func__, res);
882 }
883 
sas_port_delete_link(struct sas_port * port,struct sas_phy * phy)884 static void sas_port_delete_link(struct sas_port *port,
885 				 struct sas_phy *phy)
886 {
887 	sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
888 	sysfs_remove_link(&phy->dev.kobj, "port");
889 }
890 
891 /**
892  * sas_port_alloc - allocate and initialize a SAS port structure
893  *
894  * @parent:	parent device
895  * @port_id:	port number
896  *
897  * Allocates a SAS port structure.  It will be added to the device tree
898  * below the device specified by @parent which must be either a Scsi_Host
899  * or a sas_expander_device.
900  *
901  * Returns: %NULL on error
902  */
sas_port_alloc(struct device * parent,int port_id)903 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
904 {
905 	struct Scsi_Host *shost = dev_to_shost(parent);
906 	struct sas_port *port;
907 
908 	port = kzalloc(sizeof(*port), GFP_KERNEL);
909 	if (!port)
910 		return NULL;
911 
912 	port->port_identifier = port_id;
913 
914 	device_initialize(&port->dev);
915 
916 	port->dev.parent = get_device(parent);
917 	port->dev.release = sas_port_release;
918 
919 	mutex_init(&port->phy_list_mutex);
920 	INIT_LIST_HEAD(&port->phy_list);
921 
922 	if (scsi_is_sas_expander_device(parent)) {
923 		struct sas_rphy *rphy = dev_to_rphy(parent);
924 		dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
925 			     rphy->scsi_target_id, port->port_identifier);
926 	} else
927 		dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
928 			     port->port_identifier);
929 
930 	transport_setup_device(&port->dev);
931 
932 	return port;
933 }
934 EXPORT_SYMBOL(sas_port_alloc);
935 
936 /**
937  * sas_port_alloc_num - allocate and initialize a SAS port structure
938  *
939  * @parent:	parent device
940  *
941  * Allocates a SAS port structure and a number to go with it.  This
942  * interface is really for adapters where the port number has no
943  * meansing, so the sas class should manage them.  It will be added to
944  * the device tree below the device specified by @parent which must be
945  * either a Scsi_Host or a sas_expander_device.
946  *
947  * Returns: %NULL on error
948  */
sas_port_alloc_num(struct device * parent)949 struct sas_port *sas_port_alloc_num(struct device *parent)
950 {
951 	int index;
952 	struct Scsi_Host *shost = dev_to_shost(parent);
953 	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
954 
955 	/* FIXME: use idr for this eventually */
956 	mutex_lock(&sas_host->lock);
957 	if (scsi_is_sas_expander_device(parent)) {
958 		struct sas_rphy *rphy = dev_to_rphy(parent);
959 		struct sas_expander_device *exp = rphy_to_expander_device(rphy);
960 
961 		index = exp->next_port_id++;
962 	} else
963 		index = sas_host->next_port_id++;
964 	mutex_unlock(&sas_host->lock);
965 	return sas_port_alloc(parent, index);
966 }
967 EXPORT_SYMBOL(sas_port_alloc_num);
968 
969 /**
970  * sas_port_add - add a SAS port to the device hierarchy
971  * @port:	port to be added
972  *
973  * publishes a port to the rest of the system
974  */
sas_port_add(struct sas_port * port)975 int sas_port_add(struct sas_port *port)
976 {
977 	int error;
978 
979 	/* No phys should be added until this is made visible */
980 	BUG_ON(!list_empty(&port->phy_list));
981 
982 	error = device_add(&port->dev);
983 
984 	if (error)
985 		return error;
986 
987 	transport_add_device(&port->dev);
988 	transport_configure_device(&port->dev);
989 
990 	return 0;
991 }
992 EXPORT_SYMBOL(sas_port_add);
993 
994 /**
995  * sas_port_free  -  free a SAS PORT
996  * @port:	SAS PORT to free
997  *
998  * Frees the specified SAS PORT.
999  *
1000  * Note:
1001  *   This function must only be called on a PORT that has not
1002  *   successfully been added using sas_port_add().
1003  */
sas_port_free(struct sas_port * port)1004 void sas_port_free(struct sas_port *port)
1005 {
1006 	transport_destroy_device(&port->dev);
1007 	put_device(&port->dev);
1008 }
1009 EXPORT_SYMBOL(sas_port_free);
1010 
1011 /**
1012  * sas_port_delete  -  remove SAS PORT
1013  * @port:	SAS PORT to remove
1014  *
1015  * Removes the specified SAS PORT.  If the SAS PORT has an
1016  * associated phys, unlink them from the port as well.
1017  */
sas_port_delete(struct sas_port * port)1018 void sas_port_delete(struct sas_port *port)
1019 {
1020 	struct device *dev = &port->dev;
1021 	struct sas_phy *phy, *tmp_phy;
1022 
1023 	if (port->rphy) {
1024 		sas_rphy_delete(port->rphy);
1025 		port->rphy = NULL;
1026 	}
1027 
1028 	mutex_lock(&port->phy_list_mutex);
1029 	list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1030 				 port_siblings) {
1031 		sas_port_delete_link(port, phy);
1032 		list_del_init(&phy->port_siblings);
1033 	}
1034 	mutex_unlock(&port->phy_list_mutex);
1035 
1036 	if (port->is_backlink) {
1037 		struct device *parent = port->dev.parent;
1038 
1039 		sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1040 		port->is_backlink = 0;
1041 	}
1042 
1043 	transport_remove_device(dev);
1044 	device_del(dev);
1045 	transport_destroy_device(dev);
1046 	put_device(dev);
1047 }
1048 EXPORT_SYMBOL(sas_port_delete);
1049 
1050 /**
1051  * scsi_is_sas_port -  check if a struct device represents a SAS port
1052  * @dev:	device to check
1053  *
1054  * Returns:
1055  *	%1 if the device represents a SAS Port, %0 else
1056  */
scsi_is_sas_port(const struct device * dev)1057 int scsi_is_sas_port(const struct device *dev)
1058 {
1059 	return dev->release == sas_port_release;
1060 }
1061 EXPORT_SYMBOL(scsi_is_sas_port);
1062 
1063 /**
1064  * sas_port_get_phy - try to take a reference on a port member
1065  * @port: port to check
1066  */
sas_port_get_phy(struct sas_port * port)1067 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1068 {
1069 	struct sas_phy *phy;
1070 
1071 	mutex_lock(&port->phy_list_mutex);
1072 	if (list_empty(&port->phy_list))
1073 		phy = NULL;
1074 	else {
1075 		struct list_head *ent = port->phy_list.next;
1076 
1077 		phy = list_entry(ent, typeof(*phy), port_siblings);
1078 		get_device(&phy->dev);
1079 	}
1080 	mutex_unlock(&port->phy_list_mutex);
1081 
1082 	return phy;
1083 }
1084 EXPORT_SYMBOL(sas_port_get_phy);
1085 
1086 /**
1087  * sas_port_add_phy - add another phy to a port to form a wide port
1088  * @port:	port to add the phy to
1089  * @phy:	phy to add
1090  *
1091  * When a port is initially created, it is empty (has no phys).  All
1092  * ports must have at least one phy to operated, and all wide ports
1093  * must have at least two.  The current code makes no difference
1094  * between ports and wide ports, but the only object that can be
1095  * connected to a remote device is a port, so ports must be formed on
1096  * all devices with phys if they're connected to anything.
1097  */
sas_port_add_phy(struct sas_port * port,struct sas_phy * phy)1098 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1099 {
1100 	mutex_lock(&port->phy_list_mutex);
1101 	if (unlikely(!list_empty(&phy->port_siblings))) {
1102 		/* make sure we're already on this port */
1103 		struct sas_phy *tmp;
1104 
1105 		list_for_each_entry(tmp, &port->phy_list, port_siblings)
1106 			if (tmp == phy)
1107 				break;
1108 		/* If this trips, you added a phy that was already
1109 		 * part of a different port */
1110 		if (unlikely(tmp != phy)) {
1111 			dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1112 				   dev_name(&phy->dev));
1113 			BUG();
1114 		}
1115 	} else {
1116 		sas_port_create_link(port, phy);
1117 		list_add_tail(&phy->port_siblings, &port->phy_list);
1118 		port->num_phys++;
1119 	}
1120 	mutex_unlock(&port->phy_list_mutex);
1121 }
1122 EXPORT_SYMBOL(sas_port_add_phy);
1123 
1124 /**
1125  * sas_port_delete_phy - remove a phy from a port or wide port
1126  * @port:	port to remove the phy from
1127  * @phy:	phy to remove
1128  *
1129  * This operation is used for tearing down ports again.  It must be
1130  * done to every port or wide port before calling sas_port_delete.
1131  */
sas_port_delete_phy(struct sas_port * port,struct sas_phy * phy)1132 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1133 {
1134 	mutex_lock(&port->phy_list_mutex);
1135 	sas_port_delete_link(port, phy);
1136 	list_del_init(&phy->port_siblings);
1137 	port->num_phys--;
1138 	mutex_unlock(&port->phy_list_mutex);
1139 }
1140 EXPORT_SYMBOL(sas_port_delete_phy);
1141 
sas_port_mark_backlink(struct sas_port * port)1142 void sas_port_mark_backlink(struct sas_port *port)
1143 {
1144 	int res;
1145 	struct device *parent = port->dev.parent->parent->parent;
1146 
1147 	if (port->is_backlink)
1148 		return;
1149 	port->is_backlink = 1;
1150 	res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1151 				dev_name(parent));
1152 	if (res)
1153 		goto err;
1154 	return;
1155 err:
1156 	printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1157 	       __func__, res);
1158 
1159 }
1160 EXPORT_SYMBOL(sas_port_mark_backlink);
1161 
1162 /*
1163  * SAS remote PHY attributes.
1164  */
1165 
1166 #define sas_rphy_show_simple(field, name, format_string, cast)		\
1167 static ssize_t								\
1168 show_sas_rphy_##name(struct device *dev, 				\
1169 		     struct device_attribute *attr, char *buf)		\
1170 {									\
1171 	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1172 									\
1173 	return snprintf(buf, 20, format_string, cast rphy->field);	\
1174 }
1175 
1176 #define sas_rphy_simple_attr(field, name, format_string, type)		\
1177 	sas_rphy_show_simple(field, name, format_string, (type))	\
1178 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, 			\
1179 		show_sas_rphy_##name, NULL)
1180 
1181 #define sas_rphy_show_protocol(field, name)				\
1182 static ssize_t								\
1183 show_sas_rphy_##name(struct device *dev, 				\
1184 		     struct device_attribute *attr, char *buf)		\
1185 {									\
1186 	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1187 									\
1188 	if (!rphy->field)					\
1189 		return snprintf(buf, 20, "none\n");			\
1190 	return get_sas_protocol_names(rphy->field, buf);	\
1191 }
1192 
1193 #define sas_rphy_protocol_attr(field, name)				\
1194 	sas_rphy_show_protocol(field, name)				\
1195 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,			\
1196 		show_sas_rphy_##name, NULL)
1197 
1198 static ssize_t
show_sas_rphy_device_type(struct device * dev,struct device_attribute * attr,char * buf)1199 show_sas_rphy_device_type(struct device *dev,
1200 			  struct device_attribute *attr, char *buf)
1201 {
1202 	struct sas_rphy *rphy = transport_class_to_rphy(dev);
1203 
1204 	if (!rphy->identify.device_type)
1205 		return snprintf(buf, 20, "none\n");
1206 	return get_sas_device_type_names(
1207 			rphy->identify.device_type, buf);
1208 }
1209 
1210 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1211 		show_sas_rphy_device_type, NULL);
1212 
1213 static ssize_t
show_sas_rphy_enclosure_identifier(struct device * dev,struct device_attribute * attr,char * buf)1214 show_sas_rphy_enclosure_identifier(struct device *dev,
1215 				   struct device_attribute *attr, char *buf)
1216 {
1217 	struct sas_rphy *rphy = transport_class_to_rphy(dev);
1218 	struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1219 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1220 	struct sas_internal *i = to_sas_internal(shost->transportt);
1221 	u64 identifier;
1222 	int error;
1223 
1224 	error = i->f->get_enclosure_identifier(rphy, &identifier);
1225 	if (error)
1226 		return error;
1227 	return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1228 }
1229 
1230 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1231 		show_sas_rphy_enclosure_identifier, NULL);
1232 
1233 static ssize_t
show_sas_rphy_bay_identifier(struct device * dev,struct device_attribute * attr,char * buf)1234 show_sas_rphy_bay_identifier(struct device *dev,
1235 			     struct device_attribute *attr, char *buf)
1236 {
1237 	struct sas_rphy *rphy = transport_class_to_rphy(dev);
1238 	struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1239 	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1240 	struct sas_internal *i = to_sas_internal(shost->transportt);
1241 	int val;
1242 
1243 	val = i->f->get_bay_identifier(rphy);
1244 	if (val < 0)
1245 		return val;
1246 	return sprintf(buf, "%d\n", val);
1247 }
1248 
1249 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1250 		show_sas_rphy_bay_identifier, NULL);
1251 
1252 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1253 		initiator_port_protocols);
1254 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1255 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1256 		unsigned long long);
1257 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1258 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1259 
1260 /* only need 8 bytes of data plus header (4 or 8) */
1261 #define BUF_SIZE 64
1262 
sas_read_port_mode_page(struct scsi_device * sdev)1263 int sas_read_port_mode_page(struct scsi_device *sdev)
1264 {
1265 	char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1266 	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1267 	struct scsi_mode_data mode_data;
1268 	int error;
1269 
1270 	if (!buffer)
1271 		return -ENOMEM;
1272 
1273 	error = scsi_mode_sense(sdev, 1, 0x19, 0, buffer, BUF_SIZE, 30*HZ, 3,
1274 				&mode_data, NULL);
1275 
1276 	if (error)
1277 		goto out;
1278 
1279 	msdata = buffer +  mode_data.header_length +
1280 		mode_data.block_descriptor_length;
1281 
1282 	if (msdata - buffer > BUF_SIZE - 8)
1283 		goto out;
1284 
1285 	error = 0;
1286 
1287 	rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1288 	rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1289 	rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1290 
1291  out:
1292 	kfree(buffer);
1293 	return error;
1294 }
1295 EXPORT_SYMBOL(sas_read_port_mode_page);
1296 
1297 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1298 			       "sas_end_device", NULL, NULL, NULL);
1299 
1300 #define sas_end_dev_show_simple(field, name, format_string, cast)	\
1301 static ssize_t								\
1302 show_sas_end_dev_##name(struct device *dev, 				\
1303 			struct device_attribute *attr, char *buf)	\
1304 {									\
1305 	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1306 	struct sas_end_device *rdev = rphy_to_end_device(rphy);		\
1307 									\
1308 	return snprintf(buf, 20, format_string, cast rdev->field);	\
1309 }
1310 
1311 #define sas_end_dev_simple_attr(field, name, format_string, type)	\
1312 	sas_end_dev_show_simple(field, name, format_string, (type))	\
1313 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, 			\
1314 		show_sas_end_dev_##name, NULL)
1315 
1316 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1317 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1318 			"%d\n", int);
1319 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1320 			"%d\n", int);
1321 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1322 			"%d\n", int);
1323 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1324 			"%d\n", int);
1325 
1326 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1327 			       "sas_expander", NULL, NULL, NULL);
1328 
1329 #define sas_expander_show_simple(field, name, format_string, cast)	\
1330 static ssize_t								\
1331 show_sas_expander_##name(struct device *dev, 				\
1332 			 struct device_attribute *attr, char *buf)	\
1333 {									\
1334 	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1335 	struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1336 									\
1337 	return snprintf(buf, 20, format_string, cast edev->field);	\
1338 }
1339 
1340 #define sas_expander_simple_attr(field, name, format_string, type)	\
1341 	sas_expander_show_simple(field, name, format_string, (type))	\
1342 static SAS_DEVICE_ATTR(expander, name, S_IRUGO, 			\
1343 		show_sas_expander_##name, NULL)
1344 
1345 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1346 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1347 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1348 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1349 			 "%s\n", char *);
1350 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1351 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1352 			 unsigned int);
1353 sas_expander_simple_attr(level, level, "%d\n", int);
1354 
1355 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1356 		"sas_device", NULL, NULL, NULL);
1357 
sas_rphy_match(struct attribute_container * cont,struct device * dev)1358 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1359 {
1360 	struct Scsi_Host *shost;
1361 	struct sas_internal *i;
1362 
1363 	if (!scsi_is_sas_rphy(dev))
1364 		return 0;
1365 	shost = dev_to_shost(dev->parent->parent);
1366 
1367 	if (!shost->transportt)
1368 		return 0;
1369 	if (shost->transportt->host_attrs.ac.class !=
1370 			&sas_host_class.class)
1371 		return 0;
1372 
1373 	i = to_sas_internal(shost->transportt);
1374 	return &i->rphy_attr_cont.ac == cont;
1375 }
1376 
sas_end_dev_match(struct attribute_container * cont,struct device * dev)1377 static int sas_end_dev_match(struct attribute_container *cont,
1378 			     struct device *dev)
1379 {
1380 	struct Scsi_Host *shost;
1381 	struct sas_internal *i;
1382 	struct sas_rphy *rphy;
1383 
1384 	if (!scsi_is_sas_rphy(dev))
1385 		return 0;
1386 	shost = dev_to_shost(dev->parent->parent);
1387 	rphy = dev_to_rphy(dev);
1388 
1389 	if (!shost->transportt)
1390 		return 0;
1391 	if (shost->transportt->host_attrs.ac.class !=
1392 			&sas_host_class.class)
1393 		return 0;
1394 
1395 	i = to_sas_internal(shost->transportt);
1396 	return &i->end_dev_attr_cont.ac == cont &&
1397 		rphy->identify.device_type == SAS_END_DEVICE;
1398 }
1399 
sas_expander_match(struct attribute_container * cont,struct device * dev)1400 static int sas_expander_match(struct attribute_container *cont,
1401 			      struct device *dev)
1402 {
1403 	struct Scsi_Host *shost;
1404 	struct sas_internal *i;
1405 	struct sas_rphy *rphy;
1406 
1407 	if (!scsi_is_sas_rphy(dev))
1408 		return 0;
1409 	shost = dev_to_shost(dev->parent->parent);
1410 	rphy = dev_to_rphy(dev);
1411 
1412 	if (!shost->transportt)
1413 		return 0;
1414 	if (shost->transportt->host_attrs.ac.class !=
1415 			&sas_host_class.class)
1416 		return 0;
1417 
1418 	i = to_sas_internal(shost->transportt);
1419 	return &i->expander_attr_cont.ac == cont &&
1420 		(rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1421 		 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1422 }
1423 
sas_expander_release(struct device * dev)1424 static void sas_expander_release(struct device *dev)
1425 {
1426 	struct sas_rphy *rphy = dev_to_rphy(dev);
1427 	struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1428 
1429 	put_device(dev->parent);
1430 	kfree(edev);
1431 }
1432 
sas_end_device_release(struct device * dev)1433 static void sas_end_device_release(struct device *dev)
1434 {
1435 	struct sas_rphy *rphy = dev_to_rphy(dev);
1436 	struct sas_end_device *edev = rphy_to_end_device(rphy);
1437 
1438 	put_device(dev->parent);
1439 	kfree(edev);
1440 }
1441 
1442 /**
1443  * sas_rphy_initialize - common rphy initialization
1444  * @rphy:	rphy to initialise
1445  *
1446  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1447  * initialise the common rphy component of each.
1448  */
sas_rphy_initialize(struct sas_rphy * rphy)1449 static void sas_rphy_initialize(struct sas_rphy *rphy)
1450 {
1451 	INIT_LIST_HEAD(&rphy->list);
1452 }
1453 
1454 /**
1455  * sas_end_device_alloc - allocate an rphy for an end device
1456  * @parent: which port
1457  *
1458  * Allocates an SAS remote PHY structure, connected to @parent.
1459  *
1460  * Returns:
1461  *	SAS PHY allocated or %NULL if the allocation failed.
1462  */
sas_end_device_alloc(struct sas_port * parent)1463 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1464 {
1465 	struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1466 	struct sas_end_device *rdev;
1467 
1468 	rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1469 	if (!rdev) {
1470 		return NULL;
1471 	}
1472 
1473 	device_initialize(&rdev->rphy.dev);
1474 	rdev->rphy.dev.parent = get_device(&parent->dev);
1475 	rdev->rphy.dev.release = sas_end_device_release;
1476 	if (scsi_is_sas_expander_device(parent->dev.parent)) {
1477 		struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1478 		dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1479 			     shost->host_no, rphy->scsi_target_id,
1480 			     parent->port_identifier);
1481 	} else
1482 		dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1483 			     shost->host_no, parent->port_identifier);
1484 	rdev->rphy.identify.device_type = SAS_END_DEVICE;
1485 	sas_rphy_initialize(&rdev->rphy);
1486 	transport_setup_device(&rdev->rphy.dev);
1487 
1488 	return &rdev->rphy;
1489 }
1490 EXPORT_SYMBOL(sas_end_device_alloc);
1491 
1492 /**
1493  * sas_expander_alloc - allocate an rphy for an end device
1494  * @parent: which port
1495  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1496  *
1497  * Allocates an SAS remote PHY structure, connected to @parent.
1498  *
1499  * Returns:
1500  *	SAS PHY allocated or %NULL if the allocation failed.
1501  */
sas_expander_alloc(struct sas_port * parent,enum sas_device_type type)1502 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1503 				    enum sas_device_type type)
1504 {
1505 	struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1506 	struct sas_expander_device *rdev;
1507 	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1508 
1509 	BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1510 	       type != SAS_FANOUT_EXPANDER_DEVICE);
1511 
1512 	rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1513 	if (!rdev) {
1514 		return NULL;
1515 	}
1516 
1517 	device_initialize(&rdev->rphy.dev);
1518 	rdev->rphy.dev.parent = get_device(&parent->dev);
1519 	rdev->rphy.dev.release = sas_expander_release;
1520 	mutex_lock(&sas_host->lock);
1521 	rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1522 	mutex_unlock(&sas_host->lock);
1523 	dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1524 		     shost->host_no, rdev->rphy.scsi_target_id);
1525 	rdev->rphy.identify.device_type = type;
1526 	sas_rphy_initialize(&rdev->rphy);
1527 	transport_setup_device(&rdev->rphy.dev);
1528 
1529 	return &rdev->rphy;
1530 }
1531 EXPORT_SYMBOL(sas_expander_alloc);
1532 
1533 /**
1534  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1535  * @rphy:	The remote PHY to be added
1536  *
1537  * Publishes a SAS remote PHY to the rest of the system.
1538  */
sas_rphy_add(struct sas_rphy * rphy)1539 int sas_rphy_add(struct sas_rphy *rphy)
1540 {
1541 	struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1542 	struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1543 	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1544 	struct sas_identify *identify = &rphy->identify;
1545 	int error;
1546 
1547 	if (parent->rphy)
1548 		return -ENXIO;
1549 	parent->rphy = rphy;
1550 
1551 	error = device_add(&rphy->dev);
1552 	if (error)
1553 		return error;
1554 	transport_add_device(&rphy->dev);
1555 	transport_configure_device(&rphy->dev);
1556 	if (sas_bsg_initialize(shost, rphy))
1557 		printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1558 
1559 
1560 	mutex_lock(&sas_host->lock);
1561 	list_add_tail(&rphy->list, &sas_host->rphy_list);
1562 	if (identify->device_type == SAS_END_DEVICE &&
1563 	    (identify->target_port_protocols &
1564 	     (SAS_PROTOCOL_SSP | SAS_PROTOCOL_STP | SAS_PROTOCOL_SATA)))
1565 		rphy->scsi_target_id = sas_host->next_target_id++;
1566 	else if (identify->device_type == SAS_END_DEVICE)
1567 		rphy->scsi_target_id = -1;
1568 	mutex_unlock(&sas_host->lock);
1569 
1570 	if (identify->device_type == SAS_END_DEVICE &&
1571 	    rphy->scsi_target_id != -1) {
1572 		int lun;
1573 
1574 		if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1575 			lun = SCAN_WILD_CARD;
1576 		else
1577 			lun = 0;
1578 
1579 		scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1580 				 SCSI_SCAN_INITIAL);
1581 	}
1582 
1583 	return 0;
1584 }
1585 EXPORT_SYMBOL(sas_rphy_add);
1586 
1587 /**
1588  * sas_rphy_free  -  free a SAS remote PHY
1589  * @rphy: SAS remote PHY to free
1590  *
1591  * Frees the specified SAS remote PHY.
1592  *
1593  * Note:
1594  *   This function must only be called on a remote
1595  *   PHY that has not successfully been added using
1596  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1597  */
sas_rphy_free(struct sas_rphy * rphy)1598 void sas_rphy_free(struct sas_rphy *rphy)
1599 {
1600 	struct device *dev = &rphy->dev;
1601 	struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1602 	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1603 
1604 	mutex_lock(&sas_host->lock);
1605 	list_del(&rphy->list);
1606 	mutex_unlock(&sas_host->lock);
1607 
1608 	transport_destroy_device(dev);
1609 
1610 	put_device(dev);
1611 }
1612 EXPORT_SYMBOL(sas_rphy_free);
1613 
1614 /**
1615  * sas_rphy_delete  -  remove and free SAS remote PHY
1616  * @rphy:	SAS remote PHY to remove and free
1617  *
1618  * Removes the specified SAS remote PHY and frees it.
1619  */
1620 void
sas_rphy_delete(struct sas_rphy * rphy)1621 sas_rphy_delete(struct sas_rphy *rphy)
1622 {
1623 	sas_rphy_remove(rphy);
1624 	sas_rphy_free(rphy);
1625 }
1626 EXPORT_SYMBOL(sas_rphy_delete);
1627 
1628 /**
1629  * sas_rphy_unlink  -  unlink SAS remote PHY
1630  * @rphy:	SAS remote phy to unlink from its parent port
1631  *
1632  * Removes port reference to an rphy
1633  */
sas_rphy_unlink(struct sas_rphy * rphy)1634 void sas_rphy_unlink(struct sas_rphy *rphy)
1635 {
1636 	struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1637 
1638 	parent->rphy = NULL;
1639 }
1640 EXPORT_SYMBOL(sas_rphy_unlink);
1641 
1642 /**
1643  * sas_rphy_remove  -  remove SAS remote PHY
1644  * @rphy:	SAS remote phy to remove
1645  *
1646  * Removes the specified SAS remote PHY.
1647  */
1648 void
sas_rphy_remove(struct sas_rphy * rphy)1649 sas_rphy_remove(struct sas_rphy *rphy)
1650 {
1651 	struct device *dev = &rphy->dev;
1652 
1653 	switch (rphy->identify.device_type) {
1654 	case SAS_END_DEVICE:
1655 		scsi_remove_target(dev);
1656 		break;
1657 	case SAS_EDGE_EXPANDER_DEVICE:
1658 	case SAS_FANOUT_EXPANDER_DEVICE:
1659 		sas_remove_children(dev);
1660 		break;
1661 	default:
1662 		break;
1663 	}
1664 
1665 	sas_rphy_unlink(rphy);
1666 	bsg_remove_queue(rphy->q);
1667 	transport_remove_device(dev);
1668 	device_del(dev);
1669 }
1670 EXPORT_SYMBOL(sas_rphy_remove);
1671 
1672 /**
1673  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1674  * @dev:	device to check
1675  *
1676  * Returns:
1677  *	%1 if the device represents a SAS remote PHY, %0 else
1678  */
scsi_is_sas_rphy(const struct device * dev)1679 int scsi_is_sas_rphy(const struct device *dev)
1680 {
1681 	return dev->release == sas_end_device_release ||
1682 		dev->release == sas_expander_release;
1683 }
1684 EXPORT_SYMBOL(scsi_is_sas_rphy);
1685 
1686 
1687 /*
1688  * SCSI scan helper
1689  */
1690 
sas_user_scan(struct Scsi_Host * shost,uint channel,uint id,u64 lun)1691 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1692 		uint id, u64 lun)
1693 {
1694 	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1695 	struct sas_rphy *rphy;
1696 
1697 	mutex_lock(&sas_host->lock);
1698 	list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1699 		if (rphy->identify.device_type != SAS_END_DEVICE ||
1700 		    rphy->scsi_target_id == -1)
1701 			continue;
1702 
1703 		if ((channel == SCAN_WILD_CARD || channel == 0) &&
1704 		    (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1705 			scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1706 					 lun, SCSI_SCAN_MANUAL);
1707 		}
1708 	}
1709 	mutex_unlock(&sas_host->lock);
1710 
1711 	return 0;
1712 }
1713 
1714 
1715 /*
1716  * Setup / Teardown code
1717  */
1718 
1719 #define SETUP_TEMPLATE(attrb, field, perm, test)			\
1720 	i->private_##attrb[count] = dev_attr_##field;		\
1721 	i->private_##attrb[count].attr.mode = perm;			\
1722 	i->attrb[count] = &i->private_##attrb[count];			\
1723 	if (test)							\
1724 		count++
1725 
1726 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)	\
1727 	i->private_##attrb[count] = dev_attr_##field;		\
1728 	i->private_##attrb[count].attr.mode = perm;			\
1729 	if (ro_test) {							\
1730 		i->private_##attrb[count].attr.mode = ro_perm;		\
1731 		i->private_##attrb[count].store = NULL;			\
1732 	}								\
1733 	i->attrb[count] = &i->private_##attrb[count];			\
1734 	if (test)							\
1735 		count++
1736 
1737 #define SETUP_RPORT_ATTRIBUTE(field) 					\
1738 	SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1739 
1740 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)			\
1741 	SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1742 
1743 #define SETUP_PHY_ATTRIBUTE(field)					\
1744 	SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1745 
1746 #define SETUP_PHY_ATTRIBUTE_RW(field)					\
1747 	SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,	\
1748 			!i->f->set_phy_speed, S_IRUGO)
1749 
1750 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)			\
1751 	SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,	\
1752 			  !i->f->func, S_IRUGO)
1753 
1754 #define SETUP_PORT_ATTRIBUTE(field)					\
1755 	SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1756 
1757 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)			\
1758 	SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1759 
1760 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)				\
1761 	SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1762 
1763 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)		\
1764 	SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1765 
1766 #define SETUP_END_DEV_ATTRIBUTE(field)					\
1767 	SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1768 
1769 #define SETUP_EXPANDER_ATTRIBUTE(field)					\
1770 	SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1771 
1772 /**
1773  * sas_attach_transport  -  instantiate SAS transport template
1774  * @ft:		SAS transport class function template
1775  */
1776 struct scsi_transport_template *
sas_attach_transport(struct sas_function_template * ft)1777 sas_attach_transport(struct sas_function_template *ft)
1778 {
1779 	struct sas_internal *i;
1780 	int count;
1781 
1782 	i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1783 	if (!i)
1784 		return NULL;
1785 
1786 	i->t.user_scan = sas_user_scan;
1787 
1788 	i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1789 	i->t.host_attrs.ac.class = &sas_host_class.class;
1790 	i->t.host_attrs.ac.match = sas_host_match;
1791 	transport_container_register(&i->t.host_attrs);
1792 	i->t.host_size = sizeof(struct sas_host_attrs);
1793 
1794 	i->phy_attr_cont.ac.class = &sas_phy_class.class;
1795 	i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1796 	i->phy_attr_cont.ac.match = sas_phy_match;
1797 	transport_container_register(&i->phy_attr_cont);
1798 
1799 	i->port_attr_cont.ac.class = &sas_port_class.class;
1800 	i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1801 	i->port_attr_cont.ac.match = sas_port_match;
1802 	transport_container_register(&i->port_attr_cont);
1803 
1804 	i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1805 	i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1806 	i->rphy_attr_cont.ac.match = sas_rphy_match;
1807 	transport_container_register(&i->rphy_attr_cont);
1808 
1809 	i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1810 	i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1811 	i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1812 	transport_container_register(&i->end_dev_attr_cont);
1813 
1814 	i->expander_attr_cont.ac.class = &sas_expander_class.class;
1815 	i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1816 	i->expander_attr_cont.ac.match = sas_expander_match;
1817 	transport_container_register(&i->expander_attr_cont);
1818 
1819 	i->f = ft;
1820 
1821 	count = 0;
1822 	SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1823 	SETUP_PHY_ATTRIBUTE(target_port_protocols);
1824 	SETUP_PHY_ATTRIBUTE(device_type);
1825 	SETUP_PHY_ATTRIBUTE(sas_address);
1826 	SETUP_PHY_ATTRIBUTE(phy_identifier);
1827 	SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1828 	SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1829 	SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1830 	SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1831 	SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1832 
1833 	SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1834 	SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1835 	SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1836 	SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1837 	SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1838 	SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1839 	SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1840 	i->phy_attrs[count] = NULL;
1841 
1842 	count = 0;
1843 	SETUP_PORT_ATTRIBUTE(num_phys);
1844 	i->port_attrs[count] = NULL;
1845 
1846 	count = 0;
1847 	SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1848 	SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1849 	SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1850 	SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1851 	SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1852 	SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1853 	SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1854 				       get_enclosure_identifier);
1855 	SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1856 				       get_bay_identifier);
1857 	i->rphy_attrs[count] = NULL;
1858 
1859 	count = 0;
1860 	SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1861 	SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1862 	SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1863 	SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1864 	SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1865 	i->end_dev_attrs[count] = NULL;
1866 
1867 	count = 0;
1868 	SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1869 	SETUP_EXPANDER_ATTRIBUTE(product_id);
1870 	SETUP_EXPANDER_ATTRIBUTE(product_rev);
1871 	SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1872 	SETUP_EXPANDER_ATTRIBUTE(component_id);
1873 	SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1874 	SETUP_EXPANDER_ATTRIBUTE(level);
1875 	i->expander_attrs[count] = NULL;
1876 
1877 	return &i->t;
1878 }
1879 EXPORT_SYMBOL(sas_attach_transport);
1880 
1881 /**
1882  * sas_release_transport  -  release SAS transport template instance
1883  * @t:		transport template instance
1884  */
sas_release_transport(struct scsi_transport_template * t)1885 void sas_release_transport(struct scsi_transport_template *t)
1886 {
1887 	struct sas_internal *i = to_sas_internal(t);
1888 
1889 	transport_container_unregister(&i->t.host_attrs);
1890 	transport_container_unregister(&i->phy_attr_cont);
1891 	transport_container_unregister(&i->port_attr_cont);
1892 	transport_container_unregister(&i->rphy_attr_cont);
1893 	transport_container_unregister(&i->end_dev_attr_cont);
1894 	transport_container_unregister(&i->expander_attr_cont);
1895 
1896 	kfree(i);
1897 }
1898 EXPORT_SYMBOL(sas_release_transport);
1899 
sas_transport_init(void)1900 static __init int sas_transport_init(void)
1901 {
1902 	int error;
1903 
1904 	error = transport_class_register(&sas_host_class);
1905 	if (error)
1906 		goto out;
1907 	error = transport_class_register(&sas_phy_class);
1908 	if (error)
1909 		goto out_unregister_transport;
1910 	error = transport_class_register(&sas_port_class);
1911 	if (error)
1912 		goto out_unregister_phy;
1913 	error = transport_class_register(&sas_rphy_class);
1914 	if (error)
1915 		goto out_unregister_port;
1916 	error = transport_class_register(&sas_end_dev_class);
1917 	if (error)
1918 		goto out_unregister_rphy;
1919 	error = transport_class_register(&sas_expander_class);
1920 	if (error)
1921 		goto out_unregister_end_dev;
1922 
1923 	return 0;
1924 
1925  out_unregister_end_dev:
1926 	transport_class_unregister(&sas_end_dev_class);
1927  out_unregister_rphy:
1928 	transport_class_unregister(&sas_rphy_class);
1929  out_unregister_port:
1930 	transport_class_unregister(&sas_port_class);
1931  out_unregister_phy:
1932 	transport_class_unregister(&sas_phy_class);
1933  out_unregister_transport:
1934 	transport_class_unregister(&sas_host_class);
1935  out:
1936 	return error;
1937 
1938 }
1939 
sas_transport_exit(void)1940 static void __exit sas_transport_exit(void)
1941 {
1942 	transport_class_unregister(&sas_host_class);
1943 	transport_class_unregister(&sas_phy_class);
1944 	transport_class_unregister(&sas_port_class);
1945 	transport_class_unregister(&sas_rphy_class);
1946 	transport_class_unregister(&sas_end_dev_class);
1947 	transport_class_unregister(&sas_expander_class);
1948 }
1949 
1950 MODULE_AUTHOR("Christoph Hellwig");
1951 MODULE_DESCRIPTION("SAS Transport Attributes");
1952 MODULE_LICENSE("GPL");
1953 
1954 module_init(sas_transport_init);
1955 module_exit(sas_transport_exit);
1956