2 * SCSI Enclosure Services
4 * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
6 **-----------------------------------------------------------------------------
8 ** This program is free software; you can redistribute it and/or
9 ** modify it under the terms of the GNU General Public License
10 ** version 2 as published by the Free Software Foundation.
12 ** This program is distributed in the hope that it will be useful,
13 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ** GNU General Public License for more details.
17 ** You should have received a copy of the GNU General Public License
18 ** along with this program; if not, write to the Free Software
19 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 **-----------------------------------------------------------------------------
24 #include <linux/slab.h>
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/enclosure.h>
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_cmnd.h>
31 #include <scsi/scsi_dbg.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_driver.h>
34 #include <scsi/scsi_host.h>
39 unsigned char *page10;
45 struct ses_component {
50 static int ses_probe(struct device *dev)
52 struct scsi_device *sdev = to_scsi_device(dev);
55 if (sdev->type != TYPE_ENCLOSURE)
59 sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
65 #define SES_TIMEOUT (30 * HZ)
68 static int ses_recv_diag(struct scsi_device *sdev, int page_code,
69 void *buf, int bufflen)
71 unsigned char cmd[] = {
80 return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
81 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
84 static int ses_send_diag(struct scsi_device *sdev, int page_code,
85 void *buf, int bufflen)
89 unsigned char cmd[] = {
91 0x10, /* Set PF bit */
98 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
99 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
101 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
106 static int ses_set_page2_descriptor(struct enclosure_device *edev,
107 struct enclosure_component *ecomp,
110 int i, j, count = 0, descriptor = ecomp->number;
111 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
112 struct ses_device *ses_dev = edev->scratch;
113 unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
114 unsigned char *desc_ptr = ses_dev->page2 + 8;
116 /* Clear everything */
117 memset(desc_ptr, 0, ses_dev->page2_len - 8);
118 for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
119 for (j = 0; j < type_ptr[1]; j++) {
121 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
122 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
124 if (count++ == descriptor) {
125 memcpy(desc_ptr, desc, 4);
128 /* clear reserved, just in case */
134 return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
137 static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
138 struct enclosure_component *ecomp)
140 int i, j, count = 0, descriptor = ecomp->number;
141 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
142 struct ses_device *ses_dev = edev->scratch;
143 unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
144 unsigned char *desc_ptr = ses_dev->page2 + 8;
146 ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
148 for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
149 for (j = 0; j < type_ptr[1]; j++) {
151 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
152 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
154 if (count++ == descriptor)
161 static void ses_get_fault(struct enclosure_device *edev,
162 struct enclosure_component *ecomp)
166 desc = ses_get_page2_descriptor(edev, ecomp);
168 ecomp->fault = (desc[3] & 0x60) >> 4;
171 static int ses_set_fault(struct enclosure_device *edev,
172 struct enclosure_component *ecomp,
173 enum enclosure_component_setting val)
175 unsigned char desc[4] = {0 };
178 case ENCLOSURE_SETTING_DISABLED:
179 /* zero is disabled */
181 case ENCLOSURE_SETTING_ENABLED:
185 /* SES doesn't do the SGPIO blink settings */
189 return ses_set_page2_descriptor(edev, ecomp, desc);
192 static void ses_get_status(struct enclosure_device *edev,
193 struct enclosure_component *ecomp)
197 desc = ses_get_page2_descriptor(edev, ecomp);
199 ecomp->status = (desc[0] & 0x0f);
202 static void ses_get_locate(struct enclosure_device *edev,
203 struct enclosure_component *ecomp)
207 desc = ses_get_page2_descriptor(edev, ecomp);
209 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
212 static int ses_set_locate(struct enclosure_device *edev,
213 struct enclosure_component *ecomp,
214 enum enclosure_component_setting val)
216 unsigned char desc[4] = {0 };
219 case ENCLOSURE_SETTING_DISABLED:
220 /* zero is disabled */
222 case ENCLOSURE_SETTING_ENABLED:
226 /* SES doesn't do the SGPIO blink settings */
229 return ses_set_page2_descriptor(edev, ecomp, desc);
232 static int ses_set_active(struct enclosure_device *edev,
233 struct enclosure_component *ecomp,
234 enum enclosure_component_setting val)
236 unsigned char desc[4] = {0 };
239 case ENCLOSURE_SETTING_DISABLED:
240 /* zero is disabled */
243 case ENCLOSURE_SETTING_ENABLED:
248 /* SES doesn't do the SGPIO blink settings */
251 return ses_set_page2_descriptor(edev, ecomp, desc);
254 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
255 .get_fault = ses_get_fault,
256 .set_fault = ses_set_fault,
257 .get_status = ses_get_status,
258 .get_locate = ses_get_locate,
259 .set_locate = ses_set_locate,
260 .set_active = ses_set_active,
263 struct ses_host_edev {
264 struct Scsi_Host *shost;
265 struct enclosure_device *edev;
269 int ses_match_host(struct enclosure_device *edev, void *data)
271 struct ses_host_edev *sed = data;
272 struct scsi_device *sdev;
274 if (!scsi_is_sdev_device(edev->edev.parent))
277 sdev = to_scsi_device(edev->edev.parent);
279 if (sdev->host != sed->shost)
287 static void ses_process_descriptor(struct enclosure_component *ecomp,
290 int eip = desc[0] & 0x10;
291 int invalid = desc[0] & 0x80;
292 enum scsi_protocol proto = desc[0] & 0x0f;
294 struct ses_component *scomp = ecomp->scratch;
303 case SCSI_PROTOCOL_SAS:
308 /* only take the phy0 addr */
309 addr = (u64)d[12] << 56 |
319 /* FIXME: Need to add more protocols than just SAS */
330 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
333 struct efd *efd = data;
335 struct ses_component *scomp;
337 if (!edev->component[0].scratch)
340 for (i = 0; i < edev->components; i++) {
341 scomp = edev->component[i].scratch;
342 if (scomp->addr != efd->addr)
345 enclosure_add_device(edev, i, efd->dev);
351 #define INIT_ALLOC_SIZE 32
353 static void ses_enclosure_data_process(struct enclosure_device *edev,
354 struct scsi_device *sdev,
358 unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
359 int i, j, page7_len, len, components;
360 struct ses_device *ses_dev = edev->scratch;
361 int types = ses_dev->page1[10];
362 unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
365 goto simple_populate;
367 /* re-read page 10 */
369 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
370 /* Page 7 for the descriptors is optional */
371 result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
373 goto simple_populate;
375 page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
376 /* add 1 for trailing '\0' we'll use */
377 buf = kzalloc(len + 1, GFP_KERNEL);
379 goto simple_populate;
380 result = ses_recv_diag(sdev, 7, buf, len);
390 len = (desc_ptr[2] << 8) + desc_ptr[3];
391 /* skip past overall descriptor */
395 addl_desc_ptr = ses_dev->page10 + 8;
396 type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
398 for (i = 0; i < types; i++, type_ptr += 4) {
399 for (j = 0; j < type_ptr[1]; j++) {
401 struct enclosure_component *ecomp;
404 if (desc_ptr >= buf + page7_len) {
407 len = (desc_ptr[2] << 8) + desc_ptr[3];
409 /* Add trailing zero - pushes into
411 desc_ptr[len] = '\0';
415 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
416 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
419 ecomp = enclosure_component_register(edev,
424 ecomp = &edev->component[components++];
426 if (!IS_ERR(ecomp) && addl_desc_ptr)
427 ses_process_descriptor(ecomp,
434 addl_desc_ptr += addl_desc_ptr[1] + 2;
442 static void ses_match_to_enclosure(struct enclosure_device *edev,
443 struct scsi_device *sdev)
447 unsigned int vpd_len;
452 buf = kmalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
453 if (!buf || scsi_get_vpd_page(sdev, 0x83, buf, INIT_ALLOC_SIZE))
456 ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
458 vpd_len = ((buf[2] << 8) | buf[3]) + 4;
460 buf = kmalloc(vpd_len, GFP_KERNEL);
461 if (!buf ||scsi_get_vpd_page(sdev, 0x83, buf, vpd_len))
465 while (desc < buf + vpd_len) {
466 enum scsi_protocol proto = desc[0] >> 4;
467 u8 code_set = desc[0] & 0x0f;
468 u8 piv = desc[1] & 0x80;
469 u8 assoc = (desc[1] & 0x30) >> 4;
470 u8 type = desc[1] & 0x0f;
473 if (piv && code_set == 1 && assoc == 1
474 && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
475 efd.addr = (u64)desc[4] << 56 |
489 efd.dev = &sdev->sdev_gendev;
491 enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
496 static int ses_intf_add(struct device *cdev,
497 struct class_interface *intf)
499 struct scsi_device *sdev = to_scsi_device(cdev->parent);
500 struct scsi_device *tmp_sdev;
501 unsigned char *buf = NULL, *hdr_buf, *type_ptr;
502 struct ses_device *ses_dev;
504 int i, types, len, components = 0;
506 struct enclosure_device *edev;
507 struct ses_component *scomp = NULL;
509 if (!scsi_device_enclosure(sdev)) {
510 /* not an enclosure, but might be in one */
511 struct enclosure_device *prev = NULL;
513 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
514 ses_match_to_enclosure(edev, sdev);
520 /* TYPE_ENCLOSURE prints a message in probe */
521 if (sdev->type != TYPE_ENCLOSURE)
522 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
524 ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
525 hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
526 if (!hdr_buf || !ses_dev)
529 result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
533 if (hdr_buf[1] != 0) {
534 /* FIXME: need subenclosure support; I've just never
535 * seen a device with subenclosures and it makes the
536 * traversal routines more complex */
537 sdev_printk(KERN_ERR, sdev,
538 "FIXME driver has no support for subenclosures (%d)\n",
543 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
544 buf = kzalloc(len, GFP_KERNEL);
548 result = ses_recv_diag(sdev, 1, buf, len);
554 type_ptr = buf + 12 + buf[11];
556 for (i = 0; i < types; i++, type_ptr += 4) {
557 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
558 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
559 components += type_ptr[1];
561 ses_dev->page1 = buf;
562 ses_dev->page1_len = len;
565 result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
569 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
570 buf = kzalloc(len, GFP_KERNEL);
574 /* make sure getting page 2 actually works */
575 result = ses_recv_diag(sdev, 2, buf, len);
578 ses_dev->page2 = buf;
579 ses_dev->page2_len = len;
582 /* The additional information page --- allows us
583 * to match up the devices */
584 result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
587 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
588 buf = kzalloc(len, GFP_KERNEL);
592 result = ses_recv_diag(sdev, 10, buf, len);
595 ses_dev->page10 = buf;
596 ses_dev->page10_len = len;
599 scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
603 edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
604 components, &ses_enclosure_callbacks);
612 edev->scratch = ses_dev;
613 for (i = 0; i < components; i++)
614 edev->component[i].scratch = scomp + i;
616 ses_enclosure_data_process(edev, sdev, 1);
618 /* see if there are any devices matching before
619 * we found the enclosure */
620 shost_for_each_device(tmp_sdev, sdev->host) {
621 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
623 ses_match_to_enclosure(edev, tmp_sdev);
629 sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
635 kfree(ses_dev->page10);
636 kfree(ses_dev->page2);
637 kfree(ses_dev->page1);
641 sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
645 static int ses_remove(struct device *dev)
650 static void ses_intf_remove_component(struct scsi_device *sdev)
652 struct enclosure_device *edev, *prev = NULL;
654 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
656 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
660 put_device(&edev->edev);
663 static void ses_intf_remove_enclosure(struct scsi_device *sdev)
665 struct enclosure_device *edev;
666 struct ses_device *ses_dev;
668 /* exact match to this enclosure */
669 edev = enclosure_find(&sdev->sdev_gendev, NULL);
673 ses_dev = edev->scratch;
674 edev->scratch = NULL;
676 kfree(ses_dev->page10);
677 kfree(ses_dev->page1);
678 kfree(ses_dev->page2);
681 kfree(edev->component[0].scratch);
683 put_device(&edev->edev);
684 enclosure_unregister(edev);
687 static void ses_intf_remove(struct device *cdev,
688 struct class_interface *intf)
690 struct scsi_device *sdev = to_scsi_device(cdev->parent);
692 if (!scsi_device_enclosure(sdev))
693 ses_intf_remove_component(sdev);
695 ses_intf_remove_enclosure(sdev);
698 static struct class_interface ses_interface = {
699 .add_dev = ses_intf_add,
700 .remove_dev = ses_intf_remove,
703 static struct scsi_driver ses_template = {
704 .owner = THIS_MODULE,
708 .remove = ses_remove,
712 static int __init ses_init(void)
716 err = scsi_register_interface(&ses_interface);
720 err = scsi_register_driver(&ses_template.gendrv);
727 scsi_unregister_interface(&ses_interface);
731 static void __exit ses_exit(void)
733 scsi_unregister_driver(&ses_template.gendrv);
734 scsi_unregister_interface(&ses_interface);
737 module_init(ses_init);
738 module_exit(ses_exit);
740 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
742 MODULE_AUTHOR("James Bottomley");
743 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
744 MODULE_LICENSE("GPL v2");