[mirror_ubuntu-artful-kernel.git] / drivers / scsi / ses.c

/*
 * SCSI Enclosure Services
 *
 * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
 *
**-----------------------------------------------------------------------------
**
**  This program is free software; you can redistribute it and/or
**  modify it under the terms of the GNU General Public License
**  version 2 as published by the Free Software Foundation.
**
**  This program is distributed in the hope that it will be useful,
**  but WITHOUT ANY WARRANTY; without even the implied warranty of
**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**  GNU General Public License for more details.
**
**  You should have received a copy of the GNU General Public License
**  along with this program; if not, write to the Free Software
**  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
*/

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/enclosure.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_driver.h>
#include <scsi/scsi_host.h>

struct ses_device {
	unsigned char *page1;
	unsigned char *page1_types;
	unsigned char *page2;
	unsigned char *page10;
	short page1_len;
	short page1_num_types;
	short page2_len;
	short page10_len;
};

struct ses_component {
	u64 addr;
	unsigned char *desc;
};

static int ses_probe(struct device *dev)
{
	struct scsi_device *sdev = to_scsi_device(dev);
	int err = -ENODEV;

	if (sdev->type != TYPE_ENCLOSURE)
		goto out;

	err = 0;
	sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");

 out:
	return err;
}

#define SES_TIMEOUT (30 * HZ)
#define SES_RETRIES 3

static int ses_recv_diag(struct scsi_device *sdev, int page_code,
			 void *buf, int bufflen)
{
	unsigned char cmd[] = {
		RECEIVE_DIAGNOSTIC,
		1,		/* Set PCV bit */
		page_code,
		bufflen >> 8,
		bufflen & 0xff,
		0
	};

	return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
				NULL, SES_TIMEOUT, SES_RETRIES, NULL);
}

static int ses_send_diag(struct scsi_device *sdev, int page_code,
			 void *buf, int bufflen)
{
	u32 result;

	unsigned char cmd[] = {
		SEND_DIAGNOSTIC,
		0x10,		/* Set PF bit */
		0,
		bufflen >> 8,
		bufflen & 0xff,
		0
	};

	result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
				  NULL, SES_TIMEOUT, SES_RETRIES, NULL);
	if (result)
		sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
			    result);
	return result;
}

static int ses_set_page2_descriptor(struct enclosure_device *edev,
				      struct enclosure_component *ecomp,
				      unsigned char *desc)
{
	int i, j, count = 0, descriptor = ecomp->number;
	struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
	struct ses_device *ses_dev = edev->scratch;
	unsigned char *type_ptr = ses_dev->page1_types;
	unsigned char *desc_ptr = ses_dev->page2 + 8;

	/* Clear everything */
	memset(desc_ptr, 0, ses_dev->page2_len - 8);
	for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
		for (j = 0; j < type_ptr[1]; j++) {
			desc_ptr += 4;
			if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
			    type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
				continue;
			if (count++ == descriptor) {
				memcpy(desc_ptr, desc, 4);
				/* set select */
				desc_ptr[0] |= 0x80;
				/* clear reserved, just in case */
				desc_ptr[0] &= 0xf0;
			}
		}
	}

	return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
}

static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
				      struct enclosure_component *ecomp)
{
	int i, j, count = 0, descriptor = ecomp->number;
	struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
	struct ses_device *ses_dev = edev->scratch;
	unsigned char *type_ptr = ses_dev->page1_types;
	unsigned char *desc_ptr = ses_dev->page2 + 8;

	ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);

	for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
		for (j = 0; j < type_ptr[1]; j++) {
			desc_ptr += 4;
			if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
			    type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
				continue;
			if (count++ == descriptor)
				return desc_ptr;
		}
	}
	return NULL;
}

static void ses_get_fault(struct enclosure_device *edev,
			  struct enclosure_component *ecomp)
{
	unsigned char *desc;

	desc = ses_get_page2_descriptor(edev, ecomp);
	if (desc)
		ecomp->fault = (desc[3] & 0x60) >> 4;
}

static int ses_set_fault(struct enclosure_device *edev,
			  struct enclosure_component *ecomp,
			 enum enclosure_component_setting val)
{
	unsigned char desc[4] = {0 };

	switch (val) {
	case ENCLOSURE_SETTING_DISABLED:
		/* zero is disabled */
		break;
	case ENCLOSURE_SETTING_ENABLED:
		desc[2] = 0x02;
		break;
	default:
		/* SES doesn't do the SGPIO blink settings */
		return -EINVAL;
	}

	return ses_set_page2_descriptor(edev, ecomp, desc);
}

static void ses_get_status(struct enclosure_device *edev,
			   struct enclosure_component *ecomp)
{
	unsigned char *desc;

	desc = ses_get_page2_descriptor(edev, ecomp);
	if (desc)
		ecomp->status = (desc[0] & 0x0f);
}

static void ses_get_locate(struct enclosure_device *edev,
			   struct enclosure_component *ecomp)
{
	unsigned char *desc;

	desc = ses_get_page2_descriptor(edev, ecomp);
	if (desc)
		ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
}

static int ses_set_locate(struct enclosure_device *edev,
			  struct enclosure_component *ecomp,
			  enum enclosure_component_setting val)
{
	unsigned char desc[4] = {0 };

	switch (val) {
	case ENCLOSURE_SETTING_DISABLED:
		/* zero is disabled */
		break;
	case ENCLOSURE_SETTING_ENABLED:
		desc[2] = 0x02;
		break;
	default:
		/* SES doesn't do the SGPIO blink settings */
		return -EINVAL;
	}
	return ses_set_page2_descriptor(edev, ecomp, desc);
}

static int ses_set_active(struct enclosure_device *edev,
			  struct enclosure_component *ecomp,
			  enum enclosure_component_setting val)
{
	unsigned char desc[4] = {0 };

	switch (val) {
	case ENCLOSURE_SETTING_DISABLED:
		/* zero is disabled */
		ecomp->active = 0;
		break;
	case ENCLOSURE_SETTING_ENABLED:
		desc[2] = 0x80;
		ecomp->active = 1;
		break;
	default:
		/* SES doesn't do the SGPIO blink settings */
		return -EINVAL;
	}
	return ses_set_page2_descriptor(edev, ecomp, desc);
}

static struct enclosure_component_callbacks ses_enclosure_callbacks = {
	.get_fault		= ses_get_fault,
	.set_fault		= ses_set_fault,
	.get_status		= ses_get_status,
	.get_locate		= ses_get_locate,
	.set_locate		= ses_set_locate,
	.set_active		= ses_set_active,
};

struct ses_host_edev {
	struct Scsi_Host *shost;
	struct enclosure_device *edev;
};

#if 0
int ses_match_host(struct enclosure_device *edev, void *data)
{
	struct ses_host_edev *sed = data;
	struct scsi_device *sdev;

	if (!scsi_is_sdev_device(edev->edev.parent))
		return 0;

	sdev = to_scsi_device(edev->edev.parent);

	if (sdev->host != sed->shost)
		return 0;

	sed->edev = edev;
	return 1;
}
#endif  /*  0  */

static void ses_process_descriptor(struct enclosure_component *ecomp,
				   unsigned char *desc)
{
	int eip = desc[0] & 0x10;
	int invalid = desc[0] & 0x80;
	enum scsi_protocol proto = desc[0] & 0x0f;
	u64 addr = 0;
	struct ses_component *scomp = ecomp->scratch;
	unsigned char *d;

	scomp->desc = desc;

	if (invalid)
		return;

	switch (proto) {
	case SCSI_PROTOCOL_SAS:
		if (eip)
			d = desc + 8;
		else
			d = desc + 4;
		/* only take the phy0 addr */
		addr = (u64)d[12] << 56 |
			(u64)d[13] << 48 |
			(u64)d[14] << 40 |
			(u64)d[15] << 32 |
			(u64)d[16] << 24 |
			(u64)d[17] << 16 |
			(u64)d[18] << 8 |
			(u64)d[19];
		break;
	default:
		/* FIXME: Need to add more protocols than just SAS */
		break;
	}
	scomp->addr = addr;
}

struct efd {
	u64 addr;
	struct device *dev;
};

static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
				      void *data)
{
	struct efd *efd = data;
	int i;
	struct ses_component *scomp;

	if (!edev->component[0].scratch)
		return 0;

	for (i = 0; i < edev->components; i++) {
		scomp = edev->component[i].scratch;
		if (scomp->addr != efd->addr)
			continue;

		enclosure_add_device(edev, i, efd->dev);
		return 1;
	}
	return 0;
}

#define INIT_ALLOC_SIZE 32

static void ses_enclosure_data_process(struct enclosure_device *edev,
				       struct scsi_device *sdev,
				       int create)
{
	u32 result;
	unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
	int i, j, page7_len, len, components;
	struct ses_device *ses_dev = edev->scratch;
	int types = ses_dev->page1_num_types;
	unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);

	if (!hdr_buf)
		goto simple_populate;

	/* re-read page 10 */
	if (ses_dev->page10)
		ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
	/* Page 7 for the descriptors is optional */
	result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
	if (result)
		goto simple_populate;

	page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
	/* add 1 for trailing '\0' we'll use */
	buf = kzalloc(len + 1, GFP_KERNEL);
	if (!buf)
		goto simple_populate;
	result = ses_recv_diag(sdev, 7, buf, len);
	if (result) {
 simple_populate:
		kfree(buf);
		buf = NULL;
		desc_ptr = NULL;
		len = 0;
		page7_len = 0;
	} else {
		desc_ptr = buf + 8;
		len = (desc_ptr[2] << 8) + desc_ptr[3];
		/* skip past overall descriptor */
		desc_ptr += len + 4;
	}
	if (ses_dev->page10)
		addl_desc_ptr = ses_dev->page10 + 8;
	type_ptr = ses_dev->page1_types;
	components = 0;
	for (i = 0; i < types; i++, type_ptr += 4) {
		for (j = 0; j < type_ptr[1]; j++) {
			char *name = NULL;
			struct enclosure_component *ecomp;

			if (desc_ptr) {
				if (desc_ptr >= buf + page7_len) {
					desc_ptr = NULL;
				} else {
					len = (desc_ptr[2] << 8) + desc_ptr[3];
					desc_ptr += 4;
					/* Add trailing zero - pushes into
					 * reserved space */
					desc_ptr[len] = '\0';
					name = desc_ptr;
				}
			}
			if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
			    type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {

				if (create)
					ecomp =	enclosure_component_register(edev,
									     components++,
									     type_ptr[0],
									     name);
				else
					ecomp = &edev->component[components++];

				if (!IS_ERR(ecomp) && addl_desc_ptr)
					ses_process_descriptor(ecomp,
							       addl_desc_ptr);
			}
			if (desc_ptr)
				desc_ptr += len;

			if (addl_desc_ptr)
				addl_desc_ptr += addl_desc_ptr[1] + 2;

		}
	}
	kfree(buf);
	kfree(hdr_buf);
}

static void ses_match_to_enclosure(struct enclosure_device *edev,
				   struct scsi_device *sdev)
{
	unsigned char *buf;
	unsigned char *desc;
	unsigned int vpd_len;
	struct efd efd = {
		.addr = 0,
	};

	buf = kmalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
	if (!buf || scsi_get_vpd_page(sdev, 0x83, buf, INIT_ALLOC_SIZE))
		goto free;

	ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);

	vpd_len = ((buf[2] << 8) | buf[3]) + 4;
	kfree(buf);
	buf = kmalloc(vpd_len, GFP_KERNEL);
	if (!buf ||scsi_get_vpd_page(sdev, 0x83, buf, vpd_len))
		goto free;

	desc = buf + 4;
	while (desc < buf + vpd_len) {
		enum scsi_protocol proto = desc[0] >> 4;
		u8 code_set = desc[0] & 0x0f;
		u8 piv = desc[1] & 0x80;
		u8 assoc = (desc[1] & 0x30) >> 4;
		u8 type = desc[1] & 0x0f;
		u8 len = desc[3];

		if (piv && code_set == 1 && assoc == 1
		    && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
			efd.addr = (u64)desc[4] << 56 |
				(u64)desc[5] << 48 |
				(u64)desc[6] << 40 |
				(u64)desc[7] << 32 |
				(u64)desc[8] << 24 |
				(u64)desc[9] << 16 |
				(u64)desc[10] << 8 |
				(u64)desc[11];

		desc += len + 4;
	}
	if (!efd.addr)
		goto free;

	efd.dev = &sdev->sdev_gendev;

	enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
 free:
	kfree(buf);
}

static int ses_intf_add(struct device *cdev,
			struct class_interface *intf)
{
	struct scsi_device *sdev = to_scsi_device(cdev->parent);
	struct scsi_device *tmp_sdev;
	unsigned char *buf = NULL, *hdr_buf, *type_ptr;
	struct ses_device *ses_dev;
	u32 result;
	int i, types, len, components = 0;
	int err = -ENOMEM;
	int num_enclosures;
	struct enclosure_device *edev;
	struct ses_component *scomp = NULL;

	if (!scsi_device_enclosure(sdev)) {
		/* not an enclosure, but might be in one */
		struct enclosure_device *prev = NULL;

		while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
			ses_match_to_enclosure(edev, sdev);
			prev = edev;
		}
		return -ENODEV;
	}

	/* TYPE_ENCLOSURE prints a message in probe */
	if (sdev->type != TYPE_ENCLOSURE)
		sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");

	ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
	hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
	if (!hdr_buf || !ses_dev)
		goto err_init_free;

	result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
	if (result)
		goto recv_failed;

	len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
	buf = kzalloc(len, GFP_KERNEL);
	if (!buf)
		goto err_free;

	result = ses_recv_diag(sdev, 1, buf, len);
	if (result)
		goto recv_failed;

	types = 0;

	/* we always have one main enclosure and the rest are referred
	 * to as secondary subenclosures */
	num_enclosures = buf[1] + 1;

	/* begin at the enclosure descriptor */
	type_ptr = buf + 8;
	/* skip all the enclosure descriptors */
	for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
		types += type_ptr[2];
		type_ptr += type_ptr[3] + 4;
	}

	ses_dev->page1_types = type_ptr;
	ses_dev->page1_num_types = types;

	for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
		if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
		    type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
			components += type_ptr[1];
	}
	ses_dev->page1 = buf;
	ses_dev->page1_len = len;
	buf = NULL;

	result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
	if (result)
		goto recv_failed;

	len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
	buf = kzalloc(len, GFP_KERNEL);
	if (!buf)
		goto err_free;

	/* make sure getting page 2 actually works */
	result = ses_recv_diag(sdev, 2, buf, len);
	if (result)
		goto recv_failed;
	ses_dev->page2 = buf;
	ses_dev->page2_len = len;
	buf = NULL;

	/* The additional information page --- allows us
	 * to match up the devices */
	result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
	if (!result) {

		len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
		buf = kzalloc(len, GFP_KERNEL);
		if (!buf)
			goto err_free;

		result = ses_recv_diag(sdev, 10, buf, len);
		if (result)
			goto recv_failed;
		ses_dev->page10 = buf;
		ses_dev->page10_len = len;
		buf = NULL;
	}
	scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
	if (!scomp)
		goto err_free;

	edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
				  components, &ses_enclosure_callbacks);
	if (IS_ERR(edev)) {
		err = PTR_ERR(edev);
		goto err_free;
	}

	kfree(hdr_buf);

	edev->scratch = ses_dev;
	for (i = 0; i < components; i++)
		edev->component[i].scratch = scomp + i;

	ses_enclosure_data_process(edev, sdev, 1);

	/* see if there are any devices matching before
	 * we found the enclosure */
	shost_for_each_device(tmp_sdev, sdev->host) {
		if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
			continue;
		ses_match_to_enclosure(edev, tmp_sdev);
	}

	return 0;

 recv_failed:
	sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
		    result);
	err = -ENODEV;
 err_free:
	kfree(buf);
	kfree(scomp);
	kfree(ses_dev->page10);
	kfree(ses_dev->page2);
	kfree(ses_dev->page1);
 err_init_free:
	kfree(ses_dev);
	kfree(hdr_buf);
	sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
	return err;
}

static int ses_remove(struct device *dev)
{
	return 0;
}

static void ses_intf_remove_component(struct scsi_device *sdev)
{
	struct enclosure_device *edev, *prev = NULL;

	while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
		prev = edev;
		if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
			break;
	}
	if (edev)
		put_device(&edev->edev);
}

static void ses_intf_remove_enclosure(struct scsi_device *sdev)
{
	struct enclosure_device *edev;
	struct ses_device *ses_dev;

	/*  exact match to this enclosure */
	edev = enclosure_find(&sdev->sdev_gendev, NULL);
	if (!edev)
		return;

	ses_dev = edev->scratch;
	edev->scratch = NULL;

	kfree(ses_dev->page10);
	kfree(ses_dev->page1);
	kfree(ses_dev->page2);
	kfree(ses_dev);

	kfree(edev->component[0].scratch);

	put_device(&edev->edev);
	enclosure_unregister(edev);
}

static void ses_intf_remove(struct device *cdev,
			    struct class_interface *intf)
{
	struct scsi_device *sdev = to_scsi_device(cdev->parent);

	if (!scsi_device_enclosure(sdev))
		ses_intf_remove_component(sdev);
	else
		ses_intf_remove_enclosure(sdev);
}

static struct class_interface ses_interface = {
	.add_dev	= ses_intf_add,
	.remove_dev	= ses_intf_remove,
};

static struct scsi_driver ses_template = {
	.owner			= THIS_MODULE,
	.gendrv = {
		.name		= "ses",
		.probe		= ses_probe,
		.remove		= ses_remove,
	},
};

static int __init ses_init(void)
{
	int err;

	err = scsi_register_interface(&ses_interface);
	if (err)
		return err;

	err = scsi_register_driver(&ses_template.gendrv);
	if (err)
		goto out_unreg;

	return 0;

 out_unreg:
	scsi_unregister_interface(&ses_interface);
	return err;
}

static void __exit ses_exit(void)
{
	scsi_unregister_driver(&ses_template.gendrv);
	scsi_unregister_interface(&ses_interface);
}

module_init(ses_init);
module_exit(ses_exit);

MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);

MODULE_AUTHOR("James Bottomley");
MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
9927c688 JB	1	/*
	2	* SCSI Enclosure Services
	3	*
	4	* Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
	5	*
	6	**-----------------------------------------------------------------------------
	7	**
	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.
	11	**
	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.
	16	**
	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.
	20	**
	21	**-----------------------------------------------------------------------------
	22	*/
	23
5a0e3ad6	24	#include <linux/slab.h>
9927c688 JB	25	#include <linux/module.h>
	26	#include <linux/kernel.h>
	27	#include <linux/enclosure.h>
	28
	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>
	35
	36	struct ses_device {
691b4773	37	unsigned char *page1;
8c3adc79	38	unsigned char *page1_types;
691b4773 YL	39	unsigned char *page2;
691b4773 YL	40	unsigned char *page10;
9927c688	41	short page1_len;
8c3adc79	42	short page1_num_types;
9927c688 JB	43	short page2_len;
	44	short page10_len;
	45	};
	46
	47	struct ses_component {
	48	u64 addr;
	49	unsigned char *desc;
	50	};
	51
	52	static int ses_probe(struct device *dev)
	53	{
	54	struct scsi_device *sdev = to_scsi_device(dev);
	55	int err = -ENODEV;
	56
	57	if (sdev->type != TYPE_ENCLOSURE)
	58	goto out;
	59
	60	err = 0;
	61	sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
	62
	63	out:
	64	return err;
	65	}
	66
c95e62ce	67	#define SES_TIMEOUT (30 * HZ)
9927c688 JB	68	#define SES_RETRIES 3
	69
	70	static int ses_recv_diag(struct scsi_device *sdev, int page_code,
	71	void *buf, int bufflen)
	72	{
691b4773	73	unsigned char cmd[] = {
9927c688 JB	74	RECEIVE_DIAGNOSTIC,
	75	1, /* Set PCV bit */
	76	page_code,
	77	bufflen >> 8,
	78	bufflen & 0xff,
	79	0
	80	};
	81
	82	return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
f4f4e47e	83	NULL, SES_TIMEOUT, SES_RETRIES, NULL);
9927c688 JB	84	}
	85
	86	static int ses_send_diag(struct scsi_device *sdev, int page_code,
	87	void *buf, int bufflen)
	88	{
	89	u32 result;
	90
691b4773	91	unsigned char cmd[] = {
9927c688 JB	92	SEND_DIAGNOSTIC,
	93	0x10, /* Set PF bit */
	94	0,
	95	bufflen >> 8,
	96	bufflen & 0xff,
	97	0
	98	};
	99
	100	result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
f4f4e47e	101	NULL, SES_TIMEOUT, SES_RETRIES, NULL);
9927c688 JB	102	if (result)
	103	sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
	104	result);
	105	return result;
	106	}
	107
	108	static int ses_set_page2_descriptor(struct enclosure_device *edev,
	109	struct enclosure_component *ecomp,
691b4773	110	unsigned char *desc)
9927c688 JB	111	{
9927c688 JB	112	int i, j, count = 0, descriptor = ecomp->number;
ee959b00	113	struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
9927c688	114	struct ses_device *ses_dev = edev->scratch;
8c3adc79	115	unsigned char *type_ptr = ses_dev->page1_types;
691b4773	116	unsigned char *desc_ptr = ses_dev->page2 + 8;
9927c688 JB	117
	118	/* Clear everything */
	119	memset(desc_ptr, 0, ses_dev->page2_len - 8);
8c3adc79	120	for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
9927c688 JB	121	for (j = 0; j < type_ptr[1]; j++) {
	122	desc_ptr += 4;
	123	if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
	124	type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
	125	continue;
	126	if (count++ == descriptor) {
	127	memcpy(desc_ptr, desc, 4);
	128	/* set select */
	129	desc_ptr[0] \|= 0x80;
	130	/* clear reserved, just in case */
	131	desc_ptr[0] &= 0xf0;
	132	}
	133	}
	134	}
	135
	136	return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
	137	}
	138
691b4773	139	static unsigned char ses_get_page2_descriptor(struct enclosure_device edev,
9927c688 JB	140	struct enclosure_component *ecomp)
	141	{
	142	int i, j, count = 0, descriptor = ecomp->number;
ee959b00	143	struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
9927c688	144	struct ses_device *ses_dev = edev->scratch;
8c3adc79	145	unsigned char *type_ptr = ses_dev->page1_types;
691b4773	146	unsigned char *desc_ptr = ses_dev->page2 + 8;
9927c688 JB	147
	148	ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
	149
8c3adc79	150	for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
9927c688 JB	151	for (j = 0; j < type_ptr[1]; j++) {
	152	desc_ptr += 4;
	153	if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
	154	type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
	155	continue;
	156	if (count++ == descriptor)
	157	return desc_ptr;
	158	}
	159	}
	160	return NULL;
	161	}
	162
	163	static void ses_get_fault(struct enclosure_device *edev,
	164	struct enclosure_component *ecomp)
	165	{
691b4773	166	unsigned char *desc;
9927c688 JB	167
9927c688 JB	168	desc = ses_get_page2_descriptor(edev, ecomp);
691b4773 YL	169	if (desc)
691b4773 YL	170	ecomp->fault = (desc[3] & 0x60) >> 4;
9927c688 JB	171	}
	172
	173	static int ses_set_fault(struct enclosure_device *edev,
	174	struct enclosure_component *ecomp,
	175	enum enclosure_component_setting val)
	176	{
691b4773	177	unsigned char desc[4] = {0 };
9927c688 JB	178
	179	switch (val) {
	180	case ENCLOSURE_SETTING_DISABLED:
	181	/* zero is disabled */
	182	break;
	183	case ENCLOSURE_SETTING_ENABLED:
	184	desc[2] = 0x02;
	185	break;
	186	default:
	187	/* SES doesn't do the SGPIO blink settings */
	188	return -EINVAL;
	189	}
	190
	191	return ses_set_page2_descriptor(edev, ecomp, desc);
	192	}
	193
	194	static void ses_get_status(struct enclosure_device *edev,
	195	struct enclosure_component *ecomp)
	196	{
691b4773	197	unsigned char *desc;
9927c688 JB	198
9927c688 JB	199	desc = ses_get_page2_descriptor(edev, ecomp);
691b4773 YL	200	if (desc)
691b4773 YL	201	ecomp->status = (desc[0] & 0x0f);
9927c688 JB	202	}
	203
	204	static void ses_get_locate(struct enclosure_device *edev,
	205	struct enclosure_component *ecomp)
	206	{
691b4773	207	unsigned char *desc;
9927c688 JB	208
9927c688 JB	209	desc = ses_get_page2_descriptor(edev, ecomp);
691b4773 YL	210	if (desc)
691b4773 YL	211	ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
9927c688 JB	212	}
	213
	214	static int ses_set_locate(struct enclosure_device *edev,
	215	struct enclosure_component *ecomp,
	216	enum enclosure_component_setting val)
	217	{
691b4773	218	unsigned char desc[4] = {0 };
9927c688 JB	219
	220	switch (val) {
	221	case ENCLOSURE_SETTING_DISABLED:
	222	/* zero is disabled */
	223	break;
	224	case ENCLOSURE_SETTING_ENABLED:
	225	desc[2] = 0x02;
	226	break;
	227	default:
	228	/* SES doesn't do the SGPIO blink settings */
	229	return -EINVAL;
	230	}
	231	return ses_set_page2_descriptor(edev, ecomp, desc);
	232	}
	233
	234	static int ses_set_active(struct enclosure_device *edev,
	235	struct enclosure_component *ecomp,
	236	enum enclosure_component_setting val)
	237	{
691b4773	238	unsigned char desc[4] = {0 };
9927c688 JB	239
	240	switch (val) {
	241	case ENCLOSURE_SETTING_DISABLED:
	242	/* zero is disabled */
	243	ecomp->active = 0;
	244	break;
	245	case ENCLOSURE_SETTING_ENABLED:
	246	desc[2] = 0x80;
	247	ecomp->active = 1;
	248	break;
	249	default:
	250	/* SES doesn't do the SGPIO blink settings */
	251	return -EINVAL;
	252	}
	253	return ses_set_page2_descriptor(edev, ecomp, desc);
	254	}
	255
	256	static struct enclosure_component_callbacks ses_enclosure_callbacks = {
	257	.get_fault = ses_get_fault,
	258	.set_fault = ses_set_fault,
	259	.get_status = ses_get_status,
	260	.get_locate = ses_get_locate,
	261	.set_locate = ses_set_locate,
	262	.set_active = ses_set_active,
	263	};
	264
	265	struct ses_host_edev {
	266	struct Scsi_Host *shost;
	267	struct enclosure_device *edev;
	268	};
	269
e0aae1a5	270	#if 0
9927c688 JB	271	int ses_match_host(struct enclosure_device edev, void data)
	272	{
	273	struct ses_host_edev *sed = data;
	274	struct scsi_device *sdev;
	275
ee959b00	276	if (!scsi_is_sdev_device(edev->edev.parent))
9927c688 JB	277	return 0;
9927c688 JB	278
ee959b00	279	sdev = to_scsi_device(edev->edev.parent);
9927c688 JB	280
	281	if (sdev->host != sed->shost)
	282	return 0;
	283
	284	sed->edev = edev;
	285	return 1;
	286	}
e0aae1a5	287	#endif /* 0 */
9927c688 JB	288
	289	static void ses_process_descriptor(struct enclosure_component *ecomp,
	290	unsigned char *desc)
	291	{
	292	int eip = desc[0] & 0x10;
	293	int invalid = desc[0] & 0x80;
	294	enum scsi_protocol proto = desc[0] & 0x0f;
	295	u64 addr = 0;
	296	struct ses_component *scomp = ecomp->scratch;
	297	unsigned char *d;
	298
	299	scomp->desc = desc;
	300
	301	if (invalid)
	302	return;
	303
	304	switch (proto) {
	305	case SCSI_PROTOCOL_SAS:
	306	if (eip)
	307	d = desc + 8;
	308	else
	309	d = desc + 4;
	310	/* only take the phy0 addr */
	311	addr = (u64)d[12] << 56 \|
	312	(u64)d[13] << 48 \|
	313	(u64)d[14] << 40 \|
	314	(u64)d[15] << 32 \|
	315	(u64)d[16] << 24 \|
	316	(u64)d[17] << 16 \|
	317	(u64)d[18] << 8 \|
	318	(u64)d[19];
	319	break;
	320	default:
	321	/* FIXME: Need to add more protocols than just SAS */
	322	break;
	323	}
	324	scomp->addr = addr;
	325	}
	326
	327	struct efd {
	328	u64 addr;
	329	struct device *dev;
	330	};
	331
	332	static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
	333	void *data)
	334	{
	335	struct efd *efd = data;
	336	int i;
	337	struct ses_component *scomp;
	338
	339	if (!edev->component[0].scratch)
	340	return 0;
	341
	342	for (i = 0; i < edev->components; i++) {
	343	scomp = edev->component[i].scratch;
	344	if (scomp->addr != efd->addr)
	345	continue;
	346
	347	enclosure_add_device(edev, i, efd->dev);
	348	return 1;
	349	}
	350	return 0;
	351	}
352
21fab1d0 JB	353	#define INIT_ALLOC_SIZE 32
	354
	355	static void ses_enclosure_data_process(struct enclosure_device *edev,
	356	struct scsi_device *sdev,
	357	int create)
	358	{
	359	u32 result;
	360	unsigned char buf = NULL, type_ptr, desc_ptr, addl_desc_ptr = NULL;
	361	int i, j, page7_len, len, components;
	362	struct ses_device *ses_dev = edev->scratch;
8c3adc79	363	int types = ses_dev->page1_num_types;
21fab1d0 JB	364	unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
	365
	366	if (!hdr_buf)
	367	goto simple_populate;
	368
	369	/* re-read page 10 */
	370	if (ses_dev->page10)
	371	ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
	372	/* Page 7 for the descriptors is optional */
	373	result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
	374	if (result)
	375	goto simple_populate;
	376
	377	page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
	378	/* add 1 for trailing '\0' we'll use */
	379	buf = kzalloc(len + 1, GFP_KERNEL);
	380	if (!buf)
	381	goto simple_populate;
	382	result = ses_recv_diag(sdev, 7, buf, len);
	383	if (result) {
	384	simple_populate:
	385	kfree(buf);
	386	buf = NULL;
	387	desc_ptr = NULL;
	388	len = 0;
	389	page7_len = 0;
	390	} else {
	391	desc_ptr = buf + 8;
	392	len = (desc_ptr[2] << 8) + desc_ptr[3];
	393	/* skip past overall descriptor */
	394	desc_ptr += len + 4;
21fab1d0	395	}
877a5597 JH	396	if (ses_dev->page10)
877a5597 JH	397	addl_desc_ptr = ses_dev->page10 + 8;
8c3adc79	398	type_ptr = ses_dev->page1_types;
21fab1d0 JB	399	components = 0;
	400	for (i = 0; i < types; i++, type_ptr += 4) {
	401	for (j = 0; j < type_ptr[1]; j++) {
	402	char *name = NULL;
	403	struct enclosure_component *ecomp;
	404
	405	if (desc_ptr) {
	406	if (desc_ptr >= buf + page7_len) {
	407	desc_ptr = NULL;
	408	} else {
	409	len = (desc_ptr[2] << 8) + desc_ptr[3];
	410	desc_ptr += 4;
	411	/* Add trailing zero - pushes into
	412	* reserved space */
	413	desc_ptr[len] = '\0';
	414	name = desc_ptr;
	415	}
	416	}
	417	if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE \|\|
	418	type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
	419
	420	if (create)
	421	ecomp = enclosure_component_register(edev,
	422	components++,
	423	type_ptr[0],
	424	name);
	425	else
	426	ecomp = &edev->component[components++];
	427
	428	if (!IS_ERR(ecomp) && addl_desc_ptr)
	429	ses_process_descriptor(ecomp,
	430	addl_desc_ptr);
	431	}
	432	if (desc_ptr)
	433	desc_ptr += len;
	434
	435	if (addl_desc_ptr)
	436	addl_desc_ptr += addl_desc_ptr[1] + 2;
	437
	438	}
	439	}
	440	kfree(buf);
	441	kfree(hdr_buf);
	442	}
	443
9927c688 JB	444	static void ses_match_to_enclosure(struct enclosure_device *edev,
	445	struct scsi_device *sdev)
	446	{
40c3460f	447	unsigned char *buf;
9927c688	448	unsigned char *desc;
40c3460f	449	unsigned int vpd_len;
9927c688 JB	450	struct efd efd = {
	451	.addr = 0,
	452	};
9927c688	453
e3deec09 JB	454	buf = kmalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
	455	if (!buf \|\| scsi_get_vpd_page(sdev, 0x83, buf, INIT_ALLOC_SIZE))
	456	goto free;
9927c688	457
21fab1d0 JB	458	ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
21fab1d0 JB	459
40c3460f	460	vpd_len = ((buf[2] << 8) \| buf[3]) + 4;
e3deec09 JB	461	kfree(buf);
	462	buf = kmalloc(vpd_len, GFP_KERNEL);
	463	if (!buf \|\|scsi_get_vpd_page(sdev, 0x83, buf, vpd_len))
	464	goto free;
671a99c8	465
9927c688	466	desc = buf + 4;
671a99c8	467	while (desc < buf + vpd_len) {
9927c688 JB	468	enum scsi_protocol proto = desc[0] >> 4;
	469	u8 code_set = desc[0] & 0x0f;
	470	u8 piv = desc[1] & 0x80;
	471	u8 assoc = (desc[1] & 0x30) >> 4;
	472	u8 type = desc[1] & 0x0f;
	473	u8 len = desc[3];
	474
b3f1f9aa	475	if (piv && code_set == 1 && assoc == 1
9927c688 JB	476	&& proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
	477	efd.addr = (u64)desc[4] << 56 \|
	478	(u64)desc[5] << 48 \|
	479	(u64)desc[6] << 40 \|
	480	(u64)desc[7] << 32 \|
	481	(u64)desc[8] << 24 \|
	482	(u64)desc[9] << 16 \|
	483	(u64)desc[10] << 8 \|
	484	(u64)desc[11];
	485
	486	desc += len + 4;
	487	}
	488	if (!efd.addr)
	489	goto free;
	490
	491	efd.dev = &sdev->sdev_gendev;
	492
	493	enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
	494	free:
	495	kfree(buf);
	496	}
	497
ee959b00	498	static int ses_intf_add(struct device *cdev,
9927c688 JB	499	struct class_interface *intf)
9927c688 JB	500	{
ee959b00	501	struct scsi_device *sdev = to_scsi_device(cdev->parent);
9927c688	502	struct scsi_device *tmp_sdev;
21fab1d0	503	unsigned char buf = NULL, hdr_buf, *type_ptr;
9927c688 JB	504	struct ses_device *ses_dev;
9927c688 JB	505	u32 result;
21fab1d0	506	int i, types, len, components = 0;
9927c688	507	int err = -ENOMEM;
8c3adc79	508	int num_enclosures;
9927c688	509	struct enclosure_device *edev;
7c46c20a	510	struct ses_component *scomp = NULL;
9927c688 JB	511
	512	if (!scsi_device_enclosure(sdev)) {
	513	/* not an enclosure, but might be in one */
163f52b6 JB	514	struct enclosure_device *prev = NULL;
	515
	516	while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
9927c688	517	ses_match_to_enclosure(edev, sdev);
163f52b6	518	prev = edev;
9927c688 JB	519	}
	520	return -ENODEV;
	521	}
	522
	523	/* TYPE_ENCLOSURE prints a message in probe */
	524	if (sdev->type != TYPE_ENCLOSURE)
	525	sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
	526
	527	ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
	528	hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
	529	if (!hdr_buf \|\| !ses_dev)
	530	goto err_init_free;
	531
	532	result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
	533	if (result)
	534	goto recv_failed;
	535
9927c688 JB	536	len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
	537	buf = kzalloc(len, GFP_KERNEL);
	538	if (!buf)
	539	goto err_free;
	540
9927c688 JB	541	result = ses_recv_diag(sdev, 1, buf, len);
	542	if (result)
	543	goto recv_failed;
	544
8c3adc79	545	types = 0;
9927c688	546
8c3adc79 JB	547	/* we always have one main enclosure and the rest are referred
	548	* to as secondary subenclosures */
	549	num_enclosures = buf[1] + 1;
9927c688	550
8c3adc79 JB	551	/* begin at the enclosure descriptor */
	552	type_ptr = buf + 8;
	553	/* skip all the enclosure descriptors */
	554	for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
	555	types += type_ptr[2];
	556	type_ptr += type_ptr[3] + 4;
	557	}
	558
	559	ses_dev->page1_types = type_ptr;
	560	ses_dev->page1_num_types = types;
	561
	562	for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
9927c688 JB	563	if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE \|\|
	564	type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
	565	components += type_ptr[1];
	566	}
7c46c20a YL	567	ses_dev->page1 = buf;
	568	ses_dev->page1_len = len;
	569	buf = NULL;
9927c688 JB	570
	571	result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
	572	if (result)
	573	goto recv_failed;
	574
	575	len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
	576	buf = kzalloc(len, GFP_KERNEL);
	577	if (!buf)
	578	goto err_free;
	579
	580	/* make sure getting page 2 actually works */
	581	result = ses_recv_diag(sdev, 2, buf, len);
	582	if (result)
	583	goto recv_failed;
	584	ses_dev->page2 = buf;
	585	ses_dev->page2_len = len;
7c46c20a	586	buf = NULL;
9927c688 JB	587
	588	/* The additional information page --- allows us
	589	* to match up the devices */
	590	result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
691b4773 YL	591	if (!result) {
	592
	593	len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
	594	buf = kzalloc(len, GFP_KERNEL);
	595	if (!buf)
	596	goto err_free;
	597
	598	result = ses_recv_diag(sdev, 10, buf, len);
	599	if (result)
	600	goto recv_failed;
	601	ses_dev->page10 = buf;
	602	ses_dev->page10_len = len;
	603	buf = NULL;
	604	}
7c46c20a	605	scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
9927c688	606	if (!scomp)
7c46c20a	607	goto err_free;
9927c688	608
71610f55	609	edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
9927c688 JB	610	components, &ses_enclosure_callbacks);
	611	if (IS_ERR(edev)) {
	612	err = PTR_ERR(edev);
	613	goto err_free;
	614	}
	615
9b3a6549 JL	616	kfree(hdr_buf);
9b3a6549 JL	617
9927c688 JB	618	edev->scratch = ses_dev;
9927c688 JB	619	for (i = 0; i < components; i++)
7c46c20a	620	edev->component[i].scratch = scomp + i;
9927c688	621
21fab1d0	622	ses_enclosure_data_process(edev, sdev, 1);
9927c688 JB	623
	624	/* see if there are any devices matching before
	625	* we found the enclosure */
	626	shost_for_each_device(tmp_sdev, sdev->host) {
	627	if (tmp_sdev->lun != 0 \|\| scsi_device_enclosure(tmp_sdev))
	628	continue;
	629	ses_match_to_enclosure(edev, tmp_sdev);
	630	}
	631
	632	return 0;
	633
	634	recv_failed:
	635	sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
	636	result);
	637	err = -ENODEV;
	638	err_free:
	639	kfree(buf);
7c46c20a	640	kfree(scomp);
9927c688 JB	641	kfree(ses_dev->page10);
	642	kfree(ses_dev->page2);
	643	kfree(ses_dev->page1);
	644	err_init_free:
	645	kfree(ses_dev);
	646	kfree(hdr_buf);
	647	sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
	648	return err;
	649	}
	650
	651	static int ses_remove(struct device *dev)
	652	{
	653	return 0;
	654	}
	655
43d8eb9c JB	656	static void ses_intf_remove_component(struct scsi_device *sdev)
	657	{
	658	struct enclosure_device edev, prev = NULL;
	659
	660	while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
	661	prev = edev;
	662	if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
	663	break;
	664	}
	665	if (edev)
	666	put_device(&edev->edev);
	667	}
	668
	669	static void ses_intf_remove_enclosure(struct scsi_device *sdev)
9927c688	670	{
9927c688 JB	671	struct enclosure_device *edev;
	672	struct ses_device *ses_dev;
	673
163f52b6	674	/* exact match to this enclosure */
43d8eb9c	675	edev = enclosure_find(&sdev->sdev_gendev, NULL);
9927c688 JB	676	if (!edev)
	677	return;
	678
	679	ses_dev = edev->scratch;
	680	edev->scratch = NULL;
	681
7c46c20a	682	kfree(ses_dev->page10);
9927c688 JB	683	kfree(ses_dev->page1);
	684	kfree(ses_dev->page2);
	685	kfree(ses_dev);
	686
	687	kfree(edev->component[0].scratch);
	688
ee959b00	689	put_device(&edev->edev);
9927c688 JB	690	enclosure_unregister(edev);
	691	}
	692
43d8eb9c JB	693	static void ses_intf_remove(struct device *cdev,
	694	struct class_interface *intf)
	695	{
	696	struct scsi_device *sdev = to_scsi_device(cdev->parent);
	697
	698	if (!scsi_device_enclosure(sdev))
	699	ses_intf_remove_component(sdev);
	700	else
	701	ses_intf_remove_enclosure(sdev);
	702	}
	703
9927c688	704	static struct class_interface ses_interface = {
ee959b00 TJ	705	.add_dev = ses_intf_add,
ee959b00 TJ	706	.remove_dev = ses_intf_remove,
9927c688 JB	707	};
	708
	709	static struct scsi_driver ses_template = {
	710	.owner = THIS_MODULE,
	711	.gendrv = {
	712	.name = "ses",
	713	.probe = ses_probe,
	714	.remove = ses_remove,
	715	},
	716	};
	717
	718	static int __init ses_init(void)
	719	{
	720	int err;
	721
	722	err = scsi_register_interface(&ses_interface);
	723	if (err)
	724	return err;
	725
	726	err = scsi_register_driver(&ses_template.gendrv);
	727	if (err)
	728	goto out_unreg;
	729
	730	return 0;
	731
	732	out_unreg:
	733	scsi_unregister_interface(&ses_interface);
	734	return err;
	735	}
	736
	737	static void __exit ses_exit(void)
	738	{
	739	scsi_unregister_driver(&ses_template.gendrv);
	740	scsi_unregister_interface(&ses_interface);
	741	}
	742
	743	module_init(ses_init);
	744	module_exit(ses_exit);
	745
	746	MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
	747
	748	MODULE_AUTHOR("James Bottomley");
	749	MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
	750	MODULE_LICENSE("GPL v2");