[GitHub/mt8127/android_kernel_alcatel_ttab.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 *page2;
	unsigned char *page10;
	short page1_len;
	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 + 12 + ses_dev->page1[11];
	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[10]; 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 + 12 + ses_dev->page1[11];
	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[10]; 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[10];
	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 + 12 + ses_dev->page1[11];
	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;
	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;

	if (hdr_buf[1] != 0) {
		/* FIXME: need subenclosure support; I've just never
		 * seen a device with subenclosures and it makes the
		 * traversal routines more complex */
		sdev_printk(KERN_ERR, sdev,
			"FIXME driver has no support for subenclosures (%d)\n",
			hdr_buf[1]);
		goto err_free;
	}

	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 = buf[10];

	type_ptr = buf + 12 + buf[11];

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