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Commit 65c92b09 authored by James Bottomley's avatar James Bottomley Committed by James Bottomley
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[SCSI] scsi_transport_sas: introduce a sas_port entity 



this patch introduces a port object, separates out ports and phys,
with ports becoming the primary objects of the tree.

Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 2076eb6a

drivers/scsi/scsi_sas_internal.h

+7 −3
Original line number Diff line number Diff line
@@ -2,7 +2,8 @@ 
#define _SCSI_SAS_INTERNAL_H



#define SAS_HOST_ATTRS		0

#define SAS_PORT_ATTRS		17

#define SAS_PHY_ATTRS		17

#define SAS_PORT_ATTRS		1

#define SAS_RPORT_ATTRS		7

#define SAS_END_DEV_ATTRS	3

#define SAS_EXPANDER_ATTRS	7
@@ -13,12 +14,14 @@ struct sas_internal { 
	struct sas_domain_function_template *dft;



	struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS];

	struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS];

	struct class_device_attribute private_phy_attrs[SAS_PHY_ATTRS];

	struct class_device_attribute private_port_attrs[SAS_PORT_ATTRS];

	struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS];

	struct class_device_attribute private_end_dev_attrs[SAS_END_DEV_ATTRS];

	struct class_device_attribute private_expander_attrs[SAS_EXPANDER_ATTRS];



	struct transport_container phy_attr_cont;

	struct transport_container port_attr_cont;

	struct transport_container rphy_attr_cont;

	struct transport_container end_dev_attr_cont;

	struct transport_container expander_attr_cont;
@@ -28,7 +31,8 @@ struct sas_internal { 
	 * needed by scsi_sysfs.c

	 */

	struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1];

	struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1];

	struct class_device_attribute *phy_attrs[SAS_PHY_ATTRS + 1];

	struct class_device_attribute *port_attrs[SAS_PORT_ATTRS + 1];

	struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1];

	struct class_device_attribute *end_dev_attrs[SAS_END_DEV_ATTRS + 1];

	struct class_device_attribute *expander_attrs[SAS_EXPANDER_ATTRS + 1];

drivers/scsi/scsi_transport_sas.c

+333 −38
Original line number Diff line number Diff line
@@ -174,11 +174,28 @@ static int sas_host_match(struct attribute_container *cont, 


static int do_sas_phy_delete(struct device *dev, void *data)

{

	if (scsi_is_sas_phy(dev))

	int pass = (int)(unsigned long)data;



	if (pass == 0 && scsi_is_sas_port(dev))

		sas_port_delete(dev_to_sas_port(dev));

	else if (pass == 1 && scsi_is_sas_phy(dev))

		sas_phy_delete(dev_to_phy(dev));

	return 0;

}



/**

 * sas_remove_children  --  tear down a devices SAS data structures

 * @dev:	device belonging to the sas object

 *

 * Removes all SAS PHYs and remote PHYs for a given object

 */

void sas_remove_children(struct device *dev)

{

	device_for_each_child(dev, (void *)0, do_sas_phy_delete);

	device_for_each_child(dev, (void *)1, do_sas_phy_delete);

}

EXPORT_SYMBOL(sas_remove_children);



/**

 * sas_remove_host  --  tear down a Scsi_Host's SAS data structures

 * @shost:	Scsi Host that is torn down
@@ -188,13 +205,13 @@ static int do_sas_phy_delete(struct device *dev, void *data) 
 */

void sas_remove_host(struct Scsi_Host *shost)

{

	device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);

	sas_remove_children(&shost->shost_gendev);

}

EXPORT_SYMBOL(sas_remove_host);





/*

 * SAS Port attributes

 * SAS Phy attributes

 */



#define sas_phy_show_simple(field, name, format_string, cast)		\
@@ -310,7 +327,7 @@ sas_phy_protocol_attr(identify.target_port_protocols, 
sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",

		unsigned long long);

sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);

sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);

//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);

sas_phy_linkspeed_attr(negotiated_linkrate);

sas_phy_linkspeed_attr(minimum_linkrate_hw);

sas_phy_linkspeed_attr(minimum_linkrate);
@@ -378,9 +395,10 @@ struct sas_phy *sas_phy_alloc(struct device *parent, int number) 
	device_initialize(&phy->dev);

	phy->dev.parent = get_device(parent);

	phy->dev.release = sas_phy_release;

	INIT_LIST_HEAD(&phy->port_siblings);

	if (scsi_is_sas_expander_device(parent)) {

		struct sas_rphy *rphy = dev_to_rphy(parent);

		sprintf(phy->dev.bus_id, "phy-%d-%d:%d", shost->host_no,

		sprintf(phy->dev.bus_id, "phy-%d:%d:%d", shost->host_no,

			rphy->scsi_target_id, number);

	} else

		sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
@@ -440,8 +458,8 @@ sas_phy_delete(struct sas_phy *phy) 
{

	struct device *dev = &phy->dev;



	if (phy->rphy)

		sas_rphy_delete(phy->rphy);

	/* this happens if the phy is still part of a port when deleted */

	BUG_ON(!list_empty(&phy->port_siblings));



	transport_remove_device(dev);

	device_del(dev);
@@ -463,6 +481,258 @@ int scsi_is_sas_phy(const struct device *dev) 
}

EXPORT_SYMBOL(scsi_is_sas_phy);



/*

 * SAS Port attributes

 */

#define sas_port_show_simple(field, name, format_string, cast)		\

static ssize_t								\

show_sas_port_##name(struct class_device *cdev, char *buf)		\

{									\

	struct sas_port *port = transport_class_to_sas_port(cdev);	\

									\

	return snprintf(buf, 20, format_string, cast port->field);	\

}



#define sas_port_simple_attr(field, name, format_string, type)		\

	sas_port_show_simple(field, name, format_string, (type))	\

static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)



sas_port_simple_attr(num_phys, num_phys, "%d\n", int);



static DECLARE_TRANSPORT_CLASS(sas_port_class,

			       "sas_port", NULL, NULL, NULL);



static int sas_port_match(struct attribute_container *cont, struct device *dev)

{

	struct Scsi_Host *shost;

	struct sas_internal *i;



	if (!scsi_is_sas_port(dev))

		return 0;

	shost = dev_to_shost(dev->parent);



	if (!shost->transportt)

		return 0;

	if (shost->transportt->host_attrs.ac.class !=

			&sas_host_class.class)

		return 0;



	i = to_sas_internal(shost->transportt);

	return &i->port_attr_cont.ac == cont;

}





static void sas_port_release(struct device *dev)

{

	struct sas_port *port = dev_to_sas_port(dev);



	BUG_ON(!list_empty(&port->phy_list));



	put_device(dev->parent);

	kfree(port);

}



static void sas_port_create_link(struct sas_port *port,

				 struct sas_phy *phy)

{

	sysfs_create_link(&port->dev.kobj, &phy->dev.kobj, phy->dev.bus_id);

	sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");

}



static void sas_port_delete_link(struct sas_port *port,

				 struct sas_phy *phy)

{

	sysfs_remove_link(&port->dev.kobj, phy->dev.bus_id);

	sysfs_remove_link(&phy->dev.kobj, "port");

}



/** sas_port_alloc - allocate and initialize a SAS port structure

 *

 * @parent:	parent device

 * @port_id:	port number

 *

 * Allocates a SAS port structure.  It will be added to the device tree

 * below the device specified by @parent which must be either a Scsi_Host

 * or a sas_expander_device.

 *

 * Returns %NULL on error

 */

struct sas_port *sas_port_alloc(struct device *parent, int port_id)

{

	struct Scsi_Host *shost = dev_to_shost(parent);

	struct sas_port *port;



	port = kzalloc(sizeof(*port), GFP_KERNEL);

	if (!port)

		return NULL;



	port->port_identifier = port_id;



	device_initialize(&port->dev);



	port->dev.parent = get_device(parent);

	port->dev.release = sas_port_release;



	mutex_init(&port->phy_list_mutex);

	INIT_LIST_HEAD(&port->phy_list);



	if (scsi_is_sas_expander_device(parent)) {

		struct sas_rphy *rphy = dev_to_rphy(parent);

		sprintf(port->dev.bus_id, "port-%d:%d:%d", shost->host_no,

			rphy->scsi_target_id, port->port_identifier);

	} else

		sprintf(port->dev.bus_id, "port-%d:%d", shost->host_no,

			port->port_identifier);



	transport_setup_device(&port->dev);



	return port;

}

EXPORT_SYMBOL(sas_port_alloc);



/**

 * sas_port_add - add a SAS port to the device hierarchy

 *

 * @port:	port to be added

 *

 * publishes a port to the rest of the system

 */

int sas_port_add(struct sas_port *port)

{

	int error;



	/* No phys should be added until this is made visible */

	BUG_ON(!list_empty(&port->phy_list));



	error = device_add(&port->dev);



	if (error)

		return error;



	transport_add_device(&port->dev);

	transport_configure_device(&port->dev);



	return 0;

}

EXPORT_SYMBOL(sas_port_add);



/**

 * sas_port_free  --  free a SAS PORT

 * @port:	SAS PORT to free

 *

 * Frees the specified SAS PORT.

 *

 * Note:

 *   This function must only be called on a PORT that has not

 *   sucessfully been added using sas_port_add().

 */

void sas_port_free(struct sas_port *port)

{

	transport_destroy_device(&port->dev);

	put_device(&port->dev);

}

EXPORT_SYMBOL(sas_port_free);



/**

 * sas_port_delete  --  remove SAS PORT

 * @port:	SAS PORT to remove

 *

 * Removes the specified SAS PORT.  If the SAS PORT has an

 * associated phys, unlink them from the port as well.

 */

void sas_port_delete(struct sas_port *port)

{

	struct device *dev = &port->dev;

	struct sas_phy *phy, *tmp_phy;



	if (port->rphy) {

		sas_rphy_delete(port->rphy);

		port->rphy = NULL;

	}



	mutex_lock(&port->phy_list_mutex);

	list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,

				 port_siblings) {

		sas_port_delete_link(port, phy);

		list_del_init(&phy->port_siblings);

	}

	mutex_unlock(&port->phy_list_mutex);



	transport_remove_device(dev);

	device_del(dev);

	transport_destroy_device(dev);

	put_device(dev);

}

EXPORT_SYMBOL(sas_port_delete);



/**

 * scsi_is_sas_port --  check if a struct device represents a SAS port

 * @dev:	device to check

 *

 * Returns:

 *	%1 if the device represents a SAS Port, %0 else

 */

int scsi_is_sas_port(const struct device *dev)

{

	return dev->release == sas_port_release;

}

EXPORT_SYMBOL(scsi_is_sas_port);



/**

 * sas_port_add_phy - add another phy to a port to form a wide port

 * @port:	port to add the phy to

 * @phy:	phy to add

 *

 * When a port is initially created, it is empty (has no phys).  All

 * ports must have at least one phy to operated, and all wide ports

 * must have at least two.  The current code makes no difference

 * between ports and wide ports, but the only object that can be

 * connected to a remote device is a port, so ports must be formed on

 * all devices with phys if they're connected to anything.

 */

void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)

{

	mutex_lock(&port->phy_list_mutex);

	if (unlikely(!list_empty(&phy->port_siblings))) {

		/* make sure we're already on this port */

		struct sas_phy *tmp;



		list_for_each_entry(tmp, &port->phy_list, port_siblings)

			if (tmp == phy)

				break;

		/* If this trips, you added a phy that was already

		 * part of a different port */

		if (unlikely(tmp != phy)) {

			dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", phy->dev.bus_id);

			BUG();

		}

	} else {

		sas_port_create_link(port, phy);

		list_add_tail(&phy->port_siblings, &port->phy_list);

		port->num_phys++;

	}

	mutex_unlock(&port->phy_list_mutex);

}

EXPORT_SYMBOL(sas_port_add_phy);



/**

 * sas_port_delete_phy - remove a phy from a port or wide port

 * @port:	port to remove the phy from

 * @phy:	phy to remove

 *

 * This operation is used for tearing down ports again.  It must be

 * done to every port or wide port before calling sas_port_delete.

 */

void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)

{

	mutex_lock(&port->phy_list_mutex);

	sas_port_delete_link(port, phy);

	list_del_init(&phy->port_siblings);

	port->num_phys--;

	mutex_unlock(&port->phy_list_mutex);

}

EXPORT_SYMBOL(sas_port_delete_phy);



/*

 * SAS remote PHY attributes.

 */
@@ -767,7 +1037,7 @@ static void sas_rphy_initialize(struct sas_rphy *rphy) 
 * Returns:

 *	SAS PHY allocated or %NULL if the allocation failed.

 */

struct sas_rphy *sas_end_device_alloc(struct sas_phy *parent)

struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)

{

	struct Scsi_Host *shost = dev_to_shost(&parent->dev);

	struct sas_end_device *rdev;
@@ -780,8 +1050,13 @@ struct sas_rphy *sas_end_device_alloc(struct sas_phy *parent) 
	device_initialize(&rdev->rphy.dev);

	rdev->rphy.dev.parent = get_device(&parent->dev);

	rdev->rphy.dev.release = sas_end_device_release;

	sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d-%d",

		shost->host_no, parent->port_identifier, parent->number);

	if (scsi_is_sas_expander_device(parent->dev.parent)) {

		struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);

		sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d:%d",

			shost->host_no, rphy->scsi_target_id, parent->port_identifier);

	} else

		sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d",

			shost->host_no, parent->port_identifier);

	rdev->rphy.identify.device_type = SAS_END_DEVICE;

	sas_rphy_initialize(&rdev->rphy);

	transport_setup_device(&rdev->rphy.dev);
@@ -798,7 +1073,7 @@ EXPORT_SYMBOL(sas_end_device_alloc); 
 * Returns:

 *	SAS PHY allocated or %NULL if the allocation failed.

 */

struct sas_rphy *sas_expander_alloc(struct sas_phy *parent,

struct sas_rphy *sas_expander_alloc(struct sas_port *parent,

				    enum sas_device_type type)

{

	struct Scsi_Host *shost = dev_to_shost(&parent->dev);
@@ -837,7 +1112,7 @@ EXPORT_SYMBOL(sas_expander_alloc); 
 */

int sas_rphy_add(struct sas_rphy *rphy)

{

	struct sas_phy *parent = dev_to_phy(rphy->dev.parent);

	struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);

	struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);

	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);

	struct sas_identify *identify = &rphy->identify;
@@ -910,7 +1185,7 @@ void 
sas_rphy_delete(struct sas_rphy *rphy)

{

	struct device *dev = &rphy->dev;

	struct sas_phy *parent = dev_to_phy(dev->parent);

	struct sas_port *parent = dev_to_sas_port(dev->parent);

	struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);

	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
@@ -920,7 +1195,7 @@ sas_rphy_delete(struct sas_rphy *rphy) 
		break;

	case SAS_EDGE_EXPANDER_DEVICE:

	case SAS_FANOUT_EXPANDER_DEVICE:

		device_for_each_child(dev, NULL, do_sas_phy_delete);

		sas_remove_children(dev);

		break;

	default:

		break;
@@ -967,7 +1242,7 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel, 


	mutex_lock(&sas_host->lock);

	list_for_each_entry(rphy, &sas_host->rphy_list, list) {

		struct sas_phy *parent = dev_to_phy(rphy->dev.parent);

		struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);



		if (rphy->identify.device_type != SAS_END_DEVICE ||

		    rphy->scsi_target_id == -1)
@@ -1003,16 +1278,19 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel, 
#define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)			\

	SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)



#define SETUP_PORT_ATTRIBUTE(field)					\

#define SETUP_PHY_ATTRIBUTE(field)					\

	SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)



#define SETUP_OPTIONAL_PORT_ATTRIBUTE(field, func)			\

#define SETUP_PORT_ATTRIBUTE(field)					\

	SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)



#define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)			\

	SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)



#define SETUP_PORT_ATTRIBUTE_WRONLY(field)				\

#define SETUP_PHY_ATTRIBUTE_WRONLY(field)				\

	SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1)



#define SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(field, func)		\

#define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)		\

	SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func)



#define SETUP_END_DEV_ATTRIBUTE(field)					\
@@ -1048,6 +1326,11 @@ sas_attach_transport(struct sas_function_template *ft) 
	i->phy_attr_cont.ac.match = sas_phy_match;

	transport_container_register(&i->phy_attr_cont);



	i->port_attr_cont.ac.class = &sas_port_class.class;

	i->port_attr_cont.ac.attrs = &i->port_attrs[0];

	i->port_attr_cont.ac.match = sas_port_match;

	transport_container_register(&i->port_attr_cont);



	i->rphy_attr_cont.ac.class = &sas_rphy_class.class;

	i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];

	i->rphy_attr_cont.ac.match = sas_rphy_match;
@@ -1066,29 +1349,34 @@ sas_attach_transport(struct sas_function_template *ft) 
	i->f = ft;



	count = 0;

	SETUP_PORT_ATTRIBUTE(num_phys);

	i->host_attrs[count] = NULL;



	count = 0;

	SETUP_PORT_ATTRIBUTE(initiator_port_protocols);

	SETUP_PORT_ATTRIBUTE(target_port_protocols);

	SETUP_PORT_ATTRIBUTE(device_type);

	SETUP_PORT_ATTRIBUTE(sas_address);

	SETUP_PORT_ATTRIBUTE(phy_identifier);

	SETUP_PORT_ATTRIBUTE(port_identifier);

	SETUP_PORT_ATTRIBUTE(negotiated_linkrate);

	SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw);

	SETUP_PORT_ATTRIBUTE(minimum_linkrate);

	SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw);

	SETUP_PORT_ATTRIBUTE(maximum_linkrate);



	SETUP_PORT_ATTRIBUTE(invalid_dword_count);

	SETUP_PORT_ATTRIBUTE(running_disparity_error_count);

	SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count);

	SETUP_PORT_ATTRIBUTE(phy_reset_problem_count);

	SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(link_reset, phy_reset);

	SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(hard_reset, phy_reset);

	SETUP_PHY_ATTRIBUTE(initiator_port_protocols);

	SETUP_PHY_ATTRIBUTE(target_port_protocols);

	SETUP_PHY_ATTRIBUTE(device_type);

	SETUP_PHY_ATTRIBUTE(sas_address);

	SETUP_PHY_ATTRIBUTE(phy_identifier);

	//SETUP_PHY_ATTRIBUTE(port_identifier);

	SETUP_PHY_ATTRIBUTE(negotiated_linkrate);

	SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);

	SETUP_PHY_ATTRIBUTE(minimum_linkrate);

	SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);

	SETUP_PHY_ATTRIBUTE(maximum_linkrate);



	SETUP_PHY_ATTRIBUTE(invalid_dword_count);

	SETUP_PHY_ATTRIBUTE(running_disparity_error_count);

	SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);

	SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);

	SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);

	SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);

	i->phy_attrs[count] = NULL;



	count = 0;

	SETUP_PORT_ATTRIBUTE(num_phys);

	i->port_attrs[count] = NULL;



	count = 0;

	SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);

	SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
@@ -1131,6 +1419,7 @@ void sas_release_transport(struct scsi_transport_template *t) 


	transport_container_unregister(&i->t.host_attrs);

	transport_container_unregister(&i->phy_attr_cont);

	transport_container_unregister(&i->port_attr_cont);

	transport_container_unregister(&i->rphy_attr_cont);

	transport_container_unregister(&i->end_dev_attr_cont);

	transport_container_unregister(&i->expander_attr_cont);
@@ -1149,9 +1438,12 @@ static __init int sas_transport_init(void) 
	error = transport_class_register(&sas_phy_class);

	if (error)

		goto out_unregister_transport;

	error = transport_class_register(&sas_rphy_class);

	error = transport_class_register(&sas_port_class);

	if (error)

		goto out_unregister_phy;

	error = transport_class_register(&sas_rphy_class);

	if (error)

		goto out_unregister_port;

	error = transport_class_register(&sas_end_dev_class);

	if (error)

		goto out_unregister_rphy;
@@ -1165,6 +1457,8 @@ static __init int sas_transport_init(void) 
	transport_class_unregister(&sas_end_dev_class);

 out_unregister_rphy:

	transport_class_unregister(&sas_rphy_class);

 out_unregister_port:

	transport_class_unregister(&sas_port_class);

 out_unregister_phy:

	transport_class_unregister(&sas_phy_class);

 out_unregister_transport:
@@ -1178,6 +1472,7 @@ static void __exit sas_transport_exit(void) 
{

	transport_class_unregister(&sas_host_class);

	transport_class_unregister(&sas_phy_class);

	transport_class_unregister(&sas_port_class);

	transport_class_unregister(&sas_rphy_class);

	transport_class_unregister(&sas_end_dev_class);

	transport_class_unregister(&sas_expander_class);

include/scsi/scsi_transport_sas.h

+32 −5
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 


#include <linux/transport_class.h>

#include <linux/types.h>

#include <linux/mutex.h>



struct scsi_transport_template;

struct sas_rphy;
@@ -55,7 +56,6 @@ struct sas_phy { 
	enum sas_linkrate	minimum_linkrate;

	enum sas_linkrate	maximum_linkrate_hw;

	enum sas_linkrate	maximum_linkrate;

	u8			port_identifier;



	/* internal state */

	unsigned int		local_attached : 1;
@@ -66,8 +66,8 @@ struct sas_phy { 
	u32			loss_of_dword_sync_count;

	u32			phy_reset_problem_count;



	/* the other end of the link */

	struct sas_rphy		*rphy;

	/* for the list of phys belonging to a port */

	struct list_head	port_siblings;

};



#define dev_to_phy(d) \
@@ -124,6 +124,24 @@ struct sas_expander_device { 
#define rphy_to_expander_device(r) \

	container_of((r), struct sas_expander_device, rphy)



struct sas_port {

	struct device		dev;



	u8			port_identifier;

	int			num_phys;



	/* the other end of the link */

	struct sas_rphy		*rphy;



	struct mutex		phy_list_mutex;

	struct list_head	phy_list;

};



#define dev_to_sas_port(d) \

	container_of((d), struct sas_port, dev)

#define transport_class_to_sas_port(cdev) \

	dev_to_sas_port((cdev)->dev)



/* The functions by which the transport class and the driver communicate */

struct sas_function_template {

	int (*get_linkerrors)(struct sas_phy *);
@@ -133,6 +151,7 @@ struct sas_function_template { 
};





void sas_remove_children(struct device *);

extern void sas_remove_host(struct Scsi_Host *);



extern struct sas_phy *sas_phy_alloc(struct device *, int);
@@ -141,13 +160,21 @@ extern int sas_phy_add(struct sas_phy *); 
extern void sas_phy_delete(struct sas_phy *);

extern int scsi_is_sas_phy(const struct device *);



extern struct sas_rphy *sas_end_device_alloc(struct sas_phy *);

extern struct sas_rphy *sas_expander_alloc(struct sas_phy *, enum sas_device_type);

extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);

extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);

void sas_rphy_free(struct sas_rphy *);

extern int sas_rphy_add(struct sas_rphy *);

extern void sas_rphy_delete(struct sas_rphy *);

extern int scsi_is_sas_rphy(const struct device *);



struct sas_port *sas_port_alloc(struct device *, int);

int sas_port_add(struct sas_port *);

void sas_port_free(struct sas_port *);

void sas_port_delete(struct sas_port *);

void sas_port_add_phy(struct sas_port *, struct sas_phy *);

void sas_port_delete_phy(struct sas_port *, struct sas_phy *);

int scsi_is_sas_port(const struct device *);



extern struct scsi_transport_template *

sas_attach_transport(struct sas_function_template *);

extern void sas_release_transport(struct scsi_transport_template *);