linux/drivers/scsi/scsi_transport_sas.c
Moore, Eric e6bc863cf2 [SCSI] scsi_transport_sas: mapping the rphy channel equal to the port identifier
We will be mapping the RAID volumes in mptsas to a reserved
channel that
is one larger than the anticapated number of ports on the direct
attached host
adapter.

Signed-off-by: Eric Moore <Eric.Moore@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-01-14 10:55:09 -06:00

910 lines
24 KiB
C

/*
* Copyright (C) 2005 Dell Inc.
* Released under GPL v2.
*
* Serial Attached SCSI (SAS) transport class.
*
* The SAS transport class contains common code to deal with SAS HBAs,
* an aproximated representation of SAS topologies in the driver model,
* and various sysfs attributes to expose these topologies and managment
* interfaces to userspace.
*
* In addition to the basic SCSI core objects this transport class
* introduces two additional intermediate objects: The SAS PHY
* as represented by struct sas_phy defines an "outgoing" PHY on
* a SAS HBA or Expander, and the SAS remote PHY represented by
* struct sas_rphy defines an "incoming" PHY on a SAS Expander or
* end device. Note that this is purely a software concept, the
* underlying hardware for a PHY and a remote PHY is the exactly
* the same.
*
* There is no concept of a SAS port in this code, users can see
* what PHYs form a wide port based on the port_identifier attribute,
* which is the same for all PHYs in a port.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_sas.h>
#define SAS_HOST_ATTRS 0
#define SAS_PORT_ATTRS 17
#define SAS_RPORT_ATTRS 5
struct sas_internal {
struct scsi_transport_template t;
struct sas_function_template *f;
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_rphy_attrs[SAS_RPORT_ATTRS];
struct transport_container phy_attr_cont;
struct transport_container rphy_attr_cont;
/*
* The array of null terminated pointers to attributes
* 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 *rphy_attrs[SAS_RPORT_ATTRS + 1];
};
#define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t)
struct sas_host_attrs {
struct list_head rphy_list;
struct mutex lock;
u32 next_target_id;
};
#define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
/*
* Hack to allow attributes of the same name in different objects.
*/
#define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
struct class_device_attribute class_device_attr_##_prefix##_##_name = \
__ATTR(_name,_mode,_show,_store)
/*
* Pretty printing helpers
*/
#define sas_bitfield_name_match(title, table) \
static ssize_t \
get_sas_##title##_names(u32 table_key, char *buf) \
{ \
char *prefix = ""; \
ssize_t len = 0; \
int i; \
\
for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
if (table[i].value & table_key) { \
len += sprintf(buf + len, "%s%s", \
prefix, table[i].name); \
prefix = ", "; \
} \
} \
len += sprintf(buf + len, "\n"); \
return len; \
}
#define sas_bitfield_name_search(title, table) \
static ssize_t \
get_sas_##title##_names(u32 table_key, char *buf) \
{ \
ssize_t len = 0; \
int i; \
\
for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
if (table[i].value == table_key) { \
len += sprintf(buf + len, "%s", \
table[i].name); \
break; \
} \
} \
len += sprintf(buf + len, "\n"); \
return len; \
}
static struct {
u32 value;
char *name;
} sas_device_type_names[] = {
{ SAS_PHY_UNUSED, "unused" },
{ SAS_END_DEVICE, "end device" },
{ SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
{ SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
};
sas_bitfield_name_search(device_type, sas_device_type_names)
static struct {
u32 value;
char *name;
} sas_protocol_names[] = {
{ SAS_PROTOCOL_SATA, "sata" },
{ SAS_PROTOCOL_SMP, "smp" },
{ SAS_PROTOCOL_STP, "stp" },
{ SAS_PROTOCOL_SSP, "ssp" },
};
sas_bitfield_name_match(protocol, sas_protocol_names)
static struct {
u32 value;
char *name;
} sas_linkspeed_names[] = {
{ SAS_LINK_RATE_UNKNOWN, "Unknown" },
{ SAS_PHY_DISABLED, "Phy disabled" },
{ SAS_LINK_RATE_FAILED, "Link Rate failed" },
{ SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
{ SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
{ SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
};
sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
/*
* SAS host attributes
*/
static int sas_host_setup(struct transport_container *tc, struct device *dev,
struct class_device *cdev)
{
struct Scsi_Host *shost = dev_to_shost(dev);
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
INIT_LIST_HEAD(&sas_host->rphy_list);
mutex_init(&sas_host->lock);
sas_host->next_target_id = 0;
return 0;
}
static DECLARE_TRANSPORT_CLASS(sas_host_class,
"sas_host", sas_host_setup, NULL, NULL);
static int sas_host_match(struct attribute_container *cont,
struct device *dev)
{
struct Scsi_Host *shost;
struct sas_internal *i;
if (!scsi_is_host_device(dev))
return 0;
shost = dev_to_shost(dev);
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->t.host_attrs.ac == cont;
}
static int do_sas_phy_delete(struct device *dev, void *data)
{
if (scsi_is_sas_phy(dev))
sas_phy_delete(dev_to_phy(dev));
return 0;
}
/**
* sas_remove_host -- tear down a Scsi_Host's SAS data structures
* @shost: Scsi Host that is torn down
*
* Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
* Must be called just before scsi_remove_host for SAS HBAs.
*/
void sas_remove_host(struct Scsi_Host *shost)
{
device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);
}
EXPORT_SYMBOL(sas_remove_host);
/*
* SAS Port attributes
*/
#define sas_phy_show_simple(field, name, format_string, cast) \
static ssize_t \
show_sas_phy_##name(struct class_device *cdev, char *buf) \
{ \
struct sas_phy *phy = transport_class_to_phy(cdev); \
\
return snprintf(buf, 20, format_string, cast phy->field); \
}
#define sas_phy_simple_attr(field, name, format_string, type) \
sas_phy_show_simple(field, name, format_string, (type)) \
static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
#define sas_phy_show_protocol(field, name) \
static ssize_t \
show_sas_phy_##name(struct class_device *cdev, char *buf) \
{ \
struct sas_phy *phy = transport_class_to_phy(cdev); \
\
if (!phy->field) \
return snprintf(buf, 20, "none\n"); \
return get_sas_protocol_names(phy->field, buf); \
}
#define sas_phy_protocol_attr(field, name) \
sas_phy_show_protocol(field, name) \
static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
#define sas_phy_show_linkspeed(field) \
static ssize_t \
show_sas_phy_##field(struct class_device *cdev, char *buf) \
{ \
struct sas_phy *phy = transport_class_to_phy(cdev); \
\
return get_sas_linkspeed_names(phy->field, buf); \
}
#define sas_phy_linkspeed_attr(field) \
sas_phy_show_linkspeed(field) \
static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
#define sas_phy_show_linkerror(field) \
static ssize_t \
show_sas_phy_##field(struct class_device *cdev, char *buf) \
{ \
struct sas_phy *phy = transport_class_to_phy(cdev); \
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
struct sas_internal *i = to_sas_internal(shost->transportt); \
int error; \
\
if (!phy->local_attached) \
return -EINVAL; \
\
error = i->f->get_linkerrors(phy); \
if (error) \
return error; \
return snprintf(buf, 20, "%u\n", phy->field); \
}
#define sas_phy_linkerror_attr(field) \
sas_phy_show_linkerror(field) \
static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
static ssize_t
show_sas_device_type(struct class_device *cdev, char *buf)
{
struct sas_phy *phy = transport_class_to_phy(cdev);
if (!phy->identify.device_type)
return snprintf(buf, 20, "none\n");
return get_sas_device_type_names(phy->identify.device_type, buf);
}
static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
static ssize_t do_sas_phy_reset(struct class_device *cdev,
size_t count, int hard_reset)
{
struct sas_phy *phy = transport_class_to_phy(cdev);
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
struct sas_internal *i = to_sas_internal(shost->transportt);
int error;
if (!phy->local_attached)
return -EINVAL;
error = i->f->phy_reset(phy, hard_reset);
if (error)
return error;
return count;
};
static ssize_t store_sas_link_reset(struct class_device *cdev,
const char *buf, size_t count)
{
return do_sas_phy_reset(cdev, count, 0);
}
static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
static ssize_t store_sas_hard_reset(struct class_device *cdev,
const char *buf, size_t count)
{
return do_sas_phy_reset(cdev, count, 1);
}
static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
sas_phy_protocol_attr(identify.initiator_port_protocols,
initiator_port_protocols);
sas_phy_protocol_attr(identify.target_port_protocols,
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_linkspeed_attr(negotiated_linkrate);
sas_phy_linkspeed_attr(minimum_linkrate_hw);
sas_phy_linkspeed_attr(minimum_linkrate);
sas_phy_linkspeed_attr(maximum_linkrate_hw);
sas_phy_linkspeed_attr(maximum_linkrate);
sas_phy_linkerror_attr(invalid_dword_count);
sas_phy_linkerror_attr(running_disparity_error_count);
sas_phy_linkerror_attr(loss_of_dword_sync_count);
sas_phy_linkerror_attr(phy_reset_problem_count);
static DECLARE_TRANSPORT_CLASS(sas_phy_class,
"sas_phy", NULL, NULL, NULL);
static int sas_phy_match(struct attribute_container *cont, struct device *dev)
{
struct Scsi_Host *shost;
struct sas_internal *i;
if (!scsi_is_sas_phy(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->phy_attr_cont.ac == cont;
}
static void sas_phy_release(struct device *dev)
{
struct sas_phy *phy = dev_to_phy(dev);
put_device(dev->parent);
kfree(phy);
}
/**
* sas_phy_alloc -- allocates and initialize a SAS PHY structure
* @parent: Parent device
* @number: Port number
*
* Allocates an SAS PHY structure. It will be added in the device tree
* below the device specified by @parent, which has to be either a Scsi_Host
* or sas_rphy.
*
* Returns:
* SAS PHY allocated or %NULL if the allocation failed.
*/
struct sas_phy *sas_phy_alloc(struct device *parent, int number)
{
struct Scsi_Host *shost = dev_to_shost(parent);
struct sas_phy *phy;
phy = kmalloc(sizeof(*phy), GFP_KERNEL);
if (!phy)
return NULL;
memset(phy, 0, sizeof(*phy));
get_device(parent);
phy->number = number;
device_initialize(&phy->dev);
phy->dev.parent = get_device(parent);
phy->dev.release = sas_phy_release;
sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
transport_setup_device(&phy->dev);
return phy;
}
EXPORT_SYMBOL(sas_phy_alloc);
/**
* sas_phy_add -- add a SAS PHY to the device hierachy
* @phy: The PHY to be added
*
* Publishes a SAS PHY to the rest of the system.
*/
int sas_phy_add(struct sas_phy *phy)
{
int error;
error = device_add(&phy->dev);
if (!error) {
transport_add_device(&phy->dev);
transport_configure_device(&phy->dev);
}
return error;
}
EXPORT_SYMBOL(sas_phy_add);
/**
* sas_phy_free -- free a SAS PHY
* @phy: SAS PHY to free
*
* Frees the specified SAS PHY.
*
* Note:
* This function must only be called on a PHY that has not
* sucessfully been added using sas_phy_add().
*/
void sas_phy_free(struct sas_phy *phy)
{
transport_destroy_device(&phy->dev);
put_device(phy->dev.parent);
put_device(phy->dev.parent);
put_device(phy->dev.parent);
kfree(phy);
}
EXPORT_SYMBOL(sas_phy_free);
/**
* sas_phy_delete -- remove SAS PHY
* @phy: SAS PHY to remove
*
* Removes the specified SAS PHY. If the SAS PHY has an
* associated remote PHY it is removed before.
*/
void
sas_phy_delete(struct sas_phy *phy)
{
struct device *dev = &phy->dev;
if (phy->rphy)
sas_rphy_delete(phy->rphy);
transport_remove_device(dev);
device_del(dev);
transport_destroy_device(dev);
put_device(dev->parent);
}
EXPORT_SYMBOL(sas_phy_delete);
/**
* scsi_is_sas_phy -- check if a struct device represents a SAS PHY
* @dev: device to check
*
* Returns:
* %1 if the device represents a SAS PHY, %0 else
*/
int scsi_is_sas_phy(const struct device *dev)
{
return dev->release == sas_phy_release;
}
EXPORT_SYMBOL(scsi_is_sas_phy);
/*
* SAS remote PHY attributes.
*/
#define sas_rphy_show_simple(field, name, format_string, cast) \
static ssize_t \
show_sas_rphy_##name(struct class_device *cdev, char *buf) \
{ \
struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
\
return snprintf(buf, 20, format_string, cast rphy->field); \
}
#define sas_rphy_simple_attr(field, name, format_string, type) \
sas_rphy_show_simple(field, name, format_string, (type)) \
static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
show_sas_rphy_##name, NULL)
#define sas_rphy_show_protocol(field, name) \
static ssize_t \
show_sas_rphy_##name(struct class_device *cdev, char *buf) \
{ \
struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
\
if (!rphy->field) \
return snprintf(buf, 20, "none\n"); \
return get_sas_protocol_names(rphy->field, buf); \
}
#define sas_rphy_protocol_attr(field, name) \
sas_rphy_show_protocol(field, name) \
static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
show_sas_rphy_##name, NULL)
static ssize_t
show_sas_rphy_device_type(struct class_device *cdev, char *buf)
{
struct sas_rphy *rphy = transport_class_to_rphy(cdev);
if (!rphy->identify.device_type)
return snprintf(buf, 20, "none\n");
return get_sas_device_type_names(
rphy->identify.device_type, buf);
}
static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
show_sas_rphy_device_type, NULL);
sas_rphy_protocol_attr(identify.initiator_port_protocols,
initiator_port_protocols);
sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
unsigned long long);
sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
"sas_rphy", NULL, NULL, NULL);
static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
{
struct Scsi_Host *shost;
struct sas_internal *i;
if (!scsi_is_sas_rphy(dev))
return 0;
shost = dev_to_shost(dev->parent->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->rphy_attr_cont.ac == cont;
}
static void sas_rphy_release(struct device *dev)
{
struct sas_rphy *rphy = dev_to_rphy(dev);
put_device(dev->parent);
kfree(rphy);
}
/**
* sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure
* @parent: SAS PHY this remote PHY is conneted to
*
* Allocates an SAS remote PHY structure, connected to @parent.
*
* Returns:
* SAS PHY allocated or %NULL if the allocation failed.
*/
struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent)
{
struct Scsi_Host *shost = dev_to_shost(&parent->dev);
struct sas_rphy *rphy;
rphy = kmalloc(sizeof(*rphy), GFP_KERNEL);
if (!rphy) {
put_device(&parent->dev);
return NULL;
}
memset(rphy, 0, sizeof(*rphy));
device_initialize(&rphy->dev);
rphy->dev.parent = get_device(&parent->dev);
rphy->dev.release = sas_rphy_release;
sprintf(rphy->dev.bus_id, "rphy-%d:%d",
shost->host_no, parent->number);
transport_setup_device(&rphy->dev);
return rphy;
}
EXPORT_SYMBOL(sas_rphy_alloc);
/**
* sas_rphy_add -- add a SAS remote PHY to the device hierachy
* @rphy: The remote PHY to be added
*
* Publishes a SAS remote PHY to the rest of the system.
*/
int sas_rphy_add(struct sas_rphy *rphy)
{
struct sas_phy *parent = dev_to_phy(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;
int error;
if (parent->rphy)
return -ENXIO;
parent->rphy = rphy;
error = device_add(&rphy->dev);
if (error)
return error;
transport_add_device(&rphy->dev);
transport_configure_device(&rphy->dev);
mutex_lock(&sas_host->lock);
list_add_tail(&rphy->list, &sas_host->rphy_list);
if (identify->device_type == SAS_END_DEVICE &&
(identify->target_port_protocols &
(SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
rphy->scsi_target_id = sas_host->next_target_id++;
else
rphy->scsi_target_id = -1;
mutex_unlock(&sas_host->lock);
if (rphy->scsi_target_id != -1) {
scsi_scan_target(&rphy->dev, parent->port_identifier,
rphy->scsi_target_id, ~0, 0);
}
return 0;
}
EXPORT_SYMBOL(sas_rphy_add);
/**
* sas_rphy_free -- free a SAS remote PHY
* @rphy SAS remote PHY to free
*
* Frees the specified SAS remote PHY.
*
* Note:
* This function must only be called on a remote
* PHY that has not sucessfully been added using
* sas_rphy_add().
*/
void sas_rphy_free(struct sas_rphy *rphy)
{
struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
mutex_lock(&sas_host->lock);
list_del(&rphy->list);
mutex_unlock(&sas_host->lock);
transport_destroy_device(&rphy->dev);
put_device(rphy->dev.parent);
put_device(rphy->dev.parent);
put_device(rphy->dev.parent);
kfree(rphy);
}
EXPORT_SYMBOL(sas_rphy_free);
/**
* sas_rphy_delete -- remove SAS remote PHY
* @rphy: SAS remote PHY to remove
*
* Removes the specified SAS remote PHY.
*/
void
sas_rphy_delete(struct sas_rphy *rphy)
{
struct device *dev = &rphy->dev;
struct sas_phy *parent = dev_to_phy(dev->parent);
struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
switch (rphy->identify.device_type) {
case SAS_END_DEVICE:
scsi_remove_target(dev);
break;
case SAS_EDGE_EXPANDER_DEVICE:
case SAS_FANOUT_EXPANDER_DEVICE:
device_for_each_child(dev, NULL, do_sas_phy_delete);
break;
default:
break;
}
transport_remove_device(dev);
device_del(dev);
transport_destroy_device(dev);
mutex_lock(&sas_host->lock);
list_del(&rphy->list);
mutex_unlock(&sas_host->lock);
parent->rphy = NULL;
put_device(&parent->dev);
}
EXPORT_SYMBOL(sas_rphy_delete);
/**
* scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY
* @dev: device to check
*
* Returns:
* %1 if the device represents a SAS remote PHY, %0 else
*/
int scsi_is_sas_rphy(const struct device *dev)
{
return dev->release == sas_rphy_release;
}
EXPORT_SYMBOL(scsi_is_sas_rphy);
/*
* SCSI scan helper
*/
static int sas_user_scan(struct Scsi_Host *shost, uint channel,
uint id, uint lun)
{
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
struct sas_rphy *rphy;
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);
if (rphy->scsi_target_id == -1)
continue;
if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) &&
(id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
scsi_scan_target(&rphy->dev, parent->port_identifier,
rphy->scsi_target_id, lun, 1);
}
}
mutex_unlock(&sas_host->lock);
return 0;
}
/*
* Setup / Teardown code
*/
#define SETUP_RPORT_ATTRIBUTE(field) \
i->private_rphy_attrs[count] = class_device_attr_##field; \
i->private_rphy_attrs[count].attr.mode = S_IRUGO; \
i->private_rphy_attrs[count].store = NULL; \
i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \
count++
#define SETUP_PORT_ATTRIBUTE(field) \
i->private_phy_attrs[count] = class_device_attr_##field; \
i->private_phy_attrs[count].attr.mode = S_IRUGO; \
i->private_phy_attrs[count].store = NULL; \
i->phy_attrs[count] = &i->private_phy_attrs[count]; \
count++
#define SETUP_PORT_ATTRIBUTE_WRONLY(field) \
i->private_phy_attrs[count] = class_device_attr_##field; \
i->private_phy_attrs[count].attr.mode = S_IWUGO; \
i->private_phy_attrs[count].show = NULL; \
i->phy_attrs[count] = &i->private_phy_attrs[count]; \
count++
/**
* sas_attach_transport -- instantiate SAS transport template
* @ft: SAS transport class function template
*/
struct scsi_transport_template *
sas_attach_transport(struct sas_function_template *ft)
{
struct sas_internal *i;
int count;
i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL);
if (!i)
return NULL;
memset(i, 0, sizeof(struct sas_internal));
i->t.user_scan = sas_user_scan;
i->t.host_attrs.ac.attrs = &i->host_attrs[0];
i->t.host_attrs.ac.class = &sas_host_class.class;
i->t.host_attrs.ac.match = sas_host_match;
transport_container_register(&i->t.host_attrs);
i->t.host_size = sizeof(struct sas_host_attrs);
i->phy_attr_cont.ac.class = &sas_phy_class.class;
i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
i->phy_attr_cont.ac.match = sas_phy_match;
transport_container_register(&i->phy_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;
transport_container_register(&i->rphy_attr_cont);
i->f = ft;
count = 0;
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_PORT_ATTRIBUTE_WRONLY(link_reset);
SETUP_PORT_ATTRIBUTE_WRONLY(hard_reset);
i->phy_attrs[count] = NULL;
count = 0;
SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
SETUP_RPORT_ATTRIBUTE(rphy_device_type);
SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
i->rphy_attrs[count] = NULL;
return &i->t;
}
EXPORT_SYMBOL(sas_attach_transport);
/**
* sas_release_transport -- release SAS transport template instance
* @t: transport template instance
*/
void sas_release_transport(struct scsi_transport_template *t)
{
struct sas_internal *i = to_sas_internal(t);
transport_container_unregister(&i->t.host_attrs);
transport_container_unregister(&i->phy_attr_cont);
transport_container_unregister(&i->rphy_attr_cont);
kfree(i);
}
EXPORT_SYMBOL(sas_release_transport);
static __init int sas_transport_init(void)
{
int error;
error = transport_class_register(&sas_host_class);
if (error)
goto out;
error = transport_class_register(&sas_phy_class);
if (error)
goto out_unregister_transport;
error = transport_class_register(&sas_rphy_class);
if (error)
goto out_unregister_phy;
return 0;
out_unregister_phy:
transport_class_unregister(&sas_phy_class);
out_unregister_transport:
transport_class_unregister(&sas_host_class);
out:
return error;
}
static void __exit sas_transport_exit(void)
{
transport_class_unregister(&sas_host_class);
transport_class_unregister(&sas_phy_class);
transport_class_unregister(&sas_rphy_class);
}
MODULE_AUTHOR("Christoph Hellwig");
MODULE_DESCRIPTION("SAS Transphy Attributes");
MODULE_LICENSE("GPL");
module_init(sas_transport_init);
module_exit(sas_transport_exit);