diff options
| -rw-r--r-- | drivers/scsi/scsi_transport_sas.c | 141 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_sas.h | 31 |
2 files changed, 166 insertions, 6 deletions
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index 3eb11a1..5a70d04 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -40,6 +40,7 @@ #define SAS_PORT_ATTRS 17 #define SAS_RPORT_ATTRS 7 #define SAS_END_DEV_ATTRS 3 +#define SAS_EXPANDER_ATTRS 7 struct sas_internal { struct scsi_transport_template t; @@ -49,10 +50,12 @@ struct sas_internal { struct class_device_attribute private_phy_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 rphy_attr_cont; struct transport_container end_dev_attr_cont; + struct transport_container expander_attr_cont; /* * The array of null terminated pointers to attributes @@ -62,6 +65,7 @@ struct sas_internal { struct class_device_attribute *phy_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]; }; #define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t) @@ -69,6 +73,7 @@ struct sas_host_attrs { struct list_head rphy_list; struct mutex lock; u32 next_target_id; + u32 next_expander_id; }; #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) @@ -173,6 +178,7 @@ static int sas_host_setup(struct transport_container *tc, struct device *dev, INIT_LIST_HEAD(&sas_host->rphy_list); mutex_init(&sas_host->lock); sas_host->next_target_id = 0; + sas_host->next_expander_id = 0; return 0; } @@ -407,7 +413,12 @@ 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; - sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); + 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, + rphy->scsi_target_id, number); + } else + sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); transport_setup_device(&phy->dev); @@ -635,6 +646,9 @@ int sas_read_port_mode_page(struct scsi_device *sdev) } EXPORT_SYMBOL(sas_read_port_mode_page); +static DECLARE_TRANSPORT_CLASS(sas_end_dev_class, + "sas_end_device", NULL, NULL, NULL); + #define sas_end_dev_show_simple(field, name, format_string, cast) \ static ssize_t \ show_sas_end_dev_##name(struct class_device *cdev, char *buf) \ @@ -656,8 +670,33 @@ sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout, sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout, "%d\n", int); -static DECLARE_TRANSPORT_CLASS(sas_end_dev_class, - "sas_end_device", NULL, NULL, NULL); +static DECLARE_TRANSPORT_CLASS(sas_expander_class, + "sas_expander", NULL, NULL, NULL); + +#define sas_expander_show_simple(field, name, format_string, cast) \ +static ssize_t \ +show_sas_expander_##name(struct class_device *cdev, char *buf) \ +{ \ + struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ + struct sas_expander_device *edev = rphy_to_expander_device(rphy); \ + \ + return snprintf(buf, 20, format_string, cast edev->field); \ +} + +#define sas_expander_simple_attr(field, name, format_string, type) \ + sas_expander_show_simple(field, name, format_string, (type)) \ +static SAS_CLASS_DEVICE_ATTR(expander, name, S_IRUGO, \ + show_sas_expander_##name, NULL) + +sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *); +sas_expander_simple_attr(product_id, product_id, "%s\n", char *); +sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *); +sas_expander_simple_attr(component_vendor_id, component_vendor_id, + "%s\n", char *); +sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int); +sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n", + unsigned int); +sas_expander_simple_attr(level, level, "%d\n", int); static DECLARE_TRANSPORT_CLASS(sas_rphy_class, "sas_rphy", NULL, NULL, NULL); @@ -706,6 +745,32 @@ static int sas_end_dev_match(struct attribute_container *cont, rphy->contained; } +static int sas_expander_match(struct attribute_container *cont, + struct device *dev) +{ + struct Scsi_Host *shost; + struct sas_internal *i; + struct sas_rphy *rphy; + + if (!scsi_is_sas_rphy(dev)) + return 0; + shost = dev_to_shost(dev->parent->parent); + rphy = dev_to_rphy(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->expander_attr_cont.ac == cont && + (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE || + rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE) && + /* FIXME: remove contained eventually */ + rphy->contained; +} + static void sas_rphy_release(struct device *dev) { struct sas_rphy *rphy = dev_to_rphy(dev); @@ -778,6 +843,46 @@ struct sas_rphy *sas_end_device_alloc(struct sas_phy *parent) } EXPORT_SYMBOL(sas_end_device_alloc); +/** + * sas_expander_alloc - allocate an rphy for an end device + * + * Allocates an SAS remote PHY structure, connected to @parent. + * + * Returns: + * SAS PHY allocated or %NULL if the allocation failed. + */ +struct sas_rphy *sas_expander_alloc(struct sas_phy *parent, + enum sas_device_type type) +{ + struct Scsi_Host *shost = dev_to_shost(&parent->dev); + struct sas_expander_device *rdev; + struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); + + BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE && + type != SAS_FANOUT_EXPANDER_DEVICE); + + rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); + if (!rdev) { + put_device(&parent->dev); + return NULL; + } + + device_initialize(&rdev->rphy.dev); + rdev->rphy.dev.parent = get_device(&parent->dev); + rdev->rphy.dev.release = sas_rphy_release; + mutex_lock(&sas_host->lock); + rdev->rphy.scsi_target_id = sas_host->next_expander_id++; + mutex_unlock(&sas_host->lock); + sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d", + shost->host_no, rdev->rphy.scsi_target_id); + rdev->rphy.identify.device_type = type; + /* FIXME: mark the rphy as being contained in a larger structure */ + rdev->rphy.contained = 1; + transport_setup_device(&rdev->rphy.dev); + + return &rdev->rphy; +} +EXPORT_SYMBOL(sas_expander_alloc); /** * sas_rphy_add -- add a SAS remote PHY to the device hierachy @@ -809,11 +914,10 @@ int sas_rphy_add(struct sas_rphy *rphy) (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) { + if (identify->device_type == SAS_END_DEVICE && + rphy->scsi_target_id != -1) { scsi_scan_target(&rphy->dev, parent->port_identifier, rphy->scsi_target_id, ~0, 0); } @@ -967,6 +1071,9 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel, #define SETUP_END_DEV_ATTRIBUTE(field) \ SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1) +#define SETUP_EXPANDER_ATTRIBUTE(field) \ + SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1) + /** * sas_attach_transport -- instantiate SAS transport template * @ft: SAS transport class function template @@ -1004,6 +1111,11 @@ sas_attach_transport(struct sas_function_template *ft) i->end_dev_attr_cont.ac.match = sas_end_dev_match; transport_container_register(&i->end_dev_attr_cont); + i->expander_attr_cont.ac.class = &sas_expander_class.class; + i->expander_attr_cont.ac.attrs = &i->expander_attrs[0]; + i->expander_attr_cont.ac.match = sas_expander_match; + transport_container_register(&i->expander_attr_cont); + i->f = ft; count = 0; @@ -1048,6 +1160,16 @@ sas_attach_transport(struct sas_function_template *ft) SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout); i->end_dev_attrs[count] = NULL; + count = 0; + SETUP_EXPANDER_ATTRIBUTE(vendor_id); + SETUP_EXPANDER_ATTRIBUTE(product_id); + SETUP_EXPANDER_ATTRIBUTE(product_rev); + SETUP_EXPANDER_ATTRIBUTE(component_vendor_id); + SETUP_EXPANDER_ATTRIBUTE(component_id); + SETUP_EXPANDER_ATTRIBUTE(component_revision_id); + SETUP_EXPANDER_ATTRIBUTE(level); + i->expander_attrs[count] = NULL; + return &i->t; } EXPORT_SYMBOL(sas_attach_transport); @@ -1064,6 +1186,7 @@ void sas_release_transport(struct scsi_transport_template *t) transport_container_unregister(&i->phy_attr_cont); transport_container_unregister(&i->rphy_attr_cont); transport_container_unregister(&i->end_dev_attr_cont); + transport_container_unregister(&i->expander_attr_cont); kfree(i); } @@ -1085,9 +1208,14 @@ static __init int sas_transport_init(void) error = transport_class_register(&sas_end_dev_class); if (error) goto out_unregister_rphy; + error = transport_class_register(&sas_expander_class); + if (error) + goto out_unregister_end_dev; return 0; + out_unregister_end_dev: + transport_class_unregister(&sas_end_dev_class); out_unregister_rphy: transport_class_unregister(&sas_rphy_class); out_unregister_phy: @@ -1105,6 +1233,7 @@ static void __exit sas_transport_exit(void) transport_class_unregister(&sas_phy_class); transport_class_unregister(&sas_rphy_class); transport_class_unregister(&sas_end_dev_class); + transport_class_unregister(&sas_expander_class); } MODULE_AUTHOR("Christoph Hellwig"); diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 8fded43..2943ccc 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -108,6 +108,25 @@ struct sas_end_device { #define rphy_to_end_device(r) \ container_of((r), struct sas_end_device, rphy) +struct sas_expander_device { + int level; + + #define SAS_EXPANDER_VENDOR_ID_LEN 8 + char vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1]; + #define SAS_EXPANDER_PRODUCT_ID_LEN 16 + char product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1]; + #define SAS_EXPANDER_PRODUCT_REV_LEN 4 + char product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1]; + #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN 8 + char component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1]; + u16 component_id; + u8 component_revision_id; + + struct sas_rphy rphy; + +}; +#define rphy_to_expander_device(r) \ + container_of((r), struct sas_expander_device, rphy) /* The functions by which the transport class and the driver communicate */ struct sas_function_template { @@ -128,6 +147,7 @@ extern int scsi_is_sas_phy(const struct device *); extern struct sas_rphy *sas_rphy_alloc(struct sas_phy *); 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); void sas_rphy_free(struct sas_rphy *); extern int sas_rphy_add(struct sas_rphy *); extern void sas_rphy_delete(struct sas_rphy *); @@ -138,4 +158,15 @@ sas_attach_transport(struct sas_function_template *); extern void sas_release_transport(struct scsi_transport_template *); int sas_read_port_mode_page(struct scsi_device *); +static inline int +scsi_is_sas_expander_device(struct device *dev) +{ + struct sas_rphy *rphy; + if (!scsi_is_sas_rphy(dev)) + return 0; + rphy = dev_to_rphy(dev); + return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE || + rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE; +} + #endif /* SCSI_TRANSPORT_SAS_H */ |