diff options
| -rw-r--r-- | drivers/scsi/scsi_transport_sas.c | 199 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_sas.h | 19 |
2 files changed, 184 insertions, 34 deletions
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index 434f3954aa87..5de29b941c6b 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -39,6 +39,7 @@ #define SAS_HOST_ATTRS 0 #define SAS_PORT_ATTRS 17 #define SAS_RPORT_ATTRS 7 +#define SAS_END_DEV_ATTRS 3 struct sas_internal { struct scsi_transport_template t; @@ -47,9 +48,11 @@ struct sas_internal { 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 class_device_attribute private_end_dev_attrs[SAS_END_DEV_ATTRS]; struct transport_container phy_attr_cont; struct transport_container rphy_attr_cont; + struct transport_container end_dev_attr_cont; /* * The array of null terminated pointers to attributes @@ -58,6 +61,7 @@ struct sas_internal { 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]; + struct class_device_attribute *end_dev_attrs[SAS_END_DEV_ATTRS + 1]; }; #define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t) @@ -588,6 +592,73 @@ 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); +/* only need 8 bytes of data plus header (4 or 8) */ +#define BUF_SIZE 64 + +int sas_read_port_mode_page(struct scsi_device *sdev) +{ + char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata; + struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target); + struct sas_end_device *rdev; + struct scsi_mode_data mode_data; + int res, error; + + BUG_ON(rphy->identify.device_type != SAS_END_DEVICE); + + rdev = rphy_to_end_device(rphy); + + if (!buffer) + return -ENOMEM; + + res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3, + &mode_data, NULL); + + error = -EINVAL; + if (!scsi_status_is_good(res)) + goto out; + + msdata = buffer + mode_data.header_length + + mode_data.block_descriptor_length; + + if (msdata - buffer > BUF_SIZE - 8) + goto out; + + error = 0; + + rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0; + rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5]; + rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7]; + + out: + kfree(buffer); + return error; +} +EXPORT_SYMBOL(sas_read_port_mode_page); + +#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) \ +{ \ + struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ + struct sas_end_device *rdev = rphy_to_end_device(rphy); \ + \ + return snprintf(buf, 20, format_string, cast rdev->field); \ +} + +#define sas_end_dev_simple_attr(field, name, format_string, type) \ + sas_end_dev_show_simple(field, name, format_string, (type)) \ +static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO, \ + show_sas_end_dev_##name, NULL) + +sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int); +sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout, + "%d\n", int); +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_rphy_class, "sas_rphy", NULL, NULL, NULL); @@ -610,6 +681,31 @@ static int sas_rphy_match(struct attribute_container *cont, struct device *dev) return &i->rphy_attr_cont.ac == cont; } +static int sas_end_dev_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->end_dev_attr_cont.ac == cont && + rphy->identify.device_type == SAS_END_DEVICE && + /* FIXME: remove contained eventually */ + rphy->contained; +} + static void sas_rphy_release(struct device *dev) { struct sas_rphy *rphy = dev_to_rphy(dev); @@ -650,6 +746,40 @@ struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent) EXPORT_SYMBOL(sas_rphy_alloc); /** + * sas_end_device_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_end_device_alloc(struct sas_phy *parent) +{ + struct Scsi_Host *shost = dev_to_shost(&parent->dev); + struct sas_end_device *rdev; + + 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; + sprintf(rdev->rphy.dev.bus_id, "rphy-%d:%d-%d", + shost->host_no, parent->port_identifier, parent->number); + rdev->rphy.identify.device_type = SAS_END_DEVICE; + /* 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_end_device_alloc); + + +/** * sas_rphy_add -- add a SAS remote PHY to the device hierachy * @rphy: The remote PHY to be added * @@ -807,51 +937,35 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel, * 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_TEMPLATE(attrb, field, perm, test) \ + i->private_##attrb[count] = class_device_attr_##field; \ + i->private_##attrb[count].attr.mode = perm; \ + i->private_##attrb[count].store = NULL; \ + i->attrb[count] = &i->private_##attrb[count]; \ + if (test) \ + count++ + + +#define SETUP_RPORT_ATTRIBUTE(field) \ + SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1) #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \ - 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]; \ - if (i->f->func) \ - count++ + SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func) #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++ + SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1) #define SETUP_OPTIONAL_PORT_ATTRIBUTE(field, func) \ - 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]; \ - if (i->f->func) \ - count++ + SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func) #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++ + SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1) #define SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(field, func) \ - 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]; \ - if (i->f->func) \ - count++ + SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func) +#define SETUP_END_DEV_ATTRIBUTE(field) \ + SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1) /** * sas_attach_transport -- instantiate SAS transport template @@ -885,6 +999,11 @@ sas_attach_transport(struct sas_function_template *ft) i->rphy_attr_cont.ac.match = sas_rphy_match; transport_container_register(&i->rphy_attr_cont); + i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class; + i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0]; + i->end_dev_attr_cont.ac.match = sas_end_dev_match; + transport_container_register(&i->end_dev_attr_cont); + i->f = ft; count = 0; @@ -923,6 +1042,12 @@ sas_attach_transport(struct sas_function_template *ft) get_bay_identifier); i->rphy_attrs[count] = NULL; + count = 0; + SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning); + SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout); + SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout); + i->end_dev_attrs[count] = NULL; + return &i->t; } EXPORT_SYMBOL(sas_attach_transport); @@ -956,9 +1081,14 @@ static __init int sas_transport_init(void) error = transport_class_register(&sas_rphy_class); if (error) goto out_unregister_phy; + error = transport_class_register(&sas_end_dev_class); + if (error) + goto out_unregister_rphy; return 0; + out_unregister_rphy: + transport_class_unregister(&sas_rphy_class); out_unregister_phy: transport_class_unregister(&sas_phy_class); out_unregister_transport: @@ -973,6 +1103,7 @@ 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); + transport_class_unregister(&sas_end_dev_class); } MODULE_AUTHOR("Christoph Hellwig"); diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 95e2132d485e..8fded431cf46 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -82,6 +82,10 @@ struct sas_rphy { struct sas_identify identify; struct list_head list; u32 scsi_target_id; + /* temporary expedient: mark the rphy as being contained + * within a type specific rphy + * FIXME: pull this out when everything uses the containers */ + unsigned contained:1; }; #define dev_to_rphy(d) \ @@ -90,6 +94,19 @@ struct sas_rphy { dev_to_rphy((cdev)->dev) #define rphy_to_shost(rphy) \ dev_to_shost((rphy)->dev.parent) +#define target_to_rphy(targ) \ + dev_to_rphy((targ)->dev.parent) + +struct sas_end_device { + struct sas_rphy rphy; + /* flags */ + unsigned ready_led_meaning:1; + /* parameters */ + u16 I_T_nexus_loss_timeout; + u16 initiator_response_timeout; +}; +#define rphy_to_end_device(r) \ + container_of((r), struct sas_end_device, rphy) /* The functions by which the transport class and the driver communicate */ @@ -110,6 +127,7 @@ extern void sas_phy_delete(struct sas_phy *); 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 *); void sas_rphy_free(struct sas_rphy *); extern int sas_rphy_add(struct sas_rphy *); extern void sas_rphy_delete(struct sas_rphy *); @@ -118,5 +136,6 @@ extern int scsi_is_sas_rphy(const struct device *); extern struct scsi_transport_template * 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 *); #endif /* SCSI_TRANSPORT_SAS_H */ |