/* * Copyright (C) 2005-2006 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 #include #include #include #include #include #include #include #include #include #include "scsi_sas_internal.h" 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) /* * 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_LINK_RATE_6_0_GBPS, "6.0 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; sas_host->next_expander_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 ? i->f->get_linkerrors(phy) : 0; \ 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: Phy index * * 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 = kzalloc(sizeof(*phy), GFP_KERNEL); if (!phy) return NULL; phy->number = number; device_initialize(&phy->dev); phy->dev.parent = get_device(parent); phy->dev.release = sas_phy_release; 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); 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); } 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); } 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); static ssize_t show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf) { struct sas_rphy *rphy = transport_class_to_rphy(cdev); struct sas_phy *phy = dev_to_phy(rphy->dev.parent); struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); struct sas_internal *i = to_sas_internal(shost->transportt); u64 identifier; int error; /* * Only devices behind an expander are supported, because the * enclosure identifier is a SMP feature. */ if (phy->local_attached) return -EINVAL; error = i->f->get_enclosure_identifier(rphy, &identifier); if (error) return error; return sprintf(buf, "0x%llx\n", (unsigned long long)identifier); } static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO, show_sas_rphy_enclosure_identifier, NULL); static ssize_t show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf) { struct sas_rphy *rphy = transport_class_to_rphy(cdev); struct sas_phy *phy = dev_to_phy(rphy->dev.parent); struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); struct sas_internal *i = to_sas_internal(shost->transportt); int val; if (phy->local_attached) return -EINVAL; val = i->f->get_bay_identifier(rphy); if (val < 0) return val; return sprintf(buf, "%d\n", val); } static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO, show_sas_rphy_bay_identifier, 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); /* 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); 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) \ { \ 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_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_device", 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 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; } 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); } static void sas_expander_release(struct device *dev) { struct sas_rphy *rphy = dev_to_rphy(dev); struct sas_expander_device *edev = rphy_to_expander_device(rphy); put_device(dev->parent); kfree(edev); } static void sas_end_device_release(struct device *dev) { struct sas_rphy *rphy = dev_to_rphy(dev); struct sas_end_device *edev = rphy_to_end_device(rphy); put_device(dev->parent); kfree(edev); } /** * 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) { return NULL; } 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); rdev->rphy.identify.device_type = SAS_END_DEVICE; transport_setup_device(&rdev->rphy.dev); return &rdev->rphy; } 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) { return NULL; } device_initialize(&rdev->rphy.dev); rdev->rphy.dev.parent = get_device(&parent->dev); rdev->rphy.dev.release = sas_expander_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; 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 * @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 if (identify->device_type == SAS_END_DEVICE) rphy->scsi_target_id = -1; mutex_unlock(&sas_host->lock); 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); } 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 device *dev = &rphy->dev; 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(dev); put_device(dev); } 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(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_end_device_release || dev->release == sas_expander_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_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) \ SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func) #define SETUP_PORT_ATTRIBUTE(field) \ SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1) #define SETUP_OPTIONAL_PORT_ATTRIBUTE(field, func) \ SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func) #define SETUP_PORT_ATTRIBUTE_WRONLY(field) \ SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1) #define SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(field, func) \ 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) #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 */ struct scsi_transport_template * sas_attach_transport(struct sas_function_template *ft) { struct sas_internal *i; int count; i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL); if (!i) return NULL; 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->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->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; 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); 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); SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier, get_enclosure_identifier); SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier, 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; 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); /** * 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); transport_container_unregister(&i->end_dev_attr_cont); transport_container_unregister(&i->expander_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; 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: 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); transport_class_unregister(&sas_end_dev_class); transport_class_unregister(&sas_expander_class); } MODULE_AUTHOR("Christoph Hellwig"); MODULE_DESCRIPTION("SAS Transphy Attributes"); MODULE_LICENSE("GPL"); module_init(sas_transport_init); module_exit(sas_transport_exit);