| /* |
| * 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->number, |
| 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->number) && |
| (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) { |
| scsi_scan_target(&rphy->dev, parent->number, |
| 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); |