| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| James Bottomley | 3360 | 46.22% | 20 | 28.57% |
| Christoph Hellwig | 2909 | 40.02% | 12 | 17.14% |
| Darrick J. Wong | 308 | 4.24% | 4 | 5.71% |
| Dan J Williams | 282 | 3.88% | 5 | 7.14% |
| FUJITA Tomonori | 161 | 2.21% | 3 | 4.29% |
| Tony Jones | 104 | 1.43% | 1 | 1.43% |
| Kay Sievers | 39 | 0.54% | 1 | 1.43% |
| Hannes Reinecke | 19 | 0.26% | 3 | 4.29% |
| Rob Landley | 16 | 0.22% | 1 | 1.43% |
| Bart Van Assche | 12 | 0.17% | 3 | 4.29% |
| Mike Anderson | 11 | 0.15% | 1 | 1.43% |
| Johannes Thumshirn | 6 | 0.08% | 1 | 1.43% |
| Tim Schmielau | 6 | 0.08% | 1 | 1.43% |
| Sreekanth Reddy | 6 | 0.08% | 1 | 1.43% |
| Jens Axboe | 5 | 0.07% | 2 | 2.86% |
| Joe Lawrence | 4 | 0.06% | 1 | 1.43% |
| Eric Moore | 4 | 0.06% | 1 | 1.43% |
| André Goddard Rosa | 3 | 0.04% | 1 | 1.43% |
| Jes Sorensen | 3 | 0.04% | 1 | 1.43% |
| Al Viro | 3 | 0.04% | 1 | 1.43% |
| Harvey Harrison | 2 | 0.03% | 1 | 1.43% |
| Tobias Klauser | 2 | 0.03% | 1 | 1.43% |
| Masahiro Yamada | 1 | 0.01% | 1 | 1.43% |
| Alexis Bruemmer | 1 | 0.01% | 1 | 1.43% |
| Omar Sandoval | 1 | 0.01% | 1 | 1.43% |
| Joe Perches | 1 | 0.01% | 1 | 1.43% |
| Total | 7269 | 70 |
/* * 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 management * 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/jiffies.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/blkdev.h> #include <linux/bsg.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_request.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_sas.h> #include "scsi_sas_internal.h" struct sas_host_attrs { struct list_head rphy_list; struct mutex lock; struct request_queue *q; u32 next_target_id; u32 next_expander_id; int next_port_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_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ struct device_attribute dev_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 < ARRAY_SIZE(table); 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_set(title, table) \ static ssize_t \ set_sas_##title##_names(u32 *table_key, const char *buf) \ { \ ssize_t len = 0; \ int i; \ \ for (i = 0; i < ARRAY_SIZE(table); i++) { \ len = strlen(table[i].name); \ if (strncmp(buf, table[i].name, len) == 0 && \ (buf[len] == '\n' || buf[len] == '\0')) { \ *table_key = table[i].value; \ return 0; \ } \ } \ return -EINVAL; \ } #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 < ARRAY_SIZE(table); 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_LINK_RATE_12_0_GBPS, "12.0 Gbit" }, }; sas_bitfield_name_search(linkspeed, sas_linkspeed_names) sas_bitfield_name_set(linkspeed, sas_linkspeed_names) static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev) { struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target); struct sas_end_device *rdev; BUG_ON(rphy->identify.device_type != SAS_END_DEVICE); rdev = rphy_to_end_device(rphy); return rdev; } static int sas_smp_dispatch(struct bsg_job *job) { struct Scsi_Host *shost = dev_to_shost(job->dev); struct sas_rphy *rphy = NULL; if (!scsi_is_host_device(job->dev)) rphy = dev_to_rphy(job->dev); if (!job->reply_payload.payload_len) { dev_warn(job->dev, "space for a smp response is missing\n"); bsg_job_done(job, -EINVAL, 0); return 0; } to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy); return 0; } static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy) { struct request_queue *q; if (!to_sas_internal(shost->transportt)->f->smp_handler) { printk("%s can't handle SMP requests\n", shost->hostt->name); return 0; } if (rphy) { q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev), sas_smp_dispatch, NULL, 0); if (IS_ERR(q)) return PTR_ERR(q); rphy->q = q; } else { char name[20]; snprintf(name, sizeof(name), "sas_host%d", shost->host_no); q = bsg_setup_queue(&shost->shost_gendev, name, sas_smp_dispatch, NULL, 0); if (IS_ERR(q)) return PTR_ERR(q); to_sas_host_attrs(shost)->q = q; } blk_queue_flag_set(QUEUE_FLAG_BIDI, q); return 0; } /* * SAS host attributes */ static int sas_host_setup(struct transport_container *tc, struct device *dev, struct 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; sas_host->next_port_id = 0; if (sas_bsg_initialize(shost, NULL)) dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n", shost->host_no); return 0; } static int sas_host_remove(struct transport_container *tc, struct device *dev, struct device *cdev) { struct Scsi_Host *shost = dev_to_shost(dev); struct request_queue *q = to_sas_host_attrs(shost)->q; bsg_remove_queue(q); return 0; } static DECLARE_TRANSPORT_CLASS(sas_host_class, "sas_host", sas_host_setup, sas_host_remove, 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) { int pass = (int)(unsigned long)data; if (pass == 0 && scsi_is_sas_port(dev)) sas_port_delete(dev_to_sas_port(dev)); else if (pass == 1 && scsi_is_sas_phy(dev)) sas_phy_delete(dev_to_phy(dev)); return 0; } /** * sas_remove_children - tear down a devices SAS data structures * @dev: device belonging to the sas object * * Removes all SAS PHYs and remote PHYs for a given object */ void sas_remove_children(struct device *dev) { device_for_each_child(dev, (void *)0, do_sas_phy_delete); device_for_each_child(dev, (void *)1, do_sas_phy_delete); } EXPORT_SYMBOL(sas_remove_children); /** * 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 and remove the * Scsi_Host as well. * * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is * already removed. */ void sas_remove_host(struct Scsi_Host *shost) { sas_remove_children(&shost->shost_gendev); scsi_remove_host(shost); } EXPORT_SYMBOL(sas_remove_host); /** * sas_get_address - return the SAS address of the device * @sdev: scsi device * * Returns the SAS address of the scsi device */ u64 sas_get_address(struct scsi_device *sdev) { struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); return rdev->rphy.identify.sas_address; } EXPORT_SYMBOL(sas_get_address); /** * sas_tlr_supported - checking TLR bit in vpd 0x90 * @sdev: scsi device struct * * Check Transport Layer Retries are supported or not. * If vpd page 0x90 is present, TRL is supported. * */ unsigned int sas_tlr_supported(struct scsi_device *sdev) { const int vpd_len = 32; struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); char *buffer = kzalloc(vpd_len, GFP_KERNEL); int ret = 0; if (!buffer) goto out; if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len)) goto out; /* * Magic numbers: the VPD Protocol page (0x90) * has a 4 byte header and then one entry per device port * the TLR bit is at offset 8 on each port entry * if we take the first port, that's at total offset 12 */ ret = buffer[12] & 0x01; out: kfree(buffer); rdev->tlr_supported = ret; return ret; } EXPORT_SYMBOL_GPL(sas_tlr_supported); /** * sas_disable_tlr - setting TLR flags * @sdev: scsi device struct * * Seting tlr_enabled flag to 0. * */ void sas_disable_tlr(struct scsi_device *sdev) { struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); rdev->tlr_enabled = 0; } EXPORT_SYMBOL_GPL(sas_disable_tlr); /** * sas_enable_tlr - setting TLR flags * @sdev: scsi device struct * * Seting tlr_enabled flag 1. * */ void sas_enable_tlr(struct scsi_device *sdev) { unsigned int tlr_supported = 0; tlr_supported = sas_tlr_supported(sdev); if (tlr_supported) { struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); rdev->tlr_enabled = 1; } return; } EXPORT_SYMBOL_GPL(sas_enable_tlr); unsigned int sas_is_tlr_enabled(struct scsi_device *sdev) { struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); return rdev->tlr_enabled; } EXPORT_SYMBOL_GPL(sas_is_tlr_enabled); /* * SAS Phy attributes */ #define sas_phy_show_simple(field, name, format_string, cast) \ static ssize_t \ show_sas_phy_##name(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_phy *phy = transport_class_to_phy(dev); \ \ 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 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 device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_phy *phy = transport_class_to_phy(dev); \ \ 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 DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) #define sas_phy_show_linkspeed(field) \ static ssize_t \ show_sas_phy_##field(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_phy *phy = transport_class_to_phy(dev); \ \ return get_sas_linkspeed_names(phy->field, buf); \ } /* Fudge to tell if we're minimum or maximum */ #define sas_phy_store_linkspeed(field) \ static ssize_t \ store_sas_phy_##field(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t count) \ { \ struct sas_phy *phy = transport_class_to_phy(dev); \ struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ struct sas_internal *i = to_sas_internal(shost->transportt); \ u32 value; \ struct sas_phy_linkrates rates = {0}; \ int error; \ \ error = set_sas_linkspeed_names(&value, buf); \ if (error) \ return error; \ rates.field = value; \ error = i->f->set_phy_speed(phy, &rates); \ \ return error ? error : count; \ } #define sas_phy_linkspeed_rw_attr(field) \ sas_phy_show_linkspeed(field) \ sas_phy_store_linkspeed(field) \ static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \ store_sas_phy_##field) #define sas_phy_linkspeed_attr(field) \ sas_phy_show_linkspeed(field) \ static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) #define sas_phy_show_linkerror(field) \ static ssize_t \ show_sas_phy_##field(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_phy *phy = transport_class_to_phy(dev); \ struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ struct sas_internal *i = to_sas_internal(shost->transportt); \ int error; \ \ 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 DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) static ssize_t show_sas_device_type(struct device *dev, struct device_attribute *attr, char *buf) { struct sas_phy *phy = transport_class_to_phy(dev); if (!phy->identify.device_type) return snprintf(buf, 20, "none\n"); return get_sas_device_type_names(phy->identify.device_type, buf); } static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); static ssize_t do_sas_phy_enable(struct device *dev, size_t count, int enable) { struct sas_phy *phy = transport_class_to_phy(dev); struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); struct sas_internal *i = to_sas_internal(shost->transportt); int error; error = i->f->phy_enable(phy, enable); if (error) return error; phy->enabled = enable; return count; }; static ssize_t store_sas_phy_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { if (count < 1) return -EINVAL; switch (buf[0]) { case '0': do_sas_phy_enable(dev, count, 0); break; case '1': do_sas_phy_enable(dev, count, 1); break; default: return -EINVAL; } return count; } static ssize_t show_sas_phy_enable(struct device *dev, struct device_attribute *attr, char *buf) { struct sas_phy *phy = transport_class_to_phy(dev); return snprintf(buf, 20, "%d", phy->enabled); } static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable, store_sas_phy_enable); static ssize_t do_sas_phy_reset(struct device *dev, size_t count, int hard_reset) { struct sas_phy *phy = transport_class_to_phy(dev); struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); struct sas_internal *i = to_sas_internal(shost->transportt); int error; error = i->f->phy_reset(phy, hard_reset); if (error) return error; phy->enabled = 1; return count; }; static ssize_t store_sas_link_reset(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return do_sas_phy_reset(dev, count, 0); } static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); static ssize_t store_sas_hard_reset(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return do_sas_phy_reset(dev, count, 1); } static 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_linkspeed_attr(negotiated_linkrate); sas_phy_linkspeed_attr(minimum_linkrate_hw); sas_phy_linkspeed_rw_attr(minimum_linkrate); sas_phy_linkspeed_attr(maximum_linkrate_hw); sas_phy_linkspeed_rw_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 int sas_phy_setup(struct transport_container *tc, struct device *dev, struct device *cdev) { struct sas_phy *phy = dev_to_phy(dev); struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); struct sas_internal *i = to_sas_internal(shost->transportt); if (i->f->phy_setup) i->f->phy_setup(phy); return 0; } static DECLARE_TRANSPORT_CLASS(sas_phy_class, "sas_phy", sas_phy_setup, 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); struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); struct sas_internal *i = to_sas_internal(shost->transportt); if (i->f->phy_release) i->f->phy_release(phy); 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; phy->enabled = 1; device_initialize(&phy->dev); phy->dev.parent = get_device(parent); phy->dev.release = sas_phy_release; INIT_LIST_HEAD(&phy->port_siblings); if (scsi_is_sas_expander_device(parent)) { struct sas_rphy *rphy = dev_to_rphy(parent); dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no, rphy->scsi_target_id, number); } else dev_set_name(&phy->dev, "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 hierarchy * @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 * successfully 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; /* this happens if the phy is still part of a port when deleted */ BUG_ON(!list_empty(&phy->port_siblings)); 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 Port attributes */ #define sas_port_show_simple(field, name, format_string, cast) \ static ssize_t \ show_sas_port_##name(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_port *port = transport_class_to_sas_port(dev); \ \ return snprintf(buf, 20, format_string, cast port->field); \ } #define sas_port_simple_attr(field, name, format_string, type) \ sas_port_show_simple(field, name, format_string, (type)) \ static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL) sas_port_simple_attr(num_phys, num_phys, "%d\n", int); static DECLARE_TRANSPORT_CLASS(sas_port_class, "sas_port", NULL, NULL, NULL); static int sas_port_match(struct attribute_container *cont, struct device *dev) { struct Scsi_Host *shost; struct sas_internal *i; if (!scsi_is_sas_port(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->port_attr_cont.ac == cont; } static void sas_port_release(struct device *dev) { struct sas_port *port = dev_to_sas_port(dev); BUG_ON(!list_empty(&port->phy_list)); put_device(dev->parent); kfree(port); } static void sas_port_create_link(struct sas_port *port, struct sas_phy *phy) { int res; res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj, dev_name(&phy->dev)); if (res) goto err; res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port"); if (res) goto err; return; err: printk(KERN_ERR "%s: Cannot create port links, err=%d\n", __func__, res); } static void sas_port_delete_link(struct sas_port *port, struct sas_phy *phy) { sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev)); sysfs_remove_link(&phy->dev.kobj, "port"); } /** sas_port_alloc - allocate and initialize a SAS port structure * * @parent: parent device * @port_id: port number * * Allocates a SAS port structure. It will be added to the device tree * below the device specified by @parent which must be either a Scsi_Host * or a sas_expander_device. * * Returns %NULL on error */ struct sas_port *sas_port_alloc(struct device *parent, int port_id) { struct Scsi_Host *shost = dev_to_shost(parent); struct sas_port *port; port = kzalloc(sizeof(*port), GFP_KERNEL); if (!port) return NULL; port->port_identifier = port_id; device_initialize(&port->dev); port->dev.parent = get_device(parent); port->dev.release = sas_port_release; mutex_init(&port->phy_list_mutex); INIT_LIST_HEAD(&port->phy_list); if (scsi_is_sas_expander_device(parent)) { struct sas_rphy *rphy = dev_to_rphy(parent); dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no, rphy->scsi_target_id, port->port_identifier); } else dev_set_name(&port->dev, "port-%d:%d", shost->host_no, port->port_identifier); transport_setup_device(&port->dev); return port; } EXPORT_SYMBOL(sas_port_alloc); /** sas_port_alloc_num - allocate and initialize a SAS port structure * * @parent: parent device * * Allocates a SAS port structure and a number to go with it. This * interface is really for adapters where the port number has no * meansing, so the sas class should manage them. It will be added to * the device tree below the device specified by @parent which must be * either a Scsi_Host or a sas_expander_device. * * Returns %NULL on error */ struct sas_port *sas_port_alloc_num(struct device *parent) { int index; struct Scsi_Host *shost = dev_to_shost(parent); struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); /* FIXME: use idr for this eventually */ mutex_lock(&sas_host->lock); if (scsi_is_sas_expander_device(parent)) { struct sas_rphy *rphy = dev_to_rphy(parent); struct sas_expander_device *exp = rphy_to_expander_device(rphy); index = exp->next_port_id++; } else index = sas_host->next_port_id++; mutex_unlock(&sas_host->lock); return sas_port_alloc(parent, index); } EXPORT_SYMBOL(sas_port_alloc_num); /** * sas_port_add - add a SAS port to the device hierarchy * @port: port to be added * * publishes a port to the rest of the system */ int sas_port_add(struct sas_port *port) { int error; /* No phys should be added until this is made visible */ BUG_ON(!list_empty(&port->phy_list)); error = device_add(&port->dev); if (error) return error; transport_add_device(&port->dev); transport_configure_device(&port->dev); return 0; } EXPORT_SYMBOL(sas_port_add); /** * sas_port_free - free a SAS PORT * @port: SAS PORT to free * * Frees the specified SAS PORT. * * Note: * This function must only be called on a PORT that has not * successfully been added using sas_port_add(). */ void sas_port_free(struct sas_port *port) { transport_destroy_device(&port->dev); put_device(&port->dev); } EXPORT_SYMBOL(sas_port_free); /** * sas_port_delete - remove SAS PORT * @port: SAS PORT to remove * * Removes the specified SAS PORT. If the SAS PORT has an * associated phys, unlink them from the port as well. */ void sas_port_delete(struct sas_port *port) { struct device *dev = &port->dev; struct sas_phy *phy, *tmp_phy; if (port->rphy) { sas_rphy_delete(port->rphy); port->rphy = NULL; } mutex_lock(&port->phy_list_mutex); list_for_each_entry_safe(phy, tmp_phy, &port->phy_list, port_siblings) { sas_port_delete_link(port, phy); list_del_init(&phy->port_siblings); } mutex_unlock(&port->phy_list_mutex); if (port->is_backlink) { struct device *parent = port->dev.parent; sysfs_remove_link(&port->dev.kobj, dev_name(parent)); port->is_backlink = 0; } transport_remove_device(dev); device_del(dev); transport_destroy_device(dev); put_device(dev); } EXPORT_SYMBOL(sas_port_delete); /** * scsi_is_sas_port - check if a struct device represents a SAS port * @dev: device to check * * Returns: * %1 if the device represents a SAS Port, %0 else */ int scsi_is_sas_port(const struct device *dev) { return dev->release == sas_port_release; } EXPORT_SYMBOL(scsi_is_sas_port); /** * sas_port_get_phy - try to take a reference on a port member * @port: port to check */ struct sas_phy *sas_port_get_phy(struct sas_port *port) { struct sas_phy *phy; mutex_lock(&port->phy_list_mutex); if (list_empty(&port->phy_list)) phy = NULL; else { struct list_head *ent = port->phy_list.next; phy = list_entry(ent, typeof(*phy), port_siblings); get_device(&phy->dev); } mutex_unlock(&port->phy_list_mutex); return phy; } EXPORT_SYMBOL(sas_port_get_phy); /** * sas_port_add_phy - add another phy to a port to form a wide port * @port: port to add the phy to * @phy: phy to add * * When a port is initially created, it is empty (has no phys). All * ports must have at least one phy to operated, and all wide ports * must have at least two. The current code makes no difference * between ports and wide ports, but the only object that can be * connected to a remote device is a port, so ports must be formed on * all devices with phys if they're connected to anything. */ void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy) { mutex_lock(&port->phy_list_mutex); if (unlikely(!list_empty(&phy->port_siblings))) { /* make sure we're already on this port */ struct sas_phy *tmp; list_for_each_entry(tmp, &port->phy_list, port_siblings) if (tmp == phy) break; /* If this trips, you added a phy that was already * part of a different port */ if (unlikely(tmp != phy)) { dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", dev_name(&phy->dev)); BUG(); } } else { sas_port_create_link(port, phy); list_add_tail(&phy->port_siblings, &port->phy_list); port->num_phys++; } mutex_unlock(&port->phy_list_mutex); } EXPORT_SYMBOL(sas_port_add_phy); /** * sas_port_delete_phy - remove a phy from a port or wide port * @port: port to remove the phy from * @phy: phy to remove * * This operation is used for tearing down ports again. It must be * done to every port or wide port before calling sas_port_delete. */ void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy) { mutex_lock(&port->phy_list_mutex); sas_port_delete_link(port, phy); list_del_init(&phy->port_siblings); port->num_phys--; mutex_unlock(&port->phy_list_mutex); } EXPORT_SYMBOL(sas_port_delete_phy); void sas_port_mark_backlink(struct sas_port *port) { int res; struct device *parent = port->dev.parent->parent->parent; if (port->is_backlink) return; port->is_backlink = 1; res = sysfs_create_link(&port->dev.kobj, &parent->kobj, dev_name(parent)); if (res) goto err; return; err: printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n", __func__, res); } EXPORT_SYMBOL(sas_port_mark_backlink); /* * SAS remote PHY attributes. */ #define sas_rphy_show_simple(field, name, format_string, cast) \ static ssize_t \ show_sas_rphy_##name(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_rphy *rphy = transport_class_to_rphy(dev); \ \ 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_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 device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_rphy *rphy = transport_class_to_rphy(dev); \ \ 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_DEVICE_ATTR(rphy, name, S_IRUGO, \ show_sas_rphy_##name, NULL) static ssize_t show_sas_rphy_device_type(struct device *dev, struct device_attribute *attr, char *buf) { struct sas_rphy *rphy = transport_class_to_rphy(dev); if (!rphy->identify.device_type) return snprintf(buf, 20, "none\n"); return get_sas_device_type_names( rphy->identify.device_type, buf); } static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO, show_sas_rphy_device_type, NULL); static ssize_t show_sas_rphy_enclosure_identifier(struct device *dev, struct device_attribute *attr, char *buf) { struct sas_rphy *rphy = transport_class_to_rphy(dev); 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; error = i->f->get_enclosure_identifier(rphy, &identifier); if (error) return error; return sprintf(buf, "0x%llx\n", (unsigned long long)identifier); } static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO, show_sas_rphy_enclosure_identifier, NULL); static ssize_t show_sas_rphy_bay_identifier(struct device *dev, struct device_attribute *attr, char *buf) { struct sas_rphy *rphy = transport_class_to_rphy(dev); 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; val = i->f->get_bay_identifier(rphy); if (val < 0) return val; return sprintf(buf, "%d\n", val); } static SAS_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); sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32); /* 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_end_device *rdev = sas_sdev_to_rdev(sdev); struct scsi_mode_data mode_data; int res, error; 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 device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_rphy *rphy = transport_class_to_rphy(dev); \ 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_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); sas_end_dev_simple_attr(tlr_supported, tlr_supported, "%d\n", int); sas_end_dev_simple_attr(tlr_enabled, tlr_enabled, "%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 device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct sas_rphy *rphy = transport_class_to_rphy(dev); \ 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_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); if (rphy->q) blk_cleanup_queue(rphy->q); 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); if (rphy->q) blk_cleanup_queue(rphy->q); put_device(dev->parent); kfree(edev); } /** * sas_rphy_initialize - common rphy initialization * @rphy: rphy to initialise * * Used by both sas_end_device_alloc() and sas_expander_alloc() to * initialise the common rphy component of each. */ static void sas_rphy_initialize(struct sas_rphy *rphy) { INIT_LIST_HEAD(&rphy->list); } /** * sas_end_device_alloc - allocate an rphy for an end device * @parent: which port * * 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_port *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; if (scsi_is_sas_expander_device(parent->dev.parent)) { struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent); dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d", shost->host_no, rphy->scsi_target_id, parent->port_identifier); } else dev_set_name(&rdev->rphy.dev, "end_device-%d:%d", shost->host_no, parent->port_identifier); rdev->rphy.identify.device_type = SAS_END_DEVICE; sas_rphy_initialize(&rdev->rphy); 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 * @parent: which port * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_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_port *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); dev_set_name(&rdev->rphy.dev, "expander-%d:%d", shost->host_no, rdev->rphy.scsi_target_id); rdev->rphy.identify.device_type = type; sas_rphy_initialize(&rdev->rphy); 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 hierarchy * @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_port *parent = dev_to_sas_port(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); if (sas_bsg_initialize(shost, rphy)) printk("fail to a bsg device %s\n", dev_name(&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) { int lun; if (identify->target_port_protocols & SAS_PROTOCOL_SSP) lun = SCAN_WILD_CARD; else lun = 0; scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, SCSI_SCAN_INITIAL); } 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 successfully been added using * sas_rphy_add() (or has been sas_rphy_remove()'d) */ 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 and free SAS remote PHY * @rphy: SAS remote PHY to remove and free * * Removes the specified SAS remote PHY and frees it. */ void sas_rphy_delete(struct sas_rphy *rphy) { sas_rphy_remove(rphy); sas_rphy_free(rphy); } EXPORT_SYMBOL(sas_rphy_delete); /** * sas_rphy_unlink - unlink SAS remote PHY * @rphy: SAS remote phy to unlink from its parent port * * Removes port reference to an rphy */ void sas_rphy_unlink(struct sas_rphy *rphy) { struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); parent->rphy = NULL; } EXPORT_SYMBOL(sas_rphy_unlink); /** * sas_rphy_remove - remove SAS remote PHY * @rphy: SAS remote phy to remove * * Removes the specified SAS remote PHY. */ void sas_rphy_remove(struct sas_rphy *rphy) { struct device *dev = &rphy->dev; switch (rphy->identify.device_type) { case SAS_END_DEVICE: scsi_remove_target(dev); break; case SAS_EDGE_EXPANDER_DEVICE: case SAS_FANOUT_EXPANDER_DEVICE: sas_remove_children(dev); break; default: break; } sas_rphy_unlink(rphy); if (rphy->q) bsg_unregister_queue(rphy->q); transport_remove_device(dev); device_del(dev); } EXPORT_SYMBOL(sas_rphy_remove); /** * 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, u64 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) { if (rphy->identify.device_type != SAS_END_DEVICE || rphy->scsi_target_id == -1) continue; if ((channel == SCAN_WILD_CARD || channel == 0) && (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) { scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, SCSI_SCAN_MANUAL); } } mutex_unlock(&sas_host->lock); return 0; } /* * Setup / Teardown code */ #define SETUP_TEMPLATE(attrb, field, perm, test) \ i->private_##attrb[count] = dev_attr_##field; \ i->private_##attrb[count].attr.mode = perm; \ i->attrb[count] = &i->private_##attrb[count]; \ if (test) \ count++ #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \ i->private_##attrb[count] = dev_attr_##field; \ i->private_##attrb[count].attr.mode = perm; \ if (ro_test) { \ i->private_##attrb[count].attr.mode = ro_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_PHY_ATTRIBUTE(field) \ SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1) #define SETUP_PHY_ATTRIBUTE_RW(field) \ SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \ !i->f->set_phy_speed, S_IRUGO) #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \ SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \ !i->f->func, S_IRUGO) #define SETUP_PORT_ATTRIBUTE(field) \ SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \ SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func) #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \ SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1) #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \ SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 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->port_attr_cont.ac.class = &sas_port_class.class; i->port_attr_cont.ac.attrs = &i->port_attrs[0]; i->port_attr_cont.ac.match = sas_port_match; transport_container_register(&i->port_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; SETUP_PHY_ATTRIBUTE(initiator_port_protocols); SETUP_PHY_ATTRIBUTE(target_port_protocols); SETUP_PHY_ATTRIBUTE(device_type); SETUP_PHY_ATTRIBUTE(sas_address); SETUP_PHY_ATTRIBUTE(phy_identifier); SETUP_PHY_ATTRIBUTE(negotiated_linkrate); SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw); SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate); SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw); SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate); SETUP_PHY_ATTRIBUTE(invalid_dword_count); SETUP_PHY_ATTRIBUTE(running_disparity_error_count); SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count); SETUP_PHY_ATTRIBUTE(phy_reset_problem_count); SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset); SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset); SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable); i->phy_attrs[count] = NULL; count = 0; SETUP_PORT_ATTRIBUTE(num_phys); i->port_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_RPORT_ATTRIBUTE(rphy_scsi_target_id); 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); SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported); SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled); 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->port_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_port_class); if (error) goto out_unregister_phy; error = transport_class_register(&sas_rphy_class); if (error) goto out_unregister_port; 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_port: transport_class_unregister(&sas_port_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_port_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 Transport Attributes"); MODULE_LICENSE("GPL"); module_init(sas_transport_init); module_exit(sas_transport_exit);
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