diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_sysfs_adapter.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs_adapter.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_sysfs_adapter.c b/drivers/s390/scsi/zfcp_sysfs_adapter.c new file mode 100644 index 000000000000..ff28ade1dfc7 --- /dev/null +++ b/drivers/s390/scsi/zfcp_sysfs_adapter.c @@ -0,0 +1,298 @@ +/* + * linux/drivers/s390/scsi/zfcp_sysfs_adapter.c + * + * FCP adapter driver for IBM eServer zSeries + * + * sysfs adapter related routines + * + * (C) Copyright IBM Corp. 2003, 2004 + * + * Authors: + * Martin Peschke <mpeschke@de.ibm.com> + * Heiko Carstens <heiko.carstens@de.ibm.com> + * Andreas Herrmann <aherrman@de.ibm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#define ZFCP_SYSFS_ADAPTER_C_REVISION "$Revision: 1.38 $" + +#include "zfcp_ext.h" + +#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG + +static const char fc_topologies[5][25] = { + "<error>", + "point-to-point", + "fabric", + "arbitrated loop", + "fabric (virt. adapter)" +}; + +/** + * ZFCP_DEFINE_ADAPTER_ATTR + * @_name: name of show attribute + * @_format: format string + * @_value: value to print + * + * Generates attributes for an adapter. + */ +#define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value) \ +static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \ + char *buf) \ +{ \ + struct zfcp_adapter *adapter; \ + \ + adapter = dev_get_drvdata(dev); \ + return sprintf(buf, _format, _value); \ +} \ + \ +static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL); + +ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status)); +ZFCP_DEFINE_ADAPTER_ATTR(wwnn, "0x%016llx\n", adapter->wwnn); +ZFCP_DEFINE_ADAPTER_ATTR(wwpn, "0x%016llx\n", adapter->wwpn); +ZFCP_DEFINE_ADAPTER_ATTR(s_id, "0x%06x\n", adapter->s_id); +ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version); +ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version); +ZFCP_DEFINE_ADAPTER_ATTR(fc_link_speed, "%d Gb/s\n", adapter->fc_link_speed); +ZFCP_DEFINE_ADAPTER_ATTR(fc_service_class, "%d\n", adapter->fc_service_class); +ZFCP_DEFINE_ADAPTER_ATTR(fc_topology, "%s\n", + fc_topologies[adapter->fc_topology]); +ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n", + adapter->hardware_version); +ZFCP_DEFINE_ADAPTER_ATTR(serial_number, "%17s\n", adapter->serial_number); +ZFCP_DEFINE_ADAPTER_ATTR(scsi_host_no, "0x%x\n", adapter->scsi_host_no); +ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask + (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)); + +/** + * zfcp_sysfs_port_add_store - add a port to sysfs tree + * @dev: pointer to belonging device + * @buf: pointer to input buffer + * @count: number of bytes in buffer + * + * Store function of the "port_add" attribute of an adapter. + */ +static ssize_t +zfcp_sysfs_port_add_store(struct device *dev, const char *buf, size_t count) +{ + wwn_t wwpn; + char *endp; + struct zfcp_adapter *adapter; + struct zfcp_port *port; + int retval = -EINVAL; + + down(&zfcp_data.config_sema); + + adapter = dev_get_drvdata(dev); + if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { + retval = -EBUSY; + goto out; + } + + wwpn = simple_strtoull(buf, &endp, 0); + if ((endp + 1) < (buf + count)) + goto out; + + port = zfcp_port_enqueue(adapter, wwpn, 0, 0); + if (!port) + goto out; + + retval = 0; + + zfcp_erp_port_reopen(port, 0); + zfcp_erp_wait(port->adapter); + zfcp_port_put(port); + out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} + +static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store); + +/** + * zfcp_sysfs_port_remove_store - remove a port from sysfs tree + * @dev: pointer to belonging device + * @buf: pointer to input buffer + * @count: number of bytes in buffer + * + * Store function of the "port_remove" attribute of an adapter. + */ +static ssize_t +zfcp_sysfs_port_remove_store(struct device *dev, const char *buf, size_t count) +{ + struct zfcp_adapter *adapter; + struct zfcp_port *port; + wwn_t wwpn; + char *endp; + int retval = 0; + + down(&zfcp_data.config_sema); + + adapter = dev_get_drvdata(dev); + if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { + retval = -EBUSY; + goto out; + } + + wwpn = simple_strtoull(buf, &endp, 0); + if ((endp + 1) < (buf + count)) { + retval = -EINVAL; + goto out; + } + + write_lock_irq(&zfcp_data.config_lock); + port = zfcp_get_port_by_wwpn(adapter, wwpn); + if (port && (atomic_read(&port->refcount) == 0)) { + zfcp_port_get(port); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); + list_move(&port->list, &adapter->port_remove_lh); + } + else { + port = NULL; + } + write_unlock_irq(&zfcp_data.config_lock); + + if (!port) { + retval = -ENXIO; + goto out; + } + + zfcp_erp_port_shutdown(port, 0); + zfcp_erp_wait(adapter); + zfcp_port_put(port); + zfcp_port_dequeue(port); + out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} + +static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store); + +/** + * zfcp_sysfs_adapter_failed_store - failed state of adapter + * @dev: pointer to belonging device + * @buf: pointer to input buffer + * @count: number of bytes in buffer + * + * Store function of the "failed" attribute of an adapter. + * If a "0" gets written to "failed", error recovery will be + * started for the belonging adapter. + */ +static ssize_t +zfcp_sysfs_adapter_failed_store(struct device *dev, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter; + unsigned int val; + char *endp; + int retval = 0; + + down(&zfcp_data.config_sema); + + adapter = dev_get_drvdata(dev); + if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { + retval = -EBUSY; + goto out; + } + + val = simple_strtoul(buf, &endp, 0); + if (((endp + 1) < (buf + count)) || (val != 0)) { + retval = -EINVAL; + goto out; + } + + zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING, + ZFCP_SET); + zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED); + zfcp_erp_wait(adapter); + out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} + +/** + * zfcp_sysfs_adapter_failed_show - failed state of adapter + * @dev: pointer to belonging device + * @buf: pointer to input buffer + * + * Show function of "failed" attribute of adapter. Will be + * "0" if adapter is working, otherwise "1". + */ +static ssize_t +zfcp_sysfs_adapter_failed_show(struct device *dev, char *buf) +{ + struct zfcp_adapter *adapter; + + adapter = dev_get_drvdata(dev); + if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) + return sprintf(buf, "1\n"); + else + return sprintf(buf, "0\n"); +} + +static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show, + zfcp_sysfs_adapter_failed_store); + +static struct attribute *zfcp_adapter_attrs[] = { + &dev_attr_failed.attr, + &dev_attr_in_recovery.attr, + &dev_attr_port_remove.attr, + &dev_attr_port_add.attr, + &dev_attr_wwnn.attr, + &dev_attr_wwpn.attr, + &dev_attr_s_id.attr, + &dev_attr_card_version.attr, + &dev_attr_lic_version.attr, + &dev_attr_fc_link_speed.attr, + &dev_attr_fc_service_class.attr, + &dev_attr_fc_topology.attr, + &dev_attr_scsi_host_no.attr, + &dev_attr_status.attr, + &dev_attr_hardware_version.attr, + &dev_attr_serial_number.attr, + NULL +}; + +static struct attribute_group zfcp_adapter_attr_group = { + .attrs = zfcp_adapter_attrs, +}; + +/** + * zfcp_sysfs_create_adapter_files - create sysfs adapter files + * @dev: pointer to belonging device + * + * Create all attributes of the sysfs representation of an adapter. + */ +int +zfcp_sysfs_adapter_create_files(struct device *dev) +{ + return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group); +} + +/** + * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files + * @dev: pointer to belonging device + * + * Remove all attributes of the sysfs representation of an adapter. + */ +void +zfcp_sysfs_adapter_remove_files(struct device *dev) +{ + sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group); +} + +#undef ZFCP_LOG_AREA |