/* * 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 * Heiko Carstens * Andreas Herrmann * * 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. */ #include "zfcp_ext.h" #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG /** * 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, struct device_attribute *attr, \ 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(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn); ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn); ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_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(hardware_version, "0x%08x\n", adapter->hardware_version); 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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_peer_wwnn.attr, &dev_attr_peer_wwpn.attr, &dev_attr_peer_d_id.attr, &dev_attr_card_version.attr, &dev_attr_lic_version.attr, &dev_attr_status.attr, &dev_attr_hardware_version.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