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