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path: root/drivers/s390/scsi/zfcp_sysfs_adapter.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_sysfs_adapter.c')
-rw-r--r--drivers/s390/scsi/zfcp_sysfs_adapter.c298
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 00000000000..ff28ade1dfc
--- /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
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 21:39:54 +0000