vlib_sysfs.h

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/* SPDX-License-Identifier: EPL-1.0 */
/*
 * Copyright IBM Corp. 2010, 2024.
 *
 * Authors:             Sven Schuetz <sven@de.ibm.com>
 *                      contains code from vlib_aux.h
 *                      by Andreas Herrmann and Stefan Voelkel
 *
 * File:                vlib_sysfs.h
 *
 * Description:
 * Function declarations and inline functions that use the sysfs.
 *
 */
 
#ifndef _VLIB_SYSFS_H_
#define _VLIB_SYSFS_H_
 
 
#define ZFCP_SYSFS_PATH "/sys/bus/ccw/drivers/zfcp"
#define FC_HOST_PATH "/sys/class/fc_host"
 
#define ATTR_MAX 80 /* all attributes are only one line */
#define DEVNO_LENGTH 8  /* x.x.xxxx -> 8 chars */
 
HBA_STATUS sysfs_createAndReadConfigPorts(struct vlib_adapter *);
HBA_STATUS sysfs_createAndReadConfigAdapter();
HBA_STATUS sysfs_getDiscoveredPortAttributes(HBA_PORTATTRIBUTES **,
                                                struct vlib_port *);
HBA_STATUS sysfs_getAdapterPortAttributes(HBA_PORTATTRIBUTES **,
                                                struct vlib_adapter *);
HBA_STATUS sysfs_getAdapterAttributes(HBA_ADAPTERATTRIBUTES **,
                                                struct vlib_adapter *);
HBA_STATUS sysfs_getPortStatistics(HBA_PORTSTATISTICS **,
                                                struct vlib_adapter *);
int sysfs_getUnitsFromPort(struct vlib_port *);
void sysfs_waitForSgDev(char *);
 
static inline HBA_STATUS revalidateRepository(void)
{
        if (!vlib_data.isLoaded)
                return HBA_STATUS_ERROR;
 
        if (!vlib_data.isValid) {
                if (sysfs_createAndReadConfigAdapter() != HBA_STATUS_OK)
                        return HBA_STATUS_ERROR;
        }
 
        return HBA_STATUS_OK;
}
 
static inline int revalidatePorts(struct vlib_adapter *adapter)
{
        if (0 == adapter->ports.allocated)
                return sysfs_createAndReadConfigPorts(adapter);
 
        return 0;
}
 
static inline int revalidateUnits(struct vlib_port *port)
{
        if (0 == port->units.allocated)
                return sysfs_getUnitsFromPort(port);
 
        return 0;
}
 
#endif /*_VLIB_SYSFS_H_*/