/* SPDX-License-Identifier: GPL-2.0 */ /* * zfcp device driver * * Definitions for handling diagnostics in the zfcp device driver. * * Copyright IBM Corp. 2018, 2020
*/
#ifndef ZFCP_DIAG_H #define ZFCP_DIAG_H
#include <linux/spinlock.h>
#include"zfcp_fsf.h" #include"zfcp_def.h"
/** * struct zfcp_diag_header - general part of a diagnostic buffer. * @access_lock: lock protecting all the data in this buffer. * @updating: flag showing that an update for this buffer is currently running. * @incomplete: flag showing that the data in @buffer is incomplete. * @timestamp: time in jiffies when the data of this buffer was last captured. * @buffer: implementation-depending data of this buffer * @buffer_size: size of @buffer
*/ struct zfcp_diag_header {
spinlock_t access_lock;
/* Flags */
u64 updating :1;
u64 incomplete :1;
unsignedlong timestamp;
void *buffer;
size_t buffer_size;
};
/** * struct zfcp_diag_adapter - central storage for all diagnostics concerning an * adapter. * @max_age: maximum age of data in diagnostic buffers before they need to be * refreshed (in ms). * @port_data: data retrieved using exchange port data. * @port_data.header: header with metadata for the cache in @port_data.data. * @port_data.data: cached QTCB Bottom of command exchange port data. * @config_data: data retrieved using exchange config data. * @config_data.header: header with metadata for the cache in @config_data.data. * @config_data.data: cached QTCB Bottom of command exchange config data.
*/ struct zfcp_diag_adapter { unsignedlong max_age;
/* * Function-Type used in zfcp_diag_update_buffer_limited() for the function * that does the buffer-implementation dependent work.
*/ typedefint (*zfcp_diag_update_buffer_func)(struct zfcp_adapter *const adapter);
int zfcp_diag_update_config_data_buffer(struct zfcp_adapter *const adapter); int zfcp_diag_update_port_data_buffer(struct zfcp_adapter *const adapter); int zfcp_diag_update_buffer_limited(struct zfcp_adapter *const adapter, struct zfcp_diag_header *const hdr,
zfcp_diag_update_buffer_func buffer_update);
/** * zfcp_diag_support_sfp() - Return %true if the @adapter supports reporting * SFP Data. * @adapter: adapter to test the availability of SFP Data reporting for.
*/ staticinlinebool
zfcp_diag_support_sfp(conststruct zfcp_adapter *const adapter)
{ return !!(adapter->adapter_features & FSF_FEATURE_REPORT_SFP_DATA);
}
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