/* 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 ;
unsigned long 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 {
unsigned long max_age;
struct zfcp_diag_adapter_port_data {
struct zfcp_diag_header header;
struct fsf_qtcb_bottom_port data;
} port_data;
struct zfcp_diag_adapter_config_data {
struct zfcp_diag_header header;
struct fsf_qtcb_bottom_config data;
} config_data;
};
int zfcp_diag_adapter_setup(struct zfcp_adapter *const adapter);
void zfcp_diag_adapter_free(struct zfcp_adapter *const adapter);
void zfcp_diag_update_xdata(struct zfcp_diag_header *const hdr,
const void *const data, const bool incomplete);
/*
* Function - Type used in zfcp_diag_update_buffer_limited ( ) for the function
* that does the buffer - implementation dependent work .
*/
typedef int (*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 .
*/
static inline bool
zfcp_diag_support_sfp(const struct zfcp_adapter *const adapter)
{
return !!(adapter->adapter_features & FSF_FEATURE_REPORT_SFP_DATA);
}
#endif /* ZFCP_DIAG_H */
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