linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

/*

 *    Copyright IBM Corp. 2007, 2010

 *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>

 */

​

#ifndef S390_CHP_H

#define S390_CHP_H

​

#include <linux/types.h>

#include <linux/device.h>

#include <linux/mutex.h>

#include <asm/chpid.h>

#include "chsc.h"

#include "css.h"

​

#define CHP_STATUS_STANDBY      0

#define CHP_STATUS_CONFIGURED       1

#define CHP_STATUS_RESERVED     2

#define CHP_STATUS_NOT_RECOGNIZED   3

​

#define CHP_ONLINE 0

#define CHP_OFFLINE 1

#define CHP_VARY_ON 2

#define CHP_VARY_OFF 3

​

struct chp_link {

    struct chp_id chpid;

    u32 fla_mask;

    u16 fla;

};

​

static inline int chp_test_bit(u8 *bitmap, int num)

{

    int byte = num >> 3;

    int mask = 128 >> (num & 7);

​

    return (bitmap[byte] & mask) ? 1 : 0;

}

​

​

struct channel_path {

    struct device dev;

    struct chp_id chpid;

    struct mutex lock; /* Serialize access to below members. */

    int state;

    struct channel_path_desc_fmt0 desc;

    struct channel_path_desc_fmt1 desc_fmt1;

    struct channel_path_desc_fmt3 desc_fmt3;

    /* Channel-measurement related stuff: */

    int cmg;

    int shared;

    struct cmg_chars cmg_chars;

};

​

/* Return channel_path struct for given chpid. */

static inline struct channel_path *chpid_to_chp(struct chp_id chpid)

{

    return css_by_id(chpid.cssid)->chps[chpid.id];

}

​

int chp_get_status(struct chp_id chpid);

u8 chp_get_sch_opm(struct subchannel *sch);