Archipelago » qemu

/*

 * Channel subsystem structures and definitions.

 *

 * Copyright 2012 IBM Corp.

 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or (at

 * your option) any later version. See the COPYING file in the top-level

 * directory.

 */

#ifndef CSS_H

#define CSS_H

#include "ioinst.h"

/* Channel subsystem constants. */

#define MAX_SCHID 65535

#define MAX_SSID 3

#define MAX_CSSID 254 /* 255 is reserved */

#define MAX_CHPID 255

#define MAX_CIWS 62

typedef struct CIW {

    uint8_t type;

    uint8_t command;

    uint16_t count;

} QEMU_PACKED CIW;

typedef struct SenseId {

    /* common part */

    uint8_t reserved;        /* always 0x'FF' */

    uint16_t cu_type;        /* control unit type */

    uint8_t cu_model;        /* control unit model */

    uint16_t dev_type;       /* device type */

    uint8_t dev_model;       /* device model */

    uint8_t unused;          /* padding byte */

    /* extended part */

    CIW ciw[MAX_CIWS];       /* variable # of CIWs */

} QEMU_PACKED SenseId;

/* Channel measurements, from linux/drivers/s390/cio/cmf.c. */

typedef struct CMB {

    uint16_t ssch_rsch_count;

    uint16_t sample_count;

    uint32_t device_connect_time;

    uint32_t function_pending_time;

    uint32_t device_disconnect_time;

    uint32_t control_unit_queuing_time;

    uint32_t device_active_only_time;

    uint32_t reserved[2];

} QEMU_PACKED CMB;

typedef struct CMBE {

    uint32_t ssch_rsch_count;

    uint32_t sample_count;

    uint32_t device_connect_time;

    uint32_t function_pending_time;

    uint32_t device_disconnect_time;

    uint32_t control_unit_queuing_time;

    uint32_t device_active_only_time;

    uint32_t device_busy_time;

    uint32_t initial_command_response_time;

    uint32_t reserved[7];

} QEMU_PACKED CMBE;

struct SubchDev {

    /* channel-subsystem related things: */

    uint8_t cssid;

    uint8_t ssid;

    uint16_t schid;

    uint16_t devno;

    SCHIB curr_status;

    uint8_t sense_data[32];

    hwaddr channel_prog;

    CCW1 last_cmd;

    bool last_cmd_valid;

    ORB *orb;

    /* transport-provided data: */

    int (*ccw_cb) (SubchDev *, CCW1);

    SenseId id;

    void *driver_data;

};

typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,

                                       uint16_t schid);

int css_create_css_image(uint8_t cssid, bool default_image);

bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);

void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,

                      uint16_t devno, SubchDev *sch);

void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);

uint16_t css_build_subchannel_id(SubchDev *sch);

void css_reset(void);

void css_reset_sch(SubchDev *sch);

void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);

void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,

                           int hotplugged, int add);

void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);

#endif