Commit ff20b0a3 authored by Yang Chen's avatar Yang Chen Committed by Cornelia Huck
Browse files

s390x/3270: Add abstract emulated ccw-attached 3270 device 



This introduces the infrastructure for the emulated 3270
devices, which will be attached to the virtual-css-bus.

Signed-off-by: default avatarYang Chen <bjcyang@linux.vnet.ibm.com>
Signed-off-by: default avatarJing Liu <liujbjl@linux.vnet.ibm.com>
Reviewed-by: default avatarQingFeng Hao <haoqf@linux.vnet.ibm.com>
Reviewed-by: default avatarDong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
parent 6c15e9bf

hw/s390x/3270-ccw.c

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+99 −0
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/*

 * Emulated ccw-attached 3270 implementation

 *

 * Copyright 2017 IBM Corp.

 * Author(s): Yang Chen <bjcyang@linux.vnet.ibm.com>

 *            Jing Liu <liujbjl@linux.vnet.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.

 */

#include "qemu/osdep.h"

#include "qapi/error.h"

#include "qemu/module.h"

#include "cpu.h"

#include "hw/s390x/css.h"

#include "hw/s390x/css-bridge.h"

#include "hw/s390x/3270-ccw.h"



static void emulated_ccw_3270_realize(DeviceState *ds, Error **errp)

{

    uint16_t chpid;

    EmulatedCcw3270Device *dev = EMULATED_CCW_3270(ds);

    EmulatedCcw3270Class *ck = EMULATED_CCW_3270_GET_CLASS(dev);

    CcwDevice *cdev = CCW_DEVICE(ds);

    CCWDeviceClass *cdk = CCW_DEVICE_GET_CLASS(cdev);

    SubchDev *sch = css_create_virtual_sch(cdev->devno, errp);

    Error *err = NULL;



    if (!sch) {

        return;

    }



    if (!ck->init) {

        goto out_err;

    }



    sch->driver_data = dev;

    cdev->sch = sch;

    chpid = css_find_free_chpid(sch->cssid);



    if (chpid > MAX_CHPID) {

        error_setg(&err, "No available chpid to use.");

        goto out_err;

    }



    sch->id.reserved = 0xff;

    sch->id.cu_type = EMULATED_CCW_3270_CU_TYPE;

    css_sch_build_virtual_schib(sch, (uint8_t)chpid,

                                EMULATED_CCW_3270_CHPID_TYPE);



    ck->init(dev, &err);

    if (err) {

        goto out_err;

    }



    cdk->realize(cdev, &err);

    if (err) {

        goto out_err;

    }



    return;



out_err:

    error_propagate(errp, err);

    css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);

    cdev->sch = NULL;

    g_free(sch);

}



static Property emulated_ccw_3270_properties[] = {

    DEFINE_PROP_END_OF_LIST(),

};



static void emulated_ccw_3270_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);



    dc->props = emulated_ccw_3270_properties;

    dc->bus_type = TYPE_VIRTUAL_CSS_BUS;

    dc->realize = emulated_ccw_3270_realize;

    dc->hotpluggable = false;

}



static const TypeInfo emulated_ccw_3270_info = {

    .name = TYPE_EMULATED_CCW_3270,

    .parent = TYPE_CCW_DEVICE,

    .instance_size = sizeof(EmulatedCcw3270Device),

    .class_init = emulated_ccw_3270_class_init,

    .class_size = sizeof(EmulatedCcw3270Class),

    .abstract = true,

};



static void emulated_ccw_register(void)

{

    type_register_static(&emulated_ccw_3270_info);

}



type_init(emulated_ccw_register)

hw/s390x/Makefile.objs

+1 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ obj-y += sclpcpu.o 
obj-y += ipl.o

obj-y += css.o

obj-y += s390-virtio-ccw.o

obj-y += 3270-ccw.o

obj-y += virtio-ccw.o

obj-y += css-bridge.o

obj-y += ccw-device.o

include/hw/s390x/3270-ccw.h

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/*

 * Emulated ccw-attached 3270 definitions

 *

 * Copyright 2017 IBM Corp.

 * Author(s): Yang Chen <bjcyang@linux.vnet.ibm.com>

 *            Jing Liu <liujbjl@linux.vnet.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 HW_S390X_3270_CCW_H

#define HW_S390X_3270_CCW_H



#include "hw/sysbus.h"

#include "hw/s390x/css.h"

#include "hw/s390x/ccw-device.h"



#define EMULATED_CCW_3270_CU_TYPE 0x3270

#define EMULATED_CCW_3270_CHPID_TYPE 0x1a



#define TYPE_EMULATED_CCW_3270 "emulated-ccw-3270"

#define EMULATED_CCW_3270(obj) \

     OBJECT_CHECK(EmulatedCcw3270Device, (obj), TYPE_EMULATED_CCW_3270)

#define EMULATED_CCW_3270_CLASS(klass) \

     OBJECT_CLASS_CHECK(EmulatedCcw3270Class, (klass), TYPE_EMULATED_CCW_3270)

#define EMULATED_CCW_3270_GET_CLASS(obj) \

     OBJECT_GET_CLASS(EmulatedCcw3270Class, (obj), TYPE_EMULATED_CCW_3270)



typedef struct EmulatedCcw3270Device {

    CcwDevice parent_obj;

} EmulatedCcw3270Device;



typedef struct EmulatedCcw3270Class {

    CCWDeviceClass parent_class;



    void (*init)(EmulatedCcw3270Device *, Error **);

    int (*read_payload_3270)(EmulatedCcw3270Device *, uint32_t, uint16_t);

    int (*write_payload_3270)(EmulatedCcw3270Device *, uint8_t, uint32_t,

                              uint16_t);

} EmulatedCcw3270Class;



#endif