hw/s390x/3270-ccw.c

   1 /*
   2  * Emulated ccw-attached 3270 implementation
   3  *
   4  * Copyright 2017 IBM Corp.
   5  * Author(s): Yang Chen <bjcyang@linux.vnet.ibm.com>
   6  *            Jing Liu <liujbjl@linux.vnet.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12 #include "qemu/osdep.h"
  13 #include "qapi/error.h"
  14 #include "qemu/module.h"
  15 #include "cpu.h"
  16 #include "hw/s390x/css.h"
  17 #include "hw/s390x/css-bridge.h"
  18 #include "hw/s390x/3270-ccw.h"
  19
  20 static void emulated_ccw_3270_realize(DeviceState *ds, Error **errp)
  21 {
  22     uint16_t chpid;
  23     EmulatedCcw3270Device *dev = EMULATED_CCW_3270(ds);
  24     EmulatedCcw3270Class *ck = EMULATED_CCW_3270_GET_CLASS(dev);
  25     CcwDevice *cdev = CCW_DEVICE(ds);
  26     CCWDeviceClass *cdk = CCW_DEVICE_GET_CLASS(cdev);
  27     SubchDev *sch = css_create_virtual_sch(cdev->devno, errp);
  28     Error *err = NULL;
  29
  30     if (!sch) {
  31         return;
  32     }
  33
  34     if (!ck->init) {
  35         goto out_err;
  36     }
  37
  38     sch->driver_data = dev;
  39     cdev->sch = sch;
  40     chpid = css_find_free_chpid(sch->cssid);
  41
  42     if (chpid > MAX_CHPID) {
  43         error_setg(&err, "No available chpid to use.");
  44         goto out_err;
  45     }
  46
  47     sch->id.reserved = 0xff;
  48     sch->id.cu_type = EMULATED_CCW_3270_CU_TYPE;
  49     css_sch_build_virtual_schib(sch, (uint8_t)chpid,
  50                                 EMULATED_CCW_3270_CHPID_TYPE);
  51
  52     ck->init(dev, &err);
  53     if (err) {
  54         goto out_err;
  55     }
  56
  57     cdk->realize(cdev, &err);
  58     if (err) {
  59         goto out_err;
  60     }
  61
  62     return;
  63
  64 out_err:
  65     error_propagate(errp, err);
  66     css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
  67     cdev->sch = NULL;
  68     g_free(sch);
  69 }
  70
  71 static Property emulated_ccw_3270_properties[] = {
  72     DEFINE_PROP_END_OF_LIST(),
  73 };
  74
  75 static void emulated_ccw_3270_class_init(ObjectClass *klass, void *data)
  76 {
  77     DeviceClass *dc = DEVICE_CLASS(klass);
  78
  79     dc->props = emulated_ccw_3270_properties;
  80     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
  81     dc->realize = emulated_ccw_3270_realize;
  82     dc->hotpluggable = false;
  83 }
  84
  85 static const TypeInfo emulated_ccw_3270_info = {
  86     .name = TYPE_EMULATED_CCW_3270,
  87     .parent = TYPE_CCW_DEVICE,
  88     .instance_size = sizeof(EmulatedCcw3270Device),
  89     .class_init = emulated_ccw_3270_class_init,
  90     .class_size = sizeof(EmulatedCcw3270Class),
  91     .abstract = true,
  92 };
  93
  94 static void emulated_ccw_register(void)
  95 {
  96     type_register_static(&emulated_ccw_3270_info);
  97 }
  98
  99 type_init(emulated_ccw_register)