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14#include "qemu/osdep.h"
15#include <libgen.h>
16#include "qapi/error.h"
17#include "qemu/module.h"
18#include "hw/sysbus.h"
19#include "hw/s390x/css.h"
20#include "hw/s390x/css-bridge.h"
21#include "hw/s390x/s390-ccw.h"
22
23IOInstEnding s390_ccw_cmd_request(SubchDev *sch)
24{
25 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data);
26
27 if (!cdc->handle_request) {
28 return IOINST_CC_STATUS_PRESENT;
29 }
30 return cdc->handle_request(sch);
31}
32
33int s390_ccw_halt(SubchDev *sch)
34{
35 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data);
36
37 if (!cdc->handle_halt) {
38 return -ENOSYS;
39 }
40 return cdc->handle_halt(sch);
41}
42
43int s390_ccw_clear(SubchDev *sch)
44{
45 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data);
46
47 if (!cdc->handle_clear) {
48 return -ENOSYS;
49 }
50 return cdc->handle_clear(sch);
51}
52
53static void s390_ccw_get_dev_info(S390CCWDevice *cdev,
54 char *sysfsdev,
55 Error **errp)
56{
57 unsigned int cssid, ssid, devid;
58 char dev_path[PATH_MAX] = {0}, *tmp;
59
60 if (!sysfsdev) {
61 error_setg(errp, "No host device provided");
62 error_append_hint(errp,
63 "Use -device vfio-ccw,sysfsdev=PATH_TO_DEVICE\n");
64 return;
65 }
66
67 if (!realpath(sysfsdev, dev_path)) {
68 error_setg_errno(errp, errno, "Host device '%s' not found", sysfsdev);
69 return;
70 }
71
72 cdev->mdevid = g_path_get_basename(dev_path);
73
74 tmp = basename(dirname(dev_path));
75 if (sscanf(tmp, "%2x.%1x.%4x", &cssid, &ssid, &devid) != 3) {
76 error_setg_errno(errp, errno, "Failed to read %s", tmp);
77 return;
78 }
79
80 cdev->hostid.cssid = cssid;
81 cdev->hostid.ssid = ssid;
82 cdev->hostid.devid = devid;
83 cdev->hostid.valid = true;
84}
85
86static void s390_ccw_realize(S390CCWDevice *cdev, char *sysfsdev, Error **errp)
87{
88 CcwDevice *ccw_dev = CCW_DEVICE(cdev);
89 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
90 DeviceState *parent = DEVICE(ccw_dev);
91 SubchDev *sch;
92 int ret;
93 Error *err = NULL;
94
95 s390_ccw_get_dev_info(cdev, sysfsdev, &err);
96 if (err) {
97 goto out_err_propagate;
98 }
99
100 sch = css_create_sch(ccw_dev->devno, &err);
101 if (!sch) {
102 goto out_mdevid_free;
103 }
104 sch->driver_data = cdev;
105 sch->do_subchannel_work = do_subchannel_work_passthrough;
106
107 ccw_dev->sch = sch;
108 ret = css_sch_build_schib(sch, &cdev->hostid);
109 if (ret) {
110 error_setg_errno(&err, -ret, "%s: Failed to build initial schib",
111 __func__);
112 goto out_err;
113 }
114
115 ck->realize(ccw_dev, &err);
116 if (err) {
117 goto out_err;
118 }
119
120 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
121 parent->hotplugged, 1);
122 return;
123
124out_err:
125 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
126 ccw_dev->sch = NULL;
127 g_free(sch);
128out_mdevid_free:
129 g_free(cdev->mdevid);
130out_err_propagate:
131 error_propagate(errp, err);
132}
133
134static void s390_ccw_unrealize(S390CCWDevice *cdev, Error **errp)
135{
136 CcwDevice *ccw_dev = CCW_DEVICE(cdev);
137 SubchDev *sch = ccw_dev->sch;
138
139 if (sch) {
140 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
141 g_free(sch);
142 ccw_dev->sch = NULL;
143 }
144
145 g_free(cdev->mdevid);
146}
147
148static void s390_ccw_instance_init(Object *obj)
149{
150 S390CCWDevice *dev = S390_CCW_DEVICE(obj);
151
152 device_add_bootindex_property(obj, &dev->bootindex, "bootindex",
153 "/disk@0,0", DEVICE(obj), NULL);
154}
155
156static void s390_ccw_class_init(ObjectClass *klass, void *data)
157{
158 DeviceClass *dc = DEVICE_CLASS(klass);
159 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_CLASS(klass);
160
161 dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
162 cdc->realize = s390_ccw_realize;
163 cdc->unrealize = s390_ccw_unrealize;
164}
165
166static const TypeInfo s390_ccw_info = {
167 .name = TYPE_S390_CCW,
168 .parent = TYPE_CCW_DEVICE,
169 .instance_init = s390_ccw_instance_init,
170 .instance_size = sizeof(S390CCWDevice),
171 .class_size = sizeof(S390CCWDeviceClass),
172 .class_init = s390_ccw_class_init,
173 .abstract = true,
174};
175
176static void register_s390_ccw_type(void)
177{
178 type_register_static(&s390_ccw_info);
179}
180
181type_init(register_s390_ccw_type)
182
