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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#include "sysemu/sysemu.h"
23
24IOInstEnding s390_ccw_cmd_request(SubchDev *sch)
25{
26 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data);
27
28 if (!cdc->handle_request) {
29 return IOINST_CC_STATUS_PRESENT;
30 }
31 return cdc->handle_request(sch);
32}
33
34int s390_ccw_halt(SubchDev *sch)
35{
36 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data);
37
38 if (!cdc->handle_halt) {
39 return -ENOSYS;
40 }
41 return cdc->handle_halt(sch);
42}
43
44int s390_ccw_clear(SubchDev *sch)
45{
46 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data);
47
48 if (!cdc->handle_clear) {
49 return -ENOSYS;
50 }
51 return cdc->handle_clear(sch);
52}
53
54static void s390_ccw_get_dev_info(S390CCWDevice *cdev,
55 char *sysfsdev,
56 Error **errp)
57{
58 unsigned int cssid, ssid, devid;
59 char dev_path[PATH_MAX] = {0}, *tmp;
60
61 if (!sysfsdev) {
62 error_setg(errp, "No host device provided");
63 error_append_hint(errp,
64 "Use -device vfio-ccw,sysfsdev=PATH_TO_DEVICE\n");
65 return;
66 }
67
68 if (!realpath(sysfsdev, dev_path)) {
69 error_setg_errno(errp, errno, "Host device '%s' not found", sysfsdev);
70 return;
71 }
72
73 cdev->mdevid = g_path_get_basename(dev_path);
74
75 tmp = basename(dirname(dev_path));
76 if (sscanf(tmp, "%2x.%1x.%4x", &cssid, &ssid, &devid) != 3) {
77 error_setg_errno(errp, errno, "Failed to read %s", tmp);
78 return;
79 }
80
81 cdev->hostid.cssid = cssid;
82 cdev->hostid.ssid = ssid;
83 cdev->hostid.devid = devid;
84 cdev->hostid.valid = true;
85}
86
87static void s390_ccw_realize(S390CCWDevice *cdev, char *sysfsdev, Error **errp)
88{
89 CcwDevice *ccw_dev = CCW_DEVICE(cdev);
90 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
91 DeviceState *parent = DEVICE(ccw_dev);
92 SubchDev *sch;
93 int ret;
94 Error *err = NULL;
95
96 s390_ccw_get_dev_info(cdev, sysfsdev, &err);
97 if (err) {
98 goto out_err_propagate;
99 }
100
101 sch = css_create_sch(ccw_dev->devno, &err);
102 if (!sch) {
103 goto out_mdevid_free;
104 }
105 sch->driver_data = cdev;
106 sch->do_subchannel_work = do_subchannel_work_passthrough;
107
108 ccw_dev->sch = sch;
109 ret = css_sch_build_schib(sch, &cdev->hostid);
110 if (ret) {
111 error_setg_errno(&err, -ret, "%s: Failed to build initial schib",
112 __func__);
113 goto out_err;
114 }
115
116 ck->realize(ccw_dev, &err);
117 if (err) {
118 goto out_err;
119 }
120
121 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
122 parent->hotplugged, 1);
123 return;
124
125out_err:
126 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
127 ccw_dev->sch = NULL;
128 g_free(sch);
129out_mdevid_free:
130 g_free(cdev->mdevid);
131out_err_propagate:
132 error_propagate(errp, err);
133}
134
135static void s390_ccw_unrealize(S390CCWDevice *cdev, Error **errp)
136{
137 CcwDevice *ccw_dev = CCW_DEVICE(cdev);
138 SubchDev *sch = ccw_dev->sch;
139
140 if (sch) {
141 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
142 g_free(sch);
143 ccw_dev->sch = NULL;
144 }
145
146 g_free(cdev->mdevid);
147}
148
149static void s390_ccw_instance_init(Object *obj)
150{
151 S390CCWDevice *dev = S390_CCW_DEVICE(obj);
152
153 device_add_bootindex_property(obj, &dev->bootindex, "bootindex",
154 "/disk@0,0", DEVICE(obj), NULL);
155}
156
157static void s390_ccw_class_init(ObjectClass *klass, void *data)
158{
159 DeviceClass *dc = DEVICE_CLASS(klass);
160 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_CLASS(klass);
161
162 dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
163 cdc->realize = s390_ccw_realize;
164 cdc->unrealize = s390_ccw_unrealize;
165}
166
167static const TypeInfo s390_ccw_info = {
168 .name = TYPE_S390_CCW,
169 .parent = TYPE_CCW_DEVICE,
170 .instance_init = s390_ccw_instance_init,
171 .instance_size = sizeof(S390CCWDevice),
172 .class_size = sizeof(S390CCWDeviceClass),
173 .class_init = s390_ccw_class_init,
174 .abstract = true,
175};
176
177static void register_s390_ccw_type(void)
178{
179 type_register_static(&s390_ccw_info);
180}
181
182type_init(register_s390_ccw_type)
183
