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