| Message ID | 20170406111646.12624-6-cornelia.huck@de.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 06.04.2017 13:16, Cornelia Huck wrote: > From: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> > > Expose the busids of the virtual I/O subchannel and the virtual CCW > device to ease debugging. This is needed because: > 1. subchannel id are assigned dynamically, and cannot be set from > outside. > 2. device busid could possibly be auto generated. > > An example of using HMP to retrieve the property values of a > virtio-balloon-ccw device looks like: > > [root@localhost ~]# lscss -d 0.0.0004 > Device Subchan. DevType CU Type Use PIM PAM POM CHPIDs > ---------------------------------------------------------------------- > 0.0.0004 0.0.0003 0000/00 3832/05 yes 80 80 ff 00000000 00000000 > > (qemu) info qtree > ... ... > dev: virtio-balloon-ccw, id "balloon0" > devno = "<unset>" > ioeventfd = true > max_revision = 2 (0x2) > dev_id = "fe.0.0004" > subch_id = "fe.0.0003" > ... ... > > After migration, if we have the same device that shows up on a > different subchannel, we must re-fill the subch_id of the ccw > device with the new schid, or the subch_id will have an old wrong > schid value. So this also re-fills the subch_id after migration. > > While we are at it, also neaten the related error handling a bit. > > Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> > Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> > --- > hw/s390x/ccw-device.c | 39 +++++++++++++++++++++++++++++++++++++++ > hw/s390x/ccw-device.h | 7 +++++++ > hw/s390x/virtio-ccw.c | 28 ++++++++++++++++++++++------ > 3 files changed, 68 insertions(+), 6 deletions(-) [...] > static inline CcwDevice *to_ccw_dev_fast(DeviceState *d) > diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c > index 00b3bde4e9..4e59e34d74 100644 > --- a/hw/s390x/virtio-ccw.c > +++ b/hw/s390x/virtio-ccw.c > @@ -680,6 +680,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) > { > VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); > CcwDevice *ccw_dev = CCW_DEVICE(dev); > + CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); > SubchDev *sch = css_create_virtual_sch(ccw_dev->bus_id, errp); > Error *err = NULL; > > @@ -689,8 +690,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) > if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) { > error_setg(&err, "Invalid value of property max_rev " > "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); > - error_propagate(errp, err); > - return; > + goto out_err; > } > > sch->driver_data = dev; > @@ -713,13 +713,24 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) > > if (k->realize) { > k->realize(dev, &err); > + if (err) { > + goto out_err; > + } > } > + > + ck->realize(ccw_dev, &err); > if (err) { > - error_propagate(errp, err); > - css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); > - ccw_dev->sch = NULL; > - g_free(sch); > + goto out_err; > } > + > + return; > + > +out_err: > + error_propagate(errp, err); > + css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); > + ccw_dev->sch = NULL; > + g_free(sch); > + return; > } Cosmetic nit: Remove the unnecessary "return;" statement right before the closing curly bracket. Thomas
On Thu, 6 Apr 2017 14:19:10 +0200 Thomas Huth <thuth@redhat.com> wrote: > On 06.04.2017 13:16, Cornelia Huck wrote: > > +out_err: > > + error_propagate(errp, err); > > + css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); > > + ccw_dev->sch = NULL; > > + g_free(sch); > > + return; > > } > > Cosmetic nit: Remove the unnecessary "return;" statement right before > the closing curly bracket. Yup, will merge in.
diff --git a/hw/s390x/ccw-device.c b/hw/s390x/ccw-device.c index 28ea20440e..8fe3cf49ef 100644 --- a/hw/s390x/ccw-device.c +++ b/hw/s390x/ccw-device.c @@ -11,11 +11,50 @@ #include "qemu/osdep.h" #include "ccw-device.h" +static void ccw_device_refill_ids(CcwDevice *dev) +{ + SubchDev *sch = dev->sch; + + assert(sch); + + dev->dev_id.cssid = sch->cssid; + dev->dev_id.ssid = sch->ssid; + dev->dev_id.devid = sch->devno; + dev->dev_id.valid = true; + + dev->subch_id.cssid = sch->cssid; + dev->subch_id.ssid = sch->ssid; + dev->subch_id.devid = sch->schid; + dev->subch_id.valid = true; +} + +static void ccw_device_realize(CcwDevice *dev, Error **errp) +{ + ccw_device_refill_ids(dev); +} + +static Property ccw_device_properties[] = { + DEFINE_PROP_CSS_DEV_ID_RO("dev_id", CcwDevice, dev_id), + DEFINE_PROP_CSS_DEV_ID_RO("subch_id", CcwDevice, subch_id), + DEFINE_PROP_END_OF_LIST(), +}; + +static void ccw_device_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + CCWDeviceClass *k = CCW_DEVICE_CLASS(klass); + + k->realize = ccw_device_realize; + k->refill_ids = ccw_device_refill_ids; + dc->props = ccw_device_properties; +} + static const TypeInfo ccw_device_info = { .name = TYPE_CCW_DEVICE, .parent = TYPE_DEVICE, .instance_size = sizeof(CcwDevice), .class_size = sizeof(CCWDeviceClass), + .class_init = ccw_device_class_init, .abstract = true, }; diff --git a/hw/s390x/ccw-device.h b/hw/s390x/ccw-device.h index 59ba01b6c5..48700fe23a 100644 --- a/hw/s390x/ccw-device.h +++ b/hw/s390x/ccw-device.h @@ -19,12 +19,19 @@ typedef struct CcwDevice { DeviceState parent_obj; SubchDev *sch; /* <cssid>.<ssid>.<device number> */ + /* The user-set busid of the virtual ccw device. */ CssDevId bus_id; + /* The actual busid of the virtual ccw device. */ + CssDevId dev_id; + /* The actual busid of the virtual subchannel. */ + CssDevId subch_id; } CcwDevice; typedef struct CCWDeviceClass { DeviceClass parent_class; void (*unplug)(HotplugHandler *, DeviceState *, Error **); + void (*realize)(CcwDevice *, Error **); + void (*refill_ids)(CcwDevice *); } CCWDeviceClass; static inline CcwDevice *to_ccw_dev_fast(DeviceState *d) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 00b3bde4e9..4e59e34d74 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -680,6 +680,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) { VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); CcwDevice *ccw_dev = CCW_DEVICE(dev); + CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); SubchDev *sch = css_create_virtual_sch(ccw_dev->bus_id, errp); Error *err = NULL; @@ -689,8 +690,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) { error_setg(&err, "Invalid value of property max_rev " "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); - error_propagate(errp, err); - return; + goto out_err; } sch->driver_data = dev; @@ -713,13 +713,24 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) if (k->realize) { k->realize(dev, &err); + if (err) { + goto out_err; + } } + + ck->realize(ccw_dev, &err); if (err) { - error_propagate(errp, err); - css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); - ccw_dev->sch = NULL; - g_free(sch); + goto out_err; } + + return; + +out_err: + error_propagate(errp, err); + css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); + ccw_dev->sch = NULL; + g_free(sch); + return; } static int virtio_ccw_exit(VirtioCcwDevice *dev) @@ -1261,12 +1272,17 @@ static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) { VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); CcwDevice *ccw_dev = CCW_DEVICE(d); + CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); SubchDev *s = ccw_dev->sch; VirtIODevice *vdev = virtio_ccw_get_vdev(s); int len; s->driver_data = dev; subch_device_load(s, f); + /* Re-fill subch_id after loading the subchannel states.*/ + if (ck->refill_ids) { + ck->refill_ids(ccw_dev); + } len = qemu_get_be32(f); if (len != 0) { dev->indicators = get_indicator(qemu_get_be64(f), len);