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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-10-25 18:10:34 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 18:10:19 +0400 |
| commit | 585b954e1f2fa325d425b0786e4525ac7c9ae575 (patch) | |
| tree | e79174793782e81820c7f6896284f7e341bf9e9d /drivers/s390/cio/device_fsm.c | |
| parent | eb4f5d93d70458ea644e0f46737f0bcf87280e83 (diff) | |
| download | linux-585b954e1f2fa325d425b0786e4525ac7c9ae575.tar.xz | |
[S390] cio: notify drivers of channel path events
This patch adds a notification mechanism to inform ccw drivers
about changes to channel paths, which occured while the device
is online.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device_fsm.c')
| -rw-r--r-- | drivers/s390/cio/device_fsm.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index c9b852647f01..4395c01a9dac 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -349,9 +349,13 @@ out: static void ccw_device_oper_notify(struct ccw_device *cdev) { + struct subchannel *sch = to_subchannel(cdev->dev.parent); + if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) { /* Reenable channel measurements, if needed. */ ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF); + /* Save indication for new paths. */ + cdev->private->path_new_mask = sch->vpm; return; } /* Driver doesn't want device back. */ @@ -462,6 +466,32 @@ static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e) } } +static void ccw_device_report_path_events(struct ccw_device *cdev) +{ + struct subchannel *sch = to_subchannel(cdev->dev.parent); + int path_event[8]; + int chp, mask; + + for (chp = 0, mask = 0x80; chp < 8; chp++, mask >>= 1) { + path_event[chp] = PE_NONE; + if (mask & cdev->private->path_gone_mask & ~(sch->vpm)) + path_event[chp] |= PE_PATH_GONE; + if (mask & cdev->private->path_new_mask & sch->vpm) + path_event[chp] |= PE_PATH_AVAILABLE; + if (mask & cdev->private->pgid_reset_mask & sch->vpm) + path_event[chp] |= PE_PATHGROUP_ESTABLISHED; + } + if (cdev->online && cdev->drv->path_event) + cdev->drv->path_event(cdev, path_event); +} + +static void ccw_device_reset_path_events(struct ccw_device *cdev) +{ + cdev->private->path_gone_mask = 0; + cdev->private->path_new_mask = 0; + cdev->private->pgid_reset_mask = 0; +} + void ccw_device_verify_done(struct ccw_device *cdev, int err) { @@ -498,6 +528,7 @@ callback: &cdev->private->irb); memset(&cdev->private->irb, 0, sizeof(struct irb)); } + ccw_device_report_path_events(cdev); break; case -ETIME: case -EUSERS: @@ -516,6 +547,7 @@ callback: ccw_device_done(cdev, DEV_STATE_NOT_OPER); break; } + ccw_device_reset_path_events(cdev); } /* |