Searched hist:"204 b394a23ad5e30944f23518e21e844614da2ff" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/drivers/s390/cio/ |
| H A D | vfio_ccw_fsm.c | diff 204b394a23ad5e30944f23518e21e844614da2ff Thu Jul 07 08:57:37 CDT 2022 Eric Farman <farman@linux.ibm.com> vfio/ccw: Move FSM open/close to MDEV open/close
Part of the confusion that has existed is the FSM lifecycle of
subchannels between the common CSS driver and the vfio-ccw driver.
During configuration, the FSM state goes from NOT_OPER to STANDBY
to IDLE, but then back to NOT_OPER. For example:
vfio_ccw_sch_probe: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_probe: VFIO_CCW_STATE_STANDBY
vfio_ccw_mdev_probe: VFIO_CCW_STATE_IDLE
vfio_ccw_mdev_remove: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_remove: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_shutdown: VFIO_CCW_STATE_NOT_OPER
Rearrange the open/close events to align with the mdev open/close,
to better manage the memory and state of the devices as time
progresses. Specifically, make mdev_open() perform the FSM open,
and mdev_close() perform the FSM close instead of reset (which is
both close and open).
This makes the NOT_OPER state a dead-end path, indicating the
device is probably not recoverable without fully probing and
re-configuring the device.
This has the nice side-effect of removing a number of special-cases
where the FSM state is managed outside of the FSM itself (such as
the aforementioned mdev_close() routine).
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220707135737.720765-12-farman@linux.ibm.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
|
| H A D | vfio_ccw_ops.c | diff 204b394a23ad5e30944f23518e21e844614da2ff Thu Jul 07 08:57:37 CDT 2022 Eric Farman <farman@linux.ibm.com> vfio/ccw: Move FSM open/close to MDEV open/close
Part of the confusion that has existed is the FSM lifecycle of
subchannels between the common CSS driver and the vfio-ccw driver.
During configuration, the FSM state goes from NOT_OPER to STANDBY
to IDLE, but then back to NOT_OPER. For example:
vfio_ccw_sch_probe: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_probe: VFIO_CCW_STATE_STANDBY
vfio_ccw_mdev_probe: VFIO_CCW_STATE_IDLE
vfio_ccw_mdev_remove: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_remove: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_shutdown: VFIO_CCW_STATE_NOT_OPER
Rearrange the open/close events to align with the mdev open/close,
to better manage the memory and state of the devices as time
progresses. Specifically, make mdev_open() perform the FSM open,
and mdev_close() perform the FSM close instead of reset (which is
both close and open).
This makes the NOT_OPER state a dead-end path, indicating the
device is probably not recoverable without fully probing and
re-configuring the device.
This has the nice side-effect of removing a number of special-cases
where the FSM state is managed outside of the FSM itself (such as
the aforementioned mdev_close() routine).
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220707135737.720765-12-farman@linux.ibm.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
|
| H A D | vfio_ccw_drv.c | diff 204b394a23ad5e30944f23518e21e844614da2ff Thu Jul 07 08:57:37 CDT 2022 Eric Farman <farman@linux.ibm.com> vfio/ccw: Move FSM open/close to MDEV open/close
Part of the confusion that has existed is the FSM lifecycle of
subchannels between the common CSS driver and the vfio-ccw driver.
During configuration, the FSM state goes from NOT_OPER to STANDBY
to IDLE, but then back to NOT_OPER. For example:
vfio_ccw_sch_probe: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_probe: VFIO_CCW_STATE_STANDBY
vfio_ccw_mdev_probe: VFIO_CCW_STATE_IDLE
vfio_ccw_mdev_remove: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_remove: VFIO_CCW_STATE_NOT_OPER
vfio_ccw_sch_shutdown: VFIO_CCW_STATE_NOT_OPER
Rearrange the open/close events to align with the mdev open/close,
to better manage the memory and state of the devices as time
progresses. Specifically, make mdev_open() perform the FSM open,
and mdev_close() perform the FSM close instead of reset (which is
both close and open).
This makes the NOT_OPER state a dead-end path, indicating the
device is probably not recoverable without fully probing and
re-configuring the device.
This has the nice side-effect of removing a number of special-cases
where the FSM state is managed outside of the FSM itself (such as
the aforementioned mdev_close() routine).
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220707135737.720765-12-farman@linux.ibm.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
|