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| author |   Jason Gunthorpe <jgg@nvidia.com> | 2021-10-26 14:57:33 -0300 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2021-10-28 11:06:31 -0600 |
| commit | 3bf1311f351ef289f2aee79b86bcece2039fa611 (patch) | |
| tree | 6f701bc254cc677df38356bda766affd17c44774 /drivers/s390/cio/vfio_ccw_private.h | |
| parent | vfio/ccw: Pass vfio_ccw_private not mdev_device to various functions (diff) | |
| download | linux-dev-3bf1311f351ef289f2aee79b86bcece2039fa611.tar.xz linux-dev-3bf1311f351ef289f2aee79b86bcece2039fa611.zip | |
vfio/ccw: Convert to use vfio_register_emulated_iommu_dev()
This is a more complicated conversion because vfio_ccw is sharing the
vfio_device between both the mdev_device, its vfio_device and the
css_driver.
The mdev is a singleton, and the reason for this sharing is so the extra
css_driver function callbacks to be delivered to the vfio_device
implementation.
This keeps things as they are, with the css_driver allocating the
singleton, not the mdev_driver.
Embed the vfio_device in the vfio_ccw_private and instantiate it as a
vfio_device when the mdev probes. The drvdata of both the css_device and
the mdev_device point at the private, and container_of is used to get it
back from the vfio_device.
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/4-v4-cea4f5bd2c00+b52-ccw_mdev_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_private.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h index b2c762eb42b9..7272eb788612 100644 --- a/drivers/s390/cio/vfio_ccw_private.h +++ b/drivers/s390/cio/vfio_ccw_private.h @@ -17,6 +17,7 @@ #include <linux/eventfd.h> #include <linux/workqueue.h> #include <linux/vfio_ccw.h> +#include <linux/vfio.h> #include <asm/crw.h> #include <asm/debug.h> @@ -67,6 +68,7 @@ struct vfio_ccw_crw { /** * struct vfio_ccw_private + * @vdev: Embedded VFIO device * @sch: pointer to the subchannel * @state: internal state of the device * @completion: synchronization helper of the I/O completion @@ -90,6 +92,7 @@ struct vfio_ccw_crw { * @crw_work: work for deferral process of CRW handling */ struct vfio_ccw_private { + struct vfio_device vdev; struct subchannel *sch; int state; struct completion *completion; @@ -121,6 +124,8 @@ extern void vfio_ccw_mdev_unreg(struct subchannel *sch); extern int vfio_ccw_sch_quiesce(struct subchannel *sch); +extern struct mdev_driver vfio_ccw_mdev_driver; + /* * States of the device statemachine. */ |