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| author | Diana Craciun <diana.craciun@oss.nxp.com> | 2020-10-05 20:36:52 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2020-10-12 11:33:15 -0600 |
| commit | cc0ee20bd96971c10eba9a83ecf1c0733078a083 (patch) | |
| tree | 6e0208f57f62939b4ee086574a520fc1b227f6db /drivers/vfio/fsl-mc/vfio_fsl_mc_private.h | |
| parent | 2e0d29561f593a5ab6d37ea032513d2714a007df (diff) | |
| download | linux-stable-cc0ee20bd96971c10eba9a83ecf1c0733078a083.tar.gz linux-stable-cc0ee20bd96971c10eba9a83ecf1c0733078a083.tar.bz2 linux-stable-cc0ee20bd96971c10eba9a83ecf1c0733078a083.zip | |
vfio/fsl-mc: trigger an interrupt via eventfd
This patch allows to set an eventfd for fsl-mc device interrupts
and also to trigger the interrupt eventfd from userspace for testing.
All fsl-mc device interrupts are MSIs. The MSIs are allocated from
the MSI domain only once per DPRC and used by all the DPAA2 objects.
The interrupts are managed by the DPRC in a pool of interrupts. Each
device requests interrupts from this pool. The pool is allocated
when the first virtual device is setting the interrupts.
The pool of interrupts is protected by a lock.
The DPRC has an interrupt of its own which indicates if the DPRC
contents have changed. However, currently, the contents of a DPRC
assigned to the guest cannot be changed at runtime, so this interrupt
is not configured.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/fsl-mc/vfio_fsl_mc_private.h')
| -rw-r--r-- | drivers/vfio/fsl-mc/vfio_fsl_mc_private.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h b/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h index 2c3f625a3240..7aa49b9ba60d 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h @@ -15,6 +15,13 @@ #define VFIO_FSL_MC_INDEX_TO_OFFSET(index) \ ((u64)(index) << VFIO_FSL_MC_OFFSET_SHIFT) +struct vfio_fsl_mc_irq { + u32 flags; + u32 count; + struct eventfd_ctx *trigger; + char *name; +}; + struct vfio_fsl_mc_reflck { struct kref kref; struct mutex lock; @@ -34,6 +41,7 @@ struct vfio_fsl_mc_device { struct vfio_fsl_mc_region *regions; struct vfio_fsl_mc_reflck *reflck; struct mutex igate; + struct vfio_fsl_mc_irq *mc_irqs; }; extern int vfio_fsl_mc_set_irqs_ioctl(struct vfio_fsl_mc_device *vdev, @@ -41,4 +49,6 @@ extern int vfio_fsl_mc_set_irqs_ioctl(struct vfio_fsl_mc_device *vdev, unsigned int start, unsigned int count, void *data); +void vfio_fsl_mc_irqs_cleanup(struct vfio_fsl_mc_device *vdev); + #endif /* VFIO_FSL_MC_PRIVATE_H */ |