diff options
| author |   Diana Craciun <diana.craciun@oss.nxp.com> | 2020-10-05 20:36:54 +0300 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2020-10-12 11:33:48 -0600 |
| commit | ac93ab2bf69a5b7724106ec7ce852eff9c307510 (patch) | |
| tree | 7be4cfe50a7131ed2072a3f509f0fdacb6f45101 /drivers/vfio | |
| parent | vfio/fsl-mc: Add read/write support for fsl-mc devices (diff) | |
| download | linux-dev-ac93ab2bf69a5b7724106ec7ce852eff9c307510.tar.xz linux-dev-ac93ab2bf69a5b7724106ec7ce852eff9c307510.zip | |
vfio/fsl-mc: Add support for device reset
Currently only resetting the DPRC container is supported which
will reset all the objects inside it. Resetting individual
objects is possible from the userspace by issueing commands
towards MC firmware.
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')
| -rw-r--r-- | drivers/vfio/fsl-mc/vfio_fsl_mc.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index d95568cd8021..d009f873578c 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -217,6 +217,10 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, return -EINVAL; info.flags = VFIO_DEVICE_FLAGS_FSL_MC; + + if (is_fsl_mc_bus_dprc(mc_dev)) + info.flags |= VFIO_DEVICE_FLAGS_RESET; + info.num_regions = mc_dev->obj_desc.region_count; info.num_irqs = mc_dev->obj_desc.irq_count; @@ -299,7 +303,19 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, } case VFIO_DEVICE_RESET: { - return -ENOTTY; + int ret; + struct fsl_mc_device *mc_dev = vdev->mc_dev; + + /* reset is supported only for the DPRC */ + if (!is_fsl_mc_bus_dprc(mc_dev)) + return -ENOTTY; + + ret = dprc_reset_container(mc_dev->mc_io, 0, + mc_dev->mc_handle, + mc_dev->obj_desc.id, + DPRC_RESET_OPTION_NON_RECURSIVE); + return ret; + } default: return -ENOTTY; |