Messages in this thread | | | Date | Fri, 2 Oct 2020 14:50:27 -0600 | From | Alex Williamson <> | Subject | Re: [PATCH v5 10/10] vfio/fsl-mc: Add support for device reset |
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On Tue, 29 Sep 2020 12:03:39 +0300 Diana Craciun <diana.craciun@oss.nxp.com> wrote:
> 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> > --- > drivers/vfio/fsl-mc/vfio_fsl_mc.c | 14 +++++++++++++- > 1 file changed, 13 insertions(+), 1 deletion(-) > > diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c > index 0aff99cdf722..e1b2dea8a5fe 100644 > --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c > +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c > @@ -299,7 +299,19 @@ 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;
This should also result in setting the VFIO_DEVICE_FLAGS_RESET bit in vfio_device_info.flags for the appropriate devices. Thanks,
Alex
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