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SubjectRe: [PATCH v5 10/10] vfio/fsl-mc: Add support for device reset
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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