Hi Diana,
On 10/5/20 7:36 PM, Diana Craciun 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@xxxxxxxxxxx>
Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
Eric
> ---
> drivers/vfio/fsl-mc/vfio_fsl_mc.c | 18 +++++++++++++++++-
> 1 file changed, 17 insertions(+), 1 deletion(-)
>
> 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;
>
