vfio/fsl-mc: Add support for device reset (ac93ab2b) · Commits · 戴 / test

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>

drivers/vfio/fsl-mc/vfio_fsl_mc.c

+17 −1

Original line number	Diff line number	Diff line
		@@ -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:
		{
		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;

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