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authorDiana Craciun <diana.craciun@oss.nxp.com>2020-10-05 20:36:54 +0300
committerAlex Williamson <alex.williamson@redhat.com>2020-10-12 20:33:48 +0300
commitac93ab2bf69a5b7724106ec7ce852eff9c307510 (patch)
tree7be4cfe50a7131ed2072a3f509f0fdacb6f45101 /drivers/vfio
parent1bb141ed5e14f773f9e08b80fe5db3fd405399db (diff)
downloadlinux-ac93ab2bf69a5b7724106ec7ce852eff9c307510.tar.xz
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.c18
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;