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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2023, HiSilicon Ltd.
*/
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/vfio.h>
#include "vfio.h"
static struct dentry *vfio_debugfs_root;
static int vfio_device_state_read(struct seq_file *seq, void *data)
{
struct device *vf_dev = seq->private;
struct vfio_device *vdev = container_of(vf_dev,
struct vfio_device, device);
enum vfio_device_mig_state state;
int ret;
BUILD_BUG_ON(VFIO_DEVICE_STATE_NR !=
VFIO_DEVICE_STATE_PRE_COPY_P2P + 1);
ret = vdev->mig_ops->migration_get_state(vdev, &state);
if (ret)
return -EINVAL;
switch (state) {
case VFIO_DEVICE_STATE_ERROR:
seq_puts(seq, "ERROR\n");
break;
case VFIO_DEVICE_STATE_STOP:
seq_puts(seq, "STOP\n");
break;
case VFIO_DEVICE_STATE_RUNNING:
seq_puts(seq, "RUNNING\n");
break;
case VFIO_DEVICE_STATE_STOP_COPY:
seq_puts(seq, "STOP_COPY\n");
break;
case VFIO_DEVICE_STATE_RESUMING:
seq_puts(seq, "RESUMING\n");
break;
case VFIO_DEVICE_STATE_RUNNING_P2P:
seq_puts(seq, "RUNNING_P2P\n");
break;
case VFIO_DEVICE_STATE_PRE_COPY:
seq_puts(seq, "PRE_COPY\n");
break;
case VFIO_DEVICE_STATE_PRE_COPY_P2P:
seq_puts(seq, "PRE_COPY_P2P\n");
break;
default:
seq_puts(seq, "Invalid\n");
}
return 0;
}
void vfio_device_debugfs_init(struct vfio_device *vdev)
{
struct device *dev = &vdev->device;
vdev->debug_root = debugfs_create_dir(dev_name(vdev->dev),
vfio_debugfs_root);
if (vdev->mig_ops) {
struct dentry *vfio_dev_migration = NULL;
vfio_dev_migration = debugfs_create_dir("migration",
vdev->debug_root);
debugfs_create_devm_seqfile(dev, "state", vfio_dev_migration,
vfio_device_state_read);
}
}
void vfio_device_debugfs_exit(struct vfio_device *vdev)
{
debugfs_remove_recursive(vdev->debug_root);
}
void vfio_debugfs_create_root(void)
{
vfio_debugfs_root = debugfs_create_dir("vfio", NULL);
}
void vfio_debugfs_remove_root(void)
{
debugfs_remove_recursive(vfio_debugfs_root);
vfio_debugfs_root = NULL;
}
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