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