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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2023, HiSilicon Ltd.4 */5 6#include <linux/device.h>7#include <linux/debugfs.h>8#include <linux/seq_file.h>9#include <linux/vfio.h>10#include "vfio.h"11 12static struct dentry *vfio_debugfs_root;13 14static int vfio_device_state_read(struct seq_file *seq, void *data)15{16 struct device *vf_dev = seq->private;17 struct vfio_device *vdev = container_of(vf_dev,18 struct vfio_device, device);19 enum vfio_device_mig_state state;20 int ret;21 22 BUILD_BUG_ON(VFIO_DEVICE_STATE_NR !=23 VFIO_DEVICE_STATE_PRE_COPY_P2P + 1);24 25 ret = vdev->mig_ops->migration_get_state(vdev, &state);26 if (ret)27 return -EINVAL;28 29 switch (state) {30 case VFIO_DEVICE_STATE_ERROR:31 seq_puts(seq, "ERROR\n");32 break;33 case VFIO_DEVICE_STATE_STOP:34 seq_puts(seq, "STOP\n");35 break;36 case VFIO_DEVICE_STATE_RUNNING:37 seq_puts(seq, "RUNNING\n");38 break;39 case VFIO_DEVICE_STATE_STOP_COPY:40 seq_puts(seq, "STOP_COPY\n");41 break;42 case VFIO_DEVICE_STATE_RESUMING:43 seq_puts(seq, "RESUMING\n");44 break;45 case VFIO_DEVICE_STATE_RUNNING_P2P:46 seq_puts(seq, "RUNNING_P2P\n");47 break;48 case VFIO_DEVICE_STATE_PRE_COPY:49 seq_puts(seq, "PRE_COPY\n");50 break;51 case VFIO_DEVICE_STATE_PRE_COPY_P2P:52 seq_puts(seq, "PRE_COPY_P2P\n");53 break;54 default:55 seq_puts(seq, "Invalid\n");56 }57 58 return 0;59}60 61void vfio_device_debugfs_init(struct vfio_device *vdev)62{63 struct device *dev = &vdev->device;64 65 vdev->debug_root = debugfs_create_dir(dev_name(vdev->dev),66 vfio_debugfs_root);67 68 if (vdev->mig_ops) {69 struct dentry *vfio_dev_migration = NULL;70 71 vfio_dev_migration = debugfs_create_dir("migration",72 vdev->debug_root);73 debugfs_create_devm_seqfile(dev, "state", vfio_dev_migration,74 vfio_device_state_read);75 }76}77 78void vfio_device_debugfs_exit(struct vfio_device *vdev)79{80 debugfs_remove_recursive(vdev->debug_root);81}82 83void vfio_debugfs_create_root(void)84{85 vfio_debugfs_root = debugfs_create_dir("vfio", NULL);86}87 88void vfio_debugfs_remove_root(void)89{90 debugfs_remove_recursive(vfio_debugfs_root);91 vfio_debugfs_root = NULL;92}93