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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | // SPDX-License-Identifier: GPL-2.0 /* * Debugfs interface Support for MPT (Message Passing Technology) based * controllers. * * Copyright (C) 2020 Broadcom Inc. * * Authors: Broadcom Inc. * Sreekanth Reddy <sreekanth.reddy@broadcom.com> * Suganath Prabu <suganath-prabu.subramani@broadcom.com> * * Send feedback to : MPT-FusionLinux.pdl@broadcom.com) * **/ #include <linux/kernel.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/compat.h> #include <linux/uio.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include "mpt3sas_base.h" #include <linux/debugfs.h> static struct dentry *mpt3sas_debugfs_root; /* * _debugfs_iocdump_read - copy ioc dump from debugfs buffer * @filep: File Pointer * @ubuf: Buffer to fill data * @cnt: Length of the buffer * @ppos: Offset in the file */ static ssize_t _debugfs_iocdump_read(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos) { struct mpt3sas_debugfs_buffer *debug = filp->private_data; if (!debug || !debug->buf) return 0; return simple_read_from_buffer(ubuf, cnt, ppos, debug->buf, debug->len); } /* * _debugfs_iocdump_open : open the ioc_dump debugfs attribute file */ static int _debugfs_iocdump_open(struct inode *inode, struct file *file) { struct MPT3SAS_ADAPTER *ioc = inode->i_private; struct mpt3sas_debugfs_buffer *debug; debug = kzalloc(sizeof(struct mpt3sas_debugfs_buffer), GFP_KERNEL); if (!debug) return -ENOMEM; debug->buf = (void *)ioc; debug->len = sizeof(struct MPT3SAS_ADAPTER); file->private_data = debug; return 0; } /* * _debugfs_iocdump_release : release the ioc_dump debugfs attribute * @inode: inode structure to the corresponds device * @file: File pointer */ static int _debugfs_iocdump_release(struct inode *inode, struct file *file) { struct mpt3sas_debugfs_buffer *debug = file->private_data; if (!debug) return 0; file->private_data = NULL; kfree(debug); return 0; } static const struct file_operations mpt3sas_debugfs_iocdump_fops = { .owner = THIS_MODULE, .open = _debugfs_iocdump_open, .read = _debugfs_iocdump_read, .release = _debugfs_iocdump_release, }; /* * mpt3sas_init_debugfs : Create debugfs root for mpt3sas driver */ void mpt3sas_init_debugfs(void) { mpt3sas_debugfs_root = debugfs_create_dir("mpt3sas", NULL); if (!mpt3sas_debugfs_root) pr_info("mpt3sas: Cannot create debugfs root\n"); } /* * mpt3sas_exit_debugfs : Remove debugfs root for mpt3sas driver */ void mpt3sas_exit_debugfs(void) { debugfs_remove_recursive(mpt3sas_debugfs_root); } /* * mpt3sas_setup_debugfs : Setup debugfs per HBA adapter * ioc: MPT3SAS_ADAPTER object */ void mpt3sas_setup_debugfs(struct MPT3SAS_ADAPTER *ioc) { char name[64]; snprintf(name, sizeof(name), "scsi_host%d", ioc->shost->host_no); if (!ioc->debugfs_root) { ioc->debugfs_root = debugfs_create_dir(name, mpt3sas_debugfs_root); if (!ioc->debugfs_root) { dev_err(&ioc->pdev->dev, "Cannot create per adapter debugfs directory\n"); return; } } snprintf(name, sizeof(name), "ioc_dump"); ioc->ioc_dump = debugfs_create_file(name, 0444, ioc->debugfs_root, ioc, &mpt3sas_debugfs_iocdump_fops); if (!ioc->ioc_dump) { dev_err(&ioc->pdev->dev, "Cannot create ioc_dump debugfs file\n"); debugfs_remove(ioc->debugfs_root); return; } snprintf(name, sizeof(name), "host_recovery"); debugfs_create_u8(name, 0444, ioc->debugfs_root, &ioc->shost_recovery); } /* * mpt3sas_destroy_debugfs : Destroy debugfs per HBA adapter * @ioc: MPT3SAS_ADAPTER object */ void mpt3sas_destroy_debugfs(struct MPT3SAS_ADAPTER *ioc) { debugfs_remove_recursive(ioc->debugfs_root); } |