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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | /* * Linux MegaRAID driver for SAS based RAID controllers * * Copyright (c) 2003-2018 LSI Corporation. * Copyright (c) 2003-2018 Avago Technologies. * Copyright (c) 2003-2018 Broadcom Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Authors: Broadcom Inc. * Kashyap Desai <kashyap.desai@broadcom.com> * Sumit Saxena <sumit.saxena@broadcom.com> * Shivasharan S <shivasharan.srikanteshwara@broadcom.com> * * Send feedback to: megaraidlinux.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/irq_poll.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include "megaraid_sas_fusion.h" #include "megaraid_sas.h" #ifdef CONFIG_DEBUG_FS #include <linux/debugfs.h> struct dentry *megasas_debugfs_root; static ssize_t megasas_debugfs_read(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos) { struct megasas_debugfs_buffer *debug = filp->private_data; if (!debug || !debug->buf) return 0; return simple_read_from_buffer(ubuf, cnt, ppos, debug->buf, debug->len); } static int megasas_debugfs_raidmap_open(struct inode *inode, struct file *file) { struct megasas_instance *instance = inode->i_private; struct megasas_debugfs_buffer *debug; struct fusion_context *fusion; fusion = instance->ctrl_context; debug = kzalloc(sizeof(struct megasas_debugfs_buffer), GFP_KERNEL); if (!debug) return -ENOMEM; debug->buf = (void *)fusion->ld_drv_map[(instance->map_id & 1)]; debug->len = fusion->drv_map_sz; file->private_data = debug; return 0; } static int megasas_debugfs_release(struct inode *inode, struct file *file) { struct megasas_debug_buffer *debug = file->private_data; if (!debug) return 0; file->private_data = NULL; kfree(debug); return 0; } static const struct file_operations megasas_debugfs_raidmap_fops = { .owner = THIS_MODULE, .open = megasas_debugfs_raidmap_open, .read = megasas_debugfs_read, .release = megasas_debugfs_release, }; /* * megasas_init_debugfs : Create debugfs root for megaraid_sas driver */ void megasas_init_debugfs(void) { megasas_debugfs_root = debugfs_create_dir("megaraid_sas", NULL); if (!megasas_debugfs_root) pr_info("Cannot create debugfs root\n"); } /* * megasas_exit_debugfs : Remove debugfs root for megaraid_sas driver */ void megasas_exit_debugfs(void) { debugfs_remove_recursive(megasas_debugfs_root); } /* * megasas_setup_debugfs : Setup debugfs per Fusion adapter * instance: Soft instance of adapter */ void megasas_setup_debugfs(struct megasas_instance *instance) { char name[64]; struct fusion_context *fusion; fusion = instance->ctrl_context; if (fusion) { snprintf(name, sizeof(name), "scsi_host%d", instance->host->host_no); if (!instance->debugfs_root) { instance->debugfs_root = debugfs_create_dir(name, megasas_debugfs_root); if (!instance->debugfs_root) { dev_err(&instance->pdev->dev, "Cannot create per adapter debugfs directory\n"); return; } } snprintf(name, sizeof(name), "raidmap_dump"); instance->raidmap_dump = debugfs_create_file(name, S_IRUGO, instance->debugfs_root, instance, &megasas_debugfs_raidmap_fops); if (!instance->raidmap_dump) { dev_err(&instance->pdev->dev, "Cannot create raidmap debugfs file\n"); debugfs_remove(instance->debugfs_root); return; } } } /* * megasas_destroy_debugfs : Destroy debugfs per Fusion adapter * instance: Soft instance of adapter */ void megasas_destroy_debugfs(struct megasas_instance *instance) { debugfs_remove_recursive(instance->debugfs_root); } #else void megasas_init_debugfs(void) { } void megasas_exit_debugfs(void) { } void megasas_setup_debugfs(struct megasas_instance *instance) { } void megasas_destroy_debugfs(struct megasas_instance *instance) { } #endif /*CONFIG_DEBUG_FS*/ |