180 lines
4.5 KiB
C
180 lines
4.5 KiB
C
/*
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* Linux MegaRAID driver for SAS based RAID controllers
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*
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* Copyright (c) 2003-2018 LSI Corporation.
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* Copyright (c) 2003-2018 Avago Technologies.
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* Copyright (c) 2003-2018 Broadcom Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Broadcom Inc.
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* Kashyap Desai <kashyap.desai@broadcom.com>
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* Sumit Saxena <sumit.saxena@broadcom.com>
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* Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
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*
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* Send feedback to: megaraidlinux.pdl@broadcom.com
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/compat.h>
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#include <linux/irq_poll.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include "megaraid_sas_fusion.h"
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#include "megaraid_sas.h"
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#ifdef CONFIG_DEBUG_FS
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#include <linux/debugfs.h>
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struct dentry *megasas_debugfs_root;
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static ssize_t
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megasas_debugfs_read(struct file *filp, char __user *ubuf, size_t cnt,
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loff_t *ppos)
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{
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struct megasas_debugfs_buffer *debug = filp->private_data;
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if (!debug || !debug->buf)
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return 0;
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return simple_read_from_buffer(ubuf, cnt, ppos, debug->buf, debug->len);
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}
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static int
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megasas_debugfs_raidmap_open(struct inode *inode, struct file *file)
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{
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struct megasas_instance *instance = inode->i_private;
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struct megasas_debugfs_buffer *debug;
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struct fusion_context *fusion;
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fusion = instance->ctrl_context;
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debug = kzalloc(sizeof(struct megasas_debugfs_buffer), GFP_KERNEL);
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if (!debug)
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return -ENOMEM;
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debug->buf = (void *)fusion->ld_drv_map[(instance->map_id & 1)];
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debug->len = fusion->drv_map_sz;
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file->private_data = debug;
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return 0;
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}
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static int
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megasas_debugfs_release(struct inode *inode, struct file *file)
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{
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struct megasas_debug_buffer *debug = file->private_data;
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if (!debug)
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return 0;
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file->private_data = NULL;
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kfree(debug);
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return 0;
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}
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static const struct file_operations megasas_debugfs_raidmap_fops = {
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.owner = THIS_MODULE,
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.open = megasas_debugfs_raidmap_open,
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.read = megasas_debugfs_read,
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.release = megasas_debugfs_release,
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};
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/*
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* megasas_init_debugfs : Create debugfs root for megaraid_sas driver
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*/
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void megasas_init_debugfs(void)
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{
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megasas_debugfs_root = debugfs_create_dir("megaraid_sas", NULL);
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if (!megasas_debugfs_root)
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pr_info("Cannot create debugfs root\n");
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}
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/*
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* megasas_exit_debugfs : Remove debugfs root for megaraid_sas driver
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*/
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void megasas_exit_debugfs(void)
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{
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debugfs_remove_recursive(megasas_debugfs_root);
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}
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/*
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* megasas_setup_debugfs : Setup debugfs per Fusion adapter
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* instance: Soft instance of adapter
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*/
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void
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megasas_setup_debugfs(struct megasas_instance *instance)
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{
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char name[64];
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struct fusion_context *fusion;
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fusion = instance->ctrl_context;
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if (fusion) {
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snprintf(name, sizeof(name),
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"scsi_host%d", instance->host->host_no);
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if (!instance->debugfs_root) {
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instance->debugfs_root =
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debugfs_create_dir(name, megasas_debugfs_root);
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if (!instance->debugfs_root) {
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dev_err(&instance->pdev->dev,
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"Cannot create per adapter debugfs directory\n");
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return;
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}
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}
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snprintf(name, sizeof(name), "raidmap_dump");
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instance->raidmap_dump =
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debugfs_create_file(name, S_IRUGO,
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instance->debugfs_root, instance,
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&megasas_debugfs_raidmap_fops);
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if (!instance->raidmap_dump) {
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dev_err(&instance->pdev->dev,
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"Cannot create raidmap debugfs file\n");
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debugfs_remove(instance->debugfs_root);
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return;
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}
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}
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}
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/*
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* megasas_destroy_debugfs : Destroy debugfs per Fusion adapter
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* instance: Soft instance of adapter
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*/
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void megasas_destroy_debugfs(struct megasas_instance *instance)
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{
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debugfs_remove_recursive(instance->debugfs_root);
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}
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#else
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void megasas_init_debugfs(void)
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{
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}
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void megasas_exit_debugfs(void)
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{
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}
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void megasas_setup_debugfs(struct megasas_instance *instance)
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{
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}
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void megasas_destroy_debugfs(struct megasas_instance *instance)
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{
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}
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#endif /*CONFIG_DEBUG_FS*/
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