/*
* 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 <[email protected]>
* Sumit Saxena <[email protected]>
* Shivasharan S <[email protected]>
*
* Send feedback to: [email protected]
*/
#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*/
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