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/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/debugfs.h>
#include <linux/module.h>
#include "usnic.h"
#include "usnic_log.h"
#include "usnic_debugfs.h"
#include "usnic_ib_qp_grp.h"
#include "usnic_transport.h"
static struct dentry *debugfs_root;
static struct dentry *flows_dentry;
static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
size_t count, loff_t *ppos)
{
char buf[500];
int res;
if (*ppos > 0)
return 0;
res = scnprintf(buf, sizeof(buf),
"version: %s\n"
"build date: %s\n",
DRV_VERSION, DRV_RELDATE);
return simple_read_from_buffer(data, count, ppos, buf, res);
}
static const struct file_operations usnic_debugfs_buildinfo_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = usnic_debugfs_buildinfo_read
};
static ssize_t flowinfo_read(struct file *f, char __user *data,
size_t count, loff_t *ppos)
{
struct usnic_ib_qp_grp_flow *qp_flow;
int n;
int left;
char *ptr;
char buf[512];
qp_flow = f->private_data;
ptr = buf;
left = count;
if (*ppos > 0)
return 0;
spin_lock(&qp_flow->qp_grp->lock);
n = scnprintf(ptr, left,
"QP Grp ID: %d Transport: %s ",
qp_flow->qp_grp->grp_id,
usnic_transport_to_str(qp_flow->trans_type));
UPDATE_PTR_LEFT(n, ptr, left);
if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {
n = scnprintf(ptr, left, "Port_Num:%hu\n",
qp_flow->usnic_roce.port_num);
UPDATE_PTR_LEFT(n, ptr, left);
} else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {
n = usnic_transport_sock_to_str(ptr, left,
qp_flow->udp.sock);
UPDATE_PTR_LEFT(n, ptr, left);
n = scnprintf(ptr, left, "\n");
UPDATE_PTR_LEFT(n, ptr, left);
}
spin_unlock(&qp_flow->qp_grp->lock);
return simple_read_from_buffer(data, count, ppos, buf, ptr - buf);
}
static const struct file_operations flowinfo_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = flowinfo_read,
};
void usnic_debugfs_init(void)
{
debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
if (IS_ERR(debugfs_root)) {
usnic_err("Failed to create debugfs root dir, check if debugfs is enabled in kernel configuration\n");
goto out_clear_root;
}
flows_dentry = debugfs_create_dir("flows", debugfs_root);
if (IS_ERR_OR_NULL(flows_dentry)) {
usnic_err("Failed to create debugfs flow dir with err %ld\n",
PTR_ERR(flows_dentry));
goto out_free_root;
}
debugfs_create_file("build-info", S_IRUGO, debugfs_root,
NULL, &usnic_debugfs_buildinfo_ops);
return;
out_free_root:
debugfs_remove_recursive(debugfs_root);
out_clear_root:
debugfs_root = NULL;
}
void usnic_debugfs_exit(void)
{
if (!debugfs_root)
return;
debugfs_remove_recursive(debugfs_root);
debugfs_root = NULL;
}
void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)
{
if (IS_ERR_OR_NULL(flows_dentry))
return;
scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name),
"%u", qp_flow->flow->flow_id);
qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,
S_IRUGO,
flows_dentry,
qp_flow,
&flowinfo_ops);
if (IS_ERR_OR_NULL(qp_flow->dbgfs_dentry)) {
usnic_err("Failed to create dbg fs entry for flow %u with error %ld\n",
qp_flow->flow->flow_id,
PTR_ERR(qp_flow->dbgfs_dentry));
}
}
void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
{
if (!IS_ERR_OR_NULL(qp_flow->dbgfs_dentry))
debugfs_remove(qp_flow->dbgfs_dentry);
}
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