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1/*2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * provided with the distribution.22 *23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 *32 */33 34#include <linux/debugfs.h>35 36#include "usnic.h"37#include "usnic_log.h"38#include "usnic_debugfs.h"39#include "usnic_ib_qp_grp.h"40#include "usnic_transport.h"41 42static struct dentry *debugfs_root;43static struct dentry *flows_dentry;44 45static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,46 size_t count, loff_t *ppos)47{48 char buf[500];49 int res;50 51 if (*ppos > 0)52 return 0;53 54 res = scnprintf(buf, sizeof(buf),55 "version: %s\n"56 "build date: %s\n",57 DRV_VERSION, DRV_RELDATE);58 59 return simple_read_from_buffer(data, count, ppos, buf, res);60}61 62static const struct file_operations usnic_debugfs_buildinfo_ops = {63 .owner = THIS_MODULE,64 .open = simple_open,65 .read = usnic_debugfs_buildinfo_read66};67 68static ssize_t flowinfo_read(struct file *f, char __user *data,69 size_t count, loff_t *ppos)70{71 struct usnic_ib_qp_grp_flow *qp_flow;72 int n;73 int left;74 char *ptr;75 char buf[512];76 77 qp_flow = f->private_data;78 ptr = buf;79 left = count;80 81 if (*ppos > 0)82 return 0;83 84 spin_lock(&qp_flow->qp_grp->lock);85 n = scnprintf(ptr, left,86 "QP Grp ID: %d Transport: %s ",87 qp_flow->qp_grp->grp_id,88 usnic_transport_to_str(qp_flow->trans_type));89 UPDATE_PTR_LEFT(n, ptr, left);90 if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {91 n = scnprintf(ptr, left, "Port_Num:%hu\n",92 qp_flow->usnic_roce.port_num);93 UPDATE_PTR_LEFT(n, ptr, left);94 } else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {95 n = usnic_transport_sock_to_str(ptr, left,96 qp_flow->udp.sock);97 UPDATE_PTR_LEFT(n, ptr, left);98 n = scnprintf(ptr, left, "\n");99 UPDATE_PTR_LEFT(n, ptr, left);100 }101 spin_unlock(&qp_flow->qp_grp->lock);102 103 return simple_read_from_buffer(data, count, ppos, buf, ptr - buf);104}105 106static const struct file_operations flowinfo_ops = {107 .owner = THIS_MODULE,108 .open = simple_open,109 .read = flowinfo_read,110};111 112void usnic_debugfs_init(void)113{114 debugfs_root = debugfs_create_dir(DRV_NAME, NULL);115 116 flows_dentry = debugfs_create_dir("flows", debugfs_root);117 118 debugfs_create_file("build-info", S_IRUGO, debugfs_root,119 NULL, &usnic_debugfs_buildinfo_ops);120}121 122void usnic_debugfs_exit(void)123{124 debugfs_remove_recursive(debugfs_root);125 debugfs_root = NULL;126}127 128void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)129{130 scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name),131 "%u", qp_flow->flow->flow_id);132 qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,133 S_IRUGO,134 flows_dentry,135 qp_flow,136 &flowinfo_ops);137}138 139void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)140{141 debugfs_remove(qp_flow->dbgfs_dentry);142}143