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 two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * 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 OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 34 #include <linux/debugfs.h> 35 #include <linux/module.h> 36 37 #include "usnic.h" 38 #include "usnic_log.h" 39 #include "usnic_debugfs.h" 40 #include "usnic_ib_qp_grp.h" 41 #include "usnic_transport.h" 42 43 static struct dentry *debugfs_root; 44 static struct dentry *flows_dentry; 45 46 static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data, 47 size_t count, loff_t *ppos) 48 { 49 char buf[500]; 50 int res; 51 52 if (*ppos > 0) 53 return 0; 54 55 res = scnprintf(buf, sizeof(buf), 56 "version: %s\n" 57 "build date: %s\n", 58 DRV_VERSION, DRV_RELDATE); 59 60 return simple_read_from_buffer(data, count, ppos, buf, res); 61 } 62 63 static const struct file_operations usnic_debugfs_buildinfo_ops = { 64 .owner = THIS_MODULE, 65 .open = simple_open, 66 .read = usnic_debugfs_buildinfo_read 67 }; 68 69 static ssize_t flowinfo_read(struct file *f, char __user *data, 70 size_t count, loff_t *ppos) 71 { 72 struct usnic_ib_qp_grp_flow *qp_flow; 73 int n; 74 int left; 75 char *ptr; 76 char buf[512]; 77 78 qp_flow = f->private_data; 79 ptr = buf; 80 left = count; 81 82 if (*ppos > 0) 83 return 0; 84 85 spin_lock(&qp_flow->qp_grp->lock); 86 n = scnprintf(ptr, left, 87 "QP Grp ID: %d Transport: %s ", 88 qp_flow->qp_grp->grp_id, 89 usnic_transport_to_str(qp_flow->trans_type)); 90 UPDATE_PTR_LEFT(n, ptr, left); 91 if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) { 92 n = scnprintf(ptr, left, "Port_Num:%hu\n", 93 qp_flow->usnic_roce.port_num); 94 UPDATE_PTR_LEFT(n, ptr, left); 95 } else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) { 96 n = usnic_transport_sock_to_str(ptr, left, 97 qp_flow->udp.sock); 98 UPDATE_PTR_LEFT(n, ptr, left); 99 n = scnprintf(ptr, left, "\n"); 100 UPDATE_PTR_LEFT(n, ptr, left); 101 } 102 spin_unlock(&qp_flow->qp_grp->lock); 103 104 return simple_read_from_buffer(data, count, ppos, buf, ptr - buf); 105 } 106 107 static const struct file_operations flowinfo_ops = { 108 .owner = THIS_MODULE, 109 .open = simple_open, 110 .read = flowinfo_read, 111 }; 112 113 void usnic_debugfs_init(void) 114 { 115 debugfs_root = debugfs_create_dir(DRV_NAME, NULL); 116 117 flows_dentry = debugfs_create_dir("flows", debugfs_root); 118 119 debugfs_create_file("build-info", S_IRUGO, debugfs_root, 120 NULL, &usnic_debugfs_buildinfo_ops); 121 } 122 123 void usnic_debugfs_exit(void) 124 { 125 debugfs_remove_recursive(debugfs_root); 126 debugfs_root = NULL; 127 } 128 129 void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow) 130 { 131 scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name), 132 "%u", qp_flow->flow->flow_id); 133 qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name, 134 S_IRUGO, 135 flows_dentry, 136 qp_flow, 137 &flowinfo_ops); 138 } 139 140 void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow) 141 { 142 debugfs_remove(qp_flow->dbgfs_dentry); 143 } 144