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 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 42 static struct dentry *debugfs_root; 43 static struct dentry *flows_dentry; 44 45 static 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 62 static const struct file_operations usnic_debugfs_buildinfo_ops = { 63 .owner = THIS_MODULE, 64 .open = simple_open, 65 .read = usnic_debugfs_buildinfo_read 66 }; 67 68 static 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 } 105 106 static const struct file_operations flowinfo_ops = { 107 .owner = THIS_MODULE, 108 .open = simple_open, 109 .read = flowinfo_read, 110 }; 111 112 void 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 } 121 122 void usnic_debugfs_exit(void) 123 { 124 debugfs_remove_recursive(debugfs_root); 125 debugfs_root = NULL; 126 } 127 128 void 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 } 138 139 void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow) 140 { 141 debugfs_remove(qp_flow->dbgfs_dentry); 142 } 143