1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004 Topspin Communications. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <linux/err.h> 36 #include <linux/seq_file.h> 37 38 struct file_operations; 39 40 #include <linux/debugfs.h> 41 42 #include "ipoib.h" 43 44 static struct dentry *ipoib_root; 45 46 static void format_gid(union ib_gid *gid, char *buf) 47 { 48 int i, n; 49 50 for (n = 0, i = 0; i < 8; ++i) { 51 n += sprintf(buf + n, "%x", 52 be16_to_cpu(((__be16 *) gid->raw)[i])); 53 if (i < 7) 54 buf[n++] = ':'; 55 } 56 } 57 58 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos) 59 { 60 struct ipoib_mcast_iter *iter; 61 loff_t n = *pos; 62 63 iter = ipoib_mcast_iter_init(file->private); 64 if (!iter) 65 return NULL; 66 67 while (n--) { 68 if (ipoib_mcast_iter_next(iter)) { 69 kfree(iter); 70 return NULL; 71 } 72 } 73 74 return iter; 75 } 76 77 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr, 78 loff_t *pos) 79 { 80 struct ipoib_mcast_iter *iter = iter_ptr; 81 82 (*pos)++; 83 84 if (ipoib_mcast_iter_next(iter)) { 85 kfree(iter); 86 return NULL; 87 } 88 89 return iter; 90 } 91 92 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr) 93 { 94 /* nothing for now */ 95 } 96 97 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr) 98 { 99 struct ipoib_mcast_iter *iter = iter_ptr; 100 char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"]; 101 union ib_gid mgid; 102 unsigned long created; 103 unsigned int queuelen, complete, send_only; 104 105 if (!iter) 106 return 0; 107 108 ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen, 109 &complete, &send_only); 110 111 format_gid(&mgid, gid_buf); 112 113 seq_printf(file, 114 "GID: %s\n" 115 " created: %10ld\n" 116 " queuelen: %9d\n" 117 " complete: %9s\n" 118 " send_only: %8s\n" 119 "\n", 120 gid_buf, created, queuelen, 121 complete ? "yes" : "no", 122 send_only ? "yes" : "no"); 123 124 return 0; 125 } 126 127 static const struct seq_operations ipoib_mcg_seq_ops = { 128 .start = ipoib_mcg_seq_start, 129 .next = ipoib_mcg_seq_next, 130 .stop = ipoib_mcg_seq_stop, 131 .show = ipoib_mcg_seq_show, 132 }; 133 134 static int ipoib_mcg_open(struct inode *inode, struct file *file) 135 { 136 struct seq_file *seq; 137 int ret; 138 139 ret = seq_open(file, &ipoib_mcg_seq_ops); 140 if (ret) 141 return ret; 142 143 seq = file->private_data; 144 seq->private = inode->i_private; 145 146 return 0; 147 } 148 149 static const struct file_operations ipoib_mcg_fops = { 150 .owner = THIS_MODULE, 151 .open = ipoib_mcg_open, 152 .read = seq_read, 153 .llseek = seq_lseek, 154 .release = seq_release 155 }; 156 157 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos) 158 { 159 struct ipoib_path_iter *iter; 160 loff_t n = *pos; 161 162 iter = ipoib_path_iter_init(file->private); 163 if (!iter) 164 return NULL; 165 166 while (n--) { 167 if (ipoib_path_iter_next(iter)) { 168 kfree(iter); 169 return NULL; 170 } 171 } 172 173 return iter; 174 } 175 176 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr, 177 loff_t *pos) 178 { 179 struct ipoib_path_iter *iter = iter_ptr; 180 181 (*pos)++; 182 183 if (ipoib_path_iter_next(iter)) { 184 kfree(iter); 185 return NULL; 186 } 187 188 return iter; 189 } 190 191 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr) 192 { 193 /* nothing for now */ 194 } 195 196 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr) 197 { 198 struct ipoib_path_iter *iter = iter_ptr; 199 char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"]; 200 struct ipoib_path path; 201 int rate; 202 203 if (!iter) 204 return 0; 205 206 ipoib_path_iter_read(iter, &path); 207 208 format_gid(&path.pathrec.dgid, gid_buf); 209 210 seq_printf(file, 211 "GID: %s\n" 212 " complete: %6s\n", 213 gid_buf, path.pathrec.dlid ? "yes" : "no"); 214 215 if (path.pathrec.dlid) { 216 rate = ib_rate_to_mult(path.pathrec.rate) * 25; 217 218 seq_printf(file, 219 " DLID: 0x%04x\n" 220 " SL: %12d\n" 221 " rate: %*d%s Gb/sec\n", 222 be16_to_cpu(path.pathrec.dlid), 223 path.pathrec.sl, 224 10 - ((rate % 10) ? 2 : 0), 225 rate / 10, rate % 10 ? ".5" : ""); 226 } 227 228 seq_putc(file, '\n'); 229 230 return 0; 231 } 232 233 static const struct seq_operations ipoib_path_seq_ops = { 234 .start = ipoib_path_seq_start, 235 .next = ipoib_path_seq_next, 236 .stop = ipoib_path_seq_stop, 237 .show = ipoib_path_seq_show, 238 }; 239 240 static int ipoib_path_open(struct inode *inode, struct file *file) 241 { 242 struct seq_file *seq; 243 int ret; 244 245 ret = seq_open(file, &ipoib_path_seq_ops); 246 if (ret) 247 return ret; 248 249 seq = file->private_data; 250 seq->private = inode->i_private; 251 252 return 0; 253 } 254 255 static const struct file_operations ipoib_path_fops = { 256 .owner = THIS_MODULE, 257 .open = ipoib_path_open, 258 .read = seq_read, 259 .llseek = seq_lseek, 260 .release = seq_release 261 }; 262 263 void ipoib_create_debug_files(struct ifnet *dev) 264 { 265 struct ipoib_dev_priv *priv = dev->if_softc; 266 char name[IFNAMSIZ + sizeof "_path"]; 267 268 snprintf(name, sizeof name, "%s_mcg", if_name(dev)); 269 priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO, 270 ipoib_root, dev, &ipoib_mcg_fops); 271 if (!priv->mcg_dentry) 272 ipoib_warn(priv, "failed to create mcg debug file\n"); 273 274 snprintf(name, sizeof name, "%s_path", if_name(dev)); 275 priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO, 276 ipoib_root, dev, &ipoib_path_fops); 277 if (!priv->path_dentry) 278 ipoib_warn(priv, "failed to create path debug file\n"); 279 } 280 281 void ipoib_delete_debug_files(struct ifnet *dev) 282 { 283 struct ipoib_dev_priv *priv = dev->if_softc; 284 285 if (priv->mcg_dentry) 286 debugfs_remove(priv->mcg_dentry); 287 if (priv->path_dentry) 288 debugfs_remove(priv->path_dentry); 289 } 290 291 int ipoib_register_debugfs(void) 292 { 293 ipoib_root = debugfs_create_dir("ipoib", NULL); 294 return ipoib_root ? 0 : -ENOMEM; 295 } 296 297 void ipoib_unregister_debugfs(void) 298 { 299 debugfs_remove(ipoib_root); 300 } 301