Mike Marciniszyn | 7724105 | 2015-07-30 15:17:43 -0400 | [diff] [blame] | 1 | #ifdef CONFIG_DEBUG_FS |
| 2 | /* |
| 3 | * |
| 4 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 5 | * redistributing this file, you may do so under either license. |
| 6 | * |
| 7 | * GPL LICENSE SUMMARY |
| 8 | * |
| 9 | * Copyright(c) 2015 Intel Corporation. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of version 2 of the GNU General Public License as |
| 13 | * published by the Free Software Foundation. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * BSD LICENSE |
| 21 | * |
| 22 | * Copyright(c) 2015 Intel Corporation. |
| 23 | * |
| 24 | * Redistribution and use in source and binary forms, with or without |
| 25 | * modification, are permitted provided that the following conditions |
| 26 | * are met: |
| 27 | * |
| 28 | * - Redistributions of source code must retain the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer. |
| 30 | * - Redistributions in binary form must reproduce the above copyright |
| 31 | * notice, this list of conditions and the following disclaimer in |
| 32 | * the documentation and/or other materials provided with the |
| 33 | * distribution. |
| 34 | * - Neither the name of Intel Corporation nor the names of its |
| 35 | * contributors may be used to endorse or promote products derived |
| 36 | * from this software without specific prior written permission. |
| 37 | * |
| 38 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 39 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 40 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 41 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 42 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 44 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 45 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 46 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 47 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 48 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 49 | * |
| 50 | */ |
| 51 | #include <linux/debugfs.h> |
| 52 | #include <linux/seq_file.h> |
| 53 | #include <linux/kernel.h> |
| 54 | #include <linux/export.h> |
| 55 | |
| 56 | #include "hfi.h" |
| 57 | #include "debugfs.h" |
| 58 | #include "device.h" |
| 59 | #include "qp.h" |
| 60 | #include "sdma.h" |
| 61 | |
| 62 | static struct dentry *hfi1_dbg_root; |
| 63 | |
| 64 | #define private2dd(file) (file_inode(file)->i_private) |
| 65 | #define private2ppd(file) (file_inode(file)->i_private) |
| 66 | |
| 67 | #define DEBUGFS_SEQ_FILE_OPS(name) \ |
| 68 | static const struct seq_operations _##name##_seq_ops = { \ |
| 69 | .start = _##name##_seq_start, \ |
| 70 | .next = _##name##_seq_next, \ |
| 71 | .stop = _##name##_seq_stop, \ |
| 72 | .show = _##name##_seq_show \ |
| 73 | } |
| 74 | #define DEBUGFS_SEQ_FILE_OPEN(name) \ |
| 75 | static int _##name##_open(struct inode *inode, struct file *s) \ |
| 76 | { \ |
| 77 | struct seq_file *seq; \ |
| 78 | int ret; \ |
| 79 | ret = seq_open(s, &_##name##_seq_ops); \ |
| 80 | if (ret) \ |
| 81 | return ret; \ |
| 82 | seq = s->private_data; \ |
| 83 | seq->private = inode->i_private; \ |
| 84 | return 0; \ |
| 85 | } |
| 86 | |
| 87 | #define DEBUGFS_FILE_OPS(name) \ |
| 88 | static const struct file_operations _##name##_file_ops = { \ |
| 89 | .owner = THIS_MODULE, \ |
| 90 | .open = _##name##_open, \ |
| 91 | .read = seq_read, \ |
| 92 | .llseek = seq_lseek, \ |
| 93 | .release = seq_release \ |
| 94 | } |
| 95 | |
| 96 | #define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \ |
| 97 | do { \ |
| 98 | struct dentry *ent; \ |
| 99 | ent = debugfs_create_file(name, mode, parent, \ |
| 100 | data, ops); \ |
| 101 | if (!ent) \ |
| 102 | pr_warn("create of %s failed\n", name); \ |
| 103 | } while (0) |
| 104 | |
| 105 | |
| 106 | #define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \ |
| 107 | DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO) |
| 108 | |
| 109 | static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos) |
| 110 | __acquires(RCU) |
| 111 | { |
| 112 | struct hfi1_opcode_stats_perctx *opstats; |
| 113 | |
| 114 | rcu_read_lock(); |
| 115 | if (*pos >= ARRAY_SIZE(opstats->stats)) |
| 116 | return NULL; |
| 117 | return pos; |
| 118 | } |
| 119 | |
| 120 | static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 121 | { |
| 122 | struct hfi1_opcode_stats_perctx *opstats; |
| 123 | |
| 124 | ++*pos; |
| 125 | if (*pos >= ARRAY_SIZE(opstats->stats)) |
| 126 | return NULL; |
| 127 | return pos; |
| 128 | } |
| 129 | |
| 130 | |
| 131 | static void _opcode_stats_seq_stop(struct seq_file *s, void *v) |
| 132 | __releases(RCU) |
| 133 | { |
| 134 | rcu_read_unlock(); |
| 135 | } |
| 136 | |
| 137 | static int _opcode_stats_seq_show(struct seq_file *s, void *v) |
| 138 | { |
| 139 | loff_t *spos = v; |
| 140 | loff_t i = *spos, j; |
| 141 | u64 n_packets = 0, n_bytes = 0; |
| 142 | struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; |
| 143 | struct hfi1_devdata *dd = dd_from_dev(ibd); |
| 144 | |
| 145 | for (j = 0; j < dd->first_user_ctxt; j++) { |
| 146 | if (!dd->rcd[j]) |
| 147 | continue; |
| 148 | n_packets += dd->rcd[j]->opstats->stats[i].n_packets; |
| 149 | n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes; |
| 150 | } |
| 151 | if (!n_packets && !n_bytes) |
| 152 | return SEQ_SKIP; |
| 153 | seq_printf(s, "%02llx %llu/%llu\n", i, |
| 154 | (unsigned long long) n_packets, |
| 155 | (unsigned long long) n_bytes); |
| 156 | |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | DEBUGFS_SEQ_FILE_OPS(opcode_stats); |
| 161 | DEBUGFS_SEQ_FILE_OPEN(opcode_stats) |
| 162 | DEBUGFS_FILE_OPS(opcode_stats); |
| 163 | |
| 164 | static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos) |
| 165 | { |
| 166 | struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; |
| 167 | struct hfi1_devdata *dd = dd_from_dev(ibd); |
| 168 | |
| 169 | if (!*pos) |
| 170 | return SEQ_START_TOKEN; |
| 171 | if (*pos >= dd->first_user_ctxt) |
| 172 | return NULL; |
| 173 | return pos; |
| 174 | } |
| 175 | |
| 176 | static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 177 | { |
| 178 | struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; |
| 179 | struct hfi1_devdata *dd = dd_from_dev(ibd); |
| 180 | |
| 181 | if (v == SEQ_START_TOKEN) |
| 182 | return pos; |
| 183 | |
| 184 | ++*pos; |
| 185 | if (*pos >= dd->first_user_ctxt) |
| 186 | return NULL; |
| 187 | return pos; |
| 188 | } |
| 189 | |
| 190 | static void _ctx_stats_seq_stop(struct seq_file *s, void *v) |
| 191 | { |
| 192 | /* nothing allocated */ |
| 193 | } |
| 194 | |
| 195 | static int _ctx_stats_seq_show(struct seq_file *s, void *v) |
| 196 | { |
| 197 | loff_t *spos; |
| 198 | loff_t i, j; |
| 199 | u64 n_packets = 0; |
| 200 | struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; |
| 201 | struct hfi1_devdata *dd = dd_from_dev(ibd); |
| 202 | |
| 203 | if (v == SEQ_START_TOKEN) { |
| 204 | seq_puts(s, "Ctx:npkts\n"); |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | spos = v; |
| 209 | i = *spos; |
| 210 | |
| 211 | if (!dd->rcd[i]) |
| 212 | return SEQ_SKIP; |
| 213 | |
| 214 | for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++) |
| 215 | n_packets += dd->rcd[i]->opstats->stats[j].n_packets; |
| 216 | |
| 217 | if (!n_packets) |
| 218 | return SEQ_SKIP; |
| 219 | |
| 220 | seq_printf(s, " %llu:%llu\n", i, n_packets); |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | DEBUGFS_SEQ_FILE_OPS(ctx_stats); |
| 225 | DEBUGFS_SEQ_FILE_OPEN(ctx_stats) |
| 226 | DEBUGFS_FILE_OPS(ctx_stats); |
| 227 | |
| 228 | static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos) |
| 229 | __acquires(RCU) |
| 230 | { |
| 231 | struct qp_iter *iter; |
| 232 | loff_t n = *pos; |
| 233 | |
| 234 | rcu_read_lock(); |
| 235 | iter = qp_iter_init(s->private); |
| 236 | if (!iter) |
| 237 | return NULL; |
| 238 | |
| 239 | while (n--) { |
| 240 | if (qp_iter_next(iter)) { |
| 241 | kfree(iter); |
| 242 | return NULL; |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | return iter; |
| 247 | } |
| 248 | |
| 249 | static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr, |
| 250 | loff_t *pos) |
| 251 | { |
| 252 | struct qp_iter *iter = iter_ptr; |
| 253 | |
| 254 | (*pos)++; |
| 255 | |
| 256 | if (qp_iter_next(iter)) { |
| 257 | kfree(iter); |
| 258 | return NULL; |
| 259 | } |
| 260 | |
| 261 | return iter; |
| 262 | } |
| 263 | |
| 264 | static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr) |
| 265 | __releases(RCU) |
| 266 | { |
| 267 | rcu_read_unlock(); |
| 268 | } |
| 269 | |
| 270 | static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr) |
| 271 | { |
| 272 | struct qp_iter *iter = iter_ptr; |
| 273 | |
| 274 | if (!iter) |
| 275 | return 0; |
| 276 | |
| 277 | qp_iter_print(s, iter); |
| 278 | |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | DEBUGFS_SEQ_FILE_OPS(qp_stats); |
| 283 | DEBUGFS_SEQ_FILE_OPEN(qp_stats) |
| 284 | DEBUGFS_FILE_OPS(qp_stats); |
| 285 | |
| 286 | static void *_sdes_seq_start(struct seq_file *s, loff_t *pos) |
| 287 | __acquires(RCU) |
| 288 | { |
| 289 | struct hfi1_ibdev *ibd; |
| 290 | struct hfi1_devdata *dd; |
| 291 | |
| 292 | rcu_read_lock(); |
| 293 | ibd = (struct hfi1_ibdev *)s->private; |
| 294 | dd = dd_from_dev(ibd); |
| 295 | if (!dd->per_sdma || *pos >= dd->num_sdma) |
| 296 | return NULL; |
| 297 | return pos; |
| 298 | } |
| 299 | |
| 300 | static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 301 | { |
| 302 | struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; |
| 303 | struct hfi1_devdata *dd = dd_from_dev(ibd); |
| 304 | |
| 305 | ++*pos; |
| 306 | if (!dd->per_sdma || *pos >= dd->num_sdma) |
| 307 | return NULL; |
| 308 | return pos; |
| 309 | } |
| 310 | |
| 311 | |
| 312 | static void _sdes_seq_stop(struct seq_file *s, void *v) |
| 313 | __releases(RCU) |
| 314 | { |
| 315 | rcu_read_unlock(); |
| 316 | } |
| 317 | |
| 318 | static int _sdes_seq_show(struct seq_file *s, void *v) |
| 319 | { |
| 320 | struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; |
| 321 | struct hfi1_devdata *dd = dd_from_dev(ibd); |
| 322 | loff_t *spos = v; |
| 323 | loff_t i = *spos; |
| 324 | |
| 325 | sdma_seqfile_dump_sde(s, &dd->per_sdma[i]); |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | DEBUGFS_SEQ_FILE_OPS(sdes); |
| 330 | DEBUGFS_SEQ_FILE_OPEN(sdes) |
| 331 | DEBUGFS_FILE_OPS(sdes); |
| 332 | |
| 333 | /* read the per-device counters */ |
| 334 | static ssize_t dev_counters_read(struct file *file, char __user *buf, |
| 335 | size_t count, loff_t *ppos) |
| 336 | { |
| 337 | u64 *counters; |
| 338 | size_t avail; |
| 339 | struct hfi1_devdata *dd; |
| 340 | ssize_t rval; |
| 341 | |
| 342 | rcu_read_lock(); |
| 343 | dd = private2dd(file); |
| 344 | avail = hfi1_read_cntrs(dd, *ppos, NULL, &counters); |
| 345 | rval = simple_read_from_buffer(buf, count, ppos, counters, avail); |
| 346 | rcu_read_unlock(); |
| 347 | return rval; |
| 348 | } |
| 349 | |
| 350 | /* read the per-device counters */ |
| 351 | static ssize_t dev_names_read(struct file *file, char __user *buf, |
| 352 | size_t count, loff_t *ppos) |
| 353 | { |
| 354 | char *names; |
| 355 | size_t avail; |
| 356 | struct hfi1_devdata *dd; |
| 357 | ssize_t rval; |
| 358 | |
| 359 | rcu_read_lock(); |
| 360 | dd = private2dd(file); |
| 361 | avail = hfi1_read_cntrs(dd, *ppos, &names, NULL); |
| 362 | rval = simple_read_from_buffer(buf, count, ppos, names, avail); |
| 363 | rcu_read_unlock(); |
| 364 | return rval; |
| 365 | } |
| 366 | |
| 367 | struct counter_info { |
| 368 | char *name; |
| 369 | const struct file_operations ops; |
| 370 | }; |
| 371 | |
| 372 | /* |
| 373 | * Could use file_inode(file)->i_ino to figure out which file, |
| 374 | * instead of separate routine for each, but for now, this works... |
| 375 | */ |
| 376 | |
| 377 | /* read the per-port names (same for each port) */ |
| 378 | static ssize_t portnames_read(struct file *file, char __user *buf, |
| 379 | size_t count, loff_t *ppos) |
| 380 | { |
| 381 | char *names; |
| 382 | size_t avail; |
| 383 | struct hfi1_devdata *dd; |
| 384 | ssize_t rval; |
| 385 | |
| 386 | rcu_read_lock(); |
| 387 | dd = private2dd(file); |
| 388 | /* port number n/a here since names are constant */ |
| 389 | avail = hfi1_read_portcntrs(dd, *ppos, 0, &names, NULL); |
| 390 | rval = simple_read_from_buffer(buf, count, ppos, names, avail); |
| 391 | rcu_read_unlock(); |
| 392 | return rval; |
| 393 | } |
| 394 | |
| 395 | /* read the per-port counters */ |
| 396 | static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf, |
| 397 | size_t count, loff_t *ppos) |
| 398 | { |
| 399 | u64 *counters; |
| 400 | size_t avail; |
| 401 | struct hfi1_devdata *dd; |
| 402 | struct hfi1_pportdata *ppd; |
| 403 | ssize_t rval; |
| 404 | |
| 405 | rcu_read_lock(); |
| 406 | ppd = private2ppd(file); |
| 407 | dd = ppd->dd; |
| 408 | avail = hfi1_read_portcntrs(dd, *ppos, ppd->port - 1, NULL, &counters); |
| 409 | rval = simple_read_from_buffer(buf, count, ppos, counters, avail); |
| 410 | rcu_read_unlock(); |
| 411 | return rval; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * read the per-port QSFP data for ppd |
| 416 | */ |
| 417 | static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf, |
| 418 | size_t count, loff_t *ppos) |
| 419 | { |
| 420 | struct hfi1_pportdata *ppd; |
| 421 | char *tmp; |
| 422 | int ret; |
| 423 | |
| 424 | rcu_read_lock(); |
| 425 | ppd = private2ppd(file); |
| 426 | tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 427 | if (!tmp) { |
| 428 | rcu_read_unlock(); |
| 429 | return -ENOMEM; |
| 430 | } |
| 431 | |
| 432 | ret = qsfp_dump(ppd, tmp, PAGE_SIZE); |
| 433 | if (ret > 0) |
| 434 | ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); |
| 435 | rcu_read_unlock(); |
| 436 | kfree(tmp); |
| 437 | return ret; |
| 438 | } |
| 439 | |
| 440 | /* Do an i2c write operation on the chain for the given HFI. */ |
| 441 | static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf, |
| 442 | size_t count, loff_t *ppos, u32 target) |
| 443 | { |
| 444 | struct hfi1_pportdata *ppd; |
| 445 | char *buff; |
| 446 | int ret; |
| 447 | int i2c_addr; |
| 448 | int offset; |
| 449 | int total_written; |
| 450 | |
| 451 | rcu_read_lock(); |
| 452 | ppd = private2ppd(file); |
| 453 | |
| 454 | buff = kmalloc(count, GFP_KERNEL); |
| 455 | if (!buff) { |
| 456 | ret = -ENOMEM; |
| 457 | goto _return; |
| 458 | } |
| 459 | |
| 460 | ret = copy_from_user(buff, buf, count); |
| 461 | if (ret > 0) { |
| 462 | ret = -EFAULT; |
| 463 | goto _free; |
| 464 | } |
| 465 | |
| 466 | i2c_addr = (*ppos >> 16) & 0xff; |
| 467 | offset = *ppos & 0xffff; |
| 468 | |
| 469 | total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count); |
| 470 | if (total_written < 0) { |
| 471 | ret = total_written; |
| 472 | goto _free; |
| 473 | } |
| 474 | |
| 475 | *ppos += total_written; |
| 476 | |
| 477 | ret = total_written; |
| 478 | |
| 479 | _free: |
| 480 | kfree(buff); |
| 481 | _return: |
| 482 | rcu_read_unlock(); |
| 483 | return ret; |
| 484 | } |
| 485 | |
| 486 | /* Do an i2c write operation on chain for HFI 0. */ |
| 487 | static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf, |
| 488 | size_t count, loff_t *ppos) |
| 489 | { |
| 490 | return __i2c_debugfs_write(file, buf, count, ppos, 0); |
| 491 | } |
| 492 | |
| 493 | /* Do an i2c write operation on chain for HFI 1. */ |
| 494 | static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf, |
| 495 | size_t count, loff_t *ppos) |
| 496 | { |
| 497 | return __i2c_debugfs_write(file, buf, count, ppos, 1); |
| 498 | } |
| 499 | |
| 500 | /* Do an i2c read operation on the chain for the given HFI. */ |
| 501 | static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf, |
| 502 | size_t count, loff_t *ppos, u32 target) |
| 503 | { |
| 504 | struct hfi1_pportdata *ppd; |
| 505 | char *buff; |
| 506 | int ret; |
| 507 | int i2c_addr; |
| 508 | int offset; |
| 509 | int total_read; |
| 510 | |
| 511 | rcu_read_lock(); |
| 512 | ppd = private2ppd(file); |
| 513 | |
| 514 | buff = kmalloc(count, GFP_KERNEL); |
| 515 | if (!buff) { |
| 516 | ret = -ENOMEM; |
| 517 | goto _return; |
| 518 | } |
| 519 | |
| 520 | i2c_addr = (*ppos >> 16) & 0xff; |
| 521 | offset = *ppos & 0xffff; |
| 522 | |
| 523 | total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count); |
| 524 | if (total_read < 0) { |
| 525 | ret = total_read; |
| 526 | goto _free; |
| 527 | } |
| 528 | |
| 529 | *ppos += total_read; |
| 530 | |
| 531 | ret = copy_to_user(buf, buff, total_read); |
| 532 | if (ret > 0) { |
| 533 | ret = -EFAULT; |
| 534 | goto _free; |
| 535 | } |
| 536 | |
| 537 | ret = total_read; |
| 538 | |
| 539 | _free: |
| 540 | kfree(buff); |
| 541 | _return: |
| 542 | rcu_read_unlock(); |
| 543 | return ret; |
| 544 | } |
| 545 | |
| 546 | /* Do an i2c read operation on chain for HFI 0. */ |
| 547 | static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf, |
| 548 | size_t count, loff_t *ppos) |
| 549 | { |
| 550 | return __i2c_debugfs_read(file, buf, count, ppos, 0); |
| 551 | } |
| 552 | |
| 553 | /* Do an i2c read operation on chain for HFI 1. */ |
| 554 | static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf, |
| 555 | size_t count, loff_t *ppos) |
| 556 | { |
| 557 | return __i2c_debugfs_read(file, buf, count, ppos, 1); |
| 558 | } |
| 559 | |
| 560 | /* Do a QSFP write operation on the i2c chain for the given HFI. */ |
| 561 | static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf, |
| 562 | size_t count, loff_t *ppos, u32 target) |
| 563 | { |
| 564 | struct hfi1_pportdata *ppd; |
| 565 | char *buff; |
| 566 | int ret; |
| 567 | int total_written; |
| 568 | |
| 569 | rcu_read_lock(); |
| 570 | if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */ |
| 571 | ret = -EINVAL; |
| 572 | goto _return; |
| 573 | } |
| 574 | |
| 575 | ppd = private2ppd(file); |
| 576 | |
| 577 | buff = kmalloc(count, GFP_KERNEL); |
| 578 | if (!buff) { |
| 579 | ret = -ENOMEM; |
| 580 | goto _return; |
| 581 | } |
| 582 | |
| 583 | ret = copy_from_user(buff, buf, count); |
| 584 | if (ret > 0) { |
| 585 | ret = -EFAULT; |
| 586 | goto _free; |
| 587 | } |
| 588 | |
| 589 | total_written = qsfp_write(ppd, target, *ppos, buff, count); |
| 590 | if (total_written < 0) { |
| 591 | ret = total_written; |
| 592 | goto _free; |
| 593 | } |
| 594 | |
| 595 | *ppos += total_written; |
| 596 | |
| 597 | ret = total_written; |
| 598 | |
| 599 | _free: |
| 600 | kfree(buff); |
| 601 | _return: |
| 602 | rcu_read_unlock(); |
| 603 | return ret; |
| 604 | } |
| 605 | |
| 606 | /* Do a QSFP write operation on i2c chain for HFI 0. */ |
| 607 | static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf, |
| 608 | size_t count, loff_t *ppos) |
| 609 | { |
| 610 | return __qsfp_debugfs_write(file, buf, count, ppos, 0); |
| 611 | } |
| 612 | |
| 613 | /* Do a QSFP write operation on i2c chain for HFI 1. */ |
| 614 | static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf, |
| 615 | size_t count, loff_t *ppos) |
| 616 | { |
| 617 | return __qsfp_debugfs_write(file, buf, count, ppos, 1); |
| 618 | } |
| 619 | |
| 620 | /* Do a QSFP read operation on the i2c chain for the given HFI. */ |
| 621 | static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf, |
| 622 | size_t count, loff_t *ppos, u32 target) |
| 623 | { |
| 624 | struct hfi1_pportdata *ppd; |
| 625 | char *buff; |
| 626 | int ret; |
| 627 | int total_read; |
| 628 | |
| 629 | rcu_read_lock(); |
| 630 | if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */ |
| 631 | ret = -EINVAL; |
| 632 | goto _return; |
| 633 | } |
| 634 | |
| 635 | ppd = private2ppd(file); |
| 636 | |
| 637 | buff = kmalloc(count, GFP_KERNEL); |
| 638 | if (!buff) { |
| 639 | ret = -ENOMEM; |
| 640 | goto _return; |
| 641 | } |
| 642 | |
| 643 | total_read = qsfp_read(ppd, target, *ppos, buff, count); |
| 644 | if (total_read < 0) { |
| 645 | ret = total_read; |
| 646 | goto _free; |
| 647 | } |
| 648 | |
| 649 | *ppos += total_read; |
| 650 | |
| 651 | ret = copy_to_user(buf, buff, total_read); |
| 652 | if (ret > 0) { |
| 653 | ret = -EFAULT; |
| 654 | goto _free; |
| 655 | } |
| 656 | |
| 657 | ret = total_read; |
| 658 | |
| 659 | _free: |
| 660 | kfree(buff); |
| 661 | _return: |
| 662 | rcu_read_unlock(); |
| 663 | return ret; |
| 664 | } |
| 665 | |
| 666 | /* Do a QSFP read operation on i2c chain for HFI 0. */ |
| 667 | static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf, |
| 668 | size_t count, loff_t *ppos) |
| 669 | { |
| 670 | return __qsfp_debugfs_read(file, buf, count, ppos, 0); |
| 671 | } |
| 672 | |
| 673 | /* Do a QSFP read operation on i2c chain for HFI 1. */ |
| 674 | static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf, |
| 675 | size_t count, loff_t *ppos) |
| 676 | { |
| 677 | return __qsfp_debugfs_read(file, buf, count, ppos, 1); |
| 678 | } |
| 679 | |
| 680 | #define DEBUGFS_OPS(nm, readroutine, writeroutine) \ |
| 681 | { \ |
| 682 | .name = nm, \ |
| 683 | .ops = { \ |
| 684 | .read = readroutine, \ |
| 685 | .write = writeroutine, \ |
| 686 | .llseek = generic_file_llseek, \ |
| 687 | }, \ |
| 688 | } |
| 689 | |
| 690 | static const struct counter_info cntr_ops[] = { |
| 691 | DEBUGFS_OPS("counter_names", dev_names_read, NULL), |
| 692 | DEBUGFS_OPS("counters", dev_counters_read, NULL), |
| 693 | DEBUGFS_OPS("portcounter_names", portnames_read, NULL), |
| 694 | }; |
| 695 | |
| 696 | static const struct counter_info port_cntr_ops[] = { |
| 697 | DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL), |
| 698 | DEBUGFS_OPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write), |
| 699 | DEBUGFS_OPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write), |
| 700 | DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL), |
| 701 | DEBUGFS_OPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write), |
| 702 | DEBUGFS_OPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write), |
| 703 | }; |
| 704 | |
| 705 | void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd) |
| 706 | { |
| 707 | char name[sizeof("port0counters") + 1]; |
| 708 | char link[10]; |
| 709 | struct hfi1_devdata *dd = dd_from_dev(ibd); |
| 710 | struct hfi1_pportdata *ppd; |
| 711 | int unit = dd->unit; |
| 712 | int i, j; |
| 713 | |
| 714 | if (!hfi1_dbg_root) |
| 715 | return; |
| 716 | snprintf(name, sizeof(name), "%s_%d", class_name(), unit); |
| 717 | snprintf(link, sizeof(link), "%d", unit); |
| 718 | ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root); |
| 719 | if (!ibd->hfi1_ibdev_dbg) { |
| 720 | pr_warn("create of %s failed\n", name); |
| 721 | return; |
| 722 | } |
| 723 | ibd->hfi1_ibdev_link = |
| 724 | debugfs_create_symlink(link, hfi1_dbg_root, name); |
| 725 | if (!ibd->hfi1_ibdev_link) { |
| 726 | pr_warn("create of %s symlink failed\n", name); |
| 727 | return; |
| 728 | } |
| 729 | DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd); |
| 730 | DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd); |
| 731 | DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd); |
| 732 | DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd); |
| 733 | /* dev counter files */ |
| 734 | for (i = 0; i < ARRAY_SIZE(cntr_ops); i++) |
| 735 | DEBUGFS_FILE_CREATE(cntr_ops[i].name, |
| 736 | ibd->hfi1_ibdev_dbg, |
| 737 | dd, |
| 738 | &cntr_ops[i].ops, S_IRUGO); |
| 739 | /* per port files */ |
| 740 | for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++) |
| 741 | for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) { |
| 742 | snprintf(name, |
| 743 | sizeof(name), |
| 744 | port_cntr_ops[i].name, |
| 745 | j + 1); |
| 746 | DEBUGFS_FILE_CREATE(name, |
| 747 | ibd->hfi1_ibdev_dbg, |
| 748 | ppd, |
| 749 | &port_cntr_ops[i].ops, |
| 750 | port_cntr_ops[i].ops.write == NULL ? |
| 751 | S_IRUGO : S_IRUGO|S_IWUSR); |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd) |
| 756 | { |
| 757 | if (!hfi1_dbg_root) |
| 758 | goto out; |
| 759 | debugfs_remove(ibd->hfi1_ibdev_link); |
| 760 | debugfs_remove_recursive(ibd->hfi1_ibdev_dbg); |
| 761 | out: |
| 762 | ibd->hfi1_ibdev_dbg = NULL; |
| 763 | synchronize_rcu(); |
| 764 | } |
| 765 | |
| 766 | /* |
| 767 | * driver stats field names, one line per stat, single string. Used by |
| 768 | * programs like hfistats to print the stats in a way which works for |
| 769 | * different versions of drivers, without changing program source. |
| 770 | * if hfi1_ib_stats changes, this needs to change. Names need to be |
| 771 | * 12 chars or less (w/o newline), for proper display by hfistats utility. |
| 772 | */ |
| 773 | static const char * const hfi1_statnames[] = { |
| 774 | /* must be element 0*/ |
| 775 | "KernIntr", |
| 776 | "ErrorIntr", |
| 777 | "Tx_Errs", |
| 778 | "Rcv_Errs", |
| 779 | "H/W_Errs", |
| 780 | "NoPIOBufs", |
| 781 | "CtxtsOpen", |
| 782 | "RcvLen_Errs", |
| 783 | "EgrBufFull", |
| 784 | "EgrHdrFull" |
| 785 | }; |
| 786 | |
| 787 | static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos) |
| 788 | __acquires(RCU) |
| 789 | { |
| 790 | rcu_read_lock(); |
| 791 | if (*pos >= ARRAY_SIZE(hfi1_statnames)) |
| 792 | return NULL; |
| 793 | return pos; |
| 794 | } |
| 795 | |
| 796 | static void *_driver_stats_names_seq_next( |
| 797 | struct seq_file *s, |
| 798 | void *v, |
| 799 | loff_t *pos) |
| 800 | { |
| 801 | ++*pos; |
| 802 | if (*pos >= ARRAY_SIZE(hfi1_statnames)) |
| 803 | return NULL; |
| 804 | return pos; |
| 805 | } |
| 806 | |
| 807 | static void _driver_stats_names_seq_stop(struct seq_file *s, void *v) |
| 808 | __releases(RCU) |
| 809 | { |
| 810 | rcu_read_unlock(); |
| 811 | } |
| 812 | |
| 813 | static int _driver_stats_names_seq_show(struct seq_file *s, void *v) |
| 814 | { |
| 815 | loff_t *spos = v; |
| 816 | |
| 817 | seq_printf(s, "%s\n", hfi1_statnames[*spos]); |
| 818 | return 0; |
| 819 | } |
| 820 | |
| 821 | DEBUGFS_SEQ_FILE_OPS(driver_stats_names); |
| 822 | DEBUGFS_SEQ_FILE_OPEN(driver_stats_names) |
| 823 | DEBUGFS_FILE_OPS(driver_stats_names); |
| 824 | |
| 825 | static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos) |
| 826 | __acquires(RCU) |
| 827 | { |
| 828 | rcu_read_lock(); |
| 829 | if (*pos >= ARRAY_SIZE(hfi1_statnames)) |
| 830 | return NULL; |
| 831 | return pos; |
| 832 | } |
| 833 | |
| 834 | static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 835 | { |
| 836 | ++*pos; |
| 837 | if (*pos >= ARRAY_SIZE(hfi1_statnames)) |
| 838 | return NULL; |
| 839 | return pos; |
| 840 | } |
| 841 | |
| 842 | static void _driver_stats_seq_stop(struct seq_file *s, void *v) |
| 843 | __releases(RCU) |
| 844 | { |
| 845 | rcu_read_unlock(); |
| 846 | } |
| 847 | |
| 848 | static u64 hfi1_sps_ints(void) |
| 849 | { |
| 850 | unsigned long flags; |
| 851 | struct hfi1_devdata *dd; |
| 852 | u64 sps_ints = 0; |
| 853 | |
| 854 | spin_lock_irqsave(&hfi1_devs_lock, flags); |
| 855 | list_for_each_entry(dd, &hfi1_dev_list, list) { |
| 856 | sps_ints += get_all_cpu_total(dd->int_counter); |
| 857 | } |
| 858 | spin_unlock_irqrestore(&hfi1_devs_lock, flags); |
| 859 | return sps_ints; |
| 860 | } |
| 861 | |
| 862 | static int _driver_stats_seq_show(struct seq_file *s, void *v) |
| 863 | { |
| 864 | loff_t *spos = v; |
| 865 | char *buffer; |
| 866 | u64 *stats = (u64 *)&hfi1_stats; |
| 867 | size_t sz = seq_get_buf(s, &buffer); |
| 868 | |
| 869 | if (sz < sizeof(u64)) |
| 870 | return SEQ_SKIP; |
| 871 | /* special case for interrupts */ |
| 872 | if (*spos == 0) |
| 873 | *(u64 *)buffer = hfi1_sps_ints(); |
| 874 | else |
| 875 | *(u64 *)buffer = stats[*spos]; |
| 876 | seq_commit(s, sizeof(u64)); |
| 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | DEBUGFS_SEQ_FILE_OPS(driver_stats); |
| 881 | DEBUGFS_SEQ_FILE_OPEN(driver_stats) |
| 882 | DEBUGFS_FILE_OPS(driver_stats); |
| 883 | |
| 884 | void hfi1_dbg_init(void) |
| 885 | { |
| 886 | hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL); |
| 887 | if (!hfi1_dbg_root) |
| 888 | pr_warn("init of debugfs failed\n"); |
| 889 | DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL); |
| 890 | DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL); |
| 891 | } |
| 892 | |
| 893 | void hfi1_dbg_exit(void) |
| 894 | { |
| 895 | debugfs_remove_recursive(hfi1_dbg_root); |
| 896 | hfi1_dbg_root = NULL; |
| 897 | } |
| 898 | |
| 899 | #endif |