1 #ifdef CONFIG_DEBUG_FS 2 /* 3 * Copyright(c) 2015, 2016 Intel Corporation. 4 * 5 * This file is provided under a dual BSD/GPLv2 license. When using or 6 * redistributing this file, you may do so under either license. 7 * 8 * GPL LICENSE SUMMARY 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of version 2 of the GNU General Public License as 12 * published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * BSD LICENSE 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 25 * - Redistributions of source code must retain the above copyright 26 * notice, this list of conditions and the following disclaimer. 27 * - Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in 29 * the documentation and/or other materials provided with the 30 * distribution. 31 * - Neither the name of Intel Corporation nor the names of its 32 * contributors may be used to endorse or promote products derived 33 * from this software without specific prior written permission. 34 * 35 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 38 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 39 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 45 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 46 * 47 */ 48 #include <linux/debugfs.h> 49 #include <linux/seq_file.h> 50 #include <linux/kernel.h> 51 #include <linux/export.h> 52 #include <linux/module.h> 53 54 #include "hfi.h" 55 #include "debugfs.h" 56 #include "device.h" 57 #include "qp.h" 58 #include "sdma.h" 59 60 static struct dentry *hfi1_dbg_root; 61 62 /* wrappers to enforce srcu in seq file */ 63 static ssize_t hfi1_seq_read( 64 struct file *file, 65 char __user *buf, 66 size_t size, 67 loff_t *ppos) 68 { 69 struct dentry *d = file->f_path.dentry; 70 int srcu_idx; 71 ssize_t r; 72 73 r = debugfs_use_file_start(d, &srcu_idx); 74 if (likely(!r)) 75 r = seq_read(file, buf, size, ppos); 76 debugfs_use_file_finish(srcu_idx); 77 return r; 78 } 79 80 static loff_t hfi1_seq_lseek( 81 struct file *file, 82 loff_t offset, 83 int whence) 84 { 85 struct dentry *d = file->f_path.dentry; 86 int srcu_idx; 87 loff_t r; 88 89 r = debugfs_use_file_start(d, &srcu_idx); 90 if (likely(!r)) 91 r = seq_lseek(file, offset, whence); 92 debugfs_use_file_finish(srcu_idx); 93 return r; 94 } 95 96 #define private2dd(file) (file_inode(file)->i_private) 97 #define private2ppd(file) (file_inode(file)->i_private) 98 99 #define DEBUGFS_SEQ_FILE_OPS(name) \ 100 static const struct seq_operations _##name##_seq_ops = { \ 101 .start = _##name##_seq_start, \ 102 .next = _##name##_seq_next, \ 103 .stop = _##name##_seq_stop, \ 104 .show = _##name##_seq_show \ 105 } 106 107 #define DEBUGFS_SEQ_FILE_OPEN(name) \ 108 static int _##name##_open(struct inode *inode, struct file *s) \ 109 { \ 110 struct seq_file *seq; \ 111 int ret; \ 112 ret = seq_open(s, &_##name##_seq_ops); \ 113 if (ret) \ 114 return ret; \ 115 seq = s->private_data; \ 116 seq->private = inode->i_private; \ 117 return 0; \ 118 } 119 120 #define DEBUGFS_FILE_OPS(name) \ 121 static const struct file_operations _##name##_file_ops = { \ 122 .owner = THIS_MODULE, \ 123 .open = _##name##_open, \ 124 .read = hfi1_seq_read, \ 125 .llseek = hfi1_seq_lseek, \ 126 .release = seq_release \ 127 } 128 129 #define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \ 130 do { \ 131 struct dentry *ent; \ 132 ent = debugfs_create_file(name, mode, parent, \ 133 data, ops); \ 134 if (!ent) \ 135 pr_warn("create of %s failed\n", name); \ 136 } while (0) 137 138 #define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \ 139 DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO) 140 141 static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos) 142 { 143 struct hfi1_opcode_stats_perctx *opstats; 144 145 if (*pos >= ARRAY_SIZE(opstats->stats)) 146 return NULL; 147 return pos; 148 } 149 150 static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) 151 { 152 struct hfi1_opcode_stats_perctx *opstats; 153 154 ++*pos; 155 if (*pos >= ARRAY_SIZE(opstats->stats)) 156 return NULL; 157 return pos; 158 } 159 160 static void _opcode_stats_seq_stop(struct seq_file *s, void *v) 161 { 162 } 163 164 static int _opcode_stats_seq_show(struct seq_file *s, void *v) 165 { 166 loff_t *spos = v; 167 loff_t i = *spos, j; 168 u64 n_packets = 0, n_bytes = 0; 169 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 170 struct hfi1_devdata *dd = dd_from_dev(ibd); 171 172 for (j = 0; j < dd->first_user_ctxt; j++) { 173 if (!dd->rcd[j]) 174 continue; 175 n_packets += dd->rcd[j]->opstats->stats[i].n_packets; 176 n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes; 177 } 178 if (!n_packets && !n_bytes) 179 return SEQ_SKIP; 180 seq_printf(s, "%02llx %llu/%llu\n", i, 181 (unsigned long long)n_packets, 182 (unsigned long long)n_bytes); 183 184 return 0; 185 } 186 187 DEBUGFS_SEQ_FILE_OPS(opcode_stats); 188 DEBUGFS_SEQ_FILE_OPEN(opcode_stats) 189 DEBUGFS_FILE_OPS(opcode_stats); 190 191 static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos) 192 { 193 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 194 struct hfi1_devdata *dd = dd_from_dev(ibd); 195 196 if (!*pos) 197 return SEQ_START_TOKEN; 198 if (*pos >= dd->first_user_ctxt) 199 return NULL; 200 return pos; 201 } 202 203 static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) 204 { 205 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 206 struct hfi1_devdata *dd = dd_from_dev(ibd); 207 208 if (v == SEQ_START_TOKEN) 209 return pos; 210 211 ++*pos; 212 if (*pos >= dd->first_user_ctxt) 213 return NULL; 214 return pos; 215 } 216 217 static void _ctx_stats_seq_stop(struct seq_file *s, void *v) 218 { 219 /* nothing allocated */ 220 } 221 222 static int _ctx_stats_seq_show(struct seq_file *s, void *v) 223 { 224 loff_t *spos; 225 loff_t i, j; 226 u64 n_packets = 0; 227 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 228 struct hfi1_devdata *dd = dd_from_dev(ibd); 229 230 if (v == SEQ_START_TOKEN) { 231 seq_puts(s, "Ctx:npkts\n"); 232 return 0; 233 } 234 235 spos = v; 236 i = *spos; 237 238 if (!dd->rcd[i]) 239 return SEQ_SKIP; 240 241 for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++) 242 n_packets += dd->rcd[i]->opstats->stats[j].n_packets; 243 244 if (!n_packets) 245 return SEQ_SKIP; 246 247 seq_printf(s, " %llu:%llu\n", i, n_packets); 248 return 0; 249 } 250 251 DEBUGFS_SEQ_FILE_OPS(ctx_stats); 252 DEBUGFS_SEQ_FILE_OPEN(ctx_stats) 253 DEBUGFS_FILE_OPS(ctx_stats); 254 255 static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos) 256 __acquires(RCU) 257 { 258 struct qp_iter *iter; 259 loff_t n = *pos; 260 261 iter = qp_iter_init(s->private); 262 263 /* stop calls rcu_read_unlock */ 264 rcu_read_lock(); 265 266 if (!iter) 267 return NULL; 268 269 do { 270 if (qp_iter_next(iter)) { 271 kfree(iter); 272 return NULL; 273 } 274 } while (n--); 275 276 return iter; 277 } 278 279 static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr, 280 loff_t *pos) 281 __must_hold(RCU) 282 { 283 struct qp_iter *iter = iter_ptr; 284 285 (*pos)++; 286 287 if (qp_iter_next(iter)) { 288 kfree(iter); 289 return NULL; 290 } 291 292 return iter; 293 } 294 295 static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr) 296 __releases(RCU) 297 { 298 rcu_read_unlock(); 299 } 300 301 static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr) 302 { 303 struct qp_iter *iter = iter_ptr; 304 305 if (!iter) 306 return 0; 307 308 qp_iter_print(s, iter); 309 310 return 0; 311 } 312 313 DEBUGFS_SEQ_FILE_OPS(qp_stats); 314 DEBUGFS_SEQ_FILE_OPEN(qp_stats) 315 DEBUGFS_FILE_OPS(qp_stats); 316 317 static void *_sdes_seq_start(struct seq_file *s, loff_t *pos) 318 { 319 struct hfi1_ibdev *ibd; 320 struct hfi1_devdata *dd; 321 322 ibd = (struct hfi1_ibdev *)s->private; 323 dd = dd_from_dev(ibd); 324 if (!dd->per_sdma || *pos >= dd->num_sdma) 325 return NULL; 326 return pos; 327 } 328 329 static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos) 330 { 331 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 332 struct hfi1_devdata *dd = dd_from_dev(ibd); 333 334 ++*pos; 335 if (!dd->per_sdma || *pos >= dd->num_sdma) 336 return NULL; 337 return pos; 338 } 339 340 static void _sdes_seq_stop(struct seq_file *s, void *v) 341 { 342 } 343 344 static int _sdes_seq_show(struct seq_file *s, void *v) 345 { 346 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 347 struct hfi1_devdata *dd = dd_from_dev(ibd); 348 loff_t *spos = v; 349 loff_t i = *spos; 350 351 sdma_seqfile_dump_sde(s, &dd->per_sdma[i]); 352 return 0; 353 } 354 355 DEBUGFS_SEQ_FILE_OPS(sdes); 356 DEBUGFS_SEQ_FILE_OPEN(sdes) 357 DEBUGFS_FILE_OPS(sdes); 358 359 /* read the per-device counters */ 360 static ssize_t dev_counters_read(struct file *file, char __user *buf, 361 size_t count, loff_t *ppos) 362 { 363 u64 *counters; 364 size_t avail; 365 struct hfi1_devdata *dd; 366 ssize_t rval; 367 368 dd = private2dd(file); 369 avail = hfi1_read_cntrs(dd, NULL, &counters); 370 rval = simple_read_from_buffer(buf, count, ppos, counters, avail); 371 return rval; 372 } 373 374 /* read the per-device counters */ 375 static ssize_t dev_names_read(struct file *file, char __user *buf, 376 size_t count, loff_t *ppos) 377 { 378 char *names; 379 size_t avail; 380 struct hfi1_devdata *dd; 381 ssize_t rval; 382 383 dd = private2dd(file); 384 avail = hfi1_read_cntrs(dd, &names, NULL); 385 rval = simple_read_from_buffer(buf, count, ppos, names, avail); 386 return rval; 387 } 388 389 struct counter_info { 390 char *name; 391 const struct file_operations ops; 392 }; 393 394 /* 395 * Could use file_inode(file)->i_ino to figure out which file, 396 * instead of separate routine for each, but for now, this works... 397 */ 398 399 /* read the per-port names (same for each port) */ 400 static ssize_t portnames_read(struct file *file, char __user *buf, 401 size_t count, loff_t *ppos) 402 { 403 char *names; 404 size_t avail; 405 struct hfi1_devdata *dd; 406 ssize_t rval; 407 408 dd = private2dd(file); 409 avail = hfi1_read_portcntrs(dd->pport, &names, NULL); 410 rval = simple_read_from_buffer(buf, count, ppos, names, avail); 411 return rval; 412 } 413 414 /* read the per-port counters */ 415 static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf, 416 size_t count, loff_t *ppos) 417 { 418 u64 *counters; 419 size_t avail; 420 struct hfi1_pportdata *ppd; 421 ssize_t rval; 422 423 ppd = private2ppd(file); 424 avail = hfi1_read_portcntrs(ppd, NULL, &counters); 425 rval = simple_read_from_buffer(buf, count, ppos, counters, avail); 426 return rval; 427 } 428 429 static void check_dyn_flag(u64 scratch0, char *p, int size, int *used, 430 int this_hfi, int hfi, u32 flag, const char *what) 431 { 432 u32 mask; 433 434 mask = flag << (hfi ? CR_DYN_SHIFT : 0); 435 if (scratch0 & mask) { 436 *used += scnprintf(p + *used, size - *used, 437 " 0x%08x - HFI%d %s in use, %s device\n", 438 mask, hfi, what, 439 this_hfi == hfi ? "this" : "other"); 440 } 441 } 442 443 static ssize_t asic_flags_read(struct file *file, char __user *buf, 444 size_t count, loff_t *ppos) 445 { 446 struct hfi1_pportdata *ppd; 447 struct hfi1_devdata *dd; 448 u64 scratch0; 449 char *tmp; 450 int ret = 0; 451 int size; 452 int used; 453 int i; 454 455 ppd = private2ppd(file); 456 dd = ppd->dd; 457 size = PAGE_SIZE; 458 used = 0; 459 tmp = kmalloc(size, GFP_KERNEL); 460 if (!tmp) 461 return -ENOMEM; 462 463 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH); 464 used += scnprintf(tmp + used, size - used, 465 "Resource flags: 0x%016llx\n", scratch0); 466 467 /* check permanent flag */ 468 if (scratch0 & CR_THERM_INIT) { 469 used += scnprintf(tmp + used, size - used, 470 " 0x%08x - thermal monitoring initialized\n", 471 (u32)CR_THERM_INIT); 472 } 473 474 /* check each dynamic flag on each HFI */ 475 for (i = 0; i < 2; i++) { 476 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 477 CR_SBUS, "SBus"); 478 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 479 CR_EPROM, "EPROM"); 480 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 481 CR_I2C1, "i2c chain 1"); 482 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 483 CR_I2C2, "i2c chain 2"); 484 } 485 used += scnprintf(tmp + used, size - used, "Write bits to clear\n"); 486 487 ret = simple_read_from_buffer(buf, count, ppos, tmp, used); 488 kfree(tmp); 489 return ret; 490 } 491 492 static ssize_t asic_flags_write(struct file *file, const char __user *buf, 493 size_t count, loff_t *ppos) 494 { 495 struct hfi1_pportdata *ppd; 496 struct hfi1_devdata *dd; 497 char *buff; 498 int ret; 499 unsigned long long value; 500 u64 scratch0; 501 u64 clear; 502 503 ppd = private2ppd(file); 504 dd = ppd->dd; 505 506 buff = kmalloc(count + 1, GFP_KERNEL); 507 if (!buff) 508 return -ENOMEM; 509 510 ret = copy_from_user(buff, buf, count); 511 if (ret > 0) { 512 ret = -EFAULT; 513 goto do_free; 514 } 515 516 /* zero terminate and read the expected integer */ 517 buff[count] = 0; 518 ret = kstrtoull(buff, 0, &value); 519 if (ret) 520 goto do_free; 521 clear = value; 522 523 /* obtain exclusive access */ 524 mutex_lock(&dd->asic_data->asic_resource_mutex); 525 acquire_hw_mutex(dd); 526 527 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH); 528 scratch0 &= ~clear; 529 write_csr(dd, ASIC_CFG_SCRATCH, scratch0); 530 /* force write to be visible to other HFI on another OS */ 531 (void)read_csr(dd, ASIC_CFG_SCRATCH); 532 533 release_hw_mutex(dd); 534 mutex_unlock(&dd->asic_data->asic_resource_mutex); 535 536 /* return the number of bytes written */ 537 ret = count; 538 539 do_free: 540 kfree(buff); 541 return ret; 542 } 543 544 /* 545 * read the per-port QSFP data for ppd 546 */ 547 static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf, 548 size_t count, loff_t *ppos) 549 { 550 struct hfi1_pportdata *ppd; 551 char *tmp; 552 int ret; 553 554 ppd = private2ppd(file); 555 tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); 556 if (!tmp) 557 return -ENOMEM; 558 559 ret = qsfp_dump(ppd, tmp, PAGE_SIZE); 560 if (ret > 0) 561 ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); 562 kfree(tmp); 563 return ret; 564 } 565 566 /* Do an i2c write operation on the chain for the given HFI. */ 567 static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf, 568 size_t count, loff_t *ppos, u32 target) 569 { 570 struct hfi1_pportdata *ppd; 571 char *buff; 572 int ret; 573 int i2c_addr; 574 int offset; 575 int total_written; 576 577 ppd = private2ppd(file); 578 579 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */ 580 i2c_addr = (*ppos >> 16) & 0xffff; 581 offset = *ppos & 0xffff; 582 583 /* explicitly reject invalid address 0 to catch cp and cat */ 584 if (i2c_addr == 0) 585 return -EINVAL; 586 587 buff = kmalloc(count, GFP_KERNEL); 588 if (!buff) 589 return -ENOMEM; 590 591 ret = copy_from_user(buff, buf, count); 592 if (ret > 0) { 593 ret = -EFAULT; 594 goto _free; 595 } 596 597 total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count); 598 if (total_written < 0) { 599 ret = total_written; 600 goto _free; 601 } 602 603 *ppos += total_written; 604 605 ret = total_written; 606 607 _free: 608 kfree(buff); 609 return ret; 610 } 611 612 /* Do an i2c write operation on chain for HFI 0. */ 613 static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf, 614 size_t count, loff_t *ppos) 615 { 616 return __i2c_debugfs_write(file, buf, count, ppos, 0); 617 } 618 619 /* Do an i2c write operation on chain for HFI 1. */ 620 static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf, 621 size_t count, loff_t *ppos) 622 { 623 return __i2c_debugfs_write(file, buf, count, ppos, 1); 624 } 625 626 /* Do an i2c read operation on the chain for the given HFI. */ 627 static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf, 628 size_t count, loff_t *ppos, u32 target) 629 { 630 struct hfi1_pportdata *ppd; 631 char *buff; 632 int ret; 633 int i2c_addr; 634 int offset; 635 int total_read; 636 637 ppd = private2ppd(file); 638 639 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */ 640 i2c_addr = (*ppos >> 16) & 0xffff; 641 offset = *ppos & 0xffff; 642 643 /* explicitly reject invalid address 0 to catch cp and cat */ 644 if (i2c_addr == 0) 645 return -EINVAL; 646 647 buff = kmalloc(count, GFP_KERNEL); 648 if (!buff) 649 return -ENOMEM; 650 651 total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count); 652 if (total_read < 0) { 653 ret = total_read; 654 goto _free; 655 } 656 657 *ppos += total_read; 658 659 ret = copy_to_user(buf, buff, total_read); 660 if (ret > 0) { 661 ret = -EFAULT; 662 goto _free; 663 } 664 665 ret = total_read; 666 667 _free: 668 kfree(buff); 669 return ret; 670 } 671 672 /* Do an i2c read operation on chain for HFI 0. */ 673 static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf, 674 size_t count, loff_t *ppos) 675 { 676 return __i2c_debugfs_read(file, buf, count, ppos, 0); 677 } 678 679 /* Do an i2c read operation on chain for HFI 1. */ 680 static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf, 681 size_t count, loff_t *ppos) 682 { 683 return __i2c_debugfs_read(file, buf, count, ppos, 1); 684 } 685 686 /* Do a QSFP write operation on the i2c chain for the given HFI. */ 687 static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf, 688 size_t count, loff_t *ppos, u32 target) 689 { 690 struct hfi1_pportdata *ppd; 691 char *buff; 692 int ret; 693 int total_written; 694 695 if (*ppos + count > QSFP_PAGESIZE * 4) /* base page + page00-page03 */ 696 return -EINVAL; 697 698 ppd = private2ppd(file); 699 700 buff = kmalloc(count, GFP_KERNEL); 701 if (!buff) 702 return -ENOMEM; 703 704 ret = copy_from_user(buff, buf, count); 705 if (ret > 0) { 706 ret = -EFAULT; 707 goto _free; 708 } 709 total_written = qsfp_write(ppd, target, *ppos, buff, count); 710 if (total_written < 0) { 711 ret = total_written; 712 goto _free; 713 } 714 715 *ppos += total_written; 716 717 ret = total_written; 718 719 _free: 720 kfree(buff); 721 return ret; 722 } 723 724 /* Do a QSFP write operation on i2c chain for HFI 0. */ 725 static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf, 726 size_t count, loff_t *ppos) 727 { 728 return __qsfp_debugfs_write(file, buf, count, ppos, 0); 729 } 730 731 /* Do a QSFP write operation on i2c chain for HFI 1. */ 732 static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf, 733 size_t count, loff_t *ppos) 734 { 735 return __qsfp_debugfs_write(file, buf, count, ppos, 1); 736 } 737 738 /* Do a QSFP read operation on the i2c chain for the given HFI. */ 739 static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf, 740 size_t count, loff_t *ppos, u32 target) 741 { 742 struct hfi1_pportdata *ppd; 743 char *buff; 744 int ret; 745 int total_read; 746 747 if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */ 748 ret = -EINVAL; 749 goto _return; 750 } 751 752 ppd = private2ppd(file); 753 754 buff = kmalloc(count, GFP_KERNEL); 755 if (!buff) { 756 ret = -ENOMEM; 757 goto _return; 758 } 759 760 total_read = qsfp_read(ppd, target, *ppos, buff, count); 761 if (total_read < 0) { 762 ret = total_read; 763 goto _free; 764 } 765 766 *ppos += total_read; 767 768 ret = copy_to_user(buf, buff, total_read); 769 if (ret > 0) { 770 ret = -EFAULT; 771 goto _free; 772 } 773 774 ret = total_read; 775 776 _free: 777 kfree(buff); 778 _return: 779 return ret; 780 } 781 782 /* Do a QSFP read operation on i2c chain for HFI 0. */ 783 static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf, 784 size_t count, loff_t *ppos) 785 { 786 return __qsfp_debugfs_read(file, buf, count, ppos, 0); 787 } 788 789 /* Do a QSFP read operation on i2c chain for HFI 1. */ 790 static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf, 791 size_t count, loff_t *ppos) 792 { 793 return __qsfp_debugfs_read(file, buf, count, ppos, 1); 794 } 795 796 static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target) 797 { 798 struct hfi1_pportdata *ppd; 799 int ret; 800 801 if (!try_module_get(THIS_MODULE)) 802 return -ENODEV; 803 804 ppd = private2ppd(fp); 805 806 ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0); 807 if (ret) /* failed - release the module */ 808 module_put(THIS_MODULE); 809 810 return ret; 811 } 812 813 static int i2c1_debugfs_open(struct inode *in, struct file *fp) 814 { 815 return __i2c_debugfs_open(in, fp, 0); 816 } 817 818 static int i2c2_debugfs_open(struct inode *in, struct file *fp) 819 { 820 return __i2c_debugfs_open(in, fp, 1); 821 } 822 823 static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target) 824 { 825 struct hfi1_pportdata *ppd; 826 827 ppd = private2ppd(fp); 828 829 release_chip_resource(ppd->dd, i2c_target(target)); 830 module_put(THIS_MODULE); 831 832 return 0; 833 } 834 835 static int i2c1_debugfs_release(struct inode *in, struct file *fp) 836 { 837 return __i2c_debugfs_release(in, fp, 0); 838 } 839 840 static int i2c2_debugfs_release(struct inode *in, struct file *fp) 841 { 842 return __i2c_debugfs_release(in, fp, 1); 843 } 844 845 static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target) 846 { 847 struct hfi1_pportdata *ppd; 848 int ret; 849 850 if (!try_module_get(THIS_MODULE)) 851 return -ENODEV; 852 853 ppd = private2ppd(fp); 854 855 ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0); 856 if (ret) /* failed - release the module */ 857 module_put(THIS_MODULE); 858 859 return ret; 860 } 861 862 static int qsfp1_debugfs_open(struct inode *in, struct file *fp) 863 { 864 return __qsfp_debugfs_open(in, fp, 0); 865 } 866 867 static int qsfp2_debugfs_open(struct inode *in, struct file *fp) 868 { 869 return __qsfp_debugfs_open(in, fp, 1); 870 } 871 872 static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target) 873 { 874 struct hfi1_pportdata *ppd; 875 876 ppd = private2ppd(fp); 877 878 release_chip_resource(ppd->dd, i2c_target(target)); 879 module_put(THIS_MODULE); 880 881 return 0; 882 } 883 884 static int qsfp1_debugfs_release(struct inode *in, struct file *fp) 885 { 886 return __qsfp_debugfs_release(in, fp, 0); 887 } 888 889 static int qsfp2_debugfs_release(struct inode *in, struct file *fp) 890 { 891 return __qsfp_debugfs_release(in, fp, 1); 892 } 893 894 #define DEBUGFS_OPS(nm, readroutine, writeroutine) \ 895 { \ 896 .name = nm, \ 897 .ops = { \ 898 .read = readroutine, \ 899 .write = writeroutine, \ 900 .llseek = generic_file_llseek, \ 901 }, \ 902 } 903 904 #define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \ 905 { \ 906 .name = nm, \ 907 .ops = { \ 908 .read = readf, \ 909 .write = writef, \ 910 .llseek = generic_file_llseek, \ 911 .open = openf, \ 912 .release = releasef \ 913 }, \ 914 } 915 916 static const struct counter_info cntr_ops[] = { 917 DEBUGFS_OPS("counter_names", dev_names_read, NULL), 918 DEBUGFS_OPS("counters", dev_counters_read, NULL), 919 DEBUGFS_OPS("portcounter_names", portnames_read, NULL), 920 }; 921 922 static const struct counter_info port_cntr_ops[] = { 923 DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL), 924 DEBUGFS_XOPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write, 925 i2c1_debugfs_open, i2c1_debugfs_release), 926 DEBUGFS_XOPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write, 927 i2c2_debugfs_open, i2c2_debugfs_release), 928 DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL), 929 DEBUGFS_XOPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write, 930 qsfp1_debugfs_open, qsfp1_debugfs_release), 931 DEBUGFS_XOPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write, 932 qsfp2_debugfs_open, qsfp2_debugfs_release), 933 DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write), 934 }; 935 936 static void *_sdma_cpu_list_seq_start(struct seq_file *s, loff_t *pos) 937 { 938 if (*pos >= num_online_cpus()) 939 return NULL; 940 941 return pos; 942 } 943 944 static void *_sdma_cpu_list_seq_next(struct seq_file *s, void *v, loff_t *pos) 945 { 946 ++*pos; 947 if (*pos >= num_online_cpus()) 948 return NULL; 949 950 return pos; 951 } 952 953 static void _sdma_cpu_list_seq_stop(struct seq_file *s, void *v) 954 { 955 /* nothing allocated */ 956 } 957 958 static int _sdma_cpu_list_seq_show(struct seq_file *s, void *v) 959 { 960 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 961 struct hfi1_devdata *dd = dd_from_dev(ibd); 962 loff_t *spos = v; 963 loff_t i = *spos; 964 965 sdma_seqfile_dump_cpu_list(s, dd, (unsigned long)i); 966 return 0; 967 } 968 969 DEBUGFS_SEQ_FILE_OPS(sdma_cpu_list); 970 DEBUGFS_SEQ_FILE_OPEN(sdma_cpu_list) 971 DEBUGFS_FILE_OPS(sdma_cpu_list); 972 973 void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd) 974 { 975 char name[sizeof("port0counters") + 1]; 976 char link[10]; 977 struct hfi1_devdata *dd = dd_from_dev(ibd); 978 struct hfi1_pportdata *ppd; 979 int unit = dd->unit; 980 int i, j; 981 982 if (!hfi1_dbg_root) 983 return; 984 snprintf(name, sizeof(name), "%s_%d", class_name(), unit); 985 snprintf(link, sizeof(link), "%d", unit); 986 ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root); 987 if (!ibd->hfi1_ibdev_dbg) { 988 pr_warn("create of %s failed\n", name); 989 return; 990 } 991 ibd->hfi1_ibdev_link = 992 debugfs_create_symlink(link, hfi1_dbg_root, name); 993 if (!ibd->hfi1_ibdev_link) { 994 pr_warn("create of %s symlink failed\n", name); 995 return; 996 } 997 DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd); 998 DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd); 999 DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd); 1000 DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd); 1001 DEBUGFS_SEQ_FILE_CREATE(sdma_cpu_list, ibd->hfi1_ibdev_dbg, ibd); 1002 /* dev counter files */ 1003 for (i = 0; i < ARRAY_SIZE(cntr_ops); i++) 1004 DEBUGFS_FILE_CREATE(cntr_ops[i].name, 1005 ibd->hfi1_ibdev_dbg, 1006 dd, 1007 &cntr_ops[i].ops, S_IRUGO); 1008 /* per port files */ 1009 for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++) 1010 for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) { 1011 snprintf(name, 1012 sizeof(name), 1013 port_cntr_ops[i].name, 1014 j + 1); 1015 DEBUGFS_FILE_CREATE(name, 1016 ibd->hfi1_ibdev_dbg, 1017 ppd, 1018 &port_cntr_ops[i].ops, 1019 !port_cntr_ops[i].ops.write ? 1020 S_IRUGO : S_IRUGO | S_IWUSR); 1021 } 1022 } 1023 1024 void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd) 1025 { 1026 if (!hfi1_dbg_root) 1027 goto out; 1028 debugfs_remove(ibd->hfi1_ibdev_link); 1029 debugfs_remove_recursive(ibd->hfi1_ibdev_dbg); 1030 out: 1031 ibd->hfi1_ibdev_dbg = NULL; 1032 } 1033 1034 /* 1035 * driver stats field names, one line per stat, single string. Used by 1036 * programs like hfistats to print the stats in a way which works for 1037 * different versions of drivers, without changing program source. 1038 * if hfi1_ib_stats changes, this needs to change. Names need to be 1039 * 12 chars or less (w/o newline), for proper display by hfistats utility. 1040 */ 1041 static const char * const hfi1_statnames[] = { 1042 /* must be element 0*/ 1043 "KernIntr", 1044 "ErrorIntr", 1045 "Tx_Errs", 1046 "Rcv_Errs", 1047 "H/W_Errs", 1048 "NoPIOBufs", 1049 "CtxtsOpen", 1050 "RcvLen_Errs", 1051 "EgrBufFull", 1052 "EgrHdrFull" 1053 }; 1054 1055 static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos) 1056 { 1057 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1058 return NULL; 1059 return pos; 1060 } 1061 1062 static void *_driver_stats_names_seq_next( 1063 struct seq_file *s, 1064 void *v, 1065 loff_t *pos) 1066 { 1067 ++*pos; 1068 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1069 return NULL; 1070 return pos; 1071 } 1072 1073 static void _driver_stats_names_seq_stop(struct seq_file *s, void *v) 1074 { 1075 } 1076 1077 static int _driver_stats_names_seq_show(struct seq_file *s, void *v) 1078 { 1079 loff_t *spos = v; 1080 1081 seq_printf(s, "%s\n", hfi1_statnames[*spos]); 1082 return 0; 1083 } 1084 1085 DEBUGFS_SEQ_FILE_OPS(driver_stats_names); 1086 DEBUGFS_SEQ_FILE_OPEN(driver_stats_names) 1087 DEBUGFS_FILE_OPS(driver_stats_names); 1088 1089 static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos) 1090 { 1091 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1092 return NULL; 1093 return pos; 1094 } 1095 1096 static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) 1097 { 1098 ++*pos; 1099 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1100 return NULL; 1101 return pos; 1102 } 1103 1104 static void _driver_stats_seq_stop(struct seq_file *s, void *v) 1105 { 1106 } 1107 1108 static u64 hfi1_sps_ints(void) 1109 { 1110 unsigned long flags; 1111 struct hfi1_devdata *dd; 1112 u64 sps_ints = 0; 1113 1114 spin_lock_irqsave(&hfi1_devs_lock, flags); 1115 list_for_each_entry(dd, &hfi1_dev_list, list) { 1116 sps_ints += get_all_cpu_total(dd->int_counter); 1117 } 1118 spin_unlock_irqrestore(&hfi1_devs_lock, flags); 1119 return sps_ints; 1120 } 1121 1122 static int _driver_stats_seq_show(struct seq_file *s, void *v) 1123 { 1124 loff_t *spos = v; 1125 char *buffer; 1126 u64 *stats = (u64 *)&hfi1_stats; 1127 size_t sz = seq_get_buf(s, &buffer); 1128 1129 if (sz < sizeof(u64)) 1130 return SEQ_SKIP; 1131 /* special case for interrupts */ 1132 if (*spos == 0) 1133 *(u64 *)buffer = hfi1_sps_ints(); 1134 else 1135 *(u64 *)buffer = stats[*spos]; 1136 seq_commit(s, sizeof(u64)); 1137 return 0; 1138 } 1139 1140 DEBUGFS_SEQ_FILE_OPS(driver_stats); 1141 DEBUGFS_SEQ_FILE_OPEN(driver_stats) 1142 DEBUGFS_FILE_OPS(driver_stats); 1143 1144 void hfi1_dbg_init(void) 1145 { 1146 hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL); 1147 if (!hfi1_dbg_root) 1148 pr_warn("init of debugfs failed\n"); 1149 DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL); 1150 DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL); 1151 } 1152 1153 void hfi1_dbg_exit(void) 1154 { 1155 debugfs_remove_recursive(hfi1_dbg_root); 1156 hfi1_dbg_root = NULL; 1157 } 1158 1159 #endif 1160