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 #include <linux/string.h> 54 55 #include "hfi.h" 56 #include "debugfs.h" 57 #include "device.h" 58 #include "qp.h" 59 #include "sdma.h" 60 61 static struct dentry *hfi1_dbg_root; 62 63 /* wrappers to enforce srcu in seq file */ 64 static ssize_t hfi1_seq_read( 65 struct file *file, 66 char __user *buf, 67 size_t size, 68 loff_t *ppos) 69 { 70 struct dentry *d = file->f_path.dentry; 71 int srcu_idx; 72 ssize_t r; 73 74 r = debugfs_use_file_start(d, &srcu_idx); 75 if (likely(!r)) 76 r = seq_read(file, buf, size, ppos); 77 debugfs_use_file_finish(srcu_idx); 78 return r; 79 } 80 81 static loff_t hfi1_seq_lseek( 82 struct file *file, 83 loff_t offset, 84 int whence) 85 { 86 struct dentry *d = file->f_path.dentry; 87 int srcu_idx; 88 loff_t r; 89 90 r = debugfs_use_file_start(d, &srcu_idx); 91 if (likely(!r)) 92 r = seq_lseek(file, offset, whence); 93 debugfs_use_file_finish(srcu_idx); 94 return r; 95 } 96 97 #define private2dd(file) (file_inode(file)->i_private) 98 #define private2ppd(file) (file_inode(file)->i_private) 99 100 #define DEBUGFS_SEQ_FILE_OPS(name) \ 101 static const struct seq_operations _##name##_seq_ops = { \ 102 .start = _##name##_seq_start, \ 103 .next = _##name##_seq_next, \ 104 .stop = _##name##_seq_stop, \ 105 .show = _##name##_seq_show \ 106 } 107 108 #define DEBUGFS_SEQ_FILE_OPEN(name) \ 109 static int _##name##_open(struct inode *inode, struct file *s) \ 110 { \ 111 struct seq_file *seq; \ 112 int ret; \ 113 ret = seq_open(s, &_##name##_seq_ops); \ 114 if (ret) \ 115 return ret; \ 116 seq = s->private_data; \ 117 seq->private = inode->i_private; \ 118 return 0; \ 119 } 120 121 #define DEBUGFS_FILE_OPS(name) \ 122 static const struct file_operations _##name##_file_ops = { \ 123 .owner = THIS_MODULE, \ 124 .open = _##name##_open, \ 125 .read = hfi1_seq_read, \ 126 .llseek = hfi1_seq_lseek, \ 127 .release = seq_release \ 128 } 129 130 #define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \ 131 do { \ 132 struct dentry *ent; \ 133 ent = debugfs_create_file(name, mode, parent, \ 134 data, ops); \ 135 if (!ent) \ 136 pr_warn("create of %s failed\n", name); \ 137 } while (0) 138 139 #define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \ 140 DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO) 141 142 static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos) 143 { 144 struct hfi1_opcode_stats_perctx *opstats; 145 146 if (*pos >= ARRAY_SIZE(opstats->stats)) 147 return NULL; 148 return pos; 149 } 150 151 static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) 152 { 153 struct hfi1_opcode_stats_perctx *opstats; 154 155 ++*pos; 156 if (*pos >= ARRAY_SIZE(opstats->stats)) 157 return NULL; 158 return pos; 159 } 160 161 static void _opcode_stats_seq_stop(struct seq_file *s, void *v) 162 { 163 } 164 165 static int _opcode_stats_seq_show(struct seq_file *s, void *v) 166 { 167 loff_t *spos = v; 168 loff_t i = *spos, j; 169 u64 n_packets = 0, n_bytes = 0; 170 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 171 struct hfi1_devdata *dd = dd_from_dev(ibd); 172 173 for (j = 0; j < dd->first_user_ctxt; j++) { 174 if (!dd->rcd[j]) 175 continue; 176 n_packets += dd->rcd[j]->opstats->stats[i].n_packets; 177 n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes; 178 } 179 if (!n_packets && !n_bytes) 180 return SEQ_SKIP; 181 seq_printf(s, "%02llx %llu/%llu\n", i, 182 (unsigned long long)n_packets, 183 (unsigned long long)n_bytes); 184 185 return 0; 186 } 187 188 DEBUGFS_SEQ_FILE_OPS(opcode_stats); 189 DEBUGFS_SEQ_FILE_OPEN(opcode_stats) 190 DEBUGFS_FILE_OPS(opcode_stats); 191 192 static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos) 193 { 194 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 195 struct hfi1_devdata *dd = dd_from_dev(ibd); 196 197 if (!*pos) 198 return SEQ_START_TOKEN; 199 if (*pos >= dd->first_user_ctxt) 200 return NULL; 201 return pos; 202 } 203 204 static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) 205 { 206 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 207 struct hfi1_devdata *dd = dd_from_dev(ibd); 208 209 if (v == SEQ_START_TOKEN) 210 return pos; 211 212 ++*pos; 213 if (*pos >= dd->first_user_ctxt) 214 return NULL; 215 return pos; 216 } 217 218 static void _ctx_stats_seq_stop(struct seq_file *s, void *v) 219 { 220 /* nothing allocated */ 221 } 222 223 static int _ctx_stats_seq_show(struct seq_file *s, void *v) 224 { 225 loff_t *spos; 226 loff_t i, j; 227 u64 n_packets = 0; 228 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 229 struct hfi1_devdata *dd = dd_from_dev(ibd); 230 231 if (v == SEQ_START_TOKEN) { 232 seq_puts(s, "Ctx:npkts\n"); 233 return 0; 234 } 235 236 spos = v; 237 i = *spos; 238 239 if (!dd->rcd[i]) 240 return SEQ_SKIP; 241 242 for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++) 243 n_packets += dd->rcd[i]->opstats->stats[j].n_packets; 244 245 if (!n_packets) 246 return SEQ_SKIP; 247 248 seq_printf(s, " %llu:%llu\n", i, n_packets); 249 return 0; 250 } 251 252 DEBUGFS_SEQ_FILE_OPS(ctx_stats); 253 DEBUGFS_SEQ_FILE_OPEN(ctx_stats) 254 DEBUGFS_FILE_OPS(ctx_stats); 255 256 static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos) 257 __acquires(RCU) 258 { 259 struct qp_iter *iter; 260 loff_t n = *pos; 261 262 iter = qp_iter_init(s->private); 263 264 /* stop calls rcu_read_unlock */ 265 rcu_read_lock(); 266 267 if (!iter) 268 return NULL; 269 270 do { 271 if (qp_iter_next(iter)) { 272 kfree(iter); 273 return NULL; 274 } 275 } while (n--); 276 277 return iter; 278 } 279 280 static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr, 281 loff_t *pos) 282 __must_hold(RCU) 283 { 284 struct qp_iter *iter = iter_ptr; 285 286 (*pos)++; 287 288 if (qp_iter_next(iter)) { 289 kfree(iter); 290 return NULL; 291 } 292 293 return iter; 294 } 295 296 static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr) 297 __releases(RCU) 298 { 299 rcu_read_unlock(); 300 } 301 302 static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr) 303 { 304 struct qp_iter *iter = iter_ptr; 305 306 if (!iter) 307 return 0; 308 309 qp_iter_print(s, iter); 310 311 return 0; 312 } 313 314 DEBUGFS_SEQ_FILE_OPS(qp_stats); 315 DEBUGFS_SEQ_FILE_OPEN(qp_stats) 316 DEBUGFS_FILE_OPS(qp_stats); 317 318 static void *_sdes_seq_start(struct seq_file *s, loff_t *pos) 319 { 320 struct hfi1_ibdev *ibd; 321 struct hfi1_devdata *dd; 322 323 ibd = (struct hfi1_ibdev *)s->private; 324 dd = dd_from_dev(ibd); 325 if (!dd->per_sdma || *pos >= dd->num_sdma) 326 return NULL; 327 return pos; 328 } 329 330 static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos) 331 { 332 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 333 struct hfi1_devdata *dd = dd_from_dev(ibd); 334 335 ++*pos; 336 if (!dd->per_sdma || *pos >= dd->num_sdma) 337 return NULL; 338 return pos; 339 } 340 341 static void _sdes_seq_stop(struct seq_file *s, void *v) 342 { 343 } 344 345 static int _sdes_seq_show(struct seq_file *s, void *v) 346 { 347 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 348 struct hfi1_devdata *dd = dd_from_dev(ibd); 349 loff_t *spos = v; 350 loff_t i = *spos; 351 352 sdma_seqfile_dump_sde(s, &dd->per_sdma[i]); 353 return 0; 354 } 355 356 DEBUGFS_SEQ_FILE_OPS(sdes); 357 DEBUGFS_SEQ_FILE_OPEN(sdes) 358 DEBUGFS_FILE_OPS(sdes); 359 360 /* read the per-device counters */ 361 static ssize_t dev_counters_read(struct file *file, char __user *buf, 362 size_t count, loff_t *ppos) 363 { 364 u64 *counters; 365 size_t avail; 366 struct hfi1_devdata *dd; 367 ssize_t rval; 368 369 dd = private2dd(file); 370 avail = hfi1_read_cntrs(dd, NULL, &counters); 371 rval = simple_read_from_buffer(buf, count, ppos, counters, avail); 372 return rval; 373 } 374 375 /* read the per-device counters */ 376 static ssize_t dev_names_read(struct file *file, char __user *buf, 377 size_t count, loff_t *ppos) 378 { 379 char *names; 380 size_t avail; 381 struct hfi1_devdata *dd; 382 ssize_t rval; 383 384 dd = private2dd(file); 385 avail = hfi1_read_cntrs(dd, &names, NULL); 386 rval = simple_read_from_buffer(buf, count, ppos, names, avail); 387 return rval; 388 } 389 390 struct counter_info { 391 char *name; 392 const struct file_operations ops; 393 }; 394 395 /* 396 * Could use file_inode(file)->i_ino to figure out which file, 397 * instead of separate routine for each, but for now, this works... 398 */ 399 400 /* read the per-port names (same for each port) */ 401 static ssize_t portnames_read(struct file *file, char __user *buf, 402 size_t count, loff_t *ppos) 403 { 404 char *names; 405 size_t avail; 406 struct hfi1_devdata *dd; 407 ssize_t rval; 408 409 dd = private2dd(file); 410 avail = hfi1_read_portcntrs(dd->pport, &names, NULL); 411 rval = simple_read_from_buffer(buf, count, ppos, names, avail); 412 return rval; 413 } 414 415 /* read the per-port counters */ 416 static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf, 417 size_t count, loff_t *ppos) 418 { 419 u64 *counters; 420 size_t avail; 421 struct hfi1_pportdata *ppd; 422 ssize_t rval; 423 424 ppd = private2ppd(file); 425 avail = hfi1_read_portcntrs(ppd, NULL, &counters); 426 rval = simple_read_from_buffer(buf, count, ppos, counters, avail); 427 return rval; 428 } 429 430 static void check_dyn_flag(u64 scratch0, char *p, int size, int *used, 431 int this_hfi, int hfi, u32 flag, const char *what) 432 { 433 u32 mask; 434 435 mask = flag << (hfi ? CR_DYN_SHIFT : 0); 436 if (scratch0 & mask) { 437 *used += scnprintf(p + *used, size - *used, 438 " 0x%08x - HFI%d %s in use, %s device\n", 439 mask, hfi, what, 440 this_hfi == hfi ? "this" : "other"); 441 } 442 } 443 444 static ssize_t asic_flags_read(struct file *file, char __user *buf, 445 size_t count, loff_t *ppos) 446 { 447 struct hfi1_pportdata *ppd; 448 struct hfi1_devdata *dd; 449 u64 scratch0; 450 char *tmp; 451 int ret = 0; 452 int size; 453 int used; 454 int i; 455 456 ppd = private2ppd(file); 457 dd = ppd->dd; 458 size = PAGE_SIZE; 459 used = 0; 460 tmp = kmalloc(size, GFP_KERNEL); 461 if (!tmp) 462 return -ENOMEM; 463 464 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH); 465 used += scnprintf(tmp + used, size - used, 466 "Resource flags: 0x%016llx\n", scratch0); 467 468 /* check permanent flag */ 469 if (scratch0 & CR_THERM_INIT) { 470 used += scnprintf(tmp + used, size - used, 471 " 0x%08x - thermal monitoring initialized\n", 472 (u32)CR_THERM_INIT); 473 } 474 475 /* check each dynamic flag on each HFI */ 476 for (i = 0; i < 2; i++) { 477 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 478 CR_SBUS, "SBus"); 479 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 480 CR_EPROM, "EPROM"); 481 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 482 CR_I2C1, "i2c chain 1"); 483 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, 484 CR_I2C2, "i2c chain 2"); 485 } 486 used += scnprintf(tmp + used, size - used, "Write bits to clear\n"); 487 488 ret = simple_read_from_buffer(buf, count, ppos, tmp, used); 489 kfree(tmp); 490 return ret; 491 } 492 493 static ssize_t asic_flags_write(struct file *file, const char __user *buf, 494 size_t count, loff_t *ppos) 495 { 496 struct hfi1_pportdata *ppd; 497 struct hfi1_devdata *dd; 498 char *buff; 499 int ret; 500 unsigned long long value; 501 u64 scratch0; 502 u64 clear; 503 504 ppd = private2ppd(file); 505 dd = ppd->dd; 506 507 /* zero terminate and read the expected integer */ 508 buff = memdup_user_nul(buf, count); 509 if (IS_ERR(buff)) 510 return PTR_ERR(buff); 511 512 ret = kstrtoull(buff, 0, &value); 513 if (ret) 514 goto do_free; 515 clear = value; 516 517 /* obtain exclusive access */ 518 mutex_lock(&dd->asic_data->asic_resource_mutex); 519 acquire_hw_mutex(dd); 520 521 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH); 522 scratch0 &= ~clear; 523 write_csr(dd, ASIC_CFG_SCRATCH, scratch0); 524 /* force write to be visible to other HFI on another OS */ 525 (void)read_csr(dd, ASIC_CFG_SCRATCH); 526 527 release_hw_mutex(dd); 528 mutex_unlock(&dd->asic_data->asic_resource_mutex); 529 530 /* return the number of bytes written */ 531 ret = count; 532 533 do_free: 534 kfree(buff); 535 return ret; 536 } 537 538 /* read the dc8051 memory */ 539 static ssize_t dc8051_memory_read(struct file *file, char __user *buf, 540 size_t count, loff_t *ppos) 541 { 542 struct hfi1_pportdata *ppd = private2ppd(file); 543 ssize_t rval; 544 void *tmp; 545 loff_t start, end; 546 547 /* the checks below expect the position to be positive */ 548 if (*ppos < 0) 549 return -EINVAL; 550 551 tmp = kzalloc(DC8051_DATA_MEM_SIZE, GFP_KERNEL); 552 if (!tmp) 553 return -ENOMEM; 554 555 /* 556 * Fill in the requested portion of the temporary buffer from the 557 * 8051 memory. The 8051 memory read is done in terms of 8 bytes. 558 * Adjust start and end to fit. Skip reading anything if out of 559 * range. 560 */ 561 start = *ppos & ~0x7; /* round down */ 562 if (start < DC8051_DATA_MEM_SIZE) { 563 end = (*ppos + count + 7) & ~0x7; /* round up */ 564 if (end > DC8051_DATA_MEM_SIZE) 565 end = DC8051_DATA_MEM_SIZE; 566 rval = read_8051_data(ppd->dd, start, end - start, 567 (u64 *)(tmp + start)); 568 if (rval) 569 goto done; 570 } 571 572 rval = simple_read_from_buffer(buf, count, ppos, tmp, 573 DC8051_DATA_MEM_SIZE); 574 done: 575 kfree(tmp); 576 return rval; 577 } 578 579 static ssize_t debugfs_lcb_read(struct file *file, char __user *buf, 580 size_t count, loff_t *ppos) 581 { 582 struct hfi1_pportdata *ppd = private2ppd(file); 583 struct hfi1_devdata *dd = ppd->dd; 584 unsigned long total, csr_off; 585 u64 data; 586 587 if (*ppos < 0) 588 return -EINVAL; 589 /* only read 8 byte quantities */ 590 if ((count % 8) != 0) 591 return -EINVAL; 592 /* offset must be 8-byte aligned */ 593 if ((*ppos % 8) != 0) 594 return -EINVAL; 595 /* do nothing if out of range or zero count */ 596 if (*ppos >= (LCB_END - LCB_START) || !count) 597 return 0; 598 /* reduce count if needed */ 599 if (*ppos + count > LCB_END - LCB_START) 600 count = (LCB_END - LCB_START) - *ppos; 601 602 csr_off = LCB_START + *ppos; 603 for (total = 0; total < count; total += 8, csr_off += 8) { 604 if (read_lcb_csr(dd, csr_off, (u64 *)&data)) 605 break; /* failed */ 606 if (put_user(data, (unsigned long __user *)(buf + total))) 607 break; 608 } 609 *ppos += total; 610 return total; 611 } 612 613 static ssize_t debugfs_lcb_write(struct file *file, const char __user *buf, 614 size_t count, loff_t *ppos) 615 { 616 struct hfi1_pportdata *ppd = private2ppd(file); 617 struct hfi1_devdata *dd = ppd->dd; 618 unsigned long total, csr_off, data; 619 620 if (*ppos < 0) 621 return -EINVAL; 622 /* only write 8 byte quantities */ 623 if ((count % 8) != 0) 624 return -EINVAL; 625 /* offset must be 8-byte aligned */ 626 if ((*ppos % 8) != 0) 627 return -EINVAL; 628 /* do nothing if out of range or zero count */ 629 if (*ppos >= (LCB_END - LCB_START) || !count) 630 return 0; 631 /* reduce count if needed */ 632 if (*ppos + count > LCB_END - LCB_START) 633 count = (LCB_END - LCB_START) - *ppos; 634 635 csr_off = LCB_START + *ppos; 636 for (total = 0; total < count; total += 8, csr_off += 8) { 637 if (get_user(data, (unsigned long __user *)(buf + total))) 638 break; 639 if (write_lcb_csr(dd, csr_off, data)) 640 break; /* failed */ 641 } 642 *ppos += total; 643 return total; 644 } 645 646 /* 647 * read the per-port QSFP data for ppd 648 */ 649 static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf, 650 size_t count, loff_t *ppos) 651 { 652 struct hfi1_pportdata *ppd; 653 char *tmp; 654 int ret; 655 656 ppd = private2ppd(file); 657 tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); 658 if (!tmp) 659 return -ENOMEM; 660 661 ret = qsfp_dump(ppd, tmp, PAGE_SIZE); 662 if (ret > 0) 663 ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); 664 kfree(tmp); 665 return ret; 666 } 667 668 /* Do an i2c write operation on the chain for the given HFI. */ 669 static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf, 670 size_t count, loff_t *ppos, u32 target) 671 { 672 struct hfi1_pportdata *ppd; 673 char *buff; 674 int ret; 675 int i2c_addr; 676 int offset; 677 int total_written; 678 679 ppd = private2ppd(file); 680 681 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */ 682 i2c_addr = (*ppos >> 16) & 0xffff; 683 offset = *ppos & 0xffff; 684 685 /* explicitly reject invalid address 0 to catch cp and cat */ 686 if (i2c_addr == 0) 687 return -EINVAL; 688 689 buff = memdup_user(buf, count); 690 if (IS_ERR(buff)) 691 return PTR_ERR(buff); 692 693 total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count); 694 if (total_written < 0) { 695 ret = total_written; 696 goto _free; 697 } 698 699 *ppos += total_written; 700 701 ret = total_written; 702 703 _free: 704 kfree(buff); 705 return ret; 706 } 707 708 /* Do an i2c write operation on chain for HFI 0. */ 709 static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf, 710 size_t count, loff_t *ppos) 711 { 712 return __i2c_debugfs_write(file, buf, count, ppos, 0); 713 } 714 715 /* Do an i2c write operation on chain for HFI 1. */ 716 static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf, 717 size_t count, loff_t *ppos) 718 { 719 return __i2c_debugfs_write(file, buf, count, ppos, 1); 720 } 721 722 /* Do an i2c read operation on the chain for the given HFI. */ 723 static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf, 724 size_t count, loff_t *ppos, u32 target) 725 { 726 struct hfi1_pportdata *ppd; 727 char *buff; 728 int ret; 729 int i2c_addr; 730 int offset; 731 int total_read; 732 733 ppd = private2ppd(file); 734 735 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */ 736 i2c_addr = (*ppos >> 16) & 0xffff; 737 offset = *ppos & 0xffff; 738 739 /* explicitly reject invalid address 0 to catch cp and cat */ 740 if (i2c_addr == 0) 741 return -EINVAL; 742 743 buff = kmalloc(count, GFP_KERNEL); 744 if (!buff) 745 return -ENOMEM; 746 747 total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count); 748 if (total_read < 0) { 749 ret = total_read; 750 goto _free; 751 } 752 753 *ppos += total_read; 754 755 ret = copy_to_user(buf, buff, total_read); 756 if (ret > 0) { 757 ret = -EFAULT; 758 goto _free; 759 } 760 761 ret = total_read; 762 763 _free: 764 kfree(buff); 765 return ret; 766 } 767 768 /* Do an i2c read operation on chain for HFI 0. */ 769 static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf, 770 size_t count, loff_t *ppos) 771 { 772 return __i2c_debugfs_read(file, buf, count, ppos, 0); 773 } 774 775 /* Do an i2c read operation on chain for HFI 1. */ 776 static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf, 777 size_t count, loff_t *ppos) 778 { 779 return __i2c_debugfs_read(file, buf, count, ppos, 1); 780 } 781 782 /* Do a QSFP write operation on the i2c chain for the given HFI. */ 783 static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf, 784 size_t count, loff_t *ppos, u32 target) 785 { 786 struct hfi1_pportdata *ppd; 787 char *buff; 788 int ret; 789 int total_written; 790 791 if (*ppos + count > QSFP_PAGESIZE * 4) /* base page + page00-page03 */ 792 return -EINVAL; 793 794 ppd = private2ppd(file); 795 796 buff = memdup_user(buf, count); 797 if (IS_ERR(buff)) 798 return PTR_ERR(buff); 799 800 total_written = qsfp_write(ppd, target, *ppos, buff, count); 801 if (total_written < 0) { 802 ret = total_written; 803 goto _free; 804 } 805 806 *ppos += total_written; 807 808 ret = total_written; 809 810 _free: 811 kfree(buff); 812 return ret; 813 } 814 815 /* Do a QSFP write operation on i2c chain for HFI 0. */ 816 static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf, 817 size_t count, loff_t *ppos) 818 { 819 return __qsfp_debugfs_write(file, buf, count, ppos, 0); 820 } 821 822 /* Do a QSFP write operation on i2c chain for HFI 1. */ 823 static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf, 824 size_t count, loff_t *ppos) 825 { 826 return __qsfp_debugfs_write(file, buf, count, ppos, 1); 827 } 828 829 /* Do a QSFP read operation on the i2c chain for the given HFI. */ 830 static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf, 831 size_t count, loff_t *ppos, u32 target) 832 { 833 struct hfi1_pportdata *ppd; 834 char *buff; 835 int ret; 836 int total_read; 837 838 if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */ 839 ret = -EINVAL; 840 goto _return; 841 } 842 843 ppd = private2ppd(file); 844 845 buff = kmalloc(count, GFP_KERNEL); 846 if (!buff) { 847 ret = -ENOMEM; 848 goto _return; 849 } 850 851 total_read = qsfp_read(ppd, target, *ppos, buff, count); 852 if (total_read < 0) { 853 ret = total_read; 854 goto _free; 855 } 856 857 *ppos += total_read; 858 859 ret = copy_to_user(buf, buff, total_read); 860 if (ret > 0) { 861 ret = -EFAULT; 862 goto _free; 863 } 864 865 ret = total_read; 866 867 _free: 868 kfree(buff); 869 _return: 870 return ret; 871 } 872 873 /* Do a QSFP read operation on i2c chain for HFI 0. */ 874 static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf, 875 size_t count, loff_t *ppos) 876 { 877 return __qsfp_debugfs_read(file, buf, count, ppos, 0); 878 } 879 880 /* Do a QSFP read operation on i2c chain for HFI 1. */ 881 static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf, 882 size_t count, loff_t *ppos) 883 { 884 return __qsfp_debugfs_read(file, buf, count, ppos, 1); 885 } 886 887 static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target) 888 { 889 struct hfi1_pportdata *ppd; 890 int ret; 891 892 if (!try_module_get(THIS_MODULE)) 893 return -ENODEV; 894 895 ppd = private2ppd(fp); 896 897 ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0); 898 if (ret) /* failed - release the module */ 899 module_put(THIS_MODULE); 900 901 return ret; 902 } 903 904 static int i2c1_debugfs_open(struct inode *in, struct file *fp) 905 { 906 return __i2c_debugfs_open(in, fp, 0); 907 } 908 909 static int i2c2_debugfs_open(struct inode *in, struct file *fp) 910 { 911 return __i2c_debugfs_open(in, fp, 1); 912 } 913 914 static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target) 915 { 916 struct hfi1_pportdata *ppd; 917 918 ppd = private2ppd(fp); 919 920 release_chip_resource(ppd->dd, i2c_target(target)); 921 module_put(THIS_MODULE); 922 923 return 0; 924 } 925 926 static int i2c1_debugfs_release(struct inode *in, struct file *fp) 927 { 928 return __i2c_debugfs_release(in, fp, 0); 929 } 930 931 static int i2c2_debugfs_release(struct inode *in, struct file *fp) 932 { 933 return __i2c_debugfs_release(in, fp, 1); 934 } 935 936 static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target) 937 { 938 struct hfi1_pportdata *ppd; 939 int ret; 940 941 if (!try_module_get(THIS_MODULE)) 942 return -ENODEV; 943 944 ppd = private2ppd(fp); 945 946 ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0); 947 if (ret) /* failed - release the module */ 948 module_put(THIS_MODULE); 949 950 return ret; 951 } 952 953 static int qsfp1_debugfs_open(struct inode *in, struct file *fp) 954 { 955 return __qsfp_debugfs_open(in, fp, 0); 956 } 957 958 static int qsfp2_debugfs_open(struct inode *in, struct file *fp) 959 { 960 return __qsfp_debugfs_open(in, fp, 1); 961 } 962 963 static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target) 964 { 965 struct hfi1_pportdata *ppd; 966 967 ppd = private2ppd(fp); 968 969 release_chip_resource(ppd->dd, i2c_target(target)); 970 module_put(THIS_MODULE); 971 972 return 0; 973 } 974 975 static int qsfp1_debugfs_release(struct inode *in, struct file *fp) 976 { 977 return __qsfp_debugfs_release(in, fp, 0); 978 } 979 980 static int qsfp2_debugfs_release(struct inode *in, struct file *fp) 981 { 982 return __qsfp_debugfs_release(in, fp, 1); 983 } 984 985 #define DEBUGFS_OPS(nm, readroutine, writeroutine) \ 986 { \ 987 .name = nm, \ 988 .ops = { \ 989 .read = readroutine, \ 990 .write = writeroutine, \ 991 .llseek = generic_file_llseek, \ 992 }, \ 993 } 994 995 #define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \ 996 { \ 997 .name = nm, \ 998 .ops = { \ 999 .read = readf, \ 1000 .write = writef, \ 1001 .llseek = generic_file_llseek, \ 1002 .open = openf, \ 1003 .release = releasef \ 1004 }, \ 1005 } 1006 1007 static const struct counter_info cntr_ops[] = { 1008 DEBUGFS_OPS("counter_names", dev_names_read, NULL), 1009 DEBUGFS_OPS("counters", dev_counters_read, NULL), 1010 DEBUGFS_OPS("portcounter_names", portnames_read, NULL), 1011 }; 1012 1013 static const struct counter_info port_cntr_ops[] = { 1014 DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL), 1015 DEBUGFS_XOPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write, 1016 i2c1_debugfs_open, i2c1_debugfs_release), 1017 DEBUGFS_XOPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write, 1018 i2c2_debugfs_open, i2c2_debugfs_release), 1019 DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL), 1020 DEBUGFS_XOPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write, 1021 qsfp1_debugfs_open, qsfp1_debugfs_release), 1022 DEBUGFS_XOPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write, 1023 qsfp2_debugfs_open, qsfp2_debugfs_release), 1024 DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write), 1025 DEBUGFS_OPS("dc8051_memory", dc8051_memory_read, NULL), 1026 DEBUGFS_OPS("lcb", debugfs_lcb_read, debugfs_lcb_write), 1027 }; 1028 1029 static void *_sdma_cpu_list_seq_start(struct seq_file *s, loff_t *pos) 1030 { 1031 if (*pos >= num_online_cpus()) 1032 return NULL; 1033 1034 return pos; 1035 } 1036 1037 static void *_sdma_cpu_list_seq_next(struct seq_file *s, void *v, loff_t *pos) 1038 { 1039 ++*pos; 1040 if (*pos >= num_online_cpus()) 1041 return NULL; 1042 1043 return pos; 1044 } 1045 1046 static void _sdma_cpu_list_seq_stop(struct seq_file *s, void *v) 1047 { 1048 /* nothing allocated */ 1049 } 1050 1051 static int _sdma_cpu_list_seq_show(struct seq_file *s, void *v) 1052 { 1053 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; 1054 struct hfi1_devdata *dd = dd_from_dev(ibd); 1055 loff_t *spos = v; 1056 loff_t i = *spos; 1057 1058 sdma_seqfile_dump_cpu_list(s, dd, (unsigned long)i); 1059 return 0; 1060 } 1061 1062 DEBUGFS_SEQ_FILE_OPS(sdma_cpu_list); 1063 DEBUGFS_SEQ_FILE_OPEN(sdma_cpu_list) 1064 DEBUGFS_FILE_OPS(sdma_cpu_list); 1065 1066 void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd) 1067 { 1068 char name[sizeof("port0counters") + 1]; 1069 char link[10]; 1070 struct hfi1_devdata *dd = dd_from_dev(ibd); 1071 struct hfi1_pportdata *ppd; 1072 int unit = dd->unit; 1073 int i, j; 1074 1075 if (!hfi1_dbg_root) 1076 return; 1077 snprintf(name, sizeof(name), "%s_%d", class_name(), unit); 1078 snprintf(link, sizeof(link), "%d", unit); 1079 ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root); 1080 if (!ibd->hfi1_ibdev_dbg) { 1081 pr_warn("create of %s failed\n", name); 1082 return; 1083 } 1084 ibd->hfi1_ibdev_link = 1085 debugfs_create_symlink(link, hfi1_dbg_root, name); 1086 if (!ibd->hfi1_ibdev_link) { 1087 pr_warn("create of %s symlink failed\n", name); 1088 return; 1089 } 1090 DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd); 1091 DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd); 1092 DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd); 1093 DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd); 1094 DEBUGFS_SEQ_FILE_CREATE(sdma_cpu_list, ibd->hfi1_ibdev_dbg, ibd); 1095 /* dev counter files */ 1096 for (i = 0; i < ARRAY_SIZE(cntr_ops); i++) 1097 DEBUGFS_FILE_CREATE(cntr_ops[i].name, 1098 ibd->hfi1_ibdev_dbg, 1099 dd, 1100 &cntr_ops[i].ops, S_IRUGO); 1101 /* per port files */ 1102 for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++) 1103 for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) { 1104 snprintf(name, 1105 sizeof(name), 1106 port_cntr_ops[i].name, 1107 j + 1); 1108 DEBUGFS_FILE_CREATE(name, 1109 ibd->hfi1_ibdev_dbg, 1110 ppd, 1111 &port_cntr_ops[i].ops, 1112 !port_cntr_ops[i].ops.write ? 1113 S_IRUGO : S_IRUGO | S_IWUSR); 1114 } 1115 } 1116 1117 void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd) 1118 { 1119 if (!hfi1_dbg_root) 1120 goto out; 1121 debugfs_remove(ibd->hfi1_ibdev_link); 1122 debugfs_remove_recursive(ibd->hfi1_ibdev_dbg); 1123 out: 1124 ibd->hfi1_ibdev_dbg = NULL; 1125 } 1126 1127 /* 1128 * driver stats field names, one line per stat, single string. Used by 1129 * programs like hfistats to print the stats in a way which works for 1130 * different versions of drivers, without changing program source. 1131 * if hfi1_ib_stats changes, this needs to change. Names need to be 1132 * 12 chars or less (w/o newline), for proper display by hfistats utility. 1133 */ 1134 static const char * const hfi1_statnames[] = { 1135 /* must be element 0*/ 1136 "KernIntr", 1137 "ErrorIntr", 1138 "Tx_Errs", 1139 "Rcv_Errs", 1140 "H/W_Errs", 1141 "NoPIOBufs", 1142 "CtxtsOpen", 1143 "RcvLen_Errs", 1144 "EgrBufFull", 1145 "EgrHdrFull" 1146 }; 1147 1148 static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos) 1149 { 1150 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1151 return NULL; 1152 return pos; 1153 } 1154 1155 static void *_driver_stats_names_seq_next( 1156 struct seq_file *s, 1157 void *v, 1158 loff_t *pos) 1159 { 1160 ++*pos; 1161 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1162 return NULL; 1163 return pos; 1164 } 1165 1166 static void _driver_stats_names_seq_stop(struct seq_file *s, void *v) 1167 { 1168 } 1169 1170 static int _driver_stats_names_seq_show(struct seq_file *s, void *v) 1171 { 1172 loff_t *spos = v; 1173 1174 seq_printf(s, "%s\n", hfi1_statnames[*spos]); 1175 return 0; 1176 } 1177 1178 DEBUGFS_SEQ_FILE_OPS(driver_stats_names); 1179 DEBUGFS_SEQ_FILE_OPEN(driver_stats_names) 1180 DEBUGFS_FILE_OPS(driver_stats_names); 1181 1182 static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos) 1183 { 1184 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1185 return NULL; 1186 return pos; 1187 } 1188 1189 static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) 1190 { 1191 ++*pos; 1192 if (*pos >= ARRAY_SIZE(hfi1_statnames)) 1193 return NULL; 1194 return pos; 1195 } 1196 1197 static void _driver_stats_seq_stop(struct seq_file *s, void *v) 1198 { 1199 } 1200 1201 static u64 hfi1_sps_ints(void) 1202 { 1203 unsigned long flags; 1204 struct hfi1_devdata *dd; 1205 u64 sps_ints = 0; 1206 1207 spin_lock_irqsave(&hfi1_devs_lock, flags); 1208 list_for_each_entry(dd, &hfi1_dev_list, list) { 1209 sps_ints += get_all_cpu_total(dd->int_counter); 1210 } 1211 spin_unlock_irqrestore(&hfi1_devs_lock, flags); 1212 return sps_ints; 1213 } 1214 1215 static int _driver_stats_seq_show(struct seq_file *s, void *v) 1216 { 1217 loff_t *spos = v; 1218 char *buffer; 1219 u64 *stats = (u64 *)&hfi1_stats; 1220 size_t sz = seq_get_buf(s, &buffer); 1221 1222 if (sz < sizeof(u64)) 1223 return SEQ_SKIP; 1224 /* special case for interrupts */ 1225 if (*spos == 0) 1226 *(u64 *)buffer = hfi1_sps_ints(); 1227 else 1228 *(u64 *)buffer = stats[*spos]; 1229 seq_commit(s, sizeof(u64)); 1230 return 0; 1231 } 1232 1233 DEBUGFS_SEQ_FILE_OPS(driver_stats); 1234 DEBUGFS_SEQ_FILE_OPEN(driver_stats) 1235 DEBUGFS_FILE_OPS(driver_stats); 1236 1237 void hfi1_dbg_init(void) 1238 { 1239 hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL); 1240 if (!hfi1_dbg_root) 1241 pr_warn("init of debugfs failed\n"); 1242 DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL); 1243 DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL); 1244 } 1245 1246 void hfi1_dbg_exit(void) 1247 { 1248 debugfs_remove_recursive(hfi1_dbg_root); 1249 hfi1_dbg_root = NULL; 1250 } 1251 1252 #endif 1253