drivers/infiniband/hw/hfi1/debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright(c) 2015-2018 Intel Corporation.
   4  */
   5
   6 #include <linux/debugfs.h>
   7 #include <linux/seq_file.h>
   8 #include <linux/kernel.h>
   9 #include <linux/export.h>
  10 #include <linux/string.h>
  11 #include <linux/types.h>
  12 #include <linux/ratelimit.h>
  13 #include <linux/fault-inject.h>
  14
  15 #include "hfi.h"
  16 #include "trace.h"
  17 #include "debugfs.h"
  18 #include "device.h"
  19 #include "qp.h"
  20 #include "sdma.h"
  21 #include "fault.h"
  22
  23 static struct dentry *hfi1_dbg_root;
  24
  25 /* wrappers to enforce srcu in seq file */
  26 ssize_t hfi1_seq_read(struct file *file, char __user *buf, size_t size,
  27                       loff_t *ppos)
  28 {
  29         struct dentry *d = file->f_path.dentry;
  30         ssize_t r;
  31
  32         r = debugfs_file_get(d);
  33         if (unlikely(r))
  34                 return r;
  35         r = seq_read(file, buf, size, ppos);
  36         debugfs_file_put(d);
  37         return r;
  38 }
  39
  40 loff_t hfi1_seq_lseek(struct file *file, loff_t offset, int whence)
  41 {
  42         struct dentry *d = file->f_path.dentry;
  43         loff_t r;
  44
  45         r = debugfs_file_get(d);
  46         if (unlikely(r))
  47                 return r;
  48         r = seq_lseek(file, offset, whence);
  49         debugfs_file_put(d);
  50         return r;
  51 }
  52
  53 #define private2dd(file) (file_inode(file)->i_private)
  54 #define private2ppd(file) (file_inode(file)->i_private)
  55
  56 static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
  57 {
  58         struct hfi1_opcode_stats_perctx *opstats;
  59
  60         if (*pos >= ARRAY_SIZE(opstats->stats))
  61                 return NULL;
  62         return pos;
  63 }
  64
  65 static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
  66 {
  67         struct hfi1_opcode_stats_perctx *opstats;
  68
  69         ++*pos;
  70         if (*pos >= ARRAY_SIZE(opstats->stats))
  71                 return NULL;
  72         return pos;
  73 }
  74
  75 static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
  76 {
  77 }
  78
  79 static int opcode_stats_show(struct seq_file *s, u8 i, u64 packets, u64 bytes)
  80 {
  81         if (!packets && !bytes)
  82                 return SEQ_SKIP;
  83         seq_printf(s, "%02x %llu/%llu\n", i,
  84                    (unsigned long long)packets,
  85                    (unsigned long long)bytes);
  86
  87         return 0;
  88 }
  89
  90 static int _opcode_stats_seq_show(struct seq_file *s, void *v)
  91 {
  92         loff_t *spos = v;
  93         loff_t i = *spos, j;
  94         u64 n_packets = 0, n_bytes = 0;
  95         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
  96         struct hfi1_devdata *dd = dd_from_dev(ibd);
  97         struct hfi1_ctxtdata *rcd;
  98
  99         for (j = 0; j < dd->first_dyn_alloc_ctxt; j++) {
 100                 rcd = hfi1_rcd_get_by_index(dd, j);
 101                 if (rcd) {
 102                         n_packets += rcd->opstats->stats[i].n_packets;
 103                         n_bytes += rcd->opstats->stats[i].n_bytes;
 104                 }
 105                 hfi1_rcd_put(rcd);
 106         }
 107         return opcode_stats_show(s, i, n_packets, n_bytes);
 108 }
 109
 110 DEBUGFS_SEQ_FILE_OPS(opcode_stats);
 111 DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
 112 DEBUGFS_FILE_OPS(opcode_stats);
 113
 114 static void *_tx_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
 115 {
 116         return _opcode_stats_seq_start(s, pos);
 117 }
 118
 119 static void *_tx_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
 120 {
 121         return _opcode_stats_seq_next(s, v, pos);
 122 }
 123
 124 static void _tx_opcode_stats_seq_stop(struct seq_file *s, void *v)
 125 {
 126 }
 127
 128 static int _tx_opcode_stats_seq_show(struct seq_file *s, void *v)
 129 {
 130         loff_t *spos = v;
 131         loff_t i = *spos;
 132         int j;
 133         u64 n_packets = 0, n_bytes = 0;
 134         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 135         struct hfi1_devdata *dd = dd_from_dev(ibd);
 136
 137         for_each_possible_cpu(j) {
 138                 struct hfi1_opcode_stats_perctx *s =
 139                         per_cpu_ptr(dd->tx_opstats, j);
 140                 n_packets += s->stats[i].n_packets;
 141                 n_bytes += s->stats[i].n_bytes;
 142         }
 143         return opcode_stats_show(s, i, n_packets, n_bytes);
 144 }
 145
 146 DEBUGFS_SEQ_FILE_OPS(tx_opcode_stats);
 147 DEBUGFS_SEQ_FILE_OPEN(tx_opcode_stats)
 148 DEBUGFS_FILE_OPS(tx_opcode_stats);
 149
 150 static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
 151 {
 152         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 153         struct hfi1_devdata *dd = dd_from_dev(ibd);
 154
 155         if (!*pos)
 156                 return SEQ_START_TOKEN;
 157         if (*pos >= dd->first_dyn_alloc_ctxt)
 158                 return NULL;
 159         return pos;
 160 }
 161
 162 static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
 163 {
 164         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 165         struct hfi1_devdata *dd = dd_from_dev(ibd);
 166
 167         if (v == SEQ_START_TOKEN)
 168                 return pos;
 169
 170         ++*pos;
 171         if (*pos >= dd->first_dyn_alloc_ctxt)
 172                 return NULL;
 173         return pos;
 174 }
 175
 176 static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
 177 {
 178         /* nothing allocated */
 179 }
 180
 181 static int _ctx_stats_seq_show(struct seq_file *s, void *v)
 182 {
 183         loff_t *spos;
 184         loff_t i, j;
 185         u64 n_packets = 0;
 186         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 187         struct hfi1_devdata *dd = dd_from_dev(ibd);
 188         struct hfi1_ctxtdata *rcd;
 189
 190         if (v == SEQ_START_TOKEN) {
 191                 seq_puts(s, "Ctx:npkts\n");
 192                 return 0;
 193         }
 194
 195         spos = v;
 196         i = *spos;
 197
 198         rcd = hfi1_rcd_get_by_index_safe(dd, i);
 199         if (!rcd)
 200                 return SEQ_SKIP;
 201
 202         for (j = 0; j < ARRAY_SIZE(rcd->opstats->stats); j++)
 203                 n_packets += rcd->opstats->stats[j].n_packets;
 204
 205         hfi1_rcd_put(rcd);
 206
 207         if (!n_packets)
 208                 return SEQ_SKIP;
 209
 210         seq_printf(s, "  %llu:%llu\n", i, n_packets);
 211         return 0;
 212 }
 213
 214 DEBUGFS_SEQ_FILE_OPS(ctx_stats);
 215 DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
 216 DEBUGFS_FILE_OPS(ctx_stats);
 217
 218 static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
 219         __acquires(RCU)
 220 {
 221         struct rvt_qp_iter *iter;
 222         loff_t n = *pos;
 223
 224         iter = rvt_qp_iter_init(s->private, 0, NULL);
 225
 226         /* stop calls rcu_read_unlock */
 227         rcu_read_lock();
 228
 229         if (!iter)
 230                 return NULL;
 231
 232         do {
 233                 if (rvt_qp_iter_next(iter)) {
 234                         kfree(iter);
 235                         return NULL;
 236                 }
 237         } while (n--);
 238
 239         return iter;
 240 }
 241
 242 static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
 243                                 loff_t *pos)
 244         __must_hold(RCU)
 245 {
 246         struct rvt_qp_iter *iter = iter_ptr;
 247
 248         (*pos)++;
 249
 250         if (rvt_qp_iter_next(iter)) {
 251                 kfree(iter);
 252                 return NULL;
 253         }
 254
 255         return iter;
 256 }
 257
 258 static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
 259         __releases(RCU)
 260 {
 261         rcu_read_unlock();
 262 }
 263
 264 static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
 265 {
 266         struct rvt_qp_iter *iter = iter_ptr;
 267
 268         if (!iter)
 269                 return 0;
 270
 271         qp_iter_print(s, iter);
 272
 273         return 0;
 274 }
 275
 276 DEBUGFS_SEQ_FILE_OPS(qp_stats);
 277 DEBUGFS_SEQ_FILE_OPEN(qp_stats)
 278 DEBUGFS_FILE_OPS(qp_stats);
 279
 280 static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
 281 {
 282         struct hfi1_ibdev *ibd;
 283         struct hfi1_devdata *dd;
 284
 285         ibd = (struct hfi1_ibdev *)s->private;
 286         dd = dd_from_dev(ibd);
 287         if (!dd->per_sdma || *pos >= dd->num_sdma)
 288                 return NULL;
 289         return pos;
 290 }
 291
 292 static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
 293 {
 294         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 295         struct hfi1_devdata *dd = dd_from_dev(ibd);
 296
 297         ++*pos;
 298         if (!dd->per_sdma || *pos >= dd->num_sdma)
 299                 return NULL;
 300         return pos;
 301 }
 302
 303 static void _sdes_seq_stop(struct seq_file *s, void *v)
 304 {
 305 }
 306
 307 static int _sdes_seq_show(struct seq_file *s, void *v)
 308 {
 309         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 310         struct hfi1_devdata *dd = dd_from_dev(ibd);
 311         loff_t *spos = v;
 312         loff_t i = *spos;
 313
 314         sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
 315         return 0;
 316 }
 317
 318 DEBUGFS_SEQ_FILE_OPS(sdes);
 319 DEBUGFS_SEQ_FILE_OPEN(sdes)
 320 DEBUGFS_FILE_OPS(sdes);
 321
 322 static void *_rcds_seq_start(struct seq_file *s, loff_t *pos)
 323 {
 324         struct hfi1_ibdev *ibd;
 325         struct hfi1_devdata *dd;
 326
 327         ibd = (struct hfi1_ibdev *)s->private;
 328         dd = dd_from_dev(ibd);
 329         if (!dd->rcd || *pos >= dd->n_krcv_queues)
 330                 return NULL;
 331         return pos;
 332 }
 333
 334 static void *_rcds_seq_next(struct seq_file *s, void *v, loff_t *pos)
 335 {
 336         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 337         struct hfi1_devdata *dd = dd_from_dev(ibd);
 338
 339         ++*pos;
 340         if (!dd->rcd || *pos >= dd->num_rcv_contexts)
 341                 return NULL;
 342         return pos;
 343 }
 344
 345 static void _rcds_seq_stop(struct seq_file *s, void *v)
 346 {
 347 }
 348
 349 static int _rcds_seq_show(struct seq_file *s, void *v)
 350 {
 351         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 352         struct hfi1_devdata *dd = dd_from_dev(ibd);
 353         struct hfi1_ctxtdata *rcd;
 354         loff_t *spos = v;
 355         loff_t i = *spos;
 356
 357         rcd = hfi1_rcd_get_by_index_safe(dd, i);
 358         if (rcd)
 359                 seqfile_dump_rcd(s, rcd);
 360         hfi1_rcd_put(rcd);
 361         return 0;
 362 }
 363
 364 DEBUGFS_SEQ_FILE_OPS(rcds);
 365 DEBUGFS_SEQ_FILE_OPEN(rcds)
 366 DEBUGFS_FILE_OPS(rcds);
 367
 368 static void *_pios_seq_start(struct seq_file *s, loff_t *pos)
 369 {
 370         struct hfi1_ibdev *ibd;
 371         struct hfi1_devdata *dd;
 372
 373         ibd = (struct hfi1_ibdev *)s->private;
 374         dd = dd_from_dev(ibd);
 375         if (!dd->send_contexts || *pos >= dd->num_send_contexts)
 376                 return NULL;
 377         return pos;
 378 }
 379
 380 static void *_pios_seq_next(struct seq_file *s, void *v, loff_t *pos)
 381 {
 382         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 383         struct hfi1_devdata *dd = dd_from_dev(ibd);
 384
 385         ++*pos;
 386         if (!dd->send_contexts || *pos >= dd->num_send_contexts)
 387                 return NULL;
 388         return pos;
 389 }
 390
 391 static void _pios_seq_stop(struct seq_file *s, void *v)
 392 {
 393 }
 394
 395 static int _pios_seq_show(struct seq_file *s, void *v)
 396 {
 397         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
 398         struct hfi1_devdata *dd = dd_from_dev(ibd);
 399         struct send_context_info *sci;
 400         loff_t *spos = v;
 401         loff_t i = *spos;
 402         unsigned long flags;
 403
 404         spin_lock_irqsave(&dd->sc_lock, flags);
 405         sci = &dd->send_contexts[i];
 406         if (sci && sci->type != SC_USER && sci->allocated && sci->sc)
 407                 seqfile_dump_sci(s, i, sci);
 408         spin_unlock_irqrestore(&dd->sc_lock, flags);
 409         return 0;
 410 }
 411
 412 DEBUGFS_SEQ_FILE_OPS(pios);
 413 DEBUGFS_SEQ_FILE_OPEN(pios)
 414 DEBUGFS_FILE_OPS(pios);
 415
 416 /* read the per-device counters */
 417 static ssize_t dev_counters_read(struct file *file, char __user *buf,
 418                                  size_t count, loff_t *ppos)
 419 {
 420         u64 *counters;
 421         size_t avail;
 422         struct hfi1_devdata *dd;
 423         ssize_t rval;
 424
 425         dd = private2dd(file);
 426         avail = hfi1_read_cntrs(dd, NULL, &counters);
 427         rval =  simple_read_from_buffer(buf, count, ppos, counters, avail);
 428         return rval;
 429 }
 430
 431 /* read the per-device counters */
 432 static ssize_t dev_names_read(struct file *file, char __user *buf,
 433                               size_t count, loff_t *ppos)
 434 {
 435         char *names;
 436         size_t avail;
 437         struct hfi1_devdata *dd;
 438         ssize_t rval;
 439
 440         dd = private2dd(file);
 441         avail = hfi1_read_cntrs(dd, &names, NULL);
 442         rval =  simple_read_from_buffer(buf, count, ppos, names, avail);
 443         return rval;
 444 }
 445
 446 struct counter_info {
 447         char *name;
 448         const struct file_operations ops;
 449 };
 450
 451 /*
 452  * Could use file_inode(file)->i_ino to figure out which file,
 453  * instead of separate routine for each, but for now, this works...
 454  */
 455
 456 /* read the per-port names (same for each port) */
 457 static ssize_t portnames_read(struct file *file, char __user *buf,
 458                               size_t count, loff_t *ppos)
 459 {
 460         char *names;
 461         size_t avail;
 462         struct hfi1_devdata *dd;
 463         ssize_t rval;
 464
 465         dd = private2dd(file);
 466         avail = hfi1_read_portcntrs(dd->pport, &names, NULL);
 467         rval = simple_read_from_buffer(buf, count, ppos, names, avail);
 468         return rval;
 469 }
 470
 471 /* read the per-port counters */
 472 static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
 473                                       size_t count, loff_t *ppos)
 474 {
 475         u64 *counters;
 476         size_t avail;
 477         struct hfi1_pportdata *ppd;
 478         ssize_t rval;
 479
 480         ppd = private2ppd(file);
 481         avail = hfi1_read_portcntrs(ppd, NULL, &counters);
 482         rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
 483         return rval;
 484 }
 485
 486 static void check_dyn_flag(u64 scratch0, char *p, int size, int *used,
 487                            int this_hfi, int hfi, u32 flag, const char *what)
 488 {
 489         u32 mask;
 490
 491         mask = flag << (hfi ? CR_DYN_SHIFT : 0);
 492         if (scratch0 & mask) {
 493                 *used += scnprintf(p + *used, size - *used,
 494                                    "  0x%08x - HFI%d %s in use, %s device\n",
 495                                    mask, hfi, what,
 496                                    this_hfi == hfi ? "this" : "other");
 497         }
 498 }
 499
 500 static ssize_t asic_flags_read(struct file *file, char __user *buf,
 501                                size_t count, loff_t *ppos)
 502 {
 503         struct hfi1_pportdata *ppd;
 504         struct hfi1_devdata *dd;
 505         u64 scratch0;
 506         char *tmp;
 507         int ret = 0;
 508         int size;
 509         int used;
 510         int i;
 511
 512         ppd = private2ppd(file);
 513         dd = ppd->dd;
 514         size = PAGE_SIZE;
 515         used = 0;
 516         tmp = kmalloc(size, GFP_KERNEL);
 517         if (!tmp)
 518                 return -ENOMEM;
 519
 520         scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
 521         used += scnprintf(tmp + used, size - used,
 522                           "Resource flags: 0x%016llx\n", scratch0);
 523
 524         /* check permanent flag */
 525         if (scratch0 & CR_THERM_INIT) {
 526                 used += scnprintf(tmp + used, size - used,
 527                                   "  0x%08x - thermal monitoring initialized\n",
 528                                   (u32)CR_THERM_INIT);
 529         }
 530
 531         /* check each dynamic flag on each HFI */
 532         for (i = 0; i < 2; i++) {
 533                 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
 534                                CR_SBUS, "SBus");
 535                 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
 536                                CR_EPROM, "EPROM");
 537                 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
 538                                CR_I2C1, "i2c chain 1");
 539                 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
 540                                CR_I2C2, "i2c chain 2");
 541         }
 542         used += scnprintf(tmp + used, size - used, "Write bits to clear\n");
 543
 544         ret = simple_read_from_buffer(buf, count, ppos, tmp, used);
 545         kfree(tmp);
 546         return ret;
 547 }
 548
 549 static ssize_t asic_flags_write(struct file *file, const char __user *buf,
 550                                 size_t count, loff_t *ppos)
 551 {
 552         struct hfi1_pportdata *ppd;
 553         struct hfi1_devdata *dd;
 554         char *buff;
 555         int ret;
 556         unsigned long long value;
 557         u64 scratch0;
 558         u64 clear;
 559
 560         ppd = private2ppd(file);
 561         dd = ppd->dd;
 562
 563         /* zero terminate and read the expected integer */
 564         buff = memdup_user_nul(buf, count);
 565         if (IS_ERR(buff))
 566                 return PTR_ERR(buff);
 567
 568         ret = kstrtoull(buff, 0, &value);
 569         if (ret)
 570                 goto do_free;
 571         clear = value;
 572
 573         /* obtain exclusive access */
 574         mutex_lock(&dd->asic_data->asic_resource_mutex);
 575         acquire_hw_mutex(dd);
 576
 577         scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
 578         scratch0 &= ~clear;
 579         write_csr(dd, ASIC_CFG_SCRATCH, scratch0);
 580         /* force write to be visible to other HFI on another OS */
 581         (void)read_csr(dd, ASIC_CFG_SCRATCH);
 582
 583         release_hw_mutex(dd);
 584         mutex_unlock(&dd->asic_data->asic_resource_mutex);
 585
 586         /* return the number of bytes written */
 587         ret = count;
 588
 589  do_free:
 590         kfree(buff);
 591         return ret;
 592 }
 593
 594 /* read the dc8051 memory */
 595 static ssize_t dc8051_memory_read(struct file *file, char __user *buf,
 596                                   size_t count, loff_t *ppos)
 597 {
 598         struct hfi1_pportdata *ppd = private2ppd(file);
 599         ssize_t rval;
 600         void *tmp;
 601         loff_t start, end;
 602
 603         /* the checks below expect the position to be positive */
 604         if (*ppos < 0)
 605                 return -EINVAL;
 606
 607         tmp = kzalloc(DC8051_DATA_MEM_SIZE, GFP_KERNEL);
 608         if (!tmp)
 609                 return -ENOMEM;
 610
 611         /*
 612          * Fill in the requested portion of the temporary buffer from the
 613          * 8051 memory.  The 8051 memory read is done in terms of 8 bytes.
 614          * Adjust start and end to fit.  Skip reading anything if out of
 615          * range.
 616          */
 617         start = *ppos & ~0x7;   /* round down */
 618         if (start < DC8051_DATA_MEM_SIZE) {
 619                 end = (*ppos + count + 7) & ~0x7; /* round up */
 620                 if (end > DC8051_DATA_MEM_SIZE)
 621                         end = DC8051_DATA_MEM_SIZE;
 622                 rval = read_8051_data(ppd->dd, start, end - start,
 623                                       (u64 *)(tmp + start));
 624                 if (rval)
 625                         goto done;
 626         }
 627
 628         rval = simple_read_from_buffer(buf, count, ppos, tmp,
 629                                        DC8051_DATA_MEM_SIZE);
 630 done:
 631         kfree(tmp);
 632         return rval;
 633 }
 634
 635 static ssize_t debugfs_lcb_read(struct file *file, char __user *buf,
 636                                 size_t count, loff_t *ppos)
 637 {
 638         struct hfi1_pportdata *ppd = private2ppd(file);
 639         struct hfi1_devdata *dd = ppd->dd;
 640         unsigned long total, csr_off;
 641         u64 data;
 642
 643         if (*ppos < 0)
 644                 return -EINVAL;
 645         /* only read 8 byte quantities */
 646         if ((count % 8) != 0)
 647                 return -EINVAL;
 648         /* offset must be 8-byte aligned */
 649         if ((*ppos % 8) != 0)
 650                 return -EINVAL;
 651         /* do nothing if out of range or zero count */
 652         if (*ppos >= (LCB_END - LCB_START) || !count)
 653                 return 0;
 654         /* reduce count if needed */
 655         if (*ppos + count > LCB_END - LCB_START)
 656                 count = (LCB_END - LCB_START) - *ppos;
 657
 658         csr_off = LCB_START + *ppos;
 659         for (total = 0; total < count; total += 8, csr_off += 8) {
 660                 if (read_lcb_csr(dd, csr_off, (u64 *)&data))
 661                         break; /* failed */
 662                 if (put_user(data, (unsigned long __user *)(buf + total)))
 663                         break;
 664         }
 665         *ppos += total;
 666         return total;
 667 }
 668
 669 static ssize_t debugfs_lcb_write(struct file *file, const char __user *buf,
 670                                  size_t count, loff_t *ppos)
 671 {
 672         struct hfi1_pportdata *ppd = private2ppd(file);
 673         struct hfi1_devdata *dd = ppd->dd;
 674         unsigned long total, csr_off, data;
 675
 676         if (*ppos < 0)
 677                 return -EINVAL;
 678         /* only write 8 byte quantities */
 679         if ((count % 8) != 0)
 680                 return -EINVAL;
 681         /* offset must be 8-byte aligned */
 682         if ((*ppos % 8) != 0)
 683                 return -EINVAL;
 684         /* do nothing if out of range or zero count */
 685         if (*ppos >= (LCB_END - LCB_START) || !count)
 686                 return 0;
 687         /* reduce count if needed */
 688         if (*ppos + count > LCB_END - LCB_START)
 689                 count = (LCB_END - LCB_START) - *ppos;
 690
 691         csr_off = LCB_START + *ppos;
 692         for (total = 0; total < count; total += 8, csr_off += 8) {
 693                 if (get_user(data, (unsigned long __user *)(buf + total)))
 694                         break;
 695                 if (write_lcb_csr(dd, csr_off, data))
 696                         break; /* failed */
 697         }
 698         *ppos += total;
 699         return total;
 700 }
 701
 702 /*
 703  * read the per-port QSFP data for ppd
 704  */
 705 static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
 706                                  size_t count, loff_t *ppos)
 707 {
 708         struct hfi1_pportdata *ppd;
 709         char *tmp;
 710         int ret;
 711
 712         ppd = private2ppd(file);
 713         tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
 714         if (!tmp)
 715                 return -ENOMEM;
 716
 717         ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
 718         if (ret > 0)
 719                 ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
 720         kfree(tmp);
 721         return ret;
 722 }
 723
 724 /* Do an i2c write operation on the chain for the given HFI. */
 725 static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
 726                                    size_t count, loff_t *ppos, u32 target)
 727 {
 728         struct hfi1_pportdata *ppd;
 729         char *buff;
 730         int ret;
 731         int i2c_addr;
 732         int offset;
 733         int total_written;
 734
 735         ppd = private2ppd(file);
 736
 737         /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
 738         i2c_addr = (*ppos >> 16) & 0xffff;
 739         offset = *ppos & 0xffff;
 740
 741         /* explicitly reject invalid address 0 to catch cp and cat */
 742         if (i2c_addr == 0)
 743                 return -EINVAL;
 744
 745         buff = memdup_user(buf, count);
 746         if (IS_ERR(buff))
 747                 return PTR_ERR(buff);
 748
 749         total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
 750         if (total_written < 0) {
 751                 ret = total_written;
 752                 goto _free;
 753         }
 754
 755         *ppos += total_written;
 756
 757         ret = total_written;
 758
 759  _free:
 760         kfree(buff);
 761         return ret;
 762 }
 763
 764 /* Do an i2c write operation on chain for HFI 0. */
 765 static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
 766                                   size_t count, loff_t *ppos)
 767 {
 768         return __i2c_debugfs_write(file, buf, count, ppos, 0);
 769 }
 770
 771 /* Do an i2c write operation on chain for HFI 1. */
 772 static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
 773                                   size_t count, loff_t *ppos)
 774 {
 775         return __i2c_debugfs_write(file, buf, count, ppos, 1);
 776 }
 777
 778 /* Do an i2c read operation on the chain for the given HFI. */
 779 static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
 780                                   size_t count, loff_t *ppos, u32 target)
 781 {
 782         struct hfi1_pportdata *ppd;
 783         char *buff;
 784         int ret;
 785         int i2c_addr;
 786         int offset;
 787         int total_read;
 788
 789         ppd = private2ppd(file);
 790
 791         /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
 792         i2c_addr = (*ppos >> 16) & 0xffff;
 793         offset = *ppos & 0xffff;
 794
 795         /* explicitly reject invalid address 0 to catch cp and cat */
 796         if (i2c_addr == 0)
 797                 return -EINVAL;
 798
 799         buff = kmalloc(count, GFP_KERNEL);
 800         if (!buff)
 801                 return -ENOMEM;
 802
 803         total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
 804         if (total_read < 0) {
 805                 ret = total_read;
 806                 goto _free;
 807         }
 808
 809         *ppos += total_read;
 810
 811         ret = copy_to_user(buf, buff, total_read);
 812         if (ret > 0) {
 813                 ret = -EFAULT;
 814                 goto _free;
 815         }
 816
 817         ret = total_read;
 818
 819  _free:
 820         kfree(buff);
 821         return ret;
 822 }
 823
 824 /* Do an i2c read operation on chain for HFI 0. */
 825 static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
 826                                  size_t count, loff_t *ppos)
 827 {
 828         return __i2c_debugfs_read(file, buf, count, ppos, 0);
 829 }
 830
 831 /* Do an i2c read operation on chain for HFI 1. */
 832 static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
 833                                  size_t count, loff_t *ppos)
 834 {
 835         return __i2c_debugfs_read(file, buf, count, ppos, 1);
 836 }
 837
 838 /* Do a QSFP write operation on the i2c chain for the given HFI. */
 839 static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
 840                                     size_t count, loff_t *ppos, u32 target)
 841 {
 842         struct hfi1_pportdata *ppd;
 843         char *buff;
 844         int ret;
 845         int total_written;
 846
 847         if (*ppos + count > QSFP_PAGESIZE * 4) /* base page + page00-page03 */
 848                 return -EINVAL;
 849
 850         ppd = private2ppd(file);
 851
 852         buff = memdup_user(buf, count);
 853         if (IS_ERR(buff))
 854                 return PTR_ERR(buff);
 855
 856         total_written = qsfp_write(ppd, target, *ppos, buff, count);
 857         if (total_written < 0) {
 858                 ret = total_written;
 859                 goto _free;
 860         }
 861
 862         *ppos += total_written;
 863
 864         ret = total_written;
 865
 866  _free:
 867         kfree(buff);
 868         return ret;
 869 }
 870
 871 /* Do a QSFP write operation on i2c chain for HFI 0. */
 872 static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
 873                                    size_t count, loff_t *ppos)
 874 {
 875         return __qsfp_debugfs_write(file, buf, count, ppos, 0);
 876 }
 877
 878 /* Do a QSFP write operation on i2c chain for HFI 1. */
 879 static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
 880                                    size_t count, loff_t *ppos)
 881 {
 882         return __qsfp_debugfs_write(file, buf, count, ppos, 1);
 883 }
 884
 885 /* Do a QSFP read operation on the i2c chain for the given HFI. */
 886 static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
 887                                    size_t count, loff_t *ppos, u32 target)
 888 {
 889         struct hfi1_pportdata *ppd;
 890         char *buff;
 891         int ret;
 892         int total_read;
 893
 894         if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
 895                 ret = -EINVAL;
 896                 goto _return;
 897         }
 898
 899         ppd = private2ppd(file);
 900
 901         buff = kmalloc(count, GFP_KERNEL);
 902         if (!buff) {
 903                 ret = -ENOMEM;
 904                 goto _return;
 905         }
 906
 907         total_read = qsfp_read(ppd, target, *ppos, buff, count);
 908         if (total_read < 0) {
 909                 ret = total_read;
 910                 goto _free;
 911         }
 912
 913         *ppos += total_read;
 914
 915         ret = copy_to_user(buf, buff, total_read);
 916         if (ret > 0) {
 917                 ret = -EFAULT;
 918                 goto _free;
 919         }
 920
 921         ret = total_read;
 922
 923  _free:
 924         kfree(buff);
 925  _return:
 926         return ret;
 927 }
 928
 929 /* Do a QSFP read operation on i2c chain for HFI 0. */
 930 static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
 931                                   size_t count, loff_t *ppos)
 932 {
 933         return __qsfp_debugfs_read(file, buf, count, ppos, 0);
 934 }
 935
 936 /* Do a QSFP read operation on i2c chain for HFI 1. */
 937 static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
 938                                   size_t count, loff_t *ppos)
 939 {
 940         return __qsfp_debugfs_read(file, buf, count, ppos, 1);
 941 }
 942
 943 static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target)
 944 {
 945         struct hfi1_pportdata *ppd;
 946
 947         ppd = private2ppd(fp);
 948
 949         return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
 950 }
 951
 952 static int i2c1_debugfs_open(struct inode *in, struct file *fp)
 953 {
 954         return __i2c_debugfs_open(in, fp, 0);
 955 }
 956
 957 static int i2c2_debugfs_open(struct inode *in, struct file *fp)
 958 {
 959         return __i2c_debugfs_open(in, fp, 1);
 960 }
 961
 962 static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target)
 963 {
 964         struct hfi1_pportdata *ppd;
 965
 966         ppd = private2ppd(fp);
 967
 968         release_chip_resource(ppd->dd, i2c_target(target));
 969
 970         return 0;
 971 }
 972
 973 static int i2c1_debugfs_release(struct inode *in, struct file *fp)
 974 {
 975         return __i2c_debugfs_release(in, fp, 0);
 976 }
 977
 978 static int i2c2_debugfs_release(struct inode *in, struct file *fp)
 979 {
 980         return __i2c_debugfs_release(in, fp, 1);
 981 }
 982
 983 static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target)
 984 {
 985         struct hfi1_pportdata *ppd;
 986
 987         ppd = private2ppd(fp);
 988
 989         return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
 990 }
 991
 992 static int qsfp1_debugfs_open(struct inode *in, struct file *fp)
 993 {
 994         return __qsfp_debugfs_open(in, fp, 0);
 995 }
 996
 997 static int qsfp2_debugfs_open(struct inode *in, struct file *fp)
 998 {
 999         return __qsfp_debugfs_open(in, fp, 1);
1000 }
1001
1002 static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target)
1003 {
1004         struct hfi1_pportdata *ppd;
1005
1006         ppd = private2ppd(fp);
1007
1008         release_chip_resource(ppd->dd, i2c_target(target));
1009
1010         return 0;
1011 }
1012
1013 static int qsfp1_debugfs_release(struct inode *in, struct file *fp)
1014 {
1015         return __qsfp_debugfs_release(in, fp, 0);
1016 }
1017
1018 static int qsfp2_debugfs_release(struct inode *in, struct file *fp)
1019 {
1020         return __qsfp_debugfs_release(in, fp, 1);
1021 }
1022
1023 #define EXPROM_WRITE_ENABLE BIT_ULL(14)
1024
1025 static bool exprom_wp_disabled;
1026
1027 static int exprom_wp_set(struct hfi1_devdata *dd, bool disable)
1028 {
1029         u64 gpio_val = 0;
1030
1031         if (disable) {
1032                 gpio_val = EXPROM_WRITE_ENABLE;
1033                 exprom_wp_disabled = true;
1034                 dd_dev_info(dd, "Disable Expansion ROM Write Protection\n");
1035         } else {
1036                 exprom_wp_disabled = false;
1037                 dd_dev_info(dd, "Enable Expansion ROM Write Protection\n");
1038         }
1039
1040         write_csr(dd, ASIC_GPIO_OUT, gpio_val);
1041         write_csr(dd, ASIC_GPIO_OE, gpio_val);
1042
1043         return 0;
1044 }
1045
1046 static ssize_t exprom_wp_debugfs_read(struct file *file, char __user *buf,
1047                                       size_t count, loff_t *ppos)
1048 {
1049         return 0;
1050 }
1051
1052 static ssize_t exprom_wp_debugfs_write(struct file *file,
1053                                        const char __user *buf, size_t count,
1054                                        loff_t *ppos)
1055 {
1056         struct hfi1_pportdata *ppd = private2ppd(file);
1057         char cdata;
1058
1059         if (count != 1)
1060                 return -EINVAL;
1061         if (get_user(cdata, buf))
1062                 return -EFAULT;
1063         if (cdata == '0')
1064                 exprom_wp_set(ppd->dd, false);
1065         else if (cdata == '1')
1066                 exprom_wp_set(ppd->dd, true);
1067         else
1068                 return -EINVAL;
1069
1070         return 1;
1071 }
1072
1073 static unsigned long exprom_in_use;
1074
1075 static int exprom_wp_debugfs_open(struct inode *in, struct file *fp)
1076 {
1077         if (test_and_set_bit(0, &exprom_in_use))
1078                 return -EBUSY;
1079
1080         return 0;
1081 }
1082
1083 static int exprom_wp_debugfs_release(struct inode *in, struct file *fp)
1084 {
1085         struct hfi1_pportdata *ppd = private2ppd(fp);
1086
1087         if (exprom_wp_disabled)
1088                 exprom_wp_set(ppd->dd, false);
1089         clear_bit(0, &exprom_in_use);
1090
1091         return 0;
1092 }
1093
1094 #define DEBUGFS_OPS(nm, readroutine, writeroutine)      \
1095 { \
1096         .name = nm, \
1097         .ops = { \
1098                 .owner = THIS_MODULE, \
1099                 .read = readroutine, \
1100                 .write = writeroutine, \
1101                 .llseek = generic_file_llseek, \
1102         }, \
1103 }
1104
1105 #define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \
1106 { \
1107         .name = nm, \
1108         .ops = { \
1109                 .owner = THIS_MODULE, \
1110                 .read = readf, \
1111                 .write = writef, \
1112                 .llseek = generic_file_llseek, \
1113                 .open = openf, \
1114                 .release = releasef \
1115         }, \
1116 }
1117
1118 static const struct counter_info cntr_ops[] = {
1119         DEBUGFS_OPS("counter_names", dev_names_read, NULL),
1120         DEBUGFS_OPS("counters", dev_counters_read, NULL),
1121         DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
1122 };
1123
1124 static const struct counter_info port_cntr_ops[] = {
1125         DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
1126         DEBUGFS_XOPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write,
1127                      i2c1_debugfs_open, i2c1_debugfs_release),
1128         DEBUGFS_XOPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write,
1129                      i2c2_debugfs_open, i2c2_debugfs_release),
1130         DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
1131         DEBUGFS_XOPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write,
1132                      qsfp1_debugfs_open, qsfp1_debugfs_release),
1133         DEBUGFS_XOPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write,
1134                      qsfp2_debugfs_open, qsfp2_debugfs_release),
1135         DEBUGFS_XOPS("exprom_wp", exprom_wp_debugfs_read,
1136                      exprom_wp_debugfs_write, exprom_wp_debugfs_open,
1137                      exprom_wp_debugfs_release),
1138         DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write),
1139         DEBUGFS_OPS("dc8051_memory", dc8051_memory_read, NULL),
1140         DEBUGFS_OPS("lcb", debugfs_lcb_read, debugfs_lcb_write),
1141 };
1142
1143 static void *_sdma_cpu_list_seq_start(struct seq_file *s, loff_t *pos)
1144 {
1145         if (*pos >= num_online_cpus())
1146                 return NULL;
1147
1148         return pos;
1149 }
1150
1151 static void *_sdma_cpu_list_seq_next(struct seq_file *s, void *v, loff_t *pos)
1152 {
1153         ++*pos;
1154         if (*pos >= num_online_cpus())
1155                 return NULL;
1156
1157         return pos;
1158 }
1159
1160 static void _sdma_cpu_list_seq_stop(struct seq_file *s, void *v)
1161 {
1162         /* nothing allocated */
1163 }
1164
1165 static int _sdma_cpu_list_seq_show(struct seq_file *s, void *v)
1166 {
1167         struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
1168         struct hfi1_devdata *dd = dd_from_dev(ibd);
1169         loff_t *spos = v;
1170         loff_t i = *spos;
1171
1172         sdma_seqfile_dump_cpu_list(s, dd, (unsigned long)i);
1173         return 0;
1174 }
1175
1176 DEBUGFS_SEQ_FILE_OPS(sdma_cpu_list);
1177 DEBUGFS_SEQ_FILE_OPEN(sdma_cpu_list)
1178 DEBUGFS_FILE_OPS(sdma_cpu_list);
1179
1180 void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
1181 {
1182         char name[sizeof("port0counters") + 1];
1183         char link[10];
1184         struct hfi1_devdata *dd = dd_from_dev(ibd);
1185         struct hfi1_pportdata *ppd;
1186         struct dentry *root;
1187         int unit = dd->unit;
1188         int i, j;
1189
1190         if (!hfi1_dbg_root)
1191                 return;
1192         snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
1193         snprintf(link, sizeof(link), "%d", unit);
1194         root = debugfs_create_dir(name, hfi1_dbg_root);
1195         ibd->hfi1_ibdev_dbg = root;
1196
1197         ibd->hfi1_ibdev_link =
1198                 debugfs_create_symlink(link, hfi1_dbg_root, name);
1199
1200         debugfs_create_file("opcode_stats", 0444, root, ibd,
1201                             &_opcode_stats_file_ops);
1202         debugfs_create_file("tx_opcode_stats", 0444, root, ibd,
1203                             &_tx_opcode_stats_file_ops);
1204         debugfs_create_file("ctx_stats", 0444, root, ibd, &_ctx_stats_file_ops);
1205         debugfs_create_file("qp_stats", 0444, root, ibd, &_qp_stats_file_ops);
1206         debugfs_create_file("sdes", 0444, root, ibd, &_sdes_file_ops);
1207         debugfs_create_file("rcds", 0444, root, ibd, &_rcds_file_ops);
1208         debugfs_create_file("pios", 0444, root, ibd, &_pios_file_ops);
1209         debugfs_create_file("sdma_cpu_list", 0444, root, ibd,
1210                             &_sdma_cpu_list_file_ops);
1211
1212         /* dev counter files */
1213         for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
1214                 debugfs_create_file(cntr_ops[i].name, 0444, root, dd,
1215                                     &cntr_ops[i].ops);
1216
1217         /* per port files */
1218         for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
1219                 for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
1220                         snprintf(name,
1221                                  sizeof(name),
1222                                  port_cntr_ops[i].name,
1223                                  j + 1);
1224                         debugfs_create_file(name,
1225                                             !port_cntr_ops[i].ops.write ?
1226                                                     S_IRUGO :
1227                                                     S_IRUGO | S_IWUSR,
1228                                             root, ppd, &port_cntr_ops[i].ops);
1229                 }
1230
1231         hfi1_fault_init_debugfs(ibd);
1232 }
1233
1234 void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
1235 {
1236         if (!hfi1_dbg_root)
1237                 goto out;
1238         hfi1_fault_exit_debugfs(ibd);
1239         debugfs_remove(ibd->hfi1_ibdev_link);
1240         debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
1241 out:
1242         ibd->hfi1_ibdev_dbg = NULL;
1243 }
1244
1245 /*
1246  * driver stats field names, one line per stat, single string.  Used by
1247  * programs like hfistats to print the stats in a way which works for
1248  * different versions of drivers, without changing program source.
1249  * if hfi1_ib_stats changes, this needs to change.  Names need to be
1250  * 12 chars or less (w/o newline), for proper display by hfistats utility.
1251  */
1252 static const char * const hfi1_statnames[] = {
1253         /* must be element 0*/
1254         "KernIntr",
1255         "ErrorIntr",
1256         "Tx_Errs",
1257         "Rcv_Errs",
1258         "H/W_Errs",
1259         "NoPIOBufs",
1260         "CtxtsOpen",
1261         "RcvLen_Errs",
1262         "EgrBufFull",
1263         "EgrHdrFull"
1264 };
1265
1266 static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
1267 {
1268         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1269                 return NULL;
1270         return pos;
1271 }
1272
1273 static void *_driver_stats_names_seq_next(
1274         struct seq_file *s,
1275         void *v,
1276         loff_t *pos)
1277 {
1278         ++*pos;
1279         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1280                 return NULL;
1281         return pos;
1282 }
1283
1284 static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
1285 {
1286 }
1287
1288 static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
1289 {
1290         loff_t *spos = v;
1291
1292         seq_printf(s, "%s\n", hfi1_statnames[*spos]);
1293         return 0;
1294 }
1295
1296 DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
1297 DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
1298 DEBUGFS_FILE_OPS(driver_stats_names);
1299
1300 static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
1301 {
1302         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1303                 return NULL;
1304         return pos;
1305 }
1306
1307 static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
1308 {
1309         ++*pos;
1310         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1311                 return NULL;
1312         return pos;
1313 }
1314
1315 static void _driver_stats_seq_stop(struct seq_file *s, void *v)
1316 {
1317 }
1318
1319 static void hfi1_sps_show_ints(struct seq_file *s)
1320 {
1321         unsigned long index, flags;
1322         struct hfi1_devdata *dd;
1323         u64 sps_ints = 0;
1324
1325         xa_lock_irqsave(&hfi1_dev_table, flags);
1326         xa_for_each(&hfi1_dev_table, index, dd) {
1327                 sps_ints += get_all_cpu_total(dd->int_counter);
1328         }
1329         xa_unlock_irqrestore(&hfi1_dev_table, flags);
1330         seq_write(s, &sps_ints, sizeof(u64));
1331 }
1332
1333 static int _driver_stats_seq_show(struct seq_file *s, void *v)
1334 {
1335         loff_t *spos = v;
1336         u64 *stats = (u64 *)&hfi1_stats;
1337
1338         /* special case for interrupts */
1339         if (*spos == 0)
1340                 hfi1_sps_show_ints(s);
1341         else
1342                 seq_write(s, stats + *spos, sizeof(u64));
1343         return 0;
1344 }
1345
1346 DEBUGFS_SEQ_FILE_OPS(driver_stats);
1347 DEBUGFS_SEQ_FILE_OPEN(driver_stats)
1348 DEBUGFS_FILE_OPS(driver_stats);
1349
1350 void hfi1_dbg_init(void)
1351 {
1352         hfi1_dbg_root  = debugfs_create_dir(DRIVER_NAME, NULL);
1353         debugfs_create_file("driver_stats_names", 0444, hfi1_dbg_root, NULL,
1354                             &_driver_stats_names_file_ops);
1355         debugfs_create_file("driver_stats", 0444, hfi1_dbg_root, NULL,
1356                             &_driver_stats_file_ops);
1357 }
1358
1359 void hfi1_dbg_exit(void)
1360 {
1361         debugfs_remove_recursive(hfi1_dbg_root);
1362         hfi1_dbg_root = NULL;
1363 }