drivers/infiniband/hw/hfi1/debugfs.c

   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 void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
 937 {
 938         char name[sizeof("port0counters") + 1];
 939         char link[10];
 940         struct hfi1_devdata *dd = dd_from_dev(ibd);
 941         struct hfi1_pportdata *ppd;
 942         int unit = dd->unit;
 943         int i, j;
 944
 945         if (!hfi1_dbg_root)
 946                 return;
 947         snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
 948         snprintf(link, sizeof(link), "%d", unit);
 949         ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root);
 950         if (!ibd->hfi1_ibdev_dbg) {
 951                 pr_warn("create of %s failed\n", name);
 952                 return;
 953         }
 954         ibd->hfi1_ibdev_link =
 955                 debugfs_create_symlink(link, hfi1_dbg_root, name);
 956         if (!ibd->hfi1_ibdev_link) {
 957                 pr_warn("create of %s symlink failed\n", name);
 958                 return;
 959         }
 960         DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
 961         DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd);
 962         DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd);
 963         DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd);
 964         /* dev counter files */
 965         for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
 966                 DEBUGFS_FILE_CREATE(cntr_ops[i].name,
 967                                     ibd->hfi1_ibdev_dbg,
 968                                     dd,
 969                                     &cntr_ops[i].ops, S_IRUGO);
 970         /* per port files */
 971         for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
 972                 for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
 973                         snprintf(name,
 974                                  sizeof(name),
 975                                  port_cntr_ops[i].name,
 976                                  j + 1);
 977                         DEBUGFS_FILE_CREATE(name,
 978                                             ibd->hfi1_ibdev_dbg,
 979                                             ppd,
 980                                             &port_cntr_ops[i].ops,
 981                                             !port_cntr_ops[i].ops.write ?
 982                                             S_IRUGO : S_IRUGO | S_IWUSR);
 983                 }
 984 }
 985
 986 void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
 987 {
 988         if (!hfi1_dbg_root)
 989                 goto out;
 990         debugfs_remove(ibd->hfi1_ibdev_link);
 991         debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
 992 out:
 993         ibd->hfi1_ibdev_dbg = NULL;
 994 }
 995
 996 /*
 997  * driver stats field names, one line per stat, single string.  Used by
 998  * programs like hfistats to print the stats in a way which works for
 999  * different versions of drivers, without changing program source.
1000  * if hfi1_ib_stats changes, this needs to change.  Names need to be
1001  * 12 chars or less (w/o newline), for proper display by hfistats utility.
1002  */
1003 static const char * const hfi1_statnames[] = {
1004         /* must be element 0*/
1005         "KernIntr",
1006         "ErrorIntr",
1007         "Tx_Errs",
1008         "Rcv_Errs",
1009         "H/W_Errs",
1010         "NoPIOBufs",
1011         "CtxtsOpen",
1012         "RcvLen_Errs",
1013         "EgrBufFull",
1014         "EgrHdrFull"
1015 };
1016
1017 static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
1018 {
1019         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1020                 return NULL;
1021         return pos;
1022 }
1023
1024 static void *_driver_stats_names_seq_next(
1025         struct seq_file *s,
1026         void *v,
1027         loff_t *pos)
1028 {
1029         ++*pos;
1030         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1031                 return NULL;
1032         return pos;
1033 }
1034
1035 static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
1036 {
1037 }
1038
1039 static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
1040 {
1041         loff_t *spos = v;
1042
1043         seq_printf(s, "%s\n", hfi1_statnames[*spos]);
1044         return 0;
1045 }
1046
1047 DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
1048 DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
1049 DEBUGFS_FILE_OPS(driver_stats_names);
1050
1051 static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
1052 {
1053         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1054                 return NULL;
1055         return pos;
1056 }
1057
1058 static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
1059 {
1060         ++*pos;
1061         if (*pos >= ARRAY_SIZE(hfi1_statnames))
1062                 return NULL;
1063         return pos;
1064 }
1065
1066 static void _driver_stats_seq_stop(struct seq_file *s, void *v)
1067 {
1068 }
1069
1070 static u64 hfi1_sps_ints(void)
1071 {
1072         unsigned long flags;
1073         struct hfi1_devdata *dd;
1074         u64 sps_ints = 0;
1075
1076         spin_lock_irqsave(&hfi1_devs_lock, flags);
1077         list_for_each_entry(dd, &hfi1_dev_list, list) {
1078                 sps_ints += get_all_cpu_total(dd->int_counter);
1079         }
1080         spin_unlock_irqrestore(&hfi1_devs_lock, flags);
1081         return sps_ints;
1082 }
1083
1084 static int _driver_stats_seq_show(struct seq_file *s, void *v)
1085 {
1086         loff_t *spos = v;
1087         char *buffer;
1088         u64 *stats = (u64 *)&hfi1_stats;
1089         size_t sz = seq_get_buf(s, &buffer);
1090
1091         if (sz < sizeof(u64))
1092                 return SEQ_SKIP;
1093         /* special case for interrupts */
1094         if (*spos == 0)
1095                 *(u64 *)buffer = hfi1_sps_ints();
1096         else
1097                 *(u64 *)buffer = stats[*spos];
1098         seq_commit(s,  sizeof(u64));
1099         return 0;
1100 }
1101
1102 DEBUGFS_SEQ_FILE_OPS(driver_stats);
1103 DEBUGFS_SEQ_FILE_OPEN(driver_stats)
1104 DEBUGFS_FILE_OPS(driver_stats);
1105
1106 void hfi1_dbg_init(void)
1107 {
1108         hfi1_dbg_root  = debugfs_create_dir(DRIVER_NAME, NULL);
1109         if (!hfi1_dbg_root)
1110                 pr_warn("init of debugfs failed\n");
1111         DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL);
1112         DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL);
1113 }
1114
1115 void hfi1_dbg_exit(void)
1116 {
1117         debugfs_remove_recursive(hfi1_dbg_root);
1118         hfi1_dbg_root = NULL;
1119 }
1120
1121 #endif