drivers/misc/genwqe/card_debugfs.c

   1 /**
   2  * IBM Accelerator Family 'GenWQE'
   3  *
   4  * (C) Copyright IBM Corp. 2013
   5  *
   6  * Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
   7  * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
   8  * Author: Michael Jung <mijung@gmx.net>
   9  * Author: Michael Ruettger <michael@ibmra.de>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License (version 2 only)
  13  * as published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 /*
  22  * Debugfs interfaces for the GenWQE card. Help to debug potential
  23  * problems. Dump internal chip state for debugging and failure
  24  * determination.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/seq_file.h>
  31 #include <linux/uaccess.h>
  32
  33 #include "card_base.h"
  34 #include "card_ddcb.h"
  35
  36 #define GENWQE_DEBUGFS_RO(_name, _showfn)                               \
  37         static int genwqe_debugfs_##_name##_open(struct inode *inode,   \
  38                                                  struct file *file)     \
  39         {                                                               \
  40                 return single_open(file, _showfn, inode->i_private);    \
  41         }                                                               \
  42         static const struct file_operations genwqe_##_name##_fops = {   \
  43                 .open = genwqe_debugfs_##_name##_open,                  \
  44                 .read = seq_read,                                       \
  45                 .llseek = seq_lseek,                                    \
  46                 .release = single_release,                              \
  47         }
  48
  49 static void dbg_uidn_show(struct seq_file *s, struct genwqe_reg *regs,
  50                           int entries)
  51 {
  52         unsigned int i;
  53         u32 v_hi, v_lo;
  54
  55         for (i = 0; i < entries; i++) {
  56                 v_hi = (regs[i].val >> 32) & 0xffffffff;
  57                 v_lo = (regs[i].val)       & 0xffffffff;
  58
  59                 seq_printf(s, "  0x%08x 0x%08x 0x%08x 0x%08x EXT_ERR_REC\n",
  60                            regs[i].addr, regs[i].idx, v_hi, v_lo);
  61         }
  62 }
  63
  64 static int curr_dbg_uidn_show(struct seq_file *s, void *unused, int uid)
  65 {
  66         struct genwqe_dev *cd = s->private;
  67         int entries;
  68         struct genwqe_reg *regs;
  69
  70         entries = genwqe_ffdc_buff_size(cd, uid);
  71         if (entries < 0)
  72                 return -EINVAL;
  73
  74         if (entries == 0)
  75                 return 0;
  76
  77         regs = kcalloc(entries, sizeof(*regs), GFP_KERNEL);
  78         if (regs == NULL)
  79                 return -ENOMEM;
  80
  81         genwqe_stop_traps(cd); /* halt the traps while dumping data */
  82         genwqe_ffdc_buff_read(cd, uid, regs, entries);
  83         genwqe_start_traps(cd);
  84
  85         dbg_uidn_show(s, regs, entries);
  86         kfree(regs);
  87         return 0;
  88 }
  89
  90 static int genwqe_curr_dbg_uid0_show(struct seq_file *s, void *unused)
  91 {
  92         return curr_dbg_uidn_show(s, unused, 0);
  93 }
  94
  95 GENWQE_DEBUGFS_RO(curr_dbg_uid0, genwqe_curr_dbg_uid0_show);
  96
  97 static int genwqe_curr_dbg_uid1_show(struct seq_file *s, void *unused)
  98 {
  99         return curr_dbg_uidn_show(s, unused, 1);
 100 }
 101
 102 GENWQE_DEBUGFS_RO(curr_dbg_uid1, genwqe_curr_dbg_uid1_show);
 103
 104 static int genwqe_curr_dbg_uid2_show(struct seq_file *s, void *unused)
 105 {
 106         return curr_dbg_uidn_show(s, unused, 2);
 107 }
 108
 109 GENWQE_DEBUGFS_RO(curr_dbg_uid2, genwqe_curr_dbg_uid2_show);
 110
 111 static int prev_dbg_uidn_show(struct seq_file *s, void *unused, int uid)
 112 {
 113         struct genwqe_dev *cd = s->private;
 114
 115         dbg_uidn_show(s, cd->ffdc[uid].regs,  cd->ffdc[uid].entries);
 116         return 0;
 117 }
 118
 119 static int genwqe_prev_dbg_uid0_show(struct seq_file *s, void *unused)
 120 {
 121         return prev_dbg_uidn_show(s, unused, 0);
 122 }
 123
 124 GENWQE_DEBUGFS_RO(prev_dbg_uid0, genwqe_prev_dbg_uid0_show);
 125
 126 static int genwqe_prev_dbg_uid1_show(struct seq_file *s, void *unused)
 127 {
 128         return prev_dbg_uidn_show(s, unused, 1);
 129 }
 130
 131 GENWQE_DEBUGFS_RO(prev_dbg_uid1, genwqe_prev_dbg_uid1_show);
 132
 133 static int genwqe_prev_dbg_uid2_show(struct seq_file *s, void *unused)
 134 {
 135         return prev_dbg_uidn_show(s, unused, 2);
 136 }
 137
 138 GENWQE_DEBUGFS_RO(prev_dbg_uid2, genwqe_prev_dbg_uid2_show);
 139
 140 static int genwqe_curr_regs_show(struct seq_file *s, void *unused)
 141 {
 142         struct genwqe_dev *cd = s->private;
 143         unsigned int i;
 144         struct genwqe_reg *regs;
 145
 146         regs = kcalloc(GENWQE_FFDC_REGS, sizeof(*regs), GFP_KERNEL);
 147         if (regs == NULL)
 148                 return -ENOMEM;
 149
 150         genwqe_stop_traps(cd);
 151         genwqe_read_ffdc_regs(cd, regs, GENWQE_FFDC_REGS, 1);
 152         genwqe_start_traps(cd);
 153
 154         for (i = 0; i < GENWQE_FFDC_REGS; i++) {
 155                 if (regs[i].addr == 0xffffffff)
 156                         break;  /* invalid entries */
 157
 158                 if (regs[i].val == 0x0ull)
 159                         continue;  /* do not print 0x0 FIRs */
 160
 161                 seq_printf(s, "  0x%08x 0x%016llx\n",
 162                            regs[i].addr, regs[i].val);
 163         }
 164         return 0;
 165 }
 166
 167 GENWQE_DEBUGFS_RO(curr_regs, genwqe_curr_regs_show);
 168
 169 static int genwqe_prev_regs_show(struct seq_file *s, void *unused)
 170 {
 171         struct genwqe_dev *cd = s->private;
 172         unsigned int i;
 173         struct genwqe_reg *regs = cd->ffdc[GENWQE_DBG_REGS].regs;
 174
 175         if (regs == NULL)
 176                 return -EINVAL;
 177
 178         for (i = 0; i < GENWQE_FFDC_REGS; i++) {
 179                 if (regs[i].addr == 0xffffffff)
 180                         break;  /* invalid entries */
 181
 182                 if (regs[i].val == 0x0ull)
 183                         continue;  /* do not print 0x0 FIRs */
 184
 185                 seq_printf(s, "  0x%08x 0x%016llx\n",
 186                            regs[i].addr, regs[i].val);
 187         }
 188         return 0;
 189 }
 190
 191 GENWQE_DEBUGFS_RO(prev_regs, genwqe_prev_regs_show);
 192
 193 static int genwqe_jtimer_show(struct seq_file *s, void *unused)
 194 {
 195         struct genwqe_dev *cd = s->private;
 196         unsigned int vf_num;
 197         u64 jtimer;
 198
 199         jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT, 0);
 200         seq_printf(s, "  PF   0x%016llx %d msec\n", jtimer,
 201                    GENWQE_PF_JOBTIMEOUT_MSEC);
 202
 203         for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
 204                 jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT,
 205                                           vf_num + 1);
 206                 seq_printf(s, "  VF%-2d 0x%016llx %d msec\n", vf_num, jtimer,
 207                            cd->vf_jobtimeout_msec[vf_num]);
 208         }
 209         return 0;
 210 }
 211
 212 GENWQE_DEBUGFS_RO(jtimer, genwqe_jtimer_show);
 213
 214 static int genwqe_queue_working_time_show(struct seq_file *s, void *unused)
 215 {
 216         struct genwqe_dev *cd = s->private;
 217         unsigned int vf_num;
 218         u64 t;
 219
 220         t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, 0);
 221         seq_printf(s, "  PF   0x%016llx\n", t);
 222
 223         for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) {
 224                 t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, vf_num + 1);
 225                 seq_printf(s, "  VF%-2d 0x%016llx\n", vf_num, t);
 226         }
 227         return 0;
 228 }
 229
 230 GENWQE_DEBUGFS_RO(queue_working_time, genwqe_queue_working_time_show);
 231
 232 static int genwqe_ddcb_info_show(struct seq_file *s, void *unused)
 233 {
 234         struct genwqe_dev *cd = s->private;
 235         unsigned int i;
 236         struct ddcb_queue *queue;
 237         struct ddcb *pddcb;
 238
 239         queue = &cd->queue;
 240         seq_puts(s, "DDCB QUEUE:\n");
 241         seq_printf(s, "  ddcb_max:            %d\n"
 242                    "  ddcb_daddr:          %016llx - %016llx\n"
 243                    "  ddcb_vaddr:          %016llx\n"
 244                    "  ddcbs_in_flight:     %u\n"
 245                    "  ddcbs_max_in_flight: %u\n"
 246                    "  ddcbs_completed:     %u\n"
 247                    "  return_on_busy:      %u\n"
 248                    "  wait_on_busy:        %u\n"
 249                    "  irqs_processed:      %u\n",
 250                    queue->ddcb_max, (long long)queue->ddcb_daddr,
 251                    (long long)queue->ddcb_daddr +
 252                    (queue->ddcb_max * DDCB_LENGTH),
 253                    (long long)queue->ddcb_vaddr, queue->ddcbs_in_flight,
 254                    queue->ddcbs_max_in_flight, queue->ddcbs_completed,
 255                    queue->return_on_busy, queue->wait_on_busy,
 256                    cd->irqs_processed);
 257
 258         /* Hardware State */
 259         seq_printf(s, "  0x%08x 0x%016llx IO_QUEUE_CONFIG\n"
 260                    "  0x%08x 0x%016llx IO_QUEUE_STATUS\n"
 261                    "  0x%08x 0x%016llx IO_QUEUE_SEGMENT\n"
 262                    "  0x%08x 0x%016llx IO_QUEUE_INITSQN\n"
 263                    "  0x%08x 0x%016llx IO_QUEUE_WRAP\n"
 264                    "  0x%08x 0x%016llx IO_QUEUE_OFFSET\n"
 265                    "  0x%08x 0x%016llx IO_QUEUE_WTIME\n"
 266                    "  0x%08x 0x%016llx IO_QUEUE_ERRCNTS\n"
 267                    "  0x%08x 0x%016llx IO_QUEUE_LRW\n",
 268                    queue->IO_QUEUE_CONFIG,
 269                    __genwqe_readq(cd, queue->IO_QUEUE_CONFIG),
 270                    queue->IO_QUEUE_STATUS,
 271                    __genwqe_readq(cd, queue->IO_QUEUE_STATUS),
 272                    queue->IO_QUEUE_SEGMENT,
 273                    __genwqe_readq(cd, queue->IO_QUEUE_SEGMENT),
 274                    queue->IO_QUEUE_INITSQN,
 275                    __genwqe_readq(cd, queue->IO_QUEUE_INITSQN),
 276                    queue->IO_QUEUE_WRAP,
 277                    __genwqe_readq(cd, queue->IO_QUEUE_WRAP),
 278                    queue->IO_QUEUE_OFFSET,
 279                    __genwqe_readq(cd, queue->IO_QUEUE_OFFSET),
 280                    queue->IO_QUEUE_WTIME,
 281                    __genwqe_readq(cd, queue->IO_QUEUE_WTIME),
 282                    queue->IO_QUEUE_ERRCNTS,
 283                    __genwqe_readq(cd, queue->IO_QUEUE_ERRCNTS),
 284                    queue->IO_QUEUE_LRW,
 285                    __genwqe_readq(cd, queue->IO_QUEUE_LRW));
 286
 287         seq_printf(s, "DDCB list (ddcb_act=%d/ddcb_next=%d):\n",
 288                    queue->ddcb_act, queue->ddcb_next);
 289
 290         pddcb = queue->ddcb_vaddr;
 291         for (i = 0; i < queue->ddcb_max; i++) {
 292                 seq_printf(s, "  %-3d: RETC=%03x SEQ=%04x HSI/SHI=%02x/%02x ",
 293                            i, be16_to_cpu(pddcb->retc_16),
 294                            be16_to_cpu(pddcb->seqnum_16),
 295                            pddcb->hsi, pddcb->shi);
 296                 seq_printf(s, "PRIV=%06llx CMD=%02x\n",
 297                            be64_to_cpu(pddcb->priv_64), pddcb->cmd);
 298                 pddcb++;
 299         }
 300         return 0;
 301 }
 302
 303 GENWQE_DEBUGFS_RO(ddcb_info, genwqe_ddcb_info_show);
 304
 305 static int genwqe_info_show(struct seq_file *s, void *unused)
 306 {
 307         struct genwqe_dev *cd = s->private;
 308         u64 app_id, slu_id, bitstream = -1;
 309         struct pci_dev *pci_dev = cd->pci_dev;
 310
 311         slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG);
 312         app_id = __genwqe_readq(cd, IO_APP_UNITCFG);
 313
 314         if (genwqe_is_privileged(cd))
 315                 bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM);
 316
 317         seq_printf(s, "%s driver version: %s\n"
 318                    "    Device Name/Type: %s %s CardIdx: %d\n"
 319                    "    SLU/APP Config  : 0x%016llx/0x%016llx\n"
 320                    "    Build Date      : %u/%x/%u\n"
 321                    "    Base Clock      : %u MHz\n"
 322                    "    Arch/SVN Release: %u/%llx\n"
 323                    "    Bitstream       : %llx\n",
 324                    GENWQE_DEVNAME, DRV_VERSION, dev_name(&pci_dev->dev),
 325                    genwqe_is_privileged(cd) ?
 326                    "Physical" : "Virtual or no SR-IOV",
 327                    cd->card_idx, slu_id, app_id,
 328                    (u16)((slu_id >> 12) & 0x0fLLU),        /* month */
 329                    (u16)((slu_id >>  4) & 0xffLLU),        /* day */
 330                    (u16)((slu_id >> 16) & 0x0fLLU) + 2010, /* year */
 331                    genwqe_base_clock_frequency(cd),
 332                    (u16)((slu_id >> 32) & 0xffLLU), slu_id >> 40,
 333                    bitstream);
 334
 335         return 0;
 336 }
 337
 338 GENWQE_DEBUGFS_RO(info, genwqe_info_show);
 339
 340 int genwqe_init_debugfs(struct genwqe_dev *cd)
 341 {
 342         struct dentry *root;
 343         struct dentry *file;
 344         int ret;
 345         char card_name[64];
 346         char name[64];
 347         unsigned int i;
 348
 349         sprintf(card_name, "%s%d_card", GENWQE_DEVNAME, cd->card_idx);
 350
 351         root = debugfs_create_dir(card_name, cd->debugfs_genwqe);
 352         if (!root) {
 353                 ret = -ENOMEM;
 354                 goto err0;
 355         }
 356
 357         /* non privileged interfaces are done here */
 358         file = debugfs_create_file("ddcb_info", S_IRUGO, root, cd,
 359                                    &genwqe_ddcb_info_fops);
 360         if (!file) {
 361                 ret = -ENOMEM;
 362                 goto err1;
 363         }
 364
 365         file = debugfs_create_file("info", S_IRUGO, root, cd,
 366                                    &genwqe_info_fops);
 367         if (!file) {
 368                 ret = -ENOMEM;
 369                 goto err1;
 370         }
 371
 372         file = debugfs_create_x64("err_inject", 0666, root, &cd->err_inject);
 373         if (!file) {
 374                 ret = -ENOMEM;
 375                 goto err1;
 376         }
 377
 378         file = debugfs_create_u32("ddcb_software_timeout", 0666, root,
 379                                   &cd->ddcb_software_timeout);
 380         if (!file) {
 381                 ret = -ENOMEM;
 382                 goto err1;
 383         }
 384
 385         file = debugfs_create_u32("kill_timeout", 0666, root,
 386                                   &cd->kill_timeout);
 387         if (!file) {
 388                 ret = -ENOMEM;
 389                 goto err1;
 390         }
 391
 392         /* privileged interfaces follow here */
 393         if (!genwqe_is_privileged(cd)) {
 394                 cd->debugfs_root = root;
 395                 return 0;
 396         }
 397
 398         file = debugfs_create_file("curr_regs", S_IRUGO, root, cd,
 399                                    &genwqe_curr_regs_fops);
 400         if (!file) {
 401                 ret = -ENOMEM;
 402                 goto err1;
 403         }
 404
 405         file = debugfs_create_file("curr_dbg_uid0", S_IRUGO, root, cd,
 406                                    &genwqe_curr_dbg_uid0_fops);
 407         if (!file) {
 408                 ret = -ENOMEM;
 409                 goto err1;
 410         }
 411
 412         file = debugfs_create_file("curr_dbg_uid1", S_IRUGO, root, cd,
 413                                    &genwqe_curr_dbg_uid1_fops);
 414         if (!file) {
 415                 ret = -ENOMEM;
 416                 goto err1;
 417         }
 418
 419         file = debugfs_create_file("curr_dbg_uid2", S_IRUGO, root, cd,
 420                                    &genwqe_curr_dbg_uid2_fops);
 421         if (!file) {
 422                 ret = -ENOMEM;
 423                 goto err1;
 424         }
 425
 426         file = debugfs_create_file("prev_regs", S_IRUGO, root, cd,
 427                                    &genwqe_prev_regs_fops);
 428         if (!file) {
 429                 ret = -ENOMEM;
 430                 goto err1;
 431         }
 432
 433         file = debugfs_create_file("prev_dbg_uid0", S_IRUGO, root, cd,
 434                                    &genwqe_prev_dbg_uid0_fops);
 435         if (!file) {
 436                 ret = -ENOMEM;
 437                 goto err1;
 438         }
 439
 440         file = debugfs_create_file("prev_dbg_uid1", S_IRUGO, root, cd,
 441                                    &genwqe_prev_dbg_uid1_fops);
 442         if (!file) {
 443                 ret = -ENOMEM;
 444                 goto err1;
 445         }
 446
 447         file = debugfs_create_file("prev_dbg_uid2", S_IRUGO, root, cd,
 448                                    &genwqe_prev_dbg_uid2_fops);
 449         if (!file) {
 450                 ret = -ENOMEM;
 451                 goto err1;
 452         }
 453
 454         for (i = 0; i <  GENWQE_MAX_VFS; i++) {
 455                 sprintf(name, "vf%u_jobtimeout_msec", i);
 456
 457                 file = debugfs_create_u32(name, 0666, root,
 458                                           &cd->vf_jobtimeout_msec[i]);
 459                 if (!file) {
 460                         ret = -ENOMEM;
 461                         goto err1;
 462                 }
 463         }
 464
 465         file = debugfs_create_file("jobtimer", S_IRUGO, root, cd,
 466                                    &genwqe_jtimer_fops);
 467         if (!file) {
 468                 ret = -ENOMEM;
 469                 goto err1;
 470         }
 471
 472         file = debugfs_create_file("queue_working_time", S_IRUGO, root, cd,
 473                                    &genwqe_queue_working_time_fops);
 474         if (!file) {
 475                 ret = -ENOMEM;
 476                 goto err1;
 477         }
 478
 479         file = debugfs_create_u32("skip_recovery", 0666, root,
 480                                   &cd->skip_recovery);
 481         if (!file) {
 482                 ret = -ENOMEM;
 483                 goto err1;
 484         }
 485
 486         file = debugfs_create_u32("use_platform_recovery", 0666, root,
 487                                   &cd->use_platform_recovery);
 488         if (!file) {
 489                 ret = -ENOMEM;
 490                 goto err1;
 491         }
 492
 493         cd->debugfs_root = root;
 494         return 0;
 495 err1:
 496         debugfs_remove_recursive(root);
 497 err0:
 498         return ret;
 499 }
 500
 501 void genqwe_exit_debugfs(struct genwqe_dev *cd)
 502 {
 503         debugfs_remove_recursive(cd->debugfs_root);
 504 }