drivers/scsi/qedf/qedf_debugfs.c

   1 /*
   2  *  QLogic FCoE Offload Driver
   3  *  Copyright (c) 2016-2018 QLogic Corporation
   4  *
   5  *  This software is available under the terms of the GNU General Public License
   6  *  (GPL) Version 2, available from the file COPYING in the main directory of
   7  *  this source tree.
   8  */
   9 #ifdef CONFIG_DEBUG_FS
  10
  11 #include <linux/uaccess.h>
  12 #include <linux/debugfs.h>
  13 #include <linux/module.h>
  14
  15 #include "qedf.h"
  16 #include "qedf_dbg.h"
  17
  18 static struct dentry *qedf_dbg_root;
  19
  20 /**
  21  * qedf_dbg_host_init - setup the debugfs file for the pf
  22  * @pf: the pf that is starting up
  23  **/
  24 void
  25 qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
  26                     const struct qedf_debugfs_ops *dops,
  27                     const struct file_operations *fops)
  28 {
  29         char host_dirname[32];
  30         struct dentry *file_dentry = NULL;
  31
  32         QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n");
  33         /* create pf dir */
  34         sprintf(host_dirname, "host%u", qedf->host_no);
  35         qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root);
  36         if (!qedf->bdf_dentry)
  37                 return;
  38
  39         /* create debugfs files */
  40         while (dops) {
  41                 if (!(dops->name))
  42                         break;
  43
  44                 file_dentry = debugfs_create_file(dops->name, 0600,
  45                                                   qedf->bdf_dentry, qedf,
  46                                                   fops);
  47                 if (!file_dentry) {
  48                         QEDF_INFO(qedf, QEDF_LOG_DEBUGFS,
  49                                    "Debugfs entry %s creation failed\n",
  50                                    dops->name);
  51                         debugfs_remove_recursive(qedf->bdf_dentry);
  52                         return;
  53                 }
  54                 dops++;
  55                 fops++;
  56         }
  57 }
  58
  59 /**
  60  * qedf_dbg_host_exit - clear out the pf's debugfs entries
  61  * @pf: the pf that is stopping
  62  **/
  63 void
  64 qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf)
  65 {
  66         QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
  67                    "entry\n");
  68         /* remove debugfs  entries of this PF */
  69         debugfs_remove_recursive(qedf->bdf_dentry);
  70         qedf->bdf_dentry = NULL;
  71 }
  72
  73 /**
  74  * qedf_dbg_init - start up debugfs for the driver
  75  **/
  76 void
  77 qedf_dbg_init(char *drv_name)
  78 {
  79         QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");
  80
  81         /* create qed dir in root of debugfs. NULL means debugfs root */
  82         qedf_dbg_root = debugfs_create_dir(drv_name, NULL);
  83         if (!qedf_dbg_root)
  84                 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Init of debugfs "
  85                            "failed\n");
  86 }
  87
  88 /**
  89  * qedf_dbg_exit - clean out the driver's debugfs entries
  90  **/
  91 void
  92 qedf_dbg_exit(void)
  93 {
  94         QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "
  95                    "entry\n");
  96
  97         /* remove qed dir in root of debugfs */
  98         debugfs_remove_recursive(qedf_dbg_root);
  99         qedf_dbg_root = NULL;
 100 }
 101
 102 const struct qedf_debugfs_ops qedf_debugfs_ops[] = {
 103         { "fp_int", NULL },
 104         { "io_trace", NULL },
 105         { "debug", NULL },
 106         { "stop_io_on_error", NULL},
 107         { "driver_stats", NULL},
 108         { "clear_stats", NULL},
 109         { "offload_stats", NULL},
 110         /* This must be last */
 111         { NULL, NULL }
 112 };
 113
 114 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);
 115
 116 static ssize_t
 117 qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,
 118                          loff_t *ppos)
 119 {
 120         size_t cnt = 0;
 121         int id;
 122         struct qedf_fastpath *fp = NULL;
 123         struct qedf_dbg_ctx *qedf_dbg =
 124                                 (struct qedf_dbg_ctx *)filp->private_data;
 125         struct qedf_ctx *qedf = container_of(qedf_dbg,
 126             struct qedf_ctx, dbg_ctx);
 127
 128         QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
 129
 130         cnt = sprintf(buffer, "\nFastpath I/O completions\n\n");
 131
 132         for (id = 0; id < qedf->num_queues; id++) {
 133                 fp = &(qedf->fp_array[id]);
 134                 if (fp->sb_id == QEDF_SB_ID_NULL)
 135                         continue;
 136                 cnt += sprintf((buffer + cnt), "#%d: %lu\n", id,
 137                                fp->completions);
 138         }
 139
 140         cnt = min_t(int, count, cnt - *ppos);
 141         *ppos += cnt;
 142         return cnt;
 143 }
 144
 145 static ssize_t
 146 qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer,
 147                           size_t count, loff_t *ppos)
 148 {
 149         if (!count || *ppos)
 150                 return 0;
 151
 152         return count;
 153 }
 154
 155 static ssize_t
 156 qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count,
 157                         loff_t *ppos)
 158 {
 159         int cnt;
 160         struct qedf_dbg_ctx *qedf =
 161                                 (struct qedf_dbg_ctx *)filp->private_data;
 162
 163         QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n");
 164         cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug);
 165
 166         cnt = min_t(int, count, cnt - *ppos);
 167         *ppos += cnt;
 168         return cnt;
 169 }
 170
 171 static ssize_t
 172 qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,
 173                          size_t count, loff_t *ppos)
 174 {
 175         uint32_t val;
 176         void *kern_buf;
 177         int rval;
 178         struct qedf_dbg_ctx *qedf =
 179             (struct qedf_dbg_ctx *)filp->private_data;
 180
 181         if (!count || *ppos)
 182                 return 0;
 183
 184         kern_buf = memdup_user(buffer, count);
 185         if (IS_ERR(kern_buf))
 186                 return PTR_ERR(kern_buf);
 187
 188         rval = kstrtouint(kern_buf, 10, &val);
 189         kfree(kern_buf);
 190         if (rval)
 191                 return rval;
 192
 193         if (val == 1)
 194                 qedf_debug = QEDF_DEFAULT_LOG_MASK;
 195         else
 196                 qedf_debug = val;
 197
 198         QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);
 199         return count;
 200 }
 201
 202 static ssize_t
 203 qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer,
 204                                    size_t count, loff_t *ppos)
 205 {
 206         int cnt;
 207         struct qedf_dbg_ctx *qedf_dbg =
 208                                 (struct qedf_dbg_ctx *)filp->private_data;
 209         struct qedf_ctx *qedf = container_of(qedf_dbg,
 210             struct qedf_ctx, dbg_ctx);
 211
 212         QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
 213         cnt = sprintf(buffer, "%s\n",
 214             qedf->stop_io_on_error ? "true" : "false");
 215
 216         cnt = min_t(int, count, cnt - *ppos);
 217         *ppos += cnt;
 218         return cnt;
 219 }
 220
 221 static ssize_t
 222 qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,
 223                                     const char __user *buffer, size_t count,
 224                                     loff_t *ppos)
 225 {
 226         void *kern_buf;
 227         struct qedf_dbg_ctx *qedf_dbg =
 228                                 (struct qedf_dbg_ctx *)filp->private_data;
 229         struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
 230             dbg_ctx);
 231
 232         QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
 233
 234         if (!count || *ppos)
 235                 return 0;
 236
 237         kern_buf = memdup_user(buffer, 6);
 238         if (IS_ERR(kern_buf))
 239                 return PTR_ERR(kern_buf);
 240
 241         if (strncmp(kern_buf, "false", 5) == 0)
 242                 qedf->stop_io_on_error = false;
 243         else if (strncmp(kern_buf, "true", 4) == 0)
 244                 qedf->stop_io_on_error = true;
 245         else if (strncmp(kern_buf, "now", 3) == 0)
 246                 /* Trigger from user to stop all I/O on this host */
 247                 set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
 248
 249         kfree(kern_buf);
 250         return count;
 251 }
 252
 253 static int
 254 qedf_io_trace_show(struct seq_file *s, void *unused)
 255 {
 256         int i, idx = 0;
 257         struct qedf_ctx *qedf = s->private;
 258         struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;
 259         struct qedf_io_log *io_log;
 260         unsigned long flags;
 261
 262         if (!qedf_io_tracing) {
 263                 seq_puts(s, "I/O tracing not enabled.\n");
 264                 goto out;
 265         }
 266
 267         QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
 268
 269         spin_lock_irqsave(&qedf->io_trace_lock, flags);
 270         idx = qedf->io_trace_idx;
 271         for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {
 272                 io_log = &qedf->io_trace_buf[idx];
 273                 seq_printf(s, "%d:", io_log->direction);
 274                 seq_printf(s, "0x%x:", io_log->task_id);
 275                 seq_printf(s, "0x%06x:", io_log->port_id);
 276                 seq_printf(s, "%d:", io_log->lun);
 277                 seq_printf(s, "0x%02x:", io_log->op);
 278                 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
 279                     io_log->lba[1], io_log->lba[2], io_log->lba[3]);
 280                 seq_printf(s, "%d:", io_log->bufflen);
 281                 seq_printf(s, "%d:", io_log->sg_count);
 282                 seq_printf(s, "0x%08x:", io_log->result);
 283                 seq_printf(s, "%lu:", io_log->jiffies);
 284                 seq_printf(s, "%d:", io_log->refcount);
 285                 seq_printf(s, "%d:", io_log->req_cpu);
 286                 seq_printf(s, "%d:", io_log->int_cpu);
 287                 seq_printf(s, "%d:", io_log->rsp_cpu);
 288                 seq_printf(s, "%d\n", io_log->sge_type);
 289
 290                 idx++;
 291                 if (idx == QEDF_IO_TRACE_SIZE)
 292                         idx = 0;
 293         }
 294         spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
 295
 296 out:
 297         return 0;
 298 }
 299
 300 static int
 301 qedf_dbg_io_trace_open(struct inode *inode, struct file *file)
 302 {
 303         struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
 304         struct qedf_ctx *qedf = container_of(qedf_dbg,
 305             struct qedf_ctx, dbg_ctx);
 306
 307         return single_open(file, qedf_io_trace_show, qedf);
 308 }
 309
 310 static int
 311 qedf_driver_stats_show(struct seq_file *s, void *unused)
 312 {
 313         struct qedf_ctx *qedf = s->private;
 314         struct qedf_rport *fcport;
 315         struct fc_rport_priv *rdata;
 316
 317         seq_printf(s, "cmg_mgr free io_reqs: %d\n",
 318             atomic_read(&qedf->cmd_mgr->free_list_cnt));
 319         seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);
 320         seq_printf(s, "single SGEs: %d\n", qedf->single_sge_ios);
 321         seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);
 322
 323         seq_puts(s, "Offloaded ports:\n\n");
 324
 325         rcu_read_lock();
 326         list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
 327                 rdata = fcport->rdata;
 328                 if (rdata == NULL)
 329                         continue;
 330                 seq_printf(s, "%06x: free_sqes: %d, num_active_ios: %d\n",
 331                     rdata->ids.port_id, atomic_read(&fcport->free_sqes),
 332                     atomic_read(&fcport->num_active_ios));
 333         }
 334         rcu_read_unlock();
 335
 336         return 0;
 337 }
 338
 339 static int
 340 qedf_dbg_driver_stats_open(struct inode *inode, struct file *file)
 341 {
 342         struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
 343         struct qedf_ctx *qedf = container_of(qedf_dbg,
 344             struct qedf_ctx, dbg_ctx);
 345
 346         return single_open(file, qedf_driver_stats_show, qedf);
 347 }
 348
 349 static ssize_t
 350 qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer,
 351                                    size_t count, loff_t *ppos)
 352 {
 353         int cnt = 0;
 354
 355         /* Essentially a read stub */
 356         cnt = min_t(int, count, cnt - *ppos);
 357         *ppos += cnt;
 358         return cnt;
 359 }
 360
 361 static ssize_t
 362 qedf_dbg_clear_stats_cmd_write(struct file *filp,
 363                                     const char __user *buffer, size_t count,
 364                                     loff_t *ppos)
 365 {
 366         struct qedf_dbg_ctx *qedf_dbg =
 367                                 (struct qedf_dbg_ctx *)filp->private_data;
 368         struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
 369             dbg_ctx);
 370
 371         QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");
 372
 373         if (!count || *ppos)
 374                 return 0;
 375
 376         /* Clear stat counters exposed by 'stats' node */
 377         qedf->slow_sge_ios = 0;
 378         qedf->single_sge_ios = 0;
 379         qedf->fast_sge_ios = 0;
 380
 381         return count;
 382 }
 383
 384 static int
 385 qedf_offload_stats_show(struct seq_file *s, void *unused)
 386 {
 387         struct qedf_ctx *qedf = s->private;
 388         struct qed_fcoe_stats *fw_fcoe_stats;
 389
 390         fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
 391         if (!fw_fcoe_stats) {
 392                 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
 393                     "fw_fcoe_stats.\n");
 394                 goto out;
 395         }
 396
 397         /* Query firmware for offload stats */
 398         qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
 399
 400         seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"
 401             "fcoe_rx_data_pkt_cnt=%llu\n"
 402             "fcoe_rx_xfer_pkt_cnt=%llu\n"
 403             "fcoe_rx_other_pkt_cnt=%llu\n"
 404             "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"
 405             "fcoe_silent_drop_pkt_crc_error_cnt=%u\n"
 406             "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"
 407             "fcoe_silent_drop_total_pkt_cnt=%u\n"
 408             "fcoe_silent_drop_pkt_rq_full_cnt=%u\n"
 409             "fcoe_tx_byte_cnt=%llu\n"
 410             "fcoe_tx_data_pkt_cnt=%llu\n"
 411             "fcoe_tx_xfer_pkt_cnt=%llu\n"
 412             "fcoe_tx_other_pkt_cnt=%llu\n",
 413             fw_fcoe_stats->fcoe_rx_byte_cnt,
 414             fw_fcoe_stats->fcoe_rx_data_pkt_cnt,
 415             fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,
 416             fw_fcoe_stats->fcoe_rx_other_pkt_cnt,
 417             fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,
 418             fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,
 419             fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,
 420             fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,
 421             fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,
 422             fw_fcoe_stats->fcoe_tx_byte_cnt,
 423             fw_fcoe_stats->fcoe_tx_data_pkt_cnt,
 424             fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,
 425             fw_fcoe_stats->fcoe_tx_other_pkt_cnt);
 426
 427         kfree(fw_fcoe_stats);
 428 out:
 429         return 0;
 430 }
 431
 432 static int
 433 qedf_dbg_offload_stats_open(struct inode *inode, struct file *file)
 434 {
 435         struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
 436         struct qedf_ctx *qedf = container_of(qedf_dbg,
 437             struct qedf_ctx, dbg_ctx);
 438
 439         return single_open(file, qedf_offload_stats_show, qedf);
 440 }
 441
 442 const struct file_operations qedf_dbg_fops[] = {
 443         qedf_dbg_fileops(qedf, fp_int),
 444         qedf_dbg_fileops_seq(qedf, io_trace),
 445         qedf_dbg_fileops(qedf, debug),
 446         qedf_dbg_fileops(qedf, stop_io_on_error),
 447         qedf_dbg_fileops_seq(qedf, driver_stats),
 448         qedf_dbg_fileops(qedf, clear_stats),
 449         qedf_dbg_fileops_seq(qedf, offload_stats),
 450         /* This must be last */
 451         { },
 452 };
 453
 454 #else /* CONFIG_DEBUG_FS */
 455 void qedf_dbg_host_init(struct qedf_dbg_ctx *);
 456 void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
 457 void qedf_dbg_init(char *);
 458 void qedf_dbg_exit(void);
 459 #endif /* CONFIG_DEBUG_FS */