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