1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic FCoE Offload Driver
4 * Copyright (c) 2016-2018 QLogic Corporation
5 */
6 #ifdef CONFIG_DEBUG_FS
7
8 #include <linux/uaccess.h>
9 #include <linux/debugfs.h>
10 #include <linux/module.h>
11
12 #include "qedf.h"
13 #include "qedf_dbg.h"
14
15 static struct dentry *qedf_dbg_root;
16
17 /*
18 * qedf_dbg_host_init - setup the debugfs file for the pf
19 */
20 void
qedf_dbg_host_init(struct qedf_dbg_ctx * qedf,const struct qedf_debugfs_ops * dops,const struct file_operations * fops)21 qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
22 const struct qedf_debugfs_ops *dops,
23 const struct file_operations *fops)
24 {
25 char host_dirname[32];
26
27 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n");
28 /* create pf dir */
29 sprintf(host_dirname, "host%u", qedf->host_no);
30 qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root);
31
32 /* create debugfs files */
33 while (dops) {
34 if (!(dops->name))
35 break;
36
37 debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf,
38 fops);
39 dops++;
40 fops++;
41 }
42 }
43
44 /*
45 * qedf_dbg_host_exit - clear out the pf's debugfs entries
46 */
47 void
qedf_dbg_host_exit(struct qedf_dbg_ctx * qedf_dbg)48 qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf_dbg)
49 {
50 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
51 "entry\n");
52 /* remove debugfs entries of this PF */
53 debugfs_remove_recursive(qedf_dbg->bdf_dentry);
54 qedf_dbg->bdf_dentry = NULL;
55 }
56
57 /*
58 * qedf_dbg_init - start up debugfs for the driver
59 */
60 void
qedf_dbg_init(char * drv_name)61 qedf_dbg_init(char *drv_name)
62 {
63 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");
64
65 /* create qed dir in root of debugfs. NULL means debugfs root */
66 qedf_dbg_root = debugfs_create_dir(drv_name, NULL);
67 }
68
69 /*
70 * qedf_dbg_exit - clean out the driver's debugfs entries
71 */
72 void
qedf_dbg_exit(void)73 qedf_dbg_exit(void)
74 {
75 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "
76 "entry\n");
77
78 /* remove qed dir in root of debugfs */
79 debugfs_remove_recursive(qedf_dbg_root);
80 qedf_dbg_root = NULL;
81 }
82
83 const struct qedf_debugfs_ops qedf_debugfs_ops[] = {
84 { "fp_int", NULL },
85 { "io_trace", NULL },
86 { "debug", NULL },
87 { "stop_io_on_error", NULL},
88 { "driver_stats", NULL},
89 { "clear_stats", NULL},
90 { "offload_stats", NULL},
91 /* This must be last */
92 { NULL, NULL }
93 };
94
95 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);
96
97 static ssize_t
qedf_dbg_fp_int_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)98 qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,
99 loff_t *ppos)
100 {
101 size_t cnt = 0;
102 int id;
103 struct qedf_fastpath *fp = NULL;
104 struct qedf_dbg_ctx *qedf_dbg =
105 (struct qedf_dbg_ctx *)filp->private_data;
106 struct qedf_ctx *qedf = container_of(qedf_dbg,
107 struct qedf_ctx, dbg_ctx);
108
109 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
110
111 cnt = sprintf(buffer, "\nFastpath I/O completions\n\n");
112
113 for (id = 0; id < qedf->num_queues; id++) {
114 fp = &(qedf->fp_array[id]);
115 if (fp->sb_id == QEDF_SB_ID_NULL)
116 continue;
117 cnt += sprintf((buffer + cnt), "#%d: %lu\n", id,
118 fp->completions);
119 }
120
121 cnt = min_t(int, count, cnt - *ppos);
122 *ppos += cnt;
123 return cnt;
124 }
125
126 static ssize_t
qedf_dbg_fp_int_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)127 qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer,
128 size_t count, loff_t *ppos)
129 {
130 if (!count || *ppos)
131 return 0;
132
133 return count;
134 }
135
136 static ssize_t
qedf_dbg_debug_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)137 qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count,
138 loff_t *ppos)
139 {
140 int cnt;
141 struct qedf_dbg_ctx *qedf_dbg =
142 (struct qedf_dbg_ctx *)filp->private_data;
143
144 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "debug mask=0x%x\n", qedf_debug);
145 cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug);
146
147 cnt = min_t(int, count, cnt - *ppos);
148 *ppos += cnt;
149 return cnt;
150 }
151
152 static ssize_t
qedf_dbg_debug_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)153 qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,
154 size_t count, loff_t *ppos)
155 {
156 uint32_t val;
157 void *kern_buf;
158 int rval;
159 struct qedf_dbg_ctx *qedf_dbg =
160 (struct qedf_dbg_ctx *)filp->private_data;
161
162 if (!count || *ppos)
163 return 0;
164
165 kern_buf = memdup_user(buffer, count);
166 if (IS_ERR(kern_buf))
167 return PTR_ERR(kern_buf);
168
169 rval = kstrtouint(kern_buf, 10, &val);
170 kfree(kern_buf);
171 if (rval)
172 return rval;
173
174 if (val == 1)
175 qedf_debug = QEDF_DEFAULT_LOG_MASK;
176 else
177 qedf_debug = val;
178
179 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);
180 return count;
181 }
182
183 static ssize_t
qedf_dbg_stop_io_on_error_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)184 qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer,
185 size_t count, loff_t *ppos)
186 {
187 int cnt;
188 struct qedf_dbg_ctx *qedf_dbg =
189 (struct qedf_dbg_ctx *)filp->private_data;
190 struct qedf_ctx *qedf = container_of(qedf_dbg,
191 struct qedf_ctx, dbg_ctx);
192
193 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
194 cnt = sprintf(buffer, "%s\n",
195 qedf->stop_io_on_error ? "true" : "false");
196
197 cnt = min_t(int, count, cnt - *ppos);
198 *ppos += cnt;
199 return cnt;
200 }
201
202 static ssize_t
qedf_dbg_stop_io_on_error_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)203 qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,
204 const char __user *buffer, size_t count,
205 loff_t *ppos)
206 {
207 void *kern_buf;
208 struct qedf_dbg_ctx *qedf_dbg =
209 (struct qedf_dbg_ctx *)filp->private_data;
210 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
211 dbg_ctx);
212
213 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
214
215 if (!count || *ppos)
216 return 0;
217
218 kern_buf = memdup_user(buffer, 6);
219 if (IS_ERR(kern_buf))
220 return PTR_ERR(kern_buf);
221
222 if (strncmp(kern_buf, "false", 5) == 0)
223 qedf->stop_io_on_error = false;
224 else if (strncmp(kern_buf, "true", 4) == 0)
225 qedf->stop_io_on_error = true;
226 else if (strncmp(kern_buf, "now", 3) == 0)
227 /* Trigger from user to stop all I/O on this host */
228 set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
229
230 kfree(kern_buf);
231 return count;
232 }
233
234 static int
qedf_io_trace_show(struct seq_file * s,void * unused)235 qedf_io_trace_show(struct seq_file *s, void *unused)
236 {
237 int i, idx = 0;
238 struct qedf_ctx *qedf = s->private;
239 struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;
240 struct qedf_io_log *io_log;
241 unsigned long flags;
242
243 if (!qedf_io_tracing) {
244 seq_puts(s, "I/O tracing not enabled.\n");
245 goto out;
246 }
247
248 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
249
250 spin_lock_irqsave(&qedf->io_trace_lock, flags);
251 idx = qedf->io_trace_idx;
252 for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {
253 io_log = &qedf->io_trace_buf[idx];
254 seq_printf(s, "%d:", io_log->direction);
255 seq_printf(s, "0x%x:", io_log->task_id);
256 seq_printf(s, "0x%06x:", io_log->port_id);
257 seq_printf(s, "%d:", io_log->lun);
258 seq_printf(s, "0x%02x:", io_log->op);
259 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
260 io_log->lba[1], io_log->lba[2], io_log->lba[3]);
261 seq_printf(s, "%d:", io_log->bufflen);
262 seq_printf(s, "%d:", io_log->sg_count);
263 seq_printf(s, "0x%08x:", io_log->result);
264 seq_printf(s, "%lu:", io_log->jiffies);
265 seq_printf(s, "%d:", io_log->refcount);
266 seq_printf(s, "%d:", io_log->req_cpu);
267 seq_printf(s, "%d:", io_log->int_cpu);
268 seq_printf(s, "%d:", io_log->rsp_cpu);
269 seq_printf(s, "%d\n", io_log->sge_type);
270
271 idx++;
272 if (idx == QEDF_IO_TRACE_SIZE)
273 idx = 0;
274 }
275 spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
276
277 out:
278 return 0;
279 }
280
281 static int
qedf_dbg_io_trace_open(struct inode * inode,struct file * file)282 qedf_dbg_io_trace_open(struct inode *inode, struct file *file)
283 {
284 struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
285 struct qedf_ctx *qedf = container_of(qedf_dbg,
286 struct qedf_ctx, dbg_ctx);
287
288 return single_open(file, qedf_io_trace_show, qedf);
289 }
290
291 /* Based on fip_state enum from libfcoe.h */
292 static char *fip_state_names[] = {
293 "FIP_ST_DISABLED",
294 "FIP_ST_LINK_WAIT",
295 "FIP_ST_AUTO",
296 "FIP_ST_NON_FIP",
297 "FIP_ST_ENABLED",
298 "FIP_ST_VNMP_START",
299 "FIP_ST_VNMP_PROBE1",
300 "FIP_ST_VNMP_PROBE2",
301 "FIP_ST_VNMP_CLAIM",
302 "FIP_ST_VNMP_UP",
303 };
304
305 /* Based on fc_rport_state enum from libfc.h */
306 static char *fc_rport_state_names[] = {
307 "RPORT_ST_INIT",
308 "RPORT_ST_FLOGI",
309 "RPORT_ST_PLOGI_WAIT",
310 "RPORT_ST_PLOGI",
311 "RPORT_ST_PRLI",
312 "RPORT_ST_RTV",
313 "RPORT_ST_READY",
314 "RPORT_ST_ADISC",
315 "RPORT_ST_DELETE",
316 };
317
318 static int
qedf_driver_stats_show(struct seq_file * s,void * unused)319 qedf_driver_stats_show(struct seq_file *s, void *unused)
320 {
321 struct qedf_ctx *qedf = s->private;
322 struct qedf_rport *fcport;
323 struct fc_rport_priv *rdata;
324
325 seq_printf(s, "Host WWNN/WWPN: %016llx/%016llx\n",
326 qedf->wwnn, qedf->wwpn);
327 seq_printf(s, "Host NPortID: %06x\n", qedf->lport->port_id);
328 seq_printf(s, "Link State: %s\n", atomic_read(&qedf->link_state) ?
329 "Up" : "Down");
330 seq_printf(s, "Logical Link State: %s\n", qedf->lport->link_up ?
331 "Up" : "Down");
332 seq_printf(s, "FIP state: %s\n", fip_state_names[qedf->ctlr.state]);
333 seq_printf(s, "FIP VLAN ID: %d\n", qedf->vlan_id & 0xfff);
334 seq_printf(s, "FIP 802.1Q Priority: %d\n", qedf->prio);
335 if (qedf->ctlr.sel_fcf) {
336 seq_printf(s, "FCF WWPN: %016llx\n",
337 qedf->ctlr.sel_fcf->switch_name);
338 seq_printf(s, "FCF MAC: %pM\n", qedf->ctlr.sel_fcf->fcf_mac);
339 } else {
340 seq_puts(s, "FCF not selected\n");
341 }
342
343 seq_puts(s, "\nSGE stats:\n\n");
344 seq_printf(s, "cmg_mgr free io_reqs: %d\n",
345 atomic_read(&qedf->cmd_mgr->free_list_cnt));
346 seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);
347 seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);
348
349 seq_puts(s, "Offloaded ports:\n\n");
350
351 rcu_read_lock();
352 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
353 rdata = fcport->rdata;
354 if (rdata == NULL)
355 continue;
356 seq_printf(s, "%016llx/%016llx/%06x: state=%s, free_sqes=%d, num_active_ios=%d\n",
357 rdata->rport->node_name, rdata->rport->port_name,
358 rdata->ids.port_id,
359 fc_rport_state_names[rdata->rp_state],
360 atomic_read(&fcport->free_sqes),
361 atomic_read(&fcport->num_active_ios));
362 }
363 rcu_read_unlock();
364
365 return 0;
366 }
367
368 static int
qedf_dbg_driver_stats_open(struct inode * inode,struct file * file)369 qedf_dbg_driver_stats_open(struct inode *inode, struct file *file)
370 {
371 struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
372 struct qedf_ctx *qedf = container_of(qedf_dbg,
373 struct qedf_ctx, dbg_ctx);
374
375 return single_open(file, qedf_driver_stats_show, qedf);
376 }
377
378 static ssize_t
qedf_dbg_clear_stats_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)379 qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer,
380 size_t count, loff_t *ppos)
381 {
382 int cnt = 0;
383
384 /* Essentially a read stub */
385 cnt = min_t(int, count, cnt - *ppos);
386 *ppos += cnt;
387 return cnt;
388 }
389
390 static ssize_t
qedf_dbg_clear_stats_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)391 qedf_dbg_clear_stats_cmd_write(struct file *filp,
392 const char __user *buffer, size_t count,
393 loff_t *ppos)
394 {
395 struct qedf_dbg_ctx *qedf_dbg =
396 (struct qedf_dbg_ctx *)filp->private_data;
397 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
398 dbg_ctx);
399
400 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");
401
402 if (!count || *ppos)
403 return 0;
404
405 /* Clear stat counters exposed by 'stats' node */
406 qedf->slow_sge_ios = 0;
407 qedf->fast_sge_ios = 0;
408
409 return count;
410 }
411
412 static int
qedf_offload_stats_show(struct seq_file * s,void * unused)413 qedf_offload_stats_show(struct seq_file *s, void *unused)
414 {
415 struct qedf_ctx *qedf = s->private;
416 struct qed_fcoe_stats *fw_fcoe_stats;
417
418 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
419 if (!fw_fcoe_stats) {
420 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
421 "fw_fcoe_stats.\n");
422 goto out;
423 }
424
425 /* Query firmware for offload stats */
426 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
427
428 seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"
429 "fcoe_rx_data_pkt_cnt=%llu\n"
430 "fcoe_rx_xfer_pkt_cnt=%llu\n"
431 "fcoe_rx_other_pkt_cnt=%llu\n"
432 "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"
433 "fcoe_silent_drop_pkt_crc_error_cnt=%u\n"
434 "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"
435 "fcoe_silent_drop_total_pkt_cnt=%u\n"
436 "fcoe_silent_drop_pkt_rq_full_cnt=%u\n"
437 "fcoe_tx_byte_cnt=%llu\n"
438 "fcoe_tx_data_pkt_cnt=%llu\n"
439 "fcoe_tx_xfer_pkt_cnt=%llu\n"
440 "fcoe_tx_other_pkt_cnt=%llu\n",
441 fw_fcoe_stats->fcoe_rx_byte_cnt,
442 fw_fcoe_stats->fcoe_rx_data_pkt_cnt,
443 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,
444 fw_fcoe_stats->fcoe_rx_other_pkt_cnt,
445 fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,
446 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,
447 fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,
448 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,
449 fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,
450 fw_fcoe_stats->fcoe_tx_byte_cnt,
451 fw_fcoe_stats->fcoe_tx_data_pkt_cnt,
452 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,
453 fw_fcoe_stats->fcoe_tx_other_pkt_cnt);
454
455 kfree(fw_fcoe_stats);
456 out:
457 return 0;
458 }
459
460 static int
qedf_dbg_offload_stats_open(struct inode * inode,struct file * file)461 qedf_dbg_offload_stats_open(struct inode *inode, struct file *file)
462 {
463 struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
464 struct qedf_ctx *qedf = container_of(qedf_dbg,
465 struct qedf_ctx, dbg_ctx);
466
467 return single_open(file, qedf_offload_stats_show, qedf);
468 }
469
470 const struct file_operations qedf_dbg_fops[] = {
471 qedf_dbg_fileops(qedf, fp_int),
472 qedf_dbg_fileops_seq(qedf, io_trace),
473 qedf_dbg_fileops(qedf, debug),
474 qedf_dbg_fileops(qedf, stop_io_on_error),
475 qedf_dbg_fileops_seq(qedf, driver_stats),
476 qedf_dbg_fileops(qedf, clear_stats),
477 qedf_dbg_fileops_seq(qedf, offload_stats),
478 /* This must be last */
479 { },
480 };
481
482 #else /* CONFIG_DEBUG_FS */
483 void qedf_dbg_host_init(struct qedf_dbg_ctx *);
484 void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
485 void qedf_dbg_init(char *);
486 void qedf_dbg_exit(void);
487 #endif /* CONFIG_DEBUG_FS */
488