xref: /openbmc/linux/drivers/scsi/qedf/qedf_debugfs.c (revision 563e6092)
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 #include <linux/vmalloc.h>
12 
13 #include "qedf.h"
14 #include "qedf_dbg.h"
15 
16 static struct dentry *qedf_dbg_root;
17 
18 /*
19  * qedf_dbg_host_init - setup the debugfs file for the pf
20  */
21 void
qedf_dbg_host_init(struct qedf_dbg_ctx * qedf,const struct qedf_debugfs_ops * dops,const struct file_operations * fops)22 qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
23 		    const struct qedf_debugfs_ops *dops,
24 		    const struct file_operations *fops)
25 {
26 	char host_dirname[32];
27 
28 	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n");
29 	/* create pf dir */
30 	sprintf(host_dirname, "host%u", qedf->host_no);
31 	qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root);
32 
33 	/* create debugfs files */
34 	while (dops) {
35 		if (!(dops->name))
36 			break;
37 
38 		debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf,
39 				    fops);
40 		dops++;
41 		fops++;
42 	}
43 }
44 
45 /*
46  * qedf_dbg_host_exit - clear out the pf's debugfs entries
47  */
48 void
qedf_dbg_host_exit(struct qedf_dbg_ctx * qedf_dbg)49 qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf_dbg)
50 {
51 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
52 		   "entry\n");
53 	/* remove debugfs  entries of this PF */
54 	debugfs_remove_recursive(qedf_dbg->bdf_dentry);
55 	qedf_dbg->bdf_dentry = NULL;
56 }
57 
58 /*
59  * qedf_dbg_init - start up debugfs for the driver
60  */
61 void
qedf_dbg_init(char * drv_name)62 qedf_dbg_init(char *drv_name)
63 {
64 	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");
65 
66 	/* create qed dir in root of debugfs. NULL means debugfs root */
67 	qedf_dbg_root = debugfs_create_dir(drv_name, NULL);
68 }
69 
70 /*
71  * qedf_dbg_exit - clean out the driver's debugfs entries
72  */
73 void
qedf_dbg_exit(void)74 qedf_dbg_exit(void)
75 {
76 	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "
77 		   "entry\n");
78 
79 	/* remove qed dir in root of debugfs */
80 	debugfs_remove_recursive(qedf_dbg_root);
81 	qedf_dbg_root = NULL;
82 }
83 
84 const struct qedf_debugfs_ops qedf_debugfs_ops[] = {
85 	{ "fp_int", NULL },
86 	{ "io_trace", NULL },
87 	{ "debug", NULL },
88 	{ "stop_io_on_error", NULL},
89 	{ "driver_stats", NULL},
90 	{ "clear_stats", NULL},
91 	{ "offload_stats", NULL},
92 	/* This must be last */
93 	{ NULL, NULL }
94 };
95 
96 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);
97 
98 static ssize_t
qedf_dbg_fp_int_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)99 qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,
100 			 loff_t *ppos)
101 {
102 	ssize_t ret;
103 	size_t cnt = 0;
104 	char *cbuf;
105 	int id;
106 	struct qedf_fastpath *fp = NULL;
107 	struct qedf_dbg_ctx *qedf_dbg =
108 				(struct qedf_dbg_ctx *)filp->private_data;
109 	struct qedf_ctx *qedf = container_of(qedf_dbg,
110 	    struct qedf_ctx, dbg_ctx);
111 
112 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
113 
114 	cbuf = vmalloc(QEDF_DEBUGFS_LOG_LEN);
115 	if (!cbuf)
116 		return 0;
117 
118 	cnt += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt, "\nFastpath I/O completions\n\n");
119 
120 	for (id = 0; id < qedf->num_queues; id++) {
121 		fp = &(qedf->fp_array[id]);
122 		if (fp->sb_id == QEDF_SB_ID_NULL)
123 			continue;
124 		cnt += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt,
125 				 "#%d: %lu\n", id, fp->completions);
126 	}
127 
128 	ret = simple_read_from_buffer(buffer, count, ppos, cbuf, cnt);
129 
130 	vfree(cbuf);
131 
132 	return ret;
133 }
134 
135 static ssize_t
qedf_dbg_fp_int_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)136 qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer,
137 			  size_t count, loff_t *ppos)
138 {
139 	if (!count || *ppos)
140 		return 0;
141 
142 	return count;
143 }
144 
145 static ssize_t
qedf_dbg_debug_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)146 qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count,
147 			loff_t *ppos)
148 {
149 	int cnt;
150 	char cbuf[32];
151 	struct qedf_dbg_ctx *qedf_dbg =
152 				(struct qedf_dbg_ctx *)filp->private_data;
153 
154 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "debug mask=0x%x\n", qedf_debug);
155 	cnt = scnprintf(cbuf, sizeof(cbuf), "debug mask = 0x%x\n", qedf_debug);
156 
157 	return simple_read_from_buffer(buffer, count, ppos, cbuf, cnt);
158 }
159 
160 static ssize_t
qedf_dbg_debug_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)161 qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,
162 			 size_t count, loff_t *ppos)
163 {
164 	uint32_t val;
165 	void *kern_buf;
166 	int rval;
167 	struct qedf_dbg_ctx *qedf_dbg =
168 	    (struct qedf_dbg_ctx *)filp->private_data;
169 
170 	if (!count || *ppos)
171 		return 0;
172 
173 	kern_buf = memdup_user_nul(buffer, count);
174 	if (IS_ERR(kern_buf))
175 		return PTR_ERR(kern_buf);
176 
177 	rval = kstrtouint(kern_buf, 10, &val);
178 	kfree(kern_buf);
179 	if (rval)
180 		return rval;
181 
182 	if (val == 1)
183 		qedf_debug = QEDF_DEFAULT_LOG_MASK;
184 	else
185 		qedf_debug = val;
186 
187 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);
188 	return count;
189 }
190 
191 static ssize_t
qedf_dbg_stop_io_on_error_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)192 qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer,
193 				   size_t count, loff_t *ppos)
194 {
195 	int cnt;
196 	char cbuf[7];
197 	struct qedf_dbg_ctx *qedf_dbg =
198 				(struct qedf_dbg_ctx *)filp->private_data;
199 	struct qedf_ctx *qedf = container_of(qedf_dbg,
200 	    struct qedf_ctx, dbg_ctx);
201 
202 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
203 	cnt = scnprintf(cbuf, sizeof(cbuf), "%s\n",
204 	    qedf->stop_io_on_error ? "true" : "false");
205 
206 	return simple_read_from_buffer(buffer, count, ppos, cbuf, cnt);
207 }
208 
209 static ssize_t
qedf_dbg_stop_io_on_error_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)210 qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,
211 				    const char __user *buffer, size_t count,
212 				    loff_t *ppos)
213 {
214 	void *kern_buf;
215 	struct qedf_dbg_ctx *qedf_dbg =
216 				(struct qedf_dbg_ctx *)filp->private_data;
217 	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
218 	    dbg_ctx);
219 
220 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
221 
222 	if (!count || *ppos)
223 		return 0;
224 
225 	kern_buf = memdup_user(buffer, 6);
226 	if (IS_ERR(kern_buf))
227 		return PTR_ERR(kern_buf);
228 
229 	if (strncmp(kern_buf, "false", 5) == 0)
230 		qedf->stop_io_on_error = false;
231 	else if (strncmp(kern_buf, "true", 4) == 0)
232 		qedf->stop_io_on_error = true;
233 	else if (strncmp(kern_buf, "now", 3) == 0)
234 		/* Trigger from user to stop all I/O on this host */
235 		set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
236 
237 	kfree(kern_buf);
238 	return count;
239 }
240 
241 static int
qedf_io_trace_show(struct seq_file * s,void * unused)242 qedf_io_trace_show(struct seq_file *s, void *unused)
243 {
244 	int i, idx = 0;
245 	struct qedf_ctx *qedf = s->private;
246 	struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;
247 	struct qedf_io_log *io_log;
248 	unsigned long flags;
249 
250 	if (!qedf_io_tracing) {
251 		seq_puts(s, "I/O tracing not enabled.\n");
252 		goto out;
253 	}
254 
255 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
256 
257 	spin_lock_irqsave(&qedf->io_trace_lock, flags);
258 	idx = qedf->io_trace_idx;
259 	for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {
260 		io_log = &qedf->io_trace_buf[idx];
261 		seq_printf(s, "%d:", io_log->direction);
262 		seq_printf(s, "0x%x:", io_log->task_id);
263 		seq_printf(s, "0x%06x:", io_log->port_id);
264 		seq_printf(s, "%d:", io_log->lun);
265 		seq_printf(s, "0x%02x:", io_log->op);
266 		seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
267 		    io_log->lba[1], io_log->lba[2], io_log->lba[3]);
268 		seq_printf(s, "%d:", io_log->bufflen);
269 		seq_printf(s, "%d:", io_log->sg_count);
270 		seq_printf(s, "0x%08x:", io_log->result);
271 		seq_printf(s, "%lu:", io_log->jiffies);
272 		seq_printf(s, "%d:", io_log->refcount);
273 		seq_printf(s, "%d:", io_log->req_cpu);
274 		seq_printf(s, "%d:", io_log->int_cpu);
275 		seq_printf(s, "%d:", io_log->rsp_cpu);
276 		seq_printf(s, "%d\n", io_log->sge_type);
277 
278 		idx++;
279 		if (idx == QEDF_IO_TRACE_SIZE)
280 			idx = 0;
281 	}
282 	spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
283 
284 out:
285 	return 0;
286 }
287 
288 static int
qedf_dbg_io_trace_open(struct inode * inode,struct file * file)289 qedf_dbg_io_trace_open(struct inode *inode, struct file *file)
290 {
291 	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
292 	struct qedf_ctx *qedf = container_of(qedf_dbg,
293 	    struct qedf_ctx, dbg_ctx);
294 
295 	return single_open(file, qedf_io_trace_show, qedf);
296 }
297 
298 /* Based on fip_state enum from libfcoe.h */
299 static char *fip_state_names[] = {
300 	"FIP_ST_DISABLED",
301 	"FIP_ST_LINK_WAIT",
302 	"FIP_ST_AUTO",
303 	"FIP_ST_NON_FIP",
304 	"FIP_ST_ENABLED",
305 	"FIP_ST_VNMP_START",
306 	"FIP_ST_VNMP_PROBE1",
307 	"FIP_ST_VNMP_PROBE2",
308 	"FIP_ST_VNMP_CLAIM",
309 	"FIP_ST_VNMP_UP",
310 };
311 
312 /* Based on fc_rport_state enum from libfc.h */
313 static char *fc_rport_state_names[] = {
314 	"RPORT_ST_INIT",
315 	"RPORT_ST_FLOGI",
316 	"RPORT_ST_PLOGI_WAIT",
317 	"RPORT_ST_PLOGI",
318 	"RPORT_ST_PRLI",
319 	"RPORT_ST_RTV",
320 	"RPORT_ST_READY",
321 	"RPORT_ST_ADISC",
322 	"RPORT_ST_DELETE",
323 };
324 
325 static int
qedf_driver_stats_show(struct seq_file * s,void * unused)326 qedf_driver_stats_show(struct seq_file *s, void *unused)
327 {
328 	struct qedf_ctx *qedf = s->private;
329 	struct qedf_rport *fcport;
330 	struct fc_rport_priv *rdata;
331 
332 	seq_printf(s, "Host WWNN/WWPN: %016llx/%016llx\n",
333 		   qedf->wwnn, qedf->wwpn);
334 	seq_printf(s, "Host NPortID: %06x\n", qedf->lport->port_id);
335 	seq_printf(s, "Link State: %s\n", atomic_read(&qedf->link_state) ?
336 	    "Up" : "Down");
337 	seq_printf(s, "Logical Link State: %s\n", qedf->lport->link_up ?
338 	    "Up" : "Down");
339 	seq_printf(s, "FIP state: %s\n", fip_state_names[qedf->ctlr.state]);
340 	seq_printf(s, "FIP VLAN ID: %d\n", qedf->vlan_id & 0xfff);
341 	seq_printf(s, "FIP 802.1Q Priority: %d\n", qedf->prio);
342 	if (qedf->ctlr.sel_fcf) {
343 		seq_printf(s, "FCF WWPN: %016llx\n",
344 			   qedf->ctlr.sel_fcf->switch_name);
345 		seq_printf(s, "FCF MAC: %pM\n", qedf->ctlr.sel_fcf->fcf_mac);
346 	} else {
347 		seq_puts(s, "FCF not selected\n");
348 	}
349 
350 	seq_puts(s, "\nSGE stats:\n\n");
351 	seq_printf(s, "cmg_mgr free io_reqs: %d\n",
352 	    atomic_read(&qedf->cmd_mgr->free_list_cnt));
353 	seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);
354 	seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);
355 
356 	seq_puts(s, "Offloaded ports:\n\n");
357 
358 	rcu_read_lock();
359 	list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
360 		rdata = fcport->rdata;
361 		if (rdata == NULL)
362 			continue;
363 		seq_printf(s, "%016llx/%016llx/%06x: state=%s, free_sqes=%d, num_active_ios=%d\n",
364 			   rdata->rport->node_name, rdata->rport->port_name,
365 			   rdata->ids.port_id,
366 			   fc_rport_state_names[rdata->rp_state],
367 			   atomic_read(&fcport->free_sqes),
368 			   atomic_read(&fcport->num_active_ios));
369 	}
370 	rcu_read_unlock();
371 
372 	return 0;
373 }
374 
375 static int
qedf_dbg_driver_stats_open(struct inode * inode,struct file * file)376 qedf_dbg_driver_stats_open(struct inode *inode, struct file *file)
377 {
378 	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
379 	struct qedf_ctx *qedf = container_of(qedf_dbg,
380 	    struct qedf_ctx, dbg_ctx);
381 
382 	return single_open(file, qedf_driver_stats_show, qedf);
383 }
384 
385 static ssize_t
qedf_dbg_clear_stats_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)386 qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer,
387 				   size_t count, loff_t *ppos)
388 {
389 	int cnt = 0;
390 
391 	/* Essentially a read stub */
392 	cnt = min_t(int, count, cnt - *ppos);
393 	*ppos += cnt;
394 	return cnt;
395 }
396 
397 static ssize_t
qedf_dbg_clear_stats_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)398 qedf_dbg_clear_stats_cmd_write(struct file *filp,
399 				    const char __user *buffer, size_t count,
400 				    loff_t *ppos)
401 {
402 	struct qedf_dbg_ctx *qedf_dbg =
403 				(struct qedf_dbg_ctx *)filp->private_data;
404 	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
405 	    dbg_ctx);
406 
407 	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");
408 
409 	if (!count || *ppos)
410 		return 0;
411 
412 	/* Clear stat counters exposed by 'stats' node */
413 	qedf->slow_sge_ios = 0;
414 	qedf->fast_sge_ios = 0;
415 
416 	return count;
417 }
418 
419 static int
qedf_offload_stats_show(struct seq_file * s,void * unused)420 qedf_offload_stats_show(struct seq_file *s, void *unused)
421 {
422 	struct qedf_ctx *qedf = s->private;
423 	struct qed_fcoe_stats *fw_fcoe_stats;
424 
425 	fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
426 	if (!fw_fcoe_stats) {
427 		QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
428 		    "fw_fcoe_stats.\n");
429 		goto out;
430 	}
431 
432 	/* Query firmware for offload stats */
433 	qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
434 
435 	seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"
436 	    "fcoe_rx_data_pkt_cnt=%llu\n"
437 	    "fcoe_rx_xfer_pkt_cnt=%llu\n"
438 	    "fcoe_rx_other_pkt_cnt=%llu\n"
439 	    "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"
440 	    "fcoe_silent_drop_pkt_crc_error_cnt=%u\n"
441 	    "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"
442 	    "fcoe_silent_drop_total_pkt_cnt=%u\n"
443 	    "fcoe_silent_drop_pkt_rq_full_cnt=%u\n"
444 	    "fcoe_tx_byte_cnt=%llu\n"
445 	    "fcoe_tx_data_pkt_cnt=%llu\n"
446 	    "fcoe_tx_xfer_pkt_cnt=%llu\n"
447 	    "fcoe_tx_other_pkt_cnt=%llu\n",
448 	    fw_fcoe_stats->fcoe_rx_byte_cnt,
449 	    fw_fcoe_stats->fcoe_rx_data_pkt_cnt,
450 	    fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,
451 	    fw_fcoe_stats->fcoe_rx_other_pkt_cnt,
452 	    fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,
453 	    fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,
454 	    fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,
455 	    fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,
456 	    fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,
457 	    fw_fcoe_stats->fcoe_tx_byte_cnt,
458 	    fw_fcoe_stats->fcoe_tx_data_pkt_cnt,
459 	    fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,
460 	    fw_fcoe_stats->fcoe_tx_other_pkt_cnt);
461 
462 	kfree(fw_fcoe_stats);
463 out:
464 	return 0;
465 }
466 
467 static int
qedf_dbg_offload_stats_open(struct inode * inode,struct file * file)468 qedf_dbg_offload_stats_open(struct inode *inode, struct file *file)
469 {
470 	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
471 	struct qedf_ctx *qedf = container_of(qedf_dbg,
472 	    struct qedf_ctx, dbg_ctx);
473 
474 	return single_open(file, qedf_offload_stats_show, qedf);
475 }
476 
477 const struct file_operations qedf_dbg_fops[] = {
478 	qedf_dbg_fileops(qedf, fp_int),
479 	qedf_dbg_fileops_seq(qedf, io_trace),
480 	qedf_dbg_fileops(qedf, debug),
481 	qedf_dbg_fileops(qedf, stop_io_on_error),
482 	qedf_dbg_fileops_seq(qedf, driver_stats),
483 	qedf_dbg_fileops(qedf, clear_stats),
484 	qedf_dbg_fileops_seq(qedf, offload_stats),
485 	/* This must be last */
486 	{ },
487 };
488 
489 #else /* CONFIG_DEBUG_FS */
490 void qedf_dbg_host_init(struct qedf_dbg_ctx *);
491 void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
492 void qedf_dbg_init(char *);
493 void qedf_dbg_exit(void);
494 #endif /* CONFIG_DEBUG_FS */
495