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
16static struct dentry *qedf_dbg_root;
17
18/*
19 * qedf_dbg_host_init - setup the debugfs file for the pf
20 */
21void
22qedf_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 */
48void
49qedf_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 */
61void
62qedf_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 */
73void
74qedf_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
84const 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
96DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);
97
98static ssize_t
99qedf_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
135static ssize_t
136qedf_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
145static ssize_t
146qedf_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
160static ssize_t
161qedf_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(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
191static ssize_t
192qedf_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
209static ssize_t
210qedf_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
241static int
242qedf_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
284out:
285	return 0;
286}
287
288static int
289qedf_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 */
299static 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 */
313static 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
325static int
326qedf_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
375static int
376qedf_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
385static ssize_t
386qedf_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
397static ssize_t
398qedf_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
419static int
420qedf_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);
463out:
464	return 0;
465}
466
467static int
468qedf_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
477const 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 */
490void qedf_dbg_host_init(struct qedf_dbg_ctx *);
491void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
492void qedf_dbg_init(char *);
493void qedf_dbg_exit(void);
494#endif /* CONFIG_DEBUG_FS */
495