[linux-2.6-block.git] / drivers / scsi / qedf / qedf_debugfs.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  QLogic FCoE Offload Driver
 *  Copyright (c) 2016-2018 QLogic Corporation
 */
#ifdef CONFIG_DEBUG_FS

#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <linux/module.h>

#include "qedf.h"
#include "qedf_dbg.h"

static struct dentry *qedf_dbg_root;

/**
 * qedf_dbg_host_init - setup the debugfs file for the pf
 * @pf: the pf that is starting up
 **/
void
qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
		    const struct qedf_debugfs_ops *dops,
		    const struct file_operations *fops)
{
	char host_dirname[32];

	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n");
	/* create pf dir */
	sprintf(host_dirname, "host%u", qedf->host_no);
	qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root);

	/* create debugfs files */
	while (dops) {
		if (!(dops->name))
			break;

		debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf,
				    fops);
		dops++;
		fops++;
	}
}

/**
 * qedf_dbg_host_exit - clear out the pf's debugfs entries
 * @pf: the pf that is stopping
 **/
void
qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf)
{
	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
		   "entry\n");
	/* remove debugfs  entries of this PF */
	debugfs_remove_recursive(qedf->bdf_dentry);
	qedf->bdf_dentry = NULL;
}

/**
 * qedf_dbg_init - start up debugfs for the driver
 **/
void
qedf_dbg_init(char *drv_name)
{
	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");

	/* create qed dir in root of debugfs. NULL means debugfs root */
	qedf_dbg_root = debugfs_create_dir(drv_name, NULL);
}

/**
 * qedf_dbg_exit - clean out the driver's debugfs entries
 **/
void
qedf_dbg_exit(void)
{
	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "
		   "entry\n");

	/* remove qed dir in root of debugfs */
	debugfs_remove_recursive(qedf_dbg_root);
	qedf_dbg_root = NULL;
}

const struct qedf_debugfs_ops qedf_debugfs_ops[] = {
	{ "fp_int", NULL },
	{ "io_trace", NULL },
	{ "debug", NULL },
	{ "stop_io_on_error", NULL},
	{ "driver_stats", NULL},
	{ "clear_stats", NULL},
	{ "offload_stats", NULL},
	/* This must be last */
	{ NULL, NULL }
};

DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);

static ssize_t
qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,
			 loff_t *ppos)
{
	size_t cnt = 0;
	int id;
	struct qedf_fastpath *fp = NULL;
	struct qedf_dbg_ctx *qedf_dbg =
				(struct qedf_dbg_ctx *)filp->private_data;
	struct qedf_ctx *qedf = container_of(qedf_dbg,
	    struct qedf_ctx, dbg_ctx);

	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");

	cnt = sprintf(buffer, "\nFastpath I/O completions\n\n");

	for (id = 0; id < qedf->num_queues; id++) {
		fp = &(qedf->fp_array[id]);
		if (fp->sb_id == QEDF_SB_ID_NULL)
			continue;
		cnt += sprintf((buffer + cnt), "#%d: %lu\n", id,
			       fp->completions);
	}

	cnt = min_t(int, count, cnt - *ppos);
	*ppos += cnt;
	return cnt;
}

static ssize_t
qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer,
			  size_t count, loff_t *ppos)
{
	if (!count || *ppos)
		return 0;

	return count;
}

static ssize_t
qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count,
			loff_t *ppos)
{
	int cnt;
	struct qedf_dbg_ctx *qedf =
				(struct qedf_dbg_ctx *)filp->private_data;

	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n");
	cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug);

	cnt = min_t(int, count, cnt - *ppos);
	*ppos += cnt;
	return cnt;
}

static ssize_t
qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,
			 size_t count, loff_t *ppos)
{
	uint32_t val;
	void *kern_buf;
	int rval;
	struct qedf_dbg_ctx *qedf =
	    (struct qedf_dbg_ctx *)filp->private_data;

	if (!count || *ppos)
		return 0;

	kern_buf = memdup_user(buffer, count);
	if (IS_ERR(kern_buf))
		return PTR_ERR(kern_buf);

	rval = kstrtouint(kern_buf, 10, &val);
	kfree(kern_buf);
	if (rval)
		return rval;

	if (val == 1)
		qedf_debug = QEDF_DEFAULT_LOG_MASK;
	else
		qedf_debug = val;

	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);
	return count;
}

static ssize_t
qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer,
				   size_t count, loff_t *ppos)
{
	int cnt;
	struct qedf_dbg_ctx *qedf_dbg =
				(struct qedf_dbg_ctx *)filp->private_data;
	struct qedf_ctx *qedf = container_of(qedf_dbg,
	    struct qedf_ctx, dbg_ctx);

	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
	cnt = sprintf(buffer, "%s\n",
	    qedf->stop_io_on_error ? "true" : "false");

	cnt = min_t(int, count, cnt - *ppos);
	*ppos += cnt;
	return cnt;
}

static ssize_t
qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,
				    const char __user *buffer, size_t count,
				    loff_t *ppos)
{
	void *kern_buf;
	struct qedf_dbg_ctx *qedf_dbg =
				(struct qedf_dbg_ctx *)filp->private_data;
	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
	    dbg_ctx);

	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");

	if (!count || *ppos)
		return 0;

	kern_buf = memdup_user(buffer, 6);
	if (IS_ERR(kern_buf))
		return PTR_ERR(kern_buf);

	if (strncmp(kern_buf, "false", 5) == 0)
		qedf->stop_io_on_error = false;
	else if (strncmp(kern_buf, "true", 4) == 0)
		qedf->stop_io_on_error = true;
	else if (strncmp(kern_buf, "now", 3) == 0)
		/* Trigger from user to stop all I/O on this host */
		set_bit(QEDF_DBG_STOP_IO, &qedf->flags);

	kfree(kern_buf);
	return count;
}

static int
qedf_io_trace_show(struct seq_file *s, void *unused)
{
	int i, idx = 0;
	struct qedf_ctx *qedf = s->private;
	struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;
	struct qedf_io_log *io_log;
	unsigned long flags;

	if (!qedf_io_tracing) {
		seq_puts(s, "I/O tracing not enabled.\n");
		goto out;
	}

	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");

	spin_lock_irqsave(&qedf->io_trace_lock, flags);
	idx = qedf->io_trace_idx;
	for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {
		io_log = &qedf->io_trace_buf[idx];
		seq_printf(s, "%d:", io_log->direction);
		seq_printf(s, "0x%x:", io_log->task_id);
		seq_printf(s, "0x%06x:", io_log->port_id);
		seq_printf(s, "%d:", io_log->lun);
		seq_printf(s, "0x%02x:", io_log->op);
		seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
		    io_log->lba[1], io_log->lba[2], io_log->lba[3]);
		seq_printf(s, "%d:", io_log->bufflen);
		seq_printf(s, "%d:", io_log->sg_count);
		seq_printf(s, "0x%08x:", io_log->result);
		seq_printf(s, "%lu:", io_log->jiffies);
		seq_printf(s, "%d:", io_log->refcount);
		seq_printf(s, "%d:", io_log->req_cpu);
		seq_printf(s, "%d:", io_log->int_cpu);
		seq_printf(s, "%d:", io_log->rsp_cpu);
		seq_printf(s, "%d\n", io_log->sge_type);

		idx++;
		if (idx == QEDF_IO_TRACE_SIZE)
			idx = 0;
	}
	spin_unlock_irqrestore(&qedf->io_trace_lock, flags);

out:
	return 0;
}

static int
qedf_dbg_io_trace_open(struct inode *inode, struct file *file)
{
	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
	struct qedf_ctx *qedf = container_of(qedf_dbg,
	    struct qedf_ctx, dbg_ctx);

	return single_open(file, qedf_io_trace_show, qedf);
}

/* Based on fip_state enum from libfcoe.h */
static char *fip_state_names[] = {
	"FIP_ST_DISABLED",
	"FIP_ST_LINK_WAIT",
	"FIP_ST_AUTO",
	"FIP_ST_NON_FIP",
	"FIP_ST_ENABLED",
	"FIP_ST_VNMP_START",
	"FIP_ST_VNMP_PROBE1",
	"FIP_ST_VNMP_PROBE2",
	"FIP_ST_VNMP_CLAIM",
	"FIP_ST_VNMP_UP",
};

/* Based on fc_rport_state enum from libfc.h */
static char *fc_rport_state_names[] = {
	"RPORT_ST_INIT",
	"RPORT_ST_FLOGI",
	"RPORT_ST_PLOGI_WAIT",
	"RPORT_ST_PLOGI",
	"RPORT_ST_PRLI",
	"RPORT_ST_RTV",
	"RPORT_ST_READY",
	"RPORT_ST_ADISC",
	"RPORT_ST_DELETE",
};

static int
qedf_driver_stats_show(struct seq_file *s, void *unused)
{
	struct qedf_ctx *qedf = s->private;
	struct qedf_rport *fcport;
	struct fc_rport_priv *rdata;

	seq_printf(s, "Host WWNN/WWPN: %016llx/%016llx\n",
		   qedf->wwnn, qedf->wwpn);
	seq_printf(s, "Host NPortID: %06x\n", qedf->lport->port_id);
	seq_printf(s, "Link State: %s\n", atomic_read(&qedf->link_state) ?
	    "Up" : "Down");
	seq_printf(s, "Logical Link State: %s\n", qedf->lport->link_up ?
	    "Up" : "Down");
	seq_printf(s, "FIP state: %s\n", fip_state_names[qedf->ctlr.state]);
	seq_printf(s, "FIP VLAN ID: %d\n", qedf->vlan_id & 0xfff);
	seq_printf(s, "FIP 802.1Q Priority: %d\n", qedf->prio);
	if (qedf->ctlr.sel_fcf) {
		seq_printf(s, "FCF WWPN: %016llx\n",
			   qedf->ctlr.sel_fcf->switch_name);
		seq_printf(s, "FCF MAC: %pM\n", qedf->ctlr.sel_fcf->fcf_mac);
	} else {
		seq_puts(s, "FCF not selected\n");
	}

	seq_puts(s, "\nSGE stats:\n\n");
	seq_printf(s, "cmg_mgr free io_reqs: %d\n",
	    atomic_read(&qedf->cmd_mgr->free_list_cnt));
	seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);
	seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);

	seq_puts(s, "Offloaded ports:\n\n");

	rcu_read_lock();
	list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
		rdata = fcport->rdata;
		if (rdata == NULL)
			continue;
		seq_printf(s, "%016llx/%016llx/%06x: state=%s, free_sqes=%d, num_active_ios=%d\n",
			   rdata->rport->node_name, rdata->rport->port_name,
			   rdata->ids.port_id,
			   fc_rport_state_names[rdata->rp_state],
			   atomic_read(&fcport->free_sqes),
			   atomic_read(&fcport->num_active_ios));
	}
	rcu_read_unlock();

	return 0;
}

static int
qedf_dbg_driver_stats_open(struct inode *inode, struct file *file)
{
	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
	struct qedf_ctx *qedf = container_of(qedf_dbg,
	    struct qedf_ctx, dbg_ctx);

	return single_open(file, qedf_driver_stats_show, qedf);
}

static ssize_t
qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer,
				   size_t count, loff_t *ppos)
{
	int cnt = 0;

	/* Essentially a read stub */
	cnt = min_t(int, count, cnt - *ppos);
	*ppos += cnt;
	return cnt;
}

static ssize_t
qedf_dbg_clear_stats_cmd_write(struct file *filp,
				    const char __user *buffer, size_t count,
				    loff_t *ppos)
{
	struct qedf_dbg_ctx *qedf_dbg =
				(struct qedf_dbg_ctx *)filp->private_data;
	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
	    dbg_ctx);

	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");

	if (!count || *ppos)
		return 0;

	/* Clear stat counters exposed by 'stats' node */
	qedf->slow_sge_ios = 0;
	qedf->fast_sge_ios = 0;

	return count;
}

static int
qedf_offload_stats_show(struct seq_file *s, void *unused)
{
	struct qedf_ctx *qedf = s->private;
	struct qed_fcoe_stats *fw_fcoe_stats;

	fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
	if (!fw_fcoe_stats) {
		QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
		    "fw_fcoe_stats.\n");
		goto out;
	}

	/* Query firmware for offload stats */
	qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);

	seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"
	    "fcoe_rx_data_pkt_cnt=%llu\n"
	    "fcoe_rx_xfer_pkt_cnt=%llu\n"
	    "fcoe_rx_other_pkt_cnt=%llu\n"
	    "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"
	    "fcoe_silent_drop_pkt_crc_error_cnt=%u\n"
	    "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"
	    "fcoe_silent_drop_total_pkt_cnt=%u\n"
	    "fcoe_silent_drop_pkt_rq_full_cnt=%u\n"
	    "fcoe_tx_byte_cnt=%llu\n"
	    "fcoe_tx_data_pkt_cnt=%llu\n"
	    "fcoe_tx_xfer_pkt_cnt=%llu\n"
	    "fcoe_tx_other_pkt_cnt=%llu\n",
	    fw_fcoe_stats->fcoe_rx_byte_cnt,
	    fw_fcoe_stats->fcoe_rx_data_pkt_cnt,
	    fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,
	    fw_fcoe_stats->fcoe_rx_other_pkt_cnt,
	    fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,
	    fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,
	    fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,
	    fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,
	    fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,
	    fw_fcoe_stats->fcoe_tx_byte_cnt,
	    fw_fcoe_stats->fcoe_tx_data_pkt_cnt,
	    fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,
	    fw_fcoe_stats->fcoe_tx_other_pkt_cnt);

	kfree(fw_fcoe_stats);
out:
	return 0;
}

static int
qedf_dbg_offload_stats_open(struct inode *inode, struct file *file)
{
	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
	struct qedf_ctx *qedf = container_of(qedf_dbg,
	    struct qedf_ctx, dbg_ctx);

	return single_open(file, qedf_offload_stats_show, qedf);
}

const struct file_operations qedf_dbg_fops[] = {
	qedf_dbg_fileops(qedf, fp_int),
	qedf_dbg_fileops_seq(qedf, io_trace),
	qedf_dbg_fileops(qedf, debug),
	qedf_dbg_fileops(qedf, stop_io_on_error),
	qedf_dbg_fileops_seq(qedf, driver_stats),
	qedf_dbg_fileops(qedf, clear_stats),
	qedf_dbg_fileops_seq(qedf, offload_stats),
	/* This must be last */
	{ },
};

#else /* CONFIG_DEBUG_FS */
void qedf_dbg_host_init(struct qedf_dbg_ctx *);
void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
void qedf_dbg_init(char *);
void qedf_dbg_exit(void);
#endif /* CONFIG_DEBUG_FS */
Commit	Line	Data
3287e96a	1	// SPDX-License-Identifier: GPL-2.0-only
61d8658b DC	2	/*
61d8658b DC	3	* QLogic FCoE Offload Driver
5d1c8b5b	4	* Copyright (c) 2016-2018 QLogic Corporation
61d8658b DC	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	* @pf: the pf that is starting up
	20	**/
	21	void
	22	qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
d9ea463a AB	23	const struct qedf_debugfs_ops *dops,
d9ea463a AB	24	const struct file_operations *fops)
61d8658b DC	25	{
61d8658b DC	26	char host_dirname[32];
61d8658b DC	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);
61d8658b DC	32
	33	/* create debugfs files */
	34	while (dops) {
	35	if (!(dops->name))
	36	break;
	37
26febfb3 GKH	38	debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf,
26febfb3 GKH	39	fops);
61d8658b DC	40	dops++;
	41	fops++;
	42	}
	43	}
	44
	45	/**
	46	* qedf_dbg_host_exit - clear out the pf's debugfs entries
	47	* @pf: the pf that is stopping
	48	**/
	49	void
	50	qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf)
	51	{
	52	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
	53	"entry\n");
	54	/* remove debugfs entries of this PF */
	55	debugfs_remove_recursive(qedf->bdf_dentry);
	56	qedf->bdf_dentry = NULL;
	57	}
	58
	59	/**
	60	* qedf_dbg_init - start up debugfs for the driver
	61	**/
	62	void
	63	qedf_dbg_init(char *drv_name)
	64	{
	65	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");
	66
	67	/* create qed dir in root of debugfs. NULL means debugfs root */
	68	qedf_dbg_root = debugfs_create_dir(drv_name, NULL);
61d8658b DC	69	}
	70
	71	/**
	72	* qedf_dbg_exit - clean out the driver's debugfs entries
	73	**/
	74	void
	75	qedf_dbg_exit(void)
	76	{
	77	QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "
	78	"entry\n");
	79
	80	/* remove qed dir in root of debugfs */
	81	debugfs_remove_recursive(qedf_dbg_root);
	82	qedf_dbg_root = NULL;
	83	}
	84
d9ea463a	85	const struct qedf_debugfs_ops qedf_debugfs_ops[] = {
61d8658b DC	86	{ "fp_int", NULL },
	87	{ "io_trace", NULL },
	88	{ "debug", NULL },
	89	{ "stop_io_on_error", NULL},
	90	{ "driver_stats", NULL},
	91	{ "clear_stats", NULL},
	92	{ "offload_stats", NULL},
	93	/* This must be last */
	94	{ NULL, NULL }
	95	};
	96
	97	DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);
	98
	99	static ssize_t
	100	qedf_dbg_fp_int_cmd_read(struct file filp, char __user buffer, size_t count,
	101	loff_t *ppos)
	102	{
	103	size_t cnt = 0;
	104	int id;
	105	struct qedf_fastpath *fp = NULL;
	106	struct qedf_dbg_ctx *qedf_dbg =
	107	(struct qedf_dbg_ctx *)filp->private_data;
	108	struct qedf_ctx *qedf = container_of(qedf_dbg,
	109	struct qedf_ctx, dbg_ctx);
	110
	111	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
	112
	113	cnt = sprintf(buffer, "\nFastpath I/O completions\n\n");
	114
	115	for (id = 0; id < qedf->num_queues; id++) {
	116	fp = &(qedf->fp_array[id]);
	117	if (fp->sb_id == QEDF_SB_ID_NULL)
	118	continue;
	119	cnt += sprintf((buffer + cnt), "#%d: %lu\n", id,
	120	fp->completions);
	121	}
	122
	123	cnt = min_t(int, count, cnt - *ppos);
	124	*ppos += cnt;
	125	return cnt;
	126	}
	127
	128	static ssize_t
	129	qedf_dbg_fp_int_cmd_write(struct file filp, const char __user buffer,
	130	size_t count, loff_t *ppos)
	131	{
	132	if (!count \|\| *ppos)
	133	return 0;
	134
	135	return count;
	136	}
	137
	138	static ssize_t
	139	qedf_dbg_debug_cmd_read(struct file filp, char __user buffer, size_t count,
	140	loff_t *ppos)
	141	{
	142	int cnt;
	143	struct qedf_dbg_ctx *qedf =
	144	(struct qedf_dbg_ctx *)filp->private_data;
	145
	146	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n");
	147	cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug);
	148
	149	cnt = min_t(int, count, cnt - *ppos);
150	*ppos += cnt;
151	return cnt;
152	}
153
154	static ssize_t
155	qedf_dbg_debug_cmd_write(struct file filp, const char __user buffer,
156	size_t count, loff_t *ppos)
157	{
158	uint32_t val;
159	void *kern_buf;
160	int rval;
161	struct qedf_dbg_ctx *qedf =
162	(struct qedf_dbg_ctx *)filp->private_data;
163
164	if (!count \|\| *ppos)
165	return 0;
166
167	kern_buf = memdup_user(buffer, count);
168	if (IS_ERR(kern_buf))
169	return PTR_ERR(kern_buf);
170
171	rval = kstrtouint(kern_buf, 10, &val);
172	kfree(kern_buf);
173	if (rval)
174	return rval;
175
176	if (val == 1)
177	qedf_debug = QEDF_DEFAULT_LOG_MASK;
178	else
179	qedf_debug = val;
180
181	QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);
182	return count;
183	}
184
185	static ssize_t
186	qedf_dbg_stop_io_on_error_cmd_read(struct file filp, char __user buffer,
187	size_t count, loff_t *ppos)
188	{
189	int cnt;
190	struct qedf_dbg_ctx *qedf_dbg =
191	(struct qedf_dbg_ctx *)filp->private_data;
192	struct qedf_ctx *qedf = container_of(qedf_dbg,
193	struct qedf_ctx, dbg_ctx);
194
195	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
196	cnt = sprintf(buffer, "%s\n",
197	qedf->stop_io_on_error ? "true" : "false");
198
199	cnt = min_t(int, count, cnt - *ppos);
200	*ppos += cnt;
201	return cnt;
202	}
203
204	static ssize_t
205	qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,
206	const char __user *buffer, size_t count,
207	loff_t *ppos)
208	{
209	void *kern_buf;
210	struct qedf_dbg_ctx *qedf_dbg =
211	(struct qedf_dbg_ctx *)filp->private_data;
212	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
213	dbg_ctx);
214
215	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
216
217	if (!count \|\| *ppos)
218	return 0;
219
220	kern_buf = memdup_user(buffer, 6);
221	if (IS_ERR(kern_buf))
222	return PTR_ERR(kern_buf);
223
224	if (strncmp(kern_buf, "false", 5) == 0)
225	qedf->stop_io_on_error = false;
226	else if (strncmp(kern_buf, "true", 4) == 0)
227	qedf->stop_io_on_error = true;
228	else if (strncmp(kern_buf, "now", 3) == 0)
229	/* Trigger from user to stop all I/O on this host */
230	set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
231
232	kfree(kern_buf);
233	return count;
234	}
235
236	static int
237	qedf_io_trace_show(struct seq_file s, void unused)
238	{
239	int i, idx = 0;
240	struct qedf_ctx *qedf = s->private;
241	struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;
242	struct qedf_io_log *io_log;
243	unsigned long flags;
244
245	if (!qedf_io_tracing) {
246	seq_puts(s, "I/O tracing not enabled.\n");
247	goto out;
248	}
249
250	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
251
252	spin_lock_irqsave(&qedf->io_trace_lock, flags);
253	idx = qedf->io_trace_idx;
254	for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {
255	io_log = &qedf->io_trace_buf[idx];
256	seq_printf(s, "%d:", io_log->direction);
257	seq_printf(s, "0x%x:", io_log->task_id);
258	seq_printf(s, "0x%06x:", io_log->port_id);
259	seq_printf(s, "%d:", io_log->lun);
260	seq_printf(s, "0x%02x:", io_log->op);
261	seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
262	io_log->lba[1], io_log->lba[2], io_log->lba[3]);
263	seq_printf(s, "%d:", io_log->bufflen);
264	seq_printf(s, "%d:", io_log->sg_count);
265	seq_printf(s, "0x%08x:", io_log->result);
266	seq_printf(s, "%lu:", io_log->jiffies);
267	seq_printf(s, "%d:", io_log->refcount);
268	seq_printf(s, "%d:", io_log->req_cpu);
269	seq_printf(s, "%d:", io_log->int_cpu);
270	seq_printf(s, "%d:", io_log->rsp_cpu);
271	seq_printf(s, "%d\n", io_log->sge_type);
272
273	idx++;
274	if (idx == QEDF_IO_TRACE_SIZE)
275	idx = 0;
276	}
277	spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
278
279	out:
280	return 0;
281	}
282
283	static int
284	qedf_dbg_io_trace_open(struct inode inode, struct file file)
285	{
286	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
287	struct qedf_ctx *qedf = container_of(qedf_dbg,
288	struct qedf_ctx, dbg_ctx);
289
290	return single_open(file, qedf_io_trace_show, qedf);
291	}
292
892f63d4 CD	293	/* Based on fip_state enum from libfcoe.h */
	294	static char *fip_state_names[] = {
	295	"FIP_ST_DISABLED",
	296	"FIP_ST_LINK_WAIT",
	297	"FIP_ST_AUTO",
	298	"FIP_ST_NON_FIP",
	299	"FIP_ST_ENABLED",
	300	"FIP_ST_VNMP_START",
	301	"FIP_ST_VNMP_PROBE1",
	302	"FIP_ST_VNMP_PROBE2",
	303	"FIP_ST_VNMP_CLAIM",
	304	"FIP_ST_VNMP_UP",
	305	};
	306
	307	/* Based on fc_rport_state enum from libfc.h */
	308	static char *fc_rport_state_names[] = {
	309	"RPORT_ST_INIT",
	310	"RPORT_ST_FLOGI",
	311	"RPORT_ST_PLOGI_WAIT",
	312	"RPORT_ST_PLOGI",
	313	"RPORT_ST_PRLI",
	314	"RPORT_ST_RTV",
	315	"RPORT_ST_READY",
	316	"RPORT_ST_ADISC",
	317	"RPORT_ST_DELETE",
	318	};
	319
61d8658b DC	320	static int
	321	qedf_driver_stats_show(struct seq_file s, void unused)
	322	{
	323	struct qedf_ctx *qedf = s->private;
	324	struct qedf_rport *fcport;
	325	struct fc_rport_priv *rdata;
	326
892f63d4 CD	327	seq_printf(s, "Host WWNN/WWPN: %016llx/%016llx\n",
	328	qedf->wwnn, qedf->wwpn);
	329	seq_printf(s, "Host NPortID: %06x\n", qedf->lport->port_id);
	330	seq_printf(s, "Link State: %s\n", atomic_read(&qedf->link_state) ?
	331	"Up" : "Down");
	332	seq_printf(s, "Logical Link State: %s\n", qedf->lport->link_up ?
	333	"Up" : "Down");
	334	seq_printf(s, "FIP state: %s\n", fip_state_names[qedf->ctlr.state]);
	335	seq_printf(s, "FIP VLAN ID: %d\n", qedf->vlan_id & 0xfff);
	336	seq_printf(s, "FIP 802.1Q Priority: %d\n", qedf->prio);
	337	if (qedf->ctlr.sel_fcf) {
	338	seq_printf(s, "FCF WWPN: %016llx\n",
	339	qedf->ctlr.sel_fcf->switch_name);
	340	seq_printf(s, "FCF MAC: %pM\n", qedf->ctlr.sel_fcf->fcf_mac);
	341	} else {
	342	seq_puts(s, "FCF not selected\n");
	343	}
	344
	345	seq_puts(s, "\nSGE stats:\n\n");
61d8658b DC	346	seq_printf(s, "cmg_mgr free io_reqs: %d\n",
	347	atomic_read(&qedf->cmd_mgr->free_list_cnt));
	348	seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);
61d8658b DC	349	seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);
	350
	351	seq_puts(s, "Offloaded ports:\n\n");
	352
	353	rcu_read_lock();
	354	list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
	355	rdata = fcport->rdata;
	356	if (rdata == NULL)
	357	continue;
892f63d4 CD	358	seq_printf(s, "%016llx/%016llx/%06x: state=%s, free_sqes=%d, num_active_ios=%d\n",
	359	rdata->rport->node_name, rdata->rport->port_name,
	360	rdata->ids.port_id,
	361	fc_rport_state_names[rdata->rp_state],
	362	atomic_read(&fcport->free_sqes),
	363	atomic_read(&fcport->num_active_ios));
61d8658b DC	364	}
	365	rcu_read_unlock();
	366
	367	return 0;
	368	}
	369
	370	static int
	371	qedf_dbg_driver_stats_open(struct inode inode, struct file file)
	372	{
	373	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
	374	struct qedf_ctx *qedf = container_of(qedf_dbg,
	375	struct qedf_ctx, dbg_ctx);
	376
	377	return single_open(file, qedf_driver_stats_show, qedf);
	378	}
	379
	380	static ssize_t
	381	qedf_dbg_clear_stats_cmd_read(struct file filp, char __user buffer,
	382	size_t count, loff_t *ppos)
	383	{
	384	int cnt = 0;
	385
	386	/* Essentially a read stub */
	387	cnt = min_t(int, count, cnt - *ppos);
	388	*ppos += cnt;
	389	return cnt;
	390	}
	391
	392	static ssize_t
	393	qedf_dbg_clear_stats_cmd_write(struct file *filp,
	394	const char __user *buffer, size_t count,
	395	loff_t *ppos)
	396	{
	397	struct qedf_dbg_ctx *qedf_dbg =
	398	(struct qedf_dbg_ctx *)filp->private_data;
	399	struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
	400	dbg_ctx);
	401
	402	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");
	403
	404	if (!count \|\| *ppos)
	405	return 0;
	406
	407	/* Clear stat counters exposed by 'stats' node */
	408	qedf->slow_sge_ios = 0;
61d8658b DC	409	qedf->fast_sge_ios = 0;
	410
	411	return count;
	412	}
	413
	414	static int
	415	qedf_offload_stats_show(struct seq_file s, void unused)
	416	{
	417	struct qedf_ctx *qedf = s->private;
	418	struct qed_fcoe_stats *fw_fcoe_stats;
	419
	420	fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
	421	if (!fw_fcoe_stats) {
	422	QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
	423	"fw_fcoe_stats.\n");
	424	goto out;
	425	}
	426
	427	/* Query firmware for offload stats */
	428	qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
	429
	430	seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"
	431	"fcoe_rx_data_pkt_cnt=%llu\n"
	432	"fcoe_rx_xfer_pkt_cnt=%llu\n"
	433	"fcoe_rx_other_pkt_cnt=%llu\n"
	434	"fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"
	435	"fcoe_silent_drop_pkt_crc_error_cnt=%u\n"
	436	"fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"
	437	"fcoe_silent_drop_total_pkt_cnt=%u\n"
	438	"fcoe_silent_drop_pkt_rq_full_cnt=%u\n"
	439	"fcoe_tx_byte_cnt=%llu\n"
	440	"fcoe_tx_data_pkt_cnt=%llu\n"
	441	"fcoe_tx_xfer_pkt_cnt=%llu\n"
	442	"fcoe_tx_other_pkt_cnt=%llu\n",
	443	fw_fcoe_stats->fcoe_rx_byte_cnt,
	444	fw_fcoe_stats->fcoe_rx_data_pkt_cnt,
	445	fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,
	446	fw_fcoe_stats->fcoe_rx_other_pkt_cnt,
	447	fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,
	448	fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,
	449	fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,
	450	fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,
	451	fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,
	452	fw_fcoe_stats->fcoe_tx_byte_cnt,
	453	fw_fcoe_stats->fcoe_tx_data_pkt_cnt,
	454	fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,
	455	fw_fcoe_stats->fcoe_tx_other_pkt_cnt);
	456
	457	kfree(fw_fcoe_stats);
	458	out:
	459	return 0;
	460	}
	461
	462	static int
	463	qedf_dbg_offload_stats_open(struct inode inode, struct file file)
	464	{
	465	struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
	466	struct qedf_ctx *qedf = container_of(qedf_dbg,
	467	struct qedf_ctx, dbg_ctx);
	468
	469	return single_open(file, qedf_offload_stats_show, qedf);
	470	}
	471
61d8658b DC	472	const struct file_operations qedf_dbg_fops[] = {
	473	qedf_dbg_fileops(qedf, fp_int),
	474	qedf_dbg_fileops_seq(qedf, io_trace),
	475	qedf_dbg_fileops(qedf, debug),
	476	qedf_dbg_fileops(qedf, stop_io_on_error),
	477	qedf_dbg_fileops_seq(qedf, driver_stats),
	478	qedf_dbg_fileops(qedf, clear_stats),
	479	qedf_dbg_fileops_seq(qedf, offload_stats),
	480	/* This must be last */
efacae6d	481	{ },
61d8658b DC	482	};
	483
	484	#else /* CONFIG_DEBUG_FS */
	485	void qedf_dbg_host_init(struct qedf_dbg_ctx *);
	486	void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
	487	void qedf_dbg_init(char *);
	488	void qedf_dbg_exit(void);
	489	#endif /* CONFIG_DEBUG_FS */