// 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 <linux/vmalloc.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
*/
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
*/
void
qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf_dbg)
{
QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
"entry\n" );
/* remove debugfs entries of this PF */
debugfs_remove_recursive(qedf_dbg->bdf_dentry);
qedf_dbg->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)
{
ssize_t ret;
size_t cnt = 0;
char *cbuf;
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" );
cbuf = vmalloc(QEDF_DEBUGFS_LOG_LEN);
if (!cbuf)
return 0;
cnt += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt, "\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 += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt,
"#%d: %lu\n" , id, fp->completions);
}
ret = simple_read_from_buffer(buffer, count, ppos, cbuf, cnt);
vfree(cbuf);
return ret;
}
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;
char cbuf[32];
struct qedf_dbg_ctx *qedf_dbg =
(struct qedf_dbg_ctx *)filp->private_data;
QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "debug mask=0x%x\n" , qedf_debug);
cnt = scnprintf(cbuf, sizeof (cbuf), "debug mask = 0x%x\n" , qedf_debug);
return simple_read_from_buffer(buffer, count, ppos, cbuf, 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_dbg =
(struct qedf_dbg_ctx *)filp->private_data;
if (!count || *ppos)
return 0;
kern_buf = memdup_user_nul(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_dbg, 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;
char cbuf[7];
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 = scnprintf(cbuf, sizeof (cbuf), "%s\n" ,
qedf->stop_io_on_error ? "true" : "false" );
return simple_read_from_buffer(buffer, count, ppos, cbuf, 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 */
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