Orange Pi5 kernel

// 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
 */
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)
{
<------>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_dbg =
<------><------><------><------>(struct qedf_dbg_ctx *)filp->private_data;
 
<------>QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "debug mask=0x%x\n", qedf_debug);
<------>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_dbg =
<------>    (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_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;
<------>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 */