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Release 4.11 drivers/scsi/qedf/qedf_debugfs.c

/*
 *  QLogic FCoE Offload Driver
 *  Copyright (c) 2016 QLogic Corporation
 *
 *  This software is available under the terms of the GNU General Public License
 *  (GPL) Version 2, available from the file COPYING in the main directory of
 *  this source tree.
 */
#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, struct qedf_debugfs_ops *dops, struct file_operations *fops) { char host_dirname[32]; struct dentry *file_dentry = NULL; 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); if (!qedf->bdf_dentry) return; /* create debugfs files */ while (dops) { if (!(dops->name)) break; file_dentry = debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf, fops); if (!file_dentry) { QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Debugfs entry %s creation failed\n", dops->name); debugfs_remove_recursive(qedf->bdf_dentry); return; } dops++; fops++; } }

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/** * 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; }

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/** * 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); if (!qedf_dbg_root) QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Init of debugfs " "failed\n"); }

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/** * 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; }

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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; }

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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; }

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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; }

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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; }

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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; }

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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; }

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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; }

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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); }

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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, "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, "single SGEs: %d\n", qedf->single_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, "%06x: free_sqes: %d, num_active_ios: %d\n", rdata->ids.port_id, atomic_read(&fcport->free_sqes), atomic_read(&fcport->num_active_ios)); } rcu_read_unlock(); return 0; }

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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); }

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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; }

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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->single_sge_ios = 0; qedf->fast_sge_ios = 0; return count; }

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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; }

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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); }

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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 */ { NULL, NULL }, }; #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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