573 lines
15 KiB
C
573 lines
15 KiB
C
/*
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* Copyright 2014 Cisco Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/debugfs.h>
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#include "snic.h"
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/*
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* snic_debugfs_init - Initialize debugfs for snic debug logging
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*
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* Description:
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* When Debugfs is configured this routine sets up fnic debugfs
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* filesystem. If not already created. this routine will crate the
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* fnic directory and statistics directory for trace buffer and
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* stats logging
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*/
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int
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snic_debugfs_init(void)
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{
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int rc = -1;
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struct dentry *de = NULL;
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de = debugfs_create_dir("snic", NULL);
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if (!de) {
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SNIC_DBG("Cannot create debugfs root\n");
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return rc;
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}
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snic_glob->trc_root = de;
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de = debugfs_create_dir("statistics", snic_glob->trc_root);
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if (!de) {
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SNIC_DBG("Cannot create Statistics directory\n");
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return rc;
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}
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snic_glob->stats_root = de;
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rc = 0;
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return rc;
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} /* end of snic_debugfs_init */
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/*
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* snic_debugfs_term - Tear down debugfs intrastructure
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*
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* Description:
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* When Debufs is configured this routine removes debugfs file system
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* elements that are specific to snic
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*/
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void
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snic_debugfs_term(void)
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{
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debugfs_remove(snic_glob->stats_root);
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snic_glob->stats_root = NULL;
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debugfs_remove(snic_glob->trc_root);
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snic_glob->trc_root = NULL;
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}
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/*
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* snic_reset_stats_open - Open the reset_stats file
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*/
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static int
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snic_reset_stats_open(struct inode *inode, struct file *filp)
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{
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SNIC_BUG_ON(!inode->i_private);
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filp->private_data = inode->i_private;
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return 0;
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}
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/*
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* snic_reset_stats_read - Read a reset_stats debugfs file
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* @filp: The file pointer to read from.
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* @ubuf: The buffer tocopy the data to.
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* @cnt: The number of bytes to read.
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* @ppos: The position in the file to start reading frm.
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*
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* Description:
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* This routine reads value of variable reset_stats
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* and stores into local @buf. It will start reading file @ppos and
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* copy up to @cnt of data to @ubuf from @buf.
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*
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* Returns:
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* This function returns the amount of data that was read.
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*/
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static ssize_t
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snic_reset_stats_read(struct file *filp,
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char __user *ubuf,
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size_t cnt,
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loff_t *ppos)
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{
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struct snic *snic = (struct snic *) filp->private_data;
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char buf[64];
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int len;
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len = sprintf(buf, "%u\n", snic->reset_stats);
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return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
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}
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/*
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* snic_reset_stats_write - Write to reset_stats debugfs file
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* @filp: The file pointer to write from
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* @ubuf: The buffer to copy the data from.
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* @cnt: The number of bytes to write.
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* @ppos: The position in the file to start writing to.
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*
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* Description:
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* This routine writes data from user buffer @ubuf to buffer @buf and
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* resets cumulative stats of snic.
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*
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* Returns:
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* This function returns the amount of data that was written.
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*/
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static ssize_t
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snic_reset_stats_write(struct file *filp,
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const char __user *ubuf,
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size_t cnt,
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loff_t *ppos)
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{
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struct snic *snic = (struct snic *) filp->private_data;
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struct snic_stats *stats = &snic->s_stats;
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u64 *io_stats_p = (u64 *) &stats->io;
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u64 *fw_stats_p = (u64 *) &stats->fw;
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char buf[64];
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unsigned long val;
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int ret;
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if (cnt >= sizeof(buf))
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return -EINVAL;
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if (copy_from_user(&buf, ubuf, cnt))
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return -EFAULT;
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buf[cnt] = '\0';
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ret = kstrtoul(buf, 10, &val);
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if (ret < 0)
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return ret;
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snic->reset_stats = val;
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if (snic->reset_stats) {
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/* Skip variable is used to avoid descrepancies to Num IOs
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* and IO Completions stats. Skip incrementing No IO Compls
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* for pending active IOs after reset_stats
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*/
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atomic64_set(&snic->io_cmpl_skip,
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atomic64_read(&stats->io.active));
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memset(&stats->abts, 0, sizeof(struct snic_abort_stats));
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memset(&stats->reset, 0, sizeof(struct snic_reset_stats));
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memset(&stats->misc, 0, sizeof(struct snic_misc_stats));
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memset(io_stats_p+1,
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0,
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sizeof(struct snic_io_stats) - sizeof(u64));
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memset(fw_stats_p+1,
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0,
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sizeof(struct snic_fw_stats) - sizeof(u64));
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}
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(*ppos)++;
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SNIC_HOST_INFO(snic->shost, "Reset Op: Driver statistics.\n");
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return cnt;
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}
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static int
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snic_reset_stats_release(struct inode *inode, struct file *filp)
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{
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filp->private_data = NULL;
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return 0;
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}
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/*
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* snic_stats_show - Formats and prints per host specific driver stats.
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*/
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static int
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snic_stats_show(struct seq_file *sfp, void *data)
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{
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struct snic *snic = (struct snic *) sfp->private;
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struct snic_stats *stats = &snic->s_stats;
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struct timespec last_isr_tms, last_ack_tms;
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u64 maxio_tm;
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int i;
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/* Dump IO Stats */
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seq_printf(sfp,
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"------------------------------------------\n"
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"\t\t IO Statistics\n"
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"------------------------------------------\n");
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maxio_tm = (u64) atomic64_read(&stats->io.max_time);
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seq_printf(sfp,
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"Active IOs : %lld\n"
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"Max Active IOs : %lld\n"
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"Total IOs : %lld\n"
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"IOs Completed : %lld\n"
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"IOs Failed : %lld\n"
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"IOs Not Found : %lld\n"
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"Memory Alloc Failures : %lld\n"
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"REQs Null : %lld\n"
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"SCSI Cmd Pointers Null : %lld\n"
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"Max SGL for any IO : %lld\n"
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"Max IO Size : %lld Sectors\n"
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"Max Queuing Time : %lld\n"
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"Max Completion Time : %lld\n"
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"Max IO Process Time(FW) : %lld (%u msec)\n",
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(u64) atomic64_read(&stats->io.active),
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(u64) atomic64_read(&stats->io.max_active),
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(u64) atomic64_read(&stats->io.num_ios),
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(u64) atomic64_read(&stats->io.compl),
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(u64) atomic64_read(&stats->io.fail),
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(u64) atomic64_read(&stats->io.io_not_found),
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(u64) atomic64_read(&stats->io.alloc_fail),
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(u64) atomic64_read(&stats->io.req_null),
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(u64) atomic64_read(&stats->io.sc_null),
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(u64) atomic64_read(&stats->io.max_sgl),
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(u64) atomic64_read(&stats->io.max_io_sz),
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(u64) atomic64_read(&stats->io.max_qtime),
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(u64) atomic64_read(&stats->io.max_cmpl_time),
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maxio_tm,
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jiffies_to_msecs(maxio_tm));
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seq_puts(sfp, "\nSGL Counters\n");
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for (i = 0; i < SNIC_MAX_SG_DESC_CNT; i++) {
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seq_printf(sfp,
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"%10lld ",
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(u64) atomic64_read(&stats->io.sgl_cnt[i]));
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if ((i + 1) % 8 == 0)
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seq_puts(sfp, "\n");
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}
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/* Dump Abort Stats */
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seq_printf(sfp,
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"\n-------------------------------------------\n"
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"\t\t Abort Statistics\n"
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"---------------------------------------------\n");
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seq_printf(sfp,
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"Aborts : %lld\n"
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"Aborts Fail : %lld\n"
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"Aborts Driver Timeout : %lld\n"
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"Abort FW Timeout : %lld\n"
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"Abort IO NOT Found : %lld\n"
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"Abort Queuing Failed : %lld\n",
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(u64) atomic64_read(&stats->abts.num),
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(u64) atomic64_read(&stats->abts.fail),
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(u64) atomic64_read(&stats->abts.drv_tmo),
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(u64) atomic64_read(&stats->abts.fw_tmo),
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(u64) atomic64_read(&stats->abts.io_not_found),
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(u64) atomic64_read(&stats->abts.q_fail));
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/* Dump Reset Stats */
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seq_printf(sfp,
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"\n-------------------------------------------\n"
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"\t\t Reset Statistics\n"
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"---------------------------------------------\n");
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seq_printf(sfp,
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"HBA Resets : %lld\n"
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"HBA Reset Cmpls : %lld\n"
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"HBA Reset Fail : %lld\n",
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(u64) atomic64_read(&stats->reset.hba_resets),
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(u64) atomic64_read(&stats->reset.hba_reset_cmpl),
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(u64) atomic64_read(&stats->reset.hba_reset_fail));
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/* Dump Firmware Stats */
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seq_printf(sfp,
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"\n-------------------------------------------\n"
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"\t\t Firmware Statistics\n"
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"---------------------------------------------\n");
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seq_printf(sfp,
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"Active FW Requests : %lld\n"
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"Max FW Requests : %lld\n"
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"FW Out Of Resource Errs : %lld\n"
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"FW IO Errors : %lld\n"
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"FW SCSI Errors : %lld\n",
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(u64) atomic64_read(&stats->fw.actv_reqs),
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(u64) atomic64_read(&stats->fw.max_actv_reqs),
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(u64) atomic64_read(&stats->fw.out_of_res),
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(u64) atomic64_read(&stats->fw.io_errs),
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(u64) atomic64_read(&stats->fw.scsi_errs));
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/* Dump Miscellenous Stats */
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seq_printf(sfp,
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"\n---------------------------------------------\n"
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"\t\t Other Statistics\n"
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"\n---------------------------------------------\n");
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jiffies_to_timespec(stats->misc.last_isr_time, &last_isr_tms);
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jiffies_to_timespec(stats->misc.last_ack_time, &last_ack_tms);
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seq_printf(sfp,
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"Last ISR Time : %llu (%8lu.%8lu)\n"
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"Last Ack Time : %llu (%8lu.%8lu)\n"
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"Ack ISRs : %llu\n"
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"IO Cmpl ISRs : %llu\n"
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"Err Notify ISRs : %llu\n"
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"Max CQ Entries : %lld\n"
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"Data Count Mismatch : %lld\n"
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"IOs w/ Timeout Status : %lld\n"
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"IOs w/ Aborted Status : %lld\n"
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"IOs w/ SGL Invalid Stat : %lld\n"
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"WQ Desc Alloc Fail : %lld\n"
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"Queue Full : %lld\n"
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"Queue Ramp Up : %lld\n"
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"Queue Ramp Down : %lld\n"
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"Queue Last Queue Depth : %lld\n"
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"Target Not Ready : %lld\n",
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(u64) stats->misc.last_isr_time,
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last_isr_tms.tv_sec, last_isr_tms.tv_nsec,
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(u64)stats->misc.last_ack_time,
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last_ack_tms.tv_sec, last_ack_tms.tv_nsec,
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(u64) atomic64_read(&stats->misc.ack_isr_cnt),
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(u64) atomic64_read(&stats->misc.cmpl_isr_cnt),
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(u64) atomic64_read(&stats->misc.errnotify_isr_cnt),
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(u64) atomic64_read(&stats->misc.max_cq_ents),
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(u64) atomic64_read(&stats->misc.data_cnt_mismat),
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(u64) atomic64_read(&stats->misc.io_tmo),
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(u64) atomic64_read(&stats->misc.io_aborted),
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(u64) atomic64_read(&stats->misc.sgl_inval),
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(u64) atomic64_read(&stats->misc.wq_alloc_fail),
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(u64) atomic64_read(&stats->misc.qfull),
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(u64) atomic64_read(&stats->misc.qsz_rampup),
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(u64) atomic64_read(&stats->misc.qsz_rampdown),
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(u64) atomic64_read(&stats->misc.last_qsz),
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(u64) atomic64_read(&stats->misc.tgt_not_rdy));
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return 0;
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}
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/*
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* snic_stats_open - Open the stats file for specific host
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*
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* Description:
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* This routine opens a debugfs file stats of specific host
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*/
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static int
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snic_stats_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, snic_stats_show, inode->i_private);
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}
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static const struct file_operations snic_stats_fops = {
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.owner = THIS_MODULE,
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.open = snic_stats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations snic_reset_stats_fops = {
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.owner = THIS_MODULE,
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.open = snic_reset_stats_open,
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.read = snic_reset_stats_read,
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.write = snic_reset_stats_write,
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.release = snic_reset_stats_release,
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};
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/*
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* snic_stats_init - Initialize stats struct and create stats file
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* per snic
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*
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* Description:
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* When debugfs is cofigured this routine sets up the stats file per snic
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* It will create file stats and reset_stats under statistics/host# directory
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* to log per snic stats
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*/
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int
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snic_stats_debugfs_init(struct snic *snic)
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{
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int rc = -1;
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char name[16];
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struct dentry *de = NULL;
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snprintf(name, sizeof(name), "host%d", snic->shost->host_no);
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if (!snic_glob->stats_root) {
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SNIC_DBG("snic_stats root doesn't exist\n");
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return rc;
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}
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de = debugfs_create_dir(name, snic_glob->stats_root);
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if (!de) {
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SNIC_DBG("Cannot create host directory\n");
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return rc;
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}
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snic->stats_host = de;
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de = debugfs_create_file("stats",
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S_IFREG|S_IRUGO,
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snic->stats_host,
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snic,
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&snic_stats_fops);
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if (!de) {
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SNIC_DBG("Cannot create host's stats file\n");
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return rc;
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}
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snic->stats_file = de;
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de = debugfs_create_file("reset_stats",
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S_IFREG|S_IRUGO|S_IWUSR,
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snic->stats_host,
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snic,
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&snic_reset_stats_fops);
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if (!de) {
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SNIC_DBG("Cannot create host's reset_stats file\n");
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return rc;
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}
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snic->reset_stats_file = de;
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rc = 0;
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return rc;
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} /* end of snic_stats_debugfs_init */
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/*
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* snic_stats_debugfs_remove - Tear down debugfs infrastructure of stats
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*
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* Description:
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* When Debufs is configured this routine removes debugfs file system
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* elements that are specific to to snic stats
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*/
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void
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snic_stats_debugfs_remove(struct snic *snic)
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{
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debugfs_remove(snic->stats_file);
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snic->stats_file = NULL;
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debugfs_remove(snic->reset_stats_file);
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snic->reset_stats_file = NULL;
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debugfs_remove(snic->stats_host);
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snic->stats_host = NULL;
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}
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/* Trace Facility related API */
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static void *
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snic_trc_seq_start(struct seq_file *sfp, loff_t *pos)
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{
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return &snic_glob->trc;
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}
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static void *
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snic_trc_seq_next(struct seq_file *sfp, void *data, loff_t *pos)
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{
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return NULL;
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}
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static void
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snic_trc_seq_stop(struct seq_file *sfp, void *data)
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{
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}
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#define SNIC_TRC_PBLEN 256
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static int
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snic_trc_seq_show(struct seq_file *sfp, void *data)
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{
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char buf[SNIC_TRC_PBLEN];
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if (snic_get_trc_data(buf, SNIC_TRC_PBLEN) > 0)
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seq_printf(sfp, "%s\n", buf);
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return 0;
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}
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static const struct seq_operations snic_trc_seq_ops = {
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.start = snic_trc_seq_start,
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.next = snic_trc_seq_next,
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.stop = snic_trc_seq_stop,
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|
.show = snic_trc_seq_show,
|
|
};
|
|
|
|
static int
|
|
snic_trc_open(struct inode *inode, struct file *filp)
|
|
{
|
|
return seq_open(filp, &snic_trc_seq_ops);
|
|
}
|
|
|
|
static const struct file_operations snic_trc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = snic_trc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release,
|
|
};
|
|
|
|
/*
|
|
* snic_trc_debugfs_init : creates trace/tracing_enable files for trace
|
|
* under debugfs
|
|
*/
|
|
int
|
|
snic_trc_debugfs_init(void)
|
|
{
|
|
struct dentry *de = NULL;
|
|
int ret = -1;
|
|
|
|
if (!snic_glob->trc_root) {
|
|
SNIC_ERR("Debugfs root directory for snic doesn't exist.\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
de = debugfs_create_bool("tracing_enable",
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
snic_glob->trc_root,
|
|
&snic_glob->trc.enable);
|
|
|
|
if (!de) {
|
|
SNIC_ERR("Can't create trace_enable file.\n");
|
|
|
|
return ret;
|
|
}
|
|
snic_glob->trc.trc_enable = de;
|
|
|
|
de = debugfs_create_file("trace",
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
snic_glob->trc_root,
|
|
NULL,
|
|
&snic_trc_fops);
|
|
|
|
if (!de) {
|
|
SNIC_ERR("Cann't create trace file.\n");
|
|
|
|
return ret;
|
|
}
|
|
snic_glob->trc.trc_file = de;
|
|
ret = 0;
|
|
|
|
return ret;
|
|
} /* end of snic_trc_debugfs_init */
|
|
|
|
/*
|
|
* snic_trc_debugfs_term : cleans up the files created for trace under debugfs
|
|
*/
|
|
void
|
|
snic_trc_debugfs_term(void)
|
|
{
|
|
debugfs_remove(snic_glob->trc.trc_file);
|
|
snic_glob->trc.trc_file = NULL;
|
|
|
|
debugfs_remove(snic_glob->trc.trc_enable);
|
|
snic_glob->trc.trc_enable = NULL;
|
|
}
|