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479 lines
14 KiB
479 lines
14 KiB
/* |
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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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|
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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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void snic_debugfs_init(void) |
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{ |
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snic_glob->trc_root = debugfs_create_dir("snic", NULL); |
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snic_glob->stats_root = debugfs_create_dir("statistics", |
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snic_glob->trc_root); |
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} |
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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 timespec64 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_timespec64(stats->misc.last_isr_time, &last_isr_tms); |
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jiffies_to_timespec64(stats->misc.last_ack_time, &last_ack_tms); |
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seq_printf(sfp, |
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"Last ISR Time : %llu (%8llu.%09lu)\n" |
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"Last Ack Time : %llu (%8llu.%09lu)\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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void snic_stats_debugfs_init(struct snic *snic) |
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{ |
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char name[16]; |
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snprintf(name, sizeof(name), "host%d", snic->shost->host_no); |
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snic->stats_host = debugfs_create_dir(name, snic_glob->stats_root); |
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snic->stats_file = debugfs_create_file("stats", S_IFREG|S_IRUGO, |
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snic->stats_host, snic, |
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&snic_stats_fops); |
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snic->reset_stats_file = debugfs_create_file("reset_stats", |
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S_IFREG|S_IRUGO|S_IWUSR, |
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snic->stats_host, snic, |
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&snic_reset_stats_fops); |
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} |
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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_sops = { |
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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, |
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}; |
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DEFINE_SEQ_ATTRIBUTE(snic_trc); |
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/* |
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* snic_trc_debugfs_init : creates trace/tracing_enable files for trace |
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* under debugfs |
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*/ |
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void snic_trc_debugfs_init(void) |
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{ |
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snic_glob->trc.trc_enable = debugfs_create_bool("tracing_enable", |
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S_IFREG | S_IRUGO | S_IWUSR, |
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snic_glob->trc_root, |
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&snic_glob->trc.enable); |
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snic_glob->trc.trc_file = debugfs_create_file("trace", |
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S_IFREG | S_IRUGO | S_IWUSR, |
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snic_glob->trc_root, NULL, |
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&snic_trc_fops); |
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} |
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/* |
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* snic_trc_debugfs_term : cleans up the files created for trace under debugfs |
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*/ |
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void |
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snic_trc_debugfs_term(void) |
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{ |
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debugfs_remove(snic_glob->trc.trc_file); |
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snic_glob->trc.trc_file = NULL; |
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debugfs_remove(snic_glob->trc.trc_enable); |
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snic_glob->trc.trc_enable = NULL; |
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}
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