snic_stats.h contains stats structre definitions for various events
in snic driver.
snic_debugfs.c contains setup and cleanup of sysfs entries for listing stats,
resetting stats, enabling/disabling trace, and listing trace data.
Signed-off-by: Narsimhulu Musini <nmusini@xxxxxxxxx>
Signed-off-by: Sesidhar Baddela <sebaddel@xxxxxxxxx>
---
drivers/scsi/snic/snic_debugfs.c | 562 +++++++++++++++++++++++++++++++++++++++
drivers/scsi/snic/snic_stats.h | 123 +++++++++
2 files changed, 685 insertions(+)
create mode 100644 drivers/scsi/snic/snic_debugfs.c
create mode 100644 drivers/scsi/snic/snic_stats.h
diff --git a/drivers/scsi/snic/snic_debugfs.c b/drivers/scsi/snic/snic_debugfs.c
new file mode 100644
index 0000000..31b2642
--- /dev/null
+++ b/drivers/scsi/snic/snic_debugfs.c
@@ -0,0 +1,562 @@
+/*
+ * Copyright 2014 Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/debugfs.h>
+
+#include "snic.h"
+
+/*
+ * snic_debugfs_init - Initialize debugfs for snic debug logging
+ *
+ * Description:
+ * When Debugfs is configured this routine sets up fnic debugfs
+ * filesystem. If not already created. this routine will crate the
+ * fnic directory and statistics directory for trace buffer and
+ * stats logging
+ */
+
+int
+snic_debugfs_init(void)
+{
+ int rc = -1;
+ struct dentry *de = NULL;
+
+ de = debugfs_create_dir("snic", NULL);
+ if (!de) {
+ SNIC_DBG("Cannot create debugfs root\n");
+
+ return rc;
+ }
+ snic_glob->trc_root = de;
+
+ de = debugfs_create_dir("statistics", snic_glob->trc_root);
+ if (!de) {
+ SNIC_DBG("Cannot create Statistics directory\n");
+
+ return rc;
+ }
+ snic_glob->stats_root = de;
+
+ rc = 0;
+
+ return rc;
+} /* end of snic_debugfs_init */
+
+/*
+ * snic_debugfs_term - Tear down debugfs intrastructure
+ *
+ * Description:
+ * When Debufs is configured this routine removes debugfs file system
+ * elements that are specific to snic
+ */
+void
+snic_debugfs_term(void)
+{
+ debugfs_remove(snic_glob->stats_root);
+ snic_glob->stats_root = NULL;
+
+ debugfs_remove(snic_glob->trc_root);
+ snic_glob->trc_root = NULL;
+}
+
+/*
+ * snic_reset_stats_open - Open the reset_stats file
+ */
+static int
+snic_reset_stats_open(struct inode *inode, struct file *filp)
+{
+ SNIC_BUG_ON(!inode->i_private);
+ filp->private_data = inode->i_private;
+
+ return 0;
+}
+
+/*
+ * snic_reset_stats_read - Read a reset_stats debugfs file
+ * @filp: The file pointer to read from.
+ * @ubuf: The buffer tocopy the data to.
+ * @cnt: The number of bytes to read.
+ * @ppos: The position in the file to start reading frm.
+ *
+ * Description:
+ * This routine reads value of variable reset_stats
+ * and stores into local @buf. It will start reading file @ppos and
+ * copy up to @cnt of data to @ubuf from @buf.
+ *
+ * Returns:
+ * This function returns the amount of data that was read.
+ */
+static ssize_t
+snic_reset_stats_read(struct file *filp,
+ char __user *ubuf,
+ size_t cnt,
+ loff_t *ppos)
+{
+ struct snic *snic = (struct snic *) filp->private_data;
+ char buf[64];
+ int len;
+
+ len = sprintf(buf, "%u\n", snic->reset_stats);
+
+ return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
+}
+
+/*
+ * snic_reset_stats_write - Write to reset_stats debugfs file
+ * @filp: The file pointer to write from
+ * @ubuf: The buffer to copy the data from.
+ * @cnt: The number of bytes to write.
+ * @ppos: The position in the file to start writing to.
+ *
+ * Description:
+ * This routine writes data from user buffer @ubuf to buffer @buf and
+ * resets cumulative stats of snic.
+ *
+ * Returns:
+ * This function returns the amount of data that was written.
+ */
+static ssize_t
+snic_reset_stats_write(struct file *filp,
+ const char __user *ubuf,
+ size_t cnt,
+ loff_t *ppos)
+{
+ struct snic *snic = (struct snic *) filp->private_data;
+ struct snic_stats *stats = &snic->s_stats;
+ u64 *io_stats_p = (u64 *) &stats->io;
+ u64 *fw_stats_p = (u64 *) &stats->fw;
+ char buf[64];
+ unsigned long val;
+ int ret;
+
+ if (cnt >= sizeof(buf))
+ return -EINVAL;
+
+ if (copy_from_user(&buf, ubuf, cnt))
+ return -EFAULT;
+
+ /* TODO: null character and not 0 */
+ buf[cnt] = 0;
+
+ ret = kstrtoul(buf, 10, &val);
+ if (ret < 0)
+ return ret;
+
+ snic->reset_stats = val;
+
+ if (snic->reset_stats) {
+ /* Skip variable is used to avoid descrepancies to Num IOs
+ * and IO Completions stats. Skip incrementing No IO Compls
+ * for pending active IOs after reset_stats
+ */
+ atomic64_set(&snic->io_cmpl_skip,
+ atomic64_read(&stats->io.active));
+ memset(&stats->abts, 0, sizeof(struct snic_abort_stats));
+ memset(&stats->reset, 0, sizeof(struct snic_reset_stats));
+ memset(&stats->misc, 0, sizeof(struct snic_misc_stats));
+ memset(io_stats_p+1,
+ 0,
+ sizeof(struct snic_io_stats) - sizeof(u64));
+ memset(fw_stats_p+1,
+ 0,
+ sizeof(struct snic_fw_stats) - sizeof(u64));
+ }
+
+ (*ppos)++;
+
+ SNIC_HOST_INFO(snic->shost, "Reset Op: Driver statistics.\n");
+
+ return cnt;
+}
+
+static int
+snic_reset_stats_release(struct inode *inode, struct file *filp)
+{
+ filp->private_data = NULL;
+
+ return 0;
+}
+
+/*
+ * snic_stats_show - Formats and prints per host specific driver stats.
+ */
+static int
+snic_stats_show(struct seq_file *sfp, void *data)
+{
+ struct snic *snic = (struct snic *) sfp->private;
+ struct snic_stats *stats = &snic->s_stats;
+ struct timespec last_isr_tms, last_ack_tms;
+ u64 maxio_tm;
+ int i;
+
+ /* Dump IO Stats */
+ seq_printf(sfp,
+ "------------------------------------------\n"
+ "\t\t IO Statistics\n"
+ "------------------------------------------\n");
+
+ maxio_tm = (u64) atomic64_read(&stats->io.max_time);
+ seq_printf(sfp,
+ "Active IOs : %lld\n"
+ "Max Active IOs : %lld\n"
+ "Total IOs : %lld\n"
+ "IOs Completed : %lld\n"
+ "IOs Failed : %lld\n"
+ "IOs Not Found : %lld\n"
+ "Memory Alloc Failures : %lld\n"
+ "REQs Null : %lld\n"
+ "SCSI Cmd Pointers Null : %lld\n"
+ "Max SGL for any IO : %lld\n"
+ "Max IO Size : %lld Sectors\n"
+ "Max Queuing Time : %lld\n"
+ "Max Completion Time : %lld\n"
+ "Max IO Process Time(FW) : %lld (%u msec)\n",
+ (u64) atomic64_read(&stats->io.active),
+ (u64) atomic64_read(&stats->io.max_active),
+ (u64) atomic64_read(&stats->io.num_ios),
+ (u64) atomic64_read(&stats->io.compl),
+ (u64) atomic64_read(&stats->io.fail),
+ (u64) atomic64_read(&stats->io.io_not_found),
+ (u64) atomic64_read(&stats->io.alloc_fail),
+ (u64) atomic64_read(&stats->io.req_null),
+ (u64) atomic64_read(&stats->io.sc_null),
+ (u64) atomic64_read(&stats->io.max_sgl),
+ (u64) atomic64_read(&stats->io.max_io_sz),
+ (u64) atomic64_read(&stats->io.max_qtime),
+ (u64) atomic64_read(&stats->io.max_cmpl_time),
+ maxio_tm,
+ jiffies_to_msecs(maxio_tm));
+
+ seq_puts(sfp, "\nSGL Counters\n");
+
+ for (i = 0; i < SNIC_MAX_SG_DESC_CNT; i++) {
+ seq_printf(sfp,
+ "%10lld ",
+ (u64) atomic64_read(&stats->io.sgl_cnt[i]));
+
+ if ((i + 1) % 8 == 0)
+ seq_puts(sfp, "\n");
+ }
+
+ /* Dump Abort Stats */
+ seq_printf(sfp,
+ "\n-------------------------------------------\n"
+ "\t\t Abort Statistics\n"
+ "---------------------------------------------\n");
+
+ seq_printf(sfp,
+ "Aborts : %lld\n"
+ "Aborts Fail : %lld\n"
+ "Aborts Driver Timeout : %lld\n"
+ "Abort FW Timeout : %lld\n"
+ "Abort IO NOT Found : %lld\n",
+ (u64) atomic64_read(&stats->abts.num),
+ (u64) atomic64_read(&stats->abts.fail),
+ (u64) atomic64_read(&stats->abts.drv_tmo),
+ (u64) atomic64_read(&stats->abts.fw_tmo),
+ (u64) atomic64_read(&stats->abts.io_not_found));
+
+ /* Dump Reset Stats */
+ seq_printf(sfp,
+ "\n-------------------------------------------\n"
+ "\t\t Reset Statistics\n"
+ "---------------------------------------------\n");
+
+ seq_printf(sfp,
+ "HBA Resets : %lld\n"
+ "HBA Reset Cmpls : %lld\n"
+ "HBA Reset Fail : %lld\n",
+ (u64) atomic64_read(&stats->reset.hba_resets),
+ (u64) atomic64_read(&stats->reset.hba_reset_cmpl),
+ (u64) atomic64_read(&stats->reset.hba_reset_fail));
+
+ /* Dump Firmware Stats */
+ seq_printf(sfp,
+ "\n-------------------------------------------\n"
+ "\t\t Firmware Statistics\n"
+ "---------------------------------------------\n");
+
+ seq_printf(sfp,
+ "Active FW Requests : %lld\n"
+ "Max FW Requests : %lld\n"
+ "FW Out Of Resource Errs : %lld\n"
+ "FW IO Errors : %lld\n"
+ "FW SCSI Errors : %lld\n",
+ (u64) atomic64_read(&stats->fw.actv_reqs),
+ (u64) atomic64_read(&stats->fw.max_actv_reqs),
+ (u64) atomic64_read(&stats->fw.out_of_res),
+ (u64) atomic64_read(&stats->fw.io_errs),
+ (u64) atomic64_read(&stats->fw.scsi_errs));
+
+
+ /* Dump Miscellenous Stats */
+ seq_printf(sfp,
+ "\n---------------------------------------------\n"
+ "\t\t Other Statistics\n"
+ "\n---------------------------------------------\n");
+
+ jiffies_to_timespec(stats->misc.last_isr_time, &last_isr_tms);
+ jiffies_to_timespec(stats->misc.last_ack_time, &last_ack_tms);
+
+ seq_printf(sfp,
+ "Last ISR Time : %llu (%8lu.%8lu)\n"
+ "Last Ack Time : %llu (%8lu.%8lu)\n"
+ "ISRs : %llu\n"
+ "Max CQ Entries : %lld\n"
+ "Data Count Mismatch : %lld\n"
+ "IOs w/ Timeout Status : %lld\n"
+ "IOs w/ Aborted Status : %lld\n"
+ "IOs w/ SGL Invalid Stat : %lld\n"
+ "WQ Desc Alloc Fail : %lld\n"
+ "Queue Full : %lld\n"
+ "Target Not Ready : %lld\n",
+ (u64) stats->misc.last_isr_time,
+ last_isr_tms.tv_sec, last_isr_tms.tv_nsec,
+ (u64)stats->misc.last_ack_time,
+ last_ack_tms.tv_sec, last_ack_tms.tv_nsec,
+ (u64) atomic64_read(&stats->misc.isr_cnt),
+ (u64) atomic64_read(&stats->misc.max_cq_ents),
+ (u64) atomic64_read(&stats->misc.data_cnt_mismat),
+ (u64) atomic64_read(&stats->misc.io_tmo),
+ (u64) atomic64_read(&stats->misc.io_aborted),
+ (u64) atomic64_read(&stats->misc.sgl_inval),
+ (u64) atomic64_read(&stats->misc.wq_alloc_fail),
+ (u64) atomic64_read(&stats->misc.qfull),
+ (u64) atomic64_read(&stats->misc.tgt_not_rdy));
+
+ return 0;
+}
+
+/*
+ * snic_stats_open - Open the stats file for specific host
+ *
+ * Description:
+ * This routine opens a debugfs file stats of specific host
+ */
+static int
+snic_stats_open(struct inode *inode, struct file *filp)
+{
+ return single_open(filp, snic_stats_show, inode->i_private);
+}
+
+static const struct file_operations snic_stats_fops __read_mostly = {
+ .owner = THIS_MODULE,
+ .open = snic_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations snic_reset_stats_fops __read_mostly = {
+ .owner = THIS_MODULE,
+ .open = snic_reset_stats_open,
+ .read = snic_reset_stats_read,
+ .write = snic_reset_stats_write,
+ .release = snic_reset_stats_release,
+};
+
+/*
+ * snic_stats_init - Initialize stats struct and create stats file
+ * per snic
+ *
+ * Description:
+ * When debugfs is cofigured this routine sets up the stats file per snic
+ * It will create file stats and reset_stats under statistics/host# directory
+ * to log per snic stats
+ */
+int
+snic_stats_debugfs_init(struct snic *snic)
+{
+ int rc = -1;
+ char name[16];
+ struct dentry *de = NULL;
+
+ snprintf(name, sizeof(name), "host%d", snic->shost->host_no);
+ if (!snic_glob->stats_root) {
+ SNIC_DBG("snic_stats root doesn't exist\n");
+
+ return rc;
+ }
+
+ de = debugfs_create_dir(name, snic_glob->stats_root);
+ if (!de) {
+ SNIC_DBG("Cannot create host directory\n");
+
+ return rc;
+ }
+ snic->stats_host = de;
+
+ /* TODO: do we need write permissions ?? */
+ de = debugfs_create_file("stats",
+ S_IFREG|S_IRUGO|S_IWUSR,
+ snic->stats_host,
+ snic,
+ &snic_stats_fops);
+ if (!de) {
+ SNIC_DBG("Cannot create host's stats file\n");
+
+ return rc;
+ }
+ snic->stats_file = de;
+
+ de = debugfs_create_file("reset_stats",
+ S_IFREG|S_IRUGO|S_IWUSR,
+ snic->stats_host,
+ snic,
+ &snic_reset_stats_fops);
+
+ if (!de) {
+ SNIC_DBG("Cannot create host's reset_stats file\n");
+
+ return rc;
+ }
+ snic->reset_stats_file = de;
+ rc = 0;
+
+ return rc;
+} /* end of snic_stats_debugfs_init */
+
+/*
+ * snic_stats_debugfs_remove - Tear down debugfs infrastructure of stats
+ *
+ * Description:
+ * When Debufs is configured this routine removes debugfs file system
+ * elements that are specific to to snic stats
+ */
+void
+snic_stats_debugfs_remove(struct snic *snic)
+{
+ debugfs_remove(snic->stats_file);
+ snic->stats_file = NULL;
+
+ debugfs_remove(snic->reset_stats_file);
+ snic->reset_stats_file = NULL;
+
+ debugfs_remove(snic->stats_host);
+ snic->stats_host = NULL;
+}
+
+/* Trace Facility related API */
+static void *
+snic_trc_seq_start(struct seq_file *sfp, loff_t *pos)
+{
+ return &snic_glob->trc;
+}
+
+static void *
+snic_trc_seq_next(struct seq_file *sfp, void *data, loff_t *pos)
+{
+ return NULL;
+}
+
+static void
+snic_trc_seq_stop(struct seq_file *sfp, void *data)
+{
+}
+
+#define SNIC_TRC_PBLEN 256
+static int
+snic_trc_seq_show(struct seq_file *sfp, void *data)
+{
+ char buf[SNIC_TRC_PBLEN];
+
+ if (snic_get_trc_data(buf, SNIC_TRC_PBLEN) > 0)
+ seq_printf(sfp, "%s\n", buf);
+
+ return 0;
+}
+
+static const struct seq_operations snic_trc_seq_ops __read_mostly = {
+ .start = snic_trc_seq_start,
+ .next = snic_trc_seq_next,
+ .stop = snic_trc_seq_stop,
+ .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 __read_mostly = {
+ .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;
+}
diff --git a/drivers/scsi/snic/snic_stats.h b/drivers/scsi/snic/snic_stats.h
new file mode 100644
index 0000000..11e6148
--- /dev/null
+++ b/drivers/scsi/snic/snic_stats.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2014 Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __SNIC_STATS_H
+#define __SNIC_STATS_H
+
+struct snic_io_stats {
+ atomic64_t active; /* Active IOs */
+ atomic64_t max_active; /* Max # active IOs */
+ atomic64_t max_sgl; /* Max # SGLs for any IO */
+ atomic64_t max_time; /* Max time to process IO */
+ atomic64_t max_qtime; /* Max time to Queue the IO */
+ atomic64_t max_cmpl_time; /* Max time to complete the IO */
+ atomic64_t sgl_cnt[SNIC_MAX_SG_DESC_CNT]; /* SGL Counters */
+ atomic64_t max_io_sz; /* Max IO Size */
+ atomic64_t compl; /* IO Completions */
+ atomic64_t fail; /* IO Failures */
+ atomic64_t req_null; /* req or req info is NULL */
+ atomic64_t alloc_fail; /* Alloc Failures */
+ atomic64_t sc_null;
+ atomic64_t io_not_found; /* IO Not Found */
+ atomic64_t num_ios; /* Number of IOs */
+};
+
+struct snic_abort_stats {
+ atomic64_t num; /* Abort counter */
+ atomic64_t fail; /* Abort Failure Counter */
+ atomic64_t drv_tmo; /* Abort Driver Timeouts */
+ atomic64_t fw_tmo; /* Abort Firmware Timeouts */
+ atomic64_t io_not_found;/* Abort IO Not Found */
+};
+
+struct snic_reset_stats {
+ atomic64_t dev_resets; /* Device Reset Counter */
+ atomic64_t dev_reset_fail; /* Device Reset Failures */
+ atomic64_t dev_reset_aborts; /* Device Reset Aborts */
+ atomic64_t dev_reset_tmo; /* Device Reset Timeout */
+ atomic64_t dev_reset_terms; /* Device Reset terminate */
+ atomic64_t hba_resets; /* hba/firmware resets */
+ atomic64_t hba_reset_cmpl; /* hba/firmware reset completions */
+ atomic64_t hba_reset_fail; /* hba/firmware failures */
+ atomic64_t snic_resets; /* snic resets */
+ atomic64_t snic_reset_compl; /* snic reset completions */
+ atomic64_t snic_reset_fail; /* snic reset failures */
+};
+
+struct snic_fw_stats {
+ atomic64_t actv_reqs; /* Active Requests */
+ atomic64_t max_actv_reqs; /* Max Active Requests */
+ atomic64_t out_of_res; /* Firmware Out Of Resources */
+ atomic64_t io_errs; /* Firmware IO Firmware Errors */
+ atomic64_t scsi_errs; /* Target hits check condition */
+};
+
+struct snic_misc_stats {
+ u64 last_isr_time;
+ u64 last_ack_time;
+ atomic64_t isr_cnt;
+ atomic64_t max_cq_ents; /* Max CQ Entries */
+ atomic64_t data_cnt_mismat; /* Data Count Mismatch */
+ atomic64_t io_tmo;
+ atomic64_t io_aborted;
+ atomic64_t sgl_inval; /* SGL Invalid */
+ atomic64_t abts_wq_alloc_fail; /* Abort Path WQ desc alloc failure */
+ atomic64_t devrst_wq_alloc_fail;/* Device Reset - WQ desc alloc fail */
+ atomic64_t wq_alloc_fail; /* IO WQ desc alloc failure */
+ atomic64_t no_icmnd_itmf_cmpls;
+ atomic64_t io_under_run;
+ atomic64_t qfull;
+ atomic64_t tgt_not_rdy;
+};
+
+struct snic_stats {
+ struct snic_io_stats io;
+ struct snic_abort_stats abts;
+ struct snic_reset_stats reset;
+ struct snic_fw_stats fw;
+ struct snic_misc_stats misc;
+ atomic64_t io_cmpl_skip;
+};
+
+int snic_stats_debugfs_init(struct snic *);
+void snic_stats_debugfs_remove(struct snic *);
+
+/* Auxillary function to update active IO counter */
+static inline void
+snic_stats_update_active_ios(struct snic_stats *s_stats)
+{
+ struct snic_io_stats *io = &s_stats->io;
+ u32 nr_active_ios;
+
+ nr_active_ios = atomic64_inc_return(&io->active);
+ if (atomic64_read(&io->max_active) < nr_active_ios)
+ atomic64_set(&io->max_active, nr_active_ios);
+
+ atomic64_inc(&io->num_ios);
+}
+
+/* Auxillary function to update IO completion counter */
+static inline void
+snic_stats_update_io_cmpl(struct snic_stats *s_stats)
+{
+ atomic64_dec(&s_stats->io.active);
+ if (unlikely(atomic64_read(&s_stats->io_cmpl_skip)))
+ atomic64_dec(&s_stats->io_cmpl_skip);
+ else
+ atomic64_inc(&s_stats->io.compl);
+}
+#endif /* __SNIC_STATS_H */
--
1.8.5.4
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