These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / scsi / snic / snic_stats.h

diff --git a/kernel/drivers/scsi/snic/snic_stats.h b/kernel/drivers/scsi/snic/snic_stats.h
new file mode 100644 (file)
index 0000000..11e6148
--- /dev/null
+++ b/kernel/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 */