/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright 2014 Cisco Systems, Inc.  All rights reserved. */

#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 */
        atomic64_t q_fail;      /* Abort Queuing Failed */
};

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 ack_isr_cnt;
        atomic64_t cmpl_isr_cnt;
        atomic64_t errnotify_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 qsz_rampup;
        atomic64_t qsz_rampdown;
        atomic64_t last_qsz;
        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;
};

void 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;
        int nr_active_ios;

        nr_active_ios = atomic64_read(&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 */