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    Subject[PATCH v3 7/8] scsi: ufs: Introduce event_notify variant function
    Date
    Introduce event_notify variant function to allow
    vendor to get notification of important events and connect
    to any proprietary debugging facilities.

    Reviewed-by: Can Guo <cang@codeaurora.org>
    Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
    ---
    drivers/scsi/ufs/ufshcd.c | 2 ++
    drivers/scsi/ufs/ufshcd.h | 11 +++++++++++
    2 files changed, 13 insertions(+)

    diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
    index 1a7d31849511..6e72c0543c7b 100644
    --- a/drivers/scsi/ufs/ufshcd.c
    +++ b/drivers/scsi/ufs/ufshcd.c
    @@ -4480,6 +4480,8 @@ void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32 val)
    e->val[e->pos] = val;
    e->tstamp[e->pos] = ktime_get();
    e->pos = (e->pos + 1) % UFS_EVENT_HIST_LENGTH;
    +
    + ufshcd_vops_event_notify(hba, id, &val);
    }
    EXPORT_SYMBOL_GPL(ufshcd_update_evt_hist);

    diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
    index b55a71c10fa6..8c44929bed53 100644
    --- a/drivers/scsi/ufs/ufshcd.h
    +++ b/drivers/scsi/ufs/ufshcd.h
    @@ -319,6 +319,7 @@ struct ufs_pwr_mode_info {
    * @phy_initialization: used to initialize phys
    * @device_reset: called to issue a reset pulse on the UFS device
    * @program_key: program or evict an inline encryption key
    + * @event_notify: called to notify important events
    */
    struct ufs_hba_variant_ops {
    const char *name;
    @@ -353,6 +354,8 @@ struct ufs_hba_variant_ops {
    void *data);
    int (*program_key)(struct ufs_hba *hba,
    const union ufs_crypto_cfg_entry *cfg, int slot);
    + void (*event_notify)(struct ufs_hba *hba,
    + enum ufs_event_type evt, void *data);
    };

    /* clock gating state */
    @@ -1100,6 +1103,14 @@ static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba,
    return 0;
    }

    +static inline void ufshcd_vops_event_notify(struct ufs_hba *hba,
    + enum ufs_event_type evt,
    + void *data)
    +{
    + if (hba->vops && hba->vops->event_notify)
    + hba->vops->event_notify(hba, evt, data);
    +}
    +
    static inline int ufshcd_vops_setup_clocks(struct ufs_hba *hba, bool on,
    enum ufs_notify_change_status status)
    {
    --
    2.18.0
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