linux-kernel - Re: [PATCH v1 3/3] scsi: ufs: Introduce notify

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Message-ID: <b8d2d4e45e1738865925de17d53dcaa7@codeaurora.org>
Date:   Thu, 03 Dec 2020 13:49:05 +0800
From:   Can Guo <cang@...eaurora.org>
To:     Stanley Chu <stanley.chu@...iatek.com>
Cc:     linux-scsi@...r.kernel.org, martin.petersen@...cle.com,
        avri.altman@....com, alim.akhtar@...sung.com, jejb@...ux.ibm.com,
        beanhuo@...ron.com, asutoshd@...eaurora.org,
        matthias.bgg@...il.com, bvanassche@....org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kuohong.wang@...iatek.com, peter.wang@...iatek.com,
        chun-hung.wu@...iatek.com, andy.teng@...iatek.com,
        chaotian.jing@...iatek.com, cc.chou@...iatek.com,
        jiajie.hao@...iatek.com, alice.chao@...iatek.com,
        huadian.liu@...iatek.com
Subject: Re: [PATCH v1 3/3] scsi: ufs: Introduce notify_event variant function

On 2020-11-26 13:38, Stanley Chu wrote:
> Introduce notify_event variant function to allow
> vendor to get notified of important events and connect
> to any proprietary debugging facilities.
> 
> Signed-off-by: Stanley Chu <stanley.chu@...iatek.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 7194bed1f10b..63fe37e1c908 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -4484,6 +4484,8 @@ 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_notify_event(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 82c2fc5597bb..a81ca36c1715 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -317,6 +317,7 @@ 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
> + * @notify_event: called to notify important events
>   */
>  struct ufs_hba_variant_ops {
>  	const char *name;
> @@ -352,6 +353,8 @@ struct ufs_hba_variant_ops {
>  					void *data);
>  	int	(*program_key)(struct ufs_hba *hba,
>  			       const union ufs_crypto_cfg_entry *cfg, int slot);
> +	void	(*notify_event)(struct ufs_hba *hba,
> +				enum ufs_event_type evt, void *data);
>  };
> 
>  /* clock gating state  */
> @@ -1097,6 +1100,14 @@ static inline int
> ufshcd_vops_clk_scale_notify(struct ufs_hba *hba,
>  	return 0;
>  }
> 
> +static inline void ufshcd_vops_notify_event(struct ufs_hba *hba,
> +					    enum ufs_event_type evt,
> +					    void *data)
> +{
> +	if (hba->vops && hba->vops->notify_event)
> +		hba->vops->notify_event(hba, evt, data);
> +}
> +
>  static inline int ufshcd_vops_setup_clocks(struct ufs_hba *hba, bool 
> on,
>  					enum ufs_notify_change_status status)
>  {

Reviewed-by: Can Guo <cang@...eaurora.org>