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Date: Wed, 13 Apr 2022 11:53:49 +0800
From: Peter Wang <peter.wang@...iatek.com>
To: Bean Huo <huobean@...il.com>, Po-Wen Kao <powen.kao@...iatek.com>,
"Alim Akhtar" <alim.akhtar@...sung.com>,
Avri Altman <avri.altman@....com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Matthias Brugger <matthias.bgg@...il.com>
CC: <wsd_upstream@...iatek.com>, <stanley.chu@...iatek.com>,
<alice.chao@...iatek.com>, <chun-hung.wu@...iatek.com>,
<cc.chou@...iatek.com>, <chaotian.jing@...iatek.com>,
<jiajie.hao@...iatek.com>, <yohan.joung@...com>, <jason.li@...com>,
<linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH 1/1] scsi: ufs: remove redundant HPB unmap
Hi Bean,
How about if reset flow not clear hpb mapping?
After device is reset by RST_N pin, if the hpb mapping table still exist?
BTW, Host seem not clear region mapping table in reset flow.
Thanks.
On 4/12/22 11:20 PM, Bean Huo wrote:
> Hi, Po-Wen,
> Previous email did not properly append the patch, this one is better
> for your review and test.
>
>
>
>
> From: Bean Huo <beanhuo@...ron.com>
> Date: Tue, 12 Apr 2022 16:56:34 +0200
> Subject: [PATCH] scsi: ufshpb: UFSHPB cleanup
>
> Remove redundant ufshpb_reset*, and merge into a single helper
> ufshbp_state_toggle().
>
> Delete the redundant Inactivation code of all HPB Regions in the cold
> boot stage,
> and add inactivating all HPB Regions when the HPP status changes from
> HPB_RESET
> to HBP_PRESENT.
>
> Signed-off-by: Bean Huo <beanhuo@...ron.com>
> ---
> drivers/scsi/ufs/ufshcd.c | 4 ++--
> drivers/scsi/ufs/ufshpb.c | 38 +++++++++++++-------------------------
> drivers/scsi/ufs/ufshpb.h | 6 ++----
> 3 files changed, 17 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 0899d5b8cdad..d8b59d017ce4 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -7223,7 +7223,7 @@ static int ufshcd_host_reset_and_restore(struct
> ufs_hba *hba)
> * Stop the host controller and complete the requests
> * cleared by h/w
> */
> - ufshpb_reset_host(hba);
> + ufshpb_state_toggle(hba, HPB_RESET);
> ufshcd_hba_stop(hba);
> hba->silence_err_logs = true;
> ufshcd_complete_requests(hba);
> @@ -8184,7 +8184,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba,
> bool init_dev_params)
> /* Enable Auto-Hibernate if configured */
> ufshcd_auto_hibern8_enable(hba);
>
> - ufshpb_reset(hba);
> + ufshpb_state_toggle(hba, HPB_PRESENT);
> out:
> spin_lock_irqsave(hba->host->host_lock, flags);
> if (ret)
> diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
> index 3ca745ad616c..4ed156031413 100644
> --- a/drivers/scsi/ufs/ufshpb.c
> +++ b/drivers/scsi/ufs/ufshpb.c
> @@ -2278,39 +2278,29 @@ static bool ufshpb_check_hpb_reset_query(struct
> ufs_hba *hba)
> return flag_res;
> }
>
> -void ufshpb_reset(struct ufs_hba *hba)
> +void ufshpb_state_toggle(struct ufs_hba *hba, enum UFSHPB_STATE state)
> {
> struct ufshpb_lu *hpb;
> struct scsi_device *sdev;
>
> shost_for_each_device(sdev, hba->host) {
> hpb = ufshpb_get_hpb_data(sdev);
> - if (!hpb)
> - continue;
>
> - if (ufshpb_get_state(hpb) != HPB_RESET)
> + if (!hpb || ufshpb_get_state(hpb) != state)
> continue;
>
> - ufshpb_set_state(hpb, HPB_PRESENT);
> - }
> -}
> -
> -void ufshpb_reset_host(struct ufs_hba *hba)
> -{
> - struct ufshpb_lu *hpb;
> - struct scsi_device *sdev;
> -
> - shost_for_each_device(sdev, hba->host) {
> - hpb = ufshpb_get_hpb_data(sdev);
> - if (!hpb)
> - continue;
> -
> - if (ufshpb_get_state(hpb) != HPB_PRESENT)
> - continue;
> - ufshpb_set_state(hpb, HPB_RESET);
> - ufshpb_cancel_jobs(hpb);
> - ufshpb_discard_rsp_lists(hpb);
> + ufshpb_set_state(hpb, state);
> + if (state == HPB_RESET) {
> + ufshpb_cancel_jobs(hpb);
> + ufshpb_discard_rsp_lists(hpb);
> + }
> }
> + /*
> + * Inactivating all HPB Region in device side in case HPB
> state changed
> + * from HPB_RESET to HPB_PRESENT
> + */
> + if (!hpb->is_hcm && state == HPB_PRESENT)
may need check hpb is not null?
> + ufshpb_issue_umap_all_req(hpb);
> }
>
> void ufshpb_suspend(struct ufs_hba *hba)
> @@ -2456,8 +2446,6 @@ static void ufshpb_hpb_lu_prepared(struct ufs_hba
> *hba)
> ufshpb_set_state(hpb, HPB_PRESENT);
> if ((hpb->lu_pinned_end - hpb-
>> lu_pinned_start) > 0)
> queue_work(ufshpb_wq, &hpb->map_work);
> - if (!hpb->is_hcm)
> - ufshpb_issue_umap_all_req(hpb);
> } else {
> dev_err(hba->dev, "destroy HPB lu %d\n", hpb-
>> lun);
> ufshpb_destroy_lu(hba, sdev);
> diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h
> index b475dbd78988..a130f0b16c3e 100644
> --- a/drivers/scsi/ufs/ufshpb.h
> +++ b/drivers/scsi/ufs/ufshpb.h
> @@ -288,8 +288,7 @@ static int ufshpb_prep(struct ufs_hba *hba, struct
> ufshcd_lrb *lrbp) { return 0;
> static void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb
> *lrbp) {}
> static void ufshpb_resume(struct ufs_hba *hba) {}
> static void ufshpb_suspend(struct ufs_hba *hba) {}
> -static void ufshpb_reset(struct ufs_hba *hba) {}
> -static void ufshpb_reset_host(struct ufs_hba *hba) {}
> +static void ufshpb_state_toggle(struct ufs_hba *hba, enum UFSHPB_STATE
> state) {}
> static void ufshpb_init(struct ufs_hba *hba) {}
> static void ufshpb_init_hpb_lu(struct ufs_hba *hba, struct scsi_device
> *sdev) {}
> static void ufshpb_destroy_lu(struct ufs_hba *hba, struct scsi_device
> *sdev) {}
> @@ -303,8 +302,7 @@ int ufshpb_prep(struct ufs_hba *hba, struct
> ufshcd_lrb *lrbp);
> void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp);
> void ufshpb_resume(struct ufs_hba *hba);
> void ufshpb_suspend(struct ufs_hba *hba);
> -void ufshpb_reset(struct ufs_hba *hba);
> -void ufshpb_reset_host(struct ufs_hba *hba);
> +void ufshpb_state_toggle(struct ufs_hba *hba, enum UFSHPB_STATE
> state);
> void ufshpb_init(struct ufs_hba *hba);
> void ufshpb_init_hpb_lu(struct ufs_hba *hba, struct scsi_device
> *sdev);
> void ufshpb_destroy_lu(struct ufs_hba *hba, struct scsi_device *sdev);
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