Re: [PATCH 1/1] scsi: ufs: remove redundant HPB unmap
From: Bean Huo
Date: Tue Apr 12 2022 - 11:06:33 EST
On Tue, 2022-04-12 at 15:31 +0800, Po-Wen Kao wrote:
> Since the HPB mapping is already reset in ufshpb_init by setting
> flag QUERY_FLAG_IDN_HPB_RESET, there is no need doing so again in
> ufshpb_hpb_lu_prepared.
>
> This would also resolve the issue where HPB WRTIE BUFFER is issued
> before UAC being cleared.
>
> Signed-off-by: Po-Wen Kao <powen.kao@xxxxxxxxxxxx>
> ---
> drivers/scsi/ufs/ufshpb.c | 7 -------
> 1 file changed, 7 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
> index a86d0cc50de2..5c09d44c4bd5 100644
> --- a/drivers/scsi/ufs/ufshpb.c
> +++ b/drivers/scsi/ufs/ufshpb.c
> @@ -934,11 +934,6 @@ static int ufshpb_issue_umap_single_req(struct
> ufshpb_lu *hpb,
> return ufshpb_issue_umap_req(hpb, rgn, true);
> }
>
> -static int ufshpb_issue_umap_all_req(struct ufshpb_lu *hpb)
> -{
> - return ufshpb_issue_umap_req(hpb, NULL, false);
> -}
> -
> static void __ufshpb_evict_region(struct ufshpb_lu *hpb,
> struct ufshpb_region *rgn)
> {
> @@ -2459,8 +2454,6 @@ 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);
Hi Po-Wen,
Yes, it is redundant in this flow, but it is needed in the reset flow,
I built this cleanup patch, but don't know if it can fix the issue
where HPB WRTIE BUFFER is issued before UAC being cleared. would you
test on your platform? I will verify it on our UFS later.
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@xxxxxxxxxx>
---
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)
+ 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);