[v11,03/12] scsi: ufshpb: Transform set_dirty to iterate_rgn

Message ID 20210616112800.52963-4-avri.altman@wdc.com
State Superseded
Headers show
Series
  • Add Host control mode to HPB
Related show

Commit Message

Avri Altman June 16, 2021, 11:27 a.m.
Given a transfer length, set_dirty meticulously runs over all the
entries, across subregions and regions if needed. Currently its only use
is to mark dirty blocks, but soon HCM may profit from it as well, when
managing its read counters.

Signed-off-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
---
 drivers/scsi/ufs/ufshpb.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

Patch

diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
index 3fd9fd5cb43e..7db553769717 100644
--- a/drivers/scsi/ufs/ufshpb.c
+++ b/drivers/scsi/ufs/ufshpb.c
@@ -145,13 +145,14 @@  static bool ufshpb_is_hpb_rsp_valid(struct ufs_hba *hba,
 	return true;
 }
 
-static void ufshpb_set_ppn_dirty(struct ufshpb_lu *hpb, int rgn_idx,
-				 int srgn_idx, int srgn_offset, int cnt)
+static void ufshpb_iterate_rgn(struct ufshpb_lu *hpb, int rgn_idx, int srgn_idx,
+			       int srgn_offset, int cnt, bool set_dirty)
 {
 	struct ufshpb_region *rgn;
 	struct ufshpb_subregion *srgn;
 	int set_bit_len;
 	int bitmap_len;
+	unsigned long flags;
 
 next_srgn:
 	rgn = hpb->rgn_tbl + rgn_idx;
@@ -167,11 +168,14 @@  static void ufshpb_set_ppn_dirty(struct ufshpb_lu *hpb, int rgn_idx,
 	else
 		set_bit_len = cnt;
 
-	set_bit(RGN_FLAG_DIRTY, &rgn->rgn_flags);
+	if (set_dirty)
+		set_bit(RGN_FLAG_DIRTY, &rgn->rgn_flags);
 
-	if (rgn->rgn_state != HPB_RGN_INACTIVE &&
+	spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+	if (set_dirty && rgn->rgn_state != HPB_RGN_INACTIVE &&
 	    srgn->srgn_state == HPB_SRGN_VALID)
 		bitmap_set(srgn->mctx->ppn_dirty, srgn_offset, set_bit_len);
+	spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
 
 	srgn_offset = 0;
 	if (++srgn_idx == hpb->srgns_per_rgn) {
@@ -591,10 +595,8 @@  int ufshpb_prep(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
 
 	/* If command type is WRITE or DISCARD, set bitmap as drity */
 	if (ufshpb_is_write_or_discard(cmd)) {
-		spin_lock_irqsave(&hpb->rgn_state_lock, flags);
-		ufshpb_set_ppn_dirty(hpb, rgn_idx, srgn_idx, srgn_offset,
-				 transfer_len);
-		spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+		ufshpb_iterate_rgn(hpb, rgn_idx, srgn_idx, srgn_offset,
+				   transfer_len, true);
 		return 0;
 	}