Some SoC specific might need command history for
various reasons, such as stacking command contexts
in system memory to check for debugging in the future
or scaling some DVFS knobs to boost IO throughput.
What you would do with the information could be
variant per SoC vendor.
Signed-off-by: Kiwoong Kim <kwmad.kim@xxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 2 ++
drivers/scsi/ufs/ufshcd.h | 8 ++++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 52abe82..3326236 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4882,6 +4882,7 @@ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba,
for_each_set_bit(index, &completed_reqs, hba->nutrs) {
lrbp = &hba->lrb[index];
cmd = lrbp->cmd;
+ ufshcd_vops_compl_xfer_req(hba, index, (cmd) ? true : false);
if (cmd) {
ufshcd_add_command_trace(hba, index, "complete");
result = ufshcd_transfer_rsp_status(hba, lrbp);
@@ -4890,6 +4891,7 @@ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba,
/* Mark completed command as NULL in LRB */
lrbp->cmd = NULL;
lrbp->compl_time_stamp = ktime_get();
+
/* Do not touch lrbp after scsi done */
cmd->scsi_done(cmd);
__ufshcd_release(hba);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index c774012..6cf46bd 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -307,6 +307,7 @@ struct ufs_hba_variant_ops {
void (*config_scaling_param)(struct ufs_hba *hba,
struct devfreq_dev_profile *profile,
void *data);
+ void (*compl_xfer_req)(struct ufs_hba *hba, int tag, bool is_scsi);
};
/* clock gating state */
@@ -1137,6 +1138,13 @@ static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
hba->vops->config_scaling_param(hba, profile, data);
}
+static inline void ufshcd_vops_compl_xfer_req(struct ufs_hba *hba,
+ int tag, bool is_scsi);
+{
+ if (hba->vops && hba->vops->compl_xfer_req)
+ hba->vops->compl_xfer_req(hba, tag, is_scsi);
+}
+
extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
/*
--
2.7.4
