[PATCH v10 2/6] added UFS 2.0 capabilities

Joao Pinto
2016-03-04T17:22:15Z

Adding UFS 2.0 support to the UFS core driver.

Signed-off-by: Joao Pinto <jpinto@synopsys.com>
---
Changes v8->v10:
- Nothing changed (just to keep up with patch set version).
Changes v7->v8:
- Added "jedec, ufs-2.0" to the ufschd-platform compatibility strings
Changes v0->v7:
- Nothing changed (just to keep up with patch set version).

.../devicetree/bindings/ufs/ufshcd-pltfrm.txt | 4 +--
drivers/scsi/ufs/ufshcd.c | 29 +++++++++++++++++++---
drivers/scsi/ufs/ufshci.h | 1 +
3 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
index 03c0e98..8d9a9d2 100644
--- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
+++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
@@ -4,8 +4,8 @@ UFSHC nodes are defined to describe on-chip UFS host controllers.
Each UFS controller instance should have its own node.

Required properties:
-- compatible : must contain "jedec,ufs-1.1", may also list one or more
- of the following:
+- compatible : must contain "jedec,ufs-1.1" or "jedec,ufs-2.0", may
+ also list one or more of the following:
"qcom,msm8994-ufshc"
"qcom,msm8996-ufshc"
"qcom,ufshc"
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 85cd256..2b5f2bf 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1223,6 +1223,7 @@ static int ufshcd_compose_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
ret = -EINVAL;
}
break;
+ case UTP_CMD_TYPE_UFS_STORAGE:
case UTP_CMD_TYPE_DEV_MANAGE:
ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, DMA_NONE);
if (hba->dev_cmd.type == DEV_CMD_TYPE_QUERY)
@@ -1287,6 +1288,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
struct ufshcd_lrb *lrbp;
struct ufs_hba *hba;
unsigned long flags;
+ u32 upiu_flags;
int tag;
int err = 0;

@@ -1343,10 +1345,23 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
lrbp->task_tag = tag;
lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun);
lrbp->intr_cmd = !ufshcd_is_intr_aggr_allowed(hba) ? true : false;
- lrbp->command_type = UTP_CMD_TYPE_SCSI;
+
+ if (hba->ufs_version == UFSHCI_VERSION_20)
+ lrbp->command_type = UTP_CMD_TYPE_UFS_STORAGE;
+ else
+ lrbp->command_type = UTP_CMD_TYPE_SCSI;

/* form UPIU before issuing the command */
- ufshcd_compose_upiu(hba, lrbp);
+ if (hba->ufs_version == UFSHCI_VERSION_20) {
+ if (likely(lrbp->cmd)) {
+ ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags,
+ lrbp->cmd->sc_data_direction);
+ ufshcd_prepare_utp_scsi_cmd_upiu(lrbp, upiu_flags);
+ } else
+ err = -EINVAL;
+ } else
+ ufshcd_compose_upiu(hba, lrbp);
+
err = ufshcd_map_sg(lrbp);
if (err) {
lrbp->cmd = NULL;
@@ -1371,7 +1386,12 @@ static int ufshcd_compose_dev_cmd(struct ufs_hba *hba,
lrbp->sense_buffer = NULL;
lrbp->task_tag = tag;
lrbp->lun = 0; /* device management cmd is not specific to any LUN */
- lrbp->command_type = UTP_CMD_TYPE_DEV_MANAGE;
+
+ if (hba->ufs_version == UFSHCI_VERSION_20)
+ lrbp->command_type = UTP_CMD_TYPE_UFS_STORAGE;
+ else
+ lrbp->command_type = UTP_CMD_TYPE_DEV_MANAGE;
+
lrbp->intr_cmd = true; /* No interrupt aggregation */
hba->dev_cmd.type = cmd_type;

@@ -3187,7 +3207,8 @@ static void ufshcd_transfer_req_compl(struct ufs_hba *hba)
/* Do not touch lrbp after scsi done */
cmd->scsi_done(cmd);
__ufshcd_release(hba);
- } else if (lrbp->command_type == UTP_CMD_TYPE_DEV_MANAGE) {
+ } else if (lrbp->command_type == UTP_CMD_TYPE_DEV_MANAGE ||
+ lrbp->command_type == UTP_CMD_TYPE_UFS_STORAGE) {
if (hba->dev_cmd.complete)
complete(hba->dev_cmd.complete);
}
diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h
index 0ae0967..8dba0e7 100644
--- a/drivers/scsi/ufs/ufshci.h
+++ b/drivers/scsi/ufs/ufshci.h
@@ -273,6 +273,7 @@ enum {
UTP_CMD_TYPE_SCSI = 0x0,
UTP_CMD_TYPE_UFS = 0x1,
UTP_CMD_TYPE_DEV_MANAGE = 0x2,
+ UTP_CMD_TYPE_UFS_STORAGE = 0x11,
};

enum {
--
1.8.1.5