@@ -170,7 +170,7 @@ static int ufs_bsg_request(struct bsg_job *job)
break;
case UPIU_TRANSACTION_UIC_CMD:
memcpy(&uc, &bsg_request->upiu_req.uc, UIC_CMD_SIZE);
- ret = ufshcd_send_uic_cmd(hba, &uc);
+ ret = ufshcd_send_bsg_uic_cmd(hba, &uc);
if (ret)
dev_err(hba->dev, "send uic cmd: error code %d\n", ret);
@@ -84,6 +84,7 @@ int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
u8 **buf, bool ascii);
int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
+int ufshcd_send_bsg_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
struct utp_upiu_req *req_upiu,
@@ -4319,6 +4319,42 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd)
return ret;
}
+/**
+ * ufshcd_send_bsg_uic_cmd - Send UIC commands requested via BSG layer and retrieve the result
+ * @hba: per adapter instance
+ * @uic_cmd: UIC command
+ *
+ * Return: 0 only if success.
+ */
+int ufshcd_send_bsg_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
+{
+ int ret;
+
+ if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD)
+ return 0;
+
+ ufshcd_hold(hba);
+
+ if (uic_cmd->argument1 == UIC_ARG_MIB(PA_PWRMODE) &&
+ uic_cmd->command == UIC_CMD_DME_SET) {
+ ret = ufshcd_uic_pwr_ctrl(hba, uic_cmd);
+ goto out;
+ }
+
+ mutex_lock(&hba->uic_cmd_mutex);
+ ufshcd_add_delay_before_dme_cmd(hba);
+
+ ret = __ufshcd_send_uic_cmd(hba, uic_cmd);
+ if (!ret)
+ ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd);
+
+ mutex_unlock(&hba->uic_cmd_mutex);
+
+out:
+ ufshcd_release(hba);
+ return ret;
+}
+
/**
* ufshcd_uic_change_pwr_mode - Perform the UIC power mode chage
* using DME_SET primitives.
User layer applications can send UIC GET/SET commands via the BSG framework, and if the user layer application sends a UIC SET command to the PA_PWRMODE attribute, a power mode change shall be initiated in UniPro and two interrupts shall be triggered if the power mode is successfully changed, i.e., UIC Command Completion interrupt and UIC Power Mode interrupt. The current UFS BSG code calls ufshcd_send_uic_cmd() directly, with which the second interrupt, i.e., UIC Power Mode interrupt, shall be treated as unhandled interrupt. In addition, after the UIC command is completed, user layer application has to poll UniPro and/or M-PHY state machine to confirm the power mode change is finished. Add a new wrapper function ufshcd_send_bsg_uic_cmd() and call it from ufs_bsg_request() so that if a UIC SET command is targeting the PA_PWRMODE attribute it can be redirected to ufshcd_uic_pwr_ctrl(). Fixes: e77044c5a842 ("scsi: ufs-bsg: Add support for uic commands in ufs_bsg_request()") Signed-off-by: Can Guo <quic_cang@quicinc.com> Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> --- V2 -> V3: Added Fixes tag V1 -> V2: Rebased on Linux 6.13 --- drivers/ufs/core/ufs_bsg.c | 2 +- drivers/ufs/core/ufshcd-priv.h | 1 + drivers/ufs/core/ufshcd.c | 36 ++++++++++++++++++++++++++++++++++ 3 files changed, 38 insertions(+), 1 deletion(-)