Add support to check for MCQ capability in the UFSHC.
Add a module parameter to disable MCQ if needed.
Co-developed-by: Can Guo <quic_cang@xxxxxxxxxxx>
Signed-off-by: Can Guo <quic_cang@xxxxxxxxxxx>
Signed-off-by: Asutosh Das <quic_asutoshd@xxxxxxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Reviewed-by: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
---
drivers/ufs/core/ufshcd.c | 26 ++++++++++++++++++++++++++
include/ufs/ufshcd.h | 2 ++
2 files changed, 28 insertions(+)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 025386c..bc30268 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -92,6 +92,28 @@
/* Polling time to wait for fDeviceInit */
#define FDEVICEINIT_COMPL_TIMEOUT 1500 /* millisecs */
+/* UFSHC 4.0 compliant HC support this mode, refer param_set_mcq_mode() */
+static bool use_mcq_mode = true;
+
+static int param_set_mcq_mode(const char *val, const struct kernel_param *kp)
+{
+ int ret;
+
+ ret = param_set_bool(val, kp);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct kernel_param_ops mcq_mode_ops = {
+ .set = param_set_mcq_mode,
+ .get = param_get_bool,
+};
+
+module_param_cb(use_mcq_mode, &mcq_mode_ops, &use_mcq_mode, 0644);
+MODULE_PARM_DESC(use_mcq_mode, "Control MCQ mode for controllers starting from UFSHCI 4.0. 1 - enable MCQ, 0 - disable MCQ. MCQ is enabled by default");
+
#define ufshcd_toggle_vreg(_dev, _vreg, _on) \
({ \
int _ret; \
@@ -2261,6 +2283,10 @@ static inline int ufshcd_hba_capabilities(struct ufs_hba *hba)
if (err)
dev_err(hba->dev, "crypto setup failed\n");
+ hba->mcq_sup = FIELD_GET(MASK_MCQ_SUPPORT, hba->capabilities);
+ if (!hba->mcq_sup)
+ return err;
+
hba->mcq_capabilities = ufshcd_readl(hba, REG_MCQCAP);
hba->ext_iid_sup = FIELD_GET(MASK_EXT_IID_SUPPORT,
hba->mcq_capabilities);
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 13d339c..be49d38 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -834,6 +834,7 @@ struct ufs_hba_monitor {
* @complete_put: whether or not to call ufshcd_rpm_put() from inside
* ufshcd_resume_complete()
* @ext_iid_sup: is EXT_IID is supported by UFSHC
+ * @mcq_sup: is mcq supported by UFSHC
*/
struct ufs_hba {
void __iomem *mmio_base;
@@ -986,6 +987,7 @@ struct ufs_hba {
u32 luns_avail;
bool complete_put;
bool ext_iid_sup;
+ bool mcq_sup;
};
#ifdef CONFIG_SCSI_UFS_VARIABLE_SG_ENTRY_SIZE
--
2.7.4
