summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAsutosh Das <quic_asutoshd@quicinc.com>2023-01-13 23:48:39 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2023-01-14 05:03:36 +0300
commit305a357d3595d39be7c001f72e135bc94cbd85da (patch)
treeaa633545797b9a5ff1f3a66f0cbd9521e326d08c
parent6e1d850acff9477ae4c18a73c19ef52841ac2010 (diff)
downloadlinux-305a357d3595d39be7c001f72e135bc94cbd85da.tar.xz
scsi: ufs: core: Introduce multi-circular queue capability
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@quicinc.com> Signed-off-by: Can Guo <quic_cang@quicinc.com> Signed-off-by: Asutosh Das <quic_asutoshd@quicinc.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/ufs/core/ufshcd.c26
-rw-r--r--include/ufs/ufshcd.h2
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 6ba05976c139..64e04619326f 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 8f2080f9fdb5..514687d2de54 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -843,6 +843,7 @@ 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;
@@ -995,6 +996,7 @@ struct ufs_hba {
u32 luns_avail;
bool complete_put;
bool ext_iid_sup;
+ bool mcq_sup;
};
#ifdef CONFIG_SCSI_UFS_VARIABLE_SG_ENTRY_SIZE