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scsi: ufs: core: Introduce multi-circular queue capability

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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>
This commit is contained in:
Asutosh Das 2023-01-13 12:48:39 -08:00 committed by Martin K. Petersen
parent 6e1d850acf
commit 305a357d35
2 changed files with 28 additions and 0 deletions
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26
drivers/ufs/core/ufshcd.c
View File

@ -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);

2
include/ufs/ufshcd.h
View File

@ -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