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scsi: ufs: core: Add support for reinitializing the UFS device

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Some platforms like Qcom, requires the UFS device to be reinitialized after
switching to maximum gear speed. So add support for that in UFS core by
introducing a new quirk (UFSHCD_CAP_REINIT_AFTER_MAX_GEAR_SWITCH) and doing
the reinitialization, if the quirk is enabled by the controller driver.

Suggested-by: Can Guo <quic_cang@quicinc.com>
Tested-by: Andrew Halaney <ahalaney@redhat.com> # Qdrive3/sa8540p-ride
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Manivannan Sadhasivam 2022-12-22 19:39:57 +05:30 committed by Martin K. Petersen
parent c2c38c573a
commit 96a7141da3
2 changed files with 53 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/ufs/core/ufshcd.c
View File

@ -8231,27 +8231,18 @@ out:
return ret;
}
/**
* ufshcd_probe_hba - probe hba to detect device and initialize it
* @hba: per-adapter instance
* @init_dev_params: whether or not to call ufshcd_device_params_init().
*
* Execute link-startup and verify device initialization
*/
static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
static int ufshcd_device_init(struct ufs_hba *hba, bool init_dev_params)
{
int ret;
unsigned long flags;
ktime_t start = ktime_get();
hba->ufshcd_state = UFSHCD_STATE_RESET;
ret = ufshcd_link_startup(hba);
if (ret)
goto out;
return ret;
if (hba->quirks & UFSHCD_QUIRK_SKIP_PH_CONFIGURATION)
goto out;
return ret;
/* Debug counters initialization */
ufshcd_clear_dbg_ufs_stats(hba);
@ -8262,12 +8253,12 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
/* Verify device initialization by sending NOP OUT UPIU */
ret = ufshcd_verify_dev_init(hba);
if (ret)
goto out;
return ret;
/* Initiate UFS initialization, and waiting until completion */
ret = ufshcd_complete_dev_init(hba);
if (ret)
goto out;
return ret;
/*
* Initialize UFS device parameters used by driver, these
@ -8276,7 +8267,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
if (init_dev_params) {
ret = ufshcd_device_params_init(hba);
if (ret)
goto out;
return ret;
}
ufshcd_tune_unipro_params(hba);
@ -8297,11 +8288,51 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
if (ret) {
dev_err(hba->dev, "%s: Failed setting power mode, err = %d\n",
__func__, ret);
return ret;
}
}
return 0;
}
/**
* ufshcd_probe_hba - probe hba to detect device and initialize it
* @hba: per-adapter instance
* @init_dev_params: whether or not to call ufshcd_device_params_init().
*
* Execute link-startup and verify device initialization
*/
static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
{
ktime_t start = ktime_get();
unsigned long flags;
int ret;
ret = ufshcd_device_init(hba, init_dev_params);
if (ret)
goto out;
if (hba->quirks & UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH) {
/* Reset the device and controller before doing reinit */
ufshcd_device_reset(hba);
ufshcd_hba_stop(hba);
ufshcd_vops_reinit_notify(hba);
ret = ufshcd_hba_enable(hba);
if (ret) {
dev_err(hba->dev, "Host controller enable failed\n");
ufshcd_print_evt_hist(hba);
ufshcd_print_host_state(hba);
goto out;
}
ufshcd_print_pwr_info(hba);
/* Reinit the device */
ret = ufshcd_device_init(hba, init_dev_params);
if (ret)
goto out;
}
ufshcd_print_pwr_info(hba);
/*
* bActiveICCLevel is volatile for UFS device (as per latest v2.1 spec)
* and for removable UFS card as well, hence always set the parameter.

6
include/ufs/ufshcd.h
View File

@ -596,6 +596,12 @@ enum ufshcd_quirks {
* auto-hibernate capability but it's FASTAUTO only.
*/
UFSHCD_QUIRK_HIBERN_FASTAUTO = 1 << 18,
/*
* This quirk needs to be enabled if the host controller needs
* to reinit the device after switching to maximum gear.
*/
UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH = 1 << 19,
};
enum ufshcd_caps {