Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a7883066 authored by Subhash Jadavani's avatar Subhash Jadavani Committed by Sujit Reddy Thumma
Browse files

scsi: ufs: add shutdown support 



This patch adds the UFS device/link shutdown support when system goes to
shutdown. During shutdown, UFS device & link would be put in power off
state.

Change-Id: I4ec31d62b69182495ff6d6b07505651937d37385
Signed-off-by: default avatarSubhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: default avatarSujit Reddy Thumma <sthumma@codeaurora.org>
parent 4fb76bba

drivers/scsi/ufs/ufshcd-pci.c

+1 −1
Original line number Diff line number Diff line
@@ -92,7 +92,7 @@ static int ufshcd_pci_runtime_idle(struct device *dev) 
 */

static void ufshcd_pci_shutdown(struct pci_dev *pdev)

{

	ufshcd_hba_stop((struct ufs_hba *)pci_get_drvdata(pdev), true);

	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));

}



/**

drivers/scsi/ufs/ufshcd-pltfrm.c

+6 −0
Original line number Diff line number Diff line
@@ -258,6 +258,11 @@ static int ufshcd_pltfrm_runtime_idle(struct device *dev) 
#define ufshcd_pltfrm_runtime_idle	NULL

#endif /* CONFIG_PM_RUNTIME */



static void ufshcd_pltfrm_shutdown(struct platform_device *pdev)

{

	ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));

}



/**

 * ufshcd_pltfrm_probe - probe routine of the driver

 * @pdev: pointer to Platform device handle
@@ -362,6 +367,7 @@ static const struct dev_pm_ops ufshcd_dev_pm_ops = { 
static struct platform_driver ufshcd_pltfrm_driver = {

	.probe	= ufshcd_pltfrm_probe,

	.remove	= ufshcd_pltfrm_remove,

	.shutdown = ufshcd_pltfrm_shutdown,

	.driver	= {

		.name	= "ufshcd",

		.owner	= THIS_MODULE,

drivers/scsi/ufs/ufshcd.c

+44 −8
Original line number Diff line number Diff line
@@ -4826,15 +4826,15 @@ out: 
/**

 * ufshcd_suspend - helper function for suspend operations

 * @hba: per adapter instance

 * @pm_op: runtime PM or system PM

 *

 * This is common function called by both ufshcd_system_suspend() and

 * ufshcd_runtime_suspend().

 * @pm_op: desired low power operation type

 *

 * This function will try to put the UFS device and link into low power

 * mode based on the "rpm_lvl" (Runtime PM level) or "spm_lvl"

 * (System PM level).

 *

 * If this function is called during shutdown, it will make sure that

 * both UFS device and UFS link is powered off.

 *

 * NOTE: UFS device & link must be active before we enter in this function.

 *

 * Returns 0 for success and non-zero for failure
@@ -4847,9 +4847,15 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) 
	enum uic_link_state req_link_state;



	hba->pm_op_in_progress = 1;

	pm_lvl = ufshcd_is_runtime_pm(pm_op) ? hba->rpm_lvl : hba->spm_lvl;

	if (!ufshcd_is_shutdown_pm(pm_op)) {

		pm_lvl = ufshcd_is_runtime_pm(pm_op) ?

			 hba->rpm_lvl : hba->spm_lvl;

		req_dev_pwr_mode = ufs_get_pm_lvl_to_dev_pwr_mode(pm_lvl);

		req_link_state = ufs_get_pm_lvl_to_link_pwr_state(pm_lvl);

	} else {

		req_dev_pwr_mode = UFS_POWERDOWN_PWR_MODE;

		req_link_state = UIC_LINK_OFF_STATE;

	}



	/*

	 * If we can't transition into any of the low power modes
@@ -4882,7 +4888,7 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) 


	if ((req_dev_pwr_mode != hba->curr_dev_pwr_mode) &&

	     ((ufshcd_is_runtime_pm(pm_op) && !hba->auto_bkops_enabled) ||

	       ufshcd_is_system_pm(pm_op))) {

	       !ufshcd_is_runtime_pm(pm_op))) {

		/* ensure that bkops is disabled */

		ufshcd_disable_auto_bkops(hba);

		ret = ufshcd_set_dev_pwr_mode(hba, req_dev_pwr_mode);
@@ -5175,6 +5181,36 @@ int ufshcd_runtime_idle(struct ufs_hba *hba) 
}

EXPORT_SYMBOL(ufshcd_runtime_idle);



/**

 * ufshcd_shutdown - shutdown routine

 * @hba: per adapter instance

 *

 * This function would power off both UFS device and UFS link.

 *

 * Returns 0 always to allow force shutdown even in case of errors.

 */

int ufshcd_shutdown(struct ufs_hba *hba)

{

	int ret = 0;



	if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba))

		goto out;



	if (pm_runtime_suspended(hba->dev)) {

		ret = ufshcd_runtime_resume(hba);

		if (ret)

			goto out;

	}



	ret = ufshcd_suspend(hba, UFS_SHUTDOWN_PM);

out:

	if (ret)

		dev_err(hba->dev, "%s failed, err %d\n", __func__, ret);

	/* allow force shutdown even in case of errors */

	return 0;

}

EXPORT_SYMBOL(ufshcd_shutdown);



/**

 * ufshcd_remove - de-allocate SCSI host and host memory space

 *		data structure memory

drivers/scsi/ufs/ufshcd.h

+3 −0
Original line number Diff line number Diff line
@@ -102,10 +102,12 @@ struct uic_command { 
enum ufs_pm_op {

	UFS_RUNTIME_PM,

	UFS_SYSTEM_PM,

	UFS_SHUTDOWN_PM,

};



#define ufshcd_is_runtime_pm(op) ((op) == UFS_RUNTIME_PM)

#define ufshcd_is_system_pm(op) ((op) == UFS_SYSTEM_PM)

#define ufshcd_is_shutdown_pm(op) ((op) == UFS_SHUTDOWN_PM)



/* Host <-> Device UniPro Link state */

enum uic_link_state {
@@ -504,6 +506,7 @@ extern int ufshcd_runtime_resume(struct ufs_hba *hba); 
extern int ufshcd_runtime_idle(struct ufs_hba *hba);

extern int ufshcd_system_suspend(struct ufs_hba *hba);

extern int ufshcd_system_resume(struct ufs_hba *hba);

extern int ufshcd_shutdown(struct ufs_hba *hba);

extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,

			       u8 attr_set, u32 mib_val, u8 peer);

extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,