Commit 88441a8d authored by Anjana Hari's avatar Anjana Hari Committed by Martin K. Petersen
Browse files

scsi: ufs: core: Add hibernation callbacks 

Add freeze, thaw, and restore callbacks for hibernate and restore
functionality.

Link: https://lore.kernel.org/r/20230202161045.3956-2-quic_ahari@quicinc.com


Signed-off-by: default avatarAnjana Hari <quic_ahari@quicinc.com>
Reviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent ad0e4e2f

drivers/ufs/core/ufshcd.c

+51 −0
Original line number Diff line number Diff line
@@ -9796,6 +9796,7 @@ static int ufshcd_resume(struct ufs_hba *hba) 


	/* enable the host irq as host controller would be active soon */

	ufshcd_enable_irq(hba);



	goto out;



disable_vreg:
@@ -9959,6 +9960,56 @@ void ufshcd_remove(struct ufs_hba *hba) 
}

EXPORT_SYMBOL_GPL(ufshcd_remove);



#ifdef CONFIG_PM_SLEEP

int ufshcd_system_freeze(struct device *dev)

{



	return ufshcd_system_suspend(dev);



}

EXPORT_SYMBOL_GPL(ufshcd_system_freeze);



int ufshcd_system_restore(struct device *dev)

{



	struct ufs_hba *hba = dev_get_drvdata(dev);

	int ret;



	ret = ufshcd_system_resume(dev);

	if (ret)

		return ret;



	/* Configure UTRL and UTMRL base address registers */

	ufshcd_writel(hba, lower_32_bits(hba->utrdl_dma_addr),

			REG_UTP_TRANSFER_REQ_LIST_BASE_L);

	ufshcd_writel(hba, upper_32_bits(hba->utrdl_dma_addr),

			REG_UTP_TRANSFER_REQ_LIST_BASE_H);

	ufshcd_writel(hba, lower_32_bits(hba->utmrdl_dma_addr),

			REG_UTP_TASK_REQ_LIST_BASE_L);

	ufshcd_writel(hba, upper_32_bits(hba->utmrdl_dma_addr),

			REG_UTP_TASK_REQ_LIST_BASE_H);

	/*

	 * Make sure that UTRL and UTMRL base address registers

	 * are updated with the latest queue addresses. Only after

	 * updating these addresses, we can queue the new commands.

	 */

	mb();



	/* Resuming from hibernate, assume that link was OFF */

	ufshcd_set_link_off(hba);



	return 0;



}

EXPORT_SYMBOL_GPL(ufshcd_system_restore);



int ufshcd_system_thaw(struct device *dev)

{

	return ufshcd_system_resume(dev);

}

EXPORT_SYMBOL_GPL(ufshcd_system_thaw);

#endif /* CONFIG_PM_SLEEP  */



/**

 * ufshcd_dealloc_host - deallocate Host Bus Adapter (HBA)

 * @hba: pointer to Host Bus Adapter (HBA)

drivers/ufs/host/ufs-qcom.c

+7 −1
Original line number Diff line number Diff line
@@ -1710,10 +1710,16 @@ MODULE_DEVICE_TABLE(acpi, ufs_qcom_acpi_match); 
#endif



static const struct dev_pm_ops ufs_qcom_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume)

	SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)

	.prepare	 = ufshcd_suspend_prepare,

	.complete	 = ufshcd_resume_complete,

#ifdef CONFIG_PM_SLEEP

	.suspend         = ufshcd_system_suspend,

	.resume          = ufshcd_system_resume,

	.freeze          = ufshcd_system_freeze,

	.restore         = ufshcd_system_restore,

	.thaw            = ufshcd_system_thaw,

#endif

};



static struct platform_driver ufs_qcom_pltform = {

include/ufs/ufshcd.h

+4 −0
Original line number Diff line number Diff line
@@ -1276,8 +1276,12 @@ extern int ufshcd_runtime_resume(struct device *dev); 
#ifdef CONFIG_PM_SLEEP

extern int ufshcd_system_suspend(struct device *dev);

extern int ufshcd_system_resume(struct device *dev);

extern int ufshcd_system_freeze(struct device *dev);

extern int ufshcd_system_thaw(struct device *dev);

extern int ufshcd_system_restore(struct device *dev);

#endif

extern int ufshcd_shutdown(struct ufs_hba *hba);



extern int ufshcd_dme_configure_adapt(struct ufs_hba *hba,

				      int agreed_gear,

				      int adapt_val);