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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: Anjana Hari <quic_ahari@quicinc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Anjana Hari 2023-02-02 21:40:45 +05:30 committed by Martin K. Petersen
parent ad0e4e2fab
commit 88441a8d35
3 changed files with 62 additions and 1 deletions
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51
drivers/ufs/core/ufshcd.c
View File

@ -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)

8
drivers/ufs/host/ufs-qcom.c
View File

@ -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 = {

4
include/ufs/ufshcd.h
View File

@ -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);