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scsi: lpfc: Use generic power management

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Drivers should do only device-specific jobs. But in general, drivers using
legacy PCI PM framework for .suspend()/.resume() have to manage many PCI
PM-related tasks themselves which can be done by PCI Core itself. This
brings extra load on the driver and it directly calls PCI helper functions
to handle them.

Switch to the new generic framework by updating function signatures and
define a "struct dev_pm_ops" variable to bind PM callbacks. Also, remove
unnecessary calls to the PCI Helper functions along with the legacy
.suspend & .resume bindings.

Link: https://lore.kernel.org/r/20201102164730.324035-18-vaibhavgupta40@gmail.com
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Vaibhav Gupta 2020-11-02 22:17:18 +05:30 committed by Martin K. Petersen
parent 17287305a5
commit ef6fa16b5d
1 changed files with 33 additions and 67 deletions
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100
drivers/scsi/lpfc/lpfc_init.c
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@ -12576,8 +12576,7 @@ lpfc_pci_remove_one_s3(struct pci_dev *pdev)
/**
* lpfc_pci_suspend_one_s3 - PCI func to suspend SLI-3 device for power mgmnt
* @pdev: pointer to PCI device
* @msg: power management message
* @dev_d: pointer to device
*
* This routine is to be called from the kernel's PCI subsystem to support
* system Power Management (PM) to device with SLI-3 interface spec. When
@ -12595,10 +12594,10 @@ lpfc_pci_remove_one_s3(struct pci_dev *pdev)
* 0 - driver suspended the device
* Error otherwise
**/
static int
lpfc_pci_suspend_one_s3(struct pci_dev *pdev, pm_message_t msg)
static int __maybe_unused
lpfc_pci_suspend_one_s3(struct device *dev_d)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct Scsi_Host *shost = dev_get_drvdata(dev_d);
struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
@ -12612,16 +12611,12 @@ lpfc_pci_suspend_one_s3(struct pci_dev *pdev, pm_message_t msg)
/* Disable interrupt from device */
lpfc_sli_disable_intr(phba);
/* Save device state to PCI config space */
pci_save_state(pdev);
pci_set_power_state(pdev, PCI_D3hot);
return 0;
}
/**
* lpfc_pci_resume_one_s3 - PCI func to resume SLI-3 device for power mgmnt
* @pdev: pointer to PCI device
* @dev_d: pointer to device
*
* This routine is to be called from the kernel's PCI subsystem to support
* system Power Management (PM) to device with SLI-3 interface spec. When PM
@ -12638,10 +12633,10 @@ lpfc_pci_suspend_one_s3(struct pci_dev *pdev, pm_message_t msg)
* 0 - driver suspended the device
* Error otherwise
**/
static int
lpfc_pci_resume_one_s3(struct pci_dev *pdev)
static int __maybe_unused
lpfc_pci_resume_one_s3(struct device *dev_d)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct Scsi_Host *shost = dev_get_drvdata(dev_d);
struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
uint32_t intr_mode;
int error;
@ -12649,19 +12644,6 @@ lpfc_pci_resume_one_s3(struct pci_dev *pdev)
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
"0452 PCI device Power Management resume.\n");
/* Restore device state from PCI config space */
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
/*
* As the new kernel behavior of pci_restore_state() API call clears
* device saved_state flag, need to save the restored state again.
*/
pci_save_state(pdev);
if (pdev->is_busmaster)
pci_set_master(pdev);
/* Startup the kernel thread for this host adapter. */
phba->worker_thread = kthread_run(lpfc_do_work, phba,
"lpfc_worker_%d", phba->brd_no);
@ -13417,8 +13399,7 @@ lpfc_pci_remove_one_s4(struct pci_dev *pdev)
/**
* lpfc_pci_suspend_one_s4 - PCI func to suspend SLI-4 device for power mgmnt
* @pdev: pointer to PCI device
* @msg: power management message
* @dev_d: pointer to device
*
* This routine is called from the kernel's PCI subsystem to support system
* Power Management (PM) to device with SLI-4 interface spec. When PM invokes
@ -13436,10 +13417,10 @@ lpfc_pci_remove_one_s4(struct pci_dev *pdev)
* 0 - driver suspended the device
* Error otherwise
**/
static int
lpfc_pci_suspend_one_s4(struct pci_dev *pdev, pm_message_t msg)
static int __maybe_unused
lpfc_pci_suspend_one_s4(struct device *dev_d)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct Scsi_Host *shost = dev_get_drvdata(dev_d);
struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
@ -13454,16 +13435,12 @@ lpfc_pci_suspend_one_s4(struct pci_dev *pdev, pm_message_t msg)
lpfc_sli4_disable_intr(phba);
lpfc_sli4_queue_destroy(phba);
/* Save device state to PCI config space */
pci_save_state(pdev);
pci_set_power_state(pdev, PCI_D3hot);
return 0;
}
/**
* lpfc_pci_resume_one_s4 - PCI func to resume SLI-4 device for power mgmnt
* @pdev: pointer to PCI device
* @dev_d: pointer to device
*
* This routine is called from the kernel's PCI subsystem to support system
* Power Management (PM) to device with SLI-4 interface spac. When PM invokes
@ -13480,10 +13457,10 @@ lpfc_pci_suspend_one_s4(struct pci_dev *pdev, pm_message_t msg)
* 0 - driver suspended the device
* Error otherwise
**/
static int
lpfc_pci_resume_one_s4(struct pci_dev *pdev)
static int __maybe_unused
lpfc_pci_resume_one_s4(struct device *dev_d)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct Scsi_Host *shost = dev_get_drvdata(dev_d);
struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
uint32_t intr_mode;
int error;
@ -13491,19 +13468,6 @@ lpfc_pci_resume_one_s4(struct pci_dev *pdev)
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
"0292 PCI device Power Management resume.\n");
/* Restore device state from PCI config space */
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
/*
* As the new kernel behavior of pci_restore_state() API call clears
* device saved_state flag, need to save the restored state again.
*/
pci_save_state(pdev);
if (pdev->is_busmaster)
pci_set_master(pdev);
/* Startup the kernel thread for this host adapter. */
phba->worker_thread = kthread_run(lpfc_do_work, phba,
"lpfc_worker_%d", phba->brd_no);
@ -13819,8 +13783,7 @@ lpfc_pci_remove_one(struct pci_dev *pdev)
/**
* lpfc_pci_suspend_one - lpfc PCI func to suspend dev for power management
* @pdev: pointer to PCI device
* @msg: power management message
* @dev: pointer to device
*
* This routine is to be registered to the kernel's PCI subsystem to support
* system Power Management (PM). When PM invokes this method, it dispatches
@ -13831,19 +13794,19 @@ lpfc_pci_remove_one(struct pci_dev *pdev)
* 0 - driver suspended the device
* Error otherwise
**/
static int
lpfc_pci_suspend_one(struct pci_dev *pdev, pm_message_t msg)
static int __maybe_unused
lpfc_pci_suspend_one(struct device *dev)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct Scsi_Host *shost = dev_get_drvdata(dev);
struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
int rc = -ENODEV;
switch (phba->pci_dev_grp) {
case LPFC_PCI_DEV_LP:
rc = lpfc_pci_suspend_one_s3(pdev, msg);
rc = lpfc_pci_suspend_one_s3(dev);
break;
case LPFC_PCI_DEV_OC:
rc = lpfc_pci_suspend_one_s4(pdev, msg);
rc = lpfc_pci_suspend_one_s4(dev);
break;
default:
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
@ -13856,7 +13819,7 @@ lpfc_pci_suspend_one(struct pci_dev *pdev, pm_message_t msg)
/**
* lpfc_pci_resume_one - lpfc PCI func to resume dev for power management
* @pdev: pointer to PCI device
* @dev: pointer to device
*
* This routine is to be registered to the kernel's PCI subsystem to support
* system Power Management (PM). When PM invokes this method, it dispatches
@ -13867,19 +13830,19 @@ lpfc_pci_suspend_one(struct pci_dev *pdev, pm_message_t msg)
* 0 - driver suspended the device
* Error otherwise
**/
static int
lpfc_pci_resume_one(struct pci_dev *pdev)
static int __maybe_unused
lpfc_pci_resume_one(struct device *dev)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct Scsi_Host *shost = dev_get_drvdata(dev);
struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
int rc = -ENODEV;
switch (phba->pci_dev_grp) {
case LPFC_PCI_DEV_LP:
rc = lpfc_pci_resume_one_s3(pdev);
rc = lpfc_pci_resume_one_s3(dev);
break;
case LPFC_PCI_DEV_OC:
rc = lpfc_pci_resume_one_s4(pdev);
rc = lpfc_pci_resume_one_s4(dev);
break;
default:
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
@ -14059,14 +14022,17 @@ static const struct pci_error_handlers lpfc_err_handler = {
.resume = lpfc_io_resume,
};
static SIMPLE_DEV_PM_OPS(lpfc_pci_pm_ops_one,
lpfc_pci_suspend_one,
lpfc_pci_resume_one);
static struct pci_driver lpfc_driver = {
.name = LPFC_DRIVER_NAME,
.id_table = lpfc_id_table,
.probe = lpfc_pci_probe_one,
.remove = lpfc_pci_remove_one,
.shutdown = lpfc_pci_remove_one,
.suspend = lpfc_pci_suspend_one,
.resume = lpfc_pci_resume_one,
.driver.pm = &lpfc_pci_pm_ops_one,
.err_handler = &lpfc_err_handler,
};