Commit 2f9c4d52 authored by Kashyap Desai's avatar Kashyap Desai Committed by Martin K. Petersen
Browse files

scsi: mpi3mr: Add support for PM suspend and resume 

Link: https://lore.kernel.org/r/20210520152545.2710479-22-kashyap.desai@broadcom.com


Cc: sathya.prakash@broadcom.com
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarKashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 44dc724f

drivers/scsi/mpi3mr/mpi3mr_os.c

+84 −0
Original line number Diff line number Diff line
@@ -3389,6 +3389,86 @@ static void mpi3mr_shutdown(struct pci_dev *pdev) 
	mpi3mr_cleanup_ioc(mrioc, 0);

}



#ifdef CONFIG_PM

/**

 * mpi3mr_suspend - PCI power management suspend callback

 * @pdev: PCI device instance

 * @state: New power state

 *

 * Change the power state to the given value and cleanup the IOC

 * by issuing MUR and shutdown notification

 *

 * Return: 0 always.

 */

static int mpi3mr_suspend(struct pci_dev *pdev, pm_message_t state)

{

	struct Scsi_Host *shost = pci_get_drvdata(pdev);

	struct mpi3mr_ioc *mrioc;

	pci_power_t device_state;



	if (!shost)

		return 0;



	mrioc = shost_priv(shost);

	while (mrioc->reset_in_progress || mrioc->is_driver_loading)

		ssleep(1);

	mrioc->stop_drv_processing = 1;

	mpi3mr_cleanup_fwevt_list(mrioc);

	scsi_block_requests(shost);

	mpi3mr_stop_watchdog(mrioc);

	mpi3mr_cleanup_ioc(mrioc, 1);



	device_state = pci_choose_state(pdev, state);

	ioc_info(mrioc, "pdev=0x%p, slot=%s, entering operating state [D%d]\n",

	    pdev, pci_name(pdev), device_state);

	pci_save_state(pdev);

	pci_set_power_state(pdev, device_state);

	mpi3mr_cleanup_resources(mrioc);



	return 0;

}



/**

 * mpi3mr_resume - PCI power management resume callback

 * @pdev: PCI device instance

 *

 * Restore the power state to D0 and reinitialize the controller

 * and resume I/O operations to the target devices

 *

 * Return: 0 on success, non-zero on failure

 */

static int mpi3mr_resume(struct pci_dev *pdev)

{

	struct Scsi_Host *shost = pci_get_drvdata(pdev);

	struct mpi3mr_ioc *mrioc;

	pci_power_t device_state = pdev->current_state;

	int r;



	mrioc = shost_priv(shost);



	ioc_info(mrioc, "pdev=0x%p, slot=%s, previous operating state [D%d]\n",

	    pdev, pci_name(pdev), device_state);

	pci_set_power_state(pdev, PCI_D0);

	pci_enable_wake(pdev, PCI_D0, 0);

	pci_restore_state(pdev);

	mrioc->pdev = pdev;

	mrioc->cpu_count = num_online_cpus();

	r = mpi3mr_setup_resources(mrioc);

	if (r) {

		ioc_info(mrioc, "%s: Setup resources failed[%d]\n",

		    __func__, r);

		return r;

	}



	mrioc->stop_drv_processing = 0;

	mpi3mr_init_ioc(mrioc, 1);

	scsi_unblock_requests(shost);

	mpi3mr_start_watchdog(mrioc);



	return 0;

}

#endif



static const struct pci_device_id mpi3mr_pci_id_table[] = {

	{

		PCI_DEVICE_SUB(PCI_VENDOR_ID_LSI_LOGIC, 0x00A5,
@@ -3404,6 +3484,10 @@ static struct pci_driver mpi3mr_pci_driver = { 
	.probe = mpi3mr_probe,

	.remove = mpi3mr_remove,

	.shutdown = mpi3mr_shutdown,

#ifdef CONFIG_PM

	.suspend = mpi3mr_suspend,

	.resume = mpi3mr_resume,

#endif

};



static int __init mpi3mr_init(void)