> On Apr 19, 2021, at 6:01 AM, Kashyap Desai <kashyap.desai@xxxxxxxxxxxx> wrote:
>
> Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx>
> Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
> Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx>
>
> Cc: sathya.prakash@xxxxxxxxxxxx
> ---
> drivers/scsi/mpi3mr/mpi3mr_os.c | 85 +++++++++++++++++++++++++++++++++
> 1 file changed, 85 insertions(+)
>
> diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
> index ccee3e7359ec..05473b0f3c9e 100644
> --- a/drivers/scsi/mpi3mr/mpi3mr_os.c
> +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
> @@ -3409,6 +3409,87 @@ static void mpi3mr_shutdown(struct pci_dev *pdev)
>
> }
>
> +#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,
> @@ -3424,6 +3505,10 @@ 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)
> --
> 2.18.1
>
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
--
Himanshu Madhani Oracle Linux Engineering
