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Tue, 11 May 2021 12:52:13 -0700 (PDT) From: Kashyap Desai To: linux-scsi@vger.kernel.org Cc: jejb@linux.ibm.com, martin.petersen@oracle.com, steve.hagan@broadcom.com, peter.rivera@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, Kashyap Desai , sathya.prakash@broadcom.com Subject: [PATCH v4 21/24] mpi3mr: add support of PM suspend and resume Date: Wed, 12 May 2021 01:24:20 +0530 Message-Id: <20210511195423.2134562-22-kashyap.desai@broadcom.com> X-Mailer: git-send-email 2.18.1 In-Reply-To: <20210511195423.2134562-1-kashyap.desai@broadcom.com> References: <20210511195423.2134562-1-kashyap.desai@broadcom.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Signed-off-by: Kashyap Desai Reviewed-by: Hannes Reinecke Reviewed-by: Tomas Henzl Reviewed-by: Himanshu Madhani Cc: sathya.prakash@broadcom.com --- drivers/scsi/mpi3mr/mpi3mr_os.c | 84 +++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index 022356a1cd01..2f494bc8ea0d 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -3398,6 +3398,86 @@ 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, @@ -3413,6 +3493,10 @@ 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)