From: Vaibhav Gupta <vaibhavgupta40@gmail.com>
To: Bjorn Helgaas <helgaas@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Bjorn Helgaas <bjorn@helgaas.com>,
Vaibhav Gupta <vaibhav.varodek@gmail.com>,
Adam Radford <aradford@gmail.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Adaptec OEM Raid Solutions <aacraid@microsemi.com>,
Hannes Reinecke <hare@suse.com>,
Bradley Grove <linuxdrivers@attotech.com>,
John Garry <john.garry@huawei.com>,
Don Brace <don.brace@microsemi.com>,
James Smart <james.smart@broadcom.com>,
Dick Kennedy <dick.kennedy@broadcom.com>,
Kashyap Desai <kashyap.desai@broadcom.com>,
Sumit Saxena <sumit.saxena@broadcom.com>,
Shivasharan S <shivasharan.srikanteshwara@broadcom.com>,
Sathya Prakash <sathya.prakash@broadcom.com>,
Sreekanth Reddy <sreekanth.reddy@broadcom.com>,
Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>,
Jack Wang <jinpu.wang@cloud.ionos.com>
Cc: linux-scsi@vger.kernel.org, MPT-FusionLinux.pdl@broadcom.com,
esc.storagedev@microsemi.com, linux-kernel@vger.kernel.org,
linux-kernel-mentees@lists.linuxfoundation.org,
megaraidlinux.pdl@broadcom.com
Subject: Re: [Linux-kernel-mentees] [PATCH v2 07/15] scsi: hisi_sas_v3_hw: use generic power management
Date: Tue, 8 Sep 2020 22:32:23 +0530 [thread overview]
Message-ID: <20200908170223.GH9948@gmail.com> (raw)
In-Reply-To: <20200720133427.454400-8-vaibhavgupta40@gmail.com>
On Mon, Jul 20, 2020 at 07:04:20PM +0530, Vaibhav Gupta wrote:
> With legacy PM, drivers themselves were responsible for managing the
> device's power states and takes care of register states.
>
> After upgrading to the generic structure, PCI core will take care of
> required tasks and drivers should do only device-specific operations.
>
> The driver was calling pci_save/restore_state(), pci_choose_state(),
> pci_enable/disable_device() and pci_set_power_state() which is no more
> needed.
>
> Compile-tested only.
>
> Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
> ---
> drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 32 +++++++++-----------------
> 1 file changed, 11 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> index 55e2321a65bc..824bfbe1abbb 100644
> --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> @@ -3374,13 +3374,13 @@ enum {
> hip08,
> };
>
> -static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
> +static int __maybe_unused hisi_sas_v3_suspend(struct device *dev_d)
> {
> + struct pci_dev *pdev = to_pci_dev(dev_d);
> struct sas_ha_struct *sha = pci_get_drvdata(pdev);
> struct hisi_hba *hisi_hba = sha->lldd_ha;
> struct device *dev = hisi_hba->dev;
> struct Scsi_Host *shost = hisi_hba->shost;
> - pci_power_t device_state;
> int rc;
>
> if (!pdev->pm_cap) {
> @@ -3406,12 +3406,7 @@ static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
>
> hisi_sas_init_mem(hisi_hba);
>
> - device_state = pci_choose_state(pdev, state);
> - dev_warn(dev, "entering operating state [D%d]\n",
> - device_state);
> - pci_save_state(pdev);
> - pci_disable_device(pdev);
> - pci_set_power_state(pdev, device_state);
> + dev_warn(dev, "entering suspend state\n");
>
> hisi_sas_release_tasks(hisi_hba);
>
> @@ -3419,8 +3414,9 @@ static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
> return 0;
> }
>
> -static int hisi_sas_v3_resume(struct pci_dev *pdev)
> +static int __maybe_unused hisi_sas_v3_resume(struct device *dev_d)
> {
> + struct pci_dev *pdev = to_pci_dev(dev_d);
> struct sas_ha_struct *sha = pci_get_drvdata(pdev);
> struct hisi_hba *hisi_hba = sha->lldd_ha;
> struct Scsi_Host *shost = hisi_hba->shost;
> @@ -3430,16 +3426,8 @@ static int hisi_sas_v3_resume(struct pci_dev *pdev)
>
> dev_warn(dev, "resuming from operating state [D%d]\n",
> device_state);
> - pci_set_power_state(pdev, PCI_D0);
> - pci_enable_wake(pdev, PCI_D0, 0);
> - pci_restore_state(pdev);
> - rc = pci_enable_device(pdev);
> - if (rc) {
> - dev_err(dev, "enable device failed during resume (%d)\n", rc);
> - return rc;
> - }
> + device_wakeup_disable(dev_d);
>
> - pci_set_master(pdev);
> scsi_unblock_requests(shost);
> clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
>
> @@ -3447,7 +3435,6 @@ static int hisi_sas_v3_resume(struct pci_dev *pdev)
> rc = hw_init_v3_hw(hisi_hba);
> if (rc) {
> scsi_remove_host(shost);
> - pci_disable_device(pdev);
> return rc;
> }
> hisi_hba->hw->phys_init(hisi_hba);
> @@ -3468,13 +3455,16 @@ static const struct pci_error_handlers hisi_sas_err_handler = {
> .reset_done = hisi_sas_reset_done_v3_hw,
> };
>
> +static SIMPLE_DEV_PM_OPS(hisi_sas_v3_pm_ops,
> + hisi_sas_v3_suspend,
> + hisi_sas_v3_resume);
> +
> static struct pci_driver sas_v3_pci_driver = {
> .name = DRV_NAME,
> .id_table = sas_v3_pci_table,
> .probe = hisi_sas_v3_probe,
> .remove = hisi_sas_v3_remove,
> - .suspend = hisi_sas_v3_suspend,
> - .resume = hisi_sas_v3_resume,
> + .driver.pm = &hisi_sas_v3_pm_ops,
> .err_handler = &hisi_sas_err_handler,
> };
>
> --
> 2.27.0
>
.
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next prev parent reply other threads:[~2020-09-08 17:04 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-20 13:34 [Linux-kernel-mentees] [PATCH v2 00/15] scsi: use generic power management Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 01/15] scsi: megaraid_sas: " Vaibhav Gupta
2020-09-08 16:57 ` Vaibhav Gupta
2020-09-08 17:32 ` Bjorn Helgaas
2020-09-09 10:03 ` Vaibhav Gupta
2020-09-09 13:23 ` Bjorn Helgaas
2020-09-09 15:20 ` Vaibhav Gupta
2020-09-09 16:21 ` Bjorn Helgaas
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 02/15] scsi: aacraid: " Vaibhav Gupta
2020-07-23 6:58 ` Balsundar.P--- via Linux-kernel-mentees
2020-09-08 16:58 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 03/15] scsi: aic7xxx: " Vaibhav Gupta
2020-09-08 16:59 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 04/15] scsi: aic79xx: " Vaibhav Gupta
2020-09-08 16:59 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 05/15] scsi: arcmsr: " Vaibhav Gupta
2020-09-08 17:00 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 06/15] scsi: esas2r: " Vaibhav Gupta
2020-09-08 17:01 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 07/15] scsi: hisi_sas_v3_hw: " Vaibhav Gupta
2020-07-21 1:36 ` chenxiang (M)
2020-09-08 17:02 ` Vaibhav Gupta [this message]
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 08/15] scsi: mpt3sas_scsih: " Vaibhav Gupta
2020-09-08 17:03 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 09/15] scsi: lpfc: " Vaibhav Gupta
2020-09-08 17:03 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 10/15] scsi: pm_8001: " Vaibhav Gupta
2020-07-23 7:02 ` Jinpu Wang
2020-09-08 17:04 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 11/15] scsi: hpsa: " Vaibhav Gupta
2020-07-20 22:23 ` Don.Brace--- via Linux-kernel-mentees
2020-09-08 17:05 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 12/15] scsi: 3w-9xxx: " Vaibhav Gupta
2020-09-08 17:05 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 13/15] scsi: 3w-sas: " Vaibhav Gupta
2020-09-08 17:06 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 14/15] scsi: mvumi: " Vaibhav Gupta
2020-09-08 17:07 ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 15/15] scsi: pmcraid: " Vaibhav Gupta
2020-09-08 17:08 ` Vaibhav Gupta
2020-08-17 8:16 ` [Linux-kernel-mentees] [PATCH v2 00/15] scsi: " Vaibhav Gupta
2020-09-08 16:54 ` Vaibhav Gupta
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