From: Vaibhav Gupta <vaibhavgupta40@gmail.com>
To: Bjorn Helgaas <helgaas@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Bjorn Helgaas <bjorn@helgaas.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>,
Vaibhav Gupta <vaibhav.varodek@gmail.com>
Cc: linux-scsi@vger.kernel.org,
Vaibhav Gupta <vaibhavgupta40@gmail.com>,
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: [Linux-kernel-mentees] [PATCH v1 01/15] scsi: megaraid_sas: use generic power management
Date: Fri, 17 Jul 2020 12:04:24 +0530 [thread overview]
Message-ID: <20200717063438.175022-2-vaibhavgupta40@gmail.com> (raw)
In-Reply-To: <20200717063438.175022-1-vaibhavgupta40@gmail.com>
With legacy PM hooks, it was the responsibility of a driver to manage PCI
states and also the device's power state. The generic approach is to let
the PCI core handle the work.
PCI core passes "struct device*" as an argument to the .suspend() and
.resume() callbacks. As the .suspend() work with "struct instance*",
extract it from "struct device*" using dev_get_drv_data().
Driver was also using PCI helper functions like pci_save/restore_state(),
pci_disable/enable_device(), pci_set_power_state() and pci_enable_wake().
They should not be invoked by the driver.
Compile-tested only.
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 57 +++++++----------------
1 file changed, 16 insertions(+), 41 deletions(-)
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 00668335c2af..c1bf429d29db 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -7539,25 +7539,23 @@ static void megasas_shutdown_controller(struct megasas_instance *instance,
megasas_return_cmd(instance, cmd);
}
-#ifdef CONFIG_PM
/**
* megasas_suspend - driver suspend entry point
- * @pdev: PCI device structure
- * @state: PCI power state to suspend routine
+ * @dev: Device structure
*/
-static int
-megasas_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused
+megasas_suspend(struct device *dev)
{
struct megasas_instance *instance;
- instance = pci_get_drvdata(pdev);
+ instance = dev_get_drvdata(dev);
if (!instance)
return 0;
instance->unload = 1;
- dev_info(&pdev->dev, "%s is called\n", __func__);
+ dev_info(dev, "%s is called\n", __func__);
/* Shutdown SR-IOV heartbeat timer */
if (instance->requestorId && !instance->skip_heartbeat_timer_del)
@@ -7579,7 +7577,7 @@ megasas_suspend(struct pci_dev *pdev, pm_message_t state)
tasklet_kill(&instance->isr_tasklet);
- pci_set_drvdata(instance->pdev, instance);
+ dev_set_drvdata(dev, instance);
instance->instancet->disable_intr(instance);
megasas_destroy_irqs(instance);
@@ -7587,48 +7585,30 @@ megasas_suspend(struct pci_dev *pdev, pm_message_t state)
if (instance->msix_vectors)
pci_free_irq_vectors(instance->pdev);
- pci_save_state(pdev);
- pci_disable_device(pdev);
-
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
-
return 0;
}
/**
* megasas_resume- driver resume entry point
- * @pdev: PCI device structure
+ * @dev: Device structure
*/
-static int
-megasas_resume(struct pci_dev *pdev)
+static int __maybe_unused
+megasas_resume(struct device *dev)
{
int rval;
struct Scsi_Host *host;
struct megasas_instance *instance;
u32 status_reg;
- instance = pci_get_drvdata(pdev);
+ instance = dev_get_drvdata(dev);
if (!instance)
return 0;
host = instance->host;
- pci_set_power_state(pdev, PCI_D0);
- pci_enable_wake(pdev, PCI_D0, 0);
- pci_restore_state(pdev);
+ device_wakeup_disable(dev);
- dev_info(&pdev->dev, "%s is called\n", __func__);
- /*
- * PCI prepping: enable device set bus mastering and dma mask
- */
- rval = pci_enable_device_mem(pdev);
-
- if (rval) {
- dev_err(&pdev->dev, "Enable device failed\n");
- return rval;
- }
-
- pci_set_master(pdev);
+ dev_info(dev, "%s is called\n", __func__);
/*
* We expect the FW state to be READY
@@ -7754,14 +7734,8 @@ megasas_resume(struct pci_dev *pdev)
fail_set_dma_mask:
fail_ready_state:
- pci_disable_device(pdev);
-
return -ENODEV;
}
-#else
-#define megasas_suspend NULL
-#define megasas_resume NULL
-#endif
static inline int
megasas_wait_for_adapter_operational(struct megasas_instance *instance)
@@ -7931,7 +7905,7 @@ static void megasas_detach_one(struct pci_dev *pdev)
/**
* megasas_shutdown - Shutdown entry point
- * @device: Generic device structure
+ * @pdev: PCI device structure
*/
static void megasas_shutdown(struct pci_dev *pdev)
{
@@ -8508,6 +8482,8 @@ static const struct file_operations megasas_mgmt_fops = {
.llseek = noop_llseek,
};
+static SIMPLE_DEV_PM_OPS(megasas_pm_ops, megasas_suspend, megasas_resume);
+
/*
* PCI hotplug support registration structure
*/
@@ -8517,8 +8493,7 @@ static struct pci_driver megasas_pci_driver = {
.id_table = megasas_pci_table,
.probe = megasas_probe_one,
.remove = megasas_detach_one,
- .suspend = megasas_suspend,
- .resume = megasas_resume,
+ .driver.pm = &megasas_pm_ops,
.shutdown = megasas_shutdown,
};
--
2.27.0
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next prev parent reply other threads:[~2020-07-17 6:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-17 6:34 [Linux-kernel-mentees] [PATCH v1 00/15] scsi: use generic power management Vaibhav Gupta
2020-07-17 6:34 ` Vaibhav Gupta [this message]
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 02/15] scsi: aacraid: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 03/15] scsi: aic7xxx: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 04/15] scsi: aic79xx: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 05/15] scsi: arcmsr: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 06/15] scsi: esas2r: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 07/15] scsi: hisi_sas_v3_hw: " Vaibhav Gupta
2020-07-20 6:16 ` chenxiang (M)
2020-07-20 6:32 ` Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 08/15] scsi: mpt3sas_scsih: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 09/15] scsi: lpfc: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 10/15] scsi: pm_8001: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 11/15] scsi: hpsa: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 12/15] scsi: 3w-9xxx: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 13/15] scsi: 3w-sas: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 14/15] scsi: mvumi: " Vaibhav Gupta
2020-07-17 6:34 ` [Linux-kernel-mentees] [PATCH v1 15/15] scsi: pmcraid: " Vaibhav Gupta
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