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: Vaibhav Gupta <vaibhavgupta40@gmail.com>,
Shuah Khan <skhan@linuxfoundation.org>,
linux-kernel@vger.kernel.org,
linux-kernel-mentees@lists.linuxfoundation.org,
linux-scsi@vger.kernel.org, esc.storagedev@microsemi.com,
megaraidlinux.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com
Subject: [PATCH v2 04/15] scsi: aic79xx: use generic power management
Date: Mon, 20 Jul 2020 19:04:17 +0530 [thread overview]
Message-ID: <20200720133427.454400-5-vaibhavgupta40@gmail.com> (raw)
In-Reply-To: <20200720133427.454400-1-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.
Driver was 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.
Also, .suspend() and .resume() were invoking other functions for PM, which
were againg bounded by "#ifdef CONFIG_PM" directive. Remove them and mark
them as "__maybe_unused".
Compile-tested only.
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
---
drivers/scsi/aic7xxx/aic79xx.h | 12 +++----
drivers/scsi/aic7xxx/aic79xx_core.c | 8 ++---
drivers/scsi/aic7xxx/aic79xx_osm_pci.c | 43 +++++++-------------------
drivers/scsi/aic7xxx/aic79xx_pci.c | 6 ++--
4 files changed, 20 insertions(+), 49 deletions(-)
diff --git a/drivers/scsi/aic7xxx/aic79xx.h b/drivers/scsi/aic7xxx/aic79xx.h
index 9a515551641c..dd5dfd4f30a5 100644
--- a/drivers/scsi/aic7xxx/aic79xx.h
+++ b/drivers/scsi/aic7xxx/aic79xx.h
@@ -1330,10 +1330,8 @@ const struct ahd_pci_identity *ahd_find_pci_device(ahd_dev_softc_t);
int ahd_pci_config(struct ahd_softc *,
const struct ahd_pci_identity *);
int ahd_pci_test_register_access(struct ahd_softc *);
-#ifdef CONFIG_PM
-void ahd_pci_suspend(struct ahd_softc *);
-void ahd_pci_resume(struct ahd_softc *);
-#endif
+void __maybe_unused ahd_pci_suspend(struct ahd_softc *);
+void __maybe_unused ahd_pci_resume(struct ahd_softc *);
/************************** SCB and SCB queue management **********************/
void ahd_qinfifo_requeue_tail(struct ahd_softc *ahd,
@@ -1344,10 +1342,8 @@ struct ahd_softc *ahd_alloc(void *platform_arg, char *name);
int ahd_softc_init(struct ahd_softc *);
void ahd_controller_info(struct ahd_softc *ahd, char *buf);
int ahd_init(struct ahd_softc *ahd);
-#ifdef CONFIG_PM
-int ahd_suspend(struct ahd_softc *ahd);
-void ahd_resume(struct ahd_softc *ahd);
-#endif
+int __maybe_unused ahd_suspend(struct ahd_softc *ahd);
+void __maybe_unused ahd_resume(struct ahd_softc *ahd);
int ahd_default_config(struct ahd_softc *ahd);
int ahd_parse_vpddata(struct ahd_softc *ahd,
struct vpd_config *vpd);
diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c
index e4a09b93d00c..06ee7abd0f8f 100644
--- a/drivers/scsi/aic7xxx/aic79xx_core.c
+++ b/drivers/scsi/aic7xxx/aic79xx_core.c
@@ -7880,11 +7880,9 @@ ahd_pause_and_flushwork(struct ahd_softc *ahd)
ahd->flags &= ~AHD_ALL_INTERRUPTS;
}
-#ifdef CONFIG_PM
-int
+int __maybe_unused
ahd_suspend(struct ahd_softc *ahd)
{
-
ahd_pause_and_flushwork(ahd);
if (LIST_FIRST(&ahd->pending_scbs) != NULL) {
@@ -7895,15 +7893,13 @@ ahd_suspend(struct ahd_softc *ahd)
return (0);
}
-void
+void __maybe_unused
ahd_resume(struct ahd_softc *ahd)
{
-
ahd_reset(ahd, /*reinit*/TRUE);
ahd_intr_enable(ahd, TRUE);
ahd_restart(ahd);
}
-#endif
/************************** Busy Target Table *********************************/
/*
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm_pci.c b/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
index 8b891a05d9e7..07b670b80f1b 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
@@ -74,11 +74,10 @@ static const struct pci_device_id ahd_linux_pci_id_table[] = {
MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
-#ifdef CONFIG_PM
-static int
-ahd_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
+static int __maybe_unused
+ahd_linux_pci_dev_suspend(struct device *dev)
{
- struct ahd_softc *ahd = pci_get_drvdata(pdev);
+ struct ahd_softc *ahd = dev_get_drvdata(dev);
int rc;
if ((rc = ahd_suspend(ahd)))
@@ -86,39 +85,20 @@ ahd_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
ahd_pci_suspend(ahd);
- pci_save_state(pdev);
- pci_disable_device(pdev);
-
- if (mesg.event & PM_EVENT_SLEEP)
- pci_set_power_state(pdev, PCI_D3hot);
-
return rc;
}
-static int
-ahd_linux_pci_dev_resume(struct pci_dev *pdev)
+static int __maybe_unused
+ahd_linux_pci_dev_resume(struct device *dev)
{
- struct ahd_softc *ahd = pci_get_drvdata(pdev);
- int rc;
-
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
-
- if ((rc = pci_enable_device(pdev))) {
- dev_printk(KERN_ERR, &pdev->dev,
- "failed to enable device after resume (%d)\n", rc);
- return rc;
- }
-
- pci_set_master(pdev);
+ struct ahd_softc *ahd = dev_get_drvdata(dev);
ahd_pci_resume(ahd);
ahd_resume(ahd);
- return rc;
+ return 0;
}
-#endif
static void
ahd_linux_pci_dev_remove(struct pci_dev *pdev)
@@ -224,13 +204,14 @@ ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return (0);
}
+static SIMPLE_DEV_PM_OPS(ahd_linux_pci_dev_pm_ops,
+ ahd_linux_pci_dev_suspend,
+ ahd_linux_pci_dev_resume);
+
static struct pci_driver aic79xx_pci_driver = {
.name = "aic79xx",
.probe = ahd_linux_pci_dev_probe,
-#ifdef CONFIG_PM
- .suspend = ahd_linux_pci_dev_suspend,
- .resume = ahd_linux_pci_dev_resume,
-#endif
+ .driver.pm = &ahd_linux_pci_dev_pm_ops,
.remove = ahd_linux_pci_dev_remove,
.id_table = ahd_linux_pci_id_table
};
diff --git a/drivers/scsi/aic7xxx/aic79xx_pci.c b/drivers/scsi/aic7xxx/aic79xx_pci.c
index 8397ae93f7dd..2f0bdb9225a4 100644
--- a/drivers/scsi/aic7xxx/aic79xx_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_pci.c
@@ -377,8 +377,7 @@ ahd_pci_config(struct ahd_softc *ahd, const struct ahd_pci_identity *entry)
return ahd_pci_map_int(ahd);
}
-#ifdef CONFIG_PM
-void
+void __maybe_unused
ahd_pci_suspend(struct ahd_softc *ahd)
{
/*
@@ -394,7 +393,7 @@ ahd_pci_suspend(struct ahd_softc *ahd)
}
-void
+void __maybe_unused
ahd_pci_resume(struct ahd_softc *ahd)
{
ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
@@ -404,7 +403,6 @@ ahd_pci_resume(struct ahd_softc *ahd)
ahd_pci_write_config(ahd->dev_softc, CSIZE_LATTIME,
ahd->suspend_state.pci_state.csize_lattime, /*bytes*/1);
}
-#endif
/*
* Perform some simple tests that should catch situations where
--
2.27.0
next prev parent reply other threads:[~2020-07-20 13:37 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-20 13:34 [PATCH v2 00/15] scsi: use generic power management Vaibhav Gupta
2020-07-20 13:34 ` [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 ` [PATCH v2 02/15] scsi: aacraid: " Vaibhav Gupta
2020-07-23 6:58 ` Balsundar.P
2020-09-08 16:58 ` Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 03/15] scsi: aic7xxx: " Vaibhav Gupta
2020-09-08 16:59 ` Vaibhav Gupta
2020-07-20 13:34 ` Vaibhav Gupta [this message]
2020-09-08 16:59 ` [PATCH v2 04/15] scsi: aic79xx: " Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 05/15] scsi: arcmsr: " Vaibhav Gupta
2020-09-08 17:00 ` Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 06/15] scsi: esas2r: " Vaibhav Gupta
2020-09-08 17:01 ` Vaibhav Gupta
2020-07-20 13:34 ` [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
2020-07-20 13:34 ` [PATCH v2 08/15] scsi: mpt3sas_scsih: " Vaibhav Gupta
2020-09-08 17:03 ` Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 09/15] scsi: lpfc: " Vaibhav Gupta
2020-09-08 17:03 ` Vaibhav Gupta
2020-07-20 13:34 ` [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 ` [PATCH v2 11/15] scsi: hpsa: " Vaibhav Gupta
2020-07-20 22:23 ` Don.Brace
2020-09-08 17:05 ` Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 12/15] scsi: 3w-9xxx: " Vaibhav Gupta
2020-09-08 17:05 ` Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 13/15] scsi: 3w-sas: " Vaibhav Gupta
2020-09-08 17:06 ` Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 14/15] scsi: mvumi: " Vaibhav Gupta
2020-09-08 17:07 ` Vaibhav Gupta
2020-07-20 13:34 ` [PATCH v2 15/15] scsi: pmcraid: " Vaibhav Gupta
2020-09-08 17:08 ` Vaibhav Gupta
2020-08-17 8:16 ` [PATCH v2 00/15] scsi: " Vaibhav Gupta
2020-09-08 16:54 ` Vaibhav Gupta
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