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authorVaibhav Gupta <vaibhavgupta40@gmail.com>2021-01-12 13:39:22 +0530
committerBjorn Helgaas <bhelgaas@google.com>2021-12-14 11:25:15 -0600
commitec4e4a6fdc51f11eaa7a919e3e2a5f5a65532a6c (patch)
tree9c03d71da00b3b4f5ab14d1b13e7dcae5b69f79d
parentfa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf (diff)
amd64-agp: convert to generic power management
Convert amd64-agp from legacy PCI power management to the generic power management framework. Previously, amd64-agp used legacy PCI power management, and agp_amd64_suspend() and agp_amd64_resume() were responsible for both device-specific things and generic PCI things: agp_amd64_suspend pci_save_state(pdev) <-- generic PCI pci_set_power_state(pdev, pci_choose_state(pdev, state)) <-- generic PCI agp_amd64_resume pci_set_power_state(pdev, PCI_D0) <-- generic PCI pci_restore_state(pdev) <-- generic PCI nforce3_agp_init() <-- device-specific amd_8151_configure() <-- device-specific With generic power management, the PCI bus PM methods do the generic PCI things, and the driver needs only the device-specific part, i.e., suspend_devices_and_enter dpm_suspend_start(PMSG_SUSPEND) pci_pm_suspend # PCI bus .suspend() method agp_amd64_suspend <-- not needed at all; removed suspend_enter dpm_suspend_noirq(PMSG_SUSPEND) pci_pm_suspend_noirq # PCI bus .suspend_noirq() method pci_save_state <-- generic PCI pci_prepare_to_sleep <-- generic PCI pci_set_power_state ... dpm_resume_end(PMSG_RESUME) pci_pm_resume # PCI bus .resume() method pci_restore_standard_config pci_set_power_state(PCI_D0) <-- generic PCI pci_restore_state <-- generic PCI agp_amd64_resume # dev->driver->pm->resume nforce3_agp_init() <-- device-specific amd_8151_configure() <-- device-specific [bhelgaas: commit log] Link: https://lore.kernel.org/r/20211208193305.147072-2-helgaas@kernel.org Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/char/agp/amd64-agp.c24
1 files changed, 6 insertions, 18 deletions
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index b40edae32817..dc78a4fb879e 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -588,20 +588,11 @@ static void agp_amd64_remove(struct pci_dev *pdev)
agp_bridges_found--;
}
-#ifdef CONFIG_PM
+#define agp_amd64_suspend NULL
-static int agp_amd64_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused agp_amd64_resume(struct device *dev)
{
- pci_save_state(pdev);
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
-
- return 0;
-}
-
-static int agp_amd64_resume(struct pci_dev *pdev)
-{
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
+ struct pci_dev *pdev = to_pci_dev(dev);
if (pdev->vendor == PCI_VENDOR_ID_NVIDIA)
nforce3_agp_init(pdev);
@@ -609,8 +600,6 @@ static int agp_amd64_resume(struct pci_dev *pdev)
return amd_8151_configure();
}
-#endif /* CONFIG_PM */
-
static const struct pci_device_id agp_amd64_pci_table[] = {
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
@@ -738,15 +727,14 @@ static const struct pci_device_id agp_amd64_pci_promisc_table[] = {
{ }
};
+static SIMPLE_DEV_PM_OPS(agp_amd64_pm_ops, agp_amd64_suspend, agp_amd64_resume);
+
static struct pci_driver agp_amd64_pci_driver = {
.name = "agpgart-amd64",
.id_table = agp_amd64_pci_table,
.probe = agp_amd64_probe,
.remove = agp_amd64_remove,
-#ifdef CONFIG_PM
- .suspend = agp_amd64_suspend,
- .resume = agp_amd64_resume,
-#endif
+ .driver.pm = &agp_amd64_pm_ops,
};