mtip32xx: convert to generic power management
Convert mtip32xx from legacy PCI power management to the generic power
management framework.
Previously, mtip32xx used legacy PCI power management, where
mtip_pci_suspend() and mtip_pci_resume() were responsible for both
device-specific things and generic PCI things:
mtip_pci_suspend
mtip_block_suspend(dd) <-- device-specific
pci_save_state(pdev) <-- generic PCI
pci_set_power_state(pdev, pci_choose_state(pdev, state))
mtip_pci_resume
pci_set_power_state(PCI_D0) <-- generic PCI
pci_restore_state(pdev) <-- generic PCI
pcim_enable_device(pdev) <-- generic PCI
pci_set_master(pdev) <-- generic PCI
mtip_block_resume(dd) <-- 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
mtip_pci_suspend # dev->driver->pm->suspend
mtip_block_suspend <-- device-specific
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
mtip_pci_resume # dev->driver->pm->resume
mtip_block_resume <-- device-specific
[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20210114115423.52414-2-vaibhavgupta40@gmail.com
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211208192449.146076-4-helgaas@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
cd97b7e0d7