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Date: Wed, 22 Apr 2020 16:10:24 -0400
From: Alex Deucher <alexdeucher@...il.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Linux PM <linux-pm@...r.kernel.org>,
Alan Stern <stern@...land.harvard.edu>,
Ulf Hansson <ulf.hansson@...aro.org>,
Hans De Goede <hdegoede@...hat.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Intel Graphics <intel-gfx@...ts.freedesktop.org>,
LKML <linux-kernel@...r.kernel.org>,
DRI-devel <dri-devel@...ts.freedesktop.org>,
Linux ACPI <linux-acpi@...r.kernel.org>,
Bjorn Helgaas <helgaas@...nel.org>,
Linux PCI <linux-pci@...r.kernel.org>,
intel-wired-lan@...ts.osuosl.org,
Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: Re: [PATCH v2 7/9] PM: sleep: core: Rename DPM_FLAG_NEVER_SKIP
On Sat, Apr 18, 2020 at 1:11 PM Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> From: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
>
> Rename DPM_FLAG_NEVER_SKIP to DPM_FLAG_NO_DIRECT_COMPLETE which
> matches its purpose more closely.
>
> No functional impact.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Acked-by: Bjorn Helgaas <bhelgaas@...gle.com> # for PCI parts
> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Acked-by: Alex Deucher <alexander.deucher@....com>
for radeon and amdgpu
Alex
> ---
>
> -> v2:
> * Rebased.
> * Added tags received so far.
>
> ---
> Documentation/driver-api/pm/devices.rst | 6 +++---
> Documentation/power/pci.rst | 10 +++++-----
> drivers/base/power/main.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 2 +-
> drivers/gpu/drm/i915/intel_runtime_pm.c | 2 +-
> drivers/gpu/drm/radeon/radeon_kms.c | 2 +-
> drivers/misc/mei/pci-me.c | 2 +-
> drivers/misc/mei/pci-txe.c | 2 +-
> drivers/net/ethernet/intel/e1000e/netdev.c | 2 +-
> drivers/net/ethernet/intel/igb/igb_main.c | 2 +-
> drivers/net/ethernet/intel/igc/igc_main.c | 2 +-
> drivers/pci/pcie/portdrv_pci.c | 2 +-
> include/linux/pm.h | 6 +++---
> 13 files changed, 21 insertions(+), 21 deletions(-)
>
> diff --git a/Documentation/driver-api/pm/devices.rst b/Documentation/driver-api/pm/devices.rst
> index f66c7b9126ea..4ace0eba4506 100644
> --- a/Documentation/driver-api/pm/devices.rst
> +++ b/Documentation/driver-api/pm/devices.rst
> @@ -361,9 +361,9 @@ the phases are: ``prepare``, ``suspend``, ``suspend_late``, ``suspend_noirq``.
> runtime PM disabled.
>
> This feature also can be controlled by device drivers by using the
> - ``DPM_FLAG_NEVER_SKIP`` and ``DPM_FLAG_SMART_PREPARE`` driver power
> - management flags. [Typically, they are set at the time the driver is
> - probed against the device in question by passing them to the
> + ``DPM_FLAG_NO_DIRECT_COMPLETE`` and ``DPM_FLAG_SMART_PREPARE`` driver
> + power management flags. [Typically, they are set at the time the driver
> + is probed against the device in question by passing them to the
> :c:func:`dev_pm_set_driver_flags` helper function.] If the first of
> these flags is set, the PM core will not apply the direct-complete
> procedure described above to the given device and, consequenty, to any
> diff --git a/Documentation/power/pci.rst b/Documentation/power/pci.rst
> index aa1c7fce6cd0..9e1408121bea 100644
> --- a/Documentation/power/pci.rst
> +++ b/Documentation/power/pci.rst
> @@ -1004,11 +1004,11 @@ including the PCI bus type. The flags should be set once at the driver probe
> time with the help of the dev_pm_set_driver_flags() function and they should not
> be updated directly afterwards.
>
> -The DPM_FLAG_NEVER_SKIP flag prevents the PM core from using the direct-complete
> -mechanism allowing device suspend/resume callbacks to be skipped if the device
> -is in runtime suspend when the system suspend starts. That also affects all of
> -the ancestors of the device, so this flag should only be used if absolutely
> -necessary.
> +The DPM_FLAG_NO_DIRECT_COMPLETE flag prevents the PM core from using the
> +direct-complete mechanism allowing device suspend/resume callbacks to be skipped
> +if the device is in runtime suspend when the system suspend starts. That also
> +affects all of the ancestors of the device, so this flag should only be used if
> +absolutely necessary.
>
> The DPM_FLAG_SMART_PREPARE flag instructs the PCI bus type to only return a
> positive value from pci_pm_prepare() if the ->prepare callback provided by the
> diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
> index 3170d93e29f9..dbc1e5e7346b 100644
> --- a/drivers/base/power/main.c
> +++ b/drivers/base/power/main.c
> @@ -1844,7 +1844,7 @@ static int device_prepare(struct device *dev, pm_message_t state)
> spin_lock_irq(&dev->power.lock);
> dev->power.direct_complete = state.event == PM_EVENT_SUSPEND &&
> (ret > 0 || dev->power.no_pm_callbacks) &&
> - !dev_pm_test_driver_flags(dev, DPM_FLAG_NEVER_SKIP);
> + !dev_pm_test_driver_flags(dev, DPM_FLAG_NO_DIRECT_COMPLETE);
> spin_unlock_irq(&dev->power.lock);
> return 0;
> }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index fd1dc3236eca..a9086ea1ab60 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -191,7 +191,7 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
> }
>
> if (adev->runpm) {
> - dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
> pm_runtime_use_autosuspend(dev->dev);
> pm_runtime_set_autosuspend_delay(dev->dev, 5000);
> pm_runtime_set_active(dev->dev);
> diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
> index ad719c9602af..9cb2d7548daa 100644
> --- a/drivers/gpu/drm/i915/intel_runtime_pm.c
> +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
> @@ -549,7 +549,7 @@ void intel_runtime_pm_enable(struct intel_runtime_pm *rpm)
> * becaue the HDA driver may require us to enable the audio power
> * domain during system suspend.
> */
> - dev_pm_set_driver_flags(kdev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(kdev, DPM_FLAG_NO_DIRECT_COMPLETE);
>
> pm_runtime_set_autosuspend_delay(kdev, 10000); /* 10s */
> pm_runtime_mark_last_busy(kdev);
> diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
> index 58176db85952..372962358a18 100644
> --- a/drivers/gpu/drm/radeon/radeon_kms.c
> +++ b/drivers/gpu/drm/radeon/radeon_kms.c
> @@ -158,7 +158,7 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
> }
>
> if (radeon_is_px(dev)) {
> - dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
> pm_runtime_use_autosuspend(dev->dev);
> pm_runtime_set_autosuspend_delay(dev->dev, 5000);
> pm_runtime_set_active(dev->dev);
> diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
> index 3d21c38e2dbb..53f16f3bd091 100644
> --- a/drivers/misc/mei/pci-me.c
> +++ b/drivers/misc/mei/pci-me.c
> @@ -240,7 +240,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> * MEI requires to resume from runtime suspend mode
> * in order to perform link reset flow upon system suspend.
> */
> - dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
>
> /*
> * ME maps runtime suspend/resume to D0i states,
> diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c
> index beacf2a2f2b5..4bf26ce61044 100644
> --- a/drivers/misc/mei/pci-txe.c
> +++ b/drivers/misc/mei/pci-txe.c
> @@ -128,7 +128,7 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> * MEI requires to resume from runtime suspend mode
> * in order to perform link reset flow upon system suspend.
> */
> - dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
>
> /*
> * TXE maps runtime suspend/resume to own power gating states,
> diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
> index 177c6da80c57..2730b1c7dddb 100644
> --- a/drivers/net/ethernet/intel/e1000e/netdev.c
> +++ b/drivers/net/ethernet/intel/e1000e/netdev.c
> @@ -7549,7 +7549,7 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>
> e1000_print_device_info(adapter);
>
> - dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
>
> if (pci_dev_run_wake(pdev) && hw->mac.type < e1000_pch_cnp)
> pm_runtime_put_noidle(&pdev->dev);
> diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
> index b46bff8fe056..8bb3db2cbd41 100644
> --- a/drivers/net/ethernet/intel/igb/igb_main.c
> +++ b/drivers/net/ethernet/intel/igb/igb_main.c
> @@ -3445,7 +3445,7 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> }
> }
>
> - dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
>
> pm_runtime_put_noidle(&pdev->dev);
> return 0;
> diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
> index 69fa1ce1f927..59fc0097438f 100644
> --- a/drivers/net/ethernet/intel/igc/igc_main.c
> +++ b/drivers/net/ethernet/intel/igc/igc_main.c
> @@ -4825,7 +4825,7 @@ static int igc_probe(struct pci_dev *pdev,
> pcie_print_link_status(pdev);
> netdev_info(netdev, "MAC: %pM\n", netdev->dev_addr);
>
> - dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
> + dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
>
> pm_runtime_put_noidle(&pdev->dev);
>
> diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
> index 160d67c59310..3acf151ae015 100644
> --- a/drivers/pci/pcie/portdrv_pci.c
> +++ b/drivers/pci/pcie/portdrv_pci.c
> @@ -115,7 +115,7 @@ static int pcie_portdrv_probe(struct pci_dev *dev,
>
> pci_save_state(dev);
>
> - dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NEVER_SKIP |
> + dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE |
> DPM_FLAG_SMART_SUSPEND);
>
> if (pci_bridge_d3_possible(dev)) {
> diff --git a/include/linux/pm.h b/include/linux/pm.h
> index 8c59a7f0bcf4..cdb8fbd6ab18 100644
> --- a/include/linux/pm.h
> +++ b/include/linux/pm.h
> @@ -544,7 +544,7 @@ struct pm_subsys_data {
> * These flags can be set by device drivers at the probe time. They need not be
> * cleared by the drivers as the driver core will take care of that.
> *
> - * NEVER_SKIP: Do not skip all system suspend/resume callbacks for the device.
> + * NO_DIRECT_COMPLETE: Do not apply direct-complete optimization to the device.
> * SMART_PREPARE: Check the return value of the driver's ->prepare callback.
> * SMART_SUSPEND: No need to resume the device from runtime suspend.
> * LEAVE_SUSPENDED: Avoid resuming the device during system resume if possible.
> @@ -554,7 +554,7 @@ struct pm_subsys_data {
> * their ->prepare callbacks if the driver's ->prepare callback returns 0 (in
> * other words, the system suspend/resume callbacks can only be skipped for the
> * device if its driver doesn't object against that). This flag has no effect
> - * if NEVER_SKIP is set.
> + * if NO_DIRECT_COMPLETE is set.
> *
> * Setting SMART_SUSPEND instructs bus types and PM domains which may want to
> * runtime resume the device upfront during system suspend that doing so is not
> @@ -565,7 +565,7 @@ struct pm_subsys_data {
> * Setting LEAVE_SUSPENDED informs the PM core and middle-layer code that the
> * driver prefers the device to be left in suspend after system resume.
> */
> -#define DPM_FLAG_NEVER_SKIP BIT(0)
> +#define DPM_FLAG_NO_DIRECT_COMPLETE BIT(0)
> #define DPM_FLAG_SMART_PREPARE BIT(1)
> #define DPM_FLAG_SMART_SUSPEND BIT(2)
> #define DPM_FLAG_LEAVE_SUSPENDED BIT(3)
> --
> 2.16.4
>
>
>
>
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