diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2014-03-18 22:52:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-03 19:20:24 -0400 |
| commit | 180ea05bcedbd67bb22a426bb8d831075727e34a (patch) | |
| tree | 05e5918348bc422a5df912204b6f8c36f44c3e13 /drivers/misc/mei/pci-me.c | |
| parent | a532bbedc85ff3b834ba81e49163a3f543be1775 (diff) | |
mei: me: add runtime pm framework
Add runtime pm framework for ME devices.
The runtime pm handlers are used to run
me power gating isolation protocol
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/pci-me.c')
| -rw-r--r-- | drivers/misc/mei/pci-me.c | 92 |
1 files changed, 90 insertions, 2 deletions
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index 95889e2e31ff..fcbf270c2c2a 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -33,6 +33,8 @@ #include <linux/interrupt.h> #include <linux/miscdevice.h> +#include <linux/pm_runtime.h> + #include <linux/mei.h> #include "mei_dev.h" @@ -212,6 +214,9 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto release_irq; } + pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); + pm_runtime_use_autosuspend(&pdev->dev); + err = mei_register(dev); if (err) goto release_irq; @@ -220,6 +225,9 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) schedule_delayed_work(&dev->timer_work, HZ); + if (mei_pg_is_enabled(dev)) + pm_runtime_put_noidle(&pdev->dev); + dev_dbg(&pdev->dev, "initialization successful.\n"); return 0; @@ -259,6 +267,9 @@ static void mei_me_remove(struct pci_dev *pdev) if (!dev) return; + if (mei_pg_is_enabled(dev)) + pm_runtime_get_noresume(&pdev->dev); + hw = to_me_hw(dev); @@ -343,12 +354,89 @@ static int mei_me_pci_resume(struct device *device) return 0; } +#endif /* CONFIG_PM_SLEEP */ + +#ifdef CONFIG_PM_RUNTIME +static int mei_me_pm_runtime_idle(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct mei_device *dev; + + dev_dbg(&pdev->dev, "rpm: me: runtime_idle\n"); + + dev = pci_get_drvdata(pdev); + if (!dev) + return -ENODEV; + if (mei_write_is_idle(dev)) + pm_schedule_suspend(device, MEI_ME_RPM_TIMEOUT * 2); + + return -EBUSY; +} + +static int mei_me_pm_runtime_suspend(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct mei_device *dev; + int ret; + + dev_dbg(&pdev->dev, "rpm: me: runtime suspend\n"); + + dev = pci_get_drvdata(pdev); + if (!dev) + return -ENODEV; + + mutex_lock(&dev->device_lock); + + if (mei_write_is_idle(dev)) + ret = mei_me_pg_set_sync(dev); + else + ret = -EAGAIN; + + mutex_unlock(&dev->device_lock); + + dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret); + + return ret; +} + +static int mei_me_pm_runtime_resume(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct mei_device *dev; + int ret; + + dev_dbg(&pdev->dev, "rpm: me: runtime resume\n"); + + dev = pci_get_drvdata(pdev); + if (!dev) + return -ENODEV; + + mutex_lock(&dev->device_lock); + + ret = mei_me_pg_unset_sync(dev); + + mutex_unlock(&dev->device_lock); + + dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret); + + return ret; +} +#endif /* CONFIG_PM_RUNTIME */ + +#ifdef CONFIG_PM +static const struct dev_pm_ops mei_me_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, + mei_me_pci_resume) + SET_RUNTIME_PM_OPS( + mei_me_pm_runtime_suspend, + mei_me_pm_runtime_resume, + mei_me_pm_runtime_idle) +}; -static SIMPLE_DEV_PM_OPS(mei_me_pm_ops, mei_me_pci_suspend, mei_me_pci_resume); #define MEI_ME_PM_OPS (&mei_me_pm_ops) #else #define MEI_ME_PM_OPS NULL -#endif /* CONFIG_PM_SLEEP */ +#endif /* CONFIG_PM */ /* * PCI driver structure */ |