diff options
Diffstat (limited to 'drivers/misc/mei/pci-txe.c')
| -rw-r--r-- | drivers/misc/mei/pci-txe.c | 155 |
1 files changed, 149 insertions, 6 deletions
diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c index ad3adb009a1e..2343c6236df9 100644 --- a/drivers/misc/mei/pci-txe.c +++ b/drivers/misc/mei/pci-txe.c @@ -27,6 +27,7 @@ #include <linux/jiffies.h> #include <linux/interrupt.h> #include <linux/workqueue.h> +#include <linux/pm_runtime.h> #include <linux/mei.h> @@ -35,11 +36,18 @@ #include "hw-txe.h" static const struct pci_device_id mei_txe_pci_tbl[] = { - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0F18)}, /* Baytrail */ + {MEI_PCI_DEVICE(0x0F18, mei_txe_cfg)}, /* Baytrail */ {0, } }; MODULE_DEVICE_TABLE(pci, mei_txe_pci_tbl); +#ifdef CONFIG_PM_RUNTIME +static inline void mei_txe_set_pm_domain(struct mei_device *dev); +static inline void mei_txe_unset_pm_domain(struct mei_device *dev); +#else +static inline void mei_txe_set_pm_domain(struct mei_device *dev) {} +static inline void mei_txe_unset_pm_domain(struct mei_device *dev) {} +#endif /* CONFIG_PM_RUNTIME */ static void mei_txe_pci_iounmap(struct pci_dev *pdev, struct mei_txe_hw *hw) { @@ -61,6 +69,7 @@ static void mei_txe_pci_iounmap(struct pci_dev *pdev, struct mei_txe_hw *hw) */ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { + const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data); struct mei_device *dev; struct mei_txe_hw *hw; int err; @@ -91,7 +100,7 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } /* allocates and initializes the mei dev structure */ - dev = mei_txe_dev_init(pdev); + dev = mei_txe_dev_init(pdev, cfg); if (!dev) { err = -ENOMEM; goto release_regions; @@ -137,12 +146,25 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto release_irq; } + pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_TXI_RPM_TIMEOUT); + pm_runtime_use_autosuspend(&pdev->dev); + err = mei_register(dev); if (err) goto release_irq; pci_set_drvdata(pdev, dev); + /* + * For not wake-able HW runtime pm framework + * can't be used on pci device level. + * Use domain runtime pm callbacks instead. + */ + if (!pci_dev_run_wake(pdev)) + mei_txe_set_pm_domain(dev); + + pm_runtime_put_noidle(&pdev->dev); + return 0; release_irq: @@ -187,10 +209,15 @@ static void mei_txe_remove(struct pci_dev *pdev) return; } + pm_runtime_get_noresume(&pdev->dev); + hw = to_txe_hw(dev); mei_stop(dev); + if (!pci_dev_run_wake(pdev)) + mei_txe_unset_pm_domain(dev); + /* disable interrupts */ mei_disable_interrupts(dev); free_irq(pdev->irq, dev); @@ -265,15 +292,131 @@ static int mei_txe_pci_resume(struct device *device) return err; } +#endif /* CONFIG_PM_SLEEP */ + +#ifdef CONFIG_PM_RUNTIME +static int mei_txe_pm_runtime_idle(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct mei_device *dev; + + dev_dbg(&pdev->dev, "rpm: txe: runtime_idle\n"); + + dev = pci_get_drvdata(pdev); + if (!dev) + return -ENODEV; + if (mei_write_is_idle(dev)) + pm_schedule_suspend(device, MEI_TXI_RPM_TIMEOUT * 2); + + return -EBUSY; +} +static int mei_txe_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: txe: 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_txe_aliveness_set_sync(dev, 0); + else + ret = -EAGAIN; + + /* + * If everything is okay we're about to enter PCI low + * power state (D3) therefor we need to disable the + * interrupts towards host. + * However if device is not wakeable we do not enter + * D-low state and we need to keep the interrupt kicking + */ + if (!ret && pci_dev_run_wake(pdev)) + mei_disable_interrupts(dev); + + dev_dbg(&pdev->dev, "rpm: txe: runtime suspend ret=%d\n", ret); + + mutex_unlock(&dev->device_lock); + return ret; +} + +static int mei_txe_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: txe: runtime resume\n"); + + dev = pci_get_drvdata(pdev); + if (!dev) + return -ENODEV; + + mutex_lock(&dev->device_lock); + + mei_enable_interrupts(dev); + + ret = mei_txe_aliveness_set_sync(dev, 1); + + mutex_unlock(&dev->device_lock); + + dev_dbg(&pdev->dev, "rpm: txe: runtime resume ret = %d\n", ret); + + return ret; +} + +/** + * mei_txe_set_pm_domain - fill and set pm domian stucture for device + * + * @dev: mei_device + */ +static inline void mei_txe_set_pm_domain(struct mei_device *dev) +{ + struct pci_dev *pdev = dev->pdev; + + if (pdev->dev.bus && pdev->dev.bus->pm) { + dev->pg_domain.ops = *pdev->dev.bus->pm; + + dev->pg_domain.ops.runtime_suspend = mei_txe_pm_runtime_suspend; + dev->pg_domain.ops.runtime_resume = mei_txe_pm_runtime_resume; + dev->pg_domain.ops.runtime_idle = mei_txe_pm_runtime_idle; + + pdev->dev.pm_domain = &dev->pg_domain; + } +} -static SIMPLE_DEV_PM_OPS(mei_txe_pm_ops, - mei_txe_pci_suspend, - mei_txe_pci_resume); +/** + * mei_txe_unset_pm_domain - clean pm domian stucture for device + * + * @dev: mei_device + */ +static inline void mei_txe_unset_pm_domain(struct mei_device *dev) +{ + /* stop using pm callbacks if any */ + dev->pdev->dev.pm_domain = NULL; +} +#endif /* CONFIG_PM_RUNTIME */ + +#ifdef CONFIG_PM +static const struct dev_pm_ops mei_txe_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mei_txe_pci_suspend, + mei_txe_pci_resume) + SET_RUNTIME_PM_OPS( + mei_txe_pm_runtime_suspend, + mei_txe_pm_runtime_resume, + mei_txe_pm_runtime_idle) +}; #define MEI_TXE_PM_OPS (&mei_txe_pm_ops) #else #define MEI_TXE_PM_OPS NULL -#endif /* CONFIG_PM_SLEEP */ +#endif /* CONFIG_PM */ + /* * PCI driver structure */ |
