Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754295Ab2FRG0l (ORCPT ); Mon, 18 Jun 2012 02:26:41 -0400 Received: from mga11.intel.com ([192.55.52.93]:63878 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753603Ab2FRG0i (ORCPT ); Mon, 18 Jun 2012 02:26:38 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="181387343" From: Lin Ming To: Jeff Garzik , Aaron Lu , Holger Macht , Matthew Garrett , Alan Cox , David Woodhouse Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH v5 06/12] libata-acpi: add ata port runtime D3Cold support Date: Mon, 18 Jun 2012 14:26:00 +0800 Message-Id: <1340000766-129148-7-git-send-email-ming.m.lin@intel.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1340000766-129148-1-git-send-email-ming.m.lin@intel.com> References: <1340000766-129148-1-git-send-email-ming.m.lin@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4984 Lines: 164 ATA port may support runtime D3Cold state, for example, Zero-power ODD case. This patch adds wakeup notifier and enable/disable run_wake during supend/resume. Signed-off-by: Lin Ming --- drivers/ata/libata-acpi.c | 77 ++++++++++++++++++++++++++++++++++++++++++--- drivers/ata/libata-scsi.c | 3 ++ drivers/ata/libata.h | 4 +++ 3 files changed, 80 insertions(+), 4 deletions(-) diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 2887eb0..3f7d376 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include "libata.h" @@ -863,10 +864,23 @@ void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) ata_for_each_dev(dev, &ap->link, ENABLED) { handle = ata_dev_acpi_handle(dev); - if (handle) - acpi_bus_set_power(handle, - state.event == PM_EVENT_ON ? - ACPI_STATE_D0 : ACPI_STATE_D3); + if (!handle) + continue; + + if (state.event != PM_EVENT_ON) { + acpi_state = acpi_pm_device_sleep_state( + &dev->sdev->sdev_gendev, NULL); + if (acpi_state > 0) + acpi_bus_set_power(handle, acpi_state); + /* TBD: need to check if it's runtime pm request */ + acpi_pm_device_run_wake( + &dev->sdev->sdev_gendev, true); + } else { + /* Ditto */ + acpi_pm_device_run_wake( + &dev->sdev->sdev_gendev, false); + acpi_bus_set_power(handle, ACPI_STATE_D0); + } } handle = ata_ap_acpi_handle(ap); @@ -966,6 +980,61 @@ void ata_acpi_on_disable(struct ata_device *dev) ata_acpi_clear_gtf(dev); } +static void ata_acpi_wake_dev(acpi_handle handle, u32 event, void *context) +{ + struct ata_device *ata_dev = context; + + if (event == ACPI_NOTIFY_DEVICE_WAKE && ata_dev && + pm_runtime_suspended(&ata_dev->sdev->sdev_gendev)) + scsi_autopm_get_device(ata_dev->sdev); +} + +static void ata_acpi_add_pm_notifier(struct ata_device *dev) +{ + struct acpi_device *acpi_dev; + acpi_handle handle; + acpi_status status; + + handle = ata_dev_acpi_handle(dev); + if (!handle) + return; + + status = acpi_bus_get_device(handle, &acpi_dev); + if (ACPI_SUCCESS(status)) { + acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + ata_acpi_wake_dev, dev); + device_set_run_wake(&dev->sdev->sdev_gendev, true); + } +} + +static void ata_acpi_remove_pm_notifier(struct ata_device *dev) +{ + struct acpi_device *acpi_dev; + acpi_handle handle; + acpi_status status; + + handle = ata_dev_acpi_handle(dev); + if (!handle) + return; + + status = acpi_bus_get_device(handle, &acpi_dev); + if (ACPI_SUCCESS(status)) { + device_set_run_wake(&dev->sdev->sdev_gendev, false); + acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + ata_acpi_wake_dev); + } +} + +void ata_acpi_bind(struct ata_device *dev) +{ + ata_acpi_add_pm_notifier(dev); +} + +void ata_acpi_unbind(struct ata_device *dev) +{ + ata_acpi_remove_pm_notifier(dev); +} + static int compat_pci_ata(struct device *dev) { struct pci_dev *pdev; diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 2222635..8ec81ca 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3445,6 +3445,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync) if (!IS_ERR(sdev)) { dev->sdev = sdev; scsi_device_put(sdev); + ata_acpi_bind(dev); } else { dev->sdev = NULL; } @@ -3541,6 +3542,8 @@ static void ata_scsi_remove_dev(struct ata_device *dev) mutex_lock(&ap->scsi_host->scan_mutex); spin_lock_irqsave(ap->lock, flags); + ata_acpi_unbind(dev); + /* clearing dev->sdev is protected by host lock */ sdev = dev->sdev; dev->sdev = NULL; diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 6aba606..b0ba924 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -118,6 +118,8 @@ extern void ata_acpi_on_disable(struct ata_device *dev); extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state); extern int ata_acpi_register(void); extern void ata_acpi_unregister(void); +extern void ata_acpi_bind(struct ata_device *dev); +extern void ata_acpi_unbind(struct ata_device *dev); #else static inline void ata_acpi_dissociate(struct ata_host *host) { } static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; } @@ -128,6 +130,8 @@ static inline void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) { } static inline int ata_acpi_register(void) { return 0; } static void ata_acpi_unregister(void) { } +static void ata_acpi_bind(struct ata_device *dev) { } +static void ata_acpi_unbind(struct ata_device *dev) { } #endif /* libata-scsi.c */ -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/