diff options
Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r-- | drivers/ata/libata-core.c | 201 |
1 files changed, 1 insertions, 200 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index b8024451234..7c5538b9fa3 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1028,182 +1028,6 @@ const char *sata_spd_string(unsigned int spd) return spd_str[spd - 1]; } -static int ata_dev_set_dipm(struct ata_device *dev, enum ata_lpm_policy policy) -{ - struct ata_link *link = dev->link; - struct ata_port *ap = link->ap; - u32 scontrol; - unsigned int err_mask; - int rc; - - /* - * disallow DIPM for drivers which haven't set - * ATA_FLAG_LPM. This is because when DIPM is enabled, - * phy ready will be set in the interrupt status on - * state changes, which will cause some drivers to - * think there are errors - additionally drivers will - * need to disable hot plug. - */ - if (!(ap->flags & ATA_FLAG_LPM) || !ata_dev_enabled(dev)) { - ap->lpm_policy = ATA_LPM_UNKNOWN; - return -EINVAL; - } - - /* - * For DIPM, we will only enable it for the - * min_power setting. - * - * Why? Because Disks are too stupid to know that - * If the host rejects a request to go to SLUMBER - * they should retry at PARTIAL, and instead it - * just would give up. So, for medium_power to - * work at all, we need to only allow HIPM. - */ - rc = sata_scr_read(link, SCR_CONTROL, &scontrol); - if (rc) - return rc; - - switch (policy) { - case ATA_LPM_MIN_POWER: - /* no restrictions on LPM transitions */ - scontrol &= ~(0x3 << 8); - rc = sata_scr_write(link, SCR_CONTROL, scontrol); - if (rc) - return rc; - - /* enable DIPM */ - if (dev->flags & ATA_DFLAG_DIPM) - err_mask = ata_dev_set_feature(dev, - SETFEATURES_SATA_ENABLE, SATA_DIPM); - break; - case ATA_LPM_MED_POWER: - /* allow LPM to PARTIAL */ - scontrol &= ~(0x1 << 8); - scontrol |= (0x2 << 8); - rc = sata_scr_write(link, SCR_CONTROL, scontrol); - if (rc) - return rc; - - /* - * we don't have to disable DIPM since LPM flags - * disallow transitions to SLUMBER, which effectively - * disable DIPM if it does not support PARTIAL - */ - break; - case ATA_LPM_UNKNOWN: - case ATA_LPM_MAX_POWER: - /* disable all LPM transitions */ - scontrol |= (0x3 << 8); - rc = sata_scr_write(link, SCR_CONTROL, scontrol); - if (rc) - return rc; - - /* - * we don't have to disable DIPM since LPM flags - * disallow all transitions which effectively - * disable DIPM anyway. - */ - break; - } - - /* FIXME: handle SET FEATURES failure */ - (void) err_mask; - - return 0; -} - -/** - * ata_dev_enable_pm - enable SATA interface power management - * @dev: device to enable power management - * @policy: the link power management policy - * - * Enable SATA Interface power management. This will enable - * Device Interface Power Management (DIPM) for min_power - * policy, and then call driver specific callbacks for - * enabling Host Initiated Power management. - * - * Locking: Caller. - * Returns: -EINVAL if LPM is not supported, 0 otherwise. - */ -void ata_dev_enable_pm(struct ata_device *dev, enum ata_lpm_policy policy) -{ - int rc = 0; - struct ata_port *ap = dev->link->ap; - - /* set HIPM first, then DIPM */ - if (ap->ops->enable_pm) - rc = ap->ops->enable_pm(ap, policy); - if (rc) - goto enable_pm_out; - rc = ata_dev_set_dipm(dev, policy); - -enable_pm_out: - if (rc) - ap->lpm_policy = ATA_LPM_MAX_POWER; - else - ap->lpm_policy = policy; - return /* rc */; /* hopefully we can use 'rc' eventually */ -} - -#ifdef CONFIG_PM -/** - * ata_dev_disable_pm - disable SATA interface power management - * @dev: device to disable power management - * - * Disable SATA Interface power management. This will disable - * Device Interface Power Management (DIPM) without changing - * policy, call driver specific callbacks for disabling Host - * Initiated Power management. - * - * Locking: Caller. - * Returns: void - */ -static void ata_dev_disable_pm(struct ata_device *dev) -{ - struct ata_port *ap = dev->link->ap; - - ata_dev_set_dipm(dev, ATA_LPM_MAX_POWER); - if (ap->ops->disable_pm) - ap->ops->disable_pm(ap); -} -#endif /* CONFIG_PM */ - -void ata_lpm_schedule(struct ata_port *ap, enum ata_lpm_policy policy) -{ - ap->lpm_policy = policy; - ap->link.eh_info.action |= ATA_EH_LPM; - ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; - ata_port_schedule_eh(ap); -} - -#ifdef CONFIG_PM -static void ata_lpm_enable(struct ata_host *host) -{ - struct ata_link *link; - struct ata_port *ap; - struct ata_device *dev; - int i; - - for (i = 0; i < host->n_ports; i++) { - ap = host->ports[i]; - ata_for_each_link(link, ap, EDGE) { - ata_for_each_dev(dev, link, ALL) - ata_dev_disable_pm(dev); - } - } -} - -static void ata_lpm_disable(struct ata_host *host) -{ - int i; - - for (i = 0; i < host->n_ports; i++) { - struct ata_port *ap = host->ports[i]; - ata_lpm_schedule(ap, ap->lpm_policy); - } -} -#endif /* CONFIG_PM */ - /** * ata_dev_classify - determine device type based on ATA-spec signature * @tf: ATA taskfile register set for device to be identified @@ -2562,13 +2386,6 @@ int ata_dev_configure(struct ata_device *dev) if (dev->flags & ATA_DFLAG_LBA48) dev->max_sectors = ATA_MAX_SECTORS_LBA48; - if (!(dev->horkage & ATA_HORKAGE_LPM)) { - if (ata_id_has_hipm(dev->id)) - dev->flags |= ATA_DFLAG_HIPM; - if (ata_id_has_dipm(dev->id)) - dev->flags |= ATA_DFLAG_DIPM; - } - /* Limit PATA drive on SATA cable bridge transfers to udma5, 200 sectors */ if (ata_dev_knobble(dev)) { @@ -2589,13 +2406,6 @@ int ata_dev_configure(struct ata_device *dev) dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, dev->max_sectors); - if (ata_dev_blacklisted(dev) & ATA_HORKAGE_LPM) { - dev->horkage |= ATA_HORKAGE_LPM; - - /* reset link pm_policy for this port to no pm */ - ap->lpm_policy = ATA_LPM_MAX_POWER; - } - if (ap->ops->dev_config) ap->ops->dev_config(dev); @@ -5495,12 +5305,6 @@ int ata_host_suspend(struct ata_host *host, pm_message_t mesg) int rc; /* - * disable link pm on all ports before requesting - * any pm activity - */ - ata_lpm_enable(host); - - /* * On some hardware, device fails to respond after spun down * for suspend. As the device won't be used before being * resumed, we don't need to touch the device. Ask EH to skip @@ -5533,9 +5337,6 @@ void ata_host_resume(struct ata_host *host) ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); host->dev->power.power_state = PMSG_ON; - - /* reenable link pm */ - ata_lpm_disable(host); } #endif @@ -6096,7 +5897,7 @@ static void async_port_probe(void *data, async_cookie_t cookie) spin_lock_irqsave(ap->lock, flags); ehi->probe_mask |= ATA_ALL_DEVICES; - ehi->action |= ATA_EH_RESET | ATA_EH_LPM; + ehi->action |= ATA_EH_RESET; ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; ap->pflags &= ~ATA_PFLAG_INITIALIZING; |