diff options
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-eh.c | 74 | ||||
| -rw-r--r-- | drivers/ata/libata-sata.c | 75 |
2 files changed, 75 insertions, 74 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 8dc33b6832f0..ef4d606cd8c6 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1093,80 +1093,6 @@ int ata_port_freeze(struct ata_port *ap) EXPORT_SYMBOL_GPL(ata_port_freeze); /** - * sata_async_notification - SATA async notification handler - * @ap: ATA port where async notification is received - * - * Handler to be called when async notification via SDB FIS is - * received. This function schedules EH if necessary. - * - * LOCKING: - * spin_lock_irqsave(host lock) - * - * RETURNS: - * 1 if EH is scheduled, 0 otherwise. - */ -int sata_async_notification(struct ata_port *ap) -{ - u32 sntf; - int rc; - - if (!(ap->flags & ATA_FLAG_AN)) - return 0; - - rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); - if (rc == 0) - sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); - - if (!sata_pmp_attached(ap) || rc) { - /* PMP is not attached or SNTF is not available */ - if (!sata_pmp_attached(ap)) { - /* PMP is not attached. Check whether ATAPI - * AN is configured. If so, notify media - * change. - */ - struct ata_device *dev = ap->link.device; - - if ((dev->class == ATA_DEV_ATAPI) && - (dev->flags & ATA_DFLAG_AN)) - ata_scsi_media_change_notify(dev); - return 0; - } else { - /* PMP is attached but SNTF is not available. - * ATAPI async media change notification is - * not used. The PMP must be reporting PHY - * status change, schedule EH. - */ - ata_port_schedule_eh(ap); - return 1; - } - } else { - /* PMP is attached and SNTF is available */ - struct ata_link *link; - - /* check and notify ATAPI AN */ - ata_for_each_link(link, ap, EDGE) { - if (!(sntf & (1 << link->pmp))) - continue; - - if ((link->device->class == ATA_DEV_ATAPI) && - (link->device->flags & ATA_DFLAG_AN)) - ata_scsi_media_change_notify(link->device); - } - - /* If PMP is reporting that PHY status of some - * downstream ports has changed, schedule EH. - */ - if (sntf & (1 << SATA_PMP_CTRL_PORT)) { - ata_port_schedule_eh(ap); - return 1; - } - - return 0; - } -} -EXPORT_SYMBOL_GPL(sata_async_notification); - -/** * ata_eh_freeze_port - EH helper to freeze port * @ap: ATA port to freeze * diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c index 2d934ccfc930..008468e516cd 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -4,6 +4,7 @@ * * Copyright 2003-2004 Red Hat, Inc. All rights reserved. * Copyright 2003-2004 Jeff Garzik + * Copyright 2006 Tejun Heo <htejun@gmail.com> */ #include <linux/kernel.h> @@ -1275,3 +1276,77 @@ void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) { clear_bit(tag, &ap->sas_tag_allocated); } + +/** + * sata_async_notification - SATA async notification handler + * @ap: ATA port where async notification is received + * + * Handler to be called when async notification via SDB FIS is + * received. This function schedules EH if necessary. + * + * LOCKING: + * spin_lock_irqsave(host lock) + * + * RETURNS: + * 1 if EH is scheduled, 0 otherwise. + */ +int sata_async_notification(struct ata_port *ap) +{ + u32 sntf; + int rc; + + if (!(ap->flags & ATA_FLAG_AN)) + return 0; + + rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); + if (rc == 0) + sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); + + if (!sata_pmp_attached(ap) || rc) { + /* PMP is not attached or SNTF is not available */ + if (!sata_pmp_attached(ap)) { + /* PMP is not attached. Check whether ATAPI + * AN is configured. If so, notify media + * change. + */ + struct ata_device *dev = ap->link.device; + + if ((dev->class == ATA_DEV_ATAPI) && + (dev->flags & ATA_DFLAG_AN)) + ata_scsi_media_change_notify(dev); + return 0; + } else { + /* PMP is attached but SNTF is not available. + * ATAPI async media change notification is + * not used. The PMP must be reporting PHY + * status change, schedule EH. + */ + ata_port_schedule_eh(ap); + return 1; + } + } else { + /* PMP is attached and SNTF is available */ + struct ata_link *link; + + /* check and notify ATAPI AN */ + ata_for_each_link(link, ap, EDGE) { + if (!(sntf & (1 << link->pmp))) + continue; + + if ((link->device->class == ATA_DEV_ATAPI) && + (link->device->flags & ATA_DFLAG_AN)) + ata_scsi_media_change_notify(link->device); + } + + /* If PMP is reporting that PHY status of some + * downstream ports has changed, schedule EH. + */ + if (sntf & (1 << SATA_PMP_CTRL_PORT)) { + ata_port_schedule_eh(ap); + return 1; + } + + return 0; + } +} +EXPORT_SYMBOL_GPL(sata_async_notification); |