From 2f2949680ad89d606db838340b17c30216c0bb0f Mon Sep 17 00:00:00 2001 From: Kristen Carlson Accardi Date: Wed, 15 Aug 2007 04:11:25 -0400 Subject: [PATCH] [libata] ahci: send event when AN received When we get an SDB FIS with the 'N' bit set, we should send an event to user space to indicate that there has been a media change. This will be done via the scsi device. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Jeff Garzik --- drivers/ata/ahci.c | 24 ++++++++++++++++++++++++ drivers/ata/libata-scsi.c | 18 ++++++++++++++++++ include/linux/libata.h | 1 + 3 files changed, 43 insertions(+) diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 483733783cf8..d52b73ab795a 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1368,6 +1368,30 @@ static void ahci_port_intr(struct ata_port *ap) return; } + if (status & PORT_IRQ_SDB_FIS) { + /* + * if this is an ATAPI device with AN turned on, + * then we should interrogate the device to + * determine the cause of the interrupt + * + * for AN - this we should check the SDB FIS + * and find the I and N bits set + */ + const __le32 *f = pp->rx_fis + RX_FIS_SDB; + u32 f0 = le32_to_cpu(f[0]); + + /* check the 'N' bit in word 0 of the FIS */ + if (f0 & (1 << 15)) { + int port_addr = ((f0 & 0x00000f00) >> 8); + struct ata_device *adev; + if (port_addr < ATA_MAX_DEVICES) { + adev = &ap->link.device[port_addr]; + if (adev->flags & ATA_DFLAG_AN) + ata_scsi_media_change_notify(adev); + } + } + } + if (ap->link.sactive) qc_active = readl(port_mmio + PORT_SCR_ACT); else diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 7d66c986a54c..f0f586b56c20 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3159,6 +3159,24 @@ static void ata_scsi_handle_link_detach(struct ata_link *link) } } +/** + * ata_scsi_media_change_notify - send media change event + * @atadev: Pointer to the disk device with media change event + * + * Tell the block layer to send a media change notification + * event. + * + * LOCKING: + * interrupt context, may not sleep. + */ +void ata_scsi_media_change_notify(struct ata_device *atadev) +{ +#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED + scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE); +#endif +} +EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify); + /** * ata_scsi_hotplug - SCSI part of hotplug * @work: Pointer to ATA port to perform SCSI hotplug on diff --git a/include/linux/libata.h b/include/linux/libata.h index 6dd5b437210d..d98e8b50e20c 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -755,6 +755,7 @@ extern void ata_host_init(struct ata_host *, struct device *, extern int ata_scsi_detect(struct scsi_host_template *sht); extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); +extern void ata_scsi_media_change_notify(struct ata_device *atadev); extern void ata_sas_port_destroy(struct ata_port *); extern struct ata_port *ata_sas_port_alloc(struct ata_host *, struct ata_port_info *, struct Scsi_Host *); -- 2.20.1