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authorKristen Carlson Accardi <kristen.c.accardi@intel.com>2007-08-15 04:11:25 -0400
committerJeff Garzik <jeff@garzik.org>2007-10-12 14:55:33 -0400
commit2f2949680ad89d606db838340b17c30216c0bb0f (patch)
tree25d7918c7b846d151776bbdf6a111a1d241d6b05 /drivers
parent9f45cbd3f0fc597530aaf85cad7fe52cd63f1fd8 (diff)
[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 <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/ahci.c24
-rw-r--r--drivers/ata/libata-scsi.c18
2 files changed, 42 insertions, 0 deletions
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
@@ -3160,6 +3160,24 @@ 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
*