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. The ahci host controller will send the
event via KOBJ_CHANGE uevent.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
Index: 2.6-git/drivers/ata/ahci.c
===================================================================
--- 2.6-git.orig/drivers/ata/ahci.c 2007-03-21 01:25:24.000000000 -0700
+++ 2.6-git/drivers/ata/ahci.c 2007-03-21 01:25:43.000000000 -0700
@@ -1126,6 +1126,26 @@
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 u32 *f = pp->rx_fis + RX_FIS_SDB;
+
+ /* check the 'N' bit in word 0 of the FIS */
+ if (f[0] & (1 << 15)) {
+ int port_addr = ((f[0] & 0x00000f00) >> 8);
+ struct ata_device *adev = &ap->device[port_addr];
+ ata_port_printk(ap, KERN_INFO, "N bit set on SDB FIS!\n");
+ if (adev->flags & ATA_DFLAG_AN)
+ ata_async_notify(adev);
+ }
+ }
if (ap->sactive)
qc_active = readl(port_mmio + PORT_SCR_ACT);
else
Index: 2.6-git/include/linux/libata.h
===================================================================
--- 2.6-git.orig/include/linux/libata.h 2007-03-21 01:25:24.000000000 -0700
+++ 2.6-git/include/linux/libata.h 2007-03-21 01:25:43.000000000 -0700
@@ -504,6 +504,7 @@
/* error history */
struct ata_ering ering;
unsigned int horkage; /* List of broken features */
+ struct work_struct async_notify;
};
/* Offset into struct ata_device. Fields above it are maintained
@@ -827,6 +828,7 @@
extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
int queue_depth);
extern struct ata_device *ata_dev_pair(struct ata_device *adev);
+extern void ata_async_notify(struct ata_device *atadev);
/*
* Timing helpers
Index: 2.6-git/drivers/ata/libata-core.c
===================================================================
--- 2.6-git.orig/drivers/ata/libata-core.c 2007-03-21 01:25:24.000000000 -0700
+++ 2.6-git/drivers/ata/libata-core.c 2007-03-21 01:25:43.000000000 -0700
@@ -1589,6 +1589,26 @@
}
}
+static void async_notify_thread(struct work_struct *work)
+{
+ struct ata_device *atadev =
+ container_of(work, struct ata_device, async_notify);
+
+ /*
+ * TBD - who should send this event? I couldn't find an
+ * easy way to map an ata_device to a genhd device, so
+ * decided maybe the ata host should send the event and
+ * allow user space to figure out what happened?
+ */
+ kobject_uevent(&atadev->ap->host->dev->kobj, KOBJ_CHANGE);
+}
+
+void ata_async_notify(struct ata_device *atadev)
+{
+ schedule_work(&atadev->async_notify);
+}
+
+
/**
* ata_dev_configure - Configure the specified ATA/ATAPI device
* @dev: Target device to configure
@@ -1755,6 +1775,7 @@
goto err_out_nosup;
}
dev->flags |= ATA_DFLAG_AN;
+ INIT_WORK(&dev->async_notify, async_notify_thread);
}
if (ata_id_cdb_intr(dev->id)) {
@@ -6545,3 +6566,4 @@
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
EXPORT_SYMBOL_GPL(ata_do_eh);
+EXPORT_SYMBOL_GPL(ata_async_notify);
--
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. The ahci host controller will send the
event via KOBJ_CHANGE uevent.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
Index: 2.6-git/drivers/ata/ahci.c
===================================================================
--- 2.6-git.orig/drivers/ata/ahci.c 2007-03-21 01:25:24.000000000 -0700
+++ 2.6-git/drivers/ata/ahci.c 2007-03-21 01:25:43.000000000 -0700
@@ -1126,6 +1126,26 @@
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 u32 *f = pp->rx_fis + RX_FIS_SDB;
+
+ /* check the 'N' bit in word 0 of the FIS */
+ if (f[0] & (1 << 15)) {
+ int port_addr = ((f[0] & 0x00000f00) >> 8);
+ struct ata_device *adev = &ap->device[port_addr];
+ ata_port_printk(ap, KERN_INFO, "N bit set on SDB FIS!\n");
+ if (adev->flags & ATA_DFLAG_AN)
+ ata_async_notify(adev);
+ }
+ }
if (ap->sactive)
qc_active = readl(port_mmio + PORT_SCR_ACT);
else
Index: 2.6-git/include/linux/libata.h
===================================================================
--- 2.6-git.orig/include/linux/libata.h 2007-03-21 01:25:24.000000000 -0700
+++ 2.6-git/include/linux/libata.h 2007-03-21 01:25:43.000000000 -0700
@@ -504,6 +504,7 @@
/* error history */
struct ata_ering ering;
unsigned int horkage; /* List of broken features */
+ struct work_struct async_notify;
};
/* Offset into struct ata_device. Fields above it are maintained
@@ -827,6 +828,7 @@
extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
int queue_depth);
extern struct ata_device *ata_dev_pair(struct ata_device *adev);
+extern void ata_async_notify(struct ata_device *atadev);
/*
* Timing helpers
Index: 2.6-git/drivers/ata/libata-core.c
===================================================================
--- 2.6-git.orig/drivers/ata/libata-core.c 2007-03-21 01:25:24.000000000 -0700
+++ 2.6-git/drivers/ata/libata-core.c 2007-03-21 01:25:43.000000000 -0700
@@ -1589,6 +1589,26 @@
}
}
+static void async_notify_thread(struct work_struct *work)
+{
+ struct ata_device *atadev =
+ container_of(work, struct ata_device, async_notify);
+
+ /*
+ * TBD - who should send this event? I couldn't find an
+ * easy way to map an ata_device to a genhd device, so
+ * decided maybe the ata host should send the event and
+ * allow user space to figure out what happened?
+ */
+ kobject_uevent(&atadev->ap->host->dev->kobj, KOBJ_CHANGE);
+}
+
+void ata_async_notify(struct ata_device *atadev)
+{
+ schedule_work(&atadev->async_notify);
+}
+
+
/**
* ata_dev_configure - Configure the specified ATA/ATAPI device
* @dev: Target device to configure
@@ -1755,6 +1775,7 @@
goto err_out_nosup;
}
dev->flags |= ATA_DFLAG_AN;
+ INIT_WORK(&dev->async_notify, async_notify_thread);
}
if (ata_id_cdb_intr(dev->id)) {
@@ -6545,3 +6566,4 @@
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
EXPORT_SYMBOL_GPL(ata_do_eh);
+EXPORT_SYMBOL_GPL(ata_async_notify);
--
