libata-link: update hotplug to handle PMP links
Update hotplug to handle PMP links. When PMP is attached, the PMP
number corresponds to C of SCSI H:C:I:L. While at it, change argument
to ata_find_dev() to @devno from @id to avoid confusion with SCSI
device ID.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 3d6d5f7..58051ee 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2423,21 +2423,36 @@
return 0;
}
-static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
+static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
{
- if (likely(id < ata_link_max_devices(&ap->link)))
- return &ap->link.device[id];
+ if (ap->nr_pmp_links == 0) {
+ if (likely(devno < ata_link_max_devices(&ap->link)))
+ return &ap->link.device[devno];
+ } else {
+ if (likely(devno < ap->nr_pmp_links))
+ return &ap->pmp_link[devno].device[0];
+ }
+
return NULL;
}
static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
const struct scsi_device *scsidev)
{
- /* skip commands not addressed to targets we simulate */
- if (unlikely(scsidev->channel || scsidev->lun))
- return NULL;
+ int devno;
- return ata_find_dev(ap, scsidev->id);
+ /* skip commands not addressed to targets we simulate */
+ if (ap->nr_pmp_links == 0) {
+ if (unlikely(scsidev->channel || scsidev->lun))
+ return NULL;
+ devno = scsidev->id;
+ } else {
+ if (unlikely(scsidev->id || scsidev->lun))
+ return NULL;
+ devno = scsidev->channel;
+ }
+
+ return ata_find_dev(ap, devno);
}
/**
@@ -2951,22 +2966,32 @@
{
int tries = 5;
struct ata_device *last_failed_dev = NULL;
+ struct ata_link *link;
struct ata_device *dev;
if (ap->flags & ATA_FLAG_DISABLED)
return;
repeat:
- ata_link_for_each_dev(dev, &ap->link) {
- struct scsi_device *sdev;
+ ata_port_for_each_link(link, ap) {
+ ata_link_for_each_dev(dev, link) {
+ struct scsi_device *sdev;
+ int channel = 0, id = 0;
- if (!ata_dev_enabled(dev) || dev->sdev)
- continue;
+ if (!ata_dev_enabled(dev) || dev->sdev)
+ continue;
- sdev = __scsi_add_device(ap->scsi_host, 0, dev->devno, 0, NULL);
- if (!IS_ERR(sdev)) {
- dev->sdev = sdev;
- scsi_device_put(sdev);
+ if (ata_is_host_link(link))
+ id = dev->devno;
+ else
+ channel = link->pmp;
+
+ sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
+ NULL);
+ if (!IS_ERR(sdev)) {
+ dev->sdev = sdev;
+ scsi_device_put(sdev);
+ }
}
}
@@ -2974,11 +2999,14 @@
* failure occurred, scan would have failed silently. Check
* whether all devices are attached.
*/
- ata_link_for_each_dev(dev, &ap->link) {
- if (ata_dev_enabled(dev) && !dev->sdev)
- break;
+ ata_port_for_each_link(link, ap) {
+ ata_link_for_each_dev(dev, link) {
+ if (ata_dev_enabled(dev) && !dev->sdev)
+ goto exit_loop;
+ }
}
- if (!dev)
+ exit_loop:
+ if (!link)
return;
/* we're missing some SCSI devices */
@@ -3092,6 +3120,25 @@
}
}
+static void ata_scsi_handle_link_detach(struct ata_link *link)
+{
+ struct ata_port *ap = link->ap;
+ struct ata_device *dev;
+
+ ata_link_for_each_dev(dev, link) {
+ unsigned long flags;
+
+ if (!(dev->flags & ATA_DFLAG_DETACHED))
+ continue;
+
+ spin_lock_irqsave(ap->lock, flags);
+ dev->flags &= ~ATA_DFLAG_DETACHED;
+ spin_unlock_irqrestore(ap->lock, flags);
+
+ ata_scsi_remove_dev(dev);
+ }
+}
+
/**
* ata_scsi_hotplug - SCSI part of hotplug
* @work: Pointer to ATA port to perform SCSI hotplug on
@@ -3108,7 +3155,7 @@
{
struct ata_port *ap =
container_of(work, struct ata_port, hotplug_task.work);
- struct ata_device *dev;
+ int i;
if (ap->pflags & ATA_PFLAG_UNLOADING) {
DPRINTK("ENTER/EXIT - unloading\n");
@@ -3117,19 +3164,14 @@
DPRINTK("ENTER\n");
- /* unplug detached devices */
- ata_link_for_each_dev(dev, &ap->link) {
- unsigned long flags;
-
- if (!(dev->flags & ATA_DFLAG_DETACHED))
- continue;
-
- spin_lock_irqsave(ap->lock, flags);
- dev->flags &= ~ATA_DFLAG_DETACHED;
- spin_unlock_irqrestore(ap->lock, flags);
-
- ata_scsi_remove_dev(dev);
- }
+ /* Unplug detached devices. We cannot use link iterator here
+ * because PMP links have to be scanned even if PMP is
+ * currently not attached. Iterate manually.
+ */
+ ata_scsi_handle_link_detach(&ap->link);
+ if (ap->pmp_link)
+ for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
+ ata_scsi_handle_link_detach(&ap->pmp_link[i]);
/* scan for new ones */
ata_scsi_scan_host(ap, 0);
@@ -3157,26 +3199,40 @@
unsigned int id, unsigned int lun)
{
struct ata_port *ap = ata_shost_to_port(shost);
- struct ata_eh_info *ehi = &ap->link.eh_info;
unsigned long flags;
- int rc = 0;
+ int devno, rc = 0;
if (!ap->ops->error_handler)
return -EOPNOTSUPP;
- if ((channel != SCAN_WILD_CARD && channel != 0) ||
- (lun != SCAN_WILD_CARD && lun != 0))
+ if (lun != SCAN_WILD_CARD && lun)
return -EINVAL;
+ if (ap->nr_pmp_links == 0) {
+ if (channel != SCAN_WILD_CARD && channel)
+ return -EINVAL;
+ devno = id;
+ } else {
+ if (id != SCAN_WILD_CARD && id)
+ return -EINVAL;
+ devno = channel;
+ }
+
spin_lock_irqsave(ap->lock, flags);
- if (id == SCAN_WILD_CARD) {
- ehi->probe_mask |= (1 << ata_link_max_devices(&ap->link)) - 1;
- ehi->action |= ATA_EH_SOFTRESET;
+ if (devno == SCAN_WILD_CARD) {
+ struct ata_link *link;
+
+ ata_port_for_each_link(link, ap) {
+ struct ata_eh_info *ehi = &link->eh_info;
+ ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
+ ehi->action |= ATA_EH_SOFTRESET;
+ }
} else {
- struct ata_device *dev = ata_find_dev(ap, id);
+ struct ata_device *dev = ata_find_dev(ap, devno);
if (dev) {
+ struct ata_eh_info *ehi = &dev->link->eh_info;
ehi->probe_mask |= 1 << dev->devno;
ehi->action |= ATA_EH_SOFTRESET;
ehi->flags |= ATA_EHI_RESUME_LINK;
@@ -3210,23 +3266,26 @@
{
struct ata_port *ap =
container_of(work, struct ata_port, scsi_rescan_task);
+ struct ata_link *link;
struct ata_device *dev;
unsigned long flags;
spin_lock_irqsave(ap->lock, flags);
- ata_link_for_each_dev(dev, &ap->link) {
- struct scsi_device *sdev = dev->sdev;
+ ata_port_for_each_link(link, ap) {
+ ata_link_for_each_dev(dev, link) {
+ struct scsi_device *sdev = dev->sdev;
- if (!ata_dev_enabled(dev) || !sdev)
- continue;
- if (scsi_device_get(sdev))
- continue;
+ if (!ata_dev_enabled(dev) || !sdev)
+ continue;
+ if (scsi_device_get(sdev))
+ continue;
- spin_unlock_irqrestore(ap->lock, flags);
- scsi_rescan_device(&(sdev->sdev_gendev));
- scsi_device_put(sdev);
- spin_lock_irqsave(ap->lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
+ scsi_rescan_device(&(sdev->sdev_gendev));
+ scsi_device_put(sdev);
+ spin_lock_irqsave(ap->lock, flags);
+ }
}
spin_unlock_irqrestore(ap->lock, flags);
