[SCSI] aacraid: use no_uld_attach flag

Received From Mark Salyzyn.

In order to support user tools accessing the array components (SMART,
Mode Page information, Cache page adjustments, WWN determination,
Firmware updates etc), we take advantage of the no_uld_attach flag and
deprecate the code that filters Inquiries to block the requests to array
components. The quirk prevents the sd layer from attaching to the
components.

We also took the opportunity to balance the queue depths based on the
total adapter queue depth to the array devices to reduce the chances of
starvation.

Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 33 insertions, 9 deletions

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 9defee03b823..271617890562 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -385,21 +385,45 @@ static int aac_biosparm(struct scsi_device *sdev, struct block_device *bdev,
 
 static int aac_slave_configure(struct scsi_device *sdev)
 {
-        struct Scsi_Host *host = sdev->host;
         if (sdev_channel(sdev) == CONTAINER_CHANNEL) {
                 sdev->skip_ms_page_8 = 1;
                 sdev->skip_ms_page_3f = 1;
         }
+        if ((sdev->type == TYPE_DISK) &&
+                        (sdev_channel(sdev) != CONTAINER_CHANNEL)) {
+                struct aac_dev *aac = (struct aac_dev *)sdev->host->hostdata;
+                if (!aac->raid_scsi_mode || (sdev_channel(sdev) != 2))
+                        sdev->no_uld_attach = 1;
+        }
+        if (sdev->tagged_supported && (sdev->type == TYPE_DISK) &&
+                        (sdev_channel(sdev) == CONTAINER_CHANNEL)) {
+                struct scsi_device * dev;
+                struct Scsi_Host *host = sdev->host;
+                unsigned num_lsu = 0;
+                unsigned num_one = 0;
+                unsigned depth;
 
-        if (sdev->tagged_supported)
-                scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, 128);
-        else
+                __shost_for_each_device(dev, host) {
+                        if (dev->tagged_supported && (dev->type == TYPE_DISK) &&
+                                (sdev_channel(dev) == CONTAINER_CHANNEL))
+                                ++num_lsu;
+                        else
+                                ++num_one;
+                }
+                if (num_lsu == 0)
+                        ++num_lsu;
+                depth = (host->can_queue - num_one) / num_lsu;
+                if (depth > 256)
+                        depth = 256;
+                else if (depth < 2)
+                        depth = 2;
+                scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth);
+                if (!(((struct aac_dev *)host->hostdata)->adapter_info.options &
+                                AAC_OPT_NEW_COMM))
+                        blk_queue_max_segment_size(sdev->request_queue, 65536);
+        } else
                 scsi_adjust_queue_depth(sdev, 0, 1);
 
-        if (!(((struct aac_dev *)host->hostdata)->adapter_info.options
-          & AAC_OPT_NEW_COMM))
-                blk_queue_max_segment_size(sdev->request_queue, 65536);
-
         return 0;
 }
 
@@ -874,7 +898,7 @@ static int __devinit aac_probe_one(struct pci_dev *pdev,
  
         /*
          * max channel will be the physical channels plus 1 virtual channel
-         * all containers are on the virtual channel 0
+         * all containers are on the virtual channel 0 (CONTAINER_CHANNEL)
          * physical channels are address by their actual physical number+1
          */
         if (aac->nondasd_support == 1)