RE: [PATCH] [SCSI] libsas: Allow expander T-T attachments

["Mark Salyzyn" <mark_salyzyn@us.xyratex.com>]

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Enclosed is an updated patch that passes checkpatch.pl (a few 80-character line errors in the original), maintain existing indent mechanics and contains my 'Ack' and the recommended Cc list.

Wait for Luben's Ack or Override (despite the fact I took the liberty of adding his Signed-off-by on the checkpatch required adjustments).

Sincerely -- Mark Salyzyn 

-----Original Message-----
From: linux-scsi-owner@vger.kernel.org [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of James Bottomley
Sent: Thursday, September 22, 2011 7:30 AM
To: Luben Tuikov
Cc: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH] [SCSI] libsas: Allow expander T-T attachments

On Wed, 2011-07-27 at 21:19 -0700, Luben Tuikov wrote:
> Allow expander table-to-table attachments for
> expanders that support it.
> 
> Signed-off-by: Luben Tuikov <ltuikov@yahoo.com>

OK, so now I need an applyable patch, please.  It looks like the mail
server has mapped all tabs to spaces.  If you can't fix the mailer, just
sending the patch as an attachment is fine.

James

NrybXǧv^)޺{.n+{"{ay\x1dʇڙ,j fhz\x1ew\fj:+vwjm zZ+ݢj"!

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[-- Attachment #2: libsas_t2t.patch --]
[-- Type: application/octet-stream, Size: 4154 bytes --]

Allow expander table-to-table attachments for expanders that support it. [LT]
Adjusted to pass checkpatch.pl. [MS]

Signed-off-by: Luben Tuikov <ltuikov@yahoo.com>
Cc: Darrick J Wong <djwong@us.ibm.com>
Cc: James Bottomley <jbottomley@parallels.com>
Cc: Xiangliang Yu <yuxiangl@marvell.com>
Cc: Jack Wang <jack_wang@usish.com>
Acked-by: Mark Salyzyn <mark_salyzyn@us.xyratex.com>

 drivers/scsi/libsas/sas_expander.c |   24 ++++++++++++++++++------
 include/scsi/libsas.h              |    3 +++
 include/scsi/sas.h                 |   14 ++++++++++++--
 3 files changed, 33 insertions(+), 8 deletions(-)

diff -rup scsi-misc-2.6/drivers/scsi/libsas/sas_expander.c scsi-misc-2.6.new/drivers/scsi/libsas/sas_expander.c
--- scsi-misc-2.6/drivers/scsi/libsas/sas_expander.c	2011-08-31 08:32:21.000000000 -0400
+++ scsi-misc-2.6.new/drivers/scsi/libsas/sas_expander.c	2011-09-22 10:49:08.000000000 -0400
@@ -329,6 +329,7 @@ static void ex_assign_report_general(str
 	dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
 	dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
 	dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
+	dev->ex_dev.t2t_supp = rg->t2t_supp;
 	dev->ex_dev.conf_route_table = rg->conf_route_table;
 	dev->ex_dev.configuring = rg->configuring;
 	memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
@@ -1133,15 +1134,17 @@ static void sas_print_parent_topology_bu
 	};
 	struct domain_device *parent = child->parent;
 
-	sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x "
-		   "has %c:%c routing link!\n",
+	sas_printk("%s ex %016llx (T2T supp:%d) phy 0x%x <--> %s ex %016llx "
+		   "(T2T supp:%d) phy 0x%x has %c:%c routing link!\n",
 
 		   ex_type[parent->dev_type],
 		   SAS_ADDR(parent->sas_addr),
+		   parent->ex_dev.t2t_supp,
 		   parent_phy->phy_id,
 
 		   ex_type[child->dev_type],
 		   SAS_ADDR(child->sas_addr),
+		   child->ex_dev.t2t_supp,
 		   child_phy->phy_id,
 
 		   ra_char[parent_phy->routing_attr],
@@ -1238,10 +1241,19 @@ static int sas_check_parent_topology(str
 					sas_print_parent_topology_bug(child, parent_phy, child_phy);
 					res = -ENODEV;
 				}
-			} else if (parent_phy->routing_attr == TABLE_ROUTING &&
-				   child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
-				sas_print_parent_topology_bug(child, parent_phy, child_phy);
-				res = -ENODEV;
+			} else if (parent_phy->routing_attr == TABLE_ROUTING) {
+				if (child_phy->routing_attr ==
+							SUBTRACTIVE_ROUTING ||
+				    (child_phy->routing_attr ==
+							TABLE_ROUTING &&
+				     child_ex->t2t_supp &&
+				     parent_ex->t2t_supp)) {
+					/* All good */;
+				} else {
+					sas_print_parent_topology_bug(child,
+						parent_phy, child_phy);
+					res = -ENODEV;
+				}
 			}
 			break;
 		case FANOUT_DEV:
diff -rup scsi-misc-2.6/include/scsi/libsas.h scsi-misc-2.6.new/include/scsi/libsas.h
--- scsi-misc-2.6/include/scsi/libsas.h	2011-08-31 08:32:22.000000000 -0400
+++ scsi-misc-2.6.new/include/scsi/libsas.h	2011-09-22 10:38:08.000000000 -0400
@@ -142,8 +142,11 @@ struct expander_device {
 	u16    ex_change_count;
 	u16    max_route_indexes;
 	u8     num_phys;
+
+	u8     t2t_supp:1;
 	u8     configuring:1;
 	u8     conf_route_table:1;
+
 	u8     enclosure_logical_id[8];
 
 	struct ex_phy *ex_phy;
diff -rup scsi-misc-2.6/include/scsi/sas.h scsi-misc-2.6.new/include/scsi/sas.h
--- scsi-misc-2.6/include/scsi/sas.h	2011-08-31 08:32:22.000000000 -0400
+++ scsi-misc-2.6.new/include/scsi/sas.h	2011-09-22 10:36:54.000000000 -0400
@@ -341,7 +341,12 @@ struct report_general_resp {
 
 	u8      conf_route_table:1;
 	u8      configuring:1;
-	u8      _r_b:6;
+	u8      config_others:1;
+	u8      orej_retry_supp:1;
+	u8      stp_count_awt:1;
+	u8      self_config:1;
+	u8      zone_config:1;
+	u8      t2t_supp:1;
 
 	u8      _r_c;
 
@@ -528,7 +533,12 @@ struct report_general_resp {
 	u8      _r_a;
 	u8      num_phys;
 
-	u8      _r_b:6;
+	u8      t2t_supp:1;
+	u8      zone_config:1;
+	u8      self_config:1;
+	u8      stp_count_awt:1;
+	u8      orej_retry_supp:1;
+	u8      config_others:1;
 	u8      configuring:1;
 	u8      conf_route_table:1;