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[SCSI] libsas: Allow expander T-T attachments

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Allow expander table-to-table attachments for
expanders that support it.

Signed-off-by: Luben Tuikov <ltuikov@yahoo.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Luben Tuikov 2011-09-22 09:41:36 -07:00 committed by James Bottomley
parent 41e9a69641
commit ffaac8f45b
3 changed files with 29 additions and 8 deletions
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20
drivers/scsi/libsas/sas_expander.c
View File

@ -329,6 +329,7 @@ static void ex_assign_report_general(struct domain_device *dev,
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_bug(struct domain_device *child,
};
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 +1241,15 @@ static int sas_check_parent_topology(struct domain_device *child)
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:

3
include/scsi/libsas.h
View File

@ -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;

14
include/scsi/sas.h
View File

@ -349,7 +349,12 @@ 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_cont_awt:1;
u8 self_config:1;
u8 zone_config:1;
u8 t2t_supp:1;
u8 _r_c;
@ -536,7 +541,12 @@ 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_cont_awt:1;
u8 orej_retry_supp:1;
u8 config_others:1;
u8 configuring:1;
u8 conf_route_table:1;