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authorJames Smart <james.smart@emulex.com>2010-07-14 15:32:10 -0400
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:05:41 -0500
commit7dc517df3ace15b5a29b331abe0af86ed4836236 (patch)
tree7f95a4b9833b1549078244c28d4ddcde56d847ed /drivers/scsi/lpfc/lpfc_attr.c
parent3804dc84b8c11038ef75d97fd11e43658f623665 (diff)
[SCSI] lpfc 8.3.15: Add target queue depth throttling
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com> Signed-off-by: James Smart <james.smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_attr.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_attr.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index a7c6b739055..868874c28f9 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -2208,6 +2208,13 @@ LPFC_VPORT_ATTR_R(lun_queue_depth, 30, 1, 128,
"Max number of FCP commands we can queue to a specific LUN");
/*
+# tgt_queue_depth: This parameter is used to limit the number of outstanding
+# commands per target port. Value range is [10,65535]. Default value is 65535.
+*/
+LPFC_VPORT_ATTR_R(tgt_queue_depth, 65535, 10, 65535,
+ "Max number of FCP commands we can queue to a specific target port");
+
+/*
# hba_queue_depth: This parameter is used to limit the number of outstanding
# commands per lpfc HBA. Value range is [32,8192]. If this parameter
# value is greater than the maximum number of exchanges supported by the HBA,
@@ -3122,7 +3129,7 @@ lpfc_max_scsicmpl_time_set(struct lpfc_vport *vport, int val)
continue;
if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
continue;
- ndlp->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
+ ndlp->cmd_qdepth = vport->cfg_tgt_queue_depth;
}
spin_unlock_irq(shost->host_lock);
return 0;
@@ -3326,6 +3333,7 @@ struct device_attribute *lpfc_hba_attrs[] = {
&dev_attr_lpfc_temp_sensor,
&dev_attr_lpfc_log_verbose,
&dev_attr_lpfc_lun_queue_depth,
+ &dev_attr_lpfc_tgt_queue_depth,
&dev_attr_lpfc_hba_queue_depth,
&dev_attr_lpfc_peer_port_login,
&dev_attr_lpfc_nodev_tmo,
@@ -3387,6 +3395,7 @@ struct device_attribute *lpfc_vport_attrs[] = {
&dev_attr_lpfc_drvr_version,
&dev_attr_lpfc_log_verbose,
&dev_attr_lpfc_lun_queue_depth,
+ &dev_attr_lpfc_tgt_queue_depth,
&dev_attr_lpfc_nodev_tmo,
&dev_attr_lpfc_devloss_tmo,
&dev_attr_lpfc_hba_queue_depth,
@@ -4575,6 +4584,7 @@ lpfc_get_vport_cfgparam(struct lpfc_vport *vport)
{
lpfc_log_verbose_init(vport, lpfc_log_verbose);
lpfc_lun_queue_depth_init(vport, lpfc_lun_queue_depth);
+ lpfc_tgt_queue_depth_init(vport, lpfc_tgt_queue_depth);
lpfc_devloss_tmo_init(vport, lpfc_devloss_tmo);
lpfc_nodev_tmo_init(vport, lpfc_nodev_tmo);
lpfc_peer_port_login_init(vport, lpfc_peer_port_login);