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authorJames Smart <James.Smart@Emulex.Com>2006-12-02 13:34:56 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-12-03 09:31:04 -0600
commit4ff43246e45943200ae3233732adf8708c2faef6 (patch)
tree28204d5a11c4ca0de54c36a9e0bca9cfd3317f1c /drivers/scsi/lpfc/lpfc_attr.c
parentc7743956f8cb7b496c05d8444050eba908662a14 (diff)
[SCSI] lpfc 8.1.11 : Add MSI (Message Signalled Interrupts) support
Add MSI (Message Signalled Interrupts) support Actual use must be enabled via the new module parameter "lpfc_use_msi" Defaults to no use Many thanks to Frederic Temporelli who implemented the initial patch. Signed-off-by: Frederic Temporelli <frederic.temporelli@ext.bull.net> Signed-off-by: James Smart <James.Smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_attr.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_attr.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 73d3afc72de..e2ac7ba3d8a 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -961,6 +961,15 @@ LPFC_ATTR_R(max_luns, 255, 0, 65535,
LPFC_ATTR_RW(poll_tmo, 10, 1, 255,
"Milliseconds driver will wait between polling FCP ring");
+/*
+# lpfc_use_msi: Use MSI (Message Signaled Interrupts) in systems that
+# support this feature
+# 0 = MSI disabled (default)
+# 1 = MSI enabled
+# Value range is [0,1]. Default value is 0.
+*/
+LPFC_ATTR_R(use_msi, 0, 0, 1, "Use Message Signaled Interrupts, if possible");
+
struct class_device_attribute *lpfc_host_attrs[] = {
&class_device_attr_info,
@@ -999,6 +1008,7 @@ struct class_device_attribute *lpfc_host_attrs[] = {
&class_device_attr_issue_reset,
&class_device_attr_lpfc_poll,
&class_device_attr_lpfc_poll_tmo,
+ &class_device_attr_lpfc_use_msi,
&class_device_attr_lpfc_soft_wwpn,
&class_device_attr_lpfc_soft_wwpn_enable,
NULL,
@@ -1801,6 +1811,7 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
lpfc_discovery_threads_init(phba, lpfc_discovery_threads);
lpfc_max_luns_init(phba, lpfc_max_luns);
lpfc_poll_tmo_init(phba, lpfc_poll_tmo);
+ lpfc_use_msi_init(phba, lpfc_use_msi);
lpfc_devloss_tmo_init(phba, lpfc_devloss_tmo);
lpfc_nodev_tmo_init(phba, lpfc_nodev_tmo);
phba->cfg_poll = lpfc_poll;