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[SCSI] lpfc 8.1.11 : Add MSI (Message Signalled Interrupts) support

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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>
This commit is contained in:
James Smart
2006-12-02 13:34:56 -05:00
committed by James Bottomley
parent c7743956f8
commit 4ff43246e4
3 changed files with 22 additions and 0 deletions
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11
drivers/scsi/lpfc/lpfc_attr.c
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@@ -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;