[SCSI] lpfc 8.2.4 : Add parameters to enable and disable heartbeat and hba resets

Add parameters to enable and disable heartbeat and hba resets

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index e1b041d8f6d5..68e92be1ef5b 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -342,6 +342,9 @@ lpfc_selective_reset(struct lpfc_hba *phba)
         struct completion online_compl;
         int status = 0;
 
+        if (!phba->cfg_enable_hba_reset)
+                return -EIO;
+
         status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);
 
         if (status != 0)
@@ -415,6 +418,8 @@ lpfc_board_mode_store(struct class_device *cdev, const char *buf, size_t count)
         struct completion online_compl;
         int status=0;
 
+        if (!phba->cfg_enable_hba_reset)
+                return -EACCES;
         init_completion(&online_compl);
 
         if(strncmp(buf, "online", sizeof("online") - 1) == 0) {
@@ -979,6 +984,8 @@ lpfc_soft_wwpn_store(struct class_device *cdev, const char *buf, size_t count)
         unsigned int i, j, cnt=count;
         u8 wwpn[8];
 
+        if (!phba->cfg_enable_hba_reset)
+                return -EACCES;
         spin_lock_irq(&phba->hbalock);
         if (phba->over_temp_state == HBA_OVER_TEMP) {
                 spin_unlock_irq(&phba->hbalock);
@@ -1506,7 +1513,21 @@ LPFC_ATTR_RW(poll_tmo, 10, 1, 255,
 */
 LPFC_ATTR_R(use_msi, 0, 0, 1, "Use Message Signaled Interrupts, if possible");
 
+/*
+# lpfc_enable_hba_reset: Allow or prevent HBA resets to the hardware.
+#       0  = HBA resets disabled
+#       1  = HBA resets enabled (default)
+# Value range is [0,1]. Default value is 1.
+*/
+LPFC_ATTR_R(enable_hba_reset, 1, 0, 1, "Enable HBA resets from the driver.");
 
+/*
+# lpfc_enable_hba_heartbeat: Enable HBA heartbeat timer..
+#       0  = HBA Heartbeat disabled
+#       1  = HBA Heartbeat enabled (default)
+# Value range is [0,1]. Default value is 1.
+*/
+LPFC_ATTR_R(enable_hba_heartbeat, 1, 0, 1, "Enable HBA Heartbeat.");
 
 struct class_device_attribute *lpfc_hba_attrs[] = {
         &class_device_attr_info,
@@ -1558,6 +1579,8 @@ struct class_device_attribute *lpfc_hba_attrs[] = {
         &class_device_attr_lpfc_soft_wwnn,
         &class_device_attr_lpfc_soft_wwpn,
         &class_device_attr_lpfc_soft_wwn_enable,
+        &class_device_attr_lpfc_enable_hba_reset,
+        &class_device_attr_lpfc_enable_hba_heartbeat,
         NULL,
 };
 
@@ -2448,6 +2471,8 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
         lpfc_poll_tmo_init(phba, lpfc_poll_tmo);
         lpfc_enable_npiv_init(phba, lpfc_enable_npiv);
         lpfc_use_msi_init(phba, lpfc_use_msi);
+        lpfc_enable_hba_reset_init(phba, lpfc_enable_hba_reset);
+        lpfc_enable_hba_heartbeat_init(phba, lpfc_enable_hba_heartbeat);
         phba->cfg_poll = lpfc_poll;
         phba->cfg_soft_wwnn = 0L;
         phba->cfg_soft_wwpn = 0L;