From 522bc026f01381a91e65ed343781b1656f5e659a Mon Sep 17 00:00:00 2001
From: Dave Carroll <david.carroll@microsemi.com>
Date: Thu, 22 Aug 2019 15:39:11 -0500
Subject: [PATCH] scsi: smartpqi: add module param to hide vsep

Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Dave Carroll <david.carroll@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/smartpqi/smartpqi.h      |  1 +
 drivers/scsi/smartpqi/smartpqi_init.c | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h
index e8e768849c70..0a629f2f447a 100644
--- a/drivers/scsi/smartpqi/smartpqi.h
+++ b/drivers/scsi/smartpqi/smartpqi.h
@@ -822,6 +822,7 @@ union pqi_reset_register {
 #define PQI_HBA_BUS			2
 #define PQI_EXTERNAL_RAID_VOLUME_BUS	3
 #define PQI_MAX_BUS			PQI_EXTERNAL_RAID_VOLUME_BUS
+#define PQI_VSEP_CISS_BTL		379
 
 struct report_lun_header {
 	__be32	list_length;
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index fa6403b2741c..f289fbd4220d 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -151,6 +151,12 @@ module_param_named(expose_ld_first,
 MODULE_PARM_DESC(expose_ld_first,
 	"Expose logical drives before physical drives.");
 
+static int pqi_hide_vsep;
+module_param_named(hide_vsep,
+	pqi_hide_vsep, int, 0644);
+MODULE_PARM_DESC(hide_vsep,
+	"Hide the virtual SEP for direct attached drives.");
+
 static char *raid_levels[] = {
 	"RAID-0",
 	"RAID-4",
@@ -1951,6 +1957,11 @@ static inline bool pqi_skip_device(u8 *scsi3addr)
 	return false;
 }
 
+static inline void pqi_mask_device(u8 *scsi3addr)
+{
+	scsi3addr[3] |= 0xc0;
+}
+
 static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
 {
 	if (!device->is_physical_device)
@@ -2031,6 +2042,21 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
 			rc = -ENOMEM;
 			goto out;
 		}
+		if (pqi_hide_vsep) {
+			int i;
+
+			for (i = num_physicals - 1; i >= 0; i--) {
+				phys_lun_ext_entry =
+						&physdev_list->lun_entries[i];
+				if (CISS_GET_DRIVE_NUMBER(
+					phys_lun_ext_entry->lunid) ==
+						PQI_VSEP_CISS_BTL) {
+					pqi_mask_device(
+						phys_lun_ext_entry->lunid);
+					break;
+				}
+			}
+		}
 	}
 
 	num_new_devices = num_physicals + num_logicals;