[PATCH 6/8] imsm: define RAID_10 attribute

[Mateusz Kusiak <mateusz.kusiak@intel.com>]

Add MPB_ATTRIB_RAID10_EXT attribute to support RAID 10
with more than 4 drives.

Allow more than 4 drives in imsm_orom_support_raid_disks_raid10().

This is one of last patches for introducing R10D4+ to imsm.
Only small adjustments in reshape behaviours are needed.

Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
---
 platform-intel.c | 3 ++-
 super-intel.c    | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/platform-intel.c b/platform-intel.c
index 40e8fb82da30..15a9fa5ac160 100644
--- a/platform-intel.c
+++ b/platform-intel.c
@@ -76,7 +76,8 @@ static bool imsm_orom_support_raid_disks_count_raid5(const int raid_disks)
 
 static bool imsm_orom_support_raid_disks_count_raid10(const int raid_disks)
 {
-	if (raid_disks == 4)
+	/* raid_disks count must be higher than 4 and even */
+	if (raid_disks >= 4 && (raid_disks & 1) == 0)
 		return true;
 	return false;
 }
diff --git a/super-intel.c b/super-intel.c
index 4b168add4346..2d30931672cd 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -62,6 +62,8 @@
 #define MPB_ATTRIB_RAIDCNG		__cpu_to_le32(0x00000020)
 /* supports expanded stripe sizes of  256K, 512K and 1MB */
 #define MPB_ATTRIB_EXP_STRIPE_SIZE	__cpu_to_le32(0x00000040)
+/* supports RAID10 with more than 4 drives */
+#define MPB_ATTRIB_RAID10_EXT		__cpu_to_le32(0x00000080)
 
 /* The OROM Support RST Caching of Volumes */
 #define MPB_ATTRIB_NVM			__cpu_to_le32(0x02000000)
@@ -89,6 +91,7 @@
 					MPB_ATTRIB_RAID10          | \
 					MPB_ATTRIB_RAID5           | \
 					MPB_ATTRIB_EXP_STRIPE_SIZE | \
+					MPB_ATTRIB_RAID10_EXT      | \
 					MPB_ATTRIB_BBM)
 
 /* Define attributes that are unused but not harmful */
@@ -5552,6 +5555,8 @@ static void imsm_update_version_info(struct intel_super *super)
 			break;
 		case IMSM_T_RAID10:
 			mpb->attributes |= MPB_ATTRIB_RAID10;
+			if (map->num_members > 4)
+				mpb->attributes |= MPB_ATTRIB_RAID10_EXT;
 			break;
 		}
 	}
-- 
2.39.2