[SCSI] mpt fusion: RAID device handling and Dual port Raid support is added

1. Handle integrated Raid device(Add/Delete) and error condition and check
   related to Raid device. is_logical_volume will represent logical volume
   device.
2. Raid device dual port support is added. Main functions to support this
   feature are mpt_raid_phys_disk_get_num_paths and mpt_raid_phys_disk_pg1.
Signed-off-by: Kashyap Desai <kadesai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/message/fusion/mptbase.c

@@ -5762,6 +5762,161 @@ mpt_raid_phys_disk_pg0(MPT_ADAPTER *ioc, u8 phys_disk_num,
 	return rc;
 }
 
+/**
+ *	mpt_raid_phys_disk_get_num_paths - returns number paths associated to this phys_num
+ *	@ioc: Pointer to a Adapter Structure
+ *	@phys_disk_num: io unit unique phys disk num generated by the ioc
+ *
+ *	Return:
+ *	returns number paths
+ **/
+int
+mpt_raid_phys_disk_get_num_paths(MPT_ADAPTER *ioc, u8 phys_disk_num)
+{
+	CONFIGPARMS		 	cfg;
+	ConfigPageHeader_t	 	hdr;
+	dma_addr_t			dma_handle;
+	pRaidPhysDiskPage1_t		buffer = NULL;
+	int				rc;
+
+	memset(&cfg, 0 , sizeof(CONFIGPARMS));
+	memset(&hdr, 0 , sizeof(ConfigPageHeader_t));
+
+	hdr.PageVersion = MPI_RAIDPHYSDISKPAGE1_PAGEVERSION;
+	hdr.PageType = MPI_CONFIG_PAGETYPE_RAID_PHYSDISK;
+	hdr.PageNumber = 1;
+	cfg.cfghdr.hdr = &hdr;
+	cfg.physAddr = -1;
+	cfg.action = MPI_CONFIG_ACTION_PAGE_HEADER;
+
+	if (mpt_config(ioc, &cfg) != 0) {
+		rc = 0;
+		goto out;
+	}
+
+	if (!hdr.PageLength) {
+		rc = 0;
+		goto out;
+	}
+
+	buffer = pci_alloc_consistent(ioc->pcidev, hdr.PageLength * 4,
+	    &dma_handle);
+
+	if (!buffer) {
+		rc = 0;
+		goto out;
+	}
+
+	cfg.physAddr = dma_handle;
+	cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
+	cfg.pageAddr = phys_disk_num;
+
+	if (mpt_config(ioc, &cfg) != 0) {
+		rc = 0;
+		goto out;
+	}
+
+	rc = buffer->NumPhysDiskPaths;
+ out:
+
+	if (buffer)
+		pci_free_consistent(ioc->pcidev, hdr.PageLength * 4, buffer,
+		    dma_handle);
+
+	return rc;
+}
+EXPORT_SYMBOL(mpt_raid_phys_disk_get_num_paths);
+
+/**
+ *	mpt_raid_phys_disk_pg1 - returns phys disk page 1
+ *	@ioc: Pointer to a Adapter Structure
+ *	@phys_disk_num: io unit unique phys disk num generated by the ioc
+ *	@phys_disk: requested payload data returned
+ *
+ *	Return:
+ *	0 on success
+ *	-EFAULT if read of config page header fails or data pointer not NULL
+ *	-ENOMEM if pci_alloc failed
+ **/
+int
+mpt_raid_phys_disk_pg1(MPT_ADAPTER *ioc, u8 phys_disk_num,
+		RaidPhysDiskPage1_t *phys_disk)
+{
+	CONFIGPARMS		 	cfg;
+	ConfigPageHeader_t	 	hdr;
+	dma_addr_t			dma_handle;
+	pRaidPhysDiskPage1_t		buffer = NULL;
+	int				rc;
+	int				i;
+	__le64				sas_address;
+
+	memset(&cfg, 0 , sizeof(CONFIGPARMS));
+	memset(&hdr, 0 , sizeof(ConfigPageHeader_t));
+	rc = 0;
+
+	hdr.PageVersion = MPI_RAIDPHYSDISKPAGE1_PAGEVERSION;
+	hdr.PageType = MPI_CONFIG_PAGETYPE_RAID_PHYSDISK;
+	hdr.PageNumber = 1;
+	cfg.cfghdr.hdr = &hdr;
+	cfg.physAddr = -1;
+	cfg.action = MPI_CONFIG_ACTION_PAGE_HEADER;
+
+	if (mpt_config(ioc, &cfg) != 0) {
+		rc = -EFAULT;
+		goto out;
+	}
+
+	if (!hdr.PageLength) {
+		rc = -EFAULT;
+		goto out;
+	}
+
+	buffer = pci_alloc_consistent(ioc->pcidev, hdr.PageLength * 4,
+	    &dma_handle);
+
+	if (!buffer) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	cfg.physAddr = dma_handle;
+	cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
+	cfg.pageAddr = phys_disk_num;
+
+	if (mpt_config(ioc, &cfg) != 0) {
+		rc = -EFAULT;
+		goto out;
+	}
+
+	phys_disk->NumPhysDiskPaths = buffer->NumPhysDiskPaths;
+	phys_disk->PhysDiskNum = phys_disk_num;
+	for (i = 0; i < phys_disk->NumPhysDiskPaths; i++) {
+		phys_disk->Path[i].PhysDiskID = buffer->Path[i].PhysDiskID;
+		phys_disk->Path[i].PhysDiskBus = buffer->Path[i].PhysDiskBus;
+		phys_disk->Path[i].OwnerIdentifier =
+				buffer->Path[i].OwnerIdentifier;
+		phys_disk->Path[i].Flags = le16_to_cpu(buffer->Path[i].Flags);
+		memcpy(&sas_address, &buffer->Path[i].WWID, sizeof(__le64));
+		sas_address = le64_to_cpu(sas_address);
+		memcpy(&phys_disk->Path[i].WWID, &sas_address, sizeof(__le64));
+		memcpy(&sas_address,
+				&buffer->Path[i].OwnerWWID, sizeof(__le64));
+		sas_address = le64_to_cpu(sas_address);
+		memcpy(&phys_disk->Path[i].OwnerWWID,
+				&sas_address, sizeof(__le64));
+	}
+
+ out:
+
+	if (buffer)
+		pci_free_consistent(ioc->pcidev, hdr.PageLength * 4, buffer,
+		    dma_handle);
+
+	return rc;
+}
+EXPORT_SYMBOL(mpt_raid_phys_disk_pg1);
+
+
 /**
  *	mpt_findImVolumes - Identify IDs of hidden disks and RAID Volumes
  *	@ioc: Pointer to a Adapter Strucutre
@@ -7170,6 +7325,18 @@ mpt_display_event_info(MPT_ADAPTER *ioc, EventNotificationReply_t *pEventReply)
 			    "id=%d channel=%d phys_num=%d",
 			    id, channel, phys_num);
 			break;
+		case MPI_EVENT_IR2_RC_DUAL_PORT_ADDED:
+			snprintf(evStr, EVENT_DESCR_STR_SZ,
+			    "IR2: Dual Port Added: "
+			    "id=%d channel=%d phys_num=%d",
+			    id, channel, phys_num);
+			break;
+		case MPI_EVENT_IR2_RC_DUAL_PORT_REMOVED:
+			snprintf(evStr, EVENT_DESCR_STR_SZ,
+			    "IR2: Dual Port Removed: "
+			    "id=%d channel=%d phys_num=%d",
+			    id, channel, phys_num);
+			break;
 		default:
 			ds = "IR2";
 		break;

drivers/message/fusion/mptbase.h

@@ -958,6 +958,10 @@ extern void	 mpt_free_fw_memory(MPT_ADAPTER *ioc);
 extern int	 mpt_findImVolumes(MPT_ADAPTER *ioc);
 extern int	 mptbase_sas_persist_operation(MPT_ADAPTER *ioc, u8 persist_opcode);
 extern int	 mpt_raid_phys_disk_pg0(MPT_ADAPTER *ioc, u8 phys_disk_num, pRaidPhysDiskPage0_t phys_disk);
+extern int	mpt_raid_phys_disk_pg1(MPT_ADAPTER *ioc, u8 phys_disk_num,
+		pRaidPhysDiskPage1_t phys_disk);
+extern int	mpt_raid_phys_disk_get_num_paths(MPT_ADAPTER *ioc,
+		u8 phys_disk_num);
 extern int	 mpt_set_taskmgmt_in_progress_flag(MPT_ADAPTER *ioc);
 extern void	 mpt_clear_taskmgmt_in_progress_flag(MPT_ADAPTER *ioc);
 extern void     mpt_halt_firmware(MPT_ADAPTER *ioc);

drivers/message/fusion/mptsas.h

@@ -82,6 +82,7 @@ struct mptsas_device_info {
 	u32			device_info; /* specific bits for devices */
 	u16			slot;		/* enclosure slot id */
 	u64			enclosure_logical_id; /*enclosure address */
+	u8			is_logical_volume; /* is this logical volume */
 };
 
 struct mptsas_hotplug_event {

drivers/message/fusion/mptscsih.c

@@ -2087,8 +2087,10 @@ int
 mptscsih_is_phys_disk(MPT_ADAPTER *ioc, u8 channel, u8 id)
 {
 	struct inactive_raid_component_info *component_info;
-	int i;
+	int i, j;
+	RaidPhysDiskPage1_t *phys_disk;
 	int rc = 0;
+	int num_paths;
 
 	if (!ioc->raid_data.pIocPg3)
 		goto out;
@@ -2100,6 +2102,45 @@ mptscsih_is_phys_disk(MPT_ADAPTER *ioc, u8 channel, u8 id)
 		}
 	}
 
+	if (ioc->bus_type != SAS)
+		goto out;
+
+	/*
+	 * Check if dual path
+	 */
+	for (i = 0; i < ioc->raid_data.pIocPg3->NumPhysDisks; i++) {
+		num_paths = mpt_raid_phys_disk_get_num_paths(ioc,
+		    ioc->raid_data.pIocPg3->PhysDisk[i].PhysDiskNum);
+		if (num_paths < 2)
+			continue;
+		phys_disk = kzalloc(offsetof(RaidPhysDiskPage1_t, Path) +
+		   (num_paths * sizeof(RAID_PHYS_DISK1_PATH)), GFP_KERNEL);
+		if (!phys_disk)
+			continue;
+		if ((mpt_raid_phys_disk_pg1(ioc,
+		    ioc->raid_data.pIocPg3->PhysDisk[i].PhysDiskNum,
+		    phys_disk))) {
+			kfree(phys_disk);
+			continue;
+		}
+		for (j = 0; j < num_paths; j++) {
+			if ((phys_disk->Path[j].Flags &
+			    MPI_RAID_PHYSDISK1_FLAG_INVALID))
+				continue;
+			if ((phys_disk->Path[j].Flags &
+			    MPI_RAID_PHYSDISK1_FLAG_BROKEN))
+				continue;
+			if ((id == phys_disk->Path[j].PhysDiskID) &&
+			    (channel == phys_disk->Path[j].PhysDiskBus)) {
+				rc = 1;
+				kfree(phys_disk);
+				goto out;
+			}
+		}
+		kfree(phys_disk);
+	}
+
+
 	/*
 	 * Check inactive list for matching phys disks
 	 */
@@ -2124,8 +2165,10 @@ u8
 mptscsih_raid_id_to_num(MPT_ADAPTER *ioc, u8 channel, u8 id)
 {
 	struct inactive_raid_component_info *component_info;
-	int i;
+	int i, j;
+	RaidPhysDiskPage1_t *phys_disk;
 	int rc = -ENXIO;
+	int num_paths;
 
 	if (!ioc->raid_data.pIocPg3)
 		goto out;
@@ -2137,6 +2180,44 @@ mptscsih_raid_id_to_num(MPT_ADAPTER *ioc, u8 channel, u8 id)
 		}
 	}
 
+	if (ioc->bus_type != SAS)
+		goto out;
+
+	/*
+	 * Check if dual path
+	 */
+	for (i = 0; i < ioc->raid_data.pIocPg3->NumPhysDisks; i++) {
+		num_paths = mpt_raid_phys_disk_get_num_paths(ioc,
+		    ioc->raid_data.pIocPg3->PhysDisk[i].PhysDiskNum);
+		if (num_paths < 2)
+			continue;
+		phys_disk = kzalloc(offsetof(RaidPhysDiskPage1_t, Path) +
+		   (num_paths * sizeof(RAID_PHYS_DISK1_PATH)), GFP_KERNEL);
+		if (!phys_disk)
+			continue;
+		if ((mpt_raid_phys_disk_pg1(ioc,
+		    ioc->raid_data.pIocPg3->PhysDisk[i].PhysDiskNum,
+		    phys_disk))) {
+			kfree(phys_disk);
+			continue;
+		}
+		for (j = 0; j < num_paths; j++) {
+			if ((phys_disk->Path[j].Flags &
+			    MPI_RAID_PHYSDISK1_FLAG_INVALID))
+				continue;
+			if ((phys_disk->Path[j].Flags &
+			    MPI_RAID_PHYSDISK1_FLAG_BROKEN))
+				continue;
+			if ((id == phys_disk->Path[j].PhysDiskID) &&
+			    (channel == phys_disk->Path[j].PhysDiskBus)) {
+				rc = phys_disk->PhysDiskNum;
+				kfree(phys_disk);
+				goto out;
+			}
+		}
+		kfree(phys_disk);
+	}
+
 	/*
 	 * Check inactive list for matching phys disks
 	 */