[SCSI] fusion SAS support (mptsas driver) updates

Summary of Changes:
* splitting mpt_interrupt per Christophs suggestion
about a month ago
* rename ScsiCfgData to SpiCfgData structure,
then move all the raid related info into
new structure called RaidCfgData.  This is
done because SAS supports RAID, as well as SPI,
so the raid stuff should be seperate.
* incorrect timeout calculation for cntdn
inside WaitForDoorbellAck and WaitForDoortbellInt
* add support for interpreting SAS Log Info
* Increase Event Log Size from 0xA to 0x32
* Fix bug in mptsas/mptfc/mptspi - when controller
has Initiator Mode Disabled, and only running in
TargetMode, the mptctl would panic when loading.
The fix is to return 0, instead of -ENODEV, in
SCSI LLD respective probe routines
* Fix bug in mptlan.c - driver will panic if
there is host reset, due to dev being set to
zero in mpt_lan_ioc_reset
* Fix's for SPI - Echo Buffer
* Several fix's in mptscsih_io_done - FCP Response
info, RESIDUAL_MISMATCH, Data Underrun, etc.
* Cleanup Error Handling - EH handlers,
mptscsih_flush_cmds, and zeroing out ScsiLookup
from mptscsih_qcmd
* Cleanup asyn event handling from
mptscsih -> mptscsih_event_process.  Also
added support for SAS Persistent Table Full,
an asyn event

Signed-off-by: Eric Moore <Eric.Moore@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 282 insertions, 167 deletions

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 14d62d96ca4..790a2932ded 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -135,7 +135,6 @@ static void	mpt_adapter_dispose(MPT_ADAPTER *ioc);
 
 static void	MptDisplayIocCapabilities(MPT_ADAPTER *ioc);
 static int	MakeIocReady(MPT_ADAPTER *ioc, int force, int sleepFlag);
-//static u32	mpt_GetIocState(MPT_ADAPTER *ioc, int cooked);
 static int	GetIocFacts(MPT_ADAPTER *ioc, int sleepFlag, int reason);
 static int	GetPortFacts(MPT_ADAPTER *ioc, int portnum, int sleepFlag);
 static int	SendIocInit(MPT_ADAPTER *ioc, int sleepFlag);
@@ -178,6 +177,7 @@ static int	ProcessEventNotification(MPT_ADAPTER *ioc, EventNotificationReply_t *
 static void	mpt_sp_ioc_info(MPT_ADAPTER *ioc, u32 ioc_status, MPT_FRAME_HDR *mf);
 static void	mpt_fc_log_info(MPT_ADAPTER *ioc, u32 log_info);
 static void	mpt_sp_log_info(MPT_ADAPTER *ioc, u32 log_info);
+static void	mpt_sas_log_info(MPT_ADAPTER *ioc, u32 log_info);
 
 /* module entry point */
 static int  __init    fusion_init  (void);
@@ -209,6 +209,144 @@ pci_enable_io_access(struct pci_dev *pdev)
 	pci_write_config_word(pdev, PCI_COMMAND, command_reg);
 }
 
+/*
+ *  Process turbo (context) reply...
+ */
+static void
+mpt_turbo_reply(MPT_ADAPTER *ioc, u32 pa)
+{
+	MPT_FRAME_HDR *mf = NULL;
+	MPT_FRAME_HDR *mr = NULL;
+	int req_idx = 0;
+	int cb_idx;
+
+	dmfprintk((MYIOC_s_INFO_FMT "Got TURBO reply req_idx=%08x\n",
+				ioc->name, pa));
+
+	switch (pa >> MPI_CONTEXT_REPLY_TYPE_SHIFT) {
+	case MPI_CONTEXT_REPLY_TYPE_SCSI_INIT:
+		req_idx = pa & 0x0000FFFF;
+		cb_idx = (pa & 0x00FF0000) >> 16;
+		mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
+		break;
+	case MPI_CONTEXT_REPLY_TYPE_LAN:
+		cb_idx = mpt_lan_index;
+		/*
+		 *  Blind set of mf to NULL here was fatal
+		 *  after lan_reply says "freeme"
+		 *  Fix sort of combined with an optimization here;
+		 *  added explicit check for case where lan_reply
+		 *  was just returning 1 and doing nothing else.
+		 *  For this case skip the callback, but set up
+		 *  proper mf value first here:-)
+		 */
+		if ((pa & 0x58000000) == 0x58000000) {
+			req_idx = pa & 0x0000FFFF;
+			mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
+			mpt_free_msg_frame(ioc, mf);
+			mb();
+			return;
+			break;
+		}
+		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
+		break;
+	case MPI_CONTEXT_REPLY_TYPE_SCSI_TARGET:
+		cb_idx = mpt_stm_index;
+		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
+		break;
+	default:
+		cb_idx = 0;
+		BUG();
+	}
+
+	/*  Check for (valid) IO callback!  */
+	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
+			MptCallbacks[cb_idx] == NULL) {
+		printk(MYIOC_s_WARN_FMT "%s: Invalid cb_idx (%d)!\n",
+				__FUNCTION__, ioc->name, cb_idx);
+		goto out;
+	}
+
+	if (MptCallbacks[cb_idx](ioc, mf, mr))
+		mpt_free_msg_frame(ioc, mf);
+ out:
+	mb();
+}
+
+static void
+mpt_reply(MPT_ADAPTER *ioc, u32 pa)
+{
+	MPT_FRAME_HDR	*mf;
+	MPT_FRAME_HDR	*mr;
+	int		 req_idx;
+	int		 cb_idx;
+	int		 freeme;
+
+	u32 reply_dma_low;
+	u16 ioc_stat;
+
+	/* non-TURBO reply!  Hmmm, something may be up...
+	 *  Newest turbo reply mechanism; get address
+	 *  via left shift 1 (get rid of MPI_ADDRESS_REPLY_A_BIT)!
+	 */
+
+	/* Map DMA address of reply header to cpu address.
+	 * pa is 32 bits - but the dma address may be 32 or 64 bits
+	 * get offset based only only the low addresses
+	 */
+
+	reply_dma_low = (pa <<= 1);
+	mr = (MPT_FRAME_HDR *)((u8 *)ioc->reply_frames +
+			 (reply_dma_low - ioc->reply_frames_low_dma));
+
+	req_idx = le16_to_cpu(mr->u.frame.hwhdr.msgctxu.fld.req_idx);
+	cb_idx = mr->u.frame.hwhdr.msgctxu.fld.cb_idx;
+	mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
+
+	dmfprintk((MYIOC_s_INFO_FMT "Got non-TURBO reply=%p req_idx=%x cb_idx=%x Function=%x\n",
+			ioc->name, mr, req_idx, cb_idx, mr->u.hdr.Function));
+	DBG_DUMP_REPLY_FRAME(mr)
+
+	 /*  Check/log IOC log info
+	 */
+	ioc_stat = le16_to_cpu(mr->u.reply.IOCStatus);
+	if (ioc_stat & MPI_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE) {
+		u32	 log_info = le32_to_cpu(mr->u.reply.IOCLogInfo);
+		if (ioc->bus_type == FC)
+			mpt_fc_log_info(ioc, log_info);
+		else if (ioc->bus_type == SCSI)
+			mpt_sp_log_info(ioc, log_info);
+		else if (ioc->bus_type == SAS)
+			mpt_sas_log_info(ioc, log_info);
+	}
+	if (ioc_stat & MPI_IOCSTATUS_MASK) {
+		if (ioc->bus_type == SCSI &&
+		    cb_idx != mpt_stm_index &&
+		    cb_idx != mpt_lan_index)
+			mpt_sp_ioc_info(ioc, (u32)ioc_stat, mf);
+	}
+
+
+	/*  Check for (valid) IO callback!  */
+	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
+			MptCallbacks[cb_idx] == NULL) {
+		printk(MYIOC_s_WARN_FMT "%s: Invalid cb_idx (%d)!\n",
+				__FUNCTION__, ioc->name, cb_idx);
+		freeme = 0;
+		goto out;
+	}
+
+	freeme = MptCallbacks[cb_idx](ioc, mf, mr);
+
+ out:
+	/*  Flush (non-TURBO) reply with a WRITE!  */
+	CHIPREG_WRITE32(&ioc->chip->ReplyFifo, pa);
+
+	if (freeme)
+		mpt_free_msg_frame(ioc, mf);
+	mb();
+}
+
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /*
  *	mpt_interrupt - MPT adapter (IOC) specific interrupt handler.
@@ -230,164 +368,21 @@ pci_enable_io_access(struct pci_dev *pdev)
 static irqreturn_t
 mpt_interrupt(int irq, void *bus_id, struct pt_regs *r)
 {
-	MPT_ADAPTER	*ioc;
-	MPT_FRAME_HDR	*mf;
-	MPT_FRAME_HDR	*mr;
-	u32		 pa;
-	int		 req_idx;
-	int		 cb_idx;
-	int		 type;
-	int		 freeme;
-
-	ioc = (MPT_ADAPTER *)bus_id;
+	MPT_ADAPTER *ioc = bus_id;
+	u32 pa;
 
 	/*
 	 *  Drain the reply FIFO!
-	 *
-	 * NOTES: I've seen up to 10 replies processed in this loop, so far...
-	 * Update: I've seen up to 9182 replies processed in this loop! ??
-	 * Update: Limit ourselves to processing max of N replies
-	 *	(bottom of loop).
 	 */
 	while (1) {
-
-		if ((pa = CHIPREG_READ32_dmasync(&ioc->chip->ReplyFifo)) == 0xFFFFFFFF)
+		pa = CHIPREG_READ32_dmasync(&ioc->chip->ReplyFifo);
+		if (pa == 0xFFFFFFFF)
 			return IRQ_HANDLED;
-
-		cb_idx = 0;
-		freeme = 0;
-
-		/*
-		 *  Check for non-TURBO reply!
-		 */
-		if (pa & MPI_ADDRESS_REPLY_A_BIT) {
-			u32 reply_dma_low;
-			u16 ioc_stat;
-
-			/* non-TURBO reply!  Hmmm, something may be up...
-			 *  Newest turbo reply mechanism; get address
-			 *  via left shift 1 (get rid of MPI_ADDRESS_REPLY_A_BIT)!
-			 */
-
-			/* Map DMA address of reply header to cpu address.
-			 * pa is 32 bits - but the dma address may be 32 or 64 bits
-			 * get offset based only only the low addresses
-			 */
-			reply_dma_low = (pa = (pa << 1));
-			mr = (MPT_FRAME_HDR *)((u8 *)ioc->reply_frames +
-					 (reply_dma_low - ioc->reply_frames_low_dma));
-
-			req_idx = le16_to_cpu(mr->u.frame.hwhdr.msgctxu.fld.req_idx);
-			cb_idx = mr->u.frame.hwhdr.msgctxu.fld.cb_idx;
-			mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
-
-			dmfprintk((MYIOC_s_INFO_FMT "Got non-TURBO reply=%p req_idx=%x cb_idx=%x Function=%x\n",
-					ioc->name, mr, req_idx, cb_idx, mr->u.hdr.Function));
-			DBG_DUMP_REPLY_FRAME(mr)
-
-			 /*  Check/log IOC log info
-			 */
-			ioc_stat = le16_to_cpu(mr->u.reply.IOCStatus);
-			if (ioc_stat & MPI_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE) {
-				u32	 log_info = le32_to_cpu(mr->u.reply.IOCLogInfo);
-				if (ioc->bus_type == FC)
-					mpt_fc_log_info(ioc, log_info);
-				else if (ioc->bus_type == SCSI)
-					mpt_sp_log_info(ioc, log_info);
-			}
-			if (ioc_stat & MPI_IOCSTATUS_MASK) {
-				if (ioc->bus_type == SCSI)
-					mpt_sp_ioc_info(ioc, (u32)ioc_stat, mf);
-			}
-		} else {
-			/*
-			 *  Process turbo (context) reply...
-			 */
-			dmfprintk((MYIOC_s_INFO_FMT "Got TURBO reply req_idx=%08x\n", ioc->name, pa));
-			type = (pa >> MPI_CONTEXT_REPLY_TYPE_SHIFT);
-			if (type == MPI_CONTEXT_REPLY_TYPE_SCSI_TARGET) {
-				cb_idx = mpt_stm_index;
-				mf = NULL;
-				mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
-			} else if (type == MPI_CONTEXT_REPLY_TYPE_LAN) {
-				cb_idx = mpt_lan_index;
-				 /*  Blind set of mf to NULL here was fatal
-				 *  after lan_reply says "freeme"
-				 *  Fix sort of combined with an optimization here;
-				 *  added explicit check for case where lan_reply
-				 *  was just returning 1 and doing nothing else.
-				 *  For this case skip the callback, but set up
-				 *  proper mf value first here:-)
-				 */
-				if ((pa & 0x58000000) == 0x58000000) {
-					req_idx = pa & 0x0000FFFF;
-					mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
-					freeme = 1;
-					/*
-					 *  IMPORTANT!  Invalidate the callback!
-					 */
-					cb_idx = 0;
-				} else {
-					mf = NULL;
-				}
-				mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
-			} else {
-				req_idx = pa & 0x0000FFFF;
-				cb_idx = (pa & 0x00FF0000) >> 16;
-				mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
-				mr = NULL;
-			}
-			pa = 0;					/* No reply flush! */
-		}
-
-#ifdef MPT_DEBUG_IRQ
-		if (ioc->bus_type == SCSI) {
-			/* Verify mf, mr are reasonable.
-			 */
-			if ((mf) && ((mf >= MPT_INDEX_2_MFPTR(ioc, ioc->req_depth))
-				|| (mf < ioc->req_frames)) ) {
-				printk(MYIOC_s_WARN_FMT
-					"mpt_interrupt: Invalid mf (%p)!\n", ioc->name, (void *)mf);
-				cb_idx = 0;
-				pa = 0;
-				freeme = 0;
-			}
-			if ((pa) && (mr) && ((mr >= MPT_INDEX_2_RFPTR(ioc, ioc->req_depth))
-				|| (mr < ioc->reply_frames)) ) {
-				printk(MYIOC_s_WARN_FMT
-					"mpt_interrupt: Invalid rf (%p)!\n", ioc->name, (void *)mr);
-				cb_idx = 0;
-				pa = 0;
-				freeme = 0;
-			}
-			if (cb_idx > (MPT_MAX_PROTOCOL_DRIVERS-1)) {
-				printk(MYIOC_s_WARN_FMT
-					"mpt_interrupt: Invalid cb_idx (%d)!\n", ioc->name, cb_idx);
-				cb_idx = 0;
-				pa = 0;
-				freeme = 0;
-			}
-		}
-#endif
-
-		/*  Check for (valid) IO callback!  */
-		if (cb_idx) {
-			/*  Do the callback!  */
-			freeme = (*(MptCallbacks[cb_idx]))(ioc, mf, mr);
-		}
-
-		if (pa) {
-			/*  Flush (non-TURBO) reply with a WRITE!  */
-			CHIPREG_WRITE32(&ioc->chip->ReplyFifo, pa);
-		}
-
-		if (freeme) {
-			/*  Put Request back on FreeQ!  */
-			mpt_free_msg_frame(ioc, mf);
-		}
-
-		mb();
-	}	/* drain reply FIFO */
+		else if (pa & MPI_ADDRESS_REPLY_A_BIT)
+			mpt_reply(ioc, pa);
+		else
+			mpt_turbo_reply(ioc, pa);
+	}
 
 	return IRQ_HANDLED;
 }
@@ -1065,7 +1060,7 @@ mpt_host_page_alloc(MPT_ADAPTER *ioc, pIOCInit_t ioc_init)
 				    ioc->name,
 				    ioc->HostPageBuffer,
 				    ioc->HostPageBuffer_dma,
-				    hst_page_buffer_sz));
+				    host_page_buffer_sz));
 				ioc->alloc_total += host_page_buffer_sz;
 				ioc->HostPageBuffer_sz = host_page_buffer_sz;
 				break;
@@ -1208,7 +1203,7 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	/* Initilize SCSI Config Data structure
 	 */
-	memset(&ioc->spi_data, 0, sizeof(ScsiCfgData));
+	memset(&ioc->spi_data, 0, sizeof(SpiCfgData));
 
 	/* Initialize the running configQ head.
 	 */
@@ -1755,8 +1750,23 @@ mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag)
 			 */
 			if (ret == 0) {
 				rc = mpt_do_upload(ioc, sleepFlag);
-				if (rc != 0)
+				if (rc == 0) {
+					if (ioc->alt_ioc && ioc->alt_ioc->cached_fw) {
+						/*
+						 * Maintain only one pointer to FW memory
+						 * so there will not be two attempt to
+						 * downloadboot onboard dual function
+						 * chips (mpt_adapter_disable,
+						 * mpt_diag_reset)
+						 */
+						ioc->cached_fw = NULL;
+						ddlprintk((MYIOC_s_INFO_FMT ": mpt_upload:  alt_%s has cached_fw=%p \n",
+							ioc->name, ioc->alt_ioc->name, ioc->alt_ioc->cached_fw));
+					}
+				} else {
 					printk(KERN_WARNING MYNAM ": firmware upload failure!\n");
+					ret = -5;
+				}
 			}
 		}
 	}
@@ -1997,9 +2007,9 @@ mpt_adapter_disable(MPT_ADAPTER *ioc)
 	}
 
 	kfree(ioc->spi_data.nvram);
-	kfree(ioc->spi_data.pIocPg3);
+	kfree(ioc->raid_data.pIocPg3);
 	ioc->spi_data.nvram = NULL;
-	ioc->spi_data.pIocPg3 = NULL;
+	ioc->raid_data.pIocPg3 = NULL;
 
 	if (ioc->spi_data.pIocPg4 != NULL) {
 		sz = ioc->spi_data.IocPg4Sz;
@@ -3852,7 +3862,7 @@ WaitForDoorbellAck(MPT_ADAPTER *ioc, int howlong, int sleepFlag)
 	int count = 0;
 	u32 intstat=0;
 
-	cntdn = ((sleepFlag == CAN_SLEEP) ? HZ : 1000) * howlong;
+	cntdn = 1000 * howlong;
 
 	if (sleepFlag == CAN_SLEEP) {
 		while (--cntdn) {
@@ -3902,7 +3912,7 @@ WaitForDoorbellInt(MPT_ADAPTER *ioc, int howlong, int sleepFlag)
 	int count = 0;
 	u32 intstat=0;
 
-	cntdn = ((sleepFlag == CAN_SLEEP) ? HZ : 1000) * howlong;
+	cntdn = 1000 * howlong;
 	if (sleepFlag == CAN_SLEEP) {
 		while (--cntdn) {
 			intstat = CHIPREG_READ32(&ioc->chip->IntStatus);
@@ -4634,10 +4644,10 @@ mpt_findImVolumes(MPT_ADAPTER *ioc)
 	if (mpt_config(ioc, &cfg) != 0)
 		goto done_and_free;
 
-	if ( (mem = (u8 *)ioc->spi_data.pIocPg2) == NULL ) {
+	if ( (mem = (u8 *)ioc->raid_data.pIocPg2) == NULL ) {
 		mem = kmalloc(iocpage2sz, GFP_ATOMIC);
 		if (mem) {
-			ioc->spi_data.pIocPg2 = (IOCPage2_t *) mem;
+			ioc->raid_data.pIocPg2 = (IOCPage2_t *) mem;
 		} else {
 			goto done_and_free;
 		}
@@ -4654,7 +4664,7 @@ mpt_findImVolumes(MPT_ADAPTER *ioc)
 		/* At least 1 RAID Volume
 		 */
 		pIocRv = pIoc2->RaidVolume;
-		ioc->spi_data.isRaid = 0;
+		ioc->raid_data.isRaid = 0;
 		for (jj = 0; jj < nVols; jj++, pIocRv++) {
 			vid = pIocRv->VolumeID;
 			vbus = pIocRv->VolumeBus;
@@ -4663,7 +4673,7 @@ mpt_findImVolumes(MPT_ADAPTER *ioc)
 			/* find the match
 			 */
 			if (vbus == 0) {
-				ioc->spi_data.isRaid |= (1 << vid);
+				ioc->raid_data.isRaid |= (1 << vid);
 			} else {
 				/* Error! Always bus 0
 				 */
@@ -4698,8 +4708,8 @@ mpt_read_ioc_pg_3(MPT_ADAPTER *ioc)
 
 	/* Free the old page
 	 */
-	kfree(ioc->spi_data.pIocPg3);
-	ioc->spi_data.pIocPg3 = NULL;
+	kfree(ioc->raid_data.pIocPg3);
+	ioc->raid_data.pIocPg3 = NULL;
 
 	/* There is at least one physical disk.
 	 * Read and save IOC Page 3
@@ -4736,7 +4746,7 @@ mpt_read_ioc_pg_3(MPT_ADAPTER *ioc)
 		mem = kmalloc(iocpage3sz, GFP_ATOMIC);
 		if (mem) {
 			memcpy(mem, (u8 *)pIoc3, iocpage3sz);
-			ioc->spi_data.pIocPg3 = (IOCPage3_t *) mem;
+			ioc->raid_data.pIocPg3 = (IOCPage3_t *) mem;
 		}
 	}
 
@@ -6022,6 +6032,111 @@ mpt_sp_log_info(MPT_ADAPTER *ioc, u32 log_info)
 	printk(MYIOC_s_INFO_FMT "LogInfo(0x%08x): F/W: %s\n", ioc->name, log_info, desc);
 }
 
+/* strings for sas loginfo */
+	static char *originator_str[] = {
+		"IOP",						/* 00h */
+		"PL",						/* 01h */
+		"IR"						/* 02h */
+	};
+	static char *iop_code_str[] = {
+		NULL,						/* 00h */
+		"Invalid SAS Address",				/* 01h */
+		NULL,						/* 02h */
+		"Invalid Page",					/* 03h */
+		NULL,						/* 04h */
+		"Task Terminated"				/* 05h */
+	};
+	static char *pl_code_str[] = {
+		NULL,						/* 00h */
+		"Open Failure",					/* 01h */
+		"Invalid Scatter Gather List",			/* 02h */
+		"Wrong Relative Offset or Frame Length",	/* 03h */
+		"Frame Transfer Error",				/* 04h */
+		"Transmit Frame Connected Low",			/* 05h */
+		"SATA Non-NCQ RW Error Bit Set",		/* 06h */
+		"SATA Read Log Receive Data Error",		/* 07h */
+		"SATA NCQ Fail All Commands After Error",	/* 08h */
+		"SATA Error in Receive Set Device Bit FIS",	/* 09h */
+		"Receive Frame Invalid Message",		/* 0Ah */
+		"Receive Context Message Valid Error",		/* 0Bh */
+		"Receive Frame Current Frame Error",		/* 0Ch */
+		"SATA Link Down",				/* 0Dh */
+		"Discovery SATA Init W IOS",			/* 0Eh */
+		"Config Invalid Page",				/* 0Fh */
+		"Discovery SATA Init Timeout",			/* 10h */
+		"Reset",					/* 11h */
+		"Abort",					/* 12h */
+		"IO Not Yet Executed",				/* 13h */
+		"IO Executed",					/* 14h */
+		NULL,						/* 15h */
+		NULL,						/* 16h */
+		NULL,						/* 17h */
+		NULL,						/* 18h */
+		NULL,						/* 19h */
+		NULL,						/* 1Ah */
+		NULL,						/* 1Bh */
+		NULL,						/* 1Ch */
+		NULL,						/* 1Dh */
+		NULL,						/* 1Eh */
+		NULL,						/* 1Fh */
+		"Enclosure Management"				/* 20h */
+	};
+
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/*
+ *	mpt_sas_log_info - Log information returned from SAS IOC.
+ *	@ioc: Pointer to MPT_ADAPTER structure
+ *	@log_info: U32 LogInfo reply word from the IOC
+ *
+ *	Refer to lsi/mpi_log_sas.h.
+ */
+static void
+mpt_sas_log_info(MPT_ADAPTER *ioc, u32 log_info)
+{
+union loginfo_type {
+	u32	loginfo;
+	struct {
+		u32	subcode:16;
+		u32	code:8;
+		u32	originator:4;
+		u32	bus_type:4;
+	}dw;
+};
+	union loginfo_type sas_loginfo;
+	char *code_desc = NULL;
+
+	sas_loginfo.loginfo = log_info;
+	if ((sas_loginfo.dw.bus_type != 3 /*SAS*/) &&
+	    (sas_loginfo.dw.originator < sizeof(originator_str)/sizeof(char*)))
+		return;
+	if ((sas_loginfo.dw.originator == 0 /*IOP*/) &&
+	    (sas_loginfo.dw.code < sizeof(iop_code_str)/sizeof(char*))) {
+		code_desc = iop_code_str[sas_loginfo.dw.code];
+	}else if ((sas_loginfo.dw.originator == 1 /*PL*/) &&
+	    (sas_loginfo.dw.code < sizeof(pl_code_str)/sizeof(char*) )) {
+		code_desc = pl_code_str[sas_loginfo.dw.code];
+	}
+
+	if (code_desc != NULL)
+		printk(MYIOC_s_INFO_FMT
+			"LogInfo(0x%08x): Originator={%s}, Code={%s},"
+			" SubCode(0x%04x)\n",
+			ioc->name,
+			log_info,
+			originator_str[sas_loginfo.dw.originator],
+			code_desc,
+			sas_loginfo.dw.subcode);
+	else
+		printk(MYIOC_s_INFO_FMT
+			"LogInfo(0x%08x): Originator={%s}, Code=(0x%02x),"
+			" SubCode(0x%04x)\n",
+			ioc->name,
+			log_info,
+			originator_str[sas_loginfo.dw.originator],
+			sas_loginfo.dw.code,
+			sas_loginfo.dw.subcode);
+}
+
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /*
  *	mpt_sp_ioc_info - IOC information returned from SCSI Parallel IOC.