diff --git a/sys/dev/mpt/mpt.c b/sys/dev/mpt/mpt.c
index a937f61bad9..1e14f6f5857 100644
--- a/sys/dev/mpt/mpt.c
+++ b/sys/dev/mpt/mpt.c
@@ -503,6 +503,8 @@ mpt_config_reply_handler(struct mpt_softc *mpt, request_t *req,
 			req->IOCStatus = le16toh(reply_frame->IOCStatus);
 			bcopy(&reply->Header, &cfgp->Header,
 			      sizeof(cfgp->Header));
+			cfgp->ExtPageLength = reply->ExtPageLength;
+			cfgp->ExtPageType = reply->ExtPageType;
 		}
 		req->state &= ~REQ_STATE_QUEUED;
 		req->state |= REQ_STATE_DONE;
@@ -1548,31 +1550,37 @@ mpt_send_ioc_init(struct mpt_softc *mpt, uint32_t who)
  * Utiltity routine to read configuration headers and pages
  */
 int
-mpt_issue_cfg_req(struct mpt_softc *mpt, request_t *req, u_int Action,
-		  u_int PageVersion, u_int PageLength, u_int PageNumber,
-		  u_int PageType, uint32_t PageAddress, bus_addr_t addr,
-		  bus_size_t len, int sleep_ok, int timeout_ms)
+mpt_issue_cfg_req(struct mpt_softc *mpt, request_t *req, cfgparms_t *params,
+		  bus_addr_t addr, bus_size_t len, int sleep_ok, int timeout_ms)
 {
 	MSG_CONFIG *cfgp;
 	SGE_SIMPLE32 *se;
 
 	cfgp = req->req_vbuf;
 	memset(cfgp, 0, sizeof *cfgp);
-	cfgp->Action = Action;
+	cfgp->Action = params->Action;
 	cfgp->Function = MPI_FUNCTION_CONFIG;
-	cfgp->Header.PageVersion = PageVersion;
-	cfgp->Header.PageLength = PageLength;
-	cfgp->Header.PageNumber = PageNumber;
-	cfgp->Header.PageType = PageType;
-	cfgp->PageAddress = htole32(PageAddress);
+	cfgp->Header.PageVersion = params->PageVersion;
+	cfgp->Header.PageNumber = params->PageNumber;
+	cfgp->PageAddress = htole32(params->PageAddress);
+	if ((params->PageType & MPI_CONFIG_PAGETYPE_MASK) ==
+	    MPI_CONFIG_PAGETYPE_EXTENDED) {
+		cfgp->Header.PageType = MPI_CONFIG_PAGETYPE_EXTENDED;
+		cfgp->Header.PageLength = 0;
+		cfgp->ExtPageLength = htole16(params->ExtPageLength);
+		cfgp->ExtPageType = params->ExtPageType;
+	} else {
+		cfgp->Header.PageType = params->PageType;
+		cfgp->Header.PageLength = params->PageLength;
+	}
 	se = (SGE_SIMPLE32 *)&cfgp->PageBufferSGE;
 	se->Address = htole32(addr);
 	MPI_pSGE_SET_LENGTH(se, len);
 	MPI_pSGE_SET_FLAGS(se, (MPI_SGE_FLAGS_SIMPLE_ELEMENT |
 	    MPI_SGE_FLAGS_LAST_ELEMENT | MPI_SGE_FLAGS_END_OF_BUFFER |
 	    MPI_SGE_FLAGS_END_OF_LIST |
-	    ((Action == MPI_CONFIG_ACTION_PAGE_WRITE_CURRENT
-	  || Action == MPI_CONFIG_ACTION_PAGE_WRITE_NVRAM)
+	    ((params->Action == MPI_CONFIG_ACTION_PAGE_WRITE_CURRENT
+	  || params->Action == MPI_CONFIG_ACTION_PAGE_WRITE_NVRAM)
 	   ? MPI_SGE_FLAGS_HOST_TO_IOC : MPI_SGE_FLAGS_IOC_TO_HOST)));
 	se->FlagsLength = htole32(se->FlagsLength);
 	cfgp->MsgContext = htole32(req->index | MPT_REPLY_HANDLER_CONFIG);
@@ -1583,6 +1591,113 @@ mpt_issue_cfg_req(struct mpt_softc *mpt, request_t *req, u_int Action,
 			     sleep_ok, timeout_ms));
 }
 
+int
+mpt_read_extcfg_header(struct mpt_softc *mpt, int PageVersion, int PageNumber,
+		       uint32_t PageAddress, int ExtPageType,
+		       CONFIG_EXTENDED_PAGE_HEADER *rslt,
+		       int sleep_ok, int timeout_ms)
+{
+	request_t  *req;
+	cfgparms_t params;
+	MSG_CONFIG_REPLY *cfgp;
+	int	    error;
+
+	req = mpt_get_request(mpt, sleep_ok);
+	if (req == NULL) {
+		mpt_prt(mpt, "mpt_extread_cfg_header: Get request failed!\n");
+		return (ENOMEM);
+	}
+
+	params.Action = MPI_CONFIG_ACTION_PAGE_HEADER;
+	params.PageVersion = PageVersion;
+	params.PageLength = 0;
+	params.PageNumber = PageNumber;
+	params.PageType = MPI_CONFIG_PAGETYPE_EXTENDED;
+	params.PageAddress = PageAddress;
+	params.ExtPageType = ExtPageType;
+	params.ExtPageLength = 0;
+	error = mpt_issue_cfg_req(mpt, req, &params, /*addr*/0, /*len*/0,
+				  sleep_ok, timeout_ms);
+	if (error != 0) {
+		/*
+		 * Leave the request. Without resetting the chip, it's
+		 * still owned by it and we'll just get into trouble
+		 * freeing it now. Mark it as abandoned so that if it
+		 * shows up later it can be freed.
+		 */
+		mpt_prt(mpt, "read_extcfg_header timed out\n");
+		return (ETIMEDOUT);
+	}
+
+        switch (req->IOCStatus & MPI_IOCSTATUS_MASK) {
+	case MPI_IOCSTATUS_SUCCESS:
+		cfgp = req->req_vbuf;
+		rslt->PageVersion = cfgp->Header.PageVersion;
+		rslt->PageNumber = cfgp->Header.PageNumber;
+		rslt->PageType = cfgp->Header.PageType;
+		rslt->ExtPageLength = cfgp->ExtPageLength;
+		rslt->ExtPageType = cfgp->ExtPageType;
+		error = 0;
+		break;
+	case MPI_IOCSTATUS_CONFIG_INVALID_PAGE:
+		mpt_lprt(mpt, MPT_PRT_DEBUG,
+		    "Invalid Page Type %d Number %d Addr 0x%0x\n",
+		    MPI_CONFIG_PAGETYPE_EXTENDED, PageNumber, PageAddress);
+		error = EINVAL;
+		break;
+	default:
+		mpt_prt(mpt, "mpt_read_extcfg_header: Config Info Status %x\n",
+			req->IOCStatus);
+		error = EIO;
+		break;
+	}
+	mpt_free_request(mpt, req);
+	return (error);
+}
+
+int
+mpt_read_extcfg_page(struct mpt_softc *mpt, int Action, uint32_t PageAddress,
+		     CONFIG_EXTENDED_PAGE_HEADER *hdr, void *buf, size_t len,
+		     int sleep_ok, int timeout_ms)
+{
+	request_t    *req;
+	cfgparms_t    params;
+	int	      error;
+
+	req = mpt_get_request(mpt, sleep_ok);
+	if (req == NULL) {
+		mpt_prt(mpt, "mpt_read_cfg_page: Get request failed!\n");
+		return (-1);
+	}
+
+	params.Action = Action;
+	params.PageVersion = hdr->PageVersion;
+	params.PageLength = 0;
+	params.PageNumber = hdr->PageNumber;
+	params.PageType = MPI_CONFIG_PAGETYPE_EXTENDED;
+	params.PageAddress = PageAddress;
+	params.ExtPageType = hdr->ExtPageType;
+	params.ExtPageLength = hdr->ExtPageLength;
+	error = mpt_issue_cfg_req(mpt, req, &params,
+				  req->req_pbuf + MPT_RQSL(mpt),
+				  len, sleep_ok, timeout_ms);
+	if (error != 0) {
+		mpt_prt(mpt, "read_extcfg_page(%d) timed out\n", Action);
+		return (-1);
+	}
+
+	if ((req->IOCStatus & MPI_IOCSTATUS_MASK) != MPI_IOCSTATUS_SUCCESS) {
+		mpt_prt(mpt, "mpt_read_extcfg_page: Config Info Status %x\n",
+			req->IOCStatus);
+		mpt_free_request(mpt, req);
+		return (-1);
+	}
+	bus_dmamap_sync(mpt->request_dmat, mpt->request_dmap,
+	    BUS_DMASYNC_POSTREAD);
+	memcpy(buf, ((uint8_t *)req->req_vbuf)+MPT_RQSL(mpt), len);
+	mpt_free_request(mpt, req);
+	return (0);
+}
 
 int
 mpt_read_cfg_header(struct mpt_softc *mpt, int PageType, int PageNumber,
@@ -1590,6 +1705,7 @@ mpt_read_cfg_header(struct mpt_softc *mpt, int PageType, int PageNumber,
 		    int sleep_ok, int timeout_ms)
 {
 	request_t  *req;
+	cfgparms_t params;
 	MSG_CONFIG *cfgp;
 	int	    error;
 
@@ -1599,9 +1715,13 @@ mpt_read_cfg_header(struct mpt_softc *mpt, int PageType, int PageNumber,
 		return (ENOMEM);
 	}
 
-	error = mpt_issue_cfg_req(mpt, req, MPI_CONFIG_ACTION_PAGE_HEADER,
-				  /*PageVersion*/0, /*PageLength*/0, PageNumber,
-				  PageType, PageAddress, /*addr*/0, /*len*/0,
+	params.Action = MPI_CONFIG_ACTION_PAGE_HEADER;
+	params.PageVersion = 0;
+	params.PageLength = 0;
+	params.PageNumber = PageNumber;
+	params.PageType = PageType;
+	params.PageAddress = PageAddress;
+	error = mpt_issue_cfg_req(mpt, req, &params, /*addr*/0, /*len*/0,
 				  sleep_ok, timeout_ms);
 	if (error != 0) {
 		/*
@@ -1642,6 +1762,7 @@ mpt_read_cfg_page(struct mpt_softc *mpt, int Action, uint32_t PageAddress,
 		  int timeout_ms)
 {
 	request_t    *req;
+	cfgparms_t    params;
 	int	      error;
 
 	req = mpt_get_request(mpt, sleep_ok);
@@ -1650,10 +1771,14 @@ mpt_read_cfg_page(struct mpt_softc *mpt, int Action, uint32_t PageAddress,
 		return (-1);
 	}
 
-	error = mpt_issue_cfg_req(mpt, req, Action, hdr->PageVersion,
-				  hdr->PageLength, hdr->PageNumber,
-				  hdr->PageType & MPI_CONFIG_PAGETYPE_MASK,
-				  PageAddress, req->req_pbuf + MPT_RQSL(mpt),
+	params.Action = Action;
+	params.PageVersion = hdr->PageVersion;
+	params.PageLength = hdr->PageLength;
+	params.PageNumber = hdr->PageNumber;
+	params.PageType = hdr->PageType & MPI_CONFIG_PAGETYPE_MASK;
+	params.PageAddress = PageAddress;
+	error = mpt_issue_cfg_req(mpt, req, &params,
+				  req->req_pbuf + MPT_RQSL(mpt),
 				  len, sleep_ok, timeout_ms);
 	if (error != 0) {
 		mpt_prt(mpt, "read_cfg_page(%d) timed out\n", Action);
@@ -1679,6 +1804,7 @@ mpt_write_cfg_page(struct mpt_softc *mpt, int Action, uint32_t PageAddress,
 		   int timeout_ms)
 {
 	request_t    *req;
+	cfgparms_t    params;
 	u_int	      hdr_attr;
 	int	      error;
 
@@ -1708,22 +1834,21 @@ mpt_write_cfg_page(struct mpt_softc *mpt, int Action, uint32_t PageAddress,
 	 * if you then mask them going down to issue the request.
 	 */
 
+	params.Action = Action;
+	params.PageVersion = hdr->PageVersion;
+	params.PageLength = hdr->PageLength;
+	params.PageNumber = hdr->PageNumber;
+	params.PageAddress = PageAddress;
 #if	0
 	/* Restore stripped out attributes */
 	hdr->PageType |= hdr_attr;
-
-	error = mpt_issue_cfg_req(mpt, req, Action, hdr->PageVersion,
-				  hdr->PageLength, hdr->PageNumber,
-				  hdr->PageType & MPI_CONFIG_PAGETYPE_MASK,
-				  PageAddress, req->req_pbuf + MPT_RQSL(mpt),
-				  len, sleep_ok, timeout_ms);
+	params.PageType = hdr->PageType & MPI_CONFIG_PAGETYPE_MASK;
 #else
-	error = mpt_issue_cfg_req(mpt, req, Action, hdr->PageVersion,
-				  hdr->PageLength, hdr->PageNumber,
-				  hdr->PageType, PageAddress,
+	params.PageType = hdr->PageType;
+#endif
+	error = mpt_issue_cfg_req(mpt, req, &params,
 				  req->req_pbuf + MPT_RQSL(mpt),
 				  len, sleep_ok, timeout_ms);
-#endif
 	if (error != 0) {
 		mpt_prt(mpt, "mpt_write_cfg_page timed out\n");
 		return (-1);
diff --git a/sys/dev/mpt/mpt.h b/sys/dev/mpt/mpt.h
index 3e18496e9ad..52dbf1cd699 100644
--- a/sys/dev/mpt/mpt.h
+++ b/sys/dev/mpt/mpt.h
@@ -341,6 +341,17 @@ struct req_entry {
 	struct callout  callout;	/* Timeout for the request */
 };
 
+typedef struct mpt_config_params {
+	u_int		Action;
+	u_int		PageVersion;
+	u_int		PageLength;
+	u_int		PageNumber;
+	u_int		PageType;
+	u_int		PageAddress;
+	u_int		ExtPageLength;
+	u_int		ExtPageType;
+} cfgparms_t;
+
 /**************************** MPI Target State Info ***************************/
 
 typedef struct {
@@ -514,6 +525,36 @@ struct mpt_evtf_record {
 
 LIST_HEAD(mpt_evtf_list, mpt_evtf_record);
 
+struct mptsas_devinfo {
+	uint16_t	dev_handle;
+	uint16_t	parent_dev_handle;
+	uint16_t	enclosure_handle;
+	uint16_t	slot;
+	uint8_t		phy_num;
+	uint8_t		physical_port;
+	uint8_t		target_id;
+	uint8_t		bus;
+	uint64_t	sas_address;
+	uint32_t	device_info;
+};
+
+struct mptsas_phyinfo {
+	uint16_t	handle;
+	uint8_t		phy_num;
+	uint8_t		port_id;
+	uint8_t		negotiated_link_rate;
+	uint8_t		hw_link_rate;
+	uint8_t		programmed_link_rate;
+	uint8_t		sas_port_add_phy;
+	struct mptsas_devinfo identify;
+	struct mptsas_devinfo attached;
+};
+
+struct mptsas_portinfo {
+	uint16_t			num_phys;
+	struct mptsas_phyinfo		*phy_info;
+};
+
 struct mpt_softc {
 	device_t		dev;
 #if __FreeBSD_version < 500000  
@@ -721,6 +762,9 @@ struct mpt_softc {
 	bus_dmamap_t		fw_dmap;	/* DMA map for firmware image */
 	bus_addr_t		fw_phys;	/* BusAddr of firmware image */
 
+	/* SAS Topology */
+	struct mptsas_portinfo	*sas_portinfo;
+
 	/* Shutdown Event Handler. */
 	eventhandler_tag         eh;
 
@@ -1186,11 +1230,19 @@ void		mpt_dump_reply_frame(struct mpt_softc *mpt,
 
 void		mpt_set_config_regs(struct mpt_softc *);
 int		mpt_issue_cfg_req(struct mpt_softc */*mpt*/, request_t */*req*/,
-				  u_int /*Action*/, u_int /*PageVersion*/,
-				  u_int /*PageLength*/, u_int /*PageNumber*/,
-				  u_int /*PageType*/, uint32_t /*PageAddress*/,
+				  cfgparms_t *params,
 				  bus_addr_t /*addr*/, bus_size_t/*len*/,
 				  int /*sleep_ok*/, int /*timeout_ms*/);
+int		mpt_read_extcfg_header(struct mpt_softc *mpt, int PageVersion,
+				       int PageNumber, uint32_t PageAddress,
+				       int ExtPageType,
+				       CONFIG_EXTENDED_PAGE_HEADER *rslt,
+				       int sleep_ok, int timeout_ms);
+int		mpt_read_extcfg_page(struct mpt_softc *mpt, int Action,
+				     uint32_t PageAddress,
+				     CONFIG_EXTENDED_PAGE_HEADER *hdr,
+				     void *buf, size_t len, int sleep_ok,
+				     int timeout_ms);
 int		mpt_read_cfg_header(struct mpt_softc *, int /*PageType*/,
 				    int /*PageNumber*/,
 				    uint32_t /*PageAddress*/,
diff --git a/sys/dev/mpt/mpt_cam.c b/sys/dev/mpt/mpt_cam.c
index 59f1eb44b96..4c7ddf3baca 100644
--- a/sys/dev/mpt/mpt_cam.c
+++ b/sys/dev/mpt/mpt_cam.c
@@ -104,6 +104,7 @@ __FBSDID("$FreeBSD$");
 #include "dev/mpt/mpilib/mpi_init.h"
 #include "dev/mpt/mpilib/mpi_targ.h"
 #include "dev/mpt/mpilib/mpi_fc.h"
+#include "dev/mpt/mpilib/mpi_sas.h"
 #if __FreeBSD_version >= 500000
 #include <sys/sysctl.h>
 #endif
@@ -159,10 +160,12 @@ mpt_scsi_tgt_tsk_mgmt(struct mpt_softc *, request_t *, mpt_task_mgmt_t,
 static void mpt_tgt_dump_tgt_state(struct mpt_softc *, request_t *);
 static void mpt_tgt_dump_req_state(struct mpt_softc *, request_t *);
 static mpt_reply_handler_t mpt_scsi_tgt_reply_handler;
+static mpt_reply_handler_t mpt_sata_pass_reply_handler;
 
 static uint32_t scsi_io_handler_id = MPT_HANDLER_ID_NONE;
 static uint32_t scsi_tmf_handler_id = MPT_HANDLER_ID_NONE;
 static uint32_t fc_els_handler_id = MPT_HANDLER_ID_NONE;
+static uint32_t sata_pass_handler_id = MPT_HANDLER_ID_NONE;
 
 static mpt_probe_handler_t	mpt_cam_probe;
 static mpt_attach_handler_t	mpt_cam_attach;
@@ -187,6 +190,9 @@ static struct mpt_personality mpt_cam_personality =
 DECLARE_MPT_PERSONALITY(mpt_cam, SI_ORDER_SECOND);
 MODULE_DEPEND(mpt_cam, cam, 1, 1, 1);
 
+int mpt_enable_sata_wc = -1;
+TUNABLE_INT("hw.mpt.enable_sata_wc", &mpt_enable_sata_wc);
+
 int
 mpt_cam_probe(struct mpt_softc *mpt)
 {
@@ -273,6 +279,16 @@ mpt_cam_attach(struct mpt_softc *mpt)
 		}
 	}
 
+	if (mpt->is_sas) {
+		handler.reply_handler = mpt_sata_pass_reply_handler;
+		error = mpt_register_handler(mpt, MPT_HANDLER_REPLY, handler,
+		    &sata_pass_handler_id);
+		if (error != 0) {
+			MPT_UNLOCK(mpt);
+			goto cleanup;
+		}
+	}
+
 	/*
 	 * We keep one request reserved for timeout TMF requests.
 	 */
@@ -584,24 +600,310 @@ mpt_set_initial_config_fc(struct mpt_softc *mpt)
 	return (0);
 }
 
+static int
+mptsas_sas_io_unit_pg0(struct mpt_softc *mpt, struct mptsas_portinfo *portinfo)
+{
+	ConfigExtendedPageHeader_t hdr;
+	struct mptsas_phyinfo *phyinfo;
+	SasIOUnitPage0_t *buffer;
+	int error, len, i;
+
+	error = mpt_read_extcfg_header(mpt, MPI_SASIOUNITPAGE0_PAGEVERSION,
+				       0, 0, MPI_CONFIG_EXTPAGETYPE_SAS_IO_UNIT,
+				       &hdr, 0, 10000);
+	if (error)
+		goto out;
+	if (hdr.ExtPageLength == 0) {
+		error = ENXIO;
+		goto out;
+	}
+
+	len = hdr.ExtPageLength * 4;
+	buffer = malloc(len, M_DEVBUF, M_NOWAIT|M_ZERO);
+	if (buffer == NULL) {
+		error = ENOMEM;
+		goto out;
+	}
+
+	error = mpt_read_extcfg_page(mpt, MPI_CONFIG_ACTION_PAGE_READ_CURRENT,
+				     0, &hdr, buffer, len, 0, 10000);
+	if (error) {
+		free(buffer, M_DEVBUF);
+		goto out;
+	}
+
+	portinfo->num_phys = buffer->NumPhys;
+	portinfo->phy_info = malloc(sizeof(*portinfo->phy_info) *
+	    portinfo->num_phys, M_DEVBUF, M_NOWAIT|M_ZERO);
+	if (portinfo->phy_info == NULL) {
+		free(buffer, M_DEVBUF);
+		error = ENOMEM;
+		goto out;
+	}
+
+	for (i = 0; i < portinfo->num_phys; i++) {
+		phyinfo = &portinfo->phy_info[i];
+		phyinfo->phy_num = i;
+		phyinfo->port_id = buffer->PhyData[i].Port;
+		phyinfo->negotiated_link_rate =
+		    buffer->PhyData[i].NegotiatedLinkRate;
+		phyinfo->handle =
+		    le16toh(buffer->PhyData[i].ControllerDevHandle);
+	}
+
+	free(buffer, M_DEVBUF);
+out:
+	return (error);
+}
+
+static int
+mptsas_sas_phy_pg0(struct mpt_softc *mpt, struct mptsas_phyinfo *phy_info,
+	uint32_t form, uint32_t form_specific)
+{
+	ConfigExtendedPageHeader_t hdr;
+	SasPhyPage0_t *buffer;
+	int error;
+
+	error = mpt_read_extcfg_header(mpt, MPI_SASPHY0_PAGEVERSION, 0, 0,
+				       MPI_CONFIG_EXTPAGETYPE_SAS_PHY, &hdr,
+				       0, 10000);
+	if (error)
+		goto out;
+	if (hdr.ExtPageLength == 0) {
+		error = ENXIO;
+		goto out;
+	}
+
+	buffer = malloc(sizeof(SasPhyPage0_t), M_DEVBUF, M_NOWAIT|M_ZERO);
+	if (buffer == NULL) {
+		error = ENOMEM;
+		goto out;
+	}
+
+	error = mpt_read_extcfg_page(mpt, MPI_CONFIG_ACTION_PAGE_READ_CURRENT,
+				     form + form_specific, &hdr, buffer,
+				     sizeof(SasPhyPage0_t), 0, 10000);
+	if (error) {
+		free(buffer, M_DEVBUF);
+		goto out;
+	}
+
+	phy_info->hw_link_rate = buffer->HwLinkRate;
+	phy_info->programmed_link_rate = buffer->ProgrammedLinkRate;
+	phy_info->identify.dev_handle = le16toh(buffer->OwnerDevHandle);
+	phy_info->attached.dev_handle = le16toh(buffer->AttachedDevHandle);
+
+	free(buffer, M_DEVBUF);
+out:
+	return (error);
+}
+
+static int
+mptsas_sas_device_pg0(struct mpt_softc *mpt, struct mptsas_devinfo *device_info,
+	uint32_t form, uint32_t form_specific)
+{
+	ConfigExtendedPageHeader_t hdr;
+	SasDevicePage0_t *buffer;
+	uint64_t sas_address;
+	int error = 0;
+
+	bzero(device_info, sizeof(*device_info));
+	error = mpt_read_extcfg_header(mpt, MPI_SASDEVICE0_PAGEVERSION, 0, 0,
+				       MPI_CONFIG_EXTPAGETYPE_SAS_DEVICE,
+				       &hdr, 0, 10000);
+	if (error)
+		goto out;
+	if (hdr.ExtPageLength == 0) {
+		error = ENXIO;
+		goto out;
+	}
+
+	buffer = malloc(sizeof(SasDevicePage0_t), M_DEVBUF, M_NOWAIT|M_ZERO);
+	if (buffer == NULL) {
+		error = ENOMEM;
+		goto out;
+	}
+
+	error = mpt_read_extcfg_page(mpt, MPI_CONFIG_ACTION_PAGE_READ_CURRENT,
+				     form + form_specific, &hdr, buffer,
+				     sizeof(SasDevicePage0_t), 0, 10000);
+	if (error) {
+		free(buffer, M_DEVBUF);
+		goto out;
+	}
+
+	device_info->dev_handle = le16toh(buffer->DevHandle);
+	device_info->parent_dev_handle = le16toh(buffer->ParentDevHandle);
+	device_info->enclosure_handle = le16toh(buffer->EnclosureHandle);
+	device_info->slot = le16toh(buffer->Slot);
+	device_info->phy_num = buffer->PhyNum;
+	device_info->physical_port = buffer->PhysicalPort;
+	device_info->target_id = buffer->TargetID;
+	device_info->bus = buffer->Bus;
+	bcopy(&buffer->SASAddress, &sas_address, sizeof(uint64_t));
+	device_info->sas_address = le64toh(sas_address);
+	device_info->device_info = le32toh(buffer->DeviceInfo);
+
+	free(buffer, M_DEVBUF);
+out:
+	return (error);
+}
+
 /*
  * Read SAS configuration information. Nothing to do yet.
  */
 static int
 mpt_read_config_info_sas(struct mpt_softc *mpt)
 {
+	struct mptsas_portinfo *portinfo;
+	struct mptsas_phyinfo *phyinfo;
+	int error, i;
+
+	portinfo = malloc(sizeof(*portinfo), M_DEVBUF, M_NOWAIT|M_ZERO);
+	if (portinfo == NULL)
+		return (ENOMEM);
+
+	error = mptsas_sas_io_unit_pg0(mpt, portinfo);
+	if (error) {
+		free(portinfo, M_DEVBUF);
+		return (0);
+	}
+
+	for (i = 0; i < portinfo->num_phys; i++) {
+		phyinfo = &portinfo->phy_info[i];
+		error = mptsas_sas_phy_pg0(mpt, phyinfo,
+		    (MPI_SAS_PHY_PGAD_FORM_PHY_NUMBER <<
+		    MPI_SAS_PHY_PGAD_FORM_SHIFT), i);
+		if (error)
+			break;
+		error = mptsas_sas_device_pg0(mpt, &phyinfo->identify,
+		    (MPI_SAS_DEVICE_PGAD_FORM_HANDLE <<
+		    MPI_SAS_DEVICE_PGAD_FORM_SHIFT),
+		    phyinfo->handle);
+		if (error)
+			break;
+		phyinfo->identify.phy_num = phyinfo->phy_num = i;
+		if (phyinfo->attached.dev_handle)
+			error = mptsas_sas_device_pg0(mpt,
+			    &phyinfo->attached,
+			    (MPI_SAS_DEVICE_PGAD_FORM_HANDLE <<
+			    MPI_SAS_DEVICE_PGAD_FORM_SHIFT),
+			    phyinfo->attached.dev_handle);
+		if (error)
+			break;
+	}
+	mpt->sas_portinfo = portinfo;
+	free(portinfo, M_DEVBUF);
 	return (0);
 }
 
+static void
+mptsas_set_sata_wc(struct mpt_softc *mpt, struct mptsas_devinfo *devinfo,
+	int enabled)
+{
+	SataPassthroughRequest_t	*pass;
+	request_t *req;
+	int error, status;
+
+	req = mpt_get_request(mpt, 0);
+	if (req == NULL)
+		return;
+
+	pass = req->req_vbuf;
+	bzero(pass, sizeof(SataPassthroughRequest_t));
+	pass->Function = MPI_FUNCTION_SATA_PASSTHROUGH;
+	pass->TargetID = devinfo->target_id;
+	pass->Bus = devinfo->bus;
+	pass->PassthroughFlags = 0;
+	pass->ConnectionRate = MPI_SATA_PT_REQ_CONNECT_RATE_NEGOTIATED;
+	pass->DataLength = 0;
+	pass->MsgContext = htole32(req->index | sata_pass_handler_id);
+	pass->CommandFIS[0] = 0x27;
+	pass->CommandFIS[1] = 0x80;
+	pass->CommandFIS[2] = 0xef;
+	pass->CommandFIS[3] = (enabled) ? 0x02 : 0x82;
+	pass->CommandFIS[7] = 0x40;
+	pass->CommandFIS[15] = 0x08;
+
+	mpt_check_doorbell(mpt);
+	mpt_send_cmd(mpt, req);
+	error = mpt_wait_req(mpt, req, REQ_STATE_DONE, REQ_STATE_DONE, 0,
+			     10 * 1000);
+	if (error) {
+		mpt_free_request(mpt, req);
+		printf("error %d sending passthrough\n", error);
+		return;
+	}
+
+	status = le16toh(req->IOCStatus);
+	if (status != MPI_IOCSTATUS_SUCCESS) {
+		mpt_free_request(mpt, req);
+		printf("IOCSTATUS %d\n", status);
+		return;
+	}
+
+	mpt_free_request(mpt, req);
+}
+
 /*
  * Set SAS configuration information. Nothing to do yet.
  */
 static int
 mpt_set_initial_config_sas(struct mpt_softc *mpt)
 {
+	struct mptsas_phyinfo *phyinfo;
+	int i;
+
+	if ((mpt_enable_sata_wc != -1) && (mpt->sas_portinfo != NULL)) {
+		for (i = 0; i < mpt->sas_portinfo->num_phys; i++) {
+			phyinfo = &mpt->sas_portinfo->phy_info[i];
+			if (phyinfo->attached.dev_handle == 0)
+				continue;
+			if ((phyinfo->attached.device_info &
+			    MPI_SAS_DEVICE_INFO_SATA_DEVICE) == 0)
+				continue;
+			if (bootverbose)
+				device_printf(mpt->dev,
+				    "%sabling SATA WC on phy %d\n",
+				    (mpt_enable_sata_wc) ? "En" : "Dis", i);
+			mptsas_set_sata_wc(mpt, &phyinfo->attached,
+					   mpt_enable_sata_wc);
+		}
+	}
+
 	return (0);
 }
 
+static int
+mpt_sata_pass_reply_handler(struct mpt_softc *mpt, request_t *req,
+ uint32_t reply_desc, MSG_DEFAULT_REPLY *reply_frame)
+{
+	if (req != NULL) {
+
+		if (reply_frame != NULL) {
+			MSG_SATA_PASSTHROUGH_REQUEST *pass;
+			MSG_SATA_PASSTHROUGH_REPLY *reply;
+
+			pass = (MSG_SATA_PASSTHROUGH_REQUEST *)req->req_vbuf;
+			reply = (MSG_SATA_PASSTHROUGH_REPLY *)reply_frame;
+			req->IOCStatus = le16toh(reply_frame->IOCStatus);
+		}
+		req->state &= ~REQ_STATE_QUEUED;
+		req->state |= REQ_STATE_DONE;
+		TAILQ_REMOVE(&mpt->request_pending_list, req, links);
+		if ((req->state & REQ_STATE_NEED_WAKEUP) != 0) {
+			wakeup(req);
+		} else if ((req->state & REQ_STATE_TIMEDOUT) != 0) {
+			/*
+			 * Whew- we can free this request (late completion)
+			 */
+			mpt_free_request(mpt, req);
+		}
+	}
+
+	return (TRUE);
+}
+
 /*
  * Read SCSI configuration information
  */
@@ -888,6 +1190,9 @@ mpt_cam_detach(struct mpt_softc *mpt)
 	handler.reply_handler = mpt_scsi_tgt_reply_handler;
 	mpt_deregister_handler(mpt, MPT_HANDLER_REPLY, handler,
 			       mpt->scsi_tgt_handler_id);
+	handler.reply_handler = mpt_sata_pass_reply_handler;
+	mpt_deregister_handler(mpt, MPT_HANDLER_REPLY, handler,
+			       sata_pass_handler_id);
 
 	if (mpt->tmf_req != NULL) {
 		mpt->tmf_req->state = REQ_STATE_ALLOCATED;