D7043.id18050.diff
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	Index: sys/dev/mps/mps_sas.c
	===================================================================
	--- sys/dev/mps/mps_sas.c
	+++ sys/dev/mps/mps_sas.c
	@@ -928,6 +928,8 @@
	case XPT_PATH_INQ:
	{
	struct ccb_pathinq *cpi = &ccb->cpi;
	+ struct mps_softc *sc = sassc->sc;
	+ uint8_t sges_per_frame;

	cpi->version_num = 1;
	cpi->hba_inquiry = PI_SDTR_ABLE\|PI_TAG_ABLE\|PI_WIDE_16;
	@@ -951,12 +953,16 @@
	cpi->transport_version = 0;
	cpi->protocol = PROTO_SCSI;
	cpi->protocol_version = SCSI_REV_SPC;
	-#if __FreeBSD_version >= 800001
	+
	/*
	- * XXX KDM where does this number come from?
	- */
	- cpi->maxio = 256 * 1024;
	-#endif
	+ * Max IO Size is Page Size * the following:
	+ * ((SGEs per frame - 1 for chain element) *
	+ * Max Chain Depth) + 1 for no chain needed in last frame
	+ */
	+ sges_per_frame = ((sc->facts->IOCRequestFrameSize * 4) /
	+ sizeof(MPI2_SGE_SIMPLE64)) - 1;
	+ cpi->maxio = (sges_per_frame * sc->facts->MaxChainDepth + 1);
	+ cpi->maxio *= PAGE_SIZE;
	mpssas_set_ccbstatus(ccb, CAM_REQ_CMP);
	break;
	}