diff options
Diffstat (limited to 'sys/dev/mps/mps_sas.c')
| -rw-r--r-- | sys/dev/mps/mps_sas.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/sys/dev/mps/mps_sas.c b/sys/dev/mps/mps_sas.c index 6a34c38..2f23612 100644 --- a/sys/dev/mps/mps_sas.c +++ b/sys/dev/mps/mps_sas.c @@ -928,6 +928,8 @@ mpssas_action(struct cam_sim *sim, union ccb *ccb) 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 +953,23 @@ mpssas_action(struct cam_sim *sim, union ccb *ccb) 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? + * 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 + * + * If user suggests a Max IO size to use, use the smaller of the + * user's value and the calculated value as long as the user's + * value is larger than 0. The user's value is in pages. */ - cpi->maxio = 256 * 1024; -#endif + 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; + if ((sc->max_io_pages > 0) && (sc->max_io_pages * PAGE_SIZE < + cpi->maxio)) + cpi->maxio = sc->max_io_pages * PAGE_SIZE; mpssas_set_ccbstatus(ccb, CAM_REQ_CMP); break; } |
