Set the chain_offset field (same as sgl_offset0, only in 16 byte units)

in passthrough IO requests, which makes AEN processing work on SAS2208
controllers, and since AEN processing works now, enable it again.

tested on SAS2208 (PERC H710P) and SAS3108 (PERC H730), SAS3.5 parts
should work too.
ok dlg@

diff --git a/sys/dev/pci/mfii.c b/sys/dev/pci/mfii.c
index c9ccd6a..5c40fe8 100644 (file)
--- a/sys/dev/pci/mfii.c
+++ b/sys/dev/pci/mfii.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: mfii.c,v 1.46 2018/02/02 11:24:37 jsg Exp $ */
+/* $OpenBSD: mfii.c,v 1.47 2018/02/20 05:40:52 jmatthew Exp $ */
 
 /*
  * Copyright (c) 2012 David Gwynne <dlg@openbsd.org>
@@ -630,22 +630,18 @@ mfii_attach(struct device *parent, struct device *self, void *aux)
 
        mfii_syspd(sc);
 
-#ifdef notyet
        if (mfii_aen_register(sc) != 0) {
                /* error printed by mfii_aen_register */
                goto intr_disestablish;
        }
-#endif
 
        /* enable interrupts */
        mfii_write(sc, MFI_OSTS, 0xffffffff);
        mfii_write(sc, MFI_OMSK, ~MFII_OSTS_INTR_VALID);
 
        return;
-#ifdef notyet
 intr_disestablish:
        pci_intr_disestablish(sc->sc_pc, sc->sc_ih);
-#endif
 free_sgl:
        mfii_dmamem_free(sc, sc->sc_sgl);
 free_requests:
@@ -851,6 +847,7 @@ mfii_dcmd_start(struct mfii_softc *sc, struct mfii_ccb *ccb)
 
        io->function = MFII_FUNCTION_PASSTHRU_IO;
        io->sgl_offset0 = (uint32_t *)sge - (uint32_t *)io;
+       io->chain_offset = io->sgl_offset0 / 4;
 
        htolem64(&sge->sg_addr, ccb->ccb_sense_dva);
        htolem32(&sge->sg_len, sizeof(*ccb->ccb_sense));