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AHCI 1.3.1 specification says that it is good practice for system software 

to 'zero-out' the memory allocated and referenced by PxCLB and PxFB.
This commit is contained in:
jmcneill 2020-12-26 10:56:25 +00:00
parent 72eb3e2596
commit d90a6f1029
1 changed files with 8 additions and 2 deletions
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10
sys/dev/ic/ahcisata_core.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ahcisata_core.c,v 1.87 2020/12/25 08:57:38 skrll Exp $ */
/* $NetBSD: ahcisata_core.c,v 1.88 2020/12/26 10:56:25 jmcneill Exp $ */
/*
* Copyright (c) 2006 Manuel Bouyer.
@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ahcisata_core.c,v 1.87 2020/12/25 08:57:38 skrll Exp $");
__KERNEL_RCSID(0, "$NetBSD: ahcisata_core.c,v 1.88 2020/12/26 10:56:25 jmcneill Exp $");
#include <sys/types.h>
#include <sys/malloc.h>
@ -363,6 +363,9 @@ ahci_attach(struct ahci_softc *sc)
return;
}
sc->sc_cmd_hdr = cmdhp;
memset(cmdhp, 0, dmasize);
bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_hdrd, 0, dmasize,
BUS_DMASYNC_PREWRITE);
ahci_enable_intrs(sc);
@ -429,6 +432,9 @@ ahci_attach(struct ahci_softc *sc)
", error=%d\n", AHCINAME(sc), error);
break;
}
memset(cmdtblp, 0, dmasize);
bus_dmamap_sync(sc->sc_dmat, achp->ahcic_cmd_tbld, 0,
dmasize, BUS_DMASYNC_PREWRITE);
achp->ahcic_cmdh = (struct ahci_cmd_header *)
((char *)cmdhp + AHCI_CMDH_SIZE * port);
achp->ahcic_bus_cmdh = sc->sc_cmd_hdrd->dm_segs[0].ds_addr +