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Remove race conditions caused by the CPU cache of PA7100 CPUs.

This commit is contained in:
jkunz 2004-08-26 16:56:07 +00:00
parent 70b14a8138
commit 6c6c2be95f
1 changed files with 9 additions and 14 deletions
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23
sys/dev/ic/i82596.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: i82596.c,v 1.1 2004/03/12 11:37:17 jkunz Exp $ */
/* $NetBSD: i82596.c,v 1.2 2004/08/26 16:56:07 jkunz Exp $ */
/*
* Copyright (c) 2003 Jochen Kunz.
@ -39,7 +39,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i82596.c,v 1.1 2004/03/12 11:37:17 jkunz Exp $");
__KERNEL_RCSID(0, "$NetBSD: i82596.c,v 1.2 2004/08/26 16:56:07 jkunz Exp $");
/* autoconfig and device stuff */
#include <sys/param.h>
@ -202,12 +202,9 @@ iee_intr(void *intarg)
BUS_DMASYNC_POSTREAD);
scb_status = SC_SCB->scb_status;
scb_cmd = SC_SCB->scb_cmd;
n = 0;
rfd = SC_RFD(sc->sc_rx_done);
while ((scb_status & IEE_SCB_STAT_FR) != 0
&& (rfd->rfd_status & IEE_RFD_B) == 0 && rfd->rfd_status != 0) {
while ((rfd->rfd_status & IEE_RFD_C) != 0) {
/* At least one packet was received. */
n = 1;
rbd = SC_RBD(sc->sc_rx_done);
rx_map = sc->sc_rx_map[sc->sc_rx_done];
rx_mbuf = sc->sc_rx_mbuf[sc->sc_rx_done];
@ -289,13 +286,10 @@ iee_intr(void *intarg)
(sc->sc_iee_cmd)(sc, IEE_SCB_RUC_ST);
printf("%s: iee_intr: receive ring buffer overrun\n",
sc->sc_dev.dv_xname);
} else
if (n != 0)
bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map,
IEE_RFD_OFF, IEE_RFD_LIST_SZ + IEE_RBD_LIST_SZ,
BUS_DMASYNC_PREWRITE);
}
if (sc->sc_next_cb != 0 && (scb_status & IEE_SCB_CUS_ACT) == 0) {
if (sc->sc_next_cb != 0
&& (SC_CB(sc->sc_next_cb - 1)->cb_status & IEE_CB_C) != 0) {
/* CMD list finished */
ifp->if_timer = 0;
if (sc->sc_next_tbd != 0) {
@ -317,8 +311,7 @@ iee_intr(void *intarg)
for (n = 0 ; n < sc->sc_next_cb ; n++) {
/* Check if a CMD failed, but ignore TX errors. */
if ((SC_CB(n)->cb_cmd & IEE_CB_CMD) != IEE_CB_CMD_TR
&& ((SC_CB(n)->cb_status & IEE_CB_C) == 0
|| (SC_CB(n)->cb_status & IEE_CB_OK) == 0))
&& ((SC_CB(n)->cb_status & IEE_CB_OK) == 0))
printf("%s: iee_intr: scb_status=0x%x "
"scb_cmd=0x%x failed command %d: "
"cb_status[%d]=0x%.4x cb_cmd[%d]=0x%.4x\n",
@ -365,6 +358,8 @@ iee_intr(void *intarg)
printf("%s: iee_intr: short_fr_err=%d\n", sc->sc_dev.dv_xname,
sc->sc_short_fr_err);
}
bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 0, IEE_SHMEM_MAX,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
(sc->sc_iee_cmd)(sc, IEE_SCB_ACK);
return(1);
}