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[src/trunk]: src/sys/dev/usb iron out multicast filter logic and pick better ...
details: https://anonhg.NetBSD.org/src/rev/39504a4da6dc
branches: trunk
changeset: 746559:39504a4da6dc
user: nisimura <nisimura%NetBSD.org@localhost>
date: Thu Apr 02 04:09:36 2020 +0000
description:
iron out multicast filter logic and pick better name for its work
diffstat:
sys/dev/usb/if_mos.c | 8 ++--
sys/dev/usb/if_url.c | 95 +++++++++++++++++++--------------------------------
2 files changed, 39 insertions(+), 64 deletions(-)
diffs (196 lines):
diff -r ea1addea4518 -r 39504a4da6dc sys/dev/usb/if_mos.c
--- a/sys/dev/usb/if_mos.c Thu Apr 02 03:35:48 2020 +0000
+++ b/sys/dev/usb/if_mos.c Thu Apr 02 04:09:36 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_mos.c,v 1.6 2020/03/31 23:26:32 nisimura Exp $ */
+/* $NetBSD: if_mos.c,v 1.7 2020/04/02 04:09:36 nisimura Exp $ */
/* $OpenBSD: if_mos.c,v 1.40 2019/07/07 06:40:10 kevlo Exp $ */
/*
@@ -72,7 +72,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_mos.c,v 1.6 2020/03/31 23:26:32 nisimura Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_mos.c,v 1.7 2020/04/02 04:09:36 nisimura Exp $");
#include <sys/param.h>
@@ -485,7 +485,7 @@
ec->ec_flags |= ETHER_F_ALLMULTI;
ETHER_UNLOCK(ec);
memset(mchash, 0, sizeof(mchash)); /* correct ??? */
- /* accept all mulicast frame */
+ /* accept all multicast frame */
rxmode |= MOS_CTL_ALLMULTI;
goto update;
}
@@ -743,7 +743,7 @@
mos_reg_write_1(un, MOS_IPG0, ipgs[0]);
mos_reg_write_1(un, MOS_IPG1, ipgs[1]);
- /* Program promiscuous mode and multicast filters. */
+ /* Accept multicast frame or run promisc. mode */
mos_rcvfilt_locked(un);
/* Enable receiver and transmitter, bridge controls speed/duplex mode */
diff -r ea1addea4518 -r 39504a4da6dc sys/dev/usb/if_url.c
--- a/sys/dev/usb/if_url.c Thu Apr 02 03:35:48 2020 +0000
+++ b/sys/dev/usb/if_url.c Thu Apr 02 04:09:36 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_url.c,v 1.76 2020/03/15 23:04:51 thorpej Exp $ */
+/* $NetBSD: if_url.c,v 1.77 2020/04/02 04:09:36 nisimura Exp $ */
/*
* Copyright (c) 2001, 2002
@@ -44,7 +44,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_url.c,v 1.76 2020/03/15 23:04:51 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_url.c,v 1.77 2020/04/02 04:09:36 nisimura Exp $");
#ifdef _KERNEL_OPT
#include "opt_inet.h"
@@ -81,7 +81,7 @@
static void url_uno_stop(struct ifnet *, int);
static void url_uno_mii_statchg(struct ifnet *);
static int url_uno_init(struct ifnet *);
-static void url_setiff_locked(struct usbnet *);
+static void url_rcvfilt_locked(struct usbnet *);
static void url_reset(struct usbnet *);
static int url_csr_read_1(struct usbnet *, int);
@@ -398,20 +398,10 @@
URL_TCR_NOCRC);
/* Init receive control register */
- URL_SETBIT2(un, URL_RCR, URL_RCR_TAIL | URL_RCR_AD);
- if (ifp->if_flags & IFF_BROADCAST)
- URL_SETBIT2(un, URL_RCR, URL_RCR_AB);
- else
- URL_CLRBIT2(un, URL_RCR, URL_RCR_AB);
+ URL_SETBIT2(un, URL_RCR, URL_RCR_TAIL | URL_RCR_AD | URL_RCR_AB);
- /* If we want promiscuous mode, accept all physical frames. */
- if (ifp->if_flags & IFF_PROMISC)
- URL_SETBIT2(un, URL_RCR, URL_RCR_AAM | URL_RCR_AAP);
- else
- URL_CLRBIT2(un, URL_RCR, URL_RCR_AAM | URL_RCR_AAP);
-
- /* Load the multicast filter */
- url_setiff_locked(un);
+ /* Accept multicast frame or run promisc. mode */
+ url_rcvfilt_locked(un);
/* Enable RX and TX */
URL_SETBIT(un, URL_CR, URL_CR_TE | URL_CR_RE);
@@ -454,18 +444,15 @@
delay(10000); /* XXX */
}
-#define url_calchash(addr) (ether_crc32_be((addr), ETHER_ADDR_LEN) >> 26)
-
static void
-url_setiff_locked(struct usbnet *un)
+url_rcvfilt_locked(struct usbnet *un)
{
struct ifnet * const ifp = usbnet_ifp(un);
struct ethercom *ec = usbnet_ec(un);
struct ether_multi *enm;
struct ether_multistep step;
- uint32_t hashes[2] = { 0, 0 };
- int h = 0;
- int mcnt = 0;
+ uint32_t mchash[2] = { 0, 0 };
+ int h = 0, rcr;
DPRINTF(("%s: %s: enter\n", device_xname(un->un_dev), __func__));
@@ -474,52 +461,40 @@
if (usbnet_isdying(un))
return;
+ rcr = url_csr_read_2(un, URL_RCR);
+ rcr &= ~(URL_RCR_AAP | URL_RCR_AAM | URL_RCR_AM);
+
+ ETHER_LOCK(ec);
if (ifp->if_flags & IFF_PROMISC) {
- URL_SETBIT2(un, URL_RCR, URL_RCR_AAM | URL_RCR_AAP);
- return;
- } else if (ifp->if_flags & IFF_ALLMULTI) {
-allmulti:
- ifp->if_flags |= IFF_ALLMULTI;
- URL_SETBIT2(un, URL_RCR, URL_RCR_AAM);
- URL_CLRBIT2(un, URL_RCR, URL_RCR_AAP);
- return;
+ ec->ec_flags |= ETHER_F_ALLMULTI;
+ ETHER_UNLOCK(ec);
+ /* run promisc. mode */
+ rcr |= URL_RCR_AAM; /* ??? */
+ rcr |= URL_RCR_AAP;
+ goto update;
}
-
- /* first, zot all the existing hash bits */
- url_csr_write_4(un, URL_MAR0, 0);
- url_csr_write_4(un, URL_MAR4, 0);
-
- /* now program new ones */
- ETHER_LOCK(ec);
+ ec->ec_flags &= ~ETHER_F_ALLMULTI;
ETHER_FIRST_MULTI(step, ec, enm);
while (enm != NULL) {
- if (memcmp(enm->enm_addrlo, enm->enm_addrhi,
- ETHER_ADDR_LEN) != 0) {
+ if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
+ ec->ec_flags |= ETHER_F_ALLMULTI;
ETHER_UNLOCK(ec);
- goto allmulti;
+ /* accept all multicast frames */
+ rcr |= URL_RCR_AAM;
+ goto update;
}
-
- h = url_calchash(enm->enm_addrlo);
- if (h < 32)
- hashes[0] |= (1 << h);
- else
- hashes[1] |= (1 << (h -32));
- mcnt++;
+ h = ether_crc32_be(enm->enm_addrlo, ETHER_ADDR_LEN);
+ /* 1(31) and 5(30:26) bit sampling */
+ mchash[h >> 31] |= 1 << ((h >> 26) & 0x1f);
ETHER_NEXT_MULTI(step, enm);
}
ETHER_UNLOCK(ec);
-
- ifp->if_flags &= ~IFF_ALLMULTI;
-
- URL_CLRBIT2(un, URL_RCR, URL_RCR_AAM | URL_RCR_AAP);
-
- if (mcnt) {
- URL_SETBIT2(un, URL_RCR, URL_RCR_AM);
- } else {
- URL_CLRBIT2(un, URL_RCR, URL_RCR_AM);
- }
- url_csr_write_4(un, URL_MAR0, hashes[0]);
- url_csr_write_4(un, URL_MAR4, hashes[1]);
+ if (h != 0)
+ rcr |= URL_RCR_AM; /* activate mcast hash filter */
+ url_csr_write_4(un, URL_MAR0, mchash[0]);
+ url_csr_write_4(un, URL_MAR4, mchash[1]);
+ update:
+ url_csr_write_2(un, URL_RCR, rcr);
}
static unsigned
@@ -601,7 +576,7 @@
switch (cmd) {
case SIOCADDMULTI:
case SIOCDELMULTI:
- url_setiff_locked(un);
+ url_rcvfilt_locked(un);
break;
default:
break;
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