[src/trunk]: src/sys/dev/pci use additional MAC addresses to accept mcast

[nisimura <nisimura%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/028e88b855a1
branches:  trunk
changeset: 1005546:028e88b855a1
user:      nisimura <nisimura%NetBSD.org@localhost>
date:      Thu Dec 12 12:00:06 2019 +0000

description:
use additional MAC addresses to accept mcast

diffstat:

 sys/dev/pci/if_kse.c |  29 ++++++++++++++++++++++++-----
 1 files changed, 24 insertions(+), 5 deletions(-)

diffs (74 lines):

diff -r f70980eff65d -r 028e88b855a1 sys/dev/pci/if_kse.c
--- a/sys/dev/pci/if_kse.c      Thu Dec 12 11:47:30 2019 +0000
+++ b/sys/dev/pci/if_kse.c      Thu Dec 12 12:00:06 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_kse.c,v 1.44 2019/12/03 11:26:12 nisimura Exp $     */
+/*     $NetBSD: if_kse.c,v 1.45 2019/12/12 12:00:06 nisimura Exp $     */
 
 /*-
  * Copyright (c) 2006 The NetBSD Foundation, Inc.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_kse.c,v 1.44 2019/12/03 11:26:12 nisimura Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_kse.c,v 1.45 2019/12/12 12:00:06 nisimura Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -84,6 +84,8 @@
 #define MTR1   0x024   /* multicast table 63:32 */
 #define INTEN  0x028   /* interrupt enable */
 #define INTST  0x02c   /* interrupt status */
+#define MAAL0  0x080   /* additional MAC address 0 low */
+#define MAAH0  0x084   /* additional MAC address 0 high */
 #define MARL   0x200   /* MAC address low */
 #define MARM   0x202   /* MAC address middle */
 #define MARH   0x204   /* MAC address high */
@@ -1087,6 +1089,7 @@
        struct ethercom *ec = &sc->sc_ethercom;
        struct ifnet *ifp = &ec->ec_if;
        uint32_t crc, mchash[2];
+       int i;
 
        sc->sc_rxc &= ~(RXC_MHTE | RXC_RM | RXC_RA);
        ifp->if_flags &= ~IFF_ALLMULTI;
@@ -1096,9 +1099,12 @@
                goto update;
        }
 
-       mchash[0] = mchash[1] = crc = 0;
+       for (i = 0; i < 16; i++)
+                CSR_WRITE_4(sc, MAAH0 + i*8, 0);
+       crc = mchash[0] = mchash[1] = 0;
        ETHER_LOCK(ec);
        ETHER_FIRST_MULTI(step, ec, enm);
+       i = 0;
        while (enm != NULL) {
 #if KSE_MCASTDEBUG == 1
                printf("%s: addrs %s %s\n", __func__,
@@ -1118,9 +1124,22 @@
                        ifp->if_flags |= IFF_ALLMULTI;
                        goto update;
                }
-               crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN);
-               mchash[crc >> 31] |= 1 << ((crc >> 26) & 0x1f);
+               if (i < 16) {
+                       /* use 16 additional MAC addr to accept mcast */
+                       uint32_t addr;
+                       uint8_t *ep = enm->enm_addrlo;
+                       addr = (ep[3] << 24) | (ep[2] << 16)
+                            | (ep[1] << 8)  |  ep[0];
+                       CSR_WRITE_4(sc, MAAL0 + i*8, addr);
+                       addr = (ep[5] << 8) | ep[4] | (1U<<31);
+                       CSR_WRITE_4(sc, MAAH0 + i*8, addr);
+               } else {
+                       /* use hash table when too many */
+                       crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN);
+                       mchash[crc >> 31] |= 1 << ((crc >> 26) & 0x1f);
+               }
                ETHER_NEXT_MULTI(step, enm);
+               i++;
        }
        ETHER_UNLOCK(ec);