diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mvme3100/network/if_tsec_pub.h')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mvme3100/network/if_tsec_pub.h | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/c/src/lib/libbsp/powerpc/mvme3100/network/if_tsec_pub.h b/c/src/lib/libbsp/powerpc/mvme3100/network/if_tsec_pub.h index 0a7760d0c1..79846b0093 100644 --- a/c/src/lib/libbsp/powerpc/mvme3100/network/if_tsec_pub.h +++ b/c/src/lib/libbsp/powerpc/mvme3100/network/if_tsec_pub.h @@ -182,36 +182,52 @@ BSP_tsec_init_hw(struct tsec_private *mp, int promisc, unsigned char *enaddr); * Clear multicast hash filter. No multicast frames are accepted * after executing this routine (unless the hardware was initialized * in 'promiscuous' mode). + * + * Reset reference count for all hash-table entries + * to zero (see BSP_tsec_mcast_filter_accept_del()). */ void BSP_tsec_mcast_filter_clear(struct tsec_private *mp); /* * Program multicast filter to accept all multicast frames. + * + * Increment reference count for all hash-table entries + * by one (see BSP_tsec_mcast_filter_accept_del()). */ void BSP_tsec_mcast_filter_accept_all(struct tsec_private *mp); /* - * Add a MAC address to the multicast filter. + * Add a MAC address to the multicast filter and increment + * the reference count for the matching hash-table entry + * (see BSP_tsec_mcast_filter_accept_del()). + * * Existing entries are not changed but note that * the filter is imperfect, i.e., multiple MAC addresses * may alias to a single filter entry. Hence software * filtering must still be performed. * - * NOTE: Deletion of an address is not possible. This is - * usually accomplished by a higher-level driver - * maintaining a list/database of multicast addresses - * and going through a sequence: - * - * BSP_tsec_mcast_filter_clear() - * forall mcast addresses do - * BSP_tsec_mcast_filter_accept_add() */ void BSP_tsec_mcast_filter_accept_add(struct tsec_private *mp, unsigned char *enaddr); /* + * Remove a MAC address from the (imperfec) multicast + * filter. + * Note that the driver maintains an internal reference + * counter for each multicast hash. The hash-table + * entry is only cleared when the reference count + * reaches zero ('del' has been called the same + * amount of times as 'add' for an address (or + * any alias) that matches a given table entry. + * BSP_tsec_mcast_filter_clear() resets all reference + * counters to zero. + */ +void +BSP_tsec_mcast_filter_accept_del(struct tsec_private *mp, unsigned char *enaddr); + +/* * Dump statistics to FILE 'f'. If NULL, stdout is used. */ void |