Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

add rnd(4) hooks. Note that interrupts on bge hardware may occur

Browse Source 
with certain patterns, especially when the interrupt mitigation
logic kicks in. So this might be a very weak entropy source.
This commit is contained in:
mlelstv 2008-06-17 06:08:46 +00:00
parent f1f0ceb1ae
commit 2f1d68867c
2 changed files with 26 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
sys/dev/pci/if_bge.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: if_bge.c,v 1.147 2008/06/17 06:04:07 mlelstv Exp $ */
/* $NetBSD: if_bge.c,v 1.148 2008/06/17 06:08:46 mlelstv Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
@ -79,10 +79,11 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.147 2008/06/17 06:04:07 mlelstv Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.148 2008/06/17 06:08:46 mlelstv Exp $");
#include "bpfilter.h"
#include "vlan.h"
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
@ -100,6 +101,10 @@ __KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.147 2008/06/17 06:04:07 mlelstv Exp $")
#include <net/if_media.h>
#include <net/if_ether.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
@ -2745,6 +2750,10 @@ bge_attach(device_t parent, device_t self, void *aux)
if_attach(ifp);
DPRINTFN(5, ("ether_ifattach\n"));
ether_ifattach(ifp, eaddr);
#if NRND > 0
rnd_attach_source(&sc->rnd_source, device_xname(sc->bge_dev),
RND_TYPE_NET, 0);
#endif
#ifdef BGE_EVENT_COUNTERS
/*
* Attach event counters.
@ -2971,6 +2980,11 @@ bge_rxeof(struct bge_softc *sc)
tosync = sc->bge_rdata->bge_status_block.bge_idx[0].bge_rx_prod_idx -
sc->bge_rx_saved_considx;
#if NRND > 0
if (tosync != 0 && RND_ENABLED(&sc->rnd_source))
rnd_add_uint32(&sc->rnd_source, tosync);
#endif
toff = offset + (sc->bge_rx_saved_considx * sizeof (struct bge_rx_bd));
if (tosync < 0) {
@ -3124,6 +3138,11 @@ bge_txeof(struct bge_softc *sc)
tosync = sc->bge_rdata->bge_status_block.bge_idx[0].bge_tx_cons_idx -
sc->bge_tx_saved_considx;
#if NRND > 0
if (tosync != 0 && RND_ENABLED(&sc->rnd_source))
rnd_add_uint32(&sc->rnd_source, tosync);
#endif
toff = offset + (sc->bge_tx_saved_considx * sizeof (struct bge_tx_bd));
if (tosync < 0) {

6
sys/dev/pci/if_bgereg.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: if_bgereg.h,v 1.45 2007/12/09 20:28:08 jmcneill Exp $ */
/* $NetBSD: if_bgereg.h,v 1.46 2008/06/17 06:12:10 mlelstv Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
* Copyright (c) 1997, 1998, 1999, 2001
@ -2439,4 +2439,8 @@ struct bge_softc {
int bge_pending_rxintr_change;
SLIST_HEAD(, txdmamap_pool_entry) txdma_list;
struct txdmamap_pool_entry *txdma[BGE_TX_RING_CNT];
#if NRND > 0
rndsource_element_t rnd_source; /* random source */
#endif
};