* [PATCH v2] net/cadence_gem: Updating the GEM MAC IP to properly filter out multicast addresses.
@ 2019-11-29 8:52 bilalwasim676
2019-11-29 9:13 ` Edgar E. Iglesias
0 siblings, 1 reply; 3+ messages in thread
From: bilalwasim676 @ 2019-11-29 8:52 UTC (permalink / raw)
To: qemu-devel; +Cc: edgar.iglesias, qemu-arm, bilal_wasim, alistair, peter.maydell
From: bwasim <bilal_wasim@mentor.com>
The current code makes a bad assumption that the most-significant byte
of the MAC address is used to determine if the address is multicast or
unicast, but in reality only a single bit is used to determine this.
This caused IPv6 to not work.. Fix is now in place and has been tested
with ZCU102-A53 / IPv6 on a TAP interface. Works well..
Signed-off-by: Bilal Wasim <bilal_wasim@mentor.com>
---
hw/net/cadence_gem.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c
index b8be73dc55..042188c1ba 100644
--- a/hw/net/cadence_gem.c
+++ b/hw/net/cadence_gem.c
@@ -34,6 +34,7 @@
#include "qemu/module.h"
#include "sysemu/dma.h"
#include "net/checksum.h"
+#include "net/eth.h"
#ifdef CADENCE_GEM_ERR_DEBUG
#define DB_PRINT(...) do { \
@@ -601,7 +602,7 @@ static void gem_receive_updatestats(CadenceGEMState *s, const uint8_t *packet,
}
/* Error-free Multicast Frames counter */
- if (packet[0] == 0x01) {
+ if (is_multicast_ether_addr(packet)) {
s->regs[GEM_RXMULTICNT]++;
}
@@ -690,21 +691,25 @@ static int gem_mac_address_filter(CadenceGEMState *s, const uint8_t *packet)
}
/* Accept packets -w- hash match? */
- if ((packet[0] == 0x01 && (s->regs[GEM_NWCFG] & GEM_NWCFG_MCAST_HASH)) ||
- (packet[0] != 0x01 && (s->regs[GEM_NWCFG] & GEM_NWCFG_UCAST_HASH))) {
+ if ((is_multicast_ether_addr(packet)
+ && (s->regs[GEM_NWCFG] & GEM_NWCFG_MCAST_HASH)) ||
+ (is_unicast_ether_addr(packet)
+ && (s->regs[GEM_NWCFG] & GEM_NWCFG_UCAST_HASH))) {
unsigned hash_index;
hash_index = calc_mac_hash(packet);
if (hash_index < 32) {
if (s->regs[GEM_HASHLO] & (1<<hash_index)) {
- return packet[0] == 0x01 ? GEM_RX_MULTICAST_HASH_ACCEPT :
- GEM_RX_UNICAST_HASH_ACCEPT;
+ return is_multicast_ether_addr(packet) ?
+ GEM_RX_MULTICAST_HASH_ACCEPT :
+ GEM_RX_UNICAST_HASH_ACCEPT;
}
} else {
hash_index -= 32;
if (s->regs[GEM_HASHHI] & (1<<hash_index)) {
- return packet[0] == 0x01 ? GEM_RX_MULTICAST_HASH_ACCEPT :
- GEM_RX_UNICAST_HASH_ACCEPT;
+ return is_multicast_ether_addr(packet) ?
+ GEM_RX_MULTICAST_HASH_ACCEPT :
+ GEM_RX_UNICAST_HASH_ACCEPT;
}
}
}
--
2.19.1.windows.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] net/cadence_gem: Updating the GEM MAC IP to properly filter out multicast addresses.
2019-11-29 8:52 [PATCH v2] net/cadence_gem: Updating the GEM MAC IP to properly filter out multicast addresses bilalwasim676
@ 2019-11-29 9:13 ` Edgar E. Iglesias
2019-11-29 9:32 ` Bilal Wasim
0 siblings, 1 reply; 3+ messages in thread
From: Edgar E. Iglesias @ 2019-11-29 9:13 UTC (permalink / raw)
To: bilalwasim676; +Cc: peter.maydell, qemu-arm, bilal_wasim, qemu-devel, alistair
On Fri, Nov 29, 2019 at 01:52:16PM +0500, bilalwasim676@gmail.com wrote:
> From: bwasim <bilal_wasim@mentor.com>
>
> The current code makes a bad assumption that the most-significant byte
> of the MAC address is used to determine if the address is multicast or
> unicast, but in reality only a single bit is used to determine this.
> This caused IPv6 to not work.. Fix is now in place and has been tested
> with ZCU102-A53 / IPv6 on a TAP interface. Works well..
Thanks Bilal,
Sorry, just one more thing I had missed, we need to update
gem_transmit_updatestats() aswell, in a similar way as we did with
gem_receive_updatestats().
Cheers,
Edgar
>
> Signed-off-by: Bilal Wasim <bilal_wasim@mentor.com>
> ---
> hw/net/cadence_gem.c | 19 ++++++++++++-------
> 1 file changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c
> index b8be73dc55..042188c1ba 100644
> --- a/hw/net/cadence_gem.c
> +++ b/hw/net/cadence_gem.c
> @@ -34,6 +34,7 @@
> #include "qemu/module.h"
> #include "sysemu/dma.h"
> #include "net/checksum.h"
> +#include "net/eth.h"
>
> #ifdef CADENCE_GEM_ERR_DEBUG
> #define DB_PRINT(...) do { \
> @@ -601,7 +602,7 @@ static void gem_receive_updatestats(CadenceGEMState *s, const uint8_t *packet,
> }
>
> /* Error-free Multicast Frames counter */
> - if (packet[0] == 0x01) {
> + if (is_multicast_ether_addr(packet)) {
> s->regs[GEM_RXMULTICNT]++;
> }
>
> @@ -690,21 +691,25 @@ static int gem_mac_address_filter(CadenceGEMState *s, const uint8_t *packet)
> }
>
> /* Accept packets -w- hash match? */
> - if ((packet[0] == 0x01 && (s->regs[GEM_NWCFG] & GEM_NWCFG_MCAST_HASH)) ||
> - (packet[0] != 0x01 && (s->regs[GEM_NWCFG] & GEM_NWCFG_UCAST_HASH))) {
> + if ((is_multicast_ether_addr(packet)
> + && (s->regs[GEM_NWCFG] & GEM_NWCFG_MCAST_HASH)) ||
> + (is_unicast_ether_addr(packet)
> + && (s->regs[GEM_NWCFG] & GEM_NWCFG_UCAST_HASH))) {
> unsigned hash_index;
>
> hash_index = calc_mac_hash(packet);
> if (hash_index < 32) {
> if (s->regs[GEM_HASHLO] & (1<<hash_index)) {
> - return packet[0] == 0x01 ? GEM_RX_MULTICAST_HASH_ACCEPT :
> - GEM_RX_UNICAST_HASH_ACCEPT;
> + return is_multicast_ether_addr(packet) ?
> + GEM_RX_MULTICAST_HASH_ACCEPT :
> + GEM_RX_UNICAST_HASH_ACCEPT;
> }
> } else {
> hash_index -= 32;
> if (s->regs[GEM_HASHHI] & (1<<hash_index)) {
> - return packet[0] == 0x01 ? GEM_RX_MULTICAST_HASH_ACCEPT :
> - GEM_RX_UNICAST_HASH_ACCEPT;
> + return is_multicast_ether_addr(packet) ?
> + GEM_RX_MULTICAST_HASH_ACCEPT :
> + GEM_RX_UNICAST_HASH_ACCEPT;
> }
> }
> }
> --
> 2.19.1.windows.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] net/cadence_gem: Updating the GEM MAC IP to properly filter out multicast addresses.
2019-11-29 9:13 ` Edgar E. Iglesias
@ 2019-11-29 9:32 ` Bilal Wasim
0 siblings, 0 replies; 3+ messages in thread
From: Bilal Wasim @ 2019-11-29 9:32 UTC (permalink / raw)
To: Edgar E. Iglesias
Cc: peter.maydell, qemu-arm, bilal_wasim, qemu-devel, alistair
[-- Attachment #1: Type: text/plain, Size: 3264 bytes --]
Thanks, Will do..
On Fri, 29 Nov 2019, 14:13 Edgar E. Iglesias, <edgar.iglesias@gmail.com>
wrote:
> On Fri, Nov 29, 2019 at 01:52:16PM +0500, bilalwasim676@gmail.com wrote:
> > From: bwasim <bilal_wasim@mentor.com>
> >
> > The current code makes a bad assumption that the most-significant byte
> > of the MAC address is used to determine if the address is multicast or
> > unicast, but in reality only a single bit is used to determine this.
> > This caused IPv6 to not work.. Fix is now in place and has been tested
> > with ZCU102-A53 / IPv6 on a TAP interface. Works well..
>
> Thanks Bilal,
>
> Sorry, just one more thing I had missed, we need to update
> gem_transmit_updatestats() aswell, in a similar way as we did with
> gem_receive_updatestats().
>
> Cheers,
> Edgar
>
>
> >
> > Signed-off-by: Bilal Wasim <bilal_wasim@mentor.com>
> > ---
> > hw/net/cadence_gem.c | 19 ++++++++++++-------
> > 1 file changed, 12 insertions(+), 7 deletions(-)
> >
> > diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c
> > index b8be73dc55..042188c1ba 100644
> > --- a/hw/net/cadence_gem.c
> > +++ b/hw/net/cadence_gem.c
> > @@ -34,6 +34,7 @@
> > #include "qemu/module.h"
> > #include "sysemu/dma.h"
> > #include "net/checksum.h"
> > +#include "net/eth.h"
> >
> > #ifdef CADENCE_GEM_ERR_DEBUG
> > #define DB_PRINT(...) do { \
> > @@ -601,7 +602,7 @@ static void gem_receive_updatestats(CadenceGEMState
> *s, const uint8_t *packet,
> > }
> >
> > /* Error-free Multicast Frames counter */
> > - if (packet[0] == 0x01) {
> > + if (is_multicast_ether_addr(packet)) {
> > s->regs[GEM_RXMULTICNT]++;
> > }
> >
> > @@ -690,21 +691,25 @@ static int gem_mac_address_filter(CadenceGEMState
> *s, const uint8_t *packet)
> > }
> >
> > /* Accept packets -w- hash match? */
> > - if ((packet[0] == 0x01 && (s->regs[GEM_NWCFG] &
> GEM_NWCFG_MCAST_HASH)) ||
> > - (packet[0] != 0x01 && (s->regs[GEM_NWCFG] &
> GEM_NWCFG_UCAST_HASH))) {
> > + if ((is_multicast_ether_addr(packet)
> > + && (s->regs[GEM_NWCFG] & GEM_NWCFG_MCAST_HASH)) ||
> > + (is_unicast_ether_addr(packet)
> > + && (s->regs[GEM_NWCFG] & GEM_NWCFG_UCAST_HASH))) {
> > unsigned hash_index;
> >
> > hash_index = calc_mac_hash(packet);
> > if (hash_index < 32) {
> > if (s->regs[GEM_HASHLO] & (1<<hash_index)) {
> > - return packet[0] == 0x01 ? GEM_RX_MULTICAST_HASH_ACCEPT
> :
> > - GEM_RX_UNICAST_HASH_ACCEPT;
> > + return is_multicast_ether_addr(packet) ?
> > + GEM_RX_MULTICAST_HASH_ACCEPT :
> > + GEM_RX_UNICAST_HASH_ACCEPT;
> > }
> > } else {
> > hash_index -= 32;
> > if (s->regs[GEM_HASHHI] & (1<<hash_index)) {
> > - return packet[0] == 0x01 ? GEM_RX_MULTICAST_HASH_ACCEPT
> :
> > - GEM_RX_UNICAST_HASH_ACCEPT;
> > + return is_multicast_ether_addr(packet) ?
> > + GEM_RX_MULTICAST_HASH_ACCEPT :
> > + GEM_RX_UNICAST_HASH_ACCEPT;
> > }
> > }
> > }
> > --
> > 2.19.1.windows.1
> >
>
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2019-11-29 8:52 [PATCH v2] net/cadence_gem: Updating the GEM MAC IP to properly filter out multicast addresses bilalwasim676
2019-11-29 9:13 ` Edgar E. Iglesias
2019-11-29 9:32 ` Bilal Wasim
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