[PATCH net] net: hns: Fix the process of adding broadcast addresses to tcam

[PATCH net] net: hns: Fix the process of adding broadcast addresses to tcam

[Salil Mehta]

From: Xi Wang <wangxi11@huawei.com>

If the multicast mask value in device tree is configured not all
0xff, the broadcast mac will be lost from tcam table after the
execution of command 'ifconfig up'. The address is appended by
hns_ae_start, but will be clear later by hns_nic_set_rx_mode
called in dev_open process.

This patch fixed it by not use the multicast mask when add a
broadcast address.

Fixes: b5996f11ea54 ("net: add Hisilicon Network Subsystem basic ethernet support")
Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c | 23 +++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
index e0bc79e..a09a071c 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
@@ -1648,6 +1648,15 @@ int hns_dsaf_rm_mac_addr(
 				      mac_entry->addr);
 }
 
+static void hns_dsaf_setup_mc_mask(struct dsaf_device *dsaf_dev,
+						u8 port_num, u8 *mask, u8 *addr)
+{
+	if (MAC_IS_BROADCAST(addr))
+		memset(mask, 0xff, ETH_ALEN);
+	else
+		memcpy(mask, dsaf_dev->mac_cb[port_num]->mc_mask, ETH_ALEN);
+}
+
 static void hns_dsaf_mc_mask_bit_clear(char *dst, const char *src)
 {
 	u16 *a = (u16 *)dst;
@@ -1676,7 +1685,6 @@ int hns_dsaf_add_mac_mc_port(struct dsaf_device *dsaf_dev,
 	struct dsaf_drv_tbl_tcam_key tmp_mac_key;
 	struct dsaf_tbl_tcam_data tcam_data;
 	u8 mc_addr[ETH_ALEN];
-	u8 *mc_mask;
 	int mskid;
 
 	/*chechk mac addr */
@@ -1687,9 +1695,12 @@ int hns_dsaf_add_mac_mc_port(struct dsaf_device *dsaf_dev,
 	}
 
 	ether_addr_copy(mc_addr, mac_entry->addr);
-	mc_mask = dsaf_dev->mac_cb[mac_entry->in_port_num]->mc_mask;
 	if (!AE_IS_VER1(dsaf_dev->dsaf_ver)) {
+		u8 mc_mask[ETH_ALEN];
+
 		/* prepare for key data setting */
+		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
+			mc_mask, mac_entry->addr);
 		hns_dsaf_mc_mask_bit_clear(mc_addr, mc_mask);
 
 		/* config key mask */
@@ -1844,7 +1855,6 @@ int hns_dsaf_del_mac_mc_port(struct dsaf_device *dsaf_dev,
 	struct dsaf_drv_tbl_tcam_key mask_key, tmp_mac_key;
 	struct dsaf_tbl_tcam_data *pmask_key = NULL;
 	u8 mc_addr[ETH_ALEN];
-	u8 *mc_mask;
 
 	if (!(void *)mac_entry) {
 		dev_err(dsaf_dev->dev,
@@ -1861,14 +1871,17 @@ int hns_dsaf_del_mac_mc_port(struct dsaf_device *dsaf_dev,
 
 	/* always mask vlan_id field */
 	ether_addr_copy(mc_addr, mac_entry->addr);
-	mc_mask = dsaf_dev->mac_cb[mac_entry->in_port_num]->mc_mask;
 
 	if (!AE_IS_VER1(dsaf_dev->dsaf_ver)) {
+		u8 mc_mask[ETH_ALEN];
+
 		/* prepare for key data setting */
+		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
+			mc_mask, mac_entry->addr);
 		hns_dsaf_mc_mask_bit_clear(mc_addr, mc_mask);
 
 		/* config key mask */
-		hns_dsaf_set_mac_key(dsaf_dev, &mask_key, 0x00, 0xff, mc_addr);
+		hns_dsaf_set_mac_key(dsaf_dev, &mask_key, 0x00, 0xff, mc_mask);
 
 		mask_key.high.val = le32_to_cpu(mask_key.high.val);
 		mask_key.low.val = le32_to_cpu(mask_key.low.val);
-- 
2.7.4

Re: [PATCH net] net: hns: Fix the process of adding broadcast addresses to tcam

[David Miller]

From: Salil Mehta <salil.mehta@huawei.com>
Date: Fri, 1 Jun 2018 18:00:11 +0100

> +		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
> +			mc_mask, mac_entry->addr);

Please indent things properly when arguments span multiple lines.

The second line here should be precisely after the opennning parenthesis
of the previous line.

> +		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
> +			mc_mask, mac_entry->addr);

Likewise.

RE: [PATCH net] net: hns: Fix the process of adding broadcast addresses to tcam

[Salil Mehta]

Hi Dave,
Thanks for pointing out. Will fix them.

Best regards
Salil

> -----Original Message-----
> From: David Miller [mailto:davem@davemloft.net]
> Sent: Monday, June 04, 2018 4:36 PM
> To: Salil Mehta <salil.mehta@huawei.com>
> Cc: Zhuangyuzeng (Yisen) <yisen.zhuang@huawei.com>; lipeng (Y)
> <lipeng321@huawei.com>; mehta.salil@opnsrc.net; netdev@vger.kernel.org;
> linux-kernel@vger.kernel.org; Linuxarm <linuxarm@huawei.com>; wangxi
> (M) <wangxi11@huawei.com>
> Subject: Re: [PATCH net] net: hns: Fix the process of adding broadcast
> addresses to tcam
> 
> From: Salil Mehta <salil.mehta@huawei.com>
> Date: Fri, 1 Jun 2018 18:00:11 +0100
> 
> > +		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
> > +			mc_mask, mac_entry->addr);
> 
> Please indent things properly when arguments span multiple lines.
> 
> The second line here should be precisely after the opennning
> parenthesis
> of the previous line.
> 
> > +		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
> > +			mc_mask, mac_entry->addr);
> 
> Likewise.