diff mbox

[dpdk-dev,RESEND,v2] net/i40e: fix floating VEB issue

Message ID 1478252000-11455-1-git-send-email-yuanhan.liu@linux.intel.com (mailing list archive)
State Superseded, archived
Headers

Checks

Context Check Description
tmonjalo/checkpatch success coding style OK

Commit Message

Yuanhan Liu Nov. 4, 2016, 9:33 a.m. UTC 
  Turning off S-TAG identification will impact floating VEB,
VFs can't communicate with each other.
This patch fixes this issue by judging whether floating
VEB is enabled, S-TAG identification will be turned off
only when floating VEB is disabled.

Fixes: 4d61120d5ce7 ("net/i40e: fix dropping packets with ethertype 0x88A8")

Signed-off-by: Beilei Xing <beilei.xing@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>
---
 v2 changes:
 * Modify the limitation description in i40e.rst

 Seems that Beilei failed to send this patches out; while I have sent out few
 patches out successfully. I'm sending it for her.

 doc/guides/nics/i40e.rst       |  6 ++++++
 drivers/net/i40e/i40e_ethdev.c | 12 +++++++-----
 2 files changed, 13 insertions(+), 5 deletions(-)

Comments

Yuanhan Liu Nov. 4, 2016, 11:01 a.m. UTC | #1 
On Fri, Nov 04, 2016 at 05:33:20PM +0800, Yuanhan Liu wrote:
> Turning off S-TAG identification will impact floating VEB,
> VFs can't communicate with each other.
> This patch fixes this issue by judging whether floating
> VEB is enabled, S-TAG identification will be turned off
> only when floating VEB is disabled.
> 
> Fixes: 4d61120d5ce7 ("net/i40e: fix dropping packets with ethertype 0x88A8")
> 
> Signed-off-by: Beilei Xing <beilei.xing@intel.com>
> Acked-by: Jingjing Wu <jingjing.wu@intel.com>
> ---
>  v2 changes:
>  * Modify the limitation description in i40e.rst
> 
>  Seems that Beilei failed to send this patches out; while I have sent out few
>  patches out successfully. I'm sending it for her.

Please ignore this patch. The original patch is with wrong format, that
it turns the authorship to me. I will resend another one soon.

	--yliu
diff mbox

Patch

diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst
index c0163fc..5780268 100644
--- a/doc/guides/nics/i40e.rst
+++ b/doc/guides/nics/i40e.rst
@@ -453,3 +453,9 @@  To work around this issue, ``ethtool -s <dev> autoneg on`` should be
 set first and then the link can be brought up through ``ifconfig <dev> up``.
 
 NOTE: requires Linux kernel i40e driver version >= 1.4.X
+
+Receive packets with Ethertype 0x88A8
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Due to the FW limitation, PF can receive packets with Ethertype 0x88A8
+only when floating VEB is disabled.
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index bb81b15..631a93f 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -1121,11 +1121,13 @@  eth_i40e_dev_init(struct rte_eth_dev *dev)
 	/* Disable double vlan by default */
 	i40e_vsi_config_double_vlan(vsi, FALSE);
 
-	/* Disable S-TAG identification by default */
-	ret = I40E_READ_REG(hw, I40E_PRT_L2TAGSEN);
-	if (ret & I40E_L2_TAGS_S_TAG_MASK) {
-		ret &= ~I40E_L2_TAGS_S_TAG_MASK;
-		I40E_WRITE_REG(hw, I40E_PRT_L2TAGSEN, ret);
+	/* Disable S-TAG identification when floating_veb is disabled */
+	if (!pf->floating_veb) {
+		ret = I40E_READ_REG(hw, I40E_PRT_L2TAGSEN);
+		if (ret & I40E_L2_TAGS_S_TAG_MASK) {
+			ret &= ~I40E_L2_TAGS_S_TAG_MASK;
+			I40E_WRITE_REG(hw, I40E_PRT_L2TAGSEN, ret);
+		}
 	}
 
 	if (!vsi->max_macaddrs)