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Subject: Re: [Intel-wired-lan] [PATCH iwl-net 1/2] ixgbevf: stop attempting IPSEC offload on Mailbox API 1.5 X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 11/1/2024 4:05 PM, Jacob Keller wrote: > Commit 339f28964147 ("ixgbevf: Add support for new mailbox communication > between PF and VF") added support for v1.5 of the PF to VF mailbox > communication API. This commit mistakenly enabled IPSEC offload for API > v1.5. > > No implementation of the v1.5 API has support for IPSEC offload. This > offload is only supported by the Linux PF as mailbox API v1.4. In fact, the > v1.5 API is not implemented in any Linux PF. > > Attempting to enable IPSEC offload on a PF which supports v1.5 API will not > work. Only the Linux upstream ixgbe and ixgbevf support IPSEC offload, and > only as part of the v1.4 API. > > Fix the ixgbevf Linux driver to stop attempting IPSEC offload when > the mailbox API does not support it. > > The existing API design choice makes it difficult to support future API > versions, as other non-Linux hosts do not implement IPSEC offload. If we > add support for v1.5 to the Linux PF, then we lose support for IPSEC > offload. > > A full solution likely requires a new mailbox API with a proper negotiation > to check that IPSEC is actually supported by the host. > Fixes: 339f28964147 ("ixgbevf: Add support for new mailbox communication between PF and VF") > Signed-off-by: Jacob Keller > Reviewed-by: Przemek Kitszel > --- > drivers/net/ethernet/intel/ixgbevf/ipsec.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/drivers/net/ethernet/intel/ixgbevf/ipsec.c b/drivers/net/ethernet/intel/ixgbevf/ipsec.c > index 66cf17f19408..f804b35d79c7 100644 > --- a/drivers/net/ethernet/intel/ixgbevf/ipsec.c > +++ b/drivers/net/ethernet/intel/ixgbevf/ipsec.c > @@ -629,7 +629,6 @@ void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter) > > switch (adapter->hw.api_version) { > case ixgbe_mbox_api_14: > - case ixgbe_mbox_api_15: > break; > default: > return; >