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ibmvnic: Insert header on VLAN tagged received frame

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This patch addresses a modification in the PAPR+ specification which now
defines a previously reserved value for vNIC capabilities. It indicates
whether the system firmware performs a VLAN header stripping on all VLAN
tagged received frames, in case it does, the behavior expected is for
the ibmvnic driver to be responsible for inserting the VLAN header.

Reported-by: Manvanthara B. Puttashankar <mputtash@in.ibm.com>
Signed-off-by: Murilo Fossa Vicentini <muvic@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Murilo Fossa Vicentini 2017-04-21 15:38:46 -04:00 committed by David S. Miller
parent 7f3c6e6b90
commit 6052d5e2a1
2 changed files with 22 additions and 1 deletions
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21
drivers/net/ethernet/ibm/ibmvnic.c
View File

@ -74,6 +74,7 @@
#include <linux/uaccess.h>
#include <asm/firmware.h>
#include <linux/workqueue.h>
#include <linux/if_vlan.h>
#include "ibmvnic.h"
@ -1105,7 +1106,15 @@ restart_poll:
skb = rx_buff->skb;
skb_copy_to_linear_data(skb, rx_buff->data + offset,
length);
skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
/* VLAN Header has been stripped by the system firmware and
* needs to be inserted by the driver
*/
if (adapter->rx_vlan_header_insertion &&
(flags & IBMVNIC_VLAN_STRIPPED))
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
ntohs(next->rx_comp.vlan_tci));
/* free the entry */
next->rx_comp.first = 0;
remove_buff_from_pool(adapter, rx_buff);
@ -2170,6 +2179,10 @@ static void send_cap_queries(struct ibmvnic_adapter *adapter)
atomic_inc(&adapter->running_cap_crqs);
ibmvnic_send_crq(adapter, &crq);
crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
atomic_inc(&adapter->running_cap_crqs);
ibmvnic_send_crq(adapter, &crq);
crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
atomic_inc(&adapter->running_cap_crqs);
ibmvnic_send_crq(adapter, &crq);
@ -2719,6 +2732,12 @@ static void handle_query_cap_rsp(union ibmvnic_crq *crq,
netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
adapter->vlan_header_insertion);
break;
case RX_VLAN_HEADER_INSERTION:
adapter->rx_vlan_header_insertion =
be64_to_cpu(crq->query_capability.number);
netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
adapter->rx_vlan_header_insertion);
break;
case MAX_TX_SG_ENTRIES:
adapter->max_tx_sg_entries =
be64_to_cpu(crq->query_capability.number);

2
drivers/net/ethernet/ibm/ibmvnic.h
View File

@ -733,6 +733,7 @@ enum ibmvnic_capabilities {
REQ_MTU = 21,
MAX_MULTICAST_FILTERS = 22,
VLAN_HEADER_INSERTION = 23,
RX_VLAN_HEADER_INSERTION = 24,
MAX_TX_SG_ENTRIES = 25,
RX_SG_SUPPORTED = 26,
RX_SG_REQUESTED = 27,
@ -993,6 +994,7 @@ struct ibmvnic_adapter {
u64 req_mtu;
u64 max_multicast_filters;
u64 vlan_header_insertion;
u64 rx_vlan_header_insertion;
u64 max_tx_sg_entries;
u64 rx_sg_supported;
u64 rx_sg_requested;