diff options
| author | Edward Cree <ecree.xilinx@gmail.com> | 2022-11-14 13:15:53 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-16 09:07:02 +0000 |
| commit | 36df6136a7d0a32f6b7e5862aeef4702b8b087d2 (patch) | |
| tree | 0669058cf11540b58ad548f2c5723a0489ff4d3d | |
| parent | 85697f97fd3cdb1766ba53ac2d129bbc34e6df98 (diff) | |
| download | linux-36df6136a7d0a32f6b7e5862aeef4702b8b087d2.tar.bz2 | |
sfc: add ability for extra channels to receive raw RX buffers
The TC extra channel will need its own special RX handling, which must
operate before any code that expects the RX buffer to contain a network
packet; buffers on this RX queue contain MAE counter packets in a
special format that does not resemble an Ethernet frame, and many fields
of the RX packet prefix are not populated.
The USER_MARK field, however, is populated with the generation count from
the counter subsystem, which needs to be passed on to the RX handler.
Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/sfc/ef100_rx.c | 7 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/net_driver.h | 2 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/ef100_rx.c b/drivers/net/ethernet/sfc/ef100_rx.c index 735f50385919..83d9db71d7d7 100644 --- a/drivers/net/ethernet/sfc/ef100_rx.c +++ b/drivers/net/ethernet/sfc/ef100_rx.c @@ -67,6 +67,13 @@ void __ef100_rx_packet(struct efx_channel *channel) prefix = (u32 *)(eh - ESE_GZ_RX_PKT_PREFIX_LEN); + if (channel->type->receive_raw) { + u32 mark = PREFIX_FIELD(prefix, USER_MARK); + + if (channel->type->receive_raw(rx_queue, mark)) + return; /* packet was consumed */ + } + if (ef100_has_fcs_error(channel, prefix) && unlikely(!(efx->net_dev->features & NETIF_F_RXALL))) goto out; diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h index b3d413896230..1e42f3447b24 100644 --- a/drivers/net/ethernet/sfc/net_driver.h +++ b/drivers/net/ethernet/sfc/net_driver.h @@ -593,6 +593,7 @@ struct efx_msi_context { * @copy: Copy the channel state prior to reallocation. May be %NULL if * reallocation is not supported. * @receive_skb: Handle an skb ready to be passed to netif_receive_skb() + * @receive_raw: Handle an RX buffer ready to be passed to __efx_rx_packet() * @want_txqs: Determine whether this channel should have TX queues * created. If %NULL, TX queues are not created. * @keep_eventq: Flag for whether event queue should be kept initialised @@ -609,6 +610,7 @@ struct efx_channel_type { void (*get_name)(struct efx_channel *, char *buf, size_t len); struct efx_channel *(*copy)(const struct efx_channel *); bool (*receive_skb)(struct efx_channel *, struct sk_buff *); + bool (*receive_raw)(struct efx_rx_queue *, u32); bool (*want_txqs)(struct efx_channel *); bool keep_eventq; bool want_pio; |