diff options
| author | Edward Cree <ecree@solarflare.com> | 2020-09-11 23:39:39 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-11 17:15:22 -0700 |
| commit | fe0c4060c1b90fabfcab387dc374edde420a98d6 (patch) | |
| tree | 372b9f08986281be4e2017274451693ad7a7bb64 | |
| parent | 85d43fdb57919b044e5f4a0ee0c92ff419cf21d5 (diff) | |
| download | lwn-fe0c4060c1b90fabfcab387dc374edde420a98d6.tar.gz lwn-fe0c4060c1b90fabfcab387dc374edde420a98d6.zip | |
sfc: select inner-csum-offload TX queues for skbs that need it
Won't actually be exercised until we start advertising the corresponding
offload features.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/sfc/ptp.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tx.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tx.h | 26 |
3 files changed, 29 insertions, 2 deletions
diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c index bd99517f06db..2e8c4569f03b 100644 --- a/drivers/net/ethernet/sfc/ptp.c +++ b/drivers/net/ethernet/sfc/ptp.c @@ -43,6 +43,7 @@ #include "mcdi_pcol.h" #include "io.h" #include "farch_regs.h" +#include "tx.h" #include "nic.h" /* indirectly includes ptp.h */ /* Maximum number of events expected to make up a PTP event */ @@ -1081,8 +1082,8 @@ static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings) /* Transmit a PTP packet via the dedicated hardware timestamped queue. */ static void efx_ptp_xmit_skb_queue(struct efx_nic *efx, struct sk_buff *skb) { - u8 type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OUTER_CSUM : 0; struct efx_ptp_data *ptp_data = efx->ptp_data; + u8 type = efx_tx_csum_type_skb(skb); struct efx_tx_queue *tx_queue; tx_queue = efx_channel_get_tx_queue(ptp_data->channel, type); diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c index bb3b41f9f9c0..13e960b23de8 100644 --- a/drivers/net/ethernet/sfc/tx.c +++ b/drivers/net/ethernet/sfc/tx.c @@ -506,7 +506,7 @@ netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, EFX_WARN_ON_PARANOID(!netif_device_present(net_dev)); index = skb_get_queue_mapping(skb); - type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OUTER_CSUM : 0; + type = efx_tx_csum_type_skb(skb); if (index >= efx->n_tx_channels) { index -= efx->n_tx_channels; type |= EFX_TXQ_TYPE_HIGHPRI; diff --git a/drivers/net/ethernet/sfc/tx.h b/drivers/net/ethernet/sfc/tx.h index a3cf06c5570d..f2c4d2f89919 100644 --- a/drivers/net/ethernet/sfc/tx.h +++ b/drivers/net/ethernet/sfc/tx.h @@ -18,4 +18,30 @@ unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue, u8 *efx_tx_get_copy_buffer_limited(struct efx_tx_queue *tx_queue, struct efx_tx_buffer *buffer, size_t len); +/* What TXQ type will satisfy the checksum offloads required for this skb? */ +static inline unsigned int efx_tx_csum_type_skb(struct sk_buff *skb) +{ + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; /* no checksum offload */ + + if (skb->encapsulation && + skb_checksum_start_offset(skb) == skb_inner_transport_offset(skb)) { + /* we only advertise features for IPv4 and IPv6 checksums on + * encapsulated packets, so if the checksum is for the inner + * packet, it must be one of them; no further checking required. + */ + + /* Do we also need to offload the outer header checksum? */ + if (skb_shinfo(skb)->gso_segs > 1 && + !(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) && + (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM)) + return EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM; + return EFX_TXQ_TYPE_INNER_CSUM; + } + + /* similarly, we only advertise features for IPv4 and IPv6 checksums, + * so it must be one of them. No need for further checks. + */ + return EFX_TXQ_TYPE_OUTER_CSUM; +} #endif /* EFX_TX_H */ |