diff options
| author | Avri Altman <avri.altman@intel.com> | 2014-12-27 09:09:47 +0200 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-08-04 10:11:49 +0300 |
| commit | 93190fb0589f97bd603bd545459122a8f5532080 (patch) | |
| tree | 2988e694ac998cef073bfd28b4b44bb90320e387 /drivers/net/wireless/iwlwifi/mvm/rx.c | |
| parent | 869f3b15c9fba037956f642b2023fd16d9ee2f56 (diff) | |
| download | op-kernel-dev-93190fb0589f97bd603bd545459122a8f5532080.zip op-kernel-dev-93190fb0589f97bd603bd545459122a8f5532080.tar.gz | |
iwlwifi: mvm: Enable Rx Checksum hw
TCP software implementation on the host requires extensive computing
power. Offloading even some of the TCP/IP stack to the NIC might save
a significant overhead. In order to enable this feature on our hw,
we need to configure it first. Once done, we mark this capability,
to be advertised later to the OS via ieee80211_register_hw.
The driver Rx indications for TCP Checksum is integrated within the
standard Rx status. The driver responds to those indications as follows:
If the frame was tested by hw and checksum ok report CHECKSUM_UNNECESSARY.
Otherwise, report CHECKSUM_NONE.
Signed-off-by: Avri Altman <avri.altman@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/rx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/rx.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c index 73054dd..6574614 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rx.c +++ b/drivers/net/wireless/iwlwifi/mvm/rx.c @@ -61,6 +61,7 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *****************************************************************************/ +#include <linux/skbuff.h> #include "iwl-trans.h" #include "mvm.h" #include "fw-api.h" @@ -234,6 +235,19 @@ static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, return 0; } +static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, + struct sk_buff *skb, + u32 status) +{ + struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); + + if (mvmvif->features & NETIF_F_RXCSUM && + status & RX_MPDU_RES_STATUS_CSUM_DONE && + status & RX_MPDU_RES_STATUS_CSUM_OK) + skb->ip_summed = CHECKSUM_UNNECESSARY; +} + /* * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler * @@ -362,6 +376,9 @@ void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) } } + if (sta && ieee80211_is_data(hdr->frame_control)) + iwl_mvm_rx_csum(sta, skb, rx_pkt_status); + rcu_read_unlock(); /* set the preamble flag if appropriate */ |
