diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/tx.c')
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 65 |
1 files changed, 57 insertions, 8 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c index 147f8df3053d..6fa2c12f7955 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c @@ -39,11 +39,10 @@ iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, #define OPT_HDR(type, skb, off) \ (type *)(skb_network_header(skb) + (off)) -static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, - struct ieee80211_hdr *hdr, - struct ieee80211_tx_info *info, - bool amsdu) +static u16 iwl_mvm_tx_csum_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb, + struct ieee80211_tx_info *info, bool amsdu) { + struct ieee80211_hdr *hdr = (void *)skb->data; u16 offload_assist = 0; #if IS_ENABLED(CONFIG_INET) u16 mh_len = ieee80211_hdrlen(hdr->frame_control); @@ -141,6 +140,54 @@ out: return offload_assist; } +u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu) +{ + struct ieee80211_hdr *hdr = (void *)skb->data; + u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM; + unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); + unsigned int csum_start = skb_checksum_start_offset(skb); + + offload_assist |= u32_encode_bits(hdrlen / 2, + IWL_TX_CMD_OFFLD_BZ_MH_LEN); + if (amsdu) + offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU; + else if (hdrlen % 4) + /* padding is inserted later in transport */ + offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return offload_assist; + + offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM | + IWL_TX_CMD_OFFLD_BZ_ZERO2ONES; + + /* + * mac80211 will always calculate checksum in software for + * non-fast-xmit, and so we can only do offloaded checksum + * for fast-xmit frames. In this case, we always have the + * RFC 1042 header present. skb_checksum_start_offset() + * returns the offset from the beginning, but the hardware + * needs it from after the header & SNAP header. + */ + csum_start -= hdrlen + 8; + + offload_assist |= u32_encode_bits(csum_start, + IWL_TX_CMD_OFFLD_BZ_START_OFFS); + offload_assist |= u32_encode_bits(csum_start + skb->csum_offset, + IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS); + + return offload_assist; +} + +static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, + struct ieee80211_tx_info *info, + bool amsdu) +{ + if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ) + return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu); + return iwl_mvm_tx_csum_bz(mvm, skb, amsdu); +} + /* * Sets most of the Tx cmd's fields */ @@ -240,7 +287,7 @@ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, tx_cmd->sta_id = sta_id; tx_cmd->offload_assist = - cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, amsdu)); + cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu)); } static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, @@ -462,7 +509,6 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, dev_cmd->hdr.cmd = TX_CMD; if (iwl_mvm_has_new_tx_api(mvm)) { - u16 offload_assist; u32 rate_n_flags = 0; u16 flags = 0; struct iwl_mvm_sta *mvmsta = sta ? @@ -475,8 +521,6 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; } - offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, amsdu); - if (!info->control.hw_key) flags |= IWL_TX_FLAGS_ENCRYPT_DIS; @@ -496,6 +540,8 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; + u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, + info, amsdu); cmd->offload_assist = cpu_to_le32(offload_assist); @@ -509,6 +555,9 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, cmd->rate_n_flags = cpu_to_le32(rate_n_flags); } else { struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; + u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb, + info, + amsdu); cmd->offload_assist = cpu_to_le16(offload_assist); |