diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/tx.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 80 |
1 files changed, 50 insertions, 30 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c index 16ad820ca824..e1f7a3febb50 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c @@ -596,6 +596,28 @@ static void iwl_pcie_free_tso_page(struct sk_buff *skb) } } +static void iwl_pcie_clear_cmd_in_flight(struct iwl_trans *trans) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + + lockdep_assert_held(&trans_pcie->reg_lock); + + if (trans_pcie->ref_cmd_in_flight) { + trans_pcie->ref_cmd_in_flight = false; + IWL_DEBUG_RPM(trans, "clear ref_cmd_in_flight - unref\n"); + iwl_trans_pcie_unref(trans); + } + + if (!trans->cfg->base_params->apmg_wake_up_wa) + return; + if (WARN_ON(!trans_pcie->cmd_hold_nic_awake)) + return; + + trans_pcie->cmd_hold_nic_awake = false; + __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); +} + /* * iwl_pcie_txq_unmap - Unmap any remaining DMA mappings and free skb's */ @@ -620,6 +642,20 @@ static void iwl_pcie_txq_unmap(struct iwl_trans *trans, int txq_id) } iwl_pcie_txq_free_tfd(trans, txq); q->read_ptr = iwl_queue_inc_wrap(q->read_ptr); + + if (q->read_ptr == q->write_ptr) { + unsigned long flags; + + spin_lock_irqsave(&trans_pcie->reg_lock, flags); + if (txq_id != trans_pcie->cmd_queue) { + IWL_DEBUG_RPM(trans, "Q %d - last tx freed\n", + q->id); + iwl_trans_pcie_unref(trans); + } else { + iwl_pcie_clear_cmd_in_flight(trans); + } + spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); + } } txq->active = false; @@ -1148,29 +1184,6 @@ static int iwl_pcie_set_cmd_in_flight(struct iwl_trans *trans, return 0; } -static int iwl_pcie_clear_cmd_in_flight(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - lockdep_assert_held(&trans_pcie->reg_lock); - - if (trans_pcie->ref_cmd_in_flight) { - trans_pcie->ref_cmd_in_flight = false; - IWL_DEBUG_RPM(trans, "clear ref_cmd_in_flight - unref\n"); - iwl_trans_pcie_unref(trans); - } - - if (trans->cfg->base_params->apmg_wake_up_wa) { - if (WARN_ON(!trans_pcie->cmd_hold_nic_awake)) - return 0; - - trans_pcie->cmd_hold_nic_awake = false; - __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - } - return 0; -} - /* * iwl_pcie_cmdq_reclaim - Reclaim TX command queue entries already Tx'd * @@ -2197,6 +2210,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, __le16 fc; u8 hdr_len; u16 wifi_seq; + bool amsdu; txq = &trans_pcie->txq[txq_id]; q = &txq->q; @@ -2288,11 +2302,18 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, */ len = sizeof(struct iwl_tx_cmd) + sizeof(struct iwl_cmd_header) + hdr_len - IWL_HCMD_SCRATCHBUF_SIZE; - tb1_len = ALIGN(len, 4); - - /* Tell NIC about any 2-byte padding after MAC header */ - if (tb1_len != len) - tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; + /* do not align A-MSDU to dword as the subframe header aligns it */ + amsdu = ieee80211_is_data_qos(fc) && + (*ieee80211_get_qos_ctl(hdr) & + IEEE80211_QOS_CTL_A_MSDU_PRESENT); + if (trans_pcie->sw_csum_tx || !amsdu) { + tb1_len = ALIGN(len, 4); + /* Tell NIC about any 2-byte padding after MAC header */ + if (tb1_len != len) + tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; + } else { + tb1_len = len; + } /* The first TB points to the scratchbuf data - min_copy bytes */ memcpy(&txq->scratchbufs[q->write_ptr], &dev_cmd->hdr, @@ -2310,8 +2331,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, goto out_err; iwl_pcie_txq_build_tfd(trans, txq, tb1_phys, tb1_len, false); - if (ieee80211_is_data_qos(fc) && - (*ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_A_MSDU_PRESENT)) { + if (amsdu) { if (unlikely(iwl_fill_data_tbs_amsdu(trans, skb, txq, hdr_len, out_meta, dev_cmd, tb1_len))) |