iwlwifi: support new tx api

22560 devices use a new tx cmd api. Update the code to use
the new api.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/api/commands.h

@@ -193,7 +193,8 @@ enum iwl_legacy_cmds {
 	FW_GET_ITEM_CMD = 0x1a,
 
 	/**
-	 * @TX_CMD: uses &struct iwl_tx_cmd or &struct iwl_tx_cmd_gen2,
+	 * @TX_CMD: uses &struct iwl_tx_cmd or &struct iwl_tx_cmd_gen2 or
+	 *	&struct iwl_tx_cmd_gen3,
 	 *	response in &struct iwl_mvm_tx_resp or
 	 *	&struct iwl_mvm_tx_resp_v3
 	 */

drivers/net/wireless/intel/iwlwifi/fw/api/tx.h

@@ -7,6 +7,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
+ * Copyright(c) 2018 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -28,6 +29,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
+ * Copyright(c) 2018 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -320,6 +322,29 @@ struct iwl_tx_cmd_gen2 {
 	struct ieee80211_hdr hdr[0];
 } __packed; /* TX_CMD_API_S_VER_7 */
 
+/**
+ * struct iwl_tx_cmd_gen3 - TX command struct to FW for 22560 devices
+ * ( TX_CMD = 0x1c )
+ * @len: in bytes of the payload, see below for details
+ * @flags: combination of &enum iwl_tx_cmd_flags
+ * @offload_assist: TX offload configuration
+ * @dram_info: FW internal DRAM storage
+ * @rate_n_flags: rate for *all* Tx attempts, if TX_CMD_FLG_STA_RATE_MSK is
+ *	cleared. Combination of RATE_MCS_*
+ * @ttl: time to live - packet lifetime limit. The FW should drop if
+ *	passed.
+ * @hdr: 802.11 header
+ */
+struct iwl_tx_cmd_gen3 {
+	__le16 len;
+	__le16 flags;
+	__le32 offload_assist;
+	struct iwl_dram_sec_info dram_info;
+	__le32 rate_n_flags;
+	__le64 ttl;
+	struct ieee80211_hdr hdr[0];
+} __packed; /* TX_CMD_API_S_VER_8 */
+
 /*
  * TX response related data
  */

drivers/net/wireless/intel/iwlwifi/mvm/tx.c

@@ -484,13 +484,15 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 
 	/* Make sure we zero enough of dev_cmd */
 	BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
+	BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd));
 
 	memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
 	dev_cmd->hdr.cmd = TX_CMD;
 
 	if (iwl_mvm_has_new_tx_api(mvm)) {
-		struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 		u16 offload_assist = 0;
+		u32 rate_n_flags = 0;
+		u16 flags = 0;
 
 		if (ieee80211_is_data_qos(hdr->frame_control)) {
 			u8 *qc = ieee80211_get_qos_ctl(hdr);
@@ -507,7 +509,20 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 		    !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 			offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 
-		cmd->offload_assist |= cpu_to_le16(offload_assist);
+		if (!info->control.hw_key)
+			flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
+
+		/* For data packets rate info comes from the fw */
+		if (!(ieee80211_is_data(hdr->frame_control) && sta)) {
+			flags |= IWL_TX_FLAGS_CMD_RATE;
+			rate_n_flags = iwl_mvm_get_tx_rate(mvm, info, sta);
+		}
+
+		if (mvm->trans->cfg->device_family >=
+		    IWL_DEVICE_FAMILY_22560) {
+			struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
+
+			cmd->offload_assist |= cpu_to_le32(offload_assist);
 
 			/* Total # bytes to be transmitted */
 			cmd->len = cpu_to_le16((u16)skb->len);
@@ -515,17 +530,22 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 			/* Copy MAC header from skb into command buffer */
 			memcpy(cmd->hdr, hdr, hdrlen);
 
-		if (!info->control.hw_key)
-			cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS);
+			cmd->flags = cpu_to_le16(flags);
+			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
+		} else {
+			struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 
-		/* For data packets rate info comes from the fw */
-		if (ieee80211_is_data(hdr->frame_control) && sta)
-			goto out;
+			cmd->offload_assist |= cpu_to_le16(offload_assist);
+
+			/* Total # bytes to be transmitted */
+			cmd->len = cpu_to_le16((u16)skb->len);
 
-		cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE);
-		cmd->rate_n_flags =
-			cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
+			/* Copy MAC header from skb into command buffer */
+			memcpy(cmd->hdr, hdr, hdrlen);
 
+			cmd->flags = cpu_to_le32(flags);
+			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
+		}
 		goto out;
 	}
 

drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c

@@ -402,8 +402,14 @@ struct iwl_tfh_tfd *iwl_pcie_gen2_build_tfd(struct iwl_trans *trans,
 	 * (This calculation modifies the TX command, so do it before the
 	 * setup of the first TB)
 	 */
-	len = sizeof(struct iwl_tx_cmd_gen2) + sizeof(struct iwl_cmd_header) +
-	      ieee80211_hdrlen(hdr->frame_control) - IWL_FIRST_TB_SIZE;
+	if (trans->cfg->device_family < IWL_DEVICE_FAMILY_22560)
+		len = sizeof(struct iwl_tx_cmd_gen2);
+	else
+		len = sizeof(struct iwl_tx_cmd_gen3);
+
+	len += sizeof(struct iwl_cmd_header) +
+		ieee80211_hdrlen(hdr->frame_control) -
+		IWL_FIRST_TB_SIZE;
 
 	/* do not align A-MSDU to dword as the subframe header aligns it */
 	if (amsdu)
@@ -480,9 +486,9 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
 			   struct iwl_device_cmd *dev_cmd, int txq_id)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	struct iwl_tx_cmd_gen2 *tx_cmd = (void *)dev_cmd->payload;
 	struct iwl_cmd_meta *out_meta;
 	struct iwl_txq *txq = trans_pcie->txq[txq_id];
+	u16 cmd_len;
 	int idx;
 	void *tfd;
 
@@ -497,6 +503,18 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
 
 	spin_lock(&txq->lock);
 
+	if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
+		struct iwl_tx_cmd_gen3 *tx_cmd_gen3 =
+			(void *)dev_cmd->payload;
+
+		cmd_len = le16_to_cpu(tx_cmd_gen3->len);
+	} else {
+		struct iwl_tx_cmd_gen2 *tx_cmd_gen2 =
+			(void *)dev_cmd->payload;
+
+		cmd_len = le16_to_cpu(tx_cmd_gen2->len);
+	}
+
 	if (iwl_queue_space(trans, txq) < txq->high_mark) {
 		iwl_stop_queue(trans, txq);
 
@@ -535,7 +553,7 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
 	}
 
 	/* Set up entry for this TFD in Tx byte-count array */
-	iwl_pcie_gen2_update_byte_tbl(trans_pcie, txq, le16_to_cpu(tx_cmd->len),
+	iwl_pcie_gen2_update_byte_tbl(trans_pcie, txq, cmd_len,
 				      iwl_pcie_gen2_get_num_tbs(trans, tfd));
 
 	/* start timer if queue currently empty */