iwlwifi: move all bus-independent TX functions to common code

After moving out all Tx fields not related to pcie-bus
it's time to move the code to a common place.

We also rename all pcie functions name to txq.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200930161256.3947a5276003.I3fe1bec2b25a965a49532df288f47b8b59eb1500@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/Makefile

@@ -13,6 +13,7 @@ iwlwifi-$(CONFIG_IWLDVM) += cfg/1000.o cfg/2000.o cfg/5000.o cfg/6000.o
 iwlwifi-$(CONFIG_IWLMVM) += cfg/7000.o cfg/8000.o cfg/9000.o cfg/22000.o
 iwlwifi-objs		+= iwl-dbg-tlv.o
 iwlwifi-objs		+= iwl-trans.o
+iwlwifi-objs		+= queue/tx.o
 
 iwlwifi-objs		+= fw/img.o fw/notif-wait.o
 iwlwifi-objs		+= fw/dbg.o

drivers/net/wireless/intel/iwlwifi/iwl-trans.c

@@ -66,6 +66,7 @@
 #include "iwl-trans.h"
 #include "iwl-drv.h"
 #include "iwl-fh.h"
+#include "queue/tx.h"
 #include <linux/dmapool.h>
 
 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
@@ -150,11 +151,29 @@ struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
 
 	WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
 
+	trans->txqs.tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
+	if (!trans->txqs.tso_hdr_page) {
+		kmem_cache_destroy(trans->dev_cmd_pool);
+		return NULL;
+	}
+
 	return trans;
 }
 
 void iwl_trans_free(struct iwl_trans *trans)
 {
+	int i;
+
+	for_each_possible_cpu(i) {
+		struct iwl_tso_hdr_page *p =
+			per_cpu_ptr(trans->txqs.tso_hdr_page, i);
+
+		if (p->page)
+			__free_page(p->page);
+	}
+
+	free_percpu(trans->txqs.tso_hdr_page);
+
 	kmem_cache_destroy(trans->dev_cmd_pool);
 }
 

drivers/net/wireless/intel/iwlwifi/iwl-trans.h

@@ -928,6 +928,7 @@ struct iwl_trans_txqs {
 	bool bc_table_dword;
 	u8 page_offs;
 	u8 dev_cmd_offs;
+	struct __percpu iwl_tso_hdr_page * tso_hdr_page;
 
 	struct {
 		u8 fifo;

drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c

@@ -73,7 +73,7 @@ static void *_iwl_pcie_ctxt_info_dma_alloc_coherent(struct iwl_trans *trans,
 	if (!result)
 		return NULL;
 
-	if (unlikely(iwl_pcie_crosses_4g_boundary(*phys, size))) {
+	if (unlikely(iwl_txq_crosses_4g_boundary(*phys, size))) {
 		void *old = result;
 		dma_addr_t oldphys = *phys;
 

drivers/net/wireless/intel/iwlwifi/pcie/internal.h

@@ -79,6 +79,7 @@
 #include "iwl-io.h"
 #include "iwl-op-mode.h"
 #include "iwl-drv.h"
+#include "queue/tx.h"
 
 /*
  * RX related structures and functions
@@ -240,16 +241,6 @@ struct iwl_rb_allocator {
 	struct work_struct rx_alloc;
 };
 
-/**
- * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
- * @index -- current index
- */
-static inline int iwl_queue_inc_wrap(struct iwl_trans *trans, int index)
-{
-	return ++index &
-		(trans->trans_cfg->base_params->max_tfd_queue_size - 1);
-}
-
 /**
  * iwl_get_closed_rb_stts - get closed rb stts from different structs
  * @rxq - the rxq to get the rb stts from
@@ -268,28 +259,6 @@ static inline __le16 iwl_get_closed_rb_stts(struct iwl_trans *trans,
 	}
 }
 
-/**
- * iwl_queue_dec_wrap - decrement queue index, wrap back to end
- * @index -- current index
- */
-static inline int iwl_queue_dec_wrap(struct iwl_trans *trans, int index)
-{
-	return --index &
-		(trans->trans_cfg->base_params->max_tfd_queue_size - 1);
-}
-
-static inline dma_addr_t
-iwl_pcie_get_first_tb_dma(struct iwl_txq *txq, int idx)
-{
-	return txq->first_tb_dma +
-	       sizeof(struct iwl_pcie_first_tb_buf) * idx;
-}
-
-struct iwl_tso_hdr_page {
-	struct page *page;
-	u8 *pos;
-};
-
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 /**
  * enum iwl_fw_mon_dbgfs_state - the different states of the monitor_data
@@ -427,8 +396,6 @@ struct iwl_trans_pcie {
 
 	struct net_device napi_dev;
 
-	struct __percpu iwl_tso_hdr_page *tso_hdr_page;
-
 	/* INT ICT Table */
 	__le32 *ict_tbl;
 	dma_addr_t ict_tbl_dma;
@@ -566,19 +533,7 @@ void iwl_pcie_disable_ict(struct iwl_trans *trans);
 /*****************************************************
 * TX / HCMD
 ******************************************************/
-/*
- * We need this inline in case dma_addr_t is only 32-bits - since the
- * hardware is always 64-bit, the issue can still occur in that case,
- * so use u64 for 'phys' here to force the addition in 64-bit.
- */
-static inline bool iwl_pcie_crosses_4g_boundary(u64 phys, u16 len)
-{
-	return upper_32_bits(phys) != upper_32_bits(phys + len);
-}
-
 int iwl_pcie_tx_init(struct iwl_trans *trans);
-int iwl_pcie_gen2_tx_init(struct iwl_trans *trans, int txq_id,
-			  int queue_size);
 void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr);
 int iwl_pcie_tx_stop(struct iwl_trans *trans);
 void iwl_pcie_tx_free(struct iwl_trans *trans);
@@ -589,14 +544,10 @@ void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue,
 				bool configure_scd);
 void iwl_trans_pcie_txq_set_shared_mode(struct iwl_trans *trans, u32 txq_id,
 					bool shared_mode);
-void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans,
-				  struct iwl_txq *txq);
 int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 		      struct iwl_device_tx_cmd *dev_cmd, int txq_id);
 void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans);
 int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
-void iwl_pcie_gen2_txq_inc_wr_ptr(struct iwl_trans *trans,
-				  struct iwl_txq *txq);
 void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
 			    struct iwl_rx_cmd_buffer *rxb);
 void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
@@ -787,20 +738,6 @@ static inline void iwl_enable_fw_load_int_ctx_info(struct iwl_trans *trans)
 	}
 }
 
-static inline u16 iwl_pcie_get_cmd_index(const struct iwl_txq *q, u32 index)
-{
-	return index & (q->n_window - 1);
-}
-
-static inline void *iwl_pcie_get_tfd(struct iwl_trans *trans,
-				     struct iwl_txq *txq, int idx)
-{
-	if (trans->trans_cfg->use_tfh)
-		idx = iwl_pcie_get_cmd_index(txq, idx);
-
-	return txq->tfds + trans->txqs.tfd.size * idx;
-}
-
 static inline const char *queue_name(struct device *dev,
 				     struct iwl_trans_pcie *trans_p, int i)
 {
@@ -852,37 +789,6 @@ static inline void iwl_enable_rfkill_int(struct iwl_trans *trans)
 
 void iwl_pcie_handle_rfkill_irq(struct iwl_trans *trans);
 
-static inline void iwl_wake_queue(struct iwl_trans *trans,
-				  struct iwl_txq *txq)
-{
-	if (test_and_clear_bit(txq->id, trans->txqs.queue_stopped)) {
-		IWL_DEBUG_TX_QUEUES(trans, "Wake hwq %d\n", txq->id);
-		iwl_op_mode_queue_not_full(trans->op_mode, txq->id);
-	}
-}
-
-static inline void iwl_stop_queue(struct iwl_trans *trans,
-				  struct iwl_txq *txq)
-{
-	if (!test_and_set_bit(txq->id, trans->txqs.queue_stopped)) {
-		iwl_op_mode_queue_full(trans->op_mode, txq->id);
-		IWL_DEBUG_TX_QUEUES(trans, "Stop hwq %d\n", txq->id);
-	} else
-		IWL_DEBUG_TX_QUEUES(trans, "hwq %d already stopped\n",
-				    txq->id);
-}
-
-static inline bool iwl_queue_used(const struct iwl_txq *q, int i)
-{
-	int index = iwl_pcie_get_cmd_index(q, i);
-	int r = iwl_pcie_get_cmd_index(q, q->read_ptr);
-	int w = iwl_pcie_get_cmd_index(q, q->write_ptr);
-
-	return w >= r ?
-		(index >= r && index < w) :
-		!(index < r && index >= w);
-}
-
 static inline bool iwl_is_rfkill_set(struct iwl_trans *trans)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
@@ -949,23 +855,12 @@ bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans);
 void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
 				       bool was_in_rfkill);
 void iwl_pcie_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq);
-int iwl_queue_space(struct iwl_trans *trans, const struct iwl_txq *q);
 void iwl_pcie_apm_stop_master(struct iwl_trans *trans);
 void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie);
-int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq,
-		      int slots_num, bool cmd_queue);
-int iwl_pcie_txq_alloc(struct iwl_trans *trans,
-		       struct iwl_txq *txq, int slots_num,  bool cmd_queue);
 int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans,
 			   struct iwl_dma_ptr *ptr, size_t size);
 void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr);
 void iwl_pcie_apply_destination(struct iwl_trans *trans);
-void iwl_pcie_free_tso_page(struct iwl_trans *trans,
-			    struct sk_buff *skb);
-#ifdef CONFIG_INET
-struct iwl_tso_hdr_page *get_page_hdr(struct iwl_trans *trans, size_t len,
-				      struct sk_buff *skb);
-#endif
 
 /* common functions that are used by gen3 transport */
 void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power);
@@ -974,28 +869,10 @@ void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power);
 int iwl_trans_pcie_gen2_start_fw(struct iwl_trans *trans,
 				 const struct fw_img *fw, bool run_in_rfkill);
 void iwl_trans_pcie_gen2_fw_alive(struct iwl_trans *trans, u32 scd_addr);
-void iwl_pcie_gen2_txq_free_memory(struct iwl_trans *trans,
-				   struct iwl_txq *txq);
-int iwl_trans_pcie_dyn_txq_alloc_dma(struct iwl_trans *trans,
-				     struct iwl_txq **intxq, int size,
-				     unsigned int timeout);
-int iwl_trans_pcie_txq_alloc_response(struct iwl_trans *trans,
-				      struct iwl_txq *txq,
-				      struct iwl_host_cmd *hcmd);
-int iwl_trans_pcie_dyn_txq_alloc(struct iwl_trans *trans,
-				 __le16 flags, u8 sta_id, u8 tid,
-				 int cmd_id, int size,
-				 unsigned int timeout);
-void iwl_trans_pcie_dyn_txq_free(struct iwl_trans *trans, int queue);
-int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
-			   struct iwl_device_tx_cmd *dev_cmd, int txq_id);
 int iwl_trans_pcie_gen2_send_hcmd(struct iwl_trans *trans,
 				  struct iwl_host_cmd *cmd);
 void iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans);
 void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans);
-void iwl_pcie_gen2_txq_unmap(struct iwl_trans *trans, int txq_id);
-void iwl_pcie_gen2_tx_free(struct iwl_trans *trans);
-void iwl_pcie_gen2_tx_stop(struct iwl_trans *trans);
 void iwl_pcie_d3_complete_suspend(struct iwl_trans *trans,
 				  bool test, bool reset);
 #endif /* __iwl_trans_int_pcie_h__ */

drivers/net/wireless/intel/iwlwifi/pcie/rx.c

@@ -1359,7 +1359,7 @@ static void iwl_pcie_rx_handle_rb(struct iwl_trans *trans,
 
 		sequence = le16_to_cpu(pkt->hdr.sequence);
 		index = SEQ_TO_INDEX(sequence);
-		cmd_index = iwl_pcie_get_cmd_index(txq, index);
+		cmd_index = iwl_txq_get_cmd_index(txq, index);
 
 		if (rxq->id == trans_pcie->def_rx_queue)
 			iwl_op_mode_rx(trans->op_mode, &rxq->napi,

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

@@ -162,7 +162,7 @@ void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans)
 	if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
 		IWL_DEBUG_INFO(trans,
 			       "DEVICE_ENABLED bit was set and is now cleared\n");
-		iwl_pcie_gen2_tx_stop(trans);
+		iwl_txq_gen2_tx_stop(trans);
 		iwl_pcie_rx_stop(trans);
 	}
 
@@ -245,7 +245,7 @@ static int iwl_pcie_gen2_nic_init(struct iwl_trans *trans)
 		return -ENOMEM;
 
 	/* Allocate or reset and init all Tx and Command queues */
-	if (iwl_pcie_gen2_tx_init(trans, trans->txqs.cmd.q_id, queue_size))
+	if (iwl_txq_gen2_init(trans, trans->txqs.cmd.q_id, queue_size))
 		return -ENOMEM;
 
 	/* enable shadow regs in HW */

drivers/net/wireless/intel/iwlwifi/pcie/trans.c

@@ -1955,7 +1955,7 @@ void iwl_trans_pcie_free(struct iwl_trans *trans)
 	iwl_pcie_synchronize_irqs(trans);
 
 	if (trans->trans_cfg->gen2)
-		iwl_pcie_gen2_tx_free(trans);
+		iwl_txq_gen2_tx_free(trans);
 	else
 		iwl_pcie_tx_free(trans);
 	iwl_pcie_rx_free(trans);
@@ -1979,15 +1979,6 @@ void iwl_trans_pcie_free(struct iwl_trans *trans)
 
 	iwl_pcie_free_fw_monitor(trans);
 
-	for_each_possible_cpu(i) {
-		struct iwl_tso_hdr_page *p =
-			per_cpu_ptr(trans_pcie->tso_hdr_page, i);
-
-		if (p->page)
-			__free_page(p->page);
-	}
-
-	free_percpu(trans_pcie->tso_hdr_page);
 	mutex_destroy(&trans_pcie->mutex);
 	iwl_trans_free(trans);
 }
@@ -2280,36 +2271,6 @@ static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
 
 #define IWL_FLUSH_WAIT_MS	2000
 
-void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
-{
-	u32 txq_id = txq->id;
-	u32 status;
-	bool active;
-	u8 fifo;
-
-	if (trans->trans_cfg->use_tfh) {
-		IWL_ERR(trans, "Queue %d is stuck %d %d\n", txq_id,
-			txq->read_ptr, txq->write_ptr);
-		/* TODO: access new SCD registers and dump them */
-		return;
-	}
-
-	status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id));
-	fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
-	active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
-
-	IWL_ERR(trans,
-		"Queue %d is %sactive on fifo %d and stuck for %u ms. SW [%d, %d] HW [%d, %d] FH TRB=0x0%x\n",
-		txq_id, active ? "" : "in", fifo,
-		jiffies_to_msecs(txq->wd_timeout),
-		txq->read_ptr, txq->write_ptr,
-		iwl_read_prph(trans, SCD_QUEUE_RDPTR(txq_id)) &
-			(trans->trans_cfg->base_params->max_tfd_queue_size - 1),
-			iwl_read_prph(trans, SCD_QUEUE_WRPTR(txq_id)) &
-			(trans->trans_cfg->base_params->max_tfd_queue_size - 1),
-			iwl_read_direct32(trans, FH_TX_TRB_REG(fifo)));
-}
-
 static int iwl_trans_pcie_rxq_dma_data(struct iwl_trans *trans, int queue,
 				       struct iwl_trans_rxq_dma_data *data)
 {
@@ -2378,7 +2339,7 @@ static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
 	if (txq->read_ptr != txq->write_ptr) {
 		IWL_ERR(trans,
 			"fail to flush all tx fifo queues Q %d\n", txq_idx);
-		iwl_trans_pcie_log_scd_error(trans, txq);
+		iwl_txq_log_scd_error(trans, txq);
 		return -ETIMEDOUT;
 	}
 
@@ -3339,7 +3300,7 @@ static struct iwl_trans_dump_data
 		spin_lock_bh(&cmdq->lock);
 		ptr = cmdq->write_ptr;
 		for (i = 0; i < cmdq->n_window; i++) {
-			u8 idx = iwl_pcie_get_cmd_index(cmdq, ptr);
+			u8 idx = iwl_txq_get_cmd_index(cmdq, ptr);
 			u8 tfdidx;
 			u32 caplen, cmdlen;
 
@@ -3362,7 +3323,7 @@ static struct iwl_trans_dump_data
 				txcmd = (void *)((u8 *)txcmd->data + caplen);
 			}
 
-			ptr = iwl_queue_dec_wrap(trans, ptr);
+			ptr = iwl_txq_dec_wrap(trans, ptr);
 		}
 		spin_unlock_bh(&cmdq->lock);
 
@@ -3481,13 +3442,13 @@ static const struct iwl_trans_ops trans_ops_pcie_gen2 = {
 
 	.send_cmd = iwl_trans_pcie_gen2_send_hcmd,
 
-	.tx = iwl_trans_pcie_gen2_tx,
+	.tx = iwl_txq_gen2_tx,
 	.reclaim = iwl_trans_pcie_reclaim,
 
 	.set_q_ptrs = iwl_trans_pcie_set_q_ptrs,
 
-	.txq_alloc = iwl_trans_pcie_dyn_txq_alloc,
-	.txq_free = iwl_trans_pcie_dyn_txq_free,
+	.txq_alloc = iwl_txq_dyn_alloc,
+	.txq_free = iwl_txq_dyn_free,
 	.wait_txq_empty = iwl_trans_pcie_wait_txq_empty,
 	.rxq_dma_data = iwl_trans_pcie_rxq_dma_data,
 #ifdef CONFIG_IWLWIFI_DEBUGFS
@@ -3534,11 +3495,6 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
 	}
 	INIT_WORK(&trans_pcie->rba.rx_alloc, iwl_pcie_rx_allocator_work);
 
-	trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
-	if (!trans_pcie->tso_hdr_page) {
-		ret = -ENOMEM;
-		goto out_no_pci;
-	}
 	trans_pcie->debug_rfkill = -1;
 
 	if (!cfg_trans->base_params->pcie_l1_allowed) {
@@ -3671,7 +3627,6 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
 out_free_ict:
 	iwl_pcie_free_ict(trans);
 out_no_pci:
-	free_percpu(trans_pcie->tso_hdr_page);
 	destroy_workqueue(trans_pcie->rba.alloc_wq);
 out_free_trans:
 	iwl_trans_free(trans);

drivers/net/wireless/intel/iwlwifi/queue/tx.h

+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2020 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
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called COPYING.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <linuxwifi@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2020 Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#ifndef __iwl_trans_queue_tx_h__
+#define __iwl_trans_queue_tx_h__
+#include "iwl-fh.h"
+#include "fw/api/tx.h"
+
+struct iwl_tso_hdr_page {
+	struct page *page;
+	u8 *pos;
+};
+
+static inline dma_addr_t
+iwl_txq_get_first_tb_dma(struct iwl_txq *txq, int idx)
+{
+	return txq->first_tb_dma +
+	       sizeof(struct iwl_pcie_first_tb_buf) * idx;
+}
+
+static inline u16 iwl_txq_get_cmd_index(const struct iwl_txq *q, u32 index)
+{
+	return index & (q->n_window - 1);
+}
+
+void iwl_txq_gen2_unmap(struct iwl_trans *trans, int txq_id);
+
+static inline void iwl_wake_queue(struct iwl_trans *trans,
+				  struct iwl_txq *txq)
+{
+	if (test_and_clear_bit(txq->id, trans->txqs.queue_stopped)) {
+		IWL_DEBUG_TX_QUEUES(trans, "Wake hwq %d\n", txq->id);
+		iwl_op_mode_queue_not_full(trans->op_mode, txq->id);
+	}
+}
+
+static inline void *iwl_txq_get_tfd(struct iwl_trans *trans,
+				    struct iwl_txq *txq, int idx)
+{
+	if (trans->trans_cfg->use_tfh)
+		idx = iwl_txq_get_cmd_index(txq, idx);
+
+	return txq->tfds + trans->txqs.tfd.size * idx;
+}
+
+int iwl_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num,
+		  bool cmd_queue);
+/*
+ * We need this inline in case dma_addr_t is only 32-bits - since the
+ * hardware is always 64-bit, the issue can still occur in that case,
+ * so use u64 for 'phys' here to force the addition in 64-bit.
+ */
+static inline bool iwl_txq_crosses_4g_boundary(u64 phys, u16 len)
+{
+	return upper_32_bits(phys) != upper_32_bits(phys + len);
+}
+
+int iwl_txq_space(struct iwl_trans *trans, const struct iwl_txq *q);
+
+static inline void iwl_txq_stop(struct iwl_trans *trans, struct iwl_txq *txq)
+{
+	if (!test_and_set_bit(txq->id, trans->txqs.queue_stopped)) {
+		iwl_op_mode_queue_full(trans->op_mode, txq->id);
+		IWL_DEBUG_TX_QUEUES(trans, "Stop hwq %d\n", txq->id);
+	} else {
+		IWL_DEBUG_TX_QUEUES(trans, "hwq %d already stopped\n",
+				    txq->id);
+	}
+}
+
+/**
+ * iwl_txq_inc_wrap - increment queue index, wrap back to beginning
+ * @index -- current index
+ */
+static inline int iwl_txq_inc_wrap(struct iwl_trans *trans, int index)
+{
+	return ++index &
+		(trans->trans_cfg->base_params->max_tfd_queue_size - 1);
+}
+
+/**
+ * iwl_txq_dec_wrap - decrement queue index, wrap back to end
+ * @index -- current index
+ */
+static inline int iwl_txq_dec_wrap(struct iwl_trans *trans, int index)
+{
+	return --index &
+		(trans->trans_cfg->base_params->max_tfd_queue_size - 1);
+}
+
+static inline bool iwl_txq_used(const struct iwl_txq *q, int i)
+{
+	int index = iwl_txq_get_cmd_index(q, i);
+	int r = iwl_txq_get_cmd_index(q, q->read_ptr);
+	int w = iwl_txq_get_cmd_index(q, q->write_ptr);
+
+	return w >= r ?
+		(index >= r && index < w) :
+		!(index < r && index >= w);
+}
+
+void iwl_txq_free_tso_page(struct iwl_trans *trans, struct sk_buff *skb);
+
+void iwl_txq_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq);
+
+int iwl_txq_gen2_set_tb(struct iwl_trans *trans,
+			struct iwl_tfh_tfd *tfd, dma_addr_t addr,
+			u16 len);
+
+void iwl_txq_gen2_tfd_unmap(struct iwl_trans *trans,
+			    struct iwl_cmd_meta *meta,
+			    struct iwl_tfh_tfd *tfd);
+
+int iwl_txq_dyn_alloc(struct iwl_trans *trans,
+		      __le16 flags, u8 sta_id, u8 tid,
+		      int cmd_id, int size,
+		      unsigned int timeout);
+
+int iwl_txq_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
+		    struct iwl_device_tx_cmd *dev_cmd, int txq_id);
+
+void iwl_txq_dyn_free(struct iwl_trans *trans, int queue);
+void iwl_txq_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq);
+void iwl_txq_inc_wr_ptr(struct iwl_trans *trans, struct iwl_txq *txq);
+void iwl_txq_gen2_tx_stop(struct iwl_trans *trans);
+void iwl_txq_gen2_tx_free(struct iwl_trans *trans);
+int iwl_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num,
+		 bool cmd_queue);
+int iwl_txq_gen2_init(struct iwl_trans *trans, int txq_id, int queue_size);
+#ifdef CONFIG_INET
+struct iwl_tso_hdr_page *get_page_hdr(struct iwl_trans *trans, size_t len,
+				      struct sk_buff *skb);
+#endif
+#endif /* __iwl_trans_queue_tx_h__ */