wifi: iwlwifi: remove 'use_tfh' config to fix crash

This is equivalent to 'gen2', and it was always confusing to have
two identical config entries. The split config patch actually had
been originally developed after removing 'use_tfh" and didn't add
the use_tfh in the new configs as they'd later been copied to the
new files. Thus the easiest way to fix the init crash here now is
to just remove use_tfh (which is erroneously unset in most of the
configs now) and use 'gen2' in the code instead.

There's possibly still an unwind error in iwl_txq_gen2_init() as
it crashes if TXQ 0 fails to initialize, but we can deal with it
later since the original failure is due to the use_tfh confusion.
Tested-by: Xi Ruoyao <xry111@xry111.site>
Reported-and-tested-by: Niklāvs Koļesņikovs <pinkflames.linux@gmail.com>
Reported-and-tested-by: Jeff Chua <jeff.chua.linux@gmail.com>
Reported-and-tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217622
Link: https://lore.kernel.org/all/9274d9bd3d080a457649ff5addcc1726f08ef5b2.camel@xry111.site/
Link: https://lore.kernel.org/all/CAAJw_Zug6VCS5ZqTWaFSr9sd85k%3DtyPm9DEE%2BmV%3DAKoECZM%2BsQ@mail.gmail.com/
Fixes: 19898ce9 ("wifi: iwlwifi: split 22000.c into multiple files")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20230710145038.84186-2-johannes@sipsolutions.netSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wireless/intel/iwlwifi/cfg/22000.c

@@ -84,7 +84,6 @@ const struct iwl_ht_params iwl_22000_ht_params = {
 	.mac_addr_from_csr = 0x380,					\
 	.ht_params = &iwl_22000_ht_params,				\
 	.nvm_ver = IWL_22000_NVM_VERSION,				\
-	.trans.use_tfh = true,						\
 	.trans.rf_id = true,						\
 	.trans.gen2 = true,						\
 	.nvm_type = IWL_NVM_EXT,					\
@@ -122,7 +121,6 @@ const struct iwl_ht_params iwl_22000_ht_params = {
 
 const struct iwl_cfg_trans_params iwl_qu_trans_cfg = {
 	.mq_rx_supported = true,
-	.use_tfh = true,
 	.rf_id = true,
 	.gen2 = true,
 	.device_family = IWL_DEVICE_FAMILY_22000,
@@ -134,7 +132,6 @@ const struct iwl_cfg_trans_params iwl_qu_trans_cfg = {
 
 const struct iwl_cfg_trans_params iwl_qu_medium_latency_trans_cfg = {
 	.mq_rx_supported = true,
-	.use_tfh = true,
 	.rf_id = true,
 	.gen2 = true,
 	.device_family = IWL_DEVICE_FAMILY_22000,
@@ -146,7 +143,6 @@ const struct iwl_cfg_trans_params iwl_qu_medium_latency_trans_cfg = {
 
 const struct iwl_cfg_trans_params iwl_qu_long_latency_trans_cfg = {
 	.mq_rx_supported = true,
-	.use_tfh = true,
 	.rf_id = true,
 	.gen2 = true,
 	.device_family = IWL_DEVICE_FAMILY_22000,
@@ -200,7 +196,6 @@ const struct iwl_cfg_trans_params iwl_ax200_trans_cfg = {
 	.device_family = IWL_DEVICE_FAMILY_22000,
 	.base_params = &iwl_22000_base_params,
 	.mq_rx_supported = true,
-	.use_tfh = true,
 	.rf_id = true,
 	.gen2 = true,
 	.bisr_workaround = 1,

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

@@ -256,7 +256,6 @@ enum iwl_cfg_trans_ltr_delay {
  * @xtal_latency: power up latency to get the xtal stabilized
  * @extra_phy_cfg_flags: extra configuration flags to pass to the PHY
  * @rf_id: need to read rf_id to determine the firmware image
- * @use_tfh: use TFH
  * @gen2: 22000 and on transport operation
  * @mq_rx_supported: multi-queue rx support
  * @integrated: discrete or integrated
@@ -271,7 +270,6 @@ struct iwl_cfg_trans_params {
 	u32 xtal_latency;
 	u32 extra_phy_cfg_flags;
 	u32 rf_id:1,
-	    use_tfh:1,
 	    gen2:1,
 	    mq_rx_supported:1,
 	    integrated:1,

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

 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 /*
- * Copyright (C) 2005-2014, 2018-2021 Intel Corporation
+ * Copyright (C) 2005-2014, 2018-2021, 2023 Intel Corporation
  * Copyright (C) 2015-2017 Intel Deutschland GmbH
  */
 #ifndef __iwl_fh_h__
@@ -71,7 +71,7 @@
 static inline unsigned int FH_MEM_CBBC_QUEUE(struct iwl_trans *trans,
 					     unsigned int chnl)
 {
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		WARN_ON_ONCE(chnl >= 64);
 		return TFH_TFDQ_CBB_TABLE + 8 * chnl;
 	}

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

@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2015 Intel Mobile Communications GmbH
  * Copyright (C) 2016-2017 Intel Deutschland GmbH
- * Copyright (C) 2019-2021 Intel Corporation
+ * Copyright (C) 2019-2021, 2023 Intel Corporation
  */
 #include <linux/kernel.h>
 #include <linux/bsearch.h>
@@ -42,7 +42,7 @@ struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
 
 	WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
 
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		trans->txqs.tfd.addr_size = 64;
 		trans->txqs.tfd.max_tbs = IWL_TFH_NUM_TBS;
 		trans->txqs.tfd.size = sizeof(struct iwl_tfh_tfd);
@@ -101,7 +101,7 @@ int iwl_trans_init(struct iwl_trans *trans)
 
 	/* Some things must not change even if the config does */
 	WARN_ON(trans->txqs.tfd.addr_size !=
-		(trans->trans_cfg->use_tfh ? 64 : 36));
+		(trans->trans_cfg->gen2 ? 64 : 36));
 
 	snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
 		 "iwl_cmd_pool:%s", dev_name(trans->dev));

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -1450,7 +1450,7 @@ static inline bool iwl_mvm_has_new_station_api(const struct iwl_fw *fw)
 static inline bool iwl_mvm_has_new_tx_api(struct iwl_mvm *mvm)
 {
 	/* TODO - replace with TLV once defined */
-	return mvm->trans->trans_cfg->use_tfh;
+	return mvm->trans->trans_cfg->gen2;
 }
 
 static inline bool iwl_mvm_has_unified_ucode(struct iwl_mvm *mvm)

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

@@ -819,7 +819,7 @@ static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
 
 	iwl_enable_interrupts(trans);
 
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		if (cpu == 1)
 			iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
 				       0xFFFF);
@@ -3394,7 +3394,7 @@ iwl_trans_pcie_dump_data(struct iwl_trans *trans,
 			u8 tfdidx;
 			u32 caplen, cmdlen;
 
-			if (trans->trans_cfg->use_tfh)
+			if (trans->trans_cfg->gen2)
 				tfdidx = idx;
 			else
 				tfdidx = ptr;

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

@@ -364,7 +364,7 @@ void iwl_trans_pcie_tx_reset(struct iwl_trans *trans)
 	for (txq_id = 0; txq_id < trans->trans_cfg->base_params->num_of_queues;
 	     txq_id++) {
 		struct iwl_txq *txq = trans->txqs.txq[txq_id];
-		if (trans->trans_cfg->use_tfh)
+		if (trans->trans_cfg->gen2)
 			iwl_write_direct64(trans,
 					   FH_MEM_CBBC_QUEUE(trans, txq_id),
 					   txq->dma_addr);

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

@@ -985,7 +985,7 @@ void iwl_txq_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
 	bool active;
 	u8 fifo;
 
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		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 */
@@ -1040,7 +1040,7 @@ int iwl_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num,
 	if (WARN_ON(txq->entries || txq->tfds))
 		return -EINVAL;
 
-	if (trans->trans_cfg->use_tfh)
+	if (trans->trans_cfg->gen2)
 		tfd_sz = trans->txqs.tfd.size * slots_num;
 
 	timer_setup(&txq->stuck_timer, iwl_txq_stuck_timer, 0);
@@ -1347,7 +1347,7 @@ static inline dma_addr_t iwl_txq_gen1_tfd_tb_get_addr(struct iwl_trans *trans,
 	dma_addr_t addr;
 	dma_addr_t hi_len;
 
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		struct iwl_tfh_tfd *tfh_tfd = _tfd;
 		struct iwl_tfh_tb *tfh_tb = &tfh_tfd->tbs[idx];
 
@@ -1408,7 +1408,7 @@ void iwl_txq_gen1_tfd_unmap(struct iwl_trans *trans,
 
 	meta->tbs = 0;
 
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
 
 		tfd_fh->num_tbs = 0;
@@ -1625,7 +1625,7 @@ void iwl_txq_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
 
 		txq->entries[read_ptr].skb = NULL;
 
-		if (!trans->trans_cfg->use_tfh)
+		if (!trans->trans_cfg->gen2)
 			iwl_txq_gen1_inval_byte_cnt_tbl(trans, txq);
 
 		iwl_txq_free_tfd(trans, txq);

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

 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 /*
- * Copyright (C) 2020-2022 Intel Corporation
+ * Copyright (C) 2020-2023 Intel Corporation
  */
 #ifndef __iwl_trans_queue_tx_h__
 #define __iwl_trans_queue_tx_h__
@@ -38,7 +38,7 @@ static inline void iwl_wake_queue(struct iwl_trans *trans,
 static inline void *iwl_txq_get_tfd(struct iwl_trans *trans,
 				    struct iwl_txq *txq, int idx)
 {
-	if (trans->trans_cfg->use_tfh)
+	if (trans->trans_cfg->gen2)
 		idx = iwl_txq_get_cmd_index(txq, idx);
 
 	return (u8 *)txq->tfds + trans->txqs.tfd.size * idx;
@@ -135,7 +135,7 @@ static inline u8 iwl_txq_gen1_tfd_get_num_tbs(struct iwl_trans *trans,
 {
 	struct iwl_tfd *tfd;
 
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		struct iwl_tfh_tfd *tfh_tfd = _tfd;
 
 		return le16_to_cpu(tfh_tfd->num_tbs) & 0x1f;
@@ -151,7 +151,7 @@ static inline u16 iwl_txq_gen1_tfd_tb_get_len(struct iwl_trans *trans,
 	struct iwl_tfd *tfd;
 	struct iwl_tfd_tb *tb;
 
-	if (trans->trans_cfg->use_tfh) {
+	if (trans->trans_cfg->gen2) {
 		struct iwl_tfh_tfd *tfh_tfd = _tfd;
 		struct iwl_tfh_tb *tfh_tb = &tfh_tfd->tbs[idx];