wifi: iwlwifi: pcie: clean up gen1/gen2 TFD unmap

This is a bit messy right now, there are functions for both,
but then gen1 function can actually deal with both gen1 and
gen2, due to the confusion about use_tfh/gen2 cleaned up in
the previous patch.

Fix the common paths to call the right functions and remove
handling of gen2 from the gen1 function.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230816104355.baf23841ec5c.I40702e94b25db05e82f935f14548316f8c6429b9@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

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

@@ -1203,7 +1203,11 @@ void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
 	group_id = cmd->hdr.group_id;
 	cmd_id = WIDE_ID(group_id, cmd->hdr.cmd);
 
-	iwl_txq_gen1_tfd_unmap(trans, meta, txq, index);
+	if (trans->trans_cfg->gen2)
+		iwl_txq_gen2_tfd_unmap(trans, meta,
+				       iwl_txq_get_tfd(trans, txq, index));
+	else
+		iwl_txq_gen1_tfd_unmap(trans, meta, txq, index);
 
 	/* Input error checking is done when commands are added to queue. */
 	if (meta->flags & CMD_WANT_SKB) {

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

@@ -1340,22 +1340,12 @@ int iwl_txq_gen2_init(struct iwl_trans *trans, int txq_id, int queue_size)
 }
 
 static inline dma_addr_t iwl_txq_gen1_tfd_tb_get_addr(struct iwl_trans *trans,
-						      void *_tfd, u8 idx)
+						      struct iwl_tfd *tfd, u8 idx)
 {
-	struct iwl_tfd *tfd;
-	struct iwl_tfd_tb *tb;
+	struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 	dma_addr_t addr;
 	dma_addr_t hi_len;
 
-	if (trans->trans_cfg->gen2) {
-		struct iwl_tfh_tfd *tfh_tfd = _tfd;
-		struct iwl_tfh_tb *tfh_tb = &tfh_tfd->tbs[idx];
-
-		return (dma_addr_t)(le64_to_cpu(tfh_tb->addr));
-	}
-
-	tfd = _tfd;
-	tb = &tfd->tbs[idx];
 	addr = get_unaligned_le32(&tb->lo);
 
 	if (sizeof(dma_addr_t) <= sizeof(u32))
@@ -1376,7 +1366,7 @@ void iwl_txq_gen1_tfd_unmap(struct iwl_trans *trans,
 			    struct iwl_txq *txq, int index)
 {
 	int i, num_tbs;
-	void *tfd = iwl_txq_get_tfd(trans, txq, index);
+	struct iwl_tfd *tfd = iwl_txq_get_tfd(trans, txq, index);
 
 	/* Sanity check on number of chunks */
 	num_tbs = iwl_txq_gen1_tfd_get_num_tbs(trans, tfd);
@@ -1408,15 +1398,7 @@ void iwl_txq_gen1_tfd_unmap(struct iwl_trans *trans,
 
 	meta->tbs = 0;
 
-	if (trans->trans_cfg->gen2) {
-		struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
-
-		tfd_fh->num_tbs = 0;
-	} else {
-		struct iwl_tfd *tfd_fh = (void *)tfd;
-
-		tfd_fh->num_tbs = 0;
-	}
+	tfd->num_tbs = 0;
 }
 
 #define IWL_TX_CRC_SIZE 4
@@ -1520,7 +1502,12 @@ void iwl_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq)
 	/* We have only q->n_window txq->entries, but we use
 	 * TFD_QUEUE_SIZE_MAX tfds
 	 */
-	iwl_txq_gen1_tfd_unmap(trans, &txq->entries[idx].meta, txq, rd_ptr);
+	if (trans->trans_cfg->gen2)
+		iwl_txq_gen2_tfd_unmap(trans, &txq->entries[idx].meta,
+				       iwl_txq_get_tfd(trans, txq, rd_ptr));
+	else
+		iwl_txq_gen1_tfd_unmap(trans, &txq->entries[idx].meta,
+				       txq, rd_ptr);
 
 	/* free SKB */
 	skb = txq->entries[idx].skb;

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

@@ -131,17 +131,8 @@ struct iwl_tso_hdr_page *get_page_hdr(struct iwl_trans *trans, size_t len,
 				      struct sk_buff *skb);
 #endif
 static inline u8 iwl_txq_gen1_tfd_get_num_tbs(struct iwl_trans *trans,
-					      void *_tfd)
+					      struct iwl_tfd *tfd)
 {
-	struct iwl_tfd *tfd;
-
-	if (trans->trans_cfg->gen2) {
-		struct iwl_tfh_tfd *tfh_tfd = _tfd;
-
-		return le16_to_cpu(tfh_tfd->num_tbs) & 0x1f;
-	}
-
-	tfd = (struct iwl_tfd *)_tfd;
 	return tfd->num_tbs & 0x1f;
 }