wifi: iwlwifi: use bc entries instead of bc table also for pre-ax210

iwlagn_scd_bc_tbl is used for pre-ax210 devices,
and iwl_gen3_bc_tbl_entry is used for ax210 and on. But there is no
difference between the the 22000 version and the AX210+ one.

In order to unify the two, as first step make iwlagn_scd_bc_tbl an entry
as well, and adjust the code. In a later patch both structures will be
unified.

Signed-off-by: Miri Korenblit <[email protected]>
Link: https://patch.msgid.link/20250511195137.645cd82ebf48.Iaa7e88179372d60ef31157e379737b5babe54012@changeid

Author: Miriam-Rachel

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

@@ -717,7 +717,7 @@ struct iwl_tfh_tfd {
 /* Fixed (non-configurable) rx data from phy */
 
 /**
- * struct iwlagn_scd_bc_tbl - scheduler byte count table
+ * struct iwlagn_scd_bc_tbl_entry - scheduler byte count table entry
  *	base physical address provided by SCD_DRAM_BASE_ADDR
  * For devices up to 22000:
  * @tfd_offset:
@@ -729,8 +729,8 @@ struct iwl_tfh_tfd {
  *		12-13 - number of 64 byte chunks
  *		14-16 - reserved
  */
-struct iwlagn_scd_bc_tbl {
-	__le16 tfd_offset[TFD_QUEUE_BC_SIZE];
+struct iwlagn_scd_bc_tbl_entry {
+	__le16 tfd_offset;
 } __packed;
 
 /**

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

@@ -3839,7 +3839,8 @@ iwl_trans_pcie_alloc(struct pci_dev *pdev,
 		trans_pcie->txqs.bc_tbl_size =
 			sizeof(struct iwl_gen3_bc_tbl_entry) * TFD_QUEUE_BC_SIZE_AX210;
 	else
-		trans_pcie->txqs.bc_tbl_size = sizeof(struct iwlagn_scd_bc_tbl);
+		trans_pcie->txqs.bc_tbl_size =
+			sizeof(struct iwlagn_scd_bc_tbl_entry) * TFD_QUEUE_BC_SIZE;
 	/*
 	 * For gen2 devices, we use a single allocation for each byte-count
 	 * table, but they're pretty small (1k) so use a DMA pool that we

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

@@ -587,12 +587,12 @@ static void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans *trans,
 		bc_ent = cpu_to_le16(len | (num_fetch_chunks << 14));
 		scd_bc_tbl_gen3[idx].tfd_offset = bc_ent;
 	} else {
-		struct iwlagn_scd_bc_tbl *scd_bc_tbl = txq->bc_tbl.addr;
+		struct iwlagn_scd_bc_tbl_entry *scd_bc_tbl = txq->bc_tbl.addr;
 
 		len = DIV_ROUND_UP(len, 4);
 		WARN_ON(len > 0xFFF);
 		bc_ent = cpu_to_le16(len | (num_fetch_chunks << 12));
-		scd_bc_tbl->tfd_offset[idx] = bc_ent;
+		scd_bc_tbl[idx].tfd_offset = bc_ent;
 	}
 }
 

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

@@ -796,6 +796,8 @@ int iwl_pcie_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq,
 	return -ENOMEM;
 }
 
+#define BC_TABLE_SIZE	(sizeof(struct iwlagn_scd_bc_tbl_entry) * TFD_QUEUE_BC_SIZE)
+
 /*
  * iwl_pcie_tx_alloc - allocate TX context
  * Allocate all Tx DMA structures and initialize them
@@ -810,7 +812,7 @@ static int iwl_pcie_tx_alloc(struct iwl_trans *trans)
 	if (WARN_ON(trans->mac_cfg->device_family >= IWL_DEVICE_FAMILY_AX210))
 		return -EINVAL;
 
-	bc_tbls_size *= sizeof(struct iwlagn_scd_bc_tbl);
+	bc_tbls_size *= BC_TABLE_SIZE;
 
 	/*It is not allowed to alloc twice, so warn when this happens.
 	 * We cannot rely on the previous allocation, so free and fail */
@@ -2065,7 +2067,7 @@ static void iwl_txq_gen1_update_byte_cnt_tbl(struct iwl_trans *trans,
 					     int num_tbs)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	struct iwlagn_scd_bc_tbl *scd_bc_tbl;
+	struct iwlagn_scd_bc_tbl_entry *scd_bc_tbl;
 	int write_ptr = txq->write_ptr;
 	int txq_id = txq->id;
 	u8 sec_ctl = 0;
@@ -2099,10 +2101,10 @@ static void iwl_txq_gen1_update_byte_cnt_tbl(struct iwl_trans *trans,
 
 	bc_ent = cpu_to_le16(len | (sta_id << 12));
 
-	scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
+	scd_bc_tbl[txq_id * BC_TABLE_SIZE + write_ptr].tfd_offset = bc_ent;
 
 	if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
-		scd_bc_tbl[txq_id].tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] =
+		scd_bc_tbl[txq_id * BC_TABLE_SIZE + TFD_QUEUE_SIZE_MAX + write_ptr].tfd_offset =
 			bc_ent;
 }
 
@@ -2312,7 +2314,7 @@ static void iwl_txq_gen1_inval_byte_cnt_tbl(struct iwl_trans *trans,
 					    int read_ptr)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	struct iwlagn_scd_bc_tbl *scd_bc_tbl = trans_pcie->txqs.scd_bc_tbls.addr;
+	struct iwlagn_scd_bc_tbl_entry *scd_bc_tbl = trans_pcie->txqs.scd_bc_tbls.addr;
 	int txq_id = txq->id;
 	u8 sta_id = 0;
 	__le16 bc_ent;
@@ -2326,10 +2328,10 @@ static void iwl_txq_gen1_inval_byte_cnt_tbl(struct iwl_trans *trans,
 
 	bc_ent = cpu_to_le16(1 | (sta_id << 12));
 
-	scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent;
+	scd_bc_tbl[txq_id * BC_TABLE_SIZE + read_ptr].tfd_offset = bc_ent;
 
 	if (read_ptr < TFD_QUEUE_SIZE_BC_DUP)
-		scd_bc_tbl[txq_id].tfd_offset[TFD_QUEUE_SIZE_MAX + read_ptr] =
+		scd_bc_tbl[txq_id * BC_TABLE_SIZE + TFD_QUEUE_SIZE_MAX + read_ptr].tfd_offset =
 			bc_ent;
 }