wifi: ath12k: Refactor data path cmem init

Move the data path Tx and Rx descriptor primary page table CMEM
configuration into a helper function. This will make the code more
scalable for configuring partner device in support of multi-device MLO.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00188-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240411102226.4045323-5-quic_periyasa@quicinc.com

drivers/net/wireless/ath/ath12k/dp.c

@@ -14,6 +14,11 @@
 #include "peer.h"
 #include "dp_mon.h"
 
+enum ath12k_dp_desc_type {
+	ATH12K_DP_TX_DESC,
+	ATH12K_DP_RX_DESC,
+};
+
 static void ath12k_dp_htt_htc_tx_complete(struct ath12k_base *ab,
 					  struct sk_buff *skb)
 {
@@ -1455,11 +1460,41 @@ static int ath12k_dp_cc_desc_init(struct ath12k_base *ab)
 	return 0;
 }
 
+static int ath12k_dp_cmem_init(struct ath12k_base *ab,
+			       struct ath12k_dp *dp,
+			       enum ath12k_dp_desc_type type)
+{
+	u32 cmem_base;
+	int i, start, end;
+
+	cmem_base = ab->qmi.dev_mem[ATH12K_QMI_DEVMEM_CMEM_INDEX].start;
+
+	switch (type) {
+	case ATH12K_DP_TX_DESC:
+		start = ATH12K_TX_SPT_PAGE_OFFSET;
+		end = start + ATH12K_NUM_TX_SPT_PAGES;
+		break;
+	case ATH12K_DP_RX_DESC:
+		start = ATH12K_RX_SPT_PAGE_OFFSET;
+		end = start + ATH12K_NUM_RX_SPT_PAGES;
+		break;
+	default:
+		ath12k_err(ab, "invalid descriptor type %d in cmem init\n", type);
+		return -EINVAL;
+	}
+
+	/* Write to PPT in CMEM */
+	for (i = start; i < end; i++)
+		ath12k_hif_write32(ab, cmem_base + ATH12K_PPT_ADDR_OFFSET(i),
+				   dp->spt_info[i].paddr >> ATH12K_SPT_4K_ALIGN_OFFSET);
+
+	return 0;
+}
+
 static int ath12k_dp_cc_init(struct ath12k_base *ab)
 {
 	struct ath12k_dp *dp = &ab->dp;
 	int i, ret = 0;
-	u32 cmem_base;
 
 	INIT_LIST_HEAD(&dp->rx_desc_free_list);
 	spin_lock_init(&dp->rx_desc_lock);
@@ -1482,8 +1517,6 @@ static int ath12k_dp_cc_init(struct ath12k_base *ab)
 		return -ENOMEM;
 	}
 
-	cmem_base = ab->qmi.dev_mem[ATH12K_QMI_DEVMEM_CMEM_INDEX].start;
-
 	for (i = 0; i < dp->num_spt_pages; i++) {
 		dp->spt_info[i].vaddr = dma_alloc_coherent(ab->dev,
 							   ATH12K_PAGE_SIZE,
@@ -1500,10 +1533,18 @@ static int ath12k_dp_cc_init(struct ath12k_base *ab)
 			ret = -EINVAL;
 			goto free;
 		}
+	}
 
-		/* Write to PPT in CMEM */
-		ath12k_hif_write32(ab, cmem_base + ATH12K_PPT_ADDR_OFFSET(i),
-				   dp->spt_info[i].paddr >> ATH12K_SPT_4K_ALIGN_OFFSET);
+	ret = ath12k_dp_cmem_init(ab, dp, ATH12K_DP_TX_DESC);
+	if (ret) {
+		ath12k_warn(ab, "HW CC Tx cmem init failed %d", ret);
+		goto free;
+	}
+
+	ret = ath12k_dp_cmem_init(ab, dp, ATH12K_DP_RX_DESC);
+	if (ret) {
+		ath12k_warn(ab, "HW CC Rx cmem init failed %d", ret);
+		goto free;
 	}
 
 	ret = ath12k_dp_cc_desc_init(ab);