wifi: ath11k: refactor CE remap & unmap

Currently the logic that handles hw_params->ce_remap is inline code,
both for doing the remap and the unmap. An upcoming change needs to do
the unmap in a second place, so refactor the unmap logic into a
separate function. And although it is only called from one place,
refactor the remap logic as well to have functional symmetry.

No functional changes, compile tested only.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240430-ce-unmap-v1-1-e468328f95d9@quicinc.com

drivers/net/wireless/ath/ath11k/ahb.c

@@ -954,6 +954,36 @@ static int ath11k_ahb_setup_msa_resources(struct ath11k_base *ab)
 	return 0;
 }
 
+static int ath11k_ahb_ce_remap(struct ath11k_base *ab)
+{
+	const struct ce_remap *ce_remap = ab->hw_params.ce_remap;
+	struct platform_device *pdev = ab->pdev;
+
+	if (!ce_remap) {
+		/* no separate CE register space */
+		ab->mem_ce = ab->mem;
+		return 0;
+	}
+
+	/* ce register space is moved out of wcss unlike ipq8074 or ipq6018
+	 * and the space is not contiguous, hence remapping the CE registers
+	 * to a new space for accessing them.
+	 */
+	ab->mem_ce = ioremap(ce_remap->base, ce_remap->size);
+	if (!ab->mem_ce) {
+		dev_err(&pdev->dev, "ce ioremap error\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void ath11k_ahb_ce_unmap(struct ath11k_base *ab)
+{
+	if (ab->hw_params.ce_remap)
+		iounmap(ab->mem_ce);
+}
+
 static int ath11k_ahb_fw_resources_init(struct ath11k_base *ab)
 {
 	struct ath11k_ahb *ab_ahb = ath11k_ahb_priv(ab);
@@ -1146,21 +1176,9 @@ static int ath11k_ahb_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_core_free;
 
-	ab->mem_ce = ab->mem;
-
-	if (ab->hw_params.ce_remap) {
-		const struct ce_remap *ce_remap = ab->hw_params.ce_remap;
-		/* ce register space is moved out of wcss unlike ipq8074 or ipq6018
-		 * and the space is not contiguous, hence remapping the CE registers
-		 * to a new space for accessing them.
-		 */
-		ab->mem_ce = ioremap(ce_remap->base, ce_remap->size);
-		if (!ab->mem_ce) {
-			dev_err(&pdev->dev, "ce ioremap error\n");
-			ret = -ENOMEM;
-			goto err_core_free;
-		}
-	}
+	ret = ath11k_ahb_ce_remap(ab);
+	if (ret)
+		goto err_core_free;
 
 	ret = ath11k_ahb_fw_resources_init(ab);
 	if (ret)
@@ -1248,9 +1266,7 @@ static void ath11k_ahb_free_resources(struct ath11k_base *ab)
 	ath11k_ahb_release_smp2p_handle(ab);
 	ath11k_ahb_fw_resource_deinit(ab);
 	ath11k_ce_free_pipes(ab);
-
-	if (ab->hw_params.ce_remap)
-		iounmap(ab->mem_ce);
+	ath11k_ahb_ce_unmap(ab);
 
 	ath11k_core_free(ab);
 	platform_set_drvdata(pdev, NULL);