qcacmn: Map IPA tx buffers as part of IPA ready callback

Register IPA ready callback with IPA driver. The callback
sets ipa_is_ready flag in the host driver and kick starts
the ipa init sequence as part of which the Tx buffers are
mapped to IPA.
None of the IPA APIs are invoked until IPA ready registration
is complete.

Change-Id: I6570b2b347052164a274fbc22358ebf0719dcabf
CRs-Fixed: 2735107

dp/wifi3.0/dp_ipa.c

@@ -98,6 +98,9 @@ static QDF_STATUS __dp_ipa_handle_buf_smmu_mapping(struct dp_soc *soc,
 {
 	qdf_mem_info_t mem_map_table = {0};
 
+	if (!qdf_ipa_is_ready())
+		return QDF_STATUS_SUCCESS;
+
 	qdf_update_mem_map_table(soc->osdev, &mem_map_table,
 				 qdf_nbuf_get_frag_paddr(nbuf, 0),
 				 size);
@@ -155,6 +158,29 @@ QDF_STATUS dp_ipa_handle_rx_buf_smmu_mapping(struct dp_soc *soc,
 	return __dp_ipa_handle_buf_smmu_mapping(soc, nbuf, size, create);
 }
 
+static QDF_STATUS __dp_ipa_tx_buf_smmu_mapping(
+	struct dp_soc *soc,
+	struct dp_pdev *pdev,
+	bool create)
+{
+	uint32_t index;
+	QDF_STATUS ret;
+	uint32_t tx_buffer_cnt = soc->ipa_uc_tx_rsc.alloc_tx_buf_cnt;
+	qdf_nbuf_t nbuf;
+
+	for (index = 0; index < tx_buffer_cnt; index++) {
+		nbuf = (qdf_nbuf_t)
+			soc->ipa_uc_tx_rsc.tx_buf_pool_vaddr_unaligned[index];
+		if (!nbuf)
+			continue;
+		ret = __dp_ipa_handle_buf_smmu_mapping(
+				soc, nbuf,
+				skb_end_pointer(nbuf) - nbuf->data,
+				true);
+	}
+	return ret;
+}
+
 #ifdef RX_DESC_MULTI_PAGE_ALLOC
 static QDF_STATUS dp_ipa_handle_rx_buf_pool_smmu_mapping(struct dp_soc *soc,
 							 struct dp_pdev *pdev,
@@ -268,6 +294,7 @@ static void dp_tx_ipa_uc_detach(struct dp_soc *soc, struct dp_pdev *pdev)
 	int idx;
 	qdf_nbuf_t nbuf;
 	struct dp_ipa_resources *ipa_res;
+	bool is_ipa_ready = qdf_ipa_is_ready();
 
 	for (idx = 0; idx < soc->ipa_uc_tx_rsc.alloc_tx_buf_cnt; idx++) {
 		nbuf = (qdf_nbuf_t)
@@ -275,7 +302,7 @@ static void dp_tx_ipa_uc_detach(struct dp_soc *soc, struct dp_pdev *pdev)
 		if (!nbuf)
 			continue;
 
-		if (qdf_mem_smmu_s1_enabled(soc->osdev))
+		if (qdf_mem_smmu_s1_enabled(soc->osdev) && is_ipa_ready)
 			__dp_ipa_handle_buf_smmu_mapping(
 					soc, nbuf,
 					skb_end_pointer(nbuf) - nbuf->data,
@@ -424,12 +451,6 @@ static int dp_tx_ipa_uc_attach(struct dp_soc *soc, struct dp_pdev *pdev)
 
 		soc->ipa_uc_tx_rsc.tx_buf_pool_vaddr_unaligned[tx_buffer_count]
 			= (void *)nbuf;
-
-		if (qdf_mem_smmu_s1_enabled(soc->osdev))
-			__dp_ipa_handle_buf_smmu_mapping(
-					soc, nbuf,
-					skb_end_pointer(nbuf) - nbuf->data,
-					true);
 	}
 
 	hal_srng_access_end_unlocked(soc->hal_soc,
@@ -1967,4 +1988,26 @@ qdf_nbuf_t dp_ipa_handle_rx_reo_reinject(struct dp_soc *soc, qdf_nbuf_t nbuf)
 	return dp_ipa_frag_nbuf_linearize(soc, nbuf);
 }
 
+QDF_STATUS dp_ipa_tx_buf_smmu_mapping(
+	struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
+{
+	QDF_STATUS ret;
+
+	struct dp_soc *soc = cdp_soc_t_to_dp_soc(soc_hdl);
+	struct dp_pdev *pdev =
+		dp_get_pdev_from_soc_pdev_id_wifi3(soc, pdev_id);
+
+	if (!pdev) {
+		dp_err("%s invalid instance", __func__);
+		return QDF_STATUS_E_FAILURE;
+	}
+
+	if (!qdf_mem_smmu_s1_enabled(soc->osdev)) {
+		dp_debug("SMMU S1 disabled");
+		return QDF_STATUS_SUCCESS;
+	}
+	ret = __dp_ipa_tx_buf_smmu_mapping(soc, pdev, true);
+	return ret;
+}
+
 #endif