qcacld-3.0: enable ipa hw dynamic detection capabiliry

MODEM included platform and non-MODEM platform should use
the same binary. Then WLAN cannot disable IPA data path
through INI nor compile time.
WLAN host driver should dynamically detect IPA HW status and
should enable or disable IPA data path based on IPA HW status.

Change-Id: I43a673fcfc7ecfbd2d3ca488034dc4a84e20b258
CRs-fixed: 1078825

core/hdd/inc/wlan_hdd_ipa.h

@@ -102,6 +102,7 @@ int hdd_ipa_uc_ssr_deinit(void);
 void hdd_ipa_uc_force_pipe_shutdown(hdd_context_t *hdd_ctx);
 struct sk_buff *hdd_ipa_tx_packet_ipa(hdd_context_t *hdd_ctx,
 	struct sk_buff *skb, uint8_t session_id);
+bool hdd_ipa_is_present(hdd_context_t *hdd_ctx);
 #else
 static inline QDF_STATUS hdd_ipa_init(hdd_context_t *hdd_ctx)
 {
@@ -208,5 +209,21 @@ static inline struct sk_buff *hdd_ipa_tx_packet_ipa(hdd_context_t *hdd_ctx,
 {
 	return skb;
 }
+
+/**
+ * hdd_ipa_is_present() - get IPA hw status
+ * @hdd_ctx: pointer to hdd context
+ *
+ * ipa_uc_reg_rdyCB is not directly designed to check
+ * ipa hw status. This is an undocumented function which
+ * has confirmed with IPA team.
+ *
+ * Return: true - ipa hw present
+ *         false - ipa hw not present
+ */
+bool hdd_ipa_is_present(hdd_context_t *hdd_ctx)
+{
+	return false;
+}
 #endif /* IPA_OFFLOAD */
 #endif /* #ifndef HDD_IPA_H__ */

core/hdd/src/wlan_hdd_ipa.c

@@ -2801,6 +2801,26 @@ static void hdd_ipa_send_pkt_to_tl(
 
 }
 
+/**
+ * hdd_ipa_is_present() - get IPA hw status
+ * @hdd_ctx: pointer to hdd context
+ *
+ * ipa_uc_reg_rdyCB is not directly designed to check
+ * ipa hw status. This is an undocumented function which
+ * has confirmed with IPA team.
+ *
+ * Return: true - ipa hw present
+ *         false - ipa hw not present
+ */
+bool hdd_ipa_is_present(hdd_context_t *hdd_ctx)
+{
+	/* Check if ipa hw is enabled */
+	if (ipa_uc_reg_rdyCB(NULL) != -EPERM)
+		return true;
+	else
+		return false;
+}
+
 /**
  * hdd_ipa_pm_flush() - flush queued packets
  * @work: pointer to the scheduled work

core/hdd/src/wlan_hdd_main.c

@@ -6319,6 +6319,9 @@ static void hdd_override_ini_config(hdd_context_t *hdd_ctx)
 		hdd_ctx->config->Is11dSupportEnabled = enable_11d;
 		hdd_notice("Module enable_11d set to %d", enable_11d);
 	}
+
+	if (!hdd_ipa_is_present(hdd_ctx))
+		hdd_ctx->config->IpaConfig = 0;
 }
 
 /**