From 5a2a9e11a8f3f4d82e9d451a2fe06eba9e8b39fc Mon Sep 17 00:00:00 2001
From: Etan Cohen <etancohen@google.com>
Date: Thu, 24 May 2018 17:47:05 -0700
Subject: [HDM] Add API to check for STA+AP concurrency

Add API which checks for availability of STA+AP concurrency (>0 STAs
and >0 APs).

Bug: 80251951
Test: unit tests on 4 chip configurations
Change-Id: I966c522f5a629849ed235803bbb18f1f3e075534
---
 .../com/android/server/wifi/HalDeviceManager.java  | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)

(limited to 'service')

diff --git a/service/java/com/android/server/wifi/HalDeviceManager.java b/service/java/com/android/server/wifi/HalDeviceManager.java
index 3c61217d7..f570ffcb5 100644
--- a/service/java/com/android/server/wifi/HalDeviceManager.java
+++ b/service/java/com/android/server/wifi/HalDeviceManager.java
@@ -204,6 +204,16 @@ public class HalDeviceManager {
         return getSupportedIfaceTypesInternal(chip);
     }
 
+    /**
+     * Checks whether the device (the combination of all Wi-Fi chips on the device) supports a
+     * concurrent combination of 1 or more STAs and 1 or more APs.
+     *
+     * @return true if STA+AP concurrency is supported, false otherwise.
+     */
+    public boolean isConcurrentStaPlusApSupported() {
+        return isConcurrentStaPlusApSupportedInternal();
+    }
+
     // interface-specific behavior
 
     /**
@@ -1313,6 +1323,49 @@ public class HalDeviceManager {
         return results;
     }
 
+    private boolean isConcurrentStaPlusApSupportedInternal() {
+        if (mDbg) Log.d(TAG, "isConcurrentStaPlusApSupportedInternal");
+
+        synchronized (mLock) {
+            WifiChipInfo[] chipInfos = getAllChipInfo();
+            if (chipInfos == null) {
+                Log.e(TAG, "isConcurrentStaPlusApSupportedInternal: no chip info found");
+                stopWifi(); // major error: shutting down
+                return false;
+            }
+
+            if (!validateInterfaceCache(chipInfos)) {
+                Log.e(TAG, "isConcurrentStaPlusApSupportedInternal: local cache is invalid!");
+                stopWifi(); // major error: shutting down
+                return false;
+            }
+
+            // check whether any chip individually supports AP+STA
+            // TODO b/80270202: this does not fully handle multi-chip behavior
+            for (WifiChipInfo chipInfo : chipInfos) {
+                for (IWifiChip.ChipMode chipMode : chipInfo.availableModes) {
+                    for (IWifiChip.ChipIfaceCombination chipIfaceCombo : chipMode
+                            .availableCombinations) {
+                        int[][] expandedIfaceCombos = expandIfaceCombos(chipIfaceCombo);
+                        if (VDBG) {
+                            Log.d(TAG, chipIfaceCombo + " expands to " + Arrays.deepToString(
+                                    expandedIfaceCombos));
+                        }
+
+                        for (int[] expandedIfaceCombo : expandedIfaceCombos) {
+                            if (expandedIfaceCombo[IfaceType.STA] > 0
+                                    && expandedIfaceCombo[IfaceType.AP] > 0) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        return false;
+    }
+
     private IWifiIface createIface(int ifaceType, boolean lowPriority,
             InterfaceDestroyedListener destroyedListener, Handler handler) {
         if (mDbg) {
-- 
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