diff --git a/fw/htt.h b/fw/htt.h
index 73198698a3fc..8c6472c5cc46 100644
--- a/fw/htt.h
+++ b/fw/htt.h
@@ -274,9 +274,10 @@
  * 3.144 Add svc_inst_req_type in htt_h2t_mpduq_or_msduq_info.
  * 3.145 Add 3rd bit for rx_hdr_len in RX_RING_SELECTION_CFG
  * 3.146 Add HTT_RXOLE_ASE_STATUS_RING def.
+ * 3.147 Add direct_refill flag in SRING_SETUP msg.
  */
 #define HTT_CURRENT_VERSION_MAJOR 3
-#define HTT_CURRENT_VERSION_MINOR 146
+#define HTT_CURRENT_VERSION_MINOR 147
 
 #define HTT_NUM_TX_FRAG_DESC  1024
 
@@ -5494,7 +5495,8 @@ PREPACK struct htt_sring_setup_t {
              prefetch_timer_cfg:  3,
              response_required:   1,
              ipa_drop_flag:      1,
-             reserved1:          11;
+             direct_refill:      1,
+             reserved1:          10;
     A_UINT32 ipa_drop_low_threshold:    8,
              ipa_drop_high_threshold:   8,
              reserved:                  16;
@@ -5852,6 +5854,27 @@ enum htt_srng_ring_id {
             ((_var) |= ((_val) << HTT_SRING_SETUP_RESPONSE_REQUIRED_S)); \
         } while (0)
 
+#define HTT_SRING_SETUP_IPA_DROP_FLAG_M        0x00100000
+#define HTT_SRING_SETUP_IPA_DROP_FLAG_S        20
+#define HTT_SRING_SETUP_IPA_DROP_FLAG_GET(_var) \
+        (((_var) & HTT_SRING_SETUP_IPA_DROP_FLAG_M) >> \
+                HTT_SRING_SETUP_IPA_DROP_FLAG_S)
+#define HTT_SRING_SETUP_IPA_DROP_FLAG_SET(_var, _val) \
+        do { \
+            HTT_CHECK_SET_VAL(HTT_SRING_SETUP_IPA_DROP_FLAG, _val); \
+            ((_var) |= ((_val) << HTT_SRING_SETUP_IPA_DROP_FLAG_S)); \
+        } while (0)
+
+#define HTT_SRING_SETUP_DIRECT_REFILL_M        0x00200000
+#define HTT_SRING_SETUP_DIRECT_REFILL_S        21
+#define HTT_SRING_SETUP_DIRECT_REFILL_GET(_var) \
+        (((_var) & HTT_SRING_SETUP_DIRECT_REFILL_M) >> \
+                HTT_SRING_SETUP_DIRECT_REFILL_S)
+#define HTT_SRING_SETUP_DIRECT_REFILL_SET(_var, _val) \
+        do { \
+            HTT_CHECK_SET_VAL(HTT_SRING_SETUP_DIRECT_REFILL, _val); \
+            ((_var) |= ((_val) << HTT_SRING_SETUP_DIRECT_REFILL_S)); \
+        } while (0)
 
 /**
  * @brief host -> target RX ring selection config message
diff --git a/fw/wmi_services.h b/fw/wmi_services.h
index 6adcdbfac4e5..4a53da1202d4 100644
--- a/fw/wmi_services.h
+++ b/fw/wmi_services.h
@@ -738,6 +738,7 @@ typedef  enum  {
 
     WMI_SERVICE_CCK_RX_SUPPORT_5GHZ = 475, /* Indicates FW supports CCK RX in 5 GHz band */
     WMI_SERVICE_CCK_TX_SUPPORT_5GHZ = 476, /* Indicates FW supports CCK TX in 5 GHZ band */
+    WMI_SERVICE_DIRECT_REFILL_SUPPORT = 477, /* Indicates FW supports direct refill for RX buffer ring */
 
 
     WMI_MAX_EXT2_SERVICE
diff --git a/fw/wmi_unified.h b/fw/wmi_unified.h
index 333da66baef9..03c69db4bb15 100644
--- a/fw/wmi_unified.h
+++ b/fw/wmi_unified.h
@@ -5106,8 +5106,16 @@ typedef struct {
      *      country supports SP regulatory rules.
      *      Refer to the below defintions of WMI_RSRC_CFG_HOST_SERVICE_FLAG
      *      AFC_TRIGGER_ON_DEFAULT_CC_EVENT_GET and _SET macros.
+     *  Bit 23
+     *      This bit will set by host to inform FW that direct refill to
+     *      SW2RxDMA ring is supported by the host and the ring which is
+     *      directly refilled by HOST will be indicated in the
+     *      HTT_H2T_MSG_TYPE_SRING_SETUP and FW should refill the Rx buffers
+     *      to the secondary refill ring.
+     *      Refer to the below definitions of WMI_RSRC_CFG_HOST_SERVICE_FLAG
+     *      DIRECT_REFILL_SUPPORT_GET and _SET macros.
      *
-     *  Bits 31:23 - Reserved
+     *  Bits 31:24 - Reserved
      */
     A_UINT32 host_service_flags;
 
@@ -5686,6 +5694,12 @@ typedef struct {
 #define WMI_RSRC_CFG_HOST_SERVICE_FLAG_AFC_TRIGGER_ON_DEFAULT_CC_EVENT_SET(host_service_flags, val) \
         WMI_SET_BITS(host_service_flags, 22, 1, val)
 
+/* This bit is used to inform FW that HOST supports direct Rx buffers refill to the SW2RxDMA ring*/
+#define WMI_RSRC_CFG_HOST_SERVICE_FLAG_DIRECT_REFILL_SUPPORT_GET(host_service_flags) \
+         WMI_GET_BITS(host_service_flags, 23, 1)
+#define WMI_RSRC_CFG_HOST_SERVICE_FLAG_DIRECT_REFILL_SUPPORT_SET(host_service_flags, val) \
+         WMI_SET_BITS(host_service_flags, 23, 1, val)
+
 
 #define WMI_RSRC_CFG_CARRIER_CFG_CHARTER_ENABLE_GET(carrier_config) \
     WMI_GET_BITS(carrier_config, 0, 1)
diff --git a/fw/wmi_version.h b/fw/wmi_version.h
index c04994234144..744f2302c459 100644
--- a/fw/wmi_version.h
+++ b/fw/wmi_version.h
@@ -37,7 +37,7 @@
 #define __WMI_VER_MINOR_    0
 /** WMI revision number has to be incremented when there is a
  *  change that may or may not break compatibility. */
-#define __WMI_REVISION_ 1670
+#define __WMI_REVISION_ 1671
 
 /** The Version Namespace should not be normally changed. Only
  *  host and firmware of the same WMI namespace will work