net/ice/base: add inner VLAN protocol type for QinQ filter

[dpdk.git] / drivers / net / sfc / sfc_ef100.h

diff --git a/drivers/net/sfc/sfc_ef100.h b/drivers/net/sfc/sfc_ef100.h
index 6da6cfa..5e2052d 100644 (file)
--- a/drivers/net/sfc/sfc_ef100.h
+++ b/drivers/net/sfc/sfc_ef100.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  *
- * Copyright(c) 2019-2020 Xilinx, Inc.
+ * Copyright(c) 2019-2021 Xilinx, Inc.
  * Copyright(c) 2018-2019 Solarflare Communications Inc.
  *
  * This software was jointly developed between OKTET Labs (under contract
@@ -14,6 +14,34 @@
 extern "C" {
 #endif
 
+/**
+ * Prime event queue to allow processed events to be reused.
+ *
+ * @param evq_prime    Global address of the prime register
+ * @param evq_hw_index Event queue index
+ * @param evq_read_ptr Masked event qeueu read pointer
+ */
+static inline void
+sfc_ef100_evq_prime(volatile void *evq_prime, unsigned int evq_hw_index,
+                   unsigned int evq_read_ptr)
+{
+       efx_dword_t dword;
+
+       EFX_POPULATE_DWORD_2(dword,
+                            ERF_GZ_EVQ_ID, evq_hw_index,
+                            ERF_GZ_IDX, evq_read_ptr);
+
+       /*
+        * EvQ prime on EF100 allows HW to reuse descriptors. So we
+        * should be sure that event descriptor reads are done.
+        * However, there is implicit data dependency here since we
+        * move past event if we have found out that the event has
+        * come (i.e. we read it) and we have processed it.
+        * So, no extra barriers are required here.
+        */
+       rte_write32_relaxed(dword.ed_u32[0], evq_prime);
+}
+
 static inline bool
 sfc_ef100_ev_present(const efx_qword_t *ev, bool phase_bit)
 {