i40evf: support Rx interrupt

[dpdk.git] / drivers / net / i40e / i40e_ethdev.h

diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
index eff3adb..d281935 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -162,6 +162,11 @@ enum i40e_flxpld_layer_idx {
 #define I40E_MISC_VEC_ID                RTE_INTR_VEC_ZERO_OFFSET
 #define I40E_RX_VEC_START               RTE_INTR_VEC_RXTX_OFFSET
 
+/* Default queue interrupt throttling time in microseconds */
+#define I40E_ITR_INDEX_DEFAULT          0
+#define I40E_QUEUE_ITR_INTERVAL_DEFAULT 32 /* 32 us */
+#define I40E_QUEUE_ITR_INTERVAL_MAX     8160 /* 8160 us */
+
 struct i40e_adapter;
 
 /**
@@ -638,6 +643,16 @@ i40e_align_floor(int n)
        return 1 << (sizeof(n) * CHAR_BIT - 1 - __builtin_clz(n));
 }
 
+static inline uint16_t
+i40e_calc_itr_interval(int16_t interval)
+{
+       if (interval < 0 || interval > I40E_QUEUE_ITR_INTERVAL_MAX)
+               interval = I40E_QUEUE_ITR_INTERVAL_DEFAULT;
+
+       /* Convert to hardware count, as writing each 1 represents 2 us */
+       return (interval / 2);
+}
+
 #define I40E_VALID_FLOW(flow_type) \
        ((flow_type) == RTE_ETH_FLOW_FRAG_IPV4 || \
        (flow_type) == RTE_ETH_FLOW_NONFRAG_IPV4_TCP || \