[dpdk-dev] [PATCH] i40e: Use one bit flag for all hardware detected RX packet errors

[Helin Zhang]

There were some bit flags of 0 for RX packet errors detected by hardware.
Actually only one bit of error flag is enough for all hardware detected
RX packet errors.

Signed-off-by: Helin Zhang <helin.zhang at intel.com>
---
 lib/librte_mbuf/rte_mbuf.h      |  6 +-----
 lib/librte_pmd_i40e/i40e_rxtx.c | 31 +++----------------------------
 2 files changed, 4 insertions(+), 33 deletions(-)

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 5899e5c..897fd26 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -80,11 +80,6 @@ extern "C" {
 #define PKT_RX_FDIR          (1ULL << 2)  /**< RX packet with FDIR match indicate. */
 #define PKT_RX_L4_CKSUM_BAD  (1ULL << 3)  /**< L4 cksum of RX pkt. is not OK. */
 #define PKT_RX_IP_CKSUM_BAD  (1ULL << 4)  /**< IP cksum of RX pkt. is not OK. */
-#define PKT_RX_EIP_CKSUM_BAD (0ULL << 0)  /**< External IP header checksum error. */
-#define PKT_RX_OVERSIZE      (0ULL << 0)  /**< Num of desc of an RX pkt oversize. */
-#define PKT_RX_HBUF_OVERFLOW (0ULL << 0)  /**< Header buffer overflow. */
-#define PKT_RX_RECIP_ERR     (0ULL << 0)  /**< Hardware processing error. */
-#define PKT_RX_MAC_ERR       (0ULL << 0)  /**< MAC error. */
 #define PKT_RX_IPV4_HDR      (1ULL << 5)  /**< RX packet with IPv4 header. */
 #define PKT_RX_IPV4_HDR_EXT  (1ULL << 6)  /**< RX packet with extended IPv4 header. */
 #define PKT_RX_IPV6_HDR      (1ULL << 7)  /**< RX packet with IPv6 header. */
@@ -95,6 +90,7 @@ extern "C" {
 #define PKT_RX_TUNNEL_IPV6_HDR (1ULL << 12) /**< RX tunnel packet with IPv6 header. */
 #define PKT_RX_FDIR_ID       (1ULL << 13) /**< FD id reported if FDIR match. */
 #define PKT_RX_FDIR_FLX      (1ULL << 14) /**< Flexible bytes reported if FDIR match. */
+#define PKT_RX_ERR_HW        (1ULL << 15) /**< RX packet error detected by hardware. */
 
 #define PKT_TX_VLAN_PKT      (1ULL << 55) /**< TX packet is a 802.1q VLAN packet. */
 #define PKT_TX_IP_CKSUM      (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */
diff --git a/lib/librte_pmd_i40e/i40e_rxtx.c b/lib/librte_pmd_i40e/i40e_rxtx.c
index cce6911..3b2195d 100644
--- a/lib/librte_pmd_i40e/i40e_rxtx.c
+++ b/lib/librte_pmd_i40e/i40e_rxtx.c
@@ -115,35 +115,10 @@ i40e_rxd_status_to_pkt_flags(uint64_t qword)
 static inline uint64_t
 i40e_rxd_error_to_pkt_flags(uint64_t qword)
 {
-	uint64_t flags = 0;
-	uint64_t error_bits = (qword >> I40E_RXD_QW1_ERROR_SHIFT);
-
-#define I40E_RX_ERR_BITS 0x3f
-	if (likely((error_bits & I40E_RX_ERR_BITS) == 0))
-		return flags;
-	/* If RXE bit set, all other status bits are meaningless */
-	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_RXE_SHIFT))) {
-		flags |= PKT_RX_MAC_ERR;
-		return flags;
-	}
-
-	/* If RECIPE bit set, all other status indications should be ignored */
-	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_RECIPE_SHIFT))) {
-		flags |= PKT_RX_RECIP_ERR;
-		return flags;
-	}
-	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_HBO_SHIFT)))
-		flags |= PKT_RX_HBUF_OVERFLOW;
-	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_IPE_SHIFT)))
-		flags |= PKT_RX_IP_CKSUM_BAD;
-	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_L4E_SHIFT)))
-		flags |= PKT_RX_L4_CKSUM_BAD;
-	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_EIPE_SHIFT)))
-		flags |= PKT_RX_EIP_CKSUM_BAD;
-	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_OVERSIZE_SHIFT)))
-		flags |= PKT_RX_OVERSIZE;
+	if (unlikely(qword & I40E_RXD_QW1_ERROR_MASK))
+		return PKT_RX_ERR_HW;
 
-	return flags;
+	return 0;
 }
 
 /* Translate pkt types to pkt flags */
-- 
1.8.1.4