[PATCH 2/2] net/ixgbe: remove option to disable offload flags

[Konstantin Ananyev <konstantin.ananyev@intel.com>]

Having packets received without any offload flags given in the mbuf is not
very useful, and performance tests with testpmd indicates little
benefit is got with the current code by turning off the flags. This makes
the build-time option pointless, so we can remove it.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---
 config/common_base                        |  1 -
 doc/guides/nics/ixgbe.rst                 | 18 ------------------
 drivers/net/ixgbe/ixgbe_rxtx_vec_common.h |  7 -------
 drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c   | 11 -----------
 drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c    | 27 ---------------------------
 5 files changed, 64 deletions(-)

diff --git a/config/common_base b/config/common_base
index fc75c63..8d9560f 100644
--- a/config/common_base
+++ b/config/common_base
@@ -173,7 +173,6 @@ CONFIG_RTE_LIBRTE_IXGBE_DEBUG_TX_FREE=n
 CONFIG_RTE_LIBRTE_IXGBE_DEBUG_DRIVER=n
 CONFIG_RTE_LIBRTE_IXGBE_PF_DISABLE_STRIP_CRC=n
 CONFIG_RTE_IXGBE_INC_VECTOR=y
-CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=y
 
 #
 # Compile burst-oriented I40E PMD driver
diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst
index 1a4aa48..130765b 100644
--- a/doc/guides/nics/ixgbe.rst
+++ b/doc/guides/nics/ixgbe.rst
@@ -95,9 +95,6 @@ Other features are supported using optional MACRO configuration. They include:
 
 *   HW extend dual VLAN
 
-*   Enabled by RX_OLFLAGS (RTE_IXGBE_RX_OLFLAGS_ENABLE=y)
-
-
 To guarantee the constraint, configuration flags in dev_conf.rxmode will be checked:
 
 *   hw_vlan_strip
@@ -156,21 +153,6 @@ The declarations for the API functions are in the header ``rte_pmd_ixgbe.h``.
 Sample Application Notes
 ------------------------
 
-testpmd
-~~~~~~~
-
-By default, using CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=y:
-
-.. code-block:: console
-
-    ./x86_64-native-linuxapp-gcc/app/testpmd -l 8-9 -n 4 -- -i --burst=32 --rxfreet=32 --mbcache=250 --txpt=32 --rxht=8 --rxwt=0 --txfreet=32 --txrst=32 --txqflags=0xf01
-
-When CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=n, better performance can be achieved:
-
-.. code-block:: console
-
-    ./x86_64-native-linuxapp-gcc/app/testpmd -l 8-9 -n 4 -- -i --burst=32 --rxfreet=32 --mbcache=250 --txpt=32 --rxht=8 --rxwt=0 --txfreet=32 --txrst=32 --txqflags=0xf01 --disable-hw-vlan
-
 l3fwd
 ~~~~~
 
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h b/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h
index a83afe5..1c34bb5 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h
@@ -310,13 +310,6 @@ ixgbe_rx_vec_dev_conf_condition_check_default(struct rte_eth_dev *dev)
 	struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
 	struct rte_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf;
 
-#ifndef RTE_IXGBE_RX_OLFLAGS_ENABLE
-	/* whithout rx ol_flags, no VP flag report */
-	if (rxmode->hw_vlan_strip != 0 ||
-	    rxmode->hw_vlan_extend != 0)
-		return -1;
-#endif
-
 	/* no fdir support */
 	if (fconf->mode != RTE_FDIR_MODE_NONE)
 		return -1;
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
index bc8924f..517b8c7 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
@@ -111,14 +111,6 @@ ixgbe_rxq_rearm(struct ixgbe_rx_queue *rxq)
 	IXGBE_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
 }
 
-/* Handling the offload flags (olflags) field takes computation
- * time when receiving packets. Therefore we provide a flag to disable
- * the processing of the olflags field when they are not needed. This
- * gives improved performance, at the cost of losing the offload info
- * in the received packet
- */
-#ifdef RTE_IXGBE_RX_OLFLAGS_ENABLE
-
 #define VTAG_SHIFT     (3)
 
 static inline void
@@ -167,9 +159,6 @@ desc_to_olflags_v(uint8x16x2_t sterr_tmp1, uint8x16x2_t sterr_tmp2,
 	rx_pkts[2]->ol_flags = vol.e[2];
 	rx_pkts[3]->ol_flags = vol.e[3];
 }
-#else
-#define desc_to_olflags_v(sterr_tmp1, sterr_tmp2, staterr, rx_pkts)
-#endif
 
 /*
  * vPMD raw receive routine, only accept(nb_pkts >= RTE_IXGBE_DESCS_PER_LOOP)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
index 49536c1..28c0ca6 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
@@ -86,20 +86,6 @@ ixgbe_rxq_rearm(struct ixgbe_rx_queue *rxq)
 		mb0 = rxep[0].mbuf;
 		mb1 = rxep[1].mbuf;
 
-#ifndef RTE_IXGBE_RX_OLFLAGS_ENABLE
-		{
-			uintptr_t p0, p1;
-			/*
-			 * Flush mbuf with pkt template.
-			 * Data to be rearmed is 6 bytes long.
-			 */
-			p0 = (uintptr_t)&mb0->rearm_data;
-			*(uint64_t *)p0 = rxq->mbuf_initializer;
-			p1 = (uintptr_t)&mb1->rearm_data;
-			*(uint64_t *)p1 = rxq->mbuf_initializer;
-		}
-#endif
-
 		/* load buf_addr(lo 64bit) and buf_physaddr(hi 64bit) */
 		vaddr0 = _mm_loadu_si128((__m128i *)&(mb0->buf_addr));
 		vaddr1 = _mm_loadu_si128((__m128i *)&(mb1->buf_addr));
@@ -134,14 +120,6 @@ ixgbe_rxq_rearm(struct ixgbe_rx_queue *rxq)
 	IXGBE_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
 }
 
-/* Handling the offload flags (olflags) field takes computation
- * time when receiving packets. Therefore we provide a flag to disable
- * the processing of the olflags field when they are not needed. This
- * gives improved performance, at the cost of losing the offload info
- * in the received packet
- */
-#ifdef RTE_IXGBE_RX_OLFLAGS_ENABLE
-
 static inline void
 desc_to_olflags_v(__m128i descs[4], __m128i mbuf_init, uint8_t vlan_flags,
 	struct rte_mbuf **rx_pkts)
@@ -246,11 +224,6 @@ desc_to_olflags_v(__m128i descs[4], __m128i mbuf_init, uint8_t vlan_flags,
 	_mm_store_si128((__m128i *)&rx_pkts[2]->rearm_data, rearm2);
 	_mm_store_si128((__m128i *)&rx_pkts[3]->rearm_data, rearm3);
 }
-#else
-#define desc_to_olflags_v(desc, vlan_flags, rx_pkts) do { \
-		RTE_SET_USED(vlan_flags); \
-	} while (0)
-#endif
 
 /*
  * vPMD raw receive routine, only accept(nb_pkts >= RTE_IXGBE_DESCS_PER_LOOP)
-- 
2.5.0