fm10k: allow to disable vector driver

fm10k driver will meet compile error on non-x86 platforms due to
SSE instructions. Original implementation didn't have switch to
turn off vPMD.
The improvement introduces a macro to turn on/off vPMD functions,
it's on by default. On non-x86 platforms, it can simply be turned
off to fix compile issue.

Signed-off-by: Chen Jing D(Mark) <jing.d.chen@intel.com>

config/common_linuxapp

@@ -206,6 +206,7 @@ CONFIG_RTE_LIBRTE_FM10K_DEBUG_TX=n
 CONFIG_RTE_LIBRTE_FM10K_DEBUG_TX_FREE=n
 CONFIG_RTE_LIBRTE_FM10K_DEBUG_DRIVER=n
 CONFIG_RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE=y
+CONFIG_RTE_LIBRTE_FM10K_INC_VECTOR=y
 
 #
 # Compile burst-oriented Mellanox ConnectX-3 (MLX4) PMD

drivers/net/fm10k/Makefile

@@ -93,7 +93,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += fm10k_common.c
 SRCS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += fm10k_mbx.c
 SRCS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += fm10k_vf.c
 SRCS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += fm10k_api.c
-SRCS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += fm10k_rxtx_vec.c
+SRCS-$(CONFIG_RTE_LIBRTE_FM10K_INC_VECTOR) += fm10k_rxtx_vec.c
 
 # this lib depends upon:
 DEPDIRS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += lib/librte_eal lib/librte_ether

drivers/net/fm10k/fm10k.h

@@ -129,6 +129,9 @@
 #define RTE_FM10K_TX_MAX_FREE_BUF_SZ    64
 #define RTE_FM10K_DESCS_PER_LOOP    4
 
+#define FM10K_SIMPLE_TX_FLAG ((uint32_t)ETH_TXQ_FLAGS_NOMULTSEGS | \
+				ETH_TXQ_FLAGS_NOOFFLOADS)
+
 struct fm10k_macvlan_filter_info {
 	uint16_t vlan_num;       /* Total VLAN number */
 	uint16_t mac_num;        /* Total mac number */
@@ -354,4 +357,6 @@ uint16_t fm10k_recv_scattered_pkts_vec(void *, struct rte_mbuf **,
 uint16_t fm10k_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
 		uint16_t nb_pkts);
 void fm10k_txq_vec_setup(struct fm10k_tx_queue *txq);
+int fm10k_tx_vec_condition_check(struct fm10k_tx_queue *txq);
+
 #endif

drivers/net/fm10k/fm10k_ethdev.c

@@ -55,9 +55,6 @@
 #define CHARS_PER_UINT32 (sizeof(uint32_t))
 #define BIT_MASK_PER_UINT32 ((1 << CHARS_PER_UINT32) - 1)
 
-#define FM10K_SIMPLE_TX_FLAG ((uint32_t)ETH_TXQ_FLAGS_NOMULTSEGS | \
-				ETH_TXQ_FLAGS_NOOFFLOADS)
-
 static void fm10k_close_mbx_service(struct fm10k_hw *hw);
 static void fm10k_dev_promiscuous_enable(struct rte_eth_dev *dev);
 static void fm10k_dev_promiscuous_disable(struct rte_eth_dev *dev);
@@ -132,6 +129,65 @@ fm10k_mbx_unlock(struct fm10k_hw *hw)
 	rte_spinlock_unlock(FM10K_DEV_PRIVATE_TO_MBXLOCK(hw->back));
 }
 
+/* Stubs needed for linkage when vPMD is disabled */
+int __attribute__((weak))
+fm10k_rx_vec_condition_check(__rte_unused struct rte_eth_dev *dev)
+{
+	return -1;
+}
+
+uint16_t __attribute__((weak))
+fm10k_recv_pkts_vec(
+	__rte_unused void *rx_queue,
+	__rte_unused struct rte_mbuf **rx_pkts,
+	__rte_unused uint16_t nb_pkts)
+{
+	return 0;
+}
+
+uint16_t __attribute__((weak))
+fm10k_recv_scattered_pkts_vec(
+		__rte_unused void *rx_queue,
+		__rte_unused struct rte_mbuf **rx_pkts,
+		__rte_unused uint16_t nb_pkts)
+{
+	return 0;
+}
+
+int __attribute__((weak))
+fm10k_rxq_vec_setup(__rte_unused struct fm10k_rx_queue *rxq)
+
+{
+	return -1;
+}
+
+void __attribute__((weak))
+fm10k_rx_queue_release_mbufs_vec(
+		__rte_unused struct fm10k_rx_queue *rxq)
+{
+	return;
+}
+
+void __attribute__((weak))
+fm10k_txq_vec_setup(__rte_unused struct fm10k_tx_queue *txq)
+{
+	return;
+}
+
+int __attribute__((weak))
+fm10k_tx_vec_condition_check(__rte_unused struct fm10k_tx_queue *txq)
+{
+	return -1;
+}
+
+uint16_t __attribute__((weak))
+fm10k_xmit_pkts_vec(__rte_unused void *tx_queue,
+		__rte_unused struct rte_mbuf **tx_pkts,
+		__rte_unused uint16_t nb_pkts)
+{
+	return 0;
+}
+
 /*
  * reset queue to initial state, allocate software buffers used when starting
  * device.
@@ -2394,8 +2450,8 @@ fm10k_set_tx_function(struct rte_eth_dev *dev)
 
 	for (i = 0; i < dev->data->nb_tx_queues; i++) {
 		txq = dev->data->tx_queues[i];
-		if ((txq->txq_flags & FM10K_SIMPLE_TX_FLAG) !=
-			FM10K_SIMPLE_TX_FLAG) {
+		/* Check if Vector Tx is satisfied */
+		if (fm10k_tx_vec_condition_check(txq)) {
 			use_sse = 0;
 			break;
 		}

drivers/net/fm10k/fm10k_rxtx_vec.c

@@ -641,6 +641,16 @@ fm10k_txq_vec_setup(struct fm10k_tx_queue *txq)
 	txq->ops = &vec_txq_ops;
 }
 
+int __attribute__((cold))
+fm10k_tx_vec_condition_check(struct fm10k_tx_queue *txq)
+{
+	/* Vector TX can't offload any features yet */
+	if ((txq->txq_flags & FM10K_SIMPLE_TX_FLAG) != FM10K_SIMPLE_TX_FLAG)
+		return -1;
+
+	return 0;
+}
+
 static inline void
 vtx1(volatile struct fm10k_tx_desc *txdp,
 		struct rte_mbuf *pkt, uint64_t flags)