Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 352 insertions, 0 deletions

diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
new file mode 100644
index 00000000..0e2b607d
--- /dev/null
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -0,0 +1,352 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright 2015 6WIND S.A.
+ *   Copyright 2015 Mellanox.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of 6WIND S.A. nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef RTE_PMD_MLX5_RXTX_H_
+#define RTE_PMD_MLX5_RXTX_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* Verbs header. */
+/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-pedantic"
+#endif
+#include <infiniband/verbs.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-pedantic"
+#endif
+
+/* DPDK headers don't like -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-pedantic"
+#endif
+#include <rte_mbuf.h>
+#include <rte_mempool.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-pedantic"
+#endif
+
+#include "mlx5_utils.h"
+#include "mlx5.h"
+#include "mlx5_autoconf.h"
+#include "mlx5_defs.h"
+
+struct mlx5_rxq_stats {
+	unsigned int idx; /**< Mapping index. */
+#ifdef MLX5_PMD_SOFT_COUNTERS
+	uint64_t ipackets; /**< Total of successfully received packets. */
+	uint64_t ibytes; /**< Total of successfully received bytes. */
+#endif
+	uint64_t idropped; /**< Total of packets dropped when RX ring full. */
+	uint64_t rx_nombuf; /**< Total of RX mbuf allocation failures. */
+};
+
+struct mlx5_txq_stats {
+	unsigned int idx; /**< Mapping index. */
+#ifdef MLX5_PMD_SOFT_COUNTERS
+	uint64_t opackets; /**< Total of successfully sent packets. */
+	uint64_t obytes; /**< Total of successfully sent bytes. */
+#endif
+	uint64_t odropped; /**< Total of packets not sent when TX ring full. */
+};
+
+/* RX element (scattered packets). */
+struct rxq_elt_sp {
+	struct ibv_sge sges[MLX5_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
+	struct rte_mbuf *bufs[MLX5_PMD_SGE_WR_N]; /* SGEs buffers. */
+};
+
+/* RX element. */
+struct rxq_elt {
+	struct ibv_sge sge; /* Scatter/Gather Element. */
+	struct rte_mbuf *buf; /* SGE buffer. */
+};
+
+/* Flow director queue structure. */
+struct fdir_queue {
+	struct ibv_qp *qp; /* Associated RX QP. */
+	struct ibv_exp_rwq_ind_table *ind_table; /* Indirection table. */
+};
+
+struct priv;
+
+/* RX queue descriptor. */
+struct rxq {
+	struct priv *priv; /* Back pointer to private data. */
+	struct rte_mempool *mp; /* Memory Pool for allocations. */
+	struct ibv_cq *cq; /* Completion Queue. */
+	struct ibv_exp_wq *wq; /* Work Queue. */
+	int32_t (*poll)(); /* Verbs poll function. */
+	int32_t (*recv)(); /* Verbs receive function. */
+	unsigned int port_id; /* Port ID for incoming packets. */
+	unsigned int elts_n; /* (*elts)[] length. */
+	unsigned int elts_head; /* Current index in (*elts)[]. */
+	unsigned int sp:1; /* Use scattered RX elements. */
+	unsigned int csum:1; /* Enable checksum offloading. */
+	unsigned int csum_l2tun:1; /* Same for L2 tunnels. */
+	unsigned int vlan_strip:1; /* Enable VLAN stripping. */
+	unsigned int crc_present:1; /* CRC must be subtracted. */
+	union {
+		struct rxq_elt_sp (*sp)[]; /* Scattered RX elements. */
+		struct rxq_elt (*no_sp)[]; /* RX elements. */
+	} elts;
+	uint32_t mb_len; /* Length of a mp-issued mbuf. */
+	unsigned int socket; /* CPU socket ID for allocations. */
+	struct mlx5_rxq_stats stats; /* RX queue counters. */
+	struct ibv_exp_res_domain *rd; /* Resource Domain. */
+	struct fdir_queue fdir_queue; /* Flow director queue. */
+	struct ibv_mr *mr; /* Memory Region (for mp). */
+	struct ibv_exp_wq_family *if_wq; /* WQ burst interface. */
+#ifdef HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS
+	struct ibv_exp_cq_family_v1 *if_cq; /* CQ interface. */
+#else /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
+	struct ibv_exp_cq_family *if_cq; /* CQ interface. */
+#endif /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
+};
+
+/* Hash RX queue types. */
+enum hash_rxq_type {
+	HASH_RXQ_TCPV4,
+	HASH_RXQ_UDPV4,
+	HASH_RXQ_IPV4,
+#ifdef HAVE_FLOW_SPEC_IPV6
+	HASH_RXQ_TCPV6,
+	HASH_RXQ_UDPV6,
+	HASH_RXQ_IPV6,
+#endif /* HAVE_FLOW_SPEC_IPV6 */
+	HASH_RXQ_ETH,
+};
+
+/* Flow structure with Ethernet specification. It is packed to prevent padding
+ * between attr and spec as this layout is expected by libibverbs. */
+struct flow_attr_spec_eth {
+	struct ibv_exp_flow_attr attr;
+	struct ibv_exp_flow_spec_eth spec;
+} __attribute__((packed));
+
+/* Define a struct flow_attr_spec_eth object as an array of at least
+ * "size" bytes. Room after the first index is normally used to store
+ * extra flow specifications. */
+#define FLOW_ATTR_SPEC_ETH(name, size) \
+	struct flow_attr_spec_eth name \
+		[((size) / sizeof(struct flow_attr_spec_eth)) + \
+		 !!((size) % sizeof(struct flow_attr_spec_eth))]
+
+/* Initialization data for hash RX queue. */
+struct hash_rxq_init {
+	uint64_t hash_fields; /* Fields that participate in the hash. */
+	uint64_t dpdk_rss_hf; /* Matching DPDK RSS hash fields. */
+	unsigned int flow_priority; /* Flow priority to use. */
+	union {
+		struct {
+			enum ibv_exp_flow_spec_type type;
+			uint16_t size;
+		} hdr;
+		struct ibv_exp_flow_spec_tcp_udp tcp_udp;
+		struct ibv_exp_flow_spec_ipv4 ipv4;
+#ifdef HAVE_FLOW_SPEC_IPV6
+		struct ibv_exp_flow_spec_ipv6 ipv6;
+#endif /* HAVE_FLOW_SPEC_IPV6 */
+		struct ibv_exp_flow_spec_eth eth;
+	} flow_spec; /* Flow specification template. */
+	const struct hash_rxq_init *underlayer; /* Pointer to underlayer. */
+};
+
+/* Initialization data for indirection table. */
+struct ind_table_init {
+	unsigned int max_size; /* Maximum number of WQs. */
+	/* Hash RX queues using this table. */
+	unsigned int hash_types;
+	unsigned int hash_types_n;
+};
+
+/* Initialization data for special flows. */
+struct special_flow_init {
+	uint8_t dst_mac_val[6];
+	uint8_t dst_mac_mask[6];
+	unsigned int hash_types;
+	unsigned int per_vlan:1;
+};
+
+enum hash_rxq_flow_type {
+	HASH_RXQ_FLOW_TYPE_PROMISC,
+	HASH_RXQ_FLOW_TYPE_ALLMULTI,
+	HASH_RXQ_FLOW_TYPE_BROADCAST,
+	HASH_RXQ_FLOW_TYPE_IPV6MULTI,
+	HASH_RXQ_FLOW_TYPE_MAC,
+};
+
+#ifndef NDEBUG
+static inline const char *
+hash_rxq_flow_type_str(enum hash_rxq_flow_type flow_type)
+{
+	switch (flow_type) {
+	case HASH_RXQ_FLOW_TYPE_PROMISC:
+		return "promiscuous";
+	case HASH_RXQ_FLOW_TYPE_ALLMULTI:
+		return "allmulticast";
+	case HASH_RXQ_FLOW_TYPE_BROADCAST:
+		return "broadcast";
+	case HASH_RXQ_FLOW_TYPE_IPV6MULTI:
+		return "IPv6 multicast";
+	case HASH_RXQ_FLOW_TYPE_MAC:
+		return "MAC";
+	}
+	return NULL;
+}
+#endif /* NDEBUG */
+
+struct hash_rxq {
+	struct priv *priv; /* Back pointer to private data. */
+	struct ibv_qp *qp; /* Hash RX QP. */
+	enum hash_rxq_type type; /* Hash RX queue type. */
+	/* MAC flow steering rules, one per VLAN ID. */
+	struct ibv_exp_flow *mac_flow[MLX5_MAX_MAC_ADDRESSES][MLX5_MAX_VLAN_IDS];
+	struct ibv_exp_flow *special_flow
+		[MLX5_MAX_SPECIAL_FLOWS][MLX5_MAX_VLAN_IDS];
+};
+
+/* TX element. */
+struct txq_elt {
+	struct rte_mbuf *buf;
+};
+
+/* Linear buffer type. It is used when transmitting buffers with too many
+ * segments that do not fit the hardware queue (see max_send_sge).
+ * Extra segments are copied (linearized) in such buffers, replacing the
+ * last SGE during TX.
+ * The size is arbitrary but large enough to hold a jumbo frame with
+ * 8 segments considering mbuf.buf_len is about 2048 bytes. */
+typedef uint8_t linear_t[16384];
+
+/* TX queue descriptor. */
+struct txq {
+	struct priv *priv; /* Back pointer to private data. */
+	int32_t (*poll_cnt)(struct ibv_cq *cq, uint32_t max);
+	int (*send_pending)();
+#ifdef HAVE_VERBS_VLAN_INSERTION
+	int (*send_pending_vlan)();
+#endif
+#if MLX5_PMD_MAX_INLINE > 0
+	int (*send_pending_inline)();
+#ifdef HAVE_VERBS_VLAN_INSERTION
+	int (*send_pending_inline_vlan)();
+#endif
+#endif
+#if MLX5_PMD_SGE_WR_N > 1
+	int (*send_pending_sg_list)();
+#ifdef HAVE_VERBS_VLAN_INSERTION
+	int (*send_pending_sg_list_vlan)();
+#endif
+#endif
+	int (*send_flush)(struct ibv_qp *qp);
+	struct ibv_cq *cq; /* Completion Queue. */
+	struct ibv_qp *qp; /* Queue Pair. */
+	struct txq_elt (*elts)[]; /* TX elements. */
+#if MLX5_PMD_MAX_INLINE > 0
+	uint32_t max_inline; /* Max inline send size <= MLX5_PMD_MAX_INLINE. */
+#endif
+	unsigned int elts_n; /* (*elts)[] length. */
+	unsigned int elts_head; /* Current index in (*elts)[]. */
+	unsigned int elts_tail; /* First element awaiting completion. */
+	unsigned int elts_comp; /* Number of completion requests. */
+	unsigned int elts_comp_cd; /* Countdown for next completion request. */
+	unsigned int elts_comp_cd_init; /* Initial value for countdown. */
+	struct {
+		const struct rte_mempool *mp; /* Cached Memory Pool. */
+		struct ibv_mr *mr; /* Memory Region (for mp). */
+		uint32_t lkey; /* mr->lkey */
+	} mp2mr[MLX5_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
+	struct mlx5_txq_stats stats; /* TX queue counters. */
+	/* Elements used only for init part are here. */
+	linear_t (*elts_linear)[]; /* Linearized buffers. */
+	struct ibv_mr *mr_linear; /* Memory Region for linearized buffers. */
+#ifdef HAVE_VERBS_VLAN_INSERTION
+	struct ibv_exp_qp_burst_family_v1 *if_qp; /* QP burst interface. */
+#else
+	struct ibv_exp_qp_burst_family *if_qp; /* QP burst interface. */
+#endif
+	struct ibv_exp_cq_family *if_cq; /* CQ interface. */
+	struct ibv_exp_res_domain *rd; /* Resource Domain. */
+	unsigned int socket; /* CPU socket ID for allocations. */
+};
+
+/* mlx5_rxq.c */
+
+extern const struct hash_rxq_init hash_rxq_init[];
+extern const unsigned int hash_rxq_init_n;
+
+extern uint8_t rss_hash_default_key[];
+extern const size_t rss_hash_default_key_len;
+
+size_t priv_flow_attr(struct priv *, struct ibv_exp_flow_attr *,
+		      size_t, enum hash_rxq_type);
+int priv_create_hash_rxqs(struct priv *);
+void priv_destroy_hash_rxqs(struct priv *);
+int priv_allow_flow_type(struct priv *, enum hash_rxq_flow_type);
+int priv_rehash_flows(struct priv *);
+void rxq_cleanup(struct rxq *);
+int rxq_rehash(struct rte_eth_dev *, struct rxq *);
+int rxq_setup(struct rte_eth_dev *, struct rxq *, uint16_t, unsigned int,
+	      const struct rte_eth_rxconf *, struct rte_mempool *);
+int mlx5_rx_queue_setup(struct rte_eth_dev *, uint16_t, uint16_t, unsigned int,
+			const struct rte_eth_rxconf *, struct rte_mempool *);
+void mlx5_rx_queue_release(void *);
+uint16_t mlx5_rx_burst_secondary_setup(void *dpdk_rxq, struct rte_mbuf **pkts,
+			      uint16_t pkts_n);
+
+
+/* mlx5_txq.c */
+
+void txq_cleanup(struct txq *);
+int txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
+	  unsigned int socket, const struct rte_eth_txconf *conf);
+
+int mlx5_tx_queue_setup(struct rte_eth_dev *, uint16_t, uint16_t, unsigned int,
+			const struct rte_eth_txconf *);
+void mlx5_tx_queue_release(void *);
+uint16_t mlx5_tx_burst_secondary_setup(void *dpdk_txq, struct rte_mbuf **pkts,
+			      uint16_t pkts_n);
+
+/* mlx5_rxtx.c */
+
+struct ibv_mr *mlx5_mp2mr(struct ibv_pd *, const struct rte_mempool *);
+void txq_mp2mr_iter(const struct rte_mempool *, void *);
+uint16_t mlx5_tx_burst(void *, struct rte_mbuf **, uint16_t);
+uint16_t mlx5_rx_burst_sp(void *, struct rte_mbuf **, uint16_t);
+uint16_t mlx5_rx_burst(void *, struct rte_mbuf **, uint16_t);
+uint16_t removed_tx_burst(void *, struct rte_mbuf **, uint16_t);
+uint16_t removed_rx_burst(void *, struct rte_mbuf **, uint16_t);
+
+#endif /* RTE_PMD_MLX5_RXTX_H_ */