Imported Upstream version 16.04

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

1 files changed, 315 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.h b/drivers/net/ixgbe/ixgbe_rxtx.h
new file mode 100644
index 00000000..3691a19d
--- /dev/null
+++ b/drivers/net/ixgbe/ixgbe_rxtx.h
@@ -0,0 +1,315 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   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 Intel Corporation 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 _IXGBE_RXTX_H_
+#define _IXGBE_RXTX_H_
+
+/*
+ * Rings setup and release.
+ *
+ * TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be
+ * multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary. This will
+ * also optimize cache line size effect. H/W supports up to cache line size 128.
+ */
+#define	IXGBE_ALIGN	128
+
+#define IXGBE_RXD_ALIGN	(IXGBE_ALIGN / sizeof(union ixgbe_adv_rx_desc))
+#define IXGBE_TXD_ALIGN	(IXGBE_ALIGN / sizeof(union ixgbe_adv_tx_desc))
+
+/*
+ * Maximum number of Ring Descriptors.
+ *
+ * Since RDLEN/TDLEN should be multiple of 128 bytes, the number of ring
+ * descriptors should meet the following condition:
+ *      (num_ring_desc * sizeof(rx/tx descriptor)) % 128 == 0
+ */
+#define	IXGBE_MIN_RING_DESC	32
+#define	IXGBE_MAX_RING_DESC	4096
+
+#define RTE_PMD_IXGBE_TX_MAX_BURST 32
+#define RTE_PMD_IXGBE_RX_MAX_BURST 32
+#define RTE_IXGBE_TX_MAX_FREE_BUF_SZ 64
+
+#define RTE_IXGBE_DESCS_PER_LOOP    4
+
+#ifdef RTE_IXGBE_INC_VECTOR
+#define RTE_IXGBE_RXQ_REARM_THRESH      32
+#define RTE_IXGBE_MAX_RX_BURST          RTE_IXGBE_RXQ_REARM_THRESH
+#endif
+
+#define RX_RING_SZ ((IXGBE_MAX_RING_DESC + RTE_IXGBE_DESCS_PER_LOOP - 1) * \
+		    sizeof(union ixgbe_adv_rx_desc))
+
+#ifdef RTE_PMD_PACKET_PREFETCH
+#define rte_packet_prefetch(p)  rte_prefetch1(p)
+#else
+#define rte_packet_prefetch(p)  do {} while(0)
+#endif
+
+#define RTE_IXGBE_REGISTER_POLL_WAIT_10_MS  10
+#define RTE_IXGBE_WAIT_100_US               100
+#define RTE_IXGBE_VMTXSW_REGISTER_COUNT     2
+
+#define IXGBE_PACKET_TYPE_MASK_82599        0X7F
+#define IXGBE_PACKET_TYPE_MASK_X550         0X10FF
+#define IXGBE_PACKET_TYPE_MASK_TUNNEL       0XFF
+#define IXGBE_PACKET_TYPE_TUNNEL_BIT        0X1000
+
+/**
+ * Structure associated with each descriptor of the RX ring of a RX queue.
+ */
+struct ixgbe_rx_entry {
+	struct rte_mbuf *mbuf; /**< mbuf associated with RX descriptor. */
+};
+
+struct ixgbe_scattered_rx_entry {
+	struct rte_mbuf *fbuf; /**< First segment of the fragmented packet. */
+};
+
+/**
+ * Structure associated with each descriptor of the TX ring of a TX queue.
+ */
+struct ixgbe_tx_entry {
+	struct rte_mbuf *mbuf; /**< mbuf associated with TX desc, if any. */
+	uint16_t next_id; /**< Index of next descriptor in ring. */
+	uint16_t last_id; /**< Index of last scattered descriptor. */
+};
+
+/**
+ * Structure associated with each descriptor of the TX ring of a TX queue.
+ */
+struct ixgbe_tx_entry_v {
+	struct rte_mbuf *mbuf; /**< mbuf associated with TX desc, if any. */
+};
+
+/**
+ * Structure associated with each RX queue.
+ */
+struct ixgbe_rx_queue {
+	struct rte_mempool  *mb_pool; /**< mbuf pool to populate RX ring. */
+	volatile union ixgbe_adv_rx_desc *rx_ring; /**< RX ring virtual address. */
+	uint64_t            rx_ring_phys_addr; /**< RX ring DMA address. */
+	volatile uint32_t   *rdt_reg_addr; /**< RDT register address. */
+	volatile uint32_t   *rdh_reg_addr; /**< RDH register address. */
+	struct ixgbe_rx_entry *sw_ring; /**< address of RX software ring. */
+	struct ixgbe_scattered_rx_entry *sw_sc_ring; /**< address of scattered Rx software ring. */
+	struct rte_mbuf *pkt_first_seg; /**< First segment of current packet. */
+	struct rte_mbuf *pkt_last_seg; /**< Last segment of current packet. */
+	uint64_t            mbuf_initializer; /**< value to init mbufs */
+	uint16_t            nb_rx_desc; /**< number of RX descriptors. */
+	uint16_t            rx_tail;  /**< current value of RDT register. */
+	uint16_t            nb_rx_hold; /**< number of held free RX desc. */
+	uint16_t rx_nb_avail; /**< nr of staged pkts ready to ret to app */
+	uint16_t rx_next_avail; /**< idx of next staged pkt to ret to app */
+	uint16_t rx_free_trigger; /**< triggers rx buffer allocation */
+	uint16_t            rx_using_sse;
+	/**< indicates that vector RX is in use */
+#ifdef RTE_IXGBE_INC_VECTOR
+	uint16_t            rxrearm_nb;     /**< number of remaining to be re-armed */
+	uint16_t            rxrearm_start;  /**< the idx we start the re-arming from */
+#endif
+	uint16_t            rx_free_thresh; /**< max free RX desc to hold. */
+	uint16_t            queue_id; /**< RX queue index. */
+	uint16_t            reg_idx;  /**< RX queue register index. */
+	uint16_t            pkt_type_mask;  /**< Packet type mask for different NICs. */
+	uint8_t             port_id;  /**< Device port identifier. */
+	uint8_t             crc_len;  /**< 0 if CRC stripped, 4 otherwise. */
+	uint8_t             drop_en;  /**< If not 0, set SRRCTL.Drop_En. */
+	uint8_t             rx_deferred_start; /**< not in global dev start. */
+	/** need to alloc dummy mbuf, for wraparound when scanning hw ring */
+	struct rte_mbuf fake_mbuf;
+	/** hold packets to return to application */
+	struct rte_mbuf *rx_stage[RTE_PMD_IXGBE_RX_MAX_BURST*2];
+};
+
+/**
+ * IXGBE CTX Constants
+ */
+enum ixgbe_advctx_num {
+	IXGBE_CTX_0    = 0, /**< CTX0 */
+	IXGBE_CTX_1    = 1, /**< CTX1  */
+	IXGBE_CTX_NUM  = 2, /**< CTX NUMBER  */
+};
+
+/** Offload features */
+union ixgbe_tx_offload {
+	uint64_t data[2];
+	struct {
+		uint64_t l2_len:7; /**< L2 (MAC) Header Length. */
+		uint64_t l3_len:9; /**< L3 (IP) Header Length. */
+		uint64_t l4_len:8; /**< L4 (TCP/UDP) Header Length. */
+		uint64_t tso_segsz:16; /**< TCP TSO segment size */
+		uint64_t vlan_tci:16;
+		/**< VLAN Tag Control Identifier (CPU order). */
+
+		/* fields for TX offloading of tunnels */
+		uint64_t outer_l3_len:8; /**< Outer L3 (IP) Hdr Length. */
+		uint64_t outer_l2_len:8; /**< Outer L2 (MAC) Hdr Length. */
+	};
+};
+
+/*
+ * Compare mask for vlan_macip_len.data,
+ * should be in sync with ixgbe_vlan_macip.f layout.
+ * */
+#define TX_VLAN_CMP_MASK        0xFFFF0000  /**< VLAN length - 16-bits. */
+#define TX_MAC_LEN_CMP_MASK     0x0000FE00  /**< MAC length - 7-bits. */
+#define TX_IP_LEN_CMP_MASK      0x000001FF  /**< IP  length - 9-bits. */
+/** MAC+IP  length. */
+#define TX_MACIP_LEN_CMP_MASK   (TX_MAC_LEN_CMP_MASK | TX_IP_LEN_CMP_MASK)
+
+/**
+ * Structure to check if new context need be built
+ */
+
+struct ixgbe_advctx_info {
+	uint64_t flags;           /**< ol_flags for context build. */
+	/**< tx offload: vlan, tso, l2-l3-l4 lengths. */
+	union ixgbe_tx_offload tx_offload;
+	/** compare mask for tx offload. */
+	union ixgbe_tx_offload tx_offload_mask;
+};
+
+/**
+ * Structure associated with each TX queue.
+ */
+struct ixgbe_tx_queue {
+	/** TX ring virtual address. */
+	volatile union ixgbe_adv_tx_desc *tx_ring;
+	uint64_t            tx_ring_phys_addr; /**< TX ring DMA address. */
+	union {
+		struct ixgbe_tx_entry *sw_ring; /**< address of SW ring for scalar PMD. */
+		struct ixgbe_tx_entry_v *sw_ring_v; /**< address of SW ring for vector PMD */
+	};
+	volatile uint32_t   *tdt_reg_addr; /**< Address of TDT register. */
+	uint16_t            nb_tx_desc;    /**< number of TX descriptors. */
+	uint16_t            tx_tail;       /**< current value of TDT reg. */
+	/**< Start freeing TX buffers if there are less free descriptors than
+	     this value. */
+	uint16_t            tx_free_thresh;
+	/** Number of TX descriptors to use before RS bit is set. */
+	uint16_t            tx_rs_thresh;
+	/** Number of TX descriptors used since RS bit was set. */
+	uint16_t            nb_tx_used;
+	/** Index to last TX descriptor to have been cleaned. */
+	uint16_t            last_desc_cleaned;
+	/** Total number of TX descriptors ready to be allocated. */
+	uint16_t            nb_tx_free;
+	uint16_t tx_next_dd; /**< next desc to scan for DD bit */
+	uint16_t tx_next_rs; /**< next desc to set RS bit */
+	uint16_t            queue_id;      /**< TX queue index. */
+	uint16_t            reg_idx;       /**< TX queue register index. */
+	uint8_t             port_id;       /**< Device port identifier. */
+	uint8_t             pthresh;       /**< Prefetch threshold register. */
+	uint8_t             hthresh;       /**< Host threshold register. */
+	uint8_t             wthresh;       /**< Write-back threshold reg. */
+	uint32_t txq_flags; /**< Holds flags for this TXq */
+	uint32_t            ctx_curr;      /**< Hardware context states. */
+	/** Hardware context0 history. */
+	struct ixgbe_advctx_info ctx_cache[IXGBE_CTX_NUM];
+	const struct ixgbe_txq_ops *ops;       /**< txq ops */
+	uint8_t             tx_deferred_start; /**< not in global dev start. */
+};
+
+struct ixgbe_txq_ops {
+	void (*release_mbufs)(struct ixgbe_tx_queue *txq);
+	void (*free_swring)(struct ixgbe_tx_queue *txq);
+	void (*reset)(struct ixgbe_tx_queue *txq);
+};
+
+/*
+ * The "simple" TX queue functions require that the following
+ * flags are set when the TX queue is configured:
+ *  - ETH_TXQ_FLAGS_NOMULTSEGS
+ *  - ETH_TXQ_FLAGS_NOVLANOFFL
+ *  - ETH_TXQ_FLAGS_NOXSUMSCTP
+ *  - ETH_TXQ_FLAGS_NOXSUMUDP
+ *  - ETH_TXQ_FLAGS_NOXSUMTCP
+ * and that the RS bit threshold (tx_rs_thresh) is at least equal to
+ * RTE_PMD_IXGBE_TX_MAX_BURST.
+ */
+#define IXGBE_SIMPLE_FLAGS ((uint32_t)ETH_TXQ_FLAGS_NOMULTSEGS | \
+			    ETH_TXQ_FLAGS_NOOFFLOADS)
+
+/*
+ * Populate descriptors with the following info:
+ * 1.) buffer_addr = phys_addr + headroom
+ * 2.) cmd_type_len = DCMD_DTYP_FLAGS | pkt_len
+ * 3.) olinfo_status = pkt_len << PAYLEN_SHIFT
+ */
+
+/* Defines for Tx descriptor */
+#define DCMD_DTYP_FLAGS (IXGBE_ADVTXD_DTYP_DATA |\
+			 IXGBE_ADVTXD_DCMD_IFCS |\
+			 IXGBE_ADVTXD_DCMD_DEXT |\
+			 IXGBE_ADVTXD_DCMD_EOP)
+
+
+/* Takes an ethdev and a queue and sets up the tx function to be used based on
+ * the queue parameters. Used in tx_queue_setup by primary process and then
+ * in dev_init by secondary process when attaching to an existing ethdev.
+ */
+void ixgbe_set_tx_function(struct rte_eth_dev *dev, struct ixgbe_tx_queue *txq);
+
+/**
+ * Sets the rx_pkt_burst callback in the ixgbe rte_eth_dev instance.
+ *
+ * Sets the callback based on the device parameters:
+ *  - ixgbe_hw.rx_bulk_alloc_allowed
+ *  - rte_eth_dev_data.scattered_rx
+ *  - rte_eth_dev_data.lro
+ *  - conditions checked in ixgbe_rx_vec_condition_check()
+ *
+ *  This means that the parameters above have to be configured prior to calling
+ *  to this function.
+ *
+ * @dev rte_eth_dev handle
+ */
+void ixgbe_set_rx_function(struct rte_eth_dev *dev);
+
+uint16_t ixgbe_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
+		uint16_t nb_pkts);
+uint16_t ixgbe_recv_scattered_pkts_vec(void *rx_queue,
+		struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
+int ixgbe_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev);
+int ixgbe_rxq_vec_setup(struct ixgbe_rx_queue *rxq);
+void ixgbe_rx_queue_release_mbufs_vec(struct ixgbe_rx_queue *rxq);
+
+#ifdef RTE_IXGBE_INC_VECTOR
+
+uint16_t ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+		uint16_t nb_pkts);
+int ixgbe_txq_vec_setup(struct ixgbe_tx_queue *txq);
+
+#endif /* RTE_IXGBE_INC_VECTOR */
+#endif /* _IXGBE_RXTX_H_ */