--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright 2017 6WIND S.A.
+ * Copyright 2017 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 MLX4_PRM_H_
+#define MLX4_PRM_H_
+
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_byteorder.h>
+
+/* Verbs headers do not support -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
+#include <infiniband/mlx4dv.h>
+#include <infiniband/verbs.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-Wpedantic"
+#endif
+
+/* ConnectX-3 Tx queue basic block. */
+#define MLX4_TXBB_SHIFT 6
+#define MLX4_TXBB_SIZE (1 << MLX4_TXBB_SHIFT)
+
+/* Typical TSO descriptor with 16 gather entries is 352 bytes. */
+#define MLX4_MAX_WQE_SIZE 512
+#define MLX4_MAX_WQE_TXBBS (MLX4_MAX_WQE_SIZE / MLX4_TXBB_SIZE)
+
+/* Send queue stamping/invalidating information. */
+#define MLX4_SQ_STAMP_STRIDE 64
+#define MLX4_SQ_STAMP_DWORDS (MLX4_SQ_STAMP_STRIDE / 4)
+#define MLX4_SQ_STAMP_SHIFT 31
+#define MLX4_SQ_STAMP_VAL 0x7fffffff
+
+/* Work queue element (WQE) flags. */
+#define MLX4_BIT_WQE_OWN 0x80000000
+#define MLX4_WQE_CTRL_IIP_HDR_CSUM (1 << 28)
+#define MLX4_WQE_CTRL_IL4_HDR_CSUM (1 << 27)
+
+#define MLX4_SIZE_TO_TXBBS(size) \
+ (RTE_ALIGN((size), (MLX4_TXBB_SIZE)) >> (MLX4_TXBB_SHIFT))
+
+/* CQE checksum flags. */
+enum {
+ MLX4_CQE_L2_TUNNEL_IPV4 = (int)(1u << 25),
+ MLX4_CQE_L2_TUNNEL_L4_CSUM = (int)(1u << 26),
+ MLX4_CQE_L2_TUNNEL = (int)(1u << 27),
+ MLX4_CQE_L2_VLAN_MASK = (int)(3u << 29),
+ MLX4_CQE_L2_TUNNEL_IPOK = (int)(1u << 31),
+};
+
+/* CQE status flags. */
+#define MLX4_CQE_STATUS_IPV4 (1 << 22)
+#define MLX4_CQE_STATUS_IPV4F (1 << 23)
+#define MLX4_CQE_STATUS_IPV6 (1 << 24)
+#define MLX4_CQE_STATUS_IPV4OPT (1 << 25)
+#define MLX4_CQE_STATUS_TCP (1 << 26)
+#define MLX4_CQE_STATUS_UDP (1 << 27)
+#define MLX4_CQE_STATUS_PTYPE_MASK \
+ (MLX4_CQE_STATUS_IPV4 | \
+ MLX4_CQE_STATUS_IPV4F | \
+ MLX4_CQE_STATUS_IPV6 | \
+ MLX4_CQE_STATUS_IPV4OPT | \
+ MLX4_CQE_STATUS_TCP | \
+ MLX4_CQE_STATUS_UDP)
+
+/* Send queue information. */
+struct mlx4_sq {
+ volatile uint8_t *buf; /**< SQ buffer. */
+ volatile uint8_t *eob; /**< End of SQ buffer */
+ uint32_t head; /**< SQ head counter in units of TXBBS. */
+ uint32_t tail; /**< SQ tail counter in units of TXBBS. */
+ uint32_t txbb_cnt; /**< Num of WQEBB in the Q (should be ^2). */
+ uint32_t txbb_cnt_mask; /**< txbbs_cnt mask (txbb_cnt is ^2). */
+ uint32_t headroom_txbbs; /**< Num of txbbs that should be kept free. */
+ volatile uint32_t *db; /**< Pointer to the doorbell. */
+ uint32_t doorbell_qpn; /**< qp number to write to the doorbell. */
+};
+
+#define mlx4_get_send_wqe(sq, n) ((sq)->buf + ((n) * (MLX4_TXBB_SIZE)))
+
+/* Completion queue events, numbers and masks. */
+#define MLX4_CQ_DB_GEQ_N_MASK 0x3
+#define MLX4_CQ_DOORBELL 0x20
+#define MLX4_CQ_DB_CI_MASK 0xffffff
+
+/* Completion queue information. */
+struct mlx4_cq {
+ volatile void *cq_uar; /**< CQ user access region. */
+ volatile void *cq_db_reg; /**< CQ doorbell register. */
+ volatile uint32_t *set_ci_db; /**< Pointer to the CQ doorbell. */
+ volatile uint32_t *arm_db; /**< Arming Rx events doorbell. */
+ volatile uint8_t *buf; /**< Pointer to the completion queue buffer. */
+ uint32_t cqe_cnt; /**< Number of entries in the queue. */
+ uint32_t cqe_64:1; /**< CQ entry size is 64 bytes. */
+ uint32_t cons_index; /**< Last queue entry that was handled. */
+ uint32_t cqn; /**< CQ number. */
+ int arm_sn; /**< Rx event counter. */
+};
+
+/**
+ * Retrieve a CQE entry from a CQ.
+ *
+ * cqe = cq->buf + cons_index * cqe_size + cqe_offset
+ *
+ * Where cqe_size is 32 or 64 bytes and cqe_offset is 0 or 32 (depending on
+ * cqe_size).
+ *
+ * @param cq
+ * CQ to retrieve entry from.
+ * @param index
+ * Entry index.
+ *
+ * @return
+ * Pointer to CQE entry.
+ */
+static inline volatile struct mlx4_cqe *
+mlx4_get_cqe(struct mlx4_cq *cq, uint32_t index)
+{
+ return (volatile struct mlx4_cqe *)(cq->buf +
+ ((index & (cq->cqe_cnt - 1)) <<
+ (5 + cq->cqe_64)) +
+ (cq->cqe_64 << 5));
+}
+
+/**
+ * Transpose a flag in a value.
+ *
+ * @param val
+ * Input value.
+ * @param from
+ * Flag to retrieve from input value.
+ * @param to
+ * Flag to set in output value.
+ *
+ * @return
+ * Output value with transposed flag enabled if present on input.
+ */
+static inline uint64_t
+mlx4_transpose(uint64_t val, uint64_t from, uint64_t to)
+{
+ return (from >= to ?
+ (val & from) / (from / to) :
+ (val & from) * (to / from));
+}
+
+#endif /* MLX4_PRM_H_ */
Code Review / deb_dpdk.git / blobdiff