e4dff4d83d
Concurrent use of various control path functions (e.g. configuring a queue and destroying it simultaneously) may lead to undefined behavior. PMD are not supposed to protect themselves from misbehaving applications, and mlx4 is one of the few with internal locks on most control path operations. This adds unnecessary complexity. Leave this role to wrapper functions in ethdev. Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
235 lines
8.2 KiB
C
235 lines
8.2 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2012 6WIND S.A.
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* Copyright 2012 Mellanox
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of 6WIND S.A. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef RTE_PMD_MLX4_H_
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#define RTE_PMD_MLX4_H_
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#include <stdint.h>
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/*
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* Runtime logging through RTE_LOG() is enabled when not in debugging mode.
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* Intermediate LOG_*() macros add the required end-of-line characters.
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*/
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#ifndef NDEBUG
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#define INFO(...) DEBUG(__VA_ARGS__)
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#define WARN(...) DEBUG(__VA_ARGS__)
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#define ERROR(...) DEBUG(__VA_ARGS__)
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#else
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#define LOG__(level, m, ...) \
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RTE_LOG(level, PMD, MLX4_DRIVER_NAME ": " m "%c", __VA_ARGS__)
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#define LOG_(level, ...) LOG__(level, __VA_ARGS__, '\n')
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#define INFO(...) LOG_(INFO, __VA_ARGS__)
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#define WARN(...) LOG_(WARNING, __VA_ARGS__)
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#define ERROR(...) LOG_(ERR, __VA_ARGS__)
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#endif
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/* Verbs header. */
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/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
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#ifdef PEDANTIC
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#pragma GCC diagnostic ignored "-Wpedantic"
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#endif
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#include <infiniband/verbs.h>
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#ifdef PEDANTIC
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#pragma GCC diagnostic error "-Wpedantic"
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#endif
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/* Request send completion once in every 64 sends, might be less. */
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#define MLX4_PMD_TX_PER_COMP_REQ 64
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/* Maximum size for inline data. */
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#define MLX4_PMD_MAX_INLINE 0
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/*
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* Maximum number of cached Memory Pools (MPs) per TX queue. Each RTE MP
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* from which buffers are to be transmitted will have to be mapped by this
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* driver to their own Memory Region (MR). This is a slow operation.
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*
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* This value is always 1 for RX queues.
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*/
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#ifndef MLX4_PMD_TX_MP_CACHE
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#define MLX4_PMD_TX_MP_CACHE 8
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#endif
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/* Alarm timeout. */
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#define MLX4_ALARM_TIMEOUT_US 100000
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/* Port parameter. */
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#define MLX4_PMD_PORT_KVARG "port"
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enum {
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PCI_VENDOR_ID_MELLANOX = 0x15b3,
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};
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enum {
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PCI_DEVICE_ID_MELLANOX_CONNECTX3 = 0x1003,
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PCI_DEVICE_ID_MELLANOX_CONNECTX3VF = 0x1004,
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PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO = 0x1007,
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};
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#define MLX4_DRIVER_NAME "net_mlx4"
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/* Number of elements in array. */
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#define elemof(a) (sizeof(a) / sizeof((a)[0]))
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/* Debugging */
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#ifndef NDEBUG
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#include <stdio.h>
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#define DEBUG__(m, ...) \
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(fprintf(stderr, "%s:%d: %s(): " m "%c", \
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__FILE__, __LINE__, __func__, __VA_ARGS__), \
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fflush(stderr), \
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(void)0)
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/*
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* Save/restore errno around DEBUG__().
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* XXX somewhat undefined behavior, but works.
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*/
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#define DEBUG_(...) \
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(errno = ((int []){ \
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*(volatile int *)&errno, \
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(DEBUG__(__VA_ARGS__), 0) \
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})[0])
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#define DEBUG(...) DEBUG_(__VA_ARGS__, '\n')
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#ifndef MLX4_PMD_DEBUG_BROKEN_VERBS
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#define claim_zero(...) assert((__VA_ARGS__) == 0)
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#else /* MLX4_PMD_DEBUG_BROKEN_VERBS */
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#define claim_zero(...) \
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(void)(((__VA_ARGS__) == 0) || \
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DEBUG("Assertion `(" # __VA_ARGS__ ") == 0' failed (IGNORED)."))
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#endif /* MLX4_PMD_DEBUG_BROKEN_VERBS */
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#define claim_nonzero(...) assert((__VA_ARGS__) != 0)
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#define claim_positive(...) assert((__VA_ARGS__) >= 0)
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#else /* NDEBUG */
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/* No-ops. */
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#define DEBUG(...) (void)0
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#define claim_zero(...) (__VA_ARGS__)
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#define claim_nonzero(...) (__VA_ARGS__)
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#define claim_positive(...) (__VA_ARGS__)
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#endif /* NDEBUG */
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struct mlx4_rxq_stats {
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unsigned int idx; /**< Mapping index. */
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uint64_t ipackets; /**< Total of successfully received packets. */
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uint64_t ibytes; /**< Total of successfully received bytes. */
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uint64_t idropped; /**< Total of packets dropped when RX ring full. */
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uint64_t rx_nombuf; /**< Total of RX mbuf allocation failures. */
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};
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/* RX element. */
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struct rxq_elt {
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struct ibv_recv_wr wr; /* Work Request. */
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struct ibv_sge sge; /* Scatter/Gather Element. */
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struct rte_mbuf *buf; /**< Buffer. */
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};
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/* RX queue descriptor. */
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struct rxq {
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struct priv *priv; /* Back pointer to private data. */
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struct rte_mempool *mp; /* Memory Pool for allocations. */
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struct ibv_mr *mr; /* Memory Region (for mp). */
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struct ibv_cq *cq; /* Completion Queue. */
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struct ibv_qp *qp; /* Queue Pair. */
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struct ibv_comp_channel *channel;
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unsigned int port_id; /* Port ID for incoming packets. */
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unsigned int elts_n; /* (*elts)[] length. */
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unsigned int elts_head; /* Current index in (*elts)[]. */
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struct rxq_elt (*elts)[]; /* Rx elements. */
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struct mlx4_rxq_stats stats; /* RX queue counters. */
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unsigned int socket; /* CPU socket ID for allocations. */
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};
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/* TX element. */
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struct txq_elt {
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struct ibv_send_wr wr; /* Work request. */
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struct ibv_sge sge; /* Scatter/gather element. */
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struct rte_mbuf *buf;
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};
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struct mlx4_txq_stats {
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unsigned int idx; /**< Mapping index. */
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uint64_t opackets; /**< Total of successfully sent packets. */
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uint64_t obytes; /**< Total of successfully sent bytes. */
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uint64_t odropped; /**< Total of packets not sent when TX ring full. */
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};
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/* TX queue descriptor. */
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struct txq {
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struct priv *priv; /* Back pointer to private data. */
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struct {
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const struct rte_mempool *mp; /* Cached Memory Pool. */
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struct ibv_mr *mr; /* Memory Region (for mp). */
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uint32_t lkey; /* mr->lkey */
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} mp2mr[MLX4_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
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struct ibv_cq *cq; /* Completion Queue. */
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struct ibv_qp *qp; /* Queue Pair. */
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uint32_t max_inline; /* Max inline send size <= MLX4_PMD_MAX_INLINE. */
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unsigned int elts_n; /* (*elts)[] length. */
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struct txq_elt (*elts)[]; /* TX elements. */
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unsigned int elts_head; /* Current index in (*elts)[]. */
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unsigned int elts_tail; /* First element awaiting completion. */
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unsigned int elts_comp; /* Number of completion requests. */
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unsigned int elts_comp_cd; /* Countdown for next completion request. */
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unsigned int elts_comp_cd_init; /* Initial value for countdown. */
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struct mlx4_txq_stats stats; /* TX queue counters. */
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unsigned int socket; /* CPU socket ID for allocations. */
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};
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struct rte_flow;
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struct priv {
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struct rte_eth_dev *dev; /* Ethernet device. */
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struct ibv_context *ctx; /* Verbs context. */
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struct ibv_device_attr device_attr; /* Device properties. */
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struct ibv_pd *pd; /* Protection Domain. */
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struct ether_addr mac; /* MAC address. */
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struct ibv_flow *mac_flow; /* Flow associated with MAC address. */
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/* Device properties. */
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uint16_t mtu; /* Configured MTU. */
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uint8_t port; /* Physical port number. */
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unsigned int started:1; /* Device started, flows enabled. */
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unsigned int vf:1; /* This is a VF device. */
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unsigned int pending_alarm:1; /* An alarm is pending. */
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unsigned int isolated:1; /* Toggle isolated mode. */
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/* RX/TX queues. */
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unsigned int rxqs_n; /* RX queues array size. */
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unsigned int txqs_n; /* TX queues array size. */
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struct rxq *(*rxqs)[]; /* RX queues. */
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struct txq *(*txqs)[]; /* TX queues. */
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struct rte_intr_handle intr_handle_dev; /* Device interrupt handler. */
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struct rte_intr_handle intr_handle; /* Interrupt handler. */
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struct rte_flow_drop *flow_drop_queue; /* Flow drop queue. */
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LIST_HEAD(mlx4_flows, rte_flow) flows;
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struct rte_intr_conf intr_conf; /* Active interrupt configuration. */
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};
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#endif /* RTE_PMD_MLX4_H_ */
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