41f8001be6
This reverts commit ff00a0dc56.
Support for several RSS parent queues was necessary to implement the RSS
flow rule action, dropped in a prior commit.
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
280 lines
10 KiB
C
280 lines
10 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 number of Scatter/Gather Elements per Work Request. */
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#define MLX4_PMD_SGE_WR_N 4
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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 (scattered packets). */
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struct rxq_elt_sp {
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struct ibv_recv_wr wr; /* Work Request. */
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struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
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struct rte_mbuf *bufs[MLX4_PMD_SGE_WR_N]; /* SGEs buffers. */
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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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/* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
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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_exp_qp_burst_family *if_qp; /* QP burst interface. */
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struct ibv_exp_cq_family *if_cq; /* CQ interface. */
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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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union {
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struct rxq_elt_sp (*sp)[]; /* Scattered RX elements. */
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struct rxq_elt (*no_sp)[]; /* RX elements. */
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} elts;
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unsigned int sp:1; /* Use scattered RX elements. */
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unsigned int csum:1; /* Enable checksum offloading. */
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unsigned int csum_l2tun:1; /* Same for L2 tunnels. */
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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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struct ibv_exp_res_domain *rd; /* Resource Domain. */
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};
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/* TX element. */
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struct txq_elt {
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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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/*
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* Linear buffer type. It is used when transmitting buffers with too many
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* segments that do not fit the hardware queue (see max_send_sge).
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* Extra segments are copied (linearized) in such buffers, replacing the
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* last SGE during TX.
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* The size is arbitrary but large enough to hold a jumbo frame with
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* 8 segments considering mbuf.buf_len is about 2048 bytes.
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*/
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typedef uint8_t linear_t[16384];
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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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struct ibv_exp_qp_burst_family *if_qp; /* QP burst interface. */
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struct ibv_exp_cq_family *if_cq; /* CQ interface. */
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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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linear_t (*elts_linear)[]; /* Linearized buffers. */
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struct ibv_mr *mr_linear; /* Memory Region for linearized buffers. */
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unsigned int socket; /* CPU socket ID for allocations. */
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struct ibv_exp_res_domain *rd; /* Resource Domain. */
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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 hw_qpg:1; /* QP groups are supported. */
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unsigned int hw_tss:1; /* TSS is supported. */
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unsigned int hw_rss:1; /* RSS is supported. */
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unsigned int hw_csum:1; /* Checksum offload is supported. */
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unsigned int hw_csum_l2tun:1; /* Same for L2 tunnels. */
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unsigned int rss:1; /* RSS is 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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unsigned int inl_recv_size; /* Inline recv size */
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unsigned int max_rss_tbl_sz; /* Maximum number of RSS queues. */
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/* RX/TX queues. */
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struct rxq rxq_parent; /* Parent queue when RSS is enabled. */
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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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rte_spinlock_t lock; /* Lock for control functions. */
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};
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void priv_lock(struct priv *priv);
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void priv_unlock(struct priv *priv);
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#endif /* RTE_PMD_MLX4_H_ */
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