dbdc82416b
Split control and datapath to make datapath substitutable and possibly reusable with alternative control path. libefx-based Tx datapath is bound to libefx control path, but it should be possible to use other datapaths with alternative control path(s). Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) 2017 Solarflare Communications Inc.
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* All rights reserved.
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*
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* This software was jointly developed between OKTET Labs (under contract
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* for Solarflare) and Solarflare Communications, Inc.
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SFC_DP_H
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#define _SFC_DP_H
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#include <stdbool.h>
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#include <sys/queue.h>
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#include <rte_pci.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SFC_DIV_ROUND_UP(a, b) \
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__extension__ ({ \
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typeof(a) _a = (a); \
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typeof(b) _b = (b); \
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\
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(_a + (_b - 1)) / _b; \
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})
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/**
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* Datapath exception handler to be provided by the control path.
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*/
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typedef void (sfc_dp_exception_t)(void *ctrl);
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enum sfc_dp_type {
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SFC_DP_RX = 0, /**< Receive datapath */
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SFC_DP_TX, /**< Transmit datapath */
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};
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/** Datapath queue run-time information */
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struct sfc_dp_queue {
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uint16_t port_id;
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uint16_t queue_id;
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struct rte_pci_addr pci_addr;
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};
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void sfc_dp_queue_init(struct sfc_dp_queue *dpq,
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uint16_t port_id, uint16_t queue_id,
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const struct rte_pci_addr *pci_addr);
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/*
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* Helper macro to define datapath logging macros and have uniform
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* logging.
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*/
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#define SFC_DP_LOG(dp_name, level, dpq, ...) \
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do { \
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const struct sfc_dp_queue *_dpq = (dpq); \
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const struct rte_pci_addr *_addr = &(_dpq)->pci_addr; \
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\
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RTE_LOG(level, PMD, \
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RTE_FMT("%s " PCI_PRI_FMT \
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" #%" PRIu16 ".%" PRIu16 ": " \
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RTE_FMT_HEAD(__VA_ARGS__,) "\n", \
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dp_name, \
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_addr->domain, _addr->bus, \
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_addr->devid, _addr->function, \
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_dpq->port_id, _dpq->queue_id, \
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RTE_FMT_TAIL(__VA_ARGS__,))); \
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} while (0)
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/** Datapath definition */
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struct sfc_dp {
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TAILQ_ENTRY(sfc_dp) links;
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const char *name;
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enum sfc_dp_type type;
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/* Mask of required hardware/firmware capabilities */
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unsigned int hw_fw_caps;
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#define SFC_DP_HW_FW_CAP_EF10 0x1
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};
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/** List of datapath variants */
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TAILQ_HEAD(sfc_dp_list, sfc_dp);
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/* Check if available HW/FW capabilities are sufficient for the datapath */
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static inline bool
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sfc_dp_match_hw_fw_caps(const struct sfc_dp *dp, unsigned int avail_caps)
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{
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return (dp->hw_fw_caps & avail_caps) == dp->hw_fw_caps;
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}
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struct sfc_dp *sfc_dp_find_by_name(struct sfc_dp_list *head,
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enum sfc_dp_type type, const char *name);
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struct sfc_dp *sfc_dp_find_by_caps(struct sfc_dp_list *head,
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enum sfc_dp_type type,
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unsigned int avail_caps);
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int sfc_dp_register(struct sfc_dp_list *head, struct sfc_dp *entry);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SFC_DP_H */
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