xref: /freebsd-src/sys/dev/ena/ena_rss.h (revision 8d6806cd08c093fc001db1f94cf122368b8d1549)

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2015-2024 Amazon.com, Inc. or its affiliates.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 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 ENA_RSS_H
#define ENA_RSS_H

#include "opt_rss.h"

#include <sys/types.h>

#ifdef RSS
#include <net/rss_config.h>
#endif

#include "ena.h"

#define ENA_RX_RSS_MSG_RECORD_SZ 8

struct ena_indir {
	uint32_t table[ENA_RX_RSS_TABLE_SIZE];
	/* This is the buffer wired to `rss.indir_table` sysctl. */
	char sysctl_buf[ENA_RX_RSS_TABLE_SIZE * ENA_RX_RSS_MSG_RECORD_SZ];
};

int ena_rss_set_hash(struct ena_com_dev *ena_dev, const u8 *key);
int ena_rss_get_hash_key(struct ena_com_dev *ena_dev, u8 *key);
int ena_rss_configure(struct ena_adapter *);
int ena_rss_indir_get(struct ena_adapter *adapter, uint32_t *table);
int ena_rss_indir_set(struct ena_adapter *adapter, uint32_t *table);
int ena_rss_indir_init(struct ena_adapter *adapter);

static inline void
ena_rss_copy_indir_buf(char *buf, uint32_t *table)
{
	int i;

	for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; ++i) {
		buf += snprintf(buf, ENA_RX_RSS_MSG_RECORD_SZ + 1, "%s%d:%d",
		    i == 0 ? "" : " ", i, table[i]);
	}
}

#endif /* !(ENA_RSS_H) */