freebsd-dev/sys/dev/ena/ena_netmap.h
Marcin Wojtas 358bcc4c6c Add support for ENA NETMAP partial initialization
In NETMAP mode not all queues need to be allocated to NETMAP. Some of
them could be left to the kernel. Configuration is managed by the flags
nr_mode and nr_pending_mode provided per each NETMAP kring.

ENA driver checks those flags and perform proper rings initialization.

Differential Revision: https://reviews.freebsd.org/D21937
Submitted by: Rafal Kozik <rk@semihalf.com>
              Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by:  Amazon, Inc.
2019-10-31 16:02:42 +00:00

61 lines
2.2 KiB
C

/*-
* BSD LICENSE
*
* Copyright (c) 2015-2019 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.
*
* $FreeBSD$
*
*/
#ifndef _ENA_NETMAP_H_
#define _ENA_NETMAP_H_
/* Undef (un)likely as they are defined in netmap_kern.h */
#ifdef likely
#undef likely
#endif /* likely */
#ifdef unlikely
#undef unlikely
#endif /* unlikely */
#include <net/netmap.h>
#include <sys/selinfo.h>
#include <dev/netmap/netmap_kern.h>
int ena_netmap_attach(struct ena_adapter *);
int ena_netmap_alloc_rx_slot(struct ena_adapter *, struct ena_ring *,
struct ena_rx_buffer *);
void ena_netmap_free_rx_slot(struct ena_adapter *, struct ena_ring *,
struct ena_rx_buffer *);
bool ena_rx_ring_in_netmap(struct ena_adapter *, int);
bool ena_tx_ring_in_netmap(struct ena_adapter *, int);
void ena_netmap_reset_rx_ring(struct ena_adapter *, int);
void ena_netmap_reset_tx_ring(struct ena_adapter *, int);
void ena_netmap_unload(struct ena_adapter *, bus_dmamap_t);
#endif /* _ENA_NETMAP_H_ */