d8198c572a
based on Solarflare SFC9000 family controllers. The driver supports jumbo frames, transmit/receive checksum offload, TCP Segmentation Offload (TSO), Large Receive Offload (LRO), VLAN checksum offload, VLAN TSO, and Receive Side Scaling (RSS) using MSI-X interrupts. This work was sponsored by Solarflare Communications, Inc. My sincere thanks to Ben Hutchings for doing a lot of the hard work! Sponsored by: Solarflare Communications, Inc. MFC after: 3 weeks
186 lines
5.5 KiB
C
186 lines
5.5 KiB
C
/*-
|
|
* Copyright (c) 2010-2011 Solarflare Communications, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed in part by Philip Paeps under contract for
|
|
* Solarflare Communications, Inc.
|
|
*
|
|
* 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 AUTHOR 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 AUTHOR 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 _SFXGE_TX_H
|
|
#define _SFXGE_TX_H
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/tcp.h>
|
|
|
|
/* Maximum number of DMA segments needed to map an mbuf chain. With
|
|
* TSO, the mbuf length may be just over 64K, divided into 2K mbuf
|
|
* clusters. (The chain could be longer than this initially, but can
|
|
* be shortened with m_collapse().)
|
|
*/
|
|
#define SFXGE_TX_MAPPING_MAX_SEG (64 / 2 + 1)
|
|
|
|
/* Maximum number of DMA segments needed to map an output packet. It
|
|
* could overlap all mbufs in the chain and also require an extra
|
|
* segment for a TSO header.
|
|
*/
|
|
#define SFXGE_TX_PACKET_MAX_SEG (SFXGE_TX_MAPPING_MAX_SEG + 1)
|
|
|
|
/*
|
|
* Buffer mapping flags.
|
|
*
|
|
* Buffers and DMA mappings must be freed when the last descriptor
|
|
* referring to them is completed. Set the TX_BUF_UNMAP and
|
|
* TX_BUF_MBUF flags on the last descriptor generated for an mbuf
|
|
* chain. Set only the TX_BUF_UNMAP flag on a descriptor referring to
|
|
* a heap buffer.
|
|
*/
|
|
enum sfxge_tx_buf_flags {
|
|
TX_BUF_UNMAP = 1,
|
|
TX_BUF_MBUF = 2,
|
|
};
|
|
|
|
/*
|
|
* Buffer mapping information for descriptors in flight.
|
|
*/
|
|
struct sfxge_tx_mapping {
|
|
union {
|
|
struct mbuf *mbuf;
|
|
caddr_t heap_buf;
|
|
} u;
|
|
bus_dmamap_t map;
|
|
enum sfxge_tx_buf_flags flags;
|
|
};
|
|
|
|
#define SFXGE_TX_MAX_DEFERRED 64
|
|
|
|
/*
|
|
* Deferred packet list.
|
|
*/
|
|
struct sfxge_tx_dpl {
|
|
uintptr_t std_put; /* Head of put list. */
|
|
struct mbuf *std_get; /* Head of get list. */
|
|
struct mbuf **std_getp; /* Tail of get list. */
|
|
unsigned int std_count; /* Count of packets. */
|
|
};
|
|
|
|
|
|
#define SFXGE_TX_BUFFER_SIZE 0x400
|
|
#define SFXGE_TX_HEADER_SIZE 0x100
|
|
#define SFXGE_TX_COPY_THRESHOLD 0x200
|
|
|
|
enum sfxge_txq_state {
|
|
SFXGE_TXQ_UNINITIALIZED = 0,
|
|
SFXGE_TXQ_INITIALIZED,
|
|
SFXGE_TXQ_STARTED
|
|
};
|
|
|
|
enum sfxge_txq_type {
|
|
SFXGE_TXQ_NON_CKSUM = 0,
|
|
SFXGE_TXQ_IP_CKSUM,
|
|
SFXGE_TXQ_IP_TCP_UDP_CKSUM,
|
|
SFXGE_TXQ_NTYPES
|
|
};
|
|
|
|
#define SFXGE_TXQ_UNBLOCK_LEVEL (EFX_TXQ_LIMIT(SFXGE_NDESCS) / 4)
|
|
|
|
#define SFXGE_TX_BATCH 64
|
|
|
|
#ifdef SFXGE_HAVE_MQ
|
|
#define SFXGE_TXQ_LOCK(txq) (&(txq)->lock)
|
|
#define SFXGE_TX_SCALE(sc) ((sc)->intr.n_alloc)
|
|
#else
|
|
#define SFXGE_TXQ_LOCK(txq) (&(txq)->sc->tx_lock)
|
|
#define SFXGE_TX_SCALE(sc) 1
|
|
#endif
|
|
|
|
struct sfxge_txq {
|
|
/* The following fields should be written very rarely */
|
|
struct sfxge_softc *sc;
|
|
enum sfxge_txq_state init_state;
|
|
enum sfxge_flush_state flush_state;
|
|
enum sfxge_txq_type type;
|
|
unsigned int txq_index;
|
|
unsigned int evq_index;
|
|
efsys_mem_t mem;
|
|
unsigned int buf_base_id;
|
|
|
|
struct sfxge_tx_mapping *stmp; /* Packets in flight. */
|
|
bus_dma_tag_t packet_dma_tag;
|
|
efx_buffer_t *pend_desc;
|
|
efx_txq_t *common;
|
|
struct sfxge_txq *next;
|
|
|
|
efsys_mem_t *tsoh_buffer;
|
|
|
|
/* This field changes more often and is read regularly on both
|
|
* the initiation and completion paths
|
|
*/
|
|
int blocked __aligned(CACHE_LINE_SIZE);
|
|
|
|
/* The following fields change more often, and are used mostly
|
|
* on the initiation path
|
|
*/
|
|
#ifdef SFXGE_HAVE_MQ
|
|
struct mtx lock __aligned(CACHE_LINE_SIZE);
|
|
struct sfxge_tx_dpl dpl; /* Deferred packet list. */
|
|
unsigned int n_pend_desc;
|
|
#else
|
|
unsigned int n_pend_desc __aligned(CACHE_LINE_SIZE);
|
|
#endif
|
|
unsigned int added;
|
|
unsigned int reaped;
|
|
/* Statistics */
|
|
unsigned long tso_bursts;
|
|
unsigned long tso_packets;
|
|
unsigned long tso_long_headers;
|
|
unsigned long collapses;
|
|
unsigned long drops;
|
|
|
|
/* The following fields change more often, and are used mostly
|
|
* on the completion path
|
|
*/
|
|
unsigned int pending __aligned(CACHE_LINE_SIZE);
|
|
unsigned int completed;
|
|
};
|
|
|
|
extern int sfxge_tx_packet_add(struct sfxge_txq *, struct mbuf *);
|
|
|
|
extern int sfxge_tx_init(struct sfxge_softc *sc);
|
|
extern void sfxge_tx_fini(struct sfxge_softc *sc);
|
|
extern int sfxge_tx_start(struct sfxge_softc *sc);
|
|
extern void sfxge_tx_stop(struct sfxge_softc *sc);
|
|
extern void sfxge_tx_qcomplete(struct sfxge_txq *txq);
|
|
extern void sfxge_tx_qflush_done(struct sfxge_txq *txq);
|
|
#ifdef SFXGE_HAVE_MQ
|
|
extern void sfxge_if_qflush(struct ifnet *ifp);
|
|
extern int sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m);
|
|
#else
|
|
extern void sfxge_if_start(struct ifnet *ifp);
|
|
#endif
|
|
|
|
#endif
|