8cbcec3cf7
Reviewed by: gnn Sponsored by: Solarflare Communications, Inc. MFC after: 2 days Differential Revision: https://reviews.freebsd.org/D4934
245 lines
7.6 KiB
C
245 lines
7.6 KiB
C
/*-
|
|
* Copyright (c) 2010-2015 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 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.
|
|
*
|
|
* The views and conclusions contained in the software and documentation are
|
|
* those of the authors and should not be interpreted as representing official
|
|
* policies, either expressed or implied, of the FreeBSD Project.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SFXGE_TX_H
|
|
#define _SFXGE_TX_H
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/tcp.h>
|
|
|
|
/* If defined, parse TX packets directly in if_transmit
|
|
* for better cache locality and reduced time under TX lock
|
|
*/
|
|
#define SFXGE_TX_PARSE_EARLY 1
|
|
|
|
/* Maximum size of TSO packet */
|
|
#define SFXGE_TSO_MAX_SIZE (65535)
|
|
|
|
/*
|
|
* Maximum number of segments to be created for a TSO packet.
|
|
* Allow for a reasonable minimum MSS of 512.
|
|
*/
|
|
#define SFXGE_TSO_MAX_SEGS howmany(SFXGE_TSO_MAX_SIZE, 512)
|
|
|
|
/* 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 taking into account that the first may be not 2K cluster
|
|
* boundary aligned.
|
|
* Packet header may be split into two segments because of, for example,
|
|
* VLAN header insertion.
|
|
* The chain could be longer than this initially, but can be shortened
|
|
* with m_collapse().
|
|
*/
|
|
#define SFXGE_TX_MAPPING_MAX_SEG \
|
|
(2 + howmany(SFXGE_TSO_MAX_SIZE, MCLBYTES) + 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_DPL_GET_PKT_LIMIT_DEFAULT (64 * 1024)
|
|
#define SFXGE_TX_DPL_GET_NON_TCP_PKT_LIMIT_DEFAULT 1024
|
|
#define SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT 1024
|
|
|
|
/*
|
|
* Deferred packet list.
|
|
*/
|
|
struct sfxge_tx_dpl {
|
|
unsigned int std_get_max; /* Maximum number of packets
|
|
* in get list */
|
|
unsigned int std_get_non_tcp_max; /* Maximum number
|
|
* of non-TCP packets
|
|
* in get list */
|
|
unsigned int std_put_max; /* Maximum number of packets
|
|
* in put list */
|
|
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_get_count; /* Packets in get list. */
|
|
unsigned int std_get_non_tcp_count; /* Non-TCP packets
|
|
* in get list */
|
|
unsigned int std_get_hiwat; /* Packets in get list
|
|
* high watermark */
|
|
unsigned int std_put_hiwat; /* Packets in put list
|
|
* high watermark */
|
|
};
|
|
|
|
|
|
#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(_entries) (EFX_TXQ_LIMIT(_entries) / 4)
|
|
|
|
#define SFXGE_TX_BATCH 64
|
|
|
|
#define SFXGE_TXQ_LOCK_INIT(_txq, _ifname, _txq_index) \
|
|
do { \
|
|
struct sfxge_txq *__txq = (_txq); \
|
|
\
|
|
snprintf((__txq)->lock_name, \
|
|
sizeof((__txq)->lock_name), \
|
|
"%s:txq%u", (_ifname), (_txq_index)); \
|
|
mtx_init(&(__txq)->lock, (__txq)->lock_name, \
|
|
NULL, MTX_DEF); \
|
|
} while (B_FALSE)
|
|
#define SFXGE_TXQ_LOCK_DESTROY(_txq) \
|
|
mtx_destroy(&(_txq)->lock)
|
|
#define SFXGE_TXQ_LOCK(_txq) \
|
|
mtx_lock(&(_txq)->lock)
|
|
#define SFXGE_TXQ_TRYLOCK(_txq) \
|
|
mtx_trylock(&(_txq)->lock)
|
|
#define SFXGE_TXQ_UNLOCK(_txq) \
|
|
mtx_unlock(&(_txq)->lock)
|
|
#define SFXGE_TXQ_LOCK_ASSERT_OWNED(_txq) \
|
|
mtx_assert(&(_txq)->lock, MA_OWNED)
|
|
#define SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(_txq) \
|
|
mtx_assert(&(_txq)->lock, MA_NOTOWNED)
|
|
|
|
|
|
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;
|
|
unsigned int tso_fw_assisted;
|
|
enum sfxge_txq_type type;
|
|
unsigned int txq_index;
|
|
unsigned int evq_index;
|
|
efsys_mem_t mem;
|
|
unsigned int buf_base_id;
|
|
unsigned int entries;
|
|
unsigned int ptr_mask;
|
|
unsigned int max_pkt_desc;
|
|
|
|
struct sfxge_tx_mapping *stmp; /* Packets in flight. */
|
|
bus_dma_tag_t packet_dma_tag;
|
|
efx_desc_t *pend_desc;
|
|
efx_txq_t *common;
|
|
|
|
efsys_mem_t *tsoh_buffer;
|
|
|
|
char lock_name[SFXGE_LOCK_NAME_MAX];
|
|
|
|
/* 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
|
|
*/
|
|
struct mtx lock __aligned(CACHE_LINE_SIZE);
|
|
struct sfxge_tx_dpl dpl; /* Deferred packet list. */
|
|
unsigned int n_pend_desc;
|
|
unsigned int added;
|
|
unsigned int reaped;
|
|
|
|
/* The last VLAN TCI seen on the queue if FW-assisted tagging is
|
|
used */
|
|
uint16_t hw_vlan_tci;
|
|
|
|
/* Statistics */
|
|
unsigned long tso_bursts;
|
|
unsigned long tso_packets;
|
|
unsigned long tso_long_headers;
|
|
unsigned long collapses;
|
|
unsigned long drops;
|
|
unsigned long get_overflow;
|
|
unsigned long get_non_tcp_overflow;
|
|
unsigned long put_overflow;
|
|
unsigned long netdown_drops;
|
|
unsigned long tso_pdrop_too_many;
|
|
unsigned long tso_pdrop_no_rsrc;
|
|
|
|
/* The following fields change more often, and are used mostly
|
|
* on the completion path
|
|
*/
|
|
unsigned int pending __aligned(CACHE_LINE_SIZE);
|
|
unsigned int completed;
|
|
struct sfxge_txq *next;
|
|
};
|
|
|
|
struct sfxge_evq;
|
|
|
|
extern uint64_t sfxge_tx_get_drops(struct sfxge_softc *sc);
|
|
|
|
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, struct sfxge_evq *evq);
|
|
extern void sfxge_tx_qflush_done(struct sfxge_txq *txq);
|
|
extern void sfxge_if_qflush(struct ifnet *ifp);
|
|
extern int sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m);
|
|
|
|
#endif
|