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freebsd-dev/sys/dev/sfxge/sfxge.h
Andrew Rybchenko 76c8553679 sfxge: Remove extra cache-line alignment and reorder sfxge_evq_t 
Remove the first member alignment to cacheline since it is nop.
Use __aligned() for the whole structure to make sure that the structure
size is cacheline aligned.
Remove lock alignment to make the structure smaller and fit all members
used on event queue processing into one cacheline (128 bytes) on x86-64.
The lock is obtained as well from different context when event queue
statistics are retrived from sysctl context, but it is infrequent.
Reorder members to avoid padding and go in usage order on event
processing.
As the result all structure members used on event queue processing fit
into exactly one cacheline (128 byte) now.

Sponsored by:   Solarflare Communications, Inc.
Approved by:    gnn (mentor)
2015-01-29 18:57:27 +00:00

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/*-
* 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_H
#define _SFXGE_H
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/condvar.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <vm/uma.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <net/if_types.h>
/*
* Backward-compatibility
*/
#ifndef CACHE_LINE_SIZE
/* This should be right on most machines the driver will be used on, and
* we needn't care too much about wasting a few KB per interface.
*/
#define CACHE_LINE_SIZE 128
#endif
#ifndef IFCAP_LINKSTATE
#define IFCAP_LINKSTATE 0
#endif
#ifndef IFCAP_VLAN_HWTSO
#define IFCAP_VLAN_HWTSO 0
#endif
#ifndef IFM_10G_T
#define IFM_10G_T IFM_UNKNOWN
#endif
#ifndef IFM_10G_KX4
#define IFM_10G_KX4 IFM_10G_CX4
#endif
#if __FreeBSD_version >= 800054
/* Networking core is multiqueue aware. We can manage our own TX
* queues and use m_pkthdr.flowid.
*/
#define SFXGE_HAVE_MQ
#endif
#if (__FreeBSD_version >= 800501 && __FreeBSD_version < 900000) || \
__FreeBSD_version >= 900003
#define SFXGE_HAVE_DESCRIBE_INTR
#endif
#ifdef IFM_ETH_RXPAUSE
#define SFXGE_HAVE_PAUSE_MEDIAOPTS
#endif
#ifndef CTLTYPE_U64
#define CTLTYPE_U64 CTLTYPE_QUAD
#endif
#include "sfxge_rx.h"
#include "sfxge_tx.h"
#define ROUNDUP_POW_OF_TWO(_n) (1ULL << flsl((_n) - 1))
#define SFXGE_IP_ALIGN 2
#define SFXGE_ETHERTYPE_LOOPBACK 0x9000 /* Xerox loopback */
enum sfxge_evq_state {
SFXGE_EVQ_UNINITIALIZED = 0,
SFXGE_EVQ_INITIALIZED,
SFXGE_EVQ_STARTING,
SFXGE_EVQ_STARTED
};
#define SFXGE_EV_BATCH 16384
struct sfxge_evq {
/* Structure members below are sorted by usage order */
struct sfxge_softc *sc;
struct mtx lock;
unsigned int index;
enum sfxge_evq_state init_state;
efsys_mem_t mem;
efx_evq_t *common;
unsigned int read_ptr;
boolean_t exception;
unsigned int rx_done;
unsigned int tx_done;
/* Linked list of TX queues with completions to process */
struct sfxge_txq *txq;
struct sfxge_txq **txqs;
/* Structure members not used on event processing path */
unsigned int buf_base_id;
unsigned int entries;
} __aligned(CACHE_LINE_SIZE);
#define SFXGE_NDESCS 1024
#define SFXGE_MODERATION 30
enum sfxge_intr_state {
SFXGE_INTR_UNINITIALIZED = 0,
SFXGE_INTR_INITIALIZED,
SFXGE_INTR_TESTING,
SFXGE_INTR_STARTED
};
struct sfxge_intr_hdl {
int eih_rid;
void *eih_tag;
struct resource *eih_res;
};
struct sfxge_intr {
enum sfxge_intr_state state;
struct resource *msix_res;
struct sfxge_intr_hdl *table;
int n_alloc;
int type;
efsys_mem_t status;
uint32_t zero_count;
};
enum sfxge_mcdi_state {
SFXGE_MCDI_UNINITIALIZED = 0,
SFXGE_MCDI_INITIALIZED,
SFXGE_MCDI_BUSY,
SFXGE_MCDI_COMPLETED
};
struct sfxge_mcdi {
struct mtx lock;
struct cv cv;
enum sfxge_mcdi_state state;
efx_mcdi_transport_t transport;
};
struct sfxge_hw_stats {
clock_t update_time;
efsys_mem_t dma_buf;
void *decode_buf;
};
enum sfxge_port_state {
SFXGE_PORT_UNINITIALIZED = 0,
SFXGE_PORT_INITIALIZED,
SFXGE_PORT_STARTED
};
struct sfxge_port {
struct sfxge_softc *sc;
struct mtx lock;
enum sfxge_port_state init_state;
#ifndef SFXGE_HAVE_PAUSE_MEDIAOPTS
unsigned int wanted_fc;
#endif
struct sfxge_hw_stats phy_stats;
struct sfxge_hw_stats mac_stats;
efx_link_mode_t link_mode;
};
enum sfxge_softc_state {
SFXGE_UNINITIALIZED = 0,
SFXGE_INITIALIZED,
SFXGE_REGISTERED,
SFXGE_STARTED
};
struct sfxge_softc {
device_t dev;
struct sx softc_lock;
enum sfxge_softc_state init_state;
struct ifnet *ifnet;
unsigned int if_flags;
struct sysctl_oid *stats_node;
struct sysctl_oid *txqs_node;
struct task task_reset;
efx_family_t family;
caddr_t vpd_data;
size_t vpd_size;
efx_nic_t *enp;
struct mtx enp_lock;
unsigned int rxq_entries;
unsigned int txq_entries;
bus_dma_tag_t parent_dma_tag;
efsys_bar_t bar;
struct sfxge_intr intr;
struct sfxge_mcdi mcdi;
struct sfxge_port port;
uint32_t buffer_table_next;
struct sfxge_evq *evq[SFXGE_RX_SCALE_MAX];
unsigned int ev_moderation;
#if EFSYS_OPT_QSTATS
clock_t ev_stats_update_time;
uint64_t ev_stats[EV_NQSTATS];
#endif
uma_zone_t rxq_cache;
struct sfxge_rxq *rxq[SFXGE_RX_SCALE_MAX];
unsigned int rx_indir_table[SFXGE_RX_SCALE_MAX];
#ifdef SFXGE_HAVE_MQ
struct sfxge_txq *txq[SFXGE_TXQ_NTYPES + SFXGE_RX_SCALE_MAX];
#else
struct sfxge_txq *txq[SFXGE_TXQ_NTYPES];
#endif
struct ifmedia media;
size_t rx_prefix_size;
size_t rx_buffer_size;
uma_zone_t rx_buffer_zone;
#ifndef SFXGE_HAVE_MQ
struct mtx tx_lock __aligned(CACHE_LINE_SIZE);
#endif
};
#define SFXGE_LINK_UP(sc) ((sc)->port.link_mode != EFX_LINK_DOWN)
#define SFXGE_RUNNING(sc) ((sc)->ifnet->if_drv_flags & IFF_DRV_RUNNING)
#define SFXGE_PARAM(_name) "hw.sfxge." #_name
SYSCTL_DECL(_hw_sfxge);
/*
* From sfxge.c.
*/
extern void sfxge_schedule_reset(struct sfxge_softc *sc);
extern void sfxge_sram_buf_tbl_alloc(struct sfxge_softc *sc, size_t n,
uint32_t *idp);
/*
* From sfxge_dma.c.
*/
extern int sfxge_dma_init(struct sfxge_softc *sc);
extern void sfxge_dma_fini(struct sfxge_softc *sc);
extern int sfxge_dma_alloc(struct sfxge_softc *sc, bus_size_t len,
efsys_mem_t *esmp);
extern void sfxge_dma_free(efsys_mem_t *esmp);
extern int sfxge_dma_map_sg_collapse(bus_dma_tag_t tag, bus_dmamap_t map,
struct mbuf **mp, bus_dma_segment_t *segs, int *nsegs, int maxsegs);
/*
* From sfxge_ev.c.
*/
extern int sfxge_ev_init(struct sfxge_softc *sc);
extern void sfxge_ev_fini(struct sfxge_softc *sc);
extern int sfxge_ev_start(struct sfxge_softc *sc);
extern void sfxge_ev_stop(struct sfxge_softc *sc);
extern int sfxge_ev_qpoll(struct sfxge_evq *evq);
/*
* From sfxge_intr.c.
*/
extern int sfxge_intr_init(struct sfxge_softc *sc);
extern void sfxge_intr_fini(struct sfxge_softc *sc);
extern int sfxge_intr_start(struct sfxge_softc *sc);
extern void sfxge_intr_stop(struct sfxge_softc *sc);
/*
* From sfxge_mcdi.c.
*/
extern int sfxge_mcdi_init(struct sfxge_softc *sc);
extern void sfxge_mcdi_fini(struct sfxge_softc *sc);
/*
* From sfxge_port.c.
*/
extern int sfxge_port_init(struct sfxge_softc *sc);
extern void sfxge_port_fini(struct sfxge_softc *sc);
extern int sfxge_port_start(struct sfxge_softc *sc);
extern void sfxge_port_stop(struct sfxge_softc *sc);
extern void sfxge_mac_link_update(struct sfxge_softc *sc,
efx_link_mode_t mode);
extern int sfxge_mac_filter_set(struct sfxge_softc *sc);
extern int sfxge_port_ifmedia_init(struct sfxge_softc *sc);
#define SFXGE_MAX_MTU (9 * 1024)
#endif /* _SFXGE_H */
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