freebsd-dev/sys/arm/conf/SAM9G20EK
Jonathan T. Looney bd79708dbf In the TCP stack, the hhook(9) framework provides hooks for kernel modules
to add actions that run when a TCP frame is sent or received on a TCP
session in the ESTABLISHED state. In the base tree, this functionality is
only used for the h_ertt module, which is used by the cc_cdg, cc_chd, cc_hd,
and cc_vegas congestion control modules.

Presently, we incur overhead to check for hooks each time a TCP frame is
sent or received on an ESTABLISHED TCP session.

This change adds a new compile-time option (TCP_HHOOK) to determine whether
to include the hhook(9) framework for TCP. To retain backwards
compatibility, I added the TCP_HHOOK option to every configuration file that
already defined "options INET". (Therefore, this patch introduces no
functional change. In order to see a functional difference, you need to
compile a custom kernel without the TCP_HHOOK option.) This change will
allow users to easily exclude this functionality from their kernel, should
they wish to do so.

Note that any users who use a custom kernel configuration and use one of the
congestion control modules listed above will need to add the TCP_HHOOK
option to their kernel configuration.

Reviewed by:	rrs, lstewart, hiren (previous version), sjg (makefiles only)
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D8185
2016-10-12 02:16:42 +00:00

171 lines
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# Kernel configuration for Atmel AT91SAM9G20EK Rev B. development card
# Many after-market boards follow its conventions.
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
# http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ../../conf/NOTES and NOTES files.
# If you are in doubt as to the purpose or necessity of a line, check first
# in NOTES.
#
# $FreeBSD$
ident SAM9G20EK
include "std.arm"
include "../at91/std.sam9g20ek"
#options FDT
#options FDT_DTB_STATIC
#makeoptions FDT_DTS_FILE=at91sam9g20ek.dts
options EARLY_PRINTF
options SOCDEV_PA=0xfc000000
options SOCDEV_VA=0xdc000000
#To statically compile in device wiring instead of /boot/device.hints
hints "SAM9G20EK.hints"
makeoptions MODULES_OVERRIDE=""
options SCHED_4BSD # 4BSD scheduler
options INET # InterNETworking
#options INET6 # IPv6 communications protocols
options TCP_HHOOK # hhook(9) framework for TCP
options TMPFS # Efficient memory filesystem
options FFS # Berkeley Fast Filesystem
#options SOFTUPDATES # Enable FFS soft updates support
#options UFS_ACL # Support for access control lists
#options UFS_DIRHASH # Improve performance on big directories
#options MD_ROOT # MD is a potential root device
#options MD_ROOT_SIZE=4096 # 4MB ram disk
options NANDFS # NAND file system
options NFSCL # Network Filesystem Client
options NFSD # Network Filesystem Server
options NFSLOCKD # Network Lock Manager
#options NFS_ROOT # NFS usable as /, requires NFSCL
#options MSDOSFS # MSDOS Filesystem
#options CD9660 # ISO 9660 Filesystem
#options PROCFS # Process filesystem (requires PSEUDOFS)
#options PSEUDOFS # Pseudo-filesystem framework
options GEOM_PART_BSD # BSD partition scheme
options GEOM_PART_MBR # MBR partition scheme
#options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI
#options KTRACE # ktrace(1) support
options SYSVSHM # SYSV-style shared memory
options SYSVMSG # SYSV-style message queues
options SYSVSEM # SYSV-style semaphores
options _KPOSIX_PRIORITY_SCHEDULING # Posix P1003_1B real-time extensions
# NFS root from boopt/dhcp
#options BOOTP
#options BOOTP_NFSROOT
#options BOOTP_COMPAT
#options BOOTP_NFSV3
#options BOOTP_WIRED_TO=ate0
# s3 because s1 is reserved for the DOS parittions sometimes needed to
# boot off SD cards on the G20 and newer chips. s2 is reserved for
# nanobsd's config partition. s3 and s4 are for the ping-pong upgrade
# path.
options ROOTDEVNAME=\"ufs:/dev/mmcsd0s3a\"
# kernel/memory size reduction
options MUTEX_NOINLINE
options NO_FFS_SNAPSHOT
options NO_SWAPPING
options NO_SYSCTL_DESCR
options RWLOCK_NOINLINE
# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
# Note that 'bpf' is required for DHCP.
device bpf # Berkeley packet filter
# Ethernet
device mii # Minimal MII support
#device ate # Atmel AT91 Ethernet driver
#options AT91_ATE_USE_RMII
device macb # Atmel AT91 Ethernet driver
options AT91_MACB_USE_RMII
# I2C
device at91_twi # Atmel AT91 Two-wire Interface
device iic # I2C generic I/O device driver
device iicbus # I2C bus system
device icee
# MMC/SD
device at91_mci # Atmel AT91 Multimedia Card Interface
options AT91_MCI_HAS_4WIRE
options AT91_MCI_SLOT_B
device mmc # MMC/SD bus
device mmcsd # MMC/SD memory card
# DataFlash
# NOTE: SPI DataFlash and mci/mmc/mmcsd have hardware
# confilict on this card. Use one or the other.
# see board_sam9g20ek.c
#device at91_spi # Atmel AT91 Serial Peripheral Interface
#device spibus # SPI bus
#device at45d # at45db642 and maybe others
# Pseudo devices.
device loop # Network loopback
device random # Entropy device
device ether # Ethernet support
device md # Memory "disks"
# SCSI peripherals
device scbus # SCSI bus (required for ATA/SCSI)
device da # Direct Access (disks)
device cd # CD
device pass # Passthrough device (direct ATA/SCSI access)
# Serial (COM) ports
device uart # Multi-uart driver
# USB support
device ohci # OHCI USB interface
device usb # USB Bus (required)
device umass # Disks/Mass storage - Requires scbus and da
device uhid # "Human Interface Devices"
#device ulpt # Printer
#device udbp # USB Double Bulk Pipe devices
# USB Ethernet, requires miibus
#device miibus
#device aue # ADMtek USB Ethernet
#device axe # ASIX Electronics USB Ethernet
#device cdce # Generic USB over Ethernet
#device cue # CATC USB Ethernet
#device kue # Kawasaki LSI USB Ethernet
#device rue # RealTek RTL8150 USB Ethernet
#device udav # Davicom DM9601E USB
# USB Wireless
#device rum # Ralink Technology RT2501USB wireless NICs
#device uath # Atheros AR5523 wireless NICs
#device ural # Ralink Technology RT2500USB wireless NICs
#device zyd # ZyDAS zd1211/zd1211b wireless NICs
# Wireless NIC cards
#device wlan # 802.11 support
#device wlan_wep # 802.11 WEP support
#device wlan_ccmp # 802.11 CCMP support
#device wlan_tkip # 802.11 TKIP support
#device wlan_amrr # AMRR transmit rate control algorithm
# watchdog
device at91_wdt # Atmel AT91 Watchdog Timer
# NAND Flash - Reference design has Samsung 256MB but others possible
device nand # NAND interface on CS3