diff options
Diffstat (limited to 'Documentation/networking')
42 files changed, 2144 insertions, 483 deletions
diff --git a/Documentation/networking/00-INDEX b/Documentation/networking/00-INDEX index 50189bf07d5..fe5c099b8fc 100644 --- a/Documentation/networking/00-INDEX +++ b/Documentation/networking/00-INDEX @@ -32,6 +32,8 @@ cs89x0.txt - the Crystal LAN (CS8900/20-based) Ethernet ISA adapter driver cxacru.txt - Conexant AccessRunner USB ADSL Modem +cxacru-cf.py + - Conexant AccessRunner USB ADSL Modem configuration file parser de4x5.txt - the Digital EtherWORKS DE4?? and DE5?? PCI Ethernet driver decnet.txt diff --git a/Documentation/networking/3c509.txt b/Documentation/networking/3c509.txt index 3c45d5dcd63..dcc9eaf5939 100644 --- a/Documentation/networking/3c509.txt +++ b/Documentation/networking/3c509.txt @@ -31,7 +31,7 @@ models: Large portions of this documentation were heavily borrowed from the guide written the original author of the 3c509 driver, Donald Becker. The master copy of that document, which contains notes on older versions of the driver, -currently resides on Scyld web server: http://www.scyld.com/network/3c509.html. +currently resides on Scyld web server: http://www.scyld.com/. (1) Special Driver Features diff --git a/Documentation/networking/Makefile b/Documentation/networking/Makefile index 6d8af1ac56c..5aba7a33aee 100644 --- a/Documentation/networking/Makefile +++ b/Documentation/networking/Makefile @@ -6,3 +6,5 @@ hostprogs-y := ifenslave # Tell kbuild to always build the programs always := $(hostprogs-y) + +obj-m := timestamping/ diff --git a/Documentation/networking/README.ipw2100 b/Documentation/networking/README.ipw2100 index f3fcaa41f77..6f85e1d0603 100644 --- a/Documentation/networking/README.ipw2100 +++ b/Documentation/networking/README.ipw2100 @@ -72,8 +72,7 @@ such, if you are interested in deploying or shipping a driver as part of solution intended to be used for purposes other than development, please obtain a tested driver from Intel Customer Support at: -http://support.intel.com/support/notebook/sb/CS-006408.htm - +http://www.intel.com/support/wireless/sb/CS-006408.htm 1. Introduction ----------------------------------------------- diff --git a/Documentation/networking/README.ipw2200 b/Documentation/networking/README.ipw2200 index 80c728522c4..616a8e540b0 100644 --- a/Documentation/networking/README.ipw2200 +++ b/Documentation/networking/README.ipw2200 @@ -85,7 +85,7 @@ such, if you are interested in deploying or shipping a driver as part of solution intended to be used for purposes other than development, please obtain a tested driver from Intel Customer Support at: -http://support.intel.com/support/notebook/sb/CS-006408.htm +http://support.intel.com 1. Introduction @@ -171,7 +171,7 @@ Where the supported parameter are: led Can be used to turn on experimental LED code. - 0 = Off, 1 = On. Default is 0. + 0 = Off, 1 = On. Default is 1. mode Can be used to set the default mode of the adapter. diff --git a/Documentation/networking/README.sb1000 b/Documentation/networking/README.sb1000 index f82d42584e9..f92c2aac56a 100644 --- a/Documentation/networking/README.sb1000 +++ b/Documentation/networking/README.sb1000 @@ -27,8 +27,8 @@ cable modem easy. in Franco's original source code distribution .tar.gz file. Support for the sb1000 driver can be found at: - http://home.adelphia.net/~siglercm/sb1000.html - http://linuxpower.cx/~cable/ + http://web.archive.org/web/*/http://home.adelphia.net/~siglercm/sb1000.html + http://web.archive.org/web/*/http://linuxpower.cx/~cable/ along with these utilities. diff --git a/Documentation/networking/arcnet.txt b/Documentation/networking/arcnet.txt index 79601254038..9ff57950215 100644 --- a/Documentation/networking/arcnet.txt +++ b/Documentation/networking/arcnet.txt @@ -68,7 +68,7 @@ REAL NAME" to listserv@tichy.ch.uj.edu.pl. Then, to submit messages to the list, mail to linux-arcnet@tichy.ch.uj.edu.pl. There are archives of the mailing list at: - http://tichy.ch.uj.edu.pl/lists/linux-arcnet + http://epistolary.org/mailman/listinfo.cgi/arcnet The people on linux-net@vger.kernel.org have also been known to be very helpful, especially when we're talking about ALPHA Linux kernels that may or @@ -79,7 +79,7 @@ Other Drivers and Info ---------------------- You can try my ARCNET page on the World Wide Web at: - http://www.worldvisions.ca/~apenwarr/arcnet/ + http://www.qis.net/~jschmitz/arcnet/ Also, SMC (one of the companies that makes ARCnet cards) has a WWW site you might be interested in, which includes several drivers for various cards diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt index 61f516b135b..d2b62b71b61 100644 --- a/Documentation/networking/bonding.txt +++ b/Documentation/networking/bonding.txt @@ -49,6 +49,7 @@ Table of Contents 3.3 Configuring Bonding Manually with Ifenslave 3.3.1 Configuring Multiple Bonds Manually 3.4 Configuring Bonding Manually via Sysfs +3.5 Overriding Configuration for Special Cases 4. Querying Bonding Configuration 4.1 Bonding Configuration @@ -1318,8 +1319,87 @@ echo 2000 > /sys/class/net/bond1/bonding/arp_interval echo +eth2 > /sys/class/net/bond1/bonding/slaves echo +eth3 > /sys/class/net/bond1/bonding/slaves - -4. Querying Bonding Configuration +3.5 Overriding Configuration for Special Cases +---------------------------------------------- +When using the bonding driver, the physical port which transmits a frame is +typically selected by the bonding driver, and is not relevant to the user or +system administrator. The output port is simply selected using the policies of +the selected bonding mode. On occasion however, it is helpful to direct certain +classes of traffic to certain physical interfaces on output to implement +slightly more complex policies. For example, to reach a web server over a +bonded interface in which eth0 connects to a private network, while eth1 +connects via a public network, it may be desirous to bias the bond to send said +traffic over eth0 first, using eth1 only as a fall back, while all other traffic +can safely be sent over either interface. Such configurations may be achieved +using the traffic control utilities inherent in linux. + +By default the bonding driver is multiqueue aware and 16 queues are created +when the driver initializes (see Documentation/networking/multiqueue.txt +for details). If more or less queues are desired the module parameter +tx_queues can be used to change this value. There is no sysfs parameter +available as the allocation is done at module init time. + +The output of the file /proc/net/bonding/bondX has changed so the output Queue +ID is now printed for each slave: + +Bonding Mode: fault-tolerance (active-backup) +Primary Slave: None +Currently Active Slave: eth0 +MII Status: up +MII Polling Interval (ms): 0 +Up Delay (ms): 0 +Down Delay (ms): 0 + +Slave Interface: eth0 +MII Status: up +Link Failure Count: 0 +Permanent HW addr: 00:1a:a0:12:8f:cb +Slave queue ID: 0 + +Slave Interface: eth1 +MII Status: up +Link Failure Count: 0 +Permanent HW addr: 00:1a:a0:12:8f:cc +Slave queue ID: 2 + +The queue_id for a slave can be set using the command: + +# echo "eth1:2" > /sys/class/net/bond0/bonding/queue_id + +Any interface that needs a queue_id set should set it with multiple calls +like the one above until proper priorities are set for all interfaces. On +distributions that allow configuration via initscripts, multiple 'queue_id' +arguments can be added to BONDING_OPTS to set all needed slave queues. + +These queue id's can be used in conjunction with the tc utility to configure +a multiqueue qdisc and filters to bias certain traffic to transmit on certain +slave devices. For instance, say we wanted, in the above configuration to +force all traffic bound to 192.168.1.100 to use eth1 in the bond as its output +device. The following commands would accomplish this: + +# tc qdisc add dev bond0 handle 1 root multiq + +# tc filter add dev bond0 protocol ip parent 1: prio 1 u32 match ip dst \ + 192.168.1.100 action skbedit queue_mapping 2 + +These commands tell the kernel to attach a multiqueue queue discipline to the +bond0 interface and filter traffic enqueued to it, such that packets with a dst +ip of 192.168.1.100 have their output queue mapping value overwritten to 2. +This value is then passed into the driver, causing the normal output path +selection policy to be overridden, selecting instead qid 2, which maps to eth1. + +Note that qid values begin at 1. Qid 0 is reserved to initiate to the driver +that normal output policy selection should take place. One benefit to simply +leaving the qid for a slave to 0 is the multiqueue awareness in the bonding +driver that is now present. This awareness allows tc filters to be placed on +slave devices as well as bond devices and the bonding driver will simply act as +a pass-through for selecting output queues on the slave device rather than +output port selection. + +This feature first appeared in bonding driver version 3.7.0 and support for +output slave selection was limited to round-robin and active-backup modes. + +4 Querying Bonding Configuration ================================= 4.1 Bonding Configuration @@ -2432,7 +2512,7 @@ be found at: https://lists.sourceforge.net/lists/listinfo/bonding-devel Donald Becker's Ethernet Drivers and diag programs may be found at : - - http://www.scyld.com/network/ + - http://web.archive.org/web/*/http://www.scyld.com/network/ You will also find a lot of information regarding Ethernet, NWay, MII, etc. at www.scyld.com. diff --git a/Documentation/networking/caif/Linux-CAIF.txt b/Documentation/networking/caif/Linux-CAIF.txt new file mode 100644 index 00000000000..7fe7a9a33a4 --- /dev/null +++ b/Documentation/networking/caif/Linux-CAIF.txt @@ -0,0 +1,212 @@ +Linux CAIF +=========== +copyright (C) ST-Ericsson AB 2010 +Author: Sjur Brendeland/ sjur.brandeland@stericsson.com +License terms: GNU General Public License (GPL) version 2 + + +Introduction +------------ +CAIF is a MUX protocol used by ST-Ericsson cellular modems for +communication between Modem and host. The host processes can open virtual AT +channels, initiate GPRS Data connections, Video channels and Utility Channels. +The Utility Channels are general purpose pipes between modem and host. + +ST-Ericsson modems support a number of transports between modem +and host. Currently, UART and Loopback are available for Linux. + + +Architecture: +------------ +The implementation of CAIF is divided into: +* CAIF Socket Layer, Kernel API, and Net Device. +* CAIF Core Protocol Implementation +* CAIF Link Layer, implemented as NET devices. + + + RTNL + ! + ! +------+ +------+ +------+ + ! +------+! +------+! +------+! + ! ! Sock !! !Kernel!! ! Net !! + ! ! API !+ ! API !+ ! Dev !+ <- CAIF Client APIs + ! +------+ +------! +------+ + ! ! ! ! + ! +----------!----------+ + ! +------+ <- CAIF Protocol Implementation + +-------> ! CAIF ! + ! Core ! + +------+ + +--------!--------+ + ! ! + +------+ +-----+ + ! ! ! TTY ! <- Link Layer (Net Devices) + +------+ +-----+ + + +Using the Kernel API +---------------------- +The Kernel API is used for accessing CAIF channels from the +kernel. +The user of the API has to implement two callbacks for receive +and control. +The receive callback gives a CAIF packet as a SKB. The control +callback will +notify of channel initialization complete, and flow-on/flow- +off. + + + struct caif_device caif_dev = { + .caif_config = { + .name = "MYDEV" + .type = CAIF_CHTY_AT + } + .receive_cb = my_receive, + .control_cb = my_control, + }; + caif_add_device(&caif_dev); + caif_transmit(&caif_dev, skb); + +See the caif_kernel.h for details about the CAIF kernel API. + + +I M P L E M E N T A T I O N +=========================== +=========================== + +CAIF Core Protocol Layer +========================================= + +CAIF Core layer implements the CAIF protocol as defined by ST-Ericsson. +It implements the CAIF protocol stack in a layered approach, where +each layer described in the specification is implemented as a separate layer. +The architecture is inspired by the design patterns "Protocol Layer" and +"Protocol Packet". + +== CAIF structure == +The Core CAIF implementation contains: + - Simple implementation of CAIF. + - Layered architecture (a la Streams), each layer in the CAIF + specification is implemented in a separate c-file. + - Clients must implement PHY layer to access physical HW + with receive and transmit functions. + - Clients must call configuration function to add PHY layer. + - Clients must implement CAIF layer to consume/produce + CAIF payload with receive and transmit functions. + - Clients must call configuration function to add and connect the + Client layer. + - When receiving / transmitting CAIF Packets (cfpkt), ownership is passed + to the called function (except for framing layers' receive functions + or if a transmit function returns an error, in which case the caller + must free the packet). + +Layered Architecture +-------------------- +The CAIF protocol can be divided into two parts: Support functions and Protocol +Implementation. The support functions include: + + - CFPKT CAIF Packet. Implementation of CAIF Protocol Packet. The + CAIF Packet has functions for creating, destroying and adding content + and for adding/extracting header and trailers to protocol packets. + + - CFLST CAIF list implementation. + + - CFGLUE CAIF Glue. Contains OS Specifics, such as memory + allocation, endianness, etc. + +The CAIF Protocol implementation contains: + + - CFCNFG CAIF Configuration layer. Configures the CAIF Protocol + Stack and provides a Client interface for adding Link-Layer and + Driver interfaces on top of the CAIF Stack. + + - CFCTRL CAIF Control layer. Encodes and Decodes control messages + such as enumeration and channel setup. Also matches request and + response messages. + + - CFSERVL General CAIF Service Layer functionality; handles flow + control and remote shutdown requests. + + - CFVEI CAIF VEI layer. Handles CAIF AT Channels on VEI (Virtual + External Interface). This layer encodes/decodes VEI frames. + + - CFDGML CAIF Datagram layer. Handles CAIF Datagram layer (IP + traffic), encodes/decodes Datagram frames. + + - CFMUX CAIF Mux layer. Handles multiplexing between multiple + physical bearers and multiple channels such as VEI, Datagram, etc. + The MUX keeps track of the existing CAIF Channels and + Physical Instances and selects the apropriate instance based + on Channel-Id and Physical-ID. + + - CFFRML CAIF Framing layer. Handles Framing i.e. Frame length + and frame checksum. + + - CFSERL CAIF Serial layer. Handles concatenation/split of frames + into CAIF Frames with correct length. + + + + +---------+ + | Config | + | CFCNFG | + +---------+ + ! + +---------+ +---------+ +---------+ + | AT | | Control | | Datagram| + | CFVEIL | | CFCTRL | | CFDGML | + +---------+ +---------+ +---------+ + \_____________!______________/ + ! + +---------+ + | MUX | + | | + +---------+ + _____!_____ + / \ + +---------+ +---------+ + | CFFRML | | CFFRML | + | Framing | | Framing | + +---------+ +---------+ + ! ! + +---------+ +---------+ + | | | Serial | + | | | CFSERL | + +---------+ +---------+ + + +In this layered approach the following "rules" apply. + - All layers embed the same structure "struct cflayer" + - A layer does not depend on any other layer's private data. + - Layers are stacked by setting the pointers + layer->up , layer->dn + - In order to send data upwards, each layer should do + layer->up->receive(layer->up, packet); + - In order to send data downwards, each layer should do + layer->dn->transmit(layer->dn, packet); + + +Linux Driver Implementation +=========================== + +Linux GPRS Net Device and CAIF socket are implemented on top of the +CAIF Core protocol. The Net device and CAIF socket have an instance of +'struct cflayer', just like the CAIF Core protocol stack. +Net device and Socket implement the 'receive()' function defined by +'struct cflayer', just like the rest of the CAIF stack. In this way, transmit and +receive of packets is handled as by the rest of the layers: the 'dn->transmit()' +function is called in order to transmit data. + +The layer on top of the CAIF Core implementation is +sometimes referred to as the "Client layer". + + +Configuration of Link Layer +--------------------------- +The Link Layer is implemented as Linux net devices (struct net_device). +Payload handling and registration is done using standard Linux mechanisms. + +The CAIF Protocol relies on a loss-less link layer without implementing +retransmission. This implies that packet drops must not happen. +Therefore a flow-control mechanism is implemented where the physical +interface can initiate flow stop for all CAIF Channels. diff --git a/Documentation/networking/caif/README b/Documentation/networking/caif/README new file mode 100644 index 00000000000..757ccfaa138 --- /dev/null +++ b/Documentation/networking/caif/README @@ -0,0 +1,109 @@ +Copyright (C) ST-Ericsson AB 2010 +Author: Sjur Brendeland/ sjur.brandeland@stericsson.com +License terms: GNU General Public License (GPL) version 2 +--------------------------------------------------------- + +=== Start === +If you have compiled CAIF for modules do: + +$modprobe crc_ccitt +$modprobe caif +$modprobe caif_socket +$modprobe chnl_net + + +=== Preparing the setup with a STE modem === + +If you are working on integration of CAIF you should make sure +that the kernel is built with module support. + +There are some things that need to be tweaked to get the host TTY correctly +set up to talk to the modem. +Since the CAIF stack is running in the kernel and we want to use the existing +TTY, we are installing our physical serial driver as a line discipline above +the TTY device. + +To achieve this we need to install the N_CAIF ldisc from user space. +The benefit is that we can hook up to any TTY. + +The use of Start-of-frame-extension (STX) must also be set as +module parameter "ser_use_stx". + +Normally Frame Checksum is always used on UART, but this is also provided as a +module parameter "ser_use_fcs". + +$ modprobe caif_serial ser_ttyname=/dev/ttyS0 ser_use_stx=yes +$ ifconfig caif_ttyS0 up + +PLEASE NOTE: There is a limitation in Android shell. + It only accepts one argument to insmod/modprobe! + +=== Trouble shooting === + +There are debugfs parameters provided for serial communication. +/sys/kernel/debug/caif_serial/<tty-name>/ + +* ser_state: Prints the bit-mask status where + - 0x02 means SENDING, this is a transient state. + - 0x10 means FLOW_OFF_SENT, i.e. the previous frame has not been sent + and is blocking further send operation. Flow OFF has been propagated + to all CAIF Channels using this TTY. + +* tty_status: Prints the bit-mask tty status information + - 0x01 - tty->warned is on. + - 0x02 - tty->low_latency is on. + - 0x04 - tty->packed is on. + - 0x08 - tty->flow_stopped is on. + - 0x10 - tty->hw_stopped is on. + - 0x20 - tty->stopped is on. + +* last_tx_msg: Binary blob Prints the last transmitted frame. + This can be printed with + $od --format=x1 /sys/kernel/debug/caif_serial/<tty>/last_rx_msg. + The first two tx messages sent look like this. Note: The initial + byte 02 is start of frame extension (STX) used for re-syncing + upon errors. + + - Enumeration: + 0000000 02 05 00 00 03 01 d2 02 + | | | | | | + STX(1) | | | | + Length(2)| | | + Control Channel(1) + Command:Enumeration(1) + Link-ID(1) + Checksum(2) + - Channel Setup: + 0000000 02 07 00 00 00 21 a1 00 48 df + | | | | | | | | + STX(1) | | | | | | + Length(2)| | | | | + Control Channel(1) + Command:Channel Setup(1) + Channel Type(1) + Priority and Link-ID(1) + Endpoint(1) + Checksum(2) + +* last_rx_msg: Prints the last transmitted frame. + The RX messages for LinkSetup look almost identical but they have the + bit 0x20 set in the command bit, and Channel Setup has added one byte + before Checksum containing Channel ID. + NOTE: Several CAIF Messages might be concatenated. The maximum debug + buffer size is 128 bytes. + +== Error Scenarios: +- last_tx_msg contains channel setup message and last_rx_msg is empty -> + The host seems to be able to send over the UART, at least the CAIF ldisc get + notified that sending is completed. + +- last_tx_msg contains enumeration message and last_rx_msg is empty -> + The host is not able to send the message from UART, the tty has not been + able to complete the transmit operation. + +- if /sys/kernel/debug/caif_serial/<tty>/tty_status is non-zero there + might be problems transmitting over UART. + E.g. host and modem wiring is not correct you will typically see + tty_status = 0x10 (hw_stopped) and ser_state = 0x10 (FLOW_OFF_SENT). + You will probably see the enumeration message in last_tx_message + and empty last_rx_message. diff --git a/Documentation/networking/caif/spi_porting.txt b/Documentation/networking/caif/spi_porting.txt new file mode 100644 index 00000000000..61d7c924745 --- /dev/null +++ b/Documentation/networking/caif/spi_porting.txt @@ -0,0 +1,208 @@ +- CAIF SPI porting - + +- CAIF SPI basics: + +Running CAIF over SPI needs some extra setup, owing to the nature of SPI. +Two extra GPIOs have been added in order to negotiate the transfers + between the master and the slave. The minimum requirement for running +CAIF over SPI is a SPI slave chip and two GPIOs (more details below). +Please note that running as a slave implies that you need to keep up +with the master clock. An overrun or underrun event is fatal. + +- CAIF SPI framework: + +To make porting as easy as possible, the CAIF SPI has been divided in +two parts. The first part (called the interface part) deals with all +generic functionality such as length framing, SPI frame negotiation +and SPI frame delivery and transmission. The other part is the CAIF +SPI slave device part, which is the module that you have to write if +you want to run SPI CAIF on a new hardware. This part takes care of +the physical hardware, both with regard to SPI and to GPIOs. + +- Implementing a CAIF SPI device: + + - Functionality provided by the CAIF SPI slave device: + + In order to implement a SPI device you will, as a minimum, + need to implement the following + functions: + + int (*init_xfer) (struct cfspi_xfer * xfer, struct cfspi_dev *dev): + + This function is called by the CAIF SPI interface to give + you a chance to set up your hardware to be ready to receive + a stream of data from the master. The xfer structure contains + both physical and logical adresses, as well as the total length + of the transfer in both directions.The dev parameter can be used + to map to different CAIF SPI slave devices. + + void (*sig_xfer) (bool xfer, struct cfspi_dev *dev): + + This function is called by the CAIF SPI interface when the output + (SPI_INT) GPIO needs to change state. The boolean value of the xfer + variable indicates whether the GPIO should be asserted (HIGH) or + deasserted (LOW). The dev parameter can be used to map to different CAIF + SPI slave devices. + + - Functionality provided by the CAIF SPI interface: + + void (*ss_cb) (bool assert, struct cfspi_ifc *ifc); + + This function is called by the CAIF SPI slave device in order to + signal a change of state of the input GPIO (SS) to the interface. + Only active edges are mandatory to be reported. + This function can be called from IRQ context (recommended in order + not to introduce latency). The ifc parameter should be the pointer + returned from the platform probe function in the SPI device structure. + + void (*xfer_done_cb) (struct cfspi_ifc *ifc); + + This function is called by the CAIF SPI slave device in order to + report that a transfer is completed. This function should only be + called once both the transmission and the reception are completed. + This function can be called from IRQ context (recommended in order + not to introduce latency). The ifc parameter should be the pointer + returned from the platform probe function in the SPI device structure. + + - Connecting the bits and pieces: + + - Filling in the SPI slave device structure: + + Connect the necessary callback functions. + Indicate clock speed (used to calculate toggle delays). + Chose a suitable name (helps debugging if you use several CAIF + SPI slave devices). + Assign your private data (can be used to map to your structure). + + - Filling in the SPI slave platform device structure: + Add name of driver to connect to ("cfspi_sspi"). + Assign the SPI slave device structure as platform data. + +- Padding: + +In order to optimize throughput, a number of SPI padding options are provided. +Padding can be enabled independently for uplink and downlink transfers. +Padding can be enabled for the head, the tail and for the total frame size. +The padding needs to be correctly configured on both sides of the link. +The padding can be changed via module parameters in cfspi_sspi.c or via +the sysfs directory of the cfspi_sspi driver (before device registration). + +- CAIF SPI device template: + +/* + * Copyright (C) ST-Ericsson AB 2010 + * Author: Daniel Martensson / Daniel.Martensson@stericsson.com + * License terms: GNU General Public License (GPL), version 2. + * + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/wait.h> +#include <linux/interrupt.h> +#include <linux/dma-mapping.h> +#include <net/caif/caif_spi.h> + +MODULE_LICENSE("GPL"); + +struct sspi_struct { + struct cfspi_dev sdev; + struct cfspi_xfer *xfer; +}; + +static struct sspi_struct slave; +static struct platform_device slave_device; + +static irqreturn_t sspi_irq(int irq, void *arg) +{ + /* You only need to trigger on an edge to the active state of the + * SS signal. Once a edge is detected, the ss_cb() function should be + * called with the parameter assert set to true. It is OK + * (and even advised) to call the ss_cb() function in IRQ context in + * order not to add any delay. */ + + return IRQ_HANDLED; +} + +static void sspi_complete(void *context) +{ + /* Normally the DMA or the SPI framework will call you back + * in something similar to this. The only thing you need to + * do is to call the xfer_done_cb() function, providing the pointer + * to the CAIF SPI interface. It is OK to call this function + * from IRQ context. */ +} + +static int sspi_init_xfer(struct cfspi_xfer *xfer, struct cfspi_dev *dev) +{ + /* Store transfer info. For a normal implementation you should + * set up your DMA here and make sure that you are ready to + * receive the data from the master SPI. */ + + struct sspi_struct *sspi = (struct sspi_struct *)dev->priv; + + sspi->xfer = xfer; + + return 0; +} + +void sspi_sig_xfer(bool xfer, struct cfspi_dev *dev) +{ + /* If xfer is true then you should assert the SPI_INT to indicate to + * the master that you are ready to recieve the data from the master + * SPI. If xfer is false then you should de-assert SPI_INT to indicate + * that the transfer is done. + */ + + struct sspi_struct *sspi = (struct sspi_struct *)dev->priv; +} + +static void sspi_release(struct device *dev) +{ + /* + * Here you should release your SPI device resources. + */ +} + +static int __init sspi_init(void) +{ + /* Here you should initialize your SPI device by providing the + * necessary functions, clock speed, name and private data. Once + * done, you can register your device with the + * platform_device_register() function. This function will return + * with the CAIF SPI interface initialized. This is probably also + * the place where you should set up your GPIOs, interrupts and SPI + * resources. */ + + int res = 0; + + /* Initialize slave device. */ + slave.sdev.init_xfer = sspi_init_xfer; + slave.sdev.sig_xfer = sspi_sig_xfer; + slave.sdev.clk_mhz = 13; + slave.sdev.priv = &slave; + slave.sdev.name = "spi_sspi"; + slave_device.dev.release = sspi_release; + + /* Initialize platform device. */ + slave_device.name = "cfspi_sspi"; + slave_device.dev.platform_data = &slave.sdev; + + /* Register platform device. */ + res = platform_device_register(&slave_device); + if (res) { + printk(KERN_WARNING "sspi_init: failed to register dev.\n"); + return -ENODEV; + } + + return res; +} + +static void __exit sspi_exit(void) +{ + platform_device_del(&slave_device); +} + +module_init(sspi_init); +module_exit(sspi_exit); diff --git a/Documentation/networking/cxacru-cf.py b/Documentation/networking/cxacru-cf.py new file mode 100644 index 00000000000..b41d298398c --- /dev/null +++ b/Documentation/networking/cxacru-cf.py @@ -0,0 +1,48 @@ +#!/usr/bin/env python +# Copyright 2009 Simon Arlott +# +# This program is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the Free +# Software Foundation; either version 2 of the License, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. +# +# You should have received a copy of the GNU General Public License along with +# this program; if not, write to the Free Software Foundation, Inc., 59 +# Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# +# Usage: cxacru-cf.py < cxacru-cf.bin +# Output: values string suitable for the sysfs adsl_config attribute +# +# Warning: cxacru-cf.bin with MD5 hash cdbac2689969d5ed5d4850f117702110 +# contains mis-aligned values which will stop the modem from being able +# to make a connection. If the first and last two bytes are removed then +# the values become valid, but the modulation will be forced to ANSI +# T1.413 only which may not be appropriate. +# +# The original binary format is a packed list of le32 values. + +import sys +import struct + +i = 0 +while True: + buf = sys.stdin.read(4) + + if len(buf) == 0: + break + elif len(buf) != 4: + sys.stdout.write("\n") + sys.stderr.write("Error: read {0} not 4 bytes\n".format(len(buf))) + sys.exit(1) + + if i > 0: + sys.stdout.write(" ") + sys.stdout.write("{0:x}={1}".format(i, struct.unpack("<I", buf)[0])) + i += 1 + +sys.stdout.write("\n") diff --git a/Documentation/networking/cxacru.txt b/Documentation/networking/cxacru.txt index b074681a963..2cce04457b4 100644 --- a/Documentation/networking/cxacru.txt +++ b/Documentation/networking/cxacru.txt @@ -4,6 +4,12 @@ While it is capable of managing/maintaining the ADSL connection without the module loaded, the device will sometimes stop responding after unloading the driver and it is necessary to unplug/remove power to the device to fix this. +Note: support for cxacru-cf.bin has been removed. It was not loaded correctly +so it had no effect on the device configuration. Fixing it could have stopped +existing devices working when an invalid configuration is supplied. + +There is a script cxacru-cf.py to convert an existing file to the sysfs form. + Detected devices will appear as ATM devices named "cxacru". In /sys/class/atm/ these are directories named cxacruN where N is the device number. A symlink named device points to the USB interface device's directory which contains @@ -15,6 +21,15 @@ several sysfs attribute files for retrieving device statistics: * adsl_headend_environment Information about the remote headend. +* adsl_config + Configuration writing interface. + Write parameters in hexadecimal format <index>=<value>, + separated by whitespace, e.g.: + "1=0 a=5" + Up to 7 parameters at a time will be sent and the modem will restart + the ADSL connection when any value is set. These are logged for future + reference. + * downstream_attenuation (dB) * downstream_bits_per_frame * downstream_rate (kbps) @@ -61,6 +76,7 @@ several sysfs attribute files for retrieving device statistics: * mac_address * modulation + "" (when not connected) "ANSI T1.413" "ITU-T G.992.1 (G.DMT)" "ITU-T G.992.2 (G.LITE)" diff --git a/Documentation/networking/dccp.txt b/Documentation/networking/dccp.txt index b132e4a3cf0..a62fdf7a6bf 100644 --- a/Documentation/networking/dccp.txt +++ b/Documentation/networking/dccp.txt @@ -58,8 +58,10 @@ DCCP_SOCKOPT_GET_CUR_MPS is read-only and retrieves the current maximum packet size (application payload size) in bytes, see RFC 4340, section 14. DCCP_SOCKOPT_AVAILABLE_CCIDS is also read-only and returns the list of CCIDs -supported by the endpoint (see include/linux/dccp.h for symbolic constants). -The caller needs to provide a sufficiently large (> 2) array of type uint8_t. +supported by the endpoint. The option value is an array of type uint8_t whose +size is passed as option length. The minimum array size is 4 elements, the +value returned in the optlen argument always reflects the true number of +built-in CCIDs. DCCP_SOCKOPT_CCID is write-only and sets both the TX and RX CCIDs at the same time, combining the operation of the next two socket options. This option is diff --git a/Documentation/networking/decnet.txt b/Documentation/networking/decnet.txt index d8968958d83..e12a4900cf7 100644 --- a/Documentation/networking/decnet.txt +++ b/Documentation/networking/decnet.txt @@ -4,7 +4,7 @@ 1) Other documentation.... o Project Home Pages - http://www.chygwyn.com/DECnet/ - Kernel info + http://www.chygwyn.com/ - Kernel info http://linux-decnet.sourceforge.net/ - Userland tools http://www.sourceforge.net/projects/linux-decnet/ - Status page diff --git a/Documentation/networking/dns_resolver.txt b/Documentation/networking/dns_resolver.txt new file mode 100644 index 00000000000..aefd1e68180 --- /dev/null +++ b/Documentation/networking/dns_resolver.txt @@ -0,0 +1,146 @@ + =================== + DNS Resolver Module + =================== + +Contents: + + - Overview. + - Compilation. + - Setting up. + - Usage. + - Mechanism. + - Debugging. + + +======== +OVERVIEW +======== + +The DNS resolver module provides a way for kernel services to make DNS queries +by way of requesting a key of key type dns_resolver. These queries are +upcalled to userspace through /sbin/request-key. + +These routines must be supported by userspace tools dns.upcall, cifs.upcall and +request-key. It is under development and does not yet provide the full feature +set. The features it does support include: + + (*) Implements the dns_resolver key_type to contact userspace. + +It does not yet support the following AFS features: + + (*) Dns query support for AFSDB resource record. + +This code is extracted from the CIFS filesystem. + + +=========== +COMPILATION +=========== + +The module should be enabled by turning on the kernel configuration options: + + CONFIG_DNS_RESOLVER - tristate "DNS Resolver support" + + +========== +SETTING UP +========== + +To set up this facility, the /etc/request-key.conf file must be altered so that +/sbin/request-key can appropriately direct the upcalls. For example, to handle +basic dname to IPv4/IPv6 address resolution, the following line should be +added: + + #OP TYPE DESC CO-INFO PROGRAM ARG1 ARG2 ARG3 ... + #====== ============ ======= ======= ========================== + create dns_resolver * * /usr/sbin/cifs.upcall %k + +To direct a query for query type 'foo', a line of the following should be added +before the more general line given above as the first match is the one taken. + + create dns_resolver foo:* * /usr/sbin/dns.foo %k + + + +===== +USAGE +===== + +To make use of this facility, one of the following functions that are +implemented in the module can be called after doing: + + #include <linux/dns_resolver.h> + + (1) int dns_query(const char *type, const char *name, size_t namelen, + const char *options, char **_result, time_t *_expiry); + + This is the basic access function. It looks for a cached DNS query and if + it doesn't find it, it upcalls to userspace to make a new DNS query, which + may then be cached. The key description is constructed as a string of the + form: + + [<type>:]<name> + + where <type> optionally specifies the particular upcall program to invoke, + and thus the type of query to do, and <name> specifies the string to be + looked up. The default query type is a straight hostname to IP address + set lookup. + + The name parameter is not required to be a NUL-terminated string, and its + length should be given by the namelen argument. + + The options parameter may be NULL or it may be a set of options + appropriate to the query type. + + The return value is a string appropriate to the query type. For instance, + for the default query type it is just a list of comma-separated IPv4 and + IPv6 addresses. The caller must free the result. + + The length of the result string is returned on success, and a negative + error code is returned otherwise. -EKEYREJECTED will be returned if the + DNS lookup failed. + + If _expiry is non-NULL, the expiry time (TTL) of the result will be + returned also. + + +========= +MECHANISM +========= + +The dnsresolver module registers a key type called "dns_resolver". Keys of +this type are used to transport and cache DNS lookup results from userspace. + +When dns_query() is invoked, it calls request_key() to search the local +keyrings for a cached DNS result. If that fails to find one, it upcalls to +userspace to get a new result. + +Upcalls to userspace are made through the request_key() upcall vector, and are +directed by means of configuration lines in /etc/request-key.conf that tell +/sbin/request-key what program to run to instantiate the key. + +The upcall handler program is responsible for querying the DNS, processing the +result into a form suitable for passing to the keyctl_instantiate_key() +routine. This then passes the data to dns_resolver_instantiate() which strips +off and processes any options included in the data, and then attaches the +remainder of the string to the key as its payload. + +The upcall handler program should set the expiry time on the key to that of the +lowest TTL of all the records it has extracted a result from. This means that +the key will be discarded and recreated when the data it holds has expired. + +dns_query() returns a copy of the value attached to the key, or an error if +that is indicated instead. + +See <file:Documentation/keys-request-key.txt> for further information about +request-key function. + + +========= +DEBUGGING +========= + +Debugging messages can be turned on dynamically by writing a 1 into the +following file: + + /sys/module/dnsresolver/parameters/debug diff --git a/Documentation/networking/e1000.txt b/Documentation/networking/e1000.txt index 2df71861e57..d9271e74e48 100644 --- a/Documentation/networking/e1000.txt +++ b/Documentation/networking/e1000.txt @@ -1,82 +1,35 @@ Linux* Base Driver for the Intel(R) PRO/1000 Family of Adapters =============================================================== -September 26, 2006 - +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. Contents ======== -- In This Release - Identifying Your Adapter -- Building and Installation - Command Line Parameters - Speed and Duplex Configuration - Additional Configurations -- Known Issues - Support - -In This Release -=============== - -This file describes the Linux* Base Driver for the Intel(R) PRO/1000 Family -of Adapters. This driver includes support for Itanium(R)2-based systems. - -For questions related to hardware requirements, refer to the documentation -supplied with your Intel PRO/1000 adapter. All hardware requirements listed -apply to use with Linux. - -The following features are now available in supported kernels: - - Native VLANs - - Channel Bonding (teaming) - - SNMP - -Channel Bonding documentation can be found in the Linux kernel source: -/Documentation/networking/bonding.txt - -The driver information previously displayed in the /proc filesystem is not -supported in this release. Alternatively, you can use ethtool (version 1.6 -or later), lspci, and ifconfig to obtain the same information. - -Instructions on updating ethtool can be found in the section "Additional -Configurations" later in this document. - -NOTE: The Intel(R) 82562v 10/100 Network Connection only provides 10/100 -support. - - Identifying Your Adapter ======================== For more information on how to identify your adapter, go to the Adapter & Driver ID Guide at: - http://support.intel.com/support/network/adapter/pro100/21397.htm + http://support.intel.com/support/go/network/adapter/idguide.htm For the latest Intel network drivers for Linux, refer to the following website. In the search field, enter your adapter name or type, or use the networking link on the left to search for your adapter: - http://downloadfinder.intel.com/scripts-df/support_intel.asp - + http://support.intel.com/support/go/network/adapter/home.htm Command Line Parameters ======================= -If the driver is built as a module, the following optional parameters -are used by entering them on the command line with the modprobe command -using this syntax: - - modprobe e1000 [<option>=<VAL1>,<VAL2>,...] - -For example, with two PRO/1000 PCI adapters, entering: - - modprobe e1000 TxDescriptors=80,128 - -loads the e1000 driver with 80 TX descriptors for the first adapter and -128 TX descriptors for the second adapter. - The default value for each parameter is generally the recommended setting, unless otherwise noted. @@ -89,10 +42,6 @@ NOTES: For more information about the AutoNeg, Duplex, and Speed parameters, see the application note at: http://www.intel.com/design/network/applnots/ap450.htm - A descriptor describes a data buffer and attributes related to - the data buffer. This information is accessed by the hardware. - - AutoNeg ------- (Supported only on adapters with copper connections) @@ -106,7 +55,6 @@ Duplex parameters must not be specified. NOTE: Refer to the Speed and Duplex section of this readme for more information on the AutoNeg parameter. - Duplex ------ (Supported only on adapters with copper connections) @@ -119,7 +67,6 @@ set to auto-negotiate, the board auto-detects the correct duplex. If the link partner is forced (either full or half), Duplex defaults to half- duplex. - FlowControl ----------- Valid Range: 0-3 (0=none, 1=Rx only, 2=Tx only, 3=Rx&Tx) @@ -128,16 +75,16 @@ Default Value: Reads flow control settings from the EEPROM This parameter controls the automatic generation(Tx) and response(Rx) to Ethernet PAUSE frames. - InterruptThrottleRate --------------------- (not supported on Intel(R) 82542, 82543 or 82544-based adapters) -Valid Range: 0,1,3,100-100000 (0=off, 1=dynamic, 3=dynamic conservative) +Valid Range: 0,1,3,4,100-100000 (0=off, 1=dynamic, 3=dynamic conservative, + 4=simplified balancing) Default Value: 3 The driver can limit the amount of interrupts per second that the adapter -will generate for incoming packets. It does this by writing a value to the -adapter that is based on the maximum amount of interrupts that the adapter +will generate for incoming packets. It does this by writing a value to the +adapter that is based on the maximum amount of interrupts that the adapter will generate per second. Setting InterruptThrottleRate to a value greater or equal to 100 @@ -146,37 +93,43 @@ per second, even if more packets have come in. This reduces interrupt load on the system and can lower CPU utilization under heavy load, but will increase latency as packets are not processed as quickly. -The default behaviour of the driver previously assumed a static -InterruptThrottleRate value of 8000, providing a good fallback value for -all traffic types,but lacking in small packet performance and latency. -The hardware can handle many more small packets per second however, and +The default behaviour of the driver previously assumed a static +InterruptThrottleRate value of 8000, providing a good fallback value for +all traffic types,but lacking in small packet performance and latency. +The hardware can handle many more small packets per second however, and for this reason an adaptive interrupt moderation algorithm was implemented. Since 7.3.x, the driver has two adaptive modes (setting 1 or 3) in which -it dynamically adjusts the InterruptThrottleRate value based on the traffic +it dynamically adjusts the InterruptThrottleRate value based on the traffic that it receives. After determining the type of incoming traffic in the last -timeframe, it will adjust the InterruptThrottleRate to an appropriate value +timeframe, it will adjust the InterruptThrottleRate to an appropriate value for that traffic. The algorithm classifies the incoming traffic every interval into -classes. Once the class is determined, the InterruptThrottleRate value is -adjusted to suit that traffic type the best. There are three classes defined: +classes. Once the class is determined, the InterruptThrottleRate value is +adjusted to suit that traffic type the best. There are three classes defined: "Bulk traffic", for large amounts of packets of normal size; "Low latency", for small amounts of traffic and/or a significant percentage of small -packets; and "Lowest latency", for almost completely small packets or +packets; and "Lowest latency", for almost completely small packets or minimal traffic. -In dynamic conservative mode, the InterruptThrottleRate value is set to 4000 -for traffic that falls in class "Bulk traffic". If traffic falls in the "Low -latency" or "Lowest latency" class, the InterruptThrottleRate is increased +In dynamic conservative mode, the InterruptThrottleRate value is set to 4000 +for traffic that falls in class "Bulk traffic". If traffic falls in the "Low +latency" or "Lowest latency" class, the InterruptThrottleRate is increased stepwise to 20000. This default mode is suitable for most applications. For situations where low latency is vital such as cluster or grid computing, the algorithm can reduce latency even more when InterruptThrottleRate is set to mode 1. In this mode, which operates -the same as mode 3, the InterruptThrottleRate will be increased stepwise to +the same as mode 3, the InterruptThrottleRate will be increased stepwise to 70000 for traffic in class "Lowest latency". +In simplified mode the interrupt rate is based on the ratio of Tx and +Rx traffic. If the bytes per second rate is approximately equal, the +interrupt rate will drop as low as 2000 interrupts per second. If the +traffic is mostly transmit or mostly receive, the interrupt rate could +be as high as 8000. + Setting InterruptThrottleRate to 0 turns off any interrupt moderation and may improve small packet latency, but is generally not suitable for bulk throughput traffic. @@ -212,8 +165,6 @@ NOTE: When e1000 is loaded with default settings and multiple adapters be platform-specific. If CPU utilization is not a concern, use RX_POLLING (NAPI) and default driver settings. - - RxDescriptors ------------- Valid Range: 80-256 for 82542 and 82543-based adapters @@ -225,15 +176,14 @@ by the driver. Increasing this value allows the driver to buffer more incoming packets, at the expense of increased system memory utilization. Each descriptor is 16 bytes. A receive buffer is also allocated for each -descriptor and can be either 2048, 4096, 8192, or 16384 bytes, depending +descriptor and can be either 2048, 4096, 8192, or 16384 bytes, depending on the MTU setting. The maximum MTU size is 16110. -NOTE: MTU designates the frame size. It only needs to be set for Jumbo - Frames. Depending on the available system resources, the request - for a higher number of receive descriptors may be denied. In this +NOTE: MTU designates the frame size. It only needs to be set for Jumbo + Frames. Depending on the available system resources, the request + for a higher number of receive descriptors may be denied. In this case, use a lower number. - RxIntDelay ---------- Valid Range: 0-65535 (0=off) @@ -254,7 +204,6 @@ CAUTION: When setting RxIntDelay to a value other than 0, adapters may restoring the network connection. To eliminate the potential for the hang ensure that RxIntDelay is set to 0. - RxAbsIntDelay ------------- (This parameter is supported only on 82540, 82545 and later adapters.) @@ -268,7 +217,6 @@ packet is received within the set amount of time. Proper tuning, along with RxIntDelay, may improve traffic throughput in specific network conditions. - Speed ----- (This parameter is supported only on adapters with copper connections.) @@ -280,7 +228,6 @@ Speed forces the line speed to the specified value in megabits per second partner is set to auto-negotiate, the board will auto-detect the correct speed. Duplex should also be set when Speed is set to either 10 or 100. - TxDescriptors ------------- Valid Range: 80-256 for 82542 and 82543-based adapters @@ -295,6 +242,36 @@ NOTE: Depending on the available system resources, the request for a higher number of transmit descriptors may be denied. In this case, use a lower number. +TxDescriptorStep +---------------- +Valid Range: 1 (use every Tx Descriptor) + 4 (use every 4th Tx Descriptor) + +Default Value: 1 (use every Tx Descriptor) + +On certain non-Intel architectures, it has been observed that intense TX +traffic bursts of short packets may result in an improper descriptor +writeback. If this occurs, the driver will report a "TX Timeout" and reset +the adapter, after which the transmit flow will restart, though data may +have stalled for as much as 10 seconds before it resumes. + +The improper writeback does not occur on the first descriptor in a system +memory cache-line, which is typically 32 bytes, or 4 descriptors long. + +Setting TxDescriptorStep to a value of 4 will ensure that all TX descriptors +are aligned to the start of a system memory cache line, and so this problem +will not occur. + +NOTES: Setting TxDescriptorStep to 4 effectively reduces the number of + TxDescriptors available for transmits to 1/4 of the normal allocation. + This has a possible negative performance impact, which may be + compensated for by allocating more descriptors using the TxDescriptors + module parameter. + + There are other conditions which may result in "TX Timeout", which will + not be resolved by the use of the TxDescriptorStep parameter. As the + issue addressed by this parameter has never been observed on Intel + Architecture platforms, it should not be used on Intel platforms. TxIntDelay ---------- @@ -307,7 +284,6 @@ efficiency if properly tuned for specific network traffic. If the system is reporting dropped transmits, this value may be set too high causing the driver to run out of available transmit descriptors. - TxAbsIntDelay ------------- (This parameter is supported only on 82540, 82545 and later adapters.) @@ -330,6 +306,35 @@ Default Value: 1 A value of '1' indicates that the driver should enable IP checksum offload for received packets (both UDP and TCP) to the adapter hardware. +Copybreak +--------- +Valid Range: 0-xxxxxxx (0=off) +Default Value: 256 +Usage: insmod e1000.ko copybreak=128 + +Driver copies all packets below or equaling this size to a fresh Rx +buffer before handing it up the stack. + +This parameter is different than other parameters, in that it is a +single (not 1,1,1 etc.) parameter applied to all driver instances and +it is also available during runtime at +/sys/module/e1000/parameters/copybreak + +SmartPowerDownEnable +-------------------- +Valid Range: 0-1 +Default Value: 0 (disabled) + +Allows PHY to turn off in lower power states. The user can turn off +this parameter in supported chipsets. + +KumeranLockLoss +--------------- +Valid Range: 0-1 +Default Value: 1 (enabled) + +This workaround skips resetting the PHY at shutdown for the initial +silicon releases of ICH8 systems. Speed and Duplex Configuration ============================== @@ -385,40 +390,9 @@ If the link partner is forced to a specific speed and duplex, then this parameter should not be used. Instead, use the Speed and Duplex parameters previously mentioned to force the adapter to the same speed and duplex. - Additional Configurations ========================= - Configuring the Driver on Different Distributions - ------------------------------------------------- - Configuring a network driver to load properly when the system is started - is distribution dependent. Typically, the configuration process involves - adding an alias line to /etc/modules.conf or /etc/modprobe.conf as well - as editing other system startup scripts and/or configuration files. Many - popular Linux distributions ship with tools to make these changes for you. - To learn the proper way to configure a network device for your system, - refer to your distribution documentation. If during this process you are - asked for the driver or module name, the name for the Linux Base Driver - for the Intel(R) PRO/1000 Family of Adapters is e1000. - - As an example, if you install the e1000 driver for two PRO/1000 adapters - (eth0 and eth1) and set the speed and duplex to 10full and 100half, add - the following to modules.conf or or modprobe.conf: - - alias eth0 e1000 - alias eth1 e1000 - options e1000 Speed=10,100 Duplex=2,1 - - Viewing Link Messages - --------------------- - Link messages will not be displayed to the console if the distribution is - restricting system messages. In order to see network driver link messages - on your console, set dmesg to eight by entering the following: - - dmesg -n 8 - - NOTE: This setting is not saved across reboots. - Jumbo Frames ------------ Jumbo Frames support is enabled by changing the MTU to a value larger than @@ -437,9 +411,11 @@ Additional Configurations setting in a different location. Notes: - - - To enable Jumbo Frames, increase the MTU size on the interface beyond - 1500. + Degradation in throughput performance may be observed in some Jumbo frames + environments. If this is observed, increasing the application's socket buffer + size and/or increasing the /proc/sys/net/ipv4/tcp_*mem entry values may help. + See the specific application manual and /usr/src/linux*/Documentation/ + networking/ip-sysctl.txt for more details. - The maximum MTU setting for Jumbo Frames is 16110. This value coincides with the maximum Jumbo Frames size of 16128. @@ -447,40 +423,11 @@ Additional Configurations - Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or loss of link. - - Some Intel gigabit adapters that support Jumbo Frames have a frame size - limit of 9238 bytes, with a corresponding MTU size limit of 9216 bytes. - The adapters with this limitation are based on the Intel(R) 82571EB, - 82572EI, 82573L and 80003ES2LAN controller. These correspond to the - following product names: - Intel(R) PRO/1000 PT Server Adapter - Intel(R) PRO/1000 PT Desktop Adapter - Intel(R) PRO/1000 PT Network Connection - Intel(R) PRO/1000 PT Dual Port Server Adapter - Intel(R) PRO/1000 PT Dual Port Network Connection - Intel(R) PRO/1000 PF Server Adapter - Intel(R) PRO/1000 PF Network Connection - Intel(R) PRO/1000 PF Dual Port Server Adapter - Intel(R) PRO/1000 PB Server Connection - Intel(R) PRO/1000 PL Network Connection - Intel(R) PRO/1000 EB Network Connection with I/O Acceleration - Intel(R) PRO/1000 EB Backplane Connection with I/O Acceleration - Intel(R) PRO/1000 PT Quad Port Server Adapter - - Adapters based on the Intel(R) 82542 and 82573V/E controller do not support Jumbo Frames. These correspond to the following product names: Intel(R) PRO/1000 Gigabit Server Adapter Intel(R) PRO/1000 PM Network Connection - - The following adapters do not support Jumbo Frames: - Intel(R) 82562V 10/100 Network Connection - Intel(R) 82566DM Gigabit Network Connection - Intel(R) 82566DC Gigabit Network Connection - Intel(R) 82566MM Gigabit Network Connection - Intel(R) 82566MC Gigabit Network Connection - Intel(R) 82562GT 10/100 Network Connection - Intel(R) 82562G 10/100 Network Connection - - Ethtool ------- The driver utilizes the ethtool interface for driver configuration and @@ -490,142 +437,14 @@ Additional Configurations The latest release of ethtool can be found from http://sourceforge.net/projects/gkernel. - NOTE: Ethtool 1.6 only supports a limited set of ethtool options. Support - for a more complete ethtool feature set can be enabled by upgrading - ethtool to ethtool-1.8.1. - Enabling Wake on LAN* (WoL) --------------------------- - WoL is configured through the Ethtool* utility. Ethtool is included with - all versions of Red Hat after Red Hat 7.2. For other Linux distributions, - download and install Ethtool from the following website: - http://sourceforge.net/projects/gkernel. - - For instructions on enabling WoL with Ethtool, refer to the website listed - above. + WoL is configured through the Ethtool* utility. WoL will be enabled on the system during the next shut down or reboot. For this driver version, in order to enable WoL, the e1000 driver must be loaded when shutting down or rebooting the system. - Wake On LAN is only supported on port A for the following devices: - Intel(R) PRO/1000 PT Dual Port Network Connection - Intel(R) PRO/1000 PT Dual Port Server Connection - Intel(R) PRO/1000 PT Dual Port Server Adapter - Intel(R) PRO/1000 PF Dual Port Server Adapter - Intel(R) PRO/1000 PT Quad Port Server Adapter - - NAPI - ---- - NAPI (Rx polling mode) is enabled in the e1000 driver. - - See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI. - - -Known Issues -============ - -Dropped Receive Packets on Half-duplex 10/100 Networks ------------------------------------------------------- -If you have an Intel PCI Express adapter running at 10mbps or 100mbps, half- -duplex, you may observe occasional dropped receive packets. There are no -workarounds for this problem in this network configuration. The network must -be updated to operate in full-duplex, and/or 1000mbps only. - -Jumbo Frames System Requirement -------------------------------- -Memory allocation failures have been observed on Linux systems with 64 MB -of RAM or less that are running Jumbo Frames. If you are using Jumbo -Frames, your system may require more than the advertised minimum -requirement of 64 MB of system memory. - -Performance Degradation with Jumbo Frames ------------------------------------------ -Degradation in throughput performance may be observed in some Jumbo frames -environments. If this is observed, increasing the application's socket -buffer size and/or increasing the /proc/sys/net/ipv4/tcp_*mem entry values -may help. See the specific application manual and -/usr/src/linux*/Documentation/ -networking/ip-sysctl.txt for more details. - -Jumbo Frames on Foundry BigIron 8000 switch -------------------------------------------- -There is a known issue using Jumbo frames when connected to a Foundry -BigIron 8000 switch. This is a 3rd party limitation. If you experience -loss of packets, lower the MTU size. - -Allocating Rx Buffers when Using Jumbo Frames ---------------------------------------------- -Allocating Rx buffers when using Jumbo Frames on 2.6.x kernels may fail if -the available memory is heavily fragmented. This issue may be seen with PCI-X -adapters or with packet split disabled. This can be reduced or eliminated -by changing the amount of available memory for receive buffer allocation, by -increasing /proc/sys/vm/min_free_kbytes. - -Multiple Interfaces on Same Ethernet Broadcast Network ------------------------------------------------------- -Due to the default ARP behavior on Linux, it is not possible to have -one system on two IP networks in the same Ethernet broadcast domain -(non-partitioned switch) behave as expected. All Ethernet interfaces -will respond to IP traffic for any IP address assigned to the system. -This results in unbalanced receive traffic. - -If you have multiple interfaces in a server, either turn on ARP -filtering by entering: - - echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter -(this only works if your kernel's version is higher than 2.4.5), - -NOTE: This setting is not saved across reboots. The configuration -change can be made permanent by adding the line: - net.ipv4.conf.all.arp_filter = 1 -to the file /etc/sysctl.conf - - or, - -install the interfaces in separate broadcast domains (either in -different switches or in a switch partitioned to VLANs). - -82541/82547 can't link or are slow to link with some link partners ------------------------------------------------------------------ -There is a known compatibility issue with 82541/82547 and some -low-end switches where the link will not be established, or will -be slow to establish. In particular, these switches are known to -be incompatible with 82541/82547: - - Planex FXG-08TE - I-O Data ETG-SH8 - -To workaround this issue, the driver can be compiled with an override -of the PHY's master/slave setting. Forcing master or forcing slave -mode will improve time-to-link. - - # make CFLAGS_EXTRA=-DE1000_MASTER_SLAVE=<n> - -Where <n> is: - - 0 = Hardware default - 1 = Master mode - 2 = Slave mode - 3 = Auto master/slave - -Disable rx flow control with ethtool ------------------------------------- -In order to disable receive flow control using ethtool, you must turn -off auto-negotiation on the same command line. - -For example: - - ethtool -A eth? autoneg off rx off - -Unplugging network cable while ethtool -p is running ----------------------------------------------------- -In kernel versions 2.5.50 and later (including 2.6 kernel), unplugging -the network cable while ethtool -p is running will cause the system to -become unresponsive to keyboard commands, except for control-alt-delete. -Restarting the system appears to be the only remedy. - - Support ======= diff --git a/Documentation/networking/e1000e.txt b/Documentation/networking/e1000e.txt new file mode 100644 index 00000000000..6aa048badf3 --- /dev/null +++ b/Documentation/networking/e1000e.txt @@ -0,0 +1,302 @@ +Linux* Driver for Intel(R) Network Connection +=============================================================== + +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. + +Contents +======== + +- Identifying Your Adapter +- Command Line Parameters +- Additional Configurations +- Support + +Identifying Your Adapter +======================== + +The e1000e driver supports all PCI Express Intel(R) Gigabit Network +Connections, except those that are 82575, 82576 and 82580-based*. + +* NOTE: The Intel(R) PRO/1000 P Dual Port Server Adapter is supported by + the e1000 driver, not the e1000e driver due to the 82546 part being used + behind a PCI Express bridge. + +For more information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: + + http://support.intel.com/support/go/network/adapter/idguide.htm + +For the latest Intel network drivers for Linux, refer to the following +website. In the search field, enter your adapter name or type, or use the +networking link on the left to search for your adapter: + + http://support.intel.com/support/go/network/adapter/home.htm + +Command Line Parameters +======================= + +The default value for each parameter is generally the recommended setting, +unless otherwise noted. + +NOTES: For more information about the InterruptThrottleRate, + RxIntDelay, TxIntDelay, RxAbsIntDelay, and TxAbsIntDelay + parameters, see the application note at: + http://www.intel.com/design/network/applnots/ap450.htm + +InterruptThrottleRate +--------------------- +Valid Range: 0,1,3,4,100-100000 (0=off, 1=dynamic, 3=dynamic conservative, + 4=simplified balancing) +Default Value: 3 + +The driver can limit the amount of interrupts per second that the adapter +will generate for incoming packets. It does this by writing a value to the +adapter that is based on the maximum amount of interrupts that the adapter +will generate per second. + +Setting InterruptThrottleRate to a value greater or equal to 100 +will program the adapter to send out a maximum of that many interrupts +per second, even if more packets have come in. This reduces interrupt +load on the system and can lower CPU utilization under heavy load, +but will increase latency as packets are not processed as quickly. + +The driver has two adaptive modes (setting 1 or 3) in which +it dynamically adjusts the InterruptThrottleRate value based on the traffic +that it receives. After determining the type of incoming traffic in the last +timeframe, it will adjust the InterruptThrottleRate to an appropriate value +for that traffic. + +The algorithm classifies the incoming traffic every interval into +classes. Once the class is determined, the InterruptThrottleRate value is +adjusted to suit that traffic type the best. There are three classes defined: +"Bulk traffic", for large amounts of packets of normal size; "Low latency", +for small amounts of traffic and/or a significant percentage of small +packets; and "Lowest latency", for almost completely small packets or +minimal traffic. + +In dynamic conservative mode, the InterruptThrottleRate value is set to 4000 +for traffic that falls in class "Bulk traffic". If traffic falls in the "Low +latency" or "Lowest latency" class, the InterruptThrottleRate is increased +stepwise to 20000. This default mode is suitable for most applications. + +For situations where low latency is vital such as cluster or +grid computing, the algorithm can reduce latency even more when +InterruptThrottleRate is set to mode 1. In this mode, which operates +the same as mode 3, the InterruptThrottleRate will be increased stepwise to +70000 for traffic in class "Lowest latency". + +In simplified mode the interrupt rate is based on the ratio of Tx and +Rx traffic. If the bytes per second rate is approximately equal the +interrupt rate will drop as low as 2000 interrupts per second. If the +traffic is mostly transmit or mostly receive, the interrupt rate could +be as high as 8000. + +Setting InterruptThrottleRate to 0 turns off any interrupt moderation +and may improve small packet latency, but is generally not suitable +for bulk throughput traffic. + +NOTE: InterruptThrottleRate takes precedence over the TxAbsIntDelay and + RxAbsIntDelay parameters. In other words, minimizing the receive + and/or transmit absolute delays does not force the controller to + generate more interrupts than what the Interrupt Throttle Rate + allows. + +NOTE: When e1000e is loaded with default settings and multiple adapters + are in use simultaneously, the CPU utilization may increase non- + linearly. In order to limit the CPU utilization without impacting + the overall throughput, we recommend that you load the driver as + follows: + + modprobe e1000e InterruptThrottleRate=3000,3000,3000 + + This sets the InterruptThrottleRate to 3000 interrupts/sec for + the first, second, and third instances of the driver. The range + of 2000 to 3000 interrupts per second works on a majority of + systems and is a good starting point, but the optimal value will + be platform-specific. If CPU utilization is not a concern, use + RX_POLLING (NAPI) and default driver settings. + +RxIntDelay +---------- +Valid Range: 0-65535 (0=off) +Default Value: 0 + +This value delays the generation of receive interrupts in units of 1.024 +microseconds. Receive interrupt reduction can improve CPU efficiency if +properly tuned for specific network traffic. Increasing this value adds +extra latency to frame reception and can end up decreasing the throughput +of TCP traffic. If the system is reporting dropped receives, this value +may be set too high, causing the driver to run out of available receive +descriptors. + +CAUTION: When setting RxIntDelay to a value other than 0, adapters may + hang (stop transmitting) under certain network conditions. If + this occurs a NETDEV WATCHDOG message is logged in the system + event log. In addition, the controller is automatically reset, + restoring the network connection. To eliminate the potential + for the hang ensure that RxIntDelay is set to 0. + +RxAbsIntDelay +------------- +Valid Range: 0-65535 (0=off) +Default Value: 8 + +This value, in units of 1.024 microseconds, limits the delay in which a +receive interrupt is generated. Useful only if RxIntDelay is non-zero, +this value ensures that an interrupt is generated after the initial +packet is received within the set amount of time. Proper tuning, +along with RxIntDelay, may improve traffic throughput in specific network +conditions. + +TxIntDelay +---------- +Valid Range: 0-65535 (0=off) +Default Value: 8 + +This value delays the generation of transmit interrupts in units of +1.024 microseconds. Transmit interrupt reduction can improve CPU +efficiency if properly tuned for specific network traffic. If the +system is reporting dropped transmits, this value may be set too high +causing the driver to run out of available transmit descriptors. + +TxAbsIntDelay +------------- +Valid Range: 0-65535 (0=off) +Default Value: 32 + +This value, in units of 1.024 microseconds, limits the delay in which a +transmit interrupt is generated. Useful only if TxIntDelay is non-zero, +this value ensures that an interrupt is generated after the initial +packet is sent on the wire within the set amount of time. Proper tuning, +along with TxIntDelay, may improve traffic throughput in specific +network conditions. + +Copybreak +--------- +Valid Range: 0-xxxxxxx (0=off) +Default Value: 256 + +Driver copies all packets below or equaling this size to a fresh Rx +buffer before handing it up the stack. + +This parameter is different than other parameters, in that it is a +single (not 1,1,1 etc.) parameter applied to all driver instances and +it is also available during runtime at +/sys/module/e1000e/parameters/copybreak + +SmartPowerDownEnable +-------------------- +Valid Range: 0-1 +Default Value: 0 (disabled) + +Allows PHY to turn off in lower power states. The user can set this parameter +in supported chipsets. + +KumeranLockLoss +--------------- +Valid Range: 0-1 +Default Value: 1 (enabled) + +This workaround skips resetting the PHY at shutdown for the initial +silicon releases of ICH8 systems. + +IntMode +------- +Valid Range: 0-2 (0=legacy, 1=MSI, 2=MSI-X) +Default Value: 2 + +Allows changing the interrupt mode at module load time, without requiring a +recompile. If the driver load fails to enable a specific interrupt mode, the +driver will try other interrupt modes, from least to most compatible. The +interrupt order is MSI-X, MSI, Legacy. If specifying MSI (IntMode=1) +interrupts, only MSI and Legacy will be attempted. + +CrcStripping +------------ +Valid Range: 0-1 +Default Value: 1 (enabled) + +Strip the CRC from received packets before sending up the network stack. If +you have a machine with a BMC enabled but cannot receive IPMI traffic after +loading or enabling the driver, try disabling this feature. + +WriteProtectNVM +--------------- +Valid Range: 0-1 +Default Value: 1 (enabled) + +Set the hardware to ignore all write/erase cycles to the GbE region in the +ICHx NVM (non-volatile memory). This feature can be disabled by the +WriteProtectNVM module parameter (enabled by default) only after a hardware +reset, but the machine must be power cycled before trying to enable writes. + +Note: the kernel boot option iomem=relaxed may need to be set if the kernel +config option CONFIG_STRICT_DEVMEM=y, if the root user wants to write the +NVM from user space via ethtool. + +Additional Configurations +========================= + + Jumbo Frames + ------------ + Jumbo Frames support is enabled by changing the MTU to a value larger than + the default of 1500. Use the ifconfig command to increase the MTU size. + For example: + + ifconfig eth<x> mtu 9000 up + + This setting is not saved across reboots. + + Notes: + + - The maximum MTU setting for Jumbo Frames is 9216. This value coincides + with the maximum Jumbo Frames size of 9234 bytes. + + - Using Jumbo Frames at 10 or 100 Mbps is not supported and may result in + poor performance or loss of link. + + - Some adapters limit Jumbo Frames sized packets to a maximum of + 4096 bytes and some adapters do not support Jumbo Frames. + + + Ethtool + ------- + The driver utilizes the ethtool interface for driver configuration and + diagnostics, as well as displaying statistical information. We + strongly recommend downloading the latest version of Ethtool at: + + http://sourceforge.net/projects/gkernel. + + Speed and Duplex + ---------------- + Speed and Duplex are configured through the Ethtool* utility. For + instructions, refer to the Ethtool man page. + + Enabling Wake on LAN* (WoL) + --------------------------- + WoL is configured through the Ethtool* utility. For instructions on + enabling WoL with Ethtool, refer to the Ethtool man page. + + WoL will be enabled on the system during the next shut down or reboot. + For this driver version, in order to enable WoL, the e1000e driver must be + loaded when shutting down or rebooting the system. + + In most cases Wake On LAN is only supported on port A for multiple port + adapters. To verify if a port supports Wake on LAN run ethtool eth<X>. + + +Support +======= + +For general information, go to the Intel support website at: + + www.intel.com/support/ + +or the Intel Wired Networking project hosted by Sourceforge at: + + http://sourceforge.net/projects/e1000 + +If an issue is identified with the released source code on the supported +kernel with a supported adapter, email the specific information related +to the issue to e1000-devel@lists.sf.net diff --git a/Documentation/networking/fore200e.txt b/Documentation/networking/fore200e.txt index b1f337f0f4c..6e0d2a9613e 100644 --- a/Documentation/networking/fore200e.txt +++ b/Documentation/networking/fore200e.txt @@ -39,7 +39,7 @@ version. Alternative binary firmware images can be found somewhere on the ForeThought CD-ROM supplied with your adapter by FORE Systems. You can also get the latest firmware images from FORE Systems at -http://www.fore.com. Register TACTics Online and go to +http://en.wikipedia.org/wiki/FORE_Systems. Register TACTics Online and go to the 'software updates' pages. The firmware binaries are part of the various ForeThought software distributions. diff --git a/Documentation/networking/ifenslave.c b/Documentation/networking/ifenslave.c index 1b96ccda383..2bac9618c34 100644 --- a/Documentation/networking/ifenslave.c +++ b/Documentation/networking/ifenslave.c @@ -756,7 +756,7 @@ static int enslave(char *master_ifname, char *slave_ifname) */ if (abi_ver < 1) { /* For old ABI, the master needs to be - * down before setting it's hwaddr + * down before setting its hwaddr */ res = set_if_down(master_ifname, master_flags.ifr_flags); if (res) { diff --git a/Documentation/networking/igb.txt b/Documentation/networking/igb.txt new file mode 100644 index 00000000000..ab2d7183189 --- /dev/null +++ b/Documentation/networking/igb.txt @@ -0,0 +1,132 @@ +Linux* Base Driver for Intel(R) Network Connection +================================================== + +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. + +Contents +======== + +- Identifying Your Adapter +- Additional Configurations +- Support + +Identifying Your Adapter +======================== + +This driver supports all 82575, 82576 and 82580-based Intel (R) gigabit network +connections. + +For specific information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: + + http://support.intel.com/support/go/network/adapter/idguide.htm + +Command Line Parameters +======================= + +The default value for each parameter is generally the recommended setting, +unless otherwise noted. + +max_vfs +------- +Valid Range: 0-7 +Default Value: 0 + +This parameter adds support for SR-IOV. It causes the driver to spawn up to +max_vfs worth of virtual function. + +Additional Configurations +========================= + + Jumbo Frames + ------------ + Jumbo Frames support is enabled by changing the MTU to a value larger than + the default of 1500. Use the ifconfig command to increase the MTU size. + For example: + + ifconfig eth<x> mtu 9000 up + + This setting is not saved across reboots. + + Notes: + + - The maximum MTU setting for Jumbo Frames is 9216. This value coincides + with the maximum Jumbo Frames size of 9234 bytes. + + - Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or + loss of link. + + Ethtool + ------- + The driver utilizes the ethtool interface for driver configuration and + diagnostics, as well as displaying statistical information. + + http://sourceforge.net/projects/gkernel. + + Enabling Wake on LAN* (WoL) + --------------------------- + WoL is configured through the Ethtool* utility. + + For instructions on enabling WoL with Ethtool, refer to the Ethtool man page. + + WoL will be enabled on the system during the next shut down or reboot. + For this driver version, in order to enable WoL, the igb driver must be + loaded when shutting down or rebooting the system. + + Wake On LAN is only supported on port A of multi-port adapters. + + Wake On LAN is not supported for the Intel(R) Gigabit VT Quad Port Server + Adapter. + + Multiqueue + ---------- + In this mode, a separate MSI-X vector is allocated for each queue and one + for "other" interrupts such as link status change and errors. All + interrupts are throttled via interrupt moderation. Interrupt moderation + must be used to avoid interrupt storms while the driver is processing one + interrupt. The moderation value should be at least as large as the expected + time for the driver to process an interrupt. Multiqueue is off by default. + + REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not + found, the system will fallback to MSI or to Legacy interrupts. + + LRO + --- + Large Receive Offload (LRO) is a technique for increasing inbound throughput + of high-bandwidth network connections by reducing CPU overhead. It works by + aggregating multiple incoming packets from a single stream into a larger + buffer before they are passed higher up the networking stack, thus reducing + the number of packets that have to be processed. LRO combines multiple + Ethernet frames into a single receive in the stack, thereby potentially + decreasing CPU utilization for receives. + + NOTE: You need to have inet_lro enabled via either the CONFIG_INET_LRO or + CONFIG_INET_LRO_MODULE kernel config option. Additionally, if + CONFIG_INET_LRO_MODULE is used, the inet_lro module needs to be loaded + before the igb driver. + + You can verify that the driver is using LRO by looking at these counters in + Ethtool: + + lro_aggregated - count of total packets that were combined + lro_flushed - counts the number of packets flushed out of LRO + lro_no_desc - counts the number of times an LRO descriptor was not available + for the LRO packet + + NOTE: IPv6 and UDP are not supported by LRO. + +Support +======= + +For general information, go to the Intel support website at: + + www.intel.com/support/ + +or the Intel Wired Networking project hosted by Sourceforge at: + + http://sourceforge.net/projects/e1000 + +If an issue is identified with the released source code on the supported +kernel with a supported adapter, email the specific information related +to the issue to e1000-devel@lists.sf.net diff --git a/Documentation/networking/igbvf.txt b/Documentation/networking/igbvf.txt new file mode 100644 index 00000000000..056028138d9 --- /dev/null +++ b/Documentation/networking/igbvf.txt @@ -0,0 +1,78 @@ +Linux* Base Driver for Intel(R) Network Connection +================================================== + +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. + +Contents +======== + +- Identifying Your Adapter +- Additional Configurations +- Support + +This file describes the igbvf Linux* Base Driver for Intel Network Connection. + +The igbvf driver supports 82576-based virtual function devices that can only +be activated on kernels that support SR-IOV. SR-IOV requires the correct +platform and OS support. + +The igbvf driver requires the igb driver, version 2.0 or later. The igbvf +driver supports virtual functions generated by the igb driver with a max_vfs +value of 1 or greater. For more information on the max_vfs parameter refer +to the README included with the igb driver. + +The guest OS loading the igbvf driver must support MSI-X interrupts. + +This driver is only supported as a loadable module at this time. Intel is +not supplying patches against the kernel source to allow for static linking +of the driver. For questions related to hardware requirements, refer to the +documentation supplied with your Intel Gigabit adapter. All hardware +requirements listed apply to use with Linux. + +Instructions on updating ethtool can be found in the section "Additional +Configurations" later in this document. + +VLANs: There is a limit of a total of 32 shared VLANs to 1 or more VFs. + +Identifying Your Adapter +======================== + +The igbvf driver supports 82576-based virtual function devices that can only +be activated on kernels that support SR-IOV. + +For more information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: + + http://support.intel.com/support/go/network/adapter/idguide.htm + +For the latest Intel network drivers for Linux, refer to the following +website. In the search field, enter your adapter name or type, or use the +networking link on the left to search for your adapter: + + http://downloadcenter.intel.com/scripts-df-external/Support_Intel.aspx + +Additional Configurations +========================= + + Ethtool + ------- + The driver utilizes the ethtool interface for driver configuration and + diagnostics, as well as displaying statistical information. + + http://sourceforge.net/projects/gkernel. + +Support +======= + +For general information, go to the Intel support website at: + + http://support.intel.com + +or the Intel Wired Networking project hosted by Sourceforge at: + + http://sourceforge.net/projects/e1000 + +If an issue is identified with the released source code on the supported +kernel with a supported adapter, email the specific information related +to the issue to e1000-devel@lists.sf.net diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 006b39dec87..f350c69b2bb 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -487,6 +487,30 @@ tcp_dma_copybreak - INTEGER and CONFIG_NET_DMA is enabled. Default: 4096 +tcp_thin_linear_timeouts - BOOLEAN + Enable dynamic triggering of linear timeouts for thin streams. + If set, a check is performed upon retransmission by timeout to + determine if the stream is thin (less than 4 packets in flight). + As long as the stream is found to be thin, up to 6 linear + timeouts may be performed before exponential backoff mode is + initiated. This improves retransmission latency for + non-aggressive thin streams, often found to be time-dependent. + For more information on thin streams, see + Documentation/networking/tcp-thin.txt + Default: 0 + +tcp_thin_dupack - BOOLEAN + Enable dynamic triggering of retransmissions after one dupACK + for thin streams. If set, a check is performed upon reception + of a dupACK to determine if the stream is thin (less than 4 + packets in flight). As long as the stream is found to be thin, + data is retransmitted on the first received dupACK. This + improves retransmission latency for non-aggressive thin + streams, often found to be time-dependent. + For more information on thin streams, see + Documentation/networking/tcp-thin.txt + Default: 0 + UDP variables: udp_mem - vector of 3 INTEGERs: min, pressure, max @@ -564,6 +588,37 @@ ip_local_port_range - 2 INTEGERS (i.e. by default) range 1024-4999 is enough to issue up to 2000 connections per second to systems supporting timestamps. +ip_local_reserved_ports - list of comma separated ranges + Specify the ports which are reserved for known third-party + applications. These ports will not be used by automatic port + assignments (e.g. when calling connect() or bind() with port + number 0). Explicit port allocation behavior is unchanged. + + The format used for both input and output is a comma separated + list of ranges (e.g. "1,2-4,10-10" for ports 1, 2, 3, 4 and + 10). Writing to the file will clear all previously reserved + ports and update the current list with the one given in the + input. + + Note that ip_local_port_range and ip_local_reserved_ports + settings are independent and both are considered by the kernel + when determining which ports are available for automatic port + assignments. + + You can reserve ports which are not in the current + ip_local_port_range, e.g.: + + $ cat /proc/sys/net/ipv4/ip_local_port_range + 32000 61000 + $ cat /proc/sys/net/ipv4/ip_local_reserved_ports + 8080,9148 + + although this is redundant. However such a setting is useful + if later the port range is changed to a value that will + include the reserved ports. + + Default: Empty + ip_nonlocal_bind - BOOLEAN If set, allows processes to bind() to non-local IP addresses, which can be quite useful - but may break some applications. @@ -692,6 +747,25 @@ proxy_arp - BOOLEAN conf/{all,interface}/proxy_arp is set to TRUE, it will be disabled otherwise +proxy_arp_pvlan - BOOLEAN + Private VLAN proxy arp. + Basically allow proxy arp replies back to the same interface + (from which the ARP request/solicitation was received). + + This is done to support (ethernet) switch features, like RFC + 3069, where the individual ports are NOT allowed to + communicate with each other, but they are allowed to talk to + the upstream router. As described in RFC 3069, it is possible + to allow these hosts to communicate through the upstream + router by proxy_arp'ing. Don't need to be used together with + proxy_arp. + + This technology is known by different names: + In RFC 3069 it is called VLAN Aggregation. + Cisco and Allied Telesyn call it Private VLAN. + Hewlett-Packard call it Source-Port filtering or port-isolation. + Ericsson call it MAC-Forced Forwarding (RFC Draft). + shared_media - BOOLEAN Send(router) or accept(host) RFC1620 shared media redirects. Overrides ip_secure_redirects. @@ -829,13 +903,22 @@ arp_ignore - INTEGER arp_notify - BOOLEAN Define mode for notification of address and device changes. 0 - (default): do nothing - 1 - Generate gratuitous arp replies when device is brought up + 1 - Generate gratuitous arp requests when device is brought up or hardware address changes. arp_accept - BOOLEAN - Define behavior when gratuitous arp replies are received: - 0 - drop gratuitous arp frames - 1 - accept gratuitous arp frames + Define behavior for gratuitous ARP frames who's IP is not + already present in the ARP table: + 0 - don't create new entries in the ARP table + 1 - create new entries in the ARP table + + Both replies and requests type gratuitous arp will trigger the + ARP table to be updated, if this setting is on. + + If the ARP table already contains the IP address of the + gratuitous arp frame, the arp table will be updated regardless + if this setting is on or off. + app_solicit - INTEGER The maximum number of probes to send to the user space ARP daemon @@ -1074,10 +1157,10 @@ regen_max_retry - INTEGER Default: 5 max_addresses - INTEGER - Number of maximum addresses per interface. 0 disables limitation. - It is recommended not set too large value (or 0) because it would - be too easy way to crash kernel to allow to create too much of - autoconfigured addresses. + Maximum number of autoconfigured addresses per interface. Setting + to zero disables the limitation. It is not recommended to set this + value too large (or to zero) because it would be an easy way to + crash the kernel by allowing too many addresses to be created. Default: 16 disable_ipv6 - BOOLEAN diff --git a/Documentation/networking/ipddp.txt b/Documentation/networking/ipddp.txt index 661a5558dd8..ba5c217fffe 100644 --- a/Documentation/networking/ipddp.txt +++ b/Documentation/networking/ipddp.txt @@ -36,11 +36,6 @@ AppleTalk-IP to IP decapsulation. Basic instructions for user space tools ======================================= -To enable AppleTalk-IP decapsulation/encapsulation you will need the -proper tools. You can get the tools for decapsulation from -http://spacs1.spacs.k12.wi.us/~jschlst/index.html and for encapsulation -from http://www.maths.unm.edu/~bradford/ltpc.html - I will briefly describe the operation of the tools, but you will need to consult the supporting documentation for each set of tools. diff --git a/Documentation/networking/iphase.txt b/Documentation/networking/iphase.txt index 55eac4a784e..670b72f1658 100644 --- a/Documentation/networking/iphase.txt +++ b/Documentation/networking/iphase.txt @@ -22,7 +22,7 @@ The features and limitations of this driver are as follows: - All variants of Interphase ATM PCI (i)Chip adapter cards are supported, including x575 (OC3, control memory 128K , 512K and packet memory 128K, 512K and 1M), x525 (UTP25) and x531 (DS3 and E3). See - http://www.iphase.com/site/iphase-web/?epi_menuItemID=e196f04b4b3b40502f150882e21046a0 + http://www.iphase.com/ for details. - Only x86 platforms are supported. - SMP is supported. diff --git a/Documentation/networking/ixgbevf.txt b/Documentation/networking/ixgbevf.txt new file mode 100644 index 00000000000..21dd5d15b6b --- /dev/null +++ b/Documentation/networking/ixgbevf.txt @@ -0,0 +1,56 @@ +Linux* Base Driver for Intel(R) Network Connection +================================================== + +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. + +Contents +======== + +- Identifying Your Adapter +- Known Issues/Troubleshooting +- Support + +This file describes the ixgbevf Linux* Base Driver for Intel Network +Connection. + +The ixgbevf driver supports 82599-based virtual function devices that can only +be activated on kernels with CONFIG_PCI_IOV enabled. + +The ixgbevf driver supports virtual functions generated by the ixgbe driver +with a max_vfs value of 1 or greater. + +The guest OS loading the ixgbevf driver must support MSI-X interrupts. + +VLANs: There is a limit of a total of 32 shared VLANs to 1 or more VFs. + +Identifying Your Adapter +======================== + +For more information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: + + http://support.intel.com/support/go/network/adapter/idguide.htm + +Known Issues/Troubleshooting +============================ + + Unloading Physical Function (PF) Driver Causes System Reboots When VM is + Running and VF is Loaded on the VM + ------------------------------------------------------------------------ + Do not unload the PF driver (ixgbe) while VFs are assigned to guests. + +Support +======= + +For general information, go to the Intel support website at: + + http://support.intel.com + +or the Intel Wired Networking project hosted by Sourceforge at: + + http://sourceforge.net/projects/e1000 + +If an issue is identified with the released source code on the supported +kernel with a supported adapter, email the specific information related +to the issue to e1000-devel@lists.sf.net diff --git a/Documentation/networking/l2tp.txt b/Documentation/networking/l2tp.txt index 63214b280e0..e7bf3979fac 100644 --- a/Documentation/networking/l2tp.txt +++ b/Documentation/networking/l2tp.txt @@ -1,44 +1,95 @@ -This brief document describes how to use the kernel's PPPoL2TP driver -to provide L2TP functionality. L2TP is a protocol that tunnels one or -more PPP sessions over a UDP tunnel. It is commonly used for VPNs +This document describes how to use the kernel's L2TP drivers to +provide L2TP functionality. L2TP is a protocol that tunnels one or +more sessions over an IP tunnel. It is commonly used for VPNs (L2TP/IPSec) and by ISPs to tunnel subscriber PPP sessions over an IP -network infrastructure. +network infrastructure. With L2TPv3, it is also useful as a Layer-2 +tunneling infrastructure. + +Features +======== + +L2TPv2 (PPP over L2TP (UDP tunnels)). +L2TPv3 ethernet pseudowires. +L2TPv3 PPP pseudowires. +L2TPv3 IP encapsulation. +Netlink sockets for L2TPv3 configuration management. + +History +======= + +The original pppol2tp driver was introduced in 2.6.23 and provided +L2TPv2 functionality (rfc2661). L2TPv2 is used to tunnel one or more PPP +sessions over a UDP tunnel. + +L2TPv3 (rfc3931) changes the protocol to allow different frame types +to be passed over an L2TP tunnel by moving the PPP-specific parts of +the protocol out of the core L2TP packet headers. Each frame type is +known as a pseudowire type. Ethernet, PPP, HDLC, Frame Relay and ATM +pseudowires for L2TP are defined in separate RFC standards. Another +change for L2TPv3 is that it can be carried directly over IP with no +UDP header (UDP is optional). It is also possible to create static +unmanaged L2TPv3 tunnels manually without a control protocol +(userspace daemon) to manage them. + +To support L2TPv3, the original pppol2tp driver was split up to +separate the L2TP and PPP functionality. Existing L2TPv2 userspace +apps should be unaffected as the original pppol2tp sockets API is +retained. L2TPv3, however, uses netlink to manage L2TPv3 tunnels and +sessions. Design ====== -The PPPoL2TP driver, drivers/net/pppol2tp.c, provides a mechanism by -which PPP frames carried through an L2TP session are passed through -the kernel's PPP subsystem. The standard PPP daemon, pppd, handles all -PPP interaction with the peer. PPP network interfaces are created for -each local PPP endpoint. - -The L2TP protocol http://www.faqs.org/rfcs/rfc2661.html defines L2TP -control and data frames. L2TP control frames carry messages between -L2TP clients/servers and are used to setup / teardown tunnels and -sessions. An L2TP client or server is implemented in userspace and -will use a regular UDP socket per tunnel. L2TP data frames carry PPP -frames, which may be PPP control or PPP data. The kernel's PPP +The L2TP protocol separates control and data frames. The L2TP kernel +drivers handle only L2TP data frames; control frames are always +handled by userspace. L2TP control frames carry messages between L2TP +clients/servers and are used to setup / teardown tunnels and +sessions. An L2TP client or server is implemented in userspace. + +Each L2TP tunnel is implemented using a UDP or L2TPIP socket; L2TPIP +provides L2TPv3 IP encapsulation (no UDP) and is implemented using a +new l2tpip socket family. The tunnel socket is typically created by +userspace, though for unmanaged L2TPv3 tunnels, the socket can also be +created by the kernel. Each L2TP session (pseudowire) gets a network +interface instance. In the case of PPP, these interfaces are created +indirectly by pppd using a pppol2tp socket. In the case of ethernet, +the netdevice is created upon a netlink request to create an L2TPv3 +ethernet pseudowire. + +For PPP, the PPPoL2TP driver, net/l2tp/l2tp_ppp.c, provides a +mechanism by which PPP frames carried through an L2TP session are +passed through the kernel's PPP subsystem. The standard PPP daemon, +pppd, handles all PPP interaction with the peer. PPP network +interfaces are created for each local PPP endpoint. The kernel's PPP subsystem arranges for PPP control frames to be delivered to pppd, while data frames are forwarded as usual. +For ethernet, the L2TPETH driver, net/l2tp/l2tp_eth.c, implements a +netdevice driver, managing virtual ethernet devices, one per +pseudowire. These interfaces can be managed using standard Linux tools +such as "ip" and "ifconfig". If only IP frames are passed over the +tunnel, the interface can be given an IP addresses of itself and its +peer. If non-IP frames are to be passed over the tunnel, the interface +can be added to a bridge using brctl. All L2TP datapath protocol +functions are handled by the L2TP core driver. + Each tunnel and session within a tunnel is assigned a unique tunnel_id and session_id. These ids are carried in the L2TP header of every -control and data packet. The pppol2tp driver uses them to lookup -internal tunnel and/or session contexts. Zero tunnel / session ids are -treated specially - zero ids are never assigned to tunnels or sessions -in the network. In the driver, the tunnel context keeps a pointer to -the tunnel UDP socket. The session context keeps a pointer to the -PPPoL2TP socket, as well as other data that lets the driver interface -to the kernel PPP subsystem. - -Note that the pppol2tp kernel driver handles only L2TP data frames; -L2TP control frames are simply passed up to userspace in the UDP -tunnel socket. The kernel handles all datapath aspects of the -protocol, including data packet resequencing (if enabled). - -There are a number of requirements on the userspace L2TP daemon in -order to use the pppol2tp driver. +control and data packet. (Actually, in L2TPv3, the tunnel_id isn't +present in data frames - it is inferred from the IP connection on +which the packet was received.) The L2TP driver uses the ids to lookup +internal tunnel and/or session contexts to determine how to handle the +packet. Zero tunnel / session ids are treated specially - zero ids are +never assigned to tunnels or sessions in the network. In the driver, +the tunnel context keeps a reference to the tunnel UDP or L2TPIP +socket. The session context holds data that lets the driver interface +to the kernel's network frame type subsystems, i.e. PPP, ethernet. + +Userspace Programming +===================== + +For L2TPv2, there are a number of requirements on the userspace L2TP +daemon in order to use the pppol2tp driver. 1. Use a UDP socket per tunnel. @@ -86,6 +137,35 @@ In addition to the standard PPP ioctls, a PPPIOCGL2TPSTATS is provided to retrieve tunnel and session statistics from the kernel using the PPPoX socket of the appropriate tunnel or session. +For L2TPv3, userspace must use the netlink API defined in +include/linux/l2tp.h to manage tunnel and session contexts. The +general procedure to create a new L2TP tunnel with one session is:- + +1. Open a GENL socket using L2TP_GENL_NAME for configuring the kernel + using netlink. + +2. Create a UDP or L2TPIP socket for the tunnel. + +3. Create a new L2TP tunnel using a L2TP_CMD_TUNNEL_CREATE + request. Set attributes according to desired tunnel parameters, + referencing the UDP or L2TPIP socket created in the previous step. + +4. Create a new L2TP session in the tunnel using a + L2TP_CMD_SESSION_CREATE request. + +The tunnel and all of its sessions are closed when the tunnel socket +is closed. The netlink API may also be used to delete sessions and +tunnels. Configuration and status info may be set or read using netlink. + +The L2TP driver also supports static (unmanaged) L2TPv3 tunnels. These +are where there is no L2TP control message exchange with the peer to +setup the tunnel; the tunnel is configured manually at each end of the +tunnel. There is no need for an L2TP userspace application in this +case -- the tunnel socket is created by the kernel and configured +using parameters sent in the L2TP_CMD_TUNNEL_CREATE netlink +request. The "ip" utility of iproute2 has commands for managing static +L2TPv3 tunnels; do "ip l2tp help" for more information. + Debugging ========= @@ -102,6 +182,69 @@ PPPOL2TP_MSG_CONTROL userspace - kernel interface PPPOL2TP_MSG_SEQ sequence numbers handling PPPOL2TP_MSG_DATA data packets +If enabled, files under a l2tp debugfs directory can be used to dump +kernel state about L2TP tunnels and sessions. To access it, the +debugfs filesystem must first be mounted. + +# mount -t debugfs debugfs /debug + +Files under the l2tp directory can then be accessed. + +# cat /debug/l2tp/tunnels + +The debugfs files should not be used by applications to obtain L2TP +state information because the file format is subject to change. It is +implemented to provide extra debug information to help diagnose +problems.) Users should use the netlink API. + +/proc/net/pppol2tp is also provided for backwards compaibility with +the original pppol2tp driver. It lists information about L2TPv2 +tunnels and sessions only. Its use is discouraged. + +Unmanaged L2TPv3 Tunnels +======================== + +Some commercial L2TP products support unmanaged L2TPv3 ethernet +tunnels, where there is no L2TP control protocol; tunnels are +configured at each side manually. New commands are available in +iproute2's ip utility to support this. + +To create an L2TPv3 ethernet pseudowire between local host 192.168.1.1 +and peer 192.168.1.2, using IP addresses 10.5.1.1 and 10.5.1.2 for the +tunnel endpoints:- + +# modprobe l2tp_eth +# modprobe l2tp_netlink + +# ip l2tp add tunnel tunnel_id 1 peer_tunnel_id 1 udp_sport 5000 \ + udp_dport 5000 encap udp local 192.168.1.1 remote 192.168.1.2 +# ip l2tp add session tunnel_id 1 session_id 1 peer_session_id 1 +# ifconfig -a +# ip addr add 10.5.1.2/32 peer 10.5.1.1/32 dev l2tpeth0 +# ifconfig l2tpeth0 up + +Choose IP addresses to be the address of a local IP interface and that +of the remote system. The IP addresses of the l2tpeth0 interface can be +anything suitable. + +Repeat the above at the peer, with ports, tunnel/session ids and IP +addresses reversed. The tunnel and session IDs can be any non-zero +32-bit number, but the values must be reversed at the peer. + +Host 1 Host2 +udp_sport=5000 udp_sport=5001 +udp_dport=5001 udp_dport=5000 +tunnel_id=42 tunnel_id=45 +peer_tunnel_id=45 peer_tunnel_id=42 +session_id=128 session_id=5196755 +peer_session_id=5196755 peer_session_id=128 + +When done at both ends of the tunnel, it should be possible to send +data over the network. e.g. + +# ping 10.5.1.1 + + Sample Userspace Code ===================== @@ -158,12 +301,48 @@ Sample Userspace Code } return 0; +Internal Implementation +======================= + +The driver keeps a struct l2tp_tunnel context per L2TP tunnel and a +struct l2tp_session context for each session. The l2tp_tunnel is +always associated with a UDP or L2TP/IP socket and keeps a list of +sessions in the tunnel. The l2tp_session context keeps kernel state +about the session. It has private data which is used for data specific +to the session type. With L2TPv2, the session always carried PPP +traffic. With L2TPv3, the session can also carry ethernet frames +(ethernet pseudowire) or other data types such as ATM, HDLC or Frame +Relay. + +When a tunnel is first opened, the reference count on the socket is +increased using sock_hold(). This ensures that the kernel socket +cannot be removed while L2TP's data structures reference it. + +Some L2TP sessions also have a socket (PPP pseudowires) while others +do not (ethernet pseudowires). We can't use the socket reference count +as the reference count for session contexts. The L2TP implementation +therefore has its own internal reference counts on the session +contexts. + +To Do +===== + +Add L2TP tunnel switching support. This would route tunneled traffic +from one L2TP tunnel into another. Specified in +http://tools.ietf.org/html/draft-ietf-l2tpext-tunnel-switching-08 + +Add L2TPv3 VLAN pseudowire support. + +Add L2TPv3 IP pseudowire support. + +Add L2TPv3 ATM pseudowire support. + Miscellaneous -============ +============= -The PPPoL2TP driver was developed as part of the OpenL2TP project by +The L2TP drivers were developed as part of the OpenL2TP project by Katalix Systems Ltd. OpenL2TP is a full-featured L2TP client / server, designed from the ground up to have the L2TP datapath in the kernel. The project also implemented the pppol2tp plugin for pppd which allows pppd to use the kernel driver. Details can be found at -http://openl2tp.sourceforge.net. +http://www.openl2tp.org. diff --git a/Documentation/networking/packet_mmap.txt b/Documentation/networking/packet_mmap.txt index a22fd85e379..073894d1c09 100644 --- a/Documentation/networking/packet_mmap.txt +++ b/Documentation/networking/packet_mmap.txt @@ -2,13 +2,13 @@ + ABSTRACT -------------------------------------------------------------------------------- -This file documents the CONFIG_PACKET_MMAP option available with the PACKET +This file documents the mmap() facility available with the PACKET socket interface on 2.4 and 2.6 kernels. This type of sockets is used for capture network traffic with utilities like tcpdump or any other that needs raw access to network interface. You can find the latest version of this document at: - http://pusa.uv.es/~ulisses/packet_mmap/ + http://wiki.ipxwarzone.com/index.php5?title=Linux_packet_mmap Howto can be found at: http://wiki.gnu-log.net (packet_mmap) @@ -44,7 +44,7 @@ enabled. For transmission, check the MTU (Maximum Transmission Unit) used and supported by devices of your network. -------------------------------------------------------------------------------- -+ How to use CONFIG_PACKET_MMAP to improve capture process ++ How to use mmap() to improve capture process -------------------------------------------------------------------------------- From the user standpoint, you should use the higher level libpcap library, which @@ -56,7 +56,7 @@ support for PACKET_MMAP, and also probably the libpcap included in your distribu I'm aware of two implementations of PACKET_MMAP in libpcap: - http://pusa.uv.es/~ulisses/packet_mmap/ (by Simon Patarin, based on libpcap 0.6.2) + http://wiki.ipxwarzone.com/ (by Simon Patarin, based on libpcap 0.6.2) http://public.lanl.gov/cpw/ (by Phil Wood, based on lastest libpcap) The rest of this document is intended for people who want to understand @@ -64,7 +64,7 @@ the low level details or want to improve libpcap by including PACKET_MMAP support. -------------------------------------------------------------------------------- -+ How to use CONFIG_PACKET_MMAP directly to improve capture process ++ How to use mmap() directly to improve capture process -------------------------------------------------------------------------------- From the system calls stand point, the use of PACKET_MMAP involves @@ -100,12 +100,12 @@ by the kernel. The destruction of the socket and all associated resources is done by a simple call to close(fd). -Next I will describe PACKET_MMAP settings and it's constraints, +Next I will describe PACKET_MMAP settings and its constraints, also the mapping of the circular buffer in the user process and the use of this buffer. -------------------------------------------------------------------------------- -+ How to use CONFIG_PACKET_MMAP directly to improve transmission process ++ How to use mmap() directly to improve transmission process -------------------------------------------------------------------------------- Transmission process is similar to capture as shown below. @@ -432,7 +432,7 @@ TP_STATUS_LOSING : indicates there were packet drops from last time the PACKET_STATISTICS option. TP_STATUS_CSUMNOTREADY: currently it's used for outgoing IP packets which - it's checksum will be done in hardware. So while + its checksum will be done in hardware. So while reading the packet we should not try to check the checksum. @@ -493,6 +493,32 @@ The user can also use poll() to check if a buffer is available: pfd.events = POLLOUT; retval = poll(&pfd, 1, timeout); +------------------------------------------------------------------------------- ++ PACKET_TIMESTAMP +------------------------------------------------------------------------------- + +The PACKET_TIMESTAMP setting determines the source of the timestamp in +the packet meta information. If your NIC is capable of timestamping +packets in hardware, you can request those hardware timestamps to used. +Note: you may need to enable the generation of hardware timestamps with +SIOCSHWTSTAMP. + +PACKET_TIMESTAMP accepts the same integer bit field as +SO_TIMESTAMPING. However, only the SOF_TIMESTAMPING_SYS_HARDWARE +and SOF_TIMESTAMPING_RAW_HARDWARE values are recognized by +PACKET_TIMESTAMP. SOF_TIMESTAMPING_SYS_HARDWARE takes precedence over +SOF_TIMESTAMPING_RAW_HARDWARE if both bits are set. + + int req = 0; + req |= SOF_TIMESTAMPING_SYS_HARDWARE; + setsockopt(fd, SOL_PACKET, PACKET_TIMESTAMP, (void *) &req, sizeof(req)) + +If PACKET_TIMESTAMP is not set, a software timestamp generated inside +the networking stack is used (the behavior before this setting was added). + +See include/linux/net_tstamp.h and Documentation/networking/timestamping +for more information on hardware timestamps. + -------------------------------------------------------------------------------- + THANKS -------------------------------------------------------------------------------- diff --git a/Documentation/networking/pktgen.txt b/Documentation/networking/pktgen.txt index 61bb645d50e..75e4fd708cc 100644 --- a/Documentation/networking/pktgen.txt +++ b/Documentation/networking/pktgen.txt @@ -151,6 +151,8 @@ Examples: pgset stop aborts injection. Also, ^C aborts generator. + pgset "rate 300M" set rate to 300 Mb/s + pgset "ratep 1000000" set rate to 1Mpps Example scripts =============== @@ -241,6 +243,9 @@ src6 flows flowlen +rate +ratep + References: ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/ ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/ diff --git a/Documentation/networking/ray_cs.txt b/Documentation/networking/ray_cs.txt index 145d27a5239..c0c12307ed9 100644 --- a/Documentation/networking/ray_cs.txt +++ b/Documentation/networking/ray_cs.txt @@ -13,8 +13,8 @@ wireless LAN cards. As of kernel 2.3.18, the ray_cs driver is part of the Linux kernel source. My web page for the development of ray_cs is at -http://world.std.com/~corey/raylink.html and I can be emailed at -corey@world.std.com +http://web.ralinktech.com/ralink/Home/Support/Linux.html +and I can be emailed at corey@world.std.com The kernel driver is based on ray_cs-1.62.tgz diff --git a/Documentation/networking/regulatory.txt b/Documentation/networking/regulatory.txt index ee31369e9e5..9551622d0a7 100644 --- a/Documentation/networking/regulatory.txt +++ b/Documentation/networking/regulatory.txt @@ -188,3 +188,27 @@ Then in some part of your code after your wiphy has been registered: &mydriver_jp_regdom.reg_rules[i], sizeof(struct ieee80211_reg_rule)); regulatory_struct_hint(rd); + +Statically compiled regulatory database +--------------------------------------- + +In most situations the userland solution using CRDA as described +above is the preferred solution. However in some cases a set of +rules built into the kernel itself may be desirable. To account +for this situation, a configuration option has been provided +(i.e. CONFIG_CFG80211_INTERNAL_REGDB). With this option enabled, +the wireless database information contained in net/wireless/db.txt is +used to generate a data structure encoded in net/wireless/regdb.c. +That option also enables code in net/wireless/reg.c which queries +the data in regdb.c as an alternative to using CRDA. + +The file net/wireless/db.txt should be kept up-to-date with the db.txt +file available in the git repository here: + + git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-regdb.git + +Again, most users in most situations should be using the CRDA package +provided with their distribution, and in most other situations users +should be building and using CRDA on their own rather than using +this option. If you are not absolutely sure that you should be using +CONFIG_CFG80211_INTERNAL_REGDB then _DO_NOT_USE_IT_. diff --git a/Documentation/networking/s2io.txt b/Documentation/networking/s2io.txt index c3d6b4d5d01..9d4e0f4df5a 100644 --- a/Documentation/networking/s2io.txt +++ b/Documentation/networking/s2io.txt @@ -133,7 +133,8 @@ bring down CPU utilization. ** For AMD opteron platforms with 8131 chipset, MMRBC=1 and MOST=1 are recommended as safe parameters. For more information, please review the AMD8131 errata at -http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26310.pdf +http://vip.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/ +26310_AMD-8131_HyperTransport_PCI-X_Tunnel_Revision_Guide_rev_3_18.pdf 6. Available Downloads Neterion "s2io" driver in Red Hat and Suse 2.6-based distributions is kept up diff --git a/Documentation/networking/skfp.txt b/Documentation/networking/skfp.txt index abfddf81e34..203ec66c9fb 100644 --- a/Documentation/networking/skfp.txt +++ b/Documentation/networking/skfp.txt @@ -68,7 +68,7 @@ Compaq adapters (not tested): ======================= From v2.01 on, the driver is integrated in the linux kernel sources. -Therefor, the installation is the same as for any other adapter +Therefore, the installation is the same as for any other adapter supported by the kernel. Refer to the manual of your distribution about the installation of network adapters. diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt new file mode 100644 index 00000000000..7ee770b5ef5 --- /dev/null +++ b/Documentation/networking/stmmac.txt @@ -0,0 +1,143 @@ + STMicroelectronics 10/100/1000 Synopsys Ethernet driver + +Copyright (C) 2007-2010 STMicroelectronics Ltd +Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> + +This is the driver for the MAC 10/100/1000 on-chip Ethernet controllers +(Synopsys IP blocks); it has been fully tested on STLinux platforms. + +Currently this network device driver is for all STM embedded MAC/GMAC +(7xxx SoCs). + +DWC Ether MAC 10/100/1000 Universal version 3.41a and DWC Ether MAC 10/100 +Universal version 4.0 have been used for developing the first code +implementation. + +Please, for more information also visit: www.stlinux.com + +1) Kernel Configuration +The kernel configuration option is STMMAC_ETH: + Device Drivers ---> Network device support ---> Ethernet (1000 Mbit) ---> + STMicroelectronics 10/100/1000 Ethernet driver (STMMAC_ETH) + +2) Driver parameters list: + debug: message level (0: no output, 16: all); + phyaddr: to manually provide the physical address to the PHY device; + dma_rxsize: DMA rx ring size; + dma_txsize: DMA tx ring size; + buf_sz: DMA buffer size; + tc: control the HW FIFO threshold; + tx_coe: Enable/Disable Tx Checksum Offload engine; + watchdog: transmit timeout (in milliseconds); + flow_ctrl: Flow control ability [on/off]; + pause: Flow Control Pause Time; + tmrate: timer period (only if timer optimisation is configured). + +3) Command line options +Driver parameters can be also passed in command line by using: + stmmaceth=dma_rxsize:128,dma_txsize:512 + +4) Driver information and notes + +4.1) Transmit process +The xmit method is invoked when the kernel needs to transmit a packet; it sets +the descriptors in the ring and informs the DMA engine that there is a packet +ready to be transmitted. +Once the controller has finished transmitting the packet, an interrupt is +triggered; So the driver will be able to release the socket buffers. +By default, the driver sets the NETIF_F_SG bit in the features field of the +net_device structure enabling the scatter/gather feature. + +4.2) Receive process +When one or more packets are received, an interrupt happens. The interrupts +are not queued so the driver has to scan all the descriptors in the ring during +the receive process. +This is based on NAPI so the interrupt handler signals only if there is work to be +done, and it exits. +Then the poll method will be scheduled at some future point. +The incoming packets are stored, by the DMA, in a list of pre-allocated socket +buffers in order to avoid the memcpy (Zero-copy). + +4.3) Timer-Driver Interrupt +Instead of having the device that asynchronously notifies the frame receptions, the +driver configures a timer to generate an interrupt at regular intervals. +Based on the granularity of the timer, the frames that are received by the device +will experience different levels of latency. Some NICs have dedicated timer +device to perform this task. STMMAC can use either the RTC device or the TMU +channel 2 on STLinux platforms. +The timers frequency can be passed to the driver as parameter; when change it, +take care of both hardware capability and network stability/performance impact. +Several performance tests on STM platforms showed this optimisation allows to spare +the CPU while having the maximum throughput. + +4.4) WOL +Wake up on Lan feature through Magic Frame is only supported for the GMAC +core. + +4.5) DMA descriptors +Driver handles both normal and enhanced descriptors. The latter has been only +tested on DWC Ether MAC 10/100/1000 Universal version 3.41a. + +4.6) Ethtool support +Ethtool is supported. Driver statistics and internal errors can be taken using: +ethtool -S ethX command. It is possible to dump registers etc. + +4.7) Jumbo and Segmentation Offloading +Jumbo frames are supported and tested for the GMAC. +The GSO has been also added but it's performed in software. +LRO is not supported. + +4.8) Physical +The driver is compatible with PAL to work with PHY and GPHY devices. + +4.9) Platform information +Several information came from the platform; please refer to the +driver's Header file in include/linux directory. + +struct plat_stmmacenet_data { + int bus_id; + int pbl; + int has_gmac; + void (*fix_mac_speed)(void *priv, unsigned int speed); + void (*bus_setup)(unsigned long ioaddr); +#ifdef CONFIG_STM_DRIVERS + struct stm_pad_config *pad_config; +#endif + void *bsp_priv; +}; + +Where: +- pbl (Programmable Burst Length) is maximum number of + beats to be transferred in one DMA transaction. + GMAC also enables the 4xPBL by default. +- fix_mac_speed and bus_setup are used to configure internal target + registers (on STM platforms); +- has_gmac: GMAC core is on board (get it at run-time in the next step); +- bus_id: bus identifier. + +struct plat_stmmacphy_data { + int bus_id; + int phy_addr; + unsigned int phy_mask; + int interface; + int (*phy_reset)(void *priv); + void *priv; +}; + +Where: +- bus_id: bus identifier; +- phy_addr: physical address used for the attached phy device; + set it to -1 to get it at run-time; +- interface: physical MII interface mode; +- phy_reset: hook to reset HW function. + +TODO: +- Continue to make the driver more generic and suitable for other Synopsys + Ethernet controllers used on other architectures (i.e. ARM). +- 10G controllers are not supported. +- MAC uses Normal descriptors and GMAC uses enhanced ones. + This is a limit that should be reviewed. MAC could want to + use the enhanced structure. +- Checksumming: Rx/Tx csum is done in HW in case of GMAC only. +- Review the timer optimisation code to use an embedded device that seems to be + available in new chip generations. diff --git a/Documentation/networking/tcp-thin.txt b/Documentation/networking/tcp-thin.txt new file mode 100644 index 00000000000..151e229980f --- /dev/null +++ b/Documentation/networking/tcp-thin.txt @@ -0,0 +1,47 @@ +Thin-streams and TCP +==================== +A wide range of Internet-based services that use reliable transport +protocols display what we call thin-stream properties. This means +that the application sends data with such a low rate that the +retransmission mechanisms of the transport protocol are not fully +effective. In time-dependent scenarios (like online games, control +systems, stock trading etc.) where the user experience depends +on the data delivery latency, packet loss can be devastating for +the service quality. Extreme latencies are caused by TCP's +dependency on the arrival of new data from the application to trigger +retransmissions effectively through fast retransmit instead of +waiting for long timeouts. + +After analysing a large number of time-dependent interactive +applications, we have seen that they often produce thin streams +and also stay with this traffic pattern throughout its entire +lifespan. The combination of time-dependency and the fact that the +streams provoke high latencies when using TCP is unfortunate. + +In order to reduce application-layer latency when packets are lost, +a set of mechanisms has been made, which address these latency issues +for thin streams. In short, if the kernel detects a thin stream, +the retransmission mechanisms are modified in the following manner: + +1) If the stream is thin, fast retransmit on the first dupACK. +2) If the stream is thin, do not apply exponential backoff. + +These enhancements are applied only if the stream is detected as +thin. This is accomplished by defining a threshold for the number +of packets in flight. If there are less than 4 packets in flight, +fast retransmissions can not be triggered, and the stream is prone +to experience high retransmission latencies. + +Since these mechanisms are targeted at time-dependent applications, +they must be specifically activated by the application using the +TCP_THIN_LINEAR_TIMEOUTS and TCP_THIN_DUPACK IOCTLS or the +tcp_thin_linear_timeouts and tcp_thin_dupack sysctls. Both +modifications are turned off by default. + +References +========== +More information on the modifications, as well as a wide range of +experimental data can be found here: +"Improving latency for interactive, thin-stream applications over +reliable transport" +http://simula.no/research/nd/publications/Simula.nd.477/simula_pdf_file diff --git a/Documentation/networking/timestamping.txt b/Documentation/networking/timestamping.txt index 0e58b453917..e8c8f4f06c6 100644 --- a/Documentation/networking/timestamping.txt +++ b/Documentation/networking/timestamping.txt @@ -41,11 +41,12 @@ SOF_TIMESTAMPING_SOFTWARE: return system time stamp generated in SOF_TIMESTAMPING_TX/RX determine how time stamps are generated. SOF_TIMESTAMPING_RAW/SYS determine how they are reported in the following control message: - struct scm_timestamping { - struct timespec systime; - struct timespec hwtimetrans; - struct timespec hwtimeraw; - }; + +struct scm_timestamping { + struct timespec systime; + struct timespec hwtimetrans; + struct timespec hwtimeraw; +}; recvmsg() can be used to get this control message for regular incoming packets. For send time stamps the outgoing packet is looped back to @@ -87,12 +88,13 @@ by the network device and will be empty without that support. SIOCSHWTSTAMP: Hardware time stamping must also be initialized for each device driver -that is expected to do hardware time stamping. The parameter is: +that is expected to do hardware time stamping. The parameter is defined in +/include/linux/net_tstamp.h as: struct hwtstamp_config { - int flags; /* no flags defined right now, must be zero */ - int tx_type; /* HWTSTAMP_TX_* */ - int rx_filter; /* HWTSTAMP_FILTER_* */ + int flags; /* no flags defined right now, must be zero */ + int tx_type; /* HWTSTAMP_TX_* */ + int rx_filter; /* HWTSTAMP_FILTER_* */ }; Desired behavior is passed into the kernel and to a specific device by @@ -139,42 +141,56 @@ enum { /* time stamp any incoming packet */ HWTSTAMP_FILTER_ALL, - /* return value: time stamp all packets requested plus some others */ - HWTSTAMP_FILTER_SOME, + /* return value: time stamp all packets requested plus some others */ + HWTSTAMP_FILTER_SOME, /* PTP v1, UDP, any kind of event packet */ HWTSTAMP_FILTER_PTP_V1_L4_EVENT, - ... + /* for the complete list of values, please check + * the include file /include/linux/net_tstamp.h + */ }; DEVICE IMPLEMENTATION A driver which supports hardware time stamping must support the -SIOCSHWTSTAMP ioctl. Time stamps for received packets must be stored -in the skb with skb_hwtstamp_set(). +SIOCSHWTSTAMP ioctl and update the supplied struct hwtstamp_config with +the actual values as described in the section on SIOCSHWTSTAMP. + +Time stamps for received packets must be stored in the skb. To get a pointer +to the shared time stamp structure of the skb call skb_hwtstamps(). Then +set the time stamps in the structure: + +struct skb_shared_hwtstamps { + /* hardware time stamp transformed into duration + * since arbitrary point in time + */ + ktime_t hwtstamp; + ktime_t syststamp; /* hwtstamp transformed to system time base */ +}; Time stamps for outgoing packets are to be generated as follows: -- In hard_start_xmit(), check if skb_hwtstamp_check_tx_hardware() - returns non-zero. If yes, then the driver is expected - to do hardware time stamping. +- In hard_start_xmit(), check if skb_tx(skb)->hardware is set no-zero. + If yes, then the driver is expected to do hardware time stamping. - If this is possible for the skb and requested, then declare - that the driver is doing the time stamping by calling - skb_hwtstamp_tx_in_progress(). A driver not supporting - hardware time stamping doesn't do that. A driver must never - touch sk_buff::tstamp! It is used to store how time stamping - for an outgoing packets is to be done. + that the driver is doing the time stamping by setting the field + skb_tx(skb)->in_progress non-zero. You might want to keep a pointer + to the associated skb for the next step and not free the skb. A driver + not supporting hardware time stamping doesn't do that. A driver must + never touch sk_buff::tstamp! It is used to store software generated + time stamps by the network subsystem. - As soon as the driver has sent the packet and/or obtained a hardware time stamp for it, it passes the time stamp back by calling skb_hwtstamp_tx() with the original skb, the raw - hardware time stamp and a handle to the device (necessary - to convert the hardware time stamp to system time). If obtaining - the hardware time stamp somehow fails, then the driver should - not fall back to software time stamping. The rationale is that - this would occur at a later time in the processing pipeline - than other software time stamping and therefore could lead - to unexpected deltas between time stamps. -- If the driver did not call skb_hwtstamp_tx_in_progress(), then + hardware time stamp. skb_hwtstamp_tx() clones the original skb and + adds the timestamps, therefore the original skb has to be freed now. + If obtaining the hardware time stamp somehow fails, then the driver + should not fall back to software time stamping. The rationale is that + this would occur at a later time in the processing pipeline than other + software time stamping and therefore could lead to unexpected deltas + between time stamps. +- If the driver did not call set skb_tx(skb)->in_progress, then dev_hard_start_xmit() checks whether software time stamping is wanted as fallback and potentially generates the time stamp. diff --git a/Documentation/networking/timestamping/Makefile b/Documentation/networking/timestamping/Makefile index 2a1489fdc03..e79973443e9 100644 --- a/Documentation/networking/timestamping/Makefile +++ b/Documentation/networking/timestamping/Makefile @@ -1,6 +1,13 @@ -CPPFLAGS = -I../../../include +# kbuild trick to avoid linker error. Can be omitted if a module is built. +obj- := dummy.o -timestamping: timestamping.c +# List of programs to build +hostprogs-y := timestamping + +# Tell kbuild to always build the programs +always := $(hostprogs-y) + +HOSTCFLAGS_timestamping.o += -I$(objtree)/usr/include clean: rm -f timestamping diff --git a/Documentation/networking/timestamping/timestamping.c b/Documentation/networking/timestamping/timestamping.c index a7936fe8444..8ba82bfe6a3 100644 --- a/Documentation/networking/timestamping/timestamping.c +++ b/Documentation/networking/timestamping/timestamping.c @@ -41,9 +41,9 @@ #include <arpa/inet.h> #include <net/if.h> -#include "asm/types.h" -#include "linux/net_tstamp.h" -#include "linux/errqueue.h" +#include <asm/types.h> +#include <linux/net_tstamp.h> +#include <linux/errqueue.h> #ifndef SO_TIMESTAMPING # define SO_TIMESTAMPING 37 @@ -164,7 +164,7 @@ static void printpacket(struct msghdr *msg, int res, gettimeofday(&now, 0); - printf("%ld.%06ld: received %s data, %d bytes from %s, %d bytes control messages\n", + printf("%ld.%06ld: received %s data, %d bytes from %s, %zu bytes control messages\n", (long)now.tv_sec, (long)now.tv_usec, (recvmsg_flags & MSG_ERRQUEUE) ? "error" : "regular", res, @@ -173,7 +173,7 @@ static void printpacket(struct msghdr *msg, int res, for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { - printf(" cmsg len %d: ", cmsg->cmsg_len); + printf(" cmsg len %zu: ", cmsg->cmsg_len); switch (cmsg->cmsg_level) { case SOL_SOCKET: printf("SOL_SOCKET "); @@ -370,7 +370,7 @@ int main(int argc, char **argv) } sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP); - if (socket < 0) + if (sock < 0) bail("socket"); memset(&device, 0, sizeof(device)); diff --git a/Documentation/networking/tlan.txt b/Documentation/networking/tlan.txt index 7e6aa5b20c3..34550dfcef7 100644 --- a/Documentation/networking/tlan.txt +++ b/Documentation/networking/tlan.txt @@ -2,7 +2,7 @@ (C) 1998 James Banks (C) 1999-2001 Torben Mathiasen <tmm@image.dk, torben.mathiasen@compaq.com> -For driver information/updates visit http://opensource.compaq.com +For driver information/updates visit http://www.compaq.com TLAN driver for Linux, version 1.14a @@ -113,5 +113,5 @@ III. Things to try if you have problems. There is also a tlan mailing list which you can join by sending "subscribe tlan" in the body of an email to majordomo@vuser.vu.union.edu. -There is also a tlan website at http://opensource.compaq.com +There is also a tlan website at http://www.compaq.com diff --git a/Documentation/networking/udplite.txt b/Documentation/networking/udplite.txt index 855d8da57a2..d727a382910 100644 --- a/Documentation/networking/udplite.txt +++ b/Documentation/networking/udplite.txt @@ -11,11 +11,13 @@ This file briefly describes the existing kernel support and the socket API. For in-depth information, you can consult: - o The UDP-Lite Homepage: http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/ + o The UDP-Lite Homepage: + http://web.archive.org/web/*/http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/ From here you can also download some example application source code. o The UDP-Lite HOWTO on - http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/files/UDP-Lite-HOWTO.txt + http://web.archive.org/web/*/http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/ + files/UDP-Lite-HOWTO.txt o The Wireshark UDP-Lite WiKi (with capture files): http://wiki.wireshark.org/Lightweight_User_Datagram_Protocol @@ -26,12 +28,7 @@ I) APPLICATIONS Several applications have been ported successfully to UDP-Lite. Ethereal - (now called wireshark) has UDP-Litev4/v6 support by default. The tarball on - - http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/files/udplite_linux.tar.gz - - has source code for several v4/v6 client-server and network testing examples. - + (now called wireshark) has UDP-Litev4/v6 support by default. Porting applications to UDP-Lite is straightforward: only socket level and IPPROTO need to be changed; senders additionally set the checksum coverage length (default = header length = 8). Details are in the next section. diff --git a/Documentation/networking/wavelan.txt b/Documentation/networking/wavelan.txt deleted file mode 100644 index afa6e521c68..00000000000 --- a/Documentation/networking/wavelan.txt +++ /dev/null @@ -1,73 +0,0 @@ - The Wavelan drivers saga - ------------------------ - - By Jean Tourrilhes <jt@hpl.hp.com> - - The Wavelan is a Radio network adapter designed by -Lucent. Under this generic name is hidden quite a variety of hardware, -and many Linux driver to support it. - The get the full story on Wireless LANs, please consult : - http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/ - -"wavelan" driver (old ISA Wavelan) ----------------- - o Config : Network device -> Wireless LAN -> AT&T WaveLAN - o Location : .../drivers/net/wireless/wavelan* - o in-line doc : .../drivers/net/wireless/wavelan.p.h - o on-line doc : - http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Wavelan.html - - This is the driver for the ISA version of the first generation -of the Wavelan, now discontinued. The device is 2 Mb/s, composed of a -Intel 82586 controller and a Lucent Modem, and is NOT 802.11 compliant. - The driver has been tested with the following hardware : - o Wavelan ISA 915 MHz (full length ISA card) - o Wavelan ISA 915 MHz 2.0 (half length ISA card) - o Wavelan ISA 2.4 GHz (full length ISA card, fixed frequency) - o Wavelan ISA 2.4 GHz 2.0 (half length ISA card, frequency selectable) - o Above cards with the optional DES encryption feature - -"wavelan_cs" driver (old Pcmcia Wavelan) -------------------- - o Config : Network device -> PCMCIA network -> - Pcmcia Wireless LAN -> AT&T/Lucent WaveLAN - o Location : .../drivers/net/pcmcia/wavelan* - o in-line doc : .../drivers/net/pcmcia/wavelan_cs.h - o on-line doc : - http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Wavelan.html - - This is the driver for the PCMCIA version of the first -generation of the Wavelan, now discontinued. The device is 2 Mb/s, -composed of a Intel 82593 controller (totally different from the 82586) -and a Lucent Modem, and NOT 802.11 compatible. - The driver has been tested with the following hardware : - o Wavelan Pcmcia 915 MHz 2.0 (Pcmcia card + separate - modem/antenna block) - o Wavelan Pcmcia 2.4 GHz 2.0 (Pcmcia card + separate - modem/antenna block) - -"wvlan_cs" driver (Wavelan IEEE, GPL) ------------------ - o Config : Not yet in kernel - o Location : Pcmcia package 3.1.10+ - o on-line doc : http://www.fasta.fh-dortmund.de/users/andy/wvlan/ - - This is the driver for the current generation of Wavelan IEEE, -which is 802.11 compatible. Depending on version, it is 2 Mb/s or 11 -Mb/s, with or without encryption, all implemented in Lucent specific -DSP (the Hermes). - This is a GPL full source PCMCIA driver (ISA is just a Pcmcia -card with ISA-Pcmcia bridge). - -"wavelan2_cs" driver (Wavelan IEEE, binary) --------------------- - o Config : Not yet in kernel - o Location : ftp://sourceforge.org/pcmcia/contrib/ - - This driver support exactly the same hardware as the previous -driver, the main difference is that it is based on a binary library -and supported by Lucent. - - I hope it clears the confusion ;-) - - Jean diff --git a/Documentation/networking/x25-iface.txt b/Documentation/networking/x25-iface.txt index 975cc87ebdd..78f662ee062 100644 --- a/Documentation/networking/x25-iface.txt +++ b/Documentation/networking/x25-iface.txt @@ -20,23 +20,23 @@ the rest of the skbuff, if any more information does exist. Packet Layer to Device Driver ----------------------------- -First Byte = 0x00 +First Byte = 0x00 (X25_IFACE_DATA) This indicates that the rest of the skbuff contains data to be transmitted over the LAPB link. The LAPB link should already exist before any data is passed down. -First Byte = 0x01 +First Byte = 0x01 (X25_IFACE_CONNECT) Establish the LAPB link. If the link is already established then the connect confirmation message should be returned as soon as possible. -First Byte = 0x02 +First Byte = 0x02 (X25_IFACE_DISCONNECT) Terminate the LAPB link. If it is already disconnected then the disconnect confirmation message should be returned as soon as possible. -First Byte = 0x03 +First Byte = 0x03 (X25_IFACE_PARAMS) LAPB parameters. To be defined. @@ -44,22 +44,22 @@ LAPB parameters. To be defined. Device Driver to Packet Layer ----------------------------- -First Byte = 0x00 +First Byte = 0x00 (X25_IFACE_DATA) This indicates that the rest of the skbuff contains data that has been received over the LAPB link. -First Byte = 0x01 +First Byte = 0x01 (X25_IFACE_CONNECT) LAPB link has been established. The same message is used for both a LAPB link connect_confirmation and a connect_indication. -First Byte = 0x02 +First Byte = 0x02 (X25_IFACE_DISCONNECT) LAPB link has been terminated. This same message is used for both a LAPB link disconnect_confirmation and a disconnect_indication. -First Byte = 0x03 +First Byte = 0x03 (X25_IFACE_PARAMS) LAPB parameters. To be defined. |