Commit f7365919 authored by Xie He's avatar Xie He Committed by Jakub Kicinski
Browse files

net: wan: Delete the DLCI / SDLA drivers 



The DLCI driver (dlci.c) implements the Frame Relay protocol. However,
we already have another newer and better implementation of Frame Relay
provided by the HDLC_FR driver (hdlc_fr.c).

The DLCI driver's implementation of Frame Relay is used by only one
hardware driver in the kernel - the SDLA driver (sdla.c).

The SDLA driver provides Frame Relay support for the Sangoma S50x devices.
However, the vendor provides their own driver (along with their own
multi-WAN-protocol implementations including Frame Relay), called WANPIPE.
I believe most users of the hardware would use the vendor-provided WANPIPE
driver instead.

(The WANPIPE driver was even once in the kernel, but was deleted in
commit 8db60bcf ("[WAN]: Remove broken and unmaintained Sangoma
drivers.") because the vendor no longer updated the in-kernel WANPIPE
driver.)

Cc: Mike McLagan <mike.mclagan@linux.org>
Signed-off-by: default avatarXie He <xie.he.0141@gmail.com>
Link: https://lore.kernel.org/r/20201114150921.685594-1-xie.he.0141@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent fccf111e

CREDITS

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@@ -2499,15 +2499,6 @@ W: http://www.rdrop.com/users/paulmck/ 
D: RCU and variants

D: rcutorture module



N: Mike McLagan

E: mike.mclagan@linux.org

W: http://www.invlogic.com/~mmclagan

D: DLCI/FRAD drivers for Sangoma SDLAs

S: Innovative Logic Corp

S: Post Office Box 1068

S: Laurel, Maryland 20732

S: USA



N: Bradley McLean

E: brad@bradpc.gaylord.com

D: Device driver hacker

Documentation/networking/framerelay.rst

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.. SPDX-License-Identifier: GPL-2.0



================

Frame Relay (FR)

================



Frame Relay (FR) support for linux is built into a two tiered system of device

drivers.  The upper layer implements RFC1490 FR specification, and uses the

Data Link Connection Identifier (DLCI) as its hardware address.  Usually these

are assigned by your network supplier, they give you the number/numbers of

the Virtual Connections (VC) assigned to you.



Each DLCI is a point-to-point link between your machine and a remote one.

As such, a separate device is needed to accommodate the routing.  Within the

net-tools archives is 'dlcicfg'.  This program will communicate with the

base "DLCI" device, and create new net devices named 'dlci00', 'dlci01'...

The configuration script will ask you how many DLCIs you need, as well as

how many DLCIs you want to assign to each Frame Relay Access Device (FRAD).



The DLCI uses a number of function calls to communicate with the FRAD, all

of which are stored in the FRAD's private data area.  assoc/deassoc,

activate/deactivate and dlci_config.  The DLCI supplies a receive function

to the FRAD to accept incoming packets.



With this initial offering, only 1 FRAD driver is available.  With many thanks

to Sangoma Technologies, David Mandelstam & Gene Kozin, the S502A, S502E &

S508 are supported.  This driver is currently set up for only FR, but as

Sangoma makes more firmware modules available, it can be updated to provide

them as well.



Configuration of the FRAD makes use of another net-tools program, 'fradcfg'.

This program makes use of a configuration file (which dlcicfg can also read)

to specify the types of boards to be configured as FRADs, as well as perform

any board specific configuration.  The Sangoma module of fradcfg loads the

FR firmware into the card, sets the irq/port/memory information, and provides

an initial configuration.



Additional FRAD device drivers can be added as hardware is available.



At this time, the dlcicfg and fradcfg programs have not been incorporated into

the net-tools distribution.  They can be found at ftp.invlogic.com, in

/pub/linux.  Note that with OS/2 FTPD, you end up in /pub by default, so just

use 'cd linux'.  v0.10 is for use on pre-2.0.3 and earlier, v0.15 is for

pre-2.0.4 and later.

MAINTAINERS

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@@ -6905,12 +6905,6 @@ S: Maintained 
W:	http://floatingpoint.sourceforge.net/emulator/index.html

F:	arch/x86/math-emu/













FRAME RELAY DLCI/FRAD (Sangoma drivers too)













L:	netdev@vger.kernel.org













S:	Orphan













F:	drivers/net/wan/dlci.c













F:	drivers/net/wan/sdla.c



























FRAMEBUFFER LAYER















M:	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>















L:	dri-devel@lists.freedesktop.org

































arch/arm/configs/ixp4xx_defconfig



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@@ -141,7 +141,6 @@ CONFIG_HDLC_CISCO=m













CONFIG_HDLC_FR=m















CONFIG_HDLC_PPP=m















CONFIG_HDLC_X25=m













CONFIG_DLCI=m















CONFIG_WAN_ROUTER_DRIVERS=m















CONFIG_ATM_TCP=m















# CONFIG_INPUT_KEYBOARD is not set

































arch/mips/configs/gpr_defconfig



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@@ -228,7 +228,6 @@ CONFIG_FARSYNC=m













CONFIG_DSCC4=m















CONFIG_DSCC4_PCISYNC=y















CONFIG_DSCC4_PCI_RST=y













CONFIG_DLCI=m















CONFIG_LAPBETHER=m















# CONFIG_INPUT_KEYBOARD is not set















# CONFIG_INPUT_MOUSE is not set









































































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