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 8db60bcf3021 ("[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 because the vendor no longer updated the in-kernel WANPIPE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: Xie He <xie.he.0141@gmail.com>
Link: https://lore.kernel.org/r/20201114150921.685594-1-xie.he.0141@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 0 insertions, 572 deletions

diff --git a/include/linux/if_frad.h b/include/linux/if_frad.h
deleted file mode 100644
index 52224de798aa..000000000000
--- a/include/linux/if_frad.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * DLCI/FRAD	Definitions for Frame Relay Access Devices.  DLCI devices are
- *		created for each DLCI associated with a FRAD.  The FRAD driver
- *		is not truly a network device, but the lower level device
- *		handler.  This allows other FRAD manufacturers to use the DLCI
- *		code, including its RFC1490 encapsulation alongside the current
- *		implementation for the Sangoma cards.
- *
- * Version:	@(#)if_ifrad.h	0.15	31 Mar 96
- *
- * Author:	Mike McLagan <mike.mclagan@linux.org>
- *
- * Changes:
- *		0.15	Mike McLagan	changed structure defs (packed)
- *					re-arranged flags
- *					added DLCI_RET vars
- */
-#ifndef _FRAD_H_
-#define _FRAD_H_
-
-#include <uapi/linux/if_frad.h>
-
-
-#if defined(CONFIG_DLCI) || defined(CONFIG_DLCI_MODULE)
-
-/* these are the fields of an RFC 1490 header */
-struct frhdr
-{
-   unsigned char  control;
-
-   /* for IP packets, this can be the NLPID */
-   unsigned char  pad;
-
-   unsigned char  NLPID;
-   unsigned char  OUI[3];
-   __be16 PID;
-
-#define IP_NLPID pad 
-} __packed;
-
-/* see RFC 1490 for the definition of the following */
-#define FRAD_I_UI		0x03
-
-#define FRAD_P_PADDING		0x00
-#define FRAD_P_Q933		0x08
-#define FRAD_P_SNAP		0x80
-#define FRAD_P_CLNP		0x81
-#define FRAD_P_IP		0xCC
-
-struct dlci_local
-{
-   struct net_device      *master;
-   struct net_device      *slave;
-   struct dlci_conf       config;
-   int                    configured;
-   struct list_head	  list;
-
-   /* callback function */
-   void              (*receive)(struct sk_buff *skb, struct net_device *);
-};
-
-struct frad_local
-{
-   /* devices which this FRAD is slaved to */
-   struct net_device     *master[CONFIG_DLCI_MAX];
-   short             dlci[CONFIG_DLCI_MAX];
-
-   struct frad_conf  config;
-   int               configured;	/* has this device been configured */
-   int               initialized;	/* mem_start, port, irq set ? */
-
-   /* callback functions */
-   int               (*activate)(struct net_device *, struct net_device *);
-   int               (*deactivate)(struct net_device *, struct net_device *);
-   int               (*assoc)(struct net_device *, struct net_device *);
-   int               (*deassoc)(struct net_device *, struct net_device *);
-   int               (*dlci_conf)(struct net_device *, struct net_device *, int get);
-
-   /* fields that are used by the Sangoma SDLA cards */
-   struct timer_list timer;
-   struct net_device *dev;
-   int               type;		/* adapter type */
-   int               state;		/* state of the S502/8 control latch */
-   int               buffer;		/* current buffer for S508 firmware */
-};
-
-#endif /* CONFIG_DLCI || CONFIG_DLCI_MODULE */
-
-extern void dlci_ioctl_set(int (*hook)(unsigned int, void __user *));
-
-#endif
diff --git a/include/linux/sdla.h b/include/linux/sdla.h
deleted file mode 100644
index 00e8b3b614f0..000000000000
--- a/include/linux/sdla.h
+++ /dev/null
@@ -1,240 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * INET		An implementation of the TCP/IP protocol suite for the LINUX
- *		operating system.  INET is implemented using the  BSD Socket
- *		interface as the means of communication with the user level.
- *
- *		Global definitions for the Frame relay interface.
- *
- * Version:	@(#)if_ifrad.h	0.20	13 Apr 96
- *
- * Author:	Mike McLagan <mike.mclagan@linux.org>
- *
- * Changes:
- *		0.15	Mike McLagan	Structure packing
- *
- *		0.20	Mike McLagan	New flags for S508 buffer handling
- */
-#ifndef SDLA_H
-#define SDLA_H
-
-#include <uapi/linux/sdla.h>
-
-
-/* important Z80 window addresses */
-#define SDLA_CONTROL_WND		0xE000
-
-#define SDLA_502_CMD_BUF		0xEF60
-#define SDLA_502_RCV_BUF		0xA900
-#define	SDLA_502_TXN_AVAIL		0xFFF1
-#define SDLA_502_RCV_AVAIL		0xFFF2
-#define SDLA_502_EVENT_FLAGS		0xFFF3
-#define SDLA_502_MDM_STATUS		0xFFF4
-#define SDLA_502_IRQ_INTERFACE		0xFFFD
-#define SDLA_502_IRQ_PERMISSION		0xFFFE
-#define SDLA_502_DATA_OFS		0x0010
-
-#define SDLA_508_CMD_BUF		0xE000
-#define SDLA_508_TXBUF_INFO		0xF100
-#define SDLA_508_RXBUF_INFO		0xF120
-#define SDLA_508_EVENT_FLAGS		0xF003
-#define SDLA_508_MDM_STATUS		0xF004
-#define SDLA_508_IRQ_INTERFACE		0xF010
-#define SDLA_508_IRQ_PERMISSION		0xF011
-#define SDLA_508_TSE_OFFSET		0xF012
-
-/* Event flags */
-#define SDLA_EVENT_STATUS		0x01
-#define SDLA_EVENT_DLCI_STATUS		0x02
-#define SDLA_EVENT_BAD_DLCI		0x04
-#define SDLA_EVENT_LINK_DOWN		0x40
-
-/* IRQ Trigger flags */
-#define SDLA_INTR_RX			0x01
-#define SDLA_INTR_TX			0x02
-#define SDLA_INTR_MODEM			0x04
-#define SDLA_INTR_COMPLETE		0x08
-#define SDLA_INTR_STATUS		0x10
-#define SDLA_INTR_TIMER			0x20
-
-/* DLCI status bits */
-#define SDLA_DLCI_DELETED		0x01
-#define SDLA_DLCI_ACTIVE		0x02
-#define SDLA_DLCI_WAITING		0x04
-#define SDLA_DLCI_NEW			0x08
-#define SDLA_DLCI_INCLUDED		0x40
-
-/* valid command codes */
-#define	SDLA_INFORMATION_WRITE		0x01
-#define	SDLA_INFORMATION_READ		0x02
-#define SDLA_ISSUE_IN_CHANNEL_SIGNAL	0x03
-#define	SDLA_SET_DLCI_CONFIGURATION	0x10
-#define	SDLA_READ_DLCI_CONFIGURATION	0x11
-#define	SDLA_DISABLE_COMMUNICATIONS	0x12
-#define	SDLA_ENABLE_COMMUNICATIONS	0x13
-#define	SDLA_READ_DLC_STATUS		0x14
-#define	SDLA_READ_DLC_STATISTICS	0x15
-#define	SDLA_FLUSH_DLC_STATISTICS	0x16
-#define	SDLA_LIST_ACTIVE_DLCI		0x17
-#define	SDLA_FLUSH_INFORMATION_BUFFERS	0x18
-#define	SDLA_ADD_DLCI			0x20
-#define	SDLA_DELETE_DLCI		0x21
-#define	SDLA_ACTIVATE_DLCI		0x22
-#define	SDLA_DEACTIVATE_DLCI		0x23
-#define	SDLA_READ_MODEM_STATUS		0x30
-#define	SDLA_SET_MODEM_STATUS		0x31
-#define	SDLA_READ_COMMS_ERR_STATS	0x32
-#define SDLA_FLUSH_COMMS_ERR_STATS	0x33
-#define	SDLA_READ_CODE_VERSION		0x40
-#define SDLA_SET_IRQ_TRIGGER		0x50
-#define SDLA_GET_IRQ_TRIGGER		0x51
-
-/* In channel signal types */
-#define SDLA_ICS_LINK_VERIFY		0x02
-#define SDLA_ICS_STATUS_ENQ		0x03
-
-/* modem status flags */
-#define SDLA_MODEM_DTR_HIGH		0x01
-#define SDLA_MODEM_RTS_HIGH		0x02
-#define SDLA_MODEM_DCD_HIGH		0x08
-#define SDLA_MODEM_CTS_HIGH		0x20
-
-/* used for RET_MODEM interpretation */
-#define SDLA_MODEM_DCD_LOW		0x01
-#define SDLA_MODEM_CTS_LOW		0x02
-
-/* return codes */
-#define SDLA_RET_OK			0x00
-#define SDLA_RET_COMMUNICATIONS		0x01
-#define SDLA_RET_CHANNEL_INACTIVE	0x02
-#define SDLA_RET_DLCI_INACTIVE		0x03
-#define SDLA_RET_DLCI_CONFIG		0x04
-#define SDLA_RET_BUF_TOO_BIG		0x05
-#define SDLA_RET_NO_DATA		0x05
-#define SDLA_RET_BUF_OVERSIZE		0x06
-#define SDLA_RET_CIR_OVERFLOW		0x07
-#define SDLA_RET_NO_BUFS		0x08
-#define SDLA_RET_TIMEOUT		0x0A
-#define SDLA_RET_MODEM			0x10
-#define SDLA_RET_CHANNEL_OFF		0x11
-#define SDLA_RET_CHANNEL_ON		0x12
-#define SDLA_RET_DLCI_STATUS		0x13
-#define SDLA_RET_DLCI_UNKNOWN       	0x14
-#define SDLA_RET_COMMAND_INVALID    	0x1F
-
-/* Configuration flags */
-#define SDLA_DIRECT_RECV		0x0080
-#define SDLA_TX_NO_EXCEPT		0x0020
-#define SDLA_NO_ICF_MSGS		0x1000
-#define SDLA_TX50_RX50			0x0000
-#define SDLA_TX70_RX30			0x2000
-#define SDLA_TX30_RX70			0x4000
-
-/* IRQ selection flags */
-#define SDLA_IRQ_RECEIVE		0x01
-#define SDLA_IRQ_TRANSMIT		0x02
-#define SDLA_IRQ_MODEM_STAT		0x04
-#define SDLA_IRQ_COMMAND		0x08
-#define SDLA_IRQ_CHANNEL		0x10
-#define SDLA_IRQ_TIMER			0x20
-
-/* definitions for PC memory mapping */
-#define SDLA_8K_WINDOW			0x01
-#define SDLA_S502_SEG_A			0x10
-#define SDLA_S502_SEG_C			0x20
-#define SDLA_S502_SEG_D			0x00
-#define SDLA_S502_SEG_E			0x30
-#define SDLA_S507_SEG_A			0x00
-#define SDLA_S507_SEG_B			0x40
-#define SDLA_S507_SEG_C			0x80
-#define SDLA_S507_SEG_E			0xC0
-#define SDLA_S508_SEG_A			0x00
-#define SDLA_S508_SEG_C			0x10
-#define SDLA_S508_SEG_D			0x08
-#define SDLA_S508_SEG_E			0x18
-
-/* SDLA adapter port constants */
-#define SDLA_IO_EXTENTS			0x04
-	
-#define SDLA_REG_CONTROL		0x00
-#define SDLA_REG_PC_WINDOW		0x01	/* offset for PC window select latch */
-#define SDLA_REG_Z80_WINDOW 		0x02	/* offset for Z80 window select latch */
-#define SDLA_REG_Z80_CONTROL		0x03	/* offset for Z80 control latch */
-	
-#define SDLA_S502_STS			0x00	/* status reg for 502, 502E, 507 */
-#define SDLA_S508_GNRL			0x00	/* general purp. reg for 508 */
-#define SDLA_S508_STS			0x01	/* status reg for 508 */
-#define SDLA_S508_IDR			0x02	/* ID reg for 508 */
-	
-/* control register flags */
-#define SDLA_S502A_START		0x00	/* start the CPU */
-#define SDLA_S502A_INTREQ		0x02
-#define SDLA_S502A_INTEN		0x04
-#define SDLA_S502A_HALT			0x08	/* halt the CPU */	
-#define SDLA_S502A_NMI			0x10	/* issue an NMI to the CPU */
-
-#define SDLA_S502E_CPUEN		0x01
-#define SDLA_S502E_ENABLE		0x02
-#define SDLA_S502E_INTACK		0x04
-	
-#define SDLA_S507_ENABLE		0x01
-#define SDLA_S507_IRQ3			0x00
-#define SDLA_S507_IRQ4			0x20
-#define SDLA_S507_IRQ5			0x40
-#define SDLA_S507_IRQ7			0x60
-#define SDLA_S507_IRQ10			0x80
-#define SDLA_S507_IRQ11			0xA0
-#define SDLA_S507_IRQ12			0xC0
-#define SDLA_S507_IRQ15			0xE0
-	
-#define SDLA_HALT			0x00
-#define SDLA_CPUEN			0x02
-#define SDLA_MEMEN			0x04
-#define SDLA_S507_EPROMWR		0x08
-#define SDLA_S507_EPROMCLK		0x10
-#define SDLA_S508_INTRQ			0x08
-#define SDLA_S508_INTEN			0x10
-
-struct sdla_cmd {
-   char  opp_flag;
-   char  cmd;
-   short length;
-   char  retval;
-   short dlci;
-   char  flags;
-   short rxlost_int;
-   long  rxlost_app;
-   char  reserve[2];
-   char  data[SDLA_MAX_DATA];	/* transfer data buffer */
-} __attribute__((packed));
-
-struct intr_info {
-   char  flags;
-   short txlen;
-   char  irq;
-   char  flags2;
-   short timeout;
-} __attribute__((packed));
-
-/* found in the 508's control window at RXBUF_INFO */
-struct buf_info {
-   unsigned short rse_num;
-   unsigned long  rse_base;
-   unsigned long  rse_next;
-   unsigned long  buf_base;
-   unsigned short reserved;
-   unsigned long  buf_top;
-} __attribute__((packed));
-
-/* structure pointed to by rse_base in RXBUF_INFO struct */
-struct buf_entry {
-   char  opp_flag;
-   short length;
-   short dlci;
-   char  flags;
-   short timestamp;
-   short reserved[2];
-   long  buf_addr;
-} __attribute__((packed));
-
-#endif
diff --git a/include/uapi/linux/if_frad.h b/include/uapi/linux/if_frad.h
deleted file mode 100644
index 3c6ee85f6262..000000000000
--- a/include/uapi/linux/if_frad.h
+++ /dev/null
@@ -1,123 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
-/*
- * DLCI/FRAD	Definitions for Frame Relay Access Devices.  DLCI devices are
- *		created for each DLCI associated with a FRAD.  The FRAD driver
- *		is not truly a network device, but the lower level device
- *		handler.  This allows other FRAD manufacturers to use the DLCI
- *		code, including its RFC1490 encapsulation alongside the current
- *		implementation for the Sangoma cards.
- *
- * Version:	@(#)if_ifrad.h	0.15	31 Mar 96
- *
- * Author:	Mike McLagan <mike.mclagan@linux.org>
- *
- * Changes:
- *		0.15	Mike McLagan	changed structure defs (packed)
- *					re-arranged flags
- *					added DLCI_RET vars
- *
- *		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.
- */
-
-#ifndef _UAPI_FRAD_H_
-#define _UAPI_FRAD_H_
-
-#include <linux/if.h>
-
-/* Structures and constants associated with the DLCI device driver */
-
-struct dlci_add
-{
-   char  devname[IFNAMSIZ];
-   short dlci;
-};
-
-#define DLCI_GET_CONF	(SIOCDEVPRIVATE + 2)
-#define DLCI_SET_CONF	(SIOCDEVPRIVATE + 3)
-
-/* 
- * These are related to the Sangoma SDLA and should remain in order. 
- * Code within the SDLA module is based on the specifics of this 
- * structure.  Change at your own peril.
- */
-struct dlci_conf {
-   short flags;
-   short CIR_fwd;
-   short Bc_fwd;
-   short Be_fwd;
-   short CIR_bwd;
-   short Bc_bwd;
-   short Be_bwd; 
-
-/* these are part of the status read */
-   short Tc_fwd;
-   short Tc_bwd;
-   short Tf_max;
-   short Tb_max;
-
-/* add any new fields here above is a mirror of sdla_dlci_conf */
-};
-
-#define DLCI_GET_SLAVE	(SIOCDEVPRIVATE + 4)
-
-/* configuration flags for DLCI */
-#define DLCI_IGNORE_CIR_OUT	0x0001
-#define DLCI_ACCOUNT_CIR_IN	0x0002
-#define DLCI_BUFFER_IF		0x0008
-
-#define DLCI_VALID_FLAGS	0x000B
-
-/* defines for the actual Frame Relay hardware */
-#define FRAD_GET_CONF	(SIOCDEVPRIVATE)
-#define FRAD_SET_CONF	(SIOCDEVPRIVATE + 1)
-
-#define FRAD_LAST_IOCTL	FRAD_SET_CONF
-
-/*
- * Based on the setup for the Sangoma SDLA.  If changes are 
- * necessary to this structure, a routine will need to be 
- * added to that module to copy fields.
- */
-struct frad_conf 
-{
-   short station;
-   short flags;
-   short kbaud;
-   short clocking;
-   short mtu;
-   short T391;
-   short T392;
-   short N391;
-   short N392;
-   short N393;
-   short CIR_fwd;
-   short Bc_fwd;
-   short Be_fwd;
-   short CIR_bwd;
-   short Bc_bwd;
-   short Be_bwd;
-
-/* Add new fields here, above is a mirror of the sdla_conf */
-
-};
-
-#define FRAD_STATION_CPE	0x0000
-#define FRAD_STATION_NODE	0x0001
-
-#define FRAD_TX_IGNORE_CIR	0x0001
-#define FRAD_RX_ACCOUNT_CIR	0x0002
-#define FRAD_DROP_ABORTED	0x0004
-#define FRAD_BUFFERIF		0x0008
-#define FRAD_STATS		0x0010
-#define FRAD_MCI		0x0100
-#define FRAD_AUTODLCI		0x8000
-#define FRAD_VALID_FLAGS	0x811F
-
-#define FRAD_CLOCK_INT		0x0001
-#define FRAD_CLOCK_EXT		0x0000
-
-
-#endif /* _UAPI_FRAD_H_ */
diff --git a/include/uapi/linux/sdla.h b/include/uapi/linux/sdla.h
deleted file mode 100644
index 1e3735be6511..000000000000
--- a/include/uapi/linux/sdla.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
-/*
- * INET		An implementation of the TCP/IP protocol suite for the LINUX
- *		operating system.  INET is implemented using the  BSD Socket
- *		interface as the means of communication with the user level.
- *
- *		Global definitions for the Frame relay interface.
- *
- * Version:	@(#)if_ifrad.h	0.20	13 Apr 96
- *
- * Author:	Mike McLagan <mike.mclagan@linux.org>
- *
- * Changes:
- *		0.15	Mike McLagan	Structure packing
- *
- *		0.20	Mike McLagan	New flags for S508 buffer handling
- *
- *		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.
- */
-
-#ifndef _UAPISDLA_H
-#define _UAPISDLA_H
-
-/* adapter type */
-#define SDLA_TYPES
-#define SDLA_S502A			5020
-#define SDLA_S502E			5021
-#define SDLA_S503			5030
-#define SDLA_S507			5070
-#define SDLA_S508			5080
-#define SDLA_S509			5090
-#define SDLA_UNKNOWN			-1
-
-/* port selection flags for the S508 */
-#define SDLA_S508_PORT_V35		0x00
-#define SDLA_S508_PORT_RS232		0x02
-
-/* Z80 CPU speeds */
-#define SDLA_CPU_3M			0x00
-#define SDLA_CPU_5M			0x01
-#define SDLA_CPU_7M			0x02
-#define SDLA_CPU_8M			0x03
-#define SDLA_CPU_10M			0x04
-#define SDLA_CPU_16M			0x05
-#define SDLA_CPU_12M			0x06
-
-/* some private IOCTLs */
-#define SDLA_IDENTIFY			(FRAD_LAST_IOCTL + 1)
-#define SDLA_CPUSPEED			(FRAD_LAST_IOCTL + 2)
-#define SDLA_PROTOCOL			(FRAD_LAST_IOCTL + 3)
-
-#define SDLA_CLEARMEM			(FRAD_LAST_IOCTL + 4)
-#define SDLA_WRITEMEM			(FRAD_LAST_IOCTL + 5)
-#define SDLA_READMEM			(FRAD_LAST_IOCTL + 6)
-
-struct sdla_mem {
-   int  addr;
-   int  len;
-   void __user *data;
-};
-
-#define SDLA_START			(FRAD_LAST_IOCTL + 7)
-#define SDLA_STOP			(FRAD_LAST_IOCTL + 8)
-
-/* some offsets in the Z80's memory space */
-#define SDLA_NMIADDR			0x0000
-#define SDLA_CONF_ADDR			0x0010
-#define SDLA_S502A_NMIADDR		0x0066
-#define SDLA_CODE_BASEADDR		0x0100
-#define SDLA_WINDOW_SIZE		0x2000
-#define SDLA_ADDR_MASK			0x1FFF
-
-/* largest handleable block of data */
-#define SDLA_MAX_DATA			4080
-#define SDLA_MAX_MTU			4072	/* MAX_DATA - sizeof(fradhdr) */
-#define SDLA_MAX_DLCI			24
-
-/* this should be the same as frad_conf */
-struct sdla_conf {
-   short station;
-   short config;
-   short kbaud;
-   short clocking;
-   short max_frm;
-   short T391;
-   short T392;
-   short N391;
-   short N392;
-   short N393;
-   short CIR_fwd;
-   short Bc_fwd;
-   short Be_fwd;
-   short CIR_bwd;
-   short Bc_bwd;
-   short Be_bwd;
-};
-
-/* this should be the same as dlci_conf */
-struct sdla_dlci_conf {
-   short config;
-   short CIR_fwd;
-   short Bc_fwd;
-   short Be_fwd;
-   short CIR_bwd;
-   short Bc_bwd;
-   short Be_bwd; 
-   short Tc_fwd;
-   short Tc_bwd;
-   short Tf_max;
-   short Tb_max;
-};
-
-
-#endif /* _UAPISDLA_H */