net: atm: remove support for ZeitNet ZN122x ATM devices

This driver received nothing but automated fixes in the last 15 years.
Since it's using virt_to_bus it's unlikely to be used on any modern
platform.

Signed-off-by: Jakub Kicinski <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

arch/mips/configs/gpr_defconfig

···
 CONFIG_ATM_TCP=m
 CONFIG_ATM_LANAI=m
 CONFIG_ATM_ENI=m
-CONFIG_ATM_ZATM=m
 CONFIG_ATM_NICSTAR=m
 CONFIG_ATM_IDT77252=m
 CONFIG_ATM_IA=m

arch/mips/configs/mtx1_defconfig

···
 CONFIG_ATM_TCP=m
 CONFIG_ATM_LANAI=m
 CONFIG_ATM_ENI=m
-CONFIG_ATM_ZATM=m
 CONFIG_ATM_NICSTAR=m
 CONFIG_ATM_IDT77252=m
 CONFIG_ATM_IA=m

drivers/atm/Kconfig

···
 	  try this if you have disabled 4W and 8W bursts. Enabling 2W if 4W or
 	  8W are also set may or may not improve throughput.
 
-config ATM_ZATM
-	tristate "ZeitNet ZN1221/ZN1225"
-	depends on PCI && VIRT_TO_BUS
-	help
-	  Driver for the ZeitNet ZN1221 (MMF) and ZN1225 (UTP-5) 155 Mbps ATM
-	  adapters.
-
-	  To compile this driver as a module, choose M here: the module will
-	  be called zatm.
-
-config ATM_ZATM_DEBUG
-	bool "Enable extended debugging"
-	depends on ATM_ZATM
-	help
-	  Extended debugging records various events and displays that list
-	  when an inconsistency is detected. This mechanism is faster than
-	  generally using printks, but still has some impact on performance.
-	  Note that extended debugging may create certain race conditions
-	  itself. Enable this ONLY if you suspect problems with the driver.
-
 config ATM_NICSTAR
 	tristate "IDT 77201 (NICStAR) (ForeRunnerLE)"
 	depends on PCI

drivers/atm/Makefile

···
 
 fore_200e-y	:= fore200e.o
 
-obj-$(CONFIG_ATM_ZATM)		+= zatm.o uPD98402.o
 obj-$(CONFIG_ATM_NICSTAR)	+= nicstar.o
 obj-$(CONFIG_ATM_IA)		+= iphase.o suni.o
 obj-$(CONFIG_ATM_FORE200E)	+= fore_200e.o

drivers/atm/uPD98401.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/* drivers/atm/uPD98401.h - NEC uPD98401 (SAR) declarations */
- 
-/* Written 1995 by Werner Almesberger, EPFL LRC */
- 
-
-#ifndef DRIVERS_ATM_uPD98401_H
-#define DRIVERS_ATM_uPD98401_H
-
-
-#define MAX_CRAM_SIZE	(1 << 18)	/* 2^18 words */
-#define RAM_INCREMENT	1024		/* check in 4 kB increments */
-
-#define uPD98401_PORTS	0x24		/* probably more ? */
-
-
-/*
- * Commands
- */
-
-#define uPD98401_OPEN_CHAN	0x20000000 /* open channel */
-#define uPD98401_CHAN_ADDR	0x0003fff8 /*	channel address */
-#define uPD98401_CHAN_ADDR_SHIFT 3
-#define uPD98401_CLOSE_CHAN	0x24000000 /* close channel */
-#define uPD98401_CHAN_RT	0x02000000 /*	RX/TX (0 TX, 1 RX) */
-#define uPD98401_DEACT_CHAN	0x28000000 /* deactivate channel */
-#define uPD98401_TX_READY	0x30000000 /* TX ready */
-#define uPD98401_ADD_BAT	0x34000000 /* add batches */
-#define uPD98401_POOL		0x000f0000 /* pool number */
-#define uPD98401_POOL_SHIFT	16
-#define uPD98401_POOL_NUMBAT	0x0000ffff /* number of batches */
-#define uPD98401_NOP		0x3f000000 /* NOP */
-#define uPD98401_IND_ACC	0x00000000 /* Indirect Access */
-#define uPD98401_IA_RW		0x10000000 /*	Read/Write (0 W, 1 R) */
-#define uPD98401_IA_B3		0x08000000 /*	Byte select, 1 enable */
-#define uPD98401_IA_B2		0x04000000
-#define uPD98401_IA_B1		0x02000000
-#define uPD98401_IA_B0		0x01000000
-#define uPD98401_IA_BALL	0x0f000000 /*   whole longword */
-#define uPD98401_IA_TGT		0x000c0000 /*	Target */
-#define uPD98401_IA_TGT_SHIFT	18
-#define uPD98401_IA_TGT_CM	0	   /*	- Control Memory */
-#define uPD98401_IA_TGT_SAR	1	   /*	- uPD98401 registers */
-#define uPD98401_IA_TGT_PHY	3	   /*   - PHY device */
-#define uPD98401_IA_ADDR	0x0003ffff
-
-/*
- * Command Register Status
- */
-
-#define uPD98401_BUSY		0x80000000 /* SAR is busy */
-#define uPD98401_LOCKED		0x40000000 /* SAR is locked by other CPU */
-
-/*
- * Indications
- */
-
-/* Normal (AAL5) Receive Indication */
-#define uPD98401_AAL5_UINFO	0xffff0000 /* user-supplied information */
-#define uPD98401_AAL5_UINFO_SHIFT 16
-#define uPD98401_AAL5_SIZE	0x0000ffff /* PDU size (in _CELLS_ !!) */
-#define uPD98401_AAL5_CHAN	0x7fff0000 /* Channel number */
-#define uPD98401_AAL5_CHAN_SHIFT	16
-#define uPD98401_AAL5_ERR	0x00008000 /* Error indication */
-#define uPD98401_AAL5_CI	0x00004000 /* Congestion Indication */
-#define uPD98401_AAL5_CLP	0x00002000 /* CLP (>= 1 cell had CLP=1) */
-#define uPD98401_AAL5_ES	0x00000f00 /* Error Status */
-#define uPD98401_AAL5_ES_SHIFT	8
-#define uPD98401_AAL5_ES_NONE	0	   /*	No error */
-#define uPD98401_AAL5_ES_FREE	1	   /*	Receiver free buf underflow */
-#define uPD98401_AAL5_ES_FIFO	2	   /*	Receiver FIFO overrun */
-#define uPD98401_AAL5_ES_TOOBIG	3	   /*	Maximum length violation */
-#define uPD98401_AAL5_ES_CRC	4	   /*	CRC error */
-#define uPD98401_AAL5_ES_ABORT	5	   /*	User abort */
-#define uPD98401_AAL5_ES_LENGTH	6	   /*   Length violation */
-#define uPD98401_AAL5_ES_T1	7	   /*	T1 error (timeout) */
-#define uPD98401_AAL5_ES_DEACT	8	   /*	Deactivated with DEACT_CHAN */
-#define uPD98401_AAL5_POOL	0x0000001f /* Free buffer pool number */
-
-/* Raw Cell Indication */
-#define uPD98401_RAW_UINFO	uPD98401_AAL5_UINFO
-#define uPD98401_RAW_UINFO_SHIFT uPD98401_AAL5_UINFO_SHIFT
-#define uPD98401_RAW_HEC	0x000000ff /* HEC */
-#define uPD98401_RAW_CHAN	uPD98401_AAL5_CHAN
-#define uPD98401_RAW_CHAN_SHIFT uPD98401_AAL5_CHAN_SHIFT
-
-/* Transmit Indication */
-#define uPD98401_TXI_CONN	0x7fff0000 /* Connection Number */
-#define uPD98401_TXI_CONN_SHIFT	16
-#define uPD98401_TXI_ACTIVE	0x00008000 /* Channel remains active */
-#define uPD98401_TXI_PQP	0x00007fff /* Packet Queue Pointer */
-
-/*
- * Directly Addressable Registers
- */
-
-#define uPD98401_GMR	0x00	/* General Mode Register */
-#define uPD98401_GSR	0x01	/* General Status Register */
-#define uPD98401_IMR	0x02	/* Interrupt Mask Register */
-#define uPD98401_RQU	0x03	/* Receive Queue Underrun */
-#define uPD98401_RQA	0x04	/* Receive Queue Alert */
-#define uPD98401_ADDR	0x05	/* Last Burst Address */
-#define uPD98401_VER	0x06	/* Version Number */
-#define uPD98401_SWR	0x07	/* Software Reset */
-#define uPD98401_CMR	0x08	/* Command Register */
-#define uPD98401_CMR_L	0x09	/* Command Register and Lock/Unlock */
-#define uPD98401_CER	0x0a	/* Command Extension Register */
-#define uPD98401_CER_L	0x0b	/* Command Ext Reg and Lock/Unlock */
-
-#define uPD98401_MSH(n) (0x10+(n))	/* Mailbox n Start Address High */
-#define uPD98401_MSL(n) (0x14+(n))	/* Mailbox n Start Address High */
-#define uPD98401_MBA(n) (0x18+(n))	/* Mailbox n Bottom Address */
-#define uPD98401_MTA(n) (0x1c+(n))	/* Mailbox n Tail Address */
-#define uPD98401_MWA(n) (0x20+(n))	/* Mailbox n Write Address */
-
-/* GMR is at 0x00 */
-#define uPD98401_GMR_ONE	0x80000000 /* Must be set to one */
-#define uPD98401_GMR_SLM	0x40000000 /* Address mode (0 word, 1 byte) */
-#define uPD98401_GMR_CPE	0x00008000 /* Control Memory Parity Enable */
-#define uPD98401_GMR_LP		0x00004000 /* Loopback */
-#define uPD98401_GMR_WA		0x00002000 /* Early Bus Write Abort/RDY */
-#define uPD98401_GMR_RA		0x00001000 /* Early Read Abort/RDY */
-#define uPD98401_GMR_SZ		0x00000f00 /* Burst Size Enable */
-#define uPD98401_BURST16	0x00000800 /*	16-word burst */
-#define uPD98401_BURST8		0x00000400 /*	 8-word burst */
-#define uPD98401_BURST4		0x00000200 /*	 4-word burst */
-#define uPD98401_BURST2		0x00000100 /*	 2-word burst */
-#define uPD98401_GMR_AD		0x00000080 /* Address (burst resolution) Disable */
-#define uPD98401_GMR_BO		0x00000040 /* Byte Order (0 little, 1 big) */
-#define uPD98401_GMR_PM		0x00000020 /* Bus Parity Mode (0 byte, 1 word)*/
-#define uPD98401_GMR_PC		0x00000010 /* Bus Parity Control (0even,1odd) */
-#define uPD98401_GMR_BPE	0x00000008 /* Bus Parity Enable */
-#define uPD98401_GMR_DR		0x00000004 /* Receive Drop Mode (0drop,1don't)*/
-#define uPD98401_GMR_SE		0x00000002 /* Shapers Enable */
-#define uPD98401_GMR_RE		0x00000001 /* Receiver Enable */
-
-/* GSR is at 0x01, IMR is at 0x02 */
-#define uPD98401_INT_PI		0x80000000 /* PHY interrupt */
-#define uPD98401_INT_RQA	0x40000000 /* Receive Queue Alert */
-#define uPD98401_INT_RQU	0x20000000 /* Receive Queue Underrun */
-#define uPD98401_INT_RD		0x10000000 /* Receiver Deactivated */
-#define uPD98401_INT_SPE	0x08000000 /* System Parity Error */
-#define uPD98401_INT_CPE	0x04000000 /* Control Memory Parity Error */
-#define uPD98401_INT_SBE	0x02000000 /* System Bus Error */
-#define uPD98401_INT_IND	0x01000000 /* Initialization Done */
-#define uPD98401_INT_RCR	0x0000ff00 /* Raw Cell Received */
-#define uPD98401_INT_RCR_SHIFT	8
-#define uPD98401_INT_MF		0x000000f0 /* Mailbox Full */
-#define uPD98401_INT_MF_SHIFT	4
-#define uPD98401_INT_MM		0x0000000f /* Mailbox Modified */
-
-/* VER is at 0x06 */
-#define uPD98401_MAJOR		0x0000ff00 /* Major revision */
-#define uPD98401_MAJOR_SHIFT	8
-#define uPD98401_MINOR		0x000000ff /* Minor revision */
-
-/*
- * Indirectly Addressable Registers
- */
-
-#define uPD98401_IM(n)	(0x40000+(n))	/* Scheduler n I and M */
-#define uPD98401_X(n)	(0x40010+(n))	/* Scheduler n X */
-#define uPD98401_Y(n)	(0x40020+(n))	/* Scheduler n Y */
-#define uPD98401_PC(n)	(0x40030+(n))	/* Scheduler n P, C, p and c */
-#define uPD98401_PS(n)	(0x40040+(n))	/* Scheduler n priority and status */
-
-/* IM contents */
-#define uPD98401_IM_I		0xff000000 /* I */
-#define uPD98401_IM_I_SHIFT	24
-#define uPD98401_IM_M		0x00ffffff /* M */
-
-/* PC contents */
-#define uPD98401_PC_P		0xff000000 /* P */
-#define uPD98401_PC_P_SHIFT	24
-#define uPD98401_PC_C		0x00ff0000 /* C */
-#define uPD98401_PC_C_SHIFT	16
-#define uPD98401_PC_p		0x0000ff00 /* p */
-#define uPD98401_PC_p_SHIFT	8
-#define uPD98401_PC_c		0x000000ff /* c */
-
-/* PS contents */
-#define uPD98401_PS_PRIO	0xf0	/* Priority level (0 high, 15 low) */
-#define uPD98401_PS_PRIO_SHIFT	4
-#define uPD98401_PS_S		0x08	/* Scan - must be 0 (internal) */
-#define uPD98401_PS_R		0x04	/* Round Robin (internal) */
-#define uPD98401_PS_A		0x02	/* Active (internal) */
-#define uPD98401_PS_E		0x01	/* Enabled */
-
-#define uPD98401_TOS	0x40100	/* Top of Stack Control Memory Address */
-#define uPD98401_SMA	0x40200	/* Shapers Control Memory Start Address */
-#define uPD98401_PMA	0x40201	/* Receive Pool Control Memory Start Address */
-#define uPD98401_T1R	0x40300	/* T1 Register */
-#define uPD98401_VRR	0x40301	/* VPI/VCI Reduction Register/Recv. Shutdown */
-#define uPD98401_TSR	0x40302	/* Time-Stamp Register */
-
-/* VRR is at 0x40301 */
-#define uPD98401_VRR_SDM	0x80000000 /* Shutdown Mode */
-#define uPD98401_VRR_SHIFT	0x000f0000 /* VPI/VCI Shift */
-#define uPD98401_VRR_SHIFT_SHIFT 16
-#define uPD98401_VRR_MASK	0x0000ffff /* VPI/VCI mask */
-
-/*
- * TX packet descriptor
- */
-
-#define uPD98401_TXPD_SIZE	16	   /* descriptor size (in bytes) */
-
-#define uPD98401_TXPD_V		0x80000000 /* Valid bit */
-#define uPD98401_TXPD_DP	0x40000000 /* Descriptor (1) or Pointer (0) */
-#define uPD98401_TXPD_SM	0x20000000 /* Single (1) or Multiple (0) */
-#define uPD98401_TXPD_CLPM	0x18000000 /* CLP mode */
-#define uPD98401_CLPM_0		0	   /*	00 CLP = 0 */
-#define uPD98401_CLPM_1		3	   /*	11 CLP = 1 */
-#define uPD98401_CLPM_LAST	1	   /*	01 CLP unless last cell */
-#define uPD98401_TXPD_CLPM_SHIFT 27
-#define uPD98401_TXPD_PTI	0x07000000 /* PTI pattern */
-#define uPD98401_TXPD_PTI_SHIFT	24
-#define uPD98401_TXPD_GFC	0x00f00000 /* GFC pattern */
-#define uPD98401_TXPD_GFC_SHIFT	20
-#define uPD98401_TXPD_C10	0x00040000 /* insert CRC-10 */
-#define uPD98401_TXPD_AAL5	0x00020000 /* AAL5 processing */
-#define uPD98401_TXPD_MB	0x00010000 /* TX mailbox number */
-#define uPD98401_TXPD_UU	0x0000ff00 /* CPCS-UU */
-#define uPD98401_TXPD_UU_SHIFT	8
-#define uPD98401_TXPD_CPI	0x000000ff /* CPI */
-
-/*
- * TX buffer descriptor
- */
-
-#define uPD98401_TXBD_SIZE	8	   /* descriptor size (in bytes) */
-
-#define uPD98401_TXBD_LAST	0x80000000 /* last buffer in packet */
-
-/*
- * TX VC table
- */
-
-/* 1st word has the same structure as in a TX packet descriptor */
-#define uPD98401_TXVC_L		0x80000000 /* last buffer */
-#define uPD98401_TXVC_SHP	0x0f000000 /* shaper number */
-#define uPD98401_TXVC_SHP_SHIFT	24
-#define uPD98401_TXVC_VPI	0x00ff0000 /* VPI */
-#define uPD98401_TXVC_VPI_SHIFT	16
-#define uPD98401_TXVC_VCI	0x0000ffff /* VCI */
-#define uPD98401_TXVC_QRP	6	   /* Queue Read Pointer is in word 6 */
-
-/*
- * RX free buffer pools descriptor
- */
-
-#define uPD98401_RXFP_ALERT	0x70000000 /* low water mark */
-#define uPD98401_RXFP_ALERT_SHIFT 28
-#define uPD98401_RXFP_BFSZ	0x0f000000 /* buffer size, 64*2^n */
-#define uPD98401_RXFP_BFSZ_SHIFT 24
-#define uPD98401_RXFP_BTSZ	0x00ff0000 /* batch size, n+1 */
-#define uPD98401_RXFP_BTSZ_SHIFT 16
-#define uPD98401_RXFP_REMAIN	0x0000ffff /* remaining batches in pool */
-
-/*
- * RX VC table
- */
-
-#define uPD98401_RXVC_BTSZ	0xff000000 /* remaining free buffers in batch */
-#define uPD98401_RXVC_BTSZ_SHIFT 24
-#define uPD98401_RXVC_MB	0x00200000 /* RX mailbox number */
-#define uPD98401_RXVC_POOL	0x001f0000 /* free buffer pool number */
-#define uPD98401_RXVC_POOL_SHIFT 16
-#define uPD98401_RXVC_UINFO	0x0000ffff /* user-supplied information */
-#define uPD98401_RXVC_T1	0xffff0000 /* T1 timestamp */
-#define uPD98401_RXVC_T1_SHIFT	16
-#define uPD98401_RXVC_PR	0x00008000 /* Packet Reception, 1 if busy */
-#define uPD98401_RXVC_DR	0x00004000 /* FIFO Drop */
-#define uPD98401_RXVC_OD	0x00001000 /* Drop OAM cells */
-#define uPD98401_RXVC_AR	0x00000800 /* AAL5 or raw cell; 1 if AAL5 */
-#define uPD98401_RXVC_MAXSEG	0x000007ff /* max number of segments per PDU */
-#define uPD98401_RXVC_REM	0xfffe0000 /* remaining words in curr buffer */
-#define uPD98401_RXVC_REM_SHIFT	17
-#define uPD98401_RXVC_CLP	0x00010000 /* CLP received */
-#define uPD98401_RXVC_BFA	0x00008000 /* Buffer Assigned */
-#define uPD98401_RXVC_BTA	0x00004000 /* Batch Assigned */
-#define uPD98401_RXVC_CI	0x00002000 /* Congestion Indication */
-#define uPD98401_RXVC_DD	0x00001000 /* Dropping incoming cells */
-#define uPD98401_RXVC_DP	0x00000800 /* like PR ? */
-#define uPD98401_RXVC_CURSEG	0x000007ff /* Current Segment count */
-
-/*
- * RX lookup table
- */
-
-#define uPD98401_RXLT_ENBL	0x8000	   /* Enable */
-
-#endif

drivers/atm/uPD98402.c

···
-// SPDX-License-Identifier: GPL-2.0-only
-/* drivers/atm/uPD98402.c - NEC uPD98402 (PHY) declarations */
- 
-/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
- 
-
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/atmdev.h>
-#include <linux/sonet.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/atomic.h>
-
-#include "uPD98402.h"
-
-
-#if 0
-#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
-#else
-#define DPRINTK(format,args...)
-#endif
-
-
-struct uPD98402_priv {
-	struct k_sonet_stats sonet_stats;/* link diagnostics */
-	unsigned char framing;		/* SONET/SDH framing */
-	int loop_mode;			/* loopback mode */
-	spinlock_t lock;
-};
-
-
-#define PRIV(dev) ((struct uPD98402_priv *) dev->phy_data)
-
-#define PUT(val,reg) dev->ops->phy_put(dev,val,uPD98402_##reg)
-#define GET(reg) dev->ops->phy_get(dev,uPD98402_##reg)
-
-
-static int fetch_stats(struct atm_dev *dev,struct sonet_stats __user *arg,int zero)
-{
-	struct sonet_stats tmp;
- 	int error = 0;
-
-	atomic_add(GET(HECCT),&PRIV(dev)->sonet_stats.uncorr_hcs);
-	sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
-	if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
-	if (zero && !error) {
-		/* unused fields are reported as -1, but we must not "adjust"
-		   them */
-		tmp.corr_hcs = tmp.tx_cells = tmp.rx_cells = 0;
-		sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
-	}
-	return error ? -EFAULT : 0;
-}
-
-
-static int set_framing(struct atm_dev *dev,unsigned char framing)
-{
-	static const unsigned char sonet[] = { 1,2,3,0 };
-	static const unsigned char sdh[] = { 1,0,0,2 };
-	const char *set;
-	unsigned long flags;
- 
-	switch (framing) {
-		case SONET_FRAME_SONET:
-			set = sonet;
-			break;
-		case SONET_FRAME_SDH:
-			set = sdh;
-			break;
-		default:
-			return -EINVAL;
-	}
-	spin_lock_irqsave(&PRIV(dev)->lock, flags);
-	PUT(set[0],C11T);
-	PUT(set[1],C12T);
-	PUT(set[2],C13T);
-	PUT((GET(MDR) & ~uPD98402_MDR_SS_MASK) | (set[3] <<
-	    uPD98402_MDR_SS_SHIFT),MDR);
-	spin_unlock_irqrestore(&PRIV(dev)->lock, flags);
-	return 0;
-}
-
-
-static int get_sense(struct atm_dev *dev,u8 __user *arg)
-{
-	unsigned long flags;
-	unsigned char s[3];
-
-	spin_lock_irqsave(&PRIV(dev)->lock, flags);
-	s[0] = GET(C11R);
-	s[1] = GET(C12R);
-	s[2] = GET(C13R);
-	spin_unlock_irqrestore(&PRIV(dev)->lock, flags);
-	return (put_user(s[0], arg) || put_user(s[1], arg+1) ||
-	    put_user(s[2], arg+2) || put_user(0xff, arg+3) ||
-	    put_user(0xff, arg+4) || put_user(0xff, arg+5)) ? -EFAULT : 0;
-}
-
-
-static int set_loopback(struct atm_dev *dev,int mode)
-{
-	unsigned char mode_reg;
-
-	mode_reg = GET(MDR) & ~(uPD98402_MDR_TPLP | uPD98402_MDR_ALP |
-	    uPD98402_MDR_RPLP);
-	switch (__ATM_LM_XTLOC(mode)) {
-		case __ATM_LM_NONE:
-			break;
-		case __ATM_LM_PHY:
-			mode_reg |= uPD98402_MDR_TPLP;
-			break;
-		case __ATM_LM_ATM:
-			mode_reg |= uPD98402_MDR_ALP;
-			break;
-		default:
-			return -EINVAL;
-	}
-	switch (__ATM_LM_XTRMT(mode)) {
-		case __ATM_LM_NONE:
-			break;
-		case __ATM_LM_PHY:
-			mode_reg |= uPD98402_MDR_RPLP;
-			break;
-		default:
-			return -EINVAL;
-	}
-	PUT(mode_reg,MDR);
-	PRIV(dev)->loop_mode = mode;
-	return 0;
-}
-
-
-static int uPD98402_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
-{
-	switch (cmd) {
-
-		case SONET_GETSTATZ:
-                case SONET_GETSTAT:
-			return fetch_stats(dev,arg, cmd == SONET_GETSTATZ);
-		case SONET_SETFRAMING:
-			return set_framing(dev, (int)(unsigned long)arg);
-		case SONET_GETFRAMING:
-			return put_user(PRIV(dev)->framing,(int __user *)arg) ?
-			    -EFAULT : 0;
-		case SONET_GETFRSENSE:
-			return get_sense(dev,arg);
-		case ATM_SETLOOP:
-			return set_loopback(dev, (int)(unsigned long)arg);
-		case ATM_GETLOOP:
-			return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
-			    -EFAULT : 0;
-		case ATM_QUERYLOOP:
-			return put_user(ATM_LM_LOC_PHY | ATM_LM_LOC_ATM |
-			    ATM_LM_RMT_PHY,(int __user *)arg) ? -EFAULT : 0;
-		default:
-			return -ENOIOCTLCMD;
-	}
-}
-
-
-#define ADD_LIMITED(s,v) \
-    { atomic_add(GET(v),&PRIV(dev)->sonet_stats.s); \
-    if (atomic_read(&PRIV(dev)->sonet_stats.s) < 0) \
-	atomic_set(&PRIV(dev)->sonet_stats.s,INT_MAX); }
-
-
-static void stat_event(struct atm_dev *dev)
-{
-	unsigned char events;
-
-	events = GET(PCR);
-	if (events & uPD98402_PFM_PFEB) ADD_LIMITED(path_febe,PFECB);
-	if (events & uPD98402_PFM_LFEB) ADD_LIMITED(line_febe,LECCT);
-	if (events & uPD98402_PFM_B3E) ADD_LIMITED(path_bip,B3ECT);
-	if (events & uPD98402_PFM_B2E) ADD_LIMITED(line_bip,B2ECT);
-	if (events & uPD98402_PFM_B1E) ADD_LIMITED(section_bip,B1ECT);
-}
-
-
-#undef ADD_LIMITED
-
-
-static void uPD98402_int(struct atm_dev *dev)
-{
-	static unsigned long silence = 0;
-	unsigned char reason;
-
-	while ((reason = GET(PICR))) {
-		if (reason & uPD98402_INT_LOS)
-			printk(KERN_NOTICE "%s(itf %d): signal lost\n",
-			    dev->type,dev->number);
-		if (reason & uPD98402_INT_PFM) stat_event(dev);
-		if (reason & uPD98402_INT_PCO) {
-			(void) GET(PCOCR); /* clear interrupt cause */
-			atomic_add(GET(HECCT),
-			    &PRIV(dev)->sonet_stats.uncorr_hcs);
-		}
-		if ((reason & uPD98402_INT_RFO) && 
-		    (time_after(jiffies, silence) || silence == 0)) {
-			printk(KERN_WARNING "%s(itf %d): uPD98402 receive "
-			    "FIFO overflow\n",dev->type,dev->number);
-			silence = (jiffies+HZ/2)|1;
-		}
-	}
-}
-
-
-static int uPD98402_start(struct atm_dev *dev)
-{
-	DPRINTK("phy_start\n");
-	if (!(dev->phy_data = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL)))
-		return -ENOMEM;
-	spin_lock_init(&PRIV(dev)->lock);
-	memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
-	(void) GET(PCR); /* clear performance events */
-	PUT(uPD98402_PFM_FJ,PCMR); /* ignore frequency adj */
-	(void) GET(PCOCR); /* clear overflows */
-	PUT(~uPD98402_PCO_HECC,PCOMR);
-	(void) GET(PICR); /* clear interrupts */
-	PUT(~(uPD98402_INT_PFM | uPD98402_INT_ALM | uPD98402_INT_RFO |
-	  uPD98402_INT_LOS),PIMR); /* enable them */
-	(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
-	atomic_set(&PRIV(dev)->sonet_stats.corr_hcs,-1);
-	atomic_set(&PRIV(dev)->sonet_stats.tx_cells,-1);
-	atomic_set(&PRIV(dev)->sonet_stats.rx_cells,-1);
-	return 0;
-}
-
-
-static int uPD98402_stop(struct atm_dev *dev)
-{
-	/* let SAR driver worry about stopping interrupts */
-	kfree(PRIV(dev));
-	return 0;
-}
-
-
-static const struct atmphy_ops uPD98402_ops = {
-	.start		= uPD98402_start,
-	.ioctl		= uPD98402_ioctl,
-	.interrupt	= uPD98402_int,
-	.stop		= uPD98402_stop,
-};
-
-
-int uPD98402_init(struct atm_dev *dev)
-{
-DPRINTK("phy_init\n");
-	dev->phy = &uPD98402_ops;
-	return 0;
-}
-
-
-MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(uPD98402_init);
-
-static __init int uPD98402_module_init(void)
-{
-	return 0;
-}
-module_init(uPD98402_module_init);
-/* module_exit not defined so not unloadable */

drivers/atm/uPD98402.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/* drivers/atm/uPD98402.h - NEC uPD98402 (PHY) declarations */
- 
-/* Written 1995 by Werner Almesberger, EPFL LRC */
-
-
-#ifndef DRIVERS_ATM_uPD98402_H
-#define DRIVERS_ATM_uPD98402_H
-
-/*
- * Registers
- */
-
-#define uPD98402_CMR		0x00	/* Command Register */
-#define uPD98402_MDR		0x01	/* Mode Register */
-#define uPD98402_PICR		0x02	/* PHY Interrupt Cause Register */
-#define uPD98402_PIMR		0x03	/* PHY Interrupt Mask Register */
-#define uPD98402_ACR		0x04	/* Alarm Cause Register */
-#define uPD98402_ACMR		0x05	/* Alarm Cause Mask Register */
-#define uPD98402_PCR		0x06	/* Performance Cause Register */
-#define uPD98402_PCMR		0x07	/* Performance Cause Mask Register */
-#define uPD98402_IACM		0x08	/* Internal Alarm Cause Mask Register */
-#define uPD98402_B1ECT		0x09	/* B1 Error Count Register */
-#define uPD98402_B2ECT		0x0a	/* B2 Error Count Register */
-#define uPD98402_B3ECT		0x0b	/* B3 Error Count Regster */
-#define uPD98402_PFECB		0x0c	/* Path FEBE Count Register */
-#define uPD98402_LECCT		0x0d	/* Line FEBE Count Register */
-#define uPD98402_HECCT		0x0e	/* HEC Error Count Register */
-#define uPD98402_FJCT		0x0f	/* Frequence Justification Count Reg */
-#define uPD98402_PCOCR		0x10	/* Perf. Counter Overflow Cause Reg */
-#define uPD98402_PCOMR		0x11	/* Perf. Counter Overflow Mask Reg */
-#define uPD98402_C11T		0x20	/* C11T Data Register */
-#define uPD98402_C12T		0x21	/* C12T Data Register */
-#define uPD98402_C13T		0x22	/* C13T Data Register */
-#define uPD98402_F1T		0x23	/* F1T Data Register */
-#define uPD98402_K2T		0x25	/* K2T Data Register */
-#define uPD98402_C2T		0x26	/* C2T Data Register */
-#define uPD98402_F2T		0x27	/* F2T Data Register */
-#define uPD98402_C11R		0x30	/* C11T Data Register */
-#define uPD98402_C12R		0x31	/* C12T Data Register */
-#define uPD98402_C13R		0x32	/* C13T Data Register */
-#define uPD98402_F1R		0x33	/* F1T Data Register */
-#define uPD98402_K2R		0x35	/* K2T Data Register */
-#define uPD98402_C2R		0x36	/* C2T Data Register */
-#define uPD98402_F2R		0x37	/* F2T Data Register */
-
-/* CMR is at 0x00 */
-#define uPD98402_CMR_PFRF	0x01	/* Send path FERF */
-#define uPD98402_CMR_LFRF	0x02	/* Send line FERF */
-#define uPD98402_CMR_PAIS	0x04	/* Send path AIS */
-#define uPD98402_CMR_LAIS	0x08	/* Send line AIS */
-
-/* MDR is at 0x01 */
-#define uPD98402_MDR_ALP	0x01	/* ATM layer loopback */
-#define uPD98402_MDR_TPLP	0x02	/* PMD loopback, to host */
-#define uPD98402_MDR_RPLP	0x04	/* PMD loopback, to network */
-#define uPD98402_MDR_SS0	0x08	/* SS0 */
-#define uPD98402_MDR_SS1	0x10	/* SS1 */
-#define uPD98402_MDR_SS_MASK	0x18	/* mask */
-#define uPD98402_MDR_SS_SHIFT	3	/* shift */
-#define uPD98402_MDR_HEC	0x20	/* disable HEC inbound processing */
-#define uPD98402_MDR_FSR	0x40	/* disable frame scrambler */
-#define uPD98402_MDR_CSR	0x80	/* disable cell scrambler */
-
-/* PICR is at 0x02, PIMR is at 0x03 */
-#define uPD98402_INT_PFM	0x01	/* performance counter has changed */
-#define uPD98402_INT_ALM	0x02	/* line fault */
-#define uPD98402_INT_RFO	0x04	/* receive FIFO overflow */
-#define uPD98402_INT_PCO	0x08	/* performance counter overflow */
-#define uPD98402_INT_OTD	0x20	/* OTD has occurred */
-#define uPD98402_INT_LOS	0x40	/* Loss Of Signal */
-#define uPD98402_INT_LOF	0x80	/* Loss Of Frame */
-
-/* ACR is as 0x04, ACMR is at 0x05 */
-#define uPD98402_ALM_PFRF	0x01	/* path FERF */
-#define uPD98402_ALM_LFRF	0x02	/* line FERF */
-#define uPD98402_ALM_PAIS	0x04	/* path AIS */
-#define uPD98402_ALM_LAIS	0x08	/* line AIS */
-#define uPD98402_ALM_LOD	0x10	/* loss of delineation */
-#define uPD98402_ALM_LOP	0x20	/* loss of pointer */
-#define uPD98402_ALM_OOF	0x40	/* out of frame */
-
-/* PCR is at 0x06, PCMR is at 0x07 */
-#define uPD98402_PFM_PFEB	0x01	/* path FEBE */
-#define uPD98402_PFM_LFEB	0x02	/* line FEBE */
-#define uPD98402_PFM_B3E	0x04	/* B3 error */
-#define uPD98402_PFM_B2E	0x08	/* B2 error */
-#define uPD98402_PFM_B1E	0x10	/* B1 error */
-#define uPD98402_PFM_FJ		0x20	/* frequency justification */
-
-/* IACM is at 0x08 */
-#define uPD98402_IACM_PFRF	0x01	/* don't generate path FERF */
-#define uPD98402_IACM_LFRF	0x02	/* don't generate line FERF */
-
-/* PCOCR is at 0x010, PCOMR is at 0x11 */
-#define uPD98402_PCO_B1EC	0x01	/* B1ECT overflow */
-#define uPD98402_PCO_B2EC	0x02	/* B2ECT overflow */
-#define uPD98402_PCO_B3EC	0x04	/* B3ECT overflow */
-#define uPD98402_PCO_PFBC	0x08	/* PFEBC overflow */
-#define uPD98402_PCO_LFBC	0x10	/* LFEVC overflow */
-#define uPD98402_PCO_HECC	0x20	/* HECCT overflow */
-#define uPD98402_PCO_FJC	0x40	/* FJCT overflow */
-
-
-int uPD98402_init(struct atm_dev *dev);
-
-#endif

drivers/atm/zatm.c

···
-// SPDX-License-Identifier: GPL-2.0-only
-/* drivers/atm/zatm.c - ZeitNet ZN122x device driver */
- 
-/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
-
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/pci.h>
-#include <linux/errno.h>
-#include <linux/atm.h>
-#include <linux/atmdev.h>
-#include <linux/sonet.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/delay.h>
-#include <linux/uio.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/atm_zatm.h>
-#include <linux/capability.h>
-#include <linux/bitops.h>
-#include <linux/wait.h>
-#include <linux/slab.h>
-#include <asm/byteorder.h>
-#include <asm/string.h>
-#include <asm/io.h>
-#include <linux/atomic.h>
-#include <linux/uaccess.h>
-#include <linux/nospec.h>
-
-#include "uPD98401.h"
-#include "uPD98402.h"
-#include "zeprom.h"
-#include "zatm.h"
-
-
-/*
- * TODO:
- *
- * Minor features
- *  - support 64 kB SDUs (will have to use multibuffer batches then :-( )
- *  - proper use of CDV, credit = max(1,CDVT*PCR)
- *  - AAL0
- *  - better receive timestamps
- *  - OAM
- */
-
-#define ZATM_COPPER	1
-
-#if 0
-#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
-#else
-#define DPRINTK(format,args...)
-#endif
-
-#ifndef CONFIG_ATM_ZATM_DEBUG
-
-
-#define NULLCHECK(x)
-
-#define EVENT(s,a,b)
-
-
-static void event_dump(void)
-{
-}
-
-
-#else
-
-
-/* 
- * NULL pointer checking
- */
-
-#define NULLCHECK(x) \
-  if ((unsigned long) (x) < 0x30) printk(KERN_CRIT #x "==0x%x\n", (int) (x))
-
-/*
- * Very extensive activity logging. Greatly improves bug detection speed but
- * costs a few Mbps if enabled.
- */
-
-#define EV 64
-
-static const char *ev[EV];
-static unsigned long ev_a[EV],ev_b[EV];
-static int ec = 0;
-
-
-static void EVENT(const char *s,unsigned long a,unsigned long b)
-{
-	ev[ec] = s; 
-	ev_a[ec] = a;
-	ev_b[ec] = b;
-	ec = (ec+1) % EV;
-}
-
-
-static void event_dump(void)
-{
-	int n,i;
-
-	printk(KERN_NOTICE "----- event dump follows -----\n");
-	for (n = 0; n < EV; n++) {
-		i = (ec+n) % EV;
-		printk(KERN_NOTICE);
-		printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
-	}
-	printk(KERN_NOTICE "----- event dump ends here -----\n");
-}
-
-
-#endif /* CONFIG_ATM_ZATM_DEBUG */
-
-
-#define RING_BUSY	1	/* indication from do_tx that PDU has to be
-				   backlogged */
-
-static struct atm_dev *zatm_boards = NULL;
-static unsigned long dummy[2] = {0,0};
-
-
-#define zin_n(r) inl(zatm_dev->base+r*4)
-#define zin(r) inl(zatm_dev->base+uPD98401_##r*4)
-#define zout(v,r) outl(v,zatm_dev->base+uPD98401_##r*4)
-#define zwait() do {} while (zin(CMR) & uPD98401_BUSY)
-
-/* RX0, RX1, TX0, TX1 */
-static const int mbx_entries[NR_MBX] = { 1024,1024,1024,1024 };
-static const int mbx_esize[NR_MBX] = { 16,16,4,4 }; /* entry size in bytes */
-
-#define MBX_SIZE(i) (mbx_entries[i]*mbx_esize[i])
-
-
-/*-------------------------------- utilities --------------------------------*/
-
-
-static void zpokel(struct zatm_dev *zatm_dev,u32 value,u32 addr)
-{
-	zwait();
-	zout(value,CER);
-	zout(uPD98401_IND_ACC | uPD98401_IA_BALL |
-	    (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
-}
-
-
-static u32 zpeekl(struct zatm_dev *zatm_dev,u32 addr)
-{
-	zwait();
-	zout(uPD98401_IND_ACC | uPD98401_IA_BALL | uPD98401_IA_RW |
-	  (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
-	zwait();
-	return zin(CER);
-}
-
-
-/*------------------------------- free lists --------------------------------*/
-
-
-/*
- * Free buffer head structure:
- *   [0] pointer to buffer (for SAR)
- *   [1] buffer descr link pointer (for SAR)
- *   [2] back pointer to skb (for poll_rx)
- *   [3] data
- *   ...
- */
-
-struct rx_buffer_head {
-	u32		buffer;	/* pointer to buffer (for SAR) */
-	u32		link;	/* buffer descriptor link pointer (for SAR) */
-	struct sk_buff	*skb;	/* back pointer to skb (for poll_rx) */
-};
-
-
-static void refill_pool(struct atm_dev *dev,int pool)
-{
-	struct zatm_dev *zatm_dev;
-	struct sk_buff *skb;
-	struct rx_buffer_head *first;
-	unsigned long flags;
-	int align,offset,free,count,size;
-
-	EVENT("refill_pool\n",0,0);
-	zatm_dev = ZATM_DEV(dev);
-	size = (64 << (pool <= ZATM_AAL5_POOL_BASE ? 0 :
-	    pool-ZATM_AAL5_POOL_BASE))+sizeof(struct rx_buffer_head);
-	if (size < PAGE_SIZE) {
-		align = 32; /* for 32 byte alignment */
-		offset = sizeof(struct rx_buffer_head);
-	}
-	else {
-		align = 4096;
-		offset = zatm_dev->pool_info[pool].offset+
-		    sizeof(struct rx_buffer_head);
-	}
-	size += align;
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	free = zpeekl(zatm_dev,zatm_dev->pool_base+2*pool) &
-	    uPD98401_RXFP_REMAIN;
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	if (free >= zatm_dev->pool_info[pool].low_water) return;
-	EVENT("starting ... POOL: 0x%x, 0x%x\n",
-	    zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
-	    zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
-	EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
-	count = 0;
-	first = NULL;
-	while (free < zatm_dev->pool_info[pool].high_water) {
-		struct rx_buffer_head *head;
-
-		skb = alloc_skb(size,GFP_ATOMIC);
-		if (!skb) {
-			printk(KERN_WARNING DEV_LABEL "(Itf %d): got no new "
-			    "skb (%d) with %d free\n",dev->number,size,free);
-			break;
-		}
-		skb_reserve(skb,(unsigned char *) ((((unsigned long) skb->data+
-		    align+offset-1) & ~(unsigned long) (align-1))-offset)-
-		    skb->data);
-		head = (struct rx_buffer_head *) skb->data;
-		skb_reserve(skb,sizeof(struct rx_buffer_head));
-		if (!first) first = head;
-		count++;
-		head->buffer = virt_to_bus(skb->data);
-		head->link = 0;
-		head->skb = skb;
-		EVENT("enq skb 0x%08lx/0x%08lx\n",(unsigned long) skb,
-		    (unsigned long) head);
-		spin_lock_irqsave(&zatm_dev->lock, flags);
-		if (zatm_dev->last_free[pool])
-			((struct rx_buffer_head *) (zatm_dev->last_free[pool]->
-			    data))[-1].link = virt_to_bus(head);
-		zatm_dev->last_free[pool] = skb;
-		skb_queue_tail(&zatm_dev->pool[pool],skb);
-		spin_unlock_irqrestore(&zatm_dev->lock, flags);
-		free++;
-	}
-	if (first) {
-		spin_lock_irqsave(&zatm_dev->lock, flags);
-		zwait();
-		zout(virt_to_bus(first),CER);
-		zout(uPD98401_ADD_BAT | (pool << uPD98401_POOL_SHIFT) | count,
-		    CMR);
-		spin_unlock_irqrestore(&zatm_dev->lock, flags);
-		EVENT ("POOL: 0x%x, 0x%x\n",
-		    zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
-		    zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
-		EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
-	}
-}
-
-
-static void drain_free(struct atm_dev *dev,int pool)
-{
-	skb_queue_purge(&ZATM_DEV(dev)->pool[pool]);
-}
-
-
-static int pool_index(int max_pdu)
-{
-	int i;
-
-	if (max_pdu % ATM_CELL_PAYLOAD)
-		printk(KERN_ERR DEV_LABEL ": driver error in pool_index: "
-		    "max_pdu is %d\n",max_pdu);
-	if (max_pdu > 65536) return -1;
-	for (i = 0; (64 << i) < max_pdu; i++);
-	return i+ZATM_AAL5_POOL_BASE;
-}
-
-
-/* use_pool isn't reentrant */
-
-
-static void use_pool(struct atm_dev *dev,int pool)
-{
-	struct zatm_dev *zatm_dev;
-	unsigned long flags;
-	int size;
-
-	zatm_dev = ZATM_DEV(dev);
-	if (!(zatm_dev->pool_info[pool].ref_count++)) {
-		skb_queue_head_init(&zatm_dev->pool[pool]);
-		size = pool-ZATM_AAL5_POOL_BASE;
-		if (size < 0) size = 0; /* 64B... */
-		else if (size > 10) size = 10; /* ... 64kB */
-		spin_lock_irqsave(&zatm_dev->lock, flags);
-		zpokel(zatm_dev,((zatm_dev->pool_info[pool].low_water/4) <<
-		    uPD98401_RXFP_ALERT_SHIFT) |
-		    (1 << uPD98401_RXFP_BTSZ_SHIFT) |
-		    (size << uPD98401_RXFP_BFSZ_SHIFT),
-		    zatm_dev->pool_base+pool*2);
-		zpokel(zatm_dev,(unsigned long) dummy,zatm_dev->pool_base+
-		    pool*2+1);
-		spin_unlock_irqrestore(&zatm_dev->lock, flags);
-		zatm_dev->last_free[pool] = NULL;
-		refill_pool(dev,pool);
-	}
-	DPRINTK("pool %d: %d\n",pool,zatm_dev->pool_info[pool].ref_count);
-}
-
-
-static void unuse_pool(struct atm_dev *dev,int pool)
-{
-	if (!(--ZATM_DEV(dev)->pool_info[pool].ref_count))
-		drain_free(dev,pool);
-}
-
-/*----------------------------------- RX ------------------------------------*/
-
-
-#if 0
-static void exception(struct atm_vcc *vcc)
-{
-   static int count = 0;
-   struct zatm_dev *zatm_dev = ZATM_DEV(vcc->dev);
-   struct zatm_vcc *zatm_vcc = ZATM_VCC(vcc);
-   unsigned long *qrp;
-   int i;
-
-   if (count++ > 2) return;
-   for (i = 0; i < 8; i++)
-	printk("TX%d: 0x%08lx\n",i,
-	  zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+i));
-   for (i = 0; i < 5; i++)
-	printk("SH%d: 0x%08lx\n",i,
-	  zpeekl(zatm_dev,uPD98401_IM(zatm_vcc->shaper)+16*i));
-   qrp = (unsigned long *) zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
-     uPD98401_TXVC_QRP);
-   printk("qrp=0x%08lx\n",(unsigned long) qrp);
-   for (i = 0; i < 4; i++) printk("QRP[%d]: 0x%08lx",i,qrp[i]);
-}
-#endif
-
-
-static const char *err_txt[] = {
-	"No error",
-	"RX buf underflow",
-	"RX FIFO overrun",
-	"Maximum len violation",
-	"CRC error",
-	"User abort",
-	"Length violation",
-	"T1 error",
-	"Deactivated",
-	"???",
-	"???",
-	"???",
-	"???",
-	"???",
-	"???",
-	"???"
-};
-
-
-static void poll_rx(struct atm_dev *dev,int mbx)
-{
-	struct zatm_dev *zatm_dev;
-	unsigned long pos;
-	u32 x;
-	int error;
-
-	EVENT("poll_rx\n",0,0);
-	zatm_dev = ZATM_DEV(dev);
-	pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
-	while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
-		u32 *here;
-		struct sk_buff *skb;
-		struct atm_vcc *vcc;
-		int cells,size,chan;
-
-		EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
-		here = (u32 *) pos;
-		if (((pos += 16) & 0xffff) == zatm_dev->mbx_end[mbx])
-			pos = zatm_dev->mbx_start[mbx];
-		cells = here[0] & uPD98401_AAL5_SIZE;
-#if 0
-printk("RX IND: 0x%x, 0x%x, 0x%x, 0x%x\n",here[0],here[1],here[2],here[3]);
-{
-unsigned long *x;
-		printk("POOL: 0x%08x, 0x%08x\n",zpeekl(zatm_dev,
-		      zatm_dev->pool_base),
-		      zpeekl(zatm_dev,zatm_dev->pool_base+1));
-		x = (unsigned long *) here[2];
-		printk("[0..3] = 0x%08lx, 0x%08lx, 0x%08lx, 0x%08lx\n",
-		    x[0],x[1],x[2],x[3]);
-}
-#endif
-		error = 0;
-		if (here[3] & uPD98401_AAL5_ERR) {
-			error = (here[3] & uPD98401_AAL5_ES) >>
-			    uPD98401_AAL5_ES_SHIFT;
-			if (error == uPD98401_AAL5_ES_DEACT ||
-			    error == uPD98401_AAL5_ES_FREE) continue;
-		}
-EVENT("error code 0x%x/0x%x\n",(here[3] & uPD98401_AAL5_ES) >>
-  uPD98401_AAL5_ES_SHIFT,error);
-		skb = ((struct rx_buffer_head *) bus_to_virt(here[2]))->skb;
-		__net_timestamp(skb);
-#if 0
-printk("[-3..0] 0x%08lx 0x%08lx 0x%08lx 0x%08lx\n",((unsigned *) skb->data)[-3],
-  ((unsigned *) skb->data)[-2],((unsigned *) skb->data)[-1],
-  ((unsigned *) skb->data)[0]);
-#endif
-		EVENT("skb 0x%lx, here 0x%lx\n",(unsigned long) skb,
-		    (unsigned long) here);
-#if 0
-printk("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
-#endif
-		size = error ? 0 : ntohs(((__be16 *) skb->data)[cells*
-		    ATM_CELL_PAYLOAD/sizeof(u16)-3]);
-		EVENT("got skb 0x%lx, size %d\n",(unsigned long) skb,size);
-		chan = (here[3] & uPD98401_AAL5_CHAN) >>
-		    uPD98401_AAL5_CHAN_SHIFT;
-		if (chan < zatm_dev->chans && zatm_dev->rx_map[chan]) {
-			int pos;
-			vcc = zatm_dev->rx_map[chan];
-			pos = ZATM_VCC(vcc)->pool;
-			if (skb == zatm_dev->last_free[pos])
-				zatm_dev->last_free[pos] = NULL;
-			skb_unlink(skb, zatm_dev->pool + pos);
-		}
-		else {
-			printk(KERN_ERR DEV_LABEL "(itf %d): RX indication "
-			    "for non-existing channel\n",dev->number);
-			size = 0;
-			vcc = NULL;
-			event_dump();
-		}
-		if (error) {
-			static unsigned long silence = 0;
-			static int last_error = 0;
-
-			if (error != last_error ||
-			    time_after(jiffies, silence)  || silence == 0){
-				printk(KERN_WARNING DEV_LABEL "(itf %d): "
-				    "chan %d error %s\n",dev->number,chan,
-				    err_txt[error]);
-				last_error = error;
-				silence = (jiffies+2*HZ)|1;
-			}
-			size = 0;
-		}
-		if (size && (size > cells*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER ||
-		    size <= (cells-1)*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER)) {
-			printk(KERN_ERR DEV_LABEL "(itf %d): size %d with %d "
-			    "cells\n",dev->number,size,cells);
-			size = 0;
-			event_dump();
-		}
-		if (size > ATM_MAX_AAL5_PDU) {
-			printk(KERN_ERR DEV_LABEL "(itf %d): size too big "
-			    "(%d)\n",dev->number,size);
-			size = 0;
-			event_dump();
-		}
-		if (!size) {
-			dev_kfree_skb_irq(skb);
-			if (vcc) atomic_inc(&vcc->stats->rx_err);
-			continue;
-		}
-		if (!atm_charge(vcc,skb->truesize)) {
-			dev_kfree_skb_irq(skb);
-			continue;
-		}
-		skb->len = size;
-		ATM_SKB(skb)->vcc = vcc;
-		vcc->push(vcc,skb);
-		atomic_inc(&vcc->stats->rx);
-	}
-	zout(pos & 0xffff,MTA(mbx));
-#if 0 /* probably a stupid idea */
-	refill_pool(dev,zatm_vcc->pool);
-		/* maybe this saves us a few interrupts */
-#endif
-}
-
-
-static int open_rx_first(struct atm_vcc *vcc)
-{
-	struct zatm_dev *zatm_dev;
-	struct zatm_vcc *zatm_vcc;
-	unsigned long flags;
-	unsigned short chan;
-	int cells;
-
-	DPRINTK("open_rx_first (0x%x)\n",inb_p(0xc053));
-	zatm_dev = ZATM_DEV(vcc->dev);
-	zatm_vcc = ZATM_VCC(vcc);
-	zatm_vcc->rx_chan = 0;
-	if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
-	if (vcc->qos.aal == ATM_AAL5) {
-		if (vcc->qos.rxtp.max_sdu > 65464)
-			vcc->qos.rxtp.max_sdu = 65464;
-			/* fix this - we may want to receive 64kB SDUs
-			   later */
-		cells = DIV_ROUND_UP(vcc->qos.rxtp.max_sdu + ATM_AAL5_TRAILER,
-				ATM_CELL_PAYLOAD);
-		zatm_vcc->pool = pool_index(cells*ATM_CELL_PAYLOAD);
-	}
-	else {
-		cells = 1;
-		zatm_vcc->pool = ZATM_AAL0_POOL;
-	}
-	if (zatm_vcc->pool < 0) return -EMSGSIZE;
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	zwait();
-	zout(uPD98401_OPEN_CHAN,CMR);
-	zwait();
-	DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
-	chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	DPRINTK("chan is %d\n",chan);
-	if (!chan) return -EAGAIN;
-	use_pool(vcc->dev,zatm_vcc->pool);
-	DPRINTK("pool %d\n",zatm_vcc->pool);
-	/* set up VC descriptor */
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	zpokel(zatm_dev,zatm_vcc->pool << uPD98401_RXVC_POOL_SHIFT,
-	    chan*VC_SIZE/4);
-	zpokel(zatm_dev,uPD98401_RXVC_OD | (vcc->qos.aal == ATM_AAL5 ?
-	    uPD98401_RXVC_AR : 0) | cells,chan*VC_SIZE/4+1);
-	zpokel(zatm_dev,0,chan*VC_SIZE/4+2);
-	zatm_vcc->rx_chan = chan;
-	zatm_dev->rx_map[chan] = vcc;
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	return 0;
-}
-
-
-static int open_rx_second(struct atm_vcc *vcc)
-{
-	struct zatm_dev *zatm_dev;
-	struct zatm_vcc *zatm_vcc;
-	unsigned long flags;
-	int pos,shift;
-
-	DPRINTK("open_rx_second (0x%x)\n",inb_p(0xc053));
-	zatm_dev = ZATM_DEV(vcc->dev);
-	zatm_vcc = ZATM_VCC(vcc);
-	if (!zatm_vcc->rx_chan) return 0;
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	/* should also handle VPI @@@ */
-	pos = vcc->vci >> 1;
-	shift = (1-(vcc->vci & 1)) << 4;
-	zpokel(zatm_dev,(zpeekl(zatm_dev,pos) & ~(0xffff << shift)) |
-	    ((zatm_vcc->rx_chan | uPD98401_RXLT_ENBL) << shift),pos);
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	return 0;
-}
-
-
-static void close_rx(struct atm_vcc *vcc)
-{
-	struct zatm_dev *zatm_dev;
-	struct zatm_vcc *zatm_vcc;
-	unsigned long flags;
-	int pos,shift;
-
-	zatm_vcc = ZATM_VCC(vcc);
-	zatm_dev = ZATM_DEV(vcc->dev);
-	if (!zatm_vcc->rx_chan) return;
-	DPRINTK("close_rx\n");
-	/* disable receiver */
-	if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
-		spin_lock_irqsave(&zatm_dev->lock, flags);
-		pos = vcc->vci >> 1;
-		shift = (1-(vcc->vci & 1)) << 4;
-		zpokel(zatm_dev,zpeekl(zatm_dev,pos) & ~(0xffff << shift),pos);
-		zwait();
-		zout(uPD98401_NOP,CMR);
-		zwait();
-		zout(uPD98401_NOP,CMR);
-		spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	}
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	zwait();
-	zout(uPD98401_DEACT_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
-	    uPD98401_CHAN_ADDR_SHIFT),CMR);
-	zwait();
-	udelay(10); /* why oh why ... ? */
-	zout(uPD98401_CLOSE_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
-	    uPD98401_CHAN_ADDR_SHIFT),CMR);
-	zwait();
-	if (!(zin(CMR) & uPD98401_CHAN_ADDR))
-		printk(KERN_CRIT DEV_LABEL "(itf %d): can't close RX channel "
-		    "%d\n",vcc->dev->number,zatm_vcc->rx_chan);
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	zatm_dev->rx_map[zatm_vcc->rx_chan] = NULL;
-	zatm_vcc->rx_chan = 0;
-	unuse_pool(vcc->dev,zatm_vcc->pool);
-}
-
-
-static int start_rx(struct atm_dev *dev)
-{
-	struct zatm_dev *zatm_dev;
-	int i;
-
-	DPRINTK("start_rx\n");
-	zatm_dev = ZATM_DEV(dev);
-	zatm_dev->rx_map = kcalloc(zatm_dev->chans,
-				   sizeof(*zatm_dev->rx_map),
-				   GFP_KERNEL);
-	if (!zatm_dev->rx_map) return -ENOMEM;
-	/* set VPI/VCI split (use all VCIs and give what's left to VPIs) */
-	zpokel(zatm_dev,(1 << dev->ci_range.vci_bits)-1,uPD98401_VRR);
-	/* prepare free buffer pools */
-	for (i = 0; i <= ZATM_LAST_POOL; i++) {
-		zatm_dev->pool_info[i].ref_count = 0;
-		zatm_dev->pool_info[i].rqa_count = 0;
-		zatm_dev->pool_info[i].rqu_count = 0;
-		zatm_dev->pool_info[i].low_water = LOW_MARK;
-		zatm_dev->pool_info[i].high_water = HIGH_MARK;
-		zatm_dev->pool_info[i].offset = 0;
-		zatm_dev->pool_info[i].next_off = 0;
-		zatm_dev->pool_info[i].next_cnt = 0;
-		zatm_dev->pool_info[i].next_thres = OFF_CNG_THRES;
-	}
-	return 0;
-}
-
-
-/*----------------------------------- TX ------------------------------------*/
-
-
-static int do_tx(struct sk_buff *skb)
-{
-	struct atm_vcc *vcc;
-	struct zatm_dev *zatm_dev;
-	struct zatm_vcc *zatm_vcc;
-	u32 *dsc;
-	unsigned long flags;
-
-	EVENT("do_tx\n",0,0);
-	DPRINTK("sending skb %p\n",skb);
-	vcc = ATM_SKB(skb)->vcc;
-	zatm_dev = ZATM_DEV(vcc->dev);
-	zatm_vcc = ZATM_VCC(vcc);
-	EVENT("iovcnt=%d\n",skb_shinfo(skb)->nr_frags,0);
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	if (!skb_shinfo(skb)->nr_frags) {
-		if (zatm_vcc->txing == RING_ENTRIES-1) {
-			spin_unlock_irqrestore(&zatm_dev->lock, flags);
-			return RING_BUSY;
-		}
-		zatm_vcc->txing++;
-		dsc = zatm_vcc->ring+zatm_vcc->ring_curr;
-		zatm_vcc->ring_curr = (zatm_vcc->ring_curr+RING_WORDS) &
-		    (RING_ENTRIES*RING_WORDS-1);
-		dsc[1] = 0;
-		dsc[2] = skb->len;
-		dsc[3] = virt_to_bus(skb->data);
-		mb();
-		dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP | uPD98401_TXPD_SM
-		    | (vcc->qos.aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
-		    (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
-		    uPD98401_CLPM_1 : uPD98401_CLPM_0));
-		EVENT("dsc (0x%lx)\n",(unsigned long) dsc,0);
-	}
-	else {
-printk("NONONONOO!!!!\n");
-		dsc = NULL;
-#if 0
-		u32 *put;
-		int i;
-
-		dsc = kmalloc(uPD98401_TXPD_SIZE * 2 +
-			uPD98401_TXBD_SIZE * ATM_SKB(skb)->iovcnt, GFP_ATOMIC);
-		if (!dsc) {
-			if (vcc->pop)
-				vcc->pop(vcc, skb);
-			else
-				dev_kfree_skb_irq(skb);
-			return -EAGAIN;
-		}
-		/* @@@ should check alignment */
-		put = dsc+8;
-		dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP |
-		    (vcc->aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
-		    (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
-		    uPD98401_CLPM_1 : uPD98401_CLPM_0));
-		dsc[1] = 0;
-		dsc[2] = ATM_SKB(skb)->iovcnt * uPD98401_TXBD_SIZE;
-		dsc[3] = virt_to_bus(put);
-		for (i = 0; i < ATM_SKB(skb)->iovcnt; i++) {
-			*put++ = ((struct iovec *) skb->data)[i].iov_len;
-			*put++ = virt_to_bus(((struct iovec *)
-			    skb->data)[i].iov_base);
-		}
-		put[-2] |= uPD98401_TXBD_LAST;
-#endif
-	}
-	ZATM_PRV_DSC(skb) = dsc;
-	skb_queue_tail(&zatm_vcc->tx_queue,skb);
-	DPRINTK("QRP=0x%08lx\n",zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
-	  uPD98401_TXVC_QRP));
-	zwait();
-	zout(uPD98401_TX_READY | (zatm_vcc->tx_chan <<
-	    uPD98401_CHAN_ADDR_SHIFT),CMR);
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	EVENT("done\n",0,0);
-	return 0;
-}
-
-
-static inline void dequeue_tx(struct atm_vcc *vcc)
-{
-	struct zatm_vcc *zatm_vcc;
-	struct sk_buff *skb;
-
-	EVENT("dequeue_tx\n",0,0);
-	zatm_vcc = ZATM_VCC(vcc);
-	skb = skb_dequeue(&zatm_vcc->tx_queue);
-	if (!skb) {
-		printk(KERN_CRIT DEV_LABEL "(itf %d): dequeue_tx but not "
-		    "txing\n",vcc->dev->number);
-		return;
-	}
-#if 0 /* @@@ would fail on CLP */
-if (*ZATM_PRV_DSC(skb) != (uPD98401_TXPD_V | uPD98401_TXPD_DP |
-  uPD98401_TXPD_SM | uPD98401_TXPD_AAL5)) printk("@#*$!!!!  (%08x)\n",
-  *ZATM_PRV_DSC(skb));
-#endif
-	*ZATM_PRV_DSC(skb) = 0; /* mark as invalid */
-	zatm_vcc->txing--;
-	if (vcc->pop) vcc->pop(vcc,skb);
-	else dev_kfree_skb_irq(skb);
-	while ((skb = skb_dequeue(&zatm_vcc->backlog)))
-		if (do_tx(skb) == RING_BUSY) {
-			skb_queue_head(&zatm_vcc->backlog,skb);
-			break;
-		}
-	atomic_inc(&vcc->stats->tx);
-	wake_up(&zatm_vcc->tx_wait);
-}
-
-
-static void poll_tx(struct atm_dev *dev,int mbx)
-{
-	struct zatm_dev *zatm_dev;
-	unsigned long pos;
-	u32 x;
-
-	EVENT("poll_tx\n",0,0);
-	zatm_dev = ZATM_DEV(dev);
-	pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
-	while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
-		int chan;
-
-#if 1
-		u32 data,*addr;
-
-		EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
-		addr = (u32 *) pos;
-		data = *addr;
-		chan = (data & uPD98401_TXI_CONN) >> uPD98401_TXI_CONN_SHIFT;
-		EVENT("addr = 0x%lx, data = 0x%08x,",(unsigned long) addr,
-		    data);
-		EVENT("chan = %d\n",chan,0);
-#else
-NO !
-		chan = (zatm_dev->mbx_start[mbx][pos >> 2] & uPD98401_TXI_CONN)
-		>> uPD98401_TXI_CONN_SHIFT;
-#endif
-		if (chan < zatm_dev->chans && zatm_dev->tx_map[chan])
-			dequeue_tx(zatm_dev->tx_map[chan]);
-		else {
-			printk(KERN_CRIT DEV_LABEL "(itf %d): TX indication "
-			    "for non-existing channel %d\n",dev->number,chan);
-			event_dump();
-		}
-		if (((pos += 4) & 0xffff) == zatm_dev->mbx_end[mbx])
-			pos = zatm_dev->mbx_start[mbx];
-	}
-	zout(pos & 0xffff,MTA(mbx));
-}
-
-
-/*
- * BUG BUG BUG: Doesn't handle "new-style" rate specification yet.
- */
-
-static int alloc_shaper(struct atm_dev *dev,int *pcr,int min,int max,int ubr)
-{
-	struct zatm_dev *zatm_dev;
-	unsigned long flags;
-	unsigned long i,m,c;
-	int shaper;
-
-	DPRINTK("alloc_shaper (min = %d, max = %d)\n",min,max);
-	zatm_dev = ZATM_DEV(dev);
-	if (!zatm_dev->free_shapers) return -EAGAIN;
-	for (shaper = 0; !((zatm_dev->free_shapers >> shaper) & 1); shaper++);
-	zatm_dev->free_shapers &= ~1 << shaper;
-	if (ubr) {
-		c = 5;
-		i = m = 1;
-		zatm_dev->ubr_ref_cnt++;
-		zatm_dev->ubr = shaper;
-		*pcr = 0;
-	}
-	else {
-		if (min) {
-			if (min <= 255) {
-				i = min;
-				m = ATM_OC3_PCR;
-			}
-			else {
-				i = 255;
-				m = ATM_OC3_PCR*255/min;
-			}
-		}
-		else {
-			if (max > zatm_dev->tx_bw) max = zatm_dev->tx_bw;
-			if (max <= 255) {
-				i = max;
-				m = ATM_OC3_PCR;
-			}
-			else {
-				i = 255;
-				m = DIV_ROUND_UP(ATM_OC3_PCR*255, max);
-			}
-		}
-		if (i > m) {
-			printk(KERN_CRIT DEV_LABEL "shaper algorithm botched "
-			    "[%d,%d] -> i=%ld,m=%ld\n",min,max,i,m);
-			m = i;
-		}
-		*pcr = i*ATM_OC3_PCR/m;
-		c = 20; /* @@@ should use max_cdv ! */
-		if ((min && *pcr < min) || (max && *pcr > max)) return -EINVAL;
-		if (zatm_dev->tx_bw < *pcr) return -EAGAIN;
-		zatm_dev->tx_bw -= *pcr;
-	}
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	DPRINTK("i = %d, m = %d, PCR = %d\n",i,m,*pcr);
-	zpokel(zatm_dev,(i << uPD98401_IM_I_SHIFT) | m,uPD98401_IM(shaper));
-	zpokel(zatm_dev,c << uPD98401_PC_C_SHIFT,uPD98401_PC(shaper));
-	zpokel(zatm_dev,0,uPD98401_X(shaper));
-	zpokel(zatm_dev,0,uPD98401_Y(shaper));
-	zpokel(zatm_dev,uPD98401_PS_E,uPD98401_PS(shaper));
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	return shaper;
-}
-
-
-static void dealloc_shaper(struct atm_dev *dev,int shaper)
-{
-	struct zatm_dev *zatm_dev;
-	unsigned long flags;
-
-	zatm_dev = ZATM_DEV(dev);
-	if (shaper == zatm_dev->ubr) {
-		if (--zatm_dev->ubr_ref_cnt) return;
-		zatm_dev->ubr = -1;
-	}
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	zpokel(zatm_dev,zpeekl(zatm_dev,uPD98401_PS(shaper)) & ~uPD98401_PS_E,
-	    uPD98401_PS(shaper));
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	zatm_dev->free_shapers |= 1 << shaper;
-}
-
-
-static void close_tx(struct atm_vcc *vcc)
-{
-	struct zatm_dev *zatm_dev;
-	struct zatm_vcc *zatm_vcc;
-	unsigned long flags;
-	int chan;
-
-	zatm_vcc = ZATM_VCC(vcc);
-	zatm_dev = ZATM_DEV(vcc->dev);
-	chan = zatm_vcc->tx_chan;
-	if (!chan) return;
-	DPRINTK("close_tx\n");
-	if (skb_peek(&zatm_vcc->backlog)) {
-		printk("waiting for backlog to drain ...\n");
-		event_dump();
-		wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->backlog));
-	}
-	if (skb_peek(&zatm_vcc->tx_queue)) {
-		printk("waiting for TX queue to drain ...\n");
-		event_dump();
-		wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->tx_queue));
-	}
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-#if 0
-	zwait();
-	zout(uPD98401_DEACT_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
-#endif
-	zwait();
-	zout(uPD98401_CLOSE_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
-	zwait();
-	if (!(zin(CMR) & uPD98401_CHAN_ADDR))
-		printk(KERN_CRIT DEV_LABEL "(itf %d): can't close TX channel "
-		    "%d\n",vcc->dev->number,chan);
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	zatm_vcc->tx_chan = 0;
-	zatm_dev->tx_map[chan] = NULL;
-	if (zatm_vcc->shaper != zatm_dev->ubr) {
-		zatm_dev->tx_bw += vcc->qos.txtp.min_pcr;
-		dealloc_shaper(vcc->dev,zatm_vcc->shaper);
-	}
-	kfree(zatm_vcc->ring);
-}
-
-
-static int open_tx_first(struct atm_vcc *vcc)
-{
-	struct zatm_dev *zatm_dev;
-	struct zatm_vcc *zatm_vcc;
-	unsigned long flags;
-	u32 *loop;
-	unsigned short chan;
-	int unlimited;
-
-	DPRINTK("open_tx_first\n");
-	zatm_dev = ZATM_DEV(vcc->dev);
-	zatm_vcc = ZATM_VCC(vcc);
-	zatm_vcc->tx_chan = 0;
-	if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	zwait();
-	zout(uPD98401_OPEN_CHAN,CMR);
-	zwait();
-	DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
-	chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	DPRINTK("chan is %d\n",chan);
-	if (!chan) return -EAGAIN;
-	unlimited = vcc->qos.txtp.traffic_class == ATM_UBR &&
-	    (!vcc->qos.txtp.max_pcr || vcc->qos.txtp.max_pcr == ATM_MAX_PCR ||
-	    vcc->qos.txtp.max_pcr >= ATM_OC3_PCR);
-	if (unlimited && zatm_dev->ubr != -1) zatm_vcc->shaper = zatm_dev->ubr;
-	else {
-		int pcr;
-
-		if (unlimited) vcc->qos.txtp.max_sdu = ATM_MAX_AAL5_PDU;
-		if ((zatm_vcc->shaper = alloc_shaper(vcc->dev,&pcr,
-		    vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,unlimited))
-		    < 0) {
-			close_tx(vcc);
-			return zatm_vcc->shaper;
-		}
-		if (pcr > ATM_OC3_PCR) pcr = ATM_OC3_PCR;
-		vcc->qos.txtp.min_pcr = vcc->qos.txtp.max_pcr = pcr;
-	}
-	zatm_vcc->tx_chan = chan;
-	skb_queue_head_init(&zatm_vcc->tx_queue);
-	init_waitqueue_head(&zatm_vcc->tx_wait);
-	/* initialize ring */
-	zatm_vcc->ring = kzalloc(RING_SIZE,GFP_KERNEL);
-	if (!zatm_vcc->ring) return -ENOMEM;
-	loop = zatm_vcc->ring+RING_ENTRIES*RING_WORDS;
-	loop[0] = uPD98401_TXPD_V;
-	loop[1] = loop[2] = 0;
-	loop[3] = virt_to_bus(zatm_vcc->ring);
-	zatm_vcc->ring_curr = 0;
-	zatm_vcc->txing = 0;
-	skb_queue_head_init(&zatm_vcc->backlog);
-	zpokel(zatm_dev,virt_to_bus(zatm_vcc->ring),
-	    chan*VC_SIZE/4+uPD98401_TXVC_QRP);
-	return 0;
-}
-
-
-static int open_tx_second(struct atm_vcc *vcc)
-{
-	struct zatm_dev *zatm_dev;
-	struct zatm_vcc *zatm_vcc;
-	unsigned long flags;
-
-	DPRINTK("open_tx_second\n");
-	zatm_dev = ZATM_DEV(vcc->dev);
-	zatm_vcc = ZATM_VCC(vcc);
-	if (!zatm_vcc->tx_chan) return 0;
-	/* set up VC descriptor */
-	spin_lock_irqsave(&zatm_dev->lock, flags);
-	zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4);
-	zpokel(zatm_dev,uPD98401_TXVC_L | (zatm_vcc->shaper <<
-	    uPD98401_TXVC_SHP_SHIFT) | (vcc->vpi << uPD98401_TXVC_VPI_SHIFT) |
-	    vcc->vci,zatm_vcc->tx_chan*VC_SIZE/4+1);
-	zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4+2);
-	spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	zatm_dev->tx_map[zatm_vcc->tx_chan] = vcc;
-	return 0;
-}
-
-
-static int start_tx(struct atm_dev *dev)
-{
-	struct zatm_dev *zatm_dev;
-	int i;
-
-	DPRINTK("start_tx\n");
-	zatm_dev = ZATM_DEV(dev);
-	zatm_dev->tx_map = kmalloc_array(zatm_dev->chans,
-					 sizeof(*zatm_dev->tx_map),
-					 GFP_KERNEL);
-	if (!zatm_dev->tx_map) return -ENOMEM;
-	zatm_dev->tx_bw = ATM_OC3_PCR;
-	zatm_dev->free_shapers = (1 << NR_SHAPERS)-1;
-	zatm_dev->ubr = -1;
-	zatm_dev->ubr_ref_cnt = 0;
-	/* initialize shapers */
-	for (i = 0; i < NR_SHAPERS; i++) zpokel(zatm_dev,0,uPD98401_PS(i));
-	return 0;
-}
-
-
-/*------------------------------- interrupts --------------------------------*/
-
-
-static irqreturn_t zatm_int(int irq,void *dev_id)
-{
-	struct atm_dev *dev;
-	struct zatm_dev *zatm_dev;
-	u32 reason;
-	int handled = 0;
-
-	dev = dev_id;
-	zatm_dev = ZATM_DEV(dev);
-	while ((reason = zin(GSR))) {
-		handled = 1;
-		EVENT("reason 0x%x\n",reason,0);
-		if (reason & uPD98401_INT_PI) {
-			EVENT("PHY int\n",0,0);
-			dev->phy->interrupt(dev);
-		}
-		if (reason & uPD98401_INT_RQA) {
-			unsigned long pools;
-			int i;
-
-			pools = zin(RQA);
-			EVENT("RQA (0x%08x)\n",pools,0);
-			for (i = 0; pools; i++) {
-				if (pools & 1) {
-					refill_pool(dev,i);
-					zatm_dev->pool_info[i].rqa_count++;
-				}
-				pools >>= 1;
-			}
-		}
-		if (reason & uPD98401_INT_RQU) {
-			unsigned long pools;
-			int i;
-			pools = zin(RQU);
-			printk(KERN_WARNING DEV_LABEL "(itf %d): RQU 0x%08lx\n",
-			    dev->number,pools);
-			event_dump();
-			for (i = 0; pools; i++) {
-				if (pools & 1) {
-					refill_pool(dev,i);
-					zatm_dev->pool_info[i].rqu_count++;
-				}
-				pools >>= 1;
-			}
-		}
-		/* don't handle RD */
-		if (reason & uPD98401_INT_SPE)
-			printk(KERN_ALERT DEV_LABEL "(itf %d): system parity "
-			    "error at 0x%08x\n",dev->number,zin(ADDR));
-		if (reason & uPD98401_INT_CPE)
-			printk(KERN_ALERT DEV_LABEL "(itf %d): control memory "
-			    "parity error at 0x%08x\n",dev->number,zin(ADDR));
-		if (reason & uPD98401_INT_SBE) {
-			printk(KERN_ALERT DEV_LABEL "(itf %d): system bus "
-			    "error at 0x%08x\n",dev->number,zin(ADDR));
-			event_dump();
-		}
-		/* don't handle IND */
-		if (reason & uPD98401_INT_MF) {
-			printk(KERN_CRIT DEV_LABEL "(itf %d): mailbox full "
-			    "(0x%x)\n",dev->number,(reason & uPD98401_INT_MF)
-			    >> uPD98401_INT_MF_SHIFT);
-			event_dump();
-			    /* @@@ should try to recover */
-		}
-		if (reason & uPD98401_INT_MM) {
-			if (reason & 1) poll_rx(dev,0);
-			if (reason & 2) poll_rx(dev,1);
-			if (reason & 4) poll_tx(dev,2);
-			if (reason & 8) poll_tx(dev,3);
-		}
-		/* @@@ handle RCRn */
-	}
-	return IRQ_RETVAL(handled);
-}
-
-
-/*----------------------------- (E)EPROM access -----------------------------*/
-
-
-static void eprom_set(struct zatm_dev *zatm_dev, unsigned long value,
-		      unsigned short cmd)
-{
-	int error;
-
-	if ((error = pci_write_config_dword(zatm_dev->pci_dev,cmd,value)))
-		printk(KERN_ERR DEV_LABEL ": PCI write failed (0x%02x)\n",
-		    error);
-}
-
-
-static unsigned long eprom_get(struct zatm_dev *zatm_dev, unsigned short cmd)
-{
-	unsigned int value;
-	int error;
-
-	if ((error = pci_read_config_dword(zatm_dev->pci_dev,cmd,&value)))
-		printk(KERN_ERR DEV_LABEL ": PCI read failed (0x%02x)\n",
-		    error);
-	return value;
-}
-
-
-static void eprom_put_bits(struct zatm_dev *zatm_dev, unsigned long data,
-			   int bits, unsigned short cmd)
-{
-	unsigned long value;
-	int i;
-
-	for (i = bits-1; i >= 0; i--) {
-		value = ZEPROM_CS | (((data >> i) & 1) ? ZEPROM_DI : 0);
-		eprom_set(zatm_dev,value,cmd);
-		eprom_set(zatm_dev,value | ZEPROM_SK,cmd);
-		eprom_set(zatm_dev,value,cmd);
-	}
-}
-
-
-static void eprom_get_byte(struct zatm_dev *zatm_dev, unsigned char *byte,
-			   unsigned short cmd)
-{
-	int i;
-
-	*byte = 0;
-	for (i = 8; i; i--) {
-		eprom_set(zatm_dev,ZEPROM_CS,cmd);
-		eprom_set(zatm_dev,ZEPROM_CS | ZEPROM_SK,cmd);
-		*byte <<= 1;
-		if (eprom_get(zatm_dev,cmd) & ZEPROM_DO) *byte |= 1;
-		eprom_set(zatm_dev,ZEPROM_CS,cmd);
-	}
-}
-
-
-static int eprom_try_esi(struct atm_dev *dev, unsigned short cmd, int offset,
-			 int swap)
-{
-	unsigned char buf[ZEPROM_SIZE];
-	struct zatm_dev *zatm_dev;
-	int i;
-
-	zatm_dev = ZATM_DEV(dev);
-	for (i = 0; i < ZEPROM_SIZE; i += 2) {
-		eprom_set(zatm_dev,ZEPROM_CS,cmd); /* select EPROM */
-		eprom_put_bits(zatm_dev,ZEPROM_CMD_READ,ZEPROM_CMD_LEN,cmd);
-		eprom_put_bits(zatm_dev,i >> 1,ZEPROM_ADDR_LEN,cmd);
-		eprom_get_byte(zatm_dev,buf+i+swap,cmd);
-		eprom_get_byte(zatm_dev,buf+i+1-swap,cmd);
-		eprom_set(zatm_dev,0,cmd); /* deselect EPROM */
-	}
-	memcpy(dev->esi,buf+offset,ESI_LEN);
-	return memcmp(dev->esi,"\0\0\0\0\0",ESI_LEN); /* assumes ESI_LEN == 6 */
-}
-
-
-static void eprom_get_esi(struct atm_dev *dev)
-{
-	if (eprom_try_esi(dev,ZEPROM_V1_REG,ZEPROM_V1_ESI_OFF,1)) return;
-	(void) eprom_try_esi(dev,ZEPROM_V2_REG,ZEPROM_V2_ESI_OFF,0);
-}
-
-
-/*--------------------------------- entries ---------------------------------*/
-
-
-static int zatm_init(struct atm_dev *dev)
-{
-	struct zatm_dev *zatm_dev;
-	struct pci_dev *pci_dev;
-	unsigned short command;
-	int error,i,last;
-	unsigned long t0,t1,t2;
-
-	DPRINTK(">zatm_init\n");
-	zatm_dev = ZATM_DEV(dev);
-	spin_lock_init(&zatm_dev->lock);
-	pci_dev = zatm_dev->pci_dev;
-	zatm_dev->base = pci_resource_start(pci_dev, 0);
-	zatm_dev->irq = pci_dev->irq;
-	if ((error = pci_read_config_word(pci_dev,PCI_COMMAND,&command))) {
-		printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
-		    dev->number,error);
-		return -EINVAL;
-	}
-	if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
-	    command | PCI_COMMAND_IO | PCI_COMMAND_MASTER))) {
-		printk(KERN_ERR DEV_LABEL "(itf %d): can't enable IO (0x%02x)"
-		    "\n",dev->number,error);
-		return -EIO;
-	}
-	eprom_get_esi(dev);
-	printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%x,irq=%d,",
-	    dev->number,pci_dev->revision,zatm_dev->base,zatm_dev->irq);
-	/* reset uPD98401 */
-	zout(0,SWR);
-	while (!(zin(GSR) & uPD98401_INT_IND));
-	zout(uPD98401_GMR_ONE /*uPD98401_BURST4*/,GMR);
-	last = MAX_CRAM_SIZE;
-	for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
-		zpokel(zatm_dev,0x55555555,i);
-		if (zpeekl(zatm_dev,i) != 0x55555555) last = i;
-		else {
-			zpokel(zatm_dev,0xAAAAAAAA,i);
-			if (zpeekl(zatm_dev,i) != 0xAAAAAAAA) last = i;
-			else zpokel(zatm_dev,i,i);
-		}
-	}
-	for (i = 0; i < last; i += RAM_INCREMENT)
-		if (zpeekl(zatm_dev,i) != i) break;
-	zatm_dev->mem = i << 2;
-	while (i) zpokel(zatm_dev,0,--i);
-	/* reset again to rebuild memory pointers */
-	zout(0,SWR);
-	while (!(zin(GSR) & uPD98401_INT_IND));
-	zout(uPD98401_GMR_ONE | uPD98401_BURST8 | uPD98401_BURST4 |
-	    uPD98401_BURST2 | uPD98401_GMR_PM | uPD98401_GMR_DR,GMR);
-	/* TODO: should shrink allocation now */
-	printk("mem=%dkB,%s (",zatm_dev->mem >> 10,zatm_dev->copper ? "UTP" :
-	    "MMF");
-	for (i = 0; i < ESI_LEN; i++)
-		printk("%02X%s",dev->esi[i],i == ESI_LEN-1 ? ")\n" : "-");
-	do {
-		unsigned long flags;
-
-		spin_lock_irqsave(&zatm_dev->lock, flags);
-		t0 = zpeekl(zatm_dev,uPD98401_TSR);
-		udelay(10);
-		t1 = zpeekl(zatm_dev,uPD98401_TSR);
-		udelay(1010);
-		t2 = zpeekl(zatm_dev,uPD98401_TSR);
-		spin_unlock_irqrestore(&zatm_dev->lock, flags);
-	}
-	while (t0 > t1 || t1 > t2); /* loop if wrapping ... */
-	zatm_dev->khz = t2-2*t1+t0;
-	printk(KERN_NOTICE DEV_LABEL "(itf %d): uPD98401 %d.%d at %d.%03d "
-	    "MHz\n",dev->number,
-	    (zin(VER) & uPD98401_MAJOR) >> uPD98401_MAJOR_SHIFT,
-            zin(VER) & uPD98401_MINOR,zatm_dev->khz/1000,zatm_dev->khz % 1000);
-	return uPD98402_init(dev);
-}
-
-
-static int zatm_start(struct atm_dev *dev)
-{
-	struct zatm_dev *zatm_dev = ZATM_DEV(dev);
-	struct pci_dev *pdev = zatm_dev->pci_dev;
-	unsigned long curr;
-	int pools,vccs,rx;
-	int error, i, ld;
-
-	DPRINTK("zatm_start\n");
-	zatm_dev->rx_map = zatm_dev->tx_map = NULL;
- 	for (i = 0; i < NR_MBX; i++)
- 		zatm_dev->mbx_start[i] = 0;
- 	error = request_irq(zatm_dev->irq, zatm_int, IRQF_SHARED, DEV_LABEL, dev);
-	if (error < 0) {
- 		printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
- 		    dev->number,zatm_dev->irq);
-		goto done;
-	}
-	/* define memory regions */
-	pools = NR_POOLS;
-	if (NR_SHAPERS*SHAPER_SIZE > pools*POOL_SIZE)
-		pools = NR_SHAPERS*SHAPER_SIZE/POOL_SIZE;
-	vccs = (zatm_dev->mem-NR_SHAPERS*SHAPER_SIZE-pools*POOL_SIZE)/
-	    (2*VC_SIZE+RX_SIZE);
-	ld = -1;
-	for (rx = 1; rx < vccs; rx <<= 1) ld++;
-	dev->ci_range.vpi_bits = 0; /* @@@ no VPI for now */
-	dev->ci_range.vci_bits = ld;
-	dev->link_rate = ATM_OC3_PCR;
-	zatm_dev->chans = vccs; /* ??? */
-	curr = rx*RX_SIZE/4;
-	DPRINTK("RX pool 0x%08lx\n",curr);
-	zpokel(zatm_dev,curr,uPD98401_PMA); /* receive pool */
-	zatm_dev->pool_base = curr;
-	curr += pools*POOL_SIZE/4;
-	DPRINTK("Shapers 0x%08lx\n",curr);
-	zpokel(zatm_dev,curr,uPD98401_SMA); /* shapers */
-	curr += NR_SHAPERS*SHAPER_SIZE/4;
-	DPRINTK("Free    0x%08lx\n",curr);
-	zpokel(zatm_dev,curr,uPD98401_TOS); /* free pool */
-	printk(KERN_INFO DEV_LABEL "(itf %d): %d shapers, %d pools, %d RX, "
-	    "%ld VCs\n",dev->number,NR_SHAPERS,pools,rx,
-	    (zatm_dev->mem-curr*4)/VC_SIZE);
-	/* create mailboxes */
-	for (i = 0; i < NR_MBX; i++) {
-		void *mbx;
-		dma_addr_t mbx_dma;
-
-		if (!mbx_entries[i])
-			continue;
-		mbx = dma_alloc_coherent(&pdev->dev,
-					 2 * MBX_SIZE(i), &mbx_dma, GFP_KERNEL);
-		if (!mbx) {
-			error = -ENOMEM;
-			goto out;
-		}
-		/*
-		 * Alignment provided by dma_alloc_coherent() isn't enough
-		 * for this device.
-		 */
-		if (((unsigned long)mbx ^ mbx_dma) & 0xffff) {
-			printk(KERN_ERR DEV_LABEL "(itf %d): system "
-			       "bus incompatible with driver\n", dev->number);
-			dma_free_coherent(&pdev->dev, 2*MBX_SIZE(i), mbx, mbx_dma);
-			error = -ENODEV;
-			goto out;
-		}
-		DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i));
-		zatm_dev->mbx_start[i] = (unsigned long)mbx;
-		zatm_dev->mbx_dma[i] = mbx_dma;
-		zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) &
-					0xffff;
-		zout(mbx_dma >> 16, MSH(i));
-		zout(mbx_dma, MSL(i));
-		zout(zatm_dev->mbx_end[i], MBA(i));
-		zout((unsigned long)mbx & 0xffff, MTA(i));
-		zout((unsigned long)mbx & 0xffff, MWA(i));
-	}
-	error = start_tx(dev);
-	if (error)
-		goto out;
-	error = start_rx(dev);
-	if (error)
-		goto out_tx;
-	error = dev->phy->start(dev);
-	if (error)
-		goto out_rx;
-	zout(0xffffffff,IMR); /* enable interrupts */
-	/* enable TX & RX */
-	zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR);
-done:
-	return error;
-
-out_rx:
-	kfree(zatm_dev->rx_map);
-out_tx:
-	kfree(zatm_dev->tx_map);
-out:
-	while (i-- > 0) {
-		dma_free_coherent(&pdev->dev, 2 * MBX_SIZE(i),
-				  (void *)zatm_dev->mbx_start[i],
-				  zatm_dev->mbx_dma[i]);
-	}
-	free_irq(zatm_dev->irq, dev);
-	goto done;
-}
-
-
-static void zatm_close(struct atm_vcc *vcc)
-{
-        DPRINTK(">zatm_close\n");
-        if (!ZATM_VCC(vcc)) return;
-	clear_bit(ATM_VF_READY,&vcc->flags);
-        close_rx(vcc);
-	EVENT("close_tx\n",0,0);
-        close_tx(vcc);
-        DPRINTK("zatm_close: done waiting\n");
-        /* deallocate memory */
-        kfree(ZATM_VCC(vcc));
-	vcc->dev_data = NULL;
-	clear_bit(ATM_VF_ADDR,&vcc->flags);
-}
-
-
-static int zatm_open(struct atm_vcc *vcc)
-{
-	struct zatm_vcc *zatm_vcc;
-	short vpi = vcc->vpi;
-	int vci = vcc->vci;
-	int error;
-
-	DPRINTK(">zatm_open\n");
-	if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
-		vcc->dev_data = NULL;
-	if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
-		set_bit(ATM_VF_ADDR,&vcc->flags);
-	if (vcc->qos.aal != ATM_AAL5) return -EINVAL; /* @@@ AAL0 */
-	DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
-	    vcc->vci);
-	if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
-		zatm_vcc = kmalloc(sizeof(*zatm_vcc), GFP_KERNEL);
-		if (!zatm_vcc) {
-			clear_bit(ATM_VF_ADDR,&vcc->flags);
-			return -ENOMEM;
-		}
-		vcc->dev_data = zatm_vcc;
-		ZATM_VCC(vcc)->tx_chan = 0; /* for zatm_close after open_rx */
-		if ((error = open_rx_first(vcc))) {
-	                zatm_close(vcc);
-	                return error;
-	        }
-		if ((error = open_tx_first(vcc))) {
-			zatm_close(vcc);
-			return error;
-	        }
-	}
-	if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
-	if ((error = open_rx_second(vcc))) {
-		zatm_close(vcc);
-		return error;
-        }
-	if ((error = open_tx_second(vcc))) {
-		zatm_close(vcc);
-		return error;
-        }
-	set_bit(ATM_VF_READY,&vcc->flags);
-        return 0;
-}
-
-
-static int zatm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
-{
-	printk("Not yet implemented\n");
-	return -ENOSYS;
-	/* @@@ */
-}
-
-
-static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
-{
-	struct zatm_dev *zatm_dev;
-	unsigned long flags;
-
-	zatm_dev = ZATM_DEV(dev);
-	switch (cmd) {
-		case ZATM_GETPOOLZ:
-			if (!capable(CAP_NET_ADMIN)) return -EPERM;
-			fallthrough;
-		case ZATM_GETPOOL:
-			{
-				struct zatm_pool_info info;
-				int pool;
-
-				if (get_user(pool,
-				    &((struct zatm_pool_req __user *) arg)->pool_num))
-					return -EFAULT;
-				if (pool < 0 || pool > ZATM_LAST_POOL)
-					return -EINVAL;
-				pool = array_index_nospec(pool,
-							  ZATM_LAST_POOL + 1);
-				spin_lock_irqsave(&zatm_dev->lock, flags);
-				info = zatm_dev->pool_info[pool];
-				if (cmd == ZATM_GETPOOLZ) {
-					zatm_dev->pool_info[pool].rqa_count = 0;
-					zatm_dev->pool_info[pool].rqu_count = 0;
-				}
-				spin_unlock_irqrestore(&zatm_dev->lock, flags);
-				return copy_to_user(
-				    &((struct zatm_pool_req __user *) arg)->info,
-				    &info,sizeof(info)) ? -EFAULT : 0;
-			}
-		case ZATM_SETPOOL:
-			{
-				struct zatm_pool_info info;
-				int pool;
-
-				if (!capable(CAP_NET_ADMIN)) return -EPERM;
-				if (get_user(pool,
-				    &((struct zatm_pool_req __user *) arg)->pool_num))
-					return -EFAULT;
-				if (pool < 0 || pool > ZATM_LAST_POOL)
-					return -EINVAL;
-				pool = array_index_nospec(pool,
-							  ZATM_LAST_POOL + 1);
-				if (copy_from_user(&info,
-				    &((struct zatm_pool_req __user *) arg)->info,
-				    sizeof(info))) return -EFAULT;
-				if (!info.low_water)
-					info.low_water = zatm_dev->
-					    pool_info[pool].low_water;
-				if (!info.high_water)
-					info.high_water = zatm_dev->
-					    pool_info[pool].high_water;
-				if (!info.next_thres)
-					info.next_thres = zatm_dev->
-					    pool_info[pool].next_thres;
-				if (info.low_water >= info.high_water ||
-				    info.low_water < 0)
-					return -EINVAL;
-				spin_lock_irqsave(&zatm_dev->lock, flags);
-				zatm_dev->pool_info[pool].low_water =
-				    info.low_water;
-				zatm_dev->pool_info[pool].high_water =
-				    info.high_water;
-				zatm_dev->pool_info[pool].next_thres =
-				    info.next_thres;
-				spin_unlock_irqrestore(&zatm_dev->lock, flags);
-				return 0;
-			}
-		default:
-        		if (!dev->phy->ioctl) return -ENOIOCTLCMD;
-		        return dev->phy->ioctl(dev,cmd,arg);
-	}
-}
-
-static int zatm_send(struct atm_vcc *vcc,struct sk_buff *skb)
-{
-	int error;
-
-	EVENT(">zatm_send 0x%lx\n",(unsigned long) skb,0);
-	if (!ZATM_VCC(vcc)->tx_chan || !test_bit(ATM_VF_READY,&vcc->flags)) {
-		if (vcc->pop) vcc->pop(vcc,skb);
-		else dev_kfree_skb(skb);
-		return -EINVAL;
-	}
-	if (!skb) {
-		printk(KERN_CRIT "!skb in zatm_send ?\n");
-		if (vcc->pop) vcc->pop(vcc,skb);
-		return -EINVAL;
-	}
-	ATM_SKB(skb)->vcc = vcc;
-	error = do_tx(skb);
-	if (error != RING_BUSY) return error;
-	skb_queue_tail(&ZATM_VCC(vcc)->backlog,skb);
-	return 0;
-}
-
-
-static void zatm_phy_put(struct atm_dev *dev,unsigned char value,
-    unsigned long addr)
-{
-	struct zatm_dev *zatm_dev;
-
-	zatm_dev = ZATM_DEV(dev);
-	zwait();
-	zout(value,CER);
-	zout(uPD98401_IND_ACC | uPD98401_IA_B0 |
-	    (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
-}
-
-
-static unsigned char zatm_phy_get(struct atm_dev *dev,unsigned long addr)
-{
-	struct zatm_dev *zatm_dev;
-
-	zatm_dev = ZATM_DEV(dev);
-	zwait();
-	zout(uPD98401_IND_ACC | uPD98401_IA_B0 | uPD98401_IA_RW |
-	  (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
-	zwait();
-	return zin(CER) & 0xff;
-}
-
-
-static const struct atmdev_ops ops = {
-	.open		= zatm_open,
-	.close		= zatm_close,
-	.ioctl		= zatm_ioctl,
-	.send		= zatm_send,
-	.phy_put	= zatm_phy_put,
-	.phy_get	= zatm_phy_get,
-	.change_qos	= zatm_change_qos,
-};
-
-static int zatm_init_one(struct pci_dev *pci_dev,
-			 const struct pci_device_id *ent)
-{
-	struct atm_dev *dev;
-	struct zatm_dev *zatm_dev;
-	int ret = -ENOMEM;
-
-	zatm_dev = kmalloc(sizeof(*zatm_dev), GFP_KERNEL);
-	if (!zatm_dev) {
-		printk(KERN_EMERG "%s: memory shortage\n", DEV_LABEL);
-		goto out;
-	}
-
-	dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
-	if (!dev)
-		goto out_free;
-
-	ret = pci_enable_device(pci_dev);
-	if (ret < 0)
-		goto out_deregister;
-
-	ret = pci_request_regions(pci_dev, DEV_LABEL);
-	if (ret < 0)
-		goto out_disable;
-
-	ret = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
-	if (ret < 0)
-		goto out_release;
-
-	zatm_dev->pci_dev = pci_dev;
-	dev->dev_data = zatm_dev;
-	zatm_dev->copper = (int)ent->driver_data;
-	if ((ret = zatm_init(dev)) || (ret = zatm_start(dev)))
-		goto out_release;
-
-	pci_set_drvdata(pci_dev, dev);
-	zatm_dev->more = zatm_boards;
-	zatm_boards = dev;
-	ret = 0;
-out:
-	return ret;
-
-out_release:
-	pci_release_regions(pci_dev);
-out_disable:
-	pci_disable_device(pci_dev);
-out_deregister:
-	atm_dev_deregister(dev);
-out_free:
-	kfree(zatm_dev);
-	goto out;
-}
-
-
-MODULE_LICENSE("GPL");
-
-static const struct pci_device_id zatm_pci_tbl[] = {
-	{ PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1221), ZATM_COPPER },
-	{ PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1225), 0 },
-	{ 0, }
-};
-MODULE_DEVICE_TABLE(pci, zatm_pci_tbl);
-
-static struct pci_driver zatm_driver = {
-	.name =		DEV_LABEL,
-	.id_table =	zatm_pci_tbl,
-	.probe =	zatm_init_one,
-};
-
-static int __init zatm_init_module(void)
-{
-	return pci_register_driver(&zatm_driver);
-}
-
-module_init(zatm_init_module);
-/* module_exit not defined so not unloadable */

drivers/atm/zatm.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/* drivers/atm/zatm.h - ZeitNet ZN122x device driver declarations */
-
-/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
-
-
-#ifndef DRIVER_ATM_ZATM_H
-#define DRIVER_ATM_ZATM_H
-
-#include <linux/skbuff.h>
-#include <linux/atm.h>
-#include <linux/atmdev.h>
-#include <linux/sonet.h>
-#include <linux/pci.h>
-
-
-#define DEV_LABEL	"zatm"
-
-#define MAX_AAL5_PDU	10240	/* allocate for AAL5 PDUs of this size */
-#define MAX_RX_SIZE_LD	14	/* ceil(log2((MAX_AAL5_PDU+47)/48)) */
-
-#define LOW_MARK	12	/* start adding new buffers if less than 12 */
-#define HIGH_MARK	30	/* stop adding buffers after reaching 30 */
-#define OFF_CNG_THRES	5	/* threshold for offset changes */
-
-#define RX_SIZE		2	/* RX lookup entry size (in bytes) */
-#define NR_POOLS	32	/* number of free buffer pointers */
-#define POOL_SIZE	8	/* buffer entry size (in bytes) */
-#define NR_SHAPERS	16	/* number of shapers */
-#define SHAPER_SIZE	4	/* shaper entry size (in bytes) */
-#define VC_SIZE		32	/* VC dsc (TX or RX) size (in bytes) */
-
-#define RING_ENTRIES	32	/* ring entries (without back pointer) */
-#define RING_WORDS	4	/* ring element size */
-#define RING_SIZE	(sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS)
-
-#define NR_MBX		4	/* four mailboxes */
-#define MBX_RX_0	0	/* mailbox indices */
-#define MBX_RX_1	1
-#define MBX_TX_0	2
-#define MBX_TX_1	3
-
-struct zatm_vcc {
-	/*-------------------------------- RX part */
-	int rx_chan;			/* RX channel, 0 if none */
-	int pool;			/* free buffer pool */
-	/*-------------------------------- TX part */
-	int tx_chan;			/* TX channel, 0 if none */
-	int shaper;			/* shaper, <0 if none */
-	struct sk_buff_head tx_queue;	/* list of buffers in transit */
-	wait_queue_head_t tx_wait;	/* for close */
-	u32 *ring;			/* transmit ring */
-	int ring_curr;			/* current write position */
-	int txing;			/* number of transmits in progress */
-	struct sk_buff_head backlog;	/* list of buffers waiting for ring */
-};
-
-struct zatm_dev {
-	/*-------------------------------- TX part */
-	int tx_bw;			/* remaining bandwidth */
-	u32 free_shapers;		/* bit set */
-	int ubr;			/* UBR shaper; -1 if none */
-	int ubr_ref_cnt;		/* number of VCs using UBR shaper */
-	/*-------------------------------- RX part */
-	int pool_ref[NR_POOLS];		/* free buffer pool usage counters */
-	volatile struct sk_buff *last_free[NR_POOLS];
-					/* last entry in respective pool */
-	struct sk_buff_head pool[NR_POOLS];/* free buffer pools */
-	struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */
-	/*-------------------------------- maps */
-	struct atm_vcc **tx_map;	/* TX VCCs */
-	struct atm_vcc **rx_map;	/* RX VCCs */
-	int chans;			/* map size, must be 2^n */
-	/*-------------------------------- mailboxes */
-	unsigned long mbx_start[NR_MBX];/* start addresses */
-	dma_addr_t mbx_dma[NR_MBX];
-	u16 mbx_end[NR_MBX];		/* end offset (in bytes) */
-	/*-------------------------------- other pointers */
-	u32 pool_base;			/* Free buffer pool dsc (word addr) */
-	/*-------------------------------- ZATM links */
-	struct atm_dev *more;		/* other ZATM devices */
-	/*-------------------------------- general information */
-	int mem;			/* RAM on board (in bytes) */
-	int khz;			/* timer clock */
-	int copper;			/* PHY type */
-	unsigned char irq;		/* IRQ */
-	unsigned int base;		/* IO base address */
-	struct pci_dev *pci_dev;	/* PCI stuff */
-	spinlock_t lock;
-};
-
-
-#define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data)
-#define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data)
-
-
-struct zatm_skb_prv {
-	struct atm_skb_data _;		/* reserved */
-	u32 *dsc;			/* pointer to skb's descriptor */
-};
-
-#define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc)
-
-#endif

include/uapi/linux/atm_zatm.h

···
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* atm_zatm.h - Driver-specific declarations of the ZATM driver (for use by
-		driver-specific utilities) */
-
-/* Written 1995-1999 by Werner Almesberger, EPFL LRC/ICA */
-
-
-#ifndef LINUX_ATM_ZATM_H
-#define LINUX_ATM_ZATM_H
-
-/*
- * Note: non-kernel programs including this file must also include
- * sys/types.h for struct timeval
- */
-
-#include <linux/atmapi.h>
-#include <linux/atmioc.h>
-
-#define ZATM_GETPOOL	_IOW('a',ATMIOC_SARPRV+1,struct atmif_sioc)
-						/* get pool statistics */
-#define ZATM_GETPOOLZ	_IOW('a',ATMIOC_SARPRV+2,struct atmif_sioc)
-						/* get statistics and zero */
-#define ZATM_SETPOOL	_IOW('a',ATMIOC_SARPRV+3,struct atmif_sioc)
-						/* set pool parameters */
-
-struct zatm_pool_info {
-	int ref_count;			/* free buffer pool usage counters */
-	int low_water,high_water;	/* refill parameters */
-	int rqa_count,rqu_count;	/* queue condition counters */
-	int offset,next_off;		/* alignment optimizations: offset */
-	int next_cnt,next_thres;	/* repetition counter and threshold */
-};
-
-struct zatm_pool_req {
-	int pool_num;			/* pool number */
-	struct zatm_pool_info info;	/* actual information */
-};
-
-#define ZATM_OAM_POOL		0	/* free buffer pool for OAM cells */
-#define ZATM_AAL0_POOL		1	/* free buffer pool for AAL0 cells */
-#define ZATM_AAL5_POOL_BASE	2	/* first AAL5 free buffer pool */
-#define ZATM_LAST_POOL	ZATM_AAL5_POOL_BASE+10 /* max. 64 kB */
-
-#define ZATM_TIMER_HISTORY_SIZE	16	/* number of timer adjustments to
-					   record; must be 2^n */
-
-#endif