// 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 */
|
