* DMA now uses get_free_page as kmalloc buffers may span a 64K
* boundary.
*
- * Modified for SMP safety and SMP locking by Alan Cox <alan@redhat.com>
+ * Modified for SMP safety and SMP locking by Alan Cox
+ * <alan@lxorguk.ukuu.org.uk>
*
* Performance
*
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/delay.h>
+#include <linux/hdlc.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <asm/dma.h>
#define RT_UNLOCK
#include <linux/spinlock.h>
-#include <net/syncppp.h>
#include "z85230.h"
static void z8530_rx(struct z8530_channel *c)
{
u8 ch,stat;
- spin_lock(c->lock);
-
+
while(1)
{
/* FIFO empty ? */
*/
write_zsctrl(c, ERR_RES);
write_zsctrl(c, RES_H_IUS);
- spin_unlock(c->lock);
}
static void z8530_tx(struct z8530_channel *c)
{
- spin_lock(c->lock);
while(c->txcount) {
/* FIFO full ? */
if(!(read_zsreg(c, R0)&4))
- break;
+ return;
c->txcount--;
/*
* Shovel out the byte
z8530_tx_done(c);
write_zsctrl(c, RES_H_IUS);
- spin_unlock(c->lock);
}
/**
* A status event occurred in PIO synchronous mode. There are several
* reasons the chip will bother us here. A transmit underrun means we
* failed to feed the chip fast enough and just broke a packet. A DCD
- * change is a line up or down. We communicate that back to the protocol
- * layer for synchronous PPP to renegotiate.
+ * change is a line up or down.
*/
static void z8530_status(struct z8530_channel *chan)
{
u8 status, altered;
- spin_lock(chan->lock);
- status=read_zsreg(chan, R0);
- altered=chan->status^status;
-
- chan->status=status;
-
- if(status&TxEOM)
- {
+ status = read_zsreg(chan, R0);
+ altered = chan->status ^ status;
+
+ chan->status = status;
+
+ if (status & TxEOM) {
/* printk("%s: Tx underrun.\n", chan->dev->name); */
- chan->stats.tx_fifo_errors++;
+ chan->netdevice->stats.tx_fifo_errors++;
write_zsctrl(chan, ERR_RES);
z8530_tx_done(chan);
}
-
- if(altered&chan->dcdcheck)
+
+ if (altered & chan->dcdcheck)
{
- if(status&chan->dcdcheck)
- {
+ if (status & chan->dcdcheck) {
printk(KERN_INFO "%s: DCD raised\n", chan->dev->name);
- write_zsreg(chan, R3, chan->regs[3]|RxENABLE);
- if(chan->netdevice &&
- ((chan->netdevice->type == ARPHRD_HDLC) ||
- (chan->netdevice->type == ARPHRD_PPP)))
- sppp_reopen(chan->netdevice);
- }
- else
- {
+ write_zsreg(chan, R3, chan->regs[3] | RxENABLE);
+ if (chan->netdevice)
+ netif_carrier_on(chan->netdevice);
+ } else {
printk(KERN_INFO "%s: DCD lost\n", chan->dev->name);
- write_zsreg(chan, R3, chan->regs[3]&~RxENABLE);
+ write_zsreg(chan, R3, chan->regs[3] & ~RxENABLE);
z8530_flush_fifo(chan);
+ if (chan->netdevice)
+ netif_carrier_off(chan->netdevice);
}
-
- }
+
+ }
write_zsctrl(chan, RES_EXT_INT);
write_zsctrl(chan, RES_H_IUS);
- spin_unlock(chan->lock);
}
-struct z8530_irqhandler z8530_sync=
+struct z8530_irqhandler z8530_sync =
{
z8530_rx,
z8530_tx,
static void z8530_dma_rx(struct z8530_channel *chan)
{
- spin_lock(chan->lock);
if(chan->rxdma_on)
{
/* Special condition check only */
/* DMA is off right now, drain the slow way */
z8530_rx(chan);
}
- spin_unlock(chan->lock);
}
/**
static void z8530_dma_tx(struct z8530_channel *chan)
{
- spin_lock(chan->lock);
if(!chan->dma_tx)
{
printk(KERN_WARNING "Hey who turned the DMA off?\n");
/* This shouldnt occur in DMA mode */
printk(KERN_ERR "DMA tx - bogus event!\n");
z8530_tx(chan);
- spin_unlock(chan->lock);
}
/**
*
* A status event occurred on the Z8530. We receive these for two reasons
* when in DMA mode. Firstly if we finished a packet transfer we get one
- * and kick the next packet out. Secondly we may see a DCD change and
- * have to poke the protocol layer.
+ * and kick the next packet out. Secondly we may see a DCD change.
*
*/
}
}
- spin_lock(chan->lock);
- if(altered&chan->dcdcheck)
+ if (altered & chan->dcdcheck)
{
- if(status&chan->dcdcheck)
- {
+ if (status & chan->dcdcheck) {
printk(KERN_INFO "%s: DCD raised\n", chan->dev->name);
- write_zsreg(chan, R3, chan->regs[3]|RxENABLE);
- if(chan->netdevice &&
- ((chan->netdevice->type == ARPHRD_HDLC) ||
- (chan->netdevice->type == ARPHRD_PPP)))
- sppp_reopen(chan->netdevice);
- }
- else
- {
+ write_zsreg(chan, R3, chan->regs[3] | RxENABLE);
+ if (chan->netdevice)
+ netif_carrier_on(chan->netdevice);
+ } else {
printk(KERN_INFO "%s:DCD lost\n", chan->dev->name);
- write_zsreg(chan, R3, chan->regs[3]&~RxENABLE);
+ write_zsreg(chan, R3, chan->regs[3] & ~RxENABLE);
z8530_flush_fifo(chan);
+ if (chan->netdevice)
+ netif_carrier_off(chan->netdevice);
}
- }
+ }
write_zsctrl(chan, RES_EXT_INT);
write_zsctrl(chan, RES_H_IUS);
- spin_unlock(chan->lock);
}
struct z8530_irqhandler z8530_dma_sync=
* channel). c->lock for both channels points to dev->lock
*/
-irqreturn_t z8530_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t z8530_interrupt(int irq, void *dev_id)
{
struct z8530_dev *dev=dev_id;
u8 intr;
/*
* Check if we crapped out.
*/
- if(get_dma_residue(c->txdma))
+ if (get_dma_residue(c->txdma))
{
- c->stats.tx_dropped++;
- c->stats.tx_fifo_errors++;
+ c->netdevice->stats.tx_dropped++;
+ c->netdevice->stats.tx_fifo_errors++;
}
release_dma_lock(flags);
}
* packet. This code is fairly timing sensitive.
*
* Called with the register lock held.
- */
-
+ */
+
static void z8530_tx_done(struct z8530_channel *c)
{
struct sk_buff *skb;
/* Actually this can happen.*/
- if(c->tx_skb==NULL)
+ if (c->tx_skb == NULL)
return;
- skb=c->tx_skb;
- c->tx_skb=NULL;
+ skb = c->tx_skb;
+ c->tx_skb = NULL;
z8530_tx_begin(c);
- c->stats.tx_packets++;
- c->stats.tx_bytes+=skb->len;
+ c->netdevice->stats.tx_packets++;
+ c->netdevice->stats.tx_bytes += skb->len;
dev_kfree_skb_irq(skb);
}
* @skb: The buffer
*
* We point the receive handler at this function when idle. Instead
- * of syncppp processing the frames we get to throw them away.
+ * of processing the frames we get to throw them away.
*/
void z8530_null_rx(struct z8530_channel *c, struct sk_buff *skb)
else
/* Can't occur as we dont reenable the DMA irq until
after the flip is done */
- printk(KERN_WARNING "%s: DMA flip overrun!\n", c->netdevice->name);
-
+ printk(KERN_WARNING "%s: DMA flip overrun!\n",
+ c->netdevice->name);
+
release_dma_lock(flags);
-
+
/*
* Shove the old buffer into an sk_buff. We can't DMA
* directly into one on a PC - it might be above the 16Mb
* can avoid the copy. Optimisation 2 - make the memcpy
* a copychecksum.
*/
-
- skb=dev_alloc_skb(ct);
- if(skb==NULL)
- {
- c->stats.rx_dropped++;
- printk(KERN_WARNING "%s: Memory squeeze.\n", c->netdevice->name);
- }
- else
- {
+
+ skb = dev_alloc_skb(ct);
+ if (skb == NULL) {
+ c->netdevice->stats.rx_dropped++;
+ printk(KERN_WARNING "%s: Memory squeeze.\n",
+ c->netdevice->name);
+ } else {
skb_put(skb, ct);
- memcpy(skb->data, rxb, ct);
- c->stats.rx_packets++;
- c->stats.rx_bytes+=ct;
+ skb_copy_to_linear_data(skb, rxb, ct);
+ c->netdevice->stats.rx_packets++;
+ c->netdevice->stats.rx_bytes += ct;
}
- c->dma_ready=1;
- }
- else
- {
- RT_LOCK;
- skb=c->skb;
-
+ c->dma_ready = 1;
+ } else {
+ RT_LOCK;
+ skb = c->skb;
+
/*
* The game we play for non DMA is similar. We want to
* get the controller set up for the next packet as fast
* if you build a system where the sync irq isnt blocked
* by the kernel IRQ disable then you need only block the
* sync IRQ for the RT_LOCK area.
- *
+ *
*/
ct=c->count;
-
+
c->skb = c->skb2;
c->count = 0;
c->max = c->mtu;
- if(c->skb)
- {
+ if (c->skb) {
c->dptr = c->skb->data;
c->max = c->mtu;
- }
- else
- {
- c->count= 0;
+ } else {
+ c->count = 0;
c->max = 0;
}
RT_UNLOCK;
c->skb2 = dev_alloc_skb(c->mtu);
- if(c->skb2==NULL)
+ if (c->skb2 == NULL)
printk(KERN_WARNING "%s: memory squeeze.\n",
- c->netdevice->name);
+ c->netdevice->name);
else
- {
- skb_put(c->skb2,c->mtu);
- }
- c->stats.rx_packets++;
- c->stats.rx_bytes+=ct;
-
+ skb_put(c->skb2, c->mtu);
+ c->netdevice->stats.rx_packets++;
+ c->netdevice->stats.rx_bytes += ct;
}
/*
* If we received a frame we must now process it.
*/
- if(skb)
- {
+ if (skb) {
skb_trim(skb, ct);
- c->rx_function(c,skb);
- }
- else
- {
- c->stats.rx_dropped++;
+ c->rx_function(c, skb);
+ } else {
+ c->netdevice->stats.rx_dropped++;
printk(KERN_ERR "%s: Lost a frame\n", c->netdevice->name);
}
}
* Returns true if the buffer cross a DMA boundary on a PC. The poor
* thing can only DMA within a 64K block not across the edges of it.
*/
-
+
static inline int spans_boundary(struct sk_buff *skb)
{
unsigned long a=(unsigned long)skb->data;
*/
c->tx_next_ptr=c->tx_dma_buf[c->tx_dma_used];
c->tx_dma_used^=1; /* Flip temp buffer */
- memcpy(c->tx_next_ptr, skb->data, skb->len);
+ skb_copy_from_linear_data(skb, c->tx_next_ptr, skb->len);
}
else
c->tx_next_ptr=skb->data;
EXPORT_SYMBOL(z8530_queue_xmit);
-/**
- * z8530_get_stats - Get network statistics
- * @c: The channel to use
- *
- * Get the statistics block. We keep the statistics in software as
- * the chip doesn't do it for us.
- *
- * Locking is ignored here - we could lock for a copy but its
- * not likely to be that big an issue
- */
-
-struct net_device_stats *z8530_get_stats(struct z8530_channel *c)
-{
- return &c->stats;
-}
-
-EXPORT_SYMBOL(z8530_get_stats);
-
/*
* Module support
*/
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff