void ether00_mem_update(void* dev_id)
{
struct net_device* dev=dev_id;
struct net_priv* priv=dev->priv;
struct sk_buff* skb;
struct tx_fda_ent *fda_ptr=priv->tx_fdalist_vp;
struct rx_blist_ent* blist_ent_ptr;
unsigned long flags;
priv->tq_memupdate.sync=0;
//priv->tq_memupdate.list=
priv->memupdate_scheduled=0;
/* Transmit interrupt */
while(fda_ptr<(priv->tx_fdalist_vp+TX_NUM_FDESC)){
if(!(FDCTL_COWNSFD_MSK&fda_ptr->fd.FDCtl) && (ETHER_TX_STAT_COMP_MSK&fda_ptr->fd.FDStat)){
priv->stats.tx_packets++;
priv->stats.tx_bytes+=fda_ptr->bd.BuffLength;
skb=(struct sk_buff*)fda_ptr->fd.FDSystem;
//printk("%d:txcln:fda=%#x skb=%#x\n",jiffies,fda_ptr,skb);
dev_kfree_skb(skb);
fda_ptr->fd.FDSystem=0;
fda_ptr->fd.FDStat=0;
fda_ptr->fd.FDCtl=0;
}
fda_ptr++;
}
/* Fill in any missing buffers from the received queue */
spin_lock_irqsave(&priv->rx_lock,flags);
blist_ent_ptr=priv->rx_blist_vp;
while(blist_ent_ptr<(priv->rx_blist_vp+RX_NUM_BUFF)){
/* fd.FDSystem of 0 indicates we failed to allocate the buffer in the ISR */
if(!blist_ent_ptr->fd.FDSystem){
struct sk_buff *skb;
skb=dev_alloc_skb(PKT_BUF_SZ);
blist_ent_ptr->fd.FDSystem=(unsigned int)skb;
if(skb){
setup_blist_entry(skb,blist_ent_ptr);
}
else
{
break;
}
}
blist_ent_ptr++;
}
spin_unlock_irqrestore(&priv->rx_lock,flags);
if(priv->queue_stopped){
//printk("%d:cln:start q\n",jiffies);
netif_start_queue(dev);
}
if(priv->rx_disabled){
//printk("%d:enable_irq\n",jiffies);
priv->rx_disabled=0;
writel(ETHER_RX_CTL_RXEN_MSK,ETHER_RX_CTL(dev->base_addr));
}
}
void ether00_mem_update(void* dev_id)
{
struct net_device* dev=dev_id;
struct net_priv* priv=dev->priv;
struct rx_blist_ent* blist_ent_ptr;
unsigned long flags;
int enable_rx = 0;
priv->tq_memupdate.sync=0;
priv->memupdate_scheduled=0;
/* Fill in any missing buffers from the received queue */
blist_ent_ptr=priv->rx_blist_vp;
while(blist_ent_ptr<(priv->rx_blist_vp+RX_NUM_BUFF)){
spin_lock_irqsave(&priv->dma_lock,flags);
/* fd.FDSystem of 0 indicates we failed to allocate the buffer in the ISR */
if(!blist_ent_ptr->fd.FDSystem){
struct sk_buff *skb;
skb=dev_alloc_skb(PKT_BUF_SZ);
blist_ent_ptr->fd.FDSystem=(unsigned int)skb;
if(skb){
setup_blist_entry(skb,blist_ent_ptr);
enable_rx = 1;
}
else
{
/*
* reschedule the clean up, since we
* didn't patch up all the buffers
*/
if(!priv->memupdate_scheduled){
schedule_task(&priv->tq_memupdate);
priv->memupdate_scheduled=1;
}
spin_unlock_irqrestore(&priv->dma_lock,flags);
break;
}
}
spin_unlock_irqrestore(&priv->dma_lock,flags);
blist_ent_ptr++;
}
if(enable_rx){
if (!priv->rx_disabled){
priv->rx_disabled = 0;
writel(ETHER_RX_CTL_RXEN_MSK,ETHER_RX_CTL(dev->base_addr));
}
}
}
static void ether00_int( int irq_num, void* dev_id, struct pt_regs* regs)
{
struct net_device* dev=dev_id;
struct net_priv* priv=dev->priv;
unsigned int interruptValue;
interruptValue=readl(ETHER_INT_SRC(dev->base_addr));
//printk("INT_SRC=%x\n",interruptValue);
if(!(readl(ETHER_INT_SRC(dev->base_addr)) & ETHER_INT_SRC_IRQ_MSK))
{
return; /* Interrupt wasn't caused by us!! */
}
if(readl(ETHER_INT_SRC(dev->base_addr))&
(ETHER_INT_SRC_INTMACRX_MSK |
ETHER_INT_SRC_FDAEX_MSK |
ETHER_INT_SRC_BLEX_MSK)) {
struct rx_blist_ent* blist_ent_ptr;
struct rx_fda_ent* fda_ent_ptr;
struct sk_buff* skb;
fda_ent_ptr=priv->rx_fda_ptr;
spin_lock(&priv->rx_lock);
while(fda_ent_ptr<(priv->rx_fda_ptr+RX_NUM_FDESC)){
int result;
if(!(fda_ent_ptr->fd.FDCtl&FDCTL_COWNSFD_MSK))
{
/* This frame is ready for processing */
/*find the corresponding buffer in the bufferlist */
blist_ent_ptr=priv->rx_blist_vp+fda_ent_ptr->bd.BDStat;
skb=(struct sk_buff*)blist_ent_ptr->fd.FDSystem;
/* Pass this skb up the stack */
skb->dev=dev;
skb_put(skb,fda_ent_ptr->fd.FDLength);
skb->protocol=eth_type_trans(skb,dev);
skb->ip_summed=CHECKSUM_UNNECESSARY;
result=netif_rx(skb);
/* Update statistics */
priv->stats.rx_packets++;
priv->stats.rx_bytes+=fda_ent_ptr->fd.FDLength;
/* Free the FDA entry */
fda_ent_ptr->bd.BDStat=0xff;
fda_ent_ptr->fd.FDCtl=FDCTL_COWNSFD_MSK;
/* Allocate a new skb and point the bd entry to it */
blist_ent_ptr->fd.FDSystem=0;
skb=dev_alloc_skb(PKT_BUF_SZ);
//printk("allocskb=%#x\n",skb);
if(skb){
setup_blist_entry(skb,blist_ent_ptr);
}
else if(!priv->memupdate_scheduled){
int tmp;
/* There are no buffers at the moment, so schedule */
/* the background task to sort this out */
schedule_task(&priv->tq_memupdate);
priv->memupdate_scheduled=1;
printk(KERN_DEBUG "%s:No buffers",dev->name);
/* If this interrupt was due to a lack of buffers then
* we'd better stop the receiver too */
if(interruptValueÐER_INT_SRC_BLEX_MSK){
priv->rx_disabled=1;
tmp=readl(ETHER_INT_SRC(dev->base_addr));
writel(tmp&~ETHER_RX_CTL_RXEN_MSK,ETHER_RX_CTL(dev->base_addr));
printk(KERN_DEBUG "%s:Halting rx",dev->name);
}
}
}
fda_ent_ptr++;
}
spin_unlock(&priv->rx_lock);
/* Clear the interrupts */
writel(ETHER_INT_SRC_INTMACRX_MSK | ETHER_INT_SRC_FDAEX_MSK
| ETHER_INT_SRC_BLEX_MSK,ETHER_INT_SRC(dev->base_addr));
}
if(readl(ETHER_INT_SRC(dev->base_addr))ÐER_INT_SRC_INTMACTX_MSK){
if(!priv->memupdate_scheduled){
schedule_task(&priv->tq_memupdate);
priv->memupdate_scheduled=1;
}
/* Clear the interrupt */
writel(ETHER_INT_SRC_INTMACTX_MSK,ETHER_INT_SRC(dev->base_addr));
}
if (readl(ETHER_INT_SRC(dev->base_addr)) & (ETHER_INT_SRC_SWINT_MSK|
ETHER_INT_SRC_INTEARNOT_MSK|
ETHER_INT_SRC_INTLINK_MSK|
ETHER_INT_SRC_INTEXBD_MSK|
ETHER_INT_SRC_INTTXCTLCMP_MSK))
{
/*
* Not using any of these so they shouldn't happen
*
* In the cased of INTEXBD - if you allocate more
* than 28 decsriptors you may need to think about this
*/
printk("Not using this interrupt\n");
}
if (readl(ETHER_INT_SRC(dev->base_addr)) &
(ETHER_INT_SRC_INTSBUS_MSK |
ETHER_INT_SRC_INTNRABT_MSK
|ETHER_INT_SRC_DMPARERR_MSK))
{
/*
* Hardware errors, we can either ignore them and hope they go away
*or reset the device, I'll try the first for now to see if they happen
*/
printk("Hardware error\n");
}
}
static int ether00_mem_init(struct net_device* dev)
{
struct net_priv* priv=dev->priv;
struct tx_fda_ent *tx_fd_ptr,*tx_end_ptr;
struct rx_blist_ent* blist_ent_ptr;
int i;
/*
* Grab a block of on chip SRAM to contain the control stuctures for
* the ethernet MAC. This uncached becuase it needs to be accesses by both
* bus masters (cpu + mac). However, it shouldn't matter too much in terms
* of speed as its on chip memory
*/
priv->dma_data=ioremap_nocache(EXC_SPSRAM_BLOCK0_BASE,EXC_SPSRAM_BLOCK0_SIZE );
if (!priv->dma_data)
return -ENOMEM;
priv->rx_fda_ptr=(struct rx_fda_ent*)priv->dma_data;
/*
* Now share it out amongst the Frame descriptors and the buffer list
*/
priv->rx_blist_vp=(struct rx_blist_ent*)((unsigned int)priv->dma_data+RX_NUM_FDESC*sizeof(struct rx_fda_ent));
/*
*Initalise the FDA list
*/
/* set ownership to the controller */
memset(priv->rx_fda_ptr,0x80,RX_NUM_FDESC*sizeof(struct rx_fda_ent));
/*
*Initialise the buffer list
*/
blist_ent_ptr=priv->rx_blist_vp;
i=0;
while(blist_ent_ptr<(priv->rx_blist_vp+RX_NUM_BUFF)){
struct sk_buff *skb;
blist_ent_ptr->fd.FDLength=1;
skb=dev_alloc_skb(PKT_BUF_SZ);
if(skb){
setup_blist_entry(skb,blist_ent_ptr);
blist_ent_ptr->fd.FDNext=(FDA_DESC*)__dma_pa(blist_ent_ptr+1);
blist_ent_ptr->bd.BDStat=i++;
blist_ent_ptr++;
}
else
{
printk("Failed to initalise buffer list\n");
}
}
blist_ent_ptr--;
blist_ent_ptr->fd.FDNext=(FDA_DESC*)__dma_pa(priv->rx_blist_vp);
priv->tx_fdalist_vp=(struct tx_fda_ent*)(priv->rx_blist_vp+RX_NUM_BUFF);
/* Initialise the buffers to be a circular list. The mac will then go poll
* the list until it finds a frame ready to transmit */
tx_end_ptr=priv->tx_fdalist_vp+TX_NUM_FDESC;
for(tx_fd_ptr=priv->tx_fdalist_vp;tx_fd_ptr<tx_end_ptr;tx_fd_ptr++){
tx_fd_ptr->fd.FDNext=(FDA_DESC*)__dma_pa((tx_fd_ptr+1));
tx_fd_ptr->fd.FDCtl=1;
tx_fd_ptr->fd.FDStat=0;
tx_fd_ptr->fd.FDLength=1;
}
/* Change the last FDNext pointer to make a circular list */
tx_fd_ptr--;
tx_fd_ptr->fd.FDNext=(FDA_DESC*)__dma_pa(priv->tx_fdalist_vp);
/* Point the device at the chain of Rx and Tx Buffers */
writel((unsigned int)__dma_pa(priv->rx_fda_ptr),ETHER_FDA_BAS(dev->base_addr));
writel((RX_NUM_FDESC-1)*sizeof(struct rx_fda_ent),ETHER_FDA_LIM(dev->base_addr));
writel((unsigned int)__dma_pa(priv->rx_blist_vp),ETHER_BLFRMPTR(dev->base_addr));
writel((unsigned int)__dma_pa(priv->tx_fdalist_vp),ETHER_TXFRMPTR(dev->base_addr));
return 0;
}
