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Code

Working korina driver for 2.6.24, still needs fixing in the tx tasklet which introduces high latency when transmitting packets, rx path works ok

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11853 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
florian 2008-07-17 10:09:15 +00:00
parent 46860d789c
commit e35ac592ae
1 changed files with 37 additions and 47 deletions
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76
target/linux/rb532/files-2.6.24/drivers/net/korina.c
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@ -627,14 +627,12 @@ rc32434_rx_dma_interrupt(int irq, void *dev_id)
lp = (struct rc32434_local *)dev->priv;
spin_lock(&lp->lock);
dmas = __raw_readl(&lp->rx_dma_regs->dmas);
if(dmas & (DMAS_d_m|DMAS_h_m|DMAS_e_m)) {
/* Mask D H E bit in Rx DMA */
dmasm = __raw_readl(&lp->rx_dma_regs->dmasm);
__raw_writel(dmasm | (DMASM_d_m | DMASM_h_m | DMASM_e_m), &lp->rx_dma_regs->dmasm);
netif_rx_schedule_prep(dev, &lp->napi);
netif_rx_schedule(dev, &lp->napi);
if (dmas & DMAS_e_m)
ERR(": DMA error\n");
@ -644,39 +642,29 @@ rc32434_rx_dma_interrupt(int irq, void *dev_id)
else
retval = IRQ_NONE;
spin_unlock(&lp->lock);
return retval;
}
static int rc32434_poll(struct napi_struct *napi, int budget)
static int rc32434_rx(struct net_device *dev, int limit)
{
struct rc32434_local* lp = container_of(napi, struct rc32434_local, napi);
struct net_device *dev = lp->dev;
struct rc32434_local *lp = netdev_priv(dev);
volatile DMAD_t rd = &lp->rd_ring[lp->rx_next_done];
struct sk_buff *skb, *skb_new;
u8 *pkt_buf;
u32 devcs, count, pkt_len, pktuncrc_len;
volatile u32 dmas;
u32 received = 0;
int rx_work_limit = min(budget, 64);
u32 devcs, pkt_len, dmas, rx_free_desc;
u32 pktuncrc_len;
int count;
dma_cache_inv((u32)rd, sizeof(*rd));
while ( (count = RC32434_RBSIZE - (u32)DMA_COUNT(rd->control)) != 0) {
if(--rx_work_limit <0)
{
break;
}
for (count = 0; count < limit; count++) {
/* init the var. used for the later operations within the while loop */
skb_new = NULL;
devcs = rd->devcs;
pkt_len = RCVPKT_LENGTH(devcs);
skb = lp->rx_skb[lp->rx_next_done];
if (count < 64) {
lp->stats.rx_errors++;
lp->stats.rx_dropped++;
}
else if ((devcs & ( ETHRX_ld_m)) != ETHRX_ld_m) {
if ((devcs & ( ETHRX_ld_m)) != ETHRX_ld_m) {
/* check that this is a whole packet */
/* WARNING: DMA_FD bit incorrectly set in Rc32434 (errata ref #077) */
lp->stats.rx_errors++;
@ -684,7 +672,6 @@ static int rc32434_poll(struct napi_struct *napi, int budget)
}
else if ( (devcs & ETHRX_rok_m) ) {
{
/* must be the (first and) last descriptor then */
pkt_buf = (u8*)lp->rx_skb[lp->rx_next_done]->data;
@ -693,7 +680,7 @@ static int rc32434_poll(struct napi_struct *napi, int budget)
dma_cache_inv((unsigned long)pkt_buf, pktuncrc_len);
/* Malloc up new buffer. */
skb_new = dev_alloc_skb(RC32434_RBSIZE + 2);
skb_new = netdev_alloc_skb(dev, RC32434_RBSIZE + 2);
if (skb_new != NULL){
/* Make room */
@ -723,8 +710,6 @@ static int rc32434_poll(struct napi_struct *napi, int budget)
lp->stats.rx_dropped++;
}
}
}
else {
/* This should only happen if we enable accepting broken packets */
lp->stats.rx_errors++;
@ -755,12 +740,12 @@ static int rc32434_poll(struct napi_struct *napi, int budget)
DBG(2, "RX Preamble error\n");
}
}
rd->devcs = 0;
/* restore descriptor's curr_addr */
if(skb_new)
if(skb_new) {
rd->ca = CPHYSADDR(skb_new->data);
}
else
rd->ca = CPHYSADDR(skb->data);
@ -772,13 +757,11 @@ static int rc32434_poll(struct napi_struct *napi, int budget)
rd = &lp->rd_ring[lp->rx_next_done];
__raw_writel( ~DMAS_d_m, &lp->rx_dma_regs->dmas);
}
budget =- received;
if(rx_work_limit < 0)
goto not_done;
dmas = __raw_readl(&lp->rx_dma_regs->dmas);
if(dmas & DMAS_h_m) {
/* Mask off halt and error bits */
__raw_writel( ~(DMAS_h_m | DMAS_e_m), &lp->rx_dma_regs->dmas);
#ifdef RC32434_PROC_DEBUG
lp->dma_halt_cnt++;
@ -790,12 +773,26 @@ static int rc32434_poll(struct napi_struct *napi, int budget)
rc32434_chain_rx(lp,rd);
}
netif_rx_complete(dev, &lp->napi);
/* Enable D H E bit in Rx DMA */
__raw_writel(__raw_readl(&lp->rx_dma_regs->dmasm) & ~(DMASM_d_m | DMASM_h_m |DMASM_e_m), &lp->rx_dma_regs->dmasm);
return 0;
not_done:
return 1;
return count;
}
static int rc32434_poll(struct napi_struct *napi, int budget)
{
struct rc32434_local *lp =
container_of(napi, struct rc32434_local, napi);
struct net_device *dev = lp->dev;
int work_done;
work_done = rc32434_rx(dev, budget);
if (work_done < budget) {
netif_rx_complete(dev, napi);
/* Mask off interrupts */
writel(readl(&lp->rx_dma_regs->dmasm) &
(DMASM_d_m | DMASM_h_m |DMASM_e_m),
&lp->rx_dma_regs->dmasm);
}
return work_done;
}
@ -813,8 +810,6 @@ rc32434_tx_dma_interrupt(int irq, void *dev_id)
lp = (struct rc32434_local *)dev->priv;
spin_lock(&lp->lock);
dmas = __raw_readl(&lp->tx_dma_regs->dmas);
if (dmas & (DMAS_f_m | DMAS_e_m)) {
@ -839,8 +834,6 @@ rc32434_tx_dma_interrupt(int irq, void *dev_id)
else
retval = IRQ_NONE;
spin_unlock(&lp->lock);
return retval;
}
@ -995,9 +988,6 @@ static int rc32434_init(struct net_device *dev)
/* Enable Ethernet Interface */
__raw_writel(ETHINTFC_en_m, &lp->eth_regs->ethintfc);
#ifndef CONFIG_IDT_USE_NAPI
tasklet_disable(lp->rx_tasklet);
#endif
tasklet_disable(lp->tx_tasklet);
/* Initialize the transmit Descriptors */