/**
* usb_buffer_dmasync - synchronize DMA and CPU view of buffer(s)
* @urb: urb whose transfer_buffer/setup_packet will be synchronized
*/
void usb_buffer_dmasync(struct urb *urb)
{
struct usb_bus *bus;
struct device *controller;
if (!urb
|| !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
|| !urb->dev
|| !(bus = urb->dev->bus)
|| !(controller = bus->controller))
return;
if (controller->dma_mask) {
dma_sync_single(controller,
urb->transfer_dma, urb->transfer_buffer_length,
usb_pipein(urb->pipe)
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
if (usb_pipecontrol(urb->pipe))
dma_sync_single(controller,
urb->setup_dma,
sizeof(struct usb_ctrlrequest),
DMA_TO_DEVICE);
}
}
static int eth_poll(struct napi_struct *napi, int budget)
{
struct port *port = container_of(napi, struct port, napi);
struct net_device *dev = port->netdev;
unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
int received = 0;
#if DEBUG_RX
printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
#endif
while (received < budget) {
struct sk_buff *skb;
struct desc *desc;
int n;
#ifdef __ARMEB__
struct sk_buff *temp;
u32 phys;
#endif
if ((n = queue_get_desc(rxq, port, 0)) < 0) {
#if DEBUG_RX
printk(KERN_DEBUG "%s: eth_poll napi_complete\n",
dev->name);
#endif
napi_complete(napi);
qmgr_enable_irq(rxq);
if (!qmgr_stat_empty(rxq) &&
napi_reschedule(napi)) {
#if DEBUG_RX
printk(KERN_DEBUG "%s: eth_poll"
" napi_reschedule successed\n",
dev->name);
#endif
qmgr_disable_irq(rxq);
continue;
}
#if DEBUG_RX
printk(KERN_DEBUG "%s: eth_poll all done\n",
dev->name);
#endif
return received; /* all work done */
}
desc = rx_desc_ptr(port, n);
#ifdef __ARMEB__
if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
phys = dma_map_single(&dev->dev, skb->data,
RX_BUFF_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(&dev->dev, phys)) {
dev_kfree_skb(skb);
skb = NULL;
}
}
#else
skb = netdev_alloc_skb(dev,
ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
#endif
if (!skb) {
dev->stats.rx_dropped++;
/* put the desc back on RX-ready queue */
desc->buf_len = MAX_MRU;
desc->pkt_len = 0;
queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
continue;
}
/* process received frame */
#ifdef __ARMEB__
temp = skb;
skb = port->rx_buff_tab[n];
dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
RX_BUFF_SIZE, DMA_FROM_DEVICE);
#else
dma_sync_single(&dev->dev, desc->data - NET_IP_ALIGN,
RX_BUFF_SIZE, DMA_FROM_DEVICE);
memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
#endif
skb_reserve(skb, NET_IP_ALIGN);
skb_put(skb, desc->pkt_len);
debug_pkt(dev, "eth_poll", skb->data, skb->len);
skb->protocol = eth_type_trans(skb, dev);
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
netif_receive_skb(skb);
/* put the new buffer on RX-free queue */
#ifdef __ARMEB__
port->rx_buff_tab[n] = temp;
desc->data = phys + NET_IP_ALIGN;
#endif
desc->buf_len = MAX_MRU;
desc->pkt_len = 0;
queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
received++;
}
#if DEBUG_RX
printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
#endif
return received; /* not all work done */
}
static int hss_hdlc_poll(struct napi_struct *napi, int budget)
{
struct port *port = container_of(napi, struct port, napi);
struct net_device *dev = port->netdev;
unsigned int rxq = queue_ids[port->id].rx;
unsigned int rxfreeq = queue_ids[port->id].rxfree;
int received = 0;
#if DEBUG_RX
printk(KERN_DEBUG "%s: hss_hdlc_poll\n", dev->name);
#endif
while (received < budget) {
struct sk_buff *skb;
struct desc *desc;
int n;
#ifdef __ARMEB__
struct sk_buff *temp;
u32 phys;
#endif
if ((n = queue_get_desc(rxq, port, 0)) < 0) {
#if DEBUG_RX
printk(KERN_DEBUG "%s: hss_hdlc_poll"
" netif_rx_complete\n", dev->name);
#endif
netif_rx_complete(napi);
qmgr_enable_irq(rxq);
if (!qmgr_stat_empty(rxq) &&
netif_rx_reschedule(napi)) {
#if DEBUG_RX
printk(KERN_DEBUG "%s: hss_hdlc_poll"
" netif_rx_reschedule succeeded\n",
dev->name);
#endif
qmgr_disable_irq(rxq);
continue;
}
#if DEBUG_RX
printk(KERN_DEBUG "%s: hss_hdlc_poll all done\n",
dev->name);
#endif
return received; /* all work done */
}
desc = rx_desc_ptr(port, n);
#if 0 /* FIXME - error_count counts modulo 256, perhaps we should use it */
if (desc->error_count)
printk(KERN_DEBUG "%s: hss_hdlc_poll status 0x%02X"
" errors %u\n", dev->name, desc->status,
desc->error_count);
#endif
skb = NULL;
switch (desc->status) {
case 0:
#ifdef __ARMEB__
if ((skb = netdev_alloc_skb(dev, RX_SIZE)) != NULL) {
phys = dma_map_single(&dev->dev, skb->data,
RX_SIZE,
DMA_FROM_DEVICE);
if (dma_mapping_error(&dev->dev, phys)) {
dev_kfree_skb(skb);
skb = NULL;
}
}
#else
skb = netdev_alloc_skb(dev, desc->pkt_len);
#endif
if (!skb)
dev->stats.rx_dropped++;
break;
case ERR_HDLC_ALIGN:
case ERR_HDLC_ABORT:
dev->stats.rx_frame_errors++;
dev->stats.rx_errors++;
break;
case ERR_HDLC_FCS:
dev->stats.rx_crc_errors++;
dev->stats.rx_errors++;
break;
case ERR_HDLC_TOO_LONG:
dev->stats.rx_length_errors++;
dev->stats.rx_errors++;
break;
default: /* FIXME - remove printk */
printk(KERN_ERR "%s: hss_hdlc_poll: status 0x%02X"
" errors %u\n", dev->name, desc->status,
desc->error_count);
dev->stats.rx_errors++;
}
if (!skb) {
/* put the desc back on RX-ready queue */
desc->buf_len = RX_SIZE;
desc->pkt_len = desc->status = 0;
queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
continue;
}
/* process received frame */
#ifdef __ARMEB__
temp = skb;
skb = port->rx_buff_tab[n];
dma_unmap_single(&dev->dev, desc->data,
RX_SIZE, DMA_FROM_DEVICE);
#else
dma_sync_single(&dev->dev, desc->data,
RX_SIZE, DMA_FROM_DEVICE);
memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
ALIGN(desc->pkt_len, 4) / 4);
#endif
skb_put(skb, desc->pkt_len);
debug_pkt(dev, "hss_hdlc_poll", skb->data, skb->len);
skb->protocol = hdlc_type_trans(skb, dev);
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
netif_receive_skb(skb);
/* put the new buffer on RX-free queue */
#ifdef __ARMEB__
port->rx_buff_tab[n] = temp;
desc->data = phys;
#endif
desc->buf_len = RX_SIZE;
desc->pkt_len = 0;
queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
received++;
}
#if DEBUG_RX
printk(KERN_DEBUG "hss_hdlc_poll: end, not all work done\n");
#endif
return received; /* not all work done */
}