static irqreturn_t c2_interrupt(int irq, void *dev_id)
{
unsigned int netisr0, dmaisr;
int handled = 0;
struct c2_dev *c2dev = (struct c2_dev *) dev_id;
netisr0 = readl(c2dev->regs + C2_NISR0);
if (netisr0) {
c2_rx_interrupt(c2dev->netdev);
c2_tx_interrupt(c2dev->netdev);
writel(netisr0, c2dev->regs + C2_NISR0);
handled++;
}
dmaisr = readl(c2dev->regs + C2_DISR);
if (dmaisr) {
writel(dmaisr, c2dev->regs + C2_DISR);
c2_rnic_interrupt(c2dev);
handled++;
}
if (handled) {
return IRQ_HANDLED;
} else {
return IRQ_NONE;
}
}
static int c2_down(struct net_device *netdev)
{
struct c2_port *c2_port = netdev_priv(netdev);
struct c2_dev *c2dev = c2_port->c2dev;
if (netif_msg_ifdown(c2_port))
pr_debug("%s: disabling interface\n",
netdev->name);
c2_tx_interrupt(netdev);
netif_stop_queue(netdev);
writel(1, c2dev->regs + C2_IDIS);
writel(0, c2dev->regs + C2_NIMR0);
c2_reset(c2_port);
c2_tx_clean(c2_port);
c2_rx_clean(c2_port);
kfree(c2_port->rx_ring.start);
kfree(c2_port->tx_ring.start);
pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem,
c2_port->dma);
return 0;
}
static int c2_down(struct net_device *netdev)
{
struct c2_port *c2_port = netdev_priv(netdev);
struct c2_dev *c2dev = c2_port->c2dev;
if (netif_msg_ifdown(c2_port))
pr_debug("%s: disabling interface\n",
netdev->name);
/* Wait for all the queued packets to get sent */
c2_tx_interrupt(netdev);
/* Disable network packets */
netif_stop_queue(netdev);
/* Disable IRQs by clearing the interrupt mask */
writel(1, c2dev->regs + C2_IDIS);
writel(0, c2dev->regs + C2_NIMR0);
/* missing: Stop transmitter */
/* missing: Stop receiver */
/* Reset the adapter, ensures the driver is in sync with the RXP */
c2_reset(c2_port);
/* missing: Turn off LEDs here */
/* Free all buffers in the host descriptor rings */
c2_tx_clean(c2_port);
c2_rx_clean(c2_port);
/* Free the host descriptor rings */
kfree(c2_port->rx_ring.start);
kfree(c2_port->tx_ring.start);
pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem,
c2_port->dma);
return 0;
}
/*
* Handle netisr0 TX & RX interrupts.
*/
static irqreturn_t c2_interrupt(int irq, void *dev_id)
{
unsigned int netisr0, dmaisr;
int handled = 0;
struct c2_dev *c2dev = (struct c2_dev *) dev_id;
/* Process CCILNET interrupts */
netisr0 = readl(c2dev->regs + C2_NISR0);
if (netisr0) {
/*
* There is an issue with the firmware that always
* provides the status of RX for both TX & RX
* interrupts. So process both queues here.
*/
c2_rx_interrupt(c2dev->netdev);
c2_tx_interrupt(c2dev->netdev);
/* Clear the interrupt */
writel(netisr0, c2dev->regs + C2_NISR0);
handled++;
}
/* Process RNIC interrupts */
dmaisr = readl(c2dev->regs + C2_DISR);
if (dmaisr) {
writel(dmaisr, c2dev->regs + C2_DISR);
c2_rnic_interrupt(c2dev);
handled++;
}
if (handled) {
return IRQ_HANDLED;
} else {
return IRQ_NONE;
}
}