static irqreturn_t ivshmem_msix_handler(int irq, void *opaque)
{
struct uio_info *dev_info = (struct uio_info *) opaque;
/* we have to do this explicitly when using MSI-X */
uio_event_notify(dev_info);
return IRQ_HANDLED;
}
/**
* uio_interrupt - hardware interrupt handler
* @irq: IRQ number, can be UIO_IRQ_CYCLIC for cyclic timer
* @dev_id: Pointer to the devices uio_device structure
*/
static irqreturn_t uio_interrupt(int irq, void *dev_id)
{
struct uio_device *idev = (struct uio_device *)dev_id;
irqreturn_t ret = idev->info->handler(irq, idev->info);
if (ret == IRQ_HANDLED)
uio_event_notify(idev->info);
return ret;
}
/*
* Callback from vmbus_event when something is in inbound ring.
*/
static void hv_uio_channel_cb(void *context)
{
struct hv_uio_private_data *pdata = context;
struct hv_device *dev = pdata->device;
dev->channel->inbound.ring_buffer->interrupt_mask = 1;
mb();
uio_event_notify(&pdata->info);
}
/*
* Callback from vmbus_event when something is in inbound ring.
*/
static void hv_uio_channel_cb(void *context)
{
struct vmbus_channel *chan = context;
struct hv_device *hv_dev = chan->device_obj;
struct hv_uio_private_data *pdata = hv_get_drvdata(hv_dev);
chan->inbound.ring_buffer->interrupt_mask = 1;
virt_mb();
uio_event_notify(&pdata->info);
}
static irqreturn_t ivshmem_msix_handler(int irq, void *opaque)
{
struct uio_info * dev_info = (struct uio_info *) opaque;
/* we have to do this explicitly when using MSI-X */
uio_event_notify(dev_info);
/* debug printk("MSIX Interrupt received\n"); */
return IRQ_HANDLED;
}
/*
* Callback from vmbus_event when channel is rescinded.
*/
static void hv_uio_rescind(struct vmbus_channel *channel)
{
struct hv_device *hv_dev = channel->primary_channel->device_obj;
struct hv_uio_private_data *pdata = hv_get_drvdata(hv_dev);
/*
* Turn off the interrupt file handle
* Next read for event will return -EIO
*/
pdata->info.irq = 0;
/* Wake up reader */
uio_event_notify(&pdata->info);
}
/**
* This is interrupt handler which will check if the interrupt is for the right device.
* If yes, disable it here and will be enable later.
*/
static irqreturn_t
igbuio_pci_irqhandler(int irq, void *dev_id)
{
struct rte_uio_pci_dev *udev = (struct rte_uio_pci_dev *)dev_id;
struct uio_info *info = &udev->info;
/* Legacy mode need to mask in hardware */
if (udev->mode == RTE_INTR_MODE_LEGACY &&
!pci_check_and_mask_intx(udev->pdev))
return IRQ_NONE;
uio_event_notify(info);
/* Message signal mode, no share IRQ and automasked */
return IRQ_HANDLED;
}
