Beispiel #1
0
static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance,
					struct pt_regs *regs)
{
	struct ata_host_set *host_set = dev_instance;
	unsigned int i;
	unsigned int handled = 0;
	unsigned long flags;

	spin_lock_irqsave(&host_set->lock, flags);

	for (i = 0; i < host_set->n_ports; i++) {
		struct ata_port *ap;

		ap = host_set->ports[i];
		if (ap &&
		    !(ap->flags & ATA_FLAG_DISABLED)) {
			struct ata_queued_cmd *qc;

			qc = ata_qc_from_tag(ap, ap->active_tag);
			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
				handled += ata_host_intr(ap, qc);
			else
				// No request pending?  Clear interrupt status
				// anyway, in case there's one pending.
				ap->ops->check_status(ap);
		}

	}

	spin_unlock_irqrestore(&host_set->lock, flags);

	return IRQ_RETVAL(handled);
}
Beispiel #2
0
static int nv_host_intr(struct ata_port *ap, u8 irq_stat)
{
	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
	int handled;

	/* freeze if hotplugged */
	if (unlikely(irq_stat & (NV_INT_ADDED | NV_INT_REMOVED))) {
		ata_port_freeze(ap);
		return 1;
	}

	/* bail out if not our interrupt */
	if (!(irq_stat & NV_INT_DEV))
		return 0;

	/* DEV interrupt w/ no active qc? */
	if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
		ata_check_status(ap);
		return 1;
	}

	/* handle interrupt */
	handled = ata_host_intr(ap, qc);
	if (unlikely(!handled)) {
		/* spurious, clear it */
		ata_check_status(ap);
	}

	return 1;
}
Beispiel #3
0
static void inic_host_intr(struct ata_port *ap)
{
	void __iomem *port_base = inic_port_base(ap);
	struct ata_eh_info *ehi = &ap->link.eh_info;
	u8 irq_stat;

	/* fetch and clear irq */
	irq_stat = readb(port_base + PORT_IRQ_STAT);
	writeb(irq_stat, port_base + PORT_IRQ_STAT);

	if (likely(!(irq_stat & PIRQ_ERR))) {
		struct ata_queued_cmd *qc =
			ata_qc_from_tag(ap, ap->link.active_tag);

		if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
			ata_chk_status(ap);	/* clear ATA interrupt */
			return;
		}

		if (likely(ata_host_intr(ap, qc)))
			return;

		ata_chk_status(ap);	/* clear ATA interrupt */
		ata_port_printk(ap, KERN_WARNING, "unhandled "
				"interrupt, irq_stat=%x\n", irq_stat);
		return;
	}

	/* error */
	ata_ehi_push_desc(ehi, "irq_stat=0x%x", irq_stat);

	if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
		ata_ehi_hotplugged(ehi);
		ata_port_freeze(ap);
	} else
		ata_port_abort(ap);
}