> +int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int
> type)
> +{
> + int irq = -1;
> + struct physdev_map_pirq map_irq;
> + int rc;
> + int pos;
> + u32 table_offset, bir;
> +
> + memset(&map_irq, 0, sizeof(map_irq));
> + map_irq.domid = DOMID_SELF;
> + map_irq.type = MAP_PIRQ_TYPE_MSI;
> + map_irq.index = -1;
> + map_irq.pirq = -1;
> + map_irq.bus = dev->bus->number;
> + map_irq.devfn = dev->devfn;
> +
> + if (type == PCI_CAP_ID_MSIX) {
> + pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
> +
> + pci_read_config_dword(dev, msix_table_offset_reg(pos),
> + &table_offset);
> + bir = (u8)(table_offset & PCI_MSIX_FLAGS_BIRMASK);
> +
> + map_irq.table_base = pci_resource_start(dev, bir);
> + map_irq.entry_nr = msidesc->msi_attrib.entry_nr;
> + }
> +
> + spin_lock(&irq_mapping_update_lock);
> +
> + irq = find_unbound_irq();
> +
> + if (irq == -1)
> + goto out;
> +
> + rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
> + if (rc) {
> + printk(KERN_WARNING "xen map irq failed %d\n", rc);
> +
> + dynamic_irq_cleanup(irq);
Looking at include/linux/irq.h, I see this commment:
/*
330 * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and
331 * irq_free_desc instead.
332 */
So we should use irq_free_desc instead of dynamic_irq_cleanup.
(fyi, I didn't realize this until I started pulling in the sparse_irq
patchset).
> +
> + irq = -1;
> + goto out;
> + }
> + irq_info[irq] = mk_pirq_info(0, map_irq.pirq, 0, map_irq.index);
> +
> + set_irq_chip_and_handler_name(irq, &xen_pirq_chip,
> + handle_level_irq,
> + (type == PCI_CAP_ID_MSIX) ? "msi-x":"msi");
> +
> +out:
> + spin_unlock(&irq_mapping_update_lock);
> + return irq;
> +}
> +#endif
> +
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home