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genirq/msi: Make msi_get_virq() device domain aware

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In preparation of the upcoming per device multi MSI domain support, change
the interface to support lookups based on domain id and zero based index
within the domain.

Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124230314.044613697@linutronix.de
This commit is contained in:
Ahmed S. Darwish
2022-11-25 00:24:25 +01:00
committed by Thomas Gleixner
parent 94ff94cfea
commit 98043704f3
2 changed files with 26 additions and 7 deletions
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19
kernel/irq/msi.c
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@ -337,26 +337,32 @@ struct msi_desc *msi_next_desc(struct device *dev, unsigned int domid,
EXPORT_SYMBOL_GPL(msi_next_desc);
/**
* msi_get_virq - Return Linux interrupt number of a MSI interrupt
* msi_domain_get_virq - Lookup the Linux interrupt number for a MSI index on a interrupt domain
* @dev: Device to operate on
* @domid: Domain ID of the interrupt domain associated to the device
* @index: MSI interrupt index to look for (0-based)
*
* Return: The Linux interrupt number on success (> 0), 0 if not found
*/
unsigned int msi_get_virq(struct device *dev, unsigned int index)
unsigned int msi_domain_get_virq(struct device *dev, unsigned int domid, unsigned int index)
{
struct msi_desc *desc;
unsigned int ret = 0;
bool pcimsi = false;
struct xarray *xa;
bool pcimsi;
if (!dev->msi.data)
return 0;
pcimsi = dev_is_pci(dev) ? to_pci_dev(dev)->msi_enabled : false;
if (WARN_ON_ONCE(index > MSI_MAX_INDEX || domid >= MSI_MAX_DEVICE_IRQDOMAINS))
return 0;
/* This check is only valid for the PCI default MSI domain */
if (dev_is_pci(dev) && domid == MSI_DEFAULT_DOMAIN)
pcimsi = to_pci_dev(dev)->msi_enabled;
msi_lock_descs(dev);
xa = &dev->msi.data->__domains[MSI_DEFAULT_DOMAIN].store;
xa = &dev->msi.data->__domains[domid].store;
desc = xa_load(xa, pcimsi ? 0 : index);
if (desc && desc->irq) {
/*
@ -371,10 +377,11 @@ unsigned int msi_get_virq(struct device *dev, unsigned int index)
ret = desc->irq;
}
}
msi_unlock_descs(dev);
return ret;
}
EXPORT_SYMBOL_GPL(msi_get_virq);
EXPORT_SYMBOL_GPL(msi_domain_get_virq);
#ifdef CONFIG_SYSFS
static struct attribute *msi_dev_attrs[] = {