Add a msi_controller setup_irqs() method so MSI chip providers can
implement their own multivector MSI setup.
[bhelgaas: changelog]
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Pratyush Anand <pratyush.anand@xxxxxxxxx>
---
drivers/pci/msi.c | 3 +++
include/linux/msi.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index d4497141d083..74319f497656 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -105,9 +105,12 @@ void __weak arch_teardown_msi_irq(unsigned int irq)
int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
+ struct msi_controller *chip = dev->bus->msi;
struct msi_desc *entry;
int ret;
+ if (chip && chip->setup_irqs)
+ return chip->setup_irqs(chip, dev, nvec, type);
/*
* If an architecture wants to support multiple MSI, it needs to
* override arch_setup_msi_irqs()
diff --git a/include/linux/msi.h b/include/linux/msi.h
index ad939d0ba816..0be5db110bfa 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -163,6 +163,8 @@ struct msi_controller {
int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev,
struct msi_desc *desc);
+ int (*setup_irqs)(struct msi_controller *chip, struct pci_dev *dev,
+ int nvec, int type);
void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
};
--
2.5.1
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
