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PCI: designware: Factor out MSI msg setup 

Factor out the PCI MSI message setup from the single MSI setup function.
This will be reused by the multivector MSI setup.

No functional change yet.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Pratyush Anand <pratyush.anand@gmail.com>
This commit is contained in:
Lucas Stach 2015-09-18 13:58:35 -05:00 committed by Bjorn Helgaas
parent 339e5b44ed
commit ea643e1a33
1 changed files with 17 additions and 11 deletions
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28
drivers/pci/host/pcie-designware.c
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@ -293,19 +293,9 @@ static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
return -ENOSPC;
}
static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
struct msi_desc *desc)
static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
{
int irq, pos;
struct msi_msg msg;
struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata);
if (desc->msi_attrib.is_msix)
return -EINVAL;
irq = assign_irq(1, desc, &pos);
if (irq < 0)
return irq;
if (pp->ops->get_msi_addr)
msg.address_lo = pp->ops->get_msi_addr(pp);
@ -319,6 +309,22 @@ static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
msg.data = pos;
pci_write_msi_msg(irq, &msg);
}
static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
struct msi_desc *desc)
{
int irq, pos;
struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata);
if (desc->msi_attrib.is_msix)
return -EINVAL;
irq = assign_irq(1, desc, &pos);
if (irq < 0)
return irq;
dw_msi_setup_msg(pp, irq, pos);
return 0;
}