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PCI: designware: Factor out MSI msg setup

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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;
}