Commit e8120200 authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Michael Ellerman
Browse files

powerpc/pseries/pci: Introduce rtas_prepare_msi_irqs() 



This splits the routine setting the MSIs in two parts: allocation of
MSIs for the PCI device at the FW level (RTAS) and the actual mapping
and activation of the IRQs.

rtas_prepare_msi_irqs() will serve as a handler for the PCI MSI domain.

Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-3-clg@kaod.org
parent 786e5b10

arch/powerpc/platforms/pseries/msi.c

+19 −4
Original line number Diff line number Diff line
@@ -373,12 +373,11 @@ static void rtas_hack_32bit_msi_gen2(struct pci_dev *pdev) 
	pci_write_config_dword(pdev, pdev->msi_cap + PCI_MSI_ADDRESS_HI, 0);

}



static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type)

static int rtas_prepare_msi_irqs(struct pci_dev *pdev, int nvec_in, int type,

				 msi_alloc_info_t *arg)

{

	struct pci_dn *pdn;

	int hwirq, virq, i, quota, rc;

	struct msi_desc *entry;

	struct msi_msg msg;

	int quota, rc;

	int nvec = nvec_in;

	int use_32bit_msi_hack = 0;
@@ -456,6 +455,22 @@ static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type) 
		return rc;

	}



	return 0;

}



static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type)

{

	struct pci_dn *pdn;

	int hwirq, virq, i;

	int rc;

	struct msi_desc *entry;

	struct msi_msg msg;



	rc = rtas_prepare_msi_irqs(pdev, nvec_in, type, NULL);

	if (rc)

		return rc;



	pdn = pci_get_pdn(pdev);

	i = 0;

	for_each_pci_msi_entry(entry, pdev) {

		hwirq = rtas_query_irq_number(pdn, i++);