Commit 174db9e7 authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Michael Ellerman
Browse files

powerpc/pseries/pci: Add support of MSI domains to PHB hotplug 



Simply allocate or release the MSI domains when a PHB is inserted in
or removed from the machine.

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/20210701132750.1475580-11-clg@kaod.org
parent 9a014f45

arch/powerpc/platforms/pseries/msi.c

+10 −0
Original line number Diff line number Diff line
@@ -733,6 +733,16 @@ int pseries_msi_allocate_domains(struct pci_controller *phb) 
	return __pseries_msi_allocate_domains(phb, count);

}



void pseries_msi_free_domains(struct pci_controller *phb)

{

	if (phb->msi_domain)

		irq_domain_remove(phb->msi_domain);

	if (phb->dev_domain)

		irq_domain_remove(phb->dev_domain);

	if (phb->fwnode)

		irq_domain_free_fwnode(phb->fwnode);

}



static void rtas_msi_pci_irq_fixup(struct pci_dev *pdev)

{

	/* No LSI -> leave MSIs (if any) configured */

arch/powerpc/platforms/pseries/pci_dlpar.c

+4 −0
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ struct pci_controller *init_phb_dynamic(struct device_node *dn) 


	pci_devs_phb_init_dynamic(phb);



	pseries_msi_allocate_domains(phb);



	/* Create EEH devices for the PHB */

	eeh_phb_pe_create(phb);
@@ -74,6 +76,8 @@ int remove_phb_dynamic(struct pci_controller *phb) 
		}

	}



	pseries_msi_free_domains(phb);



	/* Remove the PCI bus and unregister the bridge device from sysfs */

	phb->bus = NULL;

	pci_remove_bus(b);

arch/powerpc/platforms/pseries/pseries.h

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ int pseries_root_bridge_prepare(struct pci_host_bridge *bridge); 


extern struct pci_controller_ops pseries_pci_controller_ops;

int pseries_msi_allocate_domains(struct pci_controller *phb);

void pseries_msi_free_domains(struct pci_controller *phb);



unsigned long pseries_memory_block_size(void);