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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: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-11-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2021-07-01 15:27:28 +02:00 committed by Michael Ellerman
parent 9a014f4568
commit 174db9e7f7
3 changed files with 15 additions and 0 deletions
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10
arch/powerpc/platforms/pseries/msi.c
View File

@ -733,6 +733,16 @@ int pseries_msi_allocate_domains(struct pci_controller *phb)
return __pseries_msi_allocate_domains(phb, count); 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) static void rtas_msi_pci_irq_fixup(struct pci_dev *pdev)
{ {
/* No LSI -> leave MSIs (if any) configured */ /* No LSI -> leave MSIs (if any) configured */

4
arch/powerpc/platforms/pseries/pci_dlpar.c
View File

@ -33,6 +33,8 @@ struct pci_controller *init_phb_dynamic(struct device_node *dn)
pci_devs_phb_init_dynamic(phb); pci_devs_phb_init_dynamic(phb);
pseries_msi_allocate_domains(phb);
/* Create EEH devices for the PHB */ /* Create EEH devices for the PHB */
eeh_phb_pe_create(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 */ /* Remove the PCI bus and unregister the bridge device from sysfs */
phb->bus = NULL; phb->bus = NULL;
pci_remove_bus(b); pci_remove_bus(b);

1
arch/powerpc/platforms/pseries/pseries.h
View File

@ -86,6 +86,7 @@ int pseries_root_bridge_prepare(struct pci_host_bridge *bridge);
extern struct pci_controller_ops pseries_pci_controller_ops; extern struct pci_controller_ops pseries_pci_controller_ops;
int pseries_msi_allocate_domains(struct pci_controller *phb); 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); unsigned long pseries_memory_block_size(void);