MD support for PCI Message Signalled Interrupts on amd64 and i386:

- Add a new apic_alloc_vectors() method to the local APIC support code
  to allocate N contiguous IDT vectors (aligned on a M >= N boundary).
  This function is used to allocate IDT vectors for a group of MSI
  messages.
- Add MSI and MSI-X PICs.  The PIC code here provides methods to manage
  edge-triggered MSI messages as x86 interrupt sources.  In addition to
  the PIC methods, msi.c also includes methods to allocate and release
  MSI and MSI-X messages.  For x86, we allow for up to 128 different
  MSI IRQs starting at IRQ 256 (IRQs 0-15 are reserved for ISA IRQs,
  16-254 for APIC PCI IRQs, and IRQ 255 is reserved).
- Add pcib_(alloc|release)_msi[x]() methods to the MD x86 PCI bridge
  drivers to bubble the request up to the nexus driver.
- Add pcib_(alloc|release)_msi[x]() methods to the x86 nexus drivers that
  ask the MSI PIC code to allocate resources and IDT vectors.

MFC after:	2 months

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/amd64/pci/pci_bus.c b/sys/amd64/pci/pci_bus.c
index 716b050..6efde3a 100644
--- a/sys/amd64/pci/pci_bus.c
+++ b/sys/amd64/pci/pci_bus.c
@@ -322,6 +322,10 @@ static device_method_t legacy_pcib_methods[] = {
 	DEVMETHOD(pcib_read_config,	legacy_pcib_read_config),
 	DEVMETHOD(pcib_write_config,	legacy_pcib_write_config),
 	DEVMETHOD(pcib_route_interrupt,	legacy_pcib_route_interrupt),
+	DEVMETHOD(pcib_alloc_msi,	pcib_alloc_msi),
+	DEVMETHOD(pcib_release_msi,	pcib_release_msi),
+	DEVMETHOD(pcib_alloc_msix,	pcib_alloc_msix),
+	DEVMETHOD(pcib_release_msix,	pcib_release_msix),
 
 	{ 0, 0 }
 };