Rework the ACPI PCI link code.

- Use a new-bus device driver for the ACPI PCI link devices.  The devices
  are called pci_linkX.  The driver includes suspend/resume support so that
  the ACPI bridge drivers no longer have to poke the links to get them
  to handle suspend/resume.  Also, the code to handle which IRQs a link is
  routed to and choosing an IRQ when a link is not already routed is all
  contained in the link driver.  The PCI bridge drivers now ask the link
  driver which IRQ to use once they determine that a _PRT entry does not
  use a hardwired interrupt number.
- The new link driver includes support for multiple IRQ resources per
  link device as well as preserving any non-IRQ resources when adjusting
  the IRQ that a link is routed to.
- The entire approach to routing when using a link device is now
  link-centric rather than pci bus/device/pin specific.  Thus, when
  using a tunable to override the default IRQ settings, one now uses
  a single tunable to route an entire link rather than routing a single
  device that uses the link (which has great foot-shooting potential if
  the user tries to route the same link to two different IRQs using two
  different pci bus/device/pin hints).  For example, to adjust the IRQ
  that \_SB_.LNKA uses, one would set 'hw.pci.link.LNKA.irq=10' from the
  loader.
- As a side effect of having the link driver, unused link devices will now
  be disabled when they are probed.
- The algorithm for choosing an IRQ for a link that doesn't already have an
  IRQ assigned is now much closer to the one used in $PIR routing.  When a
  link is routed via an ISA IRQ, only known-good IRQs that the BIOS has
  already used are used for routing instead of using probabilities to
  guess at which IRQs are probably not used by an ISA device.  One change
  from $PIR is that the SCI is always considered a viable ISA IRQ, so that
  if the BIOS does not setup any IRQs the kernel will degenerate to routing
  all interrupts over the SCI.  For non ISA IRQs, interrupts are picked
  from the possible pool using a simplistic weighting algorithm.

Tested by:	ru, scottl, others on acpi@
Reviewed by:	njl

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/dev/acpica/acpi_pcib_acpi.c b/sys/dev/acpica/acpi_pcib_acpi.c
index 5614f6c..b1d14ab 100644
--- a/sys/dev/acpica/acpi_pcib_acpi.c
+++ b/sys/dev/acpica/acpi_pcib_acpi.c
@@ -297,8 +297,9 @@ acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
 static int
 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
 {
+    struct acpi_hpcib_softc *sc = device_get_softc(pcib);
 
-    return (acpi_pcib_route_interrupt(pcib, dev, pin));
+    return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
 }
 
 static u_long acpi_host_mem_start = 0x80000000;