gets used if nothing else is defined in MD headers,
introduce a "PCI_MACHDEP_ENUMERATE_BUS" CPP definition which can
be used by MD headers (just 1 port atm) to plug in special code
- defer access to interrupt configuration register, as its existence depends on
HDRTYPE.
- add "skip particular funtion in multifunction device" functionality
to quirk table.
- add GEODE/NS SC1100 quirk (now boots on soekris Net4801).
enabled on amd64). Add a dmat64 field to various PCI attach structures,
and pass it down where needed. Implement a simple new function called
pci_dma64_available(pa) to test if 64bit DMA addresses may be used.
This returns 1 iff _PCI_HAVE_DMA64 is defined in <machine/pci_machdep.h>,
and there is more than 4G of memory.
int pci_set_powerstate(pci_chipset_tag_t pc, pcitag_t tag, int newstate)
set power state of the device to newstate.
int pci_get_powerstate(pci_chipset_tag_t pc, pcitag_t tag)
get current power state of the device.
In the future, these functions will be used for ACPI support.
pci-pci bridge (and thus needs its interrupts "swizzled").
Formerly, pci_probe_device() assumed pci busses other than bus zero
were bridged; however, much recent x86 hardware supports multiple
primary pci busses differently -- there is a system-wide bus numbering
scheme. Now, we instead look at the (newly introduced) sc_bridgetag
value in the parent bus to figure out if there's a ppb or equivalent
in the way.
This fixed at least one case where the i386 MP branch gets interrupt
mapping wrong.
NULL for root PCI busses. For busses behind a bridge, it points to
a persistent copy of the bridge's pcitag_t. This can be very useful
for machine-dependent PCI bus enumeration code.
* Implement a machine-dependent pci_enumerate_bus() for sparc64 which
uses OFW device nodes to enumerate the bus. When a PCI bus that is
behind a bridge is attached, pci_attach_hook() allocates a new PCI
chipset tag for the new bus and sets it's "curnode" to the OFW node
of the bridge. This is used as a starting point when enumerating
that bus. Root busses get the OFW node of the host bridge (psycho).
* Garbage-collect "ofpci" and "ofppb" from the sparc64 port.
for a device into two functions:
* pci_probe_device() actually probes/attaches the device specified
by the provide pcitag_t.
* pci_enumerate_bus() enumerates the bus, and calls pci_probe_device()
for each device on the bus. A pci_enumerate_bus_generic() is provided
which implements the old method of doing this: If something found at
dev0/func0, determine number of functions and probe each one.
Machine-dependent code will be able to specify the bus enumeration
routine in the future.
If __PCI_DEV_FUNCORDER is defined, don't do the song-and-dance to check if
a device is multi-function; machdep code is going to tell us exactly which
functions to probe.
Note this required changing how pci_func_devorder() works in the
sparc64 PCI machdep code; now the "curnode" is assumed to point
to the bus, rather than some function (typically 0) on the device,
just as pci_bus_devorder() makes that assumption.
All this should allow the PCI code to actually locate the second
HME device on a Sun Netra t1, which is at 3,1 -- previously, the
PCI code would have missed it because there is no device at 3,0.
(Sun deserves a brick to the head for this one -- this seems clearly
out of line with the PCI spec.)
function on all (probed) PCI buses:
int pci_find_device(struct pci_attach_args *pa,
int (*match)(struct pci_attach_args *));
The pci_attach_args structure pointed to by pa is filled in if the
device is found, and 1 is returned. Otherwise 0 is returned.
This function is, unfortunately, needed by the i810 agp code. It's
also of use for LKMs.
Also frob pci_probe_bus to take 2 extra args when used by pci_find_device.
pci_dev_funcorder() that have the following signatures:
int pci_bus_devorder(pci_chipset_tag_t pc, int bus, char list[32]);
int pci_dev_funcorder(pci_chipset_tag_t pc, int bus, int device, char list[8]);
they control the order of PCI bus probe at the device and function level,
by filling in a value from 0 to 31 for pci_bus_devorder() or 0 to 7 for
pci_dev_funcorder, with a value of -1 to signify no more entries.
when device properties arrive, these will be replaced with some facility
based on properties (design/implementation unknown currently.)
pci_config_dump variable to 1. otherwise, it gets set to 0. If
that's set, when configuring PCI devices spew the very verbose
configuration space header dump that was previously "#if 0"'d.
If you use this option, or patch the variable to 1, it's strongly
encouraged that you have used the MSGBUFSIZE option to enlarge the
kernel message buffer.
