freebsd-dev/sys/dev/pci/pcib_support.c
Ruslan Bukin b7672a7025 Add OFW_IOMMU id type for pci_get_id() so we can ask parent IOMMU
controller to map PCI RID to an IOMMU specifier.

Sponsored by:	UKRI
Discussed with:	jhb
Differential Revision: https://reviews.freebsd.org/D35129
2022-05-07 10:21:09 +01:00

85 lines
2.5 KiB
C

/*
* Copyright (c) 2014 Sandvine Inc. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Support functions for the PCI:PCI bridge driver. This has to be in a
* separate file because kernel configurations end up referencing the functions
* here even when pci support is compiled out of the kernel.
*/
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcib_private.h>
#include "pcib_if.h"
int
pcib_maxfuncs(device_t dev)
{
return (PCI_FUNCMAX);
}
int
pcib_get_id(device_t pcib, device_t dev, enum pci_id_type type, uintptr_t *id)
{
uint8_t bus, slot, func;
if (type == PCI_ID_OFW_IOMMU)
return (PCI_GET_ID(device_get_parent(pcib), dev, type, id));
if (type != PCI_ID_RID)
return (ENXIO);
bus = pci_get_bus(dev);
slot = pci_get_slot(dev);
func = pci_get_function(dev);
*id = (PCI_RID(bus, slot, func));
return (0);
}
void
pcib_decode_rid(device_t pcib, uint16_t rid, int *bus, int *slot,
int *func)
{
*bus = PCI_RID2BUS(rid);
*slot = PCI_RID2SLOT(rid);
*func = PCI_RID2FUNC(rid);
}