Date: Tue, 8 Jun 2021 12:37:49 -0400 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Marcin Wojtas <mw@FreeBSD.org>, src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: Re: git: 28c4e511c23f - main - Add ofw interface support to PCI Message-ID: <0d50b80a-dbbc-9db9-0a31-1baaedc9978e@freebsd.org> In-Reply-To: <202106081552.158FqkLO005343@gitrepo.freebsd.org> References: <202106081552.158FqkLO005343@gitrepo.freebsd.org>
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Did you look at moving sys/powerpc/ofw/ofw_pcibus.c to MI code? It does a bit more than this (NUMA etc.) and isn't actually PowerPC-specific. -Nathan On 6/8/21 11:52 AM, Marcin Wojtas wrote: > The branch main has been updated by mw: > > URL: https://cgit.FreeBSD.org/src/commit/?id=28c4e511c23f8b7fd131a13cc2a027aefcb520b7 > > commit 28c4e511c23f8b7fd131a13cc2a027aefcb520b7 > Author: Marcin Wojtas <mw@FreeBSD.org> > AuthorDate: 2021-05-27 08:09:04 +0000 > Commit: Marcin Wojtas <mw@FreeBSD.org> > CommitDate: 2021-06-08 15:52:02 +0000 > > Add ofw interface support to PCI > > Some arm64 SoCs have nodes in their fdts that describe devices > connected to the internal PCI bus. One such SoC is Freescale LS1028A. > In order to access information stored in them we need to add ofw bus > support to pci. Pass devinfo request up to our parent, which > is responsible for parsing all the information. > It allows to use ofw interface on PCI devices that support it. > This method is similar to sys/dev/acpica/acpi_pci.c. > > Submitted by: Kornel Duleba <mindal@semihalf.com> > Reviewed by: andrew > Obtained from: Semihalf > Sponsored by: Alstom Group > Differential Revision: https://reviews.freebsd.org/D30181 > --- > sys/conf/files.arm64 | 1 + > sys/dev/ofw/ofw_pci.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 94 insertions(+) > > diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64 > index fed33562b834..7b9b2583aaa1 100644 > --- a/sys/conf/files.arm64 > +++ b/sys/conf/files.arm64 > @@ -245,6 +245,7 @@ dev/neta/if_mvneta_fdt.c optional neta fdt > dev/neta/if_mvneta.c optional neta mdio mii > > dev/ofw/ofw_cpu.c optional fdt > +dev/ofw/ofw_pci.c optional fdt pci > dev/ofw/ofw_pcib.c optional fdt pci > > dev/pci/controller/pci_n1sdp.c optional pci_n1sdp acpi > diff --git a/sys/dev/ofw/ofw_pci.c b/sys/dev/ofw/ofw_pci.c > new file mode 100644 > index 000000000000..c7ed7c5c8fe9 > --- /dev/null > +++ b/sys/dev/ofw/ofw_pci.c > @@ -0,0 +1,93 @@ > +/*- > + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD > + * > + * Copyright (c) 2021 Alstom Group. > + * Copyright (c) 2021 Semihalf. > + * > + * 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 ``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 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("$FreeBSD$"); > + > +#include <sys/param.h> > +#include <sys/systm.h> > +#include <sys/bus.h> > +#include <sys/kernel.h> > +#include <sys/module.h> > + > +#include <dev/pci/pcireg.h> > +#include <dev/pci/pcivar.h> > +#include <dev/pci/pci_private.h> > + > +#include <dev/ofw/openfirm.h> > +#include <dev/ofw/ofw_bus.h> > +#include <dev/ofw/ofw_bus_subr.h> > + > +#include "pcib_if.h" > +#include "pci_if.h" > + > +static int ofw_pci_probe(device_t); > +static const struct ofw_bus_devinfo* pci_ofw_get_devinfo(device_t, device_t); > + > +static device_method_t ofw_pci_methods[] = { > + DEVMETHOD(device_probe, ofw_pci_probe), > + > + /* ofw_bus interface */ > + DEVMETHOD(ofw_bus_get_devinfo, pci_ofw_get_devinfo), > + DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), > + DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), > + DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), > + DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), > + DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), > + > + DEVMETHOD_END > +}; > + > +static devclass_t pci_devclass; > + > +DEFINE_CLASS_1(pci, ofw_pci_driver, ofw_pci_methods, sizeof(struct pci_softc), > + pci_driver); > +DRIVER_MODULE(ofw_pci, pcib, ofw_pci_driver, pci_devclass, 0, 0); > +MODULE_DEPEND(ofw_pci, simplebus, 1, 1, 1); > +MODULE_DEPEND(ofw_pci, pci, 1, 1, 1); > +MODULE_VERSION(ofw_pci, 1); > + > +static int > +ofw_pci_probe(device_t dev) > +{ > + device_t parent; > + > + parent = device_get_parent(dev); > + if (ofw_bus_get_node(parent) <= 0) > + return (ENXIO); > + > + device_set_desc(dev, "OFW PCI bus"); > + return (BUS_PROBE_DEFAULT); > +} > + > +/* Pass the request up to our parent. */ > +static const struct ofw_bus_devinfo* > +pci_ofw_get_devinfo(device_t bus, device_t dev) > +{ > + > + return OFW_BUS_GET_DEVINFO(device_get_parent(bus), dev); > +} >
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