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Message-ID: <87r0vhzhls.fsf@mpe.ellerman.id.au>
Date: Thu, 26 Jan 2023 21:59:43 +1100
From: Michael Ellerman <mpe@...erman.id.au>
To: Pali Rohár <pali@...nel.org>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] powerpc/pci: Allow to disable filling deprecated
pci-OF-bus-map
Pali Rohár <pali@...nel.org> writes:
> PING? It is more than 5 months since this patch series is there and it
> still has not received any comment.
There was some related discussion in another thread.
I planned to pick it up last merge window, but it breaks the
pmac32_defconfig build when CONFIG_PPC_PCI_OF_BUS_MAP_FILL=n:
ld: arch/powerpc/platforms/powermac/feature.o: in function `core99_ata100_enable':
feature.c:(.text+0xcd0): undefined reference to `pci_device_from_OF_node'
ld: arch/powerpc/platforms/powermac/pci.o: in function `pmac_pci_init':
pci.c:(.init.text+0x5d4): undefined reference to `pci_device_from_OF_node'
ld: pci.c:(.init.text+0x660): undefined reference to `pci_device_from_OF_node'
So I dropped it, and haven't had time to work out a fix.
cheers
> On Friday 16 December 2022 19:12:06 Pali Rohár wrote:
>> PING?
>>
>> On Saturday 26 November 2022 17:23:45 Pali Rohár wrote:
>> > PING?
>> >
>> > On Tuesday 01 November 2022 23:26:03 Pali Rohár wrote:
>> > > Hello! Gentle reminder...
>> > >
>> > > On Sunday 09 October 2022 13:25:55 Pali Rohár wrote:
>> > > > Hello! Any comments on this? It would be nice to take these two patches
>> > > > (or at least patch 2) to finally enable PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
>> > > > by default where possible.
>> > > >
>> > > > Per following comment there can be an issue with early powermac so seems
>> > > > that PPC_PCI_OF_BUS_MAP_FILL still has to be by default enabled (which
>> > > > implies that PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT is disabled) on powermac:
>> > > > https://lore.kernel.org/linuxppc-dev/575f239205e8635add81c9f902b7d9db7beb83ea.camel@kernel.crashing.org/
>> > > >
>> > > > On Wednesday 17 August 2022 18:39:26 Pali Rohár wrote:
>> > > > > Creating or filling pci-OF-bus-map property in the device-tree is
>> > > > > deprecated since May 2006 [1]. Allow to disable filling this property by
>> > > > > unsetting config option CONFIG_PPC_PCI_OF_BUS_MAP_FILL for remaining chrp
>> > > > > and powermac code.
>> > > > >
>> > > > > Disabling of pci-OF-bus-map property allows to enable new option
>> > > > > CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT also for chrp and powermac.
>> > > > >
>> > > > > [1] - https://lore.kernel.org/linuxppc-dev/1148016268.13249.14.camel@localhost.localdomain/
>> > > > >
>> > > > > Signed-off-by: Pali Rohár <pali@...nel.org>
>> > > > > ---
>> > > > > arch/powerpc/Kconfig | 12 +++++++++++-
>> > > > > arch/powerpc/kernel/pci_32.c | 6 ++++++
>> > > > > 2 files changed, 17 insertions(+), 1 deletion(-)
>> > > > >
>> > > > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
>> > > > > index 5881441f7672..df2696c406ad 100644
>> > > > > --- a/arch/powerpc/Kconfig
>> > > > > +++ b/arch/powerpc/Kconfig
>> > > > > @@ -373,9 +373,19 @@ config PPC_DCR
>> > > > > depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
>> > > > > default y
>> > > > >
>> > > > > +config PPC_PCI_OF_BUS_MAP_FILL
>> > > > > + bool "Fill pci-OF-bus-map property in the device-tree"
>> > > > > + depends on PPC32
>> > > > > + depends on PPC_PMAC || PPC_CHRP
>> > > > > + default y
>> > > > > + help
>> > > > > + This option creates and fills pci-OF-bus-map property in the
>> > > > > + device-tree which is deprecated and is needed only for old
>> > > > > + platforms.
>> > > > > +
>> > > > > config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
>> > > > > depends on PPC32
>> > > > > - depends on !PPC_PMAC && !PPC_CHRP
>> > > > > + depends on !PPC_PCI_OF_BUS_MAP_FILL
>> > > > > bool "Assign PCI bus numbers from zero individually for each PCI domain"
>> > > > > help
>> > > > > By default on PPC32 were PCI bus numbers unique across all PCI domains.
>> > > > > diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
>> > > > > index 433965bf37b4..ffc4e1928c80 100644
>> > > > > --- a/arch/powerpc/kernel/pci_32.c
>> > > > > +++ b/arch/powerpc/kernel/pci_32.c
>> > > > > @@ -64,6 +64,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixu
>> > > > >
>> > > > > #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_CHRP)
>> > > > >
>> > > > > +#ifdef CONFIG_PPC_PCI_OF_BUS_MAP_FILL
>> > > > > +
>> > > > > static u8* pci_to_OF_bus_map;
>> > > > > static int pci_bus_count;
>> > > > >
>> > > > > @@ -223,6 +225,8 @@ pci_create_OF_bus_map(void)
>> > > > > }
>> > > > > #endif
>> > > > >
>> > > > > +#endif /* CONFIG_PPC_PCI_OF_BUS_MAP_FILL */
>> > > > > +
>> > > > > #endif /* defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_CHRP) */
>> > > > >
>> > > > > void pcibios_setup_phb_io_space(struct pci_controller *hose)
>> > > > > @@ -264,6 +268,7 @@ static int __init pcibios_init(void)
>> > > > > }
>> > > > >
>> > > > > #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_CHRP)
>> > > > > +#ifdef CONFIG_PPC_PCI_OF_BUS_MAP_FILL
>> > > > > pci_bus_count = next_busno;
>> > > > >
>> > > > > /* OpenFirmware based machines need a map of OF bus
>> > > > > @@ -272,6 +277,7 @@ static int __init pcibios_init(void)
>> > > > > */
>> > > > > if (pci_assign_all_buses)
>> > > > > pcibios_make_OF_bus_map();
>> > > > > +#endif
>> > > > > #endif
>> > > > >
>> > > > > /* Call common code to handle resource allocation */
>> > > > > --
>> > > > > 2.20.1
>> > > > >
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