| Message ID | 20211227164317.4146918-2-schnelle@linux.ibm.com (mailing list archive) |
|---|---|
| State | RFC |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [RFC,01/32] Kconfig: introduce and depend on LEGACY_PCI | expand |
On 12/27/21 8:42 AM, Niklas Schnelle wrote: > Introduce a new LEGACY_PCI Kconfig option which gates support for legacy > PCI devices including those attached to a PCI-to-PCI Express bridge and > PCI Express devices using legacy I/O spaces. Note that this is different > from non PCI uses of I/O ports such as by ACPI. > > Add dependencies on LEGACY_PCI for all PCI drivers which only target > legacy PCI devices and ifdef legacy PCI specific functions in ata > handling. > This effectively disables all default configurations which now depend on CONFIG_LEGACY_PCI. Yet, I don't see CONFIG_LEGACY_PCI added to configuration files which explicitly enable any of the affected configurations. Is that on purpose ? If so, I think it should at least be mentioned in the commit description. However, I think it would be more appropriate to either delete all affected configuration flags from the affected configuration files, or to add CONFIG_LEGACY_PCI=y to those files. Guenter
Em Mon, 27 Dec 2021 17:42:46 +0100 Niklas Schnelle <schnelle@linux.ibm.com> escreveu: > Introduce a new LEGACY_PCI Kconfig option which gates support for legacy > PCI devices including those attached to a PCI-to-PCI Express bridge and > PCI Express devices using legacy I/O spaces. Note that this is different > from non PCI uses of I/O ports such as by ACPI. > > Add dependencies on LEGACY_PCI for all PCI drivers which only target > legacy PCI devices and ifdef legacy PCI specific functions in ata > handling. > > Co-developed-by: Arnd Bergmann <arnd@kernel.org> > Signed-off-by: Arnd Bergmann <arnd@kernel.org> > Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> > --- > drivers/ata/Kconfig | 34 ++++++++-------- > drivers/ata/ata_generic.c | 3 +- > drivers/ata/libata-sff.c | 2 + > drivers/comedi/Kconfig | 42 +++++++++++++++++++ > drivers/gpio/Kconfig | 2 +- > drivers/hwmon/Kconfig | 6 +-- > drivers/i2c/busses/Kconfig | 24 +++++------ > drivers/input/gameport/Kconfig | 4 +- > drivers/isdn/hardware/mISDN/Kconfig | 14 +++---- > drivers/media/cec/platform/Kconfig | 2 +- > drivers/media/pci/dm1105/Kconfig | 2 +- > drivers/media/radio/Kconfig | 2 +- Not sure what you meant by "legacy I/O spaces" on this patch. I mean, I would expect non-PCIe devices - like bttv and other devices developed at the past millennium or so to be "legacy", but at least on media, it is touching some drivers that aren't that old, while keeping the really old ones untouched. Instead, it is touching a driver developed in 2017 plus two other ones that are a way newer than other drivers. The support for the Bt8xx chipset, in particular, is really weird, as a sound driver for such chipset: > @@ -172,6 +177,7 @@ config SND_AZT3328 > > config SND_BT87X > tristate "Bt87x Audio Capture" > + depends on LEGACY_PCI > select SND_PCM > help > If you want to record audio from TV cards based on was marked as dependent of LEGACY_PCI, while the DVB and V4L2 ones weren't. Sounds confusing to me, as the PCI bridge used by a Bt87x device should be the same for all three subdevices. I'm confused... Regards, Mauro
On Mon, Dec 27, 2021 at 05:42:46PM +0100, Niklas Schnelle wrote: > --- a/drivers/pci/Kconfig > +++ b/drivers/pci/Kconfig > @@ -23,6 +23,17 @@ menuconfig PCI > > if PCI > > +config LEGACY_PCI > + bool "Enable support for legacy PCI devices" > + depends on HAVE_PCI > + help > + This option enables support for legacy PCI devices. This includes > + PCI devices attached directly or via a bridge on a PCI Express bus. > + It also includes compatibility features on PCI Express devices which > + make use of legacy I/O spaces. All you really care about is the "legacy" I/O spaces here, this isn't tied to PCI specifically at all, right? So why not just have a OLD_STYLE_IO config option or something like that, to show that it's the i/o functions we care about here, not PCI at all? And maybe not call it "old" or "legacy" as time constantly goes forward, just describe it as it is, "DIRECT_IO"? thanks, greg k-h
Em Tue, 28 Dec 2021 09:21:23 +0100 Greg Kroah-Hartman <gregkh@linuxfoundation.org> escreveu: > On Mon, Dec 27, 2021 at 05:42:46PM +0100, Niklas Schnelle wrote: > > --- a/drivers/pci/Kconfig > > +++ b/drivers/pci/Kconfig > > @@ -23,6 +23,17 @@ menuconfig PCI > > > > if PCI > > > > +config LEGACY_PCI > > + bool "Enable support for legacy PCI devices" > > + depends on HAVE_PCI > > + help > > + This option enables support for legacy PCI devices. This includes > > + PCI devices attached directly or via a bridge on a PCI Express bus. > > + It also includes compatibility features on PCI Express devices which > > + make use of legacy I/O spaces. This Kconfig doesn't seem what it is needed there, as this should be an arch-dependent feature, and not something that the poor user should be aware if a given architecture supports it or not. Also, the above will keep causing warnings or errors with randconfigs. Also, the "depends on HAVE_CPI" is bogus, as PCI already depends on HAVE_PCI: menuconfig PCI bool "PCI support" depends on HAVE_PCI help This option enables support for the PCI local bus, including support for PCI-X and the foundations for PCI Express support. Say 'Y' here unless you know what you are doing. So, instead, I would expect that a new HAVE_xxx option would be added at arch/*/Kconfig, like: config X86 ... select HAVE_PCI_DIRECT_IO It would also make sense to document it at Documentation/features/. > > All you really care about is the "legacy" I/O spaces here, this isn't > tied to PCI specifically at all, right? > > So why not just have a OLD_STYLE_IO config option or something like > that, to show that it's the i/o functions we care about here, not PCI at > all? > > And maybe not call it "old" or "legacy" as time constantly goes forward, > just describe it as it is, "DIRECT_IO"? Agreed. HAVE_PCI_DIRECT_IO (or something similar) seems a more appropriate name for it. Thanks, Mauro
On Tue, 2021-12-28 at 10:15 +0100, Mauro Carvalho Chehab wrote: > Em Tue, 28 Dec 2021 09:21:23 +0100 > Greg Kroah-Hartman <gregkh@linuxfoundation.org> escreveu: > > > On Mon, Dec 27, 2021 at 05:42:46PM +0100, Niklas Schnelle wrote: > > > --- a/drivers/pci/Kconfig > > > +++ b/drivers/pci/Kconfig > > > @@ -23,6 +23,17 @@ menuconfig PCI > > > > > > if PCI > > > > > > +config LEGACY_PCI > > > + bool "Enable support for legacy PCI devices" > > > + depends on HAVE_PCI > > > + help > > > + This option enables support for legacy PCI devices. This includes > > > + PCI devices attached directly or via a bridge on a PCI Express bus. > > > + It also includes compatibility features on PCI Express devices which > > > + make use of legacy I/O spaces. > > This Kconfig doesn't seem what it is needed there, as this should be an > arch-dependent feature, and not something that the poor user should be > aware if a given architecture supports it or not. Also, the above will keep > causing warnings or errors with randconfigs. > > Also, the "depends on HAVE_CPI" is bogus, as PCI already depends on > HAVE_PCI: Ah yes you're right. > > menuconfig PCI > bool "PCI support" > depends on HAVE_PCI > help > This option enables support for the PCI local bus, including > support for PCI-X and the foundations for PCI Express support. > Say 'Y' here unless you know what you are doing. > > So, instead, I would expect that a new HAVE_xxx option would be > added at arch/*/Kconfig, like: > > config X86 > ... > select HAVE_PCI_DIRECT_IO > > It would also make sense to document it at Documentation/features/. I'll look into that, thanks. > > > All you really care about is the "legacy" I/O spaces here, this isn't > > tied to PCI specifically at all, right? > > > > So why not just have a OLD_STYLE_IO config option or something like > > that, to show that it's the i/o functions we care about here, not PCI at > > all? > > > > And maybe not call it "old" or "legacy" as time constantly goes forward, > > just describe it as it is, "DIRECT_IO"? > > Agreed. HAVE_PCI_DIRECT_IO (or something similar) seems a more appropriate > name for it. > > Thanks, > Mauro Hmm, I might be missing something here but that sounds a lot like the HAS_IOPORT option added in patch 02. We add both LEGACY_PCI and HAS_IOPORT to differentiate between two cases. HAS_IOPORT is for PC-style devices that are not on a PCI card while LEGACY_PCI is for PCI drivers that require port I/O. This includes pre-PCIe devices as well as PCIe devices which require features like I/O spaces. The "legacy" naming is comes from the PCIe spec which in section 2.1.1.2 says "PCI Express supports I/O Space for compatibility with legacy devices which require their use. Future revisions of this specification may deprecate the use of I/O Space." These two separate config options allow us to compile without support for these legacy PCI devices even on a system where inb()/outb() and friends are required for some PC style devices and for example ACPI.
On Tue, Dec 28, 2021 at 11:58:55AM +0100, Niklas Schnelle wrote: > We add both LEGACY_PCI and HAS_IOPORT to differentiate between two > cases. HAS_IOPORT is for PC-style devices that are not on a PCI card > while LEGACY_PCI is for PCI drivers that require port I/O. This > includes pre-PCIe devices as well as PCIe devices which require > features like I/O spaces. The "legacy" naming is comes from the PCIe > spec which in section 2.1.1.2 says "PCI Express supports I/O Space for > compatibility with legacy devices which require their use. Future > revisions of this specification may deprecate the use of I/O Space." Ah, then mention the reason why this is called LEGACY_PCI is that it is because that is what the PCI spec calls it. It was not obvious here at all that this is where the name came from. thanks, greg k-h
Em Tue, 28 Dec 2021 11:58:55 +0100 Niklas Schnelle <schnelle@linux.ibm.com> escreveu: > On Tue, 2021-12-28 at 10:15 +0100, Mauro Carvalho Chehab wrote: > > Em Tue, 28 Dec 2021 09:21:23 +0100 > > Greg Kroah-Hartman <gregkh@linuxfoundation.org> escreveu: > > > > > On Mon, Dec 27, 2021 at 05:42:46PM +0100, Niklas Schnelle wrote: > > > > --- a/drivers/pci/Kconfig > > > > +++ b/drivers/pci/Kconfig > > > > @@ -23,6 +23,17 @@ menuconfig PCI > > > > > > > > if PCI > > > > > > > > +config LEGACY_PCI > > > > + bool "Enable support for legacy PCI devices" > > > > + depends on HAVE_PCI > > > > + help > > > > + This option enables support for legacy PCI devices. This includes > > > > + PCI devices attached directly or via a bridge on a PCI Express bus. > > > > + It also includes compatibility features on PCI Express devices which > > > > + make use of legacy I/O spaces. > > > > This Kconfig doesn't seem what it is needed there, as this should be an > > arch-dependent feature, and not something that the poor user should be > > aware if a given architecture supports it or not. Also, the above will keep > > causing warnings or errors with randconfigs. > > > > Also, the "depends on HAVE_CPI" is bogus, as PCI already depends on > > HAVE_PCI: > > Ah yes you're right. > > > > > menuconfig PCI > > bool "PCI support" > > depends on HAVE_PCI > > help > > This option enables support for the PCI local bus, including > > support for PCI-X and the foundations for PCI Express support. > > Say 'Y' here unless you know what you are doing. > > > > So, instead, I would expect that a new HAVE_xxx option would be > > added at arch/*/Kconfig, like: > > > > config X86 > > ... > > select HAVE_PCI_DIRECT_IO > > > > It would also make sense to document it at Documentation/features/. > > I'll look into that, thanks. > > > > > > All you really care about is the "legacy" I/O spaces here, this isn't > > > tied to PCI specifically at all, right? > > > > > > So why not just have a OLD_STYLE_IO config option or something like > > > that, to show that it's the i/o functions we care about here, not PCI at > > > all? > > > > > > And maybe not call it "old" or "legacy" as time constantly goes forward, > > > just describe it as it is, "DIRECT_IO"? > > > > Agreed. HAVE_PCI_DIRECT_IO (or something similar) seems a more appropriate > > name for it. > > > > Thanks, > > Mauro > > Hmm, I might be missing something here but that sounds a lot like the > HAS_IOPORT option added in patch 02. > > We add both LEGACY_PCI and HAS_IOPORT to differentiate between two > cases. HAS_IOPORT is for PC-style devices that are not on a PCI card > while LEGACY_PCI is for PCI drivers that require port I/O. I didn't look at the other patches on this series, but why it is needed to deal with them on a separate way? Won't "PCI" and "HAS_IOPORT" be enough? I mean, are there any architecture where HAVE_PCI=y and HAS_IOPORT=y where LEGACY_PCI shall be "n"? > This > includes pre-PCIe devices as well as PCIe devices which require > features like I/O spaces. The "legacy" naming is comes from the PCIe > spec which in section 2.1.1.2 says "PCI Express supports I/O Space for > compatibility with legacy devices which require their use. Future > revisions of this specification may deprecate the use of I/O Space." I would still avoid calling it LEGACY_PCI, as this sounds too generic. I didn't read the PCI/PCIe specs, but I suspect that are a lot more features that were/will be deprecated on PCI specs as time goes by. So, I would, instead, use something like PCI_LEGACY_IO_SPACE or HAVE_PCI_LEGACY_IO_SPACE, in order to let it clear what "legacy" means. > These two separate config options allow us to compile without support > for these legacy PCI devices even on a system where inb()/outb() and > friends are required for some PC style devices and for example ACPI. Hmm... why this patch make SND_BT87X dependent on LEGACY_PCI? > @@ -172,6 +177,7 @@ config SND_AZT3328 > > config SND_BT87X > tristate "Bt87x Audio Capture" > + depends on LEGACY_PCI > select SND_PCM > help > If you want to record audio from TV cards based on I couldn't find any usage of inb/outb & friends on it: $ grep -E '(inb|outb|inw|outw|inl|outl)\b' ./sound/pci/bt87x.c It uses, instead, readl/writel: static inline u32 snd_bt87x_readl(struct snd_bt87x *chip, u32 reg) { return readl(chip->mmio + reg); } static inline void snd_bt87x_writel(struct snd_bt87x *chip, u32 reg, u32 value) { writel(value, chip->mmio + reg); } I failed to see what makes it different from VIDEO_BT848 and DVB_BT8XX drivers. They all support exactly the same chipset: Brooktree/Conexant BT8xx. On those devices, depending on the exact model, up to three separate interfaces are provided, each one with its own Kconfig var: - audio I/O (SND_BT87X); - video I/O (VIDEO_BT848); - MPEG-TS I/O (DVB_BT8XX). Thanks, Mauro
On Tue, 2021-12-28 at 13:54 +0100, Mauro Carvalho Chehab wrote: > ---8<--- > > > > > All you really care about is the "legacy" I/O spaces here, this isn't > > > > tied to PCI specifically at all, right? > > > > > > > > So why not just have a OLD_STYLE_IO config option or something like > > > > that, to show that it's the i/o functions we care about here, not PCI at > > > > all? > > > > > > > > And maybe not call it "old" or "legacy" as time constantly goes forward, > > > > just describe it as it is, "DIRECT_IO"? > > > > > > Agreed. HAVE_PCI_DIRECT_IO (or something similar) seems a more appropriate > > > name for it. > > > > > > Thanks, > > > Mauro > > > > Hmm, I might be missing something here but that sounds a lot like the > > HAS_IOPORT option added in patch 02. > > > > We add both LEGACY_PCI and HAS_IOPORT to differentiate between two > > cases. HAS_IOPORT is for PC-style devices that are not on a PCI card > > while LEGACY_PCI is for PCI drivers that require port I/O. > > I didn't look at the other patches on this series, but why it is needed > to deal with them on a separate way? Won't "PCI" and "HAS_IOPORT" be enough? > > I mean, are there any architecture where HAVE_PCI=y and HAS_IOPORT=y > where LEGACY_PCI shall be "n"? In the current patch set LEGACY_PCI is not currently selected by architectures, though of course it could be if we know that an architecture requires it. We should probably also set it in any defconfig that has devices depending on it so as not to break these. Other than that it would be set during kernel configuration if one wants/needs support for legacy PCI devices. For testing I ran with HAVE_PCI=y, HAS_IOPORT=y and LEGACY_PCI=n on both my local Ryzen 3990X based workstation and Raspberry Pi 4 (DT). I guess at the moment it would make most sense for special configs such as those tailored for vitualization guets but in the end that would be something for distributions to decide. Arnd described the options here: https://lore.kernel.org/lkml/CAK8P3a3HHeP+Gw_k2P7Qtig0OmErf0HN30G22+qHic_uZTh11Q@mail.gmail.com/ > > > This > > includes pre-PCIe devices as well as PCIe devices which require > > features like I/O spaces. The "legacy" naming is comes from the PCIe > > spec which in section 2.1.1.2 says "PCI Express supports I/O Space for > > compatibility with legacy devices which require their use. Future > > revisions of this specification may deprecate the use of I/O Space." > > I would still avoid calling it LEGACY_PCI, as this sounds too generic. > > I didn't read the PCI/PCIe specs, but I suspect that are a lot more > features that were/will be deprecated on PCI specs as time goes by. > > So, I would, instead, use something like PCI_LEGACY_IO_SPACE or > HAVE_PCI_LEGACY_IO_SPACE, in order to let it clear what "legacy" > means. Hmm, I'd like to hear Bjorn's opinion on this. Personally I feel like LEGACY_PCI is pretty clear since most devices are either pre-PCIe devices or a compatibility feature allowing drivers for a pre-PCIe device to work with a PCIe device. > > > These two separate config options allow us to compile without support > > for these legacy PCI devices even on a system where inb()/outb() and > > friends are required for some PC style devices and for example ACPI. > > Hmm... why this patch make SND_BT87X dependent on LEGACY_PCI? > > > @@ -172,6 +177,7 @@ config SND_AZT3328 > > > > config SND_BT87X > > tristate "Bt87x Audio Capture" > > + depends on LEGACY_PCI > > select SND_PCM > > help > > If you want to record audio from TV cards based on > > I couldn't find any usage of inb/outb & friends on it: > > $ grep -E '(inb|outb|inw|outw|inl|outl)\b' ./sound/pci/bt87x.c > > It uses, instead, readl/writel: > > static inline u32 snd_bt87x_readl(struct snd_bt87x *chip, u32 reg) > { > return readl(chip->mmio + reg); > } > > static inline void snd_bt87x_writel(struct snd_bt87x *chip, u32 reg, u32 value) > { > writel(value, chip->mmio + reg); > } > > I failed to see what makes it different from VIDEO_BT848 and > DVB_BT8XX drivers. They all support exactly the same chipset: > Brooktree/Conexant BT8xx. On those devices, depending on the exact > model, up to three separate interfaces are provided, each one with > its own Kconfig var: > > - audio I/O (SND_BT87X); > - video I/O (VIDEO_BT848); > - MPEG-TS I/O (DVB_BT8XX). > > Thanks, > Mauro You're right, that makes no sense this doesn't seem to require LEGACY_PCI. Maybe this was added by Arnd because it lacks a "depends on PCI" which could have caused issues with HAVE_PCI=n rand configs.
Em Tue, 28 Dec 2021 16:06:44 +0100 Niklas Schnelle <schnelle@linux.ibm.com> escreveu: (on a side note: the c/c list of this patch is too long. I would try to avoid using a too long list, as otherwise this e-mail may end being rejected by mail servers) > On Tue, 2021-12-28 at 13:54 +0100, Mauro Carvalho Chehab wrote: > > > ---8<--- > > > > > > > All you really care about is the "legacy" I/O spaces here, this isn't > > > > > tied to PCI specifically at all, right? > > > > > > > > > > So why not just have a OLD_STYLE_IO config option or something like > > > > > that, to show that it's the i/o functions we care about here, not PCI at > > > > > all? > > > > > > > > > > And maybe not call it "old" or "legacy" as time constantly goes forward, > > > > > just describe it as it is, "DIRECT_IO"? > > > > > > > > Agreed. HAVE_PCI_DIRECT_IO (or something similar) seems a more appropriate > > > > name for it. > > > > > > > > Thanks, > > > > Mauro > > > > > > Hmm, I might be missing something here but that sounds a lot like the > > > HAS_IOPORT option added in patch 02. > > > > > > We add both LEGACY_PCI and HAS_IOPORT to differentiate between two > > > cases. HAS_IOPORT is for PC-style devices that are not on a PCI card > > > while LEGACY_PCI is for PCI drivers that require port I/O. > > > > I didn't look at the other patches on this series, but why it is needed > > to deal with them on a separate way? Won't "PCI" and "HAS_IOPORT" be enough? > > > > I mean, are there any architecture where HAVE_PCI=y and HAS_IOPORT=y > > where LEGACY_PCI shall be "n"? > > In the current patch set LEGACY_PCI is not currently selected by > architectures, though of course it could be if we know that an > architecture requires it. We should probably also set it in any > defconfig that has devices depending on it so as not to break these. > > Other than that it would be set during kernel configuration if one > wants/needs support for legacy PCI devices. For testing I ran with > HAVE_PCI=y, HAS_IOPORT=y and LEGACY_PCI=n on both my local Ryzen 3990X > based workstation and Raspberry Pi 4 (DT). I guess at the moment it > would make most sense for special configs such as those tailored for > vitualization guets but in the end that would be something for > distributions to decide. IMO, it makes sense to have a "default y" there, as on systems that support I/O space, disabling it will just randomly disable some drivers that could be required by some hardware. I won't doubt that some of those could be ported from using inb/outb to use, instead, readb/writeb. > > Arnd described the options here: > https://lore.kernel.org/lkml/CAK8P3a3HHeP+Gw_k2P7Qtig0OmErf0HN30G22+qHic_uZTh11Q@mail.gmail.com/ Based on Arnd's description, LEGACY_PCI should depend on HAS_IOPORT. This is missing on patch 1. You should probably reorder your patch series to first create HAS_IOPORT and then add LEGACY_PCI with depends on, as otherwise it may cause randconfig build issues at robots and/or git bisect. I would also suggest to first introduce such change and then send a per-subsystem LEGACY_PCI patch, as it would be a lot easier for maintainers to review. > > > > > > This > > > includes pre-PCIe devices as well as PCIe devices which require > > > features like I/O spaces. The "legacy" naming is comes from the PCIe > > > spec which in section 2.1.1.2 says "PCI Express supports I/O Space for > > > compatibility with legacy devices which require their use. Future > > > revisions of this specification may deprecate the use of I/O Space." > > > > I would still avoid calling it LEGACY_PCI, as this sounds too generic. > > > > I didn't read the PCI/PCIe specs, but I suspect that are a lot more > > features that were/will be deprecated on PCI specs as time goes by. > > > > So, I would, instead, use something like PCI_LEGACY_IO_SPACE or > > HAVE_PCI_LEGACY_IO_SPACE, in order to let it clear what "legacy" > > means. > > Hmm, I'd like to hear Bjorn's opinion on this. Personally I feel like > LEGACY_PCI is pretty clear since most devices are either pre-PCIe > devices or a compatibility feature allowing drivers for a pre-PCIe > device to work with a PCIe device. That's the main point: it is *not* disabling pre-PCIe devices or even legacy PCI drivers. It just disables a random set of drivers just because they use inb/outb instead of readb/writeb. It keeps several pure PCI drivers selected, and disables some PCIe for no real reason. Just to give one example, this symbol: > diff --git a/drivers/media/cec/platform/Kconfig b/drivers/media/cec/platform/Kconfig > index b672d3142eb7..5e92ece5b104 100644 > --- a/drivers/media/cec/platform/Kconfig > +++ b/drivers/media/cec/platform/Kconfig > @@ -100,7 +100,7 @@ config CEC_TEGRA > config CEC_SECO > tristate "SECO Boards HDMI CEC driver" > depends on (X86 || IA64) || COMPILE_TEST > - depends on PCI && DMI > + depends on LEGACY_PCI && DMI > select CEC_CORE > select CEC_NOTIFIER > help Disables HDMI CEC support on some Intel motherboards. Any distro meant to run on generic hardware should keep it selected. I can see some value of a "PCI_LEGACY" option to disable all non-PCIe drivers, but this is not the case here. Thanks, Mauro
On Tue, 2021-12-28 at 18:12 +0100, Mauro Carvalho Chehab wrote: > Em Tue, 28 Dec 2021 16:06:44 +0100 > Niklas Schnelle <schnelle@linux.ibm.com> escreveu: > > (on a side note: the c/c list of this patch is too long. I would try to > avoid using a too long list, as otherwise this e-mail may end being rejected > by mail servers) > > > On Tue, 2021-12-28 at 13:54 +0100, Mauro Carvalho Chehab wrote: > > > > > ---8<--- > > > > > > > > > All you really care about is the "legacy" I/O spaces here, this isn't > > > > > > tied to PCI specifically at all, right? > > > > > > > > > > > > So why not just have a OLD_STYLE_IO config option or something like > > > > > > that, to show that it's the i/o functions we care about here, not PCI at > > > > > > all? > > > > > > > > > > > > And maybe not call it "old" or "legacy" as time constantly goes forward, > > > > > > just describe it as it is, "DIRECT_IO"? > > > > > > > > > > Agreed. HAVE_PCI_DIRECT_IO (or something similar) seems a more appropriate > > > > > name for it. > > > > > > > > > > Thanks, > > > > > Mauro > > > > > > > > Hmm, I might be missing something here but that sounds a lot like the > > > > HAS_IOPORT option added in patch 02. > > > > > > > > We add both LEGACY_PCI and HAS_IOPORT to differentiate between two > > > > cases. HAS_IOPORT is for PC-style devices that are not on a PCI card > > > > while LEGACY_PCI is for PCI drivers that require port I/O. > > > > > > I didn't look at the other patches on this series, but why it is needed > > > to deal with them on a separate way? Won't "PCI" and "HAS_IOPORT" be enough? > > > > > > I mean, are there any architecture where HAVE_PCI=y and HAS_IOPORT=y > > > where LEGACY_PCI shall be "n"? > > > > In the current patch set LEGACY_PCI is not currently selected by > > architectures, though of course it could be if we know that an > > architecture requires it. We should probably also set it in any > > defconfig that has devices depending on it so as not to break these. > > > > Other than that it would be set during kernel configuration if one > > wants/needs support for legacy PCI devices. For testing I ran with > > HAVE_PCI=y, HAS_IOPORT=y and LEGACY_PCI=n on both my local Ryzen 3990X > > based workstation and Raspberry Pi 4 (DT). I guess at the moment it > > would make most sense for special configs such as those tailored for > > vitualization guets but in the end that would be something for > > distributions to decide. > > IMO, it makes sense to have a "default y" there, as on systems that > support I/O space, disabling it will just randomly disable some drivers > that could be required by some hardware. I won't doubt that some of > those could be ported from using inb/outb to use, instead, readb/writeb. Makes sense, if these get more legacy over time we can always change the default. This would also mean we don't need to change defconfigs that include legacy PCI devices. > > > Arnd described the options here: > > https://lore.kernel.org/lkml/CAK8P3a3HHeP+Gw_k2P7Qtig0OmErf0HN30G22+qHic_uZTh11Q@mail.gmail.com/ > > Based on Arnd's description, LEGACY_PCI should depend on HAS_IOPORT. > This is missing on patch 1. You should probably reorder your patch > series to first create HAS_IOPORT and then add LEGACY_PCI with > depends on, as otherwise it may cause randconfig build issues > at robots and/or git bisect. > > I would also suggest to first introduce such change and then send > a per-subsystem LEGACY_PCI patch, as it would be a lot easier for > maintainers to review. Playing around with the reordering I think it might make sense to introduce HAS_IOPORT in patch 01, then LEGACY_PCI in patch 02 and then add dependencies for both on a per subsystem basis. I think it would be overkill to have two series of per subsystem patches. > > > > > > > > This > > > > includes pre-PCIe devices as well as PCIe devices which require > > > > features like I/O spaces. The "legacy" naming is comes from the PCIe > > > > spec which in section 2.1.1.2 says "PCI Express supports I/O Space for > > > > compatibility with legacy devices which require their use. Future > > > > revisions of this specification may deprecate the use of I/O Space." > > > > > > I would still avoid calling it LEGACY_PCI, as this sounds too generic. > > > > > > I didn't read the PCI/PCIe specs, but I suspect that are a lot more > > > features that were/will be deprecated on PCI specs as time goes by. > > > > > > So, I would, instead, use something like PCI_LEGACY_IO_SPACE or > > > HAVE_PCI_LEGACY_IO_SPACE, in order to let it clear what "legacy" > > > means. > > > > Hmm, I'd like to hear Bjorn's opinion on this. Personally I feel like > > LEGACY_PCI is pretty clear since most devices are either pre-PCIe > > devices or a compatibility feature allowing drivers for a pre-PCIe > > device to work with a PCIe device. > > That's the main point: it is *not* disabling pre-PCIe devices or > even legacy PCI drivers. It just disables a random set of drivers just > because they use inb/outb instead of readb/writeb. It keeps several pure > PCI drivers selected, and disables some PCIe for no real reason. That is not intentional. The dependencies are certainly not perfect yet which is one of the reasons this is still an RFC. I hope getting these right will be a lot easier if we do both LEGACY_PCI and HAS_IOPORT dependency selection on a per subsystem basis. > > Just to give one example, this symbol: > > > diff --git a/drivers/media/cec/platform/Kconfig b/drivers/media/cec/platform/Kconfig > > index b672d3142eb7..5e92ece5b104 100644 > > --- a/drivers/media/cec/platform/Kconfig > > +++ b/drivers/media/cec/platform/Kconfig > > @@ -100,7 +100,7 @@ config CEC_TEGRA > > config CEC_SECO > > tristate "SECO Boards HDMI CEC driver" > > depends on (X86 || IA64) || COMPILE_TEST > > - depends on PCI && DMI > > + depends on LEGACY_PCI && DMI > > select CEC_CORE > > select CEC_NOTIFIER > > help > > Disables HDMI CEC support on some Intel motherboards. > Any distro meant to run on generic hardware should keep it selected. As far as I can see this one actually uses a hardcoded I/O port numbers and googling it looks like it's an on-board device on the UDOO x86 board. I guess that should indeed just be "depends on PCI && DMI && HAS_IOPORT". > > I can see some value of a "PCI_LEGACY" option to disable all > non-PCIe drivers, but this is not the case here. > > Thanks, > Mauro Ok, I think we definitely need to work on getting the dependencies right. I do think we agree that once done correctly there is value in such an option independent of HAS_IOPORT only gating inb() etc uses.
Em Wed, 29 Dec 2021 12:45:38 +0100 Niklas Schnelle <schnelle@linux.ibm.com> escreveu: > On Tue, 2021-12-28 at 18:12 +0100, Mauro Carvalho Chehab wrote: > > Em Tue, 28 Dec 2021 16:06:44 +0100 > > Niklas Schnelle <schnelle@linux.ibm.com> escreveu: > > > > (on a side note: the c/c list of this patch is too long. I would try to > > avoid using a too long list, as otherwise this e-mail may end being rejected > > by mail servers) > > > > > On Tue, 2021-12-28 at 13:54 +0100, Mauro Carvalho Chehab wrote: > > > > > > > ---8<--- > > > > > > > > > > > All you really care about is the "legacy" I/O spaces here, this isn't > > > > > > > tied to PCI specifically at all, right? > > > > > > > > > > > > > > So why not just have a OLD_STYLE_IO config option or something like > > > > > > > that, to show that it's the i/o functions we care about here, not PCI at > > > > > > > all? > > > > > > > > > > > > > > And maybe not call it "old" or "legacy" as time constantly goes forward, > > > > > > > just describe it as it is, "DIRECT_IO"? > > > > > > > > > > > > Agreed. HAVE_PCI_DIRECT_IO (or something similar) seems a more appropriate > > > > > > name for it. > > > > > > > > > > > > Thanks, > > > > > > Mauro > > > > > > > > > > Hmm, I might be missing something here but that sounds a lot like the > > > > > HAS_IOPORT option added in patch 02. > > > > > > > > > > We add both LEGACY_PCI and HAS_IOPORT to differentiate between two > > > > > cases. HAS_IOPORT is for PC-style devices that are not on a PCI card > > > > > while LEGACY_PCI is for PCI drivers that require port I/O. > > > > > > > > I didn't look at the other patches on this series, but why it is needed > > > > to deal with them on a separate way? Won't "PCI" and "HAS_IOPORT" be enough? > > > > > > > > I mean, are there any architecture where HAVE_PCI=y and HAS_IOPORT=y > > > > where LEGACY_PCI shall be "n"? > > > > > > In the current patch set LEGACY_PCI is not currently selected by > > > architectures, though of course it could be if we know that an > > > architecture requires it. We should probably also set it in any > > > defconfig that has devices depending on it so as not to break these. > > > > > > Other than that it would be set during kernel configuration if one > > > wants/needs support for legacy PCI devices. For testing I ran with > > > HAVE_PCI=y, HAS_IOPORT=y and LEGACY_PCI=n on both my local Ryzen 3990X > > > based workstation and Raspberry Pi 4 (DT). I guess at the moment it > > > would make most sense for special configs such as those tailored for > > > vitualization guets but in the end that would be something for > > > distributions to decide. > > > > IMO, it makes sense to have a "default y" there, as on systems that > > support I/O space, disabling it will just randomly disable some drivers > > that could be required by some hardware. I won't doubt that some of > > those could be ported from using inb/outb to use, instead, readb/writeb. > > Makes sense, if these get more legacy over time we can always change > the default. This would also mean we don't need to change defconfigs > that include legacy PCI devices. Yes. > > > > > Arnd described the options here: > > > https://lore.kernel.org/lkml/CAK8P3a3HHeP+Gw_k2P7Qtig0OmErf0HN30G22+qHic_uZTh11Q@mail.gmail.com/ > > > > Based on Arnd's description, LEGACY_PCI should depend on HAS_IOPORT. > > This is missing on patch 1. You should probably reorder your patch > > series to first create HAS_IOPORT and then add LEGACY_PCI with > > depends on, as otherwise it may cause randconfig build issues > > at robots and/or git bisect. > > > > I would also suggest to first introduce such change and then send > > a per-subsystem LEGACY_PCI patch, as it would be a lot easier for > > maintainers to review. > > Playing around with the reordering I think it might make sense to > introduce HAS_IOPORT in patch 01, then LEGACY_PCI in patch 02 and then > add dependencies for both on a per subsystem basis. I think it would be > overkill to have two series of per subsystem patches. Makes sense to me. Yeah, a single series should work. > > > > > > > > > > > This > > > > > includes pre-PCIe devices as well as PCIe devices which require > > > > > features like I/O spaces. The "legacy" naming is comes from the PCIe > > > > > spec which in section 2.1.1.2 says "PCI Express supports I/O Space for > > > > > compatibility with legacy devices which require their use. Future > > > > > revisions of this specification may deprecate the use of I/O Space." > > > > > > > > I would still avoid calling it LEGACY_PCI, as this sounds too generic. > > > > > > > > I didn't read the PCI/PCIe specs, but I suspect that are a lot more > > > > features that were/will be deprecated on PCI specs as time goes by. > > > > > > > > So, I would, instead, use something like PCI_LEGACY_IO_SPACE or > > > > HAVE_PCI_LEGACY_IO_SPACE, in order to let it clear what "legacy" > > > > means. > > > > > > Hmm, I'd like to hear Bjorn's opinion on this. Personally I feel like > > > LEGACY_PCI is pretty clear since most devices are either pre-PCIe > > > devices or a compatibility feature allowing drivers for a pre-PCIe > > > device to work with a PCIe device. > > > > That's the main point: it is *not* disabling pre-PCIe devices or > > even legacy PCI drivers. It just disables a random set of drivers just > > because they use inb/outb instead of readb/writeb. It keeps several pure > > PCI drivers selected, and disables some PCIe for no real reason. > > That is not intentional. The dependencies are certainly not perfect yet > which is one of the reasons this is still an RFC. I hope getting these > right will be a lot easier if we do both LEGACY_PCI and HAS_IOPORT > dependency selection on a per subsystem basis. Ok. > > > > Just to give one example, this symbol: > > > > > diff --git a/drivers/media/cec/platform/Kconfig b/drivers/media/cec/platform/Kconfig > > > index b672d3142eb7..5e92ece5b104 100644 > > > --- a/drivers/media/cec/platform/Kconfig > > > +++ b/drivers/media/cec/platform/Kconfig > > > @@ -100,7 +100,7 @@ config CEC_TEGRA > > > config CEC_SECO > > > tristate "SECO Boards HDMI CEC driver" > > > depends on (X86 || IA64) || COMPILE_TEST > > > - depends on PCI && DMI > > > + depends on LEGACY_PCI && DMI > > > select CEC_CORE > > > select CEC_NOTIFIER > > > help > > > > Disables HDMI CEC support on some Intel motherboards. > > Any distro meant to run on generic hardware should keep it selected. > > As far as I can see this one actually uses a hardcoded I/O port numbers > and googling it looks like it's an on-board device on the UDOO x86 > board. I guess that should indeed just be > "depends on PCI && DMI && HAS_IOPORT". Agreed. > > > > > I can see some value of a "PCI_LEGACY" option to disable all > > non-PCIe drivers, but this is not the case here. > > > > Thanks, > > Mauro > > Ok, I think we definitely need to work on getting the dependencies > right. Yes. > I do think we agree that once done correctly there is value in > such an option independent of HAS_IOPORT only gating inb() etc uses. Personally, I don't see much value on a Kconfig var for legacy PCI I/O space. From maintenance PoV, bots won't be triggered if someone use HAS_IOPORT instead of the PCI specific one - or vice-versa. So, we could end having a mix of both at the wrong places, in long term. Also, assuming that PCIe hardware will some day abandon support for "legacy" PCI I/O space, I guess some runtime logic would be needed, in order to work with both kinds of PCIe controllers. So, having a Kconfig option won't help much, IMO. So, my personal preference would be to have just one Kconfig var, but I'm ok if the PCI maintainers decide otherwise. Thanks, Mauro
On Wed, Dec 29, 2021 at 01:12:07PM +0100, Mauro Carvalho Chehab wrote: > Em Wed, 29 Dec 2021 12:45:38 +0100 > Niklas Schnelle <schnelle@linux.ibm.com> escreveu: > > ... > > I do think we agree that once done correctly there is value in > > such an option independent of HAS_IOPORT only gating inb() etc uses. I'm not sure I'm convinced about this. For s390, you could do this patch series, where you don't define inb() at all, and you add new dependencies to prevent compile errors. Or you could define inb() to return ~0, which is what happens on other platforms when the device is not present. > Personally, I don't see much value on a Kconfig var for legacy PCI I/O > space. From maintenance PoV, bots won't be triggered if someone use > HAS_IOPORT instead of the PCI specific one - or vice-versa. So, we > could end having a mix of both at the wrong places, in long term. > > Also, assuming that PCIe hardware will some day abandon support for > "legacy" PCI I/O space, I guess some runtime logic would be needed, > in order to work with both kinds of PCIe controllers. So, having a > Kconfig option won't help much, IMO. > > So, my personal preference would be to have just one Kconfig var, but > I'm ok if the PCI maintainers decide otherwise. I don't really like the "LEGACY_PCI" Kconfig option. "Legacy" just means something old and out of favor; it doesn't say *what* that something is. I think you're specifically interested in I/O port space usage, and it seems that you want all PCI drivers that *only* use I/O port space to depend on LEGACY_PCI? Drivers that can use either I/O or memory space or both would not depend on LEGACY_PCI? This seems a little murky and error-prone. What if you used the approach from [1] but just dropped the warning? The inb() would return ~0 if the platform doesn't support I/O port space. Drivers should be prepared to handle that because that's what happens if the device doesn't exist. HAS_IOPORT and LEGACY_PCI is a lot of Kconfiggery that basically just avoids building drivers that aren't useful on s390. I'm not sure the benefit outweighs the complication. Bjorn [1] https://lore.kernel.org/lkml/CAHk-=wg80je=K7madF4e7WrRNp37e3qh6y10Svhdc7O8SZ_-8g@mail.gmail.com/
On Wed, 2021-12-29 at 10:03 -0600, Bjorn Helgaas wrote: > On Wed, Dec 29, 2021 at 01:12:07PM +0100, Mauro Carvalho Chehab wrote: > > Em Wed, 29 Dec 2021 12:45:38 +0100 > > Niklas Schnelle <schnelle@linux.ibm.com> escreveu: > > > ... > > > I do think we agree that once done correctly there is value in > > > such an option independent of HAS_IOPORT only gating inb() etc uses. > > I'm not sure I'm convinced about this. For s390, you could do this > patch series, where you don't define inb() at all, and you add new > dependencies to prevent compile errors. Or you could define inb() to > return ~0, which is what happens on other platforms when the device is > not present. > > > Personally, I don't see much value on a Kconfig var for legacy PCI I/O > > space. From maintenance PoV, bots won't be triggered if someone use > > HAS_IOPORT instead of the PCI specific one - or vice-versa. So, we > > could end having a mix of both at the wrong places, in long term. > > > > Also, assuming that PCIe hardware will some day abandon support for > > "legacy" PCI I/O space, I guess some runtime logic would be needed, > > in order to work with both kinds of PCIe controllers. So, having a > > Kconfig option won't help much, IMO. > > > > So, my personal preference would be to have just one Kconfig var, but > > I'm ok if the PCI maintainers decide otherwise. > > I don't really like the "LEGACY_PCI" Kconfig option. "Legacy" just > means something old and out of favor; it doesn't say *what* that > something is. > > I think you're specifically interested in I/O port space usage, and it > seems that you want all PCI drivers that *only* use I/O port space to > depend on LEGACY_PCI? Drivers that can use either I/O or memory > space or both would not depend on LEGACY_PCI? This seems a little > murky and error-prone. I'd like to hear Arnd's opinion on this but you're the PCI maintainer so of course your buy-in would be quite important for such an option. > > What if you used the approach from [1] but just dropped the warning? > The inb() would return ~0 if the platform doesn't support I/O port > space. Drivers should be prepared to handle that because that's what > happens if the device doesn't exist. Hmm, in that mail Linus very clearly and specifically asked for this to be a compile-time thing. So, if we do want to make it compile-time but keep the potential errors to a minimum I guess just having HAS_IOPORT might be valid compromise. It gets caught by bots through allyesconfig or randconfig on HAS_IOPORT=n architectures. Also it has a nice symmetry with the existing HAS_IOMEM. > > > HAS_IOPORT and LEGACY_PCI is a lot of Kconfiggery that basically just > avoids building drivers that aren't useful on s390. I'm not sure the > benefit outweighs the complication. > > Bjorn > > [1] https://lore.kernel.org/lkml/CAHk-=wg80je=K7madF4e7WrRNp37e3qh6y10Svhdc7O8SZ_-8g@mail.gmail.com/ > Despite s390 I believe it would also affect nds32, um, h8300, nios2, openrisc, hexagon, csky, and xtensa. But yes none of these is any less niche than us. I do wonder if we will see a new drivers using I/O ports?
On 29/12/2021 16:55, Niklas Schnelle wrote: > On Wed, 2021-12-29 at 10:03 -0600, Bjorn Helgaas wrote: >> On Wed, Dec 29, 2021 at 01:12:07PM +0100, Mauro Carvalho Chehab wrote: >>> Em Wed, 29 Dec 2021 12:45:38 +0100 >>> Niklas Schnelle<schnelle@linux.ibm.com> escreveu: >>>> ... >>>> I do think we agree that once done correctly there is value in >>>> such an option independent of HAS_IOPORT only gating inb() etc uses. >> I'm not sure I'm convinced about this. For s390, you could do this >> patch series, where you don't define inb() at all, and you add new >> dependencies to prevent compile errors. Or you could define inb() to >> return ~0, which is what happens on other platforms when the device is >> not present. >> >>> Personally, I don't see much value on a Kconfig var for legacy PCI I/O >>> space. From maintenance PoV, bots won't be triggered if someone use >>> HAS_IOPORT instead of the PCI specific one - or vice-versa. So, we >>> could end having a mix of both at the wrong places, in long term. >>> >>> Also, assuming that PCIe hardware will some day abandon support for >>> "legacy" PCI I/O space, I guess some runtime logic would be needed, >>> in order to work with both kinds of PCIe controllers. So, having a >>> Kconfig option won't help much, IMO. >>> >>> So, my personal preference would be to have just one Kconfig var, but >>> I'm ok if the PCI maintainers decide otherwise. >> I don't really like the "LEGACY_PCI" Kconfig option. "Legacy" just >> means something old and out of favor; it doesn't say*what* that >> something is. >> >> I think you're specifically interested in I/O port space usage, and it >> seems that you want all PCI drivers that*only* use I/O port space to >> depend on LEGACY_PCI? Drivers that can use either I/O or memory >> space or both would not depend on LEGACY_PCI? This seems a little >> murky and error-prone. > I'd like to hear Arnd's opinion on this but you're the PCI maintainer > so of course your buy-in would be quite important for such an option. > Hi Niklas, I can't see the value in the LEGACY_PCI config - however I don't really understand Arnd's original intention. It was written that it would allow us to control "whether we have any pre-PCIe devices or those PCIe drivers that need PIO accessors other than ioport_map()/pci_iomap()". However I just don't see why CONFIG_PCI=y and CONFIG_HAS_IOPORT=y aren't always the gating factor here. Arnd? Thanks, John
On Wed, Jan 05, 2022 at 05:42:16PM +0000, John Garry wrote: > On 29/12/2021 16:55, Niklas Schnelle wrote: > > On Wed, 2021-12-29 at 10:03 -0600, Bjorn Helgaas wrote: > > > On Wed, Dec 29, 2021 at 01:12:07PM +0100, Mauro Carvalho Chehab wrote: > > > > Em Wed, 29 Dec 2021 12:45:38 +0100 > > > > Niklas Schnelle<schnelle@linux.ibm.com> escreveu: > > > > > ... > > > > > I do think we agree that once done correctly there is value in > > > > > such an option independent of HAS_IOPORT only gating inb() etc uses. > > > I'm not sure I'm convinced about this. For s390, you could do this > > > patch series, where you don't define inb() at all, and you add new > > > dependencies to prevent compile errors. Or you could define inb() to > > > return ~0, which is what happens on other platforms when the device is > > > not present. > > > > > > > Personally, I don't see much value on a Kconfig var for legacy PCI I/O > > > > space. From maintenance PoV, bots won't be triggered if someone use > > > > HAS_IOPORT instead of the PCI specific one - or vice-versa. So, we > > > > could end having a mix of both at the wrong places, in long term. > > > > > > > > Also, assuming that PCIe hardware will some day abandon support for > > > > "legacy" PCI I/O space, I guess some runtime logic would be needed, > > > > in order to work with both kinds of PCIe controllers. So, having a > > > > Kconfig option won't help much, IMO. > > > > > > > > So, my personal preference would be to have just one Kconfig var, but > > > > I'm ok if the PCI maintainers decide otherwise. > > > I don't really like the "LEGACY_PCI" Kconfig option. "Legacy" just > > > means something old and out of favor; it doesn't say*what* that > > > something is. > > > > > > I think you're specifically interested in I/O port space usage, and it > > > seems that you want all PCI drivers that *only* use I/O port space to > > > depend on LEGACY_PCI? Drivers that can use either I/O or memory > > > space or both would not depend on LEGACY_PCI? This seems a little > > > murky and error-prone. > > I'd like to hear Arnd's opinion on this but you're the PCI maintainer > > so of course your buy-in would be quite important for such an option. I'd like to hear Arnd's opinion, too. If we do add LEGACY_PCI, I think we need a clear guide for when to use it, e.g., "a PCI driver that uses inb() must depend on LEGACY_PCI" or whatever it is. I must be missing something because I don't see what we gain from this. We have PCI drivers, e.g., megaraid [1], for devices that have either MEM or I/O BARs. I think we want to build drivers like that on any arch that supports PCI. If the arch doesn't support I/O port space, devices that only have I/O BARs won't work, of course, and hopefully the PCI core and driver can figure that out and gracefully fail the probe. But that same driver should still work with devices that have MEM BARs. If inb() isn't always present, I guess we could litter these drivers with #ifdefs, but that would be pretty ugly. IMO inb() should be present but do something innocuous like return ~0, as it would if I/O port space is supported but there's no device at that address. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/megaraid.c?id=v5.15#n4210 > I can't see the value in the LEGACY_PCI config - however I don't really > understand Arnd's original intention. > > It was written that it would allow us to control "whether we have any > pre-PCIe devices or those PCIe drivers that need PIO accessors other than > ioport_map()/pci_iomap()". > > However I just don't see why CONFIG_PCI=y and CONFIG_HAS_IOPORT=y aren't > always the gating factor here. Arnd? > > Thanks, > John
On 05/01/2022 19:47, Bjorn Helgaas wrote: >>>>> ok if the PCI maintainers decide otherwise. >>>> I don't really like the "LEGACY_PCI" Kconfig option. "Legacy" just >>>> means something old and out of favor; it doesn't say*what* that >>>> something is. >>>> >>>> I think you're specifically interested in I/O port space usage, and it >>>> seems that you want all PCI drivers that*only* use I/O port space to >>>> depend on LEGACY_PCI? Drivers that can use either I/O or memory >>>> space or both would not depend on LEGACY_PCI? This seems a little >>>> murky and error-prone. >>> I'd like to hear Arnd's opinion on this but you're the PCI maintainer >>> so of course your buy-in would be quite important for such an option. > I'd like to hear Arnd's opinion, too. If we do add LEGACY_PCI, I > think we need a clear guide for when to use it, e.g., "a PCI driver > that uses inb() must depend on LEGACY_PCI" or whatever it is. > > I must be missing something because I don't see what we gain from > this. We have PCI drivers, e.g., megaraid [1], for devices that have > either MEM or I/O BARs. I think we want to build drivers like that on > any arch that supports PCI. > > If the arch doesn't support I/O port space, devices that only have I/O > BARs won't work, of course, and hopefully the PCI core and driver can > figure that out and gracefully fail the probe. > > But that same driver should still work with devices that have MEM > BARs. If inb() isn't always present, I guess we could litter these > drivers with #ifdefs, but that would be pretty ugly. There were some ifdefs added to the 8250 drivers in Arnd's original patch [0], but it does not seem included here. Niklas, what happened to the 8250 and the other driver changes? [0] https://lore.kernel.org/lkml/CAK8P3a0MNbx-iuzW_-=0ab6-TTZzwV-PT_6gAC1Gp5PgYyHcrA@mail.gmail.com/ > IMO inb() should > be present but do something innocuous like return ~0, as it would if > I/O port space is supported but there's no device at that address. > > [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/megaraid.c?id=v5.15#n4210 > That driver would prob not be used on systems which does not support PIO, and so could have a HAS_IOPORT dependency. But it is not strictly necessary. Anyway, it would be good to have an idea of how much ifdeffery is required in drivers. Thanks, John
On Thu, Jan 06, 2022 at 05:41:00PM +0000, John Garry wrote: > On 05/01/2022 19:47, Bjorn Helgaas wrote: > > IMO inb() should > > be present but do something innocuous like return ~0, as it would if > > I/O port space is supported but there's no device at that address. > > > > [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/megaraid.c?id=v5.15#n4210 > > > > That driver would prob not be used on systems which does not support PIO, > and so could have a HAS_IOPORT dependency. But it is not strictly necessary. I don't want the path of "this driver isn't needed because the device is unlikely to be used on this arch." Maybe it's not _always_ possible, but if the device can be plugged into the platform, I think we should be able to build the driver for it. If the device requires I/O port space and the platform doesn't support it, the PCI core or the driver should detect that and give a useful diagnostic. Bjorn
On 06/01/2022 18:14, Bjorn Helgaas wrote: >> That driver would prob not be used on systems which does not support PIO, >> and so could have a HAS_IOPORT dependency. But it is not strictly necessary. > I don't want the path of "this driver isn't needed because the device > is unlikely to be used on this arch." Sure, that was just a one off example. As I mentioned before, I think that Arnd already did most of the ifdeffery work, but it was not included in this series. > > Maybe it's not_always_ possible, but if the device can be plugged > into the platform, I think we should be able to build the driver for > it. > > If the device requires I/O port space and the platform doesn't support > it, the PCI core or the driver should detect that and give a useful > diagnostic. > I'm not sure what the driver can say apart from -ENODEV. Or IO port management in resource.c could warn for requesting IO port region when it's unsupported. Anyway, this same conversion was had with Linus before I got involved. If you think it is worth discussing again then I suppose the authors here need to gain consensus. Thanks, John
On Thu, 2022-01-06 at 17:41 +0000, John Garry wrote: > On 05/01/2022 19:47, Bjorn Helgaas wrote: > > > > > > ok if the PCI maintainers decide otherwise. > > > > > I don't really like the "LEGACY_PCI" Kconfig option. "Legacy" just > > > > > means something old and out of favor; it doesn't say*what* that > > > > > something is. > > > > > > > > > > I think you're specifically interested in I/O port space usage, and it > > > > > seems that you want all PCI drivers that*only* use I/O port space to > > > > > depend on LEGACY_PCI? Drivers that can use either I/O or memory > > > > > space or both would not depend on LEGACY_PCI? This seems a little > > > > > murky and error-prone. > > > > I'd like to hear Arnd's opinion on this but you're the PCI maintainer > > > > so of course your buy-in would be quite important for such an option. > > I'd like to hear Arnd's opinion, too. If we do add LEGACY_PCI, I > > think we need a clear guide for when to use it, e.g., "a PCI driver > > that uses inb() must depend on LEGACY_PCI" or whatever it is. > > > > I must be missing something because I don't see what we gain from > > this. We have PCI drivers, e.g., megaraid [1], for devices that have > > either MEM or I/O BARs. I think we want to build drivers like that on > > any arch that supports PCI. > > > > If the arch doesn't support I/O port space, devices that only have I/O > > BARs won't work, of course, and hopefully the PCI core and driver can > > figure that out and gracefully fail the probe. > > > > But that same driver should still work with devices that have MEM > > BARs. If inb() isn't always present, I guess we could litter these > > drivers with #ifdefs, but that would be pretty ugly. I think this is the big question here. If we do go with a compile-time solution as requested by Linus we will either get a lot of #ifdeffery, coarse driver dependencies or as proposed by Alan Stern for the USB #ifdefs might end up turning inb() into a compile-time nop. The originally proposed change that returned ~0 from inb() and printed a warning clearly is the simpler change and sure we could also drop the warning. I'm honestly torn, I do agree with Linus that we shouldn't have run-time things that we know at compile-time will not work but I also dislike all the #ifdeffery a compile-time solution requires. Sadly C really doesn't give us any better tools here. Also I 100% agree with you Bjorn how likely it is to see a device on a platform really shouldn't matter. Without going into details, on s390 we have already beneffited from PCI drivers working with 0 changes to support devices we previously didn't have on the platform or anticipated we would get in the future. Consequently drivers that could work in principle should be built. > > > > There were some ifdefs added to the 8250 drivers in Arnd's original > patch [0], but it does not seem included here. > > Niklas, what happened to the 8250 and the other driver changes? I missed it during the rebase, likely because the changed files compile depend on !S390 via config SERIAL_8250 and thus didn't cause any errors for my allyesconfig. That !S390 dependency is of course not really what we want if the driver can use MEM BARs.
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index a7da8ea7b3ed..32e0489bd01c 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -556,7 +556,7 @@ comment "PATA SFF controllers with BMDMA" config PATA_ALI tristate "ALi PATA support" - depends on PCI + depends on LEGACY_PCI select PATA_TIMINGS help This option enables support for the ALi ATA interfaces @@ -566,7 +566,7 @@ config PATA_ALI config PATA_AMD tristate "AMD/NVidia PATA support" - depends on PCI + depends on LEGACY_PCI select PATA_TIMINGS help This option enables support for the AMD and NVidia PATA @@ -584,7 +584,7 @@ config PATA_ARASAN_CF config PATA_ARTOP tristate "ARTOP 6210/6260 PATA support" - depends on PCI + depends on LEGACY_PCI help This option enables support for ARTOP PATA controllers. @@ -621,7 +621,7 @@ config PATA_BK3710 config PATA_CMD64X tristate "CMD64x PATA support" - depends on PCI + depends on LEGACY_PCI select PATA_TIMINGS help This option enables support for the CMD64x series chips @@ -667,7 +667,7 @@ config PATA_CS5536 config PATA_CYPRESS tristate "Cypress CY82C693 PATA support (Very Experimental)" - depends on PCI + depends on LEGACY_PCI select PATA_TIMINGS help This option enables support for the Cypress/Contaq CY82C693 @@ -707,7 +707,7 @@ config PATA_FTIDE010 config PATA_HPT366 tristate "HPT 366/368 PATA support" - depends on PCI + depends on LEGACY_PCI help This option enables support for the HPT 366 and 368 PATA controllers via the new ATA layer. @@ -716,7 +716,7 @@ config PATA_HPT366 config PATA_HPT37X tristate "HPT 370/370A/371/372/374/302 PATA support" - depends on PCI + depends on LEGACY_PCI help This option enables support for the majority of the later HPT PATA controllers via the new ATA layer. @@ -725,7 +725,7 @@ config PATA_HPT37X config PATA_HPT3X2N tristate "HPT 371N/372N/302N PATA support" - depends on PCI + depends on LEGACY_PCI help This option enables support for the N variant HPT PATA controllers via the new ATA layer. @@ -828,7 +828,7 @@ config PATA_MPC52xx config PATA_NETCELL tristate "NETCELL Revolution RAID support" - depends on PCI + depends on LEGACY_PCI help This option enables support for the Netcell Revolution RAID PATA controller. @@ -864,7 +864,7 @@ config PATA_OLDPIIX config PATA_OPTIDMA tristate "OPTI FireStar PATA support (Very Experimental)" - depends on PCI + depends on LEGACY_PCI help This option enables DMA/PIO support for the later OPTi controllers found on some old motherboards and in some @@ -874,7 +874,7 @@ config PATA_OPTIDMA config PATA_PDC2027X tristate "Promise PATA 2027x support" - depends on PCI + depends on LEGACY_PCI help This option enables support for Promise PATA pdc20268 to pdc20277 host adapters. @@ -882,7 +882,7 @@ config PATA_PDC2027X config PATA_PDC_OLD tristate "Older Promise PATA controller support" - depends on PCI + depends on LEGACY_PCI help This option enables support for the Promise 20246, 20262, 20263, 20265 and 20267 adapters. @@ -910,7 +910,7 @@ config PATA_RDC config PATA_SC1200 tristate "SC1200 PATA support" - depends on PCI && (X86_32 || COMPILE_TEST) + depends on LEGACY_PCI && (X86_32 || COMPILE_TEST) help This option enables support for the NatSemi/AMD SC1200 SoC companion chip used with the Geode processor family. @@ -928,7 +928,7 @@ config PATA_SCH config PATA_SERVERWORKS tristate "SERVERWORKS OSB4/CSB5/CSB6/HT1000 PATA support" - depends on PCI + depends on LEGACY_PCI help This option enables support for the Serverworks OSB4/CSB5/CSB6 and HT1000 PATA controllers, via the new ATA layer. @@ -1005,7 +1005,7 @@ comment "PIO-only SFF controllers" config PATA_CMD640_PCI tristate "CMD640 PCI PATA support (Experimental)" - depends on PCI + depends on LEGACY_PCI select PATA_TIMINGS help This option enables support for the CMD640 PCI IDE @@ -1086,7 +1086,7 @@ config PATA_NS87410 config PATA_OPTI tristate "OPTI621/6215 PATA support (Very Experimental)" - depends on PCI + depends on LEGACY_PCI help This option enables full PIO support for the early Opti ATA controllers found on some old motherboards. @@ -1197,7 +1197,7 @@ config ATA_GENERIC config PATA_LEGACY tristate "Legacy ISA PATA support (Experimental)" - depends on (ISA || PCI) + depends on (ISA || LEGACY_PCI) select PATA_TIMINGS help This option enables support for ISA/VLB/PCI bus legacy PATA diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c index 20a32e4d501d..791942217e2c 100644 --- a/drivers/ata/ata_generic.c +++ b/drivers/ata/ata_generic.c @@ -197,7 +197,8 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id if (!(command & PCI_COMMAND_IO)) return -ENODEV; - if (dev->vendor == PCI_VENDOR_ID_AL) + if (IS_ENABLED(CONFIG_LEGACY_PCI) && + dev->vendor == PCI_VENDOR_ID_AL) ata_pci_bmdma_clear_simplex(dev); if (dev->vendor == PCI_VENDOR_ID_ATI) { diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index b71ea4a680b0..636848ab6839 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -3107,6 +3107,7 @@ EXPORT_SYMBOL_GPL(ata_bmdma_port_start32); #ifdef CONFIG_PCI +#ifdef CONFIG_LEGACY_PCI /** * ata_pci_bmdma_clear_simplex - attempt to kick device out of simplex * @pdev: PCI device @@ -3132,6 +3133,7 @@ int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev) return 0; } EXPORT_SYMBOL_GPL(ata_pci_bmdma_clear_simplex); +#endif static void ata_bmdma_nodma(struct ata_host *host, const char *reason) { diff --git a/drivers/comedi/Kconfig b/drivers/comedi/Kconfig index 3cb61fa2c5c3..1b642716c5d3 100644 --- a/drivers/comedi/Kconfig +++ b/drivers/comedi/Kconfig @@ -572,6 +572,7 @@ if COMEDI_PCI_DRIVERS config COMEDI_8255_PCI tristate "Generic PCI based 8255 digital i/o board support" + depends on LEGACY_PCI select COMEDI_8255 help Enable support for PCI based 8255 digital i/o boards. This driver @@ -589,6 +590,7 @@ config COMEDI_8255_PCI config COMEDI_ADDI_WATCHDOG tristate + depends on LEGACY_PCI help Provides support for the watchdog subdevice found on many ADDI-DATA boards. This module will be automatically selected when needed. The @@ -596,6 +598,7 @@ config COMEDI_ADDI_WATCHDOG config COMEDI_ADDI_APCI_1032 tristate "ADDI-DATA APCI_1032 support" + depends on LEGACY_PCI help Enable support for ADDI-DATA APCI_1032 cards @@ -604,6 +607,7 @@ config COMEDI_ADDI_APCI_1032 config COMEDI_ADDI_APCI_1500 tristate "ADDI-DATA APCI_1500 support" + depends on LEGACY_PCI help Enable support for ADDI-DATA APCI_1500 cards @@ -612,6 +616,7 @@ config COMEDI_ADDI_APCI_1500 config COMEDI_ADDI_APCI_1516 tristate "ADDI-DATA APCI-1016/1516/2016 support" + depends on LEGACY_PCI select COMEDI_ADDI_WATCHDOG help Enable support for ADDI-DATA APCI-1016, APCI-1516 and APCI-2016 boards. @@ -623,6 +628,7 @@ config COMEDI_ADDI_APCI_1516 config COMEDI_ADDI_APCI_1564 tristate "ADDI-DATA APCI_1564 support" + depends on LEGACY_PCI select COMEDI_ADDI_WATCHDOG help Enable support for ADDI-DATA APCI_1564 cards @@ -632,6 +638,7 @@ config COMEDI_ADDI_APCI_1564 config COMEDI_ADDI_APCI_16XX tristate "ADDI-DATA APCI_16xx support" + depends on LEGACY_PCI help Enable support for ADDI-DATA APCI_16xx cards @@ -640,6 +647,7 @@ config COMEDI_ADDI_APCI_16XX config COMEDI_ADDI_APCI_2032 tristate "ADDI-DATA APCI_2032 support" + depends on LEGACY_PCI select COMEDI_ADDI_WATCHDOG help Enable support for ADDI-DATA APCI_2032 cards @@ -649,6 +657,7 @@ config COMEDI_ADDI_APCI_2032 config COMEDI_ADDI_APCI_2200 tristate "ADDI-DATA APCI_2200 support" + depends on LEGACY_PCI select COMEDI_ADDI_WATCHDOG help Enable support for ADDI-DATA APCI_2200 cards @@ -658,6 +667,7 @@ config COMEDI_ADDI_APCI_2200 config COMEDI_ADDI_APCI_3120 tristate "ADDI-DATA APCI_3120/3001 support" + depends on LEGACY_PCI depends on HAS_DMA help Enable support for ADDI-DATA APCI_3120/3001 cards @@ -667,6 +677,7 @@ config COMEDI_ADDI_APCI_3120 config COMEDI_ADDI_APCI_3501 tristate "ADDI-DATA APCI_3501 support" + depends on LEGACY_PCI help Enable support for ADDI-DATA APCI_3501 cards @@ -675,6 +686,7 @@ config COMEDI_ADDI_APCI_3501 config COMEDI_ADDI_APCI_3XXX tristate "ADDI-DATA APCI_3xxx support" + depends on LEGACY_PCI help Enable support for ADDI-DATA APCI_3xxx cards @@ -683,6 +695,7 @@ config COMEDI_ADDI_APCI_3XXX config COMEDI_ADL_PCI6208 tristate "ADLink PCI-6208A support" + depends on LEGACY_PCI help Enable support for ADLink PCI-6208A cards @@ -691,6 +704,7 @@ config COMEDI_ADL_PCI6208 config COMEDI_ADL_PCI7X3X tristate "ADLink PCI-723X/743X isolated digital i/o board support" + depends on LEGACY_PCI help Enable support for ADlink PCI-723X/743X isolated digital i/o boards. Supported boards include the 32-channel PCI-7230 (16 in/16 out), @@ -702,6 +716,7 @@ config COMEDI_ADL_PCI7X3X config COMEDI_ADL_PCI8164 tristate "ADLink PCI-8164 4 Axes Motion Control board support" + depends on LEGACY_PCI help Enable support for ADlink PCI-8164 4 Axes Motion Control board @@ -710,6 +725,7 @@ config COMEDI_ADL_PCI8164 config COMEDI_ADL_PCI9111 tristate "ADLink PCI-9111HR support" + depends on LEGACY_PCI select COMEDI_8254 help Enable support for ADlink PCI9111 cards @@ -719,6 +735,7 @@ config COMEDI_ADL_PCI9111 config COMEDI_ADL_PCI9118 tristate "ADLink PCI-9118DG, PCI-9118HG, PCI-9118HR support" + depends on LEGACY_PCI depends on HAS_DMA select COMEDI_8254 help @@ -729,6 +746,7 @@ config COMEDI_ADL_PCI9118 config COMEDI_ADV_PCI1710 tristate "Advantech PCI-171x and PCI-1731 support" + depends on LEGACY_PCI select COMEDI_8254 help Enable support for Advantech PCI-1710, PCI-1710HG, PCI-1711, @@ -739,6 +757,7 @@ config COMEDI_ADV_PCI1710 config COMEDI_ADV_PCI1720 tristate "Advantech PCI-1720 support" + depends on LEGACY_PCI help Enable support for Advantech PCI-1720 Analog Output board. @@ -747,6 +766,7 @@ config COMEDI_ADV_PCI1720 config COMEDI_ADV_PCI1723 tristate "Advantech PCI-1723 support" + depends on LEGACY_PCI help Enable support for Advantech PCI-1723 cards @@ -755,6 +775,7 @@ config COMEDI_ADV_PCI1723 config COMEDI_ADV_PCI1724 tristate "Advantech PCI-1724U support" + depends on LEGACY_PCI help Enable support for Advantech PCI-1724U cards. These are 32-channel analog output cards with voltage and current loop output ranges and @@ -765,6 +786,7 @@ config COMEDI_ADV_PCI1724 config COMEDI_ADV_PCI1760 tristate "Advantech PCI-1760 support" + depends on LEGACY_PCI help Enable support for Advantech PCI-1760 board. @@ -773,6 +795,7 @@ config COMEDI_ADV_PCI1760 config COMEDI_ADV_PCI_DIO tristate "Advantech PCI DIO card support" + depends on LEGACY_PCI select COMEDI_8254 select COMEDI_8255 help @@ -786,6 +809,7 @@ config COMEDI_ADV_PCI_DIO config COMEDI_AMPLC_DIO200_PCI tristate "Amplicon PCI215/PCI272/PCIe215/PCIe236/PCIe296 DIO support" + depends on LEGACY_PCI select COMEDI_AMPLC_DIO200 help Enable support for Amplicon PCI215, PCI272, PCIe215, PCIe236 @@ -796,6 +820,7 @@ config COMEDI_AMPLC_DIO200_PCI config COMEDI_AMPLC_PC236_PCI tristate "Amplicon PCI236 DIO board support" + depends on LEGACY_PCI select COMEDI_AMPLC_PC236 help Enable support for Amplicon PCI236 DIO board. @@ -805,6 +830,7 @@ config COMEDI_AMPLC_PC236_PCI config COMEDI_AMPLC_PC263_PCI tristate "Amplicon PCI263 relay board support" + depends on LEGACY_PCI help Enable support for Amplicon PCI263 relay board. This is a PCI board with 16 reed relay output channels. @@ -814,6 +840,7 @@ config COMEDI_AMPLC_PC263_PCI config COMEDI_AMPLC_PCI224 tristate "Amplicon PCI224 and PCI234 support" + depends on LEGACY_PCI select COMEDI_8254 help Enable support for Amplicon PCI224 and PCI234 AO boards @@ -823,6 +850,7 @@ config COMEDI_AMPLC_PCI224 config COMEDI_AMPLC_PCI230 tristate "Amplicon PCI230 and PCI260 support" + depends on LEGACY_PCI select COMEDI_8254 select COMEDI_8255 help @@ -834,6 +862,7 @@ config COMEDI_AMPLC_PCI230 config COMEDI_CONTEC_PCI_DIO tristate "Contec PIO1616L digital I/O board support" + depends on LEGACY_PCI help Enable support for the Contec PIO1616L digital I/O board @@ -842,6 +871,7 @@ config COMEDI_CONTEC_PCI_DIO config COMEDI_DAS08_PCI tristate "DAS-08 PCI support" + depends on LEGACY_PCI select COMEDI_DAS08 help Enable support for PCI DAS-08 cards. @@ -861,6 +891,7 @@ config COMEDI_DT3000 config COMEDI_DYNA_PCI10XX tristate "Dynalog PCI DAQ series support" + depends on LEGACY_PCI help Enable support for Dynalog PCI DAQ series PCI-1050 @@ -894,6 +925,7 @@ config COMEDI_ICP_MULTI config COMEDI_DAQBOARD2000 tristate "IOtech DAQboard/2000 support" + depends on LEGACY_PCI select COMEDI_8255 help Enable support for the IOtech DAQboard/2000 @@ -911,6 +943,7 @@ config COMEDI_JR3_PCI config COMEDI_KE_COUNTER tristate "Kolter-Electronic PCI Counter 1 card support" + depends on LEGACY_PCI help Enable support for Kolter-Electronic PCI Counter 1 cards @@ -919,6 +952,7 @@ config COMEDI_KE_COUNTER config COMEDI_CB_PCIDAS64 tristate "MeasurementComputing PCI-DAS 64xx, 60xx, and 4020 support" + depends on LEGACY_PCI select COMEDI_8255 help Enable support for ComputerBoards/MeasurementComputing PCI-DAS 64xx, @@ -929,6 +963,7 @@ config COMEDI_CB_PCIDAS64 config COMEDI_CB_PCIDAS tristate "MeasurementComputing PCI-DAS support" + depends on LEGACY_PCI select COMEDI_8254 select COMEDI_8255 help @@ -942,6 +977,7 @@ config COMEDI_CB_PCIDAS config COMEDI_CB_PCIDDA tristate "MeasurementComputing PCI-DDA series support" + depends on LEGACY_PCI select COMEDI_8255 help Enable support for ComputerBoards/MeasurementComputing PCI-DDA @@ -953,6 +989,7 @@ config COMEDI_CB_PCIDDA config COMEDI_CB_PCIMDAS tristate "MeasurementComputing PCIM-DAS1602/16, PCIe-DAS1602/16 support" + depends on LEGACY_PCI select COMEDI_8254 select COMEDI_8255 help @@ -964,6 +1001,7 @@ config COMEDI_CB_PCIMDAS config COMEDI_CB_PCIMDDA tristate "MeasurementComputing PCIM-DDA06-16 support" + depends on LEGACY_PCI select COMEDI_8255 help Enable support for ComputerBoards/MeasurementComputing PCIM-DDA06-16 @@ -973,6 +1011,7 @@ config COMEDI_CB_PCIMDDA config COMEDI_ME4000 tristate "Meilhaus ME-4000 support" + depends on LEGACY_PCI select COMEDI_8254 help Enable support for Meilhaus PCI data acquisition cards @@ -1031,6 +1070,7 @@ config COMEDI_NI_670X config COMEDI_NI_LABPC_PCI tristate "NI Lab-PC PCI-1200 support" + depends on LEGACY_PCI select COMEDI_NI_LABPC help Enable support for National Instruments Lab-PC PCI-1200. @@ -1040,6 +1080,7 @@ config COMEDI_NI_LABPC_PCI config COMEDI_NI_PCIDIO tristate "NI PCI-DIO32HS, PCI-6533, PCI-6534 support" + depends on LEGACY_PCI depends on HAS_DMA select COMEDI_MITE select COMEDI_8255 @@ -1052,6 +1093,7 @@ config COMEDI_NI_PCIDIO config COMEDI_NI_PCIMIO tristate "NI PCI-MIO-E series and M series support" + depends on LEGACY_PCI depends on HAS_DMA select COMEDI_NI_TIOCMD select COMEDI_8255 diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 60d9374c72c0..d36afa5ac6fc 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -687,7 +687,7 @@ config GPIO_VR41XX config GPIO_VX855 tristate "VIA VX855/VX875 GPIO" - depends on (X86 || COMPILE_TEST) && PCI + depends on (X86 || COMPILE_TEST) && LEGACY_PCI select MFD_CORE select MFD_VX855 help diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 64bd3dfba2c4..09397562c396 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1654,7 +1654,7 @@ config SENSORS_S3C_RAW config SENSORS_SIS5595 tristate "Silicon Integrated Systems Corp. SiS5595" - depends on PCI + depends on LEGACY_PCI help If you say yes here you get support for the integrated sensors in SiS5595 South Bridges. @@ -1985,7 +1985,7 @@ config SENSORS_VIA_CPUTEMP config SENSORS_VIA686A tristate "VIA686A" - depends on PCI + depends on LEGACY_PCI help If you say yes here you get support for the integrated sensors in Via 686A/B South Bridges. @@ -2006,7 +2006,7 @@ config SENSORS_VT1211 config SENSORS_VT8231 tristate "VIA VT8231" - depends on PCI + depends on LEGACY_PCI select HWMON_VID help If you say yes here then you get support for the integrated sensors diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index dce392839017..a8d6274dc965 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -11,7 +11,7 @@ comment "PC SMBus host controller drivers" config I2C_ALI1535 tristate "ALI 1535" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the SMB Host controller on Acer Labs Inc. (ALI) M1535 South Bridges. The SMB @@ -23,7 +23,7 @@ config I2C_ALI1535 config I2C_ALI1563 tristate "ALI 1563" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the SMB Host controller on Acer Labs Inc. (ALI) M1563 South Bridges. The SMB @@ -35,7 +35,7 @@ config I2C_ALI1563 config I2C_ALI15X3 tristate "ALI 15x3" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the Acer Labs Inc. (ALI) M1514 and M1543 motherboard I2C interfaces. @@ -45,7 +45,7 @@ config I2C_ALI15X3 config I2C_AMD756 tristate "AMD 756/766/768/8111 and nVidia nForce" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the AMD 756/766/768 mainboard I2C interfaces. The driver also includes @@ -70,7 +70,7 @@ config I2C_AMD756_S4882 config I2C_AMD8111 tristate "AMD 8111" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the second (SMBus 2.0) AMD 8111 mainboard I2C interface. @@ -154,7 +154,7 @@ config I2C_I801 config I2C_ISCH tristate "Intel SCH SMBus 1.0" - depends on PCI + depends on LEGACY_PCI select LPC_SCH help Say Y here if you want to use SMBus controller on the Intel SCH @@ -221,7 +221,7 @@ config I2C_CHT_WC config I2C_NFORCE2 tristate "Nvidia nForce2, nForce3 and nForce4" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the Nvidia nForce2, nForce3 and nForce4 families of mainboard I2C interfaces. @@ -253,7 +253,7 @@ config I2C_NVIDIA_GPU config I2C_SIS5595 tristate "SiS 5595" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the SiS5595 SMBus (a subset of I2C) interface. @@ -263,7 +263,7 @@ config I2C_SIS5595 config I2C_SIS630 tristate "SiS 630/730/964" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the SiS630, SiS730 and SiS964 SMBus (a subset of I2C) interface. @@ -273,7 +273,7 @@ config I2C_SIS630 config I2C_SIS96X tristate "SiS 96x" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the SiS 96x SMBus (a subset of I2C) interfaces. Specifically, the following @@ -291,7 +291,7 @@ config I2C_SIS96X config I2C_VIA tristate "VIA VT82C586B" - depends on PCI + depends on LEGACY_PCI select I2C_ALGOBIT help If you say yes to this option, support will be included for the VIA @@ -302,7 +302,7 @@ config I2C_VIA config I2C_VIAPRO tristate "VIA VT82C596/82C686/82xx and CX700/VX8xx/VX900" - depends on PCI + depends on LEGACY_PCI help If you say yes to this option, support will be included for the VIA VT82C596 and later SMBus interface. Specifically, the following diff --git a/drivers/input/gameport/Kconfig b/drivers/input/gameport/Kconfig index 5a2c2fb3217d..082280f95333 100644 --- a/drivers/input/gameport/Kconfig +++ b/drivers/input/gameport/Kconfig @@ -43,7 +43,7 @@ config GAMEPORT_L4 config GAMEPORT_EMU10K1 tristate "SB Live and Audigy gameport support" - depends on PCI + depends on LEGACY_PCI help Say Y here if you have a SoundBlaster Live! or SoundBlaster Audigy card and want to use its gameport. @@ -53,7 +53,7 @@ config GAMEPORT_EMU10K1 config GAMEPORT_FM801 tristate "ForteMedia FM801 gameport support" - depends on PCI + depends on LEGACY_PCI help Say Y here if you have ForteMedia FM801 PCI audio controller (Abit AU10, Genius Sound Maker, HP Workstation zx2000, diff --git a/drivers/isdn/hardware/mISDN/Kconfig b/drivers/isdn/hardware/mISDN/Kconfig index 078eeadf707a..2c5e16483179 100644 --- a/drivers/isdn/hardware/mISDN/Kconfig +++ b/drivers/isdn/hardware/mISDN/Kconfig @@ -7,14 +7,14 @@ comment "mISDN hardware drivers" config MISDN_HFCPCI tristate "Support for HFC PCI cards" depends on MISDN - depends on PCI + depends on LEGACY_PCI help Enable support for cards with Cologne Chip AG's HFC PCI chip. config MISDN_HFCMULTI tristate "Support for HFC multiport cards (HFC-4S/8S/E1)" - depends on PCI || CPM1 + depends on LEGACY_PCI || CPM1 depends on MISDN help Enable support for cards with Cologne Chip AG's HFC multiport @@ -43,7 +43,7 @@ config MISDN_HFCUSB config MISDN_AVMFRITZ tristate "Support for AVM FRITZ!CARD PCI" depends on MISDN - depends on PCI + depends on LEGACY_PCI select MISDN_IPAC help Enable support for AVMs FRITZ!CARD PCI cards @@ -51,7 +51,7 @@ config MISDN_AVMFRITZ config MISDN_SPEEDFAX tristate "Support for Sedlbauer Speedfax+" depends on MISDN - depends on PCI + depends on LEGACY_PCI select MISDN_IPAC select MISDN_ISAR help @@ -60,7 +60,7 @@ config MISDN_SPEEDFAX config MISDN_INFINEON tristate "Support for cards with Infineon chipset" depends on MISDN - depends on PCI + depends on LEGACY_PCI select MISDN_IPAC help Enable support for cards with ISAC + HSCX, IPAC or IPAC-SX @@ -69,14 +69,14 @@ config MISDN_INFINEON config MISDN_W6692 tristate "Support for cards with Winbond 6692" depends on MISDN - depends on PCI + depends on LEGACY_PCI help Enable support for Winbond 6692 PCI chip based cards. config MISDN_NETJET tristate "Support for NETJet cards" depends on MISDN - depends on PCI + depends on LEGACY_PCI depends on TTY select MISDN_IPAC select MISDN_HDLC diff --git a/drivers/media/cec/platform/Kconfig b/drivers/media/cec/platform/Kconfig index b672d3142eb7..5e92ece5b104 100644 --- a/drivers/media/cec/platform/Kconfig +++ b/drivers/media/cec/platform/Kconfig @@ -100,7 +100,7 @@ config CEC_TEGRA config CEC_SECO tristate "SECO Boards HDMI CEC driver" depends on (X86 || IA64) || COMPILE_TEST - depends on PCI && DMI + depends on LEGACY_PCI && DMI select CEC_CORE select CEC_NOTIFIER help diff --git a/drivers/media/pci/dm1105/Kconfig b/drivers/media/pci/dm1105/Kconfig index e0e3af67c99c..9ecab93685d4 100644 --- a/drivers/media/pci/dm1105/Kconfig +++ b/drivers/media/pci/dm1105/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only config DVB_DM1105 tristate "SDMC DM1105 based PCI cards" - depends on DVB_CORE && PCI && I2C && I2C_ALGOBIT + depends on DVB_CORE && LEGACY_PCI && I2C && I2C_ALGOBIT select DVB_PLL if MEDIA_SUBDRV_AUTOSELECT select DVB_STV0299 if MEDIA_SUBDRV_AUTOSELECT select DVB_STV0288 if MEDIA_SUBDRV_AUTOSELECT diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig index d29e29645e04..32eb73993998 100644 --- a/drivers/media/radio/Kconfig +++ b/drivers/media/radio/Kconfig @@ -67,7 +67,7 @@ config USB_DSBR config RADIO_MAXIRADIO tristate "Guillemot MAXI Radio FM 2000 radio" - depends on VIDEO_V4L2 && PCI + depends on VIDEO_V4L2 && LEGACY_PCI select RADIO_TEA575X help Choose Y here if you have this radio card. This card may also be diff --git a/drivers/message/fusion/Kconfig b/drivers/message/fusion/Kconfig index a3d0288fd0e2..cec5995e1911 100644 --- a/drivers/message/fusion/Kconfig +++ b/drivers/message/fusion/Kconfig @@ -2,7 +2,7 @@ menuconfig FUSION bool "Fusion MPT device support" - depends on PCI + depends on LEGACY_PCI help Say Y here to get to see options for Fusion Message Passing Technology (MPT) drivers. @@ -14,7 +14,7 @@ if FUSION config FUSION_SPI tristate "Fusion MPT ScsiHost drivers for SPI" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI select SCSI_SPI_ATTRS help SCSI HOST support for a parallel SCSI host adapters. @@ -29,7 +29,7 @@ config FUSION_SPI config FUSION_FC tristate "Fusion MPT ScsiHost drivers for FC" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI depends on SCSI_FC_ATTRS help SCSI HOST support for a Fiber Channel host adapters. @@ -48,7 +48,7 @@ config FUSION_FC config FUSION_SAS tristate "Fusion MPT ScsiHost drivers for SAS" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI select SCSI_SAS_ATTRS help SCSI HOST support for a SAS host adapters. diff --git a/drivers/net/arcnet/Kconfig b/drivers/net/arcnet/Kconfig index a51b9dab6d3a..b8038287c4f2 100644 --- a/drivers/net/arcnet/Kconfig +++ b/drivers/net/arcnet/Kconfig @@ -4,7 +4,7 @@ # menuconfig ARCNET - depends on NETDEVICES && (ISA || PCI || PCMCIA) + depends on NETDEVICES && (ISA || LEGACY_PCI || PCMCIA) tristate "ARCnet support" help If you have a network card of this type, say Y and check out the diff --git a/drivers/net/ethernet/8390/Kconfig b/drivers/net/ethernet/8390/Kconfig index a4130e643342..0fa43943ea74 100644 --- a/drivers/net/ethernet/8390/Kconfig +++ b/drivers/net/ethernet/8390/Kconfig @@ -117,7 +117,7 @@ config NE2000 config NE2K_PCI tristate "PCI NE2000 and clones support (see help)" - depends on PCI + depends on LEGACY_PCI select CRC32 help This driver is for NE2000 compatible PCI cards. It will not work diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig index 899c8a2a34b6..0ac61a5f1a37 100644 --- a/drivers/net/ethernet/amd/Kconfig +++ b/drivers/net/ethernet/amd/Kconfig @@ -56,7 +56,7 @@ config LANCE config PCNET32 tristate "AMD PCnet32 PCI support" - depends on PCI + depends on LEGACY_PCI select CRC32 select MII help diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig index 0b274d8fa45b..45a3c42945fc 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -18,7 +18,7 @@ if NET_VENDOR_INTEL config E100 tristate "Intel(R) PRO/100+ support" - depends on PCI + depends on LEGACY_PCI select MII help This driver supports Intel(R) PRO/100 family of adapters. @@ -41,7 +41,7 @@ config E100 config E1000 tristate "Intel(R) PRO/1000 Gigabit Ethernet support" - depends on PCI + depends on LEGACY_PCI help This driver supports Intel(R) PRO/1000 gigabit ethernet family of adapters. For more information on how to identify your adapter, go diff --git a/drivers/net/ethernet/sis/Kconfig b/drivers/net/ethernet/sis/Kconfig index 775d76d9890e..bd1b1b81b0e8 100644 --- a/drivers/net/ethernet/sis/Kconfig +++ b/drivers/net/ethernet/sis/Kconfig @@ -6,7 +6,7 @@ config NET_VENDOR_SIS bool "Silicon Integrated Systems (SiS) devices" default y - depends on PCI + depends on LEGACY_PCI help If you have a network (Ethernet) card belonging to this class, say Y. @@ -19,7 +19,7 @@ if NET_VENDOR_SIS config SIS900 tristate "SiS 900/7016 PCI Fast Ethernet Adapter support" - depends on PCI + depends on LEGACY_PCI select CRC32 select MII help @@ -35,7 +35,7 @@ config SIS900 config SIS190 tristate "SiS190/SiS191 gigabit ethernet support" - depends on PCI + depends on LEGACY_PCI select CRC32 select MII help diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig index affcf92cd3aa..8b1d67b00e68 100644 --- a/drivers/net/ethernet/ti/Kconfig +++ b/drivers/net/ethernet/ti/Kconfig @@ -6,7 +6,7 @@ config NET_VENDOR_TI bool "Texas Instruments (TI) devices" default y - depends on PCI || EISA || AR7 || ARCH_DAVINCI || ARCH_OMAP2PLUS || ARCH_KEYSTONE || ARCH_K3 + depends on LEGACY_PCI || EISA || AR7 || ARCH_DAVINCI || ARCH_OMAP2PLUS || ARCH_KEYSTONE || ARCH_K3 help If you have a network (Ethernet) card belonging to this class, say Y. @@ -159,7 +159,7 @@ config TI_KEYSTONE_NETCP_ETHSS config TLAN tristate "TI ThunderLAN support" - depends on (PCI || EISA) + depends on (LEGACY_PCI || EISA) help If you have a PCI Ethernet network card based on the ThunderLAN chip which is supported by this driver, say Y here. diff --git a/drivers/net/ethernet/via/Kconfig b/drivers/net/ethernet/via/Kconfig index da287ef65be7..0ca7d8f7bfde 100644 --- a/drivers/net/ethernet/via/Kconfig +++ b/drivers/net/ethernet/via/Kconfig @@ -18,8 +18,8 @@ if NET_VENDOR_VIA config VIA_RHINE tristate "VIA Rhine support" - depends on PCI || (OF_IRQ && GENERIC_PCI_IOMAP) - depends on PCI || ARCH_VT8500 || COMPILE_TEST + depends on LEGACY_PCI || (OF_IRQ && GENERIC_PCI_IOMAP) + depends on LEGACY_PCI || ARCH_VT8500 || COMPILE_TEST depends on HAS_DMA select CRC32 select MII diff --git a/drivers/net/fddi/Kconfig b/drivers/net/fddi/Kconfig index 846bf41c2717..1753c08d6423 100644 --- a/drivers/net/fddi/Kconfig +++ b/drivers/net/fddi/Kconfig @@ -5,7 +5,7 @@ config FDDI tristate "FDDI driver support" - depends on PCI || EISA || TC + depends on LEGACY_PCI || EISA || TC help Fiber Distributed Data Interface is a high speed local area network design; essentially a replacement for high speed Ethernet. FDDI can @@ -29,7 +29,7 @@ config DEFZA config DEFXX tristate "Digital DEFTA/DEFEA/DEFPA adapter support" - depends on FDDI && (PCI || EISA || TC) + depends on FDDI && (LEGACY_PCI || EISA || TC) help This is support for the DIGITAL series of TURBOchannel (DEFTA), EISA (DEFEA) and PCI (DEFPA) controllers which can connect you diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig index 592a8389fc5a..631c4c1c56c8 100644 --- a/drivers/net/wan/Kconfig +++ b/drivers/net/wan/Kconfig @@ -250,7 +250,7 @@ config C101 config FARSYNC tristate "FarSync T-Series support" - depends on HDLC && PCI + depends on HDLC && LEGACY_PCI help Support for the FarSync T-Series X.21 (and V.35/V.24) cards by FarSite Communications Ltd. diff --git a/drivers/net/wireless/atmel/Kconfig b/drivers/net/wireless/atmel/Kconfig index ca45a1021cf4..9baa4a19dd38 100644 --- a/drivers/net/wireless/atmel/Kconfig +++ b/drivers/net/wireless/atmel/Kconfig @@ -14,7 +14,7 @@ if WLAN_VENDOR_ATMEL config ATMEL tristate "Atmel at76c50x chipset 802.11b support" - depends on CFG80211 && (PCI || PCMCIA) + depends on CFG80211 && (LEGACY_PCI || PCMCIA) select WIRELESS_EXT select WEXT_PRIV select FW_LOADER @@ -32,7 +32,7 @@ config ATMEL config PCI_ATMEL tristate "Atmel at76c506 PCI cards" - depends on ATMEL && PCI + depends on ATMEL && LEGACY_PCI help Enable support for PCI and mini-PCI cards containing the Atmel at76c506 chip. diff --git a/drivers/net/wireless/intersil/hostap/Kconfig b/drivers/net/wireless/intersil/hostap/Kconfig index c865d3156cea..9bcd1c8546ff 100644 --- a/drivers/net/wireless/intersil/hostap/Kconfig +++ b/drivers/net/wireless/intersil/hostap/Kconfig @@ -56,7 +56,7 @@ config HOSTAP_FIRMWARE_NVRAM config HOSTAP_PLX tristate "Host AP driver for Prism2/2.5/3 in PLX9052 PCI adaptors" - depends on PCI && HOSTAP + depends on LEGACY_PCI && HOSTAP help Host AP driver's version for Prism2/2.5/3 PC Cards in PLX9052 based PCI adaptors. @@ -70,7 +70,7 @@ config HOSTAP_PLX config HOSTAP_PCI tristate "Host AP driver for Prism2.5 PCI adaptors" - depends on PCI && HOSTAP + depends on LEGACY_PCI && HOSTAP help Host AP driver's version for Prism2.5 PCI adaptors. diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index 43e615aa12ff..e0c99ddc145c 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -23,6 +23,17 @@ menuconfig PCI if PCI +config LEGACY_PCI + bool "Enable support for legacy PCI devices" + depends on HAVE_PCI + help + This option enables support for legacy PCI devices. This includes + PCI devices attached directly or via a bridge on a PCI Express bus. + It also includes compatibility features on PCI Express devices which + make use of legacy I/O spaces. + + For maximum compatibility with old hardware say 'Y' + config PCI_DOMAINS bool depends on PCI diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 6e3a04107bb6..5436b2be2c73 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -333,7 +333,7 @@ config SGIWD93_SCSI config BLK_DEV_3W_XXXX_RAID tristate "3ware 5/6/7/8xxx ATA-RAID support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI help 3ware is the only hardware ATA-Raid product in Linux to date. This card is 2,4, or 8 channel master mode support only. @@ -380,7 +380,7 @@ config SCSI_3W_SAS config SCSI_ACARD tristate "ACARD SCSI support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI help This driver supports the ACARD SCSI host adapter. Support Chip <ATP870 ATP876 ATP880 ATP885> @@ -472,7 +472,7 @@ config SCSI_DPT_I2O config SCSI_ADVANSYS tristate "AdvanSys SCSI support" depends on SCSI - depends on ISA || EISA || PCI + depends on ISA || EISA || LEGACY_PCI depends on ISA_DMA_API || !ISA help This is a driver for all SCSI host adapters manufactured by @@ -643,7 +643,7 @@ config SCSI_SNIC_DEBUG_FS config SCSI_DMX3191D tristate "DMX3191D SCSI support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI select SCSI_SPI_ATTRS help This is support for Domex DMX3191D SCSI Host Adapters. @@ -657,7 +657,7 @@ config SCSI_FDOMAIN config SCSI_FDOMAIN_PCI tristate "Future Domain TMC-3260/AHA-2920A PCI SCSI support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI select SCSI_FDOMAIN help This is support for Future Domain's PCI SCSI host adapters (TMC-3260) @@ -710,7 +710,7 @@ config SCSI_GENERIC_NCR5380 config SCSI_IPS tristate "IBM ServeRAID support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI help This is support for the IBM ServeRAID hardware RAID controllers. See <http://www.developer.ibm.com/welcome/netfinity/serveraid.html> @@ -770,7 +770,7 @@ config SCSI_IBMVFC_TRACE config SCSI_INITIO tristate "Initio 9100U(W) support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI help This is support for the Initio 91XXU(W) SCSI host adapter. Please read the SCSI-HOWTO, available from @@ -781,7 +781,7 @@ config SCSI_INITIO config SCSI_INIA100 tristate "Initio INI-A100U2W support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI help This is support for the Initio INI-A100U2W SCSI host adapter. Please read the SCSI-HOWTO, available from @@ -1130,7 +1130,7 @@ config SCSI_QLOGIC_FAS config SCSI_QLOGIC_1280 tristate "Qlogic QLA 1240/1x80/1x160 SCSI support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI help Say Y if you have a QLogic ISP1240/1x80/1x160 SCSI host adapter. @@ -1187,7 +1187,7 @@ config SCSI_SIM710 config SCSI_DC395x tristate "Tekram DC395(U/UW/F) and DC315(U) SCSI support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI select SCSI_SPI_ATTRS help This driver supports PCI SCSI host adapters based on the ASIC diff --git a/drivers/scsi/aic7xxx/Kconfig.aic79xx b/drivers/scsi/aic7xxx/Kconfig.aic79xx index a47dbd500e9a..64332cc73ea0 100644 --- a/drivers/scsi/aic7xxx/Kconfig.aic79xx +++ b/drivers/scsi/aic7xxx/Kconfig.aic79xx @@ -5,7 +5,7 @@ # config SCSI_AIC79XX tristate "Adaptec AIC79xx U320 support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI select SCSI_SPI_ATTRS help This driver supports all of Adaptec's Ultra 320 PCI-X diff --git a/drivers/scsi/aic7xxx/Kconfig.aic7xxx b/drivers/scsi/aic7xxx/Kconfig.aic7xxx index 0cfd92ce750a..3fa5dc1d1186 100644 --- a/drivers/scsi/aic7xxx/Kconfig.aic7xxx +++ b/drivers/scsi/aic7xxx/Kconfig.aic7xxx @@ -5,7 +5,7 @@ # config SCSI_AIC7XXX tristate "Adaptec AIC7xxx Fast -> U160 support" - depends on (PCI || EISA) && SCSI + depends on (LEGACY_PCI || EISA) && SCSI select SCSI_SPI_ATTRS help This driver supports all of Adaptec's Fast through Ultra 160 PCI diff --git a/drivers/scsi/aic94xx/Kconfig b/drivers/scsi/aic94xx/Kconfig index 71931c371b1c..b0cbf65dbe5b 100644 --- a/drivers/scsi/aic94xx/Kconfig +++ b/drivers/scsi/aic94xx/Kconfig @@ -8,7 +8,7 @@ config SCSI_AIC94XX tristate "Adaptec AIC94xx SAS/SATA support" - depends on PCI + depends on LEGACY_PCI select SCSI_SAS_LIBSAS select FW_LOADER help diff --git a/drivers/scsi/megaraid/Kconfig.megaraid b/drivers/scsi/megaraid/Kconfig.megaraid index 2adc2afd9f91..4ec46aede490 100644 --- a/drivers/scsi/megaraid/Kconfig.megaraid +++ b/drivers/scsi/megaraid/Kconfig.megaraid @@ -67,7 +67,7 @@ config MEGARAID_MAILBOX config MEGARAID_LEGACY tristate "LSI Logic Legacy MegaRAID Driver" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI help This driver supports the LSI MegaRAID 418, 428, 438, 466, 762, 490 and 467 SCSI host adapters. This driver also support the all U320 diff --git a/drivers/scsi/mvsas/Kconfig b/drivers/scsi/mvsas/Kconfig index 79812b80743b..f41f3f4a9f34 100644 --- a/drivers/scsi/mvsas/Kconfig +++ b/drivers/scsi/mvsas/Kconfig @@ -9,7 +9,7 @@ config SCSI_MVSAS tristate "Marvell 88SE64XX/88SE94XX SAS/SATA support" - depends on PCI + depends on LEGACY_PCI select SCSI_SAS_LIBSAS select FW_LOADER help diff --git a/drivers/scsi/qla2xxx/Kconfig b/drivers/scsi/qla2xxx/Kconfig index 802c373fd6d9..93afb73858ce 100644 --- a/drivers/scsi/qla2xxx/Kconfig +++ b/drivers/scsi/qla2xxx/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only config SCSI_QLA_FC tristate "QLogic QLA2XXX Fibre Channel Support" - depends on PCI && SCSI + depends on LEGACY_PCI && SCSI depends on SCSI_FC_ATTRS depends on NVME_FC || !NVME_FC select FW_LOADER diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 596705d24400..cfbd45767095 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -204,6 +204,7 @@ config SPI_BITBANG config SPI_BUTTERFLY tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)" depends on PARPORT + depends on HAS_IOPORT select SPI_BITBANG help This uses a custom parallel port cable to connect to an AVR diff --git a/drivers/staging/sm750fb/Kconfig b/drivers/staging/sm750fb/Kconfig index 8c0d8a873d5b..d332f912b964 100644 --- a/drivers/staging/sm750fb/Kconfig +++ b/drivers/staging/sm750fb/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 config FB_SM750 tristate "Silicon Motion SM750 framebuffer support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_MODE_HELPERS select FB_CFB_FILLRECT select FB_CFB_COPYAREA diff --git a/drivers/staging/vt6655/Kconfig b/drivers/staging/vt6655/Kconfig index d1cd5de46dcf..dd236f54d3a2 100644 --- a/drivers/staging/vt6655/Kconfig +++ b/drivers/staging/vt6655/Kconfig @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 config VT6655 tristate "VIA Technologies VT6655 support" - depends on PCI && MAC80211 && m + depends on LEGACY_PCI && MAC80211 && m help This is a vendor-written driver for VIA VT6655. diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index cc30ff93e2e4..460326a529d6 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -203,7 +203,7 @@ config MOXA_INTELLIO config MOXA_SMARTIO tristate "Moxa SmartIO support v. 2.0" - depends on SERIAL_NONSTANDARD && PCI + depends on SERIAL_NONSTANDARD && LEGACY_PCI help Say Y here if you have a Moxa SmartIO multiport serial card and/or want to help develop a new version of this driver. diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index fc543ac97c13..607791b7f693 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -908,7 +908,7 @@ config SERIAL_VR41XX_CONSOLE config SERIAL_JSM tristate "Digi International NEO and Classic PCI Support" - depends on PCI + depends on LEGACY_PCI select SERIAL_CORE help This is a driver for Digi International's Neo and Classic series diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index 6ed5e608dd04..a3446d44c118 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -343,7 +343,7 @@ config FB_IMX config FB_CYBER2000 tristate "CyberPro 2000/2010/5000 support" - depends on FB && PCI && (BROKEN || !SPARC64) + depends on FB && LEGACY_PCI && (BROKEN || !SPARC64) select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -1264,7 +1264,7 @@ config FB_ATY128_BACKLIGHT Say Y here if you want to control the backlight of your display. config FB_ATY - tristate "ATI Mach64 display support" if PCI || ATARI + tristate "ATI Mach64 display support" if LEGACY_PCI || ATARI depends on FB && !SPARC32 select FB_CFB_FILLRECT select FB_CFB_COPYAREA @@ -1315,7 +1315,7 @@ config FB_ATY_BACKLIGHT config FB_S3 tristate "S3 Trio/Virge support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -1374,7 +1374,7 @@ config FB_SAVAGE_ACCEL config FB_SIS tristate "SiS/XGI display support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -1404,7 +1404,7 @@ config FB_SIS_315 config FB_VIA tristate "VIA UniChrome (Pro) and Chrome9 display support" - depends on FB && PCI && GPIOLIB && I2C && (X86 || COMPILE_TEST) + depends on FB && LEGACY_PCI && GPIOLIB && I2C && (X86 || COMPILE_TEST) select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -1442,7 +1442,7 @@ endif config FB_NEOMAGIC tristate "NeoMagic display support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_MODE_HELPERS select FB_CFB_FILLRECT select FB_CFB_COPYAREA @@ -1470,7 +1470,7 @@ config FB_KYRO config FB_3DFX tristate "3Dfx Banshee/Voodoo3/Voodoo5 display support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_CFB_IMAGEBLIT select FB_CFB_FILLRECT select FB_CFB_COPYAREA @@ -1518,7 +1518,7 @@ config FB_VOODOO1 config FB_VT8623 tristate "VIA VT8623 support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -1532,7 +1532,7 @@ config FB_VT8623 config FB_TRIDENT tristate "Trident/CyberXXX/CyberBlade support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -1554,7 +1554,7 @@ config FB_TRIDENT config FB_ARK tristate "ARK 2000PV support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -2226,7 +2226,7 @@ config FB_SSD1307 config FB_SM712 tristate "Silicon Motion SM712 framebuffer support" - depends on FB && PCI + depends on FB && LEGACY_PCI select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 9d222ba17ec6..05258109bcc2 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -2053,7 +2053,7 @@ comment "PCI-based Watchdog Cards" config PCIPCWATCHDOG tristate "Berkshire Products PCI-PC Watchdog" - depends on PCI + depends on LEGACY_PCI help This is the driver for the Berkshire Products PCI-PC Watchdog card. This card simply watches your kernel to make sure it doesn't freeze, @@ -2068,7 +2068,7 @@ config PCIPCWATCHDOG config WDTPCI tristate "PCI-WDT500/501 Watchdog timer" - depends on PCI + depends on LEGACY_PCI help If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N. diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig index 41ce12597177..07d9587eede4 100644 --- a/sound/pci/Kconfig +++ b/sound/pci/Kconfig @@ -23,10 +23,10 @@ config SND_AD1889 config SND_ALS300 tristate "Avance Logic ALS300/ALS300+" + depends on LEGACY_PCI && ZONE_DMA select SND_PCM select SND_AC97_CODEC select SND_OPL3_LIB - depends on ZONE_DMA help Say 'Y' or 'M' to include support for Avance Logic ALS300/ALS300+ @@ -35,6 +35,7 @@ config SND_ALS300 config SND_ALS4000 tristate "Avance Logic ALS4000" + depends on LEGACY_PCI depends on ISA_DMA_API select SND_OPL3_LIB select SND_MPU401_UART @@ -49,6 +50,7 @@ config SND_ALS4000 config SND_ALI5451 tristate "ALi M5451 PCI Audio Controller" + depends on LEGACY_PCI select SND_MPU401_UART select SND_AC97_CODEC depends on ZONE_DMA @@ -96,6 +98,7 @@ config SND_ATIIXP_MODEM config SND_AU8810 tristate "Aureal Advantage" + depends on LEGACY_PCI select SND_MPU401_UART select SND_AC97_CODEC help @@ -110,6 +113,7 @@ config SND_AU8810 config SND_AU8820 tristate "Aureal Vortex" + depends on LEGACY_PCI select SND_MPU401_UART select SND_AC97_CODEC help @@ -123,6 +127,7 @@ config SND_AU8820 config SND_AU8830 tristate "Aureal Vortex 2" + depends on LEGACY_PCI select SND_MPU401_UART select SND_AC97_CODEC help @@ -151,13 +156,13 @@ config SND_AW2 config SND_AZT3328 tristate "Aztech AZF3328 / PCI168" + depends on LEGACY_PCI && ZONE_DMA select SND_OPL3_LIB select SND_MPU401_UART select SND_PCM select SND_RAWMIDI select SND_AC97_CODEC select SND_TIMER - depends on ZONE_DMA help Say Y here to include support for Aztech AZF3328 (PCI168) soundcards. @@ -172,6 +177,7 @@ config SND_AZT3328 config SND_BT87X tristate "Bt87x Audio Capture" + depends on LEGACY_PCI select SND_PCM help If you want to record audio from TV cards based on @@ -193,6 +199,7 @@ config SND_BT87X_OVERCLOCK config SND_CA0106 tristate "SB Audigy LS / Live 24bit" + depends on LEGACY_PCI select SND_AC97_CODEC select SND_RAWMIDI select SND_VMASTER @@ -205,6 +212,7 @@ config SND_CA0106 config SND_CMIPCI tristate "C-Media 8338, 8738, 8768, 8770" + depends on LEGACY_PCI select SND_OPL3_LIB select SND_MPU401_UART select SND_PCM @@ -221,6 +229,7 @@ config SND_OXYGEN_LIB config SND_OXYGEN tristate "C-Media 8786, 8787, 8788 (Oxygen)" + depends on LEGACY_PCI select SND_OXYGEN_LIB select SND_PCM select SND_MPU401_UART @@ -246,6 +255,7 @@ config SND_OXYGEN config SND_CS4281 tristate "Cirrus Logic (Sound Fusion) CS4281" + depends on LEGACY_PCI select SND_OPL3_LIB select SND_RAWMIDI select SND_AC97_CODEC @@ -257,6 +267,7 @@ config SND_CS4281 config SND_CS46XX tristate "Cirrus Logic (Sound Fusion) CS4280/CS461x/CS462x/CS463x" + depends on LEGACY_PCI select SND_RAWMIDI select SND_AC97_CODEC select FW_LOADER @@ -290,6 +301,7 @@ config SND_CS5530 config SND_CS5535AUDIO tristate "CS5535/CS5536 Audio" depends on X86_32 || MIPS || COMPILE_TEST + depends on LEGACY_PCI select SND_PCM select SND_AC97_CODEC help @@ -307,6 +319,7 @@ config SND_CS5535AUDIO config SND_CTXFI tristate "Creative Sound Blaster X-Fi" + depends on LEGACY_PCI select SND_PCM help If you want to use soundcards based on Creative Sound Blastr X-Fi @@ -462,13 +475,13 @@ config SND_INDIGODJX config SND_EMU10K1 tristate "Emu10k1 (SB Live!, Audigy, E-mu APS)" + depends on LEGACY_PCI && ZONE_DMA select FW_LOADER select SND_HWDEP select SND_RAWMIDI select SND_AC97_CODEC select SND_TIMER select SND_SEQ_DEVICE if SND_SEQUENCER != n - depends on ZONE_DMA help Say Y to include support for Sound Blaster PCI 512, Live!, Audigy and E-mu APS (partially supported) soundcards. @@ -489,6 +502,7 @@ config SND_EMU10K1_SEQ config SND_EMU10K1X tristate "Emu10k1X (Dell OEM Version)" + depends on LEGACY_PCI select SND_AC97_CODEC select SND_RAWMIDI depends on ZONE_DMA @@ -501,6 +515,7 @@ config SND_EMU10K1X config SND_ENS1370 tristate "(Creative) Ensoniq AudioPCI 1370" + depends on LEGACY_PCI select SND_RAWMIDI select SND_PCM help @@ -511,6 +526,7 @@ config SND_ENS1370 config SND_ENS1371 tristate "(Creative) Ensoniq AudioPCI 1371/1373" + depends on LEGACY_PCI select SND_RAWMIDI select SND_AC97_CODEC help @@ -522,10 +538,10 @@ config SND_ENS1371 config SND_ES1938 tristate "ESS ES1938/1946/1969 (Solo-1)" + depends on LEGACY_PCI && ZONE_DMA select SND_OPL3_LIB select SND_MPU401_UART select SND_AC97_CODEC - depends on ZONE_DMA help Say Y here to include support for soundcards based on ESS Solo-1 (ES1938, ES1946, ES1969) chips. @@ -535,9 +551,9 @@ config SND_ES1938 config SND_ES1968 tristate "ESS ES1968/1978 (Maestro-1/2/2E)" + depends on LEGACY_PCI && ZONE_DMA select SND_MPU401_UART select SND_AC97_CODEC - depends on ZONE_DMA help Say Y here to include support for soundcards based on ESS Maestro 1/2/2E chips. @@ -569,6 +585,7 @@ config SND_ES1968_RADIO config SND_FM801 tristate "ForteMedia FM801" + depends on LEGACY_PCI select SND_OPL3_LIB select SND_MPU401_UART select SND_AC97_CODEC @@ -621,10 +638,10 @@ config SND_HDSPM config SND_ICE1712 tristate "ICEnsemble ICE1712 (Envy24)" + depends on LEGACY_PCI && ZONE_DMA select SND_MPU401_UART select SND_AC97_CODEC select BITREVERSE - depends on ZONE_DMA help Say Y here to include support for soundcards based on the ICE1712 (Envy24) chip. @@ -640,6 +657,7 @@ config SND_ICE1712 config SND_ICE1724 tristate "ICE/VT1724/1720 (Envy24HT/PT)" + depends on LEGACY_PCI && ZONE_DMA select SND_RAWMIDI select SND_AC97_CODEC select SND_VMASTER @@ -712,6 +730,7 @@ config SND_LX6464ES config SND_MAESTRO3 tristate "ESS Allegro/Maestro3" select SND_AC97_CODEC + depends on LEGACY_PCI depends on ZONE_DMA help Say Y here to include support for soundcards based on ESS Maestro 3 @@ -753,6 +772,7 @@ config SND_NM256 config SND_PCXHR tristate "Digigram PCXHR" + depends on LEGACY_PCI select FW_LOADER select SND_PCM select SND_HWDEP @@ -764,6 +784,7 @@ config SND_PCXHR config SND_RIPTIDE tristate "Conexant Riptide" + depends on LEGACY_PCI select FW_LOADER select SND_OPL3_LIB select SND_MPU401_UART @@ -808,6 +829,7 @@ config SND_RME9652 config SND_SE6X tristate "Studio Evolution SE6X" depends on SND_OXYGEN=n && SND_VIRTUOSO=n # PCI ID conflict + depends on LEGACY_PCI select SND_OXYGEN_LIB select SND_PCM select SND_MPU401_UART @@ -827,10 +849,10 @@ config SND_SIS7019 config SND_SONICVIBES tristate "S3 SonicVibes" + depends on LEGACY_PCI && ZONE_DMA select SND_OPL3_LIB select SND_MPU401_UART select SND_AC97_CODEC - depends on ZONE_DMA help Say Y here to include support for soundcards based on the S3 SonicVibes chip. @@ -840,9 +862,9 @@ config SND_SONICVIBES config SND_TRIDENT tristate "Trident 4D-Wave DX/NX; SiS 7018" + depends on LEGACY_PCI && ZONE_DMA select SND_MPU401_UART select SND_AC97_CODEC - depends on ZONE_DMA help Say Y here to include support for soundcards based on Trident 4D-Wave DX/NX or SiS 7018 chips. @@ -852,6 +874,7 @@ config SND_TRIDENT config SND_VIA82XX tristate "VIA 82C686A/B, 8233/8235 AC97 Controller" + depends on LEGACY_PCI select SND_MPU401_UART select SND_AC97_CODEC help @@ -863,6 +886,7 @@ config SND_VIA82XX config SND_VIA82XX_MODEM tristate "VIA 82C686A/B, 8233 based Modems" + depends on LEGACY_PCI select SND_AC97_CODEC help Say Y here to include support for the integrated MC97 modem on @@ -873,6 +897,7 @@ config SND_VIA82XX_MODEM config SND_VIRTUOSO tristate "Asus Virtuoso 66/100/200 (Xonar)" + depends on LEGACY_PCI select SND_OXYGEN_LIB select SND_PCM select SND_MPU401_UART @@ -889,6 +914,7 @@ config SND_VIRTUOSO config SND_VX222 tristate "Digigram VX222" + depends on LEGACY_PCI select SND_VX_LIB help Say Y here to include support for Digigram VX222 soundcards. @@ -898,6 +924,7 @@ config SND_VX222 config SND_YMFPCI tristate "Yamaha YMF724/740/744/754" + depends on LEGACY_PCI select SND_OPL3_LIB select SND_MPU401_UART select SND_AC97_CODEC