| Message ID | 20220926181848.2917639-4-khilman@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | dma/ti: enable udma and psil to be built as modules | expand |
Hi Kevin, On 9/26/22 21:18, Kevin Hilman wrote: > map symbols need EXPORT_SYMBOL and files need MODULE_LICENSE. > > Signed-off-by: Kevin Hilman <khilman@baylibre.com> > --- > drivers/dma/ti/Kconfig | 3 ++- > drivers/dma/ti/k3-psil-am62.c | 4 ++++ > drivers/dma/ti/k3-psil-am64.c | 4 ++++ > drivers/dma/ti/k3-psil-am654.c | 4 ++++ > drivers/dma/ti/k3-psil-j7200.c | 4 ++++ > drivers/dma/ti/k3-psil-j721e.c | 4 ++++ > drivers/dma/ti/k3-psil-j721s2.c | 4 ++++ > drivers/dma/ti/k3-psil.c | 2 ++ > 8 files changed, 28 insertions(+), 1 deletion(-) > > diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig > index f196be3b222f..2adc2cca10e9 100644 > --- a/drivers/dma/ti/Kconfig > +++ b/drivers/dma/ti/Kconfig > @@ -56,7 +56,8 @@ config TI_K3_UDMA_GLUE_LAYER > If unsure, say N. > > config TI_K3_PSIL > - bool > + tristate > + default TI_K3_UDMA > > config TI_DMA_CROSSBAR > bool > diff --git a/drivers/dma/ti/k3-psil-am62.c b/drivers/dma/ti/k3-psil-am62.c > index 2b6fd6e37c61..7c4ca85f68b1 100644 > --- a/drivers/dma/ti/k3-psil-am62.c > +++ b/drivers/dma/ti/k3-psil-am62.c > @@ -4,6 +4,7 @@ > */ > > #include <linux/kernel.h> > +#include <linux/module.h> > > #include "k3-psil-priv.h" > > @@ -184,3 +185,6 @@ struct psil_ep_map am62_ep_map = { > .dst = am62_dst_ep_map, > .dst_count = ARRAY_SIZE(am62_dst_ep_map), > }; > +EXPORT_SYMBOL_GPL(am62_ep_map); Wouldn't it be better to build one module (k3-psil.ko) and link all the platform libs into that? They are unconditionally built in all cases anyways and makes the lsmod under control. And no need to export these maps at all is a plus. > + > +MODULE_LICENSE("GPL v2"); > diff --git a/drivers/dma/ti/k3-psil-am64.c b/drivers/dma/ti/k3-psil-am64.c > index 9fdeaa11a4fc..c579374feef9 100644 > --- a/drivers/dma/ti/k3-psil-am64.c > +++ b/drivers/dma/ti/k3-psil-am64.c > @@ -5,6 +5,7 @@ > */ > > #include <linux/kernel.h> > +#include <linux/module.h> > > #include "k3-psil-priv.h" > > @@ -156,3 +157,6 @@ struct psil_ep_map am64_ep_map = { > .dst = am64_dst_ep_map, > .dst_count = ARRAY_SIZE(am64_dst_ep_map), > }; > +EXPORT_SYMBOL_GPL(am64_ep_map); > + > +MODULE_LICENSE("GPL v2"); > diff --git a/drivers/dma/ti/k3-psil-am654.c b/drivers/dma/ti/k3-psil-am654.c > index a896a15908cf..10db638b1178 100644 > --- a/drivers/dma/ti/k3-psil-am654.c > +++ b/drivers/dma/ti/k3-psil-am654.c > @@ -5,6 +5,7 @@ > */ > > #include <linux/kernel.h> > +#include <linux/module.h> > > #include "k3-psil-priv.h" > > @@ -173,3 +174,6 @@ struct psil_ep_map am654_ep_map = { > .dst = am654_dst_ep_map, > .dst_count = ARRAY_SIZE(am654_dst_ep_map), > }; > +EXPORT_SYMBOL_GPL(am654_ep_map); > + > +MODULE_LICENSE("GPL v2"); > diff --git a/drivers/dma/ti/k3-psil-j7200.c b/drivers/dma/ti/k3-psil-j7200.c > index 5ea63ea74822..b7c638a5d140 100644 > --- a/drivers/dma/ti/k3-psil-j7200.c > +++ b/drivers/dma/ti/k3-psil-j7200.c > @@ -5,6 +5,7 @@ > */ > > #include <linux/kernel.h> > +#include <linux/module.h> > > #include "k3-psil-priv.h" > > @@ -173,3 +174,6 @@ struct psil_ep_map j7200_ep_map = { > .dst = j7200_dst_ep_map, > .dst_count = ARRAY_SIZE(j7200_dst_ep_map), > }; > +EXPORT_SYMBOL_GPL(j7200_ep_map); > + > +MODULE_LICENSE("GPL v2"); > diff --git a/drivers/dma/ti/k3-psil-j721e.c b/drivers/dma/ti/k3-psil-j721e.c > index 34e3fc565a37..759e4a156acd 100644 > --- a/drivers/dma/ti/k3-psil-j721e.c > +++ b/drivers/dma/ti/k3-psil-j721e.c > @@ -5,6 +5,7 @@ > */ > > #include <linux/kernel.h> > +#include <linux/module.h> > > #include "k3-psil-priv.h" > > @@ -296,3 +297,6 @@ struct psil_ep_map j721e_ep_map = { > .dst = j721e_dst_ep_map, > .dst_count = ARRAY_SIZE(j721e_dst_ep_map), > }; > +EXPORT_SYMBOL_GPL(j721e_ep_map); > + > +MODULE_LICENSE("GPL v2"); > diff --git a/drivers/dma/ti/k3-psil-j721s2.c b/drivers/dma/ti/k3-psil-j721s2.c > index a488c2250623..fd9e56851e59 100644 > --- a/drivers/dma/ti/k3-psil-j721s2.c > +++ b/drivers/dma/ti/k3-psil-j721s2.c > @@ -4,6 +4,7 @@ > */ > > #include <linux/kernel.h> > +#include <linux/module.h> > > #include "k3-psil-priv.h" > > @@ -173,3 +174,6 @@ struct psil_ep_map j721s2_ep_map = { > .dst = j721s2_dst_ep_map, > .dst_count = ARRAY_SIZE(j721s2_dst_ep_map), > }; > +EXPORT_SYMBOL_GPL(j721s2_ep_map); > + > +MODULE_LICENSE("GPL v2"); > diff --git a/drivers/dma/ti/k3-psil.c b/drivers/dma/ti/k3-psil.c > index 761a384093d2..8b6533a1eeeb 100644 > --- a/drivers/dma/ti/k3-psil.c > +++ b/drivers/dma/ti/k3-psil.c > @@ -5,6 +5,7 @@ > */ > > #include <linux/kernel.h> > +#include <linux/module.h> > #include <linux/device.h> > #include <linux/init.h> > #include <linux/mutex.h> > @@ -101,3 +102,4 @@ int psil_set_new_ep_config(struct device *dev, const char *name, > return 0; > } > EXPORT_SYMBOL_GPL(psil_set_new_ep_config); > +MODULE_LICENSE("GPL v2");
Péter Ujfalusi <peter.ujfalusi@gmail.com> writes: > Hi Kevin, > > On 9/26/22 21:18, Kevin Hilman wrote: >> map symbols need EXPORT_SYMBOL and files need MODULE_LICENSE. >> >> Signed-off-by: Kevin Hilman <khilman@baylibre.com> >> --- >> drivers/dma/ti/Kconfig | 3 ++- >> drivers/dma/ti/k3-psil-am62.c | 4 ++++ >> drivers/dma/ti/k3-psil-am64.c | 4 ++++ >> drivers/dma/ti/k3-psil-am654.c | 4 ++++ >> drivers/dma/ti/k3-psil-j7200.c | 4 ++++ >> drivers/dma/ti/k3-psil-j721e.c | 4 ++++ >> drivers/dma/ti/k3-psil-j721s2.c | 4 ++++ >> drivers/dma/ti/k3-psil.c | 2 ++ >> 8 files changed, 28 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig >> index f196be3b222f..2adc2cca10e9 100644 >> --- a/drivers/dma/ti/Kconfig >> +++ b/drivers/dma/ti/Kconfig >> @@ -56,7 +56,8 @@ config TI_K3_UDMA_GLUE_LAYER >> If unsure, say N. >> >> config TI_K3_PSIL >> - bool >> + tristate >> + default TI_K3_UDMA >> >> config TI_DMA_CROSSBAR >> bool >> diff --git a/drivers/dma/ti/k3-psil-am62.c b/drivers/dma/ti/k3-psil-am62.c >> index 2b6fd6e37c61..7c4ca85f68b1 100644 >> --- a/drivers/dma/ti/k3-psil-am62.c >> +++ b/drivers/dma/ti/k3-psil-am62.c >> @@ -4,6 +4,7 @@ >> */ >> >> #include <linux/kernel.h> >> +#include <linux/module.h> >> >> #include "k3-psil-priv.h" >> >> @@ -184,3 +185,6 @@ struct psil_ep_map am62_ep_map = { >> .dst = am62_dst_ep_map, >> .dst_count = ARRAY_SIZE(am62_dst_ep_map), >> }; >> +EXPORT_SYMBOL_GPL(am62_ep_map); > > Wouldn't it be better to build one module (k3-psil.ko) and link all the > platform libs into that? > They are unconditionally built in all cases anyways and makes the lsmod > under control. > And no need to export these maps at all is a plus. I guess that's one option, but seems to be to be the wrong direction for a modular kernel. To me, it seems like the next step would be to make it so only the SoC specific module is loaded instead of always loading them all. Kevin
On 26/09/2022 21:50, Kevin Hilman wrote: > Péter Ujfalusi <peter.ujfalusi@gmail.com> writes: > >> Hi Kevin, >> >> On 9/26/22 21:18, Kevin Hilman wrote: >>> map symbols need EXPORT_SYMBOL and files need MODULE_LICENSE. >>> >>> Signed-off-by: Kevin Hilman <khilman@baylibre.com> >>> --- >>> drivers/dma/ti/Kconfig | 3 ++- >>> drivers/dma/ti/k3-psil-am62.c | 4 ++++ >>> drivers/dma/ti/k3-psil-am64.c | 4 ++++ >>> drivers/dma/ti/k3-psil-am654.c | 4 ++++ >>> drivers/dma/ti/k3-psil-j7200.c | 4 ++++ >>> drivers/dma/ti/k3-psil-j721e.c | 4 ++++ >>> drivers/dma/ti/k3-psil-j721s2.c | 4 ++++ >>> drivers/dma/ti/k3-psil.c | 2 ++ >>> 8 files changed, 28 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig >>> index f196be3b222f..2adc2cca10e9 100644 >>> --- a/drivers/dma/ti/Kconfig >>> +++ b/drivers/dma/ti/Kconfig >>> @@ -56,7 +56,8 @@ config TI_K3_UDMA_GLUE_LAYER >>> If unsure, say N. >>> >>> config TI_K3_PSIL >>> - bool >>> + tristate >>> + default TI_K3_UDMA >>> >>> config TI_DMA_CROSSBAR >>> bool >>> diff --git a/drivers/dma/ti/k3-psil-am62.c b/drivers/dma/ti/k3-psil-am62.c >>> index 2b6fd6e37c61..7c4ca85f68b1 100644 >>> --- a/drivers/dma/ti/k3-psil-am62.c >>> +++ b/drivers/dma/ti/k3-psil-am62.c >>> @@ -4,6 +4,7 @@ >>> */ >>> >>> #include <linux/kernel.h> >>> +#include <linux/module.h> >>> >>> #include "k3-psil-priv.h" >>> >>> @@ -184,3 +185,6 @@ struct psil_ep_map am62_ep_map = { >>> .dst = am62_dst_ep_map, >>> .dst_count = ARRAY_SIZE(am62_dst_ep_map), >>> }; >>> +EXPORT_SYMBOL_GPL(am62_ep_map); >> >> Wouldn't it be better to build one module (k3-psil.ko) and link all the >> platform libs into that? >> They are unconditionally built in all cases anyways and makes the lsmod >> under control. >> And no need to export these maps at all is a plus. > > I guess that's one option, but seems to be to be the wrong direction for > a modular kernel. To me, it seems like the next step would be to make > it so only the SoC specific module is loaded instead of always loading > them all. The PSI-L map is a library atm and exporting all the maps outside of the PSI-L library is wrong. We shall have fixed API to look up (and update) a PSI-L endpoint configuration and only that API shall be allowed. I prefer to have a single .ko binary for the PSI-L library/database for now. Optionally the individual SoC maps could be marked as init data and we could make a copy of the one that is needed on the booted device. For SoC only loading this whole library way must be reworked to a platform or a bus driver (the bus description via DT was shot down during the initial UDMA submission, fyi). So you need to find a 'device' which would probe the PSI-L map and only load the map that is needed. Furthermore: having the individual maps as separate .ko objects does not make much sense as none of them can be removed runtime, the symbols are used in the 'core' library.
Hi Péter Péter Ujfalusi <peter.ujfalusi@gmail.com> writes: > On 26/09/2022 21:50, Kevin Hilman wrote: >> Péter Ujfalusi <peter.ujfalusi@gmail.com> writes: >> >>> Hi Kevin, >>> >>> On 9/26/22 21:18, Kevin Hilman wrote: >>>> map symbols need EXPORT_SYMBOL and files need MODULE_LICENSE. >>>> >>>> Signed-off-by: Kevin Hilman <khilman@baylibre.com> >>>> --- >>>> drivers/dma/ti/Kconfig | 3 ++- >>>> drivers/dma/ti/k3-psil-am62.c | 4 ++++ >>>> drivers/dma/ti/k3-psil-am64.c | 4 ++++ >>>> drivers/dma/ti/k3-psil-am654.c | 4 ++++ >>>> drivers/dma/ti/k3-psil-j7200.c | 4 ++++ >>>> drivers/dma/ti/k3-psil-j721e.c | 4 ++++ >>>> drivers/dma/ti/k3-psil-j721s2.c | 4 ++++ >>>> drivers/dma/ti/k3-psil.c | 2 ++ >>>> 8 files changed, 28 insertions(+), 1 deletion(-) >>>> >>>> diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig >>>> index f196be3b222f..2adc2cca10e9 100644 >>>> --- a/drivers/dma/ti/Kconfig >>>> +++ b/drivers/dma/ti/Kconfig >>>> @@ -56,7 +56,8 @@ config TI_K3_UDMA_GLUE_LAYER >>>> If unsure, say N. >>>> >>>> config TI_K3_PSIL >>>> - bool >>>> + tristate >>>> + default TI_K3_UDMA >>>> >>>> config TI_DMA_CROSSBAR >>>> bool >>>> diff --git a/drivers/dma/ti/k3-psil-am62.c b/drivers/dma/ti/k3-psil-am62.c >>>> index 2b6fd6e37c61..7c4ca85f68b1 100644 >>>> --- a/drivers/dma/ti/k3-psil-am62.c >>>> +++ b/drivers/dma/ti/k3-psil-am62.c >>>> @@ -4,6 +4,7 @@ >>>> */ >>>> >>>> #include <linux/kernel.h> >>>> +#include <linux/module.h> >>>> >>>> #include "k3-psil-priv.h" >>>> >>>> @@ -184,3 +185,6 @@ struct psil_ep_map am62_ep_map = { >>>> .dst = am62_dst_ep_map, >>>> .dst_count = ARRAY_SIZE(am62_dst_ep_map), >>>> }; >>>> +EXPORT_SYMBOL_GPL(am62_ep_map); >>> >>> Wouldn't it be better to build one module (k3-psil.ko) and link all the >>> platform libs into that? >>> They are unconditionally built in all cases anyways and makes the lsmod >>> under control. >>> And no need to export these maps at all is a plus. >> >> I guess that's one option, but seems to be to be the wrong direction for >> a modular kernel. To me, it seems like the next step would be to make >> it so only the SoC specific module is loaded instead of always loading >> them all. > > The PSI-L map is a library atm and exporting all the maps outside of the > PSI-L library is wrong. We shall have fixed API to look up (and update) > a PSI-L endpoint configuration and only that API shall be allowed. > > I prefer to have a single .ko binary for the PSI-L library/database for > now. Optionally the individual SoC maps could be marked as init data and > we could make a copy of the one that is needed on the booted device. > > For SoC only loading this whole library way must be reworked to a > platform or a bus driver (the bus description via DT was shot down > during the initial UDMA submission, fyi). So you need to find a 'device' > which would probe the PSI-L map and only load the map that is needed. > > Furthermore: having the individual maps as separate .ko objects does not > make much sense as none of them can be removed runtime, the symbols are > used in the 'core' library. OK, I understand. I'll send a v2 with everything built into a single .ko (but I'll leave the initdata stuff for an optional follow-up series, since I don't fully understand how/when all these maps are used.) Thanks for your detailed review & suggestions, Kevin
diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig index f196be3b222f..2adc2cca10e9 100644 --- a/drivers/dma/ti/Kconfig +++ b/drivers/dma/ti/Kconfig @@ -56,7 +56,8 @@ config TI_K3_UDMA_GLUE_LAYER If unsure, say N. config TI_K3_PSIL - bool + tristate + default TI_K3_UDMA config TI_DMA_CROSSBAR bool diff --git a/drivers/dma/ti/k3-psil-am62.c b/drivers/dma/ti/k3-psil-am62.c index 2b6fd6e37c61..7c4ca85f68b1 100644 --- a/drivers/dma/ti/k3-psil-am62.c +++ b/drivers/dma/ti/k3-psil-am62.c @@ -4,6 +4,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include "k3-psil-priv.h" @@ -184,3 +185,6 @@ struct psil_ep_map am62_ep_map = { .dst = am62_dst_ep_map, .dst_count = ARRAY_SIZE(am62_dst_ep_map), }; +EXPORT_SYMBOL_GPL(am62_ep_map); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/ti/k3-psil-am64.c b/drivers/dma/ti/k3-psil-am64.c index 9fdeaa11a4fc..c579374feef9 100644 --- a/drivers/dma/ti/k3-psil-am64.c +++ b/drivers/dma/ti/k3-psil-am64.c @@ -5,6 +5,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include "k3-psil-priv.h" @@ -156,3 +157,6 @@ struct psil_ep_map am64_ep_map = { .dst = am64_dst_ep_map, .dst_count = ARRAY_SIZE(am64_dst_ep_map), }; +EXPORT_SYMBOL_GPL(am64_ep_map); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/ti/k3-psil-am654.c b/drivers/dma/ti/k3-psil-am654.c index a896a15908cf..10db638b1178 100644 --- a/drivers/dma/ti/k3-psil-am654.c +++ b/drivers/dma/ti/k3-psil-am654.c @@ -5,6 +5,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include "k3-psil-priv.h" @@ -173,3 +174,6 @@ struct psil_ep_map am654_ep_map = { .dst = am654_dst_ep_map, .dst_count = ARRAY_SIZE(am654_dst_ep_map), }; +EXPORT_SYMBOL_GPL(am654_ep_map); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/ti/k3-psil-j7200.c b/drivers/dma/ti/k3-psil-j7200.c index 5ea63ea74822..b7c638a5d140 100644 --- a/drivers/dma/ti/k3-psil-j7200.c +++ b/drivers/dma/ti/k3-psil-j7200.c @@ -5,6 +5,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include "k3-psil-priv.h" @@ -173,3 +174,6 @@ struct psil_ep_map j7200_ep_map = { .dst = j7200_dst_ep_map, .dst_count = ARRAY_SIZE(j7200_dst_ep_map), }; +EXPORT_SYMBOL_GPL(j7200_ep_map); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/ti/k3-psil-j721e.c b/drivers/dma/ti/k3-psil-j721e.c index 34e3fc565a37..759e4a156acd 100644 --- a/drivers/dma/ti/k3-psil-j721e.c +++ b/drivers/dma/ti/k3-psil-j721e.c @@ -5,6 +5,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include "k3-psil-priv.h" @@ -296,3 +297,6 @@ struct psil_ep_map j721e_ep_map = { .dst = j721e_dst_ep_map, .dst_count = ARRAY_SIZE(j721e_dst_ep_map), }; +EXPORT_SYMBOL_GPL(j721e_ep_map); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/ti/k3-psil-j721s2.c b/drivers/dma/ti/k3-psil-j721s2.c index a488c2250623..fd9e56851e59 100644 --- a/drivers/dma/ti/k3-psil-j721s2.c +++ b/drivers/dma/ti/k3-psil-j721s2.c @@ -4,6 +4,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include "k3-psil-priv.h" @@ -173,3 +174,6 @@ struct psil_ep_map j721s2_ep_map = { .dst = j721s2_dst_ep_map, .dst_count = ARRAY_SIZE(j721s2_dst_ep_map), }; +EXPORT_SYMBOL_GPL(j721s2_ep_map); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/ti/k3-psil.c b/drivers/dma/ti/k3-psil.c index 761a384093d2..8b6533a1eeeb 100644 --- a/drivers/dma/ti/k3-psil.c +++ b/drivers/dma/ti/k3-psil.c @@ -5,6 +5,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include <linux/device.h> #include <linux/init.h> #include <linux/mutex.h> @@ -101,3 +102,4 @@ int psil_set_new_ep_config(struct device *dev, const char *name, return 0; } EXPORT_SYMBOL_GPL(psil_set_new_ep_config); +MODULE_LICENSE("GPL v2");
map symbols need EXPORT_SYMBOL and files need MODULE_LICENSE. Signed-off-by: Kevin Hilman <khilman@baylibre.com> --- drivers/dma/ti/Kconfig | 3 ++- drivers/dma/ti/k3-psil-am62.c | 4 ++++ drivers/dma/ti/k3-psil-am64.c | 4 ++++ drivers/dma/ti/k3-psil-am654.c | 4 ++++ drivers/dma/ti/k3-psil-j7200.c | 4 ++++ drivers/dma/ti/k3-psil-j721e.c | 4 ++++ drivers/dma/ti/k3-psil-j721s2.c | 4 ++++ drivers/dma/ti/k3-psil.c | 2 ++ 8 files changed, 28 insertions(+), 1 deletion(-)