| Message ID | 20211029152901.297939-2-linux@weissschuh.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | MODULE_DEVICE_TABLE() support for the ISHTP bus | expand |
Hi, On 10/29/21 17:28, Thomas Weißschuh wrote: > This allows to selectively autoload drivers for ISH devices. > Currently all ISH drivers are loaded for all systems having any ISH > device. > > Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> > > --- > > Cc: linux-kbuild@vger.kernel.org > Cc: linux-input@vger.kernel.org > Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> > Cc: Jiri Kosina <jkosina@suse.cz> > Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> > Cc: Hans de Goede <hdegoede@redhat.com> > Cc: Masahiro Yamada <masahiroy@kernel.org> > Cc: Michal Marek <michal.lkml@markovi.net> > Cc: Nick Desaulniers <ndesaulniers@google.com> > --- > include/linux/mod_devicetable.h | 13 +++++++++++++ > scripts/mod/devicetable-offsets.c | 3 +++ > scripts/mod/file2alias.c | 24 ++++++++++++++++++++++++ > 3 files changed, 40 insertions(+) > > diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h > index ae2e75d15b21..befbf53c4b7c 100644 > --- a/include/linux/mod_devicetable.h > +++ b/include/linux/mod_devicetable.h > @@ -895,4 +895,17 @@ struct dfl_device_id { > kernel_ulong_t driver_data; > }; > > +/* ISHTP (Integrated Sensor Hub Transport Protocol) */ > + > +#define ISHTP_MODULE_PREFIX "ishtp:" > + > +/** > + * struct ishtp_device_id - ISHTP device identifier > + * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba > + * @context: pointer to driver specific data > + */ > +struct ishtp_device_id { > + guid_t guid; The kdoc comment documents a context pointer, but this is missing from the actual struct. Having some sort of driver_data (1) field here would be good IMHO. Regards, Hans 1) "context" is fine, but AFAIK almost all other foo_device_id structs call this driver_data, so that would be more consistent IMHO. > +}; > + > #endif /* LINUX_MOD_DEVICETABLE_H */ > diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c > index cc3625617a0e..c0d3bcb99138 100644 > --- a/scripts/mod/devicetable-offsets.c > +++ b/scripts/mod/devicetable-offsets.c > @@ -259,5 +259,8 @@ int main(void) > DEVID_FIELD(dfl_device_id, type); > DEVID_FIELD(dfl_device_id, feature_id); > > + DEVID(ishtp_device_id); > + DEVID_FIELD(ishtp_device_id, guid); > + > return 0; > } > diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c > index 49aba862073e..5258247d78ac 100644 > --- a/scripts/mod/file2alias.c > +++ b/scripts/mod/file2alias.c > @@ -115,6 +115,17 @@ static inline void add_uuid(char *str, uuid_le uuid) > uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]); > } > > +static inline void add_guid(char *str, guid_t guid) > +{ > + int len = strlen(str); > + > + sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X", > + guid.b[3], guid.b[2], guid.b[1], guid.b[0], > + guid.b[5], guid.b[4], guid.b[7], guid.b[6], > + guid.b[8], guid.b[9], guid.b[10], guid.b[11], > + guid.b[12], guid.b[13], guid.b[14], guid.b[15]); > +} > + > /** > * Check that sizeof(device_id type) are consistent with size of section > * in .o file. If in-consistent then userspace and kernel does not agree > @@ -1380,6 +1391,18 @@ static int do_mhi_entry(const char *filename, void *symval, char *alias) > return 1; > } > > +/* Looks like: ishtp:{guid} */ > +static int do_ishtp_entry(const char *filename, void *symval, char *alias) > +{ > + DEF_FIELD(symval, ishtp_device_id, guid); > + > + strcpy(alias, ISHTP_MODULE_PREFIX "{"); > + add_guid(alias, guid); > + strcat(alias, "}"); > + > + return 1; > +} > + > static int do_auxiliary_entry(const char *filename, void *symval, char *alias) > { > DEF_FIELD_ADDR(symval, auxiliary_device_id, name); > @@ -1499,6 +1522,7 @@ static const struct devtable devtable[] = { > {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry}, > {"ssam", SIZE_ssam_device_id, do_ssam_entry}, > {"dfl", SIZE_dfl_device_id, do_dfl_entry}, > + {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry}, > }; > > /* Create MODULE_ALIAS() statements. >
On 2021-11-01 10:58+0100, Hans de Goede wrote: > On 10/29/21 17:28, Thomas Weißschuh wrote: > > This allows to selectively autoload drivers for ISH devices. > > Currently all ISH drivers are loaded for all systems having any ISH > > device. > > > > Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> > > > > --- > > > > Cc: linux-kbuild@vger.kernel.org > > Cc: linux-input@vger.kernel.org > > Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> > > Cc: Jiri Kosina <jkosina@suse.cz> > > Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> > > Cc: Hans de Goede <hdegoede@redhat.com> > > Cc: Masahiro Yamada <masahiroy@kernel.org> > > Cc: Michal Marek <michal.lkml@markovi.net> > > Cc: Nick Desaulniers <ndesaulniers@google.com> > > --- > > include/linux/mod_devicetable.h | 13 +++++++++++++ > > scripts/mod/devicetable-offsets.c | 3 +++ > > scripts/mod/file2alias.c | 24 ++++++++++++++++++++++++ > > 3 files changed, 40 insertions(+) > > > > diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h > > index ae2e75d15b21..befbf53c4b7c 100644 > > --- a/include/linux/mod_devicetable.h > > +++ b/include/linux/mod_devicetable.h > > @@ -895,4 +895,17 @@ struct dfl_device_id { > > kernel_ulong_t driver_data; > > }; > > > > +/* ISHTP (Integrated Sensor Hub Transport Protocol) */ > > + > > +#define ISHTP_MODULE_PREFIX "ishtp:" > > + > > +/** > > + * struct ishtp_device_id - ISHTP device identifier > > + * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba > > + * @context: pointer to driver specific data > > + */ > > +struct ishtp_device_id { > > + guid_t guid; > > The kdoc comment documents a context pointer, but this is missing from the > actual struct. Having some sort of driver_data (1) field here would be good IMHO. Fine for me. I left it out because nothing would be using it at the moment and it would have been easy to add when needed. Do you want me to send a v2 for that or would you add it when merging? (Or remove the spurious comment) > Regards, > > Hans > > 1) "context" is fine, but AFAIK almost all other foo_device_id structs call this > driver_data, so that would be more consistent IMHO. Thomas
Hi, On 11/1/21 11:09, Thomas Weißschuh wrote: > On 2021-11-01 10:58+0100, Hans de Goede wrote: >> On 10/29/21 17:28, Thomas Weißschuh wrote: >>> This allows to selectively autoload drivers for ISH devices. >>> Currently all ISH drivers are loaded for all systems having any ISH >>> device. >>> >>> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> >>> >>> --- >>> >>> Cc: linux-kbuild@vger.kernel.org >>> Cc: linux-input@vger.kernel.org >>> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> >>> Cc: Jiri Kosina <jkosina@suse.cz> >>> Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> >>> Cc: Hans de Goede <hdegoede@redhat.com> >>> Cc: Masahiro Yamada <masahiroy@kernel.org> >>> Cc: Michal Marek <michal.lkml@markovi.net> >>> Cc: Nick Desaulniers <ndesaulniers@google.com> >>> --- >>> include/linux/mod_devicetable.h | 13 +++++++++++++ >>> scripts/mod/devicetable-offsets.c | 3 +++ >>> scripts/mod/file2alias.c | 24 ++++++++++++++++++++++++ >>> 3 files changed, 40 insertions(+) >>> >>> diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h >>> index ae2e75d15b21..befbf53c4b7c 100644 >>> --- a/include/linux/mod_devicetable.h >>> +++ b/include/linux/mod_devicetable.h >>> @@ -895,4 +895,17 @@ struct dfl_device_id { >>> kernel_ulong_t driver_data; >>> }; >>> >>> +/* ISHTP (Integrated Sensor Hub Transport Protocol) */ >>> + >>> +#define ISHTP_MODULE_PREFIX "ishtp:" >>> + >>> +/** >>> + * struct ishtp_device_id - ISHTP device identifier >>> + * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba >>> + * @context: pointer to driver specific data >>> + */ >>> +struct ishtp_device_id { >>> + guid_t guid; >> >> The kdoc comment documents a context pointer, but this is missing from the >> actual struct. Having some sort of driver_data (1) field here would be good IMHO. > > Fine for me. > > I left it out because nothing would be using it at the moment and > it would have been easy to add when needed. IMHO having a device_id without a context/driver_data field would be weird and is likely asking for needless churn in the future, but see below. > Do you want me to send a v2 for that or would you add it when merging? > (Or remove the spurious comment) As I indicated in my reply to the cover-letter, I believe this series should be merged through the HID tree, so this is up to the HID maintainers to decide. Regards, Hans p.s. Thank you for doing this series I did not realize that the eclite driver would end up being loaded on all systems where the ISH is used, thank you for fixing this.
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index ae2e75d15b21..befbf53c4b7c 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -895,4 +895,17 @@ struct dfl_device_id { kernel_ulong_t driver_data; }; +/* ISHTP (Integrated Sensor Hub Transport Protocol) */ + +#define ISHTP_MODULE_PREFIX "ishtp:" + +/** + * struct ishtp_device_id - ISHTP device identifier + * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba + * @context: pointer to driver specific data + */ +struct ishtp_device_id { + guid_t guid; +}; + #endif /* LINUX_MOD_DEVICETABLE_H */ diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c index cc3625617a0e..c0d3bcb99138 100644 --- a/scripts/mod/devicetable-offsets.c +++ b/scripts/mod/devicetable-offsets.c @@ -259,5 +259,8 @@ int main(void) DEVID_FIELD(dfl_device_id, type); DEVID_FIELD(dfl_device_id, feature_id); + DEVID(ishtp_device_id); + DEVID_FIELD(ishtp_device_id, guid); + return 0; } diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 49aba862073e..5258247d78ac 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -115,6 +115,17 @@ static inline void add_uuid(char *str, uuid_le uuid) uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]); } +static inline void add_guid(char *str, guid_t guid) +{ + int len = strlen(str); + + sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X", + guid.b[3], guid.b[2], guid.b[1], guid.b[0], + guid.b[5], guid.b[4], guid.b[7], guid.b[6], + guid.b[8], guid.b[9], guid.b[10], guid.b[11], + guid.b[12], guid.b[13], guid.b[14], guid.b[15]); +} + /** * Check that sizeof(device_id type) are consistent with size of section * in .o file. If in-consistent then userspace and kernel does not agree @@ -1380,6 +1391,18 @@ static int do_mhi_entry(const char *filename, void *symval, char *alias) return 1; } +/* Looks like: ishtp:{guid} */ +static int do_ishtp_entry(const char *filename, void *symval, char *alias) +{ + DEF_FIELD(symval, ishtp_device_id, guid); + + strcpy(alias, ISHTP_MODULE_PREFIX "{"); + add_guid(alias, guid); + strcat(alias, "}"); + + return 1; +} + static int do_auxiliary_entry(const char *filename, void *symval, char *alias) { DEF_FIELD_ADDR(symval, auxiliary_device_id, name); @@ -1499,6 +1522,7 @@ static const struct devtable devtable[] = { {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry}, {"ssam", SIZE_ssam_device_id, do_ssam_entry}, {"dfl", SIZE_dfl_device_id, do_dfl_entry}, + {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry}, }; /* Create MODULE_ALIAS() statements.
This allows to selectively autoload drivers for ISH devices. Currently all ISH drivers are loaded for all systems having any ISH device. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> --- Cc: linux-kbuild@vger.kernel.org Cc: linux-input@vger.kernel.org Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nick Desaulniers <ndesaulniers@google.com> --- include/linux/mod_devicetable.h | 13 +++++++++++++ scripts/mod/devicetable-offsets.c | 3 +++ scripts/mod/file2alias.c | 24 ++++++++++++++++++++++++ 3 files changed, 40 insertions(+)