On Thu, 2023-11-30 at 14:33 +0200, Ilpo Järvinen wrote:
> On Tue, 28 Nov 2023, Srinivas Pandruvada wrote:
>
> > TPMI information header added additional fields in version 2. Some
> > of the
> > reserved fields in version 1 are used to define new fields.
> > Parse new fields and export as part of platform data. These fields
> > include:
> > - PCI segment ID
> > - Partition ID of the package, useful when more than one Intel VSEC
> > PCI
> > device per package
> > - cdie_mask: Mask of all compute dies in this partition
> >
> > Signed-off-by: Srinivas Pandruvada
> > <srinivas.pandruvada@xxxxxxxxxxxxxxx>
> > ---
> > drivers/platform/x86/intel/tpmi.c | 11 ++++++++++-
> > include/linux/intel_tpmi.h | 6 ++++++
> > 2 files changed, 16 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/platform/x86/intel/tpmi.c
> > b/drivers/platform/x86/intel/tpmi.c
> > index 311abcac894a..c89aa4d14bea 100644
> > --- a/drivers/platform/x86/intel/tpmi.c
> > +++ b/drivers/platform/x86/intel/tpmi.c
> > @@ -128,6 +128,9 @@ struct intel_tpmi_info {
> > * @dev: PCI device number
> > * @bus: PCI bus number
> > * @pkg: CPU Package id
> > + * @segment: PCI segment id
> > + * @partition: Package Partition id
> > + * @cdie_mask: Bitmap of compute dies in the current partition
> > * @reserved: Reserved for future use
> > * @lock: When set to 1 the register is locked and becomes
> > read-only
> > * until next reset. Not for use by the OS driver.
> > @@ -139,7 +142,10 @@ struct tpmi_info_header {
> > u64 dev:5;
> > u64 bus:8;
> > u64 pkg:8;
> > - u64 reserved:39;
> > + u64 segment:8;
> > + u64 partition:2;
> > + u64 cdie_mask:16;
> > + u64 reserved:13;
> > u64 lock:1;
> > } __packed;
> > @@ -684,6 +690,9 @@ static int tpmi_process_info(struct
> > intel_tpmi_info *tpmi_info,
> > tpmi_info->plat_info.bus_number = header.bus;
> > tpmi_info->plat_info.device_number = header.dev;
> > tpmi_info->plat_info.function_number = header.fn;
> > + tpmi_info->plat_info.cdie_mask = header.cdie_mask;
> > + tpmi_info->plat_info.partition = header.partition;
> > + tpmi_info->plat_info.segment = header.segment;
> >
> > iounmap(info_mem);
> >
> > diff --git a/include/linux/intel_tpmi.h
> > b/include/linux/intel_tpmi.h
> > index ee07393445f9..939663bb095f 100644
> > --- a/include/linux/intel_tpmi.h
> > +++ b/include/linux/intel_tpmi.h
> > @@ -14,7 +14,10 @@
> >
> > /**
> > * struct intel_tpmi_plat_info - Platform information for a TPMI
> > device instance
> > + * @cdie_mask: Mask of all compute dies in the partition
> > * @package_id: CPU Package id
> > + * @partition: Package partition id when multiple VSEC PCI
> > devices per package
> > + * @segment: PCI segment ID
> > * @bus_number: PCI bus number
> > * @device_number: PCI device number
> > * @function_number: PCI function number
> > @@ -23,7 +26,10 @@
> > * struct is used to return data via tpmi_get_platform_data().
> > */
> > struct intel_tpmi_plat_info {
> > + u16 cdie_mask;
> > u8 package_id;
> > + u8 partition;
> > + u8 segment;
> > u8 bus_number;
> > u8 device_number;
> > u8 function_number;
>
> I've a number of questions about this patch...
>
> - There no version check anywhere, yet commit message talks about v2?
>
No need to check, as the other fields will be 0s in v1.
> - What will those fields have in v1?
They are 0s as they were reserved for future use.
>
> - Entirely unrelated to the rest of this serie? So no users for
> these?
> Why not send this along with the patches containing the actual
> users
> so it'd have been easier to find the answers from the patches?
>
This is the core changes, so submitted as changes done in specs.
But fine to bundle with next series. I limit number of changes per
kernel release in the order of importance in the current products.
Thanks,
Srinivas
