On Thu, 12 Mar 2026, David E. Box wrote:
> Move DEVID/PWRMBASE extraction into pmc_ssram_get_devid_pwrmbase().
>
> This is a preparatory refactor to place functionality in a common helper
> for reuse by a subsequent patch, while keeping behavior unchanged in this
> step.
>
> Signed-off-by: David E. Box <[email protected]>
> ---
> .../platform/x86/intel/pmc/ssram_telemetry.c | 31 ++++++++++++-------
> 1 file changed, 19 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/platform/x86/intel/pmc/ssram_telemetry.c
> b/drivers/platform/x86/intel/pmc/ssram_telemetry.c
> index 9c3d7ba2fd52..75a80a74a069 100644
> --- a/drivers/platform/x86/intel/pmc/ssram_telemetry.c
> +++ b/drivers/platform/x86/intel/pmc/ssram_telemetry.c
> @@ -27,6 +27,23 @@ DEFINE_FREE(pmc_ssram_telemetry_iounmap, void __iomem *,
> if (_T) iounmap(_T))
> static struct pmc_ssram_telemetry pmc_ssram_telems[3];
> static bool device_probed;
>
> +static inline u64 get_base(void __iomem *addr, u32 offset)
> +{
> + return lo_hi_readq(addr + offset) & GENMASK_ULL(63, 3);
A pre-existing problem: Header for GENMASK_ULL() is missing from this
file.
I also would prefer having that field named with define but that too is a
pre-existing thing.
--
i.
> +}
> +
> +static void pmc_ssram_get_devid_pwrmbase(void __iomem *ssram, unsigned int
> pmc_idx)
> +{
> + u64 pwrm_base;
> + u16 devid;
> +
> + pwrm_base = get_base(ssram, SSRAM_PWRM_OFFSET);
> + devid = readw(ssram + SSRAM_DEVID_OFFSET);
> +
> + pmc_ssram_telems[pmc_idx].devid = devid;
> + pmc_ssram_telems[pmc_idx].base_addr = pwrm_base;
> +}
> +
> static int
> pmc_ssram_telemetry_add_pmt(struct pci_dev *pcidev, u64 ssram_base, void
> __iomem *ssram)
> {
> @@ -63,18 +80,12 @@ pmc_ssram_telemetry_add_pmt(struct pci_dev *pcidev, u64
> ssram_base, void __iomem
> return intel_vsec_register(&pcidev->dev, &info);
> }
>
> -static inline u64 get_base(void __iomem *addr, u32 offset)
> -{
> - return lo_hi_readq(addr + offset) & GENMASK_ULL(63, 3);
> -}
> -
> static int
> pmc_ssram_telemetry_get_pmc(struct pci_dev *pcidev, unsigned int pmc_idx,
> u32 offset)
> {
> void __iomem __free(pmc_ssram_telemetry_iounmap) *tmp_ssram = NULL;
> void __iomem __free(pmc_ssram_telemetry_iounmap) *ssram = NULL;
> - u64 ssram_base, pwrm_base;
> - u16 devid;
> + u64 ssram_base;
>
> ssram_base = pci_resource_start(pcidev, 0);
> tmp_ssram = ioremap(ssram_base, SSRAM_HDR_SIZE);
> @@ -99,11 +110,7 @@ pmc_ssram_telemetry_get_pmc(struct pci_dev *pcidev,
> unsigned int pmc_idx, u32 of
> ssram = no_free_ptr(tmp_ssram);
> }
>
> - pwrm_base = get_base(ssram, SSRAM_PWRM_OFFSET);
> - devid = readw(ssram + SSRAM_DEVID_OFFSET);
> -
> - pmc_ssram_telems[pmc_idx].devid = devid;
> - pmc_ssram_telems[pmc_idx].base_addr = pwrm_base;
> + pmc_ssram_get_devid_pwrmbase(ssram, pmc_idx);
>
> /* Find and register and PMC telemetry entries */
> return pmc_ssram_telemetry_add_pmt(pcidev, ssram_base, ssram);
>
