diff options
| author | Michael J. Ruhl <michael.j.ruhl@intel.com> | 2024-11-14 08:03:57 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-05 14:01:35 +0100 |
| commit | 73521f1855523764becd40546f925085eeac06ce (patch) | |
| tree | 5c364a0a67e5e0ce3753d90476e36c179ddc425f /drivers/platform/x86/intel/pmt/class.c | |
| parent | 1c00bb70f3ad03d13077472c6bfad7477ab36efb (diff) | |
platform/x86/intel/pmt: allow user offset for PMT callbacks
[ Upstream commit 0c32840763b1579c923b4216c18bb756ca4ba473 ]
Usage of the telem sysfs file allows for partial reads at an offset.
The current callback method returns the buffer starting from offset 0
only.
Include the requested offset in the callback and update the necessary
address calculations with the offset.
Note: offset addition is moved from the caller to the local usage. For
non-callback usage this is unchanged behavior.
Fixes: e92affc74cd8 ("platform/x86/intel/vsec: Add PMT read callbacks")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Link: https://lore.kernel.org/r/20241114130358.2467787-2-michael.j.ruhl@intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/platform/x86/intel/pmt/class.c')
| -rw-r--r-- | drivers/platform/x86/intel/pmt/class.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c index c04bb7f97a4d..c3ca2ac91b05 100644 --- a/drivers/platform/x86/intel/pmt/class.c +++ b/drivers/platform/x86/intel/pmt/class.c @@ -59,10 +59,12 @@ pmt_memcpy64_fromio(void *to, const u64 __iomem *from, size_t count) } int pmt_telem_read_mmio(struct pci_dev *pdev, struct pmt_callbacks *cb, u32 guid, void *buf, - void __iomem *addr, u32 count) + void __iomem *addr, loff_t off, u32 count) { if (cb && cb->read_telem) - return cb->read_telem(pdev, guid, buf, count); + return cb->read_telem(pdev, guid, buf, off, count); + + addr += off; if (guid == GUID_SPR_PUNIT) /* PUNIT on SPR only supports aligned 64-bit read */ @@ -96,7 +98,7 @@ intel_pmt_read(struct file *filp, struct kobject *kobj, count = entry->size - off; count = pmt_telem_read_mmio(entry->ep->pcidev, entry->cb, entry->header.guid, buf, - entry->base + off, count); + entry->base, off, count); return count; } |