Messages in this thread Patch in this message | | | From | Tomas Winkler <> | Subject | [char-misc-next 4/7] mei: me: add kdoc for mei_me_fw_type_nm() | Date | Fri, 19 Jun 2020 19:51:18 +0300 |
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Add kdoc for mei_me_fw_type_nm() function.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> --- drivers/misc/mei/hw-me.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 6aa522c0d910..e476995e4c56 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -1353,11 +1353,24 @@ static const struct mei_hw_ops mei_me_hw_ops = { .read = mei_me_read_slots }; +/** + * mei_me_fw_type_nm() - check for nm sku + * + * Read ME FW Status register to check for the Node Manager (NM) Firmware. + * The NM FW is only signaled in PCI function 0. + * __Note__: Deprecated by PCH8 and newer. + * + * @pdev: pci device + * + * Return: true in case of NM firmware + */ static bool mei_me_fw_type_nm(const struct pci_dev *pdev) { u32 reg; + unsigned int devfn; - pci_read_config_dword(pdev, PCI_CFG_HFS_2, ®); + devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); + pci_bus_read_config_dword(pdev->bus, devfn, PCI_CFG_HFS_2, ®); trace_mei_pci_cfg_read(&pdev->dev, "PCI_CFG_HFS_2", PCI_CFG_HFS_2, reg); /* make sure that bit 9 (NM) is up and bit 10 (DM) is down */ return (reg & 0x600) == 0x200; -- 2.25.4
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