diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2020-06-19 19:51:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-29 18:40:26 +0200 |
| commit | 3fbd1dfe2635190e50534e5e3c21901e639a9068 (patch) | |
| tree | 197b4e481be363f8afa6e2ebec90fa49793c0210 | |
| parent | 4d3c6c8eb9816a0a0cb80becd159cf81a9977ed7 (diff) | |
mei: me: add kdoc for mei_me_fw_type_nm()
Add kdoc for mei_me_fw_type_nm() function.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200619165121.2145330-4-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 5ca9c678d3a8..c51d3da8f333 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; |