Commit 3fbd1dfe authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
Browse files

mei: me: add kdoc for mei_me_fw_type_nm() 



Add kdoc for mei_me_fw_type_nm() function.

Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200619165121.2145330-4-tomas.winkler@intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4d3c6c8e

drivers/misc/mei/hw-me.c

+14 −1
Original line number Diff line number Diff line
@@ -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, &reg);

	devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);

	pci_bus_read_config_dword(pdev->bus, devfn, PCI_CFG_HFS_2, &reg);

	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;