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mei: me: disable mei interface on Mehlow server platforms 

For SPS firmware versions 5.0 and newer the way detection has changed.
The detection is done now via PCI_CFG_HFS_3 register.
To prevent conflict the previous method will get sps_4 suffix
Disable both CNP_H and CNP_H_3 interfaces. CNP_H_3 requires
a separate configuration as it doesn't support DMA.

Cc: <stable@vger.kernel.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200619165121.2145330-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler 2020-06-19 19:51:15 +03:00 committed by Greg Kroah-Hartman
parent d35d3660e0
commit f76d77f50b
4 changed files with 73 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/misc/mei/hw-me-regs.h
View File

@ -107,6 +107,8 @@
# define PCI_CFG_HFS_1_D0I3_MSK 0x80000000
#define PCI_CFG_HFS_2 0x48
#define PCI_CFG_HFS_3 0x60
# define PCI_CFG_HFS_3_FW_SKU_MSK 0x00000070
# define PCI_CFG_HFS_3_FW_SKU_SPS 0x00000060
#define PCI_CFG_HFS_4 0x64
#define PCI_CFG_HFS_5 0x68
#define PCI_CFG_HFS_6 0x6C

60
drivers/misc/mei/hw-me.c
View File

@ -1366,7 +1366,7 @@ static bool mei_me_fw_type_nm(struct pci_dev *pdev)
#define MEI_CFG_FW_NM \
.quirk_probe = mei_me_fw_type_nm
static bool mei_me_fw_type_sps(struct pci_dev *pdev)
static bool mei_me_fw_type_sps_4(struct pci_dev *pdev)
{
u32 reg;
unsigned int devfn;
@ -1382,7 +1382,36 @@ static bool mei_me_fw_type_sps(struct pci_dev *pdev)
return (reg & 0xf0000) == 0xf0000;
}
#define MEI_CFG_FW_SPS \
#define MEI_CFG_FW_SPS_4 \
.quirk_probe = mei_me_fw_type_sps_4
/**
* mei_me_fw_sku_sps() - check for sps sku
*
* Read ME FW Status register to check for SPS Firmware.
* The SPS FW is only signaled in pci function 0
*
* @pdev: pci device
*
* Return: true in case of SPS firmware
*/
static bool mei_me_fw_type_sps(struct pci_dev *pdev)
{
u32 reg;
u32 fw_type;
unsigned int devfn;
devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
pci_bus_read_config_dword(pdev->bus, devfn, PCI_CFG_HFS_3, &reg);
trace_mei_pci_cfg_read(&pdev->dev, "PCI_CFG_HFS_3", PCI_CFG_HFS_3, reg);
fw_type = (reg & PCI_CFG_HFS_3_FW_SKU_MSK);
dev_dbg(&pdev->dev, "fw type is %d\n", fw_type);
return fw_type == PCI_CFG_HFS_3_FW_SKU_SPS;
}
#define MEI_CFG_FW_SPS \
.quirk_probe = mei_me_fw_type_sps
#define MEI_CFG_FW_VER_SUPP \
@ -1452,10 +1481,17 @@ static const struct mei_cfg mei_me_pch8_cfg = {
};
/* PCH8 Lynx Point with quirk for SPS Firmware exclusion */
static const struct mei_cfg mei_me_pch8_sps_cfg = {
static const struct mei_cfg mei_me_pch8_sps_4_cfg = {
MEI_CFG_PCH8_HFS,
MEI_CFG_FW_VER_SUPP,
MEI_CFG_FW_SPS,
MEI_CFG_FW_SPS_4,
};
/* LBG with quirk for SPS (4.0) Firmware exclusion */
static const struct mei_cfg mei_me_pch12_sps_4_cfg = {
MEI_CFG_PCH8_HFS,
MEI_CFG_FW_VER_SUPP,
MEI_CFG_FW_SPS_4,
};
/* Cannon Lake and newer devices */
@ -1465,8 +1501,18 @@ static const struct mei_cfg mei_me_pch12_cfg = {
MEI_CFG_DMA_128,
};
/* LBG with quirk for SPS Firmware exclusion */
/* Cannon Lake with quirk for SPS 5.0 and newer Firmware exclusion */
static const struct mei_cfg mei_me_pch12_sps_cfg = {
MEI_CFG_PCH8_HFS,
MEI_CFG_FW_VER_SUPP,
MEI_CFG_DMA_128,
MEI_CFG_FW_SPS,
};
/* Cannon Lake with quirk for SPS 5.0 and newer Firmware exclusion
* w/o DMA support
*/
static const struct mei_cfg mei_me_pch12_nodma_sps_cfg = {
MEI_CFG_PCH8_HFS,
MEI_CFG_FW_VER_SUPP,
MEI_CFG_FW_SPS,
@ -1492,9 +1538,11 @@ static const struct mei_cfg *const mei_cfg_list[] = {
[MEI_ME_PCH7_CFG] = &mei_me_pch7_cfg,
[MEI_ME_PCH_CPT_PBG_CFG] = &mei_me_pch_cpt_pbg_cfg,
[MEI_ME_PCH8_CFG] = &mei_me_pch8_cfg,
[MEI_ME_PCH8_SPS_CFG] = &mei_me_pch8_sps_cfg,
[MEI_ME_PCH8_SPS_4_CFG] = &mei_me_pch8_sps_4_cfg,
[MEI_ME_PCH12_CFG] = &mei_me_pch12_cfg,
[MEI_ME_PCH12_SPS_4_CFG] = &mei_me_pch12_sps_4_cfg,
[MEI_ME_PCH12_SPS_CFG] = &mei_me_pch12_sps_cfg,
[MEI_ME_PCH12_SPS_NODMA_CFG] = &mei_me_pch12_nodma_sps_cfg,
[MEI_ME_PCH15_CFG] = &mei_me_pch15_cfg,
};

13
drivers/misc/mei/hw-me.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
* Copyright (c) 2012-2020, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
@ -76,11 +76,14 @@ struct mei_me_hw {
* with quirk for Node Manager exclusion.
* @MEI_ME_PCH8_CFG: Platform Controller Hub Gen8 and newer
* client platforms.
* @MEI_ME_PCH8_SPS_CFG: Platform Controller Hub Gen8 and newer
* @MEI_ME_PCH8_SPS_4_CFG: Platform Controller Hub Gen8 and newer
* servers platforms with quirk for
* SPS firmware exclusion.
* @MEI_ME_PCH12_CFG: Platform Controller Hub Gen12 and newer
* @MEI_ME_PCH12_SPS_CFG: Platform Controller Hub Gen12 and newer
* @MEI_ME_PCH12_SPS_4_CFG:Platform Controller Hub Gen12 up to 4.0
* servers platforms with quirk for
* SPS firmware exclusion.
* @MEI_ME_PCH12_SPS_CFG: Platform Controller Hub Gen12 5.0 and newer
* servers platforms with quirk for
* SPS firmware exclusion.
* @MEI_ME_PCH15_CFG: Platform Controller Hub Gen15 and newer
@ -94,9 +97,11 @@ enum mei_cfg_idx {
MEI_ME_PCH7_CFG,
MEI_ME_PCH_CPT_PBG_CFG,
MEI_ME_PCH8_CFG,
MEI_ME_PCH8_SPS_CFG,
MEI_ME_PCH8_SPS_4_CFG,
MEI_ME_PCH12_CFG,
MEI_ME_PCH12_SPS_4_CFG,
MEI_ME_PCH12_SPS_CFG,
MEI_ME_PCH12_SPS_NODMA_CFG,
MEI_ME_PCH15_CFG,
MEI_ME_NUM_CFG,
};

16
drivers/misc/mei/pci-me.c
View File

@ -59,18 +59,18 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
{MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, MEI_ME_PCH7_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, MEI_ME_PCH7_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, MEI_ME_PCH7_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_4_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_4_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_4_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_SPS_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_4_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_4_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_SPS_4_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, MEI_ME_PCH8_CFG)},
@ -84,8 +84,8 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP, MEI_ME_PCH12_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP_3, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_3, MEI_ME_PCH8_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_SPS_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_3, MEI_ME_PCH12_SPS_NODMA_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP, MEI_ME_PCH12_CFG)},
{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP_3, MEI_ME_PCH8_CFG)},