| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ops.h> |
| #include <stdint.h> |
| |
| #include "me.h" |
| #include "pch.h" |
| |
| /* Send END OF POST message to the ME */ |
| static int me8_mkhi_end_of_post(void) |
| { |
| struct mkhi_header mkhi = { |
| .group_id = MKHI_GROUP_ID_GEN, |
| .command = MKHI_END_OF_POST, |
| }; |
| struct mei_header mei = { |
| .is_complete = 1, |
| .host_address = MEI_HOST_ADDRESS, |
| .client_address = MEI_ADDRESS_MKHI, |
| .length = sizeof(mkhi), |
| }; |
| |
| u32 eop_ack; |
| |
| /* Send request and wait for response */ |
| printk(BIOS_NOTICE, "ME: %s\n", __func__); |
| if (mei_sendrecv(&mei, &mkhi, NULL, &eop_ack, sizeof(eop_ack)) < 0) { |
| printk(BIOS_ERR, "ME: END OF POST message failed\n"); |
| return -1; |
| } |
| |
| printk(BIOS_INFO, "ME: END OF POST message successful (%d)\n", eop_ack); |
| return 0; |
| } |
| |
| /* Send END OF POST message to the ME */ |
| static int me7_mkhi_end_of_post(void) |
| { |
| struct mkhi_header mkhi = { |
| .group_id = MKHI_GROUP_ID_GEN, |
| .command = MKHI_END_OF_POST, |
| }; |
| struct mei_header mei = { |
| .is_complete = 1, |
| .host_address = MEI_HOST_ADDRESS, |
| .client_address = MEI_ADDRESS_MKHI, |
| .length = sizeof(mkhi), |
| }; |
| |
| /* Send request and wait for response */ |
| if (mei_sendrecv(&mei, &mkhi, NULL, NULL, 0) < 0) { |
| printk(BIOS_ERR, "ME: END OF POST message failed\n"); |
| return -1; |
| } |
| |
| printk(BIOS_INFO, "ME: END OF POST message successful\n"); |
| return 0; |
| } |
| |
| void intel_me_finalize_smm(void) |
| { |
| union me_hfs hfs; |
| |
| update_mei_base_address(); |
| |
| /* S3 path will have hidden this device already */ |
| if (!is_mei_base_address_valid()) |
| return; |
| |
| /* Make sure ME is in a mode that expects EOP */ |
| hfs.raw = pci_read_config32(PCH_ME_DEV, PCI_ME_HFS); |
| |
| /* Abort and leave device alone if not normal mode */ |
| if (hfs.fpt_bad || |
| hfs.working_state != ME_HFS_CWS_NORMAL || |
| hfs.operation_mode != ME_HFS_MODE_NORMAL) |
| return; |
| |
| /* Try to send EOP command so ME stops accepting other commands */ |
| const u16 did = pci_read_config16(PCH_ME_DEV, PCI_DEVICE_ID); |
| switch (did) { |
| case 0x1c3a: |
| me7_mkhi_end_of_post(); |
| break; |
| case 0x1e3a: |
| me8_mkhi_end_of_post(); |
| break; |
| default: |
| printk(BIOS_ERR, "No finalize handler for ME %04x.\n", did); |
| } |
| |
| /* Make sure IO is disabled */ |
| pci_and_config16(PCH_ME_DEV, PCI_COMMAND, |
| ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO)); |
| |
| /* Hide the PCI device */ |
| RCBA32_OR(FD2, PCH_DISABLE_MEI1); |
| } |