/* 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); }