| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2011 The Chromium OS Authors. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; version 2 of |
| * the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| /* |
| * This is a ramstage driver for the Intel Management Engine found in the |
| * 6-series chipset. It handles the required boot-time messages over the |
| * MMIO-based Management Engine Interface to tell the ME that the BIOS is |
| * finished with POST. Additional messages are defined for debug but are |
| * not used unless the console loglevel is high enough. |
| */ |
| |
| #include <arch/acpi.h> |
| #include <device/mmio.h> |
| #include <device/pci_ops.h> |
| #include <console/console.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_def.h> |
| #include <string.h> |
| #include <delay.h> |
| #include <elog.h> |
| #include <halt.h> |
| |
| #ifndef __SMM__ |
| #include <device/device.h> |
| #include <device/pci.h> |
| #endif |
| |
| #include "me.h" |
| #include "pch.h" |
| |
| #if CONFIG(CHROMEOS) |
| #include <vendorcode/google/chromeos/chromeos.h> |
| #include <vendorcode/google/chromeos/gnvs.h> |
| #endif |
| |
| #ifndef __SMM__ |
| /* Path that the BIOS should take based on ME state */ |
| static const char *me_bios_path_values[] = { |
| [ME_NORMAL_BIOS_PATH] = "Normal", |
| [ME_S3WAKE_BIOS_PATH] = "S3 Wake", |
| [ME_ERROR_BIOS_PATH] = "Error", |
| [ME_RECOVERY_BIOS_PATH] = "Recovery", |
| [ME_DISABLE_BIOS_PATH] = "Disable", |
| [ME_FIRMWARE_UPDATE_BIOS_PATH] = "Firmware Update", |
| }; |
| static int intel_me_read_mbp(me_bios_payload *mbp_data); |
| #endif |
| |
| /* MMIO base address for MEI interface */ |
| static u32 *mei_base_address; |
| |
| |
| static void mei_dump(void *ptr, int dword, int offset, const char *type) |
| { |
| struct mei_csr *csr; |
| |
| if (!CONFIG(DEBUG_INTEL_ME)) |
| return; |
| |
| printk(BIOS_SPEW, "%-9s[%02x] : ", type, offset); |
| |
| switch (offset) { |
| case MEI_H_CSR: |
| case MEI_ME_CSR_HA: |
| csr = ptr; |
| if (!csr) { |
| printk(BIOS_SPEW, "ERROR: 0x%08x\n", dword); |
| break; |
| } |
| printk(BIOS_SPEW, "cbd=%u cbrp=%02u cbwp=%02u ready=%u " |
| "reset=%u ig=%u is=%u ie=%u\n", csr->buffer_depth, |
| csr->buffer_read_ptr, csr->buffer_write_ptr, |
| csr->ready, csr->reset, csr->interrupt_generate, |
| csr->interrupt_status, csr->interrupt_enable); |
| break; |
| case MEI_ME_CB_RW: |
| case MEI_H_CB_WW: |
| printk(BIOS_SPEW, "CB: 0x%08x\n", dword); |
| break; |
| default: |
| printk(BIOS_SPEW, "0x%08x\n", offset); |
| break; |
| } |
| } |
| |
| /* |
| * ME/MEI access helpers using memcpy to avoid aliasing. |
| */ |
| |
| static inline void mei_read_dword_ptr(void *ptr, int offset) |
| { |
| u32 dword = read32(mei_base_address + (offset/sizeof(u32))); |
| memcpy(ptr, &dword, sizeof(dword)); |
| mei_dump(ptr, dword, offset, "READ"); |
| } |
| |
| static inline void mei_write_dword_ptr(void *ptr, int offset) |
| { |
| u32 dword = 0; |
| memcpy(&dword, ptr, sizeof(dword)); |
| write32(mei_base_address + (offset/sizeof(u32)), dword); |
| mei_dump(ptr, dword, offset, "WRITE"); |
| } |
| |
| #ifndef __SMM__ |
| static inline void pci_read_dword_ptr(struct device *dev, void *ptr, int offset) |
| { |
| u32 dword = pci_read_config32(dev, offset); |
| memcpy(ptr, &dword, sizeof(dword)); |
| mei_dump(ptr, dword, offset, "PCI READ"); |
| } |
| #endif |
| |
| static inline void read_host_csr(struct mei_csr *csr) |
| { |
| mei_read_dword_ptr(csr, MEI_H_CSR); |
| } |
| |
| static inline void write_host_csr(struct mei_csr *csr) |
| { |
| mei_write_dword_ptr(csr, MEI_H_CSR); |
| } |
| |
| static inline void read_me_csr(struct mei_csr *csr) |
| { |
| mei_read_dword_ptr(csr, MEI_ME_CSR_HA); |
| } |
| |
| static inline void write_cb(u32 dword) |
| { |
| write32(mei_base_address + (MEI_H_CB_WW/sizeof(u32)), dword); |
| mei_dump(NULL, dword, MEI_H_CB_WW, "WRITE"); |
| } |
| |
| static inline u32 read_cb(void) |
| { |
| u32 dword = read32(mei_base_address + (MEI_ME_CB_RW/sizeof(u32))); |
| mei_dump(NULL, dword, MEI_ME_CB_RW, "READ"); |
| return dword; |
| } |
| |
| /* Wait for ME ready bit to be asserted */ |
| static int mei_wait_for_me_ready(void) |
| { |
| struct mei_csr me; |
| unsigned int try = ME_RETRY; |
| |
| while (try--) { |
| read_me_csr(&me); |
| if (me.ready) |
| return 0; |
| udelay(ME_DELAY); |
| } |
| |
| printk(BIOS_ERR, "ME: failed to become ready\n"); |
| return -1; |
| } |
| |
| static void mei_reset(void) |
| { |
| struct mei_csr host; |
| |
| if (mei_wait_for_me_ready() < 0) |
| return; |
| |
| /* Reset host and ME circular buffers for next message */ |
| read_host_csr(&host); |
| host.reset = 1; |
| host.interrupt_generate = 1; |
| write_host_csr(&host); |
| |
| if (mei_wait_for_me_ready() < 0) |
| return; |
| |
| /* Re-init and indicate host is ready */ |
| read_host_csr(&host); |
| host.interrupt_generate = 1; |
| host.ready = 1; |
| host.reset = 0; |
| write_host_csr(&host); |
| } |
| |
| static int mei_send_msg(struct mei_header *mei, struct mkhi_header *mkhi, |
| void *req_data) |
| { |
| struct mei_csr host; |
| unsigned int ndata, n; |
| u32 *data; |
| |
| /* Number of dwords to write, ignoring MKHI */ |
| ndata = mei->length >> 2; |
| |
| /* Pad non-dword aligned request message length */ |
| if (mei->length & 3) |
| ndata++; |
| if (!ndata) { |
| printk(BIOS_DEBUG, "ME: request does not include MKHI\n"); |
| return -1; |
| } |
| ndata++; /* Add MEI header */ |
| |
| /* |
| * Make sure there is still room left in the circular buffer. |
| * Reset the buffer pointers if the requested message will not fit. |
| */ |
| read_host_csr(&host); |
| if ((host.buffer_depth - host.buffer_write_ptr) < ndata) { |
| printk(BIOS_ERR, "ME: circular buffer full, resetting...\n"); |
| mei_reset(); |
| read_host_csr(&host); |
| } |
| |
| /* |
| * This implementation does not handle splitting large messages |
| * across multiple transactions. Ensure the requested length |
| * will fit in the available circular buffer depth. |
| */ |
| if ((host.buffer_depth - host.buffer_write_ptr) < ndata) { |
| printk(BIOS_ERR, "ME: message (%u) too large for buffer (%u)\n", |
| ndata + 2, host.buffer_depth); |
| return -1; |
| } |
| |
| /* Write MEI header */ |
| mei_write_dword_ptr(mei, MEI_H_CB_WW); |
| ndata--; |
| |
| /* Write MKHI header */ |
| mei_write_dword_ptr(mkhi, MEI_H_CB_WW); |
| ndata--; |
| |
| /* Write message data */ |
| data = req_data; |
| for (n = 0; n < ndata; ++n) |
| write_cb(*data++); |
| |
| /* Generate interrupt to the ME */ |
| read_host_csr(&host); |
| host.interrupt_generate = 1; |
| write_host_csr(&host); |
| |
| /* Make sure ME is ready after sending request data */ |
| return mei_wait_for_me_ready(); |
| } |
| |
| static int mei_recv_msg(struct mkhi_header *mkhi, |
| void *rsp_data, int rsp_bytes) |
| { |
| struct mei_header mei_rsp; |
| struct mkhi_header mkhi_rsp; |
| struct mei_csr me, host; |
| unsigned int ndata, n/*, me_data_len*/; |
| unsigned int expected; |
| u32 *data; |
| |
| /* Total number of dwords to read from circular buffer */ |
| expected = (rsp_bytes + sizeof(mei_rsp) + sizeof(mkhi_rsp)) >> 2; |
| if (rsp_bytes & 3) |
| expected++; |
| |
| /* |
| * The interrupt status bit does not appear to indicate that the |
| * message has actually been received. Instead we wait until the |
| * expected number of dwords are present in the circular buffer. |
| */ |
| for (n = ME_RETRY; n; --n) { |
| read_me_csr(&me); |
| if ((me.buffer_write_ptr - me.buffer_read_ptr) >= expected) |
| break; |
| udelay(ME_DELAY); |
| } |
| if (!n) { |
| printk(BIOS_ERR, "ME: timeout waiting for data: expected " |
| "%u, available %u\n", expected, |
| me.buffer_write_ptr - me.buffer_read_ptr); |
| return -1; |
| } |
| |
| /* Read and verify MEI response header from the ME */ |
| mei_read_dword_ptr(&mei_rsp, MEI_ME_CB_RW); |
| if (!mei_rsp.is_complete) { |
| printk(BIOS_ERR, "ME: response is not complete\n"); |
| return -1; |
| } |
| |
| /* Handle non-dword responses and expect at least MKHI header */ |
| ndata = mei_rsp.length >> 2; |
| if (mei_rsp.length & 3) |
| ndata++; |
| if (ndata != (expected - 1)) { |
| printk(BIOS_ERR, "ME: response is missing data %d != %d\n", |
| ndata, (expected - 1)); |
| return -1; |
| } |
| |
| /* Read and verify MKHI response header from the ME */ |
| mei_read_dword_ptr(&mkhi_rsp, MEI_ME_CB_RW); |
| if (!mkhi_rsp.is_response || |
| mkhi->group_id != mkhi_rsp.group_id || |
| mkhi->command != mkhi_rsp.command) { |
| printk(BIOS_ERR, "ME: invalid response, group %u ?= %u," |
| "command %u ?= %u, is_response %u\n", mkhi->group_id, |
| mkhi_rsp.group_id, mkhi->command, mkhi_rsp.command, |
| mkhi_rsp.is_response); |
| return -1; |
| } |
| ndata--; /* MKHI header has been read */ |
| |
| /* Make sure caller passed a buffer with enough space */ |
| if (ndata != (rsp_bytes >> 2)) { |
| printk(BIOS_ERR, "ME: not enough room in response buffer: " |
| "%u != %u\n", ndata, rsp_bytes >> 2); |
| return -1; |
| } |
| |
| /* Read response data from the circular buffer */ |
| data = rsp_data; |
| for (n = 0; n < ndata; ++n) |
| *data++ = read_cb(); |
| |
| /* Tell the ME that we have consumed the response */ |
| read_host_csr(&host); |
| host.interrupt_status = 1; |
| host.interrupt_generate = 1; |
| write_host_csr(&host); |
| |
| return mei_wait_for_me_ready(); |
| } |
| |
| static inline int mei_sendrecv(struct mei_header *mei, struct mkhi_header *mkhi, |
| void *req_data, void *rsp_data, int rsp_bytes) |
| { |
| if (mei_send_msg(mei, mkhi, req_data) < 0) |
| return -1; |
| if (mei_recv_msg(mkhi, rsp_data, rsp_bytes) < 0) |
| return -1; |
| return 0; |
| } |
| |
| static inline void print_cap(const char *name, int state) |
| { |
| printk(BIOS_DEBUG, "ME Capability: %-41s : %sabled\n", |
| name, state ? " en" : "dis"); |
| } |
| |
| static void __unused me_print_fw_version(mbp_fw_version_name *vers_name) |
| { |
| if (!vers_name->major_version) { |
| printk(BIOS_ERR, "ME: mbp missing version report\n"); |
| return; |
| } |
| |
| printk(BIOS_DEBUG, "ME: found version %d.%d.%d.%d\n", |
| vers_name->major_version, vers_name->minor_version, |
| vers_name->hotfix_version, vers_name->build_version); |
| } |
| |
| /* Get ME Firmware Capabilities */ |
| static int mkhi_get_fwcaps(mefwcaps_sku *cap) |
| { |
| u32 rule_id = 0; |
| struct me_fwcaps cap_msg; |
| struct mkhi_header mkhi = { |
| .group_id = MKHI_GROUP_ID_FWCAPS, |
| .command = MKHI_FWCAPS_GET_RULE, |
| }; |
| struct mei_header mei = { |
| .is_complete = 1, |
| .host_address = MEI_HOST_ADDRESS, |
| .client_address = MEI_ADDRESS_MKHI, |
| .length = sizeof(mkhi) + sizeof(rule_id), |
| }; |
| |
| /* Send request and wait for response */ |
| if (mei_sendrecv(&mei, &mkhi, &rule_id, &cap_msg, sizeof(cap_msg)) < 0) { |
| printk(BIOS_ERR, "ME: GET FWCAPS message failed\n"); |
| return -1; |
| } |
| *cap = cap_msg.caps_sku; |
| return 0; |
| } |
| |
| /* Get ME Firmware Capabilities */ |
| static void __unused me_print_fwcaps(mbp_fw_caps *caps_section) |
| { |
| mefwcaps_sku *cap = &caps_section->fw_capabilities; |
| if (!caps_section->available) { |
| printk(BIOS_ERR, "ME: mbp missing fwcaps report\n"); |
| if (mkhi_get_fwcaps(cap)) |
| return; |
| } |
| |
| print_cap("Full Network manageability", cap->full_net); |
| print_cap("Regular Network manageability", cap->std_net); |
| print_cap("Manageability", cap->manageability); |
| print_cap("Small business technology", cap->small_business); |
| print_cap("Level III manageability", cap->l3manageability); |
| print_cap("IntelR Anti-Theft (AT)", cap->intel_at); |
| print_cap("IntelR Capability Licensing Service (CLS)", cap->intel_cls); |
| print_cap("IntelR Power Sharing Technology (MPC)", cap->intel_mpc); |
| print_cap("ICC Over Clocking", cap->icc_over_clocking); |
| print_cap("Protected Audio Video Path (PAVP)", cap->pavp); |
| print_cap("IPV6", cap->ipv6); |
| print_cap("KVM Remote Control (KVM)", cap->kvm); |
| print_cap("Outbreak Containment Heuristic (OCH)", cap->och); |
| print_cap("Virtual LAN (VLAN)", cap->vlan); |
| print_cap("TLS", cap->tls); |
| print_cap("Wireless LAN (WLAN)", cap->wlan); |
| } |
| |
| #if CONFIG(CHROMEOS) && 0 /* DISABLED */ |
| /* Tell ME to issue a global reset */ |
| static int mkhi_global_reset(void) |
| { |
| struct me_global_reset reset = { |
| .request_origin = GLOBAL_RESET_BIOS_POST, |
| .reset_type = CBM_RR_GLOBAL_RESET, |
| }; |
| struct mkhi_header mkhi = { |
| .group_id = MKHI_GROUP_ID_CBM, |
| .command = MKHI_GLOBAL_RESET, |
| }; |
| struct mei_header mei = { |
| .is_complete = 1, |
| .length = sizeof(mkhi) + sizeof(reset), |
| .host_address = MEI_HOST_ADDRESS, |
| .client_address = MEI_ADDRESS_MKHI, |
| }; |
| |
| /* Send request and wait for response */ |
| printk(BIOS_NOTICE, "ME: %s\n", __FUNCTION__); |
| if (mei_sendrecv(&mei, &mkhi, &reset, NULL, 0) < 0) { |
| /* No response means reset will happen shortly... */ |
| halt(); |
| } |
| |
| /* If the ME responded it rejected the reset request */ |
| printk(BIOS_ERR, "ME: Global Reset failed\n"); |
| return -1; |
| } |
| #endif |
| |
| #ifdef __SMM__ |
| |
| /* Send END OF POST message to the ME */ |
| static int 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", __FUNCTION__); |
| 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; |
| } |
| |
| void intel_me8_finalize_smm(void) |
| { |
| struct me_hfs hfs; |
| u32 reg32; |
| |
| mei_base_address = (void *) |
| (pci_read_config32(PCH_ME_DEV, PCI_BASE_ADDRESS_0) & ~0xf); |
| |
| /* S3 path will have hidden this device already */ |
| if (!mei_base_address || mei_base_address == (u32 *)0xfffffff0) |
| return; |
| |
| /* Make sure ME is in a mode that expects EOP */ |
| reg32 = pci_read_config32(PCH_ME_DEV, PCI_ME_HFS); |
| memcpy(&hfs, ®32, sizeof(u32)); |
| |
| /* 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 */ |
| mkhi_end_of_post(); |
| |
| /* Make sure IO is disabled */ |
| reg32 = pci_read_config32(PCH_ME_DEV, PCI_COMMAND); |
| reg32 &= ~(PCI_COMMAND_MASTER | |
| PCI_COMMAND_MEMORY | PCI_COMMAND_IO); |
| pci_write_config32(PCH_ME_DEV, PCI_COMMAND, reg32); |
| |
| /* Hide the PCI device */ |
| RCBA32_OR(FD2, PCH_DISABLE_MEI1); |
| } |
| |
| #else /* !__SMM__ */ |
| |
| /* Determine the path that we should take based on ME status */ |
| static me_bios_path intel_me_path(struct device *dev) |
| { |
| me_bios_path path = ME_DISABLE_BIOS_PATH; |
| struct me_hfs hfs; |
| struct me_gmes gmes; |
| |
| /* S3 wake skips all MKHI messages */ |
| if (acpi_is_wakeup_s3()) |
| return ME_S3WAKE_BIOS_PATH; |
| |
| pci_read_dword_ptr(dev, &hfs, PCI_ME_HFS); |
| pci_read_dword_ptr(dev, &gmes, PCI_ME_GMES); |
| |
| /* Check and dump status */ |
| intel_me_status(&hfs, &gmes); |
| |
| /* Check Current Working State */ |
| switch (hfs.working_state) { |
| case ME_HFS_CWS_NORMAL: |
| path = ME_NORMAL_BIOS_PATH; |
| break; |
| case ME_HFS_CWS_REC: |
| path = ME_RECOVERY_BIOS_PATH; |
| break; |
| default: |
| path = ME_DISABLE_BIOS_PATH; |
| break; |
| } |
| |
| /* Check Current Operation Mode */ |
| switch (hfs.operation_mode) { |
| case ME_HFS_MODE_NORMAL: |
| break; |
| case ME_HFS_MODE_DEBUG: |
| case ME_HFS_MODE_DIS: |
| case ME_HFS_MODE_OVER_JMPR: |
| case ME_HFS_MODE_OVER_MEI: |
| default: |
| path = ME_DISABLE_BIOS_PATH; |
| break; |
| } |
| |
| /* Check for any error code and valid firmware and MBP */ |
| if (hfs.error_code || hfs.fpt_bad) |
| path = ME_ERROR_BIOS_PATH; |
| |
| /* Check if the MBP is ready */ |
| if (!gmes.mbp_rdy) { |
| printk(BIOS_CRIT, "%s: mbp is not ready!\n", |
| __FUNCTION__); |
| path = ME_ERROR_BIOS_PATH; |
| } |
| |
| if (CONFIG(ELOG) && path != ME_NORMAL_BIOS_PATH) { |
| struct elog_event_data_me_extended data = { |
| .current_working_state = hfs.working_state, |
| .operation_state = hfs.operation_state, |
| .operation_mode = hfs.operation_mode, |
| .error_code = hfs.error_code, |
| .progress_code = gmes.progress_code, |
| .current_pmevent = gmes.current_pmevent, |
| .current_state = gmes.current_state, |
| }; |
| elog_add_event_byte(ELOG_TYPE_MANAGEMENT_ENGINE, path); |
| elog_add_event_raw(ELOG_TYPE_MANAGEMENT_ENGINE_EXT, |
| &data, sizeof(data)); |
| } |
| |
| return path; |
| } |
| |
| /* Prepare ME for MEI messages */ |
| static int intel_mei_setup(struct device *dev) |
| { |
| struct resource *res; |
| struct mei_csr host; |
| u32 reg32; |
| |
| /* Find the MMIO base for the ME interface */ |
| res = find_resource(dev, PCI_BASE_ADDRESS_0); |
| if (!res || res->base == 0 || res->size == 0) { |
| printk(BIOS_DEBUG, "ME: MEI resource not present!\n"); |
| return -1; |
| } |
| mei_base_address = (u32 *)(uintptr_t)res->base; |
| |
| /* Ensure Memory and Bus Master bits are set */ |
| reg32 = pci_read_config32(dev, PCI_COMMAND); |
| reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY; |
| pci_write_config32(dev, PCI_COMMAND, reg32); |
| |
| /* Clean up status for next message */ |
| read_host_csr(&host); |
| host.interrupt_generate = 1; |
| host.ready = 1; |
| host.reset = 0; |
| write_host_csr(&host); |
| |
| return 0; |
| } |
| |
| /* Read the Extend register hash of ME firmware */ |
| static int intel_me_extend_valid(struct device *dev) |
| { |
| struct me_heres status; |
| u32 extend[8] = {0}; |
| int i, count = 0; |
| |
| pci_read_dword_ptr(dev, &status, PCI_ME_HERES); |
| if (!status.extend_feature_present) { |
| printk(BIOS_ERR, "ME: Extend Feature not present\n"); |
| return -1; |
| } |
| |
| if (!status.extend_reg_valid) { |
| printk(BIOS_ERR, "ME: Extend Register not valid\n"); |
| return -1; |
| } |
| |
| switch (status.extend_reg_algorithm) { |
| case PCI_ME_EXT_SHA1: |
| count = 5; |
| printk(BIOS_DEBUG, "ME: Extend SHA-1: "); |
| break; |
| case PCI_ME_EXT_SHA256: |
| count = 8; |
| printk(BIOS_DEBUG, "ME: Extend SHA-256: "); |
| break; |
| default: |
| printk(BIOS_ERR, "ME: Extend Algorithm %d unknown\n", |
| status.extend_reg_algorithm); |
| return -1; |
| } |
| |
| for (i = 0; i < count; ++i) { |
| extend[i] = pci_read_config32(dev, PCI_ME_HER(i)); |
| printk(BIOS_DEBUG, "%08x", extend[i]); |
| } |
| printk(BIOS_DEBUG, "\n"); |
| |
| #if CONFIG(CHROMEOS) |
| /* Save hash in NVS for the OS to verify */ |
| chromeos_set_me_hash(extend, count); |
| #endif |
| |
| return 0; |
| } |
| |
| /* Hide the ME virtual PCI devices */ |
| static void intel_me_hide(struct device *dev) |
| { |
| dev->enabled = 0; |
| pch_enable(dev); |
| } |
| |
| /* Check whether ME is present and do basic init */ |
| static void intel_me_init(struct device *dev) |
| { |
| me_bios_path path = intel_me_path(dev); |
| me_bios_payload mbp_data; |
| |
| /* Do initial setup and determine the BIOS path */ |
| printk(BIOS_NOTICE, "ME: BIOS path: %s\n", me_bios_path_values[path]); |
| |
| switch (path) { |
| case ME_S3WAKE_BIOS_PATH: |
| intel_me_hide(dev); |
| break; |
| |
| case ME_NORMAL_BIOS_PATH: |
| /* Validate the extend register */ |
| if (intel_me_extend_valid(dev) < 0) |
| break; /* TODO: force recovery mode */ |
| |
| /* Prepare MEI MMIO interface */ |
| if (intel_mei_setup(dev) < 0) |
| break; |
| |
| if (intel_me_read_mbp(&mbp_data)) |
| break; |
| |
| #if CONFIG(CHROMEOS) && 0 /* DISABLED */ |
| /* |
| * Unlock ME in recovery mode. |
| */ |
| if (vboot_recovery_mode_enabled()) { |
| /* Unlock ME flash region */ |
| mkhi_hmrfpo_enable(); |
| |
| /* Issue global reset */ |
| mkhi_global_reset(); |
| return; |
| } |
| #endif |
| |
| if (CONFIG_DEFAULT_CONSOLE_LOGLEVEL >= BIOS_DEBUG) { |
| me_print_fw_version(&mbp_data.fw_version_name); |
| me_print_fwcaps(&mbp_data.fw_caps_sku); |
| } |
| |
| /* |
| * Leave the ME unlocked in this path. |
| * It will be locked via SMI command later. |
| */ |
| break; |
| |
| case ME_ERROR_BIOS_PATH: |
| case ME_RECOVERY_BIOS_PATH: |
| case ME_DISABLE_BIOS_PATH: |
| case ME_FIRMWARE_UPDATE_BIOS_PATH: |
| break; |
| } |
| } |
| |
| static struct pci_operations pci_ops = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| static struct device_operations device_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = intel_me_init, |
| .ops_pci = &pci_ops, |
| }; |
| |
| static const struct pci_driver intel_me __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = 0x1e3a, |
| }; |
| |
| /****************************************************************************** |
| * */ |
| static u32 me_to_host_words_pending(void) |
| { |
| struct mei_csr me; |
| read_me_csr(&me); |
| if (!me.ready) |
| return 0; |
| return (me.buffer_write_ptr - me.buffer_read_ptr) & |
| (me.buffer_depth - 1); |
| } |
| |
| #if 0 |
| /* This function is not yet being used, keep it in for the future. */ |
| static u32 host_to_me_words_room(void) |
| { |
| struct mei_csr csr; |
| |
| read_me_csr(&csr); |
| if (!csr.ready) |
| return 0; |
| |
| read_host_csr(&csr); |
| return (csr.buffer_read_ptr - csr.buffer_write_ptr - 1) & |
| (csr.buffer_depth - 1); |
| } |
| #endif |
| /* |
| * mbp seems to be following its own flow, let's retrieve it in a dedicated |
| * function. |
| */ |
| static int intel_me_read_mbp(me_bios_payload *mbp_data) |
| { |
| mbp_header mbp_hdr; |
| mbp_item_header mbp_item_hdr; |
| u32 me2host_pending; |
| u32 mbp_item_id; |
| struct mei_csr host; |
| |
| me2host_pending = me_to_host_words_pending(); |
| if (!me2host_pending) { |
| printk(BIOS_ERR, "ME: no mbp data!\n"); |
| return -1; |
| } |
| |
| /* we know for sure that at least the header is there */ |
| mei_read_dword_ptr(&mbp_hdr, MEI_ME_CB_RW); |
| |
| if ((mbp_hdr.num_entries > (mbp_hdr.mbp_size / 2)) || |
| (me2host_pending < mbp_hdr.mbp_size)) { |
| printk(BIOS_ERR, "ME: mbp of %d entries, total size %d words" |
| " buffer contains %d words\n", |
| mbp_hdr.num_entries, mbp_hdr.mbp_size, |
| me2host_pending); |
| return -1; |
| } |
| |
| me2host_pending--; |
| memset(mbp_data, 0, sizeof(*mbp_data)); |
| |
| while (mbp_hdr.num_entries--) { |
| u32 *copy_addr; |
| u32 copy_size, buffer_room; |
| void *p; |
| |
| if (!me2host_pending) { |
| printk(BIOS_ERR, "ME: no mbp data %d entries to go!\n", |
| mbp_hdr.num_entries + 1); |
| return -1; |
| } |
| |
| mei_read_dword_ptr(&mbp_item_hdr, MEI_ME_CB_RW); |
| |
| if (mbp_item_hdr.length > me2host_pending) { |
| printk(BIOS_ERR, "ME: insufficient mbp data %d " |
| "entries to go!\n", |
| mbp_hdr.num_entries + 1); |
| return -1; |
| } |
| |
| me2host_pending -= mbp_item_hdr.length; |
| |
| mbp_item_id = (((u32)mbp_item_hdr.item_id) << 8) + |
| mbp_item_hdr.app_id; |
| |
| copy_size = mbp_item_hdr.length - 1; |
| |
| #define SET_UP_COPY(field) { copy_addr = (u32 *)&mbp_data->field; \ |
| buffer_room = sizeof(mbp_data->field) / sizeof(u32); \ |
| break; \ |
| } |
| |
| p = &mbp_item_hdr; |
| printk(BIOS_INFO, "ME: MBP item header %8.8x\n", *((u32*)p)); |
| |
| switch (mbp_item_id) { |
| case 0x101: |
| SET_UP_COPY(fw_version_name); |
| |
| case 0x102: |
| SET_UP_COPY(icc_profile); |
| |
| case 0x103: |
| SET_UP_COPY(at_state); |
| |
| case 0x201: |
| mbp_data->fw_caps_sku.available = 1; |
| SET_UP_COPY(fw_caps_sku.fw_capabilities); |
| |
| case 0x301: |
| SET_UP_COPY(rom_bist_data); |
| |
| case 0x401: |
| SET_UP_COPY(platform_key); |
| |
| case 0x501: |
| mbp_data->fw_plat_type.available = 1; |
| SET_UP_COPY(fw_plat_type.rule_data); |
| |
| case 0x601: |
| SET_UP_COPY(mfsintegrity); |
| |
| default: |
| printk(BIOS_ERR, "ME: unknown mbp item id 0x%x! Skipping\n", |
| mbp_item_id); |
| while (copy_size--) |
| read_cb(); |
| continue; |
| } |
| |
| if (buffer_room != copy_size) { |
| printk(BIOS_ERR, "ME: buffer room %d != %d copy size" |
| " for item 0x%x!!!\n", |
| buffer_room, copy_size, mbp_item_id); |
| return -1; |
| } |
| while (copy_size--) |
| *copy_addr++ = read_cb(); |
| } |
| |
| read_host_csr(&host); |
| host.interrupt_generate = 1; |
| write_host_csr(&host); |
| |
| { |
| int cntr = 0; |
| while (host.interrupt_generate) { |
| read_host_csr(&host); |
| cntr++; |
| } |
| printk(BIOS_SPEW, "ME: mbp read OK after %d cycles\n", cntr); |
| } |
| |
| return 0; |
| } |
| |
| #endif /* !__SMM__ */ |