--- /dev/null
+/*
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+/*
+ * 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 <arch/hlt.h>
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/pci_ids.h>
+#include <device/pci_def.h>
+#include <string.h>
+#include <delay.h>
+
+#ifdef __SMM__
+# include <arch/romcc_io.h>
+# include <northbridge/intel/sandybridge/pcie_config.c>
+#else
+# include <device/device.h>
+# include <device/pci.h>
+#endif
+
+#include "me.h"
+#include "pch.h"
+
+#if CONFIG_CHROMEOS
+#include <vendorcode/google/chromeos/chromeos.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;
+
+#if CONFIG_DEBUG_INTEL_ME
+static void mei_dump(void *ptr, int dword, int offset, const char *type)
+{
+ struct mei_csr *csr;
+
+ 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;
+ }
+}
+#else
+# define mei_dump(ptr,dword,offset,type) do {} while (0)
+#endif
+
+/*
+ * 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);
+ 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, dword);
+ mei_dump(ptr, dword, offset, "WRITE");
+}
+
+#ifndef __SMM__
+static inline void pci_read_dword_ptr(device_t 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, 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);
+ 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 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 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 ndata, n/*, me_data_len*/;
+ unsigned 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;
+}
+
+/* Send END OF POST message to the ME */
+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;
+}
+
+#if (CONFIG_DEFAULT_CONSOLE_LOGLEVEL >= BIOS_DEBUG) && !defined(__SMM__)
+static inline void print_cap(const char *name, int state)
+{
+ printk(BIOS_DEBUG, "ME Capability: %-41s : %sabled\n",
+ name, state ? " en" : "dis");
+}
+
+static void 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 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);
+}
+#endif
+
+/* Tell ME to issue a global reset */
+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... */
+ hlt();
+ }
+
+ /* If the ME responded it rejected the reset request */
+ printk(BIOS_ERR, "ME: Global Reset failed\n");
+ return -1;
+}
+
+#ifdef __SMM__
+
+void intel_me_finalize_smm(void)
+{
+ struct me_hfs hfs;
+ u32 reg32;
+
+ mei_base_address =
+ pcie_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 == 0xfffffff0)
+ return;
+
+ /* Make sure ME is in a mode that expects EOP */
+ reg32 = pcie_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 = pcie_read_config32(PCH_ME_DEV, PCI_COMMAND);
+ reg32 &= ~(PCI_COMMAND_MASTER |
+ PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
+ pcie_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(device_t dev)
+{
+ me_bios_path path = ME_DISABLE_BIOS_PATH;
+ struct me_hfs hfs;
+ struct me_gmes gmes;
+
+#if CONFIG_HAVE_ACPI_RESUME
+ /* S3 wake skips all MKHI messages */
+ if (acpi_slp_type == 3) {
+ return ME_S3WAKE_BIOS_PATH;
+ }
+#endif
+
+ 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 for valid firmware */
+ if (hfs.fpt_bad)
+ return ME_ERROR_BIOS_PATH;
+
+ /* Check Current Working State */
+ switch (hfs.working_state) {
+ case ME_HFS_CWS_NORMAL:
+ path = ME_NORMAL_BIOS_PATH;
+ /* check if the MBP is ready */
+ if (!gmes.mbp_rdy) {
+ printk(BIOS_CRIT, "%s: mbp is not ready!\n",
+ __FUNCTION__);
+ return ME_ERROR_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 */
+ if (hfs.error_code)
+ path = ME_ERROR_BIOS_PATH;
+
+ return path;
+}
+
+/* Prepare ME for MEI messages */
+static int intel_mei_setup(device_t 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 = 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(device_t dev)
+{
+ struct me_heres status;
+ u32 extend;
+ 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;
+ }
+
+ /*
+ * TODO(dlaurie) Verify the hash against a saved good value.
+ */
+
+ for (i = 0; i < count; ++i) {
+ extend = pci_read_config32(dev, PCI_ME_HER(i));
+ printk(BIOS_DEBUG, "%08x", extend);
+ }
+ printk(BIOS_DEBUG, "\n");
+
+ return 0;
+}
+
+/* Hide the ME virtual PCI devices */
+static void intel_me_hide(device_t dev)
+{
+ dev->enabled = 0;
+ pch_enable(dev);
+}
+
+/* Check whether ME is present and do basic init */
+static void intel_me_init(device_t 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 (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);
+#endif
+ /* Tell ME that BIOS is done */
+ mkhi_end_of_post();
+ /* Hide the virtual PCI device */
+ intel_me_hide(dev);
+ break;
+
+ case ME_ERROR_BIOS_PATH:
+ case ME_RECOVERY_BIOS_PATH:
+ case ME_DISABLE_BIOS_PATH:
+ case ME_FIRMWARE_UPDATE_BIOS_PATH:
+ /*
+ * TODO(dlaurie) Force recovery mode if ME is unhappy?
+ */
+ break;
+ }
+}
+
+static void set_subsystem(device_t dev, unsigned vendor, unsigned device)
+{
+ if (!vendor || !device) {
+ pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
+ pci_read_config32(dev, PCI_VENDOR_ID));
+ } else {
+ pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
+ ((device & 0xffff) << 16) | (vendor & 0xffff));
+ }
+}
+
+static struct pci_operations pci_ops = {
+ .set_subsystem = 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,
+ .scan_bus = scan_static_bus,
+ .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!!!\n",
+ mbp_item_id);
+ return -1;
+ }
+
+ 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__ */
projects / coreboot.git / blobdiff