mainboard/dell: Add new mainboard XPS 8300 (Sandy Bridge)

[coreboot.git] / util / intelmetool / me.c

/* SPDX-License-Identifier: GPL-2.0-only */

#include <pci/pci.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/io.h>
#include <assert.h>
#include <unistd.h>

#include "intelmetool.h"
#include "me.h"
#include "mmap.h"

#define read32(addr, off) ( *((uint32_t *) (addr + off)) )
#define write32(addr, off, val) ( *((uint32_t *) (addr + off)) = val)

/* 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",
};
*/

/* MMIO base address for MEI interface */
static uint32_t mei_base_address;
static uint8_t* mei_mmap;

static void mei_dump(void *ptr, int dword, int offset, const char *type)
{
        /* struct mei_csr *csr; */


        switch (offset) {
        case MEI_H_CSR:
        case MEI_ME_CSR_HA:
/*
                csr = ptr;
                if (!csr) {
                printf("%-9s[%02x] : ", type, offset);
                        printf("ERROR: 0x%08x\n", dword);
                        break;
                }
                printf("%-9s[%02x] : ", type, offset);
                printf("depth=%u read=%02u write=%02u ready=%u "
                       "reset=%u intgen=%u intstatus=%u intenable=%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:
                printf("%-9s[%02x] : ", type, offset);
                printf("CB: 0x%08x\n", dword);
                break;
        default:
                printf("%-9s[%02x] : ", type, offset);
                printf("0x%08x\n", offset);
                break;
        }
}

/*
 * ME/MEI access helpers using memcpy to avoid aliasing.
 */

static inline void mei_read_dword_ptr(void *ptr, uint32_t offset)
{
        uint32_t dword = read32(mei_mmap, offset);
        memcpy(ptr, &dword, sizeof(dword));

        if (debug) {
                mei_dump(ptr, dword, offset, "READ");
        }
}

static inline void mei_write_dword_ptr(void *ptr, uint32_t offset)
{
        uint32_t dword = 0;
        memcpy(&dword, ptr, sizeof(dword));
        write32(mei_mmap, offset, dword);

        if (debug) {
                mei_dump(ptr, dword, offset, "WRITE");
        }
}

static inline void pci_read_dword_ptr(struct pci_dev *dev, void *ptr, uint32_t offset)
{
        uint32_t dword = pci_read_long(dev, offset);
        memcpy(ptr, &dword, sizeof(dword));

        if (debug) {
                mei_dump(ptr, dword, offset, "PCI READ");
        }
}

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(uint32_t dword)
{
        write32(mei_mmap, MEI_H_CB_WW, dword);

        if (debug) {
                mei_dump(NULL, dword, MEI_H_CB_WW, "WRITE");
        }
}

static inline uint32_t read_cb(void)
{
        uint32_t dword = read32(mei_mmap, MEI_ME_CB_RW);

        if (debug) {
                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;
                usleep(ME_DELAY);
        }

        printf("ME: failed to become ready\n");
        return -1;
}

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;
        uint32_t *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) {
                printf("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) {
                printf("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) {
                printf("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 mei_header *mei, struct mkhi_header *mkhi,
                        void *rsp_data, uint32_t rsp_bytes)
{
        struct mei_header mei_rsp;
        struct mkhi_header mkhi_rsp;
        struct mei_csr me, host;
        unsigned ndata, n;
        unsigned expected;
        uint32_t *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++;

        if (debug) {
                printf("expected u32 = %d\n", 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)
                //if (me.interrupt_generate && !me.interrupt_status)
                //if (me.interrupt_status)
                        break;
                usleep(ME_DELAY);
        }
        if (!n) {
                printf("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) {
                printf("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)) {  //XXX
                printf("ME: response is missing data\n");
                //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) {
                printf("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)) {
                printf("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, uint32_t rsp_bytes)
{
        if (mei_send_msg(mei, mkhi, req_data) < 0)
                return -1;
        if (mei_recv_msg(mei, mkhi, rsp_data, rsp_bytes) < 0)
                return -1;
        return 0;
}

/* 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),
        };

        if (mei_sendrecv(&mei, &mkhi, NULL, NULL, 0) < 0) {
                printf("ME: END OF POST message failed\n");
                return -1;
        }

        printf("ME: END OF POST message successful\n");
        return 0;
}
*/

/* Get ME firmware version */
int mkhi_get_fw_version(int *major, int *minor)
{
        uint32_t data = 0;
        struct me_fw_version version = {0};

        struct mkhi_header mkhi = {
                .group_id       = MKHI_GROUP_ID_GEN,
                .command        = GEN_GET_FW_VERSION,
                .is_response    = 0,
        };

        struct mei_header mei = {
                .is_complete    = 1,
                .host_address   = MEI_HOST_ADDRESS,
                .client_address = MEI_ADDRESS_MKHI,
                .length         = sizeof(mkhi),
        };

#ifndef OLDARC
        /* Send request and wait for response */
        if (mei_sendrecv(&mei, &mkhi, &data, &version, sizeof(version) ) < 0) {
                printf("ME: GET FW VERSION message failed\n");
                return -1;
        }
        printf("ME: Firmware Version %u.%u.%u.%u (code) "
               "%u.%u.%u.%u (recovery) "
               "%u.%u.%u.%u (fitc)\n\n",
               version.code_major, version.code_minor,
               version.code_build_number, version.code_hot_fix,
               version.recovery_major, version.recovery_minor,
               version.recovery_build_number, version.recovery_hot_fix,
               version.fitcmajor, version.fitcminor,
               version.fitcbuildno, version.fitchotfix);
#else
        /* Send request and wait for response */
        if (mei_sendrecv(&mei, &mkhi, &data, &version, 2*sizeof(uint32_t) ) < 0) {
                printf("ME: GET FW VERSION message failed\n");
                return -1;
        }
        printf("ME: Firmware Version %u.%u (code)\n\n",
               version.code_major, version.code_minor);
#endif
        if (major)
                *major = version.code_major;
        if (minor)
                *minor = version.code_minor;
        return 0;
}

static void print_cap(const char *name, int state)
{
        printf("ME Capability: %-30s : %s\n",
               name, state ? CRED "ON" RESET : CGRN "OFF" RESET);
}

/* Get ME Firmware Capabilities */
int mkhi_get_fwcaps(void)
{
        struct {
                uint32_t rule_id;
                uint32_t rule_len;

                struct me_fwcaps cap;
        } fwcaps;

        fwcaps.rule_id = 0;
        fwcaps.rule_len = 0;

        struct mkhi_header mkhi = {
                .group_id       = MKHI_GROUP_ID_FWCAPS,
                .command        = MKHI_FWCAPS_GET_RULE,
                .is_response    = 0,
        };
        struct mei_header mei = {
                .is_complete    = 1,
                .host_address   = MEI_HOST_ADDRESS,
                .client_address = MEI_ADDRESS_MKHI,
                .length         = sizeof(mkhi) + sizeof(fwcaps.rule_id),
        };

        /* Send request and wait for response */
        if (mei_sendrecv(&mei, &mkhi, &fwcaps.rule_id, &fwcaps.cap, sizeof(fwcaps.cap)) < 0) {
                printf("ME: GET FWCAPS message failed\n");
                return -1;
        }

        print_cap("Full Network manageability                ", fwcaps.cap.caps_sku.full_net);
        print_cap("Regular Network manageability             ", fwcaps.cap.caps_sku.std_net);
        print_cap("Manageability                             ", fwcaps.cap.caps_sku.manageability);
        print_cap("Small business technology                 ", fwcaps.cap.caps_sku.small_business);
        print_cap("Level III manageability                   ", fwcaps.cap.caps_sku.l3manageability);
        print_cap("IntelR Anti-Theft (AT)                    ", fwcaps.cap.caps_sku.intel_at);
        print_cap("IntelR Capability Licensing Service (CLS) ", fwcaps.cap.caps_sku.intel_cls);
        print_cap("IntelR Power Sharing Technology (MPC)     ", fwcaps.cap.caps_sku.intel_mpc);
        print_cap("ICC Over Clocking                         ", fwcaps.cap.caps_sku.icc_over_clocking);
        print_cap("Protected Audio Video Path (PAVP)         ", fwcaps.cap.caps_sku.pavp);
        print_cap("IPV6                                      ", fwcaps.cap.caps_sku.ipv6);
        print_cap("KVM Remote Control (KVM)                  ", fwcaps.cap.caps_sku.kvm);
        print_cap("Outbreak Containment Heuristic (OCH)      ", fwcaps.cap.caps_sku.och);
        print_cap("Virtual LAN (VLAN)                        ", fwcaps.cap.caps_sku.vlan);
        print_cap("TLS                                       ", fwcaps.cap.caps_sku.tls);
        print_cap("Wireless LAN (WLAN)                       ", fwcaps.cap.caps_sku.wlan);

        return 0;
}

/* Tell ME to issue a global reset */
uint32_t 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,
        };

        printf("ME: Requesting global reset\n");

        /* Send request and wait for response */
        if (mei_sendrecv(&mei, &mkhi, &reset, NULL, 0) < 0) {
                /* No response means reset will happen shortly... */
                asm("hlt");
        }

        /* If the ME responded it rejected the reset request */
        printf("ME: Global Reset failed\n");
        return -1;
}

/* Tell ME thermal reporting parameters */
/*
void mkhi_thermal(void)
{
        struct me_thermal_reporting thermal = {
                .polling_timeout = 2,
                .smbus_ec_msglen = 1,
                .smbus_ec_msgpec = 0,
                .dimmnumber = 4,
        };
        struct mkhi_header mkhi = {
                .group_id       = MKHI_GROUP_ID_CBM,
                .command        = MKHI_THERMAL_REPORTING,
        };
        struct mei_header mei = {
                .is_complete    = 1,
                .length         = sizeof(mkhi) + sizeof(thermal),
                .host_address   = MEI_HOST_ADDRESS,
                .client_address = MEI_ADDRESS_THERMAL,
        };

        printf("ME: Sending thermal reporting params\n");

        mei_sendrecv(&mei, &mkhi, &thermal, NULL, 0);
}
*/

/* Enable debug of internal ME memory */
int mkhi_debug_me_memory(void *physaddr)
{
        uint32_t data = 0;

        /* copy whole ME memory to a readable space */
        struct me_debug_mem memory = {
                .debug_phys = (uintptr_t)physaddr,
                .debug_size = 0x2000000,
                .me_phys = 0x20000000,
                .me_size = 0x2000000,
        };
        struct mkhi_header mkhi = {
                .group_id       = MKHI_GROUP_ID_GEN,
                .command        = GEN_SET_DEBUG_MEM,
                .is_response    = 0,
        };
        struct mei_header mei = {
                .is_complete    = 1,
                .length         = sizeof(mkhi) + sizeof(memory),
                .host_address   = MEI_HOST_ADDRESS,
                .client_address = MEI_ADDRESS_MKHI,
        };

        printf("ME: Debug memory to 0x%zx ...", (size_t)physaddr);
        if (mei_sendrecv(&mei, &mkhi, &memory, &data, 0) < 0) {
                printf("failed\n");
                return -1;
        } else {
                printf("done\n");
        }
        return 0;
}

/* Prepare ME for MEI messages */
uint32_t intel_mei_setup(struct pci_dev *dev)
{
        struct mei_csr host;
        uint16_t reg16;
        uint32_t pagerounded;

        mei_base_address = dev->base_addr[0] & ~0xf;
        pagerounded = mei_base_address & ~0xfff;
        mei_mmap = map_physical(pagerounded, 0x2000);
        mei_mmap += mei_base_address - pagerounded;
        if (mei_mmap == NULL) {
                printf("Could not map ME setup memory.\n"
                       "Do you have kernel cmdline argument 'iomem=relaxed' set ?\n");
                return 1;
        }

        /* Ensure Memory and Bus Master bits are set */
        reg16 = pci_read_word(dev, PCI_COMMAND);
        reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
        pci_write_word(dev, PCI_COMMAND, reg16);

        /* 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 */
int intel_me_extend_valid(struct pci_dev *dev)
{
        struct me_heres status;
        uint32_t extend[8] = {0};
        int i, count = 0;

        pci_read_dword_ptr(dev, &status, PCI_ME_HERES);
        if (!status.extend_feature_present) {
                printf("ME: Extend Feature not present\n");
                return -1;
        }

        if (!status.extend_reg_valid) {
                printf("ME: Extend Register not valid\n");
                return -1;
        }

        switch (status.extend_reg_algorithm) {
        case PCI_ME_EXT_SHA1:
                count = 5;
                printf("ME: Extend SHA-1: ");
                break;
        case PCI_ME_EXT_SHA256:
                count = 8;
                printf("ME: Extend SHA-256: ");
                break;
        default:
                printf("ME: Extend Algorithm %d unknown\n",
                       status.extend_reg_algorithm);
                return -1;
        }

        for (i = 0; i < count; ++i) {
                extend[i] = pci_read_long(dev, PCI_ME_HER(i));
                printf("%08x", extend[i]);
        }
        printf("\n");

        return 0;
}