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![Simon Glass](/assets/img/avatar_default.png)
When U-Boot is booted from coreboot the SMBIOS tables are written by coreboot, not U-Boot. The existing method of updating the BIOS version string does not work in that case, since gd->smbios_version is only set when U-Boot writes the tables. Add a new function which allows the version to be updated by parsing the tables and writing the string in the correct place. Since coreboot provides a pointer to the SMBIOS tables in its sysinfo structure, this makes it easy to do the update. Signed-off-by: Simon Glass <sjg@chromium.org>
515 lines
13 KiB
C
515 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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*
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* Adapted from coreboot src/arch/x86/smbios.c
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*/
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#include <common.h>
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#include <dm.h>
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#include <env.h>
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#include <mapmem.h>
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#include <smbios.h>
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#include <sysinfo.h>
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#include <tables_csum.h>
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#include <version.h>
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#ifdef CONFIG_CPU
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#include <cpu.h>
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#include <dm/uclass-internal.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* struct smbios_ctx - context for writing SMBIOS tables
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*
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* @node: node containing the information to write (ofnode_null() if none)
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* @dev: sysinfo device to use (NULL if none)
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* @eos: end-of-string pointer for the table being processed. This is set
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* up when we start processing a table
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* @next_ptr: pointer to the start of the next string to be added. When the
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* table is nopt empty, this points to the byte after the \0 of the
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* previous string.
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* @last_str: points to the last string that was written to the table, or NULL
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* if none
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*/
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struct smbios_ctx {
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ofnode node;
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struct udevice *dev;
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char *eos;
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char *next_ptr;
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char *last_str;
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};
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/**
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* Function prototype to write a specific type of SMBIOS structure
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*
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* @addr: start address to write the structure
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* @handle: the structure's handle, a unique 16-bit number
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* @ctx: context for writing the tables
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* @return: size of the structure
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*/
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typedef int (*smbios_write_type)(ulong *addr, int handle,
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struct smbios_ctx *ctx);
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/**
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* struct smbios_write_method - Information about a table-writing function
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*
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* @write: Function to call
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* @subnode_name: Name of subnode which has the information for this function,
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* NULL if none
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*/
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struct smbios_write_method {
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smbios_write_type write;
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const char *subnode_name;
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};
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/**
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* smbios_add_string() - add a string to the string area
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*
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* This adds a string to the string area which is appended directly after
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* the formatted portion of an SMBIOS structure.
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*
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* @ctx: SMBIOS context
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* @str: string to add
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* @return: string number in the string area (1 or more)
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*/
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static int smbios_add_string(struct smbios_ctx *ctx, const char *str)
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{
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int i = 1;
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char *p = ctx->eos;
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if (!*str)
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str = "Unknown";
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for (;;) {
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if (!*p) {
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ctx->last_str = p;
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strcpy(p, str);
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p += strlen(str);
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*p++ = '\0';
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ctx->next_ptr = p;
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*p++ = '\0';
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return i;
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}
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if (!strcmp(p, str)) {
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ctx->last_str = p;
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return i;
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}
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p += strlen(p) + 1;
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i++;
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}
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}
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/**
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* smbios_add_prop_si() - Add a property from the devicetree or sysinfo
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*
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* Sysinfo is used if available, with a fallback to devicetree
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*
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* @ctx: context for writing the tables
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* @prop: property to write
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* @return 0 if not found, else SMBIOS string number (1 or more)
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*/
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static int smbios_add_prop_si(struct smbios_ctx *ctx, const char *prop,
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int sysinfo_id)
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{
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if (sysinfo_id && ctx->dev) {
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char val[SMBIOS_STR_MAX];
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int ret;
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ret = sysinfo_get_str(ctx->dev, sysinfo_id, sizeof(val), val);
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if (!ret)
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return smbios_add_string(ctx, val);
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}
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if (IS_ENABLED(CONFIG_OF_CONTROL)) {
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const char *str;
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str = ofnode_read_string(ctx->node, prop);
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if (str)
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return smbios_add_string(ctx, str);
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}
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return 0;
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}
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/**
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* smbios_add_prop() - Add a property from the devicetree
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*
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* @prop: property to write
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* @return 0 if not found, else SMBIOS string number (1 or more)
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*/
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static int smbios_add_prop(struct smbios_ctx *ctx, const char *prop)
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{
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return smbios_add_prop_si(ctx, prop, SYSINFO_ID_NONE);
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}
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static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
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{
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ctx->eos = eos;
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ctx->next_ptr = eos;
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ctx->last_str = NULL;
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}
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int smbios_update_version(const char *version)
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{
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char *ptr = gd->smbios_version;
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uint old_len, len;
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if (!ptr)
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return log_ret(-ENOENT);
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/*
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* This string is supposed to have at least enough bytes and is
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* padded with spaces. Update it, taking care not to move the
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* \0 terminator, so that other strings in the string table
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* are not disturbed. See smbios_add_string()
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*/
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old_len = strnlen(ptr, SMBIOS_STR_MAX);
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len = strnlen(version, SMBIOS_STR_MAX);
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if (len > old_len)
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return log_ret(-ENOSPC);
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log_debug("Replacing SMBIOS type 0 version string '%s'\n", ptr);
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memcpy(ptr, version, len);
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#ifdef LOG_DEBUG
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print_buffer((ulong)ptr, ptr, 1, old_len + 1, 0);
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#endif
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return 0;
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}
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/**
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* smbios_string_table_len() - compute the string area size
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*
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* This computes the size of the string area including the string terminator.
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*
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* @ctx: SMBIOS context
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* @return: string area size
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*/
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static int smbios_string_table_len(const struct smbios_ctx *ctx)
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{
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/* Allow for the final \0 after all strings */
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return (ctx->next_ptr + 1) - ctx->eos;
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}
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static int smbios_write_type0(ulong *current, int handle,
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struct smbios_ctx *ctx)
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{
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struct smbios_type0 *t;
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int len = sizeof(struct smbios_type0);
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t = map_sysmem(*current, len);
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memset(t, 0, sizeof(struct smbios_type0));
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fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
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smbios_set_eos(ctx, t->eos);
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t->vendor = smbios_add_string(ctx, "U-Boot");
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t->bios_ver = smbios_add_prop(ctx, "version");
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if (!t->bios_ver)
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t->bios_ver = smbios_add_string(ctx, PLAIN_VERSION);
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if (t->bios_ver)
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gd->smbios_version = ctx->last_str;
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log_debug("smbios_version = %p: '%s'\n", gd->smbios_version,
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gd->smbios_version);
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#ifdef LOG_DEBUG
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print_buffer((ulong)gd->smbios_version, gd->smbios_version,
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1, strlen(gd->smbios_version) + 1, 0);
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#endif
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t->bios_release_date = smbios_add_string(ctx, U_BOOT_DMI_DATE);
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#ifdef CONFIG_ROM_SIZE
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t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
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#endif
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t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
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BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
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BIOS_CHARACTERISTICS_UPGRADEABLE;
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#ifdef CONFIG_GENERATE_ACPI_TABLE
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t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
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#endif
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#ifdef CONFIG_EFI_LOADER
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t->bios_characteristics_ext1 |= BIOS_CHARACTERISTICS_EXT1_UEFI;
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#endif
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t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
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/* bios_major_release has only one byte, so drop century */
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t->bios_major_release = U_BOOT_VERSION_NUM % 100;
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t->bios_minor_release = U_BOOT_VERSION_NUM_PATCH;
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t->ec_major_release = 0xff;
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t->ec_minor_release = 0xff;
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len = t->length + smbios_string_table_len(ctx);
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*current += len;
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unmap_sysmem(t);
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return len;
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}
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static int smbios_write_type1(ulong *current, int handle,
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struct smbios_ctx *ctx)
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{
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struct smbios_type1 *t;
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int len = sizeof(struct smbios_type1);
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char *serial_str = env_get("serial#");
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t = map_sysmem(*current, len);
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memset(t, 0, sizeof(struct smbios_type1));
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fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
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smbios_set_eos(ctx, t->eos);
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t->manufacturer = smbios_add_prop(ctx, "manufacturer");
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t->product_name = smbios_add_prop(ctx, "product");
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t->version = smbios_add_prop_si(ctx, "version",
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SYSINFO_ID_SMBIOS_SYSTEM_VERSION);
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if (serial_str) {
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t->serial_number = smbios_add_string(ctx, serial_str);
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strncpy((char *)t->uuid, serial_str, sizeof(t->uuid));
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} else {
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t->serial_number = smbios_add_prop(ctx, "serial");
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}
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t->sku_number = smbios_add_prop(ctx, "sku");
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t->family = smbios_add_prop(ctx, "family");
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len = t->length + smbios_string_table_len(ctx);
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*current += len;
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unmap_sysmem(t);
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return len;
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}
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static int smbios_write_type2(ulong *current, int handle,
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struct smbios_ctx *ctx)
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{
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struct smbios_type2 *t;
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int len = sizeof(struct smbios_type2);
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t = map_sysmem(*current, len);
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memset(t, 0, sizeof(struct smbios_type2));
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fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
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smbios_set_eos(ctx, t->eos);
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t->manufacturer = smbios_add_prop(ctx, "manufacturer");
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t->product_name = smbios_add_prop(ctx, "product");
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t->version = smbios_add_prop_si(ctx, "version",
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SYSINFO_ID_SMBIOS_BASEBOARD_VERSION);
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t->asset_tag_number = smbios_add_prop(ctx, "asset-tag");
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t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
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t->board_type = SMBIOS_BOARD_MOTHERBOARD;
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len = t->length + smbios_string_table_len(ctx);
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*current += len;
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unmap_sysmem(t);
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return len;
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}
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static int smbios_write_type3(ulong *current, int handle,
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struct smbios_ctx *ctx)
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{
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struct smbios_type3 *t;
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int len = sizeof(struct smbios_type3);
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t = map_sysmem(*current, len);
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memset(t, 0, sizeof(struct smbios_type3));
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fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
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smbios_set_eos(ctx, t->eos);
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t->manufacturer = smbios_add_prop(ctx, "manufacturer");
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t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
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t->bootup_state = SMBIOS_STATE_SAFE;
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t->power_supply_state = SMBIOS_STATE_SAFE;
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t->thermal_state = SMBIOS_STATE_SAFE;
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t->security_status = SMBIOS_SECURITY_NONE;
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len = t->length + smbios_string_table_len(ctx);
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*current += len;
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unmap_sysmem(t);
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return len;
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}
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static void smbios_write_type4_dm(struct smbios_type4 *t,
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struct smbios_ctx *ctx)
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{
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u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
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const char *vendor = "Unknown";
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const char *name = "Unknown";
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#ifdef CONFIG_CPU
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char processor_name[49];
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char vendor_name[49];
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struct udevice *cpu = NULL;
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uclass_find_first_device(UCLASS_CPU, &cpu);
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if (cpu) {
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struct cpu_plat *plat = dev_get_parent_plat(cpu);
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if (plat->family)
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processor_family = plat->family;
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t->processor_id[0] = plat->id[0];
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t->processor_id[1] = plat->id[1];
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if (!cpu_get_vendor(cpu, vendor_name, sizeof(vendor_name)))
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vendor = vendor_name;
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if (!cpu_get_desc(cpu, processor_name, sizeof(processor_name)))
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name = processor_name;
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}
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#endif
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t->processor_family = processor_family;
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t->processor_manufacturer = smbios_add_string(ctx, vendor);
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t->processor_version = smbios_add_string(ctx, name);
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}
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static int smbios_write_type4(ulong *current, int handle,
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struct smbios_ctx *ctx)
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{
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struct smbios_type4 *t;
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int len = sizeof(struct smbios_type4);
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t = map_sysmem(*current, len);
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memset(t, 0, sizeof(struct smbios_type4));
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fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
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smbios_set_eos(ctx, t->eos);
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t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
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smbios_write_type4_dm(t, ctx);
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t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
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t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
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t->l1_cache_handle = 0xffff;
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t->l2_cache_handle = 0xffff;
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t->l3_cache_handle = 0xffff;
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t->processor_family2 = t->processor_family;
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len = t->length + smbios_string_table_len(ctx);
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*current += len;
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unmap_sysmem(t);
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return len;
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}
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static int smbios_write_type32(ulong *current, int handle,
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struct smbios_ctx *ctx)
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{
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struct smbios_type32 *t;
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int len = sizeof(struct smbios_type32);
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t = map_sysmem(*current, len);
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memset(t, 0, sizeof(struct smbios_type32));
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fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
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smbios_set_eos(ctx, t->eos);
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*current += len;
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unmap_sysmem(t);
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return len;
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}
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static int smbios_write_type127(ulong *current, int handle,
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struct smbios_ctx *ctx)
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{
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struct smbios_type127 *t;
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int len = sizeof(struct smbios_type127);
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t = map_sysmem(*current, len);
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memset(t, 0, sizeof(struct smbios_type127));
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fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
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*current += len;
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unmap_sysmem(t);
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return len;
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}
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static struct smbios_write_method smbios_write_funcs[] = {
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{ smbios_write_type0, "bios", },
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{ smbios_write_type1, "system", },
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{ smbios_write_type2, "baseboard", },
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{ smbios_write_type3, "chassis", },
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{ smbios_write_type4, },
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{ smbios_write_type32, },
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{ smbios_write_type127 },
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};
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ulong write_smbios_table(ulong addr)
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{
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ofnode parent_node = ofnode_null();
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struct smbios_entry *se;
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struct smbios_ctx ctx;
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ulong table_addr;
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ulong tables;
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int len = 0;
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int max_struct_size = 0;
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int handle = 0;
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char *istart;
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int isize;
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int i;
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ctx.node = ofnode_null();
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if (IS_ENABLED(CONFIG_OF_CONTROL)) {
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uclass_first_device(UCLASS_SYSINFO, &ctx.dev);
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if (ctx.dev)
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parent_node = dev_read_subnode(ctx.dev, "smbios");
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} else {
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ctx.dev = NULL;
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}
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/* 16 byte align the table address */
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addr = ALIGN(addr, 16);
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se = map_sysmem(addr, sizeof(struct smbios_entry));
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memset(se, 0, sizeof(struct smbios_entry));
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addr += sizeof(struct smbios_entry);
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addr = ALIGN(addr, 16);
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tables = addr;
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/* populate minimum required tables */
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for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
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const struct smbios_write_method *method;
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int tmp;
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method = &smbios_write_funcs[i];
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if (IS_ENABLED(CONFIG_OF_CONTROL) && method->subnode_name)
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ctx.node = ofnode_find_subnode(parent_node,
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method->subnode_name);
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tmp = method->write((ulong *)&addr, handle++, &ctx);
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max_struct_size = max(max_struct_size, tmp);
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len += tmp;
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}
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memcpy(se->anchor, "_SM_", 4);
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se->length = sizeof(struct smbios_entry);
|
|
se->major_ver = SMBIOS_MAJOR_VER;
|
|
se->minor_ver = SMBIOS_MINOR_VER;
|
|
se->max_struct_size = max_struct_size;
|
|
memcpy(se->intermediate_anchor, "_DMI_", 5);
|
|
se->struct_table_length = len;
|
|
|
|
/*
|
|
* We must use a pointer here so things work correctly on sandbox. The
|
|
* user of this table is not aware of the mapping of addresses to
|
|
* sandbox's DRAM buffer.
|
|
*/
|
|
table_addr = (ulong)map_sysmem(tables, 0);
|
|
if (sizeof(table_addr) > sizeof(u32) && table_addr > (ulong)UINT_MAX) {
|
|
/*
|
|
* We need to put this >32-bit pointer into the table but the
|
|
* field is only 32 bits wide.
|
|
*/
|
|
printf("WARNING: SMBIOS table_address overflow %llx\n",
|
|
(unsigned long long)table_addr);
|
|
table_addr = 0;
|
|
}
|
|
se->struct_table_address = table_addr;
|
|
|
|
se->struct_count = handle;
|
|
|
|
/* calculate checksums */
|
|
istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
|
|
isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
|
|
se->intermediate_checksum = table_compute_checksum(istart, isize);
|
|
se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
|
|
unmap_sysmem(se);
|
|
|
|
return addr;
|
|
}
|