2005-04-16 16:20:36 -06:00
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/dmi.h>
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#include <linux/bootmem.h>
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2005-06-25 15:54:47 -06:00
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struct dmi_header {
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u8 type;
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u8 length;
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u16 handle;
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2005-04-16 16:20:36 -06:00
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};
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#undef DMI_DEBUG
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#ifdef DMI_DEBUG
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#define dmi_printk(x) printk x
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#else
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#define dmi_printk(x)
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#endif
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static char * __init dmi_string(struct dmi_header *dm, u8 s)
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{
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2005-06-25 15:54:47 -06:00
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u8 *bp = ((u8 *) dm) + dm->length;
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if (!s)
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2005-04-16 16:20:36 -06:00
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return "";
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s--;
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2005-06-25 15:54:47 -06:00
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while (s > 0 && *bp) {
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bp += strlen(bp) + 1;
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2005-04-16 16:20:36 -06:00
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s--;
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}
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return bp;
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}
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/*
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* We have to be cautious here. We have seen BIOSes with DMI pointers
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* pointing to completely the wrong place for example
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*/
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2005-06-25 15:54:47 -06:00
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static int __init dmi_table(u32 base, int len, int num,
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void (*decode)(struct dmi_header *))
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2005-04-16 16:20:36 -06:00
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{
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2005-06-25 15:54:47 -06:00
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u8 *buf, *data;
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int i = 0;
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2005-04-16 16:20:36 -06:00
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buf = bt_ioremap(base, len);
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2005-06-25 15:54:47 -06:00
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if (buf == NULL)
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2005-04-16 16:20:36 -06:00
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return -1;
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data = buf;
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/*
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* Stop when we see all the items the table claimed to have
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* OR we run off the end of the table (also happens)
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*/
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2005-06-25 15:54:47 -06:00
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while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
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struct dmi_header *dm = (struct dmi_header *)data;
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2005-04-16 16:20:36 -06:00
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/*
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* We want to know the total length (formated area and strings)
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* before decoding to make sure we won't run off the table in
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* dmi_decode or dmi_string
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*/
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2005-06-25 15:54:47 -06:00
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data += dm->length;
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while ((data - buf < len - 1) && (data[0] || data[1]))
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data++;
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2005-06-25 15:54:47 -06:00
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if (data - buf < len - 1)
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decode(dm);
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2005-06-25 15:54:47 -06:00
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data += 2;
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2005-04-16 16:20:36 -06:00
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i++;
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}
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bt_iounmap(buf, len);
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return 0;
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}
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2005-06-25 15:54:47 -06:00
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static int __init dmi_checksum(u8 *buf)
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2005-04-16 16:20:36 -06:00
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{
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2005-06-25 15:54:47 -06:00
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u8 sum = 0;
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2005-04-16 16:20:36 -06:00
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int a;
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2005-06-25 15:54:47 -06:00
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for (a = 0; a < 15; a++)
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sum += buf[a];
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return sum == 0;
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2005-04-16 16:20:36 -06:00
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}
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static int __init dmi_iterate(void (*decode)(struct dmi_header *))
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{
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u8 buf[15];
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char __iomem *p, *q;
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/*
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* no iounmap() for that ioremap(); it would be a no-op, but it's
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* so early in setup that sucker gets confused into doing what
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* it shouldn't if we actually call it.
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*/
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p = ioremap(0xF0000, 0x10000);
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if (p == NULL)
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return -1;
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2005-06-25 15:54:47 -06:00
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2005-04-16 16:20:36 -06:00
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for (q = p; q < p + 0x10000; q += 16) {
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memcpy_fromio(buf, q, 15);
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2005-06-25 15:54:47 -06:00
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if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
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u16 num = (buf[13] << 8) | buf[12];
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u16 len = (buf[7] << 8) | buf[6];
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u32 base = (buf[11] << 24) | (buf[10] << 16) |
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(buf[9] << 8) | buf[8];
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2005-04-16 16:20:36 -06:00
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/*
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* DMI version 0.0 means that the real version is taken from
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* the SMBIOS version, which we don't know at this point.
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*/
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2005-06-25 15:54:47 -06:00
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if (buf[14] != 0)
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printk(KERN_INFO "DMI %d.%d present.\n",
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buf[14] >> 4, buf[14] & 0xF);
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2005-04-16 16:20:36 -06:00
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else
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printk(KERN_INFO "DMI present.\n");
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2005-06-25 15:54:47 -06:00
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2005-04-16 16:20:36 -06:00
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dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n",
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num, len));
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2005-06-25 15:54:47 -06:00
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dmi_printk((KERN_INFO "DMI table at 0x%08X.\n", base));
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if (dmi_table(base,len, num, decode) == 0)
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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}
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return -1;
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}
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static char *dmi_ident[DMI_STRING_MAX];
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/*
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* Save a DMI string
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*/
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static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
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{
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char *d = (char*)dm;
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char *p = dmi_string(dm, d[string]);
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2005-06-25 15:54:47 -06:00
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if (p == NULL || *p == 0)
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2005-04-16 16:20:36 -06:00
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return;
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if (dmi_ident[slot])
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return;
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2005-06-25 15:54:47 -06:00
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dmi_ident[slot] = alloc_bootmem(strlen(p) + 1);
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2005-04-16 16:20:36 -06:00
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if(dmi_ident[slot])
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strcpy(dmi_ident[slot], p);
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else
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printk(KERN_ERR "dmi_save_ident: out of memory.\n");
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}
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/*
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* Process a DMI table entry. Right now all we care about are the BIOS
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* and machine entries. For 2.5 we should pull the smbus controller info
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* out of here.
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*/
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static void __init dmi_decode(struct dmi_header *dm)
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{
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2005-06-25 15:54:47 -06:00
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u8 *data __attribute__((__unused__)) = (u8 *)dm;
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2005-04-16 16:20:36 -06:00
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2005-06-25 15:54:47 -06:00
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switch(dm->type) {
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case 0:
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dmi_printk(("BIOS Vendor: %s\n", dmi_string(dm, data[4])));
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dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
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dmi_printk(("BIOS Version: %s\n", dmi_string(dm, data[5])));
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dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
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dmi_printk(("BIOS Release: %s\n", dmi_string(dm, data[8])));
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dmi_save_ident(dm, DMI_BIOS_DATE, 8);
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break;
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case 1:
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dmi_printk(("System Vendor: %s\n", dmi_string(dm, data[4])));
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dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
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dmi_printk(("Product Name: %s\n", dmi_string(dm, data[5])));
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dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
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dmi_printk(("Version: %s\n", dmi_string(dm, data[6])));
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dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
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dmi_printk(("Serial Number: %s\n", dmi_string(dm, data[7])));
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dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
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break;
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case 2:
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dmi_printk(("Board Vendor: %s\n", dmi_string(dm, data[4])));
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dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
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dmi_printk(("Board Name: %s\n", dmi_string(dm, data[5])));
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dmi_save_ident(dm, DMI_BOARD_NAME, 5);
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dmi_printk(("Board Version: %s\n", dmi_string(dm, data[6])));
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dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
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break;
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2005-04-16 16:20:36 -06:00
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}
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}
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void __init dmi_scan_machine(void)
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{
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2005-06-25 15:54:46 -06:00
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if (dmi_iterate(dmi_decode))
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2005-04-16 16:20:36 -06:00
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printk(KERN_INFO "DMI not present.\n");
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}
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/**
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* dmi_check_system - check system DMI data
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* @list: array of dmi_system_id structures to match against
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*
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* Walk the blacklist table running matching functions until someone
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* returns non zero or we hit the end. Callback function is called for
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* each successfull match. Returns the number of matches.
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*/
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int dmi_check_system(struct dmi_system_id *list)
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{
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int i, count = 0;
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struct dmi_system_id *d = list;
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while (d->ident) {
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for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
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int s = d->matches[i].slot;
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if (s == DMI_NONE)
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continue;
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if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
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continue;
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/* No match */
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goto fail;
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}
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if (d->callback && d->callback(d))
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break;
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count++;
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fail: d++;
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}
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return count;
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}
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EXPORT_SYMBOL(dmi_check_system);
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/**
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* dmi_get_system_info - return DMI data value
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* @field: data index (see enum dmi_filed)
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*
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* Returns one DMI data value, can be used to perform
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* complex DMI data checks.
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*/
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2005-06-25 15:54:25 -06:00
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char *dmi_get_system_info(int field)
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{
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return dmi_ident[field];
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}
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2005-06-25 15:54:25 -06:00
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EXPORT_SYMBOL(dmi_get_system_info);
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