diff options
author | Jean Delvare <khali@linux-fr.org> | 2007-11-03 16:29:20 (GMT) |
---|---|---|
committer | Mark M. Hoffman <mhoffman@lightlink.com> | 2008-02-08 01:39:40 (GMT) |
commit | 7fce084a0b3e2bb8caef919f8f36065953655bb5 (patch) | |
tree | a5bf95b6321ec488dc8a0667b652bb50479a32da /drivers | |
parent | df922075f2a55b1ae71a6fe589c1cc1b91381f4f (diff) | |
download | linux-7fce084a0b3e2bb8caef919f8f36065953655bb5.tar.xz |
dmi: Let drivers walk the DMI table
Let drivers walk the DMI table for their own needs. Some drivers need
data stored in OEM-specific DMI records for proper operation.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/firmware/dmi_scan.c | 62 |
1 files changed, 48 insertions, 14 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index e0bade7..1412d7b 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -43,18 +43,12 @@ static char * __init dmi_string(const struct dmi_header *dm, u8 s) * We have to be cautious here. We have seen BIOSes with DMI pointers * pointing to completely the wrong place for example */ -static int __init dmi_table(u32 base, int len, int num, - void (*decode)(const struct dmi_header *)) +static void dmi_table(u8 *buf, int len, int num, + void (*decode)(const struct dmi_header *)) { - u8 *buf, *data; + u8 *data = buf; int i = 0; - buf = dmi_ioremap(base, len); - if (buf == NULL) - return -1; - - data = buf; - /* * Stop when we see all the items the table claimed to have * OR we run off the end of the table (also happens) @@ -75,7 +69,23 @@ static int __init dmi_table(u32 base, int len, int num, data += 2; i++; } - dmi_iounmap(buf, len); +} + +static u32 dmi_base; +static u16 dmi_len; +static u16 dmi_num; + +static int __init dmi_walk_early(void (*decode)(const struct dmi_header *)) +{ + u8 *buf; + + buf = dmi_ioremap(dmi_base, dmi_len); + if (buf == NULL) + return -1; + + dmi_table(buf, dmi_len, dmi_num, decode); + + dmi_iounmap(buf, dmi_len); return 0; } @@ -291,9 +301,9 @@ static int __init dmi_present(const char __iomem *p) memcpy_fromio(buf, p, 15); if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) { - u16 num = (buf[13] << 8) | buf[12]; - u16 len = (buf[7] << 8) | buf[6]; - u32 base = (buf[11] << 24) | (buf[10] << 16) | + dmi_num = (buf[13] << 8) | buf[12]; + dmi_len = (buf[7] << 8) | buf[6]; + dmi_base = (buf[11] << 24) | (buf[10] << 16) | (buf[9] << 8) | buf[8]; /* @@ -305,7 +315,7 @@ static int __init dmi_present(const char __iomem *p) buf[14] >> 4, buf[14] & 0xF); else printk(KERN_INFO "DMI present.\n"); - if (dmi_table(base,len, num, dmi_decode) == 0) + if (dmi_walk_early(dmi_decode) == 0) return 0; } return 1; @@ -489,3 +499,27 @@ int dmi_get_year(int field) return year; } + +/** + * dmi_walk - Walk the DMI table and get called back for every record + * @decode: Callback function + * + * Returns -1 when the DMI table can't be reached, 0 on success. + */ +int dmi_walk(void (*decode)(const struct dmi_header *)) +{ + u8 *buf; + + if (!dmi_available) + return -1; + + buf = ioremap(dmi_base, dmi_len); + if (buf == NULL) + return -1; + + dmi_table(buf, dmi_len, dmi_num, decode); + + iounmap(buf); + return 0; +} +EXPORT_SYMBOL_GPL(dmi_walk); |