diff options
Diffstat (limited to 'drivers/firmware/dmi_scan.c')
| -rw-r--r-- | drivers/firmware/dmi_scan.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index fa0affb699b4..c7e81ff8f3ef 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -8,6 +8,7 @@ #include <linux/bootmem.h> #include <linux/random.h> #include <asm/dmi.h> +#include <asm/unaligned.h> /* * DMI stands for "Desktop Management Interface". It is part @@ -25,6 +26,13 @@ static int dmi_initialized; /* DMI system identification string used during boot */ static char dmi_ids_string[128] __initdata; +static struct dmi_memdev_info { + const char *device; + const char *bank; + u16 handle; +} *dmi_memdev; +static int dmi_memdev_nr; + static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) { const u8 *bp = ((u8 *) dm) + dm->length; @@ -322,6 +330,42 @@ static void __init dmi_save_extended_devices(const struct dmi_header *dm) dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); } +static void __init count_mem_devices(const struct dmi_header *dm, void *v) +{ + if (dm->type != DMI_ENTRY_MEM_DEVICE) + return; + dmi_memdev_nr++; +} + +static void __init save_mem_devices(const struct dmi_header *dm, void *v) +{ + const char *d = (const char *)dm; + static int nr; + + if (dm->type != DMI_ENTRY_MEM_DEVICE) + return; + if (nr >= dmi_memdev_nr) { + pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n"); + return; + } + dmi_memdev[nr].handle = get_unaligned(&dm->handle); + dmi_memdev[nr].device = dmi_string(dm, d[0x10]); + dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); + nr++; +} + +void __init dmi_memdev_walk(void) +{ + if (!dmi_available) + return; + + if (dmi_walk_early(count_mem_devices) == 0 && dmi_memdev_nr) { + dmi_memdev = dmi_alloc(sizeof(*dmi_memdev) * dmi_memdev_nr); + if (dmi_memdev) + dmi_walk_early(save_mem_devices); + } +} + /* * Process a DMI table entry. Right now all we care about are the BIOS * and machine entries. For 2.5 we should pull the smbus controller info @@ -815,3 +859,20 @@ bool dmi_match(enum dmi_field f, const char *str) return !strcmp(info, str); } EXPORT_SYMBOL_GPL(dmi_match); + +void dmi_memdev_name(u16 handle, const char **bank, const char **device) +{ + int n; + + if (dmi_memdev == NULL) + return; + + for (n = 0; n < dmi_memdev_nr; n++) { + if (handle == dmi_memdev[n].handle) { + *bank = dmi_memdev[n].bank; + *device = dmi_memdev[n].device; + break; + } + } +} +EXPORT_SYMBOL_GPL(dmi_memdev_name); |