Page MenuHomeFreeBSD
Differential D28707 Diff 84049 sys/dev/ipmi/ipmi_smbios.c

Changeset View

Standalone View

View Options

sys/dev/ipmi/ipmi_smbios.c

Show All 33 Lines
#include <sys/bus.h> #include <sys/bus.h>
#include <sys/condvar.h> #include <sys/condvar.h>
#include <sys/eventhandler.h> #include <sys/eventhandler.h>
#include <sys/kernel.h> #include <sys/kernel.h>
#include <sys/selinfo.h> #include <sys/selinfo.h>
#include <vm/vm.h> #include <vm/vm.h>
#include <vm/pmap.h> #include <vm/pmap.h>
#if defined(__amd64__) || defined(__i386__)
#include <machine/pc/bios.h> #include <machine/pc/bios.h>
#endif
#include <dev/smbios/smbios.h>
#ifdef LOCAL_MODULE #ifdef LOCAL_MODULE
#include <ipmi.h> #include <ipmi.h>
#include <ipmivars.h> #include <ipmivars.h>
#else #else
#include <sys/ipmi.h> #include <sys/ipmi.h>
#include <dev/ipmi/ipmivars.h> #include <dev/ipmi/ipmivars.h>
#endif #endif
Show All 28 Lines
typedef void (*smbios_callback_t)(struct smbios_structure_header *, void *); typedef void (*smbios_callback_t)(struct smbios_structure_header *, void *);
static struct ipmi_get_info ipmi_info; static struct ipmi_get_info ipmi_info;
static int ipmi_probed; static int ipmi_probed;
static struct mtx ipmi_info_mtx; static struct mtx ipmi_info_mtx;
MTX_SYSINIT(ipmi_info, &ipmi_info_mtx, "ipmi info", MTX_DEF); MTX_SYSINIT(ipmi_info, &ipmi_info_mtx, "ipmi info", MTX_DEF);
static void ipmi_smbios_probe(struct ipmi_get_info *); static void ipmi_smbios_probe(struct ipmi_get_info *);
static int smbios_cksum(struct smbios_eps *); static void smbios_walk_table(uint8_t *, vm_size_t, smbios_callback_t,
static void smbios_walk_table(uint8_t *, int, smbios_callback_t,
void *); void *);
static void smbios_ipmi_info(struct smbios_structure_header *, void *); static void smbios_ipmi_info(struct smbios_structure_header *, void *);
static void static void
smbios_ipmi_info(struct smbios_structure_header *h, void *arg) smbios_ipmi_info(struct smbios_structure_header *h, void *arg)
{ {
struct ipmi_get_info *info; struct ipmi_get_info *info;
struct ipmi_entry *s; struct ipmi_entry *s;
▲ Show 20 Lines • Show All 42 Lines • ▼ Show 20 Lines if (s->interrupt_number > 15)
s->interrupt_number); s->interrupt_number);
else else
info->irq = s->interrupt_number; info->irq = s->interrupt_number;
} }
info->iface_type = s->interface_type; info->iface_type = s->interface_type;
} }
static void static void
smbios_walk_table(uint8_t *p, int entries, smbios_callback_t cb, void *arg) smbios_walk_table(uint8_t *table, vm_size_t size, smbios_callback_t cb, void *arg)
{ {
struct smbios_structure_header *s; struct smbios_structure_header *s;
uint8_t *p;
while (entries--) { for (p = table; p < table + size;) {
s = (struct smbios_structure_header *)p; s = (struct smbios_structure_header *)p;
cb(s, arg); cb(s, arg);
/* /*
* Look for a double-nul after the end of the * Look for a double-nul after the end of the
* formatted area of this structure. * formatted area of this structure.
*/ */
p += s->length; p += s->length;
while (!(p[0] == 0 && p[1] == 0)) while (!(p[0] == 0 && p[1] == 0)) {
p++; p++;
if (p >= table + size)
return;
}
/* /*
* Skip over the double-nul to the start of the next * Skip over the double-nul to the start of the next
* structure. * structure.
*/ */
p += 2; p += 2;
} }
} }
/* /*
* Walk the SMBIOS table looking for an IPMI (type 38) entry. If we find * Walk the SMBIOS table looking for an IPMI (type 38) entry. If we find
* one, return the parsed data in the passed in ipmi_get_info structure and * one, return the parsed data in the passed in ipmi_get_info structure and
* return true. If we don't find one, return false. * return true. If we don't find one, return false.
*/ */
static void static void
ipmi_smbios_probe(struct ipmi_get_info *info) ipmi_smbios_probe(struct ipmi_get_info *info)
{ {
struct smbios_eps *header;
void *table; void *table;
u_int32_t addr; vm_paddr_t table_paddr;
vm_size_t table_size;
int err;
bzero(info, sizeof(struct ipmi_get_info)); bzero(info, sizeof(struct ipmi_get_info));
/* Find the SMBIOS table header. */ err = smbios_get_structure_table(&table_paddr, &table_size);
addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN, if (err != 0)
SMBIOS_STEP, SMBIOS_OFF);
if (addr == 0)
return; return;
/* table = pmap_mapbios(table_paddr, table_size);
* Map the header. We first map a fixed size to get the actual
* length and then map it a second time with the actual length so
* we can verify the checksum.
*/
header = pmap_mapbios(addr, sizeof(struct smbios_eps));
table = pmap_mapbios(addr, header->length);
pmap_unmapbios((vm_offset_t)header, sizeof(struct smbios_eps));
header = table;
if (smbios_cksum(header) != 0) {
pmap_unmapbios((vm_offset_t)header, header->length);
return;
}
/* Now map the actual table and walk it looking for an IPMI entry. */ smbios_walk_table(table, table_size, smbios_ipmi_info, info);
table = pmap_mapbios(header->structure_table_address,
header->structure_table_length);
smbios_walk_table(table, header->number_structures, smbios_ipmi_info,
info);
/* Unmap everything. */ /* Unmap everything. */
pmap_unmapbios((vm_offset_t)table, header->structure_table_length); pmap_unmapbios((vm_offset_t)table, table_size);
pmap_unmapbios((vm_offset_t)header, header->length);
} }
/* /*
* Return the SMBIOS IPMI table entry info to the caller. If we haven't * Return the SMBIOS IPMI table entry info to the caller. If we haven't
* searched the IPMI table yet, search it. Otherwise, return a cached * searched the IPMI table yet, search it. Otherwise, return a cached
* copy of the data. * copy of the data.
*/ */
int int
Show All 20 Lines default:
/* The cached data is available. */ /* The cached data is available. */
break; break;
} }
bcopy(&ipmi_info, info, sizeof(ipmi_info)); bcopy(&ipmi_info, info, sizeof(ipmi_info));
mtx_unlock(&ipmi_info_mtx); mtx_unlock(&ipmi_info_mtx);
return (info->iface_type != 0); return (info->iface_type != 0);
}
static int
smbios_cksum(struct smbios_eps *e)
{
u_int8_t *ptr;
u_int8_t cksum;
int i;
ptr = (u_int8_t *)e;
cksum = 0;
for (i = 0; i < e->length; i++) {
cksum += ptr[i];
}
return (cksum);
} }