ipmi: Create a platform device for a DMI-specified IPMI interface
Create a platform device for each IPMI device in the DMI table, a separate kind of device for SSIF types and for KCS, BT, and SMIC types. This is so auto-loading IPMI devices will work from just SMBIOS tables. This also adds the ability to extract the slave address from the SMBIOS tables, so that when the driver uses ACPI-specified interfaces, it can still extract the slave address from SMBIOS. Signed-off-by: Corey Minyard <cminyard@mvista.com> Cc: Andy Lutomirski <luto@kernel.org>
This commit is contained in:
Corey Minyard
Родитель
cdea46566b
Коммит
9f88145f18
|
|
@ -5,6 +5,7 @@
|
|||
menuconfig IPMI_HANDLER
|
||||
tristate 'IPMI top-level message handler'
|
||||
depends on HAS_IOMEM
|
||||
select IPMI_DMI_DECODE if DMI
|
||||
help
|
||||
This enables the central IPMI message handler, required for IPMI
|
||||
to work.
|
||||
|
|
@ -16,6 +17,9 @@ menuconfig IPMI_HANDLER
|
|||
|
||||
If unsure, say N.
|
||||
|
||||
config IPMI_DMI_DECODE
|
||||
bool
|
||||
|
||||
if IPMI_HANDLER
|
||||
|
||||
config IPMI_PANIC_EVENT
|
||||
|
|
|
|||
|
|
@ -7,6 +7,7 @@ ipmi_si-y := ipmi_si_intf.o ipmi_kcs_sm.o ipmi_smic_sm.o ipmi_bt_sm.o
|
|||
obj-$(CONFIG_IPMI_HANDLER) += ipmi_msghandler.o
|
||||
obj-$(CONFIG_IPMI_DEVICE_INTERFACE) += ipmi_devintf.o
|
||||
obj-$(CONFIG_IPMI_SI) += ipmi_si.o
|
||||
obj-$(CONFIG_IPMI_DMI_DECODE) += ipmi_dmi.o
|
||||
obj-$(CONFIG_IPMI_SSIF) += ipmi_ssif.o
|
||||
obj-$(CONFIG_IPMI_POWERNV) += ipmi_powernv.o
|
||||
obj-$(CONFIG_IPMI_WATCHDOG) += ipmi_watchdog.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,273 @@
|
|||
/*
|
||||
* A hack to create a platform device from a DMI entry. This will
|
||||
* allow autoloading of the IPMI drive based on SMBIOS entries.
|
||||
*/
|
||||
|
||||
#include <linux/ipmi.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/dmi.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/property.h>
|
||||
#include "ipmi_dmi.h"
|
||||
|
||||
struct ipmi_dmi_info {
|
||||
int type;
|
||||
u32 flags;
|
||||
unsigned long addr;
|
||||
u8 slave_addr;
|
||||
struct ipmi_dmi_info *next;
|
||||
};
|
||||
|
||||
static struct ipmi_dmi_info *ipmi_dmi_infos;
|
||||
|
||||
static int ipmi_dmi_nr __initdata;
|
||||
|
||||
static void __init dmi_add_platform_ipmi(unsigned long base_addr,
|
||||
u32 flags,
|
||||
u8 slave_addr,
|
||||
int irq,
|
||||
int offset,
|
||||
int type)
|
||||
{
|
||||
struct platform_device *pdev;
|
||||
struct resource r[4];
|
||||
unsigned int num_r = 1, size;
|
||||
struct property_entry p[4] = {
|
||||
PROPERTY_ENTRY_U8("slave-addr", slave_addr),
|
||||
PROPERTY_ENTRY_U8("ipmi-type", type),
|
||||
PROPERTY_ENTRY_U16("i2c-addr", base_addr),
|
||||
{ }
|
||||
};
|
||||
char *name, *override;
|
||||
int rv;
|
||||
struct ipmi_dmi_info *info;
|
||||
|
||||
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
||||
if (!info) {
|
||||
pr_warn("ipmi:dmi: Could not allocate dmi info\n");
|
||||
} else {
|
||||
info->type = type;
|
||||
info->flags = flags;
|
||||
info->addr = base_addr;
|
||||
info->slave_addr = slave_addr;
|
||||
info->next = ipmi_dmi_infos;
|
||||
ipmi_dmi_infos = info;
|
||||
}
|
||||
|
||||
name = "dmi-ipmi-si";
|
||||
override = "ipmi_si";
|
||||
switch (type) {
|
||||
case IPMI_DMI_TYPE_SSIF:
|
||||
name = "dmi-ipmi-ssif";
|
||||
override = "ipmi_ssif";
|
||||
offset = 1;
|
||||
size = 1;
|
||||
break;
|
||||
case IPMI_DMI_TYPE_BT:
|
||||
size = 3;
|
||||
break;
|
||||
case IPMI_DMI_TYPE_KCS:
|
||||
case IPMI_DMI_TYPE_SMIC:
|
||||
size = 2;
|
||||
break;
|
||||
default:
|
||||
pr_err("ipmi:dmi: Invalid IPMI type: %d", type);
|
||||
return;
|
||||
}
|
||||
|
||||
pdev = platform_device_alloc(name, ipmi_dmi_nr);
|
||||
if (!pdev) {
|
||||
pr_err("ipmi:dmi: Error allocation IPMI platform device");
|
||||
return;
|
||||
}
|
||||
pdev->driver_override = override;
|
||||
|
||||
if (type == IPMI_DMI_TYPE_SSIF)
|
||||
goto add_properties;
|
||||
|
||||
memset(r, 0, sizeof(r));
|
||||
|
||||
r[0].start = base_addr;
|
||||
r[0].end = r[0].start + offset - 1;
|
||||
r[0].name = "IPMI Address 1";
|
||||
r[0].flags = flags;
|
||||
|
||||
if (size > 1) {
|
||||
r[1].start = r[0].start + offset;
|
||||
r[1].end = r[1].start + offset - 1;
|
||||
r[1].name = "IPMI Address 2";
|
||||
r[1].flags = flags;
|
||||
num_r++;
|
||||
}
|
||||
|
||||
if (size > 2) {
|
||||
r[2].start = r[1].start + offset;
|
||||
r[2].end = r[2].start + offset - 1;
|
||||
r[2].name = "IPMI Address 3";
|
||||
r[2].flags = flags;
|
||||
num_r++;
|
||||
}
|
||||
|
||||
if (irq) {
|
||||
r[num_r].start = irq;
|
||||
r[num_r].end = irq;
|
||||
r[num_r].name = "IPMI IRQ";
|
||||
r[num_r].flags = IORESOURCE_IRQ;
|
||||
num_r++;
|
||||
}
|
||||
|
||||
rv = platform_device_add_resources(pdev, r, num_r);
|
||||
if (rv) {
|
||||
dev_err(&pdev->dev,
|
||||
"ipmi:dmi: Unable to add resources: %d\n", rv);
|
||||
goto err;
|
||||
}
|
||||
|
||||
add_properties:
|
||||
rv = platform_device_add_properties(pdev, p);
|
||||
if (rv) {
|
||||
dev_err(&pdev->dev,
|
||||
"ipmi:dmi: Unable to add properties: %d\n", rv);
|
||||
goto err;
|
||||
}
|
||||
|
||||
rv = platform_device_add(pdev);
|
||||
if (rv) {
|
||||
dev_err(&pdev->dev, "ipmi:dmi: Unable to add device: %d\n", rv);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ipmi_dmi_nr++;
|
||||
return;
|
||||
|
||||
err:
|
||||
platform_device_put(pdev);
|
||||
}
|
||||
|
||||
/*
|
||||
* Look up the slave address for a given interface. This is here
|
||||
* because ACPI doesn't have a slave address while SMBIOS does, but we
|
||||
* prefer using ACPI so the ACPI code can use the IPMI namespace.
|
||||
* This function allows an ACPI-specified IPMI device to look up the
|
||||
* slave address from the DMI table.
|
||||
*/
|
||||
int ipmi_dmi_get_slave_addr(int type, u32 flags, unsigned long base_addr)
|
||||
{
|
||||
struct ipmi_dmi_info *info = ipmi_dmi_infos;
|
||||
|
||||
while (info) {
|
||||
if (info->type == type &&
|
||||
info->flags == flags &&
|
||||
info->addr == base_addr)
|
||||
return info->slave_addr;
|
||||
info = info->next;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(ipmi_dmi_get_slave_addr);
|
||||
|
||||
#define DMI_IPMI_MIN_LENGTH 0x10
|
||||
#define DMI_IPMI_VER2_LENGTH 0x12
|
||||
#define DMI_IPMI_TYPE 4
|
||||
#define DMI_IPMI_SLAVEADDR 6
|
||||
#define DMI_IPMI_ADDR 8
|
||||
#define DMI_IPMI_ACCESS 0x10
|
||||
#define DMI_IPMI_IRQ 0x11
|
||||
#define DMI_IPMI_IO_MASK 0xfffe
|
||||
|
||||
static void __init dmi_decode_ipmi(const struct dmi_header *dm)
|
||||
{
|
||||
const u8 *data = (const u8 *) dm;
|
||||
u32 flags = IORESOURCE_IO;
|
||||
unsigned long base_addr;
|
||||
u8 len = dm->length;
|
||||
u8 slave_addr;
|
||||
int irq = 0, offset;
|
||||
int type;
|
||||
|
||||
if (len < DMI_IPMI_MIN_LENGTH)
|
||||
return;
|
||||
|
||||
type = data[DMI_IPMI_TYPE];
|
||||
slave_addr = data[DMI_IPMI_SLAVEADDR];
|
||||
|
||||
memcpy(&base_addr, data + DMI_IPMI_ADDR, sizeof(unsigned long));
|
||||
if (len >= DMI_IPMI_VER2_LENGTH) {
|
||||
if (type == IPMI_DMI_TYPE_SSIF) {
|
||||
offset = 0;
|
||||
flags = 0;
|
||||
base_addr = data[DMI_IPMI_ADDR] >> 1;
|
||||
if (base_addr == 0) {
|
||||
/*
|
||||
* Some broken systems put the I2C address in
|
||||
* the slave address field. We try to
|
||||
* accommodate them here.
|
||||
*/
|
||||
base_addr = data[DMI_IPMI_SLAVEADDR] >> 1;
|
||||
slave_addr = 0;
|
||||
}
|
||||
} else {
|
||||
if (base_addr & 1) {
|
||||
/* I/O */
|
||||
base_addr &= DMI_IPMI_IO_MASK;
|
||||
} else {
|
||||
/* Memory */
|
||||
flags = IORESOURCE_MEM;
|
||||
}
|
||||
|
||||
/*
|
||||
* If bit 4 of byte 0x10 is set, then the lsb
|
||||
* for the address is odd.
|
||||
*/
|
||||
base_addr |= (data[DMI_IPMI_ACCESS] >> 4) & 1;
|
||||
|
||||
irq = data[DMI_IPMI_IRQ];
|
||||
|
||||
/*
|
||||
* The top two bits of byte 0x10 hold the
|
||||
* register spacing.
|
||||
*/
|
||||
switch ((data[DMI_IPMI_ACCESS] >> 6) & 3) {
|
||||
case 0: /* Byte boundaries */
|
||||
offset = 1;
|
||||
break;
|
||||
case 1: /* 32-bit boundaries */
|
||||
offset = 4;
|
||||
break;
|
||||
case 2: /* 16-byte boundaries */
|
||||
offset = 16;
|
||||
break;
|
||||
default:
|
||||
pr_err("ipmi:dmi: Invalid offset: 0");
|
||||
return;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/* Old DMI spec. */
|
||||
/*
|
||||
* Note that technically, the lower bit of the base
|
||||
* address should be 1 if the address is I/O and 0 if
|
||||
* the address is in memory. So many systems get that
|
||||
* wrong (and all that I have seen are I/O) so we just
|
||||
* ignore that bit and assume I/O. Systems that use
|
||||
* memory should use the newer spec, anyway.
|
||||
*/
|
||||
base_addr = base_addr & DMI_IPMI_IO_MASK;
|
||||
offset = 1;
|
||||
}
|
||||
|
||||
dmi_add_platform_ipmi(base_addr, flags, slave_addr, irq,
|
||||
offset, type);
|
||||
}
|
||||
|
||||
static int __init scan_for_dmi_ipmi(void)
|
||||
{
|
||||
const struct dmi_device *dev = NULL;
|
||||
|
||||
while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev)))
|
||||
dmi_decode_ipmi((const struct dmi_header *) dev->device_data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
subsys_initcall(scan_for_dmi_ipmi);
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
/*
|
||||
* DMI defines for use by IPMI
|
||||
*/
|
||||
|
||||
#define IPMI_DMI_TYPE_KCS 0x01
|
||||
#define IPMI_DMI_TYPE_SMIC 0x02
|
||||
#define IPMI_DMI_TYPE_BT 0x03
|
||||
#define IPMI_DMI_TYPE_SSIF 0x04
|
||||
|
||||
#ifdef CONFIG_IPMI_DMI_DECODE
|
||||
int ipmi_dmi_get_slave_addr(int type, u32 flags, unsigned long base_addr);
|
||||
#endif
|
||||
Загрузка…
Ссылка в новой задаче