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Some small fixes for IPMI, and one medium sized changed.

Browse Source 
The medium sized change is adding a platform device for IPMI entries
 in the DMI table.  Otherwise there is no auto loading for IPMI
 devices if they are only in the DMI table.
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Merge tag 'for-linus-4.13-v2' of git://github.com/cminyard/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "Some small fixes for IPMI, and one medium sized changed.

  The medium sized change is adding a platform device for IPMI entries
  in the DMI table. Otherwise there is no auto loading for IPMI devices
  if they are only in the DMI table"

* tag 'for-linus-4.13-v2' of git://github.com/cminyard/linux-ipmi:
  ipmi:ssif: Add missing unlock in error branch
  char: ipmi: constify bmc_dev_attr_group and bmc_device_type
  ipmi:ssif: Check dev before setting drvdata
  ipmi: Convert DMI handling over to a platform device
  ipmi: Create a platform device for a DMI-specified IPMI interface
  ipmi: use rcu lock around call to intf->handlers->sender()
  ipmi:ssif: Use i2c_adapter_id instead of adapter->nr
  ipmi: Use the proper default value for register size in ACPI
  ipmi_ssif: remove redundant null check on array client->adapter->name
  ipmi/watchdog: fix watchdog timeout set on reboot
  ipmi_ssif: unlock on allocation failure
This commit is contained in:
Linus Torvalds 2017-07-10 10:59:29 -07:00
commit 9eb7888005
8 changed files with 533 additions and 214 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/char/ipmi/Kconfig
View File

@ -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

1
drivers/char/ipmi/Makefile
View File

@ -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

273
drivers/char/ipmi/ipmi_dmi.c Normal file
View File

@ -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);

12
drivers/char/ipmi/ipmi_dmi.h Normal file
View File

@ -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

9
drivers/char/ipmi/ipmi_msghandler.c
View File

@ -2397,7 +2397,7 @@ static umode_t bmc_dev_attr_is_visible(struct kobject *kobj,
return mode;
}
static struct attribute_group bmc_dev_attr_group = {
static const struct attribute_group bmc_dev_attr_group = {
.attrs = bmc_dev_attrs,
.is_visible = bmc_dev_attr_is_visible,
};
@ -2407,7 +2407,7 @@ static const struct attribute_group *bmc_dev_attr_groups[] = {
NULL
};
static struct device_type bmc_device_type = {
static const struct device_type bmc_device_type = {
.groups = bmc_dev_attr_groups,
};
@ -3878,6 +3878,9 @@ static void smi_recv_tasklet(unsigned long val)
* because the lower layer is allowed to hold locks while calling
* message delivery.
*/
rcu_read_lock();
if (!run_to_completion)
spin_lock_irqsave(&intf->xmit_msgs_lock, flags);
if (intf->curr_msg == NULL && !intf->in_shutdown) {
@ -3900,6 +3903,8 @@ static void smi_recv_tasklet(unsigned long val)
if (newmsg)
intf->handlers->sender(intf->send_info, newmsg);
rcu_read_unlock();
handle_new_recv_msgs(intf);
}

265
drivers/char/ipmi/ipmi_si_intf.c
View File

@ -61,6 +61,7 @@
#include <linux/ipmi_smi.h>
#include <asm/io.h>
#include "ipmi_si_sm.h"
#include "ipmi_dmi.h"
#include <linux/dmi.h>
#include <linux/string.h>
#include <linux/ctype.h>
@ -1942,7 +1943,7 @@ static int hotmod_handler(const char *val, struct kernel_param *kp)
info->io.regspacing = DEFAULT_REGSPACING;
info->io.regsize = regsize;
if (!info->io.regsize)
info->io.regsize = DEFAULT_REGSPACING;
info->io.regsize = DEFAULT_REGSIZE;
info->io.regshift = regshift;
info->irq = irq;
if (info->irq)
@ -2036,7 +2037,7 @@ static int hardcode_find_bmc(void)
info->io.regspacing = DEFAULT_REGSPACING;
info->io.regsize = regsizes[i];
if (!info->io.regsize)
info->io.regsize = DEFAULT_REGSPACING;
info->io.regsize = DEFAULT_REGSIZE;
info->io.regshift = regshifts[i];
info->irq = irqs[i];
if (info->irq)
@ -2273,136 +2274,105 @@ static void spmi_find_bmc(void)
}
#endif
#ifdef CONFIG_DMI
struct dmi_ipmi_data {
u8 type;
u8 addr_space;
unsigned long base_addr;
u8 irq;
u8 offset;
u8 slave_addr;
};
static int decode_dmi(const struct dmi_header *dm,
struct dmi_ipmi_data *dmi)
#if defined(CONFIG_DMI) || defined(CONFIG_ACPI)
struct resource *ipmi_get_info_from_resources(struct platform_device *pdev,
struct smi_info *info)
{
const u8 *data = (const u8 *)dm;
unsigned long base_addr;
u8 reg_spacing;
u8 len = dm->length;
struct resource *res, *res_second;
dmi->type = data[4];
memcpy(&base_addr, data+8, sizeof(unsigned long));
if (len >= 0x11) {
if (base_addr & 1) {
/* I/O */
base_addr &= 0xFFFE;
dmi->addr_space = IPMI_IO_ADDR_SPACE;
} else
/* Memory */
dmi->addr_space = IPMI_MEM_ADDR_SPACE;
/* If bit 4 of byte 0x10 is set, then the lsb for the address
is odd. */
dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
dmi->irq = data[0x11];
/* The top two bits of byte 0x10 hold the register spacing. */
reg_spacing = (data[0x10] & 0xC0) >> 6;
switch (reg_spacing) {
case 0x00: /* Byte boundaries */
dmi->offset = 1;
break;
case 0x01: /* 32-bit boundaries */
dmi->offset = 4;
break;
case 0x02: /* 16-byte boundaries */
dmi->offset = 16;
break;
default:
/* Some other interface, just ignore it. */
return -EIO;
}
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res) {
info->io_setup = port_setup;
info->io.addr_type = IPMI_IO_ADDR_SPACE;
} 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.
*/
dmi->base_addr = base_addr & 0xfffe;
dmi->addr_space = IPMI_IO_ADDR_SPACE;
dmi->offset = 1;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res) {
info->io_setup = mem_setup;
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
}
}
if (!res) {
dev_err(&pdev->dev, "no I/O or memory address\n");
return NULL;
}
info->io.addr_data = res->start;
dmi->slave_addr = data[6];
info->io.regspacing = DEFAULT_REGSPACING;
res_second = platform_get_resource(pdev,
(info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
IORESOURCE_IO : IORESOURCE_MEM,
1);
if (res_second) {
if (res_second->start > info->io.addr_data)
info->io.regspacing =
res_second->start - info->io.addr_data;
}
info->io.regsize = DEFAULT_REGSIZE;
info->io.regshift = 0;
return 0;
return res;
}
static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
#endif
#ifdef CONFIG_DMI
static int dmi_ipmi_probe(struct platform_device *pdev)
{
struct smi_info *info;
u8 type, slave_addr;
int rv;
if (!si_trydmi)
return -ENODEV;
rv = device_property_read_u8(&pdev->dev, "ipmi-type", &type);
if (rv)
return -ENODEV;
info = smi_info_alloc();
if (!info) {
pr_err(PFX "Could not allocate SI data\n");
return;
return -ENOMEM;
}
info->addr_source = SI_SMBIOS;
pr_info(PFX "probing via SMBIOS\n");
switch (ipmi_data->type) {
case 0x01: /* KCS */
switch (type) {
case IPMI_DMI_TYPE_KCS:
info->si_type = SI_KCS;
break;
case 0x02: /* SMIC */
case IPMI_DMI_TYPE_SMIC:
info->si_type = SI_SMIC;
break;
case 0x03: /* BT */
case IPMI_DMI_TYPE_BT:
info->si_type = SI_BT;
break;
default:
kfree(info);
return;
return -EINVAL;
}
switch (ipmi_data->addr_space) {
case IPMI_MEM_ADDR_SPACE:
info->io_setup = mem_setup;
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
break;
case IPMI_IO_ADDR_SPACE:
info->io_setup = port_setup;
info->io.addr_type = IPMI_IO_ADDR_SPACE;
break;
default:
kfree(info);
pr_warn(PFX "Unknown SMBIOS I/O Address type: %d\n",
ipmi_data->addr_space);
return;
if (!ipmi_get_info_from_resources(pdev, info)) {
rv = -EINVAL;
goto err_free;
}
info->io.addr_data = ipmi_data->base_addr;
info->io.regspacing = ipmi_data->offset;
if (!info->io.regspacing)
info->io.regspacing = DEFAULT_REGSPACING;
info->io.regsize = DEFAULT_REGSPACING;
info->io.regshift = 0;
rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
if (rv) {
dev_warn(&pdev->dev, "device has no slave-addr property");
info->slave_addr = 0x20;
} else {
info->slave_addr = slave_addr;
}
info->slave_addr = ipmi_data->slave_addr;
info->irq = ipmi_data->irq;
if (info->irq)
info->irq = platform_get_irq(pdev, 0);
if (info->irq > 0)
info->irq_setup = std_irq_setup;
else
info->irq = 0;
info->dev = &pdev->dev;
pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
(info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
@ -2411,21 +2381,17 @@ static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
if (add_smi(info))
kfree(info);
return 0;
err_free:
kfree(info);
return rv;
}
static void dmi_find_bmc(void)
#else
static int dmi_ipmi_probe(struct platform_device *pdev)
{
const struct dmi_device *dev = NULL;
struct dmi_ipmi_data data;
int rv;
while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
memset(&data, 0, sizeof(data));
rv = decode_dmi((const struct dmi_header *) dev->device_data,
&data);
if (!rv)
try_init_dmi(&data);
}
return -ENODEV;
}
#endif /* CONFIG_DMI */
@ -2684,17 +2650,47 @@ static int of_ipmi_probe(struct platform_device *dev)
#endif
#ifdef CONFIG_ACPI
static int find_slave_address(struct smi_info *info, int slave_addr)
{
#ifdef CONFIG_IPMI_DMI_DECODE
if (!slave_addr) {
int type = -1;
u32 flags = IORESOURCE_IO;
switch (info->si_type) {
case SI_KCS:
type = IPMI_DMI_TYPE_KCS;
break;
case SI_BT:
type = IPMI_DMI_TYPE_BT;
break;
case SI_SMIC:
type = IPMI_DMI_TYPE_SMIC;
break;
}
if (info->io.addr_type == IPMI_MEM_ADDR_SPACE)
flags = IORESOURCE_MEM;
slave_addr = ipmi_dmi_get_slave_addr(type, flags,
info->io.addr_data);
}
#endif
return slave_addr;
}
static int acpi_ipmi_probe(struct platform_device *dev)
{
struct smi_info *info;
struct resource *res, *res_second;
acpi_handle handle;
acpi_status status;
unsigned long long tmp;
struct resource *res;
int rv = -EINVAL;
if (!si_tryacpi)
return 0;
return -ENODEV;
handle = ACPI_HANDLE(&dev->dev);
if (!handle)
@ -2734,35 +2730,11 @@ static int acpi_ipmi_probe(struct platform_device *dev)
goto err_free;
}
res = platform_get_resource(dev, IORESOURCE_IO, 0);
if (res) {
info->io_setup = port_setup;
info->io.addr_type = IPMI_IO_ADDR_SPACE;
} else {
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (res) {
info->io_setup = mem_setup;
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
}
}
res = ipmi_get_info_from_resources(dev, info);
if (!res) {
dev_err(&dev->dev, "no I/O or memory address\n");
rv = -EINVAL;
goto err_free;
}
info->io.addr_data = res->start;
info->io.regspacing = DEFAULT_REGSPACING;
res_second = platform_get_resource(dev,
(info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
IORESOURCE_IO : IORESOURCE_MEM,
1);
if (res_second) {
if (res_second->start > info->io.addr_data)
info->io.regspacing =
res_second->start - info->io.addr_data;
}
info->io.regsize = DEFAULT_REGSPACING;
info->io.regshift = 0;
/* If _GPE exists, use it; otherwise use standard interrupts */
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
@ -2778,6 +2750,8 @@ static int acpi_ipmi_probe(struct platform_device *dev)
}
}
info->slave_addr = find_slave_address(info, info->slave_addr);
info->dev = &dev->dev;
platform_set_drvdata(dev, info);
@ -2813,7 +2787,10 @@ static int ipmi_probe(struct platform_device *dev)
if (of_ipmi_probe(dev) == 0)
return 0;
return acpi_ipmi_probe(dev);
if (acpi_ipmi_probe(dev) == 0)
return 0;
return dmi_ipmi_probe(dev);
}
static int ipmi_remove(struct platform_device *dev)
@ -3786,11 +3763,6 @@ static int init_ipmi_si(void)
}
#endif
#ifdef CONFIG_DMI
if (si_trydmi)
dmi_find_bmc();
#endif
#ifdef CONFIG_ACPI
if (si_tryacpi)
spmi_find_bmc();
@ -3938,6 +3910,7 @@ static void cleanup_ipmi_si(void)
}
module_exit(cleanup_ipmi_si);
MODULE_ALIAS("platform:dmi-ipmi-si");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"

176
drivers/char/ipmi/ipmi_ssif.c
View File

@ -53,6 +53,7 @@
#include <linux/acpi.h>
#include <linux/ctype.h>
#include <linux/time64.h>
#include "ipmi_dmi.h"
#define PFX "ipmi_ssif: "
#define DEVICE_NAME "ipmi_ssif"
@ -180,6 +181,8 @@ struct ssif_addr_info {
int slave_addr;
enum ipmi_addr_src addr_src;
union ipmi_smi_info_union addr_info;
struct device *dev;
struct i2c_client *client;
struct mutex clients_mutex;
struct list_head clients;
@ -408,6 +411,7 @@ static void start_event_fetch(struct ssif_info *ssif_info, unsigned long *flags)
msg = ipmi_alloc_smi_msg();
if (!msg) {
ssif_info->ssif_state = SSIF_NORMAL;
ipmi_ssif_unlock_cond(ssif_info, flags);
return;
}
@ -430,6 +434,7 @@ static void start_recv_msg_fetch(struct ssif_info *ssif_info,
msg = ipmi_alloc_smi_msg();
if (!msg) {
ssif_info->ssif_state = SSIF_NORMAL;
ipmi_ssif_unlock_cond(ssif_info, flags);
return;
}
@ -761,6 +766,11 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
result, len, data[2]);
} else if (data[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2
|| data[1] != IPMI_GET_MSG_FLAGS_CMD) {
/*
* Don't abort here, maybe it was a queued
* response to a previous command.
*/
ipmi_ssif_unlock_cond(ssif_info, flags);
pr_warn(PFX "Invalid response getting flags: %x %x\n",
data[0], data[1]);
} else {
@ -1094,7 +1104,7 @@ static int inc_usecount(void *send_info)
{
struct ssif_info *ssif_info = send_info;
if (!i2c_get_adapter(ssif_info->client->adapter->nr))
if (!i2c_get_adapter(i2c_adapter_id(ssif_info->client->adapter)))
return -ENODEV;
i2c_use_client(ssif_info->client);
@ -1169,6 +1179,7 @@ static LIST_HEAD(ssif_infos);
static int ssif_remove(struct i2c_client *client)
{
struct ssif_info *ssif_info = i2c_get_clientdata(client);
struct ssif_addr_info *addr_info;
int rv;
if (!ssif_info)
@ -1196,6 +1207,13 @@ static int ssif_remove(struct i2c_client *client)
kthread_stop(ssif_info->thread);
}
list_for_each_entry(addr_info, &ssif_infos, link) {
if (addr_info->client == client) {
addr_info->client = NULL;
break;
}
}
/*
* No message can be outstanding now, we have removed the
* upper layer and it permitted us to do so.
@ -1404,28 +1422,13 @@ static bool check_acpi(struct ssif_info *ssif_info, struct device *dev)
static int find_slave_address(struct i2c_client *client, int slave_addr)
{
struct ssif_addr_info *info;
if (slave_addr)
return slave_addr;
/*
* Came in without a slave address, search around to see if
* the other sources have a slave address. This lets us pick
* up an SMBIOS slave address when using ACPI.
*/
list_for_each_entry(info, &ssif_infos, link) {
if (info->binfo.addr != client->addr)
continue;
if (info->adapter_name && client->adapter->name &&
strcmp_nospace(info->adapter_name,
client->adapter->name))
continue;
if (info->slave_addr) {
slave_addr = info->slave_addr;
break;
}
}
#ifdef CONFIG_IPMI_DMI_DECODE
if (!slave_addr)
slave_addr = ipmi_dmi_get_slave_addr(
IPMI_DMI_TYPE_SSIF,
i2c_adapter_id(client->adapter),
client->addr);
#endif
return slave_addr;
}
@ -1447,7 +1450,6 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
u8 slave_addr = 0;
struct ssif_addr_info *addr_info = NULL;
resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
if (!resp)
return -ENOMEM;
@ -1468,6 +1470,7 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
ssif_info->addr_source = addr_info->addr_src;
ssif_info->ssif_debug = addr_info->debug;
ssif_info->addr_info = addr_info->addr_info;
addr_info->client = client;
slave_addr = addr_info->slave_addr;
}
}
@ -1664,7 +1667,8 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
unsigned int thread_num;
thread_num = ((ssif_info->client->adapter->nr << 8) |
thread_num = ((i2c_adapter_id(ssif_info->client->adapter)
<< 8) |
ssif_info->client->addr);
init_completion(&ssif_info->wake_thread);
ssif_info->thread = kthread_run(ipmi_ssif_thread, ssif_info,
@ -1705,8 +1709,19 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
}
out:
if (rv)
if (rv) {
/*
* Note that if addr_info->client is assigned, we
* leave it. The i2c client hangs around even if we
* return a failure here, and the failure here is not
* propagated back to the i2c code. This seems to be
* design intent, strange as it may be. But if we
* don't leave it, ssif_platform_remove will not remove
* the client like it should.
*/
dev_err(&client->dev, "Unable to start IPMI SSIF: %d\n", rv);
kfree(ssif_info);
}
kfree(resp);
return rv;
@ -1731,7 +1746,8 @@ static int ssif_adapter_handler(struct device *adev, void *opaque)
static int new_ssif_client(int addr, char *adapter_name,
int debug, int slave_addr,
enum ipmi_addr_src addr_src)
enum ipmi_addr_src addr_src,
struct device *dev)
{
struct ssif_addr_info *addr_info;
int rv = 0;
@ -1764,6 +1780,10 @@ static int new_ssif_client(int addr, char *adapter_name,
addr_info->debug = debug;
addr_info->slave_addr = slave_addr;
addr_info->addr_src = addr_src;
addr_info->dev = dev;
if (dev)
dev_set_drvdata(dev, addr_info);
list_add_tail(&addr_info->link, &ssif_infos);
@ -1902,7 +1922,7 @@ static int try_init_spmi(struct SPMITable *spmi)
myaddr = spmi->addr.address & 0x7f;
return new_ssif_client(myaddr, NULL, 0, 0, SI_SPMI);
return new_ssif_client(myaddr, NULL, 0, 0, SI_SPMI, NULL);
}
static void spmi_find_bmc(void)
@ -1931,48 +1951,40 @@ static void spmi_find_bmc(void) { }
#endif
#ifdef CONFIG_DMI
static int decode_dmi(const struct dmi_device *dmi_dev)
static int dmi_ipmi_probe(struct platform_device *pdev)
{
struct dmi_header *dm = dmi_dev->device_data;
u8 *data = (u8 *) dm;
u8 len = dm->length;
unsigned short myaddr;
int slave_addr;
u8 type, slave_addr = 0;
u16 i2c_addr;
int rv;
if (num_addrs >= MAX_SSIF_BMCS)
return -1;
if (!ssif_trydmi)
return -ENODEV;
if (len < 9)
return -1;
rv = device_property_read_u8(&pdev->dev, "ipmi-type", &type);
if (rv)
return -ENODEV;
if (data[0x04] != 4) /* Not SSIF */
return -1;
if (type != IPMI_DMI_TYPE_SSIF)
return -ENODEV;
if ((data[8] >> 1) == 0) {
/*
* Some broken systems put the I2C address in
* the slave address field. We try to
* accommodate them here.
*/
myaddr = data[6] >> 1;
slave_addr = 0;
} else {
myaddr = data[8] >> 1;
slave_addr = data[6];
rv = device_property_read_u16(&pdev->dev, "i2c-addr", &i2c_addr);
if (rv) {
dev_warn(&pdev->dev, PFX "No i2c-addr property\n");
return -ENODEV;
}
return new_ssif_client(myaddr, NULL, 0, slave_addr, SI_SMBIOS);
}
rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
if (rv)
dev_warn(&pdev->dev, "device has no slave-addr property");
static void dmi_iterator(void)
{
const struct dmi_device *dev = NULL;
while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev)))
decode_dmi(dev);
return new_ssif_client(i2c_addr, NULL, 0,
slave_addr, SI_SMBIOS, &pdev->dev);
}
#else
static void dmi_iterator(void) { }
static int dmi_ipmi_probe(struct platform_device *pdev)
{
return -ENODEV;
}
#endif
static const struct i2c_device_id ssif_id[] = {
@ -1993,6 +2005,36 @@ static struct i2c_driver ssif_i2c_driver = {
.detect = ssif_detect
};
static int ssif_platform_probe(struct platform_device *dev)
{
return dmi_ipmi_probe(dev);
}
static int ssif_platform_remove(struct platform_device *dev)
{
struct ssif_addr_info *addr_info = dev_get_drvdata(&dev->dev);
if (!addr_info)
return 0;
mutex_lock(&ssif_infos_mutex);
if (addr_info->client)
i2c_unregister_device(addr_info->client);
list_del(&addr_info->link);
kfree(addr_info);
mutex_unlock(&ssif_infos_mutex);
return 0;
}
static struct platform_driver ipmi_driver = {
.driver = {
.name = DEVICE_NAME,
},
.probe = ssif_platform_probe,
.remove = ssif_platform_remove,
};
static int init_ipmi_ssif(void)
{
int i;
@ -2007,7 +2049,7 @@ static int init_ipmi_ssif(void)
for (i = 0; i < num_addrs; i++) {
rv = new_ssif_client(addr[i], adapter_name[i],
dbg[i], slave_addrs[i],
SI_HARDCODED);
SI_HARDCODED, NULL);
if (rv)
pr_err(PFX
"Couldn't add hardcoded device at addr 0x%x\n",
@ -2017,11 +2059,16 @@ static int init_ipmi_ssif(void)
if (ssif_tryacpi)
ssif_i2c_driver.driver.acpi_match_table =
ACPI_PTR(ssif_acpi_match);
if (ssif_trydmi)
dmi_iterator();
if (ssif_tryacpi)
spmi_find_bmc();
if (ssif_trydmi) {
rv = platform_driver_register(&ipmi_driver);
if (rv)
pr_err(PFX "Unable to register driver: %d\n", rv);
}
ssif_i2c_driver.address_list = ssif_address_list();
rv = i2c_add_driver(&ssif_i2c_driver);
@ -2041,10 +2088,13 @@ static void cleanup_ipmi_ssif(void)
i2c_del_driver(&ssif_i2c_driver);
platform_driver_unregister(&ipmi_driver);
free_ssif_clients();
}
module_exit(cleanup_ipmi_ssif);
MODULE_ALIAS("platform:dmi-ipmi-ssif");
MODULE_AUTHOR("Todd C Davis <todd.c.davis@intel.com>, Corey Minyard <minyard@acm.org>");
MODULE_DESCRIPTION("IPMI driver for management controllers on a SMBus");
MODULE_LICENSE("GPL");

7
drivers/char/ipmi/ipmi_watchdog.c
View File

@ -1163,10 +1163,11 @@ static int wdog_reboot_handler(struct notifier_block *this,
ipmi_watchdog_state = WDOG_TIMEOUT_NONE;
ipmi_set_timeout(IPMI_SET_TIMEOUT_NO_HB);
} else if (ipmi_watchdog_state != WDOG_TIMEOUT_NONE) {
/* Set a long timer to let the reboot happens, but
reboot if it hangs, but only if the watchdog
/* Set a long timer to let the reboot happen or
reset if it hangs, but only if the watchdog
timer was already running. */
timeout = 120;
if (timeout < 120)
timeout = 120;
pretimeout = 0;
ipmi_watchdog_state = WDOG_TIMEOUT_RESET;
ipmi_set_timeout(IPMI_SET_TIMEOUT_NO_HB);