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ipmi: Convert DMI handling over to a platform device 

Now that the IPMI DMI code creates a platform device for IPMI devices
in the firmware, use that instead of handling all the DMI work
in the IPMI drivers themselves.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Andy Lutomirski <luto@kernel.org>
This commit is contained in:
Corey Minyard 2016-02-03 10:45:28 -06:00
parent 9f88145f18
commit 0944d889a2
2 changed files with 219 additions and 204 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

261
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>
@ -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_REGSIZE;
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_REGSIZE;
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"

162
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;
@ -1171,6 +1174,7 @@ 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)
@ -1198,6 +1202,13 @@ 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.
@ -1406,27 +1417,13 @@ 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 && 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;
}
@ -1448,7 +1445,6 @@ 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;
@ -1469,6 +1465,7 @@ 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;
}
}
@ -1707,8 +1704,19 @@ 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;
@ -1733,7 +1741,8 @@ 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;
@ -1766,6 +1775,9 @@ 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;
dev_set_drvdata(dev, addr_info);
list_add_tail(&addr_info->link, &ssif_infos);
@ -1904,7 +1916,7 @@ 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)
@ -1933,48 +1945,40 @@ 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[] = {
@ -1995,6 +1999,36 @@ 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;
@ -2009,7 +2043,7 @@ 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",
@ -2019,11 +2053,16 @@ 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);
@ -2043,10 +2082,13 @@ 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");