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Code Issues Releases Wiki Activity

ipmi_si: Move platform device handling to another file

Browse source 
Signed-off-by: Corey Minyard <cminyard@mvista.com>

Stephen Rothwell <sfr@canb.auug.org.au> fixed an issue with the
include files
This commit is contained in:
Corey Minyard 2017-09-12 22:55:57 -05:00
parent 7a4533087c
commit 9d70029edb
4 changed files with 613 additions and 589 deletions
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2
drivers/char/ipmi/Makefile
View file

@ -3,7 +3,7 @@
#
ipmi_si-y := ipmi_si_intf.o ipmi_kcs_sm.o ipmi_smic_sm.o ipmi_bt_sm.o \
ipmi_si_hotmod.o ipmi_si_hardcode.o
ipmi_si_hotmod.o ipmi_si_hardcode.o ipmi_si_platform.o
obj-$(CONFIG_IPMI_HANDLER) += ipmi_msghandler.o
obj-$(CONFIG_IPMI_DEVICE_INTERFACE) += ipmi_devintf.o

6
drivers/char/ipmi/ipmi_si.h
View file

@ -14,6 +14,8 @@
#define DEFAULT_REGSPACING 1
#define DEFAULT_REGSIZE 1
#define DEVICE_NAME "ipmi_si"
int ipmi_si_add_smi(struct si_sm_io *io);
irqreturn_t ipmi_si_irq_handler(int irq, void *data);
void ipmi_irq_start_cleanup(struct si_sm_io *io);
@ -23,3 +25,7 @@ int ipmi_si_remove_by_dev(struct device *dev);
void ipmi_si_remove_by_data(int addr_space, enum si_type si_type,
unsigned long addr);
int ipmi_si_hardcode_find_bmc(void);
void ipmi_si_platform_init(void);
void ipmi_si_platform_shutdown(void);
extern struct platform_driver ipmi_platform_driver;

592
drivers/char/ipmi/ipmi_si_intf.c
View file

@ -61,15 +61,8 @@
#include <linux/ipmi_smi.h>
#include <asm/io.h>
#include "ipmi_si.h"
#include "ipmi_dmi.h"
#include <linux/dmi.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/acpi.h>
#ifdef CONFIG_PARISC
#include <asm/hardware.h> /* for register_parisc_driver() stuff */
@ -106,10 +99,6 @@ enum si_intf_state {
static const char * const si_to_str[] = { "kcs", "smic", "bt" };
#define DEVICE_NAME "ipmi_si"
static struct platform_driver ipmi_driver;
static int initialized;
/*
@ -1274,33 +1263,12 @@ static LIST_HEAD(smi_infos);
static DEFINE_MUTEX(smi_infos_lock);
static int smi_num; /* Used to sequence the SMIs */
#ifdef CONFIG_ACPI
static bool si_tryacpi = true;
#endif
#ifdef CONFIG_DMI
static bool si_trydmi = true;
#endif
static bool si_tryplatform = true;
#ifdef CONFIG_PCI
static bool si_trypci = true;
#endif
static const char * const addr_space_to_str[] = { "i/o", "mem" };
#ifdef CONFIG_ACPI
module_param_named(tryacpi, si_tryacpi, bool, 0);
MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
" default scan of the interfaces identified via ACPI");
#endif
#ifdef CONFIG_DMI
module_param_named(trydmi, si_trydmi, bool, 0);
MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
" default scan of the interfaces identified via DMI");
#endif
module_param_named(tryplatform, si_tryplatform, bool, 0);
MODULE_PARM_DESC(tryplatform, "Setting this to zero will disable the"
" default scan of the interfaces identified via platform"
" interfaces like openfirmware");
#ifdef CONFIG_PCI
module_param_named(trypci, si_trypci, bool, 0);
MODULE_PARM_DESC(trypci, "Setting this to zero will disable the"
@ -1626,310 +1594,6 @@ static struct smi_info *smi_info_alloc(void)
return info;
}
#ifdef CONFIG_ACPI
/*
* Once we get an ACPI failure, we don't try any more, because we go
* through the tables sequentially. Once we don't find a table, there
* are no more.
*/
static int acpi_failure;
/* For GPE-type interrupts. */
static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
u32 gpe_number, void *context)
{
struct si_sm_io *io = context;
ipmi_si_irq_handler(io->irq, io->irq_handler_data);
return ACPI_INTERRUPT_HANDLED;
}
static void acpi_gpe_irq_cleanup(struct si_sm_io *io)
{
if (!io->irq)
return;
ipmi_irq_start_cleanup(io);
acpi_remove_gpe_handler(NULL, io->irq, &ipmi_acpi_gpe);
}
static int acpi_gpe_irq_setup(struct si_sm_io *io)
{
acpi_status status;
if (!io->irq)
return 0;
status = acpi_install_gpe_handler(NULL,
io->irq,
ACPI_GPE_LEVEL_TRIGGERED,
&ipmi_acpi_gpe,
io);
if (status != AE_OK) {
dev_warn(io->dev,
"Unable to claim ACPI GPE %d, running polled\n",
io->irq);
io->irq = 0;
return -EINVAL;
} else {
io->irq_cleanup = acpi_gpe_irq_cleanup;
ipmi_irq_finish_setup(io);
dev_info(io->dev, "Using ACPI GPE %d\n", io->irq);
return 0;
}
}
/*
* Defined at
* http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
*/
struct SPMITable {
s8 Signature[4];
u32 Length;
u8 Revision;
u8 Checksum;
s8 OEMID[6];
s8 OEMTableID[8];
s8 OEMRevision[4];
s8 CreatorID[4];
s8 CreatorRevision[4];
u8 InterfaceType;
u8 IPMIlegacy;
s16 SpecificationRevision;
/*
* Bit 0 - SCI interrupt supported
* Bit 1 - I/O APIC/SAPIC
*/
u8 InterruptType;
/*
* If bit 0 of InterruptType is set, then this is the SCI
* interrupt in the GPEx_STS register.
*/
u8 GPE;
s16 Reserved;
/*
* If bit 1 of InterruptType is set, then this is the I/O
* APIC/SAPIC interrupt.
*/
u32 GlobalSystemInterrupt;
/* The actual register address. */
struct acpi_generic_address addr;
u8 UID[4];
s8 spmi_id[1]; /* A '\0' terminated array starts here. */
};
static int try_init_spmi(struct SPMITable *spmi)
{
struct si_sm_io io;
if (spmi->IPMIlegacy != 1) {
pr_info(PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
return -ENODEV;
}
memset(&io, 0, sizeof(io));
io.addr_source = SI_SPMI;
pr_info(PFX "probing via SPMI\n");
/* Figure out the interface type. */
switch (spmi->InterfaceType) {
case 1: /* KCS */
io.si_type = SI_KCS;
break;
case 2: /* SMIC */
io.si_type = SI_SMIC;
break;
case 3: /* BT */
io.si_type = SI_BT;
break;
case 4: /* SSIF, just ignore */
return -EIO;
default:
pr_info(PFX "Unknown ACPI/SPMI SI type %d\n",
spmi->InterfaceType);
return -EIO;
}
if (spmi->InterruptType & 1) {
/* We've got a GPE interrupt. */
io.irq = spmi->GPE;
io.irq_setup = acpi_gpe_irq_setup;
} else if (spmi->InterruptType & 2) {
/* We've got an APIC/SAPIC interrupt. */
io.irq = spmi->GlobalSystemInterrupt;
io.irq_setup = ipmi_std_irq_setup;
} else {
/* Use the default interrupt setting. */
io.irq = 0;
io.irq_setup = NULL;
}
if (spmi->addr.bit_width) {
/* A (hopefully) properly formed register bit width. */
io.regspacing = spmi->addr.bit_width / 8;
} else {
io.regspacing = DEFAULT_REGSPACING;
}
io.regsize = io.regspacing;
io.regshift = spmi->addr.bit_offset;
if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
io.addr_type = IPMI_MEM_ADDR_SPACE;
} else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
io.addr_type = IPMI_IO_ADDR_SPACE;
} else {
pr_warn(PFX "Unknown ACPI I/O Address type\n");
return -EIO;
}
io.addr_data = spmi->addr.address;
pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
(io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
io.addr_data, io.regsize, io.regspacing, io.irq);
return ipmi_si_add_smi(&io);
}
static void spmi_find_bmc(void)
{
acpi_status status;
struct SPMITable *spmi;
int i;
if (acpi_disabled)
return;
if (acpi_failure)
return;
for (i = 0; ; i++) {
status = acpi_get_table(ACPI_SIG_SPMI, i+1,
(struct acpi_table_header **)&spmi);
if (status != AE_OK)
return;
try_init_spmi(spmi);
}
}
#endif
#if defined(CONFIG_DMI) || defined(CONFIG_ACPI)
static struct resource *
ipmi_get_info_from_resources(struct platform_device *pdev,
struct si_sm_io *io)
{
struct resource *res, *res_second;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res) {
io->addr_type = IPMI_IO_ADDR_SPACE;
} else {
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res)
io->addr_type = IPMI_MEM_ADDR_SPACE;
}
if (!res) {
dev_err(&pdev->dev, "no I/O or memory address\n");
return NULL;
}
io->addr_data = res->start;
io->regspacing = DEFAULT_REGSPACING;
res_second = platform_get_resource(pdev,
(io->addr_type == IPMI_IO_ADDR_SPACE) ?
IORESOURCE_IO : IORESOURCE_MEM,
1);
if (res_second) {
if (res_second->start > io->addr_data)
io->regspacing = res_second->start - io->addr_data;
}
io->regsize = DEFAULT_REGSIZE;
io->regshift = 0;
return res;
}
#endif
#ifdef CONFIG_DMI
static int dmi_ipmi_probe(struct platform_device *pdev)
{
struct si_sm_io io;
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;
memset(&io, 0, sizeof(io));
io.addr_source = SI_SMBIOS;
pr_info(PFX "probing via SMBIOS\n");
switch (type) {
case IPMI_DMI_TYPE_KCS:
io.si_type = SI_KCS;
break;
case IPMI_DMI_TYPE_SMIC:
io.si_type = SI_SMIC;
break;
case IPMI_DMI_TYPE_BT:
io.si_type = SI_BT;
break;
default:
return -EINVAL;
}
if (!ipmi_get_info_from_resources(pdev, &io)) {
rv = -EINVAL;
goto err_free;
}
rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
if (rv) {
dev_warn(&pdev->dev, "device has no slave-addr property");
io.slave_addr = 0x20;
} else {
io.slave_addr = slave_addr;
}
io.irq = platform_get_irq(pdev, 0);
if (io.irq > 0)
io.irq_setup = ipmi_std_irq_setup;
else
io.irq = 0;
io.dev = &pdev->dev;
pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
(io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
io.addr_data, io.regsize, io.regspacing, io.irq);
ipmi_si_add_smi(&io);
return 0;
err_free:
return rv;
}
#else
static int dmi_ipmi_probe(struct platform_device *pdev)
{
return -ENODEV;
}
#endif /* CONFIG_DMI */
#ifdef CONFIG_PCI
#define PCI_ERMC_CLASSCODE 0x0C0700
@ -2064,243 +1728,6 @@ static struct pci_driver ipmi_pci_driver = {
};
#endif /* CONFIG_PCI */
#ifdef CONFIG_OF
static const struct of_device_id of_ipmi_match[] = {
{ .type = "ipmi", .compatible = "ipmi-kcs",
.data = (void *)(unsigned long) SI_KCS },
{ .type = "ipmi", .compatible = "ipmi-smic",
.data = (void *)(unsigned long) SI_SMIC },
{ .type = "ipmi", .compatible = "ipmi-bt",
.data = (void *)(unsigned long) SI_BT },
{},
};
MODULE_DEVICE_TABLE(of, of_ipmi_match);
static int of_ipmi_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct si_sm_io io;
struct resource resource;
const __be32 *regsize, *regspacing, *regshift;
struct device_node *np = pdev->dev.of_node;
int ret;
int proplen;
dev_info(&pdev->dev, "probing via device tree\n");
match = of_match_device(of_ipmi_match, &pdev->dev);
if (!match)
return -ENODEV;
if (!of_device_is_available(np))
return -EINVAL;
ret = of_address_to_resource(np, 0, &resource);
if (ret) {
dev_warn(&pdev->dev, PFX "invalid address from OF\n");
return ret;
}
regsize = of_get_property(np, "reg-size", &proplen);
if (regsize && proplen != 4) {
dev_warn(&pdev->dev, PFX "invalid regsize from OF\n");
return -EINVAL;
}
regspacing = of_get_property(np, "reg-spacing", &proplen);
if (regspacing && proplen != 4) {
dev_warn(&pdev->dev, PFX "invalid regspacing from OF\n");
return -EINVAL;
}
regshift = of_get_property(np, "reg-shift", &proplen);
if (regshift && proplen != 4) {
dev_warn(&pdev->dev, PFX "invalid regshift from OF\n");
return -EINVAL;
}
memset(&io, 0, sizeof(io));
io.si_type = (enum si_type) match->data;
io.addr_source = SI_DEVICETREE;
io.irq_setup = ipmi_std_irq_setup;
if (resource.flags & IORESOURCE_IO)
io.addr_type = IPMI_IO_ADDR_SPACE;
else
io.addr_type = IPMI_MEM_ADDR_SPACE;
io.addr_data = resource.start;
io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
io.regshift = regshift ? be32_to_cpup(regshift) : 0;
io.irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
io.dev = &pdev->dev;
dev_dbg(&pdev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
io.addr_data, io.regsize, io.regspacing, io.irq);
return ipmi_si_add_smi(&io);
}
#else
#define of_ipmi_match NULL
static int of_ipmi_probe(struct platform_device *dev)
{
return -ENODEV;
}
#endif
#ifdef CONFIG_ACPI
static int find_slave_address(struct si_sm_io *io, int slave_addr)
{
#ifdef CONFIG_IPMI_DMI_DECODE
if (!slave_addr) {
int type = -1;
u32 flags = IORESOURCE_IO;
switch (io->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 (io->addr_type == IPMI_MEM_ADDR_SPACE)
flags = IORESOURCE_MEM;
slave_addr = ipmi_dmi_get_slave_addr(type, flags,
io->addr_data);
}
#endif
return slave_addr;
}
static int acpi_ipmi_probe(struct platform_device *pdev)
{
struct si_sm_io io;
acpi_handle handle;
acpi_status status;
unsigned long long tmp;
struct resource *res;
int rv = -EINVAL;
if (!si_tryacpi)
return -ENODEV;
handle = ACPI_HANDLE(&pdev->dev);
if (!handle)
return -ENODEV;
memset(&io, 0, sizeof(io));
io.addr_source = SI_ACPI;
dev_info(&pdev->dev, PFX "probing via ACPI\n");
io.addr_info.acpi_info.acpi_handle = handle;
/* _IFT tells us the interface type: KCS, BT, etc */
status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
if (ACPI_FAILURE(status)) {
dev_err(&pdev->dev,
"Could not find ACPI IPMI interface type\n");
goto err_free;
}
switch (tmp) {
case 1:
io.si_type = SI_KCS;
break;
case 2:
io.si_type = SI_SMIC;
break;
case 3:
io.si_type = SI_BT;
break;
case 4: /* SSIF, just ignore */
rv = -ENODEV;
goto err_free;
default:
dev_info(&pdev->dev, "unknown IPMI type %lld\n", tmp);
goto err_free;
}
res = ipmi_get_info_from_resources(pdev, &io);
if (!res) {
rv = -EINVAL;
goto err_free;
}
/* If _GPE exists, use it; otherwise use standard interrupts */
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
if (ACPI_SUCCESS(status)) {
io.irq = tmp;
io.irq_setup = acpi_gpe_irq_setup;
} else {
int irq = platform_get_irq(pdev, 0);
if (irq > 0) {
io.irq = irq;
io.irq_setup = ipmi_std_irq_setup;
}
}
io.slave_addr = find_slave_address(&io, io.slave_addr);
io.dev = &pdev->dev;
dev_info(io.dev, "%pR regsize %d spacing %d irq %d\n",
res, io.regsize, io.regspacing, io.irq);
return ipmi_si_add_smi(&io);
err_free:
return rv;
}
static const struct acpi_device_id acpi_ipmi_match[] = {
{ "IPI0001", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, acpi_ipmi_match);
#else
static int acpi_ipmi_probe(struct platform_device *dev)
{
return -ENODEV;
}
#endif
static int ipmi_probe(struct platform_device *pdev)
{
if (pdev->dev.of_node && of_ipmi_probe(pdev) == 0)
return 0;
if (acpi_ipmi_probe(pdev) == 0)
return 0;
return dmi_ipmi_probe(pdev);
}
static int ipmi_remove(struct platform_device *pdev)
{
return ipmi_si_remove_by_dev(&pdev->dev);
}
static struct platform_driver ipmi_driver = {
.driver = {
.name = DEVICE_NAME,
.of_match_table = of_ipmi_match,
.acpi_match_table = ACPI_PTR(acpi_ipmi_match),
},
.probe = ipmi_probe,
.remove = ipmi_remove,
};
#ifdef CONFIG_PARISC
static int __init ipmi_parisc_probe(struct parisc_device *dev)
{
@ -3038,7 +2465,7 @@ static int try_smi_init(struct smi_info *new_smi)
goto out_err;
}
new_smi->io.dev = &new_smi->pdev->dev;
new_smi->io.dev->driver = &ipmi_driver.driver;
new_smi->io.dev->driver = &ipmi_platform_driver.driver;
/* Nulled by device_add() */
new_smi->io.dev->init_name = init_name;
}
@ -3233,20 +2660,14 @@ static int init_ipmi_si(void)
if (initialized)
return 0;
if (si_tryplatform) {
rv = platform_driver_register(&ipmi_driver);
if (rv) {
pr_err(PFX "Unable to register driver: %d\n", rv);
return rv;
}
}
pr_info("IPMI System Interface driver.\n");
/* If the user gave us a device, they presumably want us to use it */
if (!ipmi_si_hardcode_find_bmc())
goto do_scan;
ipmi_si_platform_init();
#ifdef CONFIG_PCI
if (si_trypci) {
rv = pci_register_driver(&ipmi_pci_driver);
@ -3257,11 +2678,6 @@ static int init_ipmi_si(void)
}
#endif
#ifdef CONFIG_ACPI
if (si_tryacpi)
spmi_find_bmc();
#endif
#ifdef CONFIG_PARISC
register_parisc_driver(&ipmi_parisc_driver);
parisc_registered = true;
@ -3430,7 +2846,7 @@ static void cleanup_ipmi_si(void)
unregister_parisc_driver(&ipmi_parisc_driver);
#endif
platform_driver_unregister(&ipmi_driver);
ipmi_si_platform_shutdown();
mutex_lock(&smi_infos_lock);
list_for_each_entry_safe(e, tmp_e, &smi_infos, link)

602
drivers/char/ipmi/ipmi_si_platform.c Normal file
View file

@ -0,0 +1,602 @@
/*
* ipmi_si_platform.c
*
* Handling for platform devices in IPMI (ACPI, OF, and things
* coming from the platform.
*/
#include <linux/types.h>
#include <linux/module.h>
#include "ipmi_dmi.h"
#include <linux/dmi.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/acpi.h>
#include "ipmi_si.h"
#define PFX "ipmi_platform: "
static bool si_tryplatform = true;
#ifdef CONFIG_ACPI
static bool si_tryacpi = true;
#endif
#ifdef CONFIG_DMI
static bool si_trydmi = true;
#endif
module_param_named(tryplatform, si_tryplatform, bool, 0);
MODULE_PARM_DESC(tryplatform, "Setting this to zero will disable the"
" default scan of the interfaces identified via platform"
" interfaces like openfirmware");
#ifdef CONFIG_ACPI
module_param_named(tryacpi, si_tryacpi, bool, 0);
MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
" default scan of the interfaces identified via ACPI");
#endif
#ifdef CONFIG_DMI
module_param_named(trydmi, si_trydmi, bool, 0);
MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
" default scan of the interfaces identified via DMI");
#endif
#ifdef CONFIG_ACPI
/*
* Once we get an ACPI failure, we don't try any more, because we go
* through the tables sequentially. Once we don't find a table, there
* are no more.
*/
static int acpi_failure;
/* For GPE-type interrupts. */
static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
u32 gpe_number, void *context)
{
struct si_sm_io *io = context;
ipmi_si_irq_handler(io->irq, io->irq_handler_data);
return ACPI_INTERRUPT_HANDLED;
}
static void acpi_gpe_irq_cleanup(struct si_sm_io *io)
{
if (!io->irq)
return;
ipmi_irq_start_cleanup(io);
acpi_remove_gpe_handler(NULL, io->irq, &ipmi_acpi_gpe);
}
static int acpi_gpe_irq_setup(struct si_sm_io *io)
{
acpi_status status;
if (!io->irq)
return 0;
status = acpi_install_gpe_handler(NULL,
io->irq,
ACPI_GPE_LEVEL_TRIGGERED,
&ipmi_acpi_gpe,
io);
if (status != AE_OK) {
dev_warn(io->dev,
"Unable to claim ACPI GPE %d, running polled\n",
io->irq);
io->irq = 0;
return -EINVAL;
} else {
io->irq_cleanup = acpi_gpe_irq_cleanup;
ipmi_irq_finish_setup(io);
dev_info(io->dev, "Using ACPI GPE %d\n", io->irq);
return 0;
}
}
/*
* Defined at
* http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
*/
struct SPMITable {
s8 Signature[4];
u32 Length;
u8 Revision;
u8 Checksum;
s8 OEMID[6];
s8 OEMTableID[8];
s8 OEMRevision[4];
s8 CreatorID[4];
s8 CreatorRevision[4];
u8 InterfaceType;
u8 IPMIlegacy;
s16 SpecificationRevision;
/*
* Bit 0 - SCI interrupt supported
* Bit 1 - I/O APIC/SAPIC
*/
u8 InterruptType;
/*
* If bit 0 of InterruptType is set, then this is the SCI
* interrupt in the GPEx_STS register.
*/
u8 GPE;
s16 Reserved;
/*
* If bit 1 of InterruptType is set, then this is the I/O
* APIC/SAPIC interrupt.
*/
u32 GlobalSystemInterrupt;
/* The actual register address. */
struct acpi_generic_address addr;
u8 UID[4];
s8 spmi_id[1]; /* A '\0' terminated array starts here. */
};
static int try_init_spmi(struct SPMITable *spmi)
{
struct si_sm_io io;
if (spmi->IPMIlegacy != 1) {
pr_info(PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
return -ENODEV;
}
memset(&io, 0, sizeof(io));
io.addr_source = SI_SPMI;
pr_info(PFX "probing via SPMI\n");
/* Figure out the interface type. */
switch (spmi->InterfaceType) {
case 1: /* KCS */
io.si_type = SI_KCS;
break;
case 2: /* SMIC */
io.si_type = SI_SMIC;
break;
case 3: /* BT */
io.si_type = SI_BT;
break;
case 4: /* SSIF, just ignore */
return -EIO;
default:
pr_info(PFX "Unknown ACPI/SPMI SI type %d\n",
spmi->InterfaceType);
return -EIO;
}
if (spmi->InterruptType & 1) {
/* We've got a GPE interrupt. */
io.irq = spmi->GPE;
io.irq_setup = acpi_gpe_irq_setup;
} else if (spmi->InterruptType & 2) {
/* We've got an APIC/SAPIC interrupt. */
io.irq = spmi->GlobalSystemInterrupt;
io.irq_setup = ipmi_std_irq_setup;
} else {
/* Use the default interrupt setting. */
io.irq = 0;
io.irq_setup = NULL;
}
if (spmi->addr.bit_width) {
/* A (hopefully) properly formed register bit width. */
io.regspacing = spmi->addr.bit_width / 8;
} else {
io.regspacing = DEFAULT_REGSPACING;
}
io.regsize = io.regspacing;
io.regshift = spmi->addr.bit_offset;
if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
io.addr_type = IPMI_MEM_ADDR_SPACE;
} else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
io.addr_type = IPMI_IO_ADDR_SPACE;
} else {
pr_warn(PFX "Unknown ACPI I/O Address type\n");
return -EIO;
}
io.addr_data = spmi->addr.address;
pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
(io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
io.addr_data, io.regsize, io.regspacing, io.irq);
return ipmi_si_add_smi(&io);
}
static void spmi_find_bmc(void)
{
acpi_status status;
struct SPMITable *spmi;
int i;
if (acpi_disabled)
return;
if (acpi_failure)
return;
for (i = 0; ; i++) {
status = acpi_get_table(ACPI_SIG_SPMI, i+1,
(struct acpi_table_header **)&spmi);
if (status != AE_OK)
return;
try_init_spmi(spmi);
}
}
#endif
#if defined(CONFIG_DMI) || defined(CONFIG_ACPI)
static struct resource *
ipmi_get_info_from_resources(struct platform_device *pdev,
struct si_sm_io *io)
{
struct resource *res, *res_second;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res) {
io->addr_type = IPMI_IO_ADDR_SPACE;
} else {
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res)
io->addr_type = IPMI_MEM_ADDR_SPACE;
}
if (!res) {
dev_err(&pdev->dev, "no I/O or memory address\n");
return NULL;
}
io->addr_data = res->start;
io->regspacing = DEFAULT_REGSPACING;
res_second = platform_get_resource(pdev,
(io->addr_type == IPMI_IO_ADDR_SPACE) ?
IORESOURCE_IO : IORESOURCE_MEM,
1);
if (res_second) {
if (res_second->start > io->addr_data)
io->regspacing = res_second->start - io->addr_data;
}
io->regsize = DEFAULT_REGSIZE;
io->regshift = 0;
return res;
}
#endif
#ifdef CONFIG_DMI
static int dmi_ipmi_probe(struct platform_device *pdev)
{
struct si_sm_io io;
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;
memset(&io, 0, sizeof(io));
io.addr_source = SI_SMBIOS;
pr_info(PFX "probing via SMBIOS\n");
switch (type) {
case IPMI_DMI_TYPE_KCS:
io.si_type = SI_KCS;
break;
case IPMI_DMI_TYPE_SMIC:
io.si_type = SI_SMIC;
break;
case IPMI_DMI_TYPE_BT:
io.si_type = SI_BT;
break;
default:
return -EINVAL;
}
if (!ipmi_get_info_from_resources(pdev, &io)) {
rv = -EINVAL;
goto err_free;
}
rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
if (rv) {
dev_warn(&pdev->dev, "device has no slave-addr property");
io.slave_addr = 0x20;
} else {
io.slave_addr = slave_addr;
}
io.irq = platform_get_irq(pdev, 0);
if (io.irq > 0)
io.irq_setup = ipmi_std_irq_setup;
else
io.irq = 0;
io.dev = &pdev->dev;
pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
(io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
io.addr_data, io.regsize, io.regspacing, io.irq);
ipmi_si_add_smi(&io);
return 0;
err_free:
return rv;
}
#else
static int dmi_ipmi_probe(struct platform_device *pdev)
{
return -ENODEV;
}
#endif /* CONFIG_DMI */
#ifdef CONFIG_OF
static const struct of_device_id of_ipmi_match[] = {
{ .type = "ipmi", .compatible = "ipmi-kcs",
.data = (void *)(unsigned long) SI_KCS },
{ .type = "ipmi", .compatible = "ipmi-smic",
.data = (void *)(unsigned long) SI_SMIC },
{ .type = "ipmi", .compatible = "ipmi-bt",
.data = (void *)(unsigned long) SI_BT },
{},
};
MODULE_DEVICE_TABLE(of, of_ipmi_match);
static int of_ipmi_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct si_sm_io io;
struct resource resource;
const __be32 *regsize, *regspacing, *regshift;
struct device_node *np = pdev->dev.of_node;
int ret;
int proplen;
dev_info(&pdev->dev, "probing via device tree\n");
match = of_match_device(of_ipmi_match, &pdev->dev);
if (!match)
return -ENODEV;
if (!of_device_is_available(np))
return -EINVAL;
ret = of_address_to_resource(np, 0, &resource);
if (ret) {
dev_warn(&pdev->dev, PFX "invalid address from OF\n");
return ret;
}
regsize = of_get_property(np, "reg-size", &proplen);
if (regsize && proplen != 4) {
dev_warn(&pdev->dev, PFX "invalid regsize from OF\n");
return -EINVAL;
}
regspacing = of_get_property(np, "reg-spacing", &proplen);
if (regspacing && proplen != 4) {
dev_warn(&pdev->dev, PFX "invalid regspacing from OF\n");
return -EINVAL;
}
regshift = of_get_property(np, "reg-shift", &proplen);
if (regshift && proplen != 4) {
dev_warn(&pdev->dev, PFX "invalid regshift from OF\n");
return -EINVAL;
}
memset(&io, 0, sizeof(io));
io.si_type = (enum si_type) match->data;
io.addr_source = SI_DEVICETREE;
io.irq_setup = ipmi_std_irq_setup;
if (resource.flags & IORESOURCE_IO)
io.addr_type = IPMI_IO_ADDR_SPACE;
else
io.addr_type = IPMI_MEM_ADDR_SPACE;
io.addr_data = resource.start;
io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
io.regshift = regshift ? be32_to_cpup(regshift) : 0;
io.irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
io.dev = &pdev->dev;
dev_dbg(&pdev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
io.addr_data, io.regsize, io.regspacing, io.irq);
return ipmi_si_add_smi(&io);
}
#else
#define of_ipmi_match NULL
static int of_ipmi_probe(struct platform_device *dev)
{
return -ENODEV;
}
#endif
#ifdef CONFIG_ACPI
static int find_slave_address(struct si_sm_io *io, int slave_addr)
{
#ifdef CONFIG_IPMI_DMI_DECODE
if (!slave_addr) {
int type = -1;
u32 flags = IORESOURCE_IO;
switch (io->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 (io->addr_type == IPMI_MEM_ADDR_SPACE)
flags = IORESOURCE_MEM;
slave_addr = ipmi_dmi_get_slave_addr(type, flags,
io->addr_data);
}
#endif
return slave_addr;
}
static int acpi_ipmi_probe(struct platform_device *pdev)
{
struct si_sm_io io;
acpi_handle handle;
acpi_status status;
unsigned long long tmp;
struct resource *res;
int rv = -EINVAL;
if (!si_tryacpi)
return -ENODEV;
handle = ACPI_HANDLE(&pdev->dev);
if (!handle)
return -ENODEV;
memset(&io, 0, sizeof(io));
io.addr_source = SI_ACPI;
dev_info(&pdev->dev, PFX "probing via ACPI\n");
io.addr_info.acpi_info.acpi_handle = handle;
/* _IFT tells us the interface type: KCS, BT, etc */
status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
if (ACPI_FAILURE(status)) {
dev_err(&pdev->dev,
"Could not find ACPI IPMI interface type\n");
goto err_free;
}
switch (tmp) {
case 1:
io.si_type = SI_KCS;
break;
case 2:
io.si_type = SI_SMIC;
break;
case 3:
io.si_type = SI_BT;
break;
case 4: /* SSIF, just ignore */
rv = -ENODEV;
goto err_free;
default:
dev_info(&pdev->dev, "unknown IPMI type %lld\n", tmp);
goto err_free;
}
res = ipmi_get_info_from_resources(pdev, &io);
if (!res) {
rv = -EINVAL;
goto err_free;
}
/* If _GPE exists, use it; otherwise use standard interrupts */
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
if (ACPI_SUCCESS(status)) {
io.irq = tmp;
io.irq_setup = acpi_gpe_irq_setup;
} else {
int irq = platform_get_irq(pdev, 0);
if (irq > 0) {
io.irq = irq;
io.irq_setup = ipmi_std_irq_setup;
}
}
io.slave_addr = find_slave_address(&io, io.slave_addr);
io.dev = &pdev->dev;
dev_info(io.dev, "%pR regsize %d spacing %d irq %d\n",
res, io.regsize, io.regspacing, io.irq);
return ipmi_si_add_smi(&io);
err_free:
return rv;
}
static const struct acpi_device_id acpi_ipmi_match[] = {
{ "IPI0001", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, acpi_ipmi_match);
#else
static int acpi_ipmi_probe(struct platform_device *dev)
{
return -ENODEV;
}
#endif
static int ipmi_probe(struct platform_device *pdev)
{
if (pdev->dev.of_node && of_ipmi_probe(pdev) == 0)
return 0;
if (acpi_ipmi_probe(pdev) == 0)
return 0;
return dmi_ipmi_probe(pdev);
}
static int ipmi_remove(struct platform_device *pdev)
{
return ipmi_si_remove_by_dev(&pdev->dev);
}
struct platform_driver ipmi_platform_driver = {
.driver = {
.name = DEVICE_NAME,
.of_match_table = of_ipmi_match,
.acpi_match_table = ACPI_PTR(acpi_ipmi_match),
},
.probe = ipmi_probe,
.remove = ipmi_remove,
};
void ipmi_si_platform_init(void)
{
if (si_tryplatform) {
int rv = platform_driver_register(&ipmi_platform_driver);
if (rv)
pr_err(PFX "Unable to register driver: %d\n", rv);
}
#ifdef CONFIG_ACPI
if (si_tryacpi)
spmi_find_bmc();
#endif
}
void ipmi_si_platform_shutdown(void)
{
platform_driver_unregister(&ipmi_platform_driver);
}