diff options
| -rw-r--r-- | drivers/char/ipmi/Makefile | 2 | ||||
| -rw-r--r-- | drivers/char/ipmi/ipmi_si.h | 6 | ||||
| -rw-r--r-- | drivers/char/ipmi/ipmi_si_intf.c | 592 | ||||
| -rw-r--r-- | drivers/char/ipmi/ipmi_si_platform.c | 602 |
4 files changed, 613 insertions, 589 deletions
diff --git a/drivers/char/ipmi/Makefile b/drivers/char/ipmi/Makefile index ebd728497b23..fa3858f472ac 100644 --- a/drivers/char/ipmi/Makefile +++ b/drivers/char/ipmi/Makefile @@ -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 diff --git a/drivers/char/ipmi/ipmi_si.h b/drivers/char/ipmi/ipmi_si.h index 1dbd58afc2d7..ff9a30a1ead5 100644 --- a/drivers/char/ipmi/ipmi_si.h +++ b/drivers/char/ipmi/ipmi_si.h @@ -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; diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 58f0ebbcd342..bfc052bdbdd7 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -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) diff --git a/drivers/char/ipmi/ipmi_si_platform.c b/drivers/char/ipmi/ipmi_si_platform.c new file mode 100644 index 000000000000..cf5c3e5e72e2 --- /dev/null +++ b/drivers/char/ipmi/ipmi_si_platform.c @@ -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); +} |