From: Benjamin Herrenschmidt Date: Mon, 19 Sep 2011 17:44:57 +0000 (+0000) Subject: powerpc/powernv: Basic support for OPAL X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=14a43e69ed257a1fadadf9fea2c05adb1686419f;p=~shefty%2Frdma-dev.git powerpc/powernv: Basic support for OPAL Add definition of OPAL interfaces along with the wrappers to call into OPAL runtime and the early device-tree parsing hook to locate the OPAL runtime firmware. Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h index 3a6c586c4e4..14db29b18d0 100644 --- a/arch/powerpc/include/asm/firmware.h +++ b/arch/powerpc/include/asm/firmware.h @@ -48,6 +48,8 @@ #define FW_FEATURE_CMO ASM_CONST(0x0000000002000000) #define FW_FEATURE_VPHN ASM_CONST(0x0000000004000000) #define FW_FEATURE_XCMO ASM_CONST(0x0000000008000000) +#define FW_FEATURE_OPAL ASM_CONST(0x0000000010000000) +#define FW_FEATURE_OPALv2 ASM_CONST(0x0000000020000000) #ifndef __ASSEMBLY__ @@ -65,6 +67,8 @@ enum { FW_FEATURE_PSERIES_ALWAYS = 0, FW_FEATURE_ISERIES_POSSIBLE = FW_FEATURE_ISERIES | FW_FEATURE_LPAR, FW_FEATURE_ISERIES_ALWAYS = FW_FEATURE_ISERIES | FW_FEATURE_LPAR, + FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_OPALv2, + FW_FEATURE_POWERNV_ALWAYS = 0, FW_FEATURE_PS3_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1, FW_FEATURE_PS3_ALWAYS = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1, FW_FEATURE_CELLEB_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_BEAT, @@ -78,6 +82,9 @@ enum { #ifdef CONFIG_PPC_ISERIES FW_FEATURE_ISERIES_POSSIBLE | #endif +#ifdef CONFIG_PPC_POWERNV + FW_FEATURE_POWERNV_POSSIBLE | +#endif #ifdef CONFIG_PPC_PS3 FW_FEATURE_PS3_POSSIBLE | #endif @@ -95,6 +102,9 @@ enum { #ifdef CONFIG_PPC_ISERIES FW_FEATURE_ISERIES_ALWAYS & #endif +#ifdef CONFIG_PPC_POWERNV + FW_FEATURE_POWERNV_ALWAYS & +#endif #ifdef CONFIG_PPC_PS3 FW_FEATURE_PS3_ALWAYS & #endif diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index ecdb283f8b7..c7a3202d10a 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -37,14 +37,394 @@ extern long opal_query_takeover(u64 *hal_size, u64 *hal_align); extern long opal_do_takeover(struct opal_takeover_args *args); +struct rtas_args; extern int opal_enter_rtas(struct rtas_args *args, unsigned long data, unsigned long entry); - #endif /* __ASSEMBLY__ */ /****** OPAL APIs ******/ +/* Return codes */ +#define OPAL_SUCCESS 0 +#define OPAL_PARAMETER -1 +#define OPAL_BUSY -2 +#define OPAL_PARTIAL -3 +#define OPAL_CONSTRAINED -4 +#define OPAL_CLOSED -5 +#define OPAL_HARDWARE -6 +#define OPAL_UNSUPPORTED -7 +#define OPAL_PERMISSION -8 +#define OPAL_NO_MEM -9 +#define OPAL_RESOURCE -10 +#define OPAL_INTERNAL_ERROR -11 +#define OPAL_BUSY_EVENT -12 +#define OPAL_HARDWARE_FROZEN -13 + +/* API Tokens (in r0) */ +#define OPAL_CONSOLE_WRITE 1 +#define OPAL_CONSOLE_READ 2 +#define OPAL_RTC_READ 3 +#define OPAL_RTC_WRITE 4 +#define OPAL_CEC_POWER_DOWN 5 +#define OPAL_CEC_REBOOT 6 +#define OPAL_READ_NVRAM 7 +#define OPAL_WRITE_NVRAM 8 +#define OPAL_HANDLE_INTERRUPT 9 +#define OPAL_POLL_EVENTS 10 +#define OPAL_PCI_SET_HUB_TCE_MEMORY 11 +#define OPAL_PCI_SET_PHB_TCE_MEMORY 12 +#define OPAL_PCI_CONFIG_READ_BYTE 13 +#define OPAL_PCI_CONFIG_READ_HALF_WORD 14 +#define OPAL_PCI_CONFIG_READ_WORD 15 +#define OPAL_PCI_CONFIG_WRITE_BYTE 16 +#define OPAL_PCI_CONFIG_WRITE_HALF_WORD 17 +#define OPAL_PCI_CONFIG_WRITE_WORD 18 +#define OPAL_SET_XIVE 19 +#define OPAL_GET_XIVE 20 +#define OPAL_GET_COMPLETION_TOKEN_STATUS 21 /* obsolete */ +#define OPAL_REGISTER_OPAL_EXCEPTION_HANDLER 22 +#define OPAL_PCI_EEH_FREEZE_STATUS 23 +#define OPAL_PCI_SHPC 24 +#define OPAL_CONSOLE_WRITE_BUFFER_SPACE 25 +#define OPAL_PCI_EEH_FREEZE_CLEAR 26 +#define OPAL_PCI_PHB_MMIO_ENABLE 27 +#define OPAL_PCI_SET_PHB_MEM_WINDOW 28 +#define OPAL_PCI_MAP_PE_MMIO_WINDOW 29 +#define OPAL_PCI_SET_PHB_TABLE_MEMORY 30 +#define OPAL_PCI_SET_PE 31 +#define OPAL_PCI_SET_PELTV 32 +#define OPAL_PCI_SET_MVE 33 +#define OPAL_PCI_SET_MVE_ENABLE 34 +#define OPAL_PCI_GET_XIVE_REISSUE 35 +#define OPAL_PCI_SET_XIVE_REISSUE 36 +#define OPAL_PCI_SET_XIVE_PE 37 +#define OPAL_GET_XIVE_SOURCE 38 +#define OPAL_GET_MSI_32 39 +#define OPAL_GET_MSI_64 40 +#define OPAL_START_CPU 41 +#define OPAL_QUERY_CPU_STATUS 42 +#define OPAL_WRITE_OPPANEL 43 +#define OPAL_PCI_MAP_PE_DMA_WINDOW 44 +#define OPAL_PCI_MAP_PE_DMA_WINDOW_REAL 45 +#define OPAL_PCI_RESET 49 + +#ifndef __ASSEMBLY__ + +/* Other enums */ +enum OpalVendorApiTokens { + OPAL_START_VENDOR_API_RANGE = 1000, OPAL_END_VENDOR_API_RANGE = 1999 +}; +enum OpalFreezeState { + OPAL_EEH_STOPPED_NOT_FROZEN = 0, + OPAL_EEH_STOPPED_MMIO_FREEZE = 1, + OPAL_EEH_STOPPED_DMA_FREEZE = 2, + OPAL_EEH_STOPPED_MMIO_DMA_FREEZE = 3, + OPAL_EEH_STOPPED_RESET = 4, + OPAL_EEH_STOPPED_TEMP_UNAVAIL = 5, + OPAL_EEH_STOPPED_PERM_UNAVAIL = 6 +}; +enum OpalEehFreezeActionToken { + OPAL_EEH_ACTION_CLEAR_FREEZE_MMIO = 1, + OPAL_EEH_ACTION_CLEAR_FREEZE_DMA = 2, + OPAL_EEH_ACTION_CLEAR_FREEZE_ALL = 3 +}; +enum OpalPciStatusToken { + OPAL_EEH_PHB_NO_ERROR = 0, + OPAL_EEH_PHB_FATAL = 1, + OPAL_EEH_PHB_RECOVERABLE = 2, + OPAL_EEH_PHB_BUS_ERROR = 3, + OPAL_EEH_PCI_NO_DEVSEL = 4, + OPAL_EEH_PCI_TA = 5, + OPAL_EEH_PCIEX_UR = 6, + OPAL_EEH_PCIEX_CA = 7, + OPAL_EEH_PCI_MMIO_ERROR = 8, + OPAL_EEH_PCI_DMA_ERROR = 9 +}; +enum OpalShpcAction { + OPAL_SHPC_GET_LINK_STATE = 0, + OPAL_SHPC_GET_SLOT_STATE = 1 +}; +enum OpalShpcLinkState { + OPAL_SHPC_LINK_DOWN = 0, + OPAL_SHPC_LINK_UP = 1 +}; +enum OpalMmioWindowType { + OPAL_M32_WINDOW_TYPE = 1, + OPAL_M64_WINDOW_TYPE = 2, + OPAL_IO_WINDOW_TYPE = 3 +}; +enum OpalShpcSlotState { + OPAL_SHPC_DEV_NOT_PRESENT = 0, + OPAL_SHPC_DEV_PRESENT = 1 +}; +enum OpalExceptionHandler { + OPAL_MACHINE_CHECK_HANDLER = 1, + OPAL_HYPERVISOR_MAINTENANCE_HANDLER = 2, + OPAL_SOFTPATCH_HANDLER = 3 +}; +enum OpalPendingState { + OPAL_EVENT_OPAL_INTERNAL = 0x1, + OPAL_EVENT_NVRAM = 0x2, + OPAL_EVENT_RTC = 0x4, + OPAL_EVENT_CONSOLE_OUTPUT = 0x8, + OPAL_EVENT_CONSOLE_INPUT = 0x10 +}; + +/* Machine check related definitions */ +enum OpalMCE_Version { + OpalMCE_V1 = 1, +}; + +enum OpalMCE_Severity { + OpalMCE_SEV_NO_ERROR = 0, + OpalMCE_SEV_WARNING = 1, + OpalMCE_SEV_ERROR_SYNC = 2, + OpalMCE_SEV_FATAL = 3, +}; + +enum OpalMCE_Disposition { + OpalMCE_DISPOSITION_RECOVERED = 0, + OpalMCE_DISPOSITION_NOT_RECOVERED = 1, +}; + +enum OpalMCE_Initiator { + OpalMCE_INITIATOR_UNKNOWN = 0, + OpalMCE_INITIATOR_CPU = 1, +}; + +enum OpalMCE_ErrorType { + OpalMCE_ERROR_TYPE_UNKNOWN = 0, + OpalMCE_ERROR_TYPE_UE = 1, + OpalMCE_ERROR_TYPE_SLB = 2, + OpalMCE_ERROR_TYPE_ERAT = 3, + OpalMCE_ERROR_TYPE_TLB = 4, +}; + +enum OpalMCE_UeErrorType { + OpalMCE_UE_ERROR_INDETERMINATE = 0, + OpalMCE_UE_ERROR_IFETCH = 1, + OpalMCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH = 2, + OpalMCE_UE_ERROR_LOAD_STORE = 3, + OpalMCE_UE_ERROR_PAGE_TABLE_WALK_LOAD_STORE = 4, +}; + +enum OpalMCE_SlbErrorType { + OpalMCE_SLB_ERROR_INDETERMINATE = 0, + OpalMCE_SLB_ERROR_PARITY = 1, + OpalMCE_SLB_ERROR_MULTIHIT = 2, +}; + +enum OpalMCE_EratErrorType { + OpalMCE_ERAT_ERROR_INDETERMINATE = 0, + OpalMCE_ERAT_ERROR_PARITY = 1, + OpalMCE_ERAT_ERROR_MULTIHIT = 2, +}; + +enum OpalMCE_TlbErrorType { + OpalMCE_TLB_ERROR_INDETERMINATE = 0, + OpalMCE_TLB_ERROR_PARITY = 1, + OpalMCE_TLB_ERROR_MULTIHIT = 2, +}; + +enum OpalThreadStatus { + OPAL_THREAD_INACTIVE = 0x0, + OPAL_THREAD_STARTED = 0x1 +}; + +enum OpalPciBusCompare { + OpalPciBusAny = 0, /* Any bus number match */ + OpalPciBus3Bits = 2, /* Match top 3 bits of bus number */ + OpalPciBus4Bits = 3, /* Match top 4 bits of bus number */ + OpalPciBus5Bits = 4, /* Match top 5 bits of bus number */ + OpalPciBus6Bits = 5, /* Match top 6 bits of bus number */ + OpalPciBus7Bits = 6, /* Match top 7 bits of bus number */ + OpalPciBusAll = 7, /* Match bus number exactly */ +}; + +enum OpalDeviceCompare { + OPAL_IGNORE_RID_DEVICE_NUMBER = 0, + OPAL_COMPARE_RID_DEVICE_NUMBER = 1 +}; + +enum OpalFuncCompare { + OPAL_IGNORE_RID_FUNCTION_NUMBER = 0, + OPAL_COMPARE_RID_FUNCTION_NUMBER = 1 +}; + +enum OpalPeAction { + OPAL_UNMAP_PE = 0, + OPAL_MAP_PE = 1 +}; + +enum OpalPciResetAndReinitScope { + OPAL_PHB_COMPLETE = 1, OPAL_PCI_LINK = 2, OPAL_PHB_ERROR = 3, + OPAL_PCI_HOT_RESET = 4, OPAL_PCI_FUNDAMENTAL_RESET = 5, + OPAL_PCI_IODA_RESET = 6, +}; + +enum OpalPciResetState { OPAL_DEASSERT_RESET = 0, OPAL_ASSERT_RESET = 1 }; + +struct opal_machine_check_event { + enum OpalMCE_Version version:8; /* 0x00 */ + uint8_t in_use; /* 0x01 */ + enum OpalMCE_Severity severity:8; /* 0x02 */ + enum OpalMCE_Initiator initiator:8; /* 0x03 */ + enum OpalMCE_ErrorType error_type:8; /* 0x04 */ + enum OpalMCE_Disposition disposition:8; /* 0x05 */ + uint8_t reserved_1[2]; /* 0x06 */ + uint64_t gpr3; /* 0x08 */ + uint64_t srr0; /* 0x10 */ + uint64_t srr1; /* 0x18 */ + union { /* 0x20 */ + struct { + enum OpalMCE_UeErrorType ue_error_type:8; + uint8_t effective_address_provided; + uint8_t physical_address_provided; + uint8_t reserved_1[5]; + uint64_t effective_address; + uint64_t physical_address; + uint8_t reserved_2[8]; + } ue_error; + + struct { + enum OpalMCE_SlbErrorType slb_error_type:8; + uint8_t effective_address_provided; + uint8_t reserved_1[6]; + uint64_t effective_address; + uint8_t reserved_2[16]; + } slb_error; + + struct { + enum OpalMCE_EratErrorType erat_error_type:8; + uint8_t effective_address_provided; + uint8_t reserved_1[6]; + uint64_t effective_address; + uint8_t reserved_2[16]; + } erat_error; + + struct { + enum OpalMCE_TlbErrorType tlb_error_type:8; + uint8_t effective_address_provided; + uint8_t reserved_1[6]; + uint64_t effective_address; + uint8_t reserved_2[16]; + } tlb_error; + } u; +}; + +typedef struct oppanel_line { + /* XXX */ +} oppanel_line_t; + +/* API functions */ +int64_t opal_console_write(int64_t term_number, int64_t *length, + const uint8_t *buffer); +int64_t opal_console_read(int64_t term_number, int64_t *length, + uint8_t *buffer); +int64_t opal_console_write_buffer_space(int64_t term_number, + int64_t *length); +int64_t opal_rtc_read(uint32_t *year_month_day, + uint64_t *hour_minute_second_millisecond); +int64_t opal_rtc_write(uint32_t year_month_day, + uint64_t hour_minute_second_millisecond); +int64_t opal_cec_power_down(uint64_t request); +int64_t opal_cec_reboot(void); +int64_t opal_read_nvram(uint64_t buffer, uint64_t size, uint64_t offset); +int64_t opal_write_nvram(uint64_t buffer, uint64_t size, uint64_t offset); +int64_t opal_handle_interrupt(uint64_t isn, uint64_t *outstanding_event_mask); +int64_t opal_poll_events(uint64_t *outstanding_event_mask); +int64_t opal_pci_set_hub_tce_memory(uint64_t hub_id, uint64_t tce_mem_addr, + uint64_t tce_mem_size); +int64_t opal_pci_set_phb_tce_memory(uint64_t phb_id, uint64_t tce_mem_addr, + uint64_t tce_mem_size); +int64_t opal_pci_config_read_byte(uint64_t phb_id, uint64_t bus_dev_func, + uint64_t offset, uint8_t *data); +int64_t opal_pci_config_read_half_word(uint64_t phb_id, uint64_t bus_dev_func, + uint64_t offset, uint16_t *data); +int64_t opal_pci_config_read_word(uint64_t phb_id, uint64_t bus_dev_func, + uint64_t offset, uint32_t *data); +int64_t opal_pci_config_write_byte(uint64_t phb_id, uint64_t bus_dev_func, + uint64_t offset, uint8_t data); +int64_t opal_pci_config_write_half_word(uint64_t phb_id, uint64_t bus_dev_func, + uint64_t offset, uint16_t data); +int64_t opal_pci_config_write_word(uint64_t phb_id, uint64_t bus_dev_func, + uint64_t offset, uint32_t data); +int64_t opal_set_xive(uint32_t isn, uint16_t server, uint8_t priority); +int64_t opal_get_xive(uint32_t isn, uint16_t *server, uint8_t *priority); +int64_t opal_register_exception_handler(uint64_t opal_exception, + uint64_t handler_address, + uint64_t glue_cache_line); +int64_t opal_pci_eeh_freeze_status(uint64_t phb_id, uint64_t pe_number, + uint8_t *freeze_state, + uint16_t *pci_error_type, + uint64_t *phb_status); +int64_t opal_pci_eeh_freeze_clear(uint64_t phb_id, uint64_t pe_number, + uint64_t eeh_action_token); +int64_t opal_pci_shpc(uint64_t phb_id, uint64_t shpc_action, uint8_t *state); + + + +int64_t opal_pci_phb_mmio_enable(uint64_t phb_id, uint16_t window_type, + uint16_t window_num, uint16_t enable); +int64_t opal_pci_set_phb_mem_window(uint64_t phb_id, uint16_t window_type, + uint16_t window_num, + uint64_t starting_real_address, + uint64_t starting_pci_address, + uint16_t segment_size); +int64_t opal_pci_map_pe_mmio_window(uint64_t phb_id, uint16_t pe_number, + uint16_t window_type, uint16_t window_num, + uint16_t segment_num); +int64_t opal_pci_set_phb_table_memory(uint64_t phb_id, uint64_t rtt_addr, + uint64_t ivt_addr, uint64_t ivt_len, + uint64_t reject_array_addr, + uint64_t peltv_addr); +int64_t opal_pci_set_pe(uint64_t phb_id, uint64_t pe_number, uint64_t bus_dev_func, + uint8_t bus_compare, uint8_t dev_compare, uint8_t func_compare, + uint8_t pe_action); +int64_t opal_pci_set_peltv(uint64_t phb_id, uint32_t parent_pe, uint32_t child_pe, + uint8_t state); +int64_t opal_pci_set_mve(uint64_t phb_id, uint32_t mve_number, uint32_t pe_number); +int64_t opal_pci_set_mve_enable(uint64_t phb_id, uint32_t mve_number, + uint32_t state); +int64_t opal_pci_get_xive_reissue(uint64_t phb_id, uint32_t xive_number, + uint8_t *p_bit, uint8_t *q_bit); +int64_t opal_pci_set_xive_reissue(uint64_t phb_id, uint32_t xive_number, + uint8_t p_bit, uint8_t q_bit); +int64_t opal_pci_set_xive_pe(uint64_t phb_id, uint32_t pe_number, + uint32_t xive_num); +int64_t opal_get_xive_source(uint64_t phb_id, uint32_t xive_num, + int32_t *interrupt_source_number); +int64_t opal_get_msi_32(uint64_t phb_id, uint32_t mve_number, uint32_t xive_num, + uint8_t msi_range, uint32_t *msi_address, + uint32_t *message_data); +int64_t opal_get_msi_64(uint64_t phb_id, uint32_t mve_number, + uint32_t xive_num, uint8_t msi_range, + uint64_t *msi_address, uint32_t *message_data); +int64_t opal_start_cpu(uint64_t thread_number, uint64_t start_address); +int64_t opal_query_cpu_status(uint64_t thread_number, uint8_t *thread_status); +int64_t opal_write_oppanel(oppanel_line_t *lines, uint64_t num_lines); +int64_t opal_pci_map_pe_dma_window(uint64_t phb_id, uint16_t pe_number, uint16_t window_id, + uint16_t tce_levels, uint64_t tce_table_addr, + uint64_t tce_table_size, uint64_t tce_page_size); +int64_t opal_pci_map_pe_dma_window_real(uint64_t phb_id, uint16_t pe_number, + uint16_t dma_window_number, uint64_t pci_start_addr, + uint64_t pci_mem_size); +int64_t opal_pci_reset(uint64_t phb_id, uint8_t reset_scope, uint8_t assert_state); + +/* Internal functions */ +extern int early_init_dt_scan_opal(unsigned long node, const char *uname, int depth, void *data); + +extern int opal_get_chars(uint32_t vtermno, char *buf, int count); +extern int opal_put_chars(uint32_t vtermno, const char *buf, int total_len); + +extern void hvc_opal_init_early(void); + +/* Internal functions */ +extern int early_init_dt_scan_opal(unsigned long node, const char *uname, + int depth, void *data); + +#endif /* __ASSEMBLY__ */ #endif /* __OPAL_H */ diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 7b90c564e93..831a201e03d 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -54,6 +54,8 @@ #include #include #include +#include + #include #ifdef DEBUG @@ -707,6 +709,11 @@ void __init early_init_devtree(void *params) of_scan_flat_dt(early_init_dt_scan_rtas, NULL); #endif +#ifdef CONFIG_PPC_POWERNV + /* Some machines might need OPAL info for debugging, grab it now. */ + of_scan_flat_dt(early_init_dt_scan_opal, NULL); +#endif + #ifdef CONFIG_PHYP_DUMP /* scan tree to see if dump occurred during last boot */ of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL); diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig index 24700e8df19..74fea5c2183 100644 --- a/arch/powerpc/platforms/powernv/Kconfig +++ b/arch/powerpc/platforms/powernv/Kconfig @@ -1,11 +1,16 @@ config PPC_POWERNV depends on PPC64 && PPC_BOOK3S bool "IBM PowerNV (Non-Virtualized) platform support" - select PPC_RTAS select PPC_NATIVE select PPC_XICS select PPC_ICP_NATIVE - select PPC_ICS_RTAS select PPC_P7_NAP select PPC_PCI_CHOICE if EMBEDDED default y + +config PPC_POWERNV_RTAS + depends on PPC_POWERNV + bool "Support for RTAS based PowerNV platforms such as BML" + default y + select PPC_ICS_RTAS + select PPC_RTAS diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile index 497133027ae..8f69c0db612 100644 --- a/arch/powerpc/platforms/powernv/Makefile +++ b/arch/powerpc/platforms/powernv/Makefile @@ -1,2 +1,2 @@ -obj-y += setup.o opal-takeover.o +obj-y += setup.o opal-takeover.o opal-wrappers.o opal.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S new file mode 100644 index 00000000000..4a3f46d8533 --- /dev/null +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -0,0 +1,101 @@ +/* + * PowerNV OPAL API wrappers + * + * Copyright 2011 IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include +#include +#include +#include + +/* TODO: + * + * - Trace irqs in/off (needs saving/restoring all args, argh...) + * - Get r11 feed up by Dave so I can have better register usage + */ +#define OPAL_CALL(name, token) \ + _GLOBAL(name); \ + mflr r0; \ + mfcr r12; \ + std r0,16(r1); \ + std r12,8(r1); \ + std r1,PACAR1(r13); \ + li r0,0; \ + mfmsr r12; \ + ori r0,r0,MSR_EE; \ + std r12,PACASAVEDMSR(r13); \ + andc r12,r12,r0; \ + mtmsrd r12,1; \ + LOAD_REG_ADDR(r0,.opal_return); \ + mtlr r0; \ + li r0,MSR_DR|MSR_IR; \ + andc r12,r12,r0; \ + li r0,token; \ + mtspr SPRN_HSRR1,r12; \ + LOAD_REG_ADDR(r11,opal); \ + ld r12,8(r11); \ + ld r2,0(r11); \ + mtspr SPRN_HSRR0,r12; \ + hrfid + +_STATIC(opal_return) + ld r2,PACATOC(r13); + ld r4,8(r1); + ld r5,16(r1); + ld r6,PACASAVEDMSR(r13); + mtspr SPRN_SRR0,r5; + mtspr SPRN_SRR1,r6; + mtcr r4; + rfid + +OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE); +OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ); +OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE); +OPAL_CALL(opal_rtc_read, OPAL_RTC_READ); +OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE); +OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN); +OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT); +OPAL_CALL(opal_read_nvram, OPAL_READ_NVRAM); +OPAL_CALL(opal_write_nvram, OPAL_WRITE_NVRAM); +OPAL_CALL(opal_handle_interrupt, OPAL_HANDLE_INTERRUPT); +OPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS); +OPAL_CALL(opal_pci_set_hub_tce_memory, OPAL_PCI_SET_HUB_TCE_MEMORY); +OPAL_CALL(opal_pci_set_phb_tce_memory, OPAL_PCI_SET_PHB_TCE_MEMORY); +OPAL_CALL(opal_pci_config_read_byte, OPAL_PCI_CONFIG_READ_BYTE); +OPAL_CALL(opal_pci_config_read_half_word, OPAL_PCI_CONFIG_READ_HALF_WORD); +OPAL_CALL(opal_pci_config_read_word, OPAL_PCI_CONFIG_READ_WORD); +OPAL_CALL(opal_pci_config_write_byte, OPAL_PCI_CONFIG_WRITE_BYTE); +OPAL_CALL(opal_pci_config_write_half_word, OPAL_PCI_CONFIG_WRITE_HALF_WORD); +OPAL_CALL(opal_pci_config_write_word, OPAL_PCI_CONFIG_WRITE_WORD); +OPAL_CALL(opal_set_xive, OPAL_SET_XIVE); +OPAL_CALL(opal_get_xive, OPAL_GET_XIVE); +OPAL_CALL(opal_register_exception_handler, OPAL_REGISTER_OPAL_EXCEPTION_HANDLER); +OPAL_CALL(opal_pci_eeh_freeze_status, OPAL_PCI_EEH_FREEZE_STATUS); +OPAL_CALL(opal_pci_eeh_freeze_clear, OPAL_PCI_EEH_FREEZE_CLEAR); +OPAL_CALL(opal_pci_shpc, OPAL_PCI_SHPC); +OPAL_CALL(opal_pci_phb_mmio_enable, OPAL_PCI_PHB_MMIO_ENABLE); +OPAL_CALL(opal_pci_set_phb_mem_window, OPAL_PCI_SET_PHB_MEM_WINDOW); +OPAL_CALL(opal_pci_map_pe_mmio_window, OPAL_PCI_MAP_PE_MMIO_WINDOW); +OPAL_CALL(opal_pci_set_phb_table_memory, OPAL_PCI_SET_PHB_TABLE_MEMORY); +OPAL_CALL(opal_pci_set_pe, OPAL_PCI_SET_PE); +OPAL_CALL(opal_pci_set_peltv, OPAL_PCI_SET_PELTV); +OPAL_CALL(opal_pci_set_mve, OPAL_PCI_SET_MVE); +OPAL_CALL(opal_pci_set_mve_enable, OPAL_PCI_SET_MVE_ENABLE); +OPAL_CALL(opal_pci_get_xive_reissue, OPAL_PCI_GET_XIVE_REISSUE); +OPAL_CALL(opal_pci_set_xive_reissue, OPAL_PCI_SET_XIVE_REISSUE); +OPAL_CALL(opal_pci_set_xive_pe, OPAL_PCI_SET_XIVE_PE); +OPAL_CALL(opal_get_xive_source, OPAL_GET_XIVE_SOURCE); +OPAL_CALL(opal_get_msi_32, OPAL_GET_MSI_32); +OPAL_CALL(opal_get_msi_64, OPAL_GET_MSI_64); +OPAL_CALL(opal_start_cpu, OPAL_START_CPU); +OPAL_CALL(opal_query_cpu_status, OPAL_QUERY_CPU_STATUS); +OPAL_CALL(opal_write_oppanel, OPAL_WRITE_OPPANEL); +OPAL_CALL(opal_pci_map_pe_dma_window, OPAL_PCI_MAP_PE_DMA_WINDOW); +OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL); +OPAL_CALL(opal_pci_reset, OPAL_PCI_RESET); diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c new file mode 100644 index 00000000000..8d5510784cc --- /dev/null +++ b/arch/powerpc/platforms/powernv/opal.c @@ -0,0 +1,154 @@ +/* + * PowerNV OPAL high level interfaces + * + * Copyright 2011 IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#undef DEBUG + +#include +#include +#include +#include +#include + +#include "powernv.h" + +struct opal { + u64 base; + u64 entry; +} opal; + +static struct device_node *opal_node; +static DEFINE_SPINLOCK(opal_write_lock); + +int __init early_init_dt_scan_opal(unsigned long node, + const char *uname, int depth, void *data) +{ + const void *basep, *entryp; + unsigned long basesz, entrysz; + + if (depth != 1 || strcmp(uname, "ibm,opal") != 0) + return 0; + + basep = of_get_flat_dt_prop(node, "opal-base-address", &basesz); + entryp = of_get_flat_dt_prop(node, "opal-entry-address", &entrysz); + + if (!basep || !entryp) + return 1; + + opal.base = of_read_number(basep, basesz/4); + opal.entry = of_read_number(entryp, entrysz/4); + + pr_debug("OPAL Base = 0x%llx (basep=%p basesz=%ld)\n", + opal.base, basep, basesz); + pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%ld)\n", + opal.entry, entryp, entrysz); + + powerpc_firmware_features |= FW_FEATURE_OPAL; + if (of_flat_dt_is_compatible(node, "ibm,opal-v2")) { + powerpc_firmware_features |= FW_FEATURE_OPALv2; + printk("OPAL V2 detected !\n"); + } else { + printk("OPAL V1 detected !\n"); + } + + return 1; +} + +int opal_get_chars(uint32_t vtermno, char *buf, int count) +{ + s64 len, rc; + u64 evt; + + if (!opal.entry) + return 0; + opal_poll_events(&evt); + if ((evt & OPAL_EVENT_CONSOLE_INPUT) == 0) + return 0; + len = count; + rc = opal_console_read(vtermno, &len, buf); + if (rc == OPAL_SUCCESS) + return len; + return 0; +} + +int opal_put_chars(uint32_t vtermno, const char *data, int total_len) +{ + int written = 0; + s64 len, rc = OPAL_BUSY; + unsigned long flags; + u64 evt; + + if (!opal.entry) + return 0; + + /* We want put_chars to be atomic to avoid mangling of hvsi + * packets. To do that, we first test for room and return + * -EAGAIN if there isn't enough + */ + spin_lock_irqsave(&opal_write_lock, flags); + rc = opal_console_write_buffer_space(vtermno, &len); + if (rc || len < total_len) { + spin_unlock_irqrestore(&opal_write_lock, flags); + /* Closed -> drop characters */ + if (rc) + return total_len; + opal_poll_events(&evt); + return -EAGAIN; + } + + /* We still try to handle partial completions, though they + * should no longer happen. + */ + while(total_len > 0 && (rc == OPAL_BUSY || + rc == OPAL_BUSY_EVENT || rc == OPAL_SUCCESS)) { + len = total_len; + rc = opal_console_write(vtermno, &len, data); + if (rc == OPAL_SUCCESS) { + total_len -= len; + data += len; + written += len; + } + /* This is a bit nasty but we need that for the console to + * flush when there aren't any interrupts. We will clean + * things a bit later to limit that to synchronous path + * such as the kernel console and xmon/udbg + */ + do + opal_poll_events(&evt); + while(rc == OPAL_SUCCESS && (evt & OPAL_EVENT_CONSOLE_OUTPUT)); + } + spin_unlock_irqrestore(&opal_write_lock, flags); + return written; +} + +static int __init opal_init(void) +{ + struct device_node *np, *consoles; + + opal_node = of_find_node_by_path("/ibm,opal"); + if (!opal_node) { + pr_warn("opal: Node not found\n"); + return -ENODEV; + } + if (firmware_has_feature(FW_FEATURE_OPALv2)) + consoles = of_find_node_by_path("/ibm,opal/consoles"); + else + consoles = of_node_get(opal_node); + + /* Register serial ports */ + for_each_child_of_node(consoles, np) { + if (strcmp(np->name, "serial")) + continue; + of_platform_device_create(np, NULL, NULL); + } + of_node_put(consoles); + return 0; +} +subsys_initcall(opal_init); diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 569f9cc4eb0..b6e5ff85cc6 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -74,6 +74,12 @@ static void pnv_show_cpuinfo(struct seq_file *m) if (root) model = of_get_property(root, "model", NULL); seq_printf(m, "machine\t\t: PowerNV %s\n", model); + if (firmware_has_feature(FW_FEATURE_OPALv2)) + seq_printf(m, "firmware\t: OPAL v2\n"); + else if (firmware_has_feature(FW_FEATURE_OPAL)) + seq_printf(m, "firmware\t: OPAL v1\n"); + else + seq_printf(m, "firmware\t: BML\n"); of_node_put(root); } diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c index 4f4ec3797eb..e8773668524 100644 --- a/arch/powerpc/platforms/powernv/smp.c +++ b/arch/powerpc/platforms/powernv/smp.c @@ -30,6 +30,7 @@ #include #include #include +#include #include "powernv.h" @@ -62,6 +63,28 @@ static int pnv_smp_cpu_bootable(unsigned int nr) return 1; } +int __devinit pnv_smp_kick_cpu(int nr) +{ + unsigned int pcpu = get_hard_smp_processor_id(nr); + unsigned long start_here = __pa(*((unsigned long *) + generic_secondary_smp_init)); + long rc; + + BUG_ON(nr < 0 || nr >= NR_CPUS); + + /* On OPAL v2 the CPU are still spinning inside OPAL itself, + * get them back now + */ + if (firmware_has_feature(FW_FEATURE_OPALv2)) { + pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n", nr, pcpu); + rc = opal_start_cpu(pcpu, start_here); + if (rc != OPAL_SUCCESS) + pr_warn("OPAL Error %ld starting CPU %d\n", + rc, nr); + } + return smp_generic_kick_cpu(nr); +} + #ifdef CONFIG_HOTPLUG_CPU static int pnv_smp_cpu_disable(void) @@ -127,7 +150,7 @@ static struct smp_ops_t pnv_smp_ops = { .message_pass = smp_muxed_ipi_message_pass, .cause_ipi = NULL, /* Filled at runtime by xics_smp_probe() */ .probe = xics_smp_probe, - .kick_cpu = smp_generic_kick_cpu, + .kick_cpu = pnv_smp_kick_cpu, .setup_cpu = pnv_smp_setup_cpu, .cpu_bootable = pnv_smp_cpu_bootable, #ifdef CONFIG_HOTPLUG_CPU