diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-core/interfaces')
10 files changed, 948 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/.clang-format b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/.clang-format new file mode 100644 index 000000000..86a2a9d63 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/.clang-format @@ -0,0 +1,21 @@ +--- +BasedOnStyle: LLVM +Language: Cpp +IndentWidth: 8 +UseTab: Always +BreakBeforeBraces: Linux +AlwaysBreakBeforeMultilineStrings: true +AllowShortIfStatementsOnASingleLine: false +AllowShortLoopsOnASingleLine: false +AllowShortFunctionsOnASingleLine: false +IndentCaseLabels: false +AlignEscapedNewlinesLeft: false +AlignTrailingComments: true +AllowAllParametersOfDeclarationOnNextLine: false +AlignAfterOpenBracket: true +SpaceAfterCStyleCast: false +MaxEmptyLinesToKeep: 2 +BreakBeforeBinaryOperators: NonAssignment +BreakStringLiterals: false +SortIncludes: true +ContinuationIndentWidth: 8 diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/0001-Smbus-changes-for-libmctp.patch b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/0001-Smbus-changes-for-libmctp.patch new file mode 100644 index 000000000..d537b5db7 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/0001-Smbus-changes-for-libmctp.patch @@ -0,0 +1,121 @@ +From 8e3ae96546010c5d4f3fce6df9c32aece1093458 Mon Sep 17 00:00:00 2001 +From: Nikhil Potade <nikhil.potade@linux.intel.com> +Date: Tue, 19 Feb 2019 14:16:20 +0800 +Subject: [PATCH 1/1] Smbus changes for libmctp + +Signed-off-by: James Feist <james.feist@linux.intel.com> + +--- + core.c | 2 ++ + libmctp.h | 40 ++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 42 insertions(+) + +diff --git a/core.c b/core.c +index 6e59993..3b11672 100644 +--- a/core.c ++++ b/core.c +@@ -19,6 +19,7 @@ + + /* Internal data structures */ + ++/* clang-format off */ + struct mctp_bus { + mctp_eid_t eid; + struct mctp_binding *binding; +@@ -58,6 +59,7 @@ struct mctp { + ROUTE_BRIDGE, + } route_policy; + }; ++/* clang-format on */ + + #ifndef BUILD_ASSERT + #define BUILD_ASSERT(x) \ +diff --git a/libmctp.h b/libmctp.h +index 40e5371..766473b 100644 +--- a/libmctp.h ++++ b/libmctp.h +@@ -19,6 +19,7 @@ typedef uint8_t mctp_eid_t; + #define MCTP_EID_BROADCAST 0xff + + /* MCTP packet definitions */ ++/* clang-format off */ + struct mctp_hdr { + uint8_t ver; + uint8_t dest; +@@ -34,20 +35,57 @@ struct mctp_hdr { + #define MCTP_HDR_SEQ_MASK (0x3) + #define MCTP_HDR_TAG_SHIFT (0) + #define MCTP_HDR_TAG_MASK (0x7) ++/* clang-format on */ + + /* Baseline Transmission Unit and packet size */ + #define MCTP_BTU 64 + #define MCTP_PACKET_SIZE(unit) ((unit) + sizeof(struct mctp_hdr)) + #define MCTP_BODY_SIZE(unit) ((unit) - sizeof(struct mctp_hdr)) + ++#define MCTP_CONTROL_MESSAGE_TYPE 0x00 ++ ++enum MCTP_COMMAND_CODE { ++ MCTP_COMMAND_CODE_SET_EID = 0x01, ++ MCTP_COMMAND_CODE_GET_EID = 0x02, ++ MCTP_COMMAND_CODE_GET_ENDPOINT_UUID = 0x03, ++ MCTP_COMMAND_CODE_GET_MCTP_VERSION_SUPPORT = 0x04, ++ MCTP_COMMAND_CODE_GET_MESSAGE_TYPE_SUPPORT = 0x05, ++ MCTP_COMMAND_CODE_GET_VENDOR_DEFINED_MSG_SUPPORT= 0x06, ++ MCTP_COMMAND_CODE_RESOLVE_ENDPOINT_ID = 0x07, ++ MCTP_COMMAND_CODE_ALLOCATE_ENDPOINT_IDS = 0x08, ++ MCTP_COMMAND_CODE_ROUTING_INFORMATION_UPDATE = 0x09, ++ MCTP_COMMAND_CODE_GET_ROUTING_TABLE_ENTRIES = 0x0A, ++ MCTP_COMMAND_CODE_PREPARE_FOR_ENDPOINT_DISCOVERY= 0x0B, ++ MCTP_COMMAND_CODE_ENDPOINT_DISCOVERY = 0x0C, ++ MCTP_COMMAND_CODE_DISCOVERY_NOTIFY = 0x0D, ++ MCTP_COMMAND_CODE_GET_NETWORK_ID = 0x0E, ++ MCTP_COMMAND_CODE_QUERY_HOP = 0x0F, ++ MCTP_COMMAND_CODE_RESOLVE_UUID = 0x10, ++ MCTP_COMMAND_CODE_QUERY_RATE_LIMIT = 0x11, ++ MCTP_COMMAND_CODE_REQUEST_TX_RATE_LIMIT = 0x12, ++ MCTP_COMMAND_CODE_UPDATE_RATE_LIMIT = 0x13, ++ MCTP_COMMAND_CODE_QUERY_SUPPORTED_INTERFACES = 0x14 ++}; ++ ++enum MCTP_CONTROL_MSG_COMPLETION_CODE { ++ MCTP_CONTROL_MSG_STATUS_SUCCESS = 0x00, ++ MCTP_CONTROL_MSG_STATUS_ERROR = 0x01, ++ MCTP_CONTROL_MSG_STATUS_ERROR_INVALID_DATA = 0x02, ++ MCTP_CONTROL_MSG_STATUS_ERROR_INVALID_LENGTH = 0x03, ++ MCTP_CONTROL_MSG_STATUS_ERROR_NOT_READY = 0x04, ++ MCTP_CONTROL_MSG_STATUS_ERROR_UNSUPPORTED_CMD = 0x05 ++}; ++ + /* packet buffers */ + ++/* clang-format off */ + struct mctp_pktbuf { + size_t start, end, size; + size_t mctp_hdr_off; + struct mctp_pktbuf *next; + unsigned char data[]; + }; ++/* clang-format on */ + + struct mctp_binding; + +@@ -96,6 +134,7 @@ int mctp_message_tx(struct mctp *mctp, mctp_eid_t eid, + void *msg, size_t msg_len); + + /* hardware bindings */ ++/* clang-format off */ + struct mctp_binding { + const char *name; + uint8_t version; +@@ -108,6 +147,7 @@ struct mctp_binding { + mctp_rx_fn control_rx; + void *control_rx_data; + }; ++/* clang-format on */ + + void mctp_binding_set_tx_enabled(struct mctp_binding *binding, bool enable); + +-- +2.17.1 + diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/0002-Fix-Memory-Leak.patch b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/0002-Fix-Memory-Leak.patch new file mode 100644 index 000000000..52acac1ab --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/0002-Fix-Memory-Leak.patch @@ -0,0 +1,36 @@ +From bda505bc62f95ee927b75f87c52e04584dab4d79 Mon Sep 17 00:00:00 2001 +From: James Feist <james.feist@linux.intel.com> +Date: Fri, 26 Jun 2020 13:50:08 -0700 +Subject: [PATCH 1/1] Fix Memory Leak + +In mctp_send_tx_queue if rc is of an error, +the packet does not get freed, causing a leak. + +Change-Id: Ic39b0920b454608841e6e879cc028e455520e67d +Signed-off-by: James Feist <james.feist@linux.intel.com> +--- + core.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/core.c b/core.c +index 6e59993..c251b72 100644 +--- a/core.c ++++ b/core.c +@@ -543,11 +543,11 @@ static void mctp_send_tx_queue(struct mctp_bus *bus) + int rc; + + rc = mctp_packet_tx(bus, pkt); +- if (rc) +- break; +- + bus->tx_queue_head = pkt->next; + mctp_pktbuf_free(pkt); ++ ++ if (rc) ++ break; + } + + if (!bus->tx_queue_head) +-- +2.17.1 + diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/CMakeLists.txt b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/CMakeLists.txt new file mode 100644 index 000000000..28354123e --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/CMakeLists.txt @@ -0,0 +1,27 @@ +cmake_minimum_required(VERSION 3.5 FATAL_ERROR) + +add_definitions(-DMCTP_LOG_STDERR) +add_definitions(-DMCTP_HAVE_FILEIO) +add_definitions(-DMCTP_HAVE_STDIO) +add_definitions(-DMCTP_DEFAULT_ALLOC) + +add_library( + libmctp STATIC alloc.c core.c log.c libmctp.h serial.c smbus.c crc32c.c) + +target_include_directories(libmctp + PUBLIC + $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}> + $<INSTALL_INTERFACE:include/libmctp) + +enable_testing() + +add_executable(test_eid tests/test_eid.c tests/test-utils.c) +target_link_libraries(test_eid libmctp) + +add_executable(test_seq tests/test_seq.c tests/test-utils.c) +target_link_libraries(test_seq libmctp) + +install(TARGETS libmctp DESTINATION lib) +install( + FILES libmctp.h libmctp-smbus.h libmctp-serial.h crc32c.h DESTINATION include) + diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/asm/rwonce.h b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/asm/rwonce.h new file mode 100644 index 000000000..c8beb875d --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/asm/rwonce.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Prevent the compiler from merging or refetching reads or writes. The + * compiler is also forbidden from reordering successive instances of + * READ_ONCE and WRITE_ONCE, but only when the compiler is aware of some + * particular ordering. One way to make the compiler aware of ordering is to + * put the two invocations of READ_ONCE or WRITE_ONCE in different C + * statements. + * + * These two macros will also work on aggregate data types like structs or + * unions. + * + * Their two major use cases are: (1) Mediating communication between + * process-level code and irq/NMI handlers, all running on the same CPU, + * and (2) Ensuring that the compiler does not fold, spindle, or otherwise + * mutilate accesses that either do not require ordering or that interact + * with an explicit memory barrier or atomic instruction that provides the + * required ordering. + */ +#ifndef __ASM_GENERIC_RWONCE_H +#define __ASM_GENERIC_RWONCE_H + +#ifndef __ASSEMBLY__ + +#include <linux/compiler_types.h> +#include <linux/kasan-checks.h> +#include <linux/kcsan-checks.h> + +/* + * Yes, this permits 64-bit accesses on 32-bit architectures. These will + * actually be atomic in some cases (namely Armv7 + LPAE), but for others we + * rely on the access being split into 2x32-bit accesses for a 32-bit quantity + * (e.g. a virtual address) and a strong prevailing wind. + */ +#define compiletime_assert_rwonce_type(t) \ + compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ + "Unsupported access size for {READ,WRITE}_ONCE().") + +/* + * Use __READ_ONCE() instead of READ_ONCE() if you do not require any + * atomicity. Note that this may result in tears! + */ +#ifndef __READ_ONCE +#define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) +#endif + +#define READ_ONCE(x) \ + ({ \ + compiletime_assert_rwonce_type(x); \ + __READ_ONCE(x); \ + }) + +#define __WRITE_ONCE(x, val) \ + do { \ + *(volatile typeof(x) *)&(x) = (val); \ + } while (0) + +#define WRITE_ONCE(x, val) \ + do { \ + compiletime_assert_rwonce_type(x); \ + __WRITE_ONCE(x, val); \ + } while (0) + +static __always_inline unsigned long __read_once_word_nocheck(const void *addr) +{ + return __READ_ONCE(*(unsigned long *)addr); +} + +/* + * Use READ_ONCE_NOCHECK() instead of READ_ONCE() if you need to load a + * word from memory atomically but without telling KASAN/KCSAN. This is + * usually used by unwinding code when walking the stack of a running process. + */ +#define READ_ONCE_NOCHECK(x) \ + ({ \ + compiletime_assert( \ + sizeof(x) == sizeof(unsigned long), \ + "Unsupported access size for READ_ONCE_NOCHECK()."); \ + (typeof(x)) __read_once_word_nocheck(&(x)); \ + }) + +static __always_inline unsigned long read_word_at_a_time(const void *addr) +{ + kasan_check_read(addr, 1); + return *(unsigned long *)addr; +} + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_GENERIC_RWONCE_H */ diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/crc32c.c b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/crc32c.c new file mode 100644 index 000000000..0d5090e2c --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/crc32c.c @@ -0,0 +1,93 @@ +#include "crc32c.h" +/*****************************************************************/ +/* */ +/* CRC LOOKUP TABLE */ +/* ================ */ +/* The following CRC lookup table was generated automagically */ +/* by the Rocksoft^tm Model CRC Algorithm Table Generation */ +/* Program V1.0 using the following model parameters: */ +/* */ +/* Width : 4 bytes. */ +/* Poly : 0x1EDC6F41L */ +/* Reverse : TRUE. */ +/* */ +/* For more information on the Rocksoft^tm Model CRC Algorithm, */ +/* see the document titled "A Painless Guide to CRC Error */ +/* Detection Algorithms" by Ross Williams */ +/* (ross@guest.adelaide.edu.au.). This document is likely to be */ +/* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft". */ +/* */ +/*****************************************************************/ + +unsigned long crctable[256] = { + 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L, 0xC79A971FL, + 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL, 0x8AD958CFL, 0x78B2DBCCL, + 0x6BE22838L, 0x9989AB3BL, 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, + 0x5E133C24L, 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL, + 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L, 0x9A879FA0L, + 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L, 0x5D1D08BFL, 0xAF768BBCL, + 0xBC267848L, 0x4E4DFB4BL, 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, + 0x33ED7D2AL, 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L, + 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L, 0x6DFE410EL, + 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL, 0x30E349B1L, 0xC288CAB2L, + 0xD1D83946L, 0x23B3BA45L, 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, + 0xE4292D5AL, 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL, + 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L, 0x417B1DBCL, + 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L, 0x86E18AA3L, 0x748A09A0L, + 0x67DAFA54L, 0x95B17957L, 0xCBA24573L, 0x39C9C670L, 0x2A993584L, + 0xD8F2B687L, 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L, + 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L, 0x96BF4DCCL, + 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L, 0xDBFC821CL, 0x2997011FL, + 0x3AC7F2EBL, 0xC8AC71E8L, 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, + 0x0F36E6F7L, 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L, + 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L, 0xEB1FCBADL, + 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L, 0x2C855CB2L, 0xDEEEDFB1L, + 0xCDBE2C45L, 0x3FD5AF46L, 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, + 0x62C8A7F9L, 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L, + 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L, 0x3CDB9BDDL, + 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L, 0x82F63B78L, 0x709DB87BL, + 0x63CD4B8FL, 0x91A6C88CL, 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, + 0x563C5F93L, 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L, + 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL, 0x92A8FC17L, + 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L, 0x55326B08L, 0xA759E80BL, + 0xB4091BFFL, 0x466298FCL, 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, + 0x0B21572CL, 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L, + 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L, 0x65D122B9L, + 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL, 0x2892ED69L, 0xDAF96E6AL, + 0xC9A99D9EL, 0x3BC21E9DL, 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, + 0xFC588982L, 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL, + 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L, 0x38CC2A06L, + 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L, 0xFF56BD19L, 0x0D3D3E1AL, + 0x1E6DCDEEL, 0xEC064EEDL, 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, + 0xD0DDD530L, 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL, + 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL, 0x8ECEE914L, + 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L, 0xD3D3E1ABL, 0x21B862A8L, + 0x32E8915CL, 0xC083125FL, 0x144976B4L, 0xE622F5B7L, 0xF5720643L, + 0x07198540L, 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L, + 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL, 0xE330A81AL, + 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL, 0x24AA3F05L, 0xD6C1BC06L, + 0xC5914FF2L, 0x37FACCF1L, 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, + 0x7AB90321L, 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL, + 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L, 0x34F4F86AL, + 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL, 0x79B737BAL, 0x8BDCB4B9L, + 0x988C474DL, 0x6AE7C44EL, 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, + 0xAD7D5351L}; + +/*****************************************************************/ +/* End of CRC Lookup Table */ +/*****************************************************************/ + +uint32_t crc32c(uint8_t *data, int length) +{ + const uint32_t CRC_INIT = 0xffffffffL; + const uint32_t XO_ROT = 0xffffffffL; + + uint32_t crc = CRC_INIT; + + while (length--) { + crc = crctable[(crc ^ *data++) & 0xFFL] ^ (crc >> 8); + } + crc = crc ^ XO_ROT; + + return crc; +} diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/crc32c.h b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/crc32c.h new file mode 100644 index 000000000..4586547e6 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/crc32c.h @@ -0,0 +1,16 @@ +#ifndef CRC32C_H +#define CRC32C_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stdint.h> +#include <stdlib.h> + +uint32_t crc32c(uint8_t *buf, int len); + +#ifdef __cplusplus +} +#endif +#endif /* CRC32C_H */ diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/libmctp-smbus.h b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/libmctp-smbus.h new file mode 100644 index 000000000..67690bcb3 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/libmctp-smbus.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: Apache-2.0 */ + +#ifndef _LIBMCTP_SMBUS_H +#define _LIBMCTP_SMBUS_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "libmctp.h" + +struct mctp_binding_smbus; + +struct mctp_binding_smbus *mctp_smbus_init(void); +int mctp_smbus_get_out_fd(struct mctp_binding_smbus *smbus); +int mctp_smbus_get_in_fd(struct mctp_binding_smbus *smbus); +void mctp_smbus_register_bus(struct mctp_binding_smbus *smbus, + struct mctp *mctp, mctp_eid_t eid); +int mctp_smbus_read(struct mctp_binding_smbus *smbus); +int mctp_smbus_open_bus(struct mctp_binding_smbus *smbus, int out_bus_num, + int root_bus_num); +void mctp_smbus_free(struct mctp_binding_smbus *smbus); +int mctp_smbus_open_in_bus(struct mctp_binding_smbus *smbus, int in_bus); +int mctp_smbus_open_out_bus(struct mctp_binding_smbus *smbus, int out_bus); +int mctp_smbus_set_in_fd(struct mctp_binding_smbus *smbus, int fd); +int mctp_smbus_set_out_fd(struct mctp_binding_smbus *smbus, int fd); + +#ifdef __cplusplus +} +#endif +#endif /* _LIBMCTP_SMBUS_H */ diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/smbus.c b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/smbus.c new file mode 100644 index 000000000..2f099a7e5 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp/smbus.c @@ -0,0 +1,467 @@ +/* SPDX-License-Identifier: Apache-2.0 */ + +#include <assert.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#ifdef MCTP_HAVE_FILEIO +#include <fcntl.h> +#endif + +#define pr_fmt(x) "smbus: " x + +#include <i2c/smbus.h> +#include <linux/i2c-dev.h> +#include <linux/i2c.h> +#include <sys/ioctl.h> + +#include "libmctp-alloc.h" +#include "libmctp-log.h" +#include "libmctp-smbus.h" +#include "libmctp.h" + +struct mctp_binding_smbus { + struct mctp_binding binding; + int out_fd; + int in_fd; + + unsigned long bus_id; + + /* receive buffer */ + uint8_t rxbuf[1024]; + struct mctp_pktbuf *rx_pkt; + + /* temporary transmit buffer */ + uint8_t txbuf[256]; +}; + +#ifndef container_of +#define container_of(ptr, type, member) \ + (type *)((char *)(ptr) - (char *)&((type *)0)->member) +#endif + +#define binding_to_smbus(b) container_of(b, struct mctp_binding_smbus, binding) + +#define MCTP_COMMAND_CODE 0x0F +#define MCTP_SLAVE_ADDRESS 0x1d +#define MCTP_SOURCE_SLAVE_ADDRESS 0x21 + +#define SMBUS_PEC_BYTE_SIZE 1 +#define SMBUS_COMMAND_CODE_SIZE 1 +#define SMBUS_LENGTH_FIELD_SIZE 1 +#define SMBUS_ADDR_OFFSET_SLAVE 0x1000 + +struct mctp_smbus_header_tx { + uint8_t source_slave_address; +}; + +struct mctp_smbus_header_rx { + uint8_t destination_slave_address; + uint8_t command_code; + uint8_t byte_count; + uint8_t source_slave_address; +}; + +#define POLYCHECK (0x1070U << 3) +static uint8_t crc8_calculate(uint16_t d) +{ + int i; + + for (i = 0; i < 8; i++) { + if (d & 0x8000) { + d = d ^ POLYCHECK; + } + d = d << 1; + } + + return (uint8_t)(d >> 8); +} + +/* Incremental CRC8 over count bytes in the array pointed to by p */ +static uint8_t pec_calculate(uint8_t crc, uint8_t *p, size_t count) +{ + int i; + + for (i = 0; i < count; i++) { + crc = crc8_calculate((crc ^ p[i]) << 8); + } + + return crc; +} + +static uint8_t calculate_pec_byte(uint8_t *buf, size_t len, uint8_t address, + uint16_t flags) +{ + uint8_t addr = (address << 1) | (flags & I2C_M_RD ? 1 : 0); + uint8_t pec = pec_calculate(0, &addr, 1); + pec = pec_calculate(pec, buf, len); + + return pec; +} + +static int mctp_smbus_tx(struct mctp_binding_smbus *smbus, uint8_t len) +{ + +#ifdef I2C_M_HOLD + /* Hold message */ + static uint16_t holdtimeout = 1000; // timeout in ms. + struct i2c_msg msg[2] = +#else // !I2C_M_HOLD + struct i2c_msg msg[1] = +#endif // I2C_M_HOLD + {{.addr = MCTP_SLAVE_ADDRESS, + .flags = 0, + .len = len, + .buf = (__uint8_t *)smbus->txbuf} +#ifdef I2C_M_HOLD + , + {.addr = 0, + .flags = I2C_M_HOLD, + .len = sizeof(holdtimeout), + .buf = (__uint8_t *)&holdtimeout} +#endif // I2C_M_HOLD + }; + +#ifdef I2C_M_HOLD + struct i2c_rdwr_ioctl_data msgrdwr = {&msg, 2}; +#else // !I2C_M_HOLD + struct i2c_rdwr_ioctl_data msgrdwr = {&msg, 1}; +#endif // I2C_M_HOLD + + return ioctl(smbus->out_fd, I2C_RDWR, &msgrdwr); +} + +#ifdef I2C_M_HOLD +static int mctp_smbus_unhold_bus(struct mctp_binding_smbus *smbus) +{ + /* Unhold message */ + static uint16_t holdtimeout = 0; // unhold + struct i2c_msg holdmsg = {0, I2C_M_HOLD, sizeof(holdtimeout), + (__uint8_t *)&holdtimeout}; + + struct i2c_rdwr_ioctl_data msgrdwr = {&holdmsg, 1}; + + return ioctl(smbus->out_fd, I2C_RDWR, &msgrdwr); +} +#endif // I2C_M_HOLD + +static int mctp_binding_smbus_tx(struct mctp_binding *b, + struct mctp_pktbuf *pkt) +{ + struct mctp_binding_smbus *smbus = binding_to_smbus(b); + struct mctp_smbus_header_tx *hdr; + size_t pkt_length; + + uint8_t i2c_message_buf[256]; + uint8_t *buf_ptr; + uint8_t i2c_message_len; + + uint16_t timeout = 1000; + + /* the length field in the header excludes smbus framing + * and escape sequences */ + pkt_length = mctp_pktbuf_size(pkt); + + buf_ptr = (void *)smbus->txbuf; + *buf_ptr = MCTP_COMMAND_CODE; + buf_ptr++; + *buf_ptr = pkt_length + sizeof(*hdr); + buf_ptr++; + + hdr = (void *)buf_ptr; + hdr->source_slave_address = MCTP_SOURCE_SLAVE_ADDRESS; + buf_ptr = (buf_ptr + sizeof(*hdr)); + memcpy(buf_ptr, &pkt->data[pkt->start], pkt_length); + buf_ptr = buf_ptr + pkt_length; + + uint8_t pec_byte = calculate_pec_byte( + smbus->txbuf, + SMBUS_COMMAND_CODE_SIZE + SMBUS_LENGTH_FIELD_SIZE + sizeof(*hdr) + + pkt_length, + MCTP_SLAVE_ADDRESS, 0); + + *buf_ptr = pec_byte; + + i2c_message_len = SMBUS_COMMAND_CODE_SIZE + SMBUS_LENGTH_FIELD_SIZE + + sizeof(*hdr) + pkt_length + + SMBUS_PEC_BYTE_SIZE; // command code, length, + // header, data, pec byte + + if (mctp_smbus_tx(smbus, i2c_message_len)) { + mctp_prerr("Can't hold mux"); + return -1; + } + + return 0; +} + +#ifdef MCTP_HAVE_FILEIO +int mctp_smbus_read(struct mctp_binding_smbus *smbus) +{ + ssize_t len = 0; + struct mctp_smbus_header_rx *hdr; + int ret = 0; + + do { + ret = lseek(smbus->in_fd, 0, SEEK_SET); + if (ret < 0) { + mctp_prerr("Failed to seek"); + ret = -1; + } + + len = read(smbus->in_fd, smbus->rxbuf, sizeof(smbus->rxbuf)); + if (len < sizeof(*hdr)) { + // This condition hits from from time to time, even with + // a properly written poll loop, although it's not clear + // why. Return an error so that the upper layer can + // retry. + ret = 0; + break; + } + + hdr = (void *)smbus->rxbuf; + if (hdr->destination_slave_address + != (MCTP_SOURCE_SLAVE_ADDRESS & ~1)) { + mctp_prerr("Got bad slave address %d", + hdr->destination_slave_address); + ret = 0; + break; + } + if (hdr->command_code != MCTP_COMMAND_CODE) { + mctp_prerr("Got bad command code %d", + hdr->command_code); + // Not a payload intended for us + ret = 0; + break; + } + + if (hdr->byte_count != (len - sizeof(*hdr))) { + // Got an incorrectly sized payload + mctp_prerr("Got smbus payload sized %d, expecting %d", + hdr->byte_count, len - sizeof(*hdr)); + ret = 0; + break; + } + + if (len < 0) { + mctp_prerr("can't read from smbus device: %m"); + ret = -1; + break; + } + + smbus->rx_pkt = mctp_pktbuf_alloc(&(smbus->binding), 0); + assert(smbus->rx_pkt); + + if (mctp_pktbuf_push(smbus->rx_pkt, &smbus->rxbuf[sizeof(*hdr)], + len - sizeof(*hdr) - SMBUS_PEC_BYTE_SIZE) + != 0) { + mctp_prerr("Can't push tok pktbuf: %m"); + ret = -1; + break; + } + + mctp_bus_rx(&(smbus->binding), smbus->rx_pkt); + + smbus->rx_pkt = NULL; + + } while (0); + +#ifdef I2C_M_HOLD + if (mctp_smbus_unhold_bus(smbus)) { + mctp_prerr("Can't hold mux"); + ret = -1; + } +#endif // I2C_M_HOLD + + return ret; +} + +int mctp_smbus_get_in_fd(struct mctp_binding_smbus *smbus) +{ + return smbus->in_fd; +} + + +int mctp_smbus_set_in_fd(struct mctp_binding_smbus *smbus, int fd) +{ + smbus->in_fd = fd; +} + +int mctp_smbus_set_out_fd(struct mctp_binding_smbus *smbus, int fd) +{ + smbus->out_fd = fd; +} + +int mctp_smbus_get_out_fd(struct mctp_binding_smbus *smbus) +{ + return smbus->out_fd; +} + +int mctp_smbus_open_in_bus(struct mctp_binding_smbus *smbus, int in_bus) +{ + char filename[60]; + size_t filename_size = 0; + char slave_mqueue[20]; + size_t mqueue_size = 0; + int fd = 0; + size_t size = sizeof(filename); + int address_7_bit = MCTP_SOURCE_SLAVE_ADDRESS >> 1; + int ret = -1; + + snprintf(filename, size, + "/sys/bus/i2c/devices/i2c-%d/%d-%04x/slave-mqueue", in_bus, + in_bus, SMBUS_ADDR_OFFSET_SLAVE | address_7_bit); + + ret = open(filename, O_RDONLY | O_NONBLOCK | O_CLOEXEC); + if (ret >= 0) { + return ret; + } + + // Device doesn't exist. Create it. + filename_size = sizeof(filename); + snprintf(filename, filename_size, + "/sys/bus/i2c/devices/i2c-%d/new_device", in_bus); + filename[filename_size - 1] = '\0'; + + fd = open(filename, O_WRONLY); + if (fd < 0) { + mctp_prerr("can't open root device %s: %m", filename); + return -1; + } + + mqueue_size = sizeof(slave_mqueue); + snprintf(slave_mqueue, mqueue_size, "slave-mqueue %#04x", + SMBUS_ADDR_OFFSET_SLAVE | address_7_bit); + + size = write(fd, slave_mqueue, mqueue_size); + close(fd); + if (size != mqueue_size) { + mctp_prerr("can't create mqueue device on %s: %m", filename); + return -1; + } + + size = sizeof(filename); + snprintf(filename, size, + "/sys/bus/i2c/devices/i2c-%d/%d-%04x/slave-mqueue", in_bus, + in_bus, SMBUS_ADDR_OFFSET_SLAVE | address_7_bit); + + return open(filename, O_RDONLY | O_NONBLOCK | O_CLOEXEC); +} + +int mctp_smbus_open_out_bus(struct mctp_binding_smbus *smbus, int out_bus) +{ + char filename[60]; + size_t size = sizeof(filename); + snprintf(filename, size, "/dev/i2c-%d", out_bus); + filename[size - 1] = '\0'; + + return open(filename, O_RDWR | O_NONBLOCK); +} + +/* +int mctp_smbus_open_bus(struct mctp_binding_smbus *smbus, int out_bus_num, + int root_bus_num) +{ + char filename[60]; + size_t filename_size = 0; + char slave_mqueue[20]; + size_t mqueue_size = 0; + int fd = 0; + size_t size = sizeof(filename); + int address_7_bit = MCTP_SOURCE_SLAVE_ADDRESS >> 1; + + snprintf(filename, size, + "/sys/bus/i2c/devices/i2c-%d/%d-%04x/slave-mqueue", + root_bus_num, root_bus_num, + SMBUS_ADDR_OFFSET_SLAVE | address_7_bit); + + smbus->in_fd = open(filename, O_RDONLY | O_NONBLOCK | O_CLOEXEC); + if (smbus->in_fd < 0) { + // Device doesn't exist. Create it. + filename_size = sizeof(filename); + snprintf(filename, filename_size, + "/sys/bus/i2c/devices/i2c-%d/new_device", + root_bus_num); + filename[filename_size - 1] = '\0'; + + fd = open(filename, O_WRONLY); + if (fd < 0) { + mctp_prerr("can't open root device %s: %m", filename); + return -1; + } + + mqueue_size = sizeof(slave_mqueue); + snprintf(slave_mqueue, mqueue_size, "slave-mqueue %#04x", + SMBUS_ADDR_OFFSET_SLAVE | address_7_bit); + + size = write(fd, slave_mqueue, mqueue_size); + close(fd); + if (size != mqueue_size) { + mctp_prerr("can't create mqueue device on %s: %m", + filename); + return -1; + } + + size = sizeof(filename); + snprintf(filename, size, + "/sys/bus/i2c/devices/i2c-%d/%d-%04x/slave-mqueue", + root_bus_num, root_bus_num, + SMBUS_ADDR_OFFSET_SLAVE | address_7_bit); + + smbus->in_fd = + open(filename, O_RDONLY | O_NONBLOCK | O_CLOEXEC); + if (smbus->in_fd < 0) { + mctp_prerr("can't open mqueue device on %s: %m", + filename); + return -2; + } + } + + size = sizeof(filename); + snprintf(filename, size, "/dev/i2c-%d", out_bus_num); + filename[size - 1] = '\0'; + + smbus->out_fd = open(filename, O_RDWR | O_NONBLOCK); + if (smbus->out_fd < 0) { + close(smbus->in_fd); + mctp_prerr("can't open device %s: %m", filename); + } + + return 0; +} +*/ +#endif + +void mctp_smbus_register_bus(struct mctp_binding_smbus *smbus, + struct mctp *mctp, mctp_eid_t eid) +{ + smbus->bus_id = mctp_register_bus(mctp, &smbus->binding, eid); + mctp_binding_set_tx_enabled(&smbus->binding, true); +} + +struct mctp_binding_smbus *mctp_smbus_init(void) +{ + struct mctp_binding_smbus *smbus; + + smbus = __mctp_alloc(sizeof(*smbus)); + memset(&(smbus->binding), 0, sizeof(smbus->binding)); + + smbus->in_fd = -1; + smbus->out_fd = -1; + + smbus->rx_pkt = NULL; + smbus->binding.name = "smbus"; + smbus->binding.version = 1; + smbus->binding.pkt_size = sizeof(smbus->rxbuf); + + smbus->binding.tx = mctp_binding_smbus_tx; + return smbus; +} + +void mctp_smbus_free(struct mctp_binding_smbus *smbus) +{ + __mctp_free(smbus); +} diff --git a/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp_git.bb b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp_git.bb new file mode 100644 index 000000000..eba56f829 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/interfaces/libmctp_git.bb @@ -0,0 +1,47 @@ +SUMMARY = "libmctp" +DESCRIPTION = "Implementation of MCTP (DTMF DSP0236)" + +SRC_URI = "git://github.com/openbmc/libmctp.git" +SRCREV = "663ec39ea107c2a736f9bcb20cbfdfa623092ab1" + +PV = "0.1+git${SRCPV}" + +LICENSE = "Apache-2.0 | GPLv2" +LIC_FILES_CHKSUM = "file://LICENSE;md5=0d30807bb7a4f16d36e96b78f9ed8fae" + +inherit cmake + +S = "${WORKDIR}/git" + +DEPENDS += "i2c-tools" + +FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:" + +SRC_URI += "file://0001-Smbus-changes-for-libmctp.patch \ + file://0002-Fix-Memory-Leak.patch \ + file://CMakeLists.txt \ + file://crc32c.c \ + file://crc32c.h \ + file://libmctp-smbus.h \ + file://smbus.c" + +do_configure:prepend() { + cp -f ${WORKDIR}/*.c ${S} + cp -f ${WORKDIR}/*.h ${S} + cp -f ${WORKDIR}/CMakeLists.txt ${S} +} + +# linux-libc-headers guides this way to include custom uapi headers +CFLAGS:append = " -I ${STAGING_KERNEL_DIR}/include/uapi" +CFLAGS:append = " -I ${STAGING_KERNEL_DIR}/include" +CXXFLAGS:append = " -I ${STAGING_KERNEL_DIR}/include/uapi" +CXXFLAGS:append = " -I ${STAGING_KERNEL_DIR}/include" + +do_configure[depends] += "virtual/kernel:do_shared_workdir" + +# Copying the depricated header from kernel as a temporary fix to resolve build breaks. +# It should be removed later after fixing the header dependency in this repository. +SRC_URI += "file://asm/rwonce.h" +do_configure:prepend() { + cp -r ${WORKDIR}/asm ${S}/asm +} |